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_DYNAMIC_LINKER           (OPTION_DEFSYM + 1)
  61 #define OPTION_EB                       (OPTION_DYNAMIC_LINKER + 1)
  62 #define OPTION_EL                       (OPTION_EB + 1)
  63 #define OPTION_HELP                     (OPTION_EL + 1)
  64 #define OPTION_IGNORE                   (OPTION_HELP + 1)
  65 #define OPTION_MAP                      (OPTION_IGNORE + 1)
  66 #define OPTION_NO_KEEP_MEMORY           (OPTION_MAP + 1)
  67 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_KEEP_MEMORY + 1)
  68 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  69 #define OPTION_OFORMAT                  (OPTION_NON_SHARED + 1)
  70 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  71 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  72 #define OPTION_SORT_COMMON              (OPTION_RETAIN_SYMBOLS_FILE + 1)
  73 #define OPTION_STATS                    (OPTION_SORT_COMMON + 1)
  74 #define OPTION_TBSS                     (OPTION_STATS + 1)
  75 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  76 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
  77 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
  78 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
  79 #define OPTION_VERSION                  (OPTION_UR + 1)
  80 #define OPTION_WARN_COMMON              (OPTION_VERSION + 1)
  81
  82   static struct option longopts[] = {
  83     {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
  84     {"dc", no_argument, NULL, 'd'},
  85     {"defsym", required_argument, NULL, OPTION_DEFSYM},
  86     {"dn", no_argument, NULL, OPTION_NON_SHARED},
  87     {"dp", no_argument, NULL, 'd'},
  88     {"dy", no_argument, NULL, OPTION_CALL_SHARED},
  89     {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
  90     {"EB", no_argument, NULL, OPTION_EB},
  91     {"EL", no_argument, NULL, OPTION_EL},
  92     {"format", required_argument, NULL, 'b'},
  93     {"help", no_argument, NULL, OPTION_HELP},
  94     {"Map", required_argument, NULL, OPTION_MAP},
  95     {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
  96     {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
  97     {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
  98     {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
  99     {"oformat", required_argument, NULL, OPTION_OFORMAT},
 100     {"Qy", no_argument, NULL, OPTION_IGNORE},
 101     {"qmagic", no_argument, NULL, OPTION_IGNORE}, /* Linux compatibility.  */
 102     {"relax", no_argument, NULL, OPTION_RELAX},
 103     {"retain-symbols-file", no_argument, NULL, OPTION_RETAIN_SYMBOLS_FILE},
 104     {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 105     {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 106     {"stats", no_argument, NULL, OPTION_STATS},
 107     {"Tbss", required_argument, NULL, OPTION_TBSS},
 108     {"Tdata", required_argument, NULL, OPTION_TDATA},
 109     {"Ttext", required_argument, NULL, OPTION_TTEXT},
 110     {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 111     {"Ur", no_argument, NULL, OPTION_UR},
 112     {"version", no_argument, NULL, OPTION_VERSION},
 113     {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 114     {NULL, no_argument, NULL, 0}
 115   };
 116
 117   while (1)
 118     {
 119       /* getopt_long_only is like getopt_long, but '-' as well as '--' can
 120          indicate a long option.  */
 121       int longind;
 122       int optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 123
 124       if (optc == -1)
 125         break;
 126
 127       switch (optc)
 128         {
 129         default:
 130           xexit (1);
 131         case 1:                 /* File name.  */
 132           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 133                                (char *) NULL);
 134           break;
 135
 136         case OPTION_IGNORE:
 137           break;
 138         case 'A':
 139           ldfile_add_arch (optarg);
 140           break;
 141         case 'B':
 142           /* Ignore.  */
 143           break;
 144         case 'b':
 145           lang_add_target (optarg);
 146           break;
 147         case 'c':
 148           ldfile_open_command_file (optarg);
 149           parser_input = input_mri_script;
 150           yyparse ();
 151           break;
 152         case OPTION_CALL_SHARED:
 153           config.dynamic_link = true;
 154           break;
 155         case OPTION_NON_SHARED:
 156           config.dynamic_link = false;
 157           break;
 158         case 'd':
 159           command_line.force_common_definition = true;
 160           break;
 161         case OPTION_DEFSYM:
 162           lex_redirect (optarg);
 163           parser_input = input_defsym;
 164           yyparse ();
 165           break;
 166         case OPTION_DYNAMIC_LINKER:
 167           command_line.interpreter = optarg;
 168           break;
 169         case OPTION_EB:
 170           /* FIXME: This is currently ignored.  It means
 171              ``produce a big-endian object file''.  It could
 172              be used to select an output format.  */
 173           break;
 174         case OPTION_EL:
 175           /* FIXME: This is currently ignored.  It means
 176              ``produce a little-endian object file''.  It could
 177              be used to select an output format.  */
 178           break;
 179         case 'e':
 180           lang_add_entry (optarg, 1);
 181           break;
 182         case 'F':
 183           /* Ignore.  */
 184           break;
 185         case 'G':
 186           {
 187             char *end;
 188             g_switch_value = strtoul (optarg, &end, 0);
 189             if (*end)
 190               einfo ("%P%F: invalid number `%s'\n", optarg);
 191           }
 192           break;
 193         case 'g':
 194           /* Ignore.  */
 195           break;
 196         case OPTION_HELP:
 197           help ();
 198           xexit (0);
 199           break;
 200         case 'L':
 201           ldfile_add_library_path (optarg, true);
 202           break;
 203         case 'l':
 204           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 205                                (char *) NULL);
 206           break;
 207         case 'M':
 208           config.map_filename = "-";
 209           break;
 210         case 'm':
 211           /* Ignore.  Was handled in a pre-parse.   */
 212           break;
 213         case OPTION_MAP:
 214           config.map_filename = optarg;
 215           break;
 216         case 'N':
 217           config.text_read_only = false;
 218           config.magic_demand_paged = false;
 219           break;
 220         case 'n':
 221           config.magic_demand_paged = false;
 222           break;
 223         case OPTION_NO_KEEP_MEMORY:
 224           link_info.keep_memory = false;
 225           break;
 226         case OPTION_NOINHIBIT_EXEC:
 227           force_make_executable = true;
 228           break;
 229         case 'O':
 230           /* FIXME "-O<non-digits> <value>" used to set the address of
 231              section <non-digits>.  Was this for compatibility with
 232              something, or can we create a new option to do that
 233              (with a syntax similar to -defsym)?
 234              getopt can't handle two args to an option without kludges.  */
 235           set_default_dirlist (optarg);
 236           break;
 237         case 'o':
 238           lang_add_output (optarg, 0);
 239           break;
 240         case OPTION_OFORMAT:
 241           lang_add_output_format (optarg, 0);
 242           break;
 243         case 'i':
 244         case 'r':
 245           link_info.relocateable = true;
 246           config.build_constructors = false;
 247           config.magic_demand_paged = false;
 248           config.text_read_only = false;
 249           config.dynamic_link = false;
 250           break;
 251         case 'R':
 252           lang_add_input_file (optarg,
 253                                lang_input_file_is_symbols_only_enum,
 254                                (char *) NULL);
 255           break;
 256         case OPTION_RELAX:
 257           command_line.relax = true;
 258           break;
 259         case OPTION_RETAIN_SYMBOLS_FILE:
 260           add_keepsyms_file (optarg);
 261           break;
 262         case 'S':
 263           link_info.strip = strip_debugger;
 264           break;
 265         case 's':
 266           link_info.strip = strip_all;
 267           break;
 268         case OPTION_SORT_COMMON:
 269           config.sort_common = true;
 270           break;
 271         case OPTION_STATS:
 272           config.stats = true;
 273           break;
 274         case 't':
 275           trace_files = true;
 276           break;
 277         case 'T':
 278           ldfile_open_command_file (optarg);
 279           parser_input = input_script;
 280           yyparse ();
 281           break;
 282         case OPTION_TBSS:
 283           set_section_start (".bss", optarg);
 284           break;
 285         case OPTION_TDATA:
 286           set_section_start (".data", optarg);
 287           break;
 288         case OPTION_TTEXT:
 289           set_section_start (".text", optarg);
 290           break;
 291         case OPTION_TRADITIONAL_FORMAT:
 292           config.traditional_format = true;
 293           break;
 294         case OPTION_UR:
 295           link_info.relocateable = true;
 296           config.build_constructors = true;
 297           config.magic_demand_paged = false;
 298           config.text_read_only = false;
 299           config.dynamic_link = false;
 300           break;
 301         case 'u':
 302           ldlang_add_undef (optarg);
 303           break;
 304         case 'V':
 305           ldversion (1);
 306           version_printed = true;
 307           trace_file_tries = true;
 308           break;
 309         case 'v':
 310           ldversion (0);
 311           version_printed = true;
 312           break;
 313         case OPTION_VERSION:
 314           ldversion (0);
 315           version_printed = true;
 316           break;
 317         case OPTION_WARN_COMMON:
 318           config.warn_common = true;
 319           break;
 320         case 'X':
 321           link_info.discard = discard_l;
 322           break;
 323         case 'x':
 324           link_info.discard = discard_all;
 325           break;
 326         case 'Y':
 327           set_default_dirlist (optarg);
 328           break;
 329         case 'y':
 330           add_ysym (optarg);
 331           break;
 332         }
 333     }
 334 }
 335
 336 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 337    library search path.  */
 338
 339 static void
 340 set_default_dirlist (dirlist_ptr)
 341      char *dirlist_ptr;
 342 {
 343   char *p;
 344
 345   while (1)
 346     {
 347       p = strchr (dirlist_ptr, ':');
 348       if (p != NULL)
 349         *p = 0;
 350       if (*dirlist_ptr)
 351         ldfile_add_library_path (dirlist_ptr, true);
 352       if (p == NULL)
 353         break;
 354       *p = ':';
 355       dirlist_ptr = p + 1;
 356     }
 357 }
 358
 359 static void
 360 set_section_start (sect, valstr)
 361      char *sect, *valstr;
 362 {
 363   char *end;
 364   unsigned long val = strtoul (valstr, &end, 16);
 365   if (*end)
 366     einfo ("%P%F: invalid hex number `%s'\n", valstr);
 367   lang_section_start (sect, exp_intop (val));
 368 }