X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=modutils%2Fdepmod.c;h=a4474d5e4a96a7ab7b4687fd8100c8dcece95b48;hb=15437e3e2a0cc9e4ba25066fd562b2862d38799b;hp=b0b09c2358df4d36d8596488c4e2caf757b5de2f;hpb=beac1bd58e231f8b1664c767dc128a1d86b27fff;p=oweals%2Fbusybox.git diff --git a/modutils/depmod.c b/modutils/depmod.c index b0b09c235..a4474d5e4 100644 --- a/modutils/depmod.c +++ b/modutils/depmod.c @@ -1,7 +1,9 @@ /* vi: set sw=4 ts=4: */ /* * depmod - generate modules.dep - * Copyright (c) 2008 Bernhard Fischer + * Copyright (c) 2008 Bernhard Reutner-Fischer + * Copyrihgt (c) 2008 Timo Teras + * Copyright (c) 2008 Vladimir Dronnikov * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ @@ -10,12 +12,8 @@ #define _GNU_SOURCE #include #include /* uname() */ -#if ENABLE_DEBUG -#include -#define dbg_assert assert -#else -#define dbg_assert(stuff) do {} while (0) -#endif +#include "modutils.h" + /* * Theory of operation: * - iterate over all modules and record their full path @@ -23,246 +21,194 @@ * 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; - struct dep_lst_t *next; -} dep_lst_t; - -struct globals { - dep_lst_t *lst; /* modules without their corresponding extension */ - size_t moddir_base_len; /* length of the "-b basedir" */ + llist_t *aliases; + 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 int fill_lst(const char *modulename, struct stat ATTRIBUTE_UNUSED *sb, - void ATTRIBUTE_UNUSED *data, int ATTRIBUTE_UNUSED depth) +static int FAST_FUNC parse_module(const char *fname, struct stat *sb, + void *data, int UNUSED_PARAM depth) { + module_info **first = (module_info **) data; + char *image, *ptr; + module_info *info; + size_t len = sb->st_size; - /* We get a file here. If the file does not have ".ko" but an - * intermittent dentry has, it's just their fault. - */ - if (strrstr(modulename, ".ko") != NULL) { - dep_lst_t *new = xzalloc(sizeof(dep_lst_t)); - new->name = xstrdup(modulename + G.moddir_base_len); - new->next = G.lst; - G.lst = new; + if (strrstr(fname, ".ko") == NULL) + return TRUE; + + image = 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); + } } + free(image); + return TRUE; } -static int fileAction(const char *fname, struct stat *sb, - void ATTRIBUTE_UNUSED *data, int ATTRIBUTE_UNUSED depth) +static module_info *find_module(module_info *modules, const char *modname) { - 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; + 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"); - ptr = the_module; - this = G.lst; - do { - if (!strcmp(fname + G.moddir_base_len, this->name)) - break; - this = this->next; - } while (this); - dbg_assert (this); -//bb_info_msg("fname='%s'", fname + G.moddir_base_len); - do { - /* search for a 'd' */ - ptr = memchr(ptr, 'd', len - (ptr - (char*)the_module)); - if (ptr == NULL) /* no d left, done */ - goto none; - if (!strncmp(ptr, "depends=", sizeof("depends=")-1)) - break; - ++ptr; - } while (1); - deps = depends = xstrdup (ptr + sizeof("depends=")-1); -//bb_info_msg(" depends='%s'", depends); - while (deps) { - dep_lst_t *all = G.lst; + for (m = modules; m != NULL; m = m->next) + if (strcmp(m->modname, modname) == 0) + return m; + return NULL; +} - ptr = strsep(&deps, ","); - while (all) { - /* Compare the recorded filenames ignoring ".ko*" at the end. */ - char *tmp = bb_get_last_path_component_nostrip(all->name); - if (!strncmp(ptr, tmp, MAX(strlen(ptr),strrstr(tmp, ".ko") - tmp))) - break; /* found it */ - all = all->next; - } - if (all) { - dbg_assert(all->name); /* this cannot be empty */ -//bb_info_msg("[%s] -> '%s'", (char*)ptr, all->name); - llist_add_to_end(&this->dependencies, all->name); - } +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); } - free(depends); - none: - munmap(the_module, sb->st_size); - skip: - return TRUE; } int depmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv) +int depmod_main(int argc UNUSED_PARAM, char **argv) { - int ret; - 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) { - G.moddir_base_len = strlen(moddir_base); - if (ENABLE_FEATURE_CLEAN_UP) { - chp = moddir; - moddir = concat_path_file(moddir_base, moddir); - free (chp); - } else - moddir = concat_path_file(moddir_base, moddir); - } - - if (!(option_mask32 & ARG_n)) { /* --dry-run */ - chp = concat_path_file(moddir, CONFIG_DEFAULT_DEPMOD_FILE); - filedes = xfopen(chp, "w"); - if (ENABLE_FEATURE_CLEAN_UP) - free(chp); - } - ret = EXIT_SUCCESS; - /* We have to do a full walk to collect all needed data. */ - if (!recursive_action(moddir, - ACTION_RECURSE, /* flags */ - fill_lst, /* file action */ - NULL, /* dir action */ - NULL, /* user data */ - 0)) { /* depth */ - if (ENABLE_FEATURE_CLEAN_UP) - ret = EXIT_FAILURE; - else - return EXIT_FAILURE; - } -#if ENABLE_FEATURE_CLEAN_UP - else -#endif + /* Scan modules */ + moddir_base = xrealloc_getcwd_or_warn(NULL); do { - chp = option_mask32 & ARG_a ? moddir : *argv++; - - 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); + puts(""); + } - /* 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: - */ - { - dep_lst_t *mods = G.lst; -#if ENABLE_FEATURE_DEPMOD_PRUNE_FANCY - 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) { - /* erm, nicer would be 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; } - - mods = G.lst; #endif - /* Finally print them. */ - while (mods) { - fprintf(filedes, "%s:", mods->name); - while (mods->dependencies) - fprintf(filedes, " %s", (char*)llist_pop(&mods->dependencies)); - fprintf(filedes, "\n"); - mods = mods->next; - } +#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); + } } +#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; }