OpenCores
URL https://opencores.org/ocsvn/open8_urisc/open8_urisc/trunk

Subversion Repositories open8_urisc

[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [bfd/] [elf32-lm32.c] - Blame information for rev 146

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 14 khays
/* Lattice Mico32-specific support for 32-bit ELF
2
   Copyright 2008, 2009, 2010  Free Software Foundation, Inc.
3
   Contributed by Jon Beniston <jon@beniston.com>
4
 
5
   This file is part of BFD, the Binary File Descriptor library.
6
 
7
   This program 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 3 of the License, or
10
   (at your option) any later version.
11
 
12
   This program 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 this program; if not, write to the Free Software
19
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20
   MA 02110-1301, USA.  */
21
 
22
#include "bfd.h"
23
#include "sysdep.h"
24
#include "libbfd.h"
25
#include "elf-bfd.h"
26
#include "elf/lm32.h"
27
 
28
#define DEFAULT_STACK_SIZE 0x20000
29
 
30
#define PLT_ENTRY_SIZE 20
31
 
32
#define PLT0_ENTRY_WORD0  0
33
#define PLT0_ENTRY_WORD1  0
34
#define PLT0_ENTRY_WORD2  0
35
#define PLT0_ENTRY_WORD3  0
36
#define PLT0_ENTRY_WORD4  0
37
 
38
#define PLT0_PIC_ENTRY_WORD0  0
39
#define PLT0_PIC_ENTRY_WORD1  0
40
#define PLT0_PIC_ENTRY_WORD2  0
41
#define PLT0_PIC_ENTRY_WORD3  0
42
#define PLT0_PIC_ENTRY_WORD4  0
43
 
44
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
45
 
46
extern const bfd_target bfd_elf32_lm32fdpic_vec;
47
 
48
#define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_lm32fdpic_vec)
49
 
50
static bfd_reloc_status_type lm32_elf_gprel_reloc
51
  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52
 
53
/* The linker needs to keep track of the number of relocs that it
54
   decides to copy as dynamic relocs in check_relocs for each symbol.
55
   This is so that it can later discard them if they are found to be
56
   unnecessary.  We store the information in a field extending the
57
   regular ELF linker hash table.  */
58
 
59
struct elf_lm32_dyn_relocs
60
{
61
  struct elf_lm32_dyn_relocs *next;
62
 
63
  /* The input section of the reloc.  */
64
  asection *sec;
65
 
66
  /* Total number of relocs copied for the input section.  */
67
  bfd_size_type count;
68
 
69
  /* Number of pc-relative relocs copied for the input section.  */
70
  bfd_size_type pc_count;
71
};
72
 
73
/* lm32 ELF linker hash entry.  */
74
 
75
struct elf_lm32_link_hash_entry
76
{
77
  struct elf_link_hash_entry root;
78
 
79
  /* Track dynamic relocs copied for this symbol.  */
80
  struct elf_lm32_dyn_relocs *dyn_relocs;
81
};
82
 
83
/* lm32 ELF linker hash table.  */
84
 
85
struct elf_lm32_link_hash_table
86
{
87
  struct elf_link_hash_table root;
88
 
89
  /* Short-cuts to get to dynamic linker sections.  */
90
  asection *sgot;
91
  asection *sgotplt;
92
  asection *srelgot;
93
  asection *sfixup32;
94
  asection *splt;
95
  asection *srelplt;
96
  asection *sdynbss;
97
  asection *srelbss;
98
 
99
  int relocs32;
100
};
101
 
102
/* Get the lm32 ELF linker hash table from a link_info structure.  */
103
 
104
#define lm32_elf_hash_table(p) \
105
  (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
106
  == LM32_ELF_DATA ? ((struct elf_lm32_link_hash_table *) ((p)->hash)) : NULL)
107
 
108
#define lm32fdpic_got_section(info) \
109
  (lm32_elf_hash_table (info)->sgot)
110
#define lm32fdpic_gotrel_section(info) \
111
  (lm32_elf_hash_table (info)->srelgot)
112
#define lm32fdpic_fixup32_section(info) \
113
  (lm32_elf_hash_table (info)->sfixup32)
114
 
115
struct weak_symbol_list
116
{
117
  const char *name;
118
  struct weak_symbol_list *next;
119
};
120
 
121
/* Create an entry in an lm32 ELF linker hash table.  */
122
 
123
static struct bfd_hash_entry *
124
lm32_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
125
                            struct bfd_hash_table *table,
126
                            const char *string)
127
{
128
  struct elf_lm32_link_hash_entry *ret =
129
    (struct elf_lm32_link_hash_entry *) entry;
130
 
131
  /* Allocate the structure if it has not already been allocated by a
132
     subclass.  */
133
  if (ret == NULL)
134
    ret = bfd_hash_allocate (table,
135
                             sizeof (struct elf_lm32_link_hash_entry));
136
  if (ret == NULL)
137
    return NULL;
138
 
139
  /* Call the allocation method of the superclass.  */
140
  ret = ((struct elf_lm32_link_hash_entry *)
141
         _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
142
                                     table, string));
143
  if (ret != NULL)
144
    {
145
      struct elf_lm32_link_hash_entry *eh;
146
 
147
      eh = (struct elf_lm32_link_hash_entry *) ret;
148
      eh->dyn_relocs = NULL;
149
    }
150
 
151
  return (struct bfd_hash_entry *) ret;
152
}
153
 
154
/* Create an lm32 ELF linker hash table.  */
155
 
156
static struct bfd_link_hash_table *
157
lm32_elf_link_hash_table_create (bfd *abfd)
158
{
159
  struct elf_lm32_link_hash_table *ret;
160
  bfd_size_type amt = sizeof (struct elf_lm32_link_hash_table);
161
 
162
  ret = bfd_malloc (amt);
163
  if (ret == NULL)
164
    return NULL;
165
 
166
  if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
167
                                      lm32_elf_link_hash_newfunc,
168
                                      sizeof (struct elf_lm32_link_hash_entry),
169
                                      LM32_ELF_DATA))
170
    {
171
      free (ret);
172
      return NULL;
173
    }
174
 
175
  ret->sgot = NULL;
176
  ret->sgotplt = NULL;
177
  ret->srelgot = NULL;
178
  ret->sfixup32 = NULL;
179
  ret->splt = NULL;
180
  ret->srelplt = NULL;
181
  ret->sdynbss = NULL;
182
  ret->srelbss = NULL;
183
  ret->relocs32 = 0;
184
 
185
  return &ret->root.root;
186
}
187
 
188
/* Add a fixup to the ROFIXUP section.  */
189
 
190
static bfd_vma
191
_lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation)
192
{
193
  bfd_vma fixup_offset;
194
 
195
  if (rofixup->flags & SEC_EXCLUDE)
196
    return -1;
197
 
198
  fixup_offset = rofixup->reloc_count * 4;
199
  if (rofixup->contents)
200
    {
201
      BFD_ASSERT (fixup_offset < rofixup->size);
202
      if (fixup_offset < rofixup->size)
203
      bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset);
204
    }
205
  rofixup->reloc_count++;
206
 
207
  return fixup_offset;
208
}
209
 
210
/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
211
   shortcuts to them in our hash table.  */
212
 
213
static bfd_boolean
214
create_got_section (bfd *dynobj, struct bfd_link_info *info)
215
{
216
  struct elf_lm32_link_hash_table *htab;
217
  asection *s;
218
 
219
  /* This function may be called more than once.  */
220
  s = bfd_get_section_by_name (dynobj, ".got");
221
  if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
222
    return TRUE;
223
 
224
  htab = lm32_elf_hash_table (info);
225
  if (htab == NULL)
226
    return FALSE;
227
 
228
  if (! _bfd_elf_create_got_section (dynobj, info))
229
    return FALSE;
230
 
231
  htab->sgot = bfd_get_section_by_name (dynobj, ".got");
232
  htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
233
  htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
234
  if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot)
235
    abort ();
236
 
237
  return TRUE;
238
}
239
 
240
/* Create .rofixup sections in DYNOBJ, and set up
241
   shortcuts to them in our hash table.  */
242
 
243
static bfd_boolean
244
create_rofixup_section (bfd *dynobj, struct bfd_link_info *info)
245
{
246
  struct elf_lm32_link_hash_table *htab;
247
  htab = lm32_elf_hash_table (info);
248
 
249
  if (htab == NULL)
250
    return FALSE;
251
 
252
  /* Fixup section for R_LM32_32 relocs.  */
253
  lm32fdpic_fixup32_section (info) = bfd_make_section_with_flags (dynobj,
254
                                                                   ".rofixup",
255
                                                                   (SEC_ALLOC
256
                                                                   | SEC_LOAD
257
                                                                   | SEC_HAS_CONTENTS
258
                                                                   | SEC_IN_MEMORY
259
                                                                   | SEC_LINKER_CREATED
260
                                                                   | SEC_READONLY));
261
  if (lm32fdpic_fixup32_section (info) == NULL
262
      || ! bfd_set_section_alignment (dynobj, lm32fdpic_fixup32_section (info), 2))
263
    return FALSE;
264
 
265
  return TRUE;
266
}
267
 
268
static reloc_howto_type lm32_elf_howto_table [] =
269
{
270
  /* This reloc does nothing.  */
271
  HOWTO (R_LM32_NONE,               /* type */
272
         0,                         /* rightshift */
273
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
274
         32,                        /* bitsize */
275
         FALSE,                     /* pc_relative */
276
         0,                         /* bitpos */
277
         complain_overflow_bitfield,/* complain_on_overflow */
278
         bfd_elf_generic_reloc,     /* special_function */
279
         "R_LM32_NONE",             /* name */
280
         FALSE,                     /* partial_inplace */
281
         0,                         /* src_mask */
282
         0,                         /* dst_mask */
283
         FALSE),                    /* pcrel_offset */
284
 
285
  /* An 8 bit absolute relocation.  */
286
  HOWTO (R_LM32_8,                  /* type */
287
         0,                         /* rightshift */
288
         0,                         /* size (0 = byte, 1 = short, 2 = long) */
289
         8,                         /* bitsize */
290
         FALSE,                     /* pc_relative */
291
         0,                         /* bitpos */
292
         complain_overflow_bitfield,/* complain_on_overflow */
293
         bfd_elf_generic_reloc,     /* special_function */
294
         "R_LM32_8",                /* name */
295
         FALSE,                     /* partial_inplace */
296
         0,                         /* src_mask */
297
         0xff,                      /* dst_mask */
298
         FALSE),                    /* pcrel_offset */
299
 
300
  /* A 16 bit absolute relocation.  */
301
  HOWTO (R_LM32_16,                 /* type */
302
         0,                         /* rightshift */
303
         1,                         /* size (0 = byte, 1 = short, 2 = long) */
304
         16,                        /* bitsize */
305
         FALSE,                     /* pc_relative */
306
         0,                         /* bitpos */
307
         complain_overflow_bitfield,/* complain_on_overflow */
308
         bfd_elf_generic_reloc,     /* special_function */
309
         "R_LM32_16",               /* name */
310
         FALSE,                     /* partial_inplace */
311
         0,                         /* src_mask */
312
         0xffff,                    /* dst_mask */
313
         FALSE),                    /* pcrel_offset */
314
 
315
  /* A 32 bit absolute relocation.  */
316
  HOWTO (R_LM32_32,                 /* type */
317
         0,                         /* rightshift */
318
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
319
         32,                        /* bitsize */
320
         FALSE,                     /* pc_relative */
321
         0,                         /* bitpos */
322
         complain_overflow_bitfield,/* complain_on_overflow */
323
         bfd_elf_generic_reloc,     /* special_function */
324
         "R_LM32_32",               /* name */
325
         FALSE,                     /* partial_inplace */
326
         0,                         /* src_mask */
327
         0xffffffff,                /* dst_mask */
328
         FALSE),                    /* pcrel_offset */
329
 
330
  HOWTO (R_LM32_HI16,               /* type */
331
         16,                        /* rightshift */
332
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
333
         16,                        /* bitsize */
334
         FALSE,                     /* pc_relative */
335
         0,                         /* bitpos */
336
         complain_overflow_bitfield,/* complain_on_overflow */
337
         bfd_elf_generic_reloc,     /* special_function */
338
         "R_LM32_HI16",             /* name */
339
         FALSE,                     /* partial_inplace */
340
         0,                         /* src_mask */
341
         0xffff,                    /* dst_mask */
342
         FALSE),                    /* pcrel_offset */
343
 
344
  HOWTO (R_LM32_LO16,               /* type */
345
         0,                         /* rightshift */
346
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
347
         16,                        /* bitsize */
348
         FALSE,                     /* pc_relative */
349
         0,                         /* bitpos */
350
         complain_overflow_dont,    /* complain_on_overflow */
351
         bfd_elf_generic_reloc,     /* special_function */
352
         "R_LM32_LO16",             /* name */
353
         FALSE,                     /* partial_inplace */
354
         0,                         /* src_mask */
355
         0xffff,                    /* dst_mask */
356
         FALSE),                    /* pcrel_offset */
357
 
358
  HOWTO (R_LM32_GPREL16,            /* type */
359
         0,                         /* rightshift */
360
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
361
         16,                        /* bitsize */
362
         FALSE,                     /* pc_relative */
363
         0,                         /* bitpos */
364
         complain_overflow_dont,    /* complain_on_overflow */
365
         lm32_elf_gprel_reloc,      /* special_function */
366
         "R_LM32_GPREL16",          /* name */
367
         FALSE,                     /* partial_inplace */
368
         0,                         /* src_mask */
369
         0xffff,                    /* dst_mask */
370
         FALSE),                    /* pcrel_offset */
371
 
372
  HOWTO (R_LM32_CALL,               /* type */
373
         2,                         /* rightshift */
374
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
375
         26,                        /* bitsize */
376
         TRUE,                      /* pc_relative */
377
         0,                         /* bitpos */
378
         complain_overflow_signed,  /* complain_on_overflow */
379
         bfd_elf_generic_reloc,     /* special_function */
380
         "R_LM32_CALL",             /* name */
381
         FALSE,                     /* partial_inplace */
382
         0,                         /* src_mask */
383
         0x3ffffff,                 /* dst_mask */
384
         TRUE),                     /* pcrel_offset */
385
 
386
  HOWTO (R_LM32_BRANCH,             /* type */
387
         2,                         /* rightshift */
388
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
389
         16,                        /* bitsize */
390
         TRUE,                      /* pc_relative */
391
         0,                         /* bitpos */
392
         complain_overflow_signed,  /* complain_on_overflow */
393
         bfd_elf_generic_reloc,     /* special_function */
394
         "R_LM32_BRANCH",           /* name */
395
         FALSE,                     /* partial_inplace */
396
         0,                         /* src_mask */
397
         0xffff,                    /* dst_mask */
398
         TRUE),                     /* pcrel_offset */
399
 
400
  /* GNU extension to record C++ vtable hierarchy.  */
401
  HOWTO (R_LM32_GNU_VTINHERIT,      /* type */
402
         0,                         /* rightshift */
403
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
404
         0,                         /* bitsize */
405
         FALSE,                     /* pc_relative */
406
         0,                         /* bitpos */
407
         complain_overflow_dont,    /* complain_on_overflow */
408
         NULL,                      /* special_function */
409
         "R_LM32_GNU_VTINHERIT",    /* name */
410
         FALSE,                     /* partial_inplace */
411
         0,                         /* src_mask */
412
         0,                         /* dst_mask */
413
         FALSE),                    /* pcrel_offset */
414
 
415
  /* GNU extension to record C++ vtable member usage.  */
416
  HOWTO (R_LM32_GNU_VTENTRY,        /* type */
417
         0,                         /* rightshift */
418
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
419
         0,                         /* bitsize */
420
         FALSE,                     /* pc_relative */
421
         0,                         /* bitpos */
422
         complain_overflow_dont,    /* complain_on_overflow */
423
         _bfd_elf_rel_vtable_reloc_fn,/* special_function */
424
         "R_LM32_GNU_VTENTRY",      /* name */
425
         FALSE,                     /* partial_inplace */
426
         0,                         /* src_mask */
427
         0,                         /* dst_mask */
428
         FALSE),                    /* pcrel_offset */
429
 
430
  HOWTO (R_LM32_16_GOT,             /* type */
431
         0,                         /* rightshift */
432
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
433
         16,                        /* bitsize */
434
         FALSE,                     /* pc_relative */
435
         0,                         /* bitpos */
436
         complain_overflow_signed,  /* complain_on_overflow */
437
         bfd_elf_generic_reloc,     /* special_function */
438
         "R_LM32_16_GOT",           /* name */
439
         FALSE,                     /* partial_inplace */
440
         0,                         /* src_mask */
441
         0xffff,                    /* dst_mask */
442
         FALSE),                    /* pcrel_offset */
443
 
444
  HOWTO (R_LM32_GOTOFF_HI16,        /* type */
445
         16,                        /* rightshift */
446
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
447
         16,                        /* bitsize */
448
         FALSE,                     /* pc_relative */
449
         0,                         /* bitpos */
450
         complain_overflow_dont,    /* complain_on_overflow */
451
         bfd_elf_generic_reloc,     /* special_function */
452
         "R_LM32_GOTOFF_HI16",      /* name */
453
         FALSE,                     /* partial_inplace */
454
         0xffff,                    /* src_mask */
455
         0xffff,                    /* dst_mask */
456
         FALSE),                    /* pcrel_offset */
457
 
458
  HOWTO (R_LM32_GOTOFF_LO16,        /* type */
459
         0,                         /* rightshift */
460
         2,                         /* size (0 = byte, 1 = short, 2 = long) */
461
         16,                        /* bitsize */
462
         FALSE,                     /* pc_relative */
463
         0,                         /* bitpos */
464
         complain_overflow_dont,    /* complain_on_overflow */
465
         bfd_elf_generic_reloc,     /* special_function */
466
         "R_LM32_GOTOFF_LO16",      /* name */
467
         FALSE,                     /* partial_inplace */
468
         0xffff,                    /* src_mask */
469
         0xffff,                    /* dst_mask */
470
         FALSE),                    /* pcrel_offset */
471
 
472
  HOWTO (R_LM32_COPY,           /* type */
473
         0,                      /* rightshift */
474
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
475
         32,                    /* bitsize */
476
         FALSE,                 /* pc_relative */
477
         0,                      /* bitpos */
478
         complain_overflow_bitfield, /* complain_on_overflow */
479
         bfd_elf_generic_reloc, /* special_function */
480
         "R_LM32_COPY",         /* name */
481
         FALSE,                 /* partial_inplace */
482
         0xffffffff,            /* src_mask */
483
         0xffffffff,            /* dst_mask */
484
         FALSE),                /* pcrel_offset */
485
 
486
  HOWTO (R_LM32_GLOB_DAT,       /* type */
487
         0,                      /* rightshift */
488
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
489
         32,                    /* bitsize */
490
         FALSE,                 /* pc_relative */
491
         0,                      /* bitpos */
492
         complain_overflow_bitfield, /* complain_on_overflow */
493
         bfd_elf_generic_reloc, /* special_function */
494
         "R_LM32_GLOB_DAT",     /* name */
495
         FALSE,                 /* partial_inplace */
496
         0xffffffff,            /* src_mask */
497
         0xffffffff,            /* dst_mask */
498
         FALSE),                /* pcrel_offset */
499
 
500
  HOWTO (R_LM32_JMP_SLOT,       /* type */
501
         0,                      /* rightshift */
502
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
503
         32,                    /* bitsize */
504
         FALSE,                 /* pc_relative */
505
         0,                      /* bitpos */
506
         complain_overflow_bitfield, /* complain_on_overflow */
507
         bfd_elf_generic_reloc, /* special_function */
508
         "R_LM32_JMP_SLOT",     /* name */
509
         FALSE,                 /* partial_inplace */
510
         0xffffffff,            /* src_mask */
511
         0xffffffff,            /* dst_mask */
512
         FALSE),                /* pcrel_offset */
513
 
514
  HOWTO (R_LM32_RELATIVE,       /* type */
515
         0,                      /* rightshift */
516
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
517
         32,                    /* bitsize */
518
         FALSE,                 /* pc_relative */
519
         0,                      /* bitpos */
520
         complain_overflow_bitfield, /* complain_on_overflow */
521
         bfd_elf_generic_reloc, /* special_function */
522
         "R_LM32_RELATIVE",     /* name */
523
         FALSE,                 /* partial_inplace */
524
         0xffffffff,            /* src_mask */
525
         0xffffffff,            /* dst_mask */
526
         FALSE),                /* pcrel_offset */
527
 
528
};
529
 
530
/* Map BFD reloc types to lm32 ELF reloc types. */
531
 
532
struct lm32_reloc_map
533
{
534
    bfd_reloc_code_real_type bfd_reloc_val;
535
    unsigned char elf_reloc_val;
536
};
537
 
538
static const struct lm32_reloc_map lm32_reloc_map[] =
539
{
540
  { BFD_RELOC_NONE,             R_LM32_NONE },
541
  { BFD_RELOC_8,                R_LM32_8 },
542
  { BFD_RELOC_16,               R_LM32_16 },
543
  { BFD_RELOC_32,               R_LM32_32 },
544
  { BFD_RELOC_HI16,             R_LM32_HI16 },
545
  { BFD_RELOC_LO16,             R_LM32_LO16 },
546
  { BFD_RELOC_GPREL16,          R_LM32_GPREL16 },
547
  { BFD_RELOC_LM32_CALL,        R_LM32_CALL },
548
  { BFD_RELOC_LM32_BRANCH,      R_LM32_BRANCH },
549
  { BFD_RELOC_VTABLE_INHERIT,   R_LM32_GNU_VTINHERIT },
550
  { BFD_RELOC_VTABLE_ENTRY,     R_LM32_GNU_VTENTRY },
551
  { BFD_RELOC_LM32_16_GOT,      R_LM32_16_GOT },
552
  { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 },
553
  { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 },
554
  { BFD_RELOC_LM32_COPY,        R_LM32_COPY },
555
  { BFD_RELOC_LM32_GLOB_DAT,    R_LM32_GLOB_DAT },
556
  { BFD_RELOC_LM32_JMP_SLOT,    R_LM32_JMP_SLOT },
557
  { BFD_RELOC_LM32_RELATIVE,    R_LM32_RELATIVE },
558
};
559
 
560
static reloc_howto_type *
561
lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
562
                        bfd_reloc_code_real_type code)
563
{
564
  unsigned int i;
565
 
566
  for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++)
567
    if (lm32_reloc_map[i].bfd_reloc_val == code)
568
      return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val];
569
  return NULL;
570
}
571
 
572
static reloc_howto_type *
573
lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
574
                        const char *r_name)
575
{
576
  unsigned int i;
577
 
578
  for (i = 0;
579
       i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]);
580
       i++)
581
    if (lm32_elf_howto_table[i].name != NULL
582
        && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0)
583
      return &lm32_elf_howto_table[i];
584
 
585
  return NULL;
586
}
587
 
588
 
589
/* Set the howto pointer for an Lattice Mico32 ELF reloc.  */
590
 
591
static void
592
lm32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
593
                         arelent *cache_ptr,
594
                         Elf_Internal_Rela *dst)
595
{
596
  unsigned int r_type;
597
 
598
  r_type = ELF32_R_TYPE (dst->r_info);
599
  BFD_ASSERT (r_type < (unsigned int) R_LM32_max);
600
  cache_ptr->howto = &lm32_elf_howto_table[r_type];
601
}
602
 
603
/* Set the right machine number for an Lattice Mico32 ELF file. */
604
 
605
static bfd_boolean
606
lm32_elf_object_p (bfd *abfd)
607
{
608
  return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32);
609
}
610
 
611
/* Set machine type flags just before file is written out. */
612
 
613
static void
614
lm32_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
615
{
616
  elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32;
617
  elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH;
618
  switch (bfd_get_mach (abfd))
619
    {
620
      case bfd_mach_lm32:
621
        elf_elfheader (abfd)->e_flags |= E_LM32_MACH;
622
        break;
623
      default:
624
        abort ();
625
    }
626
}
627
 
628
/* Set the GP value for OUTPUT_BFD.  Returns FALSE if this is a
629
   dangerous relocation.  */
630
 
631
static bfd_boolean
632
lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
633
{
634
  unsigned int count;
635
  asymbol **sym;
636
  unsigned int i;
637
 
638
  /* If we've already figured out what GP will be, just return it. */
639
  *pgp = _bfd_get_gp_value (output_bfd);
640
  if (*pgp)
641
    return TRUE;
642
 
643
  count = bfd_get_symcount (output_bfd);
644
  sym = bfd_get_outsymbols (output_bfd);
645
 
646
  /* The linker script will have created a symbol named `_gp' with the
647
     appropriate value.  */
648
  if (sym == NULL)
649
    i = count;
650
  else
651
    {
652
      for (i = 0; i < count; i++, sym++)
653
        {
654
          const char *name;
655
 
656
          name = bfd_asymbol_name (*sym);
657
          if (*name == '_' && strcmp (name, "_gp") == 0)
658
            {
659
              *pgp = bfd_asymbol_value (*sym);
660
              _bfd_set_gp_value (output_bfd, *pgp);
661
              break;
662
            }
663
        }
664
    }
665
 
666
  if (i >= count)
667
    {
668
      /* Only get the error once.  */
669
      *pgp = 4;
670
      _bfd_set_gp_value (output_bfd, *pgp);
671
      return FALSE;
672
    }
673
 
674
  return TRUE;
675
}
676
 
677
/* We have to figure out the gp value, so that we can adjust the
678
   symbol value correctly.  We look up the symbol _gp in the output
679
   BFD.  If we can't find it, we're stuck.  We cache it in the ELF
680
   target data.  We don't need to adjust the symbol value for an
681
   external symbol if we are producing relocatable output.  */
682
 
683
static bfd_reloc_status_type
684
lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
685
                    char **error_message, bfd_vma *pgp)
686
{
687
  if (bfd_is_und_section (symbol->section) && !relocatable)
688
    {
689
      *pgp = 0;
690
      return bfd_reloc_undefined;
691
    }
692
 
693
  *pgp = _bfd_get_gp_value (output_bfd);
694
  if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0))
695
    {
696
      if (relocatable)
697
        {
698
          /* Make up a value.  */
699
          *pgp = symbol->section->output_section->vma + 0x4000;
700
          _bfd_set_gp_value (output_bfd, *pgp);
701
        }
702
      else if (!lm32_elf_assign_gp (output_bfd, pgp))
703
        {
704
          *error_message =
705
            (char *)
706
            _("global pointer relative relocation when _gp not defined");
707
          return bfd_reloc_dangerous;
708
        }
709
    }
710
 
711
  return bfd_reloc_ok;
712
}
713
 
714
static bfd_reloc_status_type
715
lm32_elf_do_gprel_relocate (bfd *abfd,
716
                            reloc_howto_type *howto,
717
                            asection *input_section ATTRIBUTE_UNUSED,
718
                            bfd_byte *data,
719
                            bfd_vma offset,
720
                            bfd_vma symbol_value,
721
                            bfd_vma addend)
722
{
723
  return _bfd_final_link_relocate (howto, abfd, input_section,
724
                                   data, offset, symbol_value, addend);
725
}
726
 
727
static bfd_reloc_status_type
728
lm32_elf_gprel_reloc (bfd *abfd,
729
                      arelent *reloc_entry,
730
                      asymbol *symbol,
731
                      void *data,
732
                      asection *input_section,
733
                      bfd *output_bfd,
734
                      char **msg)
735
{
736
  bfd_vma relocation;
737
  bfd_vma gp;
738
  bfd_reloc_status_type r;
739
 
740
  if (output_bfd != (bfd *) NULL
741
      && (symbol->flags & BSF_SECTION_SYM) == 0
742
      && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
743
    {
744
      reloc_entry->address += input_section->output_offset;
745
      return bfd_reloc_ok;
746
    }
747
 
748
  if (output_bfd != NULL)
749
    return bfd_reloc_ok;
750
 
751
  relocation = symbol->value
752
    + symbol->section->output_section->vma + symbol->section->output_offset;
753
 
754
  if ((r =
755
       lm32_elf_final_gp (abfd, symbol, FALSE, msg, &gp)) == bfd_reloc_ok)
756
    {
757
      relocation = relocation + reloc_entry->addend - gp;
758
      reloc_entry->addend = 0;
759
      if ((signed) relocation < -32768 || (signed) relocation > 32767)
760
        {
761
          *msg = _("global pointer relative address out of range");
762
          r = bfd_reloc_outofrange;
763
        }
764
      else
765
        {
766
          r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto,
767
                                             input_section,
768
                                             data, reloc_entry->address,
769
                                             relocation, reloc_entry->addend);
770
        }
771
    }
772
 
773
  return r;
774
}
775
 
776
/* Find the segment number in which OSEC, and output section, is
777
   located.  */
778
 
779
static unsigned
780
_lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec)
781
{
782
  struct elf_segment_map *m;
783
  Elf_Internal_Phdr *p;
784
 
785
  /* Find the segment that contains the output_section.  */
786
  for (m = elf_tdata (output_bfd)->segment_map,
787
         p = elf_tdata (output_bfd)->phdr;
788
       m != NULL;
789
       m = m->next, p++)
790
    {
791
      int i;
792
 
793
      for (i = m->count - 1; i >= 0; i--)
794
        if (m->sections[i] == osec)
795
          break;
796
 
797
      if (i >= 0)
798
        break;
799
    }
800
 
801
  return p - elf_tdata (output_bfd)->phdr;
802
}
803
 
804
/* Determine if an output section is read-only.  */
805
 
806
inline static bfd_boolean
807
_lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
808
{
809
  unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec);
810
 
811
  return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
812
}
813
 
814
/* Relocate a section */
815
 
816
static bfd_boolean
817
lm32_elf_relocate_section (bfd *output_bfd,
818
                           struct bfd_link_info *info,
819
                           bfd *input_bfd,
820
                           asection *input_section,
821
                           bfd_byte *contents,
822
                           Elf_Internal_Rela *relocs,
823
                           Elf_Internal_Sym *local_syms,
824
                           asection **local_sections)
825
{
826
  Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
827
  struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
828
  Elf_Internal_Rela *rel, *relend;
829
  struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info);
830
  bfd *dynobj;
831
  bfd_vma *local_got_offsets;
832
  asection *sgot;
833
 
834
  if (htab == NULL)
835
    return FALSE;
836
 
837
  dynobj = htab->root.dynobj;
838
  local_got_offsets = elf_local_got_offsets (input_bfd);
839
 
840
  sgot = htab->sgot;
841
 
842
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
843
  sym_hashes = elf_sym_hashes (input_bfd);
844
 
845
  rel = relocs;
846
  relend = relocs + input_section->reloc_count;
847
  for (; rel < relend; rel++)
848
    {
849
      reloc_howto_type *howto;
850
      unsigned int r_type;
851
      unsigned long r_symndx;
852
      Elf_Internal_Sym *sym;
853
      asection *sec;
854
      struct elf_link_hash_entry *h;
855
      bfd_vma relocation;
856
      bfd_vma gp;
857
      bfd_reloc_status_type r;
858
      const char *name = NULL;
859
 
860
      r_symndx = ELF32_R_SYM (rel->r_info);
861
      r_type = ELF32_R_TYPE (rel->r_info);
862
 
863
      if (r_type == R_LM32_GNU_VTENTRY
864
          || r_type == R_LM32_GNU_VTINHERIT )
865
        continue;
866
 
867
      h = NULL;
868
      sym = NULL;
869
      sec = NULL;
870
 
871
      howto = lm32_elf_howto_table + r_type;
872
 
873
      if (r_symndx < symtab_hdr->sh_info)
874
        {
875
          /* It's a local symbol.  */
876
          sym = local_syms + r_symndx;
877
          sec = local_sections[r_symndx];
878
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
879
          name = bfd_elf_string_from_elf_section
880
            (input_bfd, symtab_hdr->sh_link, sym->st_name);
881
          name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
882
        }
883
      else
884
        {
885
          /* It's a global symbol.  */
886
          bfd_boolean unresolved_reloc;
887
          bfd_boolean warned;
888
 
889
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
890
                                   r_symndx, symtab_hdr, sym_hashes,
891
                                   h, sec, relocation,
892
                                   unresolved_reloc, warned);
893
          name = h->root.root.string;
894
        }
895
 
896
      if (sec != NULL && elf_discarded_section (sec))
897
        RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
898
                                         rel, relend, howto, contents);
899
 
900
      if (info->relocatable)
901
        {
902
          /* This is a relocatable link.  We don't have to change
903
             anything, unless the reloc is against a section symbol,
904
             in which case we have to adjust according to where the
905
             section symbol winds up in the output section.  */
906
          if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION)
907
            continue;
908
 
909
          /* If partial_inplace, we need to store any additional addend
910
             back in the section.  */
911
          if (! howto->partial_inplace)
912
            continue;
913
 
914
          /* Shouldn't reach here.  */
915
          abort ();
916
          r = bfd_reloc_ok;
917
        }
918
      else
919
        {
920
          switch (howto->type)
921
            {
922
            case R_LM32_GPREL16:
923
              if (!lm32_elf_assign_gp (output_bfd, &gp))
924
                r = bfd_reloc_dangerous;
925
              else
926
                {
927
                  relocation = relocation + rel->r_addend - gp;
928
                  rel->r_addend = 0;
929
                  if ((signed)relocation < -32768 || (signed)relocation > 32767)
930
                    r = bfd_reloc_outofrange;
931
                  else
932
                    {
933
                      r = _bfd_final_link_relocate (howto, input_bfd,
934
                                                  input_section, contents,
935
                                          rel->r_offset, relocation,
936
                                          rel->r_addend);
937
                   }
938
                }
939
              break;
940
            case R_LM32_16_GOT:
941
              /* Relocation is to the entry for this symbol in the global
942
                 offset table.  */
943
              BFD_ASSERT (sgot != NULL);
944
              if (h != NULL)
945
                {
946
                  bfd_boolean dyn;
947
                  bfd_vma off;
948
 
949
                  off = h->got.offset;
950
                  BFD_ASSERT (off != (bfd_vma) -1);
951
 
952
                  dyn = htab->root.dynamic_sections_created;
953
                  if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
954
                      || (info->shared
955
                          && (info->symbolic
956
                              || h->dynindx == -1
957
                              || h->forced_local)
958
                          && h->def_regular))
959
                    {
960
                      /* This is actually a static link, or it is a
961
                         -Bsymbolic link and the symbol is defined
962
                         locally, or the symbol was forced to be local
963
                         because of a version file.  We must initialize
964
                         this entry in the global offset table.  Since the
965
                         offset must always be a multiple of 4, we use the
966
                         least significant bit to record whether we have
967
                         initialized it already.
968
 
969
                         When doing a dynamic link, we create a .rela.got
970
                         relocation entry to initialize the value.  This
971
                         is done in the finish_dynamic_symbol routine.  */
972
                      if ((off & 1) != 0)
973
                        off &= ~1;
974
                      else
975
                        {
976
                          /* Write entry in GOT */
977
                          bfd_put_32 (output_bfd, relocation,
978
                                      sgot->contents + off);
979
                          /* Create entry in .rofixup pointing to GOT entry.  */
980
                           if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak)
981
                             {
982
                               _lm32fdpic_add_rofixup (output_bfd,
983
                                                       lm32fdpic_fixup32_section
984
                                                        (info),
985
                                                       sgot->output_section->vma
986
                                                        + sgot->output_offset
987
                                                        + off);
988
                             }
989
                          /* Mark GOT entry as having been written.  */
990
                          h->got.offset |= 1;
991
                        }
992
                    }
993
 
994
                  relocation = sgot->output_offset + off;
995
                }
996
              else
997
                {
998
                  bfd_vma off;
999
                  bfd_byte *loc;
1000
 
1001
                  BFD_ASSERT (local_got_offsets != NULL
1002
                              && local_got_offsets[r_symndx] != (bfd_vma) -1);
1003
 
1004
                  /* Get offset into GOT table.  */
1005
                  off = local_got_offsets[r_symndx];
1006
 
1007
                  /* The offset must always be a multiple of 4.  We use
1008
                     the least significant bit to record whether we have
1009
                     already processed this entry.  */
1010
                  if ((off & 1) != 0)
1011
                    off &= ~1;
1012
                  else
1013
                    {
1014
                      /* Write entry in GOT.  */
1015
                      bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1016
                      /* Create entry in .rofixup pointing to GOT entry.  */
1017
                      if (IS_FDPIC (output_bfd))
1018
                        {
1019
                          _lm32fdpic_add_rofixup (output_bfd,
1020
                                                  lm32fdpic_fixup32_section
1021
                                                   (info),
1022
                                                  sgot->output_section->vma
1023
                                                   + sgot->output_offset
1024
                                                   + off);
1025
                        }
1026
 
1027
                      if (info->shared)
1028
                        {
1029
                          asection *srelgot;
1030
                          Elf_Internal_Rela outrel;
1031
 
1032
                          /* We need to generate a R_LM32_RELATIVE reloc
1033
                             for the dynamic linker.  */
1034
                          srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1035
                          BFD_ASSERT (srelgot != NULL);
1036
 
1037
                          outrel.r_offset = (sgot->output_section->vma
1038
                                             + sgot->output_offset
1039
                                             + off);
1040
                          outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
1041
                          outrel.r_addend = relocation;
1042
                          loc = srelgot->contents;
1043
                          loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
1044
                          bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1045
                          ++srelgot->reloc_count;
1046
                        }
1047
 
1048
                      local_got_offsets[r_symndx] |= 1;
1049
                    }
1050
 
1051
 
1052
                  relocation = sgot->output_offset + off;
1053
                }
1054
 
1055
              /* Addend should be zero.  */
1056
              if (rel->r_addend != 0)
1057
                (*_bfd_error_handler) (_("internal error: addend should be zero for R_LM32_16_GOT"));
1058
 
1059
              r = _bfd_final_link_relocate (howto,
1060
                                            input_bfd,
1061
                                            input_section,
1062
                                            contents,
1063
                                            rel->r_offset,
1064
                                            relocation,
1065
                                            rel->r_addend);
1066
              break;
1067
 
1068
            case R_LM32_GOTOFF_LO16:
1069
            case R_LM32_GOTOFF_HI16:
1070
              /* Relocation is offset from GOT.  */
1071
              BFD_ASSERT (sgot != NULL);
1072
              relocation -= sgot->output_section->vma;
1073
              /* Account for sign-extension.  */
1074
              if ((r_type == R_LM32_GOTOFF_HI16)
1075
                  && ((relocation + rel->r_addend) & 0x8000))
1076
                rel->r_addend += 0x10000;
1077
              r = _bfd_final_link_relocate (howto,
1078
                                            input_bfd,
1079
                                            input_section,
1080
                                            contents,
1081
                                            rel->r_offset,
1082
                                            relocation,
1083
                                            rel->r_addend);
1084
              break;
1085
 
1086
            case R_LM32_32:
1087
              if (IS_FDPIC (output_bfd))
1088
                {
1089
                  if ((!h) || (h && h->root.type != bfd_link_hash_undefweak))
1090
                    {
1091
                      /* Only create .rofixup entries for relocs in loadable sections.  */
1092
                      if ((bfd_get_section_flags (output_bfd, input_section->output_section)
1093
                          & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
1094
 
1095
                        {
1096
                          /* Check address to be modified is writable.  */
1097
                          if (_lm32fdpic_osec_readonly_p (output_bfd,
1098
                                                          input_section
1099
                                                           ->output_section))
1100
                            {
1101
                              info->callbacks->warning
1102
                                (info,
1103
                                 _("cannot emit dynamic relocations in read-only section"),
1104
                                 name, input_bfd, input_section, rel->r_offset);
1105
                               return FALSE;
1106
                            }
1107
                          /* Create entry in .rofixup section.  */
1108
                          _lm32fdpic_add_rofixup (output_bfd,
1109
                                                  lm32fdpic_fixup32_section (info),
1110
                                                  input_section->output_section->vma
1111
                                                   + input_section->output_offset
1112
                                                   + rel->r_offset);
1113
                        }
1114
                    }
1115
                }
1116
              /* Fall through.  */
1117
 
1118
            default:
1119
              r = _bfd_final_link_relocate (howto,
1120
                                            input_bfd,
1121
                                            input_section,
1122
                                            contents,
1123
                                            rel->r_offset,
1124
                                            relocation,
1125
                                            rel->r_addend);
1126
              break;
1127
            }
1128
        }
1129
 
1130
      if (r != bfd_reloc_ok)
1131
        {
1132
          const char *msg = NULL;
1133
          arelent bfd_reloc;
1134
 
1135
          lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel);
1136
          howto = bfd_reloc.howto;
1137
 
1138
          if (h != NULL)
1139
            name = h->root.root.string;
1140
          else
1141
            {
1142
              name = (bfd_elf_string_from_elf_section
1143
                      (input_bfd, symtab_hdr->sh_link, sym->st_name));
1144
              if (name == NULL || *name == '\0')
1145
                name = bfd_section_name (input_bfd, sec);
1146
            }
1147
 
1148
          switch (r)
1149
            {
1150
            case bfd_reloc_overflow:
1151
              if ((h != NULL)
1152
                 && (h->root.type == bfd_link_hash_undefweak))
1153
                break;
1154
              if (! ((*info->callbacks->reloc_overflow)
1155
                     (info, (h ? &h->root : NULL), name, howto->name,
1156
                      (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
1157
                return FALSE;
1158
              break;
1159
 
1160
            case bfd_reloc_undefined:
1161
              if (! ((*info->callbacks->undefined_symbol)
1162
                     (info, name, input_bfd, input_section,
1163
                      rel->r_offset, TRUE)))
1164
                return FALSE;
1165
              break;
1166
 
1167
            case bfd_reloc_outofrange:
1168
              msg = _("internal error: out of range error");
1169
              goto common_error;
1170
 
1171
            case bfd_reloc_notsupported:
1172
              msg = _("internal error: unsupported relocation error");
1173
              goto common_error;
1174
 
1175
            case bfd_reloc_dangerous:
1176
              msg = _("internal error: dangerous error");
1177
              goto common_error;
1178
 
1179
            default:
1180
              msg = _("internal error: unknown error");
1181
              /* fall through */
1182
 
1183
            common_error:
1184
              if (!((*info->callbacks->warning)
1185
                    (info, msg, name, input_bfd, input_section,
1186
                     rel->r_offset)))
1187
                return FALSE;
1188
              break;
1189
            }
1190
        }
1191
    }
1192
 
1193
  return TRUE;
1194
}
1195
 
1196
static asection *
1197
lm32_elf_gc_mark_hook (asection *sec,
1198
                       struct bfd_link_info *info,
1199
                       Elf_Internal_Rela *rel,
1200
                       struct elf_link_hash_entry *h,
1201
                       Elf_Internal_Sym *sym)
1202
{
1203
  if (h != NULL)
1204
    switch (ELF32_R_TYPE (rel->r_info))
1205
      {
1206
      case R_LM32_GNU_VTINHERIT:
1207
      case R_LM32_GNU_VTENTRY:
1208
        return NULL;
1209
      }
1210
 
1211
  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1212
}
1213
 
1214
static bfd_boolean
1215
lm32_elf_gc_sweep_hook (bfd *abfd,
1216
                        struct bfd_link_info *info ATTRIBUTE_UNUSED,
1217
                        asection *sec,
1218
                        const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
1219
{
1220
  /* Update the got entry reference counts for the section being removed.  */
1221
  Elf_Internal_Shdr *symtab_hdr;
1222
  struct elf_link_hash_entry **sym_hashes;
1223
  bfd_signed_vma *local_got_refcounts;
1224
  const Elf_Internal_Rela *rel, *relend;
1225
 
1226
  elf_section_data (sec)->local_dynrel = NULL;
1227
 
1228
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1229
  sym_hashes = elf_sym_hashes (abfd);
1230
  local_got_refcounts = elf_local_got_refcounts (abfd);
1231
 
1232
  relend = relocs + sec->reloc_count;
1233
  for (rel = relocs; rel < relend; rel++)
1234
    {
1235
      unsigned long r_symndx;
1236
      struct elf_link_hash_entry *h = NULL;
1237
 
1238
      r_symndx = ELF32_R_SYM (rel->r_info);
1239
      if (r_symndx >= symtab_hdr->sh_info)
1240
        {
1241
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1242
          while (h->root.type == bfd_link_hash_indirect
1243
                 || h->root.type == bfd_link_hash_warning)
1244
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
1245
        }
1246
 
1247
      switch (ELF32_R_TYPE (rel->r_info))
1248
        {
1249
        case R_LM32_16_GOT:
1250
          if (h != NULL)
1251
            {
1252
              if (h->got.refcount > 0)
1253
                h->got.refcount--;
1254
            }
1255
          else
1256
            {
1257
              if (local_got_refcounts && local_got_refcounts[r_symndx] > 0)
1258
                local_got_refcounts[r_symndx]--;
1259
            }
1260
          break;
1261
 
1262
        default:
1263
          break;
1264
        }
1265
    }
1266
  return TRUE;
1267
}
1268
 
1269
/* Look through the relocs for a section during the first phase.  */
1270
 
1271
static bfd_boolean
1272
lm32_elf_check_relocs (bfd *abfd,
1273
                       struct bfd_link_info *info,
1274
                       asection *sec,
1275
                       const Elf_Internal_Rela *relocs)
1276
{
1277
  Elf_Internal_Shdr *symtab_hdr;
1278
  struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
1279
  const Elf_Internal_Rela *rel;
1280
  const Elf_Internal_Rela *rel_end;
1281
  struct elf_lm32_link_hash_table *htab;
1282
  bfd *dynobj;
1283
 
1284
  if (info->relocatable)
1285
    return TRUE;
1286
 
1287
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1288
  sym_hashes = elf_sym_hashes (abfd);
1289
  sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
1290
  if (!elf_bad_symtab (abfd))
1291
    sym_hashes_end -= symtab_hdr->sh_info;
1292
 
1293
  htab = lm32_elf_hash_table (info);
1294
  if (htab == NULL)
1295
    return FALSE;
1296
 
1297
  dynobj = htab->root.dynobj;
1298
 
1299
  rel_end = relocs + sec->reloc_count;
1300
  for (rel = relocs; rel < rel_end; rel++)
1301
    {
1302
      int r_type;
1303
      struct elf_link_hash_entry *h;
1304
      unsigned long r_symndx;
1305
 
1306
      r_symndx = ELF32_R_SYM (rel->r_info);
1307
      r_type = ELF32_R_TYPE (rel->r_info);
1308
      if (r_symndx < symtab_hdr->sh_info)
1309
        h = NULL;
1310
      else
1311
        {
1312
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1313
          while (h->root.type == bfd_link_hash_indirect
1314
                 || h->root.type == bfd_link_hash_warning)
1315
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
1316
        }
1317
 
1318
      /* Some relocs require a global offset table.  */
1319
      if (htab->sgot == NULL)
1320
        {
1321
          switch (r_type)
1322
            {
1323
            case R_LM32_16_GOT:
1324
            case R_LM32_GOTOFF_HI16:
1325
            case R_LM32_GOTOFF_LO16:
1326
              if (dynobj == NULL)
1327
                htab->root.dynobj = dynobj = abfd;
1328
              if (! create_got_section (dynobj, info))
1329
                return FALSE;
1330
              break;
1331
            }
1332
        }
1333
 
1334
      /* Some relocs require a rofixup table. */
1335
      if (IS_FDPIC (abfd))
1336
        {
1337
          switch (r_type)
1338
            {
1339
            case R_LM32_32:
1340
              /* FDPIC requires a GOT if there is a .rofixup section
1341
                 (Normal ELF doesn't). */
1342
              if (dynobj == NULL)
1343
                htab->root.dynobj = dynobj = abfd;
1344
              if (! create_got_section (dynobj, info))
1345
                return FALSE;
1346
              /* Create .rofixup section */
1347
              if (htab->sfixup32 == NULL)
1348
                {
1349
                  if (! create_rofixup_section (abfd, info))
1350
                    return FALSE;
1351
                }
1352
              break;
1353
            case R_LM32_16_GOT:
1354
            case R_LM32_GOTOFF_HI16:
1355
            case R_LM32_GOTOFF_LO16:
1356
              /* Create .rofixup section.  */
1357
              if (htab->sfixup32 == NULL)
1358
                {
1359
                  if (! create_rofixup_section (abfd, info))
1360
                    return FALSE;
1361
                }
1362
              break;
1363
            }
1364
        }
1365
 
1366
      switch (r_type)
1367
        {
1368
        case R_LM32_16_GOT:
1369
          if (h != NULL)
1370
            h->got.refcount += 1;
1371
          else
1372
            {
1373
              bfd_signed_vma *local_got_refcounts;
1374
 
1375
              /* This is a global offset table entry for a local symbol.  */
1376
              local_got_refcounts = elf_local_got_refcounts (abfd);
1377
              if (local_got_refcounts == NULL)
1378
                {
1379
                  bfd_size_type size;
1380
 
1381
                  size = symtab_hdr->sh_info;
1382
                  size *= sizeof (bfd_signed_vma);
1383
                  local_got_refcounts = bfd_zalloc (abfd, size);
1384
                  if (local_got_refcounts == NULL)
1385
                    return FALSE;
1386
                  elf_local_got_refcounts (abfd) = local_got_refcounts;
1387
                }
1388
              local_got_refcounts[r_symndx] += 1;
1389
            }
1390
          break;
1391
 
1392
        /* This relocation describes the C++ object vtable hierarchy.
1393
           Reconstruct it for later use during GC.  */
1394
        case R_LM32_GNU_VTINHERIT:
1395
          if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1396
            return FALSE;
1397
          break;
1398
 
1399
        /* This relocation describes which C++ vtable entries are actually
1400
           used.  Record for later use during GC.  */
1401
        case R_LM32_GNU_VTENTRY:
1402
          if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1403
            return FALSE;
1404
          break;
1405
 
1406
        }
1407
    }
1408
 
1409
  return TRUE;
1410
}
1411
 
1412
/* Finish up the dynamic sections.  */
1413
 
1414
static bfd_boolean
1415
lm32_elf_finish_dynamic_sections (bfd *output_bfd,
1416
                                  struct bfd_link_info *info)
1417
{
1418
  struct elf_lm32_link_hash_table *htab;
1419
  bfd *dynobj;
1420
  asection *sdyn;
1421
  asection *sgot;
1422
 
1423
  htab = lm32_elf_hash_table (info);
1424
  if (htab == NULL)
1425
    return FALSE;
1426
 
1427
  dynobj = htab->root.dynobj;
1428
 
1429
  sgot = htab->sgotplt;
1430
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1431
 
1432
  if (htab->root.dynamic_sections_created)
1433
    {
1434
      asection *splt;
1435
      Elf32_External_Dyn *dyncon, *dynconend;
1436
 
1437
      BFD_ASSERT (sgot != NULL && sdyn != NULL);
1438
 
1439
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
1440
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1441
 
1442
      for (; dyncon < dynconend; dyncon++)
1443
        {
1444
          Elf_Internal_Dyn dyn;
1445
          asection *s;
1446
 
1447
          bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1448
 
1449
          switch (dyn.d_tag)
1450
            {
1451
            default:
1452
              break;
1453
 
1454
            case DT_PLTGOT:
1455
              s = htab->sgot->output_section;
1456
              goto get_vma;
1457
            case DT_JMPREL:
1458
              s = htab->srelplt->output_section;
1459
            get_vma:
1460
              BFD_ASSERT (s != NULL);
1461
              dyn.d_un.d_ptr = s->vma;
1462
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1463
              break;
1464
 
1465
            case DT_PLTRELSZ:
1466
              s = htab->srelplt->output_section;
1467
              BFD_ASSERT (s != NULL);
1468
              dyn.d_un.d_val = s->size;
1469
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1470
              break;
1471
 
1472
            case DT_RELASZ:
1473
              /* My reading of the SVR4 ABI indicates that the
1474
                 procedure linkage table relocs (DT_JMPREL) should be
1475
                 included in the overall relocs (DT_RELA).  This is
1476
                 what Solaris does.  However, UnixWare can not handle
1477
                 that case.  Therefore, we override the DT_RELASZ entry
1478
                 here to make it not include the JMPREL relocs.  Since
1479
                 the linker script arranges for .rela.plt to follow all
1480
                 other relocation sections, we don't have to worry
1481
                 about changing the DT_RELA entry.  */
1482
              if (htab->srelplt != NULL)
1483
                {
1484
                  s = htab->srelplt->output_section;
1485
                  dyn.d_un.d_val -= s->size;
1486
                }
1487
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1488
              break;
1489
            }
1490
        }
1491
 
1492
      /* Fill in the first entry in the procedure linkage table.  */
1493
      splt = htab->splt;
1494
      if (splt && splt->size > 0)
1495
        {
1496
          if (info->shared)
1497
            {
1498
              bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents);
1499
              bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4);
1500
              bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8);
1501
              bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12);
1502
              bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16);
1503
            }
1504
          else
1505
            {
1506
              unsigned long addr;
1507
              /* addr = .got + 4 */
1508
              addr = sgot->output_section->vma + sgot->output_offset + 4;
1509
              bfd_put_32 (output_bfd,
1510
                          PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
1511
                          splt->contents);
1512
              bfd_put_32 (output_bfd,
1513
                          PLT0_ENTRY_WORD1 | (addr & 0xffff),
1514
                          splt->contents + 4);
1515
              bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
1516
              bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
1517
              bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
1518
            }
1519
 
1520
          elf_section_data (splt->output_section)->this_hdr.sh_entsize =
1521
            PLT_ENTRY_SIZE;
1522
        }
1523
    }
1524
 
1525
  /* Fill in the first three entries in the global offset table.  */
1526
  if (sgot && sgot->size > 0)
1527
    {
1528
      if (sdyn == NULL)
1529
        bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1530
      else
1531
        bfd_put_32 (output_bfd,
1532
                    sdyn->output_section->vma + sdyn->output_offset,
1533
                    sgot->contents);
1534
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1535
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1536
 
1537
      /* FIXME:  This can be null if create_dynamic_sections wasn't called. */
1538
      if (elf_section_data (sgot->output_section) != NULL)
1539
        elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1540
    }
1541
 
1542
  if (lm32fdpic_fixup32_section (info))
1543
    {
1544
      struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
1545
      bfd_vma got_value = hgot->root.u.def.value
1546
            + hgot->root.u.def.section->output_section->vma
1547
            + hgot->root.u.def.section->output_offset;
1548
      struct bfd_link_hash_entry *hend;
1549
 
1550
      /* Last entry is pointer to GOT.  */
1551
      _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value);
1552
 
1553
      /* Check we wrote enough entries.  */
1554
      if (lm32fdpic_fixup32_section (info)->size
1555
              != (lm32fdpic_fixup32_section (info)->reloc_count * 4))
1556
        {
1557
          (*_bfd_error_handler)
1558
            ("LINKER BUG: .rofixup section size mismatch: size/4 %d != relocs %d",
1559
            lm32fdpic_fixup32_section (info)->size/4,
1560
            lm32fdpic_fixup32_section (info)->reloc_count);
1561
          return FALSE;
1562
        }
1563
 
1564
      hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__",
1565
              FALSE, FALSE, TRUE);
1566
      if (hend
1567
          && (hend->type == bfd_link_hash_defined
1568
              || hend->type == bfd_link_hash_defweak))
1569
        {
1570
          bfd_vma value =
1571
            lm32fdpic_fixup32_section (info)->output_section->vma
1572
            + lm32fdpic_fixup32_section (info)->output_offset
1573
            + lm32fdpic_fixup32_section (info)->size
1574
            - hend->u.def.section->output_section->vma
1575
            - hend->u.def.section->output_offset;
1576
          BFD_ASSERT (hend->u.def.value == value);
1577
          if (hend->u.def.value != value)
1578
            {
1579
              (*_bfd_error_handler)
1580
                ("LINKER BUG: .rofixup section hend->u.def.value != value: %ld != %ld", hend->u.def.value, value);
1581
              return FALSE;
1582
            }
1583
        }
1584
    }
1585
 
1586
  return TRUE;
1587
}
1588
 
1589
/* Finish up dynamic symbol handling.  We set the contents of various
1590
   dynamic sections here.  */
1591
 
1592
static bfd_boolean
1593
lm32_elf_finish_dynamic_symbol (bfd *output_bfd,
1594
                                struct bfd_link_info *info,
1595
                                struct elf_link_hash_entry *h,
1596
                                Elf_Internal_Sym *sym)
1597
{
1598
  struct elf_lm32_link_hash_table *htab;
1599
  bfd_byte *loc;
1600
 
1601
  htab = lm32_elf_hash_table (info);
1602
  if (htab == NULL)
1603
    return FALSE;
1604
 
1605
  if (h->plt.offset != (bfd_vma) -1)
1606
    {
1607
      asection *splt;
1608
      asection *sgot;
1609
      asection *srela;
1610
 
1611
      bfd_vma plt_index;
1612
      bfd_vma got_offset;
1613
      Elf_Internal_Rela rela;
1614
 
1615
      /* This symbol has an entry in the procedure linkage table.  Set
1616
         it up.  */
1617
      BFD_ASSERT (h->dynindx != -1);
1618
 
1619
      splt = htab->splt;
1620
      sgot = htab->sgotplt;
1621
      srela = htab->srelplt;
1622
      BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1623
 
1624
      /* Get the index in the procedure linkage table which
1625
         corresponds to this symbol.  This is the index of this symbol
1626
         in all the symbols for which we are making plt entries.  The
1627
         first entry in the procedure linkage table is reserved.  */
1628
      plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1629
 
1630
      /* Get the offset into the .got table of the entry that
1631
        corresponds to this function.  Each .got entry is 4 bytes.
1632
        The first three are reserved.  */
1633
      got_offset = (plt_index + 3) * 4;
1634
 
1635
      /* Fill in the entry in the procedure linkage table.  */
1636
      if (! info->shared)
1637
        {
1638
          /* TODO */
1639
        }
1640
      else
1641
        {
1642
          /* TODO */
1643
        }
1644
 
1645
      /* Fill in the entry in the global offset table.  */
1646
      bfd_put_32 (output_bfd,
1647
                  (splt->output_section->vma
1648
                   + splt->output_offset
1649
                   + h->plt.offset
1650
                   + 12), /* same offset */
1651
                  sgot->contents + got_offset);
1652
 
1653
      /* Fill in the entry in the .rela.plt section.  */
1654
      rela.r_offset = (sgot->output_section->vma
1655
                       + sgot->output_offset
1656
                       + got_offset);
1657
      rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT);
1658
      rela.r_addend = 0;
1659
      loc = srela->contents;
1660
      loc += plt_index * sizeof (Elf32_External_Rela);
1661
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1662
 
1663
      if (!h->def_regular)
1664
        {
1665
          /* Mark the symbol as undefined, rather than as defined in
1666
             the .plt section.  Leave the value alone.  */
1667
          sym->st_shndx = SHN_UNDEF;
1668
        }
1669
 
1670
    }
1671
 
1672
  if (h->got.offset != (bfd_vma) -1)
1673
    {
1674
      asection *sgot;
1675
      asection *srela;
1676
      Elf_Internal_Rela rela;
1677
 
1678
      /* This symbol has an entry in the global offset table.  Set it
1679
         up.  */
1680
      sgot = htab->sgot;
1681
      srela = htab->srelgot;
1682
      BFD_ASSERT (sgot != NULL && srela != NULL);
1683
 
1684
      rela.r_offset = (sgot->output_section->vma
1685
                       + sgot->output_offset
1686
                       + (h->got.offset &~ 1));
1687
 
1688
      /* If this is a -Bsymbolic link, and the symbol is defined
1689
         locally, we just want to emit a RELATIVE reloc.  Likewise if
1690
         the symbol was forced to be local because of a version file.
1691
         The entry in the global offset table will already have been
1692
         initialized in the relocate_section function.  */
1693
      if (info->shared
1694
          && (info->symbolic
1695
              || h->dynindx == -1
1696
              || h->forced_local)
1697
          && h->def_regular)
1698
        {
1699
          rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
1700
          rela.r_addend = (h->root.u.def.value
1701
                           + h->root.u.def.section->output_section->vma
1702
                           + h->root.u.def.section->output_offset);
1703
        }
1704
      else
1705
        {
1706
          BFD_ASSERT ((h->got.offset & 1) == 0);
1707
          bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
1708
          rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT);
1709
          rela.r_addend = 0;
1710
        }
1711
 
1712
      loc = srela->contents;
1713
      loc += srela->reloc_count * sizeof (Elf32_External_Rela);
1714
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1715
      ++srela->reloc_count;
1716
    }
1717
 
1718
  if (h->needs_copy)
1719
    {
1720
      asection *s;
1721
      Elf_Internal_Rela rela;
1722
 
1723
      /* This symbols needs a copy reloc.  Set it up.  */
1724
      BFD_ASSERT (h->dynindx != -1
1725
                  && (h->root.type == bfd_link_hash_defined
1726
                      || h->root.type == bfd_link_hash_defweak));
1727
 
1728
      s = bfd_get_section_by_name (h->root.u.def.section->owner,
1729
                                   ".rela.bss");
1730
      BFD_ASSERT (s != NULL);
1731
 
1732
      rela.r_offset = (h->root.u.def.value
1733
                       + h->root.u.def.section->output_section->vma
1734
                       + h->root.u.def.section->output_offset);
1735
      rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY);
1736
      rela.r_addend = 0;
1737
      loc = s->contents;
1738
      loc += s->reloc_count * sizeof (Elf32_External_Rela);
1739
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1740
      ++s->reloc_count;
1741
    }
1742
 
1743
  /* Mark some specially defined symbols as absolute.  */
1744
  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1745
      || h == htab->root.hgot)
1746
    sym->st_shndx = SHN_ABS;
1747
 
1748
  return TRUE;
1749
}
1750
 
1751
static enum elf_reloc_type_class
1752
lm32_elf_reloc_type_class (const Elf_Internal_Rela *rela)
1753
{
1754
  switch ((int) ELF32_R_TYPE (rela->r_info))
1755
    {
1756
    case R_LM32_RELATIVE:  return reloc_class_relative;
1757
    case R_LM32_JMP_SLOT:  return reloc_class_plt;
1758
    case R_LM32_COPY:      return reloc_class_copy;
1759
    default:               return reloc_class_normal;
1760
    }
1761
}
1762
 
1763
/* Adjust a symbol defined by a dynamic object and referenced by a
1764
   regular object.  The current definition is in some section of the
1765
   dynamic object, but we're not including those sections.  We have to
1766
   change the definition to something the rest of the link can
1767
   understand.  */
1768
 
1769
static bfd_boolean
1770
lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
1771
                                struct elf_link_hash_entry *h)
1772
{
1773
  struct elf_lm32_link_hash_table *htab;
1774
  struct elf_lm32_link_hash_entry *eh;
1775
  struct elf_lm32_dyn_relocs *p;
1776
  bfd *dynobj;
1777
  asection *s;
1778
 
1779
  dynobj = elf_hash_table (info)->dynobj;
1780
 
1781
  /* Make sure we know what is going on here.  */
1782
  BFD_ASSERT (dynobj != NULL
1783
              && (h->needs_plt
1784
                  || h->u.weakdef != NULL
1785
                  || (h->def_dynamic
1786
                      && h->ref_regular
1787
                      && !h->def_regular)));
1788
 
1789
  /* If this is a function, put it in the procedure linkage table.  We
1790
     will fill in the contents of the procedure linkage table later,
1791
     when we know the address of the .got section.  */
1792
  if (h->type == STT_FUNC
1793
      || h->needs_plt)
1794
    {
1795
      if (! info->shared
1796
          && !h->def_dynamic
1797
          && !h->ref_dynamic
1798
          && h->root.type != bfd_link_hash_undefweak
1799
          && h->root.type != bfd_link_hash_undefined)
1800
        {
1801
          /* This case can occur if we saw a PLT reloc in an input
1802
             file, but the symbol was never referred to by a dynamic
1803
             object.  In such a case, we don't actually need to build
1804
             a procedure linkage table, and we can just do a PCREL
1805
             reloc instead.  */
1806
          h->plt.offset = (bfd_vma) -1;
1807
          h->needs_plt = 0;
1808
        }
1809
 
1810
      return TRUE;
1811
    }
1812
  else
1813
    h->plt.offset = (bfd_vma) -1;
1814
 
1815
  /* If this is a weak symbol, and there is a real definition, the
1816
     processor independent code will have arranged for us to see the
1817
     real definition first, and we can just use the same value.  */
1818
  if (h->u.weakdef != NULL)
1819
    {
1820
      BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1821
                  || h->u.weakdef->root.type == bfd_link_hash_defweak);
1822
      h->root.u.def.section = h->u.weakdef->root.u.def.section;
1823
      h->root.u.def.value = h->u.weakdef->root.u.def.value;
1824
      return TRUE;
1825
    }
1826
 
1827
  /* This is a reference to a symbol defined by a dynamic object which
1828
     is not a function.  */
1829
 
1830
  /* If we are creating a shared library, we must presume that the
1831
     only references to the symbol are via the global offset table.
1832
     For such cases we need not do anything here; the relocations will
1833
     be handled correctly by relocate_section.  */
1834
  if (info->shared)
1835
    return TRUE;
1836
 
1837
  /* If there are no references to this symbol that do not use the
1838
     GOT, we don't need to generate a copy reloc.  */
1839
  if (!h->non_got_ref)
1840
    return TRUE;
1841
 
1842
  /* If -z nocopyreloc was given, we won't generate them either.  */
1843
  if (info->nocopyreloc)
1844
    {
1845
      h->non_got_ref = 0;
1846
      return TRUE;
1847
    }
1848
 
1849
  eh = (struct elf_lm32_link_hash_entry *) h;
1850
  for (p = eh->dyn_relocs; p != NULL; p = p->next)
1851
    {
1852
      s = p->sec->output_section;
1853
      if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
1854
        break;
1855
    }
1856
 
1857
  /* If we didn't find any dynamic relocs in sections which needs the
1858
     copy reloc, then we'll be keeping the dynamic relocs and avoiding
1859
     the copy reloc.  */
1860
  if (p == NULL)
1861
    {
1862
      h->non_got_ref = 0;
1863
      return TRUE;
1864
    }
1865
 
1866
  if (h->size == 0)
1867
    {
1868
      (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1869
                             h->root.root.string);
1870
      return TRUE;
1871
    }
1872
 
1873
  /* We must allocate the symbol in our .dynbss section, which will
1874
     become part of the .bss section of the executable.  There will be
1875
     an entry for this symbol in the .dynsym section.  The dynamic
1876
     object will contain position independent code, so all references
1877
     from the dynamic object to this symbol will go through the global
1878
     offset table.  The dynamic linker will use the .dynsym entry to
1879
     determine the address it must put in the global offset table, so
1880
     both the dynamic object and the regular object will refer to the
1881
     same memory location for the variable.  */
1882
 
1883
  htab = lm32_elf_hash_table (info);
1884
  if (htab == NULL)
1885
    return FALSE;
1886
 
1887
  s = htab->sdynbss;
1888
  BFD_ASSERT (s != NULL);
1889
 
1890
  /* We must generate a R_LM32_COPY reloc to tell the dynamic linker
1891
     to copy the initial value out of the dynamic object and into the
1892
     runtime process image.  We need to remember the offset into the
1893
     .rela.bss section we are going to use.  */
1894
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1895
    {
1896
      asection *srel;
1897
 
1898
      srel = htab->srelbss;
1899
      BFD_ASSERT (srel != NULL);
1900
      srel->size += sizeof (Elf32_External_Rela);
1901
      h->needs_copy = 1;
1902
    }
1903
 
1904
  return _bfd_elf_adjust_dynamic_copy (h, s);
1905
}
1906
 
1907
/* Allocate space in .plt, .got and associated reloc sections for
1908
   dynamic relocs.  */
1909
 
1910
static bfd_boolean
1911
allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1912
{
1913
  struct bfd_link_info *info;
1914
  struct elf_lm32_link_hash_table *htab;
1915
  struct elf_lm32_link_hash_entry *eh;
1916
  struct elf_lm32_dyn_relocs *p;
1917
 
1918
  if (h->root.type == bfd_link_hash_indirect)
1919
    return TRUE;
1920
 
1921
  if (h->root.type == bfd_link_hash_warning)
1922
    /* When warning symbols are created, they **replace** the "real"
1923
       entry in the hash table, thus we never get to see the real
1924
       symbol in a hash traversal.  So look at it now.  */
1925
    h = (struct elf_link_hash_entry *) h->root.u.i.link;
1926
 
1927
  info = (struct bfd_link_info *) inf;
1928
  htab = lm32_elf_hash_table (info);
1929
  if (htab == NULL)
1930
    return FALSE;
1931
 
1932
  eh = (struct elf_lm32_link_hash_entry *) h;
1933
 
1934
  if (htab->root.dynamic_sections_created
1935
      && h->plt.refcount > 0)
1936
    {
1937
      /* Make sure this symbol is output as a dynamic symbol.
1938
         Undefined weak syms won't yet be marked as dynamic.  */
1939
      if (h->dynindx == -1
1940
          && !h->forced_local)
1941
        {
1942
          if (! bfd_elf_link_record_dynamic_symbol (info, h))
1943
            return FALSE;
1944
        }
1945
 
1946
      if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
1947
        {
1948
          asection *s = htab->splt;
1949
 
1950
          /* If this is the first .plt entry, make room for the special
1951
             first entry.  */
1952
          if (s->size == 0)
1953
            s->size += PLT_ENTRY_SIZE;
1954
 
1955
          h->plt.offset = s->size;
1956
 
1957
          /* If this symbol is not defined in a regular file, and we are
1958
             not generating a shared library, then set the symbol to this
1959
             location in the .plt.  This is required to make function
1960
             pointers compare as equal between the normal executable and
1961
             the shared library.  */
1962
          if (! info->shared
1963
              && !h->def_regular)
1964
            {
1965
              h->root.u.def.section = s;
1966
              h->root.u.def.value = h->plt.offset;
1967
            }
1968
 
1969
          /* Make room for this entry.  */
1970
          s->size += PLT_ENTRY_SIZE;
1971
 
1972
          /* We also need to make an entry in the .got.plt section, which
1973
             will be placed in the .got section by the linker script.  */
1974
          htab->sgotplt->size += 4;
1975
 
1976
          /* We also need to make an entry in the .rel.plt section.  */
1977
          htab->srelplt->size += sizeof (Elf32_External_Rela);
1978
        }
1979
      else
1980
        {
1981
          h->plt.offset = (bfd_vma) -1;
1982
          h->needs_plt = 0;
1983
        }
1984
    }
1985
  else
1986
    {
1987
      h->plt.offset = (bfd_vma) -1;
1988
      h->needs_plt = 0;
1989
    }
1990
 
1991
  if (h->got.refcount > 0)
1992
    {
1993
      asection *s;
1994
      bfd_boolean dyn;
1995
 
1996
      /* Make sure this symbol is output as a dynamic symbol.
1997
         Undefined weak syms won't yet be marked as dynamic.  */
1998
      if (h->dynindx == -1
1999
          && !h->forced_local)
2000
        {
2001
          if (! bfd_elf_link_record_dynamic_symbol (info, h))
2002
            return FALSE;
2003
        }
2004
 
2005
      s = htab->sgot;
2006
 
2007
      h->got.offset = s->size;
2008
      s->size += 4;
2009
      dyn = htab->root.dynamic_sections_created;
2010
      if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h))
2011
        htab->srelgot->size += sizeof (Elf32_External_Rela);
2012
    }
2013
  else
2014
    h->got.offset = (bfd_vma) -1;
2015
 
2016
  if (eh->dyn_relocs == NULL)
2017
    return TRUE;
2018
 
2019
  /* In the shared -Bsymbolic case, discard space allocated for
2020
     dynamic pc-relative relocs against symbols which turn out to be
2021
     defined in regular objects.  For the normal shared case, discard
2022
     space for pc-relative relocs that have become local due to symbol
2023
     visibility changes.  */
2024
 
2025
  if (info->shared)
2026
    {
2027
      if (h->def_regular
2028
          && (h->forced_local
2029
              || info->symbolic))
2030
        {
2031
          struct elf_lm32_dyn_relocs **pp;
2032
 
2033
          for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
2034
            {
2035
              p->count -= p->pc_count;
2036
              p->pc_count = 0;
2037
              if (p->count == 0)
2038
                *pp = p->next;
2039
              else
2040
                pp = &p->next;
2041
            }
2042
        }
2043
 
2044
      /* Also discard relocs on undefined weak syms with non-default
2045
         visibility.  */
2046
      if (eh->dyn_relocs != NULL
2047
          && h->root.type == bfd_link_hash_undefweak)
2048
        {
2049
          if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2050
            eh->dyn_relocs = NULL;
2051
 
2052
          /* Make sure undefined weak symbols are output as a dynamic
2053
             symbol in PIEs.  */
2054
          else if (h->dynindx == -1
2055
                   && !h->forced_local)
2056
            {
2057
              if (! bfd_elf_link_record_dynamic_symbol (info, h))
2058
                return FALSE;
2059
            }
2060
        }
2061
    }
2062
  else
2063
    {
2064
      /* For the non-shared case, discard space for relocs against
2065
         symbols which turn out to need copy relocs or are not
2066
         dynamic.  */
2067
 
2068
      if (!h->non_got_ref
2069
          && ((h->def_dynamic
2070
               && !h->def_regular)
2071
              || (htab->root.dynamic_sections_created
2072
                  && (h->root.type == bfd_link_hash_undefweak
2073
                      || h->root.type == bfd_link_hash_undefined))))
2074
        {
2075
          /* Make sure this symbol is output as a dynamic symbol.
2076
             Undefined weak syms won't yet be marked as dynamic.  */
2077
          if (h->dynindx == -1
2078
              && !h->forced_local)
2079
            {
2080
              if (! bfd_elf_link_record_dynamic_symbol (info, h))
2081
                return FALSE;
2082
            }
2083
 
2084
          /* If that succeeded, we know we'll be keeping all the
2085
             relocs.  */
2086
          if (h->dynindx != -1)
2087
            goto keep;
2088
        }
2089
 
2090
      eh->dyn_relocs = NULL;
2091
 
2092
    keep: ;
2093
    }
2094
 
2095
  /* Finally, allocate space.  */
2096
  for (p = eh->dyn_relocs; p != NULL; p = p->next)
2097
    {
2098
      asection *sreloc = elf_section_data (p->sec)->sreloc;
2099
      sreloc->size += p->count * sizeof (Elf32_External_Rela);
2100
    }
2101
 
2102
  return TRUE;
2103
}
2104
 
2105
/* Find any dynamic relocs that apply to read-only sections.  */
2106
 
2107
static bfd_boolean
2108
readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2109
{
2110
  struct elf_lm32_link_hash_entry *eh;
2111
  struct elf_lm32_dyn_relocs *p;
2112
 
2113
  if (h->root.type == bfd_link_hash_warning)
2114
    h = (struct elf_link_hash_entry *) h->root.u.i.link;
2115
 
2116
  eh = (struct elf_lm32_link_hash_entry *) h;
2117
  for (p = eh->dyn_relocs; p != NULL; p = p->next)
2118
    {
2119
      asection *s = p->sec->output_section;
2120
 
2121
      if (s != NULL && (s->flags & SEC_READONLY) != 0)
2122
        {
2123
          struct bfd_link_info *info = (struct bfd_link_info *) inf;
2124
 
2125
          info->flags |= DF_TEXTREL;
2126
 
2127
          /* Not an error, just cut short the traversal.  */
2128
          return FALSE;
2129
        }
2130
    }
2131
  return TRUE;
2132
}
2133
 
2134
/* Set the sizes of the dynamic sections.  */
2135
 
2136
static bfd_boolean
2137
lm32_elf_size_dynamic_sections (bfd *output_bfd,
2138
                                struct bfd_link_info *info)
2139
{
2140
  struct elf_lm32_link_hash_table *htab;
2141
  bfd *dynobj;
2142
  asection *s;
2143
  bfd_boolean relocs;
2144
  bfd *ibfd;
2145
 
2146
  htab = lm32_elf_hash_table (info);
2147
  if (htab == NULL)
2148
    return FALSE;
2149
 
2150
  dynobj = htab->root.dynobj;
2151
  BFD_ASSERT (dynobj != NULL);
2152
 
2153
  if (htab->root.dynamic_sections_created)
2154
    {
2155
      /* Set the contents of the .interp section to the interpreter.  */
2156
      if (info->executable)
2157
        {
2158
          s = bfd_get_section_by_name (dynobj, ".interp");
2159
          BFD_ASSERT (s != NULL);
2160
          s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2161
          s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2162
        }
2163
    }
2164
 
2165
  /* Set up .got offsets for local syms, and space for local dynamic
2166
     relocs.  */
2167
  for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2168
    {
2169
      bfd_signed_vma *local_got;
2170
      bfd_signed_vma *end_local_got;
2171
      bfd_size_type locsymcount;
2172
      Elf_Internal_Shdr *symtab_hdr;
2173
      asection *srel;
2174
 
2175
      if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2176
        continue;
2177
 
2178
      for (s = ibfd->sections; s != NULL; s = s->next)
2179
        {
2180
          struct elf_lm32_dyn_relocs *p;
2181
 
2182
          for (p = ((struct elf_lm32_dyn_relocs *)
2183
                    elf_section_data (s)->local_dynrel);
2184
               p != NULL;
2185
               p = p->next)
2186
            {
2187
              if (! bfd_is_abs_section (p->sec)
2188
                  && bfd_is_abs_section (p->sec->output_section))
2189
                {
2190
                  /* Input section has been discarded, either because
2191
                     it is a copy of a linkonce section or due to
2192
                     linker script /DISCARD/, so we'll be discarding
2193
                     the relocs too.  */
2194
                }
2195
              else if (p->count != 0)
2196
                {
2197
                  srel = elf_section_data (p->sec)->sreloc;
2198
                  srel->size += p->count * sizeof (Elf32_External_Rela);
2199
                  if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2200
                    info->flags |= DF_TEXTREL;
2201
                }
2202
            }
2203
        }
2204
 
2205
      local_got = elf_local_got_refcounts (ibfd);
2206
      if (!local_got)
2207
        continue;
2208
 
2209
      symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2210
      locsymcount = symtab_hdr->sh_info;
2211
      end_local_got = local_got + locsymcount;
2212
      s = htab->sgot;
2213
      srel = htab->srelgot;
2214
      for (; local_got < end_local_got; ++local_got)
2215
        {
2216
          if (*local_got > 0)
2217
            {
2218
              *local_got = s->size;
2219
              s->size += 4;
2220
              if (info->shared)
2221
                srel->size += sizeof (Elf32_External_Rela);
2222
            }
2223
          else
2224
            *local_got = (bfd_vma) -1;
2225
        }
2226
    }
2227
 
2228
  /* Allocate global sym .plt and .got entries, and space for global
2229
     sym dynamic relocs.  */
2230
  elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
2231
 
2232
  /* We now have determined the sizes of the various dynamic sections.
2233
     Allocate memory for them.  */
2234
  relocs = FALSE;
2235
  for (s = dynobj->sections; s != NULL; s = s->next)
2236
    {
2237
      if ((s->flags & SEC_LINKER_CREATED) == 0)
2238
        continue;
2239
 
2240
      if (s == htab->splt
2241
          || s == htab->sgot
2242
          || s == htab->sgotplt
2243
          || s == htab->sdynbss)
2244
        {
2245
          /* Strip this section if we don't need it; see the
2246
             comment below.  */
2247
        }
2248
      else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2249
        {
2250
          if (s->size != 0 && s != htab->srelplt)
2251
            relocs = TRUE;
2252
 
2253
          /* We use the reloc_count field as a counter if we need
2254
             to copy relocs into the output file.  */
2255
          s->reloc_count = 0;
2256
        }
2257
      else
2258
        /* It's not one of our sections, so don't allocate space.  */
2259
        continue;
2260
 
2261
      if (s->size == 0)
2262
        {
2263
          /* If we don't need this section, strip it from the
2264
             output file.  This is mostly to handle .rela.bss and
2265
             .rela.plt.  We must create both sections in
2266
             create_dynamic_sections, because they must be created
2267
             before the linker maps input sections to output
2268
             sections.  The linker does that before
2269
             adjust_dynamic_symbol is called, and it is that
2270
             function which decides whether anything needs to go
2271
             into these sections.  */
2272
          s->flags |= SEC_EXCLUDE;
2273
          continue;
2274
        }
2275
 
2276
      if ((s->flags & SEC_HAS_CONTENTS) == 0)
2277
        continue;
2278
 
2279
      /* Allocate memory for the section contents.  We use bfd_zalloc
2280
         here in case unused entries are not reclaimed before the
2281
         section's contents are written out.  This should not happen,
2282
         but this way if it does, we get a R_LM32_NONE reloc instead
2283
         of garbage.  */
2284
      s->contents = bfd_zalloc (dynobj, s->size);
2285
      if (s->contents == NULL)
2286
        return FALSE;
2287
    }
2288
 
2289
  if (htab->root.dynamic_sections_created)
2290
    {
2291
      /* Add some entries to the .dynamic section.  We fill in the
2292
         values later, in lm32_elf_finish_dynamic_sections, but we
2293
         must add the entries now so that we get the correct size for
2294
         the .dynamic section.  The DT_DEBUG entry is filled in by the
2295
         dynamic linker and used by the debugger.  */
2296
#define add_dynamic_entry(TAG, VAL) \
2297
  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2298
 
2299
     if (info->executable)
2300
        {
2301
          if (! add_dynamic_entry (DT_DEBUG, 0))
2302
            return FALSE;
2303
        }
2304
 
2305
      if (htab->splt->size != 0)
2306
        {
2307
          if (! add_dynamic_entry (DT_PLTGOT, 0)
2308
              || ! add_dynamic_entry (DT_PLTRELSZ, 0)
2309
              || ! add_dynamic_entry (DT_PLTREL, DT_RELA)
2310
              || ! add_dynamic_entry (DT_JMPREL, 0))
2311
            return FALSE;
2312
        }
2313
 
2314
      if (relocs)
2315
        {
2316
          if (! add_dynamic_entry (DT_RELA, 0)
2317
              || ! add_dynamic_entry (DT_RELASZ, 0)
2318
              || ! add_dynamic_entry (DT_RELAENT,
2319
                                      sizeof (Elf32_External_Rela)))
2320
            return FALSE;
2321
 
2322
          /* If any dynamic relocs apply to a read-only section,
2323
             then we need a DT_TEXTREL entry.  */
2324
          if ((info->flags & DF_TEXTREL) == 0)
2325
            elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
2326
                                    info);
2327
 
2328
          if ((info->flags & DF_TEXTREL) != 0)
2329
            {
2330
              if (! add_dynamic_entry (DT_TEXTREL, 0))
2331
                return FALSE;
2332
            }
2333
        }
2334
    }
2335
#undef add_dynamic_entry
2336
 
2337
  /* Allocate .rofixup section.  */
2338
  if (IS_FDPIC (output_bfd))
2339
    {
2340
      struct weak_symbol_list *list_start = NULL, *list_end = NULL;
2341
      int rgot_weak_count = 0;
2342
      int r32_count = 0;
2343
      int rgot_count = 0;
2344
      /* Look for deleted sections.  */
2345
      for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2346
        {
2347
          for (s = ibfd->sections; s != NULL; s = s->next)
2348
            {
2349
              if (s->reloc_count)
2350
                {
2351
                  /* Count relocs that need .rofixup entires.  */
2352
                  Elf_Internal_Rela *internal_relocs, *end;
2353
                  internal_relocs = elf_section_data (s)->relocs;
2354
                  if (internal_relocs == NULL)
2355
                    internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE));
2356
                  if (internal_relocs != NULL)
2357
                    {
2358
                      end = internal_relocs + s->reloc_count;
2359
                      while (internal_relocs < end)
2360
                        {
2361
                          Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2362
                          struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
2363
                          unsigned long r_symndx;
2364
                          struct elf_link_hash_entry *h;
2365
 
2366
                          symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2367
                          sym_hashes = elf_sym_hashes (ibfd);
2368
                          r_symndx = ELF32_R_SYM (internal_relocs->r_info);
2369
                          h = NULL;
2370
                          if (r_symndx < symtab_hdr->sh_info)
2371
                            {
2372
                            }
2373
                          else
2374
                            {
2375
                              h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2376
                              while (h->root.type == bfd_link_hash_indirect
2377
                                     || h->root.type == bfd_link_hash_warning)
2378
                                h = (struct elf_link_hash_entry *) h->root.u.i.link;
2379
                              }
2380
 
2381
                          /* Don't generate entries for weak symbols.  */
2382
                          if (!h || (h && h->root.type != bfd_link_hash_undefweak))
2383
                            {
2384
                              if (!elf_discarded_section (s) && !((bfd_get_section_flags (ibfd, s) & SEC_ALLOC) == 0))
2385
                                {
2386
                                  switch (ELF32_R_TYPE (internal_relocs->r_info))
2387
                                    {
2388
                                    case R_LM32_32:
2389
                                      r32_count++;
2390
                                      break;
2391
                                    case R_LM32_16_GOT:
2392
                                      rgot_count++;
2393
                                      break;
2394
                                    }
2395
                                }
2396
                            }
2397
                          else
2398
                            {
2399
                              struct weak_symbol_list *current, *new_entry;
2400
                              /* Is this symbol already in the list?  */
2401
                              for (current = list_start; current; current = current->next)
2402
                                {
2403
                                  if (!strcmp (current->name, h->root.root.string))
2404
                                    break;
2405
                                }
2406
                              if (!current && !elf_discarded_section (s) && (bfd_get_section_flags (ibfd, s) & SEC_ALLOC))
2407
                                {
2408
                                  /* Will this have an entry in the GOT.  */
2409
                                  if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT)
2410
                                    {
2411
                                      /* Create a new entry.  */
2412
                                      new_entry = malloc (sizeof (struct weak_symbol_list));
2413
                                      if (!new_entry)
2414
                                        return FALSE;
2415
                                      new_entry->name = h->root.root.string;
2416
                                      new_entry->next = NULL;
2417
                                      /* Add to list */
2418
                                      if (list_start == NULL)
2419
                                        {
2420
                                          list_start = new_entry;
2421
                                          list_end = new_entry;
2422
                                        }
2423
                                      else
2424
                                        {
2425
                                          list_end->next = new_entry;
2426
                                          list_end = new_entry;
2427
                                        }
2428
                                      /* Increase count of undefined weak symbols in the got.  */
2429
                                      rgot_weak_count++;
2430
                                    }
2431
                                }
2432
                            }
2433
                          internal_relocs++;
2434
                        }
2435
                    }
2436
                  else
2437
                    return FALSE;
2438
                }
2439
            }
2440
        }
2441
      /* Free list.  */
2442
      while (list_start)
2443
        {
2444
          list_end = list_start->next;
2445
          free (list_start);
2446
          list_start = list_end;
2447
        }
2448
 
2449
      /* Size sections.  */
2450
      lm32fdpic_fixup32_section (info)->size = (r32_count + (htab->sgot->size / 4) - rgot_weak_count + 1) * 4;
2451
      if (lm32fdpic_fixup32_section (info)->size == 0)
2452
        lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE;
2453
      else
2454
        {
2455
          lm32fdpic_fixup32_section (info)->contents =
2456
             bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size);
2457
          if (lm32fdpic_fixup32_section (info)->contents == NULL)
2458
            return FALSE;
2459
        }
2460
    }
2461
 
2462
  return TRUE;
2463
}
2464
 
2465
/* Create dynamic sections when linking against a dynamic object.  */
2466
 
2467
static bfd_boolean
2468
lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2469
{
2470
  struct elf_lm32_link_hash_table *htab;
2471
  flagword flags, pltflags;
2472
  asection *s;
2473
  const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2474
  int ptralign = 2; /* 32bit */
2475
 
2476
  htab = lm32_elf_hash_table (info);
2477
  if (htab == NULL)
2478
    return FALSE;
2479
 
2480
  /* Make sure we have a GOT - For the case where we have a dynamic object
2481
     but none of the relocs in check_relocs */
2482
  if (! create_got_section (abfd, info))
2483
    return FALSE;
2484
  if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL))
2485
    {
2486
      if (! create_rofixup_section (abfd, info))
2487
        return FALSE;
2488
    }
2489
 
2490
  /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2491
     .rel[a].bss sections.  */
2492
  flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2493
           | SEC_LINKER_CREATED);
2494
 
2495
  pltflags = flags;
2496
  pltflags |= SEC_CODE;
2497
  if (bed->plt_not_loaded)
2498
    pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
2499
  if (bed->plt_readonly)
2500
    pltflags |= SEC_READONLY;
2501
 
2502
  s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
2503
  htab->splt = s;
2504
  if (s == NULL
2505
      || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
2506
    return FALSE;
2507
 
2508
  if (bed->want_plt_sym)
2509
    {
2510
      /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
2511
         .plt section.  */
2512
      struct bfd_link_hash_entry *bh = NULL;
2513
      struct elf_link_hash_entry *h;
2514
 
2515
      if (! (_bfd_generic_link_add_one_symbol
2516
             (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
2517
              (bfd_vma) 0, NULL, FALSE,
2518
              get_elf_backend_data (abfd)->collect, &bh)))
2519
        return FALSE;
2520
      h = (struct elf_link_hash_entry *) bh;
2521
      h->def_regular = 1;
2522
      h->type = STT_OBJECT;
2523
      htab->root.hplt = h;
2524
 
2525
      if (info->shared
2526
          && ! bfd_elf_link_record_dynamic_symbol (info, h))
2527
        return FALSE;
2528
    }
2529
 
2530
  s = bfd_make_section_with_flags (abfd,
2531
                                   bed->default_use_rela_p ? ".rela.plt" : ".rel.plt",
2532
                                   flags | SEC_READONLY);
2533
  htab->srelplt = s;
2534
  if (s == NULL
2535
      || ! bfd_set_section_alignment (abfd, s, ptralign))
2536
    return FALSE;
2537
 
2538
  if (htab->sgot == NULL
2539
      && ! create_got_section (abfd, info))
2540
    return FALSE;
2541
 
2542
  {
2543
    const char *secname;
2544
    char *relname;
2545
    flagword secflags;
2546
    asection *sec;
2547
 
2548
    for (sec = abfd->sections; sec; sec = sec->next)
2549
      {
2550
        secflags = bfd_get_section_flags (abfd, sec);
2551
        if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
2552
            || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
2553
          continue;
2554
        secname = bfd_get_section_name (abfd, sec);
2555
        relname = bfd_malloc ((bfd_size_type) strlen (secname) + 6);
2556
        strcpy (relname, ".rela");
2557
        strcat (relname, secname);
2558
        if (bfd_get_section_by_name (abfd, secname))
2559
          continue;
2560
        s = bfd_make_section_with_flags (abfd, relname,
2561
                                         flags | SEC_READONLY);
2562
        if (s == NULL
2563
            || ! bfd_set_section_alignment (abfd, s, ptralign))
2564
          return FALSE;
2565
      }
2566
  }
2567
 
2568
  if (bed->want_dynbss)
2569
    {
2570
      /* The .dynbss section is a place to put symbols which are defined
2571
         by dynamic objects, are referenced by regular objects, and are
2572
         not functions.  We must allocate space for them in the process
2573
         image and use a R_*_COPY reloc to tell the dynamic linker to
2574
         initialize them at run time.  The linker script puts the .dynbss
2575
         section into the .bss section of the final image.  */
2576
      s = bfd_make_section_with_flags (abfd, ".dynbss",
2577
                                       SEC_ALLOC | SEC_LINKER_CREATED);
2578
      htab->sdynbss = s;
2579
      if (s == NULL)
2580
        return FALSE;
2581
      /* The .rel[a].bss section holds copy relocs.  This section is not
2582
         normally needed.  We need to create it here, though, so that the
2583
         linker will map it to an output section.  We can't just create it
2584
         only if we need it, because we will not know whether we need it
2585
         until we have seen all the input files, and the first time the
2586
         main linker code calls BFD after examining all the input files
2587
         (size_dynamic_sections) the input sections have already been
2588
         mapped to the output sections.  If the section turns out not to
2589
         be needed, we can discard it later.  We will never need this
2590
         section when generating a shared object, since they do not use
2591
         copy relocs.  */
2592
      if (! info->shared)
2593
        {
2594
          s = bfd_make_section_with_flags (abfd,
2595
                                           (bed->default_use_rela_p
2596
                                            ? ".rela.bss" : ".rel.bss"),
2597
                                           flags | SEC_READONLY);
2598
          htab->srelbss = s;
2599
          if (s == NULL
2600
              || ! bfd_set_section_alignment (abfd, s, ptralign))
2601
            return FALSE;
2602
        }
2603
    }
2604
 
2605
  return TRUE;
2606
}
2607
 
2608
/* Copy the extra info we tack onto an elf_link_hash_entry.  */
2609
 
2610
static void
2611
lm32_elf_copy_indirect_symbol (struct bfd_link_info *info,
2612
                               struct elf_link_hash_entry *dir,
2613
                               struct elf_link_hash_entry *ind)
2614
{
2615
  struct elf_lm32_link_hash_entry * edir;
2616
  struct elf_lm32_link_hash_entry * eind;
2617
 
2618
  edir = (struct elf_lm32_link_hash_entry *) dir;
2619
  eind = (struct elf_lm32_link_hash_entry *) ind;
2620
 
2621
  if (eind->dyn_relocs != NULL)
2622
    {
2623
      if (edir->dyn_relocs != NULL)
2624
        {
2625
          struct elf_lm32_dyn_relocs **pp;
2626
          struct elf_lm32_dyn_relocs *p;
2627
 
2628
          /* Add reloc counts against the indirect sym to the direct sym
2629
             list.  Merge any entries against the same section.  */
2630
          for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2631
            {
2632
              struct elf_lm32_dyn_relocs *q;
2633
 
2634
              for (q = edir->dyn_relocs; q != NULL; q = q->next)
2635
                if (q->sec == p->sec)
2636
                  {
2637
                    q->pc_count += p->pc_count;
2638
                    q->count += p->count;
2639
                    *pp = p->next;
2640
                    break;
2641
                  }
2642
              if (q == NULL)
2643
                pp = &p->next;
2644
            }
2645
          *pp = edir->dyn_relocs;
2646
        }
2647
 
2648
      edir->dyn_relocs = eind->dyn_relocs;
2649
      eind->dyn_relocs = NULL;
2650
    }
2651
 
2652
  _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2653
}
2654
 
2655
static bfd_boolean
2656
lm32_elf_always_size_sections (bfd *output_bfd,
2657
                                 struct bfd_link_info *info)
2658
{
2659
  if (!info->relocatable)
2660
    {
2661
      struct elf_link_hash_entry *h;
2662
 
2663
      /* Force a PT_GNU_STACK segment to be created.  */
2664
      if (! elf_tdata (output_bfd)->stack_flags)
2665
        elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
2666
 
2667
      /* Define __stacksize if it's not defined yet.  */
2668
      h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
2669
                                FALSE, FALSE, FALSE);
2670
      if (! h || h->root.type != bfd_link_hash_defined
2671
          || h->type != STT_OBJECT
2672
          || !h->def_regular)
2673
        {
2674
          struct bfd_link_hash_entry *bh = NULL;
2675
 
2676
          if (!(_bfd_generic_link_add_one_symbol
2677
                (info, output_bfd, "__stacksize",
2678
                 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
2679
                 (const char *) NULL, FALSE,
2680
                 get_elf_backend_data (output_bfd)->collect, &bh)))
2681
            return FALSE;
2682
 
2683
          h = (struct elf_link_hash_entry *) bh;
2684
          h->def_regular = 1;
2685
          h->type = STT_OBJECT;
2686
          /* This one must NOT be hidden.  */
2687
        }
2688
    }
2689
 
2690
  return TRUE;
2691
}
2692
 
2693
static bfd_boolean
2694
lm32_elf_modify_segment_map (bfd *output_bfd,
2695
                             struct bfd_link_info *info)
2696
{
2697
  struct elf_segment_map *m;
2698
 
2699
  /* objcopy and strip preserve what's already there using elf32_lm32fdpic_copy_
2700
     private_bfd_data ().  */
2701
  if (! info)
2702
    return TRUE;
2703
 
2704
  for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
2705
    if (m->p_type == PT_GNU_STACK)
2706
      break;
2707
 
2708
  if (m)
2709
    {
2710
      asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
2711
      struct elf_link_hash_entry *h;
2712
 
2713
      if (sec)
2714
        {
2715
          /* Obtain the pointer to the __stacksize symbol.  */
2716
          h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
2717
                                    FALSE, FALSE, FALSE);
2718
          while (h->root.type == bfd_link_hash_indirect
2719
                 || h->root.type == bfd_link_hash_warning)
2720
            h = (struct elf_link_hash_entry *)h->root.u.i.link;
2721
          BFD_ASSERT (h->root.type == bfd_link_hash_defined);
2722
 
2723
          /* Set the section size from the symbol value.  We
2724
             intentionally ignore the symbol section.  */
2725
          if (h->root.type == bfd_link_hash_defined)
2726
            sec->size = h->root.u.def.value;
2727
          else
2728
            sec->size = DEFAULT_STACK_SIZE;
2729
 
2730
          /* Add the stack section to the PT_GNU_STACK segment,
2731
             such that its size and alignment requirements make it
2732
             to the segment.  */
2733
          m->sections[m->count] = sec;
2734
          m->count++;
2735
        }
2736
    }
2737
 
2738
  return TRUE;
2739
}
2740
 
2741
static bfd_boolean
2742
lm32_elf_modify_program_headers (bfd *output_bfd,
2743
                                       struct bfd_link_info *info)
2744
{
2745
  struct elf_obj_tdata *tdata = elf_tdata (output_bfd);
2746
  struct elf_segment_map *m;
2747
  Elf_Internal_Phdr *p;
2748
 
2749
  if (! info)
2750
    return TRUE;
2751
 
2752
  for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++)
2753
    if (m->p_type == PT_GNU_STACK)
2754
      break;
2755
 
2756
  if (m)
2757
    {
2758
      struct elf_link_hash_entry *h;
2759
 
2760
      /* Obtain the pointer to the __stacksize symbol.  */
2761
      h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
2762
                                FALSE, FALSE, FALSE);
2763
      if (h)
2764
        {
2765
          while (h->root.type == bfd_link_hash_indirect
2766
                 || h->root.type == bfd_link_hash_warning)
2767
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
2768
          BFD_ASSERT (h->root.type == bfd_link_hash_defined);
2769
        }
2770
 
2771
      /* Set the header p_memsz from the symbol value.  We
2772
         intentionally ignore the symbol section.  */
2773
      if (h && h->root.type == bfd_link_hash_defined)
2774
        p->p_memsz = h->root.u.def.value;
2775
      else
2776
        p->p_memsz = DEFAULT_STACK_SIZE;
2777
 
2778
      p->p_align = 8;
2779
    }
2780
 
2781
  return TRUE;
2782
}
2783
 
2784
 
2785
static bfd_boolean
2786
lm32_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
2787
{
2788
  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2789
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2790
    return TRUE;
2791
 
2792
  BFD_ASSERT (!elf_flags_init (obfd)
2793
              || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
2794
 
2795
  elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
2796
  elf_flags_init (obfd) = TRUE;
2797
 
2798
  /* Copy object attributes.  */
2799
  _bfd_elf_copy_obj_attributes (ibfd, obfd);
2800
 
2801
  return TRUE;
2802
}
2803
 
2804
 
2805
static bfd_boolean
2806
lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
2807
{
2808
  unsigned i;
2809
 
2810
  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2811
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2812
    return TRUE;
2813
 
2814
  if (! lm32_elf_copy_private_bfd_data (ibfd, obfd))
2815
    return FALSE;
2816
 
2817
  if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
2818
      || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
2819
    return TRUE;
2820
 
2821
  /* Copy the stack size.  */
2822
  for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
2823
    if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
2824
      {
2825
        Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
2826
 
2827
        for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
2828
          if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
2829
            {
2830
              memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
2831
 
2832
              /* Rewrite the phdrs, since we're only called after they were first written.  */
2833
              if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
2834
                            ->s->sizeof_ehdr, SEEK_SET) != 0
2835
                  || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
2836
                                     elf_elfheader (obfd)->e_phnum) != 0)
2837
                return FALSE;
2838
              break;
2839
            }
2840
 
2841
        break;
2842
      }
2843
 
2844
  return TRUE;
2845
}
2846
 
2847
 
2848
#define ELF_ARCH                bfd_arch_lm32
2849
#define ELF_TARGET_ID           LM32_ELF_DATA
2850
#define ELF_MACHINE_CODE        EM_LATTICEMICO32
2851
#define ELF_MAXPAGESIZE         0x1000
2852
 
2853
#define TARGET_BIG_SYM          bfd_elf32_lm32_vec
2854
#define TARGET_BIG_NAME         "elf32-lm32"
2855
 
2856
#define bfd_elf32_bfd_reloc_type_lookup         lm32_reloc_type_lookup
2857
#define bfd_elf32_bfd_reloc_name_lookup         lm32_reloc_name_lookup
2858
#define elf_info_to_howto                       lm32_info_to_howto_rela
2859
#define elf_info_to_howto_rel                   0
2860
#define elf_backend_rela_normal                 1
2861
#define elf_backend_object_p                    lm32_elf_object_p
2862
#define elf_backend_final_write_processing      lm32_elf_final_write_processing
2863
#define elf_backend_can_gc_sections             1
2864
#define elf_backend_can_refcount                1
2865
#define elf_backend_gc_mark_hook                lm32_elf_gc_mark_hook
2866
#define elf_backend_gc_sweep_hook               lm32_elf_gc_sweep_hook
2867
#define elf_backend_plt_readonly                1
2868
#define elf_backend_want_got_plt                1
2869
#define elf_backend_want_plt_sym                0
2870
#define elf_backend_got_header_size             12
2871
#define bfd_elf32_bfd_link_hash_table_create    lm32_elf_link_hash_table_create
2872
#define elf_backend_check_relocs                lm32_elf_check_relocs
2873
#define elf_backend_reloc_type_class            lm32_elf_reloc_type_class
2874
#define elf_backend_copy_indirect_symbol        lm32_elf_copy_indirect_symbol
2875
#define elf_backend_size_dynamic_sections       lm32_elf_size_dynamic_sections
2876
#define elf_backend_omit_section_dynsym         ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
2877
#define elf_backend_create_dynamic_sections     lm32_elf_create_dynamic_sections
2878
#define elf_backend_finish_dynamic_sections     lm32_elf_finish_dynamic_sections
2879
#define elf_backend_adjust_dynamic_symbol       lm32_elf_adjust_dynamic_symbol
2880
#define elf_backend_finish_dynamic_symbol       lm32_elf_finish_dynamic_symbol
2881
#define elf_backend_relocate_section            lm32_elf_relocate_section
2882
 
2883
#include "elf32-target.h"
2884
 
2885
#undef  ELF_MAXPAGESIZE
2886
#define ELF_MAXPAGESIZE         0x4000
2887
 
2888
 
2889
#undef  TARGET_BIG_SYM
2890
#define TARGET_BIG_SYM          bfd_elf32_lm32fdpic_vec
2891
#undef  TARGET_BIG_NAME
2892
#define TARGET_BIG_NAME         "elf32-lm32fdpic"
2893
#undef  elf32_bed
2894
#define elf32_bed               elf32_lm32fdpic_bed
2895
 
2896
#undef  elf_backend_always_size_sections
2897
#define elf_backend_always_size_sections        lm32_elf_always_size_sections
2898
#undef  elf_backend_modify_segment_map
2899
#define elf_backend_modify_segment_map          lm32_elf_modify_segment_map
2900
#undef  elf_backend_modify_program_headers
2901
#define elf_backend_modify_program_headers      lm32_elf_modify_program_headers
2902
#undef  bfd_elf32_bfd_copy_private_bfd_data
2903
#define bfd_elf32_bfd_copy_private_bfd_data     lm32_elf_fdpic_copy_private_bfd_data
2904
 
2905
#include "elf32-target.h"

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.