aboutsummaryrefslogtreecommitdiff
path: root/ld/mri.c
blob: 6db22a65be93cf5da53d5e1b63793d9643f43a45 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
/* mri.c -- handle MRI style linker scripts
   Copyright (C) 1991-2014 Free Software Foundation, Inc.
   Contributed by Steve Chamberlain <sac@cygnus.com>.

   This file is part of the GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */


/* This bit does the tree decoration when MRI style link scripts
   are parsed.  */

#include "sysdep.h"
#include "bfd.h"
#include "ld.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldmisc.h"
#include "mri.h"
#include <ldgram.h>
#include "libiberty.h"

struct section_name_struct {
  struct section_name_struct *next;
  const char *name;
  const char *alias;
  etree_type *vma;
  etree_type *align;
  etree_type *subalign;
  int ok_to_load;
};

static unsigned int symbol_truncate = 10000;
static struct section_name_struct *order;
static struct section_name_struct *only_load;
static struct section_name_struct *address;
static struct section_name_struct *alias;

static struct section_name_struct *alignment;
static struct section_name_struct *subalignment;

static struct section_name_struct **
lookup (const char *name, struct section_name_struct **list)
{
  struct section_name_struct **ptr = list;

  while (*ptr)
    {
      if (strcmp (name, (*ptr)->name) == 0)
	/* If this is a match, delete it, we only keep the last instance
	   of any name.  */
	*ptr = (*ptr)->next;
      else
	ptr = &((*ptr)->next);
    }

  *ptr = (struct section_name_struct *)
      xmalloc (sizeof (struct section_name_struct));
  return ptr;
}

static void
mri_add_to_list (struct section_name_struct **list,
		 const char *name,
		 etree_type *vma,
		 const char *zalias,
		 etree_type *align,
		 etree_type *subalign)
{
  struct section_name_struct **ptr = lookup (name, list);

  (*ptr)->name = name;
  (*ptr)->vma = vma;
  (*ptr)->next = NULL;
  (*ptr)->ok_to_load = 0;
  (*ptr)->alias = zalias;
  (*ptr)->align = align;
  (*ptr)->subalign = subalign;
}

void
mri_output_section (const char *name, etree_type *vma)
{
  mri_add_to_list (&address, name, vma, 0, 0, 0);
}

/* If any ABSOLUTE <name> are in the script, only load those files
   marked thus.  */

void
mri_only_load (const char *name)
{
  mri_add_to_list (&only_load, name, 0, 0, 0, 0);
}

void
mri_base (etree_type *exp)
{
  base = exp;
}

static int done_tree = 0;

void
mri_draw_tree (void)
{
  if (done_tree)
    return;

  /* Now build the statements for the ldlang machine.  */

  /* Attach the addresses of any which have addresses,
     and add the ones not mentioned.  */
  if (address != NULL)
    {
      struct section_name_struct *alist;
      struct section_name_struct *olist;

      if (order == NULL)
	order = address;

      for (alist = address;
	   alist != NULL;
	   alist = alist->next)
	{
	  int done = 0;

	  for (olist = order; done == 0 && olist != NULL; olist = olist->next)
	    {
	      if (strcmp (alist->name, olist->name) == 0)
		{
		  olist->vma = alist->vma;
		  done = 1;
		}
	    }

	  if (!done)
	    {
	      /* Add this onto end of order list.  */
	      mri_add_to_list (&order, alist->name, alist->vma, 0, 0, 0);
	    }
	}
    }

  /* If we're only supposed to load a subset of them in, then prune
     the list.  */
  if (only_load != NULL)
    {
      struct section_name_struct *ptr1;
      struct section_name_struct *ptr2;

      if (order == NULL)
	order = only_load;

      /* See if this name is in the list, if it is then we can load it.  */
      for (ptr1 = only_load; ptr1; ptr1 = ptr1->next)
	for (ptr2 = order; ptr2; ptr2 = ptr2->next)
	  if (strcmp (ptr2->name, ptr1->name) == 0)
	    ptr2->ok_to_load = 1;
    }
  else
    {
      /* No only load list, so everything is ok to load.  */
      struct section_name_struct *ptr;

      for (ptr = order; ptr; ptr = ptr->next)
	ptr->ok_to_load = 1;
    }

  /* Create the order of sections to load.  */
  if (order != NULL)
    {
      /* Been told to output the sections in a certain order.  */
      struct section_name_struct *p = order;

      while (p)
	{
	  struct section_name_struct *aptr;
	  etree_type *align = 0;
	  etree_type *subalign = 0;
	  struct wildcard_list *tmp;

	  /* See if an alignment has been specified.  */
	  for (aptr = alignment; aptr; aptr = aptr->next)
	    if (strcmp (aptr->name, p->name) == 0)
	      align = aptr->align;

	  for (aptr = subalignment; aptr; aptr = aptr->next)
	    if (strcmp (aptr->name, p->name) == 0)
	      subalign = aptr->subalign;

	  if (base == 0)
	    base = p->vma ? p->vma : exp_nameop (NAME, ".");

	  lang_enter_output_section_statement (p->name, base,
					       p->ok_to_load ? normal_section : noload_section,
					       align, subalign, NULL, 0, 0);
	  base = 0;
	  tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
	  tmp->next = NULL;
	  tmp->spec.name = p->name;
	  tmp->spec.exclude_name_list = NULL;
	  tmp->spec.sorted = none;
	  tmp->spec.section_flag_list = NULL;
	  lang_add_wild (NULL, tmp, FALSE);

	  /* If there is an alias for this section, add it too.  */
	  for (aptr = alias; aptr; aptr = aptr->next)
	    if (strcmp (aptr->alias, p->name) == 0)
	      {
		tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
		tmp->next = NULL;
		tmp->spec.name = aptr->name;
		tmp->spec.exclude_name_list = NULL;
		tmp->spec.sorted = none;
		tmp->spec.section_flag_list = NULL;
		lang_add_wild (NULL, tmp, FALSE);
	      }

	  lang_leave_output_section_statement (0, "*default*", NULL, NULL);

	  p = p->next;
	}
    }

  done_tree = 1;
}

void
mri_load (const char *name)
{
  base = 0;
  lang_add_input_file (name, lang_input_file_is_file_enum, NULL);
}

void
mri_order (const char *name)
{
  mri_add_to_list (&order, name, 0, 0, 0, 0);
}

void
mri_alias (const char *want, const char *is, int isn)
{
  if (!is)
    {
      char buf[20];

      /* Some sections are digits.  */
      sprintf (buf, "%d", isn);

      is = xstrdup (buf);

      if (is == NULL)
	abort ();
    }

  mri_add_to_list (&alias, is, 0, want, 0, 0);
}

void
mri_name (const char *name)
{
  lang_add_output (name, 1);
}

void
mri_format (const char *name)
{
  if (strcmp (name, "S") == 0)
    lang_add_output_format ("srec", NULL, NULL, 1);

  else if (strcmp (name, "IEEE") == 0)
    lang_add_output_format ("ieee", NULL, NULL, 1);

  else if (strcmp (name, "COFF") == 0)
    lang_add_output_format ("coff-m68k", NULL, NULL, 1);

  else
    einfo (_("%P%F: unknown format type %s\n"), name);
}

void
mri_public (const char *name, etree_type *exp)
{
  lang_add_assignment (exp_assign (name, exp, FALSE));
}

void
mri_align (const char *name, etree_type *exp)
{
  mri_add_to_list (&alignment, name, 0, 0, exp, 0);
}

void
mri_alignmod (const char *name, etree_type *exp)
{
  mri_add_to_list (&subalignment, name, 0, 0, 0, exp);
}

void
mri_truncate (unsigned int exp)
{
  symbol_truncate = exp;
}