Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Mini insmod implementation for busybox |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 4 | * This version of insmod now supports x86, ARM, SH3/4, powerpc, and MIPS. |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 5 | * |
Eric Andersen | 8ec10a9 | 2001-01-27 09:33:39 +0000 | [diff] [blame] | 6 | * Copyright (C) 1999,2000,2001 by Lineo, inc. |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 7 | * Written by Erik Andersen <andersen@lineo.com> |
| 8 | * and Ron Alder <alder@lineo.com> |
| 9 | * |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 10 | * Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4 |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 11 | * and (theoretically) SH3. I have only tested SH4 in little endian mode. |
| 12 | * |
| 13 | * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and |
| 14 | * Nicolas Ferre <nicolas.ferre@alcove.fr> to support ARM7TDMI. Only |
| 15 | * very minor changes required to also work with StrongArm and presumably |
| 16 | * all ARM based systems. |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 17 | * |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 18 | * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001. |
| 19 | * PowerPC specific code stolen from modutils-2.3.16, |
| 20 | * written by Paul Mackerras, Copyright 1996, 1997 Linux International. |
| 21 | * I've only tested the code on mpc8xx platforms in big-endian mode. |
| 22 | * Did some cleanup and added BB_USE_xxx_ENTRIES... |
| 23 | * |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 24 | * Quinn Jensen <jensenq@lineo.com> added MIPS support 23-Feb-2001. |
| 25 | * based on modutils-2.4.2 |
| 26 | * MIPS specific support for Elf loading and relocation. |
| 27 | * Copyright 1996, 1997 Linux International. |
| 28 | * Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu> |
| 29 | * |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 30 | * Based almost entirely on the Linux modutils-2.3.11 implementation. |
| 31 | * Copyright 1996, 1997 Linux International. |
| 32 | * New implementation contributed by Richard Henderson <rth@tamu.edu> |
| 33 | * Based on original work by Bjorn Ekwall <bj0rn@blox.se> |
| 34 | * Restructured (and partly rewritten) by: |
| 35 | * Björn Ekwall <bj0rn@blox.se> February 1999 |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 36 | * |
| 37 | * This program is free software; you can redistribute it and/or modify |
| 38 | * it under the terms of the GNU General Public License as published by |
| 39 | * the Free Software Foundation; either version 2 of the License, or |
| 40 | * (at your option) any later version. |
| 41 | * |
| 42 | * This program is distributed in the hope that it will be useful, |
| 43 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 44 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 45 | * General Public License for more details. |
| 46 | * |
| 47 | * You should have received a copy of the GNU General Public License |
| 48 | * along with this program; if not, write to the Free Software |
| 49 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 50 | * |
| 51 | */ |
| 52 | |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 53 | #include <stdlib.h> |
| 54 | #include <stdio.h> |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 55 | #include <stddef.h> |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 56 | #include <errno.h> |
| 57 | #include <unistd.h> |
| 58 | #include <dirent.h> |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 59 | #include <ctype.h> |
| 60 | #include <assert.h> |
Eric Andersen | ed3ef50 | 2001-01-27 08:24:39 +0000 | [diff] [blame] | 61 | #include <string.h> |
Eric Andersen | 999bf72 | 2000-07-09 06:59:58 +0000 | [diff] [blame] | 62 | #include <getopt.h> |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 63 | #include <sys/utsname.h> |
Eric Andersen | cbe31da | 2001-02-20 06:14:08 +0000 | [diff] [blame] | 64 | #include "busybox.h" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 65 | |
Eric Andersen | 64c8b17 | 2001-04-05 07:33:10 +0000 | [diff] [blame] | 66 | #ifdef BB_FEATURE_NEW_MODULE_INTERFACE |
| 67 | # define new_sys_init_module init_module |
| 68 | #else |
| 69 | # define old_sys_init_module init_module |
| 70 | #endif |
| 71 | |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 72 | #if defined(__powerpc__) |
| 73 | #define BB_USE_PLT_ENTRIES |
| 74 | #define BB_PLT_ENTRY_SIZE 16 |
| 75 | #endif |
| 76 | |
| 77 | #if defined(__arm__) |
| 78 | #define BB_USE_PLT_ENTRIES |
| 79 | #define BB_PLT_ENTRY_SIZE 8 |
| 80 | #define BB_USE_GOT_ENTRIES |
| 81 | #define BB_GOT_ENTRY_SIZE 8 |
| 82 | #endif |
| 83 | |
| 84 | #if defined(__sh__) |
| 85 | #define BB_USE_GOT_ENTRIES |
| 86 | #define BB_GOT_ENTRY_SIZE 4 |
| 87 | #endif |
| 88 | |
| 89 | #if defined(__i386__) |
| 90 | #define BB_USE_GOT_ENTRIES |
| 91 | #define BB_GOT_ENTRY_SIZE 4 |
| 92 | #endif |
| 93 | |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 94 | #if defined(__mips__) |
| 95 | // neither used |
| 96 | #endif |
| 97 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 98 | //---------------------------------------------------------------------------- |
| 99 | //--------modutils module.h, lines 45-242 |
| 100 | //---------------------------------------------------------------------------- |
| 101 | |
| 102 | /* Definitions for the Linux module syscall interface. |
| 103 | Copyright 1996, 1997 Linux International. |
| 104 | |
| 105 | Contributed by Richard Henderson <rth@tamu.edu> |
| 106 | |
| 107 | This file is part of the Linux modutils. |
| 108 | |
| 109 | This program is free software; you can redistribute it and/or modify it |
| 110 | under the terms of the GNU General Public License as published by the |
| 111 | Free Software Foundation; either version 2 of the License, or (at your |
| 112 | option) any later version. |
| 113 | |
| 114 | This program is distributed in the hope that it will be useful, but |
| 115 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 116 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 117 | General Public License for more details. |
| 118 | |
| 119 | You should have received a copy of the GNU General Public License |
| 120 | along with this program; if not, write to the Free Software Foundation, |
| 121 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 122 | |
| 123 | |
| 124 | #ifndef MODUTILS_MODULE_H |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 125 | static const int MODUTILS_MODULE_H = 1; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 126 | |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 127 | #ident "$Id: insmod.c,v 1.59 2001/04/25 17:22:32 andersen Exp $" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 128 | |
| 129 | /* This file contains the structures used by the 2.0 and 2.1 kernels. |
| 130 | We do not use the kernel headers directly because we do not wish |
| 131 | to be dependant on a particular kernel version to compile insmod. */ |
| 132 | |
| 133 | |
| 134 | /*======================================================================*/ |
| 135 | /* The structures used by Linux 2.0. */ |
| 136 | |
| 137 | /* The symbol format used by get_kernel_syms(2). */ |
| 138 | struct old_kernel_sym |
| 139 | { |
| 140 | unsigned long value; |
| 141 | char name[60]; |
| 142 | }; |
| 143 | |
| 144 | struct old_module_ref |
| 145 | { |
| 146 | unsigned long module; /* kernel addresses */ |
| 147 | unsigned long next; |
| 148 | }; |
| 149 | |
| 150 | struct old_module_symbol |
| 151 | { |
| 152 | unsigned long addr; |
| 153 | unsigned long name; |
| 154 | }; |
| 155 | |
| 156 | struct old_symbol_table |
| 157 | { |
| 158 | int size; /* total, including string table!!! */ |
| 159 | int n_symbols; |
| 160 | int n_refs; |
| 161 | struct old_module_symbol symbol[0]; /* actual size defined by n_symbols */ |
| 162 | struct old_module_ref ref[0]; /* actual size defined by n_refs */ |
| 163 | }; |
| 164 | |
| 165 | struct old_mod_routines |
| 166 | { |
| 167 | unsigned long init; |
| 168 | unsigned long cleanup; |
| 169 | }; |
| 170 | |
| 171 | struct old_module |
| 172 | { |
| 173 | unsigned long next; |
| 174 | unsigned long ref; /* the list of modules that refer to me */ |
| 175 | unsigned long symtab; |
| 176 | unsigned long name; |
| 177 | int size; /* size of module in pages */ |
| 178 | unsigned long addr; /* address of module */ |
| 179 | int state; |
| 180 | unsigned long cleanup; /* cleanup routine */ |
| 181 | }; |
| 182 | |
| 183 | /* Sent to init_module(2) or'ed into the code size parameter. */ |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 184 | static const int OLD_MOD_AUTOCLEAN = 0x40000000; /* big enough, but no sign problems... */ |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 185 | |
| 186 | int get_kernel_syms(struct old_kernel_sym *); |
| 187 | int old_sys_init_module(const char *name, char *code, unsigned codesize, |
| 188 | struct old_mod_routines *, struct old_symbol_table *); |
| 189 | |
| 190 | /*======================================================================*/ |
| 191 | /* For sizeof() which are related to the module platform and not to the |
| 192 | environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */ |
| 193 | |
| 194 | #define tgt_sizeof_char sizeof(char) |
| 195 | #define tgt_sizeof_short sizeof(short) |
| 196 | #define tgt_sizeof_int sizeof(int) |
| 197 | #define tgt_sizeof_long sizeof(long) |
| 198 | #define tgt_sizeof_char_p sizeof(char *) |
| 199 | #define tgt_sizeof_void_p sizeof(void *) |
| 200 | #define tgt_long long |
| 201 | |
| 202 | #if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64) |
| 203 | #undef tgt_sizeof_long |
| 204 | #undef tgt_sizeof_char_p |
| 205 | #undef tgt_sizeof_void_p |
| 206 | #undef tgt_long |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 207 | static const int tgt_sizeof_long = 8; |
| 208 | static const int tgt_sizeof_char_p = 8; |
| 209 | static const int tgt_sizeof_void_p = 8; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 210 | #define tgt_long long long |
| 211 | #endif |
| 212 | |
| 213 | /*======================================================================*/ |
| 214 | /* The structures used in Linux 2.1. */ |
| 215 | |
| 216 | /* Note: new_module_symbol does not use tgt_long intentionally */ |
| 217 | struct new_module_symbol |
| 218 | { |
| 219 | unsigned long value; |
| 220 | unsigned long name; |
| 221 | }; |
| 222 | |
| 223 | struct new_module_persist; |
| 224 | |
| 225 | struct new_module_ref |
| 226 | { |
| 227 | unsigned tgt_long dep; /* kernel addresses */ |
| 228 | unsigned tgt_long ref; |
| 229 | unsigned tgt_long next_ref; |
| 230 | }; |
| 231 | |
| 232 | struct new_module |
| 233 | { |
| 234 | unsigned tgt_long size_of_struct; /* == sizeof(module) */ |
| 235 | unsigned tgt_long next; |
| 236 | unsigned tgt_long name; |
| 237 | unsigned tgt_long size; |
| 238 | |
| 239 | tgt_long usecount; |
| 240 | unsigned tgt_long flags; /* AUTOCLEAN et al */ |
| 241 | |
| 242 | unsigned nsyms; |
| 243 | unsigned ndeps; |
| 244 | |
| 245 | unsigned tgt_long syms; |
| 246 | unsigned tgt_long deps; |
| 247 | unsigned tgt_long refs; |
| 248 | unsigned tgt_long init; |
| 249 | unsigned tgt_long cleanup; |
| 250 | unsigned tgt_long ex_table_start; |
| 251 | unsigned tgt_long ex_table_end; |
| 252 | #ifdef __alpha__ |
| 253 | unsigned tgt_long gp; |
| 254 | #endif |
| 255 | /* Everything after here is extension. */ |
| 256 | unsigned tgt_long persist_start; |
| 257 | unsigned tgt_long persist_end; |
| 258 | unsigned tgt_long can_unload; |
| 259 | unsigned tgt_long runsize; |
| 260 | }; |
| 261 | |
| 262 | struct new_module_info |
| 263 | { |
| 264 | unsigned long addr; |
| 265 | unsigned long size; |
| 266 | unsigned long flags; |
| 267 | long usecount; |
| 268 | }; |
| 269 | |
| 270 | /* Bits of module.flags. */ |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 271 | static const int NEW_MOD_RUNNING = 1; |
| 272 | static const int NEW_MOD_DELETED = 2; |
| 273 | static const int NEW_MOD_AUTOCLEAN = 4; |
| 274 | static const int NEW_MOD_VISITED = 8; |
| 275 | static const int NEW_MOD_USED_ONCE = 16; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 276 | |
Eric Andersen | 64c8b17 | 2001-04-05 07:33:10 +0000 | [diff] [blame] | 277 | int new_sys_init_module(const char *name, const struct new_module *); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 278 | int query_module(const char *name, int which, void *buf, size_t bufsize, |
| 279 | size_t *ret); |
| 280 | |
| 281 | /* Values for query_module's which. */ |
| 282 | |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 283 | static const int QM_MODULES = 1; |
| 284 | static const int QM_DEPS = 2; |
| 285 | static const int QM_REFS = 3; |
| 286 | static const int QM_SYMBOLS = 4; |
| 287 | static const int QM_INFO = 5; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 288 | |
| 289 | /*======================================================================*/ |
| 290 | /* The system calls unchanged between 2.0 and 2.1. */ |
| 291 | |
| 292 | unsigned long create_module(const char *, size_t); |
| 293 | int delete_module(const char *); |
| 294 | |
| 295 | |
| 296 | #endif /* module.h */ |
| 297 | |
| 298 | //---------------------------------------------------------------------------- |
| 299 | //--------end of modutils module.h |
| 300 | //---------------------------------------------------------------------------- |
| 301 | |
| 302 | |
| 303 | |
| 304 | //---------------------------------------------------------------------------- |
| 305 | //--------modutils obj.h, lines 253-462 |
| 306 | //---------------------------------------------------------------------------- |
| 307 | |
| 308 | /* Elf object file loading and relocation routines. |
| 309 | Copyright 1996, 1997 Linux International. |
| 310 | |
| 311 | Contributed by Richard Henderson <rth@tamu.edu> |
| 312 | |
| 313 | This file is part of the Linux modutils. |
| 314 | |
| 315 | This program is free software; you can redistribute it and/or modify it |
| 316 | under the terms of the GNU General Public License as published by the |
| 317 | Free Software Foundation; either version 2 of the License, or (at your |
| 318 | option) any later version. |
| 319 | |
| 320 | This program is distributed in the hope that it will be useful, but |
| 321 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 322 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 323 | General Public License for more details. |
| 324 | |
| 325 | You should have received a copy of the GNU General Public License |
| 326 | along with this program; if not, write to the Free Software Foundation, |
| 327 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 328 | |
| 329 | |
| 330 | #ifndef MODUTILS_OBJ_H |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 331 | static const int MODUTILS_OBJ_H = 1; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 332 | |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 333 | #ident "$Id: insmod.c,v 1.59 2001/04/25 17:22:32 andersen Exp $" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 334 | |
| 335 | /* The relocatable object is manipulated using elfin types. */ |
| 336 | |
| 337 | #include <stdio.h> |
| 338 | #include <elf.h> |
| 339 | |
| 340 | |
| 341 | /* Machine-specific elf macros for i386 et al. */ |
| 342 | |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 343 | /* the SH changes have only been tested on the SH4 in =little endian= mode */ |
| 344 | /* I'm not sure about big endian, so let's warn: */ |
| 345 | |
| 346 | #if (defined(__SH4__) || defined(__SH3__)) && defined(__BIG_ENDIAN__) |
| 347 | #error insmod.c may require changes for use on big endian SH4/SH3 |
| 348 | #endif |
| 349 | |
| 350 | /* it may or may not work on the SH1/SH2... So let's error on those |
| 351 | also */ |
| 352 | #if (defined(__sh__) && (!(defined(__SH3__) || defined(__SH4__)))) |
| 353 | #error insmod.c may require changes for non-SH3/SH4 use |
| 354 | #endif |
| 355 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 356 | #define ELFCLASSM ELFCLASS32 |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 357 | |
| 358 | #if defined(__sh__) |
| 359 | |
| 360 | #define MATCH_MACHINE(x) (x == EM_SH) |
| 361 | #define SHT_RELM SHT_RELA |
| 362 | #define Elf32_RelM Elf32_Rela |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 363 | #define ELFDATAM ELFDATA2LSB |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 364 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 365 | #elif defined(__arm__) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 366 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 367 | #define MATCH_MACHINE(x) (x == EM_ARM) |
| 368 | #define SHT_RELM SHT_REL |
| 369 | #define Elf32_RelM Elf32_Rel |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 370 | #define ELFDATAM ELFDATA2LSB |
| 371 | |
| 372 | #elif defined(__powerpc__) |
| 373 | |
| 374 | #define MATCH_MACHINE(x) (x == EM_PPC) |
| 375 | #define SHT_RELM SHT_RELA |
| 376 | #define Elf32_RelM Elf32_Rela |
| 377 | #define ELFDATAM ELFDATA2MSB |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 378 | |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 379 | #elif defined(__mips__) |
| 380 | |
Eric Andersen | 82bb8a2 | 2001-03-22 19:01:16 +0000 | [diff] [blame] | 381 | /* Account for ELF spec changes. */ |
| 382 | #ifndef EM_MIPS_RS3_LE |
| 383 | #ifdef EM_MIPS_RS4_BE |
| 384 | #define EM_MIPS_RS3_LE EM_MIPS_RS4_BE |
| 385 | #else |
| 386 | #define EM_MIPS_RS3_LE 10 |
| 387 | #endif |
| 388 | #endif /* !EM_MIPS_RS3_LE */ |
| 389 | |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 390 | #define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE) |
| 391 | #define SHT_RELM SHT_REL |
| 392 | #define Elf32_RelM Elf32_Rel |
| 393 | #ifdef __MIPSEB__ |
| 394 | #define ELFDATAM ELFDATA2MSB |
| 395 | #endif |
| 396 | #ifdef __MIPSEL__ |
| 397 | #define ELFDATAM ELFDATA2LSB |
| 398 | #endif |
| 399 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 400 | #elif defined(__i386__) |
| 401 | |
| 402 | /* presumably we can use these for anything but the SH and ARM*/ |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 403 | /* this is the previous behavior, but it does result in |
| 404 | insmod.c being broken on anything except i386 */ |
Pavel Roskin | 43f3e61 | 2000-09-28 20:52:55 +0000 | [diff] [blame] | 405 | #ifndef EM_486 |
| 406 | #define MATCH_MACHINE(x) (x == EM_386) |
| 407 | #else |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 408 | #define MATCH_MACHINE(x) (x == EM_386 || x == EM_486) |
Pavel Roskin | 43f3e61 | 2000-09-28 20:52:55 +0000 | [diff] [blame] | 409 | #endif |
| 410 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 411 | #define SHT_RELM SHT_REL |
| 412 | #define Elf32_RelM Elf32_Rel |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 413 | #define ELFDATAM ELFDATA2LSB |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 414 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 415 | #else |
Eric Andersen | d5cad14 | 2001-01-26 02:23:57 +0000 | [diff] [blame] | 416 | #error Sorry, but insmod.c does not yet support this architecture... |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 417 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 418 | |
| 419 | #ifndef ElfW |
| 420 | # if ELFCLASSM == ELFCLASS32 |
| 421 | # define ElfW(x) Elf32_ ## x |
| 422 | # define ELFW(x) ELF32_ ## x |
| 423 | # else |
| 424 | # define ElfW(x) Elf64_ ## x |
| 425 | # define ELFW(x) ELF64_ ## x |
| 426 | # endif |
| 427 | #endif |
| 428 | |
| 429 | /* For some reason this is missing from libc5. */ |
| 430 | #ifndef ELF32_ST_INFO |
| 431 | # define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) |
| 432 | #endif |
| 433 | |
| 434 | #ifndef ELF64_ST_INFO |
| 435 | # define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) |
| 436 | #endif |
| 437 | |
| 438 | struct obj_string_patch; |
| 439 | struct obj_symbol_patch; |
| 440 | |
| 441 | struct obj_section |
| 442 | { |
| 443 | ElfW(Shdr) header; |
| 444 | const char *name; |
| 445 | char *contents; |
| 446 | struct obj_section *load_next; |
| 447 | int idx; |
| 448 | }; |
| 449 | |
| 450 | struct obj_symbol |
| 451 | { |
| 452 | struct obj_symbol *next; /* hash table link */ |
| 453 | const char *name; |
| 454 | unsigned long value; |
| 455 | unsigned long size; |
| 456 | int secidx; /* the defining section index/module */ |
| 457 | int info; |
| 458 | int ksymidx; /* for export to the kernel symtab */ |
| 459 | int referenced; /* actually used in the link */ |
| 460 | }; |
| 461 | |
| 462 | /* Hardcode the hash table size. We shouldn't be needing so many |
| 463 | symbols that we begin to degrade performance, and we get a big win |
| 464 | by giving the compiler a constant divisor. */ |
| 465 | |
| 466 | #define HASH_BUCKETS 521 |
| 467 | |
| 468 | struct obj_file |
| 469 | { |
| 470 | ElfW(Ehdr) header; |
| 471 | ElfW(Addr) baseaddr; |
| 472 | struct obj_section **sections; |
| 473 | struct obj_section *load_order; |
| 474 | struct obj_section **load_order_search_start; |
| 475 | struct obj_string_patch *string_patches; |
| 476 | struct obj_symbol_patch *symbol_patches; |
| 477 | int (*symbol_cmp)(const char *, const char *); |
| 478 | unsigned long (*symbol_hash)(const char *); |
| 479 | unsigned long local_symtab_size; |
| 480 | struct obj_symbol **local_symtab; |
| 481 | struct obj_symbol *symtab[HASH_BUCKETS]; |
| 482 | }; |
| 483 | |
| 484 | enum obj_reloc |
| 485 | { |
| 486 | obj_reloc_ok, |
| 487 | obj_reloc_overflow, |
| 488 | obj_reloc_dangerous, |
| 489 | obj_reloc_unhandled |
| 490 | }; |
| 491 | |
| 492 | struct obj_string_patch |
| 493 | { |
| 494 | struct obj_string_patch *next; |
| 495 | int reloc_secidx; |
| 496 | ElfW(Addr) reloc_offset; |
| 497 | ElfW(Addr) string_offset; |
| 498 | }; |
| 499 | |
| 500 | struct obj_symbol_patch |
| 501 | { |
| 502 | struct obj_symbol_patch *next; |
| 503 | int reloc_secidx; |
| 504 | ElfW(Addr) reloc_offset; |
| 505 | struct obj_symbol *sym; |
| 506 | }; |
| 507 | |
| 508 | |
| 509 | /* Generic object manipulation routines. */ |
| 510 | |
| 511 | unsigned long obj_elf_hash(const char *); |
| 512 | |
| 513 | unsigned long obj_elf_hash_n(const char *, unsigned long len); |
| 514 | |
| 515 | struct obj_symbol *obj_add_symbol (struct obj_file *f, const char *name, |
| 516 | unsigned long symidx, int info, int secidx, |
| 517 | ElfW(Addr) value, unsigned long size); |
| 518 | |
| 519 | struct obj_symbol *obj_find_symbol (struct obj_file *f, |
| 520 | const char *name); |
| 521 | |
| 522 | ElfW(Addr) obj_symbol_final_value(struct obj_file *f, |
| 523 | struct obj_symbol *sym); |
| 524 | |
| 525 | void obj_set_symbol_compare(struct obj_file *f, |
| 526 | int (*cmp)(const char *, const char *), |
| 527 | unsigned long (*hash)(const char *)); |
| 528 | |
| 529 | struct obj_section *obj_find_section (struct obj_file *f, |
| 530 | const char *name); |
| 531 | |
| 532 | void obj_insert_section_load_order (struct obj_file *f, |
| 533 | struct obj_section *sec); |
| 534 | |
| 535 | struct obj_section *obj_create_alloced_section (struct obj_file *f, |
| 536 | const char *name, |
| 537 | unsigned long align, |
| 538 | unsigned long size); |
| 539 | |
| 540 | struct obj_section *obj_create_alloced_section_first (struct obj_file *f, |
| 541 | const char *name, |
| 542 | unsigned long align, |
| 543 | unsigned long size); |
| 544 | |
| 545 | void *obj_extend_section (struct obj_section *sec, unsigned long more); |
| 546 | |
| 547 | int obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, |
| 548 | const char *string); |
| 549 | |
| 550 | int obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, |
| 551 | struct obj_symbol *sym); |
| 552 | |
| 553 | int obj_check_undefineds(struct obj_file *f); |
| 554 | |
| 555 | void obj_allocate_commons(struct obj_file *f); |
| 556 | |
| 557 | unsigned long obj_load_size (struct obj_file *f); |
| 558 | |
| 559 | int obj_relocate (struct obj_file *f, ElfW(Addr) base); |
| 560 | |
| 561 | struct obj_file *obj_load(FILE *f); |
| 562 | |
| 563 | int obj_create_image (struct obj_file *f, char *image); |
| 564 | |
| 565 | /* Architecture specific manipulation routines. */ |
| 566 | |
| 567 | struct obj_file *arch_new_file (void); |
| 568 | |
| 569 | struct obj_section *arch_new_section (void); |
| 570 | |
| 571 | struct obj_symbol *arch_new_symbol (void); |
| 572 | |
| 573 | enum obj_reloc arch_apply_relocation (struct obj_file *f, |
| 574 | struct obj_section *targsec, |
| 575 | struct obj_section *symsec, |
| 576 | struct obj_symbol *sym, |
| 577 | ElfW(RelM) *rel, ElfW(Addr) value); |
| 578 | |
| 579 | int arch_create_got (struct obj_file *f); |
| 580 | |
| 581 | struct new_module; |
| 582 | int arch_init_module (struct obj_file *f, struct new_module *); |
| 583 | |
| 584 | #endif /* obj.h */ |
| 585 | //---------------------------------------------------------------------------- |
| 586 | //--------end of modutils obj.h |
| 587 | //---------------------------------------------------------------------------- |
| 588 | |
| 589 | |
| 590 | |
| 591 | |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 592 | |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 593 | #define _PATH_MODULES "/lib/modules" |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 594 | static const int STRVERSIONLEN = 32; |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 595 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 596 | /*======================================================================*/ |
| 597 | |
| 598 | int flag_force_load = 0; |
| 599 | int flag_autoclean = 0; |
| 600 | int flag_verbose = 0; |
| 601 | int flag_export = 1; |
| 602 | |
| 603 | |
| 604 | /*======================================================================*/ |
| 605 | |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 606 | /* previously, these were named i386_* but since we could be |
| 607 | compiling for the sh, I've renamed them to the more general |
| 608 | arch_* These structures are the same between the x86 and SH, |
| 609 | and we can't support anything else right now anyway. In the |
| 610 | future maybe they should be #if defined'd */ |
| 611 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 612 | /* Done ;-) */ |
| 613 | |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 614 | |
| 615 | |
| 616 | #if defined(BB_USE_PLT_ENTRIES) |
| 617 | struct arch_plt_entry |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 618 | { |
| 619 | int offset; |
| 620 | int allocated:1; |
| 621 | int inited:1; /* has been set up */ |
| 622 | }; |
| 623 | #endif |
| 624 | |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 625 | #if defined(BB_USE_GOT_ENTRIES) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 626 | struct arch_got_entry { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 627 | int offset; |
| 628 | unsigned offset_done:1; |
| 629 | unsigned reloc_done:1; |
| 630 | }; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 631 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 632 | |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 633 | #if defined(__mips__) |
| 634 | struct mips_hi16 |
| 635 | { |
| 636 | struct mips_hi16 *next; |
| 637 | Elf32_Addr *addr; |
| 638 | Elf32_Addr value; |
| 639 | }; |
| 640 | #endif |
| 641 | |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 642 | struct arch_file { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 643 | struct obj_file root; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 644 | #if defined(BB_USE_PLT_ENTRIES) |
| 645 | struct obj_section *plt; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 646 | #endif |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 647 | #if defined(BB_USE_GOT_ENTRIES) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 648 | struct obj_section *got; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 649 | #endif |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 650 | #if defined(__mips__) |
| 651 | struct mips_hi16 *mips_hi16_list; |
| 652 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 653 | }; |
| 654 | |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 655 | struct arch_symbol { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 656 | struct obj_symbol root; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 657 | #if defined(BB_USE_PLT_ENTRIES) |
| 658 | struct arch_plt_entry pltent; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 659 | #endif |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 660 | #if defined(BB_USE_GOT_ENTRIES) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 661 | struct arch_got_entry gotent; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 662 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 663 | }; |
| 664 | |
| 665 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 666 | struct external_module { |
| 667 | const char *name; |
| 668 | ElfW(Addr) addr; |
| 669 | int used; |
| 670 | size_t nsyms; |
| 671 | struct new_module_symbol *syms; |
| 672 | }; |
| 673 | |
| 674 | struct new_module_symbol *ksyms; |
| 675 | size_t nksyms; |
| 676 | |
| 677 | struct external_module *ext_modules; |
| 678 | int n_ext_modules; |
| 679 | int n_ext_modules_used; |
| 680 | |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 681 | |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 682 | extern int delete_module(const char *); |
Eric Andersen | a2a978a | 2001-04-05 06:08:14 +0000 | [diff] [blame] | 683 | |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 684 | |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 685 | /* This is kind of troublesome. See, we don't actually support |
| 686 | the m68k or the arm the same way we support i386 and (now) |
| 687 | sh. In doing my SH patch, I just assumed that whatever works |
| 688 | for i386 also works for m68k and arm since currently insmod.c |
| 689 | does nothing special for them. If this isn't true, the below |
| 690 | line is rather misleading IMHO, and someone should either |
| 691 | change it or add more proper architecture-dependent support |
| 692 | for these boys. |
| 693 | |
| 694 | -- Bryan Rittmeyer <bryan@ixiacom.com> */ |
| 695 | |
Eric Andersen | 23c1a18 | 2001-03-19 19:28:24 +0000 | [diff] [blame] | 696 | static char m_filename[BUFSIZ + 1]; |
| 697 | static char m_fullName[BUFSIZ + 1]; |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 698 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 699 | /*======================================================================*/ |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 700 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 701 | |
| 702 | static int findNamedModule(const char *fileName, struct stat *statbuf, |
| 703 | void *userDate) |
| 704 | { |
| 705 | char *fullName = (char *) userDate; |
| 706 | |
| 707 | |
| 708 | if (fullName[0] == '\0') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 709 | return (FALSE); |
| 710 | else { |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 711 | char *tmp = strrchr((char *) fileName, '/'); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 712 | |
| 713 | if (tmp == NULL) |
| 714 | tmp = (char *) fileName; |
| 715 | else |
| 716 | tmp++; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 717 | if (check_wildcard_match(tmp, fullName) == TRUE) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 718 | /* Stop searching if we find a match */ |
Eric Andersen | f227815 | 2001-04-24 21:41:41 +0000 | [diff] [blame] | 719 | safe_strncpy(m_filename, fileName, sizeof(m_filename)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 720 | return (FALSE); |
| 721 | } |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 722 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 723 | return (TRUE); |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 724 | } |
| 725 | |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 726 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 727 | /*======================================================================*/ |
| 728 | |
| 729 | struct obj_file *arch_new_file(void) |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 730 | { |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 731 | struct arch_file *f; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 732 | f = xmalloc(sizeof(*f)); |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 733 | |
| 734 | #if defined(BB_USE_PLT_ENTRIES) |
| 735 | f->plt = NULL; |
| 736 | #endif |
| 737 | #if defined(BB_USE_GOT_ENTRIES) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 738 | f->got = NULL; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 739 | #endif |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 740 | #if defined(__mips__) |
| 741 | f->mips_hi16_list = NULL; |
| 742 | #endif |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 743 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 744 | return &f->root; |
| 745 | } |
| 746 | |
| 747 | struct obj_section *arch_new_section(void) |
| 748 | { |
| 749 | return xmalloc(sizeof(struct obj_section)); |
| 750 | } |
| 751 | |
| 752 | struct obj_symbol *arch_new_symbol(void) |
| 753 | { |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 754 | struct arch_symbol *sym; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 755 | sym = xmalloc(sizeof(*sym)); |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 756 | |
| 757 | #if defined(BB_USE_PLT_ENTRIES) |
| 758 | memset(&sym->pltent, 0, sizeof(sym->pltent)); |
| 759 | #endif |
| 760 | #if defined(BB_USE_GOT_ENTRIES) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 761 | memset(&sym->gotent, 0, sizeof(sym->gotent)); |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 762 | #endif |
| 763 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 764 | return &sym->root; |
| 765 | } |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 766 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 767 | enum obj_reloc |
| 768 | arch_apply_relocation(struct obj_file *f, |
| 769 | struct obj_section *targsec, |
| 770 | struct obj_section *symsec, |
| 771 | struct obj_symbol *sym, |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 772 | ElfW(RelM) *rel, ElfW(Addr) v) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 773 | { |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 774 | struct arch_file *ifile = (struct arch_file *) f; |
Eric Andersen | 82bb8a2 | 2001-03-22 19:01:16 +0000 | [diff] [blame] | 775 | #if !(defined(__mips__)) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 776 | struct arch_symbol *isym = (struct arch_symbol *) sym; |
Eric Andersen | 82bb8a2 | 2001-03-22 19:01:16 +0000 | [diff] [blame] | 777 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 778 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 779 | ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset); |
| 780 | ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 781 | #if defined(BB_USE_GOT_ENTRIES) |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 782 | ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 783 | #endif |
| 784 | #if defined(BB_USE_PLT_ENTRIES) |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 785 | ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 786 | struct arch_plt_entry *pe; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 787 | unsigned long *ip; |
| 788 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 789 | enum obj_reloc ret = obj_reloc_ok; |
| 790 | |
| 791 | switch (ELF32_R_TYPE(rel->r_info)) { |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 792 | |
| 793 | /* even though these constants seem to be the same for |
| 794 | the i386 and the sh, we "#if define" them for clarity |
| 795 | and in case that ever changes */ |
| 796 | #if defined(__sh__) |
| 797 | case R_SH_NONE: |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 798 | #elif defined(__arm__) |
| 799 | case R_ARM_NONE: |
| 800 | #elif defined(__i386__) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 801 | case R_386_NONE: |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 802 | #elif defined(__powerpc__) |
| 803 | case R_PPC_NONE: |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 804 | #elif defined(__mips__) |
| 805 | case R_MIPS_NONE: |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 806 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 807 | break; |
| 808 | |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 809 | #if defined(__sh__) |
| 810 | case R_SH_DIR32: |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 811 | #elif defined(__arm__) |
| 812 | case R_ARM_ABS32: |
| 813 | #elif defined(__i386__) |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 814 | case R_386_32: |
| 815 | #elif defined(__powerpc__) |
| 816 | case R_PPC_ADDR32: |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 817 | #elif defined(__mips__) |
| 818 | case R_MIPS_32: |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 819 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 820 | *loc += v; |
| 821 | break; |
| 822 | |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 823 | #if defined(__powerpc__) |
| 824 | case R_PPC_ADDR16_HA: |
| 825 | *(unsigned short *)loc = (v + 0x8000) >> 16; |
| 826 | break; |
| 827 | |
| 828 | case R_PPC_ADDR16_HI: |
| 829 | *(unsigned short *)loc = v >> 16; |
| 830 | break; |
| 831 | |
| 832 | case R_PPC_ADDR16_LO: |
| 833 | *(unsigned short *)loc = v; |
| 834 | break; |
| 835 | #endif |
| 836 | |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 837 | #if defined(__mips__) |
| 838 | case R_MIPS_26: |
| 839 | if (v % 4) |
| 840 | ret = obj_reloc_dangerous; |
| 841 | if ((v & 0xf0000000) != ((dot + 4) & 0xf0000000)) |
| 842 | ret = obj_reloc_overflow; |
| 843 | *loc = |
| 844 | (*loc & ~0x03ffffff) | ((*loc + (v >> 2)) & |
| 845 | 0x03ffffff); |
| 846 | break; |
| 847 | |
| 848 | case R_MIPS_HI16: |
| 849 | { |
| 850 | struct mips_hi16 *n; |
| 851 | |
| 852 | /* We cannot relocate this one now because we don't know the value |
| 853 | of the carry we need to add. Save the information, and let LO16 |
| 854 | do the actual relocation. */ |
| 855 | n = (struct mips_hi16 *) xmalloc(sizeof *n); |
| 856 | n->addr = loc; |
| 857 | n->value = v; |
| 858 | n->next = ifile->mips_hi16_list; |
| 859 | ifile->mips_hi16_list = n; |
| 860 | break; |
| 861 | } |
| 862 | |
| 863 | case R_MIPS_LO16: |
| 864 | { |
| 865 | unsigned long insnlo = *loc; |
| 866 | Elf32_Addr val, vallo; |
| 867 | |
| 868 | /* Sign extend the addend we extract from the lo insn. */ |
| 869 | vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; |
| 870 | |
| 871 | if (ifile->mips_hi16_list != NULL) { |
| 872 | struct mips_hi16 *l; |
| 873 | |
| 874 | l = ifile->mips_hi16_list; |
| 875 | while (l != NULL) { |
| 876 | struct mips_hi16 *next; |
| 877 | unsigned long insn; |
| 878 | |
| 879 | /* The value for the HI16 had best be the same. */ |
| 880 | assert(v == l->value); |
| 881 | |
| 882 | /* Do the HI16 relocation. Note that we actually don't |
| 883 | need to know anything about the LO16 itself, except where |
| 884 | to find the low 16 bits of the addend needed by the LO16. */ |
| 885 | insn = *l->addr; |
| 886 | val = |
| 887 | ((insn & 0xffff) << 16) + |
| 888 | vallo; |
| 889 | val += v; |
| 890 | |
| 891 | /* Account for the sign extension that will happen in the |
| 892 | low bits. */ |
| 893 | val = |
| 894 | ((val >> 16) + |
| 895 | ((val & 0x8000) != |
| 896 | 0)) & 0xffff; |
| 897 | |
| 898 | insn = (insn & ~0xffff) | val; |
| 899 | *l->addr = insn; |
| 900 | |
| 901 | next = l->next; |
| 902 | free(l); |
| 903 | l = next; |
| 904 | } |
| 905 | |
| 906 | ifile->mips_hi16_list = NULL; |
| 907 | } |
| 908 | |
| 909 | /* Ok, we're done with the HI16 relocs. Now deal with the LO16. */ |
| 910 | val = v + vallo; |
| 911 | insnlo = (insnlo & ~0xffff) | (val & 0xffff); |
| 912 | *loc = insnlo; |
| 913 | break; |
| 914 | } |
| 915 | #endif |
| 916 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 917 | #if defined(__arm__) |
| 918 | #elif defined(__sh__) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 919 | case R_SH_REL32: |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 920 | *loc += v - dot; |
| 921 | break; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 922 | #elif defined(__i386__) |
| 923 | case R_386_PLT32: |
| 924 | case R_386_PC32: |
| 925 | *loc += v - dot; |
| 926 | break; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 927 | #elif defined(__powerpc__) |
| 928 | case R_PPC_REL32: |
| 929 | *loc = v - dot; |
| 930 | break; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 931 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 932 | |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 933 | #if defined(__sh__) |
| 934 | case R_SH_PLT32: |
| 935 | *loc = v - dot; |
| 936 | break; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 937 | #elif defined(__i386__) |
| 938 | #endif |
| 939 | |
| 940 | #if defined(BB_USE_PLT_ENTRIES) |
| 941 | |
| 942 | #if defined(__arm__) |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 943 | case R_ARM_PC24: |
| 944 | case R_ARM_PLT32: |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 945 | #endif |
| 946 | #if defined(__powerpc__) |
| 947 | case R_PPC_REL24: |
| 948 | #endif |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 949 | /* find the plt entry and initialize it if necessary */ |
| 950 | assert(isym != NULL); |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 951 | |
| 952 | pe = (struct arch_plt_entry*) &isym->pltent; |
| 953 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 954 | if (! pe->inited) { |
| 955 | ip = (unsigned long *) (ifile->plt->contents + pe->offset); |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 956 | |
| 957 | /* generate some machine code */ |
| 958 | |
| 959 | #if defined(__arm__) |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 960 | ip[0] = 0xe51ff004; /* ldr pc,[pc,#-4] */ |
| 961 | ip[1] = v; /* sym@ */ |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 962 | #endif |
| 963 | #if defined(__powerpc__) |
| 964 | ip[0] = 0x3d600000 + ((v + 0x8000) >> 16); /* lis r11,sym@ha */ |
| 965 | ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */ |
| 966 | ip[2] = 0x7d6903a6; /* mtctr r11 */ |
| 967 | ip[3] = 0x4e800420; /* bctr */ |
| 968 | #endif |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 969 | pe->inited = 1; |
| 970 | } |
| 971 | |
| 972 | /* relative distance to target */ |
| 973 | v -= dot; |
| 974 | /* if the target is too far away.... */ |
| 975 | if ((int)v < -0x02000000 || (int)v >= 0x02000000) { |
| 976 | /* go via the plt */ |
| 977 | v = plt + pe->offset - dot; |
| 978 | } |
| 979 | if (v & 3) |
| 980 | ret = obj_reloc_dangerous; |
| 981 | |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 982 | /* merge the offset into the instruction. */ |
| 983 | #if defined(__arm__) |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 984 | /* Convert to words. */ |
| 985 | v >>= 2; |
| 986 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 987 | *loc = (*loc & ~0x00ffffff) | ((v + *loc) & 0x00ffffff); |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 988 | #endif |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 989 | #if defined(__powerpc__) |
| 990 | *loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc); |
| 991 | #endif |
| 992 | break; |
| 993 | #endif /* BB_USE_PLT_ENTRIES */ |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 994 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 995 | #if defined(__arm__) |
| 996 | #elif defined(__sh__) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 997 | case R_SH_GLOB_DAT: |
| 998 | case R_SH_JMP_SLOT: |
| 999 | *loc = v; |
| 1000 | break; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1001 | #elif defined(__i386__) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1002 | case R_386_GLOB_DAT: |
| 1003 | case R_386_JMP_SLOT: |
| 1004 | *loc = v; |
| 1005 | break; |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1006 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1007 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1008 | #if defined(__arm__) |
| 1009 | #elif defined(__sh__) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1010 | case R_SH_RELATIVE: |
| 1011 | *loc += f->baseaddr + rel->r_addend; |
| 1012 | break; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1013 | #elif defined(__i386__) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1014 | case R_386_RELATIVE: |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1015 | *loc += f->baseaddr; |
| 1016 | break; |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1017 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1018 | |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1019 | #if defined(BB_USE_GOT_ENTRIES) |
| 1020 | |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1021 | #if defined(__sh__) |
| 1022 | case R_SH_GOTPC: |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1023 | #elif defined(__arm__) |
| 1024 | case R_ARM_GOTPC: |
| 1025 | #elif defined(__i386__) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1026 | case R_386_GOTPC: |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1027 | #endif |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1028 | assert(got != 0); |
| 1029 | #if defined(__sh__) |
| 1030 | *loc += got - dot + rel->r_addend;; |
| 1031 | #elif defined(__i386__) || defined(__arm__) |
| 1032 | *loc += got - dot; |
| 1033 | #endif |
| 1034 | break; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1035 | |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1036 | #if defined(__sh__) |
| 1037 | case R_SH_GOT32: |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1038 | #elif defined(__arm__) |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1039 | case R_ARM_GOT32: |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1040 | #elif defined(__i386__) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1041 | case R_386_GOT32: |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1042 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1043 | assert(isym != NULL); |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1044 | /* needs an entry in the .got: set it, once */ |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1045 | if (!isym->gotent.reloc_done) { |
| 1046 | isym->gotent.reloc_done = 1; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1047 | *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1048 | } |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1049 | /* make the reloc with_respect_to_.got */ |
| 1050 | #if defined(__sh__) |
| 1051 | *loc += isym->gotent.offset + rel->r_addend; |
| 1052 | #elif defined(__i386__) || defined(__arm__) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1053 | *loc += isym->gotent.offset; |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1054 | #endif |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1055 | break; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1056 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1057 | /* address relative to the got */ |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1058 | #if defined(__sh__) |
| 1059 | case R_SH_GOTOFF: |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1060 | #elif defined(__arm__) |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1061 | case R_ARM_GOTOFF: |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1062 | #elif defined(__i386__) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1063 | case R_386_GOTOFF: |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1064 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1065 | assert(got != 0); |
| 1066 | *loc += v - got; |
| 1067 | break; |
| 1068 | |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1069 | #endif /* BB_USE_GOT_ENTRIES */ |
| 1070 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1071 | default: |
Eric Andersen | 2112554 | 2000-12-13 16:41:29 +0000 | [diff] [blame] | 1072 | printf("Warning: unhandled reloc %d\n",(int)ELF32_R_TYPE(rel->r_info)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1073 | ret = obj_reloc_unhandled; |
| 1074 | break; |
| 1075 | } |
| 1076 | |
| 1077 | return ret; |
| 1078 | } |
| 1079 | |
| 1080 | int arch_create_got(struct obj_file *f) |
| 1081 | { |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 1082 | #if defined(BB_USE_GOT_ENTRIES) || defined(BB_USE_PLT_ENTRIES) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1083 | struct arch_file *ifile = (struct arch_file *) f; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1084 | int i; |
| 1085 | #if defined(BB_USE_GOT_ENTRIES) |
| 1086 | int got_offset = 0, gotneeded = 0; |
| 1087 | #endif |
| 1088 | #if defined(BB_USE_PLT_ENTRIES) |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1089 | int plt_offset = 0, pltneeded = 0; |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1090 | #endif |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1091 | struct obj_section *relsec, *symsec, *strsec; |
| 1092 | ElfW(RelM) *rel, *relend; |
| 1093 | ElfW(Sym) *symtab, *extsym; |
| 1094 | const char *strtab, *name; |
| 1095 | struct arch_symbol *intsym; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1096 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1097 | for (i = 0; i < f->header.e_shnum; ++i) { |
| 1098 | relsec = f->sections[i]; |
| 1099 | if (relsec->header.sh_type != SHT_RELM) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1100 | continue; |
| 1101 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1102 | symsec = f->sections[relsec->header.sh_link]; |
| 1103 | strsec = f->sections[symsec->header.sh_link]; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1104 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1105 | rel = (ElfW(RelM) *) relsec->contents; |
| 1106 | relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); |
| 1107 | symtab = (ElfW(Sym) *) symsec->contents; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1108 | strtab = (const char *) strsec->contents; |
| 1109 | |
| 1110 | for (; rel < relend; ++rel) { |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1111 | extsym = &symtab[ELF32_R_SYM(rel->r_info)]; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1112 | |
| 1113 | switch (ELF32_R_TYPE(rel->r_info)) { |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1114 | #if defined(__arm__) |
| 1115 | case R_ARM_GOT32: |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1116 | break; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1117 | #elif defined(__sh__) |
Eric Andersen | fe4208f | 2000-09-24 03:44:29 +0000 | [diff] [blame] | 1118 | case R_SH_GOT32: |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1119 | break; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1120 | #elif defined(__i386__) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1121 | case R_386_GOT32: |
| 1122 | break; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1123 | #endif |
| 1124 | |
| 1125 | #if defined(__powerpc__) |
| 1126 | case R_PPC_REL24: |
| 1127 | pltneeded = 1; |
| 1128 | break; |
| 1129 | #endif |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1130 | |
| 1131 | #if defined(__arm__) |
| 1132 | case R_ARM_PC24: |
| 1133 | case R_ARM_PLT32: |
| 1134 | pltneeded = 1; |
| 1135 | break; |
| 1136 | |
| 1137 | case R_ARM_GOTPC: |
| 1138 | case R_ARM_GOTOFF: |
| 1139 | gotneeded = 1; |
| 1140 | if (got_offset == 0) |
| 1141 | got_offset = 4; |
| 1142 | #elif defined(__sh__) |
| 1143 | case R_SH_GOTPC: |
| 1144 | case R_SH_GOTOFF: |
| 1145 | gotneeded = 1; |
| 1146 | #elif defined(__i386__) |
| 1147 | case R_386_GOTPC: |
| 1148 | case R_386_GOTOFF: |
| 1149 | gotneeded = 1; |
| 1150 | #endif |
| 1151 | |
| 1152 | default: |
| 1153 | continue; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1154 | } |
| 1155 | |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1156 | if (extsym->st_name != 0) { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1157 | name = strtab + extsym->st_name; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1158 | } else { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1159 | name = f->sections[extsym->st_shndx]->name; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1160 | } |
| 1161 | intsym = (struct arch_symbol *) obj_find_symbol(f, name); |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1162 | #if defined(BB_USE_GOT_ENTRIES) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1163 | if (!intsym->gotent.offset_done) { |
| 1164 | intsym->gotent.offset_done = 1; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1165 | intsym->gotent.offset = got_offset; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1166 | got_offset += BB_GOT_ENTRY_SIZE; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1167 | } |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1168 | #endif |
| 1169 | #if defined(BB_USE_PLT_ENTRIES) |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1170 | if (pltneeded && intsym->pltent.allocated == 0) { |
| 1171 | intsym->pltent.allocated = 1; |
| 1172 | intsym->pltent.offset = plt_offset; |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1173 | plt_offset += BB_PLT_ENTRY_SIZE; |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1174 | intsym->pltent.inited = 0; |
| 1175 | pltneeded = 0; |
| 1176 | } |
| 1177 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1178 | } |
| 1179 | } |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1180 | |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1181 | #if defined(BB_USE_GOT_ENTRIES) |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1182 | if (got_offset) { |
Eric Andersen | e76c3b0 | 2001-04-05 03:14:39 +0000 | [diff] [blame] | 1183 | struct obj_section* myrelsec = obj_find_section(f, ".got"); |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1184 | |
Eric Andersen | e76c3b0 | 2001-04-05 03:14:39 +0000 | [diff] [blame] | 1185 | if (myrelsec) { |
| 1186 | obj_extend_section(myrelsec, got_offset); |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1187 | } else { |
Eric Andersen | e76c3b0 | 2001-04-05 03:14:39 +0000 | [diff] [blame] | 1188 | myrelsec = obj_create_alloced_section(f, ".got", |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1189 | BB_GOT_ENTRY_SIZE, |
| 1190 | got_offset); |
Eric Andersen | e76c3b0 | 2001-04-05 03:14:39 +0000 | [diff] [blame] | 1191 | assert(myrelsec); |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1192 | } |
| 1193 | |
Eric Andersen | e76c3b0 | 2001-04-05 03:14:39 +0000 | [diff] [blame] | 1194 | ifile->got = myrelsec; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1195 | } |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 1196 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1197 | |
Eric Andersen | 90fe7fe | 2001-02-20 20:47:08 +0000 | [diff] [blame] | 1198 | #if defined(BB_USE_PLT_ENTRIES) |
| 1199 | if (plt_offset) |
| 1200 | ifile->plt = obj_create_alloced_section(f, ".plt", |
| 1201 | BB_PLT_ENTRY_SIZE, |
| 1202 | plt_offset); |
| 1203 | #endif |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 1204 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1205 | return 1; |
| 1206 | } |
| 1207 | |
| 1208 | int arch_init_module(struct obj_file *f, struct new_module *mod) |
| 1209 | { |
| 1210 | return 1; |
| 1211 | } |
| 1212 | |
| 1213 | |
| 1214 | /*======================================================================*/ |
| 1215 | |
| 1216 | /* Standard ELF hash function. */ |
| 1217 | inline unsigned long obj_elf_hash_n(const char *name, unsigned long n) |
| 1218 | { |
| 1219 | unsigned long h = 0; |
| 1220 | unsigned long g; |
| 1221 | unsigned char ch; |
| 1222 | |
| 1223 | while (n > 0) { |
| 1224 | ch = *name++; |
| 1225 | h = (h << 4) + ch; |
| 1226 | if ((g = (h & 0xf0000000)) != 0) { |
| 1227 | h ^= g >> 24; |
| 1228 | h &= ~g; |
| 1229 | } |
| 1230 | n--; |
| 1231 | } |
| 1232 | return h; |
| 1233 | } |
| 1234 | |
| 1235 | unsigned long obj_elf_hash(const char *name) |
| 1236 | { |
| 1237 | return obj_elf_hash_n(name, strlen(name)); |
| 1238 | } |
| 1239 | |
| 1240 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 1241 | /* Get the kernel version in the canonical integer form. */ |
| 1242 | |
| 1243 | static int get_kernel_version(char str[STRVERSIONLEN]) |
| 1244 | { |
| 1245 | struct utsname uts_info; |
| 1246 | char *p, *q; |
| 1247 | int a, b, c; |
| 1248 | |
| 1249 | if (uname(&uts_info) < 0) |
| 1250 | return -1; |
| 1251 | strncpy(str, uts_info.release, STRVERSIONLEN); |
| 1252 | p = uts_info.release; |
| 1253 | |
| 1254 | a = strtoul(p, &p, 10); |
| 1255 | if (*p != '.') |
| 1256 | return -1; |
| 1257 | b = strtoul(p + 1, &p, 10); |
| 1258 | if (*p != '.') |
| 1259 | return -1; |
| 1260 | c = strtoul(p + 1, &q, 10); |
| 1261 | if (p + 1 == q) |
| 1262 | return -1; |
| 1263 | |
| 1264 | return a << 16 | b << 8 | c; |
| 1265 | } |
| 1266 | |
| 1267 | /* String comparison for non-co-versioned kernel and module. */ |
| 1268 | |
| 1269 | static int ncv_strcmp(const char *a, const char *b) |
| 1270 | { |
| 1271 | size_t alen = strlen(a), blen = strlen(b); |
| 1272 | |
| 1273 | if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R') |
| 1274 | return strncmp(a, b, alen); |
| 1275 | else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R') |
| 1276 | return strncmp(a, b, blen); |
| 1277 | else |
| 1278 | return strcmp(a, b); |
| 1279 | } |
| 1280 | |
| 1281 | /* String hashing for non-co-versioned kernel and module. Here |
| 1282 | we are simply forced to drop the crc from the hash. */ |
| 1283 | |
| 1284 | static unsigned long ncv_symbol_hash(const char *str) |
| 1285 | { |
| 1286 | size_t len = strlen(str); |
| 1287 | if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R') |
| 1288 | len -= 10; |
| 1289 | return obj_elf_hash_n(str, len); |
| 1290 | } |
| 1291 | |
| 1292 | void |
| 1293 | obj_set_symbol_compare(struct obj_file *f, |
| 1294 | int (*cmp) (const char *, const char *), |
| 1295 | unsigned long (*hash) (const char *)) |
| 1296 | { |
| 1297 | if (cmp) |
| 1298 | f->symbol_cmp = cmp; |
| 1299 | if (hash) { |
| 1300 | struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next; |
| 1301 | int i; |
| 1302 | |
| 1303 | f->symbol_hash = hash; |
| 1304 | |
| 1305 | memcpy(tmptab, f->symtab, sizeof(tmptab)); |
| 1306 | memset(f->symtab, 0, sizeof(f->symtab)); |
| 1307 | |
| 1308 | for (i = 0; i < HASH_BUCKETS; ++i) |
| 1309 | for (sym = tmptab[i]; sym; sym = next) { |
| 1310 | unsigned long h = hash(sym->name) % HASH_BUCKETS; |
| 1311 | next = sym->next; |
| 1312 | sym->next = f->symtab[h]; |
| 1313 | f->symtab[h] = sym; |
| 1314 | } |
| 1315 | } |
| 1316 | } |
| 1317 | |
| 1318 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 1319 | |
| 1320 | |
| 1321 | struct obj_symbol *obj_add_symbol(struct obj_file *f, const char *name, |
| 1322 | unsigned long symidx, int info, |
| 1323 | int secidx, ElfW(Addr) value, |
| 1324 | unsigned long size) |
| 1325 | { |
| 1326 | struct obj_symbol *sym; |
| 1327 | unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; |
| 1328 | int n_type = ELFW(ST_TYPE) (info); |
| 1329 | int n_binding = ELFW(ST_BIND) (info); |
| 1330 | |
| 1331 | for (sym = f->symtab[hash]; sym; sym = sym->next) |
| 1332 | if (f->symbol_cmp(sym->name, name) == 0) { |
| 1333 | int o_secidx = sym->secidx; |
| 1334 | int o_info = sym->info; |
| 1335 | int o_type = ELFW(ST_TYPE) (o_info); |
| 1336 | int o_binding = ELFW(ST_BIND) (o_info); |
| 1337 | |
| 1338 | /* A redefinition! Is it legal? */ |
| 1339 | |
| 1340 | if (secidx == SHN_UNDEF) |
| 1341 | return sym; |
| 1342 | else if (o_secidx == SHN_UNDEF) |
| 1343 | goto found; |
| 1344 | else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) { |
| 1345 | /* Cope with local and global symbols of the same name |
| 1346 | in the same object file, as might have been created |
| 1347 | by ld -r. The only reason locals are now seen at this |
| 1348 | level at all is so that we can do semi-sensible things |
| 1349 | with parameters. */ |
| 1350 | |
| 1351 | struct obj_symbol *nsym, **p; |
| 1352 | |
| 1353 | nsym = arch_new_symbol(); |
| 1354 | nsym->next = sym->next; |
| 1355 | nsym->ksymidx = -1; |
| 1356 | |
| 1357 | /* Excise the old (local) symbol from the hash chain. */ |
| 1358 | for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next) |
| 1359 | continue; |
| 1360 | *p = sym = nsym; |
| 1361 | goto found; |
| 1362 | } else if (n_binding == STB_LOCAL) { |
| 1363 | /* Another symbol of the same name has already been defined. |
| 1364 | Just add this to the local table. */ |
| 1365 | sym = arch_new_symbol(); |
| 1366 | sym->next = NULL; |
| 1367 | sym->ksymidx = -1; |
| 1368 | f->local_symtab[symidx] = sym; |
| 1369 | goto found; |
| 1370 | } else if (n_binding == STB_WEAK) |
| 1371 | return sym; |
| 1372 | else if (o_binding == STB_WEAK) |
| 1373 | goto found; |
| 1374 | /* Don't unify COMMON symbols with object types the programmer |
| 1375 | doesn't expect. */ |
| 1376 | else if (secidx == SHN_COMMON |
| 1377 | && (o_type == STT_NOTYPE || o_type == STT_OBJECT)) |
| 1378 | return sym; |
| 1379 | else if (o_secidx == SHN_COMMON |
| 1380 | && (n_type == STT_NOTYPE || n_type == STT_OBJECT)) |
| 1381 | goto found; |
| 1382 | else { |
| 1383 | /* Don't report an error if the symbol is coming from |
| 1384 | the kernel or some external module. */ |
| 1385 | if (secidx <= SHN_HIRESERVE) |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 1386 | error_msg("%s multiply defined", name); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1387 | return sym; |
| 1388 | } |
| 1389 | } |
| 1390 | |
| 1391 | /* Completely new symbol. */ |
| 1392 | sym = arch_new_symbol(); |
| 1393 | sym->next = f->symtab[hash]; |
| 1394 | f->symtab[hash] = sym; |
| 1395 | sym->ksymidx = -1; |
| 1396 | |
| 1397 | if (ELFW(ST_BIND) (info) == STB_LOCAL) |
| 1398 | f->local_symtab[symidx] = sym; |
| 1399 | |
| 1400 | found: |
| 1401 | sym->name = name; |
| 1402 | sym->value = value; |
| 1403 | sym->size = size; |
| 1404 | sym->secidx = secidx; |
| 1405 | sym->info = info; |
| 1406 | |
| 1407 | return sym; |
| 1408 | } |
| 1409 | |
| 1410 | struct obj_symbol *obj_find_symbol(struct obj_file *f, const char *name) |
| 1411 | { |
| 1412 | struct obj_symbol *sym; |
| 1413 | unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; |
| 1414 | |
| 1415 | for (sym = f->symtab[hash]; sym; sym = sym->next) |
| 1416 | if (f->symbol_cmp(sym->name, name) == 0) |
| 1417 | return sym; |
| 1418 | |
| 1419 | return NULL; |
| 1420 | } |
| 1421 | |
| 1422 | ElfW(Addr) |
| 1423 | obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym) |
| 1424 | { |
| 1425 | if (sym) { |
| 1426 | if (sym->secidx >= SHN_LORESERVE) |
| 1427 | return sym->value; |
| 1428 | |
| 1429 | return sym->value + f->sections[sym->secidx]->header.sh_addr; |
| 1430 | } else { |
| 1431 | /* As a special case, a NULL sym has value zero. */ |
| 1432 | return 0; |
| 1433 | } |
| 1434 | } |
| 1435 | |
| 1436 | struct obj_section *obj_find_section(struct obj_file *f, const char *name) |
| 1437 | { |
| 1438 | int i, n = f->header.e_shnum; |
| 1439 | |
| 1440 | for (i = 0; i < n; ++i) |
| 1441 | if (strcmp(f->sections[i]->name, name) == 0) |
| 1442 | return f->sections[i]; |
| 1443 | |
| 1444 | return NULL; |
| 1445 | } |
| 1446 | |
| 1447 | static int obj_load_order_prio(struct obj_section *a) |
| 1448 | { |
| 1449 | unsigned long af, ac; |
| 1450 | |
| 1451 | af = a->header.sh_flags; |
| 1452 | |
| 1453 | ac = 0; |
| 1454 | if (a->name[0] != '.' || strlen(a->name) != 10 || |
| 1455 | strcmp(a->name + 5, ".init")) |
| 1456 | ac |= 32; |
| 1457 | if (af & SHF_ALLOC) |
| 1458 | ac |= 16; |
| 1459 | if (!(af & SHF_WRITE)) |
| 1460 | ac |= 8; |
| 1461 | if (af & SHF_EXECINSTR) |
| 1462 | ac |= 4; |
| 1463 | if (a->header.sh_type != SHT_NOBITS) |
| 1464 | ac |= 2; |
| 1465 | |
| 1466 | return ac; |
| 1467 | } |
| 1468 | |
| 1469 | void |
| 1470 | obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec) |
| 1471 | { |
| 1472 | struct obj_section **p; |
| 1473 | int prio = obj_load_order_prio(sec); |
| 1474 | for (p = f->load_order_search_start; *p; p = &(*p)->load_next) |
| 1475 | if (obj_load_order_prio(*p) < prio) |
| 1476 | break; |
| 1477 | sec->load_next = *p; |
| 1478 | *p = sec; |
| 1479 | } |
| 1480 | |
| 1481 | struct obj_section *obj_create_alloced_section(struct obj_file *f, |
| 1482 | const char *name, |
| 1483 | unsigned long align, |
| 1484 | unsigned long size) |
| 1485 | { |
| 1486 | int newidx = f->header.e_shnum++; |
| 1487 | struct obj_section *sec; |
| 1488 | |
| 1489 | f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec)); |
| 1490 | f->sections[newidx] = sec = arch_new_section(); |
| 1491 | |
| 1492 | memset(sec, 0, sizeof(*sec)); |
| 1493 | sec->header.sh_type = SHT_PROGBITS; |
| 1494 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; |
| 1495 | sec->header.sh_size = size; |
| 1496 | sec->header.sh_addralign = align; |
| 1497 | sec->name = name; |
| 1498 | sec->idx = newidx; |
| 1499 | if (size) |
| 1500 | sec->contents = xmalloc(size); |
| 1501 | |
| 1502 | obj_insert_section_load_order(f, sec); |
| 1503 | |
| 1504 | return sec; |
| 1505 | } |
| 1506 | |
| 1507 | struct obj_section *obj_create_alloced_section_first(struct obj_file *f, |
| 1508 | const char *name, |
| 1509 | unsigned long align, |
| 1510 | unsigned long size) |
| 1511 | { |
| 1512 | int newidx = f->header.e_shnum++; |
| 1513 | struct obj_section *sec; |
| 1514 | |
| 1515 | f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec)); |
| 1516 | f->sections[newidx] = sec = arch_new_section(); |
| 1517 | |
| 1518 | memset(sec, 0, sizeof(*sec)); |
| 1519 | sec->header.sh_type = SHT_PROGBITS; |
| 1520 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; |
| 1521 | sec->header.sh_size = size; |
| 1522 | sec->header.sh_addralign = align; |
| 1523 | sec->name = name; |
| 1524 | sec->idx = newidx; |
| 1525 | if (size) |
| 1526 | sec->contents = xmalloc(size); |
| 1527 | |
| 1528 | sec->load_next = f->load_order; |
| 1529 | f->load_order = sec; |
| 1530 | if (f->load_order_search_start == &f->load_order) |
| 1531 | f->load_order_search_start = &sec->load_next; |
| 1532 | |
| 1533 | return sec; |
| 1534 | } |
| 1535 | |
| 1536 | void *obj_extend_section(struct obj_section *sec, unsigned long more) |
| 1537 | { |
| 1538 | unsigned long oldsize = sec->header.sh_size; |
| 1539 | sec->contents = xrealloc(sec->contents, sec->header.sh_size += more); |
| 1540 | return sec->contents + oldsize; |
| 1541 | } |
| 1542 | |
| 1543 | |
| 1544 | |
| 1545 | /* Conditionally add the symbols from the given symbol set to the |
| 1546 | new module. */ |
| 1547 | |
| 1548 | static int |
| 1549 | add_symbols_from( |
| 1550 | struct obj_file *f, |
| 1551 | int idx, struct new_module_symbol *syms, size_t nsyms) |
| 1552 | { |
| 1553 | struct new_module_symbol *s; |
| 1554 | size_t i; |
| 1555 | int used = 0; |
| 1556 | |
| 1557 | for (i = 0, s = syms; i < nsyms; ++i, ++s) { |
| 1558 | |
| 1559 | /* Only add symbols that are already marked external. If we |
| 1560 | override locals we may cause problems for argument initialization. |
| 1561 | We will also create a false dependency on the module. */ |
| 1562 | struct obj_symbol *sym; |
| 1563 | |
| 1564 | sym = obj_find_symbol(f, (char *) s->name); |
| 1565 | if (sym && !ELFW(ST_BIND) (sym->info) == STB_LOCAL) { |
| 1566 | sym = obj_add_symbol(f, (char *) s->name, -1, |
| 1567 | ELFW(ST_INFO) (STB_GLOBAL, STT_NOTYPE), |
| 1568 | idx, s->value, 0); |
| 1569 | /* Did our symbol just get installed? If so, mark the |
| 1570 | module as "used". */ |
| 1571 | if (sym->secidx == idx) |
| 1572 | used = 1; |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | return used; |
| 1577 | } |
| 1578 | |
| 1579 | static void add_kernel_symbols(struct obj_file *f) |
| 1580 | { |
| 1581 | struct external_module *m; |
Pavel Roskin | ff5a903 | 2000-07-14 16:23:32 +0000 | [diff] [blame] | 1582 | int i, nused = 0; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1583 | |
| 1584 | /* Add module symbols first. */ |
| 1585 | |
| 1586 | for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) |
| 1587 | if (m->nsyms |
| 1588 | && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, |
| 1589 | m->nsyms)) m->used = 1, ++nused; |
| 1590 | |
| 1591 | n_ext_modules_used = nused; |
| 1592 | |
| 1593 | /* And finally the symbols from the kernel proper. */ |
| 1594 | |
| 1595 | if (nksyms) |
| 1596 | add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms); |
| 1597 | } |
| 1598 | |
| 1599 | static char *get_modinfo_value(struct obj_file *f, const char *key) |
| 1600 | { |
| 1601 | struct obj_section *sec; |
| 1602 | char *p, *v, *n, *ep; |
| 1603 | size_t klen = strlen(key); |
| 1604 | |
| 1605 | sec = obj_find_section(f, ".modinfo"); |
| 1606 | if (sec == NULL) |
| 1607 | return NULL; |
| 1608 | p = sec->contents; |
| 1609 | ep = p + sec->header.sh_size; |
| 1610 | while (p < ep) { |
| 1611 | v = strchr(p, '='); |
| 1612 | n = strchr(p, '\0'); |
| 1613 | if (v) { |
Pavel Roskin | ff5a903 | 2000-07-14 16:23:32 +0000 | [diff] [blame] | 1614 | if (p + klen == v && strncmp(p, key, klen) == 0) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1615 | return v + 1; |
| 1616 | } else { |
Pavel Roskin | ff5a903 | 2000-07-14 16:23:32 +0000 | [diff] [blame] | 1617 | if (p + klen == n && strcmp(p, key) == 0) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1618 | return n; |
| 1619 | } |
| 1620 | p = n + 1; |
| 1621 | } |
| 1622 | |
| 1623 | return NULL; |
| 1624 | } |
| 1625 | |
| 1626 | |
| 1627 | /*======================================================================*/ |
| 1628 | /* Functions relating to module loading in pre 2.1 kernels. */ |
| 1629 | |
| 1630 | static int |
| 1631 | old_process_module_arguments(struct obj_file *f, int argc, char **argv) |
| 1632 | { |
| 1633 | while (argc > 0) { |
| 1634 | char *p, *q; |
| 1635 | struct obj_symbol *sym; |
| 1636 | int *loc; |
| 1637 | |
| 1638 | p = *argv; |
Eric Andersen | ef40aa8 | 2000-06-26 11:16:22 +0000 | [diff] [blame] | 1639 | if ((q = strchr(p, '=')) == NULL) { |
| 1640 | argc--; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1641 | continue; |
Eric Andersen | ef40aa8 | 2000-06-26 11:16:22 +0000 | [diff] [blame] | 1642 | } |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1643 | *q++ = '\0'; |
| 1644 | |
| 1645 | sym = obj_find_symbol(f, p); |
| 1646 | |
| 1647 | /* Also check that the parameter was not resolved from the kernel. */ |
| 1648 | if (sym == NULL || sym->secidx > SHN_HIRESERVE) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 1649 | error_msg("symbol for parameter %s not found", p); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1650 | return 0; |
| 1651 | } |
| 1652 | |
| 1653 | loc = (int *) (f->sections[sym->secidx]->contents + sym->value); |
| 1654 | |
| 1655 | /* Do C quoting if we begin with a ". */ |
| 1656 | if (*q == '"') { |
| 1657 | char *r, *str; |
| 1658 | |
| 1659 | str = alloca(strlen(q)); |
| 1660 | for (r = str, q++; *q != '"'; ++q, ++r) { |
| 1661 | if (*q == '\0') { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 1662 | error_msg("improperly terminated string argument for %s", p); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1663 | return 0; |
| 1664 | } else if (*q == '\\') |
| 1665 | switch (*++q) { |
| 1666 | case 'a': |
| 1667 | *r = '\a'; |
| 1668 | break; |
| 1669 | case 'b': |
| 1670 | *r = '\b'; |
| 1671 | break; |
| 1672 | case 'e': |
| 1673 | *r = '\033'; |
| 1674 | break; |
| 1675 | case 'f': |
| 1676 | *r = '\f'; |
| 1677 | break; |
| 1678 | case 'n': |
| 1679 | *r = '\n'; |
| 1680 | break; |
| 1681 | case 'r': |
| 1682 | *r = '\r'; |
| 1683 | break; |
| 1684 | case 't': |
| 1685 | *r = '\t'; |
| 1686 | break; |
| 1687 | |
| 1688 | case '0': |
| 1689 | case '1': |
| 1690 | case '2': |
| 1691 | case '3': |
| 1692 | case '4': |
| 1693 | case '5': |
| 1694 | case '6': |
| 1695 | case '7': |
| 1696 | { |
| 1697 | int c = *q - '0'; |
| 1698 | if (q[1] >= '0' && q[1] <= '7') { |
| 1699 | c = (c * 8) + *++q - '0'; |
| 1700 | if (q[1] >= '0' && q[1] <= '7') |
| 1701 | c = (c * 8) + *++q - '0'; |
| 1702 | } |
| 1703 | *r = c; |
| 1704 | } |
| 1705 | break; |
| 1706 | |
| 1707 | default: |
| 1708 | *r = *q; |
| 1709 | break; |
| 1710 | } else |
| 1711 | *r = *q; |
| 1712 | } |
| 1713 | *r = '\0'; |
| 1714 | obj_string_patch(f, sym->secidx, sym->value, str); |
| 1715 | } else if (*q >= '0' && *q <= '9') { |
| 1716 | do |
| 1717 | *loc++ = strtoul(q, &q, 0); |
| 1718 | while (*q++ == ','); |
| 1719 | } else { |
| 1720 | char *contents = f->sections[sym->secidx]->contents; |
Eric Andersen | e76c3b0 | 2001-04-05 03:14:39 +0000 | [diff] [blame] | 1721 | char *myloc = contents + sym->value; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1722 | char *r; /* To search for commas */ |
| 1723 | |
| 1724 | /* Break the string with comas */ |
| 1725 | while ((r = strchr(q, ',')) != (char *) NULL) { |
| 1726 | *r++ = '\0'; |
Eric Andersen | e76c3b0 | 2001-04-05 03:14:39 +0000 | [diff] [blame] | 1727 | obj_string_patch(f, sym->secidx, myloc - contents, q); |
| 1728 | myloc += sizeof(char *); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1729 | q = r; |
| 1730 | } |
| 1731 | |
| 1732 | /* last part */ |
Eric Andersen | e76c3b0 | 2001-04-05 03:14:39 +0000 | [diff] [blame] | 1733 | obj_string_patch(f, sym->secidx, myloc - contents, q); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1734 | } |
| 1735 | |
| 1736 | argc--, argv++; |
| 1737 | } |
| 1738 | |
| 1739 | return 1; |
| 1740 | } |
| 1741 | |
| 1742 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 1743 | static int old_is_module_checksummed(struct obj_file *f) |
| 1744 | { |
| 1745 | return obj_find_symbol(f, "Using_Versions") != NULL; |
| 1746 | } |
| 1747 | /* Get the module's kernel version in the canonical integer form. */ |
| 1748 | |
| 1749 | static int |
| 1750 | old_get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) |
| 1751 | { |
| 1752 | struct obj_symbol *sym; |
| 1753 | char *p, *q; |
| 1754 | int a, b, c; |
| 1755 | |
| 1756 | sym = obj_find_symbol(f, "kernel_version"); |
| 1757 | if (sym == NULL) |
| 1758 | return -1; |
| 1759 | |
| 1760 | p = f->sections[sym->secidx]->contents + sym->value; |
| 1761 | strncpy(str, p, STRVERSIONLEN); |
| 1762 | |
| 1763 | a = strtoul(p, &p, 10); |
| 1764 | if (*p != '.') |
| 1765 | return -1; |
| 1766 | b = strtoul(p + 1, &p, 10); |
| 1767 | if (*p != '.') |
| 1768 | return -1; |
| 1769 | c = strtoul(p + 1, &q, 10); |
| 1770 | if (p + 1 == q) |
| 1771 | return -1; |
| 1772 | |
| 1773 | return a << 16 | b << 8 | c; |
| 1774 | } |
| 1775 | |
| 1776 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 1777 | |
Eric Andersen | f5d5e77 | 2001-01-24 23:34:48 +0000 | [diff] [blame] | 1778 | #ifdef BB_FEATURE_OLD_MODULE_INTERFACE |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1779 | |
| 1780 | /* Fetch all the symbols and divvy them up as appropriate for the modules. */ |
| 1781 | |
Eric Andersen | 8c185f9 | 2000-09-22 00:38:07 +0000 | [diff] [blame] | 1782 | static int old_get_kernel_symbols(const char *m_name) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1783 | { |
| 1784 | struct old_kernel_sym *ks, *k; |
| 1785 | struct new_module_symbol *s; |
| 1786 | struct external_module *mod; |
| 1787 | int nks, nms, nmod, i; |
| 1788 | |
| 1789 | nks = get_kernel_syms(NULL); |
Eric Andersen | f227815 | 2001-04-24 21:41:41 +0000 | [diff] [blame] | 1790 | if (nks <= 0) { |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 1791 | if (nks) |
| 1792 | perror_msg("get_kernel_syms: %s", m_name); |
| 1793 | else |
| 1794 | error_msg("No kernel symbols"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1795 | return 0; |
| 1796 | } |
| 1797 | |
| 1798 | ks = k = xmalloc(nks * sizeof(*ks)); |
| 1799 | |
| 1800 | if (get_kernel_syms(ks) != nks) { |
| 1801 | perror("inconsistency with get_kernel_syms -- is someone else " |
| 1802 | "playing with modules?"); |
| 1803 | free(ks); |
| 1804 | return 0; |
| 1805 | } |
| 1806 | |
| 1807 | /* Collect the module information. */ |
| 1808 | |
| 1809 | mod = NULL; |
| 1810 | nmod = -1; |
| 1811 | |
| 1812 | while (k->name[0] == '#' && k->name[1]) { |
| 1813 | struct old_kernel_sym *k2; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1814 | |
| 1815 | /* Find out how many symbols this module has. */ |
| 1816 | for (k2 = k + 1; k2->name[0] != '#'; ++k2) |
| 1817 | continue; |
| 1818 | nms = k2 - k - 1; |
| 1819 | |
| 1820 | mod = xrealloc(mod, (++nmod + 1) * sizeof(*mod)); |
| 1821 | mod[nmod].name = k->name + 1; |
| 1822 | mod[nmod].addr = k->value; |
| 1823 | mod[nmod].used = 0; |
| 1824 | mod[nmod].nsyms = nms; |
| 1825 | mod[nmod].syms = s = (nms ? xmalloc(nms * sizeof(*s)) : NULL); |
| 1826 | |
| 1827 | for (i = 0, ++k; i < nms; ++i, ++s, ++k) { |
| 1828 | s->name = (unsigned long) k->name; |
| 1829 | s->value = k->value; |
| 1830 | } |
| 1831 | |
| 1832 | k = k2; |
| 1833 | } |
| 1834 | |
| 1835 | ext_modules = mod; |
| 1836 | n_ext_modules = nmod + 1; |
| 1837 | |
| 1838 | /* Now collect the symbols for the kernel proper. */ |
| 1839 | |
| 1840 | if (k->name[0] == '#') |
| 1841 | ++k; |
| 1842 | |
| 1843 | nksyms = nms = nks - (k - ks); |
| 1844 | ksyms = s = (nms ? xmalloc(nms * sizeof(*s)) : NULL); |
| 1845 | |
| 1846 | for (i = 0; i < nms; ++i, ++s, ++k) { |
| 1847 | s->name = (unsigned long) k->name; |
| 1848 | s->value = k->value; |
| 1849 | } |
| 1850 | |
| 1851 | return 1; |
| 1852 | } |
| 1853 | |
| 1854 | /* Return the kernel symbol checksum version, or zero if not used. */ |
| 1855 | |
| 1856 | static int old_is_kernel_checksummed(void) |
| 1857 | { |
| 1858 | /* Using_Versions is the first symbol. */ |
| 1859 | if (nksyms > 0 |
| 1860 | && strcmp((char *) ksyms[0].name, |
| 1861 | "Using_Versions") == 0) return ksyms[0].value; |
| 1862 | else |
| 1863 | return 0; |
| 1864 | } |
| 1865 | |
| 1866 | |
| 1867 | static int old_create_mod_use_count(struct obj_file *f) |
| 1868 | { |
| 1869 | struct obj_section *sec; |
| 1870 | |
| 1871 | sec = obj_create_alloced_section_first(f, ".moduse", sizeof(long), |
| 1872 | sizeof(long)); |
| 1873 | |
| 1874 | obj_add_symbol(f, "mod_use_count_", -1, |
| 1875 | ELFW(ST_INFO) (STB_LOCAL, STT_OBJECT), sec->idx, 0, |
| 1876 | sizeof(long)); |
| 1877 | |
| 1878 | return 1; |
| 1879 | } |
| 1880 | |
| 1881 | static int |
| 1882 | old_init_module(const char *m_name, struct obj_file *f, |
| 1883 | unsigned long m_size) |
| 1884 | { |
| 1885 | char *image; |
| 1886 | struct old_mod_routines routines; |
| 1887 | struct old_symbol_table *symtab; |
| 1888 | int ret; |
| 1889 | |
| 1890 | /* Create the symbol table */ |
| 1891 | { |
| 1892 | int nsyms = 0, strsize = 0, total; |
| 1893 | |
| 1894 | /* Size things first... */ |
| 1895 | if (flag_export) { |
| 1896 | int i; |
| 1897 | for (i = 0; i < HASH_BUCKETS; ++i) { |
| 1898 | struct obj_symbol *sym; |
| 1899 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 1900 | if (ELFW(ST_BIND) (sym->info) != STB_LOCAL |
| 1901 | && sym->secidx <= SHN_HIRESERVE) |
| 1902 | { |
| 1903 | sym->ksymidx = nsyms++; |
| 1904 | strsize += strlen(sym->name) + 1; |
| 1905 | } |
| 1906 | } |
| 1907 | } |
| 1908 | |
| 1909 | total = (sizeof(struct old_symbol_table) |
| 1910 | + nsyms * sizeof(struct old_module_symbol) |
| 1911 | + n_ext_modules_used * sizeof(struct old_module_ref) |
| 1912 | + strsize); |
| 1913 | symtab = xmalloc(total); |
| 1914 | symtab->size = total; |
| 1915 | symtab->n_symbols = nsyms; |
| 1916 | symtab->n_refs = n_ext_modules_used; |
| 1917 | |
| 1918 | if (flag_export && nsyms) { |
| 1919 | struct old_module_symbol *ksym; |
| 1920 | char *str; |
| 1921 | int i; |
| 1922 | |
| 1923 | ksym = symtab->symbol; |
| 1924 | str = ((char *) ksym + nsyms * sizeof(struct old_module_symbol) |
| 1925 | + n_ext_modules_used * sizeof(struct old_module_ref)); |
| 1926 | |
| 1927 | for (i = 0; i < HASH_BUCKETS; ++i) { |
| 1928 | struct obj_symbol *sym; |
| 1929 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 1930 | if (sym->ksymidx >= 0) { |
| 1931 | ksym->addr = obj_symbol_final_value(f, sym); |
| 1932 | ksym->name = |
| 1933 | (unsigned long) str - (unsigned long) symtab; |
| 1934 | |
Matt Kraai | 70a7855 | 2001-01-04 02:00:17 +0000 | [diff] [blame] | 1935 | strcpy(str, sym->name); |
| 1936 | str += strlen(sym->name) + 1; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1937 | ksym++; |
| 1938 | } |
| 1939 | } |
| 1940 | } |
| 1941 | |
| 1942 | if (n_ext_modules_used) { |
| 1943 | struct old_module_ref *ref; |
| 1944 | int i; |
| 1945 | |
| 1946 | ref = (struct old_module_ref *) |
| 1947 | ((char *) symtab->symbol + nsyms * sizeof(struct old_module_symbol)); |
| 1948 | |
| 1949 | for (i = 0; i < n_ext_modules; ++i) |
| 1950 | if (ext_modules[i].used) |
| 1951 | ref++->module = ext_modules[i].addr; |
| 1952 | } |
| 1953 | } |
| 1954 | |
| 1955 | /* Fill in routines. */ |
| 1956 | |
| 1957 | routines.init = |
| 1958 | obj_symbol_final_value(f, obj_find_symbol(f, "init_module")); |
| 1959 | routines.cleanup = |
| 1960 | obj_symbol_final_value(f, obj_find_symbol(f, "cleanup_module")); |
| 1961 | |
| 1962 | /* Whew! All of the initialization is complete. Collect the final |
| 1963 | module image and give it to the kernel. */ |
| 1964 | |
| 1965 | image = xmalloc(m_size); |
| 1966 | obj_create_image(f, image); |
| 1967 | |
| 1968 | /* image holds the complete relocated module, accounting correctly for |
| 1969 | mod_use_count. However the old module kernel support assume that |
| 1970 | it is receiving something which does not contain mod_use_count. */ |
| 1971 | ret = old_sys_init_module(m_name, image + sizeof(long), |
| 1972 | m_size | (flag_autoclean ? OLD_MOD_AUTOCLEAN |
| 1973 | : 0), &routines, symtab); |
| 1974 | if (ret) |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 1975 | perror_msg("init_module: %s", m_name); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1976 | |
| 1977 | free(image); |
| 1978 | free(symtab); |
| 1979 | |
| 1980 | return ret == 0; |
| 1981 | } |
| 1982 | |
| 1983 | #else |
| 1984 | |
| 1985 | #define old_create_mod_use_count(x) TRUE |
| 1986 | #define old_init_module(x, y, z) TRUE |
| 1987 | |
Eric Andersen | f5d5e77 | 2001-01-24 23:34:48 +0000 | [diff] [blame] | 1988 | #endif /* BB_FEATURE_OLD_MODULE_INTERFACE */ |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1989 | |
| 1990 | |
| 1991 | |
| 1992 | /*======================================================================*/ |
| 1993 | /* Functions relating to module loading after 2.1.18. */ |
| 1994 | |
| 1995 | static int |
| 1996 | new_process_module_arguments(struct obj_file *f, int argc, char **argv) |
| 1997 | { |
| 1998 | while (argc > 0) { |
| 1999 | char *p, *q, *key; |
| 2000 | struct obj_symbol *sym; |
| 2001 | char *contents, *loc; |
| 2002 | int min, max, n; |
| 2003 | |
| 2004 | p = *argv; |
Eric Andersen | ef40aa8 | 2000-06-26 11:16:22 +0000 | [diff] [blame] | 2005 | if ((q = strchr(p, '=')) == NULL) { |
| 2006 | argc--; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2007 | continue; |
Eric Andersen | ef40aa8 | 2000-06-26 11:16:22 +0000 | [diff] [blame] | 2008 | } |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2009 | |
| 2010 | key = alloca(q - p + 6); |
| 2011 | memcpy(key, "parm_", 5); |
| 2012 | memcpy(key + 5, p, q - p); |
| 2013 | key[q - p + 5] = 0; |
| 2014 | |
| 2015 | p = get_modinfo_value(f, key); |
| 2016 | key += 5; |
| 2017 | if (p == NULL) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2018 | error_msg("invalid parameter %s", key); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2019 | return 0; |
| 2020 | } |
| 2021 | |
| 2022 | sym = obj_find_symbol(f, key); |
| 2023 | |
| 2024 | /* Also check that the parameter was not resolved from the kernel. */ |
| 2025 | if (sym == NULL || sym->secidx > SHN_HIRESERVE) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2026 | error_msg("symbol for parameter %s not found", key); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2027 | return 0; |
| 2028 | } |
| 2029 | |
| 2030 | if (isdigit(*p)) { |
| 2031 | min = strtoul(p, &p, 10); |
| 2032 | if (*p == '-') |
| 2033 | max = strtoul(p + 1, &p, 10); |
| 2034 | else |
| 2035 | max = min; |
| 2036 | } else |
| 2037 | min = max = 1; |
| 2038 | |
| 2039 | contents = f->sections[sym->secidx]->contents; |
| 2040 | loc = contents + sym->value; |
| 2041 | n = (*++q != '\0'); |
| 2042 | |
| 2043 | while (1) { |
| 2044 | if ((*p == 's') || (*p == 'c')) { |
| 2045 | char *str; |
| 2046 | |
| 2047 | /* Do C quoting if we begin with a ", else slurp the lot. */ |
| 2048 | if (*q == '"') { |
| 2049 | char *r; |
| 2050 | |
| 2051 | str = alloca(strlen(q)); |
| 2052 | for (r = str, q++; *q != '"'; ++q, ++r) { |
| 2053 | if (*q == '\0') { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2054 | error_msg("improperly terminated string argument for %s", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2055 | key); |
| 2056 | return 0; |
| 2057 | } else if (*q == '\\') |
| 2058 | switch (*++q) { |
| 2059 | case 'a': |
| 2060 | *r = '\a'; |
| 2061 | break; |
| 2062 | case 'b': |
| 2063 | *r = '\b'; |
| 2064 | break; |
| 2065 | case 'e': |
| 2066 | *r = '\033'; |
| 2067 | break; |
| 2068 | case 'f': |
| 2069 | *r = '\f'; |
| 2070 | break; |
| 2071 | case 'n': |
| 2072 | *r = '\n'; |
| 2073 | break; |
| 2074 | case 'r': |
| 2075 | *r = '\r'; |
| 2076 | break; |
| 2077 | case 't': |
| 2078 | *r = '\t'; |
| 2079 | break; |
| 2080 | |
| 2081 | case '0': |
| 2082 | case '1': |
| 2083 | case '2': |
| 2084 | case '3': |
| 2085 | case '4': |
| 2086 | case '5': |
| 2087 | case '6': |
| 2088 | case '7': |
| 2089 | { |
| 2090 | int c = *q - '0'; |
| 2091 | if (q[1] >= '0' && q[1] <= '7') { |
| 2092 | c = (c * 8) + *++q - '0'; |
| 2093 | if (q[1] >= '0' && q[1] <= '7') |
| 2094 | c = (c * 8) + *++q - '0'; |
| 2095 | } |
| 2096 | *r = c; |
| 2097 | } |
| 2098 | break; |
| 2099 | |
| 2100 | default: |
| 2101 | *r = *q; |
| 2102 | break; |
| 2103 | } else |
| 2104 | *r = *q; |
| 2105 | } |
| 2106 | *r = '\0'; |
| 2107 | ++q; |
| 2108 | } else { |
| 2109 | char *r; |
| 2110 | |
| 2111 | /* In this case, the string is not quoted. We will break |
| 2112 | it using the coma (like for ints). If the user wants to |
| 2113 | include comas in a string, he just has to quote it */ |
| 2114 | |
| 2115 | /* Search the next coma */ |
| 2116 | r = strchr(q, ','); |
| 2117 | |
| 2118 | /* Found ? */ |
| 2119 | if (r != (char *) NULL) { |
| 2120 | /* Recopy the current field */ |
| 2121 | str = alloca(r - q + 1); |
| 2122 | memcpy(str, q, r - q); |
| 2123 | |
| 2124 | /* I don't know if it is usefull, as the previous case |
| 2125 | doesn't null terminate the string ??? */ |
| 2126 | str[r - q] = '\0'; |
| 2127 | |
| 2128 | /* Keep next fields */ |
| 2129 | q = r; |
| 2130 | } else { |
| 2131 | /* last string */ |
| 2132 | str = q; |
| 2133 | q = ""; |
| 2134 | } |
| 2135 | } |
| 2136 | |
| 2137 | if (*p == 's') { |
| 2138 | /* Normal string */ |
| 2139 | obj_string_patch(f, sym->secidx, loc - contents, str); |
| 2140 | loc += tgt_sizeof_char_p; |
| 2141 | } else { |
| 2142 | /* Array of chars (in fact, matrix !) */ |
Pavel Roskin | ff5a903 | 2000-07-14 16:23:32 +0000 | [diff] [blame] | 2143 | unsigned long charssize; /* size of each member */ |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2144 | |
| 2145 | /* Get the size of each member */ |
| 2146 | /* Probably we should do that outside the loop ? */ |
| 2147 | if (!isdigit(*(p + 1))) { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 2148 | error_msg("parameter type 'c' for %s must be followed by" |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2149 | " the maximum size", key); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2150 | return 0; |
| 2151 | } |
| 2152 | charssize = strtoul(p + 1, (char **) NULL, 10); |
| 2153 | |
| 2154 | /* Check length */ |
| 2155 | if (strlen(str) >= charssize) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2156 | error_msg("string too long for %s (max %ld)", key, |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2157 | charssize - 1); |
| 2158 | return 0; |
| 2159 | } |
| 2160 | |
| 2161 | /* Copy to location */ |
| 2162 | strcpy((char *) loc, str); |
| 2163 | loc += charssize; |
| 2164 | } |
| 2165 | } else { |
| 2166 | long v = strtoul(q, &q, 0); |
| 2167 | switch (*p) { |
| 2168 | case 'b': |
| 2169 | *loc++ = v; |
| 2170 | break; |
| 2171 | case 'h': |
| 2172 | *(short *) loc = v; |
| 2173 | loc += tgt_sizeof_short; |
| 2174 | break; |
| 2175 | case 'i': |
| 2176 | *(int *) loc = v; |
| 2177 | loc += tgt_sizeof_int; |
| 2178 | break; |
| 2179 | case 'l': |
| 2180 | *(long *) loc = v; |
| 2181 | loc += tgt_sizeof_long; |
| 2182 | break; |
| 2183 | |
| 2184 | default: |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2185 | error_msg("unknown parameter type '%c' for %s", *p, key); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2186 | return 0; |
| 2187 | } |
| 2188 | } |
| 2189 | |
| 2190 | retry_end_of_value: |
| 2191 | switch (*q) { |
| 2192 | case '\0': |
| 2193 | goto end_of_arg; |
| 2194 | |
| 2195 | case ' ': |
| 2196 | case '\t': |
| 2197 | case '\n': |
| 2198 | case '\r': |
| 2199 | ++q; |
| 2200 | goto retry_end_of_value; |
| 2201 | |
| 2202 | case ',': |
| 2203 | if (++n > max) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2204 | error_msg("too many values for %s (max %d)", key, max); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2205 | return 0; |
| 2206 | } |
| 2207 | ++q; |
| 2208 | break; |
| 2209 | |
| 2210 | default: |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2211 | error_msg("invalid argument syntax for %s", key); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2212 | return 0; |
| 2213 | } |
| 2214 | } |
| 2215 | |
| 2216 | end_of_arg: |
| 2217 | if (n < min) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2218 | error_msg("too few values for %s (min %d)", key, min); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2219 | return 0; |
| 2220 | } |
| 2221 | |
| 2222 | argc--, argv++; |
| 2223 | } |
| 2224 | |
| 2225 | return 1; |
| 2226 | } |
| 2227 | |
| 2228 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 2229 | static int new_is_module_checksummed(struct obj_file *f) |
| 2230 | { |
| 2231 | const char *p = get_modinfo_value(f, "using_checksums"); |
| 2232 | if (p) |
| 2233 | return atoi(p); |
| 2234 | else |
| 2235 | return 0; |
| 2236 | } |
| 2237 | |
| 2238 | /* Get the module's kernel version in the canonical integer form. */ |
| 2239 | |
| 2240 | static int |
| 2241 | new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) |
| 2242 | { |
| 2243 | char *p, *q; |
| 2244 | int a, b, c; |
| 2245 | |
| 2246 | p = get_modinfo_value(f, "kernel_version"); |
| 2247 | if (p == NULL) |
| 2248 | return -1; |
| 2249 | strncpy(str, p, STRVERSIONLEN); |
| 2250 | |
| 2251 | a = strtoul(p, &p, 10); |
| 2252 | if (*p != '.') |
| 2253 | return -1; |
| 2254 | b = strtoul(p + 1, &p, 10); |
| 2255 | if (*p != '.') |
| 2256 | return -1; |
| 2257 | c = strtoul(p + 1, &q, 10); |
| 2258 | if (p + 1 == q) |
| 2259 | return -1; |
| 2260 | |
| 2261 | return a << 16 | b << 8 | c; |
| 2262 | } |
| 2263 | |
| 2264 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 2265 | |
| 2266 | |
Eric Andersen | f5d5e77 | 2001-01-24 23:34:48 +0000 | [diff] [blame] | 2267 | #ifdef BB_FEATURE_NEW_MODULE_INTERFACE |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2268 | |
| 2269 | /* Fetch the loaded modules, and all currently exported symbols. */ |
| 2270 | |
| 2271 | static int new_get_kernel_symbols(void) |
| 2272 | { |
| 2273 | char *module_names, *mn; |
| 2274 | struct external_module *modules, *m; |
| 2275 | struct new_module_symbol *syms, *s; |
| 2276 | size_t ret, bufsize, nmod, nsyms, i, j; |
| 2277 | |
| 2278 | /* Collect the loaded modules. */ |
| 2279 | |
| 2280 | module_names = xmalloc(bufsize = 256); |
| 2281 | retry_modules_load: |
| 2282 | if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) { |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 2283 | if (errno == ENOSPC && bufsize < ret) { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2284 | module_names = xrealloc(module_names, bufsize = ret); |
| 2285 | goto retry_modules_load; |
| 2286 | } |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 2287 | perror_msg("QM_MODULES"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2288 | return 0; |
| 2289 | } |
| 2290 | |
| 2291 | n_ext_modules = nmod = ret; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2292 | |
| 2293 | /* Collect the modules' symbols. */ |
| 2294 | |
Mark Whitley | 94fd480 | 2001-03-12 23:08:34 +0000 | [diff] [blame] | 2295 | if (nmod){ |
| 2296 | ext_modules = modules = xmalloc(nmod * sizeof(*modules)); |
| 2297 | memset(modules, 0, nmod * sizeof(*modules)); |
| 2298 | for (i = 0, mn = module_names, m = modules; |
| 2299 | i < nmod; ++i, ++m, mn += strlen(mn) + 1) { |
| 2300 | struct new_module_info info; |
| 2301 | |
| 2302 | if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) { |
| 2303 | if (errno == ENOENT) { |
| 2304 | /* The module was removed out from underneath us. */ |
| 2305 | continue; |
| 2306 | } |
| 2307 | perror_msg("query_module: QM_INFO: %s", mn); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2308 | return 0; |
| 2309 | } |
Mark Whitley | 94fd480 | 2001-03-12 23:08:34 +0000 | [diff] [blame] | 2310 | |
| 2311 | syms = xmalloc(bufsize = 1024); |
| 2312 | retry_mod_sym_load: |
| 2313 | if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) { |
| 2314 | switch (errno) { |
| 2315 | case ENOSPC: |
| 2316 | syms = xrealloc(syms, bufsize = ret); |
| 2317 | goto retry_mod_sym_load; |
| 2318 | case ENOENT: |
| 2319 | /* The module was removed out from underneath us. */ |
| 2320 | continue; |
| 2321 | default: |
| 2322 | perror_msg("query_module: QM_SYMBOLS: %s", mn); |
| 2323 | return 0; |
| 2324 | } |
| 2325 | } |
| 2326 | nsyms = ret; |
| 2327 | |
| 2328 | m->name = mn; |
| 2329 | m->addr = info.addr; |
| 2330 | m->nsyms = nsyms; |
| 2331 | m->syms = syms; |
| 2332 | |
| 2333 | for (j = 0, s = syms; j < nsyms; ++j, ++s) { |
| 2334 | s->name += (unsigned long) syms; |
| 2335 | } |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2336 | } |
| 2337 | } |
| 2338 | |
| 2339 | /* Collect the kernel's symbols. */ |
| 2340 | |
| 2341 | syms = xmalloc(bufsize = 16 * 1024); |
| 2342 | retry_kern_sym_load: |
| 2343 | if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) { |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 2344 | if (errno == ENOSPC && bufsize < ret) { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2345 | syms = xrealloc(syms, bufsize = ret); |
| 2346 | goto retry_kern_sym_load; |
| 2347 | } |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 2348 | perror_msg("kernel: QM_SYMBOLS"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2349 | return 0; |
| 2350 | } |
| 2351 | nksyms = nsyms = ret; |
| 2352 | ksyms = syms; |
| 2353 | |
| 2354 | for (j = 0, s = syms; j < nsyms; ++j, ++s) { |
| 2355 | s->name += (unsigned long) syms; |
| 2356 | } |
| 2357 | return 1; |
| 2358 | } |
| 2359 | |
| 2360 | |
| 2361 | /* Return the kernel symbol checksum version, or zero if not used. */ |
| 2362 | |
| 2363 | static int new_is_kernel_checksummed(void) |
| 2364 | { |
| 2365 | struct new_module_symbol *s; |
| 2366 | size_t i; |
| 2367 | |
| 2368 | /* Using_Versions is not the first symbol, but it should be in there. */ |
| 2369 | |
| 2370 | for (i = 0, s = ksyms; i < nksyms; ++i, ++s) |
| 2371 | if (strcmp((char *) s->name, "Using_Versions") == 0) |
| 2372 | return s->value; |
| 2373 | |
| 2374 | return 0; |
| 2375 | } |
| 2376 | |
| 2377 | |
| 2378 | static int new_create_this_module(struct obj_file *f, const char *m_name) |
| 2379 | { |
| 2380 | struct obj_section *sec; |
| 2381 | |
| 2382 | sec = obj_create_alloced_section_first(f, ".this", tgt_sizeof_long, |
| 2383 | sizeof(struct new_module)); |
| 2384 | memset(sec->contents, 0, sizeof(struct new_module)); |
| 2385 | |
| 2386 | obj_add_symbol(f, "__this_module", -1, |
| 2387 | ELFW(ST_INFO) (STB_LOCAL, STT_OBJECT), sec->idx, 0, |
| 2388 | sizeof(struct new_module)); |
| 2389 | |
| 2390 | obj_string_patch(f, sec->idx, offsetof(struct new_module, name), |
| 2391 | m_name); |
| 2392 | |
| 2393 | return 1; |
| 2394 | } |
| 2395 | |
| 2396 | |
| 2397 | static int new_create_module_ksymtab(struct obj_file *f) |
| 2398 | { |
| 2399 | struct obj_section *sec; |
| 2400 | int i; |
| 2401 | |
| 2402 | /* We must always add the module references. */ |
| 2403 | |
| 2404 | if (n_ext_modules_used) { |
| 2405 | struct new_module_ref *dep; |
| 2406 | struct obj_symbol *tm; |
| 2407 | |
| 2408 | sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p, |
| 2409 | (sizeof(struct new_module_ref) |
| 2410 | * n_ext_modules_used)); |
| 2411 | if (!sec) |
| 2412 | return 0; |
| 2413 | |
| 2414 | tm = obj_find_symbol(f, "__this_module"); |
| 2415 | dep = (struct new_module_ref *) sec->contents; |
| 2416 | for (i = 0; i < n_ext_modules; ++i) |
| 2417 | if (ext_modules[i].used) { |
| 2418 | dep->dep = ext_modules[i].addr; |
| 2419 | obj_symbol_patch(f, sec->idx, |
| 2420 | (char *) &dep->ref - sec->contents, tm); |
| 2421 | dep->next_ref = 0; |
| 2422 | ++dep; |
| 2423 | } |
| 2424 | } |
| 2425 | |
| 2426 | if (flag_export && !obj_find_section(f, "__ksymtab")) { |
| 2427 | size_t nsyms; |
| 2428 | int *loaded; |
| 2429 | |
| 2430 | sec = |
| 2431 | obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, |
| 2432 | 0); |
| 2433 | |
| 2434 | /* We don't want to export symbols residing in sections that |
| 2435 | aren't loaded. There are a number of these created so that |
| 2436 | we make sure certain module options don't appear twice. */ |
| 2437 | |
| 2438 | loaded = alloca(sizeof(int) * (i = f->header.e_shnum)); |
| 2439 | while (--i >= 0) |
| 2440 | loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0; |
| 2441 | |
| 2442 | for (nsyms = i = 0; i < HASH_BUCKETS; ++i) { |
| 2443 | struct obj_symbol *sym; |
| 2444 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 2445 | if (ELFW(ST_BIND) (sym->info) != STB_LOCAL |
| 2446 | && sym->secidx <= SHN_HIRESERVE |
| 2447 | && (sym->secidx >= SHN_LORESERVE |
| 2448 | || loaded[sym->secidx])) { |
| 2449 | ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p; |
| 2450 | |
| 2451 | obj_symbol_patch(f, sec->idx, ofs, sym); |
| 2452 | obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, |
| 2453 | sym->name); |
| 2454 | |
| 2455 | nsyms++; |
| 2456 | } |
| 2457 | } |
| 2458 | |
| 2459 | obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p); |
| 2460 | } |
| 2461 | |
| 2462 | return 1; |
| 2463 | } |
| 2464 | |
| 2465 | |
| 2466 | static int |
| 2467 | new_init_module(const char *m_name, struct obj_file *f, |
| 2468 | unsigned long m_size) |
| 2469 | { |
| 2470 | struct new_module *module; |
| 2471 | struct obj_section *sec; |
| 2472 | void *image; |
| 2473 | int ret; |
| 2474 | tgt_long m_addr; |
| 2475 | |
| 2476 | sec = obj_find_section(f, ".this"); |
| 2477 | module = (struct new_module *) sec->contents; |
| 2478 | m_addr = sec->header.sh_addr; |
| 2479 | |
| 2480 | module->size_of_struct = sizeof(*module); |
| 2481 | module->size = m_size; |
| 2482 | module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0; |
| 2483 | |
| 2484 | sec = obj_find_section(f, "__ksymtab"); |
| 2485 | if (sec && sec->header.sh_size) { |
| 2486 | module->syms = sec->header.sh_addr; |
| 2487 | module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p); |
| 2488 | } |
| 2489 | |
| 2490 | if (n_ext_modules_used) { |
| 2491 | sec = obj_find_section(f, ".kmodtab"); |
| 2492 | module->deps = sec->header.sh_addr; |
| 2493 | module->ndeps = n_ext_modules_used; |
| 2494 | } |
| 2495 | |
| 2496 | module->init = |
| 2497 | obj_symbol_final_value(f, obj_find_symbol(f, "init_module")); |
| 2498 | module->cleanup = |
| 2499 | obj_symbol_final_value(f, obj_find_symbol(f, "cleanup_module")); |
| 2500 | |
| 2501 | sec = obj_find_section(f, "__ex_table"); |
| 2502 | if (sec) { |
| 2503 | module->ex_table_start = sec->header.sh_addr; |
| 2504 | module->ex_table_end = sec->header.sh_addr + sec->header.sh_size; |
| 2505 | } |
| 2506 | |
| 2507 | sec = obj_find_section(f, ".text.init"); |
| 2508 | if (sec) { |
| 2509 | module->runsize = sec->header.sh_addr - m_addr; |
| 2510 | } |
| 2511 | sec = obj_find_section(f, ".data.init"); |
| 2512 | if (sec) { |
| 2513 | if (!module->runsize || |
| 2514 | module->runsize > sec->header.sh_addr - m_addr) |
| 2515 | module->runsize = sec->header.sh_addr - m_addr; |
| 2516 | } |
| 2517 | |
| 2518 | if (!arch_init_module(f, module)) |
| 2519 | return 0; |
| 2520 | |
| 2521 | /* Whew! All of the initialization is complete. Collect the final |
| 2522 | module image and give it to the kernel. */ |
| 2523 | |
| 2524 | image = xmalloc(m_size); |
| 2525 | obj_create_image(f, image); |
| 2526 | |
Eric Andersen | 64c8b17 | 2001-04-05 07:33:10 +0000 | [diff] [blame] | 2527 | ret = new_sys_init_module(m_name, (struct new_module *) image); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2528 | if (ret) |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 2529 | perror_msg("init_module: %s", m_name); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2530 | |
| 2531 | free(image); |
| 2532 | |
| 2533 | return ret == 0; |
| 2534 | } |
| 2535 | |
| 2536 | #else |
| 2537 | |
| 2538 | #define new_init_module(x, y, z) TRUE |
| 2539 | #define new_create_this_module(x, y) 0 |
| 2540 | #define new_create_module_ksymtab(x) |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 2541 | #define query_module(v, w, x, y, z) -1 |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2542 | |
Eric Andersen | f5d5e77 | 2001-01-24 23:34:48 +0000 | [diff] [blame] | 2543 | #endif /* BB_FEATURE_NEW_MODULE_INTERFACE */ |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2544 | |
| 2545 | |
| 2546 | /*======================================================================*/ |
| 2547 | |
| 2548 | int |
| 2549 | obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, |
| 2550 | const char *string) |
| 2551 | { |
| 2552 | struct obj_string_patch *p; |
| 2553 | struct obj_section *strsec; |
| 2554 | size_t len = strlen(string) + 1; |
| 2555 | char *loc; |
| 2556 | |
| 2557 | p = xmalloc(sizeof(*p)); |
| 2558 | p->next = f->string_patches; |
| 2559 | p->reloc_secidx = secidx; |
| 2560 | p->reloc_offset = offset; |
| 2561 | f->string_patches = p; |
| 2562 | |
| 2563 | strsec = obj_find_section(f, ".kstrtab"); |
| 2564 | if (strsec == NULL) { |
| 2565 | strsec = obj_create_alloced_section(f, ".kstrtab", 1, len); |
| 2566 | p->string_offset = 0; |
| 2567 | loc = strsec->contents; |
| 2568 | } else { |
| 2569 | p->string_offset = strsec->header.sh_size; |
| 2570 | loc = obj_extend_section(strsec, len); |
| 2571 | } |
| 2572 | memcpy(loc, string, len); |
| 2573 | |
| 2574 | return 1; |
| 2575 | } |
| 2576 | |
| 2577 | int |
| 2578 | obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, |
| 2579 | struct obj_symbol *sym) |
| 2580 | { |
| 2581 | struct obj_symbol_patch *p; |
| 2582 | |
| 2583 | p = xmalloc(sizeof(*p)); |
| 2584 | p->next = f->symbol_patches; |
| 2585 | p->reloc_secidx = secidx; |
| 2586 | p->reloc_offset = offset; |
| 2587 | p->sym = sym; |
| 2588 | f->symbol_patches = p; |
| 2589 | |
| 2590 | return 1; |
| 2591 | } |
| 2592 | |
| 2593 | int obj_check_undefineds(struct obj_file *f) |
| 2594 | { |
| 2595 | unsigned long i; |
| 2596 | int ret = 1; |
| 2597 | |
| 2598 | for (i = 0; i < HASH_BUCKETS; ++i) { |
| 2599 | struct obj_symbol *sym; |
| 2600 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 2601 | if (sym->secidx == SHN_UNDEF) { |
| 2602 | if (ELFW(ST_BIND) (sym->info) == STB_WEAK) { |
| 2603 | sym->secidx = SHN_ABS; |
| 2604 | sym->value = 0; |
| 2605 | } else { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2606 | error_msg("unresolved symbol %s", sym->name); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2607 | ret = 0; |
| 2608 | } |
| 2609 | } |
| 2610 | } |
| 2611 | |
| 2612 | return ret; |
| 2613 | } |
| 2614 | |
| 2615 | void obj_allocate_commons(struct obj_file *f) |
| 2616 | { |
| 2617 | struct common_entry { |
| 2618 | struct common_entry *next; |
| 2619 | struct obj_symbol *sym; |
| 2620 | } *common_head = NULL; |
| 2621 | |
| 2622 | unsigned long i; |
| 2623 | |
| 2624 | for (i = 0; i < HASH_BUCKETS; ++i) { |
| 2625 | struct obj_symbol *sym; |
| 2626 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 2627 | if (sym->secidx == SHN_COMMON) { |
| 2628 | /* Collect all COMMON symbols and sort them by size so as to |
| 2629 | minimize space wasted by alignment requirements. */ |
| 2630 | { |
| 2631 | struct common_entry **p, *n; |
| 2632 | for (p = &common_head; *p; p = &(*p)->next) |
| 2633 | if (sym->size <= (*p)->sym->size) |
| 2634 | break; |
| 2635 | |
| 2636 | n = alloca(sizeof(*n)); |
| 2637 | n->next = *p; |
| 2638 | n->sym = sym; |
| 2639 | *p = n; |
| 2640 | } |
| 2641 | } |
| 2642 | } |
| 2643 | |
| 2644 | for (i = 1; i < f->local_symtab_size; ++i) { |
| 2645 | struct obj_symbol *sym = f->local_symtab[i]; |
| 2646 | if (sym && sym->secidx == SHN_COMMON) { |
| 2647 | struct common_entry **p, *n; |
| 2648 | for (p = &common_head; *p; p = &(*p)->next) |
| 2649 | if (sym == (*p)->sym) |
| 2650 | break; |
| 2651 | else if (sym->size < (*p)->sym->size) { |
| 2652 | n = alloca(sizeof(*n)); |
| 2653 | n->next = *p; |
| 2654 | n->sym = sym; |
| 2655 | *p = n; |
| 2656 | break; |
| 2657 | } |
| 2658 | } |
| 2659 | } |
| 2660 | |
| 2661 | if (common_head) { |
| 2662 | /* Find the bss section. */ |
| 2663 | for (i = 0; i < f->header.e_shnum; ++i) |
| 2664 | if (f->sections[i]->header.sh_type == SHT_NOBITS) |
| 2665 | break; |
| 2666 | |
| 2667 | /* If for some reason there hadn't been one, create one. */ |
| 2668 | if (i == f->header.e_shnum) { |
| 2669 | struct obj_section *sec; |
| 2670 | |
| 2671 | f->sections = xrealloc(f->sections, (i + 1) * sizeof(sec)); |
| 2672 | f->sections[i] = sec = arch_new_section(); |
| 2673 | f->header.e_shnum = i + 1; |
| 2674 | |
| 2675 | memset(sec, 0, sizeof(*sec)); |
| 2676 | sec->header.sh_type = SHT_PROGBITS; |
| 2677 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; |
| 2678 | sec->name = ".bss"; |
| 2679 | sec->idx = i; |
| 2680 | } |
| 2681 | |
| 2682 | /* Allocate the COMMONS. */ |
| 2683 | { |
| 2684 | ElfW(Addr) bss_size = f->sections[i]->header.sh_size; |
| 2685 | ElfW(Addr) max_align = f->sections[i]->header.sh_addralign; |
| 2686 | struct common_entry *c; |
| 2687 | |
| 2688 | for (c = common_head; c; c = c->next) { |
| 2689 | ElfW(Addr) align = c->sym->value; |
| 2690 | |
| 2691 | if (align > max_align) |
| 2692 | max_align = align; |
| 2693 | if (bss_size & (align - 1)) |
| 2694 | bss_size = (bss_size | (align - 1)) + 1; |
| 2695 | |
| 2696 | c->sym->secidx = i; |
| 2697 | c->sym->value = bss_size; |
| 2698 | |
| 2699 | bss_size += c->sym->size; |
| 2700 | } |
| 2701 | |
| 2702 | f->sections[i]->header.sh_size = bss_size; |
| 2703 | f->sections[i]->header.sh_addralign = max_align; |
| 2704 | } |
| 2705 | } |
| 2706 | |
| 2707 | /* For the sake of patch relocation and parameter initialization, |
| 2708 | allocate zeroed data for NOBITS sections now. Note that after |
| 2709 | this we cannot assume NOBITS are really empty. */ |
| 2710 | for (i = 0; i < f->header.e_shnum; ++i) { |
| 2711 | struct obj_section *s = f->sections[i]; |
| 2712 | if (s->header.sh_type == SHT_NOBITS) { |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 2713 | if (s->header.sh_size != 0) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2714 | s->contents = memset(xmalloc(s->header.sh_size), |
| 2715 | 0, s->header.sh_size); |
Eric Andersen | 21adca7 | 2000-12-06 18:18:26 +0000 | [diff] [blame] | 2716 | else |
| 2717 | s->contents = NULL; |
| 2718 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2719 | s->header.sh_type = SHT_PROGBITS; |
| 2720 | } |
| 2721 | } |
| 2722 | } |
| 2723 | |
| 2724 | unsigned long obj_load_size(struct obj_file *f) |
| 2725 | { |
| 2726 | unsigned long dot = 0; |
| 2727 | struct obj_section *sec; |
| 2728 | |
| 2729 | /* Finalize the positions of the sections relative to one another. */ |
| 2730 | |
| 2731 | for (sec = f->load_order; sec; sec = sec->load_next) { |
| 2732 | ElfW(Addr) align; |
| 2733 | |
| 2734 | align = sec->header.sh_addralign; |
| 2735 | if (align && (dot & (align - 1))) |
| 2736 | dot = (dot | (align - 1)) + 1; |
| 2737 | |
| 2738 | sec->header.sh_addr = dot; |
| 2739 | dot += sec->header.sh_size; |
| 2740 | } |
| 2741 | |
| 2742 | return dot; |
| 2743 | } |
| 2744 | |
| 2745 | int obj_relocate(struct obj_file *f, ElfW(Addr) base) |
| 2746 | { |
| 2747 | int i, n = f->header.e_shnum; |
| 2748 | int ret = 1; |
| 2749 | |
| 2750 | /* Finalize the addresses of the sections. */ |
| 2751 | |
| 2752 | f->baseaddr = base; |
| 2753 | for (i = 0; i < n; ++i) |
| 2754 | f->sections[i]->header.sh_addr += base; |
| 2755 | |
| 2756 | /* And iterate over all of the relocations. */ |
| 2757 | |
| 2758 | for (i = 0; i < n; ++i) { |
| 2759 | struct obj_section *relsec, *symsec, *targsec, *strsec; |
| 2760 | ElfW(RelM) * rel, *relend; |
| 2761 | ElfW(Sym) * symtab; |
| 2762 | const char *strtab; |
| 2763 | |
| 2764 | relsec = f->sections[i]; |
| 2765 | if (relsec->header.sh_type != SHT_RELM) |
| 2766 | continue; |
| 2767 | |
| 2768 | symsec = f->sections[relsec->header.sh_link]; |
| 2769 | targsec = f->sections[relsec->header.sh_info]; |
| 2770 | strsec = f->sections[symsec->header.sh_link]; |
| 2771 | |
| 2772 | rel = (ElfW(RelM) *) relsec->contents; |
| 2773 | relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); |
| 2774 | symtab = (ElfW(Sym) *) symsec->contents; |
| 2775 | strtab = (const char *) strsec->contents; |
| 2776 | |
| 2777 | for (; rel < relend; ++rel) { |
| 2778 | ElfW(Addr) value = 0; |
| 2779 | struct obj_symbol *intsym = NULL; |
| 2780 | unsigned long symndx; |
| 2781 | ElfW(Sym) * extsym = 0; |
| 2782 | const char *errmsg; |
| 2783 | |
| 2784 | /* Attempt to find a value to use for this relocation. */ |
| 2785 | |
| 2786 | symndx = ELFW(R_SYM) (rel->r_info); |
| 2787 | if (symndx) { |
| 2788 | /* Note we've already checked for undefined symbols. */ |
| 2789 | |
| 2790 | extsym = &symtab[symndx]; |
| 2791 | if (ELFW(ST_BIND) (extsym->st_info) == STB_LOCAL) { |
| 2792 | /* Local symbols we look up in the local table to be sure |
| 2793 | we get the one that is really intended. */ |
| 2794 | intsym = f->local_symtab[symndx]; |
| 2795 | } else { |
| 2796 | /* Others we look up in the hash table. */ |
| 2797 | const char *name; |
| 2798 | if (extsym->st_name) |
| 2799 | name = strtab + extsym->st_name; |
| 2800 | else |
| 2801 | name = f->sections[extsym->st_shndx]->name; |
| 2802 | intsym = obj_find_symbol(f, name); |
| 2803 | } |
| 2804 | |
| 2805 | value = obj_symbol_final_value(f, intsym); |
| 2806 | intsym->referenced = 1; |
| 2807 | } |
| 2808 | #if SHT_RELM == SHT_RELA |
| 2809 | #if defined(__alpha__) && defined(AXP_BROKEN_GAS) |
| 2810 | /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */ |
| 2811 | if (!extsym || !extsym->st_name || |
| 2812 | ELFW(ST_BIND) (extsym->st_info) != STB_LOCAL) |
| 2813 | #endif |
| 2814 | value += rel->r_addend; |
| 2815 | #endif |
| 2816 | |
| 2817 | /* Do it! */ |
| 2818 | switch (arch_apply_relocation |
| 2819 | (f, targsec, symsec, intsym, rel, value)) { |
| 2820 | case obj_reloc_ok: |
| 2821 | break; |
| 2822 | |
| 2823 | case obj_reloc_overflow: |
| 2824 | errmsg = "Relocation overflow"; |
| 2825 | goto bad_reloc; |
| 2826 | case obj_reloc_dangerous: |
| 2827 | errmsg = "Dangerous relocation"; |
| 2828 | goto bad_reloc; |
| 2829 | case obj_reloc_unhandled: |
| 2830 | errmsg = "Unhandled relocation"; |
| 2831 | bad_reloc: |
| 2832 | if (extsym) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2833 | error_msg("%s of type %ld for %s", errmsg, |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2834 | (long) ELFW(R_TYPE) (rel->r_info), |
| 2835 | strtab + extsym->st_name); |
| 2836 | } else { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2837 | error_msg("%s of type %ld", errmsg, |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2838 | (long) ELFW(R_TYPE) (rel->r_info)); |
| 2839 | } |
| 2840 | ret = 0; |
| 2841 | break; |
| 2842 | } |
| 2843 | } |
| 2844 | } |
| 2845 | |
| 2846 | /* Finally, take care of the patches. */ |
| 2847 | |
| 2848 | if (f->string_patches) { |
| 2849 | struct obj_string_patch *p; |
| 2850 | struct obj_section *strsec; |
| 2851 | ElfW(Addr) strsec_base; |
| 2852 | strsec = obj_find_section(f, ".kstrtab"); |
| 2853 | strsec_base = strsec->header.sh_addr; |
| 2854 | |
| 2855 | for (p = f->string_patches; p; p = p->next) { |
| 2856 | struct obj_section *targsec = f->sections[p->reloc_secidx]; |
| 2857 | *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) |
| 2858 | = strsec_base + p->string_offset; |
| 2859 | } |
| 2860 | } |
| 2861 | |
| 2862 | if (f->symbol_patches) { |
| 2863 | struct obj_symbol_patch *p; |
| 2864 | |
| 2865 | for (p = f->symbol_patches; p; p = p->next) { |
| 2866 | struct obj_section *targsec = f->sections[p->reloc_secidx]; |
| 2867 | *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) |
| 2868 | = obj_symbol_final_value(f, p->sym); |
| 2869 | } |
| 2870 | } |
| 2871 | |
| 2872 | return ret; |
| 2873 | } |
| 2874 | |
| 2875 | int obj_create_image(struct obj_file *f, char *image) |
| 2876 | { |
| 2877 | struct obj_section *sec; |
| 2878 | ElfW(Addr) base = f->baseaddr; |
| 2879 | |
| 2880 | for (sec = f->load_order; sec; sec = sec->load_next) { |
| 2881 | char *secimg; |
| 2882 | |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 2883 | if (sec->contents == 0 || sec->header.sh_size == 0) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2884 | continue; |
| 2885 | |
| 2886 | secimg = image + (sec->header.sh_addr - base); |
| 2887 | |
| 2888 | /* Note that we allocated data for NOBITS sections earlier. */ |
| 2889 | memcpy(secimg, sec->contents, sec->header.sh_size); |
| 2890 | } |
| 2891 | |
| 2892 | return 1; |
| 2893 | } |
| 2894 | |
| 2895 | /*======================================================================*/ |
| 2896 | |
| 2897 | struct obj_file *obj_load(FILE * fp) |
| 2898 | { |
| 2899 | struct obj_file *f; |
| 2900 | ElfW(Shdr) * section_headers; |
| 2901 | int shnum, i; |
| 2902 | char *shstrtab; |
| 2903 | |
| 2904 | /* Read the file header. */ |
| 2905 | |
| 2906 | f = arch_new_file(); |
| 2907 | memset(f, 0, sizeof(*f)); |
| 2908 | f->symbol_cmp = strcmp; |
| 2909 | f->symbol_hash = obj_elf_hash; |
| 2910 | f->load_order_search_start = &f->load_order; |
| 2911 | |
| 2912 | fseek(fp, 0, SEEK_SET); |
| 2913 | if (fread(&f->header, sizeof(f->header), 1, fp) != 1) { |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 2914 | perror_msg("error reading ELF header"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2915 | return NULL; |
| 2916 | } |
| 2917 | |
| 2918 | if (f->header.e_ident[EI_MAG0] != ELFMAG0 |
| 2919 | || f->header.e_ident[EI_MAG1] != ELFMAG1 |
| 2920 | || f->header.e_ident[EI_MAG2] != ELFMAG2 |
| 2921 | || f->header.e_ident[EI_MAG3] != ELFMAG3) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2922 | error_msg("not an ELF file"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2923 | return NULL; |
| 2924 | } |
| 2925 | if (f->header.e_ident[EI_CLASS] != ELFCLASSM |
| 2926 | || f->header.e_ident[EI_DATA] != ELFDATAM |
| 2927 | || f->header.e_ident[EI_VERSION] != EV_CURRENT |
| 2928 | || !MATCH_MACHINE(f->header.e_machine)) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2929 | error_msg("ELF file not for this architecture"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2930 | return NULL; |
| 2931 | } |
| 2932 | if (f->header.e_type != ET_REL) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2933 | error_msg("ELF file not a relocatable object"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2934 | return NULL; |
| 2935 | } |
| 2936 | |
| 2937 | /* Read the section headers. */ |
| 2938 | |
| 2939 | if (f->header.e_shentsize != sizeof(ElfW(Shdr))) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2940 | error_msg("section header size mismatch: %lu != %lu", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2941 | (unsigned long) f->header.e_shentsize, |
| 2942 | (unsigned long) sizeof(ElfW(Shdr))); |
| 2943 | return NULL; |
| 2944 | } |
| 2945 | |
| 2946 | shnum = f->header.e_shnum; |
| 2947 | f->sections = xmalloc(sizeof(struct obj_section *) * shnum); |
| 2948 | memset(f->sections, 0, sizeof(struct obj_section *) * shnum); |
| 2949 | |
| 2950 | section_headers = alloca(sizeof(ElfW(Shdr)) * shnum); |
| 2951 | fseek(fp, f->header.e_shoff, SEEK_SET); |
| 2952 | if (fread(section_headers, sizeof(ElfW(Shdr)), shnum, fp) != shnum) { |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 2953 | perror_msg("error reading ELF section headers"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2954 | return NULL; |
| 2955 | } |
| 2956 | |
| 2957 | /* Read the section data. */ |
| 2958 | |
| 2959 | for (i = 0; i < shnum; ++i) { |
| 2960 | struct obj_section *sec; |
| 2961 | |
| 2962 | f->sections[i] = sec = arch_new_section(); |
| 2963 | memset(sec, 0, sizeof(*sec)); |
| 2964 | |
| 2965 | sec->header = section_headers[i]; |
| 2966 | sec->idx = i; |
| 2967 | |
Eric Andersen | 2bf658d | 2001-02-24 20:01:53 +0000 | [diff] [blame] | 2968 | if(sec->header.sh_size) switch (sec->header.sh_type) { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2969 | case SHT_NULL: |
| 2970 | case SHT_NOTE: |
| 2971 | case SHT_NOBITS: |
| 2972 | /* ignore */ |
| 2973 | break; |
| 2974 | |
| 2975 | case SHT_PROGBITS: |
| 2976 | case SHT_SYMTAB: |
| 2977 | case SHT_STRTAB: |
| 2978 | case SHT_RELM: |
| 2979 | if (sec->header.sh_size > 0) { |
| 2980 | sec->contents = xmalloc(sec->header.sh_size); |
| 2981 | fseek(fp, sec->header.sh_offset, SEEK_SET); |
| 2982 | if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) { |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 2983 | perror_msg("error reading ELF section data"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2984 | return NULL; |
| 2985 | } |
| 2986 | } else { |
| 2987 | sec->contents = NULL; |
| 2988 | } |
| 2989 | break; |
| 2990 | |
| 2991 | #if SHT_RELM == SHT_REL |
| 2992 | case SHT_RELA: |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2993 | error_msg("RELA relocations not supported on this architecture"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2994 | return NULL; |
| 2995 | #else |
| 2996 | case SHT_REL: |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 2997 | error_msg("REL relocations not supported on this architecture"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2998 | return NULL; |
| 2999 | #endif |
| 3000 | |
| 3001 | default: |
| 3002 | if (sec->header.sh_type >= SHT_LOPROC) { |
| 3003 | /* Assume processor specific section types are debug |
| 3004 | info and can safely be ignored. If this is ever not |
| 3005 | the case (Hello MIPS?), don't put ifdefs here but |
| 3006 | create an arch_load_proc_section(). */ |
| 3007 | break; |
| 3008 | } |
| 3009 | |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3010 | error_msg("can't handle sections of type %ld", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3011 | (long) sec->header.sh_type); |
| 3012 | return NULL; |
| 3013 | } |
| 3014 | } |
| 3015 | |
| 3016 | /* Do what sort of interpretation as needed by each section. */ |
| 3017 | |
| 3018 | shstrtab = f->sections[f->header.e_shstrndx]->contents; |
| 3019 | |
| 3020 | for (i = 0; i < shnum; ++i) { |
| 3021 | struct obj_section *sec = f->sections[i]; |
| 3022 | sec->name = shstrtab + sec->header.sh_name; |
| 3023 | } |
| 3024 | |
| 3025 | for (i = 0; i < shnum; ++i) { |
| 3026 | struct obj_section *sec = f->sections[i]; |
| 3027 | |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 3028 | /* .modinfo should be contents only but gcc has no attribute for that. |
| 3029 | * The kernel may have marked .modinfo as ALLOC, ignore this bit. |
| 3030 | */ |
| 3031 | if (strcmp(sec->name, ".modinfo") == 0) |
| 3032 | sec->header.sh_flags &= ~SHF_ALLOC; |
| 3033 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3034 | if (sec->header.sh_flags & SHF_ALLOC) |
| 3035 | obj_insert_section_load_order(f, sec); |
| 3036 | |
| 3037 | switch (sec->header.sh_type) { |
| 3038 | case SHT_SYMTAB: |
| 3039 | { |
| 3040 | unsigned long nsym, j; |
| 3041 | char *strtab; |
| 3042 | ElfW(Sym) * sym; |
| 3043 | |
| 3044 | if (sec->header.sh_entsize != sizeof(ElfW(Sym))) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3045 | error_msg("symbol size mismatch: %lu != %lu", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3046 | (unsigned long) sec->header.sh_entsize, |
| 3047 | (unsigned long) sizeof(ElfW(Sym))); |
| 3048 | return NULL; |
| 3049 | } |
| 3050 | |
| 3051 | nsym = sec->header.sh_size / sizeof(ElfW(Sym)); |
| 3052 | strtab = f->sections[sec->header.sh_link]->contents; |
| 3053 | sym = (ElfW(Sym) *) sec->contents; |
| 3054 | |
| 3055 | /* Allocate space for a table of local symbols. */ |
| 3056 | j = f->local_symtab_size = sec->header.sh_info; |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 3057 | f->local_symtab = xcalloc(j, sizeof(struct obj_symbol *)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3058 | |
| 3059 | /* Insert all symbols into the hash table. */ |
| 3060 | for (j = 1, ++sym; j < nsym; ++j, ++sym) { |
| 3061 | const char *name; |
| 3062 | if (sym->st_name) |
| 3063 | name = strtab + sym->st_name; |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 3064 | else |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3065 | name = f->sections[sym->st_shndx]->name; |
| 3066 | |
| 3067 | obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx, |
| 3068 | sym->st_value, sym->st_size); |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 3069 | } |
| 3070 | } |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3071 | break; |
| 3072 | |
| 3073 | case SHT_RELM: |
| 3074 | if (sec->header.sh_entsize != sizeof(ElfW(RelM))) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3075 | error_msg("relocation entry size mismatch: %lu != %lu", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3076 | (unsigned long) sec->header.sh_entsize, |
| 3077 | (unsigned long) sizeof(ElfW(RelM))); |
| 3078 | return NULL; |
| 3079 | } |
| 3080 | break; |
Eric Andersen | 4f4bcfc | 2001-04-25 17:22:32 +0000 | [diff] [blame] | 3081 | /* XXX Relocation code from modutils-2.3.19 is not here. |
| 3082 | * Why? That's about 20 lines of code from obj/obj_load.c, |
| 3083 | * which gets done in a second pass through the sections. |
| 3084 | * This BusyBox insmod does similar work in obj_relocate(). */ |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3085 | } |
| 3086 | } |
| 3087 | |
| 3088 | return f; |
| 3089 | } |
| 3090 | |
| 3091 | static void hide_special_symbols(struct obj_file *f) |
| 3092 | { |
| 3093 | static const char *const specials[] = { |
| 3094 | "cleanup_module", |
| 3095 | "init_module", |
| 3096 | "kernel_version", |
| 3097 | NULL |
| 3098 | }; |
| 3099 | |
| 3100 | struct obj_symbol *sym; |
| 3101 | const char *const *p; |
| 3102 | |
| 3103 | for (p = specials; *p; ++p) |
| 3104 | if ((sym = obj_find_symbol(f, *p)) != NULL) |
| 3105 | sym->info = |
| 3106 | ELFW(ST_INFO) (STB_LOCAL, ELFW(ST_TYPE) (sym->info)); |
| 3107 | } |
| 3108 | |
| 3109 | |
| 3110 | |
| 3111 | extern int insmod_main( int argc, char **argv) |
| 3112 | { |
Eric Andersen | a18aaf1 | 2001-01-24 19:07:09 +0000 | [diff] [blame] | 3113 | int opt; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3114 | int k_crcs; |
| 3115 | int k_new_syscalls; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3116 | int len; |
| 3117 | char *tmp; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3118 | unsigned long m_size; |
| 3119 | ElfW(Addr) m_addr; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3120 | FILE *fp; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3121 | struct obj_file *f; |
Eric Andersen | 02b9f42 | 2001-02-15 19:07:43 +0000 | [diff] [blame] | 3122 | struct stat st; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3123 | char m_name[BUFSIZ + 1] = "\0"; |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 3124 | int exit_status = EXIT_FAILURE; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3125 | int m_has_modinfo; |
| 3126 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 3127 | int k_version; |
| 3128 | char k_strversion[STRVERSIONLEN]; |
| 3129 | char m_strversion[STRVERSIONLEN]; |
| 3130 | int m_version; |
| 3131 | int m_crcs; |
| 3132 | #endif |
| 3133 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3134 | /* Parse any options */ |
Eric Andersen | 155c89b | 2001-01-25 04:11:06 +0000 | [diff] [blame] | 3135 | while ((opt = getopt(argc, argv, "fkvxLo:")) > 0) { |
Eric Andersen | a18aaf1 | 2001-01-24 19:07:09 +0000 | [diff] [blame] | 3136 | switch (opt) { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3137 | case 'f': /* force loading */ |
| 3138 | flag_force_load = 1; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3139 | break; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3140 | case 'k': /* module loaded by kerneld, auto-cleanable */ |
| 3141 | flag_autoclean = 1; |
| 3142 | break; |
| 3143 | case 'v': /* verbose output */ |
| 3144 | flag_verbose = 1; |
| 3145 | break; |
| 3146 | case 'x': /* do not export externs */ |
| 3147 | flag_export = 0; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3148 | break; |
Eric Andersen | 155c89b | 2001-01-25 04:11:06 +0000 | [diff] [blame] | 3149 | case 'o': /* name the output module */ |
| 3150 | strncpy(m_name, optarg, BUFSIZ); |
| 3151 | break; |
Eric Andersen | a18aaf1 | 2001-01-24 19:07:09 +0000 | [diff] [blame] | 3152 | case 'L': /* Stub warning */ |
| 3153 | /* This is needed for compatibility with modprobe. |
| 3154 | * In theory, this does locking, but we don't do |
| 3155 | * that. So be careful and plan your life around not |
| 3156 | * loading the same module 50 times concurrently. */ |
| 3157 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3158 | default: |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 3159 | show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3160 | } |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 3161 | } |
Eric Andersen | a18aaf1 | 2001-01-24 19:07:09 +0000 | [diff] [blame] | 3162 | |
| 3163 | if (argv[optind] == NULL) { |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 3164 | show_usage(); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3165 | } |
Eric Andersen | a18aaf1 | 2001-01-24 19:07:09 +0000 | [diff] [blame] | 3166 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3167 | /* Grab the module name */ |
Eric Andersen | a18aaf1 | 2001-01-24 19:07:09 +0000 | [diff] [blame] | 3168 | if ((tmp = strrchr(argv[optind], '/')) != NULL) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3169 | tmp++; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3170 | } else { |
Eric Andersen | a18aaf1 | 2001-01-24 19:07:09 +0000 | [diff] [blame] | 3171 | tmp = argv[optind]; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3172 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3173 | len = strlen(tmp); |
| 3174 | |
| 3175 | if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') |
| 3176 | len -= 2; |
Eric Andersen | f227815 | 2001-04-24 21:41:41 +0000 | [diff] [blame] | 3177 | memcpy(m_fullName, tmp, len); |
| 3178 | m_fullName[len]='\0'; |
Eric Andersen | 114ad9c | 2001-01-26 01:52:14 +0000 | [diff] [blame] | 3179 | if (*m_name == '\0') { |
| 3180 | strcpy(m_name, m_fullName); |
Eric Andersen | 155c89b | 2001-01-25 04:11:06 +0000 | [diff] [blame] | 3181 | } |
Eric Andersen | 114ad9c | 2001-01-26 01:52:14 +0000 | [diff] [blame] | 3182 | strcat(m_fullName, ".o"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3183 | |
| 3184 | /* Get a filedesc for the module */ |
Eric Andersen | 02b9f42 | 2001-02-15 19:07:43 +0000 | [diff] [blame] | 3185 | if (stat(argv[optind], &st) < 0 || !S_ISREG(st.st_mode) || |
| 3186 | (fp = fopen(argv[optind], "r")) == NULL) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3187 | /* Hmpf. Could not open it. Search through _PATH_MODULES to find a module named m_name */ |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 3188 | if (recursive_action(_PATH_MODULES, TRUE, FALSE, FALSE, |
Matt Kraai | 0f8f7b8 | 2000-08-01 18:16:56 +0000 | [diff] [blame] | 3189 | findNamedModule, 0, m_fullName) == FALSE) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3190 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3191 | if (m_filename[0] == '\0' |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3192 | || ((fp = fopen(m_filename, "r")) == NULL)) |
| 3193 | { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3194 | error_msg("No module named '%s' found in '%s'", m_fullName, _PATH_MODULES); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 3195 | return EXIT_FAILURE; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3196 | } |
Matt Kraai | 0f8f7b8 | 2000-08-01 18:16:56 +0000 | [diff] [blame] | 3197 | } else |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3198 | error_msg_and_die("No module named '%s' found in '%s'", m_fullName, _PATH_MODULES); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3199 | } else |
Eric Andersen | f227815 | 2001-04-24 21:41:41 +0000 | [diff] [blame] | 3200 | safe_strncpy(m_filename, argv[optind], sizeof(m_filename)); |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 3201 | |
| 3202 | |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 3203 | if ((f = obj_load(fp)) == NULL) |
| 3204 | perror_msg_and_die("Could not load the module"); |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 3205 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3206 | if (get_modinfo_value(f, "kernel_version") == NULL) |
| 3207 | m_has_modinfo = 0; |
| 3208 | else |
| 3209 | m_has_modinfo = 1; |
| 3210 | |
| 3211 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 3212 | /* Version correspondence? */ |
| 3213 | |
| 3214 | k_version = get_kernel_version(k_strversion); |
| 3215 | if (m_has_modinfo) { |
| 3216 | m_version = new_get_module_version(f, m_strversion); |
| 3217 | } else { |
| 3218 | m_version = old_get_module_version(f, m_strversion); |
| 3219 | if (m_version == -1) { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 3220 | error_msg("couldn't find the kernel version the module was " |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3221 | "compiled for"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3222 | goto out; |
| 3223 | } |
| 3224 | } |
| 3225 | |
| 3226 | if (strncmp(k_strversion, m_strversion, STRVERSIONLEN) != 0) { |
| 3227 | if (flag_force_load) { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 3228 | error_msg("Warning: kernel-module version mismatch\n" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3229 | "\t%s was compiled for kernel version %s\n" |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3230 | "\twhile this kernel is version %s", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3231 | m_filename, m_strversion, k_strversion); |
| 3232 | } else { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 3233 | error_msg("kernel-module version mismatch\n" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3234 | "\t%s was compiled for kernel version %s\n" |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3235 | "\twhile this kernel is version %s.", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3236 | m_filename, m_strversion, k_strversion); |
| 3237 | goto out; |
| 3238 | } |
| 3239 | } |
| 3240 | k_crcs = 0; |
| 3241 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 3242 | |
| 3243 | k_new_syscalls = !query_module(NULL, 0, NULL, 0, NULL); |
| 3244 | |
| 3245 | if (k_new_syscalls) { |
Eric Andersen | f5d5e77 | 2001-01-24 23:34:48 +0000 | [diff] [blame] | 3246 | #ifdef BB_FEATURE_NEW_MODULE_INTERFACE |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3247 | if (!new_get_kernel_symbols()) |
| 3248 | goto out; |
| 3249 | k_crcs = new_is_kernel_checksummed(); |
| 3250 | #else |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3251 | error_msg("Not configured to support new kernels"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3252 | goto out; |
| 3253 | #endif |
| 3254 | } else { |
Eric Andersen | f5d5e77 | 2001-01-24 23:34:48 +0000 | [diff] [blame] | 3255 | #ifdef BB_FEATURE_OLD_MODULE_INTERFACE |
Eric Andersen | 8c185f9 | 2000-09-22 00:38:07 +0000 | [diff] [blame] | 3256 | if (!old_get_kernel_symbols(m_name)) |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3257 | goto out; |
| 3258 | k_crcs = old_is_kernel_checksummed(); |
| 3259 | #else |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3260 | error_msg("Not configured to support old kernels"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3261 | goto out; |
| 3262 | #endif |
| 3263 | } |
| 3264 | |
| 3265 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 3266 | if (m_has_modinfo) |
| 3267 | m_crcs = new_is_module_checksummed(f); |
| 3268 | else |
| 3269 | m_crcs = old_is_module_checksummed(f); |
| 3270 | |
| 3271 | if (m_crcs != k_crcs) |
| 3272 | obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash); |
| 3273 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 3274 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3275 | /* Let the module know about the kernel symbols. */ |
| 3276 | add_kernel_symbols(f); |
| 3277 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3278 | /* Allocate common symbols, symbol tables, and string tables. */ |
| 3279 | |
| 3280 | if (k_new_syscalls |
| 3281 | ? !new_create_this_module(f, m_name) |
| 3282 | : !old_create_mod_use_count(f)) |
| 3283 | { |
| 3284 | goto out; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3285 | } |
| 3286 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3287 | if (!obj_check_undefineds(f)) { |
| 3288 | goto out; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3289 | } |
| 3290 | obj_allocate_commons(f); |
| 3291 | |
Eric Andersen | 86f3d5b | 2001-01-24 23:59:50 +0000 | [diff] [blame] | 3292 | /* done with the module name, on to the optional var=value arguments */ |
| 3293 | ++optind; |
| 3294 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3295 | if (optind < argc) { |
| 3296 | if (m_has_modinfo |
| 3297 | ? !new_process_module_arguments(f, argc - optind, argv + optind) |
| 3298 | : !old_process_module_arguments(f, argc - optind, argv + optind)) |
| 3299 | { |
| 3300 | goto out; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3301 | } |
| 3302 | } |
| 3303 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3304 | arch_create_got(f); |
| 3305 | hide_special_symbols(f); |
| 3306 | |
| 3307 | if (k_new_syscalls) |
| 3308 | new_create_module_ksymtab(f); |
| 3309 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3310 | /* Find current size of the module */ |
| 3311 | m_size = obj_load_size(f); |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 3312 | |
| 3313 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3314 | m_addr = create_module(m_name, m_size); |
Eric Andersen | 86f3d5b | 2001-01-24 23:59:50 +0000 | [diff] [blame] | 3315 | if (m_addr==-1) switch (errno) { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3316 | case EEXIST: |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3317 | error_msg("A module named %s already exists", m_name); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3318 | goto out; |
| 3319 | case ENOMEM: |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 3320 | error_msg("Can't allocate kernel memory for module; needed %lu bytes", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3321 | m_size); |
| 3322 | goto out; |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 3323 | default: |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 3324 | perror_msg("create_module: %s", m_name); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3325 | goto out; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3326 | } |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 3327 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3328 | if (!obj_relocate(f, m_addr)) { |
| 3329 | delete_module(m_name); |
| 3330 | goto out; |
| 3331 | } |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 3332 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3333 | if (k_new_syscalls |
| 3334 | ? !new_init_module(m_name, f, m_size) |
| 3335 | : !old_init_module(m_name, f, m_size)) |
| 3336 | { |
| 3337 | delete_module(m_name); |
| 3338 | goto out; |
| 3339 | } |
| 3340 | |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 3341 | exit_status = EXIT_SUCCESS; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 3342 | |
| 3343 | out: |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 3344 | fclose(fp); |
Eric Andersen | bb245ba | 2000-06-19 19:53:30 +0000 | [diff] [blame] | 3345 | return(exit_status); |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 3346 | } |