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 /* Omit args to avoid the possibility of clashing with a system header
  38    that might disagree about consts.  */
  39 unsigned long strtoul ();
  40
  41 static void set_default_dirlist PARAMS ((char *dirlist_ptr));
  42 static void set_section_start PARAMS ((char *sect, char *valstr));
  43
  44 void
  45 parse_args (argc, argv)
  46      int argc;
  47      char **argv;
  48 {
  49   /* Starting the short option string with '-' is for programs that
  50      expect options and other ARGV-elements in any order and that care about
  51      the ordering of the two.  We describe each non-option ARGV-element
  52      as if it were the argument of an option with character code 1.  */
  53
  54   const char *shortopts = "-A:B::b:cde:F::G:giL:l:Mm:NnO:o:R:rSsT:tu:VvXxY:y:";
  55
  56   /* 150 isn't special; it's just an arbitrary non-ASCII char value.  */
  57
  58 #define OPTION_CALL_SHARED              150
  59 #define OPTION_DEFSYM                   (OPTION_CALL_SHARED + 1)
  60 #define OPTION_EB                       (OPTION_DEFSYM + 1)
  61 #define OPTION_EL                       (OPTION_EB + 1)
  62 #define OPTION_HELP                     (OPTION_EL + 1)
  63 #define OPTION_IGNORE                   (OPTION_HELP + 1)
  64 #define OPTION_MAP                      (OPTION_IGNORE + 1)
  65 #define OPTION_NO_KEEP_MEMORY           (OPTION_MAP + 1)
  66 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_KEEP_MEMORY + 1)
  67 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  68 #define OPTION_OFORMAT                  (OPTION_NON_SHARED + 1)
  69 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  70 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  71 #define OPTION_SORT_COMMON              (OPTION_RETAIN_SYMBOLS_FILE + 1)
  72 #define OPTION_STATS                    (OPTION_SORT_COMMON + 1)
  73 #define OPTION_TBSS                     (OPTION_STATS + 1)
  74 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  75 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
  76 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
  77 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
  78 #define OPTION_VERSION                  (OPTION_UR + 1)
  79 #define OPTION_WARN_COMMON              (OPTION_VERSION + 1)
  80
  81   static struct option longopts[] = {
  82     {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
  83     {"dc", no_argument, NULL, 'd'},
  84     {"defsym", required_argument, NULL, OPTION_DEFSYM},
  85     {"dn", no_argument, NULL, OPTION_NON_SHARED},
  86     {"dp", no_argument, NULL, 'd'},
  87     {"dy", no_argument, NULL, OPTION_CALL_SHARED},
  88     {"EB", no_argument, NULL, OPTION_EB},
  89     {"EL", no_argument, NULL, OPTION_EL},
  90     {"format", required_argument, NULL, 'b'},
  91     {"help", no_argument, NULL, OPTION_HELP},
  92     {"Map", required_argument, NULL, OPTION_MAP},
  93     {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
  94     {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
  95     {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
  96     {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
  97     {"oformat", required_argument, NULL, OPTION_OFORMAT},
  98     {"Qy", no_argument, NULL, OPTION_IGNORE},
  99     {"relax", no_argument, NULL, OPTION_RELAX},
 100     {"retain-symbols-file", no_argument, NULL, OPTION_RETAIN_SYMBOLS_FILE},
 101     {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 102     {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 103     {"stats", no_argument, NULL, OPTION_STATS},
 104     {"Tbss", required_argument, NULL, OPTION_TBSS},
 105     {"Tdata", required_argument, NULL, OPTION_TDATA},
 106     {"Ttext", required_argument, NULL, OPTION_TTEXT},
 107     {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 108     {"Ur", no_argument, NULL, OPTION_UR},
 109     {"version", no_argument, NULL, OPTION_VERSION},
 110     {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 111     {NULL, no_argument, NULL, 0}
 112   };
 113
 114   while (1)
 115     {
 116       /* getopt_long_only is like getopt_long, but '-' as well as '--' can
 117          indicate a long option.  */
 118       int longind;
 119       int optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 120
 121       if (optc == -1)
 122         break;
 123
 124       switch (optc)
 125         {
 126         default:
 127           xexit (1);
 128         case 1:                 /* File name.  */
 129           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 130                                (char *) NULL);
 131           break;
 132
 133         case OPTION_IGNORE:
 134           break;
 135         case 'A':
 136           ldfile_add_arch (optarg);
 137           break;
 138         case 'B':
 139           /* Ignore.  */
 140           break;
 141         case 'b':
 142           lang_add_target (optarg);
 143           break;
 144         case 'c':
 145           ldfile_open_command_file (optarg);
 146           parser_input = input_mri_script;
 147           yyparse ();
 148           break;
 149         case OPTION_CALL_SHARED:
 150           config.dynamic_link = true;
 151           break;
 152         case OPTION_NON_SHARED:
 153           config.dynamic_link = false;
 154           break;
 155         case 'd':
 156           command_line.force_common_definition = true;
 157           break;
 158         case OPTION_DEFSYM:
 159           lex_redirect (optarg);
 160           parser_input = input_defsym;
 161           yyparse ();
 162           break;
 163         case OPTION_EB:
 164           /* FIXME: This is currently ignored.  It means
 165              ``produce a big-endian object file''.  It could
 166              be used to select an output format.  */
 167           break;
 168         case OPTION_EL:
 169           /* FIXME: This is currently ignored.  It means
 170              ``produce a little-endian object file''.  It could
 171              be used to select an output format.  */
 172           break;
 173         case 'e':
 174           lang_add_entry (optarg, 1);
 175           break;
 176         case 'F':
 177           /* Ignore.  */
 178           break;
 179         case 'G':
 180           {
 181             char *end;
 182             g_switch_value = strtoul (optarg, &end, 0);
 183             if (*end)
 184               einfo ("%P%F: invalid number `%s'\n", optarg);
 185           }
 186           break;
 187         case 'g':
 188           /* Ignore.  */
 189           break;
 190         case OPTION_HELP:
 191           help ();
 192           xexit (0);
 193           break;
 194         case 'L':
 195           ldfile_add_library_path (optarg, true);
 196           break;
 197         case 'l':
 198           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 199                                (char *) NULL);
 200           break;
 201         case 'M':
 202           config.map_filename = "-";
 203           break;
 204         case 'm':
 205           /* Ignore.  Was handled in a pre-parse.   */
 206           break;
 207         case OPTION_MAP:
 208           config.map_filename = optarg;
 209           break;
 210         case 'N':
 211           config.text_read_only = false;
 212           config.magic_demand_paged = false;
 213           break;
 214         case 'n':
 215           config.magic_demand_paged = false;
 216           break;
 217         case OPTION_NO_KEEP_MEMORY:
 218           link_info.keep_memory = false;
 219           break;
 220         case OPTION_NOINHIBIT_EXEC:
 221           force_make_executable = true;
 222           break;
 223         case 'O':
 224           /* FIXME "-O<non-digits> <value>" used to set the address of
 225              section <non-digits>.  Was this for compatibility with
 226              something, or can we create a new option to do that
 227              (with a syntax similar to -defsym)?
 228              getopt can't handle two args to an option without kludges.  */
 229           set_default_dirlist (optarg);
 230           break;
 231         case 'o':
 232           lang_add_output (optarg, 0);
 233           break;
 234         case OPTION_OFORMAT:
 235           lang_add_output_format (optarg, 0);
 236           break;
 237         case 'i':
 238         case 'r':
 239           link_info.relocateable = true;
 240           config.build_constructors = false;
 241           config.magic_demand_paged = false;
 242           config.text_read_only = false;
 243           config.dynamic_link = false;
 244           break;
 245         case 'R':
 246           lang_add_input_file (optarg,
 247                                lang_input_file_is_symbols_only_enum,
 248                                (char *) NULL);
 249           break;
 250         case OPTION_RELAX:
 251           command_line.relax = true;
 252           break;
 253         case OPTION_RETAIN_SYMBOLS_FILE:
 254           add_keepsyms_file (optarg);
 255           break;
 256         case 'S':
 257           link_info.strip = strip_debugger;
 258           break;
 259         case 's':
 260           link_info.strip = strip_all;
 261           break;
 262         case OPTION_SORT_COMMON:
 263           config.sort_common = true;
 264           break;
 265         case OPTION_STATS:
 266           config.stats = true;
 267           break;
 268         case 't':
 269           trace_files = true;
 270           break;
 271         case 'T':
 272           ldfile_open_command_file (optarg);
 273           parser_input = input_script;
 274           yyparse ();
 275           break;
 276         case OPTION_TBSS:
 277           set_section_start (".bss", optarg);
 278           break;
 279         case OPTION_TDATA:
 280           set_section_start (".data", optarg);
 281           break;
 282         case OPTION_TTEXT:
 283           set_section_start (".text", optarg);
 284           break;
 285         case OPTION_TRADITIONAL_FORMAT:
 286           config.traditional_format = true;
 287           break;
 288         case OPTION_UR:
 289           link_info.relocateable = true;
 290           config.build_constructors = true;
 291           config.magic_demand_paged = false;
 292           config.text_read_only = false;
 293           config.dynamic_link = false;
 294           break;
 295         case 'u':
 296           ldlang_add_undef (optarg);
 297           break;
 298         case 'V':
 299           ldversion (1);
 300           version_printed = true;
 301           trace_file_tries = true;
 302           break;
 303         case 'v':
 304           ldversion (0);
 305           version_printed = true;
 306           break;
 307         case OPTION_VERSION:
 308           ldversion (0);
 309           version_printed = true;
 310           break;
 311         case OPTION_WARN_COMMON:
 312           config.warn_common = true;
 313           break;
 314         case 'X':
 315           link_info.discard = discard_l;
 316           break;
 317         case 'x':
 318           link_info.discard = discard_all;
 319           break;
 320         case 'Y':
 321           set_default_dirlist (optarg);
 322           break;
 323         case 'y':
 324           add_ysym (optarg);
 325           break;
 326         }
 327     }
 328 }
 329
 330 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 331    library search path.  */
 332
 333 static void
 334 set_default_dirlist (dirlist_ptr)
 335      char *dirlist_ptr;
 336 {
 337   char *p;
 338
 339   while (1)
 340     {
 341       p = strchr (dirlist_ptr, ':');
 342       if (p != NULL)
 343         *p = 0;
 344       if (*dirlist_ptr)
 345         ldfile_add_library_path (dirlist_ptr, true);
 346       if (p == NULL)
 347         break;
 348       *p = ':';
 349       dirlist_ptr = p + 1;
 350     }
 351 }
 352
 353 static void
 354 set_section_start (sect, valstr)
 355      char *sect, *valstr;
 356 {
 357   char *end;
 358   unsigned long val = strtoul (valstr, &end, 16);
 359   if (*end)
 360     einfo ("%P%F: invalid hex number `%s'\n", valstr);
 361   lang_section_start (sect, exp_intop (val));
 362 }