ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright (C) 1991, 92, 93, 94, 1995 Free Software Foundation, Inc.
   3
   4 This file is part of GLD, the Gnu Linker.
   5
   6 GLD is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GLD is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GLD; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "bfd.h"
  21 #include "sysdep.h"
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <ctype.h>
  25 #include "getopt.h"
  26 #include "bfdlink.h"
  27 #include "ld.h"
  28 #include "ldmain.h"
  29 #include "ldmisc.h"
  30 #include "ldexp.h"
  31 #include "ldlang.h"
  32 #include "ldgram.h"
  33 #include "ldlex.h"
  34 #include "ldfile.h"
  35 #include "ldver.h"
  36 #include "ldemul.h"
  37
  38 /* Somewhere above, sys/stat.h got included . . . . */
  39 #if !defined(S_ISDIR) && defined(S_IFDIR)
  40 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  41 #endif
  42
  43 /* Omit args to avoid the possibility of clashing with a system header
  44    that might disagree about consts.  */
  45 unsigned long strtoul ();
  46
  47 static void set_default_dirlist PARAMS ((char *dirlist_ptr));
  48 static void set_section_start PARAMS ((char *sect, char *valstr));
  49
  50 /* Non-zero if we are processing a --defsym from the command line.  */
  51 int parsing_defsym = 0;
  52
  53 void
  54 parse_args (argc, argv)
  55      int argc;
  56      char **argv;
  57 {
  58   int i;
  59   int ingroup = 0;
  60   char *default_dirlist = NULL;
  61
  62   /* Starting the short option string with '-' is for programs that
  63      expect options and other ARGV-elements in any order and that care about
  64      the ordering of the two.  We describe each non-option ARGV-element
  65      as if it were the argument of an option with character code 1.  */
  66
  67   const char *shortopts =
  68     "-a:A:b:c:de:F::G:gh:iL:l:Mm:NnO:o:R:rSsT:tu:VvXxY:y:z:()";
  69
  70   /* 150 isn't special; it's just an arbitrary non-ASCII char value.  */
  71
  72 #define OPTION_ASSERT                   150
  73 #define OPTION_CALL_SHARED              (OPTION_ASSERT + 1)
  74 #define OPTION_DEFSYM                   (OPTION_CALL_SHARED + 1)
  75 #define OPTION_DYNAMIC_LINKER           (OPTION_DEFSYM + 1)
  76 #define OPTION_EB                       (OPTION_DYNAMIC_LINKER + 1)
  77 #define OPTION_EL                       (OPTION_EB + 1)
  78 #define OPTION_EMBEDDED_RELOCS          (OPTION_EL + 1)
  79 #define OPTION_EXPORT_DYNAMIC           (OPTION_EMBEDDED_RELOCS + 1)
  80 #define OPTION_HELP                     (OPTION_EXPORT_DYNAMIC + 1)
  81 #define OPTION_IGNORE                   (OPTION_HELP + 1)
  82 #define OPTION_MAP                      (OPTION_IGNORE + 1)
  83 #define OPTION_NO_KEEP_MEMORY           (OPTION_MAP + 1)
  84 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_KEEP_MEMORY + 1)
  85 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  86 #define OPTION_NO_WHOLE_ARCHIVE         (OPTION_NON_SHARED + 1)
  87 #define OPTION_OFORMAT                  (OPTION_NO_WHOLE_ARCHIVE + 1)
  88 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  89 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  90 #define OPTION_RPATH                    (OPTION_RETAIN_SYMBOLS_FILE + 1)
  91 #define OPTION_RPATH_LINK               (OPTION_RPATH + 1)
  92 #define OPTION_SHARED                   (OPTION_RPATH_LINK + 1)
  93 #define OPTION_SONAME                   (OPTION_SHARED + 1)
  94 #define OPTION_SORT_COMMON              (OPTION_SONAME + 1)
  95 #define OPTION_STATS                    (OPTION_SORT_COMMON + 1)
  96 #define OPTION_SYMBOLIC                 (OPTION_STATS + 1)
  97 #define OPTION_TBSS                     (OPTION_SYMBOLIC + 1)
  98 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  99 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
 100 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
 101 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
 102 #define OPTION_VERBOSE                  (OPTION_UR + 1)
 103 #define OPTION_VERSION                  (OPTION_VERBOSE + 1)
 104 #define OPTION_WARN_COMMON              (OPTION_VERSION + 1)
 105 #define OPTION_WARN_CONSTRUCTORS        (OPTION_WARN_COMMON + 1)
 106 #define OPTION_WARN_ONCE                (OPTION_WARN_CONSTRUCTORS + 1)
 107 #define OPTION_SPLIT_BY_RELOC           (OPTION_WARN_ONCE + 1)
 108 #define OPTION_SPLIT_BY_FILE            (OPTION_SPLIT_BY_RELOC + 1)
 109 #define OPTION_WHOLE_ARCHIVE            (OPTION_SPLIT_BY_FILE + 1)
 110
 111
 112   static struct option longopts[] = {
 113   /* Sorted alphabeticaly, except for the PE options grouped at the end. */
 114     {"assert", required_argument, NULL, OPTION_ASSERT},
 115     {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 116     {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 117     {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 118     {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 119     {"dc", no_argument, NULL, 'd'},
 120     {"defsym", required_argument, NULL, OPTION_DEFSYM},
 121     {"dll-verbose", no_argument, NULL, OPTION_VERSION}, /* Linux.  */
 122     {"dn", no_argument, NULL, OPTION_NON_SHARED},
 123     {"dp", no_argument, NULL, 'd'},
 124     {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 125     {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 126     {"EB", no_argument, NULL, OPTION_EB},
 127     {"EL", no_argument, NULL, OPTION_EL},
 128     {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 129     {"end-group", no_argument, NULL, ')'},
 130     {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 131     {"format", required_argument, NULL, 'b'},
 132     {"help", no_argument, NULL, OPTION_HELP},
 133     {"Map", required_argument, NULL, OPTION_MAP},
 134     {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 135     {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 136     {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 137     {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 138     {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 139     {"oformat", required_argument, NULL, OPTION_OFORMAT},
 140     {"Qy", no_argument, NULL, OPTION_IGNORE},
 141     {"qmagic", no_argument, NULL, OPTION_IGNORE}, /* Linux compatibility.  */
 142     {"relax", no_argument, NULL, OPTION_RELAX},
 143     {"retain-symbols-file", required_argument, NULL, OPTION_RETAIN_SYMBOLS_FILE},
 144     {"rpath", required_argument, NULL, OPTION_RPATH},
 145     {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 146     {"shared", no_argument, NULL, OPTION_SHARED},
 147     {"soname", required_argument, NULL, OPTION_SONAME},
 148     {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 149     {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 150     {"start-group", no_argument, NULL, '('},
 151     {"stats", no_argument, NULL, OPTION_STATS},
 152     {"static", no_argument, NULL, OPTION_NON_SHARED},
 153     {"Tbss", required_argument, NULL, OPTION_TBSS},
 154     {"Tdata", required_argument, NULL, OPTION_TDATA},
 155     {"Ttext", required_argument, NULL, OPTION_TTEXT},
 156     {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 157     {"Ur", no_argument, NULL, OPTION_UR},
 158     {"verbose", no_argument, NULL, OPTION_VERBOSE},
 159     {"version", no_argument, NULL, OPTION_VERSION},
 160     {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 161     {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 162     {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 163     {"split-by-reloc", required_argument, NULL, OPTION_SPLIT_BY_RELOC},
 164     {"split-by-file", no_argument, NULL, OPTION_SPLIT_BY_FILE},
 165     {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 166
 167
 168     {NULL, no_argument, NULL, 0}
 169   };
 170
 171   /* The -G option is ambiguous on different platforms.  Sometimes it
 172      specifies the largest data size to put into the small data
 173      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 174      the first form takes an argument, while the second does not.
 175
 176      We need to permit the --shared form because on some platforms,
 177      such as Solaris, gcc -shared will pass -G to the linker.
 178
 179      To permit either usage, we look through the argument list.  If we
 180      find -G not followed by a number, we change it into --shared.
 181      This will work for most normal cases.  */
 182   for (i = 1; i < argc; i++)
 183     if (strcmp (argv[i], "-G") == 0
 184         && (i + 1 >= argc
 185             || ! isdigit (argv[i + 1][0])))
 186       argv[i] = (char *) "--shared";
 187
 188   while (1)
 189     {
 190       /* getopt_long_only is like getopt_long, but '-' as well as '--' can
 191          indicate a long option.  */
 192       int longind;
 193       int optc;
 194
 195       if (ldemul_parse_args (argc, argv))
 196         continue;
 197
 198       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 199
 200       if (optc == -1)
 201         break;
 202       switch (optc)
 203         {
 204         default:
 205           xexit (1);
 206         case 1:                 /* File name.  */
 207           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 208                                (char *) NULL);
 209           break;
 210
 211         case OPTION_IGNORE:
 212           break;
 213         case 'a':
 214           /* For HP/UX compatibility.  Actually -a shared should mean
 215              ``use only shared libraries'' but, then, we don't
 216              currently support shared libraries on HP/UX anyhow.  */
 217           if (strcmp (optarg, "archive") == 0)
 218             config.dynamic_link = false;
 219           else if (strcmp (optarg, "shared") == 0
 220                    || strcmp (optarg, "default") == 0)
 221             config.dynamic_link = true;
 222           else
 223             einfo ("%P%F: unrecognized -a option `%s'\n", optarg);
 224           break;
 225         case OPTION_ASSERT:
 226           /* FIXME: We just ignore these, but we should handle them.  */
 227           if (strcmp (optarg, "definitions") == 0)
 228             ;
 229           else if (strcmp (optarg, "nodefinitions") == 0)
 230             ;
 231           else if (strcmp (optarg, "nosymbolic") == 0)
 232             ;
 233           else if (strcmp (optarg, "pure-text") == 0)
 234             ;
 235           else
 236             einfo ("%P%F: unrecognized -assert option `%s'\n", optarg);
 237           break;
 238         case 'A':
 239           ldfile_add_arch (optarg);
 240           break;
 241         case 'b':
 242           lang_add_target (optarg);
 243           break;
 244         case 'c':
 245           ldfile_open_command_file (optarg);
 246           parser_input = input_mri_script;
 247           yyparse ();
 248           break;
 249         case OPTION_CALL_SHARED:
 250           config.dynamic_link = true;
 251           break;
 252         case OPTION_NON_SHARED:
 253           config.dynamic_link = false;
 254           break;
 255         case 'd':
 256           command_line.force_common_definition = true;
 257           break;
 258         case OPTION_DEFSYM:
 259           lex_string = optarg;
 260           lex_redirect (optarg);
 261           parser_input = input_defsym;
 262           parsing_defsym = 1;
 263           yyparse ();
 264           parsing_defsym = 0;
 265           lex_string = NULL;
 266           break;
 267         case OPTION_DYNAMIC_LINKER:
 268           command_line.interpreter = optarg;
 269           break;
 270         case OPTION_EB:
 271           command_line.endian = ENDIAN_BIG;
 272           break;
 273         case OPTION_EL:
 274           command_line.endian = ENDIAN_LITTLE;
 275           break;
 276         case OPTION_EMBEDDED_RELOCS:
 277           command_line.embedded_relocs = true;
 278           break;
 279         case OPTION_EXPORT_DYNAMIC:
 280           command_line.export_dynamic = true;
 281           break;
 282         case 'e':
 283           lang_add_entry (optarg, true);
 284           break;
 285         case 'F':
 286           /* Ignore.  */
 287           break;
 288         case 'G':
 289           {
 290             char *end;
 291             g_switch_value = strtoul (optarg, &end, 0);
 292             if (*end)
 293               einfo ("%P%F: invalid number `%s'\n", optarg);
 294           }
 295           break;
 296         case 'g':
 297           /* Ignore.  */
 298           break;
 299         case OPTION_HELP:
 300           help ();
 301           xexit (0);
 302           break;
 303         case 'L':
 304           ldfile_add_library_path (optarg, true);
 305           break;
 306         case 'l':
 307           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 308                                (char *) NULL);
 309           break;
 310         case 'M':
 311           config.map_filename = "-";
 312           break;
 313         case 'm':
 314           /* Ignore.  Was handled in a pre-parse.   */
 315           break;
 316         case OPTION_MAP:
 317           config.map_filename = optarg;
 318           break;
 319         case 'N':
 320           config.text_read_only = false;
 321           config.magic_demand_paged = false;
 322           config.dynamic_link = false;
 323           break;
 324         case 'n':
 325           config.magic_demand_paged = false;
 326           config.dynamic_link = false;
 327           break;
 328         case OPTION_NO_KEEP_MEMORY:
 329           link_info.keep_memory = false;
 330           break;
 331         case OPTION_NOINHIBIT_EXEC:
 332           force_make_executable = true;
 333           break;
 334         case OPTION_NO_WHOLE_ARCHIVE:
 335           whole_archive = false;
 336           break;
 337         case 'O':
 338           /* FIXME "-O<non-digits> <value>" used to set the address of
 339              section <non-digits>.  Was this for compatibility with
 340              something, or can we create a new option to do that
 341              (with a syntax similar to -defsym)?
 342              getopt can't handle two args to an option without kludges.  */
 343           break;
 344         case 'o':
 345           lang_add_output (optarg, 0);
 346           break;
 347         case OPTION_OFORMAT:
 348           lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
 349           break;
 350         case 'i':
 351         case 'r':
 352           link_info.relocateable = true;
 353           config.build_constructors = false;
 354           config.magic_demand_paged = false;
 355           config.text_read_only = false;
 356           config.dynamic_link = false;
 357           break;
 358         case 'R':
 359           /* The GNU linker traditionally uses -R to mean to include
 360              only the symbols from a file.  The Solaris linker uses -R
 361              to set the path used by the runtime linker to find
 362              libraries.  This is the GNU linker -rpath argument.  We
 363              try to support both simultaneously by checking the file
 364              named.  If it is a directory, rather than a regular file,
 365              we assume -rpath was meant.  */
 366           {
 367             struct stat s;
 368
 369             if (stat (optarg, &s) >= 0
 370                 && ! S_ISDIR (s.st_mode))
 371               {
 372                 lang_add_input_file (optarg,
 373                                      lang_input_file_is_symbols_only_enum,
 374                                      (char *) NULL);
 375                 break;
 376               }
 377           }
 378           /* Fall through.  */
 379         case OPTION_RPATH:
 380           if (command_line.rpath == NULL)
 381             command_line.rpath = buystring (optarg);
 382           else
 383             {
 384               char *buf;
 385
 386               buf = xmalloc (strlen (command_line.rpath)
 387                              + strlen (optarg)
 388                              + 2);
 389               sprintf (buf, "%s:%s", command_line.rpath, optarg);
 390               free (command_line.rpath);
 391               command_line.rpath = buf;
 392             }
 393           break;
 394         case OPTION_RPATH_LINK:
 395           if (command_line.rpath_link == NULL)
 396             command_line.rpath_link = buystring (optarg);
 397           else
 398             {
 399               char *buf;
 400
 401               buf = xmalloc (strlen (command_line.rpath_link)
 402                              + strlen (optarg)
 403                              + 2);
 404               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
 405               free (command_line.rpath_link);
 406               command_line.rpath_link = buf;
 407             }
 408           break;
 409         case OPTION_RELAX:
 410           command_line.relax = true;
 411           break;
 412         case OPTION_RETAIN_SYMBOLS_FILE:
 413           add_keepsyms_file (optarg);
 414           break;
 415         case 'S':
 416           link_info.strip = strip_debugger;
 417           break;
 418         case 's':
 419           link_info.strip = strip_all;
 420           break;
 421         case OPTION_SHARED:
 422           link_info.shared = true;
 423           break;
 424         case 'h':               /* Used on Solaris.  */
 425         case OPTION_SONAME:
 426           command_line.soname = optarg;
 427           break;
 428         case OPTION_SORT_COMMON:
 429           config.sort_common = true;
 430           break;
 431         case OPTION_STATS:
 432           config.stats = true;
 433           break;
 434         case OPTION_SYMBOLIC:
 435           link_info.symbolic = true;
 436           break;
 437         case 't':
 438           trace_files = true;
 439           break;
 440         case 'T':
 441           ldfile_open_command_file (optarg);
 442           parser_input = input_script;
 443           yyparse ();
 444           break;
 445         case OPTION_TBSS:
 446           set_section_start (".bss", optarg);
 447           break;
 448         case OPTION_TDATA:
 449           set_section_start (".data", optarg);
 450           break;
 451         case OPTION_TTEXT:
 452           set_section_start (".text", optarg);
 453           break;
 454         case OPTION_TRADITIONAL_FORMAT:
 455           config.traditional_format = true;
 456           break;
 457         case OPTION_UR:
 458           link_info.relocateable = true;
 459           config.build_constructors = true;
 460           config.magic_demand_paged = false;
 461           config.text_read_only = false;
 462           config.dynamic_link = false;
 463           break;
 464         case 'u':
 465           ldlang_add_undef (optarg);
 466           break;
 467         case OPTION_VERBOSE:
 468           ldversion (1);
 469           version_printed = true;
 470           trace_file_tries = true;
 471           break;
 472         case 'v':
 473           ldversion (0);
 474           version_printed = true;
 475           break;
 476         case 'V':
 477           ldversion (1);
 478           version_printed = true;
 479           break;
 480         case OPTION_VERSION:
 481           ldversion (0);
 482           version_printed = true;
 483           break;
 484         case OPTION_WARN_COMMON:
 485           config.warn_common = true;
 486           break;
 487         case OPTION_WARN_CONSTRUCTORS:
 488           config.warn_constructors = true;
 489           break;
 490         case OPTION_WARN_ONCE:
 491           config.warn_once = true;
 492           break;
 493         case OPTION_WHOLE_ARCHIVE:
 494           whole_archive = true;
 495           break;
 496         case 'X':
 497           link_info.discard = discard_l;
 498           break;
 499         case 'x':
 500           link_info.discard = discard_all;
 501           break;
 502         case 'Y':
 503           if (strncmp (optarg, "P,", 2) == 0)
 504             optarg += 2;
 505           default_dirlist = optarg;
 506           break;
 507         case 'y':
 508           add_ysym (optarg);
 509           break;
 510         case 'z':
 511           /* We accept and ignore this option for Solaris
 512              compatibility.  Actually, on Solaris, optarg is not
 513              ignored.  Someday we should handle it correctly.  FIXME.  */
 514           break;
 515         case OPTION_SPLIT_BY_RELOC:
 516           config.split_by_reloc = atoi (optarg);
 517           break;
 518         case OPTION_SPLIT_BY_FILE:
 519           config.split_by_file = true;
 520           break;
 521         case '(':
 522           if (ingroup)
 523             {
 524               fprintf (stderr,
 525                        "%s: may not nest groups (--help for usage)\n",
 526                        program_name);
 527               xexit (1);
 528             }
 529           lang_enter_group ();
 530           ingroup = 1;
 531           break;
 532         case ')':
 533           if (! ingroup)
 534             {
 535               fprintf (stderr,
 536                        "%s: group ended before it began (--help for usage)\n",
 537                        program_name);
 538               xexit (1);
 539             }
 540           lang_leave_group ();
 541           ingroup = 0;
 542           break;
 543
 544         }
 545     }
 546
 547   if (ingroup)
 548     lang_leave_group ();
 549
 550   if (default_dirlist != NULL)
 551     set_default_dirlist (default_dirlist);
 552
 553 }
 554
 555 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 556    library search path.  */
 557
 558 static void
 559 set_default_dirlist (dirlist_ptr)
 560      char *dirlist_ptr;
 561 {
 562   char *p;
 563
 564   while (1)
 565     {
 566       p = strchr (dirlist_ptr, ':');
 567       if (p != NULL)
 568         *p = 0;
 569       if (*dirlist_ptr)
 570         ldfile_add_library_path (dirlist_ptr, true);
 571       if (p == NULL)
 572         break;
 573       *p = ':';
 574       dirlist_ptr = p + 1;
 575     }
 576 }
 577
 578 static void
 579 set_section_start (sect, valstr)
 580      char *sect, *valstr;
 581 {
 582   char *end;
 583   unsigned long val = strtoul (valstr, &end, 16);
 584   if (*end)
 585     einfo ("%P%F: invalid hex number `%s'\n", valstr);
 586   lang_section_start (sect, exp_intop (val));
 587 }
 588 \f