contrib/elftoolchain/elfcopy/main.c

   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
  42 ELFTC_VCSID("$Id: main.c 3399 2016-02-12 18:07:56Z emaste $");
  43
  44 enum 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
  83 static struct option mcs_longopts[] =
  84 {
  85         { "help", no_argument, NULL, 'h' },
  86         { "version", no_argument, NULL, 'V' },
  87         { NULL, 0, NULL, 0 }
  88 };
  89
  90 static 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
 111 static 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
 176 static 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
 193 static 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         {"arm", ELFOSABI_ARM},
 213         {"standalone", ELFOSABI_STANDALONE},
 214         {NULL, 0}
 215 };
 216
 217 static int      copy_from_tempfile(const char *src, const char *dst,
 218     int infd, int *outfd, int in_place);
 219 static void     create_file(struct elfcopy *ecp, const char *src,
 220     const char *dst);
 221 static void     elfcopy_main(struct elfcopy *ecp, int argc, char **argv);
 222 static void     elfcopy_usage(void);
 223 static void     mcs_main(struct elfcopy *ecp, int argc, char **argv);
 224 static void     mcs_usage(void);
 225 static void     parse_sec_address_op(struct elfcopy *ecp, int optnum,
 226     const char *optname, char *s);
 227 static void     parse_sec_flags(struct sec_action *sac, char *s);
 228 static void     parse_symlist_file(struct elfcopy *ecp, const char *fn,
 229     unsigned int op);
 230 static void     print_version(void);
 231 static void     set_input_target(struct elfcopy *ecp, const char *target_name);
 232 static void     set_osabi(struct elfcopy *ecp, const char *abi);
 233 static void     set_output_target(struct elfcopy *ecp, const char *target_name);
 234 static void     strip_main(struct elfcopy *ecp, int argc, char **argv);
 235 static void     strip_usage(void);
 236
 237 /*
 238  * An ELF object usually has a sturcture described by the
 239  * diagram below.
 240  *  _____________
 241  * |             |
 242  * |     NULL    | <- always a SHT_NULL section
 243  * |_____________|
 244  * |             |
 245  * |   .interp   |
 246  * |_____________|
 247  * |             |
 248  * |     ...     |
 249  * |_____________|
 250  * |             |
 251  * |    .text    |
 252  * |_____________|
 253  * |             |
 254  * |     ...     |
 255  * |_____________|
 256  * |             |
 257  * |  .comment   | <- above(include) this: normal sections
 258  * |_____________|
 259  * |             |
 260  * | add sections| <- unloadable sections added by --add-section
 261  * |_____________|
 262  * |             |
 263  * |  .shstrtab  | <- section name string table
 264  * |_____________|
 265  * |             |
 266  * |    shdrs    | <- section header table
 267  * |_____________|
 268  * |             |
 269  * |   .symtab   | <- symbol table, if any
 270  * |_____________|
 271  * |             |
 272  * |   .strtab   | <- symbol name string table, if any
 273  * |_____________|
 274  * |             |
 275  * |  .rel.text  | <- relocation info for .o files.
 276  * |_____________|
 277  */
 278 void
 279 create_elf(struct elfcopy *ecp)
 280 {
 281         struct section  *shtab;
 282         GElf_Ehdr        ieh;
 283         GElf_Ehdr        oeh;
 284         size_t           ishnum;
 285
 286         ecp->flags |= SYMTAB_INTACT;
 287
 288         /* Create EHDR. */
 289         if (gelf_getehdr(ecp->ein, &ieh) == NULL)
 290                 errx(EXIT_FAILURE, "gelf_getehdr() failed: %s",
 291                     elf_errmsg(-1));
 292         if ((ecp->iec = gelf_getclass(ecp->ein)) == ELFCLASSNONE)
 293                 errx(EXIT_FAILURE, "getclass() failed: %s",
 294                     elf_errmsg(-1));
 295
 296         if (ecp->oec == ELFCLASSNONE)
 297                 ecp->oec = ecp->iec;
 298         if (ecp->oed == ELFDATANONE)
 299                 ecp->oed = ieh.e_ident[EI_DATA];
 300
 301         if (gelf_newehdr(ecp->eout, ecp->oec) == NULL)
 302                 errx(EXIT_FAILURE, "gelf_newehdr failed: %s",
 303                     elf_errmsg(-1));
 304         if (gelf_getehdr(ecp->eout, &oeh) == NULL)
 305                 errx(EXIT_FAILURE, "gelf_getehdr() failed: %s",
 306                     elf_errmsg(-1));
 307
 308         memcpy(oeh.e_ident, ieh.e_ident, sizeof(ieh.e_ident));
 309         oeh.e_ident[EI_CLASS] = ecp->oec;
 310         oeh.e_ident[EI_DATA]  = ecp->oed;
 311         if (ecp->abi != -1)
 312                 oeh.e_ident[EI_OSABI] = ecp->abi;
 313         oeh.e_flags           = ieh.e_flags;
 314         oeh.e_machine         = ieh.e_machine;
 315         oeh.e_type            = ieh.e_type;
 316         oeh.e_entry           = ieh.e_entry;
 317         oeh.e_version         = ieh.e_version;
 318
 319         ecp->flags &= ~(EXECUTABLE | DYNAMIC | RELOCATABLE);
 320         if (ieh.e_type == ET_EXEC)
 321                 ecp->flags |= EXECUTABLE;
 322         else if (ieh.e_type == ET_DYN)
 323                 ecp->flags |= DYNAMIC;
 324         else if (ieh.e_type == ET_REL)
 325                 ecp->flags |= RELOCATABLE;
 326         else
 327                 errx(EXIT_FAILURE, "unsupported e_type");
 328
 329         if (!elf_getshnum(ecp->ein, &ishnum))
 330                 errx(EXIT_FAILURE, "elf_getshnum failed: %s",
 331                     elf_errmsg(-1));
 332         if (ishnum > 0 && (ecp->secndx = calloc(ishnum,
 333             sizeof(*ecp->secndx))) == NULL)
 334                 err(EXIT_FAILURE, "calloc failed");
 335
 336         /* Read input object program header. */
 337         setup_phdr(ecp);
 338
 339         /*
 340          * Scan of input sections: we iterate through sections from input
 341          * object, skip sections need to be stripped, allot Elf_Scn and
 342          * create internal section structure for sections we want.
 343          * (i.e., determine output sections)
 344          */
 345         create_scn(ecp);
 346
 347         /* Apply section address changes, if any. */
 348         adjust_addr(ecp);
 349
 350         /*
 351          * Determine if the symbol table needs to be changed based on
 352          * command line options.
 353          */
 354         if (ecp->strip == STRIP_DEBUG ||
 355             ecp->strip == STRIP_UNNEEDED ||
 356             ecp->flags & WEAKEN_ALL ||
 357             ecp->flags & LOCALIZE_HIDDEN ||
 358             ecp->flags & DISCARD_LOCAL ||
 359             ecp->flags & DISCARD_LLABEL ||
 360             ecp->prefix_sym != NULL ||
 361             !STAILQ_EMPTY(&ecp->v_symop))
 362                 ecp->flags &= ~SYMTAB_INTACT;
 363
 364         /*
 365          * Create symbol table. Symbols are filtered or stripped according to
 366          * command line args specified by user, and later updated for the new
 367          * layout of sections in the output object.
 368          */
 369         if ((ecp->flags & SYMTAB_EXIST) != 0)
 370                 create_symtab(ecp);
 371
 372         /*
 373          * First processing of output sections: at this stage we copy the
 374          * content of each section from input to output object.  Section
 375          * content will be modified and printed (mcs) if need. Also content of
 376          * relocation section probably will be filtered and updated according
 377          * to symbol table changes.
 378          */
 379         copy_content(ecp);
 380
 381         /*
 382          * Write the underlying ehdr. Note that it should be called
 383          * before elf_setshstrndx() since it will overwrite e->e_shstrndx.
 384          */
 385         if (gelf_update_ehdr(ecp->eout, &oeh) == 0)
 386                 errx(EXIT_FAILURE, "gelf_update_ehdr() failed: %s",
 387                     elf_errmsg(-1));
 388
 389         /* Generate section name string table (.shstrtab). */
 390         set_shstrtab(ecp);
 391
 392         /*
 393          * Second processing of output sections: Update section headers.
 394          * At this stage we set name string index, update st_link and st_info
 395          * for output sections.
 396          */
 397         update_shdr(ecp, 1);
 398
 399         /* Renew oeh to get the updated e_shstrndx. */
 400         if (gelf_getehdr(ecp->eout, &oeh) == NULL)
 401                 errx(EXIT_FAILURE, "gelf_getehdr() failed: %s",
 402                     elf_errmsg(-1));
 403
 404         /*
 405          * Insert SHDR table into the internal section list as a "pseudo"
 406          * section, so later it will get sorted and resynced just as "normal"
 407          * sections.
 408          *
 409          * Under FreeBSD, Binutils objcopy always put the section header
 410          * at the end of all the sections. We want to do the same here.
 411          *
 412          * However, note that the behaviour is still different with Binutils:
 413          * elfcopy checks the FreeBSD OSABI tag to tell whether it needs to
 414          * move the section headers, while Binutils is probably configured
 415          * this way when it's compiled on FreeBSD.
 416          */
 417         if (oeh.e_ident[EI_OSABI] == ELFOSABI_FREEBSD)
 418                 shtab = insert_shtab(ecp, 1);
 419         else
 420                 shtab = insert_shtab(ecp, 0);
 421
 422         /*
 423          * Resync section offsets in the output object. This is needed
 424          * because probably sections are modified or new sections are added,
 425          * as a result overlap/gap might appears.
 426          */
 427         resync_sections(ecp);
 428
 429         /* Store SHDR offset in EHDR. */
 430         oeh.e_shoff = shtab->off;
 431
 432         /* Put program header table immediately after the Elf header. */
 433         if (ecp->ophnum > 0) {
 434                 oeh.e_phoff = gelf_fsize(ecp->eout, ELF_T_EHDR, 1, EV_CURRENT);
 435                 if (oeh.e_phoff == 0)
 436                         errx(EXIT_FAILURE, "gelf_fsize() failed: %s",
 437                             elf_errmsg(-1));
 438         }
 439
 440         /*
 441          * Update ELF object entry point if requested.
 442          */
 443         if (ecp->change_addr != 0)
 444                 oeh.e_entry += ecp->change_addr;
 445         if (ecp->flags & SET_START)
 446                 oeh.e_entry = ecp->set_start;
 447         if (ecp->change_start != 0)
 448                 oeh.e_entry += ecp->change_start;
 449
 450         /*
 451          * Update ehdr again before we call elf_update(), since we
 452          * modified e_shoff and e_phoff.
 453          */
 454         if (gelf_update_ehdr(ecp->eout, &oeh) == 0)
 455                 errx(EXIT_FAILURE, "gelf_update_ehdr() failed: %s",
 456                     elf_errmsg(-1));
 457
 458         if (ecp->ophnum > 0)
 459                 copy_phdr(ecp);
 460
 461         /* Write out the output elf object. */
 462         if (elf_update(ecp->eout, ELF_C_WRITE) < 0)
 463                 errx(EXIT_FAILURE, "elf_update() failed: %s",
 464                     elf_errmsg(-1));
 465
 466         /* Release allocated resource. */
 467         free_elf(ecp);
 468 }
 469
 470 void
 471 free_elf(struct elfcopy *ecp)
 472 {
 473         struct segment  *seg, *seg_temp;
 474         struct section  *sec, *sec_temp;
 475
 476         /* Free internal segment list. */
 477         if (!STAILQ_EMPTY(&ecp->v_seg)) {
 478                 STAILQ_FOREACH_SAFE(seg, &ecp->v_seg, seg_list, seg_temp) {
 479                         STAILQ_REMOVE(&ecp->v_seg, seg, segment, seg_list);
 480                         free(seg);
 481                 }
 482         }
 483
 484         /* Free symbol table buffers. */
 485         free_symtab(ecp);
 486
 487         /* Free internal section list. */
 488         if (!TAILQ_EMPTY(&ecp->v_sec)) {
 489                 TAILQ_FOREACH_SAFE(sec, &ecp->v_sec, sec_list, sec_temp) {
 490                         TAILQ_REMOVE(&ecp->v_sec, sec, sec_list);
 491                         if (sec->buf != NULL)
 492                                 free(sec->buf);
 493                         if (sec->newname != NULL)
 494                                 free(sec->newname);
 495                         if (sec->pad != NULL)
 496                                 free(sec->pad);
 497                         free(sec);
 498                 }
 499         }
 500
 501         if (ecp->secndx != NULL) {
 502                 free(ecp->secndx);
 503                 ecp->secndx = NULL;
 504         }
 505 }
 506
 507 /* Create a temporary file. */
 508 void
 509 create_tempfile(char **fn, int *fd)
 510 {
 511         const char      *tmpdir;
 512         char            *cp, *tmpf;
 513         size_t           tlen, plen;
 514
 515 #define _TEMPFILE "ecp.XXXXXXXX"
 516 #define _TEMPFILEPATH "/tmp/ecp.XXXXXXXX"
 517
 518         if (fn == NULL || fd == NULL)
 519                 return;
 520         /* Repect TMPDIR environment variable. */
 521         tmpdir = getenv("TMPDIR");
 522         if (tmpdir != NULL && *tmpdir != '\0') {
 523                 tlen = strlen(tmpdir);
 524                 plen = strlen(_TEMPFILE);
 525                 tmpf = malloc(tlen + plen + 2);
 526                 if (tmpf == NULL)
 527                         err(EXIT_FAILURE, "malloc failed");
 528                 strncpy(tmpf, tmpdir, tlen);
 529                 cp = &tmpf[tlen - 1];
 530                 if (*cp++ != '/')
 531                         *cp++ = '/';
 532                 strncpy(cp, _TEMPFILE, plen);
 533                 cp[plen] = '\0';
 534         } else {
 535                 tmpf = strdup(_TEMPFILEPATH);
 536                 if (tmpf == NULL)
 537                         err(EXIT_FAILURE, "strdup failed");
 538         }
 539         if ((*fd = mkstemp(tmpf)) == -1)
 540                 err(EXIT_FAILURE, "mkstemp %s failed", tmpf);
 541         if (fchmod(*fd, 0644) == -1)
 542                 err(EXIT_FAILURE, "fchmod %s failed", tmpf);
 543         *fn = tmpf;
 544
 545 #undef _TEMPFILE
 546 #undef _TEMPFILEPATH
 547 }
 548
 549 /*
 550  * Copy temporary file with path src and file descriptor infd to path dst.
 551  * If in_place is set act as if editing the file in place, avoiding rename()
 552  * to preserve hard and symbolic links. Output file remains open, with file
 553  * descriptor returned in outfd.
 554  */
 555 static int
 556 copy_from_tempfile(const char *src, const char *dst, int infd, int *outfd,
 557     int in_place)
 558 {
 559         int tmpfd;
 560
 561         /*
 562          * First, check if we can use rename().
 563          */
 564         if (in_place == 0) {
 565                 if (rename(src, dst) >= 0) {
 566                         *outfd = infd;
 567                         return (0);
 568                 } else if (errno != EXDEV)
 569                         return (-1);
 570
 571                 /*
 572                  * If the rename() failed due to 'src' and 'dst' residing in
 573                  * two different file systems, invoke a helper function in
 574                  * libelftc to do the copy.
 575                  */
 576
 577                 if (unlink(dst) < 0)
 578                         return (-1);
 579         }
 580
 581         if ((tmpfd = open(dst, O_CREAT | O_TRUNC | O_WRONLY, 0755)) < 0)
 582                 return (-1);
 583
 584         if (elftc_copyfile(infd, tmpfd) < 0)
 585                 return (-1);
 586
 587         /*
 588          * Remove the temporary file from the file system
 589          * namespace, and close its file descriptor.
 590          */
 591         if (unlink(src) < 0)
 592                 return (-1);
 593
 594         (void) close(infd);
 595
 596         /*
 597          * Return the file descriptor for the destination.
 598          */
 599         *outfd = tmpfd;
 600
 601         return (0);
 602 }
 603
 604 static void
 605 create_file(struct elfcopy *ecp, const char *src, const char *dst)
 606 {
 607         struct stat      sb;
 608         char            *tempfile, *elftemp;
 609         int              efd, ifd, ofd, ofd0, tfd;
 610         int              in_place;
 611
 612         tempfile = NULL;
 613
 614         if (src == NULL)
 615                 errx(EXIT_FAILURE, "internal: src == NULL");
 616         if ((ifd = open(src, O_RDONLY)) == -1)
 617                 err(EXIT_FAILURE, "open %s failed", src);
 618
 619         if (fstat(ifd, &sb) == -1)
 620                 err(EXIT_FAILURE, "fstat %s failed", src);
 621
 622         if (dst == NULL)
 623                 create_tempfile(&tempfile, &ofd);
 624         else
 625                 if ((ofd = open(dst, O_RDWR|O_CREAT, 0755)) == -1)
 626                         err(EXIT_FAILURE, "open %s failed", dst);
 627
 628 #ifndef LIBELF_AR
 629         /* Detect and process ar(1) archive using libarchive. */
 630         if (ac_detect_ar(ifd)) {
 631                 ac_create_ar(ecp, ifd, ofd);
 632                 goto copy_done;
 633         }
 634 #endif
 635
 636         if (lseek(ifd, 0, SEEK_SET) < 0)
 637                 err(EXIT_FAILURE, "lseek failed");
 638
 639         /*
 640          * If input object is not ELF file, convert it to an intermediate
 641          * ELF object before processing.
 642          */
 643         if (ecp->itf != ETF_ELF) {
 644                 create_tempfile(&elftemp, &efd);
 645                 if ((ecp->eout = elf_begin(efd, ELF_C_WRITE, NULL)) == NULL)
 646                         errx(EXIT_FAILURE, "elf_begin() failed: %s",
 647                             elf_errmsg(-1));
 648                 elf_flagelf(ecp->eout, ELF_C_SET, ELF_F_LAYOUT);
 649                 if (ecp->itf == ETF_BINARY)
 650                         create_elf_from_binary(ecp, ifd, src);
 651                 else if (ecp->itf == ETF_IHEX)
 652                         create_elf_from_ihex(ecp, ifd);
 653                 else if (ecp->itf == ETF_SREC)
 654                         create_elf_from_srec(ecp, ifd);
 655                 else
 656                         errx(EXIT_FAILURE, "Internal: invalid target flavour");
 657                 elf_end(ecp->eout);
 658
 659                 /* Open intermediate ELF object as new input object. */
 660                 close(ifd);
 661                 if ((ifd = open(elftemp, O_RDONLY)) == -1)
 662                         err(EXIT_FAILURE, "open %s failed", src);
 663                 close(efd);
 664                 free(elftemp);
 665         }
 666
 667         if ((ecp->ein = elf_begin(ifd, ELF_C_READ, NULL)) == NULL)
 668                 errx(EXIT_FAILURE, "elf_begin() failed: %s",
 669                     elf_errmsg(-1));
 670
 671         switch (elf_kind(ecp->ein)) {
 672         case ELF_K_NONE:
 673                 errx(EXIT_FAILURE, "file format not recognized");
 674         case ELF_K_ELF:
 675                 if ((ecp->eout = elf_begin(ofd, ELF_C_WRITE, NULL)) == NULL)
 676                         errx(EXIT_FAILURE, "elf_begin() failed: %s",
 677                             elf_errmsg(-1));
 678
 679                 /* elfcopy(1) manage ELF layout by itself. */
 680                 elf_flagelf(ecp->eout, ELF_C_SET, ELF_F_LAYOUT);
 681
 682                 /*
 683                  * Create output ELF object.
 684                  */
 685                 create_elf(ecp);
 686                 elf_end(ecp->eout);
 687
 688                 /*
 689                  * Convert the output ELF object to binary/srec/ihex if need.
 690                  */
 691                 if (ecp->otf != ETF_ELF) {
 692                         /*
 693                          * Create (another) tempfile for binary/srec/ihex
 694                          * output object.
 695                          */
 696                         if (tempfile != NULL) {
 697                                 if (unlink(tempfile) < 0)
 698                                         err(EXIT_FAILURE, "unlink %s failed",
 699                                             tempfile);
 700                                 free(tempfile);
 701                         }
 702                         create_tempfile(&tempfile, &ofd0);
 703
 704
 705                         /*
 706                          * Rewind the file descriptor being processed.
 707                          */
 708                         if (lseek(ofd, 0, SEEK_SET) < 0)
 709                                 err(EXIT_FAILURE,
 710                                     "lseek failed for the output object");
 711
 712                         /*
 713                          * Call flavour-specific conversion routine.
 714                          */
 715                         switch (ecp->otf) {
 716                         case ETF_BINARY:
 717                                 create_binary(ofd, ofd0);
 718                                 break;
 719                         case ETF_IHEX:
 720                                 create_ihex(ofd, ofd0);
 721                                 break;
 722                         case ETF_SREC:
 723                                 create_srec(ecp, ofd, ofd0,
 724                                     dst != NULL ? dst : src);
 725                                 break;
 726                         case ETF_PE:
 727                         case ETF_EFI:
 728 #if     WITH_PE
 729                                 create_pe(ecp, ofd, ofd0);
 730 #else
 731                                 errx(EXIT_FAILURE, "PE/EFI support not enabled"
 732                                     " at compile time");
 733 #endif
 734                                 break;
 735                         default:
 736                                 errx(EXIT_FAILURE, "Internal: unsupported"
 737                                     " output flavour %d", ecp->oec);
 738                         }
 739
 740                         close(ofd);
 741                         ofd = ofd0;
 742                 }
 743
 744                 break;
 745
 746         case ELF_K_AR:
 747                 /* XXX: Not yet supported. */
 748                 break;
 749         default:
 750                 errx(EXIT_FAILURE, "file format not supported");
 751         }
 752
 753         elf_end(ecp->ein);
 754
 755 #ifndef LIBELF_AR
 756 copy_done:
 757 #endif
 758
 759         if (tempfile != NULL) {
 760                 in_place = 0;
 761                 if (dst == NULL) {
 762                         dst = src;
 763                         if (lstat(dst, &sb) != -1 &&
 764                             (sb.st_nlink > 1 || S_ISLNK(sb.st_mode)))
 765                                 in_place = 1;
 766                 }
 767
 768                 if (copy_from_tempfile(tempfile, dst, ofd, &tfd, in_place) < 0)
 769                         err(EXIT_FAILURE, "creation of %s failed", dst);
 770
 771                 free(tempfile);
 772                 tempfile = NULL;
 773
 774                 ofd = tfd;
 775         }
 776
 777         if (strcmp(dst, "/dev/null") && fchmod(ofd, sb.st_mode) == -1)
 778                 err(EXIT_FAILURE, "fchmod %s failed", dst);
 779
 780         if ((ecp->flags & PRESERVE_DATE) &&
 781             elftc_set_timestamps(dst, &sb) < 0)
 782                 err(EXIT_FAILURE, "setting timestamps failed");
 783
 784         close(ifd);
 785         close(ofd);
 786 }
 787
 788 static void
 789 elfcopy_main(struct elfcopy *ecp, int argc, char **argv)
 790 {
 791         struct sec_action       *sac;
 792         const char              *infile, *outfile;
 793         char                    *fn, *s;
 794         int                      opt;
 795
 796         while ((opt = getopt_long(argc, argv, "dB:gG:I:j:K:L:N:O:pR:s:SwW:xXV",
 797             elfcopy_longopts, NULL)) != -1) {
 798                 switch(opt) {
 799                 case 'B':
 800                         /* ignored */
 801                         break;
 802                 case 'R':
 803                         sac = lookup_sec_act(ecp, optarg, 1);
 804                         if (sac->copy != 0)
 805                                 errx(EXIT_FAILURE,
 806                                     "both copy and remove specified");
 807                         sac->remove = 1;
 808                         ecp->flags |= SEC_REMOVE;
 809                         break;
 810                 case 'S':
 811                         ecp->strip = STRIP_ALL;
 812                         break;
 813                 case 'g':
 814                         ecp->strip = STRIP_DEBUG;
 815                         break;
 816                 case 'G':
 817                         ecp->flags |= KEEP_GLOBAL;
 818                         add_to_symop_list(ecp, optarg, NULL, SYMOP_KEEPG);
 819                         break;
 820                 case 'I':
 821                 case 's':
 822                         set_input_target(ecp, optarg);
 823                         break;
 824                 case 'j':
 825                         sac = lookup_sec_act(ecp, optarg, 1);
 826                         if (sac->remove != 0)
 827                                 errx(EXIT_FAILURE,
 828                                     "both copy and remove specified");
 829                         sac->copy = 1;
 830                         ecp->flags |= SEC_COPY;
 831                         break;
 832                 case 'K':
 833                         add_to_symop_list(ecp, optarg, NULL, SYMOP_KEEP);
 834                         break;
 835                 case 'L':
 836                         add_to_symop_list(ecp, optarg, NULL, SYMOP_LOCALIZE);
 837                         break;
 838                 case 'N':
 839                         add_to_symop_list(ecp, optarg, NULL, SYMOP_STRIP);
 840                         break;
 841                 case 'O':
 842                         set_output_target(ecp, optarg);
 843                         break;
 844                 case 'p':
 845                         ecp->flags |= PRESERVE_DATE;
 846                         break;
 847                 case 'V':
 848                         print_version();
 849                         break;
 850                 case 'w':
 851                         ecp->flags |= WILDCARD;
 852                         break;
 853                 case 'W':
 854                         add_to_symop_list(ecp, optarg, NULL, SYMOP_WEAKEN);
 855                         break;
 856                 case 'x':
 857                         ecp->flags |= DISCARD_LOCAL;
 858                         break;
 859                 case 'X':
 860                         ecp->flags |= DISCARD_LLABEL;
 861                         break;
 862                 case ECP_ADD_GNU_DEBUGLINK:
 863                         ecp->debuglink = optarg;
 864                         break;
 865                 case ECP_ADD_SECTION:
 866                         add_section(ecp, optarg);
 867                         break;
 868                 case ECP_CHANGE_ADDR:
 869                         ecp->change_addr = (int64_t) strtoll(optarg, NULL, 0);
 870                         break;
 871                 case ECP_CHANGE_SEC_ADDR:
 872                         parse_sec_address_op(ecp, opt, "--change-section-addr",
 873                             optarg);
 874                         break;
 875                 case ECP_CHANGE_SEC_LMA:
 876                         parse_sec_address_op(ecp, opt, "--change-section-lma",
 877                             optarg);
 878                         break;
 879                 case ECP_CHANGE_SEC_VMA:
 880                         parse_sec_address_op(ecp, opt, "--change-section-vma",
 881                             optarg);
 882                         break;
 883                 case ECP_CHANGE_START:
 884                         ecp->change_start = (int64_t) strtoll(optarg, NULL, 0);
 885                         break;
 886                 case ECP_CHANGE_WARN:
 887                         /* default */
 888                         break;
 889                 case ECP_GAP_FILL:
 890                         ecp->fill = (uint8_t) strtoul(optarg, NULL, 0);
 891                         ecp->flags |= GAP_FILL;
 892                         break;
 893                 case ECP_GLOBALIZE_SYMBOL:
 894                         add_to_symop_list(ecp, optarg, NULL, SYMOP_GLOBALIZE);
 895                         break;
 896                 case ECP_GLOBALIZE_SYMBOLS:
 897                         parse_symlist_file(ecp, optarg, SYMOP_GLOBALIZE);
 898                         break;
 899                 case ECP_KEEP_SYMBOLS:
 900                         parse_symlist_file(ecp, optarg, SYMOP_KEEP);
 901                         break;
 902                 case ECP_KEEP_GLOBAL_SYMBOLS:
 903                         parse_symlist_file(ecp, optarg, SYMOP_KEEPG);
 904                         break;
 905                 case ECP_LOCALIZE_HIDDEN:
 906                         ecp->flags |= LOCALIZE_HIDDEN;
 907                         break;
 908                 case ECP_LOCALIZE_SYMBOLS:
 909                         parse_symlist_file(ecp, optarg, SYMOP_LOCALIZE);
 910                         break;
 911                 case ECP_NO_CHANGE_WARN:
 912                         ecp->flags |= NO_CHANGE_WARN;
 913                         break;
 914                 case ECP_ONLY_DEBUG:
 915                         ecp->strip = STRIP_NONDEBUG;
 916                         break;
 917                 case ECP_ONLY_DWO:
 918                         ecp->strip = STRIP_NONDWO;
 919                         break;
 920                 case ECP_PAD_TO:
 921                         ecp->pad_to = (uint64_t) strtoull(optarg, NULL, 0);
 922                         break;
 923                 case ECP_PREFIX_ALLOC:
 924                         ecp->prefix_alloc = optarg;
 925                         break;
 926                 case ECP_PREFIX_SEC:
 927                         ecp->prefix_sec = optarg;
 928                         break;
 929                 case ECP_PREFIX_SYM:
 930                         ecp->prefix_sym = optarg;
 931                         break;
 932                 case ECP_REDEF_SYMBOL:
 933                         if ((s = strchr(optarg, '=')) == NULL)
 934                                 errx(EXIT_FAILURE,
 935                                     "illegal format for --redefine-sym");
 936                         *s++ = '\0';
 937                         add_to_symop_list(ecp, optarg, s, SYMOP_REDEF);
 938                         break;
 939                 case ECP_REDEF_SYMBOLS:
 940                         parse_symlist_file(ecp, optarg, SYMOP_REDEF);
 941                         break;
 942                 case ECP_RENAME_SECTION:
 943                         if ((fn = strchr(optarg, '=')) == NULL)
 944                                 errx(EXIT_FAILURE,
 945                                     "illegal format for --rename-section");
 946                         *fn++ = '\0';
 947
 948                         /* Check for optional flags. */
 949                         if ((s = strchr(fn, ',')) != NULL)
 950                                 *s++ = '\0';
 951
 952                         sac = lookup_sec_act(ecp, optarg, 1);
 953                         sac->rename = 1;
 954                         sac->newname = fn;
 955                         if (s != NULL)
 956                                 parse_sec_flags(sac, s);
 957                         break;
 958                 case ECP_SET_OSABI:
 959                         set_osabi(ecp, optarg);
 960                         break;
 961                 case ECP_SET_SEC_FLAGS:
 962                         if ((s = strchr(optarg, '=')) == NULL)
 963                                 errx(EXIT_FAILURE,
 964                                     "illegal format for --set-section-flags");
 965                         *s++ = '\0';
 966                         sac = lookup_sec_act(ecp, optarg, 1);
 967                         parse_sec_flags(sac, s);
 968                         break;
 969                 case ECP_SET_START:
 970                         ecp->flags |= SET_START;
 971                         ecp->set_start = (uint64_t) strtoull(optarg, NULL, 0);
 972                         break;
 973                 case ECP_SREC_FORCE_S3:
 974                         ecp->flags |= SREC_FORCE_S3;
 975                         break;
 976                 case ECP_SREC_LEN:
 977                         ecp->flags |= SREC_FORCE_LEN;
 978                         ecp->srec_len = strtoul(optarg, NULL, 0);
 979                         break;
 980                 case ECP_STRIP_DWO:
 981                         ecp->strip = STRIP_DWO;
 982                         break;
 983                 case ECP_STRIP_SYMBOLS:
 984                         parse_symlist_file(ecp, optarg, SYMOP_STRIP);
 985                         break;
 986                 case ECP_STRIP_UNNEEDED:
 987                         ecp->strip = STRIP_UNNEEDED;
 988                         break;
 989                 case ECP_WEAKEN_ALL:
 990                         ecp->flags |= WEAKEN_ALL;
 991                         break;
 992                 case ECP_WEAKEN_SYMBOLS:
 993                         parse_symlist_file(ecp, optarg, SYMOP_WEAKEN);
 994                         break;
 995                 default:
 996                         elfcopy_usage();
 997                 }
 998         }
 999
1000         if (optind == argc || optind + 2 < argc)
1001                 elfcopy_usage();
1002
1003         infile = argv[optind];
1004         outfile = NULL;
1005         if (optind + 1 < argc)
1006                 outfile = argv[optind + 1];
1007
1008         create_file(ecp, infile, outfile);
1009 }
1010
1011 static void
1012 mcs_main(struct elfcopy *ecp, int argc, char **argv)
1013 {
1014         struct sec_action       *sac;
1015         const char              *string;
1016         int                      append, delete, compress, name, print;
1017         int                      opt, i;
1018
1019         append = delete = compress = name = print = 0;
1020         string = NULL;
1021         while ((opt = getopt_long(argc, argv, "a:cdhn:pV", mcs_longopts,
1022                 NULL)) != -1) {
1023                 switch(opt) {
1024                 case 'a':
1025                         append = 1;
1026                         string = optarg; /* XXX multiple -a not supported */
1027                         break;
1028                 case 'c':
1029                         compress = 1;
1030                         break;
1031                 case 'd':
1032                         delete = 1;
1033                         break;
1034                 case 'n':
1035                         name = 1;
1036                         (void)lookup_sec_act(ecp, optarg, 1);
1037                         break;
1038                 case 'p':
1039                         print = 1;
1040                         break;
1041                 case 'V':
1042                         print_version();
1043                         break;
1044                 case 'h':
1045                 default:
1046                         mcs_usage();
1047                 }
1048         }
1049
1050         if (optind == argc)
1051                 mcs_usage();
1052
1053         /* Must specify one operation at least. */
1054         if (!append && !compress && !delete && !print)
1055                 mcs_usage();
1056
1057         /*
1058          * If we are going to delete, ignore other operations. This is
1059          * different from the Solaris implementation, which can print
1060          * and delete a section at the same time, for example. Also, this
1061          * implementation do not respect the order between operations that
1062          * user specified, i.e., "mcs -pc a.out" equals to "mcs -cp a.out".
1063          */
1064         if (delete) {
1065                 append = compress = print = 0;
1066                 ecp->flags |= SEC_REMOVE;
1067         }
1068         if (append)
1069                 ecp->flags |= SEC_APPEND;
1070         if (compress)
1071                 ecp->flags |= SEC_COMPRESS;
1072         if (print)
1073                 ecp->flags |= SEC_PRINT;
1074
1075         /* .comment is the default section to operate on. */
1076         if (!name)
1077                 (void)lookup_sec_act(ecp, ".comment", 1);
1078
1079         STAILQ_FOREACH(sac, &ecp->v_sac, sac_list) {
1080                 sac->append = append;
1081                 sac->compress = compress;
1082                 sac->print = print;
1083                 sac->remove = delete;
1084                 sac->string = string;
1085         }
1086
1087         for (i = optind; i < argc; i++) {
1088                 /* If only -p is specified, output to /dev/null */
1089                 if (print && !append && !compress && !delete)
1090                         create_file(ecp, argv[i], "/dev/null");
1091                 else
1092                         create_file(ecp, argv[i], NULL);
1093         }
1094 }
1095
1096 static void
1097 strip_main(struct elfcopy *ecp, int argc, char **argv)
1098 {
1099         struct sec_action       *sac;
1100         const char              *outfile;
1101         int                      opt;
1102         int                      i;
1103
1104         outfile = NULL;
1105         while ((opt = getopt_long(argc, argv, "hI:K:N:o:O:pR:sSdgVxXw",
1106             strip_longopts, NULL)) != -1) {
1107                 switch(opt) {
1108                 case 'R':
1109                         sac = lookup_sec_act(ecp, optarg, 1);
1110                         sac->remove = 1;
1111                         ecp->flags |= SEC_REMOVE;
1112                         break;
1113                 case 's':
1114                         ecp->strip = STRIP_ALL;
1115                         break;
1116                 case 'S':
1117                 case 'g':
1118                 case 'd':
1119                         ecp->strip = STRIP_DEBUG;
1120                         break;
1121                 case 'I':
1122                         /* ignored */
1123                         break;
1124                 case 'K':
1125                         add_to_symop_list(ecp, optarg, NULL, SYMOP_KEEP);
1126                         break;
1127                 case 'N':
1128                         add_to_symop_list(ecp, optarg, NULL, SYMOP_STRIP);
1129                         break;
1130                 case 'o':
1131                         outfile = optarg;
1132                         break;
1133                 case 'O':
1134                         set_output_target(ecp, optarg);
1135                         break;
1136                 case 'p':
1137                         ecp->flags |= PRESERVE_DATE;
1138                         break;
1139                 case 'V':
1140                         print_version();
1141                         break;
1142                 case 'w':
1143                         ecp->flags |= WILDCARD;
1144                         break;
1145                 case 'x':
1146                         ecp->flags |= DISCARD_LOCAL;
1147                         break;
1148                 case 'X':
1149                         ecp->flags |= DISCARD_LLABEL;
1150                         break;
1151                 case ECP_ONLY_DEBUG:
1152                         ecp->strip = STRIP_NONDEBUG;
1153                         break;
1154                 case ECP_STRIP_UNNEEDED:
1155                         ecp->strip = STRIP_UNNEEDED;
1156                         break;
1157                 case 'h':
1158                 default:
1159                         strip_usage();
1160                 }
1161         }
1162
1163         if (ecp->strip == 0 &&
1164             ((ecp->flags & DISCARD_LOCAL) == 0) &&
1165             ((ecp->flags & DISCARD_LLABEL) == 0) &&
1166             lookup_symop_list(ecp, NULL, SYMOP_STRIP) == NULL)
1167                 ecp->strip = STRIP_ALL;
1168         if (optind == argc)
1169                 strip_usage();
1170
1171         for (i = optind; i < argc; i++)
1172                 create_file(ecp, argv[i], outfile);
1173 }
1174
1175 static void
1176 parse_sec_flags(struct sec_action *sac, char *s)
1177 {
1178         const char      *flag;
1179         int              found, i;
1180
1181         for (flag = strtok(s, ","); flag; flag = strtok(NULL, ",")) {
1182                 found = 0;
1183                 for (i = 0; sec_flags[i].name != NULL; i++)
1184                         if (strcasecmp(sec_flags[i].name, flag) == 0) {
1185                                 sac->flags |= sec_flags[i].value;
1186                                 found = 1;
1187                                 break;
1188                         }
1189                 if (!found)
1190                         errx(EXIT_FAILURE, "unrecognized section flag %s",
1191                             flag);
1192         }
1193 }
1194
1195 static void
1196 parse_sec_address_op(struct elfcopy *ecp, int optnum, const char *optname,
1197     char *s)
1198 {
1199         struct sec_action       *sac;
1200         const char              *name;
1201         char                    *v;
1202         char                     op;
1203
1204         name = v = s;
1205         do {
1206                 v++;
1207         } while (*v != '\0' && *v != '=' && *v != '+' && *v != '-');
1208         if (*v == '\0' || *(v + 1) == '\0')
1209                 errx(EXIT_FAILURE, "invalid format for %s", optname);
1210         op = *v;
1211         *v++ = '\0';
1212         sac = lookup_sec_act(ecp, name, 1);
1213         switch (op) {
1214         case '=':
1215                 if (optnum == ECP_CHANGE_SEC_LMA ||
1216                     optnum == ECP_CHANGE_SEC_ADDR) {
1217                         sac->setlma = 1;
1218                         sac->lma = (uint64_t) strtoull(v, NULL, 0);
1219                 }
1220                 if (optnum == ECP_CHANGE_SEC_VMA ||
1221                     optnum == ECP_CHANGE_SEC_ADDR) {
1222                         sac->setvma = 1;
1223                         sac->vma = (uint64_t) strtoull(v, NULL, 0);
1224                 }
1225                 break;
1226         case '+':
1227                 if (optnum == ECP_CHANGE_SEC_LMA ||
1228                     optnum == ECP_CHANGE_SEC_ADDR)
1229                         sac->lma_adjust = (int64_t) strtoll(v, NULL, 0);
1230                 if (optnum == ECP_CHANGE_SEC_VMA ||
1231                     optnum == ECP_CHANGE_SEC_ADDR)
1232                         sac->vma_adjust = (int64_t) strtoll(v, NULL, 0);
1233                 break;
1234         case '-':
1235                 if (optnum == ECP_CHANGE_SEC_LMA ||
1236                     optnum == ECP_CHANGE_SEC_ADDR)
1237                         sac->lma_adjust = (int64_t) -strtoll(v, NULL, 0);
1238                 if (optnum == ECP_CHANGE_SEC_VMA ||
1239                     optnum == ECP_CHANGE_SEC_ADDR)
1240                         sac->vma_adjust = (int64_t) -strtoll(v, NULL, 0);
1241                 break;
1242         default:
1243                 break;
1244         }
1245 }
1246
1247 static void
1248 parse_symlist_file(struct elfcopy *ecp, const char *fn, unsigned int op)
1249 {
1250         struct symfile  *sf;
1251         struct stat      sb;
1252         FILE            *fp;
1253         char            *data, *p, *line, *end, *e, *n;
1254
1255         if (stat(fn, &sb) == -1)
1256                 err(EXIT_FAILURE, "stat %s failed", fn);
1257
1258         /* Check if we already read and processed this file. */
1259         STAILQ_FOREACH(sf, &ecp->v_symfile, symfile_list) {
1260                 if (sf->dev == sb.st_dev && sf->ino == sb.st_ino)
1261                         goto process_symfile;
1262         }
1263
1264         if ((fp = fopen(fn, "r")) == NULL)
1265                 err(EXIT_FAILURE, "can not open %s", fn);
1266         if ((data = malloc(sb.st_size + 1)) == NULL)
1267                 err(EXIT_FAILURE, "malloc failed");
1268         if (fread(data, 1, sb.st_size, fp) == 0 || ferror(fp))
1269                 err(EXIT_FAILURE, "fread failed");
1270         fclose(fp);
1271         data[sb.st_size] = '\0';
1272
1273         if ((sf = calloc(1, sizeof(*sf))) == NULL)
1274                 err(EXIT_FAILURE, "malloc failed");
1275         sf->dev = sb.st_dev;
1276         sf->ino = sb.st_ino;
1277         sf->size = sb.st_size + 1;
1278         sf->data = data;
1279
1280 process_symfile:
1281
1282         /*
1283          * Basically what we do here is to convert EOL to '\0', and remove
1284          * leading and trailing whitespaces for each line.
1285          */
1286
1287         end = sf->data + sf->size;
1288         line = NULL;
1289         for(p = sf->data; p < end; p++) {
1290                 if ((*p == '\t' || *p == ' ') && line == NULL)
1291                         continue;
1292                 if (*p == '\r' || *p == '\n' || *p == '\0') {
1293                         *p = '\0';
1294                         if (line == NULL)
1295                                 continue;
1296
1297                         /* Skip comment. */
1298                         if (*line == '#') {
1299                                 line = NULL;
1300                                 continue;
1301                         }
1302
1303                         e = p - 1;
1304                         while(e != line && (*e == '\t' || *e == ' '))
1305                                 *e-- = '\0';
1306                         if (op != SYMOP_REDEF)
1307                                 add_to_symop_list(ecp, line, NULL, op);
1308                         else {
1309                                 if (strlen(line) < 3)
1310                                         errx(EXIT_FAILURE,
1311                                             "illegal format for"
1312                                             " --redefine-sym");
1313                                 for(n = line + 1; n < e; n++) {
1314                                         if (*n == ' ' || *n == '\t') {
1315                                                 while(*n == ' ' || *n == '\t')
1316                                                         *n++ = '\0';
1317                                                 break;
1318                                         }
1319                                 }
1320                                 if (n >= e)
1321                                         errx(EXIT_FAILURE,
1322                                             "illegal format for"
1323                                             " --redefine-sym");
1324                                 add_to_symop_list(ecp, line, n, op);
1325                         }
1326                         line = NULL;
1327                         continue;
1328                 }
1329
1330                 if (line == NULL)
1331                         line = p;
1332         }
1333 }
1334
1335 static void
1336 set_input_target(struct elfcopy *ecp, const char *target_name)
1337 {
1338         Elftc_Bfd_Target *tgt;
1339
1340         if ((tgt = elftc_bfd_find_target(target_name)) == NULL)
1341                 errx(EXIT_FAILURE, "%s: invalid target name", target_name);
1342         ecp->itf = elftc_bfd_target_flavor(tgt);
1343 }
1344
1345 static void
1346 set_output_target(struct elfcopy *ecp, const char *target_name)
1347 {
1348         Elftc_Bfd_Target *tgt;
1349
1350         if ((tgt = elftc_bfd_find_target(target_name)) == NULL)
1351                 errx(EXIT_FAILURE, "%s: invalid target name", target_name);
1352         ecp->otf = elftc_bfd_target_flavor(tgt);
1353         if (ecp->otf == ETF_ELF) {
1354                 ecp->oec = elftc_bfd_target_class(tgt);
1355                 ecp->oed = elftc_bfd_target_byteorder(tgt);
1356                 ecp->oem = elftc_bfd_target_machine(tgt);
1357         }
1358         if (ecp->otf == ETF_EFI || ecp->otf == ETF_PE)
1359                 ecp->oem = elftc_bfd_target_machine(tgt);
1360
1361         ecp->otgt = target_name;
1362 }
1363
1364 static void
1365 set_osabi(struct elfcopy *ecp, const char *abi)
1366 {
1367         int i, found;
1368
1369         found = 0;
1370         for (i = 0; osabis[i].name != NULL; i++)
1371                 if (strcasecmp(osabis[i].name, abi) == 0) {
1372                         ecp->abi = osabis[i].abi;
1373                         found = 1;
1374                         break;
1375                 }
1376         if (!found)
1377                 errx(EXIT_FAILURE, "unrecognized OSABI %s", abi);
1378 }
1379
1380 #define ELFCOPY_USAGE_MESSAGE   "\
1381 Usage: %s [options] infile [outfile]\n\
1382   Transform object files.\n\n\
1383   Options:\n\
1384   -d | -g | --strip-debug      Remove debugging information from the output.\n\
1385   -j SECTION | --only-section=SECTION\n\
1386                                Copy only the named section to the output.\n\
1387   -p | --preserve-dates        Preserve access and modification times.\n\
1388   -w | --wildcard              Use shell-style patterns to name symbols.\n\
1389   -x | --discard-all           Do not copy non-globals to the output.\n\
1390   -I FORMAT | --input-target=FORMAT\n\
1391                                Specify object format for the input file.\n\
1392   -K SYM | --keep-symbol=SYM   Copy symbol SYM to the output.\n\
1393   -L SYM | --localize-symbol=SYM\n\
1394                                Make symbol SYM local to the output file.\n\
1395   -N SYM | --strip-symbol=SYM  Do not copy symbol SYM to the output.\n\
1396   -O FORMAT | --output-target=FORMAT\n\
1397                                Specify object format for the output file.\n\
1398                                FORMAT should be a target name understood by\n\
1399                                elftc_bfd_find_target(3).\n\
1400   -R NAME | --remove-section=NAME\n\
1401                                Remove the named section.\n\
1402   -S | --strip-all             Remove all symbol and relocation information\n\
1403                                from the output.\n\
1404   -V | --version               Print a version identifier and exit.\n\
1405   -W SYM | --weaken-symbol=SYM Mark symbol SYM as weak in the output.\n\
1406   -X | --discard-locals        Do not copy compiler generated symbols to\n\
1407                                the output.\n\
1408   --add-section NAME=FILE      Add the contents of FILE to the ELF object as\n\
1409                                a new section named NAME.\n\
1410   --adjust-section-vma SECTION{=,+,-}VAL | \\\n\
1411     --change-section-address SECTION{=,+,-}VAL\n\
1412                                Set or adjust the VMA and the LMA of the\n\
1413                                named section by VAL.\n\
1414   --adjust-start=INCR | --change-start=INCR\n\
1415                                Add INCR to the start address for the ELF\n\
1416                                object.\n\
1417   --adjust-vma=INCR | --change-addresses=INCR\n\
1418                                Increase the VMA and LMA of all sections by\n\
1419                                INCR.\n\
1420   --adjust-warning | --change-warnings\n\
1421                                Issue warnings for non-existent sections.\n\
1422   --change-section-lma SECTION{=,+,-}VAL\n\
1423                                Set or adjust the LMA address of the named\n\
1424                                section by VAL.\n\
1425   --change-section-vma SECTION{=,+,-}VAL\n\
1426                                Set or adjust the VMA address of the named\n\
1427                                section by VAL.\n\
1428   --gap-fill=VAL               Fill the gaps between sections with bytes\n\
1429                                of value VAL.\n\
1430   --localize-hidden            Make all hidden symbols local to the output\n\
1431                                file.\n\
1432   --no-adjust-warning| --no-change-warnings\n\
1433                                Do not issue warnings for non-existent\n\
1434                                sections.\n\
1435   --only-keep-debug            Copy only debugging information.\n\
1436   --output-target=FORMAT       Use the specified format for the output.\n\
1437   --pad-to=ADDRESS             Pad the output object upto the given address.\n\
1438   --prefix-alloc-sections=STRING\n\
1439                                Prefix the section names of all the allocated\n\
1440                                sections with STRING.\n\
1441   --prefix-sections=STRING     Prefix the section names of all the sections\n\
1442                                with STRING.\n\
1443   --prefix-symbols=STRING      Prefix the symbol names of all the symbols\n\
1444                                with STRING.\n\
1445   --rename-section OLDNAME=NEWNAME[,FLAGS]\n\
1446                                Rename and optionally change section flags.\n\
1447   --set-section-flags SECTION=FLAGS\n\
1448                                Set section flags for the named section.\n\
1449                                Supported flags are: 'alloc', 'code',\n\
1450                                'contents', 'data', 'debug', 'load',\n\
1451                                'noload', 'readonly', 'rom', and 'shared'.\n\
1452   --set-start=ADDRESS          Set the start address of the ELF object.\n\
1453   --srec-forceS3               Only generate S3 S-Records.\n\
1454   --srec-len=LEN               Set the maximum length of a S-Record line.\n\
1455   --strip-unneeded             Do not copy relocation information.\n"
1456
1457 static void
1458 elfcopy_usage(void)
1459 {
1460         (void) fprintf(stderr, ELFCOPY_USAGE_MESSAGE, ELFTC_GETPROGNAME());
1461         exit(EXIT_FAILURE);
1462 }
1463
1464 #define MCS_USAGE_MESSAGE       "\
1465 Usage: %s [options] file...\n\
1466   Manipulate the comment section in an ELF object.\n\n\
1467   Options:\n\
1468   -a STRING        Append 'STRING' to the comment section.\n\
1469   -c               Remove duplicate entries from the comment section.\n\
1470   -d               Delete the comment section.\n\
1471   -h | --help      Print a help message and exit.\n\
1472   -n NAME          Operate on the ELF section with name 'NAME'.\n\
1473   -p               Print the contents of the comment section.\n\
1474   -V | --version   Print a version identifier and exit.\n"
1475
1476 static void
1477 mcs_usage(void)
1478 {
1479         (void) fprintf(stderr, MCS_USAGE_MESSAGE, ELFTC_GETPROGNAME());
1480         exit(EXIT_FAILURE);
1481 }
1482
1483 #define STRIP_USAGE_MESSAGE     "\
1484 Usage: %s [options] file...\n\
1485   Discard information from ELF objects.\n\n\
1486   Options:\n\
1487   -d | -g | -S | --strip-debug    Remove debugging symbols.\n\
1488   -h | --help                     Print a help message.\n\
1489   -o FILE | --output-file FILE    Write output to FILE.\n\
1490   --only-keep-debug               Keep debugging information only.\n\
1491   -p | --preserve-dates           Preserve access and modification times.\n\
1492   -s | --strip-all                Remove all symbols.\n\
1493   --strip-unneeded                Remove symbols not needed for relocation\n\
1494                                   processing.\n\
1495   -w | --wildcard                 Use shell-style patterns to name symbols.\n\
1496   -x | --discard-all              Discard all non-global symbols.\n\
1497   -I TGT| --input-target=TGT      (Accepted, but ignored).\n\
1498   -K SYM | --keep-symbol=SYM      Keep symbol 'SYM' in the output.\n\
1499   -N SYM | --strip-symbol=SYM     Remove symbol 'SYM' from the output.\n\
1500   -O TGT | --output-target=TGT    Set the output file format to 'TGT'.\n\
1501   -R SEC | --remove-section=SEC   Remove the section named 'SEC'.\n\
1502   -V | --version                  Print a version identifier and exit.\n\
1503   -X | --discard-locals           Remove compiler-generated local symbols.\n"
1504
1505 static void
1506 strip_usage(void)
1507 {
1508         (void) fprintf(stderr, STRIP_USAGE_MESSAGE, ELFTC_GETPROGNAME());
1509         exit(EXIT_FAILURE);
1510 }
1511
1512 static void
1513 print_version(void)
1514 {
1515         (void) printf("%s (%s)\n", ELFTC_GETPROGNAME(), elftc_version());
1516         exit(EXIT_SUCCESS);
1517 }
1518
1519 int
1520 main(int argc, char **argv)
1521 {
1522         struct elfcopy *ecp;
1523
1524         if (elf_version(EV_CURRENT) == EV_NONE)
1525                 errx(EXIT_FAILURE, "ELF library initialization failed: %s",
1526                     elf_errmsg(-1));
1527
1528         ecp = calloc(1, sizeof(*ecp));
1529         if (ecp == NULL)
1530                 err(EXIT_FAILURE, "calloc failed");
1531         memset(ecp, 0, sizeof(*ecp));
1532
1533         ecp->itf = ecp->otf = ETF_ELF;
1534         ecp->iec = ecp->oec = ELFCLASSNONE;
1535         ecp->oed = ELFDATANONE;
1536         ecp->abi = -1;
1537         /* There is always an empty section. */
1538         ecp->nos = 1;
1539         ecp->fill = 0;
1540
1541         STAILQ_INIT(&ecp->v_seg);
1542         STAILQ_INIT(&ecp->v_sac);
1543         STAILQ_INIT(&ecp->v_sadd);
1544         STAILQ_INIT(&ecp->v_symop);
1545         STAILQ_INIT(&ecp->v_symfile);
1546         STAILQ_INIT(&ecp->v_arobj);
1547         TAILQ_INIT(&ecp->v_sec);
1548
1549         if ((ecp->progname = ELFTC_GETPROGNAME()) == NULL)
1550                 ecp->progname = "elfcopy";
1551
1552         if (strcmp(ecp->progname, "strip") == 0)
1553                 strip_main(ecp, argc, argv);
1554         else if (strcmp(ecp->progname, "mcs") == 0)
1555                 mcs_main(ecp, argc, argv);
1556         else
1557                 elfcopy_main(ecp, argc, argv);
1558
1559         free_sec_add(ecp);
1560         free_sec_act(ecp);
1561         free(ecp);
1562
1563         exit(EXIT_SUCCESS);
1564 }