/*
* Mini insmod implementation for busybox
*
- * This version of insmod supports ARM, CRIS, H8/300, x86, ia64, x86_64,
- * m68k, MIPS, PowerPC, S390, SH3/4/5, Sparc, v850e, and x86_64.
+ * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
*
- * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
- * and Ron Alder <alder@lineo.com>
- *
- * Rodney Radford <rradford@mindspring.com> 17-Aug-2004.
- * Added x86_64 support.
- *
- * Miles Bader <miles@gnu.org> added NEC V850E support.
- *
- * Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4
- * and (theoretically) SH3. I have only tested SH4 in little endian mode.
- *
- * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
- * Nicolas Ferre <nicolas.ferre@alcove.fr> to support ARM7TDMI. Only
- * very minor changes required to also work with StrongArm and presumably
- * all ARM based systems.
- *
- * Yoshinori Sato <ysato@users.sourceforge.jp> 19-May-2004.
- * added Renesas H8/300 support.
- *
- * Paul Mundt <lethal@linux-sh.org> 08-Aug-2003.
- * Integrated support for sh64 (SH-5), from preliminary modutils
- * patches from Benedict Gaster <benedict.gaster@superh.com>.
- * Currently limited to support for 32bit ABI.
- *
- * Magnus Damm <damm@opensource.se> 22-May-2002.
- * The plt and got code are now using the same structs.
- * Added generic linked list code to fully support PowerPC.
- * Replaced the mess in arch_apply_relocation() with architecture blocks.
- * The arch_create_got() function got cleaned up with architecture blocks.
- * These blocks should be easy maintain and sync with obj_xxx.c in modutils.
- *
- * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001.
- * PowerPC specific code stolen from modutils-2.3.16,
- * written by Paul Mackerras, Copyright 1996, 1997 Linux International.
- * I've only tested the code on mpc8xx platforms in big-endian mode.
- * Did some cleanup and added USE_xxx_ENTRIES...
- *
- * Quinn Jensen <jensenq@lineo.com> added MIPS support 23-Feb-2001.
- * based on modutils-2.4.2
- * MIPS specific support for Elf loading and relocation.
- * Copyright 1996, 1997 Linux International.
- * Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu>
- *
- * Based almost entirely on the Linux modutils-2.3.11 implementation.
- * Copyright 1996, 1997 Linux International.
- * New implementation contributed by Richard Henderson <rth@tamu.edu>
- * Based on original work by Bjorn Ekwall <bj0rn@blox.se>
- * Restructured (and partly rewritten) by:
- * Björn Ekwall <bj0rn@blox.se> February 1999
- *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- */
-
-#include "libbb.h"
-#include <libgen.h>
-#include <sys/utsname.h>
-
-#if !ENABLE_FEATURE_2_4_MODULES && !ENABLE_FEATURE_2_6_MODULES
-#undef ENABLE_FEATURE_2_4_MODULES
-#define ENABLE_FEATURE_2_4_MODULES 1
-#endif
-
-#if !ENABLE_FEATURE_2_4_MODULES
-#define insmod_ng_main insmod_main
-#endif
-
-#if ENABLE_FEATURE_2_6_MODULES
-extern int insmod_ng_main( int argc, char **argv);
-#endif
-
-
-#if ENABLE_FEATURE_2_4_MODULES
-
-
-#if ENABLE_FEATURE_INSMOD_LOADINKMEM
-#define LOADBITS 0
-#else
-#define LOADBITS 1
-#endif
-
-
-/* Alpha */
-#if defined(__alpha__)
-#define MATCH_MACHINE(x) (x == EM_ALPHA)
-#define SHT_RELM SHT_RELA
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#endif
-
-/* ARM support */
-#if defined(__arm__)
-#define MATCH_MACHINE(x) (x == EM_ARM)
-#define SHT_RELM SHT_REL
-#define Elf32_RelM Elf32_Rel
-#define ELFCLASSM ELFCLASS32
-#define USE_PLT_ENTRIES
-#define PLT_ENTRY_SIZE 8
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 8
-#define USE_SINGLE
-#endif
-
-/* blackfin */
-#if defined(BFIN)
-#define MATCH_MACHINE(x) (x == EM_BLACKFIN)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-
-/* CRIS */
-#if defined(__cris__)
-#define MATCH_MACHINE(x) (x == EM_CRIS)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#ifndef EM_CRIS
-#define EM_CRIS 76
-#define R_CRIS_NONE 0
-#define R_CRIS_32 3
-#endif
-#endif
-
-/* H8/300 */
-#if defined(__H8300H__) || defined(__H8300S__)
-#define MATCH_MACHINE(x) (x == EM_H8_300)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_SINGLE
-#define SYMBOL_PREFIX "_"
-#endif
-
-/* PA-RISC / HP-PA */
-#if defined(__hppa__)
-#define MATCH_MACHINE(x) (x == EM_PARISC)
-#define SHT_RELM SHT_RELA
-#if defined(__LP64__)
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#else
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-#endif
-
-/* x86 */
-#if defined(__i386__)
-#ifndef EM_486
-#define MATCH_MACHINE(x) (x == EM_386)
-#else
-#define MATCH_MACHINE(x) (x == EM_386 || x == EM_486)
-#endif
-#define SHT_RELM SHT_REL
-#define Elf32_RelM Elf32_Rel
-#define ELFCLASSM ELFCLASS32
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 4
-#define USE_SINGLE
-#endif
-
-/* IA64, aka Itanium */
-#if defined(__ia64__)
-#define MATCH_MACHINE(x) (x == EM_IA_64)
-#define SHT_RELM SHT_RELA
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#endif
-
-/* m68k */
-#if defined(__mc68000__)
-#define MATCH_MACHINE(x) (x == EM_68K)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 4
-#define USE_SINGLE
-#endif
-
-/* Microblaze */
-#if defined(__microblaze__)
-#define USE_SINGLE
-#define MATCH_MACHINE(x) (x == EM_XILINX_MICROBLAZE)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-
-/* MIPS */
-#if defined(__mips__)
-#define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE)
-#define SHT_RELM SHT_REL
-#define Elf32_RelM Elf32_Rel
-#define ELFCLASSM ELFCLASS32
-/* Account for ELF spec changes. */
-#ifndef EM_MIPS_RS3_LE
-#ifdef EM_MIPS_RS4_BE
-#define EM_MIPS_RS3_LE EM_MIPS_RS4_BE
-#else
-#define EM_MIPS_RS3_LE 10
-#endif
-#endif /* !EM_MIPS_RS3_LE */
-#define ARCHDATAM "__dbe_table"
-#endif
-
-/* Nios II */
-#if defined(__nios2__)
-#define MATCH_MACHINE(x) (x == EM_ALTERA_NIOS2)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-
-/* PowerPC */
-#if defined(__powerpc64__)
-#define MATCH_MACHINE(x) (x == EM_PPC64)
-#define SHT_RELM SHT_RELA
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#elif defined(__powerpc__)
-#define MATCH_MACHINE(x) (x == EM_PPC)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_PLT_ENTRIES
-#define PLT_ENTRY_SIZE 16
-#define USE_PLT_LIST
-#define LIST_ARCHTYPE ElfW(Addr)
-#define USE_LIST
-#define ARCHDATAM "__ftr_fixup"
-#endif
-
-/* S390 */
-#if defined(__s390__)
-#define MATCH_MACHINE(x) (x == EM_S390)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_PLT_ENTRIES
-#define PLT_ENTRY_SIZE 8
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 8
-#define USE_SINGLE
-#endif
-
-/* SuperH */
-#if defined(__sh__)
-#define MATCH_MACHINE(x) (x == EM_SH)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 4
-#define USE_SINGLE
-/* the SH changes have only been tested in =little endian= mode */
-/* I'm not sure about big endian, so let's warn: */
-#if defined(__sh__) && BB_BIG_ENDIAN
-# error insmod.c may require changes for use on big endian SH
-#endif
-/* it may or may not work on the SH1/SH2... Error on those also */
-#if ((!(defined(__SH3__) || defined(__SH4__) || defined(__SH5__)))) && (defined(__sh__))
-#error insmod.c may require changes for SH1 or SH2 use
-#endif
-#endif
-
-/* Sparc */
-#if defined(__sparc__)
-#define MATCH_MACHINE(x) (x == EM_SPARC)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#endif
-
-/* v850e */
-#if defined(__v850e__)
-#define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850)
-#define SHT_RELM SHT_RELA
-#define Elf32_RelM Elf32_Rela
-#define ELFCLASSM ELFCLASS32
-#define USE_PLT_ENTRIES
-#define PLT_ENTRY_SIZE 8
-#define USE_SINGLE
-#ifndef EM_CYGNUS_V850 /* grumble */
-#define EM_CYGNUS_V850 0x9080
-#endif
-#define SYMBOL_PREFIX "_"
-#endif
-
-/* X86_64 */
-#if defined(__x86_64__)
-#define MATCH_MACHINE(x) (x == EM_X86_64)
-#define SHT_RELM SHT_RELA
-#define USE_GOT_ENTRIES
-#define GOT_ENTRY_SIZE 8
-#define USE_SINGLE
-#define Elf64_RelM Elf64_Rela
-#define ELFCLASSM ELFCLASS64
-#endif
-
-#ifndef SHT_RELM
-#error Sorry, but insmod.c does not yet support this architecture...
-#endif
-
-
-//----------------------------------------------------------------------------
-//--------modutils module.h, lines 45-242
-//----------------------------------------------------------------------------
-
-/* Definitions for the Linux module syscall interface.
- Copyright 1996, 1997 Linux International.
-
- Contributed by Richard Henderson <rth@tamu.edu>
-
- This file is part of the Linux modutils.
-
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2 of the License, or (at your
- option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-
-#ifndef MODUTILS_MODULE_H
-
-/*======================================================================*/
-/* For sizeof() which are related to the module platform and not to the
- environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */
-
-#define tgt_sizeof_char sizeof(char)
-#define tgt_sizeof_short sizeof(short)
-#define tgt_sizeof_int sizeof(int)
-#define tgt_sizeof_long sizeof(long)
-#define tgt_sizeof_char_p sizeof(char *)
-#define tgt_sizeof_void_p sizeof(void *)
-#define tgt_long long
-
-#if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64)
-#undef tgt_sizeof_long
-#undef tgt_sizeof_char_p
-#undef tgt_sizeof_void_p
-#undef tgt_long
-enum {
- tgt_sizeof_long = 8,
- tgt_sizeof_char_p = 8,
- tgt_sizeof_void_p = 8
-};
-#define tgt_long long long
-#endif
-
-/*======================================================================*/
-/* The structures used in Linux 2.1. */
-
-/* Note: new_module_symbol does not use tgt_long intentionally */
-struct new_module_symbol {
- unsigned long value;
- unsigned long name;
-};
-
-struct new_module_persist;
-
-struct new_module_ref {
- unsigned tgt_long dep; /* kernel addresses */
- unsigned tgt_long ref;
- unsigned tgt_long next_ref;
-};
-
-struct new_module {
- unsigned tgt_long size_of_struct; /* == sizeof(module) */
- unsigned tgt_long next;
- unsigned tgt_long name;
- unsigned tgt_long size;
-
- tgt_long usecount;
- unsigned tgt_long flags; /* AUTOCLEAN et al */
-
- unsigned nsyms;
- unsigned ndeps;
-
- unsigned tgt_long syms;
- unsigned tgt_long deps;
- unsigned tgt_long refs;
- unsigned tgt_long init;
- unsigned tgt_long cleanup;
- unsigned tgt_long ex_table_start;
- unsigned tgt_long ex_table_end;
-#ifdef __alpha__
- unsigned tgt_long gp;
-#endif
- /* Everything after here is extension. */
- unsigned tgt_long persist_start;
- unsigned tgt_long persist_end;
- unsigned tgt_long can_unload;
- unsigned tgt_long runsize;
- const char *kallsyms_start; /* All symbols for kernel debugging */
- const char *kallsyms_end;
- const char *archdata_start; /* arch specific data for module */
- const char *archdata_end;
- const char *kernel_data; /* Reserved for kernel internal use */
-};
-
-#ifdef ARCHDATAM
-#define ARCHDATA_SEC_NAME ARCHDATAM
-#else
-#define ARCHDATA_SEC_NAME "__archdata"
-#endif
-#define KALLSYMS_SEC_NAME "__kallsyms"
-
-
-struct new_module_info {
- unsigned long addr;
- unsigned long size;
- unsigned long flags;
- long usecount;
-};
-
-/* Bits of module.flags. */
-enum {
- NEW_MOD_RUNNING = 1,
- NEW_MOD_DELETED = 2,
- NEW_MOD_AUTOCLEAN = 4,
- NEW_MOD_VISITED = 8,
- NEW_MOD_USED_ONCE = 16
-};
-
-int init_module(const char *name, const struct new_module *);
-int query_module(const char *name, int which, void *buf,
- size_t bufsize, size_t *ret);
-
-/* Values for query_module's which. */
-enum {
- QM_MODULES = 1,
- QM_DEPS = 2,
- QM_REFS = 3,
- QM_SYMBOLS = 4,
- QM_INFO = 5
-};
-
-/*======================================================================*/
-/* The system calls unchanged between 2.0 and 2.1. */
-
-unsigned long create_module(const char *, size_t);
-int delete_module(const char *);
-
-
-#endif /* module.h */
-
-//----------------------------------------------------------------------------
-//--------end of modutils module.h
-//----------------------------------------------------------------------------
-
-
-
-//----------------------------------------------------------------------------
-//--------modutils obj.h, lines 253-462
-//----------------------------------------------------------------------------
-
-/* Elf object file loading and relocation routines.
- Copyright 1996, 1997 Linux International.
-
- Contributed by Richard Henderson <rth@tamu.edu>
-
- This file is part of the Linux modutils.
-
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2 of the License, or (at your
- option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-
-#ifndef MODUTILS_OBJ_H
-
-/* The relocatable object is manipulated using elfin types. */
-
-#include <elf.h>
-#include <endian.h>
-
-#ifndef ElfW
-# if ELFCLASSM == ELFCLASS32
-# define ElfW(x) Elf32_ ## x
-# define ELFW(x) ELF32_ ## x
-# else
-# define ElfW(x) Elf64_ ## x
-# define ELFW(x) ELF64_ ## x
-# endif
-#endif
-
-/* For some reason this is missing from some ancient C libraries.... */
-#ifndef ELF32_ST_INFO
-# define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
-#endif
-
-#ifndef ELF64_ST_INFO
-# define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
-#endif
-
-#define ELF_ST_BIND(info) ELFW(ST_BIND)(info)
-#define ELF_ST_TYPE(info) ELFW(ST_TYPE)(info)
-#define ELF_ST_INFO(bind, type) ELFW(ST_INFO)(bind, type)
-#define ELF_R_TYPE(val) ELFW(R_TYPE)(val)
-#define ELF_R_SYM(val) ELFW(R_SYM)(val)
-
-struct obj_string_patch;
-struct obj_symbol_patch;
-
-struct obj_section
-{
- ElfW(Shdr) header;
- const char *name;
- char *contents;
- struct obj_section *load_next;
- int idx;
-};
-
-struct obj_symbol
-{
- struct obj_symbol *next; /* hash table link */
- const char *name;
- unsigned long value;
- unsigned long size;
- int secidx; /* the defining section index/module */
- int info;
- int ksymidx; /* for export to the kernel symtab */
- int referenced; /* actually used in the link */
-};
-
-/* Hardcode the hash table size. We shouldn't be needing so many
- symbols that we begin to degrade performance, and we get a big win
- by giving the compiler a constant divisor. */
-
-#define HASH_BUCKETS 521
-
-struct obj_file {
- ElfW(Ehdr) header;
- ElfW(Addr) baseaddr;
- struct obj_section **sections;
- struct obj_section *load_order;
- struct obj_section **load_order_search_start;
- struct obj_string_patch *string_patches;
- struct obj_symbol_patch *symbol_patches;
- int (*symbol_cmp)(const char *, const char *);
- unsigned long (*symbol_hash)(const char *);
- unsigned long local_symtab_size;
- struct obj_symbol **local_symtab;
- struct obj_symbol *symtab[HASH_BUCKETS];
-};
-
-enum obj_reloc {
- obj_reloc_ok,
- obj_reloc_overflow,
- obj_reloc_dangerous,
- obj_reloc_unhandled
-};
-
-struct obj_string_patch {
- struct obj_string_patch *next;
- int reloc_secidx;
- ElfW(Addr) reloc_offset;
- ElfW(Addr) string_offset;
-};
-
-struct obj_symbol_patch {
- struct obj_symbol_patch *next;
- int reloc_secidx;
- ElfW(Addr) reloc_offset;
- struct obj_symbol *sym;
-};
-
-
-/* Generic object manipulation routines. */
-
-static unsigned long obj_elf_hash(const char *);
-
-static unsigned long obj_elf_hash_n(const char *, unsigned long len);
-
-static struct obj_symbol *obj_find_symbol(struct obj_file *f,
- const char *name);
-
-static ElfW(Addr) obj_symbol_final_value(struct obj_file *f,
- struct obj_symbol *sym);
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
-static void obj_set_symbol_compare(struct obj_file *f,
- int (*cmp)(const char *, const char *),
- unsigned long (*hash)(const char *));
-#endif
-
-static struct obj_section *obj_find_section(struct obj_file *f,
- const char *name);
-
-static void obj_insert_section_load_order(struct obj_file *f,
- struct obj_section *sec);
-
-static struct obj_section *obj_create_alloced_section(struct obj_file *f,
- const char *name,
- unsigned long align,
- unsigned long size);
-
-static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
- const char *name,
- unsigned long align,
- unsigned long size);
-
-static void *obj_extend_section(struct obj_section *sec, unsigned long more);
-
-static int obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
- const char *string);
-
-static int obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
- struct obj_symbol *sym);
-
-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);
-#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
-static int obj_gpl_license(struct obj_file *f, const char **license);
-#endif /* FEATURE_CHECK_TAINTED_MODULE */
-#endif /* obj.h */
-//----------------------------------------------------------------------------
-//--------end of modutils obj.h
-//----------------------------------------------------------------------------
-
-
-/* SPFX is always a string, so it can be concatenated to string constants. */
-#ifdef SYMBOL_PREFIX
-#define SPFX SYMBOL_PREFIX
-#else
-#define SPFX ""
-#endif
-
-
-#define _PATH_MODULES "/lib/modules"
-enum { STRVERSIONLEN = 64 };
-
-/*======================================================================*/
-
-#define OPTION_STR "sLo:fkvqx" USE_FEATURE_INSMOD_LOAD_MAP("m")
-enum {
- OPT_s = 0x1, // -s /* log to syslog */
- /* Not supported but kernel needs this for request_module(),
- as this calls: modprobe -k -s -- <module>
- so silently ignore this flag */
- OPT_L = 0x2, // -L /* Stub warning */
- /* Compatibility with modprobe.
- In theory, this does locking, but we don't do
- that. So be careful and plan your life around not
- loading the same module 50 times concurrently. */
- OPT_o = 0x4, // -o /* name the output module */
- OPT_f = 0x8, // -f /* force loading */
- OPT_k = 0x10, // -k /* module loaded by kerneld, auto-cleanable */
- OPT_v = 0x20, // -v /* verbose output */
- OPT_q = 0x40, // -q /* silent */
- OPT_x = 0x80, // -x /* do not export externs */
- OPT_m = 0x100, // -m /* print module load map */
-};
-#define flag_force_load (option_mask32 & OPT_f)
-#define flag_autoclean (option_mask32 & OPT_k)
-#define flag_verbose (option_mask32 & OPT_v)
-#define flag_quiet (option_mask32 & OPT_q)
-#define flag_noexport (option_mask32 & OPT_x)
-#if ENABLE_FEATURE_INSMOD_LOAD_MAP
-#define flag_print_load_map (option_mask32 & OPT_m)
-#else
-#define flag_print_load_map 0
-#endif
-
-/*======================================================================*/
-
-#if defined(USE_LIST)
-
-struct arch_list_entry
-{
- struct arch_list_entry *next;
- LIST_ARCHTYPE addend;
- int offset;
- int inited : 1;
-};
-
-#endif
-
-#if defined(USE_SINGLE)
-
-struct arch_single_entry
-{
- int offset;
- int inited : 1;
- int allocated : 1;
-};
-
-#endif
-
-#if defined(__mips__)
-struct mips_hi16
-{
- struct mips_hi16 *next;
- ElfW(Addr) *addr;
- ElfW(Addr) value;
-};
-#endif
-
-struct arch_file {
- struct obj_file root;
-#if defined(USE_PLT_ENTRIES)
- struct obj_section *plt;
-#endif
-#if defined(USE_GOT_ENTRIES)
- struct obj_section *got;
-#endif
-#if defined(__mips__)
- struct mips_hi16 *mips_hi16_list;
-#endif
-};
-
-struct arch_symbol {
- struct obj_symbol root;
-#if defined(USE_PLT_ENTRIES)
-#if defined(USE_PLT_LIST)
- struct arch_list_entry *pltent;
-#else
- struct arch_single_entry pltent;
-#endif
-#endif
-#if defined(USE_GOT_ENTRIES)
- struct arch_single_entry gotent;
-#endif
-};
-
-
-struct external_module {
- const char *name;
- ElfW(Addr) addr;
- int used;
- size_t nsyms;
- struct new_module_symbol *syms;
-};
-
-static struct new_module_symbol *ksyms;
-static size_t nksyms;
-
-static struct external_module *ext_modules;
-static int n_ext_modules;
-static int n_ext_modules_used;
-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, int depth)
-{
- char *fullname = (char *) userdata;
-
- if (fullname[0] == '\0')
- return FALSE;
- else {
- char *tmp, *tmp1 = xstrdup(filename);
- tmp = bb_get_last_path_component_nostrip(tmp1);
- if (strcmp(tmp, fullname) == 0) {
- free(tmp1);
- /* Stop searching if we find a match */
- m_filename = xstrdup(filename);
- return FALSE;
- }
- free(tmp1);
- }
- return TRUE;
-}
-
-
-/*======================================================================*/
-
-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(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
- struct arch_symbol *isym = (struct arch_symbol *) sym;
-#endif
-#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) || defined(__sh__) || defined(__s390__)
-#if defined(USE_GOT_ENTRIES)
- ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0;
-#endif
-#endif
-#if defined(USE_PLT_ENTRIES)
- ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
- unsigned long *ip;
-# if defined(USE_PLT_LIST)
- struct arch_list_entry *pe;
-# else
- struct arch_single_entry *pe;
-# endif
-#endif
-
- switch (ELF_R_TYPE(rel->r_info)) {
-
-#if defined(__arm__)
-
- case R_ARM_NONE:
- break;
-
- case R_ARM_ABS32:
- *loc += v;
- break;
-
- case R_ARM_GOT32:
- goto bb_use_got;
-
- case R_ARM_GOTPC:
- /* relative reloc, always to _GLOBAL_OFFSET_TABLE_
- * (which is .got) similar to branch,
- * but is full 32 bits relative */
-
- *loc += got - dot;
- break;
-
- case R_ARM_PC24:
- case R_ARM_PLT32:
- goto bb_use_plt;
-
- case R_ARM_GOTOFF: /* address relative to the got */
- *loc += v - got;
- break;
-
-#elif defined(__cris__)
-
- case R_CRIS_NONE:
- break;
-
- case R_CRIS_32:
- /* CRIS keeps the relocation value in the r_addend field and
- * should not use whats in *loc at all
- */
- *loc = v;
- break;
-
-#elif defined(__H8300H__) || defined(__H8300S__)
-
- case R_H8_DIR24R8:
- loc = (ElfW(Addr) *)((ElfW(Addr))loc - 1);
- *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v);
- break;
- case R_H8_DIR24A8:
- *loc += v;
- break;
- case R_H8_DIR32:
- case R_H8_DIR32A16:
- *loc += v;
- break;
- case R_H8_PCREL16:
- v -= dot + 2;
- if ((ElfW(Sword))v > 0x7fff ||
- (ElfW(Sword))v < -(ElfW(Sword))0x8000)
- ret = obj_reloc_overflow;
- else
- *(unsigned short *)loc = v;
- break;
- case R_H8_PCREL8:
- v -= dot + 1;
- if ((ElfW(Sword))v > 0x7f ||
- (ElfW(Sword))v < -(ElfW(Sword))0x80)
- ret = obj_reloc_overflow;
- else
- *(unsigned char *)loc = v;
- break;
-
-#elif defined(__i386__)
-
- case R_386_NONE:
- break;
-
- case R_386_32:
- *loc += v;
- break;
-
- case R_386_PLT32:
- case R_386_PC32:
- *loc += v - dot;
- break;
-
- case R_386_GLOB_DAT:
- case R_386_JMP_SLOT:
- *loc = v;
- break;
-
- case R_386_RELATIVE:
- *loc += f->baseaddr;
- break;
-
- case R_386_GOTPC:
- *loc += got - dot;
- break;
-
- case R_386_GOT32:
- goto bb_use_got;
-
- case R_386_GOTOFF:
- *loc += v - got;
- break;
-
-#elif defined(__microblaze__)
- case R_MICROBLAZE_NONE:
- case R_MICROBLAZE_64_NONE:
- case R_MICROBLAZE_32_SYM_OP_SYM:
- case R_MICROBLAZE_32_PCREL:
- break;
-
- case R_MICROBLAZE_64_PCREL: {
- /* dot is the address of the current instruction.
- * v is the target symbol address.
- * So we need to extract the offset in the code,
- * adding v, then subtrating the current address
- * of this instruction.
- * Ex: "IMM 0xFFFE bralid 0x0000" = "bralid 0xFFFE0000"
- */
-
- /* Get split offset stored in code */
- unsigned int temp = (loc[0] & 0xFFFF) << 16 |
- (loc[1] & 0xFFFF);
-
- /* Adjust relative offset. -4 adjustment required
- * because dot points to the IMM insn, but branch
- * is computed relative to the branch instruction itself.
- */
- temp += v - dot - 4;
-
- /* Store back into code */
- loc[0] = (loc[0] & 0xFFFF0000) | temp >> 16;
- loc[1] = (loc[1] & 0xFFFF0000) | (temp & 0xFFFF);
-
- break;
- }
-
- case R_MICROBLAZE_32:
- *loc += v;
- break;
-
- case R_MICROBLAZE_64: {
- /* Get split pointer stored in code */
- unsigned int temp1 = (loc[0] & 0xFFFF) << 16 |
- (loc[1] & 0xFFFF);
-
- /* Add reloc offset */
- temp1+=v;
-
- /* Store back into code */
- loc[0] = (loc[0] & 0xFFFF0000) | temp1 >> 16;
- loc[1] = (loc[1] & 0xFFFF0000) | (temp1 & 0xFFFF);
-
- break;
- }
-
- case R_MICROBLAZE_32_PCREL_LO:
- case R_MICROBLAZE_32_LO:
- case R_MICROBLAZE_SRO32:
- case R_MICROBLAZE_SRW32:
- ret = obj_reloc_unhandled;
- break;
-
-#elif defined(__mc68000__)
-
- case R_68K_NONE:
- break;
-
- case R_68K_32:
- *loc += v;
- break;
-
- case R_68K_8:
- if (v > 0xff) {
- ret = obj_reloc_overflow;
- }
- *(char *)loc = v;
- break;
-
- case R_68K_16:
- if (v > 0xffff) {
- ret = obj_reloc_overflow;
- }
- *(short *)loc = v;
- break;
-
- case R_68K_PC8:
- v -= dot;
- if ((ElfW(Sword))v > 0x7f ||
- (ElfW(Sword))v < -(ElfW(Sword))0x80) {
- ret = obj_reloc_overflow;
- }
- *(char *)loc = v;
- break;
-
- case R_68K_PC16:
- v -= dot;
- if ((ElfW(Sword))v > 0x7fff ||
- (ElfW(Sword))v < -(ElfW(Sword))0x8000) {
- ret = obj_reloc_overflow;
- }
- *(short *)loc = v;
- break;
-
- case R_68K_PC32:
- *(int *)loc = v - dot;
- break;
-
- case R_68K_GLOB_DAT:
- case R_68K_JMP_SLOT:
- *loc = v;
- break;
-
- case R_68K_RELATIVE:
- *(int *)loc += f->baseaddr;
- break;
-
- case R_68K_GOT32:
- goto bb_use_got;
-
-# ifdef R_68K_GOTOFF
- case R_68K_GOTOFF:
- *loc += v - got;
- break;
-# endif
-
-#elif defined(__mips__)
-
- case R_MIPS_NONE:
- break;
-
- case R_MIPS_32:
- *loc += v;
- break;
-
- case R_MIPS_26:
- if (v % 4)
- ret = obj_reloc_dangerous;
- if ((v & 0xf0000000) != ((dot + 4) & 0xf0000000))
- ret = obj_reloc_overflow;
- *loc =
- (*loc & ~0x03ffffff) | ((*loc + (v >> 2)) &
- 0x03ffffff);
- break;
-
- case R_MIPS_HI16:
- {
- struct mips_hi16 *n;
-
- /* We cannot relocate this one now because we don't know the value
- of the carry we need to add. Save the information, and let LO16
- do the actual relocation. */
- n = xmalloc(sizeof *n);
- n->addr = loc;
- n->value = v;
- n->next = ifile->mips_hi16_list;
- ifile->mips_hi16_list = n;
- break;
- }
-
- case R_MIPS_LO16:
- {
- unsigned long insnlo = *loc;
- ElfW(Addr) val, vallo;
-
- /* Sign extend the addend we extract from the lo insn. */
- vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000;
-
- if (ifile->mips_hi16_list != NULL) {
- struct mips_hi16 *l;
-
- l = ifile->mips_hi16_list;
- while (l != NULL) {
- struct mips_hi16 *next;
- unsigned long insn;
-
- /* Do the HI16 relocation. Note that we actually don't
- need to know anything about the LO16 itself, except where
- to find the low 16 bits of the addend needed by the LO16. */
- insn = *l->addr;
- val =
- ((insn & 0xffff) << 16) +
- vallo;
- val += v;
-
- /* Account for the sign extension that will happen in the
- low bits. */
- val =
- ((val >> 16) +
- ((val & 0x8000) !=
- 0)) & 0xffff;
-
- insn = (insn & ~0xffff) | val;
- *l->addr = insn;
-
- next = l->next;
- free(l);
- l = next;
- }
-
- ifile->mips_hi16_list = NULL;
- }
-
- /* Ok, we're done with the HI16 relocs. Now deal with the LO16. */
- val = v + vallo;
- insnlo = (insnlo & ~0xffff) | (val & 0xffff);
- *loc = insnlo;
- break;
- }
-
-#elif defined(__nios2__)
-
- case R_NIOS2_NONE:
- break;
-
- case R_NIOS2_BFD_RELOC_32:
- *loc += v;
- break;
-
- case R_NIOS2_BFD_RELOC_16:
- if (v > 0xffff) {
- ret = obj_reloc_overflow;
- }
- *(short *)loc = v;
- break;
-
- case R_NIOS2_BFD_RELOC_8:
- if (v > 0xff) {
- ret = obj_reloc_overflow;
- }
- *(char *)loc = v;
- break;
-
- case R_NIOS2_S16:
- {
- Elf32_Addr word;
-
- if ((Elf32_Sword)v > 0x7fff ||
- (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
- (word & 0x3f);
- }
- break;
-
- case R_NIOS2_U16:
- {
- Elf32_Addr word;
-
- if (v > 0xffff) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
- (word & 0x3f);
- }
- break;
-
- case R_NIOS2_PCREL16:
- {
- Elf32_Addr word;
-
- v -= dot + 4;
- if ((Elf32_Sword)v > 0x7fff ||
- (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
- }
- break;
-
- case R_NIOS2_GPREL:
- {
- Elf32_Addr word, gp;
- /* get _gp */
- gp = obj_symbol_final_value(f, obj_find_symbol(f, SPFX "_gp"));
- v-=gp;
- if ((Elf32_Sword)v > 0x7fff ||
- (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
- }
- break;
-
- case R_NIOS2_CALL26:
- if (v & 3)
- ret = obj_reloc_dangerous;
- if ((v >> 28) != (dot >> 28))
- ret = obj_reloc_overflow;
- *loc = (*loc & 0x3f) | ((v >> 2) << 6);
- break;
-
- case R_NIOS2_IMM5:
- {
- Elf32_Addr word;
-
- if (v > 0x1f) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc & ~0x7c0;
- *loc = word | ((v & 0x1f) << 6);
- }
- break;
-
- case R_NIOS2_IMM6:
- {
- Elf32_Addr word;
-
- if (v > 0x3f) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc & ~0xfc0;
- *loc = word | ((v & 0x3f) << 6);
- }
- break;
-
- case R_NIOS2_IMM8:
- {
- Elf32_Addr word;
-
- if (v > 0xff) {
- ret = obj_reloc_overflow;
- }
-
- word = *loc & ~0x3fc0;
- *loc = word | ((v & 0xff) << 6);
- }
- break;
-
- case R_NIOS2_HI16:
- {
- Elf32_Addr word;
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | ((v >>16) & 0xffff)) << 6) |
- (word & 0x3f);
- }
- break;
-
- case R_NIOS2_LO16:
- {
- Elf32_Addr word;
-
- word = *loc;
- *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
- (word & 0x3f);
- }
- break;
-
- case R_NIOS2_HIADJ16:
- {
- Elf32_Addr word1, word2;
-
- word1 = *loc;
- word2 = ((v >> 16) + ((v >> 15) & 1)) & 0xffff;
- *loc = ((((word1 >> 22) << 16) | word2) << 6) |
- (word1 & 0x3f);
- }
- break;
-
-#elif defined(__powerpc64__)
- /* PPC64 needs a 2.6 kernel, 2.4 module relocation irrelevant */
-
-#elif defined(__powerpc__)
-
- case R_PPC_ADDR16_HA:
- *(unsigned short *)loc = (v + 0x8000) >> 16;
- break;
-
- case R_PPC_ADDR16_HI:
- *(unsigned short *)loc = v >> 16;
- break;
-
- case R_PPC_ADDR16_LO:
- *(unsigned short *)loc = v;
- break;
-
- case R_PPC_REL24:
- goto bb_use_plt;
-
- case R_PPC_REL32:
- *loc = v - dot;
- break;
-
- case R_PPC_ADDR32:
- *loc = v;
- break;
-
-#elif defined(__s390__)
-
- case R_390_32:
- *(unsigned int *) loc += v;
- break;
- case R_390_16:
- *(unsigned short *) loc += v;
- break;
- case R_390_8:
- *(unsigned char *) loc += v;
- break;
-
- case R_390_PC32:
- *(unsigned int *) loc += v - dot;
- break;
- case R_390_PC16DBL:
- *(unsigned short *) loc += (v - dot) >> 1;
- break;
- case R_390_PC16:
- *(unsigned short *) loc += v - dot;
- break;
-
- case R_390_PLT32:
- case R_390_PLT16DBL:
- /* find the plt entry and initialize it. */
- pe = (struct arch_single_entry *) &isym->pltent;
- if (pe->inited == 0) {
- ip = (unsigned long *)(ifile->plt->contents + pe->offset);
- ip[0] = 0x0d105810; /* basr 1,0; lg 1,10(1); br 1 */
- ip[1] = 0x100607f1;
- if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
- ip[2] = v - 2;
- else
- ip[2] = v;
- pe->inited = 1;
- }
-
- /* Insert relative distance to target. */
- v = plt + pe->offset - dot;
- if (ELF_R_TYPE(rel->r_info) == R_390_PLT32)
- *(unsigned int *) loc = (unsigned int) v;
- else if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
- *(unsigned short *) loc = (unsigned short) ((v + 2) >> 1);
- break;
-
- case R_390_GLOB_DAT:
- case R_390_JMP_SLOT:
- *loc = v;
- break;
-
- case R_390_RELATIVE:
- *loc += f->baseaddr;
- break;
-
- case R_390_GOTPC:
- *(unsigned long *) loc += got - dot;
- break;
-
- case R_390_GOT12:
- case R_390_GOT16:
- case R_390_GOT32:
- if (!isym->gotent.inited)
- {
- isym->gotent.inited = 1;
- *(ElfW(Addr) *)(ifile->got->contents + isym->gotent.offset) = v;
- }
- if (ELF_R_TYPE(rel->r_info) == R_390_GOT12)
- *(unsigned short *) loc |= (*(unsigned short *) loc + isym->gotent.offset) & 0xfff;
- else if (ELF_R_TYPE(rel->r_info) == R_390_GOT16)
- *(unsigned short *) loc += isym->gotent.offset;
- else if (ELF_R_TYPE(rel->r_info) == R_390_GOT32)
- *(unsigned int *) loc += isym->gotent.offset;
- break;
-
-# ifndef R_390_GOTOFF32
-# define R_390_GOTOFF32 R_390_GOTOFF
-# endif
- case R_390_GOTOFF32:
- *loc += v - got;
- break;
-
-#elif defined(__sh__)
-
- case R_SH_NONE:
- break;
-
- case R_SH_DIR32:
- *loc += v;
- break;
-
- case R_SH_REL32:
- *loc += v - dot;
- break;
-
- case R_SH_PLT32:
- *loc = v - dot;
- break;
-
- case R_SH_GLOB_DAT:
- case R_SH_JMP_SLOT:
- *loc = v;
- break;
-
- case R_SH_RELATIVE:
- *loc = f->baseaddr + rel->r_addend;
- break;
-
- case R_SH_GOTPC:
- *loc = got - dot + rel->r_addend;
- break;
-
- case R_SH_GOT32:
- goto bb_use_got;
-
- case R_SH_GOTOFF:
- *loc = v - got;
- break;
-
-# if defined(__SH5__)
- case R_SH_IMM_MEDLOW16:
- case R_SH_IMM_LOW16:
- {
- ElfW(Addr) word;
-
- if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16)
- v >>= 16;
-
- /*
- * movi and shori have the format:
- *
- * | op | imm | reg | reserved |
- * 31..26 25..10 9.. 4 3 .. 0
- *
- * so we simply mask and or in imm.
- */
- word = *loc & ~0x3fffc00;
- word |= (v & 0xffff) << 10;
-
- *loc = word;
-
- break;
- }
-
- case R_SH_IMM_MEDLOW16_PCREL:
- case R_SH_IMM_LOW16_PCREL:
- {
- ElfW(Addr) word;
-
- word = *loc & ~0x3fffc00;
-
- v -= dot;
-
- if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16_PCREL)
- v >>= 16;
-
- word |= (v & 0xffff) << 10;
-
- *loc = word;
-
- break;
- }
-# endif /* __SH5__ */
-
-#elif defined(__v850e__)
-
- case R_V850_NONE:
- break;
-
- case R_V850_32:
- /* We write two shorts instead of a long because even
- 32-bit insns only need half-word alignment, but
- 32-bit data needs to be long-word aligned. */
- v += ((unsigned short *)loc)[0];
- v += ((unsigned short *)loc)[1] << 16;
- ((unsigned short *)loc)[0] = v & 0xffff;
- ((unsigned short *)loc)[1] = (v >> 16) & 0xffff;
- break;
-
- case R_V850_22_PCREL:
- goto bb_use_plt;
-
-#elif defined(__x86_64__)
-
- case R_X86_64_NONE:
- break;
-
- case R_X86_64_64:
- *loc += v;
- break;
-
- case R_X86_64_32:
- *(unsigned int *) loc += v;
- if (v > 0xffffffff)
- {
- ret = obj_reloc_overflow; /* Kernel module compiled without -mcmodel=kernel. */
- /* error("Possibly is module compiled without -mcmodel=kernel!"); */
- }
- break;
-
- case R_X86_64_32S:
- *(signed int *) loc += v;
- break;
-
- case R_X86_64_16:
- *(unsigned short *) loc += v;
- break;
-
- case R_X86_64_8:
- *(unsigned char *) loc += v;
- break;
-
- case R_X86_64_PC32:
- *(unsigned int *) loc += v - dot;
- break;
-
- case R_X86_64_PC16:
- *(unsigned short *) loc += v - dot;
- break;
-
- case R_X86_64_PC8:
- *(unsigned char *) loc += v - dot;
- break;
-
- case R_X86_64_GLOB_DAT:
- case R_X86_64_JUMP_SLOT:
- *loc = v;
- break;
-
- case R_X86_64_RELATIVE:
- *loc += f->baseaddr;
- break;
-
- case R_X86_64_GOT32:
- case R_X86_64_GOTPCREL:
- goto bb_use_got;
-# if 0
- if (!isym->gotent.reloc_done)
- {
- isym->gotent.reloc_done = 1;
- *(Elf64_Addr *)(ifile->got->contents + isym->gotent.offset) = v;
- }
- /* XXX are these really correct? */
- if (ELF64_R_TYPE(rel->r_info) == R_X86_64_GOTPCREL)
- *(unsigned int *) loc += v + isym->gotent.offset;
- else
- *loc += isym->gotent.offset;
- break;
-# endif
-
-#else
-# warning "no idea how to handle relocations on your arch"
-#endif
-
- default:
- printf("Warning: unhandled reloc %d\n",(int)ELF_R_TYPE(rel->r_info));
- ret = obj_reloc_unhandled;
- break;
-
-#if defined(USE_PLT_ENTRIES)
-
-bb_use_plt:
-
- /* find the plt entry and initialize it if necessary */
-
-#if defined(USE_PLT_LIST)
- for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;)
- pe = pe->next;
-#else
- pe = &isym->pltent;
-#endif
-
- if (! pe->inited) {
- ip = (unsigned long *) (ifile->plt->contents + pe->offset);
-
- /* generate some machine code */
-
-#if defined(__arm__)
- ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */
- ip[1] = v; /* sym@ */
-#endif
-#if defined(__powerpc__)
- ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */
- ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */
- ip[2] = 0x7d6903a6; /* mtctr r11 */
- ip[3] = 0x4e800420; /* bctr */
-#endif
-#if defined(__v850e__)
- /* We have to trash a register, so we assume that any control
- transfer more than 21-bits away must be a function call
- (so we can use a call-clobbered register). */
- ip[0] = 0x0621 + ((v & 0xffff) << 16); /* mov sym, r1 ... */
- ip[1] = ((v >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */
-#endif
- pe->inited = 1;
- }
-
- /* relative distance to target */
- v -= dot;
- /* if the target is too far away.... */
-#if defined(__arm__) || defined(__powerpc__)
- if ((int)v < -0x02000000 || (int)v >= 0x02000000)
-#elif defined(__v850e__)
- if ((ElfW(Sword))v > 0x1fffff || (ElfW(Sword))v < (ElfW(Sword))-0x200000)
-#endif
- /* go via the plt */
- v = plt + pe->offset - dot;
-
-#if defined(__v850e__)
- if (v & 1)
-#else
- if (v & 3)
-#endif
- ret = obj_reloc_dangerous;
-
- /* merge the offset into the instruction. */
-#if defined(__arm__)
- /* Convert to words. */
- v >>= 2;
-
- *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff);
-#endif
-#if defined(__powerpc__)
- *loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc);
-#endif
-#if defined(__v850e__)
- /* We write two shorts instead of a long because even 32-bit insns
- only need half-word alignment, but the 32-bit data write needs
- to be long-word aligned. */
- ((unsigned short *)loc)[0] =
- (*(unsigned short *)loc & 0xffc0) /* opcode + reg */
- | ((v >> 16) & 0x3f); /* offs high part */
- ((unsigned short *)loc)[1] =
- (v & 0xffff); /* offs low part */
-#endif
- break;
-#endif /* USE_PLT_ENTRIES */
-
-#if defined(USE_GOT_ENTRIES)
-bb_use_got:
-
- /* needs an entry in the .got: set it, once */
- if (!isym->gotent.inited) {
- isym->gotent.inited = 1;
- *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v;
- }
- /* make the reloc with_respect_to_.got */
-#if defined(__sh__)
- *loc += isym->gotent.offset + rel->r_addend;
-#elif defined(__i386__) || defined(__arm__) || defined(__mc68000__)
- *loc += isym->gotent.offset;
-#endif
- break;
-
-#endif /* USE_GOT_ENTRIES */
- }
-
- return ret;
-}
-
-
-#if defined(USE_LIST)
-
-static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list,
- int offset, int size)
-{
- struct arch_list_entry *pe;
-
- for (pe = *list; pe != NULL; pe = pe->next) {
- if (pe->addend == rel->r_addend) {
- break;
- }
- }
-
- if (pe == NULL) {
- pe = xmalloc(sizeof(struct arch_list_entry));
- pe->next = *list;
- pe->addend = rel->r_addend;
- pe->offset = offset;
- pe->inited = 0;
- *list = pe;
- return size;
- }
- return 0;
-}
-
-#endif
-
-#if defined(USE_SINGLE)
-
-static int arch_single_init(ElfW(RelM) *rel, struct arch_single_entry *single,
- int offset, int size)
-{
- if (single->allocated == 0) {
- single->allocated = 1;
- single->offset = offset;
- single->inited = 0;
- return size;
- }
- return 0;
-}
-
-#endif
-
-#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
-
-static struct obj_section *arch_xsect_init(struct obj_file *f, const char *name,
- int offset, int size)
-{
- struct obj_section *myrelsec = obj_find_section(f, name);
-
- if (offset == 0) {
- offset += size;
- }
-
- if (myrelsec) {
- obj_extend_section(myrelsec, offset);
- } else {
- myrelsec = obj_create_alloced_section(f, name,
- size, offset);
- }
-
- return myrelsec;
-}
-
-#endif
-
-static void arch_create_got(struct obj_file *f)
-{
-#if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
- struct arch_file *ifile = (struct arch_file *) f;
- int i;
-#if defined(USE_GOT_ENTRIES)
- int got_offset = 0, got_needed = 0, got_allocate;
-#endif
-#if defined(USE_PLT_ENTRIES)
- int plt_offset = 0, plt_needed = 0, plt_allocate;
-#endif
- struct obj_section *relsec, *symsec, *strsec;
- ElfW(RelM) *rel, *relend;
- ElfW(Sym) *symtab, *extsym;
- const char *strtab, *name;
- struct arch_symbol *intsym;
-
- for (i = 0; i < f->header.e_shnum; ++i) {
- relsec = f->sections[i];
- if (relsec->header.sh_type != SHT_RELM)
- continue;
-
- symsec = f->sections[relsec->header.sh_link];
- strsec = f->sections[symsec->header.sh_link];
-
- rel = (ElfW(RelM) *) relsec->contents;
- relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM)));
- symtab = (ElfW(Sym) *) symsec->contents;
- strtab = (const char *) strsec->contents;
-
- for (; rel < relend; ++rel) {
- extsym = &symtab[ELF_R_SYM(rel->r_info)];
-
-#if defined(USE_GOT_ENTRIES)
- got_allocate = 0;
-#endif
-#if defined(USE_PLT_ENTRIES)
- plt_allocate = 0;
-#endif
-
- switch (ELF_R_TYPE(rel->r_info)) {
-#if defined(__arm__)
- case R_ARM_PC24:
- case R_ARM_PLT32:
- plt_allocate = 1;
- break;
-
- case R_ARM_GOTOFF:
- case R_ARM_GOTPC:
- got_needed = 1;
- continue;
-
- case R_ARM_GOT32:
- got_allocate = 1;
- break;
-
-#elif defined(__i386__)
- case R_386_GOTPC:
- case R_386_GOTOFF:
- got_needed = 1;
- continue;
-
- case R_386_GOT32:
- got_allocate = 1;
- break;
-
-#elif defined(__powerpc__)
- case R_PPC_REL24:
- plt_allocate = 1;
- break;
-
-#elif defined(__mc68000__)
- case R_68K_GOT32:
- got_allocate = 1;
- break;
-
-#ifdef R_68K_GOTOFF
- case R_68K_GOTOFF:
- got_needed = 1;
- continue;
-#endif
-
-#elif defined(__sh__)
- case R_SH_GOT32:
- got_allocate = 1;
- break;
-
- case R_SH_GOTPC:
- case R_SH_GOTOFF:
- got_needed = 1;
- continue;
-
-#elif defined(__v850e__)
- case R_V850_22_PCREL:
- plt_needed = 1;
- break;
-
-#endif
- default:
- continue;
- }
-
- if (extsym->st_name != 0) {
- name = strtab + extsym->st_name;
- } else {
- name = f->sections[extsym->st_shndx]->name;
- }
- intsym = (struct arch_symbol *) obj_find_symbol(f, name);
-#if defined(USE_GOT_ENTRIES)
- if (got_allocate) {
- got_offset += arch_single_init(
- rel, &intsym->gotent,
- got_offset, GOT_ENTRY_SIZE);
-
- got_needed = 1;
- }
-#endif
-#if defined(USE_PLT_ENTRIES)
- if (plt_allocate) {
-#if defined(USE_PLT_LIST)
- plt_offset += arch_list_add(
- rel, &intsym->pltent,
- plt_offset, PLT_ENTRY_SIZE);
-#else
- plt_offset += arch_single_init(
- rel, &intsym->pltent,
- plt_offset, PLT_ENTRY_SIZE);
-#endif
- plt_needed = 1;
- }
-#endif
- }
- }
-
-#if defined(USE_GOT_ENTRIES)
- if (got_needed) {
- ifile->got = arch_xsect_init(f, ".got", got_offset,
- GOT_ENTRY_SIZE);
- }
-#endif
-
-#if defined(USE_PLT_ENTRIES)
- if (plt_needed) {
- ifile->plt = arch_xsect_init(f, ".plt", plt_offset,
- PLT_ENTRY_SIZE);
- }
-#endif
-
-#endif /* defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) */
-}
-
-/*======================================================================*/
-
-/* Standard ELF hash function. */
-static unsigned long obj_elf_hash_n(const char *name, unsigned long n)
-{
- unsigned long h = 0;
- unsigned long g;
- unsigned char ch;
-
- while (n > 0) {
- ch = *name++;
- h = (h << 4) + ch;
- 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));
-}
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
-/* String comparison for non-co-versioned kernel and module. */
-
-static int ncv_strcmp(const char *a, const char *b)
-{
- size_t alen = strlen(a), blen = strlen(b);
-
- if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R')
- return strncmp(a, b, alen);
- else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R')
- return strncmp(a, b, blen);
- else
- return strcmp(a, b);
-}
-
-/* String hashing for non-co-versioned kernel and module. Here
- we are simply forced to drop the crc from the hash. */
-
-static unsigned long ncv_symbol_hash(const char *str)
-{
- size_t len = strlen(str);
- if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R')
- len -= 10;
- return obj_elf_hash_n(str, len);
-}
-
-static void
-obj_set_symbol_compare(struct obj_file *f,
- int (*cmp) (const char *, const char *),
- unsigned long (*hash) (const char *))
-{
- if (cmp)
- f->symbol_cmp = cmp;
- if (hash) {
- struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next;
- int i;
-
- f->symbol_hash = hash;
-
- memcpy(tmptab, f->symtab, sizeof(tmptab));
- memset(f->symtab, 0, sizeof(f->symtab));
-
- for (i = 0; i < HASH_BUCKETS; ++i)
- for (sym = tmptab[i]; sym; sym = next) {
- unsigned long h = hash(sym->name) % HASH_BUCKETS;
- next = sym->next;
- sym->next = f->symtab[h];
- f->symtab[h] = sym;
- }
- }
-}
-
-#endif /* FEATURE_INSMOD_VERSION_CHECKING */
-
-static struct obj_symbol *
-obj_add_symbol(struct obj_file *f, const char *name,
- unsigned long symidx, int info,
- int secidx, ElfW(Addr) value,
- unsigned long size)
-{
- struct obj_symbol *sym;
- unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
- int n_type = ELF_ST_TYPE(info);
- int n_binding = ELF_ST_BIND(info);
-
- for (sym = f->symtab[hash]; sym; sym = sym->next)
- if (f->symbol_cmp(sym->name, name) == 0) {
- int o_secidx = sym->secidx;
- int o_info = sym->info;
- int o_type = ELF_ST_TYPE(o_info);
- int o_binding = ELF_ST_BIND(o_info);
-
- /* A redefinition! Is it legal? */
-
- if (secidx == SHN_UNDEF)
- return sym;
- else if (o_secidx == SHN_UNDEF)
- goto found;
- else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) {
- /* Cope with local and global symbols of the same name
- in the same object file, as might have been created
- by ld -r. The only reason locals are now seen at this
- level at all is so that we can do semi-sensible things
- with parameters. */
-
- struct obj_symbol *nsym, **p;
-
- nsym = arch_new_symbol();
- nsym->next = sym->next;
- nsym->ksymidx = -1;
-
- /* Excise the old (local) symbol from the hash chain. */
- for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next)
- continue;
- *p = sym = nsym;
- goto found;
- } else if (n_binding == STB_LOCAL) {
- /* Another symbol of the same name has already been defined.
- Just add this to the local table. */
- sym = arch_new_symbol();
- sym->next = NULL;
- sym->ksymidx = -1;
- f->local_symtab[symidx] = sym;
- goto found;
- } else if (n_binding == STB_WEAK)
- return sym;
- else if (o_binding == STB_WEAK)
- goto found;
- /* Don't unify COMMON symbols with object types the programmer
- doesn't expect. */
- else if (secidx == SHN_COMMON
- && (o_type == STT_NOTYPE || o_type == STT_OBJECT))
- return sym;
- else if (o_secidx == SHN_COMMON
- && (n_type == STT_NOTYPE || n_type == STT_OBJECT))
- goto found;
- else {
- /* Don't report an error if the symbol is coming from
- the kernel or some external module. */
- if (secidx <= SHN_HIRESERVE)
- bb_error_msg("%s multiply defined", name);
- return sym;
- }
- }
-
- /* Completely new symbol. */
- sym = arch_new_symbol();
- sym->next = f->symtab[hash];
- f->symtab[hash] = sym;
- sym->ksymidx = -1;
-
- if (ELF_ST_BIND(info) == STB_LOCAL && symidx != -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
-#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
- int gpl;
-
- gpl = obj_gpl_license(f, NULL) == 0;
-#endif
- for (i = 0, s = syms; i < nsyms; ++i, ++s) {
- /* Only add symbols that are already marked external.
- If we override locals we may cause problems for
- argument initialization. We will also create a false
- dependency on the module. */
- struct obj_symbol *sym;
- char *name;
-
- /* GPL licensed modules can use symbols exported with
- * EXPORT_SYMBOL_GPL, so ignore any GPLONLY_ prefix on the
- * exported names. Non-GPL modules never see any GPLONLY_
- * symbols so they cannot fudge it by adding the prefix on
- * their references.
- */
- if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) {
-#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
- if (gpl)
- s->name += 8;
- else
-#endif
- continue;
- }
- name = (char *)s->name;
-
-#ifdef SYMBOL_PREFIX
- /* Prepend SYMBOL_PREFIX to the symbol's name (the
- kernel exports `C names', but module object files
- reference `linker names'). */
- size_t extra = sizeof SYMBOL_PREFIX;
- size_t name_size = strlen(name) + extra;
- if (name_size > name_alloced_size) {
- name_alloced_size = name_size * 2;
- name_buf = alloca(name_alloced_size);
- }
- strcpy(name_buf, SYMBOL_PREFIX);
- strcpy(name_buf + extra - 1, name);
- name = name_buf;
-#endif /* SYMBOL_PREFIX */
-
- sym = obj_find_symbol(f, name);
- if (sym && !(ELF_ST_BIND(sym->info) == STB_LOCAL)) {
-#ifdef SYMBOL_PREFIX
- /* Put NAME_BUF into more permanent storage. */
- name = xmalloc(name_size);
- strcpy(name, name_buf);
-#endif
- sym = obj_add_symbol(f, name, -1,
- ELF_ST_INFO(STB_GLOBAL,
- STT_NOTYPE),
- idx, s->value, 0);
- /* Did our symbol just get installed? If so, mark the
- module as "used". */
- if (sym->secidx == idx)
- used = 1;
- }
- }
-
- return used;
-}
-
-static void add_kernel_symbols(struct obj_file *f)
-{
- struct external_module *m;
- int i, nused = 0;
-
- /* Add module symbols first. */
-
- for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) {
- if (m->nsyms
- && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, m->nsyms)
- ) {
- m->used = 1;
- ++nused;
- }
- }
-
- n_ext_modules_used = nused;
-
- /* And finally the symbols from the kernel proper. */
-
- if (nksyms)
- add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms);
-}
-
-static char *get_modinfo_value(struct obj_file *f, const char *key)
-{
- struct obj_section *sec;
- char *p, *v, *n, *ep;
- size_t klen = strlen(key);
-
- sec = obj_find_section(f, ".modinfo");
- if (sec == NULL)
- return NULL;
- p = sec->contents;
- ep = p + sec->header.sh_size;
- while (p < ep) {
- v = strchr(p, '=');
- n = strchr(p, '\0');
- if (v) {
- if (p + klen == v && strncmp(p, key, klen) == 0)
- return v + 1;
- } else {
- if (p + klen == n && strcmp(p, key) == 0)
- return n;
- }
- p = n + 1;
- }
-
- return NULL;
-}
-
-
-/*======================================================================*/
-/* Functions relating to module loading after 2.1.18. */
-
-static 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 useful, as the previous case
- doesn't nul terminate the string ??? */
- str[r - q] = '\0';
-
- /* Keep next fields */
- q = r;
- } else {
- /* last string */
- str = q;
- q = (char*)"";
- }
- }
-
- if (*p == 's') {
- /* Normal string */
- obj_string_patch(f, sym->secidx, loc - contents, str);
- loc += tgt_sizeof_char_p;
- } else {
- /* Array of chars (in fact, matrix!) */
- unsigned long charssize; /* size of each member */
-
- /* Get the size of each member */
- /* Probably we should do that outside the loop ? */
- if (!isdigit(*(p + 1))) {
- bb_error_msg("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;
-}
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
-static int new_is_module_checksummed(struct obj_file *f)
-{
- const char *p = get_modinfo_value(f, "using_checksums");
- if (p)
- return xatoi(p);
- 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 /* FEATURE_INSMOD_VERSION_CHECKING */
-
-
-/* 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,
- ELF_ST_INFO(STB_LOCAL, STT_OBJECT), sec->idx, 0,
- sizeof(struct new_module));
-
- obj_string_patch(f, sec->idx, offsetof(struct new_module, name),
- m_name);
-
- return 1;
-}
-
-#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
-/* add an entry to the __ksymtab section, creating it if necessary */
-static void new_add_ksymtab(struct obj_file *f, struct obj_symbol *sym)
-{
- struct obj_section *sec;
- ElfW(Addr) ofs;
-
- /* ensure __ksymtab is allocated, EXPORT_NOSYMBOLS creates a non-alloc section.
- * If __ksymtab is defined but not marked alloc, x out the first character
- * (no obj_delete routine) and create a new __ksymtab with the correct
- * characteristics.
- */
- sec = obj_find_section(f, "__ksymtab");
- if (sec && !(sec->header.sh_flags & SHF_ALLOC)) {
- *((char *)(sec->name)) = 'x'; /* override const */
- sec = NULL;
- }
- if (!sec)
- sec = obj_create_alloced_section(f, "__ksymtab",
- tgt_sizeof_void_p, 0);
- if (!sec)
- return;
- sec->header.sh_flags |= SHF_ALLOC;
- /* Empty section might be byte-aligned */
- sec->header.sh_addralign = tgt_sizeof_void_p;
- ofs = sec->header.sh_size;
- obj_symbol_patch(f, sec->idx, ofs, sym);
- obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, sym->name);
- obj_extend_section(sec, 2 * tgt_sizeof_char_p);
-}
-#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
-
-static int new_create_module_ksymtab(struct obj_file *f)
-{
- struct obj_section *sec;
- int i;
-
- /* We must always add the module references. */
-
- if (n_ext_modules_used) {
- struct new_module_ref *dep;
- struct obj_symbol *tm;
-
- sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p,
- (sizeof(struct new_module_ref)
- * n_ext_modules_used));
- if (!sec)
- return 0;
-
- tm = obj_find_symbol(f, SPFX "__this_module");
- dep = (struct new_module_ref *) sec->contents;
- for (i = 0; i < n_ext_modules; ++i)
- if (ext_modules[i].used) {
- dep->dep = ext_modules[i].addr;
- obj_symbol_patch(f, sec->idx,
- (char *) &dep->ref - sec->contents, tm);
- dep->next_ref = 0;
- ++dep;
- }
- }
-
- if (!flag_noexport && !obj_find_section(f, "__ksymtab")) {
- size_t nsyms;
- int *loaded;
-
- sec = obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, 0);
-
- /* We don't want to export symbols residing in sections that
- aren't loaded. There are a number of these created so that
- we make sure certain module options don't appear twice. */
-
- loaded = alloca(sizeof(int) * (i = f->header.e_shnum));
- while (--i >= 0)
- loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0;
-
- for (nsyms = i = 0; i < HASH_BUCKETS; ++i) {
- struct obj_symbol *sym;
- for (sym = f->symtab[i]; sym; sym = sym->next)
- if (ELF_ST_BIND(sym->info) != STB_LOCAL
- && sym->secidx <= SHN_HIRESERVE
- && (sym->secidx >= SHN_LORESERVE
- || loaded[sym->secidx])) {
- ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p;
-
- obj_symbol_patch(f, sec->idx, ofs, sym);
- obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p,
- sym->name);
-
- nsyms++;
- }
- }
-
- obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p);
- }
-
- return 1;
-}
-
-
-static int
-new_init_module(const char *m_name, struct obj_file *f, unsigned long m_size)
-{
- struct new_module *module;
- struct obj_section *sec;
- void *image;
- int ret;
- tgt_long m_addr;
-
- sec = obj_find_section(f, ".this");
- if (!sec || !sec->contents) {
- bb_perror_msg_and_die("corrupt module %s?",m_name);
- }
- module = (struct new_module *) sec->contents;
- m_addr = sec->header.sh_addr;
-
- module->size_of_struct = sizeof(*module);
- module->size = m_size;
- module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0;
-
- sec = obj_find_section(f, "__ksymtab");
- if (sec && sec->header.sh_size) {
- module->syms = sec->header.sh_addr;
- module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p);
- }
-
- if (n_ext_modules_used) {
- sec = obj_find_section(f, ".kmodtab");
- module->deps = sec->header.sh_addr;
- module->ndeps = n_ext_modules_used;
- }
-
- module->init =
- obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module"));
- module->cleanup =
- obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module"));
-
- sec = obj_find_section(f, "__ex_table");
- if (sec) {
- module->ex_table_start = sec->header.sh_addr;
- module->ex_table_end = sec->header.sh_addr + sec->header.sh_size;
- }
-
- sec = obj_find_section(f, ".text.init");
- if (sec) {
- module->runsize = sec->header.sh_addr - m_addr;
- }
- sec = obj_find_section(f, ".data.init");
- if (sec) {
- if (!module->runsize ||
- module->runsize > sec->header.sh_addr - m_addr)
- module->runsize = sec->header.sh_addr - m_addr;
- }
- sec = obj_find_section(f, ARCHDATA_SEC_NAME);
- if (sec && sec->header.sh_size) {
- module->archdata_start = (void*)sec->header.sh_addr;
- module->archdata_end = module->archdata_start + sec->header.sh_size;
- }
- sec = obj_find_section(f, KALLSYMS_SEC_NAME);
- if (sec && sec->header.sh_size) {
- module->kallsyms_start = (void*)sec->header.sh_addr;
- module->kallsyms_end = module->kallsyms_start + sec->header.sh_size;
- }
-
- /* Whew! All of the initialization is complete. Collect the final
- module image and give it to the kernel. */
-
- image = xmalloc(m_size);
- obj_create_image(f, image);
-
- ret = init_module(m_name, (struct new_module *) image);
- if (ret)
- bb_perror_msg("init_module: %s", m_name);
-
- free(image);
-
- return ret == 0;
-}
-
-
-/*======================================================================*/
-
-static 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;
-}
-
-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;
-}
-
-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 (ELF_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 = ELF_R_SYM(rel->r_info);
- if (symndx) {
- /* Note we've already checked for undefined symbols. */
-
- extsym = &symtab[symndx];
- if (ELF_ST_BIND(extsym->st_info) == STB_LOCAL) {
- /* Local symbols we look up in the local table to be sure
- we get the one that is really intended. */
- intsym = f->local_symtab[symndx];
- } else {
- /* Others we look up in the hash table. */
- const char *name;
- if (extsym->st_name)
- name = strtab + extsym->st_name;
- else
- name = f->sections[extsym->st_shndx]->name;
- intsym = obj_find_symbol(f, name);
- }
-
- value = obj_symbol_final_value(f, intsym);
- intsym->referenced = 1;
- }
-#if SHT_RELM == SHT_RELA
-#if defined(__alpha__) && defined(AXP_BROKEN_GAS)
- /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */
- if (!extsym || !extsym->st_name ||
- ELF_ST_BIND(extsym->st_info) != STB_LOCAL)
-#endif
- value += rel->r_addend;
-#endif
-
- /* Do it! */
- switch (arch_apply_relocation
- (f, targsec, symsec, intsym, rel, value)
- ) {
- case obj_reloc_ok:
- break;
-
- case obj_reloc_overflow:
- errmsg = "Relocation overflow";
- goto bad_reloc;
- case obj_reloc_dangerous:
- errmsg = "Dangerous relocation";
- goto bad_reloc;
- case obj_reloc_unhandled:
- errmsg = "Unhandled relocation";
-bad_reloc:
- if (extsym) {
- bb_error_msg("%s of type %ld for %s", errmsg,
- (long) ELF_R_TYPE(rel->r_info),
- strtab + extsym->st_name);
- } else {
- bb_error_msg("%s of type %ld", errmsg,
- (long) ELF_R_TYPE(rel->r_info));
- }
- ret = 0;
- break;
- }
- }
- }
-
- /* Finally, take care of the patches. */
-
- if (f->string_patches) {
- struct obj_string_patch *p;
- struct obj_section *strsec;
- ElfW(Addr) strsec_base;
- strsec = obj_find_section(f, ".kstrtab");
- strsec_base = strsec->header.sh_addr;
-
- for (p = f->string_patches; p; p = p->next) {
- struct obj_section *targsec = f->sections[p->reloc_secidx];
- *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
- = strsec_base + p->string_offset;
- }
- }
-
- if (f->symbol_patches) {
- struct obj_symbol_patch *p;
-
- for (p = f->symbol_patches; p; p = p->next) {
- struct obj_section *targsec = f->sections[p->reloc_secidx];
- *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
- = obj_symbol_final_value(f, p->sym);
- }
- }
-
- return ret;
-}
-
-static int obj_create_image(struct obj_file *f, char *image)
-{
- struct obj_section *sec;
- ElfW(Addr) base = f->baseaddr;
-
- for (sec = f->load_order; sec; sec = sec->load_next) {
- char *secimg;
-
- if (sec->contents == 0 || sec->header.sh_size == 0)
- continue;
-
- secimg = image + (sec->header.sh_addr - base);
-
- /* Note that we allocated data for NOBITS sections earlier. */
- memcpy(secimg, sec->contents, sec->header.sh_size);
- }
-
- return 1;
-}
-
-/*======================================================================*/
-
-static struct obj_file *obj_load(FILE * fp, int loadprogbits)
-{
- 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] != (BB_BIG_ENDIAN
- ? ELFDATA2MSB : ELFDATA2LSB)
- || 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 = xzalloc(j * sizeof(struct obj_symbol *));
-
- /* Insert all symbols into the hash table. */
- for (j = 1, ++sym; j < nsym; ++j, ++sym) {
- ElfW(Addr) val = sym->st_value;
- const char *name;
- if (sym->st_name)
- name = strtab + sym->st_name;
- else if (sym->st_shndx < shnum)
- name = f->sections[sym->st_shndx]->name;
- else
- continue;
-#if defined(__SH5__)
- /*
- * For sh64 it is possible that the target of a branch
- * requires a mode switch (32 to 16 and back again).
- *
- * This is implied by the lsb being set in the target
- * address for SHmedia mode and clear for SHcompact.
- */
- val |= sym->st_other & 4;
-#endif
-
- obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx,
- val, sym->st_size);
- }
- }
- break;
-
- case SHT_RELM:
- if (sec->header.sh_entsize != sizeof(ElfW(RelM))) {
- bb_error_msg("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;
-}
-
-#if ENABLE_FEATURE_INSMOD_LOADINKMEM
-/*
- * load the unloaded sections directly into the memory allocated by
- * kernel for the module
- */
-
-static int obj_load_progbits(FILE * fp, struct obj_file* f, char* imagebase)
-{
- ElfW(Addr) base = f->baseaddr;
- struct obj_section* sec;
-
- for (sec = f->load_order; sec; sec = sec->load_next) {
-
- /* section already loaded? */
- if (sec->contents != NULL)
- continue;
-
- if (sec->header.sh_size == 0)
- continue;
-
- sec->contents = imagebase + (sec->header.sh_addr - base);
- fseek(fp, sec->header.sh_offset, SEEK_SET);
- if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) {
- bb_perror_msg("error reading ELF section data");
- return 0;
- }
-
- }
- return 1;
-}
-#endif
-
-static void hide_special_symbols(struct obj_file *f)
-{
- static const char *const specials[] = {
- SPFX "cleanup_module",
- SPFX "init_module",
- SPFX "kernel_version",
- NULL
- };
-
- struct obj_symbol *sym;
- const char *const *p;
-
- for (p = specials; *p; ++p) {
- sym = obj_find_symbol(f, *p);
- if (sym != NULL)
- sym->info = ELF_ST_INFO(STB_LOCAL, ELF_ST_TYPE(sym->info));
- }
-}
-
-
-#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
-static int obj_gpl_license(struct obj_file *f, const char **license)
-{
- struct obj_section *sec;
- /* This list must match *exactly* the list of allowable licenses in
- * linux/include/linux/module.h. Checking for leading "GPL" will not
- * work, somebody will use "GPL sucks, this is proprietary".
- */
- static const char *const gpl_licenses[] = {
- "GPL",
- "GPL v2",
- "GPL and additional rights",
- "Dual BSD/GPL",
- "Dual MPL/GPL"
- };
-
- sec = obj_find_section(f, ".modinfo");
- if (sec) {
- const char *value, *ptr, *endptr;
- ptr = sec->contents;
- endptr = ptr + sec->header.sh_size;
- while (ptr < endptr) {
- value = strchr(ptr, '=');
- if (value && strncmp(ptr, "license", value-ptr) == 0) {
- int i;
- if (license)
- *license = value+1;
- for (i = 0; i < ARRAY_SIZE(gpl_licenses); ++i) {
- if (strcmp(value+1, gpl_licenses[i]) == 0)
- return 0;
- }
- return 2;
- }
- 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)
-{
- static smallint printed_info;
-
- char buf[80];
- int oldval;
-
- if (fd < 0 && !kernel_has_tainted)
- return; /* New modutils on old kernel */
- printf("Warning: loading %s will taint the kernel: %s%s\n",
- m_name, text1, text2);
- if (!printed_info) {
- printf(" See %s for information about tainted modules\n", TAINT_URL);
- printed_info = 1;
- }
- if (fd >= 0) {
- read(fd, buf, sizeof(buf)-1);
- buf[sizeof(buf)-1] = '\0';
- oldval = strtoul(buf, NULL, 10);
- sprintf(buf, "%d\n", oldval | taint);
- write(fd, buf, strlen(buf));
- }
-}
-
-/* Check if loading this module will taint the kernel. */
-static void check_tainted_module(struct obj_file *f, char *m_name)
-{
- static const char tainted_file[] ALIGN1 = TAINT_FILENAME;
-
- int fd, kernel_has_tainted;
- const char *ptr;
-
- kernel_has_tainted = 1;
- fd = open(tainted_file, O_RDWR);
- if (fd < 0) {
- if (errno == ENOENT)
- kernel_has_tainted = 0;
- else if (errno == EACCES)
- kernel_has_tainted = 1;
- else {
- perror(tainted_file);
- kernel_has_tainted = 0;
- }
- }
-
- switch (obj_gpl_license(f, &ptr)) {
- case 0:
- break;
- case 1:
- set_tainted(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 /* FEATURE_CHECK_TAINTED_MODULE */
-#define check_tainted_module(x, y) do { } while (0);
-#endif /* FEATURE_CHECK_TAINTED_MODULE */
-
-#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
-/* add module source, timestamp, kernel version and a symbol for the
- * start of some sections. this info is used by ksymoops to do better
- * debugging.
- */
-static int
-get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
-{
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
- return new_get_module_version(f, str);
-#else /* FEATURE_INSMOD_VERSION_CHECKING */
- strncpy(str, "???", sizeof(str));
- return -1;
-#endif /* FEATURE_INSMOD_VERSION_CHECKING */
-}
-
-/* add module source, timestamp, kernel version and a symbol for the
- * start of some sections. this info is used by ksymoops to do better
- * debugging.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-static void
-add_ksymoops_symbols(struct obj_file *f, const char *filename,
- const char *m_name)
-{
- static const char symprefix[] ALIGN1 = "__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 = xstrdup(real);
- } else {
- bb_perror_msg("cannot get realpath for %s", filename);
- absolute_filename = xstrdup(filename);
- }
-
- lm_name = strlen(m_name);
- lfilename = strlen(absolute_filename);
-
- /* add to ksymtab if it already exists or there is no ksymtab and other symbols
- * are not to be exported. otherwise leave ksymtab alone for now, the
- * "export all symbols" compatibility code will export these symbols later.
- */
- use_ksymtab = obj_find_section(f, "__ksymtab") || flag_noexport;
-
- sec = obj_find_section(f, ".this");
- if (sec) {
- /* tag the module header with the object name, last modified
- * timestamp and module version. worst case for module version
- * is 0xffffff, decimal 16777215. putting all three fields in
- * one symbol is less readable but saves kernel space.
- */
- l = sizeof(symprefix)+ /* "__insmod_" */
- lm_name+ /* module name */
- 2+ /* "_O" */
- lfilename+ /* object filename */
- 2+ /* "_M" */
- 2*sizeof(statbuf.st_mtime)+ /* mtime in hex */
- 2+ /* "_V" */
- 8+ /* version in dec */
- 1; /* nul */
- name = xmalloc(l);
- if (stat(absolute_filename, &statbuf) != 0)
- statbuf.st_mtime = 0;
- version = get_module_version(f, str); /* -1 if not found */
- snprintf(name, l, "%s%s_O%s_M%0*lX_V%d",
- symprefix, m_name, absolute_filename,
- (int)(2*sizeof(statbuf.st_mtime)), statbuf.st_mtime,
- version);
- sym = obj_add_symbol(f, name, -1,
- ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
- sec->idx, sec->header.sh_addr, 0);
- if (use_ksymtab)
- new_add_ksymtab(f, sym);
- }
- free(absolute_filename);
-#ifdef _NOT_SUPPORTED_
- /* record where the persistent data is going, same address as previous symbol */
-
- if (f->persist) {
- l = sizeof(symprefix)+ /* "__insmod_" */
- lm_name+ /* module name */
- 2+ /* "_P" */
- strlen(f->persist)+ /* data store */
- 1; /* nul */
- name = xmalloc(l);
- snprintf(name, l, "%s%s_P%s",
- symprefix, m_name, f->persist);
- sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
- sec->idx, sec->header.sh_addr, 0);
- if (use_ksymtab)
- new_add_ksymtab(f, sym);
- }
-#endif /* _NOT_SUPPORTED_ */
- /* tag the desired sections if size is non-zero */
-
- for (i = 0; i < ARRAY_SIZE(section_names); ++i) {
- sec = obj_find_section(f, section_names[i]);
- if (sec && sec->header.sh_size) {
- l = sizeof(symprefix)+ /* "__insmod_" */
- lm_name+ /* module name */
- 2+ /* "_S" */
- strlen(sec->name)+ /* section name */
- 2+ /* "_L" */
- 8+ /* length in dec */
- 1; /* nul */
- name = xmalloc(l);
- snprintf(name, l, "%s%s_S%s_L%ld",
- symprefix, m_name, sec->name,
- (long)sec->header.sh_size);
- sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
- sec->idx, sec->header.sh_addr, 0);
- if (use_ksymtab)
- new_add_ksymtab(f, sym);
- }
- }
-}
-#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
-
-#if ENABLE_FEATURE_INSMOD_LOAD_MAP
-static void print_load_map(struct obj_file *f)
-{
- struct obj_section *sec;
-#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
- struct obj_symbol **all, **p;
- int i, nsyms, *loaded;
- struct obj_symbol *sym;
-#endif
- /* Report on the section layout. */
-
- printf("Sections: Size %-*s Align\n",
- (int) (2 * sizeof(void *)), "Address");
-
- for (sec = f->load_order; sec; sec = sec->load_next) {
- int a;
- unsigned long tmp;
-
- for (a = -1, tmp = sec->header.sh_addralign; tmp; ++a)
- tmp >>= 1;
- if (a == -1)
- a = 0;
-
- printf("%-15s %08lx %0*lx 2**%d\n",
- sec->name,
- (long)sec->header.sh_size,
- (int) (2 * sizeof(void *)),
- (long)sec->header.sh_addr,
- a);
- }
-#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
- /* Quick reference which section indicies are loaded. */
+//config:config INSMOD
+//config: bool "insmod (22 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: insmod is used to load specified modules in the running kernel.
- loaded = alloca(sizeof(int) * (i = f->header.e_shnum));
- while (--i >= 0)
- loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0;
+//applet:IF_INSMOD(IF_NOT_MODPROBE_SMALL(APPLET_NOEXEC(insmod, insmod, BB_DIR_SBIN, BB_SUID_DROP, insmod)))
- /* Collect the symbols we'll be listing. */
+//kbuild:ifneq ($(CONFIG_MODPROBE_SMALL),y)
+//kbuild:lib-$(CONFIG_INSMOD) += insmod.o modutils.o
+//kbuild:endif
- for (nsyms = i = 0; i < HASH_BUCKETS; ++i)
- for (sym = f->symtab[i]; sym; sym = sym->next)
- if (sym->secidx <= SHN_HIRESERVE
- && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
- ++nsyms;
-
- all = alloca(nsyms * sizeof(struct obj_symbol *));
-
- for (i = 0, p = all; i < HASH_BUCKETS; ++i)
- for (sym = f->symtab[i]; sym; sym = sym->next)
- if (sym->secidx <= SHN_HIRESERVE
- && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
- *p++ = sym;
-
- /* And list them. */
- printf("\nSymbols:\n");
- for (p = all; p < all + nsyms; ++p) {
- char type = '?';
- unsigned long value;
-
- sym = *p;
- if (sym->secidx == SHN_ABS) {
- type = 'A';
- value = sym->value;
- } else if (sym->secidx == SHN_UNDEF) {
- type = 'U';
- value = 0;
- } else {
- sec = f->sections[sym->secidx];
-
- if (sec->header.sh_type == SHT_NOBITS)
- type = 'B';
- else if (sec->header.sh_flags & SHF_ALLOC) {
- if (sec->header.sh_flags & SHF_EXECINSTR)
- type = 'T';
- else if (sec->header.sh_flags & SHF_WRITE)
- type = 'D';
- else
- type = 'R';
- }
- value = sym->value + sec->header.sh_addr;
- }
-
- if (ELF_ST_BIND(sym->info) == STB_LOCAL)
- type = tolower(type);
-
- printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value,
- type, sym->name);
- }
-#endif
-}
-#else /* !FEATURE_INSMOD_LOAD_MAP */
-void print_load_map(struct obj_file *f);
-#endif
-
-int insmod_main( int argc, char **argv);
-int insmod_main( int argc, char **argv)
-{
- char *opt_o, *arg1;
- int len;
- int k_crcs;
- char *tmp, *tmp1;
- unsigned long m_size;
- ElfW(Addr) m_addr;
- struct obj_file *f;
- struct stat st;
- char *m_name = 0;
- int exit_status = EXIT_FAILURE;
- int m_has_modinfo;
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
- struct utsname uts_info;
- char m_strversion[STRVERSIONLEN];
- int m_version, m_crcs;
-#endif
-#if ENABLE_FEATURE_CLEAN_UP
- FILE *fp = NULL;
-#else
- FILE *fp;
-#endif
- int k_version = 0;
- struct utsname myuname;
-
- /* Parse any options */
- getopt32(argv, OPTION_STR, &opt_o);
- arg1 = argv[optind];
- if (option_mask32 & OPT_o) { // -o /* name the output module */
- free(m_name);
- m_name = xstrdup(opt_o);
- }
-
- if (arg1 == NULL) {
- bb_show_usage();
- }
-
- /* Grab the module name */
- tmp1 = xstrdup(arg1);
- tmp = basename(tmp1);
- len = strlen(tmp);
-
- if (uname(&myuname) == 0) {
- if (myuname.release[0] == '2') {
- k_version = myuname.release[2] - '0';
- }
- }
-
-#if ENABLE_FEATURE_2_6_MODULES
- if (k_version > 4 && len > 3 && tmp[len - 3] == '.'
- && tmp[len - 2] == 'k' && tmp[len - 1] == 'o'
- ) {
- len -= 3;
- tmp[len] = '\0';
- } else
-#endif
- if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') {
- len -= 2;
- tmp[len] = '\0';
- }
-
-
-#if ENABLE_FEATURE_2_6_MODULES
- if (k_version > 4)
- m_fullName = xasprintf("%s.ko", tmp);
- else
-#endif
- m_fullName = xasprintf("%s.o", tmp);
-
- if (!m_name) {
- m_name = tmp;
- } else {
- free(tmp1);
- tmp1 = 0; /* flag for free(m_name) before exit() */
- }
-
- /* Get a filedesc for the module. Check that we have a complete path */
- if (stat(arg1, &st) < 0 || !S_ISREG(st.st_mode)
- || (fp = fopen(arg1, "r")) == NULL
- ) {
- /* Hmm. Could not open it. First search under /lib/modules/`uname -r`,
- * but do not error out yet if we fail to find it... */
- if (k_version) { /* uname succeedd */
- char *module_dir;
- char *tmdn;
- 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, ACTION_RECURSE,
- check_module_name_match, 0, m_fullName, 0);
- free(tmdn);
- }
-
- /* Check if we have found anything yet */
- if (!m_filename || ((fp = fopen(m_filename, "r")) == NULL)) {
- char module_dir[FILENAME_MAX];
-
- free(m_filename);
- m_filename = NULL;
- 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, ACTION_RECURSE,
- check_module_name_match, 0, m_fullName, 0)
- ) {
- if (m_filename == 0
- || ((fp = fopen(m_filename, "r")) == NULL)
- ) {
- bb_error_msg("%s: module not found", m_fullName);
- goto out;
- }
- } else
- bb_error_msg_and_die("%s: module not found", m_fullName);
- }
- } else
- m_filename = xstrdup(arg1);
-
- if (flag_verbose)
- printf("Using %s\n", m_filename);
-
-#if ENABLE_FEATURE_2_6_MODULES
- if (k_version > 4) {
- argv[optind] = m_filename;
- optind--;
- return insmod_ng_main(argc - optind, argv + optind);
- }
-#endif
-
- f = obj_load(fp, LOADBITS);
- if (f == NULL)
- bb_perror_msg_and_die("cannot load the module");
-
- if (get_modinfo_value(f, "kernel_version") == NULL)
- m_has_modinfo = 0;
- else
- m_has_modinfo = 1;
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
- /* Version correspondence? */
- if (!flag_quiet) {
- if (uname(&uts_info) < 0)
- uts_info.release[0] = '\0';
- if (m_has_modinfo) {
- m_version = new_get_module_version(f, m_strversion);
- if (m_version == -1) {
- bb_error_msg("cannot find the kernel version the module was "
- "compiled for");
- goto out;
- }
- }
-
- if (strncmp(uts_info.release, m_strversion, STRVERSIONLEN) != 0) {
- bb_error_msg("%skernel-module version mismatch\n"
- "\t%s was compiled for kernel version %s\n"
- "\twhile this kernel is version %s",
- flag_force_load ? "warning: " : "",
- m_filename, m_strversion, uts_info.release);
- if (!flag_force_load)
- goto out;
- }
- }
- k_crcs = 0;
-#endif /* FEATURE_INSMOD_VERSION_CHECKING */
-
- if (!query_module(NULL, 0, NULL, 0, NULL)) {
- if (!new_get_kernel_symbols())
- goto out;
- k_crcs = new_is_kernel_checksummed();
- } else {
- bb_error_msg("not configured to support old kernels");
- goto out;
- }
-
-#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
- m_crcs = 0;
- if (m_has_modinfo)
- m_crcs = new_is_module_checksummed(f);
-
- if (m_crcs != k_crcs)
- obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash);
-#endif /* FEATURE_INSMOD_VERSION_CHECKING */
-
- /* Let the module know about the kernel symbols. */
- add_kernel_symbols(f);
-
- /* Allocate common symbols, symbol tables, and string tables. */
-
- if (!new_create_this_module(f, m_name)) {
- 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 (!new_process_module_arguments(f, argc - optind, argv + optind)) {
- goto out;
- }
- }
-
- arch_create_got(f);
- hide_special_symbols(f);
-
-#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
- add_ksymoops_symbols(f, m_filename, m_name);
-#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
-
- new_create_module_ksymtab(f);
-
- /* Find current size of the module */
- m_size = obj_load_size(f);
-
-
- m_addr = create_module(m_name, m_size);
- if (m_addr == -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
+#include "libbb.h"
+#include "modutils.h"
+
+/* 2.6 style insmod has no options and required filename
+ * (not module name - .ko can't be omitted) */
+
+//usage:#if !ENABLE_MODPROBE_SMALL
+//usage:#define insmod_trivial_usage
+//usage: IF_FEATURE_2_4_MODULES("[OPTIONS] MODULE")
+//usage: IF_NOT_FEATURE_2_4_MODULES("FILE")
+//usage: IF_FEATURE_CMDLINE_MODULE_OPTIONS(" [SYMBOL=VALUE]...")
+//usage:#define insmod_full_usage "\n\n"
+//usage: "Load kernel module"
+//usage: IF_FEATURE_2_4_MODULES( "\n"
+//usage: "\n -f Force module to load into the wrong kernel version"
+//usage: "\n -k Make module autoclean-able"
+//usage: "\n -v Verbose"
+//usage: "\n -q Quiet"
+//usage: "\n -L Lock: prevent simultaneous loads"
+//usage: IF_FEATURE_INSMOD_LOAD_MAP(
+//usage: "\n -m Output load map to stdout"
+//usage: )
+//usage: "\n -x Don't export externs"
+//usage: )
+//usage:#endif
+
+int insmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int insmod_main(int argc UNUSED_PARAM, char **argv)
+{
+ char *filename;
+ int rc;
+
+ /* 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.
*/
- 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 (!new_init_module(m_name, f, m_size)) {
- delete_module(m_name);
- goto out;
- }
-
- if (flag_print_load_map)
- print_load_map(f);
- exit_status = EXIT_SUCCESS;
-
-out:
-#if ENABLE_FEATURE_CLEAN_UP
- if (fp)
- fclose(fp);
- free(tmp1);
- if (!tmp1)
- free(m_name);
- free(m_filename);
-#endif
- return exit_status;
-}
-
-
-#endif
-
-
-#if ENABLE_FEATURE_2_6_MODULES
-
-#include <sys/mman.h>
-#include <asm/unistd.h>
-#include <sys/syscall.h>
-
-/* We use error numbers in a loose translation... */
-static const char *moderror(int err)
-{
- switch (err) {
- case ENOEXEC:
- return "Invalid module format";
- case ENOENT:
- return "Unknown symbol in module";
- case ESRCH:
- return "Module has wrong symbol version";
- case EINVAL:
- return "Invalid parameters";
- default:
- return strerror(err);
- }
-}
-
-int insmod_ng_main(int argc, char **argv);
-int insmod_ng_main(int argc, char **argv)
-{
- long ret;
- size_t len;
- int optlen;
- void *map;
- char *filename, *options;
+ IF_FEATURE_2_4_MODULES(
+ getopt32(argv, INSMOD_OPTS INSMOD_ARGS);
+ argv += optind - 1;
+ );
filename = *++argv;
if (!filename)
bb_show_usage();
- /* Rest is options */
- options = xzalloc(1);
- optlen = 0;
- while (*++argv) {
- options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
- /* Spaces handled by "" pairs, but no way of escaping quotes */
- optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
- }
+ rc = bb_init_module(filename, parse_cmdline_module_options(argv, /*quote_spaces:*/ 0));
+ if (rc)
+ bb_error_msg("can't insert '%s': %s", filename, moderror(rc));
-#if 0
- /* Any special reason why mmap? It isn't performace critical... */
- int fd;
- struct stat st;
- unsigned long len;
- fd = xopen(filename, O_RDONLY);
- fstat(fd, &st);
- len = st.st_size;
- map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
- if (map == MAP_FAILED) {
- bb_perror_msg_and_die("cannot mmap '%s'", filename);
- }
-
- /* map == NULL on Blackfin, probably on other MMU-less systems too. Workaround. */
- if (map == NULL) {
- map = xmalloc(len);
- xread(fd, map, len);
- }
-#else
- len = MAXINT(ssize_t);
- map = xmalloc_open_read_close(filename, &len);
-#endif
-
- ret = syscall(__NR_init_module, map, len, options);
- if (ret != 0) {
- bb_perror_msg_and_die("cannot insert '%s': %s (%li)",
- filename, moderror(errno), ret);
- }
-
- return 0;
+ return rc;
}
-
-#endif
projects / oweals / busybox.git / blobdiff