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