"[-knqrsv] MODULE [symbol=value...]"
#define modprobe_full_usage "\n\n" \
"Options:" \
+ USE_FEATURE_2_4_MODULES( \
"\n -k Make module autoclean-able" \
+ ) \
"\n -n Dry run" \
"\n -q Quiet" \
"\n -r Remove module (stacks) or do autoclean" \
"\n -s Report via syslog instead of stderr" \
"\n -v Verbose" \
+ USE_FEATURE_MODPROBE_BLACKLIST( \
+ "\n -b Apply blacklist to module names too" \
+ )
#define modprobe_notes_usage \
"modprobe can (un)load a stack of modules, passing each module options (when\n" \
}
}
-#ifdef UNUSED
/* Reverse list order. */
llist_t* FAST_FUNC llist_rev(llist_t *list)
{
}
return rev;
}
-#endif
menu "Linux Module Utilities"
+config DEFAULT_MODULES_DIR
+ string "Default directory containing modules"
+ default "/lib/modules"
+ help
+ Directory that contains kernel modules.
+ Defaults to "/lib/modules"
+
+config DEFAULT_DEPMOD_FILE
+ string "Default name of modules.dep"
+ default "modules.dep"
+ help
+ Filename that contains kernel modules dependencies.
+ Defaults to "modules.dep"
+
config MODPROBE_SMALL
bool "Simplified modutils"
default n
Check if the module is already loaded.
N.B. It's racy.
-config DEPMOD
- bool "depmod"
+config INSMOD
+ bool "insmod"
default n
depends on !MODPROBE_SMALL
help
- depmod generates modules.dep (FIXME: elaborate)
+ insmod is used to load specified modules in the running kernel.
-config FEATURE_DEPMOD_PRUNE_FANCY
- bool "Fancy dependency pruning"
+config RMMOD
+ bool "rmmod"
default n
- depends on DEPMOD
+ depends on !MODPROBE_SMALL
help
- By default modules.dep contains all dependencies as listed by
- the modules.
- If you enable this option then we remove implied modules from
- the dependencies.
- This makes depmod somewhat bigger but generates a smaller
- modules.dep file.
+ rmmod is used to unload specified modules from the kernel.
- If unsure, say N.
+config LSMOD
+ bool "lsmod"
+ default n
+ depends on !MODPROBE_SMALL
+ help
+ lsmod is used to display a list of loaded modules.
-config FEATURE_DEPMOD_ALIAS
- bool "Alias support"
+config FEATURE_LSMOD_PRETTY_2_6_OUTPUT
+ bool "Pretty output"
default n
- depends on DEPMOD
+ depends on LSMOD
help
- By default modules.dep does not contain alias information.
- Enable this to emit aliases of the form:
+ This option makes output format of lsmod adjusted to
+ the format of module-init-tools for Linux kernel 2.6.
+ Increases size somewhat.
- alias pcmcia:m*c*f03fn*pfn*pa*pb*pc*pd* parport_cs
+config MODPROBE
+ bool "modprobe"
+ default n
+ depends on !MODPROBE_SMALL
+ help
+ Handle the loading of modules, and their dependencies on a high
+ level.
-config INSMOD
- bool "insmod"
+ Note that in the state, modprobe does not understand multiple
+ module options from the configuration file. See option below.
+
+config FEATURE_MODPROBE_BLACKLIST
+ bool
+ prompt "Blacklist support"
+ default n
+ depends on MODPROBE
+ help
+ Say 'y' here to enable support for the 'blacklist' command in
+ modprobe.conf. This prevents the alias resolver to resolve
+ blacklisted modules. This is useful if you want to prevent your
+ hardware autodetection scripts to load modules like evdev, frame
+ buffer drivers etc.
+
+config DEPMOD
+ bool "depmod"
default n
depends on !MODPROBE_SMALL
help
- insmod is used to load specified modules in the running kernel.
+ depmod generates modules.dep (and potentially modules.alias
+ and modules.symbols) that contain dependency information
+ for modprobe.
+
+comment "Options common to multiple modutils"
+
+config FEATURE_2_4_MODULES
+ bool "Support version 2.2/2.4 Linux kernels"
+ default n
+ depends on INSMOD || RMMOD || LSMOD
+ help
+ Support module loading for 2.2.x and 2.4.x Linux kernels.
+ This increases size considerably. Say N unless you plan
+ to run ancient kernels.
config FEATURE_INSMOD_VERSION_CHECKING
- bool "Module version checking"
+ bool "Enable module version checking"
default n
- depends on INSMOD && FEATURE_2_4_MODULES
+ depends on FEATURE_2_4_MODULES && (INSMOD || MODPROBE)
help
Support checking of versions for modules. This is used to
ensure that the kernel and module are made for each other.
config FEATURE_INSMOD_KSYMOOPS_SYMBOLS
bool "Add module symbols to kernel symbol table"
default n
- depends on INSMOD && FEATURE_2_4_MODULES
+ depends on FEATURE_2_4_MODULES && (INSMOD || MODPROBE)
help
By adding module symbols to the kernel symbol table, Oops messages
occuring within kernel modules can be properly debugged. By enabling
config FEATURE_INSMOD_LOADINKMEM
bool "In kernel memory optimization (uClinux only)"
default n
- depends on INSMOD && FEATURE_2_4_MODULES
+ depends on FEATURE_2_4_MODULES && (INSMOD || MODPROBE)
help
This is a special uClinux only memory optimization that lets insmod
load the specified kernel module directly into kernel space, reducing
being loaded into memory.
config FEATURE_INSMOD_LOAD_MAP
- bool "Enable load map (-m) option"
+ bool "Enable insmod load map (-m) option"
default n
- depends on INSMOD && ( FEATURE_2_4_MODULES || FEATURE_2_6_MODULES )
+ depends on FEATURE_2_4_MODULES && INSMOD
help
Enabling this, one would be able to get a load map
output on stdout. This makes kernel module debugging
config FEATURE_INSMOD_LOAD_MAP_FULL
bool "Symbols in load map"
default y
- depends on FEATURE_INSMOD_LOAD_MAP
+ depends on FEATURE_INSMOD_LOAD_MAP && !MODPROBE_SMALL
help
Without this option, -m will only output section
load map. With this option, -m will also output
symbols load map.
-config RMMOD
- bool "rmmod"
- default n
- depends on !MODPROBE_SMALL
- help
- rmmod is used to unload specified modules from the kernel.
-
-config LSMOD
- bool "lsmod"
- default n
- depends on !MODPROBE_SMALL
- help
- lsmod is used to display a list of loaded modules.
-
-config FEATURE_LSMOD_PRETTY_2_6_OUTPUT
- bool "Pretty output for 2.6.x Linux kernels"
- default n
- depends on LSMOD
- help
- This option makes output format of lsmod adjusted to
- the format of module-init-tools for Linux kernel 2.6.
-
-config MODPROBE
- bool "modprobe"
- default n
- depends on !MODPROBE_SMALL
- help
- Handle the loading of modules, and their dependencies on a high
- level.
-
- Note that in the state, modprobe does not understand multiple
- module options from the configuration file. See option below.
-
-config FEATURE_MODPROBE_MULTIPLE_OPTIONS
- bool
- prompt "Multiple options parsing"
- default y
- depends on MODPROBE
- help
- Allow modprobe to understand more than one option to pass to
- modules.
-
- This is a WIP, while waiting for a common argument parsing
- common amongst all BB applets (shell, modprobe, etc...) and
- adds around 600 bytes on x86, 700 bytes on ARM. The code is
- biggish and uggly, but just works.
-
- Saying Y here is not a bad idea if you're not that short
- on storage capacity.
-
-config FEATURE_MODPROBE_FANCY_ALIAS
- bool
- prompt "Fancy alias parsing"
- default y
- depends on MODPROBE && FEATURE_2_6_MODULES
- help
- Say 'y' here to enable parsing of aliases with underscore/dash
- mismatch between module name and file name, along with bus-specific
- aliases (such as pci:... or usb:... aliases).
-
-config FEATURE_MODPROBE_BLACKLIST
- bool
- prompt "Blacklist support"
- default n
- depends on MODPROBE && FEATURE_2_6_MODULES
- help
- Say 'y' here to enable support for the 'blacklist' command in
- modprobe.conf. This prevents the alias resolver to resolve
- blacklisted modules. This is useful if you want to prevent your
- hardware autodetection scripts to load modules like evdev, frame
- buffer drivers etc.
-
-comment "Options common to multiple modutils"
- depends on INSMOD || RMMOD || MODPROBE || LSMOD || DEPMOD
-
config FEATURE_CHECK_TAINTED_MODULE
- # Simulate indentation
bool "Support tainted module checking with new kernels"
default y
- depends on INSMOD || LSMOD
+ depends on !MODPROBE_SMALL
help
Support checking for tainted modules. These are usually binary
only modules that will make the linux-kernel list ignore your
support request.
This option is required to support GPLONLY modules.
-config FEATURE_2_4_MODULES
- # Simulate indentation
- bool "Support version 2.2.x to 2.4.x Linux kernels"
+config FEATURE_MODUTILS_ALIAS
+ bool "Support for module.aliases file"
default y
- depends on INSMOD || RMMOD || MODPROBE
+ depends on DEPMOD || MODPROBE
help
- Support module loading for 2.2.x and 2.4.x Linux kernels.
+ Generate and parse modules.alias containing aliases for bus
+ identifiers:
+ alias pcmcia:m*c*f03fn*pfn*pa*pb*pc*pd* parport_cs
- Note:
- This is automatically enabled if 2.6 modules are not enabled.
+ and aliases for logical modules names e.g.:
+ alias padlock_aes aes
+ alias aes_i586 aes
+ alias aes_generic aes
-config FEATURE_2_6_MODULES
- # Simulate indentation
- bool "Support version 2.6.x Linux kernels"
- default y
- depends on INSMOD || RMMOD || MODPROBE
- help
- Support module loading for newer 2.6.x Linux kernels.
-
-config DEFAULT_MODULES_DIR
- # Simulate indentation
- string "Default directory containing modules"
- default "/lib/modules"
- depends on INSMOD || RMMOD || MODPROBE || MODPROBE_SMALL || DEPMOD
- help
- Directory that contains kernel modules.
- Defaults to "/lib/modules"
+ Say Y if unsure.
-config DEFAULT_DEPMOD_FILE
- # Simulate indentation
- string "Default name of modules.dep"
- default "modules.dep"
- depends on INSMOD || RMMOD || MODPROBE || MODPROBE_SMALL || DEPMOD
+config FEATURE_MODUTILS_SYMBOLS
+ bool "Support for module.symbols file"
+ default y
+ depends on DEPMOD || MODPROBE
help
- Filename that contains kernel modules dependencies.
- Defaults to "modules.dep"
+ Generate and parse modules.symbols containing aliases for
+ symbol_request() kernel calls, such as:
+ alias symbol:usb_sg_init usbcore
-config FEATURE_QUERY_MODULE_INTERFACE
- bool
- default y
- depends on FEATURE_2_4_MODULES && !FEATURE_2_6_MODULES
+ Say Y if unsure.
endmenu
# Licensed under the GPL v2, see the file LICENSE in this tarball.
lib-y:=
-lib-$(CONFIG_DEPMOD) += depmod.o
-lib-$(CONFIG_INSMOD) += insmod.o
-lib-$(CONFIG_LSMOD) += lsmod.o
-lib-$(CONFIG_MODPROBE) += modprobe.o
-lib-$(CONFIG_MODPROBE_SMALL) += modprobe-small.o
-lib-$(CONFIG_RMMOD) += rmmod.o
+lib-$(CONFIG_MODPROBE_SMALL) += modprobe-small.o
+lib-$(CONFIG_DEPMOD) += depmod.o modutils.o
+lib-$(CONFIG_INSMOD) += insmod.o modutils.o
+lib-$(CONFIG_LSMOD) += lsmod.o modutils.o
+lib-$(CONFIG_MODPROBE) += modprobe.o modutils.o
+lib-$(CONFIG_RMMOD) += rmmod.o modutils.o
+lib-$(CONFIG_FEATURE_2_4_MODULES) += modutils-24.o
/*
* depmod - generate modules.dep
* Copyright (c) 2008 Bernhard Fischer
+ * Copyrihgt (c) 2008 Timo Teras <timo.teras@iki.fi>
+ * Copyright (c) 2008 Vladimir Dronnikov
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#define _GNU_SOURCE
#include <libbb.h>
#include <sys/utsname.h> /* uname() */
+#include "modutils.h"
+
/*
* Theory of operation:
* - iterate over all modules and record their full path
* for each depends, look through our list of full paths and emit if found
*/
-typedef struct dep_lst_t {
- char *name;
+typedef struct module_info {
+ struct module_info *next;
+ char *name, *modname;
llist_t *dependencies;
llist_t *aliases;
- struct dep_lst_t *next;
-} dep_lst_t;
-
-struct globals {
- dep_lst_t *lst; /* modules without their corresponding extension */
+ llist_t *symbols;
+ struct module_info *dnext, *dprev;
+} module_info;
+
+enum {
+ ARG_a = (1<<0), /* All modules, ignore mods in argv */
+ ARG_A = (1<<1), /* Only emit .ko that are newer than modules.dep file */
+ ARG_b = (1<<2), /* not /lib/modules/$(uname -r)/ but this base-dir */
+ ARG_e = (1<<3), /* with -F, print unresolved symbols */
+ ARG_F = (1<<4), /* System.map that contains the symbols */
+ ARG_n = (1<<5) /* dry-run, print to stdout only */
};
-#define G (*(struct globals*)&bb_common_bufsiz1)
-/* We have to zero it out because of NOEXEC */
-#define INIT_G() memset(&G, 0, sizeof(G))
-static char* find_keyword(void *the_module, size_t len, const char * const word)
+static int FAST_FUNC parse_module(const char *fname, struct stat *sb,
+ void *data, int UNUSED_PARAM depth)
{
- char *ptr = the_module;
- do {
- /* search for the first char in word */
- ptr = memchr(ptr, *word, len - (ptr - (char*)the_module));
- if (ptr == NULL) /* no occurance left, done */
- return NULL;
- if (!strncmp(ptr, word, strlen(word))) {
- ptr += strlen(word);
- break;
+ module_info **first = (module_info **) data;
+ char *image, *ptr;
+ module_info *info;
+ size_t len = sb->st_size;
+
+ if (strrstr(fname, ".ko") == NULL)
+ return TRUE;
+
+ image = (char *) xmalloc_open_zipped_read_close(fname, &len);
+ info = xzalloc(sizeof(module_info));
+
+ info->next = *first;
+ *first = info;
+
+ info->dnext = info->dprev = info;
+ info->name = xstrdup(fname);
+ info->modname = filename2modname(fname, NULL);
+ for (ptr = image; ptr < image + len - 10; ptr++) {
+ if (strncmp(ptr, "depends=", 8) == 0) {
+ char *u;
+
+ ptr += 8;
+ for (u = ptr; *u; u++)
+ if (*u == '-')
+ *u = '_';
+ ptr += string_to_llist(ptr, &info->dependencies, ",");
+ } else if (ENABLE_FEATURE_MODUTILS_ALIAS &&
+ strncmp(ptr, "alias=", 6) == 0) {
+ llist_add_to(&info->aliases, xstrdup(ptr + 6));
+ ptr += strlen(ptr);
+ } else if (ENABLE_FEATURE_MODUTILS_SYMBOLS &&
+ strncmp(ptr, "__ksymtab_", 10) == 0) {
+ ptr += 10;
+ if (strncmp(ptr, "gpl", 3) == 0 ||
+ strcmp(ptr, "strings") == 0)
+ continue;
+ llist_add_to(&info->symbols, xstrdup(ptr));
+ ptr += strlen(ptr);
}
- ++ptr;
- } while (1);
- return ptr;
+ }
+ free(image);
+
+ return TRUE;
}
-static int FAST_FUNC fileAction(const char *fname, struct stat *sb,
- void UNUSED_PARAM *data, int UNUSED_PARAM depth)
-{
- size_t len = sb->st_size;
- void *the_module;
- char *ptr;
- int fd;
- char *depends, *deps;
- dep_lst_t *this;
- if (strrstr(fname, ".ko") == NULL) /* not a module */
- goto skip;
+static module_info *find_module(module_info *modules, const char *modname)
+{
+ module_info *m;
-/*XXX: FIXME: does not handle compressed modules!
- * There should be a function that looks at the extension and sets up
- * open_transformer for us.
- */
- fd = xopen(fname, O_RDONLY);
- the_module = mmap(NULL, len, PROT_READ, MAP_SHARED
-#if defined MAP_POPULATE
- |MAP_POPULATE
-#endif
- , fd, 0);
- close(fd);
- if (the_module == MAP_FAILED)
- bb_perror_msg_and_die("mmap");
+ for (m = modules; m != NULL; m = m->next)
+ if (strcmp(m->modname, modname) == 0)
+ return m;
+ return NULL;
+}
- this = xzalloc(sizeof(dep_lst_t));
- this->name = xstrdup(fname);
- this->next = G.lst;
- G.lst = this;
-//bb_info_msg("fname='%s'", fname);
- ptr = find_keyword(the_module, len, "depends=");
- if (!*ptr)
- goto d_none;
- deps = depends = xstrdup(ptr);
-//bb_info_msg(" depends='%s'", depends);
- while (deps) {
- ptr = strsep(&deps, ",");
-//bb_info_msg("[%s] -> '%s'", fname, (char*)ptr);
- llist_add_to_end(&this->dependencies, xstrdup(ptr));
- }
- free(depends);
- d_none:
- if (ENABLE_FEATURE_DEPMOD_ALIAS)
- {
- size_t pos = 0;
- do {
- ptr = find_keyword(the_module + pos, len - pos, "alias=");
- if (ptr) {
-//bb_info_msg("[%s] alias '%s'", fname, (char*)ptr);
- llist_add_to_end(&this->aliases, xstrdup(ptr));
- } else
- break;
- pos = (ptr - (char*)the_module);
- } while (1);
+static void order_dep_list(module_info *modules, module_info *start,
+ llist_t *add)
+{
+ module_info *m;
+ llist_t *n;
+
+ for (n = add; n != NULL; n = n->link) {
+ m = find_module(modules, n->data);
+ if (m == NULL)
+ continue;
+
+ /* unlink current entry */
+ m->dnext->dprev = m->dprev;
+ m->dprev->dnext = m->dnext;
+
+ /* and add it to tail */
+ m->dnext = start;
+ m->dprev = start->dprev;
+ start->dprev->dnext = m;
+ start->dprev = m;
+
+ /* recurse */
+ order_dep_list(modules, start, m->dependencies);
}
- munmap(the_module, sb->st_size);
- skip:
- return TRUE;
}
int depmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int depmod_main(int argc UNUSED_PARAM, char **argv)
{
- int ret;
- size_t moddir_base_len = 0; /* length of the "-b basedir" */
- char *moddir_base = NULL, *moddir, *system_map, *chp;
- FILE *filedes = stdout;
- enum {
- ARG_a = (1<<0), /* All modules, ignore mods in argv */
- ARG_A = (1<<1), /* Only emit .ko that are newer than modules.dep file */
- ARG_b = (1<<2), /* not /lib/modules/$(uname -r)/ but this base-dir */
- ARG_e = (1<<3), /* with -F, print unresolved symbols */
- ARG_F = (1<<4), /* System.map that contains the symbols */
- ARG_n = (1<<5) /* dry-run, print to stdout only */
- };
- INIT_G();
+ module_info *modules = NULL, *m, *dep;
+ char *moddir_base = (char *)CONFIG_DEFAULT_MODULES_DIR;
+ int tmp;
- getopt32(argv, "aAb:eF:n", &moddir_base, &system_map);
+ getopt32(argv, "aAb:eF:n", &moddir_base, NULL);
argv += optind;
- /* If a version is provided, then that kernel version’s module directory
+ /* goto modules location */
+
+ /* If a version is provided, then that kernel version's module directory
* is used, rather than the current kernel version (as returned by
* "uname -r"). */
- if (*argv && (sscanf(*argv, "%d.%d.%d", &ret, &ret, &ret) == 3)) {
- moddir = concat_path_file(CONFIG_DEFAULT_MODULES_DIR, *argv++);
+ xchdir(moddir_base);
+ if (*argv && (sscanf(*argv, "%d.%d.%d", &tmp, &tmp, &tmp) == 3)) {
+ xchdir(*argv++);
} else {
struct utsname uts;
- if (uname(&uts) < 0)
- bb_simple_perror_msg_and_die("uname");
- moddir = concat_path_file(CONFIG_DEFAULT_MODULES_DIR, uts.release);
+ uname(&uts);
+ xchdir(uts.release);
}
/* If no modules are given on the command-line, -a is on per default. */
option_mask32 |= *argv == NULL;
- if (option_mask32 & ARG_b) {
- moddir_base_len = strlen(moddir_base) + 1;
- xchdir(moddir_base);
- }
-
- if (!(option_mask32 & ARG_n)) { /* --dry-run */
- chp = concat_path_file(moddir, CONFIG_DEFAULT_DEPMOD_FILE);
- filedes = xfopen_for_write(chp);
- if (ENABLE_FEATURE_CLEAN_UP)
- free(chp);
- }
- ret = EXIT_SUCCESS;
+ /* Scan modules */
+ moddir_base = xrealloc_getcwd_or_warn(NULL);
do {
- chp = option_mask32 & ARG_a ? moddir : (*argv + moddir_base_len);
-
- if (!recursive_action(chp,
- ACTION_RECURSE, /* flags */
- fileAction, /* file action */
- NULL, /* dir action */
- NULL, /* user data */
- 0)) { /* depth */
- ret = EXIT_FAILURE;
+ recursive_action((option_mask32 & ARG_a) ? moddir_base : *argv,
+ ACTION_RECURSE, parse_module, NULL, &modules, 0);
+ } while (!(option_mask32 & ARG_a) && *(++argv));
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(moddir_base);
+
+ /* Generate dependency and alias files */
+ if (!(option_mask32 & ARG_n))
+ freopen(CONFIG_DEFAULT_DEPMOD_FILE, "w", stdout);
+ for (m = modules; m != NULL; m = m->next) {
+ printf("%s:", m->name);
+
+ order_dep_list(modules, m, m->dependencies);
+ while (m->dnext != m) {
+ dep = m->dnext;
+ printf(" %s", dep->name);
+
+ /* unlink current entry */
+ dep->dnext->dprev = dep->dprev;
+ dep->dprev->dnext = dep->dnext;
+ dep->dnext = dep->dprev = dep;
}
- } while (!(option_mask32 & ARG_a) && *++argv);
-
- {
- dep_lst_t *mods = G.lst;
-
- /* Fixup the module names in the depends list */
- while (mods) {
- llist_t *deps = NULL, *old_deps = mods->dependencies;
-
- while (old_deps) {
- dep_lst_t *all = G.lst;
- char *longname = NULL;
- char *shortname = llist_pop(&old_deps);
-
- while (all) {
- char *nam =
- xstrdup(bb_get_last_path_component_nostrip(all->name));
- char *tmp = strrstr(nam, ".ko");
-
- *tmp = '\0';
- if (!strcmp(nam, shortname)) {
- if (ENABLE_FEATURE_CLEAN_UP)
- free(nam);
- longname = all->name;
- break;
- }
- free(nam);
- all = all->next;
- }
- llist_add_to_end(&deps, longname);
- }
- mods->dependencies = deps;
- mods = mods->next;
+ puts("");
}
-#if ENABLE_FEATURE_DEPMOD_PRUNE_FANCY
- /* modprobe allegedly wants dependencies without duplicates, i.e.
- * mod1: mod2 mod3
- * mod2: mod3
- * mod3:
- * implies that mod1 directly depends on mod2 and _not_ mod3 as mod3 is
- * already implicitely pulled in via mod2. This leaves us with:
- * mod1: mod2
- * mod2: mod3
- * mod3:
- */
- mods = G.lst;
- while (mods) {
- llist_t *deps = mods->dependencies;
- while (deps) {
- dep_lst_t *all = G.lst;
- while (all) {
- if (!strcmp(all->name, deps->data)) {
- llist_t *implied = all->dependencies;
- while (implied) {
- /* XXX:FIXME: erm, it would be nicer to just
- * llist_unlink(&mods->dependencies, implied) */
- llist_t *prune = mods->dependencies;
- while (prune) {
- if (!strcmp(implied->data, prune->data))
- break;
- prune = prune->link;
- }
-//if (prune) bb_info_msg("[%s] '%s' implies '%s', removing", mods->name, all->name, implied->data);
- llist_unlink(&mods->dependencies, prune);
- implied = implied->link;
- }
- }
- all = all->next;
- }
- deps = deps->link;
+#if ENABLE_FEATURE_MODUTILS_ALIAS
+ if (!(option_mask32 & ARG_n))
+ freopen("modules.alias", "w", stdout);
+ for (m = modules; m != NULL; m = m->next) {
+ while (m->aliases) {
+ printf("alias %s %s\n",
+ (char*)llist_pop(&m->aliases),
+ m->modname);
}
- mods = mods->next;
}
#endif
-
- mods = G.lst;
- /* Finally print them. */
- while (mods) {
- fprintf(filedes, "%s:", mods->name);
- /* If we did not resolve all modules, then it's likely that we just did
- * not see the names of all prerequisites (which will be NULL in this
- * case). */
- while (mods->dependencies) {
- char *the_dep = llist_pop(&mods->dependencies);
- if (the_dep)
- fprintf(filedes, " %s", the_dep);
- }
- fprintf(filedes, "\n");
- if (ENABLE_FEATURE_DEPMOD_ALIAS)
- {
- char *shortname =
- xstrdup(bb_get_last_path_component_nostrip(mods->name));
- char *tmp = strrstr(shortname, ".ko");
-
- *tmp = '\0';
-
- while (mods->aliases) {
- fprintf(filedes, "alias %s %s\n",
- (char*)llist_pop(&mods->aliases),
- shortname);
- }
- free(shortname);
+#if ENABLE_FEATURE_MODUTILS_SYMBOLS
+ if (!(option_mask32 & ARG_n))
+ freopen("modules.symbols", "w", stdout);
+ for (m = modules; m != NULL; m = m->next) {
+ while (m->symbols) {
+ printf("alias symbol:%s %s\n",
+ (char*)llist_pop(&m->symbols),
+ m->modname);
}
- mods = mods->next;
- }
}
+#endif
if (ENABLE_FEATURE_CLEAN_UP) {
- fclose_if_not_stdin(filedes);
- free(moddir);
- while (G.lst) {
- dep_lst_t *old = G.lst;
- G.lst = G.lst->next;
+ while (modules) {
+ module_info *old = modules;
+ modules = modules->next;
free(old->name);
+ free(old->modname);
free(old);
}
}
- return ret;
+
+ return EXIT_SUCCESS;
}
/*
* Mini insmod implementation for busybox
*
- * This version of insmod supports ARM, CRIS, H8/300, x86, ia64, x86_64,
- * m68k, MIPS, PowerPC, S390, SH3/4/5, Sparc, v850e, and x86_64.
+ * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
*
- * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
- * and Ron Alder <alder@lineo.com>
- *
- * Rodney Radford <rradford@mindspring.com> 17-Aug-2004.
- * Added x86_64 support.
- *
- * Miles Bader <miles@gnu.org> added NEC V850E support.
- *
- * Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4
- * and (theoretically) SH3. I have only tested SH4 in little endian mode.
- *
- * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
- * Nicolas Ferre <nicolas.ferre@alcove.fr> to support ARM7TDMI. Only
- * very minor changes required to also work with StrongArm and presumably
- * all ARM based systems.
- *
- * Yoshinori Sato <ysato@users.sourceforge.jp> 19-May-2004.
- * added Renesas H8/300 support.
- *
- * Paul Mundt <lethal@linux-sh.org> 08-Aug-2003.
- * Integrated support for sh64 (SH-5), from preliminary modutils
- * patches from Benedict Gaster <benedict.gaster@superh.com>.
- * Currently limited to support for 32bit ABI.
- *
- * Magnus Damm <damm@opensource.se> 22-May-2002.
- * The plt and got code are now using the same structs.
- * Added generic linked list code to fully support PowerPC.
- * Replaced the mess in arch_apply_relocation() with architecture blocks.
- * The arch_create_got() function got cleaned up with architecture blocks.
- * These blocks should be easy maintain and sync with obj_xxx.c in modutils.
- *
- * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001.
- * PowerPC specific code stolen from modutils-2.3.16,
- * written by Paul Mackerras, Copyright 1996, 1997 Linux International.
- * I've only tested the code on mpc8xx platforms in big-endian mode.
- * Did some cleanup and added USE_xxx_ENTRIES...
- *
- * Quinn Jensen <jensenq@lineo.com> added MIPS support 23-Feb-2001.
- * based on modutils-2.4.2
- * MIPS specific support for Elf loading and relocation.
- * Copyright 1996, 1997 Linux International.
- * Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu>
- *
- * Based almost entirely on the Linux modutils-2.3.11 implementation.
- * Copyright 1996, 1997 Linux International.
- * New implementation contributed by Richard Henderson <rth@tamu.edu>
- * Based on original work by Bjorn Ekwall <bj0rn@blox.se>
- * Restructured (and partly rewritten) by:
- * Björn Ekwall <bj0rn@blox.se> February 1999
- *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- */
-
-#include "libbb.h"
-#include <libgen.h>
-#include <sys/utsname.h>
-
-#if !ENABLE_FEATURE_2_4_MODULES && !ENABLE_FEATURE_2_6_MODULES
-#undef ENABLE_FEATURE_2_4_MODULES
-#define ENABLE_FEATURE_2_4_MODULES 1
-#endif
-
-/*
- * Big piece of 2.4-specific code
- */
-#if ENABLE_FEATURE_2_4_MODULES
-
-#if ENABLE_FEATURE_2_6_MODULES
-static int insmod_ng_main(int argc, char **argv);
-#endif
-
-#if ENABLE_FEATURE_INSMOD_LOADINKMEM
-#define LOADBITS 0
-#else
-#define LOADBITS 1
-#endif
-
-/* Alpha */
-#if defined(__alpha__)
-#define MATCH_MACHINE(x) (x == EM_ALPHA)
-#define SHT_RELM SHT_RELA
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#endif
-
-/* ARM support */
-#if defined(__arm__)
-#define MATCH_MACHINE(x) (x == EM_ARM)
-#define SHT_RELM SHT_REL
-#define Elf32_RelM Elf32_Rel
-#define ELFCLASSM ELFCLASS32
-#define USE_PLT_ENTRIES
-#define PLT_ENTRY_SIZE 8
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 8
-#define USE_SINGLE
-#endif
-
-/* blackfin */
-#if defined(BFIN)
-#define MATCH_MACHINE(x) (x == EM_BLACKFIN)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-
-/* CRIS */
-#if defined(__cris__)
-#define MATCH_MACHINE(x) (x == EM_CRIS)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#ifndef EM_CRIS
-#define EM_CRIS 76
-#define R_CRIS_NONE 0
-#define R_CRIS_32 3
-#endif
-#endif
-
-/* H8/300 */
-#if defined(__H8300H__) || defined(__H8300S__)
-#define MATCH_MACHINE(x) (x == EM_H8_300)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_SINGLE
-#define SYMBOL_PREFIX "_"
-#endif
-
-/* PA-RISC / HP-PA */
-#if defined(__hppa__)
-#define MATCH_MACHINE(x) (x == EM_PARISC)
-#define SHT_RELM SHT_RELA
-#if defined(__LP64__)
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#else
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-#endif
-
-/* x86 */
-#if defined(__i386__)
-#ifndef EM_486
-#define MATCH_MACHINE(x) (x == EM_386)
-#else
-#define MATCH_MACHINE(x) (x == EM_386 || x == EM_486)
-#endif
-#define SHT_RELM SHT_REL
-#define Elf32_RelM Elf32_Rel
-#define ELFCLASSM ELFCLASS32
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 4
-#define USE_SINGLE
-#endif
-
-/* IA64, aka Itanium */
-#if defined(__ia64__)
-#define MATCH_MACHINE(x) (x == EM_IA_64)
-#define SHT_RELM SHT_RELA
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#endif
-
-/* m68k */
-#if defined(__mc68000__)
-#define MATCH_MACHINE(x) (x == EM_68K)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 4
-#define USE_SINGLE
-#endif
-
-/* Microblaze */
-#if defined(__microblaze__)
-#define USE_SINGLE
-#include <linux/elf-em.h>
-#define MATCH_MACHINE(x) (x == EM_XILINX_MICROBLAZE)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-
-/* MIPS */
-#if defined(__mips__)
-#define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE)
-#define SHT_RELM SHT_REL
-#define Elf32_RelM Elf32_Rel
-#define ELFCLASSM ELFCLASS32
-/* Account for ELF spec changes. */
-#ifndef EM_MIPS_RS3_LE
-#ifdef EM_MIPS_RS4_BE
-#define EM_MIPS_RS3_LE EM_MIPS_RS4_BE
-#else
-#define EM_MIPS_RS3_LE 10
-#endif
-#endif /* !EM_MIPS_RS3_LE */
-#define ARCHDATAM "__dbe_table"
-#endif
-
-/* Nios II */
-#if defined(__nios2__)
-#define MATCH_MACHINE(x) (x == EM_ALTERA_NIOS2)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-
-/* PowerPC */
-#if defined(__powerpc64__)
-#define MATCH_MACHINE(x) (x == EM_PPC64)
-#define SHT_RELM SHT_RELA
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#elif defined(__powerpc__)
-#define MATCH_MACHINE(x) (x == EM_PPC)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_PLT_ENTRIES
-#define PLT_ENTRY_SIZE 16
-#define USE_PLT_LIST
-#define LIST_ARCHTYPE ElfW(Addr)
-#define USE_LIST
-#define ARCHDATAM "__ftr_fixup"
-#endif
-
-/* S390 */
-#if defined(__s390__)
-#define MATCH_MACHINE(x) (x == EM_S390)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_PLT_ENTRIES
-#define PLT_ENTRY_SIZE 8
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 8
-#define USE_SINGLE
-#endif
-
-/* SuperH */
-#if defined(__sh__)
-#define MATCH_MACHINE(x) (x == EM_SH)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 4
-#define USE_SINGLE
-#endif
-
-/* Sparc */
-#if defined(__sparc__)
-#define MATCH_MACHINE(x) (x == EM_SPARC)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-
-/* v850e */
-#if defined(__v850e__)
-#define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_PLT_ENTRIES
-#define PLT_ENTRY_SIZE 8
-#define USE_SINGLE
-#ifndef EM_CYGNUS_V850 /* grumble */
-#define EM_CYGNUS_V850 0x9080
-#endif
-#define SYMBOL_PREFIX "_"
-#endif
-
-/* X86_64 */
-#if defined(__x86_64__)
-#define MATCH_MACHINE(x) (x == EM_X86_64)
-#define SHT_RELM SHT_RELA
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 8
-#define USE_SINGLE
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#endif
-
-#ifndef SHT_RELM
-#error Sorry, but insmod.c does not yet support this architecture...
-#endif
-
-
-//----------------------------------------------------------------------------
-//--------modutils module.h, lines 45-242
-//----------------------------------------------------------------------------
-
-/* Definitions for the Linux module syscall interface.
- Copyright 1996, 1997 Linux International.
-
- Contributed by Richard Henderson <rth@tamu.edu>
-
- This file is part of the Linux modutils.
-
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2 of the License, or (at your
- option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-
-#ifndef MODUTILS_MODULE_H
-
-/*======================================================================*/
-/* For sizeof() which are related to the module platform and not to the
- environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */
-
-#define tgt_sizeof_char sizeof(char)
-#define tgt_sizeof_short sizeof(short)
-#define tgt_sizeof_int sizeof(int)
-#define tgt_sizeof_long sizeof(long)
-#define tgt_sizeof_char_p sizeof(char *)
-#define tgt_sizeof_void_p sizeof(void *)
-#define tgt_long long
-
-#if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64)
-#undef tgt_sizeof_long
-#undef tgt_sizeof_char_p
-#undef tgt_sizeof_void_p
-#undef tgt_long
-enum {
- tgt_sizeof_long = 8,
- tgt_sizeof_char_p = 8,
- tgt_sizeof_void_p = 8
-};
-#define tgt_long long long
-#endif
-
-/*======================================================================*/
-/* The structures used in Linux 2.1. */
-
-/* Note: new_module_symbol does not use tgt_long intentionally */
-struct new_module_symbol {
- unsigned long value;
- unsigned long name;
-};
-
-struct new_module_persist;
-
-struct new_module_ref {
- unsigned tgt_long dep; /* kernel addresses */
- unsigned tgt_long ref;
- unsigned tgt_long next_ref;
-};
-
-struct new_module {
- unsigned tgt_long size_of_struct; /* == sizeof(module) */
- unsigned tgt_long next;
- unsigned tgt_long name;
- unsigned tgt_long size;
-
- tgt_long usecount;
- unsigned tgt_long flags; /* AUTOCLEAN et al */
-
- unsigned nsyms;
- unsigned ndeps;
-
- unsigned tgt_long syms;
- unsigned tgt_long deps;
- unsigned tgt_long refs;
- unsigned tgt_long init;
- unsigned tgt_long cleanup;
- unsigned tgt_long ex_table_start;
- unsigned tgt_long ex_table_end;
-#ifdef __alpha__
- unsigned tgt_long gp;
-#endif
- /* Everything after here is extension. */
- unsigned tgt_long persist_start;
- unsigned tgt_long persist_end;
- unsigned tgt_long can_unload;
- unsigned tgt_long runsize;
- const char *kallsyms_start; /* All symbols for kernel debugging */
- const char *kallsyms_end;
- const char *archdata_start; /* arch specific data for module */
- const char *archdata_end;
- const char *kernel_data; /* Reserved for kernel internal use */
-};
-
-#ifdef ARCHDATAM
-#define ARCHDATA_SEC_NAME ARCHDATAM
-#else
-#define ARCHDATA_SEC_NAME "__archdata"
-#endif
-#define KALLSYMS_SEC_NAME "__kallsyms"
-
-
-struct new_module_info {
- unsigned long addr;
- unsigned long size;
- unsigned long flags;
- long usecount;
-};
-
-/* Bits of module.flags. */
-enum {
- NEW_MOD_RUNNING = 1,
- NEW_MOD_DELETED = 2,
- NEW_MOD_AUTOCLEAN = 4,
- NEW_MOD_VISITED = 8,
- NEW_MOD_USED_ONCE = 16
-};
-
-int init_module(const char *name, const struct new_module *);
-int query_module(const char *name, int which, void *buf,
- size_t bufsize, size_t *ret);
-
-/* Values for query_module's which. */
-enum {
- QM_MODULES = 1,
- QM_DEPS = 2,
- QM_REFS = 3,
- QM_SYMBOLS = 4,
- QM_INFO = 5
-};
-
-/*======================================================================*/
-/* The system calls unchanged between 2.0 and 2.1. */
-
-unsigned long create_module(const char *, size_t);
-int delete_module(const char *module, unsigned int flags);
-
-
-#endif /* module.h */
-
-//----------------------------------------------------------------------------
-//--------end of modutils module.h
-//----------------------------------------------------------------------------
-
-
-
-//----------------------------------------------------------------------------
-//--------modutils obj.h, lines 253-462
-//----------------------------------------------------------------------------
-
-/* Elf object file loading and relocation routines.
- Copyright 1996, 1997 Linux International.
-
- Contributed by Richard Henderson <rth@tamu.edu>
-
- This file is part of the Linux modutils.
-
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2 of the License, or (at your
- option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-
-#ifndef MODUTILS_OBJ_H
-
-/* The relocatable object is manipulated using elfin types. */
-
-#include <elf.h>
-#include <endian.h>
-
-#ifndef ElfW
-# if ELFCLASSM == ELFCLASS32
-# define ElfW(x) Elf32_ ## x
-# define ELFW(x) ELF32_ ## x
-# else
-# define ElfW(x) Elf64_ ## x
-# define ELFW(x) ELF64_ ## x
-# endif
-#endif
-
-/* For some reason this is missing from some ancient C libraries.... */
-#ifndef ELF32_ST_INFO
-# define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
-#endif
-
-#ifndef ELF64_ST_INFO
-# define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
-#endif
-
-#define ELF_ST_BIND(info) ELFW(ST_BIND)(info)
-#define ELF_ST_TYPE(info) ELFW(ST_TYPE)(info)
-#define ELF_ST_INFO(bind, type) ELFW(ST_INFO)(bind, type)
-#define ELF_R_TYPE(val) ELFW(R_TYPE)(val)
-#define ELF_R_SYM(val) ELFW(R_SYM)(val)
-
-struct obj_string_patch;
-struct obj_symbol_patch;
-
-struct obj_section
-{
- ElfW(Shdr) header;
- const char *name;
- char *contents;
- struct obj_section *load_next;
- int idx;
-};
-
-struct obj_symbol
-{
- struct obj_symbol *next; /* hash table link */
- const char *name;
- unsigned long value;
- unsigned long size;
- int secidx; /* the defining section index/module */
- int info;
- int ksymidx; /* for export to the kernel symtab */
- int referenced; /* actually used in the link */
-};
-
-/* Hardcode the hash table size. We shouldn't be needing so many
- symbols that we begin to degrade performance, and we get a big win
- by giving the compiler a constant divisor. */
-
-#define HASH_BUCKETS 521
-
-struct obj_file {
- ElfW(Ehdr) header;
- ElfW(Addr) baseaddr;
- struct obj_section **sections;
- struct obj_section *load_order;
- struct obj_section **load_order_search_start;
- struct obj_string_patch *string_patches;
- struct obj_symbol_patch *symbol_patches;
- int (*symbol_cmp)(const char *, const char *);
- unsigned long (*symbol_hash)(const char *);
- unsigned long local_symtab_size;
- struct obj_symbol **local_symtab;
- struct obj_symbol *symtab[HASH_BUCKETS];
-};
-
-enum obj_reloc {
- obj_reloc_ok,
- obj_reloc_overflow,
- obj_reloc_dangerous,
- obj_reloc_unhandled
-};
-
-struct obj_string_patch {
- struct obj_string_patch *next;
- int reloc_secidx;
- ElfW(Addr) reloc_offset;
- ElfW(Addr) string_offset;
-};
-
-struct obj_symbol_patch {
- struct obj_symbol_patch *next;
- int reloc_secidx;
- ElfW(Addr) reloc_offset;
- struct obj_symbol *sym;
-};
-
-
-/* Generic object manipulation routines. */
-
-static unsigned long obj_elf_hash(const char *);
-
-static unsigned long obj_elf_hash_n(const char *, unsigned long len);
-
-static struct obj_symbol *obj_find_symbol(struct obj_file *f,
- const char *name);
-
-static ElfW(Addr) obj_symbol_final_value(struct obj_file *f,
- struct obj_symbol *sym);
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
-static void obj_set_symbol_compare(struct obj_file *f,
- int (*cmp)(const char *, const char *),
- unsigned long (*hash)(const char *));
-#endif
-
-static struct obj_section *obj_find_section(struct obj_file *f,
- const char *name);
-
-static void obj_insert_section_load_order(struct obj_file *f,
- struct obj_section *sec);
-
-static struct obj_section *obj_create_alloced_section(struct obj_file *f,
- const char *name,
- unsigned long align,
- unsigned long size);
-
-static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
- const char *name,
- unsigned long align,
- unsigned long size);
-
-static void *obj_extend_section(struct obj_section *sec, unsigned long more);
-
-static void obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
- const char *string);
-
-static void obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
- struct obj_symbol *sym);
-
-static void obj_check_undefineds(struct obj_file *f);
-
-static void obj_allocate_commons(struct obj_file *f);
-
-static unsigned long obj_load_size(struct obj_file *f);
-
-static int obj_relocate(struct obj_file *f, ElfW(Addr) base);
-
-static struct obj_file *obj_load(FILE *f, int loadprogbits);
-
-static int obj_create_image(struct obj_file *f, char *image);
-
-/* Architecture specific manipulation routines. */
-
-static struct obj_file *arch_new_file(void);
-
-static struct obj_section *arch_new_section(void);
-
-static struct obj_symbol *arch_new_symbol(void);
-
-static enum obj_reloc arch_apply_relocation(struct obj_file *f,
- struct obj_section *targsec,
- /*struct obj_section *symsec,*/
- struct obj_symbol *sym,
- ElfW(RelM) *rel, ElfW(Addr) value);
-
-static void arch_create_got(struct obj_file *f);
-#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
-static int obj_gpl_license(struct obj_file *f, const char **license);
-#endif /* FEATURE_CHECK_TAINTED_MODULE */
-#endif /* obj.h */
-//----------------------------------------------------------------------------
-//--------end of modutils obj.h
-//----------------------------------------------------------------------------
-
-
-/* SPFX is always a string, so it can be concatenated to string constants. */
-#ifdef SYMBOL_PREFIX
-#define SPFX SYMBOL_PREFIX
-#else
-#define SPFX ""
-#endif
-
-enum { STRVERSIONLEN = 64 };
-
-/*======================================================================*/
-
-#define OPTION_STR "sLo:fkvqx" USE_FEATURE_INSMOD_LOAD_MAP("m")
-enum {
- OPT_s = 0x1, // -s /* log to syslog */
- /* Not supported but kernel needs this for request_module(),
- as this calls: modprobe -k -s -- <module>
- so silently ignore this flag */
- OPT_L = 0x2, // -L /* Stub warning */
- /* Compatibility with modprobe.
- In theory, this does locking, but we don't do
- that. So be careful and plan your life around not
- loading the same module 50 times concurrently. */
- OPT_o = 0x4, // -o /* name the output module */
- OPT_f = 0x8, // -f /* force loading */
- OPT_k = 0x10, // -k /* module loaded by kerneld, auto-cleanable */
- OPT_v = 0x20, // -v /* verbose output */
- OPT_q = 0x40, // -q /* silent */
- OPT_x = 0x80, // -x /* do not export externs */
- OPT_m = 0x100, // -m /* print module load map */
-};
-#define flag_force_load (option_mask32 & OPT_f)
-#define flag_autoclean (option_mask32 & OPT_k)
-#define flag_verbose (option_mask32 & OPT_v)
-#define flag_quiet (option_mask32 & OPT_q)
-#define flag_noexport (option_mask32 & OPT_x)
-#if ENABLE_FEATURE_INSMOD_LOAD_MAP
-#define flag_print_load_map (option_mask32 & OPT_m)
-#else
-#define flag_print_load_map 0
-#endif
-
-/*======================================================================*/
-
-#if defined(USE_LIST)
-
-struct arch_list_entry
-{
- struct arch_list_entry *next;
- LIST_ARCHTYPE addend;
- int offset;
- int inited : 1;
-};
-
-#endif
-
-#if defined(USE_SINGLE)
-
-struct arch_single_entry
-{
- int offset;
- int inited : 1;
- int allocated : 1;
-};
-
-#endif
-
-#if defined(__mips__)
-struct mips_hi16
-{
- struct mips_hi16 *next;
- ElfW(Addr) *addr;
- ElfW(Addr) value;
-};
-#endif
-
-struct arch_file {
- struct obj_file root;
-#if defined(USE_PLT_ENTRIES)
- struct obj_section *plt;
-#endif
-#if defined(USE_GOT_ENTRIES)
- struct obj_section *got;
-#endif
-#if defined(__mips__)
- struct mips_hi16 *mips_hi16_list;
-#endif
-};
-
-struct arch_symbol {
- struct obj_symbol root;
-#if defined(USE_PLT_ENTRIES)
-#if defined(USE_PLT_LIST)
- struct arch_list_entry *pltent;
-#else
- struct arch_single_entry pltent;
-#endif
-#endif
-#if defined(USE_GOT_ENTRIES)
- struct arch_single_entry gotent;
-#endif
-};
-
-
-struct external_module {
- const char *name;
- ElfW(Addr) addr;
- int used;
- size_t nsyms;
- struct new_module_symbol *syms;
-};
-
-static struct new_module_symbol *ksyms;
-static size_t nksyms;
-
-static struct external_module *ext_modules;
-static int n_ext_modules;
-static int n_ext_modules_used;
-
-static char *m_filename;
-static char *m_fullName;
-
-
-/*======================================================================*/
-
-
-static int FAST_FUNC check_module_name_match(const char *filename,
- struct stat *statbuf UNUSED_PARAM,
- void *userdata, int depth UNUSED_PARAM)
-{
- char *fullname = (char *) userdata;
- char *tmp;
-
- if (fullname[0] == '\0')
- return FALSE;
-
- tmp = bb_get_last_path_component_nostrip(filename);
- if (strcmp(tmp, fullname) == 0) {
- /* Stop searching if we find a match */
- m_filename = xstrdup(filename);
- return FALSE;
- }
- return TRUE;
-}
-
-
-/*======================================================================*/
-
-static struct obj_file *arch_new_file(void)
-{
- struct arch_file *f;
- f = xzalloc(sizeof(*f));
- return &f->root; /* it's a first member */
-}
-
-static struct obj_section *arch_new_section(void)
-{
- return xzalloc(sizeof(struct obj_section));
-}
-
-static struct obj_symbol *arch_new_symbol(void)
-{
- struct arch_symbol *sym;
- sym = xzalloc(sizeof(*sym));
- return &sym->root;
-}
-
-static enum obj_reloc
-arch_apply_relocation(struct obj_file *f,
- struct obj_section *targsec,
- /*struct obj_section *symsec,*/
- struct obj_symbol *sym,
- ElfW(RelM) *rel, ElfW(Addr) v)
-{
-#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) \
- || defined(__sh__) || defined(__s390__) || defined(__x86_64__) \
- || defined(__powerpc__) || defined(__mips__)
- struct arch_file *ifile = (struct arch_file *) f;
-#endif
- enum obj_reloc ret = obj_reloc_ok;
- ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset);
-#if defined(__arm__) || defined(__H8300H__) || defined(__H8300S__) \
- || defined(__i386__) || defined(__mc68000__) || defined(__microblaze__) \
- || defined(__mips__) || defined(__nios2__) || defined(__powerpc__) \
- || defined(__s390__) || defined(__sh__) || defined(__x86_64__)
- ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset;
-#endif
-#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
- struct arch_symbol *isym = (struct arch_symbol *) sym;
-#endif
-#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) \
- || defined(__sh__) || defined(__s390__)
-#if defined(USE_GOT_ENTRIES)
- ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0;
-#endif
-#endif
-#if defined(USE_PLT_ENTRIES)
- ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
- unsigned long *ip;
-# if defined(USE_PLT_LIST)
- struct arch_list_entry *pe;
-# else
- struct arch_single_entry *pe;
-# endif
-#endif
-
- switch (ELF_R_TYPE(rel->r_info)) {
-
-#if defined(__arm__)
-
- case R_ARM_NONE:
- break;
-
- case R_ARM_ABS32:
- *loc += v;
- break;
-
- case R_ARM_GOT32:
- goto bb_use_got;
-
- case R_ARM_GOTPC:
- /* relative reloc, always to _GLOBAL_OFFSET_TABLE_
- * (which is .got) similar to branch,
- * but is full 32 bits relative */
-
- *loc += got - dot;
- break;
-
- case R_ARM_PC24:
- case R_ARM_PLT32:
- goto bb_use_plt;
-
- case R_ARM_GOTOFF: /* address relative to the got */
- *loc += v - got;
- break;
-
-#elif defined(__cris__)
-
- case R_CRIS_NONE:
- break;
-
- case R_CRIS_32:
- /* CRIS keeps the relocation value in the r_addend field and
- * should not use whats in *loc at all
- */
- *loc = v;
- break;
-
-#elif defined(__H8300H__) || defined(__H8300S__)
-
- case R_H8_DIR24R8:
- loc = (ElfW(Addr) *)((ElfW(Addr))loc - 1);
- *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v);
- break;
- case R_H8_DIR24A8:
- *loc += v;
- break;
- case R_H8_DIR32:
- case R_H8_DIR32A16:
- *loc += v;
- break;
- case R_H8_PCREL16:
- v -= dot + 2;
- if ((ElfW(Sword))v > 0x7fff ||
- (ElfW(Sword))v < -(ElfW(Sword))0x8000)
- ret = obj_reloc_overflow;
- else
- *(unsigned short *)loc = v;
- break;
- case R_H8_PCREL8:
- v -= dot + 1;
- if ((ElfW(Sword))v > 0x7f ||
- (ElfW(Sword))v < -(ElfW(Sword))0x80)
- ret = obj_reloc_overflow;
- else
- *(unsigned char *)loc = v;
- break;
-
-#elif defined(__i386__)
-
- case R_386_NONE:
- break;
-
- case R_386_32:
- *loc += v;
- break;
-
- case R_386_PLT32:
- case R_386_PC32:
- case R_386_GOTOFF:
- *loc += v - dot;
- break;
-
- case R_386_GLOB_DAT:
- case R_386_JMP_SLOT:
- *loc = v;
- break;
-
- case R_386_RELATIVE:
- *loc += f->baseaddr;
- break;
-
- case R_386_GOTPC:
- *loc += got - dot;
- break;
-
- case R_386_GOT32:
- goto bb_use_got;
- break;
-
-#elif defined(__microblaze__)
- case R_MICROBLAZE_NONE:
- case R_MICROBLAZE_64_NONE:
- case R_MICROBLAZE_32_SYM_OP_SYM:
- case R_MICROBLAZE_32_PCREL:
- break;
-
- case R_MICROBLAZE_64_PCREL: {
- /* dot is the address of the current instruction.
- * v is the target symbol address.
- * So we need to extract the offset in the code,
- * adding v, then subtrating the current address
- * of this instruction.
- * Ex: "IMM 0xFFFE bralid 0x0000" = "bralid 0xFFFE0000"
- */
-
- /* Get split offset stored in code */
- unsigned int temp = (loc[0] & 0xFFFF) << 16 |
- (loc[1] & 0xFFFF);
-
- /* Adjust relative offset. -4 adjustment required
- * because dot points to the IMM insn, but branch
- * is computed relative to the branch instruction itself.
- */
- temp += v - dot - 4;
-
- /* Store back into code */
- loc[0] = (loc[0] & 0xFFFF0000) | temp >> 16;
- loc[1] = (loc[1] & 0xFFFF0000) | (temp & 0xFFFF);
-
- break;
- }
-
- case R_MICROBLAZE_32:
- *loc += v;
- break;
-
- case R_MICROBLAZE_64: {
- /* Get split pointer stored in code */
- unsigned int temp1 = (loc[0] & 0xFFFF) << 16 |
- (loc[1] & 0xFFFF);
-
- /* Add reloc offset */
- temp1+=v;
-
- /* Store back into code */
- loc[0] = (loc[0] & 0xFFFF0000) | temp1 >> 16;
- loc[1] = (loc[1] & 0xFFFF0000) | (temp1 & 0xFFFF);
-
- break;
- }
-
- case R_MICROBLAZE_32_PCREL_LO:
- case R_MICROBLAZE_32_LO:
- case R_MICROBLAZE_SRO32:
- case R_MICROBLAZE_SRW32:
- ret = obj_reloc_unhandled;
- break;
-
-#elif defined(__mc68000__)
-
- case R_68K_NONE:
- break;
-
- case R_68K_32:
- *loc += v;
- break;
-
- case R_68K_8:
- if (v > 0xff) {
- ret = obj_reloc_overflow;
- }
- *(char *)loc = v;
- break;
-
- case R_68K_16:
- if (v > 0xffff) {
- ret = obj_reloc_overflow;
- }
- *(short *)loc = v;
- break;
-
- case R_68K_PC8:
- v -= dot;
- if ((ElfW(Sword))v > 0x7f
- || (ElfW(Sword))v < -(ElfW(Sword))0x80
- ) {
- ret = obj_reloc_overflow;
- }
- *(char *)loc = v;
- break;
-
- case R_68K_PC16:
- v -= dot;
- if ((ElfW(Sword))v > 0x7fff
- || (ElfW(Sword))v < -(ElfW(Sword))0x8000
- ) {
- ret = obj_reloc_overflow;
- }
- *(short *)loc = v;
- break;
-
- case R_68K_PC32:
- *(int *)loc = v - dot;
- break;
-
- case R_68K_GLOB_DAT:
- case R_68K_JMP_SLOT:
- *loc = v;
- break;
-
- case R_68K_RELATIVE:
- *(int *)loc += f->baseaddr;
- break;
-
- case R_68K_GOT32:
- goto bb_use_got;
-
-# ifdef R_68K_GOTOFF
- case R_68K_GOTOFF:
- *loc += v - got;
- break;
-# endif
-
-#elif defined(__mips__)
-
- case R_MIPS_NONE:
- break;
-
- case R_MIPS_32:
- *loc += v;
- break;
-
- case R_MIPS_26:
- if (v % 4)
- ret = obj_reloc_dangerous;
- if ((v & 0xf0000000) != ((dot + 4) & 0xf0000000))
- ret = obj_reloc_overflow;
- *loc =
- (*loc & ~0x03ffffff) | ((*loc + (v >> 2)) &
- 0x03ffffff);
- break;
-
- case R_MIPS_HI16:
- {
- struct mips_hi16 *n;
-
- /* We cannot relocate this one now because we don't know the value
- of the carry we need to add. Save the information, and let LO16
- do the actual relocation. */
- n = xmalloc(sizeof *n);
- n->addr = loc;
- n->value = v;
- n->next = ifile->mips_hi16_list;
- ifile->mips_hi16_list = n;
- break;
- }
-
- case R_MIPS_LO16:
- {
- unsigned long insnlo = *loc;
- ElfW(Addr) val, vallo;
-
- /* Sign extend the addend we extract from the lo insn. */
- vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000;
-
- if (ifile->mips_hi16_list != NULL) {
- struct mips_hi16 *l;
-
- l = ifile->mips_hi16_list;
- while (l != NULL) {
- struct mips_hi16 *next;
- unsigned long insn;
-
- /* Do the HI16 relocation. Note that we actually don't
- need to know anything about the LO16 itself, except where
- to find the low 16 bits of the addend needed by the LO16. */
- insn = *l->addr;
- val =
- ((insn & 0xffff) << 16) +
- vallo;
- val += v;
-
- /* Account for the sign extension that will happen in the
- low bits. */
- val =
- ((val >> 16) +
- ((val & 0x8000) !=
- 0)) & 0xffff;
-
- insn = (insn & ~0xffff) | val;
- *l->addr = insn;
-
- next = l->next;
- free(l);
- l = next;
- }
-
- ifile->mips_hi16_list = NULL;
- }
-
- /* Ok, we're done with the HI16 relocs. Now deal with the LO16. */
- val = v + vallo;
- insnlo = (insnlo & ~0xffff) | (val & 0xffff);
- *loc = insnlo;
- break;
- }
-
-#elif defined(__nios2__)
-
- case R_NIOS2_NONE:
- break;
-
- case R_NIOS2_BFD_RELOC_32:
- *loc += v;
- break;
-
- case R_NIOS2_BFD_RELOC_16:
- if (v > 0xffff) {
- ret = obj_reloc_overflow;
- }
- *(short *)loc = v;
- break;
-
- case R_NIOS2_BFD_RELOC_8:
- if (v > 0xff) {
- ret = obj_reloc_overflow;
- }
- *(char *)loc = v;
- break;
-
- case R_NIOS2_S16:
- {
- Elf32_Addr word;
-
- if ((Elf32_Sword)v > 0x7fff
- || (Elf32_Sword)v < -(Elf32_Sword)0x8000
- ) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
- (word & 0x3f);
- }
- break;
-
- case R_NIOS2_U16:
- {
- Elf32_Addr word;
-
- if (v > 0xffff) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
- (word & 0x3f);
- }
- break;
-
- case R_NIOS2_PCREL16:
- {
- Elf32_Addr word;
-
- v -= dot + 4;
- if ((Elf32_Sword)v > 0x7fff
- || (Elf32_Sword)v < -(Elf32_Sword)0x8000
- ) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
- }
- break;
-
- case R_NIOS2_GPREL:
- {
- Elf32_Addr word, gp;
- /* get _gp */
- gp = obj_symbol_final_value(f, obj_find_symbol(f, SPFX "_gp"));
- v -= gp;
- if ((Elf32_Sword)v > 0x7fff
- || (Elf32_Sword)v < -(Elf32_Sword)0x8000
- ) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
- }
- break;
-
- case R_NIOS2_CALL26:
- if (v & 3)
- ret = obj_reloc_dangerous;
- if ((v >> 28) != (dot >> 28))
- ret = obj_reloc_overflow;
- *loc = (*loc & 0x3f) | ((v >> 2) << 6);
- break;
-
- case R_NIOS2_IMM5:
- {
- Elf32_Addr word;
-
- if (v > 0x1f) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc & ~0x7c0;
- *loc = word | ((v & 0x1f) << 6);
- }
- break;
-
- case R_NIOS2_IMM6:
- {
- Elf32_Addr word;
-
- if (v > 0x3f) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc & ~0xfc0;
- *loc = word | ((v & 0x3f) << 6);
- }
- break;
-
- case R_NIOS2_IMM8:
- {
- Elf32_Addr word;
-
- if (v > 0xff) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc & ~0x3fc0;
- *loc = word | ((v & 0xff) << 6);
- }
- break;
-
- case R_NIOS2_HI16:
- {
- Elf32_Addr word;
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | ((v >>16) & 0xffff)) << 6) |
- (word & 0x3f);
- }
- break;
-
- case R_NIOS2_LO16:
- {
- Elf32_Addr word;
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
- (word & 0x3f);
- }
- break;
-
- case R_NIOS2_HIADJ16:
- {
- Elf32_Addr word1, word2;
-
- word1 = *loc;
- word2 = ((v >> 16) + ((v >> 15) & 1)) & 0xffff;
- *loc = ((((word1 >> 22) << 16) | word2) << 6) |
- (word1 & 0x3f);
- }
- break;
-
-#elif defined(__powerpc64__)
- /* PPC64 needs a 2.6 kernel, 2.4 module relocation irrelevant */
-
-#elif defined(__powerpc__)
-
- case R_PPC_ADDR16_HA:
- *(unsigned short *)loc = (v + 0x8000) >> 16;
- break;
-
- case R_PPC_ADDR16_HI:
- *(unsigned short *)loc = v >> 16;
- break;
-
- case R_PPC_ADDR16_LO:
- *(unsigned short *)loc = v;
- break;
-
- case R_PPC_REL24:
- goto bb_use_plt;
-
- case R_PPC_REL32:
- *loc = v - dot;
- break;
-
- case R_PPC_ADDR32:
- *loc = v;
- break;
-
-#elif defined(__s390__)
-
- case R_390_32:
- *(unsigned int *) loc += v;
- break;
- case R_390_16:
- *(unsigned short *) loc += v;
- break;
- case R_390_8:
- *(unsigned char *) loc += v;
- break;
-
- case R_390_PC32:
- *(unsigned int *) loc += v - dot;
- break;
- case R_390_PC16DBL:
- *(unsigned short *) loc += (v - dot) >> 1;
- break;
- case R_390_PC16:
- *(unsigned short *) loc += v - dot;
- break;
-
- case R_390_PLT32:
- case R_390_PLT16DBL:
- /* find the plt entry and initialize it. */
- pe = (struct arch_single_entry *) &isym->pltent;
- if (pe->inited == 0) {
- ip = (unsigned long *)(ifile->plt->contents + pe->offset);
- ip[0] = 0x0d105810; /* basr 1,0; lg 1,10(1); br 1 */
- ip[1] = 0x100607f1;
- if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
- ip[2] = v - 2;
- else
- ip[2] = v;
- pe->inited = 1;
- }
-
- /* Insert relative distance to target. */
- v = plt + pe->offset - dot;
- if (ELF_R_TYPE(rel->r_info) == R_390_PLT32)
- *(unsigned int *) loc = (unsigned int) v;
- else if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
- *(unsigned short *) loc = (unsigned short) ((v + 2) >> 1);
- break;
-
- case R_390_GLOB_DAT:
- case R_390_JMP_SLOT:
- *loc = v;
- break;
-
- case R_390_RELATIVE:
- *loc += f->baseaddr;
- break;
-
- case R_390_GOTPC:
- *(unsigned long *) loc += got - dot;
- break;
-
- case R_390_GOT12:
- case R_390_GOT16:
- case R_390_GOT32:
- if (!isym->gotent.inited)
- {
- isym->gotent.inited = 1;
- *(ElfW(Addr) *)(ifile->got->contents + isym->gotent.offset) = v;
- }
- if (ELF_R_TYPE(rel->r_info) == R_390_GOT12)
- *(unsigned short *) loc |= (*(unsigned short *) loc + isym->gotent.offset) & 0xfff;
- else if (ELF_R_TYPE(rel->r_info) == R_390_GOT16)
- *(unsigned short *) loc += isym->gotent.offset;
- else if (ELF_R_TYPE(rel->r_info) == R_390_GOT32)
- *(unsigned int *) loc += isym->gotent.offset;
- break;
-
-# ifndef R_390_GOTOFF32
-# define R_390_GOTOFF32 R_390_GOTOFF
-# endif
- case R_390_GOTOFF32:
- *loc += v - got;
- break;
-
-#elif defined(__sh__)
-
- case R_SH_NONE:
- break;
-
- case R_SH_DIR32:
- *loc += v;
- break;
-
- case R_SH_REL32:
- *loc += v - dot;
- break;
-
- case R_SH_PLT32:
- *loc = v - dot;
- break;
-
- case R_SH_GLOB_DAT:
- case R_SH_JMP_SLOT:
- *loc = v;
- break;
-
- case R_SH_RELATIVE:
- *loc = f->baseaddr + rel->r_addend;
- break;
-
- case R_SH_GOTPC:
- *loc = got - dot + rel->r_addend;
- break;
-
- case R_SH_GOT32:
- goto bb_use_got;
-
- case R_SH_GOTOFF:
- *loc = v - got;
- break;
-
-# if defined(__SH5__)
- case R_SH_IMM_MEDLOW16:
- case R_SH_IMM_LOW16:
- {
- ElfW(Addr) word;
-
- if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16)
- v >>= 16;
-
- /*
- * movi and shori have the format:
- *
- * | op | imm | reg | reserved |
- * 31..26 25..10 9.. 4 3 .. 0
- *
- * so we simply mask and or in imm.
- */
- word = *loc & ~0x3fffc00;
- word |= (v & 0xffff) << 10;
-
- *loc = word;
-
- break;
- }
-
- case R_SH_IMM_MEDLOW16_PCREL:
- case R_SH_IMM_LOW16_PCREL:
- {
- ElfW(Addr) word;
-
- word = *loc & ~0x3fffc00;
-
- v -= dot;
-
- if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16_PCREL)
- v >>= 16;
-
- word |= (v & 0xffff) << 10;
-
- *loc = word;
-
- break;
- }
-# endif /* __SH5__ */
-
-#elif defined(__v850e__)
-
- case R_V850_NONE:
- break;
-
- case R_V850_32:
- /* We write two shorts instead of a long because even
- 32-bit insns only need half-word alignment, but
- 32-bit data needs to be long-word aligned. */
- v += ((unsigned short *)loc)[0];
- v += ((unsigned short *)loc)[1] << 16;
- ((unsigned short *)loc)[0] = v & 0xffff;
- ((unsigned short *)loc)[1] = (v >> 16) & 0xffff;
- break;
-
- case R_V850_22_PCREL:
- goto bb_use_plt;
-
-#elif defined(__x86_64__)
-
- case R_X86_64_NONE:
- break;
-
- case R_X86_64_64:
- *loc += v;
- break;
-
- case R_X86_64_32:
- *(unsigned int *) loc += v;
- if (v > 0xffffffff)
- {
- ret = obj_reloc_overflow; /* Kernel module compiled without -mcmodel=kernel. */
- /* error("Possibly is module compiled without -mcmodel=kernel!"); */
- }
- break;
-
- case R_X86_64_32S:
- *(signed int *) loc += v;
- break;
-
- case R_X86_64_16:
- *(unsigned short *) loc += v;
- break;
-
- case R_X86_64_8:
- *(unsigned char *) loc += v;
- break;
-
- case R_X86_64_PC32:
- *(unsigned int *) loc += v - dot;
- break;
-
- case R_X86_64_PC16:
- *(unsigned short *) loc += v - dot;
- break;
-
- case R_X86_64_PC8:
- *(unsigned char *) loc += v - dot;
- break;
-
- case R_X86_64_GLOB_DAT:
- case R_X86_64_JUMP_SLOT:
- *loc = v;
- break;
-
- case R_X86_64_RELATIVE:
- *loc += f->baseaddr;
- break;
-
- case R_X86_64_GOT32:
- case R_X86_64_GOTPCREL:
- goto bb_use_got;
-# if 0
- if (!isym->gotent.reloc_done)
- {
- isym->gotent.reloc_done = 1;
- *(Elf64_Addr *)(ifile->got->contents + isym->gotent.offset) = v;
- }
- /* XXX are these really correct? */
- if (ELF64_R_TYPE(rel->r_info) == R_X86_64_GOTPCREL)
- *(unsigned int *) loc += v + isym->gotent.offset;
- else
- *loc += isym->gotent.offset;
- break;
-# endif
-
-#else
-# warning "no idea how to handle relocations on your arch"
-#endif
-
- default:
- printf("Warning: unhandled reloc %d\n",(int)ELF_R_TYPE(rel->r_info));
- ret = obj_reloc_unhandled;
- break;
-
-#if defined(USE_PLT_ENTRIES)
-
-bb_use_plt:
-
- /* find the plt entry and initialize it if necessary */
-
-#if defined(USE_PLT_LIST)
- for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;)
- pe = pe->next;
-#else
- pe = &isym->pltent;
-#endif
-
- if (! pe->inited) {
- ip = (unsigned long *) (ifile->plt->contents + pe->offset);
-
- /* generate some machine code */
-
-#if defined(__arm__)
- ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */
- ip[1] = v; /* sym@ */
-#endif
-#if defined(__powerpc__)
- ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */
- ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */
- ip[2] = 0x7d6903a6; /* mtctr r11 */
- ip[3] = 0x4e800420; /* bctr */
-#endif
-#if defined(__v850e__)
- /* We have to trash a register, so we assume that any control
- transfer more than 21-bits away must be a function call
- (so we can use a call-clobbered register). */
- ip[0] = 0x0621 + ((v & 0xffff) << 16); /* mov sym, r1 ... */
- ip[1] = ((v >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */
-#endif
- pe->inited = 1;
- }
-
- /* relative distance to target */
- v -= dot;
- /* if the target is too far away.... */
-#if defined(__arm__) || defined(__powerpc__)
- if ((int)v < -0x02000000 || (int)v >= 0x02000000)
-#elif defined(__v850e__)
- if ((ElfW(Sword))v > 0x1fffff || (ElfW(Sword))v < (ElfW(Sword))-0x200000)
-#endif
- /* go via the plt */
- v = plt + pe->offset - dot;
-
-#if defined(__v850e__)
- if (v & 1)
-#else
- if (v & 3)
-#endif
- ret = obj_reloc_dangerous;
-
- /* merge the offset into the instruction. */
-#if defined(__arm__)
- /* Convert to words. */
- v >>= 2;
-
- *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff);
-#endif
-#if defined(__powerpc__)
- *loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc);
-#endif
-#if defined(__v850e__)
- /* We write two shorts instead of a long because even 32-bit insns
- only need half-word alignment, but the 32-bit data write needs
- to be long-word aligned. */
- ((unsigned short *)loc)[0] =
- (*(unsigned short *)loc & 0xffc0) /* opcode + reg */
- | ((v >> 16) & 0x3f); /* offs high part */
- ((unsigned short *)loc)[1] =
- (v & 0xffff); /* offs low part */
-#endif
- break;
-#endif /* USE_PLT_ENTRIES */
-
-#if defined(USE_GOT_ENTRIES)
-bb_use_got:
-
- /* needs an entry in the .got: set it, once */
- if (!isym->gotent.inited) {
- isym->gotent.inited = 1;
- *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v;
- }
- /* make the reloc with_respect_to_.got */
-#if defined(__sh__)
- *loc += isym->gotent.offset + rel->r_addend;
-#elif defined(__i386__) || defined(__arm__) || defined(__mc68000__)
- *loc += isym->gotent.offset;
-#endif
- break;
-
-#endif /* USE_GOT_ENTRIES */
- }
-
- return ret;
-}
-
-
-#if defined(USE_LIST)
-
-static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list,
- int offset, int size)
-{
- struct arch_list_entry *pe;
-
- for (pe = *list; pe != NULL; pe = pe->next) {
- if (pe->addend == rel->r_addend) {
- break;
- }
- }
-
- if (pe == NULL) {
- pe = xmalloc(sizeof(struct arch_list_entry));
- pe->next = *list;
- pe->addend = rel->r_addend;
- pe->offset = offset;
- pe->inited = 0;
- *list = pe;
- return size;
- }
- return 0;
-}
-
-#endif
-
-#if defined(USE_SINGLE)
-
-static int arch_single_init(/*ElfW(RelM) *rel,*/ struct arch_single_entry *single,
- int offset, int size)
-{
- if (single->allocated == 0) {
- single->allocated = 1;
- single->offset = offset;
- single->inited = 0;
- return size;
- }
- return 0;
-}
-
-#endif
-
-#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
-
-static struct obj_section *arch_xsect_init(struct obj_file *f, const char *name,
- int offset, int size)
-{
- struct obj_section *myrelsec = obj_find_section(f, name);
-
- if (offset == 0) {
- offset += size;
- }
-
- if (myrelsec) {
- obj_extend_section(myrelsec, offset);
- } else {
- myrelsec = obj_create_alloced_section(f, name,
- size, offset);
- }
-
- return myrelsec;
-}
-
-#endif
-
-static void arch_create_got(struct obj_file *f)
-{
-#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
- struct arch_file *ifile = (struct arch_file *) f;
- int i;
-#if defined(USE_GOT_ENTRIES)
- int got_offset = 0, got_needed = 0, got_allocate;
-#endif
-#if defined(USE_PLT_ENTRIES)
- int plt_offset = 0, plt_needed = 0, plt_allocate;
-#endif
- struct obj_section *relsec, *symsec, *strsec;
- ElfW(RelM) *rel, *relend;
- ElfW(Sym) *symtab, *extsym;
- const char *strtab, *name;
- struct arch_symbol *intsym;
-
- for (i = 0; i < f->header.e_shnum; ++i) {
- relsec = f->sections[i];
- if (relsec->header.sh_type != SHT_RELM)
- continue;
-
- symsec = f->sections[relsec->header.sh_link];
- strsec = f->sections[symsec->header.sh_link];
-
- rel = (ElfW(RelM) *) relsec->contents;
- relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM)));
- symtab = (ElfW(Sym) *) symsec->contents;
- strtab = (const char *) strsec->contents;
-
- for (; rel < relend; ++rel) {
- extsym = &symtab[ELF_R_SYM(rel->r_info)];
-
-#if defined(USE_GOT_ENTRIES)
- got_allocate = 0;
-#endif
-#if defined(USE_PLT_ENTRIES)
- plt_allocate = 0;
-#endif
-
- switch (ELF_R_TYPE(rel->r_info)) {
-#if defined(__arm__)
- case R_ARM_PC24:
- case R_ARM_PLT32:
- plt_allocate = 1;
- break;
-
- case R_ARM_GOTOFF:
- case R_ARM_GOTPC:
- got_needed = 1;
- continue;
-
- case R_ARM_GOT32:
- got_allocate = 1;
- break;
-
-#elif defined(__i386__)
- case R_386_GOTPC:
- case R_386_GOTOFF:
- got_needed = 1;
- continue;
-
- case R_386_GOT32:
- got_allocate = 1;
- break;
-
-#elif defined(__powerpc__)
- case R_PPC_REL24:
- plt_allocate = 1;
- break;
-
-#elif defined(__mc68000__)
- case R_68K_GOT32:
- got_allocate = 1;
- break;
-
-#ifdef R_68K_GOTOFF
- case R_68K_GOTOFF:
- got_needed = 1;
- continue;
-#endif
-
-#elif defined(__sh__)
- case R_SH_GOT32:
- got_allocate = 1;
- break;
-
- case R_SH_GOTPC:
- case R_SH_GOTOFF:
- got_needed = 1;
- continue;
-
-#elif defined(__v850e__)
- case R_V850_22_PCREL:
- plt_needed = 1;
- break;
-
-#endif
- default:
- continue;
- }
-
- if (extsym->st_name != 0) {
- name = strtab + extsym->st_name;
- } else {
- name = f->sections[extsym->st_shndx]->name;
- }
- intsym = (struct arch_symbol *) obj_find_symbol(f, name);
-#if defined(USE_GOT_ENTRIES)
- if (got_allocate) {
- got_offset += arch_single_init(
- /*rel,*/ &intsym->gotent,
- got_offset, GOT_ENTRY_SIZE);
-
- got_needed = 1;
- }
-#endif
-#if defined(USE_PLT_ENTRIES)
- if (plt_allocate) {
-#if defined(USE_PLT_LIST)
- plt_offset += arch_list_add(
- rel, &intsym->pltent,
- plt_offset, PLT_ENTRY_SIZE);
-#else
- plt_offset += arch_single_init(
- /*rel,*/ &intsym->pltent,
- plt_offset, PLT_ENTRY_SIZE);
-#endif
- plt_needed = 1;
- }
-#endif
- }
- }
-
-#if defined(USE_GOT_ENTRIES)
- if (got_needed) {
- ifile->got = arch_xsect_init(f, ".got", got_offset,
- GOT_ENTRY_SIZE);
- }
-#endif
-
-#if defined(USE_PLT_ENTRIES)
- if (plt_needed) {
- ifile->plt = arch_xsect_init(f, ".plt", plt_offset,
- PLT_ENTRY_SIZE);
- }
-#endif
-
-#endif /* defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) */
-}
-
-/*======================================================================*/
-
-/* Standard ELF hash function. */
-static unsigned long obj_elf_hash_n(const char *name, unsigned long n)
-{
- unsigned long h = 0;
- unsigned long g;
- unsigned char ch;
-
- while (n > 0) {
- ch = *name++;
- h = (h << 4) + ch;
- g = (h & 0xf0000000);
- if (g != 0) {
- h ^= g >> 24;
- h &= ~g;
- }
- n--;
- }
- return h;
-}
-
-static unsigned long obj_elf_hash(const char *name)
-{
- return obj_elf_hash_n(name, strlen(name));
-}
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
-/* String comparison for non-co-versioned kernel and module. */
-
-static int ncv_strcmp(const char *a, const char *b)
-{
- size_t alen = strlen(a), blen = strlen(b);
-
- if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R')
- return strncmp(a, b, alen);
- else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R')
- return strncmp(a, b, blen);
- else
- return strcmp(a, b);
-}
-
-/* String hashing for non-co-versioned kernel and module. Here
- we are simply forced to drop the crc from the hash. */
-
-static unsigned long ncv_symbol_hash(const char *str)
-{
- size_t len = strlen(str);
- if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R')
- len -= 10;
- return obj_elf_hash_n(str, len);
-}
-
-static void
-obj_set_symbol_compare(struct obj_file *f,
- int (*cmp) (const char *, const char *),
- unsigned long (*hash) (const char *))
-{
- if (cmp)
- f->symbol_cmp = cmp;
- if (hash) {
- struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next;
- int i;
-
- f->symbol_hash = hash;
-
- memcpy(tmptab, f->symtab, sizeof(tmptab));
- memset(f->symtab, 0, sizeof(f->symtab));
-
- for (i = 0; i < HASH_BUCKETS; ++i)
- for (sym = tmptab[i]; sym; sym = next) {
- unsigned long h = hash(sym->name) % HASH_BUCKETS;
- next = sym->next;
- sym->next = f->symtab[h];
- f->symtab[h] = sym;
- }
- }
-}
-
-#endif /* FEATURE_INSMOD_VERSION_CHECKING */
-
-static struct obj_symbol *
-obj_add_symbol(struct obj_file *f, const char *name,
- unsigned long symidx, int info,
- int secidx, ElfW(Addr) value,
- unsigned long size)
-{
- struct obj_symbol *sym;
- unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
- int n_type = ELF_ST_TYPE(info);
- int n_binding = ELF_ST_BIND(info);
-
- for (sym = f->symtab[hash]; sym; sym = sym->next) {
- if (f->symbol_cmp(sym->name, name) == 0) {
- int o_secidx = sym->secidx;
- int o_info = sym->info;
- int o_type = ELF_ST_TYPE(o_info);
- int o_binding = ELF_ST_BIND(o_info);
-
- /* A redefinition! Is it legal? */
-
- if (secidx == SHN_UNDEF)
- return sym;
- else if (o_secidx == SHN_UNDEF)
- goto found;
- else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) {
- /* Cope with local and global symbols of the same name
- in the same object file, as might have been created
- by ld -r. The only reason locals are now seen at this
- level at all is so that we can do semi-sensible things
- with parameters. */
-
- struct obj_symbol *nsym, **p;
-
- nsym = arch_new_symbol();
- nsym->next = sym->next;
- nsym->ksymidx = -1;
-
- /* Excise the old (local) symbol from the hash chain. */
- for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next)
- continue;
- *p = sym = nsym;
- goto found;
- } else if (n_binding == STB_LOCAL) {
- /* Another symbol of the same name has already been defined.
- Just add this to the local table. */
- sym = arch_new_symbol();
- sym->next = NULL;
- sym->ksymidx = -1;
- f->local_symtab[symidx] = sym;
- goto found;
- } else if (n_binding == STB_WEAK)
- return sym;
- else if (o_binding == STB_WEAK)
- goto found;
- /* Don't unify COMMON symbols with object types the programmer
- doesn't expect. */
- else if (secidx == SHN_COMMON
- && (o_type == STT_NOTYPE || o_type == STT_OBJECT))
- return sym;
- else if (o_secidx == SHN_COMMON
- && (n_type == STT_NOTYPE || n_type == STT_OBJECT))
- goto found;
- else {
- /* Don't report an error if the symbol is coming from
- the kernel or some external module. */
- if (secidx <= SHN_HIRESERVE)
- bb_error_msg("%s multiply defined", name);
- return sym;
- }
- }
- }
-
- /* Completely new symbol. */
- sym = arch_new_symbol();
- sym->next = f->symtab[hash];
- f->symtab[hash] = sym;
- sym->ksymidx = -1;
- if (ELF_ST_BIND(info) == STB_LOCAL && symidx != (unsigned long)(-1)) {
- if (symidx >= f->local_symtab_size)
- bb_error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld",
- name, (long) symidx, (long) f->local_symtab_size);
- else
- f->local_symtab[symidx] = sym;
- }
-
-found:
- sym->name = name;
- sym->value = value;
- sym->size = size;
- sym->secidx = secidx;
- sym->info = info;
-
- return sym;
-}
-
-static struct obj_symbol *
-obj_find_symbol(struct obj_file *f, const char *name)
-{
- struct obj_symbol *sym;
- unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
-
- for (sym = f->symtab[hash]; sym; sym = sym->next)
- if (f->symbol_cmp(sym->name, name) == 0)
- return sym;
- return NULL;
-}
-
-static ElfW(Addr) obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym)
-{
- if (sym) {
- if (sym->secidx >= SHN_LORESERVE)
- return sym->value;
- return sym->value + f->sections[sym->secidx]->header.sh_addr;
- }
- /* As a special case, a NULL sym has value zero. */
- return 0;
-}
-
-static struct obj_section *obj_find_section(struct obj_file *f, const char *name)
-{
- int i, n = f->header.e_shnum;
-
- for (i = 0; i < n; ++i)
- if (strcmp(f->sections[i]->name, name) == 0)
- return f->sections[i];
- return NULL;
-}
-
-static int obj_load_order_prio(struct obj_section *a)
-{
- unsigned long af, ac;
-
- af = a->header.sh_flags;
-
- ac = 0;
- if (a->name[0] != '.' || strlen(a->name) != 10
- || strcmp(a->name + 5, ".init") != 0
- ) {
- ac |= 32;
- }
- if (af & SHF_ALLOC)
- ac |= 16;
- if (!(af & SHF_WRITE))
- ac |= 8;
- if (af & SHF_EXECINSTR)
- ac |= 4;
- if (a->header.sh_type != SHT_NOBITS)
- ac |= 2;
-
- return ac;
-}
-
-static void
-obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec)
-{
- struct obj_section **p;
- int prio = obj_load_order_prio(sec);
- for (p = f->load_order_search_start; *p; p = &(*p)->load_next)
- if (obj_load_order_prio(*p) < prio)
- break;
- sec->load_next = *p;
- *p = sec;
-}
-
-static struct obj_section *obj_create_alloced_section(struct obj_file *f,
- const char *name,
- unsigned long align,
- unsigned long size)
-{
- int newidx = f->header.e_shnum++;
- struct obj_section *sec;
-
- f->sections = xrealloc_vector(f->sections, 2, newidx);
- f->sections[newidx] = sec = arch_new_section();
-
- sec->header.sh_type = SHT_PROGBITS;
- sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
- sec->header.sh_size = size;
- sec->header.sh_addralign = align;
- sec->name = name;
- sec->idx = newidx;
- if (size)
- sec->contents = xzalloc(size);
-
- obj_insert_section_load_order(f, sec);
-
- return sec;
-}
-
-static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
- const char *name,
- unsigned long align,
- unsigned long size)
-{
- int newidx = f->header.e_shnum++;
- struct obj_section *sec;
-
- f->sections = xrealloc_vector(f->sections, 2, newidx);
- f->sections[newidx] = sec = arch_new_section();
-
- sec->header.sh_type = SHT_PROGBITS;
- sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
- sec->header.sh_size = size;
- sec->header.sh_addralign = align;
- sec->name = name;
- sec->idx = newidx;
- if (size)
- sec->contents = xzalloc(size);
-
- sec->load_next = f->load_order;
- f->load_order = sec;
- if (f->load_order_search_start == &f->load_order)
- f->load_order_search_start = &sec->load_next;
-
- return sec;
-}
-
-static void *obj_extend_section(struct obj_section *sec, unsigned long more)
-{
- unsigned long oldsize = sec->header.sh_size;
- if (more) {
- sec->header.sh_size += more;
- sec->contents = xrealloc(sec->contents, sec->header.sh_size);
- }
- return sec->contents + oldsize;
-}
-
-
-/* Conditionally add the symbols from the given symbol set to the
- new module. */
-
-static int
-add_symbols_from( struct obj_file *f,
- int idx, struct new_module_symbol *syms, size_t nsyms)
-{
- struct new_module_symbol *s;
- size_t i;
- int used = 0;
-#ifdef SYMBOL_PREFIX
- char *name_buf = 0;
- size_t name_alloced_size = 0;
-#endif
-#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
- int gpl;
-
- gpl = obj_gpl_license(f, NULL) == 0;
-#endif
- for (i = 0, s = syms; i < nsyms; ++i, ++s) {
- /* Only add symbols that are already marked external.
- If we override locals we may cause problems for
- argument initialization. We will also create a false
- dependency on the module. */
- struct obj_symbol *sym;
- char *name;
-
- /* GPL licensed modules can use symbols exported with
- * EXPORT_SYMBOL_GPL, so ignore any GPLONLY_ prefix on the
- * exported names. Non-GPL modules never see any GPLONLY_
- * symbols so they cannot fudge it by adding the prefix on
- * their references.
- */
- if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) {
-#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
- if (gpl)
- s->name += 8;
- else
-#endif
- continue;
- }
- name = (char *)s->name;
-
-#ifdef SYMBOL_PREFIX
- /* Prepend SYMBOL_PREFIX to the symbol's name (the
- kernel exports `C names', but module object files
- reference `linker names'). */
- size_t extra = sizeof SYMBOL_PREFIX;
- size_t name_size = strlen(name) + extra;
- if (name_size > name_alloced_size) {
- name_alloced_size = name_size * 2;
- name_buf = alloca(name_alloced_size);
- }
- strcpy(name_buf, SYMBOL_PREFIX);
- strcpy(name_buf + extra - 1, name);
- name = name_buf;
-#endif /* SYMBOL_PREFIX */
-
- sym = obj_find_symbol(f, name);
- if (sym && !(ELF_ST_BIND(sym->info) == STB_LOCAL)) {
-#ifdef SYMBOL_PREFIX
- /* Put NAME_BUF into more permanent storage. */
- name = xmalloc(name_size);
- strcpy(name, name_buf);
-#endif
- sym = obj_add_symbol(f, name, -1,
- ELF_ST_INFO(STB_GLOBAL,
- STT_NOTYPE),
- idx, s->value, 0);
- /* Did our symbol just get installed? If so, mark the
- module as "used". */
- if (sym->secidx == idx)
- used = 1;
- }
- }
-
- return used;
-}
-
-static void add_kernel_symbols(struct obj_file *f)
-{
- struct external_module *m;
- int i, nused = 0;
-
- /* Add module symbols first. */
-
- for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) {
- if (m->nsyms
- && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, m->nsyms)
- ) {
- m->used = 1;
- ++nused;
- }
- }
-
- n_ext_modules_used = nused;
-
- /* And finally the symbols from the kernel proper. */
-
- if (nksyms)
- add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms);
-}
-
-static char *get_modinfo_value(struct obj_file *f, const char *key)
-{
- struct obj_section *sec;
- char *p, *v, *n, *ep;
- size_t klen = strlen(key);
-
- sec = obj_find_section(f, ".modinfo");
- if (sec == NULL)
- return NULL;
- p = sec->contents;
- ep = p + sec->header.sh_size;
- while (p < ep) {
- v = strchr(p, '=');
- n = strchr(p, '\0');
- if (v) {
- if (p + klen == v && strncmp(p, key, klen) == 0)
- return v + 1;
- } else {
- if (p + klen == n && strcmp(p, key) == 0)
- return n;
- }
- p = n + 1;
- }
-
- return NULL;
-}
-
-
-/*======================================================================*/
-/* Functions relating to module loading after 2.1.18. */
-
-static void
-new_process_module_arguments(struct obj_file *f, int argc, char **argv)
-{
- while (argc > 0) {
- char *p, *q, *key, *sym_name;
- struct obj_symbol *sym;
- char *contents, *loc;
- int min, max, n;
-
- p = *argv;
- q = strchr(p, '=');
- if (q == NULL) {
- argc--;
- continue;
- }
-
- key = alloca(q - p + 6);
- memcpy(key, "parm_", 5);
- memcpy(key + 5, p, q - p);
- key[q - p + 5] = 0;
-
- p = get_modinfo_value(f, key);
- key += 5;
- if (p == NULL) {
- bb_error_msg_and_die("invalid parameter %s", key);
- }
-
-#ifdef SYMBOL_PREFIX
- sym_name = alloca(strlen(key) + sizeof SYMBOL_PREFIX);
- strcpy(sym_name, SYMBOL_PREFIX);
- strcat(sym_name, key);
-#else
- sym_name = key;
-#endif
- sym = obj_find_symbol(f, sym_name);
-
- /* Also check that the parameter was not resolved from the kernel. */
- if (sym == NULL || sym->secidx > SHN_HIRESERVE) {
- bb_error_msg_and_die("symbol for parameter %s not found", key);
- }
-
- if (isdigit(*p)) {
- min = strtoul(p, &p, 10);
- if (*p == '-')
- max = strtoul(p + 1, &p, 10);
- else
- max = min;
- } else
- min = max = 1;
-
- contents = f->sections[sym->secidx]->contents;
- loc = contents + sym->value;
- n = (*++q != '\0');
-
- while (1) {
- if ((*p == 's') || (*p == 'c')) {
- char *str;
-
- /* Do C quoting if we begin with a ", else slurp the lot. */
- if (*q == '"') {
- char *r;
-
- str = alloca(strlen(q));
- for (r = str, q++; *q != '"'; ++q, ++r) {
- if (*q == '\0')
- bb_error_msg_and_die("improperly terminated string argument for %s",
- key);
- if (*q == '\\')
- switch (*++q) {
- case 'a':
- *r = '\a';
- break;
- case 'b':
- *r = '\b';
- break;
- case 'e':
- *r = '\033';
- break;
- case 'f':
- *r = '\f';
- break;
- case 'n':
- *r = '\n';
- break;
- case 'r':
- *r = '\r';
- break;
- case 't':
- *r = '\t';
- break;
-
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- {
- int c = *q - '0';
- if (q[1] >= '0' && q[1] <= '7') {
- c = (c * 8) + *++q - '0';
- if (q[1] >= '0' && q[1] <= '7')
- c = (c * 8) + *++q - '0';
- }
- *r = c;
- }
- break;
-
- default:
- *r = *q;
- break;
- }
- else
- *r = *q;
- }
- *r = '\0';
- ++q;
- } else {
- char *r;
-
- /* In this case, the string is not quoted. We will break
- it using the coma (like for ints). If the user wants to
- include comas in a string, he just has to quote it */
-
- /* Search the next coma */
- r = strchr(q, ',');
-
- /* Found ? */
- if (r != (char *) NULL) {
- /* Recopy the current field */
- str = alloca(r - q + 1);
- memcpy(str, q, r - q);
-
- /* I don't know if it is useful, as the previous case
- doesn't nul terminate the string ??? */
- str[r - q] = '\0';
-
- /* Keep next fields */
- q = r;
- } else {
- /* last string */
- str = q;
- q = (char*)"";
- }
- }
-
- if (*p == 's') {
- /* Normal string */
- obj_string_patch(f, sym->secidx, loc - contents, str);
- loc += tgt_sizeof_char_p;
- } else {
- /* Array of chars (in fact, matrix!) */
- unsigned long charssize; /* size of each member */
-
- /* Get the size of each member */
- /* Probably we should do that outside the loop ? */
- if (!isdigit(*(p + 1))) {
- bb_error_msg_and_die("parameter type 'c' for %s must be followed by"
- " the maximum size", key);
- }
- charssize = strtoul(p + 1, (char **) NULL, 10);
-
- /* Check length */
- if (strlen(str) >= charssize) {
- bb_error_msg_and_die("string too long for %s (max %ld)", key,
- charssize - 1);
- }
-
- /* Copy to location */
- strcpy((char *) loc, str);
- loc += charssize;
- }
- } else {
- long v = strtoul(q, &q, 0);
- switch (*p) {
- case 'b':
- *loc++ = v;
- break;
- case 'h':
- *(short *) loc = v;
- loc += tgt_sizeof_short;
- break;
- case 'i':
- *(int *) loc = v;
- loc += tgt_sizeof_int;
- break;
- case 'l':
- *(long *) loc = v;
- loc += tgt_sizeof_long;
- break;
-
- default:
- bb_error_msg_and_die("unknown parameter type '%c' for %s", *p, key);
- }
- }
- retry_end_of_value:
- switch (*q) {
- case '\0':
- goto end_of_arg;
-
- case ' ':
- case '\t':
- case '\n':
- case '\r':
- ++q;
- goto retry_end_of_value;
-
- case ',':
- if (++n > max) {
- bb_error_msg_and_die("too many values for %s (max %d)", key, max);
- }
- ++q;
- break;
-
- default:
- bb_error_msg_and_die("invalid argument syntax for %s", key);
- }
- }
- end_of_arg:
- if (n < min) {
- bb_error_msg_and_die("too few values for %s (min %d)", key, min);
- }
-
- argc--;
- argv++;
- }
-}
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
-static int new_is_module_checksummed(struct obj_file *f)
-{
- const char *p = get_modinfo_value(f, "using_checksums");
- if (p)
- return xatoi(p);
- return 0;
-}
-
-/* Get the module's kernel version in the canonical integer form. */
-
-static int
-new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
-{
- char *p, *q;
- int a, b, c;
-
- p = get_modinfo_value(f, "kernel_version");
- if (p == NULL)
- return -1;
- safe_strncpy(str, p, STRVERSIONLEN);
-
- a = strtoul(p, &p, 10);
- if (*p != '.')
- return -1;
- b = strtoul(p + 1, &p, 10);
- if (*p != '.')
- return -1;
- c = strtoul(p + 1, &q, 10);
- if (p + 1 == q)
- return -1;
-
- return a << 16 | b << 8 | c;
-}
-
-#endif /* FEATURE_INSMOD_VERSION_CHECKING */
-
-
-/* Fetch the loaded modules, and all currently exported symbols. */
-
-static void new_get_kernel_symbols(void)
-{
- char *module_names, *mn;
- struct external_module *modules, *m;
- struct new_module_symbol *syms, *s;
- size_t ret, bufsize, nmod, nsyms, i, j;
-
- /* Collect the loaded modules. */
-
- bufsize = 256;
- module_names = xmalloc(bufsize);
-
- retry_modules_load:
- if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) {
- if (errno == ENOSPC && bufsize < ret) {
- bufsize = ret;
- module_names = xrealloc(module_names, bufsize);
- goto retry_modules_load;
- }
- bb_perror_msg_and_die("QM_MODULES");
- }
-
- n_ext_modules = nmod = ret;
-
- /* Collect the modules' symbols. */
-
- if (nmod) {
- ext_modules = modules = xzalloc(nmod * sizeof(*modules));
- for (i = 0, mn = module_names, m = modules;
- i < nmod; ++i, ++m, mn += strlen(mn) + 1) {
- struct new_module_info info;
-
- if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) {
- if (errno == ENOENT) {
- /* The module was removed out from underneath us. */
- continue;
- }
- bb_perror_msg_and_die("query_module: QM_INFO: %s", mn);
- }
-
- bufsize = 1024;
- syms = xmalloc(bufsize);
- retry_mod_sym_load:
- if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) {
- switch (errno) {
- case ENOSPC:
- bufsize = ret;
- syms = xrealloc(syms, bufsize);
- goto retry_mod_sym_load;
- case ENOENT:
- /* The module was removed out from underneath us. */
- continue;
- default:
- bb_perror_msg_and_die("query_module: QM_SYMBOLS: %s", mn);
- }
- }
- nsyms = ret;
-
- m->name = mn;
- m->addr = info.addr;
- m->nsyms = nsyms;
- m->syms = syms;
-
- for (j = 0, s = syms; j < nsyms; ++j, ++s) {
- s->name += (unsigned long) syms;
- }
- }
- }
-
- /* Collect the kernel's symbols. */
-
- syms = xmalloc(bufsize = 16 * 1024);
- retry_kern_sym_load:
- if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) {
- if (errno == ENOSPC && bufsize < ret) {
- bufsize = ret;
- syms = xrealloc(syms, bufsize);
- goto retry_kern_sym_load;
- }
- bb_perror_msg_and_die("kernel: QM_SYMBOLS");
- }
- nksyms = nsyms = ret;
- ksyms = syms;
-
- for (j = 0, s = syms; j < nsyms; ++j, ++s) {
- s->name += (unsigned long) syms;
- }
-}
-
-
-/* Return the kernel symbol checksum version, or zero if not used. */
-
-static int new_is_kernel_checksummed(void)
-{
- struct new_module_symbol *s;
- size_t i;
-
- /* Using_Versions is not the first symbol, but it should be in there. */
-
- for (i = 0, s = ksyms; i < nksyms; ++i, ++s)
- if (strcmp((char *) s->name, "Using_Versions") == 0)
- return s->value;
-
- return 0;
-}
-
-
-static void new_create_this_module(struct obj_file *f, const char *m_name)
-{
- struct obj_section *sec;
-
- sec = obj_create_alloced_section_first(f, ".this", tgt_sizeof_long,
- sizeof(struct new_module));
- /* done by obj_create_alloced_section_first: */
- /*memset(sec->contents, 0, sizeof(struct new_module));*/
-
- obj_add_symbol(f, SPFX "__this_module", -1,
- ELF_ST_INFO(STB_LOCAL, STT_OBJECT), sec->idx, 0,
- sizeof(struct new_module));
-
- obj_string_patch(f, sec->idx, offsetof(struct new_module, name),
- m_name);
-}
-
-#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
-/* add an entry to the __ksymtab section, creating it if necessary */
-static void new_add_ksymtab(struct obj_file *f, struct obj_symbol *sym)
-{
- struct obj_section *sec;
- ElfW(Addr) ofs;
-
- /* ensure __ksymtab is allocated, EXPORT_NOSYMBOLS creates a non-alloc section.
- * If __ksymtab is defined but not marked alloc, x out the first character
- * (no obj_delete routine) and create a new __ksymtab with the correct
- * characteristics.
- */
- sec = obj_find_section(f, "__ksymtab");
- if (sec && !(sec->header.sh_flags & SHF_ALLOC)) {
- *((char *)(sec->name)) = 'x'; /* override const */
- sec = NULL;
- }
- if (!sec)
- sec = obj_create_alloced_section(f, "__ksymtab",
- tgt_sizeof_void_p, 0);
- if (!sec)
- return;
- sec->header.sh_flags |= SHF_ALLOC;
- /* Empty section might be byte-aligned */
- sec->header.sh_addralign = tgt_sizeof_void_p;
- ofs = sec->header.sh_size;
- obj_symbol_patch(f, sec->idx, ofs, sym);
- obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, sym->name);
- obj_extend_section(sec, 2 * tgt_sizeof_char_p);
-}
-#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
-
-static int new_create_module_ksymtab(struct obj_file *f)
-{
- struct obj_section *sec;
- int i;
-
- /* We must always add the module references. */
-
- if (n_ext_modules_used) {
- struct new_module_ref *dep;
- struct obj_symbol *tm;
-
- sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p,
- (sizeof(struct new_module_ref)
- * n_ext_modules_used));
- if (!sec)
- return 0;
-
- tm = obj_find_symbol(f, SPFX "__this_module");
- dep = (struct new_module_ref *) sec->contents;
- for (i = 0; i < n_ext_modules; ++i)
- if (ext_modules[i].used) {
- dep->dep = ext_modules[i].addr;
- obj_symbol_patch(f, sec->idx,
- (char *) &dep->ref - sec->contents, tm);
- dep->next_ref = 0;
- ++dep;
- }
- }
-
- if (!flag_noexport && !obj_find_section(f, "__ksymtab")) {
- size_t nsyms;
- int *loaded;
-
- sec = obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, 0);
-
- /* We don't want to export symbols residing in sections that
- aren't loaded. There are a number of these created so that
- we make sure certain module options don't appear twice. */
- i = f->header.e_shnum;
- loaded = alloca(sizeof(int) * i);
- while (--i >= 0)
- loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0;
-
- for (nsyms = i = 0; i < HASH_BUCKETS; ++i) {
- struct obj_symbol *sym;
- for (sym = f->symtab[i]; sym; sym = sym->next) {
- if (ELF_ST_BIND(sym->info) != STB_LOCAL
- && sym->secidx <= SHN_HIRESERVE
- && (sym->secidx >= SHN_LORESERVE
- || loaded[sym->secidx])
- ) {
- ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p;
-
- obj_symbol_patch(f, sec->idx, ofs, sym);
- obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p,
- sym->name);
-
- nsyms++;
- }
- }
- }
-
- obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p);
- }
-
- return 1;
-}
-
-
-static int
-new_init_module(const char *m_name, struct obj_file *f, unsigned long m_size)
-{
- struct new_module *module;
- struct obj_section *sec;
- void *image;
- int ret;
- tgt_long m_addr;
-
- sec = obj_find_section(f, ".this");
- if (!sec || !sec->contents) {
- bb_perror_msg_and_die("corrupt module %s?", m_name);
- }
- module = (struct new_module *) sec->contents;
- m_addr = sec->header.sh_addr;
-
- module->size_of_struct = sizeof(*module);
- module->size = m_size;
- module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0;
-
- sec = obj_find_section(f, "__ksymtab");
- if (sec && sec->header.sh_size) {
- module->syms = sec->header.sh_addr;
- module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p);
- }
-
- if (n_ext_modules_used) {
- sec = obj_find_section(f, ".kmodtab");
- module->deps = sec->header.sh_addr;
- module->ndeps = n_ext_modules_used;
- }
-
- module->init =
- obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module"));
- module->cleanup =
- obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module"));
-
- sec = obj_find_section(f, "__ex_table");
- if (sec) {
- module->ex_table_start = sec->header.sh_addr;
- module->ex_table_end = sec->header.sh_addr + sec->header.sh_size;
- }
-
- sec = obj_find_section(f, ".text.init");
- if (sec) {
- module->runsize = sec->header.sh_addr - m_addr;
- }
- sec = obj_find_section(f, ".data.init");
- if (sec) {
- if (!module->runsize
- || module->runsize > sec->header.sh_addr - m_addr
- ) {
- module->runsize = sec->header.sh_addr - m_addr;
- }
- }
- sec = obj_find_section(f, ARCHDATA_SEC_NAME);
- if (sec && sec->header.sh_size) {
- module->archdata_start = (void*)sec->header.sh_addr;
- module->archdata_end = module->archdata_start + sec->header.sh_size;
- }
- sec = obj_find_section(f, KALLSYMS_SEC_NAME);
- if (sec && sec->header.sh_size) {
- module->kallsyms_start = (void*)sec->header.sh_addr;
- module->kallsyms_end = module->kallsyms_start + sec->header.sh_size;
- }
-
- /* Whew! All of the initialization is complete. Collect the final
- module image and give it to the kernel. */
-
- image = xmalloc(m_size);
- obj_create_image(f, image);
-
- ret = init_module(m_name, (struct new_module *) image);
- if (ret)
- bb_perror_msg("init_module: %s", m_name);
-
- free(image);
-
- return ret == 0;
-}
-
-
-/*======================================================================*/
-
-static void
-obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
- const char *string)
-{
- struct obj_string_patch *p;
- struct obj_section *strsec;
- size_t len = strlen(string) + 1;
- char *loc;
-
- p = xmalloc(sizeof(*p));
- p->next = f->string_patches;
- p->reloc_secidx = secidx;
- p->reloc_offset = offset;
- f->string_patches = p;
-
- strsec = obj_find_section(f, ".kstrtab");
- if (strsec == NULL) {
- strsec = obj_create_alloced_section(f, ".kstrtab", 1, len);
- p->string_offset = 0;
- loc = strsec->contents;
- } else {
- p->string_offset = strsec->header.sh_size;
- loc = obj_extend_section(strsec, len);
- }
- memcpy(loc, string, len);
-}
-
-static void
-obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
- struct obj_symbol *sym)
-{
- struct obj_symbol_patch *p;
-
- p = xmalloc(sizeof(*p));
- p->next = f->symbol_patches;
- p->reloc_secidx = secidx;
- p->reloc_offset = offset;
- p->sym = sym;
- f->symbol_patches = p;
-}
-
-static void obj_check_undefineds(struct obj_file *f)
-{
- unsigned i;
-
- for (i = 0; i < HASH_BUCKETS; ++i) {
- struct obj_symbol *sym;
- for (sym = f->symtab[i]; sym; sym = sym->next)
- if (sym->secidx == SHN_UNDEF) {
- if (ELF_ST_BIND(sym->info) == STB_WEAK) {
- sym->secidx = SHN_ABS;
- sym->value = 0;
- } else {
- if (!flag_quiet)
- bb_error_msg_and_die("unresolved symbol %s", sym->name);
- }
- }
- }
-}
-
-static void obj_allocate_commons(struct obj_file *f)
-{
- struct common_entry {
- struct common_entry *next;
- struct obj_symbol *sym;
- } *common_head = NULL;
-
- unsigned long i;
-
- for (i = 0; i < HASH_BUCKETS; ++i) {
- struct obj_symbol *sym;
- for (sym = f->symtab[i]; sym; sym = sym->next)
- if (sym->secidx == SHN_COMMON) {
- /* Collect all COMMON symbols and sort them by size so as to
- minimize space wasted by alignment requirements. */
- {
- struct common_entry **p, *n;
- for (p = &common_head; *p; p = &(*p)->next)
- if (sym->size <= (*p)->sym->size)
- break;
-
- n = alloca(sizeof(*n));
- n->next = *p;
- n->sym = sym;
- *p = n;
- }
- }
- }
-
- for (i = 1; i < f->local_symtab_size; ++i) {
- struct obj_symbol *sym = f->local_symtab[i];
- if (sym && sym->secidx == SHN_COMMON) {
- struct common_entry **p, *n;
- for (p = &common_head; *p; p = &(*p)->next)
- if (sym == (*p)->sym)
- break;
- else if (sym->size < (*p)->sym->size) {
- n = alloca(sizeof(*n));
- n->next = *p;
- n->sym = sym;
- *p = n;
- break;
- }
- }
- }
-
- if (common_head) {
- /* Find the bss section. */
- for (i = 0; i < f->header.e_shnum; ++i)
- if (f->sections[i]->header.sh_type == SHT_NOBITS)
- break;
-
- /* If for some reason there hadn't been one, create one. */
- if (i == f->header.e_shnum) {
- struct obj_section *sec;
-
- f->header.e_shnum++;
- f->sections = xrealloc_vector(f->sections, 2, i);
- f->sections[i] = sec = arch_new_section();
-
- sec->header.sh_type = SHT_PROGBITS;
- sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
- sec->name = ".bss";
- sec->idx = i;
- }
-
- /* Allocate the COMMONS. */
- {
- ElfW(Addr) bss_size = f->sections[i]->header.sh_size;
- ElfW(Addr) max_align = f->sections[i]->header.sh_addralign;
- struct common_entry *c;
-
- for (c = common_head; c; c = c->next) {
- ElfW(Addr) align = c->sym->value;
-
- if (align > max_align)
- max_align = align;
- if (bss_size & (align - 1))
- bss_size = (bss_size | (align - 1)) + 1;
-
- c->sym->secidx = i;
- c->sym->value = bss_size;
-
- bss_size += c->sym->size;
- }
-
- f->sections[i]->header.sh_size = bss_size;
- f->sections[i]->header.sh_addralign = max_align;
- }
- }
-
- /* For the sake of patch relocation and parameter initialization,
- allocate zeroed data for NOBITS sections now. Note that after
- this we cannot assume NOBITS are really empty. */
- for (i = 0; i < f->header.e_shnum; ++i) {
- struct obj_section *s = f->sections[i];
- if (s->header.sh_type == SHT_NOBITS) {
- s->contents = NULL;
- if (s->header.sh_size != 0)
- s->contents = xzalloc(s->header.sh_size),
- s->header.sh_type = SHT_PROGBITS;
- }
- }
-}
-
-static unsigned long obj_load_size(struct obj_file *f)
-{
- unsigned long dot = 0;
- struct obj_section *sec;
-
- /* Finalize the positions of the sections relative to one another. */
-
- for (sec = f->load_order; sec; sec = sec->load_next) {
- ElfW(Addr) align;
-
- align = sec->header.sh_addralign;
- if (align && (dot & (align - 1)))
- dot = (dot | (align - 1)) + 1;
-
- sec->header.sh_addr = dot;
- dot += sec->header.sh_size;
- }
-
- return dot;
-}
-
-static int obj_relocate(struct obj_file *f, ElfW(Addr) base)
-{
- int i, n = f->header.e_shnum;
- int ret = 1;
-
- /* Finalize the addresses of the sections. */
-
- f->baseaddr = base;
- for (i = 0; i < n; ++i)
- f->sections[i]->header.sh_addr += base;
-
- /* And iterate over all of the relocations. */
-
- for (i = 0; i < n; ++i) {
- struct obj_section *relsec, *symsec, *targsec, *strsec;
- ElfW(RelM) * rel, *relend;
- ElfW(Sym) * symtab;
- const char *strtab;
-
- relsec = f->sections[i];
- if (relsec->header.sh_type != SHT_RELM)
- continue;
-
- symsec = f->sections[relsec->header.sh_link];
- targsec = f->sections[relsec->header.sh_info];
- strsec = f->sections[symsec->header.sh_link];
-
- rel = (ElfW(RelM) *) relsec->contents;
- relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM)));
- symtab = (ElfW(Sym) *) symsec->contents;
- strtab = (const char *) strsec->contents;
-
- for (; rel < relend; ++rel) {
- ElfW(Addr) value = 0;
- struct obj_symbol *intsym = NULL;
- unsigned long symndx;
- ElfW(Sym) * extsym = 0;
- const char *errmsg;
-
- /* Attempt to find a value to use for this relocation. */
-
- symndx = ELF_R_SYM(rel->r_info);
- if (symndx) {
- /* Note we've already checked for undefined symbols. */
-
- extsym = &symtab[symndx];
- if (ELF_ST_BIND(extsym->st_info) == STB_LOCAL) {
- /* Local symbols we look up in the local table to be sure
- we get the one that is really intended. */
- intsym = f->local_symtab[symndx];
- } else {
- /* Others we look up in the hash table. */
- const char *name;
- if (extsym->st_name)
- name = strtab + extsym->st_name;
- else
- name = f->sections[extsym->st_shndx]->name;
- intsym = obj_find_symbol(f, name);
- }
-
- value = obj_symbol_final_value(f, intsym);
- intsym->referenced = 1;
- }
-#if SHT_RELM == SHT_RELA
-#if defined(__alpha__) && defined(AXP_BROKEN_GAS)
- /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */
- if (!extsym || !extsym->st_name
- || ELF_ST_BIND(extsym->st_info) != STB_LOCAL)
-#endif
- value += rel->r_addend;
-#endif
-
- /* Do it! */
- switch (arch_apply_relocation
- (f, targsec, /*symsec,*/ intsym, rel, value)
- ) {
- case obj_reloc_ok:
- break;
-
- case obj_reloc_overflow:
- errmsg = "Relocation overflow";
- goto bad_reloc;
- case obj_reloc_dangerous:
- errmsg = "Dangerous relocation";
- goto bad_reloc;
- case obj_reloc_unhandled:
- errmsg = "Unhandled relocation";
-bad_reloc:
- if (extsym) {
- bb_error_msg("%s of type %ld for %s", errmsg,
- (long) ELF_R_TYPE(rel->r_info),
- strtab + extsym->st_name);
- } else {
- bb_error_msg("%s of type %ld", errmsg,
- (long) ELF_R_TYPE(rel->r_info));
- }
- ret = 0;
- break;
- }
- }
- }
-
- /* Finally, take care of the patches. */
-
- if (f->string_patches) {
- struct obj_string_patch *p;
- struct obj_section *strsec;
- ElfW(Addr) strsec_base;
- strsec = obj_find_section(f, ".kstrtab");
- strsec_base = strsec->header.sh_addr;
-
- for (p = f->string_patches; p; p = p->next) {
- struct obj_section *targsec = f->sections[p->reloc_secidx];
- *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
- = strsec_base + p->string_offset;
- }
- }
-
- if (f->symbol_patches) {
- struct obj_symbol_patch *p;
-
- for (p = f->symbol_patches; p; p = p->next) {
- struct obj_section *targsec = f->sections[p->reloc_secidx];
- *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
- = obj_symbol_final_value(f, p->sym);
- }
- }
-
- return ret;
-}
-
-static int obj_create_image(struct obj_file *f, char *image)
-{
- struct obj_section *sec;
- ElfW(Addr) base = f->baseaddr;
-
- for (sec = f->load_order; sec; sec = sec->load_next) {
- char *secimg;
-
- if (sec->contents == 0 || sec->header.sh_size == 0)
- continue;
-
- secimg = image + (sec->header.sh_addr - base);
-
- /* Note that we allocated data for NOBITS sections earlier. */
- memcpy(secimg, sec->contents, sec->header.sh_size);
- }
-
- return 1;
-}
-
-/*======================================================================*/
-
-static struct obj_file *obj_load(FILE *fp, int loadprogbits UNUSED_PARAM)
-{
- struct obj_file *f;
- ElfW(Shdr) * section_headers;
- size_t shnum, i;
- char *shstrtab;
-
- /* Read the file header. */
-
- f = arch_new_file();
- f->symbol_cmp = strcmp;
- f->symbol_hash = obj_elf_hash;
- f->load_order_search_start = &f->load_order;
-
- fseek(fp, 0, SEEK_SET);
- if (fread(&f->header, sizeof(f->header), 1, fp) != 1) {
- bb_perror_msg_and_die("error reading ELF header");
- }
-
- if (f->header.e_ident[EI_MAG0] != ELFMAG0
- || f->header.e_ident[EI_MAG1] != ELFMAG1
- || f->header.e_ident[EI_MAG2] != ELFMAG2
- || f->header.e_ident[EI_MAG3] != ELFMAG3
- ) {
- bb_error_msg_and_die("not an ELF file");
- }
- if (f->header.e_ident[EI_CLASS] != ELFCLASSM
- || f->header.e_ident[EI_DATA] != (BB_BIG_ENDIAN ? ELFDATA2MSB : ELFDATA2LSB)
- || f->header.e_ident[EI_VERSION] != EV_CURRENT
- || !MATCH_MACHINE(f->header.e_machine)
- ) {
- bb_error_msg_and_die("ELF file not for this architecture");
- }
- if (f->header.e_type != ET_REL) {
- bb_error_msg_and_die("ELF file not a relocatable object");
- }
-
- /* Read the section headers. */
-
- if (f->header.e_shentsize != sizeof(ElfW(Shdr))) {
- bb_error_msg_and_die("section header size mismatch: %lu != %lu",
- (unsigned long) f->header.e_shentsize,
- (unsigned long) sizeof(ElfW(Shdr)));
- }
-
- shnum = f->header.e_shnum;
- /* Growth of ->sections vector will be done by
- * xrealloc_vector(..., 2, ...), therefore we must allocate
- * at least 2^2 = 4 extra elements here. */
- f->sections = xzalloc(sizeof(f->sections[0]) * (shnum + 4));
-
- section_headers = alloca(sizeof(ElfW(Shdr)) * shnum);
- fseek(fp, f->header.e_shoff, SEEK_SET);
- if (fread(section_headers, sizeof(ElfW(Shdr)), shnum, fp) != shnum) {
- bb_perror_msg_and_die("error reading ELF section headers");
- }
-
- /* Read the section data. */
-
- for (i = 0; i < shnum; ++i) {
- struct obj_section *sec;
-
- f->sections[i] = sec = arch_new_section();
-
- sec->header = section_headers[i];
- sec->idx = i;
-
- if (sec->header.sh_size) {
- switch (sec->header.sh_type) {
- case SHT_NULL:
- case SHT_NOTE:
- case SHT_NOBITS:
- /* ignore */
- break;
-
- case SHT_PROGBITS:
-#if LOADBITS
- if (!loadprogbits) {
- sec->contents = NULL;
- break;
- }
-#endif
- case SHT_SYMTAB:
- case SHT_STRTAB:
- case SHT_RELM:
- sec->contents = NULL;
- if (sec->header.sh_size > 0) {
- sec->contents = xzalloc(sec->header.sh_size);
- fseek(fp, sec->header.sh_offset, SEEK_SET);
- if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) {
- bb_perror_msg_and_die("error reading ELF section data");
- }
- }
- break;
-
-#if SHT_RELM == SHT_REL
- case SHT_RELA:
- bb_error_msg_and_die("RELA relocations not supported on this architecture");
-#else
- case SHT_REL:
- bb_error_msg_and_die("REL relocations not supported on this architecture");
-#endif
- default:
- if (sec->header.sh_type >= SHT_LOPROC) {
- /* Assume processor specific section types are debug
- info and can safely be ignored. If this is ever not
- the case (Hello MIPS?), don't put ifdefs here but
- create an arch_load_proc_section(). */
- break;
- }
-
- bb_error_msg_and_die("can't handle sections of type %ld",
- (long) sec->header.sh_type);
- }
- }
- }
-
- /* Do what sort of interpretation as needed by each section. */
-
- shstrtab = f->sections[f->header.e_shstrndx]->contents;
-
- for (i = 0; i < shnum; ++i) {
- struct obj_section *sec = f->sections[i];
- sec->name = shstrtab + sec->header.sh_name;
- }
-
- for (i = 0; i < shnum; ++i) {
- struct obj_section *sec = f->sections[i];
-
- /* .modinfo should be contents only but gcc has no attribute for that.
- * The kernel may have marked .modinfo as ALLOC, ignore this bit.
- */
- if (strcmp(sec->name, ".modinfo") == 0)
- sec->header.sh_flags &= ~SHF_ALLOC;
-
- if (sec->header.sh_flags & SHF_ALLOC)
- obj_insert_section_load_order(f, sec);
-
- switch (sec->header.sh_type) {
- case SHT_SYMTAB:
- {
- unsigned long nsym, j;
- char *strtab;
- ElfW(Sym) * sym;
-
- if (sec->header.sh_entsize != sizeof(ElfW(Sym))) {
- bb_error_msg_and_die("symbol size mismatch: %lu != %lu",
- (unsigned long) sec->header.sh_entsize,
- (unsigned long) sizeof(ElfW(Sym)));
- }
-
- nsym = sec->header.sh_size / sizeof(ElfW(Sym));
- strtab = f->sections[sec->header.sh_link]->contents;
- sym = (ElfW(Sym) *) sec->contents;
-
- /* Allocate space for a table of local symbols. */
- j = f->local_symtab_size = sec->header.sh_info;
- f->local_symtab = xzalloc(j * sizeof(struct obj_symbol *));
-
- /* Insert all symbols into the hash table. */
- for (j = 1, ++sym; j < nsym; ++j, ++sym) {
- ElfW(Addr) val = sym->st_value;
- const char *name;
- if (sym->st_name)
- name = strtab + sym->st_name;
- else if (sym->st_shndx < shnum)
- name = f->sections[sym->st_shndx]->name;
- else
- continue;
-#if defined(__SH5__)
- /*
- * For sh64 it is possible that the target of a branch
- * requires a mode switch (32 to 16 and back again).
- *
- * This is implied by the lsb being set in the target
- * address for SHmedia mode and clear for SHcompact.
- */
- val |= sym->st_other & 4;
-#endif
- obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx,
- val, sym->st_size);
- }
- }
- break;
-
- case SHT_RELM:
- if (sec->header.sh_entsize != sizeof(ElfW(RelM))) {
- bb_error_msg_and_die("relocation entry size mismatch: %lu != %lu",
- (unsigned long) sec->header.sh_entsize,
- (unsigned long) sizeof(ElfW(RelM)));
- }
- break;
- /* XXX Relocation code from modutils-2.3.19 is not here.
- * Why? That's about 20 lines of code from obj/obj_load.c,
- * which gets done in a second pass through the sections.
- * This BusyBox insmod does similar work in obj_relocate(). */
- }
- }
-
- return f;
-}
-
-#if ENABLE_FEATURE_INSMOD_LOADINKMEM
-/*
- * load the unloaded sections directly into the memory allocated by
- * kernel for the module
- */
-
-static int obj_load_progbits(FILE *fp, struct obj_file *f, char *imagebase)
-{
- ElfW(Addr) base = f->baseaddr;
- struct obj_section* sec;
-
- for (sec = f->load_order; sec; sec = sec->load_next) {
-
- /* section already loaded? */
- if (sec->contents != NULL)
- continue;
-
- if (sec->header.sh_size == 0)
- continue;
-
- sec->contents = imagebase + (sec->header.sh_addr - base);
- fseek(fp, sec->header.sh_offset, SEEK_SET);
- if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) {
- bb_perror_msg("error reading ELF section data");
- return 0;
- }
-
- }
- return 1;
-}
-#endif
-
-static void hide_special_symbols(struct obj_file *f)
-{
- static const char *const specials[] = {
- SPFX "cleanup_module",
- SPFX "init_module",
- SPFX "kernel_version",
- NULL
- };
-
- struct obj_symbol *sym;
- const char *const *p;
-
- for (p = specials; *p; ++p) {
- sym = obj_find_symbol(f, *p);
- if (sym != NULL)
- sym->info = ELF_ST_INFO(STB_LOCAL, ELF_ST_TYPE(sym->info));
- }
-}
-
-
-#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
-static int obj_gpl_license(struct obj_file *f, const char **license)
-{
- struct obj_section *sec;
- /* This list must match *exactly* the list of allowable licenses in
- * linux/include/linux/module.h. Checking for leading "GPL" will not
- * work, somebody will use "GPL sucks, this is proprietary".
- */
- static const char *const gpl_licenses[] = {
- "GPL",
- "GPL v2",
- "GPL and additional rights",
- "Dual BSD/GPL",
- "Dual MPL/GPL"
- };
-
- sec = obj_find_section(f, ".modinfo");
- if (sec) {
- const char *value, *ptr, *endptr;
- ptr = sec->contents;
- endptr = ptr + sec->header.sh_size;
- while (ptr < endptr) {
- value = strchr(ptr, '=');
- if (value && strncmp(ptr, "license", value-ptr) == 0) {
- unsigned i;
- if (license)
- *license = value+1;
- for (i = 0; i < ARRAY_SIZE(gpl_licenses); ++i) {
- if (strcmp(value+1, gpl_licenses[i]) == 0)
- return 0;
- }
- return 2;
- }
- ptr = strchr(ptr, '\0');
- if (ptr)
- ptr++;
- else
- ptr = endptr;
- }
- }
- return 1;
-}
-
-#define TAINT_FILENAME "/proc/sys/kernel/tainted"
-#define TAINT_PROPRIETORY_MODULE (1 << 0)
-#define TAINT_FORCED_MODULE (1 << 1)
-#define TAINT_UNSAFE_SMP (1 << 2)
-#define TAINT_URL "http://www.tux.org/lkml/#export-tainted"
-
-static void set_tainted(int fd, char *m_name,
- int kernel_has_tainted, int taint, const char *text1, const char *text2)
-{
- static smallint printed_info;
-
- char buf[80];
- int oldval;
-
- if (fd < 0 && !kernel_has_tainted)
- return; /* New modutils on old kernel */
- printf("Warning: loading %s will taint the kernel: %s%s\n",
- m_name, text1, text2);
- if (!printed_info) {
- printf(" See %s for information about tainted modules\n", TAINT_URL);
- printed_info = 1;
- }
- if (fd >= 0) {
- read(fd, buf, sizeof(buf)-1);
- buf[sizeof(buf)-1] = '\0';
- oldval = strtoul(buf, NULL, 10);
- sprintf(buf, "%d\n", oldval | taint);
- write(fd, buf, strlen(buf));
- }
-}
-
-/* Check if loading this module will taint the kernel. */
-static void check_tainted_module(struct obj_file *f, char *m_name)
-{
- static const char tainted_file[] ALIGN1 = TAINT_FILENAME;
-
- int fd, kernel_has_tainted;
- const char *ptr;
-
- kernel_has_tainted = 1;
- fd = open(tainted_file, O_RDWR);
- if (fd < 0) {
- if (errno == ENOENT)
- kernel_has_tainted = 0;
- else if (errno == EACCES)
- kernel_has_tainted = 1;
- else {
- perror(tainted_file);
- kernel_has_tainted = 0;
- }
- }
-
- switch (obj_gpl_license(f, &ptr)) {
- case 0:
- break;
- case 1:
- set_tainted(fd, m_name, kernel_has_tainted, TAINT_PROPRIETORY_MODULE, "no license", "");
- break;
- case 2:
- /* The module has a non-GPL license so we pretend that the
- * kernel always has a taint flag to get a warning even on
- * kernels without the proc flag.
- */
- set_tainted(fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "non-GPL license - ", ptr);
- break;
- default:
- set_tainted(fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "Unexpected return from obj_gpl_license", "");
- break;
- }
-
- if (flag_force_load)
- set_tainted(fd, m_name, 1, TAINT_FORCED_MODULE, "forced load", "");
-
- if (fd >= 0)
- close(fd);
-}
-#else /* FEATURE_CHECK_TAINTED_MODULE */
-#define check_tainted_module(x, y) do { } while (0);
-#endif /* FEATURE_CHECK_TAINTED_MODULE */
-
-#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
-/* add module source, timestamp, kernel version and a symbol for the
- * start of some sections. this info is used by ksymoops to do better
- * debugging.
- */
-#if !ENABLE_FEATURE_INSMOD_VERSION_CHECKING
-#define get_module_version(f, str) get_module_version(str)
-#endif
-static int
-get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
-{
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
- return new_get_module_version(f, str);
-#else /* FEATURE_INSMOD_VERSION_CHECKING */
- strncpy(str, "???", sizeof(str));
- return -1;
-#endif /* FEATURE_INSMOD_VERSION_CHECKING */
-}
-
-/* add module source, timestamp, kernel version and a symbol for the
- * start of some sections. this info is used by ksymoops to do better
- * debugging.
- */
-static void
-add_ksymoops_symbols(struct obj_file *f, const char *filename,
- const char *m_name)
-{
- static const char symprefix[] ALIGN1 = "__insmod_";
- static const char section_names[][8] = {
- ".text",
- ".rodata",
- ".data",
- ".bss",
- ".sbss"
- };
-
- struct obj_section *sec;
- struct obj_symbol *sym;
- char *name, *absolute_filename;
- char str[STRVERSIONLEN];
- unsigned i;
- int l, lm_name, lfilename, use_ksymtab, version;
- struct stat statbuf;
-
- /* WARNING: was using realpath, but replaced by readlink to stop using
- * lots of stack. But here it seems to be able to cause problems? */
- absolute_filename = xmalloc_readlink(filename);
- if (!absolute_filename)
- absolute_filename = xstrdup(filename);
-
- lm_name = strlen(m_name);
- lfilename = strlen(absolute_filename);
-
- /* add to ksymtab if it already exists or there is no ksymtab and other symbols
- * are not to be exported. otherwise leave ksymtab alone for now, the
- * "export all symbols" compatibility code will export these symbols later.
- */
- use_ksymtab = obj_find_section(f, "__ksymtab") || flag_noexport;
-
- sec = obj_find_section(f, ".this");
- if (sec) {
- /* tag the module header with the object name, last modified
- * timestamp and module version. worst case for module version
- * is 0xffffff, decimal 16777215. putting all three fields in
- * one symbol is less readable but saves kernel space.
- */
- l = sizeof(symprefix) + /* "__insmod_" */
- lm_name + /* module name */
- 2 + /* "_O" */
- lfilename + /* object filename */
- 2 + /* "_M" */
- 2 * sizeof(statbuf.st_mtime) + /* mtime in hex */
- 2 + /* "_V" */
- 8 + /* version in dec */
- 1; /* nul */
- name = xmalloc(l);
- if (stat(absolute_filename, &statbuf) != 0)
- statbuf.st_mtime = 0;
- version = get_module_version(f, str); /* -1 if not found */
- snprintf(name, l, "%s%s_O%s_M%0*lX_V%d",
- symprefix, m_name, absolute_filename,
- (int)(2 * sizeof(statbuf.st_mtime)), statbuf.st_mtime,
- version);
- sym = obj_add_symbol(f, name, -1,
- ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
- sec->idx, sec->header.sh_addr, 0);
- if (use_ksymtab)
- new_add_ksymtab(f, sym);
- }
- free(absolute_filename);
-#ifdef _NOT_SUPPORTED_
- /* record where the persistent data is going, same address as previous symbol */
-
- if (f->persist) {
- l = sizeof(symprefix) + /* "__insmod_" */
- lm_name + /* module name */
- 2 + /* "_P" */
- strlen(f->persist) + /* data store */
- 1; /* nul */
- name = xmalloc(l);
- snprintf(name, l, "%s%s_P%s",
- symprefix, m_name, f->persist);
- sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
- sec->idx, sec->header.sh_addr, 0);
- if (use_ksymtab)
- new_add_ksymtab(f, sym);
- }
-#endif /* _NOT_SUPPORTED_ */
- /* tag the desired sections if size is non-zero */
-
- for (i = 0; i < ARRAY_SIZE(section_names); ++i) {
- sec = obj_find_section(f, section_names[i]);
- if (sec && sec->header.sh_size) {
- l = sizeof(symprefix) + /* "__insmod_" */
- lm_name + /* module name */
- 2 + /* "_S" */
- strlen(sec->name) + /* section name */
- 2 + /* "_L" */
- 8 + /* length in dec */
- 1; /* nul */
- name = xmalloc(l);
- snprintf(name, l, "%s%s_S%s_L%ld",
- symprefix, m_name, sec->name,
- (long)sec->header.sh_size);
- sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
- sec->idx, sec->header.sh_addr, 0);
- if (use_ksymtab)
- new_add_ksymtab(f, sym);
- }
- }
-}
-#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
-
-#if ENABLE_FEATURE_INSMOD_LOAD_MAP
-static void print_load_map(struct obj_file *f)
-{
- struct obj_section *sec;
-#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
- struct obj_symbol **all, **p;
- int i, nsyms, *loaded;
- struct obj_symbol *sym;
-#endif
- /* Report on the section layout. */
-
- printf("Sections: Size %-*s Align\n",
- (int) (2 * sizeof(void *)), "Address");
-
- for (sec = f->load_order; sec; sec = sec->load_next) {
- int a;
- unsigned long tmp;
-
- for (a = -1, tmp = sec->header.sh_addralign; tmp; ++a)
- tmp >>= 1;
- if (a == -1)
- a = 0;
-
- printf("%-15s %08lx %0*lx 2**%d\n",
- sec->name,
- (long)sec->header.sh_size,
- (int) (2 * sizeof(void *)),
- (long)sec->header.sh_addr,
- a);
- }
-#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
- /* Quick reference which section indices are loaded. */
-
- i = f->header.e_shnum;
- loaded = alloca(sizeof(int) * i);
- while (--i >= 0)
- loaded[i] = ((f->sections[i]->header.sh_flags & SHF_ALLOC) != 0);
-
- /* Collect the symbols we'll be listing. */
-
- for (nsyms = i = 0; i < HASH_BUCKETS; ++i)
- for (sym = f->symtab[i]; sym; sym = sym->next)
- if (sym->secidx <= SHN_HIRESERVE
- && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx])
- ) {
- ++nsyms;
- }
-
- all = alloca(nsyms * sizeof(struct obj_symbol *));
-
- for (i = 0, p = all; i < HASH_BUCKETS; ++i)
- for (sym = f->symtab[i]; sym; sym = sym->next)
- if (sym->secidx <= SHN_HIRESERVE
- && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx])
- ) {
- *p++ = sym;
- }
-
- /* And list them. */
- printf("\nSymbols:\n");
- for (p = all; p < all + nsyms; ++p) {
- char type = '?';
- unsigned long value;
-
- sym = *p;
- if (sym->secidx == SHN_ABS) {
- type = 'A';
- value = sym->value;
- } else if (sym->secidx == SHN_UNDEF) {
- type = 'U';
- value = 0;
- } else {
- sec = f->sections[sym->secidx];
-
- if (sec->header.sh_type == SHT_NOBITS)
- type = 'B';
- else if (sec->header.sh_flags & SHF_ALLOC) {
- if (sec->header.sh_flags & SHF_EXECINSTR)
- type = 'T';
- else if (sec->header.sh_flags & SHF_WRITE)
- type = 'D';
- else
- type = 'R';
- }
- value = sym->value + sec->header.sh_addr;
- }
-
- if (ELF_ST_BIND(sym->info) == STB_LOCAL)
- type = tolower(type);
-
- printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value,
- type, sym->name);
- }
-#endif
-}
-#else /* !FEATURE_INSMOD_LOAD_MAP */
-void print_load_map(struct obj_file *f);
-#endif
-
-int insmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int insmod_main(int argc, char **argv)
-{
- char *opt_o, *arg1;
- int len;
- int k_crcs;
- char *tmp, *tmp1;
- unsigned long m_size;
- ElfW(Addr) m_addr;
- struct obj_file *f;
- struct stat st;
- char *m_name = NULL;
- int exit_status = EXIT_FAILURE;
- int m_has_modinfo;
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
- struct utsname uts_info;
- char m_strversion[STRVERSIONLEN];
- int m_version, m_crcs;
-#endif
-#if ENABLE_FEATURE_CLEAN_UP
- FILE *fp = NULL;
-#else
- FILE *fp;
-#endif
- int k_version = 0;
- struct utsname myuname;
-
- /* Parse any options */
- getopt32(argv, OPTION_STR, &opt_o);
- arg1 = argv[optind];
- if (option_mask32 & OPT_o) { // -o /* name the output module */
- free(m_name);
- m_name = xstrdup(opt_o);
- }
-
- if (arg1 == NULL) {
- bb_show_usage();
- }
-
- /* Grab the module name */
- tmp1 = xstrdup(arg1);
- tmp = basename(tmp1);
- len = strlen(tmp);
-
- if (uname(&myuname) == 0) {
- if (myuname.release[0] == '2') {
- k_version = myuname.release[2] - '0';
- }
- }
-
-#if ENABLE_FEATURE_2_6_MODULES
- if (k_version > 4 && len > 3 && tmp[len - 3] == '.'
- && tmp[len - 2] == 'k' && tmp[len - 1] == 'o'
- ) {
- len -= 3;
- tmp[len] = '\0';
- } else
-#endif
- if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') {
- len -= 2;
- tmp[len] = '\0';
- }
-
-
-#if ENABLE_FEATURE_2_6_MODULES
- if (k_version > 4)
- m_fullName = xasprintf("%s.ko", tmp);
- else
-#endif
- m_fullName = xasprintf("%s.o", tmp);
-
- if (!m_name) {
- m_name = tmp;
- } else {
- free(tmp1);
- tmp1 = NULL; /* flag for free(m_name) before exit() */
- }
-
- /* Get a filedesc for the module. Check that we have a complete path */
- if (stat(arg1, &st) < 0 || !S_ISREG(st.st_mode)
- || (fp = fopen_for_read(arg1)) == NULL
- ) {
- /* Hmm. Could not open it. First search under /lib/modules/`uname -r`,
- * but do not error out yet if we fail to find it... */
- if (k_version) { /* uname succeedd */
- char *module_dir;
- char *tmdn;
-
- tmdn = concat_path_file(CONFIG_DEFAULT_MODULES_DIR, myuname.release);
- /* Jump through hoops in case /lib/modules/`uname -r`
- * is a symlink. We do not want recursive_action to
- * follow symlinks, but we do want to follow the
- * /lib/modules/`uname -r` dir, So resolve it ourselves
- * if it is a link... */
- module_dir = xmalloc_readlink(tmdn);
- if (!module_dir)
- module_dir = xstrdup(tmdn);
- recursive_action(module_dir, ACTION_RECURSE,
- check_module_name_match, NULL, m_fullName, 0);
- free(module_dir);
- free(tmdn);
- }
-
- /* Check if we have found anything yet */
- if (!m_filename || ((fp = fopen_for_read(m_filename)) == NULL)) {
- int r;
- char *module_dir;
-
- free(m_filename);
- m_filename = NULL;
- module_dir = xmalloc_readlink(CONFIG_DEFAULT_MODULES_DIR);
- if (!module_dir)
- module_dir = xstrdup(CONFIG_DEFAULT_MODULES_DIR);
- /* No module found under /lib/modules/`uname -r`, this
- * time cast the net a bit wider. Search /lib/modules/ */
- r = recursive_action(module_dir, ACTION_RECURSE,
- check_module_name_match, NULL, m_fullName, 0);
- if (r)
- bb_error_msg_and_die("%s: module not found", m_fullName);
- free(module_dir);
- if (m_filename == NULL
- || ((fp = fopen_for_read(m_filename)) == NULL)
- ) {
- bb_error_msg_and_die("%s: module not found", m_fullName);
- }
- }
- } else
- m_filename = xstrdup(arg1);
-
- if (flag_verbose)
- printf("Using %s\n", m_filename);
-
-#if ENABLE_FEATURE_2_6_MODULES
- if (k_version > 4) {
- argv[optind] = m_filename;
- optind--;
- return insmod_ng_main(argc - optind, argv + optind);
- }
-#endif
-
- f = obj_load(fp, LOADBITS);
-
- if (get_modinfo_value(f, "kernel_version") == NULL)
- m_has_modinfo = 0;
- else
- m_has_modinfo = 1;
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
- /* Version correspondence? */
- if (!flag_quiet) {
- if (uname(&uts_info) < 0)
- uts_info.release[0] = '\0';
- if (m_has_modinfo) {
- m_version = new_get_module_version(f, m_strversion);
- if (m_version == -1) {
- bb_error_msg_and_die("cannot find the kernel version the module was "
- "compiled for");
- }
- }
-
- if (strncmp(uts_info.release, m_strversion, STRVERSIONLEN) != 0) {
- bb_error_msg("%skernel-module version mismatch\n"
- "\t%s was compiled for kernel version %s\n"
- "\twhile this kernel is version %s",
- flag_force_load ? "warning: " : "",
- m_filename, m_strversion, uts_info.release);
- if (!flag_force_load)
- goto out;
- }
- }
- k_crcs = 0;
-#endif /* FEATURE_INSMOD_VERSION_CHECKING */
-
- if (query_module(NULL, 0, NULL, 0, NULL))
- bb_error_msg_and_die("not configured to support old kernels");
- new_get_kernel_symbols();
- k_crcs = new_is_kernel_checksummed();
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
- m_crcs = 0;
- if (m_has_modinfo)
- m_crcs = new_is_module_checksummed(f);
-
- if (m_crcs != k_crcs)
- obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash);
-#endif /* FEATURE_INSMOD_VERSION_CHECKING */
-
- /* Let the module know about the kernel symbols. */
- add_kernel_symbols(f);
-
- /* Allocate common symbols, symbol tables, and string tables. */
-
- new_create_this_module(f, m_name);
- obj_check_undefineds(f);
- obj_allocate_commons(f);
- check_tainted_module(f, m_name);
-
- /* done with the module name, on to the optional var=value arguments */
- ++optind;
- if (optind < argc) {
- new_process_module_arguments(f, argc - optind, argv + optind);
- }
-
- arch_create_got(f);
- hide_special_symbols(f);
-
-#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
- add_ksymoops_symbols(f, m_filename, m_name);
-#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
-
- new_create_module_ksymtab(f);
-
- /* Find current size of the module */
- m_size = obj_load_size(f);
-
- m_addr = create_module(m_name, m_size);
- if (m_addr == (ElfW(Addr))(-1)) switch (errno) {
- case EEXIST:
- bb_error_msg_and_die("a module named %s already exists", m_name);
- case ENOMEM:
- bb_error_msg_and_die("can't allocate kernel memory for module; needed %lu bytes",
- m_size);
- default:
- bb_perror_msg_and_die("create_module: %s", m_name);
- }
-
-#if !LOADBITS
- /*
- * the PROGBITS section was not loaded by the obj_load
- * now we can load them directly into the kernel memory
- */
- if (!obj_load_progbits(fp, f, (char*)m_addr)) {
- delete_module(m_name, 0);
- goto out;
- }
-#endif
-
- if (!obj_relocate(f, m_addr)) {
- delete_module(m_name, 0);
- goto out;
- }
-
- if (!new_init_module(m_name, f, m_size)) {
- delete_module(m_name, 0);
- goto out;
- }
-
- if (flag_print_load_map)
- print_load_map(f);
-
- exit_status = EXIT_SUCCESS;
-
- out:
-#if ENABLE_FEATURE_CLEAN_UP
- if (fp)
- fclose(fp);
- free(tmp1);
- if (!tmp1)
- free(m_name);
- free(m_filename);
-#endif
- return exit_status;
-}
-
-#endif /* ENABLE_FEATURE_2_4_MODULES */
-/*
- * End of big piece of 2.4-specific code
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
+#include "libbb.h"
+#include "modutils.h"
-#if ENABLE_FEATURE_2_6_MODULES
-
-#include <sys/mman.h>
-
-#if defined __UCLIBC__ && !ENABLE_FEATURE_2_4_MODULES
-/* big time suckage. The old prototype above renders our nice fwd-decl wrong */
-extern int init_module(void *module, unsigned long len, const char *options);
-#else
-#include <asm/unistd.h>
-#include <sys/syscall.h>
-#define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts)
-#endif
-
-/* We use error numbers in a loose translation... */
-static const char *moderror(int err)
-{
- switch (err) {
- case ENOEXEC:
- return "invalid module format";
- case ENOENT:
- return "unknown symbol in module";
- case ESRCH:
- return "module has wrong symbol version";
- case EINVAL:
- return "invalid parameters";
- default:
- return strerror(err);
- }
-}
-
-#if !ENABLE_FEATURE_2_4_MODULES
int insmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int insmod_main(int argc UNUSED_PARAM, char **argv)
-#else
-static int insmod_ng_main(int argc UNUSED_PARAM, char **argv)
-#endif
{
- size_t len;
- int optlen;
- void *map;
- char *filename, *options;
+ char *filename;
+ int rc;
+
+ USE_FEATURE_2_4_MODULES(
+ getopt32(argv, INSMOD_OPTS INSMOD_ARGS);
+ argv += optind-1;
+ );
filename = *++argv;
if (!filename)
bb_show_usage();
- /* Rest is options */
- options = xzalloc(1);
- optlen = 0;
- while (*++argv) {
- options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
- /* Spaces handled by "" pairs, but no way of escaping quotes */
- optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
- }
-
-#if 0
- /* Any special reason why mmap? It isn't performance critical. -vda */
- /* Yes, xmalloc'ing can use *alot* of RAM. Don't forget that there are
- * modules out there that are half a megabyte! mmap()ing is way nicer
- * for small mem boxes, i guess. */
- /* But after load, these modules will take up that 0.5mb in kernel
- * anyway. Using malloc here causes only a transient spike to 1mb,
- * after module is loaded, we go back to normal 0.5mb usage
- * (in kernel). Also, mmap isn't magic - when we touch mapped data,
- * we use memory. -vda */
- int fd;
- struct stat st;
- unsigned long len;
- fd = xopen(filename, O_RDONLY);
- fstat(fd, &st);
- len = st.st_size;
- map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
- if (map == MAP_FAILED) {
- bb_perror_msg_and_die("cannot mmap '%s'", filename);
- }
+ rc = bb_init_module(filename, parse_cmdline_module_options(argv));
+ if (rc)
+ bb_error_msg("cannot insert '%s': %s", filename, moderror(rc));
- /* map == NULL on Blackfin, probably on other MMU-less systems too. Workaround. */
- if (map == NULL) {
- map = xmalloc(len);
- xread(fd, map, len);
- }
-#else
- len = MAXINT(ssize_t);
- map = xmalloc_xopen_read_close(filename, &len);
-#endif
-
- if (init_module(map, len, options) != 0)
- bb_error_msg_and_die("cannot insert '%s': %s",
- filename, moderror(errno));
- return 0;
+ return rc;
}
-
-#endif
* Mini lsmod implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
- *
- * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
- * Nicolas Ferre <nicolas.ferre@alcove.fr> to support pre 2.1 kernels
- * (which lack the query_module() interface).
+ * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
-
-#if !ENABLE_FEATURE_CHECK_TAINTED_MODULE
-static void check_tainted(void) { bb_putchar('\n'); }
-#else
-#define TAINT_FILENAME "/proc/sys/kernel/tainted"
-#define TAINT_PROPRIETORY_MODULE (1<<0)
-#define TAINT_FORCED_MODULE (1<<1)
-#define TAINT_UNSAFE_SMP (1<<2)
+#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
+enum {
+ TAINT_PROPRIETORY_MODULE = (1 << 0),
+ TAINT_FORCED_MODULE = (1 << 1),
+ TAINT_UNSAFE_SMP = (1 << 2),
+};
static void check_tainted(void)
{
- int tainted;
- FILE *f;
-
- tainted = 0;
- f = fopen_for_read(TAINT_FILENAME);
- if (f) {
- fscanf(f, "%d", &tainted);
- fclose(f);
+ int tainted = 0;
+ char *buf = xmalloc_open_read_close("/proc/sys/kernel/tainted", NULL);
+ if (buf) {
+ tainted = atoi(buf);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(buf);
}
+
if (tainted) {
printf(" Tainted: %c%c%c\n",
tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
} else {
- printf(" Not tainted\n");
+ puts(" Not tainted");
}
}
+#else
+static void check_tainted(void) { putchar('\n'); }
#endif
-#if ENABLE_FEATURE_QUERY_MODULE_INTERFACE
-
-struct module_info
-{
- unsigned long addr;
- unsigned long size;
- unsigned long flags;
- long usecount;
-};
-
-
-int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
-
-enum {
-/* Values for query_module's which. */
- QM_MODULES = 1,
- QM_DEPS = 2,
- QM_REFS = 3,
- QM_SYMBOLS = 4,
- QM_INFO = 5,
-
-/* Bits of module.flags. */
- NEW_MOD_RUNNING = 1,
- NEW_MOD_DELETED = 2,
- NEW_MOD_AUTOCLEAN = 4,
- NEW_MOD_VISITED = 8,
- NEW_MOD_USED_ONCE = 16,
- NEW_MOD_INITIALIZING = 64
-};
-
int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
- struct module_info info;
- char *module_names, *mn, *deps, *dn;
- size_t bufsize, depsize, nmod, count, i, j;
-
- module_names = deps = NULL;
- bufsize = depsize = 0;
- while (query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) {
- if (errno != ENOSPC) bb_perror_msg_and_die("QM_MODULES");
- module_names = xmalloc(bufsize = nmod);
- }
-
- deps = xmalloc(depsize = 256);
- printf("Module\t\t\tSize Used by");
+#if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT
+ char *token[4];
+ parser_t *parser = config_open("/proc/modules");
+ printf("Module Size Used by"); //vda!
check_tainted();
- for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) {
- if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) {
- if (errno == ENOENT) {
- /* The module was removed out from underneath us. */
- continue;
- }
- /* else choke */
- bb_perror_msg_and_die("module %s: QM_INFO", mn);
+ if (ENABLE_FEATURE_2_4_MODULES
+ && get_linux_version_code() < KERNEL_VERSION(2,6,0)
+ ) {
+ while (config_read(parser, token, 4, 3, "# \t", PARSE_NORMAL)) {
+ if (token[3] != NULL && token[3][0] == '[') {
+ token[3]++;
+ token[3][strlen(token[3])-1] = '\0';
+ } else
+ token[3] = (char *) "";
+ printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
}
- while (query_module(mn, QM_REFS, deps, depsize, &count)) {
- if (errno == ENOENT) {
- /* The module was removed out from underneath us. */
- continue;
- } else if (errno != ENOSPC)
- bb_perror_msg_and_die("module %s: QM_REFS", mn);
- deps = xrealloc(deps, count);
- }
- printf("%-20s%8lu%4ld", mn, info.size, info.usecount);
- if (info.flags & NEW_MOD_DELETED)
- printf(" (deleted)");
- else if (info.flags & NEW_MOD_INITIALIZING)
- printf(" (initializing)");
- else if (!(info.flags & NEW_MOD_RUNNING))
- printf(" (uninitialized)");
- else {
- if (info.flags & NEW_MOD_AUTOCLEAN)
- printf(" (autoclean) ");
- if (!(info.flags & NEW_MOD_USED_ONCE))
- printf(" (unused)");
- }
- if (count)
- printf(" [");
- for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) {
- printf("%s%s", dn, (j==count-1)? "":" ");
- }
- if (count)
- bb_putchar(']');
-
- bb_putchar('\n');
- }
-
-#if ENABLE_FEATURE_CLEAN_UP
- free(module_names);
-#endif
-
- return 0;
-}
-
-#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
-
-int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
-{
- FILE *file = xfopen_for_read("/proc/modules");
-
- printf("Module Size Used by");
- check_tainted();
-#if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT
- {
- char *line;
- while ((line = xmalloc_fgets(file)) != NULL) {
- char *tok;
-
- tok = strtok(line, " \t");
- printf("%-19s", tok);
- tok = strtok(NULL, " \t\n");
- printf(" %8s", tok);
- tok = strtok(NULL, " \t\n");
- /* Null if no module unloading support. */
- if (tok) {
- printf(" %s", tok);
- tok = strtok(NULL, "\n");
- if (!tok)
- tok = (char*)"";
- /* New-style has commas, or -. If so,
- truncate (other fields might follow). */
- else if (strchr(tok, ',')) {
- tok = strtok(tok, "\t ");
- /* Strip trailing comma. */
- if (tok[strlen(tok)-1] == ',')
- tok[strlen(tok)-1] = '\0';
- } else if (tok[0] == '-'
- && (tok[1] == '\0' || isspace(tok[1]))
- ) {
- tok = (char*)"";
- }
- printf(" %s", tok);
- }
- bb_putchar('\n');
- free(line);
+ } else {
+ while (config_read(parser, token, 4, 4, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {
+ // N.B. token[3] is either '-' (module is not used by others)
+ // or comma-separated list ended by comma
+ // so trimming the trailing char is just what we need!
+ token[3][strlen(token[3])-1] = '\0';
+ printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
}
- fclose(file);
}
+ if (ENABLE_FEATURE_CLEAN_UP)
+ config_close(parser);
#else
- xprint_and_close_file(file);
-#endif /* CONFIG_FEATURE_2_6_MODULES */
+ check_tainted();
+ xprint_and_close_file(xfopen_for_read("/proc/modules"));
+#endif
return EXIT_SUCCESS;
}
-
-#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
/*
* Modprobe written from scratch for BusyBox
*
- * Copyright (c) 2002 by Robert Griebl, griebl@gmx.de
- * Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
- * Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com
- *
- * Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr
+ * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
+ * Copyright (c) 2008 Vladimir Dronnikov
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
-*/
+ */
#include "libbb.h"
+#include "modutils.h"
#include <sys/utsname.h>
#include <fnmatch.h>
-#define line_buffer bb_common_bufsiz1
-
-struct mod_opt_t { /* one-way list of options to pass to a module */
- char * m_opt_val;
- struct mod_opt_t * m_next;
-};
-
-struct dep_t { /* one-way list of dependency rules */
- /* a dependency rule */
- char * m_name; /* the module name*/
- char * m_path; /* the module file path */
- struct mod_opt_t * m_options; /* the module options */
-
- unsigned int m_isalias :1; /* the module is an alias */
- unsigned int m_isblacklisted:1; /* the module is blacklisted */
- unsigned int m_reserved :14; /* stuffin' */
-
- unsigned int m_depcnt :16; /* the number of dependable module(s) */
- char ** m_deparr; /* the list of dependable module(s) */
-
- struct dep_t * m_next; /* the next dependency rule */
+struct modprobe_option {
+ char *module;
+ char *option;
};
-struct mod_list_t { /* two-way list of modules to process */
- /* a module description */
- const char * m_name;
- char * m_path;
- struct mod_opt_t * m_options;
-
- struct mod_list_t * m_prev;
- struct mod_list_t * m_next;
+struct modprobe_conf {
+ char probename[MODULE_NAME_LEN];
+ llist_t *options;
+ llist_t *aliases;
+#if ENABLE_FEATURE_MODPROBE_BLACKLIST
+#define add_to_blacklist(conf, name) llist_add_to(&conf->blacklist, name)
+#define check_blacklist(conf, name) (llist_find(conf->blacklist, name) == NULL)
+ llist_t *blacklist;
+#else
+#define add_to_blacklist(conf, name) do {} while (0)
+#define check_blacklist(conf, name) (1)
+#endif
};
-struct include_conf_t {
- struct dep_t *first;
- struct dep_t *current;
+#define MODPROBE_OPTS "acdlnrt:VC:" USE_FEATURE_MODPROBE_BLACKLIST("b")
+enum {
+ MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
+ MODPROBE_OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << 1), /* c */
+ MODPROBE_OPT_D = (INSMOD_OPT_UNUSED << 2), /* d */
+ MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 3), /* l */
+ MODPROBE_OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << 4), /* n */
+ MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 5), /* r */
+ MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << 6), /* t */
+ MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << 7), /* V */
+ MODPROBE_OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << 8), /* C */
+ MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 9) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
};
-static struct dep_t *depend;
-
-#define MAIN_OPT_STR "acdklnqrst:vVC:"
-#define INSERT_ALL 1 /* a */
-#define DUMP_CONF_EXIT 2 /* c */
-#define D_OPT_IGNORED 4 /* d */
-#define AUTOCLEAN_FLG 8 /* k */
-#define LIST_ALL 16 /* l */
-#define SHOW_ONLY 32 /* n */
-#define QUIET 64 /* q */
-#define REMOVE_OPT 128 /* r */
-#define DO_SYSLOG 256 /* s */
-#define RESTRICT_DIR 512 /* t */
-#define VERBOSE 1024 /* v */
-#define VERSION_ONLY 2048 /* V */
-#define CONFIG_FILE 4096 /* C */
-
-#define autoclean (option_mask32 & AUTOCLEAN_FLG)
-#define show_only (option_mask32 & SHOW_ONLY)
-#define quiet (option_mask32 & QUIET)
-#define remove_opt (option_mask32 & REMOVE_OPT)
-#define do_syslog (option_mask32 & DO_SYSLOG)
-#define verbose (option_mask32 & VERBOSE)
-
-static int parse_tag_value(char *buffer, char **ptag, char **pvalue)
-{
- char *tag, *value;
-
- buffer = skip_whitespace(buffer);
- tag = value = buffer;
- while (!isspace(*value)) {
- if (!*value)
- return 0;
- value++;
- }
- *value++ = '\0';
- value = skip_whitespace(value);
- if (!*value)
- return 0;
-
- *ptag = tag;
- *pvalue = value;
-
- return 1;
-}
-
-/*
- * This function appends an option to a list
- */
-static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt)
-{
- struct mod_opt_t *ol = opt_list;
-
- if (ol) {
- while (ol->m_next) {
- ol = ol->m_next;
- }
- ol->m_next = xzalloc(sizeof(struct mod_opt_t));
- ol = ol->m_next;
- } else {
- ol = opt_list = xzalloc(sizeof(struct mod_opt_t));
- }
-
- ol->m_opt_val = xstrdup(opt);
- /*ol->m_next = NULL; - done by xzalloc*/
-
- return opt_list;
-}
-
-#if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS
-/* static char* parse_command_string(char* src, char **dst);
- * src: pointer to string containing argument
- * dst: pointer to where to store the parsed argument
- * return value: the pointer to the first char after the parsed argument,
- * NULL if there was no argument parsed (only trailing spaces).
- * Note that memory is allocated with xstrdup when a new argument was
- * parsed. Don't forget to free it!
- */
-#define ARG_EMPTY 0x00
-#define ARG_IN_DQUOTES 0x01
-#define ARG_IN_SQUOTES 0x02
-static char *parse_command_string(char *src, char **dst)
-{
- int opt_status = ARG_EMPTY;
- char* tmp_str;
-
- /* Dumb you, I have nothing to do... */
- if (src == NULL) return src;
-
- /* Skip leading spaces */
- while (*src == ' ') {
- src++;
- }
- /* Is the end of string reached? */
- if (*src == '\0') {
- return NULL;
- }
- /* Reached the start of an argument
- * By the way, we duplicate a little too much
- * here but what is too much is freed later. */
- *dst = tmp_str = xstrdup(src);
- /* Get to the end of that argument */
- while (*tmp_str != '\0'
- && (*tmp_str != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)))
- ) {
- switch (*tmp_str) {
- case '\'':
- if (opt_status & ARG_IN_DQUOTES) {
- /* Already in double quotes, keep current char as is */
- } else {
- /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
- memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
- /* mark me: we enter or leave single quotes */
- opt_status ^= ARG_IN_SQUOTES;
- /* Back one char, as we need to re-scan the new char there. */
- tmp_str--;
- }
- break;
- case '"':
- if (opt_status & ARG_IN_SQUOTES) {
- /* Already in single quotes, keep current char as is */
- } else {
- /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
- memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
- /* mark me: we enter or leave double quotes */
- opt_status ^= ARG_IN_DQUOTES;
- /* Back one char, as we need to re-scan the new char there. */
- tmp_str--;
- }
- break;
- case '\\':
- if (opt_status & ARG_IN_SQUOTES) {
- /* Between single quotes: keep as is. */
- } else {
- switch (*(tmp_str+1)) {
- case 'a':
- case 'b':
- case 't':
- case 'n':
- case 'v':
- case 'f':
- case 'r':
- case '0':
- /* We escaped a special character. For now, keep
- * both the back-slash and the following char. */
- tmp_str++;
- src++;
- break;
- default:
- /* We escaped a space or a single or double quote,
- * or a back-slash, or a non-escapable char. Remove
- * the '\' and keep the new current char as is. */
- memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
- break;
- }
- }
- break;
- /* Any other char that is special shall appear here.
- * Example: $ starts a variable
- case '$':
- do_variable_expansion();
- break;
- * */
- default:
- /* any other char is kept as is. */
- break;
- }
- tmp_str++; /* Go to next char */
- src++; /* Go to next char to find the end of the argument. */
- }
- /* End of string, but still no ending quote */
- if (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)) {
- bb_error_msg_and_die("unterminated (single or double) quote in options list: %s", src);
- }
- *tmp_str++ = '\0';
- *dst = xrealloc(*dst, (tmp_str - *dst));
- return src;
-}
-#else
-#define parse_command_string(src, dst) (0)
-#endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
-
-static int is_conf_command(char *buffer, const char *command)
-{
- int len = strlen(command);
- return ((strstr(buffer, command) == buffer) &&
- isspace(buffer[len]));
-}
-
-/*
- * This function reads aliases and default module options from a configuration file
- * (/etc/modprobe.conf syntax). It supports includes (only files, no directories).
- */
+static llist_t *loaded;
-static int FAST_FUNC include_conf_file_act(const char *filename,
- struct stat *statbuf UNUSED_PARAM,
- void *userdata,
- int depth UNUSED_PARAM);
+static int read_config(struct modprobe_conf *conf, const char *path);
-static int FAST_FUNC include_conf_dir_act(const char *filename UNUSED_PARAM,
- struct stat *statbuf UNUSED_PARAM,
- void *userdata UNUSED_PARAM,
- int depth)
+static void add_option(llist_t **all_opts, const char *module, const char *opts)
{
- if (depth > 1)
- return SKIP;
+ struct modprobe_option *o;
- return TRUE;
+ o = xzalloc(sizeof(struct modprobe_option));
+ if (module)
+ o->module = filename2modname(module, NULL);
+ o->option = xstrdup(opts);
+ llist_add_to(all_opts, o);
}
-static int include_conf_recursive(struct include_conf_t *conf, const char *filename)
+static int FAST_FUNC config_file_action(const char *filename,
+ struct stat *statbuf UNUSED_PARAM,
+ void *userdata,
+ int depth UNUSED_PARAM)
{
- return recursive_action(filename, ACTION_RECURSE,
- include_conf_file_act,
- include_conf_dir_act,
- conf, 1);
-}
-
-static int FAST_FUNC include_conf_file_act(const char *filename,
- struct stat *statbuf UNUSED_PARAM,
- void *userdata,
- int depth UNUSED_PARAM)
-{
- struct include_conf_t *conf = (struct include_conf_t *) userdata;
- struct dep_t **first = &conf->first;
- struct dep_t **current = &conf->current;
- int continuation_line = 0;
- FILE *f;
+ struct modprobe_conf *conf = (struct modprobe_conf *) userdata;
+ RESERVE_CONFIG_BUFFER(modname, MODULE_NAME_LEN);
+ char *tokens[3];
+ parser_t *p;
+ int rc = TRUE;
if (bb_basename(filename)[0] == '.')
- return TRUE;
-
- f = fopen_for_read(filename);
- if (f == NULL)
- return FALSE;
-
- // alias parsing is not 100% correct (no correct handling of continuation lines within an alias)!
-
- while (fgets(line_buffer, sizeof(line_buffer), f)) {
- int l;
+ goto error;
- *strchrnul(line_buffer, '#') = '\0';
-
- l = strlen(line_buffer);
-
- while (l && isspace(line_buffer[l-1])) {
- line_buffer[l-1] = '\0';
- l--;
- }
-
- if (l == 0) {
- continuation_line = 0;
- continue;
- }
-
- if (continuation_line)
- continue;
-
- if (is_conf_command(line_buffer, "alias")) {
- char *alias, *mod;
-
- if (parse_tag_value(line_buffer + 6, &alias, &mod)) {
- /* handle alias as a module dependent on the aliased module */
- if (!*current) {
- (*first) = (*current) = xzalloc(sizeof(struct dep_t));
- } else {
- (*current)->m_next = xzalloc(sizeof(struct dep_t));
- (*current) = (*current)->m_next;
- }
- (*current)->m_name = xstrdup(alias);
- (*current)->m_isalias = 1;
-
- if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) {
- /*(*current)->m_depcnt = 0; - done by xzalloc */
- /*(*current)->m_deparr = 0;*/
- } else {
- (*current)->m_depcnt = 1;
- (*current)->m_deparr = xmalloc(sizeof(char *));
- (*current)->m_deparr[0] = xstrdup(mod);
- }
- /*(*current)->m_next = NULL; - done by xzalloc */
- }
- } else if (is_conf_command(line_buffer, "options")) {
- char *mod, *opt;
-
- /* split the line in the module/alias name, and options */
- if (parse_tag_value(line_buffer + 8, &mod, &opt)) {
- struct dep_t *dt;
-
- /* find the corresponding module */
- for (dt = *first; dt; dt = dt->m_next) {
- if (strcmp(dt->m_name, mod) == 0)
- break;
- }
- if (dt) {
- if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) {
- char* new_opt = NULL;
- while ((opt = parse_command_string(opt, &new_opt))) {
- dt->m_options = append_option(dt->m_options, new_opt);
- }
- } else {
- dt->m_options = append_option(dt->m_options, opt);
- }
- }
- }
- } else if (is_conf_command(line_buffer, "include")) {
- char *includefile;
+ p = config_open2(filename, fopen_for_read);
+ if (p == NULL) {
+ rc = FALSE;
+ goto error;
+ }
- includefile = skip_whitespace(line_buffer + 8);
- include_conf_recursive(conf, includefile);
+ while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
+ if (strcmp(tokens[0], "alias") == 0) {
+ filename2modname(tokens[1], modname);
+ if (tokens[2] &&
+ fnmatch(modname, conf->probename, 0) == 0)
+ llist_add_to(&conf->aliases,
+ filename2modname(tokens[2], NULL));
+ } else if (strcmp(tokens[0], "options") == 0) {
+ if (tokens[2])
+ add_option(&conf->options, tokens[1], tokens[2]);
+ } else if (strcmp(tokens[0], "include") == 0) {
+ read_config(conf, tokens[1]);
} else if (ENABLE_FEATURE_MODPROBE_BLACKLIST &&
- (is_conf_command(line_buffer, "blacklist"))) {
- char *mod;
- struct dep_t *dt;
-
- mod = skip_whitespace(line_buffer + 10);
- for (dt = *first; dt; dt = dt->m_next) {
- if (strcmp(dt->m_name, mod) == 0)
- break;
- }
- if (dt)
- dt->m_isblacklisted = 1;
+ strcmp(tokens[0], "blacklist") == 0) {
+ add_to_blacklist(conf, xstrdup(tokens[1]));
}
- } /* while (fgets(...)) */
-
- fclose(f);
- return TRUE;
-}
-
-static int include_conf_file(struct include_conf_t *conf,
- const char *filename)
-{
- return include_conf_file_act(filename, NULL, conf, 0);
-}
-
-static int include_conf_file2(struct include_conf_t *conf,
- const char *filename, const char *oldname)
-{
- if (include_conf_file(conf, filename) == TRUE)
- return TRUE;
- return include_conf_file(conf, oldname);
-}
-
-/*
- * This function builds a list of dependency rules from /lib/modules/`uname -r`/modules.dep.
- * It then fills every modules and aliases with their default options, found by parsing
- * modprobe.conf (or modules.conf, or conf.modules).
- */
-static struct dep_t *build_dep(void)
-{
- FILE *f;
- struct utsname un;
- struct include_conf_t conf = { NULL, NULL };
- char *filename;
- int continuation_line = 0;
- int k_version;
-
- uname(&un); /* never fails */
-
- k_version = 0;
- if (un.release[0] == '2') {
- k_version = un.release[2] - '0';
}
-
- filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/"CONFIG_DEFAULT_DEPMOD_FILE, un.release);
- f = fopen_for_read(filename);
+ config_close(p);
+error:
if (ENABLE_FEATURE_CLEAN_UP)
- free(filename);
- if (f == NULL) {
- /* Ok, that didn't work. Fall back to looking in /lib/modules */
- f = fopen_for_read(CONFIG_DEFAULT_MODULES_DIR"/"CONFIG_DEFAULT_DEPMOD_FILE);
- if (f == NULL) {
- bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE);
- }
- }
-
- while (fgets(line_buffer, sizeof(line_buffer), f)) {
- int l = strlen(line_buffer);
- char *p = NULL;
-
- while (l > 0 && isspace(line_buffer[l-1])) {
- line_buffer[l-1] = '\0';
- l--;
- }
-
- if (l == 0) {
- continuation_line = 0;
- continue;
- }
-
- /* Is this a new module dep description? */
- if (!continuation_line) {
- /* find the dep beginning */
- char *col = strchr(line_buffer, ':');
- char *dot = col;
-
- if (col) {
- /* This line is a dep description */
- const char *mods;
- char *modpath;
- char *mod;
-
- /* Find the beginning of the module file name */
- *col = '\0';
- mods = bb_basename(line_buffer);
-
- /* find the path of the module */
- modpath = strchr(line_buffer, '/'); /* ... and this is the path */
- if (!modpath)
- modpath = line_buffer; /* module with no path */
- /* find the end of the module name in the file name */
- if (ENABLE_FEATURE_2_6_MODULES &&
- (k_version > 4) && (col[-3] == '.') &&
- (col[-2] == 'k') && (col[-1] == 'o'))
- dot = col - 3;
- else if ((col[-2] == '.') && (col[-1] == 'o'))
- dot = col - 2;
-
- mod = xstrndup(mods, dot - mods);
-
- /* enqueue new module */
- if (!conf.current) {
- conf.first = conf.current = xzalloc(sizeof(struct dep_t));
- } else {
- conf.current->m_next = xzalloc(sizeof(struct dep_t));
- conf.current = conf.current->m_next;
- }
- conf.current->m_name = mod;
- conf.current->m_path = xstrdup(modpath);
- /*current->m_options = NULL; - xzalloc did it*/
- /*current->m_isalias = 0;*/
- /*current->m_depcnt = 0;*/
- /*current->m_deparr = 0;*/
- /*current->m_next = 0;*/
-
- p = col + 1;
- } else
- /* this line is not a dep description */
- p = NULL;
- } else
- /* It's a dep description continuation */
- p = line_buffer;
-
- /* p points to the first dependable module; if NULL, no dependable module */
- if (p && (p = skip_whitespace(p))[0] != '\0') {
- char *end = &line_buffer[l-1];
- const char *deps;
- char *dep;
- char *next;
- int ext = 0;
-
- while (isblank(*end) || (*end == '\\'))
- end--;
-
- do {
- /* search the end of the dependency */
- next = strchr(p, ' ');
- if (next) {
- *next = '\0';
- next--;
- } else
- next = end;
-
- /* find the beginning of the module file name */
- deps = bb_basename(p);
- if (deps == p)
- deps = skip_whitespace(deps);
-
- /* find the end of the module name in the file name */
- if (ENABLE_FEATURE_2_6_MODULES
- && (k_version > 4) && (next[-2] == '.')
- && (next[-1] == 'k') && (next[0] == 'o'))
- ext = 3;
- else if ((next[-1] == '.') && (next[0] == 'o'))
- ext = 2;
-
- /* Cope with blank lines */
- if ((next - deps - ext + 1) <= 0)
- continue;
- dep = xstrndup(deps, next - deps - ext + 1);
-
- /* Add the new dependable module name */
- conf.current->m_deparr = xrealloc_vector(conf.current->m_deparr, 2, conf.current->m_depcnt);
- conf.current->m_deparr[conf.current->m_depcnt++] = dep;
-
- p = next + 2;
- } while (next < end);
- }
-
- /* is there other dependable module(s) ? */
- continuation_line = (line_buffer[l-1] == '\\');
- } /* while (fgets(...)) */
- fclose(f);
-
- /*
- * First parse system-specific options and aliases
- * as they take precedence over the kernel ones.
- * >=2.6: we only care about modprobe.conf
- * <=2.4: we care about modules.conf and conf.modules
- */
- {
- int r = FALSE;
-
- if (ENABLE_FEATURE_2_6_MODULES) {
- if (include_conf_file(&conf, "/etc/modprobe.conf"))
- r = TRUE;
- if (include_conf_recursive(&conf, "/etc/modprobe.d"))
- r = TRUE;
- }
- if (ENABLE_FEATURE_2_4_MODULES && !r)
- include_conf_file2(&conf,
- "/etc/modules.conf",
- "/etc/conf.modules");
- }
-
- /* Only 2.6 has a modules.alias file */
- if (ENABLE_FEATURE_2_6_MODULES) {
- /* Parse kernel-declared module aliases */
- filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.alias", un.release);
- include_conf_file2(&conf,
- filename,
- CONFIG_DEFAULT_MODULES_DIR"/modules.alias");
- if (ENABLE_FEATURE_CLEAN_UP)
- free(filename);
-
- /* Parse kernel-declared symbol aliases */
- filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.symbols", un.release);
- include_conf_file2(&conf,
- filename,
- CONFIG_DEFAULT_MODULES_DIR"/modules.symbols");
- if (ENABLE_FEATURE_CLEAN_UP)
- free(filename);
- }
-
- return conf.first;
-}
-
-/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
-static int already_loaded(const char *name)
-{
- FILE *f;
- int ret;
-
- f = fopen_for_read("/proc/modules");
- if (f == NULL)
- return -1;
-
- ret = 0;
- while (fgets(line_buffer, sizeof(line_buffer), f)) {
- char *p = line_buffer;
- const char *n = name;
-
- while (1) {
- char cn = *n;
- char cp = *p;
- if (cp == ' ' || cp == '\0') {
- if (cn == '\0') {
- ret = 1; /* match! */
- goto done;
- }
- break; /* no match on this line, take next one */
- }
- if (cn == '-') cn = '_';
- if (cp == '-') cp = '_';
- if (cp != cn)
- break; /* no match on this line, take next one */
- n++;
- p++;
- }
- }
- done:
- fclose(f);
- return ret;
+ RELEASE_CONFIG_BUFFER(modname);
+ return rc;
}
-static int mod_process(const struct mod_list_t *list, int do_insert)
+static int read_config(struct modprobe_conf *conf, const char *path)
{
- int rc = 0;
- char **argv = NULL;
- struct mod_opt_t *opts;
- int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */
- int argc;
-
- while (list) {
- argc = 0;
- if (ENABLE_FEATURE_CLEAN_UP)
- argc_malloc = 0;
- /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory
- * each time we allocate memory for argv.
- * But it is (quite) small amounts of memory that leak each
- * time a module is loaded, and it is reclaimed when modprobe
- * exits anyway (even when standalone shell? Yes --vda).
- * This could become a problem when loading a module with LOTS of
- * dependencies, with LOTS of options for each dependencies, with
- * very little memory on the target... But in that case, the module
- * would not load because there is no more memory, so there's no
- * problem. */
- /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */
- argv = xmalloc(6 * sizeof(char*));
- if (do_insert) {
- if (already_loaded(list->m_name) != 1) {
- argv[argc++] = (char*)"insmod";
- if (ENABLE_FEATURE_2_4_MODULES) {
- if (do_syslog)
- argv[argc++] = (char*)"-s";
- if (autoclean)
- argv[argc++] = (char*)"-k";
- if (quiet)
- argv[argc++] = (char*)"-q";
- else if (verbose) /* verbose and quiet are mutually exclusive */
- argv[argc++] = (char*)"-v";
- }
- argv[argc++] = list->m_path;
- if (ENABLE_FEATURE_CLEAN_UP)
- argc_malloc = argc;
- opts = list->m_options;
- while (opts) {
- /* Add one more option */
- argc++;
- argv = xrealloc(argv, (argc + 1) * sizeof(char*));
- argv[argc-1] = opts->m_opt_val;
- opts = opts->m_next;
- }
- }
- } else {
- /* modutils uses short name for removal */
- if (already_loaded(list->m_name) != 0) {
- argv[argc++] = (char*)"rmmod";
- if (do_syslog)
- argv[argc++] = (char*)"-s";
- argv[argc++] = (char*)list->m_name;
- if (ENABLE_FEATURE_CLEAN_UP)
- argc_malloc = argc;
- }
- }
- argv[argc] = NULL;
-
- if (argc) {
- if (verbose) {
- printf("%s module %s\n", do_insert?"Loading":"Unloading", list->m_name);
- }
- if (!show_only) {
- int rc2 = wait4pid(spawn(argv));
-
- if (do_insert) {
- rc = rc2; /* only last module matters */
- } else if (!rc2) {
- rc = 0; /* success if remove any mod */
- }
- }
- if (ENABLE_FEATURE_CLEAN_UP) {
- /* the last value in the array has index == argc, but
- * it is the terminating NULL, so we must not free it. */
- while (argc_malloc < argc) {
- free(argv[argc_malloc++]);
- }
- }
- }
- if (ENABLE_FEATURE_CLEAN_UP) {
- free(argv);
- argv = NULL;
- }
- list = do_insert ? list->m_prev : list->m_next;
- }
- return (show_only) ? 0 : rc;
+ return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
+ config_file_action, NULL, conf, 1);
}
-/*
- * Check the matching between a pattern and a module name.
- * We need this as *_* is equivalent to *-*, even in pattern matching.
- */
-static int check_pattern(const char* pat_src, const char* mod_src)
+static char *gather_options(llist_t *first, const char *module, int usecmdline)
{
- int ret;
-
- if (ENABLE_FEATURE_MODPROBE_FANCY_ALIAS) {
- char* pat;
- char* mod;
- char* p;
+ struct modprobe_option *opt;
+ llist_t *n;
+ char *opts = xstrdup("");
+ int optlen = 0;
- pat = xstrdup(pat_src);
- mod = xstrdup(mod_src);
+ for (n = first; n != NULL; n = n->link) {
+ opt = (struct modprobe_option *) n->data;
- for (p = pat; (p = strchr(p, '-')); *p++ = '_');
- for (p = mod; (p = strchr(p, '-')); *p++ = '_');
-
- ret = fnmatch(pat, mod, 0);
-
- if (ENABLE_FEATURE_CLEAN_UP) {
- free(pat);
- free(mod);
- }
+ if (opt->module == NULL && !usecmdline)
+ continue;
+ if (opt->module != NULL && strcmp(opt->module, module) != 0)
+ continue;
- return ret;
+ opts = xrealloc(opts, optlen + strlen(opt->option) + 2);
+ optlen += sprintf(opts + optlen, "%s ", opt->option);
}
- return fnmatch(pat_src, mod_src, 0);
+ return opts;
}
-/*
- * Builds the dependency list (aka stack) of a module.
- * head: the highest module in the stack (last to insmod, first to rmmod)
- * tail: the lowest module in the stack (first to insmod, last to rmmod)
- */
-static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **tail)
+static int do_modprobe(struct modprobe_conf *conf, const char *module)
{
- struct mod_list_t *find;
- struct dep_t *dt;
- struct mod_opt_t *opt = NULL;
- char *path = NULL;
-
- /* Search for the given module name amongst all dependency rules.
- * The module name in a dependency rule can be a shell pattern,
- * so try to match the given module name against such a pattern.
- * Of course if the name in the dependency rule is a plain string,
- * then we consider it a pattern, and matching will still work. */
- for (dt = depend; dt; dt = dt->m_next) {
- if (check_pattern(dt->m_name, mod) == 0) {
- break;
- }
- }
-
- if (!dt) {
- bb_error_msg("module %s not found", mod);
- return;
- }
+ RESERVE_CONFIG_BUFFER(modname, MODULE_NAME_LEN);
+ llist_t *deps = NULL;
+ char *fn, *options, *colon = NULL, *tokens[2];
+ parser_t *p;
+ int rc = -1;
+
+ p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, fopen_for_read);
+ if (p == NULL)
+ goto error;
+
+ while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
+ colon = last_char_is(tokens[0], ':');
+ if (colon == NULL)
+ continue;
- // resolve alias names
- while (dt->m_isalias) {
- if (dt->m_depcnt == 1) {
- struct dep_t *adt;
+ filename2modname(tokens[0], modname);
+ if (strcmp(modname, module) == 0)
+ break;
- for (adt = depend; adt; adt = adt->m_next) {
- if (check_pattern(adt->m_name, dt->m_deparr[0]) == 0 &&
- !(ENABLE_FEATURE_MODPROBE_BLACKLIST &&
- adt->m_isblacklisted))
- break;
- }
- if (adt) {
- /* This is the module we are aliased to */
- struct mod_opt_t *opts = dt->m_options;
- /* Option of the alias are appended to the options of the module */
- while (opts) {
- adt->m_options = append_option(adt->m_options, opts->m_opt_val);
- opts = opts->m_next;
- }
- dt = adt;
- } else {
- bb_error_msg("module %s not found", mod);
- return;
- }
- } else {
- bb_error_msg("bad alias %s", dt->m_name);
- return;
- }
+ colon = NULL;
}
-
- mod = dt->m_name;
- path = dt->m_path;
- opt = dt->m_options;
-
- // search for duplicates
- for (find = *head; find; find = find->m_next) {
- if (strcmp(mod, find->m_name) == 0) {
- // found -> dequeue it
-
- if (find->m_prev)
- find->m_prev->m_next = find->m_next;
- else
- *head = find->m_next;
-
- if (find->m_next)
- find->m_next->m_prev = find->m_prev;
- else
- *tail = find->m_prev;
-
- break; // there can be only one duplicate
+ if (colon == NULL)
+ goto error_not_found;
+
+ colon[0] = '\0';
+ llist_add_to(&deps, xstrdup(tokens[0]));
+ if (tokens[1])
+ string_to_llist(tokens[1], &deps, " ");
+
+ if (!(option_mask32 & MODPROBE_OPT_REMOVE))
+ deps = llist_rev(deps);
+
+ rc = 0;
+ while (deps && rc == 0) {
+ fn = llist_pop(&deps);
+ filename2modname(fn, modname);
+ if (option_mask32 & MODPROBE_OPT_REMOVE) {
+ if (bb_delete_module(modname, O_EXCL) != 0)
+ rc = errno;
+ } else if (llist_find(loaded, modname) == NULL) {
+ options = gather_options(conf->options, modname,
+ strcmp(modname, module) == 0);
+ rc = bb_init_module(fn, options);
+ if (rc == 0)
+ llist_add_to(&loaded, xstrdup(modname));
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(options);
}
- }
-
- if (!find) { // did not find a duplicate
- find = xzalloc(sizeof(struct mod_list_t));
- find->m_name = mod;
- find->m_path = path;
- find->m_options = opt;
- }
-
- // enqueue at tail
- if (*tail)
- (*tail)->m_next = find;
- find->m_prev = *tail;
- find->m_next = NULL; /* possibly NOT done by xzalloc! */
-
- if (!*head)
- *head = find;
- *tail = find;
-
- if (dt) {
- int i;
- /* Add all dependable module for that new module */
- for (i = 0; i < dt->m_depcnt; i++)
- check_dep(dt->m_deparr[i], head, tail);
- }
-}
-
-static int mod_insert(char **argv)
-{
- struct mod_list_t *tail = NULL;
- struct mod_list_t *head = NULL;
- char *modname = *argv++;
- int rc;
-
- // get dep list for module mod
- check_dep(modname, &head, &tail);
-
- rc = 1;
- if (head && tail) {
- while (*argv)
- head->m_options = append_option(head->m_options, *argv++);
-
- // process tail ---> head
- rc = mod_process(tail, 1);
- if (rc) {
- /*
- * In case of using udev, multiple instances of modprobe can be
- * spawned to load the same module (think of two same usb devices,
- * for example; or cold-plugging at boot time). Thus we shouldn't
- * fail if the module was loaded, and not by us.
- */
- if (already_loaded(modname))
- rc = 0;
- }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(fn);
}
- return rc;
-}
-
-static int mod_remove(char *modname)
-{
- static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
-
- int rc;
- struct mod_list_t *head = NULL;
- struct mod_list_t *tail = NULL;
- if (modname)
- check_dep(modname, &head, &tail);
- else // autoclean
- head = tail = (struct mod_list_t*) &rm_a_dummy;
-
- rc = 1;
- if (head && tail)
- rc = mod_process(head, 0); // process head ---> tail
+error_not_found:
+ config_close(p);
+error:
+ if (ENABLE_FEATURE_CLEAN_UP)
+ RELEASE_CONFIG_BUFFER(modname);
+ if (rc > 0 && !(option_mask32 & INSMOD_OPT_SILENT))
+ bb_error_msg("Failed to %sload module %s: %s.",
+ (option_mask32 & MODPROBE_OPT_REMOVE) ? "un" : "",
+ module, moderror(rc));
return rc;
}
int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int modprobe_main(int argc UNUSED_PARAM, char **argv)
{
- int rc = EXIT_SUCCESS;
- unsigned opt;
- char *unused;
+ struct utsname uts;
+ int num_modules, i, rc;
+ llist_t *options = NULL;
+ parser_t *parser;
opt_complementary = "q-v:v-q";
- opt = getopt32(argv, MAIN_OPT_STR, &unused, &unused);
+ getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS,
+ NULL, NULL);
argv += optind;
-
- if (opt & (DUMP_CONF_EXIT | LIST_ALL))
- return EXIT_SUCCESS;
- if (opt & (RESTRICT_DIR | CONFIG_FILE))
- bb_error_msg_and_die("-t and -C not supported");
-
- depend = build_dep();
-
- if (!depend)
- bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE);
-
- if (remove_opt) {
- do {
- /* (*argv) can be NULL here */
- if (mod_remove(*argv)) {
- bb_perror_msg("failed to %s module %s", "remove",
- *argv);
- rc = EXIT_FAILURE;
- }
- } while (*argv && *++argv);
+ argc -= optind;
+
+ if (option_mask32 & (MODPROBE_OPT_DUMP_ONLY | MODPROBE_OPT_LIST_ONLY |
+ MODPROBE_OPT_SHOW_ONLY))
+ bb_error_msg_and_die("not supported");
+
+ /* goto modules location */
+ xchdir(CONFIG_DEFAULT_MODULES_DIR);
+ uname(&uts);
+ xchdir(uts.release);
+
+ if (option_mask32 & (MODPROBE_OPT_REMOVE | MODPROBE_OPT_INSERT_ALL)) {
+ /* each parameter is a module name */
+ num_modules = argc;
+ if (num_modules == 0) {
+ if (bb_delete_module(NULL, O_NONBLOCK|O_EXCL) != 0)
+ bb_perror_msg_and_die("rmmod");
+ return EXIT_SUCCESS;
+ }
} else {
- if (!*argv)
- bb_error_msg_and_die("no module or pattern provided");
+ /* the only module, the rest of parameters are options */
+ num_modules = 1;
+ add_option(&options, NULL, parse_cmdline_module_options(argv));
+ }
- if (mod_insert(argv))
- bb_perror_msg_and_die("failed to %s module %s", "load", *argv);
+ /* cache modules */
+ parser = config_open2("/proc/modules", fopen_for_read);
+ if (parser) {
+ char *s;
+ while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
+ llist_add_to(&loaded, xstrdup(s));
+ config_close(parser);
}
- /* Here would be a good place to free up memory allocated during the dependencies build. */
+ for (i = 0; i < num_modules; i++) {
+ struct modprobe_conf *conf;
+
+ conf = xzalloc(sizeof(struct modprobe_conf));
+ conf->options = options;
+ filename2modname(argv[i], conf->probename);
+ read_config(conf, "/etc/modprobe.conf");
+ read_config(conf, "/etc/modprobe.d");
+ if (ENABLE_FEATURE_MODUTILS_SYMBOLS &&
+ conf->aliases == NULL && strncmp(argv[i], "symbol:", 7) == 0)
+ read_config(conf, "modules.symbols");
+
+ if (ENABLE_FEATURE_MODUTILS_ALIAS && conf->aliases == NULL)
+ read_config(conf, "modules.alias");
+
+ if (conf->aliases == NULL) {
+ /* Try if module by literal name is found; literal
+ * names are blacklist only if '-b' is given. */
+ if (!(option_mask32 & MODPROBE_OPT_BLACKLIST) ||
+ check_blacklist(conf, conf->probename)) {
+ rc = do_modprobe(conf, conf->probename);
+ if (rc < 0 && !(option_mask32 & INSMOD_OPT_SILENT))
+ bb_error_msg("Module %s not found.", argv[i]);
+ }
+ } else {
+ /* Probe all aliases */
+ while (conf->aliases != NULL) {
+ char *realname = llist_pop(&conf->aliases);
+ if (check_blacklist(conf, realname))
+ do_modprobe(conf, realname);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(realname);
+ }
+ }
+ }
- return rc;
+ return EXIT_SUCCESS;
}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini insmod implementation for busybox
+ *
+ * This version of insmod supports ARM, CRIS, H8/300, x86, ia64, x86_64,
+ * m68k, MIPS, PowerPC, S390, SH3/4/5, Sparc, v850e, and x86_64.
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * and Ron Alder <alder@lineo.com>
+ *
+ * Rodney Radford <rradford@mindspring.com> 17-Aug-2004.
+ * Added x86_64 support.
+ *
+ * Miles Bader <miles@gnu.org> added NEC V850E support.
+ *
+ * Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4
+ * and (theoretically) SH3. I have only tested SH4 in little endian mode.
+ *
+ * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
+ * Nicolas Ferre <nicolas.ferre@alcove.fr> to support ARM7TDMI. Only
+ * very minor changes required to also work with StrongArm and presumably
+ * all ARM based systems.
+ *
+ * Yoshinori Sato <ysato@users.sourceforge.jp> 19-May-2004.
+ * added Renesas H8/300 support.
+ *
+ * Paul Mundt <lethal@linux-sh.org> 08-Aug-2003.
+ * Integrated support for sh64 (SH-5), from preliminary modutils
+ * patches from Benedict Gaster <benedict.gaster@superh.com>.
+ * Currently limited to support for 32bit ABI.
+ *
+ * Magnus Damm <damm@opensource.se> 22-May-2002.
+ * The plt and got code are now using the same structs.
+ * Added generic linked list code to fully support PowerPC.
+ * Replaced the mess in arch_apply_relocation() with architecture blocks.
+ * The arch_create_got() function got cleaned up with architecture blocks.
+ * These blocks should be easy maintain and sync with obj_xxx.c in modutils.
+ *
+ * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001.
+ * PowerPC specific code stolen from modutils-2.3.16,
+ * written by Paul Mackerras, Copyright 1996, 1997 Linux International.
+ * I've only tested the code on mpc8xx platforms in big-endian mode.
+ * Did some cleanup and added USE_xxx_ENTRIES...
+ *
+ * Quinn Jensen <jensenq@lineo.com> added MIPS support 23-Feb-2001.
+ * based on modutils-2.4.2
+ * MIPS specific support for Elf loading and relocation.
+ * Copyright 1996, 1997 Linux International.
+ * Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu>
+ *
+ * Based almost entirely on the Linux modutils-2.3.11 implementation.
+ * Copyright 1996, 1997 Linux International.
+ * New implementation contributed by Richard Henderson <rth@tamu.edu>
+ * Based on original work by Bjorn Ekwall <bj0rn@blox.se>
+ * Restructured (and partly rewritten) by:
+ * Björn Ekwall <bj0rn@blox.se> February 1999
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+#include "modutils.h"
+#include <libgen.h>
+#include <sys/utsname.h>
+
+#if ENABLE_FEATURE_INSMOD_LOADINKMEM
+#define LOADBITS 0
+#else
+#define LOADBITS 1
+#endif
+
+/* Alpha */
+#if defined(__alpha__)
+#define MATCH_MACHINE(x) (x == EM_ALPHA)
+#define SHT_RELM SHT_RELA
+#define Elf64_RelM Elf64_Rela
+#define ELFCLASSM ELFCLASS64
+#endif
+
+/* ARM support */
+#if defined(__arm__)
+#define MATCH_MACHINE(x) (x == EM_ARM)
+#define SHT_RELM SHT_REL
+#define Elf32_RelM Elf32_Rel
+#define ELFCLASSM ELFCLASS32
+#define USE_PLT_ENTRIES
+#define PLT_ENTRY_SIZE 8
+#define USE_GOT_ENTRIES
+#define GOT_ENTRY_SIZE 8
+#define USE_SINGLE
+#endif
+
+/* blackfin */
+#if defined(BFIN)
+#define MATCH_MACHINE(x) (x == EM_BLACKFIN)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#endif
+
+/* CRIS */
+#if defined(__cris__)
+#define MATCH_MACHINE(x) (x == EM_CRIS)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#ifndef EM_CRIS
+#define EM_CRIS 76
+#define R_CRIS_NONE 0
+#define R_CRIS_32 3
+#endif
+#endif
+
+/* H8/300 */
+#if defined(__H8300H__) || defined(__H8300S__)
+#define MATCH_MACHINE(x) (x == EM_H8_300)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#define USE_SINGLE
+#define SYMBOL_PREFIX "_"
+#endif
+
+/* PA-RISC / HP-PA */
+#if defined(__hppa__)
+#define MATCH_MACHINE(x) (x == EM_PARISC)
+#define SHT_RELM SHT_RELA
+#if defined(__LP64__)
+#define Elf64_RelM Elf64_Rela
+#define ELFCLASSM ELFCLASS64
+#else
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#endif
+#endif
+
+/* x86 */
+#if defined(__i386__)
+#ifndef EM_486
+#define MATCH_MACHINE(x) (x == EM_386)
+#else
+#define MATCH_MACHINE(x) (x == EM_386 || x == EM_486)
+#endif
+#define SHT_RELM SHT_REL
+#define Elf32_RelM Elf32_Rel
+#define ELFCLASSM ELFCLASS32
+#define USE_GOT_ENTRIES
+#define GOT_ENTRY_SIZE 4
+#define USE_SINGLE
+#endif
+
+/* IA64, aka Itanium */
+#if defined(__ia64__)
+#define MATCH_MACHINE(x) (x == EM_IA_64)
+#define SHT_RELM SHT_RELA
+#define Elf64_RelM Elf64_Rela
+#define ELFCLASSM ELFCLASS64
+#endif
+
+/* m68k */
+#if defined(__mc68000__)
+#define MATCH_MACHINE(x) (x == EM_68K)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#define USE_GOT_ENTRIES
+#define GOT_ENTRY_SIZE 4
+#define USE_SINGLE
+#endif
+
+/* Microblaze */
+#if defined(__microblaze__)
+#define USE_SINGLE
+#include <linux/elf-em.h>
+#define MATCH_MACHINE(x) (x == EM_XILINX_MICROBLAZE)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#endif
+
+/* MIPS */
+#if defined(__mips__)
+#define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE)
+#define SHT_RELM SHT_REL
+#define Elf32_RelM Elf32_Rel
+#define ELFCLASSM ELFCLASS32
+/* Account for ELF spec changes. */
+#ifndef EM_MIPS_RS3_LE
+#ifdef EM_MIPS_RS4_BE
+#define EM_MIPS_RS3_LE EM_MIPS_RS4_BE
+#else
+#define EM_MIPS_RS3_LE 10
+#endif
+#endif /* !EM_MIPS_RS3_LE */
+#define ARCHDATAM "__dbe_table"
+#endif
+
+/* Nios II */
+#if defined(__nios2__)
+#define MATCH_MACHINE(x) (x == EM_ALTERA_NIOS2)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#endif
+
+/* PowerPC */
+#if defined(__powerpc64__)
+#define MATCH_MACHINE(x) (x == EM_PPC64)
+#define SHT_RELM SHT_RELA
+#define Elf64_RelM Elf64_Rela
+#define ELFCLASSM ELFCLASS64
+#elif defined(__powerpc__)
+#define MATCH_MACHINE(x) (x == EM_PPC)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#define USE_PLT_ENTRIES
+#define PLT_ENTRY_SIZE 16
+#define USE_PLT_LIST
+#define LIST_ARCHTYPE ElfW(Addr)
+#define USE_LIST
+#define ARCHDATAM "__ftr_fixup"
+#endif
+
+/* S390 */
+#if defined(__s390__)
+#define MATCH_MACHINE(x) (x == EM_S390)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#define USE_PLT_ENTRIES
+#define PLT_ENTRY_SIZE 8
+#define USE_GOT_ENTRIES
+#define GOT_ENTRY_SIZE 8
+#define USE_SINGLE
+#endif
+
+/* SuperH */
+#if defined(__sh__)
+#define MATCH_MACHINE(x) (x == EM_SH)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#define USE_GOT_ENTRIES
+#define GOT_ENTRY_SIZE 4
+#define USE_SINGLE
+/* the SH changes have only been tested in =little endian= mode */
+/* I'm not sure about big endian, so let's warn: */
+#if defined(__sh__) && BB_BIG_ENDIAN
+# error insmod.c may require changes for use on big endian SH
+#endif
+/* it may or may not work on the SH1/SH2... Error on those also */
+#if ((!(defined(__SH3__) || defined(__SH4__) || defined(__SH5__)))) && (defined(__sh__))
+#error insmod.c may require changes for SH1 or SH2 use
+#endif
+#endif
+
+/* Sparc */
+#if defined(__sparc__)
+#define MATCH_MACHINE(x) (x == EM_SPARC)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#endif
+
+/* v850e */
+#if defined(__v850e__)
+#define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+#define ELFCLASSM ELFCLASS32
+#define USE_PLT_ENTRIES
+#define PLT_ENTRY_SIZE 8
+#define USE_SINGLE
+#ifndef EM_CYGNUS_V850 /* grumble */
+#define EM_CYGNUS_V850 0x9080
+#endif
+#define SYMBOL_PREFIX "_"
+#endif
+
+/* X86_64 */
+#if defined(__x86_64__)
+#define MATCH_MACHINE(x) (x == EM_X86_64)
+#define SHT_RELM SHT_RELA
+#define USE_GOT_ENTRIES
+#define GOT_ENTRY_SIZE 8
+#define USE_SINGLE
+#define Elf64_RelM Elf64_Rela
+#define ELFCLASSM ELFCLASS64
+#endif
+
+#ifndef SHT_RELM
+#error Sorry, but insmod.c does not yet support this architecture...
+#endif
+
+
+//----------------------------------------------------------------------------
+//--------modutils module.h, lines 45-242
+//----------------------------------------------------------------------------
+
+/* Definitions for the Linux module syscall interface.
+ Copyright 1996, 1997 Linux International.
+
+ Contributed by Richard Henderson <rth@tamu.edu>
+
+ This file is part of the Linux modutils.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2 of the License, or (at your
+ option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+
+#ifndef MODUTILS_MODULE_H
+
+/*======================================================================*/
+/* For sizeof() which are related to the module platform and not to the
+ environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */
+
+#define tgt_sizeof_char sizeof(char)
+#define tgt_sizeof_short sizeof(short)
+#define tgt_sizeof_int sizeof(int)
+#define tgt_sizeof_long sizeof(long)
+#define tgt_sizeof_char_p sizeof(char *)
+#define tgt_sizeof_void_p sizeof(void *)
+#define tgt_long long
+
+#if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64)
+#undef tgt_sizeof_long
+#undef tgt_sizeof_char_p
+#undef tgt_sizeof_void_p
+#undef tgt_long
+enum {
+ tgt_sizeof_long = 8,
+ tgt_sizeof_char_p = 8,
+ tgt_sizeof_void_p = 8
+};
+#define tgt_long long long
+#endif
+
+/*======================================================================*/
+/* The structures used in Linux 2.1. */
+
+/* Note: new_module_symbol does not use tgt_long intentionally */
+struct new_module_symbol {
+ unsigned long value;
+ unsigned long name;
+};
+
+struct new_module_persist;
+
+struct new_module_ref {
+ unsigned tgt_long dep; /* kernel addresses */
+ unsigned tgt_long ref;
+ unsigned tgt_long next_ref;
+};
+
+struct new_module {
+ unsigned tgt_long size_of_struct; /* == sizeof(module) */
+ unsigned tgt_long next;
+ unsigned tgt_long name;
+ unsigned tgt_long size;
+
+ tgt_long usecount;
+ unsigned tgt_long flags; /* AUTOCLEAN et al */
+
+ unsigned nsyms;
+ unsigned ndeps;
+
+ unsigned tgt_long syms;
+ unsigned tgt_long deps;
+ unsigned tgt_long refs;
+ unsigned tgt_long init;
+ unsigned tgt_long cleanup;
+ unsigned tgt_long ex_table_start;
+ unsigned tgt_long ex_table_end;
+#ifdef __alpha__
+ unsigned tgt_long gp;
+#endif
+ /* Everything after here is extension. */
+ unsigned tgt_long persist_start;
+ unsigned tgt_long persist_end;
+ unsigned tgt_long can_unload;
+ unsigned tgt_long runsize;
+ const char *kallsyms_start; /* All symbols for kernel debugging */
+ const char *kallsyms_end;
+ const char *archdata_start; /* arch specific data for module */
+ const char *archdata_end;
+ const char *kernel_data; /* Reserved for kernel internal use */
+};
+
+#ifdef ARCHDATAM
+#define ARCHDATA_SEC_NAME ARCHDATAM
+#else
+#define ARCHDATA_SEC_NAME "__archdata"
+#endif
+#define KALLSYMS_SEC_NAME "__kallsyms"
+
+
+struct new_module_info {
+ unsigned long addr;
+ unsigned long size;
+ unsigned long flags;
+ long usecount;
+};
+
+/* Bits of module.flags. */
+enum {
+ NEW_MOD_RUNNING = 1,
+ NEW_MOD_DELETED = 2,
+ NEW_MOD_AUTOCLEAN = 4,
+ NEW_MOD_VISITED = 8,
+ NEW_MOD_USED_ONCE = 16
+};
+
+int init_module(const char *name, const struct new_module *);
+int query_module(const char *name, int which, void *buf,
+ size_t bufsize, size_t *ret);
+
+/* Values for query_module's which. */
+enum {
+ QM_MODULES = 1,
+ QM_DEPS = 2,
+ QM_REFS = 3,
+ QM_SYMBOLS = 4,
+ QM_INFO = 5
+};
+
+/*======================================================================*/
+/* The system calls unchanged between 2.0 and 2.1. */
+
+unsigned long create_module(const char *, size_t);
+int delete_module(const char *module, unsigned int flags);
+
+
+#endif /* module.h */
+
+//----------------------------------------------------------------------------
+//--------end of modutils module.h
+//----------------------------------------------------------------------------
+
+
+
+//----------------------------------------------------------------------------
+//--------modutils obj.h, lines 253-462
+//----------------------------------------------------------------------------
+
+/* Elf object file loading and relocation routines.
+ Copyright 1996, 1997 Linux International.
+
+ Contributed by Richard Henderson <rth@tamu.edu>
+
+ This file is part of the Linux modutils.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2 of the License, or (at your
+ option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+
+#ifndef MODUTILS_OBJ_H
+
+/* The relocatable object is manipulated using elfin types. */
+
+#include <elf.h>
+#include <endian.h>
+
+#ifndef ElfW
+# if ELFCLASSM == ELFCLASS32
+# define ElfW(x) Elf32_ ## x
+# define ELFW(x) ELF32_ ## x
+# else
+# define ElfW(x) Elf64_ ## x
+# define ELFW(x) ELF64_ ## x
+# endif
+#endif
+
+/* For some reason this is missing from some ancient C libraries.... */
+#ifndef ELF32_ST_INFO
+# define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
+#endif
+
+#ifndef ELF64_ST_INFO
+# define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
+#endif
+
+#define ELF_ST_BIND(info) ELFW(ST_BIND)(info)
+#define ELF_ST_TYPE(info) ELFW(ST_TYPE)(info)
+#define ELF_ST_INFO(bind, type) ELFW(ST_INFO)(bind, type)
+#define ELF_R_TYPE(val) ELFW(R_TYPE)(val)
+#define ELF_R_SYM(val) ELFW(R_SYM)(val)
+
+struct obj_string_patch;
+struct obj_symbol_patch;
+
+struct obj_section
+{
+ ElfW(Shdr) header;
+ const char *name;
+ char *contents;
+ struct obj_section *load_next;
+ int idx;
+};
+
+struct obj_symbol
+{
+ struct obj_symbol *next; /* hash table link */
+ const char *name;
+ unsigned long value;
+ unsigned long size;
+ int secidx; /* the defining section index/module */
+ int info;
+ int ksymidx; /* for export to the kernel symtab */
+ int referenced; /* actually used in the link */
+};
+
+/* Hardcode the hash table size. We shouldn't be needing so many
+ symbols that we begin to degrade performance, and we get a big win
+ by giving the compiler a constant divisor. */
+
+#define HASH_BUCKETS 521
+
+struct obj_file {
+ ElfW(Ehdr) header;
+ ElfW(Addr) baseaddr;
+ struct obj_section **sections;
+ struct obj_section *load_order;
+ struct obj_section **load_order_search_start;
+ struct obj_string_patch *string_patches;
+ struct obj_symbol_patch *symbol_patches;
+ int (*symbol_cmp)(const char *, const char *);
+ unsigned long (*symbol_hash)(const char *);
+ unsigned long local_symtab_size;
+ struct obj_symbol **local_symtab;
+ struct obj_symbol *symtab[HASH_BUCKETS];
+};
+
+enum obj_reloc {
+ obj_reloc_ok,
+ obj_reloc_overflow,
+ obj_reloc_dangerous,
+ obj_reloc_unhandled
+};
+
+struct obj_string_patch {
+ struct obj_string_patch *next;
+ int reloc_secidx;
+ ElfW(Addr) reloc_offset;
+ ElfW(Addr) string_offset;
+};
+
+struct obj_symbol_patch {
+ struct obj_symbol_patch *next;
+ int reloc_secidx;
+ ElfW(Addr) reloc_offset;
+ struct obj_symbol *sym;
+};
+
+
+/* Generic object manipulation routines. */
+
+static unsigned long obj_elf_hash(const char *);
+
+static unsigned long obj_elf_hash_n(const char *, unsigned long len);
+
+static struct obj_symbol *obj_find_symbol(struct obj_file *f,
+ const char *name);
+
+static ElfW(Addr) obj_symbol_final_value(struct obj_file *f,
+ struct obj_symbol *sym);
+
+#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
+static void obj_set_symbol_compare(struct obj_file *f,
+ int (*cmp)(const char *, const char *),
+ unsigned long (*hash)(const char *));
+#endif
+
+static struct obj_section *obj_find_section(struct obj_file *f,
+ const char *name);
+
+static void obj_insert_section_load_order(struct obj_file *f,
+ struct obj_section *sec);
+
+static struct obj_section *obj_create_alloced_section(struct obj_file *f,
+ const char *name,
+ unsigned long align,
+ unsigned long size);
+
+static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
+ const char *name,
+ unsigned long align,
+ unsigned long size);
+
+static void *obj_extend_section(struct obj_section *sec, unsigned long more);
+
+static void obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
+ const char *string);
+
+static void obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
+ struct obj_symbol *sym);
+
+static void obj_check_undefineds(struct obj_file *f);
+
+static void obj_allocate_commons(struct obj_file *f);
+
+static unsigned long obj_load_size(struct obj_file *f);
+
+static int obj_relocate(struct obj_file *f, ElfW(Addr) base);
+
+static struct obj_file *obj_load(FILE *f, int loadprogbits);
+
+static int obj_create_image(struct obj_file *f, char *image);
+
+/* Architecture specific manipulation routines. */
+
+static struct obj_file *arch_new_file(void);
+
+static struct obj_section *arch_new_section(void);
+
+static struct obj_symbol *arch_new_symbol(void);
+
+static enum obj_reloc arch_apply_relocation(struct obj_file *f,
+ struct obj_section *targsec,
+ /*struct obj_section *symsec,*/
+ struct obj_symbol *sym,
+ ElfW(RelM) *rel, ElfW(Addr) value);
+
+static void arch_create_got(struct obj_file *f);
+#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
+static int obj_gpl_license(struct obj_file *f, const char **license);
+#endif /* FEATURE_CHECK_TAINTED_MODULE */
+#endif /* obj.h */
+//----------------------------------------------------------------------------
+//--------end of modutils obj.h
+//----------------------------------------------------------------------------
+
+
+/* SPFX is always a string, so it can be concatenated to string constants. */
+#ifdef SYMBOL_PREFIX
+#define SPFX SYMBOL_PREFIX
+#else
+#define SPFX ""
+#endif
+
+enum { STRVERSIONLEN = 64 };
+
+/*======================================================================*/
+
+#define flag_force_load (option_mask32 & INSMOD_OPT_FORCE)
+#define flag_autoclean (option_mask32 & INSMOD_OPT_KERNELD)
+#define flag_verbose (option_mask32 & INSMOD_OPT_VERBOSE)
+#define flag_quiet (option_mask32 & INSMOD_OPT_SILENT)
+#define flag_noexport (option_mask32 & INSMOD_OPT_NO_EXPORT)
+#define flag_print_load_map (option_mask32 & INSMOD_OPT_PRINT_MAP)
+
+/*======================================================================*/
+
+#if defined(USE_LIST)
+
+struct arch_list_entry
+{
+ struct arch_list_entry *next;
+ LIST_ARCHTYPE addend;
+ int offset;
+ int inited : 1;
+};
+
+#endif
+
+#if defined(USE_SINGLE)
+
+struct arch_single_entry
+{
+ int offset;
+ int inited : 1;
+ int allocated : 1;
+};
+
+#endif
+
+#if defined(__mips__)
+struct mips_hi16
+{
+ struct mips_hi16 *next;
+ ElfW(Addr) *addr;
+ ElfW(Addr) value;
+};
+#endif
+
+struct arch_file {
+ struct obj_file root;
+#if defined(USE_PLT_ENTRIES)
+ struct obj_section *plt;
+#endif
+#if defined(USE_GOT_ENTRIES)
+ struct obj_section *got;
+#endif
+#if defined(__mips__)
+ struct mips_hi16 *mips_hi16_list;
+#endif
+};
+
+struct arch_symbol {
+ struct obj_symbol root;
+#if defined(USE_PLT_ENTRIES)
+#if defined(USE_PLT_LIST)
+ struct arch_list_entry *pltent;
+#else
+ struct arch_single_entry pltent;
+#endif
+#endif
+#if defined(USE_GOT_ENTRIES)
+ struct arch_single_entry gotent;
+#endif
+};
+
+
+struct external_module {
+ const char *name;
+ ElfW(Addr) addr;
+ int used;
+ size_t nsyms;
+ struct new_module_symbol *syms;
+};
+
+static struct new_module_symbol *ksyms;
+static size_t nksyms;
+
+static struct external_module *ext_modules;
+static int n_ext_modules;
+static int n_ext_modules_used;
+
+/*======================================================================*/
+
+
+static struct obj_file *arch_new_file(void)
+{
+ struct arch_file *f;
+ f = xzalloc(sizeof(*f));
+ return &f->root; /* it's a first member */
+}
+
+static struct obj_section *arch_new_section(void)
+{
+ return xzalloc(sizeof(struct obj_section));
+}
+
+static struct obj_symbol *arch_new_symbol(void)
+{
+ struct arch_symbol *sym;
+ sym = xzalloc(sizeof(*sym));
+ return &sym->root;
+}
+
+static enum obj_reloc
+arch_apply_relocation(struct obj_file *f,
+ struct obj_section *targsec,
+ /*struct obj_section *symsec,*/
+ struct obj_symbol *sym,
+ ElfW(RelM) *rel, ElfW(Addr) v)
+{
+#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) \
+ || defined(__sh__) || defined(__s390__) || defined(__x86_64__) \
+ || defined(__powerpc__) || defined(__mips__)
+ struct arch_file *ifile = (struct arch_file *) f;
+#endif
+ enum obj_reloc ret = obj_reloc_ok;
+ ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset);
+#if defined(__arm__) || defined(__H8300H__) || defined(__H8300S__) \
+ || defined(__i386__) || defined(__mc68000__) || defined(__microblaze__) \
+ || defined(__mips__) || defined(__nios2__) || defined(__powerpc__) \
+ || defined(__s390__) || defined(__sh__) || defined(__x86_64__)
+ ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset;
+#endif
+#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
+ struct arch_symbol *isym = (struct arch_symbol *) sym;
+#endif
+#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) \
+ || defined(__sh__) || defined(__s390__)
+#if defined(USE_GOT_ENTRIES)
+ ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0;
+#endif
+#endif
+#if defined(USE_PLT_ENTRIES)
+ ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
+ unsigned long *ip;
+# if defined(USE_PLT_LIST)
+ struct arch_list_entry *pe;
+# else
+ struct arch_single_entry *pe;
+# endif
+#endif
+
+ switch (ELF_R_TYPE(rel->r_info)) {
+
+#if defined(__arm__)
+
+ case R_ARM_NONE:
+ break;
+
+ case R_ARM_ABS32:
+ *loc += v;
+ break;
+
+ case R_ARM_GOT32:
+ goto bb_use_got;
+
+ case R_ARM_GOTPC:
+ /* relative reloc, always to _GLOBAL_OFFSET_TABLE_
+ * (which is .got) similar to branch,
+ * but is full 32 bits relative */
+
+ *loc += got - dot;
+ break;
+
+ case R_ARM_PC24:
+ case R_ARM_PLT32:
+ goto bb_use_plt;
+
+ case R_ARM_GOTOFF: /* address relative to the got */
+ *loc += v - got;
+ break;
+
+#elif defined(__cris__)
+
+ case R_CRIS_NONE:
+ break;
+
+ case R_CRIS_32:
+ /* CRIS keeps the relocation value in the r_addend field and
+ * should not use whats in *loc at all
+ */
+ *loc = v;
+ break;
+
+#elif defined(__H8300H__) || defined(__H8300S__)
+
+ case R_H8_DIR24R8:
+ loc = (ElfW(Addr) *)((ElfW(Addr))loc - 1);
+ *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v);
+ break;
+ case R_H8_DIR24A8:
+ *loc += v;
+ break;
+ case R_H8_DIR32:
+ case R_H8_DIR32A16:
+ *loc += v;
+ break;
+ case R_H8_PCREL16:
+ v -= dot + 2;
+ if ((ElfW(Sword))v > 0x7fff ||
+ (ElfW(Sword))v < -(ElfW(Sword))0x8000)
+ ret = obj_reloc_overflow;
+ else
+ *(unsigned short *)loc = v;
+ break;
+ case R_H8_PCREL8:
+ v -= dot + 1;
+ if ((ElfW(Sword))v > 0x7f ||
+ (ElfW(Sword))v < -(ElfW(Sword))0x80)
+ ret = obj_reloc_overflow;
+ else
+ *(unsigned char *)loc = v;
+ break;
+
+#elif defined(__i386__)
+
+ case R_386_NONE:
+ break;
+
+ case R_386_32:
+ *loc += v;
+ break;
+
+ case R_386_PLT32:
+ case R_386_PC32:
+ case R_386_GOTOFF:
+ *loc += v - dot;
+ break;
+
+ case R_386_GLOB_DAT:
+ case R_386_JMP_SLOT:
+ *loc = v;
+ break;
+
+ case R_386_RELATIVE:
+ *loc += f->baseaddr;
+ break;
+
+ case R_386_GOTPC:
+ *loc += got - dot;
+ break;
+
+ case R_386_GOT32:
+ goto bb_use_got;
+ break;
+
+#elif defined(__microblaze__)
+ case R_MICROBLAZE_NONE:
+ case R_MICROBLAZE_64_NONE:
+ case R_MICROBLAZE_32_SYM_OP_SYM:
+ case R_MICROBLAZE_32_PCREL:
+ break;
+
+ case R_MICROBLAZE_64_PCREL: {
+ /* dot is the address of the current instruction.
+ * v is the target symbol address.
+ * So we need to extract the offset in the code,
+ * adding v, then subtrating the current address
+ * of this instruction.
+ * Ex: "IMM 0xFFFE bralid 0x0000" = "bralid 0xFFFE0000"
+ */
+
+ /* Get split offset stored in code */
+ unsigned int temp = (loc[0] & 0xFFFF) << 16 |
+ (loc[1] & 0xFFFF);
+
+ /* Adjust relative offset. -4 adjustment required
+ * because dot points to the IMM insn, but branch
+ * is computed relative to the branch instruction itself.
+ */
+ temp += v - dot - 4;
+
+ /* Store back into code */
+ loc[0] = (loc[0] & 0xFFFF0000) | temp >> 16;
+ loc[1] = (loc[1] & 0xFFFF0000) | (temp & 0xFFFF);
+
+ break;
+ }
+
+ case R_MICROBLAZE_32:
+ *loc += v;
+ break;
+
+ case R_MICROBLAZE_64: {
+ /* Get split pointer stored in code */
+ unsigned int temp1 = (loc[0] & 0xFFFF) << 16 |
+ (loc[1] & 0xFFFF);
+
+ /* Add reloc offset */
+ temp1+=v;
+
+ /* Store back into code */
+ loc[0] = (loc[0] & 0xFFFF0000) | temp1 >> 16;
+ loc[1] = (loc[1] & 0xFFFF0000) | (temp1 & 0xFFFF);
+
+ break;
+ }
+
+ case R_MICROBLAZE_32_PCREL_LO:
+ case R_MICROBLAZE_32_LO:
+ case R_MICROBLAZE_SRO32:
+ case R_MICROBLAZE_SRW32:
+ ret = obj_reloc_unhandled;
+ break;
+
+#elif defined(__mc68000__)
+
+ case R_68K_NONE:
+ break;
+
+ case R_68K_32:
+ *loc += v;
+ break;
+
+ case R_68K_8:
+ if (v > 0xff) {
+ ret = obj_reloc_overflow;
+ }
+ *(char *)loc = v;
+ break;
+
+ case R_68K_16:
+ if (v > 0xffff) {
+ ret = obj_reloc_overflow;
+ }
+ *(short *)loc = v;
+ break;
+
+ case R_68K_PC8:
+ v -= dot;
+ if ((ElfW(Sword))v > 0x7f ||
+ (ElfW(Sword))v < -(ElfW(Sword))0x80) {
+ ret = obj_reloc_overflow;
+ }
+ *(char *)loc = v;
+ break;
+
+ case R_68K_PC16:
+ v -= dot;
+ if ((ElfW(Sword))v > 0x7fff ||
+ (ElfW(Sword))v < -(ElfW(Sword))0x8000) {
+ ret = obj_reloc_overflow;
+ }
+ *(short *)loc = v;
+ break;
+
+ case R_68K_PC32:
+ *(int *)loc = v - dot;
+ break;
+
+ case R_68K_GLOB_DAT:
+ case R_68K_JMP_SLOT:
+ *loc = v;
+ break;
+
+ case R_68K_RELATIVE:
+ *(int *)loc += f->baseaddr;
+ break;
+
+ case R_68K_GOT32:
+ goto bb_use_got;
+
+# ifdef R_68K_GOTOFF
+ case R_68K_GOTOFF:
+ *loc += v - got;
+ break;
+# endif
+
+#elif defined(__mips__)
+
+ case R_MIPS_NONE:
+ break;
+
+ case R_MIPS_32:
+ *loc += v;
+ break;
+
+ case R_MIPS_26:
+ if (v % 4)
+ ret = obj_reloc_dangerous;
+ if ((v & 0xf0000000) != ((dot + 4) & 0xf0000000))
+ ret = obj_reloc_overflow;
+ *loc =
+ (*loc & ~0x03ffffff) | ((*loc + (v >> 2)) &
+ 0x03ffffff);
+ break;
+
+ case R_MIPS_HI16:
+ {
+ struct mips_hi16 *n;
+
+ /* We cannot relocate this one now because we don't know the value
+ of the carry we need to add. Save the information, and let LO16
+ do the actual relocation. */
+ n = xmalloc(sizeof *n);
+ n->addr = loc;
+ n->value = v;
+ n->next = ifile->mips_hi16_list;
+ ifile->mips_hi16_list = n;
+ break;
+ }
+
+ case R_MIPS_LO16:
+ {
+ unsigned long insnlo = *loc;
+ ElfW(Addr) val, vallo;
+
+ /* Sign extend the addend we extract from the lo insn. */
+ vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000;
+
+ if (ifile->mips_hi16_list != NULL) {
+ struct mips_hi16 *l;
+
+ l = ifile->mips_hi16_list;
+ while (l != NULL) {
+ struct mips_hi16 *next;
+ unsigned long insn;
+
+ /* Do the HI16 relocation. Note that we actually don't
+ need to know anything about the LO16 itself, except where
+ to find the low 16 bits of the addend needed by the LO16. */
+ insn = *l->addr;
+ val =
+ ((insn & 0xffff) << 16) +
+ vallo;
+ val += v;
+
+ /* Account for the sign extension that will happen in the
+ low bits. */
+ val =
+ ((val >> 16) +
+ ((val & 0x8000) !=
+ 0)) & 0xffff;
+
+ insn = (insn & ~0xffff) | val;
+ *l->addr = insn;
+
+ next = l->next;
+ free(l);
+ l = next;
+ }
+
+ ifile->mips_hi16_list = NULL;
+ }
+
+ /* Ok, we're done with the HI16 relocs. Now deal with the LO16. */
+ val = v + vallo;
+ insnlo = (insnlo & ~0xffff) | (val & 0xffff);
+ *loc = insnlo;
+ break;
+ }
+
+#elif defined(__nios2__)
+
+ case R_NIOS2_NONE:
+ break;
+
+ case R_NIOS2_BFD_RELOC_32:
+ *loc += v;
+ break;
+
+ case R_NIOS2_BFD_RELOC_16:
+ if (v > 0xffff) {
+ ret = obj_reloc_overflow;
+ }
+ *(short *)loc = v;
+ break;
+
+ case R_NIOS2_BFD_RELOC_8:
+ if (v > 0xff) {
+ ret = obj_reloc_overflow;
+ }
+ *(char *)loc = v;
+ break;
+
+ case R_NIOS2_S16:
+ {
+ Elf32_Addr word;
+
+ if ((Elf32_Sword)v > 0x7fff ||
+ (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
+ ret = obj_reloc_overflow;
+ }
+
+ word = *loc;
+ *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
+ (word & 0x3f);
+ }
+ break;
+
+ case R_NIOS2_U16:
+ {
+ Elf32_Addr word;
+
+ if (v > 0xffff) {
+ ret = obj_reloc_overflow;
+ }
+
+ word = *loc;
+ *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
+ (word & 0x3f);
+ }
+ break;
+
+ case R_NIOS2_PCREL16:
+ {
+ Elf32_Addr word;
+
+ v -= dot + 4;
+ if ((Elf32_Sword)v > 0x7fff ||
+ (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
+ ret = obj_reloc_overflow;
+ }
+
+ word = *loc;
+ *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
+ }
+ break;
+
+ case R_NIOS2_GPREL:
+ {
+ Elf32_Addr word, gp;
+ /* get _gp */
+ gp = obj_symbol_final_value(f, obj_find_symbol(f, SPFX "_gp"));
+ v-=gp;
+ if ((Elf32_Sword)v > 0x7fff ||
+ (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
+ ret = obj_reloc_overflow;
+ }
+
+ word = *loc;
+ *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
+ }
+ break;
+
+ case R_NIOS2_CALL26:
+ if (v & 3)
+ ret = obj_reloc_dangerous;
+ if ((v >> 28) != (dot >> 28))
+ ret = obj_reloc_overflow;
+ *loc = (*loc & 0x3f) | ((v >> 2) << 6);
+ break;
+
+ case R_NIOS2_IMM5:
+ {
+ Elf32_Addr word;
+
+ if (v > 0x1f) {
+ ret = obj_reloc_overflow;
+ }
+
+ word = *loc & ~0x7c0;
+ *loc = word | ((v & 0x1f) << 6);
+ }
+ break;
+
+ case R_NIOS2_IMM6:
+ {
+ Elf32_Addr word;
+
+ if (v > 0x3f) {
+ ret = obj_reloc_overflow;
+ }
+
+ word = *loc & ~0xfc0;
+ *loc = word | ((v & 0x3f) << 6);
+ }
+ break;
+
+ case R_NIOS2_IMM8:
+ {
+ Elf32_Addr word;
+
+ if (v > 0xff) {
+ ret = obj_reloc_overflow;
+ }
+
+ word = *loc & ~0x3fc0;
+ *loc = word | ((v & 0xff) << 6);
+ }
+ break;
+
+ case R_NIOS2_HI16:
+ {
+ Elf32_Addr word;
+
+ word = *loc;
+ *loc = ((((word >> 22) << 16) | ((v >>16) & 0xffff)) << 6) |
+ (word & 0x3f);
+ }
+ break;
+
+ case R_NIOS2_LO16:
+ {
+ Elf32_Addr word;
+
+ word = *loc;
+ *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
+ (word & 0x3f);
+ }
+ break;
+
+ case R_NIOS2_HIADJ16:
+ {
+ Elf32_Addr word1, word2;
+
+ word1 = *loc;
+ word2 = ((v >> 16) + ((v >> 15) & 1)) & 0xffff;
+ *loc = ((((word1 >> 22) << 16) | word2) << 6) |
+ (word1 & 0x3f);
+ }
+ break;
+
+#elif defined(__powerpc64__)
+ /* PPC64 needs a 2.6 kernel, 2.4 module relocation irrelevant */
+
+#elif defined(__powerpc__)
+
+ case R_PPC_ADDR16_HA:
+ *(unsigned short *)loc = (v + 0x8000) >> 16;
+ break;
+
+ case R_PPC_ADDR16_HI:
+ *(unsigned short *)loc = v >> 16;
+ break;
+
+ case R_PPC_ADDR16_LO:
+ *(unsigned short *)loc = v;
+ break;
+
+ case R_PPC_REL24:
+ goto bb_use_plt;
+
+ case R_PPC_REL32:
+ *loc = v - dot;
+ break;
+
+ case R_PPC_ADDR32:
+ *loc = v;
+ break;
+
+#elif defined(__s390__)
+
+ case R_390_32:
+ *(unsigned int *) loc += v;
+ break;
+ case R_390_16:
+ *(unsigned short *) loc += v;
+ break;
+ case R_390_8:
+ *(unsigned char *) loc += v;
+ break;
+
+ case R_390_PC32:
+ *(unsigned int *) loc += v - dot;
+ break;
+ case R_390_PC16DBL:
+ *(unsigned short *) loc += (v - dot) >> 1;
+ break;
+ case R_390_PC16:
+ *(unsigned short *) loc += v - dot;
+ break;
+
+ case R_390_PLT32:
+ case R_390_PLT16DBL:
+ /* find the plt entry and initialize it. */
+ pe = (struct arch_single_entry *) &isym->pltent;
+ if (pe->inited == 0) {
+ ip = (unsigned long *)(ifile->plt->contents + pe->offset);
+ ip[0] = 0x0d105810; /* basr 1,0; lg 1,10(1); br 1 */
+ ip[1] = 0x100607f1;
+ if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
+ ip[2] = v - 2;
+ else
+ ip[2] = v;
+ pe->inited = 1;
+ }
+
+ /* Insert relative distance to target. */
+ v = plt + pe->offset - dot;
+ if (ELF_R_TYPE(rel->r_info) == R_390_PLT32)
+ *(unsigned int *) loc = (unsigned int) v;
+ else if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
+ *(unsigned short *) loc = (unsigned short) ((v + 2) >> 1);
+ break;
+
+ case R_390_GLOB_DAT:
+ case R_390_JMP_SLOT:
+ *loc = v;
+ break;
+
+ case R_390_RELATIVE:
+ *loc += f->baseaddr;
+ break;
+
+ case R_390_GOTPC:
+ *(unsigned long *) loc += got - dot;
+ break;
+
+ case R_390_GOT12:
+ case R_390_GOT16:
+ case R_390_GOT32:
+ if (!isym->gotent.inited)
+ {
+ isym->gotent.inited = 1;
+ *(ElfW(Addr) *)(ifile->got->contents + isym->gotent.offset) = v;
+ }
+ if (ELF_R_TYPE(rel->r_info) == R_390_GOT12)
+ *(unsigned short *) loc |= (*(unsigned short *) loc + isym->gotent.offset) & 0xfff;
+ else if (ELF_R_TYPE(rel->r_info) == R_390_GOT16)
+ *(unsigned short *) loc += isym->gotent.offset;
+ else if (ELF_R_TYPE(rel->r_info) == R_390_GOT32)
+ *(unsigned int *) loc += isym->gotent.offset;
+ break;
+
+# ifndef R_390_GOTOFF32
+# define R_390_GOTOFF32 R_390_GOTOFF
+# endif
+ case R_390_GOTOFF32:
+ *loc += v - got;
+ break;
+
+#elif defined(__sh__)
+
+ case R_SH_NONE:
+ break;
+
+ case R_SH_DIR32:
+ *loc += v;
+ break;
+
+ case R_SH_REL32:
+ *loc += v - dot;
+ break;
+
+ case R_SH_PLT32:
+ *loc = v - dot;
+ break;
+
+ case R_SH_GLOB_DAT:
+ case R_SH_JMP_SLOT:
+ *loc = v;
+ break;
+
+ case R_SH_RELATIVE:
+ *loc = f->baseaddr + rel->r_addend;
+ break;
+
+ case R_SH_GOTPC:
+ *loc = got - dot + rel->r_addend;
+ break;
+
+ case R_SH_GOT32:
+ goto bb_use_got;
+
+ case R_SH_GOTOFF:
+ *loc = v - got;
+ break;
+
+# if defined(__SH5__)
+ case R_SH_IMM_MEDLOW16:
+ case R_SH_IMM_LOW16:
+ {
+ ElfW(Addr) word;
+
+ if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16)
+ v >>= 16;
+
+ /*
+ * movi and shori have the format:
+ *
+ * | op | imm | reg | reserved |
+ * 31..26 25..10 9.. 4 3 .. 0
+ *
+ * so we simply mask and or in imm.
+ */
+ word = *loc & ~0x3fffc00;
+ word |= (v & 0xffff) << 10;
+
+ *loc = word;
+
+ break;
+ }
+
+ case R_SH_IMM_MEDLOW16_PCREL:
+ case R_SH_IMM_LOW16_PCREL:
+ {
+ ElfW(Addr) word;
+
+ word = *loc & ~0x3fffc00;
+
+ v -= dot;
+
+ if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16_PCREL)
+ v >>= 16;
+
+ word |= (v & 0xffff) << 10;
+
+ *loc = word;
+
+ break;
+ }
+# endif /* __SH5__ */
+
+#elif defined(__v850e__)
+
+ case R_V850_NONE:
+ break;
+
+ case R_V850_32:
+ /* We write two shorts instead of a long because even
+ 32-bit insns only need half-word alignment, but
+ 32-bit data needs to be long-word aligned. */
+ v += ((unsigned short *)loc)[0];
+ v += ((unsigned short *)loc)[1] << 16;
+ ((unsigned short *)loc)[0] = v & 0xffff;
+ ((unsigned short *)loc)[1] = (v >> 16) & 0xffff;
+ break;
+
+ case R_V850_22_PCREL:
+ goto bb_use_plt;
+
+#elif defined(__x86_64__)
+
+ case R_X86_64_NONE:
+ break;
+
+ case R_X86_64_64:
+ *loc += v;
+ break;
+
+ case R_X86_64_32:
+ *(unsigned int *) loc += v;
+ if (v > 0xffffffff)
+ {
+ ret = obj_reloc_overflow; /* Kernel module compiled without -mcmodel=kernel. */
+ /* error("Possibly is module compiled without -mcmodel=kernel!"); */
+ }
+ break;
+
+ case R_X86_64_32S:
+ *(signed int *) loc += v;
+ break;
+
+ case R_X86_64_16:
+ *(unsigned short *) loc += v;
+ break;
+
+ case R_X86_64_8:
+ *(unsigned char *) loc += v;
+ break;
+
+ case R_X86_64_PC32:
+ *(unsigned int *) loc += v - dot;
+ break;
+
+ case R_X86_64_PC16:
+ *(unsigned short *) loc += v - dot;
+ break;
+
+ case R_X86_64_PC8:
+ *(unsigned char *) loc += v - dot;
+ break;
+
+ case R_X86_64_GLOB_DAT:
+ case R_X86_64_JUMP_SLOT:
+ *loc = v;
+ break;
+
+ case R_X86_64_RELATIVE:
+ *loc += f->baseaddr;
+ break;
+
+ case R_X86_64_GOT32:
+ case R_X86_64_GOTPCREL:
+ goto bb_use_got;
+# if 0
+ if (!isym->gotent.reloc_done)
+ {
+ isym->gotent.reloc_done = 1;
+ *(Elf64_Addr *)(ifile->got->contents + isym->gotent.offset) = v;
+ }
+ /* XXX are these really correct? */
+ if (ELF64_R_TYPE(rel->r_info) == R_X86_64_GOTPCREL)
+ *(unsigned int *) loc += v + isym->gotent.offset;
+ else
+ *loc += isym->gotent.offset;
+ break;
+# endif
+
+#else
+# warning "no idea how to handle relocations on your arch"
+#endif
+
+ default:
+ printf("Warning: unhandled reloc %d\n",(int)ELF_R_TYPE(rel->r_info));
+ ret = obj_reloc_unhandled;
+ break;
+
+#if defined(USE_PLT_ENTRIES)
+
+bb_use_plt:
+
+ /* find the plt entry and initialize it if necessary */
+
+#if defined(USE_PLT_LIST)
+ for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;)
+ pe = pe->next;
+#else
+ pe = &isym->pltent;
+#endif
+
+ if (! pe->inited) {
+ ip = (unsigned long *) (ifile->plt->contents + pe->offset);
+
+ /* generate some machine code */
+
+#if defined(__arm__)
+ ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */
+ ip[1] = v; /* sym@ */
+#endif
+#if defined(__powerpc__)
+ ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */
+ ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */
+ ip[2] = 0x7d6903a6; /* mtctr r11 */
+ ip[3] = 0x4e800420; /* bctr */
+#endif
+#if defined(__v850e__)
+ /* We have to trash a register, so we assume that any control
+ transfer more than 21-bits away must be a function call
+ (so we can use a call-clobbered register). */
+ ip[0] = 0x0621 + ((v & 0xffff) << 16); /* mov sym, r1 ... */
+ ip[1] = ((v >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */
+#endif
+ pe->inited = 1;
+ }
+
+ /* relative distance to target */
+ v -= dot;
+ /* if the target is too far away.... */
+#if defined(__arm__) || defined(__powerpc__)
+ if ((int)v < -0x02000000 || (int)v >= 0x02000000)
+#elif defined(__v850e__)
+ if ((ElfW(Sword))v > 0x1fffff || (ElfW(Sword))v < (ElfW(Sword))-0x200000)
+#endif
+ /* go via the plt */
+ v = plt + pe->offset - dot;
+
+#if defined(__v850e__)
+ if (v & 1)
+#else
+ if (v & 3)
+#endif
+ ret = obj_reloc_dangerous;
+
+ /* merge the offset into the instruction. */
+#if defined(__arm__)
+ /* Convert to words. */
+ v >>= 2;
+
+ *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff);
+#endif
+#if defined(__powerpc__)
+ *loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc);
+#endif
+#if defined(__v850e__)
+ /* We write two shorts instead of a long because even 32-bit insns
+ only need half-word alignment, but the 32-bit data write needs
+ to be long-word aligned. */
+ ((unsigned short *)loc)[0] =
+ (*(unsigned short *)loc & 0xffc0) /* opcode + reg */
+ | ((v >> 16) & 0x3f); /* offs high part */
+ ((unsigned short *)loc)[1] =
+ (v & 0xffff); /* offs low part */
+#endif
+ break;
+#endif /* USE_PLT_ENTRIES */
+
+#if defined(USE_GOT_ENTRIES)
+bb_use_got:
+
+ /* needs an entry in the .got: set it, once */
+ if (!isym->gotent.inited) {
+ isym->gotent.inited = 1;
+ *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v;
+ }
+ /* make the reloc with_respect_to_.got */
+#if defined(__sh__)
+ *loc += isym->gotent.offset + rel->r_addend;
+#elif defined(__i386__) || defined(__arm__) || defined(__mc68000__)
+ *loc += isym->gotent.offset;
+#endif
+ break;
+
+#endif /* USE_GOT_ENTRIES */
+ }
+
+ return ret;
+}
+
+
+#if defined(USE_LIST)
+
+static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list,
+ int offset, int size)
+{
+ struct arch_list_entry *pe;
+
+ for (pe = *list; pe != NULL; pe = pe->next) {
+ if (pe->addend == rel->r_addend) {
+ break;
+ }
+ }
+
+ if (pe == NULL) {
+ pe = xmalloc(sizeof(struct arch_list_entry));
+ pe->next = *list;
+ pe->addend = rel->r_addend;
+ pe->offset = offset;
+ pe->inited = 0;
+ *list = pe;
+ return size;
+ }
+ return 0;
+}
+
+#endif
+
+#if defined(USE_SINGLE)
+
+static int arch_single_init(/*ElfW(RelM) *rel,*/ struct arch_single_entry *single,
+ int offset, int size)
+{
+ if (single->allocated == 0) {
+ single->allocated = 1;
+ single->offset = offset;
+ single->inited = 0;
+ return size;
+ }
+ return 0;
+}
+
+#endif
+
+#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
+
+static struct obj_section *arch_xsect_init(struct obj_file *f, const char *name,
+ int offset, int size)
+{
+ struct obj_section *myrelsec = obj_find_section(f, name);
+
+ if (offset == 0) {
+ offset += size;
+ }
+
+ if (myrelsec) {
+ obj_extend_section(myrelsec, offset);
+ } else {
+ myrelsec = obj_create_alloced_section(f, name,
+ size, offset);
+ }
+
+ return myrelsec;
+}
+
+#endif
+
+static void arch_create_got(struct obj_file *f)
+{
+#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
+ struct arch_file *ifile = (struct arch_file *) f;
+ int i;
+#if defined(USE_GOT_ENTRIES)
+ int got_offset = 0, got_needed = 0, got_allocate;
+#endif
+#if defined(USE_PLT_ENTRIES)
+ int plt_offset = 0, plt_needed = 0, plt_allocate;
+#endif
+ struct obj_section *relsec, *symsec, *strsec;
+ ElfW(RelM) *rel, *relend;
+ ElfW(Sym) *symtab, *extsym;
+ const char *strtab, *name;
+ struct arch_symbol *intsym;
+
+ for (i = 0; i < f->header.e_shnum; ++i) {
+ relsec = f->sections[i];
+ if (relsec->header.sh_type != SHT_RELM)
+ continue;
+
+ symsec = f->sections[relsec->header.sh_link];
+ strsec = f->sections[symsec->header.sh_link];
+
+ rel = (ElfW(RelM) *) relsec->contents;
+ relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM)));
+ symtab = (ElfW(Sym) *) symsec->contents;
+ strtab = (const char *) strsec->contents;
+
+ for (; rel < relend; ++rel) {
+ extsym = &symtab[ELF_R_SYM(rel->r_info)];
+
+#if defined(USE_GOT_ENTRIES)
+ got_allocate = 0;
+#endif
+#if defined(USE_PLT_ENTRIES)
+ plt_allocate = 0;
+#endif
+
+ switch (ELF_R_TYPE(rel->r_info)) {
+#if defined(__arm__)
+ case R_ARM_PC24:
+ case R_ARM_PLT32:
+ plt_allocate = 1;
+ break;
+
+ case R_ARM_GOTOFF:
+ case R_ARM_GOTPC:
+ got_needed = 1;
+ continue;
+
+ case R_ARM_GOT32:
+ got_allocate = 1;
+ break;
+
+#elif defined(__i386__)
+ case R_386_GOTPC:
+ case R_386_GOTOFF:
+ got_needed = 1;
+ continue;
+
+ case R_386_GOT32:
+ got_allocate = 1;
+ break;
+
+#elif defined(__powerpc__)
+ case R_PPC_REL24:
+ plt_allocate = 1;
+ break;
+
+#elif defined(__mc68000__)
+ case R_68K_GOT32:
+ got_allocate = 1;
+ break;
+
+#ifdef R_68K_GOTOFF
+ case R_68K_GOTOFF:
+ got_needed = 1;
+ continue;
+#endif
+
+#elif defined(__sh__)
+ case R_SH_GOT32:
+ got_allocate = 1;
+ break;
+
+ case R_SH_GOTPC:
+ case R_SH_GOTOFF:
+ got_needed = 1;
+ continue;
+
+#elif defined(__v850e__)
+ case R_V850_22_PCREL:
+ plt_needed = 1;
+ break;
+
+#endif
+ default:
+ continue;
+ }
+
+ if (extsym->st_name != 0) {
+ name = strtab + extsym->st_name;
+ } else {
+ name = f->sections[extsym->st_shndx]->name;
+ }
+ intsym = (struct arch_symbol *) obj_find_symbol(f, name);
+#if defined(USE_GOT_ENTRIES)
+ if (got_allocate) {
+ got_offset += arch_single_init(
+ /*rel,*/ &intsym->gotent,
+ got_offset, GOT_ENTRY_SIZE);
+
+ got_needed = 1;
+ }
+#endif
+#if defined(USE_PLT_ENTRIES)
+ if (plt_allocate) {
+#if defined(USE_PLT_LIST)
+ plt_offset += arch_list_add(
+ rel, &intsym->pltent,
+ plt_offset, PLT_ENTRY_SIZE);
+#else
+ plt_offset += arch_single_init(
+ /*rel,*/ &intsym->pltent,
+ plt_offset, PLT_ENTRY_SIZE);
+#endif
+ plt_needed = 1;
+ }
+#endif
+ }
+ }
+
+#if defined(USE_GOT_ENTRIES)
+ if (got_needed) {
+ ifile->got = arch_xsect_init(f, ".got", got_offset,
+ GOT_ENTRY_SIZE);
+ }
+#endif
+
+#if defined(USE_PLT_ENTRIES)
+ if (plt_needed) {
+ ifile->plt = arch_xsect_init(f, ".plt", plt_offset,
+ PLT_ENTRY_SIZE);
+ }
+#endif
+
+#endif /* defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) */
+}
+
+/*======================================================================*/
+
+/* Standard ELF hash function. */
+static unsigned long obj_elf_hash_n(const char *name, unsigned long n)
+{
+ unsigned long h = 0;
+ unsigned long g;
+ unsigned char ch;
+
+ while (n > 0) {
+ ch = *name++;
+ h = (h << 4) + ch;
+ g = (h & 0xf0000000);
+ if (g != 0) {
+ h ^= g >> 24;
+ h &= ~g;
+ }
+ n--;
+ }
+ return h;
+}
+
+static unsigned long obj_elf_hash(const char *name)
+{
+ return obj_elf_hash_n(name, strlen(name));
+}
+
+#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
+/* String comparison for non-co-versioned kernel and module. */
+
+static int ncv_strcmp(const char *a, const char *b)
+{
+ size_t alen = strlen(a), blen = strlen(b);
+
+ if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R')
+ return strncmp(a, b, alen);
+ else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R')
+ return strncmp(a, b, blen);
+ else
+ return strcmp(a, b);
+}
+
+/* String hashing for non-co-versioned kernel and module. Here
+ we are simply forced to drop the crc from the hash. */
+
+static unsigned long ncv_symbol_hash(const char *str)
+{
+ size_t len = strlen(str);
+ if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R')
+ len -= 10;
+ return obj_elf_hash_n(str, len);
+}
+
+static void
+obj_set_symbol_compare(struct obj_file *f,
+ int (*cmp) (const char *, const char *),
+ unsigned long (*hash) (const char *))
+{
+ if (cmp)
+ f->symbol_cmp = cmp;
+ if (hash) {
+ struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next;
+ int i;
+
+ f->symbol_hash = hash;
+
+ memcpy(tmptab, f->symtab, sizeof(tmptab));
+ memset(f->symtab, 0, sizeof(f->symtab));
+
+ for (i = 0; i < HASH_BUCKETS; ++i)
+ for (sym = tmptab[i]; sym; sym = next) {
+ unsigned long h = hash(sym->name) % HASH_BUCKETS;
+ next = sym->next;
+ sym->next = f->symtab[h];
+ f->symtab[h] = sym;
+ }
+ }
+}
+
+#endif /* FEATURE_INSMOD_VERSION_CHECKING */
+
+static struct obj_symbol *
+obj_add_symbol(struct obj_file *f, const char *name,
+ unsigned long symidx, int info,
+ int secidx, ElfW(Addr) value,
+ unsigned long size)
+{
+ struct obj_symbol *sym;
+ unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
+ int n_type = ELF_ST_TYPE(info);
+ int n_binding = ELF_ST_BIND(info);
+
+ for (sym = f->symtab[hash]; sym; sym = sym->next) {
+ if (f->symbol_cmp(sym->name, name) == 0) {
+ int o_secidx = sym->secidx;
+ int o_info = sym->info;
+ int o_type = ELF_ST_TYPE(o_info);
+ int o_binding = ELF_ST_BIND(o_info);
+
+ /* A redefinition! Is it legal? */
+
+ if (secidx == SHN_UNDEF)
+ return sym;
+ else if (o_secidx == SHN_UNDEF)
+ goto found;
+ else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) {
+ /* Cope with local and global symbols of the same name
+ in the same object file, as might have been created
+ by ld -r. The only reason locals are now seen at this
+ level at all is so that we can do semi-sensible things
+ with parameters. */
+
+ struct obj_symbol *nsym, **p;
+
+ nsym = arch_new_symbol();
+ nsym->next = sym->next;
+ nsym->ksymidx = -1;
+
+ /* Excise the old (local) symbol from the hash chain. */
+ for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next)
+ continue;
+ *p = sym = nsym;
+ goto found;
+ } else if (n_binding == STB_LOCAL) {
+ /* Another symbol of the same name has already been defined.
+ Just add this to the local table. */
+ sym = arch_new_symbol();
+ sym->next = NULL;
+ sym->ksymidx = -1;
+ f->local_symtab[symidx] = sym;
+ goto found;
+ } else if (n_binding == STB_WEAK)
+ return sym;
+ else if (o_binding == STB_WEAK)
+ goto found;
+ /* Don't unify COMMON symbols with object types the programmer
+ doesn't expect. */
+ else if (secidx == SHN_COMMON
+ && (o_type == STT_NOTYPE || o_type == STT_OBJECT))
+ return sym;
+ else if (o_secidx == SHN_COMMON
+ && (n_type == STT_NOTYPE || n_type == STT_OBJECT))
+ goto found;
+ else {
+ /* Don't report an error if the symbol is coming from
+ the kernel or some external module. */
+ if (secidx <= SHN_HIRESERVE)
+ bb_error_msg("%s multiply defined", name);
+ return sym;
+ }
+ }
+ }
+
+ /* Completely new symbol. */
+ sym = arch_new_symbol();
+ sym->next = f->symtab[hash];
+ f->symtab[hash] = sym;
+ sym->ksymidx = -1;
+ if (ELF_ST_BIND(info) == STB_LOCAL && symidx != (unsigned long)(-1)) {
+ if (symidx >= f->local_symtab_size)
+ bb_error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld",
+ name, (long) symidx, (long) f->local_symtab_size);
+ else
+ f->local_symtab[symidx] = sym;
+ }
+
+found:
+ sym->name = name;
+ sym->value = value;
+ sym->size = size;
+ sym->secidx = secidx;
+ sym->info = info;
+
+ return sym;
+}
+
+static struct obj_symbol *
+obj_find_symbol(struct obj_file *f, const char *name)
+{
+ struct obj_symbol *sym;
+ unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
+
+ for (sym = f->symtab[hash]; sym; sym = sym->next)
+ if (f->symbol_cmp(sym->name, name) == 0)
+ return sym;
+
+ return NULL;
+}
+
+static ElfW(Addr) obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym)
+{
+ if (sym) {
+ if (sym->secidx >= SHN_LORESERVE)
+ return sym->value;
+
+ return sym->value + f->sections[sym->secidx]->header.sh_addr;
+ } else {
+ /* As a special case, a NULL sym has value zero. */
+ return 0;
+ }
+}
+
+static struct obj_section *obj_find_section(struct obj_file *f, const char *name)
+{
+ int i, n = f->header.e_shnum;
+
+ for (i = 0; i < n; ++i)
+ if (strcmp(f->sections[i]->name, name) == 0)
+ return f->sections[i];
+
+ return NULL;
+}
+
+static int obj_load_order_prio(struct obj_section *a)
+{
+ unsigned long af, ac;
+
+ af = a->header.sh_flags;
+
+ ac = 0;
+ if (a->name[0] != '.' || strlen(a->name) != 10 ||
+ strcmp(a->name + 5, ".init"))
+ ac |= 32;
+ if (af & SHF_ALLOC)
+ ac |= 16;
+ if (!(af & SHF_WRITE))
+ ac |= 8;
+ if (af & SHF_EXECINSTR)
+ ac |= 4;
+ if (a->header.sh_type != SHT_NOBITS)
+ ac |= 2;
+
+ return ac;
+}
+
+static void
+obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec)
+{
+ struct obj_section **p;
+ int prio = obj_load_order_prio(sec);
+ for (p = f->load_order_search_start; *p; p = &(*p)->load_next)
+ if (obj_load_order_prio(*p) < prio)
+ break;
+ sec->load_next = *p;
+ *p = sec;
+}
+
+static struct obj_section *obj_create_alloced_section(struct obj_file *f,
+ const char *name,
+ unsigned long align,
+ unsigned long size)
+{
+ int newidx = f->header.e_shnum++;
+ struct obj_section *sec;
+
+ f->sections = xrealloc_vector(f->sections, 2, newidx);
+ f->sections[newidx] = sec = arch_new_section();
+
+ sec->header.sh_type = SHT_PROGBITS;
+ sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
+ sec->header.sh_size = size;
+ sec->header.sh_addralign = align;
+ sec->name = name;
+ sec->idx = newidx;
+ if (size)
+ sec->contents = xmalloc(size);
+
+ obj_insert_section_load_order(f, sec);
+
+ return sec;
+}
+
+static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
+ const char *name,
+ unsigned long align,
+ unsigned long size)
+{
+ int newidx = f->header.e_shnum++;
+ struct obj_section *sec;
+
+ f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec));
+ f->sections[newidx] = sec = arch_new_section();
+
+ sec->header.sh_type = SHT_PROGBITS;
+ sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
+ sec->header.sh_size = size;
+ sec->header.sh_addralign = align;
+ sec->name = name;
+ sec->idx = newidx;
+ if (size)
+ sec->contents = xmalloc(size);
+
+ sec->load_next = f->load_order;
+ f->load_order = sec;
+ if (f->load_order_search_start == &f->load_order)
+ f->load_order_search_start = &sec->load_next;
+
+ return sec;
+}
+
+static void *obj_extend_section(struct obj_section *sec, unsigned long more)
+{
+ unsigned long oldsize = sec->header.sh_size;
+ if (more) {
+ sec->header.sh_size += more;
+ sec->contents = xrealloc(sec->contents, sec->header.sh_size);
+ }
+ return sec->contents + oldsize;
+}
+
+
+/* Conditionally add the symbols from the given symbol set to the
+ new module. */
+
+static int
+add_symbols_from( struct obj_file *f,
+ int idx, struct new_module_symbol *syms, size_t nsyms)
+{
+ struct new_module_symbol *s;
+ size_t i;
+ int used = 0;
+#ifdef SYMBOL_PREFIX
+ char *name_buf = 0;
+ size_t name_alloced_size = 0;
+#endif
+#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
+ int gpl;
+
+ gpl = obj_gpl_license(f, NULL) == 0;
+#endif
+ for (i = 0, s = syms; i < nsyms; ++i, ++s) {
+ /* Only add symbols that are already marked external.
+ If we override locals we may cause problems for
+ argument initialization. We will also create a false
+ dependency on the module. */
+ struct obj_symbol *sym;
+ char *name;
+
+ /* GPL licensed modules can use symbols exported with
+ * EXPORT_SYMBOL_GPL, so ignore any GPLONLY_ prefix on the
+ * exported names. Non-GPL modules never see any GPLONLY_
+ * symbols so they cannot fudge it by adding the prefix on
+ * their references.
+ */
+ if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) {
+#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
+ if (gpl)
+ s->name += 8;
+ else
+#endif
+ continue;
+ }
+ name = (char *)s->name;
+
+#ifdef SYMBOL_PREFIX
+ /* Prepend SYMBOL_PREFIX to the symbol's name (the
+ kernel exports `C names', but module object files
+ reference `linker names'). */
+ size_t extra = sizeof SYMBOL_PREFIX;
+ size_t name_size = strlen(name) + extra;
+ if (name_size > name_alloced_size) {
+ name_alloced_size = name_size * 2;
+ name_buf = alloca(name_alloced_size);
+ }
+ strcpy(name_buf, SYMBOL_PREFIX);
+ strcpy(name_buf + extra - 1, name);
+ name = name_buf;
+#endif /* SYMBOL_PREFIX */
+
+ sym = obj_find_symbol(f, name);
+ if (sym && !(ELF_ST_BIND(sym->info) == STB_LOCAL)) {
+#ifdef SYMBOL_PREFIX
+ /* Put NAME_BUF into more permanent storage. */
+ name = xmalloc(name_size);
+ strcpy(name, name_buf);
+#endif
+ sym = obj_add_symbol(f, name, -1,
+ ELF_ST_INFO(STB_GLOBAL,
+ STT_NOTYPE),
+ idx, s->value, 0);
+ /* Did our symbol just get installed? If so, mark the
+ module as "used". */
+ if (sym->secidx == idx)
+ used = 1;
+ }
+ }
+
+ return used;
+}
+
+static void add_kernel_symbols(struct obj_file *f)
+{
+ struct external_module *m;
+ int i, nused = 0;
+
+ /* Add module symbols first. */
+
+ for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) {
+ if (m->nsyms
+ && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, m->nsyms)
+ ) {
+ m->used = 1;
+ ++nused;
+ }
+ }
+
+ n_ext_modules_used = nused;
+
+ /* And finally the symbols from the kernel proper. */
+
+ if (nksyms)
+ add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms);
+}
+
+static char *get_modinfo_value(struct obj_file *f, const char *key)
+{
+ struct obj_section *sec;
+ char *p, *v, *n, *ep;
+ size_t klen = strlen(key);
+
+ sec = obj_find_section(f, ".modinfo");
+ if (sec == NULL)
+ return NULL;
+ p = sec->contents;
+ ep = p + sec->header.sh_size;
+ while (p < ep) {
+ v = strchr(p, '=');
+ n = strchr(p, '\0');
+ if (v) {
+ if (p + klen == v && strncmp(p, key, klen) == 0)
+ return v + 1;
+ } else {
+ if (p + klen == n && strcmp(p, key) == 0)
+ return n;
+ }
+ p = n + 1;
+ }
+
+ return NULL;
+}
+
+
+/*======================================================================*/
+/* Functions relating to module loading after 2.1.18. */
+
+/* From Linux-2.6 sources */
+/* You can use " around spaces, but can't escape ". */
+/* Hyphens and underscores equivalent in parameter names. */
+static char *next_arg(char *args, char **param, char **val)
+{
+ unsigned int i, equals = 0;
+ int in_quote = 0, quoted = 0;
+ char *next;
+
+ if (*args == '"') {
+ args++;
+ in_quote = 1;
+ quoted = 1;
+ }
+
+ for (i = 0; args[i]; i++) {
+ if (args[i] == ' ' && !in_quote)
+ break;
+ if (equals == 0) {
+ if (args[i] == '=')
+ equals = i;
+ }
+ if (args[i] == '"')
+ in_quote = !in_quote;
+ }
+
+ *param = args;
+ if (!equals)
+ *val = NULL;
+ else {
+ args[equals] = '\0';
+ *val = args + equals + 1;
+
+ /* Don't include quotes in value. */
+ if (**val == '"') {
+ (*val)++;
+ if (args[i-1] == '"')
+ args[i-1] = '\0';
+ }
+ if (quoted && args[i-1] == '"')
+ args[i-1] = '\0';
+ }
+
+ if (args[i]) {
+ args[i] = '\0';
+ next = args + i + 1;
+ } else
+ next = args + i;
+
+ /* Chew up trailing spaces. */
+ return skip_whitespace(next);
+}
+
+static void
+new_process_module_arguments(struct obj_file *f, const char *options)
+{
+ char *xoptions, *pos;
+ char *param, *val;
+
+ xoptions = pos = xstrdup(skip_whitespace(options));
+ while (*pos) {
+ unsigned long charssize = 0;
+ char *tmp, *contents, *loc, *pinfo, *p;
+ struct obj_symbol *sym;
+ int min, max, n, len;
+
+ pos = next_arg(pos, ¶m, &val);
+
+ tmp = xasprintf("parm_%s", param);
+ pinfo = get_modinfo_value(f, tmp);
+ free(tmp);
+ if (pinfo == NULL)
+ bb_error_msg_and_die("invalid parameter %s", param);
+
+#ifdef SYMBOL_PREFIX
+ tmp = xasprintf(SYMBOL_PREFIX "%s", param);
+ sym = obj_find_symbol(f, tmp);
+ free(tmp);
+#else
+ sym = obj_find_symbol(f, param);
+#endif
+
+ /* Also check that the parameter was not resolved from the kernel. */
+ if (sym == NULL || sym->secidx > SHN_HIRESERVE)
+ bb_error_msg_and_die("symbol for parameter %s not found", param);
+
+ /* Number of parameters */
+ if (isdigit(*pinfo)) {
+ min = strtoul(pinfo, &pinfo, 10);
+ if (*pinfo == '-')
+ max = strtoul(pinfo + 1, &pinfo, 10);
+ else
+ max = min;
+ } else
+ min = max = 1;
+
+ contents = f->sections[sym->secidx]->contents;
+ loc = contents + sym->value;
+
+ if (*pinfo == 'c') {
+ if (!isdigit(*(pinfo + 1))) {
+ bb_error_msg_and_die("parameter type 'c' for %s must be followed by"
+ " the maximum size", param);
+ }
+ charssize = strtoul(pinfo + 1, (char **) NULL, 10);
+ }
+
+ if (val == NULL) {
+ if (*pinfo != 'b')
+ bb_error_msg_and_die("argument expected for parameter %s", param);
+ val = (char *) "1";
+ }
+
+ /* Parse parameter values */
+ n = 0;
+ p = val;
+ while (*p != 0) {
+ if (++n > max)
+ bb_error_msg_and_die("too many values for %s (max %d)", param, max);
+
+ switch (*pinfo) {
+ case 's':
+ len = strcspn(p, ",");
+ p[len] = 0;
+ obj_string_patch(f, sym->secidx,
+ loc - contents, p);
+ loc += tgt_sizeof_char_p;
+ p += len;
+ break;
+ case 'c':
+ len = strcspn(p, ",");
+ p[len] = 0;
+ if (len >= charssize)
+ bb_error_msg_and_die("string too long for %s (max %ld)", param,
+ charssize - 1);
+ strcpy((char *) loc, p);
+ loc += charssize;
+ p += len;
+ break;
+ case 'b':
+ *loc++ = strtoul(p, &p, 0);
+ break;
+ case 'h':
+ *(short *) loc = strtoul(p, &p, 0);
+ loc += tgt_sizeof_short;
+ break;
+ case 'i':
+ *(int *) loc = strtoul(p, &p, 0);
+ loc += tgt_sizeof_int;
+ break;
+ case 'l':
+ *(long *) loc = strtoul(p, &p, 0);
+ loc += tgt_sizeof_long;
+ break;
+ default:
+ bb_error_msg_and_die("unknown parameter type '%c' for %s",
+ *pinfo, param);
+ }
+
+ p = skip_whitespace(p);
+ if (*p != ',')
+ break;
+ p = skip_whitespace(p + 1);
+ }
+
+ if (n < min)
+ bb_error_msg_and_die("parameter %s requires at least %d arguments", param, min);
+ if (*p != '\0')
+ bb_error_msg_and_die("invalid argument syntax for %s", param);
+ }
+
+ free(xoptions);
+}
+
+#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
+static int new_is_module_checksummed(struct obj_file *f)
+{
+ const char *p = get_modinfo_value(f, "using_checksums");
+ if (p)
+ return xatoi(p);
+ return 0;
+}
+
+/* Get the module's kernel version in the canonical integer form. */
+
+static int
+new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
+{
+ char *p, *q;
+ int a, b, c;
+
+ p = get_modinfo_value(f, "kernel_version");
+ if (p == NULL)
+ return -1;
+ safe_strncpy(str, p, STRVERSIONLEN);
+
+ a = strtoul(p, &p, 10);
+ if (*p != '.')
+ return -1;
+ b = strtoul(p + 1, &p, 10);
+ if (*p != '.')
+ return -1;
+ c = strtoul(p + 1, &q, 10);
+ if (p + 1 == q)
+ return -1;
+
+ return a << 16 | b << 8 | c;
+}
+
+#endif /* FEATURE_INSMOD_VERSION_CHECKING */
+
+
+/* Fetch the loaded modules, and all currently exported symbols. */
+
+static void new_get_kernel_symbols(void)
+{
+ char *module_names, *mn;
+ struct external_module *modules, *m;
+ struct new_module_symbol *syms, *s;
+ size_t ret, bufsize, nmod, nsyms, i, j;
+
+ /* Collect the loaded modules. */
+
+ bufsize = 256;
+ module_names = xmalloc(bufsize);
+
+ retry_modules_load:
+ if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) {
+ if (errno == ENOSPC && bufsize < ret) {
+ bufsize = ret;
+ module_names = xrealloc(module_names, bufsize);
+ goto retry_modules_load;
+ }
+ bb_perror_msg_and_die("QM_MODULES");
+ }
+
+ n_ext_modules = nmod = ret;
+
+ /* Collect the modules' symbols. */
+
+ if (nmod) {
+ ext_modules = modules = xmalloc(nmod * sizeof(*modules));
+ memset(modules, 0, nmod * sizeof(*modules));
+ for (i = 0, mn = module_names, m = modules;
+ i < nmod; ++i, ++m, mn += strlen(mn) + 1) {
+ struct new_module_info info;
+
+ if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) {
+ if (errno == ENOENT) {
+ /* The module was removed out from underneath us. */
+ continue;
+ }
+ bb_perror_msg_and_die("query_module: QM_INFO: %s", mn);
+ }
+
+ bufsize = 1024;
+ syms = xmalloc(bufsize);
+ retry_mod_sym_load:
+ if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) {
+ switch (errno) {
+ case ENOSPC:
+ bufsize = ret;
+ syms = xrealloc(syms, bufsize);
+ goto retry_mod_sym_load;
+ case ENOENT:
+ /* The module was removed out from underneath us. */
+ continue;
+ default:
+ bb_perror_msg_and_die("query_module: QM_SYMBOLS: %s", mn);
+ }
+ }
+ nsyms = ret;
+
+ m->name = mn;
+ m->addr = info.addr;
+ m->nsyms = nsyms;
+ m->syms = syms;
+
+ for (j = 0, s = syms; j < nsyms; ++j, ++s) {
+ s->name += (unsigned long) syms;
+ }
+ }
+ }
+
+ /* Collect the kernel's symbols. */
+
+ syms = xmalloc(bufsize = 16 * 1024);
+ retry_kern_sym_load:
+ if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) {
+ if (errno == ENOSPC && bufsize < ret) {
+ bufsize = ret;
+ syms = xrealloc(syms, bufsize);
+ goto retry_kern_sym_load;
+ }
+ bb_perror_msg_and_die("kernel: QM_SYMBOLS");
+ }
+ nksyms = nsyms = ret;
+ ksyms = syms;
+
+ for (j = 0, s = syms; j < nsyms; ++j, ++s) {
+ s->name += (unsigned long) syms;
+ }
+}
+
+
+/* Return the kernel symbol checksum version, or zero if not used. */
+
+static int new_is_kernel_checksummed(void)
+{
+ struct new_module_symbol *s;
+ size_t i;
+
+ /* Using_Versions is not the first symbol, but it should be in there. */
+
+ for (i = 0, s = ksyms; i < nksyms; ++i, ++s)
+ if (strcmp((char *) s->name, "Using_Versions") == 0)
+ return s->value;
+
+ return 0;
+}
+
+
+static void new_create_this_module(struct obj_file *f, const char *m_name)
+{
+ struct obj_section *sec;
+
+ sec = obj_create_alloced_section_first(f, ".this", tgt_sizeof_long,
+ sizeof(struct new_module));
+ memset(sec->contents, 0, sizeof(struct new_module));
+
+ obj_add_symbol(f, SPFX "__this_module", -1,
+ ELF_ST_INFO(STB_LOCAL, STT_OBJECT), sec->idx, 0,
+ sizeof(struct new_module));
+
+ obj_string_patch(f, sec->idx, offsetof(struct new_module, name),
+ m_name);
+}
+
+#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
+/* add an entry to the __ksymtab section, creating it if necessary */
+static void new_add_ksymtab(struct obj_file *f, struct obj_symbol *sym)
+{
+ struct obj_section *sec;
+ ElfW(Addr) ofs;
+
+ /* ensure __ksymtab is allocated, EXPORT_NOSYMBOLS creates a non-alloc section.
+ * If __ksymtab is defined but not marked alloc, x out the first character
+ * (no obj_delete routine) and create a new __ksymtab with the correct
+ * characteristics.
+ */
+ sec = obj_find_section(f, "__ksymtab");
+ if (sec && !(sec->header.sh_flags & SHF_ALLOC)) {
+ *((char *)(sec->name)) = 'x'; /* override const */
+ sec = NULL;
+ }
+ if (!sec)
+ sec = obj_create_alloced_section(f, "__ksymtab",
+ tgt_sizeof_void_p, 0);
+ if (!sec)
+ return;
+ sec->header.sh_flags |= SHF_ALLOC;
+ /* Empty section might be byte-aligned */
+ sec->header.sh_addralign = tgt_sizeof_void_p;
+ ofs = sec->header.sh_size;
+ obj_symbol_patch(f, sec->idx, ofs, sym);
+ obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, sym->name);
+ obj_extend_section(sec, 2 * tgt_sizeof_char_p);
+}
+#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
+
+static int new_create_module_ksymtab(struct obj_file *f)
+{
+ struct obj_section *sec;
+ int i;
+
+ /* We must always add the module references. */
+
+ if (n_ext_modules_used) {
+ struct new_module_ref *dep;
+ struct obj_symbol *tm;
+
+ sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p,
+ (sizeof(struct new_module_ref)
+ * n_ext_modules_used));
+ if (!sec)
+ return 0;
+
+ tm = obj_find_symbol(f, SPFX "__this_module");
+ dep = (struct new_module_ref *) sec->contents;
+ for (i = 0; i < n_ext_modules; ++i)
+ if (ext_modules[i].used) {
+ dep->dep = ext_modules[i].addr;
+ obj_symbol_patch(f, sec->idx,
+ (char *) &dep->ref - sec->contents, tm);
+ dep->next_ref = 0;
+ ++dep;
+ }
+ }
+
+ if (!flag_noexport && !obj_find_section(f, "__ksymtab")) {
+ size_t nsyms;
+ int *loaded;
+
+ sec = obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, 0);
+
+ /* We don't want to export symbols residing in sections that
+ aren't loaded. There are a number of these created so that
+ we make sure certain module options don't appear twice. */
+
+ loaded = alloca(sizeof(int) * (i = f->header.e_shnum));
+ while (--i >= 0)
+ loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0;
+
+ for (nsyms = i = 0; i < HASH_BUCKETS; ++i) {
+ struct obj_symbol *sym;
+ for (sym = f->symtab[i]; sym; sym = sym->next)
+ if (ELF_ST_BIND(sym->info) != STB_LOCAL
+ && sym->secidx <= SHN_HIRESERVE
+ && (sym->secidx >= SHN_LORESERVE
+ || loaded[sym->secidx])) {
+ ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p;
+
+ obj_symbol_patch(f, sec->idx, ofs, sym);
+ obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p,
+ sym->name);
+
+ nsyms++;
+ }
+ }
+
+ obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p);
+ }
+
+ return 1;
+}
+
+
+static int
+new_init_module(const char *m_name, struct obj_file *f, unsigned long m_size)
+{
+ struct new_module *module;
+ struct obj_section *sec;
+ void *image;
+ int ret;
+ tgt_long m_addr;
+
+ sec = obj_find_section(f, ".this");
+ if (!sec || !sec->contents) {
+ bb_perror_msg_and_die("corrupt module %s?", m_name);
+ }
+ module = (struct new_module *) sec->contents;
+ m_addr = sec->header.sh_addr;
+
+ module->size_of_struct = sizeof(*module);
+ module->size = m_size;
+ module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0;
+
+ sec = obj_find_section(f, "__ksymtab");
+ if (sec && sec->header.sh_size) {
+ module->syms = sec->header.sh_addr;
+ module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p);
+ }
+
+ if (n_ext_modules_used) {
+ sec = obj_find_section(f, ".kmodtab");
+ module->deps = sec->header.sh_addr;
+ module->ndeps = n_ext_modules_used;
+ }
+
+ module->init =
+ obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module"));
+ module->cleanup =
+ obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module"));
+
+ sec = obj_find_section(f, "__ex_table");
+ if (sec) {
+ module->ex_table_start = sec->header.sh_addr;
+ module->ex_table_end = sec->header.sh_addr + sec->header.sh_size;
+ }
+
+ sec = obj_find_section(f, ".text.init");
+ if (sec) {
+ module->runsize = sec->header.sh_addr - m_addr;
+ }
+ sec = obj_find_section(f, ".data.init");
+ if (sec) {
+ if (!module->runsize ||
+ module->runsize > sec->header.sh_addr - m_addr)
+ module->runsize = sec->header.sh_addr - m_addr;
+ }
+ sec = obj_find_section(f, ARCHDATA_SEC_NAME);
+ if (sec && sec->header.sh_size) {
+ module->archdata_start = (void*)sec->header.sh_addr;
+ module->archdata_end = module->archdata_start + sec->header.sh_size;
+ }
+ sec = obj_find_section(f, KALLSYMS_SEC_NAME);
+ if (sec && sec->header.sh_size) {
+ module->kallsyms_start = (void*)sec->header.sh_addr;
+ module->kallsyms_end = module->kallsyms_start + sec->header.sh_size;
+ }
+
+ /* Whew! All of the initialization is complete. Collect the final
+ module image and give it to the kernel. */
+
+ image = xmalloc(m_size);
+ obj_create_image(f, image);
+
+ ret = init_module(m_name, (struct new_module *) image);
+ if (ret)
+ bb_perror_msg("init_module: %s", m_name);
+
+ free(image);
+
+ return ret == 0;
+}
+
+
+/*======================================================================*/
+
+static void
+obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
+ const char *string)
+{
+ struct obj_string_patch *p;
+ struct obj_section *strsec;
+ size_t len = strlen(string) + 1;
+ char *loc;
+
+ p = xmalloc(sizeof(*p));
+ p->next = f->string_patches;
+ p->reloc_secidx = secidx;
+ p->reloc_offset = offset;
+ f->string_patches = p;
+
+ strsec = obj_find_section(f, ".kstrtab");
+ if (strsec == NULL) {
+ strsec = obj_create_alloced_section(f, ".kstrtab", 1, len);
+ p->string_offset = 0;
+ loc = strsec->contents;
+ } else {
+ p->string_offset = strsec->header.sh_size;
+ loc = obj_extend_section(strsec, len);
+ }
+ memcpy(loc, string, len);
+}
+
+static void
+obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
+ struct obj_symbol *sym)
+{
+ struct obj_symbol_patch *p;
+
+ p = xmalloc(sizeof(*p));
+ p->next = f->symbol_patches;
+ p->reloc_secidx = secidx;
+ p->reloc_offset = offset;
+ p->sym = sym;
+ f->symbol_patches = p;
+}
+
+static void obj_check_undefineds(struct obj_file *f)
+{
+ unsigned i;
+
+ for (i = 0; i < HASH_BUCKETS; ++i) {
+ struct obj_symbol *sym;
+ for (sym = f->symtab[i]; sym; sym = sym->next)
+ if (sym->secidx == SHN_UNDEF) {
+ if (ELF_ST_BIND(sym->info) == STB_WEAK) {
+ sym->secidx = SHN_ABS;
+ sym->value = 0;
+ } else {
+ if (!flag_quiet)
+ bb_error_msg_and_die("unresolved symbol %s", sym->name);
+ }
+ }
+ }
+}
+
+static void obj_allocate_commons(struct obj_file *f)
+{
+ struct common_entry {
+ struct common_entry *next;
+ struct obj_symbol *sym;
+ } *common_head = NULL;
+
+ unsigned long i;
+
+ for (i = 0; i < HASH_BUCKETS; ++i) {
+ struct obj_symbol *sym;
+ for (sym = f->symtab[i]; sym; sym = sym->next)
+ if (sym->secidx == SHN_COMMON) {
+ /* Collect all COMMON symbols and sort them by size so as to
+ minimize space wasted by alignment requirements. */
+ {
+ struct common_entry **p, *n;
+ for (p = &common_head; *p; p = &(*p)->next)
+ if (sym->size <= (*p)->sym->size)
+ break;
+
+ n = alloca(sizeof(*n));
+ n->next = *p;
+ n->sym = sym;
+ *p = n;
+ }
+ }
+ }
+
+ for (i = 1; i < f->local_symtab_size; ++i) {
+ struct obj_symbol *sym = f->local_symtab[i];
+ if (sym && sym->secidx == SHN_COMMON) {
+ struct common_entry **p, *n;
+ for (p = &common_head; *p; p = &(*p)->next)
+ if (sym == (*p)->sym)
+ break;
+ else if (sym->size < (*p)->sym->size) {
+ n = alloca(sizeof(*n));
+ n->next = *p;
+ n->sym = sym;
+ *p = n;
+ break;
+ }
+ }
+ }
+
+ if (common_head) {
+ /* Find the bss section. */
+ for (i = 0; i < f->header.e_shnum; ++i)
+ if (f->sections[i]->header.sh_type == SHT_NOBITS)
+ break;
+
+ /* If for some reason there hadn't been one, create one. */
+ if (i == f->header.e_shnum) {
+ struct obj_section *sec;
+
+ f->sections = xrealloc_vector(f->sections, 2, i);
+ f->sections[i] = sec = arch_new_section();
+ f->header.e_shnum = i + 1;
+
+ sec->header.sh_type = SHT_PROGBITS;
+ sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
+ sec->name = ".bss";
+ sec->idx = i;
+ }
+
+ /* Allocate the COMMONS. */
+ {
+ ElfW(Addr) bss_size = f->sections[i]->header.sh_size;
+ ElfW(Addr) max_align = f->sections[i]->header.sh_addralign;
+ struct common_entry *c;
+
+ for (c = common_head; c; c = c->next) {
+ ElfW(Addr) align = c->sym->value;
+
+ if (align > max_align)
+ max_align = align;
+ if (bss_size & (align - 1))
+ bss_size = (bss_size | (align - 1)) + 1;
+
+ c->sym->secidx = i;
+ c->sym->value = bss_size;
+
+ bss_size += c->sym->size;
+ }
+
+ f->sections[i]->header.sh_size = bss_size;
+ f->sections[i]->header.sh_addralign = max_align;
+ }
+ }
+
+ /* For the sake of patch relocation and parameter initialization,
+ allocate zeroed data for NOBITS sections now. Note that after
+ this we cannot assume NOBITS are really empty. */
+ for (i = 0; i < f->header.e_shnum; ++i) {
+ struct obj_section *s = f->sections[i];
+ if (s->header.sh_type == SHT_NOBITS) {
+ if (s->header.sh_size != 0)
+ s->contents = memset(xmalloc(s->header.sh_size),
+ 0, s->header.sh_size);
+ else
+ s->contents = NULL;
+
+ s->header.sh_type = SHT_PROGBITS;
+ }
+ }
+}
+
+static unsigned long obj_load_size(struct obj_file *f)
+{
+ unsigned long dot = 0;
+ struct obj_section *sec;
+
+ /* Finalize the positions of the sections relative to one another. */
+
+ for (sec = f->load_order; sec; sec = sec->load_next) {
+ ElfW(Addr) align;
+
+ align = sec->header.sh_addralign;
+ if (align && (dot & (align - 1)))
+ dot = (dot | (align - 1)) + 1;
+
+ sec->header.sh_addr = dot;
+ dot += sec->header.sh_size;
+ }
+
+ return dot;
+}
+
+static int obj_relocate(struct obj_file *f, ElfW(Addr) base)
+{
+ int i, n = f->header.e_shnum;
+ int ret = 1;
+
+ /* Finalize the addresses of the sections. */
+
+ f->baseaddr = base;
+ for (i = 0; i < n; ++i)
+ f->sections[i]->header.sh_addr += base;
+
+ /* And iterate over all of the relocations. */
+
+ for (i = 0; i < n; ++i) {
+ struct obj_section *relsec, *symsec, *targsec, *strsec;
+ ElfW(RelM) * rel, *relend;
+ ElfW(Sym) * symtab;
+ const char *strtab;
+
+ relsec = f->sections[i];
+ if (relsec->header.sh_type != SHT_RELM)
+ continue;
+
+ symsec = f->sections[relsec->header.sh_link];
+ targsec = f->sections[relsec->header.sh_info];
+ strsec = f->sections[symsec->header.sh_link];
+
+ rel = (ElfW(RelM) *) relsec->contents;
+ relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM)));
+ symtab = (ElfW(Sym) *) symsec->contents;
+ strtab = (const char *) strsec->contents;
+
+ for (; rel < relend; ++rel) {
+ ElfW(Addr) value = 0;
+ struct obj_symbol *intsym = NULL;
+ unsigned long symndx;
+ ElfW(Sym) * extsym = 0;
+ const char *errmsg;
+
+ /* Attempt to find a value to use for this relocation. */
+
+ symndx = ELF_R_SYM(rel->r_info);
+ if (symndx) {
+ /* Note we've already checked for undefined symbols. */
+
+ extsym = &symtab[symndx];
+ if (ELF_ST_BIND(extsym->st_info) == STB_LOCAL) {
+ /* Local symbols we look up in the local table to be sure
+ we get the one that is really intended. */
+ intsym = f->local_symtab[symndx];
+ } else {
+ /* Others we look up in the hash table. */
+ const char *name;
+ if (extsym->st_name)
+ name = strtab + extsym->st_name;
+ else
+ name = f->sections[extsym->st_shndx]->name;
+ intsym = obj_find_symbol(f, name);
+ }
+
+ value = obj_symbol_final_value(f, intsym);
+ intsym->referenced = 1;
+ }
+#if SHT_RELM == SHT_RELA
+#if defined(__alpha__) && defined(AXP_BROKEN_GAS)
+ /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */
+ if (!extsym || !extsym->st_name ||
+ ELF_ST_BIND(extsym->st_info) != STB_LOCAL)
+#endif
+ value += rel->r_addend;
+#endif
+
+ /* Do it! */
+ switch (arch_apply_relocation
+ (f, targsec, /*symsec,*/ intsym, rel, value)
+ ) {
+ case obj_reloc_ok:
+ break;
+
+ case obj_reloc_overflow:
+ errmsg = "Relocation overflow";
+ goto bad_reloc;
+ case obj_reloc_dangerous:
+ errmsg = "Dangerous relocation";
+ goto bad_reloc;
+ case obj_reloc_unhandled:
+ errmsg = "Unhandled relocation";
+bad_reloc:
+ if (extsym) {
+ bb_error_msg("%s of type %ld for %s", errmsg,
+ (long) ELF_R_TYPE(rel->r_info),
+ strtab + extsym->st_name);
+ } else {
+ bb_error_msg("%s of type %ld", errmsg,
+ (long) ELF_R_TYPE(rel->r_info));
+ }
+ ret = 0;
+ break;
+ }
+ }
+ }
+
+ /* Finally, take care of the patches. */
+
+ if (f->string_patches) {
+ struct obj_string_patch *p;
+ struct obj_section *strsec;
+ ElfW(Addr) strsec_base;
+ strsec = obj_find_section(f, ".kstrtab");
+ strsec_base = strsec->header.sh_addr;
+
+ for (p = f->string_patches; p; p = p->next) {
+ struct obj_section *targsec = f->sections[p->reloc_secidx];
+ *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
+ = strsec_base + p->string_offset;
+ }
+ }
+
+ if (f->symbol_patches) {
+ struct obj_symbol_patch *p;
+
+ for (p = f->symbol_patches; p; p = p->next) {
+ struct obj_section *targsec = f->sections[p->reloc_secidx];
+ *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
+ = obj_symbol_final_value(f, p->sym);
+ }
+ }
+
+ return ret;
+}
+
+static int obj_create_image(struct obj_file *f, char *image)
+{
+ struct obj_section *sec;
+ ElfW(Addr) base = f->baseaddr;
+
+ for (sec = f->load_order; sec; sec = sec->load_next) {
+ char *secimg;
+
+ if (sec->contents == 0 || sec->header.sh_size == 0)
+ continue;
+
+ secimg = image + (sec->header.sh_addr - base);
+
+ /* Note that we allocated data for NOBITS sections earlier. */
+ memcpy(secimg, sec->contents, sec->header.sh_size);
+ }
+
+ return 1;
+}
+
+/*======================================================================*/
+
+static struct obj_file *obj_load(FILE *fp, int loadprogbits UNUSED_PARAM)
+{
+ struct obj_file *f;
+ ElfW(Shdr) * section_headers;
+ size_t shnum, i;
+ char *shstrtab;
+
+ /* Read the file header. */
+
+ f = arch_new_file();
+ f->symbol_cmp = strcmp;
+ f->symbol_hash = obj_elf_hash;
+ f->load_order_search_start = &f->load_order;
+
+ fseek(fp, 0, SEEK_SET);
+ if (fread(&f->header, sizeof(f->header), 1, fp) != 1) {
+ bb_perror_msg_and_die("error reading ELF header");
+ }
+
+ if (f->header.e_ident[EI_MAG0] != ELFMAG0
+ || f->header.e_ident[EI_MAG1] != ELFMAG1
+ || f->header.e_ident[EI_MAG2] != ELFMAG2
+ || f->header.e_ident[EI_MAG3] != ELFMAG3) {
+ bb_error_msg_and_die("not an ELF file");
+ }
+ if (f->header.e_ident[EI_CLASS] != ELFCLASSM
+ || f->header.e_ident[EI_DATA] != (BB_BIG_ENDIAN
+ ? ELFDATA2MSB : ELFDATA2LSB)
+ || f->header.e_ident[EI_VERSION] != EV_CURRENT
+ || !MATCH_MACHINE(f->header.e_machine)) {
+ bb_error_msg_and_die("ELF file not for this architecture");
+ }
+ if (f->header.e_type != ET_REL) {
+ bb_error_msg_and_die("ELF file not a relocatable object");
+ }
+
+ /* Read the section headers. */
+
+ if (f->header.e_shentsize != sizeof(ElfW(Shdr))) {
+ bb_error_msg_and_die("section header size mismatch: %lu != %lu",
+ (unsigned long) f->header.e_shentsize,
+ (unsigned long) sizeof(ElfW(Shdr)));
+ }
+
+ shnum = f->header.e_shnum;
+ f->sections = xmalloc(sizeof(struct obj_section *) * shnum);
+ memset(f->sections, 0, sizeof(struct obj_section *) * shnum);
+
+ section_headers = alloca(sizeof(ElfW(Shdr)) * shnum);
+ fseek(fp, f->header.e_shoff, SEEK_SET);
+ if (fread(section_headers, sizeof(ElfW(Shdr)), shnum, fp) != shnum) {
+ bb_perror_msg_and_die("error reading ELF section headers");
+ }
+
+ /* Read the section data. */
+
+ for (i = 0; i < shnum; ++i) {
+ struct obj_section *sec;
+
+ f->sections[i] = sec = arch_new_section();
+
+ sec->header = section_headers[i];
+ sec->idx = i;
+
+ if (sec->header.sh_size) {
+ switch (sec->header.sh_type) {
+ case SHT_NULL:
+ case SHT_NOTE:
+ case SHT_NOBITS:
+ /* ignore */
+ break;
+
+ case SHT_PROGBITS:
+#if LOADBITS
+ if (!loadprogbits) {
+ sec->contents = NULL;
+ break;
+ }
+#endif
+ case SHT_SYMTAB:
+ case SHT_STRTAB:
+ case SHT_RELM:
+ if (sec->header.sh_size > 0) {
+ sec->contents = xmalloc(sec->header.sh_size);
+ fseek(fp, sec->header.sh_offset, SEEK_SET);
+ if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) {
+ bb_perror_msg_and_die("error reading ELF section data");
+ }
+ } else {
+ sec->contents = NULL;
+ }
+ break;
+
+#if SHT_RELM == SHT_REL
+ case SHT_RELA:
+ bb_error_msg_and_die("RELA relocations not supported on this architecture");
+#else
+ case SHT_REL:
+ bb_error_msg_and_die("REL relocations not supported on this architecture");
+#endif
+ default:
+ if (sec->header.sh_type >= SHT_LOPROC) {
+ /* Assume processor specific section types are debug
+ info and can safely be ignored. If this is ever not
+ the case (Hello MIPS?), don't put ifdefs here but
+ create an arch_load_proc_section(). */
+ break;
+ }
+
+ bb_error_msg_and_die("can't handle sections of type %ld",
+ (long) sec->header.sh_type);
+ }
+ }
+ }
+
+ /* Do what sort of interpretation as needed by each section. */
+
+ shstrtab = f->sections[f->header.e_shstrndx]->contents;
+
+ for (i = 0; i < shnum; ++i) {
+ struct obj_section *sec = f->sections[i];
+ sec->name = shstrtab + sec->header.sh_name;
+ }
+
+ for (i = 0; i < shnum; ++i) {
+ struct obj_section *sec = f->sections[i];
+
+ /* .modinfo should be contents only but gcc has no attribute for that.
+ * The kernel may have marked .modinfo as ALLOC, ignore this bit.
+ */
+ if (strcmp(sec->name, ".modinfo") == 0)
+ sec->header.sh_flags &= ~SHF_ALLOC;
+
+ if (sec->header.sh_flags & SHF_ALLOC)
+ obj_insert_section_load_order(f, sec);
+
+ switch (sec->header.sh_type) {
+ case SHT_SYMTAB:
+ {
+ unsigned long nsym, j;
+ char *strtab;
+ ElfW(Sym) * sym;
+
+ if (sec->header.sh_entsize != sizeof(ElfW(Sym))) {
+ bb_error_msg_and_die("symbol size mismatch: %lu != %lu",
+ (unsigned long) sec->header.sh_entsize,
+ (unsigned long) sizeof(ElfW(Sym)));
+ }
+
+ nsym = sec->header.sh_size / sizeof(ElfW(Sym));
+ strtab = f->sections[sec->header.sh_link]->contents;
+ sym = (ElfW(Sym) *) sec->contents;
+
+ /* Allocate space for a table of local symbols. */
+ j = f->local_symtab_size = sec->header.sh_info;
+ f->local_symtab = xzalloc(j * sizeof(struct obj_symbol *));
+
+ /* Insert all symbols into the hash table. */
+ for (j = 1, ++sym; j < nsym; ++j, ++sym) {
+ ElfW(Addr) val = sym->st_value;
+ const char *name;
+ if (sym->st_name)
+ name = strtab + sym->st_name;
+ else if (sym->st_shndx < shnum)
+ name = f->sections[sym->st_shndx]->name;
+ else
+ continue;
+#if defined(__SH5__)
+ /*
+ * For sh64 it is possible that the target of a branch
+ * requires a mode switch (32 to 16 and back again).
+ *
+ * This is implied by the lsb being set in the target
+ * address for SHmedia mode and clear for SHcompact.
+ */
+ val |= sym->st_other & 4;
+#endif
+ obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx,
+ val, sym->st_size);
+ }
+ }
+ break;
+
+ case SHT_RELM:
+ if (sec->header.sh_entsize != sizeof(ElfW(RelM))) {
+ bb_error_msg_and_die("relocation entry size mismatch: %lu != %lu",
+ (unsigned long) sec->header.sh_entsize,
+ (unsigned long) sizeof(ElfW(RelM)));
+ }
+ break;
+ /* XXX Relocation code from modutils-2.3.19 is not here.
+ * Why? That's about 20 lines of code from obj/obj_load.c,
+ * which gets done in a second pass through the sections.
+ * This BusyBox insmod does similar work in obj_relocate(). */
+ }
+ }
+
+ return f;
+}
+
+#if ENABLE_FEATURE_INSMOD_LOADINKMEM
+/*
+ * load the unloaded sections directly into the memory allocated by
+ * kernel for the module
+ */
+
+static int obj_load_progbits(FILE *fp, struct obj_file *f, char *imagebase)
+{
+ ElfW(Addr) base = f->baseaddr;
+ struct obj_section* sec;
+
+ for (sec = f->load_order; sec; sec = sec->load_next) {
+
+ /* section already loaded? */
+ if (sec->contents != NULL)
+ continue;
+
+ if (sec->header.sh_size == 0)
+ continue;
+
+ sec->contents = imagebase + (sec->header.sh_addr - base);
+ fseek(fp, sec->header.sh_offset, SEEK_SET);
+ if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) {
+ bb_perror_msg("error reading ELF section data");
+ return 0;
+ }
+
+ }
+ return 1;
+}
+#endif
+
+static void hide_special_symbols(struct obj_file *f)
+{
+ static const char *const specials[] = {
+ SPFX "cleanup_module",
+ SPFX "init_module",
+ SPFX "kernel_version",
+ NULL
+ };
+
+ struct obj_symbol *sym;
+ const char *const *p;
+
+ for (p = specials; *p; ++p) {
+ sym = obj_find_symbol(f, *p);
+ if (sym != NULL)
+ sym->info = ELF_ST_INFO(STB_LOCAL, ELF_ST_TYPE(sym->info));
+ }
+}
+
+
+#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
+static int obj_gpl_license(struct obj_file *f, const char **license)
+{
+ struct obj_section *sec;
+ /* This list must match *exactly* the list of allowable licenses in
+ * linux/include/linux/module.h. Checking for leading "GPL" will not
+ * work, somebody will use "GPL sucks, this is proprietary".
+ */
+ static const char *const gpl_licenses[] = {
+ "GPL",
+ "GPL v2",
+ "GPL and additional rights",
+ "Dual BSD/GPL",
+ "Dual MPL/GPL"
+ };
+
+ sec = obj_find_section(f, ".modinfo");
+ if (sec) {
+ const char *value, *ptr, *endptr;
+ ptr = sec->contents;
+ endptr = ptr + sec->header.sh_size;
+ while (ptr < endptr) {
+ value = strchr(ptr, '=');
+ if (value && strncmp(ptr, "license", value-ptr) == 0) {
+ unsigned i;
+ if (license)
+ *license = value+1;
+ for (i = 0; i < ARRAY_SIZE(gpl_licenses); ++i) {
+ if (strcmp(value+1, gpl_licenses[i]) == 0)
+ return 0;
+ }
+ return 2;
+ }
+ ptr = strchr(ptr, '\0');
+ if (ptr)
+ ptr++;
+ else
+ ptr = endptr;
+ }
+ }
+ return 1;
+}
+
+#define TAINT_FILENAME "/proc/sys/kernel/tainted"
+#define TAINT_PROPRIETORY_MODULE (1 << 0)
+#define TAINT_FORCED_MODULE (1 << 1)
+#define TAINT_UNSAFE_SMP (1 << 2)
+#define TAINT_URL "http://www.tux.org/lkml/#export-tainted"
+
+static void set_tainted(int fd, const char *m_name,
+ int kernel_has_tainted, int taint, const char *text1, const char *text2)
+{
+ static smallint printed_info;
+
+ char buf[80];
+ int oldval;
+
+ if (fd < 0 && !kernel_has_tainted)
+ return; /* New modutils on old kernel */
+ printf("Warning: loading %s will taint the kernel: %s%s\n",
+ m_name, text1, text2);
+ if (!printed_info) {
+ printf(" See %s for information about tainted modules\n", TAINT_URL);
+ printed_info = 1;
+ }
+ if (fd >= 0) {
+ read(fd, buf, sizeof(buf)-1);
+ buf[sizeof(buf)-1] = '\0';
+ oldval = strtoul(buf, NULL, 10);
+ sprintf(buf, "%d\n", oldval | taint);
+ write(fd, buf, strlen(buf));
+ }
+}
+
+/* Check if loading this module will taint the kernel. */
+static void check_tainted_module(struct obj_file *f, const char *m_name)
+{
+ static const char tainted_file[] ALIGN1 = TAINT_FILENAME;
+
+ int fd, kernel_has_tainted;
+ const char *ptr;
+
+ kernel_has_tainted = 1;
+ fd = open(tainted_file, O_RDWR);
+ if (fd < 0) {
+ if (errno == ENOENT)
+ kernel_has_tainted = 0;
+ else if (errno == EACCES)
+ kernel_has_tainted = 1;
+ else {
+ perror(tainted_file);
+ kernel_has_tainted = 0;
+ }
+ }
+
+ switch (obj_gpl_license(f, &ptr)) {
+ case 0:
+ break;
+ case 1:
+ set_tainted(fd, m_name, kernel_has_tainted, TAINT_PROPRIETORY_MODULE, "no license", "");
+ break;
+ case 2:
+ /* The module has a non-GPL license so we pretend that the
+ * kernel always has a taint flag to get a warning even on
+ * kernels without the proc flag.
+ */
+ set_tainted(fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "non-GPL license - ", ptr);
+ break;
+ default:
+ set_tainted(fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "Unexpected return from obj_gpl_license", "");
+ break;
+ }
+
+ if (flag_force_load)
+ set_tainted(fd, m_name, 1, TAINT_FORCED_MODULE, "forced load", "");
+
+ if (fd >= 0)
+ close(fd);
+}
+#else /* FEATURE_CHECK_TAINTED_MODULE */
+#define check_tainted_module(x, y) do { } while (0);
+#endif /* FEATURE_CHECK_TAINTED_MODULE */
+
+#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
+/* add module source, timestamp, kernel version and a symbol for the
+ * start of some sections. this info is used by ksymoops to do better
+ * debugging.
+ */
+#if !ENABLE_FEATURE_INSMOD_VERSION_CHECKING
+#define get_module_version(f, str) get_module_version(str)
+#endif
+static int
+get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
+{
+#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
+ return new_get_module_version(f, str);
+#else /* FEATURE_INSMOD_VERSION_CHECKING */
+ strncpy(str, "???", sizeof(str));
+ return -1;
+#endif /* FEATURE_INSMOD_VERSION_CHECKING */
+}
+
+/* add module source, timestamp, kernel version and a symbol for the
+ * start of some sections. this info is used by ksymoops to do better
+ * debugging.
+ */
+static void
+add_ksymoops_symbols(struct obj_file *f, const char *filename,
+ const char *m_name)
+{
+ static const char symprefix[] ALIGN1 = "__insmod_";
+ static const char section_names[][8] = {
+ ".text",
+ ".rodata",
+ ".data",
+ ".bss",
+ ".sbss"
+ };
+
+ struct obj_section *sec;
+ struct obj_symbol *sym;
+ char *name, *absolute_filename;
+ char str[STRVERSIONLEN];
+ unsigned i;
+ int l, lm_name, lfilename, use_ksymtab, version;
+ struct stat statbuf;
+
+ /* WARNING: was using realpath, but replaced by readlink to stop using
+ * lots of stack. But here it seems to be able to cause problems? */
+ absolute_filename = xmalloc_readlink(filename);
+ if (!absolute_filename)
+ absolute_filename = xstrdup(filename);
+
+ lm_name = strlen(m_name);
+ lfilename = strlen(absolute_filename);
+
+ /* add to ksymtab if it already exists or there is no ksymtab and other symbols
+ * are not to be exported. otherwise leave ksymtab alone for now, the
+ * "export all symbols" compatibility code will export these symbols later.
+ */
+ use_ksymtab = obj_find_section(f, "__ksymtab") || flag_noexport;
+
+ sec = obj_find_section(f, ".this");
+ if (sec) {
+ /* tag the module header with the object name, last modified
+ * timestamp and module version. worst case for module version
+ * is 0xffffff, decimal 16777215. putting all three fields in
+ * one symbol is less readable but saves kernel space.
+ */
+ l = sizeof(symprefix) + /* "__insmod_" */
+ lm_name + /* module name */
+ 2 + /* "_O" */
+ lfilename + /* object filename */
+ 2 + /* "_M" */
+ 2 * sizeof(statbuf.st_mtime) + /* mtime in hex */
+ 2 + /* "_V" */
+ 8 + /* version in dec */
+ 1; /* nul */
+ name = xmalloc(l);
+ if (stat(absolute_filename, &statbuf) != 0)
+ statbuf.st_mtime = 0;
+ version = get_module_version(f, str); /* -1 if not found */
+ snprintf(name, l, "%s%s_O%s_M%0*lX_V%d",
+ symprefix, m_name, absolute_filename,
+ (int)(2 * sizeof(statbuf.st_mtime)), statbuf.st_mtime,
+ version);
+ sym = obj_add_symbol(f, name, -1,
+ ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
+ sec->idx, sec->header.sh_addr, 0);
+ if (use_ksymtab)
+ new_add_ksymtab(f, sym);
+ }
+ free(absolute_filename);
+#ifdef _NOT_SUPPORTED_
+ /* record where the persistent data is going, same address as previous symbol */
+
+ if (f->persist) {
+ l = sizeof(symprefix) + /* "__insmod_" */
+ lm_name + /* module name */
+ 2 + /* "_P" */
+ strlen(f->persist) + /* data store */
+ 1; /* nul */
+ name = xmalloc(l);
+ snprintf(name, l, "%s%s_P%s",
+ symprefix, m_name, f->persist);
+ sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
+ sec->idx, sec->header.sh_addr, 0);
+ if (use_ksymtab)
+ new_add_ksymtab(f, sym);
+ }
+#endif /* _NOT_SUPPORTED_ */
+ /* tag the desired sections if size is non-zero */
+
+ for (i = 0; i < ARRAY_SIZE(section_names); ++i) {
+ sec = obj_find_section(f, section_names[i]);
+ if (sec && sec->header.sh_size) {
+ l = sizeof(symprefix) + /* "__insmod_" */
+ lm_name + /* module name */
+ 2 + /* "_S" */
+ strlen(sec->name) + /* section name */
+ 2 + /* "_L" */
+ 8 + /* length in dec */
+ 1; /* nul */
+ name = xmalloc(l);
+ snprintf(name, l, "%s%s_S%s_L%ld",
+ symprefix, m_name, sec->name,
+ (long)sec->header.sh_size);
+ sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
+ sec->idx, sec->header.sh_addr, 0);
+ if (use_ksymtab)
+ new_add_ksymtab(f, sym);
+ }
+ }
+}
+#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
+
+#if ENABLE_FEATURE_INSMOD_LOAD_MAP
+static void print_load_map(struct obj_file *f)
+{
+ struct obj_section *sec;
+#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
+ struct obj_symbol **all, **p;
+ int i, nsyms, *loaded;
+ struct obj_symbol *sym;
+#endif
+ /* Report on the section layout. */
+
+ printf("Sections: Size %-*s Align\n",
+ (int) (2 * sizeof(void *)), "Address");
+
+ for (sec = f->load_order; sec; sec = sec->load_next) {
+ int a;
+ unsigned long tmp;
+
+ for (a = -1, tmp = sec->header.sh_addralign; tmp; ++a)
+ tmp >>= 1;
+ if (a == -1)
+ a = 0;
+
+ printf("%-15s %08lx %0*lx 2**%d\n",
+ sec->name,
+ (long)sec->header.sh_size,
+ (int) (2 * sizeof(void *)),
+ (long)sec->header.sh_addr,
+ a);
+ }
+#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
+ /* Quick reference which section indices are loaded. */
+
+ i = f->header.e_shnum;
+ loaded = alloca(sizeof(int) * i);
+ while (--i >= 0)
+ loaded[i] = ((f->sections[i]->header.sh_flags & SHF_ALLOC) != 0);
+
+ /* Collect the symbols we'll be listing. */
+
+ for (nsyms = i = 0; i < HASH_BUCKETS; ++i)
+ for (sym = f->symtab[i]; sym; sym = sym->next)
+ if (sym->secidx <= SHN_HIRESERVE
+ && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
+ ++nsyms;
+
+ all = alloca(nsyms * sizeof(struct obj_symbol *));
+
+ for (i = 0, p = all; i < HASH_BUCKETS; ++i)
+ for (sym = f->symtab[i]; sym; sym = sym->next)
+ if (sym->secidx <= SHN_HIRESERVE
+ && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
+ *p++ = sym;
+
+ /* And list them. */
+ printf("\nSymbols:\n");
+ for (p = all; p < all + nsyms; ++p) {
+ char type = '?';
+ unsigned long value;
+
+ sym = *p;
+ if (sym->secidx == SHN_ABS) {
+ type = 'A';
+ value = sym->value;
+ } else if (sym->secidx == SHN_UNDEF) {
+ type = 'U';
+ value = 0;
+ } else {
+ sec = f->sections[sym->secidx];
+
+ if (sec->header.sh_type == SHT_NOBITS)
+ type = 'B';
+ else if (sec->header.sh_flags & SHF_ALLOC) {
+ if (sec->header.sh_flags & SHF_EXECINSTR)
+ type = 'T';
+ else if (sec->header.sh_flags & SHF_WRITE)
+ type = 'D';
+ else
+ type = 'R';
+ }
+ value = sym->value + sec->header.sh_addr;
+ }
+
+ if (ELF_ST_BIND(sym->info) == STB_LOCAL)
+ type = tolower(type);
+
+ printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value,
+ type, sym->name);
+ }
+#endif
+}
+#else /* !FEATURE_INSMOD_LOAD_MAP */
+static void print_load_map(struct obj_file *f UNUSED_PARAM)
+{
+}
+#endif
+
+int FAST_FUNC bb_init_module_24(const char *m_filename, const char *options UNUSED_PARAM)
+{
+ int k_crcs;
+ unsigned long m_size;
+ ElfW(Addr) m_addr;
+ struct obj_file *f;
+ struct utsname uts;
+ int exit_status = EXIT_FAILURE;
+ int m_has_modinfo;
+ char *m_name;
+#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
+ char m_strversion[STRVERSIONLEN];
+ int m_version, m_crcs;
+#endif
+ FILE *fp;
+
+ uname(&uts);
+ fp = fopen_for_read(m_filename);
+ if (fp == NULL)
+ return EXIT_FAILURE;
+
+ m_name = xstrdup(bb_basename(m_filename));
+ *strrchr(m_name, '.') = 0;
+
+ f = obj_load(fp, LOADBITS);
+
+ if (get_modinfo_value(f, "kernel_version") == NULL)
+ m_has_modinfo = 0;
+ else
+ m_has_modinfo = 1;
+
+#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
+ /* Version correspondence? */
+ if (!flag_quiet) {
+ if (m_has_modinfo) {
+ m_version = new_get_module_version(f, m_strversion);
+ if (m_version == -1) {
+ bb_error_msg_and_die("cannot find the kernel version the module was "
+ "compiled for");
+ }
+ }
+
+ if (strncmp(uts.release, m_strversion, STRVERSIONLEN) != 0) {
+ bb_error_msg("%skernel-module version mismatch\n"
+ "\t%s was compiled for kernel version %s\n"
+ "\twhile this kernel is version %s",
+ flag_force_load ? "warning: " : "",
+ m_name, m_strversion, uts.release);
+ if (!flag_force_load)
+ goto out;
+ }
+ }
+ k_crcs = 0;
+#endif /* FEATURE_INSMOD_VERSION_CHECKING */
+
+ if (query_module(NULL, 0, NULL, 0, NULL))
+ bb_error_msg_and_die("not configured to support old kernels");
+ new_get_kernel_symbols();
+ k_crcs = new_is_kernel_checksummed();
+
+#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
+ m_crcs = 0;
+ if (m_has_modinfo)
+ m_crcs = new_is_module_checksummed(f);
+
+ if (m_crcs != k_crcs)
+ obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash);
+#endif /* FEATURE_INSMOD_VERSION_CHECKING */
+
+ /* Let the module know about the kernel symbols. */
+ add_kernel_symbols(f);
+
+ /* Allocate common symbols, symbol tables, and string tables. */
+
+ new_create_this_module(f, m_name);
+ obj_check_undefineds(f);
+ obj_allocate_commons(f);
+ check_tainted_module(f, m_name);
+
+ /* done with the module name, on to the optional var=value arguments */
+ new_process_module_arguments(f, options);
+
+ arch_create_got(f);
+ hide_special_symbols(f);
+
+#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
+ add_ksymoops_symbols(f, m_filename, m_name);
+#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
+
+ new_create_module_ksymtab(f);
+
+ /* Find current size of the module */
+ m_size = obj_load_size(f);
+
+ m_addr = create_module(m_name, m_size);
+ if (m_addr == (ElfW(Addr))(-1)) switch (errno) {
+ case EEXIST:
+ bb_error_msg_and_die("a module named %s already exists", m_name);
+ case ENOMEM:
+ bb_error_msg_and_die("can't allocate kernel memory for module; needed %lu bytes",
+ m_size);
+ default:
+ bb_perror_msg_and_die("create_module: %s", m_name);
+ }
+
+#if !LOADBITS
+ /*
+ * the PROGBITS section was not loaded by the obj_load
+ * now we can load them directly into the kernel memory
+ */
+ if (!obj_load_progbits(fp, f, (char*)m_addr)) {
+ delete_module(m_name, 0);
+ goto out;
+ }
+#endif
+
+ if (!obj_relocate(f, m_addr)) {
+ delete_module(m_name, 0);
+ goto out;
+ }
+
+ if (!new_init_module(m_name, f, m_size)) {
+ delete_module(m_name, 0);
+ goto out;
+ }
+
+ if (flag_print_load_map)
+ print_load_map(f);
+
+ exit_status = EXIT_SUCCESS;
+
+ out:
+ if (fp)
+ fclose(fp);
+ free(m_name);
+
+ return exit_status;
+}
--- /dev/null
+/*
+ * Common modutils related functions for busybox
+ *
+ * Copyright (C) 2008 by Timo Teras <timo.teras@iki.fi>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "modutils.h"
+
+#ifdef __UCLIBC__
+extern int init_module(void *module, unsigned long len, const char *options);
+extern int delete_module(const char *module, unsigned int flags);
+#else
+# include <sys/syscall.h>
+# define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts)
+# define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags)
+#endif
+
+USE_FEATURE_2_4_MODULES(char *insmod_outputname);
+
+/*
+ a libbb candidate from ice age!
+*/
+llist_t FAST_FUNC *llist_find(llist_t *first, const char *str)
+{
+ while (first != NULL) {
+ if (strcmp(first->data, str) == 0)
+ return first;
+ first = first->link;
+ }
+ return NULL;
+}
+
+void FAST_FUNC replace(char *s, char what, char with)
+{
+ while (*s) {
+ if (what == *s)
+ *s = with;
+ ++s;
+ }
+}
+
+char * FAST_FUNC replace_underscores(char *s)
+{
+ replace(s, '-', '_');
+ return s;
+}
+
+int FAST_FUNC string_to_llist(char *string, llist_t **llist, const char *delim)
+{
+ char *tok;
+ int len = 0;
+
+ while ((tok = strsep(&string, delim)) != NULL) {
+ if (tok[0] == '\0')
+ continue;
+ llist_add_to_end(llist, xstrdup(tok));
+ len += strlen(tok);
+ }
+ return len;
+}
+
+char * FAST_FUNC filename2modname(const char *filename, char *modname)
+{
+ int i;
+ char *from;
+
+ if (filename == NULL)
+ return NULL;
+ if (modname == NULL)
+ modname = xmalloc(MODULE_NAME_LEN);
+ from = bb_get_last_path_component_nostrip(filename);
+ for (i = 0; i < MODULE_NAME_LEN && from[i] != '\0' && from[i] != '.'; i++)
+ modname[i] = (from[i] == '-') ? '_' : from[i];
+ modname[i] = 0;
+
+ return modname;
+}
+
+const char * FAST_FUNC moderror(int err)
+{
+ switch (err) {
+ case -1:
+ return "no such module";
+ case ENOEXEC:
+ return "invalid module format";
+ case ENOENT:
+ return "unknown symbol in module, or unknown parameter";
+ case ESRCH:
+ return "module has wrong symbol version";
+ case ENOSYS:
+ return "kernel does not support requested operation";
+ default:
+ return strerror(err);
+ }
+}
+
+char * FAST_FUNC parse_cmdline_module_options(char **argv)
+{
+ char *options;
+ int optlen;
+
+ options = xzalloc(1);
+ optlen = 0;
+ while (*++argv) {
+ options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
+ /* Spaces handled by "" pairs, but no way of escaping quotes */
+ optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
+ }
+ return options;
+}
+
+int FAST_FUNC bb_init_module(const char *filename, const char *options)
+{
+ size_t len = MAXINT(ssize_t);
+ char *image;
+ int rc = ENOENT;
+
+#if ENABLE_FEATURE_2_4_MODULES
+ if (get_linux_version_code() < KERNEL_VERSION(2,6,0))
+ return bb_init_module_24(filename, options);
+#endif
+
+ /* Use the 2.6 way */
+ image = (char *) xmalloc_open_zipped_read_close(filename, &len);
+ if (image) {
+ if (init_module(image, len, options) != 0)
+ rc = errno;
+ else
+ rc = 0;
+ free(image);
+ }
+
+ return rc;
+}
+
+int FAST_FUNC bb_delete_module(const char *module, unsigned int flags)
+{
+ return delete_module(module, flags);
+}
--- /dev/null
+/*
+ * Common modutils related functions for busybox
+ *
+ * Copyright (C) 2008 by Timo Teras <timo.teras@iki.fi>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#ifndef __MODUTILS_H__
+#define __MODUTILS_H__
+
+#include "libbb.h"
+#include <stdio.h>
+
+#if __GNUC_PREREQ(4,1)
+# pragma GCC visibility push(hidden)
+#endif
+
+/* As defined in linux/include/linux/module.h */
+#define MODULE_NAME_LEN 64
+
+const char *moderror(int err) FAST_FUNC;
+llist_t *llist_find(llist_t *first, const char *str) FAST_FUNC;
+void replace(char *s, char what, char with) FAST_FUNC;
+char *replace_underscores(char *s) FAST_FUNC;
+int string_to_llist(char *string, llist_t **llist, const char *delim) FAST_FUNC ;
+char *filename2modname(const char *filename, char *modname) FAST_FUNC;
+char *parse_cmdline_module_options(char **argv) FAST_FUNC;
+
+#define INSMOD_OPTS "vq" USE_FEATURE_2_4_MODULES("sLo:fkx") \
+ USE_FEATURE_INSMOD_LOAD_MAP("m")
+#define INSMOD_ARGS USE_FEATURE_2_4_MODULES(, &insmod_outputname)
+
+enum {
+ INSMOD_OPT_VERBOSE = 0x0001,
+ INSMOD_OPT_SILENT = 0x0002,
+ INSMOD_OPT_SYSLOG = 0x0004 * ENABLE_FEATURE_2_4_MODULES,
+ INSMOD_OPT_LOCK = 0x0008 * ENABLE_FEATURE_2_4_MODULES,
+ INSMOD_OPT_OUTPUTNAME = 0x0010 * ENABLE_FEATURE_2_4_MODULES,
+ INSMOD_OPT_FORCE = 0x0020 * ENABLE_FEATURE_2_4_MODULES,
+ INSMOD_OPT_KERNELD = 0x0040 * ENABLE_FEATURE_2_4_MODULES,
+ INSMOD_OPT_NO_EXPORT = 0x0080 * ENABLE_FEATURE_2_4_MODULES,
+ INSMOD_OPT_PRINT_MAP = 0x0100 * ENABLE_FEATURE_INSMOD_LOAD_MAP,
+#if ENABLE_FEATURE_2_4_MODULES
+#if ENABLE_FEATURE_INSMOD_LOAD_MAP
+ INSMOD_OPT_UNUSED = 0x0200,
+#else /* ENABLE_FEATURE_INSMOD_LOAD_MAP */
+ INSMOD_OPT_UNUSED = 0x0100
+#endif
+#else /* ENABLE_FEATURE_2_4_MODULES */
+ INSMOD_OPT_UNUSED = 0x0004
+#endif
+};
+
+int FAST_FUNC bb_init_module(const char *module, const char *options);
+int FAST_FUNC bb_delete_module(const char *module, unsigned int flags);
+
+#if ENABLE_FEATURE_2_4_MODULES
+extern char *insmod_outputname;
+
+int FAST_FUNC bb_init_module_24(const char *module, const char *options);
+#endif
+
+#if __GNUC_PREREQ(4,1)
+# pragma GCC visibility pop
+#endif
+
+#endif
* Mini rmmod implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
-
-#ifdef __UCLIBC__
-extern int delete_module(const char *module, unsigned int flags);
-#else
-# include <sys/syscall.h>
-# define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags)
-#endif
-
-#if ENABLE_FEATURE_2_6_MODULES
-static void filename2modname(char *modname, const char *afterslash)
-{
- unsigned int i;
- int kr_chk = 1;
-
- if (ENABLE_FEATURE_2_4_MODULES
- && get_linux_version_code() <= KERNEL_VERSION(2,6,0))
- kr_chk = 0;
-
- /* Convert to underscores, stop at first . */
- for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
- if (kr_chk && (afterslash[i] == '-'))
- modname[i] = '_';
- else
- modname[i] = afterslash[i];
- }
- modname[i] = '\0';
-}
-#else
-void filename2modname(char *modname, const char *afterslash);
-#endif
-
-// There really should be a header file for this...
-
-int query_module(const char *name, int which, void *buf,
- size_t bufsize, size_t *ret);
+#include "modutils.h"
int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int rmmod_main(int argc, char **argv)
+int rmmod_main(int argc UNUSED_PARAM, char **argv)
{
- int n, ret = EXIT_SUCCESS;
+ int n;
unsigned int flags = O_NONBLOCK|O_EXCL;
-#define misc_buf bb_common_bufsiz1
-
/* Parse command line. */
- n = getopt32(argv, "wfa");
+ n = getopt32(argv, "wfas"); // -s ignored
+ argv += optind;
+
if (n & 1) // --wait
flags &= ~O_NONBLOCK;
if (n & 2) // --force
flags |= O_TRUNC;
if (n & 4) {
/* Unload _all_ unused modules via NULL delete_module() call */
- /* until the number of modules does not change */
- size_t nmod = 0; /* number of modules */
- size_t pnmod = -1; /* previous number of modules */
-
- while (nmod != pnmod) {
- if (delete_module(NULL, flags) != 0) {
- if (errno == EFAULT)
- return ret;
- bb_perror_msg_and_die("rmmod");
- }
- pnmod = nmod;
- // the 1 here is QM_MODULES.
- if (ENABLE_FEATURE_QUERY_MODULE_INTERFACE && query_module(NULL,
- 1, misc_buf, sizeof(misc_buf),
- &nmod))
- {
- bb_perror_msg_and_die("QM_MODULES");
- }
- }
+ if (bb_delete_module(NULL, flags) != 0 && errno != EFAULT)
+ bb_perror_msg_and_die("rmmod");
return EXIT_SUCCESS;
}
- if (optind == argc)
+ if (!*argv)
bb_show_usage();
- for (n = optind; n < argc; n++) {
- if (ENABLE_FEATURE_2_6_MODULES) {
- filename2modname(misc_buf, bb_basename(argv[n]));
- }
-
- if (delete_module(ENABLE_FEATURE_2_6_MODULES ? misc_buf : argv[n], flags)) {
- bb_simple_perror_msg(argv[n]);
- ret = EXIT_FAILURE;
- }
+ while (*argv) {
+ char modname[MODULE_NAME_LEN];
+ filename2modname(bb_basename(*argv++), modname);
+ if (bb_delete_module(modname, flags))
+ bb_error_msg_and_die("cannot unload '%s': %s",
+ modname, moderror(errno));
}
- return ret;
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / commitdiff