[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini insmod implementation for busybox
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| 4 | *
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| 5 | * This version of insmod supports ARM, CRIS, H8/300, x86, ia64, x86_64,
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| 6 | * m68k, MIPS, PowerPC, S390, SH3/4/5, Sparc, v850e, and x86_64.
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| 7 | *
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| 8 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 9 | * and Ron Alder <alder@lineo.com>
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| 10 | *
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| 11 | * Rodney Radford <rradford@mindspring.com> 17-Aug-2004.
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| 12 | * Added x86_64 support.
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| 13 | *
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| 14 | * Miles Bader <miles@gnu.org> added NEC V850E support.
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| 15 | *
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| 16 | * Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4
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| 17 | * and (theoretically) SH3. I have only tested SH4 in little endian mode.
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| 18 | *
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| 19 | * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
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| 20 | * Nicolas Ferre <nicolas.ferre@alcove.fr> to support ARM7TDMI. Only
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| 21 | * very minor changes required to also work with StrongArm and presumably
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| 22 | * all ARM based systems.
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| 23 | *
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| 24 | * Yoshinori Sato <ysato@users.sourceforge.jp> 19-May-2004.
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| 25 | * added Renesas H8/300 support.
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| 26 | *
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| 27 | * Paul Mundt <lethal@linux-sh.org> 08-Aug-2003.
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| 28 | * Integrated support for sh64 (SH-5), from preliminary modutils
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| 29 | * patches from Benedict Gaster <benedict.gaster@superh.com>.
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| 30 | * Currently limited to support for 32bit ABI.
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| 31 | *
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| 32 | * Magnus Damm <damm@opensource.se> 22-May-2002.
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| 33 | * The plt and got code are now using the same structs.
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| 34 | * Added generic linked list code to fully support PowerPC.
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| 35 | * Replaced the mess in arch_apply_relocation() with architecture blocks.
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| 36 | * The arch_create_got() function got cleaned up with architecture blocks.
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| 37 | * These blocks should be easy maintain and sync with obj_xxx.c in modutils.
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| 38 | *
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| 39 | * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001.
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| 40 | * PowerPC specific code stolen from modutils-2.3.16,
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| 41 | * written by Paul Mackerras, Copyright 1996, 1997 Linux International.
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| 42 | * I've only tested the code on mpc8xx platforms in big-endian mode.
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[1765] | 43 | * Did some cleanup and added USE_xxx_ENTRIES...
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[821] | 44 | *
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| 45 | * Quinn Jensen <jensenq@lineo.com> added MIPS support 23-Feb-2001.
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| 46 | * based on modutils-2.4.2
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| 47 | * MIPS specific support for Elf loading and relocation.
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| 48 | * Copyright 1996, 1997 Linux International.
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| 49 | * Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu>
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| 50 | *
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| 51 | * Based almost entirely on the Linux modutils-2.3.11 implementation.
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| 52 | * Copyright 1996, 1997 Linux International.
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| 53 | * New implementation contributed by Richard Henderson <rth@tamu.edu>
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| 54 | * Based on original work by Bjorn Ekwall <bj0rn@blox.se>
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| 55 | * Restructured (and partly rewritten) by:
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| 56 | * Björn Ekwall <bj0rn@blox.se> February 1999
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| 57 | *
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| 58 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 59 | */
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| 60 |
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[1765] | 61 | #include "libbb.h"
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| 62 | #include <libgen.h>
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[821] | 63 | #include <sys/utsname.h>
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| 64 |
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[1765] | 65 | #if !ENABLE_FEATURE_2_4_MODULES && !ENABLE_FEATURE_2_6_MODULES
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| 66 | #undef ENABLE_FEATURE_2_4_MODULES
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| 67 | #define ENABLE_FEATURE_2_4_MODULES 1
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[821] | 68 | #endif
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| 69 |
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[1765] | 70 | #if !ENABLE_FEATURE_2_4_MODULES
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[821] | 71 | #define insmod_ng_main insmod_main
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| 72 | #endif
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| 73 |
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[1765] | 74 | #if ENABLE_FEATURE_2_6_MODULES
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[821] | 75 | extern int insmod_ng_main( int argc, char **argv);
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| 76 | #endif
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| 77 |
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| 78 |
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[1765] | 79 | #if ENABLE_FEATURE_2_4_MODULES
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[821] | 80 |
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| 81 |
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[1765] | 82 | #if ENABLE_FEATURE_INSMOD_LOADINKMEM
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[821] | 83 | #define LOADBITS 0
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| 84 | #else
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| 85 | #define LOADBITS 1
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| 86 | #endif
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| 87 |
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| 88 |
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| 89 | /* Alpha */
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| 90 | #if defined(__alpha__)
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| 91 | #define MATCH_MACHINE(x) (x == EM_ALPHA)
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| 92 | #define SHT_RELM SHT_RELA
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| 93 | #define Elf64_RelM Elf64_Rela
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| 94 | #define ELFCLASSM ELFCLASS64
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| 95 | #endif
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| 96 |
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| 97 | /* ARM support */
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| 98 | #if defined(__arm__)
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| 99 | #define MATCH_MACHINE(x) (x == EM_ARM)
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| 100 | #define SHT_RELM SHT_REL
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| 101 | #define Elf32_RelM Elf32_Rel
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| 102 | #define ELFCLASSM ELFCLASS32
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[1765] | 103 | #define USE_PLT_ENTRIES
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| 104 | #define PLT_ENTRY_SIZE 8
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| 105 | #define USE_GOT_ENTRIES
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| 106 | #define GOT_ENTRY_SIZE 8
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| 107 | #define USE_SINGLE
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[821] | 108 | #endif
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| 109 |
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| 110 | /* blackfin */
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| 111 | #if defined(BFIN)
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| 112 | #define MATCH_MACHINE(x) (x == EM_BLACKFIN)
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| 113 | #define SHT_RELM SHT_RELA
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| 114 | #define Elf32_RelM Elf32_Rela
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| 115 | #define ELFCLASSM ELFCLASS32
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| 116 | #endif
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| 117 |
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| 118 | /* CRIS */
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| 119 | #if defined(__cris__)
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| 120 | #define MATCH_MACHINE(x) (x == EM_CRIS)
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| 121 | #define SHT_RELM SHT_RELA
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| 122 | #define Elf32_RelM Elf32_Rela
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| 123 | #define ELFCLASSM ELFCLASS32
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| 124 | #ifndef EM_CRIS
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| 125 | #define EM_CRIS 76
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| 126 | #define R_CRIS_NONE 0
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| 127 | #define R_CRIS_32 3
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| 128 | #endif
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| 129 | #endif
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| 130 |
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| 131 | /* H8/300 */
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| 132 | #if defined(__H8300H__) || defined(__H8300S__)
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| 133 | #define MATCH_MACHINE(x) (x == EM_H8_300)
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| 134 | #define SHT_RELM SHT_RELA
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| 135 | #define Elf32_RelM Elf32_Rela
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| 136 | #define ELFCLASSM ELFCLASS32
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[1765] | 137 | #define USE_SINGLE
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[821] | 138 | #define SYMBOL_PREFIX "_"
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| 139 | #endif
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| 140 |
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| 141 | /* PA-RISC / HP-PA */
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| 142 | #if defined(__hppa__)
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| 143 | #define MATCH_MACHINE(x) (x == EM_PARISC)
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| 144 | #define SHT_RELM SHT_RELA
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| 145 | #if defined(__LP64__)
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| 146 | #define Elf64_RelM Elf64_Rela
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| 147 | #define ELFCLASSM ELFCLASS64
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| 148 | #else
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| 149 | #define Elf32_RelM Elf32_Rela
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| 150 | #define ELFCLASSM ELFCLASS32
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| 151 | #endif
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| 152 | #endif
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| 153 |
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| 154 | /* x86 */
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| 155 | #if defined(__i386__)
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| 156 | #ifndef EM_486
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| 157 | #define MATCH_MACHINE(x) (x == EM_386)
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| 158 | #else
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| 159 | #define MATCH_MACHINE(x) (x == EM_386 || x == EM_486)
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| 160 | #endif
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| 161 | #define SHT_RELM SHT_REL
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| 162 | #define Elf32_RelM Elf32_Rel
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| 163 | #define ELFCLASSM ELFCLASS32
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[1765] | 164 | #define USE_GOT_ENTRIES
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| 165 | #define GOT_ENTRY_SIZE 4
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| 166 | #define USE_SINGLE
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[821] | 167 | #endif
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| 168 |
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| 169 | /* IA64, aka Itanium */
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| 170 | #if defined(__ia64__)
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| 171 | #define MATCH_MACHINE(x) (x == EM_IA_64)
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| 172 | #define SHT_RELM SHT_RELA
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| 173 | #define Elf64_RelM Elf64_Rela
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| 174 | #define ELFCLASSM ELFCLASS64
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| 175 | #endif
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| 176 |
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| 177 | /* m68k */
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| 178 | #if defined(__mc68000__)
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| 179 | #define MATCH_MACHINE(x) (x == EM_68K)
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| 180 | #define SHT_RELM SHT_RELA
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| 181 | #define Elf32_RelM Elf32_Rela
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| 182 | #define ELFCLASSM ELFCLASS32
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[1765] | 183 | #define USE_GOT_ENTRIES
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| 184 | #define GOT_ENTRY_SIZE 4
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| 185 | #define USE_SINGLE
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[821] | 186 | #endif
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| 187 |
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| 188 | /* Microblaze */
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| 189 | #if defined(__microblaze__)
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[1765] | 190 | #define USE_SINGLE
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[821] | 191 | #define MATCH_MACHINE(x) (x == EM_XILINX_MICROBLAZE)
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| 192 | #define SHT_RELM SHT_RELA
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| 193 | #define Elf32_RelM Elf32_Rela
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| 194 | #define ELFCLASSM ELFCLASS32
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| 195 | #endif
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| 196 |
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| 197 | /* MIPS */
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| 198 | #if defined(__mips__)
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| 199 | #define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE)
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| 200 | #define SHT_RELM SHT_REL
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| 201 | #define Elf32_RelM Elf32_Rel
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| 202 | #define ELFCLASSM ELFCLASS32
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| 203 | /* Account for ELF spec changes. */
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| 204 | #ifndef EM_MIPS_RS3_LE
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| 205 | #ifdef EM_MIPS_RS4_BE
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| 206 | #define EM_MIPS_RS3_LE EM_MIPS_RS4_BE
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| 207 | #else
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| 208 | #define EM_MIPS_RS3_LE 10
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| 209 | #endif
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| 210 | #endif /* !EM_MIPS_RS3_LE */
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| 211 | #define ARCHDATAM "__dbe_table"
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| 212 | #endif
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| 213 |
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| 214 | /* Nios II */
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| 215 | #if defined(__nios2__)
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| 216 | #define MATCH_MACHINE(x) (x == EM_ALTERA_NIOS2)
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| 217 | #define SHT_RELM SHT_RELA
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| 218 | #define Elf32_RelM Elf32_Rela
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| 219 | #define ELFCLASSM ELFCLASS32
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| 220 | #endif
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| 221 |
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| 222 | /* PowerPC */
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| 223 | #if defined(__powerpc64__)
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| 224 | #define MATCH_MACHINE(x) (x == EM_PPC64)
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| 225 | #define SHT_RELM SHT_RELA
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| 226 | #define Elf64_RelM Elf64_Rela
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| 227 | #define ELFCLASSM ELFCLASS64
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| 228 | #elif defined(__powerpc__)
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| 229 | #define MATCH_MACHINE(x) (x == EM_PPC)
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| 230 | #define SHT_RELM SHT_RELA
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| 231 | #define Elf32_RelM Elf32_Rela
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| 232 | #define ELFCLASSM ELFCLASS32
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[1765] | 233 | #define USE_PLT_ENTRIES
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| 234 | #define PLT_ENTRY_SIZE 16
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| 235 | #define USE_PLT_LIST
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| 236 | #define LIST_ARCHTYPE ElfW(Addr)
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| 237 | #define USE_LIST
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[821] | 238 | #define ARCHDATAM "__ftr_fixup"
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| 239 | #endif
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| 240 |
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| 241 | /* S390 */
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| 242 | #if defined(__s390__)
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| 243 | #define MATCH_MACHINE(x) (x == EM_S390)
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| 244 | #define SHT_RELM SHT_RELA
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| 245 | #define Elf32_RelM Elf32_Rela
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| 246 | #define ELFCLASSM ELFCLASS32
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[1765] | 247 | #define USE_PLT_ENTRIES
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| 248 | #define PLT_ENTRY_SIZE 8
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| 249 | #define USE_GOT_ENTRIES
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| 250 | #define GOT_ENTRY_SIZE 8
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| 251 | #define USE_SINGLE
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[821] | 252 | #endif
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| 253 |
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| 254 | /* SuperH */
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| 255 | #if defined(__sh__)
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| 256 | #define MATCH_MACHINE(x) (x == EM_SH)
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| 257 | #define SHT_RELM SHT_RELA
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| 258 | #define Elf32_RelM Elf32_Rela
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| 259 | #define ELFCLASSM ELFCLASS32
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[1765] | 260 | #define USE_GOT_ENTRIES
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| 261 | #define GOT_ENTRY_SIZE 4
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| 262 | #define USE_SINGLE
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[821] | 263 | /* the SH changes have only been tested in =little endian= mode */
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| 264 | /* I'm not sure about big endian, so let's warn: */
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| 265 | #if defined(__sh__) && BB_BIG_ENDIAN
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| 266 | # error insmod.c may require changes for use on big endian SH
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| 267 | #endif
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| 268 | /* it may or may not work on the SH1/SH2... Error on those also */
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| 269 | #if ((!(defined(__SH3__) || defined(__SH4__) || defined(__SH5__)))) && (defined(__sh__))
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| 270 | #error insmod.c may require changes for SH1 or SH2 use
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| 271 | #endif
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| 272 | #endif
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| 273 |
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| 274 | /* Sparc */
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| 275 | #if defined(__sparc__)
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| 276 | #define MATCH_MACHINE(x) (x == EM_SPARC)
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| 277 | #define SHT_RELM SHT_RELA
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| 278 | #define Elf32_RelM Elf32_Rela
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| 279 | #define ELFCLASSM ELFCLASS32
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| 280 | #endif
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| 281 |
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| 282 | /* v850e */
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[1765] | 283 | #if defined(__v850e__)
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[821] | 284 | #define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850)
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| 285 | #define SHT_RELM SHT_RELA
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| 286 | #define Elf32_RelM Elf32_Rela
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| 287 | #define ELFCLASSM ELFCLASS32
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[1765] | 288 | #define USE_PLT_ENTRIES
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| 289 | #define PLT_ENTRY_SIZE 8
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| 290 | #define USE_SINGLE
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[821] | 291 | #ifndef EM_CYGNUS_V850 /* grumble */
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| 292 | #define EM_CYGNUS_V850 0x9080
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| 293 | #endif
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| 294 | #define SYMBOL_PREFIX "_"
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| 295 | #endif
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| 296 |
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| 297 | /* X86_64 */
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| 298 | #if defined(__x86_64__)
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| 299 | #define MATCH_MACHINE(x) (x == EM_X86_64)
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| 300 | #define SHT_RELM SHT_RELA
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[1765] | 301 | #define USE_GOT_ENTRIES
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| 302 | #define GOT_ENTRY_SIZE 8
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| 303 | #define USE_SINGLE
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[821] | 304 | #define Elf64_RelM Elf64_Rela
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| 305 | #define ELFCLASSM ELFCLASS64
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| 306 | #endif
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| 307 |
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| 308 | #ifndef SHT_RELM
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| 309 | #error Sorry, but insmod.c does not yet support this architecture...
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| 310 | #endif
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| 311 |
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| 312 |
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| 313 | //----------------------------------------------------------------------------
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| 314 | //--------modutils module.h, lines 45-242
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| 315 | //----------------------------------------------------------------------------
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| 316 |
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| 317 | /* Definitions for the Linux module syscall interface.
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| 318 | Copyright 1996, 1997 Linux International.
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| 319 |
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| 320 | Contributed by Richard Henderson <rth@tamu.edu>
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| 321 |
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| 322 | This file is part of the Linux modutils.
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| 323 |
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| 324 | This program is free software; you can redistribute it and/or modify it
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| 325 | under the terms of the GNU General Public License as published by the
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| 326 | Free Software Foundation; either version 2 of the License, or (at your
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| 327 | option) any later version.
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| 328 |
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| 329 | This program is distributed in the hope that it will be useful, but
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| 330 | WITHOUT ANY WARRANTY; without even the implied warranty of
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| 331 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 332 | General Public License for more details.
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| 333 |
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| 334 | You should have received a copy of the GNU General Public License
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| 335 | along with this program; if not, write to the Free Software Foundation,
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| 336 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 337 |
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| 338 |
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| 339 | #ifndef MODUTILS_MODULE_H
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| 340 |
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| 341 | /*======================================================================*/
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| 342 | /* For sizeof() which are related to the module platform and not to the
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| 343 | environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */
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| 344 |
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| 345 | #define tgt_sizeof_char sizeof(char)
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| 346 | #define tgt_sizeof_short sizeof(short)
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| 347 | #define tgt_sizeof_int sizeof(int)
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| 348 | #define tgt_sizeof_long sizeof(long)
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| 349 | #define tgt_sizeof_char_p sizeof(char *)
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| 350 | #define tgt_sizeof_void_p sizeof(void *)
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| 351 | #define tgt_long long
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| 352 |
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| 353 | #if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64)
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| 354 | #undef tgt_sizeof_long
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| 355 | #undef tgt_sizeof_char_p
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| 356 | #undef tgt_sizeof_void_p
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| 357 | #undef tgt_long
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| 358 | enum {
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| 359 | tgt_sizeof_long = 8,
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| 360 | tgt_sizeof_char_p = 8,
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| 361 | tgt_sizeof_void_p = 8
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| 362 | };
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| 363 | #define tgt_long long long
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| 364 | #endif
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| 365 |
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| 366 | /*======================================================================*/
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| 367 | /* The structures used in Linux 2.1. */
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| 368 |
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| 369 | /* Note: new_module_symbol does not use tgt_long intentionally */
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[1765] | 370 | struct new_module_symbol {
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[821] | 371 | unsigned long value;
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| 372 | unsigned long name;
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| 373 | };
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| 374 |
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| 375 | struct new_module_persist;
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| 376 |
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[1765] | 377 | struct new_module_ref {
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[821] | 378 | unsigned tgt_long dep; /* kernel addresses */
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| 379 | unsigned tgt_long ref;
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| 380 | unsigned tgt_long next_ref;
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| 381 | };
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| 382 |
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[1765] | 383 | struct new_module {
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[821] | 384 | unsigned tgt_long size_of_struct; /* == sizeof(module) */
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| 385 | unsigned tgt_long next;
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| 386 | unsigned tgt_long name;
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| 387 | unsigned tgt_long size;
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| 388 |
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| 389 | tgt_long usecount;
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| 390 | unsigned tgt_long flags; /* AUTOCLEAN et al */
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| 391 |
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| 392 | unsigned nsyms;
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| 393 | unsigned ndeps;
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| 394 |
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| 395 | unsigned tgt_long syms;
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| 396 | unsigned tgt_long deps;
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| 397 | unsigned tgt_long refs;
|
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| 398 | unsigned tgt_long init;
|
---|
| 399 | unsigned tgt_long cleanup;
|
---|
| 400 | unsigned tgt_long ex_table_start;
|
---|
| 401 | unsigned tgt_long ex_table_end;
|
---|
| 402 | #ifdef __alpha__
|
---|
| 403 | unsigned tgt_long gp;
|
---|
| 404 | #endif
|
---|
| 405 | /* Everything after here is extension. */
|
---|
| 406 | unsigned tgt_long persist_start;
|
---|
| 407 | unsigned tgt_long persist_end;
|
---|
| 408 | unsigned tgt_long can_unload;
|
---|
| 409 | unsigned tgt_long runsize;
|
---|
| 410 | const char *kallsyms_start; /* All symbols for kernel debugging */
|
---|
| 411 | const char *kallsyms_end;
|
---|
| 412 | const char *archdata_start; /* arch specific data for module */
|
---|
| 413 | const char *archdata_end;
|
---|
| 414 | const char *kernel_data; /* Reserved for kernel internal use */
|
---|
| 415 | };
|
---|
| 416 |
|
---|
| 417 | #ifdef ARCHDATAM
|
---|
| 418 | #define ARCHDATA_SEC_NAME ARCHDATAM
|
---|
| 419 | #else
|
---|
| 420 | #define ARCHDATA_SEC_NAME "__archdata"
|
---|
| 421 | #endif
|
---|
| 422 | #define KALLSYMS_SEC_NAME "__kallsyms"
|
---|
| 423 |
|
---|
| 424 |
|
---|
[1765] | 425 | struct new_module_info {
|
---|
[821] | 426 | unsigned long addr;
|
---|
| 427 | unsigned long size;
|
---|
| 428 | unsigned long flags;
|
---|
| 429 | long usecount;
|
---|
| 430 | };
|
---|
| 431 |
|
---|
| 432 | /* Bits of module.flags. */
|
---|
| 433 | enum {
|
---|
| 434 | NEW_MOD_RUNNING = 1,
|
---|
| 435 | NEW_MOD_DELETED = 2,
|
---|
| 436 | NEW_MOD_AUTOCLEAN = 4,
|
---|
| 437 | NEW_MOD_VISITED = 8,
|
---|
| 438 | NEW_MOD_USED_ONCE = 16
|
---|
| 439 | };
|
---|
| 440 |
|
---|
| 441 | int init_module(const char *name, const struct new_module *);
|
---|
| 442 | int query_module(const char *name, int which, void *buf,
|
---|
| 443 | size_t bufsize, size_t *ret);
|
---|
| 444 |
|
---|
| 445 | /* Values for query_module's which. */
|
---|
| 446 | enum {
|
---|
| 447 | QM_MODULES = 1,
|
---|
| 448 | QM_DEPS = 2,
|
---|
| 449 | QM_REFS = 3,
|
---|
| 450 | QM_SYMBOLS = 4,
|
---|
| 451 | QM_INFO = 5
|
---|
| 452 | };
|
---|
| 453 |
|
---|
| 454 | /*======================================================================*/
|
---|
| 455 | /* The system calls unchanged between 2.0 and 2.1. */
|
---|
| 456 |
|
---|
| 457 | unsigned long create_module(const char *, size_t);
|
---|
| 458 | int delete_module(const char *);
|
---|
| 459 |
|
---|
| 460 |
|
---|
| 461 | #endif /* module.h */
|
---|
| 462 |
|
---|
| 463 | //----------------------------------------------------------------------------
|
---|
| 464 | //--------end of modutils module.h
|
---|
| 465 | //----------------------------------------------------------------------------
|
---|
| 466 |
|
---|
| 467 |
|
---|
| 468 |
|
---|
| 469 | //----------------------------------------------------------------------------
|
---|
| 470 | //--------modutils obj.h, lines 253-462
|
---|
| 471 | //----------------------------------------------------------------------------
|
---|
| 472 |
|
---|
| 473 | /* Elf object file loading and relocation routines.
|
---|
| 474 | Copyright 1996, 1997 Linux International.
|
---|
| 475 |
|
---|
| 476 | Contributed by Richard Henderson <rth@tamu.edu>
|
---|
| 477 |
|
---|
| 478 | This file is part of the Linux modutils.
|
---|
| 479 |
|
---|
| 480 | This program is free software; you can redistribute it and/or modify it
|
---|
| 481 | under the terms of the GNU General Public License as published by the
|
---|
| 482 | Free Software Foundation; either version 2 of the License, or (at your
|
---|
| 483 | option) any later version.
|
---|
| 484 |
|
---|
| 485 | This program is distributed in the hope that it will be useful, but
|
---|
| 486 | WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 487 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
---|
| 488 | General Public License for more details.
|
---|
| 489 |
|
---|
| 490 | You should have received a copy of the GNU General Public License
|
---|
| 491 | along with this program; if not, write to the Free Software Foundation,
|
---|
| 492 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
---|
| 493 |
|
---|
| 494 |
|
---|
| 495 | #ifndef MODUTILS_OBJ_H
|
---|
| 496 |
|
---|
| 497 | /* The relocatable object is manipulated using elfin types. */
|
---|
| 498 |
|
---|
| 499 | #include <elf.h>
|
---|
| 500 | #include <endian.h>
|
---|
| 501 |
|
---|
| 502 | #ifndef ElfW
|
---|
| 503 | # if ELFCLASSM == ELFCLASS32
|
---|
| 504 | # define ElfW(x) Elf32_ ## x
|
---|
| 505 | # define ELFW(x) ELF32_ ## x
|
---|
| 506 | # else
|
---|
| 507 | # define ElfW(x) Elf64_ ## x
|
---|
| 508 | # define ELFW(x) ELF64_ ## x
|
---|
| 509 | # endif
|
---|
| 510 | #endif
|
---|
| 511 |
|
---|
| 512 | /* For some reason this is missing from some ancient C libraries.... */
|
---|
| 513 | #ifndef ELF32_ST_INFO
|
---|
| 514 | # define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
|
---|
| 515 | #endif
|
---|
| 516 |
|
---|
| 517 | #ifndef ELF64_ST_INFO
|
---|
| 518 | # define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
|
---|
| 519 | #endif
|
---|
| 520 |
|
---|
| 521 | #define ELF_ST_BIND(info) ELFW(ST_BIND)(info)
|
---|
| 522 | #define ELF_ST_TYPE(info) ELFW(ST_TYPE)(info)
|
---|
| 523 | #define ELF_ST_INFO(bind, type) ELFW(ST_INFO)(bind, type)
|
---|
| 524 | #define ELF_R_TYPE(val) ELFW(R_TYPE)(val)
|
---|
| 525 | #define ELF_R_SYM(val) ELFW(R_SYM)(val)
|
---|
| 526 |
|
---|
| 527 | struct obj_string_patch;
|
---|
| 528 | struct obj_symbol_patch;
|
---|
| 529 |
|
---|
| 530 | struct obj_section
|
---|
| 531 | {
|
---|
| 532 | ElfW(Shdr) header;
|
---|
| 533 | const char *name;
|
---|
| 534 | char *contents;
|
---|
| 535 | struct obj_section *load_next;
|
---|
| 536 | int idx;
|
---|
| 537 | };
|
---|
| 538 |
|
---|
| 539 | struct obj_symbol
|
---|
| 540 | {
|
---|
| 541 | struct obj_symbol *next; /* hash table link */
|
---|
| 542 | const char *name;
|
---|
| 543 | unsigned long value;
|
---|
| 544 | unsigned long size;
|
---|
| 545 | int secidx; /* the defining section index/module */
|
---|
| 546 | int info;
|
---|
| 547 | int ksymidx; /* for export to the kernel symtab */
|
---|
| 548 | int referenced; /* actually used in the link */
|
---|
| 549 | };
|
---|
| 550 |
|
---|
| 551 | /* Hardcode the hash table size. We shouldn't be needing so many
|
---|
| 552 | symbols that we begin to degrade performance, and we get a big win
|
---|
| 553 | by giving the compiler a constant divisor. */
|
---|
| 554 |
|
---|
| 555 | #define HASH_BUCKETS 521
|
---|
| 556 |
|
---|
[1765] | 557 | struct obj_file {
|
---|
[821] | 558 | ElfW(Ehdr) header;
|
---|
| 559 | ElfW(Addr) baseaddr;
|
---|
| 560 | struct obj_section **sections;
|
---|
| 561 | struct obj_section *load_order;
|
---|
| 562 | struct obj_section **load_order_search_start;
|
---|
| 563 | struct obj_string_patch *string_patches;
|
---|
| 564 | struct obj_symbol_patch *symbol_patches;
|
---|
| 565 | int (*symbol_cmp)(const char *, const char *);
|
---|
| 566 | unsigned long (*symbol_hash)(const char *);
|
---|
| 567 | unsigned long local_symtab_size;
|
---|
| 568 | struct obj_symbol **local_symtab;
|
---|
| 569 | struct obj_symbol *symtab[HASH_BUCKETS];
|
---|
| 570 | };
|
---|
| 571 |
|
---|
[1765] | 572 | enum obj_reloc {
|
---|
[821] | 573 | obj_reloc_ok,
|
---|
| 574 | obj_reloc_overflow,
|
---|
| 575 | obj_reloc_dangerous,
|
---|
| 576 | obj_reloc_unhandled
|
---|
| 577 | };
|
---|
| 578 |
|
---|
[1765] | 579 | struct obj_string_patch {
|
---|
[821] | 580 | struct obj_string_patch *next;
|
---|
| 581 | int reloc_secidx;
|
---|
| 582 | ElfW(Addr) reloc_offset;
|
---|
| 583 | ElfW(Addr) string_offset;
|
---|
| 584 | };
|
---|
| 585 |
|
---|
[1765] | 586 | struct obj_symbol_patch {
|
---|
[821] | 587 | struct obj_symbol_patch *next;
|
---|
| 588 | int reloc_secidx;
|
---|
| 589 | ElfW(Addr) reloc_offset;
|
---|
| 590 | struct obj_symbol *sym;
|
---|
| 591 | };
|
---|
| 592 |
|
---|
| 593 |
|
---|
| 594 | /* Generic object manipulation routines. */
|
---|
| 595 |
|
---|
| 596 | static unsigned long obj_elf_hash(const char *);
|
---|
| 597 |
|
---|
| 598 | static unsigned long obj_elf_hash_n(const char *, unsigned long len);
|
---|
| 599 |
|
---|
[1765] | 600 | static struct obj_symbol *obj_find_symbol(struct obj_file *f,
|
---|
[821] | 601 | const char *name);
|
---|
| 602 |
|
---|
| 603 | static ElfW(Addr) obj_symbol_final_value(struct obj_file *f,
|
---|
| 604 | struct obj_symbol *sym);
|
---|
| 605 |
|
---|
[1765] | 606 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
[821] | 607 | static void obj_set_symbol_compare(struct obj_file *f,
|
---|
| 608 | int (*cmp)(const char *, const char *),
|
---|
| 609 | unsigned long (*hash)(const char *));
|
---|
| 610 | #endif
|
---|
| 611 |
|
---|
[1765] | 612 | static struct obj_section *obj_find_section(struct obj_file *f,
|
---|
[821] | 613 | const char *name);
|
---|
| 614 |
|
---|
[1765] | 615 | static void obj_insert_section_load_order(struct obj_file *f,
|
---|
[821] | 616 | struct obj_section *sec);
|
---|
| 617 |
|
---|
[1765] | 618 | static struct obj_section *obj_create_alloced_section(struct obj_file *f,
|
---|
[821] | 619 | const char *name,
|
---|
| 620 | unsigned long align,
|
---|
| 621 | unsigned long size);
|
---|
| 622 |
|
---|
[1765] | 623 | static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
|
---|
[821] | 624 | const char *name,
|
---|
| 625 | unsigned long align,
|
---|
| 626 | unsigned long size);
|
---|
| 627 |
|
---|
[1765] | 628 | static void *obj_extend_section(struct obj_section *sec, unsigned long more);
|
---|
[821] | 629 |
|
---|
| 630 | static int obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
|
---|
| 631 | const char *string);
|
---|
| 632 |
|
---|
| 633 | static int obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
|
---|
| 634 | struct obj_symbol *sym);
|
---|
| 635 |
|
---|
| 636 | static int obj_check_undefineds(struct obj_file *f);
|
---|
| 637 |
|
---|
| 638 | static void obj_allocate_commons(struct obj_file *f);
|
---|
| 639 |
|
---|
[1765] | 640 | static unsigned long obj_load_size(struct obj_file *f);
|
---|
[821] | 641 |
|
---|
[1765] | 642 | static int obj_relocate(struct obj_file *f, ElfW(Addr) base);
|
---|
[821] | 643 |
|
---|
| 644 | static struct obj_file *obj_load(FILE *f, int loadprogbits);
|
---|
| 645 |
|
---|
[1765] | 646 | static int obj_create_image(struct obj_file *f, char *image);
|
---|
[821] | 647 |
|
---|
| 648 | /* Architecture specific manipulation routines. */
|
---|
| 649 |
|
---|
[1765] | 650 | static struct obj_file *arch_new_file(void);
|
---|
[821] | 651 |
|
---|
[1765] | 652 | static struct obj_section *arch_new_section(void);
|
---|
[821] | 653 |
|
---|
[1765] | 654 | static struct obj_symbol *arch_new_symbol(void);
|
---|
[821] | 655 |
|
---|
[1765] | 656 | static enum obj_reloc arch_apply_relocation(struct obj_file *f,
|
---|
[821] | 657 | struct obj_section *targsec,
|
---|
| 658 | struct obj_section *symsec,
|
---|
| 659 | struct obj_symbol *sym,
|
---|
| 660 | ElfW(RelM) *rel, ElfW(Addr) value);
|
---|
| 661 |
|
---|
[1765] | 662 | static void arch_create_got(struct obj_file *f);
|
---|
[821] | 663 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
|
---|
| 664 | static int obj_gpl_license(struct obj_file *f, const char **license);
|
---|
[1765] | 665 | #endif /* FEATURE_CHECK_TAINTED_MODULE */
|
---|
[821] | 666 | #endif /* obj.h */
|
---|
| 667 | //----------------------------------------------------------------------------
|
---|
| 668 | //--------end of modutils obj.h
|
---|
| 669 | //----------------------------------------------------------------------------
|
---|
| 670 |
|
---|
| 671 |
|
---|
| 672 | /* SPFX is always a string, so it can be concatenated to string constants. */
|
---|
| 673 | #ifdef SYMBOL_PREFIX
|
---|
| 674 | #define SPFX SYMBOL_PREFIX
|
---|
| 675 | #else
|
---|
| 676 | #define SPFX ""
|
---|
| 677 | #endif
|
---|
| 678 |
|
---|
| 679 |
|
---|
| 680 | #define _PATH_MODULES "/lib/modules"
|
---|
[1765] | 681 | enum { STRVERSIONLEN = 64 };
|
---|
[821] | 682 |
|
---|
| 683 | /*======================================================================*/
|
---|
| 684 |
|
---|
[1765] | 685 | #define OPTION_STR "sLo:fkvqx" USE_FEATURE_INSMOD_LOAD_MAP("m")
|
---|
| 686 | enum {
|
---|
| 687 | OPT_s = 0x1, // -s /* log to syslog */
|
---|
| 688 | /* Not supported but kernel needs this for request_module(),
|
---|
| 689 | as this calls: modprobe -k -s -- <module>
|
---|
| 690 | so silently ignore this flag */
|
---|
| 691 | OPT_L = 0x2, // -L /* Stub warning */
|
---|
| 692 | /* Compatibility with modprobe.
|
---|
| 693 | In theory, this does locking, but we don't do
|
---|
| 694 | that. So be careful and plan your life around not
|
---|
| 695 | loading the same module 50 times concurrently. */
|
---|
| 696 | OPT_o = 0x4, // -o /* name the output module */
|
---|
| 697 | OPT_f = 0x8, // -f /* force loading */
|
---|
| 698 | OPT_k = 0x10, // -k /* module loaded by kerneld, auto-cleanable */
|
---|
| 699 | OPT_v = 0x20, // -v /* verbose output */
|
---|
| 700 | OPT_q = 0x40, // -q /* silent */
|
---|
| 701 | OPT_x = 0x80, // -x /* do not export externs */
|
---|
| 702 | OPT_m = 0x100, // -m /* print module load map */
|
---|
| 703 | };
|
---|
| 704 | #define flag_force_load (option_mask32 & OPT_f)
|
---|
| 705 | #define flag_autoclean (option_mask32 & OPT_k)
|
---|
| 706 | #define flag_verbose (option_mask32 & OPT_v)
|
---|
| 707 | #define flag_quiet (option_mask32 & OPT_q)
|
---|
| 708 | #define flag_noexport (option_mask32 & OPT_x)
|
---|
| 709 | #if ENABLE_FEATURE_INSMOD_LOAD_MAP
|
---|
| 710 | #define flag_print_load_map (option_mask32 & OPT_m)
|
---|
| 711 | #else
|
---|
| 712 | #define flag_print_load_map 0
|
---|
| 713 | #endif
|
---|
[821] | 714 |
|
---|
| 715 | /*======================================================================*/
|
---|
| 716 |
|
---|
[1765] | 717 | #if defined(USE_LIST)
|
---|
[821] | 718 |
|
---|
| 719 | struct arch_list_entry
|
---|
| 720 | {
|
---|
| 721 | struct arch_list_entry *next;
|
---|
[1765] | 722 | LIST_ARCHTYPE addend;
|
---|
[821] | 723 | int offset;
|
---|
| 724 | int inited : 1;
|
---|
| 725 | };
|
---|
| 726 |
|
---|
| 727 | #endif
|
---|
| 728 |
|
---|
[1765] | 729 | #if defined(USE_SINGLE)
|
---|
[821] | 730 |
|
---|
| 731 | struct arch_single_entry
|
---|
| 732 | {
|
---|
| 733 | int offset;
|
---|
| 734 | int inited : 1;
|
---|
| 735 | int allocated : 1;
|
---|
| 736 | };
|
---|
| 737 |
|
---|
| 738 | #endif
|
---|
| 739 |
|
---|
| 740 | #if defined(__mips__)
|
---|
| 741 | struct mips_hi16
|
---|
| 742 | {
|
---|
| 743 | struct mips_hi16 *next;
|
---|
| 744 | ElfW(Addr) *addr;
|
---|
| 745 | ElfW(Addr) value;
|
---|
| 746 | };
|
---|
| 747 | #endif
|
---|
| 748 |
|
---|
| 749 | struct arch_file {
|
---|
| 750 | struct obj_file root;
|
---|
[1765] | 751 | #if defined(USE_PLT_ENTRIES)
|
---|
[821] | 752 | struct obj_section *plt;
|
---|
| 753 | #endif
|
---|
[1765] | 754 | #if defined(USE_GOT_ENTRIES)
|
---|
[821] | 755 | struct obj_section *got;
|
---|
| 756 | #endif
|
---|
| 757 | #if defined(__mips__)
|
---|
| 758 | struct mips_hi16 *mips_hi16_list;
|
---|
| 759 | #endif
|
---|
| 760 | };
|
---|
| 761 |
|
---|
| 762 | struct arch_symbol {
|
---|
| 763 | struct obj_symbol root;
|
---|
[1765] | 764 | #if defined(USE_PLT_ENTRIES)
|
---|
| 765 | #if defined(USE_PLT_LIST)
|
---|
[821] | 766 | struct arch_list_entry *pltent;
|
---|
| 767 | #else
|
---|
| 768 | struct arch_single_entry pltent;
|
---|
| 769 | #endif
|
---|
| 770 | #endif
|
---|
[1765] | 771 | #if defined(USE_GOT_ENTRIES)
|
---|
[821] | 772 | struct arch_single_entry gotent;
|
---|
| 773 | #endif
|
---|
| 774 | };
|
---|
| 775 |
|
---|
| 776 |
|
---|
| 777 | struct external_module {
|
---|
| 778 | const char *name;
|
---|
| 779 | ElfW(Addr) addr;
|
---|
| 780 | int used;
|
---|
| 781 | size_t nsyms;
|
---|
| 782 | struct new_module_symbol *syms;
|
---|
| 783 | };
|
---|
| 784 |
|
---|
| 785 | static struct new_module_symbol *ksyms;
|
---|
| 786 | static size_t nksyms;
|
---|
| 787 |
|
---|
| 788 | static struct external_module *ext_modules;
|
---|
| 789 | static int n_ext_modules;
|
---|
| 790 | static int n_ext_modules_used;
|
---|
| 791 | extern int delete_module(const char *);
|
---|
| 792 |
|
---|
| 793 | static char *m_filename;
|
---|
| 794 | static char *m_fullName;
|
---|
| 795 |
|
---|
| 796 |
|
---|
| 797 | /*======================================================================*/
|
---|
| 798 |
|
---|
| 799 |
|
---|
| 800 | static int check_module_name_match(const char *filename, struct stat *statbuf,
|
---|
[1765] | 801 | void *userdata, int depth)
|
---|
[821] | 802 | {
|
---|
| 803 | char *fullname = (char *) userdata;
|
---|
| 804 |
|
---|
| 805 | if (fullname[0] == '\0')
|
---|
[1765] | 806 | return FALSE;
|
---|
[821] | 807 | else {
|
---|
[1765] | 808 | char *tmp, *tmp1 = xstrdup(filename);
|
---|
[821] | 809 | tmp = bb_get_last_path_component(tmp1);
|
---|
| 810 | if (strcmp(tmp, fullname) == 0) {
|
---|
| 811 | free(tmp1);
|
---|
| 812 | /* Stop searching if we find a match */
|
---|
[1765] | 813 | m_filename = xstrdup(filename);
|
---|
| 814 | return FALSE;
|
---|
[821] | 815 | }
|
---|
| 816 | free(tmp1);
|
---|
| 817 | }
|
---|
[1765] | 818 | return TRUE;
|
---|
[821] | 819 | }
|
---|
| 820 |
|
---|
| 821 |
|
---|
| 822 | /*======================================================================*/
|
---|
| 823 |
|
---|
| 824 | static struct obj_file *arch_new_file(void)
|
---|
| 825 | {
|
---|
| 826 | struct arch_file *f;
|
---|
| 827 | f = xmalloc(sizeof(*f));
|
---|
| 828 |
|
---|
| 829 | memset(f, 0, sizeof(*f));
|
---|
| 830 |
|
---|
| 831 | return &f->root;
|
---|
| 832 | }
|
---|
| 833 |
|
---|
| 834 | static struct obj_section *arch_new_section(void)
|
---|
| 835 | {
|
---|
| 836 | return xmalloc(sizeof(struct obj_section));
|
---|
| 837 | }
|
---|
| 838 |
|
---|
| 839 | static struct obj_symbol *arch_new_symbol(void)
|
---|
| 840 | {
|
---|
| 841 | struct arch_symbol *sym;
|
---|
| 842 | sym = xmalloc(sizeof(*sym));
|
---|
| 843 |
|
---|
| 844 | memset(sym, 0, sizeof(*sym));
|
---|
| 845 |
|
---|
| 846 | return &sym->root;
|
---|
| 847 | }
|
---|
| 848 |
|
---|
| 849 | static enum obj_reloc
|
---|
| 850 | arch_apply_relocation(struct obj_file *f,
|
---|
[1765] | 851 | struct obj_section *targsec,
|
---|
| 852 | struct obj_section *symsec,
|
---|
| 853 | struct obj_symbol *sym,
|
---|
| 854 | ElfW(RelM) *rel, ElfW(Addr) v)
|
---|
[821] | 855 | {
|
---|
| 856 | struct arch_file *ifile = (struct arch_file *) f;
|
---|
| 857 | enum obj_reloc ret = obj_reloc_ok;
|
---|
| 858 | ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset);
|
---|
| 859 | ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset;
|
---|
[1765] | 860 | #if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
|
---|
[821] | 861 | struct arch_symbol *isym = (struct arch_symbol *) sym;
|
---|
| 862 | #endif
|
---|
| 863 | #if defined(__arm__) || defined(__i386__) || defined(__mc68000__) || defined(__sh__) || defined(__s390__)
|
---|
[1765] | 864 | #if defined(USE_GOT_ENTRIES)
|
---|
[821] | 865 | ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0;
|
---|
| 866 | #endif
|
---|
| 867 | #endif
|
---|
[1765] | 868 | #if defined(USE_PLT_ENTRIES)
|
---|
[821] | 869 | ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
|
---|
| 870 | unsigned long *ip;
|
---|
[1765] | 871 | # if defined(USE_PLT_LIST)
|
---|
[821] | 872 | struct arch_list_entry *pe;
|
---|
| 873 | # else
|
---|
| 874 | struct arch_single_entry *pe;
|
---|
| 875 | # endif
|
---|
| 876 | #endif
|
---|
| 877 |
|
---|
| 878 | switch (ELF_R_TYPE(rel->r_info)) {
|
---|
| 879 |
|
---|
| 880 | #if defined(__arm__)
|
---|
| 881 |
|
---|
| 882 | case R_ARM_NONE:
|
---|
| 883 | break;
|
---|
| 884 |
|
---|
| 885 | case R_ARM_ABS32:
|
---|
| 886 | *loc += v;
|
---|
| 887 | break;
|
---|
| 888 |
|
---|
| 889 | case R_ARM_GOT32:
|
---|
| 890 | goto bb_use_got;
|
---|
| 891 |
|
---|
| 892 | case R_ARM_GOTPC:
|
---|
| 893 | /* relative reloc, always to _GLOBAL_OFFSET_TABLE_
|
---|
| 894 | * (which is .got) similar to branch,
|
---|
| 895 | * but is full 32 bits relative */
|
---|
| 896 |
|
---|
| 897 | *loc += got - dot;
|
---|
| 898 | break;
|
---|
| 899 |
|
---|
| 900 | case R_ARM_PC24:
|
---|
| 901 | case R_ARM_PLT32:
|
---|
| 902 | goto bb_use_plt;
|
---|
| 903 |
|
---|
| 904 | case R_ARM_GOTOFF: /* address relative to the got */
|
---|
| 905 | *loc += v - got;
|
---|
| 906 | break;
|
---|
| 907 |
|
---|
| 908 | #elif defined(__cris__)
|
---|
| 909 |
|
---|
| 910 | case R_CRIS_NONE:
|
---|
| 911 | break;
|
---|
| 912 |
|
---|
| 913 | case R_CRIS_32:
|
---|
| 914 | /* CRIS keeps the relocation value in the r_addend field and
|
---|
| 915 | * should not use whats in *loc at all
|
---|
| 916 | */
|
---|
| 917 | *loc = v;
|
---|
| 918 | break;
|
---|
| 919 |
|
---|
| 920 | #elif defined(__H8300H__) || defined(__H8300S__)
|
---|
| 921 |
|
---|
| 922 | case R_H8_DIR24R8:
|
---|
| 923 | loc = (ElfW(Addr) *)((ElfW(Addr))loc - 1);
|
---|
| 924 | *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v);
|
---|
| 925 | break;
|
---|
| 926 | case R_H8_DIR24A8:
|
---|
| 927 | *loc += v;
|
---|
| 928 | break;
|
---|
| 929 | case R_H8_DIR32:
|
---|
| 930 | case R_H8_DIR32A16:
|
---|
| 931 | *loc += v;
|
---|
| 932 | break;
|
---|
| 933 | case R_H8_PCREL16:
|
---|
| 934 | v -= dot + 2;
|
---|
| 935 | if ((ElfW(Sword))v > 0x7fff ||
|
---|
| 936 | (ElfW(Sword))v < -(ElfW(Sword))0x8000)
|
---|
| 937 | ret = obj_reloc_overflow;
|
---|
| 938 | else
|
---|
| 939 | *(unsigned short *)loc = v;
|
---|
| 940 | break;
|
---|
| 941 | case R_H8_PCREL8:
|
---|
| 942 | v -= dot + 1;
|
---|
| 943 | if ((ElfW(Sword))v > 0x7f ||
|
---|
| 944 | (ElfW(Sword))v < -(ElfW(Sword))0x80)
|
---|
| 945 | ret = obj_reloc_overflow;
|
---|
| 946 | else
|
---|
| 947 | *(unsigned char *)loc = v;
|
---|
| 948 | break;
|
---|
| 949 |
|
---|
| 950 | #elif defined(__i386__)
|
---|
| 951 |
|
---|
| 952 | case R_386_NONE:
|
---|
| 953 | break;
|
---|
| 954 |
|
---|
| 955 | case R_386_32:
|
---|
| 956 | *loc += v;
|
---|
| 957 | break;
|
---|
| 958 |
|
---|
| 959 | case R_386_PLT32:
|
---|
| 960 | case R_386_PC32:
|
---|
| 961 | *loc += v - dot;
|
---|
| 962 | break;
|
---|
| 963 |
|
---|
| 964 | case R_386_GLOB_DAT:
|
---|
| 965 | case R_386_JMP_SLOT:
|
---|
| 966 | *loc = v;
|
---|
| 967 | break;
|
---|
| 968 |
|
---|
| 969 | case R_386_RELATIVE:
|
---|
| 970 | *loc += f->baseaddr;
|
---|
| 971 | break;
|
---|
| 972 |
|
---|
| 973 | case R_386_GOTPC:
|
---|
| 974 | *loc += got - dot;
|
---|
| 975 | break;
|
---|
| 976 |
|
---|
| 977 | case R_386_GOT32:
|
---|
| 978 | goto bb_use_got;
|
---|
| 979 |
|
---|
| 980 | case R_386_GOTOFF:
|
---|
| 981 | *loc += v - got;
|
---|
| 982 | break;
|
---|
| 983 |
|
---|
[1765] | 984 | #elif defined(__microblaze__)
|
---|
[821] | 985 | case R_MICROBLAZE_NONE:
|
---|
| 986 | case R_MICROBLAZE_64_NONE:
|
---|
| 987 | case R_MICROBLAZE_32_SYM_OP_SYM:
|
---|
| 988 | case R_MICROBLAZE_32_PCREL:
|
---|
| 989 | break;
|
---|
| 990 |
|
---|
| 991 | case R_MICROBLAZE_64_PCREL: {
|
---|
| 992 | /* dot is the address of the current instruction.
|
---|
| 993 | * v is the target symbol address.
|
---|
| 994 | * So we need to extract the offset in the code,
|
---|
[1765] | 995 | * adding v, then subtrating the current address
|
---|
[821] | 996 | * of this instruction.
|
---|
| 997 | * Ex: "IMM 0xFFFE bralid 0x0000" = "bralid 0xFFFE0000"
|
---|
| 998 | */
|
---|
| 999 |
|
---|
| 1000 | /* Get split offset stored in code */
|
---|
| 1001 | unsigned int temp = (loc[0] & 0xFFFF) << 16 |
|
---|
| 1002 | (loc[1] & 0xFFFF);
|
---|
| 1003 |
|
---|
[1765] | 1004 | /* Adjust relative offset. -4 adjustment required
|
---|
[821] | 1005 | * because dot points to the IMM insn, but branch
|
---|
| 1006 | * is computed relative to the branch instruction itself.
|
---|
| 1007 | */
|
---|
| 1008 | temp += v - dot - 4;
|
---|
| 1009 |
|
---|
| 1010 | /* Store back into code */
|
---|
| 1011 | loc[0] = (loc[0] & 0xFFFF0000) | temp >> 16;
|
---|
| 1012 | loc[1] = (loc[1] & 0xFFFF0000) | (temp & 0xFFFF);
|
---|
| 1013 |
|
---|
| 1014 | break;
|
---|
| 1015 | }
|
---|
| 1016 |
|
---|
| 1017 | case R_MICROBLAZE_32:
|
---|
| 1018 | *loc += v;
|
---|
| 1019 | break;
|
---|
| 1020 |
|
---|
| 1021 | case R_MICROBLAZE_64: {
|
---|
| 1022 | /* Get split pointer stored in code */
|
---|
| 1023 | unsigned int temp1 = (loc[0] & 0xFFFF) << 16 |
|
---|
| 1024 | (loc[1] & 0xFFFF);
|
---|
| 1025 |
|
---|
| 1026 | /* Add reloc offset */
|
---|
| 1027 | temp1+=v;
|
---|
| 1028 |
|
---|
| 1029 | /* Store back into code */
|
---|
| 1030 | loc[0] = (loc[0] & 0xFFFF0000) | temp1 >> 16;
|
---|
| 1031 | loc[1] = (loc[1] & 0xFFFF0000) | (temp1 & 0xFFFF);
|
---|
| 1032 |
|
---|
| 1033 | break;
|
---|
| 1034 | }
|
---|
| 1035 |
|
---|
| 1036 | case R_MICROBLAZE_32_PCREL_LO:
|
---|
| 1037 | case R_MICROBLAZE_32_LO:
|
---|
| 1038 | case R_MICROBLAZE_SRO32:
|
---|
| 1039 | case R_MICROBLAZE_SRW32:
|
---|
| 1040 | ret = obj_reloc_unhandled;
|
---|
| 1041 | break;
|
---|
| 1042 |
|
---|
| 1043 | #elif defined(__mc68000__)
|
---|
| 1044 |
|
---|
| 1045 | case R_68K_NONE:
|
---|
| 1046 | break;
|
---|
| 1047 |
|
---|
| 1048 | case R_68K_32:
|
---|
| 1049 | *loc += v;
|
---|
| 1050 | break;
|
---|
| 1051 |
|
---|
| 1052 | case R_68K_8:
|
---|
| 1053 | if (v > 0xff) {
|
---|
| 1054 | ret = obj_reloc_overflow;
|
---|
| 1055 | }
|
---|
| 1056 | *(char *)loc = v;
|
---|
| 1057 | break;
|
---|
| 1058 |
|
---|
| 1059 | case R_68K_16:
|
---|
| 1060 | if (v > 0xffff) {
|
---|
| 1061 | ret = obj_reloc_overflow;
|
---|
| 1062 | }
|
---|
| 1063 | *(short *)loc = v;
|
---|
| 1064 | break;
|
---|
| 1065 |
|
---|
| 1066 | case R_68K_PC8:
|
---|
| 1067 | v -= dot;
|
---|
| 1068 | if ((ElfW(Sword))v > 0x7f ||
|
---|
| 1069 | (ElfW(Sword))v < -(ElfW(Sword))0x80) {
|
---|
| 1070 | ret = obj_reloc_overflow;
|
---|
| 1071 | }
|
---|
| 1072 | *(char *)loc = v;
|
---|
| 1073 | break;
|
---|
| 1074 |
|
---|
| 1075 | case R_68K_PC16:
|
---|
| 1076 | v -= dot;
|
---|
| 1077 | if ((ElfW(Sword))v > 0x7fff ||
|
---|
| 1078 | (ElfW(Sword))v < -(ElfW(Sword))0x8000) {
|
---|
| 1079 | ret = obj_reloc_overflow;
|
---|
| 1080 | }
|
---|
| 1081 | *(short *)loc = v;
|
---|
| 1082 | break;
|
---|
| 1083 |
|
---|
| 1084 | case R_68K_PC32:
|
---|
| 1085 | *(int *)loc = v - dot;
|
---|
| 1086 | break;
|
---|
| 1087 |
|
---|
| 1088 | case R_68K_GLOB_DAT:
|
---|
| 1089 | case R_68K_JMP_SLOT:
|
---|
| 1090 | *loc = v;
|
---|
| 1091 | break;
|
---|
| 1092 |
|
---|
| 1093 | case R_68K_RELATIVE:
|
---|
| 1094 | *(int *)loc += f->baseaddr;
|
---|
| 1095 | break;
|
---|
| 1096 |
|
---|
| 1097 | case R_68K_GOT32:
|
---|
| 1098 | goto bb_use_got;
|
---|
| 1099 |
|
---|
| 1100 | # ifdef R_68K_GOTOFF
|
---|
| 1101 | case R_68K_GOTOFF:
|
---|
| 1102 | *loc += v - got;
|
---|
| 1103 | break;
|
---|
| 1104 | # endif
|
---|
| 1105 |
|
---|
| 1106 | #elif defined(__mips__)
|
---|
| 1107 |
|
---|
| 1108 | case R_MIPS_NONE:
|
---|
| 1109 | break;
|
---|
| 1110 |
|
---|
| 1111 | case R_MIPS_32:
|
---|
| 1112 | *loc += v;
|
---|
| 1113 | break;
|
---|
| 1114 |
|
---|
| 1115 | case R_MIPS_26:
|
---|
| 1116 | if (v % 4)
|
---|
| 1117 | ret = obj_reloc_dangerous;
|
---|
| 1118 | if ((v & 0xf0000000) != ((dot + 4) & 0xf0000000))
|
---|
| 1119 | ret = obj_reloc_overflow;
|
---|
| 1120 | *loc =
|
---|
| 1121 | (*loc & ~0x03ffffff) | ((*loc + (v >> 2)) &
|
---|
| 1122 | 0x03ffffff);
|
---|
| 1123 | break;
|
---|
| 1124 |
|
---|
| 1125 | case R_MIPS_HI16:
|
---|
| 1126 | {
|
---|
| 1127 | struct mips_hi16 *n;
|
---|
| 1128 |
|
---|
| 1129 | /* We cannot relocate this one now because we don't know the value
|
---|
| 1130 | of the carry we need to add. Save the information, and let LO16
|
---|
| 1131 | do the actual relocation. */
|
---|
[1765] | 1132 | n = xmalloc(sizeof *n);
|
---|
[821] | 1133 | n->addr = loc;
|
---|
| 1134 | n->value = v;
|
---|
| 1135 | n->next = ifile->mips_hi16_list;
|
---|
| 1136 | ifile->mips_hi16_list = n;
|
---|
| 1137 | break;
|
---|
| 1138 | }
|
---|
| 1139 |
|
---|
| 1140 | case R_MIPS_LO16:
|
---|
| 1141 | {
|
---|
| 1142 | unsigned long insnlo = *loc;
|
---|
| 1143 | ElfW(Addr) val, vallo;
|
---|
| 1144 |
|
---|
| 1145 | /* Sign extend the addend we extract from the lo insn. */
|
---|
| 1146 | vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000;
|
---|
| 1147 |
|
---|
| 1148 | if (ifile->mips_hi16_list != NULL) {
|
---|
| 1149 | struct mips_hi16 *l;
|
---|
| 1150 |
|
---|
| 1151 | l = ifile->mips_hi16_list;
|
---|
| 1152 | while (l != NULL) {
|
---|
| 1153 | struct mips_hi16 *next;
|
---|
| 1154 | unsigned long insn;
|
---|
| 1155 |
|
---|
| 1156 | /* Do the HI16 relocation. Note that we actually don't
|
---|
| 1157 | need to know anything about the LO16 itself, except where
|
---|
| 1158 | to find the low 16 bits of the addend needed by the LO16. */
|
---|
| 1159 | insn = *l->addr;
|
---|
| 1160 | val =
|
---|
| 1161 | ((insn & 0xffff) << 16) +
|
---|
| 1162 | vallo;
|
---|
| 1163 | val += v;
|
---|
| 1164 |
|
---|
| 1165 | /* Account for the sign extension that will happen in the
|
---|
| 1166 | low bits. */
|
---|
| 1167 | val =
|
---|
| 1168 | ((val >> 16) +
|
---|
| 1169 | ((val & 0x8000) !=
|
---|
| 1170 | 0)) & 0xffff;
|
---|
| 1171 |
|
---|
| 1172 | insn = (insn & ~0xffff) | val;
|
---|
| 1173 | *l->addr = insn;
|
---|
| 1174 |
|
---|
| 1175 | next = l->next;
|
---|
| 1176 | free(l);
|
---|
| 1177 | l = next;
|
---|
| 1178 | }
|
---|
| 1179 |
|
---|
| 1180 | ifile->mips_hi16_list = NULL;
|
---|
| 1181 | }
|
---|
| 1182 |
|
---|
| 1183 | /* Ok, we're done with the HI16 relocs. Now deal with the LO16. */
|
---|
| 1184 | val = v + vallo;
|
---|
| 1185 | insnlo = (insnlo & ~0xffff) | (val & 0xffff);
|
---|
| 1186 | *loc = insnlo;
|
---|
| 1187 | break;
|
---|
| 1188 | }
|
---|
| 1189 |
|
---|
| 1190 | #elif defined(__nios2__)
|
---|
| 1191 |
|
---|
| 1192 | case R_NIOS2_NONE:
|
---|
| 1193 | break;
|
---|
| 1194 |
|
---|
| 1195 | case R_NIOS2_BFD_RELOC_32:
|
---|
| 1196 | *loc += v;
|
---|
| 1197 | break;
|
---|
| 1198 |
|
---|
| 1199 | case R_NIOS2_BFD_RELOC_16:
|
---|
| 1200 | if (v > 0xffff) {
|
---|
| 1201 | ret = obj_reloc_overflow;
|
---|
| 1202 | }
|
---|
| 1203 | *(short *)loc = v;
|
---|
| 1204 | break;
|
---|
| 1205 |
|
---|
| 1206 | case R_NIOS2_BFD_RELOC_8:
|
---|
| 1207 | if (v > 0xff) {
|
---|
| 1208 | ret = obj_reloc_overflow;
|
---|
| 1209 | }
|
---|
| 1210 | *(char *)loc = v;
|
---|
| 1211 | break;
|
---|
| 1212 |
|
---|
| 1213 | case R_NIOS2_S16:
|
---|
| 1214 | {
|
---|
| 1215 | Elf32_Addr word;
|
---|
| 1216 |
|
---|
| 1217 | if ((Elf32_Sword)v > 0x7fff ||
|
---|
| 1218 | (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
|
---|
| 1219 | ret = obj_reloc_overflow;
|
---|
| 1220 | }
|
---|
| 1221 |
|
---|
| 1222 | word = *loc;
|
---|
| 1223 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
|
---|
| 1224 | (word & 0x3f);
|
---|
| 1225 | }
|
---|
| 1226 | break;
|
---|
| 1227 |
|
---|
| 1228 | case R_NIOS2_U16:
|
---|
| 1229 | {
|
---|
| 1230 | Elf32_Addr word;
|
---|
| 1231 |
|
---|
| 1232 | if (v > 0xffff) {
|
---|
| 1233 | ret = obj_reloc_overflow;
|
---|
| 1234 | }
|
---|
| 1235 |
|
---|
| 1236 | word = *loc;
|
---|
| 1237 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
|
---|
| 1238 | (word & 0x3f);
|
---|
| 1239 | }
|
---|
| 1240 | break;
|
---|
| 1241 |
|
---|
| 1242 | case R_NIOS2_PCREL16:
|
---|
| 1243 | {
|
---|
| 1244 | Elf32_Addr word;
|
---|
| 1245 |
|
---|
| 1246 | v -= dot + 4;
|
---|
| 1247 | if ((Elf32_Sword)v > 0x7fff ||
|
---|
| 1248 | (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
|
---|
| 1249 | ret = obj_reloc_overflow;
|
---|
| 1250 | }
|
---|
| 1251 |
|
---|
| 1252 | word = *loc;
|
---|
| 1253 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
|
---|
| 1254 | }
|
---|
| 1255 | break;
|
---|
| 1256 |
|
---|
| 1257 | case R_NIOS2_GPREL:
|
---|
| 1258 | {
|
---|
| 1259 | Elf32_Addr word, gp;
|
---|
| 1260 | /* get _gp */
|
---|
| 1261 | gp = obj_symbol_final_value(f, obj_find_symbol(f, SPFX "_gp"));
|
---|
| 1262 | v-=gp;
|
---|
| 1263 | if ((Elf32_Sword)v > 0x7fff ||
|
---|
| 1264 | (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
|
---|
| 1265 | ret = obj_reloc_overflow;
|
---|
| 1266 | }
|
---|
| 1267 |
|
---|
| 1268 | word = *loc;
|
---|
| 1269 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
|
---|
| 1270 | }
|
---|
| 1271 | break;
|
---|
| 1272 |
|
---|
| 1273 | case R_NIOS2_CALL26:
|
---|
| 1274 | if (v & 3)
|
---|
| 1275 | ret = obj_reloc_dangerous;
|
---|
| 1276 | if ((v >> 28) != (dot >> 28))
|
---|
| 1277 | ret = obj_reloc_overflow;
|
---|
| 1278 | *loc = (*loc & 0x3f) | ((v >> 2) << 6);
|
---|
| 1279 | break;
|
---|
| 1280 |
|
---|
| 1281 | case R_NIOS2_IMM5:
|
---|
| 1282 | {
|
---|
| 1283 | Elf32_Addr word;
|
---|
| 1284 |
|
---|
| 1285 | if (v > 0x1f) {
|
---|
| 1286 | ret = obj_reloc_overflow;
|
---|
| 1287 | }
|
---|
| 1288 |
|
---|
| 1289 | word = *loc & ~0x7c0;
|
---|
| 1290 | *loc = word | ((v & 0x1f) << 6);
|
---|
| 1291 | }
|
---|
| 1292 | break;
|
---|
| 1293 |
|
---|
| 1294 | case R_NIOS2_IMM6:
|
---|
| 1295 | {
|
---|
| 1296 | Elf32_Addr word;
|
---|
| 1297 |
|
---|
| 1298 | if (v > 0x3f) {
|
---|
| 1299 | ret = obj_reloc_overflow;
|
---|
| 1300 | }
|
---|
| 1301 |
|
---|
| 1302 | word = *loc & ~0xfc0;
|
---|
| 1303 | *loc = word | ((v & 0x3f) << 6);
|
---|
| 1304 | }
|
---|
| 1305 | break;
|
---|
| 1306 |
|
---|
| 1307 | case R_NIOS2_IMM8:
|
---|
| 1308 | {
|
---|
| 1309 | Elf32_Addr word;
|
---|
| 1310 |
|
---|
| 1311 | if (v > 0xff) {
|
---|
| 1312 | ret = obj_reloc_overflow;
|
---|
| 1313 | }
|
---|
| 1314 |
|
---|
| 1315 | word = *loc & ~0x3fc0;
|
---|
| 1316 | *loc = word | ((v & 0xff) << 6);
|
---|
| 1317 | }
|
---|
| 1318 | break;
|
---|
| 1319 |
|
---|
| 1320 | case R_NIOS2_HI16:
|
---|
| 1321 | {
|
---|
| 1322 | Elf32_Addr word;
|
---|
| 1323 |
|
---|
| 1324 | word = *loc;
|
---|
| 1325 | *loc = ((((word >> 22) << 16) | ((v >>16) & 0xffff)) << 6) |
|
---|
| 1326 | (word & 0x3f);
|
---|
| 1327 | }
|
---|
| 1328 | break;
|
---|
| 1329 |
|
---|
| 1330 | case R_NIOS2_LO16:
|
---|
| 1331 | {
|
---|
| 1332 | Elf32_Addr word;
|
---|
| 1333 |
|
---|
| 1334 | word = *loc;
|
---|
| 1335 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
|
---|
| 1336 | (word & 0x3f);
|
---|
| 1337 | }
|
---|
| 1338 | break;
|
---|
| 1339 |
|
---|
| 1340 | case R_NIOS2_HIADJ16:
|
---|
| 1341 | {
|
---|
| 1342 | Elf32_Addr word1, word2;
|
---|
| 1343 |
|
---|
| 1344 | word1 = *loc;
|
---|
| 1345 | word2 = ((v >> 16) + ((v >> 15) & 1)) & 0xffff;
|
---|
| 1346 | *loc = ((((word1 >> 22) << 16) | word2) << 6) |
|
---|
| 1347 | (word1 & 0x3f);
|
---|
| 1348 | }
|
---|
| 1349 | break;
|
---|
| 1350 |
|
---|
| 1351 | #elif defined(__powerpc64__)
|
---|
| 1352 | /* PPC64 needs a 2.6 kernel, 2.4 module relocation irrelevant */
|
---|
| 1353 |
|
---|
| 1354 | #elif defined(__powerpc__)
|
---|
| 1355 |
|
---|
| 1356 | case R_PPC_ADDR16_HA:
|
---|
| 1357 | *(unsigned short *)loc = (v + 0x8000) >> 16;
|
---|
| 1358 | break;
|
---|
| 1359 |
|
---|
| 1360 | case R_PPC_ADDR16_HI:
|
---|
| 1361 | *(unsigned short *)loc = v >> 16;
|
---|
| 1362 | break;
|
---|
| 1363 |
|
---|
| 1364 | case R_PPC_ADDR16_LO:
|
---|
| 1365 | *(unsigned short *)loc = v;
|
---|
| 1366 | break;
|
---|
| 1367 |
|
---|
| 1368 | case R_PPC_REL24:
|
---|
| 1369 | goto bb_use_plt;
|
---|
| 1370 |
|
---|
| 1371 | case R_PPC_REL32:
|
---|
| 1372 | *loc = v - dot;
|
---|
| 1373 | break;
|
---|
| 1374 |
|
---|
| 1375 | case R_PPC_ADDR32:
|
---|
| 1376 | *loc = v;
|
---|
| 1377 | break;
|
---|
| 1378 |
|
---|
| 1379 | #elif defined(__s390__)
|
---|
| 1380 |
|
---|
| 1381 | case R_390_32:
|
---|
| 1382 | *(unsigned int *) loc += v;
|
---|
| 1383 | break;
|
---|
| 1384 | case R_390_16:
|
---|
| 1385 | *(unsigned short *) loc += v;
|
---|
| 1386 | break;
|
---|
| 1387 | case R_390_8:
|
---|
| 1388 | *(unsigned char *) loc += v;
|
---|
| 1389 | break;
|
---|
| 1390 |
|
---|
| 1391 | case R_390_PC32:
|
---|
| 1392 | *(unsigned int *) loc += v - dot;
|
---|
| 1393 | break;
|
---|
| 1394 | case R_390_PC16DBL:
|
---|
| 1395 | *(unsigned short *) loc += (v - dot) >> 1;
|
---|
| 1396 | break;
|
---|
| 1397 | case R_390_PC16:
|
---|
| 1398 | *(unsigned short *) loc += v - dot;
|
---|
| 1399 | break;
|
---|
| 1400 |
|
---|
| 1401 | case R_390_PLT32:
|
---|
| 1402 | case R_390_PLT16DBL:
|
---|
| 1403 | /* find the plt entry and initialize it. */
|
---|
| 1404 | pe = (struct arch_single_entry *) &isym->pltent;
|
---|
| 1405 | if (pe->inited == 0) {
|
---|
| 1406 | ip = (unsigned long *)(ifile->plt->contents + pe->offset);
|
---|
| 1407 | ip[0] = 0x0d105810; /* basr 1,0; lg 1,10(1); br 1 */
|
---|
| 1408 | ip[1] = 0x100607f1;
|
---|
| 1409 | if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
|
---|
| 1410 | ip[2] = v - 2;
|
---|
| 1411 | else
|
---|
| 1412 | ip[2] = v;
|
---|
| 1413 | pe->inited = 1;
|
---|
| 1414 | }
|
---|
| 1415 |
|
---|
| 1416 | /* Insert relative distance to target. */
|
---|
| 1417 | v = plt + pe->offset - dot;
|
---|
| 1418 | if (ELF_R_TYPE(rel->r_info) == R_390_PLT32)
|
---|
| 1419 | *(unsigned int *) loc = (unsigned int) v;
|
---|
| 1420 | else if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
|
---|
| 1421 | *(unsigned short *) loc = (unsigned short) ((v + 2) >> 1);
|
---|
| 1422 | break;
|
---|
| 1423 |
|
---|
| 1424 | case R_390_GLOB_DAT:
|
---|
| 1425 | case R_390_JMP_SLOT:
|
---|
| 1426 | *loc = v;
|
---|
| 1427 | break;
|
---|
| 1428 |
|
---|
| 1429 | case R_390_RELATIVE:
|
---|
| 1430 | *loc += f->baseaddr;
|
---|
| 1431 | break;
|
---|
| 1432 |
|
---|
| 1433 | case R_390_GOTPC:
|
---|
| 1434 | *(unsigned long *) loc += got - dot;
|
---|
| 1435 | break;
|
---|
| 1436 |
|
---|
| 1437 | case R_390_GOT12:
|
---|
| 1438 | case R_390_GOT16:
|
---|
| 1439 | case R_390_GOT32:
|
---|
| 1440 | if (!isym->gotent.inited)
|
---|
| 1441 | {
|
---|
| 1442 | isym->gotent.inited = 1;
|
---|
| 1443 | *(ElfW(Addr) *)(ifile->got->contents + isym->gotent.offset) = v;
|
---|
| 1444 | }
|
---|
| 1445 | if (ELF_R_TYPE(rel->r_info) == R_390_GOT12)
|
---|
| 1446 | *(unsigned short *) loc |= (*(unsigned short *) loc + isym->gotent.offset) & 0xfff;
|
---|
| 1447 | else if (ELF_R_TYPE(rel->r_info) == R_390_GOT16)
|
---|
| 1448 | *(unsigned short *) loc += isym->gotent.offset;
|
---|
| 1449 | else if (ELF_R_TYPE(rel->r_info) == R_390_GOT32)
|
---|
| 1450 | *(unsigned int *) loc += isym->gotent.offset;
|
---|
| 1451 | break;
|
---|
| 1452 |
|
---|
| 1453 | # ifndef R_390_GOTOFF32
|
---|
| 1454 | # define R_390_GOTOFF32 R_390_GOTOFF
|
---|
| 1455 | # endif
|
---|
| 1456 | case R_390_GOTOFF32:
|
---|
| 1457 | *loc += v - got;
|
---|
| 1458 | break;
|
---|
| 1459 |
|
---|
| 1460 | #elif defined(__sh__)
|
---|
| 1461 |
|
---|
| 1462 | case R_SH_NONE:
|
---|
| 1463 | break;
|
---|
| 1464 |
|
---|
| 1465 | case R_SH_DIR32:
|
---|
| 1466 | *loc += v;
|
---|
| 1467 | break;
|
---|
| 1468 |
|
---|
| 1469 | case R_SH_REL32:
|
---|
| 1470 | *loc += v - dot;
|
---|
| 1471 | break;
|
---|
| 1472 |
|
---|
| 1473 | case R_SH_PLT32:
|
---|
| 1474 | *loc = v - dot;
|
---|
| 1475 | break;
|
---|
| 1476 |
|
---|
| 1477 | case R_SH_GLOB_DAT:
|
---|
| 1478 | case R_SH_JMP_SLOT:
|
---|
| 1479 | *loc = v;
|
---|
| 1480 | break;
|
---|
| 1481 |
|
---|
| 1482 | case R_SH_RELATIVE:
|
---|
| 1483 | *loc = f->baseaddr + rel->r_addend;
|
---|
| 1484 | break;
|
---|
| 1485 |
|
---|
| 1486 | case R_SH_GOTPC:
|
---|
| 1487 | *loc = got - dot + rel->r_addend;
|
---|
| 1488 | break;
|
---|
| 1489 |
|
---|
| 1490 | case R_SH_GOT32:
|
---|
| 1491 | goto bb_use_got;
|
---|
| 1492 |
|
---|
| 1493 | case R_SH_GOTOFF:
|
---|
| 1494 | *loc = v - got;
|
---|
| 1495 | break;
|
---|
| 1496 |
|
---|
| 1497 | # if defined(__SH5__)
|
---|
| 1498 | case R_SH_IMM_MEDLOW16:
|
---|
| 1499 | case R_SH_IMM_LOW16:
|
---|
| 1500 | {
|
---|
| 1501 | ElfW(Addr) word;
|
---|
| 1502 |
|
---|
| 1503 | if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16)
|
---|
| 1504 | v >>= 16;
|
---|
| 1505 |
|
---|
| 1506 | /*
|
---|
| 1507 | * movi and shori have the format:
|
---|
| 1508 | *
|
---|
| 1509 | * | op | imm | reg | reserved |
|
---|
| 1510 | * 31..26 25..10 9.. 4 3 .. 0
|
---|
| 1511 | *
|
---|
| 1512 | * so we simply mask and or in imm.
|
---|
| 1513 | */
|
---|
| 1514 | word = *loc & ~0x3fffc00;
|
---|
| 1515 | word |= (v & 0xffff) << 10;
|
---|
| 1516 |
|
---|
| 1517 | *loc = word;
|
---|
| 1518 |
|
---|
| 1519 | break;
|
---|
| 1520 | }
|
---|
| 1521 |
|
---|
| 1522 | case R_SH_IMM_MEDLOW16_PCREL:
|
---|
| 1523 | case R_SH_IMM_LOW16_PCREL:
|
---|
| 1524 | {
|
---|
| 1525 | ElfW(Addr) word;
|
---|
| 1526 |
|
---|
| 1527 | word = *loc & ~0x3fffc00;
|
---|
| 1528 |
|
---|
| 1529 | v -= dot;
|
---|
| 1530 |
|
---|
| 1531 | if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16_PCREL)
|
---|
| 1532 | v >>= 16;
|
---|
| 1533 |
|
---|
| 1534 | word |= (v & 0xffff) << 10;
|
---|
| 1535 |
|
---|
| 1536 | *loc = word;
|
---|
| 1537 |
|
---|
| 1538 | break;
|
---|
| 1539 | }
|
---|
| 1540 | # endif /* __SH5__ */
|
---|
| 1541 |
|
---|
[1765] | 1542 | #elif defined(__v850e__)
|
---|
[821] | 1543 |
|
---|
| 1544 | case R_V850_NONE:
|
---|
| 1545 | break;
|
---|
| 1546 |
|
---|
| 1547 | case R_V850_32:
|
---|
| 1548 | /* We write two shorts instead of a long because even
|
---|
| 1549 | 32-bit insns only need half-word alignment, but
|
---|
| 1550 | 32-bit data needs to be long-word aligned. */
|
---|
| 1551 | v += ((unsigned short *)loc)[0];
|
---|
| 1552 | v += ((unsigned short *)loc)[1] << 16;
|
---|
| 1553 | ((unsigned short *)loc)[0] = v & 0xffff;
|
---|
| 1554 | ((unsigned short *)loc)[1] = (v >> 16) & 0xffff;
|
---|
| 1555 | break;
|
---|
| 1556 |
|
---|
| 1557 | case R_V850_22_PCREL:
|
---|
| 1558 | goto bb_use_plt;
|
---|
| 1559 |
|
---|
| 1560 | #elif defined(__x86_64__)
|
---|
| 1561 |
|
---|
| 1562 | case R_X86_64_NONE:
|
---|
| 1563 | break;
|
---|
| 1564 |
|
---|
| 1565 | case R_X86_64_64:
|
---|
| 1566 | *loc += v;
|
---|
| 1567 | break;
|
---|
| 1568 |
|
---|
| 1569 | case R_X86_64_32:
|
---|
| 1570 | *(unsigned int *) loc += v;
|
---|
| 1571 | if (v > 0xffffffff)
|
---|
| 1572 | {
|
---|
| 1573 | ret = obj_reloc_overflow; /* Kernel module compiled without -mcmodel=kernel. */
|
---|
| 1574 | /* error("Possibly is module compiled without -mcmodel=kernel!"); */
|
---|
| 1575 | }
|
---|
| 1576 | break;
|
---|
| 1577 |
|
---|
| 1578 | case R_X86_64_32S:
|
---|
| 1579 | *(signed int *) loc += v;
|
---|
| 1580 | break;
|
---|
| 1581 |
|
---|
| 1582 | case R_X86_64_16:
|
---|
| 1583 | *(unsigned short *) loc += v;
|
---|
| 1584 | break;
|
---|
| 1585 |
|
---|
| 1586 | case R_X86_64_8:
|
---|
| 1587 | *(unsigned char *) loc += v;
|
---|
| 1588 | break;
|
---|
| 1589 |
|
---|
| 1590 | case R_X86_64_PC32:
|
---|
| 1591 | *(unsigned int *) loc += v - dot;
|
---|
| 1592 | break;
|
---|
| 1593 |
|
---|
| 1594 | case R_X86_64_PC16:
|
---|
| 1595 | *(unsigned short *) loc += v - dot;
|
---|
| 1596 | break;
|
---|
| 1597 |
|
---|
| 1598 | case R_X86_64_PC8:
|
---|
| 1599 | *(unsigned char *) loc += v - dot;
|
---|
| 1600 | break;
|
---|
| 1601 |
|
---|
| 1602 | case R_X86_64_GLOB_DAT:
|
---|
| 1603 | case R_X86_64_JUMP_SLOT:
|
---|
| 1604 | *loc = v;
|
---|
| 1605 | break;
|
---|
| 1606 |
|
---|
| 1607 | case R_X86_64_RELATIVE:
|
---|
| 1608 | *loc += f->baseaddr;
|
---|
| 1609 | break;
|
---|
| 1610 |
|
---|
| 1611 | case R_X86_64_GOT32:
|
---|
| 1612 | case R_X86_64_GOTPCREL:
|
---|
| 1613 | goto bb_use_got;
|
---|
| 1614 | # if 0
|
---|
| 1615 | if (!isym->gotent.reloc_done)
|
---|
| 1616 | {
|
---|
| 1617 | isym->gotent.reloc_done = 1;
|
---|
| 1618 | *(Elf64_Addr *)(ifile->got->contents + isym->gotent.offset) = v;
|
---|
| 1619 | }
|
---|
| 1620 | /* XXX are these really correct? */
|
---|
| 1621 | if (ELF64_R_TYPE(rel->r_info) == R_X86_64_GOTPCREL)
|
---|
| 1622 | *(unsigned int *) loc += v + isym->gotent.offset;
|
---|
| 1623 | else
|
---|
| 1624 | *loc += isym->gotent.offset;
|
---|
| 1625 | break;
|
---|
| 1626 | # endif
|
---|
| 1627 |
|
---|
| 1628 | #else
|
---|
| 1629 | # warning "no idea how to handle relocations on your arch"
|
---|
| 1630 | #endif
|
---|
| 1631 |
|
---|
| 1632 | default:
|
---|
| 1633 | printf("Warning: unhandled reloc %d\n",(int)ELF_R_TYPE(rel->r_info));
|
---|
| 1634 | ret = obj_reloc_unhandled;
|
---|
| 1635 | break;
|
---|
| 1636 |
|
---|
[1765] | 1637 | #if defined(USE_PLT_ENTRIES)
|
---|
[821] | 1638 |
|
---|
| 1639 | bb_use_plt:
|
---|
| 1640 |
|
---|
| 1641 | /* find the plt entry and initialize it if necessary */
|
---|
| 1642 |
|
---|
[1765] | 1643 | #if defined(USE_PLT_LIST)
|
---|
[821] | 1644 | for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;)
|
---|
| 1645 | pe = pe->next;
|
---|
| 1646 | #else
|
---|
| 1647 | pe = &isym->pltent;
|
---|
| 1648 | #endif
|
---|
| 1649 |
|
---|
| 1650 | if (! pe->inited) {
|
---|
| 1651 | ip = (unsigned long *) (ifile->plt->contents + pe->offset);
|
---|
| 1652 |
|
---|
| 1653 | /* generate some machine code */
|
---|
| 1654 |
|
---|
| 1655 | #if defined(__arm__)
|
---|
| 1656 | ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */
|
---|
| 1657 | ip[1] = v; /* sym@ */
|
---|
| 1658 | #endif
|
---|
| 1659 | #if defined(__powerpc__)
|
---|
| 1660 | ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */
|
---|
| 1661 | ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */
|
---|
| 1662 | ip[2] = 0x7d6903a6; /* mtctr r11 */
|
---|
| 1663 | ip[3] = 0x4e800420; /* bctr */
|
---|
| 1664 | #endif
|
---|
[1765] | 1665 | #if defined(__v850e__)
|
---|
[821] | 1666 | /* We have to trash a register, so we assume that any control
|
---|
| 1667 | transfer more than 21-bits away must be a function call
|
---|
| 1668 | (so we can use a call-clobbered register). */
|
---|
| 1669 | ip[0] = 0x0621 + ((v & 0xffff) << 16); /* mov sym, r1 ... */
|
---|
| 1670 | ip[1] = ((v >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */
|
---|
| 1671 | #endif
|
---|
| 1672 | pe->inited = 1;
|
---|
| 1673 | }
|
---|
| 1674 |
|
---|
| 1675 | /* relative distance to target */
|
---|
| 1676 | v -= dot;
|
---|
| 1677 | /* if the target is too far away.... */
|
---|
[1765] | 1678 | #if defined(__arm__) || defined(__powerpc__)
|
---|
[821] | 1679 | if ((int)v < -0x02000000 || (int)v >= 0x02000000)
|
---|
[1765] | 1680 | #elif defined(__v850e__)
|
---|
[821] | 1681 | if ((ElfW(Sword))v > 0x1fffff || (ElfW(Sword))v < (ElfW(Sword))-0x200000)
|
---|
| 1682 | #endif
|
---|
| 1683 | /* go via the plt */
|
---|
| 1684 | v = plt + pe->offset - dot;
|
---|
| 1685 |
|
---|
[1765] | 1686 | #if defined(__v850e__)
|
---|
[821] | 1687 | if (v & 1)
|
---|
| 1688 | #else
|
---|
| 1689 | if (v & 3)
|
---|
| 1690 | #endif
|
---|
| 1691 | ret = obj_reloc_dangerous;
|
---|
| 1692 |
|
---|
| 1693 | /* merge the offset into the instruction. */
|
---|
| 1694 | #if defined(__arm__)
|
---|
| 1695 | /* Convert to words. */
|
---|
| 1696 | v >>= 2;
|
---|
| 1697 |
|
---|
| 1698 | *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff);
|
---|
| 1699 | #endif
|
---|
| 1700 | #if defined(__powerpc__)
|
---|
| 1701 | *loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc);
|
---|
| 1702 | #endif
|
---|
[1765] | 1703 | #if defined(__v850e__)
|
---|
[821] | 1704 | /* We write two shorts instead of a long because even 32-bit insns
|
---|
| 1705 | only need half-word alignment, but the 32-bit data write needs
|
---|
| 1706 | to be long-word aligned. */
|
---|
| 1707 | ((unsigned short *)loc)[0] =
|
---|
| 1708 | (*(unsigned short *)loc & 0xffc0) /* opcode + reg */
|
---|
| 1709 | | ((v >> 16) & 0x3f); /* offs high part */
|
---|
| 1710 | ((unsigned short *)loc)[1] =
|
---|
| 1711 | (v & 0xffff); /* offs low part */
|
---|
| 1712 | #endif
|
---|
| 1713 | break;
|
---|
[1765] | 1714 | #endif /* USE_PLT_ENTRIES */
|
---|
[821] | 1715 |
|
---|
[1765] | 1716 | #if defined(USE_GOT_ENTRIES)
|
---|
[821] | 1717 | bb_use_got:
|
---|
| 1718 |
|
---|
| 1719 | /* needs an entry in the .got: set it, once */
|
---|
| 1720 | if (!isym->gotent.inited) {
|
---|
| 1721 | isym->gotent.inited = 1;
|
---|
| 1722 | *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v;
|
---|
| 1723 | }
|
---|
| 1724 | /* make the reloc with_respect_to_.got */
|
---|
| 1725 | #if defined(__sh__)
|
---|
| 1726 | *loc += isym->gotent.offset + rel->r_addend;
|
---|
| 1727 | #elif defined(__i386__) || defined(__arm__) || defined(__mc68000__)
|
---|
| 1728 | *loc += isym->gotent.offset;
|
---|
| 1729 | #endif
|
---|
| 1730 | break;
|
---|
| 1731 |
|
---|
[1765] | 1732 | #endif /* USE_GOT_ENTRIES */
|
---|
[821] | 1733 | }
|
---|
| 1734 |
|
---|
| 1735 | return ret;
|
---|
| 1736 | }
|
---|
| 1737 |
|
---|
| 1738 |
|
---|
[1765] | 1739 | #if defined(USE_LIST)
|
---|
[821] | 1740 |
|
---|
| 1741 | static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list,
|
---|
| 1742 | int offset, int size)
|
---|
| 1743 | {
|
---|
| 1744 | struct arch_list_entry *pe;
|
---|
| 1745 |
|
---|
| 1746 | for (pe = *list; pe != NULL; pe = pe->next) {
|
---|
| 1747 | if (pe->addend == rel->r_addend) {
|
---|
| 1748 | break;
|
---|
| 1749 | }
|
---|
| 1750 | }
|
---|
| 1751 |
|
---|
| 1752 | if (pe == NULL) {
|
---|
| 1753 | pe = xmalloc(sizeof(struct arch_list_entry));
|
---|
| 1754 | pe->next = *list;
|
---|
| 1755 | pe->addend = rel->r_addend;
|
---|
| 1756 | pe->offset = offset;
|
---|
| 1757 | pe->inited = 0;
|
---|
| 1758 | *list = pe;
|
---|
| 1759 | return size;
|
---|
| 1760 | }
|
---|
| 1761 | return 0;
|
---|
| 1762 | }
|
---|
| 1763 |
|
---|
| 1764 | #endif
|
---|
| 1765 |
|
---|
[1765] | 1766 | #if defined(USE_SINGLE)
|
---|
[821] | 1767 |
|
---|
| 1768 | static int arch_single_init(ElfW(RelM) *rel, struct arch_single_entry *single,
|
---|
| 1769 | int offset, int size)
|
---|
| 1770 | {
|
---|
| 1771 | if (single->allocated == 0) {
|
---|
| 1772 | single->allocated = 1;
|
---|
| 1773 | single->offset = offset;
|
---|
| 1774 | single->inited = 0;
|
---|
| 1775 | return size;
|
---|
| 1776 | }
|
---|
| 1777 | return 0;
|
---|
| 1778 | }
|
---|
| 1779 |
|
---|
| 1780 | #endif
|
---|
| 1781 |
|
---|
[1765] | 1782 | #if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
|
---|
[821] | 1783 |
|
---|
[1765] | 1784 | static struct obj_section *arch_xsect_init(struct obj_file *f, const char *name,
|
---|
[821] | 1785 | int offset, int size)
|
---|
| 1786 | {
|
---|
| 1787 | struct obj_section *myrelsec = obj_find_section(f, name);
|
---|
| 1788 |
|
---|
| 1789 | if (offset == 0) {
|
---|
| 1790 | offset += size;
|
---|
| 1791 | }
|
---|
| 1792 |
|
---|
| 1793 | if (myrelsec) {
|
---|
| 1794 | obj_extend_section(myrelsec, offset);
|
---|
| 1795 | } else {
|
---|
| 1796 | myrelsec = obj_create_alloced_section(f, name,
|
---|
| 1797 | size, offset);
|
---|
| 1798 | }
|
---|
| 1799 |
|
---|
| 1800 | return myrelsec;
|
---|
| 1801 | }
|
---|
| 1802 |
|
---|
| 1803 | #endif
|
---|
| 1804 |
|
---|
| 1805 | static void arch_create_got(struct obj_file *f)
|
---|
| 1806 | {
|
---|
[1765] | 1807 | #if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
|
---|
[821] | 1808 | struct arch_file *ifile = (struct arch_file *) f;
|
---|
| 1809 | int i;
|
---|
[1765] | 1810 | #if defined(USE_GOT_ENTRIES)
|
---|
[821] | 1811 | int got_offset = 0, got_needed = 0, got_allocate;
|
---|
| 1812 | #endif
|
---|
[1765] | 1813 | #if defined(USE_PLT_ENTRIES)
|
---|
[821] | 1814 | int plt_offset = 0, plt_needed = 0, plt_allocate;
|
---|
| 1815 | #endif
|
---|
| 1816 | struct obj_section *relsec, *symsec, *strsec;
|
---|
| 1817 | ElfW(RelM) *rel, *relend;
|
---|
| 1818 | ElfW(Sym) *symtab, *extsym;
|
---|
| 1819 | const char *strtab, *name;
|
---|
| 1820 | struct arch_symbol *intsym;
|
---|
| 1821 |
|
---|
| 1822 | for (i = 0; i < f->header.e_shnum; ++i) {
|
---|
| 1823 | relsec = f->sections[i];
|
---|
| 1824 | if (relsec->header.sh_type != SHT_RELM)
|
---|
| 1825 | continue;
|
---|
| 1826 |
|
---|
| 1827 | symsec = f->sections[relsec->header.sh_link];
|
---|
| 1828 | strsec = f->sections[symsec->header.sh_link];
|
---|
| 1829 |
|
---|
| 1830 | rel = (ElfW(RelM) *) relsec->contents;
|
---|
| 1831 | relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM)));
|
---|
| 1832 | symtab = (ElfW(Sym) *) symsec->contents;
|
---|
| 1833 | strtab = (const char *) strsec->contents;
|
---|
| 1834 |
|
---|
| 1835 | for (; rel < relend; ++rel) {
|
---|
| 1836 | extsym = &symtab[ELF_R_SYM(rel->r_info)];
|
---|
| 1837 |
|
---|
[1765] | 1838 | #if defined(USE_GOT_ENTRIES)
|
---|
[821] | 1839 | got_allocate = 0;
|
---|
| 1840 | #endif
|
---|
[1765] | 1841 | #if defined(USE_PLT_ENTRIES)
|
---|
[821] | 1842 | plt_allocate = 0;
|
---|
| 1843 | #endif
|
---|
| 1844 |
|
---|
| 1845 | switch (ELF_R_TYPE(rel->r_info)) {
|
---|
| 1846 | #if defined(__arm__)
|
---|
[1765] | 1847 | case R_ARM_PC24:
|
---|
| 1848 | case R_ARM_PLT32:
|
---|
| 1849 | plt_allocate = 1;
|
---|
| 1850 | break;
|
---|
[821] | 1851 |
|
---|
[1765] | 1852 | case R_ARM_GOTOFF:
|
---|
| 1853 | case R_ARM_GOTPC:
|
---|
| 1854 | got_needed = 1;
|
---|
| 1855 | continue;
|
---|
[821] | 1856 |
|
---|
[1765] | 1857 | case R_ARM_GOT32:
|
---|
| 1858 | got_allocate = 1;
|
---|
| 1859 | break;
|
---|
[821] | 1860 |
|
---|
| 1861 | #elif defined(__i386__)
|
---|
[1765] | 1862 | case R_386_GOTPC:
|
---|
| 1863 | case R_386_GOTOFF:
|
---|
| 1864 | got_needed = 1;
|
---|
| 1865 | continue;
|
---|
[821] | 1866 |
|
---|
[1765] | 1867 | case R_386_GOT32:
|
---|
| 1868 | got_allocate = 1;
|
---|
| 1869 | break;
|
---|
[821] | 1870 |
|
---|
| 1871 | #elif defined(__powerpc__)
|
---|
[1765] | 1872 | case R_PPC_REL24:
|
---|
| 1873 | plt_allocate = 1;
|
---|
| 1874 | break;
|
---|
[821] | 1875 |
|
---|
| 1876 | #elif defined(__mc68000__)
|
---|
[1765] | 1877 | case R_68K_GOT32:
|
---|
| 1878 | got_allocate = 1;
|
---|
| 1879 | break;
|
---|
[821] | 1880 |
|
---|
| 1881 | #ifdef R_68K_GOTOFF
|
---|
[1765] | 1882 | case R_68K_GOTOFF:
|
---|
| 1883 | got_needed = 1;
|
---|
| 1884 | continue;
|
---|
[821] | 1885 | #endif
|
---|
| 1886 |
|
---|
| 1887 | #elif defined(__sh__)
|
---|
[1765] | 1888 | case R_SH_GOT32:
|
---|
| 1889 | got_allocate = 1;
|
---|
| 1890 | break;
|
---|
[821] | 1891 |
|
---|
[1765] | 1892 | case R_SH_GOTPC:
|
---|
| 1893 | case R_SH_GOTOFF:
|
---|
| 1894 | got_needed = 1;
|
---|
| 1895 | continue;
|
---|
[821] | 1896 |
|
---|
[1765] | 1897 | #elif defined(__v850e__)
|
---|
| 1898 | case R_V850_22_PCREL:
|
---|
| 1899 | plt_needed = 1;
|
---|
| 1900 | break;
|
---|
[821] | 1901 |
|
---|
| 1902 | #endif
|
---|
[1765] | 1903 | default:
|
---|
| 1904 | continue;
|
---|
[821] | 1905 | }
|
---|
| 1906 |
|
---|
| 1907 | if (extsym->st_name != 0) {
|
---|
| 1908 | name = strtab + extsym->st_name;
|
---|
| 1909 | } else {
|
---|
| 1910 | name = f->sections[extsym->st_shndx]->name;
|
---|
| 1911 | }
|
---|
| 1912 | intsym = (struct arch_symbol *) obj_find_symbol(f, name);
|
---|
[1765] | 1913 | #if defined(USE_GOT_ENTRIES)
|
---|
[821] | 1914 | if (got_allocate) {
|
---|
| 1915 | got_offset += arch_single_init(
|
---|
| 1916 | rel, &intsym->gotent,
|
---|
[1765] | 1917 | got_offset, GOT_ENTRY_SIZE);
|
---|
[821] | 1918 |
|
---|
| 1919 | got_needed = 1;
|
---|
| 1920 | }
|
---|
| 1921 | #endif
|
---|
[1765] | 1922 | #if defined(USE_PLT_ENTRIES)
|
---|
[821] | 1923 | if (plt_allocate) {
|
---|
[1765] | 1924 | #if defined(USE_PLT_LIST)
|
---|
[821] | 1925 | plt_offset += arch_list_add(
|
---|
| 1926 | rel, &intsym->pltent,
|
---|
[1765] | 1927 | plt_offset, PLT_ENTRY_SIZE);
|
---|
[821] | 1928 | #else
|
---|
| 1929 | plt_offset += arch_single_init(
|
---|
| 1930 | rel, &intsym->pltent,
|
---|
[1765] | 1931 | plt_offset, PLT_ENTRY_SIZE);
|
---|
[821] | 1932 | #endif
|
---|
| 1933 | plt_needed = 1;
|
---|
| 1934 | }
|
---|
| 1935 | #endif
|
---|
| 1936 | }
|
---|
| 1937 | }
|
---|
| 1938 |
|
---|
[1765] | 1939 | #if defined(USE_GOT_ENTRIES)
|
---|
[821] | 1940 | if (got_needed) {
|
---|
| 1941 | ifile->got = arch_xsect_init(f, ".got", got_offset,
|
---|
[1765] | 1942 | GOT_ENTRY_SIZE);
|
---|
[821] | 1943 | }
|
---|
| 1944 | #endif
|
---|
| 1945 |
|
---|
[1765] | 1946 | #if defined(USE_PLT_ENTRIES)
|
---|
[821] | 1947 | if (plt_needed) {
|
---|
| 1948 | ifile->plt = arch_xsect_init(f, ".plt", plt_offset,
|
---|
[1765] | 1949 | PLT_ENTRY_SIZE);
|
---|
[821] | 1950 | }
|
---|
| 1951 | #endif
|
---|
| 1952 |
|
---|
[1765] | 1953 | #endif /* defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) */
|
---|
[821] | 1954 | }
|
---|
| 1955 |
|
---|
| 1956 | /*======================================================================*/
|
---|
| 1957 |
|
---|
| 1958 | /* Standard ELF hash function. */
|
---|
[1765] | 1959 | static unsigned long obj_elf_hash_n(const char *name, unsigned long n)
|
---|
[821] | 1960 | {
|
---|
| 1961 | unsigned long h = 0;
|
---|
| 1962 | unsigned long g;
|
---|
| 1963 | unsigned char ch;
|
---|
| 1964 |
|
---|
| 1965 | while (n > 0) {
|
---|
| 1966 | ch = *name++;
|
---|
| 1967 | h = (h << 4) + ch;
|
---|
| 1968 | if ((g = (h & 0xf0000000)) != 0) {
|
---|
| 1969 | h ^= g >> 24;
|
---|
| 1970 | h &= ~g;
|
---|
| 1971 | }
|
---|
| 1972 | n--;
|
---|
| 1973 | }
|
---|
| 1974 | return h;
|
---|
| 1975 | }
|
---|
| 1976 |
|
---|
| 1977 | static unsigned long obj_elf_hash(const char *name)
|
---|
| 1978 | {
|
---|
| 1979 | return obj_elf_hash_n(name, strlen(name));
|
---|
| 1980 | }
|
---|
| 1981 |
|
---|
[1765] | 1982 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
[821] | 1983 | /* String comparison for non-co-versioned kernel and module. */
|
---|
| 1984 |
|
---|
| 1985 | static int ncv_strcmp(const char *a, const char *b)
|
---|
| 1986 | {
|
---|
| 1987 | size_t alen = strlen(a), blen = strlen(b);
|
---|
| 1988 |
|
---|
| 1989 | if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R')
|
---|
| 1990 | return strncmp(a, b, alen);
|
---|
| 1991 | else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R')
|
---|
| 1992 | return strncmp(a, b, blen);
|
---|
| 1993 | else
|
---|
| 1994 | return strcmp(a, b);
|
---|
| 1995 | }
|
---|
| 1996 |
|
---|
| 1997 | /* String hashing for non-co-versioned kernel and module. Here
|
---|
| 1998 | we are simply forced to drop the crc from the hash. */
|
---|
| 1999 |
|
---|
| 2000 | static unsigned long ncv_symbol_hash(const char *str)
|
---|
| 2001 | {
|
---|
| 2002 | size_t len = strlen(str);
|
---|
| 2003 | if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R')
|
---|
| 2004 | len -= 10;
|
---|
| 2005 | return obj_elf_hash_n(str, len);
|
---|
| 2006 | }
|
---|
| 2007 |
|
---|
| 2008 | static void
|
---|
| 2009 | obj_set_symbol_compare(struct obj_file *f,
|
---|
| 2010 | int (*cmp) (const char *, const char *),
|
---|
| 2011 | unsigned long (*hash) (const char *))
|
---|
| 2012 | {
|
---|
| 2013 | if (cmp)
|
---|
| 2014 | f->symbol_cmp = cmp;
|
---|
| 2015 | if (hash) {
|
---|
| 2016 | struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next;
|
---|
| 2017 | int i;
|
---|
| 2018 |
|
---|
| 2019 | f->symbol_hash = hash;
|
---|
| 2020 |
|
---|
| 2021 | memcpy(tmptab, f->symtab, sizeof(tmptab));
|
---|
| 2022 | memset(f->symtab, 0, sizeof(f->symtab));
|
---|
| 2023 |
|
---|
| 2024 | for (i = 0; i < HASH_BUCKETS; ++i)
|
---|
| 2025 | for (sym = tmptab[i]; sym; sym = next) {
|
---|
| 2026 | unsigned long h = hash(sym->name) % HASH_BUCKETS;
|
---|
| 2027 | next = sym->next;
|
---|
| 2028 | sym->next = f->symtab[h];
|
---|
| 2029 | f->symtab[h] = sym;
|
---|
| 2030 | }
|
---|
| 2031 | }
|
---|
| 2032 | }
|
---|
| 2033 |
|
---|
[1765] | 2034 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
[821] | 2035 |
|
---|
| 2036 | static struct obj_symbol *
|
---|
| 2037 | obj_add_symbol(struct obj_file *f, const char *name,
|
---|
[1765] | 2038 | unsigned long symidx, int info,
|
---|
| 2039 | int secidx, ElfW(Addr) value,
|
---|
| 2040 | unsigned long size)
|
---|
[821] | 2041 | {
|
---|
| 2042 | struct obj_symbol *sym;
|
---|
| 2043 | unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
|
---|
| 2044 | int n_type = ELF_ST_TYPE(info);
|
---|
| 2045 | int n_binding = ELF_ST_BIND(info);
|
---|
| 2046 |
|
---|
| 2047 | for (sym = f->symtab[hash]; sym; sym = sym->next)
|
---|
| 2048 | if (f->symbol_cmp(sym->name, name) == 0) {
|
---|
| 2049 | int o_secidx = sym->secidx;
|
---|
| 2050 | int o_info = sym->info;
|
---|
| 2051 | int o_type = ELF_ST_TYPE(o_info);
|
---|
| 2052 | int o_binding = ELF_ST_BIND(o_info);
|
---|
| 2053 |
|
---|
| 2054 | /* A redefinition! Is it legal? */
|
---|
| 2055 |
|
---|
| 2056 | if (secidx == SHN_UNDEF)
|
---|
| 2057 | return sym;
|
---|
| 2058 | else if (o_secidx == SHN_UNDEF)
|
---|
| 2059 | goto found;
|
---|
| 2060 | else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) {
|
---|
| 2061 | /* Cope with local and global symbols of the same name
|
---|
| 2062 | in the same object file, as might have been created
|
---|
| 2063 | by ld -r. The only reason locals are now seen at this
|
---|
| 2064 | level at all is so that we can do semi-sensible things
|
---|
| 2065 | with parameters. */
|
---|
| 2066 |
|
---|
| 2067 | struct obj_symbol *nsym, **p;
|
---|
| 2068 |
|
---|
| 2069 | nsym = arch_new_symbol();
|
---|
| 2070 | nsym->next = sym->next;
|
---|
| 2071 | nsym->ksymidx = -1;
|
---|
| 2072 |
|
---|
| 2073 | /* Excise the old (local) symbol from the hash chain. */
|
---|
| 2074 | for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next)
|
---|
| 2075 | continue;
|
---|
| 2076 | *p = sym = nsym;
|
---|
| 2077 | goto found;
|
---|
| 2078 | } else if (n_binding == STB_LOCAL) {
|
---|
| 2079 | /* Another symbol of the same name has already been defined.
|
---|
| 2080 | Just add this to the local table. */
|
---|
| 2081 | sym = arch_new_symbol();
|
---|
| 2082 | sym->next = NULL;
|
---|
| 2083 | sym->ksymidx = -1;
|
---|
| 2084 | f->local_symtab[symidx] = sym;
|
---|
| 2085 | goto found;
|
---|
| 2086 | } else if (n_binding == STB_WEAK)
|
---|
| 2087 | return sym;
|
---|
| 2088 | else if (o_binding == STB_WEAK)
|
---|
| 2089 | goto found;
|
---|
| 2090 | /* Don't unify COMMON symbols with object types the programmer
|
---|
| 2091 | doesn't expect. */
|
---|
| 2092 | else if (secidx == SHN_COMMON
|
---|
| 2093 | && (o_type == STT_NOTYPE || o_type == STT_OBJECT))
|
---|
| 2094 | return sym;
|
---|
| 2095 | else if (o_secidx == SHN_COMMON
|
---|
| 2096 | && (n_type == STT_NOTYPE || n_type == STT_OBJECT))
|
---|
| 2097 | goto found;
|
---|
| 2098 | else {
|
---|
| 2099 | /* Don't report an error if the symbol is coming from
|
---|
| 2100 | the kernel or some external module. */
|
---|
| 2101 | if (secidx <= SHN_HIRESERVE)
|
---|
| 2102 | bb_error_msg("%s multiply defined", name);
|
---|
| 2103 | return sym;
|
---|
| 2104 | }
|
---|
| 2105 | }
|
---|
| 2106 |
|
---|
| 2107 | /* Completely new symbol. */
|
---|
| 2108 | sym = arch_new_symbol();
|
---|
| 2109 | sym->next = f->symtab[hash];
|
---|
| 2110 | f->symtab[hash] = sym;
|
---|
| 2111 | sym->ksymidx = -1;
|
---|
| 2112 |
|
---|
| 2113 | if (ELF_ST_BIND(info) == STB_LOCAL && symidx != -1) {
|
---|
| 2114 | if (symidx >= f->local_symtab_size)
|
---|
| 2115 | bb_error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld",
|
---|
| 2116 | name, (long) symidx, (long) f->local_symtab_size);
|
---|
| 2117 | else
|
---|
| 2118 | f->local_symtab[symidx] = sym;
|
---|
| 2119 | }
|
---|
| 2120 |
|
---|
| 2121 | found:
|
---|
| 2122 | sym->name = name;
|
---|
| 2123 | sym->value = value;
|
---|
| 2124 | sym->size = size;
|
---|
| 2125 | sym->secidx = secidx;
|
---|
| 2126 | sym->info = info;
|
---|
| 2127 |
|
---|
| 2128 | return sym;
|
---|
| 2129 | }
|
---|
| 2130 |
|
---|
| 2131 | static struct obj_symbol *
|
---|
| 2132 | obj_find_symbol(struct obj_file *f, const char *name)
|
---|
| 2133 | {
|
---|
| 2134 | struct obj_symbol *sym;
|
---|
| 2135 | unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
|
---|
| 2136 |
|
---|
| 2137 | for (sym = f->symtab[hash]; sym; sym = sym->next)
|
---|
| 2138 | if (f->symbol_cmp(sym->name, name) == 0)
|
---|
| 2139 | return sym;
|
---|
| 2140 |
|
---|
| 2141 | return NULL;
|
---|
| 2142 | }
|
---|
| 2143 |
|
---|
[1765] | 2144 | static ElfW(Addr) obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym)
|
---|
[821] | 2145 | {
|
---|
| 2146 | if (sym) {
|
---|
| 2147 | if (sym->secidx >= SHN_LORESERVE)
|
---|
| 2148 | return sym->value;
|
---|
| 2149 |
|
---|
| 2150 | return sym->value + f->sections[sym->secidx]->header.sh_addr;
|
---|
| 2151 | } else {
|
---|
| 2152 | /* As a special case, a NULL sym has value zero. */
|
---|
| 2153 | return 0;
|
---|
| 2154 | }
|
---|
| 2155 | }
|
---|
| 2156 |
|
---|
| 2157 | static struct obj_section *obj_find_section(struct obj_file *f, const char *name)
|
---|
| 2158 | {
|
---|
| 2159 | int i, n = f->header.e_shnum;
|
---|
| 2160 |
|
---|
| 2161 | for (i = 0; i < n; ++i)
|
---|
| 2162 | if (strcmp(f->sections[i]->name, name) == 0)
|
---|
| 2163 | return f->sections[i];
|
---|
| 2164 |
|
---|
| 2165 | return NULL;
|
---|
| 2166 | }
|
---|
| 2167 |
|
---|
| 2168 | static int obj_load_order_prio(struct obj_section *a)
|
---|
| 2169 | {
|
---|
| 2170 | unsigned long af, ac;
|
---|
| 2171 |
|
---|
| 2172 | af = a->header.sh_flags;
|
---|
| 2173 |
|
---|
| 2174 | ac = 0;
|
---|
| 2175 | if (a->name[0] != '.' || strlen(a->name) != 10 ||
|
---|
| 2176 | strcmp(a->name + 5, ".init"))
|
---|
| 2177 | ac |= 32;
|
---|
| 2178 | if (af & SHF_ALLOC)
|
---|
| 2179 | ac |= 16;
|
---|
| 2180 | if (!(af & SHF_WRITE))
|
---|
| 2181 | ac |= 8;
|
---|
| 2182 | if (af & SHF_EXECINSTR)
|
---|
| 2183 | ac |= 4;
|
---|
| 2184 | if (a->header.sh_type != SHT_NOBITS)
|
---|
| 2185 | ac |= 2;
|
---|
| 2186 |
|
---|
| 2187 | return ac;
|
---|
| 2188 | }
|
---|
| 2189 |
|
---|
| 2190 | static void
|
---|
| 2191 | obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec)
|
---|
| 2192 | {
|
---|
| 2193 | struct obj_section **p;
|
---|
| 2194 | int prio = obj_load_order_prio(sec);
|
---|
| 2195 | for (p = f->load_order_search_start; *p; p = &(*p)->load_next)
|
---|
| 2196 | if (obj_load_order_prio(*p) < prio)
|
---|
| 2197 | break;
|
---|
| 2198 | sec->load_next = *p;
|
---|
| 2199 | *p = sec;
|
---|
| 2200 | }
|
---|
| 2201 |
|
---|
| 2202 | static struct obj_section *obj_create_alloced_section(struct obj_file *f,
|
---|
[1765] | 2203 | const char *name,
|
---|
| 2204 | unsigned long align,
|
---|
| 2205 | unsigned long size)
|
---|
[821] | 2206 | {
|
---|
| 2207 | int newidx = f->header.e_shnum++;
|
---|
| 2208 | struct obj_section *sec;
|
---|
| 2209 |
|
---|
| 2210 | f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec));
|
---|
| 2211 | f->sections[newidx] = sec = arch_new_section();
|
---|
| 2212 |
|
---|
| 2213 | memset(sec, 0, sizeof(*sec));
|
---|
| 2214 | sec->header.sh_type = SHT_PROGBITS;
|
---|
| 2215 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
|
---|
| 2216 | sec->header.sh_size = size;
|
---|
| 2217 | sec->header.sh_addralign = align;
|
---|
| 2218 | sec->name = name;
|
---|
| 2219 | sec->idx = newidx;
|
---|
| 2220 | if (size)
|
---|
| 2221 | sec->contents = xmalloc(size);
|
---|
| 2222 |
|
---|
| 2223 | obj_insert_section_load_order(f, sec);
|
---|
| 2224 |
|
---|
| 2225 | return sec;
|
---|
| 2226 | }
|
---|
| 2227 |
|
---|
| 2228 | static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
|
---|
[1765] | 2229 | const char *name,
|
---|
| 2230 | unsigned long align,
|
---|
| 2231 | unsigned long size)
|
---|
[821] | 2232 | {
|
---|
| 2233 | int newidx = f->header.e_shnum++;
|
---|
| 2234 | struct obj_section *sec;
|
---|
| 2235 |
|
---|
| 2236 | f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec));
|
---|
| 2237 | f->sections[newidx] = sec = arch_new_section();
|
---|
| 2238 |
|
---|
| 2239 | memset(sec, 0, sizeof(*sec));
|
---|
| 2240 | sec->header.sh_type = SHT_PROGBITS;
|
---|
| 2241 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
|
---|
| 2242 | sec->header.sh_size = size;
|
---|
| 2243 | sec->header.sh_addralign = align;
|
---|
| 2244 | sec->name = name;
|
---|
| 2245 | sec->idx = newidx;
|
---|
| 2246 | if (size)
|
---|
| 2247 | sec->contents = xmalloc(size);
|
---|
| 2248 |
|
---|
| 2249 | sec->load_next = f->load_order;
|
---|
| 2250 | f->load_order = sec;
|
---|
| 2251 | if (f->load_order_search_start == &f->load_order)
|
---|
| 2252 | f->load_order_search_start = &sec->load_next;
|
---|
| 2253 |
|
---|
| 2254 | return sec;
|
---|
| 2255 | }
|
---|
| 2256 |
|
---|
| 2257 | static void *obj_extend_section(struct obj_section *sec, unsigned long more)
|
---|
| 2258 | {
|
---|
| 2259 | unsigned long oldsize = sec->header.sh_size;
|
---|
| 2260 | if (more) {
|
---|
| 2261 | sec->contents = xrealloc(sec->contents, sec->header.sh_size += more);
|
---|
| 2262 | }
|
---|
| 2263 | return sec->contents + oldsize;
|
---|
| 2264 | }
|
---|
| 2265 |
|
---|
| 2266 |
|
---|
| 2267 | /* Conditionally add the symbols from the given symbol set to the
|
---|
| 2268 | new module. */
|
---|
| 2269 |
|
---|
| 2270 | static int
|
---|
| 2271 | add_symbols_from( struct obj_file *f,
|
---|
| 2272 | int idx, struct new_module_symbol *syms, size_t nsyms)
|
---|
| 2273 | {
|
---|
| 2274 | struct new_module_symbol *s;
|
---|
| 2275 | size_t i;
|
---|
| 2276 | int used = 0;
|
---|
| 2277 | #ifdef SYMBOL_PREFIX
|
---|
| 2278 | char *name_buf = 0;
|
---|
| 2279 | size_t name_alloced_size = 0;
|
---|
| 2280 | #endif
|
---|
[1765] | 2281 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
|
---|
[821] | 2282 | int gpl;
|
---|
| 2283 |
|
---|
| 2284 | gpl = obj_gpl_license(f, NULL) == 0;
|
---|
| 2285 | #endif
|
---|
| 2286 | for (i = 0, s = syms; i < nsyms; ++i, ++s) {
|
---|
| 2287 | /* Only add symbols that are already marked external.
|
---|
| 2288 | If we override locals we may cause problems for
|
---|
| 2289 | argument initialization. We will also create a false
|
---|
| 2290 | dependency on the module. */
|
---|
| 2291 | struct obj_symbol *sym;
|
---|
| 2292 | char *name;
|
---|
| 2293 |
|
---|
| 2294 | /* GPL licensed modules can use symbols exported with
|
---|
| 2295 | * EXPORT_SYMBOL_GPL, so ignore any GPLONLY_ prefix on the
|
---|
| 2296 | * exported names. Non-GPL modules never see any GPLONLY_
|
---|
| 2297 | * symbols so they cannot fudge it by adding the prefix on
|
---|
| 2298 | * their references.
|
---|
| 2299 | */
|
---|
| 2300 | if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) {
|
---|
[1765] | 2301 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
|
---|
[821] | 2302 | if (gpl)
|
---|
| 2303 | s->name += 8;
|
---|
| 2304 | else
|
---|
| 2305 | #endif
|
---|
| 2306 | continue;
|
---|
| 2307 | }
|
---|
| 2308 | name = (char *)s->name;
|
---|
| 2309 |
|
---|
| 2310 | #ifdef SYMBOL_PREFIX
|
---|
| 2311 | /* Prepend SYMBOL_PREFIX to the symbol's name (the
|
---|
| 2312 | kernel exports `C names', but module object files
|
---|
| 2313 | reference `linker names'). */
|
---|
| 2314 | size_t extra = sizeof SYMBOL_PREFIX;
|
---|
[1765] | 2315 | size_t name_size = strlen(name) + extra;
|
---|
[821] | 2316 | if (name_size > name_alloced_size) {
|
---|
| 2317 | name_alloced_size = name_size * 2;
|
---|
[1765] | 2318 | name_buf = alloca(name_alloced_size);
|
---|
[821] | 2319 | }
|
---|
[1765] | 2320 | strcpy(name_buf, SYMBOL_PREFIX);
|
---|
| 2321 | strcpy(name_buf + extra - 1, name);
|
---|
[821] | 2322 | name = name_buf;
|
---|
| 2323 | #endif /* SYMBOL_PREFIX */
|
---|
| 2324 |
|
---|
| 2325 | sym = obj_find_symbol(f, name);
|
---|
| 2326 | if (sym && !(ELF_ST_BIND(sym->info) == STB_LOCAL)) {
|
---|
| 2327 | #ifdef SYMBOL_PREFIX
|
---|
| 2328 | /* Put NAME_BUF into more permanent storage. */
|
---|
[1765] | 2329 | name = xmalloc(name_size);
|
---|
| 2330 | strcpy(name, name_buf);
|
---|
[821] | 2331 | #endif
|
---|
| 2332 | sym = obj_add_symbol(f, name, -1,
|
---|
| 2333 | ELF_ST_INFO(STB_GLOBAL,
|
---|
| 2334 | STT_NOTYPE),
|
---|
| 2335 | idx, s->value, 0);
|
---|
| 2336 | /* Did our symbol just get installed? If so, mark the
|
---|
| 2337 | module as "used". */
|
---|
| 2338 | if (sym->secidx == idx)
|
---|
| 2339 | used = 1;
|
---|
| 2340 | }
|
---|
| 2341 | }
|
---|
| 2342 |
|
---|
| 2343 | return used;
|
---|
| 2344 | }
|
---|
| 2345 |
|
---|
| 2346 | static void add_kernel_symbols(struct obj_file *f)
|
---|
| 2347 | {
|
---|
| 2348 | struct external_module *m;
|
---|
| 2349 | int i, nused = 0;
|
---|
| 2350 |
|
---|
| 2351 | /* Add module symbols first. */
|
---|
| 2352 |
|
---|
[1765] | 2353 | for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) {
|
---|
[821] | 2354 | if (m->nsyms
|
---|
[1765] | 2355 | && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, m->nsyms)
|
---|
| 2356 | ) {
|
---|
| 2357 | m->used = 1;
|
---|
| 2358 | ++nused;
|
---|
| 2359 | }
|
---|
| 2360 | }
|
---|
[821] | 2361 |
|
---|
| 2362 | n_ext_modules_used = nused;
|
---|
| 2363 |
|
---|
| 2364 | /* And finally the symbols from the kernel proper. */
|
---|
| 2365 |
|
---|
| 2366 | if (nksyms)
|
---|
| 2367 | add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms);
|
---|
| 2368 | }
|
---|
| 2369 |
|
---|
| 2370 | static char *get_modinfo_value(struct obj_file *f, const char *key)
|
---|
| 2371 | {
|
---|
| 2372 | struct obj_section *sec;
|
---|
| 2373 | char *p, *v, *n, *ep;
|
---|
| 2374 | size_t klen = strlen(key);
|
---|
| 2375 |
|
---|
| 2376 | sec = obj_find_section(f, ".modinfo");
|
---|
| 2377 | if (sec == NULL)
|
---|
| 2378 | return NULL;
|
---|
| 2379 | p = sec->contents;
|
---|
| 2380 | ep = p + sec->header.sh_size;
|
---|
| 2381 | while (p < ep) {
|
---|
| 2382 | v = strchr(p, '=');
|
---|
| 2383 | n = strchr(p, '\0');
|
---|
| 2384 | if (v) {
|
---|
| 2385 | if (p + klen == v && strncmp(p, key, klen) == 0)
|
---|
| 2386 | return v + 1;
|
---|
| 2387 | } else {
|
---|
| 2388 | if (p + klen == n && strcmp(p, key) == 0)
|
---|
| 2389 | return n;
|
---|
| 2390 | }
|
---|
| 2391 | p = n + 1;
|
---|
| 2392 | }
|
---|
| 2393 |
|
---|
| 2394 | return NULL;
|
---|
| 2395 | }
|
---|
| 2396 |
|
---|
| 2397 |
|
---|
| 2398 | /*======================================================================*/
|
---|
| 2399 | /* Functions relating to module loading after 2.1.18. */
|
---|
| 2400 |
|
---|
| 2401 | static int
|
---|
| 2402 | new_process_module_arguments(struct obj_file *f, int argc, char **argv)
|
---|
| 2403 | {
|
---|
| 2404 | while (argc > 0) {
|
---|
| 2405 | char *p, *q, *key, *sym_name;
|
---|
| 2406 | struct obj_symbol *sym;
|
---|
| 2407 | char *contents, *loc;
|
---|
| 2408 | int min, max, n;
|
---|
| 2409 |
|
---|
| 2410 | p = *argv;
|
---|
| 2411 | if ((q = strchr(p, '=')) == NULL) {
|
---|
| 2412 | argc--;
|
---|
| 2413 | continue;
|
---|
| 2414 | }
|
---|
| 2415 |
|
---|
| 2416 | key = alloca(q - p + 6);
|
---|
| 2417 | memcpy(key, "parm_", 5);
|
---|
| 2418 | memcpy(key + 5, p, q - p);
|
---|
| 2419 | key[q - p + 5] = 0;
|
---|
| 2420 |
|
---|
| 2421 | p = get_modinfo_value(f, key);
|
---|
| 2422 | key += 5;
|
---|
| 2423 | if (p == NULL) {
|
---|
| 2424 | bb_error_msg("invalid parameter %s", key);
|
---|
| 2425 | return 0;
|
---|
| 2426 | }
|
---|
| 2427 |
|
---|
| 2428 | #ifdef SYMBOL_PREFIX
|
---|
[1765] | 2429 | sym_name = alloca(strlen(key) + sizeof SYMBOL_PREFIX);
|
---|
| 2430 | strcpy(sym_name, SYMBOL_PREFIX);
|
---|
| 2431 | strcat(sym_name, key);
|
---|
[821] | 2432 | #else
|
---|
| 2433 | sym_name = key;
|
---|
| 2434 | #endif
|
---|
| 2435 | sym = obj_find_symbol(f, sym_name);
|
---|
| 2436 |
|
---|
| 2437 | /* Also check that the parameter was not resolved from the kernel. */
|
---|
| 2438 | if (sym == NULL || sym->secidx > SHN_HIRESERVE) {
|
---|
| 2439 | bb_error_msg("symbol for parameter %s not found", key);
|
---|
| 2440 | return 0;
|
---|
| 2441 | }
|
---|
| 2442 |
|
---|
| 2443 | if (isdigit(*p)) {
|
---|
| 2444 | min = strtoul(p, &p, 10);
|
---|
| 2445 | if (*p == '-')
|
---|
| 2446 | max = strtoul(p + 1, &p, 10);
|
---|
| 2447 | else
|
---|
| 2448 | max = min;
|
---|
| 2449 | } else
|
---|
| 2450 | min = max = 1;
|
---|
| 2451 |
|
---|
| 2452 | contents = f->sections[sym->secidx]->contents;
|
---|
| 2453 | loc = contents + sym->value;
|
---|
| 2454 | n = (*++q != '\0');
|
---|
| 2455 |
|
---|
| 2456 | while (1) {
|
---|
| 2457 | if ((*p == 's') || (*p == 'c')) {
|
---|
| 2458 | char *str;
|
---|
| 2459 |
|
---|
| 2460 | /* Do C quoting if we begin with a ", else slurp the lot. */
|
---|
| 2461 | if (*q == '"') {
|
---|
| 2462 | char *r;
|
---|
| 2463 |
|
---|
| 2464 | str = alloca(strlen(q));
|
---|
| 2465 | for (r = str, q++; *q != '"'; ++q, ++r) {
|
---|
| 2466 | if (*q == '\0') {
|
---|
| 2467 | bb_error_msg("improperly terminated string argument for %s",
|
---|
| 2468 | key);
|
---|
| 2469 | return 0;
|
---|
| 2470 | } else if (*q == '\\')
|
---|
| 2471 | switch (*++q) {
|
---|
[1765] | 2472 | case 'a':
|
---|
| 2473 | *r = '\a';
|
---|
| 2474 | break;
|
---|
| 2475 | case 'b':
|
---|
| 2476 | *r = '\b';
|
---|
| 2477 | break;
|
---|
| 2478 | case 'e':
|
---|
| 2479 | *r = '\033';
|
---|
| 2480 | break;
|
---|
| 2481 | case 'f':
|
---|
| 2482 | *r = '\f';
|
---|
| 2483 | break;
|
---|
| 2484 | case 'n':
|
---|
| 2485 | *r = '\n';
|
---|
| 2486 | break;
|
---|
| 2487 | case 'r':
|
---|
| 2488 | *r = '\r';
|
---|
| 2489 | break;
|
---|
| 2490 | case 't':
|
---|
| 2491 | *r = '\t';
|
---|
| 2492 | break;
|
---|
[821] | 2493 |
|
---|
[1765] | 2494 | case '0':
|
---|
| 2495 | case '1':
|
---|
| 2496 | case '2':
|
---|
| 2497 | case '3':
|
---|
| 2498 | case '4':
|
---|
| 2499 | case '5':
|
---|
| 2500 | case '6':
|
---|
| 2501 | case '7':
|
---|
| 2502 | {
|
---|
| 2503 | int c = *q - '0';
|
---|
| 2504 | if (q[1] >= '0' && q[1] <= '7') {
|
---|
| 2505 | c = (c * 8) + *++q - '0';
|
---|
| 2506 | if (q[1] >= '0' && q[1] <= '7')
|
---|
[821] | 2507 | c = (c * 8) + *++q - '0';
|
---|
| 2508 | }
|
---|
[1765] | 2509 | *r = c;
|
---|
| 2510 | }
|
---|
| 2511 | break;
|
---|
[821] | 2512 |
|
---|
[1765] | 2513 | default:
|
---|
| 2514 | *r = *q;
|
---|
| 2515 | break;
|
---|
[821] | 2516 | } else
|
---|
| 2517 | *r = *q;
|
---|
| 2518 | }
|
---|
| 2519 | *r = '\0';
|
---|
| 2520 | ++q;
|
---|
| 2521 | } else {
|
---|
| 2522 | char *r;
|
---|
| 2523 |
|
---|
| 2524 | /* In this case, the string is not quoted. We will break
|
---|
| 2525 | it using the coma (like for ints). If the user wants to
|
---|
| 2526 | include comas in a string, he just has to quote it */
|
---|
| 2527 |
|
---|
| 2528 | /* Search the next coma */
|
---|
| 2529 | r = strchr(q, ',');
|
---|
| 2530 |
|
---|
| 2531 | /* Found ? */
|
---|
| 2532 | if (r != (char *) NULL) {
|
---|
| 2533 | /* Recopy the current field */
|
---|
| 2534 | str = alloca(r - q + 1);
|
---|
| 2535 | memcpy(str, q, r - q);
|
---|
| 2536 |
|
---|
| 2537 | /* I don't know if it is useful, as the previous case
|
---|
| 2538 | doesn't nul terminate the string ??? */
|
---|
| 2539 | str[r - q] = '\0';
|
---|
| 2540 |
|
---|
| 2541 | /* Keep next fields */
|
---|
| 2542 | q = r;
|
---|
| 2543 | } else {
|
---|
| 2544 | /* last string */
|
---|
| 2545 | str = q;
|
---|
[1765] | 2546 | q = (char*)"";
|
---|
[821] | 2547 | }
|
---|
| 2548 | }
|
---|
| 2549 |
|
---|
| 2550 | if (*p == 's') {
|
---|
| 2551 | /* Normal string */
|
---|
| 2552 | obj_string_patch(f, sym->secidx, loc - contents, str);
|
---|
| 2553 | loc += tgt_sizeof_char_p;
|
---|
| 2554 | } else {
|
---|
[1765] | 2555 | /* Array of chars (in fact, matrix!) */
|
---|
[821] | 2556 | unsigned long charssize; /* size of each member */
|
---|
| 2557 |
|
---|
| 2558 | /* Get the size of each member */
|
---|
| 2559 | /* Probably we should do that outside the loop ? */
|
---|
| 2560 | if (!isdigit(*(p + 1))) {
|
---|
| 2561 | bb_error_msg("parameter type 'c' for %s must be followed by"
|
---|
| 2562 | " the maximum size", key);
|
---|
| 2563 | return 0;
|
---|
| 2564 | }
|
---|
| 2565 | charssize = strtoul(p + 1, (char **) NULL, 10);
|
---|
| 2566 |
|
---|
| 2567 | /* Check length */
|
---|
| 2568 | if (strlen(str) >= charssize) {
|
---|
| 2569 | bb_error_msg("string too long for %s (max %ld)", key,
|
---|
| 2570 | charssize - 1);
|
---|
| 2571 | return 0;
|
---|
| 2572 | }
|
---|
| 2573 |
|
---|
| 2574 | /* Copy to location */
|
---|
| 2575 | strcpy((char *) loc, str);
|
---|
| 2576 | loc += charssize;
|
---|
| 2577 | }
|
---|
| 2578 | } else {
|
---|
| 2579 | long v = strtoul(q, &q, 0);
|
---|
| 2580 | switch (*p) {
|
---|
[1765] | 2581 | case 'b':
|
---|
| 2582 | *loc++ = v;
|
---|
| 2583 | break;
|
---|
| 2584 | case 'h':
|
---|
| 2585 | *(short *) loc = v;
|
---|
| 2586 | loc += tgt_sizeof_short;
|
---|
| 2587 | break;
|
---|
| 2588 | case 'i':
|
---|
| 2589 | *(int *) loc = v;
|
---|
| 2590 | loc += tgt_sizeof_int;
|
---|
| 2591 | break;
|
---|
| 2592 | case 'l':
|
---|
| 2593 | *(long *) loc = v;
|
---|
| 2594 | loc += tgt_sizeof_long;
|
---|
| 2595 | break;
|
---|
[821] | 2596 |
|
---|
[1765] | 2597 | default:
|
---|
| 2598 | bb_error_msg("unknown parameter type '%c' for %s", *p, key);
|
---|
| 2599 | return 0;
|
---|
[821] | 2600 | }
|
---|
| 2601 | }
|
---|
| 2602 |
|
---|
| 2603 | retry_end_of_value:
|
---|
| 2604 | switch (*q) {
|
---|
[1765] | 2605 | case '\0':
|
---|
| 2606 | goto end_of_arg;
|
---|
[821] | 2607 |
|
---|
[1765] | 2608 | case ' ':
|
---|
| 2609 | case '\t':
|
---|
| 2610 | case '\n':
|
---|
| 2611 | case '\r':
|
---|
| 2612 | ++q;
|
---|
| 2613 | goto retry_end_of_value;
|
---|
[821] | 2614 |
|
---|
[1765] | 2615 | case ',':
|
---|
| 2616 | if (++n > max) {
|
---|
| 2617 | bb_error_msg("too many values for %s (max %d)", key, max);
|
---|
| 2618 | return 0;
|
---|
| 2619 | }
|
---|
| 2620 | ++q;
|
---|
| 2621 | break;
|
---|
[821] | 2622 |
|
---|
[1765] | 2623 | default:
|
---|
| 2624 | bb_error_msg("invalid argument syntax for %s", key);
|
---|
| 2625 | return 0;
|
---|
[821] | 2626 | }
|
---|
| 2627 | }
|
---|
| 2628 |
|
---|
| 2629 | end_of_arg:
|
---|
| 2630 | if (n < min) {
|
---|
| 2631 | bb_error_msg("too few values for %s (min %d)", key, min);
|
---|
| 2632 | return 0;
|
---|
| 2633 | }
|
---|
| 2634 |
|
---|
| 2635 | argc--, argv++;
|
---|
| 2636 | }
|
---|
| 2637 |
|
---|
| 2638 | return 1;
|
---|
| 2639 | }
|
---|
| 2640 |
|
---|
[1765] | 2641 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
[821] | 2642 | static int new_is_module_checksummed(struct obj_file *f)
|
---|
| 2643 | {
|
---|
| 2644 | const char *p = get_modinfo_value(f, "using_checksums");
|
---|
| 2645 | if (p)
|
---|
[1765] | 2646 | return xatoi(p);
|
---|
[821] | 2647 | else
|
---|
| 2648 | return 0;
|
---|
| 2649 | }
|
---|
| 2650 |
|
---|
| 2651 | /* Get the module's kernel version in the canonical integer form. */
|
---|
| 2652 |
|
---|
| 2653 | static int
|
---|
| 2654 | new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
|
---|
| 2655 | {
|
---|
| 2656 | char *p, *q;
|
---|
| 2657 | int a, b, c;
|
---|
| 2658 |
|
---|
| 2659 | p = get_modinfo_value(f, "kernel_version");
|
---|
| 2660 | if (p == NULL)
|
---|
| 2661 | return -1;
|
---|
| 2662 | safe_strncpy(str, p, STRVERSIONLEN);
|
---|
| 2663 |
|
---|
| 2664 | a = strtoul(p, &p, 10);
|
---|
| 2665 | if (*p != '.')
|
---|
| 2666 | return -1;
|
---|
| 2667 | b = strtoul(p + 1, &p, 10);
|
---|
| 2668 | if (*p != '.')
|
---|
| 2669 | return -1;
|
---|
| 2670 | c = strtoul(p + 1, &q, 10);
|
---|
| 2671 | if (p + 1 == q)
|
---|
| 2672 | return -1;
|
---|
| 2673 |
|
---|
| 2674 | return a << 16 | b << 8 | c;
|
---|
| 2675 | }
|
---|
| 2676 |
|
---|
[1765] | 2677 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
[821] | 2678 |
|
---|
| 2679 |
|
---|
| 2680 | /* Fetch the loaded modules, and all currently exported symbols. */
|
---|
| 2681 |
|
---|
| 2682 | static int new_get_kernel_symbols(void)
|
---|
| 2683 | {
|
---|
| 2684 | char *module_names, *mn;
|
---|
| 2685 | struct external_module *modules, *m;
|
---|
| 2686 | struct new_module_symbol *syms, *s;
|
---|
| 2687 | size_t ret, bufsize, nmod, nsyms, i, j;
|
---|
| 2688 |
|
---|
| 2689 | /* Collect the loaded modules. */
|
---|
| 2690 |
|
---|
| 2691 | module_names = xmalloc(bufsize = 256);
|
---|
| 2692 | retry_modules_load:
|
---|
| 2693 | if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) {
|
---|
| 2694 | if (errno == ENOSPC && bufsize < ret) {
|
---|
| 2695 | module_names = xrealloc(module_names, bufsize = ret);
|
---|
| 2696 | goto retry_modules_load;
|
---|
| 2697 | }
|
---|
| 2698 | bb_perror_msg("QM_MODULES");
|
---|
| 2699 | return 0;
|
---|
| 2700 | }
|
---|
| 2701 |
|
---|
| 2702 | n_ext_modules = nmod = ret;
|
---|
| 2703 |
|
---|
| 2704 | /* Collect the modules' symbols. */
|
---|
| 2705 |
|
---|
[1765] | 2706 | if (nmod) {
|
---|
[821] | 2707 | ext_modules = modules = xmalloc(nmod * sizeof(*modules));
|
---|
| 2708 | memset(modules, 0, nmod * sizeof(*modules));
|
---|
| 2709 | for (i = 0, mn = module_names, m = modules;
|
---|
| 2710 | i < nmod; ++i, ++m, mn += strlen(mn) + 1) {
|
---|
| 2711 | struct new_module_info info;
|
---|
| 2712 |
|
---|
| 2713 | if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) {
|
---|
| 2714 | if (errno == ENOENT) {
|
---|
| 2715 | /* The module was removed out from underneath us. */
|
---|
| 2716 | continue;
|
---|
| 2717 | }
|
---|
| 2718 | bb_perror_msg("query_module: QM_INFO: %s", mn);
|
---|
| 2719 | return 0;
|
---|
| 2720 | }
|
---|
| 2721 |
|
---|
| 2722 | syms = xmalloc(bufsize = 1024);
|
---|
| 2723 | retry_mod_sym_load:
|
---|
| 2724 | if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) {
|
---|
| 2725 | switch (errno) {
|
---|
| 2726 | case ENOSPC:
|
---|
| 2727 | syms = xrealloc(syms, bufsize = ret);
|
---|
| 2728 | goto retry_mod_sym_load;
|
---|
| 2729 | case ENOENT:
|
---|
| 2730 | /* The module was removed out from underneath us. */
|
---|
| 2731 | continue;
|
---|
| 2732 | default:
|
---|
| 2733 | bb_perror_msg("query_module: QM_SYMBOLS: %s", mn);
|
---|
| 2734 | return 0;
|
---|
| 2735 | }
|
---|
| 2736 | }
|
---|
| 2737 | nsyms = ret;
|
---|
| 2738 |
|
---|
| 2739 | m->name = mn;
|
---|
| 2740 | m->addr = info.addr;
|
---|
| 2741 | m->nsyms = nsyms;
|
---|
| 2742 | m->syms = syms;
|
---|
| 2743 |
|
---|
| 2744 | for (j = 0, s = syms; j < nsyms; ++j, ++s) {
|
---|
| 2745 | s->name += (unsigned long) syms;
|
---|
| 2746 | }
|
---|
| 2747 | }
|
---|
| 2748 | }
|
---|
| 2749 |
|
---|
| 2750 | /* Collect the kernel's symbols. */
|
---|
| 2751 |
|
---|
| 2752 | syms = xmalloc(bufsize = 16 * 1024);
|
---|
| 2753 | retry_kern_sym_load:
|
---|
| 2754 | if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) {
|
---|
| 2755 | if (errno == ENOSPC && bufsize < ret) {
|
---|
| 2756 | syms = xrealloc(syms, bufsize = ret);
|
---|
| 2757 | goto retry_kern_sym_load;
|
---|
| 2758 | }
|
---|
| 2759 | bb_perror_msg("kernel: QM_SYMBOLS");
|
---|
| 2760 | return 0;
|
---|
| 2761 | }
|
---|
| 2762 | nksyms = nsyms = ret;
|
---|
| 2763 | ksyms = syms;
|
---|
| 2764 |
|
---|
| 2765 | for (j = 0, s = syms; j < nsyms; ++j, ++s) {
|
---|
| 2766 | s->name += (unsigned long) syms;
|
---|
| 2767 | }
|
---|
| 2768 | return 1;
|
---|
| 2769 | }
|
---|
| 2770 |
|
---|
| 2771 |
|
---|
| 2772 | /* Return the kernel symbol checksum version, or zero if not used. */
|
---|
| 2773 |
|
---|
| 2774 | static int new_is_kernel_checksummed(void)
|
---|
| 2775 | {
|
---|
| 2776 | struct new_module_symbol *s;
|
---|
| 2777 | size_t i;
|
---|
| 2778 |
|
---|
| 2779 | /* Using_Versions is not the first symbol, but it should be in there. */
|
---|
| 2780 |
|
---|
| 2781 | for (i = 0, s = ksyms; i < nksyms; ++i, ++s)
|
---|
| 2782 | if (strcmp((char *) s->name, "Using_Versions") == 0)
|
---|
| 2783 | return s->value;
|
---|
| 2784 |
|
---|
| 2785 | return 0;
|
---|
| 2786 | }
|
---|
| 2787 |
|
---|
| 2788 |
|
---|
| 2789 | static int new_create_this_module(struct obj_file *f, const char *m_name)
|
---|
| 2790 | {
|
---|
| 2791 | struct obj_section *sec;
|
---|
| 2792 |
|
---|
| 2793 | sec = obj_create_alloced_section_first(f, ".this", tgt_sizeof_long,
|
---|
| 2794 | sizeof(struct new_module));
|
---|
| 2795 | memset(sec->contents, 0, sizeof(struct new_module));
|
---|
| 2796 |
|
---|
| 2797 | obj_add_symbol(f, SPFX "__this_module", -1,
|
---|
| 2798 | ELF_ST_INFO(STB_LOCAL, STT_OBJECT), sec->idx, 0,
|
---|
| 2799 | sizeof(struct new_module));
|
---|
| 2800 |
|
---|
| 2801 | obj_string_patch(f, sec->idx, offsetof(struct new_module, name),
|
---|
| 2802 | m_name);
|
---|
| 2803 |
|
---|
| 2804 | return 1;
|
---|
| 2805 | }
|
---|
| 2806 |
|
---|
[1765] | 2807 | #if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
|
---|
[821] | 2808 | /* add an entry to the __ksymtab section, creating it if necessary */
|
---|
| 2809 | static void new_add_ksymtab(struct obj_file *f, struct obj_symbol *sym)
|
---|
| 2810 | {
|
---|
| 2811 | struct obj_section *sec;
|
---|
| 2812 | ElfW(Addr) ofs;
|
---|
| 2813 |
|
---|
| 2814 | /* ensure __ksymtab is allocated, EXPORT_NOSYMBOLS creates a non-alloc section.
|
---|
| 2815 | * If __ksymtab is defined but not marked alloc, x out the first character
|
---|
| 2816 | * (no obj_delete routine) and create a new __ksymtab with the correct
|
---|
| 2817 | * characteristics.
|
---|
| 2818 | */
|
---|
| 2819 | sec = obj_find_section(f, "__ksymtab");
|
---|
| 2820 | if (sec && !(sec->header.sh_flags & SHF_ALLOC)) {
|
---|
| 2821 | *((char *)(sec->name)) = 'x'; /* override const */
|
---|
| 2822 | sec = NULL;
|
---|
| 2823 | }
|
---|
| 2824 | if (!sec)
|
---|
| 2825 | sec = obj_create_alloced_section(f, "__ksymtab",
|
---|
| 2826 | tgt_sizeof_void_p, 0);
|
---|
| 2827 | if (!sec)
|
---|
| 2828 | return;
|
---|
| 2829 | sec->header.sh_flags |= SHF_ALLOC;
|
---|
[1765] | 2830 | /* Empty section might be byte-aligned */
|
---|
| 2831 | sec->header.sh_addralign = tgt_sizeof_void_p;
|
---|
[821] | 2832 | ofs = sec->header.sh_size;
|
---|
| 2833 | obj_symbol_patch(f, sec->idx, ofs, sym);
|
---|
| 2834 | obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, sym->name);
|
---|
| 2835 | obj_extend_section(sec, 2 * tgt_sizeof_char_p);
|
---|
| 2836 | }
|
---|
[1765] | 2837 | #endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
|
---|
[821] | 2838 |
|
---|
| 2839 | static int new_create_module_ksymtab(struct obj_file *f)
|
---|
| 2840 | {
|
---|
| 2841 | struct obj_section *sec;
|
---|
| 2842 | int i;
|
---|
| 2843 |
|
---|
| 2844 | /* We must always add the module references. */
|
---|
| 2845 |
|
---|
| 2846 | if (n_ext_modules_used) {
|
---|
| 2847 | struct new_module_ref *dep;
|
---|
| 2848 | struct obj_symbol *tm;
|
---|
| 2849 |
|
---|
| 2850 | sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p,
|
---|
| 2851 | (sizeof(struct new_module_ref)
|
---|
| 2852 | * n_ext_modules_used));
|
---|
| 2853 | if (!sec)
|
---|
| 2854 | return 0;
|
---|
| 2855 |
|
---|
| 2856 | tm = obj_find_symbol(f, SPFX "__this_module");
|
---|
| 2857 | dep = (struct new_module_ref *) sec->contents;
|
---|
| 2858 | for (i = 0; i < n_ext_modules; ++i)
|
---|
| 2859 | if (ext_modules[i].used) {
|
---|
| 2860 | dep->dep = ext_modules[i].addr;
|
---|
| 2861 | obj_symbol_patch(f, sec->idx,
|
---|
| 2862 | (char *) &dep->ref - sec->contents, tm);
|
---|
| 2863 | dep->next_ref = 0;
|
---|
| 2864 | ++dep;
|
---|
| 2865 | }
|
---|
| 2866 | }
|
---|
| 2867 |
|
---|
[1765] | 2868 | if (!flag_noexport && !obj_find_section(f, "__ksymtab")) {
|
---|
[821] | 2869 | size_t nsyms;
|
---|
| 2870 | int *loaded;
|
---|
| 2871 |
|
---|
[1765] | 2872 | sec = obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, 0);
|
---|
[821] | 2873 |
|
---|
| 2874 | /* We don't want to export symbols residing in sections that
|
---|
| 2875 | aren't loaded. There are a number of these created so that
|
---|
| 2876 | we make sure certain module options don't appear twice. */
|
---|
| 2877 |
|
---|
| 2878 | loaded = alloca(sizeof(int) * (i = f->header.e_shnum));
|
---|
| 2879 | while (--i >= 0)
|
---|
| 2880 | loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0;
|
---|
| 2881 |
|
---|
| 2882 | for (nsyms = i = 0; i < HASH_BUCKETS; ++i) {
|
---|
| 2883 | struct obj_symbol *sym;
|
---|
| 2884 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 2885 | if (ELF_ST_BIND(sym->info) != STB_LOCAL
|
---|
| 2886 | && sym->secidx <= SHN_HIRESERVE
|
---|
| 2887 | && (sym->secidx >= SHN_LORESERVE
|
---|
| 2888 | || loaded[sym->secidx])) {
|
---|
| 2889 | ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p;
|
---|
| 2890 |
|
---|
| 2891 | obj_symbol_patch(f, sec->idx, ofs, sym);
|
---|
| 2892 | obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p,
|
---|
| 2893 | sym->name);
|
---|
| 2894 |
|
---|
| 2895 | nsyms++;
|
---|
| 2896 | }
|
---|
| 2897 | }
|
---|
| 2898 |
|
---|
| 2899 | obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p);
|
---|
| 2900 | }
|
---|
| 2901 |
|
---|
| 2902 | return 1;
|
---|
| 2903 | }
|
---|
| 2904 |
|
---|
| 2905 |
|
---|
| 2906 | static int
|
---|
| 2907 | new_init_module(const char *m_name, struct obj_file *f, unsigned long m_size)
|
---|
| 2908 | {
|
---|
| 2909 | struct new_module *module;
|
---|
| 2910 | struct obj_section *sec;
|
---|
| 2911 | void *image;
|
---|
| 2912 | int ret;
|
---|
| 2913 | tgt_long m_addr;
|
---|
| 2914 |
|
---|
| 2915 | sec = obj_find_section(f, ".this");
|
---|
| 2916 | if (!sec || !sec->contents) {
|
---|
| 2917 | bb_perror_msg_and_die("corrupt module %s?",m_name);
|
---|
| 2918 | }
|
---|
| 2919 | module = (struct new_module *) sec->contents;
|
---|
| 2920 | m_addr = sec->header.sh_addr;
|
---|
| 2921 |
|
---|
| 2922 | module->size_of_struct = sizeof(*module);
|
---|
| 2923 | module->size = m_size;
|
---|
| 2924 | module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0;
|
---|
| 2925 |
|
---|
| 2926 | sec = obj_find_section(f, "__ksymtab");
|
---|
| 2927 | if (sec && sec->header.sh_size) {
|
---|
| 2928 | module->syms = sec->header.sh_addr;
|
---|
| 2929 | module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p);
|
---|
| 2930 | }
|
---|
| 2931 |
|
---|
| 2932 | if (n_ext_modules_used) {
|
---|
| 2933 | sec = obj_find_section(f, ".kmodtab");
|
---|
| 2934 | module->deps = sec->header.sh_addr;
|
---|
| 2935 | module->ndeps = n_ext_modules_used;
|
---|
| 2936 | }
|
---|
| 2937 |
|
---|
| 2938 | module->init =
|
---|
| 2939 | obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module"));
|
---|
| 2940 | module->cleanup =
|
---|
| 2941 | obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module"));
|
---|
| 2942 |
|
---|
| 2943 | sec = obj_find_section(f, "__ex_table");
|
---|
| 2944 | if (sec) {
|
---|
| 2945 | module->ex_table_start = sec->header.sh_addr;
|
---|
| 2946 | module->ex_table_end = sec->header.sh_addr + sec->header.sh_size;
|
---|
| 2947 | }
|
---|
| 2948 |
|
---|
| 2949 | sec = obj_find_section(f, ".text.init");
|
---|
| 2950 | if (sec) {
|
---|
| 2951 | module->runsize = sec->header.sh_addr - m_addr;
|
---|
| 2952 | }
|
---|
| 2953 | sec = obj_find_section(f, ".data.init");
|
---|
| 2954 | if (sec) {
|
---|
| 2955 | if (!module->runsize ||
|
---|
| 2956 | module->runsize > sec->header.sh_addr - m_addr)
|
---|
| 2957 | module->runsize = sec->header.sh_addr - m_addr;
|
---|
| 2958 | }
|
---|
| 2959 | sec = obj_find_section(f, ARCHDATA_SEC_NAME);
|
---|
| 2960 | if (sec && sec->header.sh_size) {
|
---|
| 2961 | module->archdata_start = (void*)sec->header.sh_addr;
|
---|
| 2962 | module->archdata_end = module->archdata_start + sec->header.sh_size;
|
---|
| 2963 | }
|
---|
| 2964 | sec = obj_find_section(f, KALLSYMS_SEC_NAME);
|
---|
| 2965 | if (sec && sec->header.sh_size) {
|
---|
| 2966 | module->kallsyms_start = (void*)sec->header.sh_addr;
|
---|
| 2967 | module->kallsyms_end = module->kallsyms_start + sec->header.sh_size;
|
---|
| 2968 | }
|
---|
| 2969 |
|
---|
| 2970 | /* Whew! All of the initialization is complete. Collect the final
|
---|
| 2971 | module image and give it to the kernel. */
|
---|
| 2972 |
|
---|
| 2973 | image = xmalloc(m_size);
|
---|
| 2974 | obj_create_image(f, image);
|
---|
| 2975 |
|
---|
| 2976 | ret = init_module(m_name, (struct new_module *) image);
|
---|
| 2977 | if (ret)
|
---|
| 2978 | bb_perror_msg("init_module: %s", m_name);
|
---|
| 2979 |
|
---|
| 2980 | free(image);
|
---|
| 2981 |
|
---|
| 2982 | return ret == 0;
|
---|
| 2983 | }
|
---|
| 2984 |
|
---|
| 2985 |
|
---|
| 2986 | /*======================================================================*/
|
---|
| 2987 |
|
---|
| 2988 | static int
|
---|
| 2989 | obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
|
---|
| 2990 | const char *string)
|
---|
| 2991 | {
|
---|
| 2992 | struct obj_string_patch *p;
|
---|
| 2993 | struct obj_section *strsec;
|
---|
| 2994 | size_t len = strlen(string) + 1;
|
---|
| 2995 | char *loc;
|
---|
| 2996 |
|
---|
| 2997 | p = xmalloc(sizeof(*p));
|
---|
| 2998 | p->next = f->string_patches;
|
---|
| 2999 | p->reloc_secidx = secidx;
|
---|
| 3000 | p->reloc_offset = offset;
|
---|
| 3001 | f->string_patches = p;
|
---|
| 3002 |
|
---|
| 3003 | strsec = obj_find_section(f, ".kstrtab");
|
---|
| 3004 | if (strsec == NULL) {
|
---|
| 3005 | strsec = obj_create_alloced_section(f, ".kstrtab", 1, len);
|
---|
| 3006 | p->string_offset = 0;
|
---|
| 3007 | loc = strsec->contents;
|
---|
| 3008 | } else {
|
---|
| 3009 | p->string_offset = strsec->header.sh_size;
|
---|
| 3010 | loc = obj_extend_section(strsec, len);
|
---|
| 3011 | }
|
---|
| 3012 | memcpy(loc, string, len);
|
---|
| 3013 |
|
---|
| 3014 | return 1;
|
---|
| 3015 | }
|
---|
| 3016 |
|
---|
| 3017 | static int
|
---|
| 3018 | obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
|
---|
| 3019 | struct obj_symbol *sym)
|
---|
| 3020 | {
|
---|
| 3021 | struct obj_symbol_patch *p;
|
---|
| 3022 |
|
---|
| 3023 | p = xmalloc(sizeof(*p));
|
---|
| 3024 | p->next = f->symbol_patches;
|
---|
| 3025 | p->reloc_secidx = secidx;
|
---|
| 3026 | p->reloc_offset = offset;
|
---|
| 3027 | p->sym = sym;
|
---|
| 3028 | f->symbol_patches = p;
|
---|
| 3029 |
|
---|
| 3030 | return 1;
|
---|
| 3031 | }
|
---|
| 3032 |
|
---|
| 3033 | static int obj_check_undefineds(struct obj_file *f)
|
---|
| 3034 | {
|
---|
| 3035 | unsigned long i;
|
---|
| 3036 | int ret = 1;
|
---|
| 3037 |
|
---|
| 3038 | for (i = 0; i < HASH_BUCKETS; ++i) {
|
---|
| 3039 | struct obj_symbol *sym;
|
---|
| 3040 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 3041 | if (sym->secidx == SHN_UNDEF) {
|
---|
| 3042 | if (ELF_ST_BIND(sym->info) == STB_WEAK) {
|
---|
| 3043 | sym->secidx = SHN_ABS;
|
---|
| 3044 | sym->value = 0;
|
---|
| 3045 | } else {
|
---|
| 3046 | if (!flag_quiet) {
|
---|
| 3047 | bb_error_msg("unresolved symbol %s", sym->name);
|
---|
| 3048 | }
|
---|
| 3049 | ret = 0;
|
---|
| 3050 | }
|
---|
| 3051 | }
|
---|
| 3052 | }
|
---|
| 3053 |
|
---|
| 3054 | return ret;
|
---|
| 3055 | }
|
---|
| 3056 |
|
---|
| 3057 | static void obj_allocate_commons(struct obj_file *f)
|
---|
| 3058 | {
|
---|
| 3059 | struct common_entry {
|
---|
| 3060 | struct common_entry *next;
|
---|
| 3061 | struct obj_symbol *sym;
|
---|
| 3062 | } *common_head = NULL;
|
---|
| 3063 |
|
---|
| 3064 | unsigned long i;
|
---|
| 3065 |
|
---|
| 3066 | for (i = 0; i < HASH_BUCKETS; ++i) {
|
---|
| 3067 | struct obj_symbol *sym;
|
---|
| 3068 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 3069 | if (sym->secidx == SHN_COMMON) {
|
---|
| 3070 | /* Collect all COMMON symbols and sort them by size so as to
|
---|
| 3071 | minimize space wasted by alignment requirements. */
|
---|
| 3072 | {
|
---|
| 3073 | struct common_entry **p, *n;
|
---|
| 3074 | for (p = &common_head; *p; p = &(*p)->next)
|
---|
| 3075 | if (sym->size <= (*p)->sym->size)
|
---|
| 3076 | break;
|
---|
| 3077 |
|
---|
| 3078 | n = alloca(sizeof(*n));
|
---|
| 3079 | n->next = *p;
|
---|
| 3080 | n->sym = sym;
|
---|
| 3081 | *p = n;
|
---|
| 3082 | }
|
---|
| 3083 | }
|
---|
| 3084 | }
|
---|
| 3085 |
|
---|
| 3086 | for (i = 1; i < f->local_symtab_size; ++i) {
|
---|
| 3087 | struct obj_symbol *sym = f->local_symtab[i];
|
---|
| 3088 | if (sym && sym->secidx == SHN_COMMON) {
|
---|
| 3089 | struct common_entry **p, *n;
|
---|
| 3090 | for (p = &common_head; *p; p = &(*p)->next)
|
---|
| 3091 | if (sym == (*p)->sym)
|
---|
| 3092 | break;
|
---|
| 3093 | else if (sym->size < (*p)->sym->size) {
|
---|
| 3094 | n = alloca(sizeof(*n));
|
---|
| 3095 | n->next = *p;
|
---|
| 3096 | n->sym = sym;
|
---|
| 3097 | *p = n;
|
---|
| 3098 | break;
|
---|
| 3099 | }
|
---|
| 3100 | }
|
---|
| 3101 | }
|
---|
| 3102 |
|
---|
| 3103 | if (common_head) {
|
---|
| 3104 | /* Find the bss section. */
|
---|
| 3105 | for (i = 0; i < f->header.e_shnum; ++i)
|
---|
| 3106 | if (f->sections[i]->header.sh_type == SHT_NOBITS)
|
---|
| 3107 | break;
|
---|
| 3108 |
|
---|
| 3109 | /* If for some reason there hadn't been one, create one. */
|
---|
| 3110 | if (i == f->header.e_shnum) {
|
---|
| 3111 | struct obj_section *sec;
|
---|
| 3112 |
|
---|
| 3113 | f->sections = xrealloc(f->sections, (i + 1) * sizeof(sec));
|
---|
| 3114 | f->sections[i] = sec = arch_new_section();
|
---|
| 3115 | f->header.e_shnum = i + 1;
|
---|
| 3116 |
|
---|
| 3117 | memset(sec, 0, sizeof(*sec));
|
---|
| 3118 | sec->header.sh_type = SHT_PROGBITS;
|
---|
| 3119 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
|
---|
| 3120 | sec->name = ".bss";
|
---|
| 3121 | sec->idx = i;
|
---|
| 3122 | }
|
---|
| 3123 |
|
---|
| 3124 | /* Allocate the COMMONS. */
|
---|
| 3125 | {
|
---|
| 3126 | ElfW(Addr) bss_size = f->sections[i]->header.sh_size;
|
---|
| 3127 | ElfW(Addr) max_align = f->sections[i]->header.sh_addralign;
|
---|
| 3128 | struct common_entry *c;
|
---|
| 3129 |
|
---|
| 3130 | for (c = common_head; c; c = c->next) {
|
---|
| 3131 | ElfW(Addr) align = c->sym->value;
|
---|
| 3132 |
|
---|
| 3133 | if (align > max_align)
|
---|
| 3134 | max_align = align;
|
---|
| 3135 | if (bss_size & (align - 1))
|
---|
| 3136 | bss_size = (bss_size | (align - 1)) + 1;
|
---|
| 3137 |
|
---|
| 3138 | c->sym->secidx = i;
|
---|
| 3139 | c->sym->value = bss_size;
|
---|
| 3140 |
|
---|
| 3141 | bss_size += c->sym->size;
|
---|
| 3142 | }
|
---|
| 3143 |
|
---|
| 3144 | f->sections[i]->header.sh_size = bss_size;
|
---|
| 3145 | f->sections[i]->header.sh_addralign = max_align;
|
---|
| 3146 | }
|
---|
| 3147 | }
|
---|
| 3148 |
|
---|
| 3149 | /* For the sake of patch relocation and parameter initialization,
|
---|
| 3150 | allocate zeroed data for NOBITS sections now. Note that after
|
---|
| 3151 | this we cannot assume NOBITS are really empty. */
|
---|
| 3152 | for (i = 0; i < f->header.e_shnum; ++i) {
|
---|
| 3153 | struct obj_section *s = f->sections[i];
|
---|
| 3154 | if (s->header.sh_type == SHT_NOBITS) {
|
---|
| 3155 | if (s->header.sh_size != 0)
|
---|
| 3156 | s->contents = memset(xmalloc(s->header.sh_size),
|
---|
| 3157 | 0, s->header.sh_size);
|
---|
| 3158 | else
|
---|
| 3159 | s->contents = NULL;
|
---|
| 3160 |
|
---|
| 3161 | s->header.sh_type = SHT_PROGBITS;
|
---|
| 3162 | }
|
---|
| 3163 | }
|
---|
| 3164 | }
|
---|
| 3165 |
|
---|
| 3166 | static unsigned long obj_load_size(struct obj_file *f)
|
---|
| 3167 | {
|
---|
| 3168 | unsigned long dot = 0;
|
---|
| 3169 | struct obj_section *sec;
|
---|
| 3170 |
|
---|
| 3171 | /* Finalize the positions of the sections relative to one another. */
|
---|
| 3172 |
|
---|
| 3173 | for (sec = f->load_order; sec; sec = sec->load_next) {
|
---|
| 3174 | ElfW(Addr) align;
|
---|
| 3175 |
|
---|
| 3176 | align = sec->header.sh_addralign;
|
---|
| 3177 | if (align && (dot & (align - 1)))
|
---|
| 3178 | dot = (dot | (align - 1)) + 1;
|
---|
| 3179 |
|
---|
| 3180 | sec->header.sh_addr = dot;
|
---|
| 3181 | dot += sec->header.sh_size;
|
---|
| 3182 | }
|
---|
| 3183 |
|
---|
| 3184 | return dot;
|
---|
| 3185 | }
|
---|
| 3186 |
|
---|
| 3187 | static int obj_relocate(struct obj_file *f, ElfW(Addr) base)
|
---|
| 3188 | {
|
---|
| 3189 | int i, n = f->header.e_shnum;
|
---|
| 3190 | int ret = 1;
|
---|
| 3191 |
|
---|
| 3192 | /* Finalize the addresses of the sections. */
|
---|
| 3193 |
|
---|
| 3194 | f->baseaddr = base;
|
---|
| 3195 | for (i = 0; i < n; ++i)
|
---|
| 3196 | f->sections[i]->header.sh_addr += base;
|
---|
| 3197 |
|
---|
| 3198 | /* And iterate over all of the relocations. */
|
---|
| 3199 |
|
---|
| 3200 | for (i = 0; i < n; ++i) {
|
---|
| 3201 | struct obj_section *relsec, *symsec, *targsec, *strsec;
|
---|
| 3202 | ElfW(RelM) * rel, *relend;
|
---|
| 3203 | ElfW(Sym) * symtab;
|
---|
| 3204 | const char *strtab;
|
---|
| 3205 |
|
---|
| 3206 | relsec = f->sections[i];
|
---|
| 3207 | if (relsec->header.sh_type != SHT_RELM)
|
---|
| 3208 | continue;
|
---|
| 3209 |
|
---|
| 3210 | symsec = f->sections[relsec->header.sh_link];
|
---|
| 3211 | targsec = f->sections[relsec->header.sh_info];
|
---|
| 3212 | strsec = f->sections[symsec->header.sh_link];
|
---|
| 3213 |
|
---|
| 3214 | rel = (ElfW(RelM) *) relsec->contents;
|
---|
| 3215 | relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM)));
|
---|
| 3216 | symtab = (ElfW(Sym) *) symsec->contents;
|
---|
| 3217 | strtab = (const char *) strsec->contents;
|
---|
| 3218 |
|
---|
| 3219 | for (; rel < relend; ++rel) {
|
---|
| 3220 | ElfW(Addr) value = 0;
|
---|
| 3221 | struct obj_symbol *intsym = NULL;
|
---|
| 3222 | unsigned long symndx;
|
---|
| 3223 | ElfW(Sym) * extsym = 0;
|
---|
| 3224 | const char *errmsg;
|
---|
| 3225 |
|
---|
| 3226 | /* Attempt to find a value to use for this relocation. */
|
---|
| 3227 |
|
---|
| 3228 | symndx = ELF_R_SYM(rel->r_info);
|
---|
| 3229 | if (symndx) {
|
---|
| 3230 | /* Note we've already checked for undefined symbols. */
|
---|
| 3231 |
|
---|
| 3232 | extsym = &symtab[symndx];
|
---|
| 3233 | if (ELF_ST_BIND(extsym->st_info) == STB_LOCAL) {
|
---|
| 3234 | /* Local symbols we look up in the local table to be sure
|
---|
| 3235 | we get the one that is really intended. */
|
---|
| 3236 | intsym = f->local_symtab[symndx];
|
---|
| 3237 | } else {
|
---|
| 3238 | /* Others we look up in the hash table. */
|
---|
| 3239 | const char *name;
|
---|
| 3240 | if (extsym->st_name)
|
---|
| 3241 | name = strtab + extsym->st_name;
|
---|
| 3242 | else
|
---|
| 3243 | name = f->sections[extsym->st_shndx]->name;
|
---|
| 3244 | intsym = obj_find_symbol(f, name);
|
---|
| 3245 | }
|
---|
| 3246 |
|
---|
| 3247 | value = obj_symbol_final_value(f, intsym);
|
---|
| 3248 | intsym->referenced = 1;
|
---|
| 3249 | }
|
---|
| 3250 | #if SHT_RELM == SHT_RELA
|
---|
| 3251 | #if defined(__alpha__) && defined(AXP_BROKEN_GAS)
|
---|
| 3252 | /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */
|
---|
| 3253 | if (!extsym || !extsym->st_name ||
|
---|
| 3254 | ELF_ST_BIND(extsym->st_info) != STB_LOCAL)
|
---|
| 3255 | #endif
|
---|
| 3256 | value += rel->r_addend;
|
---|
| 3257 | #endif
|
---|
| 3258 |
|
---|
| 3259 | /* Do it! */
|
---|
| 3260 | switch (arch_apply_relocation
|
---|
[1765] | 3261 | (f, targsec, symsec, intsym, rel, value)
|
---|
| 3262 | ) {
|
---|
| 3263 | case obj_reloc_ok:
|
---|
| 3264 | break;
|
---|
[821] | 3265 |
|
---|
[1765] | 3266 | case obj_reloc_overflow:
|
---|
| 3267 | errmsg = "Relocation overflow";
|
---|
| 3268 | goto bad_reloc;
|
---|
| 3269 | case obj_reloc_dangerous:
|
---|
| 3270 | errmsg = "Dangerous relocation";
|
---|
| 3271 | goto bad_reloc;
|
---|
| 3272 | case obj_reloc_unhandled:
|
---|
| 3273 | errmsg = "Unhandled relocation";
|
---|
[821] | 3274 | bad_reloc:
|
---|
[1765] | 3275 | if (extsym) {
|
---|
| 3276 | bb_error_msg("%s of type %ld for %s", errmsg,
|
---|
| 3277 | (long) ELF_R_TYPE(rel->r_info),
|
---|
| 3278 | strtab + extsym->st_name);
|
---|
| 3279 | } else {
|
---|
| 3280 | bb_error_msg("%s of type %ld", errmsg,
|
---|
| 3281 | (long) ELF_R_TYPE(rel->r_info));
|
---|
| 3282 | }
|
---|
| 3283 | ret = 0;
|
---|
| 3284 | break;
|
---|
[821] | 3285 | }
|
---|
| 3286 | }
|
---|
| 3287 | }
|
---|
| 3288 |
|
---|
| 3289 | /* Finally, take care of the patches. */
|
---|
| 3290 |
|
---|
| 3291 | if (f->string_patches) {
|
---|
| 3292 | struct obj_string_patch *p;
|
---|
| 3293 | struct obj_section *strsec;
|
---|
| 3294 | ElfW(Addr) strsec_base;
|
---|
| 3295 | strsec = obj_find_section(f, ".kstrtab");
|
---|
| 3296 | strsec_base = strsec->header.sh_addr;
|
---|
| 3297 |
|
---|
| 3298 | for (p = f->string_patches; p; p = p->next) {
|
---|
| 3299 | struct obj_section *targsec = f->sections[p->reloc_secidx];
|
---|
| 3300 | *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
|
---|
| 3301 | = strsec_base + p->string_offset;
|
---|
| 3302 | }
|
---|
| 3303 | }
|
---|
| 3304 |
|
---|
| 3305 | if (f->symbol_patches) {
|
---|
| 3306 | struct obj_symbol_patch *p;
|
---|
| 3307 |
|
---|
| 3308 | for (p = f->symbol_patches; p; p = p->next) {
|
---|
| 3309 | struct obj_section *targsec = f->sections[p->reloc_secidx];
|
---|
| 3310 | *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
|
---|
| 3311 | = obj_symbol_final_value(f, p->sym);
|
---|
| 3312 | }
|
---|
| 3313 | }
|
---|
| 3314 |
|
---|
| 3315 | return ret;
|
---|
| 3316 | }
|
---|
| 3317 |
|
---|
| 3318 | static int obj_create_image(struct obj_file *f, char *image)
|
---|
| 3319 | {
|
---|
| 3320 | struct obj_section *sec;
|
---|
| 3321 | ElfW(Addr) base = f->baseaddr;
|
---|
| 3322 |
|
---|
| 3323 | for (sec = f->load_order; sec; sec = sec->load_next) {
|
---|
| 3324 | char *secimg;
|
---|
| 3325 |
|
---|
| 3326 | if (sec->contents == 0 || sec->header.sh_size == 0)
|
---|
| 3327 | continue;
|
---|
| 3328 |
|
---|
| 3329 | secimg = image + (sec->header.sh_addr - base);
|
---|
| 3330 |
|
---|
| 3331 | /* Note that we allocated data for NOBITS sections earlier. */
|
---|
| 3332 | memcpy(secimg, sec->contents, sec->header.sh_size);
|
---|
| 3333 | }
|
---|
| 3334 |
|
---|
| 3335 | return 1;
|
---|
| 3336 | }
|
---|
| 3337 |
|
---|
| 3338 | /*======================================================================*/
|
---|
| 3339 |
|
---|
| 3340 | static struct obj_file *obj_load(FILE * fp, int loadprogbits)
|
---|
| 3341 | {
|
---|
| 3342 | struct obj_file *f;
|
---|
| 3343 | ElfW(Shdr) * section_headers;
|
---|
| 3344 | int shnum, i;
|
---|
| 3345 | char *shstrtab;
|
---|
| 3346 |
|
---|
| 3347 | /* Read the file header. */
|
---|
| 3348 |
|
---|
| 3349 | f = arch_new_file();
|
---|
| 3350 | memset(f, 0, sizeof(*f));
|
---|
| 3351 | f->symbol_cmp = strcmp;
|
---|
| 3352 | f->symbol_hash = obj_elf_hash;
|
---|
| 3353 | f->load_order_search_start = &f->load_order;
|
---|
| 3354 |
|
---|
| 3355 | fseek(fp, 0, SEEK_SET);
|
---|
| 3356 | if (fread(&f->header, sizeof(f->header), 1, fp) != 1) {
|
---|
| 3357 | bb_perror_msg("error reading ELF header");
|
---|
| 3358 | return NULL;
|
---|
| 3359 | }
|
---|
| 3360 |
|
---|
| 3361 | if (f->header.e_ident[EI_MAG0] != ELFMAG0
|
---|
| 3362 | || f->header.e_ident[EI_MAG1] != ELFMAG1
|
---|
| 3363 | || f->header.e_ident[EI_MAG2] != ELFMAG2
|
---|
| 3364 | || f->header.e_ident[EI_MAG3] != ELFMAG3) {
|
---|
| 3365 | bb_error_msg("not an ELF file");
|
---|
| 3366 | return NULL;
|
---|
| 3367 | }
|
---|
| 3368 | if (f->header.e_ident[EI_CLASS] != ELFCLASSM
|
---|
| 3369 | || f->header.e_ident[EI_DATA] != (BB_BIG_ENDIAN
|
---|
| 3370 | ? ELFDATA2MSB : ELFDATA2LSB)
|
---|
| 3371 | || f->header.e_ident[EI_VERSION] != EV_CURRENT
|
---|
| 3372 | || !MATCH_MACHINE(f->header.e_machine)) {
|
---|
| 3373 | bb_error_msg("ELF file not for this architecture");
|
---|
| 3374 | return NULL;
|
---|
| 3375 | }
|
---|
| 3376 | if (f->header.e_type != ET_REL) {
|
---|
| 3377 | bb_error_msg("ELF file not a relocatable object");
|
---|
| 3378 | return NULL;
|
---|
| 3379 | }
|
---|
| 3380 |
|
---|
| 3381 | /* Read the section headers. */
|
---|
| 3382 |
|
---|
| 3383 | if (f->header.e_shentsize != sizeof(ElfW(Shdr))) {
|
---|
| 3384 | bb_error_msg("section header size mismatch: %lu != %lu",
|
---|
| 3385 | (unsigned long) f->header.e_shentsize,
|
---|
| 3386 | (unsigned long) sizeof(ElfW(Shdr)));
|
---|
| 3387 | return NULL;
|
---|
| 3388 | }
|
---|
| 3389 |
|
---|
| 3390 | shnum = f->header.e_shnum;
|
---|
| 3391 | f->sections = xmalloc(sizeof(struct obj_section *) * shnum);
|
---|
| 3392 | memset(f->sections, 0, sizeof(struct obj_section *) * shnum);
|
---|
| 3393 |
|
---|
| 3394 | section_headers = alloca(sizeof(ElfW(Shdr)) * shnum);
|
---|
| 3395 | fseek(fp, f->header.e_shoff, SEEK_SET);
|
---|
| 3396 | if (fread(section_headers, sizeof(ElfW(Shdr)), shnum, fp) != shnum) {
|
---|
| 3397 | bb_perror_msg("error reading ELF section headers");
|
---|
| 3398 | return NULL;
|
---|
| 3399 | }
|
---|
| 3400 |
|
---|
| 3401 | /* Read the section data. */
|
---|
| 3402 |
|
---|
| 3403 | for (i = 0; i < shnum; ++i) {
|
---|
| 3404 | struct obj_section *sec;
|
---|
| 3405 |
|
---|
| 3406 | f->sections[i] = sec = arch_new_section();
|
---|
| 3407 | memset(sec, 0, sizeof(*sec));
|
---|
| 3408 |
|
---|
| 3409 | sec->header = section_headers[i];
|
---|
| 3410 | sec->idx = i;
|
---|
| 3411 |
|
---|
[1765] | 3412 | if (sec->header.sh_size) {
|
---|
| 3413 | switch (sec->header.sh_type) {
|
---|
[821] | 3414 | case SHT_NULL:
|
---|
| 3415 | case SHT_NOTE:
|
---|
| 3416 | case SHT_NOBITS:
|
---|
| 3417 | /* ignore */
|
---|
| 3418 | break;
|
---|
| 3419 |
|
---|
| 3420 | case SHT_PROGBITS:
|
---|
| 3421 | #if LOADBITS
|
---|
| 3422 | if (!loadprogbits) {
|
---|
| 3423 | sec->contents = NULL;
|
---|
| 3424 | break;
|
---|
| 3425 | }
|
---|
| 3426 | #endif
|
---|
| 3427 | case SHT_SYMTAB:
|
---|
| 3428 | case SHT_STRTAB:
|
---|
| 3429 | case SHT_RELM:
|
---|
| 3430 | if (sec->header.sh_size > 0) {
|
---|
| 3431 | sec->contents = xmalloc(sec->header.sh_size);
|
---|
| 3432 | fseek(fp, sec->header.sh_offset, SEEK_SET);
|
---|
| 3433 | if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) {
|
---|
| 3434 | bb_perror_msg("error reading ELF section data");
|
---|
| 3435 | return NULL;
|
---|
| 3436 | }
|
---|
| 3437 | } else {
|
---|
| 3438 | sec->contents = NULL;
|
---|
| 3439 | }
|
---|
| 3440 | break;
|
---|
| 3441 |
|
---|
| 3442 | #if SHT_RELM == SHT_REL
|
---|
| 3443 | case SHT_RELA:
|
---|
| 3444 | bb_error_msg("RELA relocations not supported on this architecture");
|
---|
| 3445 | return NULL;
|
---|
| 3446 | #else
|
---|
| 3447 | case SHT_REL:
|
---|
| 3448 | bb_error_msg("REL relocations not supported on this architecture");
|
---|
| 3449 | return NULL;
|
---|
| 3450 | #endif
|
---|
| 3451 |
|
---|
| 3452 | default:
|
---|
| 3453 | if (sec->header.sh_type >= SHT_LOPROC) {
|
---|
| 3454 | /* Assume processor specific section types are debug
|
---|
| 3455 | info and can safely be ignored. If this is ever not
|
---|
| 3456 | the case (Hello MIPS?), don't put ifdefs here but
|
---|
| 3457 | create an arch_load_proc_section(). */
|
---|
| 3458 | break;
|
---|
| 3459 | }
|
---|
| 3460 |
|
---|
| 3461 | bb_error_msg("can't handle sections of type %ld",
|
---|
| 3462 | (long) sec->header.sh_type);
|
---|
| 3463 | return NULL;
|
---|
[1765] | 3464 | }
|
---|
[821] | 3465 | }
|
---|
| 3466 | }
|
---|
| 3467 |
|
---|
| 3468 | /* Do what sort of interpretation as needed by each section. */
|
---|
| 3469 |
|
---|
| 3470 | shstrtab = f->sections[f->header.e_shstrndx]->contents;
|
---|
| 3471 |
|
---|
| 3472 | for (i = 0; i < shnum; ++i) {
|
---|
| 3473 | struct obj_section *sec = f->sections[i];
|
---|
| 3474 | sec->name = shstrtab + sec->header.sh_name;
|
---|
| 3475 | }
|
---|
| 3476 |
|
---|
| 3477 | for (i = 0; i < shnum; ++i) {
|
---|
| 3478 | struct obj_section *sec = f->sections[i];
|
---|
| 3479 |
|
---|
| 3480 | /* .modinfo should be contents only but gcc has no attribute for that.
|
---|
| 3481 | * The kernel may have marked .modinfo as ALLOC, ignore this bit.
|
---|
| 3482 | */
|
---|
| 3483 | if (strcmp(sec->name, ".modinfo") == 0)
|
---|
| 3484 | sec->header.sh_flags &= ~SHF_ALLOC;
|
---|
| 3485 |
|
---|
| 3486 | if (sec->header.sh_flags & SHF_ALLOC)
|
---|
| 3487 | obj_insert_section_load_order(f, sec);
|
---|
| 3488 |
|
---|
| 3489 | switch (sec->header.sh_type) {
|
---|
[1765] | 3490 | case SHT_SYMTAB:
|
---|
| 3491 | {
|
---|
| 3492 | unsigned long nsym, j;
|
---|
| 3493 | char *strtab;
|
---|
| 3494 | ElfW(Sym) * sym;
|
---|
[821] | 3495 |
|
---|
[1765] | 3496 | if (sec->header.sh_entsize != sizeof(ElfW(Sym))) {
|
---|
| 3497 | bb_error_msg("symbol size mismatch: %lu != %lu",
|
---|
| 3498 | (unsigned long) sec->header.sh_entsize,
|
---|
| 3499 | (unsigned long) sizeof(ElfW(Sym)));
|
---|
| 3500 | return NULL;
|
---|
| 3501 | }
|
---|
[821] | 3502 |
|
---|
[1765] | 3503 | nsym = sec->header.sh_size / sizeof(ElfW(Sym));
|
---|
| 3504 | strtab = f->sections[sec->header.sh_link]->contents;
|
---|
| 3505 | sym = (ElfW(Sym) *) sec->contents;
|
---|
[821] | 3506 |
|
---|
[1765] | 3507 | /* Allocate space for a table of local symbols. */
|
---|
| 3508 | j = f->local_symtab_size = sec->header.sh_info;
|
---|
| 3509 | f->local_symtab = xzalloc(j * sizeof(struct obj_symbol *));
|
---|
[821] | 3510 |
|
---|
[1765] | 3511 | /* Insert all symbols into the hash table. */
|
---|
| 3512 | for (j = 1, ++sym; j < nsym; ++j, ++sym) {
|
---|
| 3513 | ElfW(Addr) val = sym->st_value;
|
---|
| 3514 | const char *name;
|
---|
| 3515 | if (sym->st_name)
|
---|
| 3516 | name = strtab + sym->st_name;
|
---|
| 3517 | else if (sym->st_shndx < shnum)
|
---|
| 3518 | name = f->sections[sym->st_shndx]->name;
|
---|
| 3519 | else
|
---|
| 3520 | continue;
|
---|
[821] | 3521 | #if defined(__SH5__)
|
---|
[1765] | 3522 | /*
|
---|
| 3523 | * For sh64 it is possible that the target of a branch
|
---|
| 3524 | * requires a mode switch (32 to 16 and back again).
|
---|
| 3525 | *
|
---|
| 3526 | * This is implied by the lsb being set in the target
|
---|
| 3527 | * address for SHmedia mode and clear for SHcompact.
|
---|
| 3528 | */
|
---|
| 3529 | val |= sym->st_other & 4;
|
---|
[821] | 3530 | #endif
|
---|
| 3531 |
|
---|
[1765] | 3532 | obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx,
|
---|
| 3533 | val, sym->st_size);
|
---|
[821] | 3534 | }
|
---|
[1765] | 3535 | }
|
---|
| 3536 | break;
|
---|
[821] | 3537 |
|
---|
[1765] | 3538 | case SHT_RELM:
|
---|
| 3539 | if (sec->header.sh_entsize != sizeof(ElfW(RelM))) {
|
---|
| 3540 | bb_error_msg("relocation entry size mismatch: %lu != %lu",
|
---|
| 3541 | (unsigned long) sec->header.sh_entsize,
|
---|
| 3542 | (unsigned long) sizeof(ElfW(RelM)));
|
---|
| 3543 | return NULL;
|
---|
| 3544 | }
|
---|
| 3545 | break;
|
---|
| 3546 | /* XXX Relocation code from modutils-2.3.19 is not here.
|
---|
| 3547 | * Why? That's about 20 lines of code from obj/obj_load.c,
|
---|
| 3548 | * which gets done in a second pass through the sections.
|
---|
| 3549 | * This BusyBox insmod does similar work in obj_relocate(). */
|
---|
[821] | 3550 | }
|
---|
| 3551 | }
|
---|
| 3552 |
|
---|
| 3553 | return f;
|
---|
| 3554 | }
|
---|
| 3555 |
|
---|
[1765] | 3556 | #if ENABLE_FEATURE_INSMOD_LOADINKMEM
|
---|
[821] | 3557 | /*
|
---|
| 3558 | * load the unloaded sections directly into the memory allocated by
|
---|
| 3559 | * kernel for the module
|
---|
| 3560 | */
|
---|
| 3561 |
|
---|
| 3562 | static int obj_load_progbits(FILE * fp, struct obj_file* f, char* imagebase)
|
---|
| 3563 | {
|
---|
| 3564 | ElfW(Addr) base = f->baseaddr;
|
---|
| 3565 | struct obj_section* sec;
|
---|
| 3566 |
|
---|
| 3567 | for (sec = f->load_order; sec; sec = sec->load_next) {
|
---|
| 3568 |
|
---|
| 3569 | /* section already loaded? */
|
---|
| 3570 | if (sec->contents != NULL)
|
---|
| 3571 | continue;
|
---|
| 3572 |
|
---|
| 3573 | if (sec->header.sh_size == 0)
|
---|
| 3574 | continue;
|
---|
| 3575 |
|
---|
| 3576 | sec->contents = imagebase + (sec->header.sh_addr - base);
|
---|
| 3577 | fseek(fp, sec->header.sh_offset, SEEK_SET);
|
---|
| 3578 | if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) {
|
---|
[1765] | 3579 | bb_perror_msg("error reading ELF section data");
|
---|
[821] | 3580 | return 0;
|
---|
| 3581 | }
|
---|
| 3582 |
|
---|
| 3583 | }
|
---|
| 3584 | return 1;
|
---|
| 3585 | }
|
---|
| 3586 | #endif
|
---|
| 3587 |
|
---|
| 3588 | static void hide_special_symbols(struct obj_file *f)
|
---|
| 3589 | {
|
---|
| 3590 | static const char *const specials[] = {
|
---|
| 3591 | SPFX "cleanup_module",
|
---|
| 3592 | SPFX "init_module",
|
---|
| 3593 | SPFX "kernel_version",
|
---|
| 3594 | NULL
|
---|
| 3595 | };
|
---|
| 3596 |
|
---|
| 3597 | struct obj_symbol *sym;
|
---|
| 3598 | const char *const *p;
|
---|
| 3599 |
|
---|
[1765] | 3600 | for (p = specials; *p; ++p) {
|
---|
| 3601 | sym = obj_find_symbol(f, *p);
|
---|
| 3602 | if (sym != NULL)
|
---|
| 3603 | sym->info = ELF_ST_INFO(STB_LOCAL, ELF_ST_TYPE(sym->info));
|
---|
| 3604 | }
|
---|
[821] | 3605 | }
|
---|
| 3606 |
|
---|
| 3607 |
|
---|
[1765] | 3608 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
|
---|
[821] | 3609 | static int obj_gpl_license(struct obj_file *f, const char **license)
|
---|
| 3610 | {
|
---|
| 3611 | struct obj_section *sec;
|
---|
| 3612 | /* This list must match *exactly* the list of allowable licenses in
|
---|
| 3613 | * linux/include/linux/module.h. Checking for leading "GPL" will not
|
---|
| 3614 | * work, somebody will use "GPL sucks, this is proprietary".
|
---|
| 3615 | */
|
---|
[1765] | 3616 | static const char *const gpl_licenses[] = {
|
---|
[821] | 3617 | "GPL",
|
---|
| 3618 | "GPL v2",
|
---|
| 3619 | "GPL and additional rights",
|
---|
| 3620 | "Dual BSD/GPL",
|
---|
[1765] | 3621 | "Dual MPL/GPL"
|
---|
[821] | 3622 | };
|
---|
| 3623 |
|
---|
[1765] | 3624 | sec = obj_find_section(f, ".modinfo");
|
---|
| 3625 | if (sec) {
|
---|
[821] | 3626 | const char *value, *ptr, *endptr;
|
---|
| 3627 | ptr = sec->contents;
|
---|
| 3628 | endptr = ptr + sec->header.sh_size;
|
---|
| 3629 | while (ptr < endptr) {
|
---|
[1765] | 3630 | value = strchr(ptr, '=');
|
---|
| 3631 | if (value && strncmp(ptr, "license", value-ptr) == 0) {
|
---|
[821] | 3632 | int i;
|
---|
| 3633 | if (license)
|
---|
| 3634 | *license = value+1;
|
---|
[1765] | 3635 | for (i = 0; i < ARRAY_SIZE(gpl_licenses); ++i) {
|
---|
[821] | 3636 | if (strcmp(value+1, gpl_licenses[i]) == 0)
|
---|
[1765] | 3637 | return 0;
|
---|
[821] | 3638 | }
|
---|
[1765] | 3639 | return 2;
|
---|
[821] | 3640 | }
|
---|
| 3641 | if (strchr(ptr, '\0'))
|
---|
| 3642 | ptr = strchr(ptr, '\0') + 1;
|
---|
| 3643 | else
|
---|
| 3644 | ptr = endptr;
|
---|
| 3645 | }
|
---|
| 3646 | }
|
---|
[1765] | 3647 | return 1;
|
---|
[821] | 3648 | }
|
---|
| 3649 |
|
---|
| 3650 | #define TAINT_FILENAME "/proc/sys/kernel/tainted"
|
---|
| 3651 | #define TAINT_PROPRIETORY_MODULE (1<<0)
|
---|
| 3652 | #define TAINT_FORCED_MODULE (1<<1)
|
---|
| 3653 | #define TAINT_UNSAFE_SMP (1<<2)
|
---|
| 3654 | #define TAINT_URL "http://www.tux.org/lkml/#export-tainted"
|
---|
| 3655 |
|
---|
| 3656 | static void set_tainted(struct obj_file *f, int fd, char *m_name,
|
---|
| 3657 | int kernel_has_tainted, int taint, const char *text1, const char *text2)
|
---|
| 3658 | {
|
---|
[1765] | 3659 | static smallint printed_info;
|
---|
| 3660 |
|
---|
[821] | 3661 | char buf[80];
|
---|
| 3662 | int oldval;
|
---|
[1765] | 3663 |
|
---|
[821] | 3664 | if (fd < 0 && !kernel_has_tainted)
|
---|
| 3665 | return; /* New modutils on old kernel */
|
---|
| 3666 | printf("Warning: loading %s will taint the kernel: %s%s\n",
|
---|
| 3667 | m_name, text1, text2);
|
---|
[1765] | 3668 | if (!printed_info) {
|
---|
[821] | 3669 | printf(" See %s for information about tainted modules\n", TAINT_URL);
|
---|
[1765] | 3670 | printed_info = 1;
|
---|
[821] | 3671 | }
|
---|
| 3672 | if (fd >= 0) {
|
---|
| 3673 | read(fd, buf, sizeof(buf)-1);
|
---|
| 3674 | buf[sizeof(buf)-1] = '\0';
|
---|
| 3675 | oldval = strtoul(buf, NULL, 10);
|
---|
| 3676 | sprintf(buf, "%d\n", oldval | taint);
|
---|
| 3677 | write(fd, buf, strlen(buf));
|
---|
| 3678 | }
|
---|
| 3679 | }
|
---|
| 3680 |
|
---|
| 3681 | /* Check if loading this module will taint the kernel. */
|
---|
| 3682 | static void check_tainted_module(struct obj_file *f, char *m_name)
|
---|
| 3683 | {
|
---|
[1765] | 3684 | static const char tainted_file[] ALIGN1 = TAINT_FILENAME;
|
---|
| 3685 |
|
---|
[821] | 3686 | int fd, kernel_has_tainted;
|
---|
| 3687 | const char *ptr;
|
---|
| 3688 |
|
---|
| 3689 | kernel_has_tainted = 1;
|
---|
[1765] | 3690 | fd = open(tainted_file, O_RDWR);
|
---|
| 3691 | if (fd < 0) {
|
---|
[821] | 3692 | if (errno == ENOENT)
|
---|
| 3693 | kernel_has_tainted = 0;
|
---|
| 3694 | else if (errno == EACCES)
|
---|
| 3695 | kernel_has_tainted = 1;
|
---|
| 3696 | else {
|
---|
| 3697 | perror(tainted_file);
|
---|
| 3698 | kernel_has_tainted = 0;
|
---|
| 3699 | }
|
---|
| 3700 | }
|
---|
| 3701 |
|
---|
| 3702 | switch (obj_gpl_license(f, &ptr)) {
|
---|
| 3703 | case 0:
|
---|
| 3704 | break;
|
---|
| 3705 | case 1:
|
---|
| 3706 | set_tainted(f, fd, m_name, kernel_has_tainted, TAINT_PROPRIETORY_MODULE, "no license", "");
|
---|
| 3707 | break;
|
---|
| 3708 | case 2:
|
---|
| 3709 | /* The module has a non-GPL license so we pretend that the
|
---|
| 3710 | * kernel always has a taint flag to get a warning even on
|
---|
| 3711 | * kernels without the proc flag.
|
---|
| 3712 | */
|
---|
| 3713 | set_tainted(f, fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "non-GPL license - ", ptr);
|
---|
| 3714 | break;
|
---|
| 3715 | default:
|
---|
| 3716 | set_tainted(f, fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "Unexpected return from obj_gpl_license", "");
|
---|
| 3717 | break;
|
---|
| 3718 | }
|
---|
| 3719 |
|
---|
| 3720 | if (flag_force_load)
|
---|
| 3721 | set_tainted(f, fd, m_name, 1, TAINT_FORCED_MODULE, "forced load", "");
|
---|
| 3722 |
|
---|
| 3723 | if (fd >= 0)
|
---|
| 3724 | close(fd);
|
---|
| 3725 | }
|
---|
[1765] | 3726 | #else /* FEATURE_CHECK_TAINTED_MODULE */
|
---|
| 3727 | #define check_tainted_module(x, y) do { } while (0);
|
---|
| 3728 | #endif /* FEATURE_CHECK_TAINTED_MODULE */
|
---|
[821] | 3729 |
|
---|
[1765] | 3730 | #if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
|
---|
[821] | 3731 | /* add module source, timestamp, kernel version and a symbol for the
|
---|
| 3732 | * start of some sections. this info is used by ksymoops to do better
|
---|
| 3733 | * debugging.
|
---|
| 3734 | */
|
---|
| 3735 | static int
|
---|
| 3736 | get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
|
---|
| 3737 | {
|
---|
[1765] | 3738 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
[821] | 3739 | return new_get_module_version(f, str);
|
---|
[1765] | 3740 | #else /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
[821] | 3741 | strncpy(str, "???", sizeof(str));
|
---|
| 3742 | return -1;
|
---|
[1765] | 3743 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
[821] | 3744 | }
|
---|
| 3745 |
|
---|
| 3746 | /* add module source, timestamp, kernel version and a symbol for the
|
---|
| 3747 | * start of some sections. this info is used by ksymoops to do better
|
---|
| 3748 | * debugging.
|
---|
| 3749 | */
|
---|
| 3750 | static void
|
---|
| 3751 | add_ksymoops_symbols(struct obj_file *f, const char *filename,
|
---|
| 3752 | const char *m_name)
|
---|
| 3753 | {
|
---|
[1765] | 3754 | static const char symprefix[] ALIGN1 = "__insmod_";
|
---|
| 3755 |
|
---|
[821] | 3756 | struct obj_section *sec;
|
---|
| 3757 | struct obj_symbol *sym;
|
---|
| 3758 | char *name, *absolute_filename;
|
---|
| 3759 | char str[STRVERSIONLEN], real[PATH_MAX];
|
---|
| 3760 | int i, l, lm_name, lfilename, use_ksymtab, version;
|
---|
| 3761 | struct stat statbuf;
|
---|
| 3762 |
|
---|
| 3763 | static const char *section_names[] = {
|
---|
| 3764 | ".text",
|
---|
| 3765 | ".rodata",
|
---|
| 3766 | ".data",
|
---|
| 3767 | ".bss",
|
---|
| 3768 | ".sbss"
|
---|
| 3769 | };
|
---|
| 3770 |
|
---|
| 3771 | if (realpath(filename, real)) {
|
---|
[1765] | 3772 | absolute_filename = xstrdup(real);
|
---|
| 3773 | } else {
|
---|
| 3774 | bb_perror_msg("cannot get realpath for %s", filename);
|
---|
| 3775 | absolute_filename = xstrdup(filename);
|
---|
[821] | 3776 | }
|
---|
| 3777 |
|
---|
| 3778 | lm_name = strlen(m_name);
|
---|
| 3779 | lfilename = strlen(absolute_filename);
|
---|
| 3780 |
|
---|
| 3781 | /* add to ksymtab if it already exists or there is no ksymtab and other symbols
|
---|
| 3782 | * are not to be exported. otherwise leave ksymtab alone for now, the
|
---|
| 3783 | * "export all symbols" compatibility code will export these symbols later.
|
---|
| 3784 | */
|
---|
[1765] | 3785 | use_ksymtab = obj_find_section(f, "__ksymtab") || flag_noexport;
|
---|
[821] | 3786 |
|
---|
[1765] | 3787 | sec = obj_find_section(f, ".this");
|
---|
| 3788 | if (sec) {
|
---|
[821] | 3789 | /* tag the module header with the object name, last modified
|
---|
| 3790 | * timestamp and module version. worst case for module version
|
---|
| 3791 | * is 0xffffff, decimal 16777215. putting all three fields in
|
---|
| 3792 | * one symbol is less readable but saves kernel space.
|
---|
| 3793 | */
|
---|
| 3794 | l = sizeof(symprefix)+ /* "__insmod_" */
|
---|
| 3795 | lm_name+ /* module name */
|
---|
| 3796 | 2+ /* "_O" */
|
---|
| 3797 | lfilename+ /* object filename */
|
---|
| 3798 | 2+ /* "_M" */
|
---|
| 3799 | 2*sizeof(statbuf.st_mtime)+ /* mtime in hex */
|
---|
| 3800 | 2+ /* "_V" */
|
---|
| 3801 | 8+ /* version in dec */
|
---|
| 3802 | 1; /* nul */
|
---|
| 3803 | name = xmalloc(l);
|
---|
| 3804 | if (stat(absolute_filename, &statbuf) != 0)
|
---|
| 3805 | statbuf.st_mtime = 0;
|
---|
| 3806 | version = get_module_version(f, str); /* -1 if not found */
|
---|
| 3807 | snprintf(name, l, "%s%s_O%s_M%0*lX_V%d",
|
---|
| 3808 | symprefix, m_name, absolute_filename,
|
---|
| 3809 | (int)(2*sizeof(statbuf.st_mtime)), statbuf.st_mtime,
|
---|
| 3810 | version);
|
---|
| 3811 | sym = obj_add_symbol(f, name, -1,
|
---|
| 3812 | ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
|
---|
| 3813 | sec->idx, sec->header.sh_addr, 0);
|
---|
| 3814 | if (use_ksymtab)
|
---|
| 3815 | new_add_ksymtab(f, sym);
|
---|
| 3816 | }
|
---|
| 3817 | free(absolute_filename);
|
---|
| 3818 | #ifdef _NOT_SUPPORTED_
|
---|
| 3819 | /* record where the persistent data is going, same address as previous symbol */
|
---|
| 3820 |
|
---|
| 3821 | if (f->persist) {
|
---|
| 3822 | l = sizeof(symprefix)+ /* "__insmod_" */
|
---|
| 3823 | lm_name+ /* module name */
|
---|
| 3824 | 2+ /* "_P" */
|
---|
| 3825 | strlen(f->persist)+ /* data store */
|
---|
| 3826 | 1; /* nul */
|
---|
| 3827 | name = xmalloc(l);
|
---|
| 3828 | snprintf(name, l, "%s%s_P%s",
|
---|
| 3829 | symprefix, m_name, f->persist);
|
---|
| 3830 | sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
|
---|
| 3831 | sec->idx, sec->header.sh_addr, 0);
|
---|
| 3832 | if (use_ksymtab)
|
---|
| 3833 | new_add_ksymtab(f, sym);
|
---|
| 3834 | }
|
---|
| 3835 | #endif /* _NOT_SUPPORTED_ */
|
---|
| 3836 | /* tag the desired sections if size is non-zero */
|
---|
| 3837 |
|
---|
[1765] | 3838 | for (i = 0; i < ARRAY_SIZE(section_names); ++i) {
|
---|
| 3839 | sec = obj_find_section(f, section_names[i]);
|
---|
| 3840 | if (sec && sec->header.sh_size) {
|
---|
[821] | 3841 | l = sizeof(symprefix)+ /* "__insmod_" */
|
---|
| 3842 | lm_name+ /* module name */
|
---|
| 3843 | 2+ /* "_S" */
|
---|
| 3844 | strlen(sec->name)+ /* section name */
|
---|
| 3845 | 2+ /* "_L" */
|
---|
| 3846 | 8+ /* length in dec */
|
---|
| 3847 | 1; /* nul */
|
---|
| 3848 | name = xmalloc(l);
|
---|
| 3849 | snprintf(name, l, "%s%s_S%s_L%ld",
|
---|
| 3850 | symprefix, m_name, sec->name,
|
---|
| 3851 | (long)sec->header.sh_size);
|
---|
| 3852 | sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
|
---|
| 3853 | sec->idx, sec->header.sh_addr, 0);
|
---|
| 3854 | if (use_ksymtab)
|
---|
| 3855 | new_add_ksymtab(f, sym);
|
---|
| 3856 | }
|
---|
| 3857 | }
|
---|
| 3858 | }
|
---|
[1765] | 3859 | #endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
|
---|
[821] | 3860 |
|
---|
[1765] | 3861 | #if ENABLE_FEATURE_INSMOD_LOAD_MAP
|
---|
[821] | 3862 | static void print_load_map(struct obj_file *f)
|
---|
| 3863 | {
|
---|
[1765] | 3864 | struct obj_section *sec;
|
---|
| 3865 | #if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
|
---|
[821] | 3866 | struct obj_symbol **all, **p;
|
---|
| 3867 | int i, nsyms, *loaded;
|
---|
[1765] | 3868 | struct obj_symbol *sym;
|
---|
| 3869 | #endif
|
---|
[821] | 3870 | /* Report on the section layout. */
|
---|
| 3871 |
|
---|
| 3872 | printf("Sections: Size %-*s Align\n",
|
---|
| 3873 | (int) (2 * sizeof(void *)), "Address");
|
---|
| 3874 |
|
---|
| 3875 | for (sec = f->load_order; sec; sec = sec->load_next) {
|
---|
| 3876 | int a;
|
---|
| 3877 | unsigned long tmp;
|
---|
| 3878 |
|
---|
| 3879 | for (a = -1, tmp = sec->header.sh_addralign; tmp; ++a)
|
---|
| 3880 | tmp >>= 1;
|
---|
| 3881 | if (a == -1)
|
---|
| 3882 | a = 0;
|
---|
| 3883 |
|
---|
| 3884 | printf("%-15s %08lx %0*lx 2**%d\n",
|
---|
| 3885 | sec->name,
|
---|
| 3886 | (long)sec->header.sh_size,
|
---|
| 3887 | (int) (2 * sizeof(void *)),
|
---|
| 3888 | (long)sec->header.sh_addr,
|
---|
| 3889 | a);
|
---|
| 3890 | }
|
---|
[1765] | 3891 | #if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
|
---|
[821] | 3892 | /* Quick reference which section indicies are loaded. */
|
---|
| 3893 |
|
---|
| 3894 | loaded = alloca(sizeof(int) * (i = f->header.e_shnum));
|
---|
| 3895 | while (--i >= 0)
|
---|
| 3896 | loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0;
|
---|
| 3897 |
|
---|
| 3898 | /* Collect the symbols we'll be listing. */
|
---|
| 3899 |
|
---|
| 3900 | for (nsyms = i = 0; i < HASH_BUCKETS; ++i)
|
---|
| 3901 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 3902 | if (sym->secidx <= SHN_HIRESERVE
|
---|
| 3903 | && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
|
---|
| 3904 | ++nsyms;
|
---|
| 3905 |
|
---|
| 3906 | all = alloca(nsyms * sizeof(struct obj_symbol *));
|
---|
| 3907 |
|
---|
| 3908 | for (i = 0, p = all; i < HASH_BUCKETS; ++i)
|
---|
| 3909 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 3910 | if (sym->secidx <= SHN_HIRESERVE
|
---|
| 3911 | && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
|
---|
| 3912 | *p++ = sym;
|
---|
| 3913 |
|
---|
| 3914 | /* And list them. */
|
---|
| 3915 | printf("\nSymbols:\n");
|
---|
| 3916 | for (p = all; p < all + nsyms; ++p) {
|
---|
| 3917 | char type = '?';
|
---|
| 3918 | unsigned long value;
|
---|
| 3919 |
|
---|
| 3920 | sym = *p;
|
---|
| 3921 | if (sym->secidx == SHN_ABS) {
|
---|
| 3922 | type = 'A';
|
---|
| 3923 | value = sym->value;
|
---|
| 3924 | } else if (sym->secidx == SHN_UNDEF) {
|
---|
| 3925 | type = 'U';
|
---|
| 3926 | value = 0;
|
---|
| 3927 | } else {
|
---|
| 3928 | sec = f->sections[sym->secidx];
|
---|
| 3929 |
|
---|
| 3930 | if (sec->header.sh_type == SHT_NOBITS)
|
---|
| 3931 | type = 'B';
|
---|
| 3932 | else if (sec->header.sh_flags & SHF_ALLOC) {
|
---|
| 3933 | if (sec->header.sh_flags & SHF_EXECINSTR)
|
---|
| 3934 | type = 'T';
|
---|
| 3935 | else if (sec->header.sh_flags & SHF_WRITE)
|
---|
| 3936 | type = 'D';
|
---|
| 3937 | else
|
---|
| 3938 | type = 'R';
|
---|
| 3939 | }
|
---|
| 3940 | value = sym->value + sec->header.sh_addr;
|
---|
| 3941 | }
|
---|
| 3942 |
|
---|
| 3943 | if (ELF_ST_BIND(sym->info) == STB_LOCAL)
|
---|
| 3944 | type = tolower(type);
|
---|
| 3945 |
|
---|
| 3946 | printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value,
|
---|
| 3947 | type, sym->name);
|
---|
| 3948 | }
|
---|
| 3949 | #endif
|
---|
| 3950 | }
|
---|
[1765] | 3951 | #else /* !FEATURE_INSMOD_LOAD_MAP */
|
---|
| 3952 | void print_load_map(struct obj_file *f);
|
---|
[821] | 3953 | #endif
|
---|
| 3954 |
|
---|
[1765] | 3955 | int insmod_main( int argc, char **argv);
|
---|
[821] | 3956 | int insmod_main( int argc, char **argv)
|
---|
| 3957 | {
|
---|
[1765] | 3958 | char *opt_o, *arg1;
|
---|
[821] | 3959 | int len;
|
---|
| 3960 | int k_crcs;
|
---|
| 3961 | char *tmp, *tmp1;
|
---|
| 3962 | unsigned long m_size;
|
---|
| 3963 | ElfW(Addr) m_addr;
|
---|
| 3964 | struct obj_file *f;
|
---|
| 3965 | struct stat st;
|
---|
| 3966 | char *m_name = 0;
|
---|
| 3967 | int exit_status = EXIT_FAILURE;
|
---|
| 3968 | int m_has_modinfo;
|
---|
[1765] | 3969 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
[821] | 3970 | struct utsname uts_info;
|
---|
| 3971 | char m_strversion[STRVERSIONLEN];
|
---|
| 3972 | int m_version, m_crcs;
|
---|
| 3973 | #endif
|
---|
[1765] | 3974 | #if ENABLE_FEATURE_CLEAN_UP
|
---|
[821] | 3975 | FILE *fp = 0;
|
---|
| 3976 | #else
|
---|
| 3977 | FILE *fp;
|
---|
| 3978 | #endif
|
---|
| 3979 | int k_version = 0;
|
---|
| 3980 | struct utsname myuname;
|
---|
| 3981 |
|
---|
| 3982 | /* Parse any options */
|
---|
[1765] | 3983 | getopt32(argv, OPTION_STR, &opt_o);
|
---|
| 3984 | arg1 = argv[optind];
|
---|
| 3985 | if (option_mask32 & OPT_o) { // -o /* name the output module */
|
---|
| 3986 | free(m_name);
|
---|
| 3987 | m_name = xstrdup(opt_o);
|
---|
| 3988 | }
|
---|
[821] | 3989 |
|
---|
[1765] | 3990 | if (arg1 == NULL) {
|
---|
[821] | 3991 | bb_show_usage();
|
---|
| 3992 | }
|
---|
| 3993 |
|
---|
| 3994 | /* Grab the module name */
|
---|
[1765] | 3995 | tmp1 = xstrdup(arg1);
|
---|
[821] | 3996 | tmp = basename(tmp1);
|
---|
| 3997 | len = strlen(tmp);
|
---|
| 3998 |
|
---|
| 3999 | if (uname(&myuname) == 0) {
|
---|
| 4000 | if (myuname.release[0] == '2') {
|
---|
| 4001 | k_version = myuname.release[2] - '0';
|
---|
| 4002 | }
|
---|
| 4003 | }
|
---|
| 4004 |
|
---|
[1765] | 4005 | #if ENABLE_FEATURE_2_6_MODULES
|
---|
| 4006 | if (k_version > 4 && len > 3 && tmp[len - 3] == '.'
|
---|
| 4007 | && tmp[len - 2] == 'k' && tmp[len - 1] == 'o'
|
---|
| 4008 | ) {
|
---|
| 4009 | len -= 3;
|
---|
[821] | 4010 | tmp[len] = '\0';
|
---|
[1765] | 4011 | } else
|
---|
[821] | 4012 | #endif
|
---|
| 4013 | if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') {
|
---|
[1765] | 4014 | len -= 2;
|
---|
[821] | 4015 | tmp[len] = '\0';
|
---|
| 4016 | }
|
---|
| 4017 |
|
---|
| 4018 |
|
---|
[1765] | 4019 | #if ENABLE_FEATURE_2_6_MODULES
|
---|
[821] | 4020 | if (k_version > 4)
|
---|
[1765] | 4021 | m_fullName = xasprintf("%s.ko", tmp);
|
---|
[821] | 4022 | else
|
---|
| 4023 | #endif
|
---|
[1765] | 4024 | m_fullName = xasprintf("%s.o", tmp);
|
---|
[821] | 4025 |
|
---|
| 4026 | if (!m_name) {
|
---|
| 4027 | m_name = tmp;
|
---|
| 4028 | } else {
|
---|
| 4029 | free(tmp1);
|
---|
| 4030 | tmp1 = 0; /* flag for free(m_name) before exit() */
|
---|
| 4031 | }
|
---|
| 4032 |
|
---|
| 4033 | /* Get a filedesc for the module. Check we we have a complete path */
|
---|
[1765] | 4034 | if (stat(arg1, &st) < 0 || !S_ISREG(st.st_mode)
|
---|
| 4035 | || (fp = fopen(arg1, "r")) == NULL
|
---|
| 4036 | ) {
|
---|
[821] | 4037 | /* Hmm. Could not open it. First search under /lib/modules/`uname -r`,
|
---|
| 4038 | * but do not error out yet if we fail to find it... */
|
---|
| 4039 | if (k_version) { /* uname succeedd */
|
---|
| 4040 | char *module_dir;
|
---|
| 4041 | char *tmdn;
|
---|
| 4042 | char real_module_dir[FILENAME_MAX];
|
---|
| 4043 |
|
---|
| 4044 | tmdn = concat_path_file(_PATH_MODULES, myuname.release);
|
---|
| 4045 | /* Jump through hoops in case /lib/modules/`uname -r`
|
---|
| 4046 | * is a symlink. We do not want recursive_action to
|
---|
| 4047 | * follow symlinks, but we do want to follow the
|
---|
| 4048 | * /lib/modules/`uname -r` dir, So resolve it ourselves
|
---|
| 4049 | * if it is a link... */
|
---|
[1765] | 4050 | if (realpath(tmdn, real_module_dir) == NULL)
|
---|
[821] | 4051 | module_dir = tmdn;
|
---|
| 4052 | else
|
---|
| 4053 | module_dir = real_module_dir;
|
---|
[1765] | 4054 | recursive_action(module_dir, ACTION_RECURSE,
|
---|
| 4055 | check_module_name_match, 0, m_fullName, 0);
|
---|
[821] | 4056 | free(tmdn);
|
---|
| 4057 | }
|
---|
| 4058 |
|
---|
| 4059 | /* Check if we have found anything yet */
|
---|
[1765] | 4060 | if (m_filename == 0 || ((fp = fopen(m_filename, "r")) == NULL)) {
|
---|
[821] | 4061 | char module_dir[FILENAME_MAX];
|
---|
| 4062 |
|
---|
| 4063 | free(m_filename);
|
---|
| 4064 | m_filename = 0;
|
---|
| 4065 | if (realpath (_PATH_MODULES, module_dir) == NULL)
|
---|
| 4066 | strcpy(module_dir, _PATH_MODULES);
|
---|
| 4067 | /* No module found under /lib/modules/`uname -r`, this
|
---|
| 4068 | * time cast the net a bit wider. Search /lib/modules/ */
|
---|
[1765] | 4069 | if (!recursive_action(module_dir, ACTION_RECURSE,
|
---|
| 4070 | check_module_name_match, 0, m_fullName, 0)
|
---|
| 4071 | ) {
|
---|
[821] | 4072 | if (m_filename == 0
|
---|
[1765] | 4073 | || ((fp = fopen(m_filename, "r")) == NULL)
|
---|
| 4074 | ) {
|
---|
[821] | 4075 | bb_error_msg("%s: no module by that name found", m_fullName);
|
---|
| 4076 | goto out;
|
---|
| 4077 | }
|
---|
| 4078 | } else
|
---|
| 4079 | bb_error_msg_and_die("%s: no module by that name found", m_fullName);
|
---|
| 4080 | }
|
---|
| 4081 | } else
|
---|
[1765] | 4082 | m_filename = xstrdup(arg1);
|
---|
[821] | 4083 |
|
---|
| 4084 | if (flag_verbose)
|
---|
| 4085 | printf("Using %s\n", m_filename);
|
---|
| 4086 |
|
---|
[1765] | 4087 | #if ENABLE_FEATURE_2_6_MODULES
|
---|
| 4088 | if (k_version > 4) {
|
---|
| 4089 | argv[optind] = m_filename;
|
---|
[821] | 4090 | optind--;
|
---|
| 4091 | return insmod_ng_main(argc - optind, argv + optind);
|
---|
| 4092 | }
|
---|
| 4093 | #endif
|
---|
| 4094 |
|
---|
[1765] | 4095 | f = obj_load(fp, LOADBITS);
|
---|
| 4096 | if (f == NULL)
|
---|
| 4097 | bb_perror_msg_and_die("cannot load the module");
|
---|
[821] | 4098 |
|
---|
| 4099 | if (get_modinfo_value(f, "kernel_version") == NULL)
|
---|
| 4100 | m_has_modinfo = 0;
|
---|
| 4101 | else
|
---|
| 4102 | m_has_modinfo = 1;
|
---|
| 4103 |
|
---|
[1765] | 4104 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
[821] | 4105 | /* Version correspondence? */
|
---|
| 4106 | if (!flag_quiet) {
|
---|
| 4107 | if (uname(&uts_info) < 0)
|
---|
| 4108 | uts_info.release[0] = '\0';
|
---|
| 4109 | if (m_has_modinfo) {
|
---|
| 4110 | m_version = new_get_module_version(f, m_strversion);
|
---|
| 4111 | if (m_version == -1) {
|
---|
[1765] | 4112 | bb_error_msg("cannot find the kernel version the module was "
|
---|
[821] | 4113 | "compiled for");
|
---|
| 4114 | goto out;
|
---|
| 4115 | }
|
---|
| 4116 | }
|
---|
| 4117 |
|
---|
| 4118 | if (strncmp(uts_info.release, m_strversion, STRVERSIONLEN) != 0) {
|
---|
[1765] | 4119 | bb_error_msg("%skernel-module version mismatch\n"
|
---|
| 4120 | "\t%s was compiled for kernel version %s\n"
|
---|
| 4121 | "\twhile this kernel is version %s",
|
---|
| 4122 | flag_force_load ? "warning: " : "",
|
---|
| 4123 | m_filename, m_strversion, uts_info.release);
|
---|
| 4124 | if (!flag_force_load)
|
---|
[821] | 4125 | goto out;
|
---|
| 4126 | }
|
---|
| 4127 | }
|
---|
| 4128 | k_crcs = 0;
|
---|
[1765] | 4129 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
[821] | 4130 |
|
---|
| 4131 | if (!query_module(NULL, 0, NULL, 0, NULL)) {
|
---|
| 4132 | if (!new_get_kernel_symbols())
|
---|
| 4133 | goto out;
|
---|
| 4134 | k_crcs = new_is_kernel_checksummed();
|
---|
| 4135 | } else {
|
---|
[1765] | 4136 | bb_error_msg("not configured to support old kernels");
|
---|
[821] | 4137 | goto out;
|
---|
| 4138 | }
|
---|
| 4139 |
|
---|
[1765] | 4140 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
[821] | 4141 | m_crcs = 0;
|
---|
| 4142 | if (m_has_modinfo)
|
---|
| 4143 | m_crcs = new_is_module_checksummed(f);
|
---|
| 4144 |
|
---|
| 4145 | if (m_crcs != k_crcs)
|
---|
| 4146 | obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash);
|
---|
[1765] | 4147 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
[821] | 4148 |
|
---|
| 4149 | /* Let the module know about the kernel symbols. */
|
---|
| 4150 | add_kernel_symbols(f);
|
---|
| 4151 |
|
---|
| 4152 | /* Allocate common symbols, symbol tables, and string tables. */
|
---|
| 4153 |
|
---|
[1765] | 4154 | if (!new_create_this_module(f, m_name)) {
|
---|
[821] | 4155 | goto out;
|
---|
| 4156 | }
|
---|
| 4157 |
|
---|
| 4158 | if (!obj_check_undefineds(f)) {
|
---|
| 4159 | goto out;
|
---|
| 4160 | }
|
---|
| 4161 | obj_allocate_commons(f);
|
---|
| 4162 | check_tainted_module(f, m_name);
|
---|
| 4163 |
|
---|
| 4164 | /* done with the module name, on to the optional var=value arguments */
|
---|
| 4165 | ++optind;
|
---|
| 4166 | if (optind < argc) {
|
---|
[1765] | 4167 | if (!new_process_module_arguments(f, argc - optind, argv + optind)) {
|
---|
[821] | 4168 | goto out;
|
---|
| 4169 | }
|
---|
| 4170 | }
|
---|
| 4171 |
|
---|
| 4172 | arch_create_got(f);
|
---|
| 4173 | hide_special_symbols(f);
|
---|
| 4174 |
|
---|
[1765] | 4175 | #if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
|
---|
[821] | 4176 | add_ksymoops_symbols(f, m_filename, m_name);
|
---|
[1765] | 4177 | #endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
|
---|
[821] | 4178 |
|
---|
| 4179 | new_create_module_ksymtab(f);
|
---|
| 4180 |
|
---|
| 4181 | /* Find current size of the module */
|
---|
| 4182 | m_size = obj_load_size(f);
|
---|
| 4183 |
|
---|
| 4184 |
|
---|
| 4185 | m_addr = create_module(m_name, m_size);
|
---|
| 4186 | if (m_addr == -1) switch (errno) {
|
---|
| 4187 | case EEXIST:
|
---|
[1765] | 4188 | bb_error_msg("a module named %s already exists", m_name);
|
---|
[821] | 4189 | goto out;
|
---|
| 4190 | case ENOMEM:
|
---|
[1765] | 4191 | bb_error_msg("can't allocate kernel memory for module; needed %lu bytes",
|
---|
[821] | 4192 | m_size);
|
---|
| 4193 | goto out;
|
---|
| 4194 | default:
|
---|
| 4195 | bb_perror_msg("create_module: %s", m_name);
|
---|
| 4196 | goto out;
|
---|
| 4197 | }
|
---|
| 4198 |
|
---|
| 4199 | #if !LOADBITS
|
---|
| 4200 | /*
|
---|
| 4201 | * the PROGBITS section was not loaded by the obj_load
|
---|
| 4202 | * now we can load them directly into the kernel memory
|
---|
| 4203 | */
|
---|
| 4204 | if (!obj_load_progbits(fp, f, (char*)m_addr)) {
|
---|
| 4205 | delete_module(m_name);
|
---|
| 4206 | goto out;
|
---|
| 4207 | }
|
---|
| 4208 | #endif
|
---|
| 4209 |
|
---|
| 4210 | if (!obj_relocate(f, m_addr)) {
|
---|
| 4211 | delete_module(m_name);
|
---|
| 4212 | goto out;
|
---|
| 4213 | }
|
---|
| 4214 |
|
---|
[1765] | 4215 | if (!new_init_module(m_name, f, m_size)) {
|
---|
[821] | 4216 | delete_module(m_name);
|
---|
| 4217 | goto out;
|
---|
| 4218 | }
|
---|
| 4219 |
|
---|
[1765] | 4220 | if (flag_print_load_map)
|
---|
[821] | 4221 | print_load_map(f);
|
---|
| 4222 |
|
---|
| 4223 | exit_status = EXIT_SUCCESS;
|
---|
| 4224 |
|
---|
| 4225 | out:
|
---|
[1765] | 4226 | #if ENABLE_FEATURE_CLEAN_UP
|
---|
| 4227 | if (fp)
|
---|
[821] | 4228 | fclose(fp);
|
---|
| 4229 | free(tmp1);
|
---|
[1765] | 4230 | if (!tmp1)
|
---|
[821] | 4231 | free(m_name);
|
---|
| 4232 | free(m_filename);
|
---|
| 4233 | #endif
|
---|
[1765] | 4234 | return exit_status;
|
---|
[821] | 4235 | }
|
---|
| 4236 |
|
---|
| 4237 |
|
---|
| 4238 | #endif
|
---|
| 4239 |
|
---|
| 4240 |
|
---|
[1765] | 4241 | #if ENABLE_FEATURE_2_6_MODULES
|
---|
[821] | 4242 |
|
---|
| 4243 | #include <sys/mman.h>
|
---|
| 4244 | #include <asm/unistd.h>
|
---|
| 4245 | #include <sys/syscall.h>
|
---|
| 4246 |
|
---|
| 4247 | /* We use error numbers in a loose translation... */
|
---|
| 4248 | static const char *moderror(int err)
|
---|
| 4249 | {
|
---|
| 4250 | switch (err) {
|
---|
[1765] | 4251 | case ENOEXEC:
|
---|
| 4252 | return "Invalid module format";
|
---|
| 4253 | case ENOENT:
|
---|
| 4254 | return "Unknown symbol in module";
|
---|
| 4255 | case ESRCH:
|
---|
| 4256 | return "Module has wrong symbol version";
|
---|
| 4257 | case EINVAL:
|
---|
| 4258 | return "Invalid parameters";
|
---|
| 4259 | default:
|
---|
| 4260 | return strerror(err);
|
---|
[821] | 4261 | }
|
---|
| 4262 | }
|
---|
| 4263 |
|
---|
[1765] | 4264 | int insmod_ng_main(int argc, char **argv);
|
---|
| 4265 | int insmod_ng_main(int argc, char **argv)
|
---|
[821] | 4266 | {
|
---|
[1765] | 4267 | long ret;
|
---|
| 4268 | size_t len;
|
---|
| 4269 | int optlen;
|
---|
[821] | 4270 | void *map;
|
---|
[1765] | 4271 | char *filename, *options;
|
---|
[821] | 4272 |
|
---|
[1765] | 4273 | filename = *++argv;
|
---|
| 4274 | if (!filename)
|
---|
[821] | 4275 | bb_show_usage();
|
---|
| 4276 |
|
---|
| 4277 | /* Rest is options */
|
---|
[1765] | 4278 | options = xzalloc(1);
|
---|
| 4279 | optlen = 0;
|
---|
| 4280 | while (*++argv) {
|
---|
| 4281 | options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
|
---|
[821] | 4282 | /* Spaces handled by "" pairs, but no way of escaping quotes */
|
---|
[1765] | 4283 | optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
|
---|
[821] | 4284 | }
|
---|
| 4285 |
|
---|
[1765] | 4286 | #if 0
|
---|
| 4287 | /* Any special reason why mmap? It isn't performace critical... */
|
---|
| 4288 | int fd;
|
---|
| 4289 | struct stat st;
|
---|
| 4290 | unsigned long len;
|
---|
| 4291 | fd = xopen(filename, O_RDONLY);
|
---|
[821] | 4292 | fstat(fd, &st);
|
---|
| 4293 | len = st.st_size;
|
---|
| 4294 | map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
|
---|
| 4295 | if (map == MAP_FAILED) {
|
---|
[1765] | 4296 | bb_perror_msg_and_die("cannot mmap '%s'", filename);
|
---|
[821] | 4297 | }
|
---|
| 4298 |
|
---|
[1765] | 4299 | /* map == NULL on Blackfin, probably on other MMU-less systems too. Workaround. */
|
---|
| 4300 | if (map == NULL) {
|
---|
| 4301 | map = xmalloc(len);
|
---|
| 4302 | xread(fd, map, len);
|
---|
| 4303 | }
|
---|
| 4304 | #else
|
---|
| 4305 | len = MAXINT(ssize_t);
|
---|
| 4306 | map = xmalloc_open_read_close(filename, &len);
|
---|
| 4307 | #endif
|
---|
| 4308 |
|
---|
[821] | 4309 | ret = syscall(__NR_init_module, map, len, options);
|
---|
| 4310 | if (ret != 0) {
|
---|
[1765] | 4311 | bb_perror_msg_and_die("cannot insert '%s': %s (%li)",
|
---|
[821] | 4312 | filename, moderror(errno), ret);
|
---|
| 4313 | }
|
---|
| 4314 |
|
---|
| 4315 | return 0;
|
---|
| 4316 | }
|
---|
| 4317 |
|
---|
| 4318 | #endif
|
---|