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 |
| 4 | * |
Erik Andersen | 61677fe | 2000-04-13 01:18:56 +0000 | [diff] [blame] | 5 | * Copyright (C) 1999,2000 by Lineo, inc. |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 6 | * Written by Erik Andersen <andersen@lineo.com> |
| 7 | * and Ron Alder <alder@lineo.com> |
| 8 | * |
| 9 | * Based almost entirely on the Linux modutils-2.3.11 implementation. |
| 10 | * Copyright 1996, 1997 Linux International. |
| 11 | * New implementation contributed by Richard Henderson <rth@tamu.edu> |
| 12 | * Based on original work by Bjorn Ekwall <bj0rn@blox.se> |
| 13 | * Restructured (and partly rewritten) by: |
| 14 | * Björn Ekwall <bj0rn@blox.se> February 1999 |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 15 | * |
| 16 | * This program is free software; you can redistribute it and/or modify |
| 17 | * it under the terms of the GNU General Public License as published by |
| 18 | * the Free Software Foundation; either version 2 of the License, or |
| 19 | * (at your option) any later version. |
| 20 | * |
| 21 | * This program is distributed in the hope that it will be useful, |
| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 24 | * General Public License for more details. |
| 25 | * |
| 26 | * You should have received a copy of the GNU General Public License |
| 27 | * along with this program; if not, write to the Free Software |
| 28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | #include "internal.h" |
| 33 | #include <stdlib.h> |
| 34 | #include <stdio.h> |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 35 | #include <stddef.h> |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 36 | #include <errno.h> |
| 37 | #include <unistd.h> |
| 38 | #include <dirent.h> |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 39 | #include <ctype.h> |
| 40 | #include <assert.h> |
Eric Andersen | 999bf72 | 2000-07-09 06:59:58 +0000 | [diff] [blame] | 41 | #include <getopt.h> |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 42 | #include <sys/utsname.h> |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 43 | |
| 44 | //---------------------------------------------------------------------------- |
| 45 | //--------modutils module.h, lines 45-242 |
| 46 | //---------------------------------------------------------------------------- |
| 47 | |
| 48 | /* Definitions for the Linux module syscall interface. |
| 49 | Copyright 1996, 1997 Linux International. |
| 50 | |
| 51 | Contributed by Richard Henderson <rth@tamu.edu> |
| 52 | |
| 53 | This file is part of the Linux modutils. |
| 54 | |
| 55 | This program is free software; you can redistribute it and/or modify it |
| 56 | under the terms of the GNU General Public License as published by the |
| 57 | Free Software Foundation; either version 2 of the License, or (at your |
| 58 | option) any later version. |
| 59 | |
| 60 | This program is distributed in the hope that it will be useful, but |
| 61 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 62 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 63 | General Public License for more details. |
| 64 | |
| 65 | You should have received a copy of the GNU General Public License |
| 66 | along with this program; if not, write to the Free Software Foundation, |
| 67 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 68 | |
| 69 | |
| 70 | #ifndef MODUTILS_MODULE_H |
| 71 | #define MODUTILS_MODULE_H 1 |
| 72 | |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 73 | #ident "$Id: insmod.c,v 1.16 2000/07/14 01:51:25 kraai Exp $" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 74 | |
| 75 | /* This file contains the structures used by the 2.0 and 2.1 kernels. |
| 76 | We do not use the kernel headers directly because we do not wish |
| 77 | to be dependant on a particular kernel version to compile insmod. */ |
| 78 | |
| 79 | |
| 80 | /*======================================================================*/ |
| 81 | /* The structures used by Linux 2.0. */ |
| 82 | |
| 83 | /* The symbol format used by get_kernel_syms(2). */ |
| 84 | struct old_kernel_sym |
| 85 | { |
| 86 | unsigned long value; |
| 87 | char name[60]; |
| 88 | }; |
| 89 | |
| 90 | struct old_module_ref |
| 91 | { |
| 92 | unsigned long module; /* kernel addresses */ |
| 93 | unsigned long next; |
| 94 | }; |
| 95 | |
| 96 | struct old_module_symbol |
| 97 | { |
| 98 | unsigned long addr; |
| 99 | unsigned long name; |
| 100 | }; |
| 101 | |
| 102 | struct old_symbol_table |
| 103 | { |
| 104 | int size; /* total, including string table!!! */ |
| 105 | int n_symbols; |
| 106 | int n_refs; |
| 107 | struct old_module_symbol symbol[0]; /* actual size defined by n_symbols */ |
| 108 | struct old_module_ref ref[0]; /* actual size defined by n_refs */ |
| 109 | }; |
| 110 | |
| 111 | struct old_mod_routines |
| 112 | { |
| 113 | unsigned long init; |
| 114 | unsigned long cleanup; |
| 115 | }; |
| 116 | |
| 117 | struct old_module |
| 118 | { |
| 119 | unsigned long next; |
| 120 | unsigned long ref; /* the list of modules that refer to me */ |
| 121 | unsigned long symtab; |
| 122 | unsigned long name; |
| 123 | int size; /* size of module in pages */ |
| 124 | unsigned long addr; /* address of module */ |
| 125 | int state; |
| 126 | unsigned long cleanup; /* cleanup routine */ |
| 127 | }; |
| 128 | |
| 129 | /* Sent to init_module(2) or'ed into the code size parameter. */ |
| 130 | #define OLD_MOD_AUTOCLEAN 0x40000000 /* big enough, but no sign problems... */ |
| 131 | |
| 132 | int get_kernel_syms(struct old_kernel_sym *); |
| 133 | int old_sys_init_module(const char *name, char *code, unsigned codesize, |
| 134 | struct old_mod_routines *, struct old_symbol_table *); |
| 135 | |
| 136 | /*======================================================================*/ |
| 137 | /* For sizeof() which are related to the module platform and not to the |
| 138 | environment isnmod is running in, use sizeof_xx instead of sizeof(xx). */ |
| 139 | |
| 140 | #define tgt_sizeof_char sizeof(char) |
| 141 | #define tgt_sizeof_short sizeof(short) |
| 142 | #define tgt_sizeof_int sizeof(int) |
| 143 | #define tgt_sizeof_long sizeof(long) |
| 144 | #define tgt_sizeof_char_p sizeof(char *) |
| 145 | #define tgt_sizeof_void_p sizeof(void *) |
| 146 | #define tgt_long long |
| 147 | |
| 148 | #if defined(__sparc__) && !defined(__sparc_v9__) && defined(ARCH_sparc64) |
| 149 | #undef tgt_sizeof_long |
| 150 | #undef tgt_sizeof_char_p |
| 151 | #undef tgt_sizeof_void_p |
| 152 | #undef tgt_long |
| 153 | #define tgt_sizeof_long 8 |
| 154 | #define tgt_sizeof_char_p 8 |
| 155 | #define tgt_sizeof_void_p 8 |
| 156 | #define tgt_long long long |
| 157 | #endif |
| 158 | |
| 159 | /*======================================================================*/ |
| 160 | /* The structures used in Linux 2.1. */ |
| 161 | |
| 162 | /* Note: new_module_symbol does not use tgt_long intentionally */ |
| 163 | struct new_module_symbol |
| 164 | { |
| 165 | unsigned long value; |
| 166 | unsigned long name; |
| 167 | }; |
| 168 | |
| 169 | struct new_module_persist; |
| 170 | |
| 171 | struct new_module_ref |
| 172 | { |
| 173 | unsigned tgt_long dep; /* kernel addresses */ |
| 174 | unsigned tgt_long ref; |
| 175 | unsigned tgt_long next_ref; |
| 176 | }; |
| 177 | |
| 178 | struct new_module |
| 179 | { |
| 180 | unsigned tgt_long size_of_struct; /* == sizeof(module) */ |
| 181 | unsigned tgt_long next; |
| 182 | unsigned tgt_long name; |
| 183 | unsigned tgt_long size; |
| 184 | |
| 185 | tgt_long usecount; |
| 186 | unsigned tgt_long flags; /* AUTOCLEAN et al */ |
| 187 | |
| 188 | unsigned nsyms; |
| 189 | unsigned ndeps; |
| 190 | |
| 191 | unsigned tgt_long syms; |
| 192 | unsigned tgt_long deps; |
| 193 | unsigned tgt_long refs; |
| 194 | unsigned tgt_long init; |
| 195 | unsigned tgt_long cleanup; |
| 196 | unsigned tgt_long ex_table_start; |
| 197 | unsigned tgt_long ex_table_end; |
| 198 | #ifdef __alpha__ |
| 199 | unsigned tgt_long gp; |
| 200 | #endif |
| 201 | /* Everything after here is extension. */ |
| 202 | unsigned tgt_long persist_start; |
| 203 | unsigned tgt_long persist_end; |
| 204 | unsigned tgt_long can_unload; |
| 205 | unsigned tgt_long runsize; |
| 206 | }; |
| 207 | |
| 208 | struct new_module_info |
| 209 | { |
| 210 | unsigned long addr; |
| 211 | unsigned long size; |
| 212 | unsigned long flags; |
| 213 | long usecount; |
| 214 | }; |
| 215 | |
| 216 | /* Bits of module.flags. */ |
| 217 | #define NEW_MOD_RUNNING 1 |
| 218 | #define NEW_MOD_DELETED 2 |
| 219 | #define NEW_MOD_AUTOCLEAN 4 |
| 220 | #define NEW_MOD_VISITED 8 |
| 221 | #define NEW_MOD_USED_ONCE 16 |
| 222 | |
| 223 | int new_sys_init_module(const char *name, const struct new_module *); |
| 224 | int query_module(const char *name, int which, void *buf, size_t bufsize, |
| 225 | size_t *ret); |
| 226 | |
| 227 | /* Values for query_module's which. */ |
| 228 | |
| 229 | #define QM_MODULES 1 |
| 230 | #define QM_DEPS 2 |
| 231 | #define QM_REFS 3 |
| 232 | #define QM_SYMBOLS 4 |
| 233 | #define QM_INFO 5 |
| 234 | |
| 235 | /*======================================================================*/ |
| 236 | /* The system calls unchanged between 2.0 and 2.1. */ |
| 237 | |
| 238 | unsigned long create_module(const char *, size_t); |
| 239 | int delete_module(const char *); |
| 240 | |
| 241 | |
| 242 | #endif /* module.h */ |
| 243 | |
| 244 | //---------------------------------------------------------------------------- |
| 245 | //--------end of modutils module.h |
| 246 | //---------------------------------------------------------------------------- |
| 247 | |
| 248 | |
| 249 | |
| 250 | //---------------------------------------------------------------------------- |
| 251 | //--------modutils obj.h, lines 253-462 |
| 252 | //---------------------------------------------------------------------------- |
| 253 | |
| 254 | /* Elf object file loading and relocation routines. |
| 255 | Copyright 1996, 1997 Linux International. |
| 256 | |
| 257 | Contributed by Richard Henderson <rth@tamu.edu> |
| 258 | |
| 259 | This file is part of the Linux modutils. |
| 260 | |
| 261 | This program is free software; you can redistribute it and/or modify it |
| 262 | under the terms of the GNU General Public License as published by the |
| 263 | Free Software Foundation; either version 2 of the License, or (at your |
| 264 | option) any later version. |
| 265 | |
| 266 | This program is distributed in the hope that it will be useful, but |
| 267 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 268 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 269 | General Public License for more details. |
| 270 | |
| 271 | You should have received a copy of the GNU General Public License |
| 272 | along with this program; if not, write to the Free Software Foundation, |
| 273 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 274 | |
| 275 | |
| 276 | #ifndef MODUTILS_OBJ_H |
| 277 | #define MODUTILS_OBJ_H 1 |
| 278 | |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 279 | #ident "$Id: insmod.c,v 1.16 2000/07/14 01:51:25 kraai Exp $" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 280 | |
| 281 | /* The relocatable object is manipulated using elfin types. */ |
| 282 | |
| 283 | #include <stdio.h> |
| 284 | #include <elf.h> |
| 285 | |
| 286 | |
| 287 | /* Machine-specific elf macros for i386 et al. */ |
| 288 | |
| 289 | #define ELFCLASSM ELFCLASS32 |
| 290 | #define ELFDATAM ELFDATA2LSB |
| 291 | |
| 292 | #define MATCH_MACHINE(x) (x == EM_386 || x == EM_486) |
| 293 | |
| 294 | #define SHT_RELM SHT_REL |
| 295 | #define Elf32_RelM Elf32_Rel |
| 296 | |
| 297 | |
| 298 | #ifndef ElfW |
| 299 | # if ELFCLASSM == ELFCLASS32 |
| 300 | # define ElfW(x) Elf32_ ## x |
| 301 | # define ELFW(x) ELF32_ ## x |
| 302 | # else |
| 303 | # define ElfW(x) Elf64_ ## x |
| 304 | # define ELFW(x) ELF64_ ## x |
| 305 | # endif |
| 306 | #endif |
| 307 | |
| 308 | /* For some reason this is missing from libc5. */ |
| 309 | #ifndef ELF32_ST_INFO |
| 310 | # define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) |
| 311 | #endif |
| 312 | |
| 313 | #ifndef ELF64_ST_INFO |
| 314 | # define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) |
| 315 | #endif |
| 316 | |
| 317 | struct obj_string_patch; |
| 318 | struct obj_symbol_patch; |
| 319 | |
| 320 | struct obj_section |
| 321 | { |
| 322 | ElfW(Shdr) header; |
| 323 | const char *name; |
| 324 | char *contents; |
| 325 | struct obj_section *load_next; |
| 326 | int idx; |
| 327 | }; |
| 328 | |
| 329 | struct obj_symbol |
| 330 | { |
| 331 | struct obj_symbol *next; /* hash table link */ |
| 332 | const char *name; |
| 333 | unsigned long value; |
| 334 | unsigned long size; |
| 335 | int secidx; /* the defining section index/module */ |
| 336 | int info; |
| 337 | int ksymidx; /* for export to the kernel symtab */ |
| 338 | int referenced; /* actually used in the link */ |
| 339 | }; |
| 340 | |
| 341 | /* Hardcode the hash table size. We shouldn't be needing so many |
| 342 | symbols that we begin to degrade performance, and we get a big win |
| 343 | by giving the compiler a constant divisor. */ |
| 344 | |
| 345 | #define HASH_BUCKETS 521 |
| 346 | |
| 347 | struct obj_file |
| 348 | { |
| 349 | ElfW(Ehdr) header; |
| 350 | ElfW(Addr) baseaddr; |
| 351 | struct obj_section **sections; |
| 352 | struct obj_section *load_order; |
| 353 | struct obj_section **load_order_search_start; |
| 354 | struct obj_string_patch *string_patches; |
| 355 | struct obj_symbol_patch *symbol_patches; |
| 356 | int (*symbol_cmp)(const char *, const char *); |
| 357 | unsigned long (*symbol_hash)(const char *); |
| 358 | unsigned long local_symtab_size; |
| 359 | struct obj_symbol **local_symtab; |
| 360 | struct obj_symbol *symtab[HASH_BUCKETS]; |
| 361 | }; |
| 362 | |
| 363 | enum obj_reloc |
| 364 | { |
| 365 | obj_reloc_ok, |
| 366 | obj_reloc_overflow, |
| 367 | obj_reloc_dangerous, |
| 368 | obj_reloc_unhandled |
| 369 | }; |
| 370 | |
| 371 | struct obj_string_patch |
| 372 | { |
| 373 | struct obj_string_patch *next; |
| 374 | int reloc_secidx; |
| 375 | ElfW(Addr) reloc_offset; |
| 376 | ElfW(Addr) string_offset; |
| 377 | }; |
| 378 | |
| 379 | struct obj_symbol_patch |
| 380 | { |
| 381 | struct obj_symbol_patch *next; |
| 382 | int reloc_secidx; |
| 383 | ElfW(Addr) reloc_offset; |
| 384 | struct obj_symbol *sym; |
| 385 | }; |
| 386 | |
| 387 | |
| 388 | /* Generic object manipulation routines. */ |
| 389 | |
| 390 | unsigned long obj_elf_hash(const char *); |
| 391 | |
| 392 | unsigned long obj_elf_hash_n(const char *, unsigned long len); |
| 393 | |
| 394 | struct obj_symbol *obj_add_symbol (struct obj_file *f, const char *name, |
| 395 | unsigned long symidx, int info, int secidx, |
| 396 | ElfW(Addr) value, unsigned long size); |
| 397 | |
| 398 | struct obj_symbol *obj_find_symbol (struct obj_file *f, |
| 399 | const char *name); |
| 400 | |
| 401 | ElfW(Addr) obj_symbol_final_value(struct obj_file *f, |
| 402 | struct obj_symbol *sym); |
| 403 | |
| 404 | void obj_set_symbol_compare(struct obj_file *f, |
| 405 | int (*cmp)(const char *, const char *), |
| 406 | unsigned long (*hash)(const char *)); |
| 407 | |
| 408 | struct obj_section *obj_find_section (struct obj_file *f, |
| 409 | const char *name); |
| 410 | |
| 411 | void obj_insert_section_load_order (struct obj_file *f, |
| 412 | struct obj_section *sec); |
| 413 | |
| 414 | struct obj_section *obj_create_alloced_section (struct obj_file *f, |
| 415 | const char *name, |
| 416 | unsigned long align, |
| 417 | unsigned long size); |
| 418 | |
| 419 | struct obj_section *obj_create_alloced_section_first (struct obj_file *f, |
| 420 | const char *name, |
| 421 | unsigned long align, |
| 422 | unsigned long size); |
| 423 | |
| 424 | void *obj_extend_section (struct obj_section *sec, unsigned long more); |
| 425 | |
| 426 | int obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, |
| 427 | const char *string); |
| 428 | |
| 429 | int obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, |
| 430 | struct obj_symbol *sym); |
| 431 | |
| 432 | int obj_check_undefineds(struct obj_file *f); |
| 433 | |
| 434 | void obj_allocate_commons(struct obj_file *f); |
| 435 | |
| 436 | unsigned long obj_load_size (struct obj_file *f); |
| 437 | |
| 438 | int obj_relocate (struct obj_file *f, ElfW(Addr) base); |
| 439 | |
| 440 | struct obj_file *obj_load(FILE *f); |
| 441 | |
| 442 | int obj_create_image (struct obj_file *f, char *image); |
| 443 | |
| 444 | /* Architecture specific manipulation routines. */ |
| 445 | |
| 446 | struct obj_file *arch_new_file (void); |
| 447 | |
| 448 | struct obj_section *arch_new_section (void); |
| 449 | |
| 450 | struct obj_symbol *arch_new_symbol (void); |
| 451 | |
| 452 | enum obj_reloc arch_apply_relocation (struct obj_file *f, |
| 453 | struct obj_section *targsec, |
| 454 | struct obj_section *symsec, |
| 455 | struct obj_symbol *sym, |
| 456 | ElfW(RelM) *rel, ElfW(Addr) value); |
| 457 | |
| 458 | int arch_create_got (struct obj_file *f); |
| 459 | |
| 460 | struct new_module; |
| 461 | int arch_init_module (struct obj_file *f, struct new_module *); |
| 462 | |
| 463 | #endif /* obj.h */ |
| 464 | //---------------------------------------------------------------------------- |
| 465 | //--------end of modutils obj.h |
| 466 | //---------------------------------------------------------------------------- |
| 467 | |
| 468 | |
| 469 | |
| 470 | |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 471 | |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 472 | #define _PATH_MODULES "/lib/modules" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 473 | #define STRVERSIONLEN 32 |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 474 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 475 | #if !defined(BB_FEATURE_INSMOD_NEW_KERNEL) && !defined(BB_FEATURE_INSMOD_OLD_KERNEL) |
| 476 | #error "Must have ether BB_FEATURE_INSMOD_NEW_KERNEL or BB_FEATURE_INSMOD_OLD_KERNEL defined" |
| 477 | #endif |
| 478 | |
| 479 | /*======================================================================*/ |
| 480 | |
| 481 | int flag_force_load = 0; |
| 482 | int flag_autoclean = 0; |
| 483 | int flag_verbose = 0; |
| 484 | int flag_export = 1; |
| 485 | |
| 486 | |
| 487 | /*======================================================================*/ |
| 488 | |
| 489 | struct i386_got_entry { |
| 490 | int offset; |
| 491 | unsigned offset_done:1; |
| 492 | unsigned reloc_done:1; |
| 493 | }; |
| 494 | |
| 495 | struct i386_file { |
| 496 | struct obj_file root; |
| 497 | struct obj_section *got; |
| 498 | }; |
| 499 | |
| 500 | struct i386_symbol { |
| 501 | struct obj_symbol root; |
| 502 | struct i386_got_entry gotent; |
| 503 | }; |
| 504 | |
| 505 | |
| 506 | |
| 507 | struct external_module { |
| 508 | const char *name; |
| 509 | ElfW(Addr) addr; |
| 510 | int used; |
| 511 | size_t nsyms; |
| 512 | struct new_module_symbol *syms; |
| 513 | }; |
| 514 | |
| 515 | struct new_module_symbol *ksyms; |
| 516 | size_t nksyms; |
| 517 | |
| 518 | struct external_module *ext_modules; |
| 519 | int n_ext_modules; |
| 520 | int n_ext_modules_used; |
| 521 | |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 522 | |
| 523 | |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 524 | /* Some firendly syscalls to cheer everyone's day... */ |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 525 | #define __NR_new_sys_init_module __NR_init_module |
| 526 | _syscall2(int, new_sys_init_module, const char *, name, |
| 527 | const struct new_module *, info) |
| 528 | #define __NR_old_sys_init_module __NR_init_module |
| 529 | _syscall5(int, old_sys_init_module, const char *, name, char *, code, |
| 530 | unsigned, codesize, struct old_mod_routines *, routines, |
| 531 | struct old_symbol_table *, symtab) |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 532 | #ifndef __NR_query_module |
| 533 | #define __NR_query_module 167 |
| 534 | #endif |
Eric Andersen | bb245ba | 2000-06-19 19:53:30 +0000 | [diff] [blame] | 535 | _syscall5(int, query_module, const char *, name, int, which, |
| 536 | void *, buf, size_t, bufsize, size_t*, ret); |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 537 | #ifndef BB_RMMOD |
| 538 | _syscall1(int, delete_module, const char *, name) |
| 539 | #else |
| 540 | extern int delete_module(const char *); |
| 541 | #endif |
| 542 | |
| 543 | #if defined(__i386__) || defined(__m68k__) || defined(__arm__) |
| 544 | /* Jump through hoops to fixup error return codes */ |
| 545 | #define __NR__create_module __NR_create_module |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 546 | static inline _syscall2(long, _create_module, const char *, name, size_t, |
| 547 | size) |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 548 | unsigned long create_module(const char *name, size_t size) |
| 549 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 550 | long ret = _create_module(name, size); |
| 551 | |
| 552 | if (ret == -1 && errno > 125) { |
| 553 | ret = -errno; |
| 554 | errno = 0; |
| 555 | } |
| 556 | return ret; |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 557 | } |
| 558 | #else |
| 559 | _syscall2(unsigned long, create_module, const char *, name, size_t, size) |
| 560 | #endif |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 561 | static char m_filename[BUFSIZ + 1] = "\0"; |
| 562 | static char m_fullName[BUFSIZ + 1] = "\0"; |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 563 | static const char insmod_usage[] = |
Erik Andersen | 7ab9c7e | 2000-05-12 19:41:47 +0000 | [diff] [blame] | 564 | "insmod [OPTION]... MODULE [symbol=value]...\n" |
| 565 | #ifndef BB_FEATURE_TRIVIAL_HELP |
| 566 | "\nLoads the specified kernel modules into the kernel.\n\n" |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 567 | "Options:\n" |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 568 | "\t-f\tForce module to load into the wrong kernel version.\n" |
Erik Andersen | 7ab9c7e | 2000-05-12 19:41:47 +0000 | [diff] [blame] | 569 | "\t-k\tMake module autoclean-able.\n" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 570 | "\t-v\tverbose output\n" "\t-x\tdo not export externs\n" |
Erik Andersen | 7ab9c7e | 2000-05-12 19:41:47 +0000 | [diff] [blame] | 571 | #endif |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 572 | ; |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 573 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 574 | /*======================================================================*/ |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 575 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 576 | void *xrealloc(void *old, size_t size) |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 577 | { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 578 | void *ptr = realloc(old, size); |
| 579 | if (!ptr) { |
| 580 | perror("Out of memory"); |
| 581 | exit(1); |
| 582 | } |
| 583 | return ptr; |
| 584 | } |
| 585 | |
| 586 | |
| 587 | static int findNamedModule(const char *fileName, struct stat *statbuf, |
| 588 | void *userDate) |
| 589 | { |
| 590 | char *fullName = (char *) userDate; |
| 591 | |
| 592 | |
| 593 | if (fullName[0] == '\0') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 594 | return (FALSE); |
| 595 | else { |
| 596 | char *tmp = strrchr(fileName, '/'); |
| 597 | |
| 598 | if (tmp == NULL) |
| 599 | tmp = (char *) fileName; |
| 600 | else |
| 601 | tmp++; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 602 | if (check_wildcard_match(tmp, fullName) == TRUE) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 603 | /* Stop searching if we find a match */ |
| 604 | memcpy(m_filename, fileName, strlen(fileName)); |
| 605 | return (FALSE); |
| 606 | } |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 607 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 608 | return (TRUE); |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 609 | } |
| 610 | |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 611 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 612 | /*======================================================================*/ |
| 613 | |
| 614 | struct obj_file *arch_new_file(void) |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 615 | { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 616 | struct i386_file *f; |
| 617 | f = xmalloc(sizeof(*f)); |
| 618 | f->got = NULL; |
| 619 | return &f->root; |
| 620 | } |
| 621 | |
| 622 | struct obj_section *arch_new_section(void) |
| 623 | { |
| 624 | return xmalloc(sizeof(struct obj_section)); |
| 625 | } |
| 626 | |
| 627 | struct obj_symbol *arch_new_symbol(void) |
| 628 | { |
| 629 | struct i386_symbol *sym; |
| 630 | sym = xmalloc(sizeof(*sym)); |
| 631 | memset(&sym->gotent, 0, sizeof(sym->gotent)); |
| 632 | return &sym->root; |
| 633 | } |
| 634 | enum obj_reloc |
| 635 | arch_apply_relocation(struct obj_file *f, |
| 636 | struct obj_section *targsec, |
| 637 | struct obj_section *symsec, |
| 638 | struct obj_symbol *sym, |
| 639 | Elf32_Rel * rel, Elf32_Addr v) |
| 640 | { |
| 641 | struct i386_file *ifile = (struct i386_file *) f; |
| 642 | struct i386_symbol *isym = (struct i386_symbol *) sym; |
| 643 | |
| 644 | Elf32_Addr *loc = (Elf32_Addr *) (targsec->contents + rel->r_offset); |
| 645 | Elf32_Addr dot = targsec->header.sh_addr + rel->r_offset; |
| 646 | Elf32_Addr got = ifile->got ? ifile->got->header.sh_addr : 0; |
| 647 | |
| 648 | enum obj_reloc ret = obj_reloc_ok; |
| 649 | |
| 650 | switch (ELF32_R_TYPE(rel->r_info)) { |
| 651 | case R_386_NONE: |
| 652 | break; |
| 653 | |
| 654 | case R_386_32: |
| 655 | *loc += v; |
| 656 | break; |
| 657 | |
| 658 | case R_386_PLT32: |
| 659 | case R_386_PC32: |
| 660 | *loc += v - dot; |
| 661 | break; |
| 662 | |
| 663 | case R_386_GLOB_DAT: |
| 664 | case R_386_JMP_SLOT: |
| 665 | *loc = v; |
| 666 | break; |
| 667 | |
| 668 | case R_386_RELATIVE: |
| 669 | *loc += f->baseaddr; |
| 670 | break; |
| 671 | |
| 672 | case R_386_GOTPC: |
| 673 | assert(got != 0); |
| 674 | *loc += got - dot; |
| 675 | break; |
| 676 | |
| 677 | case R_386_GOT32: |
| 678 | assert(isym != NULL); |
| 679 | if (!isym->gotent.reloc_done) { |
| 680 | isym->gotent.reloc_done = 1; |
| 681 | *(Elf32_Addr *) (ifile->got->contents + isym->gotent.offset) = |
| 682 | v; |
| 683 | } |
| 684 | *loc += isym->gotent.offset; |
| 685 | break; |
| 686 | |
| 687 | case R_386_GOTOFF: |
| 688 | assert(got != 0); |
| 689 | *loc += v - got; |
| 690 | break; |
| 691 | |
| 692 | default: |
| 693 | ret = obj_reloc_unhandled; |
| 694 | break; |
| 695 | } |
| 696 | |
| 697 | return ret; |
| 698 | } |
| 699 | |
| 700 | int arch_create_got(struct obj_file *f) |
| 701 | { |
| 702 | struct i386_file *ifile = (struct i386_file *) f; |
| 703 | int i, n, offset = 0, gotneeded = 0; |
| 704 | |
| 705 | n = ifile->root.header.e_shnum; |
| 706 | for (i = 0; i < n; ++i) { |
| 707 | struct obj_section *relsec, *symsec, *strsec; |
| 708 | Elf32_Rel *rel, *relend; |
| 709 | Elf32_Sym *symtab; |
| 710 | const char *strtab; |
| 711 | |
| 712 | relsec = ifile->root.sections[i]; |
| 713 | if (relsec->header.sh_type != SHT_REL) |
| 714 | continue; |
| 715 | |
| 716 | symsec = ifile->root.sections[relsec->header.sh_link]; |
| 717 | strsec = ifile->root.sections[symsec->header.sh_link]; |
| 718 | |
| 719 | rel = (Elf32_Rel *) relsec->contents; |
| 720 | relend = rel + (relsec->header.sh_size / sizeof(Elf32_Rel)); |
| 721 | symtab = (Elf32_Sym *) symsec->contents; |
| 722 | strtab = (const char *) strsec->contents; |
| 723 | |
| 724 | for (; rel < relend; ++rel) { |
| 725 | Elf32_Sym *extsym; |
| 726 | struct i386_symbol *intsym; |
| 727 | const char *name; |
| 728 | |
| 729 | switch (ELF32_R_TYPE(rel->r_info)) { |
| 730 | case R_386_GOTPC: |
| 731 | case R_386_GOTOFF: |
| 732 | gotneeded = 1; |
| 733 | default: |
| 734 | continue; |
| 735 | |
| 736 | case R_386_GOT32: |
| 737 | break; |
| 738 | } |
| 739 | |
| 740 | extsym = &symtab[ELF32_R_SYM(rel->r_info)]; |
| 741 | if (extsym->st_name) |
| 742 | name = strtab + extsym->st_name; |
| 743 | else |
| 744 | name = f->sections[extsym->st_shndx]->name; |
| 745 | intsym = |
| 746 | (struct i386_symbol *) obj_find_symbol(&ifile->root, name); |
| 747 | |
| 748 | if (!intsym->gotent.offset_done) { |
| 749 | intsym->gotent.offset_done = 1; |
| 750 | intsym->gotent.offset = offset; |
| 751 | offset += 4; |
| 752 | } |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | if (offset > 0 || gotneeded) |
| 757 | ifile->got = |
| 758 | obj_create_alloced_section(&ifile->root, ".got", 4, offset); |
| 759 | |
| 760 | return 1; |
| 761 | } |
| 762 | |
| 763 | int arch_init_module(struct obj_file *f, struct new_module *mod) |
| 764 | { |
| 765 | return 1; |
| 766 | } |
| 767 | |
| 768 | |
| 769 | /*======================================================================*/ |
| 770 | |
| 771 | /* Standard ELF hash function. */ |
| 772 | inline unsigned long obj_elf_hash_n(const char *name, unsigned long n) |
| 773 | { |
| 774 | unsigned long h = 0; |
| 775 | unsigned long g; |
| 776 | unsigned char ch; |
| 777 | |
| 778 | while (n > 0) { |
| 779 | ch = *name++; |
| 780 | h = (h << 4) + ch; |
| 781 | if ((g = (h & 0xf0000000)) != 0) { |
| 782 | h ^= g >> 24; |
| 783 | h &= ~g; |
| 784 | } |
| 785 | n--; |
| 786 | } |
| 787 | return h; |
| 788 | } |
| 789 | |
| 790 | unsigned long obj_elf_hash(const char *name) |
| 791 | { |
| 792 | return obj_elf_hash_n(name, strlen(name)); |
| 793 | } |
| 794 | |
| 795 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 796 | /* Get the kernel version in the canonical integer form. */ |
| 797 | |
| 798 | static int get_kernel_version(char str[STRVERSIONLEN]) |
| 799 | { |
| 800 | struct utsname uts_info; |
| 801 | char *p, *q; |
| 802 | int a, b, c; |
| 803 | |
| 804 | if (uname(&uts_info) < 0) |
| 805 | return -1; |
| 806 | strncpy(str, uts_info.release, STRVERSIONLEN); |
| 807 | p = uts_info.release; |
| 808 | |
| 809 | a = strtoul(p, &p, 10); |
| 810 | if (*p != '.') |
| 811 | return -1; |
| 812 | b = strtoul(p + 1, &p, 10); |
| 813 | if (*p != '.') |
| 814 | return -1; |
| 815 | c = strtoul(p + 1, &q, 10); |
| 816 | if (p + 1 == q) |
| 817 | return -1; |
| 818 | |
| 819 | return a << 16 | b << 8 | c; |
| 820 | } |
| 821 | |
| 822 | /* String comparison for non-co-versioned kernel and module. */ |
| 823 | |
| 824 | static int ncv_strcmp(const char *a, const char *b) |
| 825 | { |
| 826 | size_t alen = strlen(a), blen = strlen(b); |
| 827 | |
| 828 | if (blen == alen + 10 && b[alen] == '_' && b[alen + 1] == 'R') |
| 829 | return strncmp(a, b, alen); |
| 830 | else if (alen == blen + 10 && a[blen] == '_' && a[blen + 1] == 'R') |
| 831 | return strncmp(a, b, blen); |
| 832 | else |
| 833 | return strcmp(a, b); |
| 834 | } |
| 835 | |
| 836 | /* String hashing for non-co-versioned kernel and module. Here |
| 837 | we are simply forced to drop the crc from the hash. */ |
| 838 | |
| 839 | static unsigned long ncv_symbol_hash(const char *str) |
| 840 | { |
| 841 | size_t len = strlen(str); |
| 842 | if (len > 10 && str[len - 10] == '_' && str[len - 9] == 'R') |
| 843 | len -= 10; |
| 844 | return obj_elf_hash_n(str, len); |
| 845 | } |
| 846 | |
| 847 | void |
| 848 | obj_set_symbol_compare(struct obj_file *f, |
| 849 | int (*cmp) (const char *, const char *), |
| 850 | unsigned long (*hash) (const char *)) |
| 851 | { |
| 852 | if (cmp) |
| 853 | f->symbol_cmp = cmp; |
| 854 | if (hash) { |
| 855 | struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next; |
| 856 | int i; |
| 857 | |
| 858 | f->symbol_hash = hash; |
| 859 | |
| 860 | memcpy(tmptab, f->symtab, sizeof(tmptab)); |
| 861 | memset(f->symtab, 0, sizeof(f->symtab)); |
| 862 | |
| 863 | for (i = 0; i < HASH_BUCKETS; ++i) |
| 864 | for (sym = tmptab[i]; sym; sym = next) { |
| 865 | unsigned long h = hash(sym->name) % HASH_BUCKETS; |
| 866 | next = sym->next; |
| 867 | sym->next = f->symtab[h]; |
| 868 | f->symtab[h] = sym; |
| 869 | } |
| 870 | } |
| 871 | } |
| 872 | |
| 873 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 874 | |
| 875 | |
| 876 | struct obj_symbol *obj_add_symbol(struct obj_file *f, const char *name, |
| 877 | unsigned long symidx, int info, |
| 878 | int secidx, ElfW(Addr) value, |
| 879 | unsigned long size) |
| 880 | { |
| 881 | struct obj_symbol *sym; |
| 882 | unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; |
| 883 | int n_type = ELFW(ST_TYPE) (info); |
| 884 | int n_binding = ELFW(ST_BIND) (info); |
| 885 | |
| 886 | for (sym = f->symtab[hash]; sym; sym = sym->next) |
| 887 | if (f->symbol_cmp(sym->name, name) == 0) { |
| 888 | int o_secidx = sym->secidx; |
| 889 | int o_info = sym->info; |
| 890 | int o_type = ELFW(ST_TYPE) (o_info); |
| 891 | int o_binding = ELFW(ST_BIND) (o_info); |
| 892 | |
| 893 | /* A redefinition! Is it legal? */ |
| 894 | |
| 895 | if (secidx == SHN_UNDEF) |
| 896 | return sym; |
| 897 | else if (o_secidx == SHN_UNDEF) |
| 898 | goto found; |
| 899 | else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) { |
| 900 | /* Cope with local and global symbols of the same name |
| 901 | in the same object file, as might have been created |
| 902 | by ld -r. The only reason locals are now seen at this |
| 903 | level at all is so that we can do semi-sensible things |
| 904 | with parameters. */ |
| 905 | |
| 906 | struct obj_symbol *nsym, **p; |
| 907 | |
| 908 | nsym = arch_new_symbol(); |
| 909 | nsym->next = sym->next; |
| 910 | nsym->ksymidx = -1; |
| 911 | |
| 912 | /* Excise the old (local) symbol from the hash chain. */ |
| 913 | for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next) |
| 914 | continue; |
| 915 | *p = sym = nsym; |
| 916 | goto found; |
| 917 | } else if (n_binding == STB_LOCAL) { |
| 918 | /* Another symbol of the same name has already been defined. |
| 919 | Just add this to the local table. */ |
| 920 | sym = arch_new_symbol(); |
| 921 | sym->next = NULL; |
| 922 | sym->ksymidx = -1; |
| 923 | f->local_symtab[symidx] = sym; |
| 924 | goto found; |
| 925 | } else if (n_binding == STB_WEAK) |
| 926 | return sym; |
| 927 | else if (o_binding == STB_WEAK) |
| 928 | goto found; |
| 929 | /* Don't unify COMMON symbols with object types the programmer |
| 930 | doesn't expect. */ |
| 931 | else if (secidx == SHN_COMMON |
| 932 | && (o_type == STT_NOTYPE || o_type == STT_OBJECT)) |
| 933 | return sym; |
| 934 | else if (o_secidx == SHN_COMMON |
| 935 | && (n_type == STT_NOTYPE || n_type == STT_OBJECT)) |
| 936 | goto found; |
| 937 | else { |
| 938 | /* Don't report an error if the symbol is coming from |
| 939 | the kernel or some external module. */ |
| 940 | if (secidx <= SHN_HIRESERVE) |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 941 | errorMsg("%s multiply defined\n", name); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 942 | return sym; |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | /* Completely new symbol. */ |
| 947 | sym = arch_new_symbol(); |
| 948 | sym->next = f->symtab[hash]; |
| 949 | f->symtab[hash] = sym; |
| 950 | sym->ksymidx = -1; |
| 951 | |
| 952 | if (ELFW(ST_BIND) (info) == STB_LOCAL) |
| 953 | f->local_symtab[symidx] = sym; |
| 954 | |
| 955 | found: |
| 956 | sym->name = name; |
| 957 | sym->value = value; |
| 958 | sym->size = size; |
| 959 | sym->secidx = secidx; |
| 960 | sym->info = info; |
| 961 | |
| 962 | return sym; |
| 963 | } |
| 964 | |
| 965 | struct obj_symbol *obj_find_symbol(struct obj_file *f, const char *name) |
| 966 | { |
| 967 | struct obj_symbol *sym; |
| 968 | unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; |
| 969 | |
| 970 | for (sym = f->symtab[hash]; sym; sym = sym->next) |
| 971 | if (f->symbol_cmp(sym->name, name) == 0) |
| 972 | return sym; |
| 973 | |
| 974 | return NULL; |
| 975 | } |
| 976 | |
| 977 | ElfW(Addr) |
| 978 | obj_symbol_final_value(struct obj_file * f, struct obj_symbol * sym) |
| 979 | { |
| 980 | if (sym) { |
| 981 | if (sym->secidx >= SHN_LORESERVE) |
| 982 | return sym->value; |
| 983 | |
| 984 | return sym->value + f->sections[sym->secidx]->header.sh_addr; |
| 985 | } else { |
| 986 | /* As a special case, a NULL sym has value zero. */ |
| 987 | return 0; |
| 988 | } |
| 989 | } |
| 990 | |
| 991 | struct obj_section *obj_find_section(struct obj_file *f, const char *name) |
| 992 | { |
| 993 | int i, n = f->header.e_shnum; |
| 994 | |
| 995 | for (i = 0; i < n; ++i) |
| 996 | if (strcmp(f->sections[i]->name, name) == 0) |
| 997 | return f->sections[i]; |
| 998 | |
| 999 | return NULL; |
| 1000 | } |
| 1001 | |
| 1002 | static int obj_load_order_prio(struct obj_section *a) |
| 1003 | { |
| 1004 | unsigned long af, ac; |
| 1005 | |
| 1006 | af = a->header.sh_flags; |
| 1007 | |
| 1008 | ac = 0; |
| 1009 | if (a->name[0] != '.' || strlen(a->name) != 10 || |
| 1010 | strcmp(a->name + 5, ".init")) |
| 1011 | ac |= 32; |
| 1012 | if (af & SHF_ALLOC) |
| 1013 | ac |= 16; |
| 1014 | if (!(af & SHF_WRITE)) |
| 1015 | ac |= 8; |
| 1016 | if (af & SHF_EXECINSTR) |
| 1017 | ac |= 4; |
| 1018 | if (a->header.sh_type != SHT_NOBITS) |
| 1019 | ac |= 2; |
| 1020 | |
| 1021 | return ac; |
| 1022 | } |
| 1023 | |
| 1024 | void |
| 1025 | obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec) |
| 1026 | { |
| 1027 | struct obj_section **p; |
| 1028 | int prio = obj_load_order_prio(sec); |
| 1029 | for (p = f->load_order_search_start; *p; p = &(*p)->load_next) |
| 1030 | if (obj_load_order_prio(*p) < prio) |
| 1031 | break; |
| 1032 | sec->load_next = *p; |
| 1033 | *p = sec; |
| 1034 | } |
| 1035 | |
| 1036 | struct obj_section *obj_create_alloced_section(struct obj_file *f, |
| 1037 | const char *name, |
| 1038 | unsigned long align, |
| 1039 | unsigned long size) |
| 1040 | { |
| 1041 | int newidx = f->header.e_shnum++; |
| 1042 | struct obj_section *sec; |
| 1043 | |
| 1044 | f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec)); |
| 1045 | f->sections[newidx] = sec = arch_new_section(); |
| 1046 | |
| 1047 | memset(sec, 0, sizeof(*sec)); |
| 1048 | sec->header.sh_type = SHT_PROGBITS; |
| 1049 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; |
| 1050 | sec->header.sh_size = size; |
| 1051 | sec->header.sh_addralign = align; |
| 1052 | sec->name = name; |
| 1053 | sec->idx = newidx; |
| 1054 | if (size) |
| 1055 | sec->contents = xmalloc(size); |
| 1056 | |
| 1057 | obj_insert_section_load_order(f, sec); |
| 1058 | |
| 1059 | return sec; |
| 1060 | } |
| 1061 | |
| 1062 | struct obj_section *obj_create_alloced_section_first(struct obj_file *f, |
| 1063 | const char *name, |
| 1064 | unsigned long align, |
| 1065 | unsigned long size) |
| 1066 | { |
| 1067 | int newidx = f->header.e_shnum++; |
| 1068 | struct obj_section *sec; |
| 1069 | |
| 1070 | f->sections = xrealloc(f->sections, (newidx + 1) * sizeof(sec)); |
| 1071 | f->sections[newidx] = sec = arch_new_section(); |
| 1072 | |
| 1073 | memset(sec, 0, sizeof(*sec)); |
| 1074 | sec->header.sh_type = SHT_PROGBITS; |
| 1075 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; |
| 1076 | sec->header.sh_size = size; |
| 1077 | sec->header.sh_addralign = align; |
| 1078 | sec->name = name; |
| 1079 | sec->idx = newidx; |
| 1080 | if (size) |
| 1081 | sec->contents = xmalloc(size); |
| 1082 | |
| 1083 | sec->load_next = f->load_order; |
| 1084 | f->load_order = sec; |
| 1085 | if (f->load_order_search_start == &f->load_order) |
| 1086 | f->load_order_search_start = &sec->load_next; |
| 1087 | |
| 1088 | return sec; |
| 1089 | } |
| 1090 | |
| 1091 | void *obj_extend_section(struct obj_section *sec, unsigned long more) |
| 1092 | { |
| 1093 | unsigned long oldsize = sec->header.sh_size; |
| 1094 | sec->contents = xrealloc(sec->contents, sec->header.sh_size += more); |
| 1095 | return sec->contents + oldsize; |
| 1096 | } |
| 1097 | |
| 1098 | |
| 1099 | |
| 1100 | /* Conditionally add the symbols from the given symbol set to the |
| 1101 | new module. */ |
| 1102 | |
| 1103 | static int |
| 1104 | add_symbols_from( |
| 1105 | struct obj_file *f, |
| 1106 | int idx, struct new_module_symbol *syms, size_t nsyms) |
| 1107 | { |
| 1108 | struct new_module_symbol *s; |
| 1109 | size_t i; |
| 1110 | int used = 0; |
| 1111 | |
| 1112 | for (i = 0, s = syms; i < nsyms; ++i, ++s) { |
| 1113 | |
| 1114 | /* Only add symbols that are already marked external. If we |
| 1115 | override locals we may cause problems for argument initialization. |
| 1116 | We will also create a false dependency on the module. */ |
| 1117 | struct obj_symbol *sym; |
| 1118 | |
| 1119 | sym = obj_find_symbol(f, (char *) s->name); |
| 1120 | if (sym && !ELFW(ST_BIND) (sym->info) == STB_LOCAL) { |
| 1121 | sym = obj_add_symbol(f, (char *) s->name, -1, |
| 1122 | ELFW(ST_INFO) (STB_GLOBAL, STT_NOTYPE), |
| 1123 | idx, s->value, 0); |
| 1124 | /* Did our symbol just get installed? If so, mark the |
| 1125 | module as "used". */ |
| 1126 | if (sym->secidx == idx) |
| 1127 | used = 1; |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | return used; |
| 1132 | } |
| 1133 | |
| 1134 | static void add_kernel_symbols(struct obj_file *f) |
| 1135 | { |
| 1136 | struct external_module *m; |
| 1137 | size_t i, nused = 0; |
| 1138 | |
| 1139 | /* Add module symbols first. */ |
| 1140 | |
| 1141 | for (i = 0, m = ext_modules; i < n_ext_modules; ++i, ++m) |
| 1142 | if (m->nsyms |
| 1143 | && add_symbols_from(f, SHN_HIRESERVE + 2 + i, m->syms, |
| 1144 | m->nsyms)) m->used = 1, ++nused; |
| 1145 | |
| 1146 | n_ext_modules_used = nused; |
| 1147 | |
| 1148 | /* And finally the symbols from the kernel proper. */ |
| 1149 | |
| 1150 | if (nksyms) |
| 1151 | add_symbols_from(f, SHN_HIRESERVE + 1, ksyms, nksyms); |
| 1152 | } |
| 1153 | |
| 1154 | static char *get_modinfo_value(struct obj_file *f, const char *key) |
| 1155 | { |
| 1156 | struct obj_section *sec; |
| 1157 | char *p, *v, *n, *ep; |
| 1158 | size_t klen = strlen(key); |
| 1159 | |
| 1160 | sec = obj_find_section(f, ".modinfo"); |
| 1161 | if (sec == NULL) |
| 1162 | return NULL; |
| 1163 | p = sec->contents; |
| 1164 | ep = p + sec->header.sh_size; |
| 1165 | while (p < ep) { |
| 1166 | v = strchr(p, '='); |
| 1167 | n = strchr(p, '\0'); |
| 1168 | if (v) { |
| 1169 | if (v - p == klen && strncmp(p, key, klen) == 0) |
| 1170 | return v + 1; |
| 1171 | } else { |
| 1172 | if (n - p == klen && strcmp(p, key) == 0) |
| 1173 | return n; |
| 1174 | } |
| 1175 | p = n + 1; |
| 1176 | } |
| 1177 | |
| 1178 | return NULL; |
| 1179 | } |
| 1180 | |
| 1181 | |
| 1182 | /*======================================================================*/ |
| 1183 | /* Functions relating to module loading in pre 2.1 kernels. */ |
| 1184 | |
| 1185 | static int |
| 1186 | old_process_module_arguments(struct obj_file *f, int argc, char **argv) |
| 1187 | { |
| 1188 | while (argc > 0) { |
| 1189 | char *p, *q; |
| 1190 | struct obj_symbol *sym; |
| 1191 | int *loc; |
| 1192 | |
| 1193 | p = *argv; |
Eric Andersen | ef40aa8 | 2000-06-26 11:16:22 +0000 | [diff] [blame] | 1194 | if ((q = strchr(p, '=')) == NULL) { |
| 1195 | argc--; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1196 | continue; |
Eric Andersen | ef40aa8 | 2000-06-26 11:16:22 +0000 | [diff] [blame] | 1197 | } |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1198 | *q++ = '\0'; |
| 1199 | |
| 1200 | sym = obj_find_symbol(f, p); |
| 1201 | |
| 1202 | /* Also check that the parameter was not resolved from the kernel. */ |
| 1203 | if (sym == NULL || sym->secidx > SHN_HIRESERVE) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1204 | errorMsg("symbol for parameter %s not found\n", p); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1205 | return 0; |
| 1206 | } |
| 1207 | |
| 1208 | loc = (int *) (f->sections[sym->secidx]->contents + sym->value); |
| 1209 | |
| 1210 | /* Do C quoting if we begin with a ". */ |
| 1211 | if (*q == '"') { |
| 1212 | char *r, *str; |
| 1213 | |
| 1214 | str = alloca(strlen(q)); |
| 1215 | for (r = str, q++; *q != '"'; ++q, ++r) { |
| 1216 | if (*q == '\0') { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1217 | errorMsg("improperly terminated string argument for %s\n", p); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1218 | return 0; |
| 1219 | } else if (*q == '\\') |
| 1220 | switch (*++q) { |
| 1221 | case 'a': |
| 1222 | *r = '\a'; |
| 1223 | break; |
| 1224 | case 'b': |
| 1225 | *r = '\b'; |
| 1226 | break; |
| 1227 | case 'e': |
| 1228 | *r = '\033'; |
| 1229 | break; |
| 1230 | case 'f': |
| 1231 | *r = '\f'; |
| 1232 | break; |
| 1233 | case 'n': |
| 1234 | *r = '\n'; |
| 1235 | break; |
| 1236 | case 'r': |
| 1237 | *r = '\r'; |
| 1238 | break; |
| 1239 | case 't': |
| 1240 | *r = '\t'; |
| 1241 | break; |
| 1242 | |
| 1243 | case '0': |
| 1244 | case '1': |
| 1245 | case '2': |
| 1246 | case '3': |
| 1247 | case '4': |
| 1248 | case '5': |
| 1249 | case '6': |
| 1250 | case '7': |
| 1251 | { |
| 1252 | int c = *q - '0'; |
| 1253 | if (q[1] >= '0' && q[1] <= '7') { |
| 1254 | c = (c * 8) + *++q - '0'; |
| 1255 | if (q[1] >= '0' && q[1] <= '7') |
| 1256 | c = (c * 8) + *++q - '0'; |
| 1257 | } |
| 1258 | *r = c; |
| 1259 | } |
| 1260 | break; |
| 1261 | |
| 1262 | default: |
| 1263 | *r = *q; |
| 1264 | break; |
| 1265 | } else |
| 1266 | *r = *q; |
| 1267 | } |
| 1268 | *r = '\0'; |
| 1269 | obj_string_patch(f, sym->secidx, sym->value, str); |
| 1270 | } else if (*q >= '0' && *q <= '9') { |
| 1271 | do |
| 1272 | *loc++ = strtoul(q, &q, 0); |
| 1273 | while (*q++ == ','); |
| 1274 | } else { |
| 1275 | char *contents = f->sections[sym->secidx]->contents; |
| 1276 | char *loc = contents + sym->value; |
| 1277 | char *r; /* To search for commas */ |
| 1278 | |
| 1279 | /* Break the string with comas */ |
| 1280 | while ((r = strchr(q, ',')) != (char *) NULL) { |
| 1281 | *r++ = '\0'; |
| 1282 | obj_string_patch(f, sym->secidx, loc - contents, q); |
| 1283 | loc += sizeof(char *); |
| 1284 | q = r; |
| 1285 | } |
| 1286 | |
| 1287 | /* last part */ |
| 1288 | obj_string_patch(f, sym->secidx, loc - contents, q); |
| 1289 | } |
| 1290 | |
| 1291 | argc--, argv++; |
| 1292 | } |
| 1293 | |
| 1294 | return 1; |
| 1295 | } |
| 1296 | |
| 1297 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 1298 | static int old_is_module_checksummed(struct obj_file *f) |
| 1299 | { |
| 1300 | return obj_find_symbol(f, "Using_Versions") != NULL; |
| 1301 | } |
| 1302 | /* Get the module's kernel version in the canonical integer form. */ |
| 1303 | |
| 1304 | static int |
| 1305 | old_get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) |
| 1306 | { |
| 1307 | struct obj_symbol *sym; |
| 1308 | char *p, *q; |
| 1309 | int a, b, c; |
| 1310 | |
| 1311 | sym = obj_find_symbol(f, "kernel_version"); |
| 1312 | if (sym == NULL) |
| 1313 | return -1; |
| 1314 | |
| 1315 | p = f->sections[sym->secidx]->contents + sym->value; |
| 1316 | strncpy(str, p, STRVERSIONLEN); |
| 1317 | |
| 1318 | a = strtoul(p, &p, 10); |
| 1319 | if (*p != '.') |
| 1320 | return -1; |
| 1321 | b = strtoul(p + 1, &p, 10); |
| 1322 | if (*p != '.') |
| 1323 | return -1; |
| 1324 | c = strtoul(p + 1, &q, 10); |
| 1325 | if (p + 1 == q) |
| 1326 | return -1; |
| 1327 | |
| 1328 | return a << 16 | b << 8 | c; |
| 1329 | } |
| 1330 | |
| 1331 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 1332 | |
| 1333 | #ifdef BB_FEATURE_INSMOD_OLD_KERNEL |
| 1334 | |
| 1335 | /* Fetch all the symbols and divvy them up as appropriate for the modules. */ |
| 1336 | |
| 1337 | static int old_get_kernel_symbols(void) |
| 1338 | { |
| 1339 | struct old_kernel_sym *ks, *k; |
| 1340 | struct new_module_symbol *s; |
| 1341 | struct external_module *mod; |
| 1342 | int nks, nms, nmod, i; |
| 1343 | |
| 1344 | nks = get_kernel_syms(NULL); |
| 1345 | if (nks < 0) { |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 1346 | errorMsg("get_kernel_syms: %s: %s", m_name, strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1347 | return 0; |
| 1348 | } |
| 1349 | |
| 1350 | ks = k = xmalloc(nks * sizeof(*ks)); |
| 1351 | |
| 1352 | if (get_kernel_syms(ks) != nks) { |
| 1353 | perror("inconsistency with get_kernel_syms -- is someone else " |
| 1354 | "playing with modules?"); |
| 1355 | free(ks); |
| 1356 | return 0; |
| 1357 | } |
| 1358 | |
| 1359 | /* Collect the module information. */ |
| 1360 | |
| 1361 | mod = NULL; |
| 1362 | nmod = -1; |
| 1363 | |
| 1364 | while (k->name[0] == '#' && k->name[1]) { |
| 1365 | struct old_kernel_sym *k2; |
| 1366 | struct new_module_symbol *s; |
| 1367 | |
| 1368 | /* Find out how many symbols this module has. */ |
| 1369 | for (k2 = k + 1; k2->name[0] != '#'; ++k2) |
| 1370 | continue; |
| 1371 | nms = k2 - k - 1; |
| 1372 | |
| 1373 | mod = xrealloc(mod, (++nmod + 1) * sizeof(*mod)); |
| 1374 | mod[nmod].name = k->name + 1; |
| 1375 | mod[nmod].addr = k->value; |
| 1376 | mod[nmod].used = 0; |
| 1377 | mod[nmod].nsyms = nms; |
| 1378 | mod[nmod].syms = s = (nms ? xmalloc(nms * sizeof(*s)) : NULL); |
| 1379 | |
| 1380 | for (i = 0, ++k; i < nms; ++i, ++s, ++k) { |
| 1381 | s->name = (unsigned long) k->name; |
| 1382 | s->value = k->value; |
| 1383 | } |
| 1384 | |
| 1385 | k = k2; |
| 1386 | } |
| 1387 | |
| 1388 | ext_modules = mod; |
| 1389 | n_ext_modules = nmod + 1; |
| 1390 | |
| 1391 | /* Now collect the symbols for the kernel proper. */ |
| 1392 | |
| 1393 | if (k->name[0] == '#') |
| 1394 | ++k; |
| 1395 | |
| 1396 | nksyms = nms = nks - (k - ks); |
| 1397 | ksyms = s = (nms ? xmalloc(nms * sizeof(*s)) : NULL); |
| 1398 | |
| 1399 | for (i = 0; i < nms; ++i, ++s, ++k) { |
| 1400 | s->name = (unsigned long) k->name; |
| 1401 | s->value = k->value; |
| 1402 | } |
| 1403 | |
| 1404 | return 1; |
| 1405 | } |
| 1406 | |
| 1407 | /* Return the kernel symbol checksum version, or zero if not used. */ |
| 1408 | |
| 1409 | static int old_is_kernel_checksummed(void) |
| 1410 | { |
| 1411 | /* Using_Versions is the first symbol. */ |
| 1412 | if (nksyms > 0 |
| 1413 | && strcmp((char *) ksyms[0].name, |
| 1414 | "Using_Versions") == 0) return ksyms[0].value; |
| 1415 | else |
| 1416 | return 0; |
| 1417 | } |
| 1418 | |
| 1419 | |
| 1420 | static int old_create_mod_use_count(struct obj_file *f) |
| 1421 | { |
| 1422 | struct obj_section *sec; |
| 1423 | |
| 1424 | sec = obj_create_alloced_section_first(f, ".moduse", sizeof(long), |
| 1425 | sizeof(long)); |
| 1426 | |
| 1427 | obj_add_symbol(f, "mod_use_count_", -1, |
| 1428 | ELFW(ST_INFO) (STB_LOCAL, STT_OBJECT), sec->idx, 0, |
| 1429 | sizeof(long)); |
| 1430 | |
| 1431 | return 1; |
| 1432 | } |
| 1433 | |
| 1434 | static int |
| 1435 | old_init_module(const char *m_name, struct obj_file *f, |
| 1436 | unsigned long m_size) |
| 1437 | { |
| 1438 | char *image; |
| 1439 | struct old_mod_routines routines; |
| 1440 | struct old_symbol_table *symtab; |
| 1441 | int ret; |
| 1442 | |
| 1443 | /* Create the symbol table */ |
| 1444 | { |
| 1445 | int nsyms = 0, strsize = 0, total; |
| 1446 | |
| 1447 | /* Size things first... */ |
| 1448 | if (flag_export) { |
| 1449 | int i; |
| 1450 | for (i = 0; i < HASH_BUCKETS; ++i) { |
| 1451 | struct obj_symbol *sym; |
| 1452 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 1453 | if (ELFW(ST_BIND) (sym->info) != STB_LOCAL |
| 1454 | && sym->secidx <= SHN_HIRESERVE) |
| 1455 | { |
| 1456 | sym->ksymidx = nsyms++; |
| 1457 | strsize += strlen(sym->name) + 1; |
| 1458 | } |
| 1459 | } |
| 1460 | } |
| 1461 | |
| 1462 | total = (sizeof(struct old_symbol_table) |
| 1463 | + nsyms * sizeof(struct old_module_symbol) |
| 1464 | + n_ext_modules_used * sizeof(struct old_module_ref) |
| 1465 | + strsize); |
| 1466 | symtab = xmalloc(total); |
| 1467 | symtab->size = total; |
| 1468 | symtab->n_symbols = nsyms; |
| 1469 | symtab->n_refs = n_ext_modules_used; |
| 1470 | |
| 1471 | if (flag_export && nsyms) { |
| 1472 | struct old_module_symbol *ksym; |
| 1473 | char *str; |
| 1474 | int i; |
| 1475 | |
| 1476 | ksym = symtab->symbol; |
| 1477 | str = ((char *) ksym + nsyms * sizeof(struct old_module_symbol) |
| 1478 | + n_ext_modules_used * sizeof(struct old_module_ref)); |
| 1479 | |
| 1480 | for (i = 0; i < HASH_BUCKETS; ++i) { |
| 1481 | struct obj_symbol *sym; |
| 1482 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 1483 | if (sym->ksymidx >= 0) { |
| 1484 | ksym->addr = obj_symbol_final_value(f, sym); |
| 1485 | ksym->name = |
| 1486 | (unsigned long) str - (unsigned long) symtab; |
| 1487 | |
| 1488 | str = stpcpy(str, sym->name) + 1; |
| 1489 | ksym++; |
| 1490 | } |
| 1491 | } |
| 1492 | } |
| 1493 | |
| 1494 | if (n_ext_modules_used) { |
| 1495 | struct old_module_ref *ref; |
| 1496 | int i; |
| 1497 | |
| 1498 | ref = (struct old_module_ref *) |
| 1499 | ((char *) symtab->symbol + nsyms * sizeof(struct old_module_symbol)); |
| 1500 | |
| 1501 | for (i = 0; i < n_ext_modules; ++i) |
| 1502 | if (ext_modules[i].used) |
| 1503 | ref++->module = ext_modules[i].addr; |
| 1504 | } |
| 1505 | } |
| 1506 | |
| 1507 | /* Fill in routines. */ |
| 1508 | |
| 1509 | routines.init = |
| 1510 | obj_symbol_final_value(f, obj_find_symbol(f, "init_module")); |
| 1511 | routines.cleanup = |
| 1512 | obj_symbol_final_value(f, obj_find_symbol(f, "cleanup_module")); |
| 1513 | |
| 1514 | /* Whew! All of the initialization is complete. Collect the final |
| 1515 | module image and give it to the kernel. */ |
| 1516 | |
| 1517 | image = xmalloc(m_size); |
| 1518 | obj_create_image(f, image); |
| 1519 | |
| 1520 | /* image holds the complete relocated module, accounting correctly for |
| 1521 | mod_use_count. However the old module kernel support assume that |
| 1522 | it is receiving something which does not contain mod_use_count. */ |
| 1523 | ret = old_sys_init_module(m_name, image + sizeof(long), |
| 1524 | m_size | (flag_autoclean ? OLD_MOD_AUTOCLEAN |
| 1525 | : 0), &routines, symtab); |
| 1526 | if (ret) |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 1527 | errorMsg("init_module: %s: %s", m_name, strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1528 | |
| 1529 | free(image); |
| 1530 | free(symtab); |
| 1531 | |
| 1532 | return ret == 0; |
| 1533 | } |
| 1534 | |
| 1535 | #else |
| 1536 | |
| 1537 | #define old_create_mod_use_count(x) TRUE |
| 1538 | #define old_init_module(x, y, z) TRUE |
| 1539 | |
| 1540 | #endif /* BB_FEATURE_INSMOD_OLD_KERNEL */ |
| 1541 | |
| 1542 | |
| 1543 | |
| 1544 | /*======================================================================*/ |
| 1545 | /* Functions relating to module loading after 2.1.18. */ |
| 1546 | |
| 1547 | static int |
| 1548 | new_process_module_arguments(struct obj_file *f, int argc, char **argv) |
| 1549 | { |
| 1550 | while (argc > 0) { |
| 1551 | char *p, *q, *key; |
| 1552 | struct obj_symbol *sym; |
| 1553 | char *contents, *loc; |
| 1554 | int min, max, n; |
| 1555 | |
| 1556 | p = *argv; |
Eric Andersen | ef40aa8 | 2000-06-26 11:16:22 +0000 | [diff] [blame] | 1557 | if ((q = strchr(p, '=')) == NULL) { |
| 1558 | argc--; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1559 | continue; |
Eric Andersen | ef40aa8 | 2000-06-26 11:16:22 +0000 | [diff] [blame] | 1560 | } |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1561 | |
| 1562 | key = alloca(q - p + 6); |
| 1563 | memcpy(key, "parm_", 5); |
| 1564 | memcpy(key + 5, p, q - p); |
| 1565 | key[q - p + 5] = 0; |
| 1566 | |
| 1567 | p = get_modinfo_value(f, key); |
| 1568 | key += 5; |
| 1569 | if (p == NULL) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1570 | errorMsg("invalid parameter %s\n", key); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1571 | return 0; |
| 1572 | } |
| 1573 | |
| 1574 | sym = obj_find_symbol(f, key); |
| 1575 | |
| 1576 | /* Also check that the parameter was not resolved from the kernel. */ |
| 1577 | if (sym == NULL || sym->secidx > SHN_HIRESERVE) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1578 | errorMsg("symbol for parameter %s not found\n", key); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1579 | return 0; |
| 1580 | } |
| 1581 | |
| 1582 | if (isdigit(*p)) { |
| 1583 | min = strtoul(p, &p, 10); |
| 1584 | if (*p == '-') |
| 1585 | max = strtoul(p + 1, &p, 10); |
| 1586 | else |
| 1587 | max = min; |
| 1588 | } else |
| 1589 | min = max = 1; |
| 1590 | |
| 1591 | contents = f->sections[sym->secidx]->contents; |
| 1592 | loc = contents + sym->value; |
| 1593 | n = (*++q != '\0'); |
| 1594 | |
| 1595 | while (1) { |
| 1596 | if ((*p == 's') || (*p == 'c')) { |
| 1597 | char *str; |
| 1598 | |
| 1599 | /* Do C quoting if we begin with a ", else slurp the lot. */ |
| 1600 | if (*q == '"') { |
| 1601 | char *r; |
| 1602 | |
| 1603 | str = alloca(strlen(q)); |
| 1604 | for (r = str, q++; *q != '"'; ++q, ++r) { |
| 1605 | if (*q == '\0') { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1606 | errorMsg("improperly terminated string argument for %s\n", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1607 | key); |
| 1608 | return 0; |
| 1609 | } else if (*q == '\\') |
| 1610 | switch (*++q) { |
| 1611 | case 'a': |
| 1612 | *r = '\a'; |
| 1613 | break; |
| 1614 | case 'b': |
| 1615 | *r = '\b'; |
| 1616 | break; |
| 1617 | case 'e': |
| 1618 | *r = '\033'; |
| 1619 | break; |
| 1620 | case 'f': |
| 1621 | *r = '\f'; |
| 1622 | break; |
| 1623 | case 'n': |
| 1624 | *r = '\n'; |
| 1625 | break; |
| 1626 | case 'r': |
| 1627 | *r = '\r'; |
| 1628 | break; |
| 1629 | case 't': |
| 1630 | *r = '\t'; |
| 1631 | break; |
| 1632 | |
| 1633 | case '0': |
| 1634 | case '1': |
| 1635 | case '2': |
| 1636 | case '3': |
| 1637 | case '4': |
| 1638 | case '5': |
| 1639 | case '6': |
| 1640 | case '7': |
| 1641 | { |
| 1642 | int c = *q - '0'; |
| 1643 | if (q[1] >= '0' && q[1] <= '7') { |
| 1644 | c = (c * 8) + *++q - '0'; |
| 1645 | if (q[1] >= '0' && q[1] <= '7') |
| 1646 | c = (c * 8) + *++q - '0'; |
| 1647 | } |
| 1648 | *r = c; |
| 1649 | } |
| 1650 | break; |
| 1651 | |
| 1652 | default: |
| 1653 | *r = *q; |
| 1654 | break; |
| 1655 | } else |
| 1656 | *r = *q; |
| 1657 | } |
| 1658 | *r = '\0'; |
| 1659 | ++q; |
| 1660 | } else { |
| 1661 | char *r; |
| 1662 | |
| 1663 | /* In this case, the string is not quoted. We will break |
| 1664 | it using the coma (like for ints). If the user wants to |
| 1665 | include comas in a string, he just has to quote it */ |
| 1666 | |
| 1667 | /* Search the next coma */ |
| 1668 | r = strchr(q, ','); |
| 1669 | |
| 1670 | /* Found ? */ |
| 1671 | if (r != (char *) NULL) { |
| 1672 | /* Recopy the current field */ |
| 1673 | str = alloca(r - q + 1); |
| 1674 | memcpy(str, q, r - q); |
| 1675 | |
| 1676 | /* I don't know if it is usefull, as the previous case |
| 1677 | doesn't null terminate the string ??? */ |
| 1678 | str[r - q] = '\0'; |
| 1679 | |
| 1680 | /* Keep next fields */ |
| 1681 | q = r; |
| 1682 | } else { |
| 1683 | /* last string */ |
| 1684 | str = q; |
| 1685 | q = ""; |
| 1686 | } |
| 1687 | } |
| 1688 | |
| 1689 | if (*p == 's') { |
| 1690 | /* Normal string */ |
| 1691 | obj_string_patch(f, sym->secidx, loc - contents, str); |
| 1692 | loc += tgt_sizeof_char_p; |
| 1693 | } else { |
| 1694 | /* Array of chars (in fact, matrix !) */ |
| 1695 | long charssize; /* size of each member */ |
| 1696 | |
| 1697 | /* Get the size of each member */ |
| 1698 | /* Probably we should do that outside the loop ? */ |
| 1699 | if (!isdigit(*(p + 1))) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1700 | errorMsg("parameter type 'c' for %s must be followed by" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1701 | " the maximum size\n", key); |
| 1702 | return 0; |
| 1703 | } |
| 1704 | charssize = strtoul(p + 1, (char **) NULL, 10); |
| 1705 | |
| 1706 | /* Check length */ |
| 1707 | if (strlen(str) >= charssize) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1708 | errorMsg("string too long for %s (max %ld)\n", key, |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1709 | charssize - 1); |
| 1710 | return 0; |
| 1711 | } |
| 1712 | |
| 1713 | /* Copy to location */ |
| 1714 | strcpy((char *) loc, str); |
| 1715 | loc += charssize; |
| 1716 | } |
| 1717 | } else { |
| 1718 | long v = strtoul(q, &q, 0); |
| 1719 | switch (*p) { |
| 1720 | case 'b': |
| 1721 | *loc++ = v; |
| 1722 | break; |
| 1723 | case 'h': |
| 1724 | *(short *) loc = v; |
| 1725 | loc += tgt_sizeof_short; |
| 1726 | break; |
| 1727 | case 'i': |
| 1728 | *(int *) loc = v; |
| 1729 | loc += tgt_sizeof_int; |
| 1730 | break; |
| 1731 | case 'l': |
| 1732 | *(long *) loc = v; |
| 1733 | loc += tgt_sizeof_long; |
| 1734 | break; |
| 1735 | |
| 1736 | default: |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1737 | errorMsg("unknown parameter type '%c' for %s\n", *p, key); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1738 | return 0; |
| 1739 | } |
| 1740 | } |
| 1741 | |
| 1742 | retry_end_of_value: |
| 1743 | switch (*q) { |
| 1744 | case '\0': |
| 1745 | goto end_of_arg; |
| 1746 | |
| 1747 | case ' ': |
| 1748 | case '\t': |
| 1749 | case '\n': |
| 1750 | case '\r': |
| 1751 | ++q; |
| 1752 | goto retry_end_of_value; |
| 1753 | |
| 1754 | case ',': |
| 1755 | if (++n > max) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1756 | errorMsg("too many values for %s (max %d)\n", key, max); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1757 | return 0; |
| 1758 | } |
| 1759 | ++q; |
| 1760 | break; |
| 1761 | |
| 1762 | default: |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1763 | errorMsg("invalid argument syntax for %s\n", key); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1764 | return 0; |
| 1765 | } |
| 1766 | } |
| 1767 | |
| 1768 | end_of_arg: |
| 1769 | if (n < min) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 1770 | errorMsg("too few values for %s (min %d)\n", key, min); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1771 | return 0; |
| 1772 | } |
| 1773 | |
| 1774 | argc--, argv++; |
| 1775 | } |
| 1776 | |
| 1777 | return 1; |
| 1778 | } |
| 1779 | |
| 1780 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 1781 | static int new_is_module_checksummed(struct obj_file *f) |
| 1782 | { |
| 1783 | const char *p = get_modinfo_value(f, "using_checksums"); |
| 1784 | if (p) |
| 1785 | return atoi(p); |
| 1786 | else |
| 1787 | return 0; |
| 1788 | } |
| 1789 | |
| 1790 | /* Get the module's kernel version in the canonical integer form. */ |
| 1791 | |
| 1792 | static int |
| 1793 | new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN]) |
| 1794 | { |
| 1795 | char *p, *q; |
| 1796 | int a, b, c; |
| 1797 | |
| 1798 | p = get_modinfo_value(f, "kernel_version"); |
| 1799 | if (p == NULL) |
| 1800 | return -1; |
| 1801 | strncpy(str, p, STRVERSIONLEN); |
| 1802 | |
| 1803 | a = strtoul(p, &p, 10); |
| 1804 | if (*p != '.') |
| 1805 | return -1; |
| 1806 | b = strtoul(p + 1, &p, 10); |
| 1807 | if (*p != '.') |
| 1808 | return -1; |
| 1809 | c = strtoul(p + 1, &q, 10); |
| 1810 | if (p + 1 == q) |
| 1811 | return -1; |
| 1812 | |
| 1813 | return a << 16 | b << 8 | c; |
| 1814 | } |
| 1815 | |
| 1816 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 1817 | |
| 1818 | |
| 1819 | #ifdef BB_FEATURE_INSMOD_NEW_KERNEL |
| 1820 | |
| 1821 | /* Fetch the loaded modules, and all currently exported symbols. */ |
| 1822 | |
| 1823 | static int new_get_kernel_symbols(void) |
| 1824 | { |
| 1825 | char *module_names, *mn; |
| 1826 | struct external_module *modules, *m; |
| 1827 | struct new_module_symbol *syms, *s; |
| 1828 | size_t ret, bufsize, nmod, nsyms, i, j; |
| 1829 | |
| 1830 | /* Collect the loaded modules. */ |
| 1831 | |
| 1832 | module_names = xmalloc(bufsize = 256); |
| 1833 | retry_modules_load: |
| 1834 | if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) { |
| 1835 | if (errno == ENOSPC) { |
| 1836 | module_names = xrealloc(module_names, bufsize = ret); |
| 1837 | goto retry_modules_load; |
| 1838 | } |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 1839 | errorMsg("QM_MODULES: %s", strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1840 | return 0; |
| 1841 | } |
| 1842 | |
| 1843 | n_ext_modules = nmod = ret; |
| 1844 | ext_modules = modules = xmalloc(nmod * sizeof(*modules)); |
| 1845 | memset(modules, 0, nmod * sizeof(*modules)); |
| 1846 | |
| 1847 | /* Collect the modules' symbols. */ |
| 1848 | |
| 1849 | for (i = 0, mn = module_names, m = modules; |
| 1850 | i < nmod; ++i, ++m, mn += strlen(mn) + 1) { |
| 1851 | struct new_module_info info; |
| 1852 | |
| 1853 | if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) { |
| 1854 | if (errno == ENOENT) { |
| 1855 | /* The module was removed out from underneath us. */ |
| 1856 | continue; |
| 1857 | } |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 1858 | errorMsg("query_module: QM_INFO: %s: %s", mn, strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1859 | return 0; |
| 1860 | } |
| 1861 | |
| 1862 | syms = xmalloc(bufsize = 1024); |
| 1863 | retry_mod_sym_load: |
| 1864 | if (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) { |
| 1865 | switch (errno) { |
| 1866 | case ENOSPC: |
| 1867 | syms = xrealloc(syms, bufsize = ret); |
| 1868 | goto retry_mod_sym_load; |
| 1869 | case ENOENT: |
| 1870 | /* The module was removed out from underneath us. */ |
| 1871 | continue; |
| 1872 | default: |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 1873 | errorMsg("query_module: QM_SYMBOLS: %s: %s", mn, strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1874 | return 0; |
| 1875 | } |
| 1876 | } |
| 1877 | nsyms = ret; |
| 1878 | |
| 1879 | m->name = mn; |
| 1880 | m->addr = info.addr; |
| 1881 | m->nsyms = nsyms; |
| 1882 | m->syms = syms; |
| 1883 | |
| 1884 | for (j = 0, s = syms; j < nsyms; ++j, ++s) { |
| 1885 | s->name += (unsigned long) syms; |
| 1886 | } |
| 1887 | } |
| 1888 | |
| 1889 | /* Collect the kernel's symbols. */ |
| 1890 | |
| 1891 | syms = xmalloc(bufsize = 16 * 1024); |
| 1892 | retry_kern_sym_load: |
| 1893 | if (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) { |
| 1894 | if (errno == ENOSPC) { |
| 1895 | syms = xrealloc(syms, bufsize = ret); |
| 1896 | goto retry_kern_sym_load; |
| 1897 | } |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 1898 | errorMsg("kernel: QM_SYMBOLS: %s", strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 1899 | return 0; |
| 1900 | } |
| 1901 | nksyms = nsyms = ret; |
| 1902 | ksyms = syms; |
| 1903 | |
| 1904 | for (j = 0, s = syms; j < nsyms; ++j, ++s) { |
| 1905 | s->name += (unsigned long) syms; |
| 1906 | } |
| 1907 | return 1; |
| 1908 | } |
| 1909 | |
| 1910 | |
| 1911 | /* Return the kernel symbol checksum version, or zero if not used. */ |
| 1912 | |
| 1913 | static int new_is_kernel_checksummed(void) |
| 1914 | { |
| 1915 | struct new_module_symbol *s; |
| 1916 | size_t i; |
| 1917 | |
| 1918 | /* Using_Versions is not the first symbol, but it should be in there. */ |
| 1919 | |
| 1920 | for (i = 0, s = ksyms; i < nksyms; ++i, ++s) |
| 1921 | if (strcmp((char *) s->name, "Using_Versions") == 0) |
| 1922 | return s->value; |
| 1923 | |
| 1924 | return 0; |
| 1925 | } |
| 1926 | |
| 1927 | |
| 1928 | static int new_create_this_module(struct obj_file *f, const char *m_name) |
| 1929 | { |
| 1930 | struct obj_section *sec; |
| 1931 | |
| 1932 | sec = obj_create_alloced_section_first(f, ".this", tgt_sizeof_long, |
| 1933 | sizeof(struct new_module)); |
| 1934 | memset(sec->contents, 0, sizeof(struct new_module)); |
| 1935 | |
| 1936 | obj_add_symbol(f, "__this_module", -1, |
| 1937 | ELFW(ST_INFO) (STB_LOCAL, STT_OBJECT), sec->idx, 0, |
| 1938 | sizeof(struct new_module)); |
| 1939 | |
| 1940 | obj_string_patch(f, sec->idx, offsetof(struct new_module, name), |
| 1941 | m_name); |
| 1942 | |
| 1943 | return 1; |
| 1944 | } |
| 1945 | |
| 1946 | |
| 1947 | static int new_create_module_ksymtab(struct obj_file *f) |
| 1948 | { |
| 1949 | struct obj_section *sec; |
| 1950 | int i; |
| 1951 | |
| 1952 | /* We must always add the module references. */ |
| 1953 | |
| 1954 | if (n_ext_modules_used) { |
| 1955 | struct new_module_ref *dep; |
| 1956 | struct obj_symbol *tm; |
| 1957 | |
| 1958 | sec = obj_create_alloced_section(f, ".kmodtab", tgt_sizeof_void_p, |
| 1959 | (sizeof(struct new_module_ref) |
| 1960 | * n_ext_modules_used)); |
| 1961 | if (!sec) |
| 1962 | return 0; |
| 1963 | |
| 1964 | tm = obj_find_symbol(f, "__this_module"); |
| 1965 | dep = (struct new_module_ref *) sec->contents; |
| 1966 | for (i = 0; i < n_ext_modules; ++i) |
| 1967 | if (ext_modules[i].used) { |
| 1968 | dep->dep = ext_modules[i].addr; |
| 1969 | obj_symbol_patch(f, sec->idx, |
| 1970 | (char *) &dep->ref - sec->contents, tm); |
| 1971 | dep->next_ref = 0; |
| 1972 | ++dep; |
| 1973 | } |
| 1974 | } |
| 1975 | |
| 1976 | if (flag_export && !obj_find_section(f, "__ksymtab")) { |
| 1977 | size_t nsyms; |
| 1978 | int *loaded; |
| 1979 | |
| 1980 | sec = |
| 1981 | obj_create_alloced_section(f, "__ksymtab", tgt_sizeof_void_p, |
| 1982 | 0); |
| 1983 | |
| 1984 | /* We don't want to export symbols residing in sections that |
| 1985 | aren't loaded. There are a number of these created so that |
| 1986 | we make sure certain module options don't appear twice. */ |
| 1987 | |
| 1988 | loaded = alloca(sizeof(int) * (i = f->header.e_shnum)); |
| 1989 | while (--i >= 0) |
| 1990 | loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0; |
| 1991 | |
| 1992 | for (nsyms = i = 0; i < HASH_BUCKETS; ++i) { |
| 1993 | struct obj_symbol *sym; |
| 1994 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 1995 | if (ELFW(ST_BIND) (sym->info) != STB_LOCAL |
| 1996 | && sym->secidx <= SHN_HIRESERVE |
| 1997 | && (sym->secidx >= SHN_LORESERVE |
| 1998 | || loaded[sym->secidx])) { |
| 1999 | ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p; |
| 2000 | |
| 2001 | obj_symbol_patch(f, sec->idx, ofs, sym); |
| 2002 | obj_string_patch(f, sec->idx, ofs + tgt_sizeof_void_p, |
| 2003 | sym->name); |
| 2004 | |
| 2005 | nsyms++; |
| 2006 | } |
| 2007 | } |
| 2008 | |
| 2009 | obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p); |
| 2010 | } |
| 2011 | |
| 2012 | return 1; |
| 2013 | } |
| 2014 | |
| 2015 | |
| 2016 | static int |
| 2017 | new_init_module(const char *m_name, struct obj_file *f, |
| 2018 | unsigned long m_size) |
| 2019 | { |
| 2020 | struct new_module *module; |
| 2021 | struct obj_section *sec; |
| 2022 | void *image; |
| 2023 | int ret; |
| 2024 | tgt_long m_addr; |
| 2025 | |
| 2026 | sec = obj_find_section(f, ".this"); |
| 2027 | module = (struct new_module *) sec->contents; |
| 2028 | m_addr = sec->header.sh_addr; |
| 2029 | |
| 2030 | module->size_of_struct = sizeof(*module); |
| 2031 | module->size = m_size; |
| 2032 | module->flags = flag_autoclean ? NEW_MOD_AUTOCLEAN : 0; |
| 2033 | |
| 2034 | sec = obj_find_section(f, "__ksymtab"); |
| 2035 | if (sec && sec->header.sh_size) { |
| 2036 | module->syms = sec->header.sh_addr; |
| 2037 | module->nsyms = sec->header.sh_size / (2 * tgt_sizeof_char_p); |
| 2038 | } |
| 2039 | |
| 2040 | if (n_ext_modules_used) { |
| 2041 | sec = obj_find_section(f, ".kmodtab"); |
| 2042 | module->deps = sec->header.sh_addr; |
| 2043 | module->ndeps = n_ext_modules_used; |
| 2044 | } |
| 2045 | |
| 2046 | module->init = |
| 2047 | obj_symbol_final_value(f, obj_find_symbol(f, "init_module")); |
| 2048 | module->cleanup = |
| 2049 | obj_symbol_final_value(f, obj_find_symbol(f, "cleanup_module")); |
| 2050 | |
| 2051 | sec = obj_find_section(f, "__ex_table"); |
| 2052 | if (sec) { |
| 2053 | module->ex_table_start = sec->header.sh_addr; |
| 2054 | module->ex_table_end = sec->header.sh_addr + sec->header.sh_size; |
| 2055 | } |
| 2056 | |
| 2057 | sec = obj_find_section(f, ".text.init"); |
| 2058 | if (sec) { |
| 2059 | module->runsize = sec->header.sh_addr - m_addr; |
| 2060 | } |
| 2061 | sec = obj_find_section(f, ".data.init"); |
| 2062 | if (sec) { |
| 2063 | if (!module->runsize || |
| 2064 | module->runsize > sec->header.sh_addr - m_addr) |
| 2065 | module->runsize = sec->header.sh_addr - m_addr; |
| 2066 | } |
| 2067 | |
| 2068 | if (!arch_init_module(f, module)) |
| 2069 | return 0; |
| 2070 | |
| 2071 | /* Whew! All of the initialization is complete. Collect the final |
| 2072 | module image and give it to the kernel. */ |
| 2073 | |
| 2074 | image = xmalloc(m_size); |
| 2075 | obj_create_image(f, image); |
| 2076 | |
| 2077 | ret = new_sys_init_module(m_name, (struct new_module *) image); |
| 2078 | if (ret) |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 2079 | errorMsg("init_module: %s: %s", m_name, strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2080 | |
| 2081 | free(image); |
| 2082 | |
| 2083 | return ret == 0; |
| 2084 | } |
| 2085 | |
| 2086 | #else |
| 2087 | |
| 2088 | #define new_init_module(x, y, z) TRUE |
| 2089 | #define new_create_this_module(x, y) 0 |
| 2090 | #define new_create_module_ksymtab(x) |
| 2091 | |
| 2092 | #endif /* BB_FEATURE_INSMOD_OLD_KERNEL */ |
| 2093 | |
| 2094 | |
| 2095 | /*======================================================================*/ |
| 2096 | |
| 2097 | int |
| 2098 | obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, |
| 2099 | const char *string) |
| 2100 | { |
| 2101 | struct obj_string_patch *p; |
| 2102 | struct obj_section *strsec; |
| 2103 | size_t len = strlen(string) + 1; |
| 2104 | char *loc; |
| 2105 | |
| 2106 | p = xmalloc(sizeof(*p)); |
| 2107 | p->next = f->string_patches; |
| 2108 | p->reloc_secidx = secidx; |
| 2109 | p->reloc_offset = offset; |
| 2110 | f->string_patches = p; |
| 2111 | |
| 2112 | strsec = obj_find_section(f, ".kstrtab"); |
| 2113 | if (strsec == NULL) { |
| 2114 | strsec = obj_create_alloced_section(f, ".kstrtab", 1, len); |
| 2115 | p->string_offset = 0; |
| 2116 | loc = strsec->contents; |
| 2117 | } else { |
| 2118 | p->string_offset = strsec->header.sh_size; |
| 2119 | loc = obj_extend_section(strsec, len); |
| 2120 | } |
| 2121 | memcpy(loc, string, len); |
| 2122 | |
| 2123 | return 1; |
| 2124 | } |
| 2125 | |
| 2126 | int |
| 2127 | obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset, |
| 2128 | struct obj_symbol *sym) |
| 2129 | { |
| 2130 | struct obj_symbol_patch *p; |
| 2131 | |
| 2132 | p = xmalloc(sizeof(*p)); |
| 2133 | p->next = f->symbol_patches; |
| 2134 | p->reloc_secidx = secidx; |
| 2135 | p->reloc_offset = offset; |
| 2136 | p->sym = sym; |
| 2137 | f->symbol_patches = p; |
| 2138 | |
| 2139 | return 1; |
| 2140 | } |
| 2141 | |
| 2142 | int obj_check_undefineds(struct obj_file *f) |
| 2143 | { |
| 2144 | unsigned long i; |
| 2145 | int ret = 1; |
| 2146 | |
| 2147 | for (i = 0; i < HASH_BUCKETS; ++i) { |
| 2148 | struct obj_symbol *sym; |
| 2149 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 2150 | if (sym->secidx == SHN_UNDEF) { |
| 2151 | if (ELFW(ST_BIND) (sym->info) == STB_WEAK) { |
| 2152 | sym->secidx = SHN_ABS; |
| 2153 | sym->value = 0; |
| 2154 | } else { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2155 | errorMsg("unresolved symbol %s\n", sym->name); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2156 | ret = 0; |
| 2157 | } |
| 2158 | } |
| 2159 | } |
| 2160 | |
| 2161 | return ret; |
| 2162 | } |
| 2163 | |
| 2164 | void obj_allocate_commons(struct obj_file *f) |
| 2165 | { |
| 2166 | struct common_entry { |
| 2167 | struct common_entry *next; |
| 2168 | struct obj_symbol *sym; |
| 2169 | } *common_head = NULL; |
| 2170 | |
| 2171 | unsigned long i; |
| 2172 | |
| 2173 | for (i = 0; i < HASH_BUCKETS; ++i) { |
| 2174 | struct obj_symbol *sym; |
| 2175 | for (sym = f->symtab[i]; sym; sym = sym->next) |
| 2176 | if (sym->secidx == SHN_COMMON) { |
| 2177 | /* Collect all COMMON symbols and sort them by size so as to |
| 2178 | minimize space wasted by alignment requirements. */ |
| 2179 | { |
| 2180 | struct common_entry **p, *n; |
| 2181 | for (p = &common_head; *p; p = &(*p)->next) |
| 2182 | if (sym->size <= (*p)->sym->size) |
| 2183 | break; |
| 2184 | |
| 2185 | n = alloca(sizeof(*n)); |
| 2186 | n->next = *p; |
| 2187 | n->sym = sym; |
| 2188 | *p = n; |
| 2189 | } |
| 2190 | } |
| 2191 | } |
| 2192 | |
| 2193 | for (i = 1; i < f->local_symtab_size; ++i) { |
| 2194 | struct obj_symbol *sym = f->local_symtab[i]; |
| 2195 | if (sym && sym->secidx == SHN_COMMON) { |
| 2196 | struct common_entry **p, *n; |
| 2197 | for (p = &common_head; *p; p = &(*p)->next) |
| 2198 | if (sym == (*p)->sym) |
| 2199 | break; |
| 2200 | else if (sym->size < (*p)->sym->size) { |
| 2201 | n = alloca(sizeof(*n)); |
| 2202 | n->next = *p; |
| 2203 | n->sym = sym; |
| 2204 | *p = n; |
| 2205 | break; |
| 2206 | } |
| 2207 | } |
| 2208 | } |
| 2209 | |
| 2210 | if (common_head) { |
| 2211 | /* Find the bss section. */ |
| 2212 | for (i = 0; i < f->header.e_shnum; ++i) |
| 2213 | if (f->sections[i]->header.sh_type == SHT_NOBITS) |
| 2214 | break; |
| 2215 | |
| 2216 | /* If for some reason there hadn't been one, create one. */ |
| 2217 | if (i == f->header.e_shnum) { |
| 2218 | struct obj_section *sec; |
| 2219 | |
| 2220 | f->sections = xrealloc(f->sections, (i + 1) * sizeof(sec)); |
| 2221 | f->sections[i] = sec = arch_new_section(); |
| 2222 | f->header.e_shnum = i + 1; |
| 2223 | |
| 2224 | memset(sec, 0, sizeof(*sec)); |
| 2225 | sec->header.sh_type = SHT_PROGBITS; |
| 2226 | sec->header.sh_flags = SHF_WRITE | SHF_ALLOC; |
| 2227 | sec->name = ".bss"; |
| 2228 | sec->idx = i; |
| 2229 | } |
| 2230 | |
| 2231 | /* Allocate the COMMONS. */ |
| 2232 | { |
| 2233 | ElfW(Addr) bss_size = f->sections[i]->header.sh_size; |
| 2234 | ElfW(Addr) max_align = f->sections[i]->header.sh_addralign; |
| 2235 | struct common_entry *c; |
| 2236 | |
| 2237 | for (c = common_head; c; c = c->next) { |
| 2238 | ElfW(Addr) align = c->sym->value; |
| 2239 | |
| 2240 | if (align > max_align) |
| 2241 | max_align = align; |
| 2242 | if (bss_size & (align - 1)) |
| 2243 | bss_size = (bss_size | (align - 1)) + 1; |
| 2244 | |
| 2245 | c->sym->secidx = i; |
| 2246 | c->sym->value = bss_size; |
| 2247 | |
| 2248 | bss_size += c->sym->size; |
| 2249 | } |
| 2250 | |
| 2251 | f->sections[i]->header.sh_size = bss_size; |
| 2252 | f->sections[i]->header.sh_addralign = max_align; |
| 2253 | } |
| 2254 | } |
| 2255 | |
| 2256 | /* For the sake of patch relocation and parameter initialization, |
| 2257 | allocate zeroed data for NOBITS sections now. Note that after |
| 2258 | this we cannot assume NOBITS are really empty. */ |
| 2259 | for (i = 0; i < f->header.e_shnum; ++i) { |
| 2260 | struct obj_section *s = f->sections[i]; |
| 2261 | if (s->header.sh_type == SHT_NOBITS) { |
| 2262 | s->contents = memset(xmalloc(s->header.sh_size), |
| 2263 | 0, s->header.sh_size); |
| 2264 | s->header.sh_type = SHT_PROGBITS; |
| 2265 | } |
| 2266 | } |
| 2267 | } |
| 2268 | |
| 2269 | unsigned long obj_load_size(struct obj_file *f) |
| 2270 | { |
| 2271 | unsigned long dot = 0; |
| 2272 | struct obj_section *sec; |
| 2273 | |
| 2274 | /* Finalize the positions of the sections relative to one another. */ |
| 2275 | |
| 2276 | for (sec = f->load_order; sec; sec = sec->load_next) { |
| 2277 | ElfW(Addr) align; |
| 2278 | |
| 2279 | align = sec->header.sh_addralign; |
| 2280 | if (align && (dot & (align - 1))) |
| 2281 | dot = (dot | (align - 1)) + 1; |
| 2282 | |
| 2283 | sec->header.sh_addr = dot; |
| 2284 | dot += sec->header.sh_size; |
| 2285 | } |
| 2286 | |
| 2287 | return dot; |
| 2288 | } |
| 2289 | |
| 2290 | int obj_relocate(struct obj_file *f, ElfW(Addr) base) |
| 2291 | { |
| 2292 | int i, n = f->header.e_shnum; |
| 2293 | int ret = 1; |
| 2294 | |
| 2295 | /* Finalize the addresses of the sections. */ |
| 2296 | |
| 2297 | f->baseaddr = base; |
| 2298 | for (i = 0; i < n; ++i) |
| 2299 | f->sections[i]->header.sh_addr += base; |
| 2300 | |
| 2301 | /* And iterate over all of the relocations. */ |
| 2302 | |
| 2303 | for (i = 0; i < n; ++i) { |
| 2304 | struct obj_section *relsec, *symsec, *targsec, *strsec; |
| 2305 | ElfW(RelM) * rel, *relend; |
| 2306 | ElfW(Sym) * symtab; |
| 2307 | const char *strtab; |
| 2308 | |
| 2309 | relsec = f->sections[i]; |
| 2310 | if (relsec->header.sh_type != SHT_RELM) |
| 2311 | continue; |
| 2312 | |
| 2313 | symsec = f->sections[relsec->header.sh_link]; |
| 2314 | targsec = f->sections[relsec->header.sh_info]; |
| 2315 | strsec = f->sections[symsec->header.sh_link]; |
| 2316 | |
| 2317 | rel = (ElfW(RelM) *) relsec->contents; |
| 2318 | relend = rel + (relsec->header.sh_size / sizeof(ElfW(RelM))); |
| 2319 | symtab = (ElfW(Sym) *) symsec->contents; |
| 2320 | strtab = (const char *) strsec->contents; |
| 2321 | |
| 2322 | for (; rel < relend; ++rel) { |
| 2323 | ElfW(Addr) value = 0; |
| 2324 | struct obj_symbol *intsym = NULL; |
| 2325 | unsigned long symndx; |
| 2326 | ElfW(Sym) * extsym = 0; |
| 2327 | const char *errmsg; |
| 2328 | |
| 2329 | /* Attempt to find a value to use for this relocation. */ |
| 2330 | |
| 2331 | symndx = ELFW(R_SYM) (rel->r_info); |
| 2332 | if (symndx) { |
| 2333 | /* Note we've already checked for undefined symbols. */ |
| 2334 | |
| 2335 | extsym = &symtab[symndx]; |
| 2336 | if (ELFW(ST_BIND) (extsym->st_info) == STB_LOCAL) { |
| 2337 | /* Local symbols we look up in the local table to be sure |
| 2338 | we get the one that is really intended. */ |
| 2339 | intsym = f->local_symtab[symndx]; |
| 2340 | } else { |
| 2341 | /* Others we look up in the hash table. */ |
| 2342 | const char *name; |
| 2343 | if (extsym->st_name) |
| 2344 | name = strtab + extsym->st_name; |
| 2345 | else |
| 2346 | name = f->sections[extsym->st_shndx]->name; |
| 2347 | intsym = obj_find_symbol(f, name); |
| 2348 | } |
| 2349 | |
| 2350 | value = obj_symbol_final_value(f, intsym); |
| 2351 | intsym->referenced = 1; |
| 2352 | } |
| 2353 | #if SHT_RELM == SHT_RELA |
| 2354 | #if defined(__alpha__) && defined(AXP_BROKEN_GAS) |
| 2355 | /* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */ |
| 2356 | if (!extsym || !extsym->st_name || |
| 2357 | ELFW(ST_BIND) (extsym->st_info) != STB_LOCAL) |
| 2358 | #endif |
| 2359 | value += rel->r_addend; |
| 2360 | #endif |
| 2361 | |
| 2362 | /* Do it! */ |
| 2363 | switch (arch_apply_relocation |
| 2364 | (f, targsec, symsec, intsym, rel, value)) { |
| 2365 | case obj_reloc_ok: |
| 2366 | break; |
| 2367 | |
| 2368 | case obj_reloc_overflow: |
| 2369 | errmsg = "Relocation overflow"; |
| 2370 | goto bad_reloc; |
| 2371 | case obj_reloc_dangerous: |
| 2372 | errmsg = "Dangerous relocation"; |
| 2373 | goto bad_reloc; |
| 2374 | case obj_reloc_unhandled: |
| 2375 | errmsg = "Unhandled relocation"; |
| 2376 | bad_reloc: |
| 2377 | if (extsym) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2378 | errorMsg("%s of type %ld for %s\n", errmsg, |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2379 | (long) ELFW(R_TYPE) (rel->r_info), |
| 2380 | strtab + extsym->st_name); |
| 2381 | } else { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2382 | errorMsg("%s of type %ld\n", errmsg, |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2383 | (long) ELFW(R_TYPE) (rel->r_info)); |
| 2384 | } |
| 2385 | ret = 0; |
| 2386 | break; |
| 2387 | } |
| 2388 | } |
| 2389 | } |
| 2390 | |
| 2391 | /* Finally, take care of the patches. */ |
| 2392 | |
| 2393 | if (f->string_patches) { |
| 2394 | struct obj_string_patch *p; |
| 2395 | struct obj_section *strsec; |
| 2396 | ElfW(Addr) strsec_base; |
| 2397 | strsec = obj_find_section(f, ".kstrtab"); |
| 2398 | strsec_base = strsec->header.sh_addr; |
| 2399 | |
| 2400 | for (p = f->string_patches; p; p = p->next) { |
| 2401 | struct obj_section *targsec = f->sections[p->reloc_secidx]; |
| 2402 | *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) |
| 2403 | = strsec_base + p->string_offset; |
| 2404 | } |
| 2405 | } |
| 2406 | |
| 2407 | if (f->symbol_patches) { |
| 2408 | struct obj_symbol_patch *p; |
| 2409 | |
| 2410 | for (p = f->symbol_patches; p; p = p->next) { |
| 2411 | struct obj_section *targsec = f->sections[p->reloc_secidx]; |
| 2412 | *(ElfW(Addr) *) (targsec->contents + p->reloc_offset) |
| 2413 | = obj_symbol_final_value(f, p->sym); |
| 2414 | } |
| 2415 | } |
| 2416 | |
| 2417 | return ret; |
| 2418 | } |
| 2419 | |
| 2420 | int obj_create_image(struct obj_file *f, char *image) |
| 2421 | { |
| 2422 | struct obj_section *sec; |
| 2423 | ElfW(Addr) base = f->baseaddr; |
| 2424 | |
| 2425 | for (sec = f->load_order; sec; sec = sec->load_next) { |
| 2426 | char *secimg; |
| 2427 | |
| 2428 | if (sec->header.sh_size == 0) |
| 2429 | continue; |
| 2430 | |
| 2431 | secimg = image + (sec->header.sh_addr - base); |
| 2432 | |
| 2433 | /* Note that we allocated data for NOBITS sections earlier. */ |
| 2434 | memcpy(secimg, sec->contents, sec->header.sh_size); |
| 2435 | } |
| 2436 | |
| 2437 | return 1; |
| 2438 | } |
| 2439 | |
| 2440 | /*======================================================================*/ |
| 2441 | |
| 2442 | struct obj_file *obj_load(FILE * fp) |
| 2443 | { |
| 2444 | struct obj_file *f; |
| 2445 | ElfW(Shdr) * section_headers; |
| 2446 | int shnum, i; |
| 2447 | char *shstrtab; |
| 2448 | |
| 2449 | /* Read the file header. */ |
| 2450 | |
| 2451 | f = arch_new_file(); |
| 2452 | memset(f, 0, sizeof(*f)); |
| 2453 | f->symbol_cmp = strcmp; |
| 2454 | f->symbol_hash = obj_elf_hash; |
| 2455 | f->load_order_search_start = &f->load_order; |
| 2456 | |
| 2457 | fseek(fp, 0, SEEK_SET); |
| 2458 | if (fread(&f->header, sizeof(f->header), 1, fp) != 1) { |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 2459 | errorMsg("error reading ELF header: %s", strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2460 | return NULL; |
| 2461 | } |
| 2462 | |
| 2463 | if (f->header.e_ident[EI_MAG0] != ELFMAG0 |
| 2464 | || f->header.e_ident[EI_MAG1] != ELFMAG1 |
| 2465 | || f->header.e_ident[EI_MAG2] != ELFMAG2 |
| 2466 | || f->header.e_ident[EI_MAG3] != ELFMAG3) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2467 | errorMsg("not an ELF file\n"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2468 | return NULL; |
| 2469 | } |
| 2470 | if (f->header.e_ident[EI_CLASS] != ELFCLASSM |
| 2471 | || f->header.e_ident[EI_DATA] != ELFDATAM |
| 2472 | || f->header.e_ident[EI_VERSION] != EV_CURRENT |
| 2473 | || !MATCH_MACHINE(f->header.e_machine)) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2474 | errorMsg("ELF file not for this architecture\n"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2475 | return NULL; |
| 2476 | } |
| 2477 | if (f->header.e_type != ET_REL) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2478 | errorMsg("ELF file not a relocatable object\n"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2479 | return NULL; |
| 2480 | } |
| 2481 | |
| 2482 | /* Read the section headers. */ |
| 2483 | |
| 2484 | if (f->header.e_shentsize != sizeof(ElfW(Shdr))) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2485 | errorMsg("section header size mismatch: %lu != %lu\n", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2486 | (unsigned long) f->header.e_shentsize, |
| 2487 | (unsigned long) sizeof(ElfW(Shdr))); |
| 2488 | return NULL; |
| 2489 | } |
| 2490 | |
| 2491 | shnum = f->header.e_shnum; |
| 2492 | f->sections = xmalloc(sizeof(struct obj_section *) * shnum); |
| 2493 | memset(f->sections, 0, sizeof(struct obj_section *) * shnum); |
| 2494 | |
| 2495 | section_headers = alloca(sizeof(ElfW(Shdr)) * shnum); |
| 2496 | fseek(fp, f->header.e_shoff, SEEK_SET); |
| 2497 | if (fread(section_headers, sizeof(ElfW(Shdr)), shnum, fp) != shnum) { |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 2498 | errorMsg("error reading ELF section headers: %s", strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2499 | return NULL; |
| 2500 | } |
| 2501 | |
| 2502 | /* Read the section data. */ |
| 2503 | |
| 2504 | for (i = 0; i < shnum; ++i) { |
| 2505 | struct obj_section *sec; |
| 2506 | |
| 2507 | f->sections[i] = sec = arch_new_section(); |
| 2508 | memset(sec, 0, sizeof(*sec)); |
| 2509 | |
| 2510 | sec->header = section_headers[i]; |
| 2511 | sec->idx = i; |
| 2512 | |
| 2513 | switch (sec->header.sh_type) { |
| 2514 | case SHT_NULL: |
| 2515 | case SHT_NOTE: |
| 2516 | case SHT_NOBITS: |
| 2517 | /* ignore */ |
| 2518 | break; |
| 2519 | |
| 2520 | case SHT_PROGBITS: |
| 2521 | case SHT_SYMTAB: |
| 2522 | case SHT_STRTAB: |
| 2523 | case SHT_RELM: |
| 2524 | if (sec->header.sh_size > 0) { |
| 2525 | sec->contents = xmalloc(sec->header.sh_size); |
| 2526 | fseek(fp, sec->header.sh_offset, SEEK_SET); |
| 2527 | if (fread(sec->contents, sec->header.sh_size, 1, fp) != 1) { |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 2528 | errorMsg("error reading ELF section data: %s", strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2529 | return NULL; |
| 2530 | } |
| 2531 | } else { |
| 2532 | sec->contents = NULL; |
| 2533 | } |
| 2534 | break; |
| 2535 | |
| 2536 | #if SHT_RELM == SHT_REL |
| 2537 | case SHT_RELA: |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2538 | errorMsg("RELA relocations not supported on this architecture\n"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2539 | return NULL; |
| 2540 | #else |
| 2541 | case SHT_REL: |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2542 | errorMsg("REL relocations not supported on this architecture\n"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2543 | return NULL; |
| 2544 | #endif |
| 2545 | |
| 2546 | default: |
| 2547 | if (sec->header.sh_type >= SHT_LOPROC) { |
| 2548 | /* Assume processor specific section types are debug |
| 2549 | info and can safely be ignored. If this is ever not |
| 2550 | the case (Hello MIPS?), don't put ifdefs here but |
| 2551 | create an arch_load_proc_section(). */ |
| 2552 | break; |
| 2553 | } |
| 2554 | |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2555 | errorMsg("can't handle sections of type %ld\n", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2556 | (long) sec->header.sh_type); |
| 2557 | return NULL; |
| 2558 | } |
| 2559 | } |
| 2560 | |
| 2561 | /* Do what sort of interpretation as needed by each section. */ |
| 2562 | |
| 2563 | shstrtab = f->sections[f->header.e_shstrndx]->contents; |
| 2564 | |
| 2565 | for (i = 0; i < shnum; ++i) { |
| 2566 | struct obj_section *sec = f->sections[i]; |
| 2567 | sec->name = shstrtab + sec->header.sh_name; |
| 2568 | } |
| 2569 | |
| 2570 | for (i = 0; i < shnum; ++i) { |
| 2571 | struct obj_section *sec = f->sections[i]; |
| 2572 | |
| 2573 | if (sec->header.sh_flags & SHF_ALLOC) |
| 2574 | obj_insert_section_load_order(f, sec); |
| 2575 | |
| 2576 | switch (sec->header.sh_type) { |
| 2577 | case SHT_SYMTAB: |
| 2578 | { |
| 2579 | unsigned long nsym, j; |
| 2580 | char *strtab; |
| 2581 | ElfW(Sym) * sym; |
| 2582 | |
| 2583 | if (sec->header.sh_entsize != sizeof(ElfW(Sym))) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2584 | errorMsg("symbol size mismatch: %lu != %lu\n", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2585 | (unsigned long) sec->header.sh_entsize, |
| 2586 | (unsigned long) sizeof(ElfW(Sym))); |
| 2587 | return NULL; |
| 2588 | } |
| 2589 | |
| 2590 | nsym = sec->header.sh_size / sizeof(ElfW(Sym)); |
| 2591 | strtab = f->sections[sec->header.sh_link]->contents; |
| 2592 | sym = (ElfW(Sym) *) sec->contents; |
| 2593 | |
| 2594 | /* Allocate space for a table of local symbols. */ |
| 2595 | j = f->local_symtab_size = sec->header.sh_info; |
| 2596 | f->local_symtab = xmalloc(j *= |
| 2597 | sizeof(struct obj_symbol *)); |
| 2598 | memset(f->local_symtab, 0, j); |
| 2599 | |
| 2600 | /* Insert all symbols into the hash table. */ |
| 2601 | for (j = 1, ++sym; j < nsym; ++j, ++sym) { |
| 2602 | const char *name; |
| 2603 | if (sym->st_name) |
| 2604 | name = strtab + sym->st_name; |
| 2605 | else |
| 2606 | name = f->sections[sym->st_shndx]->name; |
| 2607 | |
| 2608 | obj_add_symbol(f, name, j, sym->st_info, sym->st_shndx, |
| 2609 | sym->st_value, sym->st_size); |
| 2610 | } |
| 2611 | } |
| 2612 | break; |
| 2613 | |
| 2614 | case SHT_RELM: |
| 2615 | if (sec->header.sh_entsize != sizeof(ElfW(RelM))) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2616 | errorMsg("relocation entry size mismatch: %lu != %lu\n", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2617 | (unsigned long) sec->header.sh_entsize, |
| 2618 | (unsigned long) sizeof(ElfW(RelM))); |
| 2619 | return NULL; |
| 2620 | } |
| 2621 | break; |
| 2622 | } |
| 2623 | } |
| 2624 | |
| 2625 | return f; |
| 2626 | } |
| 2627 | |
| 2628 | static void hide_special_symbols(struct obj_file *f) |
| 2629 | { |
| 2630 | static const char *const specials[] = { |
| 2631 | "cleanup_module", |
| 2632 | "init_module", |
| 2633 | "kernel_version", |
| 2634 | NULL |
| 2635 | }; |
| 2636 | |
| 2637 | struct obj_symbol *sym; |
| 2638 | const char *const *p; |
| 2639 | |
| 2640 | for (p = specials; *p; ++p) |
| 2641 | if ((sym = obj_find_symbol(f, *p)) != NULL) |
| 2642 | sym->info = |
| 2643 | ELFW(ST_INFO) (STB_LOCAL, ELFW(ST_TYPE) (sym->info)); |
| 2644 | } |
| 2645 | |
| 2646 | |
| 2647 | |
| 2648 | extern int insmod_main( int argc, char **argv) |
| 2649 | { |
| 2650 | int k_crcs; |
| 2651 | int k_new_syscalls; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2652 | int len; |
| 2653 | char *tmp; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2654 | unsigned long m_size; |
| 2655 | ElfW(Addr) m_addr; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2656 | FILE *fp; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2657 | struct obj_file *f; |
| 2658 | char m_name[BUFSIZ + 1] = "\0"; |
| 2659 | int exit_status = FALSE; |
| 2660 | int m_has_modinfo; |
| 2661 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 2662 | int k_version; |
| 2663 | char k_strversion[STRVERSIONLEN]; |
| 2664 | char m_strversion[STRVERSIONLEN]; |
| 2665 | int m_version; |
| 2666 | int m_crcs; |
| 2667 | #endif |
| 2668 | |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 2669 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2670 | if (argc <= 1) { |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 2671 | usage(insmod_usage); |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 2672 | } |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 2673 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2674 | /* Parse any options */ |
| 2675 | while (--argc > 0 && **(++argv) == '-') { |
| 2676 | while (*(++(*argv))) { |
| 2677 | switch (**argv) { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2678 | case 'f': /* force loading */ |
| 2679 | flag_force_load = 1; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2680 | break; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2681 | case 'k': /* module loaded by kerneld, auto-cleanable */ |
| 2682 | flag_autoclean = 1; |
| 2683 | break; |
| 2684 | case 'v': /* verbose output */ |
| 2685 | flag_verbose = 1; |
| 2686 | break; |
| 2687 | case 'x': /* do not export externs */ |
| 2688 | flag_export = 0; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2689 | break; |
| 2690 | default: |
| 2691 | usage(insmod_usage); |
| 2692 | } |
| 2693 | } |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 2694 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2695 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2696 | if (argc <= 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2697 | usage(insmod_usage); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2698 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2699 | /* Grab the module name */ |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2700 | if ((tmp = strrchr(*argv, '/')) != NULL) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2701 | tmp++; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2702 | } else { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2703 | tmp = *argv; |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2704 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2705 | len = strlen(tmp); |
| 2706 | |
| 2707 | if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') |
| 2708 | len -= 2; |
| 2709 | memcpy(m_name, tmp, len); |
| 2710 | strcpy(m_fullName, m_name); |
| 2711 | strcat(m_fullName, ".o"); |
| 2712 | |
| 2713 | /* Get a filedesc for the module */ |
| 2714 | if ((fp = fopen(*argv, "r")) == NULL) { |
| 2715 | /* Hmpf. Could not open it. Search through _PATH_MODULES to find a module named m_name */ |
| 2716 | if (recursiveAction(_PATH_MODULES, TRUE, FALSE, FALSE, |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2717 | findNamedModule, 0, m_fullName) == TRUE) |
| 2718 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2719 | if (m_filename[0] == '\0' |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2720 | || ((fp = fopen(m_filename, "r")) == NULL)) |
| 2721 | { |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 2722 | errorMsg("No module named '%s' found in '%s'\n", m_fullName, _PATH_MODULES); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2723 | exit(FALSE); |
| 2724 | } |
| 2725 | } |
| 2726 | } else |
| 2727 | memcpy(m_filename, *argv, strlen(*argv)); |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 2728 | |
| 2729 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2730 | if ((f = obj_load(fp)) == NULL) { |
| 2731 | perror("Could not load the module\n"); |
| 2732 | exit(FALSE); |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 2733 | } |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 2734 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2735 | if (get_modinfo_value(f, "kernel_version") == NULL) |
| 2736 | m_has_modinfo = 0; |
| 2737 | else |
| 2738 | m_has_modinfo = 1; |
| 2739 | |
| 2740 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 2741 | /* Version correspondence? */ |
| 2742 | |
| 2743 | k_version = get_kernel_version(k_strversion); |
| 2744 | if (m_has_modinfo) { |
| 2745 | m_version = new_get_module_version(f, m_strversion); |
| 2746 | } else { |
| 2747 | m_version = old_get_module_version(f, m_strversion); |
| 2748 | if (m_version == -1) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2749 | errorMsg("couldn't find the kernel version the module was " |
| 2750 | "compiled for\n"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2751 | goto out; |
| 2752 | } |
| 2753 | } |
| 2754 | |
| 2755 | if (strncmp(k_strversion, m_strversion, STRVERSIONLEN) != 0) { |
| 2756 | if (flag_force_load) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2757 | errorMsg("Warning: kernel-module version mismatch\n" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2758 | "\t%s was compiled for kernel version %s\n" |
| 2759 | "\twhile this kernel is version %s\n", |
| 2760 | m_filename, m_strversion, k_strversion); |
| 2761 | } else { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2762 | errorMsg("kernel-module version mismatch\n" |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2763 | "\t%s was compiled for kernel version %s\n" |
| 2764 | "\twhile this kernel is version %s.\n", |
| 2765 | m_filename, m_strversion, k_strversion); |
| 2766 | goto out; |
| 2767 | } |
| 2768 | } |
| 2769 | k_crcs = 0; |
| 2770 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 2771 | |
| 2772 | k_new_syscalls = !query_module(NULL, 0, NULL, 0, NULL); |
| 2773 | |
| 2774 | if (k_new_syscalls) { |
| 2775 | #ifdef BB_FEATURE_INSMOD_NEW_KERNEL |
| 2776 | if (!new_get_kernel_symbols()) |
| 2777 | goto out; |
| 2778 | k_crcs = new_is_kernel_checksummed(); |
| 2779 | #else |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2780 | errorMsg("Not configured to support new kernels\n"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2781 | goto out; |
| 2782 | #endif |
| 2783 | } else { |
| 2784 | #ifdef BB_FEATURE_INSMOD_OLD_KERNEL |
| 2785 | if (!old_get_kernel_symbols()) |
| 2786 | goto out; |
| 2787 | k_crcs = old_is_kernel_checksummed(); |
| 2788 | #else |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2789 | errorMsg("Not configured to support old kernels\n"); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2790 | goto out; |
| 2791 | #endif |
| 2792 | } |
| 2793 | |
| 2794 | #ifdef BB_FEATURE_INSMOD_VERSION_CHECKING |
| 2795 | if (m_has_modinfo) |
| 2796 | m_crcs = new_is_module_checksummed(f); |
| 2797 | else |
| 2798 | m_crcs = old_is_module_checksummed(f); |
| 2799 | |
| 2800 | if (m_crcs != k_crcs) |
| 2801 | obj_set_symbol_compare(f, ncv_strcmp, ncv_symbol_hash); |
| 2802 | #endif /* BB_FEATURE_INSMOD_VERSION_CHECKING */ |
| 2803 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2804 | /* Let the module know about the kernel symbols. */ |
| 2805 | add_kernel_symbols(f); |
| 2806 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2807 | /* Allocate common symbols, symbol tables, and string tables. */ |
| 2808 | |
| 2809 | if (k_new_syscalls |
| 2810 | ? !new_create_this_module(f, m_name) |
| 2811 | : !old_create_mod_use_count(f)) |
| 2812 | { |
| 2813 | goto out; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2814 | } |
| 2815 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2816 | if (!obj_check_undefineds(f)) { |
| 2817 | goto out; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2818 | } |
| 2819 | obj_allocate_commons(f); |
| 2820 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2821 | if (optind < argc) { |
| 2822 | if (m_has_modinfo |
| 2823 | ? !new_process_module_arguments(f, argc - optind, argv + optind) |
| 2824 | : !old_process_module_arguments(f, argc - optind, argv + optind)) |
| 2825 | { |
| 2826 | goto out; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2827 | } |
| 2828 | } |
| 2829 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2830 | arch_create_got(f); |
| 2831 | hide_special_symbols(f); |
| 2832 | |
| 2833 | if (k_new_syscalls) |
| 2834 | new_create_module_ksymtab(f); |
| 2835 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2836 | /* Find current size of the module */ |
| 2837 | m_size = obj_load_size(f); |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 2838 | |
| 2839 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2840 | errno = 0; |
| 2841 | m_addr = create_module(m_name, m_size); |
| 2842 | switch (errno) { |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2843 | case 0: |
| 2844 | break; |
| 2845 | case EEXIST: |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2846 | errorMsg("A module named %s already exists\n", m_name); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2847 | goto out; |
| 2848 | case ENOMEM: |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame^] | 2849 | errorMsg("Can't allocate kernel memory for module; needed %lu bytes\n", |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2850 | m_size); |
| 2851 | goto out; |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 2852 | default: |
Eric Andersen | 8a24a67 | 2000-06-22 18:19:31 +0000 | [diff] [blame] | 2853 | errorMsg("create_module: %s: %s", m_name, strerror(errno)); |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2854 | goto out; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2855 | } |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 2856 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2857 | if (!obj_relocate(f, m_addr)) { |
| 2858 | delete_module(m_name); |
| 2859 | goto out; |
| 2860 | } |
Erik Andersen | d387d01 | 1999-12-21 02:55:11 +0000 | [diff] [blame] | 2861 | |
Eric Andersen | 9f16d61 | 2000-06-12 23:11:16 +0000 | [diff] [blame] | 2862 | if (k_new_syscalls |
| 2863 | ? !new_init_module(m_name, f, m_size) |
| 2864 | : !old_init_module(m_name, f, m_size)) |
| 2865 | { |
| 2866 | delete_module(m_name); |
| 2867 | goto out; |
| 2868 | } |
| 2869 | |
| 2870 | exit_status = TRUE; |
| 2871 | |
| 2872 | out: |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 2873 | fclose(fp); |
Eric Andersen | bb245ba | 2000-06-19 19:53:30 +0000 | [diff] [blame] | 2874 | return(exit_status); |
Erik Andersen | 0210432 | 1999-12-17 18:57:34 +0000 | [diff] [blame] | 2875 | } |