[821] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * Mini insmod implementation for busybox
|
---|
| 4 | *
|
---|
| 5 | * This version of insmod supports ARM, CRIS, H8/300, x86, ia64, x86_64,
|
---|
| 6 | * m68k, MIPS, PowerPC, S390, SH3/4/5, Sparc, v850e, and x86_64.
|
---|
| 7 | *
|
---|
| 8 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
---|
| 9 | * and Ron Alder <alder@lineo.com>
|
---|
| 10 | *
|
---|
| 11 | * Rodney Radford <rradford@mindspring.com> 17-Aug-2004.
|
---|
| 12 | * Added x86_64 support.
|
---|
| 13 | *
|
---|
| 14 | * Miles Bader <miles@gnu.org> added NEC V850E support.
|
---|
| 15 | *
|
---|
| 16 | * Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4
|
---|
| 17 | * and (theoretically) SH3. I have only tested SH4 in little endian mode.
|
---|
| 18 | *
|
---|
| 19 | * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
|
---|
| 20 | * Nicolas Ferre <nicolas.ferre@alcove.fr> to support ARM7TDMI. Only
|
---|
| 21 | * very minor changes required to also work with StrongArm and presumably
|
---|
| 22 | * all ARM based systems.
|
---|
| 23 | *
|
---|
| 24 | * Yoshinori Sato <ysato@users.sourceforge.jp> 19-May-2004.
|
---|
| 25 | * added Renesas H8/300 support.
|
---|
| 26 | *
|
---|
| 27 | * Paul Mundt <lethal@linux-sh.org> 08-Aug-2003.
|
---|
| 28 | * Integrated support for sh64 (SH-5), from preliminary modutils
|
---|
| 29 | * patches from Benedict Gaster <benedict.gaster@superh.com>.
|
---|
| 30 | * Currently limited to support for 32bit ABI.
|
---|
| 31 | *
|
---|
| 32 | * Magnus Damm <damm@opensource.se> 22-May-2002.
|
---|
| 33 | * The plt and got code are now using the same structs.
|
---|
| 34 | * Added generic linked list code to fully support PowerPC.
|
---|
| 35 | * Replaced the mess in arch_apply_relocation() with architecture blocks.
|
---|
| 36 | * The arch_create_got() function got cleaned up with architecture blocks.
|
---|
| 37 | * These blocks should be easy maintain and sync with obj_xxx.c in modutils.
|
---|
| 38 | *
|
---|
| 39 | * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001.
|
---|
| 40 | * PowerPC specific code stolen from modutils-2.3.16,
|
---|
| 41 | * written by Paul Mackerras, Copyright 1996, 1997 Linux International.
|
---|
| 42 | * I've only tested the code on mpc8xx platforms in big-endian mode.
|
---|
| 43 | * Did some cleanup and added CONFIG_USE_xxx_ENTRIES...
|
---|
| 44 | *
|
---|
| 45 | * Quinn Jensen <jensenq@lineo.com> added MIPS support 23-Feb-2001.
|
---|
| 46 | * based on modutils-2.4.2
|
---|
| 47 | * MIPS specific support for Elf loading and relocation.
|
---|
| 48 | * Copyright 1996, 1997 Linux International.
|
---|
| 49 | * Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu>
|
---|
| 50 | *
|
---|
| 51 | * Based almost entirely on the Linux modutils-2.3.11 implementation.
|
---|
| 52 | * Copyright 1996, 1997 Linux International.
|
---|
| 53 | * New implementation contributed by Richard Henderson <rth@tamu.edu>
|
---|
| 54 | * Based on original work by Bjorn Ekwall <bj0rn@blox.se>
|
---|
| 55 | * Restructured (and partly rewritten) by:
|
---|
| 56 | * Björn Ekwall <bj0rn@blox.se> February 1999
|
---|
| 57 | *
|
---|
| 58 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
| 59 | */
|
---|
| 60 |
|
---|
| 61 | #include "busybox.h"
|
---|
| 62 | #include <stdlib.h>
|
---|
| 63 | #include <stdio.h>
|
---|
| 64 | #include <stddef.h>
|
---|
| 65 | #include <errno.h>
|
---|
| 66 | #include <unistd.h>
|
---|
| 67 | #include <dirent.h>
|
---|
| 68 | #include <ctype.h>
|
---|
| 69 | #include <assert.h>
|
---|
| 70 | #include <string.h>
|
---|
| 71 | #include <getopt.h>
|
---|
| 72 | #include <fcntl.h>
|
---|
| 73 | #include <sys/utsname.h>
|
---|
| 74 |
|
---|
| 75 | #if !defined(CONFIG_FEATURE_2_4_MODULES) && \
|
---|
| 76 | !defined(CONFIG_FEATURE_2_6_MODULES)
|
---|
| 77 | #define CONFIG_FEATURE_2_4_MODULES
|
---|
| 78 | #endif
|
---|
| 79 |
|
---|
| 80 | #if !defined(CONFIG_FEATURE_2_4_MODULES)
|
---|
| 81 | #define insmod_ng_main insmod_main
|
---|
| 82 | #endif
|
---|
| 83 |
|
---|
| 84 | #if defined(CONFIG_FEATURE_2_6_MODULES)
|
---|
| 85 | extern int insmod_ng_main( int argc, char **argv);
|
---|
| 86 | #endif
|
---|
| 87 |
|
---|
| 88 |
|
---|
| 89 | #if defined(CONFIG_FEATURE_2_4_MODULES)
|
---|
| 90 |
|
---|
| 91 |
|
---|
| 92 | #ifdef CONFIG_FEATURE_INSMOD_LOADINKMEM
|
---|
| 93 | #define LOADBITS 0
|
---|
| 94 | #else
|
---|
| 95 | #define LOADBITS 1
|
---|
| 96 | #endif
|
---|
| 97 |
|
---|
| 98 |
|
---|
| 99 | /* Alpha */
|
---|
| 100 | #if defined(__alpha__)
|
---|
| 101 | #define MATCH_MACHINE(x) (x == EM_ALPHA)
|
---|
| 102 | #define SHT_RELM SHT_RELA
|
---|
| 103 | #define Elf64_RelM Elf64_Rela
|
---|
| 104 | #define ELFCLASSM ELFCLASS64
|
---|
| 105 | #endif
|
---|
| 106 |
|
---|
| 107 | /* ARM support */
|
---|
| 108 | #if defined(__arm__)
|
---|
| 109 | #define MATCH_MACHINE(x) (x == EM_ARM)
|
---|
| 110 | #define SHT_RELM SHT_REL
|
---|
| 111 | #define Elf32_RelM Elf32_Rel
|
---|
| 112 | #define ELFCLASSM ELFCLASS32
|
---|
| 113 | #define CONFIG_USE_PLT_ENTRIES
|
---|
| 114 | #define CONFIG_PLT_ENTRY_SIZE 8
|
---|
| 115 | #define CONFIG_USE_GOT_ENTRIES
|
---|
| 116 | #define CONFIG_GOT_ENTRY_SIZE 8
|
---|
| 117 | #define CONFIG_USE_SINGLE
|
---|
| 118 | #endif
|
---|
| 119 |
|
---|
| 120 | /* blackfin */
|
---|
| 121 | #if defined(BFIN)
|
---|
| 122 | #define MATCH_MACHINE(x) (x == EM_BLACKFIN)
|
---|
| 123 | #define SHT_RELM SHT_RELA
|
---|
| 124 | #define Elf32_RelM Elf32_Rela
|
---|
| 125 | #define ELFCLASSM ELFCLASS32
|
---|
| 126 | #endif
|
---|
| 127 |
|
---|
| 128 | /* CRIS */
|
---|
| 129 | #if defined(__cris__)
|
---|
| 130 | #define MATCH_MACHINE(x) (x == EM_CRIS)
|
---|
| 131 | #define SHT_RELM SHT_RELA
|
---|
| 132 | #define Elf32_RelM Elf32_Rela
|
---|
| 133 | #define ELFCLASSM ELFCLASS32
|
---|
| 134 | #ifndef EM_CRIS
|
---|
| 135 | #define EM_CRIS 76
|
---|
| 136 | #define R_CRIS_NONE 0
|
---|
| 137 | #define R_CRIS_32 3
|
---|
| 138 | #endif
|
---|
| 139 | #endif
|
---|
| 140 |
|
---|
| 141 | /* H8/300 */
|
---|
| 142 | #if defined(__H8300H__) || defined(__H8300S__)
|
---|
| 143 | #define MATCH_MACHINE(x) (x == EM_H8_300)
|
---|
| 144 | #define SHT_RELM SHT_RELA
|
---|
| 145 | #define Elf32_RelM Elf32_Rela
|
---|
| 146 | #define ELFCLASSM ELFCLASS32
|
---|
| 147 | #define CONFIG_USE_SINGLE
|
---|
| 148 | #define SYMBOL_PREFIX "_"
|
---|
| 149 | #endif
|
---|
| 150 |
|
---|
| 151 | /* PA-RISC / HP-PA */
|
---|
| 152 | #if defined(__hppa__)
|
---|
| 153 | #define MATCH_MACHINE(x) (x == EM_PARISC)
|
---|
| 154 | #define SHT_RELM SHT_RELA
|
---|
| 155 | #if defined(__LP64__)
|
---|
| 156 | #define Elf64_RelM Elf64_Rela
|
---|
| 157 | #define ELFCLASSM ELFCLASS64
|
---|
| 158 | #else
|
---|
| 159 | #define Elf32_RelM Elf32_Rela
|
---|
| 160 | #define ELFCLASSM ELFCLASS32
|
---|
| 161 | #endif
|
---|
| 162 | #endif
|
---|
| 163 |
|
---|
| 164 | /* x86 */
|
---|
| 165 | #if defined(__i386__)
|
---|
| 166 | #ifndef EM_486
|
---|
| 167 | #define MATCH_MACHINE(x) (x == EM_386)
|
---|
| 168 | #else
|
---|
| 169 | #define MATCH_MACHINE(x) (x == EM_386 || x == EM_486)
|
---|
| 170 | #endif
|
---|
| 171 | #define SHT_RELM SHT_REL
|
---|
| 172 | #define Elf32_RelM Elf32_Rel
|
---|
| 173 | #define ELFCLASSM ELFCLASS32
|
---|
| 174 | #define CONFIG_USE_GOT_ENTRIES
|
---|
| 175 | #define CONFIG_GOT_ENTRY_SIZE 4
|
---|
| 176 | #define CONFIG_USE_SINGLE
|
---|
| 177 | #endif
|
---|
| 178 |
|
---|
| 179 | /* IA64, aka Itanium */
|
---|
| 180 | #if defined(__ia64__)
|
---|
| 181 | #define MATCH_MACHINE(x) (x == EM_IA_64)
|
---|
| 182 | #define SHT_RELM SHT_RELA
|
---|
| 183 | #define Elf64_RelM Elf64_Rela
|
---|
| 184 | #define ELFCLASSM ELFCLASS64
|
---|
| 185 | #endif
|
---|
| 186 |
|
---|
| 187 | /* m68k */
|
---|
| 188 | #if defined(__mc68000__)
|
---|
| 189 | #define MATCH_MACHINE(x) (x == EM_68K)
|
---|
| 190 | #define SHT_RELM SHT_RELA
|
---|
| 191 | #define Elf32_RelM Elf32_Rela
|
---|
| 192 | #define ELFCLASSM ELFCLASS32
|
---|
| 193 | #define CONFIG_USE_GOT_ENTRIES
|
---|
| 194 | #define CONFIG_GOT_ENTRY_SIZE 4
|
---|
| 195 | #define CONFIG_USE_SINGLE
|
---|
| 196 | #endif
|
---|
| 197 |
|
---|
| 198 | /* Microblaze */
|
---|
| 199 | #if defined(__microblaze__)
|
---|
| 200 | #define CONFIG_USE_SINGLE
|
---|
| 201 | #define MATCH_MACHINE(x) (x == EM_XILINX_MICROBLAZE)
|
---|
| 202 | #define SHT_RELM SHT_RELA
|
---|
| 203 | #define Elf32_RelM Elf32_Rela
|
---|
| 204 | #define ELFCLASSM ELFCLASS32
|
---|
| 205 | #endif
|
---|
| 206 |
|
---|
| 207 | /* MIPS */
|
---|
| 208 | #if defined(__mips__)
|
---|
| 209 | #define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE)
|
---|
| 210 | #define SHT_RELM SHT_REL
|
---|
| 211 | #define Elf32_RelM Elf32_Rel
|
---|
| 212 | #define ELFCLASSM ELFCLASS32
|
---|
| 213 | /* Account for ELF spec changes. */
|
---|
| 214 | #ifndef EM_MIPS_RS3_LE
|
---|
| 215 | #ifdef EM_MIPS_RS4_BE
|
---|
| 216 | #define EM_MIPS_RS3_LE EM_MIPS_RS4_BE
|
---|
| 217 | #else
|
---|
| 218 | #define EM_MIPS_RS3_LE 10
|
---|
| 219 | #endif
|
---|
| 220 | #endif /* !EM_MIPS_RS3_LE */
|
---|
| 221 | #define ARCHDATAM "__dbe_table"
|
---|
| 222 | #endif
|
---|
| 223 |
|
---|
| 224 | /* Nios II */
|
---|
| 225 | #if defined(__nios2__)
|
---|
| 226 | #define MATCH_MACHINE(x) (x == EM_ALTERA_NIOS2)
|
---|
| 227 | #define SHT_RELM SHT_RELA
|
---|
| 228 | #define Elf32_RelM Elf32_Rela
|
---|
| 229 | #define ELFCLASSM ELFCLASS32
|
---|
| 230 | #endif
|
---|
| 231 |
|
---|
| 232 | /* PowerPC */
|
---|
| 233 | #if defined(__powerpc64__)
|
---|
| 234 | #define MATCH_MACHINE(x) (x == EM_PPC64)
|
---|
| 235 | #define SHT_RELM SHT_RELA
|
---|
| 236 | #define Elf64_RelM Elf64_Rela
|
---|
| 237 | #define ELFCLASSM ELFCLASS64
|
---|
| 238 | #elif defined(__powerpc__)
|
---|
| 239 | #define MATCH_MACHINE(x) (x == EM_PPC)
|
---|
| 240 | #define SHT_RELM SHT_RELA
|
---|
| 241 | #define Elf32_RelM Elf32_Rela
|
---|
| 242 | #define ELFCLASSM ELFCLASS32
|
---|
| 243 | #define CONFIG_USE_PLT_ENTRIES
|
---|
| 244 | #define CONFIG_PLT_ENTRY_SIZE 16
|
---|
| 245 | #define CONFIG_USE_PLT_LIST
|
---|
| 246 | #define CONFIG_LIST_ARCHTYPE ElfW(Addr)
|
---|
| 247 | #define CONFIG_USE_LIST
|
---|
| 248 | #define ARCHDATAM "__ftr_fixup"
|
---|
| 249 | #endif
|
---|
| 250 |
|
---|
| 251 | /* S390 */
|
---|
| 252 | #if defined(__s390__)
|
---|
| 253 | #define MATCH_MACHINE(x) (x == EM_S390)
|
---|
| 254 | #define SHT_RELM SHT_RELA
|
---|
| 255 | #define Elf32_RelM Elf32_Rela
|
---|
| 256 | #define ELFCLASSM ELFCLASS32
|
---|
| 257 | #define CONFIG_USE_PLT_ENTRIES
|
---|
| 258 | #define CONFIG_PLT_ENTRY_SIZE 8
|
---|
| 259 | #define CONFIG_USE_GOT_ENTRIES
|
---|
| 260 | #define CONFIG_GOT_ENTRY_SIZE 8
|
---|
| 261 | #define CONFIG_USE_SINGLE
|
---|
| 262 | #endif
|
---|
| 263 |
|
---|
| 264 | /* SuperH */
|
---|
| 265 | #if defined(__sh__)
|
---|
| 266 | #define MATCH_MACHINE(x) (x == EM_SH)
|
---|
| 267 | #define SHT_RELM SHT_RELA
|
---|
| 268 | #define Elf32_RelM Elf32_Rela
|
---|
| 269 | #define ELFCLASSM ELFCLASS32
|
---|
| 270 | #define CONFIG_USE_GOT_ENTRIES
|
---|
| 271 | #define CONFIG_GOT_ENTRY_SIZE 4
|
---|
| 272 | #define CONFIG_USE_SINGLE
|
---|
| 273 | /* the SH changes have only been tested in =little endian= mode */
|
---|
| 274 | /* I'm not sure about big endian, so let's warn: */
|
---|
| 275 | #if defined(__sh__) && BB_BIG_ENDIAN
|
---|
| 276 | # error insmod.c may require changes for use on big endian SH
|
---|
| 277 | #endif
|
---|
| 278 | /* it may or may not work on the SH1/SH2... Error on those also */
|
---|
| 279 | #if ((!(defined(__SH3__) || defined(__SH4__) || defined(__SH5__)))) && (defined(__sh__))
|
---|
| 280 | #error insmod.c may require changes for SH1 or SH2 use
|
---|
| 281 | #endif
|
---|
| 282 | #endif
|
---|
| 283 |
|
---|
| 284 | /* Sparc */
|
---|
| 285 | #if defined(__sparc__)
|
---|
| 286 | #define MATCH_MACHINE(x) (x == EM_SPARC)
|
---|
| 287 | #define SHT_RELM SHT_RELA
|
---|
| 288 | #define Elf32_RelM Elf32_Rela
|
---|
| 289 | #define ELFCLASSM ELFCLASS32
|
---|
| 290 | #endif
|
---|
| 291 |
|
---|
| 292 | /* v850e */
|
---|
| 293 | #if defined (__v850e__)
|
---|
| 294 | #define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850)
|
---|
| 295 | #define SHT_RELM SHT_RELA
|
---|
| 296 | #define Elf32_RelM Elf32_Rela
|
---|
| 297 | #define ELFCLASSM ELFCLASS32
|
---|
| 298 | #define CONFIG_USE_PLT_ENTRIES
|
---|
| 299 | #define CONFIG_PLT_ENTRY_SIZE 8
|
---|
| 300 | #define CONFIG_USE_SINGLE
|
---|
| 301 | #ifndef EM_CYGNUS_V850 /* grumble */
|
---|
| 302 | #define EM_CYGNUS_V850 0x9080
|
---|
| 303 | #endif
|
---|
| 304 | #define SYMBOL_PREFIX "_"
|
---|
| 305 | #endif
|
---|
| 306 |
|
---|
| 307 | /* X86_64 */
|
---|
| 308 | #if defined(__x86_64__)
|
---|
| 309 | #define MATCH_MACHINE(x) (x == EM_X86_64)
|
---|
| 310 | #define SHT_RELM SHT_RELA
|
---|
| 311 | #define CONFIG_USE_GOT_ENTRIES
|
---|
| 312 | #define CONFIG_GOT_ENTRY_SIZE 8
|
---|
| 313 | #define CONFIG_USE_SINGLE
|
---|
| 314 | #define Elf64_RelM Elf64_Rela
|
---|
| 315 | #define ELFCLASSM ELFCLASS64
|
---|
| 316 | #endif
|
---|
| 317 |
|
---|
| 318 | #ifndef SHT_RELM
|
---|
| 319 | #error Sorry, but insmod.c does not yet support this architecture...
|
---|
| 320 | #endif
|
---|
| 321 |
|
---|
| 322 |
|
---|
| 323 | //----------------------------------------------------------------------------
|
---|
| 324 | //--------modutils module.h, lines 45-242
|
---|
| 325 | //----------------------------------------------------------------------------
|
---|
| 326 |
|
---|
| 327 | /* Definitions for the Linux module syscall interface.
|
---|
| 328 | Copyright 1996, 1997 Linux International.
|
---|
| 329 |
|
---|
| 330 | Contributed by Richard Henderson <rth@tamu.edu>
|
---|
| 331 |
|
---|
| 332 | This file is part of the Linux modutils.
|
---|
| 333 |
|
---|
| 334 | This program is free software; you can redistribute it and/or modify it
|
---|
| 335 | under the terms of the GNU General Public License as published by the
|
---|
| 336 | Free Software Foundation; either version 2 of the License, or (at your
|
---|
| 337 | option) any later version.
|
---|
| 338 |
|
---|
| 339 | This program is distributed in the hope that it will be useful, but
|
---|
| 340 | WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 341 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
---|
| 342 | General Public License for more details.
|
---|
| 343 |
|
---|
| 344 | You should have received a copy of the GNU General Public License
|
---|
| 345 | along with this program; if not, write to the Free Software Foundation,
|
---|
| 346 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
---|
| 347 |
|
---|
| 348 |
|
---|
| 349 | #ifndef MODUTILS_MODULE_H
|
---|
| 350 | /* Why? static const int MODUTILS_MODULE_H = 1;*/
|
---|
| 351 |
|
---|
| 352 | #ident "$Id: insmod.c,v 1.126 2004/12/26 09:13:32 vapier Exp $"
|
---|
| 353 |
|
---|
| 354 | /*======================================================================*/
|
---|
| 355 | /* For sizeof() which are related to the module platform and not to the
|
---|
| 356 | environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */
|
---|
| 357 |
|
---|
| 358 | #define tgt_sizeof_char sizeof(char)
|
---|
| 359 | #define tgt_sizeof_short sizeof(short)
|
---|
| 360 | #define tgt_sizeof_int sizeof(int)
|
---|
| 361 | #define tgt_sizeof_long sizeof(long)
|
---|
| 362 | #define tgt_sizeof_char_p sizeof(char *)
|
---|
| 363 | #define tgt_sizeof_void_p sizeof(void *)
|
---|
| 364 | #define tgt_long long
|
---|
| 365 |
|
---|
| 366 | #if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64)
|
---|
| 367 | #undef tgt_sizeof_long
|
---|
| 368 | #undef tgt_sizeof_char_p
|
---|
| 369 | #undef tgt_sizeof_void_p
|
---|
| 370 | #undef tgt_long
|
---|
| 371 | enum {
|
---|
| 372 | tgt_sizeof_long = 8,
|
---|
| 373 | tgt_sizeof_char_p = 8,
|
---|
| 374 | tgt_sizeof_void_p = 8
|
---|
| 375 | };
|
---|
| 376 | #define tgt_long long long
|
---|
| 377 | #endif
|
---|
| 378 |
|
---|
| 379 | /*======================================================================*/
|
---|
| 380 | /* The structures used in Linux 2.1. */
|
---|
| 381 |
|
---|
| 382 | /* Note: new_module_symbol does not use tgt_long intentionally */
|
---|
| 383 | struct new_module_symbol
|
---|
| 384 | {
|
---|
| 385 | unsigned long value;
|
---|
| 386 | unsigned long name;
|
---|
| 387 | };
|
---|
| 388 |
|
---|
| 389 | struct new_module_persist;
|
---|
| 390 |
|
---|
| 391 | struct new_module_ref
|
---|
| 392 | {
|
---|
| 393 | unsigned tgt_long dep; /* kernel addresses */
|
---|
| 394 | unsigned tgt_long ref;
|
---|
| 395 | unsigned tgt_long next_ref;
|
---|
| 396 | };
|
---|
| 397 |
|
---|
| 398 | struct new_module
|
---|
| 399 | {
|
---|
| 400 | unsigned tgt_long size_of_struct; /* == sizeof(module) */
|
---|
| 401 | unsigned tgt_long next;
|
---|
| 402 | unsigned tgt_long name;
|
---|
| 403 | unsigned tgt_long size;
|
---|
| 404 |
|
---|
| 405 | tgt_long usecount;
|
---|
| 406 | unsigned tgt_long flags; /* AUTOCLEAN et al */
|
---|
| 407 |
|
---|
| 408 | unsigned nsyms;
|
---|
| 409 | unsigned ndeps;
|
---|
| 410 |
|
---|
| 411 | unsigned tgt_long syms;
|
---|
| 412 | unsigned tgt_long deps;
|
---|
| 413 | unsigned tgt_long refs;
|
---|
| 414 | unsigned tgt_long init;
|
---|
| 415 | unsigned tgt_long cleanup;
|
---|
| 416 | unsigned tgt_long ex_table_start;
|
---|
| 417 | unsigned tgt_long ex_table_end;
|
---|
| 418 | #ifdef __alpha__
|
---|
| 419 | unsigned tgt_long gp;
|
---|
| 420 | #endif
|
---|
| 421 | /* Everything after here is extension. */
|
---|
| 422 | unsigned tgt_long persist_start;
|
---|
| 423 | unsigned tgt_long persist_end;
|
---|
| 424 | unsigned tgt_long can_unload;
|
---|
| 425 | unsigned tgt_long runsize;
|
---|
| 426 | const char *kallsyms_start; /* All symbols for kernel debugging */
|
---|
| 427 | const char *kallsyms_end;
|
---|
| 428 | const char *archdata_start; /* arch specific data for module */
|
---|
| 429 | const char *archdata_end;
|
---|
| 430 | const char *kernel_data; /* Reserved for kernel internal use */
|
---|
| 431 | };
|
---|
| 432 |
|
---|
| 433 | #ifdef ARCHDATAM
|
---|
| 434 | #define ARCHDATA_SEC_NAME ARCHDATAM
|
---|
| 435 | #else
|
---|
| 436 | #define ARCHDATA_SEC_NAME "__archdata"
|
---|
| 437 | #endif
|
---|
| 438 | #define KALLSYMS_SEC_NAME "__kallsyms"
|
---|
| 439 |
|
---|
| 440 |
|
---|
| 441 | struct new_module_info
|
---|
| 442 | {
|
---|
| 443 | unsigned long addr;
|
---|
| 444 | unsigned long size;
|
---|
| 445 | unsigned long flags;
|
---|
| 446 | long usecount;
|
---|
| 447 | };
|
---|
| 448 |
|
---|
| 449 | /* Bits of module.flags. */
|
---|
| 450 | enum {
|
---|
| 451 | NEW_MOD_RUNNING = 1,
|
---|
| 452 | NEW_MOD_DELETED = 2,
|
---|
| 453 | NEW_MOD_AUTOCLEAN = 4,
|
---|
| 454 | NEW_MOD_VISITED = 8,
|
---|
| 455 | NEW_MOD_USED_ONCE = 16
|
---|
| 456 | };
|
---|
| 457 |
|
---|
| 458 | int init_module(const char *name, const struct new_module *);
|
---|
| 459 | int query_module(const char *name, int which, void *buf,
|
---|
| 460 | size_t bufsize, size_t *ret);
|
---|
| 461 |
|
---|
| 462 | /* Values for query_module's which. */
|
---|
| 463 | enum {
|
---|
| 464 | QM_MODULES = 1,
|
---|
| 465 | QM_DEPS = 2,
|
---|
| 466 | QM_REFS = 3,
|
---|
| 467 | QM_SYMBOLS = 4,
|
---|
| 468 | QM_INFO = 5
|
---|
| 469 | };
|
---|
| 470 |
|
---|
| 471 | /*======================================================================*/
|
---|
| 472 | /* The system calls unchanged between 2.0 and 2.1. */
|
---|
| 473 |
|
---|
| 474 | unsigned long create_module(const char *, size_t);
|
---|
| 475 | int delete_module(const char *);
|
---|
| 476 |
|
---|
| 477 |
|
---|
| 478 | #endif /* module.h */
|
---|
| 479 |
|
---|
| 480 | //----------------------------------------------------------------------------
|
---|
| 481 | //--------end of modutils module.h
|
---|
| 482 | //----------------------------------------------------------------------------
|
---|
| 483 |
|
---|
| 484 |
|
---|
| 485 |
|
---|
| 486 | //----------------------------------------------------------------------------
|
---|
| 487 | //--------modutils obj.h, lines 253-462
|
---|
| 488 | //----------------------------------------------------------------------------
|
---|
| 489 |
|
---|
| 490 | /* Elf object file loading and relocation routines.
|
---|
| 491 | Copyright 1996, 1997 Linux International.
|
---|
| 492 |
|
---|
| 493 | Contributed by Richard Henderson <rth@tamu.edu>
|
---|
| 494 |
|
---|
| 495 | This file is part of the Linux modutils.
|
---|
| 496 |
|
---|
| 497 | This program is free software; you can redistribute it and/or modify it
|
---|
| 498 | under the terms of the GNU General Public License as published by the
|
---|
| 499 | Free Software Foundation; either version 2 of the License, or (at your
|
---|
| 500 | option) any later version.
|
---|
| 501 |
|
---|
| 502 | This program is distributed in the hope that it will be useful, but
|
---|
| 503 | WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 504 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
---|
| 505 | General Public License for more details.
|
---|
| 506 |
|
---|
| 507 | You should have received a copy of the GNU General Public License
|
---|
| 508 | along with this program; if not, write to the Free Software Foundation,
|
---|
| 509 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
---|
| 510 |
|
---|
| 511 |
|
---|
| 512 | #ifndef MODUTILS_OBJ_H
|
---|
| 513 | /* Why? static const int MODUTILS_OBJ_H = 1; */
|
---|
| 514 |
|
---|
| 515 | #ident "$Id: insmod.c,v 1.126 2004/12/26 09:13:32 vapier Exp $"
|
---|
| 516 |
|
---|
| 517 | /* The relocatable object is manipulated using elfin types. */
|
---|
| 518 |
|
---|
| 519 | #include <stdio.h>
|
---|
| 520 | #include <elf.h>
|
---|
| 521 | #include <endian.h>
|
---|
| 522 |
|
---|
| 523 | #ifndef ElfW
|
---|
| 524 | # if ELFCLASSM == ELFCLASS32
|
---|
| 525 | # define ElfW(x) Elf32_ ## x
|
---|
| 526 | # define ELFW(x) ELF32_ ## x
|
---|
| 527 | # else
|
---|
| 528 | # define ElfW(x) Elf64_ ## x
|
---|
| 529 | # define ELFW(x) ELF64_ ## x
|
---|
| 530 | # endif
|
---|
| 531 | #endif
|
---|
| 532 |
|
---|
| 533 | /* For some reason this is missing from some ancient C libraries.... */
|
---|
| 534 | #ifndef ELF32_ST_INFO
|
---|
| 535 | # define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
|
---|
| 536 | #endif
|
---|
| 537 |
|
---|
| 538 | #ifndef ELF64_ST_INFO
|
---|
| 539 | # define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
|
---|
| 540 | #endif
|
---|
| 541 |
|
---|
| 542 | #define ELF_ST_BIND(info) ELFW(ST_BIND)(info)
|
---|
| 543 | #define ELF_ST_TYPE(info) ELFW(ST_TYPE)(info)
|
---|
| 544 | #define ELF_ST_INFO(bind, type) ELFW(ST_INFO)(bind, type)
|
---|
| 545 | #define ELF_R_TYPE(val) ELFW(R_TYPE)(val)
|
---|
| 546 | #define ELF_R_SYM(val) ELFW(R_SYM)(val)
|
---|
| 547 |
|
---|
| 548 | struct obj_string_patch;
|
---|
| 549 | struct obj_symbol_patch;
|
---|
| 550 |
|
---|
| 551 | struct obj_section
|
---|
| 552 | {
|
---|
| 553 | ElfW(Shdr) header;
|
---|
| 554 | const char *name;
|
---|
| 555 | char *contents;
|
---|
| 556 | struct obj_section *load_next;
|
---|
| 557 | int idx;
|
---|
| 558 | };
|
---|
| 559 |
|
---|
| 560 | struct obj_symbol
|
---|
| 561 | {
|
---|
| 562 | struct obj_symbol *next; /* hash table link */
|
---|
| 563 | const char *name;
|
---|
| 564 | unsigned long value;
|
---|
| 565 | unsigned long size;
|
---|
| 566 | int secidx; /* the defining section index/module */
|
---|
| 567 | int info;
|
---|
| 568 | int ksymidx; /* for export to the kernel symtab */
|
---|
| 569 | int referenced; /* actually used in the link */
|
---|
| 570 | };
|
---|
| 571 |
|
---|
| 572 | /* Hardcode the hash table size. We shouldn't be needing so many
|
---|
| 573 | symbols that we begin to degrade performance, and we get a big win
|
---|
| 574 | by giving the compiler a constant divisor. */
|
---|
| 575 |
|
---|
| 576 | #define HASH_BUCKETS 521
|
---|
| 577 |
|
---|
| 578 | struct obj_file
|
---|
| 579 | {
|
---|
| 580 | ElfW(Ehdr) header;
|
---|
| 581 | ElfW(Addr) baseaddr;
|
---|
| 582 | struct obj_section **sections;
|
---|
| 583 | struct obj_section *load_order;
|
---|
| 584 | struct obj_section **load_order_search_start;
|
---|
| 585 | struct obj_string_patch *string_patches;
|
---|
| 586 | struct obj_symbol_patch *symbol_patches;
|
---|
| 587 | int (*symbol_cmp)(const char *, const char *);
|
---|
| 588 | unsigned long (*symbol_hash)(const char *);
|
---|
| 589 | unsigned long local_symtab_size;
|
---|
| 590 | struct obj_symbol **local_symtab;
|
---|
| 591 | struct obj_symbol *symtab[HASH_BUCKETS];
|
---|
| 592 | };
|
---|
| 593 |
|
---|
| 594 | enum obj_reloc
|
---|
| 595 | {
|
---|
| 596 | obj_reloc_ok,
|
---|
| 597 | obj_reloc_overflow,
|
---|
| 598 | obj_reloc_dangerous,
|
---|
| 599 | obj_reloc_unhandled
|
---|
| 600 | };
|
---|
| 601 |
|
---|
| 602 | struct obj_string_patch
|
---|
| 603 | {
|
---|
| 604 | struct obj_string_patch *next;
|
---|
| 605 | int reloc_secidx;
|
---|
| 606 | ElfW(Addr) reloc_offset;
|
---|
| 607 | ElfW(Addr) string_offset;
|
---|
| 608 | };
|
---|
| 609 |
|
---|
| 610 | struct obj_symbol_patch
|
---|
| 611 | {
|
---|
| 612 | struct obj_symbol_patch *next;
|
---|
| 613 | int reloc_secidx;
|
---|
| 614 | ElfW(Addr) reloc_offset;
|
---|
| 615 | struct obj_symbol *sym;
|
---|
| 616 | };
|
---|
| 617 |
|
---|
| 618 |
|
---|
| 619 | /* Generic object manipulation routines. */
|
---|
| 620 |
|
---|
| 621 | static unsigned long obj_elf_hash(const char *);
|
---|
| 622 |
|
---|
| 623 | static unsigned long obj_elf_hash_n(const char *, unsigned long len);
|
---|
| 624 |
|
---|
| 625 | static struct obj_symbol *obj_find_symbol (struct obj_file *f,
|
---|
| 626 | const char *name);
|
---|
| 627 |
|
---|
| 628 | static ElfW(Addr) obj_symbol_final_value(struct obj_file *f,
|
---|
| 629 | struct obj_symbol *sym);
|
---|
| 630 |
|
---|
| 631 | #ifdef CONFIG_FEATURE_INSMOD_VERSION_CHECKING
|
---|
| 632 | static void obj_set_symbol_compare(struct obj_file *f,
|
---|
| 633 | int (*cmp)(const char *, const char *),
|
---|
| 634 | unsigned long (*hash)(const char *));
|
---|
| 635 | #endif
|
---|
| 636 |
|
---|
| 637 | static struct obj_section *obj_find_section (struct obj_file *f,
|
---|
| 638 | const char *name);
|
---|
| 639 |
|
---|
| 640 | static void obj_insert_section_load_order (struct obj_file *f,
|
---|
| 641 | struct obj_section *sec);
|
---|
| 642 |
|
---|
| 643 | static struct obj_section *obj_create_alloced_section (struct obj_file *f,
|
---|
| 644 | const char *name,
|
---|
| 645 | unsigned long align,
|
---|
| 646 | unsigned long size);
|
---|
| 647 |
|
---|
| 648 | static struct obj_section *obj_create_alloced_section_first (struct obj_file *f,
|
---|
| 649 | const char *name,
|
---|
| 650 | unsigned long align,
|
---|
| 651 | unsigned long size);
|
---|
| 652 |
|
---|
| 653 | static void *obj_extend_section (struct obj_section *sec, unsigned long more);
|
---|
| 654 |
|
---|
| 655 | static int obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
|
---|
| 656 | const char *string);
|
---|
| 657 |
|
---|
| 658 | static int obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
|
---|
| 659 | struct obj_symbol *sym);
|
---|
| 660 |
|
---|
| 661 | static int obj_check_undefineds(struct obj_file *f);
|
---|
| 662 |
|
---|
| 663 | static void obj_allocate_commons(struct obj_file *f);
|
---|
| 664 |
|
---|
| 665 | static unsigned long obj_load_size (struct obj_file *f);
|
---|
| 666 |
|
---|
| 667 | static int obj_relocate (struct obj_file *f, ElfW(Addr) base);
|
---|
| 668 |
|
---|
| 669 | static struct obj_file *obj_load(FILE *f, int loadprogbits);
|
---|
| 670 |
|
---|
| 671 | static int obj_create_image (struct obj_file *f, char *image);
|
---|
| 672 |
|
---|
| 673 | /* Architecture specific manipulation routines. */
|
---|
| 674 |
|
---|
| 675 | static struct obj_file *arch_new_file (void);
|
---|
| 676 |
|
---|
| 677 | static struct obj_section *arch_new_section (void);
|
---|
| 678 |
|
---|
| 679 | static struct obj_symbol *arch_new_symbol (void);
|
---|
| 680 |
|
---|
| 681 | static enum obj_reloc arch_apply_relocation (struct obj_file *f,
|
---|
| 682 | struct obj_section *targsec,
|
---|
| 683 | struct obj_section *symsec,
|
---|
| 684 | struct obj_symbol *sym,
|
---|
| 685 | ElfW(RelM) *rel, ElfW(Addr) value);
|
---|
| 686 |
|
---|
| 687 | static void arch_create_got (struct obj_file *f);
|
---|
| 688 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
|
---|
| 689 | static int obj_gpl_license(struct obj_file *f, const char **license);
|
---|
| 690 | #endif /* ENABLE_FEATURE_CHECK_TAINTED_MODULE */
|
---|
| 691 | #endif /* obj.h */
|
---|
| 692 | //----------------------------------------------------------------------------
|
---|
| 693 | //--------end of modutils obj.h
|
---|
| 694 | //----------------------------------------------------------------------------
|
---|
| 695 |
|
---|
| 696 |
|
---|
| 697 | /* SPFX is always a string, so it can be concatenated to string constants. */
|
---|
| 698 | #ifdef SYMBOL_PREFIX
|
---|
| 699 | #define SPFX SYMBOL_PREFIX
|
---|
| 700 | #else
|
---|
| 701 | #define SPFX ""
|
---|
| 702 | #endif
|
---|
| 703 |
|
---|
| 704 |
|
---|
| 705 | #define _PATH_MODULES "/lib/modules"
|
---|
| 706 | enum { STRVERSIONLEN = 32 };
|
---|
| 707 |
|
---|
| 708 | /*======================================================================*/
|
---|
| 709 |
|
---|
| 710 | static int flag_force_load = 0;
|
---|
| 711 | static int flag_autoclean = 0;
|
---|
| 712 | static int flag_verbose = 0;
|
---|
| 713 | static int flag_quiet = 0;
|
---|
| 714 | static int flag_export = 1;
|
---|
| 715 |
|
---|
| 716 |
|
---|
| 717 | /*======================================================================*/
|
---|
| 718 |
|
---|
| 719 | #if defined(CONFIG_USE_LIST)
|
---|
| 720 |
|
---|
| 721 | struct arch_list_entry
|
---|
| 722 | {
|
---|
| 723 | struct arch_list_entry *next;
|
---|
| 724 | CONFIG_LIST_ARCHTYPE addend;
|
---|
| 725 | int offset;
|
---|
| 726 | int inited : 1;
|
---|
| 727 | };
|
---|
| 728 |
|
---|
| 729 | #endif
|
---|
| 730 |
|
---|
| 731 | #if defined(CONFIG_USE_SINGLE)
|
---|
| 732 |
|
---|
| 733 | struct arch_single_entry
|
---|
| 734 | {
|
---|
| 735 | int offset;
|
---|
| 736 | int inited : 1;
|
---|
| 737 | int allocated : 1;
|
---|
| 738 | };
|
---|
| 739 |
|
---|
| 740 | #endif
|
---|
| 741 |
|
---|
| 742 | #if defined(__mips__)
|
---|
| 743 | struct mips_hi16
|
---|
| 744 | {
|
---|
| 745 | struct mips_hi16 *next;
|
---|
| 746 | ElfW(Addr) *addr;
|
---|
| 747 | ElfW(Addr) value;
|
---|
| 748 | };
|
---|
| 749 | #endif
|
---|
| 750 |
|
---|
| 751 | struct arch_file {
|
---|
| 752 | struct obj_file root;
|
---|
| 753 | #if defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 754 | struct obj_section *plt;
|
---|
| 755 | #endif
|
---|
| 756 | #if defined(CONFIG_USE_GOT_ENTRIES)
|
---|
| 757 | struct obj_section *got;
|
---|
| 758 | #endif
|
---|
| 759 | #if defined(__mips__)
|
---|
| 760 | struct mips_hi16 *mips_hi16_list;
|
---|
| 761 | #endif
|
---|
| 762 | };
|
---|
| 763 |
|
---|
| 764 | struct arch_symbol {
|
---|
| 765 | struct obj_symbol root;
|
---|
| 766 | #if defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 767 | #if defined(CONFIG_USE_PLT_LIST)
|
---|
| 768 | struct arch_list_entry *pltent;
|
---|
| 769 | #else
|
---|
| 770 | struct arch_single_entry pltent;
|
---|
| 771 | #endif
|
---|
| 772 | #endif
|
---|
| 773 | #if defined(CONFIG_USE_GOT_ENTRIES)
|
---|
| 774 | struct arch_single_entry gotent;
|
---|
| 775 | #endif
|
---|
| 776 | };
|
---|
| 777 |
|
---|
| 778 |
|
---|
| 779 | struct external_module {
|
---|
| 780 | const char *name;
|
---|
| 781 | ElfW(Addr) addr;
|
---|
| 782 | int used;
|
---|
| 783 | size_t nsyms;
|
---|
| 784 | struct new_module_symbol *syms;
|
---|
| 785 | };
|
---|
| 786 |
|
---|
| 787 | static struct new_module_symbol *ksyms;
|
---|
| 788 | static size_t nksyms;
|
---|
| 789 |
|
---|
| 790 | static struct external_module *ext_modules;
|
---|
| 791 | static int n_ext_modules;
|
---|
| 792 | static int n_ext_modules_used;
|
---|
| 793 | extern int delete_module(const char *);
|
---|
| 794 |
|
---|
| 795 | static char *m_filename;
|
---|
| 796 | static char *m_fullName;
|
---|
| 797 |
|
---|
| 798 |
|
---|
| 799 |
|
---|
| 800 | /*======================================================================*/
|
---|
| 801 |
|
---|
| 802 |
|
---|
| 803 | static int check_module_name_match(const char *filename, struct stat *statbuf,
|
---|
| 804 | void *userdata)
|
---|
| 805 | {
|
---|
| 806 | char *fullname = (char *) userdata;
|
---|
| 807 |
|
---|
| 808 | if (fullname[0] == '\0')
|
---|
| 809 | return (FALSE);
|
---|
| 810 | else {
|
---|
| 811 | char *tmp, *tmp1 = bb_xstrdup(filename);
|
---|
| 812 | tmp = bb_get_last_path_component(tmp1);
|
---|
| 813 | if (strcmp(tmp, fullname) == 0) {
|
---|
| 814 | free(tmp1);
|
---|
| 815 | /* Stop searching if we find a match */
|
---|
| 816 | m_filename = bb_xstrdup(filename);
|
---|
| 817 | return (FALSE);
|
---|
| 818 | }
|
---|
| 819 | free(tmp1);
|
---|
| 820 | }
|
---|
| 821 | return (TRUE);
|
---|
| 822 | }
|
---|
| 823 |
|
---|
| 824 |
|
---|
| 825 | /*======================================================================*/
|
---|
| 826 |
|
---|
| 827 | static struct obj_file *arch_new_file(void)
|
---|
| 828 | {
|
---|
| 829 | struct arch_file *f;
|
---|
| 830 | f = xmalloc(sizeof(*f));
|
---|
| 831 |
|
---|
| 832 | memset(f, 0, sizeof(*f));
|
---|
| 833 |
|
---|
| 834 | return &f->root;
|
---|
| 835 | }
|
---|
| 836 |
|
---|
| 837 | static struct obj_section *arch_new_section(void)
|
---|
| 838 | {
|
---|
| 839 | return xmalloc(sizeof(struct obj_section));
|
---|
| 840 | }
|
---|
| 841 |
|
---|
| 842 | static struct obj_symbol *arch_new_symbol(void)
|
---|
| 843 | {
|
---|
| 844 | struct arch_symbol *sym;
|
---|
| 845 | sym = xmalloc(sizeof(*sym));
|
---|
| 846 |
|
---|
| 847 | memset(sym, 0, sizeof(*sym));
|
---|
| 848 |
|
---|
| 849 | return &sym->root;
|
---|
| 850 | }
|
---|
| 851 |
|
---|
| 852 | static enum obj_reloc
|
---|
| 853 | arch_apply_relocation(struct obj_file *f,
|
---|
| 854 | struct obj_section *targsec,
|
---|
| 855 | struct obj_section *symsec,
|
---|
| 856 | struct obj_symbol *sym,
|
---|
| 857 | ElfW(RelM) *rel, ElfW(Addr) v)
|
---|
| 858 | {
|
---|
| 859 | struct arch_file *ifile = (struct arch_file *) f;
|
---|
| 860 | enum obj_reloc ret = obj_reloc_ok;
|
---|
| 861 | ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset);
|
---|
| 862 | ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset;
|
---|
| 863 | #if defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 864 | struct arch_symbol *isym = (struct arch_symbol *) sym;
|
---|
| 865 | #endif
|
---|
| 866 | #if defined(__arm__) || defined(__i386__) || defined(__mc68000__) || defined(__sh__) || defined(__s390__)
|
---|
| 867 | #if defined(CONFIG_USE_GOT_ENTRIES)
|
---|
| 868 | ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0;
|
---|
| 869 | #endif
|
---|
| 870 | #endif
|
---|
| 871 | #if defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 872 | ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
|
---|
| 873 | unsigned long *ip;
|
---|
| 874 | # if defined(CONFIG_USE_PLT_LIST)
|
---|
| 875 | struct arch_list_entry *pe;
|
---|
| 876 | # else
|
---|
| 877 | struct arch_single_entry *pe;
|
---|
| 878 | # endif
|
---|
| 879 | #endif
|
---|
| 880 |
|
---|
| 881 | switch (ELF_R_TYPE(rel->r_info)) {
|
---|
| 882 |
|
---|
| 883 | #if defined(__arm__)
|
---|
| 884 |
|
---|
| 885 | case R_ARM_NONE:
|
---|
| 886 | break;
|
---|
| 887 |
|
---|
| 888 | case R_ARM_ABS32:
|
---|
| 889 | *loc += v;
|
---|
| 890 | break;
|
---|
| 891 |
|
---|
| 892 | case R_ARM_GOT32:
|
---|
| 893 | goto bb_use_got;
|
---|
| 894 |
|
---|
| 895 | case R_ARM_GOTPC:
|
---|
| 896 | /* relative reloc, always to _GLOBAL_OFFSET_TABLE_
|
---|
| 897 | * (which is .got) similar to branch,
|
---|
| 898 | * but is full 32 bits relative */
|
---|
| 899 |
|
---|
| 900 | assert(got != 0);
|
---|
| 901 | *loc += got - dot;
|
---|
| 902 | break;
|
---|
| 903 |
|
---|
| 904 | case R_ARM_PC24:
|
---|
| 905 | case R_ARM_PLT32:
|
---|
| 906 | goto bb_use_plt;
|
---|
| 907 |
|
---|
| 908 | case R_ARM_GOTOFF: /* address relative to the got */
|
---|
| 909 | assert(got != 0);
|
---|
| 910 | *loc += v - got;
|
---|
| 911 | break;
|
---|
| 912 |
|
---|
| 913 | #elif defined(__cris__)
|
---|
| 914 |
|
---|
| 915 | case R_CRIS_NONE:
|
---|
| 916 | break;
|
---|
| 917 |
|
---|
| 918 | case R_CRIS_32:
|
---|
| 919 | /* CRIS keeps the relocation value in the r_addend field and
|
---|
| 920 | * should not use whats in *loc at all
|
---|
| 921 | */
|
---|
| 922 | *loc = v;
|
---|
| 923 | break;
|
---|
| 924 |
|
---|
| 925 | #elif defined(__H8300H__) || defined(__H8300S__)
|
---|
| 926 |
|
---|
| 927 | case R_H8_DIR24R8:
|
---|
| 928 | loc = (ElfW(Addr) *)((ElfW(Addr))loc - 1);
|
---|
| 929 | *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v);
|
---|
| 930 | break;
|
---|
| 931 | case R_H8_DIR24A8:
|
---|
| 932 | *loc += v;
|
---|
| 933 | break;
|
---|
| 934 | case R_H8_DIR32:
|
---|
| 935 | case R_H8_DIR32A16:
|
---|
| 936 | *loc += v;
|
---|
| 937 | break;
|
---|
| 938 | case R_H8_PCREL16:
|
---|
| 939 | v -= dot + 2;
|
---|
| 940 | if ((ElfW(Sword))v > 0x7fff ||
|
---|
| 941 | (ElfW(Sword))v < -(ElfW(Sword))0x8000)
|
---|
| 942 | ret = obj_reloc_overflow;
|
---|
| 943 | else
|
---|
| 944 | *(unsigned short *)loc = v;
|
---|
| 945 | break;
|
---|
| 946 | case R_H8_PCREL8:
|
---|
| 947 | v -= dot + 1;
|
---|
| 948 | if ((ElfW(Sword))v > 0x7f ||
|
---|
| 949 | (ElfW(Sword))v < -(ElfW(Sword))0x80)
|
---|
| 950 | ret = obj_reloc_overflow;
|
---|
| 951 | else
|
---|
| 952 | *(unsigned char *)loc = v;
|
---|
| 953 | break;
|
---|
| 954 |
|
---|
| 955 | #elif defined(__i386__)
|
---|
| 956 |
|
---|
| 957 | case R_386_NONE:
|
---|
| 958 | break;
|
---|
| 959 |
|
---|
| 960 | case R_386_32:
|
---|
| 961 | *loc += v;
|
---|
| 962 | break;
|
---|
| 963 |
|
---|
| 964 | case R_386_PLT32:
|
---|
| 965 | case R_386_PC32:
|
---|
| 966 | *loc += v - dot;
|
---|
| 967 | break;
|
---|
| 968 |
|
---|
| 969 | case R_386_GLOB_DAT:
|
---|
| 970 | case R_386_JMP_SLOT:
|
---|
| 971 | *loc = v;
|
---|
| 972 | break;
|
---|
| 973 |
|
---|
| 974 | case R_386_RELATIVE:
|
---|
| 975 | *loc += f->baseaddr;
|
---|
| 976 | break;
|
---|
| 977 |
|
---|
| 978 | case R_386_GOTPC:
|
---|
| 979 | assert(got != 0);
|
---|
| 980 | *loc += got - dot;
|
---|
| 981 | break;
|
---|
| 982 |
|
---|
| 983 | case R_386_GOT32:
|
---|
| 984 | goto bb_use_got;
|
---|
| 985 |
|
---|
| 986 | case R_386_GOTOFF:
|
---|
| 987 | assert(got != 0);
|
---|
| 988 | *loc += v - got;
|
---|
| 989 | break;
|
---|
| 990 |
|
---|
| 991 | #elif defined (__microblaze__)
|
---|
| 992 | case R_MICROBLAZE_NONE:
|
---|
| 993 | case R_MICROBLAZE_64_NONE:
|
---|
| 994 | case R_MICROBLAZE_32_SYM_OP_SYM:
|
---|
| 995 | case R_MICROBLAZE_32_PCREL:
|
---|
| 996 | break;
|
---|
| 997 |
|
---|
| 998 | case R_MICROBLAZE_64_PCREL: {
|
---|
| 999 | /* dot is the address of the current instruction.
|
---|
| 1000 | * v is the target symbol address.
|
---|
| 1001 | * So we need to extract the offset in the code,
|
---|
| 1002 | * adding v, then subtrating the current address
|
---|
| 1003 | * of this instruction.
|
---|
| 1004 | * Ex: "IMM 0xFFFE bralid 0x0000" = "bralid 0xFFFE0000"
|
---|
| 1005 | */
|
---|
| 1006 |
|
---|
| 1007 | /* Get split offset stored in code */
|
---|
| 1008 | unsigned int temp = (loc[0] & 0xFFFF) << 16 |
|
---|
| 1009 | (loc[1] & 0xFFFF);
|
---|
| 1010 |
|
---|
| 1011 | /* Adjust relative offset. -4 adjustment required
|
---|
| 1012 | * because dot points to the IMM insn, but branch
|
---|
| 1013 | * is computed relative to the branch instruction itself.
|
---|
| 1014 | */
|
---|
| 1015 | temp += v - dot - 4;
|
---|
| 1016 |
|
---|
| 1017 | /* Store back into code */
|
---|
| 1018 | loc[0] = (loc[0] & 0xFFFF0000) | temp >> 16;
|
---|
| 1019 | loc[1] = (loc[1] & 0xFFFF0000) | (temp & 0xFFFF);
|
---|
| 1020 |
|
---|
| 1021 | break;
|
---|
| 1022 | }
|
---|
| 1023 |
|
---|
| 1024 | case R_MICROBLAZE_32:
|
---|
| 1025 | *loc += v;
|
---|
| 1026 | break;
|
---|
| 1027 |
|
---|
| 1028 | case R_MICROBLAZE_64: {
|
---|
| 1029 | /* Get split pointer stored in code */
|
---|
| 1030 | unsigned int temp1 = (loc[0] & 0xFFFF) << 16 |
|
---|
| 1031 | (loc[1] & 0xFFFF);
|
---|
| 1032 |
|
---|
| 1033 | /* Add reloc offset */
|
---|
| 1034 | temp1+=v;
|
---|
| 1035 |
|
---|
| 1036 | /* Store back into code */
|
---|
| 1037 | loc[0] = (loc[0] & 0xFFFF0000) | temp1 >> 16;
|
---|
| 1038 | loc[1] = (loc[1] & 0xFFFF0000) | (temp1 & 0xFFFF);
|
---|
| 1039 |
|
---|
| 1040 | break;
|
---|
| 1041 | }
|
---|
| 1042 |
|
---|
| 1043 | case R_MICROBLAZE_32_PCREL_LO:
|
---|
| 1044 | case R_MICROBLAZE_32_LO:
|
---|
| 1045 | case R_MICROBLAZE_SRO32:
|
---|
| 1046 | case R_MICROBLAZE_SRW32:
|
---|
| 1047 | ret = obj_reloc_unhandled;
|
---|
| 1048 | break;
|
---|
| 1049 |
|
---|
| 1050 | #elif defined(__mc68000__)
|
---|
| 1051 |
|
---|
| 1052 | case R_68K_NONE:
|
---|
| 1053 | break;
|
---|
| 1054 |
|
---|
| 1055 | case R_68K_32:
|
---|
| 1056 | *loc += v;
|
---|
| 1057 | break;
|
---|
| 1058 |
|
---|
| 1059 | case R_68K_8:
|
---|
| 1060 | if (v > 0xff) {
|
---|
| 1061 | ret = obj_reloc_overflow;
|
---|
| 1062 | }
|
---|
| 1063 | *(char *)loc = v;
|
---|
| 1064 | break;
|
---|
| 1065 |
|
---|
| 1066 | case R_68K_16:
|
---|
| 1067 | if (v > 0xffff) {
|
---|
| 1068 | ret = obj_reloc_overflow;
|
---|
| 1069 | }
|
---|
| 1070 | *(short *)loc = v;
|
---|
| 1071 | break;
|
---|
| 1072 |
|
---|
| 1073 | case R_68K_PC8:
|
---|
| 1074 | v -= dot;
|
---|
| 1075 | if ((ElfW(Sword))v > 0x7f ||
|
---|
| 1076 | (ElfW(Sword))v < -(ElfW(Sword))0x80) {
|
---|
| 1077 | ret = obj_reloc_overflow;
|
---|
| 1078 | }
|
---|
| 1079 | *(char *)loc = v;
|
---|
| 1080 | break;
|
---|
| 1081 |
|
---|
| 1082 | case R_68K_PC16:
|
---|
| 1083 | v -= dot;
|
---|
| 1084 | if ((ElfW(Sword))v > 0x7fff ||
|
---|
| 1085 | (ElfW(Sword))v < -(ElfW(Sword))0x8000) {
|
---|
| 1086 | ret = obj_reloc_overflow;
|
---|
| 1087 | }
|
---|
| 1088 | *(short *)loc = v;
|
---|
| 1089 | break;
|
---|
| 1090 |
|
---|
| 1091 | case R_68K_PC32:
|
---|
| 1092 | *(int *)loc = v - dot;
|
---|
| 1093 | break;
|
---|
| 1094 |
|
---|
| 1095 | case R_68K_GLOB_DAT:
|
---|
| 1096 | case R_68K_JMP_SLOT:
|
---|
| 1097 | *loc = v;
|
---|
| 1098 | break;
|
---|
| 1099 |
|
---|
| 1100 | case R_68K_RELATIVE:
|
---|
| 1101 | *(int *)loc += f->baseaddr;
|
---|
| 1102 | break;
|
---|
| 1103 |
|
---|
| 1104 | case R_68K_GOT32:
|
---|
| 1105 | goto bb_use_got;
|
---|
| 1106 |
|
---|
| 1107 | # ifdef R_68K_GOTOFF
|
---|
| 1108 | case R_68K_GOTOFF:
|
---|
| 1109 | assert(got != 0);
|
---|
| 1110 | *loc += v - got;
|
---|
| 1111 | break;
|
---|
| 1112 | # endif
|
---|
| 1113 |
|
---|
| 1114 | #elif defined(__mips__)
|
---|
| 1115 |
|
---|
| 1116 | case R_MIPS_NONE:
|
---|
| 1117 | break;
|
---|
| 1118 |
|
---|
| 1119 | case R_MIPS_32:
|
---|
| 1120 | *loc += v;
|
---|
| 1121 | break;
|
---|
| 1122 |
|
---|
| 1123 | case R_MIPS_26:
|
---|
| 1124 | if (v % 4)
|
---|
| 1125 | ret = obj_reloc_dangerous;
|
---|
| 1126 | if ((v & 0xf0000000) != ((dot + 4) & 0xf0000000))
|
---|
| 1127 | ret = obj_reloc_overflow;
|
---|
| 1128 | *loc =
|
---|
| 1129 | (*loc & ~0x03ffffff) | ((*loc + (v >> 2)) &
|
---|
| 1130 | 0x03ffffff);
|
---|
| 1131 | break;
|
---|
| 1132 |
|
---|
| 1133 | case R_MIPS_HI16:
|
---|
| 1134 | {
|
---|
| 1135 | struct mips_hi16 *n;
|
---|
| 1136 |
|
---|
| 1137 | /* We cannot relocate this one now because we don't know the value
|
---|
| 1138 | of the carry we need to add. Save the information, and let LO16
|
---|
| 1139 | do the actual relocation. */
|
---|
| 1140 | n = (struct mips_hi16 *) xmalloc(sizeof *n);
|
---|
| 1141 | n->addr = loc;
|
---|
| 1142 | n->value = v;
|
---|
| 1143 | n->next = ifile->mips_hi16_list;
|
---|
| 1144 | ifile->mips_hi16_list = n;
|
---|
| 1145 | break;
|
---|
| 1146 | }
|
---|
| 1147 |
|
---|
| 1148 | case R_MIPS_LO16:
|
---|
| 1149 | {
|
---|
| 1150 | unsigned long insnlo = *loc;
|
---|
| 1151 | ElfW(Addr) val, vallo;
|
---|
| 1152 |
|
---|
| 1153 | /* Sign extend the addend we extract from the lo insn. */
|
---|
| 1154 | vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000;
|
---|
| 1155 |
|
---|
| 1156 | if (ifile->mips_hi16_list != NULL) {
|
---|
| 1157 | struct mips_hi16 *l;
|
---|
| 1158 |
|
---|
| 1159 | l = ifile->mips_hi16_list;
|
---|
| 1160 | while (l != NULL) {
|
---|
| 1161 | struct mips_hi16 *next;
|
---|
| 1162 | unsigned long insn;
|
---|
| 1163 |
|
---|
| 1164 | /* The value for the HI16 had best be the same. */
|
---|
| 1165 | assert(v == l->value);
|
---|
| 1166 |
|
---|
| 1167 | /* Do the HI16 relocation. Note that we actually don't
|
---|
| 1168 | need to know anything about the LO16 itself, except where
|
---|
| 1169 | to find the low 16 bits of the addend needed by the LO16. */
|
---|
| 1170 | insn = *l->addr;
|
---|
| 1171 | val =
|
---|
| 1172 | ((insn & 0xffff) << 16) +
|
---|
| 1173 | vallo;
|
---|
| 1174 | val += v;
|
---|
| 1175 |
|
---|
| 1176 | /* Account for the sign extension that will happen in the
|
---|
| 1177 | low bits. */
|
---|
| 1178 | val =
|
---|
| 1179 | ((val >> 16) +
|
---|
| 1180 | ((val & 0x8000) !=
|
---|
| 1181 | 0)) & 0xffff;
|
---|
| 1182 |
|
---|
| 1183 | insn = (insn & ~0xffff) | val;
|
---|
| 1184 | *l->addr = insn;
|
---|
| 1185 |
|
---|
| 1186 | next = l->next;
|
---|
| 1187 | free(l);
|
---|
| 1188 | l = next;
|
---|
| 1189 | }
|
---|
| 1190 |
|
---|
| 1191 | ifile->mips_hi16_list = NULL;
|
---|
| 1192 | }
|
---|
| 1193 |
|
---|
| 1194 | /* Ok, we're done with the HI16 relocs. Now deal with the LO16. */
|
---|
| 1195 | val = v + vallo;
|
---|
| 1196 | insnlo = (insnlo & ~0xffff) | (val & 0xffff);
|
---|
| 1197 | *loc = insnlo;
|
---|
| 1198 | break;
|
---|
| 1199 | }
|
---|
| 1200 |
|
---|
| 1201 | #elif defined(__nios2__)
|
---|
| 1202 |
|
---|
| 1203 | case R_NIOS2_NONE:
|
---|
| 1204 | break;
|
---|
| 1205 |
|
---|
| 1206 | case R_NIOS2_BFD_RELOC_32:
|
---|
| 1207 | *loc += v;
|
---|
| 1208 | break;
|
---|
| 1209 |
|
---|
| 1210 | case R_NIOS2_BFD_RELOC_16:
|
---|
| 1211 | if (v > 0xffff) {
|
---|
| 1212 | ret = obj_reloc_overflow;
|
---|
| 1213 | }
|
---|
| 1214 | *(short *)loc = v;
|
---|
| 1215 | break;
|
---|
| 1216 |
|
---|
| 1217 | case R_NIOS2_BFD_RELOC_8:
|
---|
| 1218 | if (v > 0xff) {
|
---|
| 1219 | ret = obj_reloc_overflow;
|
---|
| 1220 | }
|
---|
| 1221 | *(char *)loc = v;
|
---|
| 1222 | break;
|
---|
| 1223 |
|
---|
| 1224 | case R_NIOS2_S16:
|
---|
| 1225 | {
|
---|
| 1226 | Elf32_Addr word;
|
---|
| 1227 |
|
---|
| 1228 | if ((Elf32_Sword)v > 0x7fff ||
|
---|
| 1229 | (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
|
---|
| 1230 | ret = obj_reloc_overflow;
|
---|
| 1231 | }
|
---|
| 1232 |
|
---|
| 1233 | word = *loc;
|
---|
| 1234 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
|
---|
| 1235 | (word & 0x3f);
|
---|
| 1236 | }
|
---|
| 1237 | break;
|
---|
| 1238 |
|
---|
| 1239 | case R_NIOS2_U16:
|
---|
| 1240 | {
|
---|
| 1241 | Elf32_Addr word;
|
---|
| 1242 |
|
---|
| 1243 | if (v > 0xffff) {
|
---|
| 1244 | ret = obj_reloc_overflow;
|
---|
| 1245 | }
|
---|
| 1246 |
|
---|
| 1247 | word = *loc;
|
---|
| 1248 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
|
---|
| 1249 | (word & 0x3f);
|
---|
| 1250 | }
|
---|
| 1251 | break;
|
---|
| 1252 |
|
---|
| 1253 | case R_NIOS2_PCREL16:
|
---|
| 1254 | {
|
---|
| 1255 | Elf32_Addr word;
|
---|
| 1256 |
|
---|
| 1257 | v -= dot + 4;
|
---|
| 1258 | if ((Elf32_Sword)v > 0x7fff ||
|
---|
| 1259 | (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
|
---|
| 1260 | ret = obj_reloc_overflow;
|
---|
| 1261 | }
|
---|
| 1262 |
|
---|
| 1263 | word = *loc;
|
---|
| 1264 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
|
---|
| 1265 | }
|
---|
| 1266 | break;
|
---|
| 1267 |
|
---|
| 1268 | case R_NIOS2_GPREL:
|
---|
| 1269 | {
|
---|
| 1270 | Elf32_Addr word, gp;
|
---|
| 1271 | /* get _gp */
|
---|
| 1272 | gp = obj_symbol_final_value(f, obj_find_symbol(f, SPFX "_gp"));
|
---|
| 1273 | v-=gp;
|
---|
| 1274 | if ((Elf32_Sword)v > 0x7fff ||
|
---|
| 1275 | (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
|
---|
| 1276 | ret = obj_reloc_overflow;
|
---|
| 1277 | }
|
---|
| 1278 |
|
---|
| 1279 | word = *loc;
|
---|
| 1280 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) | (word & 0x3f);
|
---|
| 1281 | }
|
---|
| 1282 | break;
|
---|
| 1283 |
|
---|
| 1284 | case R_NIOS2_CALL26:
|
---|
| 1285 | if (v & 3)
|
---|
| 1286 | ret = obj_reloc_dangerous;
|
---|
| 1287 | if ((v >> 28) != (dot >> 28))
|
---|
| 1288 | ret = obj_reloc_overflow;
|
---|
| 1289 | *loc = (*loc & 0x3f) | ((v >> 2) << 6);
|
---|
| 1290 | break;
|
---|
| 1291 |
|
---|
| 1292 | case R_NIOS2_IMM5:
|
---|
| 1293 | {
|
---|
| 1294 | Elf32_Addr word;
|
---|
| 1295 |
|
---|
| 1296 | if (v > 0x1f) {
|
---|
| 1297 | ret = obj_reloc_overflow;
|
---|
| 1298 | }
|
---|
| 1299 |
|
---|
| 1300 | word = *loc & ~0x7c0;
|
---|
| 1301 | *loc = word | ((v & 0x1f) << 6);
|
---|
| 1302 | }
|
---|
| 1303 | break;
|
---|
| 1304 |
|
---|
| 1305 | case R_NIOS2_IMM6:
|
---|
| 1306 | {
|
---|
| 1307 | Elf32_Addr word;
|
---|
| 1308 |
|
---|
| 1309 | if (v > 0x3f) {
|
---|
| 1310 | ret = obj_reloc_overflow;
|
---|
| 1311 | }
|
---|
| 1312 |
|
---|
| 1313 | word = *loc & ~0xfc0;
|
---|
| 1314 | *loc = word | ((v & 0x3f) << 6);
|
---|
| 1315 | }
|
---|
| 1316 | break;
|
---|
| 1317 |
|
---|
| 1318 | case R_NIOS2_IMM8:
|
---|
| 1319 | {
|
---|
| 1320 | Elf32_Addr word;
|
---|
| 1321 |
|
---|
| 1322 | if (v > 0xff) {
|
---|
| 1323 | ret = obj_reloc_overflow;
|
---|
| 1324 | }
|
---|
| 1325 |
|
---|
| 1326 | word = *loc & ~0x3fc0;
|
---|
| 1327 | *loc = word | ((v & 0xff) << 6);
|
---|
| 1328 | }
|
---|
| 1329 | break;
|
---|
| 1330 |
|
---|
| 1331 | case R_NIOS2_HI16:
|
---|
| 1332 | {
|
---|
| 1333 | Elf32_Addr word;
|
---|
| 1334 |
|
---|
| 1335 | word = *loc;
|
---|
| 1336 | *loc = ((((word >> 22) << 16) | ((v >>16) & 0xffff)) << 6) |
|
---|
| 1337 | (word & 0x3f);
|
---|
| 1338 | }
|
---|
| 1339 | break;
|
---|
| 1340 |
|
---|
| 1341 | case R_NIOS2_LO16:
|
---|
| 1342 | {
|
---|
| 1343 | Elf32_Addr word;
|
---|
| 1344 |
|
---|
| 1345 | word = *loc;
|
---|
| 1346 | *loc = ((((word >> 22) << 16) | (v & 0xffff)) << 6) |
|
---|
| 1347 | (word & 0x3f);
|
---|
| 1348 | }
|
---|
| 1349 | break;
|
---|
| 1350 |
|
---|
| 1351 | case R_NIOS2_HIADJ16:
|
---|
| 1352 | {
|
---|
| 1353 | Elf32_Addr word1, word2;
|
---|
| 1354 |
|
---|
| 1355 | word1 = *loc;
|
---|
| 1356 | word2 = ((v >> 16) + ((v >> 15) & 1)) & 0xffff;
|
---|
| 1357 | *loc = ((((word1 >> 22) << 16) | word2) << 6) |
|
---|
| 1358 | (word1 & 0x3f);
|
---|
| 1359 | }
|
---|
| 1360 | break;
|
---|
| 1361 |
|
---|
| 1362 | #elif defined(__powerpc64__)
|
---|
| 1363 | /* PPC64 needs a 2.6 kernel, 2.4 module relocation irrelevant */
|
---|
| 1364 |
|
---|
| 1365 | #elif defined(__powerpc__)
|
---|
| 1366 |
|
---|
| 1367 | case R_PPC_ADDR16_HA:
|
---|
| 1368 | *(unsigned short *)loc = (v + 0x8000) >> 16;
|
---|
| 1369 | break;
|
---|
| 1370 |
|
---|
| 1371 | case R_PPC_ADDR16_HI:
|
---|
| 1372 | *(unsigned short *)loc = v >> 16;
|
---|
| 1373 | break;
|
---|
| 1374 |
|
---|
| 1375 | case R_PPC_ADDR16_LO:
|
---|
| 1376 | *(unsigned short *)loc = v;
|
---|
| 1377 | break;
|
---|
| 1378 |
|
---|
| 1379 | case R_PPC_REL24:
|
---|
| 1380 | goto bb_use_plt;
|
---|
| 1381 |
|
---|
| 1382 | case R_PPC_REL32:
|
---|
| 1383 | *loc = v - dot;
|
---|
| 1384 | break;
|
---|
| 1385 |
|
---|
| 1386 | case R_PPC_ADDR32:
|
---|
| 1387 | *loc = v;
|
---|
| 1388 | break;
|
---|
| 1389 |
|
---|
| 1390 | #elif defined(__s390__)
|
---|
| 1391 |
|
---|
| 1392 | case R_390_32:
|
---|
| 1393 | *(unsigned int *) loc += v;
|
---|
| 1394 | break;
|
---|
| 1395 | case R_390_16:
|
---|
| 1396 | *(unsigned short *) loc += v;
|
---|
| 1397 | break;
|
---|
| 1398 | case R_390_8:
|
---|
| 1399 | *(unsigned char *) loc += v;
|
---|
| 1400 | break;
|
---|
| 1401 |
|
---|
| 1402 | case R_390_PC32:
|
---|
| 1403 | *(unsigned int *) loc += v - dot;
|
---|
| 1404 | break;
|
---|
| 1405 | case R_390_PC16DBL:
|
---|
| 1406 | *(unsigned short *) loc += (v - dot) >> 1;
|
---|
| 1407 | break;
|
---|
| 1408 | case R_390_PC16:
|
---|
| 1409 | *(unsigned short *) loc += v - dot;
|
---|
| 1410 | break;
|
---|
| 1411 |
|
---|
| 1412 | case R_390_PLT32:
|
---|
| 1413 | case R_390_PLT16DBL:
|
---|
| 1414 | /* find the plt entry and initialize it. */
|
---|
| 1415 | assert(isym != NULL);
|
---|
| 1416 | pe = (struct arch_single_entry *) &isym->pltent;
|
---|
| 1417 | assert(pe->allocated);
|
---|
| 1418 | if (pe->inited == 0) {
|
---|
| 1419 | ip = (unsigned long *)(ifile->plt->contents + pe->offset);
|
---|
| 1420 | ip[0] = 0x0d105810; /* basr 1,0; lg 1,10(1); br 1 */
|
---|
| 1421 | ip[1] = 0x100607f1;
|
---|
| 1422 | if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
|
---|
| 1423 | ip[2] = v - 2;
|
---|
| 1424 | else
|
---|
| 1425 | ip[2] = v;
|
---|
| 1426 | pe->inited = 1;
|
---|
| 1427 | }
|
---|
| 1428 |
|
---|
| 1429 | /* Insert relative distance to target. */
|
---|
| 1430 | v = plt + pe->offset - dot;
|
---|
| 1431 | if (ELF_R_TYPE(rel->r_info) == R_390_PLT32)
|
---|
| 1432 | *(unsigned int *) loc = (unsigned int) v;
|
---|
| 1433 | else if (ELF_R_TYPE(rel->r_info) == R_390_PLT16DBL)
|
---|
| 1434 | *(unsigned short *) loc = (unsigned short) ((v + 2) >> 1);
|
---|
| 1435 | break;
|
---|
| 1436 |
|
---|
| 1437 | case R_390_GLOB_DAT:
|
---|
| 1438 | case R_390_JMP_SLOT:
|
---|
| 1439 | *loc = v;
|
---|
| 1440 | break;
|
---|
| 1441 |
|
---|
| 1442 | case R_390_RELATIVE:
|
---|
| 1443 | *loc += f->baseaddr;
|
---|
| 1444 | break;
|
---|
| 1445 |
|
---|
| 1446 | case R_390_GOTPC:
|
---|
| 1447 | assert(got != 0);
|
---|
| 1448 | *(unsigned long *) loc += got - dot;
|
---|
| 1449 | break;
|
---|
| 1450 |
|
---|
| 1451 | case R_390_GOT12:
|
---|
| 1452 | case R_390_GOT16:
|
---|
| 1453 | case R_390_GOT32:
|
---|
| 1454 | assert(isym != NULL);
|
---|
| 1455 | assert(got != 0);
|
---|
| 1456 | if (!isym->gotent.inited)
|
---|
| 1457 | {
|
---|
| 1458 | isym->gotent.inited = 1;
|
---|
| 1459 | *(ElfW(Addr) *)(ifile->got->contents + isym->gotent.offset) = v;
|
---|
| 1460 | }
|
---|
| 1461 | if (ELF_R_TYPE(rel->r_info) == R_390_GOT12)
|
---|
| 1462 | *(unsigned short *) loc |= (*(unsigned short *) loc + isym->gotent.offset) & 0xfff;
|
---|
| 1463 | else if (ELF_R_TYPE(rel->r_info) == R_390_GOT16)
|
---|
| 1464 | *(unsigned short *) loc += isym->gotent.offset;
|
---|
| 1465 | else if (ELF_R_TYPE(rel->r_info) == R_390_GOT32)
|
---|
| 1466 | *(unsigned int *) loc += isym->gotent.offset;
|
---|
| 1467 | break;
|
---|
| 1468 |
|
---|
| 1469 | # ifndef R_390_GOTOFF32
|
---|
| 1470 | # define R_390_GOTOFF32 R_390_GOTOFF
|
---|
| 1471 | # endif
|
---|
| 1472 | case R_390_GOTOFF32:
|
---|
| 1473 | assert(got != 0);
|
---|
| 1474 | *loc += v - got;
|
---|
| 1475 | break;
|
---|
| 1476 |
|
---|
| 1477 | #elif defined(__sh__)
|
---|
| 1478 |
|
---|
| 1479 | case R_SH_NONE:
|
---|
| 1480 | break;
|
---|
| 1481 |
|
---|
| 1482 | case R_SH_DIR32:
|
---|
| 1483 | *loc += v;
|
---|
| 1484 | break;
|
---|
| 1485 |
|
---|
| 1486 | case R_SH_REL32:
|
---|
| 1487 | *loc += v - dot;
|
---|
| 1488 | break;
|
---|
| 1489 |
|
---|
| 1490 | case R_SH_PLT32:
|
---|
| 1491 | *loc = v - dot;
|
---|
| 1492 | break;
|
---|
| 1493 |
|
---|
| 1494 | case R_SH_GLOB_DAT:
|
---|
| 1495 | case R_SH_JMP_SLOT:
|
---|
| 1496 | *loc = v;
|
---|
| 1497 | break;
|
---|
| 1498 |
|
---|
| 1499 | case R_SH_RELATIVE:
|
---|
| 1500 | *loc = f->baseaddr + rel->r_addend;
|
---|
| 1501 | break;
|
---|
| 1502 |
|
---|
| 1503 | case R_SH_GOTPC:
|
---|
| 1504 | assert(got != 0);
|
---|
| 1505 | *loc = got - dot + rel->r_addend;
|
---|
| 1506 | break;
|
---|
| 1507 |
|
---|
| 1508 | case R_SH_GOT32:
|
---|
| 1509 | goto bb_use_got;
|
---|
| 1510 |
|
---|
| 1511 | case R_SH_GOTOFF:
|
---|
| 1512 | assert(got != 0);
|
---|
| 1513 | *loc = v - got;
|
---|
| 1514 | break;
|
---|
| 1515 |
|
---|
| 1516 | # if defined(__SH5__)
|
---|
| 1517 | case R_SH_IMM_MEDLOW16:
|
---|
| 1518 | case R_SH_IMM_LOW16:
|
---|
| 1519 | {
|
---|
| 1520 | ElfW(Addr) word;
|
---|
| 1521 |
|
---|
| 1522 | if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16)
|
---|
| 1523 | v >>= 16;
|
---|
| 1524 |
|
---|
| 1525 | /*
|
---|
| 1526 | * movi and shori have the format:
|
---|
| 1527 | *
|
---|
| 1528 | * | op | imm | reg | reserved |
|
---|
| 1529 | * 31..26 25..10 9.. 4 3 .. 0
|
---|
| 1530 | *
|
---|
| 1531 | * so we simply mask and or in imm.
|
---|
| 1532 | */
|
---|
| 1533 | word = *loc & ~0x3fffc00;
|
---|
| 1534 | word |= (v & 0xffff) << 10;
|
---|
| 1535 |
|
---|
| 1536 | *loc = word;
|
---|
| 1537 |
|
---|
| 1538 | break;
|
---|
| 1539 | }
|
---|
| 1540 |
|
---|
| 1541 | case R_SH_IMM_MEDLOW16_PCREL:
|
---|
| 1542 | case R_SH_IMM_LOW16_PCREL:
|
---|
| 1543 | {
|
---|
| 1544 | ElfW(Addr) word;
|
---|
| 1545 |
|
---|
| 1546 | word = *loc & ~0x3fffc00;
|
---|
| 1547 |
|
---|
| 1548 | v -= dot;
|
---|
| 1549 |
|
---|
| 1550 | if (ELF_R_TYPE(rel->r_info) == R_SH_IMM_MEDLOW16_PCREL)
|
---|
| 1551 | v >>= 16;
|
---|
| 1552 |
|
---|
| 1553 | word |= (v & 0xffff) << 10;
|
---|
| 1554 |
|
---|
| 1555 | *loc = word;
|
---|
| 1556 |
|
---|
| 1557 | break;
|
---|
| 1558 | }
|
---|
| 1559 | # endif /* __SH5__ */
|
---|
| 1560 |
|
---|
| 1561 | #elif defined (__v850e__)
|
---|
| 1562 |
|
---|
| 1563 | case R_V850_NONE:
|
---|
| 1564 | break;
|
---|
| 1565 |
|
---|
| 1566 | case R_V850_32:
|
---|
| 1567 | /* We write two shorts instead of a long because even
|
---|
| 1568 | 32-bit insns only need half-word alignment, but
|
---|
| 1569 | 32-bit data needs to be long-word aligned. */
|
---|
| 1570 | v += ((unsigned short *)loc)[0];
|
---|
| 1571 | v += ((unsigned short *)loc)[1] << 16;
|
---|
| 1572 | ((unsigned short *)loc)[0] = v & 0xffff;
|
---|
| 1573 | ((unsigned short *)loc)[1] = (v >> 16) & 0xffff;
|
---|
| 1574 | break;
|
---|
| 1575 |
|
---|
| 1576 | case R_V850_22_PCREL:
|
---|
| 1577 | goto bb_use_plt;
|
---|
| 1578 |
|
---|
| 1579 | #elif defined(__x86_64__)
|
---|
| 1580 |
|
---|
| 1581 | case R_X86_64_NONE:
|
---|
| 1582 | break;
|
---|
| 1583 |
|
---|
| 1584 | case R_X86_64_64:
|
---|
| 1585 | *loc += v;
|
---|
| 1586 | break;
|
---|
| 1587 |
|
---|
| 1588 | case R_X86_64_32:
|
---|
| 1589 | *(unsigned int *) loc += v;
|
---|
| 1590 | if (v > 0xffffffff)
|
---|
| 1591 | {
|
---|
| 1592 | ret = obj_reloc_overflow; /* Kernel module compiled without -mcmodel=kernel. */
|
---|
| 1593 | /* error("Possibly is module compiled without -mcmodel=kernel!"); */
|
---|
| 1594 | }
|
---|
| 1595 | break;
|
---|
| 1596 |
|
---|
| 1597 | case R_X86_64_32S:
|
---|
| 1598 | *(signed int *) loc += v;
|
---|
| 1599 | break;
|
---|
| 1600 |
|
---|
| 1601 | case R_X86_64_16:
|
---|
| 1602 | *(unsigned short *) loc += v;
|
---|
| 1603 | break;
|
---|
| 1604 |
|
---|
| 1605 | case R_X86_64_8:
|
---|
| 1606 | *(unsigned char *) loc += v;
|
---|
| 1607 | break;
|
---|
| 1608 |
|
---|
| 1609 | case R_X86_64_PC32:
|
---|
| 1610 | *(unsigned int *) loc += v - dot;
|
---|
| 1611 | break;
|
---|
| 1612 |
|
---|
| 1613 | case R_X86_64_PC16:
|
---|
| 1614 | *(unsigned short *) loc += v - dot;
|
---|
| 1615 | break;
|
---|
| 1616 |
|
---|
| 1617 | case R_X86_64_PC8:
|
---|
| 1618 | *(unsigned char *) loc += v - dot;
|
---|
| 1619 | break;
|
---|
| 1620 |
|
---|
| 1621 | case R_X86_64_GLOB_DAT:
|
---|
| 1622 | case R_X86_64_JUMP_SLOT:
|
---|
| 1623 | *loc = v;
|
---|
| 1624 | break;
|
---|
| 1625 |
|
---|
| 1626 | case R_X86_64_RELATIVE:
|
---|
| 1627 | *loc += f->baseaddr;
|
---|
| 1628 | break;
|
---|
| 1629 |
|
---|
| 1630 | case R_X86_64_GOT32:
|
---|
| 1631 | case R_X86_64_GOTPCREL:
|
---|
| 1632 | goto bb_use_got;
|
---|
| 1633 | # if 0
|
---|
| 1634 | assert(isym != NULL);
|
---|
| 1635 | if (!isym->gotent.reloc_done)
|
---|
| 1636 | {
|
---|
| 1637 | isym->gotent.reloc_done = 1;
|
---|
| 1638 | *(Elf64_Addr *)(ifile->got->contents + isym->gotent.offset) = v;
|
---|
| 1639 | }
|
---|
| 1640 | /* XXX are these really correct? */
|
---|
| 1641 | if (ELF64_R_TYPE(rel->r_info) == R_X86_64_GOTPCREL)
|
---|
| 1642 | *(unsigned int *) loc += v + isym->gotent.offset;
|
---|
| 1643 | else
|
---|
| 1644 | *loc += isym->gotent.offset;
|
---|
| 1645 | break;
|
---|
| 1646 | # endif
|
---|
| 1647 |
|
---|
| 1648 | #else
|
---|
| 1649 | # warning "no idea how to handle relocations on your arch"
|
---|
| 1650 | #endif
|
---|
| 1651 |
|
---|
| 1652 | default:
|
---|
| 1653 | printf("Warning: unhandled reloc %d\n",(int)ELF_R_TYPE(rel->r_info));
|
---|
| 1654 | ret = obj_reloc_unhandled;
|
---|
| 1655 | break;
|
---|
| 1656 |
|
---|
| 1657 | #if defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 1658 |
|
---|
| 1659 | bb_use_plt:
|
---|
| 1660 |
|
---|
| 1661 | /* find the plt entry and initialize it if necessary */
|
---|
| 1662 | assert(isym != NULL);
|
---|
| 1663 |
|
---|
| 1664 | #if defined(CONFIG_USE_PLT_LIST)
|
---|
| 1665 | for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;)
|
---|
| 1666 | pe = pe->next;
|
---|
| 1667 | assert(pe != NULL);
|
---|
| 1668 | #else
|
---|
| 1669 | pe = &isym->pltent;
|
---|
| 1670 | #endif
|
---|
| 1671 |
|
---|
| 1672 | if (! pe->inited) {
|
---|
| 1673 | ip = (unsigned long *) (ifile->plt->contents + pe->offset);
|
---|
| 1674 |
|
---|
| 1675 | /* generate some machine code */
|
---|
| 1676 |
|
---|
| 1677 | #if defined(__arm__)
|
---|
| 1678 | ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */
|
---|
| 1679 | ip[1] = v; /* sym@ */
|
---|
| 1680 | #endif
|
---|
| 1681 | #if defined(__powerpc__)
|
---|
| 1682 | ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */
|
---|
| 1683 | ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */
|
---|
| 1684 | ip[2] = 0x7d6903a6; /* mtctr r11 */
|
---|
| 1685 | ip[3] = 0x4e800420; /* bctr */
|
---|
| 1686 | #endif
|
---|
| 1687 | #if defined (__v850e__)
|
---|
| 1688 | /* We have to trash a register, so we assume that any control
|
---|
| 1689 | transfer more than 21-bits away must be a function call
|
---|
| 1690 | (so we can use a call-clobbered register). */
|
---|
| 1691 | ip[0] = 0x0621 + ((v & 0xffff) << 16); /* mov sym, r1 ... */
|
---|
| 1692 | ip[1] = ((v >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */
|
---|
| 1693 | #endif
|
---|
| 1694 | pe->inited = 1;
|
---|
| 1695 | }
|
---|
| 1696 |
|
---|
| 1697 | /* relative distance to target */
|
---|
| 1698 | v -= dot;
|
---|
| 1699 | /* if the target is too far away.... */
|
---|
| 1700 | #if defined (__arm__) || defined (__powerpc__)
|
---|
| 1701 | if ((int)v < -0x02000000 || (int)v >= 0x02000000)
|
---|
| 1702 | #elif defined (__v850e__)
|
---|
| 1703 | if ((ElfW(Sword))v > 0x1fffff || (ElfW(Sword))v < (ElfW(Sword))-0x200000)
|
---|
| 1704 | #endif
|
---|
| 1705 | /* go via the plt */
|
---|
| 1706 | v = plt + pe->offset - dot;
|
---|
| 1707 |
|
---|
| 1708 | #if defined (__v850e__)
|
---|
| 1709 | if (v & 1)
|
---|
| 1710 | #else
|
---|
| 1711 | if (v & 3)
|
---|
| 1712 | #endif
|
---|
| 1713 | ret = obj_reloc_dangerous;
|
---|
| 1714 |
|
---|
| 1715 | /* merge the offset into the instruction. */
|
---|
| 1716 | #if defined(__arm__)
|
---|
| 1717 | /* Convert to words. */
|
---|
| 1718 | v >>= 2;
|
---|
| 1719 |
|
---|
| 1720 | *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff);
|
---|
| 1721 | #endif
|
---|
| 1722 | #if defined(__powerpc__)
|
---|
| 1723 | *loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc);
|
---|
| 1724 | #endif
|
---|
| 1725 | #if defined (__v850e__)
|
---|
| 1726 | /* We write two shorts instead of a long because even 32-bit insns
|
---|
| 1727 | only need half-word alignment, but the 32-bit data write needs
|
---|
| 1728 | to be long-word aligned. */
|
---|
| 1729 | ((unsigned short *)loc)[0] =
|
---|
| 1730 | (*(unsigned short *)loc & 0xffc0) /* opcode + reg */
|
---|
| 1731 | | ((v >> 16) & 0x3f); /* offs high part */
|
---|
| 1732 | ((unsigned short *)loc)[1] =
|
---|
| 1733 | (v & 0xffff); /* offs low part */
|
---|
| 1734 | #endif
|
---|
| 1735 | break;
|
---|
| 1736 | #endif /* CONFIG_USE_PLT_ENTRIES */
|
---|
| 1737 |
|
---|
| 1738 | #if defined(CONFIG_USE_GOT_ENTRIES)
|
---|
| 1739 | bb_use_got:
|
---|
| 1740 |
|
---|
| 1741 | assert(isym != NULL);
|
---|
| 1742 | /* needs an entry in the .got: set it, once */
|
---|
| 1743 | if (!isym->gotent.inited) {
|
---|
| 1744 | isym->gotent.inited = 1;
|
---|
| 1745 | *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v;
|
---|
| 1746 | }
|
---|
| 1747 | /* make the reloc with_respect_to_.got */
|
---|
| 1748 | #if defined(__sh__)
|
---|
| 1749 | *loc += isym->gotent.offset + rel->r_addend;
|
---|
| 1750 | #elif defined(__i386__) || defined(__arm__) || defined(__mc68000__)
|
---|
| 1751 | *loc += isym->gotent.offset;
|
---|
| 1752 | #endif
|
---|
| 1753 | break;
|
---|
| 1754 |
|
---|
| 1755 | #endif /* CONFIG_USE_GOT_ENTRIES */
|
---|
| 1756 | }
|
---|
| 1757 |
|
---|
| 1758 | return ret;
|
---|
| 1759 | }
|
---|
| 1760 |
|
---|
| 1761 |
|
---|
| 1762 | #if defined(CONFIG_USE_LIST)
|
---|
| 1763 |
|
---|
| 1764 | static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list,
|
---|
| 1765 | int offset, int size)
|
---|
| 1766 | {
|
---|
| 1767 | struct arch_list_entry *pe;
|
---|
| 1768 |
|
---|
| 1769 | for (pe = *list; pe != NULL; pe = pe->next) {
|
---|
| 1770 | if (pe->addend == rel->r_addend) {
|
---|
| 1771 | break;
|
---|
| 1772 | }
|
---|
| 1773 | }
|
---|
| 1774 |
|
---|
| 1775 | if (pe == NULL) {
|
---|
| 1776 | pe = xmalloc(sizeof(struct arch_list_entry));
|
---|
| 1777 | pe->next = *list;
|
---|
| 1778 | pe->addend = rel->r_addend;
|
---|
| 1779 | pe->offset = offset;
|
---|
| 1780 | pe->inited = 0;
|
---|
| 1781 | *list = pe;
|
---|
| 1782 | return size;
|
---|
| 1783 | }
|
---|
| 1784 | return 0;
|
---|
| 1785 | }
|
---|
| 1786 |
|
---|
| 1787 | #endif
|
---|
| 1788 |
|
---|
| 1789 | #if defined(CONFIG_USE_SINGLE)
|
---|
| 1790 |
|
---|
| 1791 | static int arch_single_init(ElfW(RelM) *rel, struct arch_single_entry *single,
|
---|
| 1792 | int offset, int size)
|
---|
| 1793 | {
|
---|
| 1794 | if (single->allocated == 0) {
|
---|
| 1795 | single->allocated = 1;
|
---|
| 1796 | single->offset = offset;
|
---|
| 1797 | single->inited = 0;
|
---|
| 1798 | return size;
|
---|
| 1799 | }
|
---|
| 1800 | return 0;
|
---|
| 1801 | }
|
---|
| 1802 |
|
---|
| 1803 | #endif
|
---|
| 1804 |
|
---|
| 1805 | #if defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 1806 |
|
---|
| 1807 | static struct obj_section *arch_xsect_init(struct obj_file *f, char *name,
|
---|
| 1808 | int offset, int size)
|
---|
| 1809 | {
|
---|
| 1810 | struct obj_section *myrelsec = obj_find_section(f, name);
|
---|
| 1811 |
|
---|
| 1812 | if (offset == 0) {
|
---|
| 1813 | offset += size;
|
---|
| 1814 | }
|
---|
| 1815 |
|
---|
| 1816 | if (myrelsec) {
|
---|
| 1817 | obj_extend_section(myrelsec, offset);
|
---|
| 1818 | } else {
|
---|
| 1819 | myrelsec = obj_create_alloced_section(f, name,
|
---|
| 1820 | size, offset);
|
---|
| 1821 | assert(myrelsec);
|
---|
| 1822 | }
|
---|
| 1823 |
|
---|
| 1824 | return myrelsec;
|
---|
| 1825 | }
|
---|
| 1826 |
|
---|
| 1827 | #endif
|
---|
| 1828 |
|
---|
| 1829 | static void arch_create_got(struct obj_file *f)
|
---|
| 1830 | {
|
---|
| 1831 | #if defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 1832 | struct arch_file *ifile = (struct arch_file *) f;
|
---|
| 1833 | int i;
|
---|
| 1834 | #if defined(CONFIG_USE_GOT_ENTRIES)
|
---|
| 1835 | int got_offset = 0, got_needed = 0, got_allocate;
|
---|
| 1836 | #endif
|
---|
| 1837 | #if defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 1838 | int plt_offset = 0, plt_needed = 0, plt_allocate;
|
---|
| 1839 | #endif
|
---|
| 1840 | struct obj_section *relsec, *symsec, *strsec;
|
---|
| 1841 | ElfW(RelM) *rel, *relend;
|
---|
| 1842 | ElfW(Sym) *symtab, *extsym;
|
---|
| 1843 | const char *strtab, *name;
|
---|
| 1844 | struct arch_symbol *intsym;
|
---|
| 1845 |
|
---|
| 1846 | for (i = 0; i < f->header.e_shnum; ++i) {
|
---|
| 1847 | relsec = f->sections[i];
|
---|
| 1848 | if (relsec->header.sh_type != SHT_RELM)
|
---|
| 1849 | continue;
|
---|
| 1850 |
|
---|
| 1851 | symsec = f->sections[relsec->header.sh_link];
|
---|
| 1852 | strsec = f->sections[symsec->header.sh_link];
|
---|
| 1853 |
|
---|
| 1854 | rel = (ElfW(RelM) *) relsec->contents;
|
---|
| 1855 | relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM)));
|
---|
| 1856 | symtab = (ElfW(Sym) *) symsec->contents;
|
---|
| 1857 | strtab = (const char *) strsec->contents;
|
---|
| 1858 |
|
---|
| 1859 | for (; rel < relend; ++rel) {
|
---|
| 1860 | extsym = &symtab[ELF_R_SYM(rel->r_info)];
|
---|
| 1861 |
|
---|
| 1862 | #if defined(CONFIG_USE_GOT_ENTRIES)
|
---|
| 1863 | got_allocate = 0;
|
---|
| 1864 | #endif
|
---|
| 1865 | #if defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 1866 | plt_allocate = 0;
|
---|
| 1867 | #endif
|
---|
| 1868 |
|
---|
| 1869 | switch (ELF_R_TYPE(rel->r_info)) {
|
---|
| 1870 | #if defined(__arm__)
|
---|
| 1871 | case R_ARM_PC24:
|
---|
| 1872 | case R_ARM_PLT32:
|
---|
| 1873 | plt_allocate = 1;
|
---|
| 1874 | break;
|
---|
| 1875 |
|
---|
| 1876 | case R_ARM_GOTOFF:
|
---|
| 1877 | case R_ARM_GOTPC:
|
---|
| 1878 | got_needed = 1;
|
---|
| 1879 | continue;
|
---|
| 1880 |
|
---|
| 1881 | case R_ARM_GOT32:
|
---|
| 1882 | got_allocate = 1;
|
---|
| 1883 | break;
|
---|
| 1884 |
|
---|
| 1885 | #elif defined(__i386__)
|
---|
| 1886 | case R_386_GOTPC:
|
---|
| 1887 | case R_386_GOTOFF:
|
---|
| 1888 | got_needed = 1;
|
---|
| 1889 | continue;
|
---|
| 1890 |
|
---|
| 1891 | case R_386_GOT32:
|
---|
| 1892 | got_allocate = 1;
|
---|
| 1893 | break;
|
---|
| 1894 |
|
---|
| 1895 | #elif defined(__powerpc__)
|
---|
| 1896 | case R_PPC_REL24:
|
---|
| 1897 | plt_allocate = 1;
|
---|
| 1898 | break;
|
---|
| 1899 |
|
---|
| 1900 | #elif defined(__mc68000__)
|
---|
| 1901 | case R_68K_GOT32:
|
---|
| 1902 | got_allocate = 1;
|
---|
| 1903 | break;
|
---|
| 1904 |
|
---|
| 1905 | #ifdef R_68K_GOTOFF
|
---|
| 1906 | case R_68K_GOTOFF:
|
---|
| 1907 | got_needed = 1;
|
---|
| 1908 | continue;
|
---|
| 1909 | #endif
|
---|
| 1910 |
|
---|
| 1911 | #elif defined(__sh__)
|
---|
| 1912 | case R_SH_GOT32:
|
---|
| 1913 | got_allocate = 1;
|
---|
| 1914 | break;
|
---|
| 1915 |
|
---|
| 1916 | case R_SH_GOTPC:
|
---|
| 1917 | case R_SH_GOTOFF:
|
---|
| 1918 | got_needed = 1;
|
---|
| 1919 | continue;
|
---|
| 1920 |
|
---|
| 1921 | #elif defined (__v850e__)
|
---|
| 1922 | case R_V850_22_PCREL:
|
---|
| 1923 | plt_needed = 1;
|
---|
| 1924 | break;
|
---|
| 1925 |
|
---|
| 1926 | #endif
|
---|
| 1927 | default:
|
---|
| 1928 | continue;
|
---|
| 1929 | }
|
---|
| 1930 |
|
---|
| 1931 | if (extsym->st_name != 0) {
|
---|
| 1932 | name = strtab + extsym->st_name;
|
---|
| 1933 | } else {
|
---|
| 1934 | name = f->sections[extsym->st_shndx]->name;
|
---|
| 1935 | }
|
---|
| 1936 | intsym = (struct arch_symbol *) obj_find_symbol(f, name);
|
---|
| 1937 | #if defined(CONFIG_USE_GOT_ENTRIES)
|
---|
| 1938 | if (got_allocate) {
|
---|
| 1939 | got_offset += arch_single_init(
|
---|
| 1940 | rel, &intsym->gotent,
|
---|
| 1941 | got_offset, CONFIG_GOT_ENTRY_SIZE);
|
---|
| 1942 |
|
---|
| 1943 | got_needed = 1;
|
---|
| 1944 | }
|
---|
| 1945 | #endif
|
---|
| 1946 | #if defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 1947 | if (plt_allocate) {
|
---|
| 1948 | #if defined(CONFIG_USE_PLT_LIST)
|
---|
| 1949 | plt_offset += arch_list_add(
|
---|
| 1950 | rel, &intsym->pltent,
|
---|
| 1951 | plt_offset, CONFIG_PLT_ENTRY_SIZE);
|
---|
| 1952 | #else
|
---|
| 1953 | plt_offset += arch_single_init(
|
---|
| 1954 | rel, &intsym->pltent,
|
---|
| 1955 | plt_offset, CONFIG_PLT_ENTRY_SIZE);
|
---|
| 1956 | #endif
|
---|
| 1957 | plt_needed = 1;
|
---|
| 1958 | }
|
---|
| 1959 | #endif
|
---|
| 1960 | }
|
---|
| 1961 | }
|
---|
| 1962 |
|
---|
| 1963 | #if defined(CONFIG_USE_GOT_ENTRIES)
|
---|
| 1964 | if (got_needed) {
|
---|
| 1965 | ifile->got = arch_xsect_init(f, ".got", got_offset,
|
---|
| 1966 | CONFIG_GOT_ENTRY_SIZE);
|
---|
| 1967 | }
|
---|
| 1968 | #endif
|
---|
| 1969 |
|
---|
| 1970 | #if defined(CONFIG_USE_PLT_ENTRIES)
|
---|
| 1971 | if (plt_needed) {
|
---|
| 1972 | ifile->plt = arch_xsect_init(f, ".plt", plt_offset,
|
---|
| 1973 | CONFIG_PLT_ENTRY_SIZE);
|
---|
| 1974 | }
|
---|
| 1975 | #endif
|
---|
| 1976 |
|
---|
| 1977 | #endif /* defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) */
|
---|
| 1978 | }
|
---|
| 1979 |
|
---|
| 1980 | /*======================================================================*/
|
---|
| 1981 |
|
---|
| 1982 | /* Standard ELF hash function. */
|
---|
| 1983 | static inline unsigned long obj_elf_hash_n(const char *name, unsigned long n)
|
---|
| 1984 | {
|
---|
| 1985 | unsigned long h = 0;
|
---|
| 1986 | unsigned long g;
|
---|
| 1987 | unsigned char ch;
|
---|
| 1988 |
|
---|
| 1989 | while (n > 0) {
|
---|
| 1990 | ch = *name++;
|
---|
| 1991 | h = (h << 4) + ch;
|
---|
| 1992 | if ((g = (h & 0xf0000000)) != 0) {
|
---|
| 1993 | h ^= g >> 24;
|
---|
| 1994 | h &= ~g;
|
---|
| 1995 | }
|
---|
| 1996 | n--;
|
---|
| 1997 | }
|
---|
| 1998 | return h;
|
---|
| 1999 | }
|
---|
| 2000 |
|
---|
| 2001 | static unsigned long obj_elf_hash(const char *name)
|
---|
| 2002 | {
|
---|
| 2003 | return obj_elf_hash_n(name, strlen(name));
|
---|
| 2004 | }
|
---|
| 2005 |
|
---|
| 2006 | #ifdef CONFIG_FEATURE_INSMOD_VERSION_CHECKING
|
---|
| 2007 | /* String comparison for non-co-versioned kernel and module. */
|
---|
| 2008 |
|
---|
| 2009 | static int ncv_strcmp(const char *a, const char *b)
|
---|
| 2010 | {
|
---|
| 2011 | size_t alen = strlen(a), blen = strlen(b);
|
---|
| 2012 |
|
---|
| 2013 | if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R')
|
---|
| 2014 | return strncmp(a, b, alen);
|
---|
| 2015 | else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R')
|
---|
| 2016 | return strncmp(a, b, blen);
|
---|
| 2017 | else
|
---|
| 2018 | return strcmp(a, b);
|
---|
| 2019 | }
|
---|
| 2020 |
|
---|
| 2021 | /* String hashing for non-co-versioned kernel and module. Here
|
---|
| 2022 | we are simply forced to drop the crc from the hash. */
|
---|
| 2023 |
|
---|
| 2024 | static unsigned long ncv_symbol_hash(const char *str)
|
---|
| 2025 | {
|
---|
| 2026 | size_t len = strlen(str);
|
---|
| 2027 | if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R')
|
---|
| 2028 | len -= 10;
|
---|
| 2029 | return obj_elf_hash_n(str, len);
|
---|
| 2030 | }
|
---|
| 2031 |
|
---|
| 2032 | static void
|
---|
| 2033 | obj_set_symbol_compare(struct obj_file *f,
|
---|
| 2034 | int (*cmp) (const char *, const char *),
|
---|
| 2035 | unsigned long (*hash) (const char *))
|
---|
| 2036 | {
|
---|
| 2037 | if (cmp)
|
---|
| 2038 | f->symbol_cmp = cmp;
|
---|
| 2039 | if (hash) {
|
---|
| 2040 | struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next;
|
---|
| 2041 | int i;
|
---|
| 2042 |
|
---|
| 2043 | f->symbol_hash = hash;
|
---|
| 2044 |
|
---|
| 2045 | memcpy(tmptab, f->symtab, sizeof(tmptab));
|
---|
| 2046 | memset(f->symtab, 0, sizeof(f->symtab));
|
---|
| 2047 |
|
---|
| 2048 | for (i = 0; i < HASH_BUCKETS; ++i)
|
---|
| 2049 | for (sym = tmptab[i]; sym; sym = next) {
|
---|
| 2050 | unsigned long h = hash(sym->name) % HASH_BUCKETS;
|
---|
| 2051 | next = sym->next;
|
---|
| 2052 | sym->next = f->symtab[h];
|
---|
| 2053 | f->symtab[h] = sym;
|
---|
| 2054 | }
|
---|
| 2055 | }
|
---|
| 2056 | }
|
---|
| 2057 |
|
---|
| 2058 | #endif /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */
|
---|
| 2059 |
|
---|
| 2060 | static struct obj_symbol *
|
---|
| 2061 | obj_add_symbol(struct obj_file *f, const char *name,
|
---|
| 2062 | unsigned long symidx, int info,
|
---|
| 2063 | int secidx, ElfW(Addr) value,
|
---|
| 2064 | unsigned long size)
|
---|
| 2065 | {
|
---|
| 2066 | struct obj_symbol *sym;
|
---|
| 2067 | unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
|
---|
| 2068 | int n_type = ELF_ST_TYPE(info);
|
---|
| 2069 | int n_binding = ELF_ST_BIND(info);
|
---|
| 2070 |
|
---|
| 2071 | for (sym = f->symtab[hash]; sym; sym = sym->next)
|
---|
| 2072 | if (f->symbol_cmp(sym->name, name) == 0) {
|
---|
| 2073 | int o_secidx = sym->secidx;
|
---|
| 2074 | int o_info = sym->info;
|
---|
| 2075 | int o_type = ELF_ST_TYPE(o_info);
|
---|
| 2076 | int o_binding = ELF_ST_BIND(o_info);
|
---|
| 2077 |
|
---|
| 2078 | /* A redefinition! Is it legal? */
|
---|
| 2079 |
|
---|
| 2080 | if (secidx == SHN_UNDEF)
|
---|
| 2081 | return sym;
|
---|
| 2082 | else if (o_secidx == SHN_UNDEF)
|
---|
| 2083 | goto found;
|
---|
| 2084 | else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) {
|
---|
| 2085 | /* Cope with local and global symbols of the same name
|
---|
| 2086 | in the same object file, as might have been created
|
---|
| 2087 | by ld -r. The only reason locals are now seen at this
|
---|
| 2088 | level at all is so that we can do semi-sensible things
|
---|
| 2089 | with parameters. */
|
---|
| 2090 |
|
---|
| 2091 | struct obj_symbol *nsym, **p;
|
---|
| 2092 |
|
---|
| 2093 | nsym = arch_new_symbol();
|
---|
| 2094 | nsym->next = sym->next;
|
---|
| 2095 | nsym->ksymidx = -1;
|
---|
| 2096 |
|
---|
| 2097 | /* Excise the old (local) symbol from the hash chain. */
|
---|
| 2098 | for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next)
|
---|
| 2099 | continue;
|
---|
| 2100 | *p = sym = nsym;
|
---|
| 2101 | goto found;
|
---|
| 2102 | } else if (n_binding == STB_LOCAL) {
|
---|
| 2103 | /* Another symbol of the same name has already been defined.
|
---|
| 2104 | Just add this to the local table. */
|
---|
| 2105 | sym = arch_new_symbol();
|
---|
| 2106 | sym->next = NULL;
|
---|
| 2107 | sym->ksymidx = -1;
|
---|
| 2108 | f->local_symtab[symidx] = sym;
|
---|
| 2109 | goto found;
|
---|
| 2110 | } else if (n_binding == STB_WEAK)
|
---|
| 2111 | return sym;
|
---|
| 2112 | else if (o_binding == STB_WEAK)
|
---|
| 2113 | goto found;
|
---|
| 2114 | /* Don't unify COMMON symbols with object types the programmer
|
---|
| 2115 | doesn't expect. */
|
---|
| 2116 | else if (secidx == SHN_COMMON
|
---|
| 2117 | && (o_type == STT_NOTYPE || o_type == STT_OBJECT))
|
---|
| 2118 | return sym;
|
---|
| 2119 | else if (o_secidx == SHN_COMMON
|
---|
| 2120 | && (n_type == STT_NOTYPE || n_type == STT_OBJECT))
|
---|
| 2121 | goto found;
|
---|
| 2122 | else {
|
---|
| 2123 | /* Don't report an error if the symbol is coming from
|
---|
| 2124 | the kernel or some external module. */
|
---|
| 2125 | if (secidx <= SHN_HIRESERVE)
|
---|
| 2126 | bb_error_msg("%s multiply defined", name);
|
---|
| 2127 | return sym;
|
---|
| 2128 | }
|
---|
| 2129 | }
|
---|
| 2130 |
|
---|
| 2131 | /* Completely new symbol. */
|
---|
| 2132 | sym = arch_new_symbol();
|
---|
| 2133 | sym->next = f->symtab[hash];
|
---|
| 2134 | f->symtab[hash] = sym;
|
---|
| 2135 | sym->ksymidx = -1;
|
---|
| 2136 |
|
---|
| 2137 | if (ELF_ST_BIND(info) == STB_LOCAL && symidx != -1) {
|
---|
| 2138 | if (symidx >= f->local_symtab_size)
|
---|
| 2139 | bb_error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld",
|
---|
| 2140 | name, (long) symidx, (long) f->local_symtab_size);
|
---|
| 2141 | else
|
---|
| 2142 | f->local_symtab[symidx] = sym;
|
---|
| 2143 | }
|
---|
| 2144 |
|
---|
| 2145 | found:
|
---|
| 2146 | sym->name = name;
|
---|
| 2147 | sym->value = value;
|
---|
| 2148 | sym->size = size;
|
---|
| 2149 | sym->secidx = secidx;
|
---|
| 2150 | sym->info = info;
|
---|
| 2151 |
|
---|
| 2152 | return sym;
|
---|
| 2153 | }
|
---|
| 2154 |
|
---|
| 2155 | static struct obj_symbol *
|
---|
| 2156 | obj_find_symbol(struct obj_file *f, const char *name)
|
---|
| 2157 | {
|
---|
| 2158 | struct obj_symbol *sym;
|
---|
| 2159 | unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
|
---|
| 2160 |
|
---|
| 2161 | for (sym = f->symtab[hash]; sym; sym = sym->next)
|
---|
| 2162 | if (f->symbol_cmp(sym->name, name) == 0)
|
---|
| 2163 | return sym;
|
---|
| 2164 |
|
---|
| 2165 | return NULL;
|
---|
| 2166 | }
|
---|
| 2167 |
|
---|
| 2168 | static ElfW(Addr)
|
---|
| 2169 | obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym)
|
---|
| 2170 | {
|
---|
| 2171 | if (sym) {
|
---|
| 2172 | if (sym->secidx >= SHN_LORESERVE)
|
---|
| 2173 | return sym->value;
|
---|
| 2174 |
|
---|
| 2175 | return sym->value + f->sections[sym->secidx]->header.sh_addr;
|
---|
| 2176 | } else {
|
---|
| 2177 | /* As a special case, a NULL sym has value zero. */
|
---|
| 2178 | return 0;
|
---|
| 2179 | }
|
---|
| 2180 | }
|
---|
| 2181 |
|
---|
| 2182 | static struct obj_section *obj_find_section(struct obj_file *f, const char *name)
|
---|
| 2183 | {
|
---|
| 2184 | int i, n = f->header.e_shnum;
|
---|
| 2185 |
|
---|
| 2186 | for (i = 0; i < n; ++i)
|
---|
| 2187 | if (strcmp(f->sections[i]->name, name) == 0)
|
---|
| 2188 | return f->sections[i];
|
---|
| 2189 |
|
---|
| 2190 | return NULL;
|
---|
| 2191 | }
|
---|
| 2192 |
|
---|
| 2193 | static int obj_load_order_prio(struct obj_section *a)
|
---|
| 2194 | {
|
---|
| 2195 | unsigned long af, ac;
|
---|
| 2196 |
|
---|
| 2197 | af = a->header.sh_flags;
|
---|
| 2198 |
|
---|
| 2199 | ac = 0;
|
---|
| 2200 | if (a->name[0] != '.' || strlen(a->name) != 10 ||
|
---|
| 2201 | strcmp(a->name + 5, ".init"))
|
---|
| 2202 | ac |= 32;
|
---|
| 2203 | if (af & SHF_ALLOC)
|
---|
| 2204 | ac |= 16;
|
---|
| 2205 | if (!(af & SHF_WRITE))
|
---|
| 2206 | ac |= 8;
|
---|
| 2207 | if (af & SHF_EXECINSTR)
|
---|
| 2208 | ac |= 4;
|
---|
| 2209 | if (a->header.sh_type != SHT_NOBITS)
|
---|
| 2210 | ac |= 2;
|
---|
| 2211 |
|
---|
| 2212 | return ac;
|
---|
| 2213 | }
|
---|
| 2214 |
|
---|
| 2215 | static void
|
---|
| 2216 | obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec)
|
---|
| 2217 | {
|
---|
| 2218 | struct obj_section **p;
|
---|
| 2219 | int prio = obj_load_order_prio(sec);
|
---|
| 2220 | for (p = f->load_order_search_start; *p; p = &(*p)->load_next)
|
---|
| 2221 | if (obj_load_order_prio(*p) < prio)
|
---|
| 2222 | break;
|
---|
| 2223 | sec->load_next = *p;
|
---|
| 2224 | *p = sec;
|
---|
| 2225 | }
|
---|
| 2226 |
|
---|
| 2227 | static struct obj_section *obj_create_alloced_section(struct obj_file *f,
|
---|
| 2228 | const char *name,
|
---|
| 2229 | unsigned long align,
|
---|
| 2230 | unsigned long size)
|
---|
| 2231 | {
|
---|
| 2232 | int newidx = f->header.e_shnum++;
|
---|
| 2233 | struct obj_section *sec;
|
---|
| 2234 |
|
---|
| 2235 | f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec));
|
---|
| 2236 | f->sections[newidx] = sec = arch_new_section();
|
---|
| 2237 |
|
---|
| 2238 | memset(sec, 0, sizeof(*sec));
|
---|
| 2239 | sec->header.sh_type = SHT_PROGBITS;
|
---|
| 2240 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
|
---|
| 2241 | sec->header.sh_size = size;
|
---|
| 2242 | sec->header.sh_addralign = align;
|
---|
| 2243 | sec->name = name;
|
---|
| 2244 | sec->idx = newidx;
|
---|
| 2245 | if (size)
|
---|
| 2246 | sec->contents = xmalloc(size);
|
---|
| 2247 |
|
---|
| 2248 | obj_insert_section_load_order(f, sec);
|
---|
| 2249 |
|
---|
| 2250 | return sec;
|
---|
| 2251 | }
|
---|
| 2252 |
|
---|
| 2253 | static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
|
---|
| 2254 | const char *name,
|
---|
| 2255 | unsigned long align,
|
---|
| 2256 | unsigned long size)
|
---|
| 2257 | {
|
---|
| 2258 | int newidx = f->header.e_shnum++;
|
---|
| 2259 | struct obj_section *sec;
|
---|
| 2260 |
|
---|
| 2261 | f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec));
|
---|
| 2262 | f->sections[newidx] = sec = arch_new_section();
|
---|
| 2263 |
|
---|
| 2264 | memset(sec, 0, sizeof(*sec));
|
---|
| 2265 | sec->header.sh_type = SHT_PROGBITS;
|
---|
| 2266 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
|
---|
| 2267 | sec->header.sh_size = size;
|
---|
| 2268 | sec->header.sh_addralign = align;
|
---|
| 2269 | sec->name = name;
|
---|
| 2270 | sec->idx = newidx;
|
---|
| 2271 | if (size)
|
---|
| 2272 | sec->contents = xmalloc(size);
|
---|
| 2273 |
|
---|
| 2274 | sec->load_next = f->load_order;
|
---|
| 2275 | f->load_order = sec;
|
---|
| 2276 | if (f->load_order_search_start == &f->load_order)
|
---|
| 2277 | f->load_order_search_start = &sec->load_next;
|
---|
| 2278 |
|
---|
| 2279 | return sec;
|
---|
| 2280 | }
|
---|
| 2281 |
|
---|
| 2282 | static void *obj_extend_section(struct obj_section *sec, unsigned long more)
|
---|
| 2283 | {
|
---|
| 2284 | unsigned long oldsize = sec->header.sh_size;
|
---|
| 2285 | if (more) {
|
---|
| 2286 | sec->contents = xrealloc(sec->contents, sec->header.sh_size += more);
|
---|
| 2287 | }
|
---|
| 2288 | return sec->contents + oldsize;
|
---|
| 2289 | }
|
---|
| 2290 |
|
---|
| 2291 |
|
---|
| 2292 | /* Conditionally add the symbols from the given symbol set to the
|
---|
| 2293 | new module. */
|
---|
| 2294 |
|
---|
| 2295 | static int
|
---|
| 2296 | add_symbols_from( struct obj_file *f,
|
---|
| 2297 | int idx, struct new_module_symbol *syms, size_t nsyms)
|
---|
| 2298 | {
|
---|
| 2299 | struct new_module_symbol *s;
|
---|
| 2300 | size_t i;
|
---|
| 2301 | int used = 0;
|
---|
| 2302 | #ifdef SYMBOL_PREFIX
|
---|
| 2303 | char *name_buf = 0;
|
---|
| 2304 | size_t name_alloced_size = 0;
|
---|
| 2305 | #endif
|
---|
| 2306 | #ifdef CONFIG_FEATURE_CHECK_TAINTED_MODULE
|
---|
| 2307 | int gpl;
|
---|
| 2308 |
|
---|
| 2309 | gpl = obj_gpl_license(f, NULL) == 0;
|
---|
| 2310 | #endif
|
---|
| 2311 | for (i = 0, s = syms; i < nsyms; ++i, ++s) {
|
---|
| 2312 | /* Only add symbols that are already marked external.
|
---|
| 2313 | If we override locals we may cause problems for
|
---|
| 2314 | argument initialization. We will also create a false
|
---|
| 2315 | dependency on the module. */
|
---|
| 2316 | struct obj_symbol *sym;
|
---|
| 2317 | char *name;
|
---|
| 2318 |
|
---|
| 2319 | /* GPL licensed modules can use symbols exported with
|
---|
| 2320 | * EXPORT_SYMBOL_GPL, so ignore any GPLONLY_ prefix on the
|
---|
| 2321 | * exported names. Non-GPL modules never see any GPLONLY_
|
---|
| 2322 | * symbols so they cannot fudge it by adding the prefix on
|
---|
| 2323 | * their references.
|
---|
| 2324 | */
|
---|
| 2325 | if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) {
|
---|
| 2326 | #ifdef CONFIG_FEATURE_CHECK_TAINTED_MODULE
|
---|
| 2327 | if (gpl)
|
---|
| 2328 | s->name += 8;
|
---|
| 2329 | else
|
---|
| 2330 | #endif
|
---|
| 2331 | continue;
|
---|
| 2332 | }
|
---|
| 2333 | name = (char *)s->name;
|
---|
| 2334 |
|
---|
| 2335 | #ifdef SYMBOL_PREFIX
|
---|
| 2336 | /* Prepend SYMBOL_PREFIX to the symbol's name (the
|
---|
| 2337 | kernel exports `C names', but module object files
|
---|
| 2338 | reference `linker names'). */
|
---|
| 2339 | size_t extra = sizeof SYMBOL_PREFIX;
|
---|
| 2340 | size_t name_size = strlen (name) + extra;
|
---|
| 2341 | if (name_size > name_alloced_size) {
|
---|
| 2342 | name_alloced_size = name_size * 2;
|
---|
| 2343 | name_buf = alloca (name_alloced_size);
|
---|
| 2344 | }
|
---|
| 2345 | strcpy (name_buf, SYMBOL_PREFIX);
|
---|
| 2346 | strcpy (name_buf + extra - 1, name);
|
---|
| 2347 | name = name_buf;
|
---|
| 2348 | #endif /* SYMBOL_PREFIX */
|
---|
| 2349 |
|
---|
| 2350 | sym = obj_find_symbol(f, name);
|
---|
| 2351 | if (sym && !(ELF_ST_BIND(sym->info) == STB_LOCAL)) {
|
---|
| 2352 | #ifdef SYMBOL_PREFIX
|
---|
| 2353 | /* Put NAME_BUF into more permanent storage. */
|
---|
| 2354 | name = xmalloc (name_size);
|
---|
| 2355 | strcpy (name, name_buf);
|
---|
| 2356 | #endif
|
---|
| 2357 | sym = obj_add_symbol(f, name, -1,
|
---|
| 2358 | ELF_ST_INFO(STB_GLOBAL,
|
---|
| 2359 | STT_NOTYPE),
|
---|
| 2360 | idx, s->value, 0);
|
---|
| 2361 | /* Did our symbol just get installed? If so, mark the
|
---|
| 2362 | module as "used". */
|
---|
| 2363 | if (sym->secidx == idx)
|
---|
| 2364 | used = 1;
|
---|
| 2365 | }
|
---|
| 2366 | }
|
---|
| 2367 |
|
---|
| 2368 | return used;
|
---|
| 2369 | }
|
---|
| 2370 |
|
---|
| 2371 | static void add_kernel_symbols(struct obj_file *f)
|
---|
| 2372 | {
|
---|
| 2373 | struct external_module *m;
|
---|
| 2374 | int i, nused = 0;
|
---|
| 2375 |
|
---|
| 2376 | /* Add module symbols first. */
|
---|
| 2377 |
|
---|
| 2378 | for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m)
|
---|
| 2379 | if (m->nsyms
|
---|
| 2380 | && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms,
|
---|
| 2381 | m->nsyms)) m->used = 1, ++nused;
|
---|
| 2382 |
|
---|
| 2383 | n_ext_modules_used = nused;
|
---|
| 2384 |
|
---|
| 2385 | /* And finally the symbols from the kernel proper. */
|
---|
| 2386 |
|
---|
| 2387 | if (nksyms)
|
---|
| 2388 | add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms);
|
---|
| 2389 | }
|
---|
| 2390 |
|
---|
| 2391 | static char *get_modinfo_value(struct obj_file *f, const char *key)
|
---|
| 2392 | {
|
---|
| 2393 | struct obj_section *sec;
|
---|
| 2394 | char *p, *v, *n, *ep;
|
---|
| 2395 | size_t klen = strlen(key);
|
---|
| 2396 |
|
---|
| 2397 | sec = obj_find_section(f, ".modinfo");
|
---|
| 2398 | if (sec == NULL)
|
---|
| 2399 | return NULL;
|
---|
| 2400 | p = sec->contents;
|
---|
| 2401 | ep = p + sec->header.sh_size;
|
---|
| 2402 | while (p < ep) {
|
---|
| 2403 | v = strchr(p, '=');
|
---|
| 2404 | n = strchr(p, '\0');
|
---|
| 2405 | if (v) {
|
---|
| 2406 | if (p + klen == v && strncmp(p, key, klen) == 0)
|
---|
| 2407 | return v + 1;
|
---|
| 2408 | } else {
|
---|
| 2409 | if (p + klen == n && strcmp(p, key) == 0)
|
---|
| 2410 | return n;
|
---|
| 2411 | }
|
---|
| 2412 | p = n + 1;
|
---|
| 2413 | }
|
---|
| 2414 |
|
---|
| 2415 | return NULL;
|
---|
| 2416 | }
|
---|
| 2417 |
|
---|
| 2418 |
|
---|
| 2419 | /*======================================================================*/
|
---|
| 2420 | /* Functions relating to module loading after 2.1.18. */
|
---|
| 2421 |
|
---|
| 2422 | static int
|
---|
| 2423 | new_process_module_arguments(struct obj_file *f, int argc, char **argv)
|
---|
| 2424 | {
|
---|
| 2425 | while (argc > 0) {
|
---|
| 2426 | char *p, *q, *key, *sym_name;
|
---|
| 2427 | struct obj_symbol *sym;
|
---|
| 2428 | char *contents, *loc;
|
---|
| 2429 | int min, max, n;
|
---|
| 2430 |
|
---|
| 2431 | p = *argv;
|
---|
| 2432 | if ((q = strchr(p, '=')) == NULL) {
|
---|
| 2433 | argc--;
|
---|
| 2434 | continue;
|
---|
| 2435 | }
|
---|
| 2436 |
|
---|
| 2437 | key = alloca(q - p + 6);
|
---|
| 2438 | memcpy(key, "parm_", 5);
|
---|
| 2439 | memcpy(key + 5, p, q - p);
|
---|
| 2440 | key[q - p + 5] = 0;
|
---|
| 2441 |
|
---|
| 2442 | p = get_modinfo_value(f, key);
|
---|
| 2443 | key += 5;
|
---|
| 2444 | if (p == NULL) {
|
---|
| 2445 | bb_error_msg("invalid parameter %s", key);
|
---|
| 2446 | return 0;
|
---|
| 2447 | }
|
---|
| 2448 |
|
---|
| 2449 | #ifdef SYMBOL_PREFIX
|
---|
| 2450 | sym_name = alloca (strlen (key) + sizeof SYMBOL_PREFIX);
|
---|
| 2451 | strcpy (sym_name, SYMBOL_PREFIX);
|
---|
| 2452 | strcat (sym_name, key);
|
---|
| 2453 | #else
|
---|
| 2454 | sym_name = key;
|
---|
| 2455 | #endif
|
---|
| 2456 | sym = obj_find_symbol(f, sym_name);
|
---|
| 2457 |
|
---|
| 2458 | /* Also check that the parameter was not resolved from the kernel. */
|
---|
| 2459 | if (sym == NULL || sym->secidx > SHN_HIRESERVE) {
|
---|
| 2460 | bb_error_msg("symbol for parameter %s not found", key);
|
---|
| 2461 | return 0;
|
---|
| 2462 | }
|
---|
| 2463 |
|
---|
| 2464 | if (isdigit(*p)) {
|
---|
| 2465 | min = strtoul(p, &p, 10);
|
---|
| 2466 | if (*p == '-')
|
---|
| 2467 | max = strtoul(p + 1, &p, 10);
|
---|
| 2468 | else
|
---|
| 2469 | max = min;
|
---|
| 2470 | } else
|
---|
| 2471 | min = max = 1;
|
---|
| 2472 |
|
---|
| 2473 | contents = f->sections[sym->secidx]->contents;
|
---|
| 2474 | loc = contents + sym->value;
|
---|
| 2475 | n = (*++q != '\0');
|
---|
| 2476 |
|
---|
| 2477 | while (1) {
|
---|
| 2478 | if ((*p == 's') || (*p == 'c')) {
|
---|
| 2479 | char *str;
|
---|
| 2480 |
|
---|
| 2481 | /* Do C quoting if we begin with a ", else slurp the lot. */
|
---|
| 2482 | if (*q == '"') {
|
---|
| 2483 | char *r;
|
---|
| 2484 |
|
---|
| 2485 | str = alloca(strlen(q));
|
---|
| 2486 | for (r = str, q++; *q != '"'; ++q, ++r) {
|
---|
| 2487 | if (*q == '\0') {
|
---|
| 2488 | bb_error_msg("improperly terminated string argument for %s",
|
---|
| 2489 | key);
|
---|
| 2490 | return 0;
|
---|
| 2491 | } else if (*q == '\\')
|
---|
| 2492 | switch (*++q) {
|
---|
| 2493 | case 'a':
|
---|
| 2494 | *r = '\a';
|
---|
| 2495 | break;
|
---|
| 2496 | case 'b':
|
---|
| 2497 | *r = '\b';
|
---|
| 2498 | break;
|
---|
| 2499 | case 'e':
|
---|
| 2500 | *r = '\033';
|
---|
| 2501 | break;
|
---|
| 2502 | case 'f':
|
---|
| 2503 | *r = '\f';
|
---|
| 2504 | break;
|
---|
| 2505 | case 'n':
|
---|
| 2506 | *r = '\n';
|
---|
| 2507 | break;
|
---|
| 2508 | case 'r':
|
---|
| 2509 | *r = '\r';
|
---|
| 2510 | break;
|
---|
| 2511 | case 't':
|
---|
| 2512 | *r = '\t';
|
---|
| 2513 | break;
|
---|
| 2514 |
|
---|
| 2515 | case '0':
|
---|
| 2516 | case '1':
|
---|
| 2517 | case '2':
|
---|
| 2518 | case '3':
|
---|
| 2519 | case '4':
|
---|
| 2520 | case '5':
|
---|
| 2521 | case '6':
|
---|
| 2522 | case '7':
|
---|
| 2523 | {
|
---|
| 2524 | int c = *q - '0';
|
---|
| 2525 | if (q[1] >= '0' && q[1] <= '7') {
|
---|
| 2526 | c = (c * 8) + *++q - '0';
|
---|
| 2527 | if (q[1] >= '0' && q[1] <= '7')
|
---|
| 2528 | c = (c * 8) + *++q - '0';
|
---|
| 2529 | }
|
---|
| 2530 | *r = c;
|
---|
| 2531 | }
|
---|
| 2532 | break;
|
---|
| 2533 |
|
---|
| 2534 | default:
|
---|
| 2535 | *r = *q;
|
---|
| 2536 | break;
|
---|
| 2537 | } else
|
---|
| 2538 | *r = *q;
|
---|
| 2539 | }
|
---|
| 2540 | *r = '\0';
|
---|
| 2541 | ++q;
|
---|
| 2542 | } else {
|
---|
| 2543 | char *r;
|
---|
| 2544 |
|
---|
| 2545 | /* In this case, the string is not quoted. We will break
|
---|
| 2546 | it using the coma (like for ints). If the user wants to
|
---|
| 2547 | include comas in a string, he just has to quote it */
|
---|
| 2548 |
|
---|
| 2549 | /* Search the next coma */
|
---|
| 2550 | r = strchr(q, ',');
|
---|
| 2551 |
|
---|
| 2552 | /* Found ? */
|
---|
| 2553 | if (r != (char *) NULL) {
|
---|
| 2554 | /* Recopy the current field */
|
---|
| 2555 | str = alloca(r - q + 1);
|
---|
| 2556 | memcpy(str, q, r - q);
|
---|
| 2557 |
|
---|
| 2558 | /* I don't know if it is useful, as the previous case
|
---|
| 2559 | doesn't nul terminate the string ??? */
|
---|
| 2560 | str[r - q] = '\0';
|
---|
| 2561 |
|
---|
| 2562 | /* Keep next fields */
|
---|
| 2563 | q = r;
|
---|
| 2564 | } else {
|
---|
| 2565 | /* last string */
|
---|
| 2566 | str = q;
|
---|
| 2567 | q = "";
|
---|
| 2568 | }
|
---|
| 2569 | }
|
---|
| 2570 |
|
---|
| 2571 | if (*p == 's') {
|
---|
| 2572 | /* Normal string */
|
---|
| 2573 | obj_string_patch(f, sym->secidx, loc - contents, str);
|
---|
| 2574 | loc += tgt_sizeof_char_p;
|
---|
| 2575 | } else {
|
---|
| 2576 | /* Array of chars (in fact, matrix !) */
|
---|
| 2577 | unsigned long charssize; /* size of each member */
|
---|
| 2578 |
|
---|
| 2579 | /* Get the size of each member */
|
---|
| 2580 | /* Probably we should do that outside the loop ? */
|
---|
| 2581 | if (!isdigit(*(p + 1))) {
|
---|
| 2582 | bb_error_msg("parameter type 'c' for %s must be followed by"
|
---|
| 2583 | " the maximum size", key);
|
---|
| 2584 | return 0;
|
---|
| 2585 | }
|
---|
| 2586 | charssize = strtoul(p + 1, (char **) NULL, 10);
|
---|
| 2587 |
|
---|
| 2588 | /* Check length */
|
---|
| 2589 | if (strlen(str) >= charssize) {
|
---|
| 2590 | bb_error_msg("string too long for %s (max %ld)", key,
|
---|
| 2591 | charssize - 1);
|
---|
| 2592 | return 0;
|
---|
| 2593 | }
|
---|
| 2594 |
|
---|
| 2595 | /* Copy to location */
|
---|
| 2596 | strcpy((char *) loc, str);
|
---|
| 2597 | loc += charssize;
|
---|
| 2598 | }
|
---|
| 2599 | } else {
|
---|
| 2600 | long v = strtoul(q, &q, 0);
|
---|
| 2601 | switch (*p) {
|
---|
| 2602 | case 'b':
|
---|
| 2603 | *loc++ = v;
|
---|
| 2604 | break;
|
---|
| 2605 | case 'h':
|
---|
| 2606 | *(short *) loc = v;
|
---|
| 2607 | loc += tgt_sizeof_short;
|
---|
| 2608 | break;
|
---|
| 2609 | case 'i':
|
---|
| 2610 | *(int *) loc = v;
|
---|
| 2611 | loc += tgt_sizeof_int;
|
---|
| 2612 | break;
|
---|
| 2613 | case 'l':
|
---|
| 2614 | *(long *) loc = v;
|
---|
| 2615 | loc += tgt_sizeof_long;
|
---|
| 2616 | break;
|
---|
| 2617 |
|
---|
| 2618 | default:
|
---|
| 2619 | bb_error_msg("unknown parameter type '%c' for %s", *p, key);
|
---|
| 2620 | return 0;
|
---|
| 2621 | }
|
---|
| 2622 | }
|
---|
| 2623 |
|
---|
| 2624 | retry_end_of_value:
|
---|
| 2625 | switch (*q) {
|
---|
| 2626 | case '\0':
|
---|
| 2627 | goto end_of_arg;
|
---|
| 2628 |
|
---|
| 2629 | case ' ':
|
---|
| 2630 | case '\t':
|
---|
| 2631 | case '\n':
|
---|
| 2632 | case '\r':
|
---|
| 2633 | ++q;
|
---|
| 2634 | goto retry_end_of_value;
|
---|
| 2635 |
|
---|
| 2636 | case ',':
|
---|
| 2637 | if (++n > max) {
|
---|
| 2638 | bb_error_msg("too many values for %s (max %d)", key, max);
|
---|
| 2639 | return 0;
|
---|
| 2640 | }
|
---|
| 2641 | ++q;
|
---|
| 2642 | break;
|
---|
| 2643 |
|
---|
| 2644 | default:
|
---|
| 2645 | bb_error_msg("invalid argument syntax for %s", key);
|
---|
| 2646 | return 0;
|
---|
| 2647 | }
|
---|
| 2648 | }
|
---|
| 2649 |
|
---|
| 2650 | end_of_arg:
|
---|
| 2651 | if (n < min) {
|
---|
| 2652 | bb_error_msg("too few values for %s (min %d)", key, min);
|
---|
| 2653 | return 0;
|
---|
| 2654 | }
|
---|
| 2655 |
|
---|
| 2656 | argc--, argv++;
|
---|
| 2657 | }
|
---|
| 2658 |
|
---|
| 2659 | return 1;
|
---|
| 2660 | }
|
---|
| 2661 |
|
---|
| 2662 | #ifdef CONFIG_FEATURE_INSMOD_VERSION_CHECKING
|
---|
| 2663 | static int new_is_module_checksummed(struct obj_file *f)
|
---|
| 2664 | {
|
---|
| 2665 | const char *p = get_modinfo_value(f, "using_checksums");
|
---|
| 2666 | if (p)
|
---|
| 2667 | return atoi(p);
|
---|
| 2668 | else
|
---|
| 2669 | return 0;
|
---|
| 2670 | }
|
---|
| 2671 |
|
---|
| 2672 | /* Get the module's kernel version in the canonical integer form. */
|
---|
| 2673 |
|
---|
| 2674 | static int
|
---|
| 2675 | new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
|
---|
| 2676 | {
|
---|
| 2677 | char *p, *q;
|
---|
| 2678 | int a, b, c;
|
---|
| 2679 |
|
---|
| 2680 | p = get_modinfo_value(f, "kernel_version");
|
---|
| 2681 | if (p == NULL)
|
---|
| 2682 | return -1;
|
---|
| 2683 | safe_strncpy(str, p, STRVERSIONLEN);
|
---|
| 2684 |
|
---|
| 2685 | a = strtoul(p, &p, 10);
|
---|
| 2686 | if (*p != '.')
|
---|
| 2687 | return -1;
|
---|
| 2688 | b = strtoul(p + 1, &p, 10);
|
---|
| 2689 | if (*p != '.')
|
---|
| 2690 | return -1;
|
---|
| 2691 | c = strtoul(p + 1, &q, 10);
|
---|
| 2692 | if (p + 1 == q)
|
---|
| 2693 | return -1;
|
---|
| 2694 |
|
---|
| 2695 | return a << 16 | b << 8 | c;
|
---|
| 2696 | }
|
---|
| 2697 |
|
---|
| 2698 | #endif /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */
|
---|
| 2699 |
|
---|
| 2700 |
|
---|
| 2701 | /* Fetch the loaded modules, and all currently exported symbols. */
|
---|
| 2702 |
|
---|
| 2703 | static int new_get_kernel_symbols(void)
|
---|
| 2704 | {
|
---|
| 2705 | char *module_names, *mn;
|
---|
| 2706 | struct external_module *modules, *m;
|
---|
| 2707 | struct new_module_symbol *syms, *s;
|
---|
| 2708 | size_t ret, bufsize, nmod, nsyms, i, j;
|
---|
| 2709 |
|
---|
| 2710 | /* Collect the loaded modules. */
|
---|
| 2711 |
|
---|
| 2712 | module_names = xmalloc(bufsize = 256);
|
---|
| 2713 | retry_modules_load:
|
---|
| 2714 | if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) {
|
---|
| 2715 | if (errno == ENOSPC && bufsize < ret) {
|
---|
| 2716 | module_names = xrealloc(module_names, bufsize = ret);
|
---|
| 2717 | goto retry_modules_load;
|
---|
| 2718 | }
|
---|
| 2719 | bb_perror_msg("QM_MODULES");
|
---|
| 2720 | return 0;
|
---|
| 2721 | }
|
---|
| 2722 |
|
---|
| 2723 | n_ext_modules = nmod = ret;
|
---|
| 2724 |
|
---|
| 2725 | /* Collect the modules' symbols. */
|
---|
| 2726 |
|
---|
| 2727 | if (nmod){
|
---|
| 2728 | ext_modules = modules = xmalloc(nmod * sizeof(*modules));
|
---|
| 2729 | memset(modules, 0, nmod * sizeof(*modules));
|
---|
| 2730 | for (i = 0, mn = module_names, m = modules;
|
---|
| 2731 | i < nmod; ++i, ++m, mn += strlen(mn) + 1) {
|
---|
| 2732 | struct new_module_info info;
|
---|
| 2733 |
|
---|
| 2734 | if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) {
|
---|
| 2735 | if (errno == ENOENT) {
|
---|
| 2736 | /* The module was removed out from underneath us. */
|
---|
| 2737 | continue;
|
---|
| 2738 | }
|
---|
| 2739 | bb_perror_msg("query_module: QM_INFO: %s", mn);
|
---|
| 2740 | return 0;
|
---|
| 2741 | }
|
---|
| 2742 |
|
---|
| 2743 | syms = xmalloc(bufsize = 1024);
|
---|
| 2744 | retry_mod_sym_load:
|
---|
| 2745 | if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) {
|
---|
| 2746 | switch (errno) {
|
---|
| 2747 | case ENOSPC:
|
---|
| 2748 | syms = xrealloc(syms, bufsize = ret);
|
---|
| 2749 | goto retry_mod_sym_load;
|
---|
| 2750 | case ENOENT:
|
---|
| 2751 | /* The module was removed out from underneath us. */
|
---|
| 2752 | continue;
|
---|
| 2753 | default:
|
---|
| 2754 | bb_perror_msg("query_module: QM_SYMBOLS: %s", mn);
|
---|
| 2755 | return 0;
|
---|
| 2756 | }
|
---|
| 2757 | }
|
---|
| 2758 | nsyms = ret;
|
---|
| 2759 |
|
---|
| 2760 | m->name = mn;
|
---|
| 2761 | m->addr = info.addr;
|
---|
| 2762 | m->nsyms = nsyms;
|
---|
| 2763 | m->syms = syms;
|
---|
| 2764 |
|
---|
| 2765 | for (j = 0, s = syms; j < nsyms; ++j, ++s) {
|
---|
| 2766 | s->name += (unsigned long) syms;
|
---|
| 2767 | }
|
---|
| 2768 | }
|
---|
| 2769 | }
|
---|
| 2770 |
|
---|
| 2771 | /* Collect the kernel's symbols. */
|
---|
| 2772 |
|
---|
| 2773 | syms = xmalloc(bufsize = 16 * 1024);
|
---|
| 2774 | retry_kern_sym_load:
|
---|
| 2775 | if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) {
|
---|
| 2776 | if (errno == ENOSPC && bufsize < ret) {
|
---|
| 2777 | syms = xrealloc(syms, bufsize = ret);
|
---|
| 2778 | goto retry_kern_sym_load;
|
---|
| 2779 | }
|
---|
| 2780 | bb_perror_msg("kernel: QM_SYMBOLS");
|
---|
| 2781 | return 0;
|
---|
| 2782 | }
|
---|
| 2783 | nksyms = nsyms = ret;
|
---|
| 2784 | ksyms = syms;
|
---|
| 2785 |
|
---|
| 2786 | for (j = 0, s = syms; j < nsyms; ++j, ++s) {
|
---|
| 2787 | s->name += (unsigned long) syms;
|
---|
| 2788 | }
|
---|
| 2789 | return 1;
|
---|
| 2790 | }
|
---|
| 2791 |
|
---|
| 2792 |
|
---|
| 2793 | /* Return the kernel symbol checksum version, or zero if not used. */
|
---|
| 2794 |
|
---|
| 2795 | static int new_is_kernel_checksummed(void)
|
---|
| 2796 | {
|
---|
| 2797 | struct new_module_symbol *s;
|
---|
| 2798 | size_t i;
|
---|
| 2799 |
|
---|
| 2800 | /* Using_Versions is not the first symbol, but it should be in there. */
|
---|
| 2801 |
|
---|
| 2802 | for (i = 0, s = ksyms; i < nksyms; ++i, ++s)
|
---|
| 2803 | if (strcmp((char *) s->name, "Using_Versions") == 0)
|
---|
| 2804 | return s->value;
|
---|
| 2805 |
|
---|
| 2806 | return 0;
|
---|
| 2807 | }
|
---|
| 2808 |
|
---|
| 2809 |
|
---|
| 2810 | static int new_create_this_module(struct obj_file *f, const char *m_name)
|
---|
| 2811 | {
|
---|
| 2812 | struct obj_section *sec;
|
---|
| 2813 |
|
---|
| 2814 | sec = obj_create_alloced_section_first(f, ".this", tgt_sizeof_long,
|
---|
| 2815 | sizeof(struct new_module));
|
---|
| 2816 | memset(sec->contents, 0, sizeof(struct new_module));
|
---|
| 2817 |
|
---|
| 2818 | obj_add_symbol(f, SPFX "__this_module", -1,
|
---|
| 2819 | ELF_ST_INFO(STB_LOCAL, STT_OBJECT), sec->idx, 0,
|
---|
| 2820 | sizeof(struct new_module));
|
---|
| 2821 |
|
---|
| 2822 | obj_string_patch(f, sec->idx, offsetof(struct new_module, name),
|
---|
| 2823 | m_name);
|
---|
| 2824 |
|
---|
| 2825 | return 1;
|
---|
| 2826 | }
|
---|
| 2827 |
|
---|
| 2828 | #ifdef CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
|
---|
| 2829 | /* add an entry to the __ksymtab section, creating it if necessary */
|
---|
| 2830 | static void new_add_ksymtab(struct obj_file *f, struct obj_symbol *sym)
|
---|
| 2831 | {
|
---|
| 2832 | struct obj_section *sec;
|
---|
| 2833 | ElfW(Addr) ofs;
|
---|
| 2834 |
|
---|
| 2835 | /* ensure __ksymtab is allocated, EXPORT_NOSYMBOLS creates a non-alloc section.
|
---|
| 2836 | * If __ksymtab is defined but not marked alloc, x out the first character
|
---|
| 2837 | * (no obj_delete routine) and create a new __ksymtab with the correct
|
---|
| 2838 | * characteristics.
|
---|
| 2839 | */
|
---|
| 2840 | sec = obj_find_section(f, "__ksymtab");
|
---|
| 2841 | if (sec && !(sec->header.sh_flags & SHF_ALLOC)) {
|
---|
| 2842 | *((char *)(sec->name)) = 'x'; /* override const */
|
---|
| 2843 | sec = NULL;
|
---|
| 2844 | }
|
---|
| 2845 | if (!sec)
|
---|
| 2846 | sec = obj_create_alloced_section(f, "__ksymtab",
|
---|
| 2847 | tgt_sizeof_void_p, 0);
|
---|
| 2848 | if (!sec)
|
---|
| 2849 | return;
|
---|
| 2850 | sec->header.sh_flags |= SHF_ALLOC;
|
---|
| 2851 | sec->header.sh_addralign = tgt_sizeof_void_p; /* Empty section might
|
---|
| 2852 | be byte-aligned */
|
---|
| 2853 | ofs = sec->header.sh_size;
|
---|
| 2854 | obj_symbol_patch(f, sec->idx, ofs, sym);
|
---|
| 2855 | obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, sym->name);
|
---|
| 2856 | obj_extend_section(sec, 2 * tgt_sizeof_char_p);
|
---|
| 2857 | }
|
---|
| 2858 | #endif /* CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
|
---|
| 2859 |
|
---|
| 2860 | static int new_create_module_ksymtab(struct obj_file *f)
|
---|
| 2861 | {
|
---|
| 2862 | struct obj_section *sec;
|
---|
| 2863 | int i;
|
---|
| 2864 |
|
---|
| 2865 | /* We must always add the module references. */
|
---|
| 2866 |
|
---|
| 2867 | if (n_ext_modules_used) {
|
---|
| 2868 | struct new_module_ref *dep;
|
---|
| 2869 | struct obj_symbol *tm;
|
---|
| 2870 |
|
---|
| 2871 | sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p,
|
---|
| 2872 | (sizeof(struct new_module_ref)
|
---|
| 2873 | * n_ext_modules_used));
|
---|
| 2874 | if (!sec)
|
---|
| 2875 | return 0;
|
---|
| 2876 |
|
---|
| 2877 | tm = obj_find_symbol(f, SPFX "__this_module");
|
---|
| 2878 | dep = (struct new_module_ref *) sec->contents;
|
---|
| 2879 | for (i = 0; i < n_ext_modules; ++i)
|
---|
| 2880 | if (ext_modules[i].used) {
|
---|
| 2881 | dep->dep = ext_modules[i].addr;
|
---|
| 2882 | obj_symbol_patch(f, sec->idx,
|
---|
| 2883 | (char *) &dep->ref - sec->contents, tm);
|
---|
| 2884 | dep->next_ref = 0;
|
---|
| 2885 | ++dep;
|
---|
| 2886 | }
|
---|
| 2887 | }
|
---|
| 2888 |
|
---|
| 2889 | if (flag_export && !obj_find_section(f, "__ksymtab")) {
|
---|
| 2890 | size_t nsyms;
|
---|
| 2891 | int *loaded;
|
---|
| 2892 |
|
---|
| 2893 | sec =
|
---|
| 2894 | obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p,
|
---|
| 2895 | 0);
|
---|
| 2896 |
|
---|
| 2897 | /* We don't want to export symbols residing in sections that
|
---|
| 2898 | aren't loaded. There are a number of these created so that
|
---|
| 2899 | we make sure certain module options don't appear twice. */
|
---|
| 2900 |
|
---|
| 2901 | loaded = alloca(sizeof(int) * (i = f->header.e_shnum));
|
---|
| 2902 | while (--i >= 0)
|
---|
| 2903 | loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0;
|
---|
| 2904 |
|
---|
| 2905 | for (nsyms = i = 0; i < HASH_BUCKETS; ++i) {
|
---|
| 2906 | struct obj_symbol *sym;
|
---|
| 2907 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 2908 | if (ELF_ST_BIND(sym->info) != STB_LOCAL
|
---|
| 2909 | && sym->secidx <= SHN_HIRESERVE
|
---|
| 2910 | && (sym->secidx >= SHN_LORESERVE
|
---|
| 2911 | || loaded[sym->secidx])) {
|
---|
| 2912 | ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p;
|
---|
| 2913 |
|
---|
| 2914 | obj_symbol_patch(f, sec->idx, ofs, sym);
|
---|
| 2915 | obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p,
|
---|
| 2916 | sym->name);
|
---|
| 2917 |
|
---|
| 2918 | nsyms++;
|
---|
| 2919 | }
|
---|
| 2920 | }
|
---|
| 2921 |
|
---|
| 2922 | obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p);
|
---|
| 2923 | }
|
---|
| 2924 |
|
---|
| 2925 | return 1;
|
---|
| 2926 | }
|
---|
| 2927 |
|
---|
| 2928 |
|
---|
| 2929 | static int
|
---|
| 2930 | new_init_module(const char *m_name, struct obj_file *f, unsigned long m_size)
|
---|
| 2931 | {
|
---|
| 2932 | struct new_module *module;
|
---|
| 2933 | struct obj_section *sec;
|
---|
| 2934 | void *image;
|
---|
| 2935 | int ret;
|
---|
| 2936 | tgt_long m_addr;
|
---|
| 2937 |
|
---|
| 2938 | sec = obj_find_section(f, ".this");
|
---|
| 2939 | if (!sec || !sec->contents) {
|
---|
| 2940 | bb_perror_msg_and_die("corrupt module %s?",m_name);
|
---|
| 2941 | }
|
---|
| 2942 | module = (struct new_module *) sec->contents;
|
---|
| 2943 | m_addr = sec->header.sh_addr;
|
---|
| 2944 |
|
---|
| 2945 | module->size_of_struct = sizeof(*module);
|
---|
| 2946 | module->size = m_size;
|
---|
| 2947 | module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0;
|
---|
| 2948 |
|
---|
| 2949 | sec = obj_find_section(f, "__ksymtab");
|
---|
| 2950 | if (sec && sec->header.sh_size) {
|
---|
| 2951 | module->syms = sec->header.sh_addr;
|
---|
| 2952 | module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p);
|
---|
| 2953 | }
|
---|
| 2954 |
|
---|
| 2955 | if (n_ext_modules_used) {
|
---|
| 2956 | sec = obj_find_section(f, ".kmodtab");
|
---|
| 2957 | module->deps = sec->header.sh_addr;
|
---|
| 2958 | module->ndeps = n_ext_modules_used;
|
---|
| 2959 | }
|
---|
| 2960 |
|
---|
| 2961 | module->init =
|
---|
| 2962 | obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module"));
|
---|
| 2963 | module->cleanup =
|
---|
| 2964 | obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module"));
|
---|
| 2965 |
|
---|
| 2966 | sec = obj_find_section(f, "__ex_table");
|
---|
| 2967 | if (sec) {
|
---|
| 2968 | module->ex_table_start = sec->header.sh_addr;
|
---|
| 2969 | module->ex_table_end = sec->header.sh_addr + sec->header.sh_size;
|
---|
| 2970 | }
|
---|
| 2971 |
|
---|
| 2972 | sec = obj_find_section(f, ".text.init");
|
---|
| 2973 | if (sec) {
|
---|
| 2974 | module->runsize = sec->header.sh_addr - m_addr;
|
---|
| 2975 | }
|
---|
| 2976 | sec = obj_find_section(f, ".data.init");
|
---|
| 2977 | if (sec) {
|
---|
| 2978 | if (!module->runsize ||
|
---|
| 2979 | module->runsize > sec->header.sh_addr - m_addr)
|
---|
| 2980 | module->runsize = sec->header.sh_addr - m_addr;
|
---|
| 2981 | }
|
---|
| 2982 | sec = obj_find_section(f, ARCHDATA_SEC_NAME);
|
---|
| 2983 | if (sec && sec->header.sh_size) {
|
---|
| 2984 | module->archdata_start = (void*)sec->header.sh_addr;
|
---|
| 2985 | module->archdata_end = module->archdata_start + sec->header.sh_size;
|
---|
| 2986 | }
|
---|
| 2987 | sec = obj_find_section(f, KALLSYMS_SEC_NAME);
|
---|
| 2988 | if (sec && sec->header.sh_size) {
|
---|
| 2989 | module->kallsyms_start = (void*)sec->header.sh_addr;
|
---|
| 2990 | module->kallsyms_end = module->kallsyms_start + sec->header.sh_size;
|
---|
| 2991 | }
|
---|
| 2992 |
|
---|
| 2993 | /* Whew! All of the initialization is complete. Collect the final
|
---|
| 2994 | module image and give it to the kernel. */
|
---|
| 2995 |
|
---|
| 2996 | image = xmalloc(m_size);
|
---|
| 2997 | obj_create_image(f, image);
|
---|
| 2998 |
|
---|
| 2999 | ret = init_module(m_name, (struct new_module *) image);
|
---|
| 3000 | if (ret)
|
---|
| 3001 | bb_perror_msg("init_module: %s", m_name);
|
---|
| 3002 |
|
---|
| 3003 | free(image);
|
---|
| 3004 |
|
---|
| 3005 | return ret == 0;
|
---|
| 3006 | }
|
---|
| 3007 |
|
---|
| 3008 |
|
---|
| 3009 | /*======================================================================*/
|
---|
| 3010 |
|
---|
| 3011 | static int
|
---|
| 3012 | obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
|
---|
| 3013 | const char *string)
|
---|
| 3014 | {
|
---|
| 3015 | struct obj_string_patch *p;
|
---|
| 3016 | struct obj_section *strsec;
|
---|
| 3017 | size_t len = strlen(string) + 1;
|
---|
| 3018 | char *loc;
|
---|
| 3019 |
|
---|
| 3020 | p = xmalloc(sizeof(*p));
|
---|
| 3021 | p->next = f->string_patches;
|
---|
| 3022 | p->reloc_secidx = secidx;
|
---|
| 3023 | p->reloc_offset = offset;
|
---|
| 3024 | f->string_patches = p;
|
---|
| 3025 |
|
---|
| 3026 | strsec = obj_find_section(f, ".kstrtab");
|
---|
| 3027 | if (strsec == NULL) {
|
---|
| 3028 | strsec = obj_create_alloced_section(f, ".kstrtab", 1, len);
|
---|
| 3029 | p->string_offset = 0;
|
---|
| 3030 | loc = strsec->contents;
|
---|
| 3031 | } else {
|
---|
| 3032 | p->string_offset = strsec->header.sh_size;
|
---|
| 3033 | loc = obj_extend_section(strsec, len);
|
---|
| 3034 | }
|
---|
| 3035 | memcpy(loc, string, len);
|
---|
| 3036 |
|
---|
| 3037 | return 1;
|
---|
| 3038 | }
|
---|
| 3039 |
|
---|
| 3040 | static int
|
---|
| 3041 | obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
|
---|
| 3042 | struct obj_symbol *sym)
|
---|
| 3043 | {
|
---|
| 3044 | struct obj_symbol_patch *p;
|
---|
| 3045 |
|
---|
| 3046 | p = xmalloc(sizeof(*p));
|
---|
| 3047 | p->next = f->symbol_patches;
|
---|
| 3048 | p->reloc_secidx = secidx;
|
---|
| 3049 | p->reloc_offset = offset;
|
---|
| 3050 | p->sym = sym;
|
---|
| 3051 | f->symbol_patches = p;
|
---|
| 3052 |
|
---|
| 3053 | return 1;
|
---|
| 3054 | }
|
---|
| 3055 |
|
---|
| 3056 | static int obj_check_undefineds(struct obj_file *f)
|
---|
| 3057 | {
|
---|
| 3058 | unsigned long i;
|
---|
| 3059 | int ret = 1;
|
---|
| 3060 |
|
---|
| 3061 | for (i = 0; i < HASH_BUCKETS; ++i) {
|
---|
| 3062 | struct obj_symbol *sym;
|
---|
| 3063 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 3064 | if (sym->secidx == SHN_UNDEF) {
|
---|
| 3065 | if (ELF_ST_BIND(sym->info) == STB_WEAK) {
|
---|
| 3066 | sym->secidx = SHN_ABS;
|
---|
| 3067 | sym->value = 0;
|
---|
| 3068 | } else {
|
---|
| 3069 | if (!flag_quiet) {
|
---|
| 3070 | bb_error_msg("unresolved symbol %s", sym->name);
|
---|
| 3071 | }
|
---|
| 3072 | ret = 0;
|
---|
| 3073 | }
|
---|
| 3074 | }
|
---|
| 3075 | }
|
---|
| 3076 |
|
---|
| 3077 | return ret;
|
---|
| 3078 | }
|
---|
| 3079 |
|
---|
| 3080 | static void obj_allocate_commons(struct obj_file *f)
|
---|
| 3081 | {
|
---|
| 3082 | struct common_entry {
|
---|
| 3083 | struct common_entry *next;
|
---|
| 3084 | struct obj_symbol *sym;
|
---|
| 3085 | } *common_head = NULL;
|
---|
| 3086 |
|
---|
| 3087 | unsigned long i;
|
---|
| 3088 |
|
---|
| 3089 | for (i = 0; i < HASH_BUCKETS; ++i) {
|
---|
| 3090 | struct obj_symbol *sym;
|
---|
| 3091 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 3092 | if (sym->secidx == SHN_COMMON) {
|
---|
| 3093 | /* Collect all COMMON symbols and sort them by size so as to
|
---|
| 3094 | minimize space wasted by alignment requirements. */
|
---|
| 3095 | {
|
---|
| 3096 | struct common_entry **p, *n;
|
---|
| 3097 | for (p = &common_head; *p; p = &(*p)->next)
|
---|
| 3098 | if (sym->size <= (*p)->sym->size)
|
---|
| 3099 | break;
|
---|
| 3100 |
|
---|
| 3101 | n = alloca(sizeof(*n));
|
---|
| 3102 | n->next = *p;
|
---|
| 3103 | n->sym = sym;
|
---|
| 3104 | *p = n;
|
---|
| 3105 | }
|
---|
| 3106 | }
|
---|
| 3107 | }
|
---|
| 3108 |
|
---|
| 3109 | for (i = 1; i < f->local_symtab_size; ++i) {
|
---|
| 3110 | struct obj_symbol *sym = f->local_symtab[i];
|
---|
| 3111 | if (sym && sym->secidx == SHN_COMMON) {
|
---|
| 3112 | struct common_entry **p, *n;
|
---|
| 3113 | for (p = &common_head; *p; p = &(*p)->next)
|
---|
| 3114 | if (sym == (*p)->sym)
|
---|
| 3115 | break;
|
---|
| 3116 | else if (sym->size < (*p)->sym->size) {
|
---|
| 3117 | n = alloca(sizeof(*n));
|
---|
| 3118 | n->next = *p;
|
---|
| 3119 | n->sym = sym;
|
---|
| 3120 | *p = n;
|
---|
| 3121 | break;
|
---|
| 3122 | }
|
---|
| 3123 | }
|
---|
| 3124 | }
|
---|
| 3125 |
|
---|
| 3126 | if (common_head) {
|
---|
| 3127 | /* Find the bss section. */
|
---|
| 3128 | for (i = 0; i < f->header.e_shnum; ++i)
|
---|
| 3129 | if (f->sections[i]->header.sh_type == SHT_NOBITS)
|
---|
| 3130 | break;
|
---|
| 3131 |
|
---|
| 3132 | /* If for some reason there hadn't been one, create one. */
|
---|
| 3133 | if (i == f->header.e_shnum) {
|
---|
| 3134 | struct obj_section *sec;
|
---|
| 3135 |
|
---|
| 3136 | f->sections = xrealloc(f->sections, (i + 1) * sizeof(sec));
|
---|
| 3137 | f->sections[i] = sec = arch_new_section();
|
---|
| 3138 | f->header.e_shnum = i + 1;
|
---|
| 3139 |
|
---|
| 3140 | memset(sec, 0, sizeof(*sec));
|
---|
| 3141 | sec->header.sh_type = SHT_PROGBITS;
|
---|
| 3142 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
|
---|
| 3143 | sec->name = ".bss";
|
---|
| 3144 | sec->idx = i;
|
---|
| 3145 | }
|
---|
| 3146 |
|
---|
| 3147 | /* Allocate the COMMONS. */
|
---|
| 3148 | {
|
---|
| 3149 | ElfW(Addr) bss_size = f->sections[i]->header.sh_size;
|
---|
| 3150 | ElfW(Addr) max_align = f->sections[i]->header.sh_addralign;
|
---|
| 3151 | struct common_entry *c;
|
---|
| 3152 |
|
---|
| 3153 | for (c = common_head; c; c = c->next) {
|
---|
| 3154 | ElfW(Addr) align = c->sym->value;
|
---|
| 3155 |
|
---|
| 3156 | if (align > max_align)
|
---|
| 3157 | max_align = align;
|
---|
| 3158 | if (bss_size & (align - 1))
|
---|
| 3159 | bss_size = (bss_size | (align - 1)) + 1;
|
---|
| 3160 |
|
---|
| 3161 | c->sym->secidx = i;
|
---|
| 3162 | c->sym->value = bss_size;
|
---|
| 3163 |
|
---|
| 3164 | bss_size += c->sym->size;
|
---|
| 3165 | }
|
---|
| 3166 |
|
---|
| 3167 | f->sections[i]->header.sh_size = bss_size;
|
---|
| 3168 | f->sections[i]->header.sh_addralign = max_align;
|
---|
| 3169 | }
|
---|
| 3170 | }
|
---|
| 3171 |
|
---|
| 3172 | /* For the sake of patch relocation and parameter initialization,
|
---|
| 3173 | allocate zeroed data for NOBITS sections now. Note that after
|
---|
| 3174 | this we cannot assume NOBITS are really empty. */
|
---|
| 3175 | for (i = 0; i < f->header.e_shnum; ++i) {
|
---|
| 3176 | struct obj_section *s = f->sections[i];
|
---|
| 3177 | if (s->header.sh_type == SHT_NOBITS) {
|
---|
| 3178 | if (s->header.sh_size != 0)
|
---|
| 3179 | s->contents = memset(xmalloc(s->header.sh_size),
|
---|
| 3180 | 0, s->header.sh_size);
|
---|
| 3181 | else
|
---|
| 3182 | s->contents = NULL;
|
---|
| 3183 |
|
---|
| 3184 | s->header.sh_type = SHT_PROGBITS;
|
---|
| 3185 | }
|
---|
| 3186 | }
|
---|
| 3187 | }
|
---|
| 3188 |
|
---|
| 3189 | static unsigned long obj_load_size(struct obj_file *f)
|
---|
| 3190 | {
|
---|
| 3191 | unsigned long dot = 0;
|
---|
| 3192 | struct obj_section *sec;
|
---|
| 3193 |
|
---|
| 3194 | /* Finalize the positions of the sections relative to one another. */
|
---|
| 3195 |
|
---|
| 3196 | for (sec = f->load_order; sec; sec = sec->load_next) {
|
---|
| 3197 | ElfW(Addr) align;
|
---|
| 3198 |
|
---|
| 3199 | align = sec->header.sh_addralign;
|
---|
| 3200 | if (align && (dot & (align - 1)))
|
---|
| 3201 | dot = (dot | (align - 1)) + 1;
|
---|
| 3202 |
|
---|
| 3203 | sec->header.sh_addr = dot;
|
---|
| 3204 | dot += sec->header.sh_size;
|
---|
| 3205 | }
|
---|
| 3206 |
|
---|
| 3207 | return dot;
|
---|
| 3208 | }
|
---|
| 3209 |
|
---|
| 3210 | static int obj_relocate(struct obj_file *f, ElfW(Addr) base)
|
---|
| 3211 | {
|
---|
| 3212 | int i, n = f->header.e_shnum;
|
---|
| 3213 | int ret = 1;
|
---|
| 3214 |
|
---|
| 3215 | /* Finalize the addresses of the sections. */
|
---|
| 3216 |
|
---|
| 3217 | f->baseaddr = base;
|
---|
| 3218 | for (i = 0; i < n; ++i)
|
---|
| 3219 | f->sections[i]->header.sh_addr += base;
|
---|
| 3220 |
|
---|
| 3221 | /* And iterate over all of the relocations. */
|
---|
| 3222 |
|
---|
| 3223 | for (i = 0; i < n; ++i) {
|
---|
| 3224 | struct obj_section *relsec, *symsec, *targsec, *strsec;
|
---|
| 3225 | ElfW(RelM) * rel, *relend;
|
---|
| 3226 | ElfW(Sym) * symtab;
|
---|
| 3227 | const char *strtab;
|
---|
| 3228 |
|
---|
| 3229 | relsec = f->sections[i];
|
---|
| 3230 | if (relsec->header.sh_type != SHT_RELM)
|
---|
| 3231 | continue;
|
---|
| 3232 |
|
---|
| 3233 | symsec = f->sections[relsec->header.sh_link];
|
---|
| 3234 | targsec = f->sections[relsec->header.sh_info];
|
---|
| 3235 | strsec = f->sections[symsec->header.sh_link];
|
---|
| 3236 |
|
---|
| 3237 | rel = (ElfW(RelM) *) relsec->contents;
|
---|
| 3238 | relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM)));
|
---|
| 3239 | symtab = (ElfW(Sym) *) symsec->contents;
|
---|
| 3240 | strtab = (const char *) strsec->contents;
|
---|
| 3241 |
|
---|
| 3242 | for (; rel < relend; ++rel) {
|
---|
| 3243 | ElfW(Addr) value = 0;
|
---|
| 3244 | struct obj_symbol *intsym = NULL;
|
---|
| 3245 | unsigned long symndx;
|
---|
| 3246 | ElfW(Sym) * extsym = 0;
|
---|
| 3247 | const char *errmsg;
|
---|
| 3248 |
|
---|
| 3249 | /* Attempt to find a value to use for this relocation. */
|
---|
| 3250 |
|
---|
| 3251 | symndx = ELF_R_SYM(rel->r_info);
|
---|
| 3252 | if (symndx) {
|
---|
| 3253 | /* Note we've already checked for undefined symbols. */
|
---|
| 3254 |
|
---|
| 3255 | extsym = &symtab[symndx];
|
---|
| 3256 | if (ELF_ST_BIND(extsym->st_info) == STB_LOCAL) {
|
---|
| 3257 | /* Local symbols we look up in the local table to be sure
|
---|
| 3258 | we get the one that is really intended. */
|
---|
| 3259 | intsym = f->local_symtab[symndx];
|
---|
| 3260 | } else {
|
---|
| 3261 | /* Others we look up in the hash table. */
|
---|
| 3262 | const char *name;
|
---|
| 3263 | if (extsym->st_name)
|
---|
| 3264 | name = strtab + extsym->st_name;
|
---|
| 3265 | else
|
---|
| 3266 | name = f->sections[extsym->st_shndx]->name;
|
---|
| 3267 | intsym = obj_find_symbol(f, name);
|
---|
| 3268 | }
|
---|
| 3269 |
|
---|
| 3270 | value = obj_symbol_final_value(f, intsym);
|
---|
| 3271 | intsym->referenced = 1;
|
---|
| 3272 | }
|
---|
| 3273 | #if SHT_RELM == SHT_RELA
|
---|
| 3274 | #if defined(__alpha__) && defined(AXP_BROKEN_GAS)
|
---|
| 3275 | /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */
|
---|
| 3276 | if (!extsym || !extsym->st_name ||
|
---|
| 3277 | ELF_ST_BIND(extsym->st_info) != STB_LOCAL)
|
---|
| 3278 | #endif
|
---|
| 3279 | value += rel->r_addend;
|
---|
| 3280 | #endif
|
---|
| 3281 |
|
---|
| 3282 | /* Do it! */
|
---|
| 3283 | switch (arch_apply_relocation
|
---|
| 3284 | (f, targsec, symsec, intsym, rel, value)) {
|
---|
| 3285 | case obj_reloc_ok:
|
---|
| 3286 | break;
|
---|
| 3287 |
|
---|
| 3288 | case obj_reloc_overflow:
|
---|
| 3289 | errmsg = "Relocation overflow";
|
---|
| 3290 | goto bad_reloc;
|
---|
| 3291 | case obj_reloc_dangerous:
|
---|
| 3292 | errmsg = "Dangerous relocation";
|
---|
| 3293 | goto bad_reloc;
|
---|
| 3294 | case obj_reloc_unhandled:
|
---|
| 3295 | errmsg = "Unhandled relocation";
|
---|
| 3296 | bad_reloc:
|
---|
| 3297 | if (extsym) {
|
---|
| 3298 | bb_error_msg("%s of type %ld for %s", errmsg,
|
---|
| 3299 | (long) ELF_R_TYPE(rel->r_info),
|
---|
| 3300 | strtab + extsym->st_name);
|
---|
| 3301 | } else {
|
---|
| 3302 | bb_error_msg("%s of type %ld", errmsg,
|
---|
| 3303 | (long) ELF_R_TYPE(rel->r_info));
|
---|
| 3304 | }
|
---|
| 3305 | ret = 0;
|
---|
| 3306 | break;
|
---|
| 3307 | }
|
---|
| 3308 | }
|
---|
| 3309 | }
|
---|
| 3310 |
|
---|
| 3311 | /* Finally, take care of the patches. */
|
---|
| 3312 |
|
---|
| 3313 | if (f->string_patches) {
|
---|
| 3314 | struct obj_string_patch *p;
|
---|
| 3315 | struct obj_section *strsec;
|
---|
| 3316 | ElfW(Addr) strsec_base;
|
---|
| 3317 | strsec = obj_find_section(f, ".kstrtab");
|
---|
| 3318 | strsec_base = strsec->header.sh_addr;
|
---|
| 3319 |
|
---|
| 3320 | for (p = f->string_patches; p; p = p->next) {
|
---|
| 3321 | struct obj_section *targsec = f->sections[p->reloc_secidx];
|
---|
| 3322 | *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
|
---|
| 3323 | = strsec_base + p->string_offset;
|
---|
| 3324 | }
|
---|
| 3325 | }
|
---|
| 3326 |
|
---|
| 3327 | if (f->symbol_patches) {
|
---|
| 3328 | struct obj_symbol_patch *p;
|
---|
| 3329 |
|
---|
| 3330 | for (p = f->symbol_patches; p; p = p->next) {
|
---|
| 3331 | struct obj_section *targsec = f->sections[p->reloc_secidx];
|
---|
| 3332 | *(ElfW(Addr) *) (targsec->contents + p->reloc_offset)
|
---|
| 3333 | = obj_symbol_final_value(f, p->sym);
|
---|
| 3334 | }
|
---|
| 3335 | }
|
---|
| 3336 |
|
---|
| 3337 | return ret;
|
---|
| 3338 | }
|
---|
| 3339 |
|
---|
| 3340 | static int obj_create_image(struct obj_file *f, char *image)
|
---|
| 3341 | {
|
---|
| 3342 | struct obj_section *sec;
|
---|
| 3343 | ElfW(Addr) base = f->baseaddr;
|
---|
| 3344 |
|
---|
| 3345 | for (sec = f->load_order; sec; sec = sec->load_next) {
|
---|
| 3346 | char *secimg;
|
---|
| 3347 |
|
---|
| 3348 | if (sec->contents == 0 || sec->header.sh_size == 0)
|
---|
| 3349 | continue;
|
---|
| 3350 |
|
---|
| 3351 | secimg = image + (sec->header.sh_addr - base);
|
---|
| 3352 |
|
---|
| 3353 | /* Note that we allocated data for NOBITS sections earlier. */
|
---|
| 3354 | memcpy(secimg, sec->contents, sec->header.sh_size);
|
---|
| 3355 | }
|
---|
| 3356 |
|
---|
| 3357 | return 1;
|
---|
| 3358 | }
|
---|
| 3359 |
|
---|
| 3360 | /*======================================================================*/
|
---|
| 3361 |
|
---|
| 3362 | static struct obj_file *obj_load(FILE * fp, int loadprogbits)
|
---|
| 3363 | {
|
---|
| 3364 | struct obj_file *f;
|
---|
| 3365 | ElfW(Shdr) * section_headers;
|
---|
| 3366 | int shnum, i;
|
---|
| 3367 | char *shstrtab;
|
---|
| 3368 |
|
---|
| 3369 | /* Read the file header. */
|
---|
| 3370 |
|
---|
| 3371 | f = arch_new_file();
|
---|
| 3372 | memset(f, 0, sizeof(*f));
|
---|
| 3373 | f->symbol_cmp = strcmp;
|
---|
| 3374 | f->symbol_hash = obj_elf_hash;
|
---|
| 3375 | f->load_order_search_start = &f->load_order;
|
---|
| 3376 |
|
---|
| 3377 | fseek(fp, 0, SEEK_SET);
|
---|
| 3378 | if (fread(&f->header, sizeof(f->header), 1, fp) != 1) {
|
---|
| 3379 | bb_perror_msg("error reading ELF header");
|
---|
| 3380 | return NULL;
|
---|
| 3381 | }
|
---|
| 3382 |
|
---|
| 3383 | if (f->header.e_ident[EI_MAG0] != ELFMAG0
|
---|
| 3384 | || f->header.e_ident[EI_MAG1] != ELFMAG1
|
---|
| 3385 | || f->header.e_ident[EI_MAG2] != ELFMAG2
|
---|
| 3386 | || f->header.e_ident[EI_MAG3] != ELFMAG3) {
|
---|
| 3387 | bb_error_msg("not an ELF file");
|
---|
| 3388 | return NULL;
|
---|
| 3389 | }
|
---|
| 3390 | if (f->header.e_ident[EI_CLASS] != ELFCLASSM
|
---|
| 3391 | || f->header.e_ident[EI_DATA] != (BB_BIG_ENDIAN
|
---|
| 3392 | ? ELFDATA2MSB : ELFDATA2LSB)
|
---|
| 3393 | || f->header.e_ident[EI_VERSION] != EV_CURRENT
|
---|
| 3394 | || !MATCH_MACHINE(f->header.e_machine)) {
|
---|
| 3395 | bb_error_msg("ELF file not for this architecture");
|
---|
| 3396 | return NULL;
|
---|
| 3397 | }
|
---|
| 3398 | if (f->header.e_type != ET_REL) {
|
---|
| 3399 | bb_error_msg("ELF file not a relocatable object");
|
---|
| 3400 | return NULL;
|
---|
| 3401 | }
|
---|
| 3402 |
|
---|
| 3403 | /* Read the section headers. */
|
---|
| 3404 |
|
---|
| 3405 | if (f->header.e_shentsize != sizeof(ElfW(Shdr))) {
|
---|
| 3406 | bb_error_msg("section header size mismatch: %lu != %lu",
|
---|
| 3407 | (unsigned long) f->header.e_shentsize,
|
---|
| 3408 | (unsigned long) sizeof(ElfW(Shdr)));
|
---|
| 3409 | return NULL;
|
---|
| 3410 | }
|
---|
| 3411 |
|
---|
| 3412 | shnum = f->header.e_shnum;
|
---|
| 3413 | f->sections = xmalloc(sizeof(struct obj_section *) * shnum);
|
---|
| 3414 | memset(f->sections, 0, sizeof(struct obj_section *) * shnum);
|
---|
| 3415 |
|
---|
| 3416 | section_headers = alloca(sizeof(ElfW(Shdr)) * shnum);
|
---|
| 3417 | fseek(fp, f->header.e_shoff, SEEK_SET);
|
---|
| 3418 | if (fread(section_headers, sizeof(ElfW(Shdr)), shnum, fp) != shnum) {
|
---|
| 3419 | bb_perror_msg("error reading ELF section headers");
|
---|
| 3420 | return NULL;
|
---|
| 3421 | }
|
---|
| 3422 |
|
---|
| 3423 | /* Read the section data. */
|
---|
| 3424 |
|
---|
| 3425 | for (i = 0; i < shnum; ++i) {
|
---|
| 3426 | struct obj_section *sec;
|
---|
| 3427 |
|
---|
| 3428 | f->sections[i] = sec = arch_new_section();
|
---|
| 3429 | memset(sec, 0, sizeof(*sec));
|
---|
| 3430 |
|
---|
| 3431 | sec->header = section_headers[i];
|
---|
| 3432 | sec->idx = i;
|
---|
| 3433 |
|
---|
| 3434 | if(sec->header.sh_size) switch (sec->header.sh_type) {
|
---|
| 3435 | case SHT_NULL:
|
---|
| 3436 | case SHT_NOTE:
|
---|
| 3437 | case SHT_NOBITS:
|
---|
| 3438 | /* ignore */
|
---|
| 3439 | break;
|
---|
| 3440 |
|
---|
| 3441 | case SHT_PROGBITS:
|
---|
| 3442 | #if LOADBITS
|
---|
| 3443 | if (!loadprogbits) {
|
---|
| 3444 | sec->contents = NULL;
|
---|
| 3445 | break;
|
---|
| 3446 | }
|
---|
| 3447 | #endif
|
---|
| 3448 | case SHT_SYMTAB:
|
---|
| 3449 | case SHT_STRTAB:
|
---|
| 3450 | case SHT_RELM:
|
---|
| 3451 | if (sec->header.sh_size > 0) {
|
---|
| 3452 | sec->contents = xmalloc(sec->header.sh_size);
|
---|
| 3453 | fseek(fp, sec->header.sh_offset, SEEK_SET);
|
---|
| 3454 | if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) {
|
---|
| 3455 | bb_perror_msg("error reading ELF section data");
|
---|
| 3456 | return NULL;
|
---|
| 3457 | }
|
---|
| 3458 | } else {
|
---|
| 3459 | sec->contents = NULL;
|
---|
| 3460 | }
|
---|
| 3461 | break;
|
---|
| 3462 |
|
---|
| 3463 | #if SHT_RELM == SHT_REL
|
---|
| 3464 | case SHT_RELA:
|
---|
| 3465 | bb_error_msg("RELA relocations not supported on this architecture");
|
---|
| 3466 | return NULL;
|
---|
| 3467 | #else
|
---|
| 3468 | case SHT_REL:
|
---|
| 3469 | bb_error_msg("REL relocations not supported on this architecture");
|
---|
| 3470 | return NULL;
|
---|
| 3471 | #endif
|
---|
| 3472 |
|
---|
| 3473 | default:
|
---|
| 3474 | if (sec->header.sh_type >= SHT_LOPROC) {
|
---|
| 3475 | /* Assume processor specific section types are debug
|
---|
| 3476 | info and can safely be ignored. If this is ever not
|
---|
| 3477 | the case (Hello MIPS?), don't put ifdefs here but
|
---|
| 3478 | create an arch_load_proc_section(). */
|
---|
| 3479 | break;
|
---|
| 3480 | }
|
---|
| 3481 |
|
---|
| 3482 | bb_error_msg("can't handle sections of type %ld",
|
---|
| 3483 | (long) sec->header.sh_type);
|
---|
| 3484 | return NULL;
|
---|
| 3485 | }
|
---|
| 3486 | }
|
---|
| 3487 |
|
---|
| 3488 | /* Do what sort of interpretation as needed by each section. */
|
---|
| 3489 |
|
---|
| 3490 | shstrtab = f->sections[f->header.e_shstrndx]->contents;
|
---|
| 3491 |
|
---|
| 3492 | for (i = 0; i < shnum; ++i) {
|
---|
| 3493 | struct obj_section *sec = f->sections[i];
|
---|
| 3494 | sec->name = shstrtab + sec->header.sh_name;
|
---|
| 3495 | }
|
---|
| 3496 |
|
---|
| 3497 | for (i = 0; i < shnum; ++i) {
|
---|
| 3498 | struct obj_section *sec = f->sections[i];
|
---|
| 3499 |
|
---|
| 3500 | /* .modinfo should be contents only but gcc has no attribute for that.
|
---|
| 3501 | * The kernel may have marked .modinfo as ALLOC, ignore this bit.
|
---|
| 3502 | */
|
---|
| 3503 | if (strcmp(sec->name, ".modinfo") == 0)
|
---|
| 3504 | sec->header.sh_flags &= ~SHF_ALLOC;
|
---|
| 3505 |
|
---|
| 3506 | if (sec->header.sh_flags & SHF_ALLOC)
|
---|
| 3507 | obj_insert_section_load_order(f, sec);
|
---|
| 3508 |
|
---|
| 3509 | switch (sec->header.sh_type) {
|
---|
| 3510 | case SHT_SYMTAB:
|
---|
| 3511 | {
|
---|
| 3512 | unsigned long nsym, j;
|
---|
| 3513 | char *strtab;
|
---|
| 3514 | ElfW(Sym) * sym;
|
---|
| 3515 |
|
---|
| 3516 | if (sec->header.sh_entsize != sizeof(ElfW(Sym))) {
|
---|
| 3517 | bb_error_msg("symbol size mismatch: %lu != %lu",
|
---|
| 3518 | (unsigned long) sec->header.sh_entsize,
|
---|
| 3519 | (unsigned long) sizeof(ElfW(Sym)));
|
---|
| 3520 | return NULL;
|
---|
| 3521 | }
|
---|
| 3522 |
|
---|
| 3523 | nsym = sec->header.sh_size / sizeof(ElfW(Sym));
|
---|
| 3524 | strtab = f->sections[sec->header.sh_link]->contents;
|
---|
| 3525 | sym = (ElfW(Sym) *) sec->contents;
|
---|
| 3526 |
|
---|
| 3527 | /* Allocate space for a table of local symbols. */
|
---|
| 3528 | j = f->local_symtab_size = sec->header.sh_info;
|
---|
| 3529 | f->local_symtab = xcalloc(j, sizeof(struct obj_symbol *));
|
---|
| 3530 |
|
---|
| 3531 | /* Insert all symbols into the hash table. */
|
---|
| 3532 | for (j = 1, ++sym; j < nsym; ++j, ++sym) {
|
---|
| 3533 | ElfW(Addr) val = sym->st_value;
|
---|
| 3534 | const char *name;
|
---|
| 3535 | if (sym->st_name)
|
---|
| 3536 | name = strtab + sym->st_name;
|
---|
| 3537 | else if (sym->st_shndx < shnum)
|
---|
| 3538 | name = f->sections[sym->st_shndx]->name;
|
---|
| 3539 | else
|
---|
| 3540 | continue;
|
---|
| 3541 |
|
---|
| 3542 | #if defined(__SH5__)
|
---|
| 3543 | /*
|
---|
| 3544 | * For sh64 it is possible that the target of a branch
|
---|
| 3545 | * requires a mode switch (32 to 16 and back again).
|
---|
| 3546 | *
|
---|
| 3547 | * This is implied by the lsb being set in the target
|
---|
| 3548 | * address for SHmedia mode and clear for SHcompact.
|
---|
| 3549 | */
|
---|
| 3550 | val |= sym->st_other & 4;
|
---|
| 3551 | #endif
|
---|
| 3552 |
|
---|
| 3553 | obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx,
|
---|
| 3554 | val, sym->st_size);
|
---|
| 3555 | }
|
---|
| 3556 | }
|
---|
| 3557 | break;
|
---|
| 3558 |
|
---|
| 3559 | case SHT_RELM:
|
---|
| 3560 | if (sec->header.sh_entsize != sizeof(ElfW(RelM))) {
|
---|
| 3561 | bb_error_msg("relocation entry size mismatch: %lu != %lu",
|
---|
| 3562 | (unsigned long) sec->header.sh_entsize,
|
---|
| 3563 | (unsigned long) sizeof(ElfW(RelM)));
|
---|
| 3564 | return NULL;
|
---|
| 3565 | }
|
---|
| 3566 | break;
|
---|
| 3567 | /* XXX Relocation code from modutils-2.3.19 is not here.
|
---|
| 3568 | * Why? That's about 20 lines of code from obj/obj_load.c,
|
---|
| 3569 | * which gets done in a second pass through the sections.
|
---|
| 3570 | * This BusyBox insmod does similar work in obj_relocate(). */
|
---|
| 3571 | }
|
---|
| 3572 | }
|
---|
| 3573 |
|
---|
| 3574 | return f;
|
---|
| 3575 | }
|
---|
| 3576 |
|
---|
| 3577 | #ifdef CONFIG_FEATURE_INSMOD_LOADINKMEM
|
---|
| 3578 | /*
|
---|
| 3579 | * load the unloaded sections directly into the memory allocated by
|
---|
| 3580 | * kernel for the module
|
---|
| 3581 | */
|
---|
| 3582 |
|
---|
| 3583 | static int obj_load_progbits(FILE * fp, struct obj_file* f, char* imagebase)
|
---|
| 3584 | {
|
---|
| 3585 | ElfW(Addr) base = f->baseaddr;
|
---|
| 3586 | struct obj_section* sec;
|
---|
| 3587 |
|
---|
| 3588 | for (sec = f->load_order; sec; sec = sec->load_next) {
|
---|
| 3589 |
|
---|
| 3590 | /* section already loaded? */
|
---|
| 3591 | if (sec->contents != NULL)
|
---|
| 3592 | continue;
|
---|
| 3593 |
|
---|
| 3594 | if (sec->header.sh_size == 0)
|
---|
| 3595 | continue;
|
---|
| 3596 |
|
---|
| 3597 | sec->contents = imagebase + (sec->header.sh_addr - base);
|
---|
| 3598 | fseek(fp, sec->header.sh_offset, SEEK_SET);
|
---|
| 3599 | if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) {
|
---|
| 3600 | bb_error_msg("error reading ELF section data: %s\n", strerror(errno));
|
---|
| 3601 | return 0;
|
---|
| 3602 | }
|
---|
| 3603 |
|
---|
| 3604 | }
|
---|
| 3605 | return 1;
|
---|
| 3606 | }
|
---|
| 3607 | #endif
|
---|
| 3608 |
|
---|
| 3609 | static void hide_special_symbols(struct obj_file *f)
|
---|
| 3610 | {
|
---|
| 3611 | static const char *const specials[] = {
|
---|
| 3612 | SPFX "cleanup_module",
|
---|
| 3613 | SPFX "init_module",
|
---|
| 3614 | SPFX "kernel_version",
|
---|
| 3615 | NULL
|
---|
| 3616 | };
|
---|
| 3617 |
|
---|
| 3618 | struct obj_symbol *sym;
|
---|
| 3619 | const char *const *p;
|
---|
| 3620 |
|
---|
| 3621 | for (p = specials; *p; ++p)
|
---|
| 3622 | if ((sym = obj_find_symbol(f, *p)) != NULL)
|
---|
| 3623 | sym->info =
|
---|
| 3624 | ELF_ST_INFO(STB_LOCAL, ELF_ST_TYPE(sym->info));
|
---|
| 3625 | }
|
---|
| 3626 |
|
---|
| 3627 |
|
---|
| 3628 | #ifdef CONFIG_FEATURE_CHECK_TAINTED_MODULE
|
---|
| 3629 | static int obj_gpl_license(struct obj_file *f, const char **license)
|
---|
| 3630 | {
|
---|
| 3631 | struct obj_section *sec;
|
---|
| 3632 | /* This list must match *exactly* the list of allowable licenses in
|
---|
| 3633 | * linux/include/linux/module.h. Checking for leading "GPL" will not
|
---|
| 3634 | * work, somebody will use "GPL sucks, this is proprietary".
|
---|
| 3635 | */
|
---|
| 3636 | static const char * const gpl_licenses[] = {
|
---|
| 3637 | "GPL",
|
---|
| 3638 | "GPL v2",
|
---|
| 3639 | "GPL and additional rights",
|
---|
| 3640 | "Dual BSD/GPL",
|
---|
| 3641 | "Dual MPL/GPL",
|
---|
| 3642 | };
|
---|
| 3643 |
|
---|
| 3644 | if ((sec = obj_find_section(f, ".modinfo"))) {
|
---|
| 3645 | const char *value, *ptr, *endptr;
|
---|
| 3646 | ptr = sec->contents;
|
---|
| 3647 | endptr = ptr + sec->header.sh_size;
|
---|
| 3648 | while (ptr < endptr) {
|
---|
| 3649 | if ((value = strchr(ptr, '=')) && strncmp(ptr, "license", value-ptr) == 0) {
|
---|
| 3650 | int i;
|
---|
| 3651 | if (license)
|
---|
| 3652 | *license = value+1;
|
---|
| 3653 | for (i = 0; i < sizeof(gpl_licenses)/sizeof(gpl_licenses[0]); ++i) {
|
---|
| 3654 | if (strcmp(value+1, gpl_licenses[i]) == 0)
|
---|
| 3655 | return(0);
|
---|
| 3656 | }
|
---|
| 3657 | return(2);
|
---|
| 3658 | }
|
---|
| 3659 | if (strchr(ptr, '\0'))
|
---|
| 3660 | ptr = strchr(ptr, '\0') + 1;
|
---|
| 3661 | else
|
---|
| 3662 | ptr = endptr;
|
---|
| 3663 | }
|
---|
| 3664 | }
|
---|
| 3665 | return(1);
|
---|
| 3666 | }
|
---|
| 3667 |
|
---|
| 3668 | #define TAINT_FILENAME "/proc/sys/kernel/tainted"
|
---|
| 3669 | #define TAINT_PROPRIETORY_MODULE (1<<0)
|
---|
| 3670 | #define TAINT_FORCED_MODULE (1<<1)
|
---|
| 3671 | #define TAINT_UNSAFE_SMP (1<<2)
|
---|
| 3672 | #define TAINT_URL "http://www.tux.org/lkml/#export-tainted"
|
---|
| 3673 |
|
---|
| 3674 | static void set_tainted(struct obj_file *f, int fd, char *m_name,
|
---|
| 3675 | int kernel_has_tainted, int taint, const char *text1, const char *text2)
|
---|
| 3676 | {
|
---|
| 3677 | char buf[80];
|
---|
| 3678 | int oldval;
|
---|
| 3679 | static int first = 1;
|
---|
| 3680 | if (fd < 0 && !kernel_has_tainted)
|
---|
| 3681 | return; /* New modutils on old kernel */
|
---|
| 3682 | printf("Warning: loading %s will taint the kernel: %s%s\n",
|
---|
| 3683 | m_name, text1, text2);
|
---|
| 3684 | if (first) {
|
---|
| 3685 | printf(" See %s for information about tainted modules\n", TAINT_URL);
|
---|
| 3686 | first = 0;
|
---|
| 3687 | }
|
---|
| 3688 | if (fd >= 0) {
|
---|
| 3689 | read(fd, buf, sizeof(buf)-1);
|
---|
| 3690 | buf[sizeof(buf)-1] = '\0';
|
---|
| 3691 | oldval = strtoul(buf, NULL, 10);
|
---|
| 3692 | sprintf(buf, "%d\n", oldval | taint);
|
---|
| 3693 | write(fd, buf, strlen(buf));
|
---|
| 3694 | }
|
---|
| 3695 | }
|
---|
| 3696 |
|
---|
| 3697 | /* Check if loading this module will taint the kernel. */
|
---|
| 3698 | static void check_tainted_module(struct obj_file *f, char *m_name)
|
---|
| 3699 | {
|
---|
| 3700 | static const char tainted_file[] = TAINT_FILENAME;
|
---|
| 3701 | int fd, kernel_has_tainted;
|
---|
| 3702 | const char *ptr;
|
---|
| 3703 |
|
---|
| 3704 | kernel_has_tainted = 1;
|
---|
| 3705 | if ((fd = open(tainted_file, O_RDWR)) < 0) {
|
---|
| 3706 | if (errno == ENOENT)
|
---|
| 3707 | kernel_has_tainted = 0;
|
---|
| 3708 | else if (errno == EACCES)
|
---|
| 3709 | kernel_has_tainted = 1;
|
---|
| 3710 | else {
|
---|
| 3711 | perror(tainted_file);
|
---|
| 3712 | kernel_has_tainted = 0;
|
---|
| 3713 | }
|
---|
| 3714 | }
|
---|
| 3715 |
|
---|
| 3716 | switch (obj_gpl_license(f, &ptr)) {
|
---|
| 3717 | case 0:
|
---|
| 3718 | break;
|
---|
| 3719 | case 1:
|
---|
| 3720 | set_tainted(f, fd, m_name, kernel_has_tainted, TAINT_PROPRIETORY_MODULE, "no license", "");
|
---|
| 3721 | break;
|
---|
| 3722 | case 2:
|
---|
| 3723 | /* The module has a non-GPL license so we pretend that the
|
---|
| 3724 | * kernel always has a taint flag to get a warning even on
|
---|
| 3725 | * kernels without the proc flag.
|
---|
| 3726 | */
|
---|
| 3727 | set_tainted(f, fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "non-GPL license - ", ptr);
|
---|
| 3728 | break;
|
---|
| 3729 | default:
|
---|
| 3730 | set_tainted(f, fd, m_name, 1, TAINT_PROPRIETORY_MODULE, "Unexpected return from obj_gpl_license", "");
|
---|
| 3731 | break;
|
---|
| 3732 | }
|
---|
| 3733 |
|
---|
| 3734 | if (flag_force_load)
|
---|
| 3735 | set_tainted(f, fd, m_name, 1, TAINT_FORCED_MODULE, "forced load", "");
|
---|
| 3736 |
|
---|
| 3737 | if (fd >= 0)
|
---|
| 3738 | close(fd);
|
---|
| 3739 | }
|
---|
| 3740 | #else /* CONFIG_FEATURE_CHECK_TAINTED_MODULE */
|
---|
| 3741 | #define check_tainted_module(x, y) do { } while(0);
|
---|
| 3742 | #endif /* CONFIG_FEATURE_CHECK_TAINTED_MODULE */
|
---|
| 3743 |
|
---|
| 3744 | #ifdef CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
|
---|
| 3745 | /* add module source, timestamp, kernel version and a symbol for the
|
---|
| 3746 | * start of some sections. this info is used by ksymoops to do better
|
---|
| 3747 | * debugging.
|
---|
| 3748 | */
|
---|
| 3749 | static int
|
---|
| 3750 | get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
|
---|
| 3751 | {
|
---|
| 3752 | #ifdef CONFIG_FEATURE_INSMOD_VERSION_CHECKING
|
---|
| 3753 | return new_get_module_version(f, str);
|
---|
| 3754 | #else /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */
|
---|
| 3755 | strncpy(str, "???", sizeof(str));
|
---|
| 3756 | return -1;
|
---|
| 3757 | #endif /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */
|
---|
| 3758 | }
|
---|
| 3759 |
|
---|
| 3760 | /* add module source, timestamp, kernel version and a symbol for the
|
---|
| 3761 | * start of some sections. this info is used by ksymoops to do better
|
---|
| 3762 | * debugging.
|
---|
| 3763 | */
|
---|
| 3764 | static void
|
---|
| 3765 | add_ksymoops_symbols(struct obj_file *f, const char *filename,
|
---|
| 3766 | const char *m_name)
|
---|
| 3767 | {
|
---|
| 3768 | static const char symprefix[] = "__insmod_";
|
---|
| 3769 | struct obj_section *sec;
|
---|
| 3770 | struct obj_symbol *sym;
|
---|
| 3771 | char *name, *absolute_filename;
|
---|
| 3772 | char str[STRVERSIONLEN], real[PATH_MAX];
|
---|
| 3773 | int i, l, lm_name, lfilename, use_ksymtab, version;
|
---|
| 3774 | struct stat statbuf;
|
---|
| 3775 |
|
---|
| 3776 | static const char *section_names[] = {
|
---|
| 3777 | ".text",
|
---|
| 3778 | ".rodata",
|
---|
| 3779 | ".data",
|
---|
| 3780 | ".bss",
|
---|
| 3781 | ".sbss"
|
---|
| 3782 | };
|
---|
| 3783 |
|
---|
| 3784 | if (realpath(filename, real)) {
|
---|
| 3785 | absolute_filename = bb_xstrdup(real);
|
---|
| 3786 | }
|
---|
| 3787 | else {
|
---|
| 3788 | int save_errno = errno;
|
---|
| 3789 | bb_error_msg("cannot get realpath for %s", filename);
|
---|
| 3790 | errno = save_errno;
|
---|
| 3791 | perror("");
|
---|
| 3792 | absolute_filename = bb_xstrdup(filename);
|
---|
| 3793 | }
|
---|
| 3794 |
|
---|
| 3795 | lm_name = strlen(m_name);
|
---|
| 3796 | lfilename = strlen(absolute_filename);
|
---|
| 3797 |
|
---|
| 3798 | /* add to ksymtab if it already exists or there is no ksymtab and other symbols
|
---|
| 3799 | * are not to be exported. otherwise leave ksymtab alone for now, the
|
---|
| 3800 | * "export all symbols" compatibility code will export these symbols later.
|
---|
| 3801 | */
|
---|
| 3802 | use_ksymtab = obj_find_section(f, "__ksymtab") || !flag_export;
|
---|
| 3803 |
|
---|
| 3804 | if ((sec = obj_find_section(f, ".this"))) {
|
---|
| 3805 | /* tag the module header with the object name, last modified
|
---|
| 3806 | * timestamp and module version. worst case for module version
|
---|
| 3807 | * is 0xffffff, decimal 16777215. putting all three fields in
|
---|
| 3808 | * one symbol is less readable but saves kernel space.
|
---|
| 3809 | */
|
---|
| 3810 | l = sizeof(symprefix)+ /* "__insmod_" */
|
---|
| 3811 | lm_name+ /* module name */
|
---|
| 3812 | 2+ /* "_O" */
|
---|
| 3813 | lfilename+ /* object filename */
|
---|
| 3814 | 2+ /* "_M" */
|
---|
| 3815 | 2*sizeof(statbuf.st_mtime)+ /* mtime in hex */
|
---|
| 3816 | 2+ /* "_V" */
|
---|
| 3817 | 8+ /* version in dec */
|
---|
| 3818 | 1; /* nul */
|
---|
| 3819 | name = xmalloc(l);
|
---|
| 3820 | if (stat(absolute_filename, &statbuf) != 0)
|
---|
| 3821 | statbuf.st_mtime = 0;
|
---|
| 3822 | version = get_module_version(f, str); /* -1 if not found */
|
---|
| 3823 | snprintf(name, l, "%s%s_O%s_M%0*lX_V%d",
|
---|
| 3824 | symprefix, m_name, absolute_filename,
|
---|
| 3825 | (int)(2*sizeof(statbuf.st_mtime)), statbuf.st_mtime,
|
---|
| 3826 | version);
|
---|
| 3827 | sym = obj_add_symbol(f, name, -1,
|
---|
| 3828 | ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
|
---|
| 3829 | sec->idx, sec->header.sh_addr, 0);
|
---|
| 3830 | if (use_ksymtab)
|
---|
| 3831 | new_add_ksymtab(f, sym);
|
---|
| 3832 | }
|
---|
| 3833 | free(absolute_filename);
|
---|
| 3834 | #ifdef _NOT_SUPPORTED_
|
---|
| 3835 | /* record where the persistent data is going, same address as previous symbol */
|
---|
| 3836 |
|
---|
| 3837 | if (f->persist) {
|
---|
| 3838 | l = sizeof(symprefix)+ /* "__insmod_" */
|
---|
| 3839 | lm_name+ /* module name */
|
---|
| 3840 | 2+ /* "_P" */
|
---|
| 3841 | strlen(f->persist)+ /* data store */
|
---|
| 3842 | 1; /* nul */
|
---|
| 3843 | name = xmalloc(l);
|
---|
| 3844 | snprintf(name, l, "%s%s_P%s",
|
---|
| 3845 | symprefix, m_name, f->persist);
|
---|
| 3846 | sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
|
---|
| 3847 | sec->idx, sec->header.sh_addr, 0);
|
---|
| 3848 | if (use_ksymtab)
|
---|
| 3849 | new_add_ksymtab(f, sym);
|
---|
| 3850 | }
|
---|
| 3851 | #endif /* _NOT_SUPPORTED_ */
|
---|
| 3852 | /* tag the desired sections if size is non-zero */
|
---|
| 3853 |
|
---|
| 3854 | for (i = 0; i < sizeof(section_names)/sizeof(section_names[0]); ++i) {
|
---|
| 3855 | if ((sec = obj_find_section(f, section_names[i])) &&
|
---|
| 3856 | sec->header.sh_size) {
|
---|
| 3857 | l = sizeof(symprefix)+ /* "__insmod_" */
|
---|
| 3858 | lm_name+ /* module name */
|
---|
| 3859 | 2+ /* "_S" */
|
---|
| 3860 | strlen(sec->name)+ /* section name */
|
---|
| 3861 | 2+ /* "_L" */
|
---|
| 3862 | 8+ /* length in dec */
|
---|
| 3863 | 1; /* nul */
|
---|
| 3864 | name = xmalloc(l);
|
---|
| 3865 | snprintf(name, l, "%s%s_S%s_L%ld",
|
---|
| 3866 | symprefix, m_name, sec->name,
|
---|
| 3867 | (long)sec->header.sh_size);
|
---|
| 3868 | sym = obj_add_symbol(f, name, -1, ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
|
---|
| 3869 | sec->idx, sec->header.sh_addr, 0);
|
---|
| 3870 | if (use_ksymtab)
|
---|
| 3871 | new_add_ksymtab(f, sym);
|
---|
| 3872 | }
|
---|
| 3873 | }
|
---|
| 3874 | }
|
---|
| 3875 | #endif /* CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
|
---|
| 3876 |
|
---|
| 3877 | #ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP
|
---|
| 3878 | static void print_load_map(struct obj_file *f)
|
---|
| 3879 | {
|
---|
| 3880 | struct obj_symbol *sym;
|
---|
| 3881 | struct obj_symbol **all, **p;
|
---|
| 3882 | struct obj_section *sec;
|
---|
| 3883 | int i, nsyms, *loaded;
|
---|
| 3884 |
|
---|
| 3885 | /* Report on the section layout. */
|
---|
| 3886 |
|
---|
| 3887 | printf("Sections: Size %-*s Align\n",
|
---|
| 3888 | (int) (2 * sizeof(void *)), "Address");
|
---|
| 3889 |
|
---|
| 3890 | for (sec = f->load_order; sec; sec = sec->load_next) {
|
---|
| 3891 | int a;
|
---|
| 3892 | unsigned long tmp;
|
---|
| 3893 |
|
---|
| 3894 | for (a = -1, tmp = sec->header.sh_addralign; tmp; ++a)
|
---|
| 3895 | tmp >>= 1;
|
---|
| 3896 | if (a == -1)
|
---|
| 3897 | a = 0;
|
---|
| 3898 |
|
---|
| 3899 | printf("%-15s %08lx %0*lx 2**%d\n",
|
---|
| 3900 | sec->name,
|
---|
| 3901 | (long)sec->header.sh_size,
|
---|
| 3902 | (int) (2 * sizeof(void *)),
|
---|
| 3903 | (long)sec->header.sh_addr,
|
---|
| 3904 | a);
|
---|
| 3905 | }
|
---|
| 3906 | #ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP_FULL
|
---|
| 3907 | /* Quick reference which section indicies are loaded. */
|
---|
| 3908 |
|
---|
| 3909 | loaded = alloca(sizeof(int) * (i = f->header.e_shnum));
|
---|
| 3910 | while (--i >= 0)
|
---|
| 3911 | loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0;
|
---|
| 3912 |
|
---|
| 3913 | /* Collect the symbols we'll be listing. */
|
---|
| 3914 |
|
---|
| 3915 | for (nsyms = i = 0; i < HASH_BUCKETS; ++i)
|
---|
| 3916 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 3917 | if (sym->secidx <= SHN_HIRESERVE
|
---|
| 3918 | && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
|
---|
| 3919 | ++nsyms;
|
---|
| 3920 |
|
---|
| 3921 | all = alloca(nsyms * sizeof(struct obj_symbol *));
|
---|
| 3922 |
|
---|
| 3923 | for (i = 0, p = all; i < HASH_BUCKETS; ++i)
|
---|
| 3924 | for (sym = f->symtab[i]; sym; sym = sym->next)
|
---|
| 3925 | if (sym->secidx <= SHN_HIRESERVE
|
---|
| 3926 | && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
|
---|
| 3927 | *p++ = sym;
|
---|
| 3928 |
|
---|
| 3929 | /* And list them. */
|
---|
| 3930 | printf("\nSymbols:\n");
|
---|
| 3931 | for (p = all; p < all + nsyms; ++p) {
|
---|
| 3932 | char type = '?';
|
---|
| 3933 | unsigned long value;
|
---|
| 3934 |
|
---|
| 3935 | sym = *p;
|
---|
| 3936 | if (sym->secidx == SHN_ABS) {
|
---|
| 3937 | type = 'A';
|
---|
| 3938 | value = sym->value;
|
---|
| 3939 | } else if (sym->secidx == SHN_UNDEF) {
|
---|
| 3940 | type = 'U';
|
---|
| 3941 | value = 0;
|
---|
| 3942 | } else {
|
---|
| 3943 | sec = f->sections[sym->secidx];
|
---|
| 3944 |
|
---|
| 3945 | if (sec->header.sh_type == SHT_NOBITS)
|
---|
| 3946 | type = 'B';
|
---|
| 3947 | else if (sec->header.sh_flags & SHF_ALLOC) {
|
---|
| 3948 | if (sec->header.sh_flags & SHF_EXECINSTR)
|
---|
| 3949 | type = 'T';
|
---|
| 3950 | else if (sec->header.sh_flags & SHF_WRITE)
|
---|
| 3951 | type = 'D';
|
---|
| 3952 | else
|
---|
| 3953 | type = 'R';
|
---|
| 3954 | }
|
---|
| 3955 | value = sym->value + sec->header.sh_addr;
|
---|
| 3956 | }
|
---|
| 3957 |
|
---|
| 3958 | if (ELF_ST_BIND(sym->info) == STB_LOCAL)
|
---|
| 3959 | type = tolower(type);
|
---|
| 3960 |
|
---|
| 3961 | printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value,
|
---|
| 3962 | type, sym->name);
|
---|
| 3963 | }
|
---|
| 3964 | #endif
|
---|
| 3965 | }
|
---|
| 3966 |
|
---|
| 3967 | #endif
|
---|
| 3968 |
|
---|
| 3969 | int insmod_main( int argc, char **argv)
|
---|
| 3970 | {
|
---|
| 3971 | int opt;
|
---|
| 3972 | int len;
|
---|
| 3973 | int k_crcs;
|
---|
| 3974 | char *tmp, *tmp1;
|
---|
| 3975 | unsigned long m_size;
|
---|
| 3976 | ElfW(Addr) m_addr;
|
---|
| 3977 | struct obj_file *f;
|
---|
| 3978 | struct stat st;
|
---|
| 3979 | char *m_name = 0;
|
---|
| 3980 | int exit_status = EXIT_FAILURE;
|
---|
| 3981 | int m_has_modinfo;
|
---|
| 3982 | #ifdef CONFIG_FEATURE_INSMOD_VERSION_CHECKING
|
---|
| 3983 | struct utsname uts_info;
|
---|
| 3984 | char m_strversion[STRVERSIONLEN];
|
---|
| 3985 | int m_version, m_crcs;
|
---|
| 3986 | #endif
|
---|
| 3987 | #ifdef CONFIG_FEATURE_CLEAN_UP
|
---|
| 3988 | FILE *fp = 0;
|
---|
| 3989 | #else
|
---|
| 3990 | FILE *fp;
|
---|
| 3991 | #endif
|
---|
| 3992 | #ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP
|
---|
| 3993 | int flag_print_load_map = 0;
|
---|
| 3994 | #endif
|
---|
| 3995 | int k_version = 0;
|
---|
| 3996 | struct utsname myuname;
|
---|
| 3997 |
|
---|
| 3998 | /* Parse any options */
|
---|
| 3999 | #ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP
|
---|
| 4000 | while ((opt = getopt(argc, argv, "fkqsvxmLo:")) > 0)
|
---|
| 4001 | #else
|
---|
| 4002 | while ((opt = getopt(argc, argv, "fkqsvxLo:")) > 0)
|
---|
| 4003 | #endif
|
---|
| 4004 | {
|
---|
| 4005 | switch (opt) {
|
---|
| 4006 | case 'f': /* force loading */
|
---|
| 4007 | flag_force_load = 1;
|
---|
| 4008 | break;
|
---|
| 4009 | case 'k': /* module loaded by kerneld, auto-cleanable */
|
---|
| 4010 | flag_autoclean = 1;
|
---|
| 4011 | break;
|
---|
| 4012 | case 's': /* log to syslog */
|
---|
| 4013 | /* log to syslog -- not supported */
|
---|
| 4014 | /* but kernel needs this for request_module(), */
|
---|
| 4015 | /* as this calls: modprobe -k -s -- <module> */
|
---|
| 4016 | /* so silently ignore this flag */
|
---|
| 4017 | break;
|
---|
| 4018 | case 'v': /* verbose output */
|
---|
| 4019 | flag_verbose = 1;
|
---|
| 4020 | break;
|
---|
| 4021 | case 'q': /* silent */
|
---|
| 4022 | flag_quiet = 1;
|
---|
| 4023 | break;
|
---|
| 4024 | case 'x': /* do not export externs */
|
---|
| 4025 | flag_export = 0;
|
---|
| 4026 | break;
|
---|
| 4027 | case 'o': /* name the output module */
|
---|
| 4028 | free(m_name);
|
---|
| 4029 | m_name = bb_xstrdup(optarg);
|
---|
| 4030 | break;
|
---|
| 4031 | case 'L': /* Stub warning */
|
---|
| 4032 | /* This is needed for compatibility with modprobe.
|
---|
| 4033 | * In theory, this does locking, but we don't do
|
---|
| 4034 | * that. So be careful and plan your life around not
|
---|
| 4035 | * loading the same module 50 times concurrently. */
|
---|
| 4036 | break;
|
---|
| 4037 | #ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP
|
---|
| 4038 | case 'm': /* print module load map */
|
---|
| 4039 | flag_print_load_map = 1;
|
---|
| 4040 | break;
|
---|
| 4041 | #endif
|
---|
| 4042 | default:
|
---|
| 4043 | bb_show_usage();
|
---|
| 4044 | }
|
---|
| 4045 | }
|
---|
| 4046 |
|
---|
| 4047 | if (argv[optind] == NULL) {
|
---|
| 4048 | bb_show_usage();
|
---|
| 4049 | }
|
---|
| 4050 |
|
---|
| 4051 | /* Grab the module name */
|
---|
| 4052 | tmp1 = bb_xstrdup(argv[optind]);
|
---|
| 4053 | tmp = basename(tmp1);
|
---|
| 4054 | len = strlen(tmp);
|
---|
| 4055 |
|
---|
| 4056 | if (uname(&myuname) == 0) {
|
---|
| 4057 | if (myuname.release[0] == '2') {
|
---|
| 4058 | k_version = myuname.release[2] - '0';
|
---|
| 4059 | }
|
---|
| 4060 | }
|
---|
| 4061 |
|
---|
| 4062 | #if defined(CONFIG_FEATURE_2_6_MODULES)
|
---|
| 4063 | if (k_version > 4 && len > 3 && tmp[len - 3] == '.' &&
|
---|
| 4064 | tmp[len - 2] == 'k' && tmp[len - 1] == 'o') {
|
---|
| 4065 | len-=3;
|
---|
| 4066 | tmp[len] = '\0';
|
---|
| 4067 | }
|
---|
| 4068 | else
|
---|
| 4069 | #endif
|
---|
| 4070 | if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') {
|
---|
| 4071 | len-=2;
|
---|
| 4072 | tmp[len] = '\0';
|
---|
| 4073 | }
|
---|
| 4074 |
|
---|
| 4075 |
|
---|
| 4076 | #if defined(CONFIG_FEATURE_2_6_MODULES)
|
---|
| 4077 | if (k_version > 4)
|
---|
| 4078 | m_fullName = bb_xasprintf("%s.ko", tmp);
|
---|
| 4079 | else
|
---|
| 4080 | #endif
|
---|
| 4081 | m_fullName = bb_xasprintf("%s.o", tmp);
|
---|
| 4082 |
|
---|
| 4083 | if (!m_name) {
|
---|
| 4084 | m_name = tmp;
|
---|
| 4085 | } else {
|
---|
| 4086 | free(tmp1);
|
---|
| 4087 | tmp1 = 0; /* flag for free(m_name) before exit() */
|
---|
| 4088 | }
|
---|
| 4089 |
|
---|
| 4090 | /* Get a filedesc for the module. Check we we have a complete path */
|
---|
| 4091 | if (stat(argv[optind], &st) < 0 || !S_ISREG(st.st_mode) ||
|
---|
| 4092 | (fp = fopen(argv[optind], "r")) == NULL) {
|
---|
| 4093 | /* Hmm. Could not open it. First search under /lib/modules/`uname -r`,
|
---|
| 4094 | * but do not error out yet if we fail to find it... */
|
---|
| 4095 | if (k_version) { /* uname succeedd */
|
---|
| 4096 | char *module_dir;
|
---|
| 4097 | char *tmdn;
|
---|
| 4098 | char real_module_dir[FILENAME_MAX];
|
---|
| 4099 |
|
---|
| 4100 | tmdn = concat_path_file(_PATH_MODULES, myuname.release);
|
---|
| 4101 | /* Jump through hoops in case /lib/modules/`uname -r`
|
---|
| 4102 | * is a symlink. We do not want recursive_action to
|
---|
| 4103 | * follow symlinks, but we do want to follow the
|
---|
| 4104 | * /lib/modules/`uname -r` dir, So resolve it ourselves
|
---|
| 4105 | * if it is a link... */
|
---|
| 4106 | if (realpath (tmdn, real_module_dir) == NULL)
|
---|
| 4107 | module_dir = tmdn;
|
---|
| 4108 | else
|
---|
| 4109 | module_dir = real_module_dir;
|
---|
| 4110 | recursive_action(module_dir, TRUE, FALSE, FALSE,
|
---|
| 4111 | check_module_name_match, 0, m_fullName);
|
---|
| 4112 | free(tmdn);
|
---|
| 4113 | }
|
---|
| 4114 |
|
---|
| 4115 | /* Check if we have found anything yet */
|
---|
| 4116 | if (m_filename == 0 || ((fp = fopen(m_filename, "r")) == NULL))
|
---|
| 4117 | {
|
---|
| 4118 | char module_dir[FILENAME_MAX];
|
---|
| 4119 |
|
---|
| 4120 | free(m_filename);
|
---|
| 4121 | m_filename = 0;
|
---|
| 4122 | if (realpath (_PATH_MODULES, module_dir) == NULL)
|
---|
| 4123 | strcpy(module_dir, _PATH_MODULES);
|
---|
| 4124 | /* No module found under /lib/modules/`uname -r`, this
|
---|
| 4125 | * time cast the net a bit wider. Search /lib/modules/ */
|
---|
| 4126 | if (! recursive_action(module_dir, TRUE, FALSE, FALSE,
|
---|
| 4127 | check_module_name_match, 0, m_fullName))
|
---|
| 4128 | {
|
---|
| 4129 | if (m_filename == 0
|
---|
| 4130 | || ((fp = fopen(m_filename, "r")) == NULL))
|
---|
| 4131 | {
|
---|
| 4132 | bb_error_msg("%s: no module by that name found", m_fullName);
|
---|
| 4133 | goto out;
|
---|
| 4134 | }
|
---|
| 4135 | } else
|
---|
| 4136 | bb_error_msg_and_die("%s: no module by that name found", m_fullName);
|
---|
| 4137 | }
|
---|
| 4138 | } else
|
---|
| 4139 | m_filename = bb_xstrdup(argv[optind]);
|
---|
| 4140 |
|
---|
| 4141 | if (flag_verbose)
|
---|
| 4142 | printf("Using %s\n", m_filename);
|
---|
| 4143 |
|
---|
| 4144 | #ifdef CONFIG_FEATURE_2_6_MODULES
|
---|
| 4145 | if (k_version > 4)
|
---|
| 4146 | {
|
---|
| 4147 | optind--;
|
---|
| 4148 | argv[optind + 1] = m_filename;
|
---|
| 4149 | return insmod_ng_main(argc - optind, argv + optind);
|
---|
| 4150 | }
|
---|
| 4151 | #endif
|
---|
| 4152 |
|
---|
| 4153 | if ((f = obj_load(fp, LOADBITS)) == NULL)
|
---|
| 4154 | bb_perror_msg_and_die("Could not load the module");
|
---|
| 4155 |
|
---|
| 4156 | if (get_modinfo_value(f, "kernel_version") == NULL)
|
---|
| 4157 | m_has_modinfo = 0;
|
---|
| 4158 | else
|
---|
| 4159 | m_has_modinfo = 1;
|
---|
| 4160 |
|
---|
| 4161 | #ifdef CONFIG_FEATURE_INSMOD_VERSION_CHECKING
|
---|
| 4162 | /* Version correspondence? */
|
---|
| 4163 | if (!flag_quiet) {
|
---|
| 4164 | if (uname(&uts_info) < 0)
|
---|
| 4165 | uts_info.release[0] = '\0';
|
---|
| 4166 | if (m_has_modinfo) {
|
---|
| 4167 | m_version = new_get_module_version(f, m_strversion);
|
---|
| 4168 | if (m_version == -1) {
|
---|
| 4169 | bb_error_msg("couldn't find the kernel version the module was "
|
---|
| 4170 | "compiled for");
|
---|
| 4171 | goto out;
|
---|
| 4172 | }
|
---|
| 4173 | }
|
---|
| 4174 |
|
---|
| 4175 | if (strncmp(uts_info.release, m_strversion, STRVERSIONLEN) != 0) {
|
---|
| 4176 | if (flag_force_load) {
|
---|
| 4177 | bb_error_msg("Warning: kernel-module version mismatch\n"
|
---|
| 4178 | "\t%s was compiled for kernel version %s\n"
|
---|
| 4179 | "\twhile this kernel is version %s",
|
---|
| 4180 | m_filename, m_strversion, uts_info.release);
|
---|
| 4181 | } else {
|
---|
| 4182 | bb_error_msg("kernel-module version mismatch\n"
|
---|
| 4183 | "\t%s was compiled for kernel version %s\n"
|
---|
| 4184 | "\twhile this kernel is version %s.",
|
---|
| 4185 | m_filename, m_strversion, uts_info.release);
|
---|
| 4186 | goto out;
|
---|
| 4187 | }
|
---|
| 4188 | }
|
---|
| 4189 | }
|
---|
| 4190 | k_crcs = 0;
|
---|
| 4191 | #endif /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */
|
---|
| 4192 |
|
---|
| 4193 | if (!query_module(NULL, 0, NULL, 0, NULL)) {
|
---|
| 4194 | if (!new_get_kernel_symbols())
|
---|
| 4195 | goto out;
|
---|
| 4196 | k_crcs = new_is_kernel_checksummed();
|
---|
| 4197 | } else {
|
---|
| 4198 | bb_error_msg("Not configured to support old kernels");
|
---|
| 4199 | goto out;
|
---|
| 4200 | }
|
---|
| 4201 |
|
---|
| 4202 | #ifdef CONFIG_FEATURE_INSMOD_VERSION_CHECKING
|
---|
| 4203 | m_crcs = 0;
|
---|
| 4204 | if (m_has_modinfo)
|
---|
| 4205 | m_crcs = new_is_module_checksummed(f);
|
---|
| 4206 |
|
---|
| 4207 | if (m_crcs != k_crcs)
|
---|
| 4208 | obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash);
|
---|
| 4209 | #endif /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */
|
---|
| 4210 |
|
---|
| 4211 | /* Let the module know about the kernel symbols. */
|
---|
| 4212 | add_kernel_symbols(f);
|
---|
| 4213 |
|
---|
| 4214 | /* Allocate common symbols, symbol tables, and string tables. */
|
---|
| 4215 |
|
---|
| 4216 | if (!new_create_this_module(f, m_name))
|
---|
| 4217 | {
|
---|
| 4218 | goto out;
|
---|
| 4219 | }
|
---|
| 4220 |
|
---|
| 4221 | if (!obj_check_undefineds(f)) {
|
---|
| 4222 | goto out;
|
---|
| 4223 | }
|
---|
| 4224 | obj_allocate_commons(f);
|
---|
| 4225 | check_tainted_module(f, m_name);
|
---|
| 4226 |
|
---|
| 4227 | /* done with the module name, on to the optional var=value arguments */
|
---|
| 4228 | ++optind;
|
---|
| 4229 |
|
---|
| 4230 | if (optind < argc) {
|
---|
| 4231 | if (!new_process_module_arguments(f, argc - optind, argv + optind))
|
---|
| 4232 | {
|
---|
| 4233 | goto out;
|
---|
| 4234 | }
|
---|
| 4235 | }
|
---|
| 4236 |
|
---|
| 4237 | arch_create_got(f);
|
---|
| 4238 | hide_special_symbols(f);
|
---|
| 4239 |
|
---|
| 4240 | #ifdef CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
|
---|
| 4241 | add_ksymoops_symbols(f, m_filename, m_name);
|
---|
| 4242 | #endif /* CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
|
---|
| 4243 |
|
---|
| 4244 | new_create_module_ksymtab(f);
|
---|
| 4245 |
|
---|
| 4246 | /* Find current size of the module */
|
---|
| 4247 | m_size = obj_load_size(f);
|
---|
| 4248 |
|
---|
| 4249 |
|
---|
| 4250 | m_addr = create_module(m_name, m_size);
|
---|
| 4251 | if (m_addr == -1) switch (errno) {
|
---|
| 4252 | case EEXIST:
|
---|
| 4253 | bb_error_msg("A module named %s already exists", m_name);
|
---|
| 4254 | goto out;
|
---|
| 4255 | case ENOMEM:
|
---|
| 4256 | bb_error_msg("Can't allocate kernel memory for module; needed %lu bytes",
|
---|
| 4257 | m_size);
|
---|
| 4258 | goto out;
|
---|
| 4259 | default:
|
---|
| 4260 | bb_perror_msg("create_module: %s", m_name);
|
---|
| 4261 | goto out;
|
---|
| 4262 | }
|
---|
| 4263 |
|
---|
| 4264 | #if !LOADBITS
|
---|
| 4265 | /*
|
---|
| 4266 | * the PROGBITS section was not loaded by the obj_load
|
---|
| 4267 | * now we can load them directly into the kernel memory
|
---|
| 4268 | */
|
---|
| 4269 | if (!obj_load_progbits(fp, f, (char*)m_addr)) {
|
---|
| 4270 | delete_module(m_name);
|
---|
| 4271 | goto out;
|
---|
| 4272 | }
|
---|
| 4273 | #endif
|
---|
| 4274 |
|
---|
| 4275 | if (!obj_relocate(f, m_addr)) {
|
---|
| 4276 | delete_module(m_name);
|
---|
| 4277 | goto out;
|
---|
| 4278 | }
|
---|
| 4279 |
|
---|
| 4280 | if (!new_init_module(m_name, f, m_size))
|
---|
| 4281 | {
|
---|
| 4282 | delete_module(m_name);
|
---|
| 4283 | goto out;
|
---|
| 4284 | }
|
---|
| 4285 |
|
---|
| 4286 | #ifdef CONFIG_FEATURE_INSMOD_LOAD_MAP
|
---|
| 4287 | if(flag_print_load_map)
|
---|
| 4288 | print_load_map(f);
|
---|
| 4289 | #endif
|
---|
| 4290 |
|
---|
| 4291 | exit_status = EXIT_SUCCESS;
|
---|
| 4292 |
|
---|
| 4293 | out:
|
---|
| 4294 | #ifdef CONFIG_FEATURE_CLEAN_UP
|
---|
| 4295 | if(fp)
|
---|
| 4296 | fclose(fp);
|
---|
| 4297 | free(tmp1);
|
---|
| 4298 | if(!tmp1) {
|
---|
| 4299 | free(m_name);
|
---|
| 4300 | }
|
---|
| 4301 | free(m_filename);
|
---|
| 4302 | #endif
|
---|
| 4303 | return(exit_status);
|
---|
| 4304 | }
|
---|
| 4305 |
|
---|
| 4306 |
|
---|
| 4307 | #endif
|
---|
| 4308 |
|
---|
| 4309 |
|
---|
| 4310 | #ifdef CONFIG_FEATURE_2_6_MODULES
|
---|
| 4311 |
|
---|
| 4312 | #include <sys/mman.h>
|
---|
| 4313 | #include <asm/unistd.h>
|
---|
| 4314 | #include <sys/syscall.h>
|
---|
| 4315 |
|
---|
| 4316 | /* We use error numbers in a loose translation... */
|
---|
| 4317 | static const char *moderror(int err)
|
---|
| 4318 | {
|
---|
| 4319 | switch (err) {
|
---|
| 4320 | case ENOEXEC:
|
---|
| 4321 | return "Invalid module format";
|
---|
| 4322 | case ENOENT:
|
---|
| 4323 | return "Unknown symbol in module";
|
---|
| 4324 | case ESRCH:
|
---|
| 4325 | return "Module has wrong symbol version";
|
---|
| 4326 | case EINVAL:
|
---|
| 4327 | return "Invalid parameters";
|
---|
| 4328 | default:
|
---|
| 4329 | return strerror(err);
|
---|
| 4330 | }
|
---|
| 4331 | }
|
---|
| 4332 |
|
---|
| 4333 | int insmod_ng_main( int argc, char **argv)
|
---|
| 4334 | {
|
---|
| 4335 | int i;
|
---|
| 4336 | int fd;
|
---|
| 4337 | long int ret;
|
---|
| 4338 | struct stat st;
|
---|
| 4339 | unsigned long len;
|
---|
| 4340 | void *map;
|
---|
| 4341 | char *filename, *options = bb_xstrdup("");
|
---|
| 4342 |
|
---|
| 4343 | filename = argv[1];
|
---|
| 4344 | if (!filename) {
|
---|
| 4345 | bb_show_usage();
|
---|
| 4346 | return -1;
|
---|
| 4347 | }
|
---|
| 4348 |
|
---|
| 4349 | /* Rest is options */
|
---|
| 4350 | for (i = 2; i < argc; i++) {
|
---|
| 4351 | options = xrealloc(options, strlen(options) + 2 + strlen(argv[i]) + 2);
|
---|
| 4352 | /* Spaces handled by "" pairs, but no way of escaping quotes */
|
---|
| 4353 | if (strchr(argv[i], ' ')) {
|
---|
| 4354 | strcat(options, "\"");
|
---|
| 4355 | strcat(options, argv[i]);
|
---|
| 4356 | strcat(options, "\"");
|
---|
| 4357 | } else {
|
---|
| 4358 | strcat(options, argv[i]);
|
---|
| 4359 | }
|
---|
| 4360 | strcat(options, " ");
|
---|
| 4361 | }
|
---|
| 4362 |
|
---|
| 4363 | fd = bb_xopen3(filename, O_RDONLY, 0);
|
---|
| 4364 |
|
---|
| 4365 | fstat(fd, &st);
|
---|
| 4366 | len = st.st_size;
|
---|
| 4367 | map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
|
---|
| 4368 | if (map == MAP_FAILED) {
|
---|
| 4369 | bb_perror_msg_and_die("cannot mmap `%s'", filename);
|
---|
| 4370 | }
|
---|
| 4371 |
|
---|
| 4372 | ret = syscall(__NR_init_module, map, len, options);
|
---|
| 4373 | if (ret != 0) {
|
---|
| 4374 | bb_perror_msg_and_die("cannot insert `%s': %s (%li)",
|
---|
| 4375 | filename, moderror(errno), ret);
|
---|
| 4376 | }
|
---|
| 4377 |
|
---|
| 4378 | return 0;
|
---|
| 4379 | }
|
---|
| 4380 |
|
---|
| 4381 | #endif
|
---|