1/*- 2 * Copyright (c) 2007-2013 Kai Wang 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/param.h> 28#include <sys/stat.h> 29 30#include <err.h> 31#include <errno.h> 32#include <fcntl.h> 33#include <getopt.h> 34#include <libelftc.h> 35#include <stdio.h> 36#include <stdlib.h> 37#include <string.h> 38#include <unistd.h> 39 40#include "elfcopy.h" 41 42ELFTC_VCSID("$Id: main.c 3757 2019-06-28 01:15:28Z emaste $"); 43 44enum options 45{ 46 ECP_ADD_GNU_DEBUGLINK, 47 ECP_ADD_SECTION, 48 ECP_CHANGE_ADDR, 49 ECP_CHANGE_SEC_ADDR, 50 ECP_CHANGE_SEC_LMA, 51 ECP_CHANGE_SEC_VMA, 52 ECP_CHANGE_START, 53 ECP_CHANGE_WARN, 54 ECP_GAP_FILL, 55 ECP_GLOBALIZE_SYMBOL, 56 ECP_GLOBALIZE_SYMBOLS, 57 ECP_KEEP_SYMBOLS, 58 ECP_KEEP_GLOBAL_SYMBOLS, 59 ECP_LOCALIZE_HIDDEN, 60 ECP_LOCALIZE_SYMBOLS, 61 ECP_NO_CHANGE_WARN, 62 ECP_ONLY_DEBUG, 63 ECP_ONLY_DWO, 64 ECP_PAD_TO, 65 ECP_PREFIX_ALLOC, 66 ECP_PREFIX_SEC, 67 ECP_PREFIX_SYM, 68 ECP_REDEF_SYMBOL, 69 ECP_REDEF_SYMBOLS, 70 ECP_RENAME_SECTION, 71 ECP_SET_OSABI, 72 ECP_SET_SEC_FLAGS, 73 ECP_SET_START, 74 ECP_SREC_FORCE_S3, 75 ECP_SREC_LEN, 76 ECP_STRIP_DWO, 77 ECP_STRIP_SYMBOLS, 78 ECP_STRIP_UNNEEDED, 79 ECP_WEAKEN_ALL, 80 ECP_WEAKEN_SYMBOLS 81}; 82 83static struct option mcs_longopts[] = 84{ 85 { "help", no_argument, NULL, 'h' }, 86 { "version", no_argument, NULL, 'V' }, 87 { NULL, 0, NULL, 0 } 88}; 89 90static struct option strip_longopts[] = 91{ 92 {"discard-all", no_argument, NULL, 'x'}, 93 {"discard-locals", no_argument, NULL, 'X'}, 94 {"help", no_argument, NULL, 'h'}, 95 {"input-target", required_argument, NULL, 'I'}, 96 {"keep-symbol", required_argument, NULL, 'K'}, 97 {"only-keep-debug", no_argument, NULL, ECP_ONLY_DEBUG}, 98 {"output-file", required_argument, NULL, 'o'}, 99 {"output-target", required_argument, NULL, 'O'}, 100 {"preserve-dates", no_argument, NULL, 'p'}, 101 {"remove-section", required_argument, NULL, 'R'}, 102 {"strip-all", no_argument, NULL, 's'}, 103 {"strip-debug", no_argument, NULL, 'S'}, 104 {"strip-symbol", required_argument, NULL, 'N'}, 105 {"strip-unneeded", no_argument, NULL, ECP_STRIP_UNNEEDED}, 106 {"version", no_argument, NULL, 'V'}, 107 {"wildcard", no_argument, NULL, 'w'}, 108 {NULL, 0, NULL, 0} 109}; 110 111static struct option elfcopy_longopts[] = 112{ 113 {"add-gnu-debuglink", required_argument, NULL, ECP_ADD_GNU_DEBUGLINK}, 114 {"add-section", required_argument, NULL, ECP_ADD_SECTION}, 115 {"adjust-section-vma", required_argument, NULL, ECP_CHANGE_SEC_ADDR}, 116 {"adjust-vma", required_argument, NULL, ECP_CHANGE_ADDR}, 117 {"adjust-start", required_argument, NULL, ECP_CHANGE_START}, 118 {"adjust-warnings", no_argument, NULL, ECP_CHANGE_WARN}, 119 {"binary-architecture", required_argument, NULL, 'B'}, 120 {"change-addresses", required_argument, NULL, ECP_CHANGE_ADDR}, 121 {"change-section-address", required_argument, NULL, 122 ECP_CHANGE_SEC_ADDR}, 123 {"change-section-lma", required_argument, NULL, ECP_CHANGE_SEC_LMA}, 124 {"change-section-vma", required_argument, NULL, ECP_CHANGE_SEC_VMA}, 125 {"change-start", required_argument, NULL, ECP_CHANGE_START}, 126 {"change-warnings", no_argument, NULL, ECP_CHANGE_WARN}, 127 {"discard-all", no_argument, NULL, 'x'}, 128 {"discard-locals", no_argument, NULL, 'X'}, 129 {"extract-dwo", no_argument, NULL, ECP_ONLY_DWO}, 130 {"gap-fill", required_argument, NULL, ECP_GAP_FILL}, 131 {"globalize-symbol", required_argument, NULL, ECP_GLOBALIZE_SYMBOL}, 132 {"globalize-symbols", required_argument, NULL, ECP_GLOBALIZE_SYMBOLS}, 133 {"help", no_argument, NULL, 'h'}, 134 {"input-target", required_argument, NULL, 'I'}, 135 {"keep-symbol", required_argument, NULL, 'K'}, 136 {"keep-symbols", required_argument, NULL, ECP_KEEP_SYMBOLS}, 137 {"keep-global-symbol", required_argument, NULL, 'G'}, 138 {"keep-global-symbols", required_argument, NULL, 139 ECP_KEEP_GLOBAL_SYMBOLS}, 140 {"localize-hidden", no_argument, NULL, ECP_LOCALIZE_HIDDEN}, 141 {"localize-symbol", required_argument, NULL, 'L'}, 142 {"localize-symbols", required_argument, NULL, ECP_LOCALIZE_SYMBOLS}, 143 {"no-adjust-warnings", no_argument, NULL, ECP_NO_CHANGE_WARN}, 144 {"no-change-warnings", no_argument, NULL, ECP_NO_CHANGE_WARN}, 145 {"only-keep-debug", no_argument, NULL, ECP_ONLY_DEBUG}, 146 {"only-section", required_argument, NULL, 'j'}, 147 {"osabi", required_argument, NULL, ECP_SET_OSABI}, 148 {"output-target", required_argument, NULL, 'O'}, 149 {"pad-to", required_argument, NULL, ECP_PAD_TO}, 150 {"preserve-dates", no_argument, NULL, 'p'}, 151 {"prefix-alloc-sections", required_argument, NULL, ECP_PREFIX_ALLOC}, 152 {"prefix-sections", required_argument, NULL, ECP_PREFIX_SEC}, 153 {"prefix-symbols", required_argument, NULL, ECP_PREFIX_SYM}, 154 {"redefine-sym", required_argument, NULL, ECP_REDEF_SYMBOL}, 155 {"redefine-syms", required_argument, NULL, ECP_REDEF_SYMBOLS}, 156 {"remove-section", required_argument, NULL, 'R'}, 157 {"rename-section", required_argument, NULL, ECP_RENAME_SECTION}, 158 {"set-section-flags", required_argument, NULL, ECP_SET_SEC_FLAGS}, 159 {"set-start", required_argument, NULL, ECP_SET_START}, 160 {"srec-forceS3", no_argument, NULL, ECP_SREC_FORCE_S3}, 161 {"srec-len", required_argument, NULL, ECP_SREC_LEN}, 162 {"strip-all", no_argument, NULL, 'S'}, 163 {"strip-debug", no_argument, 0, 'g'}, 164 {"strip-dwo", no_argument, NULL, ECP_STRIP_DWO}, 165 {"strip-symbol", required_argument, NULL, 'N'}, 166 {"strip-symbols", required_argument, NULL, ECP_STRIP_SYMBOLS}, 167 {"strip-unneeded", no_argument, NULL, ECP_STRIP_UNNEEDED}, 168 {"version", no_argument, NULL, 'V'}, 169 {"weaken", no_argument, NULL, ECP_WEAKEN_ALL}, 170 {"weaken-symbol", required_argument, NULL, 'W'}, 171 {"weaken-symbols", required_argument, NULL, ECP_WEAKEN_SYMBOLS}, 172 {"wildcard", no_argument, NULL, 'w'}, 173 {NULL, 0, NULL, 0} 174}; 175 176static struct { 177 const char *name; 178 int value; 179} sec_flags[] = { 180 {"alloc", SF_ALLOC}, 181 {"load", SF_LOAD}, 182 {"noload", SF_NOLOAD}, 183 {"readonly", SF_READONLY}, 184 {"debug", SF_DEBUG}, 185 {"code", SF_CODE}, 186 {"data", SF_DATA}, 187 {"rom", SF_ROM}, 188 {"share", SF_SHARED}, 189 {"contents", SF_CONTENTS}, 190 {NULL, 0} 191}; 192 193static struct { 194 const char *name; 195 int abi; 196} osabis[] = { 197 {"sysv", ELFOSABI_SYSV}, 198 {"hpus", ELFOSABI_HPUX}, 199 {"netbsd", ELFOSABI_NETBSD}, 200 {"linux", ELFOSABI_LINUX}, 201 {"hurd", ELFOSABI_HURD}, 202 {"86open", ELFOSABI_86OPEN}, 203 {"solaris", ELFOSABI_SOLARIS}, 204 {"aix", ELFOSABI_AIX}, 205 {"irix", ELFOSABI_IRIX}, 206 {"freebsd", ELFOSABI_FREEBSD}, 207 {"tru64", ELFOSABI_TRU64}, 208 {"modesto", ELFOSABI_MODESTO}, 209 {"openbsd", ELFOSABI_OPENBSD}, 210 {"openvms", ELFOSABI_OPENVMS}, 211 {"nsk", ELFOSABI_NSK}, 212 {"cloudabi", ELFOSABI_CLOUDABI}, 213 {"arm", ELFOSABI_ARM}, 214 {"standalone", ELFOSABI_STANDALONE}, 215 {NULL, 0} 216}; 217 218static int copy_from_tempfile(const char *src, const char *dst, 219 int infd, int *outfd, int in_place); 220static void create_file(struct elfcopy *ecp, const char *src, 221 const char *dst); 222static void elfcopy_main(struct elfcopy *ecp, int argc, char **argv); 223static void elfcopy_usage(void); 224static void mcs_main(struct elfcopy *ecp, int argc, char **argv); 225static void mcs_usage(void); 226static void parse_sec_address_op(struct elfcopy *ecp, int optnum, 227 const char *optname, char *s); 228static void parse_sec_flags(struct sec_action *sac, char *s); 229static void parse_symlist_file(struct elfcopy *ecp, const char *fn, 230 unsigned int op); 231static void print_version(void); 232static void set_input_target(struct elfcopy *ecp, const char *target_name); 233static void set_osabi(struct elfcopy *ecp, const char *abi); 234static void set_output_target(struct elfcopy *ecp, const char *target_name); 235static void strip_main(struct elfcopy *ecp, int argc, char **argv); 236static void strip_usage(void); 237 238/* 239 * An ELF object usually has a structure described by the 240 * diagram below. 241 * _____________ 242 * | | 243 * | NULL | <- always a SHT_NULL section 244 * |_____________| 245 * | | 246 * | .interp | 247 * |_____________| 248 * | | 249 * | ... | 250 * |_____________| 251 * | | 252 * | .text | 253 * |_____________| 254 * | | 255 * | ... | 256 * |_____________| 257 * | | 258 * | .comment | <- above(include) this: normal sections 259 * |_____________| 260 * | | 261 * | add sections| <- unloadable sections added by --add-section 262 * |_____________| 263 * | | 264 * | .shstrtab | <- section name string table 265 * |_____________| 266 * | | 267 * | shdrs | <- section header table 268 * |_____________| 269 * | | 270 * | .symtab | <- symbol table, if any 271 * |_____________| 272 * | | 273 * | .strtab | <- symbol name string table, if any 274 * |_____________| 275 * | | 276 * | .rel.text | <- relocation info for .o files. 277 * |_____________| 278 */ 279void 280create_elf(struct elfcopy *ecp) 281{ 282 struct section *shtab; 283 GElf_Ehdr ieh; 284 GElf_Ehdr oeh; 285 size_t ishnum; 286 287 ecp->flags |= SYMTAB_INTACT; 288 ecp->flags &= ~SYMTAB_EXIST; 289 290 /* Create EHDR. */ 291 if (gelf_getehdr(ecp->ein, &ieh) == NULL) 292 errx(EXIT_FAILURE, "gelf_getehdr() failed: %s", 293 elf_errmsg(-1)); 294 if ((ecp->iec = gelf_getclass(ecp->ein)) == ELFCLASSNONE) 295 errx(EXIT_FAILURE, "getclass() failed: %s", 296 elf_errmsg(-1)); 297 298 if (ecp->oec == ELFCLASSNONE) 299 ecp->oec = ecp->iec; 300 if (ecp->oed == ELFDATANONE) 301 ecp->oed = ieh.e_ident[EI_DATA]; 302 303 if (gelf_newehdr(ecp->eout, ecp->oec) == NULL) 304 errx(EXIT_FAILURE, "gelf_newehdr failed: %s", 305 elf_errmsg(-1)); 306 if (gelf_getehdr(ecp->eout, &oeh) == NULL) 307 errx(EXIT_FAILURE, "gelf_getehdr() failed: %s", 308 elf_errmsg(-1)); 309 310 memcpy(oeh.e_ident, ieh.e_ident, sizeof(ieh.e_ident)); 311 oeh.e_ident[EI_CLASS] = ecp->oec; 312 oeh.e_ident[EI_DATA] = ecp->oed; 313 if (ecp->abi != -1) 314 oeh.e_ident[EI_OSABI] = ecp->abi; 315 oeh.e_flags = ieh.e_flags; 316 oeh.e_machine = ieh.e_machine; 317 oeh.e_type = ieh.e_type; 318 oeh.e_entry = ieh.e_entry; 319 oeh.e_version = ieh.e_version; 320 321 ecp->flags &= ~(EXECUTABLE | DYNAMIC | RELOCATABLE); 322 if (ieh.e_type == ET_EXEC) 323 ecp->flags |= EXECUTABLE; 324 else if (ieh.e_type == ET_DYN) 325 ecp->flags |= DYNAMIC; 326 else if (ieh.e_type == ET_REL) 327 ecp->flags |= RELOCATABLE; 328 else 329 errx(EXIT_FAILURE, "unsupported e_type"); 330 331 if (!elf_getshnum(ecp->ein, &ishnum)) 332 errx(EXIT_FAILURE, "elf_getshnum failed: %s", 333 elf_errmsg(-1)); 334 if (ishnum > 0 && (ecp->secndx = calloc(ishnum, 335 sizeof(*ecp->secndx))) == NULL) 336 err(EXIT_FAILURE, "calloc failed"); 337 338 /* Read input object program header. */ 339 setup_phdr(ecp); 340 341 /* 342 * Scan of input sections: we iterate through sections from input 343 * object, skip sections need to be stripped, allot Elf_Scn and 344 * create internal section structure for sections we want. 345 * (i.e., determine output sections) 346 */ 347 create_scn(ecp); 348 349 /* Apply section address changes, if any. */ 350 adjust_addr(ecp); 351 352 /* 353 * Determine if the symbol table needs to be changed based on 354 * command line options. 355 */ 356 if (ecp->strip == STRIP_DEBUG || 357 ecp->strip == STRIP_UNNEEDED || 358 ecp->flags & WEAKEN_ALL || 359 ecp->flags & LOCALIZE_HIDDEN || 360 ecp->flags & DISCARD_LOCAL || 361 ecp->flags & DISCARD_LLABEL || 362 ecp->prefix_sym != NULL || 363 !STAILQ_EMPTY(&ecp->v_symop)) 364 ecp->flags &= ~SYMTAB_INTACT; 365 366 /* 367 * Create symbol table. Symbols are filtered or stripped according to 368 * command line args specified by user, and later updated for the new 369 * layout of sections in the output object. 370 */ 371 if ((ecp->flags & SYMTAB_EXIST) != 0) 372 create_symtab(ecp); 373 374 /* 375 * Write the underlying ehdr. Note that it should be called 376 * before elf_setshstrndx() since it will overwrite e->e_shstrndx. 377 */ 378 if (gelf_update_ehdr(ecp->eout, &oeh) == 0) 379 errx(EXIT_FAILURE, "gelf_update_ehdr() failed: %s", 380 elf_errmsg(-1)); 381 382 /* 383 * First processing of output sections: at this stage we copy the 384 * content of each section from input to output object. Section 385 * content will be modified and printed (mcs) if need. Also content of 386 * relocation section probably will be filtered and updated according 387 * to symbol table changes. 388 */ 389 copy_content(ecp); 390 391 /* 392 * Second processing of output sections: Update section headers. 393 * At this stage we set name string index, update st_link and st_info 394 * for output sections. 395 */ 396 update_shdr(ecp, 1); 397 398 /* Renew oeh to get the updated e_shstrndx. */ 399 if (gelf_getehdr(ecp->eout, &oeh) == NULL) 400 errx(EXIT_FAILURE, "gelf_getehdr() failed: %s", 401 elf_errmsg(-1)); 402 403 /* 404 * Insert SHDR table into the internal section list as a "pseudo" 405 * section, so later it will get sorted and resynced just as "normal" 406 * sections. 407 * 408 * Under FreeBSD, Binutils objcopy always put the section header 409 * at the end of all the sections. We want to do the same here. 410 * 411 * However, note that the behaviour is still different with Binutils: 412 * elfcopy checks the FreeBSD OSABI tag to tell whether it needs to 413 * move the section headers, while Binutils is probably configured 414 * this way when it's compiled on FreeBSD. 415 */ 416 if (oeh.e_ident[EI_OSABI] == ELFOSABI_FREEBSD) 417 shtab = insert_shtab(ecp, 1); 418 else 419 shtab = insert_shtab(ecp, 0); 420 421 /* 422 * Resync section offsets in the output object. This is needed 423 * because probably sections are modified or new sections are added, 424 * as a result overlap/gap might appears. 425 */ 426 resync_sections(ecp); 427 428 /* Store SHDR offset in EHDR. */ 429 oeh.e_shoff = shtab->off; 430 431 /* Put program header table immediately after the Elf header. */ 432 if (ecp->ophnum > 0) { 433 oeh.e_phoff = gelf_fsize(ecp->eout, ELF_T_EHDR, 1, EV_CURRENT); 434 if (oeh.e_phoff == 0) 435 errx(EXIT_FAILURE, "gelf_fsize() failed: %s", 436 elf_errmsg(-1)); 437 } 438 439 /* 440 * Update ELF object entry point if requested. 441 */ 442 if (ecp->change_addr != 0) 443 oeh.e_entry += ecp->change_addr; 444 if (ecp->flags & SET_START) 445 oeh.e_entry = ecp->set_start; 446 if (ecp->change_start != 0) 447 oeh.e_entry += ecp->change_start; 448 449 /* 450 * Update ehdr again before we call elf_update(), since we 451 * modified e_shoff and e_phoff. 452 */ 453 if (gelf_update_ehdr(ecp->eout, &oeh) == 0) 454 errx(EXIT_FAILURE, "gelf_update_ehdr() failed: %s", 455 elf_errmsg(-1)); 456 457 if (ecp->ophnum > 0) 458 copy_phdr(ecp); 459 460 /* Write out the output elf object. */ 461 if (elf_update(ecp->eout, ELF_C_WRITE) < 0) 462 errx(EXIT_FAILURE, "elf_update() failed: %s", 463 elf_errmsg(-1)); 464 465 /* Release allocated resource. */ 466 free_elf(ecp); 467} 468 469void 470free_elf(struct elfcopy *ecp) 471{ 472 struct segment *seg, *seg_temp; 473 struct section *sec, *sec_temp; 474 475 /* Free internal segment list. */ 476 if (!STAILQ_EMPTY(&ecp->v_seg)) { 477 STAILQ_FOREACH_SAFE(seg, &ecp->v_seg, seg_list, seg_temp) { 478 STAILQ_REMOVE(&ecp->v_seg, seg, segment, seg_list); 479 free(seg); 480 } 481 } 482 483 /* Free symbol table buffers. */ 484 free_symtab(ecp); 485 486 /* Free section name string table. */ 487 elftc_string_table_destroy(ecp->shstrtab->strtab); 488 489 /* Free internal section list. */ 490 if (!TAILQ_EMPTY(&ecp->v_sec)) { 491 TAILQ_FOREACH_SAFE(sec, &ecp->v_sec, sec_list, sec_temp) { 492 TAILQ_REMOVE(&ecp->v_sec, sec, sec_list); 493 if (sec->buf != NULL) 494 free(sec->buf); 495 if (sec->newname != NULL) 496 free(sec->newname); 497 if (sec->pad != NULL) 498 free(sec->pad); 499 free(sec); 500 } 501 } 502 503 ecp->symtab = NULL; 504 ecp->strtab = NULL; 505 ecp->shstrtab = NULL; 506 507 if (ecp->secndx != NULL) { 508 free(ecp->secndx); 509 ecp->secndx = NULL; 510 } 511} 512 513/* Create a temporary file. */ 514void 515create_tempfile(const char *src, char **fn, int *fd) 516{ 517 static const char _TEMPDIR[] = "/tmp/"; 518 static const char _TEMPFILE[] = "ecp.XXXXXXXX"; 519 const char *tmpdir; 520 char *tmpf; 521 size_t tlen, slen, plen; 522 523 if (fn == NULL || fd == NULL) 524 return; 525 for (;;) { 526 if (src == NULL) { 527 /* Respect TMPDIR environment variable. */ 528 tmpdir = getenv("TMPDIR"); 529 if (tmpdir == NULL || *tmpdir == '\0') 530 tmpdir = _TEMPDIR; 531 tlen = strlen(tmpdir); 532 slen = tmpdir[tlen - 1] == '/' ? 0 : 1; 533 } else { 534 /* Create temporary file relative to source file. */ 535 if ((tmpdir = strrchr(src, '/')) == NULL) { 536 /* No path, only use a template filename. */ 537 tlen = 0; 538 } else { 539 /* Append the template after the slash. */ 540 tlen = ++tmpdir - src; 541 tmpdir = src; 542 } 543 slen = 0; 544 } 545 plen = strlen(_TEMPFILE) + 1; 546 tmpf = malloc(tlen + slen + plen); 547 if (tmpf == NULL) 548 err(EXIT_FAILURE, "malloc failed"); 549 if (tlen > 0) 550 memcpy(tmpf, tmpdir, tlen); 551 if (slen > 0) 552 tmpf[tlen] = '/'; 553 /* Copy template filename including NUL terminator. */ 554 memcpy(tmpf + tlen + slen, _TEMPFILE, plen); 555 if ((*fd = mkstemp(tmpf)) != -1) 556 break; 557 if (errno != EACCES || src == NULL) 558 err(EXIT_FAILURE, "mkstemp %s failed", tmpf); 559 /* Permission denied, try again using TMPDIR or /tmp. */ 560 free(tmpf); 561 src = NULL; 562 } 563 if (fchmod(*fd, 0644) == -1) 564 err(EXIT_FAILURE, "fchmod %s failed", tmpf); 565 *fn = tmpf; 566} 567 568/* 569 * Copy temporary file with path src and file descriptor infd to path dst. 570 * If in_place is set act as if editing the file in place, avoiding rename() 571 * to preserve hard and symbolic links. Output file remains open, with file 572 * descriptor returned in outfd. 573 */ 574static int 575copy_from_tempfile(const char *src, const char *dst, int infd, int *outfd, 576 int in_place) 577{ 578 int tmpfd; 579 580 /* 581 * First, check if we can use rename(). 582 */ 583 if (in_place == 0) { 584 if (rename(src, dst) >= 0) { 585 *outfd = infd; 586 return (0); 587 } else if (errno != EXDEV && errno != EACCES) 588 return (-1); 589 590 /* 591 * If the rename() failed due to 'src' and 'dst' residing in 592 * two different file systems, invoke a helper function in 593 * libelftc to do the copy. 594 */ 595 596 if (errno != EACCES && unlink(dst) < 0) 597 return (-1); 598 } 599 600 if ((tmpfd = open(dst, O_CREAT | O_TRUNC | O_WRONLY, 0755)) < 0) 601 return (-1); 602 603 if (elftc_copyfile(infd, tmpfd) < 0) { 604 (void) close(tmpfd); 605 return (-1); 606 } 607 608 /* 609 * Remove the temporary file from the file system 610 * namespace, and close its file descriptor. 611 */ 612 if (unlink(src) < 0) { 613 (void) close(tmpfd); 614 return (-1); 615 } 616 617 (void) close(infd); 618 619 /* 620 * Return the file descriptor for the destination. 621 */ 622 *outfd = tmpfd; 623 624 return (0); 625} 626 627static void 628create_file(struct elfcopy *ecp, const char *src, const char *dst) 629{ 630 struct stat sb; 631 char *tempfile, *elftemp; 632 int efd, ifd, ofd, ofd0, tfd; 633 int in_place; 634 635 tempfile = NULL; 636 637 if (src == NULL) 638 errx(EXIT_FAILURE, "internal: src == NULL"); 639 if ((ifd = open(src, O_RDONLY)) == -1) 640 err(EXIT_FAILURE, "open %s failed", src); 641 642 if (fstat(ifd, &sb) == -1) 643 err(EXIT_FAILURE, "fstat %s failed", src); 644 645 if (dst == NULL) 646 create_tempfile(src, &tempfile, &ofd); 647 else 648 if ((ofd = open(dst, O_RDWR|O_CREAT, 0755)) == -1) 649 err(EXIT_FAILURE, "open %s failed", dst); 650 651#ifndef LIBELF_AR 652 /* Detect and process ar(1) archive using libarchive. */ 653 if (ac_detect_ar(ifd)) { 654 ac_create_ar(ecp, ifd, ofd); 655 goto copy_done; 656 } 657#endif 658 659 if (lseek(ifd, 0, SEEK_SET) < 0) 660 err(EXIT_FAILURE, "lseek failed"); 661 662 /* 663 * If input object is not ELF file, convert it to an intermediate 664 * ELF object before processing. 665 */ 666 if (ecp->itf != ETF_ELF) { 667 /* 668 * If the output object is not an ELF file, choose an arbitrary 669 * ELF format for the intermediate file. srec, ihex and binary 670 * formats are independent of class, endianness and machine 671 * type so these choices do not affect the output. 672 */ 673 if (ecp->otf != ETF_ELF) { 674 if (ecp->oec == ELFCLASSNONE) 675 ecp->oec = ELFCLASS64; 676 if (ecp->oed == ELFDATANONE) 677 ecp->oed = ELFDATA2LSB; 678 } 679 create_tempfile(src, &elftemp, &efd); 680 if ((ecp->eout = elf_begin(efd, ELF_C_WRITE, NULL)) == NULL) 681 errx(EXIT_FAILURE, "elf_begin() failed: %s", 682 elf_errmsg(-1)); 683 elf_flagelf(ecp->eout, ELF_C_SET, ELF_F_LAYOUT); 684 if (ecp->itf == ETF_BINARY) 685 create_elf_from_binary(ecp, ifd, src); 686 else if (ecp->itf == ETF_IHEX) 687 create_elf_from_ihex(ecp, ifd); 688 else if (ecp->itf == ETF_SREC) 689 create_elf_from_srec(ecp, ifd); 690 else 691 errx(EXIT_FAILURE, "Internal: invalid target flavour"); 692 elf_end(ecp->eout); 693 694 /* Open intermediate ELF object as new input object. */ 695 close(ifd); 696 if ((ifd = open(elftemp, O_RDONLY)) == -1) 697 err(EXIT_FAILURE, "open %s failed", src); 698 close(efd); 699 if (unlink(elftemp) < 0) 700 err(EXIT_FAILURE, "unlink %s failed", elftemp); 701 free(elftemp); 702 } 703 704 if ((ecp->ein = elf_begin(ifd, ELF_C_READ, NULL)) == NULL) 705 errx(EXIT_FAILURE, "elf_begin() failed: %s", 706 elf_errmsg(-1)); 707 708 switch (elf_kind(ecp->ein)) { 709 case ELF_K_NONE: 710 errx(EXIT_FAILURE, "file format not recognized"); 711 case ELF_K_ELF: 712 if ((ecp->eout = elf_begin(ofd, ELF_C_WRITE, NULL)) == NULL) 713 errx(EXIT_FAILURE, "elf_begin() failed: %s", 714 elf_errmsg(-1)); 715 716 /* elfcopy(1) manage ELF layout by itself. */ 717 elf_flagelf(ecp->eout, ELF_C_SET, ELF_F_LAYOUT); 718 719 /* 720 * Create output ELF object. 721 */ 722 create_elf(ecp); 723 elf_end(ecp->eout); 724 725 /* 726 * Convert the output ELF object to binary/srec/ihex if need. 727 */ 728 if (ecp->otf != ETF_ELF) { 729 /* 730 * Create (another) tempfile for binary/srec/ihex 731 * output object. 732 */ 733 if (tempfile != NULL) { 734 if (unlink(tempfile) < 0) 735 err(EXIT_FAILURE, "unlink %s failed", 736 tempfile); 737 free(tempfile); 738 } 739 create_tempfile(src, &tempfile, &ofd0); 740 741 742 /* 743 * Rewind the file descriptor being processed. 744 */ 745 if (lseek(ofd, 0, SEEK_SET) < 0) 746 err(EXIT_FAILURE, 747 "lseek failed for the output object"); 748 749 /* 750 * Call flavour-specific conversion routine. 751 */ 752 switch (ecp->otf) { 753 case ETF_BINARY: 754 create_binary(ofd, ofd0); 755 break; 756 case ETF_IHEX: 757 create_ihex(ofd, ofd0); 758 break; 759 case ETF_SREC: 760 create_srec(ecp, ofd, ofd0, 761 dst != NULL ? dst : src); 762 break; 763 case ETF_PE: 764 case ETF_EFI: 765#if WITH_PE 766 create_pe(ecp, ofd, ofd0); 767#else 768 errx(EXIT_FAILURE, "PE/EFI support not enabled" 769 " at compile time"); 770#endif 771 break; 772 default: 773 errx(EXIT_FAILURE, "Internal: unsupported" 774 " output flavour %d", ecp->oec); 775 } 776 777 close(ofd); 778 ofd = ofd0; 779 } 780 781 break; 782 783 case ELF_K_AR: 784 /* XXX: Not yet supported. */ 785 break; 786 default: 787 errx(EXIT_FAILURE, "file format not supported"); 788 } 789 790 elf_end(ecp->ein); 791 792#ifndef LIBELF_AR 793copy_done: 794#endif 795 796 if (tempfile != NULL) { 797 in_place = 0; 798 if (dst == NULL) { 799 dst = src; 800 if (lstat(dst, &sb) != -1 && 801 (sb.st_nlink > 1 || S_ISLNK(sb.st_mode))) 802 in_place = 1; 803 } 804 805 if (copy_from_tempfile(tempfile, dst, ofd, &tfd, in_place) < 0) 806 err(EXIT_FAILURE, "creation of %s failed", dst); 807 808 free(tempfile); 809 tempfile = NULL; 810 811 ofd = tfd; 812 } 813 814 if (strcmp(dst, "/dev/null") && fchmod(ofd, sb.st_mode) == -1) 815 err(EXIT_FAILURE, "fchmod %s failed", dst); 816 817 if ((ecp->flags & PRESERVE_DATE) && 818 elftc_set_timestamps(dst, &sb) < 0) 819 err(EXIT_FAILURE, "setting timestamps failed"); 820 821 close(ifd); 822 close(ofd); 823} 824 825static void 826elfcopy_main(struct elfcopy *ecp, int argc, char **argv) 827{ 828 struct sec_action *sac; 829 const char *infile, *outfile; 830 char *fn, *s; 831 int opt; 832 833 while ((opt = getopt_long(argc, argv, "dB:gG:I:j:K:L:N:O:pR:s:SwW:xXV", 834 elfcopy_longopts, NULL)) != -1) { 835 switch(opt) { 836 case 'B': 837 /* ignored */ 838 break; 839 case 'R': 840 sac = lookup_sec_act(ecp, optarg, 1); 841 if (sac->copy != 0) 842 errx(EXIT_FAILURE, 843 "both copy and remove specified"); 844 sac->remove = 1; 845 ecp->flags |= SEC_REMOVE; 846 break; 847 case 'S': 848 ecp->strip = STRIP_ALL; 849 break; 850 case 'g': 851 ecp->strip = STRIP_DEBUG; 852 break; 853 case 'G': 854 ecp->flags |= KEEP_GLOBAL; 855 add_to_symop_list(ecp, optarg, NULL, SYMOP_KEEPG); 856 break; 857 case 'I': 858 case 's': 859 set_input_target(ecp, optarg); 860 break; 861 case 'j': 862 sac = lookup_sec_act(ecp, optarg, 1); 863 if (sac->remove != 0) 864 errx(EXIT_FAILURE, 865 "both copy and remove specified"); 866 sac->copy = 1; 867 ecp->flags |= SEC_COPY; 868 break; 869 case 'K': 870 add_to_symop_list(ecp, optarg, NULL, SYMOP_KEEP); 871 break; 872 case 'L': 873 add_to_symop_list(ecp, optarg, NULL, SYMOP_LOCALIZE); 874 break; 875 case 'N': 876 add_to_symop_list(ecp, optarg, NULL, SYMOP_STRIP); 877 break; 878 case 'O': 879 set_output_target(ecp, optarg); 880 break; 881 case 'p': 882 ecp->flags |= PRESERVE_DATE; 883 break; 884 case 'V': 885 print_version(); 886 break; 887 case 'w': 888 ecp->flags |= WILDCARD; 889 break; 890 case 'W': 891 add_to_symop_list(ecp, optarg, NULL, SYMOP_WEAKEN); 892 break; 893 case 'x': 894 ecp->flags |= DISCARD_LOCAL; 895 break; 896 case 'X': 897 ecp->flags |= DISCARD_LLABEL; 898 break; 899 case ECP_ADD_GNU_DEBUGLINK: 900 ecp->debuglink = optarg; 901 break; 902 case ECP_ADD_SECTION: 903 add_section(ecp, optarg); 904 break; 905 case ECP_CHANGE_ADDR: 906 ecp->change_addr = (int64_t) strtoll(optarg, NULL, 0); 907 break; 908 case ECP_CHANGE_SEC_ADDR: 909 parse_sec_address_op(ecp, opt, "--change-section-addr", 910 optarg); 911 break; 912 case ECP_CHANGE_SEC_LMA: 913 parse_sec_address_op(ecp, opt, "--change-section-lma", 914 optarg); 915 break; 916 case ECP_CHANGE_SEC_VMA: 917 parse_sec_address_op(ecp, opt, "--change-section-vma", 918 optarg); 919 break; 920 case ECP_CHANGE_START: 921 ecp->change_start = (int64_t) strtoll(optarg, NULL, 0); 922 break; 923 case ECP_CHANGE_WARN: 924 /* default */ 925 break; 926 case ECP_GAP_FILL: 927 ecp->fill = (uint8_t) strtoul(optarg, NULL, 0); 928 ecp->flags |= GAP_FILL; 929 break; 930 case ECP_GLOBALIZE_SYMBOL: 931 add_to_symop_list(ecp, optarg, NULL, SYMOP_GLOBALIZE); 932 break; 933 case ECP_GLOBALIZE_SYMBOLS: 934 parse_symlist_file(ecp, optarg, SYMOP_GLOBALIZE); 935 break; 936 case ECP_KEEP_SYMBOLS: 937 parse_symlist_file(ecp, optarg, SYMOP_KEEP); 938 break; 939 case ECP_KEEP_GLOBAL_SYMBOLS: 940 parse_symlist_file(ecp, optarg, SYMOP_KEEPG); 941 break; 942 case ECP_LOCALIZE_HIDDEN: 943 ecp->flags |= LOCALIZE_HIDDEN; 944 break; 945 case ECP_LOCALIZE_SYMBOLS: 946 parse_symlist_file(ecp, optarg, SYMOP_LOCALIZE); 947 break; 948 case ECP_NO_CHANGE_WARN: 949 ecp->flags |= NO_CHANGE_WARN; 950 break; 951 case ECP_ONLY_DEBUG: 952 ecp->strip = STRIP_NONDEBUG; 953 break; 954 case ECP_ONLY_DWO: 955 ecp->strip = STRIP_NONDWO; 956 break; 957 case ECP_PAD_TO: 958 ecp->pad_to = (uint64_t) strtoull(optarg, NULL, 0); 959 break; 960 case ECP_PREFIX_ALLOC: 961 ecp->prefix_alloc = optarg; 962 break; 963 case ECP_PREFIX_SEC: 964 ecp->prefix_sec = optarg; 965 break; 966 case ECP_PREFIX_SYM: 967 ecp->prefix_sym = optarg; 968 break; 969 case ECP_REDEF_SYMBOL: 970 if ((s = strchr(optarg, '=')) == NULL) 971 errx(EXIT_FAILURE, 972 "illegal format for --redefine-sym"); 973 *s++ = '\0'; 974 add_to_symop_list(ecp, optarg, s, SYMOP_REDEF); 975 break; 976 case ECP_REDEF_SYMBOLS: 977 parse_symlist_file(ecp, optarg, SYMOP_REDEF); 978 break; 979 case ECP_RENAME_SECTION: 980 if ((fn = strchr(optarg, '=')) == NULL) 981 errx(EXIT_FAILURE, 982 "illegal format for --rename-section"); 983 *fn++ = '\0'; 984 985 /* Check for optional flags. */ 986 if ((s = strchr(fn, ',')) != NULL) 987 *s++ = '\0'; 988 989 sac = lookup_sec_act(ecp, optarg, 1); 990 sac->rename = 1; 991 sac->newname = fn; 992 if (s != NULL) 993 parse_sec_flags(sac, s); 994 break; 995 case ECP_SET_OSABI: 996 set_osabi(ecp, optarg); 997 break; 998 case ECP_SET_SEC_FLAGS: 999 if ((s = strchr(optarg, '=')) == NULL) 1000 errx(EXIT_FAILURE, 1001 "illegal format for --set-section-flags"); 1002 *s++ = '\0'; 1003 sac = lookup_sec_act(ecp, optarg, 1); 1004 parse_sec_flags(sac, s); 1005 break; 1006 case ECP_SET_START: 1007 ecp->flags |= SET_START; 1008 ecp->set_start = (uint64_t) strtoull(optarg, NULL, 0); 1009 break; 1010 case ECP_SREC_FORCE_S3: 1011 ecp->flags |= SREC_FORCE_S3; 1012 break; 1013 case ECP_SREC_LEN: 1014 ecp->flags |= SREC_FORCE_LEN; 1015 ecp->srec_len = strtoul(optarg, NULL, 0); 1016 break; 1017 case ECP_STRIP_DWO: 1018 ecp->strip = STRIP_DWO; 1019 break; 1020 case ECP_STRIP_SYMBOLS: 1021 parse_symlist_file(ecp, optarg, SYMOP_STRIP); 1022 break; 1023 case ECP_STRIP_UNNEEDED: 1024 ecp->strip = STRIP_UNNEEDED; 1025 break; 1026 case ECP_WEAKEN_ALL: 1027 ecp->flags |= WEAKEN_ALL; 1028 break; 1029 case ECP_WEAKEN_SYMBOLS: 1030 parse_symlist_file(ecp, optarg, SYMOP_WEAKEN); 1031 break; 1032 default: 1033 elfcopy_usage(); 1034 } 1035 } 1036 1037 argc -= optind; 1038 argv += optind; 1039 1040 if (argc == 0 || argc > 2) 1041 elfcopy_usage(); 1042 1043 infile = argv[0]; 1044 outfile = NULL; 1045 if (argc > 1) 1046 outfile = argv[1]; 1047 1048 create_file(ecp, infile, outfile); 1049} 1050 1051static void 1052mcs_main(struct elfcopy *ecp, int argc, char **argv) 1053{ 1054 struct sec_action *sac; 1055 const char *string; 1056 int append, delete, compress, name, print; 1057 int opt, i; 1058 1059 append = delete = compress = name = print = 0; 1060 string = NULL; 1061 while ((opt = getopt_long(argc, argv, "a:cdhn:pV", mcs_longopts, 1062 NULL)) != -1) { 1063 switch(opt) { 1064 case 'a': 1065 append = 1; 1066 string = optarg; /* XXX multiple -a not supported */ 1067 break; 1068 case 'c': 1069 compress = 1; 1070 break; 1071 case 'd': 1072 delete = 1; 1073 break; 1074 case 'n': 1075 name = 1; 1076 (void)lookup_sec_act(ecp, optarg, 1); 1077 break; 1078 case 'p': 1079 print = 1; 1080 break; 1081 case 'V': 1082 print_version(); 1083 break; 1084 case 'h': 1085 default: 1086 mcs_usage(); 1087 } 1088 } 1089 1090 argc -= optind; 1091 argv += optind; 1092 1093 if (argc == 0) 1094 mcs_usage(); 1095 1096 /* Must specify one operation at least. */ 1097 if (!append && !compress && !delete && !print) 1098 mcs_usage(); 1099 1100 /* 1101 * If we are going to delete, ignore other operations. This is 1102 * different from the Solaris implementation, which can print 1103 * and delete a section at the same time, for example. Also, this 1104 * implementation do not respect the order between operations that 1105 * user specified, i.e., "mcs -pc a.out" equals to "mcs -cp a.out". 1106 */ 1107 if (delete) { 1108 append = compress = print = 0; 1109 ecp->flags |= SEC_REMOVE; 1110 } 1111 if (append) 1112 ecp->flags |= SEC_APPEND; 1113 if (compress) 1114 ecp->flags |= SEC_COMPRESS; 1115 if (print) 1116 ecp->flags |= SEC_PRINT; 1117 1118 /* .comment is the default section to operate on. */ 1119 if (!name) 1120 (void)lookup_sec_act(ecp, ".comment", 1); 1121 1122 STAILQ_FOREACH(sac, &ecp->v_sac, sac_list) { 1123 sac->append = append; 1124 sac->compress = compress; 1125 sac->print = print; 1126 sac->remove = delete; 1127 sac->string = string; 1128 } 1129 1130 for (i = 0; i < argc; i++) { 1131 /* If only -p is specified, output to /dev/null */ 1132 if (print && !append && !compress && !delete) 1133 create_file(ecp, argv[i], "/dev/null"); 1134 else 1135 create_file(ecp, argv[i], NULL); 1136 } 1137} 1138 1139static void 1140strip_main(struct elfcopy *ecp, int argc, char **argv) 1141{ 1142 struct sec_action *sac; 1143 const char *outfile; 1144 int opt; 1145 int i; 1146 1147 outfile = NULL; 1148 while ((opt = getopt_long(argc, argv, "hI:K:N:o:O:pR:sSdgVxXw", 1149 strip_longopts, NULL)) != -1) { 1150 switch(opt) { 1151 case 'R': 1152 sac = lookup_sec_act(ecp, optarg, 1); 1153 sac->remove = 1; 1154 ecp->flags |= SEC_REMOVE; 1155 break; 1156 case 's': 1157 ecp->strip = STRIP_ALL; 1158 break; 1159 case 'S': 1160 case 'g': 1161 case 'd': 1162 ecp->strip = STRIP_DEBUG; 1163 break; 1164 case 'I': 1165 /* ignored */ 1166 break; 1167 case 'K': 1168 add_to_symop_list(ecp, optarg, NULL, SYMOP_KEEP); 1169 break; 1170 case 'N': 1171 add_to_symop_list(ecp, optarg, NULL, SYMOP_STRIP); 1172 break; 1173 case 'o': 1174 outfile = optarg; 1175 break; 1176 case 'O': 1177 set_output_target(ecp, optarg); 1178 break; 1179 case 'p': 1180 ecp->flags |= PRESERVE_DATE; 1181 break; 1182 case 'V': 1183 print_version(); 1184 break; 1185 case 'w': 1186 ecp->flags |= WILDCARD; 1187 break; 1188 case 'x': 1189 ecp->flags |= DISCARD_LOCAL; 1190 break; 1191 case 'X': 1192 ecp->flags |= DISCARD_LLABEL; 1193 break; 1194 case ECP_ONLY_DEBUG: 1195 ecp->strip = STRIP_NONDEBUG; 1196 break; 1197 case ECP_STRIP_UNNEEDED: 1198 ecp->strip = STRIP_UNNEEDED; 1199 break; 1200 case 'h': 1201 default: 1202 strip_usage(); 1203 } 1204 } 1205 1206 argc -= optind; 1207 argv += optind; 1208 1209 if (ecp->strip == 0 && 1210 ((ecp->flags & DISCARD_LOCAL) == 0) && 1211 ((ecp->flags & DISCARD_LLABEL) == 0) && 1212 lookup_symop_list(ecp, NULL, SYMOP_STRIP) == NULL) 1213 ecp->strip = STRIP_ALL; 1214 if (argc == 0) 1215 strip_usage(); 1216 /* 1217 * Only accept a single input file if an output file had been 1218 * specified. 1219 */ 1220 if (outfile != NULL && argc != 1) 1221 strip_usage(); 1222 1223 for (i = 0; i < argc; i++) 1224 create_file(ecp, argv[i], outfile); 1225} 1226 1227static void 1228parse_sec_flags(struct sec_action *sac, char *s) 1229{ 1230 const char *flag; 1231 int found, i; 1232 1233 for (flag = strtok(s, ","); flag; flag = strtok(NULL, ",")) { 1234 found = 0; 1235 for (i = 0; sec_flags[i].name != NULL; i++) 1236 if (strcasecmp(sec_flags[i].name, flag) == 0) { 1237 sac->flags |= sec_flags[i].value; 1238 found = 1; 1239 break; 1240 } 1241 if (!found) 1242 errx(EXIT_FAILURE, "unrecognized section flag %s", 1243 flag); 1244 } 1245} 1246 1247static void 1248parse_sec_address_op(struct elfcopy *ecp, int optnum, const char *optname, 1249 char *s) 1250{ 1251 struct sec_action *sac; 1252 const char *name; 1253 char *v; 1254 char op; 1255 1256 name = v = s; 1257 do { 1258 v++; 1259 } while (*v != '\0' && *v != '=' && *v != '+' && *v != '-'); 1260 if (*v == '\0' || *(v + 1) == '\0') 1261 errx(EXIT_FAILURE, "invalid format for %s", optname); 1262 op = *v; 1263 *v++ = '\0'; 1264 sac = lookup_sec_act(ecp, name, 1); 1265 switch (op) { 1266 case '=': 1267 if (optnum == ECP_CHANGE_SEC_LMA || 1268 optnum == ECP_CHANGE_SEC_ADDR) { 1269 sac->setlma = 1; 1270 sac->lma = (uint64_t) strtoull(v, NULL, 0); 1271 } 1272 if (optnum == ECP_CHANGE_SEC_VMA || 1273 optnum == ECP_CHANGE_SEC_ADDR) { 1274 sac->setvma = 1; 1275 sac->vma = (uint64_t) strtoull(v, NULL, 0); 1276 } 1277 break; 1278 case '+': 1279 if (optnum == ECP_CHANGE_SEC_LMA || 1280 optnum == ECP_CHANGE_SEC_ADDR) 1281 sac->lma_adjust = (int64_t) strtoll(v, NULL, 0); 1282 if (optnum == ECP_CHANGE_SEC_VMA || 1283 optnum == ECP_CHANGE_SEC_ADDR) 1284 sac->vma_adjust = (int64_t) strtoll(v, NULL, 0); 1285 break; 1286 case '-': 1287 if (optnum == ECP_CHANGE_SEC_LMA || 1288 optnum == ECP_CHANGE_SEC_ADDR) 1289 sac->lma_adjust = (int64_t) -strtoll(v, NULL, 0); 1290 if (optnum == ECP_CHANGE_SEC_VMA || 1291 optnum == ECP_CHANGE_SEC_ADDR) 1292 sac->vma_adjust = (int64_t) -strtoll(v, NULL, 0); 1293 break; 1294 default: 1295 break; 1296 } 1297} 1298 1299static void 1300parse_symlist_file(struct elfcopy *ecp, const char *fn, unsigned int op) 1301{ 1302 struct symfile *sf; 1303 struct stat sb; 1304 FILE *fp; 1305 char *data, *p, *line, *end, *e, *n; 1306 1307 if (stat(fn, &sb) == -1) 1308 err(EXIT_FAILURE, "stat %s failed", fn); 1309 1310 /* Check if we already read and processed this file. */ 1311 STAILQ_FOREACH(sf, &ecp->v_symfile, symfile_list) { 1312 if (sf->dev == sb.st_dev && sf->ino == sb.st_ino) 1313 goto process_symfile; 1314 } 1315 1316 if ((fp = fopen(fn, "r")) == NULL) 1317 err(EXIT_FAILURE, "can not open %s", fn); 1318 if ((data = malloc(sb.st_size + 1)) == NULL) 1319 err(EXIT_FAILURE, "malloc failed"); 1320 if (sb.st_size > 0) 1321 if (fread(data, sb.st_size, 1, fp) != 1) 1322 err(EXIT_FAILURE, "fread failed"); 1323 fclose(fp); 1324 data[sb.st_size] = '\0'; 1325 1326 if ((sf = calloc(1, sizeof(*sf))) == NULL) 1327 err(EXIT_FAILURE, "malloc failed"); 1328 sf->dev = sb.st_dev; 1329 sf->ino = sb.st_ino; 1330 sf->size = sb.st_size + 1; 1331 sf->data = data; 1332 1333process_symfile: 1334 1335 /* 1336 * Basically what we do here is to convert EOL to '\0', and remove 1337 * leading and trailing whitespaces for each line. 1338 */ 1339 1340 end = sf->data + sf->size; 1341 line = NULL; 1342 for(p = sf->data; p < end; p++) { 1343 if ((*p == '\t' || *p == ' ') && line == NULL) 1344 continue; 1345 if (*p == '\r' || *p == '\n' || *p == '\0') { 1346 *p = '\0'; 1347 if (line == NULL) 1348 continue; 1349 1350 /* Skip comment. */ 1351 if (*line == '#') { 1352 line = NULL; 1353 continue; 1354 } 1355 1356 e = p - 1; 1357 while(e != line && (*e == '\t' || *e == ' ')) 1358 *e-- = '\0'; 1359 if (op != SYMOP_REDEF) 1360 add_to_symop_list(ecp, line, NULL, op); 1361 else { 1362 if (strlen(line) < 3) 1363 errx(EXIT_FAILURE, 1364 "illegal format for" 1365 " --redefine-sym"); 1366 for(n = line + 1; n < e; n++) { 1367 if (*n == ' ' || *n == '\t') { 1368 while(*n == ' ' || *n == '\t') 1369 *n++ = '\0'; 1370 break; 1371 } 1372 } 1373 if (n >= e) 1374 errx(EXIT_FAILURE, 1375 "illegal format for" 1376 " --redefine-sym"); 1377 add_to_symop_list(ecp, line, n, op); 1378 } 1379 line = NULL; 1380 continue; 1381 } 1382 1383 if (line == NULL) 1384 line = p; 1385 } 1386} 1387 1388static void 1389set_input_target(struct elfcopy *ecp, const char *target_name) 1390{ 1391 Elftc_Bfd_Target *tgt; 1392 1393 if ((tgt = elftc_bfd_find_target(target_name)) == NULL) 1394 errx(EXIT_FAILURE, "%s: invalid target name", target_name); 1395 ecp->itf = elftc_bfd_target_flavor(tgt); 1396} 1397 1398static void 1399set_output_target(struct elfcopy *ecp, const char *target_name) 1400{ 1401 Elftc_Bfd_Target *tgt; 1402 1403 if ((tgt = elftc_bfd_find_target(target_name)) == NULL) 1404 errx(EXIT_FAILURE, "%s: invalid target name", target_name); 1405 ecp->otf = elftc_bfd_target_flavor(tgt); 1406 if (ecp->otf == ETF_ELF) { 1407 ecp->oec = elftc_bfd_target_class(tgt); 1408 ecp->oed = elftc_bfd_target_byteorder(tgt); 1409 ecp->oem = elftc_bfd_target_machine(tgt); 1410 ecp->abi = elftc_bfd_target_osabi(tgt); 1411 } 1412 if (ecp->otf == ETF_EFI || ecp->otf == ETF_PE) 1413 ecp->oem = elftc_bfd_target_machine(tgt); 1414 1415 ecp->otgt = target_name; 1416} 1417 1418static void 1419set_osabi(struct elfcopy *ecp, const char *abi) 1420{ 1421 int i, found; 1422 1423 found = 0; 1424 for (i = 0; osabis[i].name != NULL; i++) 1425 if (strcasecmp(osabis[i].name, abi) == 0) { 1426 ecp->abi = osabis[i].abi; 1427 found = 1; 1428 break; 1429 } 1430 if (!found) 1431 errx(EXIT_FAILURE, "unrecognized OSABI %s", abi); 1432} 1433 1434#define ELFCOPY_USAGE_MESSAGE "\ 1435Usage: %s [options] infile [outfile]\n\ 1436 Transform object files.\n\n\ 1437 Options:\n\ 1438 -d | -g | --strip-debug Remove debugging information from the output.\n\ 1439 -j SECTION | --only-section=SECTION\n\ 1440 Copy only the named section to the output.\n\ 1441 -p | --preserve-dates Preserve access and modification times.\n\ 1442 -w | --wildcard Use shell-style patterns to name symbols.\n\ 1443 -x | --discard-all Do not copy non-globals to the output.\n\ 1444 -I FORMAT | --input-target=FORMAT\n\ 1445 Specify object format for the input file.\n\ 1446 -K SYM | --keep-symbol=SYM Copy symbol SYM to the output.\n\ 1447 -L SYM | --localize-symbol=SYM\n\ 1448 Make symbol SYM local to the output file.\n\ 1449 -N SYM | --strip-symbol=SYM Do not copy symbol SYM to the output.\n\ 1450 -O FORMAT | --output-target=FORMAT\n\ 1451 Specify object format for the output file.\n\ 1452 FORMAT should be a target name understood by\n\ 1453 elftc_bfd_find_target(3).\n\ 1454 -R NAME | --remove-section=NAME\n\ 1455 Remove the named section.\n\ 1456 -S | --strip-all Remove all symbol and relocation information\n\ 1457 from the output.\n\ 1458 -V | --version Print a version identifier and exit.\n\ 1459 -W SYM | --weaken-symbol=SYM Mark symbol SYM as weak in the output.\n\ 1460 -X | --discard-locals Do not copy compiler generated symbols to\n\ 1461 the output.\n\ 1462 --add-section NAME=FILE Add the contents of FILE to the ELF object as\n\ 1463 a new section named NAME.\n\ 1464 --adjust-section-vma SECTION{=,+,-}VAL | \\\n\ 1465 --change-section-address SECTION{=,+,-}VAL\n\ 1466 Set or adjust the VMA and the LMA of the\n\ 1467 named section by VAL.\n\ 1468 --adjust-start=INCR | --change-start=INCR\n\ 1469 Add INCR to the start address for the ELF\n\ 1470 object.\n\ 1471 --adjust-vma=INCR | --change-addresses=INCR\n\ 1472 Increase the VMA and LMA of all sections by\n\ 1473 INCR.\n\ 1474 --adjust-warning | --change-warnings\n\ 1475 Issue warnings for non-existent sections.\n\ 1476 --change-section-lma SECTION{=,+,-}VAL\n\ 1477 Set or adjust the LMA address of the named\n\ 1478 section by VAL.\n\ 1479 --change-section-vma SECTION{=,+,-}VAL\n\ 1480 Set or adjust the VMA address of the named\n\ 1481 section by VAL.\n\ 1482 --gap-fill=VAL Fill the gaps between sections with bytes\n\ 1483 of value VAL.\n\ 1484 --localize-hidden Make all hidden symbols local to the output\n\ 1485 file.\n\ 1486 --no-adjust-warning| --no-change-warnings\n\ 1487 Do not issue warnings for non-existent\n\ 1488 sections.\n\ 1489 --only-keep-debug Copy only debugging information.\n\ 1490 --output-target=FORMAT Use the specified format for the output.\n\ 1491 --pad-to=ADDRESS Pad the output object up to the given address.\n\ 1492 --prefix-alloc-sections=STRING\n\ 1493 Prefix the section names of all the allocated\n\ 1494 sections with STRING.\n\ 1495 --prefix-sections=STRING Prefix the section names of all the sections\n\ 1496 with STRING.\n\ 1497 --prefix-symbols=STRING Prefix the symbol names of all the symbols\n\ 1498 with STRING.\n\ 1499 --rename-section OLDNAME=NEWNAME[,FLAGS]\n\ 1500 Rename and optionally change section flags.\n\ 1501 --set-section-flags SECTION=FLAGS\n\ 1502 Set section flags for the named section.\n\ 1503 Supported flags are: 'alloc', 'code',\n\ 1504 'contents', 'data', 'debug', 'load',\n\ 1505 'noload', 'readonly', 'rom', and 'shared'.\n\ 1506 --set-start=ADDRESS Set the start address of the ELF object.\n\ 1507 --srec-forceS3 Only generate S3 S-Records.\n\ 1508 --srec-len=LEN Set the maximum length of a S-Record line.\n\ 1509 --strip-unneeded Do not copy relocation information.\n" 1510 1511static void 1512elfcopy_usage(void) 1513{ 1514 (void) fprintf(stderr, ELFCOPY_USAGE_MESSAGE, ELFTC_GETPROGNAME()); 1515 exit(EXIT_FAILURE); 1516} 1517 1518#define MCS_USAGE_MESSAGE "\ 1519Usage: %s [options] file...\n\ 1520 Manipulate the comment section in an ELF object.\n\n\ 1521 Options:\n\ 1522 -a STRING Append 'STRING' to the comment section.\n\ 1523 -c Remove duplicate entries from the comment section.\n\ 1524 -d Delete the comment section.\n\ 1525 -h | --help Print a help message and exit.\n\ 1526 -n NAME Operate on the ELF section with name 'NAME'.\n\ 1527 -p Print the contents of the comment section.\n\ 1528 -V | --version Print a version identifier and exit.\n" 1529 1530static void 1531mcs_usage(void) 1532{ 1533 (void) fprintf(stderr, MCS_USAGE_MESSAGE, ELFTC_GETPROGNAME()); 1534 exit(EXIT_FAILURE); 1535} 1536 1537#define STRIP_USAGE_MESSAGE "\ 1538Usage: %s [options] file...\n\ 1539 Discard information from ELF objects.\n\n\ 1540 Options:\n\ 1541 -d | -g | -S | --strip-debug Remove debugging symbols.\n\ 1542 -h | --help Print a help message.\n\ 1543 -o FILE | --output-file FILE Write output to FILE.\n\ 1544 --only-keep-debug Keep debugging information only.\n\ 1545 -p | --preserve-dates Preserve access and modification times.\n\ 1546 -s | --strip-all Remove all symbols.\n\ 1547 --strip-unneeded Remove symbols not needed for relocation\n\ 1548 processing.\n\ 1549 -w | --wildcard Use shell-style patterns to name symbols.\n\ 1550 -x | --discard-all Discard all non-global symbols.\n\ 1551 -I TGT| --input-target=TGT (Accepted, but ignored).\n\ 1552 -K SYM | --keep-symbol=SYM Keep symbol 'SYM' in the output.\n\ 1553 -N SYM | --strip-symbol=SYM Remove symbol 'SYM' from the output.\n\ 1554 -O TGT | --output-target=TGT Set the output file format to 'TGT'.\n\ 1555 -R SEC | --remove-section=SEC Remove the section named 'SEC'.\n\ 1556 -V | --version Print a version identifier and exit.\n\ 1557 -X | --discard-locals Remove compiler-generated local symbols.\n" 1558 1559static void 1560strip_usage(void) 1561{ 1562 (void) fprintf(stderr, STRIP_USAGE_MESSAGE, ELFTC_GETPROGNAME()); 1563 exit(EXIT_FAILURE); 1564} 1565 1566static void 1567print_version(void) 1568{ 1569 (void) printf("%s (%s)\n", ELFTC_GETPROGNAME(), elftc_version()); 1570 exit(EXIT_SUCCESS); 1571} 1572 1573/* 1574 * Compare the ending of s with end. 1575 */ 1576static int 1577strrcmp(const char *s, const char *end) 1578{ 1579 size_t endlen, slen; 1580 1581 slen = strlen(s); 1582 endlen = strlen(end); 1583 1584 if (slen >= endlen) 1585 s += slen - endlen; 1586 return (strcmp(s, end)); 1587} 1588 1589int 1590main(int argc, char **argv) 1591{ 1592 struct elfcopy *ecp; 1593 1594 if (elf_version(EV_CURRENT) == EV_NONE) 1595 errx(EXIT_FAILURE, "ELF library initialization failed: %s", 1596 elf_errmsg(-1)); 1597 1598 ecp = calloc(1, sizeof(*ecp)); 1599 if (ecp == NULL) 1600 err(EXIT_FAILURE, "calloc failed"); 1601 1602 ecp->itf = ecp->otf = ETF_ELF; 1603 ecp->iec = ecp->oec = ELFCLASSNONE; 1604 ecp->oed = ELFDATANONE; 1605 ecp->abi = -1; 1606 /* There is always an empty section. */ 1607 ecp->nos = 1; 1608 ecp->fill = 0; 1609 1610 STAILQ_INIT(&ecp->v_seg); 1611 STAILQ_INIT(&ecp->v_sac); 1612 STAILQ_INIT(&ecp->v_sadd); 1613 STAILQ_INIT(&ecp->v_symop); 1614 STAILQ_INIT(&ecp->v_symfile); 1615 STAILQ_INIT(&ecp->v_arobj); 1616 TAILQ_INIT(&ecp->v_sec); 1617 1618 if ((ecp->progname = ELFTC_GETPROGNAME()) == NULL) 1619 ecp->progname = "elfcopy"; 1620 1621 if (strrcmp(ecp->progname, "strip") == 0) 1622 strip_main(ecp, argc, argv); 1623 else if (strrcmp(ecp->progname, "mcs") == 0) 1624 mcs_main(ecp, argc, argv); 1625 else { 1626 if (strrcmp(ecp->progname, "elfcopy") != 0 && 1627 strrcmp(ecp->progname, "objcopy") != 0) 1628 warnx("program mode not known, defaulting to elfcopy"); 1629 elfcopy_main(ecp, argc, argv); 1630 } 1631 1632 free_sec_add(ecp); 1633 free_sec_act(ecp); 1634 free(ecp); 1635 1636 exit(EXIT_SUCCESS); 1637} 1638