diff options
Diffstat (limited to 'release/src/router/busybox/modutils/insmod.c')
| -rw-r--r-- | release/src/router/busybox/modutils/insmod.c | 4236 |
1 files changed, 24 insertions, 4212 deletions
diff --git a/release/src/router/busybox/modutils/insmod.c b/release/src/router/busybox/modutils/insmod.c index e917b9b0..90ed87a7 100644 --- a/release/src/router/busybox/modutils/insmod.c +++ b/release/src/router/busybox/modutils/insmod.c @@ -2,4228 +2,40 @@ /* * Mini insmod implementation for busybox * - * This version of insmod supports x86, ARM, SH3/4, powerpc, m68k, - * MIPS, and v850e. + * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi> * - * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen - * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org> - * and Ron Alder <alder@lineo.com> - * - * 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. - * - * 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 CONFIG_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 - * - * 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 - * - */ - -#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 <fcntl.h> -#include <sys/utsname.h> -#include "busybox.h" - -#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE -# undef CONFIG_FEATURE_OLD_MODULE_INTERFACE -# define new_sys_init_module init_module -#else -# define old_sys_init_module init_module -#endif - -#ifdef CONFIG_FEATURE_INSMOD_LOADINKMEM -#define LOADBITS 0 -#else -#define LOADBITS 1 -#endif - - -#if defined(__arm__) -#define CONFIG_USE_PLT_ENTRIES -#define CONFIG_PLT_ENTRY_SIZE 8 -#define CONFIG_USE_GOT_ENTRIES -#define CONFIG_GOT_ENTRY_SIZE 8 -#define CONFIG_USE_SINGLE - -#define MATCH_MACHINE(x) (x == EM_ARM) -#define SHT_RELM SHT_REL -#define Elf32_RelM Elf32_Rel -#define ELFCLASSM ELFCLASS32 -#endif - -#if defined(__s390__) -#define CONFIG_USE_PLT_ENTRIES -#define CONFIG_PLT_ENTRY_SIZE 8 -#define CONFIG_USE_GOT_ENTRIES -#define CONFIG_GOT_ENTRY_SIZE 8 -#define CONFIG_USE_SINGLE - -#define MATCH_MACHINE(x) (x == EM_S390) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#endif - -#if defined(__i386__) -#define CONFIG_USE_GOT_ENTRIES -#define CONFIG_GOT_ENTRY_SIZE 4 -#define CONFIG_USE_SINGLE - -#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 -#endif - -#if defined(__mc68000__) -#define CONFIG_USE_GOT_ENTRIES -#define CONFIG_GOT_ENTRY_SIZE 4 -#define CONFIG_USE_SINGLE - -#define MATCH_MACHINE(x) (x == EM_68K) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#endif - -#if defined(__mips__) -/* 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 MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE) -#define SHT_RELM SHT_REL -#define Elf32_RelM Elf32_Rel -#define ELFCLASSM ELFCLASS32 -#define ARCHDATAM "__dbe_table" -#endif - -#if defined(__powerpc__) -#define CONFIG_USE_PLT_ENTRIES -#define CONFIG_PLT_ENTRY_SIZE 16 -#define CONFIG_USE_PLT_LIST -#define CONFIG_LIST_ARCHTYPE ElfW(Addr) -#define CONFIG_USE_LIST - -#define MATCH_MACHINE(x) (x == EM_PPC) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 -#define ARCHDATAM "__ftr_fixup" -#endif - -#if defined(__sh__) -#define CONFIG_USE_GOT_ENTRIES -#define CONFIG_GOT_ENTRY_SIZE 4 -#define CONFIG_USE_SINGLE - -#define MATCH_MACHINE(x) (x == EM_SH) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela -#define ELFCLASSM ELFCLASS32 - -/* 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 -#endif - -#if defined (__v850e__) -#define CONFIG_USE_PLT_ENTRIES -#define CONFIG_PLT_ENTRY_SIZE 8 -#define CONFIG_USE_SINGLE - -#ifndef EM_CYGNUS_V850 /* grumble */ -#define EM_CYGNUS_V850 0x9080 -#endif - -#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 SYMBOL_PREFIX "_" -#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 -static const int MODUTILS_MODULE_H = 1; - -#ident "$Id: insmod.c,v 1.1.3.1 2004/12/29 07:07:45 honor 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; -#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE - 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 */ -#endif -}; - -#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. */ -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 1.1.3.1 2004/12/29 07:07:45 honor Exp $" - -/* The relocatable object is manipulated using elfin types. */ - -#include <stdio.h> -#include <elf.h> -#include <endian.h> - -#if __BYTE_ORDER == __LITTLE_ENDIAN -#define ELFDATAM ELFDATA2LSB -#elif __BYTE_ORDER == __BIG_ENDIAN -#define ELFDATAM ELFDATA2MSB -#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 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 - -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); - -#ifdef CONFIG_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 int obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, - const char *string); - -#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE -static int obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, - struct obj_symbol *sym); -#endif - -static int 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); - -#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE -static int arch_init_module (struct obj_file *f, struct new_module *); -#endif - -#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 - - -#define _PATH_MODULES "/lib/modules" -static const int STRVERSIONLEN = 32; - -/*======================================================================*/ - -static int flag_force_load = 0; -static int flag_autoclean = 0; -static int flag_verbose = 0; -static int flag_quiet = 0; -static int flag_export = 1; - - -/*======================================================================*/ - -#if defined(CONFIG_USE_LIST) - -struct arch_list_entry -{ - struct arch_list_entry *next; - CONFIG_LIST_ARCHTYPE addend; - int offset; - int inited : 1; -}; - -#endif - -#if defined(CONFIG_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; - Elf32_Addr *addr; - Elf32_Addr value; -}; -#endif - -struct arch_file { - struct obj_file root; -#if defined(CONFIG_USE_PLT_ENTRIES) - struct obj_section *plt; -#endif -#if defined(CONFIG_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(CONFIG_USE_PLT_ENTRIES) -#if defined(CONFIG_USE_PLT_LIST) - struct arch_list_entry *pltent; -#else - struct arch_single_entry pltent; -#endif -#endif -#if defined(CONFIG_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; -extern int delete_module(const char *); - -static char *m_filename; -static char *m_fullName; - - - -/*======================================================================*/ - - -static int check_module_name_match(const char *filename, struct stat *statbuf, - void *userdata) -{ - char *fullname = (char *) userdata; - - if (fullname[0] == '\0') - return (FALSE); - else { - char *tmp, *tmp1 = bb_xstrdup(filename); - tmp = bb_get_last_path_component(tmp1); - if (strcmp(tmp, fullname) == 0) { - free(tmp1); - /* Stop searching if we find a match */ - m_filename = bb_xstrdup(filename); - return (TRUE); - } - free(tmp1); - } - return (FALSE); -} - - -/*======================================================================*/ - -static struct obj_file *arch_new_file(void) -{ - struct arch_file *f; - f = xmalloc(sizeof(*f)); - - memset(f, 0, sizeof(*f)); - - return &f->root; -} - -static struct obj_section *arch_new_section(void) -{ - return xmalloc(sizeof(struct obj_section)); -} - -static struct obj_symbol *arch_new_symbol(void) -{ - struct arch_symbol *sym; - sym = xmalloc(sizeof(*sym)); - - memset(sym, 0, 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) -{ - struct arch_file *ifile = (struct arch_file *) f; - enum obj_reloc ret = obj_reloc_ok; - ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset); - ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset; -#if defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) - struct arch_symbol *isym = (struct arch_symbol *) sym; -#endif -#if defined(CONFIG_USE_GOT_ENTRIES) - ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0; -#endif -#if defined(CONFIG_USE_PLT_ENTRIES) - ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0; - unsigned long *ip; -#if defined(CONFIG_USE_PLT_LIST) - struct arch_list_entry *pe; -#else - struct arch_single_entry *pe; -#endif -#endif - - switch (ELF32_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 */ - - assert(got); - *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 */ - assert(got); - *loc += v - got; - 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. */ - assert(isym != NULL); - pe = (struct arch_single_entry *) &isym->pltent; - assert(pe->allocated); - 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 (ELF32_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 (ELF32_R_TYPE(rel->r_info) == R_390_PLT32) - *(unsigned int *) loc = (unsigned int) v; - else if (ELF32_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: - assert(got != 0); - *(unsigned long *) loc += got - dot; - break; - - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT32: - assert(isym != NULL); - assert(got != 0); - if (!isym->gotent.inited) - { - isym->gotent.inited = 1; - *(Elf32_Addr *)(ifile->got->contents + isym->gotent.offset) = v; - } - if (ELF32_R_TYPE(rel->r_info) == R_390_GOT12) - *(unsigned short *) loc |= (*(unsigned short *) loc + isym->gotent.offset) & 0xfff; - else if (ELF32_R_TYPE(rel->r_info) == R_390_GOT16) - *(unsigned short *) loc += isym->gotent.offset; - else if (ELF32_R_TYPE(rel->r_info) == R_390_GOT32) - *(unsigned int *) loc += isym->gotent.offset; - break; - - case R_390_GOTOFF: - assert(got != 0); - *loc += v - got; - break; - -#elif defined(__i386__) - - case R_386_NONE: - break; - - case R_386_32: - *loc += v; - break; - - case R_386_PLT32: - case R_386_PC32: - *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: - assert(got != 0); - *loc += got - dot; - break; - - case R_386_GOT32: - goto bb_use_got; - - case R_386_GOTOFF: - assert(got != 0); - *loc += v - got; - 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 ((Elf32_Sword)v > 0x7f || - (Elf32_Sword)v < -(Elf32_Sword)0x80) { - ret = obj_reloc_overflow; - } - *(char *)loc = v; - break; - - case R_68K_PC16: - v -= dot; - if ((Elf32_Sword)v > 0x7fff || - (Elf32_Sword)v < -(Elf32_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; - - case R_68K_GOTOFF: - assert(got != 0); - *loc += v - got; - break; - -#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 = (struct mips_hi16 *) 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; - Elf32_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; - - /* The value for the HI16 had best be the same. */ - assert(v == l->value); - - /* 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(__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(__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: - assert(got != 0); - *loc = got - dot + rel->r_addend; - break; - - case R_SH_GOT32: - goto bb_use_got; - - case R_SH_GOTOFF: - assert(got != 0); - *loc = v - got; - break; - -#endif - - default: - printf("Warning: unhandled reloc %d\n",(int)ELF32_R_TYPE(rel->r_info)); - ret = obj_reloc_unhandled; - break; - -#if 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; -#endif - -#if defined(CONFIG_USE_PLT_ENTRIES) - - bb_use_plt: - - /* find the plt entry and initialize it if necessary */ - assert(isym != NULL); - -#if defined(CONFIG_USE_PLT_LIST) - for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;) - pe = pe->next; - assert(pe != NULL); -#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 ((Elf32_Sword)v > 0x1fffff || (Elf32_Sword)v < (Elf32_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 /* CONFIG_USE_PLT_ENTRIES */ - -#if defined(CONFIG_USE_GOT_ENTRIES) - bb_use_got: - - assert(isym != NULL); - /* 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 /* CONFIG_USE_GOT_ENTRIES */ - } - - return ret; -} - - -#if defined(CONFIG_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(CONFIG_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(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) - -static struct obj_section *arch_xsect_init(struct obj_file *f, 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); - assert(myrelsec); - } - - return myrelsec; -} - -#endif - -static void arch_create_got(struct obj_file *f) -{ -#if defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) - struct arch_file *ifile = (struct arch_file *) f; - int i; -#if defined(CONFIG_USE_GOT_ENTRIES) - int got_offset = 0, got_needed = 0, got_allocate; -#endif -#if defined(CONFIG_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[ELF32_R_SYM(rel->r_info)]; - -#if defined(CONFIG_USE_GOT_ENTRIES) - got_allocate = 0; -#endif -#if defined(CONFIG_USE_PLT_ENTRIES) - plt_allocate = 0; -#endif - - switch (ELF32_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; - - case R_68K_GOTOFF: - got_needed = 1; - continue; - -#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(CONFIG_USE_GOT_ENTRIES) - if (got_allocate) { - got_offset += arch_single_init( - rel, &intsym->gotent, - got_offset, CONFIG_GOT_ENTRY_SIZE); - - got_needed = 1; - } -#endif -#if defined(CONFIG_USE_PLT_ENTRIES) - if (plt_allocate) { -#if defined(CONFIG_USE_PLT_LIST) - plt_offset += arch_list_add( - rel, &intsym->pltent, - plt_offset, CONFIG_PLT_ENTRY_SIZE); -#else - plt_offset += arch_single_init( - rel, &intsym->pltent, - plt_offset, CONFIG_PLT_ENTRY_SIZE); -#endif - plt_needed = 1; - } -#endif - } - } - -#if defined(CONFIG_USE_GOT_ENTRIES) - if (got_needed) { - ifile->got = arch_xsect_init(f, ".got", got_offset, - CONFIG_GOT_ENTRY_SIZE); - } -#endif - -#if defined(CONFIG_USE_PLT_ENTRIES) - if (plt_needed) { - ifile->plt = arch_xsect_init(f, ".plt", plt_offset, - CONFIG_PLT_ENTRY_SIZE); - } -#endif - -#endif /* defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) */ -} - -#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE -static int arch_init_module(struct obj_file *f, struct new_module *mod) -{ - return 1; -} -#endif - -/*======================================================================*/ - -/* Standard ELF hash function. */ -static 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; -} - -static unsigned long obj_elf_hash(const char *name) -{ - return obj_elf_hash_n(name, strlen(name)); -} - -#ifdef CONFIG_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 /* CONFIG_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 = 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) - 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 (ELFW(ST_BIND)(info) == STB_LOCAL && symidx != -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(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; -} - -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(); - - 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; -} - -static void *obj_extend_section(struct obj_section *sec, unsigned long more) -{ - unsigned long oldsize = sec->header.sh_size; - if (more) { - 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; -#ifdef SYMBOL_PREFIX - char *name_buf = 0; - size_t name_alloced_size = 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 = (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 && !(ELFW(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, - 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) { - bb_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') { - bb_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 *myloc = 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, myloc - contents, q); - myloc += sizeof(char *); - q = r; - } - - /* last part */ - obj_string_patch(f, sym->secidx, myloc - contents, q); - } - - argc--, argv++; - } - - return 1; -} - -#ifdef CONFIG_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; - 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 /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */ - -#ifdef CONFIG_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) { - if (nks) - bb_perror_msg("get_kernel_syms: %s", m_name); - else - bb_error_msg("No kernel symbols"); - 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; - - /* 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, SPFX "init_module")); - routines.cleanup = - obj_symbol_final_value(f, obj_find_symbol(f, SPFX "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) - bb_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 /* CONFIG_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, *sym_name; - 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) { - bb_error_msg("invalid parameter %s", key); - return 0; - } - -#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("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') { - bb_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))) { - bb_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) { - bb_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: - bb_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) { - bb_error_msg("too many values for %s (max %d)", key, max); - return 0; - } - ++q; - break; - - default: - bb_error_msg("invalid argument syntax for %s", key); - return 0; - } - } - - end_of_arg: - if (n < min) { - bb_error_msg("too few values for %s (min %d)", key, min); - return 0; - } - - argc--, argv++; - } - - return 1; -} - -#ifdef CONFIG_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; - 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 /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */ - - -#ifdef CONFIG_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 && bufsize < ret) { - module_names = xrealloc(module_names, bufsize = ret); - goto retry_modules_load; - } - bb_perror_msg("QM_MODULES"); - return 0; - } - - 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("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: - bb_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 && bufsize < ret) { - syms = xrealloc(syms, bufsize = ret); - goto retry_kern_sym_load; - } - bb_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, SPFX "__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; -} - -#ifdef CONFIG_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; - sec->header.sh_addralign = tgt_sizeof_void_p; /* Empty section might - be byte-aligned */ - 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 /* CONFIG_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_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"); - 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; - } - - 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) - bb_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_add_ksymtab(x, y) -1 -#define new_create_module_ksymtab(x) -#define query_module(v, w, x, y, z) -1 - -#endif /* CONFIG_FEATURE_NEW_MODULE_INTERFACE */ - - -/*======================================================================*/ - -static 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; -} - -#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE -static 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; -} -#endif - -static 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 { - if (!flag_quiet) { - bb_error_msg("unresolved symbol %s", sym->name); - } - ret = 0; - } - } - } - - return ret; -} - -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(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; - } - } -} - -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 = 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) { - bb_error_msg("%s of type %ld for %s", errmsg, - (long) ELFW(R_TYPE) (rel->r_info), - strtab + extsym->st_name); - } else { - bb_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; -} - -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) -{ - 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) { - bb_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) { - bb_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)) { - bb_error_msg("ELF file not for this architecture"); - return NULL; - } - if (f->header.e_type != ET_REL) { - bb_error_msg("ELF file not a relocatable object"); - return NULL; - } - - /* Read the section headers. */ - - if (f->header.e_shentsize != sizeof(ElfW(Shdr))) { - bb_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) { - bb_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; - - 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("error reading ELF section data"); - return NULL; - } - } else { - sec->contents = NULL; - } - break; - -#if SHT_RELM == SHT_REL - case SHT_RELA: - bb_error_msg("RELA relocations not supported on this architecture"); - return NULL; -#else - case SHT_REL: - bb_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; - } - - bb_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]; - - /* .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("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 = xcalloc(j, sizeof(struct obj_symbol *)); - - /* 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 if (sym->st_shndx < shnum) - name = f->sections[sym->st_shndx]->name; - else - continue; - - 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))) { - bb_error_msg("relocation entry size mismatch: %lu != %lu", - (unsigned long) sec->header.sh_entsize, - (unsigned long) sizeof(ElfW(RelM))); - return NULL; - } - 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; -} - -#ifdef CONFIG_FEATURE_INSMOD_LOADINKMEM -/* - * load the unloaded sections directly into the memory allocated by - * kernel for the module + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ -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) { +#include "libbb.h" +#include "modutils.h" - /* 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_error_msg("error reading ELF section data: %s\n", strerror(errno)); - return 0; - } - - } - return 1; -} -#endif - -static void hide_special_symbols(struct obj_file *f) +int insmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int insmod_main(int argc UNUSED_PARAM, char **argv) { - 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) - if ((sym = obj_find_symbol(f, *p)) != NULL) - sym->info = - ELFW(ST_INFO) (STB_LOCAL, ELFW(ST_TYPE) (sym->info)); -} + char *filename; + int rc; -#ifdef CONFIG_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". + /* Compat note: + * 2.6 style insmod has no options and required filename + * (not module name - .ko can't be omitted). + * 2.4 style insmod can take module name without .o + * and performs module search in default directories + * or in $MODPATH. */ - static const char *gpl_licenses[] = { - "GPL", - "GPL v2", - "GPL and additional rights", - "Dual BSD/GPL", - "Dual MPL/GPL", - }; - - if ((sec = obj_find_section(f, ".modinfo"))) { - const char *value, *ptr, *endptr; - ptr = sec->contents; - endptr = ptr + sec->header.sh_size; - while (ptr < endptr) { - if ((value = strchr(ptr, '=')) && strncmp(ptr, "license", value-ptr) == 0) { - int i; - if (license) - *license = value+1; - for (i = 0; i < sizeof(gpl_licenses)/sizeof(gpl_licenses[0]); ++i) { - if (strcmp(value+1, gpl_licenses[i]) == 0) - return(0); - } - return(2); - } - if (strchr(ptr, '\0')) - ptr = strchr(ptr, '\0') + 1; - 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(struct obj_file *f, int fd, char *m_name, - int kernel_has_tainted, int taint, const char *text1, const char *text2) -{ - char buf[80]; - int oldval; - static int first = 1; - 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 (first) { - printf(" See %s for information about tainted modules\n", TAINT_URL); - first = 0; - } - 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[] = TAINT_FILENAME; - int fd, kernel_has_tainted; - const char *ptr; - - kernel_has_tainted = 1; - if ((fd = open(tainted_file, O_RDWR)) < 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(f, 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(f, fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "non-GPL license - ", ptr); - break; - default: - set_tainted(f, fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "Unexpected return from obj_gpl_license", ""); - break; - } - - if (flag_force_load) - set_tainted(f, fd, m_name, 1, TAINT_FORCED_MODULE, "forced load", ""); - - if (fd >= 0) - close(fd); -} -#else /* CONFIG_FEATURE_CHECK_TAINTED_MODULE */ -#define check_tainted_module(x, y) do { } while(0); -#endif /* CONFIG_FEATURE_CHECK_TAINTED_MODULE */ - -#ifdef CONFIG_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. - */ -static int -get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) -{ -#ifdef CONFIG_FEATURE_INSMOD_VERSION_CHECKING - if (get_modinfo_value(f, "kernel_version") == NULL) - return old_get_module_version(f, str); - else - return new_get_module_version(f, str); -#else /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */ - strncpy(str, "???", sizeof(str)); - return -1; -#endif /* CONFIG_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[] = "__insmod_"; - struct obj_section *sec; - struct obj_symbol *sym; - char *name, *absolute_filename; - char str[STRVERSIONLEN], real[PATH_MAX]; - int i, l, lm_name, lfilename, use_ksymtab, version; - struct stat statbuf; - - static const char *section_names[] = { - ".text", - ".rodata", - ".data", - ".bss" - ".sbss" - }; - - if (realpath(filename, real)) { - absolute_filename = bb_xstrdup(real); - } - else { - int save_errno = errno; - bb_error_msg("cannot get realpath for %s", filename); - errno = save_errno; - perror(""); - absolute_filename = bb_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_export; - - if ((sec = obj_find_section(f, ".this"))) { - /* 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, - ELFW(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, ELFW(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 < sizeof(section_names)/sizeof(section_names[0]); ++i) { - if ((sec = obj_find_section(f, section_names[i])) && - 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, ELFW(ST_INFO) (STB_GLOBAL, STT_NOTYPE), - sec->idx, sec->header.sh_addr, 0); - if (use_ksymtab) - new_add_ksymtab(f, sym); - } - } -} -#endif /* CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ - -#ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP -static void print_load_map(struct obj_file *f) -{ - struct obj_symbol *sym; - struct obj_symbol **all, **p; - struct obj_section *sec; - int i, nsyms, *loaded; - /* Report on the section layout. */ + USE_FEATURE_2_4_MODULES( + getopt32(argv, INSMOD_OPTS INSMOD_ARGS); + argv += optind - 1; + ); - 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); - } -#ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP_FULL - /* Quick reference which section indicies are loaded. */ - - loaded = alloca(sizeof(int) * (i = f->header.e_shnum)); - 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 (ELFW(ST_BIND) (sym->info) == STB_LOCAL) - type = tolower(type); - - printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value, - type, sym->name); - } -#endif -} - -#endif - -extern int insmod_main( int argc, char **argv) -{ - int opt; - int k_crcs; - int k_new_syscalls; - int len; - char *tmp, *tmp1; - unsigned long m_size; - ElfW(Addr) m_addr; - struct obj_file *f; - struct stat st; - char *m_name = 0; - int exit_status = EXIT_FAILURE; - int m_has_modinfo; -#ifdef CONFIG_FEATURE_INSMOD_VERSION_CHECKING - struct utsname uts_info; - char m_strversion[STRVERSIONLEN]; - int m_version; - int m_crcs; -#endif -#ifdef CONFIG_FEATURE_CLEAN_UP - FILE *fp = 0; -#else - FILE *fp; -#endif -#ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP - int flag_print_load_map = 0; -#endif - - /* Parse any options */ -#ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP - while ((opt = getopt(argc, argv, "fkqsvxmLo:")) > 0) { -#else - while ((opt = getopt(argc, argv, "fkqsvxLo:")) > 0) { -#endif - switch (opt) { - case 'f': /* force loading */ - flag_force_load = 1; - break; - case 'k': /* module loaded by kerneld, auto-cleanable */ - flag_autoclean = 1; - break; - case 's': /* log to syslog */ - /* log to syslog -- not supported */ - /* but kernel needs this for request_module(), */ - /* as this calls: modprobe -k -s -- <module> */ - /* so silently ignore this flag */ - break; - case 'v': /* verbose output */ - flag_verbose = 1; - break; - case 'q': /* silent */ - flag_quiet = 1; - break; - case 'x': /* do not export externs */ - flag_export = 0; - break; - case 'o': /* name the output module */ - free(m_name); - m_name = bb_xstrdup(optarg); - 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; -#ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP - case 'm': /* print module load map */ - flag_print_load_map = 1; - break; -#endif - default: - bb_show_usage(); - } - } - - if (argv[optind] == NULL) { + filename = *++argv; + if (!filename) bb_show_usage(); - } - - /* Grab the module name */ - tmp1 = bb_xstrdup(argv[optind]); - tmp = basename(tmp1); - len = strlen(tmp); - - if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') { - len-=2; - tmp[len] = '\0'; - } - - bb_xasprintf(&m_fullName, "%s.o", tmp); - - if (!m_name) { - m_name = tmp; - } else { - free(tmp1); - tmp1 = 0; /* flag for free(m_name) before exit() */ - } - - /* Get a filedesc for the module. Check we we have a complete path */ - if (stat(argv[optind], &st) < 0 || !S_ISREG(st.st_mode) || - (fp = fopen(argv[optind], "r")) == NULL) { - struct utsname myuname; - - /* 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 (uname(&myuname) == 0) { - char *module_dir; - char *tmdn; - char real_module_dir[FILENAME_MAX]; - - tmdn = concat_path_file(_PATH_MODULES, 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... */ - if (realpath (tmdn, real_module_dir) == NULL) - module_dir = tmdn; - else - module_dir = real_module_dir; - recursive_action(module_dir, TRUE, FALSE, FALSE, - check_module_name_match, 0, m_fullName); - free(tmdn); - } - - /* Check if we have found anything yet */ - if (m_filename == 0 || ((fp = fopen(m_filename, "r")) == NULL)) - { - char module_dir[FILENAME_MAX]; - - free(m_filename); - m_filename = 0; - if (realpath (_PATH_MODULES, module_dir) == NULL) - strcpy(module_dir, _PATH_MODULES); - /* No module found under /lib/modules/`uname -r`, this - * time cast the net a bit wider. Search /lib/modules/ */ - if (! recursive_action(module_dir, TRUE, FALSE, FALSE, - check_module_name_match, 0, m_fullName)) - { - if (m_filename == 0 - || ((fp = fopen(m_filename, "r")) == NULL)) - { - bb_error_msg("%s: no module by that name found", m_fullName); - goto out; - } - } else - bb_error_msg_and_die("%s: no module by that name found", m_fullName); - } - } else - m_filename = bb_xstrdup(argv[optind]); - - printf("Using %s\n", m_filename); - - if ((f = obj_load(fp, LOADBITS)) == NULL) - bb_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 CONFIG_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); - } else { - m_version = old_get_module_version(f, m_strversion); - if (m_version == -1) { - bb_error_msg("couldn't find the kernel version the module was " - "compiled for"); - goto out; - } - } - - if (strncmp(uts_info.release, m_strversion, STRVERSIONLEN) != 0) { - if (flag_force_load) { - bb_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, uts_info.release); - } else { - bb_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, uts_info.release); - goto out; - } - } - } - k_crcs = 0; -#endif /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */ - - k_new_syscalls = !query_module(NULL, 0, NULL, 0, NULL); - - if (k_new_syscalls) { -#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE - if (!new_get_kernel_symbols()) - goto out; - k_crcs = new_is_kernel_checksummed(); -#else - bb_error_msg("Not configured to support new kernels"); - goto out; -#endif - } else { -#ifdef CONFIG_FEATURE_OLD_MODULE_INTERFACE - if (!old_get_kernel_symbols(m_name)) - goto out; - k_crcs = old_is_kernel_checksummed(); -#else - bb_error_msg("Not configured to support old kernels"); - goto out; -#endif - } - -#ifdef CONFIG_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 /* CONFIG_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); - check_tainted_module(f, m_name); - - /* 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); - -#ifdef CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS - add_ksymoops_symbols(f, m_filename, m_name); -#endif /* CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS */ - - 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: - bb_error_msg("A module named %s already exists", m_name); - goto out; - case ENOMEM: - bb_error_msg("Can't allocate kernel memory for module; needed %lu bytes", - m_size); - goto out; - default: - bb_perror_msg("create_module: %s", m_name); - goto out; - } - -#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); - goto out; - } -#endif - - 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; - } - -#ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP - if(flag_print_load_map) - print_load_map(f); -#endif - exit_status = EXIT_SUCCESS; + rc = bb_init_module(filename, parse_cmdline_module_options(argv)); + if (rc) + bb_error_msg("can't insert '%s': %s", filename, moderror(rc)); -out: -#ifdef CONFIG_FEATURE_CLEAN_UP - if(fp) - fclose(fp); - if(tmp1) { - free(tmp1); - } else { - free(m_name); - } - free(m_filename); -#endif - return(exit_status); + return rc; } |