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 "config.h"
  28 #include "ld.h"
  29 #include "ldmain.h"
  30 #include "ldmisc.h"
  31 #include "ldexp.h"
  32 #include "ldlang.h"
  33 #include "ldgram.h"
  34 #include "ldlex.h"
  35 #include "ldfile.h"
  36 #include "ldver.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 /* WINDOWS_NT; declare additional functions */
  51 static void set_subsystem PARAMS ((char *subsystem_type));
  52 static void set_stack_heap PARAMS ((char *valstr, boolean for_heap));
  53
  54 void
  55 parse_args (argc, argv)
  56      int argc;
  57      char **argv;
  58 {
  59   int i;
  60   int ingroup = 0;
  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::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_CALL_SHARED              150
  73 #define OPTION_DEFSYM                   (OPTION_CALL_SHARED + 1)
  74 #define OPTION_DYNAMIC_LINKER           (OPTION_DEFSYM + 1)
  75 #define OPTION_EB                       (OPTION_DYNAMIC_LINKER + 1)
  76 #define OPTION_EL                       (OPTION_EB + 1)
  77 #define OPTION_HEAP                     (OPTION_EL + 1)
  78 #define OPTION_EMBEDDED_RELOCS          (OPTION_HEAP + 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_OFORMAT                  (OPTION_NON_SHARED + 1)
  87 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  88 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  89 #define OPTION_RPATH                    (OPTION_RETAIN_SYMBOLS_FILE + 1)
  90 #define OPTION_SHARED                   (OPTION_RPATH + 1)
  91 #define OPTION_SONAME                   (OPTION_SHARED + 1)
  92 #define OPTION_SORT_COMMON              (OPTION_SONAME + 1)
  93 #define OPTION_STACK                    (OPTION_SORT_COMMON + 1) /*WINDOWS_NT*/
  94 #define OPTION_STATS                    (OPTION_STACK + 1)
  95 #define OPTION_SUBSYSTEM                (OPTION_STATS + 1) /* WINDOWS_NT */
  96 #define OPTION_SYMBOLIC                 (OPTION_SUBSYSTEM + 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 #define OPTION_BASE_FILE                (OPTION_WHOLE_ARCHIVE + 1)
 111   static struct option longopts[] = {
 112     {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 113     {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 114     {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 115     {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 116     {"dc", no_argument, NULL, 'd'},
 117     {"defsym", required_argument, NULL, OPTION_DEFSYM},
 118     {"dll-verbose", no_argument, NULL, OPTION_VERSION}, /* Linux.  */
 119     {"dn", no_argument, NULL, OPTION_NON_SHARED},
 120     {"dp", no_argument, NULL, 'd'},
 121     {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 122     {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 123     {"EB", no_argument, NULL, OPTION_EB},
 124     {"EL", no_argument, NULL, OPTION_EL},
 125     {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 126     {"end-group", no_argument, NULL, ')'},
 127     {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 128     {"format", required_argument, NULL, 'b'},
 129     {"heap", required_argument, NULL, OPTION_HEAP}, /* WINDOWS_NT */
 130     {"help", no_argument, NULL, OPTION_HELP},
 131     {"Map", required_argument, NULL, OPTION_MAP},
 132     {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 133     {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 134     {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 135     {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 136     {"oformat", required_argument, NULL, OPTION_OFORMAT},
 137     {"Qy", no_argument, NULL, OPTION_IGNORE},
 138     {"qmagic", no_argument, NULL, OPTION_IGNORE}, /* Linux compatibility.  */
 139     {"relax", no_argument, NULL, OPTION_RELAX},
 140     {"retain-symbols-file", required_argument, NULL, OPTION_RETAIN_SYMBOLS_FILE},
 141     {"rpath", required_argument, NULL, OPTION_RPATH},
 142     {"shared", no_argument, NULL, OPTION_SHARED},
 143     {"soname", required_argument, NULL, OPTION_SONAME},
 144     {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 145     {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 146     {"stack", required_argument, NULL, OPTION_STACK}, /* WINDOWS_NT */
 147     {"start-group", no_argument, NULL, '('},
 148     {"stats", no_argument, NULL, OPTION_STATS},
 149     {"static", no_argument, NULL, OPTION_NON_SHARED},
 150     {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM}, /* WINDOWS_NT */
 151     {"Tbss", required_argument, NULL, OPTION_TBSS},
 152     {"Tdata", required_argument, NULL, OPTION_TDATA},
 153     {"Ttext", required_argument, NULL, OPTION_TTEXT},
 154     {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 155     {"Ur", no_argument, NULL, OPTION_UR},
 156     {"verbose", no_argument, NULL, OPTION_VERBOSE},
 157     {"version", no_argument, NULL, OPTION_VERSION},
 158     {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 159     {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 160     {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 161     {"split-by-reloc", required_argument, NULL, OPTION_SPLIT_BY_RELOC},
 162     {"split-by-file", no_argument, NULL, OPTION_SPLIT_BY_FILE},
 163     {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 164     {"base-file", required_argument, NULL, OPTION_BASE_FILE},
 165     {NULL, no_argument, NULL, 0}
 166   };
 167
 168   /* The -G option is ambiguous on different platforms.  Sometimes it
 169      specifies the largest data size to put into the small data
 170      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 171      the first form takes an argument, while the second does not.
 172
 173      We need to permit the --shared form because on some platforms,
 174      such as Solaris, gcc -shared will pass -G to the linker.
 175
 176      To permit either usage, we look through the argument list.  If we
 177      find -G not followed by a number, we change it into --shared.
 178      This will work for most normal cases.  */
 179   for (i = 1; i < argc; i++)
 180     if (strcmp (argv[i], "-G") == 0
 181         && (i + 1 >= argc
 182             || ! isdigit (argv[i + 1][0])))
 183       argv[i] = (char *) "--shared";
 184
 185   while (1)
 186     {
 187       /* getopt_long_only is like getopt_long, but '-' as well as '--' can
 188          indicate a long option.  */
 189       int longind;
 190       int optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 191
 192       if (optc == -1)
 193         break;
 194
 195       switch (optc)
 196         {
 197         default:
 198           xexit (1);
 199         case 1:                 /* File name.  */
 200           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 201                                (char *) NULL);
 202           break;
 203
 204         case OPTION_IGNORE:
 205           break;
 206         case 'a':
 207           /* For HP/UX compatibility.  Actually -a shared should mean
 208              ``use only shared libraries'' but, then, we don't
 209              currently support shared libraries on HP/UX anyhow.  */
 210           if (strcmp (optarg, "archive") == 0)
 211             config.dynamic_link = false;
 212           else if (strcmp (optarg, "shared") == 0
 213                    || strcmp (optarg, "default") == 0)
 214             config.dynamic_link = true;
 215           else
 216             einfo ("%P%F: unrecognized -a option `%s'\n", optarg);
 217           break;
 218         case 'A':
 219           ldfile_add_arch (optarg);
 220           break;
 221         case 'b':
 222           lang_add_target (optarg);
 223           break;
 224         case 'c':
 225           ldfile_open_command_file (optarg);
 226           parser_input = input_mri_script;
 227           yyparse ();
 228           break;
 229         case OPTION_CALL_SHARED:
 230           config.dynamic_link = true;
 231           break;
 232         case OPTION_NON_SHARED:
 233           config.dynamic_link = false;
 234           break;
 235         case 'd':
 236           command_line.force_common_definition = true;
 237           break;
 238         case OPTION_DEFSYM:
 239           lex_redirect (optarg);
 240           parser_input = input_defsym;
 241           yyparse ();
 242           break;
 243         case OPTION_DYNAMIC_LINKER:
 244           command_line.interpreter = optarg;
 245           break;
 246         case OPTION_EB:
 247           command_line.endian = ENDIAN_BIG;
 248           break;
 249         case OPTION_EL:
 250           command_line.endian = ENDIAN_LITTLE;
 251           break;
 252         case OPTION_EMBEDDED_RELOCS:
 253           command_line.embedded_relocs = true;
 254           break;
 255         case OPTION_EXPORT_DYNAMIC:
 256           command_line.export_dynamic = true;
 257           break;
 258         case 'e':
 259           lang_add_entry (optarg, 1);
 260           break;
 261         case 'F':
 262           /* Ignore.  */
 263           break;
 264         case 'G':
 265           {
 266             char *end;
 267             g_switch_value = strtoul (optarg, &end, 0);
 268             if (*end)
 269               einfo ("%P%F: invalid number `%s'\n", optarg);
 270           }
 271           break;
 272         case 'g':
 273           /* Ignore.  */
 274           break;
 275         case OPTION_HEAP:  /* WINDOWS_NT */
 276           link_info.stack_heap_parameters.heap_defined = true;
 277           set_stack_heap (optarg, true);
 278           break;
 279         case OPTION_HELP:
 280           help ();
 281           xexit (0);
 282           break;
 283         case 'L':
 284           ldfile_add_library_path (optarg, true);
 285           break;
 286         case 'l':
 287           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 288                                (char *) NULL);
 289           break;
 290         case 'M':
 291           config.map_filename = "-";
 292           break;
 293         case 'm':
 294           /* Ignore.  Was handled in a pre-parse.   */
 295           break;
 296         case OPTION_MAP:
 297           config.map_filename = optarg;
 298           break;
 299         case 'N':
 300           config.text_read_only = false;
 301           config.magic_demand_paged = false;
 302           break;
 303         case 'n':
 304           config.magic_demand_paged = false;
 305           break;
 306         case OPTION_NO_KEEP_MEMORY:
 307           link_info.keep_memory = false;
 308           break;
 309         case OPTION_NOINHIBIT_EXEC:
 310           force_make_executable = true;
 311           break;
 312         case 'O':
 313           /* FIXME "-O<non-digits> <value>" used to set the address of
 314              section <non-digits>.  Was this for compatibility with
 315              something, or can we create a new option to do that
 316              (with a syntax similar to -defsym)?
 317              getopt can't handle two args to an option without kludges.  */
 318           set_default_dirlist (optarg);
 319           break;
 320         case 'o':
 321           lang_add_output (optarg, 0);
 322           break;
 323         case OPTION_OFORMAT:
 324           lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
 325           break;
 326         case 'i':
 327         case 'r':
 328           link_info.relocateable = true;
 329           config.build_constructors = false;
 330           config.magic_demand_paged = false;
 331           config.text_read_only = false;
 332           config.dynamic_link = false;
 333           break;
 334         case 'R':
 335           /* The GNU linker traditionally uses -R to mean to include
 336              only the symbols from a file.  The Solaris linker uses -R
 337              to set the path used by the runtime linker to find
 338              libraries.  This is the GNU linker -rpath argument.  We
 339              try to support both simultaneously by checking the file
 340              named.  If it is a directory, rather than a regular file,
 341              we assume -rpath was meant.  */
 342           {
 343             struct stat s;
 344
 345             if (stat (optarg, &s) >= 0
 346                 && ! S_ISDIR (s.st_mode))
 347               {
 348                 lang_add_input_file (optarg,
 349                                      lang_input_file_is_symbols_only_enum,
 350                                      (char *) NULL);
 351                 break;
 352               }
 353           }
 354           /* Fall through.  */
 355         case OPTION_RPATH:
 356           if (command_line.rpath == NULL)
 357             command_line.rpath = buystring (optarg);
 358           else
 359             {
 360               char *buf;
 361
 362               buf = xmalloc (strlen (command_line.rpath)
 363                              + strlen (optarg)
 364                              + 2);
 365               sprintf (buf, "%s:%s", command_line.rpath, optarg);
 366               free (command_line.rpath);
 367               command_line.rpath = buf;
 368             }
 369           break;
 370         case OPTION_RELAX:
 371           command_line.relax = true;
 372           break;
 373         case OPTION_RETAIN_SYMBOLS_FILE:
 374           add_keepsyms_file (optarg);
 375           break;
 376         case 'S':
 377           link_info.strip = strip_debugger;
 378           break;
 379         case 's':
 380           link_info.strip = strip_all;
 381           break;
 382         case OPTION_SHARED:
 383           link_info.shared = true;
 384           break;
 385         case 'h': /* Used on Solaris.  */
 386         case OPTION_SONAME:
 387           command_line.soname = optarg;
 388           break;
 389         case OPTION_SORT_COMMON:
 390           config.sort_common = true;
 391           break;
 392         case OPTION_STACK:  /* WINDOWS_NT */
 393           link_info.stack_heap_parameters.stack_defined = true;
 394           set_stack_heap (optarg, false);
 395           break;
 396         case OPTION_STATS:
 397           config.stats = true;
 398           break;
 399         case OPTION_SUBSYSTEM:  /* WINDOWS_NT */
 400           set_subsystem (optarg);
 401           break;
 402         case OPTION_SYMBOLIC:
 403           link_info.symbolic = true;
 404           break;
 405         case 't':
 406           trace_files = true;
 407           break;
 408         case 'T':
 409           ldfile_open_command_file (optarg);
 410           parser_input = input_script;
 411           yyparse ();
 412           break;
 413         case OPTION_TBSS:
 414           set_section_start (".bss", optarg);
 415           break;
 416         case OPTION_TDATA:
 417           set_section_start (".data", optarg);
 418           break;
 419         case OPTION_TTEXT:
 420           set_section_start (".text", optarg);
 421           break;
 422         case OPTION_TRADITIONAL_FORMAT:
 423           config.traditional_format = true;
 424           break;
 425         case OPTION_UR:
 426           link_info.relocateable = true;
 427           config.build_constructors = true;
 428           config.magic_demand_paged = false;
 429           config.text_read_only = false;
 430           config.dynamic_link = false;
 431           break;
 432         case 'u':
 433           ldlang_add_undef (optarg);
 434           break;
 435         case OPTION_VERBOSE:
 436           ldversion (1);
 437           version_printed = true;
 438           trace_file_tries = true;
 439           break;
 440         case 'v':
 441           ldversion (0);
 442           version_printed = true;
 443           break;
 444         case 'V':
 445           ldversion (1);
 446           version_printed = true;
 447           break;
 448         case OPTION_VERSION:
 449           ldversion (0);
 450           version_printed = true;
 451           break;
 452         case OPTION_WARN_COMMON:
 453           config.warn_common = true;
 454           break;
 455         case OPTION_WARN_CONSTRUCTORS:
 456           config.warn_constructors = true;
 457           break;
 458         case OPTION_WARN_ONCE:
 459           config.warn_once = true;
 460           break;
 461         case OPTION_WHOLE_ARCHIVE:
 462           whole_archive = true;
 463           break;
 464         case OPTION_BASE_FILE:
 465           link_info.base_file = (PTR) fopen (optarg,"w");
 466           if (link_info.base_file == NULL)
 467             {
 468               fprintf (stderr, "%s: Can't open base file %s\n",
 469                        program_name, optarg);
 470               xexit (1);
 471             }
 472           break;
 473         case 'X':
 474           link_info.discard = discard_l;
 475           break;
 476         case 'x':
 477           link_info.discard = discard_all;
 478           break;
 479         case 'Y':
 480           set_default_dirlist (optarg);
 481           break;
 482         case 'y':
 483           add_ysym (optarg);
 484           break;
 485         case 'z':
 486           /* We accept and ignore this option for Solaris
 487              compatibility.  Actually, on Solaris, optarg is not
 488              ignored.  Someday we should handle it correctly.  FIXME.  */
 489           break;
 490         case OPTION_SPLIT_BY_RELOC:
 491           config.split_by_reloc = atoi (optarg);
 492           break;
 493         case OPTION_SPLIT_BY_FILE:
 494           config.split_by_file = true;
 495           break;
 496         case '(':
 497           if (ingroup)
 498             {
 499               fprintf (stderr,
 500                        "%s: may not nest groups (--help for usage)\n",
 501                        program_name);
 502               xexit (1);
 503             }
 504           lang_enter_group ();
 505           ingroup = 1;
 506           break;
 507         case ')':
 508           if (! ingroup)
 509             {
 510               fprintf (stderr,
 511                        "%s: group ended before it began (--help for usage)\n",
 512                        program_name);
 513               xexit (1);
 514             }
 515           lang_leave_group ();
 516           ingroup = 0;
 517           break;
 518         }
 519     }
 520
 521   if (ingroup)
 522     lang_leave_group ();
 523 }
 524
 525 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 526    library search path.  */
 527
 528 static void
 529 set_default_dirlist (dirlist_ptr)
 530      char *dirlist_ptr;
 531 {
 532   char *p;
 533
 534   while (1)
 535     {
 536       p = strchr (dirlist_ptr, ':');
 537       if (p != NULL)
 538         *p = 0;
 539       if (*dirlist_ptr)
 540         ldfile_add_library_path (dirlist_ptr, true);
 541       if (p == NULL)
 542         break;
 543       *p = ':';
 544       dirlist_ptr = p + 1;
 545     }
 546 }
 547
 548 static void
 549 set_section_start (sect, valstr)
 550      char *sect, *valstr;
 551 {
 552   char *end;
 553   unsigned long val = strtoul (valstr, &end, 16);
 554   if (*end)
 555     einfo ("%P%F: invalid hex number `%s'\n", valstr);
 556   lang_section_start (sect, exp_intop (val));
 557 }
 558
 559 /* WINDOWS_NT; added routines to get the subsystem type, heap and/or stack
 560    parameters which may be input from the command line */
 561 static void
 562 set_subsystem (subsystem_type)
 563   char *subsystem_type;
 564 {
 565   if (strcmp (subsystem_type, "native") == 0)
 566     {
 567       link_info.subsystem = native;
 568     }
 569   else if (strcmp (subsystem_type, "windows") == 0)
 570     {
 571       link_info.subsystem = windows;
 572     }
 573   else if (strcmp (subsystem_type, "console") == 0)
 574     {
 575       link_info.subsystem = console;
 576     }
 577   else if (strcmp (subsystem_type, "os2") == 0)
 578     {
 579       link_info.subsystem = os2;
 580     }
 581   else if (strcmp (subsystem_type, "posix") == 0)
 582     {
 583       link_info.subsystem = posix;
 584     }
 585   else
 586     einfo ("%P%F: invalid subsystem type `%s'\n", subsystem_type);
 587
 588 }
 589
 590 static void
 591 set_stack_heap (valstr, for_heap)
 592   char *valstr;
 593   boolean for_heap;
 594 {
 595   char *begin_commit, *end;
 596   bfd_vma reserve = 0;
 597   bfd_vma commit  = 0;
 598
 599   /* There may be two values passed in to the -stack or -heap switches like
 600      this:
 601        -stack 0x10000,0x100
 602      where the first parameter is the stack (or heap) reserve and the second
 603      is commit.  The second parameter is optional. */
 604
 605   /* get the reserve value */
 606   reserve = strtoul (valstr, &begin_commit, 16);
 607
 608   if (strcmp (valstr, begin_commit) == 0)
 609     /* the reserve value couldn't be read */
 610     einfo ("%P%F: invalid hex number for reserve[,commit] '%s'\n", valstr);
 611   else if (strcmp (begin_commit, "\0") != 0)  /* check for a commit value */
 612     {
 613      begin_commit += 1;  /* increment begin_commit to point past ',' */
 614      commit = strtoul (begin_commit, &end, 16);
 615      if (strcmp (end, begin_commit) == 0)
 616        einfo ("%P%F: invalid hex number for commit '%s'\n", begin_commit);
 617     }
 618
 619   if (for_heap)
 620    {
 621     link_info.stack_heap_parameters.heap_reserve = reserve;
 622     link_info.stack_heap_parameters.heap_commit  = commit;
 623    }
 624   else
 625    {
 626     link_info.stack_heap_parameters.stack_reserve = reserve;
 627     link_info.stack_heap_parameters.stack_commit  = commit;
 628    }
 629
 630 #if DUMP_INFO
 631   printf ("reserve = %8x  commit = %8x\n", reserve, commit);
 632 #endif
 633 }