ld/mri.c

   1 /* mri.c -- handle MRI style linker scripts
   2    Copyright 1991, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2002
   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   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 **lookup
  57   PARAMS ((const char *name, struct section_name_struct **list));
  58 static void mri_add_to_list PARAMS ((struct section_name_struct **list,
  59                                      const char *name, etree_type *vma,
  60                                      const char *zalias, etree_type *align,
  61                                      etree_type *subalign));
  62
  63 static struct section_name_struct **
  64 lookup (name, list)
  65      const char *name;
  66      struct section_name_struct **list;
  67 {
  68   struct section_name_struct **ptr = list;
  69
  70   while (*ptr)
  71     {
  72       if (strcmp (name, (*ptr)->name) == 0)
  73         /* If this is a match, delete it, we only keep the last instance
  74            of any name.  */
  75         *ptr = (*ptr)->next;
  76       else
  77         ptr = &((*ptr)->next);
  78     }
  79
  80   *ptr = (struct section_name_struct *) xmalloc (sizeof (struct section_name_struct));
  81   return ptr;
  82 }
  83
  84 static void
  85 mri_add_to_list (list, name, vma, zalias, align, subalign)
  86      struct section_name_struct **list;
  87      const char *name;
  88      etree_type *vma;
  89      const char *zalias;
  90      etree_type *align;
  91      etree_type *subalign;
  92 {
  93   struct section_name_struct **ptr = lookup (name, list);
  94
  95   (*ptr)->name = name;
  96   (*ptr)->vma = vma;
  97   (*ptr)->next = (struct section_name_struct *) NULL;
  98   (*ptr)->ok_to_load = 0;
  99   (*ptr)->alias = zalias;
 100   (*ptr)->align = align;
 101   (*ptr)->subalign = subalign;
 102 }
 103
 104 void
 105 mri_output_section (name, vma)
 106      const char *name;
 107      etree_type *vma;
 108 {
 109   mri_add_to_list (&address, name, vma, 0, 0, 0);
 110 }
 111
 112 /* If any ABSOLUTE <name> are in the script, only load those files
 113    marked thus.  */
 114
 115 void
 116 mri_only_load (name)
 117      const char *name;
 118 {
 119   mri_add_to_list (&only_load, name, 0, 0, 0, 0);
 120 }
 121
 122 void
 123 mri_base (exp)
 124      etree_type *exp;
 125 {
 126   base = exp;
 127 }
 128
 129 static int done_tree = 0;
 130
 131 void
 132 mri_draw_tree ()
 133 {
 134   if (done_tree)
 135     return;
 136
 137 #if 0   /* We don't bother with memory regions.  */
 138   /* Create the regions.  */
 139   {
 140     lang_memory_region_type *r;
 141
 142     r = lang_memory_region_lookup("long");
 143     r->current = r->origin = exp_get_vma (base, (bfd_vma)0, "origin",
 144                                           lang_first_phase_enum);
 145     r->length = (bfd_size_type) exp_get_vma (0, (bfd_vma) ~((bfd_size_type)0),
 146                                              "length", lang_first_phase_enum);
 147   }
 148 #endif
 149
 150   /* Now build the statements for the ldlang machine.  */
 151
 152   /* Attach the addresses of any which have addresses,
 153      and add the ones not mentioned.  */
 154   if (address != (struct section_name_struct *) NULL)
 155     {
 156       struct section_name_struct *alist;
 157       struct section_name_struct *olist;
 158
 159       if (order == (struct section_name_struct *) NULL)
 160         order = address;
 161
 162       for (alist = address;
 163            alist != (struct section_name_struct *) NULL;
 164            alist = alist->next)
 165         {
 166           int done = 0;
 167
 168           for (olist = order;
 169                done == 0 && olist != (struct section_name_struct *) NULL;
 170                olist = olist->next)
 171             {
 172               if (strcmp (alist->name, olist->name) == 0)
 173                 {
 174                   olist->vma = alist->vma;
 175                   done = 1;
 176                 }
 177             }
 178
 179           if (!done)
 180             {
 181               /* Add this onto end of order list.  */
 182               mri_add_to_list (&order, alist->name, alist->vma, 0, 0, 0);
 183             }
 184         }
 185     }
 186
 187   /* If we're only supposed to load a subset of them in, then prune
 188      the list.  */
 189   if (only_load != (struct section_name_struct *) NULL)
 190     {
 191       struct section_name_struct *ptr1;
 192       struct section_name_struct *ptr2;
 193
 194       if (order == (struct section_name_struct *) NULL)
 195         order = only_load;
 196
 197       /* See if this name is in the list, if it is then we can load it.  */
 198       for (ptr1 = only_load; ptr1; ptr1 = ptr1->next)
 199         for (ptr2 = order; ptr2; ptr2 = ptr2->next)
 200           if (strcmp (ptr2->name, ptr1->name) == 0)
 201             ptr2->ok_to_load = 1;
 202     }
 203   else
 204     {
 205       /* No only load list, so everything is ok to load.  */
 206       struct section_name_struct *ptr;
 207
 208       for (ptr = order; ptr; ptr = ptr->next)
 209         ptr->ok_to_load = 1;
 210     }
 211
 212   /* Create the order of sections to load.  */
 213   if (order != (struct section_name_struct *) NULL)
 214     {
 215       /* Been told to output the sections in a certain order.  */
 216       struct section_name_struct *p = order;
 217
 218       while (p)
 219         {
 220           struct section_name_struct *aptr;
 221           etree_type *align = 0;
 222           etree_type *subalign = 0;
 223           struct wildcard_list *tmp;
 224
 225           /* See if an alignment has been specified.  */
 226           for (aptr = alignment; aptr; aptr = aptr->next)
 227             if (strcmp (aptr->name, p->name) == 0)
 228               align = aptr->align;
 229
 230           for (aptr = subalignment; aptr; aptr = aptr->next)
 231             if (strcmp (aptr->name, p->name) == 0)
 232               subalign = aptr->subalign;
 233
 234           if (base == 0)
 235             base = p->vma ? p->vma : exp_nameop (NAME, ".");
 236
 237           lang_enter_output_section_statement (p->name, base,
 238                                                p->ok_to_load ? 0 : noload_section,
 239                                                1, align, subalign,
 240                                                (etree_type *) NULL);
 241           base = 0;
 242           tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
 243           tmp->next = NULL;
 244           tmp->spec.name = p->name;
 245           tmp->spec.exclude_name_list = NULL;
 246           tmp->spec.sorted = FALSE;
 247           lang_add_wild (NULL, tmp, FALSE);
 248
 249           /* If there is an alias for this section, add it too.  */
 250           for (aptr = alias; aptr; aptr = aptr->next)
 251             if (strcmp (aptr->alias, p->name) == 0)
 252               {
 253                 tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
 254                 tmp->next = NULL;
 255                 tmp->spec.name = aptr->name;
 256                 tmp->spec.exclude_name_list = NULL;
 257                 tmp->spec.sorted = FALSE;
 258                 lang_add_wild (NULL, tmp, FALSE);
 259               }
 260
 261           lang_leave_output_section_statement
 262             (0, "*default*", (struct lang_output_section_phdr_list *) NULL,
 263              NULL);
 264
 265           p = p->next;
 266         }
 267     }
 268
 269   done_tree = 1;
 270 }
 271
 272 void
 273 mri_load (name)
 274      const char *name;
 275 {
 276   base = 0;
 277   lang_add_input_file (name,
 278                        lang_input_file_is_file_enum, (char *) NULL);
 279 #if 0
 280   lang_leave_output_section_statement (0, "*default*");
 281 #endif
 282 }
 283
 284 void
 285 mri_order (name)
 286      const char *name;
 287 {
 288   mri_add_to_list (&order, name, 0, 0, 0, 0);
 289 }
 290
 291 void
 292 mri_alias (want, is, isn)
 293      const char *want;
 294      const char *is;
 295      int isn;
 296 {
 297   if (!is)
 298     {
 299       char buf[20];
 300
 301       /* Some sections are digits.  */
 302       sprintf (buf, "%d", isn);
 303
 304       is = xstrdup (buf);
 305
 306       if (is == NULL)
 307         abort ();
 308     }
 309
 310   mri_add_to_list (&alias, is, 0, want, 0, 0);
 311 }
 312
 313 void
 314 mri_name (name)
 315      const char *name;
 316 {
 317   lang_add_output (name, 1);
 318 }
 319
 320 void
 321 mri_format (name)
 322      const char *name;
 323 {
 324   if (strcmp (name, "S") == 0)
 325     lang_add_output_format ("srec", (char *) NULL, (char *) NULL, 1);
 326
 327   else if (strcmp (name, "IEEE") == 0)
 328     lang_add_output_format ("ieee", (char *) NULL, (char *) NULL, 1);
 329
 330   else if (strcmp (name, "COFF") == 0)
 331     lang_add_output_format ("coff-m68k", (char *) NULL, (char *) NULL, 1);
 332
 333   else
 334     einfo (_("%P%F: unknown format type %s\n"), name);
 335 }
 336
 337 void
 338 mri_public (name, exp)
 339      const char *name;
 340      etree_type *exp;
 341 {
 342   lang_add_assignment (exp_assop ('=', name, exp));
 343 }
 344
 345 void
 346 mri_align (name, exp)
 347      const char *name;
 348      etree_type *exp;
 349 {
 350   mri_add_to_list (&alignment, name, 0, 0, exp, 0);
 351 }
 352
 353 void
 354 mri_alignmod (name, exp)
 355      const char *name;
 356      etree_type *exp;
 357 {
 358   mri_add_to_list (&subalignment, name, 0, 0, 0, exp);
 359 }
 360
 361 void
 362 mri_truncate (exp)
 363      unsigned int exp;
 364 {
 365   symbol_truncate = exp;
 366 }