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