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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [bfd/] [elf32-m68k.c] - Blame information for rev 117

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1 14 khays
/* Motorola 68k series support for 32-bit ELF
2
   Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3
   2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4
 
5
   This file is part of BFD, the Binary File Descriptor library.
6
 
7
   This program is free software; you can redistribute it and/or modify
8
   it under the terms of the GNU General Public License as published by
9
   the Free Software Foundation; either version 3 of the License, or
10
   (at your option) any later version.
11
 
12
   This program is distributed in the hope that it will be useful,
13
   but WITHOUT ANY WARRANTY; without even the implied warranty of
14
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15
   GNU General Public License for more details.
16
 
17
   You should have received a copy of the GNU General Public License
18
   along with this program; if not, write to the Free Software
19
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20
   MA 02110-1301, USA.  */
21
 
22
#include "sysdep.h"
23
#include "bfd.h"
24
#include "bfdlink.h"
25
#include "libbfd.h"
26
#include "elf-bfd.h"
27
#include "elf/m68k.h"
28
#include "opcode/m68k.h"
29
 
30
static reloc_howto_type *reloc_type_lookup
31
  PARAMS ((bfd *, bfd_reloc_code_real_type));
32
static void rtype_to_howto
33
  PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
34
static struct bfd_hash_entry *elf_m68k_link_hash_newfunc
35
  PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36
static struct bfd_link_hash_table *elf_m68k_link_hash_table_create
37
  PARAMS ((bfd *));
38
static bfd_boolean elf_m68k_check_relocs
39
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
40
           const Elf_Internal_Rela *));
41
static bfd_boolean elf_m68k_adjust_dynamic_symbol
42
  PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
43
static bfd_boolean elf_m68k_size_dynamic_sections
44
  PARAMS ((bfd *, struct bfd_link_info *));
45
static bfd_boolean elf_m68k_discard_copies
46
  PARAMS ((struct elf_link_hash_entry *, PTR));
47
static bfd_boolean elf_m68k_relocate_section
48
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
49
           Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
50
static bfd_boolean elf_m68k_finish_dynamic_symbol
51
  PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
52
           Elf_Internal_Sym *));
53
static bfd_boolean elf_m68k_finish_dynamic_sections
54
  PARAMS ((bfd *, struct bfd_link_info *));
55
 
56
static bfd_boolean elf32_m68k_set_private_flags
57
  PARAMS ((bfd *, flagword));
58
static bfd_boolean elf32_m68k_merge_private_bfd_data
59
  PARAMS ((bfd *, bfd *));
60
static bfd_boolean elf32_m68k_print_private_bfd_data
61
  PARAMS ((bfd *, PTR));
62
static enum elf_reloc_type_class elf32_m68k_reloc_type_class
63
  PARAMS ((const Elf_Internal_Rela *));
64
 
65
static reloc_howto_type howto_table[] = {
66
  HOWTO(R_68K_NONE,       0, 0, 0, FALSE,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_NONE",      FALSE, 0, 0x00000000,FALSE),
67
  HOWTO(R_68K_32,         0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32",        FALSE, 0, 0xffffffff,FALSE),
68
  HOWTO(R_68K_16,         0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16",        FALSE, 0, 0x0000ffff,FALSE),
69
  HOWTO(R_68K_8,          0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8",         FALSE, 0, 0x000000ff,FALSE),
70
  HOWTO(R_68K_PC32,       0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32",      FALSE, 0, 0xffffffff,TRUE),
71
  HOWTO(R_68K_PC16,       0, 1,16, TRUE, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PC16",      FALSE, 0, 0x0000ffff,TRUE),
72
  HOWTO(R_68K_PC8,        0, 0, 8, TRUE, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PC8",       FALSE, 0, 0x000000ff,TRUE),
73
  HOWTO(R_68K_GOT32,      0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32",     FALSE, 0, 0xffffffff,TRUE),
74
  HOWTO(R_68K_GOT16,      0, 1,16, TRUE, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT16",     FALSE, 0, 0x0000ffff,TRUE),
75
  HOWTO(R_68K_GOT8,       0, 0, 8, TRUE, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT8",      FALSE, 0, 0x000000ff,TRUE),
76
  HOWTO(R_68K_GOT32O,     0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O",    FALSE, 0, 0xffffffff,FALSE),
77
  HOWTO(R_68K_GOT16O,     0, 1,16, FALSE,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT16O",    FALSE, 0, 0x0000ffff,FALSE),
78
  HOWTO(R_68K_GOT8O,      0, 0, 8, FALSE,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT8O",     FALSE, 0, 0x000000ff,FALSE),
79
  HOWTO(R_68K_PLT32,      0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32",     FALSE, 0, 0xffffffff,TRUE),
80
  HOWTO(R_68K_PLT16,      0, 1,16, TRUE, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT16",     FALSE, 0, 0x0000ffff,TRUE),
81
  HOWTO(R_68K_PLT8,       0, 0, 8, TRUE, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT8",      FALSE, 0, 0x000000ff,TRUE),
82
  HOWTO(R_68K_PLT32O,     0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O",    FALSE, 0, 0xffffffff,FALSE),
83
  HOWTO(R_68K_PLT16O,     0, 1,16, FALSE,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT16O",    FALSE, 0, 0x0000ffff,FALSE),
84
  HOWTO(R_68K_PLT8O,      0, 0, 8, FALSE,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT8O",     FALSE, 0, 0x000000ff,FALSE),
85
  HOWTO(R_68K_COPY,       0, 0, 0, FALSE,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_COPY",      FALSE, 0, 0xffffffff,FALSE),
86
  HOWTO(R_68K_GLOB_DAT,   0, 2,32, FALSE,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_GLOB_DAT",  FALSE, 0, 0xffffffff,FALSE),
87
  HOWTO(R_68K_JMP_SLOT,   0, 2,32, FALSE,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_JMP_SLOT",  FALSE, 0, 0xffffffff,FALSE),
88
  HOWTO(R_68K_RELATIVE,   0, 2,32, FALSE,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_RELATIVE",  FALSE, 0, 0xffffffff,FALSE),
89
  /* GNU extension to record C++ vtable hierarchy.  */
90
  HOWTO (R_68K_GNU_VTINHERIT,   /* type */
91
         0,                      /* rightshift */
92
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
93
         0,                      /* bitsize */
94
         FALSE,                 /* pc_relative */
95
         0,                      /* bitpos */
96
         complain_overflow_dont, /* complain_on_overflow */
97
         NULL,                  /* special_function */
98
         "R_68K_GNU_VTINHERIT", /* name */
99
         FALSE,                 /* partial_inplace */
100
         0,                      /* src_mask */
101
         0,                      /* dst_mask */
102
         FALSE),
103
  /* GNU extension to record C++ vtable member usage.  */
104
  HOWTO (R_68K_GNU_VTENTRY,     /* type */
105
         0,                      /* rightshift */
106
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
107
         0,                      /* bitsize */
108
         FALSE,                 /* pc_relative */
109
         0,                      /* bitpos */
110
         complain_overflow_dont, /* complain_on_overflow */
111
         _bfd_elf_rel_vtable_reloc_fn, /* special_function */
112
         "R_68K_GNU_VTENTRY",   /* name */
113
         FALSE,                 /* partial_inplace */
114
         0,                      /* src_mask */
115
         0,                      /* dst_mask */
116
         FALSE),
117
 
118
  /* TLS general dynamic variable reference.  */
119
  HOWTO (R_68K_TLS_GD32,        /* type */
120
         0,                      /* rightshift */
121
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
122
         32,                    /* bitsize */
123
         FALSE,                 /* pc_relative */
124
         0,                      /* bitpos */
125
         complain_overflow_bitfield, /* complain_on_overflow */
126
         bfd_elf_generic_reloc, /* special_function */
127
         "R_68K_TLS_GD32",      /* name */
128
         FALSE,                 /* partial_inplace */
129
         0,                      /* src_mask */
130
         0xffffffff,            /* dst_mask */
131
         FALSE),                /* pcrel_offset */
132
 
133
  HOWTO (R_68K_TLS_GD16,        /* type */
134
         0,                      /* rightshift */
135
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
136
         16,                    /* bitsize */
137
         FALSE,                 /* pc_relative */
138
         0,                      /* bitpos */
139
         complain_overflow_signed, /* complain_on_overflow */
140
         bfd_elf_generic_reloc, /* special_function */
141
         "R_68K_TLS_GD16",      /* name */
142
         FALSE,                 /* partial_inplace */
143
         0,                      /* src_mask */
144
         0x0000ffff,            /* dst_mask */
145
         FALSE),                /* pcrel_offset */
146
 
147
  HOWTO (R_68K_TLS_GD8,         /* type */
148
         0,                      /* rightshift */
149
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
150
         8,                     /* bitsize */
151
         FALSE,                 /* pc_relative */
152
         0,                      /* bitpos */
153
         complain_overflow_signed, /* complain_on_overflow */
154
         bfd_elf_generic_reloc, /* special_function */
155
         "R_68K_TLS_GD8",       /* name */
156
         FALSE,                 /* partial_inplace */
157
         0,                      /* src_mask */
158
         0x000000ff,            /* dst_mask */
159
         FALSE),                /* pcrel_offset */
160
 
161
  /* TLS local dynamic variable reference.  */
162
  HOWTO (R_68K_TLS_LDM32,       /* type */
163
         0,                      /* rightshift */
164
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
165
         32,                    /* bitsize */
166
         FALSE,                 /* pc_relative */
167
         0,                      /* bitpos */
168
         complain_overflow_bitfield, /* complain_on_overflow */
169
         bfd_elf_generic_reloc, /* special_function */
170
         "R_68K_TLS_LDM32",     /* name */
171
         FALSE,                 /* partial_inplace */
172
         0,                      /* src_mask */
173
         0xffffffff,            /* dst_mask */
174
         FALSE),                /* pcrel_offset */
175
 
176
  HOWTO (R_68K_TLS_LDM16,       /* type */
177
         0,                      /* rightshift */
178
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
179
         16,                    /* bitsize */
180
         FALSE,                 /* pc_relative */
181
         0,                      /* bitpos */
182
         complain_overflow_signed, /* complain_on_overflow */
183
         bfd_elf_generic_reloc, /* special_function */
184
         "R_68K_TLS_LDM16",     /* name */
185
         FALSE,                 /* partial_inplace */
186
         0,                      /* src_mask */
187
         0x0000ffff,            /* dst_mask */
188
         FALSE),                /* pcrel_offset */
189
 
190
  HOWTO (R_68K_TLS_LDM8,                /* type */
191
         0,                      /* rightshift */
192
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
193
         8,                     /* bitsize */
194
         FALSE,                 /* pc_relative */
195
         0,                      /* bitpos */
196
         complain_overflow_signed, /* complain_on_overflow */
197
         bfd_elf_generic_reloc, /* special_function */
198
         "R_68K_TLS_LDM8",      /* name */
199
         FALSE,                 /* partial_inplace */
200
         0,                      /* src_mask */
201
         0x000000ff,            /* dst_mask */
202
         FALSE),                /* pcrel_offset */
203
 
204
  HOWTO (R_68K_TLS_LDO32,       /* type */
205
         0,                      /* rightshift */
206
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
207
         32,                    /* bitsize */
208
         FALSE,                 /* pc_relative */
209
         0,                      /* bitpos */
210
         complain_overflow_bitfield, /* complain_on_overflow */
211
         bfd_elf_generic_reloc, /* special_function */
212
         "R_68K_TLS_LDO32",     /* name */
213
         FALSE,                 /* partial_inplace */
214
         0,                      /* src_mask */
215
         0xffffffff,            /* dst_mask */
216
         FALSE),                /* pcrel_offset */
217
 
218
  HOWTO (R_68K_TLS_LDO16,       /* type */
219
         0,                      /* rightshift */
220
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
221
         16,                    /* bitsize */
222
         FALSE,                 /* pc_relative */
223
         0,                      /* bitpos */
224
         complain_overflow_signed, /* complain_on_overflow */
225
         bfd_elf_generic_reloc, /* special_function */
226
         "R_68K_TLS_LDO16",     /* name */
227
         FALSE,                 /* partial_inplace */
228
         0,                      /* src_mask */
229
         0x0000ffff,            /* dst_mask */
230
         FALSE),                /* pcrel_offset */
231
 
232
  HOWTO (R_68K_TLS_LDO8,                /* type */
233
         0,                      /* rightshift */
234
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
235
         8,                     /* bitsize */
236
         FALSE,                 /* pc_relative */
237
         0,                      /* bitpos */
238
         complain_overflow_signed, /* complain_on_overflow */
239
         bfd_elf_generic_reloc, /* special_function */
240
         "R_68K_TLS_LDO8",      /* name */
241
         FALSE,                 /* partial_inplace */
242
         0,                      /* src_mask */
243
         0x000000ff,            /* dst_mask */
244
         FALSE),                /* pcrel_offset */
245
 
246
  /* TLS initial execution variable reference.  */
247
  HOWTO (R_68K_TLS_IE32,        /* type */
248
         0,                      /* rightshift */
249
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
250
         32,                    /* bitsize */
251
         FALSE,                 /* pc_relative */
252
         0,                      /* bitpos */
253
         complain_overflow_bitfield, /* complain_on_overflow */
254
         bfd_elf_generic_reloc, /* special_function */
255
         "R_68K_TLS_IE32",      /* name */
256
         FALSE,                 /* partial_inplace */
257
         0,                      /* src_mask */
258
         0xffffffff,            /* dst_mask */
259
         FALSE),                /* pcrel_offset */
260
 
261
  HOWTO (R_68K_TLS_IE16,        /* type */
262
         0,                      /* rightshift */
263
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
264
         16,                    /* bitsize */
265
         FALSE,                 /* pc_relative */
266
         0,                      /* bitpos */
267
         complain_overflow_signed, /* complain_on_overflow */
268
         bfd_elf_generic_reloc, /* special_function */
269
         "R_68K_TLS_IE16",      /* name */
270
         FALSE,                 /* partial_inplace */
271
         0,                      /* src_mask */
272
         0x0000ffff,            /* dst_mask */
273
         FALSE),                /* pcrel_offset */
274
 
275
  HOWTO (R_68K_TLS_IE8,         /* type */
276
         0,                      /* rightshift */
277
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
278
         8,                     /* bitsize */
279
         FALSE,                 /* pc_relative */
280
         0,                      /* bitpos */
281
         complain_overflow_signed, /* complain_on_overflow */
282
         bfd_elf_generic_reloc, /* special_function */
283
         "R_68K_TLS_IE8",       /* name */
284
         FALSE,                 /* partial_inplace */
285
         0,                      /* src_mask */
286
         0x000000ff,            /* dst_mask */
287
         FALSE),                /* pcrel_offset */
288
 
289
  /* TLS local execution variable reference.  */
290
  HOWTO (R_68K_TLS_LE32,        /* type */
291
         0,                      /* rightshift */
292
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
293
         32,                    /* bitsize */
294
         FALSE,                 /* pc_relative */
295
         0,                      /* bitpos */
296
         complain_overflow_bitfield, /* complain_on_overflow */
297
         bfd_elf_generic_reloc, /* special_function */
298
         "R_68K_TLS_LE32",      /* name */
299
         FALSE,                 /* partial_inplace */
300
         0,                      /* src_mask */
301
         0xffffffff,            /* dst_mask */
302
         FALSE),                /* pcrel_offset */
303
 
304
  HOWTO (R_68K_TLS_LE16,        /* type */
305
         0,                      /* rightshift */
306
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
307
         16,                    /* bitsize */
308
         FALSE,                 /* pc_relative */
309
         0,                      /* bitpos */
310
         complain_overflow_signed, /* complain_on_overflow */
311
         bfd_elf_generic_reloc, /* special_function */
312
         "R_68K_TLS_LE16",      /* name */
313
         FALSE,                 /* partial_inplace */
314
         0,                      /* src_mask */
315
         0x0000ffff,            /* dst_mask */
316
         FALSE),                /* pcrel_offset */
317
 
318
  HOWTO (R_68K_TLS_LE8,         /* type */
319
         0,                      /* rightshift */
320
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
321
         8,                     /* bitsize */
322
         FALSE,                 /* pc_relative */
323
         0,                      /* bitpos */
324
         complain_overflow_signed, /* complain_on_overflow */
325
         bfd_elf_generic_reloc, /* special_function */
326
         "R_68K_TLS_LE8",       /* name */
327
         FALSE,                 /* partial_inplace */
328
         0,                      /* src_mask */
329
         0x000000ff,            /* dst_mask */
330
         FALSE),                /* pcrel_offset */
331
 
332
  /* TLS GD/LD dynamic relocations.  */
333
  HOWTO (R_68K_TLS_DTPMOD32,    /* type */
334
         0,                      /* rightshift */
335
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
336
         32,                    /* bitsize */
337
         FALSE,                 /* pc_relative */
338
         0,                      /* bitpos */
339
         complain_overflow_dont, /* complain_on_overflow */
340
         bfd_elf_generic_reloc, /* special_function */
341
         "R_68K_TLS_DTPMOD32",  /* name */
342
         FALSE,                 /* partial_inplace */
343
         0,                      /* src_mask */
344
         0xffffffff,            /* dst_mask */
345
         FALSE),                /* pcrel_offset */
346
 
347
  HOWTO (R_68K_TLS_DTPREL32,    /* type */
348
         0,                      /* rightshift */
349
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
350
         32,                    /* bitsize */
351
         FALSE,                 /* pc_relative */
352
         0,                      /* bitpos */
353
         complain_overflow_dont, /* complain_on_overflow */
354
         bfd_elf_generic_reloc, /* special_function */
355
         "R_68K_TLS_DTPREL32",  /* name */
356
         FALSE,                 /* partial_inplace */
357
         0,                      /* src_mask */
358
         0xffffffff,            /* dst_mask */
359
         FALSE),                /* pcrel_offset */
360
 
361
  HOWTO (R_68K_TLS_TPREL32,     /* type */
362
         0,                      /* rightshift */
363
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
364
         32,                    /* bitsize */
365
         FALSE,                 /* pc_relative */
366
         0,                      /* bitpos */
367
         complain_overflow_dont, /* complain_on_overflow */
368
         bfd_elf_generic_reloc, /* special_function */
369
         "R_68K_TLS_TPREL32",   /* name */
370
         FALSE,                 /* partial_inplace */
371
         0,                      /* src_mask */
372
         0xffffffff,            /* dst_mask */
373
         FALSE),                /* pcrel_offset */
374
};
375
 
376
static void
377
rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
378
{
379
  unsigned int indx = ELF32_R_TYPE (dst->r_info);
380
 
381
  if (indx >= (unsigned int) R_68K_max)
382
    {
383
      (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
384
                             abfd, (int) indx);
385
      indx = R_68K_NONE;
386
    }
387
  cache_ptr->howto = &howto_table[indx];
388
}
389
 
390
#define elf_info_to_howto rtype_to_howto
391
 
392
static const struct
393
{
394
  bfd_reloc_code_real_type bfd_val;
395
  int elf_val;
396
}
397
  reloc_map[] =
398
{
399
  { BFD_RELOC_NONE, R_68K_NONE },
400
  { BFD_RELOC_32, R_68K_32 },
401
  { BFD_RELOC_16, R_68K_16 },
402
  { BFD_RELOC_8, R_68K_8 },
403
  { BFD_RELOC_32_PCREL, R_68K_PC32 },
404
  { BFD_RELOC_16_PCREL, R_68K_PC16 },
405
  { BFD_RELOC_8_PCREL, R_68K_PC8 },
406
  { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 },
407
  { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 },
408
  { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 },
409
  { BFD_RELOC_32_GOTOFF, R_68K_GOT32O },
410
  { BFD_RELOC_16_GOTOFF, R_68K_GOT16O },
411
  { BFD_RELOC_8_GOTOFF, R_68K_GOT8O },
412
  { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 },
413
  { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 },
414
  { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 },
415
  { BFD_RELOC_32_PLTOFF, R_68K_PLT32O },
416
  { BFD_RELOC_16_PLTOFF, R_68K_PLT16O },
417
  { BFD_RELOC_8_PLTOFF, R_68K_PLT8O },
418
  { BFD_RELOC_NONE, R_68K_COPY },
419
  { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT },
420
  { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT },
421
  { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE },
422
  { BFD_RELOC_CTOR, R_68K_32 },
423
  { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT },
424
  { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY },
425
  { BFD_RELOC_68K_TLS_GD32, R_68K_TLS_GD32 },
426
  { BFD_RELOC_68K_TLS_GD16, R_68K_TLS_GD16 },
427
  { BFD_RELOC_68K_TLS_GD8, R_68K_TLS_GD8 },
428
  { BFD_RELOC_68K_TLS_LDM32, R_68K_TLS_LDM32 },
429
  { BFD_RELOC_68K_TLS_LDM16, R_68K_TLS_LDM16 },
430
  { BFD_RELOC_68K_TLS_LDM8, R_68K_TLS_LDM8 },
431
  { BFD_RELOC_68K_TLS_LDO32, R_68K_TLS_LDO32 },
432
  { BFD_RELOC_68K_TLS_LDO16, R_68K_TLS_LDO16 },
433
  { BFD_RELOC_68K_TLS_LDO8, R_68K_TLS_LDO8 },
434
  { BFD_RELOC_68K_TLS_IE32, R_68K_TLS_IE32 },
435
  { BFD_RELOC_68K_TLS_IE16, R_68K_TLS_IE16 },
436
  { BFD_RELOC_68K_TLS_IE8, R_68K_TLS_IE8 },
437
  { BFD_RELOC_68K_TLS_LE32, R_68K_TLS_LE32 },
438
  { BFD_RELOC_68K_TLS_LE16, R_68K_TLS_LE16 },
439
  { BFD_RELOC_68K_TLS_LE8, R_68K_TLS_LE8 },
440
};
441
 
442
static reloc_howto_type *
443
reloc_type_lookup (abfd, code)
444
     bfd *abfd ATTRIBUTE_UNUSED;
445
     bfd_reloc_code_real_type code;
446
{
447
  unsigned int i;
448
  for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
449
    {
450
      if (reloc_map[i].bfd_val == code)
451
        return &howto_table[reloc_map[i].elf_val];
452
    }
453
  return 0;
454
}
455
 
456
static reloc_howto_type *
457
reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
458
{
459
  unsigned int i;
460
 
461
  for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
462
    if (howto_table[i].name != NULL
463
        && strcasecmp (howto_table[i].name, r_name) == 0)
464
      return &howto_table[i];
465
 
466
  return NULL;
467
}
468
 
469
#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
470
#define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
471
#define ELF_ARCH bfd_arch_m68k
472
#define ELF_TARGET_ID M68K_ELF_DATA
473
 
474
/* Functions for the m68k ELF linker.  */
475
 
476
/* The name of the dynamic interpreter.  This is put in the .interp
477
   section.  */
478
 
479
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
480
 
481
/* Describes one of the various PLT styles.  */
482
 
483
struct elf_m68k_plt_info
484
{
485
  /* The size of each PLT entry.  */
486
  bfd_vma size;
487
 
488
  /* The template for the first PLT entry.  */
489
  const bfd_byte *plt0_entry;
490
 
491
  /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations.
492
     The comments by each member indicate the value that the relocation
493
     is against.  */
494
  struct {
495
    unsigned int got4; /* .got + 4 */
496
    unsigned int got8; /* .got + 8 */
497
  } plt0_relocs;
498
 
499
  /* The template for a symbol's PLT entry.  */
500
  const bfd_byte *symbol_entry;
501
 
502
  /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations.
503
     The comments by each member indicate the value that the relocation
504
     is against.  */
505
  struct {
506
    unsigned int got; /* the symbol's .got.plt entry */
507
    unsigned int plt; /* .plt */
508
  } symbol_relocs;
509
 
510
  /* The offset of the resolver stub from the start of SYMBOL_ENTRY.
511
     The stub starts with "move.l #relocoffset,%d0".  */
512
  bfd_vma symbol_resolve_entry;
513
};
514
 
515
/* The size in bytes of an entry in the procedure linkage table.  */
516
 
517
#define PLT_ENTRY_SIZE 20
518
 
519
/* The first entry in a procedure linkage table looks like this.  See
520
   the SVR4 ABI m68k supplement to see how this works.  */
521
 
522
static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] =
523
{
524
  0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
525
  0, 0, 0, 2,                /* + (.got + 4) - . */
526
  0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */
527
  0, 0, 0, 2,                /* + (.got + 8) - . */
528
  0, 0, 0, 0                  /* pad out to 20 bytes.  */
529
};
530
 
531
/* Subsequent entries in a procedure linkage table look like this.  */
532
 
533
static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
534
{
535
  0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */
536
  0, 0, 0, 2,                /* + (.got.plt entry) - . */
537
  0x2f, 0x3c,             /* move.l #offset,-(%sp) */
538
  0, 0, 0, 0,                 /* + reloc index */
539
  0x60, 0xff,             /* bra.l .plt */
540
  0, 0, 0, 0                  /* + .plt - . */
541
};
542
 
543
static const struct elf_m68k_plt_info elf_m68k_plt_info = {
544
  PLT_ENTRY_SIZE,
545
  elf_m68k_plt0_entry, { 4, 12 },
546
  elf_m68k_plt_entry, { 4, 16 }, 8
547
};
548
 
549
#define ISAB_PLT_ENTRY_SIZE 24
550
 
551
static const bfd_byte elf_isab_plt0_entry[ISAB_PLT_ENTRY_SIZE] =
552
{
553
  0x20, 0x3c,             /* move.l #offset,%d0 */
554
  0, 0, 0, 0,             /* + (.got + 4) - . */
555
  0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */
556
  0x20, 0x3c,             /* move.l #offset,%d0 */
557
  0, 0, 0, 0,             /* + (.got + 8) - . */
558
  0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
559
  0x4e, 0xd0,             /* jmp (%a0) */
560
  0x4e, 0x71              /* nop */
561
};
562
 
563
/* Subsequent entries in a procedure linkage table look like this.  */
564
 
565
static const bfd_byte elf_isab_plt_entry[ISAB_PLT_ENTRY_SIZE] =
566
{
567
  0x20, 0x3c,             /* move.l #offset,%d0 */
568
  0, 0, 0, 0,             /* + (.got.plt entry) - . */
569
  0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
570
  0x4e, 0xd0,             /* jmp (%a0) */
571
  0x2f, 0x3c,             /* move.l #offset,-(%sp) */
572
  0, 0, 0, 0,             /* + reloc index */
573
  0x60, 0xff,             /* bra.l .plt */
574
  0, 0, 0, 0              /* + .plt - . */
575
};
576
 
577
static const struct elf_m68k_plt_info elf_isab_plt_info = {
578
  ISAB_PLT_ENTRY_SIZE,
579
  elf_isab_plt0_entry, { 2, 12 },
580
  elf_isab_plt_entry, { 2, 20 }, 12
581
};
582
 
583
#define ISAC_PLT_ENTRY_SIZE 24
584
 
585
static const bfd_byte elf_isac_plt0_entry[ISAC_PLT_ENTRY_SIZE] =
586
{
587
  0x20, 0x3c,             /* move.l #offset,%d0 */
588
  0, 0, 0, 0,                 /* replaced with .got + 4 - . */
589
  0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */
590
  0x20, 0x3c,             /* move.l #offset,%d0 */
591
  0, 0, 0, 0,                 /* replaced with .got + 8 - . */
592
  0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
593
  0x4e, 0xd0,             /* jmp (%a0) */
594
  0x4e, 0x71              /* nop */
595
};
596
 
597
/* Subsequent entries in a procedure linkage table look like this.  */
598
 
599
static const bfd_byte elf_isac_plt_entry[ISAC_PLT_ENTRY_SIZE] =
600
{
601
  0x20, 0x3c,             /* move.l #offset,%d0 */
602
  0, 0, 0, 0,                 /* replaced with (.got entry) - . */
603
  0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
604
  0x4e, 0xd0,             /* jmp (%a0) */
605
  0x2f, 0x3c,             /* move.l #offset,-(%sp) */
606
  0, 0, 0, 0,                 /* replaced with offset into relocation table */
607
  0x61, 0xff,             /* bsr.l .plt */
608
  0, 0, 0, 0                  /* replaced with .plt - . */
609
};
610
 
611
static const struct elf_m68k_plt_info elf_isac_plt_info = {
612
  ISAC_PLT_ENTRY_SIZE,
613
  elf_isac_plt0_entry, { 2, 12},
614
  elf_isac_plt_entry, { 2, 20 }, 12
615
};
616
 
617
#define CPU32_PLT_ENTRY_SIZE 24
618
/* Procedure linkage table entries for the cpu32 */
619
static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] =
620
{
621
  0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
622
  0, 0, 0, 2,             /* + (.got + 4) - . */
623
  0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
624
  0, 0, 0, 2,             /* + (.got + 8) - . */
625
  0x4e, 0xd1,             /* jmp %a1@ */
626
  0, 0, 0, 0,             /* pad out to 24 bytes.  */
627
  0, 0
628
};
629
 
630
static const bfd_byte elf_cpu32_plt_entry[CPU32_PLT_ENTRY_SIZE] =
631
{
632
  0x22, 0x7b, 0x01, 0x70,  /* moveal %pc@(0xc), %a1 */
633
  0, 0, 0, 2,              /* + (.got.plt entry) - . */
634
  0x4e, 0xd1,              /* jmp %a1@ */
635
  0x2f, 0x3c,              /* move.l #offset,-(%sp) */
636
  0, 0, 0, 0,              /* + reloc index */
637
  0x60, 0xff,              /* bra.l .plt */
638
  0, 0, 0, 0,              /* + .plt - . */
639
  0, 0
640
};
641
 
642
static const struct elf_m68k_plt_info elf_cpu32_plt_info = {
643
  CPU32_PLT_ENTRY_SIZE,
644
  elf_cpu32_plt0_entry, { 4, 12 },
645
  elf_cpu32_plt_entry, { 4, 18 }, 10
646
};
647
 
648
/* The m68k linker needs to keep track of the number of relocs that it
649
   decides to copy in check_relocs for each symbol.  This is so that it
650
   can discard PC relative relocs if it doesn't need them when linking
651
   with -Bsymbolic.  We store the information in a field extending the
652
   regular ELF linker hash table.  */
653
 
654
/* This structure keeps track of the number of PC relative relocs we have
655
   copied for a given symbol.  */
656
 
657
struct elf_m68k_pcrel_relocs_copied
658
{
659
  /* Next section.  */
660
  struct elf_m68k_pcrel_relocs_copied *next;
661
  /* A section in dynobj.  */
662
  asection *section;
663
  /* Number of relocs copied in this section.  */
664
  bfd_size_type count;
665
};
666
 
667
/* Forward declaration.  */
668
struct elf_m68k_got_entry;
669
 
670
/* m68k ELF linker hash entry.  */
671
 
672
struct elf_m68k_link_hash_entry
673
{
674
  struct elf_link_hash_entry root;
675
 
676
  /* Number of PC relative relocs copied for this symbol.  */
677
  struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied;
678
 
679
  /* Key to got_entries.  */
680
  unsigned long got_entry_key;
681
 
682
  /* List of GOT entries for this symbol.  This list is build during
683
     offset finalization and is used within elf_m68k_finish_dynamic_symbol
684
     to traverse all GOT entries for a particular symbol.
685
 
686
     ??? We could've used root.got.glist field instead, but having
687
     a separate field is cleaner.  */
688
  struct elf_m68k_got_entry *glist;
689
};
690
 
691
#define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent))
692
 
693
/* Key part of GOT entry in hashtable.  */
694
struct elf_m68k_got_entry_key
695
{
696
  /* BFD in which this symbol was defined.  NULL for global symbols.  */
697
  const bfd *bfd;
698
 
699
  /* Symbol index.  Either local symbol index or h->got_entry_key.  */
700
  unsigned long symndx;
701
 
702
  /* Type is one of R_68K_GOT{8, 16, 32}O, R_68K_TLS_GD{8, 16, 32},
703
     R_68K_TLS_LDM{8, 16, 32} or R_68K_TLS_IE{8, 16, 32}.
704
 
705
     From perspective of hashtable key, only elf_m68k_got_reloc_type (type)
706
     matters.  That is, we distinguish between, say, R_68K_GOT16O
707
     and R_68K_GOT32O when allocating offsets, but they are considered to be
708
     the same when searching got->entries.  */
709
  enum elf_m68k_reloc_type type;
710
};
711
 
712
/* Size of the GOT offset suitable for relocation.  */
713
enum elf_m68k_got_offset_size { R_8, R_16, R_32, R_LAST };
714
 
715
/* Entry of the GOT.  */
716
struct elf_m68k_got_entry
717
{
718
  /* GOT entries are put into a got->entries hashtable.  This is the key.  */
719
  struct elf_m68k_got_entry_key key_;
720
 
721
  /* GOT entry data.  We need s1 before offset finalization and s2 after.  */
722
  union
723
  {
724
    struct
725
    {
726
      /* Number of times this entry is referenced.  It is used to
727
         filter out unnecessary GOT slots in elf_m68k_gc_sweep_hook.  */
728
      bfd_vma refcount;
729
    } s1;
730
 
731
    struct
732
    {
733
      /* Offset from the start of .got section.  To calculate offset relative
734
         to GOT pointer one should substract got->offset from this value.  */
735
      bfd_vma offset;
736
 
737
      /* Pointer to the next GOT entry for this global symbol.
738
         Symbols have at most one entry in one GOT, but might
739
         have entries in more than one GOT.
740
         Root of this list is h->glist.
741
         NULL for local symbols.  */
742
      struct elf_m68k_got_entry *next;
743
    } s2;
744
  } u;
745
};
746
 
747
/* Return representative type for relocation R_TYPE.
748
   This is used to avoid enumerating many relocations in comparisons,
749
   switches etc.  */
750
 
751
static enum elf_m68k_reloc_type
752
elf_m68k_reloc_got_type (enum elf_m68k_reloc_type r_type)
753
{
754
  switch (r_type)
755
    {
756
      /* In most cases R_68K_GOTx relocations require the very same
757
         handling as R_68K_GOT32O relocation.  In cases when we need
758
         to distinguish between the two, we use explicitly compare against
759
         r_type.  */
760
    case R_68K_GOT32:
761
    case R_68K_GOT16:
762
    case R_68K_GOT8:
763
    case R_68K_GOT32O:
764
    case R_68K_GOT16O:
765
    case R_68K_GOT8O:
766
      return R_68K_GOT32O;
767
 
768
    case R_68K_TLS_GD32:
769
    case R_68K_TLS_GD16:
770
    case R_68K_TLS_GD8:
771
      return R_68K_TLS_GD32;
772
 
773
    case R_68K_TLS_LDM32:
774
    case R_68K_TLS_LDM16:
775
    case R_68K_TLS_LDM8:
776
      return R_68K_TLS_LDM32;
777
 
778
    case R_68K_TLS_IE32:
779
    case R_68K_TLS_IE16:
780
    case R_68K_TLS_IE8:
781
      return R_68K_TLS_IE32;
782
 
783
    default:
784
      BFD_ASSERT (FALSE);
785
      return 0;
786
    }
787
}
788
 
789
/* Return size of the GOT entry offset for relocation R_TYPE.  */
790
 
791
static enum elf_m68k_got_offset_size
792
elf_m68k_reloc_got_offset_size (enum elf_m68k_reloc_type r_type)
793
{
794
  switch (r_type)
795
    {
796
    case R_68K_GOT32: case R_68K_GOT16: case R_68K_GOT8:
797
    case R_68K_GOT32O: case R_68K_TLS_GD32: case R_68K_TLS_LDM32:
798
    case R_68K_TLS_IE32:
799
      return R_32;
800
 
801
    case R_68K_GOT16O: case R_68K_TLS_GD16: case R_68K_TLS_LDM16:
802
    case R_68K_TLS_IE16:
803
      return R_16;
804
 
805
    case R_68K_GOT8O: case R_68K_TLS_GD8: case R_68K_TLS_LDM8:
806
    case R_68K_TLS_IE8:
807
      return R_8;
808
 
809
    default:
810
      BFD_ASSERT (FALSE);
811
      return 0;
812
    }
813
}
814
 
815
/* Return number of GOT entries we need to allocate in GOT for
816
   relocation R_TYPE.  */
817
 
818
static bfd_vma
819
elf_m68k_reloc_got_n_slots (enum elf_m68k_reloc_type r_type)
820
{
821
  switch (elf_m68k_reloc_got_type (r_type))
822
    {
823
    case R_68K_GOT32O:
824
    case R_68K_TLS_IE32:
825
      return 1;
826
 
827
    case R_68K_TLS_GD32:
828
    case R_68K_TLS_LDM32:
829
      return 2;
830
 
831
    default:
832
      BFD_ASSERT (FALSE);
833
      return 0;
834
    }
835
}
836
 
837
/* Return TRUE if relocation R_TYPE is a TLS one.  */
838
 
839
static bfd_boolean
840
elf_m68k_reloc_tls_p (enum elf_m68k_reloc_type r_type)
841
{
842
  switch (r_type)
843
    {
844
    case R_68K_TLS_GD32: case R_68K_TLS_GD16: case R_68K_TLS_GD8:
845
    case R_68K_TLS_LDM32: case R_68K_TLS_LDM16: case R_68K_TLS_LDM8:
846
    case R_68K_TLS_LDO32: case R_68K_TLS_LDO16: case R_68K_TLS_LDO8:
847
    case R_68K_TLS_IE32: case R_68K_TLS_IE16: case R_68K_TLS_IE8:
848
    case R_68K_TLS_LE32: case R_68K_TLS_LE16: case R_68K_TLS_LE8:
849
    case R_68K_TLS_DTPMOD32: case R_68K_TLS_DTPREL32: case R_68K_TLS_TPREL32:
850
      return TRUE;
851
 
852
    default:
853
      return FALSE;
854
    }
855
}
856
 
857
/* Data structure representing a single GOT.  */
858
struct elf_m68k_got
859
{
860
  /* Hashtable of 'struct elf_m68k_got_entry's.
861
     Starting size of this table is the maximum number of
862
     R_68K_GOT8O entries.  */
863
  htab_t entries;
864
 
865
  /* Number of R_x slots in this GOT.  Some (e.g., TLS) entries require
866
     several GOT slots.
867
 
868
     n_slots[R_8] is the count of R_8 slots in this GOT.
869
     n_slots[R_16] is the cumulative count of R_8 and R_16 slots
870
     in this GOT.
871
     n_slots[R_32] is the cumulative count of R_8, R_16 and R_32 slots
872
     in this GOT.  This is the total number of slots.  */
873
  bfd_vma n_slots[R_LAST];
874
 
875
  /* Number of local (entry->key_.h == NULL) slots in this GOT.
876
     This is only used to properly calculate size of .rela.got section;
877
     see elf_m68k_partition_multi_got.  */
878
  bfd_vma local_n_slots;
879
 
880
  /* Offset of this GOT relative to beginning of .got section.  */
881
  bfd_vma offset;
882
};
883
 
884
/* BFD and its GOT.  This is an entry in multi_got->bfd2got hashtable.  */
885
struct elf_m68k_bfd2got_entry
886
{
887
  /* BFD.  */
888
  const bfd *bfd;
889
 
890
  /* Assigned GOT.  Before partitioning multi-GOT each BFD has its own
891
     GOT structure.  After partitioning several BFD's might [and often do]
892
     share a single GOT.  */
893
  struct elf_m68k_got *got;
894
};
895
 
896
/* The main data structure holding all the pieces.  */
897
struct elf_m68k_multi_got
898
{
899
  /* Hashtable mapping each BFD to its GOT.  If a BFD doesn't have an entry
900
     here, then it doesn't need a GOT (this includes the case of a BFD
901
     having an empty GOT).
902
 
903
     ??? This hashtable can be replaced by an array indexed by bfd->id.  */
904
  htab_t bfd2got;
905
 
906
  /* Next symndx to assign a global symbol.
907
     h->got_entry_key is initialized from this counter.  */
908
  unsigned long global_symndx;
909
};
910
 
911
/* m68k ELF linker hash table.  */
912
 
913
struct elf_m68k_link_hash_table
914
{
915
  struct elf_link_hash_table root;
916
 
917
  /* Small local sym cache.  */
918
  struct sym_cache sym_cache;
919
 
920
  /* The PLT format used by this link, or NULL if the format has not
921
     yet been chosen.  */
922
  const struct elf_m68k_plt_info *plt_info;
923
 
924
  /* True, if GP is loaded within each function which uses it.
925
     Set to TRUE when GOT negative offsets or multi-GOT is enabled.  */
926
  bfd_boolean local_gp_p;
927
 
928
  /* Switch controlling use of negative offsets to double the size of GOTs.  */
929
  bfd_boolean use_neg_got_offsets_p;
930
 
931
  /* Switch controlling generation of multiple GOTs.  */
932
  bfd_boolean allow_multigot_p;
933
 
934
  /* Multi-GOT data structure.  */
935
  struct elf_m68k_multi_got multi_got_;
936
};
937
 
938
/* Get the m68k ELF linker hash table from a link_info structure.  */
939
 
940
#define elf_m68k_hash_table(p) \
941
  (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
942
  == M68K_ELF_DATA ? ((struct elf_m68k_link_hash_table *) ((p)->hash)) : NULL)
943
 
944
/* Shortcut to multi-GOT data.  */
945
#define elf_m68k_multi_got(INFO) (&elf_m68k_hash_table (INFO)->multi_got_)
946
 
947
/* Create an entry in an m68k ELF linker hash table.  */
948
 
949
static struct bfd_hash_entry *
950
elf_m68k_link_hash_newfunc (struct bfd_hash_entry *entry,
951
                            struct bfd_hash_table *table,
952
                            const char *string)
953
{
954
  struct bfd_hash_entry *ret = entry;
955
 
956
  /* Allocate the structure if it has not already been allocated by a
957
     subclass.  */
958
  if (ret == NULL)
959
    ret = bfd_hash_allocate (table,
960
                             sizeof (struct elf_m68k_link_hash_entry));
961
  if (ret == NULL)
962
    return ret;
963
 
964
  /* Call the allocation method of the superclass.  */
965
  ret = _bfd_elf_link_hash_newfunc (ret, table, string);
966
  if (ret != NULL)
967
    {
968
      elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL;
969
      elf_m68k_hash_entry (ret)->got_entry_key = 0;
970
      elf_m68k_hash_entry (ret)->glist = NULL;
971
    }
972
 
973
  return ret;
974
}
975
 
976
/* Create an m68k ELF linker hash table.  */
977
 
978
static struct bfd_link_hash_table *
979
elf_m68k_link_hash_table_create (bfd *abfd)
980
{
981
  struct elf_m68k_link_hash_table *ret;
982
  bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table);
983
 
984
  ret = (struct elf_m68k_link_hash_table *) bfd_malloc (amt);
985
  if (ret == (struct elf_m68k_link_hash_table *) NULL)
986
    return NULL;
987
 
988
  if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
989
                                      elf_m68k_link_hash_newfunc,
990
                                      sizeof (struct elf_m68k_link_hash_entry),
991
                                      M68K_ELF_DATA))
992
    {
993
      free (ret);
994
      return NULL;
995
    }
996
 
997
  ret->sym_cache.abfd = NULL;
998
  ret->plt_info = NULL;
999
  ret->local_gp_p = FALSE;
1000
  ret->use_neg_got_offsets_p = FALSE;
1001
  ret->allow_multigot_p = FALSE;
1002
  ret->multi_got_.bfd2got = NULL;
1003
  ret->multi_got_.global_symndx = 1;
1004
 
1005
  return &ret->root.root;
1006
}
1007
 
1008
/* Destruct local data.  */
1009
 
1010
static void
1011
elf_m68k_link_hash_table_free (struct bfd_link_hash_table *_htab)
1012
{
1013
  struct elf_m68k_link_hash_table *htab;
1014
 
1015
  htab = (struct elf_m68k_link_hash_table *) _htab;
1016
 
1017
  if (htab->multi_got_.bfd2got != NULL)
1018
    {
1019
      htab_delete (htab->multi_got_.bfd2got);
1020
      htab->multi_got_.bfd2got = NULL;
1021
    }
1022
}
1023
 
1024
/* Set the right machine number.  */
1025
 
1026
static bfd_boolean
1027
elf32_m68k_object_p (bfd *abfd)
1028
{
1029
  unsigned int mach = 0;
1030
  unsigned features = 0;
1031
  flagword eflags = elf_elfheader (abfd)->e_flags;
1032
 
1033
  if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1034
    features |= m68000;
1035
  else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1036
    features |= cpu32;
1037
  else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1038
    features |= fido_a;
1039
  else
1040
    {
1041
      switch (eflags & EF_M68K_CF_ISA_MASK)
1042
        {
1043
        case EF_M68K_CF_ISA_A_NODIV:
1044
          features |= mcfisa_a;
1045
          break;
1046
        case EF_M68K_CF_ISA_A:
1047
          features |= mcfisa_a|mcfhwdiv;
1048
          break;
1049
        case EF_M68K_CF_ISA_A_PLUS:
1050
          features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp;
1051
          break;
1052
        case EF_M68K_CF_ISA_B_NOUSP:
1053
          features |= mcfisa_a|mcfisa_b|mcfhwdiv;
1054
          break;
1055
        case EF_M68K_CF_ISA_B:
1056
          features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp;
1057
          break;
1058
        case EF_M68K_CF_ISA_C:
1059
          features |= mcfisa_a|mcfisa_c|mcfhwdiv|mcfusp;
1060
          break;
1061
        case EF_M68K_CF_ISA_C_NODIV:
1062
          features |= mcfisa_a|mcfisa_c|mcfusp;
1063
          break;
1064
        }
1065
      switch (eflags & EF_M68K_CF_MAC_MASK)
1066
        {
1067
        case EF_M68K_CF_MAC:
1068
          features |= mcfmac;
1069
          break;
1070
        case EF_M68K_CF_EMAC:
1071
          features |= mcfemac;
1072
          break;
1073
        }
1074
      if (eflags & EF_M68K_CF_FLOAT)
1075
        features |= cfloat;
1076
    }
1077
 
1078
  mach = bfd_m68k_features_to_mach (features);
1079
  bfd_default_set_arch_mach (abfd, bfd_arch_m68k, mach);
1080
 
1081
  return TRUE;
1082
}
1083
 
1084
/* Somewhat reverse of elf32_m68k_object_p, this sets the e_flag
1085
   field based on the machine number.  */
1086
 
1087
static void
1088
elf_m68k_final_write_processing (bfd *abfd,
1089
                                 bfd_boolean linker ATTRIBUTE_UNUSED)
1090
{
1091
  int mach = bfd_get_mach (abfd);
1092
  unsigned long e_flags = elf_elfheader (abfd)->e_flags;
1093
 
1094
  if (!e_flags)
1095
    {
1096
      unsigned int arch_mask;
1097
 
1098
      arch_mask = bfd_m68k_mach_to_features (mach);
1099
 
1100
      if (arch_mask & m68000)
1101
        e_flags = EF_M68K_M68000;
1102
      else if (arch_mask & cpu32)
1103
        e_flags = EF_M68K_CPU32;
1104
      else if (arch_mask & fido_a)
1105
        e_flags = EF_M68K_FIDO;
1106
      else
1107
        {
1108
          switch (arch_mask
1109
                  & (mcfisa_a | mcfisa_aa | mcfisa_b | mcfisa_c | mcfhwdiv | mcfusp))
1110
            {
1111
            case mcfisa_a:
1112
              e_flags |= EF_M68K_CF_ISA_A_NODIV;
1113
              break;
1114
            case mcfisa_a | mcfhwdiv:
1115
              e_flags |= EF_M68K_CF_ISA_A;
1116
              break;
1117
            case mcfisa_a | mcfisa_aa | mcfhwdiv | mcfusp:
1118
              e_flags |= EF_M68K_CF_ISA_A_PLUS;
1119
              break;
1120
            case mcfisa_a | mcfisa_b | mcfhwdiv:
1121
              e_flags |= EF_M68K_CF_ISA_B_NOUSP;
1122
              break;
1123
            case mcfisa_a | mcfisa_b | mcfhwdiv | mcfusp:
1124
              e_flags |= EF_M68K_CF_ISA_B;
1125
              break;
1126
            case mcfisa_a | mcfisa_c | mcfhwdiv | mcfusp:
1127
              e_flags |= EF_M68K_CF_ISA_C;
1128
              break;
1129
            case mcfisa_a | mcfisa_c | mcfusp:
1130
              e_flags |= EF_M68K_CF_ISA_C_NODIV;
1131
              break;
1132
            }
1133
          if (arch_mask & mcfmac)
1134
            e_flags |= EF_M68K_CF_MAC;
1135
          else if (arch_mask & mcfemac)
1136
            e_flags |= EF_M68K_CF_EMAC;
1137
          if (arch_mask & cfloat)
1138
            e_flags |= EF_M68K_CF_FLOAT | EF_M68K_CFV4E;
1139
        }
1140
      elf_elfheader (abfd)->e_flags = e_flags;
1141
    }
1142
}
1143
 
1144
/* Keep m68k-specific flags in the ELF header.  */
1145
 
1146
static bfd_boolean
1147
elf32_m68k_set_private_flags (abfd, flags)
1148
     bfd *abfd;
1149
     flagword flags;
1150
{
1151
  elf_elfheader (abfd)->e_flags = flags;
1152
  elf_flags_init (abfd) = TRUE;
1153
  return TRUE;
1154
}
1155
 
1156
/* Merge backend specific data from an object file to the output
1157
   object file when linking.  */
1158
static bfd_boolean
1159
elf32_m68k_merge_private_bfd_data (ibfd, obfd)
1160
     bfd *ibfd;
1161
     bfd *obfd;
1162
{
1163
  flagword out_flags;
1164
  flagword in_flags;
1165
  flagword out_isa;
1166
  flagword in_isa;
1167
  const bfd_arch_info_type *arch_info;
1168
 
1169
  if (   bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1170
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1171
    return FALSE;
1172
 
1173
  /* Get the merged machine.  This checks for incompatibility between
1174
     Coldfire & non-Coldfire flags, incompability between different
1175
     Coldfire ISAs, and incompability between different MAC types.  */
1176
  arch_info = bfd_arch_get_compatible (ibfd, obfd, FALSE);
1177
  if (!arch_info)
1178
    return FALSE;
1179
 
1180
  bfd_set_arch_mach (obfd, bfd_arch_m68k, arch_info->mach);
1181
 
1182
  in_flags = elf_elfheader (ibfd)->e_flags;
1183
  if (!elf_flags_init (obfd))
1184
    {
1185
      elf_flags_init (obfd) = TRUE;
1186
      out_flags = in_flags;
1187
    }
1188
  else
1189
    {
1190
      out_flags = elf_elfheader (obfd)->e_flags;
1191
      unsigned int variant_mask;
1192
 
1193
      if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1194
        variant_mask = 0;
1195
      else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1196
        variant_mask = 0;
1197
      else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1198
        variant_mask = 0;
1199
      else
1200
        variant_mask = EF_M68K_CF_ISA_MASK;
1201
 
1202
      in_isa = (in_flags & variant_mask);
1203
      out_isa = (out_flags & variant_mask);
1204
      if (in_isa > out_isa)
1205
        out_flags ^= in_isa ^ out_isa;
1206
      if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32
1207
           && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1208
          || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO
1209
              && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32))
1210
        out_flags = EF_M68K_FIDO;
1211
      else
1212
      out_flags |= in_flags ^ in_isa;
1213
    }
1214
  elf_elfheader (obfd)->e_flags = out_flags;
1215
 
1216
  return TRUE;
1217
}
1218
 
1219
/* Display the flags field.  */
1220
 
1221
static bfd_boolean
1222
elf32_m68k_print_private_bfd_data (bfd *abfd, void * ptr)
1223
{
1224
  FILE *file = (FILE *) ptr;
1225
  flagword eflags = elf_elfheader (abfd)->e_flags;
1226
 
1227
  BFD_ASSERT (abfd != NULL && ptr != NULL);
1228
 
1229
  /* Print normal ELF private data.  */
1230
  _bfd_elf_print_private_bfd_data (abfd, ptr);
1231
 
1232
  /* Ignore init flag - it may not be set, despite the flags field containing valid data.  */
1233
 
1234
  /* xgettext:c-format */
1235
  fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
1236
 
1237
  if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1238
    fprintf (file, " [m68000]");
1239
  else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1240
    fprintf (file, " [cpu32]");
1241
  else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1242
    fprintf (file, " [fido]");
1243
  else
1244
    {
1245
      if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E)
1246
        fprintf (file, " [cfv4e]");
1247
 
1248
      if (eflags & EF_M68K_CF_ISA_MASK)
1249
        {
1250
          char const *isa = _("unknown");
1251
          char const *mac = _("unknown");
1252
          char const *additional = "";
1253
 
1254
          switch (eflags & EF_M68K_CF_ISA_MASK)
1255
            {
1256
            case EF_M68K_CF_ISA_A_NODIV:
1257
              isa = "A";
1258
              additional = " [nodiv]";
1259
              break;
1260
            case EF_M68K_CF_ISA_A:
1261
              isa = "A";
1262
              break;
1263
            case EF_M68K_CF_ISA_A_PLUS:
1264
              isa = "A+";
1265
              break;
1266
            case EF_M68K_CF_ISA_B_NOUSP:
1267
              isa = "B";
1268
              additional = " [nousp]";
1269
              break;
1270
            case EF_M68K_CF_ISA_B:
1271
              isa = "B";
1272
              break;
1273
            case EF_M68K_CF_ISA_C:
1274
              isa = "C";
1275
              break;
1276
            case EF_M68K_CF_ISA_C_NODIV:
1277
              isa = "C";
1278
              additional = " [nodiv]";
1279
              break;
1280
            }
1281
          fprintf (file, " [isa %s]%s", isa, additional);
1282
 
1283
          if (eflags & EF_M68K_CF_FLOAT)
1284
            fprintf (file, " [float]");
1285
 
1286
          switch (eflags & EF_M68K_CF_MAC_MASK)
1287
            {
1288
            case 0:
1289
              mac = NULL;
1290
              break;
1291
            case EF_M68K_CF_MAC:
1292
              mac = "mac";
1293
              break;
1294
            case EF_M68K_CF_EMAC:
1295
              mac = "emac";
1296
              break;
1297
            case EF_M68K_CF_EMAC_B:
1298
              mac = "emac_b";
1299
              break;
1300
            }
1301
          if (mac)
1302
            fprintf (file, " [%s]", mac);
1303
        }
1304
    }
1305
 
1306
  fputc ('\n', file);
1307
 
1308
  return TRUE;
1309
}
1310
 
1311
/* Multi-GOT support implementation design:
1312
 
1313
   Multi-GOT starts in check_relocs hook.  There we scan all
1314
   relocations of a BFD and build a local GOT (struct elf_m68k_got)
1315
   for it.  If a single BFD appears to require too many GOT slots with
1316
   R_68K_GOT8O or R_68K_GOT16O relocations, we fail with notification
1317
   to user.
1318
   After check_relocs has been invoked for each input BFD, we have
1319
   constructed a GOT for each input BFD.
1320
 
1321
   To minimize total number of GOTs required for a particular output BFD
1322
   (as some environments support only 1 GOT per output object) we try
1323
   to merge some of the GOTs to share an offset space.  Ideally [and in most
1324
   cases] we end up with a single GOT.  In cases when there are too many
1325
   restricted relocations (e.g., R_68K_GOT16O relocations) we end up with
1326
   several GOTs, assuming the environment can handle them.
1327
 
1328
   Partitioning is done in elf_m68k_partition_multi_got.  We start with
1329
   an empty GOT and traverse bfd2got hashtable putting got_entries from
1330
   local GOTs to the new 'big' one.  We do that by constructing an
1331
   intermediate GOT holding all the entries the local GOT has and the big
1332
   GOT lacks.  Then we check if there is room in the big GOT to accomodate
1333
   all the entries from diff.  On success we add those entries to the big
1334
   GOT; on failure we start the new 'big' GOT and retry the adding of
1335
   entries from the local GOT.  Note that this retry will always succeed as
1336
   each local GOT doesn't overflow the limits.  After partitioning we
1337
   end up with each bfd assigned one of the big GOTs.  GOT entries in the
1338
   big GOTs are initialized with GOT offsets.  Note that big GOTs are
1339
   positioned consequently in program space and represent a single huge GOT
1340
   to the outside world.
1341
 
1342
   After that we get to elf_m68k_relocate_section.  There we
1343
   adjust relocations of GOT pointer (_GLOBAL_OFFSET_TABLE_) and symbol
1344
   relocations to refer to appropriate [assigned to current input_bfd]
1345
   big GOT.
1346
 
1347
   Notes:
1348
 
1349
   GOT entry type: We have several types of GOT entries.
1350
   * R_8 type is used in entries for symbols that have at least one
1351
   R_68K_GOT8O or R_68K_TLS_*8 relocation.  We can have at most 0x40
1352
   such entries in one GOT.
1353
   * R_16 type is used in entries for symbols that have at least one
1354
   R_68K_GOT16O or R_68K_TLS_*16 relocation and no R_8 relocations.
1355
   We can have at most 0x4000 such entries in one GOT.
1356
   * R_32 type is used in all other cases.  We can have as many
1357
   such entries in one GOT as we'd like.
1358
   When counting relocations we have to include the count of the smaller
1359
   ranged relocations in the counts of the larger ranged ones in order
1360
   to correctly detect overflow.
1361
 
1362
   Sorting the GOT: In each GOT starting offsets are assigned to
1363
   R_8 entries, which are followed by R_16 entries, and
1364
   R_32 entries go at the end.  See finalize_got_offsets for details.
1365
 
1366
   Negative GOT offsets: To double usable offset range of GOTs we use
1367
   negative offsets.  As we assign entries with GOT offsets relative to
1368
   start of .got section, the offset values are positive.  They become
1369
   negative only in relocate_section where got->offset value is
1370
   subtracted from them.
1371
 
1372
   3 special GOT entries: There are 3 special GOT entries used internally
1373
   by loader.  These entries happen to be placed to .got.plt section,
1374
   so we don't do anything about them in multi-GOT support.
1375
 
1376
   Memory management: All data except for hashtables
1377
   multi_got->bfd2got and got->entries are allocated on
1378
   elf_hash_table (info)->dynobj bfd (for this reason we pass 'info'
1379
   to most functions), so we don't need to care to free them.  At the
1380
   moment of allocation hashtables are being linked into main data
1381
   structure (multi_got), all pieces of which are reachable from
1382
   elf_m68k_multi_got (info).  We deallocate them in
1383
   elf_m68k_link_hash_table_free.  */
1384
 
1385
/* Initialize GOT.  */
1386
 
1387
static void
1388
elf_m68k_init_got (struct elf_m68k_got *got)
1389
{
1390
  got->entries = NULL;
1391
  got->n_slots[R_8] = 0;
1392
  got->n_slots[R_16] = 0;
1393
  got->n_slots[R_32] = 0;
1394
  got->local_n_slots = 0;
1395
  got->offset = (bfd_vma) -1;
1396
}
1397
 
1398
/* Destruct GOT.  */
1399
 
1400
static void
1401
elf_m68k_clear_got (struct elf_m68k_got *got)
1402
{
1403
  if (got->entries != NULL)
1404
    {
1405
      htab_delete (got->entries);
1406
      got->entries = NULL;
1407
    }
1408
}
1409
 
1410
/* Create and empty GOT structure.  INFO is the context where memory
1411
   should be allocated.  */
1412
 
1413
static struct elf_m68k_got *
1414
elf_m68k_create_empty_got (struct bfd_link_info *info)
1415
{
1416
  struct elf_m68k_got *got;
1417
 
1418
  got = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*got));
1419
  if (got == NULL)
1420
    return NULL;
1421
 
1422
  elf_m68k_init_got (got);
1423
 
1424
  return got;
1425
}
1426
 
1427
/* Initialize KEY.  */
1428
 
1429
static void
1430
elf_m68k_init_got_entry_key (struct elf_m68k_got_entry_key *key,
1431
                             struct elf_link_hash_entry *h,
1432
                             const bfd *abfd, unsigned long symndx,
1433
                             enum elf_m68k_reloc_type reloc_type)
1434
{
1435
  if (elf_m68k_reloc_got_type (reloc_type) == R_68K_TLS_LDM32)
1436
    /* All TLS_LDM relocations share a single GOT entry.  */
1437
    {
1438
      key->bfd = NULL;
1439
      key->symndx = 0;
1440
    }
1441
  else if (h != NULL)
1442
    /* Global symbols are identified with their got_entry_key.  */
1443
    {
1444
      key->bfd = NULL;
1445
      key->symndx = elf_m68k_hash_entry (h)->got_entry_key;
1446
      BFD_ASSERT (key->symndx != 0);
1447
    }
1448
  else
1449
    /* Local symbols are identified by BFD they appear in and symndx.  */
1450
    {
1451
      key->bfd = abfd;
1452
      key->symndx = symndx;
1453
    }
1454
 
1455
  key->type = reloc_type;
1456
}
1457
 
1458
/* Calculate hash of got_entry.
1459
   ??? Is it good?  */
1460
 
1461
static hashval_t
1462
elf_m68k_got_entry_hash (const void *_entry)
1463
{
1464
  const struct elf_m68k_got_entry_key *key;
1465
 
1466
  key = &((const struct elf_m68k_got_entry *) _entry)->key_;
1467
 
1468
  return (key->symndx
1469
          + (key->bfd != NULL ? (int) key->bfd->id : -1)
1470
          + elf_m68k_reloc_got_type (key->type));
1471
}
1472
 
1473
/* Check if two got entries are equal.  */
1474
 
1475
static int
1476
elf_m68k_got_entry_eq (const void *_entry1, const void *_entry2)
1477
{
1478
  const struct elf_m68k_got_entry_key *key1;
1479
  const struct elf_m68k_got_entry_key *key2;
1480
 
1481
  key1 = &((const struct elf_m68k_got_entry *) _entry1)->key_;
1482
  key2 = &((const struct elf_m68k_got_entry *) _entry2)->key_;
1483
 
1484
  return (key1->bfd == key2->bfd
1485
          && key1->symndx == key2->symndx
1486
          && (elf_m68k_reloc_got_type (key1->type)
1487
              == elf_m68k_reloc_got_type (key2->type)));
1488
}
1489
 
1490
/* When using negative offsets, we allocate one extra R_8, one extra R_16
1491
   and one extra R_32 slots to simplify handling of 2-slot entries during
1492
   offset allocation -- hence -1 for R_8 slots and -2 for R_16 slots.  */
1493
 
1494
/* Maximal number of R_8 slots in a single GOT.  */
1495
#define ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT(INFO)           \
1496
  (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p            \
1497
   ? (0x40 - 1)                                                 \
1498
   : 0x20)
1499
 
1500
/* Maximal number of R_8 and R_16 slots in a single GOT.  */
1501
#define ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT(INFO)                \
1502
  (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p            \
1503
   ? (0x4000 - 2)                                               \
1504
   : 0x2000)
1505
 
1506
/* SEARCH - simply search the hashtable, don't insert new entries or fail when
1507
   the entry cannot be found.
1508
   FIND_OR_CREATE - search for an existing entry, but create new if there's
1509
   no such.
1510
   MUST_FIND - search for an existing entry and assert that it exist.
1511
   MUST_CREATE - assert that there's no such entry and create new one.  */
1512
enum elf_m68k_get_entry_howto
1513
  {
1514
    SEARCH,
1515
    FIND_OR_CREATE,
1516
    MUST_FIND,
1517
    MUST_CREATE
1518
  };
1519
 
1520
/* Get or create (depending on HOWTO) entry with KEY in GOT.
1521
   INFO is context in which memory should be allocated (can be NULL if
1522
   HOWTO is SEARCH or MUST_FIND).  */
1523
 
1524
static struct elf_m68k_got_entry *
1525
elf_m68k_get_got_entry (struct elf_m68k_got *got,
1526
                        const struct elf_m68k_got_entry_key *key,
1527
                        enum elf_m68k_get_entry_howto howto,
1528
                        struct bfd_link_info *info)
1529
{
1530
  struct elf_m68k_got_entry entry_;
1531
  struct elf_m68k_got_entry *entry;
1532
  void **ptr;
1533
 
1534
  BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1535
 
1536
  if (got->entries == NULL)
1537
    /* This is the first entry in ABFD.  Initialize hashtable.  */
1538
    {
1539
      if (howto == SEARCH)
1540
        return NULL;
1541
 
1542
      got->entries = htab_try_create (ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT
1543
                                      (info),
1544
                                      elf_m68k_got_entry_hash,
1545
                                      elf_m68k_got_entry_eq, NULL);
1546
      if (got->entries == NULL)
1547
        {
1548
          bfd_set_error (bfd_error_no_memory);
1549
          return NULL;
1550
        }
1551
    }
1552
 
1553
  entry_.key_ = *key;
1554
  ptr = htab_find_slot (got->entries, &entry_, (howto != SEARCH
1555
                                                ? INSERT : NO_INSERT));
1556
  if (ptr == NULL)
1557
    {
1558
      if (howto == SEARCH)
1559
        /* Entry not found.  */
1560
        return NULL;
1561
 
1562
      /* We're out of memory.  */
1563
      bfd_set_error (bfd_error_no_memory);
1564
      return NULL;
1565
    }
1566
 
1567
  if (*ptr == NULL)
1568
    /* We didn't find the entry and we're asked to create a new one.  */
1569
    {
1570
      BFD_ASSERT (howto != MUST_FIND && howto != SEARCH);
1571
 
1572
      entry = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry));
1573
      if (entry == NULL)
1574
        return NULL;
1575
 
1576
      /* Initialize new entry.  */
1577
      entry->key_ = *key;
1578
 
1579
      entry->u.s1.refcount = 0;
1580
 
1581
      /* Mark the entry as not initialized.  */
1582
      entry->key_.type = R_68K_max;
1583
 
1584
      *ptr = entry;
1585
    }
1586
  else
1587
    /* We found the entry.  */
1588
    {
1589
      BFD_ASSERT (howto != MUST_CREATE);
1590
 
1591
      entry = *ptr;
1592
    }
1593
 
1594
  return entry;
1595
}
1596
 
1597
/* Update GOT counters when merging entry of WAS type with entry of NEW type.
1598
   Return the value to which ENTRY's type should be set.  */
1599
 
1600
static enum elf_m68k_reloc_type
1601
elf_m68k_update_got_entry_type (struct elf_m68k_got *got,
1602
                                enum elf_m68k_reloc_type was,
1603
                                enum elf_m68k_reloc_type new_reloc)
1604
{
1605
  enum elf_m68k_got_offset_size was_size;
1606
  enum elf_m68k_got_offset_size new_size;
1607
  bfd_vma n_slots;
1608
 
1609
  if (was == R_68K_max)
1610
    /* The type of the entry is not initialized yet.  */
1611
    {
1612
      /* Update all got->n_slots counters, including n_slots[R_32].  */
1613
      was_size = R_LAST;
1614
 
1615
      was = new_reloc;
1616
    }
1617
  else
1618
    {
1619
      /* !!! We, probably, should emit an error rather then fail on assert
1620
         in such a case.  */
1621
      BFD_ASSERT (elf_m68k_reloc_got_type (was)
1622
                  == elf_m68k_reloc_got_type (new_reloc));
1623
 
1624
      was_size = elf_m68k_reloc_got_offset_size (was);
1625
    }
1626
 
1627
  new_size = elf_m68k_reloc_got_offset_size (new_reloc);
1628
  n_slots = elf_m68k_reloc_got_n_slots (new_reloc);
1629
 
1630
  while (was_size > new_size)
1631
    {
1632
      --was_size;
1633
      got->n_slots[was_size] += n_slots;
1634
    }
1635
 
1636
  if (new_reloc > was)
1637
    /* Relocations are ordered from bigger got offset size to lesser,
1638
       so choose the relocation type with lesser offset size.  */
1639
    was = new_reloc;
1640
 
1641
  return was;
1642
}
1643
 
1644
/* Update GOT counters when removing an entry of type TYPE.  */
1645
 
1646
static void
1647
elf_m68k_remove_got_entry_type (struct elf_m68k_got *got,
1648
                                enum elf_m68k_reloc_type type)
1649
{
1650
  enum elf_m68k_got_offset_size os;
1651
  bfd_vma n_slots;
1652
 
1653
  n_slots = elf_m68k_reloc_got_n_slots (type);
1654
 
1655
  /* Decrese counter of slots with offset size corresponding to TYPE
1656
     and all greater offset sizes.  */
1657
  for (os = elf_m68k_reloc_got_offset_size (type); os <= R_32; ++os)
1658
    {
1659
      BFD_ASSERT (got->n_slots[os] >= n_slots);
1660
 
1661
      got->n_slots[os] -= n_slots;
1662
    }
1663
}
1664
 
1665
/* Add new or update existing entry to GOT.
1666
   H, ABFD, TYPE and SYMNDX is data for the entry.
1667
   INFO is a context where memory should be allocated.  */
1668
 
1669
static struct elf_m68k_got_entry *
1670
elf_m68k_add_entry_to_got (struct elf_m68k_got *got,
1671
                           struct elf_link_hash_entry *h,
1672
                           const bfd *abfd,
1673
                           enum elf_m68k_reloc_type reloc_type,
1674
                           unsigned long symndx,
1675
                           struct bfd_link_info *info)
1676
{
1677
  struct elf_m68k_got_entry_key key_;
1678
  struct elf_m68k_got_entry *entry;
1679
 
1680
  if (h != NULL && elf_m68k_hash_entry (h)->got_entry_key == 0)
1681
    elf_m68k_hash_entry (h)->got_entry_key
1682
      = elf_m68k_multi_got (info)->global_symndx++;
1683
 
1684
  elf_m68k_init_got_entry_key (&key_, h, abfd, symndx, reloc_type);
1685
 
1686
  entry = elf_m68k_get_got_entry (got, &key_, FIND_OR_CREATE, info);
1687
  if (entry == NULL)
1688
    return NULL;
1689
 
1690
  /* Determine entry's type and update got->n_slots counters.  */
1691
  entry->key_.type = elf_m68k_update_got_entry_type (got,
1692
                                                     entry->key_.type,
1693
                                                     reloc_type);
1694
 
1695
  /* Update refcount.  */
1696
  ++entry->u.s1.refcount;
1697
 
1698
  if (entry->u.s1.refcount == 1)
1699
    /* We see this entry for the first time.  */
1700
    {
1701
      if (entry->key_.bfd != NULL)
1702
        got->local_n_slots += elf_m68k_reloc_got_n_slots (entry->key_.type);
1703
    }
1704
 
1705
  BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots);
1706
 
1707
  if ((got->n_slots[R_8]
1708
       > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1709
      || (got->n_slots[R_16]
1710
          > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
1711
    /* This BFD has too many relocation.  */
1712
    {
1713
      if (got->n_slots[R_8] > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1714
        (*_bfd_error_handler) (_("%B: GOT overflow: "
1715
                                 "Number of relocations with 8-bit "
1716
                                 "offset > %d"),
1717
                               abfd,
1718
                               ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info));
1719
      else
1720
        (*_bfd_error_handler) (_("%B: GOT overflow: "
1721
                                 "Number of relocations with 8- or 16-bit "
1722
                                 "offset > %d"),
1723
                               abfd,
1724
                               ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info));
1725
 
1726
      return NULL;
1727
    }
1728
 
1729
  return entry;
1730
}
1731
 
1732
/* Compute the hash value of the bfd in a bfd2got hash entry.  */
1733
 
1734
static hashval_t
1735
elf_m68k_bfd2got_entry_hash (const void *entry)
1736
{
1737
  const struct elf_m68k_bfd2got_entry *e;
1738
 
1739
  e = (const struct elf_m68k_bfd2got_entry *) entry;
1740
 
1741
  return e->bfd->id;
1742
}
1743
 
1744
/* Check whether two hash entries have the same bfd.  */
1745
 
1746
static int
1747
elf_m68k_bfd2got_entry_eq (const void *entry1, const void *entry2)
1748
{
1749
  const struct elf_m68k_bfd2got_entry *e1;
1750
  const struct elf_m68k_bfd2got_entry *e2;
1751
 
1752
  e1 = (const struct elf_m68k_bfd2got_entry *) entry1;
1753
  e2 = (const struct elf_m68k_bfd2got_entry *) entry2;
1754
 
1755
  return e1->bfd == e2->bfd;
1756
}
1757
 
1758
/* Destruct a bfd2got entry.  */
1759
 
1760
static void
1761
elf_m68k_bfd2got_entry_del (void *_entry)
1762
{
1763
  struct elf_m68k_bfd2got_entry *entry;
1764
 
1765
  entry = (struct elf_m68k_bfd2got_entry *) _entry;
1766
 
1767
  BFD_ASSERT (entry->got != NULL);
1768
  elf_m68k_clear_got (entry->got);
1769
}
1770
 
1771
/* Find existing or create new (depending on HOWTO) bfd2got entry in
1772
   MULTI_GOT.  ABFD is the bfd we need a GOT for.  INFO is a context where
1773
   memory should be allocated.  */
1774
 
1775
static struct elf_m68k_bfd2got_entry *
1776
elf_m68k_get_bfd2got_entry (struct elf_m68k_multi_got *multi_got,
1777
                            const bfd *abfd,
1778
                            enum elf_m68k_get_entry_howto howto,
1779
                            struct bfd_link_info *info)
1780
{
1781
  struct elf_m68k_bfd2got_entry entry_;
1782
  void **ptr;
1783
  struct elf_m68k_bfd2got_entry *entry;
1784
 
1785
  BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1786
 
1787
  if (multi_got->bfd2got == NULL)
1788
    /* This is the first GOT.  Initialize bfd2got.  */
1789
    {
1790
      if (howto == SEARCH)
1791
        return NULL;
1792
 
1793
      multi_got->bfd2got = htab_try_create (1, elf_m68k_bfd2got_entry_hash,
1794
                                            elf_m68k_bfd2got_entry_eq,
1795
                                            elf_m68k_bfd2got_entry_del);
1796
      if (multi_got->bfd2got == NULL)
1797
        {
1798
          bfd_set_error (bfd_error_no_memory);
1799
          return NULL;
1800
        }
1801
    }
1802
 
1803
  entry_.bfd = abfd;
1804
  ptr = htab_find_slot (multi_got->bfd2got, &entry_, (howto != SEARCH
1805
                                                      ? INSERT : NO_INSERT));
1806
  if (ptr == NULL)
1807
    {
1808
      if (howto == SEARCH)
1809
        /* Entry not found.  */
1810
        return NULL;
1811
 
1812
      /* We're out of memory.  */
1813
      bfd_set_error (bfd_error_no_memory);
1814
      return NULL;
1815
    }
1816
 
1817
  if (*ptr == NULL)
1818
    /* Entry was not found.  Create new one.  */
1819
    {
1820
      BFD_ASSERT (howto != MUST_FIND && howto != SEARCH);
1821
 
1822
      entry = ((struct elf_m68k_bfd2got_entry *)
1823
               bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry)));
1824
      if (entry == NULL)
1825
        return NULL;
1826
 
1827
      entry->bfd = abfd;
1828
 
1829
      entry->got = elf_m68k_create_empty_got (info);
1830
      if (entry->got == NULL)
1831
        return NULL;
1832
 
1833
      *ptr = entry;
1834
    }
1835
  else
1836
    {
1837
      BFD_ASSERT (howto != MUST_CREATE);
1838
 
1839
      /* Return existing entry.  */
1840
      entry = *ptr;
1841
    }
1842
 
1843
  return entry;
1844
}
1845
 
1846
struct elf_m68k_can_merge_gots_arg
1847
{
1848
  /* A current_got that we constructing a DIFF against.  */
1849
  struct elf_m68k_got *big;
1850
 
1851
  /* GOT holding entries not present or that should be changed in
1852
     BIG.  */
1853
  struct elf_m68k_got *diff;
1854
 
1855
  /* Context where to allocate memory.  */
1856
  struct bfd_link_info *info;
1857
 
1858
  /* Error flag.  */
1859
  bfd_boolean error_p;
1860
};
1861
 
1862
/* Process a single entry from the small GOT to see if it should be added
1863
   or updated in the big GOT.  */
1864
 
1865
static int
1866
elf_m68k_can_merge_gots_1 (void **_entry_ptr, void *_arg)
1867
{
1868
  const struct elf_m68k_got_entry *entry1;
1869
  struct elf_m68k_can_merge_gots_arg *arg;
1870
  const struct elf_m68k_got_entry *entry2;
1871
  enum elf_m68k_reloc_type type;
1872
 
1873
  entry1 = (const struct elf_m68k_got_entry *) *_entry_ptr;
1874
  arg = (struct elf_m68k_can_merge_gots_arg *) _arg;
1875
 
1876
  entry2 = elf_m68k_get_got_entry (arg->big, &entry1->key_, SEARCH, NULL);
1877
 
1878
  if (entry2 != NULL)
1879
    /* We found an existing entry.  Check if we should update it.  */
1880
    {
1881
      type = elf_m68k_update_got_entry_type (arg->diff,
1882
                                             entry2->key_.type,
1883
                                             entry1->key_.type);
1884
 
1885
      if (type == entry2->key_.type)
1886
        /* ENTRY1 doesn't update data in ENTRY2.  Skip it.
1887
           To skip creation of difference entry we use the type,
1888
           which we won't see in GOT entries for sure.  */
1889
        type = R_68K_max;
1890
    }
1891
  else
1892
    /* We didn't find the entry.  Add entry1 to DIFF.  */
1893
    {
1894
      BFD_ASSERT (entry1->key_.type != R_68K_max);
1895
 
1896
      type = elf_m68k_update_got_entry_type (arg->diff,
1897
                                             R_68K_max, entry1->key_.type);
1898
 
1899
      if (entry1->key_.bfd != NULL)
1900
        arg->diff->local_n_slots += elf_m68k_reloc_got_n_slots (type);
1901
    }
1902
 
1903
  if (type != R_68K_max)
1904
    /* Create an entry in DIFF.  */
1905
    {
1906
      struct elf_m68k_got_entry *entry;
1907
 
1908
      entry = elf_m68k_get_got_entry (arg->diff, &entry1->key_, MUST_CREATE,
1909
                                      arg->info);
1910
      if (entry == NULL)
1911
        {
1912
          arg->error_p = TRUE;
1913
          return 0;
1914
        }
1915
 
1916
      entry->key_.type = type;
1917
    }
1918
 
1919
  return 1;
1920
}
1921
 
1922
/* Return TRUE if SMALL GOT can be added to BIG GOT without overflowing it.
1923
   Construct DIFF GOT holding the entries which should be added or updated
1924
   in BIG GOT to accumulate information from SMALL.
1925
   INFO is the context where memory should be allocated.  */
1926
 
1927
static bfd_boolean
1928
elf_m68k_can_merge_gots (struct elf_m68k_got *big,
1929
                         const struct elf_m68k_got *small,
1930
                         struct bfd_link_info *info,
1931
                         struct elf_m68k_got *diff)
1932
{
1933
  struct elf_m68k_can_merge_gots_arg arg_;
1934
 
1935
  BFD_ASSERT (small->offset == (bfd_vma) -1);
1936
 
1937
  arg_.big = big;
1938
  arg_.diff = diff;
1939
  arg_.info = info;
1940
  arg_.error_p = FALSE;
1941
  htab_traverse_noresize (small->entries, elf_m68k_can_merge_gots_1, &arg_);
1942
  if (arg_.error_p)
1943
    {
1944
      diff->offset = 0;
1945
      return FALSE;
1946
    }
1947
 
1948
  /* Check for overflow.  */
1949
  if ((big->n_slots[R_8] + arg_.diff->n_slots[R_8]
1950
       > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1951
      || (big->n_slots[R_16] + arg_.diff->n_slots[R_16]
1952
          > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
1953
    return FALSE;
1954
 
1955
  return TRUE;
1956
}
1957
 
1958
struct elf_m68k_merge_gots_arg
1959
{
1960
  /* The BIG got.  */
1961
  struct elf_m68k_got *big;
1962
 
1963
  /* Context where memory should be allocated.  */
1964
  struct bfd_link_info *info;
1965
 
1966
  /* Error flag.  */
1967
  bfd_boolean error_p;
1968
};
1969
 
1970
/* Process a single entry from DIFF got.  Add or update corresponding
1971
   entry in the BIG got.  */
1972
 
1973
static int
1974
elf_m68k_merge_gots_1 (void **entry_ptr, void *_arg)
1975
{
1976
  const struct elf_m68k_got_entry *from;
1977
  struct elf_m68k_merge_gots_arg *arg;
1978
  struct elf_m68k_got_entry *to;
1979
 
1980
  from = (const struct elf_m68k_got_entry *) *entry_ptr;
1981
  arg = (struct elf_m68k_merge_gots_arg *) _arg;
1982
 
1983
  to = elf_m68k_get_got_entry (arg->big, &from->key_, FIND_OR_CREATE,
1984
                               arg->info);
1985
  if (to == NULL)
1986
    {
1987
      arg->error_p = TRUE;
1988
      return 0;
1989
    }
1990
 
1991
  BFD_ASSERT (to->u.s1.refcount == 0);
1992
  /* All we need to merge is TYPE.  */
1993
  to->key_.type = from->key_.type;
1994
 
1995
  return 1;
1996
}
1997
 
1998
/* Merge data from DIFF to BIG.  INFO is context where memory should be
1999
   allocated.  */
2000
 
2001
static bfd_boolean
2002
elf_m68k_merge_gots (struct elf_m68k_got *big,
2003
                     struct elf_m68k_got *diff,
2004
                     struct bfd_link_info *info)
2005
{
2006
  if (diff->entries != NULL)
2007
    /* DIFF is not empty.  Merge it into BIG GOT.  */
2008
    {
2009
      struct elf_m68k_merge_gots_arg arg_;
2010
 
2011
      /* Merge entries.  */
2012
      arg_.big = big;
2013
      arg_.info = info;
2014
      arg_.error_p = FALSE;
2015
      htab_traverse_noresize (diff->entries, elf_m68k_merge_gots_1, &arg_);
2016
      if (arg_.error_p)
2017
        return FALSE;
2018
 
2019
      /* Merge counters.  */
2020
      big->n_slots[R_8] += diff->n_slots[R_8];
2021
      big->n_slots[R_16] += diff->n_slots[R_16];
2022
      big->n_slots[R_32] += diff->n_slots[R_32];
2023
      big->local_n_slots += diff->local_n_slots;
2024
    }
2025
  else
2026
    /* DIFF is empty.  */
2027
    {
2028
      BFD_ASSERT (diff->n_slots[R_8] == 0);
2029
      BFD_ASSERT (diff->n_slots[R_16] == 0);
2030
      BFD_ASSERT (diff->n_slots[R_32] == 0);
2031
      BFD_ASSERT (diff->local_n_slots == 0);
2032
    }
2033
 
2034
  BFD_ASSERT (!elf_m68k_hash_table (info)->allow_multigot_p
2035
              || ((big->n_slots[R_8]
2036
                   <= ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
2037
                  && (big->n_slots[R_16]
2038
                      <= ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info))));
2039
 
2040
  return TRUE;
2041
}
2042
 
2043
struct elf_m68k_finalize_got_offsets_arg
2044
{
2045
  /* Ranges of the offsets for GOT entries.
2046
     R_x entries receive offsets between offset1[R_x] and offset2[R_x].
2047
     R_x is R_8, R_16 and R_32.  */
2048
  bfd_vma *offset1;
2049
  bfd_vma *offset2;
2050
 
2051
  /* Mapping from global symndx to global symbols.
2052
     This is used to build lists of got entries for global symbols.  */
2053
  struct elf_m68k_link_hash_entry **symndx2h;
2054
 
2055
  bfd_vma n_ldm_entries;
2056
};
2057
 
2058
/* Assign ENTRY an offset.  Build list of GOT entries for global symbols
2059
   along the way.  */
2060
 
2061
static int
2062
elf_m68k_finalize_got_offsets_1 (void **entry_ptr, void *_arg)
2063
{
2064
  struct elf_m68k_got_entry *entry;
2065
  struct elf_m68k_finalize_got_offsets_arg *arg;
2066
 
2067
  enum elf_m68k_got_offset_size got_offset_size;
2068
  bfd_vma entry_size;
2069
 
2070
  entry = (struct elf_m68k_got_entry *) *entry_ptr;
2071
  arg = (struct elf_m68k_finalize_got_offsets_arg *) _arg;
2072
 
2073
  /* This should be a fresh entry created in elf_m68k_can_merge_gots.  */
2074
  BFD_ASSERT (entry->u.s1.refcount == 0);
2075
 
2076
  /* Get GOT offset size for the entry .  */
2077
  got_offset_size = elf_m68k_reloc_got_offset_size (entry->key_.type);
2078
 
2079
  /* Calculate entry size in bytes.  */
2080
  entry_size = 4 * elf_m68k_reloc_got_n_slots (entry->key_.type);
2081
 
2082
  /* Check if we should switch to negative range of the offsets. */
2083
  if (arg->offset1[got_offset_size] + entry_size
2084
      > arg->offset2[got_offset_size])
2085
    {
2086
      /* Verify that this is the only switch to negative range for
2087
         got_offset_size.  If this assertion fails, then we've miscalculated
2088
         range for got_offset_size entries in
2089
         elf_m68k_finalize_got_offsets.  */
2090
      BFD_ASSERT (arg->offset2[got_offset_size]
2091
                  != arg->offset2[-(int) got_offset_size - 1]);
2092
 
2093
      /* Switch.  */
2094
      arg->offset1[got_offset_size] = arg->offset1[-(int) got_offset_size - 1];
2095
      arg->offset2[got_offset_size] = arg->offset2[-(int) got_offset_size - 1];
2096
 
2097
      /* Verify that now we have enough room for the entry.  */
2098
      BFD_ASSERT (arg->offset1[got_offset_size] + entry_size
2099
                  <= arg->offset2[got_offset_size]);
2100
    }
2101
 
2102
  /* Assign offset to entry.  */
2103
  entry->u.s2.offset = arg->offset1[got_offset_size];
2104
  arg->offset1[got_offset_size] += entry_size;
2105
 
2106
  if (entry->key_.bfd == NULL)
2107
    /* Hook up this entry into the list of got_entries of H.  */
2108
    {
2109
      struct elf_m68k_link_hash_entry *h;
2110
 
2111
      h = arg->symndx2h[entry->key_.symndx];
2112
      if (h != NULL)
2113
        {
2114
          entry->u.s2.next = h->glist;
2115
          h->glist = entry;
2116
        }
2117
      else
2118
        /* This should be the entry for TLS_LDM relocation then.  */
2119
        {
2120
          BFD_ASSERT ((elf_m68k_reloc_got_type (entry->key_.type)
2121
                       == R_68K_TLS_LDM32)
2122
                      && entry->key_.symndx == 0);
2123
 
2124
          ++arg->n_ldm_entries;
2125
        }
2126
    }
2127
  else
2128
    /* This entry is for local symbol.  */
2129
    entry->u.s2.next = NULL;
2130
 
2131
  return 1;
2132
}
2133
 
2134
/* Assign offsets within GOT.  USE_NEG_GOT_OFFSETS_P indicates if we
2135
   should use negative offsets.
2136
   Build list of GOT entries for global symbols along the way.
2137
   SYMNDX2H is mapping from global symbol indices to actual
2138
   global symbols.
2139
   Return offset at which next GOT should start.  */
2140
 
2141
static void
2142
elf_m68k_finalize_got_offsets (struct elf_m68k_got *got,
2143
                               bfd_boolean use_neg_got_offsets_p,
2144
                               struct elf_m68k_link_hash_entry **symndx2h,
2145
                               bfd_vma *final_offset, bfd_vma *n_ldm_entries)
2146
{
2147
  struct elf_m68k_finalize_got_offsets_arg arg_;
2148
  bfd_vma offset1_[2 * R_LAST];
2149
  bfd_vma offset2_[2 * R_LAST];
2150
  int i;
2151
  bfd_vma start_offset;
2152
 
2153
  BFD_ASSERT (got->offset != (bfd_vma) -1);
2154
 
2155
  /* We set entry offsets relative to the .got section (and not the
2156
     start of a particular GOT), so that we can use them in
2157
     finish_dynamic_symbol without needing to know the GOT which they come
2158
     from.  */
2159
 
2160
  /* Put offset1 in the middle of offset1_, same for offset2.  */
2161
  arg_.offset1 = offset1_ + R_LAST;
2162
  arg_.offset2 = offset2_ + R_LAST;
2163
 
2164
  start_offset = got->offset;
2165
 
2166
  if (use_neg_got_offsets_p)
2167
    /* Setup both negative and positive ranges for R_8, R_16 and R_32.  */
2168
    i = -(int) R_32 - 1;
2169
  else
2170
    /* Setup positives ranges for R_8, R_16 and R_32.  */
2171
    i = (int) R_8;
2172
 
2173
  for (; i <= (int) R_32; ++i)
2174
    {
2175
      int j;
2176
      size_t n;
2177
 
2178
      /* Set beginning of the range of offsets I.  */
2179
      arg_.offset1[i] = start_offset;
2180
 
2181
      /* Calculate number of slots that require I offsets.  */
2182
      j = (i >= 0) ? i : -i - 1;
2183
      n = (j >= 1) ? got->n_slots[j - 1] : 0;
2184
      n = got->n_slots[j] - n;
2185
 
2186
      if (use_neg_got_offsets_p && n != 0)
2187
        {
2188
          if (i < 0)
2189
            /* We first fill the positive side of the range, so we might
2190
               end up with one empty slot at that side when we can't fit
2191
               whole 2-slot entry.  Account for that at negative side of
2192
               the interval with one additional entry.  */
2193
            n = n / 2 + 1;
2194
          else
2195
            /* When the number of slots is odd, make positive side of the
2196
               range one entry bigger.  */
2197
            n = (n + 1) / 2;
2198
        }
2199
 
2200
      /* N is the number of slots that require I offsets.
2201
         Calculate length of the range for I offsets.  */
2202
      n = 4 * n;
2203
 
2204
      /* Set end of the range.  */
2205
      arg_.offset2[i] = start_offset + n;
2206
 
2207
      start_offset = arg_.offset2[i];
2208
    }
2209
 
2210
  if (!use_neg_got_offsets_p)
2211
    /* Make sure that if we try to switch to negative offsets in
2212
       elf_m68k_finalize_got_offsets_1, the assert therein will catch
2213
       the bug.  */
2214
    for (i = R_8; i <= R_32; ++i)
2215
      arg_.offset2[-i - 1] = arg_.offset2[i];
2216
 
2217
  /* Setup got->offset.  offset1[R_8] is either in the middle or at the
2218
     beginning of GOT depending on use_neg_got_offsets_p.  */
2219
  got->offset = arg_.offset1[R_8];
2220
 
2221
  arg_.symndx2h = symndx2h;
2222
  arg_.n_ldm_entries = 0;
2223
 
2224
  /* Assign offsets.  */
2225
  htab_traverse (got->entries, elf_m68k_finalize_got_offsets_1, &arg_);
2226
 
2227
  /* Check offset ranges we have actually assigned.  */
2228
  for (i = (int) R_8; i <= (int) R_32; ++i)
2229
    BFD_ASSERT (arg_.offset2[i] - arg_.offset1[i] <= 4);
2230
 
2231
  *final_offset = start_offset;
2232
  *n_ldm_entries = arg_.n_ldm_entries;
2233
}
2234
 
2235
struct elf_m68k_partition_multi_got_arg
2236
{
2237
  /* The GOT we are adding entries to.  Aka big got.  */
2238
  struct elf_m68k_got *current_got;
2239
 
2240
  /* Offset to assign the next CURRENT_GOT.  */
2241
  bfd_vma offset;
2242
 
2243
  /* Context where memory should be allocated.  */
2244
  struct bfd_link_info *info;
2245
 
2246
  /* Total number of slots in the .got section.
2247
     This is used to calculate size of the .got and .rela.got sections.  */
2248
  bfd_vma n_slots;
2249
 
2250
  /* Difference in numbers of allocated slots in the .got section
2251
     and necessary relocations in the .rela.got section.
2252
     This is used to calculate size of the .rela.got section.  */
2253
  bfd_vma slots_relas_diff;
2254
 
2255
  /* Error flag.  */
2256
  bfd_boolean error_p;
2257
 
2258
  /* Mapping from global symndx to global symbols.
2259
     This is used to build lists of got entries for global symbols.  */
2260
  struct elf_m68k_link_hash_entry **symndx2h;
2261
};
2262
 
2263
static void
2264
elf_m68k_partition_multi_got_2 (struct elf_m68k_partition_multi_got_arg *arg)
2265
{
2266
  bfd_vma n_ldm_entries;
2267
 
2268
  elf_m68k_finalize_got_offsets (arg->current_got,
2269
                                 (elf_m68k_hash_table (arg->info)
2270
                                  ->use_neg_got_offsets_p),
2271
                                 arg->symndx2h,
2272
                                 &arg->offset, &n_ldm_entries);
2273
 
2274
  arg->n_slots += arg->current_got->n_slots[R_32];
2275
 
2276
  if (!arg->info->shared)
2277
    /* If we are generating a shared object, we need to
2278
       output a R_68K_RELATIVE reloc so that the dynamic
2279
       linker can adjust this GOT entry.  Overwise we
2280
       don't need space in .rela.got for local symbols.  */
2281
    arg->slots_relas_diff += arg->current_got->local_n_slots;
2282
 
2283
  /* @LDM relocations require a 2-slot GOT entry, but only
2284
     one relocation.  Account for that.  */
2285
  arg->slots_relas_diff += n_ldm_entries;
2286
 
2287
  BFD_ASSERT (arg->slots_relas_diff <= arg->n_slots);
2288
}
2289
 
2290
 
2291
/* Process a single BFD2GOT entry and either merge GOT to CURRENT_GOT
2292
   or start a new CURRENT_GOT.  */
2293
 
2294
static int
2295
elf_m68k_partition_multi_got_1 (void **_entry, void *_arg)
2296
{
2297
  struct elf_m68k_bfd2got_entry *entry;
2298
  struct elf_m68k_partition_multi_got_arg *arg;
2299
  struct elf_m68k_got *got;
2300
  struct elf_m68k_got diff_;
2301
  struct elf_m68k_got *diff;
2302
 
2303
  entry = (struct elf_m68k_bfd2got_entry *) *_entry;
2304
  arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2305
 
2306
  got = entry->got;
2307
  BFD_ASSERT (got != NULL);
2308
  BFD_ASSERT (got->offset == (bfd_vma) -1);
2309
 
2310
  diff = NULL;
2311
 
2312
  if (arg->current_got != NULL)
2313
    /* Construct diff.  */
2314
    {
2315
      diff = &diff_;
2316
      elf_m68k_init_got (diff);
2317
 
2318
      if (!elf_m68k_can_merge_gots (arg->current_got, got, arg->info, diff))
2319
        {
2320
          if (diff->offset == 0)
2321
            /* Offset set to 0 in the diff_ indicates an error.  */
2322
            {
2323
              arg->error_p = TRUE;
2324
              goto final_return;
2325
            }
2326
 
2327
          if (elf_m68k_hash_table (arg->info)->allow_multigot_p)
2328
            {
2329
              elf_m68k_clear_got (diff);
2330
              /* Schedule to finish up current_got and start new one.  */
2331
              diff = NULL;
2332
            }
2333
          /* else
2334
             Merge GOTs no matter what.  If big GOT overflows,
2335
             we'll fail in relocate_section due to truncated relocations.
2336
 
2337
             ??? May be fail earlier?  E.g., in can_merge_gots.  */
2338
        }
2339
    }
2340
  else
2341
    /* Diff of got against empty current_got is got itself.  */
2342
    {
2343
      /* Create empty current_got to put subsequent GOTs to.  */
2344
      arg->current_got = elf_m68k_create_empty_got (arg->info);
2345
      if (arg->current_got == NULL)
2346
        {
2347
          arg->error_p = TRUE;
2348
          goto final_return;
2349
        }
2350
 
2351
      arg->current_got->offset = arg->offset;
2352
 
2353
      diff = got;
2354
    }
2355
 
2356
  if (diff != NULL)
2357
    {
2358
      if (!elf_m68k_merge_gots (arg->current_got, diff, arg->info))
2359
        {
2360
          arg->error_p = TRUE;
2361
          goto final_return;
2362
        }
2363
 
2364
      /* Now we can free GOT.  */
2365
      elf_m68k_clear_got (got);
2366
 
2367
      entry->got = arg->current_got;
2368
    }
2369
  else
2370
    {
2371
      /* Finish up current_got.  */
2372
      elf_m68k_partition_multi_got_2 (arg);
2373
 
2374
      /* Schedule to start a new current_got.  */
2375
      arg->current_got = NULL;
2376
 
2377
      /* Retry.  */
2378
      if (!elf_m68k_partition_multi_got_1 (_entry, _arg))
2379
        {
2380
          BFD_ASSERT (arg->error_p);
2381
          goto final_return;
2382
        }
2383
    }
2384
 
2385
 final_return:
2386
  if (diff != NULL)
2387
    elf_m68k_clear_got (diff);
2388
 
2389
  return arg->error_p == FALSE ? 1 : 0;
2390
}
2391
 
2392
/* Helper function to build symndx2h mapping.  */
2393
 
2394
static bfd_boolean
2395
elf_m68k_init_symndx2h_1 (struct elf_link_hash_entry *_h,
2396
                          void *_arg)
2397
{
2398
  struct elf_m68k_link_hash_entry *h;
2399
 
2400
  h = elf_m68k_hash_entry (_h);
2401
 
2402
  if (h->got_entry_key != 0)
2403
    /* H has at least one entry in the GOT.  */
2404
    {
2405
      struct elf_m68k_partition_multi_got_arg *arg;
2406
 
2407
      arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2408
 
2409
      BFD_ASSERT (arg->symndx2h[h->got_entry_key] == NULL);
2410
      arg->symndx2h[h->got_entry_key] = h;
2411
    }
2412
 
2413
  return TRUE;
2414
}
2415
 
2416
/* Merge GOTs of some BFDs, assign offsets to GOT entries and build
2417
   lists of GOT entries for global symbols.
2418
   Calculate sizes of .got and .rela.got sections.  */
2419
 
2420
static bfd_boolean
2421
elf_m68k_partition_multi_got (struct bfd_link_info *info)
2422
{
2423
  struct elf_m68k_multi_got *multi_got;
2424
  struct elf_m68k_partition_multi_got_arg arg_;
2425
 
2426
  multi_got = elf_m68k_multi_got (info);
2427
 
2428
  arg_.current_got = NULL;
2429
  arg_.offset = 0;
2430
  arg_.info = info;
2431
  arg_.n_slots = 0;
2432
  arg_.slots_relas_diff = 0;
2433
  arg_.error_p = FALSE;
2434
 
2435
  if (multi_got->bfd2got != NULL)
2436
    {
2437
      /* Initialize symndx2h mapping.  */
2438
      {
2439
        arg_.symndx2h = bfd_zmalloc (multi_got->global_symndx
2440
                                     * sizeof (*arg_.symndx2h));
2441
        if (arg_.symndx2h == NULL)
2442
          return FALSE;
2443
 
2444
        elf_link_hash_traverse (elf_hash_table (info),
2445
                                elf_m68k_init_symndx2h_1, &arg_);
2446
      }
2447
 
2448
      /* Partition.  */
2449
      htab_traverse (multi_got->bfd2got, elf_m68k_partition_multi_got_1,
2450
                     &arg_);
2451
      if (arg_.error_p)
2452
        {
2453
          free (arg_.symndx2h);
2454
          arg_.symndx2h = NULL;
2455
 
2456
          return FALSE;
2457
        }
2458
 
2459
      /* Finish up last current_got.  */
2460
      elf_m68k_partition_multi_got_2 (&arg_);
2461
 
2462
      free (arg_.symndx2h);
2463
    }
2464
 
2465
  if (elf_hash_table (info)->dynobj != NULL)
2466
    /* Set sizes of .got and .rela.got sections.  */
2467
    {
2468
      asection *s;
2469
 
2470
      s = bfd_get_section_by_name (elf_hash_table (info)->dynobj, ".got");
2471
      if (s != NULL)
2472
        s->size = arg_.offset;
2473
      else
2474
        BFD_ASSERT (arg_.offset == 0);
2475
 
2476
      BFD_ASSERT (arg_.slots_relas_diff <= arg_.n_slots);
2477
      arg_.n_slots -= arg_.slots_relas_diff;
2478
 
2479
      s = bfd_get_section_by_name (elf_hash_table (info)->dynobj, ".rela.got");
2480
      if (s != NULL)
2481
        s->size = arg_.n_slots * sizeof (Elf32_External_Rela);
2482
      else
2483
        BFD_ASSERT (arg_.n_slots == 0);
2484
    }
2485
  else
2486
    BFD_ASSERT (multi_got->bfd2got == NULL);
2487
 
2488
  return TRUE;
2489
}
2490
 
2491
/* Specialized version of elf_m68k_get_got_entry that returns pointer
2492
   to hashtable slot, thus allowing removal of entry via
2493
   elf_m68k_remove_got_entry.  */
2494
 
2495
static struct elf_m68k_got_entry **
2496
elf_m68k_find_got_entry_ptr (struct elf_m68k_got *got,
2497
                             struct elf_m68k_got_entry_key *key)
2498
{
2499
  void **ptr;
2500
  struct elf_m68k_got_entry entry_;
2501
  struct elf_m68k_got_entry **entry_ptr;
2502
 
2503
  entry_.key_ = *key;
2504
  ptr = htab_find_slot (got->entries, &entry_, NO_INSERT);
2505
  BFD_ASSERT (ptr != NULL);
2506
 
2507
  entry_ptr = (struct elf_m68k_got_entry **) ptr;
2508
 
2509
  return entry_ptr;
2510
}
2511
 
2512
/* Remove entry pointed to by ENTRY_PTR from GOT.  */
2513
 
2514
static void
2515
elf_m68k_remove_got_entry (struct elf_m68k_got *got,
2516
                           struct elf_m68k_got_entry **entry_ptr)
2517
{
2518
  struct elf_m68k_got_entry *entry;
2519
 
2520
  entry = *entry_ptr;
2521
 
2522
  /* Check that offsets have not been finalized yet.  */
2523
  BFD_ASSERT (got->offset == (bfd_vma) -1);
2524
  /* Check that this entry is indeed unused.  */
2525
  BFD_ASSERT (entry->u.s1.refcount == 0);
2526
 
2527
  elf_m68k_remove_got_entry_type (got, entry->key_.type);
2528
 
2529
  if (entry->key_.bfd != NULL)
2530
    got->local_n_slots -= elf_m68k_reloc_got_n_slots (entry->key_.type);
2531
 
2532
  BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots);
2533
 
2534
  htab_clear_slot (got->entries, (void **) entry_ptr);
2535
}
2536
 
2537
/* Copy any information related to dynamic linking from a pre-existing
2538
   symbol to a newly created symbol.  Also called to copy flags and
2539
   other back-end info to a weakdef, in which case the symbol is not
2540
   newly created and plt/got refcounts and dynamic indices should not
2541
   be copied.  */
2542
 
2543
static void
2544
elf_m68k_copy_indirect_symbol (struct bfd_link_info *info,
2545
                               struct elf_link_hash_entry *_dir,
2546
                               struct elf_link_hash_entry *_ind)
2547
{
2548
  struct elf_m68k_link_hash_entry *dir;
2549
  struct elf_m68k_link_hash_entry *ind;
2550
 
2551
  _bfd_elf_link_hash_copy_indirect (info, _dir, _ind);
2552
 
2553
  if (_ind->root.type != bfd_link_hash_indirect)
2554
    return;
2555
 
2556
  dir = elf_m68k_hash_entry (_dir);
2557
  ind = elf_m68k_hash_entry (_ind);
2558
 
2559
  /* Any absolute non-dynamic relocations against an indirect or weak
2560
     definition will be against the target symbol.  */
2561
  _dir->non_got_ref |= _ind->non_got_ref;
2562
 
2563
  /* We might have a direct symbol already having entries in the GOTs.
2564
     Update its key only in case indirect symbol has GOT entries and
2565
     assert that both indirect and direct symbols don't have GOT entries
2566
     at the same time.  */
2567
  if (ind->got_entry_key != 0)
2568
    {
2569
      BFD_ASSERT (dir->got_entry_key == 0);
2570
      /* Assert that GOTs aren't partioned yet.  */
2571
      BFD_ASSERT (ind->glist == NULL);
2572
 
2573
      dir->got_entry_key = ind->got_entry_key;
2574
      ind->got_entry_key = 0;
2575
    }
2576
}
2577
 
2578
/* Look through the relocs for a section during the first phase, and
2579
   allocate space in the global offset table or procedure linkage
2580
   table.  */
2581
 
2582
static bfd_boolean
2583
elf_m68k_check_relocs (abfd, info, sec, relocs)
2584
     bfd *abfd;
2585
     struct bfd_link_info *info;
2586
     asection *sec;
2587
     const Elf_Internal_Rela *relocs;
2588
{
2589
  bfd *dynobj;
2590
  Elf_Internal_Shdr *symtab_hdr;
2591
  struct elf_link_hash_entry **sym_hashes;
2592
  const Elf_Internal_Rela *rel;
2593
  const Elf_Internal_Rela *rel_end;
2594
  asection *sgot;
2595
  asection *srelgot;
2596
  asection *sreloc;
2597
  struct elf_m68k_got *got;
2598
 
2599
  if (info->relocatable)
2600
    return TRUE;
2601
 
2602
  dynobj = elf_hash_table (info)->dynobj;
2603
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2604
  sym_hashes = elf_sym_hashes (abfd);
2605
 
2606
  sgot = NULL;
2607
  srelgot = NULL;
2608
  sreloc = NULL;
2609
 
2610
  got = NULL;
2611
 
2612
  rel_end = relocs + sec->reloc_count;
2613
  for (rel = relocs; rel < rel_end; rel++)
2614
    {
2615
      unsigned long r_symndx;
2616
      struct elf_link_hash_entry *h;
2617
 
2618
      r_symndx = ELF32_R_SYM (rel->r_info);
2619
 
2620
      if (r_symndx < symtab_hdr->sh_info)
2621
        h = NULL;
2622
      else
2623
        {
2624
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2625
          while (h->root.type == bfd_link_hash_indirect
2626
                 || h->root.type == bfd_link_hash_warning)
2627
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
2628
        }
2629
 
2630
      switch (ELF32_R_TYPE (rel->r_info))
2631
        {
2632
        case R_68K_GOT8:
2633
        case R_68K_GOT16:
2634
        case R_68K_GOT32:
2635
          if (h != NULL
2636
              && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2637
            break;
2638
          /* Fall through.  */
2639
 
2640
          /* Relative GOT relocations.  */
2641
        case R_68K_GOT8O:
2642
        case R_68K_GOT16O:
2643
        case R_68K_GOT32O:
2644
          /* Fall through.  */
2645
 
2646
          /* TLS relocations.  */
2647
        case R_68K_TLS_GD8:
2648
        case R_68K_TLS_GD16:
2649
        case R_68K_TLS_GD32:
2650
        case R_68K_TLS_LDM8:
2651
        case R_68K_TLS_LDM16:
2652
        case R_68K_TLS_LDM32:
2653
        case R_68K_TLS_IE8:
2654
        case R_68K_TLS_IE16:
2655
        case R_68K_TLS_IE32:
2656
 
2657
        case R_68K_TLS_TPREL32:
2658
        case R_68K_TLS_DTPREL32:
2659
 
2660
          if (ELF32_R_TYPE (rel->r_info) == R_68K_TLS_TPREL32
2661
              && info->shared)
2662
            /* Do the special chorus for libraries with static TLS.  */
2663
            info->flags |= DF_STATIC_TLS;
2664
 
2665
          /* This symbol requires a global offset table entry.  */
2666
 
2667
          if (dynobj == NULL)
2668
            {
2669
              /* Create the .got section.  */
2670
              elf_hash_table (info)->dynobj = dynobj = abfd;
2671
              if (!_bfd_elf_create_got_section (dynobj, info))
2672
                return FALSE;
2673
            }
2674
 
2675
          if (sgot == NULL)
2676
            {
2677
              sgot = bfd_get_section_by_name (dynobj, ".got");
2678
              BFD_ASSERT (sgot != NULL);
2679
            }
2680
 
2681
          if (srelgot == NULL
2682
              && (h != NULL || info->shared))
2683
            {
2684
              srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2685
              if (srelgot == NULL)
2686
                {
2687
                  srelgot = bfd_make_section_with_flags (dynobj,
2688
                                                         ".rela.got",
2689
                                                         (SEC_ALLOC
2690
                                                          | SEC_LOAD
2691
                                                          | SEC_HAS_CONTENTS
2692
                                                          | SEC_IN_MEMORY
2693
                                                          | SEC_LINKER_CREATED
2694
                                                          | SEC_READONLY));
2695
                  if (srelgot == NULL
2696
                      || !bfd_set_section_alignment (dynobj, srelgot, 2))
2697
                    return FALSE;
2698
                }
2699
            }
2700
 
2701
          if (got == NULL)
2702
            {
2703
              struct elf_m68k_bfd2got_entry *bfd2got_entry;
2704
 
2705
              bfd2got_entry
2706
                = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
2707
                                              abfd, FIND_OR_CREATE, info);
2708
              if (bfd2got_entry == NULL)
2709
                return FALSE;
2710
 
2711
              got = bfd2got_entry->got;
2712
              BFD_ASSERT (got != NULL);
2713
            }
2714
 
2715
          {
2716
            struct elf_m68k_got_entry *got_entry;
2717
 
2718
            /* Add entry to got.  */
2719
            got_entry = elf_m68k_add_entry_to_got (got, h, abfd,
2720
                                                   ELF32_R_TYPE (rel->r_info),
2721
                                                   r_symndx, info);
2722
            if (got_entry == NULL)
2723
              return FALSE;
2724
 
2725
            if (got_entry->u.s1.refcount == 1)
2726
              {
2727
                /* Make sure this symbol is output as a dynamic symbol.  */
2728
                if (h != NULL
2729
                    && h->dynindx == -1
2730
                    && !h->forced_local)
2731
                  {
2732
                    if (!bfd_elf_link_record_dynamic_symbol (info, h))
2733
                      return FALSE;
2734
                  }
2735
              }
2736
          }
2737
 
2738
          break;
2739
 
2740
        case R_68K_PLT8:
2741
        case R_68K_PLT16:
2742
        case R_68K_PLT32:
2743
          /* This symbol requires a procedure linkage table entry.  We
2744
             actually build the entry in adjust_dynamic_symbol,
2745
             because this might be a case of linking PIC code which is
2746
             never referenced by a dynamic object, in which case we
2747
             don't need to generate a procedure linkage table entry
2748
             after all.  */
2749
 
2750
          /* If this is a local symbol, we resolve it directly without
2751
             creating a procedure linkage table entry.  */
2752
          if (h == NULL)
2753
            continue;
2754
 
2755
          h->needs_plt = 1;
2756
          h->plt.refcount++;
2757
          break;
2758
 
2759
        case R_68K_PLT8O:
2760
        case R_68K_PLT16O:
2761
        case R_68K_PLT32O:
2762
          /* This symbol requires a procedure linkage table entry.  */
2763
 
2764
          if (h == NULL)
2765
            {
2766
              /* It does not make sense to have this relocation for a
2767
                 local symbol.  FIXME: does it?  How to handle it if
2768
                 it does make sense?  */
2769
              bfd_set_error (bfd_error_bad_value);
2770
              return FALSE;
2771
            }
2772
 
2773
          /* Make sure this symbol is output as a dynamic symbol.  */
2774
          if (h->dynindx == -1
2775
              && !h->forced_local)
2776
            {
2777
              if (!bfd_elf_link_record_dynamic_symbol (info, h))
2778
                return FALSE;
2779
            }
2780
 
2781
          h->needs_plt = 1;
2782
          h->plt.refcount++;
2783
          break;
2784
 
2785
        case R_68K_PC8:
2786
        case R_68K_PC16:
2787
        case R_68K_PC32:
2788
          /* If we are creating a shared library and this is not a local
2789
             symbol, we need to copy the reloc into the shared library.
2790
             However when linking with -Bsymbolic and this is a global
2791
             symbol which is defined in an object we are including in the
2792
             link (i.e., DEF_REGULAR is set), then we can resolve the
2793
             reloc directly.  At this point we have not seen all the input
2794
             files, so it is possible that DEF_REGULAR is not set now but
2795
             will be set later (it is never cleared).  We account for that
2796
             possibility below by storing information in the
2797
             pcrel_relocs_copied field of the hash table entry.  */
2798
          if (!(info->shared
2799
                && (sec->flags & SEC_ALLOC) != 0
2800
                && h != NULL
2801
                && (!info->symbolic
2802
                    || h->root.type == bfd_link_hash_defweak
2803
                    || !h->def_regular)))
2804
            {
2805
              if (h != NULL)
2806
                {
2807
                  /* Make sure a plt entry is created for this symbol if
2808
                     it turns out to be a function defined by a dynamic
2809
                     object.  */
2810
                  h->plt.refcount++;
2811
                }
2812
              break;
2813
            }
2814
          /* Fall through.  */
2815
        case R_68K_8:
2816
        case R_68K_16:
2817
        case R_68K_32:
2818
          if (h != NULL)
2819
            {
2820
              /* Make sure a plt entry is created for this symbol if it
2821
                 turns out to be a function defined by a dynamic object.  */
2822
              h->plt.refcount++;
2823
 
2824
              if (!info->shared)
2825
                /* This symbol needs a non-GOT reference.  */
2826
                h->non_got_ref = 1;
2827
            }
2828
 
2829
          /* If we are creating a shared library, we need to copy the
2830
             reloc into the shared library.  */
2831
          if (info->shared
2832
              && (sec->flags & SEC_ALLOC) != 0)
2833
            {
2834
              /* When creating a shared object, we must copy these
2835
                 reloc types into the output file.  We create a reloc
2836
                 section in dynobj and make room for this reloc.  */
2837
              if (sreloc == NULL)
2838
                {
2839
                  sreloc = _bfd_elf_make_dynamic_reloc_section
2840
                    (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
2841
 
2842
                  if (sreloc == NULL)
2843
                    return FALSE;
2844
                }
2845
 
2846
              if (sec->flags & SEC_READONLY
2847
                  /* Don't set DF_TEXTREL yet for PC relative
2848
                     relocations, they might be discarded later.  */
2849
                  && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2850
                       || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2851
                       || ELF32_R_TYPE (rel->r_info) == R_68K_PC32))
2852
                    info->flags |= DF_TEXTREL;
2853
 
2854
              sreloc->size += sizeof (Elf32_External_Rela);
2855
 
2856
              /* We count the number of PC relative relocations we have
2857
                 entered for this symbol, so that we can discard them
2858
                 again if, in the -Bsymbolic case, the symbol is later
2859
                 defined by a regular object, or, in the normal shared
2860
                 case, the symbol is forced to be local.  Note that this
2861
                 function is only called if we are using an m68kelf linker
2862
                 hash table, which means that h is really a pointer to an
2863
                 elf_m68k_link_hash_entry.  */
2864
              if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2865
                  || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2866
                  || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)
2867
                {
2868
                  struct elf_m68k_pcrel_relocs_copied *p;
2869
                  struct elf_m68k_pcrel_relocs_copied **head;
2870
 
2871
                  if (h != NULL)
2872
                    {
2873
                      struct elf_m68k_link_hash_entry *eh
2874
                        = elf_m68k_hash_entry (h);
2875
                      head = &eh->pcrel_relocs_copied;
2876
                    }
2877
                  else
2878
                    {
2879
                      asection *s;
2880
                      void *vpp;
2881
                      Elf_Internal_Sym *isym;
2882
 
2883
                      isym = bfd_sym_from_r_symndx (&elf_m68k_hash_table (info)->sym_cache,
2884
                                                    abfd, r_symndx);
2885
                      if (isym == NULL)
2886
                        return FALSE;
2887
 
2888
                      s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2889
                      if (s == NULL)
2890
                        s = sec;
2891
 
2892
                      vpp = &elf_section_data (s)->local_dynrel;
2893
                      head = (struct elf_m68k_pcrel_relocs_copied **) vpp;
2894
                    }
2895
 
2896
                  for (p = *head; p != NULL; p = p->next)
2897
                    if (p->section == sreloc)
2898
                      break;
2899
 
2900
                  if (p == NULL)
2901
                    {
2902
                      p = ((struct elf_m68k_pcrel_relocs_copied *)
2903
                           bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2904
                      if (p == NULL)
2905
                        return FALSE;
2906
                      p->next = *head;
2907
                      *head = p;
2908
                      p->section = sreloc;
2909
                      p->count = 0;
2910
                    }
2911
 
2912
                  ++p->count;
2913
                }
2914
            }
2915
 
2916
          break;
2917
 
2918
          /* This relocation describes the C++ object vtable hierarchy.
2919
             Reconstruct it for later use during GC.  */
2920
        case R_68K_GNU_VTINHERIT:
2921
          if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2922
            return FALSE;
2923
          break;
2924
 
2925
          /* This relocation describes which C++ vtable entries are actually
2926
             used.  Record for later use during GC.  */
2927
        case R_68K_GNU_VTENTRY:
2928
          BFD_ASSERT (h != NULL);
2929
          if (h != NULL
2930
              && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2931
            return FALSE;
2932
          break;
2933
 
2934
        default:
2935
          break;
2936
        }
2937
    }
2938
 
2939
  return TRUE;
2940
}
2941
 
2942
/* Return the section that should be marked against GC for a given
2943
   relocation.  */
2944
 
2945
static asection *
2946
elf_m68k_gc_mark_hook (asection *sec,
2947
                       struct bfd_link_info *info,
2948
                       Elf_Internal_Rela *rel,
2949
                       struct elf_link_hash_entry *h,
2950
                       Elf_Internal_Sym *sym)
2951
{
2952
  if (h != NULL)
2953
    switch (ELF32_R_TYPE (rel->r_info))
2954
      {
2955
      case R_68K_GNU_VTINHERIT:
2956
      case R_68K_GNU_VTENTRY:
2957
        return NULL;
2958
      }
2959
 
2960
  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2961
}
2962
 
2963
/* Update the got entry reference counts for the section being removed.  */
2964
 
2965
static bfd_boolean
2966
elf_m68k_gc_sweep_hook (bfd *abfd,
2967
                        struct bfd_link_info *info,
2968
                        asection *sec,
2969
                        const Elf_Internal_Rela *relocs)
2970
{
2971
  Elf_Internal_Shdr *symtab_hdr;
2972
  struct elf_link_hash_entry **sym_hashes;
2973
  const Elf_Internal_Rela *rel, *relend;
2974
  bfd *dynobj;
2975
  struct elf_m68k_got *got;
2976
 
2977
  if (info->relocatable)
2978
    return TRUE;
2979
 
2980
  dynobj = elf_hash_table (info)->dynobj;
2981
  if (dynobj == NULL)
2982
    return TRUE;
2983
 
2984
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2985
  sym_hashes = elf_sym_hashes (abfd);
2986
  got = NULL;
2987
 
2988
  relend = relocs + sec->reloc_count;
2989
  for (rel = relocs; rel < relend; rel++)
2990
    {
2991
      unsigned long r_symndx;
2992
      struct elf_link_hash_entry *h = NULL;
2993
 
2994
      r_symndx = ELF32_R_SYM (rel->r_info);
2995
      if (r_symndx >= symtab_hdr->sh_info)
2996
        {
2997
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2998
          while (h->root.type == bfd_link_hash_indirect
2999
                 || h->root.type == bfd_link_hash_warning)
3000
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
3001
        }
3002
 
3003
      switch (ELF32_R_TYPE (rel->r_info))
3004
        {
3005
        case R_68K_GOT8:
3006
        case R_68K_GOT16:
3007
        case R_68K_GOT32:
3008
          if (h != NULL
3009
              && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3010
            break;
3011
 
3012
          /* FALLTHRU */
3013
        case R_68K_GOT8O:
3014
        case R_68K_GOT16O:
3015
        case R_68K_GOT32O:
3016
          /* Fall through.  */
3017
 
3018
          /* TLS relocations.  */
3019
        case R_68K_TLS_GD8:
3020
        case R_68K_TLS_GD16:
3021
        case R_68K_TLS_GD32:
3022
        case R_68K_TLS_LDM8:
3023
        case R_68K_TLS_LDM16:
3024
        case R_68K_TLS_LDM32:
3025
        case R_68K_TLS_IE8:
3026
        case R_68K_TLS_IE16:
3027
        case R_68K_TLS_IE32:
3028
 
3029
        case R_68K_TLS_TPREL32:
3030
        case R_68K_TLS_DTPREL32:
3031
 
3032
          if (got == NULL)
3033
            {
3034
              got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3035
                                                abfd, MUST_FIND, NULL)->got;
3036
              BFD_ASSERT (got != NULL);
3037
            }
3038
 
3039
          {
3040
            struct elf_m68k_got_entry_key key_;
3041
            struct elf_m68k_got_entry **got_entry_ptr;
3042
            struct elf_m68k_got_entry *got_entry;
3043
 
3044
            elf_m68k_init_got_entry_key (&key_, h, abfd, r_symndx,
3045
                                         ELF32_R_TYPE (rel->r_info));
3046
            got_entry_ptr = elf_m68k_find_got_entry_ptr (got, &key_);
3047
 
3048
            got_entry = *got_entry_ptr;
3049
 
3050
            if (got_entry->u.s1.refcount > 0)
3051
              {
3052
                --got_entry->u.s1.refcount;
3053
 
3054
                if (got_entry->u.s1.refcount == 0)
3055
                  /* We don't need the .got entry any more.  */
3056
                  elf_m68k_remove_got_entry (got, got_entry_ptr);
3057
              }
3058
          }
3059
          break;
3060
 
3061
        case R_68K_PLT8:
3062
        case R_68K_PLT16:
3063
        case R_68K_PLT32:
3064
        case R_68K_PLT8O:
3065
        case R_68K_PLT16O:
3066
        case R_68K_PLT32O:
3067
        case R_68K_PC8:
3068
        case R_68K_PC16:
3069
        case R_68K_PC32:
3070
        case R_68K_8:
3071
        case R_68K_16:
3072
        case R_68K_32:
3073
          if (h != NULL)
3074
            {
3075
              if (h->plt.refcount > 0)
3076
                --h->plt.refcount;
3077
            }
3078
          break;
3079
 
3080
        default:
3081
          break;
3082
        }
3083
    }
3084
 
3085
  return TRUE;
3086
}
3087
 
3088
/* Return the type of PLT associated with OUTPUT_BFD.  */
3089
 
3090
static const struct elf_m68k_plt_info *
3091
elf_m68k_get_plt_info (bfd *output_bfd)
3092
{
3093
  unsigned int features;
3094
 
3095
  features = bfd_m68k_mach_to_features (bfd_get_mach (output_bfd));
3096
  if (features & cpu32)
3097
    return &elf_cpu32_plt_info;
3098
  if (features & mcfisa_b)
3099
    return &elf_isab_plt_info;
3100
  if (features & mcfisa_c)
3101
    return &elf_isac_plt_info;
3102
  return &elf_m68k_plt_info;
3103
}
3104
 
3105
/* This function is called after all the input files have been read,
3106
   and the input sections have been assigned to output sections.
3107
   It's a convenient place to determine the PLT style.  */
3108
 
3109
static bfd_boolean
3110
elf_m68k_always_size_sections (bfd *output_bfd, struct bfd_link_info *info)
3111
{
3112
  /* Bind input BFDs to GOTs and calculate sizes of .got and .rela.got
3113
     sections.  */
3114
  if (!elf_m68k_partition_multi_got (info))
3115
    return FALSE;
3116
 
3117
  elf_m68k_hash_table (info)->plt_info = elf_m68k_get_plt_info (output_bfd);
3118
  return TRUE;
3119
}
3120
 
3121
/* Adjust a symbol defined by a dynamic object and referenced by a
3122
   regular object.  The current definition is in some section of the
3123
   dynamic object, but we're not including those sections.  We have to
3124
   change the definition to something the rest of the link can
3125
   understand.  */
3126
 
3127
static bfd_boolean
3128
elf_m68k_adjust_dynamic_symbol (info, h)
3129
     struct bfd_link_info *info;
3130
     struct elf_link_hash_entry *h;
3131
{
3132
  struct elf_m68k_link_hash_table *htab;
3133
  bfd *dynobj;
3134
  asection *s;
3135
 
3136
  htab = elf_m68k_hash_table (info);
3137
  dynobj = elf_hash_table (info)->dynobj;
3138
 
3139
  /* Make sure we know what is going on here.  */
3140
  BFD_ASSERT (dynobj != NULL
3141
              && (h->needs_plt
3142
                  || h->u.weakdef != NULL
3143
                  || (h->def_dynamic
3144
                      && h->ref_regular
3145
                      && !h->def_regular)));
3146
 
3147
  /* If this is a function, put it in the procedure linkage table.  We
3148
     will fill in the contents of the procedure linkage table later,
3149
     when we know the address of the .got section.  */
3150
  if (h->type == STT_FUNC
3151
      || h->needs_plt)
3152
    {
3153
      if ((h->plt.refcount <= 0
3154
           || SYMBOL_CALLS_LOCAL (info, h)
3155
           || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3156
               && h->root.type == bfd_link_hash_undefweak))
3157
          /* We must always create the plt entry if it was referenced
3158
             by a PLTxxO relocation.  In this case we already recorded
3159
             it as a dynamic symbol.  */
3160
          && h->dynindx == -1)
3161
        {
3162
          /* This case can occur if we saw a PLTxx reloc in an input
3163
             file, but the symbol was never referred to by a dynamic
3164
             object, or if all references were garbage collected.  In
3165
             such a case, we don't actually need to build a procedure
3166
             linkage table, and we can just do a PCxx reloc instead.  */
3167
          h->plt.offset = (bfd_vma) -1;
3168
          h->needs_plt = 0;
3169
          return TRUE;
3170
        }
3171
 
3172
      /* Make sure this symbol is output as a dynamic symbol.  */
3173
      if (h->dynindx == -1
3174
          && !h->forced_local)
3175
        {
3176
          if (! bfd_elf_link_record_dynamic_symbol (info, h))
3177
            return FALSE;
3178
        }
3179
 
3180
      s = bfd_get_section_by_name (dynobj, ".plt");
3181
      BFD_ASSERT (s != NULL);
3182
 
3183
      /* If this is the first .plt entry, make room for the special
3184
         first entry.  */
3185
      if (s->size == 0)
3186
        s->size = htab->plt_info->size;
3187
 
3188
      /* If this symbol is not defined in a regular file, and we are
3189
         not generating a shared library, then set the symbol to this
3190
         location in the .plt.  This is required to make function
3191
         pointers compare as equal between the normal executable and
3192
         the shared library.  */
3193
      if (!info->shared
3194
          && !h->def_regular)
3195
        {
3196
          h->root.u.def.section = s;
3197
          h->root.u.def.value = s->size;
3198
        }
3199
 
3200
      h->plt.offset = s->size;
3201
 
3202
      /* Make room for this entry.  */
3203
      s->size += htab->plt_info->size;
3204
 
3205
      /* We also need to make an entry in the .got.plt section, which
3206
         will be placed in the .got section by the linker script.  */
3207
      s = bfd_get_section_by_name (dynobj, ".got.plt");
3208
      BFD_ASSERT (s != NULL);
3209
      s->size += 4;
3210
 
3211
      /* We also need to make an entry in the .rela.plt section.  */
3212
      s = bfd_get_section_by_name (dynobj, ".rela.plt");
3213
      BFD_ASSERT (s != NULL);
3214
      s->size += sizeof (Elf32_External_Rela);
3215
 
3216
      return TRUE;
3217
    }
3218
 
3219
  /* Reinitialize the plt offset now that it is not used as a reference
3220
     count any more.  */
3221
  h->plt.offset = (bfd_vma) -1;
3222
 
3223
  /* If this is a weak symbol, and there is a real definition, the
3224
     processor independent code will have arranged for us to see the
3225
     real definition first, and we can just use the same value.  */
3226
  if (h->u.weakdef != NULL)
3227
    {
3228
      BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3229
                  || h->u.weakdef->root.type == bfd_link_hash_defweak);
3230
      h->root.u.def.section = h->u.weakdef->root.u.def.section;
3231
      h->root.u.def.value = h->u.weakdef->root.u.def.value;
3232
      return TRUE;
3233
    }
3234
 
3235
  /* This is a reference to a symbol defined by a dynamic object which
3236
     is not a function.  */
3237
 
3238
  /* If we are creating a shared library, we must presume that the
3239
     only references to the symbol are via the global offset table.
3240
     For such cases we need not do anything here; the relocations will
3241
     be handled correctly by relocate_section.  */
3242
  if (info->shared)
3243
    return TRUE;
3244
 
3245
  /* If there are no references to this symbol that do not use the
3246
     GOT, we don't need to generate a copy reloc.  */
3247
  if (!h->non_got_ref)
3248
    return TRUE;
3249
 
3250
  if (h->size == 0)
3251
    {
3252
      (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
3253
                             h->root.root.string);
3254
      return TRUE;
3255
    }
3256
 
3257
  /* We must allocate the symbol in our .dynbss section, which will
3258
     become part of the .bss section of the executable.  There will be
3259
     an entry for this symbol in the .dynsym section.  The dynamic
3260
     object will contain position independent code, so all references
3261
     from the dynamic object to this symbol will go through the global
3262
     offset table.  The dynamic linker will use the .dynsym entry to
3263
     determine the address it must put in the global offset table, so
3264
     both the dynamic object and the regular object will refer to the
3265
     same memory location for the variable.  */
3266
 
3267
  s = bfd_get_section_by_name (dynobj, ".dynbss");
3268
  BFD_ASSERT (s != NULL);
3269
 
3270
  /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
3271
     copy the initial value out of the dynamic object and into the
3272
     runtime process image.  We need to remember the offset into the
3273
     .rela.bss section we are going to use.  */
3274
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3275
    {
3276
      asection *srel;
3277
 
3278
      srel = bfd_get_section_by_name (dynobj, ".rela.bss");
3279
      BFD_ASSERT (srel != NULL);
3280
      srel->size += sizeof (Elf32_External_Rela);
3281
      h->needs_copy = 1;
3282
    }
3283
 
3284
  return _bfd_elf_adjust_dynamic_copy (h, s);
3285
}
3286
 
3287
/* Set the sizes of the dynamic sections.  */
3288
 
3289
static bfd_boolean
3290
elf_m68k_size_dynamic_sections (output_bfd, info)
3291
     bfd *output_bfd ATTRIBUTE_UNUSED;
3292
     struct bfd_link_info *info;
3293
{
3294
  bfd *dynobj;
3295
  asection *s;
3296
  bfd_boolean plt;
3297
  bfd_boolean relocs;
3298
 
3299
  dynobj = elf_hash_table (info)->dynobj;
3300
  BFD_ASSERT (dynobj != NULL);
3301
 
3302
  if (elf_hash_table (info)->dynamic_sections_created)
3303
    {
3304
      /* Set the contents of the .interp section to the interpreter.  */
3305
      if (info->executable)
3306
        {
3307
          s = bfd_get_section_by_name (dynobj, ".interp");
3308
          BFD_ASSERT (s != NULL);
3309
          s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3310
          s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3311
        }
3312
    }
3313
  else
3314
    {
3315
      /* We may have created entries in the .rela.got section.
3316
         However, if we are not creating the dynamic sections, we will
3317
         not actually use these entries.  Reset the size of .rela.got,
3318
         which will cause it to get stripped from the output file
3319
         below.  */
3320
      s = bfd_get_section_by_name (dynobj, ".rela.got");
3321
      if (s != NULL)
3322
        s->size = 0;
3323
    }
3324
 
3325
  /* If this is a -Bsymbolic shared link, then we need to discard all
3326
     PC relative relocs against symbols defined in a regular object.
3327
     For the normal shared case we discard the PC relative relocs
3328
     against symbols that have become local due to visibility changes.
3329
     We allocated space for them in the check_relocs routine, but we
3330
     will not fill them in in the relocate_section routine.  */
3331
  if (info->shared)
3332
    elf_link_hash_traverse (elf_hash_table (info),
3333
                            elf_m68k_discard_copies,
3334
                            (PTR) info);
3335
 
3336
  /* The check_relocs and adjust_dynamic_symbol entry points have
3337
     determined the sizes of the various dynamic sections.  Allocate
3338
     memory for them.  */
3339
  plt = FALSE;
3340
  relocs = FALSE;
3341
  for (s = dynobj->sections; s != NULL; s = s->next)
3342
    {
3343
      const char *name;
3344
 
3345
      if ((s->flags & SEC_LINKER_CREATED) == 0)
3346
        continue;
3347
 
3348
      /* It's OK to base decisions on the section name, because none
3349
         of the dynobj section names depend upon the input files.  */
3350
      name = bfd_get_section_name (dynobj, s);
3351
 
3352
      if (strcmp (name, ".plt") == 0)
3353
        {
3354
          /* Remember whether there is a PLT.  */
3355
          plt = s->size != 0;
3356
        }
3357
      else if (CONST_STRNEQ (name, ".rela"))
3358
        {
3359
          if (s->size != 0)
3360
            {
3361
              relocs = TRUE;
3362
 
3363
              /* We use the reloc_count field as a counter if we need
3364
                 to copy relocs into the output file.  */
3365
              s->reloc_count = 0;
3366
            }
3367
        }
3368
      else if (! CONST_STRNEQ (name, ".got")
3369
               && strcmp (name, ".dynbss") != 0)
3370
        {
3371
          /* It's not one of our sections, so don't allocate space.  */
3372
          continue;
3373
        }
3374
 
3375
      if (s->size == 0)
3376
        {
3377
          /* If we don't need this section, strip it from the
3378
             output file.  This is mostly to handle .rela.bss and
3379
             .rela.plt.  We must create both sections in
3380
             create_dynamic_sections, because they must be created
3381
             before the linker maps input sections to output
3382
             sections.  The linker does that before
3383
             adjust_dynamic_symbol is called, and it is that
3384
             function which decides whether anything needs to go
3385
             into these sections.  */
3386
          s->flags |= SEC_EXCLUDE;
3387
          continue;
3388
        }
3389
 
3390
      if ((s->flags & SEC_HAS_CONTENTS) == 0)
3391
        continue;
3392
 
3393
      /* Allocate memory for the section contents.  */
3394
      /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3395
         Unused entries should be reclaimed before the section's contents
3396
         are written out, but at the moment this does not happen.  Thus in
3397
         order to prevent writing out garbage, we initialise the section's
3398
         contents to zero.  */
3399
      s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3400
      if (s->contents == NULL)
3401
        return FALSE;
3402
    }
3403
 
3404
  if (elf_hash_table (info)->dynamic_sections_created)
3405
    {
3406
      /* Add some entries to the .dynamic section.  We fill in the
3407
         values later, in elf_m68k_finish_dynamic_sections, but we
3408
         must add the entries now so that we get the correct size for
3409
         the .dynamic section.  The DT_DEBUG entry is filled in by the
3410
         dynamic linker and used by the debugger.  */
3411
#define add_dynamic_entry(TAG, VAL) \
3412
  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3413
 
3414
      if (!info->shared)
3415
        {
3416
          if (!add_dynamic_entry (DT_DEBUG, 0))
3417
            return FALSE;
3418
        }
3419
 
3420
      if (plt)
3421
        {
3422
          if (!add_dynamic_entry (DT_PLTGOT, 0)
3423
              || !add_dynamic_entry (DT_PLTRELSZ, 0)
3424
              || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3425
              || !add_dynamic_entry (DT_JMPREL, 0))
3426
            return FALSE;
3427
        }
3428
 
3429
      if (relocs)
3430
        {
3431
          if (!add_dynamic_entry (DT_RELA, 0)
3432
              || !add_dynamic_entry (DT_RELASZ, 0)
3433
              || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3434
            return FALSE;
3435
        }
3436
 
3437
      if ((info->flags & DF_TEXTREL) != 0)
3438
        {
3439
          if (!add_dynamic_entry (DT_TEXTREL, 0))
3440
            return FALSE;
3441
        }
3442
    }
3443
#undef add_dynamic_entry
3444
 
3445
  return TRUE;
3446
}
3447
 
3448
/* This function is called via elf_link_hash_traverse if we are
3449
   creating a shared object.  In the -Bsymbolic case it discards the
3450
   space allocated to copy PC relative relocs against symbols which
3451
   are defined in regular objects.  For the normal shared case, it
3452
   discards space for pc-relative relocs that have become local due to
3453
   symbol visibility changes.  We allocated space for them in the
3454
   check_relocs routine, but we won't fill them in in the
3455
   relocate_section routine.
3456
 
3457
   We also check whether any of the remaining relocations apply
3458
   against a readonly section, and set the DF_TEXTREL flag in this
3459
   case.  */
3460
 
3461
static bfd_boolean
3462
elf_m68k_discard_copies (h, inf)
3463
     struct elf_link_hash_entry *h;
3464
     PTR inf;
3465
{
3466
  struct bfd_link_info *info = (struct bfd_link_info *) inf;
3467
  struct elf_m68k_pcrel_relocs_copied *s;
3468
 
3469
  if (h->root.type == bfd_link_hash_warning)
3470
    h = (struct elf_link_hash_entry *) h->root.u.i.link;
3471
 
3472
  if (!SYMBOL_CALLS_LOCAL (info, h))
3473
    {
3474
      if ((info->flags & DF_TEXTREL) == 0)
3475
        {
3476
          /* Look for relocations against read-only sections.  */
3477
          for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3478
               s != NULL;
3479
               s = s->next)
3480
            if ((s->section->flags & SEC_READONLY) != 0)
3481
              {
3482
                info->flags |= DF_TEXTREL;
3483
                break;
3484
              }
3485
        }
3486
 
3487
      return TRUE;
3488
    }
3489
 
3490
  for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3491
       s != NULL;
3492
       s = s->next)
3493
    s->section->size -= s->count * sizeof (Elf32_External_Rela);
3494
 
3495
  return TRUE;
3496
}
3497
 
3498
 
3499
/* Install relocation RELA.  */
3500
 
3501
static void
3502
elf_m68k_install_rela (bfd *output_bfd,
3503
                       asection *srela,
3504
                       Elf_Internal_Rela *rela)
3505
{
3506
  bfd_byte *loc;
3507
 
3508
  loc = srela->contents;
3509
  loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
3510
  bfd_elf32_swap_reloca_out (output_bfd, rela, loc);
3511
}
3512
 
3513
/* Find the base offsets for thread-local storage in this object,
3514
   for GD/LD and IE/LE respectively.  */
3515
 
3516
#define DTP_OFFSET 0x8000
3517
#define TP_OFFSET  0x7000
3518
 
3519
static bfd_vma
3520
dtpoff_base (struct bfd_link_info *info)
3521
{
3522
  /* If tls_sec is NULL, we should have signalled an error already.  */
3523
  if (elf_hash_table (info)->tls_sec == NULL)
3524
    return 0;
3525
  return elf_hash_table (info)->tls_sec->vma + DTP_OFFSET;
3526
}
3527
 
3528
static bfd_vma
3529
tpoff_base (struct bfd_link_info *info)
3530
{
3531
  /* If tls_sec is NULL, we should have signalled an error already.  */
3532
  if (elf_hash_table (info)->tls_sec == NULL)
3533
    return 0;
3534
  return elf_hash_table (info)->tls_sec->vma + TP_OFFSET;
3535
}
3536
 
3537
/* Output necessary relocation to handle a symbol during static link.
3538
   This function is called from elf_m68k_relocate_section.  */
3539
 
3540
static void
3541
elf_m68k_init_got_entry_static (struct bfd_link_info *info,
3542
                                bfd *output_bfd,
3543
                                enum elf_m68k_reloc_type r_type,
3544
                                asection *sgot,
3545
                                bfd_vma got_entry_offset,
3546
                                bfd_vma relocation)
3547
{
3548
  switch (elf_m68k_reloc_got_type (r_type))
3549
    {
3550
    case R_68K_GOT32O:
3551
      bfd_put_32 (output_bfd, relocation, sgot->contents + got_entry_offset);
3552
      break;
3553
 
3554
    case R_68K_TLS_GD32:
3555
      /* We know the offset within the module,
3556
         put it into the second GOT slot.  */
3557
      bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3558
                  sgot->contents + got_entry_offset + 4);
3559
      /* FALLTHRU */
3560
 
3561
    case R_68K_TLS_LDM32:
3562
      /* Mark it as belonging to module 1, the executable.  */
3563
      bfd_put_32 (output_bfd, 1, sgot->contents + got_entry_offset);
3564
      break;
3565
 
3566
    case R_68K_TLS_IE32:
3567
      bfd_put_32 (output_bfd, relocation - tpoff_base (info),
3568
                  sgot->contents + got_entry_offset);
3569
      break;
3570
 
3571
    default:
3572
      BFD_ASSERT (FALSE);
3573
    }
3574
}
3575
 
3576
/* Output necessary relocation to handle a local symbol
3577
   during dynamic link.
3578
   This function is called either from elf_m68k_relocate_section
3579
   or from elf_m68k_finish_dynamic_symbol.  */
3580
 
3581
static void
3582
elf_m68k_init_got_entry_local_shared (struct bfd_link_info *info,
3583
                                      bfd *output_bfd,
3584
                                      enum elf_m68k_reloc_type r_type,
3585
                                      asection *sgot,
3586
                                      bfd_vma got_entry_offset,
3587
                                      bfd_vma relocation,
3588
                                      asection *srela)
3589
{
3590
  Elf_Internal_Rela outrel;
3591
 
3592
  switch (elf_m68k_reloc_got_type (r_type))
3593
    {
3594
    case R_68K_GOT32O:
3595
      /* Emit RELATIVE relocation to initialize GOT slot
3596
         at run-time.  */
3597
      outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
3598
      outrel.r_addend = relocation;
3599
      break;
3600
 
3601
    case R_68K_TLS_GD32:
3602
      /* We know the offset within the module,
3603
         put it into the second GOT slot.  */
3604
      bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3605
                  sgot->contents + got_entry_offset + 4);
3606
      /* FALLTHRU */
3607
 
3608
    case R_68K_TLS_LDM32:
3609
      /* We don't know the module number,
3610
         create a relocation for it.  */
3611
      outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_DTPMOD32);
3612
      outrel.r_addend = 0;
3613
      break;
3614
 
3615
    case R_68K_TLS_IE32:
3616
      /* Emit TPREL relocation to initialize GOT slot
3617
         at run-time.  */
3618
      outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_TPREL32);
3619
      outrel.r_addend = relocation - elf_hash_table (info)->tls_sec->vma;
3620
      break;
3621
 
3622
    default:
3623
      BFD_ASSERT (FALSE);
3624
    }
3625
 
3626
  /* Offset of the GOT entry.  */
3627
  outrel.r_offset = (sgot->output_section->vma
3628
                     + sgot->output_offset
3629
                     + got_entry_offset);
3630
 
3631
  /* Install one of the above relocations.  */
3632
  elf_m68k_install_rela (output_bfd, srela, &outrel);
3633
 
3634
  bfd_put_32 (output_bfd, outrel.r_addend, sgot->contents + got_entry_offset);
3635
}
3636
 
3637
/* Relocate an M68K ELF section.  */
3638
 
3639
static bfd_boolean
3640
elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
3641
                           contents, relocs, local_syms, local_sections)
3642
     bfd *output_bfd;
3643
     struct bfd_link_info *info;
3644
     bfd *input_bfd;
3645
     asection *input_section;
3646
     bfd_byte *contents;
3647
     Elf_Internal_Rela *relocs;
3648
     Elf_Internal_Sym *local_syms;
3649
     asection **local_sections;
3650
{
3651
  bfd *dynobj;
3652
  Elf_Internal_Shdr *symtab_hdr;
3653
  struct elf_link_hash_entry **sym_hashes;
3654
  asection *sgot;
3655
  asection *splt;
3656
  asection *sreloc;
3657
  asection *srela;
3658
  struct elf_m68k_got *got;
3659
  Elf_Internal_Rela *rel;
3660
  Elf_Internal_Rela *relend;
3661
 
3662
  dynobj = elf_hash_table (info)->dynobj;
3663
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3664
  sym_hashes = elf_sym_hashes (input_bfd);
3665
 
3666
  sgot = NULL;
3667
  splt = NULL;
3668
  sreloc = NULL;
3669
  srela = NULL;
3670
 
3671
  got = NULL;
3672
 
3673
  rel = relocs;
3674
  relend = relocs + input_section->reloc_count;
3675
  for (; rel < relend; rel++)
3676
    {
3677
      int r_type;
3678
      reloc_howto_type *howto;
3679
      unsigned long r_symndx;
3680
      struct elf_link_hash_entry *h;
3681
      Elf_Internal_Sym *sym;
3682
      asection *sec;
3683
      bfd_vma relocation;
3684
      bfd_boolean unresolved_reloc;
3685
      bfd_reloc_status_type r;
3686
 
3687
      r_type = ELF32_R_TYPE (rel->r_info);
3688
      if (r_type < 0 || r_type >= (int) R_68K_max)
3689
        {
3690
          bfd_set_error (bfd_error_bad_value);
3691
          return FALSE;
3692
        }
3693
      howto = howto_table + r_type;
3694
 
3695
      r_symndx = ELF32_R_SYM (rel->r_info);
3696
 
3697
      h = NULL;
3698
      sym = NULL;
3699
      sec = NULL;
3700
      unresolved_reloc = FALSE;
3701
 
3702
      if (r_symndx < symtab_hdr->sh_info)
3703
        {
3704
          sym = local_syms + r_symndx;
3705
          sec = local_sections[r_symndx];
3706
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3707
        }
3708
      else
3709
        {
3710
          bfd_boolean warned;
3711
 
3712
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3713
                                   r_symndx, symtab_hdr, sym_hashes,
3714
                                   h, sec, relocation,
3715
                                   unresolved_reloc, warned);
3716
        }
3717
 
3718
      if (sec != NULL && elf_discarded_section (sec))
3719
        RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3720
                                         rel, relend, howto, contents);
3721
 
3722
      if (info->relocatable)
3723
        continue;
3724
 
3725
      switch (r_type)
3726
        {
3727
        case R_68K_GOT8:
3728
        case R_68K_GOT16:
3729
        case R_68K_GOT32:
3730
          /* Relocation is to the address of the entry for this symbol
3731
             in the global offset table.  */
3732
          if (h != NULL
3733
              && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3734
            {
3735
              if (elf_m68k_hash_table (info)->local_gp_p)
3736
                {
3737
                  bfd_vma sgot_output_offset;
3738
                  bfd_vma got_offset;
3739
 
3740
                  if (sgot == NULL)
3741
                    {
3742
                      sgot = bfd_get_section_by_name (dynobj, ".got");
3743
 
3744
                      if (sgot != NULL)
3745
                        sgot_output_offset = sgot->output_offset;
3746
                      else
3747
                        /* In this case we have a reference to
3748
                           _GLOBAL_OFFSET_TABLE_, but the GOT itself is
3749
                           empty.
3750
                           ??? Issue a warning?  */
3751
                        sgot_output_offset = 0;
3752
                    }
3753
                  else
3754
                    sgot_output_offset = sgot->output_offset;
3755
 
3756
                  if (got == NULL)
3757
                    {
3758
                      struct elf_m68k_bfd2got_entry *bfd2got_entry;
3759
 
3760
                      bfd2got_entry
3761
                        = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3762
                                                      input_bfd, SEARCH, NULL);
3763
 
3764
                      if (bfd2got_entry != NULL)
3765
                        {
3766
                          got = bfd2got_entry->got;
3767
                          BFD_ASSERT (got != NULL);
3768
 
3769
                          got_offset = got->offset;
3770
                        }
3771
                      else
3772
                        /* In this case we have a reference to
3773
                           _GLOBAL_OFFSET_TABLE_, but no other references
3774
                           accessing any GOT entries.
3775
                           ??? Issue a warning?  */
3776
                        got_offset = 0;
3777
                    }
3778
                  else
3779
                    got_offset = got->offset;
3780
 
3781
                  /* Adjust GOT pointer to point to the GOT
3782
                     assigned to input_bfd.  */
3783
                  rel->r_addend += sgot_output_offset + got_offset;
3784
                }
3785
              else
3786
                BFD_ASSERT (got == NULL || got->offset == 0);
3787
 
3788
              break;
3789
            }
3790
          /* Fall through.  */
3791
        case R_68K_GOT8O:
3792
        case R_68K_GOT16O:
3793
        case R_68K_GOT32O:
3794
 
3795
        case R_68K_TLS_LDM32:
3796
        case R_68K_TLS_LDM16:
3797
        case R_68K_TLS_LDM8:
3798
 
3799
        case R_68K_TLS_GD8:
3800
        case R_68K_TLS_GD16:
3801
        case R_68K_TLS_GD32:
3802
 
3803
        case R_68K_TLS_IE8:
3804
        case R_68K_TLS_IE16:
3805
        case R_68K_TLS_IE32:
3806
 
3807
          /* Relocation is the offset of the entry for this symbol in
3808
             the global offset table.  */
3809
 
3810
          {
3811
            struct elf_m68k_got_entry_key key_;
3812
            bfd_vma *off_ptr;
3813
            bfd_vma off;
3814
 
3815
            if (sgot == NULL)
3816
              {
3817
                sgot = bfd_get_section_by_name (dynobj, ".got");
3818
                BFD_ASSERT (sgot != NULL);
3819
              }
3820
 
3821
            if (got == NULL)
3822
              {
3823
                got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3824
                                                  input_bfd, MUST_FIND,
3825
                                                  NULL)->got;
3826
                BFD_ASSERT (got != NULL);
3827
              }
3828
 
3829
            /* Get GOT offset for this symbol.  */
3830
            elf_m68k_init_got_entry_key (&key_, h, input_bfd, r_symndx,
3831
                                         r_type);
3832
            off_ptr = &elf_m68k_get_got_entry (got, &key_, MUST_FIND,
3833
                                               NULL)->u.s2.offset;
3834
            off = *off_ptr;
3835
 
3836
            /* The offset must always be a multiple of 4.  We use
3837
               the least significant bit to record whether we have
3838
               already generated the necessary reloc.  */
3839
            if ((off & 1) != 0)
3840
              off &= ~1;
3841
            else
3842
              {
3843
                if (h != NULL
3844
                    /* @TLSLDM relocations are bounded to the module, in
3845
                       which the symbol is defined -- not to the symbol
3846
                       itself.  */
3847
                    && elf_m68k_reloc_got_type (r_type) != R_68K_TLS_LDM32)
3848
                  {
3849
                    bfd_boolean dyn;
3850
 
3851
                    dyn = elf_hash_table (info)->dynamic_sections_created;
3852
                    if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3853
                        || (info->shared
3854
                            && SYMBOL_REFERENCES_LOCAL (info, h))
3855
                        || (ELF_ST_VISIBILITY (h->other)
3856
                            && h->root.type == bfd_link_hash_undefweak))
3857
                      {
3858
                        /* This is actually a static link, or it is a
3859
                           -Bsymbolic link and the symbol is defined
3860
                           locally, or the symbol was forced to be local
3861
                           because of a version file.  We must initialize
3862
                           this entry in the global offset table.  Since
3863
                           the offset must always be a multiple of 4, we
3864
                           use the least significant bit to record whether
3865
                           we have initialized it already.
3866
 
3867
                           When doing a dynamic link, we create a .rela.got
3868
                           relocation entry to initialize the value.  This
3869
                           is done in the finish_dynamic_symbol routine.  */
3870
 
3871
                        elf_m68k_init_got_entry_static (info,
3872
                                                        output_bfd,
3873
                                                        r_type,
3874
                                                        sgot,
3875
                                                        off,
3876
                                                        relocation);
3877
 
3878
                        *off_ptr |= 1;
3879
                      }
3880
                    else
3881
                      unresolved_reloc = FALSE;
3882
                  }
3883
                else if (info->shared) /* && h == NULL */
3884
                  /* Process local symbol during dynamic link.  */
3885
                  {
3886
                    if (srela == NULL)
3887
                      {
3888
                        srela = bfd_get_section_by_name (dynobj, ".rela.got");
3889
                        BFD_ASSERT (srela != NULL);
3890
                      }
3891
 
3892
                    elf_m68k_init_got_entry_local_shared (info,
3893
                                                          output_bfd,
3894
                                                          r_type,
3895
                                                          sgot,
3896
                                                          off,
3897
                                                          relocation,
3898
                                                          srela);
3899
 
3900
                    *off_ptr |= 1;
3901
                  }
3902
                else /* h == NULL && !info->shared */
3903
                  {
3904
                    elf_m68k_init_got_entry_static (info,
3905
                                                    output_bfd,
3906
                                                    r_type,
3907
                                                    sgot,
3908
                                                    off,
3909
                                                    relocation);
3910
 
3911
                    *off_ptr |= 1;
3912
                  }
3913
              }
3914
 
3915
            /* We don't use elf_m68k_reloc_got_type in the condition below
3916
               because this is the only place where difference between
3917
               R_68K_GOTx and R_68K_GOTxO relocations matters.  */
3918
            if (r_type == R_68K_GOT32O
3919
                || r_type == R_68K_GOT16O
3920
                || r_type == R_68K_GOT8O
3921
                || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_GD32
3922
                || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_LDM32
3923
                || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_IE32)
3924
              {
3925
                /* GOT pointer is adjusted to point to the start/middle
3926
                   of local GOT.  Adjust the offset accordingly.  */
3927
                BFD_ASSERT (elf_m68k_hash_table (info)->use_neg_got_offsets_p
3928
                            || off >= got->offset);
3929
 
3930
                if (elf_m68k_hash_table (info)->local_gp_p)
3931
                  relocation = off - got->offset;
3932
                else
3933
                  {
3934
                    BFD_ASSERT (got->offset == 0);
3935
                    relocation = sgot->output_offset + off;
3936
                  }
3937
 
3938
                /* This relocation does not use the addend.  */
3939
                rel->r_addend = 0;
3940
              }
3941
            else
3942
              relocation = (sgot->output_section->vma + sgot->output_offset
3943
                            + off);
3944
          }
3945
          break;
3946
 
3947
        case R_68K_TLS_LDO32:
3948
        case R_68K_TLS_LDO16:
3949
        case R_68K_TLS_LDO8:
3950
          relocation -= dtpoff_base (info);
3951
          break;
3952
 
3953
        case R_68K_TLS_LE32:
3954
        case R_68K_TLS_LE16:
3955
        case R_68K_TLS_LE8:
3956
          if (info->shared)
3957
            {
3958
              (*_bfd_error_handler)
3959
                (_("%B(%A+0x%lx): R_68K_TLS_LE32 relocation not permitted "
3960
                   "in shared object"),
3961
                 input_bfd, input_section, (long) rel->r_offset, howto->name);
3962
 
3963
              return FALSE;
3964
            }
3965
          else
3966
            relocation -= tpoff_base (info);
3967
 
3968
          break;
3969
 
3970
        case R_68K_PLT8:
3971
        case R_68K_PLT16:
3972
        case R_68K_PLT32:
3973
          /* Relocation is to the entry for this symbol in the
3974
             procedure linkage table.  */
3975
 
3976
          /* Resolve a PLTxx reloc against a local symbol directly,
3977
             without using the procedure linkage table.  */
3978
          if (h == NULL)
3979
            break;
3980
 
3981
          if (h->plt.offset == (bfd_vma) -1
3982
              || !elf_hash_table (info)->dynamic_sections_created)
3983
            {
3984
              /* We didn't make a PLT entry for this symbol.  This
3985
                 happens when statically linking PIC code, or when
3986
                 using -Bsymbolic.  */
3987
              break;
3988
            }
3989
 
3990
          if (splt == NULL)
3991
            {
3992
              splt = bfd_get_section_by_name (dynobj, ".plt");
3993
              BFD_ASSERT (splt != NULL);
3994
            }
3995
 
3996
          relocation = (splt->output_section->vma
3997
                        + splt->output_offset
3998
                        + h->plt.offset);
3999
          unresolved_reloc = FALSE;
4000
          break;
4001
 
4002
        case R_68K_PLT8O:
4003
        case R_68K_PLT16O:
4004
        case R_68K_PLT32O:
4005
          /* Relocation is the offset of the entry for this symbol in
4006
             the procedure linkage table.  */
4007
          BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1);
4008
 
4009
          if (splt == NULL)
4010
            {
4011
              splt = bfd_get_section_by_name (dynobj, ".plt");
4012
              BFD_ASSERT (splt != NULL);
4013
            }
4014
 
4015
          relocation = h->plt.offset;
4016
          unresolved_reloc = FALSE;
4017
 
4018
          /* This relocation does not use the addend.  */
4019
          rel->r_addend = 0;
4020
 
4021
          break;
4022
 
4023
        case R_68K_8:
4024
        case R_68K_16:
4025
        case R_68K_32:
4026
        case R_68K_PC8:
4027
        case R_68K_PC16:
4028
        case R_68K_PC32:
4029
          if (info->shared
4030
              && r_symndx != STN_UNDEF
4031
              && (input_section->flags & SEC_ALLOC) != 0
4032
              && (h == NULL
4033
                  || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4034
                  || h->root.type != bfd_link_hash_undefweak)
4035
              && ((r_type != R_68K_PC8
4036
                   && r_type != R_68K_PC16
4037
                   && r_type != R_68K_PC32)
4038
                  || !SYMBOL_CALLS_LOCAL (info, h)))
4039
            {
4040
              Elf_Internal_Rela outrel;
4041
              bfd_byte *loc;
4042
              bfd_boolean skip, relocate;
4043
 
4044
              /* When generating a shared object, these relocations
4045
                 are copied into the output file to be resolved at run
4046
                 time.  */
4047
 
4048
              skip = FALSE;
4049
              relocate = FALSE;
4050
 
4051
              outrel.r_offset =
4052
                _bfd_elf_section_offset (output_bfd, info, input_section,
4053
                                         rel->r_offset);
4054
              if (outrel.r_offset == (bfd_vma) -1)
4055
                skip = TRUE;
4056
              else if (outrel.r_offset == (bfd_vma) -2)
4057
                skip = TRUE, relocate = TRUE;
4058
              outrel.r_offset += (input_section->output_section->vma
4059
                                  + input_section->output_offset);
4060
 
4061
              if (skip)
4062
                memset (&outrel, 0, sizeof outrel);
4063
              else if (h != NULL
4064
                       && h->dynindx != -1
4065
                       && (r_type == R_68K_PC8
4066
                           || r_type == R_68K_PC16
4067
                           || r_type == R_68K_PC32
4068
                           || !info->shared
4069
                           || !info->symbolic
4070
                           || !h->def_regular))
4071
                {
4072
                  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4073
                  outrel.r_addend = rel->r_addend;
4074
                }
4075
              else
4076
                {
4077
                  /* This symbol is local, or marked to become local.  */
4078
                  outrel.r_addend = relocation + rel->r_addend;
4079
 
4080
                  if (r_type == R_68K_32)
4081
                    {
4082
                      relocate = TRUE;
4083
                      outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
4084
                    }
4085
                  else
4086
                    {
4087
                      long indx;
4088
 
4089
                      if (bfd_is_abs_section (sec))
4090
                        indx = 0;
4091
                      else if (sec == NULL || sec->owner == NULL)
4092
                        {
4093
                          bfd_set_error (bfd_error_bad_value);
4094
                          return FALSE;
4095
                        }
4096
                      else
4097
                        {
4098
                          asection *osec;
4099
 
4100
                          /* We are turning this relocation into one
4101
                             against a section symbol.  It would be
4102
                             proper to subtract the symbol's value,
4103
                             osec->vma, from the emitted reloc addend,
4104
                             but ld.so expects buggy relocs.  */
4105
                          osec = sec->output_section;
4106
                          indx = elf_section_data (osec)->dynindx;
4107
                          if (indx == 0)
4108
                            {
4109
                              struct elf_link_hash_table *htab;
4110
                              htab = elf_hash_table (info);
4111
                              osec = htab->text_index_section;
4112
                              indx = elf_section_data (osec)->dynindx;
4113
                            }
4114
                          BFD_ASSERT (indx != 0);
4115
                        }
4116
 
4117
                      outrel.r_info = ELF32_R_INFO (indx, r_type);
4118
                    }
4119
                }
4120
 
4121
              sreloc = elf_section_data (input_section)->sreloc;
4122
              if (sreloc == NULL)
4123
                abort ();
4124
 
4125
              loc = sreloc->contents;
4126
              loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4127
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4128
 
4129
              /* This reloc will be computed at runtime, so there's no
4130
                 need to do anything now, except for R_68K_32
4131
                 relocations that have been turned into
4132
                 R_68K_RELATIVE.  */
4133
              if (!relocate)
4134
                continue;
4135
            }
4136
 
4137
          break;
4138
 
4139
        case R_68K_GNU_VTINHERIT:
4140
        case R_68K_GNU_VTENTRY:
4141
          /* These are no-ops in the end.  */
4142
          continue;
4143
 
4144
        default:
4145
          break;
4146
        }
4147
 
4148
      /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4149
         because such sections are not SEC_ALLOC and thus ld.so will
4150
         not process them.  */
4151
      if (unresolved_reloc
4152
          && !((input_section->flags & SEC_DEBUGGING) != 0
4153
               && h->def_dynamic))
4154
        {
4155
          (*_bfd_error_handler)
4156
            (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4157
             input_bfd,
4158
             input_section,
4159
             (long) rel->r_offset,
4160
             howto->name,
4161
             h->root.root.string);
4162
          return FALSE;
4163
        }
4164
 
4165
      if (r_symndx != STN_UNDEF
4166
          && r_type != R_68K_NONE
4167
          && (h == NULL
4168
              || h->root.type == bfd_link_hash_defined
4169
              || h->root.type == bfd_link_hash_defweak))
4170
        {
4171
          char sym_type;
4172
 
4173
          sym_type = (sym != NULL) ? ELF32_ST_TYPE (sym->st_info) : h->type;
4174
 
4175
          if (elf_m68k_reloc_tls_p (r_type) != (sym_type == STT_TLS))
4176
            {
4177
              const char *name;
4178
 
4179
              if (h != NULL)
4180
                name = h->root.root.string;
4181
              else
4182
                {
4183
                  name = (bfd_elf_string_from_elf_section
4184
                          (input_bfd, symtab_hdr->sh_link, sym->st_name));
4185
                  if (name == NULL || *name == '\0')
4186
                    name = bfd_section_name (input_bfd, sec);
4187
                }
4188
 
4189
              (*_bfd_error_handler)
4190
                ((sym_type == STT_TLS
4191
                  ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4192
                  : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4193
                 input_bfd,
4194
                 input_section,
4195
                 (long) rel->r_offset,
4196
                 howto->name,
4197
                 name);
4198
            }
4199
        }
4200
 
4201
      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4202
                                    contents, rel->r_offset,
4203
                                    relocation, rel->r_addend);
4204
 
4205
      if (r != bfd_reloc_ok)
4206
        {
4207
          const char *name;
4208
 
4209
          if (h != NULL)
4210
            name = h->root.root.string;
4211
          else
4212
            {
4213
              name = bfd_elf_string_from_elf_section (input_bfd,
4214
                                                      symtab_hdr->sh_link,
4215
                                                      sym->st_name);
4216
              if (name == NULL)
4217
                return FALSE;
4218
              if (*name == '\0')
4219
                name = bfd_section_name (input_bfd, sec);
4220
            }
4221
 
4222
          if (r == bfd_reloc_overflow)
4223
            {
4224
              if (!(info->callbacks->reloc_overflow
4225
                    (info, (h ? &h->root : NULL), name, howto->name,
4226
                     (bfd_vma) 0, input_bfd, input_section,
4227
                     rel->r_offset)))
4228
                return FALSE;
4229
            }
4230
          else
4231
            {
4232
              (*_bfd_error_handler)
4233
                (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4234
                 input_bfd, input_section,
4235
                 (long) rel->r_offset, name, (int) r);
4236
              return FALSE;
4237
            }
4238
        }
4239
    }
4240
 
4241
  return TRUE;
4242
}
4243
 
4244
/* Install an M_68K_PC32 relocation against VALUE at offset OFFSET
4245
   into section SEC.  */
4246
 
4247
static void
4248
elf_m68k_install_pc32 (asection *sec, bfd_vma offset, bfd_vma value)
4249
{
4250
  /* Make VALUE PC-relative.  */
4251
  value -= sec->output_section->vma + offset;
4252
 
4253
  /* Apply any in-place addend.  */
4254
  value += bfd_get_32 (sec->owner, sec->contents + offset);
4255
 
4256
  bfd_put_32 (sec->owner, value, sec->contents + offset);
4257
}
4258
 
4259
/* Finish up dynamic symbol handling.  We set the contents of various
4260
   dynamic sections here.  */
4261
 
4262
static bfd_boolean
4263
elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
4264
     bfd *output_bfd;
4265
     struct bfd_link_info *info;
4266
     struct elf_link_hash_entry *h;
4267
     Elf_Internal_Sym *sym;
4268
{
4269
  bfd *dynobj;
4270
 
4271
  dynobj = elf_hash_table (info)->dynobj;
4272
 
4273
  if (h->plt.offset != (bfd_vma) -1)
4274
    {
4275
      const struct elf_m68k_plt_info *plt_info;
4276
      asection *splt;
4277
      asection *sgot;
4278
      asection *srela;
4279
      bfd_vma plt_index;
4280
      bfd_vma got_offset;
4281
      Elf_Internal_Rela rela;
4282
      bfd_byte *loc;
4283
 
4284
      /* This symbol has an entry in the procedure linkage table.  Set
4285
         it up.  */
4286
 
4287
      BFD_ASSERT (h->dynindx != -1);
4288
 
4289
      plt_info = elf_m68k_hash_table (info)->plt_info;
4290
      splt = bfd_get_section_by_name (dynobj, ".plt");
4291
      sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4292
      srela = bfd_get_section_by_name (dynobj, ".rela.plt");
4293
      BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
4294
 
4295
      /* Get the index in the procedure linkage table which
4296
         corresponds to this symbol.  This is the index of this symbol
4297
         in all the symbols for which we are making plt entries.  The
4298
         first entry in the procedure linkage table is reserved.  */
4299
      plt_index = (h->plt.offset / plt_info->size) - 1;
4300
 
4301
      /* Get the offset into the .got table of the entry that
4302
         corresponds to this function.  Each .got entry is 4 bytes.
4303
         The first three are reserved.  */
4304
      got_offset = (plt_index + 3) * 4;
4305
 
4306
      memcpy (splt->contents + h->plt.offset,
4307
              plt_info->symbol_entry,
4308
              plt_info->size);
4309
 
4310
      elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.got,
4311
                             (sgot->output_section->vma
4312
                              + sgot->output_offset
4313
                              + got_offset));
4314
 
4315
      bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4316
                  splt->contents
4317
                  + h->plt.offset
4318
                  + plt_info->symbol_resolve_entry + 2);
4319
 
4320
      elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.plt,
4321
                             splt->output_section->vma);
4322
 
4323
      /* Fill in the entry in the global offset table.  */
4324
      bfd_put_32 (output_bfd,
4325
                  (splt->output_section->vma
4326
                   + splt->output_offset
4327
                   + h->plt.offset
4328
                   + plt_info->symbol_resolve_entry),
4329
                  sgot->contents + got_offset);
4330
 
4331
      /* Fill in the entry in the .rela.plt section.  */
4332
      rela.r_offset = (sgot->output_section->vma
4333
                       + sgot->output_offset
4334
                       + got_offset);
4335
      rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT);
4336
      rela.r_addend = 0;
4337
      loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
4338
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4339
 
4340
      if (!h->def_regular)
4341
        {
4342
          /* Mark the symbol as undefined, rather than as defined in
4343
             the .plt section.  Leave the value alone.  */
4344
          sym->st_shndx = SHN_UNDEF;
4345
        }
4346
    }
4347
 
4348
  if (elf_m68k_hash_entry (h)->glist != NULL)
4349
    {
4350
      asection *sgot;
4351
      asection *srela;
4352
      struct elf_m68k_got_entry *got_entry;
4353
 
4354
      /* This symbol has an entry in the global offset table.  Set it
4355
         up.  */
4356
 
4357
      sgot = bfd_get_section_by_name (dynobj, ".got");
4358
      srela = bfd_get_section_by_name (dynobj, ".rela.got");
4359
      BFD_ASSERT (sgot != NULL && srela != NULL);
4360
 
4361
      got_entry = elf_m68k_hash_entry (h)->glist;
4362
 
4363
      while (got_entry != NULL)
4364
        {
4365
          enum elf_m68k_reloc_type r_type;
4366
          bfd_vma got_entry_offset;
4367
 
4368
          r_type = got_entry->key_.type;
4369
          got_entry_offset = got_entry->u.s2.offset &~ (bfd_vma) 1;
4370
 
4371
          /* If this is a -Bsymbolic link, and the symbol is defined
4372
             locally, we just want to emit a RELATIVE reloc.  Likewise if
4373
             the symbol was forced to be local because of a version file.
4374
             The entry in the global offset table already have been
4375
             initialized in the relocate_section function.  */
4376
          if (info->shared
4377
              && SYMBOL_REFERENCES_LOCAL (info, h))
4378
            {
4379
              bfd_vma relocation;
4380
 
4381
              relocation = bfd_get_signed_32 (output_bfd,
4382
                                              (sgot->contents
4383
                                               + got_entry_offset));
4384
 
4385
              /* Undo TP bias.  */
4386
              switch (elf_m68k_reloc_got_type (r_type))
4387
                {
4388
                case R_68K_GOT32O:
4389
                case R_68K_TLS_LDM32:
4390
                  break;
4391
 
4392
                case R_68K_TLS_GD32:
4393
                  /* The value for this relocation is actually put in
4394
                     the second GOT slot.  */
4395
                  relocation = bfd_get_signed_32 (output_bfd,
4396
                                                  (sgot->contents
4397
                                                   + got_entry_offset + 4));
4398
                  relocation += dtpoff_base (info);
4399
                  break;
4400
 
4401
                case R_68K_TLS_IE32:
4402
                  relocation += tpoff_base (info);
4403
                  break;
4404
 
4405
                default:
4406
                  BFD_ASSERT (FALSE);
4407
                }
4408
 
4409
              elf_m68k_init_got_entry_local_shared (info,
4410
                                                    output_bfd,
4411
                                                    r_type,
4412
                                                    sgot,
4413
                                                    got_entry_offset,
4414
                                                    relocation,
4415
                                                    srela);
4416
            }
4417
          else
4418
            {
4419
              Elf_Internal_Rela rela;
4420
 
4421
              /* Put zeros to GOT slots that will be initialized
4422
                 at run-time.  */
4423
              {
4424
                bfd_vma n_slots;
4425
 
4426
                n_slots = elf_m68k_reloc_got_n_slots (got_entry->key_.type);
4427
                while (n_slots--)
4428
                  bfd_put_32 (output_bfd, (bfd_vma) 0,
4429
                              (sgot->contents + got_entry_offset
4430
                               + 4 * n_slots));
4431
              }
4432
 
4433
              rela.r_addend = 0;
4434
              rela.r_offset = (sgot->output_section->vma
4435
                               + sgot->output_offset
4436
                               + got_entry_offset);
4437
 
4438
              switch (elf_m68k_reloc_got_type (r_type))
4439
                {
4440
                case R_68K_GOT32O:
4441
                  rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT);
4442
                  elf_m68k_install_rela (output_bfd, srela, &rela);
4443
                  break;
4444
 
4445
                case R_68K_TLS_GD32:
4446
                  rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPMOD32);
4447
                  elf_m68k_install_rela (output_bfd, srela, &rela);
4448
 
4449
                  rela.r_offset += 4;
4450
                  rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPREL32);
4451
                  elf_m68k_install_rela (output_bfd, srela, &rela);
4452
                  break;
4453
 
4454
                case R_68K_TLS_IE32:
4455
                  rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_TPREL32);
4456
                  elf_m68k_install_rela (output_bfd, srela, &rela);
4457
                  break;
4458
 
4459
                default:
4460
                  BFD_ASSERT (FALSE);
4461
                  break;
4462
                }
4463
            }
4464
 
4465
          got_entry = got_entry->u.s2.next;
4466
        }
4467
    }
4468
 
4469
  if (h->needs_copy)
4470
    {
4471
      asection *s;
4472
      Elf_Internal_Rela rela;
4473
      bfd_byte *loc;
4474
 
4475
      /* This symbol needs a copy reloc.  Set it up.  */
4476
 
4477
      BFD_ASSERT (h->dynindx != -1
4478
                  && (h->root.type == bfd_link_hash_defined
4479
                      || h->root.type == bfd_link_hash_defweak));
4480
 
4481
      s = bfd_get_section_by_name (h->root.u.def.section->owner,
4482
                                   ".rela.bss");
4483
      BFD_ASSERT (s != NULL);
4484
 
4485
      rela.r_offset = (h->root.u.def.value
4486
                       + h->root.u.def.section->output_section->vma
4487
                       + h->root.u.def.section->output_offset);
4488
      rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY);
4489
      rela.r_addend = 0;
4490
      loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4491
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4492
    }
4493
 
4494
  /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
4495
  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4496
      || h == elf_hash_table (info)->hgot)
4497
    sym->st_shndx = SHN_ABS;
4498
 
4499
  return TRUE;
4500
}
4501
 
4502
/* Finish up the dynamic sections.  */
4503
 
4504
static bfd_boolean
4505
elf_m68k_finish_dynamic_sections (output_bfd, info)
4506
     bfd *output_bfd;
4507
     struct bfd_link_info *info;
4508
{
4509
  bfd *dynobj;
4510
  asection *sgot;
4511
  asection *sdyn;
4512
 
4513
  dynobj = elf_hash_table (info)->dynobj;
4514
 
4515
  sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4516
  BFD_ASSERT (sgot != NULL);
4517
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4518
 
4519
  if (elf_hash_table (info)->dynamic_sections_created)
4520
    {
4521
      asection *splt;
4522
      Elf32_External_Dyn *dyncon, *dynconend;
4523
 
4524
      splt = bfd_get_section_by_name (dynobj, ".plt");
4525
      BFD_ASSERT (splt != NULL && sdyn != NULL);
4526
 
4527
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
4528
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4529
      for (; dyncon < dynconend; dyncon++)
4530
        {
4531
          Elf_Internal_Dyn dyn;
4532
          const char *name;
4533
          asection *s;
4534
 
4535
          bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4536
 
4537
          switch (dyn.d_tag)
4538
            {
4539
            default:
4540
              break;
4541
 
4542
            case DT_PLTGOT:
4543
              name = ".got";
4544
              goto get_vma;
4545
            case DT_JMPREL:
4546
              name = ".rela.plt";
4547
            get_vma:
4548
              s = bfd_get_section_by_name (output_bfd, name);
4549
              BFD_ASSERT (s != NULL);
4550
              dyn.d_un.d_ptr = s->vma;
4551
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4552
              break;
4553
 
4554
            case DT_PLTRELSZ:
4555
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4556
              BFD_ASSERT (s != NULL);
4557
              dyn.d_un.d_val = s->size;
4558
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4559
              break;
4560
 
4561
            case DT_RELASZ:
4562
              /* The procedure linkage table relocs (DT_JMPREL) should
4563
                 not be included in the overall relocs (DT_RELA).
4564
                 Therefore, we override the DT_RELASZ entry here to
4565
                 make it not include the JMPREL relocs.  Since the
4566
                 linker script arranges for .rela.plt to follow all
4567
                 other relocation sections, we don't have to worry
4568
                 about changing the DT_RELA entry.  */
4569
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4570
              if (s != NULL)
4571
                dyn.d_un.d_val -= s->size;
4572
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4573
              break;
4574
            }
4575
        }
4576
 
4577
      /* Fill in the first entry in the procedure linkage table.  */
4578
      if (splt->size > 0)
4579
        {
4580
          const struct elf_m68k_plt_info *plt_info;
4581
 
4582
          plt_info = elf_m68k_hash_table (info)->plt_info;
4583
          memcpy (splt->contents, plt_info->plt0_entry, plt_info->size);
4584
 
4585
          elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got4,
4586
                                 (sgot->output_section->vma
4587
                                  + sgot->output_offset
4588
                                  + 4));
4589
 
4590
          elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got8,
4591
                                 (sgot->output_section->vma
4592
                                  + sgot->output_offset
4593
                                  + 8));
4594
 
4595
          elf_section_data (splt->output_section)->this_hdr.sh_entsize
4596
            = plt_info->size;
4597
        }
4598
    }
4599
 
4600
  /* Fill in the first three entries in the global offset table.  */
4601
  if (sgot->size > 0)
4602
    {
4603
      if (sdyn == NULL)
4604
        bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4605
      else
4606
        bfd_put_32 (output_bfd,
4607
                    sdyn->output_section->vma + sdyn->output_offset,
4608
                    sgot->contents);
4609
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4610
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4611
    }
4612
 
4613
  elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4614
 
4615
  return TRUE;
4616
}
4617
 
4618
/* Given a .data section and a .emreloc in-memory section, store
4619
   relocation information into the .emreloc section which can be
4620
   used at runtime to relocate the section.  This is called by the
4621
   linker when the --embedded-relocs switch is used.  This is called
4622
   after the add_symbols entry point has been called for all the
4623
   objects, and before the final_link entry point is called.  */
4624
 
4625
bfd_boolean
4626
bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg)
4627
     bfd *abfd;
4628
     struct bfd_link_info *info;
4629
     asection *datasec;
4630
     asection *relsec;
4631
     char **errmsg;
4632
{
4633
  Elf_Internal_Shdr *symtab_hdr;
4634
  Elf_Internal_Sym *isymbuf = NULL;
4635
  Elf_Internal_Rela *internal_relocs = NULL;
4636
  Elf_Internal_Rela *irel, *irelend;
4637
  bfd_byte *p;
4638
  bfd_size_type amt;
4639
 
4640
  BFD_ASSERT (! info->relocatable);
4641
 
4642
  *errmsg = NULL;
4643
 
4644
  if (datasec->reloc_count == 0)
4645
    return TRUE;
4646
 
4647
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4648
 
4649
  /* Get a copy of the native relocations.  */
4650
  internal_relocs = (_bfd_elf_link_read_relocs
4651
                     (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
4652
                      info->keep_memory));
4653
  if (internal_relocs == NULL)
4654
    goto error_return;
4655
 
4656
  amt = (bfd_size_type) datasec->reloc_count * 12;
4657
  relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
4658
  if (relsec->contents == NULL)
4659
    goto error_return;
4660
 
4661
  p = relsec->contents;
4662
 
4663
  irelend = internal_relocs + datasec->reloc_count;
4664
  for (irel = internal_relocs; irel < irelend; irel++, p += 12)
4665
    {
4666
      asection *targetsec;
4667
 
4668
      /* We are going to write a four byte longword into the runtime
4669
       reloc section.  The longword will be the address in the data
4670
       section which must be relocated.  It is followed by the name
4671
       of the target section NUL-padded or truncated to 8
4672
       characters.  */
4673
 
4674
      /* We can only relocate absolute longword relocs at run time.  */
4675
      if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32)
4676
        {
4677
          *errmsg = _("unsupported reloc type");
4678
          bfd_set_error (bfd_error_bad_value);
4679
          goto error_return;
4680
        }
4681
 
4682
      /* Get the target section referred to by the reloc.  */
4683
      if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4684
        {
4685
          /* A local symbol.  */
4686
          Elf_Internal_Sym *isym;
4687
 
4688
          /* Read this BFD's local symbols if we haven't done so already.  */
4689
          if (isymbuf == NULL)
4690
            {
4691
              isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4692
              if (isymbuf == NULL)
4693
                isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4694
                                                symtab_hdr->sh_info, 0,
4695
                                                NULL, NULL, NULL);
4696
              if (isymbuf == NULL)
4697
                goto error_return;
4698
            }
4699
 
4700
          isym = isymbuf + ELF32_R_SYM (irel->r_info);
4701
          targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4702
        }
4703
      else
4704
        {
4705
          unsigned long indx;
4706
          struct elf_link_hash_entry *h;
4707
 
4708
          /* An external symbol.  */
4709
          indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4710
          h = elf_sym_hashes (abfd)[indx];
4711
          BFD_ASSERT (h != NULL);
4712
          if (h->root.type == bfd_link_hash_defined
4713
              || h->root.type == bfd_link_hash_defweak)
4714
            targetsec = h->root.u.def.section;
4715
          else
4716
            targetsec = NULL;
4717
        }
4718
 
4719
      bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
4720
      memset (p + 4, 0, 8);
4721
      if (targetsec != NULL)
4722
        strncpy ((char *) p + 4, targetsec->output_section->name, 8);
4723
    }
4724
 
4725
  if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
4726
    free (isymbuf);
4727
  if (internal_relocs != NULL
4728
      && elf_section_data (datasec)->relocs != internal_relocs)
4729
    free (internal_relocs);
4730
  return TRUE;
4731
 
4732
error_return:
4733
  if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
4734
    free (isymbuf);
4735
  if (internal_relocs != NULL
4736
      && elf_section_data (datasec)->relocs != internal_relocs)
4737
    free (internal_relocs);
4738
  return FALSE;
4739
}
4740
 
4741
/* Set target options.  */
4742
 
4743
void
4744
bfd_elf_m68k_set_target_options (struct bfd_link_info *info, int got_handling)
4745
{
4746
  struct elf_m68k_link_hash_table *htab;
4747
  bfd_boolean use_neg_got_offsets_p;
4748
  bfd_boolean allow_multigot_p;
4749
  bfd_boolean local_gp_p;
4750
 
4751
  switch (got_handling)
4752
    {
4753
    case 0:
4754
      /* --got=single.  */
4755
      local_gp_p = FALSE;
4756
      use_neg_got_offsets_p = FALSE;
4757
      allow_multigot_p = FALSE;
4758
      break;
4759
 
4760
    case 1:
4761
      /* --got=negative.  */
4762
      local_gp_p = TRUE;
4763
      use_neg_got_offsets_p = TRUE;
4764
      allow_multigot_p = FALSE;
4765
      break;
4766
 
4767
    case 2:
4768
      /* --got=multigot.  */
4769
      local_gp_p = TRUE;
4770
      use_neg_got_offsets_p = TRUE;
4771
      allow_multigot_p = TRUE;
4772
      break;
4773
 
4774
    default:
4775
      BFD_ASSERT (FALSE);
4776
      return;
4777
    }
4778
 
4779
  htab = elf_m68k_hash_table (info);
4780
  if (htab != NULL)
4781
    {
4782
      htab->local_gp_p = local_gp_p;
4783
      htab->use_neg_got_offsets_p = use_neg_got_offsets_p;
4784
      htab->allow_multigot_p = allow_multigot_p;
4785
    }
4786
}
4787
 
4788
static enum elf_reloc_type_class
4789
elf32_m68k_reloc_type_class (rela)
4790
     const Elf_Internal_Rela *rela;
4791
{
4792
  switch ((int) ELF32_R_TYPE (rela->r_info))
4793
    {
4794
    case R_68K_RELATIVE:
4795
      return reloc_class_relative;
4796
    case R_68K_JMP_SLOT:
4797
      return reloc_class_plt;
4798
    case R_68K_COPY:
4799
      return reloc_class_copy;
4800
    default:
4801
      return reloc_class_normal;
4802
    }
4803
}
4804
 
4805
/* Return address for Ith PLT stub in section PLT, for relocation REL
4806
   or (bfd_vma) -1 if it should not be included.  */
4807
 
4808
static bfd_vma
4809
elf_m68k_plt_sym_val (bfd_vma i, const asection *plt,
4810
                      const arelent *rel ATTRIBUTE_UNUSED)
4811
{
4812
  return plt->vma + (i + 1) * elf_m68k_get_plt_info (plt->owner)->size;
4813
}
4814
 
4815
#define TARGET_BIG_SYM                  bfd_elf32_m68k_vec
4816
#define TARGET_BIG_NAME                 "elf32-m68k"
4817
#define ELF_MACHINE_CODE                EM_68K
4818
#define ELF_MAXPAGESIZE                 0x2000
4819
#define elf_backend_create_dynamic_sections \
4820
                                        _bfd_elf_create_dynamic_sections
4821
#define bfd_elf32_bfd_link_hash_table_create \
4822
                                        elf_m68k_link_hash_table_create
4823
/* ??? Should it be this macro or bfd_elfNN_bfd_link_hash_table_create?  */
4824
#define bfd_elf32_bfd_link_hash_table_free \
4825
                                        elf_m68k_link_hash_table_free
4826
#define bfd_elf32_bfd_final_link        bfd_elf_final_link
4827
 
4828
#define elf_backend_check_relocs        elf_m68k_check_relocs
4829
#define elf_backend_always_size_sections \
4830
                                        elf_m68k_always_size_sections
4831
#define elf_backend_adjust_dynamic_symbol \
4832
                                        elf_m68k_adjust_dynamic_symbol
4833
#define elf_backend_size_dynamic_sections \
4834
                                        elf_m68k_size_dynamic_sections
4835
#define elf_backend_final_write_processing      elf_m68k_final_write_processing
4836
#define elf_backend_init_index_section  _bfd_elf_init_1_index_section
4837
#define elf_backend_relocate_section    elf_m68k_relocate_section
4838
#define elf_backend_finish_dynamic_symbol \
4839
                                        elf_m68k_finish_dynamic_symbol
4840
#define elf_backend_finish_dynamic_sections \
4841
                                        elf_m68k_finish_dynamic_sections
4842
#define elf_backend_gc_mark_hook        elf_m68k_gc_mark_hook
4843
#define elf_backend_gc_sweep_hook       elf_m68k_gc_sweep_hook
4844
#define elf_backend_copy_indirect_symbol elf_m68k_copy_indirect_symbol
4845
#define bfd_elf32_bfd_merge_private_bfd_data \
4846
                                        elf32_m68k_merge_private_bfd_data
4847
#define bfd_elf32_bfd_set_private_flags \
4848
                                        elf32_m68k_set_private_flags
4849
#define bfd_elf32_bfd_print_private_bfd_data \
4850
                                        elf32_m68k_print_private_bfd_data
4851
#define elf_backend_reloc_type_class    elf32_m68k_reloc_type_class
4852
#define elf_backend_plt_sym_val         elf_m68k_plt_sym_val
4853
#define elf_backend_object_p            elf32_m68k_object_p
4854
 
4855
#define elf_backend_can_gc_sections 1
4856
#define elf_backend_can_refcount 1
4857
#define elf_backend_want_got_plt 1
4858
#define elf_backend_plt_readonly 1
4859
#define elf_backend_want_plt_sym 0
4860
#define elf_backend_got_header_size     12
4861
#define elf_backend_rela_normal         1
4862
 
4863
#include "elf32-target.h"

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