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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43 | * Did some cleanup and added USE_xxx_ENTRIES...
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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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61 | #include "libbb.h"
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62 | #include <libgen.h>
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63 | #include <sys/utsname.h>
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64 |
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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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68 | #endif
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69 |
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70 | #if !ENABLE_FEATURE_2_4_MODULES
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71 | #define insmod_ng_main insmod_main
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72 | #endif
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73 |
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74 | #if ENABLE_FEATURE_2_6_MODULES
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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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79 | #if ENABLE_FEATURE_2_4_MODULES
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80 |
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81 |
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82 | #if ENABLE_FEATURE_INSMOD_LOADINKMEM
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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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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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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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137 | #define USE_SINGLE
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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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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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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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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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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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190 | #define USE_SINGLE
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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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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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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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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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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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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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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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283 | #if defined(__v850e__)
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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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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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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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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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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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370 | struct new_module_symbol {
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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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377 | struct new_module_ref {
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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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383 | struct new_module {
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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;
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399 | unsigned tgt_long cleanup;
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400 | unsigned tgt_long ex_table_start;
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401 | unsigned tgt_long ex_table_end;
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402 | #ifdef __alpha__
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403 | unsigned tgt_long gp;
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404 | #endif
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405 | /* Everything after here is extension. */
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406 | unsigned tgt_long persist_start;
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407 | unsigned tgt_long persist_end;
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408 | unsigned tgt_long can_unload;
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409 | unsigned tgt_long runsize;
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410 | const char *kallsyms_start; /* All symbols for kernel debugging */
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411 | const char *kallsyms_end;
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412 | const char *archdata_start; /* arch specific data for module */
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413 | const char *archdata_end;
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414 | const char *kernel_data; /* Reserved for kernel internal use */
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415 | };
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416 |
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417 | #ifdef ARCHDATAM
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418 | #define ARCHDATA_SEC_NAME ARCHDATAM
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419 | #else
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420 | #define ARCHDATA_SEC_NAME "__archdata"
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421 | #endif
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422 | #define KALLSYMS_SEC_NAME "__kallsyms"
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423 |
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424 |
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425 | struct new_module_info {
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426 | unsigned long addr;
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427 | unsigned long size;
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428 | unsigned long flags;
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429 | long usecount;
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430 | };
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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 |
|
---|
557 | struct obj_file {
|
---|
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 |
|
---|
572 | enum obj_reloc {
|
---|
573 | obj_reloc_ok,
|
---|
574 | obj_reloc_overflow,
|
---|
575 | obj_reloc_dangerous,
|
---|
576 | obj_reloc_unhandled
|
---|
577 | };
|
---|
578 |
|
---|
579 | struct obj_string_patch {
|
---|
580 | struct obj_string_patch *next;
|
---|
581 | int reloc_secidx;
|
---|
582 | ElfW(Addr) reloc_offset;
|
---|
583 | ElfW(Addr) string_offset;
|
---|
584 | };
|
---|
585 |
|
---|
586 | struct obj_symbol_patch {
|
---|
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 |
|
---|
600 | static struct obj_symbol *obj_find_symbol(struct obj_file *f,
|
---|
601 | const char *name);
|
---|
602 |
|
---|
603 | static ElfW(Addr) obj_symbol_final_value(struct obj_file *f,
|
---|
604 | struct obj_symbol *sym);
|
---|
605 |
|
---|
606 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
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 |
|
---|
612 | static struct obj_section *obj_find_section(struct obj_file *f,
|
---|
613 | const char *name);
|
---|
614 |
|
---|
615 | static void obj_insert_section_load_order(struct obj_file *f,
|
---|
616 | struct obj_section *sec);
|
---|
617 |
|
---|
618 | static struct obj_section *obj_create_alloced_section(struct obj_file *f,
|
---|
619 | const char *name,
|
---|
620 | unsigned long align,
|
---|
621 | unsigned long size);
|
---|
622 |
|
---|
623 | static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
|
---|
624 | const char *name,
|
---|
625 | unsigned long align,
|
---|
626 | unsigned long size);
|
---|
627 |
|
---|
628 | static void *obj_extend_section(struct obj_section *sec, unsigned long more);
|
---|
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 |
|
---|
640 | static unsigned long obj_load_size(struct obj_file *f);
|
---|
641 |
|
---|
642 | static int obj_relocate(struct obj_file *f, ElfW(Addr) base);
|
---|
643 |
|
---|
644 | static struct obj_file *obj_load(FILE *f, int loadprogbits);
|
---|
645 |
|
---|
646 | static int obj_create_image(struct obj_file *f, char *image);
|
---|
647 |
|
---|
648 | /* Architecture specific manipulation routines. */
|
---|
649 |
|
---|
650 | static struct obj_file *arch_new_file(void);
|
---|
651 |
|
---|
652 | static struct obj_section *arch_new_section(void);
|
---|
653 |
|
---|
654 | static struct obj_symbol *arch_new_symbol(void);
|
---|
655 |
|
---|
656 | static enum obj_reloc arch_apply_relocation(struct obj_file *f,
|
---|
657 | struct obj_section *targsec,
|
---|
658 | struct obj_section *symsec,
|
---|
659 | struct obj_symbol *sym,
|
---|
660 | ElfW(RelM) *rel, ElfW(Addr) value);
|
---|
661 |
|
---|
662 | static void arch_create_got(struct obj_file *f);
|
---|
663 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
|
---|
664 | static int obj_gpl_license(struct obj_file *f, const char **license);
|
---|
665 | #endif /* FEATURE_CHECK_TAINTED_MODULE */
|
---|
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"
|
---|
681 | enum { STRVERSIONLEN = 64 };
|
---|
682 |
|
---|
683 | /*======================================================================*/
|
---|
684 |
|
---|
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
|
---|
714 |
|
---|
715 | /*======================================================================*/
|
---|
716 |
|
---|
717 | #if defined(USE_LIST)
|
---|
718 |
|
---|
719 | struct arch_list_entry
|
---|
720 | {
|
---|
721 | struct arch_list_entry *next;
|
---|
722 | LIST_ARCHTYPE addend;
|
---|
723 | int offset;
|
---|
724 | int inited : 1;
|
---|
725 | };
|
---|
726 |
|
---|
727 | #endif
|
---|
728 |
|
---|
729 | #if defined(USE_SINGLE)
|
---|
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;
|
---|
751 | #if defined(USE_PLT_ENTRIES)
|
---|
752 | struct obj_section *plt;
|
---|
753 | #endif
|
---|
754 | #if defined(USE_GOT_ENTRIES)
|
---|
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;
|
---|
764 | #if defined(USE_PLT_ENTRIES)
|
---|
765 | #if defined(USE_PLT_LIST)
|
---|
766 | struct arch_list_entry *pltent;
|
---|
767 | #else
|
---|
768 | struct arch_single_entry pltent;
|
---|
769 | #endif
|
---|
770 | #endif
|
---|
771 | #if defined(USE_GOT_ENTRIES)
|
---|
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,
|
---|
801 | void *userdata, int depth)
|
---|
802 | {
|
---|
803 | char *fullname = (char *) userdata;
|
---|
804 |
|
---|
805 | if (fullname[0] == '\0')
|
---|
806 | return FALSE;
|
---|
807 | else {
|
---|
808 | char *tmp, *tmp1 = xstrdup(filename);
|
---|
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 */
|
---|
813 | m_filename = xstrdup(filename);
|
---|
814 | return FALSE;
|
---|
815 | }
|
---|
816 | free(tmp1);
|
---|
817 | }
|
---|
818 | return TRUE;
|
---|
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,
|
---|
851 | struct obj_section *targsec,
|
---|
852 | struct obj_section *symsec,
|
---|
853 | struct obj_symbol *sym,
|
---|
854 | ElfW(RelM) *rel, ElfW(Addr) v)
|
---|
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;
|
---|
860 | #if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
|
---|
861 | struct arch_symbol *isym = (struct arch_symbol *) sym;
|
---|
862 | #endif
|
---|
863 | #if defined(__arm__) || defined(__i386__) || defined(__mc68000__) || defined(__sh__) || defined(__s390__)
|
---|
864 | #if defined(USE_GOT_ENTRIES)
|
---|
865 | ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0;
|
---|
866 | #endif
|
---|
867 | #endif
|
---|
868 | #if defined(USE_PLT_ENTRIES)
|
---|
869 | ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
|
---|
870 | unsigned long *ip;
|
---|
871 | # if defined(USE_PLT_LIST)
|
---|
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 |
|
---|
984 | #elif defined(__microblaze__)
|
---|
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,
|
---|
995 | * adding v, then subtrating the current address
|
---|
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 |
|
---|
1004 | /* Adjust relative offset. -4 adjustment required
|
---|
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. */
|
---|
1132 | n = xmalloc(sizeof *n);
|
---|
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 |
|
---|
1542 | #elif defined(__v850e__)
|
---|
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 |
|
---|
1637 | #if defined(USE_PLT_ENTRIES)
|
---|
1638 |
|
---|
1639 | bb_use_plt:
|
---|
1640 |
|
---|
1641 | /* find the plt entry and initialize it if necessary */
|
---|
1642 |
|
---|
1643 | #if defined(USE_PLT_LIST)
|
---|
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
|
---|
1665 | #if defined(__v850e__)
|
---|
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.... */
|
---|
1678 | #if defined(__arm__) || defined(__powerpc__)
|
---|
1679 | if ((int)v < -0x02000000 || (int)v >= 0x02000000)
|
---|
1680 | #elif defined(__v850e__)
|
---|
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 |
|
---|
1686 | #if defined(__v850e__)
|
---|
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
|
---|
1703 | #if defined(__v850e__)
|
---|
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;
|
---|
1714 | #endif /* USE_PLT_ENTRIES */
|
---|
1715 |
|
---|
1716 | #if defined(USE_GOT_ENTRIES)
|
---|
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 |
|
---|
1732 | #endif /* USE_GOT_ENTRIES */
|
---|
1733 | }
|
---|
1734 |
|
---|
1735 | return ret;
|
---|
1736 | }
|
---|
1737 |
|
---|
1738 |
|
---|
1739 | #if defined(USE_LIST)
|
---|
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 |
|
---|
1766 | #if defined(USE_SINGLE)
|
---|
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 |
|
---|
1782 | #if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
|
---|
1783 |
|
---|
1784 | static struct obj_section *arch_xsect_init(struct obj_file *f, const char *name,
|
---|
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 | {
|
---|
1807 | #if defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES)
|
---|
1808 | struct arch_file *ifile = (struct arch_file *) f;
|
---|
1809 | int i;
|
---|
1810 | #if defined(USE_GOT_ENTRIES)
|
---|
1811 | int got_offset = 0, got_needed = 0, got_allocate;
|
---|
1812 | #endif
|
---|
1813 | #if defined(USE_PLT_ENTRIES)
|
---|
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 |
|
---|
1838 | #if defined(USE_GOT_ENTRIES)
|
---|
1839 | got_allocate = 0;
|
---|
1840 | #endif
|
---|
1841 | #if defined(USE_PLT_ENTRIES)
|
---|
1842 | plt_allocate = 0;
|
---|
1843 | #endif
|
---|
1844 |
|
---|
1845 | switch (ELF_R_TYPE(rel->r_info)) {
|
---|
1846 | #if defined(__arm__)
|
---|
1847 | case R_ARM_PC24:
|
---|
1848 | case R_ARM_PLT32:
|
---|
1849 | plt_allocate = 1;
|
---|
1850 | break;
|
---|
1851 |
|
---|
1852 | case R_ARM_GOTOFF:
|
---|
1853 | case R_ARM_GOTPC:
|
---|
1854 | got_needed = 1;
|
---|
1855 | continue;
|
---|
1856 |
|
---|
1857 | case R_ARM_GOT32:
|
---|
1858 | got_allocate = 1;
|
---|
1859 | break;
|
---|
1860 |
|
---|
1861 | #elif defined(__i386__)
|
---|
1862 | case R_386_GOTPC:
|
---|
1863 | case R_386_GOTOFF:
|
---|
1864 | got_needed = 1;
|
---|
1865 | continue;
|
---|
1866 |
|
---|
1867 | case R_386_GOT32:
|
---|
1868 | got_allocate = 1;
|
---|
1869 | break;
|
---|
1870 |
|
---|
1871 | #elif defined(__powerpc__)
|
---|
1872 | case R_PPC_REL24:
|
---|
1873 | plt_allocate = 1;
|
---|
1874 | break;
|
---|
1875 |
|
---|
1876 | #elif defined(__mc68000__)
|
---|
1877 | case R_68K_GOT32:
|
---|
1878 | got_allocate = 1;
|
---|
1879 | break;
|
---|
1880 |
|
---|
1881 | #ifdef R_68K_GOTOFF
|
---|
1882 | case R_68K_GOTOFF:
|
---|
1883 | got_needed = 1;
|
---|
1884 | continue;
|
---|
1885 | #endif
|
---|
1886 |
|
---|
1887 | #elif defined(__sh__)
|
---|
1888 | case R_SH_GOT32:
|
---|
1889 | got_allocate = 1;
|
---|
1890 | break;
|
---|
1891 |
|
---|
1892 | case R_SH_GOTPC:
|
---|
1893 | case R_SH_GOTOFF:
|
---|
1894 | got_needed = 1;
|
---|
1895 | continue;
|
---|
1896 |
|
---|
1897 | #elif defined(__v850e__)
|
---|
1898 | case R_V850_22_PCREL:
|
---|
1899 | plt_needed = 1;
|
---|
1900 | break;
|
---|
1901 |
|
---|
1902 | #endif
|
---|
1903 | default:
|
---|
1904 | continue;
|
---|
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);
|
---|
1913 | #if defined(USE_GOT_ENTRIES)
|
---|
1914 | if (got_allocate) {
|
---|
1915 | got_offset += arch_single_init(
|
---|
1916 | rel, &intsym->gotent,
|
---|
1917 | got_offset, GOT_ENTRY_SIZE);
|
---|
1918 |
|
---|
1919 | got_needed = 1;
|
---|
1920 | }
|
---|
1921 | #endif
|
---|
1922 | #if defined(USE_PLT_ENTRIES)
|
---|
1923 | if (plt_allocate) {
|
---|
1924 | #if defined(USE_PLT_LIST)
|
---|
1925 | plt_offset += arch_list_add(
|
---|
1926 | rel, &intsym->pltent,
|
---|
1927 | plt_offset, PLT_ENTRY_SIZE);
|
---|
1928 | #else
|
---|
1929 | plt_offset += arch_single_init(
|
---|
1930 | rel, &intsym->pltent,
|
---|
1931 | plt_offset, PLT_ENTRY_SIZE);
|
---|
1932 | #endif
|
---|
1933 | plt_needed = 1;
|
---|
1934 | }
|
---|
1935 | #endif
|
---|
1936 | }
|
---|
1937 | }
|
---|
1938 |
|
---|
1939 | #if defined(USE_GOT_ENTRIES)
|
---|
1940 | if (got_needed) {
|
---|
1941 | ifile->got = arch_xsect_init(f, ".got", got_offset,
|
---|
1942 | GOT_ENTRY_SIZE);
|
---|
1943 | }
|
---|
1944 | #endif
|
---|
1945 |
|
---|
1946 | #if defined(USE_PLT_ENTRIES)
|
---|
1947 | if (plt_needed) {
|
---|
1948 | ifile->plt = arch_xsect_init(f, ".plt", plt_offset,
|
---|
1949 | PLT_ENTRY_SIZE);
|
---|
1950 | }
|
---|
1951 | #endif
|
---|
1952 |
|
---|
1953 | #endif /* defined(USE_GOT_ENTRIES) || defined(USE_PLT_ENTRIES) */
|
---|
1954 | }
|
---|
1955 |
|
---|
1956 | /*======================================================================*/
|
---|
1957 |
|
---|
1958 | /* Standard ELF hash function. */
|
---|
1959 | static unsigned long obj_elf_hash_n(const char *name, unsigned long n)
|
---|
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 |
|
---|
1982 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
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 |
|
---|
2034 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
2035 |
|
---|
2036 | static struct obj_symbol *
|
---|
2037 | obj_add_symbol(struct obj_file *f, const char *name,
|
---|
2038 | unsigned long symidx, int info,
|
---|
2039 | int secidx, ElfW(Addr) value,
|
---|
2040 | unsigned long size)
|
---|
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 |
|
---|
2144 | static ElfW(Addr) obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym)
|
---|
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,
|
---|
2203 | const char *name,
|
---|
2204 | unsigned long align,
|
---|
2205 | unsigned long size)
|
---|
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,
|
---|
2229 | const char *name,
|
---|
2230 | unsigned long align,
|
---|
2231 | unsigned long size)
|
---|
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
|
---|
2281 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
|
---|
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) {
|
---|
2301 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
|
---|
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;
|
---|
2315 | size_t name_size = strlen(name) + extra;
|
---|
2316 | if (name_size > name_alloced_size) {
|
---|
2317 | name_alloced_size = name_size * 2;
|
---|
2318 | name_buf = alloca(name_alloced_size);
|
---|
2319 | }
|
---|
2320 | strcpy(name_buf, SYMBOL_PREFIX);
|
---|
2321 | strcpy(name_buf + extra - 1, name);
|
---|
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. */
|
---|
2329 | name = xmalloc(name_size);
|
---|
2330 | strcpy(name, name_buf);
|
---|
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 |
|
---|
2353 | for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) {
|
---|
2354 | if (m->nsyms
|
---|
2355 | && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, m->nsyms)
|
---|
2356 | ) {
|
---|
2357 | m->used = 1;
|
---|
2358 | ++nused;
|
---|
2359 | }
|
---|
2360 | }
|
---|
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
|
---|
2429 | sym_name = alloca(strlen(key) + sizeof SYMBOL_PREFIX);
|
---|
2430 | strcpy(sym_name, SYMBOL_PREFIX);
|
---|
2431 | strcat(sym_name, key);
|
---|
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) {
|
---|
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;
|
---|
2493 |
|
---|
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')
|
---|
2507 | c = (c * 8) + *++q - '0';
|
---|
2508 | }
|
---|
2509 | *r = c;
|
---|
2510 | }
|
---|
2511 | break;
|
---|
2512 |
|
---|
2513 | default:
|
---|
2514 | *r = *q;
|
---|
2515 | break;
|
---|
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;
|
---|
2546 | q = (char*)"";
|
---|
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 {
|
---|
2555 | /* Array of chars (in fact, matrix!) */
|
---|
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) {
|
---|
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;
|
---|
2596 |
|
---|
2597 | default:
|
---|
2598 | bb_error_msg("unknown parameter type '%c' for %s", *p, key);
|
---|
2599 | return 0;
|
---|
2600 | }
|
---|
2601 | }
|
---|
2602 |
|
---|
2603 | retry_end_of_value:
|
---|
2604 | switch (*q) {
|
---|
2605 | case '\0':
|
---|
2606 | goto end_of_arg;
|
---|
2607 |
|
---|
2608 | case ' ':
|
---|
2609 | case '\t':
|
---|
2610 | case '\n':
|
---|
2611 | case '\r':
|
---|
2612 | ++q;
|
---|
2613 | goto retry_end_of_value;
|
---|
2614 |
|
---|
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;
|
---|
2622 |
|
---|
2623 | default:
|
---|
2624 | bb_error_msg("invalid argument syntax for %s", key);
|
---|
2625 | return 0;
|
---|
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 |
|
---|
2641 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
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)
|
---|
2646 | return xatoi(p);
|
---|
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 |
|
---|
2677 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
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 |
|
---|
2706 | if (nmod) {
|
---|
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 |
|
---|
2807 | #if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
|
---|
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;
|
---|
2830 | /* Empty section might be byte-aligned */
|
---|
2831 | sec->header.sh_addralign = tgt_sizeof_void_p;
|
---|
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 | }
|
---|
2837 | #endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
|
---|
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 |
|
---|
2868 | if (!flag_noexport && !obj_find_section(f, "__ksymtab")) {
|
---|
2869 | size_t nsyms;
|
---|
2870 | int *loaded;
|
---|
2871 |
|
---|
2872 | sec = obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, 0);
|
---|
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
|
---|
3261 | (f, targsec, symsec, intsym, rel, value)
|
---|
3262 | ) {
|
---|
3263 | case obj_reloc_ok:
|
---|
3264 | break;
|
---|
3265 |
|
---|
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";
|
---|
3274 | bad_reloc:
|
---|
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;
|
---|
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 |
|
---|
3412 | if (sec->header.sh_size) {
|
---|
3413 | switch (sec->header.sh_type) {
|
---|
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;
|
---|
3464 | }
|
---|
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) {
|
---|
3490 | case SHT_SYMTAB:
|
---|
3491 | {
|
---|
3492 | unsigned long nsym, j;
|
---|
3493 | char *strtab;
|
---|
3494 | ElfW(Sym) * sym;
|
---|
3495 |
|
---|
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 | }
|
---|
3502 |
|
---|
3503 | nsym = sec->header.sh_size / sizeof(ElfW(Sym));
|
---|
3504 | strtab = f->sections[sec->header.sh_link]->contents;
|
---|
3505 | sym = (ElfW(Sym) *) sec->contents;
|
---|
3506 |
|
---|
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 *));
|
---|
3510 |
|
---|
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;
|
---|
3521 | #if defined(__SH5__)
|
---|
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;
|
---|
3530 | #endif
|
---|
3531 |
|
---|
3532 | obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx,
|
---|
3533 | val, sym->st_size);
|
---|
3534 | }
|
---|
3535 | }
|
---|
3536 | break;
|
---|
3537 |
|
---|
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(). */
|
---|
3550 | }
|
---|
3551 | }
|
---|
3552 |
|
---|
3553 | return f;
|
---|
3554 | }
|
---|
3555 |
|
---|
3556 | #if ENABLE_FEATURE_INSMOD_LOADINKMEM
|
---|
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) {
|
---|
3579 | bb_perror_msg("error reading ELF section data");
|
---|
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 |
|
---|
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 | }
|
---|
3605 | }
|
---|
3606 |
|
---|
3607 |
|
---|
3608 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
|
---|
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 | */
|
---|
3616 | static const char *const gpl_licenses[] = {
|
---|
3617 | "GPL",
|
---|
3618 | "GPL v2",
|
---|
3619 | "GPL and additional rights",
|
---|
3620 | "Dual BSD/GPL",
|
---|
3621 | "Dual MPL/GPL"
|
---|
3622 | };
|
---|
3623 |
|
---|
3624 | sec = obj_find_section(f, ".modinfo");
|
---|
3625 | if (sec) {
|
---|
3626 | const char *value, *ptr, *endptr;
|
---|
3627 | ptr = sec->contents;
|
---|
3628 | endptr = ptr + sec->header.sh_size;
|
---|
3629 | while (ptr < endptr) {
|
---|
3630 | value = strchr(ptr, '=');
|
---|
3631 | if (value && strncmp(ptr, "license", value-ptr) == 0) {
|
---|
3632 | int i;
|
---|
3633 | if (license)
|
---|
3634 | *license = value+1;
|
---|
3635 | for (i = 0; i < ARRAY_SIZE(gpl_licenses); ++i) {
|
---|
3636 | if (strcmp(value+1, gpl_licenses[i]) == 0)
|
---|
3637 | return 0;
|
---|
3638 | }
|
---|
3639 | return 2;
|
---|
3640 | }
|
---|
3641 | if (strchr(ptr, '\0'))
|
---|
3642 | ptr = strchr(ptr, '\0') + 1;
|
---|
3643 | else
|
---|
3644 | ptr = endptr;
|
---|
3645 | }
|
---|
3646 | }
|
---|
3647 | return 1;
|
---|
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 | {
|
---|
3659 | static smallint printed_info;
|
---|
3660 |
|
---|
3661 | char buf[80];
|
---|
3662 | int oldval;
|
---|
3663 |
|
---|
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);
|
---|
3668 | if (!printed_info) {
|
---|
3669 | printf(" See %s for information about tainted modules\n", TAINT_URL);
|
---|
3670 | printed_info = 1;
|
---|
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 | {
|
---|
3684 | static const char tainted_file[] ALIGN1 = TAINT_FILENAME;
|
---|
3685 |
|
---|
3686 | int fd, kernel_has_tainted;
|
---|
3687 | const char *ptr;
|
---|
3688 |
|
---|
3689 | kernel_has_tainted = 1;
|
---|
3690 | fd = open(tainted_file, O_RDWR);
|
---|
3691 | if (fd < 0) {
|
---|
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 | }
|
---|
3726 | #else /* FEATURE_CHECK_TAINTED_MODULE */
|
---|
3727 | #define check_tainted_module(x, y) do { } while (0);
|
---|
3728 | #endif /* FEATURE_CHECK_TAINTED_MODULE */
|
---|
3729 |
|
---|
3730 | #if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
|
---|
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 | {
|
---|
3738 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
3739 | return new_get_module_version(f, str);
|
---|
3740 | #else /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
3741 | strncpy(str, "???", sizeof(str));
|
---|
3742 | return -1;
|
---|
3743 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
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 | {
|
---|
3754 | static const char symprefix[] ALIGN1 = "__insmod_";
|
---|
3755 |
|
---|
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)) {
|
---|
3772 | absolute_filename = xstrdup(real);
|
---|
3773 | } else {
|
---|
3774 | bb_perror_msg("cannot get realpath for %s", filename);
|
---|
3775 | absolute_filename = xstrdup(filename);
|
---|
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 | */
|
---|
3785 | use_ksymtab = obj_find_section(f, "__ksymtab") || flag_noexport;
|
---|
3786 |
|
---|
3787 | sec = obj_find_section(f, ".this");
|
---|
3788 | if (sec) {
|
---|
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 |
|
---|
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) {
|
---|
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 | }
|
---|
3859 | #endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
|
---|
3860 |
|
---|
3861 | #if ENABLE_FEATURE_INSMOD_LOAD_MAP
|
---|
3862 | static void print_load_map(struct obj_file *f)
|
---|
3863 | {
|
---|
3864 | struct obj_section *sec;
|
---|
3865 | #if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
|
---|
3866 | struct obj_symbol **all, **p;
|
---|
3867 | int i, nsyms, *loaded;
|
---|
3868 | struct obj_symbol *sym;
|
---|
3869 | #endif
|
---|
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 | }
|
---|
3891 | #if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
|
---|
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 | }
|
---|
3951 | #else /* !FEATURE_INSMOD_LOAD_MAP */
|
---|
3952 | void print_load_map(struct obj_file *f);
|
---|
3953 | #endif
|
---|
3954 |
|
---|
3955 | int insmod_main( int argc, char **argv);
|
---|
3956 | int insmod_main( int argc, char **argv)
|
---|
3957 | {
|
---|
3958 | char *opt_o, *arg1;
|
---|
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;
|
---|
3969 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
3970 | struct utsname uts_info;
|
---|
3971 | char m_strversion[STRVERSIONLEN];
|
---|
3972 | int m_version, m_crcs;
|
---|
3973 | #endif
|
---|
3974 | #if ENABLE_FEATURE_CLEAN_UP
|
---|
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 */
|
---|
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 | }
|
---|
3989 |
|
---|
3990 | if (arg1 == NULL) {
|
---|
3991 | bb_show_usage();
|
---|
3992 | }
|
---|
3993 |
|
---|
3994 | /* Grab the module name */
|
---|
3995 | tmp1 = xstrdup(arg1);
|
---|
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 |
|
---|
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;
|
---|
4010 | tmp[len] = '\0';
|
---|
4011 | } else
|
---|
4012 | #endif
|
---|
4013 | if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') {
|
---|
4014 | len -= 2;
|
---|
4015 | tmp[len] = '\0';
|
---|
4016 | }
|
---|
4017 |
|
---|
4018 |
|
---|
4019 | #if ENABLE_FEATURE_2_6_MODULES
|
---|
4020 | if (k_version > 4)
|
---|
4021 | m_fullName = xasprintf("%s.ko", tmp);
|
---|
4022 | else
|
---|
4023 | #endif
|
---|
4024 | m_fullName = xasprintf("%s.o", tmp);
|
---|
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 */
|
---|
4034 | if (stat(arg1, &st) < 0 || !S_ISREG(st.st_mode)
|
---|
4035 | || (fp = fopen(arg1, "r")) == NULL
|
---|
4036 | ) {
|
---|
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... */
|
---|
4050 | if (realpath(tmdn, real_module_dir) == NULL)
|
---|
4051 | module_dir = tmdn;
|
---|
4052 | else
|
---|
4053 | module_dir = real_module_dir;
|
---|
4054 | recursive_action(module_dir, ACTION_RECURSE,
|
---|
4055 | check_module_name_match, 0, m_fullName, 0);
|
---|
4056 | free(tmdn);
|
---|
4057 | }
|
---|
4058 |
|
---|
4059 | /* Check if we have found anything yet */
|
---|
4060 | if (m_filename == 0 || ((fp = fopen(m_filename, "r")) == NULL)) {
|
---|
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/ */
|
---|
4069 | if (!recursive_action(module_dir, ACTION_RECURSE,
|
---|
4070 | check_module_name_match, 0, m_fullName, 0)
|
---|
4071 | ) {
|
---|
4072 | if (m_filename == 0
|
---|
4073 | || ((fp = fopen(m_filename, "r")) == NULL)
|
---|
4074 | ) {
|
---|
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
|
---|
4082 | m_filename = xstrdup(arg1);
|
---|
4083 |
|
---|
4084 | if (flag_verbose)
|
---|
4085 | printf("Using %s\n", m_filename);
|
---|
4086 |
|
---|
4087 | #if ENABLE_FEATURE_2_6_MODULES
|
---|
4088 | if (k_version > 4) {
|
---|
4089 | argv[optind] = m_filename;
|
---|
4090 | optind--;
|
---|
4091 | return insmod_ng_main(argc - optind, argv + optind);
|
---|
4092 | }
|
---|
4093 | #endif
|
---|
4094 |
|
---|
4095 | f = obj_load(fp, LOADBITS);
|
---|
4096 | if (f == NULL)
|
---|
4097 | bb_perror_msg_and_die("cannot load the module");
|
---|
4098 |
|
---|
4099 | if (get_modinfo_value(f, "kernel_version") == NULL)
|
---|
4100 | m_has_modinfo = 0;
|
---|
4101 | else
|
---|
4102 | m_has_modinfo = 1;
|
---|
4103 |
|
---|
4104 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
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) {
|
---|
4112 | bb_error_msg("cannot find the kernel version the module was "
|
---|
4113 | "compiled for");
|
---|
4114 | goto out;
|
---|
4115 | }
|
---|
4116 | }
|
---|
4117 |
|
---|
4118 | if (strncmp(uts_info.release, m_strversion, STRVERSIONLEN) != 0) {
|
---|
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)
|
---|
4125 | goto out;
|
---|
4126 | }
|
---|
4127 | }
|
---|
4128 | k_crcs = 0;
|
---|
4129 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
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 {
|
---|
4136 | bb_error_msg("not configured to support old kernels");
|
---|
4137 | goto out;
|
---|
4138 | }
|
---|
4139 |
|
---|
4140 | #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
|
---|
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);
|
---|
4147 | #endif /* FEATURE_INSMOD_VERSION_CHECKING */
|
---|
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 |
|
---|
4154 | if (!new_create_this_module(f, m_name)) {
|
---|
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) {
|
---|
4167 | if (!new_process_module_arguments(f, argc - optind, argv + optind)) {
|
---|
4168 | goto out;
|
---|
4169 | }
|
---|
4170 | }
|
---|
4171 |
|
---|
4172 | arch_create_got(f);
|
---|
4173 | hide_special_symbols(f);
|
---|
4174 |
|
---|
4175 | #if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
|
---|
4176 | add_ksymoops_symbols(f, m_filename, m_name);
|
---|
4177 | #endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
|
---|
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:
|
---|
4188 | bb_error_msg("a module named %s already exists", m_name);
|
---|
4189 | goto out;
|
---|
4190 | case ENOMEM:
|
---|
4191 | bb_error_msg("can't allocate kernel memory for module; needed %lu bytes",
|
---|
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 |
|
---|
4215 | if (!new_init_module(m_name, f, m_size)) {
|
---|
4216 | delete_module(m_name);
|
---|
4217 | goto out;
|
---|
4218 | }
|
---|
4219 |
|
---|
4220 | if (flag_print_load_map)
|
---|
4221 | print_load_map(f);
|
---|
4222 |
|
---|
4223 | exit_status = EXIT_SUCCESS;
|
---|
4224 |
|
---|
4225 | out:
|
---|
4226 | #if ENABLE_FEATURE_CLEAN_UP
|
---|
4227 | if (fp)
|
---|
4228 | fclose(fp);
|
---|
4229 | free(tmp1);
|
---|
4230 | if (!tmp1)
|
---|
4231 | free(m_name);
|
---|
4232 | free(m_filename);
|
---|
4233 | #endif
|
---|
4234 | return exit_status;
|
---|
4235 | }
|
---|
4236 |
|
---|
4237 |
|
---|
4238 | #endif
|
---|
4239 |
|
---|
4240 |
|
---|
4241 | #if ENABLE_FEATURE_2_6_MODULES
|
---|
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) {
|
---|
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);
|
---|
4261 | }
|
---|
4262 | }
|
---|
4263 |
|
---|
4264 | int insmod_ng_main(int argc, char **argv);
|
---|
4265 | int insmod_ng_main(int argc, char **argv)
|
---|
4266 | {
|
---|
4267 | long ret;
|
---|
4268 | size_t len;
|
---|
4269 | int optlen;
|
---|
4270 | void *map;
|
---|
4271 | char *filename, *options;
|
---|
4272 |
|
---|
4273 | filename = *++argv;
|
---|
4274 | if (!filename)
|
---|
4275 | bb_show_usage();
|
---|
4276 |
|
---|
4277 | /* Rest is options */
|
---|
4278 | options = xzalloc(1);
|
---|
4279 | optlen = 0;
|
---|
4280 | while (*++argv) {
|
---|
4281 | options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
|
---|
4282 | /* Spaces handled by "" pairs, but no way of escaping quotes */
|
---|
4283 | optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
|
---|
4284 | }
|
---|
4285 |
|
---|
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);
|
---|
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) {
|
---|
4296 | bb_perror_msg_and_die("cannot mmap '%s'", filename);
|
---|
4297 | }
|
---|
4298 |
|
---|
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 |
|
---|
4309 | ret = syscall(__NR_init_module, map, len, options);
|
---|
4310 | if (ret != 0) {
|
---|
4311 | bb_perror_msg_and_die("cannot insert '%s': %s (%li)",
|
---|
4312 | filename, moderror(errno), ret);
|
---|
4313 | }
|
---|
4314 |
|
---|
4315 | return 0;
|
---|
4316 | }
|
---|
4317 |
|
---|
4318 | #endif
|
---|