ld/mri.c

   1 /* mri.c -- handle MRI style linker scripts
   2    Copyright 1991, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2002,
   3    2003, 2004 Free Software Foundation, Inc.
   4
   5 This file is part of GLD, the Gnu Linker.
   6
   7 GLD is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GLD is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GLD; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.
  21
  22    This bit does the tree decoration when MRI style link scripts
  23    are parsed.
  24
  25    Contributed by Steve Chamberlain <sac@cygnus.com>.  */
  26
  27 #include "bfd.h"
  28 #include "sysdep.h"
  29 #include "ld.h"
  30 #include "ldexp.h"
  31 #include "ldlang.h"
  32 #include "ldmisc.h"
  33 #include "mri.h"
  34 #include <ldgram.h>
  35 #include "libiberty.h"
  36
  37 struct section_name_struct {
  38   struct section_name_struct *next;
  39   const char *name;
  40   const char *alias;
  41   etree_type *vma;
  42   etree_type *align;
  43   etree_type *subalign;
  44   int ok_to_load;
  45 };
  46
  47 unsigned int symbol_truncate = 10000;
  48 struct section_name_struct *order;
  49 struct section_name_struct *only_load;
  50 struct section_name_struct *address;
  51 struct section_name_struct *alias;
  52
  53 struct section_name_struct *alignment;
  54 struct section_name_struct *subalignment;
  55
  56 static struct section_name_struct **
  57 lookup (const char *name, struct section_name_struct **list)
  58 {
  59   struct section_name_struct **ptr = list;
  60
  61   while (*ptr)
  62     {
  63       if (strcmp (name, (*ptr)->name) == 0)
  64         /* If this is a match, delete it, we only keep the last instance
  65            of any name.  */
  66         *ptr = (*ptr)->next;
  67       else
  68         ptr = &((*ptr)->next);
  69     }
  70
  71   *ptr = xmalloc (sizeof (struct section_name_struct));
  72   return ptr;
  73 }
  74
  75 static void
  76 mri_add_to_list (struct section_name_struct **list,
  77                  const char *name,
  78                  etree_type *vma,
  79                  const char *zalias,
  80                  etree_type *align,
  81                  etree_type *subalign)
  82 {
  83   struct section_name_struct **ptr = lookup (name, list);
  84
  85   (*ptr)->name = name;
  86   (*ptr)->vma = vma;
  87   (*ptr)->next = NULL;
  88   (*ptr)->ok_to_load = 0;
  89   (*ptr)->alias = zalias;
  90   (*ptr)->align = align;
  91   (*ptr)->subalign = subalign;
  92 }
  93
  94 void
  95 mri_output_section (const char *name, etree_type *vma)
  96 {
  97   mri_add_to_list (&address, name, vma, 0, 0, 0);
  98 }
  99
 100 /* If any ABSOLUTE <name> are in the script, only load those files
 101    marked thus.  */
 102
 103 void
 104 mri_only_load (const char *name)
 105 {
 106   mri_add_to_list (&only_load, name, 0, 0, 0, 0);
 107 }
 108
 109 void
 110 mri_base (etree_type *exp)
 111 {
 112   base = exp;
 113 }
 114
 115 static int done_tree = 0;
 116
 117 void
 118 mri_draw_tree (void)
 119 {
 120   if (done_tree)
 121     return;
 122
 123 #if 0   /* We don't bother with memory regions.  */
 124   /* Create the regions.  */
 125   {
 126     lang_memory_region_type *r;
 127
 128     r = lang_memory_region_lookup("long");
 129     r->current = r->origin = exp_get_vma (base, (bfd_vma)0, "origin",
 130                                           lang_first_phase_enum);
 131     r->length = (bfd_size_type) exp_get_vma (0, ~(bfd_vma) 0, "length",
 132                                              lang_first_phase_enum);
 133   }
 134 #endif
 135
 136   /* Now build the statements for the ldlang machine.  */
 137
 138   /* Attach the addresses of any which have addresses,
 139      and add the ones not mentioned.  */
 140   if (address != NULL)
 141     {
 142       struct section_name_struct *alist;
 143       struct section_name_struct *olist;
 144
 145       if (order == NULL)
 146         order = address;
 147
 148       for (alist = address;
 149            alist != NULL;
 150            alist = alist->next)
 151         {
 152           int done = 0;
 153
 154           for (olist = order; done == 0 && olist != NULL; olist = olist->next)
 155             {
 156               if (strcmp (alist->name, olist->name) == 0)
 157                 {
 158                   olist->vma = alist->vma;
 159                   done = 1;
 160                 }
 161             }
 162
 163           if (!done)
 164             {
 165               /* Add this onto end of order list.  */
 166               mri_add_to_list (&order, alist->name, alist->vma, 0, 0, 0);
 167             }
 168         }
 169     }
 170
 171   /* If we're only supposed to load a subset of them in, then prune
 172      the list.  */
 173   if (only_load != NULL)
 174     {
 175       struct section_name_struct *ptr1;
 176       struct section_name_struct *ptr2;
 177
 178       if (order == NULL)
 179         order = only_load;
 180
 181       /* See if this name is in the list, if it is then we can load it.  */
 182       for (ptr1 = only_load; ptr1; ptr1 = ptr1->next)
 183         for (ptr2 = order; ptr2; ptr2 = ptr2->next)
 184           if (strcmp (ptr2->name, ptr1->name) == 0)
 185             ptr2->ok_to_load = 1;
 186     }
 187   else
 188     {
 189       /* No only load list, so everything is ok to load.  */
 190       struct section_name_struct *ptr;
 191
 192       for (ptr = order; ptr; ptr = ptr->next)
 193         ptr->ok_to_load = 1;
 194     }
 195
 196   /* Create the order of sections to load.  */
 197   if (order != NULL)
 198     {
 199       /* Been told to output the sections in a certain order.  */
 200       struct section_name_struct *p = order;
 201
 202       while (p)
 203         {
 204           struct section_name_struct *aptr;
 205           etree_type *align = 0;
 206           etree_type *subalign = 0;
 207           struct wildcard_list *tmp;
 208
 209           /* See if an alignment has been specified.  */
 210           for (aptr = alignment; aptr; aptr = aptr->next)
 211             if (strcmp (aptr->name, p->name) == 0)
 212               align = aptr->align;
 213
 214           for (aptr = subalignment; aptr; aptr = aptr->next)
 215             if (strcmp (aptr->name, p->name) == 0)
 216               subalign = aptr->subalign;
 217
 218           if (base == 0)
 219             base = p->vma ? p->vma : exp_nameop (NAME, ".");
 220
 221           lang_enter_output_section_statement (p->name, base,
 222                                                p->ok_to_load ? 0 : noload_section,
 223                                                align, subalign, NULL, 0);
 224           base = 0;
 225           tmp = xmalloc (sizeof *tmp);
 226           tmp->next = NULL;
 227           tmp->spec.name = p->name;
 228           tmp->spec.exclude_name_list = NULL;
 229           tmp->spec.sorted = none;
 230           lang_add_wild (NULL, tmp, FALSE);
 231
 232           /* If there is an alias for this section, add it too.  */
 233           for (aptr = alias; aptr; aptr = aptr->next)
 234             if (strcmp (aptr->alias, p->name) == 0)
 235               {
 236                 tmp = xmalloc (sizeof *tmp);
 237                 tmp->next = NULL;
 238                 tmp->spec.name = aptr->name;
 239                 tmp->spec.exclude_name_list = NULL;
 240                 tmp->spec.sorted = none;
 241                 lang_add_wild (NULL, tmp, FALSE);
 242               }
 243
 244           lang_leave_output_section_statement (0, "*default*", NULL, NULL);
 245
 246           p = p->next;
 247         }
 248     }
 249
 250   done_tree = 1;
 251 }
 252
 253 void
 254 mri_load (const char *name)
 255 {
 256   base = 0;
 257   lang_add_input_file (name, lang_input_file_is_file_enum, NULL);
 258 #if 0
 259   lang_leave_output_section_statement (0, "*default*");
 260 #endif
 261 }
 262
 263 void
 264 mri_order (const char *name)
 265 {
 266   mri_add_to_list (&order, name, 0, 0, 0, 0);
 267 }
 268
 269 void
 270 mri_alias (const char *want, const char *is, int isn)
 271 {
 272   if (!is)
 273     {
 274       char buf[20];
 275
 276       /* Some sections are digits.  */
 277       sprintf (buf, "%d", isn);
 278
 279       is = xstrdup (buf);
 280
 281       if (is == NULL)
 282         abort ();
 283     }
 284
 285   mri_add_to_list (&alias, is, 0, want, 0, 0);
 286 }
 287
 288 void
 289 mri_name (const char *name)
 290 {
 291   lang_add_output (name, 1);
 292 }
 293
 294 void
 295 mri_format (const char *name)
 296 {
 297   if (strcmp (name, "S") == 0)
 298     lang_add_output_format ("srec", NULL, NULL, 1);
 299
 300   else if (strcmp (name, "IEEE") == 0)
 301     lang_add_output_format ("ieee", NULL, NULL, 1);
 302
 303   else if (strcmp (name, "COFF") == 0)
 304     lang_add_output_format ("coff-m68k", NULL, NULL, 1);
 305
 306   else
 307     einfo (_("%P%F: unknown format type %s\n"), name);
 308 }
 309
 310 void
 311 mri_public (const char *name, etree_type *exp)
 312 {
 313   lang_add_assignment (exp_assop ('=', name, exp));
 314 }
 315
 316 void
 317 mri_align (const char *name, etree_type *exp)
 318 {
 319   mri_add_to_list (&alignment, name, 0, 0, exp, 0);
 320 }
 321
 322 void
 323 mri_alignmod (const char *name, etree_type *exp)
 324 {
 325   mri_add_to_list (&subalignment, name, 0, 0, 0, exp);
 326 }
 327
 328 void
 329 mri_truncate (unsigned int exp)
 330 {
 331   symbol_truncate = exp;
 332 }