ld/ldfile.c

   1 /* Copyright (C) 1991, 92, 93, 94, 95, 98, 1999 Free Software Foundation, Inc.
   2
   3 This file is part of GLD, the Gnu Linker.
   4
   5 GLD is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 GLD is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with GLD; see the file COPYING.  If not, write to the Free
  17 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  18 02111-1307, USA.  */
  19
  20 /*
  21  ldfile.c
  22
  23  look after all the file stuff
  24
  25  */
  26
  27 #include "bfd.h"
  28 #include "sysdep.h"
  29 #include "bfdlink.h"
  30 #include "ld.h"
  31 #include "ldmisc.h"
  32 #include "ldexp.h"
  33 #include "ldlang.h"
  34 #include "ldfile.h"
  35 #include "ldmain.h"
  36 #include "ldgram.h"
  37 #include "ldlex.h"
  38 #include "ldemul.h"
  39
  40 #include <ctype.h>
  41
  42 const char *ldfile_input_filename;
  43 boolean ldfile_assumed_script = false;
  44 const char *ldfile_output_machine_name = "";
  45 unsigned long ldfile_output_machine;
  46 enum bfd_architecture ldfile_output_architecture;
  47 search_dirs_type *search_head;
  48
  49 #ifndef MPW
  50 #ifdef VMS
  51 char *slash = "";
  52 #else
  53 #if defined (_WIN32) && ! defined (__CYGWIN32__)
  54 char *slash = "\\";
  55 #else
  56 char *slash = "/";
  57 #endif
  58 #endif
  59 #else /* MPW */
  60 /* The MPW path char is a colon. */
  61 char *slash = ":";
  62 #endif /* MPW */
  63
  64 /* LOCAL */
  65
  66 static search_dirs_type **search_tail_ptr = &search_head;
  67
  68 typedef struct search_arch
  69 {
  70   char *name;
  71   struct search_arch *next;
  72 } search_arch_type;
  73
  74 static search_arch_type *search_arch_head;
  75 static search_arch_type **search_arch_tail_ptr = &search_arch_head;
  76
  77 static boolean ldfile_open_file_search
  78   PARAMS ((const char *arch, lang_input_statement_type *,
  79            const char *lib, const char *suffix));
  80 static FILE *try_open PARAMS ((const char *name, const char *exten));
  81
  82 void
  83 ldfile_add_library_path (name, cmdline)
  84      const char *name;
  85      boolean cmdline;
  86 {
  87   search_dirs_type *new;
  88
  89   new = (search_dirs_type *) xmalloc (sizeof (search_dirs_type));
  90   new->next = NULL;
  91   new->name = name;
  92   new->cmdline = cmdline;
  93   *search_tail_ptr = new;
  94   search_tail_ptr = &new->next;
  95 }
  96
  97 /* Try to open a BFD for a lang_input_statement.  */
  98
  99 boolean
 100 ldfile_try_open_bfd (attempt, entry)
 101      const char *attempt;
 102      lang_input_statement_type *entry;
 103 {
 104   entry->the_bfd = bfd_openr (attempt, entry->target);
 105
 106   if (trace_file_tries)
 107     {
 108       if (entry->the_bfd == NULL)
 109         info_msg (_("attempt to open %s failed\n"), attempt);
 110       else
 111         info_msg (_("attempt to open %s succeeded\n"), attempt);
 112     }
 113
 114   if (entry->the_bfd != NULL)
 115     return true;
 116   else
 117     {
 118       if (bfd_get_error () == bfd_error_invalid_target)
 119         einfo (_("%F%P: invalid BFD target `%s'\n"), entry->target);
 120       return false;
 121     }
 122 }
 123
 124 /* Search for and open the file specified by ENTRY.  If it is an
 125    archive, use ARCH, LIB and SUFFIX to modify the file name.  */
 126
 127 static boolean
 128 ldfile_open_file_search (arch, entry, lib, suffix)
 129      const char *arch;
 130      lang_input_statement_type *entry;
 131      const char *lib;
 132      const char *suffix;
 133 {
 134   search_dirs_type *search;
 135
 136   /* If this is not an archive, try to open it in the current
 137      directory first.  */
 138   if (! entry->is_archive)
 139     {
 140       if (ldfile_try_open_bfd (entry->filename, entry))
 141         return true;
 142     }
 143
 144   for (search = search_head;
 145        search != (search_dirs_type *)NULL;
 146        search = search->next)
 147     {
 148       char *string;
 149
 150       if (entry->dynamic && ! link_info.relocateable)
 151         {
 152           if (ldemul_open_dynamic_archive (arch, search, entry))
 153             return true;
 154         }
 155
 156       string = (char *) xmalloc (strlen (search->name)
 157                                  + strlen (slash)
 158                                  + strlen (lib)
 159                                  + strlen (entry->filename)
 160                                  + strlen (arch)
 161                                  + strlen (suffix)
 162                                  + 1);
 163
 164       if (entry->is_archive)
 165         sprintf (string, "%s%s%s%s%s%s", search->name, slash,
 166                  lib, entry->filename, arch, suffix);
 167       else if (entry->filename[0] == '/' || entry->filename[0] == '.'
 168 #if defined (__MSDOS__) || defined (_WIN32)
 169                || entry->filename[0] == '\\'
 170                || (isalpha (entry->filename[0])
 171                    && entry->filename[1] == ':')
 172 #endif
 173           )
 174         strcpy (string, entry->filename);
 175       else
 176         sprintf (string, "%s%s%s", search->name, slash, entry->filename);
 177
 178       if (ldfile_try_open_bfd (string, entry))
 179         {
 180           entry->filename = string;
 181           return true;
 182         }
 183
 184       free (string);
 185     }
 186
 187   return false;
 188 }
 189
 190 /* Open the input file specified by ENTRY.  */
 191
 192 void
 193 ldfile_open_file (entry)
 194      lang_input_statement_type *entry;
 195 {
 196   if (entry->the_bfd != NULL)
 197     return;
 198
 199   if (! entry->search_dirs_flag)
 200     {
 201       if (ldfile_try_open_bfd (entry->filename, entry))
 202         return;
 203       if (strcmp (entry->filename, entry->local_sym_name) != 0)
 204         einfo (_("%F%P: cannot open %s for %s: %E\n"),
 205                entry->filename, entry->local_sym_name);
 206       else
 207         einfo(_("%F%P: cannot open %s: %E\n"), entry->local_sym_name);
 208     }
 209   else
 210     {
 211       search_arch_type *arch;
 212
 213       /* Try to open <filename><suffix> or lib<filename><suffix>.a */
 214       for (arch = search_arch_head;
 215            arch != (search_arch_type *) NULL;
 216            arch = arch->next)
 217         {
 218           if (ldfile_open_file_search (arch->name, entry, "lib", ".a"))
 219             return;
 220 #ifdef VMS
 221           if (ldfile_open_file_search (arch->name, entry, ":lib", ".a"))
 222             return;
 223 #endif
 224         }
 225       einfo (_("%F%P: cannot find %s\n"), entry->local_sym_name);
 226     }
 227 }
 228
 229 /* Try to open NAME; if that fails, try NAME with EXTEN appended to it.  */
 230
 231 static FILE *
 232 try_open (name, exten)
 233      const char *name;
 234      const char *exten;
 235 {
 236   FILE *result;
 237   char buff[1000];
 238
 239   result = fopen (name, "r");
 240   if (trace_file_tries)
 241     {
 242       if (result == NULL)
 243         info_msg (_("cannot find script file %s\n"), name);
 244       else
 245         info_msg (_("opened script file %s\n"), name);
 246     }
 247
 248   if (result != NULL)
 249     return result;
 250
 251   if (*exten)
 252     {
 253       sprintf (buff, "%s%s", name, exten);
 254       result = fopen (buff, "r");
 255       if (trace_file_tries)
 256         {
 257           if (result == NULL)
 258             info_msg (_("cannot find script file %s\n"), buff);
 259           else
 260             info_msg (_("opened script file %s\n"), buff);
 261         }
 262     }
 263
 264   return result;
 265 }
 266
 267 /* Try to open NAME; if that fails, look for it in any directories
 268    specified with -L, without and with EXTEND apppended.  */
 269
 270 FILE *
 271 ldfile_find_command_file (name, extend)
 272      const char *name;
 273      const char *extend;
 274 {
 275   search_dirs_type *search;
 276   FILE *result;
 277   char buffer[1000];
 278
 279   /* First try raw name */
 280   result = try_open(name,"");
 281   if (result == (FILE *)NULL) {
 282     /* Try now prefixes */
 283     for (search = search_head;
 284          search != (search_dirs_type *)NULL;
 285          search = search->next) {
 286       sprintf(buffer,"%s%s%s", search->name, slash, name);
 287       result = try_open(buffer, extend);
 288       if (result)break;
 289     }
 290   }
 291   return result;
 292 }
 293
 294 void
 295 ldfile_open_command_file (name)
 296      const char *name;
 297 {
 298   FILE *ldlex_input_stack;
 299   ldlex_input_stack = ldfile_find_command_file(name, "");
 300
 301   if (ldlex_input_stack == (FILE *)NULL) {
 302     bfd_set_error (bfd_error_system_call);
 303     einfo(_("%P%F: cannot open linker script file %s: %E\n"),name);
 304   }
 305   lex_push_file(ldlex_input_stack, name);
 306
 307   ldfile_input_filename = name;
 308   lineno = 1;
 309   had_script = true;
 310 }
 311
 312
 313
 314
 315
 316 #ifdef GNU960
 317 static
 318 char *
 319 gnu960_map_archname( name )
 320 char *name;
 321 {
 322   struct tabentry { char *cmd_switch; char *arch; };
 323   static struct tabentry arch_tab[] = {
 324         "",   "",
 325         "KA", "ka",
 326         "KB", "kb",
 327         "KC", "mc",     /* Synonym for MC */
 328         "MC", "mc",
 329         "CA", "ca",
 330         "SA", "ka",     /* Functionally equivalent to KA */
 331         "SB", "kb",     /* Functionally equivalent to KB */
 332         NULL, ""
 333   };
 334   struct tabentry *tp;
 335
 336
 337   for ( tp = arch_tab; tp->cmd_switch != NULL; tp++ ){
 338     if ( !strcmp(name,tp->cmd_switch) ){
 339       break;
 340     }
 341   }
 342
 343   if ( tp->cmd_switch == NULL ){
 344     einfo(_("%P%F: unknown architecture: %s\n"),name);
 345   }
 346   return tp->arch;
 347 }
 348
 349
 350
 351 void
 352 ldfile_add_arch(name)
 353 char *name;
 354 {
 355   search_arch_type *new =
 356     (search_arch_type *)xmalloc((bfd_size_type)(sizeof(search_arch_type)));
 357
 358
 359   if (*name != '\0') {
 360     if (ldfile_output_machine_name[0] != '\0') {
 361       einfo(_("%P%F: target architecture respecified\n"));
 362       return;
 363     }
 364     ldfile_output_machine_name = name;
 365   }
 366
 367   new->next = (search_arch_type*)NULL;
 368   new->name = gnu960_map_archname( name );
 369   *search_arch_tail_ptr = new;
 370   search_arch_tail_ptr = &new->next;
 371
 372 }
 373
 374 #else   /* not GNU960 */
 375
 376
 377 void
 378 ldfile_add_arch (in_name)
 379      CONST char * in_name;
 380 {
 381   char *name = buystring(in_name);
 382   search_arch_type *new =
 383     (search_arch_type *) xmalloc (sizeof (search_arch_type));
 384
 385   ldfile_output_machine_name = in_name;
 386
 387   new->name = name;
 388   new->next = (search_arch_type*)NULL;
 389   while (*name)
 390     {
 391       if (isupper ((unsigned char) *name))
 392         *name = tolower ((unsigned char) *name);
 393       name++;
 394     }
 395   *search_arch_tail_ptr = new;
 396   search_arch_tail_ptr = &new->next;
 397
 398 }
 399 #endif
 400
 401 /* Set the output architecture */
 402 void
 403 ldfile_set_output_arch (string)
 404      CONST char *string;
 405 {
 406   const bfd_arch_info_type *arch = bfd_scan_arch(string);
 407
 408   if (arch) {
 409     ldfile_output_architecture = arch->arch;
 410     ldfile_output_machine = arch->mach;
 411     ldfile_output_machine_name = arch->printable_name;
 412   }
 413   else {
 414     einfo(_("%P%F: cannot represent machine `%s'\n"), string);
 415   }
 416 }