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