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   int ingroup = 0;
  50
  51   /* Starting the short option string with '-' is for programs that
  52      expect options and other ARGV-elements in any order and that care about
  53      the ordering of the two.  We describe each non-option ARGV-element
  54      as if it were the argument of an option with character code 1.  */
  55
  56   const char *shortopts =
  57     "-A:B::b:cde:F::G:giL:l:Mm:NnO:o:R:rSsT:tu:VvXxY:y:()";
  58
  59   /* 150 isn't special; it's just an arbitrary non-ASCII char value.  */
  60
  61 #define OPTION_CALL_SHARED              150
  62 #define OPTION_DEFSYM                   (OPTION_CALL_SHARED + 1)
  63 #define OPTION_DYNAMIC_LINKER           (OPTION_DEFSYM + 1)
  64 #define OPTION_EB                       (OPTION_DYNAMIC_LINKER + 1)
  65 #define OPTION_EL                       (OPTION_EB + 1)
  66 #define OPTION_HELP                     (OPTION_EL + 1)
  67 #define OPTION_IGNORE                   (OPTION_HELP + 1)
  68 #define OPTION_MAP                      (OPTION_IGNORE + 1)
  69 #define OPTION_NO_KEEP_MEMORY           (OPTION_MAP + 1)
  70 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_KEEP_MEMORY + 1)
  71 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  72 #define OPTION_OFORMAT                  (OPTION_NON_SHARED + 1)
  73 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  74 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  75 #define OPTION_SHARED                   (OPTION_RETAIN_SYMBOLS_FILE + 1)
  76 #define OPTION_SORT_COMMON              (OPTION_SHARED + 1)
  77 #define OPTION_STATS                    (OPTION_SORT_COMMON + 1)
  78 #define OPTION_TBSS                     (OPTION_STATS + 1)
  79 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  80 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
  81 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
  82 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
  83 #define OPTION_VERSION                  (OPTION_UR + 1)
  84 #define OPTION_WARN_COMMON              (OPTION_VERSION + 1)
  85
  86   static struct option longopts[] = {
  87     {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
  88     {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
  89     {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
  90     {"dc", no_argument, NULL, 'd'},
  91     {"defsym", required_argument, NULL, OPTION_DEFSYM},
  92     {"dn", no_argument, NULL, OPTION_NON_SHARED},
  93     {"dp", no_argument, NULL, 'd'},
  94     {"dy", no_argument, NULL, OPTION_CALL_SHARED},
  95     {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
  96     {"EB", no_argument, NULL, OPTION_EB},
  97     {"EL", no_argument, NULL, OPTION_EL},
  98     {"end-group", no_argument, NULL, ')'},
  99     {"format", required_argument, NULL, 'b'},
 100     {"help", no_argument, NULL, OPTION_HELP},
 101     {"Map", required_argument, NULL, OPTION_MAP},
 102     {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 103     {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 104     {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 105     {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 106     {"oformat", required_argument, NULL, OPTION_OFORMAT},
 107     {"Qy", no_argument, NULL, OPTION_IGNORE},
 108     {"qmagic", no_argument, NULL, OPTION_IGNORE}, /* Linux compatibility.  */
 109     {"relax", no_argument, NULL, OPTION_RELAX},
 110     {"retain-symbols-file", required_argument, NULL, OPTION_RETAIN_SYMBOLS_FILE},
 111     {"shared", no_argument, NULL, OPTION_SHARED},
 112     {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 113     {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 114     {"start-group", no_argument, NULL, '('},
 115     {"stats", no_argument, NULL, OPTION_STATS},
 116     {"static", no_argument, NULL, OPTION_NON_SHARED},
 117     {"Tbss", required_argument, NULL, OPTION_TBSS},
 118     {"Tdata", required_argument, NULL, OPTION_TDATA},
 119     {"Ttext", required_argument, NULL, OPTION_TTEXT},
 120     {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 121     {"Ur", no_argument, NULL, OPTION_UR},
 122     {"version", no_argument, NULL, OPTION_VERSION},
 123     {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 124     {NULL, no_argument, NULL, 0}
 125   };
 126
 127   while (1)
 128     {
 129       /* getopt_long_only is like getopt_long, but '-' as well as '--' can
 130          indicate a long option.  */
 131       int longind;
 132       int optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 133
 134       if (optc == -1)
 135         break;
 136
 137       switch (optc)
 138         {
 139         default:
 140           xexit (1);
 141         case 1:                 /* File name.  */
 142           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 143                                (char *) NULL);
 144           break;
 145
 146         case OPTION_IGNORE:
 147           break;
 148         case 'A':
 149           ldfile_add_arch (optarg);
 150           break;
 151         case 'b':
 152           lang_add_target (optarg);
 153           break;
 154         case 'c':
 155           ldfile_open_command_file (optarg);
 156           parser_input = input_mri_script;
 157           yyparse ();
 158           break;
 159         case OPTION_CALL_SHARED:
 160           config.dynamic_link = true;
 161           break;
 162         case OPTION_NON_SHARED:
 163           config.dynamic_link = false;
 164           break;
 165         case 'd':
 166           command_line.force_common_definition = true;
 167           break;
 168         case OPTION_DEFSYM:
 169           lex_redirect (optarg);
 170           parser_input = input_defsym;
 171           yyparse ();
 172           break;
 173         case OPTION_DYNAMIC_LINKER:
 174           command_line.interpreter = optarg;
 175           break;
 176         case OPTION_EB:
 177           /* FIXME: This is currently ignored.  It means
 178              ``produce a big-endian object file''.  It could
 179              be used to select an output format.  */
 180           break;
 181         case OPTION_EL:
 182           /* FIXME: This is currently ignored.  It means
 183              ``produce a little-endian object file''.  It could
 184              be used to select an output format.  */
 185           break;
 186         case 'e':
 187           lang_add_entry (optarg, 1);
 188           break;
 189         case 'F':
 190           /* Ignore.  */
 191           break;
 192         case 'G':
 193           {
 194             char *end;
 195             g_switch_value = strtoul (optarg, &end, 0);
 196             if (*end)
 197               einfo ("%P%F: invalid number `%s'\n", optarg);
 198           }
 199           break;
 200         case 'g':
 201           /* Ignore.  */
 202           break;
 203         case OPTION_HELP:
 204           help ();
 205           xexit (0);
 206           break;
 207         case 'L':
 208           ldfile_add_library_path (optarg, true);
 209           break;
 210         case 'l':
 211           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 212                                (char *) NULL);
 213           break;
 214         case 'M':
 215           config.map_filename = "-";
 216           break;
 217         case 'm':
 218           /* Ignore.  Was handled in a pre-parse.   */
 219           break;
 220         case OPTION_MAP:
 221           config.map_filename = optarg;
 222           break;
 223         case 'N':
 224           config.text_read_only = false;
 225           config.magic_demand_paged = false;
 226           break;
 227         case 'n':
 228           config.magic_demand_paged = false;
 229           break;
 230         case OPTION_NO_KEEP_MEMORY:
 231           link_info.keep_memory = false;
 232           break;
 233         case OPTION_NOINHIBIT_EXEC:
 234           force_make_executable = true;
 235           break;
 236         case 'O':
 237           /* FIXME "-O<non-digits> <value>" used to set the address of
 238              section <non-digits>.  Was this for compatibility with
 239              something, or can we create a new option to do that
 240              (with a syntax similar to -defsym)?
 241              getopt can't handle two args to an option without kludges.  */
 242           set_default_dirlist (optarg);
 243           break;
 244         case 'o':
 245           lang_add_output (optarg, 0);
 246           break;
 247         case OPTION_OFORMAT:
 248           lang_add_output_format (optarg, 0);
 249           break;
 250         case 'i':
 251         case 'r':
 252           link_info.relocateable = true;
 253           config.build_constructors = false;
 254           config.magic_demand_paged = false;
 255           config.text_read_only = false;
 256           config.dynamic_link = false;
 257           break;
 258         case 'R':
 259           lang_add_input_file (optarg,
 260                                lang_input_file_is_symbols_only_enum,
 261                                (char *) NULL);
 262           break;
 263         case OPTION_RELAX:
 264           command_line.relax = true;
 265           break;
 266         case OPTION_RETAIN_SYMBOLS_FILE:
 267           add_keepsyms_file (optarg);
 268           break;
 269         case 'S':
 270           link_info.strip = strip_debugger;
 271           break;
 272         case 's':
 273           link_info.strip = strip_all;
 274           break;
 275         case OPTION_SHARED:
 276           link_info.shared = true;
 277           break;
 278         case OPTION_SORT_COMMON:
 279           config.sort_common = true;
 280           break;
 281         case OPTION_STATS:
 282           config.stats = true;
 283           break;
 284         case 't':
 285           trace_files = true;
 286           break;
 287         case 'T':
 288           ldfile_open_command_file (optarg);
 289           parser_input = input_script;
 290           yyparse ();
 291           break;
 292         case OPTION_TBSS:
 293           set_section_start (".bss", optarg);
 294           break;
 295         case OPTION_TDATA:
 296           set_section_start (".data", optarg);
 297           break;
 298         case OPTION_TTEXT:
 299           set_section_start (".text", optarg);
 300           break;
 301         case OPTION_TRADITIONAL_FORMAT:
 302           config.traditional_format = true;
 303           break;
 304         case OPTION_UR:
 305           link_info.relocateable = true;
 306           config.build_constructors = true;
 307           config.magic_demand_paged = false;
 308           config.text_read_only = false;
 309           config.dynamic_link = false;
 310           break;
 311         case 'u':
 312           ldlang_add_undef (optarg);
 313           break;
 314         case 'V':
 315           ldversion (1);
 316           version_printed = true;
 317           trace_file_tries = true;
 318           break;
 319         case 'v':
 320           ldversion (0);
 321           version_printed = true;
 322           break;
 323         case OPTION_VERSION:
 324           ldversion (0);
 325           version_printed = true;
 326           break;
 327         case OPTION_WARN_COMMON:
 328           config.warn_common = true;
 329           break;
 330         case 'X':
 331           link_info.discard = discard_l;
 332           break;
 333         case 'x':
 334           link_info.discard = discard_all;
 335           break;
 336         case 'Y':
 337           set_default_dirlist (optarg);
 338           break;
 339         case 'y':
 340           add_ysym (optarg);
 341           break;
 342         case '(':
 343           if (ingroup)
 344             {
 345               fprintf (stderr,
 346                        "%s: may not nest groups (--help for usage)\n",
 347                        program_name);
 348               xexit (1);
 349             }
 350           lang_enter_group ();
 351           ingroup = 1;
 352           break;
 353         case ')':
 354           if (! ingroup)
 355             {
 356               fprintf (stderr,
 357                        "%s: group ended before it began (--help for usage)\n",
 358                        program_name);
 359               xexit (1);
 360             }
 361           lang_leave_group ();
 362           ingroup = 0;
 363           break;
 364         }
 365     }
 366
 367   if (ingroup)
 368     lang_leave_group ();
 369 }
 370
 371 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 372    library search path.  */
 373
 374 static void
 375 set_default_dirlist (dirlist_ptr)
 376      char *dirlist_ptr;
 377 {
 378   char *p;
 379
 380   while (1)
 381     {
 382       p = strchr (dirlist_ptr, ':');
 383       if (p != NULL)
 384         *p = 0;
 385       if (*dirlist_ptr)
 386         ldfile_add_library_path (dirlist_ptr, true);
 387       if (p == NULL)
 388         break;
 389       *p = ':';
 390       dirlist_ptr = p + 1;
 391     }
 392 }
 393
 394 static void
 395 set_section_start (sect, valstr)
 396      char *sect, *valstr;
 397 {
 398   char *end;
 399   unsigned long val = strtoul (valstr, &end, 16);
 400   if (*end)
 401     einfo ("%P%F: invalid hex number `%s'\n", valstr);
 402   lang_section_start (sect, exp_intop (val));
 403 }