ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright (C) 1991, 92, 93, 94 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include "bfd.h"
  21 #include "sysdep.h"
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include "getopt.h"
  25 #include "bfdlink.h"
  26 #include "config.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
  37 /* Somewhere above, sys/stat.h got included . . . . */
  38 #if !defined(S_ISDIR) && defined(S_IFDIR)
  39 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  40 #endif
  41
  42 /* Omit args to avoid the possibility of clashing with a system header
  43    that might disagree about consts.  */
  44 unsigned long strtoul ();
  45
  46 static void set_default_dirlist PARAMS ((char *dirlist_ptr));
  47 static void set_section_start PARAMS ((char *sect, char *valstr));
  48
  49 /* WINDOWS_NT; declare additional functions */
  50 static void set_subsystem PARAMS ((char *subsystem_type));
  51 static void set_stack_heap PARAMS ((char *valstr, boolean for_heap));
  52
  53 void
  54 parse_args (argc, argv)
  55      int argc;
  56      char **argv;
  57 {
  58   int ingroup = 0;
  59
  60   /* Starting the short option string with '-' is for programs that
  61      expect options and other ARGV-elements in any order and that care about
  62      the ordering of the two.  We describe each non-option ARGV-element
  63      as if it were the argument of an option with character code 1.  */
  64
  65   const char *shortopts =
  66     "-a:A:B::b:c:de:F::G:giL:l:Mm:NnO:o:R:rSsT:tu:VvXxY:y:()";
  67
  68   /* 150 isn't special; it's just an arbitrary non-ASCII char value.  */
  69
  70 #define OPTION_CALL_SHARED              150
  71 #define OPTION_DEFSYM                   (OPTION_CALL_SHARED + 1)
  72 #define OPTION_DYNAMIC_LINKER           (OPTION_DEFSYM + 1)
  73 #define OPTION_EB                       (OPTION_DYNAMIC_LINKER + 1)
  74 #define OPTION_EL                       (OPTION_EB + 1)
  75 #define OPTION_HEAP                     (OPTION_EL + 1)
  76 #define OPTION_EMBEDDED_RELOCS          (OPTION_HEAP + 1)
  77 #define OPTION_EXPORT_DYNAMIC           (OPTION_EMBEDDED_RELOCS + 1)
  78 #define OPTION_HELP                     (OPTION_EXPORT_DYNAMIC + 1)
  79 #define OPTION_IGNORE                   (OPTION_HELP + 1)
  80 #define OPTION_MAP                      (OPTION_IGNORE + 1)
  81 #define OPTION_NO_KEEP_MEMORY           (OPTION_MAP + 1)
  82 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_KEEP_MEMORY + 1)
  83 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  84 #define OPTION_OFORMAT                  (OPTION_NON_SHARED + 1)
  85 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  86 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  87 #define OPTION_RPATH                    (OPTION_RETAIN_SYMBOLS_FILE + 1)
  88 #define OPTION_SHARED                   (OPTION_RPATH + 1)
  89 #define OPTION_SONAME                   (OPTION_SHARED + 1)
  90 #define OPTION_SORT_COMMON              (OPTION_SONAME + 1)
  91 #define OPTION_STACK                    (OPTION_SORT_COMMON + 1) /*WINDOWS_NT*/
  92 #define OPTION_STATS                    (OPTION_STACK + 1)
  93 #define OPTION_SUBSYSTEM                (OPTION_STATS + 1) /* WINDOWS_NT */
  94 #define OPTION_TBSS                     (OPTION_SUBSYSTEM + 1)
  95 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  96 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
  97 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
  98 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
  99 #define OPTION_VERBOSE                  (OPTION_UR + 1)
 100 #define OPTION_VERSION                  (OPTION_VERBOSE + 1)
 101 #define OPTION_WARN_COMMON              (OPTION_VERSION + 1)
 102 #define OPTION_WARN_ONCE                (OPTION_WARN_COMMON + 1)
 103 #define OPTION_SPLIT_BY_RELOC           (OPTION_WARN_ONCE + 1)
 104 #define OPTION_SPLIT_BY_FILE            (OPTION_SPLIT_BY_RELOC + 1)
 105 #define OPTION_WHOLE_ARCHIVE            (OPTION_SPLIT_BY_FILE + 1)
 106 #define OPTION_BASE_FILE                (OPTION_WHOLE_ARCHIVE + 1)
 107   static struct option longopts[] = {
 108     {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 109     {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 110     {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 111     {"dc", no_argument, NULL, 'd'},
 112     {"defsym", required_argument, NULL, OPTION_DEFSYM},
 113     {"dll-verbose", no_argument, NULL, OPTION_VERSION}, /* Linux.  */
 114     {"dn", no_argument, NULL, OPTION_NON_SHARED},
 115     {"dp", no_argument, NULL, 'd'},
 116     {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 117     {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 118     {"EB", no_argument, NULL, OPTION_EB},
 119     {"EL", no_argument, NULL, OPTION_EL},
 120     {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 121     {"end-group", no_argument, NULL, ')'},
 122     {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 123     {"format", required_argument, NULL, 'b'},
 124     {"heap", required_argument, NULL, OPTION_HEAP}, /* WINDOWS_NT */
 125     {"help", no_argument, NULL, OPTION_HELP},
 126     {"Map", required_argument, NULL, OPTION_MAP},
 127     {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 128     {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 129     {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 130     {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 131     {"oformat", required_argument, NULL, OPTION_OFORMAT},
 132     {"Qy", no_argument, NULL, OPTION_IGNORE},
 133     {"qmagic", no_argument, NULL, OPTION_IGNORE}, /* Linux compatibility.  */
 134     {"relax", no_argument, NULL, OPTION_RELAX},
 135     {"retain-symbols-file", required_argument, NULL, OPTION_RETAIN_SYMBOLS_FILE},
 136     {"rpath", required_argument, NULL, OPTION_RPATH},
 137     {"shared", no_argument, NULL, OPTION_SHARED},
 138     {"soname", required_argument, NULL, OPTION_SONAME},
 139     {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 140     {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 141     {"stack", required_argument, NULL, OPTION_STACK}, /* WINDOWS_NT */
 142     {"start-group", no_argument, NULL, '('},
 143     {"stats", no_argument, NULL, OPTION_STATS},
 144     {"static", no_argument, NULL, OPTION_NON_SHARED},
 145     {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM}, /* WINDOWS_NT */
 146     {"Tbss", required_argument, NULL, OPTION_TBSS},
 147     {"Tdata", required_argument, NULL, OPTION_TDATA},
 148     {"Ttext", required_argument, NULL, OPTION_TTEXT},
 149     {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 150     {"Ur", no_argument, NULL, OPTION_UR},
 151     {"verbose", no_argument, NULL, OPTION_VERBOSE},
 152     {"version", no_argument, NULL, OPTION_VERSION},
 153     {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 154     {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 155     {"split-by-reloc", required_argument, NULL, OPTION_SPLIT_BY_RELOC},
 156     {"split-by-file", no_argument, NULL, OPTION_SPLIT_BY_FILE},
 157     {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 158     {"base-file", required_argument, NULL, OPTION_BASE_FILE},
 159     {NULL, no_argument, NULL, 0}
 160   };
 161
 162   while (1)
 163     {
 164       /* getopt_long_only is like getopt_long, but '-' as well as '--' can
 165          indicate a long option.  */
 166       int longind;
 167       int optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 168
 169       if (optc == -1)
 170         break;
 171
 172       switch (optc)
 173         {
 174         default:
 175           xexit (1);
 176         case 1:                 /* File name.  */
 177           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 178                                (char *) NULL);
 179           break;
 180
 181         case OPTION_IGNORE:
 182           break;
 183         case 'a':
 184           /* For HP/UX compatibility.  Actually -a shared should mean
 185              ``use only shared libraries'' but, then, we don't
 186              currently support shared libraries on HP/UX anyhow.  */
 187           if (strcmp (optarg, "archive") == 0)
 188             config.dynamic_link = false;
 189           else if (strcmp (optarg, "shared") == 0
 190                    || strcmp (optarg, "default") == 0)
 191             config.dynamic_link = true;
 192           else
 193             einfo ("%P%F: unrecognized -a option `%s'\n", optarg);
 194           break;
 195         case 'A':
 196           ldfile_add_arch (optarg);
 197           break;
 198         case 'b':
 199           lang_add_target (optarg);
 200           break;
 201         case 'c':
 202           ldfile_open_command_file (optarg);
 203           parser_input = input_mri_script;
 204           yyparse ();
 205           break;
 206         case OPTION_CALL_SHARED:
 207           config.dynamic_link = true;
 208           break;
 209         case OPTION_NON_SHARED:
 210           config.dynamic_link = false;
 211           break;
 212         case 'd':
 213           command_line.force_common_definition = true;
 214           break;
 215         case OPTION_DEFSYM:
 216           lex_redirect (optarg);
 217           parser_input = input_defsym;
 218           yyparse ();
 219           break;
 220         case OPTION_DYNAMIC_LINKER:
 221           command_line.interpreter = optarg;
 222           break;
 223         case OPTION_EB:
 224           command_line.endian = ENDIAN_BIG;
 225           break;
 226         case OPTION_EL:
 227           command_line.endian = ENDIAN_LITTLE;
 228           break;
 229         case OPTION_EMBEDDED_RELOCS:
 230           command_line.embedded_relocs = true;
 231           break;
 232         case OPTION_EXPORT_DYNAMIC:
 233           command_line.export_dynamic = true;
 234           break;
 235         case 'e':
 236           lang_add_entry (optarg, 1);
 237           break;
 238         case 'F':
 239           /* Ignore.  */
 240           break;
 241         case 'G':
 242           {
 243             char *end;
 244             g_switch_value = strtoul (optarg, &end, 0);
 245             if (*end)
 246               einfo ("%P%F: invalid number `%s'\n", optarg);
 247           }
 248           break;
 249         case 'g':
 250           /* Ignore.  */
 251           break;
 252         case OPTION_HEAP:  /* WINDOWS_NT */
 253           link_info.stack_heap_parameters.heap_defined = true;
 254           set_stack_heap (optarg, true);
 255           break;
 256         case OPTION_HELP:
 257           help ();
 258           xexit (0);
 259           break;
 260         case 'L':
 261           ldfile_add_library_path (optarg, true);
 262           break;
 263         case 'l':
 264           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 265                                (char *) NULL);
 266           break;
 267         case 'M':
 268           config.map_filename = "-";
 269           break;
 270         case 'm':
 271           /* Ignore.  Was handled in a pre-parse.   */
 272           break;
 273         case OPTION_MAP:
 274           config.map_filename = optarg;
 275           break;
 276         case 'N':
 277           config.text_read_only = false;
 278           config.magic_demand_paged = false;
 279           break;
 280         case 'n':
 281           config.magic_demand_paged = false;
 282           break;
 283         case OPTION_NO_KEEP_MEMORY:
 284           link_info.keep_memory = false;
 285           break;
 286         case OPTION_NOINHIBIT_EXEC:
 287           force_make_executable = true;
 288           break;
 289         case 'O':
 290           /* FIXME "-O<non-digits> <value>" used to set the address of
 291              section <non-digits>.  Was this for compatibility with
 292              something, or can we create a new option to do that
 293              (with a syntax similar to -defsym)?
 294              getopt can't handle two args to an option without kludges.  */
 295           set_default_dirlist (optarg);
 296           break;
 297         case 'o':
 298           lang_add_output (optarg, 0);
 299           break;
 300         case OPTION_OFORMAT:
 301           lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
 302           break;
 303         case 'i':
 304         case 'r':
 305           link_info.relocateable = true;
 306           config.build_constructors = false;
 307           config.magic_demand_paged = false;
 308           config.text_read_only = false;
 309           config.dynamic_link = false;
 310           break;
 311         case 'R':
 312           /* The GNU linker traditionally uses -R to mean to include
 313              only the symbols from a file.  The Solaris linker uses -R
 314              to set the path used by the runtime linker to find
 315              libraries.  This is the GNU linker -rpath argument.  We
 316              try to support both simultaneously by checking the file
 317              named.  If it is a directory, rather than a regular file,
 318              we assume -rpath was meant.  */
 319           {
 320             struct stat s;
 321
 322             if (stat (optarg, &s) >= 0
 323                 && ! S_ISDIR (s.st_mode))
 324               {
 325                 lang_add_input_file (optarg,
 326                                      lang_input_file_is_symbols_only_enum,
 327                                      (char *) NULL);
 328                 break;
 329               }
 330           }
 331           /* Fall through.  */
 332         case OPTION_RPATH:
 333           if (command_line.rpath == NULL)
 334             command_line.rpath = buystring (optarg);
 335           else
 336             {
 337               char *buf;
 338
 339               buf = xmalloc (strlen (command_line.rpath)
 340                              + strlen (optarg)
 341                              + 2);
 342               sprintf (buf, "%s:%s", command_line.rpath, optarg);
 343               free (command_line.rpath);
 344               command_line.rpath = buf;
 345             }
 346           break;
 347         case OPTION_RELAX:
 348           command_line.relax = true;
 349           break;
 350         case OPTION_RETAIN_SYMBOLS_FILE:
 351           add_keepsyms_file (optarg);
 352           break;
 353         case 'S':
 354           link_info.strip = strip_debugger;
 355           break;
 356         case 's':
 357           link_info.strip = strip_all;
 358           break;
 359         case OPTION_SHARED:
 360           link_info.shared = true;
 361           break;
 362         case OPTION_SONAME:
 363           command_line.soname = optarg;
 364           break;
 365         case OPTION_SORT_COMMON:
 366           config.sort_common = true;
 367           break;
 368         case OPTION_STACK:  /* WINDOWS_NT */
 369           link_info.stack_heap_parameters.stack_defined = true;
 370           set_stack_heap (optarg, false);
 371           break;
 372         case OPTION_STATS:
 373           config.stats = true;
 374           break;
 375         case OPTION_SUBSYSTEM:  /* WINDOWS_NT */
 376           set_subsystem (optarg);
 377           break;
 378         case 't':
 379           trace_files = true;
 380           break;
 381         case 'T':
 382           ldfile_open_command_file (optarg);
 383           parser_input = input_script;
 384           yyparse ();
 385           break;
 386         case OPTION_TBSS:
 387           set_section_start (".bss", optarg);
 388           break;
 389         case OPTION_TDATA:
 390           set_section_start (".data", optarg);
 391           break;
 392         case OPTION_TTEXT:
 393           set_section_start (".text", optarg);
 394           break;
 395         case OPTION_TRADITIONAL_FORMAT:
 396           config.traditional_format = true;
 397           break;
 398         case OPTION_UR:
 399           link_info.relocateable = true;
 400           config.build_constructors = true;
 401           config.magic_demand_paged = false;
 402           config.text_read_only = false;
 403           config.dynamic_link = false;
 404           break;
 405         case 'u':
 406           ldlang_add_undef (optarg);
 407           break;
 408         case OPTION_VERBOSE:
 409           ldversion (1);
 410           version_printed = true;
 411           trace_file_tries = true;
 412           break;
 413         case 'v':
 414           ldversion (0);
 415           version_printed = true;
 416           break;
 417         case 'V':
 418           ldversion (1);
 419           version_printed = true;
 420           break;
 421         case OPTION_VERSION:
 422           ldversion (0);
 423           version_printed = true;
 424           break;
 425         case OPTION_WARN_COMMON:
 426           config.warn_common = true;
 427           break;
 428         case OPTION_WARN_ONCE:
 429           config.warn_once = true;
 430           break;
 431         case OPTION_WHOLE_ARCHIVE:
 432           whole_archive = true;
 433           break;
 434         case OPTION_BASE_FILE:
 435           link_info.base_file = (PTR) fopen (optarg,"w");
 436           if (link_info.base_file == NULL)
 437             {
 438               fprintf (stderr, "%s: Can't open base file %s\n",
 439                        program_name, optarg);
 440               xexit (1);
 441             }
 442           break;
 443         case 'X':
 444           link_info.discard = discard_l;
 445           break;
 446         case 'x':
 447           link_info.discard = discard_all;
 448           break;
 449         case 'Y':
 450           set_default_dirlist (optarg);
 451           break;
 452         case 'y':
 453           add_ysym (optarg);
 454           break;
 455         case OPTION_SPLIT_BY_RELOC:
 456           config.split_by_reloc = atoi (optarg);
 457           break;
 458         case OPTION_SPLIT_BY_FILE:
 459           config.split_by_file = true;
 460           break;
 461         case '(':
 462           if (ingroup)
 463             {
 464               fprintf (stderr,
 465                        "%s: may not nest groups (--help for usage)\n",
 466                        program_name);
 467               xexit (1);
 468             }
 469           lang_enter_group ();
 470           ingroup = 1;
 471           break;
 472         case ')':
 473           if (! ingroup)
 474             {
 475               fprintf (stderr,
 476                        "%s: group ended before it began (--help for usage)\n",
 477                        program_name);
 478               xexit (1);
 479             }
 480           lang_leave_group ();
 481           ingroup = 0;
 482           break;
 483         }
 484     }
 485
 486   if (ingroup)
 487     lang_leave_group ();
 488 }
 489
 490 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 491    library search path.  */
 492
 493 static void
 494 set_default_dirlist (dirlist_ptr)
 495      char *dirlist_ptr;
 496 {
 497   char *p;
 498
 499   while (1)
 500     {
 501       p = strchr (dirlist_ptr, ':');
 502       if (p != NULL)
 503         *p = 0;
 504       if (*dirlist_ptr)
 505         ldfile_add_library_path (dirlist_ptr, true);
 506       if (p == NULL)
 507         break;
 508       *p = ':';
 509       dirlist_ptr = p + 1;
 510     }
 511 }
 512
 513 static void
 514 set_section_start (sect, valstr)
 515      char *sect, *valstr;
 516 {
 517   char *end;
 518   unsigned long val = strtoul (valstr, &end, 16);
 519   if (*end)
 520     einfo ("%P%F: invalid hex number `%s'\n", valstr);
 521   lang_section_start (sect, exp_intop (val));
 522 }
 523
 524 /* WINDOWS_NT; added routines to get the subsystem type, heap and/or stack
 525    parameters which may be input from the command line */
 526 static void
 527 set_subsystem (subsystem_type)
 528   char *subsystem_type;
 529 {
 530   if (strcmp (subsystem_type, "native") == 0)
 531     {
 532       link_info.subsystem = native;
 533     }
 534   else if (strcmp (subsystem_type, "windows") == 0)
 535     {
 536       link_info.subsystem = windows;
 537     }
 538   else if (strcmp (subsystem_type, "console") == 0)
 539     {
 540       link_info.subsystem = console;
 541     }
 542   else if (strcmp (subsystem_type, "os2") == 0)
 543     {
 544       link_info.subsystem = os2;
 545     }
 546   else if (strcmp (subsystem_type, "posix") == 0)
 547     {
 548       link_info.subsystem = posix;
 549     }
 550   else
 551     einfo ("%P%F: invalid subsystem type `%s'\n", subsystem_type);
 552
 553 }
 554
 555 static void
 556 set_stack_heap (valstr, for_heap)
 557   char *valstr;
 558   boolean for_heap;
 559 {
 560   char *begin_commit, *end;
 561   bfd_vma reserve = 0;
 562   bfd_vma commit  = 0;
 563
 564   /* There may be two values passed in to the -stack or -heap switches like
 565      this:
 566        -stack 0x10000,0x100
 567      where the first parameter is the stack (or heap) reserve and the second
 568      is commit.  The second parameter is optional. */
 569
 570   /* get the reserve value */
 571   reserve = strtoul (valstr, &begin_commit, 16);
 572
 573   if (strcmp (valstr, begin_commit) == 0)
 574     /* the reserve value couldn't be read */
 575     einfo ("%P%F: invalid hex number for reserve[,commit] '%s'\n", valstr);
 576   else if (strcmp (begin_commit, "\0") != 0)  /* check for a commit value */
 577     {
 578      begin_commit += 1;  /* increment begin_commit to point past ',' */
 579      commit = strtoul (begin_commit, &end, 16);
 580      if (strcmp (end, begin_commit) == 0)
 581        einfo ("%P%F: invalid hex number for commit '%s'\n", begin_commit);
 582     }
 583
 584   if (for_heap)
 585    {
 586     link_info.stack_heap_parameters.heap_reserve = reserve;
 587     link_info.stack_heap_parameters.heap_commit  = commit;
 588    }
 589   else
 590    {
 591     link_info.stack_heap_parameters.stack_reserve = reserve;
 592     link_info.stack_heap_parameters.stack_commit  = commit;
 593    }
 594
 595 #if DUMP_INFO
 596   printf ("reserve = %8x  commit = %8x\n", reserve, commit);
 597 #endif
 598 }