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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [elf32-s390.c] - Blame information for rev 157

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Line No. Rev Author Line
1 24 jeremybenn
/* IBM S/390-specific support for 32-bit ELF
2
   Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3
   Free Software Foundation, Inc.
4
   Contributed by Carl B. Pedersen and Martin Schwidefsky.
5
 
6
   This file is part of BFD, the Binary File Descriptor library.
7
 
8
   This program is free software; you can redistribute it and/or modify
9
   it under the terms of the GNU General Public License as published by
10
   the Free Software Foundation; either version 3 of the License, or
11
   (at your option) any later version.
12
 
13
   This program is distributed in the hope that it will be useful,
14
   but WITHOUT ANY WARRANTY; without even the implied warranty of
15
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
   GNU General Public License for more details.
17
 
18
   You should have received a copy of the GNU General Public License
19
   along with this program; if not, write to the Free Software
20
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21
   02110-1301, USA.  */
22
 
23
#include "sysdep.h"
24
#include "bfd.h"
25
#include "bfdlink.h"
26
#include "libbfd.h"
27
#include "elf-bfd.h"
28
 
29
static reloc_howto_type *elf_s390_reloc_type_lookup
30
  PARAMS ((bfd *, bfd_reloc_code_real_type));
31
static void elf_s390_info_to_howto
32
  PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33
static bfd_boolean elf_s390_is_local_label_name
34
  PARAMS ((bfd *, const char *));
35
static struct bfd_hash_entry *link_hash_newfunc
36
  PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37
static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38
  PARAMS ((bfd *));
39
static bfd_boolean create_got_section
40
  PARAMS((bfd *, struct bfd_link_info *));
41
static bfd_boolean elf_s390_create_dynamic_sections
42
  PARAMS((bfd *, struct bfd_link_info *));
43
static void elf_s390_copy_indirect_symbol
44
  PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
45
           struct elf_link_hash_entry *));
46
static bfd_boolean elf_s390_check_relocs
47
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
48
           const Elf_Internal_Rela *));
49
struct elf_s390_link_hash_entry;
50
static void elf_s390_adjust_gotplt
51
  PARAMS ((struct elf_s390_link_hash_entry *));
52
static bfd_boolean elf_s390_adjust_dynamic_symbol
53
  PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
54
static bfd_boolean allocate_dynrelocs
55
  PARAMS ((struct elf_link_hash_entry *, PTR));
56
static bfd_boolean readonly_dynrelocs
57
  PARAMS ((struct elf_link_hash_entry *, PTR));
58
static bfd_boolean elf_s390_size_dynamic_sections
59
  PARAMS ((bfd *, struct bfd_link_info *));
60
static bfd_boolean elf_s390_relocate_section
61
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62
           Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
63
static bfd_boolean elf_s390_finish_dynamic_symbol
64
  PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
65
           Elf_Internal_Sym *));
66
static enum elf_reloc_type_class elf_s390_reloc_type_class
67
  PARAMS ((const Elf_Internal_Rela *));
68
static bfd_boolean elf_s390_finish_dynamic_sections
69
  PARAMS ((bfd *, struct bfd_link_info *));
70
static bfd_boolean elf_s390_object_p
71
  PARAMS ((bfd *));
72
static bfd_boolean elf_s390_grok_prstatus
73
  PARAMS ((bfd *, Elf_Internal_Note *));
74
static int elf_s390_tls_transition
75
  PARAMS ((struct bfd_link_info *, int, int));
76
static bfd_reloc_status_type s390_tls_reloc
77
  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
78
static bfd_vma dtpoff_base
79
  PARAMS ((struct bfd_link_info *));
80
static bfd_vma tpoff
81
  PARAMS ((struct bfd_link_info *, bfd_vma));
82
static void invalid_tls_insn
83
  PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
84
static bfd_reloc_status_type s390_elf_ldisp_reloc
85
  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
86
 
87
#include "elf/s390.h"
88
 
89
/* The relocation "howto" table.  */
90
 
91
static reloc_howto_type elf_howto_table[] =
92
{
93
  HOWTO (R_390_NONE,            /* type */
94
         0,                      /* rightshift */
95
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
96
         0,                      /* bitsize */
97
         FALSE,                 /* pc_relative */
98
         0,                      /* bitpos */
99
         complain_overflow_dont, /* complain_on_overflow */
100
         bfd_elf_generic_reloc, /* special_function */
101
         "R_390_NONE",          /* name */
102
         FALSE,                 /* partial_inplace */
103
         0,                      /* src_mask */
104
         0,                      /* dst_mask */
105
         FALSE),                /* pcrel_offset */
106
 
107
  HOWTO(R_390_8,         0, 0,  8, FALSE, 0, complain_overflow_bitfield,
108
        bfd_elf_generic_reloc, "R_390_8",        FALSE, 0,0x000000ff, FALSE),
109
  HOWTO(R_390_12,        0, 1, 12, FALSE, 0, complain_overflow_dont,
110
        bfd_elf_generic_reloc, "R_390_12",       FALSE, 0,0x00000fff, FALSE),
111
  HOWTO(R_390_16,        0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112
        bfd_elf_generic_reloc, "R_390_16",       FALSE, 0,0x0000ffff, FALSE),
113
  HOWTO(R_390_32,        0, 2, 32, FALSE, 0, complain_overflow_bitfield,
114
        bfd_elf_generic_reloc, "R_390_32",       FALSE, 0,0xffffffff, FALSE),
115
  HOWTO(R_390_PC32,      0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
116
        bfd_elf_generic_reloc, "R_390_PC32",     FALSE, 0,0xffffffff, TRUE),
117
  HOWTO(R_390_GOT12,     0, 1, 12, FALSE, 0, complain_overflow_bitfield,
118
        bfd_elf_generic_reloc, "R_390_GOT12",    FALSE, 0,0x00000fff, FALSE),
119
  HOWTO(R_390_GOT32,     0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120
        bfd_elf_generic_reloc, "R_390_GOT32",    FALSE, 0,0xffffffff, FALSE),
121
  HOWTO(R_390_PLT32,     0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
122
        bfd_elf_generic_reloc, "R_390_PLT32",    FALSE, 0,0xffffffff, TRUE),
123
  HOWTO(R_390_COPY,      0, 2, 32, FALSE, 0, complain_overflow_bitfield,
124
        bfd_elf_generic_reloc, "R_390_COPY",     FALSE, 0,0xffffffff, FALSE),
125
  HOWTO(R_390_GLOB_DAT,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126
        bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
127
  HOWTO(R_390_JMP_SLOT,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128
        bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
129
  HOWTO(R_390_RELATIVE,  0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
130
        bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
131
  HOWTO(R_390_GOTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132
        bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
133
  HOWTO(R_390_GOTPC,     0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
134
        bfd_elf_generic_reloc, "R_390_GOTPC",    FALSE, 0,0xffffffff, TRUE),
135
  HOWTO(R_390_GOT16,     0, 1, 16, FALSE, 0, complain_overflow_bitfield,
136
        bfd_elf_generic_reloc, "R_390_GOT16",    FALSE, 0,0x0000ffff, FALSE),
137
  HOWTO(R_390_PC16,      0, 1, 16,  TRUE, 0, complain_overflow_bitfield,
138
        bfd_elf_generic_reloc, "R_390_PC16",     FALSE, 0,0x0000ffff, TRUE),
139
  HOWTO(R_390_PC16DBL,   1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
140
        bfd_elf_generic_reloc, "R_390_PC16DBL",  FALSE, 0,0x0000ffff, TRUE),
141
  HOWTO(R_390_PLT16DBL,  1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
142
        bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
143
  HOWTO(R_390_PC32DBL,   1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
144
        bfd_elf_generic_reloc, "R_390_PC32DBL",  FALSE, 0,0xffffffff, TRUE),
145
  HOWTO(R_390_PLT32DBL,  1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
146
        bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
147
  HOWTO(R_390_GOTPCDBL,  1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
148
        bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
149
  EMPTY_HOWTO (R_390_64),       /* Empty entry for R_390_64.  */
150
  EMPTY_HOWTO (R_390_PC64),     /* Empty entry for R_390_PC64.  */
151
  EMPTY_HOWTO (R_390_GOT64),    /* Empty entry for R_390_GOT64.  */
152
  EMPTY_HOWTO (R_390_PLT64),    /* Empty entry for R_390_PLT64.  */
153
  HOWTO(R_390_GOTENT,    1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
154
        bfd_elf_generic_reloc, "R_390_GOTENT",   FALSE, 0,0xffffffff, TRUE),
155
  HOWTO(R_390_GOTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
156
        bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
157
  EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64.  */
158
  HOWTO(R_390_GOTPLT12,  0, 1, 12, FALSE, 0, complain_overflow_dont,
159
        bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
160
  HOWTO(R_390_GOTPLT16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
161
        bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
162
  HOWTO(R_390_GOTPLT32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
163
        bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
164
  EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64.  */
165
  HOWTO(R_390_GOTPLTENT, 1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
166
        bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
167
  HOWTO(R_390_PLTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
168
        bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
169
  HOWTO(R_390_PLTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
170
        bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
171
  EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64.  */
172
  HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
173
        s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
174
  HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
175
        s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
176
  HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
177
        s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
178
  HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
179
        bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
180
  EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64.  */
181
  HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
182
        bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
183
  HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
184
        bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
185
  EMPTY_HOWTO (R_390_TLS_GOTIE64),      /* Empty entry for R_390_TLS_GOTIE64.  */
186
  HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
187
        bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
188
  EMPTY_HOWTO (R_390_TLS_LDM64),        /* Empty entry for R_390_TLS_LDM64.  */
189
  HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
190
        bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
191
  EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64.  */
192
  HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
193
        bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
194
  HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
195
        bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
196
  EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64.  */
197
  HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
198
        bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
199
  EMPTY_HOWTO (R_390_TLS_LDO64),        /* Empty entry for R_390_TLS_LDO64.  */
200
  HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
201
        bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
202
  HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
203
        bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
204
  HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
205
        bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
206
  HOWTO(R_390_20,        0, 2, 20, FALSE, 8, complain_overflow_dont,
207
        s390_elf_ldisp_reloc, "R_390_20",      FALSE, 0,0x0fffff00, FALSE),
208
  HOWTO(R_390_GOT20,     0, 2, 20, FALSE, 8, complain_overflow_dont,
209
        s390_elf_ldisp_reloc, "R_390_GOT20",   FALSE, 0,0x0fffff00, FALSE),
210
  HOWTO(R_390_GOTPLT20,  0, 2, 20, FALSE, 8, complain_overflow_dont,
211
        s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
212
  HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
213
        s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
214
};
215
 
216
/* GNU extension to record C++ vtable hierarchy.  */
217
static reloc_howto_type elf32_s390_vtinherit_howto =
218
  HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
219
static reloc_howto_type elf32_s390_vtentry_howto =
220
  HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
221
 
222
static reloc_howto_type *
223
elf_s390_reloc_type_lookup (abfd, code)
224
     bfd *abfd ATTRIBUTE_UNUSED;
225
     bfd_reloc_code_real_type code;
226
{
227
  switch (code)
228
    {
229
    case BFD_RELOC_NONE:
230
      return &elf_howto_table[(int) R_390_NONE];
231
    case BFD_RELOC_8:
232
      return &elf_howto_table[(int) R_390_8];
233
    case BFD_RELOC_390_12:
234
      return &elf_howto_table[(int) R_390_12];
235
    case BFD_RELOC_16:
236
      return &elf_howto_table[(int) R_390_16];
237
    case BFD_RELOC_32:
238
      return &elf_howto_table[(int) R_390_32];
239
    case BFD_RELOC_CTOR:
240
      return &elf_howto_table[(int) R_390_32];
241
    case BFD_RELOC_32_PCREL:
242
      return &elf_howto_table[(int) R_390_PC32];
243
    case BFD_RELOC_390_GOT12:
244
      return &elf_howto_table[(int) R_390_GOT12];
245
    case BFD_RELOC_32_GOT_PCREL:
246
      return &elf_howto_table[(int) R_390_GOT32];
247
    case BFD_RELOC_390_PLT32:
248
      return &elf_howto_table[(int) R_390_PLT32];
249
    case BFD_RELOC_390_COPY:
250
      return &elf_howto_table[(int) R_390_COPY];
251
    case BFD_RELOC_390_GLOB_DAT:
252
      return &elf_howto_table[(int) R_390_GLOB_DAT];
253
    case BFD_RELOC_390_JMP_SLOT:
254
      return &elf_howto_table[(int) R_390_JMP_SLOT];
255
    case BFD_RELOC_390_RELATIVE:
256
      return &elf_howto_table[(int) R_390_RELATIVE];
257
    case BFD_RELOC_32_GOTOFF:
258
      return &elf_howto_table[(int) R_390_GOTOFF32];
259
    case BFD_RELOC_390_GOTPC:
260
      return &elf_howto_table[(int) R_390_GOTPC];
261
    case BFD_RELOC_390_GOT16:
262
      return &elf_howto_table[(int) R_390_GOT16];
263
    case BFD_RELOC_16_PCREL:
264
      return &elf_howto_table[(int) R_390_PC16];
265
    case BFD_RELOC_390_PC16DBL:
266
      return &elf_howto_table[(int) R_390_PC16DBL];
267
    case BFD_RELOC_390_PLT16DBL:
268
      return &elf_howto_table[(int) R_390_PLT16DBL];
269
    case BFD_RELOC_390_PC32DBL:
270
      return &elf_howto_table[(int) R_390_PC32DBL];
271
    case BFD_RELOC_390_PLT32DBL:
272
      return &elf_howto_table[(int) R_390_PLT32DBL];
273
    case BFD_RELOC_390_GOTPCDBL:
274
      return &elf_howto_table[(int) R_390_GOTPCDBL];
275
    case BFD_RELOC_390_GOTENT:
276
      return &elf_howto_table[(int) R_390_GOTENT];
277
    case BFD_RELOC_16_GOTOFF:
278
      return &elf_howto_table[(int) R_390_GOTOFF16];
279
    case BFD_RELOC_390_GOTPLT12:
280
      return &elf_howto_table[(int) R_390_GOTPLT12];
281
    case BFD_RELOC_390_GOTPLT16:
282
      return &elf_howto_table[(int) R_390_GOTPLT16];
283
    case BFD_RELOC_390_GOTPLT32:
284
      return &elf_howto_table[(int) R_390_GOTPLT32];
285
    case BFD_RELOC_390_GOTPLTENT:
286
      return &elf_howto_table[(int) R_390_GOTPLTENT];
287
    case BFD_RELOC_390_PLTOFF16:
288
      return &elf_howto_table[(int) R_390_PLTOFF16];
289
    case BFD_RELOC_390_PLTOFF32:
290
      return &elf_howto_table[(int) R_390_PLTOFF32];
291
    case BFD_RELOC_390_TLS_LOAD:
292
      return &elf_howto_table[(int) R_390_TLS_LOAD];
293
    case BFD_RELOC_390_TLS_GDCALL:
294
      return &elf_howto_table[(int) R_390_TLS_GDCALL];
295
    case BFD_RELOC_390_TLS_LDCALL:
296
      return &elf_howto_table[(int) R_390_TLS_LDCALL];
297
    case BFD_RELOC_390_TLS_GD32:
298
      return &elf_howto_table[(int) R_390_TLS_GD32];
299
    case BFD_RELOC_390_TLS_GOTIE12:
300
      return &elf_howto_table[(int) R_390_TLS_GOTIE12];
301
    case BFD_RELOC_390_TLS_GOTIE32:
302
      return &elf_howto_table[(int) R_390_TLS_GOTIE32];
303
    case BFD_RELOC_390_TLS_LDM32:
304
      return &elf_howto_table[(int) R_390_TLS_LDM32];
305
    case BFD_RELOC_390_TLS_IE32:
306
      return &elf_howto_table[(int) R_390_TLS_IE32];
307
    case BFD_RELOC_390_TLS_IEENT:
308
      return &elf_howto_table[(int) R_390_TLS_IEENT];
309
    case BFD_RELOC_390_TLS_LE32:
310
      return &elf_howto_table[(int) R_390_TLS_LE32];
311
    case BFD_RELOC_390_TLS_LDO32:
312
      return &elf_howto_table[(int) R_390_TLS_LDO32];
313
    case BFD_RELOC_390_TLS_DTPMOD:
314
      return &elf_howto_table[(int) R_390_TLS_DTPMOD];
315
    case BFD_RELOC_390_TLS_DTPOFF:
316
      return &elf_howto_table[(int) R_390_TLS_DTPOFF];
317
    case BFD_RELOC_390_TLS_TPOFF:
318
      return &elf_howto_table[(int) R_390_TLS_TPOFF];
319
    case BFD_RELOC_390_20:
320
      return &elf_howto_table[(int) R_390_20];
321
    case BFD_RELOC_390_GOT20:
322
      return &elf_howto_table[(int) R_390_GOT20];
323
    case BFD_RELOC_390_GOTPLT20:
324
      return &elf_howto_table[(int) R_390_GOTPLT20];
325
    case BFD_RELOC_390_TLS_GOTIE20:
326
      return &elf_howto_table[(int) R_390_TLS_GOTIE20];
327
    case BFD_RELOC_VTABLE_INHERIT:
328
      return &elf32_s390_vtinherit_howto;
329
    case BFD_RELOC_VTABLE_ENTRY:
330
      return &elf32_s390_vtentry_howto;
331
    default:
332
      break;
333
    }
334
  return 0;
335
}
336
 
337
static reloc_howto_type *
338
elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
339
                            const char *r_name)
340
{
341
  unsigned int i;
342
 
343
  for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
344
    if (elf_howto_table[i].name != NULL
345
        && strcasecmp (elf_howto_table[i].name, r_name) == 0)
346
      return &elf_howto_table[i];
347
 
348
  if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
349
    return &elf32_s390_vtinherit_howto;
350
  if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
351
    return &elf32_s390_vtentry_howto;
352
 
353
  return NULL;
354
}
355
 
356
/* We need to use ELF32_R_TYPE so we have our own copy of this function,
357
   and elf32-s390.c has its own copy.  */
358
 
359
static void
360
elf_s390_info_to_howto (abfd, cache_ptr, dst)
361
     bfd *abfd ATTRIBUTE_UNUSED;
362
     arelent *cache_ptr;
363
     Elf_Internal_Rela *dst;
364
{
365
  unsigned int r_type = ELF32_R_TYPE(dst->r_info);
366
  switch (r_type)
367
    {
368
    case R_390_GNU_VTINHERIT:
369
      cache_ptr->howto = &elf32_s390_vtinherit_howto;
370
      break;
371
 
372
    case R_390_GNU_VTENTRY:
373
      cache_ptr->howto = &elf32_s390_vtentry_howto;
374
      break;
375
 
376
    default:
377
      if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
378
        {
379
          (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
380
                                 abfd, (int) r_type);
381
          r_type = R_390_NONE;
382
        }
383
      cache_ptr->howto = &elf_howto_table[r_type];
384
    }
385
}
386
 
387
/* A relocation function which doesn't do anything.  */
388
static bfd_reloc_status_type
389
s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
390
                output_bfd, error_message)
391
     bfd *abfd ATTRIBUTE_UNUSED;
392
     arelent *reloc_entry;
393
     asymbol *symbol ATTRIBUTE_UNUSED;
394
     PTR data ATTRIBUTE_UNUSED;
395
     asection *input_section;
396
     bfd *output_bfd;
397
     char **error_message ATTRIBUTE_UNUSED;
398
{
399
  if (output_bfd)
400
    reloc_entry->address += input_section->output_offset;
401
  return bfd_reloc_ok;
402
}
403
 
404
/* Handle the large displacement relocs.  */
405
static bfd_reloc_status_type
406
s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
407
                      output_bfd, error_message)
408
     bfd *abfd ATTRIBUTE_UNUSED;
409
     arelent *reloc_entry;
410
     asymbol *symbol;
411
     PTR data ATTRIBUTE_UNUSED;
412
     asection *input_section;
413
     bfd *output_bfd;
414
     char **error_message ATTRIBUTE_UNUSED;
415
{
416
  reloc_howto_type *howto = reloc_entry->howto;
417
  bfd_vma relocation;
418
  bfd_vma insn;
419
 
420
  if (output_bfd != (bfd *) NULL
421
      && (symbol->flags & BSF_SECTION_SYM) == 0
422
      && (! howto->partial_inplace
423
          || reloc_entry->addend == 0))
424
    {
425
      reloc_entry->address += input_section->output_offset;
426
      return bfd_reloc_ok;
427
    }
428
 
429
  if (output_bfd != NULL)
430
    return bfd_reloc_continue;
431
 
432
  if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
433
    return bfd_reloc_outofrange;
434
 
435
  relocation = (symbol->value
436
                + symbol->section->output_section->vma
437
                + symbol->section->output_offset);
438
  relocation += reloc_entry->addend;
439
  if (howto->pc_relative)
440
    {
441
      relocation -= (input_section->output_section->vma
442
                     + input_section->output_offset);
443
      relocation -= reloc_entry->address;
444
    }
445
 
446
  insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
447
  insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
448
  bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
449
 
450
  if ((bfd_signed_vma) relocation < - 0x80000
451
      || (bfd_signed_vma) relocation > 0x7ffff)
452
    return bfd_reloc_overflow;
453
  else
454
    return bfd_reloc_ok;
455
}
456
 
457
static bfd_boolean
458
elf_s390_is_local_label_name (abfd, name)
459
     bfd *abfd;
460
     const char *name;
461
{
462
  if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
463
    return TRUE;
464
 
465
  return _bfd_elf_is_local_label_name (abfd, name);
466
}
467
 
468
/* Functions for the 390 ELF linker.  */
469
 
470
/* The name of the dynamic interpreter.  This is put in the .interp
471
   section.  */
472
 
473
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
474
 
475
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
476
   copying dynamic variables from a shared lib into an app's dynbss
477
   section, and instead use a dynamic relocation to point into the
478
   shared lib.  */
479
#define ELIMINATE_COPY_RELOCS 1
480
 
481
/* The size in bytes of the first entry in the procedure linkage table.  */
482
#define PLT_FIRST_ENTRY_SIZE 32
483
/* The size in bytes of an entry in the procedure linkage table.  */
484
#define PLT_ENTRY_SIZE 32
485
 
486
#define GOT_ENTRY_SIZE 4
487
 
488
/* The first three entries in a procedure linkage table are reserved,
489
   and the initial contents are unimportant (we zero them out).
490
   Subsequent entries look like this.  See the SVR4 ABI 386
491
   supplement to see how this works.  */
492
 
493
/* For the s390, simple addr offset can only be 0 - 4096.
494
   To use the full 2 GB address space, several instructions
495
   are needed to load an address in a register and execute
496
   a branch( or just saving the address)
497
 
498
   Furthermore, only r 0 and 1 are free to use!!!  */
499
 
500
/* The first 3 words in the GOT are then reserved.
501
   Word 0 is the address of the dynamic table.
502
   Word 1 is a pointer to a structure describing the object
503
   Word 2 is used to point to the loader entry address.
504
 
505
   The code for position independent PLT entries looks like this:
506
 
507
   r12 holds addr of the current GOT at entry to the PLT
508
 
509
   The GOT holds the address in the PLT to be executed.
510
   The loader then gets:
511
   24(15) =  Pointer to the structure describing the object.
512
   28(15) =  Offset in symbol table
513
 
514
   The loader  must  then find the module where the function is
515
   and insert the address in the GOT.
516
 
517
  Note: 390 can only address +- 64 K relative.
518
        We check if offset > 65536, then make a relative branch -64xxx
519
        back to a previous defined branch
520
 
521
PLT1: BASR 1,0         # 2 bytes
522
      L    1,22(1)     # 4 bytes  Load offset in GOT in r 1
523
      L    1,(1,12)    # 4 bytes  Load address from GOT in r1
524
      BCR  15,1        # 2 bytes  Jump to address
525
RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
526
      L    1,14(1)     # 4 bytes  Load offset in symol table in r1
527
      BRC  15,-x       # 4 bytes  Jump to start of PLT
528
      .word 0          # 2 bytes filler
529
      .long ?          # 4 bytes  offset in GOT
530
      .long ?          # 4 bytes  offset into symbol table
531
 
532
  This was the general case. There are two additional, optimizes PLT
533
  definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
534
  First the one for GOT offsets < 4096:
535
 
536
PLT1: L    1,<offset>(12) # 4 bytes  Load address from GOT in R1
537
      BCR  15,1           # 2 bytes  Jump to address
538
      .word 0,0,0         # 6 bytes  filler
539
RET1: BASR 1,0            # 2 bytes  Return from GOT 1st time
540
      L    1,14(1)        # 4 bytes  Load offset in symbol table in r1
541
      BRC  15,-x          # 4 bytes  Jump to start of PLT
542
      .word 0,0,0         # 6 bytes  filler
543
      .long ?             # 4 bytes  offset into symbol table
544
 
545
  Second the one for GOT offsets < 32768:
546
 
547
PLT1: LHI  1,<offset>     # 4 bytes  Load offset in GOT to r1
548
      L    1,(1,12)       # 4 bytes  Load address from GOT to r1
549
      BCR  15,1           # 2 bytes  Jump to address
550
      .word 0             # 2 bytes  filler
551
RET1: BASR 1,0            # 2 bytes  Return from GOT 1st time
552
      L    1,14(1)        # 4 bytes  Load offset in symbol table in r1
553
      BRC  15,-x          # 4 bytes  Jump to start of PLT
554
      .word 0,0,0         # 6 bytes  filler
555
      .long ?             # 4 bytes  offset into symbol table
556
 
557
Total = 32 bytes per PLT entry
558
 
559
   The code for static build PLT entries looks like this:
560
 
561
PLT1: BASR 1,0         # 2 bytes
562
      L    1,22(1)     # 4 bytes  Load address of GOT entry
563
      L    1,0(0,1)    # 4 bytes  Load address from GOT in r1
564
      BCR  15,1        # 2 bytes  Jump to address
565
RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
566
      L    1,14(1)     # 4 bytes  Load offset in symbol table in r1
567
      BRC  15,-x       # 4 bytes  Jump to start of PLT
568
      .word 0          # 2 bytes  filler
569
      .long ?          # 4 bytes  address of GOT entry
570
      .long ?          # 4 bytes  offset into symbol table  */
571
 
572
#define PLT_PIC_ENTRY_WORD0 0x0d105810
573
#define PLT_PIC_ENTRY_WORD1 0x10165811
574
#define PLT_PIC_ENTRY_WORD2 0xc00007f1
575
#define PLT_PIC_ENTRY_WORD3 0x0d105810
576
#define PLT_PIC_ENTRY_WORD4 0x100ea7f4
577
 
578
#define PLT_PIC12_ENTRY_WORD0 0x5810c000
579
#define PLT_PIC12_ENTRY_WORD1 0x07f10000
580
#define PLT_PIC12_ENTRY_WORD2 0x00000000
581
#define PLT_PIC12_ENTRY_WORD3 0x0d105810
582
#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
583
 
584
#define PLT_PIC16_ENTRY_WORD0 0xa7180000
585
#define PLT_PIC16_ENTRY_WORD1 0x5811c000
586
#define PLT_PIC16_ENTRY_WORD2 0x07f10000
587
#define PLT_PIC16_ENTRY_WORD3 0x0d105810
588
#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
589
 
590
#define PLT_ENTRY_WORD0     0x0d105810
591
#define PLT_ENTRY_WORD1     0x10165810
592
#define PLT_ENTRY_WORD2     0x100007f1
593
#define PLT_ENTRY_WORD3     0x0d105810
594
#define PLT_ENTRY_WORD4     0x100ea7f4
595
 
596
/* The first PLT entry pushes the offset into the symbol table
597
   from R1 onto the stack at 8(15) and the loader object info
598
   at 12(15), loads the loader address in R1 and jumps to it.  */
599
 
600
/* The first entry in the PLT for PIC code:
601
 
602
PLT0:
603
   ST   1,28(15)  # R1 has offset into symbol table
604
   L    1,4(12)   # Get loader ino(object struct address)
605
   ST   1,24(15)  # Store address
606
   L    1,8(12)   # Entry address of loader in R1
607
   BR   1         # Jump to loader
608
 
609
   The first entry in the PLT for static code:
610
 
611
PLT0:
612
   ST   1,28(15)      # R1 has offset into symbol table
613
   BASR 1,0
614
   L    1,18(0,1)     # Get address of GOT
615
   MVC  24(4,15),4(1) # Move loader ino to stack
616
   L    1,8(1)        # Get address of loader
617
   BR   1             # Jump to loader
618
   .word 0            # filler
619
   .long got          # address of GOT  */
620
 
621
#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
622
#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
623
#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
624
#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
625
#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
626
 
627
#define PLT_FIRST_ENTRY_WORD0     0x5010f01c
628
#define PLT_FIRST_ENTRY_WORD1     0x0d105810
629
#define PLT_FIRST_ENTRY_WORD2     0x1012D203
630
#define PLT_FIRST_ENTRY_WORD3     0xf0181004
631
#define PLT_FIRST_ENTRY_WORD4     0x58101008
632
#define PLT_FIRST_ENTRY_WORD5     0x07f10000
633
 
634
/* The s390 linker needs to keep track of the number of relocs that it
635
   decides to copy as dynamic relocs in check_relocs for each symbol.
636
   This is so that it can later discard them if they are found to be
637
   unnecessary.  We store the information in a field extending the
638
   regular ELF linker hash table.  */
639
 
640
struct elf_s390_dyn_relocs
641
{
642
  struct elf_s390_dyn_relocs *next;
643
 
644
  /* The input section of the reloc.  */
645
  asection *sec;
646
 
647
  /* Total number of relocs copied for the input section.  */
648
  bfd_size_type count;
649
 
650
  /* Number of pc-relative relocs copied for the input section.  */
651
  bfd_size_type pc_count;
652
};
653
 
654
/* s390 ELF linker hash entry.  */
655
 
656
struct elf_s390_link_hash_entry
657
{
658
  struct elf_link_hash_entry elf;
659
 
660
  /* Track dynamic relocs copied for this symbol.  */
661
  struct elf_s390_dyn_relocs *dyn_relocs;
662
 
663
  /* Number of GOTPLT references for a function.  */
664
  bfd_signed_vma gotplt_refcount;
665
 
666
#define GOT_UNKNOWN     0
667
#define GOT_NORMAL      1
668
#define GOT_TLS_GD      2
669
#define GOT_TLS_IE      3
670
#define GOT_TLS_IE_NLT  4
671
  unsigned char tls_type;
672
};
673
 
674
#define elf_s390_hash_entry(ent) \
675
  ((struct elf_s390_link_hash_entry *)(ent))
676
 
677
/* NOTE: Keep this structure in sync with
678
   the one declared in elf64-s390.c.  */
679
struct elf_s390_obj_tdata
680
{
681
  struct elf_obj_tdata root;
682
 
683
  /* TLS type for each local got entry.  */
684
  char *local_got_tls_type;
685
};
686
 
687
#define elf_s390_tdata(abfd) \
688
  ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
689
 
690
#define elf_s390_local_got_tls_type(abfd) \
691
  (elf_s390_tdata (abfd)->local_got_tls_type)
692
 
693
#define is_s390_elf(bfd) \
694
  (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
695
   && elf_tdata (bfd) != NULL \
696
   && elf_object_id (bfd) == S390_ELF_TDATA)
697
 
698
static bfd_boolean
699
elf_s390_mkobject (bfd *abfd)
700
{
701
  return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
702
                                  S390_ELF_TDATA);
703
}
704
 
705
static bfd_boolean
706
elf_s390_object_p (abfd)
707
     bfd *abfd;
708
{
709
  /* Set the right machine number for an s390 elf32 file.  */
710
  return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
711
}
712
 
713
/* s390 ELF linker hash table.  */
714
 
715
struct elf_s390_link_hash_table
716
{
717
  struct elf_link_hash_table elf;
718
 
719
  /* Short-cuts to get to dynamic linker sections.  */
720
  asection *sgot;
721
  asection *sgotplt;
722
  asection *srelgot;
723
  asection *splt;
724
  asection *srelplt;
725
  asection *sdynbss;
726
  asection *srelbss;
727
 
728
  union {
729
    bfd_signed_vma refcount;
730
    bfd_vma offset;
731
  } tls_ldm_got;
732
 
733
  /* Small local sym to section mapping cache.  */
734
  struct sym_sec_cache sym_sec;
735
};
736
 
737
/* Get the s390 ELF linker hash table from a link_info structure.  */
738
 
739
#define elf_s390_hash_table(p) \
740
  ((struct elf_s390_link_hash_table *) ((p)->hash))
741
 
742
/* Create an entry in an s390 ELF linker hash table.  */
743
 
744
static struct bfd_hash_entry *
745
link_hash_newfunc (entry, table, string)
746
     struct bfd_hash_entry *entry;
747
     struct bfd_hash_table *table;
748
     const char *string;
749
{
750
  /* Allocate the structure if it has not already been allocated by a
751
     subclass.  */
752
  if (entry == NULL)
753
    {
754
      entry = bfd_hash_allocate (table,
755
                                 sizeof (struct elf_s390_link_hash_entry));
756
      if (entry == NULL)
757
        return entry;
758
    }
759
 
760
  /* Call the allocation method of the superclass.  */
761
  entry = _bfd_elf_link_hash_newfunc (entry, table, string);
762
  if (entry != NULL)
763
    {
764
      struct elf_s390_link_hash_entry *eh;
765
 
766
      eh = (struct elf_s390_link_hash_entry *) entry;
767
      eh->dyn_relocs = NULL;
768
      eh->gotplt_refcount = 0;
769
      eh->tls_type = GOT_UNKNOWN;
770
    }
771
 
772
  return entry;
773
}
774
 
775
/* Create an s390 ELF linker hash table.  */
776
 
777
static struct bfd_link_hash_table *
778
elf_s390_link_hash_table_create (abfd)
779
     bfd *abfd;
780
{
781
  struct elf_s390_link_hash_table *ret;
782
  bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
783
 
784
  ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
785
  if (ret == NULL)
786
    return NULL;
787
 
788
  if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
789
                                      sizeof (struct elf_s390_link_hash_entry)))
790
    {
791
      free (ret);
792
      return NULL;
793
    }
794
 
795
  ret->sgot = NULL;
796
  ret->sgotplt = NULL;
797
  ret->srelgot = NULL;
798
  ret->splt = NULL;
799
  ret->srelplt = NULL;
800
  ret->sdynbss = NULL;
801
  ret->srelbss = NULL;
802
  ret->tls_ldm_got.refcount = 0;
803
  ret->sym_sec.abfd = NULL;
804
 
805
  return &ret->elf.root;
806
}
807
 
808
/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
809
   shortcuts to them in our hash table.  */
810
 
811
static bfd_boolean
812
create_got_section (dynobj, info)
813
     bfd *dynobj;
814
     struct bfd_link_info *info;
815
{
816
  struct elf_s390_link_hash_table *htab;
817
 
818
  if (! _bfd_elf_create_got_section (dynobj, info))
819
    return FALSE;
820
 
821
  htab = elf_s390_hash_table (info);
822
  htab->sgot = bfd_get_section_by_name (dynobj, ".got");
823
  htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
824
  if (!htab->sgot || !htab->sgotplt)
825
    abort ();
826
 
827
  htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
828
                                               (SEC_ALLOC | SEC_LOAD
829
                                                | SEC_HAS_CONTENTS
830
                                                | SEC_IN_MEMORY
831
                                                | SEC_LINKER_CREATED
832
                                                | SEC_READONLY));
833
  if (htab->srelgot == NULL
834
      || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
835
    return FALSE;
836
  return TRUE;
837
}
838
 
839
/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
840
   .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
841
   hash table.  */
842
 
843
static bfd_boolean
844
elf_s390_create_dynamic_sections (dynobj, info)
845
     bfd *dynobj;
846
     struct bfd_link_info *info;
847
{
848
  struct elf_s390_link_hash_table *htab;
849
 
850
  htab = elf_s390_hash_table (info);
851
  if (!htab->sgot && !create_got_section (dynobj, info))
852
    return FALSE;
853
 
854
  if (!_bfd_elf_create_dynamic_sections (dynobj, info))
855
    return FALSE;
856
 
857
  htab->splt = bfd_get_section_by_name (dynobj, ".plt");
858
  htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
859
  htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
860
  if (!info->shared)
861
    htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
862
 
863
  if (!htab->splt || !htab->srelplt || !htab->sdynbss
864
      || (!info->shared && !htab->srelbss))
865
    abort ();
866
 
867
  return TRUE;
868
}
869
 
870
/* Copy the extra info we tack onto an elf_link_hash_entry.  */
871
 
872
static void
873
elf_s390_copy_indirect_symbol (info, dir, ind)
874
     struct bfd_link_info *info;
875
     struct elf_link_hash_entry *dir, *ind;
876
{
877
  struct elf_s390_link_hash_entry *edir, *eind;
878
 
879
  edir = (struct elf_s390_link_hash_entry *) dir;
880
  eind = (struct elf_s390_link_hash_entry *) ind;
881
 
882
  if (eind->dyn_relocs != NULL)
883
    {
884
      if (edir->dyn_relocs != NULL)
885
        {
886
          struct elf_s390_dyn_relocs **pp;
887
          struct elf_s390_dyn_relocs *p;
888
 
889
          /* Add reloc counts against the indirect sym to the direct sym
890
             list.  Merge any entries against the same section.  */
891
          for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
892
            {
893
              struct elf_s390_dyn_relocs *q;
894
 
895
              for (q = edir->dyn_relocs; q != NULL; q = q->next)
896
                if (q->sec == p->sec)
897
                  {
898
                    q->pc_count += p->pc_count;
899
                    q->count += p->count;
900
                    *pp = p->next;
901
                    break;
902
                  }
903
              if (q == NULL)
904
                pp = &p->next;
905
            }
906
          *pp = edir->dyn_relocs;
907
        }
908
 
909
      edir->dyn_relocs = eind->dyn_relocs;
910
      eind->dyn_relocs = NULL;
911
    }
912
 
913
  if (ind->root.type == bfd_link_hash_indirect
914
      && dir->got.refcount <= 0)
915
    {
916
      edir->tls_type = eind->tls_type;
917
      eind->tls_type = GOT_UNKNOWN;
918
    }
919
 
920
  if (ELIMINATE_COPY_RELOCS
921
      && ind->root.type != bfd_link_hash_indirect
922
      && dir->dynamic_adjusted)
923
    {
924
      /* If called to transfer flags for a weakdef during processing
925
         of elf_adjust_dynamic_symbol, don't copy non_got_ref.
926
         We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
927
      dir->ref_dynamic |= ind->ref_dynamic;
928
      dir->ref_regular |= ind->ref_regular;
929
      dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
930
      dir->needs_plt |= ind->needs_plt;
931
    }
932
  else
933
    _bfd_elf_link_hash_copy_indirect (info, dir, ind);
934
}
935
 
936
static int
937
elf_s390_tls_transition (info, r_type, is_local)
938
     struct bfd_link_info *info;
939
     int r_type;
940
     int is_local;
941
{
942
  if (info->shared)
943
    return r_type;
944
 
945
  switch (r_type)
946
    {
947
    case R_390_TLS_GD32:
948
    case R_390_TLS_IE32:
949
      if (is_local)
950
        return R_390_TLS_LE32;
951
      return R_390_TLS_IE32;
952
    case R_390_TLS_GOTIE32:
953
      if (is_local)
954
        return R_390_TLS_LE32;
955
      return R_390_TLS_GOTIE32;
956
    case R_390_TLS_LDM32:
957
      return R_390_TLS_LE32;
958
    }
959
 
960
  return r_type;
961
}
962
 
963
/* Look through the relocs for a section during the first phase, and
964
   allocate space in the global offset table or procedure linkage
965
   table.  */
966
 
967
static bfd_boolean
968
elf_s390_check_relocs (abfd, info, sec, relocs)
969
     bfd *abfd;
970
     struct bfd_link_info *info;
971
     asection *sec;
972
     const Elf_Internal_Rela *relocs;
973
{
974
  struct elf_s390_link_hash_table *htab;
975
  Elf_Internal_Shdr *symtab_hdr;
976
  struct elf_link_hash_entry **sym_hashes;
977
  const Elf_Internal_Rela *rel;
978
  const Elf_Internal_Rela *rel_end;
979
  asection *sreloc;
980
  bfd_signed_vma *local_got_refcounts;
981
  int tls_type, old_tls_type;
982
 
983
  if (info->relocatable)
984
    return TRUE;
985
 
986
  BFD_ASSERT (is_s390_elf (abfd));
987
 
988
  htab = elf_s390_hash_table (info);
989
  symtab_hdr = &elf_symtab_hdr (abfd);
990
  sym_hashes = elf_sym_hashes (abfd);
991
  local_got_refcounts = elf_local_got_refcounts (abfd);
992
 
993
  sreloc = NULL;
994
 
995
  rel_end = relocs + sec->reloc_count;
996
  for (rel = relocs; rel < rel_end; rel++)
997
    {
998
      unsigned int r_type;
999
      unsigned long r_symndx;
1000
      struct elf_link_hash_entry *h;
1001
 
1002
      r_symndx = ELF32_R_SYM (rel->r_info);
1003
 
1004
      if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1005
        {
1006
          (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1007
                                 abfd, r_symndx);
1008
          return FALSE;
1009
        }
1010
 
1011
      if (r_symndx < symtab_hdr->sh_info)
1012
        h = NULL;
1013
      else
1014
        {
1015
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1016
          while (h->root.type == bfd_link_hash_indirect
1017
                 || h->root.type == bfd_link_hash_warning)
1018
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
1019
        }
1020
 
1021
      /* Create got section and local_got_refcounts array if they
1022
         are needed.  */
1023
      r_type = elf_s390_tls_transition (info,
1024
                                        ELF32_R_TYPE (rel->r_info),
1025
                                        h == NULL);
1026
      switch (r_type)
1027
        {
1028
        case R_390_GOT12:
1029
        case R_390_GOT16:
1030
        case R_390_GOT20:
1031
        case R_390_GOT32:
1032
        case R_390_GOTENT:
1033
        case R_390_GOTPLT12:
1034
        case R_390_GOTPLT16:
1035
        case R_390_GOTPLT20:
1036
        case R_390_GOTPLT32:
1037
        case R_390_GOTPLTENT:
1038
        case R_390_TLS_GD32:
1039
        case R_390_TLS_GOTIE12:
1040
        case R_390_TLS_GOTIE20:
1041
        case R_390_TLS_GOTIE32:
1042
        case R_390_TLS_IEENT:
1043
        case R_390_TLS_IE32:
1044
        case R_390_TLS_LDM32:
1045
          if (h == NULL
1046
              && local_got_refcounts == NULL)
1047
            {
1048
              bfd_size_type size;
1049
 
1050
              size = symtab_hdr->sh_info;
1051
              size *= (sizeof (bfd_signed_vma) + sizeof(char));
1052
              local_got_refcounts = ((bfd_signed_vma *)
1053
                                     bfd_zalloc (abfd, size));
1054
              if (local_got_refcounts == NULL)
1055
                return FALSE;
1056
              elf_local_got_refcounts (abfd) = local_got_refcounts;
1057
              elf_s390_local_got_tls_type (abfd)
1058
                = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1059
            }
1060
          /* Fall through.  */
1061
        case R_390_GOTOFF16:
1062
        case R_390_GOTOFF32:
1063
        case R_390_GOTPC:
1064
        case R_390_GOTPCDBL:
1065
          if (htab->sgot == NULL)
1066
            {
1067
              if (htab->elf.dynobj == NULL)
1068
                htab->elf.dynobj = abfd;
1069
              if (!create_got_section (htab->elf.dynobj, info))
1070
                return FALSE;
1071
            }
1072
        }
1073
 
1074
      switch (r_type)
1075
        {
1076
        case R_390_GOTOFF16:
1077
        case R_390_GOTOFF32:
1078
        case R_390_GOTPC:
1079
        case R_390_GOTPCDBL:
1080
          /* Got is created, nothing to be done.  */
1081
          break;
1082
 
1083
        case R_390_PLT16DBL:
1084
        case R_390_PLT32DBL:
1085
        case R_390_PLT32:
1086
        case R_390_PLTOFF16:
1087
        case R_390_PLTOFF32:
1088
          /* This symbol requires a procedure linkage table entry.  We
1089
             actually build the entry in adjust_dynamic_symbol,
1090
             because this might be a case of linking PIC code which is
1091
             never referenced by a dynamic object, in which case we
1092
             don't need to generate a procedure linkage table entry
1093
             after all.  */
1094
 
1095
          /* If this is a local symbol, we resolve it directly without
1096
             creating a procedure linkage table entry.  */
1097
          if (h != NULL)
1098
            {
1099
              h->needs_plt = 1;
1100
              h->plt.refcount += 1;
1101
            }
1102
          break;
1103
 
1104
        case R_390_GOTPLT12:
1105
        case R_390_GOTPLT16:
1106
        case R_390_GOTPLT20:
1107
        case R_390_GOTPLT32:
1108
        case R_390_GOTPLTENT:
1109
          /* This symbol requires either a procedure linkage table entry
1110
             or an entry in the local got. We actually build the entry
1111
             in adjust_dynamic_symbol because whether this is really a
1112
             global reference can change and with it the fact if we have
1113
             to create a plt entry or a local got entry. To be able to
1114
             make a once global symbol a local one we have to keep track
1115
             of the number of gotplt references that exist for this
1116
             symbol.  */
1117
          if (h != NULL)
1118
            {
1119
              ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1120
              h->needs_plt = 1;
1121
              h->plt.refcount += 1;
1122
            }
1123
          else
1124
            local_got_refcounts[r_symndx] += 1;
1125
          break;
1126
 
1127
        case R_390_TLS_LDM32:
1128
          htab->tls_ldm_got.refcount += 1;
1129
          break;
1130
 
1131
        case R_390_TLS_IE32:
1132
        case R_390_TLS_GOTIE12:
1133
        case R_390_TLS_GOTIE20:
1134
        case R_390_TLS_GOTIE32:
1135
        case R_390_TLS_IEENT:
1136
          if (info->shared)
1137
            info->flags |= DF_STATIC_TLS;
1138
          /* Fall through.  */
1139
 
1140
        case R_390_GOT12:
1141
        case R_390_GOT16:
1142
        case R_390_GOT20:
1143
        case R_390_GOT32:
1144
        case R_390_GOTENT:
1145
        case R_390_TLS_GD32:
1146
          /* This symbol requires a global offset table entry.  */
1147
          switch (r_type)
1148
            {
1149
            default:
1150
            case R_390_GOT12:
1151
            case R_390_GOT16:
1152
            case R_390_GOT20:
1153
            case R_390_GOT32:
1154
            case R_390_GOTENT:
1155
              tls_type = GOT_NORMAL;
1156
              break;
1157
            case R_390_TLS_GD32:
1158
              tls_type = GOT_TLS_GD;
1159
              break;
1160
            case R_390_TLS_IE32:
1161
            case R_390_TLS_GOTIE32:
1162
              tls_type = GOT_TLS_IE;
1163
              break;
1164
            case R_390_TLS_GOTIE12:
1165
            case R_390_TLS_GOTIE20:
1166
            case R_390_TLS_IEENT:
1167
              tls_type = GOT_TLS_IE_NLT;
1168
              break;
1169
            }
1170
 
1171
          if (h != NULL)
1172
            {
1173
              h->got.refcount += 1;
1174
              old_tls_type = elf_s390_hash_entry(h)->tls_type;
1175
            }
1176
          else
1177
            {
1178
              local_got_refcounts[r_symndx] += 1;
1179
              old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1180
            }
1181
          /* If a TLS symbol is accessed using IE at least once,
1182
             there is no point to use dynamic model for it.  */
1183
          if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1184
            {
1185
              if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1186
                {
1187
                  (*_bfd_error_handler)
1188
                    (_("%B: `%s' accessed both as normal and thread local symbol"),
1189
                     abfd, h->root.root.string);
1190
                  return FALSE;
1191
                }
1192
              if (old_tls_type > tls_type)
1193
                tls_type = old_tls_type;
1194
            }
1195
 
1196
          if (old_tls_type != tls_type)
1197
            {
1198
              if (h != NULL)
1199
                elf_s390_hash_entry (h)->tls_type = tls_type;
1200
              else
1201
                elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1202
            }
1203
 
1204
          if (r_type != R_390_TLS_IE32)
1205
            break;
1206
          /* Fall through.  */
1207
 
1208
        case R_390_TLS_LE32:
1209
          if (!info->shared)
1210
            break;
1211
          info->flags |= DF_STATIC_TLS;
1212
          /* Fall through.  */
1213
 
1214
        case R_390_8:
1215
        case R_390_16:
1216
        case R_390_32:
1217
        case R_390_PC16:
1218
        case R_390_PC16DBL:
1219
        case R_390_PC32DBL:
1220
        case R_390_PC32:
1221
          if (h != NULL && !info->shared)
1222
            {
1223
              /* If this reloc is in a read-only section, we might
1224
                 need a copy reloc.  We can't check reliably at this
1225
                 stage whether the section is read-only, as input
1226
                 sections have not yet been mapped to output sections.
1227
                 Tentatively set the flag for now, and correct in
1228
                 adjust_dynamic_symbol.  */
1229
              h->non_got_ref = 1;
1230
 
1231
              /* We may need a .plt entry if the function this reloc
1232
                 refers to is in a shared lib.  */
1233
              h->plt.refcount += 1;
1234
            }
1235
 
1236
          /* If we are creating a shared library, and this is a reloc
1237
             against a global symbol, or a non PC relative reloc
1238
             against a local symbol, then we need to copy the reloc
1239
             into the shared library.  However, if we are linking with
1240
             -Bsymbolic, we do not need to copy a reloc against a
1241
             global symbol which is defined in an object we are
1242
             including in the link (i.e., DEF_REGULAR is set).  At
1243
             this point we have not seen all the input files, so it is
1244
             possible that DEF_REGULAR is not set now but will be set
1245
             later (it is never cleared).  In case of a weak definition,
1246
             DEF_REGULAR may be cleared later by a strong definition in
1247
             a shared library. We account for that possibility below by
1248
             storing information in the relocs_copied field of the hash
1249
             table entry.  A similar situation occurs when creating
1250
             shared libraries and symbol visibility changes render the
1251
             symbol local.
1252
 
1253
             If on the other hand, we are creating an executable, we
1254
             may need to keep relocations for symbols satisfied by a
1255
             dynamic library if we manage to avoid copy relocs for the
1256
             symbol.  */
1257
          if ((info->shared
1258
               && (sec->flags & SEC_ALLOC) != 0
1259
               && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1260
                    && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1261
                    && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1262
                    && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1263
                   || (h != NULL
1264
                       && (! info->symbolic
1265
                           || h->root.type == bfd_link_hash_defweak
1266
                           || !h->def_regular))))
1267
              || (ELIMINATE_COPY_RELOCS
1268
                  && !info->shared
1269
                  && (sec->flags & SEC_ALLOC) != 0
1270
                  && h != NULL
1271
                  && (h->root.type == bfd_link_hash_defweak
1272
                      || !h->def_regular)))
1273
            {
1274
              struct elf_s390_dyn_relocs *p;
1275
              struct elf_s390_dyn_relocs **head;
1276
 
1277
              /* We must copy these reloc types into the output file.
1278
                 Create a reloc section in dynobj and make room for
1279
                 this reloc.  */
1280
              if (sreloc == NULL)
1281
                {
1282
                  const char *name;
1283
                  bfd *dynobj;
1284
 
1285
                  name = (bfd_elf_string_from_elf_section
1286
                          (abfd,
1287
                           elf_elfheader (abfd)->e_shstrndx,
1288
                           elf_section_data (sec)->rel_hdr.sh_name));
1289
                  if (name == NULL)
1290
                    return FALSE;
1291
 
1292
                  if (! CONST_STRNEQ (name, ".rela")
1293
                      || strcmp (bfd_get_section_name (abfd, sec),
1294
                                 name + 5) != 0)
1295
                    {
1296
                      (*_bfd_error_handler)
1297
                        (_("%B: bad relocation section name `%s\'"),
1298
                         abfd, name);
1299
                    }
1300
 
1301
                  if (htab->elf.dynobj == NULL)
1302
                    htab->elf.dynobj = abfd;
1303
 
1304
                  dynobj = htab->elf.dynobj;
1305
                  sreloc = bfd_get_section_by_name (dynobj, name);
1306
                  if (sreloc == NULL)
1307
                    {
1308
                      flagword flags;
1309
 
1310
                      flags = (SEC_HAS_CONTENTS | SEC_READONLY
1311
                               | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1312
                      if ((sec->flags & SEC_ALLOC) != 0)
1313
                        flags |= SEC_ALLOC | SEC_LOAD;
1314
                      sreloc = bfd_make_section_with_flags (dynobj,
1315
                                                            name,
1316
                                                            flags);
1317
                      if (sreloc == NULL
1318
                          || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1319
                        return FALSE;
1320
                    }
1321
                  elf_section_data (sec)->sreloc = sreloc;
1322
                }
1323
 
1324
              /* If this is a global symbol, we count the number of
1325
                 relocations we need for this symbol.  */
1326
              if (h != NULL)
1327
                {
1328
                  head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1329
                }
1330
              else
1331
                {
1332
                  /* Track dynamic relocs needed for local syms too.
1333
                     We really need local syms available to do this
1334
                     easily.  Oh well.  */
1335
                  asection *s;
1336
                  void *vpp;
1337
 
1338
                  s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1339
                                                 sec, r_symndx);
1340
                  if (s == NULL)
1341
                    return FALSE;
1342
 
1343
                  vpp = &elf_section_data (s)->local_dynrel;
1344
                  head = (struct elf_s390_dyn_relocs **) vpp;
1345
                }
1346
 
1347
              p = *head;
1348
              if (p == NULL || p->sec != sec)
1349
                {
1350
                  bfd_size_type amt = sizeof *p;
1351
 
1352
                  p = ((struct elf_s390_dyn_relocs *)
1353
                       bfd_alloc (htab->elf.dynobj, amt));
1354
                  if (p == NULL)
1355
                    return FALSE;
1356
                  p->next = *head;
1357
                  *head = p;
1358
                  p->sec = sec;
1359
                  p->count = 0;
1360
                  p->pc_count = 0;
1361
                }
1362
 
1363
              p->count += 1;
1364
              if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1365
                  || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1366
                  || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1367
                  || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1368
                p->pc_count += 1;
1369
            }
1370
          break;
1371
 
1372
          /* This relocation describes the C++ object vtable hierarchy.
1373
             Reconstruct it for later use during GC.  */
1374
        case R_390_GNU_VTINHERIT:
1375
          if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1376
            return FALSE;
1377
          break;
1378
 
1379
          /* This relocation describes which C++ vtable entries are actually
1380
             used.  Record for later use during GC.  */
1381
        case R_390_GNU_VTENTRY:
1382
          BFD_ASSERT (h != NULL);
1383
          if (h != NULL
1384
              && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1385
            return FALSE;
1386
          break;
1387
 
1388
        default:
1389
          break;
1390
        }
1391
    }
1392
 
1393
  return TRUE;
1394
}
1395
 
1396
/* Return the section that should be marked against GC for a given
1397
   relocation.  */
1398
 
1399
static asection *
1400
elf_s390_gc_mark_hook (asection *sec,
1401
                       struct bfd_link_info *info,
1402
                       Elf_Internal_Rela *rel,
1403
                       struct elf_link_hash_entry *h,
1404
                       Elf_Internal_Sym *sym)
1405
{
1406
  if (h != NULL)
1407
    switch (ELF32_R_TYPE (rel->r_info))
1408
      {
1409
      case R_390_GNU_VTINHERIT:
1410
      case R_390_GNU_VTENTRY:
1411
        return NULL;
1412
      }
1413
  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1414
 
1415
}
1416
 
1417
/* Update the got entry reference counts for the section being removed.  */
1418
 
1419
static bfd_boolean
1420
elf_s390_gc_sweep_hook (bfd *abfd,
1421
                        struct bfd_link_info *info,
1422
                        asection *sec,
1423
                        const Elf_Internal_Rela *relocs)
1424
{
1425
  Elf_Internal_Shdr *symtab_hdr;
1426
  struct elf_link_hash_entry **sym_hashes;
1427
  bfd_signed_vma *local_got_refcounts;
1428
  const Elf_Internal_Rela *rel, *relend;
1429
 
1430
  if (info->relocatable)
1431
    return TRUE;
1432
 
1433
  elf_section_data (sec)->local_dynrel = NULL;
1434
 
1435
  symtab_hdr = &elf_symtab_hdr (abfd);
1436
  sym_hashes = elf_sym_hashes (abfd);
1437
  local_got_refcounts = elf_local_got_refcounts (abfd);
1438
 
1439
  relend = relocs + sec->reloc_count;
1440
  for (rel = relocs; rel < relend; rel++)
1441
    {
1442
      unsigned long r_symndx;
1443
      unsigned int r_type;
1444
      struct elf_link_hash_entry *h = NULL;
1445
 
1446
      r_symndx = ELF32_R_SYM (rel->r_info);
1447
      if (r_symndx >= symtab_hdr->sh_info)
1448
        {
1449
          struct elf_s390_link_hash_entry *eh;
1450
          struct elf_s390_dyn_relocs **pp;
1451
          struct elf_s390_dyn_relocs *p;
1452
 
1453
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1454
          while (h->root.type == bfd_link_hash_indirect
1455
                 || h->root.type == bfd_link_hash_warning)
1456
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
1457
          eh = (struct elf_s390_link_hash_entry *) h;
1458
 
1459
          for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1460
            if (p->sec == sec)
1461
              {
1462
                /* Everything must go for SEC.  */
1463
                *pp = p->next;
1464
                break;
1465
              }
1466
        }
1467
 
1468
      r_type = ELF32_R_TYPE (rel->r_info);
1469
      r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1470
      switch (r_type)
1471
        {
1472
        case R_390_TLS_LDM32:
1473
          if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1474
            elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1475
          break;
1476
 
1477
        case R_390_TLS_GD32:
1478
        case R_390_TLS_IE32:
1479
        case R_390_TLS_GOTIE12:
1480
        case R_390_TLS_GOTIE20:
1481
        case R_390_TLS_GOTIE32:
1482
        case R_390_TLS_IEENT:
1483
        case R_390_GOT12:
1484
        case R_390_GOT16:
1485
        case R_390_GOT20:
1486
        case R_390_GOT32:
1487
        case R_390_GOTOFF16:
1488
        case R_390_GOTOFF32:
1489
        case R_390_GOTPC:
1490
        case R_390_GOTPCDBL:
1491
        case R_390_GOTENT:
1492
          if (h != NULL)
1493
            {
1494
              if (h->got.refcount > 0)
1495
                h->got.refcount -= 1;
1496
            }
1497
          else if (local_got_refcounts != NULL)
1498
            {
1499
              if (local_got_refcounts[r_symndx] > 0)
1500
                local_got_refcounts[r_symndx] -= 1;
1501
            }
1502
          break;
1503
 
1504
        case R_390_8:
1505
        case R_390_12:
1506
        case R_390_16:
1507
        case R_390_20:
1508
        case R_390_32:
1509
        case R_390_PC16:
1510
        case R_390_PC16DBL:
1511
        case R_390_PC32DBL:
1512
        case R_390_PC32:
1513
          if (info->shared)
1514
            break;
1515
          /* Fall through.  */
1516
 
1517
        case R_390_PLT16DBL:
1518
        case R_390_PLT32DBL:
1519
        case R_390_PLT32:
1520
        case R_390_PLTOFF16:
1521
        case R_390_PLTOFF32:
1522
          if (h != NULL)
1523
            {
1524
              if (h->plt.refcount > 0)
1525
                h->plt.refcount -= 1;
1526
            }
1527
          break;
1528
 
1529
        case R_390_GOTPLT12:
1530
        case R_390_GOTPLT16:
1531
        case R_390_GOTPLT20:
1532
        case R_390_GOTPLT32:
1533
        case R_390_GOTPLTENT:
1534
          if (h != NULL)
1535
            {
1536
              if (h->plt.refcount > 0)
1537
                {
1538
                  ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1539
                  h->plt.refcount -= 1;
1540
                }
1541
            }
1542
          else if (local_got_refcounts != NULL)
1543
            {
1544
              if (local_got_refcounts[r_symndx] > 0)
1545
                local_got_refcounts[r_symndx] -= 1;
1546
            }
1547
          break;
1548
 
1549
        default:
1550
          break;
1551
        }
1552
    }
1553
 
1554
  return TRUE;
1555
}
1556
 
1557
/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1558
   entry but we found we will not create any.  Called when we find we will
1559
   not have any PLT for this symbol, by for example
1560
   elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1561
   or elf_s390_size_dynamic_sections if no dynamic sections will be
1562
   created (we're only linking static objects).  */
1563
 
1564
static void
1565
elf_s390_adjust_gotplt (h)
1566
     struct elf_s390_link_hash_entry *h;
1567
{
1568
  if (h->elf.root.type == bfd_link_hash_warning)
1569
    h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1570
 
1571
  if (h->gotplt_refcount <= 0)
1572
    return;
1573
 
1574
  /* We simply add the number of gotplt references to the number
1575
   * of got references for this symbol.  */
1576
  h->elf.got.refcount += h->gotplt_refcount;
1577
  h->gotplt_refcount = -1;
1578
}
1579
 
1580
/* Adjust a symbol defined by a dynamic object and referenced by a
1581
   regular object.  The current definition is in some section of the
1582
   dynamic object, but we're not including those sections.  We have to
1583
   change the definition to something the rest of the link can
1584
   understand.  */
1585
 
1586
static bfd_boolean
1587
elf_s390_adjust_dynamic_symbol (info, h)
1588
     struct bfd_link_info *info;
1589
     struct elf_link_hash_entry *h;
1590
{
1591
  struct elf_s390_link_hash_table *htab;
1592
  asection *s;
1593
 
1594
  /* If this is a function, put it in the procedure linkage table.  We
1595
     will fill in the contents of the procedure linkage table later
1596
     (although we could actually do it here).  */
1597
  if (h->type == STT_FUNC
1598
      || h->needs_plt)
1599
    {
1600
      if (h->plt.refcount <= 0
1601
          || (! info->shared
1602
              && !h->def_dynamic
1603
              && !h->ref_dynamic
1604
              && h->root.type != bfd_link_hash_undefweak
1605
              && h->root.type != bfd_link_hash_undefined))
1606
        {
1607
          /* This case can occur if we saw a PLT32 reloc in an input
1608
             file, but the symbol was never referred to by a dynamic
1609
             object, or if all references were garbage collected.  In
1610
             such a case, we don't actually need to build a procedure
1611
             linkage table, and we can just do a PC32 reloc instead.  */
1612
          h->plt.offset = (bfd_vma) -1;
1613
          h->needs_plt = 0;
1614
          elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1615
        }
1616
 
1617
      return TRUE;
1618
    }
1619
  else
1620
    /* It's possible that we incorrectly decided a .plt reloc was
1621
       needed for an R_390_PC32 reloc to a non-function sym in
1622
       check_relocs.  We can't decide accurately between function and
1623
       non-function syms in check-relocs;  Objects loaded later in
1624
       the link may change h->type.  So fix it now.  */
1625
    h->plt.offset = (bfd_vma) -1;
1626
 
1627
  /* If this is a weak symbol, and there is a real definition, the
1628
     processor independent code will have arranged for us to see the
1629
     real definition first, and we can just use the same value.  */
1630
  if (h->u.weakdef != NULL)
1631
    {
1632
      BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1633
                  || h->u.weakdef->root.type == bfd_link_hash_defweak);
1634
      h->root.u.def.section = h->u.weakdef->root.u.def.section;
1635
      h->root.u.def.value = h->u.weakdef->root.u.def.value;
1636
      if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1637
        h->non_got_ref = h->u.weakdef->non_got_ref;
1638
      return TRUE;
1639
    }
1640
 
1641
  /* This is a reference to a symbol defined by a dynamic object which
1642
     is not a function.  */
1643
 
1644
  /* If we are creating a shared library, we must presume that the
1645
     only references to the symbol are via the global offset table.
1646
     For such cases we need not do anything here; the relocations will
1647
     be handled correctly by relocate_section.  */
1648
  if (info->shared)
1649
    return TRUE;
1650
 
1651
  /* If there are no references to this symbol that do not use the
1652
     GOT, we don't need to generate a copy reloc.  */
1653
  if (!h->non_got_ref)
1654
    return TRUE;
1655
 
1656
  /* If -z nocopyreloc was given, we won't generate them either.  */
1657
  if (info->nocopyreloc)
1658
    {
1659
      h->non_got_ref = 0;
1660
      return TRUE;
1661
    }
1662
 
1663
  if (ELIMINATE_COPY_RELOCS)
1664
    {
1665
      struct elf_s390_link_hash_entry * eh;
1666
      struct elf_s390_dyn_relocs *p;
1667
 
1668
      eh = (struct elf_s390_link_hash_entry *) h;
1669
      for (p = eh->dyn_relocs; p != NULL; p = p->next)
1670
        {
1671
          s = p->sec->output_section;
1672
          if (s != NULL && (s->flags & SEC_READONLY) != 0)
1673
            break;
1674
        }
1675
 
1676
      /* If we didn't find any dynamic relocs in read-only sections, then
1677
         we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
1678
      if (p == NULL)
1679
        {
1680
          h->non_got_ref = 0;
1681
          return TRUE;
1682
        }
1683
    }
1684
 
1685
  if (h->size == 0)
1686
    {
1687
      (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1688
                             h->root.root.string);
1689
      return TRUE;
1690
    }
1691
 
1692
  /* We must allocate the symbol in our .dynbss section, which will
1693
     become part of the .bss section of the executable.  There will be
1694
     an entry for this symbol in the .dynsym section.  The dynamic
1695
     object will contain position independent code, so all references
1696
     from the dynamic object to this symbol will go through the global
1697
     offset table.  The dynamic linker will use the .dynsym entry to
1698
     determine the address it must put in the global offset table, so
1699
     both the dynamic object and the regular object will refer to the
1700
     same memory location for the variable.  */
1701
 
1702
  htab = elf_s390_hash_table (info);
1703
 
1704
  /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1705
     copy the initial value out of the dynamic object and into the
1706
     runtime process image.  */
1707
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1708
    {
1709
      htab->srelbss->size += sizeof (Elf32_External_Rela);
1710
      h->needs_copy = 1;
1711
    }
1712
 
1713
  s = htab->sdynbss;
1714
 
1715
  return _bfd_elf_adjust_dynamic_copy (h, s);
1716
}
1717
 
1718
/* Allocate space in .plt, .got and associated reloc sections for
1719
   dynamic relocs.  */
1720
 
1721
static bfd_boolean
1722
allocate_dynrelocs (h, inf)
1723
     struct elf_link_hash_entry *h;
1724
     PTR inf;
1725
{
1726
  struct bfd_link_info *info;
1727
  struct elf_s390_link_hash_table *htab;
1728
  struct elf_s390_link_hash_entry *eh;
1729
  struct elf_s390_dyn_relocs *p;
1730
 
1731
  if (h->root.type == bfd_link_hash_indirect)
1732
    return TRUE;
1733
 
1734
  if (h->root.type == bfd_link_hash_warning)
1735
    /* When warning symbols are created, they **replace** the "real"
1736
       entry in the hash table, thus we never get to see the real
1737
       symbol in a hash traversal.  So look at it now.  */
1738
    h = (struct elf_link_hash_entry *) h->root.u.i.link;
1739
 
1740
  info = (struct bfd_link_info *) inf;
1741
  htab = elf_s390_hash_table (info);
1742
 
1743
  if (htab->elf.dynamic_sections_created
1744
      && h->plt.refcount > 0
1745
      && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1746
          || h->root.type != bfd_link_hash_undefweak))
1747
    {
1748
      /* Make sure this symbol is output as a dynamic symbol.
1749
         Undefined weak syms won't yet be marked as dynamic.  */
1750
      if (h->dynindx == -1
1751
          && !h->forced_local)
1752
        {
1753
          if (! bfd_elf_link_record_dynamic_symbol (info, h))
1754
            return FALSE;
1755
        }
1756
 
1757
      if (info->shared
1758
          || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1759
        {
1760
          asection *s = htab->splt;
1761
 
1762
          /* If this is the first .plt entry, make room for the special
1763
             first entry.  */
1764
          if (s->size == 0)
1765
            s->size += PLT_FIRST_ENTRY_SIZE;
1766
 
1767
          h->plt.offset = s->size;
1768
 
1769
          /* If this symbol is not defined in a regular file, and we are
1770
             not generating a shared library, then set the symbol to this
1771
             location in the .plt.  This is required to make function
1772
             pointers compare as equal between the normal executable and
1773
             the shared library.  */
1774
          if (! info->shared
1775
              && !h->def_regular)
1776
            {
1777
              h->root.u.def.section = s;
1778
              h->root.u.def.value = h->plt.offset;
1779
            }
1780
 
1781
          /* Make room for this entry.  */
1782
          s->size += PLT_ENTRY_SIZE;
1783
 
1784
          /* We also need to make an entry in the .got.plt section, which
1785
             will be placed in the .got section by the linker script.  */
1786
          htab->sgotplt->size += GOT_ENTRY_SIZE;
1787
 
1788
          /* We also need to make an entry in the .rela.plt section.  */
1789
          htab->srelplt->size += sizeof (Elf32_External_Rela);
1790
        }
1791
      else
1792
        {
1793
          h->plt.offset = (bfd_vma) -1;
1794
          h->needs_plt = 0;
1795
          elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1796
        }
1797
    }
1798
  else
1799
    {
1800
      h->plt.offset = (bfd_vma) -1;
1801
      h->needs_plt = 0;
1802
      elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1803
    }
1804
 
1805
  /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1806
     the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1807
     to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1808
     we can save the dynamic TLS relocation.  */
1809
  if (h->got.refcount > 0
1810
      && !info->shared
1811
      && h->dynindx == -1
1812
      && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1813
    {
1814
      if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1815
        /* For the GOTIE access without a literal pool entry the offset has
1816
           to be stored somewhere. The immediate value in the instruction
1817
           is not bit enough so the value is stored in the got.  */
1818
        {
1819
          h->got.offset = htab->sgot->size;
1820
          htab->sgot->size += GOT_ENTRY_SIZE;
1821
        }
1822
      else
1823
        h->got.offset = (bfd_vma) -1;
1824
    }
1825
  else if (h->got.refcount > 0)
1826
   {
1827
      asection *s;
1828
      bfd_boolean dyn;
1829
      int tls_type = elf_s390_hash_entry(h)->tls_type;
1830
 
1831
      /* Make sure this symbol is output as a dynamic symbol.
1832
         Undefined weak syms won't yet be marked as dynamic.  */
1833
      if (h->dynindx == -1
1834
          && !h->forced_local)
1835
        {
1836
          if (! bfd_elf_link_record_dynamic_symbol (info, h))
1837
            return FALSE;
1838
        }
1839
 
1840
      s = htab->sgot;
1841
      h->got.offset = s->size;
1842
      s->size += GOT_ENTRY_SIZE;
1843
      /* R_390_TLS_GD32 needs 2 consecutive GOT slots.  */
1844
      if (tls_type == GOT_TLS_GD)
1845
        s->size += GOT_ENTRY_SIZE;
1846
      dyn = htab->elf.dynamic_sections_created;
1847
      /* R_390_TLS_IE32 needs one dynamic relocation,
1848
         R_390_TLS_GD32 needs one if local symbol and two if global.  */
1849
      if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1850
          || tls_type >= GOT_TLS_IE)
1851
        htab->srelgot->size += sizeof (Elf32_External_Rela);
1852
      else if (tls_type == GOT_TLS_GD)
1853
        htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1854
      else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1855
                || h->root.type != bfd_link_hash_undefweak)
1856
               && (info->shared
1857
                   || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1858
        htab->srelgot->size += sizeof (Elf32_External_Rela);
1859
    }
1860
  else
1861
    h->got.offset = (bfd_vma) -1;
1862
 
1863
  eh = (struct elf_s390_link_hash_entry *) h;
1864
  if (eh->dyn_relocs == NULL)
1865
    return TRUE;
1866
 
1867
  /* In the shared -Bsymbolic case, discard space allocated for
1868
     dynamic pc-relative relocs against symbols which turn out to be
1869
     defined in regular objects.  For the normal shared case, discard
1870
     space for pc-relative relocs that have become local due to symbol
1871
     visibility changes.  */
1872
 
1873
  if (info->shared)
1874
    {
1875
      if (SYMBOL_REFERENCES_LOCAL (info, h))
1876
        {
1877
          struct elf_s390_dyn_relocs **pp;
1878
 
1879
          for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1880
            {
1881
              p->count -= p->pc_count;
1882
              p->pc_count = 0;
1883
              if (p->count == 0)
1884
                *pp = p->next;
1885
              else
1886
                pp = &p->next;
1887
            }
1888
        }
1889
 
1890
      /* Also discard relocs on undefined weak syms with non-default
1891
         visibility.  */
1892
      if (eh->dyn_relocs != NULL
1893
          && h->root.type == bfd_link_hash_undefweak)
1894
        {
1895
          if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1896
            eh->dyn_relocs = NULL;
1897
 
1898
          /* Make sure undefined weak symbols are output as a dynamic
1899
             symbol in PIEs.  */
1900
          else if (h->dynindx == -1
1901
                   && !h->forced_local)
1902
            {
1903
              if (! bfd_elf_link_record_dynamic_symbol (info, h))
1904
                return FALSE;
1905
            }
1906
        }
1907
    }
1908
  else if (ELIMINATE_COPY_RELOCS)
1909
    {
1910
      /* For the non-shared case, discard space for relocs against
1911
         symbols which turn out to need copy relocs or are not
1912
         dynamic.  */
1913
 
1914
      if (!h->non_got_ref
1915
          && ((h->def_dynamic
1916
               && !h->def_regular)
1917
              || (htab->elf.dynamic_sections_created
1918
                  && (h->root.type == bfd_link_hash_undefweak
1919
                      || h->root.type == bfd_link_hash_undefined))))
1920
        {
1921
          /* Make sure this symbol is output as a dynamic symbol.
1922
             Undefined weak syms won't yet be marked as dynamic.  */
1923
          if (h->dynindx == -1
1924
              && !h->forced_local)
1925
            {
1926
              if (! bfd_elf_link_record_dynamic_symbol (info, h))
1927
                return FALSE;
1928
            }
1929
 
1930
          /* If that succeeded, we know we'll be keeping all the
1931
             relocs.  */
1932
          if (h->dynindx != -1)
1933
            goto keep;
1934
        }
1935
 
1936
      eh->dyn_relocs = NULL;
1937
 
1938
    keep: ;
1939
    }
1940
 
1941
  /* Finally, allocate space.  */
1942
  for (p = eh->dyn_relocs; p != NULL; p = p->next)
1943
    {
1944
      asection *sreloc = elf_section_data (p->sec)->sreloc;
1945
 
1946
      sreloc->size += p->count * sizeof (Elf32_External_Rela);
1947
    }
1948
 
1949
  return TRUE;
1950
}
1951
 
1952
/* Find any dynamic relocs that apply to read-only sections.  */
1953
 
1954
static bfd_boolean
1955
readonly_dynrelocs (h, inf)
1956
     struct elf_link_hash_entry *h;
1957
     PTR inf;
1958
{
1959
  struct elf_s390_link_hash_entry *eh;
1960
  struct elf_s390_dyn_relocs *p;
1961
 
1962
  if (h->root.type == bfd_link_hash_warning)
1963
    h = (struct elf_link_hash_entry *) h->root.u.i.link;
1964
 
1965
  eh = (struct elf_s390_link_hash_entry *) h;
1966
  for (p = eh->dyn_relocs; p != NULL; p = p->next)
1967
    {
1968
      asection *s = p->sec->output_section;
1969
 
1970
      if (s != NULL && (s->flags & SEC_READONLY) != 0)
1971
        {
1972
          struct bfd_link_info *info = (struct bfd_link_info *) inf;
1973
 
1974
          info->flags |= DF_TEXTREL;
1975
 
1976
          /* Not an error, just cut short the traversal.  */
1977
          return FALSE;
1978
        }
1979
    }
1980
  return TRUE;
1981
}
1982
 
1983
/* Set the sizes of the dynamic sections.  */
1984
 
1985
static bfd_boolean
1986
elf_s390_size_dynamic_sections (output_bfd, info)
1987
     bfd *output_bfd ATTRIBUTE_UNUSED;
1988
     struct bfd_link_info *info;
1989
{
1990
  struct elf_s390_link_hash_table *htab;
1991
  bfd *dynobj;
1992
  asection *s;
1993
  bfd_boolean relocs;
1994
  bfd *ibfd;
1995
 
1996
  htab = elf_s390_hash_table (info);
1997
  dynobj = htab->elf.dynobj;
1998
  if (dynobj == NULL)
1999
    abort ();
2000
 
2001
  if (htab->elf.dynamic_sections_created)
2002
    {
2003
      /* Set the contents of the .interp section to the interpreter.  */
2004
      if (info->executable)
2005
        {
2006
          s = bfd_get_section_by_name (dynobj, ".interp");
2007
          if (s == NULL)
2008
            abort ();
2009
          s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2010
          s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2011
        }
2012
    }
2013
 
2014
  /* Set up .got offsets for local syms, and space for local dynamic
2015
     relocs.  */
2016
  for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2017
    {
2018
      bfd_signed_vma *local_got;
2019
      bfd_signed_vma *end_local_got;
2020
      char *local_tls_type;
2021
      bfd_size_type locsymcount;
2022
      Elf_Internal_Shdr *symtab_hdr;
2023
      asection *srela;
2024
 
2025
      if (! is_s390_elf (ibfd))
2026
        continue;
2027
 
2028
      for (s = ibfd->sections; s != NULL; s = s->next)
2029
        {
2030
          struct elf_s390_dyn_relocs *p;
2031
 
2032
          for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2033
            {
2034
              if (!bfd_is_abs_section (p->sec)
2035
                  && bfd_is_abs_section (p->sec->output_section))
2036
                {
2037
                  /* Input section has been discarded, either because
2038
                     it is a copy of a linkonce section or due to
2039
                     linker script /DISCARD/, so we'll be discarding
2040
                     the relocs too.  */
2041
                }
2042
              else if (p->count != 0)
2043
                {
2044
                  srela = elf_section_data (p->sec)->sreloc;
2045
                  srela->size += p->count * sizeof (Elf32_External_Rela);
2046
                  if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2047
                    info->flags |= DF_TEXTREL;
2048
                }
2049
            }
2050
        }
2051
 
2052
      local_got = elf_local_got_refcounts (ibfd);
2053
      if (!local_got)
2054
        continue;
2055
 
2056
      symtab_hdr = &elf_symtab_hdr (ibfd);
2057
      locsymcount = symtab_hdr->sh_info;
2058
      end_local_got = local_got + locsymcount;
2059
      local_tls_type = elf_s390_local_got_tls_type (ibfd);
2060
      s = htab->sgot;
2061
      srela = htab->srelgot;
2062
      for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2063
        {
2064
          if (*local_got > 0)
2065
            {
2066
              *local_got = s->size;
2067
              s->size += GOT_ENTRY_SIZE;
2068
              if (*local_tls_type == GOT_TLS_GD)
2069
                s->size += GOT_ENTRY_SIZE;
2070
              if (info->shared)
2071
                srela->size += sizeof (Elf32_External_Rela);
2072
            }
2073
          else
2074
            *local_got = (bfd_vma) -1;
2075
        }
2076
    }
2077
 
2078
  if (htab->tls_ldm_got.refcount > 0)
2079
    {
2080
      /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2081
         relocs.  */
2082
      htab->tls_ldm_got.offset = htab->sgot->size;
2083
      htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2084
      htab->srelgot->size += sizeof (Elf32_External_Rela);
2085
    }
2086
  else
2087
    htab->tls_ldm_got.offset = -1;
2088
 
2089
  /* Allocate global sym .plt and .got entries, and space for global
2090
     sym dynamic relocs.  */
2091
  elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2092
 
2093
  /* We now have determined the sizes of the various dynamic sections.
2094
     Allocate memory for them.  */
2095
  relocs = FALSE;
2096
  for (s = dynobj->sections; s != NULL; s = s->next)
2097
    {
2098
      if ((s->flags & SEC_LINKER_CREATED) == 0)
2099
        continue;
2100
 
2101
      if (s == htab->splt
2102
          || s == htab->sgot
2103
          || s == htab->sgotplt
2104
          || s == htab->sdynbss)
2105
        {
2106
          /* Strip this section if we don't need it; see the
2107
             comment below.  */
2108
        }
2109
      else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2110
        {
2111
          if (s->size != 0)
2112
            relocs = TRUE;
2113
 
2114
          /* We use the reloc_count field as a counter if we need
2115
             to copy relocs into the output file.  */
2116
          s->reloc_count = 0;
2117
        }
2118
      else
2119
        {
2120
          /* It's not one of our sections, so don't allocate space.  */
2121
          continue;
2122
        }
2123
 
2124
      if (s->size == 0)
2125
        {
2126
          /* If we don't need this section, strip it from the
2127
             output file.  This is to handle .rela.bss and
2128
             .rela.plt.  We must create it in
2129
             create_dynamic_sections, because it must be created
2130
             before the linker maps input sections to output
2131
             sections.  The linker does that before
2132
             adjust_dynamic_symbol is called, and it is that
2133
             function which decides whether anything needs to go
2134
             into these sections.  */
2135
 
2136
          s->flags |= SEC_EXCLUDE;
2137
          continue;
2138
        }
2139
 
2140
      if ((s->flags & SEC_HAS_CONTENTS) == 0)
2141
        continue;
2142
 
2143
      /* Allocate memory for the section contents.  We use bfd_zalloc
2144
         here in case unused entries are not reclaimed before the
2145
         section's contents are written out.  This should not happen,
2146
         but this way if it does, we get a R_390_NONE reloc instead
2147
         of garbage.  */
2148
      s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2149
      if (s->contents == NULL)
2150
        return FALSE;
2151
    }
2152
 
2153
  if (htab->elf.dynamic_sections_created)
2154
    {
2155
      /* Add some entries to the .dynamic section.  We fill in the
2156
         values later, in elf_s390_finish_dynamic_sections, but we
2157
         must add the entries now so that we get the correct size for
2158
         the .dynamic section.  The DT_DEBUG entry is filled in by the
2159
         dynamic linker and used by the debugger.  */
2160
#define add_dynamic_entry(TAG, VAL) \
2161
  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2162
 
2163
      if (info->executable)
2164
        {
2165
          if (!add_dynamic_entry (DT_DEBUG, 0))
2166
            return FALSE;
2167
        }
2168
 
2169
      if (htab->splt->size != 0)
2170
        {
2171
          if (!add_dynamic_entry (DT_PLTGOT, 0)
2172
              || !add_dynamic_entry (DT_PLTRELSZ, 0)
2173
              || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2174
              || !add_dynamic_entry (DT_JMPREL, 0))
2175
            return FALSE;
2176
        }
2177
 
2178
      if (relocs)
2179
        {
2180
          if (!add_dynamic_entry (DT_RELA, 0)
2181
              || !add_dynamic_entry (DT_RELASZ, 0)
2182
              || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2183
            return FALSE;
2184
 
2185
          /* If any dynamic relocs apply to a read-only section,
2186
             then we need a DT_TEXTREL entry.  */
2187
          if ((info->flags & DF_TEXTREL) == 0)
2188
            elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2189
                                    (PTR) info);
2190
 
2191
          if ((info->flags & DF_TEXTREL) != 0)
2192
            {
2193
              if (!add_dynamic_entry (DT_TEXTREL, 0))
2194
                return FALSE;
2195
            }
2196
        }
2197
    }
2198
#undef add_dynamic_entry
2199
 
2200
  return TRUE;
2201
}
2202
 
2203
/* Return the base VMA address which should be subtracted from real addresses
2204
   when resolving @dtpoff relocation.
2205
   This is PT_TLS segment p_vaddr.  */
2206
 
2207
static bfd_vma
2208
dtpoff_base (info)
2209
     struct bfd_link_info *info;
2210
{
2211
  /* If tls_sec is NULL, we should have signalled an error already.  */
2212
  if (elf_hash_table (info)->tls_sec == NULL)
2213
    return 0;
2214
  return elf_hash_table (info)->tls_sec->vma;
2215
}
2216
 
2217
/* Return the relocation value for @tpoff relocation
2218
   if STT_TLS virtual address is ADDRESS.  */
2219
 
2220
static bfd_vma
2221
tpoff (info, address)
2222
     struct bfd_link_info *info;
2223
     bfd_vma address;
2224
{
2225
  struct elf_link_hash_table *htab = elf_hash_table (info);
2226
 
2227
  /* If tls_sec is NULL, we should have signalled an error already.  */
2228
  if (htab->tls_sec == NULL)
2229
    return 0;
2230
  return htab->tls_size + htab->tls_sec->vma - address;
2231
}
2232
 
2233
/* Complain if TLS instruction relocation is against an invalid
2234
   instruction.  */
2235
 
2236
static void
2237
invalid_tls_insn (input_bfd, input_section, rel)
2238
     bfd *input_bfd;
2239
     asection *input_section;
2240
     Elf_Internal_Rela *rel;
2241
{
2242
  reloc_howto_type *howto;
2243
 
2244
  howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2245
  (*_bfd_error_handler)
2246
    (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2247
     input_bfd,
2248
     input_section,
2249
     (long) rel->r_offset,
2250
     howto->name);
2251
  bfd_set_error (bfd_error_bad_value);
2252
}
2253
 
2254
/* Relocate a 390 ELF section.  */
2255
 
2256
static bfd_boolean
2257
elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2258
                              contents, relocs, local_syms, local_sections)
2259
     bfd *output_bfd;
2260
     struct bfd_link_info *info;
2261
     bfd *input_bfd;
2262
     asection *input_section;
2263
     bfd_byte *contents;
2264
     Elf_Internal_Rela *relocs;
2265
     Elf_Internal_Sym *local_syms;
2266
     asection **local_sections;
2267
{
2268
  struct elf_s390_link_hash_table *htab;
2269
  Elf_Internal_Shdr *symtab_hdr;
2270
  struct elf_link_hash_entry **sym_hashes;
2271
  bfd_vma *local_got_offsets;
2272
  Elf_Internal_Rela *rel;
2273
  Elf_Internal_Rela *relend;
2274
 
2275
  BFD_ASSERT (is_s390_elf (input_bfd));
2276
 
2277
  htab = elf_s390_hash_table (info);
2278
  symtab_hdr = &elf_symtab_hdr (input_bfd);
2279
  sym_hashes = elf_sym_hashes (input_bfd);
2280
  local_got_offsets = elf_local_got_offsets (input_bfd);
2281
 
2282
  rel = relocs;
2283
  relend = relocs + input_section->reloc_count;
2284
  for (; rel < relend; rel++)
2285
    {
2286
      unsigned int r_type;
2287
      reloc_howto_type *howto;
2288
      unsigned long r_symndx;
2289
      struct elf_link_hash_entry *h;
2290
      Elf_Internal_Sym *sym;
2291
      asection *sec;
2292
      bfd_vma off;
2293
      bfd_vma relocation;
2294
      bfd_boolean unresolved_reloc;
2295
      bfd_reloc_status_type r;
2296
      int tls_type;
2297
 
2298
      r_type = ELF32_R_TYPE (rel->r_info);
2299
      if (r_type == (int) R_390_GNU_VTINHERIT
2300
          || r_type == (int) R_390_GNU_VTENTRY)
2301
        continue;
2302
      if (r_type >= (int) R_390_max)
2303
        {
2304
          bfd_set_error (bfd_error_bad_value);
2305
          return FALSE;
2306
        }
2307
 
2308
      howto = elf_howto_table + r_type;
2309
      r_symndx = ELF32_R_SYM (rel->r_info);
2310
 
2311
      h = NULL;
2312
      sym = NULL;
2313
      sec = NULL;
2314
      unresolved_reloc = FALSE;
2315
      if (r_symndx < symtab_hdr->sh_info)
2316
        {
2317
          sym = local_syms + r_symndx;
2318
          sec = local_sections[r_symndx];
2319
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2320
        }
2321
      else
2322
        {
2323
          bfd_boolean warned ATTRIBUTE_UNUSED;
2324
 
2325
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2326
                                   r_symndx, symtab_hdr, sym_hashes,
2327
                                   h, sec, relocation,
2328
                                   unresolved_reloc, warned);
2329
        }
2330
 
2331
      if (sec != NULL && elf_discarded_section (sec))
2332
        {
2333
          /* For relocs against symbols from removed linkonce sections,
2334
             or sections discarded by a linker script, we just want the
2335
             section contents zeroed.  Avoid any special processing.  */
2336
          _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2337
          rel->r_info = 0;
2338
          rel->r_addend = 0;
2339
          continue;
2340
        }
2341
 
2342
      if (info->relocatable)
2343
        continue;
2344
 
2345
      switch (r_type)
2346
        {
2347
        case R_390_GOTPLT12:
2348
        case R_390_GOTPLT16:
2349
        case R_390_GOTPLT20:
2350
        case R_390_GOTPLT32:
2351
        case R_390_GOTPLTENT:
2352
          /* There are three cases for a GOTPLT relocation. 1) The
2353
             relocation is against the jump slot entry of a plt that
2354
             will get emitted to the output file. 2) The relocation
2355
             is against the jump slot of a plt entry that has been
2356
             removed. elf_s390_adjust_gotplt has created a GOT entry
2357
             as replacement. 3) The relocation is against a local symbol.
2358
             Cases 2) and 3) are the same as the GOT relocation code
2359
             so we just have to test for case 1 and fall through for
2360
             the other two.  */
2361
          if (h != NULL && h->plt.offset != (bfd_vma) -1)
2362
            {
2363
              bfd_vma plt_index;
2364
 
2365
              /* Calc. index no.
2366
                 Current offset - size first entry / entry size.  */
2367
              plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2368
                PLT_ENTRY_SIZE;
2369
 
2370
              /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2371
                 addr & GOT addr.  */
2372
              relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2373
              unresolved_reloc = FALSE;
2374
 
2375
              if (r_type == R_390_GOTPLTENT)
2376
                relocation += htab->sgot->output_section->vma;
2377
              break;
2378
            }
2379
          /* Fall through.  */
2380
 
2381
        case R_390_GOT12:
2382
        case R_390_GOT16:
2383
        case R_390_GOT20:
2384
        case R_390_GOT32:
2385
        case R_390_GOTENT:
2386
          /* Relocation is to the entry for this symbol in the global
2387
             offset table.  */
2388
          if (htab->sgot == NULL)
2389
            abort ();
2390
 
2391
          if (h != NULL)
2392
            {
2393
              bfd_boolean dyn;
2394
 
2395
              off = h->got.offset;
2396
              dyn = htab->elf.dynamic_sections_created;
2397
              if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2398
                  || (info->shared
2399
                      && (info->symbolic
2400
                          || h->dynindx == -1
2401
                          || h->forced_local)
2402
                      && h->def_regular)
2403
                  || (ELF_ST_VISIBILITY (h->other)
2404
                      && h->root.type == bfd_link_hash_undefweak))
2405
                {
2406
                  /* This is actually a static link, or it is a
2407
                     -Bsymbolic link and the symbol is defined
2408
                     locally, or the symbol was forced to be local
2409
                     because of a version file.  We must initialize
2410
                     this entry in the global offset table.  Since the
2411
                     offset must always be a multiple of 2, we use the
2412
                     least significant bit to record whether we have
2413
                     initialized it already.
2414
 
2415
                     When doing a dynamic link, we create a .rel.got
2416
                     relocation entry to initialize the value.  This
2417
                     is done in the finish_dynamic_symbol routine.  */
2418
                  if ((off & 1) != 0)
2419
                    off &= ~1;
2420
                  else
2421
                    {
2422
                      bfd_put_32 (output_bfd, relocation,
2423
                                  htab->sgot->contents + off);
2424
                      h->got.offset |= 1;
2425
                    }
2426
                }
2427
              else
2428
                unresolved_reloc = FALSE;
2429
            }
2430
          else
2431
            {
2432
              if (local_got_offsets == NULL)
2433
                abort ();
2434
 
2435
              off = local_got_offsets[r_symndx];
2436
 
2437
              /* The offset must always be a multiple of 4.  We use
2438
                 the least significant bit to record whether we have
2439
                 already generated the necessary reloc.  */
2440
              if ((off & 1) != 0)
2441
                off &= ~1;
2442
              else
2443
                {
2444
                  bfd_put_32 (output_bfd, relocation,
2445
                              htab->sgot->contents + off);
2446
 
2447
                  if (info->shared)
2448
                    {
2449
                      asection *srelgot;
2450
                      Elf_Internal_Rela outrel;
2451
                      bfd_byte *loc;
2452
 
2453
                      srelgot = htab->srelgot;
2454
                      if (srelgot == NULL)
2455
                        abort ();
2456
 
2457
                      outrel.r_offset = (htab->sgot->output_section->vma
2458
                                         + htab->sgot->output_offset
2459
                                         + off);
2460
                      outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2461
                      outrel.r_addend = relocation;
2462
                      loc = srelgot->contents;
2463
                      loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2464
                      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2465
                    }
2466
 
2467
                  local_got_offsets[r_symndx] |= 1;
2468
                }
2469
            }
2470
 
2471
          if (off >= (bfd_vma) -2)
2472
            abort ();
2473
 
2474
          relocation = htab->sgot->output_offset + off;
2475
 
2476
          /* For @GOTENT the relocation is against the offset between
2477
             the instruction and the symbols entry in the GOT and not
2478
             between the start of the GOT and the symbols entry. We
2479
             add the vma of the GOT to get the correct value.  */
2480
          if (   r_type == R_390_GOTENT
2481
              || r_type == R_390_GOTPLTENT)
2482
            relocation += htab->sgot->output_section->vma;
2483
 
2484
          break;
2485
 
2486
        case R_390_GOTOFF16:
2487
        case R_390_GOTOFF32:
2488
          /* Relocation is relative to the start of the global offset
2489
             table.  */
2490
 
2491
          /* Note that sgot->output_offset is not involved in this
2492
             calculation.  We always want the start of .got.  If we
2493
             defined _GLOBAL_OFFSET_TABLE in a different way, as is
2494
             permitted by the ABI, we might have to change this
2495
             calculation.  */
2496
          relocation -= htab->sgot->output_section->vma;
2497
          break;
2498
 
2499
        case R_390_GOTPC:
2500
        case R_390_GOTPCDBL:
2501
          /* Use global offset table as symbol value.  */
2502
          relocation = htab->sgot->output_section->vma;
2503
          unresolved_reloc = FALSE;
2504
          break;
2505
 
2506
        case R_390_PLT16DBL:
2507
        case R_390_PLT32DBL:
2508
        case R_390_PLT32:
2509
          /* Relocation is to the entry for this symbol in the
2510
             procedure linkage table.  */
2511
 
2512
          /* Resolve a PLT32 reloc against a local symbol directly,
2513
             without using the procedure linkage table.  */
2514
          if (h == NULL)
2515
            break;
2516
 
2517
          if (h->plt.offset == (bfd_vma) -1
2518
              || htab->splt == NULL)
2519
            {
2520
              /* We didn't make a PLT entry for this symbol.  This
2521
                 happens when statically linking PIC code, or when
2522
                 using -Bsymbolic.  */
2523
              break;
2524
            }
2525
 
2526
          relocation = (htab->splt->output_section->vma
2527
                        + htab->splt->output_offset
2528
                        + h->plt.offset);
2529
          unresolved_reloc = FALSE;
2530
          break;
2531
 
2532
        case R_390_PLTOFF16:
2533
        case R_390_PLTOFF32:
2534
          /* Relocation is to the entry for this symbol in the
2535
             procedure linkage table relative to the start of the GOT.  */
2536
 
2537
          /* For local symbols or if we didn't make a PLT entry for
2538
             this symbol resolve the symbol directly.  */
2539
          if (   h == NULL
2540
              || h->plt.offset == (bfd_vma) -1
2541
              || htab->splt == NULL)
2542
            {
2543
              relocation -= htab->sgot->output_section->vma;
2544
              break;
2545
            }
2546
 
2547
          relocation = (htab->splt->output_section->vma
2548
                        + htab->splt->output_offset
2549
                        + h->plt.offset
2550
                        - htab->sgot->output_section->vma);
2551
          unresolved_reloc = FALSE;
2552
          break;
2553
 
2554
        case R_390_8:
2555
        case R_390_16:
2556
        case R_390_32:
2557
        case R_390_PC16:
2558
        case R_390_PC16DBL:
2559
        case R_390_PC32DBL:
2560
        case R_390_PC32:
2561
          if ((input_section->flags & SEC_ALLOC) == 0)
2562
            break;
2563
 
2564
          if ((info->shared
2565
               && (h == NULL
2566
                   || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2567
                   || h->root.type != bfd_link_hash_undefweak)
2568
               && ((r_type != R_390_PC16
2569
                    && r_type != R_390_PC16DBL
2570
                    && r_type != R_390_PC32DBL
2571
                    && r_type != R_390_PC32)
2572
                   || (h != NULL
2573
                       && !SYMBOL_REFERENCES_LOCAL (info, h))))
2574
              || (ELIMINATE_COPY_RELOCS
2575
                  && !info->shared
2576
                  && h != NULL
2577
                  && h->dynindx != -1
2578
                  && !h->non_got_ref
2579
                  && ((h->def_dynamic
2580
                       && !h->def_regular)
2581
                      || h->root.type == bfd_link_hash_undefweak
2582
                      || h->root.type == bfd_link_hash_undefined)))
2583
            {
2584
              Elf_Internal_Rela outrel;
2585
              bfd_boolean skip, relocate;
2586
              asection *sreloc;
2587
              bfd_byte *loc;
2588
 
2589
              /* When generating a shared object, these relocations
2590
                 are copied into the output file to be resolved at run
2591
                 time.  */
2592
 
2593
              skip = FALSE;
2594
              relocate = FALSE;
2595
 
2596
              outrel.r_offset =
2597
                _bfd_elf_section_offset (output_bfd, info, input_section,
2598
                                         rel->r_offset);
2599
              if (outrel.r_offset == (bfd_vma) -1)
2600
                skip = TRUE;
2601
              else if (outrel.r_offset == (bfd_vma) -2)
2602
                skip = TRUE, relocate = TRUE;
2603
              outrel.r_offset += (input_section->output_section->vma
2604
                                  + input_section->output_offset);
2605
 
2606
              if (skip)
2607
                memset (&outrel, 0, sizeof outrel);
2608
              else if (h != NULL
2609
                       && h->dynindx != -1
2610
                       && (r_type == R_390_PC16
2611
                           || r_type == R_390_PC16DBL
2612
                           || r_type == R_390_PC32DBL
2613
                           || r_type == R_390_PC32
2614
                           || !info->shared
2615
                           || !info->symbolic
2616
                           || !h->def_regular))
2617
                {
2618
                  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2619
                  outrel.r_addend = rel->r_addend;
2620
                }
2621
              else
2622
                {
2623
                  /* This symbol is local, or marked to become local.  */
2624
                  outrel.r_addend = relocation + rel->r_addend;
2625
                  if (r_type == R_390_32)
2626
                    {
2627
                      relocate = TRUE;
2628
                      outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2629
                    }
2630
                  else
2631
                    {
2632
                      long sindx;
2633
 
2634
                      if (bfd_is_abs_section (sec))
2635
                        sindx = 0;
2636
                      else if (sec == NULL || sec->owner == NULL)
2637
                        {
2638
                          bfd_set_error(bfd_error_bad_value);
2639
                          return FALSE;
2640
                        }
2641
                      else
2642
                        {
2643
                          asection *osec;
2644
 
2645
                          osec = sec->output_section;
2646
                          sindx = elf_section_data (osec)->dynindx;
2647
                          if (sindx == 0)
2648
                            {
2649
                              osec = htab->elf.text_index_section;
2650
                              sindx = elf_section_data (osec)->dynindx;
2651
                            }
2652
                          BFD_ASSERT (sindx != 0);
2653
 
2654
                          /* We are turning this relocation into one
2655
                             against a section symbol, so subtract out
2656
                             the output section's address but not the
2657
                             offset of the input section in the output
2658
                             section.  */
2659
                          outrel.r_addend -= osec->vma;
2660
                        }
2661
                      outrel.r_info = ELF32_R_INFO (sindx, r_type);
2662
                    }
2663
                }
2664
 
2665
              sreloc = elf_section_data (input_section)->sreloc;
2666
              if (sreloc == NULL)
2667
                abort ();
2668
 
2669
              loc = sreloc->contents;
2670
              loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2671
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2672
 
2673
              /* If this reloc is against an external symbol, we do
2674
                 not want to fiddle with the addend.  Otherwise, we
2675
                 need to include the symbol value so that it becomes
2676
                 an addend for the dynamic reloc.  */
2677
              if (! relocate)
2678
                continue;
2679
            }
2680
          break;
2681
 
2682
          /* Relocations for tls literal pool entries.  */
2683
        case R_390_TLS_IE32:
2684
          if (info->shared)
2685
            {
2686
              Elf_Internal_Rela outrel;
2687
              asection *sreloc;
2688
              bfd_byte *loc;
2689
 
2690
              outrel.r_offset = rel->r_offset
2691
                                + input_section->output_section->vma
2692
                                + input_section->output_offset;
2693
              outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2694
              sreloc = elf_section_data (input_section)->sreloc;
2695
              if (sreloc == NULL)
2696
                abort ();
2697
              loc = sreloc->contents;
2698
              loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2699
              bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2700
            }
2701
          /* Fall through.  */
2702
 
2703
        case R_390_TLS_GD32:
2704
        case R_390_TLS_GOTIE32:
2705
          r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2706
          tls_type = GOT_UNKNOWN;
2707
          if (h == NULL && local_got_offsets)
2708
            tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2709
          else if (h != NULL)
2710
            {
2711
              tls_type = elf_s390_hash_entry(h)->tls_type;
2712
              if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2713
                r_type = R_390_TLS_LE32;
2714
            }
2715
          if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2716
            r_type = R_390_TLS_IE32;
2717
 
2718
          if (r_type == R_390_TLS_LE32)
2719
            {
2720
              /* This relocation gets optimized away by the local exec
2721
                 access optimization.  */
2722
              BFD_ASSERT (! unresolved_reloc);
2723
              bfd_put_32 (output_bfd, -tpoff (info, relocation),
2724
                          contents + rel->r_offset);
2725
              continue;
2726
            }
2727
 
2728
          if (htab->sgot == NULL)
2729
            abort ();
2730
 
2731
          if (h != NULL)
2732
            off = h->got.offset;
2733
          else
2734
            {
2735
              if (local_got_offsets == NULL)
2736
                abort ();
2737
 
2738
              off = local_got_offsets[r_symndx];
2739
            }
2740
 
2741
        emit_tls_relocs:
2742
 
2743
          if ((off & 1) != 0)
2744
            off &= ~1;
2745
          else
2746
            {
2747
              Elf_Internal_Rela outrel;
2748
              bfd_byte *loc;
2749
              int dr_type, indx;
2750
 
2751
              if (htab->srelgot == NULL)
2752
                abort ();
2753
 
2754
              outrel.r_offset = (htab->sgot->output_section->vma
2755
                                 + htab->sgot->output_offset + off);
2756
 
2757
              indx = h && h->dynindx != -1 ? h->dynindx : 0;
2758
              if (r_type == R_390_TLS_GD32)
2759
                dr_type = R_390_TLS_DTPMOD;
2760
              else
2761
                dr_type = R_390_TLS_TPOFF;
2762
              if (dr_type == R_390_TLS_TPOFF && indx == 0)
2763
                outrel.r_addend = relocation - dtpoff_base (info);
2764
              else
2765
                outrel.r_addend = 0;
2766
              outrel.r_info = ELF32_R_INFO (indx, dr_type);
2767
              loc = htab->srelgot->contents;
2768
              loc += htab->srelgot->reloc_count++
2769
                * sizeof (Elf32_External_Rela);
2770
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2771
 
2772
              if (r_type == R_390_TLS_GD32)
2773
                {
2774
                  if (indx == 0)
2775
                    {
2776
                      BFD_ASSERT (! unresolved_reloc);
2777
                      bfd_put_32 (output_bfd,
2778
                                  relocation - dtpoff_base (info),
2779
                                  htab->sgot->contents + off + GOT_ENTRY_SIZE);
2780
                    }
2781
                  else
2782
                    {
2783
                      outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2784
                      outrel.r_offset += GOT_ENTRY_SIZE;
2785
                      outrel.r_addend = 0;
2786
                      htab->srelgot->reloc_count++;
2787
                      loc += sizeof (Elf32_External_Rela);
2788
                      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2789
                    }
2790
                }
2791
 
2792
              if (h != NULL)
2793
                h->got.offset |= 1;
2794
              else
2795
                local_got_offsets[r_symndx] |= 1;
2796
            }
2797
 
2798
          if (off >= (bfd_vma) -2)
2799
            abort ();
2800
          if (r_type == ELF32_R_TYPE (rel->r_info))
2801
            {
2802
              relocation = htab->sgot->output_offset + off;
2803
              if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2804
                relocation += htab->sgot->output_section->vma;
2805
              unresolved_reloc = FALSE;
2806
            }
2807
          else
2808
            {
2809
              bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2810
                          contents + rel->r_offset);
2811
              continue;
2812
            }
2813
          break;
2814
 
2815
        case R_390_TLS_GOTIE12:
2816
        case R_390_TLS_GOTIE20:
2817
        case R_390_TLS_IEENT:
2818
          if (h == NULL)
2819
            {
2820
              if (local_got_offsets == NULL)
2821
                abort();
2822
              off = local_got_offsets[r_symndx];
2823
              if (info->shared)
2824
                goto emit_tls_relocs;
2825
            }
2826
          else
2827
            {
2828
              off = h->got.offset;
2829
              tls_type = elf_s390_hash_entry(h)->tls_type;
2830
              if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2831
                goto emit_tls_relocs;
2832
            }
2833
 
2834
          if (htab->sgot == NULL)
2835
            abort ();
2836
 
2837
          BFD_ASSERT (! unresolved_reloc);
2838
          bfd_put_32 (output_bfd, -tpoff (info, relocation),
2839
                      htab->sgot->contents + off);
2840
          relocation = htab->sgot->output_offset + off;
2841
          if (r_type == R_390_TLS_IEENT)
2842
            relocation += htab->sgot->output_section->vma;
2843
          unresolved_reloc = FALSE;
2844
          break;
2845
 
2846
        case R_390_TLS_LDM32:
2847
          if (! info->shared)
2848
            /* The literal pool entry this relocation refers to gets ignored
2849
               by the optimized code of the local exec model. Do nothing
2850
               and the value will turn out zero.  */
2851
            continue;
2852
 
2853
          if (htab->sgot == NULL)
2854
            abort ();
2855
 
2856
          off = htab->tls_ldm_got.offset;
2857
          if (off & 1)
2858
            off &= ~1;
2859
          else
2860
            {
2861
              Elf_Internal_Rela outrel;
2862
              bfd_byte *loc;
2863
 
2864
              if (htab->srelgot == NULL)
2865
                abort ();
2866
 
2867
              outrel.r_offset = (htab->sgot->output_section->vma
2868
                                 + htab->sgot->output_offset + off);
2869
 
2870
              bfd_put_32 (output_bfd, 0,
2871
                          htab->sgot->contents + off + GOT_ENTRY_SIZE);
2872
              outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2873
              outrel.r_addend = 0;
2874
              loc = htab->srelgot->contents;
2875
              loc += htab->srelgot->reloc_count++
2876
                * sizeof (Elf32_External_Rela);
2877
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2878
              htab->tls_ldm_got.offset |= 1;
2879
            }
2880
          relocation = htab->sgot->output_offset + off;
2881
          unresolved_reloc = FALSE;
2882
          break;
2883
 
2884
        case R_390_TLS_LE32:
2885
          if (info->shared)
2886
            {
2887
              /* Linking a shared library with non-fpic code requires
2888
                 a R_390_TLS_TPOFF relocation.  */
2889
              Elf_Internal_Rela outrel;
2890
              asection *sreloc;
2891
              bfd_byte *loc;
2892
              int indx;
2893
 
2894
              outrel.r_offset = rel->r_offset
2895
                                + input_section->output_section->vma
2896
                                + input_section->output_offset;
2897
              if (h != NULL && h->dynindx != -1)
2898
                indx = h->dynindx;
2899
              else
2900
                indx = 0;
2901
              outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2902
              if (indx == 0)
2903
                outrel.r_addend = relocation - dtpoff_base (info);
2904
              else
2905
                outrel.r_addend = 0;
2906
              sreloc = elf_section_data (input_section)->sreloc;
2907
              if (sreloc == NULL)
2908
                abort ();
2909
              loc = sreloc->contents;
2910
              loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2911
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2912
            }
2913
          else
2914
            {
2915
              BFD_ASSERT (! unresolved_reloc);
2916
              bfd_put_32 (output_bfd, -tpoff (info, relocation),
2917
                          contents + rel->r_offset);
2918
            }
2919
          continue;
2920
 
2921
        case R_390_TLS_LDO32:
2922
          if (info->shared)
2923
            relocation -= dtpoff_base (info);
2924
          else
2925
            /* When converting LDO to LE, we must negate.  */
2926
            relocation = -tpoff (info, relocation);
2927
          break;
2928
 
2929
          /* Relocations for tls instructions.  */
2930
        case R_390_TLS_LOAD:
2931
        case R_390_TLS_GDCALL:
2932
        case R_390_TLS_LDCALL:
2933
          tls_type = GOT_UNKNOWN;
2934
          if (h == NULL && local_got_offsets)
2935
            tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2936
          else if (h != NULL)
2937
            tls_type = elf_s390_hash_entry(h)->tls_type;
2938
 
2939
          if (tls_type == GOT_TLS_GD)
2940
            continue;
2941
 
2942
          if (r_type == R_390_TLS_LOAD)
2943
            {
2944
              if (!info->shared && (h == NULL || h->dynindx == -1))
2945
                {
2946
                  /* IE->LE transition. Four valid cases:
2947
                     l %rx,0(0,%ry)    -> lr %rx,%ry + bcr 0,0
2948
                     l %rx,0(%ry,0)    -> lr %rx,%ry + bcr 0,0
2949
                     l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2950
                     l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2951
                  unsigned int insn, ry;
2952
 
2953
                  insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2954
                  ry = 0;
2955
                  if ((insn & 0xff00f000) == 0x58000000)
2956
                    /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0  */
2957
                    ry = (insn & 0x000f0000);
2958
                  else if ((insn & 0xff0f0000) == 0x58000000)
2959
                    /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0  */
2960
                    ry = (insn & 0x0000f000) << 4;
2961
                  else if ((insn & 0xff00f000) == 0x5800c000)
2962
                    /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0  */
2963
                    ry = (insn & 0x000f0000);
2964
                  else if ((insn & 0xff0f0000) == 0x580c0000)
2965
                    /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0  */
2966
                    ry = (insn & 0x0000f000) << 4;
2967
                  else
2968
                    invalid_tls_insn (input_bfd, input_section, rel);
2969
                  insn = 0x18000700 | (insn & 0x00f00000) | ry;
2970
                  bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2971
                }
2972
            }
2973
          else if (r_type == R_390_TLS_GDCALL)
2974
            {
2975
              unsigned int insn;
2976
 
2977
              insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2978
              if ((insn & 0xff000fff) != 0x4d000000 &&
2979
                  (insn & 0xffff0000) != 0xc0e50000)
2980
                invalid_tls_insn (input_bfd, input_section, rel);
2981
              if (!info->shared && (h == NULL || h->dynindx == -1))
2982
                {
2983
                  if ((insn & 0xff000000) == 0x4d000000)
2984
                    {
2985
                      /* GD->LE transition.
2986
                         bas %r14,0(%rx,%r13) -> bc 0,0  */
2987
                      insn = 0x47000000;
2988
                    }
2989
                  else
2990
                    {
2991
                      /* GD->LE transition.
2992
                         brasl %r14,_tls_get_addr@plt -> brcl 0,.  */
2993
                      insn = 0xc0040000;
2994
                      bfd_put_16 (output_bfd, 0x0000,
2995
                                  contents + rel->r_offset + 4);
2996
                    }
2997
                }
2998
              else
2999
                {
3000
                  if ((insn & 0xff000000) == 0x4d000000)
3001
                    {
3002
                      /* GD->IE transition.
3003
                         bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12)  */
3004
                      insn = 0x5822c000;
3005
                    }
3006
                  else
3007
                    {
3008
                      /* GD->IE transition.
3009
                         brasl %r14,__tls_get_addr@plt ->
3010
                                l %r2,0(%r2,%r12) ; bcr 0,0 */
3011
                      insn = 0x5822c000;
3012
                      bfd_put_16 (output_bfd, 0x0700,
3013
                                  contents + rel->r_offset + 4);
3014
                    }
3015
                }
3016
              bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3017
            }
3018
          else if (r_type == R_390_TLS_LDCALL)
3019
            {
3020
              if (!info->shared)
3021
                {
3022
                  unsigned int insn;
3023
 
3024
                  insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3025
                  if ((insn & 0xff000fff) != 0x4d000000 &&
3026
                      (insn & 0xffff0000) != 0xc0e50000)
3027
                    invalid_tls_insn (input_bfd, input_section, rel);
3028
                  if ((insn & 0xff000000) == 0x4d000000)
3029
                    {
3030
                      /* LD->LE transition.
3031
                         bas %r14,0(%rx,%r13) -> bc 0,0  */
3032
                      insn = 0x47000000;
3033
                    }
3034
                  else
3035
                    {
3036
                      /* LD->LE transition.
3037
                         brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3038
                      insn = 0xc0040000;
3039
                      bfd_put_16 (output_bfd, 0x0000,
3040
                                  contents + rel->r_offset + 4);
3041
                    }
3042
                  bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3043
                }
3044
            }
3045
          continue;
3046
 
3047
        default:
3048
          break;
3049
        }
3050
 
3051
      /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3052
         because such sections are not SEC_ALLOC and thus ld.so will
3053
         not process them.  */
3054
      if (unresolved_reloc
3055
          && !((input_section->flags & SEC_DEBUGGING) != 0
3056
               && h->def_dynamic))
3057
        (*_bfd_error_handler)
3058
          (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3059
           input_bfd,
3060
           input_section,
3061
           (long) rel->r_offset,
3062
           howto->name,
3063
           h->root.root.string);
3064
 
3065
      if (r_type == R_390_20
3066
          || r_type == R_390_GOT20
3067
          || r_type == R_390_GOTPLT20
3068
          || r_type == R_390_TLS_GOTIE20)
3069
        {
3070
          relocation += rel->r_addend;
3071
          relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3072
          r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3073
                                        contents, rel->r_offset,
3074
                                        relocation, 0);
3075
        }
3076
      else
3077
        r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3078
                                      contents, rel->r_offset,
3079
                                      relocation, rel->r_addend);
3080
 
3081
      if (r != bfd_reloc_ok)
3082
        {
3083
          const char *name;
3084
 
3085
          if (h != NULL)
3086
            name = h->root.root.string;
3087
          else
3088
            {
3089
              name = bfd_elf_string_from_elf_section (input_bfd,
3090
                                                      symtab_hdr->sh_link,
3091
                                                      sym->st_name);
3092
              if (name == NULL)
3093
                return FALSE;
3094
              if (*name == '\0')
3095
                name = bfd_section_name (input_bfd, sec);
3096
            }
3097
 
3098
          if (r == bfd_reloc_overflow)
3099
            {
3100
 
3101
              if (! ((*info->callbacks->reloc_overflow)
3102
                     (info, (h ? &h->root : NULL), name, howto->name,
3103
                      (bfd_vma) 0, input_bfd, input_section,
3104
                      rel->r_offset)))
3105
                return FALSE;
3106
            }
3107
          else
3108
            {
3109
              (*_bfd_error_handler)
3110
                (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3111
                 input_bfd, input_section,
3112
                 (long) rel->r_offset, name, (int) r);
3113
              return FALSE;
3114
            }
3115
        }
3116
    }
3117
 
3118
  return TRUE;
3119
}
3120
 
3121
/* Finish up dynamic symbol handling.  We set the contents of various
3122
   dynamic sections here.  */
3123
 
3124
static bfd_boolean
3125
elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3126
     bfd *output_bfd;
3127
     struct bfd_link_info *info;
3128
     struct elf_link_hash_entry *h;
3129
     Elf_Internal_Sym *sym;
3130
{
3131
  struct elf_s390_link_hash_table *htab;
3132
 
3133
  htab = elf_s390_hash_table (info);
3134
 
3135
  if (h->plt.offset != (bfd_vma) -1)
3136
    {
3137
      bfd_vma plt_index;
3138
      bfd_vma got_offset;
3139
      Elf_Internal_Rela rela;
3140
      bfd_byte *loc;
3141
      bfd_vma relative_offset;
3142
 
3143
      /* This symbol has an entry in the procedure linkage table.  Set
3144
         it up.  */
3145
      if (h->dynindx == -1
3146
          || htab->splt == NULL
3147
          || htab->sgotplt == NULL
3148
          || htab->srelplt == NULL)
3149
        abort ();
3150
 
3151
      /* Calc. index no.
3152
         Current offset - size first entry / entry size.  */
3153
      plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3154
 
3155
      /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3156
         addr & GOT addr.  */
3157
      got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3158
 
3159
      /* S390 uses halfwords for relative branch calc!  */
3160
      relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3161
                            (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3162
      /* If offset is > 32768, branch to a previous branch
3163
         390 can only handle +-64 K jumps.  */
3164
      if ( -32768 > (int) relative_offset )
3165
        relative_offset
3166
          = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3167
 
3168
      /* Fill in the entry in the procedure linkage table.  */
3169
      if (!info->shared)
3170
        {
3171
          bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3172
                      htab->splt->contents + h->plt.offset);
3173
          bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3174
                      htab->splt->contents + h->plt.offset + 4);
3175
          bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3176
                      htab->splt->contents + h->plt.offset + 8);
3177
          bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3178
                      htab->splt->contents + h->plt.offset + 12);
3179
          bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3180
                      htab->splt->contents + h->plt.offset + 16);
3181
          bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3182
                      htab->splt->contents + h->plt.offset + 20);
3183
          bfd_put_32 (output_bfd,
3184
                      (htab->sgotplt->output_section->vma
3185
                       + htab->sgotplt->output_offset
3186
                       + got_offset),
3187
                      htab->splt->contents + h->plt.offset + 24);
3188
        }
3189
      else if (got_offset < 4096)
3190
        {
3191
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3192
                      htab->splt->contents + h->plt.offset);
3193
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3194
                      htab->splt->contents + h->plt.offset + 4);
3195
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3196
                      htab->splt->contents + h->plt.offset + 8);
3197
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3198
                      htab->splt->contents + h->plt.offset + 12);
3199
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3200
                      htab->splt->contents + h->plt.offset + 16);
3201
          bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3202
                      htab->splt->contents + h->plt.offset + 20);
3203
          bfd_put_32 (output_bfd, (bfd_vma) 0,
3204
                      htab->splt->contents + h->plt.offset + 24);
3205
        }
3206
      else if (got_offset < 32768)
3207
        {
3208
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3209
                      htab->splt->contents + h->plt.offset);
3210
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3211
                      htab->splt->contents + h->plt.offset + 4);
3212
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3213
                      htab->splt->contents + h->plt.offset + 8);
3214
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3215
                      htab->splt->contents + h->plt.offset + 12);
3216
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3217
                      htab->splt->contents + h->plt.offset + 16);
3218
          bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3219
                      htab->splt->contents + h->plt.offset + 20);
3220
          bfd_put_32 (output_bfd, (bfd_vma) 0,
3221
                      htab->splt->contents + h->plt.offset + 24);
3222
        }
3223
      else
3224
        {
3225
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3226
                      htab->splt->contents + h->plt.offset);
3227
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3228
                      htab->splt->contents + h->plt.offset + 4);
3229
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3230
                      htab->splt->contents + h->plt.offset + 8);
3231
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3232
                      htab->splt->contents + h->plt.offset + 12);
3233
          bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3234
                      htab->splt->contents + h->plt.offset + 16);
3235
          bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3236
                      htab->splt->contents + h->plt.offset + 20);
3237
          bfd_put_32 (output_bfd, got_offset,
3238
                      htab->splt->contents + h->plt.offset + 24);
3239
        }
3240
      /* Insert offset into  reloc. table here.  */
3241
      bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3242
                  htab->splt->contents + h->plt.offset + 28);
3243
 
3244
      /* Fill in the entry in the global offset table.
3245
         Points to instruction after GOT offset.  */
3246
      bfd_put_32 (output_bfd,
3247
                  (htab->splt->output_section->vma
3248
                   + htab->splt->output_offset
3249
                   + h->plt.offset
3250
                   + 12),
3251
                  htab->sgotplt->contents + got_offset);
3252
 
3253
      /* Fill in the entry in the .rela.plt section.  */
3254
      rela.r_offset = (htab->sgotplt->output_section->vma
3255
                       + htab->sgotplt->output_offset
3256
                       + got_offset);
3257
      rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3258
      rela.r_addend = 0;
3259
      loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3260
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3261
 
3262
      if (!h->def_regular)
3263
        {
3264
          /* Mark the symbol as undefined, rather than as defined in
3265
             the .plt section.  Leave the value alone.  This is a clue
3266
             for the dynamic linker, to make function pointer
3267
             comparisons work between an application and shared
3268
             library.  */
3269
          sym->st_shndx = SHN_UNDEF;
3270
        }
3271
    }
3272
 
3273
  if (h->got.offset != (bfd_vma) -1
3274
      && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3275
      && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3276
      && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3277
    {
3278
      Elf_Internal_Rela rela;
3279
      bfd_byte *loc;
3280
 
3281
      /* This symbol has an entry in the global offset table.  Set it
3282
         up.  */
3283
 
3284
      if (htab->sgot == NULL || htab->srelgot == NULL)
3285
        abort ();
3286
 
3287
      rela.r_offset = (htab->sgot->output_section->vma
3288
                       + htab->sgot->output_offset
3289
                       + (h->got.offset &~ (bfd_vma) 1));
3290
 
3291
      /* If this is a static link, or it is a -Bsymbolic link and the
3292
         symbol is defined locally or was forced to be local because
3293
         of a version file, we just want to emit a RELATIVE reloc.
3294
         The entry in the global offset table will already have been
3295
         initialized in the relocate_section function.  */
3296
      if (info->shared
3297
          && (info->symbolic
3298
              || h->dynindx == -1
3299
              || h->forced_local)
3300
          && h->def_regular)
3301
        {
3302
          BFD_ASSERT((h->got.offset & 1) != 0);
3303
          rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3304
          rela.r_addend = (h->root.u.def.value
3305
                           + h->root.u.def.section->output_section->vma
3306
                           + h->root.u.def.section->output_offset);
3307
        }
3308
      else
3309
        {
3310
          BFD_ASSERT((h->got.offset & 1) == 0);
3311
          bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3312
          rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3313
          rela.r_addend = 0;
3314
        }
3315
 
3316
      loc = htab->srelgot->contents;
3317
      loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3318
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3319
    }
3320
 
3321
  if (h->needs_copy)
3322
    {
3323
      Elf_Internal_Rela rela;
3324
      bfd_byte *loc;
3325
 
3326
      /* This symbols needs a copy reloc.  Set it up.  */
3327
 
3328
      if (h->dynindx == -1
3329
          || (h->root.type != bfd_link_hash_defined
3330
              && h->root.type != bfd_link_hash_defweak)
3331
          || htab->srelbss == NULL)
3332
        abort ();
3333
 
3334
      rela.r_offset = (h->root.u.def.value
3335
                       + h->root.u.def.section->output_section->vma
3336
                       + h->root.u.def.section->output_offset);
3337
      rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3338
      rela.r_addend = 0;
3339
      loc = htab->srelbss->contents;
3340
      loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3341
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3342
    }
3343
 
3344
  /* Mark some specially defined symbols as absolute.  */
3345
  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3346
      || h == htab->elf.hgot
3347
      || h == htab->elf.hplt)
3348
    sym->st_shndx = SHN_ABS;
3349
 
3350
  return TRUE;
3351
}
3352
 
3353
/* Used to decide how to sort relocs in an optimal manner for the
3354
   dynamic linker, before writing them out.  */
3355
 
3356
static enum elf_reloc_type_class
3357
elf_s390_reloc_type_class (rela)
3358
     const Elf_Internal_Rela *rela;
3359
{
3360
  switch ((int) ELF32_R_TYPE (rela->r_info))
3361
    {
3362
    case R_390_RELATIVE:
3363
      return reloc_class_relative;
3364
    case R_390_JMP_SLOT:
3365
      return reloc_class_plt;
3366
    case R_390_COPY:
3367
      return reloc_class_copy;
3368
    default:
3369
      return reloc_class_normal;
3370
    }
3371
}
3372
 
3373
/* Finish up the dynamic sections.  */
3374
 
3375
static bfd_boolean
3376
elf_s390_finish_dynamic_sections (output_bfd, info)
3377
     bfd *output_bfd;
3378
     struct bfd_link_info *info;
3379
{
3380
  struct elf_s390_link_hash_table *htab;
3381
  bfd *dynobj;
3382
  asection *sdyn;
3383
 
3384
  htab = elf_s390_hash_table (info);
3385
  dynobj = htab->elf.dynobj;
3386
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3387
 
3388
  if (htab->elf.dynamic_sections_created)
3389
    {
3390
      Elf32_External_Dyn *dyncon, *dynconend;
3391
 
3392
      if (sdyn == NULL || htab->sgot == NULL)
3393
        abort ();
3394
 
3395
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
3396
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3397
      for (; dyncon < dynconend; dyncon++)
3398
        {
3399
          Elf_Internal_Dyn dyn;
3400
          asection *s;
3401
 
3402
          bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3403
 
3404
          switch (dyn.d_tag)
3405
            {
3406
            default:
3407
              continue;
3408
 
3409
            case DT_PLTGOT:
3410
              dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3411
              break;
3412
 
3413
            case DT_JMPREL:
3414
              dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3415
              break;
3416
 
3417
            case DT_PLTRELSZ:
3418
              s = htab->srelplt->output_section;
3419
              dyn.d_un.d_val = s->size;
3420
              break;
3421
            }
3422
 
3423
          bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3424
        }
3425
 
3426
      /* Fill in the special first entry in the procedure linkage table.  */
3427
      if (htab->splt && htab->splt->size > 0)
3428
        {
3429
          memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3430
          if (info->shared)
3431
            {
3432
              bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3433
                          htab->splt->contents );
3434
              bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3435
                          htab->splt->contents +4 );
3436
              bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3437
                          htab->splt->contents +8 );
3438
              bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3439
                          htab->splt->contents +12 );
3440
              bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3441
                          htab->splt->contents +16 );
3442
           }
3443
          else
3444
           {
3445
              bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3446
                          htab->splt->contents );
3447
              bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3448
                          htab->splt->contents +4 );
3449
              bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3450
                          htab->splt->contents +8 );
3451
              bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3452
                          htab->splt->contents +12 );
3453
              bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3454
                          htab->splt->contents +16 );
3455
              bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3456
                          htab->splt->contents +20 );
3457
              bfd_put_32 (output_bfd,
3458
                          htab->sgotplt->output_section->vma
3459
                          + htab->sgotplt->output_offset,
3460
                          htab->splt->contents + 24);
3461
           }
3462
          elf_section_data (htab->splt->output_section)
3463
            ->this_hdr.sh_entsize = 4;
3464
        }
3465
 
3466
    }
3467
 
3468
  if (htab->sgotplt)
3469
    {
3470
      /* Fill in the first three entries in the global offset table.  */
3471
      if (htab->sgotplt->size > 0)
3472
        {
3473
          bfd_put_32 (output_bfd,
3474
                      (sdyn == NULL ? (bfd_vma) 0
3475
                       : sdyn->output_section->vma + sdyn->output_offset),
3476
                      htab->sgotplt->contents);
3477
          /* One entry for shared object struct ptr.  */
3478
          bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3479
          /* One entry for _dl_runtime_resolve.  */
3480
          bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3481
        }
3482
 
3483
      elf_section_data (htab->sgotplt->output_section)
3484
        ->this_hdr.sh_entsize = 4;
3485
    }
3486
  return TRUE;
3487
}
3488
 
3489
static bfd_boolean
3490
elf_s390_grok_prstatus (abfd, note)
3491
     bfd * abfd;
3492
     Elf_Internal_Note * note;
3493
{
3494
  int offset;
3495
  unsigned int size;
3496
 
3497
  switch (note->descsz)
3498
    {
3499
      default:
3500
        return FALSE;
3501
 
3502
      case 224:         /* S/390 Linux.  */
3503
        /* pr_cursig */
3504
        elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3505
 
3506
        /* pr_pid */
3507
        elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3508
 
3509
        /* pr_reg */
3510
        offset = 72;
3511
        size = 144;
3512
        break;
3513
    }
3514
 
3515
  /* Make a ".reg/999" section.  */
3516
  return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3517
                                          size, note->descpos + offset);
3518
}
3519
 
3520
/* Return address for Ith PLT stub in section PLT, for relocation REL
3521
   or (bfd_vma) -1 if it should not be included.  */
3522
 
3523
static bfd_vma
3524
elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3525
                      const arelent *rel ATTRIBUTE_UNUSED)
3526
{
3527
  return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3528
}
3529
 
3530
 
3531
#define TARGET_BIG_SYM  bfd_elf32_s390_vec
3532
#define TARGET_BIG_NAME "elf32-s390"
3533
#define ELF_ARCH        bfd_arch_s390
3534
#define ELF_MACHINE_CODE EM_S390
3535
#define ELF_MACHINE_ALT1 EM_S390_OLD
3536
#define ELF_MAXPAGESIZE 0x1000
3537
 
3538
#define elf_backend_can_gc_sections     1
3539
#define elf_backend_can_refcount        1
3540
#define elf_backend_want_got_plt        1
3541
#define elf_backend_plt_readonly        1
3542
#define elf_backend_want_plt_sym        0
3543
#define elf_backend_got_header_size     12
3544
#define elf_backend_rela_normal         1
3545
 
3546
#define elf_info_to_howto                     elf_s390_info_to_howto
3547
 
3548
#define bfd_elf32_bfd_is_local_label_name     elf_s390_is_local_label_name
3549
#define bfd_elf32_bfd_link_hash_table_create  elf_s390_link_hash_table_create
3550
#define bfd_elf32_bfd_reloc_type_lookup       elf_s390_reloc_type_lookup
3551
#define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3552
 
3553
#define elf_backend_adjust_dynamic_symbol     elf_s390_adjust_dynamic_symbol
3554
#define elf_backend_check_relocs              elf_s390_check_relocs
3555
#define elf_backend_copy_indirect_symbol      elf_s390_copy_indirect_symbol
3556
#define elf_backend_create_dynamic_sections   elf_s390_create_dynamic_sections
3557
#define elf_backend_finish_dynamic_sections   elf_s390_finish_dynamic_sections
3558
#define elf_backend_finish_dynamic_symbol     elf_s390_finish_dynamic_symbol
3559
#define elf_backend_gc_mark_hook              elf_s390_gc_mark_hook
3560
#define elf_backend_gc_sweep_hook             elf_s390_gc_sweep_hook
3561
#define elf_backend_reloc_type_class          elf_s390_reloc_type_class
3562
#define elf_backend_relocate_section          elf_s390_relocate_section
3563
#define elf_backend_size_dynamic_sections     elf_s390_size_dynamic_sections
3564
#define elf_backend_init_index_section        _bfd_elf_init_1_index_section
3565
#define elf_backend_reloc_type_class          elf_s390_reloc_type_class
3566
#define elf_backend_grok_prstatus             elf_s390_grok_prstatus
3567
#define elf_backend_plt_sym_val               elf_s390_plt_sym_val
3568
 
3569
#define bfd_elf32_mkobject              elf_s390_mkobject
3570
#define elf_backend_object_p            elf_s390_object_p
3571
 
3572
#include "elf32-target.h"

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