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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [bfd/] [elf32-cris.c] - Blame information for rev 43

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1 14 khays
/* CRIS-specific support for 32-bit ELF.
2
   Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3
   2010  Free Software Foundation, Inc.
4
   Contributed by Axis Communications AB.
5
   Written by Hans-Peter Nilsson, based on elf32-fr30.c
6
   PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7
 
8
   This file is part of BFD, the Binary File Descriptor library.
9
 
10
   This program is free software; you can redistribute it and/or modify
11
   it under the terms of the GNU General Public License as published by
12
   the Free Software Foundation; either version 3 of the License, or
13
   (at your option) any later version.
14
 
15
   This program is distributed in the hope that it will be useful,
16
   but WITHOUT ANY WARRANTY; without even the implied warranty of
17
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18
   GNU General Public License for more details.
19
 
20
   You should have received a copy of the GNU General Public License
21
   along with this program; if not, write to the Free Software
22
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23
   MA 02110-1301, USA.  */
24
 
25
#include "sysdep.h"
26
#include "bfd.h"
27
#include "libbfd.h"
28
#include "elf-bfd.h"
29
#include "elf/cris.h"
30
#include <limits.h>
31
 
32
/* Forward declarations.  */
33
static reloc_howto_type * cris_reloc_type_lookup
34
  PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
35
 
36
static void cris_info_to_howto_rela
37
  PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
38
 
39
static bfd_reloc_status_type cris_elf_pcrel_reloc
40
  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
41
 
42
static bfd_boolean cris_elf_grok_prstatus
43
  PARAMS ((bfd *abfd, Elf_Internal_Note *note));
44
 
45
static bfd_boolean cris_elf_grok_psinfo
46
  PARAMS ((bfd *abfd, Elf_Internal_Note *note));
47
 
48
static bfd_boolean cris_elf_relocate_section
49
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
50
           Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
51
 
52
static bfd_reloc_status_type cris_final_link_relocate
53
  PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
54
           Elf_Internal_Rela *, bfd_vma));
55
 
56
static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
57
 
58
static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
59
 
60
static bfd_boolean cris_elf_set_mach_from_flags
61
  PARAMS ((bfd *, unsigned long int));
62
 
63
static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
64
 
65
static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
66
static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
67
 
68
struct elf_cris_link_hash_entry;
69
static bfd_boolean elf_cris_discard_excess_dso_dynamics
70
  PARAMS ((struct elf_cris_link_hash_entry *, PTR));
71
static bfd_boolean elf_cris_discard_excess_program_dynamics
72
  PARAMS ((struct elf_cris_link_hash_entry *, PTR));
73
static bfd_boolean elf_cris_adjust_gotplt_to_got
74
  PARAMS ((struct elf_cris_link_hash_entry *, PTR));
75
static bfd_boolean elf_cris_try_fold_plt_to_got
76
  PARAMS ((struct elf_cris_link_hash_entry *, PTR));
77
static struct bfd_hash_entry *elf_cris_link_hash_newfunc
78
  PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
79
static struct bfd_link_hash_table *elf_cris_link_hash_table_create
80
  PARAMS ((bfd *));
81
static bfd_boolean elf_cris_adjust_dynamic_symbol
82
  PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
83
static bfd_boolean cris_elf_check_relocs
84
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
85
           const Elf_Internal_Rela *));
86
 
87
static bfd_boolean elf_cris_size_dynamic_sections
88
  PARAMS ((bfd *, struct bfd_link_info *));
89
static bfd_boolean elf_cris_finish_dynamic_symbol
90
  PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
91
           Elf_Internal_Sym *));
92
static bfd_boolean elf_cris_finish_dynamic_sections
93
  PARAMS ((bfd *, struct bfd_link_info *));
94
static void elf_cris_hide_symbol
95
  PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
96
static enum elf_reloc_type_class elf_cris_reloc_type_class
97
  PARAMS ((const Elf_Internal_Rela *));
98
 
99
static reloc_howto_type cris_elf_howto_table [] =
100
{
101
  /* This reloc does nothing.  */
102
  HOWTO (R_CRIS_NONE,           /* type */
103
         0,                      /* rightshift */
104
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
105
         32,                    /* bitsize */
106
         FALSE,                 /* pc_relative */
107
         0,                      /* bitpos */
108
         complain_overflow_bitfield, /* complain_on_overflow */
109
         bfd_elf_generic_reloc, /* special_function */
110
         "R_CRIS_NONE",         /* name */
111
         FALSE,                 /* partial_inplace */
112
         0,                      /* src_mask */
113
         0,                      /* dst_mask */
114
         FALSE),                /* pcrel_offset */
115
 
116
  /* An 8 bit absolute relocation.  */
117
  HOWTO (R_CRIS_8,              /* type */
118
         0,                      /* rightshift */
119
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
120
         8,                     /* bitsize */
121
         FALSE,                 /* pc_relative */
122
         0,                      /* bitpos */
123
         complain_overflow_bitfield, /* complain_on_overflow */
124
         bfd_elf_generic_reloc, /* special_function */
125
         "R_CRIS_8",            /* name */
126
         FALSE,                 /* partial_inplace */
127
         0x0000,                /* src_mask */
128
         0x00ff,                /* dst_mask */
129
         FALSE),                /* pcrel_offset */
130
 
131
  /* A 16 bit absolute relocation.  */
132
  HOWTO (R_CRIS_16,             /* type */
133
         0,                      /* rightshift */
134
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
135
         16,                    /* bitsize */
136
         FALSE,                 /* pc_relative */
137
         0,                      /* bitpos */
138
         complain_overflow_bitfield, /* complain_on_overflow */
139
         bfd_elf_generic_reloc, /* special_function */
140
         "R_CRIS_16",           /* name */
141
         FALSE,                 /* partial_inplace */
142
         0x00000000,            /* src_mask */
143
         0x0000ffff,            /* dst_mask */
144
         FALSE),                /* pcrel_offset */
145
 
146
  /* A 32 bit absolute relocation.  */
147
  HOWTO (R_CRIS_32,             /* type */
148
         0,                      /* rightshift */
149
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
150
         32,                    /* bitsize */
151
         FALSE,                 /* pc_relative */
152
         0,                      /* bitpos */
153
         /* We don't want overflow complaints for 64-bit vma builds
154
            for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
155
            32-bit ELF) where sym=0xc0001234.
156
            Don't do this for the PIC relocs, as we don't expect to
157
            see them with large offsets.  */
158
         complain_overflow_dont, /* complain_on_overflow */
159
         bfd_elf_generic_reloc, /* special_function */
160
         "R_CRIS_32",           /* name */
161
         FALSE,                 /* partial_inplace */
162
         0x00000000,            /* src_mask */
163
         0xffffffff,            /* dst_mask */
164
         FALSE),                /* pcrel_offset */
165
 
166
  /* An 8 bit PC-relative relocation.  */
167
  HOWTO (R_CRIS_8_PCREL,        /* type */
168
         0,                      /* rightshift */
169
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
170
         8,                     /* bitsize */
171
         TRUE,                  /* pc_relative */
172
         0,                      /* bitpos */
173
         complain_overflow_bitfield, /* complain_on_overflow */
174
         cris_elf_pcrel_reloc,  /* special_function */
175
         "R_CRIS_8_PCREL",      /* name */
176
         FALSE,                 /* partial_inplace */
177
         0x0000,                /* src_mask */
178
         0x00ff,                /* dst_mask */
179
         TRUE),                 /* pcrel_offset */
180
 
181
  /* A 16 bit PC-relative relocation.  */
182
  HOWTO (R_CRIS_16_PCREL,       /* type */
183
         0,                      /* rightshift */
184
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
185
         16,                    /* bitsize */
186
         TRUE,                  /* pc_relative */
187
         0,                      /* bitpos */
188
         complain_overflow_bitfield, /* complain_on_overflow */
189
         cris_elf_pcrel_reloc,  /* special_function */
190
         "R_CRIS_16_PCREL",     /* name */
191
         FALSE,                 /* partial_inplace */
192
         0x00000000,            /* src_mask */
193
         0x0000ffff,            /* dst_mask */
194
         TRUE),                 /* pcrel_offset */
195
 
196
  /* A 32 bit PC-relative relocation.  */
197
  HOWTO (R_CRIS_32_PCREL,       /* type */
198
         0,                      /* rightshift */
199
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
200
         32,                    /* bitsize */
201
         TRUE,                  /* pc_relative */
202
         0,                      /* bitpos */
203
         complain_overflow_bitfield, /* complain_on_overflow */
204
         cris_elf_pcrel_reloc,  /* special_function */
205
         "R_CRIS_32_PCREL",     /* name */
206
         FALSE,                 /* partial_inplace */
207
         0x00000000,            /* src_mask */
208
         0xffffffff,            /* dst_mask */
209
         TRUE),                 /* pcrel_offset */
210
 
211
  /* GNU extension to record C++ vtable hierarchy.  */
212
  HOWTO (R_CRIS_GNU_VTINHERIT,  /* type */
213
         0,                      /* rightshift */
214
         2,                     /* 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_CRIS_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_CRIS_GNU_VTENTRY,    /* type */
228
         0,                      /* rightshift */
229
         2,                     /* 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
         _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
235
         "R_CRIS_GNU_VTENTRY",   /* name */
236
         FALSE,                 /* partial_inplace */
237
         0,                      /* src_mask */
238
         0,                      /* dst_mask */
239
         FALSE),                /* pcrel_offset */
240
 
241
  /* This is used only by the dynamic linker.  The symbol should exist
242
     both in the object being run and in some shared library.  The
243
     dynamic linker copies the data addressed by the symbol from the
244
     shared library into the object, because the object being
245
     run has to have the data at some particular address.  */
246
  HOWTO (R_CRIS_COPY,           /* type */
247
         0,                      /* rightshift */
248
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
249
         32,                    /* bitsize */
250
         FALSE,                 /* pc_relative */
251
         0,                      /* bitpos */
252
         complain_overflow_bitfield, /* complain_on_overflow */
253
         bfd_elf_generic_reloc, /* special_function */
254
         "R_CRIS_COPY",         /* name */
255
         FALSE,                 /* partial_inplace */
256
         0,                      /* src_mask */
257
         0,                      /* dst_mask */
258
         FALSE),                /* pcrel_offset */
259
 
260
  /* Like R_CRIS_32, but used when setting global offset table entries.  */
261
  HOWTO (R_CRIS_GLOB_DAT,       /* type */
262
         0,                      /* rightshift */
263
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
264
         32,                    /* bitsize */
265
         FALSE,                 /* pc_relative */
266
         0,                      /* bitpos */
267
         complain_overflow_bitfield, /* complain_on_overflow */
268
         bfd_elf_generic_reloc, /* special_function */
269
         "R_CRIS_GLOB_DAT",     /* name */
270
         FALSE,                 /* partial_inplace */
271
         0,                      /* src_mask */
272
         0xffffffff,            /* dst_mask */
273
         FALSE),                /* pcrel_offset */
274
 
275
  /* Marks a procedure linkage table entry for a symbol.  */
276
  HOWTO (R_CRIS_JUMP_SLOT,      /* type */
277
         0,                      /* rightshift */
278
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
279
         32,                    /* bitsize */
280
         FALSE,                 /* pc_relative */
281
         0,                      /* bitpos */
282
         complain_overflow_bitfield, /* complain_on_overflow */
283
         bfd_elf_generic_reloc, /* special_function */
284
         "R_CRIS_JUMP_SLOT",    /* name */
285
         FALSE,                 /* partial_inplace */
286
         0,                      /* src_mask */
287
         0,                      /* dst_mask */
288
         FALSE),                /* pcrel_offset */
289
 
290
  /* Used only by the dynamic linker.  When the object is run, this
291
     longword is set to the load address of the object, plus the
292
     addend.  */
293
  HOWTO (R_CRIS_RELATIVE,       /* type */
294
         0,                      /* rightshift */
295
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
296
         32,                    /* bitsize */
297
         FALSE,                 /* pc_relative */
298
         0,                      /* bitpos */
299
         complain_overflow_bitfield, /* complain_on_overflow */
300
         bfd_elf_generic_reloc, /* special_function */
301
         "R_CRIS_RELATIVE",     /* name */
302
         FALSE,                 /* partial_inplace */
303
         0,                      /* src_mask */
304
         0xffffffff,            /* dst_mask */
305
         FALSE),                /* pcrel_offset */
306
 
307
  /* Like R_CRIS_32, but referring to the GOT table entry for the symbol.  */
308
  HOWTO (R_CRIS_16_GOT,         /* type */
309
         0,                      /* rightshift */
310
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
311
         16,                    /* bitsize */
312
         FALSE,                 /* pc_relative */
313
         0,                      /* bitpos */
314
         complain_overflow_bitfield, /* complain_on_overflow */
315
         bfd_elf_generic_reloc, /* special_function */
316
         "R_CRIS_16_GOT",       /* name */
317
         FALSE,                 /* partial_inplace */
318
         0,                      /* src_mask */
319
         0xffff,                /* dst_mask */
320
         FALSE),                /* pcrel_offset */
321
 
322
  HOWTO (R_CRIS_32_GOT,         /* type */
323
         0,                      /* rightshift */
324
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
325
         32,                    /* bitsize */
326
         FALSE,                 /* pc_relative */
327
         0,                      /* bitpos */
328
         complain_overflow_bitfield, /* complain_on_overflow */
329
         bfd_elf_generic_reloc, /* special_function */
330
         "R_CRIS_32_GOT",       /* name */
331
         FALSE,                 /* partial_inplace */
332
         0,                      /* src_mask */
333
         0xffffffff,            /* dst_mask */
334
         FALSE),                /* pcrel_offset */
335
 
336
  /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
337
     the GOT table for the symbol.  */
338
  HOWTO (R_CRIS_16_GOTPLT,      /* type */
339
         0,                      /* rightshift */
340
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
341
         16,                    /* bitsize */
342
         FALSE,                 /* pc_relative */
343
         0,                      /* bitpos */
344
         complain_overflow_bitfield, /* complain_on_overflow */
345
         bfd_elf_generic_reloc, /* special_function */
346
         "R_CRIS_16_GOTPLT",    /* name */
347
         FALSE,                 /* partial_inplace */
348
         0,                      /* src_mask */
349
         0xffff,                /* dst_mask */
350
         FALSE),                /* pcrel_offset */
351
 
352
  HOWTO (R_CRIS_32_GOTPLT,      /* type */
353
         0,                      /* rightshift */
354
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
355
         32,                    /* bitsize */
356
         FALSE,                 /* pc_relative */
357
         0,                      /* bitpos */
358
         complain_overflow_bitfield, /* complain_on_overflow */
359
         bfd_elf_generic_reloc, /* special_function */
360
         "R_CRIS_32_GOTPLT",    /* name */
361
         FALSE,                 /* partial_inplace */
362
         0,                      /* src_mask */
363
         0xffffffff,            /* dst_mask */
364
         FALSE),                /* pcrel_offset */
365
 
366
  /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
367
     be necessary.  */
368
  HOWTO (R_CRIS_32_GOTREL,      /* type */
369
         0,                      /* rightshift */
370
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
371
         32,                    /* bitsize */
372
         FALSE,                 /* pc_relative */
373
         0,                      /* bitpos */
374
         complain_overflow_bitfield, /* complain_on_overflow */
375
         bfd_elf_generic_reloc, /* special_function */
376
         "R_CRIS_32_GOTREL",    /* name */
377
         FALSE,                 /* partial_inplace */
378
         0,                      /* src_mask */
379
         0xffffffff,            /* dst_mask */
380
         FALSE),                /* pcrel_offset */
381
 
382
  /* A 32-bit offset from GOT to entry for this symbol in PLT and request
383
     to create PLT entry for symbol.  */
384
  HOWTO (R_CRIS_32_PLT_GOTREL,  /* type */
385
         0,                      /* rightshift */
386
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
387
         32,                    /* bitsize */
388
         FALSE,                 /* pc_relative */
389
         0,                      /* bitpos */
390
         complain_overflow_bitfield, /* complain_on_overflow */
391
         bfd_elf_generic_reloc, /* special_function */
392
         "R_CRIS_32_PLT_GOTREL", /* name */
393
         FALSE,                 /* partial_inplace */
394
         0,                      /* src_mask */
395
         0xffffffff,            /* dst_mask */
396
         FALSE),                /* pcrel_offset */
397
 
398
  /* A 32-bit offset from PC (location after the relocation) + addend to
399
     entry for this symbol in PLT and request to create PLT entry for
400
     symbol.  */
401
  HOWTO (R_CRIS_32_PLT_PCREL,   /* type */
402
         0,                      /* rightshift */
403
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
404
         32,                    /* bitsize */
405
         TRUE,                  /* pc_relative */
406
         0,                      /* bitpos */
407
         complain_overflow_bitfield, /* complain_on_overflow */
408
         cris_elf_pcrel_reloc,  /* special_function */
409
         "R_CRIS_32_PLT_PCREL", /* name */
410
         FALSE,                 /* partial_inplace */
411
         0,                      /* src_mask */
412
         0xffffffff,            /* dst_mask */
413
         TRUE),                 /* pcrel_offset */
414
 
415
  /* We don't handle these in any special manner and cross-format
416
     linking is not supported; just recognize them enough to pass them
417
     around.  FIXME: do the same for most PIC relocs and add sanity
418
     tests to actually refuse gracefully to handle these and PIC
419
     relocs for cross-format linking.  */
420
#define TLSHOWTO32(name) \
421
 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
422
        bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
423
#define TLSHOWTO16X(name, X)         \
424
 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
425
        bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
426
#define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
427
#define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
428
 
429
  TLSHOWTO32 (R_CRIS_32_GOT_GD),
430
  TLSHOWTO16 (R_CRIS_16_GOT_GD),
431
  TLSHOWTO32 (R_CRIS_32_GD),
432
  TLSHOWTO32 (R_CRIS_DTP),
433
  TLSHOWTO32 (R_CRIS_32_DTPREL),
434
  TLSHOWTO16S (R_CRIS_16_DTPREL),
435
  TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
436
  TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
437
  TLSHOWTO32 (R_CRIS_32_TPREL),
438
  TLSHOWTO16S (R_CRIS_16_TPREL),
439
  TLSHOWTO32 (R_CRIS_DTPMOD),
440
  TLSHOWTO32 (R_CRIS_32_IE)
441
};
442
 
443
/* Map BFD reloc types to CRIS ELF reloc types.  */
444
 
445
struct cris_reloc_map
446
{
447
  bfd_reloc_code_real_type bfd_reloc_val;
448
  unsigned int cris_reloc_val;
449
};
450
 
451
static const struct cris_reloc_map cris_reloc_map [] =
452
{
453
  { BFD_RELOC_NONE,             R_CRIS_NONE },
454
  { BFD_RELOC_8,                R_CRIS_8 },
455
  { BFD_RELOC_16,               R_CRIS_16 },
456
  { BFD_RELOC_32,               R_CRIS_32 },
457
  { BFD_RELOC_8_PCREL,          R_CRIS_8_PCREL },
458
  { BFD_RELOC_16_PCREL,         R_CRIS_16_PCREL },
459
  { BFD_RELOC_32_PCREL,         R_CRIS_32_PCREL },
460
  { BFD_RELOC_VTABLE_INHERIT,   R_CRIS_GNU_VTINHERIT },
461
  { BFD_RELOC_VTABLE_ENTRY,     R_CRIS_GNU_VTENTRY },
462
  { BFD_RELOC_CRIS_COPY,        R_CRIS_COPY },
463
  { BFD_RELOC_CRIS_GLOB_DAT,    R_CRIS_GLOB_DAT },
464
  { BFD_RELOC_CRIS_JUMP_SLOT,   R_CRIS_JUMP_SLOT },
465
  { BFD_RELOC_CRIS_RELATIVE,    R_CRIS_RELATIVE },
466
  { BFD_RELOC_CRIS_16_GOT,      R_CRIS_16_GOT },
467
  { BFD_RELOC_CRIS_32_GOT,      R_CRIS_32_GOT },
468
  { BFD_RELOC_CRIS_16_GOTPLT,   R_CRIS_16_GOTPLT },
469
  { BFD_RELOC_CRIS_32_GOTPLT,   R_CRIS_32_GOTPLT },
470
  { BFD_RELOC_CRIS_32_GOTREL,   R_CRIS_32_GOTREL },
471
  { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
472
  { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
473
  { BFD_RELOC_CRIS_32_GOT_GD,   R_CRIS_32_GOT_GD },
474
  { BFD_RELOC_CRIS_16_GOT_GD,   R_CRIS_16_GOT_GD },
475
  { BFD_RELOC_CRIS_32_GD,       R_CRIS_32_GD },
476
  { BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
477
  { BFD_RELOC_CRIS_32_DTPREL,   R_CRIS_32_DTPREL },
478
  { BFD_RELOC_CRIS_16_DTPREL,   R_CRIS_16_DTPREL },
479
  { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
480
  { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
481
  { BFD_RELOC_CRIS_32_TPREL,    R_CRIS_32_TPREL },
482
  { BFD_RELOC_CRIS_16_TPREL,    R_CRIS_16_TPREL },
483
  { BFD_RELOC_CRIS_DTPMOD,      R_CRIS_DTPMOD },
484
  { BFD_RELOC_CRIS_32_IE,       R_CRIS_32_IE }
485
};
486
 
487
static reloc_howto_type *
488
cris_reloc_type_lookup (abfd, code)
489
     bfd * abfd ATTRIBUTE_UNUSED;
490
     bfd_reloc_code_real_type code;
491
{
492
  unsigned int i;
493
 
494
  for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
495
    if (cris_reloc_map [i].bfd_reloc_val == code)
496
      return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
497
 
498
  return NULL;
499
}
500
 
501
static reloc_howto_type *
502
cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
503
{
504
  unsigned int i;
505
 
506
  for (i = 0;
507
       i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
508
       i++)
509
    if (cris_elf_howto_table[i].name != NULL
510
        && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
511
      return &cris_elf_howto_table[i];
512
 
513
  return NULL;
514
}
515
 
516
/* Set the howto pointer for an CRIS ELF reloc.  */
517
 
518
static void
519
cris_info_to_howto_rela (abfd, cache_ptr, dst)
520
     bfd * abfd ATTRIBUTE_UNUSED;
521
     arelent * cache_ptr;
522
     Elf_Internal_Rela * dst;
523
{
524
  enum elf_cris_reloc_type r_type;
525
 
526
  r_type = ELF32_R_TYPE (dst->r_info);
527
  BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
528
  cache_ptr->howto = & cris_elf_howto_table [r_type];
529
}
530
 
531
bfd_reloc_status_type
532
cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
533
                      output_bfd, error_message)
534
     bfd *abfd ATTRIBUTE_UNUSED;
535
     arelent *reloc_entry;
536
     asymbol *symbol;
537
     PTR data ATTRIBUTE_UNUSED;
538
     asection *input_section;
539
     bfd *output_bfd;
540
     char **error_message ATTRIBUTE_UNUSED;
541
{
542
  /* By default (using only bfd_elf_generic_reloc when linking to
543
     non-ELF formats) PC-relative relocs are relative to the beginning
544
     of the reloc.  CRIS PC-relative relocs are relative to the position
545
     *after* the reloc because that's what pre-CRISv32 PC points to
546
     after reading an insn field with that reloc.  (For CRISv32, PC is
547
     actually relative to the start of the insn, but we keep the old
548
     definition.)  Still, we use as much generic machinery as we can.
549
 
550
     Only adjust when doing a final link.  */
551
  if (output_bfd == (bfd *) NULL)
552
    reloc_entry->addend -= 1 << reloc_entry->howto->size;
553
 
554
  return
555
    bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
556
                           input_section, output_bfd, error_message);
557
}
558
 
559
/* Support for core dump NOTE sections.
560
   The slightly unintuitive code layout is an attempt to keep at least
561
   some similarities with other ports, hoping to simplify general
562
   changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart.  */
563
 
564
static bfd_boolean
565
cris_elf_grok_prstatus (abfd, note)
566
     bfd *abfd;
567
     Elf_Internal_Note *note;
568
{
569
  int offset;
570
  size_t size;
571
 
572
  if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
573
    switch (note->descsz)
574
      {
575
      default:
576
        return FALSE;
577
 
578
      case 202:         /* Linux/CRISv32 */
579
        /* pr_cursig */
580
        elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
581
 
582
        /* pr_pid */
583
        elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22);
584
 
585
        /* pr_reg */
586
        offset = 70;
587
        size = 128;
588
 
589
        break;
590
      }
591
  else
592
    switch (note->descsz)
593
      {
594
      default:
595
        return FALSE;
596
 
597
      case 214:         /* Linux/CRIS */
598
        /* pr_cursig */
599
        elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
600
 
601
        /* pr_pid */
602
        elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22);
603
 
604
        /* pr_reg */
605
        offset = 70;
606
        size = 140;
607
 
608
        break;
609
      }
610
 
611
  /* Make a ".reg/999" section.  */
612
  return _bfd_elfcore_make_pseudosection (abfd, ".reg",
613
                                          size, note->descpos + offset);
614
}
615
 
616
static bfd_boolean
617
cris_elf_grok_psinfo (abfd, note)
618
     bfd *abfd;
619
     Elf_Internal_Note *note;
620
{
621
  if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
622
    switch (note->descsz)
623
      {
624
      default:
625
        return FALSE;
626
 
627
      case 124:         /* Linux/CRISv32 elf_prpsinfo */
628
        elf_tdata (abfd)->core_program
629
          = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
630
        elf_tdata (abfd)->core_command
631
          = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
632
      }
633
  else
634
    switch (note->descsz)
635
      {
636
      default:
637
        return FALSE;
638
 
639
      case 124:         /* Linux/CRIS elf_prpsinfo */
640
        elf_tdata (abfd)->core_program
641
          = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
642
        elf_tdata (abfd)->core_command
643
          = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
644
      }
645
 
646
  /* Note that for some reason, a spurious space is tacked
647
     onto the end of the args in some (at least one anyway)
648
     implementations, so strip it off if it exists.  */
649
 
650
  {
651
    char *command = elf_tdata (abfd)->core_command;
652
    int n = strlen (command);
653
 
654
    if (0 < n && command[n - 1] == ' ')
655
      command[n - 1] = '\0';
656
  }
657
 
658
  return TRUE;
659
}
660
 
661
/* The name of the dynamic interpreter.  This is put in the .interp
662
   section.  */
663
 
664
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
665
 
666
/* The size in bytes of an entry in the procedure linkage table.  */
667
 
668
#define PLT_ENTRY_SIZE 20
669
#define PLT_ENTRY_SIZE_V32 26
670
 
671
/* The first entry in an absolute procedure linkage table looks like this.  */
672
 
673
static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
674
{
675
  0xfc, 0xe1,
676
  0x7e, 0x7e,   /* push mof.  */
677
  0x7f, 0x0d,   /*  (dip [pc+]) */
678
  0, 0, 0, 0,       /*  Replaced with address of .got + 4.  */
679
  0x30, 0x7a,   /* move [...],mof */
680
  0x7f, 0x0d,   /*  (dip [pc+]) */
681
  0, 0, 0, 0,       /*  Replaced with address of .got + 8.  */
682
  0x30, 0x09    /* jump [...] */
683
};
684
 
685
static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
686
{
687
  0x84, 0xe2,   /* subq 4,$sp */
688
  0x6f, 0xfe,   /* move.d 0,$acr */
689
  0, 0, 0, 0,       /*  Replaced by address of .got + 4.  */
690
  0x7e, 0x7a,   /* move $mof,[$sp] */
691
  0x3f, 0x7a,   /* move [$acr],$mof */
692
  0x04, 0xf2,   /* addq 4,acr */
693
  0x6f, 0xfa,   /* move.d [$acr],$acr */
694
  0xbf, 0x09,   /* jump $acr */
695
  0xb0, 0x05,   /* nop */
696
  0, 0            /*  Pad out to 26 bytes.  */
697
};
698
 
699
/* Subsequent entries in an absolute procedure linkage table look like
700
   this.  */
701
 
702
static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
703
{
704
  0x7f, 0x0d,   /*  (dip [pc+]) */
705
  0, 0, 0, 0,       /*  Replaced with address of this symbol in .got.  */
706
  0x30, 0x09,   /* jump [...] */
707
  0x3f,  0x7e,  /* move [pc+],mof */
708
  0, 0, 0, 0,       /*  Replaced with offset into relocation table.  */
709
  0x2f, 0xfe,   /* add.d [pc+],pc */
710
  0xec, 0xff,
711
  0xff, 0xff    /*  Replaced with offset to start of .plt.  */
712
};
713
 
714
static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
715
{
716
  0x6f, 0xfe,   /* move.d 0,$acr */
717
  0, 0, 0, 0,       /*  Replaced with address of this symbol in .got.  */
718
  0x6f, 0xfa,   /* move.d [$acr],$acr */
719
  0xbf, 0x09,   /* jump $acr */
720
  0xb0, 0x05,   /* nop */
721
  0x3f, 0x7e,   /* move 0,mof */
722
  0, 0, 0, 0,       /*  Replaced with offset into relocation table. */
723
  0xbf, 0x0e,   /* ba start_of_plt0_entry */
724
  0, 0, 0, 0,       /*  Replaced with offset to plt0 entry.  */
725
  0xb0, 0x05    /* nop */
726
};
727
 
728
/* The first entry in a PIC procedure linkage table looks like this.  */
729
 
730
static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
731
{
732
  0xfc, 0xe1, 0x7e, 0x7e,       /* push mof */
733
  0x04, 0x01, 0x30, 0x7a,       /* move [r0+4],mof */
734
  0x08, 0x01, 0x30, 0x09,       /* jump [r0+8] */
735
  0, 0, 0, 0, 0, 0, 0, 0,       /*  Pad out to 20 bytes.  */
736
};
737
 
738
static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
739
{
740
  0x84, 0xe2,   /* subq 4,$sp */
741
  0x04, 0x01,   /* addoq 4,$r0,$acr */
742
  0x7e, 0x7a,   /* move $mof,[$sp] */
743
  0x3f, 0x7a,   /* move [$acr],$mof */
744
  0x04, 0xf2,   /* addq 4,$acr */
745
  0x6f, 0xfa,   /* move.d [$acr],$acr */
746
  0xbf, 0x09,   /* jump $acr */
747
  0xb0, 0x05,   /* nop */
748
  0, 0,           /*  Pad out to 26 bytes.  */
749
  0, 0, 0, 0,
750
  0, 0, 0, 0
751
};
752
 
753
/* Subsequent entries in a PIC procedure linkage table look like this.  */
754
 
755
static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
756
{
757
  0x6f, 0x0d,   /*  (bdap [pc+].d,r0) */
758
  0, 0, 0, 0,       /*  Replaced with offset of this symbol in .got.  */
759
  0x30, 0x09,   /* jump [...] */
760
  0x3f, 0x7e,   /* move [pc+],mof */
761
  0, 0, 0, 0,       /*  Replaced with offset into relocation table.  */
762
  0x2f, 0xfe,   /* add.d [pc+],pc */
763
  0xec, 0xff,   /*  Replaced with offset to start of .plt.  */
764
  0xff, 0xff
765
};
766
 
767
static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
768
{
769
  0x6f, 0x0d,   /* addo.d 0,$r0,$acr */
770
  0, 0, 0, 0,       /*  Replaced with offset of this symbol in .got.  */
771
  0x6f, 0xfa,   /* move.d [$acr],$acr */
772
  0xbf, 0x09,   /* jump $acr */
773
  0xb0, 0x05,   /* nop */
774
  0x3f, 0x7e,   /* move relocoffs,$mof */
775
  0, 0, 0, 0,       /*  Replaced with offset into relocation table.  */
776
  0xbf, 0x0e,   /* ba start_of_plt */
777
  0, 0, 0, 0,       /*  Replaced with offset to start of .plt.  */
778
  0xb0, 0x05    /* nop */
779
};
780
 
781
/* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
782
   (and most other PIC/shlib stuff).  Check that we don't drift away
783
   without reason.
784
 
785
   The CRIS linker, like the m68k and i386 linkers (and probably the rest
786
   too) needs to keep track of the number of relocs that it decides to
787
   copy in check_relocs for each symbol.  This is so that it can discard
788
   PC relative relocs if it doesn't need them when linking with
789
   -Bsymbolic.  We store the information in a field extending the regular
790
   ELF linker hash table.  */
791
 
792
/* This structure keeps track of the number of PC relative relocs we have
793
   copied for a given symbol.  */
794
 
795
struct elf_cris_pcrel_relocs_copied
796
{
797
  /* Next section.  */
798
  struct elf_cris_pcrel_relocs_copied *next;
799
 
800
  /* A section in dynobj.  */
801
  asection *section;
802
 
803
  /* Number of relocs copied in this section.  */
804
  bfd_size_type count;
805
 
806
  /* Example of reloc being copied, for message.  */
807
  enum elf_cris_reloc_type r_type;
808
};
809
 
810
/* CRIS ELF linker hash entry.  */
811
 
812
struct elf_cris_link_hash_entry
813
{
814
  struct elf_link_hash_entry root;
815
 
816
  /* Number of PC relative relocs copied for this symbol.  */
817
  struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
818
 
819
  /* The GOTPLT references are CRIS-specific; the goal is to avoid having
820
     both a general GOT and a PLT-specific GOT entry for the same symbol,
821
     when it is referenced both as a function and as a function pointer.
822
 
823
     Number of GOTPLT references for a function.  */
824
  bfd_signed_vma gotplt_refcount;
825
 
826
  /* Actual GOTPLT index for this symbol, if applicable, or zero if not
827
     (zero is never used as an index).  FIXME: We should be able to fold
828
     this with gotplt_refcount in a union, like the got and plt unions in
829
     elf_link_hash_entry.  */
830
  bfd_size_type gotplt_offset;
831
 
832
  /* The root.got.refcount is the sum of the regular reference counts
833
     (this) and those members below.  We have to keep a separate count
834
     to track when we've found the first (or last) reference to a
835
     regular got entry.  The offset is in root.got.offset.  */
836
  bfd_signed_vma reg_got_refcount;
837
 
838
  /* Similar to the above, the number of reloc references to this
839
     symbols that need a R_CRIS_32_TPREL slot.  The offset is in
840
     root.got.offset, because this and .dtp_refcount can't validly
841
     happen when there's also a regular GOT entry; that's invalid
842
     input for which an error is emitted.  */
843
  bfd_signed_vma tprel_refcount;
844
 
845
  /* Similar to the above, the number of reloc references to this
846
     symbols that need a R_CRIS_DTP slot.  The offset is in
847
     root.got.offset; plus 4 if .tprel_refcount > 0.  */
848
  bfd_signed_vma dtp_refcount;
849
};
850
 
851
/* The local_got_refcounts and local_got_offsets are a multiple of
852
   LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
853
   refcount for GOT itself, see code), with the summary / group offset
854
   for local symbols located at offset N, reference counts for
855
   ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
856
   relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
857
   3*LSNUM.  */
858
 
859
#define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
860
#define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
861
#define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
862
#define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
863
 
864
/* CRIS ELF linker hash table.  */
865
 
866
struct elf_cris_link_hash_table
867
{
868
  struct elf_link_hash_table root;
869
 
870
  /* We can't use the PLT offset and calculate to get the GOTPLT offset,
871
     since we try and avoid creating GOTPLT:s when there's already a GOT.
872
     Instead, we keep and update the next available index here.  */
873
  bfd_size_type next_gotplt_entry;
874
 
875
  /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
876
     been seen for any input; if != 0, then the constant-offset
877
     R_CRIS_DTPMOD is needed for this DSO/executable.  This turns
878
     negative at relocation, so that we don't need an extra flag for
879
     when the reloc is output.  */
880
  bfd_signed_vma dtpmod_refcount;
881
};
882
 
883
/* Traverse a CRIS ELF linker hash table.  */
884
 
885
#define elf_cris_link_hash_traverse(table, func, info)                  \
886
  (elf_link_hash_traverse                                               \
887
   (&(table)->root,                                                     \
888
    (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func),    \
889
    (info)))
890
 
891
/* Get the CRIS ELF linker hash table from a link_info structure.  */
892
 
893
#define elf_cris_hash_table(p) \
894
  (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
895
  == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
896
 
897
/* Get the CRIS ELF linker hash entry from a regular hash entry (the
898
   "parent class").  The .root reference is just a simple type
899
   check on the argument.  */
900
 
901
#define elf_cris_hash_entry(p) \
902
 ((struct elf_cris_link_hash_entry *) (&(p)->root))
903
 
904
/* Create an entry in a CRIS ELF linker hash table.  */
905
 
906
static struct bfd_hash_entry *
907
elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
908
                            struct bfd_hash_table *table,
909
                            const char *string)
910
{
911
  struct elf_cris_link_hash_entry *ret =
912
    (struct elf_cris_link_hash_entry *) entry;
913
 
914
  /* Allocate the structure if it has not already been allocated by a
915
     subclass.  */
916
  if (ret == (struct elf_cris_link_hash_entry *) NULL)
917
    ret = ((struct elf_cris_link_hash_entry *)
918
           bfd_hash_allocate (table,
919
                              sizeof (struct elf_cris_link_hash_entry)));
920
  if (ret == (struct elf_cris_link_hash_entry *) NULL)
921
    return (struct bfd_hash_entry *) ret;
922
 
923
  /* Call the allocation method of the superclass.  */
924
  ret = ((struct elf_cris_link_hash_entry *)
925
         _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
926
                                     table, string));
927
  if (ret != (struct elf_cris_link_hash_entry *) NULL)
928
    {
929
      ret->pcrel_relocs_copied = NULL;
930
      ret->gotplt_refcount = 0;
931
      ret->gotplt_offset = 0;
932
      ret->dtp_refcount = 0;
933
      ret->tprel_refcount = 0;
934
      ret->reg_got_refcount = 0;
935
    }
936
 
937
  return (struct bfd_hash_entry *) ret;
938
}
939
 
940
/* Create a CRIS ELF linker hash table.  */
941
 
942
static struct bfd_link_hash_table *
943
elf_cris_link_hash_table_create (bfd *abfd)
944
{
945
  struct elf_cris_link_hash_table *ret;
946
  bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
947
 
948
  ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
949
  if (ret == (struct elf_cris_link_hash_table *) NULL)
950
    return NULL;
951
 
952
  if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
953
                                      elf_cris_link_hash_newfunc,
954
                                      sizeof (struct elf_cris_link_hash_entry),
955
                                      CRIS_ELF_DATA))
956
    {
957
      free (ret);
958
      return NULL;
959
    }
960
 
961
  /* Initialize to skip over the first three entries in the gotplt; they
962
     are used for run-time symbol evaluation.  */
963
  ret->next_gotplt_entry = 12;
964
 
965
  /* We haven't seen any R_CRIS_nn_GOT_TPREL initially.  */
966
  ret->dtpmod_refcount = 0;
967
 
968
  return &ret->root.root;
969
}
970
 
971
/* Perform a single relocation.  By default we use the standard BFD
972
   routines, with a few tweaks.  */
973
 
974
static bfd_reloc_status_type
975
cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
976
                          relocation)
977
     reloc_howto_type *  howto;
978
     bfd *               input_bfd;
979
     asection *          input_section;
980
     bfd_byte *          contents;
981
     Elf_Internal_Rela * rel;
982
     bfd_vma             relocation;
983
{
984
  bfd_reloc_status_type r;
985
  enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
986
 
987
  /* PC-relative relocations are relative to the position *after*
988
     the reloc.  Note that for R_CRIS_8_PCREL the adjustment is
989
     not a single byte, since PC must be 16-bit-aligned.  */
990
  switch (r_type)
991
    {
992
      /* Check that the 16-bit GOT relocs are positive.  */
993
    case R_CRIS_16_GOTPLT:
994
    case R_CRIS_16_GOT:
995
      if ((bfd_signed_vma) relocation < 0)
996
        return bfd_reloc_overflow;
997
      break;
998
 
999
    case R_CRIS_32_PLT_PCREL:
1000
    case R_CRIS_32_PCREL:
1001
      relocation -= 2;
1002
      /* Fall through.  */
1003
    case R_CRIS_8_PCREL:
1004
    case R_CRIS_16_PCREL:
1005
      relocation -= 2;
1006
      break;
1007
 
1008
    default:
1009
      break;
1010
    }
1011
 
1012
  r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1013
                                contents, rel->r_offset,
1014
                                relocation, rel->r_addend);
1015
  return r;
1016
}
1017
 
1018
 
1019
/* The number of errors left before we stop outputting reloc-specific
1020
   explanatory messages.  By coincidence, this works nicely together
1021
   with the default number of messages you'll get from LD about
1022
   "relocation truncated to fit" messages before you get an
1023
   "additional relocation overflows omitted from the output".  */
1024
static int additional_relocation_error_msg_count = 10;
1025
 
1026
/* Relocate an CRIS ELF section.  See elf32-fr30.c, from where this was
1027
   copied, for further comments.  */
1028
 
1029
static bfd_boolean
1030
cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
1031
                           struct bfd_link_info *info,
1032
                           bfd *input_bfd,
1033
                           asection *input_section,
1034
                           bfd_byte *contents,
1035
                           Elf_Internal_Rela *relocs,
1036
                           Elf_Internal_Sym *local_syms,
1037
                           asection **local_sections)
1038
{
1039
  struct elf_cris_link_hash_table * htab;
1040
  bfd *dynobj;
1041
  Elf_Internal_Shdr *symtab_hdr;
1042
  struct elf_link_hash_entry **sym_hashes;
1043
  bfd_vma *local_got_offsets;
1044
  asection *sgot;
1045
  asection *splt;
1046
  asection *sreloc;
1047
  Elf_Internal_Rela *rel;
1048
  Elf_Internal_Rela *relend;
1049
  asection *srelgot;
1050
 
1051
  htab = elf_cris_hash_table (info);
1052
  if (htab == NULL)
1053
    return FALSE;
1054
 
1055
  dynobj = elf_hash_table (info)->dynobj;
1056
  local_got_offsets = elf_local_got_offsets (input_bfd);
1057
  symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1058
  sym_hashes = elf_sym_hashes (input_bfd);
1059
  relend     = relocs + input_section->reloc_count;
1060
 
1061
  sgot = NULL;
1062
  splt = NULL;
1063
  sreloc = NULL;
1064
  srelgot = NULL;
1065
 
1066
  if (dynobj != NULL)
1067
    {
1068
      splt = bfd_get_section_by_name (dynobj, ".plt");
1069
      sgot = bfd_get_section_by_name (dynobj, ".got");
1070
    }
1071
 
1072
  for (rel = relocs; rel < relend; rel ++)
1073
    {
1074
      reloc_howto_type *howto;
1075
      unsigned long r_symndx;
1076
      Elf_Internal_Sym *sym;
1077
      asection *sec;
1078
      struct elf_link_hash_entry *h;
1079
      bfd_vma relocation;
1080
      bfd_reloc_status_type r;
1081
      const char *symname = NULL;
1082
      enum elf_cris_reloc_type r_type;
1083
 
1084
      r_type = ELF32_R_TYPE (rel->r_info);
1085
 
1086
      if (   r_type == R_CRIS_GNU_VTINHERIT
1087
          || r_type == R_CRIS_GNU_VTENTRY)
1088
        continue;
1089
 
1090
      r_symndx = ELF32_R_SYM (rel->r_info);
1091
      howto  = cris_elf_howto_table + r_type;
1092
      h      = NULL;
1093
      sym    = NULL;
1094
      sec    = NULL;
1095
 
1096
      if (r_symndx < symtab_hdr->sh_info)
1097
        {
1098
          sym = local_syms + r_symndx;
1099
          sec = local_sections [r_symndx];
1100
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1101
 
1102
          symname = (bfd_elf_string_from_elf_section
1103
                     (input_bfd, symtab_hdr->sh_link, sym->st_name));
1104
          if (symname == NULL)
1105
            symname = bfd_section_name (input_bfd, sec);
1106
        }
1107
      else
1108
        {
1109
          bfd_boolean warned;
1110
          bfd_boolean unresolved_reloc;
1111
 
1112
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1113
                                   r_symndx, symtab_hdr, sym_hashes,
1114
                                   h, sec, relocation,
1115
                                   unresolved_reloc, warned);
1116
 
1117
          symname = h->root.root.string;
1118
 
1119
          if (unresolved_reloc
1120
              /* Perhaps we should detect the cases that
1121
                 sec->output_section is expected to be NULL like i386 and
1122
                 m68k, but apparently (and according to elfxx-ia64.c) all
1123
                 valid cases are where the symbol is defined in a shared
1124
                 object which we link dynamically against.  This includes
1125
                 PLT relocs for which we've created a PLT entry and other
1126
                 relocs for which we're prepared to create dynamic
1127
                 relocations.
1128
 
1129
                 For now, new situations cause us to just err when
1130
                 sec->output_offset is NULL but the object with the symbol
1131
                 is *not* dynamically linked against.  Thus this will
1132
                 automatically remind us so we can see if there are other
1133
                 valid cases we need to revisit.  */
1134
              && (sec->owner->flags & DYNAMIC) != 0)
1135
            relocation = 0;
1136
 
1137
          else if (h->root.type == bfd_link_hash_defined
1138
                   || h->root.type == bfd_link_hash_defweak)
1139
            {
1140
              /* Here follow the cases where the relocation value must
1141
                 be zero (or when further handling is simplified when
1142
                 zero).  I can't claim to understand the various
1143
                 conditions and they weren't described in the files
1144
                 where I copied them from (elf32-m68k.c and
1145
                 elf32-i386.c), but let's mention examples of where
1146
                 they happen.  FIXME: Perhaps define and use a
1147
                 dynamic_symbol_p function like ia64.
1148
 
1149
                 - When creating a shared library, we can have an
1150
                 ordinary relocation for a symbol defined in a shared
1151
                 library (perhaps the one we create).  We then make
1152
                 the relocation value zero, as the value seen now will
1153
                 be added into the relocation addend in this shared
1154
                 library, but must be handled only at dynamic-link
1155
                 time.  FIXME: Not sure this example covers the
1156
                 h->elf_link_hash_flags test, though it's there in
1157
                 other targets.  */
1158
              if (info->shared
1159
                  && ((! info->symbolic && h->dynindx != -1)
1160
                      || !h->def_regular)
1161
                  && (input_section->flags & SEC_ALLOC) != 0
1162
                  && (r_type == R_CRIS_8
1163
                      || r_type == R_CRIS_16
1164
                      || r_type == R_CRIS_32
1165
                      || r_type == R_CRIS_8_PCREL
1166
                      || r_type == R_CRIS_16_PCREL
1167
                      || r_type == R_CRIS_32_PCREL))
1168
                relocation = 0;
1169
              else if (!info->relocatable && unresolved_reloc)
1170
                {
1171
                  _bfd_error_handler
1172
                    (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1173
                     input_bfd,
1174
                     input_section,
1175
                     cris_elf_howto_table[r_type].name,
1176
                     symname);
1177
                  bfd_set_error (bfd_error_bad_value);
1178
                  return FALSE;
1179
                }
1180
            }
1181
        }
1182
 
1183
      if (sec != NULL && elf_discarded_section (sec))
1184
        RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1185
                                         rel, relend, howto, contents);
1186
 
1187
      if (info->relocatable)
1188
        continue;
1189
 
1190
      switch (r_type)
1191
        {
1192
        case R_CRIS_16_GOTPLT:
1193
        case R_CRIS_32_GOTPLT:
1194
          /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1195
             but we require a PLT, and the PLT handling will take care of
1196
             filling in the PLT-specific GOT entry.  For the GOT offset,
1197
             calculate it as we do when filling it in for the .got.plt
1198
             section.  If we don't have a PLT, punt to GOT handling.  */
1199
          if (h != NULL
1200
              && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1201
            {
1202
              asection *sgotplt
1203
                = bfd_get_section_by_name (dynobj, ".got.plt");
1204
              bfd_vma got_offset;
1205
 
1206
              BFD_ASSERT (h->dynindx != -1);
1207
              BFD_ASSERT (sgotplt != NULL);
1208
 
1209
              got_offset
1210
                = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1211
 
1212
              relocation = got_offset;
1213
              break;
1214
            }
1215
 
1216
          /* We didn't make a PLT entry for this symbol.  Maybe everything is
1217
             folded into the GOT.  Other than folding, this happens when
1218
             statically linking PIC code, or when using -Bsymbolic.  Check
1219
             that we instead have a GOT entry as done for us by
1220
             elf_cris_adjust_dynamic_symbol, and drop through into the
1221
             ordinary GOT cases.  This must not happen for the
1222
             executable, because any reference it does to a function
1223
             that is satisfied by a DSO must generate a PLT.  We assume
1224
             these call-specific relocs don't address non-functions.  */
1225
          if (h != NULL
1226
              && (h->got.offset == (bfd_vma) -1
1227
                  || (!info->shared
1228
                      && !(h->def_regular
1229
                           || (!h->def_dynamic
1230
                               && h->root.type == bfd_link_hash_undefweak)))))
1231
            {
1232
              (*_bfd_error_handler)
1233
                ((h->got.offset == (bfd_vma) -1)
1234
                 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1235
                     " against symbol `%s'")
1236
                 : _("%B, section %A: No PLT for relocation %s"
1237
                     " against symbol `%s'"),
1238
                 input_bfd,
1239
                 input_section,
1240
                 cris_elf_howto_table[r_type].name,
1241
                 (symname != NULL && symname[0] != '\0'
1242
                  ? symname : _("[whose name is lost]")));
1243
 
1244
              /* FIXME: Perhaps blaming input is not the right thing to
1245
                 do; this is probably an internal error.  But it is true
1246
                 that we didn't like that particular input.  */
1247
              bfd_set_error (bfd_error_bad_value);
1248
              return FALSE;
1249
            }
1250
          /* Fall through.  */
1251
 
1252
          /* The size of the actual relocation is not used here; we only
1253
             fill in the GOT table here.  */
1254
        case R_CRIS_16_GOT:
1255
        case R_CRIS_32_GOT:
1256
          {
1257
            bfd_vma off;
1258
 
1259
            /* Note that despite using RELA relocations, the .got contents
1260
               is always filled in with the link-relative relocation
1261
               value; the addend.  */
1262
 
1263
            if (h != NULL)
1264
              {
1265
                off = h->got.offset;
1266
                BFD_ASSERT (off != (bfd_vma) -1);
1267
 
1268
                if (!elf_hash_table (info)->dynamic_sections_created
1269
                    || (! info->shared
1270
                        && (h->def_regular
1271
                            || h->type == STT_FUNC
1272
                            || h->needs_plt))
1273
                    || (info->shared
1274
                        && (info->symbolic || h->dynindx == -1)
1275
                        && h->def_regular))
1276
                  {
1277
                    /* This wasn't checked above for ! info->shared, but
1278
                       must hold there if we get here; the symbol must
1279
                       be defined in the regular program or be undefweak
1280
                       or be a function or otherwise need a PLT.  */
1281
                    BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1282
                                || info->shared
1283
                                || h->def_regular
1284
                                || h->type == STT_FUNC
1285
                                || h->needs_plt
1286
                                || h->root.type == bfd_link_hash_undefweak);
1287
 
1288
                    /* This is actually a static link, or it is a
1289
                       -Bsymbolic link and the symbol is defined locally,
1290
                       or is undefweak, or the symbol was forced to be
1291
                       local because of a version file, or we're not
1292
                       creating a dynamic object.  We must initialize this
1293
                       entry in the global offset table.  Since the offset
1294
                       must always be a multiple of 4, we use the least
1295
                       significant bit to record whether we have
1296
                       initialized it already.
1297
 
1298
                       If this GOT entry should be runtime-initialized, we
1299
                       will create a .rela.got relocation entry to
1300
                       initialize the value.  This is done in the
1301
                       finish_dynamic_symbol routine.  */
1302
                    if ((off & 1) != 0)
1303
                      off &= ~1;
1304
                    else
1305
                      {
1306
                        bfd_put_32 (output_bfd, relocation,
1307
                                    sgot->contents + off);
1308
                        h->got.offset |= 1;
1309
                      }
1310
                  }
1311
              }
1312
            else
1313
              {
1314
                BFD_ASSERT (local_got_offsets != NULL
1315
                            && local_got_offsets[r_symndx] != (bfd_vma) -1);
1316
 
1317
                off = local_got_offsets[r_symndx];
1318
 
1319
                /* The offset must always be a multiple of 4.  We use
1320
                   the least significant bit to record whether we have
1321
                   already generated the necessary reloc.  */
1322
                if ((off & 1) != 0)
1323
                  off &= ~1;
1324
                else
1325
                  {
1326
                    bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1327
 
1328
                    if (info->shared)
1329
                      {
1330
                        Elf_Internal_Rela outrel;
1331
                        bfd_byte *loc;
1332
 
1333
                        if (srelgot == NULL)
1334
                          srelgot
1335
                            = bfd_get_section_by_name (dynobj, ".rela.got");
1336
                        BFD_ASSERT (srelgot != NULL);
1337
 
1338
                        outrel.r_offset = (sgot->output_section->vma
1339
                                           + sgot->output_offset
1340
                                           + off);
1341
                        outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1342
                        outrel.r_addend = relocation;
1343
                        loc = srelgot->contents;
1344
                        loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1345
                        bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1346
                      }
1347
 
1348
                    local_got_offsets[r_symndx] |= 1;
1349
                  }
1350
              }
1351
 
1352
            relocation = sgot->output_offset + off;
1353
            if (rel->r_addend != 0)
1354
              {
1355
                /* We can't do anything for a relocation which is against
1356
                   a symbol *plus offset*.  GOT holds relocations for
1357
                   symbols.  Make this an error; the compiler isn't
1358
                   allowed to pass us these kinds of things.  */
1359
                if (h == NULL)
1360
                  (*_bfd_error_handler)
1361
                    (_("%B, section %A: relocation %s with non-zero addend %d"
1362
                       " against local symbol"),
1363
                     input_bfd,
1364
                     input_section,
1365
                     cris_elf_howto_table[r_type].name,
1366
                     rel->r_addend);
1367
                else
1368
                  (*_bfd_error_handler)
1369
                    (_("%B, section %A: relocation %s with non-zero addend %d"
1370
                       " against symbol `%s'"),
1371
                     input_bfd,
1372
                     input_section,
1373
                     cris_elf_howto_table[r_type].name,
1374
                     rel->r_addend,
1375
                     symname[0] != '\0' ? symname : _("[whose name is lost]"));
1376
 
1377
                bfd_set_error (bfd_error_bad_value);
1378
                return FALSE;
1379
              }
1380
          }
1381
          break;
1382
 
1383
        case R_CRIS_32_GOTREL:
1384
          /* This relocation must only be performed against local symbols.
1385
             It's also ok when we link a program and the symbol is either
1386
             defined in an ordinary (non-DSO) object or is undefined weak.  */
1387
          if (h != NULL
1388
              && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1389
              && !(!info->shared
1390
                   && (h->def_regular
1391
                       || (!h->def_dynamic
1392
                           && h->root.type == bfd_link_hash_undefweak))))
1393
            {
1394
              (*_bfd_error_handler)
1395
                (_("%B, section %A: relocation %s is"
1396
                   " not allowed for global symbol: `%s'"),
1397
                 input_bfd,
1398
                 input_section,
1399
                 cris_elf_howto_table[r_type].name,
1400
                 symname);
1401
              bfd_set_error (bfd_error_bad_value);
1402
              return FALSE;
1403
            }
1404
 
1405
          /* This can happen if we get a link error with the input ELF
1406
             variant mismatching the output variant.  Emit an error so
1407
             it's noticed if it happens elsewhere.  */
1408
          if (sgot == NULL)
1409
            {
1410
              (*_bfd_error_handler)
1411
                (_("%B, section %A: relocation %s with no GOT created"),
1412
                 input_bfd,
1413
                 input_section,
1414
                 cris_elf_howto_table[r_type].name);
1415
              bfd_set_error (bfd_error_bad_value);
1416
              return FALSE;
1417
            }
1418
 
1419
          /* This relocation is like a PC-relative one, except the
1420
             reference point is the location of GOT.  Note that
1421
             sgot->output_offset is not involved in this calculation.  We
1422
             always want the start of entire .got section, not the
1423
             position after the reserved header.  */
1424
          relocation -= sgot->output_section->vma;
1425
          break;
1426
 
1427
        case R_CRIS_32_PLT_PCREL:
1428
          /* Relocation is to the entry for this symbol in the
1429
             procedure linkage table.  */
1430
 
1431
          /* Resolve a PLT_PCREL reloc against a local symbol directly,
1432
             without using the procedure linkage table.  */
1433
          if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1434
            break;
1435
 
1436
          if (h->plt.offset == (bfd_vma) -1
1437
              || splt == NULL)
1438
            {
1439
              /* We didn't make a PLT entry for this symbol.  This
1440
                 happens when statically linking PIC code, or when
1441
                 using -Bsymbolic.  */
1442
              break;
1443
            }
1444
 
1445
          relocation = (splt->output_section->vma
1446
                        + splt->output_offset
1447
                        + h->plt.offset);
1448
          break;
1449
 
1450
        case R_CRIS_32_PLT_GOTREL:
1451
          /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1452
             start of the .got section.  See also comment at
1453
             R_CRIS_32_GOT.  */
1454
          relocation -= sgot->output_section->vma;
1455
 
1456
          /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1457
             without using the procedure linkage table.  */
1458
          if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1459
            break;
1460
 
1461
          if (h->plt.offset == (bfd_vma) -1
1462
              || splt == NULL)
1463
            {
1464
              /* We didn't make a PLT entry for this symbol.  This
1465
                 happens when statically linking PIC code, or when
1466
                 using -Bsymbolic.  */
1467
              break;
1468
            }
1469
 
1470
          relocation = (splt->output_section->vma
1471
                        + splt->output_offset
1472
                        + h->plt.offset
1473
                        - sgot->output_section->vma);
1474
          break;
1475
 
1476
        case R_CRIS_8_PCREL:
1477
        case R_CRIS_16_PCREL:
1478
        case R_CRIS_32_PCREL:
1479
          /* If the symbol was local, we need no shlib-specific handling.  */
1480
          if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1481
              || h->dynindx == -1)
1482
            break;
1483
 
1484
          /* Fall through.  */
1485
        case R_CRIS_8:
1486
        case R_CRIS_16:
1487
        case R_CRIS_32:
1488
          if (info->shared
1489
              && r_symndx != STN_UNDEF
1490
              && (input_section->flags & SEC_ALLOC) != 0
1491
              && ((r_type != R_CRIS_8_PCREL
1492
                   && r_type != R_CRIS_16_PCREL
1493
                   && r_type != R_CRIS_32_PCREL)
1494
                  || (!info->symbolic
1495
                      || (h != NULL && !h->def_regular))))
1496
            {
1497
              Elf_Internal_Rela outrel;
1498
              bfd_byte *loc;
1499
              bfd_boolean skip, relocate;
1500
 
1501
              /* When generating a shared object, these relocations
1502
                 are copied into the output file to be resolved at run
1503
                 time.  */
1504
 
1505
              if (sreloc == NULL)
1506
                {
1507
                  sreloc = _bfd_elf_get_dynamic_reloc_section
1508
                    (dynobj, input_section, /*rela?*/ TRUE);
1509
                  /* The section should have been created in cris_elf_check_relocs,
1510
                     but that function will not be called for objects which fail in
1511
                     cris_elf_merge_private_bfd_data.  */
1512
                  if (sreloc == NULL)
1513
                    {
1514
                      bfd_set_error (bfd_error_bad_value);
1515
                      return FALSE;
1516
                    }
1517
                }
1518
 
1519
              skip = FALSE;
1520
              relocate = FALSE;
1521
 
1522
              outrel.r_offset =
1523
                _bfd_elf_section_offset (output_bfd, info, input_section,
1524
                                         rel->r_offset);
1525
              if (outrel.r_offset == (bfd_vma) -1)
1526
                skip = TRUE;
1527
              else if (outrel.r_offset == (bfd_vma) -2
1528
                       /* For now, undefined weak symbols with non-default
1529
                          visibility (yielding 0), like exception info for
1530
                          discarded sections, will get a R_CRIS_NONE
1531
                          relocation rather than no relocation, because we
1532
                          notice too late that the symbol doesn't need a
1533
                          relocation.  */
1534
                       || (h != NULL
1535
                           && h->root.type == bfd_link_hash_undefweak
1536
                           && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1537
                skip = TRUE, relocate = TRUE;
1538
              outrel.r_offset += (input_section->output_section->vma
1539
                                  + input_section->output_offset);
1540
 
1541
              if (skip)
1542
                memset (&outrel, 0, sizeof outrel);
1543
              /* h->dynindx may be -1 if the symbol was marked to
1544
                 become local.  */
1545
              else if (h != NULL
1546
                       && ((! info->symbolic && h->dynindx != -1)
1547
                           || !h->def_regular))
1548
                {
1549
                  BFD_ASSERT (h->dynindx != -1);
1550
                  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1551
                  outrel.r_addend = relocation + rel->r_addend;
1552
                }
1553
              else
1554
                {
1555
                  outrel.r_addend = relocation + rel->r_addend;
1556
 
1557
                  if (r_type == R_CRIS_32)
1558
                    {
1559
                      relocate = TRUE;
1560
                      outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1561
                    }
1562
                  else
1563
                    {
1564
                      long indx;
1565
 
1566
                      if (bfd_is_abs_section (sec))
1567
                        indx = 0;
1568
                      else if (sec == NULL || sec->owner == NULL)
1569
                        {
1570
                          bfd_set_error (bfd_error_bad_value);
1571
                          return FALSE;
1572
                        }
1573
                      else
1574
                        {
1575
                          asection *osec;
1576
 
1577
                          /* We are turning this relocation into one
1578
                             against a section symbol.  It would be
1579
                             proper to subtract the symbol's value,
1580
                             osec->vma, from the emitted reloc addend,
1581
                             but ld.so expects buggy relocs.  */
1582
                          osec = sec->output_section;
1583
                          indx = elf_section_data (osec)->dynindx;
1584
                          if (indx == 0)
1585
                            {
1586
                              osec = htab->root.text_index_section;
1587
                              indx = elf_section_data (osec)->dynindx;
1588
                            }
1589
                          BFD_ASSERT (indx != 0);
1590
                        }
1591
 
1592
                      outrel.r_info = ELF32_R_INFO (indx, r_type);
1593
                    }
1594
                }
1595
 
1596
              loc = sreloc->contents;
1597
              loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1598
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1599
 
1600
              /* This reloc will be computed at runtime, so there's no
1601
                 need to do anything now, except for R_CRIS_32 relocations
1602
                 that have been turned into R_CRIS_RELATIVE.  */
1603
              if (!relocate)
1604
                continue;
1605
            }
1606
 
1607
          break;
1608
 
1609
        case R_CRIS_16_DTPREL:
1610
        case R_CRIS_32_DTPREL:
1611
          /* This relocation must only be performed against local
1612
             symbols, or to sections that are not loadable.  It's also
1613
             ok when we link a program and the symbol is defined in an
1614
             ordinary (non-DSO) object (if it's undefined there, we've
1615
             already seen an error).  */
1616
          if (h != NULL
1617
              && (input_section->flags & SEC_ALLOC) != 0
1618
              && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1619
              && (info->shared
1620
                  || (!h->def_regular
1621
                      && h->root.type != bfd_link_hash_undefined)))
1622
            {
1623
              (*_bfd_error_handler)
1624
                ((h->root.type == bfd_link_hash_undefined)
1625
                 /* We shouldn't get here for GCC-emitted code.  */
1626
                 ? _("%B, section %A: relocation %s has an undefined"
1627
                     " reference to `%s', perhaps a declaration mixup?")
1628
                 : ("%B, section %A: relocation %s is"
1629
                     " not allowed for `%s', a global symbol with default"
1630
                     " visibility, perhaps a declaration mixup?"),
1631
                 input_bfd,
1632
                 input_section,
1633
                 cris_elf_howto_table[r_type].name,
1634
                 symname != NULL && symname[0] != '\0'
1635
                 ? symname : _("[whose name is lost]"));
1636
              bfd_set_error (bfd_error_bad_value);
1637
              return FALSE;
1638
            }
1639
 
1640
          BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1641
                      || htab->dtpmod_refcount != 0);
1642
 
1643
          /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1644
             already done so.  Note that we do this in .got.plt, not
1645
             in .got, as .got.plt contains the first part, still the
1646
             reloc is against .got, because the linker script directs
1647
             (is required to direct) them both into .got.  */
1648
          if (htab->dtpmod_refcount > 0
1649
              && (input_section->flags & SEC_ALLOC) != 0)
1650
            {
1651
              asection *sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1652
              BFD_ASSERT (sgotplt != NULL);
1653
 
1654
              if (info->shared)
1655
                {
1656
                  Elf_Internal_Rela outrel;
1657
                  bfd_byte *loc;
1658
 
1659
                  if (srelgot == NULL)
1660
                    srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1661
                  BFD_ASSERT (srelgot != NULL);
1662
                  loc = srelgot->contents;
1663
                  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1664
 
1665
                  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1666
                  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1667
                  outrel.r_offset = (sgotplt->output_section->vma
1668
                                     + sgotplt->output_offset
1669
                                     + 12);
1670
                  outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1671
                  outrel.r_addend = 0;
1672
                  bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1673
                }
1674
              else
1675
                {
1676
                  /* For an executable, the GOT entry contents is known.  */
1677
                  bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1678
                  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1679
                }
1680
 
1681
              /* Reverse the sign to mark that we've emitted the
1682
                 required GOT entry.  */
1683
              htab->dtpmod_refcount = - htab->dtpmod_refcount;
1684
            }
1685
 
1686
          /* The relocation is the offset from the start of the module
1687
             TLS block to the (local) symbol.  */
1688
          relocation -= elf_hash_table (info)->tls_sec == NULL
1689
            ? 0 : elf_hash_table (info)->tls_sec->vma;
1690
          break;
1691
 
1692
        case R_CRIS_32_GD:
1693
          if (info->shared)
1694
            {
1695
              bfd_set_error (bfd_error_invalid_operation);
1696
 
1697
              /* We've already informed in cris_elf_check_relocs that
1698
                 this is an error.  */
1699
              return FALSE;
1700
            }
1701
          /* Fall through.  */
1702
 
1703
        case R_CRIS_16_GOT_GD:
1704
        case R_CRIS_32_GOT_GD:
1705
          if (rel->r_addend != 0)
1706
            {
1707
              /* We can't do anything for a relocation which is against a
1708
                 symbol *plus offset*.  The GOT holds relocations for
1709
                 symbols.  Make this an error; the compiler isn't allowed
1710
                 to pass us these kinds of things.  */
1711
              (*_bfd_error_handler)
1712
                (_("%B, section %A: relocation %s with non-zero addend %d"
1713
                   " against symbol `%s'"),
1714
                 input_bfd,
1715
                 input_section,
1716
                 cris_elf_howto_table[r_type].name,
1717
                 rel->r_addend,
1718
                 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1719
 
1720
              bfd_set_error (bfd_error_bad_value);
1721
              return FALSE;
1722
            }
1723
 
1724
          if (!info->shared
1725
              && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1726
            {
1727
              /* Known contents of the GOT.  */
1728
              bfd_vma off;
1729
 
1730
              /* The symbol is defined in the program, so just write
1731
                 (1, known_tpoffset) into the GOT.  */
1732
              relocation -= elf_hash_table (info)->tls_sec->vma;
1733
 
1734
              if (h != NULL)
1735
                {
1736
                  off = elf_cris_hash_entry (h)->tprel_refcount > 0
1737
                    ? h->got.offset + 4 : h->got.offset;
1738
                }
1739
              else
1740
                {
1741
                  off = local_got_offsets[r_symndx];
1742
                  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1743
                    off += 4;
1744
                }
1745
 
1746
              /* We use bit 1 of the offset as a flag for GOT entry with
1747
                 the R_CRIS_DTP reloc, setting it when we've emitted the
1748
                 GOT entry and reloc.  Bit 0 is used for R_CRIS_32_TPREL
1749
                 relocs.  */
1750
              if ((off & 2) == 0)
1751
                {
1752
                  off &= ~3;
1753
 
1754
                  if (h != NULL)
1755
                    h->got.offset |= 2;
1756
                  else
1757
                    local_got_offsets[r_symndx] |= 2;
1758
 
1759
                  bfd_put_32 (output_bfd, 1, sgot->contents + off);
1760
                  bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1761
                }
1762
              else
1763
                off &= ~3;
1764
 
1765
              relocation = sgot->output_offset + off
1766
                + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1767
            }
1768
          else
1769
            {
1770
              /* Not all parts of the GOT entry are known; emit a real
1771
                 relocation.  */
1772
              bfd_vma off;
1773
 
1774
              if (h != NULL)
1775
                off = elf_cris_hash_entry (h)->tprel_refcount > 0
1776
                  ? h->got.offset + 4 : h->got.offset;
1777
              else
1778
                {
1779
                  off = local_got_offsets[r_symndx];
1780
                  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1781
                    off += 4;
1782
                }
1783
 
1784
              /* See above re bit 1 and bit 0 usage.  */
1785
              if ((off & 2) == 0)
1786
                {
1787
                  Elf_Internal_Rela outrel;
1788
                  bfd_byte *loc;
1789
 
1790
                  off &= ~3;
1791
 
1792
                  if (h != NULL)
1793
                    h->got.offset |= 2;
1794
                  else
1795
                    local_got_offsets[r_symndx] |= 2;
1796
 
1797
                  /* Clear the target contents of the GOT (just as a
1798
                     gesture; it's already cleared on allocation): this
1799
                     relocation is not like the other dynrelocs.  */
1800
                  bfd_put_32 (output_bfd, 0, sgot->contents + off);
1801
                  bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1802
 
1803
                  if (srelgot == NULL)
1804
                    srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1805
                  BFD_ASSERT (srelgot != NULL);
1806
 
1807
                  if (h != NULL && h->dynindx != -1)
1808
                    {
1809
                      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1810
                      relocation = 0;
1811
                    }
1812
                  else
1813
                    {
1814
                      outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1815
 
1816
                      /* NULL if we had an error.  */
1817
                      relocation -= elf_hash_table (info)->tls_sec == NULL
1818
                        ? 0 : elf_hash_table (info)->tls_sec->vma;
1819
                    }
1820
 
1821
                  outrel.r_offset = (sgot->output_section->vma
1822
                                     + sgot->output_offset
1823
                                     + off);
1824
                  outrel.r_addend = relocation;
1825
                  loc = srelgot->contents;
1826
                  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1827
 
1828
                  /* NULL if we had an error.  */
1829
                  if (srelgot->contents != NULL)
1830
                    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1831
                }
1832
              else
1833
                off &= ~3;
1834
 
1835
              relocation = sgot->output_offset + off
1836
                + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1837
            }
1838
 
1839
          /* The GOT-relative offset to the GOT entry is the
1840
             relocation, or for R_CRIS_32_GD, the actual address of
1841
             the GOT entry.  */
1842
          break;
1843
 
1844
        case R_CRIS_32_IE:
1845
          if (info->shared)
1846
            {
1847
              bfd_set_error (bfd_error_invalid_operation);
1848
 
1849
              /* We've already informed in cris_elf_check_relocs that
1850
                 this is an error.  */
1851
              return FALSE;
1852
            }
1853
          /* Fall through.  */
1854
 
1855
        case R_CRIS_32_GOT_TPREL:
1856
        case R_CRIS_16_GOT_TPREL:
1857
          if (rel->r_addend != 0)
1858
            {
1859
              /* We can't do anything for a relocation which is
1860
                 against a symbol *plus offset*.  GOT holds
1861
                 relocations for symbols.  Make this an error; the
1862
                 compiler isn't allowed to pass us these kinds of
1863
                 things.  */
1864
              (*_bfd_error_handler)
1865
                (_("%B, section %A: relocation %s with non-zero addend %d"
1866
                   " against symbol `%s'"),
1867
                 input_bfd,
1868
                 input_section,
1869
                 cris_elf_howto_table[r_type].name,
1870
                 rel->r_addend,
1871
                 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1872
              bfd_set_error (bfd_error_bad_value);
1873
              return FALSE;
1874
            }
1875
 
1876
          if (!info->shared && (h == NULL || h->def_regular))
1877
            {
1878
              /* Known contents of the GOT.  */
1879
              bfd_vma off;
1880
 
1881
              /* The symbol is defined in the program, so just write
1882
                 the -prog_tls_size+known_tpoffset into the GOT.  */
1883
              relocation -= elf_hash_table (info)->tls_sec->vma;
1884
              relocation -= elf_hash_table (info)->tls_size;
1885
 
1886
              if (h != NULL)
1887
                off = h->got.offset;
1888
              else
1889
                off = local_got_offsets[r_symndx];
1890
 
1891
              /* Bit 0 is used to mark whether we've emitted the required
1892
                 entry (and if needed R_CRIS_32_TPREL reloc).  Bit 1
1893
                 is used similarly for R_CRIS_DTP, see above.  */
1894
              if ((off & 1) == 0)
1895
                {
1896
                  off &= ~3;
1897
 
1898
                  if (h != NULL)
1899
                    h->got.offset |= 1;
1900
                  else
1901
                    local_got_offsets[r_symndx] |= 1;
1902
 
1903
                  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1904
                }
1905
              else
1906
                off &= ~3;
1907
 
1908
              relocation = sgot->output_offset + off
1909
                + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1910
            }
1911
          else
1912
            {
1913
              /* Emit a real relocation.  */
1914
              bfd_vma off;
1915
 
1916
              if (h != NULL)
1917
                off = h->got.offset;
1918
              else
1919
                off = local_got_offsets[r_symndx];
1920
 
1921
              /* See above re usage of bit 0 and 1.  */
1922
              if ((off & 1) == 0)
1923
                {
1924
                  Elf_Internal_Rela outrel;
1925
                  bfd_byte *loc;
1926
 
1927
                  off &= ~3;
1928
 
1929
                  if (h != NULL)
1930
                    h->got.offset |= 1;
1931
                  else
1932
                    local_got_offsets[r_symndx] |= 1;
1933
 
1934
                  if (srelgot == NULL)
1935
                    srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1936
                  BFD_ASSERT (srelgot != NULL);
1937
 
1938
                  if (h != NULL && h->dynindx != -1)
1939
                    {
1940
                      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1941
                      relocation = 0;
1942
                    }
1943
                  else
1944
                    {
1945
                      outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1946
 
1947
                      /* NULL if we had an error.  */
1948
                      relocation -= elf_hash_table (info)->tls_sec == NULL
1949
                        ? 0 : elf_hash_table (info)->tls_sec->vma;
1950
                    }
1951
 
1952
                  /* Just "define" the initial contents in some
1953
                     semi-logical way.  */
1954
                  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1955
 
1956
                  outrel.r_offset = (sgot->output_section->vma
1957
                                     + sgot->output_offset
1958
                                     + off);
1959
                  outrel.r_addend = relocation;
1960
                  loc = srelgot->contents;
1961
                  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1962
                  /* NULL if we had an error.  */
1963
                  if (srelgot->contents != NULL)
1964
                    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1965
                }
1966
              else
1967
                off &= ~3;
1968
 
1969
              relocation = sgot->output_offset + off
1970
                + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1971
            }
1972
 
1973
          /* The GOT-relative offset to the GOT entry is the relocation,
1974
             or for R_CRIS_32_GD, the actual address of the GOT entry.  */
1975
          break;
1976
 
1977
        case R_CRIS_16_TPREL:
1978
        case R_CRIS_32_TPREL:
1979
          /* This relocation must only be performed against symbols
1980
             defined in an ordinary (non-DSO) object.  */
1981
          if (info->shared)
1982
            {
1983
              bfd_set_error (bfd_error_invalid_operation);
1984
 
1985
              /* We've already informed in cris_elf_check_relocs that
1986
                 this is an error.  */
1987
              return FALSE;
1988
            }
1989
 
1990
          if (h != NULL
1991
              && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1992
              && !(h->def_regular || ELF_COMMON_DEF_P (h))
1993
              /* If it's undefined, then an error message has already
1994
                 been emitted.  */
1995
              && h->root.type != bfd_link_hash_undefined)
1996
            {
1997
              (*_bfd_error_handler)
1998
                (_("%B, section %A: relocation %s is"
1999
                   " not allowed for symbol: `%s'"
2000
                   " which is defined outside the program,"
2001
                   " perhaps a declaration mixup?"),
2002
                 input_bfd,
2003
                 input_section,
2004
                 cris_elf_howto_table[r_type].name,
2005
                 symname);
2006
              bfd_set_error (bfd_error_bad_value);
2007
              return FALSE;
2008
            }
2009
 
2010
          /* NULL if we had an error.  */
2011
          relocation -= elf_hash_table (info)->tls_sec == NULL
2012
            ? 0
2013
            : (elf_hash_table (info)->tls_sec->vma
2014
               + elf_hash_table (info)->tls_size);
2015
 
2016
          /* The TLS-relative offset is the relocation.  */
2017
          break;
2018
 
2019
        default:
2020
          BFD_FAIL ();
2021
          return FALSE;
2022
        }
2023
 
2024
      r = cris_final_link_relocate (howto, input_bfd, input_section,
2025
                                     contents, rel, relocation);
2026
 
2027
      if (r != bfd_reloc_ok)
2028
        {
2029
          const char * msg = (const char *) NULL;
2030
 
2031
          switch (r)
2032
            {
2033
            case bfd_reloc_overflow:
2034
              r = info->callbacks->reloc_overflow
2035
                (info, (h ? &h->root : NULL), symname, howto->name,
2036
                 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2037
              if (additional_relocation_error_msg_count > 0)
2038
                {
2039
                  additional_relocation_error_msg_count--;
2040
                  switch (r_type)
2041
                    {
2042
                    case R_CRIS_16_GOTPLT:
2043
                    case R_CRIS_16_GOT:
2044
 
2045
                      /* Not just TLS is involved here, so we make
2046
                         generation and message depend on -fPIC/-fpic
2047
                         only.  */
2048
                    case R_CRIS_16_GOT_TPREL:
2049
                    case R_CRIS_16_GOT_GD:
2050
                      (*_bfd_error_handler)
2051
                        (_("(too many global variables for -fpic:"
2052
                           " recompile with -fPIC)"));
2053
                      break;
2054
 
2055
                    case R_CRIS_16_TPREL:
2056
                    case R_CRIS_16_DTPREL:
2057
                      (*_bfd_error_handler)
2058
                        (_("(thread-local data too big for -fpic or"
2059
                           " -msmall-tls: recompile with -fPIC or"
2060
                           " -mno-small-tls)"));
2061
                      break;
2062
 
2063
                      /* No known cause for overflow for other relocs.  */
2064
                    default:
2065
                      break;
2066
                    }
2067
                }
2068
              break;
2069
 
2070
            case bfd_reloc_undefined:
2071
              r = info->callbacks->undefined_symbol
2072
                (info, symname, input_bfd, input_section, rel->r_offset,
2073
                 TRUE);
2074
              break;
2075
 
2076
            case bfd_reloc_outofrange:
2077
              msg = _("internal error: out of range error");
2078
              break;
2079
 
2080
            case bfd_reloc_notsupported:
2081
              msg = _("internal error: unsupported relocation error");
2082
              break;
2083
 
2084
            case bfd_reloc_dangerous:
2085
              msg = _("internal error: dangerous relocation");
2086
              break;
2087
 
2088
            default:
2089
              msg = _("internal error: unknown error");
2090
              break;
2091
            }
2092
 
2093
          if (msg)
2094
            r = info->callbacks->warning
2095
              (info, msg, symname, input_bfd, input_section, rel->r_offset);
2096
 
2097
          if (! r)
2098
            return FALSE;
2099
        }
2100
    }
2101
 
2102
  return TRUE;
2103
}
2104
 
2105
/* Finish up dynamic symbol handling.  We set the contents of various
2106
   dynamic sections here.  */
2107
 
2108
static bfd_boolean
2109
elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2110
                                struct bfd_link_info *info,
2111
                                struct elf_link_hash_entry *h,
2112
                                Elf_Internal_Sym *sym)
2113
{
2114
  struct elf_cris_link_hash_table * htab;
2115
  bfd *dynobj;
2116
 
2117
  /* Where in the plt entry to put values.  */
2118
  int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2119
 
2120
  /* What offset to add to the distance to the first PLT entry for the
2121
     value at plt_off3.   */
2122
  int plt_off3_value_bias = 4;
2123
 
2124
  /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2125
     for PIC and non-PIC for v32 and pre-v32).  */
2126
  int plt_stub_offset = 8;
2127
  int plt_entry_size = PLT_ENTRY_SIZE;
2128
  const bfd_byte *plt_entry = elf_cris_plt_entry;
2129
  const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2130
 
2131
  htab = elf_cris_hash_table (info);
2132
  if (htab == NULL)
2133
    return FALSE;
2134
 
2135
  /* Adjust the various PLT entry offsets.  */
2136
  if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2137
    {
2138
      plt_off2 = 14;
2139
      plt_off3 = 20;
2140
      plt_off3_value_bias = -2;
2141
      plt_stub_offset = 12;
2142
      plt_entry_size = PLT_ENTRY_SIZE_V32;
2143
      plt_entry = elf_cris_plt_entry_v32;
2144
      plt_pic_entry = elf_cris_pic_plt_entry_v32;
2145
    }
2146
 
2147
  dynobj = elf_hash_table (info)->dynobj;
2148
 
2149
  if (h->plt.offset != (bfd_vma) -1)
2150
    {
2151
      asection *splt;
2152
      asection *sgotplt;
2153
      asection *srela;
2154
      bfd_vma got_base;
2155
 
2156
      bfd_vma gotplt_offset
2157
        = elf_cris_hash_entry (h)->gotplt_offset;
2158
      Elf_Internal_Rela rela;
2159
      bfd_byte *loc;
2160
      bfd_boolean has_gotplt = gotplt_offset != 0;
2161
 
2162
      /* Get the index in the .rela.plt relocations for the .got.plt
2163
         entry that corresponds to this symbol.
2164
         We have to count backwards here, and the result is only valid
2165
         as an index into .rela.plt.  We also have to undo the effect
2166
         of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2167
         .got.plt) for which gotplt_offset is adjusted, because while
2168
         that entry goes into .got.plt, its relocation goes into
2169
         .rela.got, not .rela.plt.  (It's not PLT-specific; not to be
2170
         processed as part of the runtime lazy .rela.plt relocation).
2171
         FIXME: There be literal constants here...  */
2172
      bfd_vma rela_plt_index
2173
        = (htab->dtpmod_refcount != 0
2174
           ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2175
 
2176
      /* Get the offset into the .got table of the entry that corresponds
2177
         to this function.  Note that we embed knowledge that "incoming"
2178
         .got goes after .got.plt in the output without padding (pointer
2179
         aligned).  However, that knowledge is present in several other
2180
         places too.  */
2181
      bfd_vma got_offset
2182
        = (has_gotplt
2183
           ? gotplt_offset
2184
           : h->got.offset + htab->next_gotplt_entry);
2185
 
2186
      /* This symbol has an entry in the procedure linkage table.  Set it
2187
         up.  */
2188
 
2189
      BFD_ASSERT (h->dynindx != -1);
2190
 
2191
      splt = bfd_get_section_by_name (dynobj, ".plt");
2192
      sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2193
      srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2194
      BFD_ASSERT (splt != NULL && sgotplt != NULL
2195
                  && (! has_gotplt || srela != NULL));
2196
 
2197
      got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2198
 
2199
      /* Fill in the entry in the procedure linkage table.  */
2200
      if (! info->shared)
2201
        {
2202
          memcpy (splt->contents + h->plt.offset, plt_entry,
2203
                  plt_entry_size);
2204
 
2205
          /* We need to enter the absolute address of the GOT entry here.  */
2206
          bfd_put_32 (output_bfd, got_base + got_offset,
2207
                      splt->contents + h->plt.offset + plt_off1);
2208
        }
2209
      else
2210
        {
2211
          memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2212
                  plt_entry_size);
2213
          bfd_put_32 (output_bfd, got_offset,
2214
                      splt->contents + h->plt.offset + plt_off1);
2215
        }
2216
 
2217
      /* Fill in the plt entry and make a relocation, if this is a "real"
2218
         PLT entry.  */
2219
      if (has_gotplt)
2220
        {
2221
          /* Fill in the offset to the reloc table.  */
2222
          bfd_put_32 (output_bfd,
2223
                      rela_plt_index * sizeof (Elf32_External_Rela),
2224
                      splt->contents + h->plt.offset + plt_off2);
2225
 
2226
          /* Fill in the offset to the first PLT entry, where to "jump".  */
2227
          bfd_put_32 (output_bfd,
2228
                      - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2229
                      splt->contents + h->plt.offset + plt_off3);
2230
 
2231
          /* Fill in the entry in the global offset table with the address of
2232
             the relocating stub.  */
2233
          bfd_put_32 (output_bfd,
2234
                      (splt->output_section->vma
2235
                       + splt->output_offset
2236
                       + h->plt.offset
2237
                       + plt_stub_offset),
2238
                      sgotplt->contents + got_offset);
2239
 
2240
          /* Fill in the entry in the .rela.plt section.  */
2241
          rela.r_offset = (sgotplt->output_section->vma
2242
                           + sgotplt->output_offset
2243
                           + got_offset);
2244
          rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2245
          rela.r_addend = 0;
2246
          loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2247
          bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2248
        }
2249
 
2250
      if (!h->def_regular)
2251
        {
2252
          /* Mark the symbol as undefined, rather than as defined in
2253
             the .plt section.  Leave the value alone.  */
2254
          sym->st_shndx = SHN_UNDEF;
2255
 
2256
          /* FIXME: From elf32-sparc.c 2001-02-19 (1.18).  I still don't
2257
             know whether resetting the value is significant; if it really
2258
             is, rather than a quirk or bug in the sparc port, then I
2259
             believe we'd see this elsewhere.  */
2260
          /* If the symbol is weak, we do need to clear the value.
2261
             Otherwise, the PLT entry would provide a definition for
2262
             the symbol even if the symbol wasn't defined anywhere,
2263
             and so the symbol would never be NULL.  */
2264
          if (!h->ref_regular_nonweak)
2265
            sym->st_value = 0;
2266
        }
2267
    }
2268
 
2269
  /* For an ordinary program, we emit .got relocs only for symbols that
2270
     are in the dynamic-symbols table and are either defined by the
2271
     program or are undefined weak symbols, or are function symbols
2272
     where we do not output a PLT: the PLT reloc was output above and all
2273
     references to the function symbol are redirected to the PLT.  */
2274
  if (h->got.offset != (bfd_vma) -1
2275
      && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2276
      && (info->shared
2277
          || (h->dynindx != -1
2278
              && h->plt.offset == (bfd_vma) -1
2279
              && !h->def_regular
2280
              && h->root.type != bfd_link_hash_undefweak)))
2281
    {
2282
      asection *sgot;
2283
      asection *srela;
2284
      Elf_Internal_Rela rela;
2285
      bfd_byte *loc;
2286
      bfd_byte *where;
2287
 
2288
      /* This symbol has an entry in the global offset table.  Set it up.  */
2289
 
2290
      sgot = bfd_get_section_by_name (dynobj, ".got");
2291
      srela = bfd_get_section_by_name (dynobj, ".rela.got");
2292
      BFD_ASSERT (sgot != NULL && srela != NULL);
2293
 
2294
      rela.r_offset = (sgot->output_section->vma
2295
                       + sgot->output_offset
2296
                       + (h->got.offset &~ (bfd_vma) 1));
2297
 
2298
      /* If this is a static link, or it is a -Bsymbolic link and the
2299
         symbol is defined locally or was forced to be local because
2300
         of a version file, we just want to emit a RELATIVE reloc.
2301
         The entry in the global offset table will already have been
2302
         initialized in the relocate_section function.  */
2303
      where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2304
      if (! elf_hash_table (info)->dynamic_sections_created
2305
          || (info->shared
2306
              && (info->symbolic || h->dynindx == -1)
2307
              && h->def_regular))
2308
        {
2309
          rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2310
          rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2311
        }
2312
      else
2313
        {
2314
          bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2315
          rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2316
          rela.r_addend = 0;
2317
        }
2318
 
2319
      loc = srela->contents;
2320
      loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2321
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2322
    }
2323
 
2324
  if (h->needs_copy)
2325
    {
2326
      asection *s;
2327
      Elf_Internal_Rela rela;
2328
      bfd_byte *loc;
2329
 
2330
      /* This symbol needs a copy reloc.  Set it up.  */
2331
 
2332
      BFD_ASSERT (h->dynindx != -1
2333
                  && (h->root.type == bfd_link_hash_defined
2334
                      || h->root.type == bfd_link_hash_defweak));
2335
 
2336
      s = bfd_get_section_by_name (h->root.u.def.section->owner,
2337
                                   ".rela.bss");
2338
      BFD_ASSERT (s != NULL);
2339
 
2340
      rela.r_offset = (h->root.u.def.value
2341
                       + h->root.u.def.section->output_section->vma
2342
                       + h->root.u.def.section->output_offset);
2343
      rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2344
      rela.r_addend = 0;
2345
      loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2346
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2347
    }
2348
 
2349
  /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
2350
  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2351
      || h == elf_hash_table (info)->hgot)
2352
    sym->st_shndx = SHN_ABS;
2353
 
2354
  return TRUE;
2355
}
2356
 
2357
/* Finish up the dynamic sections.  Do *not* emit relocs here, as their
2358
   offsets were changed, as part of -z combreloc handling, from those we
2359
   computed.  */
2360
 
2361
static bfd_boolean
2362
elf_cris_finish_dynamic_sections (output_bfd, info)
2363
     bfd *output_bfd;
2364
     struct bfd_link_info *info;
2365
{
2366
  bfd *dynobj;
2367
  asection *sgot;
2368
  asection *sdyn;
2369
 
2370
  dynobj = elf_hash_table (info)->dynobj;
2371
 
2372
  sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2373
  BFD_ASSERT (sgot != NULL);
2374
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2375
 
2376
  if (elf_hash_table (info)->dynamic_sections_created)
2377
    {
2378
      asection *splt;
2379
      Elf32_External_Dyn *dyncon, *dynconend;
2380
 
2381
      splt = bfd_get_section_by_name (dynobj, ".plt");
2382
      BFD_ASSERT (splt != NULL && sdyn != NULL);
2383
 
2384
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
2385
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2386
      for (; dyncon < dynconend; dyncon++)
2387
        {
2388
          Elf_Internal_Dyn dyn;
2389
          asection *s;
2390
 
2391
          bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2392
 
2393
          switch (dyn.d_tag)
2394
            {
2395
            default:
2396
              break;
2397
 
2398
            case DT_PLTGOT:
2399
              s = bfd_get_section_by_name (output_bfd, ".got");
2400
              BFD_ASSERT (s != NULL);
2401
              dyn.d_un.d_ptr = s->vma;
2402
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2403
              break;
2404
 
2405
            case DT_JMPREL:
2406
              /* Yes, we *can* have a .plt and no .plt.rela, for instance
2407
                 if all symbols are found in the .got (not .got.plt).  */
2408
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2409
              dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2410
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2411
              break;
2412
 
2413
            case DT_PLTRELSZ:
2414
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2415
              if (s == NULL)
2416
                dyn.d_un.d_val = 0;
2417
              else
2418
                dyn.d_un.d_val = s->size;
2419
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2420
              break;
2421
 
2422
            case DT_RELASZ:
2423
              /* The procedure linkage table relocs (DT_JMPREL) should
2424
                 not be included in the overall relocs (DT_RELA).
2425
                 Therefore, we override the DT_RELASZ entry here to
2426
                 make it not include the JMPREL relocs.  Since the
2427
                 linker script arranges for .rela.plt to follow all
2428
                 other relocation sections, we don't have to worry
2429
                 about changing the DT_RELA entry.  */
2430
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2431
              if (s != NULL)
2432
                dyn.d_un.d_val -= s->size;
2433
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2434
              break;
2435
            }
2436
        }
2437
 
2438
      /* Fill in the first entry in the procedure linkage table.  */
2439
      if (splt->size > 0)
2440
        {
2441
          if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2442
            {
2443
              if (info->shared)
2444
                memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2445
                        PLT_ENTRY_SIZE_V32);
2446
              else
2447
                {
2448
                  memcpy (splt->contents, elf_cris_plt0_entry_v32,
2449
                          PLT_ENTRY_SIZE_V32);
2450
                  bfd_put_32 (output_bfd,
2451
                              sgot->output_section->vma
2452
                              + sgot->output_offset + 4,
2453
                              splt->contents + 4);
2454
 
2455
                  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2456
                    = PLT_ENTRY_SIZE_V32;
2457
                }
2458
            }
2459
          else
2460
            {
2461
              if (info->shared)
2462
                memcpy (splt->contents, elf_cris_pic_plt0_entry,
2463
                        PLT_ENTRY_SIZE);
2464
              else
2465
                {
2466
                  memcpy (splt->contents, elf_cris_plt0_entry,
2467
                          PLT_ENTRY_SIZE);
2468
                  bfd_put_32 (output_bfd,
2469
                              sgot->output_section->vma
2470
                              + sgot->output_offset + 4,
2471
                              splt->contents + 6);
2472
                  bfd_put_32 (output_bfd,
2473
                              sgot->output_section->vma
2474
                              + sgot->output_offset + 8,
2475
                              splt->contents + 14);
2476
 
2477
                  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2478
                    = PLT_ENTRY_SIZE;
2479
                }
2480
            }
2481
        }
2482
    }
2483
 
2484
  /* Fill in the first three entries in the global offset table.  */
2485
  if (sgot->size > 0)
2486
    {
2487
      if (sdyn == NULL)
2488
        bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2489
      else
2490
        bfd_put_32 (output_bfd,
2491
                    sdyn->output_section->vma + sdyn->output_offset,
2492
                    sgot->contents);
2493
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2494
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2495
    }
2496
 
2497
  elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2498
 
2499
  return TRUE;
2500
}
2501
 
2502
/* Return the section that should be marked against GC for a given
2503
   relocation.  */
2504
 
2505
static asection *
2506
cris_elf_gc_mark_hook (asection *sec,
2507
                       struct bfd_link_info *info,
2508
                       Elf_Internal_Rela *rel,
2509
                       struct elf_link_hash_entry *h,
2510
                       Elf_Internal_Sym *sym)
2511
{
2512
  enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2513
  if (h != NULL)
2514
    switch (r_type)
2515
      {
2516
      case R_CRIS_GNU_VTINHERIT:
2517
      case R_CRIS_GNU_VTENTRY:
2518
        return NULL;
2519
 
2520
      default:
2521
        break;
2522
      }
2523
 
2524
  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2525
}
2526
 
2527
/* Update the got entry reference counts for the section being removed.  */
2528
 
2529
static bfd_boolean
2530
cris_elf_gc_sweep_hook (bfd *abfd,
2531
                        struct bfd_link_info *info,
2532
                        asection *sec,
2533
                        const Elf_Internal_Rela *relocs)
2534
{
2535
  struct elf_cris_link_hash_table * htab;
2536
  Elf_Internal_Shdr *symtab_hdr;
2537
  struct elf_link_hash_entry **sym_hashes;
2538
  bfd_signed_vma *local_got_refcounts;
2539
  const Elf_Internal_Rela *rel, *relend;
2540
  bfd *dynobj;
2541
  asection *sgot;
2542
  asection *srelgot;
2543
 
2544
  if (info->relocatable)
2545
    return TRUE;
2546
 
2547
  dynobj = elf_hash_table (info)->dynobj;
2548
  if (dynobj == NULL)
2549
    return TRUE;
2550
 
2551
  htab = elf_cris_hash_table (info);
2552
  if (htab == NULL)
2553
    return FALSE;
2554
 
2555
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2556
  sym_hashes = elf_sym_hashes (abfd);
2557
  local_got_refcounts = elf_local_got_refcounts (abfd);
2558
 
2559
  sgot = bfd_get_section_by_name (dynobj, ".got");
2560
  srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2561
 
2562
  relend = relocs + sec->reloc_count;
2563
  for (rel = relocs; rel < relend; rel++)
2564
    {
2565
      unsigned long r_symndx;
2566
      struct elf_link_hash_entry *h = NULL;
2567
      bfd_signed_vma got_element_size = 4;
2568
      bfd_signed_vma *specific_refcount = NULL;
2569
      enum elf_cris_reloc_type r_type;
2570
 
2571
      r_symndx = ELF32_R_SYM (rel->r_info);
2572
      if (r_symndx >= symtab_hdr->sh_info)
2573
        {
2574
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2575
          while (h->root.type == bfd_link_hash_indirect
2576
                 || h->root.type == bfd_link_hash_warning)
2577
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
2578
        }
2579
 
2580
      r_type = ELF32_R_TYPE (rel->r_info);
2581
      switch (r_type)
2582
        {
2583
        case R_CRIS_32_GOT:
2584
        case R_CRIS_16_GOT:
2585
        case R_CRIS_16_GOTPLT:
2586
        case R_CRIS_32_GOTPLT:
2587
          specific_refcount = h != NULL
2588
            ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2589
            : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2590
          break;
2591
 
2592
        case R_CRIS_32_GD:
2593
        case R_CRIS_32_GOT_GD:
2594
        case R_CRIS_16_GOT_GD:
2595
          got_element_size = 8;
2596
          specific_refcount = h != NULL
2597
            ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2598
            : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2599
          break;
2600
 
2601
        case R_CRIS_32_IE:
2602
        case R_CRIS_16_GOT_TPREL:
2603
        case R_CRIS_32_GOT_TPREL:
2604
          specific_refcount = h != NULL
2605
            ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2606
            : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2607
          break;
2608
 
2609
        default:
2610
          break;
2611
        }
2612
 
2613
      switch (r_type)
2614
        {
2615
        case R_CRIS_32_IE:
2616
        case R_CRIS_32_GD:
2617
        case R_CRIS_16_GOT_TPREL:
2618
        case R_CRIS_32_GOT_TPREL:
2619
        case R_CRIS_32_GOT_GD:
2620
        case R_CRIS_16_GOT_GD:
2621
        case R_CRIS_16_GOT:
2622
        case R_CRIS_32_GOT:
2623
          if (h != NULL)
2624
            {
2625
              /* If the counters are 0 when we got here, we've
2626
                 miscounted somehow somewhere, an internal error.  */
2627
              BFD_ASSERT (h->got.refcount > 0);
2628
              --h->got.refcount;
2629
 
2630
              BFD_ASSERT (*specific_refcount > 0);
2631
              --*specific_refcount;
2632
              if (*specific_refcount == 0)
2633
                {
2634
                  /* We don't need the .got entry any more.  */
2635
                  sgot->size -= got_element_size;
2636
                  srelgot->size -= sizeof (Elf32_External_Rela);
2637
                }
2638
              break;
2639
            }
2640
 
2641
        local_got_reloc:
2642
          if (local_got_refcounts != NULL)
2643
            {
2644
              /* If the counters are 0 when we got here, we've
2645
                 miscounted somehow somewhere, an internal error.  */
2646
              BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2647
              --local_got_refcounts[r_symndx];
2648
 
2649
              BFD_ASSERT (*specific_refcount > 0);
2650
              --*specific_refcount;
2651
              if (*specific_refcount == 0)
2652
                {
2653
                  /* We don't need the .got entry any more.  */
2654
                  sgot->size -= got_element_size;
2655
                  if (info->shared)
2656
                    srelgot->size -= sizeof (Elf32_External_Rela);
2657
                }
2658
            }
2659
          break;
2660
 
2661
        case R_CRIS_16_GOTPLT:
2662
        case R_CRIS_32_GOTPLT:
2663
          /* For local symbols, treat these like GOT relocs.  */
2664
          if (h == NULL)
2665
            goto local_got_reloc;
2666
          /* Fall through.  */
2667
 
2668
        case R_CRIS_32_PLT_GOTREL:
2669
          /* FIXME: We don't garbage-collect away the .got section.  */
2670
          if (local_got_refcounts != NULL)
2671
            local_got_refcounts[-1]--;
2672
          /* Fall through.  */
2673
 
2674
        case R_CRIS_8_PCREL:
2675
        case R_CRIS_16_PCREL:
2676
        case R_CRIS_32_PCREL:
2677
        case R_CRIS_32_PLT_PCREL:
2678
          if (h != NULL)
2679
            {
2680
              if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2681
                  && h->plt.refcount > 0)
2682
                --h->plt.refcount;
2683
            }
2684
          break;
2685
 
2686
        case R_CRIS_32_DTPREL:
2687
          /* This'd be a .dtpreld entry in e.g. debug info.  */
2688
          if ((sec->flags & SEC_ALLOC) == 0)
2689
            break;
2690
          /* Fall through.  */
2691
        case R_CRIS_16_DTPREL:
2692
          htab->dtpmod_refcount--;
2693
          if (htab->dtpmod_refcount == 0)
2694
            htab->next_gotplt_entry -= 8;
2695
          BFD_ASSERT (local_got_refcounts != NULL);
2696
          local_got_refcounts[-1]--;
2697
          break;
2698
 
2699
        default:
2700
          break;
2701
        }
2702
    }
2703
 
2704
  return TRUE;
2705
}
2706
 
2707
/* The elf_backend_plt_sym_val hook function.  */
2708
 
2709
static bfd_vma
2710
cris_elf_plt_sym_val (bfd_vma i, const asection *plt,
2711
                      const arelent *rel ATTRIBUTE_UNUSED)
2712
{
2713
  bfd_size_type plt_entry_size;
2714
 
2715
  plt_entry_size
2716
    = (bfd_get_mach (plt->owner) == bfd_mach_cris_v32
2717
       ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2718
 
2719
  return plt->vma + (i + 1) * plt_entry_size;
2720
}
2721
 
2722
/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2723
   entry but we found we will not create any.  Called when we find we will
2724
   not have any PLT for this symbol, by for example
2725
   elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2726
   or elf_cris_size_dynamic_sections if no dynamic sections will be
2727
   created (we're only linking static objects).  */
2728
 
2729
static bfd_boolean
2730
elf_cris_adjust_gotplt_to_got (h, p)
2731
     struct elf_cris_link_hash_entry *h;
2732
     PTR p;
2733
{
2734
  struct bfd_link_info *info = (struct bfd_link_info *) p;
2735
 
2736
  if (h->root.root.type == bfd_link_hash_warning)
2737
    h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2738
 
2739
  /* If nobody wanted a GOTPLT with this symbol, we're done.  */
2740
  if (h->gotplt_refcount <= 0)
2741
    return TRUE;
2742
 
2743
  if (h->reg_got_refcount > 0)
2744
    {
2745
      /* There's a GOT entry for this symbol.  Just adjust the refcounts.
2746
         Probably not necessary at this stage, but keeping them accurate
2747
         helps avoiding surprises later.  */
2748
      h->root.got.refcount += h->gotplt_refcount;
2749
      h->reg_got_refcount += h->gotplt_refcount;
2750
      h->gotplt_refcount = 0;
2751
    }
2752
  else
2753
    {
2754
      /* No GOT entry for this symbol.  We need to create one.  */
2755
      bfd *dynobj = elf_hash_table (info)->dynobj;
2756
      asection *sgot;
2757
      asection *srelgot;
2758
 
2759
      BFD_ASSERT (dynobj != NULL);
2760
      sgot = bfd_get_section_by_name (dynobj, ".got");
2761
      srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2762
 
2763
      /* Put accurate refcounts there.  */
2764
      h->root.got.refcount += h->gotplt_refcount;
2765
      h->reg_got_refcount = h->gotplt_refcount;
2766
 
2767
      h->gotplt_refcount = 0;
2768
 
2769
      /* We always have a .got and a .rela.got section if there were
2770
         GOTPLT relocs in input.  */
2771
      BFD_ASSERT (sgot != NULL && srelgot != NULL);
2772
 
2773
      /* Allocate space in the .got section.  */
2774
      sgot->size += 4;
2775
 
2776
      /* Allocate relocation space.  */
2777
      srelgot->size += sizeof (Elf32_External_Rela);
2778
    }
2779
 
2780
  return TRUE;
2781
}
2782
 
2783
/* Try to fold PLT entries with GOT entries.  There are two cases when we
2784
   want to do this:
2785
 
2786
   - When all PLT references are GOTPLT references, and there are GOT
2787
     references, and this is not the executable.  We don't have to
2788
     generate a PLT at all.
2789
 
2790
   - When there are both (ordinary) PLT references and GOT references,
2791
     and this isn't the executable.
2792
     We want to make the PLT reference use the ordinary GOT entry rather
2793
     than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2794
     since the GOT entry will have to be resolved at startup anyway.
2795
 
2796
   Though the latter case is handled when room for the PLT is allocated,
2797
   not here.
2798
 
2799
   By folding into the GOT, we may need a round-trip to a PLT in the
2800
   executable for calls, a loss in performance.  Still, losing a
2801
   reloc is a win in size and at least in start-up time.
2802
 
2803
   Note that this function is called before symbols are forced local by
2804
   version scripts.  The differing cases are handled by
2805
   elf_cris_hide_symbol.  */
2806
 
2807
static bfd_boolean
2808
elf_cris_try_fold_plt_to_got (h, p)
2809
     struct elf_cris_link_hash_entry *h;
2810
     PTR p;
2811
{
2812
  struct bfd_link_info *info = (struct bfd_link_info *) p;
2813
 
2814
  /* If there are no GOT references for this symbol, we can't fold any
2815
     other reference so there's nothing to do.  Likewise if there are no
2816
     PLT references; GOTPLT references included.  */
2817
  if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2818
    return TRUE;
2819
 
2820
  /* GOTPLT relocs are supposed to be included into the PLT refcount.  */
2821
  BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2822
 
2823
  if (h->gotplt_refcount == h->root.plt.refcount)
2824
    {
2825
      /* The only PLT references are GOTPLT references, and there are GOT
2826
         references.  Convert PLT to GOT references.  */
2827
      if (! elf_cris_adjust_gotplt_to_got (h, info))
2828
        return FALSE;
2829
 
2830
      /* Clear the PLT references, so no PLT will be created.  */
2831
      h->root.plt.offset = (bfd_vma) -1;
2832
    }
2833
 
2834
  return TRUE;
2835
}
2836
 
2837
/* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2838
   to use a GOT entry (and create one) rather than requiring a GOTPLT
2839
   entry.  */
2840
 
2841
static void
2842
elf_cris_hide_symbol (info, h, force_local)
2843
     struct bfd_link_info *info;
2844
     struct elf_link_hash_entry *h;
2845
     bfd_boolean force_local;
2846
{
2847
  elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2848
 
2849
  _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2850
}
2851
 
2852
/* Adjust a symbol defined by a dynamic object and referenced by a
2853
   regular object.  The current definition is in some section of the
2854
   dynamic object, but we're not including those sections.  We have to
2855
   change the definition to something the rest of the link can
2856
   understand.  */
2857
 
2858
static bfd_boolean
2859
elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2860
                                struct elf_link_hash_entry *h)
2861
{
2862
  struct elf_cris_link_hash_table * htab;
2863
  bfd *dynobj;
2864
  asection *s;
2865
  bfd_size_type plt_entry_size;
2866
 
2867
  htab = elf_cris_hash_table (info);
2868
  if (htab == NULL)
2869
    return FALSE;
2870
 
2871
  dynobj = elf_hash_table (info)->dynobj;
2872
 
2873
  /* Make sure we know what is going on here.  */
2874
  BFD_ASSERT (dynobj != NULL
2875
              && (h->needs_plt
2876
                  || h->u.weakdef != NULL
2877
                  || (h->def_dynamic
2878
                      && h->ref_regular
2879
                      && !h->def_regular)));
2880
 
2881
  plt_entry_size
2882
    = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2883
       ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2884
 
2885
  /* If this is a function, put it in the procedure linkage table.  We
2886
     will fill in the contents of the procedure linkage table later,
2887
     when we know the address of the .got section.  */
2888
  if (h->type == STT_FUNC
2889
      || h->needs_plt)
2890
    {
2891
      /* If we link a program (not a DSO), we'll get rid of unnecessary
2892
         PLT entries; we point to the actual symbols -- even for pic
2893
         relocs, because a program built with -fpic should have the same
2894
         result as one built without -fpic, specifically considering weak
2895
         symbols.
2896
         FIXME: m68k and i386 differ here, for unclear reasons.  */
2897
      if (! info->shared
2898
          && !h->def_dynamic)
2899
        {
2900
          /* This case can occur if we saw a PLT reloc in an input file,
2901
             but the symbol was not defined by a dynamic object.  In such
2902
             a case, we don't actually need to build a procedure linkage
2903
             table, and we can just do an absolute or PC reloc instead, or
2904
             change a .got.plt index to a .got index for GOTPLT relocs.  */
2905
          BFD_ASSERT (h->needs_plt);
2906
          h->needs_plt = 0;
2907
          h->plt.offset = (bfd_vma) -1;
2908
          return
2909
            elf_cris_adjust_gotplt_to_got ((struct
2910
                                            elf_cris_link_hash_entry *) h,
2911
                                           info);
2912
        }
2913
 
2914
      /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2915
         where a pointer-equivalent symbol was unimportant (i.e. more
2916
         like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2917
         of the PLT.  We can't for the executable, because the GOT
2918
         entries will point to the PLT there (and be constant).  */
2919
      if (info->shared
2920
          && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2921
                                            h, info))
2922
        return FALSE;
2923
 
2924
      /* GC or folding may have rendered this entry unused.  */
2925
      if (h->plt.refcount <= 0)
2926
        {
2927
          h->needs_plt = 0;
2928
          h->plt.offset = (bfd_vma) -1;
2929
          return TRUE;
2930
        }
2931
 
2932
      /* Make sure this symbol is output as a dynamic symbol.  */
2933
      if (h->dynindx == -1)
2934
        {
2935
          if (! bfd_elf_link_record_dynamic_symbol (info, h))
2936
            return FALSE;
2937
        }
2938
 
2939
      s = bfd_get_section_by_name (dynobj, ".plt");
2940
      BFD_ASSERT (s != NULL);
2941
 
2942
      /* If this is the first .plt entry, make room for the special
2943
         first entry.  */
2944
      if (s->size == 0)
2945
        s->size += plt_entry_size;
2946
 
2947
      /* If this symbol is not defined in a regular file, and we are
2948
         not generating a shared library, then set the symbol to this
2949
         location in the .plt.  */
2950
      if (!info->shared
2951
          && !h->def_regular)
2952
        {
2953
          h->root.u.def.section = s;
2954
          h->root.u.def.value = s->size;
2955
        }
2956
 
2957
      /* If there's already a GOT entry, use that, not a .got.plt.  A
2958
         GOT field still has a reference count when we get here; it's
2959
         not yet changed to an offset.  We can't do this for an
2960
         executable, because then the reloc associated with the PLT
2961
         would get a non-PLT reloc pointing to the PLT.  FIXME: Move
2962
         this to elf_cris_try_fold_plt_to_got.  */
2963
      if (info->shared && h->got.refcount > 0)
2964
        {
2965
          h->got.refcount += h->plt.refcount;
2966
 
2967
          /* Mark the PLT offset to use the GOT entry by setting the low
2968
             bit in the plt offset; it is always a multiple of
2969
             plt_entry_size (which is at least a multiple of 2).  */
2970
          BFD_ASSERT ((s->size % plt_entry_size) == 0);
2971
 
2972
          /* Change the PLT refcount to an offset.  */
2973
          h->plt.offset = s->size;
2974
 
2975
          /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2976
             that the got entry should be used instead.  */
2977
          BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2978
                       h)->gotplt_offset == 0);
2979
 
2980
          /* Make room for this entry.  */
2981
          s->size += plt_entry_size;
2982
 
2983
          return TRUE;
2984
        }
2985
 
2986
      /* No GOT reference for this symbol; prepare for an ordinary PLT.  */
2987
      h->plt.offset = s->size;
2988
 
2989
      /* Make room for this entry.  */
2990
      s->size += plt_entry_size;
2991
 
2992
      /* We also need to make an entry in the .got.plt section, which
2993
         will be placed in the .got section by the linker script.  */
2994
      ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2995
        = htab->next_gotplt_entry;
2996
      htab->next_gotplt_entry += 4;
2997
 
2998
      s = bfd_get_section_by_name (dynobj, ".got.plt");
2999
      BFD_ASSERT (s != NULL);
3000
      s->size += 4;
3001
 
3002
      /* We also need to make an entry in the .rela.plt section.  */
3003
 
3004
      s = bfd_get_section_by_name (dynobj, ".rela.plt");
3005
      BFD_ASSERT (s != NULL);
3006
      s->size += sizeof (Elf32_External_Rela);
3007
 
3008
      return TRUE;
3009
    }
3010
 
3011
  /* Reinitialize the plt offset now that it is not used as a reference
3012
     count any more.  */
3013
  h->plt.offset = (bfd_vma) -1;
3014
 
3015
  /* If this is a weak symbol, and there is a real definition, the
3016
     processor independent code will have arranged for us to see the
3017
     real definition first, and we can just use the same value.  */
3018
  if (h->u.weakdef != NULL)
3019
    {
3020
      BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3021
                  || h->u.weakdef->root.type == bfd_link_hash_defweak);
3022
      h->root.u.def.section = h->u.weakdef->root.u.def.section;
3023
      h->root.u.def.value = h->u.weakdef->root.u.def.value;
3024
      return TRUE;
3025
    }
3026
 
3027
  /* This is a reference to a symbol defined by a dynamic object which
3028
     is not a function.  */
3029
 
3030
  /* If we are creating a shared library, we must presume that the
3031
     only references to the symbol are via the global offset table.
3032
     For such cases we need not do anything here; the relocations will
3033
     be handled correctly by relocate_section.  */
3034
  if (info->shared)
3035
    return TRUE;
3036
 
3037
  /* If there are no references to this symbol that do not use the
3038
     GOT, we don't need to generate a copy reloc.  */
3039
  if (!h->non_got_ref)
3040
    return TRUE;
3041
 
3042
  if (h->size == 0)
3043
    {
3044
      (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
3045
                             h->root.root.string);
3046
      return TRUE;
3047
    }
3048
 
3049
  /* We must allocate the symbol in our .dynbss section, which will
3050
     become part of the .bss section of the executable.  There will be
3051
     an entry for this symbol in the .dynsym section.  The dynamic
3052
     object will contain position independent code, so all references
3053
     from the dynamic object to this symbol will go through the global
3054
     offset table.  The dynamic linker will use the .dynsym entry to
3055
     determine the address it must put in the global offset table, so
3056
     both the dynamic object and the regular object will refer to the
3057
     same memory location for the variable.  */
3058
 
3059
  s = bfd_get_section_by_name (dynobj, ".dynbss");
3060
  BFD_ASSERT (s != NULL);
3061
 
3062
  /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3063
     copy the initial value out of the dynamic object and into the
3064
     runtime process image.  We need to remember the offset into the
3065
     .rela.bss section we are going to use.  */
3066
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3067
    {
3068
      asection *srel;
3069
 
3070
      srel = bfd_get_section_by_name (dynobj, ".rela.bss");
3071
      BFD_ASSERT (srel != NULL);
3072
      srel->size += sizeof (Elf32_External_Rela);
3073
      h->needs_copy = 1;
3074
    }
3075
 
3076
  return _bfd_elf_adjust_dynamic_copy (h, s);
3077
}
3078
 
3079
/* Adjust our "subclass" elements for an indirect symbol.  */
3080
 
3081
static void
3082
elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3083
                               struct elf_link_hash_entry *dir,
3084
                               struct elf_link_hash_entry *ind)
3085
{
3086
  struct elf_cris_link_hash_entry *edir, *eind;
3087
 
3088
  edir = (struct elf_cris_link_hash_entry *) dir;
3089
  eind = (struct elf_cris_link_hash_entry *) ind;
3090
 
3091
  /* Only indirect symbols are replaced; we're not interested in
3092
     updating any of EIND's fields for other symbols.  */
3093
  if (eind->root.root.type != bfd_link_hash_indirect)
3094
    {
3095
      /* Still, we need to copy flags for e.g. weak definitions.  */
3096
      _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3097
      return;
3098
    }
3099
 
3100
  BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3101
 
3102
#define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3103
#define XMOVE(F) XMOVOPZ (F, +=, 0)
3104
  if (eind->pcrel_relocs_copied != NULL)
3105
    {
3106
      if (edir->pcrel_relocs_copied != NULL)
3107
        {
3108
          struct elf_cris_pcrel_relocs_copied **pp;
3109
          struct elf_cris_pcrel_relocs_copied *p;
3110
 
3111
          /* Add reloc counts against the indirect sym to the direct sym
3112
             list.  Merge any entries against the same section.  */
3113
          for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
3114
            {
3115
              struct elf_cris_pcrel_relocs_copied *q;
3116
              p = *pp;
3117
              for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
3118
                if (q->section == p->section)
3119
                  {
3120
                    q->count += p->count;
3121
                    *pp = p->next;
3122
                    break;
3123
                  }
3124
              if (q == NULL)
3125
                pp = &p->next;
3126
            }
3127
          *pp = edir->pcrel_relocs_copied;
3128
        }
3129
      XMOVOPZ (pcrel_relocs_copied, =, NULL);
3130
    }
3131
  XMOVE (gotplt_refcount);
3132
  XMOVE (gotplt_offset);
3133
  XMOVE (reg_got_refcount);
3134
  XMOVE (tprel_refcount);
3135
  XMOVE (dtp_refcount);
3136
#undef XMOVE
3137
#undef XMOVOPZ
3138
 
3139
  _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3140
}
3141
 
3142
/* Look through the relocs for a section during the first phase.  */
3143
 
3144
static bfd_boolean
3145
cris_elf_check_relocs (bfd *abfd,
3146
                       struct bfd_link_info *info,
3147
                       asection *sec,
3148
                       const Elf_Internal_Rela *relocs)
3149
{
3150
  struct elf_cris_link_hash_table * htab;
3151
  bfd *dynobj;
3152
  Elf_Internal_Shdr *symtab_hdr;
3153
  struct elf_link_hash_entry **sym_hashes;
3154
  bfd_signed_vma *local_got_refcounts;
3155
  const Elf_Internal_Rela *rel;
3156
  const Elf_Internal_Rela *rel_end;
3157
  asection *sgot;
3158
  asection *srelgot;
3159
  asection *sreloc;
3160
 
3161
  if (info->relocatable)
3162
    return TRUE;
3163
 
3164
  htab = elf_cris_hash_table (info);
3165
  if (htab == NULL)
3166
    return FALSE;
3167
 
3168
  dynobj = elf_hash_table (info)->dynobj;
3169
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3170
  sym_hashes = elf_sym_hashes (abfd);
3171
  local_got_refcounts = elf_local_got_refcounts (abfd);
3172
 
3173
  sgot = NULL;
3174
  srelgot = NULL;
3175
  sreloc = NULL;
3176
 
3177
  rel_end = relocs + sec->reloc_count;
3178
  for (rel = relocs; rel < rel_end; rel++)
3179
    {
3180
      struct elf_link_hash_entry *h;
3181
      unsigned long r_symndx;
3182
      enum elf_cris_reloc_type r_type;
3183
      bfd_signed_vma got_element_size = 4;
3184
      unsigned long r_symndx_lgot = INT_MAX;
3185
 
3186
      r_symndx = ELF32_R_SYM (rel->r_info);
3187
      if (r_symndx < symtab_hdr->sh_info)
3188
        {
3189
          h = NULL;
3190
          r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3191
        }
3192
      else
3193
        {
3194
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3195
          while (h->root.type == bfd_link_hash_indirect
3196
                 || h->root.type == bfd_link_hash_warning)
3197
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
3198
        }
3199
 
3200
      r_type = ELF32_R_TYPE (rel->r_info);
3201
 
3202
      /* Some relocs require linker-created sections; we need to hang them
3203
         on the first input bfd we found that contained dynamic relocs.  */
3204
      switch (r_type)
3205
        {
3206
        case R_CRIS_32_DTPREL:
3207
          if ((sec->flags & SEC_ALLOC) == 0)
3208
            /* This'd be a .dtpreld entry in e.g. debug info.  We have
3209
               several different switch statements below, but none of
3210
               that is needed; we need no preparations for resolving
3211
               R_CRIS_32_DTPREL into a non-allocated section (debug
3212
               info), so let's just move on to the next
3213
               relocation.  */
3214
            continue;
3215
          /* Fall through.  */
3216
        case R_CRIS_16_DTPREL:
3217
          /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3218
             entry at index 3. */
3219
          if (htab->dtpmod_refcount == 0)
3220
            htab->next_gotplt_entry += 8;
3221
 
3222
          htab->dtpmod_refcount++;
3223
          /* Fall through.  */
3224
 
3225
        case R_CRIS_32_IE:
3226
        case R_CRIS_32_GD:
3227
        case R_CRIS_16_GOT_GD:
3228
        case R_CRIS_32_GOT_GD:
3229
        case R_CRIS_32_GOT_TPREL:
3230
        case R_CRIS_16_GOT_TPREL:
3231
        case R_CRIS_16_GOT:
3232
        case R_CRIS_32_GOT:
3233
        case R_CRIS_32_GOTREL:
3234
        case R_CRIS_32_PLT_GOTREL:
3235
        case R_CRIS_32_PLT_PCREL:
3236
        case R_CRIS_16_GOTPLT:
3237
        case R_CRIS_32_GOTPLT:
3238
          if (dynobj == NULL)
3239
            {
3240
              elf_hash_table (info)->dynobj = dynobj = abfd;
3241
 
3242
              /* We could handle this if we can get a handle on the
3243
                 output bfd in elf_cris_adjust_dynamic_symbol.  Failing
3244
                 that, we must insist on dynobj being a specific mach.  */
3245
              if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3246
                {
3247
                  (*_bfd_error_handler)
3248
                    (_("%B, section %A:\n  v10/v32 compatible object %s"
3249
                       " must not contain a PIC relocation"),
3250
                     abfd, sec);
3251
                  return FALSE;
3252
                }
3253
 
3254
              /* Create the .got section, so we can assume it's always
3255
                 present whenever there's a dynobj.  */
3256
              if (!_bfd_elf_create_got_section (dynobj, info))
3257
                return FALSE;
3258
            }
3259
 
3260
          if (sgot == NULL)
3261
            sgot = bfd_get_section_by_name (dynobj, ".got");
3262
 
3263
          if (local_got_refcounts == NULL)
3264
            {
3265
              bfd_size_type amt;
3266
 
3267
              /* We use index local_got_refcounts[-1] to count all
3268
                 GOT-relative relocations that do not have explicit
3269
                 GOT entries.  */
3270
              amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3271
              amt *= sizeof (bfd_signed_vma);
3272
              local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3273
              if (local_got_refcounts == NULL)
3274
                return FALSE;
3275
 
3276
              local_got_refcounts++;
3277
              elf_local_got_refcounts (abfd) = local_got_refcounts;
3278
            }
3279
          break;
3280
 
3281
        default:
3282
          break;
3283
        }
3284
 
3285
      /* Some relocs require a global offset table (but perhaps not a
3286
         specific GOT entry).  */
3287
      switch (r_type)
3288
        {
3289
        case R_CRIS_16_DTPREL:
3290
        case R_CRIS_32_DTPREL:
3291
          /* Not requesting .got.rela for an executable: the contents
3292
             of the first entry is constant there.  For a shared
3293
             library, we need .got.rela for the R_CRIS_DTPMOD
3294
             relocation at index 3.  */
3295
          if (!info->shared)
3296
            break;
3297
          /* Fall through.  */
3298
 
3299
        case R_CRIS_32_IE:
3300
        case R_CRIS_32_GD:
3301
        case R_CRIS_16_GOT_GD:
3302
        case R_CRIS_32_GOT_GD:
3303
        case R_CRIS_32_GOT_TPREL:
3304
        case R_CRIS_16_GOT_TPREL:
3305
          /* Fall through.  */
3306
 
3307
          /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3308
             entry only for local symbols.  Unfortunately, we don't know
3309
             until later on if there's a version script that forces the
3310
             symbol local.  We must have the .rela.got section in place
3311
             before we know if the symbol looks global now, so we need
3312
             to treat the reloc just like for R_CRIS_16_GOT and
3313
             R_CRIS_32_GOT.  */
3314
        case R_CRIS_16_GOTPLT:
3315
        case R_CRIS_32_GOTPLT:
3316
        case R_CRIS_16_GOT:
3317
        case R_CRIS_32_GOT:
3318
          if (srelgot == NULL
3319
              && (h != NULL || info->shared))
3320
            {
3321
              srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3322
              if (srelgot == NULL)
3323
                {
3324
                  srelgot = bfd_make_section_with_flags (dynobj,
3325
                                                         ".rela.got",
3326
                                                         (SEC_ALLOC
3327
                                                          | SEC_LOAD
3328
                                                          | SEC_HAS_CONTENTS
3329
                                                          | SEC_IN_MEMORY
3330
                                                          | SEC_LINKER_CREATED
3331
                                                          | SEC_READONLY));
3332
                  if (srelgot == NULL
3333
                      || !bfd_set_section_alignment (dynobj, srelgot, 2))
3334
                    return FALSE;
3335
                }
3336
            }
3337
          break;
3338
 
3339
        default:
3340
          break;
3341
        }
3342
 
3343
      /* Warn and error for invalid input.  */
3344
      switch (r_type)
3345
        {
3346
        case R_CRIS_32_IE:
3347
        case R_CRIS_32_TPREL:
3348
        case R_CRIS_16_TPREL:
3349
        case R_CRIS_32_GD:
3350
          if (info->shared)
3351
            {
3352
              (*_bfd_error_handler)
3353
                (_("%B, section %A:\n  relocation %s not valid"
3354
                   " in a shared object;"
3355
                   " typically an option mixup, recompile with -fPIC"),
3356
                 abfd,
3357
                 sec,
3358
                 cris_elf_howto_table[r_type].name);
3359
              /* Don't return FALSE here; we want messages for all of
3360
                 these and the error behavior is ungraceful
3361
                 anyway.  */
3362
            }
3363
        default:
3364
          break;
3365
        }
3366
 
3367
      switch (r_type)
3368
        {
3369
        case R_CRIS_32_GD:
3370
        case R_CRIS_16_GOT_GD:
3371
        case R_CRIS_32_GOT_GD:
3372
          /* These are requests for tls_index entries, run-time R_CRIS_DTP.  */
3373
          got_element_size = 8;
3374
          r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3375
          break;
3376
 
3377
        case R_CRIS_16_DTPREL:
3378
        case R_CRIS_32_DTPREL:
3379
          /* These two just request for the constant-index
3380
             module-local tls_index-sized GOT entry, which we add
3381
             elsewhere.  */
3382
          break;
3383
 
3384
        case R_CRIS_32_IE:
3385
        case R_CRIS_32_GOT_TPREL:
3386
        case R_CRIS_16_GOT_TPREL:
3387
          r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3388
 
3389
          /* Those relocs also require that a DSO is of type
3390
             Initial Exec.  Like other targets, we don't reset this
3391
             flag even if the relocs are GC:ed away.  */
3392
          if (info->shared)
3393
            info->flags |= DF_STATIC_TLS;
3394
          break;
3395
 
3396
          /* Let's list the other assembler-generated TLS-relocs too,
3397
             just to show that they're not forgotten. */
3398
        case R_CRIS_16_TPREL:
3399
        case R_CRIS_32_TPREL:
3400
        default:
3401
          break;
3402
        }
3403
 
3404
      switch (r_type)
3405
        {
3406
        case R_CRIS_16_GOTPLT:
3407
        case R_CRIS_32_GOTPLT:
3408
          /* Mark that we need a GOT entry if the PLT entry (and its GOT
3409
             entry) is eliminated.  We can only do this for a non-local
3410
             symbol.  */
3411
          if (h != NULL)
3412
            {
3413
              elf_cris_hash_entry (h)->gotplt_refcount++;
3414
              goto handle_gotplt_reloc;
3415
            }
3416
          /* If h is NULL then this is a local symbol, and we must make a
3417
             GOT entry for it, so handle it like a GOT reloc.  */
3418
          /* Fall through.  */
3419
 
3420
        case R_CRIS_32_IE:
3421
        case R_CRIS_32_GD:
3422
        case R_CRIS_16_GOT_GD:
3423
        case R_CRIS_32_GOT_GD:
3424
        case R_CRIS_32_GOT_TPREL:
3425
        case R_CRIS_16_GOT_TPREL:
3426
        case R_CRIS_16_GOT:
3427
        case R_CRIS_32_GOT:
3428
          /* This symbol requires a global offset table entry.  */
3429
          if (h != NULL)
3430
            {
3431
              if (h->got.refcount == 0)
3432
                {
3433
                  /* Make sure this symbol is output as a dynamic symbol.  */
3434
                  if (h->dynindx == -1)
3435
                    {
3436
                      if (!bfd_elf_link_record_dynamic_symbol (info, h))
3437
                        return FALSE;
3438
                    }
3439
                }
3440
 
3441
              /* Update the sum of reloc counts for this symbol.  */
3442
              h->got.refcount++;
3443
 
3444
              switch (r_type)
3445
                {
3446
                case R_CRIS_16_GOT:
3447
                case R_CRIS_32_GOT:
3448
                  if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3449
                    {
3450
                      /* Allocate space in the .got section.  */
3451
                      sgot->size += got_element_size;
3452
                      /* Allocate relocation space.  */
3453
                      srelgot->size += sizeof (Elf32_External_Rela);
3454
                    }
3455
                  elf_cris_hash_entry (h)->reg_got_refcount++;
3456
                  break;
3457
 
3458
                case R_CRIS_32_GD:
3459
                case R_CRIS_16_GOT_GD:
3460
                case R_CRIS_32_GOT_GD:
3461
                  if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3462
                    {
3463
                      /* Allocate space in the .got section.  */
3464
                      sgot->size += got_element_size;
3465
                      /* Allocate relocation space.  */
3466
                      srelgot->size += sizeof (Elf32_External_Rela);
3467
                    }
3468
                  elf_cris_hash_entry (h)->dtp_refcount++;
3469
                  break;
3470
 
3471
                case R_CRIS_32_IE:
3472
                case R_CRIS_32_GOT_TPREL:
3473
                case R_CRIS_16_GOT_TPREL:
3474
                  if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3475
                    {
3476
                      /* Allocate space in the .got section.  */
3477
                      sgot->size += got_element_size;
3478
                      /* Allocate relocation space.  */
3479
                      srelgot->size += sizeof (Elf32_External_Rela);
3480
                    }
3481
                  elf_cris_hash_entry (h)->tprel_refcount++;
3482
                  break;
3483
 
3484
                default:
3485
                  BFD_FAIL ();
3486
                  break;
3487
                }
3488
            }
3489
          else
3490
            {
3491
              /* This is a global offset table entry for a local symbol.  */
3492
              if (local_got_refcounts[r_symndx_lgot] == 0)
3493
                {
3494
                  sgot->size += got_element_size;
3495
                  if (info->shared)
3496
                    {
3497
                      /* If we are generating a shared object, we need
3498
                         to output a R_CRIS_RELATIVE reloc so that the
3499
                         dynamic linker can adjust this GOT entry.
3500
                         Similarly for non-regular got entries.  */
3501
                      srelgot->size += sizeof (Elf32_External_Rela);
3502
                    }
3503
                }
3504
              /* Update the reloc-specific count.  */
3505
              local_got_refcounts[r_symndx_lgot]++;
3506
 
3507
              /* This one is the sum of all the others.  */
3508
              local_got_refcounts[r_symndx]++;
3509
            }
3510
          break;
3511
 
3512
        case R_CRIS_16_DTPREL:
3513
        case R_CRIS_32_DTPREL:
3514
        case R_CRIS_32_GOTREL:
3515
          /* This reference requires a global offset table.
3516
             FIXME: The actual refcount isn't used currently; the .got
3517
             section can't be removed if there were any references in the
3518
             input.  */
3519
          local_got_refcounts[-1]++;
3520
          break;
3521
 
3522
        handle_gotplt_reloc:
3523
 
3524
        case R_CRIS_32_PLT_GOTREL:
3525
          /* This reference requires a global offset table.  */
3526
          local_got_refcounts[-1]++;
3527
          /* Fall through.  */
3528
 
3529
        case R_CRIS_32_PLT_PCREL:
3530
          /* This symbol requires a procedure linkage table entry.  We
3531
             actually build the entry in adjust_dynamic_symbol,
3532
             because this might be a case of linking PIC code which is
3533
             never referenced by a dynamic object, in which case we
3534
             don't need to generate a procedure linkage table entry
3535
             after all.  */
3536
 
3537
          /* Beware: if we'd check for visibility of the symbol here
3538
             (and not marking the need for a PLT when non-visible), we'd
3539
             get into trouble with keeping handling consistent with
3540
             regards to relocs found before definition and GOTPLT
3541
             handling.  Eliminable PLT entries will be dealt with later
3542
             anyway.  */
3543
          if (h == NULL)
3544
            continue;
3545
 
3546
          h->needs_plt = 1;
3547
          h->plt.refcount++;
3548
          break;
3549
 
3550
        case R_CRIS_8:
3551
        case R_CRIS_16:
3552
        case R_CRIS_32:
3553
          /* Let's help debug shared library creation.  Any of these
3554
             relocs *can* be used in shared libs, but pages containing
3555
             them cannot be shared, so they're not appropriate for
3556
             common use.  Don't warn for sections we don't care about,
3557
             such as debug sections or non-constant sections.  We
3558
             can't help tables of (global) function pointers, for
3559
             example, though they must be emitted in a (writable) data
3560
             section to avoid having impure text sections.  */
3561
          if (info->shared
3562
              && (sec->flags & SEC_ALLOC) != 0
3563
              && (sec->flags & SEC_READONLY) != 0)
3564
            {
3565
              /* FIXME: How do we make this optionally a warning only?  */
3566
              (*_bfd_error_handler)
3567
                (_("%B, section %A:\n  relocation %s should not"
3568
                   " be used in a shared object; recompile with -fPIC"),
3569
                 abfd,
3570
                 sec,
3571
                 cris_elf_howto_table[r_type].name);
3572
            }
3573
          if (h != NULL)
3574
            {
3575
              h->non_got_ref = 1;
3576
 
3577
              /* Make sure a plt entry is created for this symbol if it
3578
                 turns out to be a function defined by a dynamic object.  */
3579
              if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3580
                h->plt.refcount++;
3581
            }
3582
 
3583
          /* If we are creating a shared library and this is not a local
3584
             symbol, we need to copy the reloc into the shared library.
3585
             However when linking with -Bsymbolic and this is a global
3586
             symbol which is defined in an object we are including in the
3587
             link (i.e., DEF_REGULAR is set), then we can resolve the
3588
             reloc directly.  At this point we have not seen all the input
3589
             files, so it is possible that DEF_REGULAR is not set now but
3590
             will be set later (it is never cleared).  In case of a weak
3591
             definition, DEF_REGULAR may be cleared later by a strong
3592
             definition in a shared library.  We account for that
3593
             possibility below by storing information in the relocs_copied
3594
             field of the hash table entry.  A similar situation occurs
3595
             when creating shared libraries and symbol visibility changes
3596
             render the symbol local.  */
3597
 
3598
          /* No need to do anything if we're not creating a shared object.  */
3599
          if (! info->shared)
3600
            break;
3601
 
3602
          /* We don't need to handle relocs into sections not going into
3603
             the "real" output.  */
3604
          if ((sec->flags & SEC_ALLOC) == 0)
3605
            break;
3606
 
3607
          /* We may need to create a reloc section in the dynobj and made room
3608
             for this reloc.  */
3609
          if (sreloc == NULL)
3610
            {
3611
              sreloc = _bfd_elf_make_dynamic_reloc_section
3612
                (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3613
 
3614
              if (sreloc == NULL)
3615
                return FALSE;
3616
            }
3617
 
3618
          if (sec->flags & SEC_READONLY)
3619
            info->flags |= DF_TEXTREL;
3620
 
3621
          sreloc->size += sizeof (Elf32_External_Rela);
3622
          break;
3623
 
3624
        case R_CRIS_8_PCREL:
3625
        case R_CRIS_16_PCREL:
3626
        case R_CRIS_32_PCREL:
3627
          if (h != NULL)
3628
            {
3629
              h->non_got_ref = 1;
3630
 
3631
              /* Make sure a plt entry is created for this symbol if it
3632
                 turns out to be a function defined by a dynamic object.  */
3633
              if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3634
                h->plt.refcount++;
3635
            }
3636
 
3637
          /* If we are creating a shared library and this is not a local
3638
             symbol, we need to copy the reloc into the shared library.
3639
             However when linking with -Bsymbolic and this is a global
3640
             symbol which is defined in an object we are including in the
3641
             link (i.e., DEF_REGULAR is set), then we can resolve the
3642
             reloc directly.  At this point we have not seen all the input
3643
             files, so it is possible that DEF_REGULAR is not set now but
3644
             will be set later (it is never cleared).  In case of a weak
3645
             definition, DEF_REGULAR may be cleared later by a strong
3646
             definition in a shared library.  We account for that
3647
             possibility below by storing information in the relocs_copied
3648
             field of the hash table entry.  A similar situation occurs
3649
             when creating shared libraries and symbol visibility changes
3650
             render the symbol local.  */
3651
 
3652
          /* No need to do anything if we're not creating a shared object.  */
3653
          if (! info->shared)
3654
            break;
3655
 
3656
          /* We don't need to handle relocs into sections not going into
3657
             the "real" output.  */
3658
          if ((sec->flags & SEC_ALLOC) == 0)
3659
            break;
3660
 
3661
          /* If the symbol is local, then we know already we can
3662
             eliminate the reloc.  */
3663
          if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3664
            break;
3665
 
3666
          /* If this is with -Bsymbolic and the symbol isn't weak, and
3667
             is defined by an ordinary object (the ones we include in
3668
             this shared library) then we can also eliminate the
3669
             reloc.  See comment above for more eliminable cases which
3670
             we can't identify at this time.  */
3671
          if (info->symbolic
3672
              && h->root.type != bfd_link_hash_defweak
3673
              && h->def_regular)
3674
            break;
3675
 
3676
          /* We may need to create a reloc section in the dynobj and made room
3677
             for this reloc.  */
3678
          if (sreloc == NULL)
3679
            {
3680
              sreloc = _bfd_elf_make_dynamic_reloc_section
3681
                (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3682
 
3683
              if (sreloc == NULL)
3684
                return FALSE;
3685
            }
3686
 
3687
          sreloc->size += sizeof (Elf32_External_Rela);
3688
 
3689
          /* We count the number of PC relative relocations we have
3690
             entered for this symbol, so that we can discard them
3691
             again if the symbol is later defined by a regular object.
3692
             We know that h is really a pointer to an
3693
             elf_cris_link_hash_entry.  */
3694
          {
3695
            struct elf_cris_link_hash_entry *eh;
3696
            struct elf_cris_pcrel_relocs_copied *p;
3697
 
3698
            eh = elf_cris_hash_entry (h);
3699
 
3700
            for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3701
              if (p->section == sec)
3702
                break;
3703
 
3704
            if (p == NULL)
3705
              {
3706
                p = ((struct elf_cris_pcrel_relocs_copied *)
3707
                     bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3708
                if (p == NULL)
3709
                  return FALSE;
3710
                p->next = eh->pcrel_relocs_copied;
3711
                eh->pcrel_relocs_copied = p;
3712
                p->section = sec;
3713
                p->count = 0;
3714
                p->r_type = r_type;
3715
              }
3716
 
3717
            ++p->count;
3718
          }
3719
          break;
3720
 
3721
        /* This relocation describes the C++ object vtable hierarchy.
3722
           Reconstruct it for later use during GC.  */
3723
        case R_CRIS_GNU_VTINHERIT:
3724
          if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3725
            return FALSE;
3726
          break;
3727
 
3728
        /* This relocation describes which C++ vtable entries are actually
3729
           used.  Record for later use during GC.  */
3730
        case R_CRIS_GNU_VTENTRY:
3731
          BFD_ASSERT (h != NULL);
3732
          if (h != NULL
3733
              && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3734
            return FALSE;
3735
          break;
3736
 
3737
        case R_CRIS_16_TPREL:
3738
        case R_CRIS_32_TPREL:
3739
          /* Already warned above, when necessary.  */
3740
          break;
3741
 
3742
        default:
3743
          /* Other relocs do not appear here.  */
3744
          bfd_set_error (bfd_error_bad_value);
3745
          return FALSE;
3746
        }
3747
    }
3748
 
3749
  return TRUE;
3750
}
3751
 
3752
/* Set the sizes of the dynamic sections.  */
3753
 
3754
static bfd_boolean
3755
elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3756
                                struct bfd_link_info *info)
3757
{
3758
  struct elf_cris_link_hash_table * htab;
3759
  bfd *dynobj;
3760
  asection *s;
3761
  bfd_boolean plt;
3762
  bfd_boolean relocs;
3763
 
3764
  htab = elf_cris_hash_table (info);
3765
  if (htab == NULL)
3766
    return FALSE;
3767
 
3768
  dynobj = elf_hash_table (info)->dynobj;
3769
  BFD_ASSERT (dynobj != NULL);
3770
 
3771
  if (elf_hash_table (info)->dynamic_sections_created)
3772
    {
3773
      /* Set the contents of the .interp section to the interpreter.  */
3774
      if (info->executable)
3775
        {
3776
          s = bfd_get_section_by_name (dynobj, ".interp");
3777
          BFD_ASSERT (s != NULL);
3778
          s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3779
          s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3780
        }
3781
    }
3782
  else
3783
    {
3784
      /* Adjust all expected GOTPLT uses to use a GOT entry instead.  */
3785
      elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3786
                                   info);
3787
 
3788
      /* We may have created entries in the .rela.got section.
3789
         However, if we are not creating the dynamic sections, we will
3790
         not actually use these entries.  Reset the size of .rela.got,
3791
         which will cause it to get stripped from the output file
3792
         below.  */
3793
      s = bfd_get_section_by_name (dynobj, ".rela.got");
3794
      if (s != NULL)
3795
        s->size = 0;
3796
    }
3797
 
3798
  /* If this is a -Bsymbolic shared link, then we need to discard all PC
3799
     relative relocs against symbols defined in a regular object.  We
3800
     allocated space for them in the check_relocs routine, but we will not
3801
     fill them in in the relocate_section routine.  We also discard space
3802
     for relocs that have become for local symbols due to symbol
3803
     visibility changes.  For programs, we discard space for relocs for
3804
     symbols not referenced by any dynamic object.  */
3805
  if (info->shared)
3806
    elf_cris_link_hash_traverse (htab,
3807
                                 elf_cris_discard_excess_dso_dynamics,
3808
                                 info);
3809
  else
3810
    elf_cris_link_hash_traverse (htab,
3811
                                 elf_cris_discard_excess_program_dynamics,
3812
                                 info);
3813
 
3814
  /* The check_relocs and adjust_dynamic_symbol entry points have
3815
     determined the sizes of the various dynamic sections.  Allocate
3816
     memory for them.  */
3817
  plt = FALSE;
3818
  relocs = FALSE;
3819
  for (s = dynobj->sections; s != NULL; s = s->next)
3820
    {
3821
      const char *name;
3822
 
3823
      if ((s->flags & SEC_LINKER_CREATED) == 0)
3824
        continue;
3825
 
3826
      /* It's OK to base decisions on the section name, because none
3827
         of the dynobj section names depend upon the input files.  */
3828
      name = bfd_get_section_name (dynobj, s);
3829
 
3830
      if (strcmp (name, ".plt") == 0)
3831
        {
3832
          /* Remember whether there is a PLT.  */
3833
          plt = s->size != 0;
3834
        }
3835
      else if (strcmp (name, ".got.plt") == 0)
3836
        {
3837
          /* The .got.plt contains the .got header as well as the
3838
             actual .got.plt contents.  The .got header may contain a
3839
             R_CRIS_DTPMOD entry at index 3.  */
3840
          s->size += htab->dtpmod_refcount != 0
3841
            ? 8 : 0;
3842
        }
3843
      else if (CONST_STRNEQ (name, ".rela"))
3844
        {
3845
          if (strcmp (name, ".rela.got") == 0
3846
              && htab->dtpmod_refcount != 0
3847
              && info->shared)
3848
            s->size += sizeof (Elf32_External_Rela);
3849
 
3850
          if (s->size != 0)
3851
            {
3852
              /* Remember whether there are any reloc sections other
3853
                 than .rela.plt.  */
3854
              if (strcmp (name, ".rela.plt") != 0)
3855
                  relocs = TRUE;
3856
 
3857
              /* We use the reloc_count field as a counter if we need
3858
                 to copy relocs into the output file.  */
3859
              s->reloc_count = 0;
3860
            }
3861
        }
3862
      else if (! CONST_STRNEQ (name, ".got")
3863
               && strcmp (name, ".dynbss") != 0)
3864
        {
3865
          /* It's not one of our sections, so don't allocate space.  */
3866
          continue;
3867
        }
3868
 
3869
      if (s->size == 0)
3870
        {
3871
          /* If we don't need this section, strip it from the
3872
             output file.  This is mostly to handle .rela.bss and
3873
             .rela.plt.  We must create both sections in
3874
             create_dynamic_sections, because they must be created
3875
             before the linker maps input sections to output
3876
             sections.  The linker does that before
3877
             adjust_dynamic_symbol is called, and it is that
3878
             function which decides whether anything needs to go
3879
             into these sections.  */
3880
          s->flags |= SEC_EXCLUDE;
3881
          continue;
3882
        }
3883
 
3884
      if ((s->flags & SEC_HAS_CONTENTS) == 0)
3885
        continue;
3886
 
3887
      /* Allocate memory for the section contents. We use bfd_zalloc here
3888
         in case unused entries are not reclaimed before the section's
3889
         contents are written out.  This should not happen, but this way
3890
         if it does, we will not write out garbage.  For reloc sections,
3891
         this will make entries have the type R_CRIS_NONE.  */
3892
      s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3893
      if (s->contents == NULL)
3894
        return FALSE;
3895
    }
3896
 
3897
  if (elf_hash_table (info)->dynamic_sections_created)
3898
    {
3899
      /* Add some entries to the .dynamic section.  We fill in the
3900
         values later, in elf_cris_finish_dynamic_sections, but we
3901
         must add the entries now so that we get the correct size for
3902
         the .dynamic section.  The DT_DEBUG entry is filled in by the
3903
         dynamic linker and used by the debugger.  */
3904
#define add_dynamic_entry(TAG, VAL) \
3905
  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3906
 
3907
      if (!info->shared)
3908
        {
3909
          if (!add_dynamic_entry (DT_DEBUG, 0))
3910
            return FALSE;
3911
        }
3912
 
3913
      if (plt)
3914
        {
3915
          if (!add_dynamic_entry (DT_PLTGOT, 0)
3916
              || !add_dynamic_entry (DT_PLTRELSZ, 0)
3917
              || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3918
              || !add_dynamic_entry (DT_JMPREL, 0))
3919
            return FALSE;
3920
        }
3921
 
3922
      if (relocs)
3923
        {
3924
          if (!add_dynamic_entry (DT_RELA, 0)
3925
              || !add_dynamic_entry (DT_RELASZ, 0)
3926
              || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3927
            return FALSE;
3928
        }
3929
 
3930
      if ((info->flags & DF_TEXTREL) != 0)
3931
        {
3932
          if (!add_dynamic_entry (DT_TEXTREL, 0))
3933
            return FALSE;
3934
          info->flags |= DF_TEXTREL;
3935
        }
3936
    }
3937
#undef add_dynamic_entry
3938
 
3939
  return TRUE;
3940
}
3941
 
3942
/* This function is called via elf_cris_link_hash_traverse if we are
3943
   creating a shared object.  In the -Bsymbolic case, it discards the
3944
   space allocated to copy PC relative relocs against symbols which
3945
   are defined in regular objects.  For the normal non-symbolic case,
3946
   we also discard space for relocs that have become local due to
3947
   symbol visibility changes.  We allocated space for them in the
3948
   check_relocs routine, but we won't fill them in in the
3949
   relocate_section routine.  */
3950
 
3951
static bfd_boolean
3952
elf_cris_discard_excess_dso_dynamics (h, inf)
3953
     struct elf_cris_link_hash_entry *h;
3954
     PTR inf;
3955
{
3956
  struct elf_cris_pcrel_relocs_copied *s;
3957
  struct bfd_link_info *info = (struct bfd_link_info *) inf;
3958
 
3959
  if (h->root.root.type == bfd_link_hash_warning)
3960
    h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3961
 
3962
  /* If a symbol has been forced local or we have found a regular
3963
     definition for the symbolic link case, then we won't be needing
3964
     any relocs.  */
3965
  if (h->root.def_regular
3966
      && (h->root.forced_local
3967
          || info->symbolic))
3968
    {
3969
      for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3970
        {
3971
          asection *sreloc
3972
            = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3973
                                                  ->dynobj,
3974
                                                  s->section,
3975
                                                  /*rela?*/ TRUE);
3976
          sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3977
        }
3978
      return TRUE;
3979
    }
3980
 
3981
  /* If we have accounted for PC-relative relocs for read-only
3982
     sections, now is the time to warn for them.  We can't do it in
3983
     cris_elf_check_relocs, because we don't know the status of all
3984
     symbols at that time (and it's common to force symbols local
3985
     late).  */
3986
 
3987
  for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3988
    if ((s->section->flags & SEC_READONLY) != 0)
3989
      {
3990
        /* FIXME: How do we make this optionally a warning only?  */
3991
        (*_bfd_error_handler)
3992
          (_("%B, section `%A', to symbol `%s':\n"
3993
             "  relocation %s should not be used"
3994
             " in a shared object; recompile with -fPIC"),
3995
           s->section->owner,
3996
           s->section,
3997
           h->root.root.root.string,
3998
           cris_elf_howto_table[s->r_type].name);
3999
 
4000
        info->flags |= DF_TEXTREL;
4001
      }
4002
 
4003
  return TRUE;
4004
}
4005
 
4006
/* This function is called via elf_cris_link_hash_traverse if we are *not*
4007
   creating a shared object.  We discard space for relocs for symbols put
4008
   in the .got, but which we found we do not have to resolve at run-time.  */
4009
 
4010
static bfd_boolean
4011
elf_cris_discard_excess_program_dynamics (h, inf)
4012
     struct elf_cris_link_hash_entry *h;
4013
     PTR inf;
4014
{
4015
  struct bfd_link_info *info = (struct bfd_link_info *) inf;
4016
 
4017
  if (h->root.root.type == bfd_link_hash_warning)
4018
    h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
4019
 
4020
  /* If we're not creating a shared library and have a symbol which is
4021
     referred to by .got references, but the symbol is defined locally,
4022
     (or rather, not defined by a DSO) then lose the reloc for the .got
4023
     (don't allocate room for it).  Likewise for relocs for something
4024
     for which we create a PLT.  */
4025
  if (!h->root.def_dynamic
4026
      || h->root.plt.refcount > 0)
4027
    {
4028
      if (h->reg_got_refcount > 0
4029
          /* The size of this section is only valid and in sync with the
4030
             various reference counts if we do dynamic; don't decrement it
4031
             otherwise.  */
4032
          && elf_hash_table (info)->dynamic_sections_created)
4033
        {
4034
          bfd *dynobj = elf_hash_table (info)->dynobj;
4035
          asection *srelgot;
4036
 
4037
          BFD_ASSERT (dynobj != NULL);
4038
 
4039
          srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
4040
 
4041
          BFD_ASSERT (srelgot != NULL);
4042
 
4043
          srelgot->size -= sizeof (Elf32_External_Rela);
4044
        }
4045
 
4046
      /* If the locally-defined symbol isn't used by a DSO, then we don't
4047
         have to export it as a dynamic symbol.  This was already done for
4048
         functions; doing this for all symbols would presumably not
4049
         introduce new problems.  Of course we don't do this if we're
4050
         exporting all dynamic symbols.  */
4051
      if (! info->export_dynamic
4052
          && h->root.dynindx != -1
4053
          && !h->root.def_dynamic
4054
          && !h->root.ref_dynamic)
4055
        {
4056
          h->root.dynindx = -1;
4057
          _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4058
                                  h->root.dynstr_index);
4059
        }
4060
    }
4061
 
4062
  return TRUE;
4063
}
4064
 
4065
/* Reject a file depending on presence and expectation of prefixed
4066
   underscores on symbols.  */
4067
 
4068
static bfd_boolean
4069
cris_elf_object_p (abfd)
4070
     bfd *abfd;
4071
{
4072
  if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4073
    return FALSE;
4074
 
4075
  if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4076
    return (bfd_get_symbol_leading_char (abfd) == '_');
4077
  else
4078
    return (bfd_get_symbol_leading_char (abfd) == 0);
4079
}
4080
 
4081
/* Mark presence or absence of leading underscore.  Set machine type
4082
   flags from mach type.  */
4083
 
4084
static void
4085
cris_elf_final_write_processing (abfd, linker)
4086
     bfd *abfd;
4087
     bfd_boolean linker ATTRIBUTE_UNUSED;
4088
{
4089
  unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4090
 
4091
  e_flags &= ~EF_CRIS_UNDERSCORE;
4092
  if (bfd_get_symbol_leading_char (abfd) == '_')
4093
    e_flags |= EF_CRIS_UNDERSCORE;
4094
 
4095
  switch (bfd_get_mach (abfd))
4096
    {
4097
    case bfd_mach_cris_v0_v10:
4098
      e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4099
      break;
4100
 
4101
    case bfd_mach_cris_v10_v32:
4102
      e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4103
      break;
4104
 
4105
    case bfd_mach_cris_v32:
4106
      e_flags |= EF_CRIS_VARIANT_V32;
4107
      break;
4108
 
4109
    default:
4110
      _bfd_abort (__FILE__, __LINE__,
4111
                  _("Unexpected machine number"));
4112
    }
4113
 
4114
  elf_elfheader (abfd)->e_flags = e_flags;
4115
}
4116
 
4117
/* Set the mach type from e_flags value.  */
4118
 
4119
static bfd_boolean
4120
cris_elf_set_mach_from_flags (abfd, flags)
4121
     bfd *abfd;
4122
     unsigned long flags;
4123
{
4124
  switch (flags & EF_CRIS_VARIANT_MASK)
4125
    {
4126
    case EF_CRIS_VARIANT_ANY_V0_V10:
4127
      bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4128
      break;
4129
 
4130
    case EF_CRIS_VARIANT_V32:
4131
      bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4132
      break;
4133
 
4134
    case EF_CRIS_VARIANT_COMMON_V10_V32:
4135
      bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4136
      break;
4137
 
4138
    default:
4139
      /* Since we don't recognize them, we obviously can't support them
4140
         with this code; we'd have to require that all future handling
4141
         would be optional.  */
4142
      bfd_set_error (bfd_error_wrong_format);
4143
      return FALSE;
4144
    }
4145
 
4146
  return TRUE;
4147
}
4148
 
4149
/* Display the flags field.  */
4150
 
4151
static bfd_boolean
4152
cris_elf_print_private_bfd_data (abfd, ptr)
4153
     bfd *abfd;
4154
     PTR ptr;
4155
{
4156
  FILE *file = (FILE *) ptr;
4157
 
4158
  BFD_ASSERT (abfd != NULL && ptr != NULL);
4159
 
4160
  _bfd_elf_print_private_bfd_data (abfd, ptr);
4161
 
4162
  fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4163
 
4164
  if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4165
    fprintf (file, _(" [symbols have a _ prefix]"));
4166
  if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4167
      == EF_CRIS_VARIANT_COMMON_V10_V32)
4168
    fprintf (file, _(" [v10 and v32]"));
4169
  if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4170
      == EF_CRIS_VARIANT_V32)
4171
    fprintf (file, _(" [v32]"));
4172
 
4173
  fputc ('\n', file);
4174
  return TRUE;
4175
}
4176
 
4177
/* Don't mix files with and without a leading underscore.  */
4178
 
4179
static bfd_boolean
4180
cris_elf_merge_private_bfd_data (ibfd, obfd)
4181
     bfd *ibfd;
4182
     bfd *obfd;
4183
{
4184
  int imach, omach;
4185
 
4186
  if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4187
    return FALSE;
4188
 
4189
  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4190
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4191
    return TRUE;
4192
 
4193
  imach = bfd_get_mach (ibfd);
4194
 
4195
  if (! elf_flags_init (obfd))
4196
    {
4197
      /* This happens when ld starts out with a 'blank' output file.  */
4198
      elf_flags_init (obfd) = TRUE;
4199
 
4200
      /* We ignore the linker-set mach, and instead set it according to
4201
         the first input file.  This would also happen if we could
4202
         somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4203
         This allows us to keep the same linker config across
4204
         cris(v0..v10) and crisv32.  The drawback is that we can't force
4205
         the output type, which might be a sane thing to do for a
4206
         v10+v32 compatibility object.  */
4207
      if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4208
        return FALSE;
4209
    }
4210
 
4211
  if (bfd_get_symbol_leading_char (ibfd)
4212
      != bfd_get_symbol_leading_char (obfd))
4213
    {
4214
      (*_bfd_error_handler)
4215
        (bfd_get_symbol_leading_char (ibfd) == '_'
4216
         ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4217
         : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4218
         ibfd);
4219
      bfd_set_error (bfd_error_bad_value);
4220
      return FALSE;
4221
    }
4222
 
4223
  omach = bfd_get_mach (obfd);
4224
 
4225
  if (imach != omach)
4226
    {
4227
      /* We can get an incompatible combination only if either is
4228
         bfd_mach_cris_v32, and the other one isn't compatible.  */
4229
      if ((imach == bfd_mach_cris_v32
4230
           && omach != bfd_mach_cris_v10_v32)
4231
          || (omach == bfd_mach_cris_v32
4232
              && imach != bfd_mach_cris_v10_v32))
4233
        {
4234
          (*_bfd_error_handler)
4235
            ((imach == bfd_mach_cris_v32)
4236
             ? _("%B contains CRIS v32 code, incompatible"
4237
                 " with previous objects")
4238
             : _("%B contains non-CRIS-v32 code, incompatible"
4239
                 " with previous objects"),
4240
             ibfd);
4241
          bfd_set_error (bfd_error_bad_value);
4242
          return FALSE;
4243
        }
4244
 
4245
      /* We don't have to check the case where the input is compatible
4246
         with v10 and v32, because the output is already known to be set
4247
         to the other (compatible) mach.  */
4248
      if (omach == bfd_mach_cris_v10_v32
4249
          && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4250
        return FALSE;
4251
    }
4252
 
4253
  return TRUE;
4254
}
4255
 
4256
/* Do side-effects of e_flags copying to obfd.  */
4257
 
4258
static bfd_boolean
4259
cris_elf_copy_private_bfd_data (ibfd, obfd)
4260
     bfd *ibfd;
4261
     bfd *obfd;
4262
{
4263
  /* Call the base function.  */
4264
  if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4265
    return FALSE;
4266
 
4267
  /* If output is big-endian for some obscure reason, stop here.  */
4268
  if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4269
    return FALSE;
4270
 
4271
  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4272
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4273
    return TRUE;
4274
 
4275
  /* Do what we really came here for.  */
4276
  return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4277
}
4278
 
4279
static enum elf_reloc_type_class
4280
elf_cris_reloc_type_class (rela)
4281
     const Elf_Internal_Rela *rela;
4282
{
4283
  enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4284
  switch (r_type)
4285
    {
4286
    case R_CRIS_RELATIVE:
4287
      return reloc_class_relative;
4288
    case R_CRIS_JUMP_SLOT:
4289
      return reloc_class_plt;
4290
    case R_CRIS_COPY:
4291
      return reloc_class_copy;
4292
    default:
4293
      return reloc_class_normal;
4294
    }
4295
}
4296
 
4297
/* The elf_backend_got_elt_size worker.  For one symbol, we can have up to
4298
   two GOT entries from three types with two different sizes.  We handle
4299
   it as a single entry, so we can use the regular offset-calculation
4300
   machinery.  */
4301
 
4302
static bfd_vma
4303
elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4304
                       struct bfd_link_info *info ATTRIBUTE_UNUSED,
4305
                       struct elf_link_hash_entry *hr,
4306
                       bfd *ibfd,
4307
                       unsigned long symndx)
4308
{
4309
  struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4310
  bfd_vma eltsiz = 0;
4311
 
4312
  /* We may have one regular GOT entry or up to two TLS GOT
4313
     entries.  */
4314
  if (h == NULL)
4315
    {
4316
      Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4317
      bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4318
 
4319
      BFD_ASSERT (local_got_refcounts != NULL);
4320
 
4321
      if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4322
        {
4323
          /* We can't have a variable referred to both as a regular
4324
             variable and through TLS relocs.  */
4325
          BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4326
                      && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4327
          return 4;
4328
        }
4329
 
4330
      if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4331
        eltsiz += 8;
4332
 
4333
      if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4334
        eltsiz += 4;
4335
    }
4336
  else
4337
    {
4338
      struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4339
      if (hh->reg_got_refcount > 0)
4340
        {
4341
          /* The actual error-on-input is emitted elsewhere.  */
4342
          BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4343
          return 4;
4344
        }
4345
 
4346
      if (hh->dtp_refcount > 0)
4347
        eltsiz += 8;
4348
 
4349
      if (hh->tprel_refcount > 0)
4350
        eltsiz += 4;
4351
    }
4352
 
4353
  /* We're only called when h->got.refcount is non-zero, so we must
4354
     have a non-zero size.  */
4355
  BFD_ASSERT (eltsiz != 0);
4356
  return eltsiz;
4357
}
4358
 
4359
#define ELF_ARCH                bfd_arch_cris
4360
#define ELF_TARGET_ID           CRIS_ELF_DATA
4361
#define ELF_MACHINE_CODE        EM_CRIS
4362
#define ELF_MAXPAGESIZE         0x2000
4363
 
4364
#define TARGET_LITTLE_SYM       bfd_elf32_cris_vec
4365
#define TARGET_LITTLE_NAME      "elf32-cris"
4366
#define elf_symbol_leading_char 0
4367
 
4368
#define elf_info_to_howto_rel                   NULL
4369
#define elf_info_to_howto                       cris_info_to_howto_rela
4370
#define elf_backend_relocate_section            cris_elf_relocate_section
4371
#define elf_backend_gc_mark_hook                cris_elf_gc_mark_hook
4372
#define elf_backend_gc_sweep_hook               cris_elf_gc_sweep_hook
4373
#define elf_backend_plt_sym_val                 cris_elf_plt_sym_val
4374
#define elf_backend_check_relocs                cris_elf_check_relocs
4375
#define elf_backend_grok_prstatus               cris_elf_grok_prstatus
4376
#define elf_backend_grok_psinfo                 cris_elf_grok_psinfo
4377
 
4378
#define elf_backend_can_gc_sections             1
4379
#define elf_backend_can_refcount                1
4380
 
4381
#define elf_backend_object_p                    cris_elf_object_p
4382
#define elf_backend_final_write_processing \
4383
        cris_elf_final_write_processing
4384
#define bfd_elf32_bfd_print_private_bfd_data \
4385
        cris_elf_print_private_bfd_data
4386
#define bfd_elf32_bfd_merge_private_bfd_data \
4387
        cris_elf_merge_private_bfd_data
4388
#define bfd_elf32_bfd_copy_private_bfd_data \
4389
        cris_elf_copy_private_bfd_data
4390
 
4391
#define bfd_elf32_bfd_reloc_type_lookup         cris_reloc_type_lookup
4392
#define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4393
 
4394
#define bfd_elf32_bfd_link_hash_table_create \
4395
        elf_cris_link_hash_table_create
4396
#define elf_backend_adjust_dynamic_symbol \
4397
        elf_cris_adjust_dynamic_symbol
4398
#define elf_backend_copy_indirect_symbol \
4399
        elf_cris_copy_indirect_symbol
4400
#define elf_backend_size_dynamic_sections \
4401
        elf_cris_size_dynamic_sections
4402
#define elf_backend_init_index_section          _bfd_elf_init_1_index_section
4403
#define elf_backend_finish_dynamic_symbol \
4404
        elf_cris_finish_dynamic_symbol
4405
#define elf_backend_finish_dynamic_sections \
4406
        elf_cris_finish_dynamic_sections
4407
#define elf_backend_create_dynamic_sections \
4408
        _bfd_elf_create_dynamic_sections
4409
#define bfd_elf32_bfd_final_link \
4410
        bfd_elf_gc_common_final_link
4411
#define elf_backend_hide_symbol                 elf_cris_hide_symbol
4412
#define elf_backend_reloc_type_class            elf_cris_reloc_type_class
4413
 
4414
#define elf_backend_want_got_plt        1
4415
#define elf_backend_plt_readonly        1
4416
#define elf_backend_want_plt_sym        0
4417
#define elf_backend_got_header_size     12
4418
#define elf_backend_got_elt_size elf_cris_got_elt_size
4419
 
4420
/* Later, we my want to optimize RELA entries into REL entries for dynamic
4421
   linking and libraries (if it's a win of any significance).  Until then,
4422
   take the easy route.  */
4423
#define elf_backend_may_use_rel_p 0
4424
#define elf_backend_may_use_rela_p 1
4425
#define elf_backend_rela_normal         1
4426
 
4427
#include "elf32-target.h"
4428
 
4429
#undef TARGET_LITTLE_SYM
4430
#undef TARGET_LITTLE_NAME
4431
#undef elf_symbol_leading_char
4432
 
4433
#define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
4434
#define TARGET_LITTLE_NAME "elf32-us-cris"
4435
#define elf_symbol_leading_char '_'
4436
#undef elf32_bed
4437
#define elf32_bed elf32_us_cris_bed
4438
 
4439
#include "elf32-target.h"

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