ld/ldfile.c

   1
   2 /* Copyright (C) 1991 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 1, 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 /*
  21  ldfile.c
  22
  23  look after all the file stuff
  24
  25  */
  26
  27 #include "bfd.h"
  28 #include "sysdep.h"
  29 #include "ld.h"
  30 #include "ldmisc.h"
  31 #include "ldexp.h"
  32 #include "ldlang.h"
  33 #include "ldfile.h"
  34 #include "ldmain.h"
  35 #include "ldlex.h"
  36
  37 #include <ctype.h>
  38
  39 char *ldfile_input_filename;
  40 const char *ldfile_output_machine_name = "";
  41 unsigned long ldfile_output_machine;
  42 enum bfd_architecture ldfile_output_architecture;
  43
  44 /* start-sanitize-mpw */
  45 #ifndef MPW
  46 /* end-sanitize-mpw */
  47 #ifdef VMS
  48 char *slash = "";
  49 #else
  50 char *slash = "/";
  51 #endif
  52 /* start-sanitize-mpw */
  53 #else /* MPW */
  54 /* The MPW path char is a colon. */
  55 char *slash = ":";
  56 #endif /* MPW */
  57 /* end-sanitize-mpw */
  58
  59
  60
  61
  62 /* LOCAL */
  63 typedef struct search_dirs
  64 {
  65   char *name;
  66   struct search_dirs *next;
  67 } search_dirs_type;
  68
  69 static search_dirs_type *search_head;
  70 static search_dirs_type **search_tail_ptr = &search_head;
  71
  72 typedef struct search_arch
  73 {
  74   char *name;
  75   struct search_arch *next;
  76 } search_arch_type;
  77
  78 static search_arch_type *search_arch_head;
  79 static search_arch_type **search_arch_tail_ptr = &search_arch_head;
  80
  81 static bfd *cached_bfd_openr PARAMS ((const char *attempt,
  82                                       lang_input_statement_type *entry));
  83 static bfd *open_a PARAMS ((char *arch, lang_input_statement_type *entry,
  84                             char *lib, char *suffix));
  85 static FILE *try_open PARAMS ((char *name, char *exten));
  86
  87 void
  88 ldfile_add_library_path(name)
  89 char *name;
  90 {
  91   search_dirs_type *new =
  92     (search_dirs_type *)ldmalloc((bfd_size_type)(sizeof(search_dirs_type)));
  93   new->name = name;
  94   new->next = (search_dirs_type*)NULL;
  95   *search_tail_ptr = new;
  96   search_tail_ptr = &new->next;
  97 }
  98
  99
 100 static bfd *
 101 cached_bfd_openr(attempt,entry)
 102      const char *attempt;
 103      lang_input_statement_type  *entry;
 104 {
 105   entry->the_bfd = bfd_openr(attempt, entry->target);
 106   if (trace_file_tries == true ) {
 107     info_msg ("attempt to open %s %s\n", attempt,
 108                 (entry->the_bfd == (bfd *)NULL) ? "failed" : "succeeded" );
 109   }
 110   return entry->the_bfd;
 111 }
 112
 113 static bfd *
 114 open_a(arch, entry, lib, suffix)
 115      char *arch;
 116      lang_input_statement_type *entry;
 117      char *lib;
 118      char *suffix;
 119 {
 120   bfd*desc;
 121   search_dirs_type *search ;
 122   for (search = search_head;
 123        search != (search_dirs_type *)NULL;
 124        search = search->next)
 125     {
 126       char buffer[1000];
 127       char *string;
 128       if (entry->is_archive == true) {
 129         sprintf(buffer,
 130                 "%s%s%s%s%s%s",
 131                 search->name,
 132                 slash,
 133                 lib,
 134                 entry->filename, arch, suffix);
 135       }
 136       else {
 137         if (entry->filename[0] == '/' || entry->filename[0] == '.') {
 138           strcpy(buffer, entry->filename);
 139         } else {
 140           sprintf(buffer,"%s%s%s",search->name, slash, entry->filename);
 141         }
 142       }
 143       string = buystring(buffer);
 144       desc = cached_bfd_openr (string, entry);
 145       if (desc)
 146         {
 147           entry->filename = string;
 148           entry->search_dirs_flag = false;
 149           entry->the_bfd =  desc;
 150           return desc;
 151         }
 152       free(string);
 153     }
 154   return (bfd *)NULL;
 155 }
 156
 157 /* Open the input file specified by 'entry', and return a descriptor.
 158    The open file is remembered; if the same file is opened twice in a row,
 159    a new open is not actually done.  */
 160
 161 void
 162 ldfile_open_file (entry)
 163 lang_input_statement_type *entry;
 164 {
 165
 166   if (entry->superfile)
 167     ldfile_open_file (entry->superfile);
 168
 169   if (entry->search_dirs_flag)
 170     {
 171       search_arch_type *arch;
 172       /* Try to open <filename><suffix> or lib<filename><suffix>.a */
 173
 174       for (arch = search_arch_head;
 175            arch != (search_arch_type *)NULL;
 176            arch = arch->next) {
 177         if (open_a(arch->name,entry,"lib",".a") != (bfd *)NULL) {
 178           return;
 179         }
 180 #ifdef VMS
 181         if (open_a(arch->name,entry,":lib",".a") != (bfd *)NULL) {
 182           return;
 183         }
 184 #endif
 185
 186       }
 187
 188     }
 189   else {
 190     entry->the_bfd = cached_bfd_openr (entry->filename, entry);
 191   }
 192
 193   if (!entry->the_bfd)
 194     einfo("%F%P: cannot open %s: %E\n", entry->local_sym_name);
 195 }
 196
 197
 198 /* Try to open NAME; if that fails, try NAME with EXTEN appended to it.  */
 199
 200 static FILE *
 201 try_open(name, exten)
 202      char *name;
 203      char *exten;
 204 {
 205   FILE *result;
 206   char buff[1000];
 207
 208   result = fopen(name, "r");
 209   if (trace_file_tries == true) {
 210     if (result == (FILE *)NULL) {
 211       info_msg ("cannot find ");
 212     }
 213     info_msg ("%s\n",name);
 214   }
 215   if (result != (FILE *)NULL) {
 216     return result;
 217   }
 218
 219   if (*exten) {
 220     sprintf(buff, "%s%s", name, exten);
 221     result = fopen(buff, "r");
 222     if (trace_file_tries == true) {
 223       if (result == (FILE *)NULL) {
 224         info_msg ("cannot find ");
 225       }
 226       info_msg ("%s\n", buff);
 227     }
 228   }
 229   return result;
 230 }
 231
 232 /* Try to open NAME; if that fails, look for it in any directories
 233    specified with -L, without and with EXTEND apppended.  */
 234
 235 FILE *
 236 ldfile_find_command_file(name, extend)
 237 char *name;
 238 char *extend;
 239 {
 240   search_dirs_type *search;
 241   FILE *result;
 242   char buffer[1000];
 243
 244   /* First try raw name */
 245   result = try_open(name,"");
 246   if (result == (FILE *)NULL) {
 247     /* Try now prefixes */
 248     for (search = search_head;
 249          search != (search_dirs_type *)NULL;
 250          search = search->next) {
 251       sprintf(buffer,"%s/%s", search->name, name);
 252       result = try_open(buffer, extend);
 253       if (result)break;
 254     }
 255   }
 256   return result;
 257 }
 258
 259 void
 260 ldfile_open_command_file(name)
 261 char *name;
 262 {
 263   FILE *ldlex_input_stack;
 264   ldlex_input_stack = ldfile_find_command_file(name, "");
 265
 266   if (ldlex_input_stack == (FILE *)NULL) {
 267     einfo("%P%F: cannot open linker script file %s: %E\n",name);
 268   }
 269   lex_push_file(ldlex_input_stack, name);
 270
 271   ldfile_input_filename = name;
 272   had_script = true;
 273 }
 274
 275
 276
 277
 278
 279 #ifdef GNU960
 280 static
 281 char *
 282 gnu960_map_archname( name )
 283 char *name;
 284 {
 285   struct tabentry { char *cmd_switch; char *arch; };
 286   static struct tabentry arch_tab[] = {
 287         "",   "",
 288         "KA", "ka",
 289         "KB", "kb",
 290         "KC", "mc",     /* Synonym for MC */
 291         "MC", "mc",
 292         "CA", "ca",
 293         "SA", "ka",     /* Functionally equivalent to KA */
 294         "SB", "kb",     /* Functionally equivalent to KB */
 295         NULL, ""
 296   };
 297   struct tabentry *tp;
 298
 299
 300   for ( tp = arch_tab; tp->cmd_switch != NULL; tp++ ){
 301     if ( !strcmp(name,tp->cmd_switch) ){
 302       break;
 303     }
 304   }
 305
 306   if ( tp->cmd_switch == NULL ){
 307     einfo("%P%F: unknown architecture: %s\n",name);
 308   }
 309   return tp->arch;
 310 }
 311
 312
 313
 314 void
 315 ldfile_add_arch(name)
 316 char *name;
 317 {
 318   search_arch_type *new =
 319     (search_arch_type *)ldmalloc((bfd_size_type)(sizeof(search_arch_type)));
 320
 321
 322   if (*name != '\0') {
 323     if (ldfile_output_machine_name[0] != '\0') {
 324       einfo("%P%F: target architecture respecified\n");
 325       return;
 326     }
 327     ldfile_output_machine_name = name;
 328   }
 329
 330   new->next = (search_arch_type*)NULL;
 331   new->name = gnu960_map_archname( name );
 332   *search_arch_tail_ptr = new;
 333   search_arch_tail_ptr = &new->next;
 334
 335 }
 336
 337 #else   /* not GNU960 */
 338
 339
 340 void
 341 ldfile_add_arch (in_name)
 342      CONST char * in_name;
 343 {
 344   char *name = buystring(in_name);
 345   search_arch_type *new =
 346     (search_arch_type *)ldmalloc((bfd_size_type)(sizeof(search_arch_type)));
 347
 348   ldfile_output_machine_name = in_name;
 349
 350   new->name = name;
 351   new->next = (search_arch_type*)NULL;
 352   while (*name) {
 353     if (isupper(*name)) *name = tolower(*name);
 354     name++;
 355   }
 356   *search_arch_tail_ptr = new;
 357   search_arch_tail_ptr = &new->next;
 358
 359 }
 360 #endif
 361
 362 /* Set the output architecture */
 363 void
 364 ldfile_set_output_arch (string)
 365      CONST char *string;
 366 {
 367   bfd_arch_info_type *arch = bfd_scan_arch(string);
 368
 369   if (arch) {
 370     ldfile_output_architecture = arch->arch;
 371     ldfile_output_machine = arch->mach;
 372     ldfile_output_machine_name = arch->printable_name;
 373   }
 374   else {
 375     einfo("%P%F: cannot represent machine `%s'\n", string);
 376   }
 377 }