ld/mri.c

   1 /* mri.c -- handle MRI style linker scripts
   2    Copyright 1991, 92, 93, 94, 95, 96, 1997, 1998, 2000
   3    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 {
  39   struct section_name_struct *next;
  40   CONST char *name;
  41   CONST char *alias;
  42   etree_type *vma;
  43   etree_type *align;
  44   etree_type *subalign;
  45   int ok_to_load;
  46 };
  47
  48 unsigned int symbol_truncate = 10000;
  49 struct section_name_struct *order;
  50 struct section_name_struct *only_load;
  51 struct section_name_struct *address;
  52 struct section_name_struct *alias;
  53
  54 struct section_name_struct *alignment;
  55 struct section_name_struct *subalignment;
  56
  57 static struct section_name_struct **lookup
  58   PARAMS ((const char *name, struct section_name_struct **list));
  59 static void mri_add_to_list PARAMS ((struct section_name_struct **list,
  60                                      const char *name, etree_type *vma,
  61                                      const char *zalias, etree_type *align,
  62                                      etree_type *subalign));
  63
  64 static struct section_name_struct **
  65 lookup (name, list)
  66      CONST char *name;
  67      struct section_name_struct **list;
  68 {
  69   struct section_name_struct **ptr = list;
  70
  71   while (*ptr)
  72     {
  73       if (strcmp (name, (*ptr)->name) == 0)
  74         /* If this is a match, delete it, we only keep the last instance
  75            of any name.  */
  76         *ptr = (*ptr)->next;
  77       else
  78         ptr = &((*ptr)->next);
  79     }
  80
  81   *ptr = (struct section_name_struct *) xmalloc (sizeof (struct section_name_struct));
  82   return ptr;
  83 }
  84
  85 static void
  86 mri_add_to_list (list, name, vma, zalias, align, subalign)
  87      struct section_name_struct **list;
  88      CONST char *name;
  89      etree_type *vma;
  90      CONST char *zalias;
  91      etree_type *align;
  92      etree_type *subalign;
  93 {
  94   struct section_name_struct **ptr = lookup (name,list);
  95
  96   (*ptr)->name = name;
  97   (*ptr)->vma = vma;
  98   (*ptr)->next = (struct section_name_struct *) NULL;
  99   (*ptr)->ok_to_load = 0;
 100   (*ptr)->alias = zalias;
 101   (*ptr)->align = align;
 102   (*ptr)->subalign = subalign;
 103 }
 104
 105 void
 106 mri_output_section (name, vma)
 107      CONST char *name;
 108      etree_type *vma;
 109 {
 110   mri_add_to_list (& address, name, vma, 0,0,0);
 111 }
 112
 113 /* If any ABSOLUTE <name> are in the script, only load those files
 114    marked thus.  */
 115
 116 void
 117 mri_only_load (name)
 118      CONST char *name;
 119 {
 120   mri_add_to_list (&only_load, name, 0, 0,0,0);
 121 }
 122
 123 void
 124 mri_base (exp)
 125      etree_type *exp;
 126 {
 127   base = exp;
 128 }
 129
 130 static int done_tree = 0;
 131
 132 void
 133 mri_draw_tree ()
 134 {
 135   if (done_tree)
 136     return;
 137
 138 #if 0   /* We don't bother with memory regions.  */
 139   /* Create the regions.  */
 140   {
 141     lang_memory_region_type *r;
 142
 143     r = lang_memory_region_lookup("long");
 144     r->current = r->origin = exp_get_vma (base, (bfd_vma)0, "origin",
 145                                           lang_first_phase_enum);
 146     r->length = (bfd_size_type) exp_get_vma (0, (bfd_vma) ~((bfd_size_type)0),
 147                                              "length", lang_first_phase_enum);
 148   }
 149 #endif
 150
 151   /* Now build the statements for the ldlang machine.  */
 152
 153   /* Attatch the addresses of any which have addresses,
 154      and add the ones not mentioned.  */
 155   if (address != (struct section_name_struct *)NULL)
 156     {
 157       struct section_name_struct *alist;
 158       struct section_name_struct *olist;
 159
 160       if (order == (struct section_name_struct *)NULL)
 161         order = address;
 162
 163       for (alist = address;
 164            alist != (struct section_name_struct*)NULL;
 165            alist = alist->next)
 166         {
 167           int done = 0;
 168
 169           for (olist = order;
 170                done == 0 &&
 171                  olist != (struct section_name_struct *)NULL;
 172                olist = olist->next)
 173             {
 174               if (strcmp (alist->name, olist->name) == 0)
 175                 {
 176                   olist->vma = alist->vma;
 177                   done = 1;
 178                 }
 179             }
 180
 181           if (!done)
 182             {
 183               /* Add this onto end of order list.  */
 184               mri_add_to_list (& order, alist->name, alist->vma, 0,0,0);
 185             }
 186         }
 187     }
 188
 189   /* If we're only supposed to load a subset of them in, then prune
 190      the list.  */
 191   if (only_load != (struct section_name_struct *)NULL)
 192     {
 193       struct section_name_struct *ptr1;
 194       struct section_name_struct *ptr2;
 195
 196       if (order == (struct section_name_struct*)NULL)
 197         order = only_load;
 198
 199       /* See if this name is in the list, if it is then we can load it.  */
 200       for (ptr1 = only_load; ptr1; ptr1 = ptr1->next)
 201         for (ptr2 = order; ptr2; ptr2 = ptr2->next)
 202           if (strcmp (ptr2->name, ptr1->name) == 0)
 203             ptr2->ok_to_load = 1;
 204     }
 205   else
 206     {
 207       /* No only load list, so everything is ok to load.  */
 208       struct section_name_struct *ptr;
 209
 210       for (ptr = order; ptr; ptr=ptr->next)
 211         ptr->ok_to_load = 1;
 212   }
 213
 214   /* Create the order of sections to load.  */
 215   if (order != (struct section_name_struct *)NULL)
 216     {
 217       /* Been told to output the sections in a certain order.  */
 218       struct section_name_struct *p = order;
 219
 220       while (p)
 221         {
 222           struct section_name_struct *aptr;
 223           etree_type *align = 0;
 224           etree_type *subalign = 0;
 225
 226           /* See if an alignment has been specified.  */
 227           for (aptr = alignment; aptr; aptr= aptr->next)
 228             if (strcmp (aptr->name, p->name) == 0)
 229               align =  aptr->align;
 230
 231           for (aptr = subalignment; aptr; aptr= aptr->next)
 232             if (strcmp (aptr->name, p->name) == 0)
 233               subalign =  aptr->subalign;
 234
 235           if (base == 0)
 236             base = p->vma ? p->vma :exp_nameop (NAME, ".");
 237
 238           lang_enter_output_section_statement (p->name, base,
 239                                                p->ok_to_load ? 0 : noload_section,
 240                                                1, align, subalign,
 241                                                (etree_type *) NULL);
 242           base = 0;
 243           lang_add_wild (p->name, false, (char *)NULL, false, false, NULL);
 244
 245           /* If there is an alias for this section, add it too.  */
 246           for (aptr = alias; aptr; aptr = aptr->next)
 247             if (strcmp (aptr->alias, p->name) == 0)
 248               lang_add_wild (aptr->name, false, (char *)NULL, false, false, NULL);
 249
 250           lang_leave_output_section_statement
 251             (0, "*default*", (struct lang_output_section_phdr_list *) NULL,
 252              "*default*");
 253
 254           p = p->next;
 255         }
 256     }
 257
 258   done_tree = 1;
 259 }
 260
 261 void
 262 mri_load (name)
 263      CONST char *name;
 264 {
 265   base = 0;
 266   lang_add_input_file (name,
 267                        lang_input_file_is_file_enum, (char *)NULL);
 268 #if 0
 269   lang_leave_output_section_statement (0,"*default*");
 270 #endif
 271 }
 272
 273 void
 274 mri_order (name)
 275      CONST char *name;
 276 {
 277   mri_add_to_list (& order, name, 0, 0,0,0);
 278 }
 279
 280 void
 281 mri_alias (want, is, isn)
 282      CONST char *want;
 283      CONST char *is;
 284      int isn;
 285 {
 286   if (!is)
 287     {
 288       char buf[20];
 289
 290       /* Some sections are digits.  */
 291       sprintf (buf, "%d", isn);
 292
 293       is = xstrdup (buf);
 294
 295       if (is == NULL)
 296         abort ();
 297     }
 298
 299   mri_add_to_list (& alias, is, 0, want,0,0);
 300 }
 301
 302 void
 303 mri_name (name)
 304      CONST char *name;
 305 {
 306   lang_add_output (name, 1);
 307 }
 308
 309 void
 310 mri_format (name)
 311      CONST char *name;
 312 {
 313   if (strcmp (name, "S") == 0)
 314     lang_add_output_format ("srec", (char *) NULL, (char *) NULL, 1);
 315
 316   else if (strcmp (name, "IEEE") == 0)
 317     lang_add_output_format ("ieee", (char *) NULL, (char *) NULL, 1);
 318
 319   else if (strcmp (name, "COFF") == 0)
 320     lang_add_output_format ("coff-m68k", (char *) NULL, (char *) NULL, 1);
 321
 322   else
 323     einfo (_("%P%F: unknown format type %s\n"), name);
 324 }
 325
 326 void
 327 mri_public (name, exp)
 328      CONST char *name;
 329      etree_type *exp;
 330 {
 331   lang_add_assignment (exp_assop ('=', name, exp));
 332 }
 333
 334 void
 335 mri_align (name, exp)
 336      CONST char *name;
 337      etree_type *exp;
 338 {
 339   mri_add_to_list (& alignment, name, 0, 0, exp, 0);
 340 }
 341
 342 void
 343 mri_alignmod (name, exp)
 344      CONST char *name;
 345      etree_type *exp;
 346 {
 347   mri_add_to_list (& subalignment, name, 0, 0, 0, exp);
 348 }
 349
 350 void
 351 mri_truncate (exp)
 352      unsigned int exp;
 353 {
 354   symbol_truncate = exp;
 355 }
 356