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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [bfd/] [elf-m10300.c] - Blame information for rev 298

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1 14 khays
/* Matsushita 10300 specific support for 32-bit ELF
2
   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
3 148 khays
   2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4 14 khays
 
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 "sysdep.h"
23
#include "bfd.h"
24
#include "libbfd.h"
25
#include "elf-bfd.h"
26
#include "elf/mn10300.h"
27
#include "libiberty.h"
28
 
29
/* The mn10300 linker needs to keep track of the number of relocs that
30
   it decides to copy in check_relocs for each symbol.  This is so
31
   that it can discard PC relative relocs if it doesn't need them when
32
   linking with -Bsymbolic.  We store the information in a field
33
   extending the regular ELF linker hash table.  */
34
 
35
struct elf32_mn10300_link_hash_entry
36
{
37
  /* The basic elf link hash table entry.  */
38
  struct elf_link_hash_entry root;
39
 
40
  /* For function symbols, the number of times this function is
41
     called directly (ie by name).  */
42
  unsigned int direct_calls;
43
 
44
  /* For function symbols, the size of this function's stack
45
     (if <= 255 bytes).  We stuff this into "call" instructions
46
     to this target when it's valid and profitable to do so.
47
 
48
     This does not include stack allocated by movm!  */
49
  unsigned char stack_size;
50
 
51
  /* For function symbols, arguments (if any) for movm instruction
52
     in the prologue.  We stuff this value into "call" instructions
53
     to the target when it's valid and profitable to do so.  */
54
  unsigned char movm_args;
55
 
56
  /* For function symbols, the amount of stack space that would be allocated
57
     by the movm instruction.  This is redundant with movm_args, but we
58
     add it to the hash table to avoid computing it over and over.  */
59
  unsigned char movm_stack_size;
60
 
61
/* When set, convert all "call" instructions to this target into "calls"
62
   instructions.  */
63
#define MN10300_CONVERT_CALL_TO_CALLS 0x1
64
 
65
/* Used to mark functions which have had redundant parts of their
66
   prologue deleted.  */
67
#define MN10300_DELETED_PROLOGUE_BYTES 0x2
68
  unsigned char flags;
69
 
70
  /* Calculated value.  */
71
  bfd_vma value;
72
};
73
 
74
/* We derive a hash table from the main elf linker hash table so
75
   we can store state variables and a secondary hash table without
76
   resorting to global variables.  */
77
struct elf32_mn10300_link_hash_table
78
{
79
  /* The main hash table.  */
80
  struct elf_link_hash_table root;
81
 
82
  /* A hash table for static functions.  We could derive a new hash table
83
     instead of using the full elf32_mn10300_link_hash_table if we wanted
84
     to save some memory.  */
85
  struct elf32_mn10300_link_hash_table *static_hash_table;
86
 
87
  /* Random linker state flags.  */
88
#define MN10300_HASH_ENTRIES_INITIALIZED 0x1
89
  char flags;
90
};
91
 
92
#ifndef streq
93
#define streq(a, b) (strcmp ((a),(b)) == 0)
94
#endif
95
 
96
/* For MN10300 linker hash table.  */
97
 
98
/* Get the MN10300 ELF linker hash table from a link_info structure.  */
99
 
100
#define elf32_mn10300_hash_table(p) \
101
  (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
102
  == MN10300_ELF_DATA ? ((struct elf32_mn10300_link_hash_table *) ((p)->hash)) : NULL)
103
 
104
#define elf32_mn10300_link_hash_traverse(table, func, info)             \
105
  (elf_link_hash_traverse                                               \
106
   (&(table)->root,                                                     \
107
    (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func),    \
108
    (info)))
109
 
110
static reloc_howto_type elf_mn10300_howto_table[] =
111
{
112
  /* Dummy relocation.  Does nothing.  */
113
  HOWTO (R_MN10300_NONE,
114
         0,
115
         2,
116
         16,
117
         FALSE,
118
         0,
119
         complain_overflow_bitfield,
120
         bfd_elf_generic_reloc,
121
         "R_MN10300_NONE",
122
         FALSE,
123
         0,
124
         0,
125
         FALSE),
126
  /* Standard 32 bit reloc.  */
127
  HOWTO (R_MN10300_32,
128
         0,
129
         2,
130
         32,
131
         FALSE,
132
         0,
133
         complain_overflow_bitfield,
134
         bfd_elf_generic_reloc,
135
         "R_MN10300_32",
136
         FALSE,
137
         0xffffffff,
138
         0xffffffff,
139
         FALSE),
140
  /* Standard 16 bit reloc.  */
141
  HOWTO (R_MN10300_16,
142
         0,
143
         1,
144
         16,
145
         FALSE,
146
         0,
147
         complain_overflow_bitfield,
148
         bfd_elf_generic_reloc,
149
         "R_MN10300_16",
150
         FALSE,
151
         0xffff,
152
         0xffff,
153
         FALSE),
154
  /* Standard 8 bit reloc.  */
155
  HOWTO (R_MN10300_8,
156
         0,
157
         0,
158
         8,
159
         FALSE,
160
         0,
161
         complain_overflow_bitfield,
162
         bfd_elf_generic_reloc,
163
         "R_MN10300_8",
164
         FALSE,
165
         0xff,
166
         0xff,
167
         FALSE),
168
  /* Standard 32bit pc-relative reloc.  */
169
  HOWTO (R_MN10300_PCREL32,
170
         0,
171
         2,
172
         32,
173
         TRUE,
174
         0,
175
         complain_overflow_bitfield,
176
         bfd_elf_generic_reloc,
177
         "R_MN10300_PCREL32",
178
         FALSE,
179
         0xffffffff,
180
         0xffffffff,
181
         TRUE),
182
  /* Standard 16bit pc-relative reloc.  */
183
  HOWTO (R_MN10300_PCREL16,
184
         0,
185
         1,
186
         16,
187
         TRUE,
188
         0,
189
         complain_overflow_bitfield,
190
         bfd_elf_generic_reloc,
191
         "R_MN10300_PCREL16",
192
         FALSE,
193
         0xffff,
194
         0xffff,
195
         TRUE),
196
  /* Standard 8 pc-relative reloc.  */
197
  HOWTO (R_MN10300_PCREL8,
198
         0,
199
         0,
200
         8,
201
         TRUE,
202
         0,
203
         complain_overflow_bitfield,
204
         bfd_elf_generic_reloc,
205
         "R_MN10300_PCREL8",
206
         FALSE,
207
         0xff,
208
         0xff,
209
         TRUE),
210
 
211
  /* GNU extension to record C++ vtable hierarchy.  */
212
  HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
213
         0,                      /* rightshift */
214
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
215
         0,                      /* bitsize */
216
         FALSE,                 /* pc_relative */
217
         0,                      /* bitpos */
218
         complain_overflow_dont, /* complain_on_overflow */
219
         NULL,                  /* special_function */
220
         "R_MN10300_GNU_VTINHERIT", /* name */
221
         FALSE,                 /* partial_inplace */
222
         0,                      /* src_mask */
223
         0,                      /* dst_mask */
224
         FALSE),                /* pcrel_offset */
225
 
226
  /* GNU extension to record C++ vtable member usage */
227
  HOWTO (R_MN10300_GNU_VTENTRY, /* type */
228
         0,                      /* rightshift */
229
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
230
         0,                      /* bitsize */
231
         FALSE,                 /* pc_relative */
232
         0,                      /* bitpos */
233
         complain_overflow_dont, /* complain_on_overflow */
234
         NULL,                  /* special_function */
235
         "R_MN10300_GNU_VTENTRY", /* name */
236
         FALSE,                 /* partial_inplace */
237
         0,                      /* src_mask */
238
         0,                      /* dst_mask */
239
         FALSE),                /* pcrel_offset */
240
 
241
  /* Standard 24 bit reloc.  */
242
  HOWTO (R_MN10300_24,
243
         0,
244
         2,
245
         24,
246
         FALSE,
247
         0,
248
         complain_overflow_bitfield,
249
         bfd_elf_generic_reloc,
250
         "R_MN10300_24",
251
         FALSE,
252
         0xffffff,
253
         0xffffff,
254
         FALSE),
255
  HOWTO (R_MN10300_GOTPC32,     /* type */
256
         0,                      /* rightshift */
257
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
258
         32,                    /* bitsize */
259
         TRUE,                  /* pc_relative */
260
         0,                      /* bitpos */
261
         complain_overflow_bitfield, /* complain_on_overflow */
262
         bfd_elf_generic_reloc, /* */
263
         "R_MN10300_GOTPC32",   /* name */
264
         FALSE,                 /* partial_inplace */
265
         0xffffffff,            /* src_mask */
266
         0xffffffff,            /* dst_mask */
267
         TRUE),                 /* pcrel_offset */
268
 
269
  HOWTO (R_MN10300_GOTPC16,     /* type */
270
         0,                      /* rightshift */
271
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
272
         16,                    /* bitsize */
273
         TRUE,                  /* pc_relative */
274
         0,                      /* bitpos */
275
         complain_overflow_bitfield, /* complain_on_overflow */
276
         bfd_elf_generic_reloc, /* */
277
         "R_MN10300_GOTPC16",   /* name */
278
         FALSE,                 /* partial_inplace */
279
         0xffff,                /* src_mask */
280
         0xffff,                /* dst_mask */
281
         TRUE),                 /* pcrel_offset */
282
 
283
  HOWTO (R_MN10300_GOTOFF32,    /* type */
284
         0,                      /* rightshift */
285
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
286
         32,                    /* bitsize */
287
         FALSE,                 /* pc_relative */
288
         0,                      /* bitpos */
289
         complain_overflow_bitfield, /* complain_on_overflow */
290
         bfd_elf_generic_reloc, /* */
291
         "R_MN10300_GOTOFF32",  /* name */
292
         FALSE,                 /* partial_inplace */
293
         0xffffffff,            /* src_mask */
294
         0xffffffff,            /* dst_mask */
295
         FALSE),                /* pcrel_offset */
296
 
297
  HOWTO (R_MN10300_GOTOFF24,    /* type */
298
         0,                      /* rightshift */
299
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
300
         24,                    /* bitsize */
301
         FALSE,                 /* pc_relative */
302
         0,                      /* bitpos */
303
         complain_overflow_bitfield, /* complain_on_overflow */
304
         bfd_elf_generic_reloc, /* */
305
         "R_MN10300_GOTOFF24",  /* name */
306
         FALSE,                 /* partial_inplace */
307
         0xffffff,              /* src_mask */
308
         0xffffff,              /* dst_mask */
309
         FALSE),                /* pcrel_offset */
310
 
311
  HOWTO (R_MN10300_GOTOFF16,    /* type */
312
         0,                      /* rightshift */
313
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
314
         16,                    /* bitsize */
315
         FALSE,                 /* pc_relative */
316
         0,                      /* bitpos */
317
         complain_overflow_bitfield, /* complain_on_overflow */
318
         bfd_elf_generic_reloc, /* */
319
         "R_MN10300_GOTOFF16",  /* name */
320
         FALSE,                 /* partial_inplace */
321
         0xffff,                /* src_mask */
322
         0xffff,                /* dst_mask */
323
         FALSE),                /* pcrel_offset */
324
 
325
  HOWTO (R_MN10300_PLT32,       /* type */
326
         0,                      /* rightshift */
327
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
328
         32,                    /* bitsize */
329
         TRUE,                  /* pc_relative */
330
         0,                      /* bitpos */
331
         complain_overflow_bitfield, /* complain_on_overflow */
332
         bfd_elf_generic_reloc, /* */
333
         "R_MN10300_PLT32",     /* name */
334
         FALSE,                 /* partial_inplace */
335
         0xffffffff,            /* src_mask */
336
         0xffffffff,            /* dst_mask */
337
         TRUE),                 /* pcrel_offset */
338
 
339
  HOWTO (R_MN10300_PLT16,       /* type */
340
         0,                      /* rightshift */
341
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
342
         16,                    /* bitsize */
343
         TRUE,                  /* pc_relative */
344
         0,                      /* bitpos */
345
         complain_overflow_bitfield, /* complain_on_overflow */
346
         bfd_elf_generic_reloc, /* */
347
         "R_MN10300_PLT16",     /* name */
348
         FALSE,                 /* partial_inplace */
349
         0xffff,                /* src_mask */
350
         0xffff,                /* dst_mask */
351
         TRUE),                 /* pcrel_offset */
352
 
353
  HOWTO (R_MN10300_GOT32,       /* type */
354
         0,                      /* rightshift */
355
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
356
         32,                    /* bitsize */
357
         FALSE,                 /* pc_relative */
358
         0,                      /* bitpos */
359
         complain_overflow_bitfield, /* complain_on_overflow */
360
         bfd_elf_generic_reloc, /* */
361
         "R_MN10300_GOT32",     /* name */
362
         FALSE,                 /* partial_inplace */
363
         0xffffffff,            /* src_mask */
364
         0xffffffff,            /* dst_mask */
365
         FALSE),                /* pcrel_offset */
366
 
367
  HOWTO (R_MN10300_GOT24,       /* type */
368
         0,                      /* rightshift */
369
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
370
         24,                    /* bitsize */
371
         FALSE,                 /* pc_relative */
372
         0,                      /* bitpos */
373
         complain_overflow_bitfield, /* complain_on_overflow */
374
         bfd_elf_generic_reloc, /* */
375
         "R_MN10300_GOT24",     /* name */
376
         FALSE,                 /* partial_inplace */
377
         0xffffffff,            /* src_mask */
378
         0xffffffff,            /* dst_mask */
379
         FALSE),                /* pcrel_offset */
380
 
381
  HOWTO (R_MN10300_GOT16,       /* type */
382
         0,                      /* rightshift */
383
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
384
         16,                    /* bitsize */
385
         FALSE,                 /* pc_relative */
386
         0,                      /* bitpos */
387
         complain_overflow_bitfield, /* complain_on_overflow */
388
         bfd_elf_generic_reloc, /* */
389
         "R_MN10300_GOT16",     /* name */
390
         FALSE,                 /* partial_inplace */
391
         0xffffffff,            /* src_mask */
392
         0xffffffff,            /* dst_mask */
393
         FALSE),                /* pcrel_offset */
394
 
395
  HOWTO (R_MN10300_COPY,        /* type */
396
         0,                      /* rightshift */
397
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
398
         32,                    /* bitsize */
399
         FALSE,                 /* pc_relative */
400
         0,                      /* bitpos */
401
         complain_overflow_bitfield, /* complain_on_overflow */
402
         bfd_elf_generic_reloc, /* */
403
         "R_MN10300_COPY",              /* name */
404
         FALSE,                 /* partial_inplace */
405
         0xffffffff,            /* src_mask */
406
         0xffffffff,            /* dst_mask */
407
         FALSE),                /* pcrel_offset */
408
 
409
  HOWTO (R_MN10300_GLOB_DAT,    /* type */
410
         0,                      /* rightshift */
411
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
412
         32,                    /* bitsize */
413
         FALSE,                 /* pc_relative */
414
         0,                      /* bitpos */
415
         complain_overflow_bitfield, /* complain_on_overflow */
416
         bfd_elf_generic_reloc, /* */
417
         "R_MN10300_GLOB_DAT",  /* name */
418
         FALSE,                 /* partial_inplace */
419
         0xffffffff,            /* src_mask */
420
         0xffffffff,            /* dst_mask */
421
         FALSE),                /* pcrel_offset */
422
 
423
  HOWTO (R_MN10300_JMP_SLOT,    /* type */
424
         0,                      /* rightshift */
425
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
426
         32,                    /* bitsize */
427
         FALSE,                 /* pc_relative */
428
         0,                      /* bitpos */
429
         complain_overflow_bitfield, /* complain_on_overflow */
430
         bfd_elf_generic_reloc, /* */
431
         "R_MN10300_JMP_SLOT",  /* name */
432
         FALSE,                 /* partial_inplace */
433
         0xffffffff,            /* src_mask */
434
         0xffffffff,            /* dst_mask */
435
         FALSE),                /* pcrel_offset */
436
 
437
  HOWTO (R_MN10300_RELATIVE,    /* type */
438
         0,                      /* rightshift */
439
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
440
         32,                    /* bitsize */
441
         FALSE,                 /* pc_relative */
442
         0,                      /* bitpos */
443
         complain_overflow_bitfield, /* complain_on_overflow */
444
         bfd_elf_generic_reloc, /* */
445
         "R_MN10300_RELATIVE",  /* name */
446
         FALSE,                 /* partial_inplace */
447
         0xffffffff,            /* src_mask */
448
         0xffffffff,            /* dst_mask */
449
         FALSE),                /* pcrel_offset */
450
 
451
  EMPTY_HOWTO (24),
452
  EMPTY_HOWTO (25),
453
  EMPTY_HOWTO (26),
454
  EMPTY_HOWTO (27),
455
  EMPTY_HOWTO (28),
456
  EMPTY_HOWTO (29),
457
  EMPTY_HOWTO (30),
458
  EMPTY_HOWTO (31),
459
  EMPTY_HOWTO (32),
460
 
461
  HOWTO (R_MN10300_SYM_DIFF,    /* type */
462
         0,                      /* rightshift */
463
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
464
         32,                    /* bitsize */
465
         FALSE,                 /* pc_relative */
466
         0,                      /* bitpos */
467
         complain_overflow_dont,/* complain_on_overflow */
468
         NULL,                  /* special handler.  */
469
         "R_MN10300_SYM_DIFF",  /* name */
470
         FALSE,                 /* partial_inplace */
471
         0xffffffff,            /* src_mask */
472
         0xffffffff,            /* dst_mask */
473
         FALSE),                /* pcrel_offset */
474
 
475
  HOWTO (R_MN10300_ALIGN,       /* type */
476
         0,                      /* rightshift */
477
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
478
         32,                    /* bitsize */
479
         FALSE,                 /* pc_relative */
480
         0,                      /* bitpos */
481
         complain_overflow_dont,/* complain_on_overflow */
482
         NULL,                  /* special handler.  */
483
         "R_MN10300_ALIGN",     /* name */
484
         FALSE,                 /* partial_inplace */
485
         0,                      /* src_mask */
486
         0,                      /* dst_mask */
487
         FALSE)                 /* pcrel_offset */
488
};
489
 
490
struct mn10300_reloc_map
491
{
492
  bfd_reloc_code_real_type bfd_reloc_val;
493
  unsigned char elf_reloc_val;
494
};
495
 
496
static const struct mn10300_reloc_map mn10300_reloc_map[] =
497
{
498
  { BFD_RELOC_NONE, R_MN10300_NONE, },
499
  { BFD_RELOC_32, R_MN10300_32, },
500
  { BFD_RELOC_16, R_MN10300_16, },
501
  { BFD_RELOC_8, R_MN10300_8, },
502
  { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
503
  { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
504
  { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
505
  { BFD_RELOC_24, R_MN10300_24, },
506
  { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
507
  { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
508
  { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
509
  { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
510
  { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
511
  { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
512
  { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
513
  { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
514
  { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
515
  { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
516
  { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
517
  { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
518
  { BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
519
  { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
520
  { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
521
  { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
522
  { BFD_RELOC_MN10300_SYM_DIFF, R_MN10300_SYM_DIFF },
523
  { BFD_RELOC_MN10300_ALIGN, R_MN10300_ALIGN }
524
};
525
 
526
/* Create the GOT section.  */
527
 
528
static bfd_boolean
529
_bfd_mn10300_elf_create_got_section (bfd * abfd,
530
                                     struct bfd_link_info * info)
531
{
532
  flagword   flags;
533
  flagword   pltflags;
534
  asection * s;
535
  struct elf_link_hash_entry * h;
536
  const struct elf_backend_data * bed = get_elf_backend_data (abfd);
537
  int ptralign;
538
 
539
  /* This function may be called more than once.  */
540
  if (bfd_get_section_by_name (abfd, ".got") != NULL)
541
    return TRUE;
542
 
543
  switch (bed->s->arch_size)
544
    {
545
    case 32:
546
      ptralign = 2;
547
      break;
548
 
549
    case 64:
550
      ptralign = 3;
551
      break;
552
 
553
    default:
554
      bfd_set_error (bfd_error_bad_value);
555
      return FALSE;
556
    }
557
 
558
  flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
559
           | SEC_LINKER_CREATED);
560
 
561
  pltflags = flags;
562
  pltflags |= SEC_CODE;
563
  if (bed->plt_not_loaded)
564
    pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
565
  if (bed->plt_readonly)
566
    pltflags |= SEC_READONLY;
567
 
568
  s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
569
  if (s == NULL
570
      || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
571
    return FALSE;
572
 
573
  /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
574
     .plt section.  */
575
  if (bed->want_plt_sym)
576
    {
577
      h = _bfd_elf_define_linkage_sym (abfd, info, s,
578
                                       "_PROCEDURE_LINKAGE_TABLE_");
579
      elf_hash_table (info)->hplt = h;
580
      if (h == NULL)
581
        return FALSE;
582
    }
583
 
584
  s = bfd_make_section_with_flags (abfd, ".got", flags);
585
  if (s == NULL
586
      || ! bfd_set_section_alignment (abfd, s, ptralign))
587
    return FALSE;
588
 
589
  if (bed->want_got_plt)
590
    {
591
      s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
592
      if (s == NULL
593
          || ! bfd_set_section_alignment (abfd, s, ptralign))
594
        return FALSE;
595
    }
596
 
597
  /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
598
     (or .got.plt) section.  We don't do this in the linker script
599
     because we don't want to define the symbol if we are not creating
600
     a global offset table.  */
601
  h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
602
  elf_hash_table (info)->hgot = h;
603
  if (h == NULL)
604
    return FALSE;
605
 
606
  /* The first bit of the global offset table is the header.  */
607
  s->size += bed->got_header_size;
608
 
609
  return TRUE;
610
}
611
 
612
static reloc_howto_type *
613
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
614
                                 bfd_reloc_code_real_type code)
615
{
616
  unsigned int i;
617
 
618
  for (i = ARRAY_SIZE (mn10300_reloc_map); i--;)
619
    if (mn10300_reloc_map[i].bfd_reloc_val == code)
620
      return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
621
 
622
  return NULL;
623
}
624
 
625
static reloc_howto_type *
626
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
627
                                 const char *r_name)
628
{
629
  unsigned int i;
630
 
631
  for (i = ARRAY_SIZE (elf_mn10300_howto_table); i--;)
632
    if (elf_mn10300_howto_table[i].name != NULL
633
        && strcasecmp (elf_mn10300_howto_table[i].name, r_name) == 0)
634
      return elf_mn10300_howto_table + i;
635
 
636
  return NULL;
637
}
638
 
639
/* Set the howto pointer for an MN10300 ELF reloc.  */
640
 
641
static void
642
mn10300_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
643
                       arelent *cache_ptr,
644
                       Elf_Internal_Rela *dst)
645
{
646
  unsigned int r_type;
647
 
648
  r_type = ELF32_R_TYPE (dst->r_info);
649
  BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
650
  cache_ptr->howto = elf_mn10300_howto_table + r_type;
651
}
652
 
653
/* Look through the relocs for a section during the first phase.
654
   Since we don't do .gots or .plts, we just need to consider the
655
   virtual table relocs for gc.  */
656
 
657
static bfd_boolean
658
mn10300_elf_check_relocs (bfd *abfd,
659
                          struct bfd_link_info *info,
660
                          asection *sec,
661
                          const Elf_Internal_Rela *relocs)
662
{
663
  bfd_boolean sym_diff_reloc_seen;
664
  Elf_Internal_Shdr *symtab_hdr;
665
  Elf_Internal_Sym * isymbuf = NULL;
666
  struct elf_link_hash_entry **sym_hashes;
667
  const Elf_Internal_Rela *rel;
668
  const Elf_Internal_Rela *rel_end;
669
  bfd *      dynobj;
670
  bfd_vma *  local_got_offsets;
671
  asection * sgot;
672
  asection * srelgot;
673
  asection * sreloc;
674
  bfd_boolean result = FALSE;
675
 
676
  sgot    = NULL;
677
  srelgot = NULL;
678
  sreloc  = NULL;
679
 
680
  if (info->relocatable)
681
    return TRUE;
682
 
683
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
684
  isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
685
  sym_hashes = elf_sym_hashes (abfd);
686
 
687
  dynobj = elf_hash_table (info)->dynobj;
688
  local_got_offsets = elf_local_got_offsets (abfd);
689
  rel_end = relocs + sec->reloc_count;
690
  sym_diff_reloc_seen = FALSE;
691
 
692
  for (rel = relocs; rel < rel_end; rel++)
693
    {
694
      struct elf_link_hash_entry *h;
695
      unsigned long r_symndx;
696
      unsigned int r_type;
697
 
698
      r_symndx = ELF32_R_SYM (rel->r_info);
699
      if (r_symndx < symtab_hdr->sh_info)
700
        h = NULL;
701
      else
702
        {
703
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
704
          while (h->root.type == bfd_link_hash_indirect
705
                 || h->root.type == bfd_link_hash_warning)
706
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
707
        }
708
 
709
      r_type = ELF32_R_TYPE (rel->r_info);
710
 
711
      /* Some relocs require a global offset table.  */
712
      if (dynobj == NULL)
713
        {
714
          switch (r_type)
715
            {
716
            case R_MN10300_GOT32:
717
            case R_MN10300_GOT24:
718
            case R_MN10300_GOT16:
719
            case R_MN10300_GOTOFF32:
720
            case R_MN10300_GOTOFF24:
721
            case R_MN10300_GOTOFF16:
722
            case R_MN10300_GOTPC32:
723
            case R_MN10300_GOTPC16:
724
              elf_hash_table (info)->dynobj = dynobj = abfd;
725
              if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
726
                goto fail;
727
              break;
728
 
729
            default:
730
              break;
731
            }
732
        }
733
 
734
      switch (r_type)
735
        {
736
        /* This relocation describes the C++ object vtable hierarchy.
737
           Reconstruct it for later use during GC.  */
738
        case R_MN10300_GNU_VTINHERIT:
739
          if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
740
            goto fail;
741
          break;
742
 
743
        /* This relocation describes which C++ vtable entries are actually
744
           used.  Record for later use during GC.  */
745
        case R_MN10300_GNU_VTENTRY:
746
          BFD_ASSERT (h != NULL);
747
          if (h != NULL
748
              && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
749
            goto fail;
750
          break;
751
 
752
        case R_MN10300_GOT32:
753
        case R_MN10300_GOT24:
754
        case R_MN10300_GOT16:
755
          /* This symbol requires a global offset table entry.  */
756
 
757
          if (sgot == NULL)
758
            {
759
              sgot = bfd_get_section_by_name (dynobj, ".got");
760
              BFD_ASSERT (sgot != NULL);
761
            }
762
 
763
          if (srelgot == NULL
764
              && (h != NULL || info->shared))
765
            {
766
              srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
767
              if (srelgot == NULL)
768
                {
769
                  srelgot = bfd_make_section_with_flags (dynobj,
770
                                                         ".rela.got",
771
                                                         (SEC_ALLOC
772
                                                          | SEC_LOAD
773
                                                          | SEC_HAS_CONTENTS
774
                                                          | SEC_IN_MEMORY
775
                                                          | SEC_LINKER_CREATED
776
                                                          | SEC_READONLY));
777
                  if (srelgot == NULL
778
                      || ! bfd_set_section_alignment (dynobj, srelgot, 2))
779
                    goto fail;
780
                }
781
            }
782
 
783
          if (h != NULL)
784
            {
785
              if (h->got.offset != (bfd_vma) -1)
786
                /* We have already allocated space in the .got.  */
787
                break;
788
 
789
              h->got.offset = sgot->size;
790
 
791
              /* Make sure this symbol is output as a dynamic symbol.  */
792
              if (h->dynindx == -1)
793
                {
794
                  if (! bfd_elf_link_record_dynamic_symbol (info, h))
795
                    goto fail;
796
                }
797
 
798
              srelgot->size += sizeof (Elf32_External_Rela);
799
            }
800
          else
801
            {
802
              /* This is a global offset table entry for a local
803
                 symbol.  */
804
              if (local_got_offsets == NULL)
805
                {
806
                  size_t       size;
807
                  unsigned int i;
808
 
809
                  size = symtab_hdr->sh_info * sizeof (bfd_vma);
810
                  local_got_offsets = bfd_alloc (abfd, size);
811
 
812
                  if (local_got_offsets == NULL)
813
                    goto fail;
814
 
815
                  elf_local_got_offsets (abfd) = local_got_offsets;
816
 
817
                  for (i = 0; i < symtab_hdr->sh_info; i++)
818
                    local_got_offsets[i] = (bfd_vma) -1;
819
                }
820
 
821
              if (local_got_offsets[r_symndx] != (bfd_vma) -1)
822
                /* We have already allocated space in the .got.  */
823
                break;
824
 
825
              local_got_offsets[r_symndx] = sgot->size;
826
 
827
              if (info->shared)
828
                /* If we are generating a shared object, we need to
829
                   output a R_MN10300_RELATIVE reloc so that the dynamic
830
                   linker can adjust this GOT entry.  */
831
                srelgot->size += sizeof (Elf32_External_Rela);
832
            }
833
 
834
          sgot->size += 4;
835
          break;
836
 
837
        case R_MN10300_PLT32:
838
        case R_MN10300_PLT16:
839
          /* This symbol requires a procedure linkage table entry.  We
840
             actually build the entry in adjust_dynamic_symbol,
841
             because this might be a case of linking PIC code which is
842
             never referenced by a dynamic object, in which case we
843
             don't need to generate a procedure linkage table entry
844
             after all.  */
845
 
846
          /* If this is a local symbol, we resolve it directly without
847
             creating a procedure linkage table entry.  */
848
          if (h == NULL)
849
            continue;
850
 
851
          if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
852
              || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
853
            break;
854
 
855
          h->needs_plt = 1;
856
          break;
857
 
858
        case R_MN10300_24:
859
        case R_MN10300_16:
860
        case R_MN10300_8:
861
        case R_MN10300_PCREL32:
862
        case R_MN10300_PCREL16:
863
        case R_MN10300_PCREL8:
864
          if (h != NULL)
865
            h->non_got_ref = 1;
866
          break;
867
 
868
        case R_MN10300_SYM_DIFF:
869
          sym_diff_reloc_seen = TRUE;
870
          break;
871
 
872
        case R_MN10300_32:
873
          if (h != NULL)
874
            h->non_got_ref = 1;
875
 
876
          /* If we are creating a shared library, then we
877
             need to copy the reloc into the shared library.  */
878
          if (info->shared
879
              && (sec->flags & SEC_ALLOC) != 0
880
              /* Do not generate a dynamic reloc for a
881
                 reloc associated with a SYM_DIFF operation.  */
882
              && ! sym_diff_reloc_seen)
883
            {
884
              asection * sym_section = NULL;
885
 
886
              /* Find the section containing the
887
                 symbol involved in the relocation.  */
888
              if (h == NULL)
889
                {
890
                  Elf_Internal_Sym * isym;
891
 
892
                  if (isymbuf == NULL)
893
                    isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
894
                                                    symtab_hdr->sh_info, 0,
895
                                                    NULL, NULL, NULL);
896
                  if (isymbuf)
897
                    {
898
                      isym = isymbuf + r_symndx;
899
                      /* All we care about is whether this local symbol is absolute.  */
900
                      if (isym->st_shndx == SHN_ABS)
901
                        sym_section = bfd_abs_section_ptr;
902
                    }
903
                }
904
              else
905
                {
906
                  if (h->root.type == bfd_link_hash_defined
907
                      || h->root.type == bfd_link_hash_defweak)
908
                    sym_section = h->root.u.def.section;
909
                }
910
 
911
              /* If the symbol is absolute then the relocation can
912
                 be resolved during linking and there is no need for
913
                 a dynamic reloc.  */
914
              if (sym_section != bfd_abs_section_ptr)
915
                {
916
                  /* When creating a shared object, we must copy these
917
                     reloc types into the output file.  We create a reloc
918
                     section in dynobj and make room for this reloc.  */
919
                  if (sreloc == NULL)
920
                    {
921
                      sreloc = _bfd_elf_make_dynamic_reloc_section
922
                        (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
923
                      if (sreloc == NULL)
924
                        goto fail;
925
                    }
926
 
927
                  sreloc->size += sizeof (Elf32_External_Rela);
928
                }
929
            }
930
 
931
          break;
932
        }
933
 
934
      if (ELF32_R_TYPE (rel->r_info) != R_MN10300_SYM_DIFF)
935
        sym_diff_reloc_seen = FALSE;
936
    }
937
 
938
  result = TRUE;
939
 fail:
940
  if (isymbuf != NULL)
941
    free (isymbuf);
942
 
943
  return result;
944
}
945
 
946
/* Return the section that should be marked against GC for a given
947
   relocation.  */
948
 
949
static asection *
950
mn10300_elf_gc_mark_hook (asection *sec,
951
                          struct bfd_link_info *info,
952
                          Elf_Internal_Rela *rel,
953
                          struct elf_link_hash_entry *h,
954
                          Elf_Internal_Sym *sym)
955
{
956
  if (h != NULL)
957
    switch (ELF32_R_TYPE (rel->r_info))
958
      {
959
      case R_MN10300_GNU_VTINHERIT:
960
      case R_MN10300_GNU_VTENTRY:
961
        return NULL;
962
      }
963
 
964
  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
965
}
966
 
967
/* Perform a relocation as part of a final link.  */
968
 
969
static bfd_reloc_status_type
970
mn10300_elf_final_link_relocate (reloc_howto_type *howto,
971
                                 bfd *input_bfd,
972
                                 bfd *output_bfd ATTRIBUTE_UNUSED,
973
                                 asection *input_section,
974
                                 bfd_byte *contents,
975
                                 bfd_vma offset,
976
                                 bfd_vma value,
977
                                 bfd_vma addend,
978
                                 struct elf_link_hash_entry * h,
979
                                 unsigned long symndx,
980
                                 struct bfd_link_info *info,
981
                                 asection *sym_sec ATTRIBUTE_UNUSED,
982
                                 int is_local ATTRIBUTE_UNUSED)
983
{
984
  static asection *  sym_diff_section;
985
  static bfd_vma     sym_diff_value;
986
  bfd_boolean is_sym_diff_reloc;
987
  unsigned long r_type = howto->type;
988
  bfd_byte * hit_data = contents + offset;
989
  bfd *      dynobj;
990
  asection * sgot;
991
  asection * splt;
992
  asection * sreloc;
993
 
994
  dynobj = elf_hash_table (info)->dynobj;
995
  sgot   = NULL;
996
  splt   = NULL;
997
  sreloc = NULL;
998
 
999
  switch (r_type)
1000
    {
1001
    case R_MN10300_24:
1002
    case R_MN10300_16:
1003
    case R_MN10300_8:
1004
    case R_MN10300_PCREL8:
1005
    case R_MN10300_PCREL16:
1006
    case R_MN10300_PCREL32:
1007
    case R_MN10300_GOTOFF32:
1008
    case R_MN10300_GOTOFF24:
1009
    case R_MN10300_GOTOFF16:
1010
      if (info->shared
1011
          && (input_section->flags & SEC_ALLOC) != 0
1012
          && h != NULL
1013
          && ! SYMBOL_REFERENCES_LOCAL (info, h))
1014
        return bfd_reloc_dangerous;
1015
    }
1016
 
1017
  is_sym_diff_reloc = FALSE;
1018
  if (sym_diff_section != NULL)
1019
    {
1020
      BFD_ASSERT (sym_diff_section == input_section);
1021
 
1022
      switch (r_type)
1023
        {
1024
        case R_MN10300_32:
1025
        case R_MN10300_24:
1026
        case R_MN10300_16:
1027
        case R_MN10300_8:
1028
          value -= sym_diff_value;
1029
          /* If we are computing a 32-bit value for the location lists
1030
             and the result is 0 then we add one to the value.  A zero
1031
             value can result because of linker relaxation deleteing
1032
             prologue instructions and using a value of 1 (for the begin
1033
             and end offsets in the location list entry) results in a
1034
             nul entry which does not prevent the following entries from
1035
             being parsed.  */
1036
          if (r_type == R_MN10300_32
1037
              && value == 0
1038
              && strcmp (input_section->name, ".debug_loc") == 0)
1039
            value = 1;
1040
          sym_diff_section = NULL;
1041
          is_sym_diff_reloc = TRUE;
1042
          break;
1043
 
1044
        default:
1045
          sym_diff_section = NULL;
1046
          break;
1047
        }
1048
    }
1049
 
1050
  switch (r_type)
1051
    {
1052
    case R_MN10300_SYM_DIFF:
1053
      BFD_ASSERT (addend == 0);
1054
      /* Cache the input section and value.
1055
         The offset is unreliable, since relaxation may
1056
         have reduced the following reloc's offset.  */
1057
      sym_diff_section = input_section;
1058
      sym_diff_value = value;
1059
      return bfd_reloc_ok;
1060
 
1061
    case R_MN10300_ALIGN:
1062
    case R_MN10300_NONE:
1063
      return bfd_reloc_ok;
1064
 
1065
    case R_MN10300_32:
1066
      if (info->shared
1067
          /* Do not generate relocs when an R_MN10300_32 has been used
1068
             with an R_MN10300_SYM_DIFF to compute a difference of two
1069
             symbols.  */
1070
          && is_sym_diff_reloc == FALSE
1071
          /* Also, do not generate a reloc when the symbol associated
1072
             with the R_MN10300_32 reloc is absolute - there is no
1073
             need for a run time computation in this case.  */
1074
          && sym_sec != bfd_abs_section_ptr
1075
          /* If the section is not going to be allocated at load time
1076
             then there is no need to generate relocs for it.  */
1077
          && (input_section->flags & SEC_ALLOC) != 0)
1078
        {
1079
          Elf_Internal_Rela outrel;
1080
          bfd_boolean skip, relocate;
1081
 
1082
          /* When generating a shared object, these relocations are
1083
             copied into the output file to be resolved at run
1084
             time.  */
1085
          if (sreloc == NULL)
1086
            {
1087
              sreloc = _bfd_elf_get_dynamic_reloc_section
1088
                (input_bfd, input_section, /*rela?*/ TRUE);
1089
              if (sreloc == NULL)
1090
                return FALSE;
1091
            }
1092
 
1093
          skip = FALSE;
1094
 
1095
          outrel.r_offset = _bfd_elf_section_offset (input_bfd, info,
1096
                                                     input_section, offset);
1097
          if (outrel.r_offset == (bfd_vma) -1)
1098
            skip = TRUE;
1099
 
1100
          outrel.r_offset += (input_section->output_section->vma
1101
                              + input_section->output_offset);
1102
 
1103
          if (skip)
1104
            {
1105
              memset (&outrel, 0, sizeof outrel);
1106
              relocate = FALSE;
1107
            }
1108
          else
1109
            {
1110
              /* h->dynindx may be -1 if this symbol was marked to
1111
                 become local.  */
1112
              if (h == NULL
1113
                  || SYMBOL_REFERENCES_LOCAL (info, h))
1114
                {
1115
                  relocate = TRUE;
1116
                  outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1117
                  outrel.r_addend = value + addend;
1118
                }
1119
              else
1120
                {
1121
                  BFD_ASSERT (h->dynindx != -1);
1122
                  relocate = FALSE;
1123
                  outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
1124
                  outrel.r_addend = value + addend;
1125
                }
1126
            }
1127
 
1128
          bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1129
                                     (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
1130
                                                   + sreloc->reloc_count));
1131
          ++sreloc->reloc_count;
1132
 
1133
          /* If this reloc is against an external symbol, we do
1134
             not want to fiddle with the addend.  Otherwise, we
1135
             need to include the symbol value so that it becomes
1136
             an addend for the dynamic reloc.  */
1137
          if (! relocate)
1138
            return bfd_reloc_ok;
1139
        }
1140
      value += addend;
1141
      bfd_put_32 (input_bfd, value, hit_data);
1142
      return bfd_reloc_ok;
1143
 
1144
    case R_MN10300_24:
1145
      value += addend;
1146
 
1147
      if ((long) value > 0x7fffff || (long) value < -0x800000)
1148
        return bfd_reloc_overflow;
1149
 
1150
      bfd_put_8 (input_bfd, value & 0xff, hit_data);
1151
      bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1152
      bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1153
      return bfd_reloc_ok;
1154
 
1155
    case R_MN10300_16:
1156
      value += addend;
1157
 
1158
      if ((long) value > 0x7fff || (long) value < -0x8000)
1159
        return bfd_reloc_overflow;
1160
 
1161
      bfd_put_16 (input_bfd, value, hit_data);
1162
      return bfd_reloc_ok;
1163
 
1164
    case R_MN10300_8:
1165
      value += addend;
1166
 
1167
      if ((long) value > 0x7f || (long) value < -0x80)
1168
        return bfd_reloc_overflow;
1169
 
1170
      bfd_put_8 (input_bfd, value, hit_data);
1171
      return bfd_reloc_ok;
1172
 
1173
    case R_MN10300_PCREL8:
1174
      value -= (input_section->output_section->vma
1175
                + input_section->output_offset);
1176
      value -= offset;
1177
      value += addend;
1178
 
1179
      if ((long) value > 0x7f || (long) value < -0x80)
1180
        return bfd_reloc_overflow;
1181
 
1182
      bfd_put_8 (input_bfd, value, hit_data);
1183
      return bfd_reloc_ok;
1184
 
1185
    case R_MN10300_PCREL16:
1186
      value -= (input_section->output_section->vma
1187
                + input_section->output_offset);
1188
      value -= offset;
1189
      value += addend;
1190
 
1191
      if ((long) value > 0x7fff || (long) value < -0x8000)
1192
        return bfd_reloc_overflow;
1193
 
1194
      bfd_put_16 (input_bfd, value, hit_data);
1195
      return bfd_reloc_ok;
1196
 
1197
    case R_MN10300_PCREL32:
1198
      value -= (input_section->output_section->vma
1199
                + input_section->output_offset);
1200
      value -= offset;
1201
      value += addend;
1202
 
1203
      bfd_put_32 (input_bfd, value, hit_data);
1204
      return bfd_reloc_ok;
1205
 
1206
    case R_MN10300_GNU_VTINHERIT:
1207
    case R_MN10300_GNU_VTENTRY:
1208
      return bfd_reloc_ok;
1209
 
1210
    case R_MN10300_GOTPC32:
1211
      /* Use global offset table as symbol value.  */
1212
      value = bfd_get_section_by_name (dynobj,
1213
                                       ".got")->output_section->vma;
1214
      value -= (input_section->output_section->vma
1215
                + input_section->output_offset);
1216
      value -= offset;
1217
      value += addend;
1218
 
1219
      bfd_put_32 (input_bfd, value, hit_data);
1220
      return bfd_reloc_ok;
1221
 
1222
    case R_MN10300_GOTPC16:
1223
      /* Use global offset table as symbol value.  */
1224
      value = bfd_get_section_by_name (dynobj,
1225
                                       ".got")->output_section->vma;
1226
      value -= (input_section->output_section->vma
1227
                + input_section->output_offset);
1228
      value -= offset;
1229
      value += addend;
1230
 
1231
      if ((long) value > 0x7fff || (long) value < -0x8000)
1232
        return bfd_reloc_overflow;
1233
 
1234
      bfd_put_16 (input_bfd, value, hit_data);
1235
      return bfd_reloc_ok;
1236
 
1237
    case R_MN10300_GOTOFF32:
1238
      value -= bfd_get_section_by_name (dynobj,
1239
                                        ".got")->output_section->vma;
1240
      value += addend;
1241
 
1242
      bfd_put_32 (input_bfd, value, hit_data);
1243
      return bfd_reloc_ok;
1244
 
1245
    case R_MN10300_GOTOFF24:
1246
      value -= bfd_get_section_by_name (dynobj,
1247
                                        ".got")->output_section->vma;
1248
      value += addend;
1249
 
1250
      if ((long) value > 0x7fffff || (long) value < -0x800000)
1251
        return bfd_reloc_overflow;
1252
 
1253
      bfd_put_8 (input_bfd, value, hit_data);
1254
      bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1255
      bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1256
      return bfd_reloc_ok;
1257
 
1258
    case R_MN10300_GOTOFF16:
1259
      value -= bfd_get_section_by_name (dynobj,
1260
                                        ".got")->output_section->vma;
1261
      value += addend;
1262
 
1263
      if ((long) value > 0x7fff || (long) value < -0x8000)
1264
        return bfd_reloc_overflow;
1265
 
1266
      bfd_put_16 (input_bfd, value, hit_data);
1267
      return bfd_reloc_ok;
1268
 
1269
    case R_MN10300_PLT32:
1270
      if (h != NULL
1271
          && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1272
          && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1273
          && h->plt.offset != (bfd_vma) -1)
1274
        {
1275
          splt = bfd_get_section_by_name (dynobj, ".plt");
1276
 
1277
          value = (splt->output_section->vma
1278
                   + splt->output_offset
1279
                   + h->plt.offset) - value;
1280
        }
1281
 
1282
      value -= (input_section->output_section->vma
1283
                + input_section->output_offset);
1284
      value -= offset;
1285
      value += addend;
1286
 
1287
      bfd_put_32 (input_bfd, value, hit_data);
1288
      return bfd_reloc_ok;
1289
 
1290
    case R_MN10300_PLT16:
1291
      if (h != NULL
1292
          && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1293
          && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1294
          && h->plt.offset != (bfd_vma) -1)
1295
        {
1296
          splt = bfd_get_section_by_name (dynobj, ".plt");
1297
 
1298
          value = (splt->output_section->vma
1299
                   + splt->output_offset
1300
                   + h->plt.offset) - value;
1301
        }
1302
 
1303
      value -= (input_section->output_section->vma
1304
                + input_section->output_offset);
1305
      value -= offset;
1306
      value += addend;
1307
 
1308
      if ((long) value > 0x7fff || (long) value < -0x8000)
1309
        return bfd_reloc_overflow;
1310
 
1311
      bfd_put_16 (input_bfd, value, hit_data);
1312
      return bfd_reloc_ok;
1313
 
1314
    case R_MN10300_GOT32:
1315
    case R_MN10300_GOT24:
1316
    case R_MN10300_GOT16:
1317
      {
1318
        sgot = bfd_get_section_by_name (dynobj, ".got");
1319
 
1320
          if (h != NULL)
1321
            {
1322
              bfd_vma off;
1323
 
1324
              off = h->got.offset;
1325
              BFD_ASSERT (off != (bfd_vma) -1);
1326
 
1327
              if (! elf_hash_table (info)->dynamic_sections_created
1328
                  || SYMBOL_REFERENCES_LOCAL (info, h))
1329
                /* This is actually a static link, or it is a
1330
                   -Bsymbolic link and the symbol is defined
1331
                   locally, or the symbol was forced to be local
1332
                   because of a version file.  We must initialize
1333
                   this entry in the global offset table.
1334
 
1335
                   When doing a dynamic link, we create a .rela.got
1336
                   relocation entry to initialize the value.  This
1337
                   is done in the finish_dynamic_symbol routine.  */
1338
                bfd_put_32 (output_bfd, value,
1339
                            sgot->contents + off);
1340
 
1341
              value = sgot->output_offset + off;
1342
            }
1343
          else
1344
            {
1345
              bfd_vma off;
1346
 
1347
              off = elf_local_got_offsets (input_bfd)[symndx];
1348
 
1349
              bfd_put_32 (output_bfd, value, sgot->contents + off);
1350
 
1351
              if (info->shared)
1352
                {
1353
                  asection * srelgot;
1354
                  Elf_Internal_Rela outrel;
1355
 
1356
                  srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1357
                  BFD_ASSERT (srelgot != NULL);
1358
 
1359
                  outrel.r_offset = (sgot->output_section->vma
1360
                                     + sgot->output_offset
1361
                                     + off);
1362
                  outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1363
                  outrel.r_addend = value;
1364
                  bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1365
                                             (bfd_byte *) (((Elf32_External_Rela *)
1366
                                                            srelgot->contents)
1367
                                                           + srelgot->reloc_count));
1368
                  ++ srelgot->reloc_count;
1369
                }
1370
 
1371
              value = sgot->output_offset + off;
1372
            }
1373
      }
1374
 
1375
      value += addend;
1376
 
1377
      if (r_type == R_MN10300_GOT32)
1378
        {
1379
          bfd_put_32 (input_bfd, value, hit_data);
1380
          return bfd_reloc_ok;
1381
        }
1382
      else if (r_type == R_MN10300_GOT24)
1383
        {
1384
          if ((long) value > 0x7fffff || (long) value < -0x800000)
1385
            return bfd_reloc_overflow;
1386
 
1387
          bfd_put_8 (input_bfd, value & 0xff, hit_data);
1388
          bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1389
          bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1390
          return bfd_reloc_ok;
1391
        }
1392
      else if (r_type == R_MN10300_GOT16)
1393
        {
1394
          if ((long) value > 0x7fff || (long) value < -0x8000)
1395
            return bfd_reloc_overflow;
1396
 
1397
          bfd_put_16 (input_bfd, value, hit_data);
1398
          return bfd_reloc_ok;
1399
        }
1400
      /* Fall through.  */
1401
 
1402
    default:
1403
      return bfd_reloc_notsupported;
1404
    }
1405
}
1406
 
1407
/* Relocate an MN10300 ELF section.  */
1408
 
1409
static bfd_boolean
1410
mn10300_elf_relocate_section (bfd *output_bfd,
1411
                              struct bfd_link_info *info,
1412
                              bfd *input_bfd,
1413
                              asection *input_section,
1414
                              bfd_byte *contents,
1415
                              Elf_Internal_Rela *relocs,
1416
                              Elf_Internal_Sym *local_syms,
1417
                              asection **local_sections)
1418
{
1419
  Elf_Internal_Shdr *symtab_hdr;
1420
  struct elf_link_hash_entry **sym_hashes;
1421
  Elf_Internal_Rela *rel, *relend;
1422
 
1423
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1424
  sym_hashes = elf_sym_hashes (input_bfd);
1425
 
1426
  rel = relocs;
1427
  relend = relocs + input_section->reloc_count;
1428
  for (; rel < relend; rel++)
1429
    {
1430
      int r_type;
1431
      reloc_howto_type *howto;
1432
      unsigned long r_symndx;
1433
      Elf_Internal_Sym *sym;
1434
      asection *sec;
1435
      struct elf32_mn10300_link_hash_entry *h;
1436
      bfd_vma relocation;
1437
      bfd_reloc_status_type r;
1438
 
1439
      r_symndx = ELF32_R_SYM (rel->r_info);
1440
      r_type = ELF32_R_TYPE (rel->r_info);
1441
      howto = elf_mn10300_howto_table + r_type;
1442
 
1443
      /* Just skip the vtable gc relocs.  */
1444
      if (r_type == R_MN10300_GNU_VTINHERIT
1445
          || r_type == R_MN10300_GNU_VTENTRY)
1446
        continue;
1447
 
1448
      h = NULL;
1449
      sym = NULL;
1450
      sec = NULL;
1451
      if (r_symndx < symtab_hdr->sh_info)
1452
        {
1453
          sym = local_syms + r_symndx;
1454
          sec = local_sections[r_symndx];
1455
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1456
        }
1457
      else
1458
        {
1459
          bfd_boolean unresolved_reloc;
1460
          bfd_boolean warned;
1461
          struct elf_link_hash_entry *hh;
1462
 
1463
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1464
                                   r_symndx, symtab_hdr, sym_hashes,
1465
                                   hh, sec, relocation,
1466
                                   unresolved_reloc, warned);
1467
 
1468
          h = (struct elf32_mn10300_link_hash_entry *) hh;
1469
 
1470
          if ((h->root.root.type == bfd_link_hash_defined
1471
              || h->root.root.type == bfd_link_hash_defweak)
1472
              && (   r_type == R_MN10300_GOTPC32
1473
                  || r_type == R_MN10300_GOTPC16
1474
                  || ((   r_type == R_MN10300_PLT32
1475
                       || r_type == R_MN10300_PLT16)
1476
                      && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
1477
                      && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
1478
                      && h->root.plt.offset != (bfd_vma) -1)
1479
                  || ((   r_type == R_MN10300_GOT32
1480
                       || r_type == R_MN10300_GOT24
1481
                       || r_type == R_MN10300_GOT16)
1482
                      && elf_hash_table (info)->dynamic_sections_created
1483
                      && !SYMBOL_REFERENCES_LOCAL (info, hh))
1484
                  || (r_type == R_MN10300_32
1485
                      /* _32 relocs in executables force _COPY relocs,
1486
                         such that the address of the symbol ends up
1487
                         being local.  */
1488
                      && !info->executable
1489
                      && !SYMBOL_REFERENCES_LOCAL (info, hh)
1490
                      && ((input_section->flags & SEC_ALLOC) != 0
1491
                          /* DWARF will emit R_MN10300_32 relocations
1492
                             in its sections against symbols defined
1493
                             externally in shared libraries.  We can't
1494
                             do anything with them here.  */
1495
                          || ((input_section->flags & SEC_DEBUGGING) != 0
1496
                              && h->root.def_dynamic)))))
1497
            /* In these cases, we don't need the relocation
1498
               value.  We check specially because in some
1499
               obscure cases sec->output_section will be NULL.  */
1500
            relocation = 0;
1501
 
1502 163 khays
          else if (!info->relocatable && unresolved_reloc
1503
                   && _bfd_elf_section_offset (output_bfd, info, input_section,
1504
                                               rel->r_offset) != (bfd_vma) -1)
1505
 
1506 14 khays
            (*_bfd_error_handler)
1507
              (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
1508
               input_bfd,
1509
               input_section,
1510
               (long) rel->r_offset,
1511
               howto->name,
1512
               h->root.root.root.string);
1513
        }
1514
 
1515
      if (sec != NULL && elf_discarded_section (sec))
1516
        RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1517
                                         rel, relend, howto, contents);
1518
 
1519
      if (info->relocatable)
1520
        continue;
1521
 
1522
      r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1523
                                           input_section,
1524
                                           contents, rel->r_offset,
1525
                                           relocation, rel->r_addend,
1526
                                           (struct elf_link_hash_entry *) h,
1527
                                           r_symndx,
1528
                                           info, sec, h == NULL);
1529
 
1530
      if (r != bfd_reloc_ok)
1531
        {
1532
          const char *name;
1533
          const char *msg = NULL;
1534
 
1535
          if (h != NULL)
1536
            name = h->root.root.root.string;
1537
          else
1538
            {
1539
              name = (bfd_elf_string_from_elf_section
1540
                      (input_bfd, symtab_hdr->sh_link, sym->st_name));
1541
              if (name == NULL || *name == '\0')
1542
                name = bfd_section_name (input_bfd, sec);
1543
            }
1544
 
1545
          switch (r)
1546
            {
1547
            case bfd_reloc_overflow:
1548
              if (! ((*info->callbacks->reloc_overflow)
1549
                     (info, (h ? &h->root.root : NULL), name,
1550
                      howto->name, (bfd_vma) 0, input_bfd,
1551
                      input_section, rel->r_offset)))
1552
                return FALSE;
1553
              break;
1554
 
1555
            case bfd_reloc_undefined:
1556
              if (! ((*info->callbacks->undefined_symbol)
1557
                     (info, name, input_bfd, input_section,
1558
                      rel->r_offset, TRUE)))
1559
                return FALSE;
1560
              break;
1561
 
1562
            case bfd_reloc_outofrange:
1563
              msg = _("internal error: out of range error");
1564
              goto common_error;
1565
 
1566
            case bfd_reloc_notsupported:
1567
              msg = _("internal error: unsupported relocation error");
1568
              goto common_error;
1569
 
1570
            case bfd_reloc_dangerous:
1571
              if (r_type == R_MN10300_PCREL32)
1572
                msg = _("error: inappropriate relocation type for shared"
1573
                        " library (did you forget -fpic?)");
1574
              else
1575
                msg = _("internal error: suspicious relocation type used"
1576
                        " in shared library");
1577
              goto common_error;
1578
 
1579
            default:
1580
              msg = _("internal error: unknown error");
1581
              /* Fall through.  */
1582
 
1583
            common_error:
1584
              if (!((*info->callbacks->warning)
1585
                    (info, msg, name, input_bfd, input_section,
1586
                     rel->r_offset)))
1587
                return FALSE;
1588
              break;
1589
            }
1590
        }
1591
    }
1592
 
1593
  return TRUE;
1594
}
1595
 
1596
/* Finish initializing one hash table entry.  */
1597
 
1598
static bfd_boolean
1599
elf32_mn10300_finish_hash_table_entry (struct bfd_hash_entry *gen_entry,
1600
                                       void * in_args)
1601
{
1602
  struct elf32_mn10300_link_hash_entry *entry;
1603
  struct bfd_link_info *link_info = (struct bfd_link_info *) in_args;
1604
  unsigned int byte_count = 0;
1605
 
1606
  entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
1607
 
1608
  /* If we already know we want to convert "call" to "calls" for calls
1609
     to this symbol, then return now.  */
1610
  if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
1611
    return TRUE;
1612
 
1613
  /* If there are no named calls to this symbol, or there's nothing we
1614
     can move from the function itself into the "call" instruction,
1615
     then note that all "call" instructions should be converted into
1616
     "calls" instructions and return.  If a symbol is available for
1617
     dynamic symbol resolution (overridable or overriding), avoid
1618
     custom calling conventions.  */
1619
  if (entry->direct_calls == 0
1620
      || (entry->stack_size == 0 && entry->movm_args == 0)
1621
      || (elf_hash_table (link_info)->dynamic_sections_created
1622
          && ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL
1623
          && ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN))
1624
    {
1625
      /* Make a note that we should convert "call" instructions to "calls"
1626
         instructions for calls to this symbol.  */
1627
      entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1628
      return TRUE;
1629
    }
1630
 
1631
  /* We may be able to move some instructions from the function itself into
1632
     the "call" instruction.  Count how many bytes we might be able to
1633
     eliminate in the function itself.  */
1634
 
1635
  /* A movm instruction is two bytes.  */
1636
  if (entry->movm_args)
1637
    byte_count += 2;
1638
 
1639
  /* Count the insn to allocate stack space too.  */
1640
  if (entry->stack_size > 0)
1641
    {
1642
      if (entry->stack_size <= 128)
1643
        byte_count += 3;
1644
      else
1645
        byte_count += 4;
1646
    }
1647
 
1648
  /* If using "call" will result in larger code, then turn all
1649
     the associated "call" instructions into "calls" instructions.  */
1650
  if (byte_count < entry->direct_calls)
1651
    entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1652
 
1653
  /* This routine never fails.  */
1654
  return TRUE;
1655
}
1656
 
1657
/* Used to count hash table entries.  */
1658
 
1659
static bfd_boolean
1660
elf32_mn10300_count_hash_table_entries (struct bfd_hash_entry *gen_entry ATTRIBUTE_UNUSED,
1661
                                        void * in_args)
1662
{
1663
  int *count = (int *) in_args;
1664
 
1665
  (*count) ++;
1666
  return TRUE;
1667
}
1668
 
1669
/* Used to enumerate hash table entries into a linear array.  */
1670
 
1671
static bfd_boolean
1672
elf32_mn10300_list_hash_table_entries (struct bfd_hash_entry *gen_entry,
1673
                                       void * in_args)
1674
{
1675
  struct bfd_hash_entry ***ptr = (struct bfd_hash_entry ***) in_args;
1676
 
1677
  **ptr = gen_entry;
1678
  (*ptr) ++;
1679
  return TRUE;
1680
}
1681
 
1682
/* Used to sort the array created by the above.  */
1683
 
1684
static int
1685
sort_by_value (const void *va, const void *vb)
1686
{
1687
  struct elf32_mn10300_link_hash_entry *a
1688
    = *(struct elf32_mn10300_link_hash_entry **) va;
1689
  struct elf32_mn10300_link_hash_entry *b
1690
    = *(struct elf32_mn10300_link_hash_entry **) vb;
1691
 
1692
  return a->value - b->value;
1693
}
1694
 
1695
/* Compute the stack size and movm arguments for the function
1696
   referred to by HASH at address ADDR in section with
1697
   contents CONTENTS, store the information in the hash table.  */
1698
 
1699
static void
1700
compute_function_info (bfd *abfd,
1701
                       struct elf32_mn10300_link_hash_entry *hash,
1702
                       bfd_vma addr,
1703
                       unsigned char *contents)
1704
{
1705
  unsigned char byte1, byte2;
1706
  /* We only care about a very small subset of the possible prologue
1707
     sequences here.  Basically we look for:
1708
 
1709
     movm [d2,d3,a2,a3],sp (optional)
1710
     add <size>,sp (optional, and only for sizes which fit in an unsigned
1711
                    8 bit number)
1712
 
1713
     If we find anything else, we quit.  */
1714
 
1715
  /* Look for movm [regs],sp.  */
1716
  byte1 = bfd_get_8 (abfd, contents + addr);
1717
  byte2 = bfd_get_8 (abfd, contents + addr + 1);
1718
 
1719
  if (byte1 == 0xcf)
1720
    {
1721
      hash->movm_args = byte2;
1722
      addr += 2;
1723
      byte1 = bfd_get_8 (abfd, contents + addr);
1724
      byte2 = bfd_get_8 (abfd, contents + addr + 1);
1725
    }
1726
 
1727
  /* Now figure out how much stack space will be allocated by the movm
1728
     instruction.  We need this kept separate from the function's normal
1729
     stack space.  */
1730
  if (hash->movm_args)
1731
    {
1732
      /* Space for d2.  */
1733
      if (hash->movm_args & 0x80)
1734
        hash->movm_stack_size += 4;
1735
 
1736
      /* Space for d3.  */
1737
      if (hash->movm_args & 0x40)
1738
        hash->movm_stack_size += 4;
1739
 
1740
      /* Space for a2.  */
1741
      if (hash->movm_args & 0x20)
1742
        hash->movm_stack_size += 4;
1743
 
1744
      /* Space for a3.  */
1745
      if (hash->movm_args & 0x10)
1746
        hash->movm_stack_size += 4;
1747
 
1748
      /* "other" space.  d0, d1, a0, a1, mdr, lir, lar, 4 byte pad.  */
1749
      if (hash->movm_args & 0x08)
1750
        hash->movm_stack_size += 8 * 4;
1751
 
1752
      if (bfd_get_mach (abfd) == bfd_mach_am33
1753
          || bfd_get_mach (abfd) == bfd_mach_am33_2)
1754
        {
1755
          /* "exother" space.  e0, e1, mdrq, mcrh, mcrl, mcvf */
1756
          if (hash->movm_args & 0x1)
1757
            hash->movm_stack_size += 6 * 4;
1758
 
1759
          /* exreg1 space.  e4, e5, e6, e7 */
1760
          if (hash->movm_args & 0x2)
1761
            hash->movm_stack_size += 4 * 4;
1762
 
1763
          /* exreg0 space.  e2, e3  */
1764
          if (hash->movm_args & 0x4)
1765
            hash->movm_stack_size += 2 * 4;
1766
        }
1767
    }
1768
 
1769
  /* Now look for the two stack adjustment variants.  */
1770
  if (byte1 == 0xf8 && byte2 == 0xfe)
1771
    {
1772
      int temp = bfd_get_8 (abfd, contents + addr + 2);
1773
      temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
1774
 
1775
      hash->stack_size = -temp;
1776
    }
1777
  else if (byte1 == 0xfa && byte2 == 0xfe)
1778
    {
1779
      int temp = bfd_get_16 (abfd, contents + addr + 2);
1780
      temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
1781
      temp = -temp;
1782
 
1783
      if (temp < 255)
1784
        hash->stack_size = temp;
1785
    }
1786
 
1787
  /* If the total stack to be allocated by the call instruction is more
1788
     than 255 bytes, then we can't remove the stack adjustment by using
1789
     "call" (we might still be able to remove the "movm" instruction.  */
1790
  if (hash->stack_size + hash->movm_stack_size > 255)
1791
    hash->stack_size = 0;
1792
}
1793
 
1794
/* Delete some bytes from a section while relaxing.  */
1795
 
1796
static bfd_boolean
1797
mn10300_elf_relax_delete_bytes (bfd *abfd,
1798
                                asection *sec,
1799
                                bfd_vma addr,
1800
                                int count)
1801
{
1802
  Elf_Internal_Shdr *symtab_hdr;
1803
  unsigned int sec_shndx;
1804
  bfd_byte *contents;
1805
  Elf_Internal_Rela *irel, *irelend;
1806
  Elf_Internal_Rela *irelalign;
1807
  bfd_vma toaddr;
1808
  Elf_Internal_Sym *isym, *isymend;
1809
  struct elf_link_hash_entry **sym_hashes;
1810
  struct elf_link_hash_entry **end_hashes;
1811
  unsigned int symcount;
1812
 
1813
  sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1814
 
1815
  contents = elf_section_data (sec)->this_hdr.contents;
1816
 
1817
  irelalign = NULL;
1818
  toaddr = sec->size;
1819
 
1820
  irel = elf_section_data (sec)->relocs;
1821
  irelend = irel + sec->reloc_count;
1822
 
1823
  if (sec->reloc_count > 0)
1824
    {
1825
      /* If there is an align reloc at the end of the section ignore it.
1826
         GAS creates these relocs for reasons of its own, and they just
1827
         serve to keep the section artifically inflated.  */
1828
      if (ELF32_R_TYPE ((irelend - 1)->r_info) == (int) R_MN10300_ALIGN)
1829
        --irelend;
1830
 
1831
      /* The deletion must stop at the next ALIGN reloc for an aligment
1832
         power larger than, or not a multiple of, the number of bytes we
1833
         are deleting.  */
1834
      for (; irel < irelend; irel++)
1835
        {
1836
          int alignment = 1 << irel->r_addend;
1837
 
1838
          if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN
1839
              && irel->r_offset > addr
1840
              && irel->r_offset < toaddr
1841
              && (count < alignment
1842
                  || alignment % count != 0))
1843
            {
1844
              irelalign = irel;
1845
              toaddr = irel->r_offset;
1846
              break;
1847
            }
1848
        }
1849
    }
1850
 
1851
  /* Actually delete the bytes.  */
1852
  memmove (contents + addr, contents + addr + count,
1853
           (size_t) (toaddr - addr - count));
1854
 
1855
  /* Adjust the section's size if we are shrinking it, or else
1856
     pad the bytes between the end of the shrunken region and
1857
     the start of the next region with NOP codes.  */
1858
  if (irelalign == NULL)
1859
    {
1860
      sec->size -= count;
1861
      /* Include symbols at the end of the section, but
1862
         not at the end of a sub-region of the section.  */
1863
      toaddr ++;
1864
    }
1865
  else
1866
    {
1867
      int i;
1868
 
1869
#define NOP_OPCODE 0xcb
1870
 
1871
      for (i = 0; i < count; i ++)
1872
        bfd_put_8 (abfd, (bfd_vma) NOP_OPCODE, contents + toaddr - count + i);
1873
    }
1874
 
1875
  /* Adjust all the relocs.  */
1876
  for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1877
    {
1878
      /* Get the new reloc address.  */
1879
      if ((irel->r_offset > addr
1880
           && irel->r_offset < toaddr)
1881
          || (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN
1882
              && irel->r_offset == toaddr))
1883
        irel->r_offset -= count;
1884
    }
1885
 
1886
  /* Adjust the local symbols in the section, reducing their value
1887
     by the number of bytes deleted.  Note - symbols within the deleted
1888
     region are moved to the address of the start of the region, which
1889
     actually means that they will address the byte beyond the end of
1890
     the region once the deletion has been completed.  */
1891
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1892
  isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1893
  for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1894
    {
1895
      if (isym->st_shndx == sec_shndx
1896
          && isym->st_value > addr
1897
          && isym->st_value < toaddr)
1898
        {
1899
          if (isym->st_value < addr + count)
1900
            isym->st_value = addr;
1901
          else
1902
            isym->st_value -= count;
1903
        }
1904
      /* Adjust the function symbol's size as well.  */
1905
      else if (isym->st_shndx == sec_shndx
1906
               && ELF_ST_TYPE (isym->st_info) == STT_FUNC
1907
               && isym->st_value + isym->st_size > addr
1908
               && isym->st_value + isym->st_size < toaddr)
1909
        isym->st_size -= count;
1910
    }
1911
 
1912
  /* Now adjust the global symbols defined in this section.  */
1913
  symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1914
              - symtab_hdr->sh_info);
1915
  sym_hashes = elf_sym_hashes (abfd);
1916
  end_hashes = sym_hashes + symcount;
1917
  for (; sym_hashes < end_hashes; sym_hashes++)
1918
    {
1919
      struct elf_link_hash_entry *sym_hash = *sym_hashes;
1920
 
1921
      if ((sym_hash->root.type == bfd_link_hash_defined
1922
           || sym_hash->root.type == bfd_link_hash_defweak)
1923
          && sym_hash->root.u.def.section == sec
1924
          && sym_hash->root.u.def.value > addr
1925
          && sym_hash->root.u.def.value < toaddr)
1926
        {
1927
          if (sym_hash->root.u.def.value < addr + count)
1928
            sym_hash->root.u.def.value = addr;
1929
          else
1930
            sym_hash->root.u.def.value -= count;
1931
        }
1932
      /* Adjust the function symbol's size as well.  */
1933
      else if (sym_hash->root.type == bfd_link_hash_defined
1934
               && sym_hash->root.u.def.section == sec
1935
               && sym_hash->type == STT_FUNC
1936
               && sym_hash->root.u.def.value + sym_hash->size > addr
1937
               && sym_hash->root.u.def.value + sym_hash->size < toaddr)
1938
        sym_hash->size -= count;
1939
    }
1940
 
1941
  /* See if we can move the ALIGN reloc forward.
1942
     We have adjusted r_offset for it already.  */
1943
  if (irelalign != NULL)
1944
    {
1945
      bfd_vma alignto, alignaddr;
1946
 
1947
      if ((int) irelalign->r_addend > 0)
1948
        {
1949
          /* This is the old address.  */
1950
          alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_addend);
1951
          /* This is where the align points to now.  */
1952
          alignaddr = BFD_ALIGN (irelalign->r_offset,
1953
                                 1 << irelalign->r_addend);
1954
          if (alignaddr < alignto)
1955
            /* Tail recursion.  */
1956
            return mn10300_elf_relax_delete_bytes (abfd, sec, alignaddr,
1957
                                                   (int) (alignto - alignaddr));
1958
        }
1959
    }
1960
 
1961
  return TRUE;
1962
}
1963
 
1964
/* Return TRUE if a symbol exists at the given address, else return
1965
   FALSE.  */
1966
 
1967
static bfd_boolean
1968
mn10300_elf_symbol_address_p (bfd *abfd,
1969
                              asection *sec,
1970
                              Elf_Internal_Sym *isym,
1971
                              bfd_vma addr)
1972
{
1973
  Elf_Internal_Shdr *symtab_hdr;
1974
  unsigned int sec_shndx;
1975
  Elf_Internal_Sym *isymend;
1976
  struct elf_link_hash_entry **sym_hashes;
1977
  struct elf_link_hash_entry **end_hashes;
1978
  unsigned int symcount;
1979
 
1980
  sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1981
 
1982
  /* Examine all the symbols.  */
1983
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1984
  for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1985
    if (isym->st_shndx == sec_shndx
1986
        && isym->st_value == addr)
1987
      return TRUE;
1988
 
1989
  symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1990
              - symtab_hdr->sh_info);
1991
  sym_hashes = elf_sym_hashes (abfd);
1992
  end_hashes = sym_hashes + symcount;
1993
  for (; sym_hashes < end_hashes; sym_hashes++)
1994
    {
1995
      struct elf_link_hash_entry *sym_hash = *sym_hashes;
1996
 
1997
      if ((sym_hash->root.type == bfd_link_hash_defined
1998
           || sym_hash->root.type == bfd_link_hash_defweak)
1999
          && sym_hash->root.u.def.section == sec
2000
          && sym_hash->root.u.def.value == addr)
2001
        return TRUE;
2002
    }
2003
 
2004
  return FALSE;
2005
}
2006
 
2007
/* This function handles relaxing for the mn10300.
2008
 
2009
   There are quite a few relaxing opportunities available on the mn10300:
2010
 
2011
        * calls:32 -> calls:16                                     2 bytes
2012
        * call:32  -> call:16                                      2 bytes
2013
 
2014
        * call:32 -> calls:32                                      1 byte
2015
        * call:16 -> calls:16                                      1 byte
2016
                * These are done anytime using "calls" would result
2017
                in smaller code, or when necessary to preserve the
2018
                meaning of the program.
2019
 
2020
        * call:32                                                  varies
2021
        * call:16
2022
                * In some circumstances we can move instructions
2023
                from a function prologue into a "call" instruction.
2024
                This is only done if the resulting code is no larger
2025
                than the original code.
2026
 
2027
        * jmp:32 -> jmp:16                                         2 bytes
2028
        * jmp:16 -> bra:8                                          1 byte
2029
 
2030
                * If the previous instruction is a conditional branch
2031
                around the jump/bra, we may be able to reverse its condition
2032
                and change its target to the jump's target.  The jump/bra
2033
                can then be deleted.                               2 bytes
2034
 
2035
        * mov abs32 -> mov abs16                                   1 or 2 bytes
2036
 
2037
        * Most instructions which accept imm32 can relax to imm16  1 or 2 bytes
2038
        - Most instructions which accept imm16 can relax to imm8   1 or 2 bytes
2039
 
2040
        * Most instructions which accept d32 can relax to d16      1 or 2 bytes
2041
        - Most instructions which accept d16 can relax to d8       1 or 2 bytes
2042
 
2043
        We don't handle imm16->imm8 or d16->d8 as they're very rare
2044
        and somewhat more difficult to support.  */
2045
 
2046
static bfd_boolean
2047
mn10300_elf_relax_section (bfd *abfd,
2048
                           asection *sec,
2049
                           struct bfd_link_info *link_info,
2050
                           bfd_boolean *again)
2051
{
2052
  Elf_Internal_Shdr *symtab_hdr;
2053
  Elf_Internal_Rela *internal_relocs = NULL;
2054
  Elf_Internal_Rela *irel, *irelend;
2055
  bfd_byte *contents = NULL;
2056
  Elf_Internal_Sym *isymbuf = NULL;
2057
  struct elf32_mn10300_link_hash_table *hash_table;
2058
  asection *section = sec;
2059
  bfd_vma align_gap_adjustment;
2060
 
2061
  if (link_info->relocatable)
2062
    (*link_info->callbacks->einfo)
2063
      (_("%P%F: --relax and -r may not be used together\n"));
2064
 
2065
  /* Assume nothing changes.  */
2066
  *again = FALSE;
2067
 
2068
  /* We need a pointer to the mn10300 specific hash table.  */
2069
  hash_table = elf32_mn10300_hash_table (link_info);
2070
  if (hash_table == NULL)
2071
    return FALSE;
2072
 
2073
  /* Initialize fields in each hash table entry the first time through.  */
2074
  if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
2075
    {
2076
      bfd *input_bfd;
2077
 
2078
      /* Iterate over all the input bfds.  */
2079
      for (input_bfd = link_info->input_bfds;
2080
           input_bfd != NULL;
2081
           input_bfd = input_bfd->link_next)
2082
        {
2083
          /* We're going to need all the symbols for each bfd.  */
2084
          symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2085
          if (symtab_hdr->sh_info != 0)
2086
            {
2087
              isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2088
              if (isymbuf == NULL)
2089
                isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2090
                                                symtab_hdr->sh_info, 0,
2091
                                                NULL, NULL, NULL);
2092
              if (isymbuf == NULL)
2093
                goto error_return;
2094
            }
2095
 
2096
          /* Iterate over each section in this bfd.  */
2097
          for (section = input_bfd->sections;
2098
               section != NULL;
2099
               section = section->next)
2100
            {
2101
              struct elf32_mn10300_link_hash_entry *hash;
2102
              asection *sym_sec = NULL;
2103
              const char *sym_name;
2104
              char *new_name;
2105
 
2106
              /* If there's nothing to do in this section, skip it.  */
2107
              if (! ((section->flags & SEC_RELOC) != 0
2108
                     && section->reloc_count != 0))
2109
                continue;
2110
              if ((section->flags & SEC_ALLOC) == 0)
2111
                continue;
2112
 
2113
              /* Get cached copy of section contents if it exists.  */
2114
              if (elf_section_data (section)->this_hdr.contents != NULL)
2115
                contents = elf_section_data (section)->this_hdr.contents;
2116
              else if (section->size != 0)
2117
                {
2118
                  /* Go get them off disk.  */
2119
                  if (!bfd_malloc_and_get_section (input_bfd, section,
2120
                                                   &contents))
2121
                    goto error_return;
2122
                }
2123
              else
2124
                contents = NULL;
2125
 
2126
              /* If there aren't any relocs, then there's nothing to do.  */
2127
              if ((section->flags & SEC_RELOC) != 0
2128
                  && section->reloc_count != 0)
2129
                {
2130
                  /* Get a copy of the native relocations.  */
2131
                  internal_relocs = _bfd_elf_link_read_relocs (input_bfd, section,
2132
                                                               NULL, NULL,
2133
                                                               link_info->keep_memory);
2134
                  if (internal_relocs == NULL)
2135
                    goto error_return;
2136
 
2137
                  /* Now examine each relocation.  */
2138
                  irel = internal_relocs;
2139
                  irelend = irel + section->reloc_count;
2140
                  for (; irel < irelend; irel++)
2141
                    {
2142
                      long r_type;
2143
                      unsigned long r_index;
2144
                      unsigned char code;
2145
 
2146
                      r_type = ELF32_R_TYPE (irel->r_info);
2147
                      r_index = ELF32_R_SYM (irel->r_info);
2148
 
2149
                      if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
2150
                        goto error_return;
2151
 
2152
                      /* We need the name and hash table entry of the target
2153
                         symbol!  */
2154
                      hash = NULL;
2155
                      sym_sec = NULL;
2156
 
2157
                      if (r_index < symtab_hdr->sh_info)
2158
                        {
2159
                          /* A local symbol.  */
2160
                          Elf_Internal_Sym *isym;
2161
                          struct elf_link_hash_table *elftab;
2162
                          bfd_size_type amt;
2163
 
2164
                          isym = isymbuf + r_index;
2165
                          if (isym->st_shndx == SHN_UNDEF)
2166
                            sym_sec = bfd_und_section_ptr;
2167
                          else if (isym->st_shndx == SHN_ABS)
2168
                            sym_sec = bfd_abs_section_ptr;
2169
                          else if (isym->st_shndx == SHN_COMMON)
2170
                            sym_sec = bfd_com_section_ptr;
2171
                          else
2172
                            sym_sec
2173
                              = bfd_section_from_elf_index (input_bfd,
2174
                                                            isym->st_shndx);
2175
 
2176
                          sym_name
2177
                            = bfd_elf_string_from_elf_section (input_bfd,
2178
                                                               (symtab_hdr
2179
                                                                ->sh_link),
2180
                                                               isym->st_name);
2181
 
2182
                          /* If it isn't a function, then we don't care
2183
                             about it.  */
2184
                          if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
2185
                            continue;
2186
 
2187
                          /* Tack on an ID so we can uniquely identify this
2188
                             local symbol in the global hash table.  */
2189
                          amt = strlen (sym_name) + 10;
2190
                          new_name = bfd_malloc (amt);
2191
                          if (new_name == NULL)
2192
                            goto error_return;
2193
 
2194
                          sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2195
                          sym_name = new_name;
2196
 
2197
                          elftab = &hash_table->static_hash_table->root;
2198
                          hash = ((struct elf32_mn10300_link_hash_entry *)
2199
                                  elf_link_hash_lookup (elftab, sym_name,
2200
                                                        TRUE, TRUE, FALSE));
2201
                          free (new_name);
2202
                        }
2203
                      else
2204
                        {
2205
                          r_index -= symtab_hdr->sh_info;
2206
                          hash = (struct elf32_mn10300_link_hash_entry *)
2207
                                   elf_sym_hashes (input_bfd)[r_index];
2208
                        }
2209
 
2210
                      sym_name = hash->root.root.root.string;
2211
                      if ((section->flags & SEC_CODE) != 0)
2212
                        {
2213
                          /* If this is not a "call" instruction, then we
2214
                             should convert "call" instructions to "calls"
2215
                             instructions.  */
2216
                          code = bfd_get_8 (input_bfd,
2217
                                            contents + irel->r_offset - 1);
2218
                          if (code != 0xdd && code != 0xcd)
2219
                            hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
2220
                        }
2221
 
2222
                      /* If this is a jump/call, then bump the
2223
                         direct_calls counter.  Else force "call" to
2224
                         "calls" conversions.  */
2225
                      if (r_type == R_MN10300_PCREL32
2226
                          || r_type == R_MN10300_PLT32
2227
                          || r_type == R_MN10300_PLT16
2228
                          || r_type == R_MN10300_PCREL16)
2229
                        hash->direct_calls++;
2230
                      else
2231
                        hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
2232
                    }
2233
                }
2234
 
2235
              /* Now look at the actual contents to get the stack size,
2236
                 and a list of what registers were saved in the prologue
2237
                 (ie movm_args).  */
2238
              if ((section->flags & SEC_CODE) != 0)
2239
                {
2240
                  Elf_Internal_Sym *isym, *isymend;
2241
                  unsigned int sec_shndx;
2242
                  struct elf_link_hash_entry **hashes;
2243
                  struct elf_link_hash_entry **end_hashes;
2244
                  unsigned int symcount;
2245
 
2246
                  sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2247
                                                                 section);
2248
 
2249
                  symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2250
                              - symtab_hdr->sh_info);
2251
                  hashes = elf_sym_hashes (input_bfd);
2252
                  end_hashes = hashes + symcount;
2253
 
2254
                  /* Look at each function defined in this section and
2255
                     update info for that function.  */
2256
                  isymend = isymbuf + symtab_hdr->sh_info;
2257
                  for (isym = isymbuf; isym < isymend; isym++)
2258
                    {
2259
                      if (isym->st_shndx == sec_shndx
2260
                          && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
2261
                        {
2262
                          struct elf_link_hash_table *elftab;
2263
                          bfd_size_type amt;
2264
                          struct elf_link_hash_entry **lhashes = hashes;
2265
 
2266
                          /* Skip a local symbol if it aliases a
2267
                             global one.  */
2268
                          for (; lhashes < end_hashes; lhashes++)
2269
                            {
2270
                              hash = (struct elf32_mn10300_link_hash_entry *) *lhashes;
2271
                              if ((hash->root.root.type == bfd_link_hash_defined
2272
                                   || hash->root.root.type == bfd_link_hash_defweak)
2273
                                  && hash->root.root.u.def.section == section
2274
                                  && hash->root.type == STT_FUNC
2275
                                  && hash->root.root.u.def.value == isym->st_value)
2276
                                break;
2277
                            }
2278
                          if (lhashes != end_hashes)
2279
                            continue;
2280
 
2281
                          if (isym->st_shndx == SHN_UNDEF)
2282
                            sym_sec = bfd_und_section_ptr;
2283
                          else if (isym->st_shndx == SHN_ABS)
2284
                            sym_sec = bfd_abs_section_ptr;
2285
                          else if (isym->st_shndx == SHN_COMMON)
2286
                            sym_sec = bfd_com_section_ptr;
2287
                          else
2288
                            sym_sec
2289
                              = bfd_section_from_elf_index (input_bfd,
2290
                                                            isym->st_shndx);
2291
 
2292
                          sym_name = (bfd_elf_string_from_elf_section
2293
                                      (input_bfd, symtab_hdr->sh_link,
2294
                                       isym->st_name));
2295
 
2296
                          /* Tack on an ID so we can uniquely identify this
2297
                             local symbol in the global hash table.  */
2298
                          amt = strlen (sym_name) + 10;
2299
                          new_name = bfd_malloc (amt);
2300
                          if (new_name == NULL)
2301
                            goto error_return;
2302
 
2303
                          sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2304
                          sym_name = new_name;
2305
 
2306
                          elftab = &hash_table->static_hash_table->root;
2307
                          hash = ((struct elf32_mn10300_link_hash_entry *)
2308
                                  elf_link_hash_lookup (elftab, sym_name,
2309
                                                        TRUE, TRUE, FALSE));
2310
                          free (new_name);
2311
                          compute_function_info (input_bfd, hash,
2312
                                                 isym->st_value, contents);
2313
                          hash->value = isym->st_value;
2314
                        }
2315
                    }
2316
 
2317
                  for (; hashes < end_hashes; hashes++)
2318
                    {
2319
                      hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2320
                      if ((hash->root.root.type == bfd_link_hash_defined
2321
                           || hash->root.root.type == bfd_link_hash_defweak)
2322
                          && hash->root.root.u.def.section == section
2323
                          && hash->root.type == STT_FUNC)
2324
                        compute_function_info (input_bfd, hash,
2325
                                               (hash)->root.root.u.def.value,
2326
                                               contents);
2327
                    }
2328
                }
2329
 
2330
              /* Cache or free any memory we allocated for the relocs.  */
2331
              if (internal_relocs != NULL
2332
                  && elf_section_data (section)->relocs != internal_relocs)
2333
                free (internal_relocs);
2334
              internal_relocs = NULL;
2335
 
2336
              /* Cache or free any memory we allocated for the contents.  */
2337
              if (contents != NULL
2338
                  && elf_section_data (section)->this_hdr.contents != contents)
2339
                {
2340
                  if (! link_info->keep_memory)
2341
                    free (contents);
2342
                  else
2343
                    {
2344
                      /* Cache the section contents for elf_link_input_bfd.  */
2345
                      elf_section_data (section)->this_hdr.contents = contents;
2346
                    }
2347
                }
2348
              contents = NULL;
2349
            }
2350
 
2351
          /* Cache or free any memory we allocated for the symbols.  */
2352
          if (isymbuf != NULL
2353
              && symtab_hdr->contents != (unsigned char *) isymbuf)
2354
            {
2355
              if (! link_info->keep_memory)
2356
                free (isymbuf);
2357
              else
2358
                {
2359
                  /* Cache the symbols for elf_link_input_bfd.  */
2360
                  symtab_hdr->contents = (unsigned char *) isymbuf;
2361
                }
2362
            }
2363
          isymbuf = NULL;
2364
        }
2365
 
2366
      /* Now iterate on each symbol in the hash table and perform
2367
         the final initialization steps on each.  */
2368
      elf32_mn10300_link_hash_traverse (hash_table,
2369
                                        elf32_mn10300_finish_hash_table_entry,
2370
                                        link_info);
2371
      elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
2372
                                        elf32_mn10300_finish_hash_table_entry,
2373
                                        link_info);
2374
 
2375
      {
2376
        /* This section of code collects all our local symbols, sorts
2377
           them by value, and looks for multiple symbols referring to
2378
           the same address.  For those symbols, the flags are merged.
2379
           At this point, the only flag that can be set is
2380
           MN10300_CONVERT_CALL_TO_CALLS, so we simply OR the flags
2381
           together.  */
2382
        int static_count = 0, i;
2383
        struct elf32_mn10300_link_hash_entry **entries;
2384
        struct elf32_mn10300_link_hash_entry **ptr;
2385
 
2386
        elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
2387
                                          elf32_mn10300_count_hash_table_entries,
2388
                                          &static_count);
2389
 
2390
        entries = bfd_malloc (static_count * sizeof (* ptr));
2391
 
2392
        ptr = entries;
2393
        elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
2394
                                          elf32_mn10300_list_hash_table_entries,
2395
                                          & ptr);
2396
 
2397
        qsort (entries, static_count, sizeof (entries[0]), sort_by_value);
2398
 
2399
        for (i = 0; i < static_count - 1; i++)
2400
          if (entries[i]->value && entries[i]->value == entries[i+1]->value)
2401
            {
2402
              int v = entries[i]->flags;
2403
              int j;
2404
 
2405
              for (j = i + 1; j < static_count && entries[j]->value == entries[i]->value; j++)
2406
                v |= entries[j]->flags;
2407
 
2408
              for (j = i; j < static_count && entries[j]->value == entries[i]->value; j++)
2409
                entries[j]->flags = v;
2410
 
2411
              i = j - 1;
2412
            }
2413
      }
2414
 
2415
      /* All entries in the hash table are fully initialized.  */
2416
      hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
2417
 
2418
      /* Now that everything has been initialized, go through each
2419
         code section and delete any prologue insns which will be
2420
         redundant because their operations will be performed by
2421
         a "call" instruction.  */
2422
      for (input_bfd = link_info->input_bfds;
2423
           input_bfd != NULL;
2424
           input_bfd = input_bfd->link_next)
2425
        {
2426
          /* We're going to need all the local symbols for each bfd.  */
2427
          symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2428
          if (symtab_hdr->sh_info != 0)
2429
            {
2430
              isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2431
              if (isymbuf == NULL)
2432
                isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2433
                                                symtab_hdr->sh_info, 0,
2434
                                                NULL, NULL, NULL);
2435
              if (isymbuf == NULL)
2436
                goto error_return;
2437
            }
2438
 
2439
          /* Walk over each section in this bfd.  */
2440
          for (section = input_bfd->sections;
2441
               section != NULL;
2442
               section = section->next)
2443
            {
2444
              unsigned int sec_shndx;
2445
              Elf_Internal_Sym *isym, *isymend;
2446
              struct elf_link_hash_entry **hashes;
2447
              struct elf_link_hash_entry **end_hashes;
2448
              unsigned int symcount;
2449
 
2450
              /* Skip non-code sections and empty sections.  */
2451
              if ((section->flags & SEC_CODE) == 0 || section->size == 0)
2452
                continue;
2453
 
2454
              if (section->reloc_count != 0)
2455
                {
2456
                  /* Get a copy of the native relocations.  */
2457
                  internal_relocs = _bfd_elf_link_read_relocs (input_bfd, section,
2458
                                                               NULL, NULL,
2459
                                                               link_info->keep_memory);
2460
                  if (internal_relocs == NULL)
2461
                    goto error_return;
2462
                }
2463
 
2464
              /* Get cached copy of section contents if it exists.  */
2465
              if (elf_section_data (section)->this_hdr.contents != NULL)
2466
                contents = elf_section_data (section)->this_hdr.contents;
2467
              else
2468
                {
2469
                  /* Go get them off disk.  */
2470
                  if (!bfd_malloc_and_get_section (input_bfd, section,
2471
                                                   &contents))
2472
                    goto error_return;
2473
                }
2474
 
2475
              sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2476
                                                             section);
2477
 
2478
              /* Now look for any function in this section which needs
2479
                 insns deleted from its prologue.  */
2480
              isymend = isymbuf + symtab_hdr->sh_info;
2481
              for (isym = isymbuf; isym < isymend; isym++)
2482
                {
2483
                  struct elf32_mn10300_link_hash_entry *sym_hash;
2484
                  asection *sym_sec = NULL;
2485
                  const char *sym_name;
2486
                  char *new_name;
2487
                  struct elf_link_hash_table *elftab;
2488
                  bfd_size_type amt;
2489
 
2490
                  if (isym->st_shndx != sec_shndx)
2491
                    continue;
2492
 
2493
                  if (isym->st_shndx == SHN_UNDEF)
2494
                    sym_sec = bfd_und_section_ptr;
2495
                  else if (isym->st_shndx == SHN_ABS)
2496
                    sym_sec = bfd_abs_section_ptr;
2497
                  else if (isym->st_shndx == SHN_COMMON)
2498
                    sym_sec = bfd_com_section_ptr;
2499
                  else
2500
                    sym_sec
2501
                      = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
2502
 
2503
                  sym_name
2504
                    = bfd_elf_string_from_elf_section (input_bfd,
2505
                                                       symtab_hdr->sh_link,
2506
                                                       isym->st_name);
2507
 
2508
                  /* Tack on an ID so we can uniquely identify this
2509
                     local symbol in the global hash table.  */
2510
                  amt = strlen (sym_name) + 10;
2511
                  new_name = bfd_malloc (amt);
2512
                  if (new_name == NULL)
2513
                    goto error_return;
2514
                  sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2515
                  sym_name = new_name;
2516
 
2517
                  elftab = & hash_table->static_hash_table->root;
2518
                  sym_hash = (struct elf32_mn10300_link_hash_entry *)
2519
                    elf_link_hash_lookup (elftab, sym_name,
2520
                                          FALSE, FALSE, FALSE);
2521
 
2522
                  free (new_name);
2523
                  if (sym_hash == NULL)
2524
                    continue;
2525
 
2526
                  if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2527
                      && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2528
                    {
2529
                      int bytes = 0;
2530
 
2531
                      /* Note that we've changed things.  */
2532
                      elf_section_data (section)->relocs = internal_relocs;
2533
                      elf_section_data (section)->this_hdr.contents = contents;
2534
                      symtab_hdr->contents = (unsigned char *) isymbuf;
2535
 
2536
                      /* Count how many bytes we're going to delete.  */
2537
                      if (sym_hash->movm_args)
2538
                        bytes += 2;
2539
 
2540
                      if (sym_hash->stack_size > 0)
2541
                        {
2542
                          if (sym_hash->stack_size <= 128)
2543
                            bytes += 3;
2544
                          else
2545
                            bytes += 4;
2546
                        }
2547
 
2548
                      /* Note that we've deleted prologue bytes for this
2549
                         function.  */
2550
                      sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2551
 
2552
                      /* Actually delete the bytes.  */
2553
                      if (!mn10300_elf_relax_delete_bytes (input_bfd,
2554
                                                           section,
2555
                                                           isym->st_value,
2556
                                                           bytes))
2557
                        goto error_return;
2558
 
2559
                      /* Something changed.  Not strictly necessary, but
2560
                         may lead to more relaxing opportunities.  */
2561
                      *again = TRUE;
2562
                    }
2563
                }
2564
 
2565
              /* Look for any global functions in this section which
2566
                 need insns deleted from their prologues.  */
2567
              symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2568
                          - symtab_hdr->sh_info);
2569
              hashes = elf_sym_hashes (input_bfd);
2570
              end_hashes = hashes + symcount;
2571
              for (; hashes < end_hashes; hashes++)
2572
                {
2573
                  struct elf32_mn10300_link_hash_entry *sym_hash;
2574
 
2575
                  sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2576
                  if ((sym_hash->root.root.type == bfd_link_hash_defined
2577
                       || sym_hash->root.root.type == bfd_link_hash_defweak)
2578
                      && sym_hash->root.root.u.def.section == section
2579
                      && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2580
                      && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2581
                    {
2582
                      int bytes = 0;
2583
                      bfd_vma symval;
2584
 
2585
                      /* Note that we've changed things.  */
2586
                      elf_section_data (section)->relocs = internal_relocs;
2587
                      elf_section_data (section)->this_hdr.contents = contents;
2588
                      symtab_hdr->contents = (unsigned char *) isymbuf;
2589
 
2590
                      /* Count how many bytes we're going to delete.  */
2591
                      if (sym_hash->movm_args)
2592
                        bytes += 2;
2593
 
2594
                      if (sym_hash->stack_size > 0)
2595
                        {
2596
                          if (sym_hash->stack_size <= 128)
2597
                            bytes += 3;
2598
                          else
2599
                            bytes += 4;
2600
                        }
2601
 
2602
                      /* Note that we've deleted prologue bytes for this
2603
                         function.  */
2604
                      sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2605
 
2606
                      /* Actually delete the bytes.  */
2607
                      symval = sym_hash->root.root.u.def.value;
2608
                      if (!mn10300_elf_relax_delete_bytes (input_bfd,
2609
                                                           section,
2610
                                                           symval,
2611
                                                           bytes))
2612
                        goto error_return;
2613
 
2614
                      /* Something changed.  Not strictly necessary, but
2615
                         may lead to more relaxing opportunities.  */
2616
                      *again = TRUE;
2617
                    }
2618
                }
2619
 
2620
              /* Cache or free any memory we allocated for the relocs.  */
2621
              if (internal_relocs != NULL
2622
                  && elf_section_data (section)->relocs != internal_relocs)
2623
                free (internal_relocs);
2624
              internal_relocs = NULL;
2625
 
2626
              /* Cache or free any memory we allocated for the contents.  */
2627
              if (contents != NULL
2628
                  && elf_section_data (section)->this_hdr.contents != contents)
2629
                {
2630
                  if (! link_info->keep_memory)
2631
                    free (contents);
2632
                  else
2633
                    /* Cache the section contents for elf_link_input_bfd.  */
2634
                    elf_section_data (section)->this_hdr.contents = contents;
2635
                }
2636
              contents = NULL;
2637
            }
2638
 
2639
          /* Cache or free any memory we allocated for the symbols.  */
2640
          if (isymbuf != NULL
2641
              && symtab_hdr->contents != (unsigned char *) isymbuf)
2642
            {
2643
              if (! link_info->keep_memory)
2644
                free (isymbuf);
2645
              else
2646
                /* Cache the symbols for elf_link_input_bfd.  */
2647
                symtab_hdr->contents = (unsigned char *) isymbuf;
2648
            }
2649
          isymbuf = NULL;
2650
        }
2651
    }
2652
 
2653
  /* (Re)initialize for the basic instruction shortening/relaxing pass.  */
2654
  contents = NULL;
2655
  internal_relocs = NULL;
2656
  isymbuf = NULL;
2657
  /* For error_return.  */
2658
  section = sec;
2659
 
2660
  /* We don't have to do anything for a relocatable link, if
2661
     this section does not have relocs, or if this is not a
2662
     code section.  */
2663
  if (link_info->relocatable
2664
      || (sec->flags & SEC_RELOC) == 0
2665
      || sec->reloc_count == 0
2666
      || (sec->flags & SEC_CODE) == 0)
2667
    return TRUE;
2668
 
2669
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2670
 
2671
  /* Get a copy of the native relocations.  */
2672
  internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
2673
                                               link_info->keep_memory);
2674
  if (internal_relocs == NULL)
2675
    goto error_return;
2676
 
2677
  /* Scan for worst case alignment gap changes.  Note that this logic
2678
     is not ideal; what we should do is run this scan for every
2679
     opcode/address range and adjust accordingly, but that's
2680
     expensive.  Worst case is that for an alignment of N bytes, we
2681
     move by 2*N-N-1 bytes, assuming we have aligns of 1, 2, 4, 8, etc
2682
     all before it.  Plus, this still doesn't cover cross-section
2683
     jumps with section alignment.  */
2684
  irelend = internal_relocs + sec->reloc_count;
2685
  align_gap_adjustment = 0;
2686
  for (irel = internal_relocs; irel < irelend; irel++)
2687
    {
2688
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN)
2689
        {
2690
          bfd_vma adj = 1 << irel->r_addend;
2691
          bfd_vma aend = irel->r_offset;
2692
 
2693
          aend = BFD_ALIGN (aend, 1 << irel->r_addend);
2694
          adj = 2 * adj - adj - 1;
2695
 
2696
          /* Record the biggest adjustmnet.  Skip any alignment at the
2697
             end of our section.  */
2698
          if (align_gap_adjustment < adj
2699
              && aend < sec->output_section->vma + sec->output_offset + sec->size)
2700
            align_gap_adjustment = adj;
2701
        }
2702
    }
2703
 
2704
  /* Walk through them looking for relaxing opportunities.  */
2705
  irelend = internal_relocs + sec->reloc_count;
2706
  for (irel = internal_relocs; irel < irelend; irel++)
2707
    {
2708
      bfd_vma symval;
2709
      bfd_signed_vma jump_offset;
2710
      asection *sym_sec = NULL;
2711
      struct elf32_mn10300_link_hash_entry *h = NULL;
2712
 
2713
      /* If this isn't something that can be relaxed, then ignore
2714
         this reloc.  */
2715
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
2716
          || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
2717
          || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
2718
        continue;
2719
 
2720
      /* Get the section contents if we haven't done so already.  */
2721
      if (contents == NULL)
2722
        {
2723
          /* Get cached copy if it exists.  */
2724
          if (elf_section_data (sec)->this_hdr.contents != NULL)
2725
            contents = elf_section_data (sec)->this_hdr.contents;
2726
          else
2727
            {
2728
              /* Go get them off disk.  */
2729
              if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2730
                goto error_return;
2731
            }
2732
        }
2733
 
2734
      /* Read this BFD's symbols if we haven't done so already.  */
2735
      if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2736
        {
2737
          isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2738
          if (isymbuf == NULL)
2739
            isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2740
                                            symtab_hdr->sh_info, 0,
2741
                                            NULL, NULL, NULL);
2742
          if (isymbuf == NULL)
2743
            goto error_return;
2744
        }
2745
 
2746
      /* Get the value of the symbol referred to by the reloc.  */
2747
      if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2748
        {
2749
          Elf_Internal_Sym *isym;
2750
          const char *sym_name;
2751
          char *new_name;
2752
 
2753
          /* A local symbol.  */
2754
          isym = isymbuf + ELF32_R_SYM (irel->r_info);
2755
          if (isym->st_shndx == SHN_UNDEF)
2756
            sym_sec = bfd_und_section_ptr;
2757
          else if (isym->st_shndx == SHN_ABS)
2758
            sym_sec = bfd_abs_section_ptr;
2759
          else if (isym->st_shndx == SHN_COMMON)
2760
            sym_sec = bfd_com_section_ptr;
2761
          else
2762
            sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2763
 
2764
          sym_name = bfd_elf_string_from_elf_section (abfd,
2765
                                                      symtab_hdr->sh_link,
2766
                                                      isym->st_name);
2767
 
2768
          if ((sym_sec->flags & SEC_MERGE)
2769
              && sym_sec->sec_info_type == ELF_INFO_TYPE_MERGE)
2770
            {
2771
              symval = isym->st_value;
2772
 
2773
              /* GAS may reduce relocations against symbols in SEC_MERGE
2774
                 sections to a relocation against the section symbol when
2775
                 the original addend was zero.  When the reloc is against
2776
                 a section symbol we should include the addend in the
2777
                 offset passed to _bfd_merged_section_offset, since the
2778
                 location of interest is the original symbol.  On the
2779
                 other hand, an access to "sym+addend" where "sym" is not
2780
                 a section symbol should not include the addend;  Such an
2781
                 access is presumed to be an offset from "sym";  The
2782
                 location of interest is just "sym".  */
2783
              if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
2784
                symval += irel->r_addend;
2785
 
2786
              symval = _bfd_merged_section_offset (abfd, & sym_sec,
2787
                                                   elf_section_data (sym_sec)->sec_info,
2788
                                                   symval);
2789
 
2790
              if (ELF_ST_TYPE (isym->st_info) != STT_SECTION)
2791
                symval += irel->r_addend;
2792
 
2793
              symval += sym_sec->output_section->vma
2794
                + sym_sec->output_offset - irel->r_addend;
2795
            }
2796
          else
2797
            symval = (isym->st_value
2798
                      + sym_sec->output_section->vma
2799
                      + sym_sec->output_offset);
2800
 
2801
          /* Tack on an ID so we can uniquely identify this
2802
             local symbol in the global hash table.  */
2803
          new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
2804
          if (new_name == NULL)
2805
            goto error_return;
2806
          sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2807
          sym_name = new_name;
2808
 
2809
          h = (struct elf32_mn10300_link_hash_entry *)
2810
                elf_link_hash_lookup (&hash_table->static_hash_table->root,
2811
                                      sym_name, FALSE, FALSE, FALSE);
2812
          free (new_name);
2813
        }
2814
      else
2815
        {
2816
          unsigned long indx;
2817
 
2818
          /* An external symbol.  */
2819
          indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2820
          h = (struct elf32_mn10300_link_hash_entry *)
2821
                (elf_sym_hashes (abfd)[indx]);
2822
          BFD_ASSERT (h != NULL);
2823
          if (h->root.root.type != bfd_link_hash_defined
2824
              && h->root.root.type != bfd_link_hash_defweak)
2825
            /* This appears to be a reference to an undefined
2826
               symbol.  Just ignore it--it will be caught by the
2827
               regular reloc processing.  */
2828
            continue;
2829
 
2830
          /* Check for a reference to a discarded symbol and ignore it.  */
2831
          if (h->root.root.u.def.section->output_section == NULL)
2832
            continue;
2833
 
2834
          sym_sec = h->root.root.u.def.section->output_section;
2835
 
2836
          symval = (h->root.root.u.def.value
2837
                    + h->root.root.u.def.section->output_section->vma
2838
                    + h->root.root.u.def.section->output_offset);
2839
        }
2840
 
2841
      /* For simplicity of coding, we are going to modify the section
2842
         contents, the section relocs, and the BFD symbol table.  We
2843
         must tell the rest of the code not to free up this
2844
         information.  It would be possible to instead create a table
2845
         of changes which have to be made, as is done in coff-mips.c;
2846
         that would be more work, but would require less memory when
2847
         the linker is run.  */
2848
 
2849
      /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
2850
         branch/call, also deal with "call" -> "calls" conversions and
2851
         insertion of prologue data into "call" instructions.  */
2852
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
2853
          || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
2854
        {
2855
          bfd_vma value = symval;
2856
 
2857
          if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
2858
              && h != NULL
2859
              && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
2860
              && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
2861
              && h->root.plt.offset != (bfd_vma) -1)
2862
            {
2863
              asection * splt;
2864
 
2865
              splt = bfd_get_section_by_name (elf_hash_table (link_info)
2866
                                              ->dynobj, ".plt");
2867
 
2868
              value = ((splt->output_section->vma
2869
                        + splt->output_offset
2870
                        + h->root.plt.offset)
2871
                       - (sec->output_section->vma
2872
                          + sec->output_offset
2873
                          + irel->r_offset));
2874
            }
2875
 
2876
          /* If we've got a "call" instruction that needs to be turned
2877
             into a "calls" instruction, do so now.  It saves a byte.  */
2878
          if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2879
            {
2880
              unsigned char code;
2881
 
2882
              /* Get the opcode.  */
2883
              code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2884
 
2885
              /* Make sure we're working with a "call" instruction!  */
2886
              if (code == 0xdd)
2887
                {
2888
                  /* Note that we've changed the relocs, section contents,
2889
                     etc.  */
2890
                  elf_section_data (sec)->relocs = internal_relocs;
2891
                  elf_section_data (sec)->this_hdr.contents = contents;
2892
                  symtab_hdr->contents = (unsigned char *) isymbuf;
2893
 
2894
                  /* Fix the opcode.  */
2895
                  bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
2896
                  bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2897
 
2898
                  /* Fix irel->r_offset and irel->r_addend.  */
2899
                  irel->r_offset += 1;
2900
                  irel->r_addend += 1;
2901
 
2902
                  /* Delete one byte of data.  */
2903
                  if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2904
                                                       irel->r_offset + 3, 1))
2905
                    goto error_return;
2906
 
2907
                  /* That will change things, so, we should relax again.
2908
                     Note that this is not required, and it may be slow.  */
2909
                  *again = TRUE;
2910
                }
2911
            }
2912
          else if (h)
2913
            {
2914
              /* We've got a "call" instruction which needs some data
2915
                 from target function filled in.  */
2916
              unsigned char code;
2917
 
2918
              /* Get the opcode.  */
2919
              code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2920
 
2921
              /* Insert data from the target function into the "call"
2922
                 instruction if needed.  */
2923
              if (code == 0xdd)
2924
                {
2925
                  bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
2926
                  bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2927
                             contents + irel->r_offset + 5);
2928
                }
2929
            }
2930
 
2931
          /* Deal with pc-relative gunk.  */
2932
          value -= (sec->output_section->vma + sec->output_offset);
2933
          value -= irel->r_offset;
2934
          value += irel->r_addend;
2935
 
2936
          /* See if the value will fit in 16 bits, note the high value is
2937
             0x7fff + 2 as the target will be two bytes closer if we are
2938
             able to relax, if it's in the same section.  */
2939
          if (sec->output_section == sym_sec->output_section)
2940
            jump_offset = 0x8001;
2941
          else
2942
            jump_offset = 0x7fff;
2943
 
2944
          /* Account for jumps across alignment boundaries using
2945
             align_gap_adjustment.  */
2946
          if ((bfd_signed_vma) value < jump_offset - (bfd_signed_vma) align_gap_adjustment
2947
              && ((bfd_signed_vma) value > -0x8000 + (bfd_signed_vma) align_gap_adjustment))
2948
            {
2949
              unsigned char code;
2950
 
2951
              /* Get the opcode.  */
2952
              code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2953
 
2954
              if (code != 0xdc && code != 0xdd && code != 0xff)
2955
                continue;
2956
 
2957
              /* Note that we've changed the relocs, section contents, etc.  */
2958
              elf_section_data (sec)->relocs = internal_relocs;
2959
              elf_section_data (sec)->this_hdr.contents = contents;
2960
              symtab_hdr->contents = (unsigned char *) isymbuf;
2961
 
2962
              /* Fix the opcode.  */
2963
              if (code == 0xdc)
2964
                bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
2965
              else if (code == 0xdd)
2966
                bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
2967
              else if (code == 0xff)
2968
                bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2969
 
2970
              /* Fix the relocation's type.  */
2971
              irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2972
                                           (ELF32_R_TYPE (irel->r_info)
2973
                                            == (int) R_MN10300_PLT32)
2974
                                           ? R_MN10300_PLT16 :
2975
                                           R_MN10300_PCREL16);
2976
 
2977
              /* Delete two bytes of data.  */
2978
              if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2979
                                                   irel->r_offset + 1, 2))
2980
                goto error_return;
2981
 
2982
              /* That will change things, so, we should relax again.
2983
                 Note that this is not required, and it may be slow.  */
2984
              *again = TRUE;
2985
            }
2986
        }
2987
 
2988
      /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
2989
         branch.  */
2990
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
2991
        {
2992
          bfd_vma value = symval;
2993
 
2994
          /* If we've got a "call" instruction that needs to be turned
2995
             into a "calls" instruction, do so now.  It saves a byte.  */
2996
          if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2997
            {
2998
              unsigned char code;
2999
 
3000
              /* Get the opcode.  */
3001
              code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3002
 
3003
              /* Make sure we're working with a "call" instruction!  */
3004
              if (code == 0xcd)
3005
                {
3006
                  /* Note that we've changed the relocs, section contents,
3007
                     etc.  */
3008
                  elf_section_data (sec)->relocs = internal_relocs;
3009
                  elf_section_data (sec)->this_hdr.contents = contents;
3010
                  symtab_hdr->contents = (unsigned char *) isymbuf;
3011
 
3012
                  /* Fix the opcode.  */
3013
                  bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
3014
                  bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
3015
 
3016
                  /* Fix irel->r_offset and irel->r_addend.  */
3017
                  irel->r_offset += 1;
3018
                  irel->r_addend += 1;
3019
 
3020
                  /* Delete one byte of data.  */
3021
                  if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3022
                                                       irel->r_offset + 1, 1))
3023
                    goto error_return;
3024
 
3025
                  /* That will change things, so, we should relax again.
3026
                     Note that this is not required, and it may be slow.  */
3027
                  *again = TRUE;
3028
                }
3029
            }
3030
          else if (h)
3031
            {
3032
              unsigned char code;
3033
 
3034
              /* Get the opcode.  */
3035
              code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3036
 
3037
              /* Insert data from the target function into the "call"
3038
                 instruction if needed.  */
3039
              if (code == 0xcd)
3040
                {
3041
                  bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
3042
                  bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
3043
                             contents + irel->r_offset + 3);
3044
                }
3045
            }
3046
 
3047
          /* Deal with pc-relative gunk.  */
3048
          value -= (sec->output_section->vma + sec->output_offset);
3049
          value -= irel->r_offset;
3050
          value += irel->r_addend;
3051
 
3052
          /* See if the value will fit in 8 bits, note the high value is
3053
             0x7f + 1 as the target will be one bytes closer if we are
3054
             able to relax.  */
3055
          if ((long) value < 0x80 && (long) value > -0x80)
3056
            {
3057
              unsigned char code;
3058
 
3059
              /* Get the opcode.  */
3060
              code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3061
 
3062
              if (code != 0xcc)
3063
                continue;
3064
 
3065
              /* Note that we've changed the relocs, section contents, etc.  */
3066
              elf_section_data (sec)->relocs = internal_relocs;
3067
              elf_section_data (sec)->this_hdr.contents = contents;
3068
              symtab_hdr->contents = (unsigned char *) isymbuf;
3069
 
3070
              /* Fix the opcode.  */
3071
              bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
3072
 
3073
              /* Fix the relocation's type.  */
3074
              irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3075
                                           R_MN10300_PCREL8);
3076
 
3077
              /* Delete one byte of data.  */
3078
              if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3079
                                                   irel->r_offset + 1, 1))
3080
                goto error_return;
3081
 
3082
              /* That will change things, so, we should relax again.
3083
                 Note that this is not required, and it may be slow.  */
3084
              *again = TRUE;
3085
            }
3086
        }
3087
 
3088
      /* Try to eliminate an unconditional 8 bit pc-relative branch
3089
         which immediately follows a conditional 8 bit pc-relative
3090
         branch around the unconditional branch.
3091
 
3092
            original:           new:
3093
            bCC lab1            bCC' lab2
3094
            bra lab2
3095
           lab1:               lab1:
3096
 
3097
         This happens when the bCC can't reach lab2 at assembly time,
3098
         but due to other relaxations it can reach at link time.  */
3099
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
3100
        {
3101
          Elf_Internal_Rela *nrel;
3102
          bfd_vma value = symval;
3103
          unsigned char code;
3104
 
3105
          /* Deal with pc-relative gunk.  */
3106
          value -= (sec->output_section->vma + sec->output_offset);
3107
          value -= irel->r_offset;
3108
          value += irel->r_addend;
3109
 
3110
          /* Do nothing if this reloc is the last byte in the section.  */
3111
          if (irel->r_offset == sec->size)
3112
            continue;
3113
 
3114
          /* See if the next instruction is an unconditional pc-relative
3115
             branch, more often than not this test will fail, so we
3116
             test it first to speed things up.  */
3117
          code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
3118
          if (code != 0xca)
3119
            continue;
3120
 
3121
          /* Also make sure the next relocation applies to the next
3122
             instruction and that it's a pc-relative 8 bit branch.  */
3123
          nrel = irel + 1;
3124
          if (nrel == irelend
3125
              || irel->r_offset + 2 != nrel->r_offset
3126
              || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
3127
            continue;
3128
 
3129
          /* Make sure our destination immediately follows the
3130
             unconditional branch.  */
3131
          if (symval != (sec->output_section->vma + sec->output_offset
3132
                         + irel->r_offset + 3))
3133
            continue;
3134
 
3135
          /* Now make sure we are a conditional branch.  This may not
3136
             be necessary, but why take the chance.
3137
 
3138
             Note these checks assume that R_MN10300_PCREL8 relocs
3139
             only occur on bCC and bCCx insns.  If they occured
3140
             elsewhere, we'd need to know the start of this insn
3141
             for this check to be accurate.  */
3142
          code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3143
          if (code != 0xc0 && code != 0xc1 && code != 0xc2
3144
              && code != 0xc3 && code != 0xc4 && code != 0xc5
3145
              && code != 0xc6 && code != 0xc7 && code != 0xc8
3146
              && code != 0xc9 && code != 0xe8 && code != 0xe9
3147
              && code != 0xea && code != 0xeb)
3148
            continue;
3149
 
3150
          /* We also have to be sure there is no symbol/label
3151
             at the unconditional branch.  */
3152
          if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
3153
                                            irel->r_offset + 1))
3154
            continue;
3155
 
3156
          /* Note that we've changed the relocs, section contents, etc.  */
3157
          elf_section_data (sec)->relocs = internal_relocs;
3158
          elf_section_data (sec)->this_hdr.contents = contents;
3159
          symtab_hdr->contents = (unsigned char *) isymbuf;
3160
 
3161
          /* Reverse the condition of the first branch.  */
3162
          switch (code)
3163
            {
3164
            case 0xc8:
3165
              code = 0xc9;
3166
              break;
3167
            case 0xc9:
3168
              code = 0xc8;
3169
              break;
3170
            case 0xc0:
3171
              code = 0xc2;
3172
              break;
3173
            case 0xc2:
3174
              code = 0xc0;
3175
              break;
3176
            case 0xc3:
3177
              code = 0xc1;
3178
              break;
3179
            case 0xc1:
3180
              code = 0xc3;
3181
              break;
3182
            case 0xc4:
3183
              code = 0xc6;
3184
              break;
3185
            case 0xc6:
3186
              code = 0xc4;
3187
              break;
3188
            case 0xc7:
3189
              code = 0xc5;
3190
              break;
3191
            case 0xc5:
3192
              code = 0xc7;
3193
              break;
3194
            case 0xe8:
3195
              code = 0xe9;
3196
              break;
3197
            case 0x9d:
3198
              code = 0xe8;
3199
              break;
3200
            case 0xea:
3201
              code = 0xeb;
3202
              break;
3203
            case 0xeb:
3204
              code = 0xea;
3205
              break;
3206
            }
3207
          bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3208
 
3209
          /* Set the reloc type and symbol for the first branch
3210
             from the second branch.  */
3211
          irel->r_info = nrel->r_info;
3212
 
3213
          /* Make the reloc for the second branch a null reloc.  */
3214
          nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
3215
                                       R_MN10300_NONE);
3216
 
3217
          /* Delete two bytes of data.  */
3218
          if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3219
                                               irel->r_offset + 1, 2))
3220
            goto error_return;
3221
 
3222
          /* That will change things, so, we should relax again.
3223
             Note that this is not required, and it may be slow.  */
3224
          *again = TRUE;
3225
        }
3226
 
3227
      /* Try to turn a 24 immediate, displacement or absolute address
3228
         into a 8 immediate, displacement or absolute address.  */
3229
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
3230
        {
3231
          bfd_vma value = symval;
3232
          value += irel->r_addend;
3233
 
3234
          /* See if the value will fit in 8 bits.  */
3235
          if ((long) value < 0x7f && (long) value > -0x80)
3236
            {
3237
              unsigned char code;
3238
 
3239
              /* AM33 insns which have 24 operands are 6 bytes long and
3240
                 will have 0xfd as the first byte.  */
3241
 
3242
              /* Get the first opcode.  */
3243
              code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
3244
 
3245
              if (code == 0xfd)
3246
                {
3247
                  /* Get the second opcode.  */
3248
                  code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
3249
 
3250
                  /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
3251
                     equivalent instructions exists.  */
3252
                  if (code != 0x6b && code != 0x7b
3253
                      && code != 0x8b && code != 0x9b
3254
                      && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
3255
                          || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
3256
                          || (code & 0x0f) == 0x0e))
3257
                    {
3258
                      /* Not safe if the high bit is on as relaxing may
3259
                         move the value out of high mem and thus not fit
3260
                         in a signed 8bit value.  This is currently over
3261
                         conservative.  */
3262
                      if ((value & 0x80) == 0)
3263
                        {
3264
                          /* Note that we've changed the relocation contents,
3265
                             etc.  */
3266
                          elf_section_data (sec)->relocs = internal_relocs;
3267
                          elf_section_data (sec)->this_hdr.contents = contents;
3268
                          symtab_hdr->contents = (unsigned char *) isymbuf;
3269
 
3270
                          /* Fix the opcode.  */
3271
                          bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
3272
                          bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3273
 
3274
                          /* Fix the relocation's type.  */
3275
                          irel->r_info =
3276
                            ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3277
                                          R_MN10300_8);
3278
 
3279
                          /* Delete two bytes of data.  */
3280
                          if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3281
                                                               irel->r_offset + 1, 2))
3282
                            goto error_return;
3283
 
3284
                          /* That will change things, so, we should relax
3285
                             again.  Note that this is not required, and it
3286
                             may be slow.  */
3287
                          *again = TRUE;
3288
                          break;
3289
                        }
3290
                    }
3291
                }
3292
            }
3293
        }
3294
 
3295
      /* Try to turn a 32bit immediate, displacement or absolute address
3296
         into a 16bit immediate, displacement or absolute address.  */
3297
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
3298
          || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
3299
          || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
3300
        {
3301
          bfd_vma value = symval;
3302
 
3303
          if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
3304
            {
3305
              asection * sgot;
3306
 
3307
              sgot = bfd_get_section_by_name (elf_hash_table (link_info)
3308
                                              ->dynobj, ".got");
3309
 
3310
              if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
3311
                {
3312
                  value = sgot->output_offset;
3313
 
3314
                  if (h)
3315
                    value += h->root.got.offset;
3316
                  else
3317
                    value += (elf_local_got_offsets
3318
                              (abfd)[ELF32_R_SYM (irel->r_info)]);
3319
                }
3320
              else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
3321
                value -= sgot->output_section->vma;
3322
              else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
3323
                value = (sgot->output_section->vma
3324
                         - (sec->output_section->vma
3325
                            + sec->output_offset
3326
                            + irel->r_offset));
3327
              else
3328
                abort ();
3329
            }
3330
 
3331
          value += irel->r_addend;
3332
 
3333
          /* See if the value will fit in 24 bits.
3334
             We allow any 16bit match here.  We prune those we can't
3335
             handle below.  */
3336
          if ((long) value < 0x7fffff && (long) value > -0x800000)
3337
            {
3338
              unsigned char code;
3339
 
3340
              /* AM33 insns which have 32bit operands are 7 bytes long and
3341
                 will have 0xfe as the first byte.  */
3342
 
3343
              /* Get the first opcode.  */
3344
              code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
3345
 
3346
              if (code == 0xfe)
3347
                {
3348
                  /* Get the second opcode.  */
3349
                  code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
3350
 
3351
                  /* All the am33 32 -> 24 relaxing possibilities.  */
3352
                  /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
3353
                     equivalent instructions exists.  */
3354
                  if (code != 0x6b && code != 0x7b
3355
                      && code != 0x8b && code != 0x9b
3356
                      && (ELF32_R_TYPE (irel->r_info)
3357
                          != (int) R_MN10300_GOTPC32)
3358
                      && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
3359
                          || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
3360
                          || (code & 0x0f) == 0x0e))
3361
                    {
3362
                      /* Not safe if the high bit is on as relaxing may
3363
                         move the value out of high mem and thus not fit
3364
                         in a signed 16bit value.  This is currently over
3365
                         conservative.  */
3366
                      if ((value & 0x8000) == 0)
3367
                        {
3368
                          /* Note that we've changed the relocation contents,
3369
                             etc.  */
3370
                          elf_section_data (sec)->relocs = internal_relocs;
3371
                          elf_section_data (sec)->this_hdr.contents = contents;
3372
                          symtab_hdr->contents = (unsigned char *) isymbuf;
3373
 
3374
                          /* Fix the opcode.  */
3375
                          bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
3376
                          bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3377
 
3378
                          /* Fix the relocation's type.  */
3379
                          irel->r_info =
3380
                            ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3381
                                          (ELF32_R_TYPE (irel->r_info)
3382
                                           == (int) R_MN10300_GOTOFF32)
3383
                                          ? R_MN10300_GOTOFF24
3384
                                          : (ELF32_R_TYPE (irel->r_info)
3385
                                             == (int) R_MN10300_GOT32)
3386
                                          ? R_MN10300_GOT24 :
3387
                                          R_MN10300_24);
3388
 
3389
                          /* Delete one byte of data.  */
3390
                          if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3391
                                                               irel->r_offset + 3, 1))
3392
                            goto error_return;
3393
 
3394
                          /* That will change things, so, we should relax
3395
                             again.  Note that this is not required, and it
3396
                             may be slow.  */
3397
                          *again = TRUE;
3398
                          break;
3399
                        }
3400
                    }
3401
                }
3402
            }
3403
 
3404
          /* See if the value will fit in 16 bits.
3405
             We allow any 16bit match here.  We prune those we can't
3406
             handle below.  */
3407
          if ((long) value < 0x7fff && (long) value > -0x8000)
3408
            {
3409
              unsigned char code;
3410
 
3411
              /* Most insns which have 32bit operands are 6 bytes long;
3412
                 exceptions are pcrel insns and bit insns.
3413
 
3414
                 We handle pcrel insns above.  We don't bother trying
3415
                 to handle the bit insns here.
3416
 
3417
                 The first byte of the remaining insns will be 0xfc.  */
3418
 
3419
              /* Get the first opcode.  */
3420
              code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
3421
 
3422
              if (code != 0xfc)
3423
                continue;
3424
 
3425
              /* Get the second opcode.  */
3426
              code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3427
 
3428
              if ((code & 0xf0) < 0x80)
3429
                switch (code & 0xf0)
3430
                  {
3431
                  /* mov (d32,am),dn   -> mov (d32,am),dn
3432
                     mov dm,(d32,am)   -> mov dn,(d32,am)
3433
                     mov (d32,am),an   -> mov (d32,am),an
3434
                     mov dm,(d32,am)   -> mov dn,(d32,am)
3435
                     movbu (d32,am),dn -> movbu (d32,am),dn
3436
                     movbu dm,(d32,am) -> movbu dn,(d32,am)
3437
                     movhu (d32,am),dn -> movhu (d32,am),dn
3438
                     movhu dm,(d32,am) -> movhu dn,(d32,am) */
3439
                  case 0x00:
3440
                  case 0x10:
3441
                  case 0x20:
3442
                  case 0x30:
3443
                  case 0x40:
3444
                  case 0x50:
3445
                  case 0x60:
3446
                  case 0x70:
3447
                    /* Not safe if the high bit is on as relaxing may
3448
                       move the value out of high mem and thus not fit
3449
                       in a signed 16bit value.  */
3450
                    if (code == 0xcc
3451
                        && (value & 0x8000))
3452
                      continue;
3453
 
3454
                    /* Note that we've changed the relocation contents, etc.  */
3455
                    elf_section_data (sec)->relocs = internal_relocs;
3456
                    elf_section_data (sec)->this_hdr.contents = contents;
3457
                    symtab_hdr->contents = (unsigned char *) isymbuf;
3458
 
3459
                    /* Fix the opcode.  */
3460
                    bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3461
                    bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3462
 
3463
                    /* Fix the relocation's type.  */
3464
                    irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3465
                                                 (ELF32_R_TYPE (irel->r_info)
3466
                                                  == (int) R_MN10300_GOTOFF32)
3467
                                                 ? R_MN10300_GOTOFF16
3468
                                                 : (ELF32_R_TYPE (irel->r_info)
3469
                                                    == (int) R_MN10300_GOT32)
3470
                                                 ? R_MN10300_GOT16
3471
                                                 : (ELF32_R_TYPE (irel->r_info)
3472
                                                    == (int) R_MN10300_GOTPC32)
3473
                                                 ? R_MN10300_GOTPC16 :
3474
                                                 R_MN10300_16);
3475
 
3476
                    /* Delete two bytes of data.  */
3477
                    if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3478
                                                         irel->r_offset + 2, 2))
3479
                      goto error_return;
3480
 
3481
                    /* That will change things, so, we should relax again.
3482
                       Note that this is not required, and it may be slow.  */
3483
                    *again = TRUE;
3484
                    break;
3485
                  }
3486
              else if ((code & 0xf0) == 0x80
3487
                       || (code & 0xf0) == 0x90)
3488
                switch (code & 0xf3)
3489
                  {
3490
                  /* mov dn,(abs32)   -> mov dn,(abs16)
3491
                     movbu dn,(abs32) -> movbu dn,(abs16)
3492
                     movhu dn,(abs32) -> movhu dn,(abs16)  */
3493
                  case 0x81:
3494
                  case 0x82:
3495
                  case 0x83:
3496
                    /* Note that we've changed the relocation contents, etc.  */
3497
                    elf_section_data (sec)->relocs = internal_relocs;
3498
                    elf_section_data (sec)->this_hdr.contents = contents;
3499
                    symtab_hdr->contents = (unsigned char *) isymbuf;
3500
 
3501
                    if ((code & 0xf3) == 0x81)
3502
                      code = 0x01 + (code & 0x0c);
3503
                    else if ((code & 0xf3) == 0x82)
3504
                      code = 0x02 + (code & 0x0c);
3505
                    else if ((code & 0xf3) == 0x83)
3506
                      code = 0x03 + (code & 0x0c);
3507
                    else
3508
                      abort ();
3509
 
3510
                    /* Fix the opcode.  */
3511
                    bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3512
 
3513
                    /* Fix the relocation's type.  */
3514
                    irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3515
                                                 (ELF32_R_TYPE (irel->r_info)
3516
                                                  == (int) R_MN10300_GOTOFF32)
3517
                                                 ? R_MN10300_GOTOFF16
3518
                                                 : (ELF32_R_TYPE (irel->r_info)
3519
                                                    == (int) R_MN10300_GOT32)
3520
                                                 ? R_MN10300_GOT16
3521
                                                 : (ELF32_R_TYPE (irel->r_info)
3522
                                                    == (int) R_MN10300_GOTPC32)
3523
                                                 ? R_MN10300_GOTPC16 :
3524
                                                 R_MN10300_16);
3525
 
3526
                    /* The opcode got shorter too, so we have to fix the
3527
                       addend and offset too!  */
3528
                    irel->r_offset -= 1;
3529
 
3530
                    /* Delete three bytes of data.  */
3531
                    if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3532
                                                         irel->r_offset + 1, 3))
3533
                      goto error_return;
3534
 
3535
                    /* That will change things, so, we should relax again.
3536
                       Note that this is not required, and it may be slow.  */
3537
                    *again = TRUE;
3538
                    break;
3539
 
3540
                  /* mov am,(abs32)    -> mov am,(abs16)
3541
                     mov am,(d32,sp)   -> mov am,(d16,sp)
3542
                     mov dm,(d32,sp)   -> mov dm,(d32,sp)
3543
                     movbu dm,(d32,sp) -> movbu dm,(d32,sp)
3544
                     movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
3545
                  case 0x80:
3546
                  case 0x90:
3547
                  case 0x91:
3548
                  case 0x92:
3549
                  case 0x93:
3550
                    /* sp-based offsets are zero-extended.  */
3551
                    if (code >= 0x90 && code <= 0x93
3552
                        && (long) value < 0)
3553
                      continue;
3554
 
3555
                    /* Note that we've changed the relocation contents, etc.  */
3556
                    elf_section_data (sec)->relocs = internal_relocs;
3557
                    elf_section_data (sec)->this_hdr.contents = contents;
3558
                    symtab_hdr->contents = (unsigned char *) isymbuf;
3559
 
3560
                    /* Fix the opcode.  */
3561
                    bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3562
                    bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3563
 
3564
                    /* Fix the relocation's type.  */
3565
                    irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3566
                                                 (ELF32_R_TYPE (irel->r_info)
3567
                                                  == (int) R_MN10300_GOTOFF32)
3568
                                                 ? R_MN10300_GOTOFF16
3569
                                                 : (ELF32_R_TYPE (irel->r_info)
3570
                                                    == (int) R_MN10300_GOT32)
3571
                                                 ? R_MN10300_GOT16
3572
                                                 : (ELF32_R_TYPE (irel->r_info)
3573
                                                    == (int) R_MN10300_GOTPC32)
3574
                                                 ? R_MN10300_GOTPC16 :
3575
                                                 R_MN10300_16);
3576
 
3577
                    /* Delete two bytes of data.  */
3578
                    if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3579
                                                         irel->r_offset + 2, 2))
3580
                      goto error_return;
3581
 
3582
                    /* That will change things, so, we should relax again.
3583
                       Note that this is not required, and it may be slow.  */
3584
                    *again = TRUE;
3585
                    break;
3586
                  }
3587
              else if ((code & 0xf0) < 0xf0)
3588
                switch (code & 0xfc)
3589
                  {
3590
                  /* mov imm32,dn     -> mov imm16,dn
3591
                     mov imm32,an     -> mov imm16,an
3592
                     mov (abs32),dn   -> mov (abs16),dn
3593
                     movbu (abs32),dn -> movbu (abs16),dn
3594
                     movhu (abs32),dn -> movhu (abs16),dn  */
3595
                  case 0xcc:
3596
                  case 0xdc:
3597
                  case 0xa4:
3598
                  case 0xa8:
3599
                  case 0xac:
3600
                    /* Not safe if the high bit is on as relaxing may
3601
                       move the value out of high mem and thus not fit
3602
                       in a signed 16bit value.  */
3603
                    if (code == 0xcc
3604
                        && (value & 0x8000))
3605
                      continue;
3606
 
3607 163 khays
                    /* "mov imm16, an" zero-extends the immediate.  */
3608
                    if ((code & 0xfc) == 0xdc
3609 14 khays
                        && (long) value < 0)
3610
                      continue;
3611
 
3612
                    /* Note that we've changed the relocation contents, etc.  */
3613
                    elf_section_data (sec)->relocs = internal_relocs;
3614
                    elf_section_data (sec)->this_hdr.contents = contents;
3615
                    symtab_hdr->contents = (unsigned char *) isymbuf;
3616
 
3617
                    if ((code & 0xfc) == 0xcc)
3618
                      code = 0x2c + (code & 0x03);
3619
                    else if ((code & 0xfc) == 0xdc)
3620
                      code = 0x24 + (code & 0x03);
3621
                    else if ((code & 0xfc) == 0xa4)
3622
                      code = 0x30 + (code & 0x03);
3623
                    else if ((code & 0xfc) == 0xa8)
3624
                      code = 0x34 + (code & 0x03);
3625
                    else if ((code & 0xfc) == 0xac)
3626
                      code = 0x38 + (code & 0x03);
3627
                    else
3628
                      abort ();
3629
 
3630
                    /* Fix the opcode.  */
3631
                    bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3632
 
3633
                    /* Fix the relocation's type.  */
3634
                    irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3635
                                                 (ELF32_R_TYPE (irel->r_info)
3636
                                                  == (int) R_MN10300_GOTOFF32)
3637
                                                 ? R_MN10300_GOTOFF16
3638
                                                 : (ELF32_R_TYPE (irel->r_info)
3639
                                                    == (int) R_MN10300_GOT32)
3640
                                                 ? R_MN10300_GOT16
3641
                                                 : (ELF32_R_TYPE (irel->r_info)
3642
                                                    == (int) R_MN10300_GOTPC32)
3643
                                                 ? R_MN10300_GOTPC16 :
3644
                                                 R_MN10300_16);
3645
 
3646
                    /* The opcode got shorter too, so we have to fix the
3647
                       addend and offset too!  */
3648
                    irel->r_offset -= 1;
3649
 
3650
                    /* Delete three bytes of data.  */
3651
                    if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3652
                                                         irel->r_offset + 1, 3))
3653
                      goto error_return;
3654
 
3655
                    /* That will change things, so, we should relax again.
3656
                       Note that this is not required, and it may be slow.  */
3657
                    *again = TRUE;
3658
                    break;
3659
 
3660
                  /* mov (abs32),an    -> mov (abs16),an
3661
                     mov (d32,sp),an   -> mov (d16,sp),an
3662
                     mov (d32,sp),dn   -> mov (d16,sp),dn
3663
                     movbu (d32,sp),dn -> movbu (d16,sp),dn
3664
                     movhu (d32,sp),dn -> movhu (d16,sp),dn
3665
                     add imm32,dn      -> add imm16,dn
3666
                     cmp imm32,dn      -> cmp imm16,dn
3667
                     add imm32,an      -> add imm16,an
3668
                     cmp imm32,an      -> cmp imm16,an
3669
                     and imm32,dn      -> and imm16,dn
3670
                     or imm32,dn       -> or imm16,dn
3671
                     xor imm32,dn      -> xor imm16,dn
3672
                     btst imm32,dn     -> btst imm16,dn */
3673
 
3674
                  case 0xa0:
3675
                  case 0xb0:
3676
                  case 0xb1:
3677
                  case 0xb2:
3678
                  case 0xb3:
3679
                  case 0xc0:
3680
                  case 0xc8:
3681
 
3682
                  case 0xd0:
3683
                  case 0xd8:
3684
                  case 0xe0:
3685
                  case 0xe1:
3686
                  case 0xe2:
3687
                  case 0xe3:
3688
                    /* cmp imm16, an zero-extends the immediate.  */
3689
                    if (code == 0xdc
3690
                        && (long) value < 0)
3691
                      continue;
3692
 
3693
                    /* So do sp-based offsets.  */
3694
                    if (code >= 0xb0 && code <= 0xb3
3695
                        && (long) value < 0)
3696
                      continue;
3697
 
3698
                    /* Note that we've changed the relocation contents, etc.  */
3699
                    elf_section_data (sec)->relocs = internal_relocs;
3700
                    elf_section_data (sec)->this_hdr.contents = contents;
3701
                    symtab_hdr->contents = (unsigned char *) isymbuf;
3702
 
3703
                    /* Fix the opcode.  */
3704
                    bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3705
                    bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3706
 
3707
                    /* Fix the relocation's type.  */
3708
                    irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3709
                                                 (ELF32_R_TYPE (irel->r_info)
3710
                                                  == (int) R_MN10300_GOTOFF32)
3711
                                                 ? R_MN10300_GOTOFF16
3712
                                                 : (ELF32_R_TYPE (irel->r_info)
3713
                                                    == (int) R_MN10300_GOT32)
3714
                                                 ? R_MN10300_GOT16
3715
                                                 : (ELF32_R_TYPE (irel->r_info)
3716
                                                    == (int) R_MN10300_GOTPC32)
3717
                                                 ? R_MN10300_GOTPC16 :
3718
                                                 R_MN10300_16);
3719
 
3720
                    /* Delete two bytes of data.  */
3721
                    if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3722
                                                         irel->r_offset + 2, 2))
3723
                      goto error_return;
3724
 
3725
                    /* That will change things, so, we should relax again.
3726
                       Note that this is not required, and it may be slow.  */
3727
                    *again = TRUE;
3728
                    break;
3729
                  }
3730
              else if (code == 0xfe)
3731
                {
3732
                  /* add imm32,sp -> add imm16,sp  */
3733
 
3734
                  /* Note that we've changed the relocation contents, etc.  */
3735
                  elf_section_data (sec)->relocs = internal_relocs;
3736
                  elf_section_data (sec)->this_hdr.contents = contents;
3737
                  symtab_hdr->contents = (unsigned char *) isymbuf;
3738
 
3739
                  /* Fix the opcode.  */
3740
                  bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3741
                  bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
3742
 
3743
                  /* Fix the relocation's type.  */
3744
                  irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3745
                                               (ELF32_R_TYPE (irel->r_info)
3746
                                                == (int) R_MN10300_GOT32)
3747
                                               ? R_MN10300_GOT16
3748
                                               : (ELF32_R_TYPE (irel->r_info)
3749
                                                  == (int) R_MN10300_GOTOFF32)
3750
                                               ? R_MN10300_GOTOFF16
3751
                                               : (ELF32_R_TYPE (irel->r_info)
3752
                                                  == (int) R_MN10300_GOTPC32)
3753
                                               ? R_MN10300_GOTPC16 :
3754
                                               R_MN10300_16);
3755
 
3756
                  /* Delete two bytes of data.  */
3757
                  if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3758
                                                       irel->r_offset + 2, 2))
3759
                    goto error_return;
3760
 
3761
                  /* That will change things, so, we should relax again.
3762
                     Note that this is not required, and it may be slow.  */
3763
                  *again = TRUE;
3764
                  break;
3765
                }
3766
            }
3767
        }
3768
    }
3769
 
3770
  if (isymbuf != NULL
3771
      && symtab_hdr->contents != (unsigned char *) isymbuf)
3772
    {
3773
      if (! link_info->keep_memory)
3774
        free (isymbuf);
3775
      else
3776
        {
3777
          /* Cache the symbols for elf_link_input_bfd.  */
3778
          symtab_hdr->contents = (unsigned char *) isymbuf;
3779
        }
3780
    }
3781
 
3782
  if (contents != NULL
3783
      && elf_section_data (sec)->this_hdr.contents != contents)
3784
    {
3785
      if (! link_info->keep_memory)
3786
        free (contents);
3787
      else
3788
        {
3789
          /* Cache the section contents for elf_link_input_bfd.  */
3790
          elf_section_data (sec)->this_hdr.contents = contents;
3791
        }
3792
    }
3793
 
3794
  if (internal_relocs != NULL
3795
      && elf_section_data (sec)->relocs != internal_relocs)
3796
    free (internal_relocs);
3797
 
3798
  return TRUE;
3799
 
3800
 error_return:
3801
  if (isymbuf != NULL
3802
      && symtab_hdr->contents != (unsigned char *) isymbuf)
3803
    free (isymbuf);
3804
  if (contents != NULL
3805
      && elf_section_data (section)->this_hdr.contents != contents)
3806
    free (contents);
3807
  if (internal_relocs != NULL
3808
      && elf_section_data (section)->relocs != internal_relocs)
3809
    free (internal_relocs);
3810
 
3811
  return FALSE;
3812
}
3813
 
3814
/* This is a version of bfd_generic_get_relocated_section_contents
3815
   which uses mn10300_elf_relocate_section.  */
3816
 
3817
static bfd_byte *
3818
mn10300_elf_get_relocated_section_contents (bfd *output_bfd,
3819
                                            struct bfd_link_info *link_info,
3820
                                            struct bfd_link_order *link_order,
3821
                                            bfd_byte *data,
3822
                                            bfd_boolean relocatable,
3823
                                            asymbol **symbols)
3824
{
3825
  Elf_Internal_Shdr *symtab_hdr;
3826
  asection *input_section = link_order->u.indirect.section;
3827
  bfd *input_bfd = input_section->owner;
3828
  asection **sections = NULL;
3829
  Elf_Internal_Rela *internal_relocs = NULL;
3830
  Elf_Internal_Sym *isymbuf = NULL;
3831
 
3832
  /* We only need to handle the case of relaxing, or of having a
3833
     particular set of section contents, specially.  */
3834
  if (relocatable
3835
      || elf_section_data (input_section)->this_hdr.contents == NULL)
3836
    return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
3837
                                                       link_order, data,
3838
                                                       relocatable,
3839
                                                       symbols);
3840
 
3841
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3842
 
3843
  memcpy (data, elf_section_data (input_section)->this_hdr.contents,
3844
          (size_t) input_section->size);
3845
 
3846
  if ((input_section->flags & SEC_RELOC) != 0
3847
      && input_section->reloc_count > 0)
3848
    {
3849
      asection **secpp;
3850
      Elf_Internal_Sym *isym, *isymend;
3851
      bfd_size_type amt;
3852
 
3853
      internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section,
3854
                                                   NULL, NULL, FALSE);
3855
      if (internal_relocs == NULL)
3856
        goto error_return;
3857
 
3858
      if (symtab_hdr->sh_info != 0)
3859
        {
3860
          isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3861
          if (isymbuf == NULL)
3862
            isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3863
                                            symtab_hdr->sh_info, 0,
3864
                                            NULL, NULL, NULL);
3865
          if (isymbuf == NULL)
3866
            goto error_return;
3867
        }
3868
 
3869
      amt = symtab_hdr->sh_info;
3870
      amt *= sizeof (asection *);
3871
      sections = bfd_malloc (amt);
3872
      if (sections == NULL && amt != 0)
3873
        goto error_return;
3874
 
3875
      isymend = isymbuf + symtab_hdr->sh_info;
3876
      for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
3877
        {
3878
          asection *isec;
3879
 
3880
          if (isym->st_shndx == SHN_UNDEF)
3881
            isec = bfd_und_section_ptr;
3882
          else if (isym->st_shndx == SHN_ABS)
3883
            isec = bfd_abs_section_ptr;
3884
          else if (isym->st_shndx == SHN_COMMON)
3885
            isec = bfd_com_section_ptr;
3886
          else
3887
            isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
3888
 
3889
          *secpp = isec;
3890
        }
3891
 
3892
      if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
3893
                                          input_section, data, internal_relocs,
3894
                                          isymbuf, sections))
3895
        goto error_return;
3896
 
3897
      if (sections != NULL)
3898
        free (sections);
3899
      if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3900
        free (isymbuf);
3901
      if (internal_relocs != elf_section_data (input_section)->relocs)
3902
        free (internal_relocs);
3903
    }
3904
 
3905
  return data;
3906
 
3907
 error_return:
3908
  if (sections != NULL)
3909
    free (sections);
3910
  if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3911
    free (isymbuf);
3912
  if (internal_relocs != NULL
3913
      && internal_relocs != elf_section_data (input_section)->relocs)
3914
    free (internal_relocs);
3915
  return NULL;
3916
}
3917
 
3918
/* Assorted hash table functions.  */
3919
 
3920
/* Initialize an entry in the link hash table.  */
3921
 
3922
/* Create an entry in an MN10300 ELF linker hash table.  */
3923
 
3924
static struct bfd_hash_entry *
3925
elf32_mn10300_link_hash_newfunc (struct bfd_hash_entry *entry,
3926
                                 struct bfd_hash_table *table,
3927
                                 const char *string)
3928
{
3929
  struct elf32_mn10300_link_hash_entry *ret =
3930
    (struct elf32_mn10300_link_hash_entry *) entry;
3931
 
3932
  /* Allocate the structure if it has not already been allocated by a
3933
     subclass.  */
3934
  if (ret == NULL)
3935
    ret = (struct elf32_mn10300_link_hash_entry *)
3936
           bfd_hash_allocate (table, sizeof (* ret));
3937
  if (ret == NULL)
3938
    return (struct bfd_hash_entry *) ret;
3939
 
3940
  /* Call the allocation method of the superclass.  */
3941
  ret = (struct elf32_mn10300_link_hash_entry *)
3942
         _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3943
                                     table, string);
3944
  if (ret != NULL)
3945
    {
3946
      ret->direct_calls = 0;
3947
      ret->stack_size = 0;
3948
      ret->movm_args = 0;
3949
      ret->movm_stack_size = 0;
3950
      ret->flags = 0;
3951
      ret->value = 0;
3952
    }
3953
 
3954
  return (struct bfd_hash_entry *) ret;
3955
}
3956
 
3957
/* Create an mn10300 ELF linker hash table.  */
3958
 
3959
static struct bfd_link_hash_table *
3960
elf32_mn10300_link_hash_table_create (bfd *abfd)
3961
{
3962
  struct elf32_mn10300_link_hash_table *ret;
3963
  bfd_size_type amt = sizeof (* ret);
3964
 
3965
  ret = bfd_malloc (amt);
3966
  if (ret == NULL)
3967
    return NULL;
3968
 
3969
  if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
3970
                                      elf32_mn10300_link_hash_newfunc,
3971
                                      sizeof (struct elf32_mn10300_link_hash_entry),
3972
                                      MN10300_ELF_DATA))
3973
    {
3974
      free (ret);
3975
      return NULL;
3976
    }
3977
 
3978
  ret->flags = 0;
3979
  amt = sizeof (struct elf_link_hash_table);
3980
  ret->static_hash_table = bfd_malloc (amt);
3981
  if (ret->static_hash_table == NULL)
3982
    {
3983
      free (ret);
3984
      return NULL;
3985
    }
3986
 
3987
  if (!_bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
3988
                                      elf32_mn10300_link_hash_newfunc,
3989
                                      sizeof (struct elf32_mn10300_link_hash_entry),
3990
                                      MN10300_ELF_DATA))
3991
    {
3992
      free (ret->static_hash_table);
3993
      free (ret);
3994
      return NULL;
3995
    }
3996
  return & ret->root.root;
3997
}
3998
 
3999
/* Free an mn10300 ELF linker hash table.  */
4000
 
4001
static void
4002
elf32_mn10300_link_hash_table_free (struct bfd_link_hash_table *hash)
4003
{
4004
  struct elf32_mn10300_link_hash_table *ret
4005
    = (struct elf32_mn10300_link_hash_table *) hash;
4006
 
4007
  _bfd_generic_link_hash_table_free
4008
    ((struct bfd_link_hash_table *) ret->static_hash_table);
4009
  _bfd_generic_link_hash_table_free
4010
    ((struct bfd_link_hash_table *) ret);
4011
}
4012
 
4013
static unsigned long
4014
elf_mn10300_mach (flagword flags)
4015
{
4016
  switch (flags & EF_MN10300_MACH)
4017
    {
4018
    case E_MN10300_MACH_MN10300:
4019
    default:
4020
      return bfd_mach_mn10300;
4021
 
4022
    case E_MN10300_MACH_AM33:
4023
      return bfd_mach_am33;
4024
 
4025
    case E_MN10300_MACH_AM33_2:
4026
      return bfd_mach_am33_2;
4027
    }
4028
}
4029
 
4030
/* The final processing done just before writing out a MN10300 ELF object
4031
   file.  This gets the MN10300 architecture right based on the machine
4032
   number.  */
4033
 
4034
static void
4035
_bfd_mn10300_elf_final_write_processing (bfd *abfd,
4036
                                         bfd_boolean linker ATTRIBUTE_UNUSED)
4037
{
4038
  unsigned long val;
4039
 
4040
  switch (bfd_get_mach (abfd))
4041
    {
4042
    default:
4043
    case bfd_mach_mn10300:
4044
      val = E_MN10300_MACH_MN10300;
4045
      break;
4046
 
4047
    case bfd_mach_am33:
4048
      val = E_MN10300_MACH_AM33;
4049
      break;
4050
 
4051
    case bfd_mach_am33_2:
4052
      val = E_MN10300_MACH_AM33_2;
4053
      break;
4054
    }
4055
 
4056
  elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
4057
  elf_elfheader (abfd)->e_flags |= val;
4058
}
4059
 
4060
static bfd_boolean
4061
_bfd_mn10300_elf_object_p (bfd *abfd)
4062
{
4063
  bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
4064
                             elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
4065
  return TRUE;
4066
}
4067
 
4068
/* Merge backend specific data from an object file to the output
4069
   object file when linking.  */
4070
 
4071
static bfd_boolean
4072
_bfd_mn10300_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4073
{
4074
  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4075
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4076
    return TRUE;
4077
 
4078
  if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
4079
      && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
4080
    {
4081
      if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
4082
                               bfd_get_mach (ibfd)))
4083
        return FALSE;
4084
    }
4085
 
4086
  return TRUE;
4087
}
4088
 
4089
#define PLT0_ENTRY_SIZE     15
4090
#define PLT_ENTRY_SIZE      20
4091
#define PIC_PLT_ENTRY_SIZE  24
4092
 
4093
static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
4094
{
4095
  0xfc, 0xa0, 0, 0, 0, 0,   /* mov  (.got+8),a0 */
4096
  0xfe, 0xe, 0x10, 0, 0, 0, 0,      /* mov  (.got+4),r1 */
4097
  0xf0, 0xf4,                   /* jmp  (a0) */
4098
};
4099
 
4100
static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
4101
{
4102
  0xfc, 0xa0, 0, 0, 0, 0,   /* mov  (nameN@GOT + .got),a0 */
4103
  0xf0, 0xf4,                   /* jmp  (a0) */
4104
  0xfe, 8, 0, 0, 0, 0, 0,    /* mov  reloc-table-address,r0 */
4105
  0xdc, 0, 0, 0, 0,         /* jmp  .plt0 */
4106
};
4107
 
4108
static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
4109
{
4110
  0xfc, 0x22, 0, 0, 0, 0,   /* mov  (nameN@GOT,a2),a0 */
4111
  0xf0, 0xf4,                   /* jmp  (a0) */
4112
  0xfe, 8, 0, 0, 0, 0, 0,    /* mov  reloc-table-address,r0 */
4113
  0xf8, 0x22, 8,                /* mov  (8,a2),a0 */
4114
  0xfb, 0xa, 0x1a, 4,           /* mov  (4,a2),r1 */
4115
  0xf0, 0xf4,                   /* jmp  (a0) */
4116
};
4117
 
4118
/* Return size of the first PLT entry.  */
4119
#define elf_mn10300_sizeof_plt0(info) \
4120
  (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
4121
 
4122
/* Return size of a PLT entry.  */
4123
#define elf_mn10300_sizeof_plt(info) \
4124
  (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
4125
 
4126
/* Return offset of the PLT0 address in an absolute PLT entry.  */
4127
#define elf_mn10300_plt_plt0_offset(info) 16
4128
 
4129
/* Return offset of the linker in PLT0 entry.  */
4130
#define elf_mn10300_plt0_linker_offset(info) 2
4131
 
4132
/* Return offset of the GOT id in PLT0 entry.  */
4133
#define elf_mn10300_plt0_gotid_offset(info) 9
4134
 
4135
/* Return offset of the temporary in PLT entry.  */
4136
#define elf_mn10300_plt_temp_offset(info) 8
4137
 
4138
/* Return offset of the symbol in PLT entry.  */
4139
#define elf_mn10300_plt_symbol_offset(info) 2
4140
 
4141
/* Return offset of the relocation in PLT entry.  */
4142
#define elf_mn10300_plt_reloc_offset(info) 11
4143
 
4144
/* The name of the dynamic interpreter.  This is put in the .interp
4145
   section.  */
4146
 
4147
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
4148
 
4149
/* Create dynamic sections when linking against a dynamic object.  */
4150
 
4151
static bfd_boolean
4152
_bfd_mn10300_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
4153
{
4154
  flagword   flags;
4155
  asection * s;
4156
  const struct elf_backend_data * bed = get_elf_backend_data (abfd);
4157
  int ptralign = 0;
4158
 
4159
  switch (bed->s->arch_size)
4160
    {
4161
    case 32:
4162
      ptralign = 2;
4163
      break;
4164
 
4165
    case 64:
4166
      ptralign = 3;
4167
      break;
4168
 
4169
    default:
4170
      bfd_set_error (bfd_error_bad_value);
4171
      return FALSE;
4172
    }
4173
 
4174
  /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4175
     .rel[a].bss sections.  */
4176
  flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4177
           | SEC_LINKER_CREATED);
4178
 
4179
  s = bfd_make_section_with_flags (abfd,
4180
                                   (bed->default_use_rela_p
4181
                                    ? ".rela.plt" : ".rel.plt"),
4182
                                   flags | SEC_READONLY);
4183
  if (s == NULL
4184
      || ! bfd_set_section_alignment (abfd, s, ptralign))
4185
    return FALSE;
4186
 
4187
  if (! _bfd_mn10300_elf_create_got_section (abfd, info))
4188
    return FALSE;
4189
 
4190
  {
4191
    const char * secname;
4192
    char *       relname;
4193
    flagword     secflags;
4194
    asection *   sec;
4195
 
4196
    for (sec = abfd->sections; sec; sec = sec->next)
4197
      {
4198
        secflags = bfd_get_section_flags (abfd, sec);
4199
        if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
4200
            || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
4201
          continue;
4202
 
4203
        secname = bfd_get_section_name (abfd, sec);
4204
        relname = bfd_malloc (strlen (secname) + 6);
4205
        strcpy (relname, ".rela");
4206
        strcat (relname, secname);
4207
 
4208
        s = bfd_make_section_with_flags (abfd, relname,
4209
                                         flags | SEC_READONLY);
4210
        if (s == NULL
4211
            || ! bfd_set_section_alignment (abfd, s, ptralign))
4212
          return FALSE;
4213
      }
4214
  }
4215
 
4216
  if (bed->want_dynbss)
4217
    {
4218
      /* The .dynbss section is a place to put symbols which are defined
4219
         by dynamic objects, are referenced by regular objects, and are
4220
         not functions.  We must allocate space for them in the process
4221
         image and use a R_*_COPY reloc to tell the dynamic linker to
4222
         initialize them at run time.  The linker script puts the .dynbss
4223
         section into the .bss section of the final image.  */
4224
      s = bfd_make_section_with_flags (abfd, ".dynbss",
4225
                                       SEC_ALLOC | SEC_LINKER_CREATED);
4226
      if (s == NULL)
4227
        return FALSE;
4228
 
4229
      /* The .rel[a].bss section holds copy relocs.  This section is not
4230
         normally needed.  We need to create it here, though, so that the
4231
         linker will map it to an output section.  We can't just create it
4232
         only if we need it, because we will not know whether we need it
4233
         until we have seen all the input files, and the first time the
4234
         main linker code calls BFD after examining all the input files
4235
         (size_dynamic_sections) the input sections have already been
4236
         mapped to the output sections.  If the section turns out not to
4237
         be needed, we can discard it later.  We will never need this
4238
         section when generating a shared object, since they do not use
4239
         copy relocs.  */
4240
      if (! info->shared)
4241
        {
4242
          s = bfd_make_section_with_flags (abfd,
4243
                                           (bed->default_use_rela_p
4244
                                            ? ".rela.bss" : ".rel.bss"),
4245
                                           flags | SEC_READONLY);
4246
          if (s == NULL
4247
              || ! bfd_set_section_alignment (abfd, s, ptralign))
4248
            return FALSE;
4249
        }
4250
    }
4251
 
4252
  return TRUE;
4253
}
4254
 
4255
/* Adjust a symbol defined by a dynamic object and referenced by a
4256
   regular object.  The current definition is in some section of the
4257
   dynamic object, but we're not including those sections.  We have to
4258
   change the definition to something the rest of the link can
4259
   understand.  */
4260
 
4261
static bfd_boolean
4262
_bfd_mn10300_elf_adjust_dynamic_symbol (struct bfd_link_info * info,
4263
                                        struct elf_link_hash_entry * h)
4264
{
4265
  bfd * dynobj;
4266
  asection * s;
4267
 
4268
  dynobj = elf_hash_table (info)->dynobj;
4269
 
4270
  /* Make sure we know what is going on here.  */
4271
  BFD_ASSERT (dynobj != NULL
4272
              && (h->needs_plt
4273
                  || h->u.weakdef != NULL
4274
                  || (h->def_dynamic
4275
                      && h->ref_regular
4276
                      && !h->def_regular)));
4277
 
4278
  /* If this is a function, put it in the procedure linkage table.  We
4279
     will fill in the contents of the procedure linkage table later,
4280
     when we know the address of the .got section.  */
4281
  if (h->type == STT_FUNC
4282
      || h->needs_plt)
4283
    {
4284
      if (! info->shared
4285
          && !h->def_dynamic
4286
          && !h->ref_dynamic)
4287
        {
4288
          /* This case can occur if we saw a PLT reloc in an input
4289
             file, but the symbol was never referred to by a dynamic
4290
             object.  In such a case, we don't actually need to build
4291
             a procedure linkage table, and we can just do a REL32
4292
             reloc instead.  */
4293
          BFD_ASSERT (h->needs_plt);
4294
          return TRUE;
4295
        }
4296
 
4297
      /* Make sure this symbol is output as a dynamic symbol.  */
4298
      if (h->dynindx == -1)
4299
        {
4300
          if (! bfd_elf_link_record_dynamic_symbol (info, h))
4301
            return FALSE;
4302
        }
4303
 
4304
      s = bfd_get_section_by_name (dynobj, ".plt");
4305
      BFD_ASSERT (s != NULL);
4306
 
4307
      /* If this is the first .plt entry, make room for the special
4308
         first entry.  */
4309
      if (s->size == 0)
4310
        s->size += elf_mn10300_sizeof_plt0 (info);
4311
 
4312
      /* If this symbol is not defined in a regular file, and we are
4313
         not generating a shared library, then set the symbol to this
4314
         location in the .plt.  This is required to make function
4315
         pointers compare as equal between the normal executable and
4316
         the shared library.  */
4317
      if (! info->shared
4318
          && !h->def_regular)
4319
        {
4320
          h->root.u.def.section = s;
4321
          h->root.u.def.value = s->size;
4322
        }
4323
 
4324
      h->plt.offset = s->size;
4325
 
4326
      /* Make room for this entry.  */
4327
      s->size += elf_mn10300_sizeof_plt (info);
4328
 
4329
      /* We also need to make an entry in the .got.plt section, which
4330
         will be placed in the .got section by the linker script.  */
4331
      s = bfd_get_section_by_name (dynobj, ".got.plt");
4332
      BFD_ASSERT (s != NULL);
4333
      s->size += 4;
4334
 
4335
      /* We also need to make an entry in the .rela.plt section.  */
4336
      s = bfd_get_section_by_name (dynobj, ".rela.plt");
4337
      BFD_ASSERT (s != NULL);
4338
      s->size += sizeof (Elf32_External_Rela);
4339
 
4340
      return TRUE;
4341
    }
4342
 
4343
  /* If this is a weak symbol, and there is a real definition, the
4344
     processor independent code will have arranged for us to see the
4345
     real definition first, and we can just use the same value.  */
4346
  if (h->u.weakdef != NULL)
4347
    {
4348
      BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4349
                  || h->u.weakdef->root.type == bfd_link_hash_defweak);
4350
      h->root.u.def.section = h->u.weakdef->root.u.def.section;
4351
      h->root.u.def.value = h->u.weakdef->root.u.def.value;
4352
      return TRUE;
4353
    }
4354
 
4355
  /* This is a reference to a symbol defined by a dynamic object which
4356
     is not a function.  */
4357
 
4358
  /* If we are creating a shared library, we must presume that the
4359
     only references to the symbol are via the global offset table.
4360
     For such cases we need not do anything here; the relocations will
4361
     be handled correctly by relocate_section.  */
4362
  if (info->shared)
4363
    return TRUE;
4364
 
4365
  /* If there are no references to this symbol that do not use the
4366
     GOT, we don't need to generate a copy reloc.  */
4367
  if (!h->non_got_ref)
4368
    return TRUE;
4369
 
4370
  if (h->size == 0)
4371
    {
4372
      (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4373
                             h->root.root.string);
4374
      return TRUE;
4375
    }
4376
 
4377
  /* We must allocate the symbol in our .dynbss section, which will
4378
     become part of the .bss section of the executable.  There will be
4379
     an entry for this symbol in the .dynsym section.  The dynamic
4380
     object will contain position independent code, so all references
4381
     from the dynamic object to this symbol will go through the global
4382
     offset table.  The dynamic linker will use the .dynsym entry to
4383
     determine the address it must put in the global offset table, so
4384
     both the dynamic object and the regular object will refer to the
4385
     same memory location for the variable.  */
4386
 
4387
  s = bfd_get_section_by_name (dynobj, ".dynbss");
4388
  BFD_ASSERT (s != NULL);
4389
 
4390
  /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4391
     copy the initial value out of the dynamic object and into the
4392
     runtime process image.  We need to remember the offset into the
4393
     .rela.bss section we are going to use.  */
4394
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4395
    {
4396
      asection * srel;
4397
 
4398
      srel = bfd_get_section_by_name (dynobj, ".rela.bss");
4399
      BFD_ASSERT (srel != NULL);
4400
      srel->size += sizeof (Elf32_External_Rela);
4401
      h->needs_copy = 1;
4402
    }
4403
 
4404
  return _bfd_elf_adjust_dynamic_copy (h, s);
4405
}
4406
 
4407
/* Set the sizes of the dynamic sections.  */
4408
 
4409
static bfd_boolean
4410
_bfd_mn10300_elf_size_dynamic_sections (bfd * output_bfd,
4411
                                        struct bfd_link_info * info)
4412
{
4413
  bfd * dynobj;
4414
  asection * s;
4415
  bfd_boolean plt;
4416
  bfd_boolean relocs;
4417
  bfd_boolean reltext;
4418
 
4419
  dynobj = elf_hash_table (info)->dynobj;
4420
  BFD_ASSERT (dynobj != NULL);
4421
 
4422
  if (elf_hash_table (info)->dynamic_sections_created)
4423
    {
4424
      /* Set the contents of the .interp section to the interpreter.  */
4425
      if (info->executable)
4426
        {
4427
          s = bfd_get_section_by_name (dynobj, ".interp");
4428
          BFD_ASSERT (s != NULL);
4429
          s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4430
          s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4431
        }
4432
    }
4433
  else
4434
    {
4435
      /* We may have created entries in the .rela.got section.
4436
         However, if we are not creating the dynamic sections, we will
4437
         not actually use these entries.  Reset the size of .rela.got,
4438
         which will cause it to get stripped from the output file
4439
         below.  */
4440
      s = bfd_get_section_by_name (dynobj, ".rela.got");
4441
      if (s != NULL)
4442
        s->size = 0;
4443
    }
4444
 
4445
  /* The check_relocs and adjust_dynamic_symbol entry points have
4446
     determined the sizes of the various dynamic sections.  Allocate
4447
     memory for them.  */
4448
  plt = FALSE;
4449
  relocs = FALSE;
4450
  reltext = FALSE;
4451
  for (s = dynobj->sections; s != NULL; s = s->next)
4452
    {
4453
      const char * name;
4454
 
4455
      if ((s->flags & SEC_LINKER_CREATED) == 0)
4456
        continue;
4457
 
4458
      /* It's OK to base decisions on the section name, because none
4459
         of the dynobj section names depend upon the input files.  */
4460
      name = bfd_get_section_name (dynobj, s);
4461
 
4462
      if (streq (name, ".plt"))
4463
        {
4464
          /* Remember whether there is a PLT.  */
4465
          plt = s->size != 0;
4466
        }
4467
      else if (CONST_STRNEQ (name, ".rela"))
4468
        {
4469
          if (s->size != 0)
4470
            {
4471
              asection * target;
4472
 
4473
              /* Remember whether there are any reloc sections other
4474
                 than .rela.plt.  */
4475
              if (! streq (name, ".rela.plt"))
4476
                {
4477
                  const char * outname;
4478
 
4479
                  relocs = TRUE;
4480
 
4481
                  /* If this relocation section applies to a read only
4482
                     section, then we probably need a DT_TEXTREL
4483
                     entry.  The entries in the .rela.plt section
4484
                     really apply to the .got section, which we
4485
                     created ourselves and so know is not readonly.  */
4486
                  outname = bfd_get_section_name (output_bfd,
4487
                                                  s->output_section);
4488
                  target = bfd_get_section_by_name (output_bfd, outname + 5);
4489
                  if (target != NULL
4490
                      && (target->flags & SEC_READONLY) != 0
4491
                      && (target->flags & SEC_ALLOC) != 0)
4492
                    reltext = TRUE;
4493
                }
4494
 
4495
              /* We use the reloc_count field as a counter if we need
4496
                 to copy relocs into the output file.  */
4497
              s->reloc_count = 0;
4498
            }
4499
        }
4500
      else if (! CONST_STRNEQ (name, ".got")
4501
               && ! streq (name, ".dynbss"))
4502
        /* It's not one of our sections, so don't allocate space.  */
4503
        continue;
4504
 
4505
      if (s->size == 0)
4506
        {
4507
          /* If we don't need this section, strip it from the
4508
             output file.  This is mostly to handle .rela.bss and
4509
             .rela.plt.  We must create both sections in
4510
             create_dynamic_sections, because they must be created
4511
             before the linker maps input sections to output
4512
             sections.  The linker does that before
4513
             adjust_dynamic_symbol is called, and it is that
4514
             function which decides whether anything needs to go
4515
             into these sections.  */
4516
          s->flags |= SEC_EXCLUDE;
4517
          continue;
4518
        }
4519
 
4520
        if ((s->flags & SEC_HAS_CONTENTS) == 0)
4521
          continue;
4522
 
4523
      /* Allocate memory for the section contents.  We use bfd_zalloc
4524
         here in case unused entries are not reclaimed before the
4525
         section's contents are written out.  This should not happen,
4526
         but this way if it does, we get a R_MN10300_NONE reloc
4527
         instead of garbage.  */
4528
      s->contents = bfd_zalloc (dynobj, s->size);
4529
      if (s->contents == NULL)
4530
        return FALSE;
4531
    }
4532
 
4533
  if (elf_hash_table (info)->dynamic_sections_created)
4534
    {
4535
      /* Add some entries to the .dynamic section.  We fill in the
4536
         values later, in _bfd_mn10300_elf_finish_dynamic_sections,
4537
         but we must add the entries now so that we get the correct
4538
         size for the .dynamic section.  The DT_DEBUG entry is filled
4539
         in by the dynamic linker and used by the debugger.  */
4540
      if (! info->shared)
4541
        {
4542
          if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
4543
            return FALSE;
4544
        }
4545
 
4546
      if (plt)
4547
        {
4548
          if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
4549
              || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4550
              || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
4551
              || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4552
            return FALSE;
4553
        }
4554
 
4555
      if (relocs)
4556
        {
4557
          if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
4558
              || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
4559
              || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
4560
                                              sizeof (Elf32_External_Rela)))
4561
            return FALSE;
4562
        }
4563
 
4564
      if (reltext)
4565
        {
4566
          if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
4567
            return FALSE;
4568
        }
4569
    }
4570
 
4571
  return TRUE;
4572
}
4573
 
4574
/* Finish up dynamic symbol handling.  We set the contents of various
4575
   dynamic sections here.  */
4576
 
4577
static bfd_boolean
4578
_bfd_mn10300_elf_finish_dynamic_symbol (bfd * output_bfd,
4579
                                        struct bfd_link_info * info,
4580
                                        struct elf_link_hash_entry * h,
4581
                                        Elf_Internal_Sym * sym)
4582
{
4583
  bfd * dynobj;
4584
 
4585
  dynobj = elf_hash_table (info)->dynobj;
4586
 
4587
  if (h->plt.offset != (bfd_vma) -1)
4588
    {
4589
      asection *        splt;
4590
      asection *        sgot;
4591
      asection *        srel;
4592
      bfd_vma           plt_index;
4593
      bfd_vma           got_offset;
4594
      Elf_Internal_Rela rel;
4595
 
4596
      /* This symbol has an entry in the procedure linkage table.  Set
4597
         it up.  */
4598
 
4599
      BFD_ASSERT (h->dynindx != -1);
4600
 
4601
      splt = bfd_get_section_by_name (dynobj, ".plt");
4602
      sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4603
      srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4604
      BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
4605
 
4606
      /* Get the index in the procedure linkage table which
4607
         corresponds to this symbol.  This is the index of this symbol
4608
         in all the symbols for which we are making plt entries.  The
4609
         first entry in the procedure linkage table is reserved.  */
4610
      plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
4611
                   / elf_mn10300_sizeof_plt (info));
4612
 
4613
      /* Get the offset into the .got table of the entry that
4614
         corresponds to this function.  Each .got entry is 4 bytes.
4615
         The first three are reserved.  */
4616
      got_offset = (plt_index + 3) * 4;
4617
 
4618
      /* Fill in the entry in the procedure linkage table.  */
4619
      if (! info->shared)
4620
        {
4621
          memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
4622
                  elf_mn10300_sizeof_plt (info));
4623
          bfd_put_32 (output_bfd,
4624
                      (sgot->output_section->vma
4625
                       + sgot->output_offset
4626
                       + got_offset),
4627
                      (splt->contents + h->plt.offset
4628
                       + elf_mn10300_plt_symbol_offset (info)));
4629
 
4630
          bfd_put_32 (output_bfd,
4631
                      (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
4632
                      (splt->contents + h->plt.offset
4633
                       + elf_mn10300_plt_plt0_offset (info)));
4634
        }
4635
      else
4636
        {
4637
          memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
4638
                  elf_mn10300_sizeof_plt (info));
4639
 
4640
          bfd_put_32 (output_bfd, got_offset,
4641
                      (splt->contents + h->plt.offset
4642
                       + elf_mn10300_plt_symbol_offset (info)));
4643
        }
4644
 
4645
      bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4646
                  (splt->contents + h->plt.offset
4647
                   + elf_mn10300_plt_reloc_offset (info)));
4648
 
4649
      /* Fill in the entry in the global offset table.  */
4650
      bfd_put_32 (output_bfd,
4651
                  (splt->output_section->vma
4652
                   + splt->output_offset
4653
                   + h->plt.offset
4654
                   + elf_mn10300_plt_temp_offset (info)),
4655
                  sgot->contents + got_offset);
4656
 
4657
      /* Fill in the entry in the .rela.plt section.  */
4658
      rel.r_offset = (sgot->output_section->vma
4659
                      + sgot->output_offset
4660
                      + got_offset);
4661
      rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
4662
      rel.r_addend = 0;
4663
      bfd_elf32_swap_reloca_out (output_bfd, &rel,
4664
                                 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4665
                                               + plt_index));
4666
 
4667
      if (!h->def_regular)
4668
        /* Mark the symbol as undefined, rather than as defined in
4669
           the .plt section.  Leave the value alone.  */
4670
        sym->st_shndx = SHN_UNDEF;
4671
    }
4672
 
4673
  if (h->got.offset != (bfd_vma) -1)
4674
    {
4675
      asection *        sgot;
4676
      asection *        srel;
4677
      Elf_Internal_Rela rel;
4678
 
4679
      /* This symbol has an entry in the global offset table.  Set it up.  */
4680
      sgot = bfd_get_section_by_name (dynobj, ".got");
4681
      srel = bfd_get_section_by_name (dynobj, ".rela.got");
4682
      BFD_ASSERT (sgot != NULL && srel != NULL);
4683
 
4684
      rel.r_offset = (sgot->output_section->vma
4685
                      + sgot->output_offset
4686
                      + (h->got.offset & ~1));
4687
 
4688
      /* If this is a -Bsymbolic link, and the symbol is defined
4689
         locally, we just want to emit a RELATIVE reloc.  Likewise if
4690
         the symbol was forced to be local because of a version file.
4691
         The entry in the global offset table will already have been
4692
         initialized in the relocate_section function.  */
4693
      if (info->shared
4694
          && (info->symbolic || h->dynindx == -1)
4695
          && h->def_regular)
4696
        {
4697
          rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
4698
          rel.r_addend = (h->root.u.def.value
4699
                          + h->root.u.def.section->output_section->vma
4700
                          + h->root.u.def.section->output_offset);
4701
        }
4702
      else
4703
        {
4704
          bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
4705
          rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
4706
          rel.r_addend = 0;
4707
        }
4708
 
4709
      bfd_elf32_swap_reloca_out (output_bfd, &rel,
4710
                                 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4711
                                               + srel->reloc_count));
4712
      ++ srel->reloc_count;
4713
    }
4714
 
4715
  if (h->needs_copy)
4716
    {
4717
      asection *        s;
4718
      Elf_Internal_Rela rel;
4719
 
4720
      /* This symbol needs a copy reloc.  Set it up.  */
4721
      BFD_ASSERT (h->dynindx != -1
4722
                  && (h->root.type == bfd_link_hash_defined
4723
                      || h->root.type == bfd_link_hash_defweak));
4724
 
4725
      s = bfd_get_section_by_name (h->root.u.def.section->owner,
4726
                                   ".rela.bss");
4727
      BFD_ASSERT (s != NULL);
4728
 
4729
      rel.r_offset = (h->root.u.def.value
4730
                      + h->root.u.def.section->output_section->vma
4731
                      + h->root.u.def.section->output_offset);
4732
      rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
4733
      rel.r_addend = 0;
4734
      bfd_elf32_swap_reloca_out (output_bfd, & rel,
4735
                                 (bfd_byte *) ((Elf32_External_Rela *) s->contents
4736
                                               + s->reloc_count));
4737
      ++ s->reloc_count;
4738
    }
4739
 
4740
  /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
4741
  if (streq (h->root.root.string, "_DYNAMIC")
4742
      || h == elf_hash_table (info)->hgot)
4743
    sym->st_shndx = SHN_ABS;
4744
 
4745
  return TRUE;
4746
}
4747
 
4748
/* Finish up the dynamic sections.  */
4749
 
4750
static bfd_boolean
4751
_bfd_mn10300_elf_finish_dynamic_sections (bfd * output_bfd,
4752
                                          struct bfd_link_info * info)
4753
{
4754
  bfd *      dynobj;
4755
  asection * sgot;
4756
  asection * sdyn;
4757
 
4758
  dynobj = elf_hash_table (info)->dynobj;
4759
 
4760
  sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4761
  BFD_ASSERT (sgot != NULL);
4762
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4763
 
4764
  if (elf_hash_table (info)->dynamic_sections_created)
4765
    {
4766
      asection *           splt;
4767
      Elf32_External_Dyn * dyncon;
4768
      Elf32_External_Dyn * dynconend;
4769
 
4770
      BFD_ASSERT (sdyn != NULL);
4771
 
4772
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
4773
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4774
 
4775
      for (; dyncon < dynconend; dyncon++)
4776
        {
4777
          Elf_Internal_Dyn dyn;
4778
          const char * name;
4779
          asection * s;
4780
 
4781
          bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4782
 
4783
          switch (dyn.d_tag)
4784
            {
4785
            default:
4786
              break;
4787
 
4788
            case DT_PLTGOT:
4789
              name = ".got";
4790
              goto get_vma;
4791
 
4792
            case DT_JMPREL:
4793
              name = ".rela.plt";
4794
            get_vma:
4795
              s = bfd_get_section_by_name (output_bfd, name);
4796
              BFD_ASSERT (s != NULL);
4797
              dyn.d_un.d_ptr = s->vma;
4798
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4799
              break;
4800
 
4801
            case DT_PLTRELSZ:
4802
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4803
              BFD_ASSERT (s != NULL);
4804
              dyn.d_un.d_val = s->size;
4805
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4806
              break;
4807
 
4808
            case DT_RELASZ:
4809
              /* My reading of the SVR4 ABI indicates that the
4810
                 procedure linkage table relocs (DT_JMPREL) should be
4811
                 included in the overall relocs (DT_RELA).  This is
4812
                 what Solaris does.  However, UnixWare can not handle
4813
                 that case.  Therefore, we override the DT_RELASZ entry
4814
                 here to make it not include the JMPREL relocs.  Since
4815
                 the linker script arranges for .rela.plt to follow all
4816
                 other relocation sections, we don't have to worry
4817
                 about changing the DT_RELA entry.  */
4818
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4819
              if (s != NULL)
4820
                dyn.d_un.d_val -= s->size;
4821
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4822
              break;
4823
            }
4824
        }
4825
 
4826
      /* Fill in the first entry in the procedure linkage table.  */
4827
      splt = bfd_get_section_by_name (dynobj, ".plt");
4828
      if (splt && splt->size > 0)
4829
        {
4830
          if (info->shared)
4831
            {
4832
              memcpy (splt->contents, elf_mn10300_pic_plt_entry,
4833
                      elf_mn10300_sizeof_plt (info));
4834
            }
4835
          else
4836
            {
4837
              memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
4838
              bfd_put_32 (output_bfd,
4839
                          sgot->output_section->vma + sgot->output_offset + 4,
4840
                          splt->contents + elf_mn10300_plt0_gotid_offset (info));
4841
              bfd_put_32 (output_bfd,
4842
                          sgot->output_section->vma + sgot->output_offset + 8,
4843
                          splt->contents + elf_mn10300_plt0_linker_offset (info));
4844
            }
4845
 
4846
          /* UnixWare sets the entsize of .plt to 4, although that doesn't
4847
             really seem like the right value.  */
4848
          elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4849
        }
4850
    }
4851
 
4852
  /* Fill in the first three entries in the global offset table.  */
4853
  if (sgot->size > 0)
4854
    {
4855
      if (sdyn == NULL)
4856
        bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4857
      else
4858
        bfd_put_32 (output_bfd,
4859
                    sdyn->output_section->vma + sdyn->output_offset,
4860
                    sgot->contents);
4861
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4862
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4863
    }
4864
 
4865
  elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4866
 
4867
  return TRUE;
4868
}
4869
 
4870
/* Classify relocation types, such that combreloc can sort them
4871
   properly.  */
4872
 
4873
static enum elf_reloc_type_class
4874
_bfd_mn10300_elf_reloc_type_class (const Elf_Internal_Rela *rela)
4875
{
4876
  switch ((int) ELF32_R_TYPE (rela->r_info))
4877
    {
4878
    case R_MN10300_RELATIVE:    return reloc_class_relative;
4879
    case R_MN10300_JMP_SLOT:    return reloc_class_plt;
4880
    case R_MN10300_COPY:        return reloc_class_copy;
4881
    default:                    return reloc_class_normal;
4882
    }
4883
}
4884
 
4885
/* Allocate space for an MN10300 extension to the bfd elf data structure.  */
4886
 
4887
static bfd_boolean
4888
mn10300_elf_mkobject (bfd *abfd)
4889
{
4890
  /* We do not actually need any extra room in the bfd elf data structure.
4891
     But we do need the object_id of the structure to be set to
4892
     MN10300_ELF_DATA so that elflink.c:elf_link_add_object_symols() will call
4893
     our mn10300_elf_check_relocs function which will then allocate space in
4894
     the .got section for any GOT based relocs.  */
4895
  return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
4896
                                  MN10300_ELF_DATA);
4897
}
4898
 
4899
#define bfd_elf32_mkobject      mn10300_elf_mkobject
4900
 
4901
#ifndef ELF_ARCH
4902
#define TARGET_LITTLE_SYM       bfd_elf32_mn10300_vec
4903
#define TARGET_LITTLE_NAME      "elf32-mn10300"
4904
#define ELF_ARCH                bfd_arch_mn10300
4905
#define ELF_TARGET_ID           MN10300_ELF_DATA
4906
#define ELF_MACHINE_CODE        EM_MN10300
4907
#define ELF_MACHINE_ALT1        EM_CYGNUS_MN10300
4908
#define ELF_MAXPAGESIZE         0x1000
4909
#endif
4910
 
4911
#define elf_info_to_howto               mn10300_info_to_howto
4912
#define elf_info_to_howto_rel           0
4913
#define elf_backend_can_gc_sections     1
4914
#define elf_backend_rela_normal         1
4915
#define elf_backend_check_relocs        mn10300_elf_check_relocs
4916
#define elf_backend_gc_mark_hook        mn10300_elf_gc_mark_hook
4917
#define elf_backend_relocate_section    mn10300_elf_relocate_section
4918
#define bfd_elf32_bfd_relax_section     mn10300_elf_relax_section
4919
#define bfd_elf32_bfd_get_relocated_section_contents \
4920
                                mn10300_elf_get_relocated_section_contents
4921
#define bfd_elf32_bfd_link_hash_table_create \
4922
                                elf32_mn10300_link_hash_table_create
4923
#define bfd_elf32_bfd_link_hash_table_free \
4924
                                elf32_mn10300_link_hash_table_free
4925
 
4926
#ifndef elf_symbol_leading_char
4927
#define elf_symbol_leading_char '_'
4928
#endif
4929
 
4930
/* So we can set bits in e_flags.  */
4931
#define elf_backend_final_write_processing \
4932
                                        _bfd_mn10300_elf_final_write_processing
4933
#define elf_backend_object_p            _bfd_mn10300_elf_object_p
4934
 
4935
#define bfd_elf32_bfd_merge_private_bfd_data \
4936
                                        _bfd_mn10300_elf_merge_private_bfd_data
4937
 
4938
#define elf_backend_can_gc_sections     1
4939
#define elf_backend_create_dynamic_sections \
4940
  _bfd_mn10300_elf_create_dynamic_sections
4941
#define elf_backend_adjust_dynamic_symbol \
4942
  _bfd_mn10300_elf_adjust_dynamic_symbol
4943
#define elf_backend_size_dynamic_sections \
4944
  _bfd_mn10300_elf_size_dynamic_sections
4945
#define elf_backend_omit_section_dynsym \
4946
  ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4947
#define elf_backend_finish_dynamic_symbol \
4948
  _bfd_mn10300_elf_finish_dynamic_symbol
4949
#define elf_backend_finish_dynamic_sections \
4950
  _bfd_mn10300_elf_finish_dynamic_sections
4951
 
4952
#define elf_backend_reloc_type_class \
4953
  _bfd_mn10300_elf_reloc_type_class
4954
 
4955
#define elf_backend_want_got_plt        1
4956
#define elf_backend_plt_readonly        1
4957
#define elf_backend_want_plt_sym        0
4958
#define elf_backend_got_header_size     12
4959
 
4960
#include "elf32-target.h"

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