/*
* Mini insmod implementation for busybox
*
- * Copyright (C) 1999,2000 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
+ * Written by Erik Andersen <andersen@lineo.com>
+ * and Ron Alder <alder@lineo.com>
+ *
+ * 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.
+ *
+ * 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
*
* 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
*
*/
-#include "internal.h"
#include <stdlib.h>
#include <stdio.h>
+#include <stddef.h>
#include <errno.h>
#include <unistd.h>
#include <dirent.h>
+#include <ctype.h>
+#include <assert.h>
+#include <string.h>
+#include <getopt.h>
+#include <sys/utsname.h>
#include <sys/syscall.h>
-#include <linux/module.h>
+#include <linux/unistd.h>
+#include "busybox.h"
+
+//----------------------------------------------------------------------------
+//--------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
+static const int MODUTILS_MODULE_H = 1;
+
+#ident "$Id: insmod.c,v 1.48 2001/02/20 06:14:07 andersen Exp $"
+
+/* This file contains the structures used by the 2.0 and 2.1 kernels.
+ We do not use the kernel headers directly because we do not wish
+ to be dependant on a particular kernel version to compile insmod. */
+
+
+/*======================================================================*/
+/* The structures used by Linux 2.0. */
+
+/* The symbol format used by get_kernel_syms(2). */
+struct old_kernel_sym
+{
+ unsigned long value;
+ char name[60];
+};
+
+struct old_module_ref
+{
+ unsigned long module; /* kernel addresses */
+ unsigned long next;
+};
+
+struct old_module_symbol
+{
+ unsigned long addr;
+ unsigned long name;
+};
+
+struct old_symbol_table
+{
+ int size; /* total, including string table!!! */
+ int n_symbols;
+ int n_refs;
+ struct old_module_symbol symbol[0]; /* actual size defined by n_symbols */
+ struct old_module_ref ref[0]; /* actual size defined by n_refs */
+};
+
+struct old_mod_routines
+{
+ unsigned long init;
+ unsigned long cleanup;
+};
+
+struct old_module
+{
+ unsigned long next;
+ unsigned long ref; /* the list of modules that refer to me */
+ unsigned long symtab;
+ unsigned long name;
+ int size; /* size of module in pages */
+ unsigned long addr; /* address of module */
+ int state;
+ unsigned long cleanup; /* cleanup routine */
+};
+
+/* Sent to init_module(2) or'ed into the code size parameter. */
+static const int OLD_MOD_AUTOCLEAN = 0x40000000; /* big enough, but no sign problems... */
+
+int get_kernel_syms(struct old_kernel_sym *);
+int old_sys_init_module(const char *name, char *code, unsigned codesize,
+ struct old_mod_routines *, struct old_symbol_table *);
+
+/*======================================================================*/
+/* 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
+static const int tgt_sizeof_long = 8;
+static const int tgt_sizeof_char_p = 8;
+static const int 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;
+};
+
+struct new_module_info
+{
+ unsigned long addr;
+ unsigned long size;
+ unsigned long flags;
+ long usecount;
+};
+
+/* Bits of module.flags. */
+static const int NEW_MOD_RUNNING = 1;
+static const int NEW_MOD_DELETED = 2;
+static const int NEW_MOD_AUTOCLEAN = 4;
+static const int NEW_MOD_VISITED = 8;
+static const int NEW_MOD_USED_ONCE = 16;
+
+int new_sys_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. */
+
+static const int QM_MODULES = 1;
+static const int QM_DEPS = 2;
+static const int QM_REFS = 3;
+static const int QM_SYMBOLS = 4;
+static const int 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 *);
+
+
+#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
+static const int MODUTILS_OBJ_H = 1;
+
+#ident "$Id: insmod.c,v 1.48 2001/02/20 06:14:07 andersen Exp $"
+
+/* The relocatable object is manipulated using elfin types. */
+
+#include <stdio.h>
+#include <elf.h>
+
+
+/* Machine-specific elf macros for i386 et al. */
+
+/* the SH changes have only been tested on the SH4 in =little endian= mode */
+/* I'm not sure about big endian, so let's warn: */
+
+#if (defined(__SH4__) || defined(__SH3__)) && defined(__BIG_ENDIAN__)
+#error insmod.c may require changes for use on big endian SH4/SH3
+#endif
+
+/* it may or may not work on the SH1/SH2... So let's error on those
+ also */
+#if (defined(__sh__) && (!(defined(__SH3__) || defined(__SH4__))))
+#error insmod.c may require changes for non-SH3/SH4 use
+#endif
+
+#define ELFCLASSM ELFCLASS32
+#define ELFDATAM ELFDATA2LSB
+
+
+
+#if defined(__sh__)
+
+#define MATCH_MACHINE(x) (x == EM_SH)
+#define SHT_RELM SHT_RELA
+#define Elf32_RelM Elf32_Rela
+
+#elif defined(__arm__)
+
+#define MATCH_MACHINE(x) (x == EM_ARM)
+#define SHT_RELM SHT_REL
+#define Elf32_RelM Elf32_Rel
+
+#elif defined(__i386__)
+
+/* presumably we can use these for anything but the SH and ARM*/
+/* this is the previous behavior, but it does result in
+ insmod.c being broken on anything except 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
+
+#else
+#error Sorry, but insmod.c does not yet support this architecture...
+#endif
+
+#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 libc5. */
+#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
+
+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. */
+
+unsigned long obj_elf_hash(const char *);
+
+unsigned long obj_elf_hash_n(const char *, unsigned long len);
+
+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 *obj_find_symbol (struct obj_file *f,
+ const char *name);
+
+ElfW(Addr) obj_symbol_final_value(struct obj_file *f,
+ struct obj_symbol *sym);
+
+void obj_set_symbol_compare(struct obj_file *f,
+ int (*cmp)(const char *, const char *),
+ unsigned long (*hash)(const char *));
+
+struct obj_section *obj_find_section (struct obj_file *f,
+ const char *name);
+
+void obj_insert_section_load_order (struct obj_file *f,
+ struct obj_section *sec);
+
+struct obj_section *obj_create_alloced_section (struct obj_file *f,
+ const char *name,
+ unsigned long align,
+ unsigned long size);
+
+struct obj_section *obj_create_alloced_section_first (struct obj_file *f,
+ const char *name,
+ unsigned long align,
+ unsigned long size);
+
+void *obj_extend_section (struct obj_section *sec, unsigned long more);
+
+int obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
+ const char *string);
+
+int obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
+ struct obj_symbol *sym);
+
+int obj_check_undefineds(struct obj_file *f);
+
+void obj_allocate_commons(struct obj_file *f);
+
+unsigned long obj_load_size (struct obj_file *f);
+
+int obj_relocate (struct obj_file *f, ElfW(Addr) base);
+
+struct obj_file *obj_load(FILE *f);
+
+int obj_create_image (struct obj_file *f, char *image);
+
+/* Architecture specific manipulation routines. */
+
+struct obj_file *arch_new_file (void);
+
+struct obj_section *arch_new_section (void);
+
+struct obj_symbol *arch_new_symbol (void);
+
+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);
+
+int arch_create_got (struct obj_file *f);
+
+struct new_module;
+int arch_init_module (struct obj_file *f, struct new_module *);
+
+#endif /* obj.h */
+//----------------------------------------------------------------------------
+//--------end of modutils obj.h
+//----------------------------------------------------------------------------
+
+
+
+
#define _PATH_MODULES "/lib/modules"
+static const int STRVERSIONLEN = 32;
+
+/*======================================================================*/
+
+int flag_force_load = 0;
+int flag_autoclean = 0;
+int flag_verbose = 0;
+int flag_export = 1;
+
+
+/*======================================================================*/
+
+/* previously, these were named i386_* but since we could be
+ compiling for the sh, I've renamed them to the more general
+ arch_* These structures are the same between the x86 and SH,
+ and we can't support anything else right now anyway. In the
+ future maybe they should be #if defined'd */
+
+/* Done ;-) */
+
+#if defined(__arm__)
+struct arm_plt_entry
+{
+ int offset;
+ int allocated:1;
+ int inited:1; /* has been set up */
+};
+#endif
+
+struct arch_got_entry {
+ int offset;
+ unsigned offset_done:1;
+ unsigned reloc_done:1;
+};
+
+struct arch_file {
+ struct obj_file root;
+#if defined(__arm__)
+ struct obj_section *plt;
+#endif
+ struct obj_section *got;
+};
+
+struct arch_symbol {
+ struct obj_symbol root;
+#if defined(__arm__)
+ struct arm_plt_entry pltent;
+#endif
+ struct arch_got_entry gotent;
+};
+
+
+struct external_module {
+ const char *name;
+ ElfW(Addr) addr;
+ int used;
+ size_t nsyms;
+ struct new_module_symbol *syms;
+};
+
+struct new_module_symbol *ksyms;
+size_t nksyms;
+
+struct external_module *ext_modules;
+int n_ext_modules;
+int n_ext_modules_used;
-#warning "Danger Will Robinson, Danger!!!"
-#warning " "
-#warning "insmod is still under construction. Don't use it."
-#warning " "
-#warning " You have been warned!"
-#warning " "
/* Some firendly syscalls to cheer everyone's day... */
-_syscall2(int, init_module, const char *, name,
- const struct module *, info)
+#define __NR_new_sys_init_module __NR_init_module
+_syscall2(int, new_sys_init_module, const char *, name,
+ const struct new_module *, info)
+#define __NR_old_sys_init_module __NR_init_module
+_syscall5(int, old_sys_init_module, const char *, name, char *, code,
+ unsigned, codesize, struct old_mod_routines *, routines,
+ struct old_symbol_table *, symtab)
#ifndef BB_RMMOD
_syscall1(int, delete_module, const char *, name)
#else
extern int delete_module(const char *);
#endif
+/* This is kind of troublesome. See, we don't actually support
+ the m68k or the arm the same way we support i386 and (now)
+ sh. In doing my SH patch, I just assumed that whatever works
+ for i386 also works for m68k and arm since currently insmod.c
+ does nothing special for them. If this isn't true, the below
+ line is rather misleading IMHO, and someone should either
+ change it or add more proper architecture-dependent support
+ for these boys.
+
+ -- Bryan Rittmeyer <bryan@ixiacom.com> */
+
+#ifdef BB_FEATURE_OLD_MODULE_INTERFACE
+_syscall1(int, get_kernel_syms, struct old_kernel_sym *, ks)
+#endif
+
#if defined(__i386__) || defined(__m68k__) || defined(__arm__)
/* Jump through hoops to fixup error return codes */
#define __NR__create_module __NR_create_module
#endif
static char m_filename[BUFSIZ + 1] = "\0";
static char m_fullName[BUFSIZ + 1] = "\0";
-static const char insmod_usage[] =
- "insmod [OPTION]... MODULE [symbol=value]...\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nLoads the specified kernel modules into the kernel.\n\n"
- "Options:\n"
- "\t-f\tForce module to load into the wrong kernel version.\n"
- "\t-k\tMake module autoclean-able.\n"
-#endif
- ;
+/*======================================================================*/
-static int findNamedModule(const char *fileName, struct stat *statbuf)
+static int findNamedModule(const char *fileName, struct stat *statbuf,
+ void *userDate)
{
- if (m_fullName[0] == '\0')
+ char *fullName = (char *) userDate;
+
+
+ if (fullName[0] == '\0')
return (FALSE);
else {
- char *tmp = strrchr(fileName, '/');
+ char *tmp = strrchr((char *) fileName, '/');
if (tmp == NULL)
tmp = (char *) fileName;
else
tmp++;
- if (check_wildcard_match(tmp, m_fullName) == TRUE) {
+ if (check_wildcard_match(tmp, fullName) == TRUE) {
/* Stop searching if we find a match */
- memcpy(m_filename, fileName, strlen(fileName));
+ memcpy(m_filename, fileName, strlen(fileName)+1);
return (FALSE);
}
}
}
-extern int insmod_main(int argc, char **argv)
+/*======================================================================*/
+
+struct obj_file *arch_new_file(void)
{
- int len;
- char *tmp;
- char m_name[BUFSIZ + 1] = "\0";
- FILE *fp;
+ struct arch_file *f;
+ f = xmalloc(sizeof(*f));
+ f->got = NULL;
+ return &f->root;
+}
- if (argc <= 1) {
- usage(insmod_usage);
- }
+struct obj_section *arch_new_section(void)
+{
+ return xmalloc(sizeof(struct obj_section));
+}
- /* Parse any options */
- while (--argc > 0 && **(++argv) == '-') {
- while (*(++(*argv))) {
- switch (**argv) {
- case 'f':
- break;
- case 'k':
- break;
- default:
- usage(insmod_usage);
- }
- }
- }
+struct obj_symbol *arch_new_symbol(void)
+{
+ struct arch_symbol *sym;
+ sym = xmalloc(sizeof(*sym));
+ memset(&sym->gotent, 0, sizeof(sym->gotent));
+ return &sym->root;
+}
+
+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)
+{
+ struct arch_file *ifile = (struct arch_file *) f;
+ struct arch_symbol *isym = (struct arch_symbol *) sym;
- if (argc <= 0)
- usage(insmod_usage);
+ ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset);
+ ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset;
+ ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0;
+#if defined(__arm__)
+ ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
- /* Grab the module name */
- if ((tmp = strrchr(*argv, '/')) != NULL)
- tmp++;
- else
- tmp = *argv;
- len = strlen(tmp);
+ struct arm_plt_entry *pe;
+ unsigned long *ip;
+#endif
- if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o')
- len -= 2;
- memcpy(m_name, tmp, len);
- strcpy(m_fullName, m_name);
- strcat(m_fullName, ".o");
+ enum obj_reloc ret = obj_reloc_ok;
- /* Get a filedesc for the module */
- if ((fp = fopen(*argv, "r")) == NULL) {
- /* Hmpf. Could not open it. Search through _PATH_MODULES to find a module named m_name */
- if (recursiveAction(_PATH_MODULES, TRUE, FALSE, FALSE,
- findNamedModule, findNamedModule) == FALSE) {
- if (m_filename[0] == '\0'
- || ((fp = fopen(m_filename, "r")) == NULL)) {
- perror("No module by that name found in " _PATH_MODULES
- "\n");
- exit(FALSE);
- }
- }
- } else
- memcpy(m_filename, *argv, strlen(*argv));
+ switch (ELF32_R_TYPE(rel->r_info)) {
+
+/* even though these constants seem to be the same for
+ the i386 and the sh, we "#if define" them for clarity
+ and in case that ever changes */
+#if defined(__sh__)
+ case R_SH_NONE:
+#elif defined(__arm__)
+ case R_ARM_NONE:
+#elif defined(__i386__)
+ case R_386_NONE:
+#endif
+ break;
+#if defined(__sh__)
+ case R_SH_DIR32:
+#elif defined(__arm__)
+ case R_ARM_ABS32:
+#elif defined(__i386__)
+ case R_386_32:
+#endif
+ *loc += v;
+ break;
- fprintf(stderr, "m_filename='%s'\n", m_filename);
- fprintf(stderr, "m_name='%s'\n", m_name);
+#if defined(__arm__)
+#elif defined(__sh__)
+ case R_SH_REL32:
+ *loc += v - dot;
+ break;
+#elif defined(__i386__)
+ case R_386_PLT32:
+ case R_386_PC32:
+ *loc += v - dot;
+ break;
+#endif
+#if defined(__sh__)
+ case R_SH_PLT32:
+ *loc = v - dot;
+ break;
+#elif defined(__arm__)
+ case R_ARM_PC24:
+ case R_ARM_PLT32:
+ /* find the plt entry and initialize it if necessary */
+ assert(isym != NULL);
+ pe = (struct arm_plt_entry*) &isym->pltent;
+ if (! pe->inited) {
+ ip = (unsigned long *) (ifile->plt->contents + pe->offset);
+ ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */
+ ip[1] = v; /* sym@ */
+ pe->inited = 1;
+ }
- /* TODO: do something roughtly like this... */
-#if 0
+ /* relative distance to target */
+ v -= dot;
+ /* if the target is too far away.... */
+ if ((int)v < -0x02000000 || (int)v >= 0x02000000) {
+ /* go via the plt */
+ v = plt + pe->offset - dot;
+ }
+ if (v & 3)
+ ret = obj_reloc_dangerous;
- if ((f = obj_load(fp)) == NULL) {
- perror("Could not load the module\n");
- exit(FALSE);
- }
+ /* Convert to words. */
+ v >>= 2;
- /* Let the module know about the kernel symbols. */
- add_kernel_symbols(f);
+ /* merge the offset into the instruction. */
+ *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff);
+ break;
+#elif defined(__i386__)
+#endif
- if (!create_this_module(f, m_name)) {
- perror("Could not create the module\n");
- exit(FALSE);
- }
- if (!obj_check_undefineds(f, quiet)) {
- perror("Undefined symbols in the module\n");
- exit(FALSE);
- }
- obj_allocate_commons(f);
+#if defined(__arm__)
+#elif defined(__sh__)
+ case R_SH_GLOB_DAT:
+ case R_SH_JMP_SLOT:
+ *loc = v;
+ break;
+#elif defined(__i386__)
+ case R_386_GLOB_DAT:
+ case R_386_JMP_SLOT:
+ *loc = v;
+ break;
+#endif
+
+#if defined(__arm__)
+#elif defined(__sh__)
+ case R_SH_RELATIVE:
+ *loc += f->baseaddr + rel->r_addend;
+ break;
+#elif defined(__i386__)
+ case R_386_RELATIVE:
+ *loc += f->baseaddr;
+ break;
+#endif
+
+#if defined(__sh__)
+ case R_SH_GOTPC:
+#elif defined(__arm__)
+ case R_ARM_GOTPC:
+#elif defined(__i386__)
+ case R_386_GOTPC:
+#endif
+ assert(got != 0);
+#if defined(__sh__)
+ *loc += got - dot + rel->r_addend;;
+#elif defined(__i386__) || defined(__arm__)
+ *loc += got - dot;
+#endif
+ break;
- /* Perse the module's arguments */
- while (argc-- > 0 && *(argv++) != '\0') {
- if (!process_module_arguments(f, argc - optind, argv + optind)) {
- perror("Undefined symbols in the module\n");
- exit(FALSE);
+#if defined(__sh__)
+ case R_SH_GOT32:
+#elif defined(__arm__)
+ case R_ARM_GOT32:
+#elif defined(__i386__)
+ case R_386_GOT32:
+#endif
+ assert(isym != NULL);
+ /* needs an entry in the .got: set it, once */
+ if (!isym->gotent.reloc_done) {
+ isym->gotent.reloc_done = 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__)
+ *loc += isym->gotent.offset;
+#endif
+ break;
+
+ /* address relative to the got */
+#if defined(__sh__)
+ case R_SH_GOTOFF:
+#elif defined(__arm__)
+ case R_ARM_GOTOFF:
+#elif defined(__i386__)
+ case R_386_GOTOFF:
+#endif
+ assert(got != 0);
+ *loc += v - got;
+ break;
+
+ default:
+ printf("Warning: unhandled reloc %d\n",(int)ELF32_R_TYPE(rel->r_info));
+ ret = obj_reloc_unhandled;
+ break;
}
- /* Find current size of the module */
- m_size = obj_load_size(f);
+ return ret;
+}
+
+int arch_create_got(struct obj_file *f)
+{
+ struct arch_file *ifile = (struct arch_file *) f;
+ int i, got_offset = 0, gotneeded = 0;
+#if defined(__arm__)
+ int plt_offset = 0, pltneeded = 0;
+#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;
- errno = 0;
- m_addr = create_module(m_name, m_size);
- switch (errno) {
- /* yada yada */
- default:
- perror("create_module: %m");
+ 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[ELF32_R_SYM(rel->r_info)];
+
+ switch (ELF32_R_TYPE(rel->r_info)) {
+#if defined(__arm__)
+ case R_ARM_GOT32:
+#elif defined(__sh__)
+ case R_SH_GOT32:
+#elif defined(__i386__)
+ case R_386_GOT32:
+#endif
+ break;
+
+#if defined(__arm__)
+ case R_ARM_PC24:
+ case R_ARM_PLT32:
+ pltneeded = 1;
+ break;
+
+ case R_ARM_GOTPC:
+ case R_ARM_GOTOFF:
+ gotneeded = 1;
+ if (got_offset == 0)
+ got_offset = 4;
+#elif defined(__sh__)
+ case R_SH_GOTPC:
+ case R_SH_GOTOFF:
+ gotneeded = 1;
+#elif defined(__i386__)
+ case R_386_GOTPC:
+ case R_386_GOTOFF:
+ gotneeded = 1;
+#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 (!intsym->gotent.offset_done) {
+ intsym->gotent.offset_done = 1;
+ intsym->gotent.offset = got_offset;
+ got_offset += 4;
+ }
+#if defined(__arm__)
+ if (pltneeded && intsym->pltent.allocated == 0) {
+ intsym->pltent.allocated = 1;
+ intsym->pltent.offset = plt_offset;
+ plt_offset += 8;
+ intsym->pltent.inited = 0;
+ pltneeded = 0;
+ }
#endif
+ }
+ }
+
+#if defined(__arm__)
+ if (got_offset) {
+ struct obj_section* relsec = obj_find_section(f, ".got");
+
+ if (relsec) {
+ obj_extend_section(relsec, got_offset);
+ } else {
+ relsec = obj_create_alloced_section(f, ".got", 8, got_offset);
+ assert(relsec);
+ }
+
+ ifile->got = relsec;
+ }
+
+ if (plt_offset)
+ ifile->plt = obj_create_alloced_section(f, ".plt", 8, plt_offset);
+#else
+ if (got_offset > 0 || gotneeded)
+ ifile->got = obj_create_alloced_section(f, ".got", 4, got_offset);
+#endif
+
+ return 1;
+}
+
+int arch_init_module(struct obj_file *f, struct new_module *mod)
+{
+ return 1;
+}
+
+
+/*======================================================================*/
+
+/* Standard ELF hash function. */
+inline 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;
+ if ((g = (h & 0xf0000000)) != 0) {
+ h ^= g >> 24;
+ h &= ~g;
+ }
+ n--;
+ }
+ return h;
+}
+
+unsigned long obj_elf_hash(const char *name)
+{
+ return obj_elf_hash_n(name, strlen(name));
+}
+
+#ifdef BB_FEATURE_INSMOD_VERSION_CHECKING
+/* Get the kernel version in the canonical integer form. */
+
+static int get_kernel_version(char str[STRVERSIONLEN])
+{
+ struct utsname uts_info;
+ char *p, *q;
+ int a, b, c;
+
+ if (uname(&uts_info) < 0)
+ return -1;
+ strncpy(str, uts_info.release, STRVERSIONLEN);
+ p = uts_info.release;
+
+ 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;
+}
+
+/* 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);
+}
+
+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 /* BB_FEATURE_INSMOD_VERSION_CHECKING */
+
+
+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 = ELFW(ST_TYPE) (info);
+ int n_binding = ELFW(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 = ELFW(ST_TYPE) (o_info);
+ int o_binding = ELFW(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)
+ 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 (ELFW(ST_BIND) (info) == STB_LOCAL)
+ f->local_symtab[symidx] = sym;
+
+ found:
+ sym->name = name;
+ sym->value = value;
+ sym->size = size;
+ sym->secidx = secidx;
+ sym->info = info;
+
+ return sym;
+}
+
+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;
+}
+
+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;
+ }
+}
+
+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;
+}
+
+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;
+}
+
+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(f->sections, (newidx + 1) * sizeof(sec));
+ f->sections[newidx] = sec = arch_new_section();
+
+ memset(sec, 0, sizeof(*sec));
+ 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;
+}
+
+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();
+
+ memset(sec, 0, sizeof(*sec));
+ 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;
+}
+
+void *obj_extend_section(struct obj_section *sec, unsigned long more)
+{
+ unsigned long oldsize = sec->header.sh_size;
+ sec->contents = xrealloc(sec->contents, sec->header.sh_size += more);
+ 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;
+
+ 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;
+
+ sym = obj_find_symbol(f, (char *) s->name);
+ if (sym && !ELFW(ST_BIND) (sym->info) == STB_LOCAL) {
+ sym = obj_add_symbol(f, (char *) s->name, -1,
+ ELFW(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 in pre 2.1 kernels. */
+
+static int
+old_process_module_arguments(struct obj_file *f, int argc, char **argv)
+{
+ while (argc > 0) {
+ char *p, *q;
+ struct obj_symbol *sym;
+ int *loc;
+
+ p = *argv;
+ if ((q = strchr(p, '=')) == NULL) {
+ argc--;
+ continue;
+ }
+ *q++ = '\0';
+
+ sym = obj_find_symbol(f, p);
+
+ /* Also check that the parameter was not resolved from the kernel. */
+ if (sym == NULL || sym->secidx > SHN_HIRESERVE) {
+ error_msg("symbol for parameter %s not found", p);
+ return 0;
+ }
+
+ loc = (int *) (f->sections[sym->secidx]->contents + sym->value);
+
+ /* Do C quoting if we begin with a ". */
+ if (*q == '"') {
+ char *r, *str;
+
+ str = alloca(strlen(q));
+ for (r = str, q++; *q != '"'; ++q, ++r) {
+ if (*q == '\0') {
+ error_msg("improperly terminated string argument for %s", p);
+ return 0;
+ } else 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';
+ obj_string_patch(f, sym->secidx, sym->value, str);
+ } else if (*q >= '0' && *q <= '9') {
+ do
+ *loc++ = strtoul(q, &q, 0);
+ while (*q++ == ',');
+ } else {
+ char *contents = f->sections[sym->secidx]->contents;
+ char *loc = contents + sym->value;
+ char *r; /* To search for commas */
+
+ /* Break the string with comas */
+ while ((r = strchr(q, ',')) != (char *) NULL) {
+ *r++ = '\0';
+ obj_string_patch(f, sym->secidx, loc - contents, q);
+ loc += sizeof(char *);
+ q = r;
+ }
+
+ /* last part */
+ obj_string_patch(f, sym->secidx, loc - contents, q);
+ }
+
+ argc--, argv++;
+ }
+
+ return 1;
+}
+
+#ifdef BB_FEATURE_INSMOD_VERSION_CHECKING
+static int old_is_module_checksummed(struct obj_file *f)
+{
+ return obj_find_symbol(f, "Using_Versions") != NULL;
+}
+/* Get the module's kernel version in the canonical integer form. */
+
+static int
+old_get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
+{
+ struct obj_symbol *sym;
+ char *p, *q;
+ int a, b, c;
+
+ sym = obj_find_symbol(f, "kernel_version");
+ if (sym == NULL)
+ return -1;
+
+ p = f->sections[sym->secidx]->contents + sym->value;
+ 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 /* BB_FEATURE_INSMOD_VERSION_CHECKING */
+
+#ifdef BB_FEATURE_OLD_MODULE_INTERFACE
+
+/* Fetch all the symbols and divvy them up as appropriate for the modules. */
+
+static int old_get_kernel_symbols(const char *m_name)
+{
+ struct old_kernel_sym *ks, *k;
+ struct new_module_symbol *s;
+ struct external_module *mod;
+ int nks, nms, nmod, i;
+
+ nks = get_kernel_syms(NULL);
+ if (nks < 0) {
+ perror_msg("get_kernel_syms: %s", m_name);
+ return 0;
+ }
+
+ ks = k = xmalloc(nks * sizeof(*ks));
+
+ if (get_kernel_syms(ks) != nks) {
+ perror("inconsistency with get_kernel_syms -- is someone else "
+ "playing with modules?");
+ free(ks);
+ return 0;
+ }
+
+ /* Collect the module information. */
+
+ mod = NULL;
+ nmod = -1;
+
+ while (k->name[0] == '#' && k->name[1]) {
+ struct old_kernel_sym *k2;
+ struct new_module_symbol *s;
+
+ /* Find out how many symbols this module has. */
+ for (k2 = k + 1; k2->name[0] != '#'; ++k2)
+ continue;
+ nms = k2 - k - 1;
+
+ mod = xrealloc(mod, (++nmod + 1) * sizeof(*mod));
+ mod[nmod].name = k->name + 1;
+ mod[nmod].addr = k->value;
+ mod[nmod].used = 0;
+ mod[nmod].nsyms = nms;
+ mod[nmod].syms = s = (nms ? xmalloc(nms * sizeof(*s)) : NULL);
+
+ for (i = 0, ++k; i < nms; ++i, ++s, ++k) {
+ s->name = (unsigned long) k->name;
+ s->value = k->value;
+ }
+
+ k = k2;
+ }
+
+ ext_modules = mod;
+ n_ext_modules = nmod + 1;
+
+ /* Now collect the symbols for the kernel proper. */
+
+ if (k->name[0] == '#')
+ ++k;
+
+ nksyms = nms = nks - (k - ks);
+ ksyms = s = (nms ? xmalloc(nms * sizeof(*s)) : NULL);
+
+ for (i = 0; i < nms; ++i, ++s, ++k) {
+ s->name = (unsigned long) k->name;
+ s->value = k->value;
+ }
+
+ return 1;
+}
+
+/* Return the kernel symbol checksum version, or zero if not used. */
+
+static int old_is_kernel_checksummed(void)
+{
+ /* Using_Versions is the first symbol. */
+ if (nksyms > 0
+ && strcmp((char *) ksyms[0].name,
+ "Using_Versions") == 0) return ksyms[0].value;
+ else
+ return 0;
+}
+
+
+static int old_create_mod_use_count(struct obj_file *f)
+{
+ struct obj_section *sec;
+
+ sec = obj_create_alloced_section_first(f, ".moduse", sizeof(long),
+ sizeof(long));
+
+ obj_add_symbol(f, "mod_use_count_", -1,
+ ELFW(ST_INFO) (STB_LOCAL, STT_OBJECT), sec->idx, 0,
+ sizeof(long));
+
+ return 1;
+}
+
+static int
+old_init_module(const char *m_name, struct obj_file *f,
+ unsigned long m_size)
+{
+ char *image;
+ struct old_mod_routines routines;
+ struct old_symbol_table *symtab;
+ int ret;
+
+ /* Create the symbol table */
+ {
+ int nsyms = 0, strsize = 0, total;
+
+ /* Size things first... */
+ if (flag_export) {
+ int i;
+ for (i = 0; i < HASH_BUCKETS; ++i) {
+ struct obj_symbol *sym;
+ for (sym = f->symtab[i]; sym; sym = sym->next)
+ if (ELFW(ST_BIND) (sym->info) != STB_LOCAL
+ && sym->secidx <= SHN_HIRESERVE)
+ {
+ sym->ksymidx = nsyms++;
+ strsize += strlen(sym->name) + 1;
+ }
+ }
+ }
+
+ total = (sizeof(struct old_symbol_table)
+ + nsyms * sizeof(struct old_module_symbol)
+ + n_ext_modules_used * sizeof(struct old_module_ref)
+ + strsize);
+ symtab = xmalloc(total);
+ symtab->size = total;
+ symtab->n_symbols = nsyms;
+ symtab->n_refs = n_ext_modules_used;
+
+ if (flag_export && nsyms) {
+ struct old_module_symbol *ksym;
+ char *str;
+ int i;
+
+ ksym = symtab->symbol;
+ str = ((char *) ksym + nsyms * sizeof(struct old_module_symbol)
+ + n_ext_modules_used * sizeof(struct old_module_ref));
+
+ for (i = 0; i < HASH_BUCKETS; ++i) {
+ struct obj_symbol *sym;
+ for (sym = f->symtab[i]; sym; sym = sym->next)
+ if (sym->ksymidx >= 0) {
+ ksym->addr = obj_symbol_final_value(f, sym);
+ ksym->name =
+ (unsigned long) str - (unsigned long) symtab;
+
+ strcpy(str, sym->name);
+ str += strlen(sym->name) + 1;
+ ksym++;
+ }
+ }
+ }
+
+ if (n_ext_modules_used) {
+ struct old_module_ref *ref;
+ int i;
+
+ ref = (struct old_module_ref *)
+ ((char *) symtab->symbol + nsyms * sizeof(struct old_module_symbol));
+
+ for (i = 0; i < n_ext_modules; ++i)
+ if (ext_modules[i].used)
+ ref++->module = ext_modules[i].addr;
+ }
+ }
+
+ /* Fill in routines. */
+
+ routines.init =
+ obj_symbol_final_value(f, obj_find_symbol(f, "init_module"));
+ routines.cleanup =
+ obj_symbol_final_value(f, obj_find_symbol(f, "cleanup_module"));
+
+ /* 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);
+
+ /* image holds the complete relocated module, accounting correctly for
+ mod_use_count. However the old module kernel support assume that
+ it is receiving something which does not contain mod_use_count. */
+ ret = old_sys_init_module(m_name, image + sizeof(long),
+ m_size | (flag_autoclean ? OLD_MOD_AUTOCLEAN
+ : 0), &routines, symtab);
+ if (ret)
+ perror_msg("init_module: %s", m_name);
+
+ free(image);
+ free(symtab);
+
+ return ret == 0;
+}
+
+#else
+
+#define old_create_mod_use_count(x) TRUE
+#define old_init_module(x, y, z) TRUE
+
+#endif /* BB_FEATURE_OLD_MODULE_INTERFACE */
+
+
+
+/*======================================================================*/
+/* Functions relating to module loading after 2.1.18. */
+
+static int
+new_process_module_arguments(struct obj_file *f, int argc, char **argv)
+{
+ while (argc > 0) {
+ char *p, *q, *key;
+ struct obj_symbol *sym;
+ char *contents, *loc;
+ int min, max, n;
+
+ p = *argv;
+ if ((q = strchr(p, '=')) == 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) {
+ error_msg("invalid parameter %s", key);
+ return 0;
+ }
+
+ sym = obj_find_symbol(f, key);
+
+ /* Also check that the parameter was not resolved from the kernel. */
+ if (sym == NULL || sym->secidx > SHN_HIRESERVE) {
+ error_msg("symbol for parameter %s not found", key);
+ return 0;
+ }
+
+ 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') {
+ error_msg("improperly terminated string argument for %s",
+ key);
+ return 0;
+ } else 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 usefull, as the previous case
+ doesn't null terminate the string ??? */
+ str[r - q] = '\0';
+
+ /* Keep next fields */
+ q = r;
+ } else {
+ /* last string */
+ str = q;
+ q = "";
+ }
+ }
+
+ 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))) {
+ error_msg("parameter type 'c' for %s must be followed by"
+ " the maximum size", key);
+ return 0;
+ }
+ charssize = strtoul(p + 1, (char **) NULL, 10);
+
+ /* Check length */
+ if (strlen(str) >= charssize) {
+ error_msg("string too long for %s (max %ld)", key,
+ charssize - 1);
+ return 0;
+ }
+
+ /* 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:
+ error_msg("unknown parameter type '%c' for %s", *p, key);
+ return 0;
+ }
+ }
+
+ 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) {
+ error_msg("too many values for %s (max %d)", key, max);
+ return 0;
+ }
+ ++q;
+ break;
+
+ default:
+ error_msg("invalid argument syntax for %s", key);
+ return 0;
+ }
+ }
+
+ end_of_arg:
+ if (n < min) {
+ error_msg("too few values for %s (min %d)", key, min);
+ return 0;
+ }
+
+ argc--, argv++;
+ }
+
+ return 1;
+}
+
+#ifdef BB_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 atoi(p);
+ else
+ 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;
+ 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 /* BB_FEATURE_INSMOD_VERSION_CHECKING */
+
+
+#ifdef BB_FEATURE_NEW_MODULE_INTERFACE
+
+/* Fetch the loaded modules, and all currently exported symbols. */
+
+static int 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. */
+
+ module_names = xmalloc(bufsize = 256);
+ retry_modules_load:
+ if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) {
+ if (errno == ENOSPC) {
+ module_names = xrealloc(module_names, bufsize = ret);
+ goto retry_modules_load;
+ }
+ perror_msg("QM_MODULES");
+ return 0;
+ }
+
+ n_ext_modules = nmod = ret;
+ ext_modules = modules = xmalloc(nmod * sizeof(*modules));
+ memset(modules, 0, nmod * sizeof(*modules));
+
+ /* Collect the modules' symbols. */
+
+ 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;
+ }
+ perror_msg("query_module: QM_INFO: %s", mn);
+ return 0;
+ }
+
+ syms = xmalloc(bufsize = 1024);
+ retry_mod_sym_load:
+ if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) {
+ switch (errno) {
+ case ENOSPC:
+ syms = xrealloc(syms, bufsize = ret);
+ goto retry_mod_sym_load;
+ case ENOENT:
+ /* The module was removed out from underneath us. */
+ continue;
+ default:
+ perror_msg("query_module: QM_SYMBOLS: %s", mn);
+ return 0;
+ }
+ }
+ 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) {
+ syms = xrealloc(syms, bufsize = ret);
+ goto retry_kern_sym_load;
+ }
+ perror_msg("kernel: QM_SYMBOLS");
+ return 0;
+ }
+ nksyms = nsyms = ret;
+ ksyms = syms;
+
+ for (j = 0, s = syms; j < nsyms; ++j, ++s) {
+ s->name += (unsigned long) syms;
+ }
+ return 1;
+}
+
+
+/* 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 int 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, "__this_module", -1,
+ ELFW(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);
+
+ return 1;
+}
+
+
+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, "__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_export && !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 (ELFW(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");
+ 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, "init_module"));
+ module->cleanup =
+ obj_symbol_final_value(f, obj_find_symbol(f, "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;
+ }
+
+ if (!arch_init_module(f, module))
+ return 0;
+
+ /* 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 = new_sys_init_module(m_name, (struct new_module *) image);
+ if (ret)
+ perror_msg("init_module: %s", m_name);
+
+ free(image);
+
+ return ret == 0;
+}
+
+#else
+
+#define new_init_module(x, y, z) TRUE
+#define new_create_this_module(x, y) 0
+#define new_create_module_ksymtab(x)
+#define query_module(v, w, x, y, z) -1
+
+#endif /* BB_FEATURE_NEW_MODULE_INTERFACE */
+
+
+/*======================================================================*/
+
+int
+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);
+
+ return 1;
+}
+
+int
+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;
+
+ return 1;
+}
+
+int obj_check_undefineds(struct obj_file *f)
+{
+ unsigned long i;
+ int ret = 1;
+
+ 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 (ELFW(ST_BIND) (sym->info) == STB_WEAK) {
+ sym->secidx = SHN_ABS;
+ sym->value = 0;
+ } else {
+ error_msg("unresolved symbol %s", sym->name);
+ ret = 0;
+ }
+ }
+ }
+
+ return ret;
+}
+
+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(f->sections, (i + 1) * sizeof(sec));
+ f->sections[i] = sec = arch_new_section();
+ f->header.e_shnum = i + 1;
+
+ memset(sec, 0, sizeof(*sec));
+ 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;
+ }
+ }
+}
+
+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;
+}
+
+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 = ELFW(R_SYM) (rel->r_info);
+ if (symndx) {
+ /* Note we've already checked for undefined symbols. */
+
+ extsym = &symtab[symndx];
+ if (ELFW(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 ||
+ ELFW(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) {
+ error_msg("%s of type %ld for %s", errmsg,
+ (long) ELFW(R_TYPE) (rel->r_info),
+ strtab + extsym->st_name);
+ } else {
+ error_msg("%s of type %ld", errmsg,
+ (long) ELFW(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;
+}
+
+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->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;
+}
+
+/*======================================================================*/
+
+struct obj_file *obj_load(FILE * fp)
+{
+ struct obj_file *f;
+ ElfW(Shdr) * section_headers;
+ int shnum, i;
+ char *shstrtab;
+
+ /* Read the file header. */
+
+ f = arch_new_file();
+ memset(f, 0, sizeof(*f));
+ 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) {
+ perror_msg("error reading ELF header");
+ return NULL;
+ }
+
+ 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) {
+ error_msg("not an ELF file");
+ return NULL;
+ }
+ if (f->header.e_ident[EI_CLASS] != ELFCLASSM
+ || f->header.e_ident[EI_DATA] != ELFDATAM
+ || f->header.e_ident[EI_VERSION] != EV_CURRENT
+ || !MATCH_MACHINE(f->header.e_machine)) {
+ error_msg("ELF file not for this architecture");
+ return NULL;
+ }
+ if (f->header.e_type != ET_REL) {
+ error_msg("ELF file not a relocatable object");
+ return NULL;
+ }
+
+ /* Read the section headers. */
+
+ if (f->header.e_shentsize != sizeof(ElfW(Shdr))) {
+ error_msg("section header size mismatch: %lu != %lu",
+ (unsigned long) f->header.e_shentsize,
+ (unsigned long) sizeof(ElfW(Shdr)));
+ return NULL;
+ }
+
+ 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) {
+ perror_msg("error reading ELF section headers");
+ return NULL;
+ }
+
+ /* Read the section data. */
+
+ for (i = 0; i < shnum; ++i) {
+ struct obj_section *sec;
+
+ f->sections[i] = sec = arch_new_section();
+ memset(sec, 0, sizeof(*sec));
+
+ sec->header = section_headers[i];
+ sec->idx = i;
+
+ switch (sec->header.sh_type) {
+ case SHT_NULL:
+ case SHT_NOTE:
+ case SHT_NOBITS:
+ /* ignore */
+ break;
+
+ case SHT_PROGBITS:
+ 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) {
+ perror_msg("error reading ELF section data");
+ return NULL;
+ }
+ } else {
+ sec->contents = NULL;
+ }
+ break;
+
+#if SHT_RELM == SHT_REL
+ case SHT_RELA:
+ error_msg("RELA relocations not supported on this architecture");
+ return NULL;
+#else
+ case SHT_REL:
+ error_msg("REL relocations not supported on this architecture");
+ return NULL;
+#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;
+ }
+
+ error_msg("can't handle sections of type %ld",
+ (long) sec->header.sh_type);
+ return NULL;
+ }
+ }
+
+ /* 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];
+
+ 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))) {
+ error_msg("symbol size mismatch: %lu != %lu",
+ (unsigned long) sec->header.sh_entsize,
+ (unsigned long) sizeof(ElfW(Sym)));
+ return NULL;
+ }
+
+ 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 = xmalloc(j *=
+ sizeof(struct obj_symbol *));
+ memset(f->local_symtab, 0, j);
+
+ /* Insert all symbols into the hash table. */
+ for (j = 1, ++sym; j < nsym; ++j, ++sym) {
+ const char *name;
+ if (sym->st_name)
+ name = strtab + sym->st_name;
+ else
+ name = f->sections[sym->st_shndx]->name;
+
+ obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx,
+ sym->st_value, sym->st_size);
+ }
+ }
+ break;
+
+ case SHT_RELM:
+ if (sec->header.sh_entsize != sizeof(ElfW(RelM))) {
+ error_msg("relocation entry size mismatch: %lu != %lu",
+ (unsigned long) sec->header.sh_entsize,
+ (unsigned long) sizeof(ElfW(RelM)));
+ return NULL;
+ }
+ break;
+ }
+ }
+
+ return f;
+}
+
+static void hide_special_symbols(struct obj_file *f)
+{
+ static const char *const specials[] = {
+ "cleanup_module",
+ "init_module",
+ "kernel_version",
+ NULL
+ };
+
+ struct obj_symbol *sym;
+ const char *const *p;
+
+ for (p = specials; *p; ++p)
+ if ((sym = obj_find_symbol(f, *p)) != NULL)
+ sym->info =
+ ELFW(ST_INFO) (STB_LOCAL, ELFW(ST_TYPE) (sym->info));
+}
+
+
+
+extern int insmod_main( int argc, char **argv)
+{
+ int opt;
+ int k_crcs;
+ int k_new_syscalls;
+ int len;
+ char *tmp;
+ unsigned long m_size;
+ ElfW(Addr) m_addr;
+ FILE *fp;
+ struct obj_file *f;
+ struct stat st;
+ char m_name[BUFSIZ + 1] = "\0";
+ int exit_status = EXIT_FAILURE;
+ int m_has_modinfo;
+#ifdef BB_FEATURE_INSMOD_VERSION_CHECKING
+ int k_version;
+ char k_strversion[STRVERSIONLEN];
+ char m_strversion[STRVERSIONLEN];
+ int m_version;
+ int m_crcs;
+#endif
+
+ /* Parse any options */
+ while ((opt = getopt(argc, argv, "fkvxLo:")) > 0) {
+ switch (opt) {
+ case 'f': /* force loading */
+ flag_force_load = 1;
+ break;
+ case 'k': /* module loaded by kerneld, auto-cleanable */
+ flag_autoclean = 1;
+ break;
+ case 'v': /* verbose output */
+ flag_verbose = 1;
+ break;
+ case 'x': /* do not export externs */
+ flag_export = 0;
+ break;
+ case 'o': /* name the output module */
+ strncpy(m_name, optarg, BUFSIZ);
+ break;
+ case 'L': /* Stub warning */
+ /* This is needed for 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. */
+ break;
+ default:
+ show_usage();
+ }
+ }
+
+ if (argv[optind] == NULL) {
+ show_usage();
+ }
+
+ /* Grab the module name */
+ if ((tmp = strrchr(argv[optind], '/')) != NULL) {
+ tmp++;
+ } else {
+ tmp = argv[optind];
+ }
+ len = strlen(tmp);
+
+ if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o')
+ len -= 2;
+ strncpy(m_fullName, tmp, len);
+ if (*m_name == '\0') {
+ strcpy(m_name, m_fullName);
+ }
+ strcat(m_fullName, ".o");
+
+ /* Get a filedesc for the module */
+ if (stat(argv[optind], &st) < 0 || !S_ISREG(st.st_mode) ||
+ (fp = fopen(argv[optind], "r")) == NULL) {
+ /* Hmpf. Could not open it. Search through _PATH_MODULES to find a module named m_name */
+ if (recursive_action(_PATH_MODULES, TRUE, FALSE, FALSE,
+ findNamedModule, 0, m_fullName) == FALSE)
+ {
+ if (m_filename[0] == '\0'
+ || ((fp = fopen(m_filename, "r")) == NULL))
+ {
+ error_msg("No module named '%s' found in '%s'", m_fullName, _PATH_MODULES);
+ return EXIT_FAILURE;
+ }
+ } else
+ error_msg_and_die("No module named '%s' found in '%s'", m_fullName, _PATH_MODULES);
+ } else
+ memcpy(m_filename, argv[optind], strlen(argv[optind]));
+
+
+ if ((f = obj_load(fp)) == NULL)
+ perror_msg_and_die("Could not load the module");
+
+ if (get_modinfo_value(f, "kernel_version") == NULL)
+ m_has_modinfo = 0;
+ else
+ m_has_modinfo = 1;
+
+#ifdef BB_FEATURE_INSMOD_VERSION_CHECKING
+ /* Version correspondence? */
+
+ k_version = get_kernel_version(k_strversion);
+ if (m_has_modinfo) {
+ m_version = new_get_module_version(f, m_strversion);
+ } else {
+ m_version = old_get_module_version(f, m_strversion);
+ if (m_version == -1) {
+ error_msg("couldn't find the kernel version the module was "
+ "compiled for");
+ goto out;
+ }
+ }
+
+ if (strncmp(k_strversion, m_strversion, STRVERSIONLEN) != 0) {
+ if (flag_force_load) {
+ error_msg("Warning: kernel-module version mismatch\n"
+ "\t%s was compiled for kernel version %s\n"
+ "\twhile this kernel is version %s",
+ m_filename, m_strversion, k_strversion);
+ } else {
+ error_msg("kernel-module version mismatch\n"
+ "\t%s was compiled for kernel version %s\n"
+ "\twhile this kernel is version %s.",
+ m_filename, m_strversion, k_strversion);
+ goto out;
+ }
+ }
+ k_crcs = 0;
+#endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */
+
+ k_new_syscalls = !query_module(NULL, 0, NULL, 0, NULL);
+
+ if (k_new_syscalls) {
+#ifdef BB_FEATURE_NEW_MODULE_INTERFACE
+ if (!new_get_kernel_symbols())
+ goto out;
+ k_crcs = new_is_kernel_checksummed();
+#else
+ error_msg("Not configured to support new kernels");
+ goto out;
+#endif
+ } else {
+#ifdef BB_FEATURE_OLD_MODULE_INTERFACE
+ if (!old_get_kernel_symbols(m_name))
+ goto out;
+ k_crcs = old_is_kernel_checksummed();
+#else
+ error_msg("Not configured to support old kernels");
+ goto out;
+#endif
+ }
+
+#ifdef BB_FEATURE_INSMOD_VERSION_CHECKING
+ if (m_has_modinfo)
+ m_crcs = new_is_module_checksummed(f);
+ else
+ m_crcs = old_is_module_checksummed(f);
+
+ if (m_crcs != k_crcs)
+ obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash);
+#endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */
+
+ /* Let the module know about the kernel symbols. */
+ add_kernel_symbols(f);
+
+ /* Allocate common symbols, symbol tables, and string tables. */
+
+ if (k_new_syscalls
+ ? !new_create_this_module(f, m_name)
+ : !old_create_mod_use_count(f))
+ {
+ goto out;
+ }
+
+ if (!obj_check_undefineds(f)) {
+ goto out;
+ }
+ obj_allocate_commons(f);
+
+ /* done with the module name, on to the optional var=value arguments */
+ ++optind;
+
+ if (optind < argc) {
+ if (m_has_modinfo
+ ? !new_process_module_arguments(f, argc - optind, argv + optind)
+ : !old_process_module_arguments(f, argc - optind, argv + optind))
+ {
+ goto out;
+ }
+ }
+
+ arch_create_got(f);
+ hide_special_symbols(f);
+
+ if (k_new_syscalls)
+ 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==-1) switch (errno) {
+ case EEXIST:
+ error_msg("A module named %s already exists", m_name);
+ goto out;
+ case ENOMEM:
+ error_msg("Can't allocate kernel memory for module; needed %lu bytes",
+ m_size);
+ goto out;
+ default:
+ perror_msg("create_module: %s", m_name);
+ goto out;
+ }
+
+ if (!obj_relocate(f, m_addr)) {
+ delete_module(m_name);
+ goto out;
+ }
+
+ if (k_new_syscalls
+ ? !new_init_module(m_name, f, m_size)
+ : !old_init_module(m_name, f, m_size))
+ {
+ delete_module(m_name);
+ goto out;
+ }
+
+ exit_status = EXIT_SUCCESS;
+out:
fclose(fp);
- exit(TRUE);
+ return(exit_status);
}
projects / oweals / busybox.git / blobdiff