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     {"static", no_argument, NULL, OPTION_NON_SHARED},
 108     {"Tbss", required_argument, NULL, OPTION_TBSS},
 109     {"Tdata", required_argument, NULL, OPTION_TDATA},
 110     {"Ttext", required_argument, NULL, OPTION_TTEXT},
 111     {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 112     {"Ur", no_argument, NULL, OPTION_UR},
 113     {"version", no_argument, NULL, OPTION_VERSION},
 114     {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 115     {NULL, no_argument, NULL, 0}
 116   };
 117
 118   while (1)
 119     {
 120       /* getopt_long_only is like getopt_long, but '-' as well as '--' can
 121          indicate a long option.  */
 122       int longind;
 123       int optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 124
 125       if (optc == -1)
 126         break;
 127
 128       switch (optc)
 129         {
 130         default:
 131           xexit (1);
 132         case 1:                 /* File name.  */
 133           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 134                                (char *) NULL);
 135           break;
 136
 137         case OPTION_IGNORE:
 138           break;
 139         case 'A':
 140           ldfile_add_arch (optarg);
 141           break;
 142         case 'B':
 143           /* Ignore.  */
 144           break;
 145         case 'b':
 146           lang_add_target (optarg);
 147           break;
 148         case 'c':
 149           ldfile_open_command_file (optarg);
 150           parser_input = input_mri_script;
 151           yyparse ();
 152           break;
 153         case OPTION_CALL_SHARED:
 154           config.dynamic_link = true;
 155           break;
 156         case OPTION_NON_SHARED:
 157           config.dynamic_link = false;
 158           break;
 159         case 'd':
 160           command_line.force_common_definition = true;
 161           break;
 162         case OPTION_DEFSYM:
 163           lex_redirect (optarg);
 164           parser_input = input_defsym;
 165           yyparse ();
 166           break;
 167         case OPTION_DYNAMIC_LINKER:
 168           command_line.interpreter = optarg;
 169           break;
 170         case OPTION_EB:
 171           /* FIXME: This is currently ignored.  It means
 172              ``produce a big-endian object file''.  It could
 173              be used to select an output format.  */
 174           break;
 175         case OPTION_EL:
 176           /* FIXME: This is currently ignored.  It means
 177              ``produce a little-endian object file''.  It could
 178              be used to select an output format.  */
 179           break;
 180         case 'e':
 181           lang_add_entry (optarg, 1);
 182           break;
 183         case 'F':
 184           /* Ignore.  */
 185           break;
 186         case 'G':
 187           {
 188             char *end;
 189             g_switch_value = strtoul (optarg, &end, 0);
 190             if (*end)
 191               einfo ("%P%F: invalid number `%s'\n", optarg);
 192           }
 193           break;
 194         case 'g':
 195           /* Ignore.  */
 196           break;
 197         case OPTION_HELP:
 198           help ();
 199           xexit (0);
 200           break;
 201         case 'L':
 202           ldfile_add_library_path (optarg, true);
 203           break;
 204         case 'l':
 205           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 206                                (char *) NULL);
 207           break;
 208         case 'M':
 209           config.map_filename = "-";
 210           break;
 211         case 'm':
 212           /* Ignore.  Was handled in a pre-parse.   */
 213           break;
 214         case OPTION_MAP:
 215           config.map_filename = optarg;
 216           break;
 217         case 'N':
 218           config.text_read_only = false;
 219           config.magic_demand_paged = false;
 220           break;
 221         case 'n':
 222           config.magic_demand_paged = false;
 223           break;
 224         case OPTION_NO_KEEP_MEMORY:
 225           link_info.keep_memory = false;
 226           break;
 227         case OPTION_NOINHIBIT_EXEC:
 228           force_make_executable = true;
 229           break;
 230         case 'O':
 231           /* FIXME "-O<non-digits> <value>" used to set the address of
 232              section <non-digits>.  Was this for compatibility with
 233              something, or can we create a new option to do that
 234              (with a syntax similar to -defsym)?
 235              getopt can't handle two args to an option without kludges.  */
 236           set_default_dirlist (optarg);
 237           break;
 238         case 'o':
 239           lang_add_output (optarg, 0);
 240           break;
 241         case OPTION_OFORMAT:
 242           lang_add_output_format (optarg, 0);
 243           break;
 244         case 'i':
 245         case 'r':
 246           link_info.relocateable = true;
 247           config.build_constructors = false;
 248           config.magic_demand_paged = false;
 249           config.text_read_only = false;
 250           config.dynamic_link = false;
 251           break;
 252         case 'R':
 253           lang_add_input_file (optarg,
 254                                lang_input_file_is_symbols_only_enum,
 255                                (char *) NULL);
 256           break;
 257         case OPTION_RELAX:
 258           command_line.relax = true;
 259           break;
 260         case OPTION_RETAIN_SYMBOLS_FILE:
 261           add_keepsyms_file (optarg);
 262           break;
 263         case 'S':
 264           link_info.strip = strip_debugger;
 265           break;
 266         case 's':
 267           link_info.strip = strip_all;
 268           break;
 269         case OPTION_SORT_COMMON:
 270           config.sort_common = true;
 271           break;
 272         case OPTION_STATS:
 273           config.stats = true;
 274           break;
 275         case 't':
 276           trace_files = true;
 277           break;
 278         case 'T':
 279           ldfile_open_command_file (optarg);
 280           parser_input = input_script;
 281           yyparse ();
 282           break;
 283         case OPTION_TBSS:
 284           set_section_start (".bss", optarg);
 285           break;
 286         case OPTION_TDATA:
 287           set_section_start (".data", optarg);
 288           break;
 289         case OPTION_TTEXT:
 290           set_section_start (".text", optarg);
 291           break;
 292         case OPTION_TRADITIONAL_FORMAT:
 293           config.traditional_format = true;
 294           break;
 295         case OPTION_UR:
 296           link_info.relocateable = true;
 297           config.build_constructors = true;
 298           config.magic_demand_paged = false;
 299           config.text_read_only = false;
 300           config.dynamic_link = false;
 301           break;
 302         case 'u':
 303           ldlang_add_undef (optarg);
 304           break;
 305         case 'V':
 306           ldversion (1);
 307           version_printed = true;
 308           trace_file_tries = true;
 309           break;
 310         case 'v':
 311           ldversion (0);
 312           version_printed = true;
 313           break;
 314         case OPTION_VERSION:
 315           ldversion (0);
 316           version_printed = true;
 317           break;
 318         case OPTION_WARN_COMMON:
 319           config.warn_common = true;
 320           break;
 321         case 'X':
 322           link_info.discard = discard_l;
 323           break;
 324         case 'x':
 325           link_info.discard = discard_all;
 326           break;
 327         case 'Y':
 328           set_default_dirlist (optarg);
 329           break;
 330         case 'y':
 331           add_ysym (optarg);
 332           break;
 333         }
 334     }
 335 }
 336
 337 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 338    library search path.  */
 339
 340 static void
 341 set_default_dirlist (dirlist_ptr)
 342      char *dirlist_ptr;
 343 {
 344   char *p;
 345
 346   while (1)
 347     {
 348       p = strchr (dirlist_ptr, ':');
 349       if (p != NULL)
 350         *p = 0;
 351       if (*dirlist_ptr)
 352         ldfile_add_library_path (dirlist_ptr, true);
 353       if (p == NULL)
 354         break;
 355       *p = ':';
 356       dirlist_ptr = p + 1;
 357     }
 358 }
 359
 360 static void
 361 set_section_start (sect, valstr)
 362      char *sect, *valstr;
 363 {
 364   char *end;
 365   unsigned long val = strtoul (valstr, &end, 16);
 366   if (*end)
 367     einfo ("%P%F: invalid hex number `%s'\n", valstr);
 368   lang_section_start (sect, exp_intop (val));
 369 }