File: elf32-or32.c

package info (click to toggle)
binutils 2.20.1-16%2Bdeb6u2
  • links: PTS
  • area: main
  • in suites: squeeze-lts
  • size: 150,384 kB
  • ctags: 159,283
  • sloc: ansic: 1,008,941; asm: 331,431; cpp: 57,499; makefile: 57,005; exp: 52,179; sh: 27,598; yacc: 11,652; lisp: 10,561; perl: 1,632; lex: 1,585; pascal: 307; sed: 195; python: 154; awk: 26
file content (514 lines) | stat: -rw-r--r-- 15,704 bytes parent folder | download | duplicates (15)
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
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
/* OR32-specific support for 32-bit ELF
   Copyright 2002, 2004, 2005, 2007 Free Software Foundation, Inc.
   Contributed by Ivan Guzvinec  <ivang@opencores.org>

   This file is part of BFD, the Binary File Descriptor library.

   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.  */

#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/or32.h"
#include "libiberty.h"

/* Try to minimize the amount of space occupied by relocation tables
   on the ROM (not that the ROM won't be swamped by other ELF overhead).  */
#define USE_REL	1

/* Set the right machine number for an OR32 ELF file.  */

static bfd_boolean
or32_elf_object_p (bfd *abfd)
{
  (void) bfd_default_set_arch_mach (abfd, bfd_arch_or32, 0);
  return TRUE;
}

/* The final processing done just before writing out an OR32 ELF object file.
   This gets the OR32 architecture right based on the machine number.  */

static void
or32_elf_final_write_processing (bfd *abfd,
				 bfd_boolean linker ATTRIBUTE_UNUSED)
{
  elf_elfheader (abfd)->e_flags &=~ EF_OR32_MACH;
}

static bfd_reloc_status_type
or32_elf_32_reloc (bfd *abfd,
		   arelent *reloc_entry,
		   asymbol *symbol,
		   void * data,
		   asection *input_section,
		   bfd *output_bfd,
		   char **error_message ATTRIBUTE_UNUSED)
{
  if (output_bfd != NULL)
    {
      unsigned long insn;
      bfd_size_type addr = reloc_entry->address;

      reloc_entry->address += input_section->output_offset;

      insn = bfd_get_32 (abfd, (bfd_byte *) data + addr);
      insn += symbol->section->output_section->vma;
      insn += symbol->section->output_offset;
      insn += symbol->value;
      bfd_put_32 (abfd, insn, (bfd_byte *) data + addr);

      return bfd_reloc_ok;
    }

  return bfd_reloc_continue;
}

static bfd_reloc_status_type
or32_elf_16_reloc (bfd *abfd,
		   arelent *reloc_entry,
		   asymbol *symbol,
		   void * data,
		   asection *input_section,
		   bfd *output_bfd,
		   char **error_message ATTRIBUTE_UNUSED)
{
  if (output_bfd != NULL)
    {
      unsigned short insn;
      bfd_size_type addr = reloc_entry->address;

      reloc_entry->address += input_section->output_offset;

      insn = bfd_get_16 (abfd, (bfd_byte *) data + addr);
      insn += symbol->section->output_section->vma;
      insn += symbol->section->output_offset;
      insn += symbol->value;
      bfd_put_16 (abfd, insn, (bfd_byte *) data + addr);

      return bfd_reloc_ok;
    }

  return bfd_reloc_continue;
}

static bfd_reloc_status_type
or32_elf_8_reloc (bfd *abfd ATTRIBUTE_UNUSED,
		  arelent *reloc_entry,
		  asymbol *symbol,
		  void * data,
		  asection *input_section,
		  bfd *output_bfd,
		  char **error_message ATTRIBUTE_UNUSED)
{
  if (output_bfd != NULL)
    {
      unsigned char insn;
      bfd_size_type addr = reloc_entry->address;

      reloc_entry->address += input_section->output_offset;

      insn = bfd_get_8 (abfd, (bfd_byte *) data + addr);
      insn += symbol->section->output_section->vma;
      insn += symbol->section->output_offset;
      insn += symbol->value;
      bfd_put_8 (abfd, insn, (bfd_byte *) data + addr);

      return bfd_reloc_ok;
    }

  return bfd_reloc_continue;
}

/* Do a R_OR32_CONSTH relocation.  This has to be done in combination
   with a R_OR32_CONST reloc, because there is a carry from the LO16 to
   the HI16.  Here we just save the information we need; we do the
   actual relocation when we see the LO16.  OR32 ELF requires that the
   LO16 immediately follow the HI16.  As a GNU extension, we permit an
   arbitrary number of HI16 relocs to be associated with a single LO16
   reloc.  This extension permits gcc to output the HI and LO relocs
   itself. This code is copied from the elf32-mips.c.  */

struct or32_consth
{
  struct or32_consth *next;
  bfd_byte *addr;
  bfd_vma addend;
};

/* FIXME: This should not be a static variable.  */

static struct or32_consth *or32_consth_list;

static bfd_reloc_status_type
or32_elf_consth_reloc (bfd *abfd ATTRIBUTE_UNUSED,
		       arelent *reloc_entry,
		       asymbol *symbol,
		       void * data,
		       asection *input_section,
		       bfd *output_bfd,
		       char **error_message ATTRIBUTE_UNUSED)
{
  bfd_reloc_status_type ret;
  bfd_vma relocation;
  struct or32_consth *n;

  ret = bfd_reloc_ok;

  if (bfd_is_und_section (symbol->section)
      && output_bfd == NULL)
    ret = bfd_reloc_undefined;

  if (bfd_is_com_section (symbol->section))
    relocation = 0;
  else
    relocation = symbol->value;

  relocation += symbol->section->output_section->vma;
  relocation += symbol->section->output_offset;
  relocation += reloc_entry->addend;

  if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
    return bfd_reloc_outofrange;

  /* Save the information, and let LO16 do the actual relocation.  */
  n = bfd_malloc (sizeof *n);
  if (n == NULL)
    return bfd_reloc_outofrange;
  n->addr = (bfd_byte *) data + reloc_entry->address;
  n->addend = relocation;
  n->next = or32_consth_list;
  or32_consth_list = n;

  if (output_bfd != NULL)
    reloc_entry->address += input_section->output_offset;

  return ret;
}

/* Do a R_OR32_CONST relocation.  This is a straightforward 16 bit
   inplace relocation; this function exists in order to do the
   R_OR32_CONSTH relocation described above.  */

static bfd_reloc_status_type
or32_elf_const_reloc (bfd *abfd,
		      arelent *reloc_entry,
		      asymbol *symbol,
		      void * data,
		      asection *input_section,
		      bfd *output_bfd,
		      char **error_message)
{
  if (or32_consth_list != NULL)
    {
      struct or32_consth *l;

      l = or32_consth_list;
      while (l != NULL)
	{
	  unsigned long insn;
	  unsigned long val;
          unsigned long vallo;
	  struct or32_consth *next;

	  /* Do the HI16 relocation.  Note that we actually don't need
	     to know anything about the LO16 itself, except where to
	     find the low 16 bits of the addend needed by the LO16.  */
	  insn = bfd_get_32 (abfd, l->addr);
	  vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
		   & 0xffff);
	  val = ((insn & 0xffff) << 16) + vallo;
	  val += l->addend;

	  insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff);
	  bfd_put_32 (abfd, insn, l->addr);

	  next = l->next;
	  free (l);
	  l = next;
	}

      or32_consth_list = NULL;
    }

  if (output_bfd != NULL)
    {
      unsigned long insn, tmp;
      bfd_size_type addr = reloc_entry->address;

      reloc_entry->address += input_section->output_offset;

      insn = bfd_get_32 (abfd, (bfd_byte *) data + addr);
      tmp = insn & 0x0000ffff;
      tmp += symbol->section->output_section->vma;
      tmp += symbol->section->output_offset;
      tmp += symbol->value;
      insn = (insn & 0xffff0000) | (tmp & 0x0000ffff);
      bfd_put_32 (abfd, insn, (bfd_byte *) data + addr);

      return bfd_reloc_ok;
    }

  /* Now do the LO16 reloc in the usual way.  */
  return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
				input_section, output_bfd, error_message);
}

static bfd_reloc_status_type
or32_elf_jumptarg_reloc (bfd *abfd,
			 arelent *reloc_entry,
			 asymbol *symbol ATTRIBUTE_UNUSED,
			 void * data,
			 asection *input_section,
			 bfd *output_bfd,
			 char **error_message ATTRIBUTE_UNUSED)
{
  if (output_bfd != NULL)
    {
      unsigned long insn, tmp;
      bfd_size_type addr = reloc_entry->address;

      reloc_entry->address += input_section->output_offset;

      insn = bfd_get_32 (abfd, (bfd_byte *) data + addr);
      tmp = insn | 0xfc000000;
      tmp -= (input_section->output_offset >> 2);
      insn = (insn & 0xfc000000) | (tmp & 0x03ffffff);
      bfd_put_32 (abfd, insn, (bfd_byte *) data + addr);

      return bfd_reloc_ok;
    }

  return bfd_reloc_continue;
}

static reloc_howto_type elf_or32_howto_table[] =
{
  /* This reloc does nothing.  */
  HOWTO (R_OR32_NONE,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 32,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_OR32_NONE",		/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* A standard 32 bit relocation.  */
  HOWTO (R_OR32_32,		/* type */
	 0,	                /* rightshift */
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */
	 32,	                /* bitsize */
	 FALSE,	                /* pc_relative */
	 0,	                /* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 or32_elf_32_reloc, 	/* special_function */
	 "R_OR32_32",		/* name */
	 FALSE,	                /* partial_inplace */
	 0xffffffff,	        /* src_mask */
	 0xffffffff,   		/* dst_mask */
	 FALSE),                /* pcrel_offset */

  /* A standard 16 bit relocation.  */
  HOWTO (R_OR32_16,		/* type */
	 0,	                /* rightshift */
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */
	 16,	                /* bitsize */
	 FALSE,	                /* pc_relative */
	 0,	                /* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 or32_elf_16_reloc, 	/* special_function */
	 "R_OR32_16",		/* name */
	 FALSE,	                /* partial_inplace */
	 0x0000ffff,	        /* src_mask */
	 0x0000ffff,   		/* dst_mask */
	 FALSE),                /* pcrel_offset */

  /* A standard 8 bit relocation.  */
  HOWTO (R_OR32_8,		/* type */
	 0,	                /* rightshift */
	 0,	                /* size (0 = byte, 1 = short, 2 = long) */
	 8,	                /* bitsize */
	 FALSE,	                /* pc_relative */
	 0,	                /* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 or32_elf_8_reloc, 	/* special_function */
	 "R_OR32_8",		/* name */
	 FALSE,	                /* partial_inplace */
	 0x000000ff,	        /* src_mask */
	 0x000000ff,   		/* dst_mask */
	 FALSE),                /* pcrel_offset */

  /* A standard low 16 bit relocation.  */
  HOWTO (R_OR32_CONST,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 or32_elf_const_reloc,	/* special_function */
	 "R_OR32_CONST",	/* name */
	 FALSE,			/* partial_inplace */
	 0x0000ffff,		/* src_mask */
	 0x0000ffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* A standard high 16 bit relocation.  */
  HOWTO (R_OR32_CONSTH,		/* type */
	 16,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 TRUE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 or32_elf_consth_reloc,	/* special_function */
	 "R_OR32_CONSTH",	/* name */
	 FALSE,			/* partial_inplace */
	 0xffff0000,		/* src_mask */
	 0x0000ffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* A standard branch relocation.  */
  HOWTO (R_OR32_JUMPTARG,	/* type */
	 2,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 28,			/* bitsize */
	 TRUE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 or32_elf_jumptarg_reloc,/* special_function */
	 "R_OR32_JUMPTARG",	/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0x03ffffff,		/* dst_mask */
	 TRUE), 		/* pcrel_offset */

  /* GNU extension to record C++ vtable hierarchy.  */
  HOWTO (R_OR32_GNU_VTINHERIT, /* type */
         0,                     /* rightshift */
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
         0,                     /* bitsize */
         FALSE,                 /* pc_relative */
         0,                     /* bitpos */
         complain_overflow_dont, /* complain_on_overflow */
         NULL,                  /* special_function */
         "R_OR32_GNU_VTINHERIT", /* name */
         FALSE,                 /* partial_inplace */
         0,                     /* src_mask */
         0,                     /* dst_mask */
         FALSE),                /* pcrel_offset */

  /* GNU extension to record C++ vtable member usage.  */
  HOWTO (R_OR32_GNU_VTENTRY,     /* type */
         0,                     /* rightshift */
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
         0,                     /* bitsize */
         FALSE,                 /* pc_relative */
         0,                     /* bitpos */
         complain_overflow_dont, /* complain_on_overflow */
         _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
         "R_OR32_GNU_VTENTRY",   /* name */
         FALSE,                 /* partial_inplace */
         0,                     /* src_mask */
         0,                     /* dst_mask */
         FALSE),                /* pcrel_offset */
};

/* Map BFD reloc types to OR32 ELF reloc types.  */

struct or32_reloc_map
{
  bfd_reloc_code_real_type  bfd_reloc_val;
  unsigned char             elf_reloc_val;
};

static const struct or32_reloc_map or32_reloc_map[] =
{
  { BFD_RELOC_NONE, R_OR32_NONE },
  { BFD_RELOC_32, R_OR32_32 },
  { BFD_RELOC_16, R_OR32_16 },
  { BFD_RELOC_8, R_OR32_8 },
  { BFD_RELOC_LO16, R_OR32_CONST },
  { BFD_RELOC_HI16, R_OR32_CONSTH },
  { BFD_RELOC_32_GOT_PCREL, R_OR32_JUMPTARG },
  { BFD_RELOC_VTABLE_INHERIT, R_OR32_GNU_VTINHERIT },
  { BFD_RELOC_VTABLE_ENTRY, R_OR32_GNU_VTENTRY },
};

static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
				 bfd_reloc_code_real_type code)
{
  unsigned int i;

  for (i = ARRAY_SIZE (or32_reloc_map); i--;)
    if (or32_reloc_map[i].bfd_reloc_val == code)
      return &elf_or32_howto_table[or32_reloc_map[i].elf_reloc_val];

  return NULL;
}

static reloc_howto_type *
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
				 const char *r_name)
{
  unsigned int i;

  for (i = 0;
       i < sizeof (elf_or32_howto_table) / sizeof (elf_or32_howto_table[0]);
       i++)
    if (elf_or32_howto_table[i].name != NULL
	&& strcasecmp (elf_or32_howto_table[i].name, r_name) == 0)
      return &elf_or32_howto_table[i];

  return NULL;
}

/* Set the howto pointer for an OR32 ELF reloc.  */

static void
or32_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
			arelent *cache_ptr,
			Elf_Internal_Rela *dst)
{
  unsigned int r_type;

  r_type = ELF32_R_TYPE (dst->r_info);
  BFD_ASSERT (r_type < (unsigned int) R_OR32_max);
  cache_ptr->howto = &elf_or32_howto_table[r_type];
}

#define TARGET_LITTLE_SYM	bfd_elf32_or32_little_vec
#define TARGET_LITTLE_NAME	"elf32-littleor32"
#define TARGET_BIG_SYM		bfd_elf32_or32_big_vec
#define TARGET_BIG_NAME		"elf32-or32"
#define ELF_ARCH		bfd_arch_or32
#define ELF_MACHINE_CODE	EM_OR32
#define ELF_MAXPAGESIZE		0x1000

#define elf_info_to_howto	0
#define elf_info_to_howto_rel	or32_info_to_howto_rel
#define elf_backend_object_p	or32_elf_object_p
#define elf_backend_final_write_processing \
				or32_elf_final_write_processing

#include "elf32-target.h"