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 /* Somewhere above, sys/stat.h got included . . . . */
  38 #if !defined(S_ISDIR) && defined(S_IFDIR)
  39 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  40 #endif
  41
  42 /* Omit args to avoid the possibility of clashing with a system header
  43    that might disagree about consts.  */
  44 unsigned long strtoul ();
  45
  46 static void set_default_dirlist PARAMS ((char *dirlist_ptr));
  47 static void set_section_start PARAMS ((char *sect, char *valstr));
  48
  49 void
  50 parse_args (argc, argv)
  51      int argc;
  52      char **argv;
  53 {
  54   int ingroup = 0;
  55
  56   /* Starting the short option string with '-' is for programs that
  57      expect options and other ARGV-elements in any order and that care about
  58      the ordering of the two.  We describe each non-option ARGV-element
  59      as if it were the argument of an option with character code 1.  */
  60
  61   const char *shortopts =
  62     "-A:B::b:cde:F::G:giL:l:Mm:NnO:o:R:rSsT:tu:VvXxY:y:()";
  63
  64   /* 150 isn't special; it's just an arbitrary non-ASCII char value.  */
  65
  66 #define OPTION_CALL_SHARED              150
  67 #define OPTION_DEFSYM                   (OPTION_CALL_SHARED + 1)
  68 #define OPTION_DYNAMIC_LINKER           (OPTION_DEFSYM + 1)
  69 #define OPTION_EB                       (OPTION_DYNAMIC_LINKER + 1)
  70 #define OPTION_EL                       (OPTION_EB + 1)
  71 #define OPTION_HELP                     (OPTION_EL + 1)
  72 #define OPTION_IGNORE                   (OPTION_HELP + 1)
  73 #define OPTION_MAP                      (OPTION_IGNORE + 1)
  74 #define OPTION_NO_KEEP_MEMORY           (OPTION_MAP + 1)
  75 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_KEEP_MEMORY + 1)
  76 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  77 #define OPTION_OFORMAT                  (OPTION_NON_SHARED + 1)
  78 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  79 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  80 #define OPTION_RPATH                    (OPTION_RETAIN_SYMBOLS_FILE + 1)
  81 #define OPTION_SHARED                   (OPTION_RPATH + 1)
  82 #define OPTION_SONAME                   (OPTION_SHARED + 1)
  83 #define OPTION_SORT_COMMON              (OPTION_SONAME + 1)
  84 #define OPTION_STATS                    (OPTION_SORT_COMMON + 1)
  85 #define OPTION_TBSS                     (OPTION_STATS + 1)
  86 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  87 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
  88 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
  89 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
  90 #define OPTION_VERSION                  (OPTION_UR + 1)
  91 #define OPTION_WARN_COMMON              (OPTION_VERSION + 1)
  92 #define OPTION_WARN_ONCE                (OPTION_WARN_COMMON + 1)
  93
  94   static struct option longopts[] = {
  95     {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
  96     {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
  97     {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
  98     {"dc", no_argument, NULL, 'd'},
  99     {"defsym", required_argument, NULL, OPTION_DEFSYM},
 100     {"dll-verbose", no_argument, NULL, OPTION_VERSION}, /* Linux.  */
 101     {"dn", no_argument, NULL, OPTION_NON_SHARED},
 102     {"dp", no_argument, NULL, 'd'},
 103     {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 104     {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 105     {"EB", no_argument, NULL, OPTION_EB},
 106     {"EL", no_argument, NULL, OPTION_EL},
 107     {"end-group", no_argument, NULL, ')'},
 108     {"format", required_argument, NULL, 'b'},
 109     {"help", no_argument, NULL, OPTION_HELP},
 110     {"Map", required_argument, NULL, OPTION_MAP},
 111     {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 112     {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 113     {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 114     {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 115     {"oformat", required_argument, NULL, OPTION_OFORMAT},
 116     {"Qy", no_argument, NULL, OPTION_IGNORE},
 117     {"qmagic", no_argument, NULL, OPTION_IGNORE}, /* Linux compatibility.  */
 118     {"relax", no_argument, NULL, OPTION_RELAX},
 119     {"retain-symbols-file", required_argument, NULL, OPTION_RETAIN_SYMBOLS_FILE},
 120     {"rpath", required_argument, NULL, OPTION_RPATH},
 121     {"shared", no_argument, NULL, OPTION_SHARED},
 122     {"soname", required_argument, NULL, OPTION_SONAME},
 123     {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 124     {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 125     {"start-group", no_argument, NULL, '('},
 126     {"stats", no_argument, NULL, OPTION_STATS},
 127     {"static", no_argument, NULL, OPTION_NON_SHARED},
 128     {"Tbss", required_argument, NULL, OPTION_TBSS},
 129     {"Tdata", required_argument, NULL, OPTION_TDATA},
 130     {"Ttext", required_argument, NULL, OPTION_TTEXT},
 131     {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 132     {"Ur", no_argument, NULL, OPTION_UR},
 133     {"version", no_argument, NULL, OPTION_VERSION},
 134     {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 135     {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 136     {NULL, no_argument, NULL, 0}
 137   };
 138
 139   while (1)
 140     {
 141       /* getopt_long_only is like getopt_long, but '-' as well as '--' can
 142          indicate a long option.  */
 143       int longind;
 144       int optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 145
 146       if (optc == -1)
 147         break;
 148
 149       switch (optc)
 150         {
 151         default:
 152           xexit (1);
 153         case 1:                 /* File name.  */
 154           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 155                                (char *) NULL);
 156           break;
 157
 158         case OPTION_IGNORE:
 159           break;
 160         case 'A':
 161           ldfile_add_arch (optarg);
 162           break;
 163         case 'b':
 164           lang_add_target (optarg);
 165           break;
 166         case 'c':
 167           ldfile_open_command_file (optarg);
 168           parser_input = input_mri_script;
 169           yyparse ();
 170           break;
 171         case OPTION_CALL_SHARED:
 172           config.dynamic_link = true;
 173           break;
 174         case OPTION_NON_SHARED:
 175           config.dynamic_link = false;
 176           break;
 177         case 'd':
 178           command_line.force_common_definition = true;
 179           break;
 180         case OPTION_DEFSYM:
 181           lex_redirect (optarg);
 182           parser_input = input_defsym;
 183           yyparse ();
 184           break;
 185         case OPTION_DYNAMIC_LINKER:
 186           command_line.interpreter = optarg;
 187           break;
 188         case OPTION_EB:
 189           command_line.endian = ENDIAN_BIG;
 190           break;
 191         case OPTION_EL:
 192           command_line.endian = ENDIAN_LITTLE;
 193           break;
 194         case 'e':
 195           lang_add_entry (optarg, 1);
 196           break;
 197         case 'F':
 198           /* Ignore.  */
 199           break;
 200         case 'G':
 201           {
 202             char *end;
 203             g_switch_value = strtoul (optarg, &end, 0);
 204             if (*end)
 205               einfo ("%P%F: invalid number `%s'\n", optarg);
 206           }
 207           break;
 208         case 'g':
 209           /* Ignore.  */
 210           break;
 211         case OPTION_HELP:
 212           help ();
 213           xexit (0);
 214           break;
 215         case 'L':
 216           ldfile_add_library_path (optarg, true);
 217           break;
 218         case 'l':
 219           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 220                                (char *) NULL);
 221           break;
 222         case 'M':
 223           config.map_filename = "-";
 224           break;
 225         case 'm':
 226           /* Ignore.  Was handled in a pre-parse.   */
 227           break;
 228         case OPTION_MAP:
 229           config.map_filename = optarg;
 230           break;
 231         case 'N':
 232           config.text_read_only = false;
 233           config.magic_demand_paged = false;
 234           break;
 235         case 'n':
 236           config.magic_demand_paged = false;
 237           break;
 238         case OPTION_NO_KEEP_MEMORY:
 239           link_info.keep_memory = false;
 240           break;
 241         case OPTION_NOINHIBIT_EXEC:
 242           force_make_executable = true;
 243           break;
 244         case 'O':
 245           /* FIXME "-O<non-digits> <value>" used to set the address of
 246              section <non-digits>.  Was this for compatibility with
 247              something, or can we create a new option to do that
 248              (with a syntax similar to -defsym)?
 249              getopt can't handle two args to an option without kludges.  */
 250           set_default_dirlist (optarg);
 251           break;
 252         case 'o':
 253           lang_add_output (optarg, 0);
 254           break;
 255         case OPTION_OFORMAT:
 256           lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
 257           break;
 258         case 'i':
 259         case 'r':
 260           link_info.relocateable = true;
 261           config.build_constructors = false;
 262           config.magic_demand_paged = false;
 263           config.text_read_only = false;
 264           config.dynamic_link = false;
 265           break;
 266         case 'R':
 267           /* The GNU linker traditionally uses -R to mean to include
 268              only the symbols from a file.  The Solaris linker uses -R
 269              to set the path used by the runtime linker to find
 270              libraries.  This is the GNU linker -rpath argument.  We
 271              try to support both simultaneously by checking the file
 272              named.  If it is a directory, rather than a regular file,
 273              we assume -rpath was meant.  */
 274           {
 275             struct stat s;
 276
 277             if (stat (optarg, &s) >= 0
 278                 && ! S_ISDIR (s.st_mode))
 279               {
 280                 lang_add_input_file (optarg,
 281                                      lang_input_file_is_symbols_only_enum,
 282                                      (char *) NULL);
 283                 break;
 284               }
 285           }
 286           /* Fall through.  */
 287         case OPTION_RPATH:
 288           if (command_line.rpath == NULL)
 289             command_line.rpath = buystring (optarg);
 290           else
 291             {
 292               char *buf;
 293
 294               buf = xmalloc (strlen (command_line.rpath)
 295                              + strlen (optarg)
 296                              + 2);
 297               sprintf (buf, "%s:%s", command_line.rpath, optarg);
 298               free (command_line.rpath);
 299               command_line.rpath = buf;
 300             }
 301           break;
 302         case OPTION_RELAX:
 303           command_line.relax = true;
 304           break;
 305         case OPTION_RETAIN_SYMBOLS_FILE:
 306           add_keepsyms_file (optarg);
 307           break;
 308         case 'S':
 309           link_info.strip = strip_debugger;
 310           break;
 311         case 's':
 312           link_info.strip = strip_all;
 313           break;
 314         case OPTION_SHARED:
 315           link_info.shared = true;
 316           break;
 317         case OPTION_SONAME:
 318           command_line.soname = optarg;
 319           break;
 320         case OPTION_SORT_COMMON:
 321           config.sort_common = true;
 322           break;
 323         case OPTION_STATS:
 324           config.stats = true;
 325           break;
 326         case 't':
 327           trace_files = true;
 328           break;
 329         case 'T':
 330           ldfile_open_command_file (optarg);
 331           parser_input = input_script;
 332           yyparse ();
 333           break;
 334         case OPTION_TBSS:
 335           set_section_start (".bss", optarg);
 336           break;
 337         case OPTION_TDATA:
 338           set_section_start (".data", optarg);
 339           break;
 340         case OPTION_TTEXT:
 341           set_section_start (".text", optarg);
 342           break;
 343         case OPTION_TRADITIONAL_FORMAT:
 344           config.traditional_format = true;
 345           break;
 346         case OPTION_UR:
 347           link_info.relocateable = true;
 348           config.build_constructors = true;
 349           config.magic_demand_paged = false;
 350           config.text_read_only = false;
 351           config.dynamic_link = false;
 352           break;
 353         case 'u':
 354           ldlang_add_undef (optarg);
 355           break;
 356         case 'V':
 357           ldversion (1);
 358           version_printed = true;
 359           trace_file_tries = true;
 360           break;
 361         case 'v':
 362           ldversion (0);
 363           version_printed = true;
 364           break;
 365         case OPTION_VERSION:
 366           ldversion (0);
 367           version_printed = true;
 368           break;
 369         case OPTION_WARN_COMMON:
 370           config.warn_common = true;
 371           break;
 372         case OPTION_WARN_ONCE:
 373           config.warn_once = true;
 374           break;
 375         case 'X':
 376           link_info.discard = discard_l;
 377           break;
 378         case 'x':
 379           link_info.discard = discard_all;
 380           break;
 381         case 'Y':
 382           set_default_dirlist (optarg);
 383           break;
 384         case 'y':
 385           add_ysym (optarg);
 386           break;
 387         case '(':
 388           if (ingroup)
 389             {
 390               fprintf (stderr,
 391                        "%s: may not nest groups (--help for usage)\n",
 392                        program_name);
 393               xexit (1);
 394             }
 395           lang_enter_group ();
 396           ingroup = 1;
 397           break;
 398         case ')':
 399           if (! ingroup)
 400             {
 401               fprintf (stderr,
 402                        "%s: group ended before it began (--help for usage)\n",
 403                        program_name);
 404               xexit (1);
 405             }
 406           lang_leave_group ();
 407           ingroup = 0;
 408           break;
 409         }
 410     }
 411
 412   if (ingroup)
 413     lang_leave_group ();
 414 }
 415
 416 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 417    library search path.  */
 418
 419 static void
 420 set_default_dirlist (dirlist_ptr)
 421      char *dirlist_ptr;
 422 {
 423   char *p;
 424
 425   while (1)
 426     {
 427       p = strchr (dirlist_ptr, ':');
 428       if (p != NULL)
 429         *p = 0;
 430       if (*dirlist_ptr)
 431         ldfile_add_library_path (dirlist_ptr, true);
 432       if (p == NULL)
 433         break;
 434       *p = ':';
 435       dirlist_ptr = p + 1;
 436     }
 437 }
 438
 439 static void
 440 set_section_start (sect, valstr)
 441      char *sect, *valstr;
 442 {
 443   char *end;
 444   unsigned long val = strtoul (valstr, &end, 16);
 445   if (*end)
 446     einfo ("%P%F: invalid hex number `%s'\n", valstr);
 447   lang_section_start (sect, exp_intop (val));
 448 }