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Prevent overflowing the selected_cpu_name buffer in the ARM assembler.
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
... / ...
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1/* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22#include "sysdep.h"
23#include "bfd.h"
24#include "bfdlink.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
27#include "elf/s390.h"
28
29/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
30 from smaller values. Start with zero, widen, *then* decrement. */
31#define MINUS_ONE (((bfd_vma)0) - 1)
32
33static bfd_reloc_status_type
34s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
36static bfd_reloc_status_type
37s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
38 asection *, bfd *, char **);
39
40/* The relocation "howto" table. */
41static reloc_howto_type elf_howto_table[] =
42{
43 HOWTO (R_390_NONE, /* type */
44 0, /* rightshift */
45 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
46 0, /* bitsize */
47 FALSE, /* pc_relative */
48 0, /* bitpos */
49 complain_overflow_dont, /* complain_on_overflow */
50 bfd_elf_generic_reloc, /* special_function */
51 "R_390_NONE", /* name */
52 FALSE, /* partial_inplace */
53 0, /* src_mask */
54 0, /* dst_mask */
55 FALSE), /* pcrel_offset */
56
57 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
58 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
59 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
60 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
61 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
63 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
65 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
67 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
69 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
71 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
73 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
75 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
79 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
81 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
83 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
85 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
87 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
97 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
99 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
101 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
103 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
105 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
107 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
109 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
111 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
113 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
114 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
115 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
119 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
121 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
123 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
125 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
127 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
129 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
130 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
131 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
135 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
136 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
138 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
139 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
140 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
141 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
143 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
144 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
146 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
147 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
149 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
151 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
152 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
154 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
155 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
157 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
164 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
165 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
169 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
172 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
173 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
175 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
179 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
181};
182
183/* GNU extension to record C++ vtable hierarchy. */
184static reloc_howto_type elf64_s390_vtinherit_howto =
185 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
186static reloc_howto_type elf64_s390_vtentry_howto =
187 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
188
189static reloc_howto_type *
190elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
191 bfd_reloc_code_real_type code)
192{
193 switch (code)
194 {
195 case BFD_RELOC_NONE:
196 return &elf_howto_table[(int) R_390_NONE];
197 case BFD_RELOC_8:
198 return &elf_howto_table[(int) R_390_8];
199 case BFD_RELOC_390_12:
200 return &elf_howto_table[(int) R_390_12];
201 case BFD_RELOC_16:
202 return &elf_howto_table[(int) R_390_16];
203 case BFD_RELOC_32:
204 return &elf_howto_table[(int) R_390_32];
205 case BFD_RELOC_CTOR:
206 return &elf_howto_table[(int) R_390_32];
207 case BFD_RELOC_32_PCREL:
208 return &elf_howto_table[(int) R_390_PC32];
209 case BFD_RELOC_390_GOT12:
210 return &elf_howto_table[(int) R_390_GOT12];
211 case BFD_RELOC_32_GOT_PCREL:
212 return &elf_howto_table[(int) R_390_GOT32];
213 case BFD_RELOC_390_PLT32:
214 return &elf_howto_table[(int) R_390_PLT32];
215 case BFD_RELOC_390_COPY:
216 return &elf_howto_table[(int) R_390_COPY];
217 case BFD_RELOC_390_GLOB_DAT:
218 return &elf_howto_table[(int) R_390_GLOB_DAT];
219 case BFD_RELOC_390_JMP_SLOT:
220 return &elf_howto_table[(int) R_390_JMP_SLOT];
221 case BFD_RELOC_390_RELATIVE:
222 return &elf_howto_table[(int) R_390_RELATIVE];
223 case BFD_RELOC_32_GOTOFF:
224 return &elf_howto_table[(int) R_390_GOTOFF32];
225 case BFD_RELOC_390_GOTPC:
226 return &elf_howto_table[(int) R_390_GOTPC];
227 case BFD_RELOC_390_GOT16:
228 return &elf_howto_table[(int) R_390_GOT16];
229 case BFD_RELOC_16_PCREL:
230 return &elf_howto_table[(int) R_390_PC16];
231 case BFD_RELOC_390_PC12DBL:
232 return &elf_howto_table[(int) R_390_PC12DBL];
233 case BFD_RELOC_390_PLT12DBL:
234 return &elf_howto_table[(int) R_390_PLT12DBL];
235 case BFD_RELOC_390_PC16DBL:
236 return &elf_howto_table[(int) R_390_PC16DBL];
237 case BFD_RELOC_390_PLT16DBL:
238 return &elf_howto_table[(int) R_390_PLT16DBL];
239 case BFD_RELOC_390_PC24DBL:
240 return &elf_howto_table[(int) R_390_PC24DBL];
241 case BFD_RELOC_390_PLT24DBL:
242 return &elf_howto_table[(int) R_390_PLT24DBL];
243 case BFD_RELOC_390_PC32DBL:
244 return &elf_howto_table[(int) R_390_PC32DBL];
245 case BFD_RELOC_390_PLT32DBL:
246 return &elf_howto_table[(int) R_390_PLT32DBL];
247 case BFD_RELOC_390_GOTPCDBL:
248 return &elf_howto_table[(int) R_390_GOTPCDBL];
249 case BFD_RELOC_64:
250 return &elf_howto_table[(int) R_390_64];
251 case BFD_RELOC_64_PCREL:
252 return &elf_howto_table[(int) R_390_PC64];
253 case BFD_RELOC_390_GOT64:
254 return &elf_howto_table[(int) R_390_GOT64];
255 case BFD_RELOC_390_PLT64:
256 return &elf_howto_table[(int) R_390_PLT64];
257 case BFD_RELOC_390_GOTENT:
258 return &elf_howto_table[(int) R_390_GOTENT];
259 case BFD_RELOC_16_GOTOFF:
260 return &elf_howto_table[(int) R_390_GOTOFF16];
261 case BFD_RELOC_390_GOTOFF64:
262 return &elf_howto_table[(int) R_390_GOTOFF64];
263 case BFD_RELOC_390_GOTPLT12:
264 return &elf_howto_table[(int) R_390_GOTPLT12];
265 case BFD_RELOC_390_GOTPLT16:
266 return &elf_howto_table[(int) R_390_GOTPLT16];
267 case BFD_RELOC_390_GOTPLT32:
268 return &elf_howto_table[(int) R_390_GOTPLT32];
269 case BFD_RELOC_390_GOTPLT64:
270 return &elf_howto_table[(int) R_390_GOTPLT64];
271 case BFD_RELOC_390_GOTPLTENT:
272 return &elf_howto_table[(int) R_390_GOTPLTENT];
273 case BFD_RELOC_390_PLTOFF16:
274 return &elf_howto_table[(int) R_390_PLTOFF16];
275 case BFD_RELOC_390_PLTOFF32:
276 return &elf_howto_table[(int) R_390_PLTOFF32];
277 case BFD_RELOC_390_PLTOFF64:
278 return &elf_howto_table[(int) R_390_PLTOFF64];
279 case BFD_RELOC_390_TLS_LOAD:
280 return &elf_howto_table[(int) R_390_TLS_LOAD];
281 case BFD_RELOC_390_TLS_GDCALL:
282 return &elf_howto_table[(int) R_390_TLS_GDCALL];
283 case BFD_RELOC_390_TLS_LDCALL:
284 return &elf_howto_table[(int) R_390_TLS_LDCALL];
285 case BFD_RELOC_390_TLS_GD64:
286 return &elf_howto_table[(int) R_390_TLS_GD64];
287 case BFD_RELOC_390_TLS_GOTIE12:
288 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
289 case BFD_RELOC_390_TLS_GOTIE64:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
291 case BFD_RELOC_390_TLS_LDM64:
292 return &elf_howto_table[(int) R_390_TLS_LDM64];
293 case BFD_RELOC_390_TLS_IE64:
294 return &elf_howto_table[(int) R_390_TLS_IE64];
295 case BFD_RELOC_390_TLS_IEENT:
296 return &elf_howto_table[(int) R_390_TLS_IEENT];
297 case BFD_RELOC_390_TLS_LE64:
298 return &elf_howto_table[(int) R_390_TLS_LE64];
299 case BFD_RELOC_390_TLS_LDO64:
300 return &elf_howto_table[(int) R_390_TLS_LDO64];
301 case BFD_RELOC_390_TLS_DTPMOD:
302 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
303 case BFD_RELOC_390_TLS_DTPOFF:
304 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
305 case BFD_RELOC_390_TLS_TPOFF:
306 return &elf_howto_table[(int) R_390_TLS_TPOFF];
307 case BFD_RELOC_390_20:
308 return &elf_howto_table[(int) R_390_20];
309 case BFD_RELOC_390_GOT20:
310 return &elf_howto_table[(int) R_390_GOT20];
311 case BFD_RELOC_390_GOTPLT20:
312 return &elf_howto_table[(int) R_390_GOTPLT20];
313 case BFD_RELOC_390_TLS_GOTIE20:
314 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
315 case BFD_RELOC_390_IRELATIVE:
316 return &elf_howto_table[(int) R_390_IRELATIVE];
317 case BFD_RELOC_VTABLE_INHERIT:
318 return &elf64_s390_vtinherit_howto;
319 case BFD_RELOC_VTABLE_ENTRY:
320 return &elf64_s390_vtentry_howto;
321 default:
322 break;
323 }
324 return 0;
325}
326
327static reloc_howto_type *
328elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
329 const char *r_name)
330{
331 unsigned int i;
332
333 for (i = 0;
334 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
335 i++)
336 if (elf_howto_table[i].name != NULL
337 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
338 return &elf_howto_table[i];
339
340 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
341 return &elf64_s390_vtinherit_howto;
342 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
343 return &elf64_s390_vtentry_howto;
344
345 return NULL;
346}
347
348/* We need to use ELF64_R_TYPE so we have our own copy of this function,
349 and elf64-s390.c has its own copy. */
350
351static void
352elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
353 arelent *cache_ptr,
354 Elf_Internal_Rela *dst)
355{
356 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
357 switch (r_type)
358 {
359 case R_390_GNU_VTINHERIT:
360 cache_ptr->howto = &elf64_s390_vtinherit_howto;
361 break;
362
363 case R_390_GNU_VTENTRY:
364 cache_ptr->howto = &elf64_s390_vtentry_howto;
365 break;
366
367 default:
368 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
369 {
370 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
371 abfd, (int) r_type);
372 r_type = R_390_NONE;
373 }
374 cache_ptr->howto = &elf_howto_table[r_type];
375 }
376}
377
378/* A relocation function which doesn't do anything. */
379static bfd_reloc_status_type
380s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
381 arelent *reloc_entry,
382 asymbol *symbol ATTRIBUTE_UNUSED,
383 void * data ATTRIBUTE_UNUSED,
384 asection *input_section,
385 bfd *output_bfd,
386 char **error_message ATTRIBUTE_UNUSED)
387{
388 if (output_bfd)
389 reloc_entry->address += input_section->output_offset;
390 return bfd_reloc_ok;
391}
392
393/* Handle the large displacement relocs. */
394static bfd_reloc_status_type
395s390_elf_ldisp_reloc (bfd *abfd,
396 arelent *reloc_entry,
397 asymbol *symbol,
398 void * data,
399 asection *input_section,
400 bfd *output_bfd,
401 char **error_message ATTRIBUTE_UNUSED)
402{
403 reloc_howto_type *howto = reloc_entry->howto;
404 bfd_vma relocation;
405 bfd_vma insn;
406
407 if (output_bfd != (bfd *) NULL
408 && (symbol->flags & BSF_SECTION_SYM) == 0
409 && (! howto->partial_inplace
410 || reloc_entry->addend == 0))
411 {
412 reloc_entry->address += input_section->output_offset;
413 return bfd_reloc_ok;
414 }
415 if (output_bfd != NULL)
416 return bfd_reloc_continue;
417
418 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
419 return bfd_reloc_outofrange;
420
421 relocation = (symbol->value
422 + symbol->section->output_section->vma
423 + symbol->section->output_offset);
424 relocation += reloc_entry->addend;
425 if (howto->pc_relative)
426 {
427 relocation -= (input_section->output_section->vma
428 + input_section->output_offset);
429 relocation -= reloc_entry->address;
430 }
431
432 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
433 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
434 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
435
436 if ((bfd_signed_vma) relocation < - 0x80000
437 || (bfd_signed_vma) relocation > 0x7ffff)
438 return bfd_reloc_overflow;
439 else
440 return bfd_reloc_ok;
441}
442
443static bfd_boolean
444elf_s390_is_local_label_name (bfd *abfd, const char *name)
445{
446 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
447 return TRUE;
448
449 return _bfd_elf_is_local_label_name (abfd, name);
450}
451
452/* Functions for the 390 ELF linker. */
453
454/* The name of the dynamic interpreter. This is put in the .interp
455 section. */
456
457#define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
458
459/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
460 copying dynamic variables from a shared lib into an app's dynbss
461 section, and instead use a dynamic relocation to point into the
462 shared lib. */
463#define ELIMINATE_COPY_RELOCS 1
464
465/* The size in bytes of the first entry in the procedure linkage table. */
466#define PLT_FIRST_ENTRY_SIZE 32
467/* The size in bytes of an entry in the procedure linkage table. */
468#define PLT_ENTRY_SIZE 32
469
470#define GOT_ENTRY_SIZE 8
471
472#define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
473
474/* The first three entries in a procedure linkage table are reserved,
475 and the initial contents are unimportant (we zero them out).
476 Subsequent entries look like this. See the SVR4 ABI 386
477 supplement to see how this works. */
478
479/* For the s390, simple addr offset can only be 0 - 4096.
480 To use the full 16777216 TB address space, several instructions
481 are needed to load an address in a register and execute
482 a branch( or just saving the address)
483
484 Furthermore, only r 0 and 1 are free to use!!! */
485
486/* The first 3 words in the GOT are then reserved.
487 Word 0 is the address of the dynamic table.
488 Word 1 is a pointer to a structure describing the object
489 Word 2 is used to point to the loader entry address.
490
491 The code for PLT entries looks like this:
492
493 The GOT holds the address in the PLT to be executed.
494 The loader then gets:
495 24(15) = Pointer to the structure describing the object.
496 28(15) = Offset in symbol table
497 The loader must then find the module where the function is
498 and insert the address in the GOT.
499
500 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
501 LG 1,0(1) # 6 bytes Load address from GOT in r1
502 BCR 15,1 # 2 bytes Jump to address
503 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
504 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
505 BRCL 15,-x # 6 bytes Jump to start of PLT
506 .long ? # 4 bytes offset into .rela.plt
507
508 Total = 32 bytes per PLT entry
509 Fixup at offset 2: relative address to GOT entry
510 Fixup at offset 22: relative branch to PLT0
511 Fixup at offset 28: 32 bit offset into .rela.plt
512
513 A 32 bit offset into the symbol table is enough. It allows for
514 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
515 object (the main program, any shared library) is limited to 4GB in
516 size. Having a .rela.plt of 2GB would already make the .plt
517 section bigger than 8GB. */
518
519static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
520 {
521 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
522 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
523 0x07, 0xf1, /* br %r1 */
524 0x0d, 0x10, /* basr %r1,%r0 */
525 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
526 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
527 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
528 };
529
530/* The first PLT entry pushes the offset into the symbol table
531 from R1 onto the stack at 56(15) and the loader object info
532 at 48(15), loads the loader address in R1 and jumps to it. */
533
534/* The first entry in the PLT:
535
536 PLT0:
537 STG 1,56(15) # r1 contains the offset into the symbol table
538 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
539 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
540 LG 1,16(1) # get entry address of loader
541 BCR 15,1 # jump to loader
542
543 Fixup at offset 8: relative address to start of GOT. */
544
545static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
546 {
547 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
548 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
549 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
550 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
551 0x07, 0xf1, /* br %r1 */
552 0x07, 0x00, /* nopr %r0 */
553 0x07, 0x00, /* nopr %r0 */
554 0x07, 0x00 /* nopr %r0 */
555 };
556
557
558/* s390 ELF linker hash entry. */
559
560struct elf_s390_link_hash_entry
561{
562 struct elf_link_hash_entry elf;
563
564 /* Track dynamic relocs copied for this symbol. */
565 struct elf_dyn_relocs *dyn_relocs;
566
567 /* Number of GOTPLT references for a function. */
568 bfd_signed_vma gotplt_refcount;
569
570#define GOT_UNKNOWN 0
571#define GOT_NORMAL 1
572#define GOT_TLS_GD 2
573#define GOT_TLS_IE 3
574#define GOT_TLS_IE_NLT 3
575 unsigned char tls_type;
576
577 /* For pointer equality reasons we might need to change the symbol
578 type from STT_GNU_IFUNC to STT_FUNC together with its value and
579 section entry. So after alloc_dynrelocs only these values should
580 be used. In order to check whether a symbol is IFUNC use
581 s390_is_ifunc_symbol_p. */
582 bfd_vma ifunc_resolver_address;
583 asection *ifunc_resolver_section;
584};
585
586#define elf_s390_hash_entry(ent) \
587 ((struct elf_s390_link_hash_entry *)(ent))
588
589/* This structure represents an entry in the local PLT list needed for
590 local IFUNC symbols. */
591struct plt_entry
592{
593 /* The section of the local symbol.
594 Set in relocate_section and used in finish_dynamic_sections. */
595 asection *sec;
596
597 union
598 {
599 bfd_signed_vma refcount;
600 bfd_vma offset;
601 } plt;
602};
603
604/* NOTE: Keep this structure in sync with
605 the one declared in elf32-s390.c. */
606struct elf_s390_obj_tdata
607{
608 struct elf_obj_tdata root;
609
610 /* A local PLT is needed for ifunc symbols. */
611 struct plt_entry *local_plt;
612
613 /* TLS type for each local got entry. */
614 char *local_got_tls_type;
615};
616
617#define elf_s390_tdata(abfd) \
618 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
619
620#define elf_s390_local_plt(abfd) \
621 (elf_s390_tdata (abfd)->local_plt)
622
623#define elf_s390_local_got_tls_type(abfd) \
624 (elf_s390_tdata (abfd)->local_got_tls_type)
625
626#define is_s390_elf(bfd) \
627 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
628 && elf_tdata (bfd) != NULL \
629 && elf_object_id (bfd) == S390_ELF_DATA)
630
631static bfd_boolean
632elf_s390_mkobject (bfd *abfd)
633{
634 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
635 S390_ELF_DATA);
636}
637
638static bfd_boolean
639elf_s390_object_p (bfd *abfd)
640{
641 /* Set the right machine number for an s390 elf32 file. */
642 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
643}
644
645/* s390 ELF linker hash table. */
646
647struct elf_s390_link_hash_table
648{
649 struct elf_link_hash_table elf;
650
651 /* Short-cuts to get to dynamic linker sections. */
652 asection *sdynbss;
653 asection *srelbss;
654 asection *irelifunc;
655
656 union {
657 bfd_signed_vma refcount;
658 bfd_vma offset;
659 } tls_ldm_got;
660
661 /* Small local sym cache. */
662 struct sym_cache sym_cache;
663};
664
665/* Get the s390 ELF linker hash table from a link_info structure. */
666
667#define elf_s390_hash_table(p) \
668 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
669 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
670
671#define ELF64 1
672#include "elf-s390-common.c"
673
674/* Create an entry in an s390 ELF linker hash table. */
675
676static struct bfd_hash_entry *
677link_hash_newfunc (struct bfd_hash_entry *entry,
678 struct bfd_hash_table *table,
679 const char *string)
680{
681 /* Allocate the structure if it has not already been allocated by a
682 subclass. */
683 if (entry == NULL)
684 {
685 entry = bfd_hash_allocate (table,
686 sizeof (struct elf_s390_link_hash_entry));
687 if (entry == NULL)
688 return entry;
689 }
690
691 /* Call the allocation method of the superclass. */
692 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
693 if (entry != NULL)
694 {
695 struct elf_s390_link_hash_entry *eh;
696
697 eh = (struct elf_s390_link_hash_entry *) entry;
698 eh->dyn_relocs = NULL;
699 eh->gotplt_refcount = 0;
700 eh->tls_type = GOT_UNKNOWN;
701 eh->ifunc_resolver_address = 0;
702 eh->ifunc_resolver_section = NULL;
703 }
704
705 return entry;
706}
707
708/* Create an s390 ELF linker hash table. */
709
710static struct bfd_link_hash_table *
711elf_s390_link_hash_table_create (bfd *abfd)
712{
713 struct elf_s390_link_hash_table *ret;
714 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
715
716 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
717 if (ret == NULL)
718 return NULL;
719
720 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
721 sizeof (struct elf_s390_link_hash_entry),
722 S390_ELF_DATA))
723 {
724 free (ret);
725 return NULL;
726 }
727
728 return &ret->elf.root;
729}
730
731/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
732 shortcuts to them in our hash table. */
733
734static bfd_boolean
735create_got_section (bfd *dynobj,
736 struct bfd_link_info *info)
737{
738 struct elf_s390_link_hash_table *htab;
739
740 if (! _bfd_elf_create_got_section (dynobj, info))
741 return FALSE;
742
743 htab = elf_s390_hash_table (info);
744 if (htab == NULL)
745 return FALSE;
746
747 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
748 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
749 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
750 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
751 abort ();
752 return TRUE;
753}
754
755/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
756 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
757 hash table. */
758
759static bfd_boolean
760elf_s390_create_dynamic_sections (bfd *dynobj,
761 struct bfd_link_info *info)
762{
763 struct elf_s390_link_hash_table *htab;
764
765 htab = elf_s390_hash_table (info);
766 if (htab == NULL)
767 return FALSE;
768
769 if (!htab->elf.sgot && !create_got_section (dynobj, info))
770 return FALSE;
771
772 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
773 return FALSE;
774
775 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
776 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
777 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
778 if (!bfd_link_pic (info))
779 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
780
781 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
782 || (!bfd_link_pic (info) && !htab->srelbss))
783 abort ();
784
785 return TRUE;
786}
787
788/* Copy the extra info we tack onto an elf_link_hash_entry. */
789
790static void
791elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
792 struct elf_link_hash_entry *dir,
793 struct elf_link_hash_entry *ind)
794{
795 struct elf_s390_link_hash_entry *edir, *eind;
796
797 edir = (struct elf_s390_link_hash_entry *) dir;
798 eind = (struct elf_s390_link_hash_entry *) ind;
799
800 if (eind->dyn_relocs != NULL)
801 {
802 if (edir->dyn_relocs != NULL)
803 {
804 struct elf_dyn_relocs **pp;
805 struct elf_dyn_relocs *p;
806
807 /* Add reloc counts against the indirect sym to the direct sym
808 list. Merge any entries against the same section. */
809 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
810 {
811 struct elf_dyn_relocs *q;
812
813 for (q = edir->dyn_relocs; q != NULL; q = q->next)
814 if (q->sec == p->sec)
815 {
816 q->pc_count += p->pc_count;
817 q->count += p->count;
818 *pp = p->next;
819 break;
820 }
821 if (q == NULL)
822 pp = &p->next;
823 }
824 *pp = edir->dyn_relocs;
825 }
826
827 edir->dyn_relocs = eind->dyn_relocs;
828 eind->dyn_relocs = NULL;
829 }
830
831 if (ind->root.type == bfd_link_hash_indirect
832 && dir->got.refcount <= 0)
833 {
834 edir->tls_type = eind->tls_type;
835 eind->tls_type = GOT_UNKNOWN;
836 }
837
838 if (ELIMINATE_COPY_RELOCS
839 && ind->root.type != bfd_link_hash_indirect
840 && dir->dynamic_adjusted)
841 {
842 /* If called to transfer flags for a weakdef during processing
843 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
844 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
845 dir->ref_dynamic |= ind->ref_dynamic;
846 dir->ref_regular |= ind->ref_regular;
847 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
848 dir->needs_plt |= ind->needs_plt;
849 }
850 else
851 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
852}
853
854static int
855elf_s390_tls_transition (struct bfd_link_info *info,
856 int r_type,
857 int is_local)
858{
859 if (bfd_link_pic (info))
860 return r_type;
861
862 switch (r_type)
863 {
864 case R_390_TLS_GD64:
865 case R_390_TLS_IE64:
866 if (is_local)
867 return R_390_TLS_LE64;
868 return R_390_TLS_IE64;
869 case R_390_TLS_GOTIE64:
870 if (is_local)
871 return R_390_TLS_LE64;
872 return R_390_TLS_GOTIE64;
873 case R_390_TLS_LDM64:
874 return R_390_TLS_LE64;
875 }
876
877 return r_type;
878}
879
880/* Look through the relocs for a section during the first phase, and
881 allocate space in the global offset table or procedure linkage
882 table. */
883
884static bfd_boolean
885elf_s390_check_relocs (bfd *abfd,
886 struct bfd_link_info *info,
887 asection *sec,
888 const Elf_Internal_Rela *relocs)
889{
890 struct elf_s390_link_hash_table *htab;
891 Elf_Internal_Shdr *symtab_hdr;
892 struct elf_link_hash_entry **sym_hashes;
893 const Elf_Internal_Rela *rel;
894 const Elf_Internal_Rela *rel_end;
895 asection *sreloc;
896 bfd_signed_vma *local_got_refcounts;
897 int tls_type, old_tls_type;
898
899 if (bfd_link_relocatable (info))
900 return TRUE;
901
902 BFD_ASSERT (is_s390_elf (abfd));
903
904 htab = elf_s390_hash_table (info);
905 if (htab == NULL)
906 return FALSE;
907
908 symtab_hdr = &elf_symtab_hdr (abfd);
909 sym_hashes = elf_sym_hashes (abfd);
910 local_got_refcounts = elf_local_got_refcounts (abfd);
911
912 sreloc = NULL;
913
914 rel_end = relocs + sec->reloc_count;
915 for (rel = relocs; rel < rel_end; rel++)
916 {
917 unsigned int r_type;
918 unsigned long r_symndx;
919 struct elf_link_hash_entry *h;
920 Elf_Internal_Sym *isym;
921
922 r_symndx = ELF64_R_SYM (rel->r_info);
923
924 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
925 {
926 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
927 abfd,
928 r_symndx);
929 return FALSE;
930 }
931
932 if (r_symndx < symtab_hdr->sh_info)
933 {
934 /* A local symbol. */
935 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
936 abfd, r_symndx);
937 if (isym == NULL)
938 return FALSE;
939
940 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
941 {
942 struct plt_entry *plt;
943
944 if (htab->elf.dynobj == NULL)
945 htab->elf.dynobj = abfd;
946
947 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
948 return FALSE;
949
950 if (local_got_refcounts == NULL)
951 {
952 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
953 return FALSE;
954 local_got_refcounts = elf_local_got_refcounts (abfd);
955 }
956 plt = elf_s390_local_plt (abfd);
957 plt[r_symndx].plt.refcount++;
958 }
959 h = NULL;
960 }
961 else
962 {
963 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
964 while (h->root.type == bfd_link_hash_indirect
965 || h->root.type == bfd_link_hash_warning)
966 h = (struct elf_link_hash_entry *) h->root.u.i.link;
967
968 /* PR15323, ref flags aren't set for references in the same
969 object. */
970 h->root.non_ir_ref = 1;
971 }
972
973 /* Create got section and local_got_refcounts array if they
974 are needed. */
975 r_type = elf_s390_tls_transition (info,
976 ELF64_R_TYPE (rel->r_info),
977 h == NULL);
978 switch (r_type)
979 {
980 case R_390_GOT12:
981 case R_390_GOT16:
982 case R_390_GOT20:
983 case R_390_GOT32:
984 case R_390_GOT64:
985 case R_390_GOTENT:
986 case R_390_GOTPLT12:
987 case R_390_GOTPLT16:
988 case R_390_GOTPLT20:
989 case R_390_GOTPLT32:
990 case R_390_GOTPLT64:
991 case R_390_GOTPLTENT:
992 case R_390_TLS_GD64:
993 case R_390_TLS_GOTIE12:
994 case R_390_TLS_GOTIE20:
995 case R_390_TLS_GOTIE64:
996 case R_390_TLS_IEENT:
997 case R_390_TLS_IE64:
998 case R_390_TLS_LDM64:
999 if (h == NULL
1000 && local_got_refcounts == NULL)
1001 {
1002 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1003 return FALSE;
1004 local_got_refcounts = elf_local_got_refcounts (abfd);
1005 }
1006
1007 /* Fall through. */
1008 case R_390_GOTOFF16:
1009 case R_390_GOTOFF32:
1010 case R_390_GOTOFF64:
1011 case R_390_GOTPC:
1012 case R_390_GOTPCDBL:
1013 if (htab->elf.sgot == NULL)
1014 {
1015 if (htab->elf.dynobj == NULL)
1016 htab->elf.dynobj = abfd;
1017 if (!create_got_section (htab->elf.dynobj, info))
1018 return FALSE;
1019 }
1020 }
1021
1022 if (h != NULL)
1023 {
1024 if (htab->elf.dynobj == NULL)
1025 htab->elf.dynobj = abfd;
1026 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1027 return FALSE;
1028
1029 /* Make sure an IFUNC symbol defined in a non-shared object
1030 always gets a PLT slot. */
1031 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1032 {
1033 /* The symbol is called by the dynamic loader in order
1034 to resolve the relocation. So it is in fact also
1035 referenced. */
1036 h->ref_regular = 1;
1037 h->needs_plt = 1;
1038 }
1039 }
1040
1041 switch (r_type)
1042 {
1043 case R_390_GOTOFF16:
1044 case R_390_GOTOFF32:
1045 case R_390_GOTOFF64:
1046 case R_390_GOTPC:
1047 case R_390_GOTPCDBL:
1048 /* These relocs do not need a GOT slot. They just load the
1049 GOT pointer itself or address something else relative to
1050 the GOT. Since the GOT pointer has been set up above we
1051 are done. */
1052 break;
1053
1054 case R_390_PLT12DBL:
1055 case R_390_PLT16DBL:
1056 case R_390_PLT24DBL:
1057 case R_390_PLT32:
1058 case R_390_PLT32DBL:
1059 case R_390_PLT64:
1060 case R_390_PLTOFF16:
1061 case R_390_PLTOFF32:
1062 case R_390_PLTOFF64:
1063 /* This symbol requires a procedure linkage table entry. We
1064 actually build the entry in adjust_dynamic_symbol,
1065 because this might be a case of linking PIC code which is
1066 never referenced by a dynamic object, in which case we
1067 don't need to generate a procedure linkage table entry
1068 after all. */
1069
1070 /* If this is a local symbol, we resolve it directly without
1071 creating a procedure linkage table entry. */
1072 if (h != NULL)
1073 {
1074 h->needs_plt = 1;
1075 h->plt.refcount += 1;
1076 }
1077 break;
1078
1079 case R_390_GOTPLT12:
1080 case R_390_GOTPLT16:
1081 case R_390_GOTPLT20:
1082 case R_390_GOTPLT32:
1083 case R_390_GOTPLT64:
1084 case R_390_GOTPLTENT:
1085 /* This symbol requires either a procedure linkage table entry
1086 or an entry in the local got. We actually build the entry
1087 in adjust_dynamic_symbol because whether this is really a
1088 global reference can change and with it the fact if we have
1089 to create a plt entry or a local got entry. To be able to
1090 make a once global symbol a local one we have to keep track
1091 of the number of gotplt references that exist for this
1092 symbol. */
1093 if (h != NULL)
1094 {
1095 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1096 h->needs_plt = 1;
1097 h->plt.refcount += 1;
1098 }
1099 else
1100 local_got_refcounts[r_symndx] += 1;
1101 break;
1102
1103 case R_390_TLS_LDM64:
1104 htab->tls_ldm_got.refcount += 1;
1105 break;
1106
1107 case R_390_TLS_IE64:
1108 case R_390_TLS_GOTIE12:
1109 case R_390_TLS_GOTIE20:
1110 case R_390_TLS_GOTIE64:
1111 case R_390_TLS_IEENT:
1112 if (bfd_link_pic (info))
1113 info->flags |= DF_STATIC_TLS;
1114 /* Fall through */
1115
1116 case R_390_GOT12:
1117 case R_390_GOT16:
1118 case R_390_GOT20:
1119 case R_390_GOT32:
1120 case R_390_GOT64:
1121 case R_390_GOTENT:
1122 case R_390_TLS_GD64:
1123 /* This symbol requires a global offset table entry. */
1124 switch (r_type)
1125 {
1126 default:
1127 case R_390_GOT12:
1128 case R_390_GOT16:
1129 case R_390_GOT20:
1130 case R_390_GOT32:
1131 case R_390_GOTENT:
1132 tls_type = GOT_NORMAL;
1133 break;
1134 case R_390_TLS_GD64:
1135 tls_type = GOT_TLS_GD;
1136 break;
1137 case R_390_TLS_IE64:
1138 case R_390_TLS_GOTIE64:
1139 tls_type = GOT_TLS_IE;
1140 break;
1141 case R_390_TLS_GOTIE12:
1142 case R_390_TLS_GOTIE20:
1143 case R_390_TLS_IEENT:
1144 tls_type = GOT_TLS_IE_NLT;
1145 break;
1146 }
1147
1148 if (h != NULL)
1149 {
1150 h->got.refcount += 1;
1151 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1152 }
1153 else
1154 {
1155 local_got_refcounts[r_symndx] += 1;
1156 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1157 }
1158 /* If a TLS symbol is accessed using IE at least once,
1159 there is no point to use dynamic model for it. */
1160 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1161 {
1162 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1163 {
1164 (*_bfd_error_handler)
1165 (_("%B: `%s' accessed both as normal and thread local symbol"),
1166 abfd, h->root.root.string);
1167 return FALSE;
1168 }
1169 if (old_tls_type > tls_type)
1170 tls_type = old_tls_type;
1171 }
1172
1173 if (old_tls_type != tls_type)
1174 {
1175 if (h != NULL)
1176 elf_s390_hash_entry (h)->tls_type = tls_type;
1177 else
1178 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1179 }
1180
1181 if (r_type != R_390_TLS_IE64)
1182 break;
1183 /* Fall through */
1184
1185 case R_390_TLS_LE64:
1186 /* For static linking and executables this reloc will be
1187 calculated at linktime otherwise a TLS_TPOFF runtime
1188 reloc will be generated. */
1189 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1190 break;
1191
1192 if (!bfd_link_pic (info))
1193 break;
1194 info->flags |= DF_STATIC_TLS;
1195 /* Fall through */
1196
1197 case R_390_8:
1198 case R_390_16:
1199 case R_390_32:
1200 case R_390_64:
1201 case R_390_PC12DBL:
1202 case R_390_PC16:
1203 case R_390_PC16DBL:
1204 case R_390_PC24DBL:
1205 case R_390_PC32:
1206 case R_390_PC32DBL:
1207 case R_390_PC64:
1208 if (h != NULL && bfd_link_executable (info))
1209 {
1210 /* If this reloc is in a read-only section, we might
1211 need a copy reloc. We can't check reliably at this
1212 stage whether the section is read-only, as input
1213 sections have not yet been mapped to output sections.
1214 Tentatively set the flag for now, and correct in
1215 adjust_dynamic_symbol. */
1216 h->non_got_ref = 1;
1217
1218 if (!bfd_link_pic (info))
1219 {
1220 /* We may need a .plt entry if the function this reloc
1221 refers to is in a shared lib. */
1222 h->plt.refcount += 1;
1223 }
1224 }
1225
1226 /* If we are creating a shared library, and this is a reloc
1227 against a global symbol, or a non PC relative reloc
1228 against a local symbol, then we need to copy the reloc
1229 into the shared library. However, if we are linking with
1230 -Bsymbolic, we do not need to copy a reloc against a
1231 global symbol which is defined in an object we are
1232 including in the link (i.e., DEF_REGULAR is set). At
1233 this point we have not seen all the input files, so it is
1234 possible that DEF_REGULAR is not set now but will be set
1235 later (it is never cleared). In case of a weak definition,
1236 DEF_REGULAR may be cleared later by a strong definition in
1237 a shared library. We account for that possibility below by
1238 storing information in the relocs_copied field of the hash
1239 table entry. A similar situation occurs when creating
1240 shared libraries and symbol visibility changes render the
1241 symbol local.
1242
1243 If on the other hand, we are creating an executable, we
1244 may need to keep relocations for symbols satisfied by a
1245 dynamic library if we manage to avoid copy relocs for the
1246 symbol. */
1247 if ((bfd_link_pic (info)
1248 && (sec->flags & SEC_ALLOC) != 0
1249 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1250 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1251 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1252 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1253 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1254 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1255 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1256 || (h != NULL
1257 && (! SYMBOLIC_BIND (info, h)
1258 || h->root.type == bfd_link_hash_defweak
1259 || !h->def_regular))))
1260 || (ELIMINATE_COPY_RELOCS
1261 && !bfd_link_pic (info)
1262 && (sec->flags & SEC_ALLOC) != 0
1263 && h != NULL
1264 && (h->root.type == bfd_link_hash_defweak
1265 || !h->def_regular)))
1266 {
1267 struct elf_dyn_relocs *p;
1268 struct elf_dyn_relocs **head;
1269
1270 /* We must copy these reloc types into the output file.
1271 Create a reloc section in dynobj and make room for
1272 this reloc. */
1273 if (sreloc == NULL)
1274 {
1275 if (htab->elf.dynobj == NULL)
1276 htab->elf.dynobj = abfd;
1277
1278 sreloc = _bfd_elf_make_dynamic_reloc_section
1279 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1280
1281 if (sreloc == NULL)
1282 return FALSE;
1283 }
1284
1285 /* If this is a global symbol, we count the number of
1286 relocations we need for this symbol. */
1287 if (h != NULL)
1288 {
1289 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1290 }
1291 else
1292 {
1293 /* Track dynamic relocs needed for local syms too.
1294 We really need local syms available to do this
1295 easily. Oh well. */
1296 asection *s;
1297 void *vpp;
1298
1299 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1300 abfd, r_symndx);
1301 if (isym == NULL)
1302 return FALSE;
1303
1304 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1305 if (s == NULL)
1306 s = sec;
1307
1308 vpp = &elf_section_data (s)->local_dynrel;
1309 head = (struct elf_dyn_relocs **) vpp;
1310 }
1311
1312 p = *head;
1313 if (p == NULL || p->sec != sec)
1314 {
1315 bfd_size_type amt = sizeof *p;
1316 p = ((struct elf_dyn_relocs *)
1317 bfd_alloc (htab->elf.dynobj, amt));
1318 if (p == NULL)
1319 return FALSE;
1320 p->next = *head;
1321 *head = p;
1322 p->sec = sec;
1323 p->count = 0;
1324 p->pc_count = 0;
1325 }
1326
1327 p->count += 1;
1328 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1329 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1330 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1331 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1332 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1333 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1334 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1335 p->pc_count += 1;
1336 }
1337 break;
1338
1339 /* This relocation describes the C++ object vtable hierarchy.
1340 Reconstruct it for later use during GC. */
1341 case R_390_GNU_VTINHERIT:
1342 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1343 return FALSE;
1344 break;
1345
1346 /* This relocation describes which C++ vtable entries are actually
1347 used. Record for later use during GC. */
1348 case R_390_GNU_VTENTRY:
1349 BFD_ASSERT (h != NULL);
1350 if (h != NULL
1351 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1352 return FALSE;
1353 break;
1354
1355 default:
1356 break;
1357 }
1358 }
1359
1360 return TRUE;
1361}
1362
1363/* Return the section that should be marked against GC for a given
1364 relocation. */
1365
1366static asection *
1367elf_s390_gc_mark_hook (asection *sec,
1368 struct bfd_link_info *info,
1369 Elf_Internal_Rela *rel,
1370 struct elf_link_hash_entry *h,
1371 Elf_Internal_Sym *sym)
1372{
1373 if (h != NULL)
1374 switch (ELF64_R_TYPE (rel->r_info))
1375 {
1376 case R_390_GNU_VTINHERIT:
1377 case R_390_GNU_VTENTRY:
1378 return NULL;
1379 }
1380
1381 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1382}
1383
1384/* Update the got entry reference counts for the section being removed. */
1385
1386static bfd_boolean
1387elf_s390_gc_sweep_hook (bfd *abfd,
1388 struct bfd_link_info *info,
1389 asection *sec,
1390 const Elf_Internal_Rela *relocs)
1391{
1392 struct elf_s390_link_hash_table *htab;
1393 Elf_Internal_Shdr *symtab_hdr;
1394 struct elf_link_hash_entry **sym_hashes;
1395 bfd_signed_vma *local_got_refcounts;
1396 const Elf_Internal_Rela *rel, *relend;
1397
1398 if (bfd_link_relocatable (info))
1399 return TRUE;
1400
1401 htab = elf_s390_hash_table (info);
1402 if (htab == NULL)
1403 return FALSE;
1404
1405 elf_section_data (sec)->local_dynrel = NULL;
1406
1407 symtab_hdr = &elf_symtab_hdr (abfd);
1408 sym_hashes = elf_sym_hashes (abfd);
1409 local_got_refcounts = elf_local_got_refcounts (abfd);
1410
1411 relend = relocs + sec->reloc_count;
1412 for (rel = relocs; rel < relend; rel++)
1413 {
1414 unsigned long r_symndx;
1415 unsigned int r_type;
1416 struct elf_link_hash_entry *h = NULL;
1417
1418 r_symndx = ELF64_R_SYM (rel->r_info);
1419 if (r_symndx >= symtab_hdr->sh_info)
1420 {
1421 struct elf_s390_link_hash_entry *eh;
1422 struct elf_dyn_relocs **pp;
1423 struct elf_dyn_relocs *p;
1424
1425 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1426 while (h->root.type == bfd_link_hash_indirect
1427 || h->root.type == bfd_link_hash_warning)
1428 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1429 eh = (struct elf_s390_link_hash_entry *) h;
1430
1431 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1432 if (p->sec == sec)
1433 {
1434 /* Everything must go for SEC. */
1435 *pp = p->next;
1436 break;
1437 }
1438 }
1439 else
1440 {
1441 Elf_Internal_Sym *isym;
1442
1443 /* A local symbol. */
1444 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1445 abfd, r_symndx);
1446 if (isym == NULL)
1447 return FALSE;
1448
1449 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1450 {
1451 struct plt_entry *plt = elf_s390_local_plt (abfd);
1452 if (plt[r_symndx].plt.refcount > 0)
1453 plt[r_symndx].plt.refcount--;
1454 }
1455 }
1456
1457 r_type = ELF64_R_TYPE (rel->r_info);
1458 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1459 switch (r_type)
1460 {
1461 case R_390_TLS_LDM64:
1462 if (htab->tls_ldm_got.refcount > 0)
1463 htab->tls_ldm_got.refcount -= 1;
1464 break;
1465 case R_390_GOTOFF16:
1466 case R_390_GOTOFF32:
1467 case R_390_GOTOFF64:
1468 case R_390_GOTPC:
1469 case R_390_GOTPCDBL:
1470 break;
1471
1472 case R_390_TLS_GD64:
1473 case R_390_TLS_IE64:
1474 case R_390_TLS_GOTIE12:
1475 case R_390_TLS_GOTIE20:
1476 case R_390_TLS_GOTIE64:
1477 case R_390_TLS_IEENT:
1478 case R_390_GOT12:
1479 case R_390_GOT16:
1480 case R_390_GOT20:
1481 case R_390_GOT32:
1482 case R_390_GOT64:
1483 case R_390_GOTENT:
1484 if (h != NULL)
1485 {
1486 if (h->got.refcount > 0)
1487 h->got.refcount -= 1;
1488 }
1489 else if (local_got_refcounts != NULL)
1490 {
1491 if (local_got_refcounts[r_symndx] > 0)
1492 local_got_refcounts[r_symndx] -= 1;
1493 }
1494 break;
1495
1496 case R_390_8:
1497 case R_390_12:
1498 case R_390_16:
1499 case R_390_20:
1500 case R_390_32:
1501 case R_390_64:
1502 case R_390_PC16:
1503 case R_390_PC12DBL:
1504 case R_390_PC16DBL:
1505 case R_390_PC24DBL:
1506 case R_390_PC32:
1507 case R_390_PC32DBL:
1508 case R_390_PC64:
1509 if (bfd_link_pic (info))
1510 break;
1511 /* Fall through */
1512
1513 case R_390_PLT12DBL:
1514 case R_390_PLT16DBL:
1515 case R_390_PLT24DBL:
1516 case R_390_PLT32:
1517 case R_390_PLT32DBL:
1518 case R_390_PLT64:
1519 case R_390_PLTOFF16:
1520 case R_390_PLTOFF32:
1521 case R_390_PLTOFF64:
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_GOTPLT64:
1534 case R_390_GOTPLTENT:
1535 if (h != NULL)
1536 {
1537 if (h->plt.refcount > 0)
1538 {
1539 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1540 h->plt.refcount -= 1;
1541 }
1542 }
1543 else if (local_got_refcounts != NULL)
1544 {
1545 if (local_got_refcounts[r_symndx] > 0)
1546 local_got_refcounts[r_symndx] -= 1;
1547 }
1548 break;
1549
1550 default:
1551 break;
1552 }
1553 }
1554
1555 return TRUE;
1556}
1557
1558/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1559 entry but we found we will not create any. Called when we find we will
1560 not have any PLT for this symbol, by for example
1561 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1562 or elf_s390_size_dynamic_sections if no dynamic sections will be
1563 created (we're only linking static objects). */
1564
1565static void
1566elf_s390_adjust_gotplt (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
1586static bfd_boolean
1587elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1588 struct elf_link_hash_entry *h)
1589{
1590 struct elf_s390_link_hash_table *htab;
1591 asection *s;
1592
1593 /* STT_GNU_IFUNC symbol must go through PLT. */
1594 if (s390_is_ifunc_symbol_p (h))
1595 {
1596 /* All local STT_GNU_IFUNC references must be treated as local
1597 calls via local PLT. */
1598 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1599 {
1600 bfd_size_type pc_count = 0, count = 0;
1601 struct elf_dyn_relocs **pp;
1602 struct elf_s390_link_hash_entry *eh;
1603 struct elf_dyn_relocs *p;
1604
1605 eh = (struct elf_s390_link_hash_entry *) h;
1606 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1607 {
1608 pc_count += p->pc_count;
1609 p->count -= p->pc_count;
1610 p->pc_count = 0;
1611 count += p->count;
1612 if (p->count == 0)
1613 *pp = p->next;
1614 else
1615 pp = &p->next;
1616 }
1617
1618 if (pc_count || count)
1619 {
1620 h->needs_plt = 1;
1621 h->non_got_ref = 1;
1622 if (h->plt.refcount <= 0)
1623 h->plt.refcount = 1;
1624 else
1625 h->plt.refcount += 1;
1626 }
1627 }
1628
1629 if (h->plt.refcount <= 0)
1630 {
1631 h->plt.offset = (bfd_vma) -1;
1632 h->needs_plt = 0;
1633 }
1634 return TRUE;
1635 }
1636
1637 /* If this is a function, put it in the procedure linkage table. We
1638 will fill in the contents of the procedure linkage table later
1639 (although we could actually do it here). */
1640 if (h->type == STT_FUNC
1641 || h->needs_plt)
1642 {
1643 if (h->plt.refcount <= 0
1644 || SYMBOL_CALLS_LOCAL (info, h)
1645 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1646 && h->root.type == bfd_link_hash_undefweak))
1647 {
1648 /* This case can occur if we saw a PLT32 reloc in an input
1649 file, but the symbol was never referred to by a dynamic
1650 object, or if all references were garbage collected. In
1651 such a case, we don't actually need to build a procedure
1652 linkage table, and we can just do a PC32 reloc instead. */
1653 h->plt.offset = (bfd_vma) -1;
1654 h->needs_plt = 0;
1655 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1656 }
1657
1658 return TRUE;
1659 }
1660 else
1661 /* It's possible that we incorrectly decided a .plt reloc was
1662 needed for an R_390_PC32 reloc to a non-function sym in
1663 check_relocs. We can't decide accurately between function and
1664 non-function syms in check-relocs; Objects loaded later in
1665 the link may change h->type. So fix it now. */
1666 h->plt.offset = (bfd_vma) -1;
1667
1668 /* If this is a weak symbol, and there is a real definition, the
1669 processor independent code will have arranged for us to see the
1670 real definition first, and we can just use the same value. */
1671 if (h->u.weakdef != NULL)
1672 {
1673 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1674 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1675 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1676 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1677 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1678 h->non_got_ref = h->u.weakdef->non_got_ref;
1679 return TRUE;
1680 }
1681
1682 /* This is a reference to a symbol defined by a dynamic object which
1683 is not a function. */
1684
1685 /* If we are creating a shared library, we must presume that the
1686 only references to the symbol are via the global offset table.
1687 For such cases we need not do anything here; the relocations will
1688 be handled correctly by relocate_section. */
1689 if (bfd_link_pic (info))
1690 return TRUE;
1691
1692 /* If there are no references to this symbol that do not use the
1693 GOT, we don't need to generate a copy reloc. */
1694 if (!h->non_got_ref)
1695 return TRUE;
1696
1697 /* If -z nocopyreloc was given, we won't generate them either. */
1698 if (info->nocopyreloc)
1699 {
1700 h->non_got_ref = 0;
1701 return TRUE;
1702 }
1703
1704 if (ELIMINATE_COPY_RELOCS)
1705 {
1706 struct elf_s390_link_hash_entry * eh;
1707 struct elf_dyn_relocs *p;
1708
1709 eh = (struct elf_s390_link_hash_entry *) h;
1710 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1711 {
1712 s = p->sec->output_section;
1713 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1714 break;
1715 }
1716
1717 /* If we didn't find any dynamic relocs in read-only sections, then
1718 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1719 if (p == NULL)
1720 {
1721 h->non_got_ref = 0;
1722 return TRUE;
1723 }
1724 }
1725
1726 /* We must allocate the symbol in our .dynbss section, which will
1727 become part of the .bss section of the executable. There will be
1728 an entry for this symbol in the .dynsym section. The dynamic
1729 object will contain position independent code, so all references
1730 from the dynamic object to this symbol will go through the global
1731 offset table. The dynamic linker will use the .dynsym entry to
1732 determine the address it must put in the global offset table, so
1733 both the dynamic object and the regular object will refer to the
1734 same memory location for the variable. */
1735
1736 htab = elf_s390_hash_table (info);
1737 if (htab == NULL)
1738 return FALSE;
1739
1740 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1741 copy the initial value out of the dynamic object and into the
1742 runtime process image. */
1743 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1744 {
1745 htab->srelbss->size += sizeof (Elf64_External_Rela);
1746 h->needs_copy = 1;
1747 }
1748
1749 s = htab->sdynbss;
1750
1751 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1752}
1753
1754/* Allocate space in .plt, .got and associated reloc sections for
1755 dynamic relocs. */
1756
1757static bfd_boolean
1758allocate_dynrelocs (struct elf_link_hash_entry *h,
1759 void * inf)
1760{
1761 struct bfd_link_info *info;
1762 struct elf_s390_link_hash_table *htab;
1763 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1764 struct elf_dyn_relocs *p;
1765
1766 if (h->root.type == bfd_link_hash_indirect)
1767 return TRUE;
1768
1769 info = (struct bfd_link_info *) inf;
1770 htab = elf_s390_hash_table (info);
1771 if (htab == NULL)
1772 return FALSE;
1773
1774 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1775 here if it is defined and referenced in a non-shared object. */
1776 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1777 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1778 else if (htab->elf.dynamic_sections_created
1779 && h->plt.refcount > 0)
1780 {
1781 /* Make sure this symbol is output as a dynamic symbol.
1782 Undefined weak syms won't yet be marked as dynamic. */
1783 if (h->dynindx == -1
1784 && !h->forced_local)
1785 {
1786 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1787 return FALSE;
1788 }
1789
1790 if (bfd_link_pic (info)
1791 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1792 {
1793 asection *s = htab->elf.splt;
1794
1795 /* If this is the first .plt entry, make room for the special
1796 first entry. */
1797 if (s->size == 0)
1798 s->size += PLT_FIRST_ENTRY_SIZE;
1799
1800 h->plt.offset = s->size;
1801
1802 /* If this symbol is not defined in a regular file, and we are
1803 not generating a shared library, then set the symbol to this
1804 location in the .plt. This is required to make function
1805 pointers compare as equal between the normal executable and
1806 the shared library. */
1807 if (! bfd_link_pic (info)
1808 && !h->def_regular)
1809 {
1810 h->root.u.def.section = s;
1811 h->root.u.def.value = h->plt.offset;
1812 }
1813
1814 /* Make room for this entry. */
1815 s->size += PLT_ENTRY_SIZE;
1816
1817 /* We also need to make an entry in the .got.plt section, which
1818 will be placed in the .got section by the linker script. */
1819 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1820
1821 /* We also need to make an entry in the .rela.plt section. */
1822 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1823 }
1824 else
1825 {
1826 h->plt.offset = (bfd_vma) -1;
1827 h->needs_plt = 0;
1828 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1829 }
1830 }
1831 else
1832 {
1833 h->plt.offset = (bfd_vma) -1;
1834 h->needs_plt = 0;
1835 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1836 }
1837
1838 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1839 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1840 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1841 we can save the dynamic TLS relocation. */
1842 if (h->got.refcount > 0
1843 && !bfd_link_pic (info)
1844 && h->dynindx == -1
1845 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1846 {
1847 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1848 /* For the GOTIE access without a literal pool entry the offset has
1849 to be stored somewhere. The immediate value in the instruction
1850 is not bit enough so the value is stored in the got. */
1851 {
1852 h->got.offset = htab->elf.sgot->size;
1853 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1854 }
1855 else
1856 h->got.offset = (bfd_vma) -1;
1857 }
1858 else if (h->got.refcount > 0)
1859 {
1860 asection *s;
1861 bfd_boolean dyn;
1862 int tls_type = elf_s390_hash_entry(h)->tls_type;
1863
1864 /* Make sure this symbol is output as a dynamic symbol.
1865 Undefined weak syms won't yet be marked as dynamic. */
1866 if (h->dynindx == -1
1867 && !h->forced_local)
1868 {
1869 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1870 return FALSE;
1871 }
1872
1873 s = htab->elf.sgot;
1874 h->got.offset = s->size;
1875 s->size += GOT_ENTRY_SIZE;
1876 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1877 if (tls_type == GOT_TLS_GD)
1878 s->size += GOT_ENTRY_SIZE;
1879 dyn = htab->elf.dynamic_sections_created;
1880 /* R_390_TLS_IE64 needs one dynamic relocation,
1881 R_390_TLS_GD64 needs one if local symbol and two if global. */
1882 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1883 || tls_type >= GOT_TLS_IE)
1884 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1885 else if (tls_type == GOT_TLS_GD)
1886 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1887 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1888 || h->root.type != bfd_link_hash_undefweak)
1889 && (bfd_link_pic (info)
1890 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1891 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1892 }
1893 else
1894 h->got.offset = (bfd_vma) -1;
1895
1896 if (eh->dyn_relocs == NULL)
1897 return TRUE;
1898
1899 /* In the shared -Bsymbolic case, discard space allocated for
1900 dynamic pc-relative relocs against symbols which turn out to be
1901 defined in regular objects. For the normal shared case, discard
1902 space for pc-relative relocs that have become local due to symbol
1903 visibility changes. */
1904
1905 if (bfd_link_pic (info))
1906 {
1907 if (SYMBOL_CALLS_LOCAL (info, h))
1908 {
1909 struct elf_dyn_relocs **pp;
1910
1911 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1912 {
1913 p->count -= p->pc_count;
1914 p->pc_count = 0;
1915 if (p->count == 0)
1916 *pp = p->next;
1917 else
1918 pp = &p->next;
1919 }
1920 }
1921
1922 /* Also discard relocs on undefined weak syms with non-default
1923 visibility. */
1924 if (eh->dyn_relocs != NULL
1925 && h->root.type == bfd_link_hash_undefweak)
1926 {
1927 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1928 eh->dyn_relocs = NULL;
1929
1930 /* Make sure undefined weak symbols are output as a dynamic
1931 symbol in PIEs. */
1932 else if (h->dynindx == -1
1933 && !h->forced_local)
1934 {
1935 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1936 return FALSE;
1937 }
1938 }
1939 }
1940 else if (ELIMINATE_COPY_RELOCS)
1941 {
1942 /* For the non-shared case, discard space for relocs against
1943 symbols which turn out to need copy relocs or are not
1944 dynamic. */
1945
1946 if (!h->non_got_ref
1947 && ((h->def_dynamic
1948 && !h->def_regular)
1949 || (htab->elf.dynamic_sections_created
1950 && (h->root.type == bfd_link_hash_undefweak
1951 || h->root.type == bfd_link_hash_undefined))))
1952 {
1953 /* Make sure this symbol is output as a dynamic symbol.
1954 Undefined weak syms won't yet be marked as dynamic. */
1955 if (h->dynindx == -1
1956 && !h->forced_local)
1957 {
1958 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1959 return FALSE;
1960 }
1961
1962 /* If that succeeded, we know we'll be keeping all the
1963 relocs. */
1964 if (h->dynindx != -1)
1965 goto keep;
1966 }
1967
1968 eh->dyn_relocs = NULL;
1969
1970 keep: ;
1971 }
1972
1973 /* Finally, allocate space. */
1974 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1975 {
1976 asection *sreloc = elf_section_data (p->sec)->sreloc;
1977 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1978 }
1979
1980 return TRUE;
1981}
1982
1983/* Find any dynamic relocs that apply to read-only sections. */
1984
1985static bfd_boolean
1986readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1987{
1988 struct elf_s390_link_hash_entry *eh;
1989 struct elf_dyn_relocs *p;
1990
1991 eh = (struct elf_s390_link_hash_entry *) h;
1992 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1993 {
1994 asection *s = p->sec->output_section;
1995
1996 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1997 {
1998 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1999
2000 info->flags |= DF_TEXTREL;
2001
2002 /* Not an error, just cut short the traversal. */
2003 return FALSE;
2004 }
2005 }
2006 return TRUE;
2007}
2008
2009/* Set the sizes of the dynamic sections. */
2010
2011static bfd_boolean
2012elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2013 struct bfd_link_info *info)
2014{
2015 struct elf_s390_link_hash_table *htab;
2016 bfd *dynobj;
2017 asection *s;
2018 bfd_boolean relocs;
2019 bfd *ibfd;
2020
2021 htab = elf_s390_hash_table (info);
2022 if (htab == NULL)
2023 return FALSE;
2024
2025 dynobj = htab->elf.dynobj;
2026 if (dynobj == NULL)
2027 abort ();
2028
2029 if (htab->elf.dynamic_sections_created)
2030 {
2031 /* Set the contents of the .interp section to the interpreter. */
2032 if (bfd_link_executable (info) && !info->nointerp)
2033 {
2034 s = bfd_get_linker_section (dynobj, ".interp");
2035 if (s == NULL)
2036 abort ();
2037 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2038 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2039 }
2040 }
2041
2042 /* Set up .got offsets for local syms, and space for local dynamic
2043 relocs. */
2044 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2045 {
2046 bfd_signed_vma *local_got;
2047 bfd_signed_vma *end_local_got;
2048 char *local_tls_type;
2049 bfd_size_type locsymcount;
2050 Elf_Internal_Shdr *symtab_hdr;
2051 asection *srela;
2052 struct plt_entry *local_plt;
2053 unsigned int i;
2054
2055 if (! is_s390_elf (ibfd))
2056 continue;
2057
2058 for (s = ibfd->sections; s != NULL; s = s->next)
2059 {
2060 struct elf_dyn_relocs *p;
2061
2062 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2063 {
2064 if (!bfd_is_abs_section (p->sec)
2065 && bfd_is_abs_section (p->sec->output_section))
2066 {
2067 /* Input section has been discarded, either because
2068 it is a copy of a linkonce section or due to
2069 linker script /DISCARD/, so we'll be discarding
2070 the relocs too. */
2071 }
2072 else if (p->count != 0)
2073 {
2074 srela = elf_section_data (p->sec)->sreloc;
2075 srela->size += p->count * sizeof (Elf64_External_Rela);
2076 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2077 info->flags |= DF_TEXTREL;
2078 }
2079 }
2080 }
2081
2082 local_got = elf_local_got_refcounts (ibfd);
2083 if (!local_got)
2084 continue;
2085
2086 symtab_hdr = &elf_symtab_hdr (ibfd);
2087 locsymcount = symtab_hdr->sh_info;
2088 end_local_got = local_got + locsymcount;
2089 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2090 s = htab->elf.sgot;
2091 srela = htab->elf.srelgot;
2092 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2093 {
2094 if (*local_got > 0)
2095 {
2096 *local_got = s->size;
2097 s->size += GOT_ENTRY_SIZE;
2098 if (*local_tls_type == GOT_TLS_GD)
2099 s->size += GOT_ENTRY_SIZE;
2100 if (bfd_link_pic (info))
2101 srela->size += sizeof (Elf64_External_Rela);
2102 }
2103 else
2104 *local_got = (bfd_vma) -1;
2105 }
2106
2107 local_plt = elf_s390_local_plt (ibfd);
2108 for (i = 0; i < symtab_hdr->sh_info; i++)
2109 {
2110 if (local_plt[i].plt.refcount > 0)
2111 {
2112 local_plt[i].plt.offset = htab->elf.iplt->size;
2113 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2114 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2115 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2116 }
2117 else
2118 local_plt[i].plt.offset = (bfd_vma) -1;
2119 }
2120 }
2121
2122 if (htab->tls_ldm_got.refcount > 0)
2123 {
2124 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2125 relocs. */
2126 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2127 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2128 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2129 }
2130 else
2131 htab->tls_ldm_got.offset = -1;
2132
2133 /* Allocate global sym .plt and .got entries, and space for global
2134 sym dynamic relocs. */
2135 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2136
2137 /* We now have determined the sizes of the various dynamic sections.
2138 Allocate memory for them. */
2139 relocs = FALSE;
2140 for (s = dynobj->sections; s != NULL; s = s->next)
2141 {
2142 if ((s->flags & SEC_LINKER_CREATED) == 0)
2143 continue;
2144
2145 if (s == htab->elf.splt
2146 || s == htab->elf.sgot
2147 || s == htab->elf.sgotplt
2148 || s == htab->sdynbss
2149 || s == htab->elf.iplt
2150 || s == htab->elf.igotplt
2151 || s == htab->irelifunc)
2152 {
2153 /* Strip this section if we don't need it; see the
2154 comment below. */
2155 }
2156 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2157 {
2158 if (s->size != 0 && s != htab->elf.srelplt)
2159 relocs = TRUE;
2160
2161 /* We use the reloc_count field as a counter if we need
2162 to copy relocs into the output file. */
2163 s->reloc_count = 0;
2164 }
2165 else
2166 {
2167 /* It's not one of our sections, so don't allocate space. */
2168 continue;
2169 }
2170
2171 if (s->size == 0)
2172 {
2173 /* If we don't need this section, strip it from the
2174 output file. This is to handle .rela.bss and
2175 .rela.plt. We must create it in
2176 create_dynamic_sections, because it must be created
2177 before the linker maps input sections to output
2178 sections. The linker does that before
2179 adjust_dynamic_symbol is called, and it is that
2180 function which decides whether anything needs to go
2181 into these sections. */
2182
2183 s->flags |= SEC_EXCLUDE;
2184 continue;
2185 }
2186
2187 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2188 continue;
2189
2190 /* Allocate memory for the section contents. We use bfd_zalloc
2191 here in case unused entries are not reclaimed before the
2192 section's contents are written out. This should not happen,
2193 but this way if it does, we get a R_390_NONE reloc instead
2194 of garbage. */
2195 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2196 if (s->contents == NULL)
2197 return FALSE;
2198 }
2199
2200 if (htab->elf.dynamic_sections_created)
2201 {
2202 /* Add some entries to the .dynamic section. We fill in the
2203 values later, in elf_s390_finish_dynamic_sections, but we
2204 must add the entries now so that we get the correct size for
2205 the .dynamic section. The DT_DEBUG entry is filled in by the
2206 dynamic linker and used by the debugger. */
2207#define add_dynamic_entry(TAG, VAL) \
2208 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2209
2210 if (bfd_link_executable (info))
2211 {
2212 if (!add_dynamic_entry (DT_DEBUG, 0))
2213 return FALSE;
2214 }
2215
2216 if (htab->elf.splt->size != 0)
2217 {
2218 if (!add_dynamic_entry (DT_PLTGOT, 0)
2219 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2220 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2221 || !add_dynamic_entry (DT_JMPREL, 0))
2222 return FALSE;
2223 }
2224
2225 if (relocs)
2226 {
2227 if (!add_dynamic_entry (DT_RELA, 0)
2228 || !add_dynamic_entry (DT_RELASZ, 0)
2229 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2230 return FALSE;
2231
2232 /* If any dynamic relocs apply to a read-only section,
2233 then we need a DT_TEXTREL entry. */
2234 if ((info->flags & DF_TEXTREL) == 0)
2235 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2236 info);
2237
2238 if ((info->flags & DF_TEXTREL) != 0)
2239 {
2240 if (!add_dynamic_entry (DT_TEXTREL, 0))
2241 return FALSE;
2242 }
2243 }
2244 }
2245#undef add_dynamic_entry
2246
2247 return TRUE;
2248}
2249
2250/* Return the base VMA address which should be subtracted from real addresses
2251 when resolving @dtpoff relocation.
2252 This is PT_TLS segment p_vaddr. */
2253
2254static bfd_vma
2255dtpoff_base (struct bfd_link_info *info)
2256{
2257 /* If tls_sec is NULL, we should have signalled an error already. */
2258 if (elf_hash_table (info)->tls_sec == NULL)
2259 return 0;
2260 return elf_hash_table (info)->tls_sec->vma;
2261}
2262
2263/* Return the relocation value for @tpoff relocation
2264 if STT_TLS virtual address is ADDRESS. */
2265
2266static bfd_vma
2267tpoff (struct bfd_link_info *info, bfd_vma address)
2268{
2269 struct elf_link_hash_table *htab = elf_hash_table (info);
2270
2271 /* If tls_sec is NULL, we should have signalled an error already. */
2272 if (htab->tls_sec == NULL)
2273 return 0;
2274 return htab->tls_size + htab->tls_sec->vma - address;
2275}
2276
2277/* Complain if TLS instruction relocation is against an invalid
2278 instruction. */
2279
2280static void
2281invalid_tls_insn (bfd *input_bfd,
2282 asection *input_section,
2283 Elf_Internal_Rela *rel)
2284{
2285 reloc_howto_type *howto;
2286
2287 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2288 (*_bfd_error_handler)
2289 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2290 input_bfd,
2291 input_section,
2292 (long) rel->r_offset,
2293 howto->name);
2294 bfd_set_error (bfd_error_bad_value);
2295}
2296
2297/* Relocate a 390 ELF section. */
2298
2299static bfd_boolean
2300elf_s390_relocate_section (bfd *output_bfd,
2301 struct bfd_link_info *info,
2302 bfd *input_bfd,
2303 asection *input_section,
2304 bfd_byte *contents,
2305 Elf_Internal_Rela *relocs,
2306 Elf_Internal_Sym *local_syms,
2307 asection **local_sections)
2308{
2309 struct elf_s390_link_hash_table *htab;
2310 Elf_Internal_Shdr *symtab_hdr;
2311 struct elf_link_hash_entry **sym_hashes;
2312 bfd_vma *local_got_offsets;
2313 Elf_Internal_Rela *rel;
2314 Elf_Internal_Rela *relend;
2315
2316 BFD_ASSERT (is_s390_elf (input_bfd));
2317
2318 htab = elf_s390_hash_table (info);
2319 if (htab == NULL)
2320 return FALSE;
2321
2322 symtab_hdr = &elf_symtab_hdr (input_bfd);
2323 sym_hashes = elf_sym_hashes (input_bfd);
2324 local_got_offsets = elf_local_got_offsets (input_bfd);
2325
2326 rel = relocs;
2327 relend = relocs + input_section->reloc_count;
2328 for (; rel < relend; rel++)
2329 {
2330 unsigned int r_type;
2331 reloc_howto_type *howto;
2332 unsigned long r_symndx;
2333 struct elf_link_hash_entry *h;
2334 Elf_Internal_Sym *sym;
2335 asection *sec;
2336 bfd_vma off;
2337 bfd_vma relocation;
2338 bfd_boolean unresolved_reloc;
2339 bfd_reloc_status_type r;
2340 int tls_type;
2341 asection *base_got = htab->elf.sgot;
2342
2343 r_type = ELF64_R_TYPE (rel->r_info);
2344 if (r_type == (int) R_390_GNU_VTINHERIT
2345 || r_type == (int) R_390_GNU_VTENTRY)
2346 continue;
2347 if (r_type >= (int) R_390_max)
2348 {
2349 bfd_set_error (bfd_error_bad_value);
2350 return FALSE;
2351 }
2352
2353 howto = elf_howto_table + r_type;
2354 r_symndx = ELF64_R_SYM (rel->r_info);
2355
2356 h = NULL;
2357 sym = NULL;
2358 sec = NULL;
2359 unresolved_reloc = FALSE;
2360 if (r_symndx < symtab_hdr->sh_info)
2361 {
2362 sym = local_syms + r_symndx;
2363 sec = local_sections[r_symndx];
2364
2365 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2366 {
2367 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2368 if (local_plt == NULL)
2369 return FALSE;
2370
2371 /* Address of the PLT slot. */
2372 relocation = (htab->elf.iplt->output_section->vma
2373 + htab->elf.iplt->output_offset
2374 + local_plt[r_symndx].plt.offset);
2375
2376 switch (r_type)
2377 {
2378 case R_390_PLTOFF16:
2379 case R_390_PLTOFF32:
2380 case R_390_PLTOFF64:
2381 relocation -= htab->elf.sgot->output_section->vma;
2382 break;
2383 case R_390_GOTPLT12:
2384 case R_390_GOTPLT16:
2385 case R_390_GOTPLT20:
2386 case R_390_GOTPLT32:
2387 case R_390_GOTPLT64:
2388 case R_390_GOTPLTENT:
2389 case R_390_GOT12:
2390 case R_390_GOT16:
2391 case R_390_GOT20:
2392 case R_390_GOT32:
2393 case R_390_GOT64:
2394 case R_390_GOTENT:
2395 {
2396 /* Write the PLT slot address into the GOT slot. */
2397 bfd_put_64 (output_bfd, relocation,
2398 htab->elf.sgot->contents +
2399 local_got_offsets[r_symndx]);
2400 relocation = (local_got_offsets[r_symndx] +
2401 htab->elf.sgot->output_offset);
2402
2403 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2404 relocation += htab->elf.sgot->output_section->vma;
2405 break;
2406 }
2407 default:
2408 break;
2409 }
2410 /* The output section is needed later in
2411 finish_dynamic_section when creating the dynamic
2412 relocation. */
2413 local_plt[r_symndx].sec = sec;
2414 goto do_relocation;
2415 }
2416 else
2417 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2418 }
2419 else
2420 {
2421 bfd_boolean warned ATTRIBUTE_UNUSED;
2422 bfd_boolean ignored ATTRIBUTE_UNUSED;
2423
2424 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2425 r_symndx, symtab_hdr, sym_hashes,
2426 h, sec, relocation,
2427 unresolved_reloc, warned, ignored);
2428 }
2429
2430 if (sec != NULL && discarded_section (sec))
2431 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2432 rel, 1, relend, howto, 0, contents);
2433
2434 if (bfd_link_relocatable (info))
2435 continue;
2436
2437 switch (r_type)
2438 {
2439 case R_390_GOTPLT12:
2440 case R_390_GOTPLT16:
2441 case R_390_GOTPLT20:
2442 case R_390_GOTPLT32:
2443 case R_390_GOTPLT64:
2444 case R_390_GOTPLTENT:
2445 /* There are three cases for a GOTPLT relocation. 1) The
2446 relocation is against the jump slot entry of a plt that
2447 will get emitted to the output file. 2) The relocation
2448 is against the jump slot of a plt entry that has been
2449 removed. elf_s390_adjust_gotplt has created a GOT entry
2450 as replacement. 3) The relocation is against a local symbol.
2451 Cases 2) and 3) are the same as the GOT relocation code
2452 so we just have to test for case 1 and fall through for
2453 the other two. */
2454 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2455 {
2456 bfd_vma plt_index;
2457
2458 if (s390_is_ifunc_symbol_p (h))
2459 {
2460 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2461 relocation = (plt_index * GOT_ENTRY_SIZE +
2462 htab->elf.igotplt->output_offset);
2463 if (r_type == R_390_GOTPLTENT)
2464 relocation += htab->elf.igotplt->output_section->vma;
2465 }
2466 else
2467 {
2468 /* Calc. index no.
2469 Current offset - size first entry / entry size. */
2470 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2471 PLT_ENTRY_SIZE;
2472
2473 /* Offset in GOT is PLT index plus GOT headers(3)
2474 times 4, addr & GOT addr. */
2475 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2476 if (r_type == R_390_GOTPLTENT)
2477 relocation += htab->elf.sgot->output_section->vma;
2478 }
2479 unresolved_reloc = FALSE;
2480 break;
2481 }
2482 /* Fall through. */
2483
2484 case R_390_GOT12:
2485 case R_390_GOT16:
2486 case R_390_GOT20:
2487 case R_390_GOT32:
2488 case R_390_GOT64:
2489 case R_390_GOTENT:
2490 /* Relocation is to the entry for this symbol in the global
2491 offset table. */
2492 if (base_got == NULL)
2493 abort ();
2494
2495 if (h != NULL)
2496 {
2497 bfd_boolean dyn;
2498
2499 off = h->got.offset;
2500 dyn = htab->elf.dynamic_sections_created;
2501
2502 if (s390_is_ifunc_symbol_p (h))
2503 {
2504 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2505 if (off == (bfd_vma)-1)
2506 {
2507 /* No explicit GOT usage so redirect to the
2508 got.iplt slot. */
2509 base_got = htab->elf.igotplt;
2510 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2511 }
2512 else
2513 {
2514 /* Explicit GOT slots must contain the address
2515 of the PLT slot. This will be handled in
2516 finish_dynamic_symbol. */
2517 }
2518 }
2519 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2520 bfd_link_pic (info),
2521 h)
2522 || (bfd_link_pic (info)
2523 && SYMBOL_REFERENCES_LOCAL (info, h))
2524 || (ELF_ST_VISIBILITY (h->other)
2525 && h->root.type == bfd_link_hash_undefweak))
2526 {
2527 /* This is actually a static link, or it is a
2528 -Bsymbolic link and the symbol is defined
2529 locally, or the symbol was forced to be local
2530 because of a version file. We must initialize
2531 this entry in the global offset table. Since the
2532 offset must always be a multiple of 2, we use the
2533 least significant bit to record whether we have
2534 initialized it already.
2535
2536 When doing a dynamic link, we create a .rel.got
2537 relocation entry to initialize the value. This
2538 is done in the finish_dynamic_symbol routine. */
2539 if ((off & 1) != 0)
2540 off &= ~1;
2541 else
2542 {
2543 bfd_put_64 (output_bfd, relocation,
2544 base_got->contents + off);
2545 h->got.offset |= 1;
2546 }
2547
2548 if ((h->def_regular
2549 && bfd_link_pic (info)
2550 && SYMBOL_REFERENCES_LOCAL (info, h))
2551 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2552 && ((r_type == R_390_GOTENT
2553 && (bfd_get_16 (input_bfd,
2554 contents + rel->r_offset - 2)
2555 & 0xff0f) == 0xc408)
2556 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2557 || (r_type == R_390_GOT20
2558 && (bfd_get_32 (input_bfd,
2559 contents + rel->r_offset - 2)
2560 & 0xff00f000) == 0xe300c000
2561 && bfd_get_8 (input_bfd,
2562 contents + rel->r_offset + 3) == 0x04)))
2563
2564 {
2565 unsigned short new_insn =
2566 (0xc000 | (bfd_get_8 (input_bfd,
2567 contents + rel->r_offset - 1) & 0xf0));
2568 bfd_put_16 (output_bfd, new_insn,
2569 contents + rel->r_offset - 2);
2570 r_type = R_390_PC32DBL;
2571 rel->r_addend = 2;
2572 howto = elf_howto_table + r_type;
2573 relocation = h->root.u.def.value
2574 + h->root.u.def.section->output_section->vma
2575 + h->root.u.def.section->output_offset;
2576 goto do_relocation;
2577 }
2578 }
2579 else
2580 unresolved_reloc = FALSE;
2581 }
2582 else
2583 {
2584 if (local_got_offsets == NULL)
2585 abort ();
2586
2587 off = local_got_offsets[r_symndx];
2588
2589 /* The offset must always be a multiple of 8. We use
2590 the least significant bit to record whether we have
2591 already generated the necessary reloc. */
2592 if ((off & 1) != 0)
2593 off &= ~1;
2594 else
2595 {
2596 bfd_put_64 (output_bfd, relocation,
2597 htab->elf.sgot->contents + off);
2598
2599 if (bfd_link_pic (info))
2600 {
2601 asection *s;
2602 Elf_Internal_Rela outrel;
2603 bfd_byte *loc;
2604
2605 s = htab->elf.srelgot;
2606 if (s == NULL)
2607 abort ();
2608
2609 outrel.r_offset = (htab->elf.sgot->output_section->vma
2610 + htab->elf.sgot->output_offset
2611 + off);
2612 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2613 outrel.r_addend = relocation;
2614 loc = s->contents;
2615 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2616 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2617 }
2618
2619 local_got_offsets[r_symndx] |= 1;
2620 }
2621 }
2622
2623 if (off >= (bfd_vma) -2)
2624 abort ();
2625
2626 relocation = base_got->output_offset + off;
2627
2628 /* For @GOTENT the relocation is against the offset between
2629 the instruction and the symbols entry in the GOT and not
2630 between the start of the GOT and the symbols entry. We
2631 add the vma of the GOT to get the correct value. */
2632 if ( r_type == R_390_GOTENT
2633 || r_type == R_390_GOTPLTENT)
2634 relocation += base_got->output_section->vma;
2635
2636 break;
2637
2638 case R_390_GOTOFF16:
2639 case R_390_GOTOFF32:
2640 case R_390_GOTOFF64:
2641 /* Relocation is relative to the start of the global offset
2642 table. */
2643
2644 /* Note that sgot->output_offset is not involved in this
2645 calculation. We always want the start of .got. If we
2646 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2647 permitted by the ABI, we might have to change this
2648 calculation. */
2649 relocation -= htab->elf.sgot->output_section->vma;
2650 break;
2651
2652 case R_390_GOTPC:
2653 case R_390_GOTPCDBL:
2654 /* Use global offset table as symbol value. */
2655 relocation = htab->elf.sgot->output_section->vma;
2656 unresolved_reloc = FALSE;
2657 break;
2658
2659 case R_390_PLT12DBL:
2660 case R_390_PLT16DBL:
2661 case R_390_PLT24DBL:
2662 case R_390_PLT32:
2663 case R_390_PLT32DBL:
2664 case R_390_PLT64:
2665 /* Relocation is to the entry for this symbol in the
2666 procedure linkage table. */
2667
2668 /* Resolve a PLT32 reloc against a local symbol directly,
2669 without using the procedure linkage table. */
2670 if (h == NULL)
2671 break;
2672
2673 if (h->plt.offset == (bfd_vma) -1
2674 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2675 {
2676 /* We didn't make a PLT entry for this symbol. This
2677 happens when statically linking PIC code, or when
2678 using -Bsymbolic. */
2679 break;
2680 }
2681 if (s390_is_ifunc_symbol_p (h))
2682 relocation = (htab->elf.iplt->output_section->vma
2683 + htab->elf.iplt->output_offset
2684 + h->plt.offset);
2685 else
2686 relocation = (htab->elf.splt->output_section->vma
2687 + htab->elf.splt->output_offset
2688 + h->plt.offset);
2689 unresolved_reloc = FALSE;
2690 break;
2691
2692 case R_390_PLTOFF16:
2693 case R_390_PLTOFF32:
2694 case R_390_PLTOFF64:
2695 /* Relocation is to the entry for this symbol in the
2696 procedure linkage table relative to the start of the GOT. */
2697
2698 /* For local symbols or if we didn't make a PLT entry for
2699 this symbol resolve the symbol directly. */
2700 if (h == NULL
2701 || h->plt.offset == (bfd_vma) -1
2702 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2703 {
2704 relocation -= htab->elf.sgot->output_section->vma;
2705 break;
2706 }
2707
2708 if (s390_is_ifunc_symbol_p (h))
2709 relocation = (htab->elf.iplt->output_section->vma
2710 + htab->elf.iplt->output_offset
2711 + h->plt.offset
2712 - htab->elf.sgot->output_section->vma);
2713 else
2714 relocation = (htab->elf.splt->output_section->vma
2715 + htab->elf.splt->output_offset
2716 + h->plt.offset
2717 - htab->elf.sgot->output_section->vma);
2718 unresolved_reloc = FALSE;
2719 break;
2720
2721 case R_390_PC16:
2722 case R_390_PC12DBL:
2723 case R_390_PC16DBL:
2724 case R_390_PC24DBL:
2725 case R_390_PC32:
2726 case R_390_PC32DBL:
2727 case R_390_PC64:
2728 /* The target of these relocs are instruction operands
2729 residing in read-only sections. We cannot emit a runtime
2730 reloc for it. */
2731 if (h != NULL
2732 && s390_is_ifunc_symbol_p (h)
2733 && h->def_regular
2734 && bfd_link_pic (info))
2735 {
2736 relocation = (htab->elf.iplt->output_section->vma
2737 + htab->elf.iplt->output_offset
2738 + h->plt.offset);
2739 goto do_relocation;
2740 }
2741
2742 case R_390_8:
2743 case R_390_16:
2744 case R_390_32:
2745 case R_390_64:
2746
2747 if (h != NULL
2748 && s390_is_ifunc_symbol_p (h)
2749 && h->def_regular)
2750 {
2751 if (!bfd_link_pic (info) || !h->non_got_ref)
2752 {
2753 /* For a non-shared object STT_GNU_IFUNC symbol must
2754 go through PLT. */
2755 relocation = (htab->elf.iplt->output_section->vma
2756 + htab->elf.iplt->output_offset
2757 + h ->plt.offset);
2758 goto do_relocation;
2759 }
2760 else
2761 {
2762 /* For shared objects a runtime relocation is needed. */
2763
2764 Elf_Internal_Rela outrel;
2765 asection *sreloc;
2766
2767 /* Need a dynamic relocation to get the real function
2768 address. */
2769 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2770 info,
2771 input_section,
2772 rel->r_offset);
2773 if (outrel.r_offset == (bfd_vma) -1
2774 || outrel.r_offset == (bfd_vma) -2)
2775 abort ();
2776
2777 outrel.r_offset += (input_section->output_section->vma
2778 + input_section->output_offset);
2779
2780 if (h->dynindx == -1
2781 || h->forced_local
2782 || bfd_link_executable (info))
2783 {
2784 /* This symbol is resolved locally. */
2785 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2786 outrel.r_addend = (h->root.u.def.value
2787 + h->root.u.def.section->output_section->vma
2788 + h->root.u.def.section->output_offset);
2789 }
2790 else
2791 {
2792 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2793 outrel.r_addend = 0;
2794 }
2795
2796 sreloc = htab->elf.irelifunc;
2797 elf_append_rela (output_bfd, sreloc, &outrel);
2798
2799 /* If this reloc is against an external symbol, we
2800 do not want to fiddle with the addend. Otherwise,
2801 we need to include the symbol value so that it
2802 becomes an addend for the dynamic reloc. For an
2803 internal symbol, we have updated addend. */
2804 continue;
2805 }
2806 }
2807
2808 if ((input_section->flags & SEC_ALLOC) == 0)
2809 break;
2810
2811 if ((bfd_link_pic (info)
2812 && (h == NULL
2813 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2814 || h->root.type != bfd_link_hash_undefweak)
2815 && ((r_type != R_390_PC16
2816 && r_type != R_390_PC12DBL
2817 && r_type != R_390_PC16DBL
2818 && r_type != R_390_PC24DBL
2819 && r_type != R_390_PC32
2820 && r_type != R_390_PC32DBL
2821 && r_type != R_390_PC64)
2822 || !SYMBOL_CALLS_LOCAL (info, h)))
2823 || (ELIMINATE_COPY_RELOCS
2824 && !bfd_link_pic (info)
2825 && h != NULL
2826 && h->dynindx != -1
2827 && !h->non_got_ref
2828 && ((h->def_dynamic
2829 && !h->def_regular)
2830 || h->root.type == bfd_link_hash_undefweak
2831 || h->root.type == bfd_link_hash_undefined)))
2832 {
2833 Elf_Internal_Rela outrel;
2834 bfd_boolean skip, relocate;
2835 asection *sreloc;
2836 bfd_byte *loc;
2837
2838 /* When generating a shared object, these relocations
2839 are copied into the output file to be resolved at run
2840 time. */
2841 skip = FALSE;
2842 relocate = FALSE;
2843
2844 outrel.r_offset =
2845 _bfd_elf_section_offset (output_bfd, info, input_section,
2846 rel->r_offset);
2847 if (outrel.r_offset == (bfd_vma) -1)
2848 skip = TRUE;
2849 else if (outrel.r_offset == (bfd_vma) -2)
2850 skip = TRUE, relocate = TRUE;
2851
2852 outrel.r_offset += (input_section->output_section->vma
2853 + input_section->output_offset);
2854
2855 if (skip)
2856 memset (&outrel, 0, sizeof outrel);
2857 else if (h != NULL
2858 && h->dynindx != -1
2859 && (r_type == R_390_PC16
2860 || r_type == R_390_PC12DBL
2861 || r_type == R_390_PC16DBL
2862 || r_type == R_390_PC24DBL
2863 || r_type == R_390_PC32
2864 || r_type == R_390_PC32DBL
2865 || r_type == R_390_PC64
2866 || !bfd_link_pic (info)
2867 || !SYMBOLIC_BIND (info, h)
2868 || !h->def_regular))
2869 {
2870 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2871 outrel.r_addend = rel->r_addend;
2872 }
2873 else
2874 {
2875 /* This symbol is local, or marked to become local. */
2876 outrel.r_addend = relocation + rel->r_addend;
2877 if (r_type == R_390_64)
2878 {
2879 relocate = TRUE;
2880 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2881 }
2882 else
2883 {
2884 long sindx;
2885
2886 if (bfd_is_abs_section (sec))
2887 sindx = 0;
2888 else if (sec == NULL || sec->owner == NULL)
2889 {
2890 bfd_set_error(bfd_error_bad_value);
2891 return FALSE;
2892 }
2893 else
2894 {
2895 asection *osec;
2896
2897 osec = sec->output_section;
2898 sindx = elf_section_data (osec)->dynindx;
2899
2900 if (sindx == 0)
2901 {
2902 osec = htab->elf.text_index_section;
2903 sindx = elf_section_data (osec)->dynindx;
2904 }
2905 BFD_ASSERT (sindx != 0);
2906
2907 /* We are turning this relocation into one
2908 against a section symbol, so subtract out
2909 the output section's address but not the
2910 offset of the input section in the output
2911 section. */
2912 outrel.r_addend -= osec->vma;
2913 }
2914 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2915 }
2916 }
2917
2918 sreloc = elf_section_data (input_section)->sreloc;
2919 if (sreloc == NULL)
2920 abort ();
2921
2922 loc = sreloc->contents;
2923 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2924 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2925
2926 /* If this reloc is against an external symbol, we do
2927 not want to fiddle with the addend. Otherwise, we
2928 need to include the symbol value so that it becomes
2929 an addend for the dynamic reloc. */
2930 if (! relocate)
2931 continue;
2932 }
2933
2934 break;
2935
2936 /* Relocations for tls literal pool entries. */
2937 case R_390_TLS_IE64:
2938 if (bfd_link_pic (info))
2939 {
2940 Elf_Internal_Rela outrel;
2941 asection *sreloc;
2942 bfd_byte *loc;
2943
2944 outrel.r_offset = rel->r_offset
2945 + input_section->output_section->vma
2946 + input_section->output_offset;
2947 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2948 sreloc = elf_section_data (input_section)->sreloc;
2949 if (sreloc == NULL)
2950 abort ();
2951 loc = sreloc->contents;
2952 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2953 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2954 }
2955 /* Fall through. */
2956
2957 case R_390_TLS_GD64:
2958 case R_390_TLS_GOTIE64:
2959 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2960 tls_type = GOT_UNKNOWN;
2961 if (h == NULL && local_got_offsets)
2962 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2963 else if (h != NULL)
2964 {
2965 tls_type = elf_s390_hash_entry(h)->tls_type;
2966 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2967 r_type = R_390_TLS_LE64;
2968 }
2969 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2970 r_type = R_390_TLS_IE64;
2971
2972 if (r_type == R_390_TLS_LE64)
2973 {
2974 /* This relocation gets optimized away by the local exec
2975 access optimization. */
2976 BFD_ASSERT (! unresolved_reloc);
2977 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2978 contents + rel->r_offset);
2979 continue;
2980 }
2981
2982 if (htab->elf.sgot == NULL)
2983 abort ();
2984
2985 if (h != NULL)
2986 off = h->got.offset;
2987 else
2988 {
2989 if (local_got_offsets == NULL)
2990 abort ();
2991
2992 off = local_got_offsets[r_symndx];
2993 }
2994
2995 emit_tls_relocs:
2996
2997 if ((off & 1) != 0)
2998 off &= ~1;
2999 else
3000 {
3001 Elf_Internal_Rela outrel;
3002 bfd_byte *loc;
3003 int dr_type, indx;
3004
3005 if (htab->elf.srelgot == NULL)
3006 abort ();
3007
3008 outrel.r_offset = (htab->elf.sgot->output_section->vma
3009 + htab->elf.sgot->output_offset + off);
3010
3011 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3012 if (r_type == R_390_TLS_GD64)
3013 dr_type = R_390_TLS_DTPMOD;
3014 else
3015 dr_type = R_390_TLS_TPOFF;
3016 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3017 outrel.r_addend = relocation - dtpoff_base (info);
3018 else
3019 outrel.r_addend = 0;
3020 outrel.r_info = ELF64_R_INFO (indx, dr_type);
3021 loc = htab->elf.srelgot->contents;
3022 loc += htab->elf.srelgot->reloc_count++
3023 * sizeof (Elf64_External_Rela);
3024 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3025
3026 if (r_type == R_390_TLS_GD64)
3027 {
3028 if (indx == 0)
3029 {
3030 BFD_ASSERT (! unresolved_reloc);
3031 bfd_put_64 (output_bfd,
3032 relocation - dtpoff_base (info),
3033 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3034 }
3035 else
3036 {
3037 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
3038 outrel.r_offset += GOT_ENTRY_SIZE;
3039 outrel.r_addend = 0;
3040 htab->elf.srelgot->reloc_count++;
3041 loc += sizeof (Elf64_External_Rela);
3042 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3043 }
3044 }
3045
3046 if (h != NULL)
3047 h->got.offset |= 1;
3048 else
3049 local_got_offsets[r_symndx] |= 1;
3050 }
3051
3052 if (off >= (bfd_vma) -2)
3053 abort ();
3054 if (r_type == ELF64_R_TYPE (rel->r_info))
3055 {
3056 relocation = htab->elf.sgot->output_offset + off;
3057 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3058 relocation += htab->elf.sgot->output_section->vma;
3059 unresolved_reloc = FALSE;
3060 }
3061 else
3062 {
3063 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3064 contents + rel->r_offset);
3065 continue;
3066 }
3067 break;
3068
3069 case R_390_TLS_GOTIE12:
3070 case R_390_TLS_GOTIE20:
3071 case R_390_TLS_IEENT:
3072 if (h == NULL)
3073 {
3074 if (local_got_offsets == NULL)
3075 abort();
3076 off = local_got_offsets[r_symndx];
3077 if (bfd_link_pic (info))
3078 goto emit_tls_relocs;
3079 }
3080 else
3081 {
3082 off = h->got.offset;
3083 tls_type = elf_s390_hash_entry(h)->tls_type;
3084 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3085 goto emit_tls_relocs;
3086 }
3087
3088 if (htab->elf.sgot == NULL)
3089 abort ();
3090
3091 BFD_ASSERT (! unresolved_reloc);
3092 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3093 htab->elf.sgot->contents + off);
3094 relocation = htab->elf.sgot->output_offset + off;
3095 if (r_type == R_390_TLS_IEENT)
3096 relocation += htab->elf.sgot->output_section->vma;
3097 unresolved_reloc = FALSE;
3098 break;
3099
3100 case R_390_TLS_LDM64:
3101 if (! bfd_link_pic (info))
3102 /* The literal pool entry this relocation refers to gets ignored
3103 by the optimized code of the local exec model. Do nothing
3104 and the value will turn out zero. */
3105 continue;
3106
3107 if (htab->elf.sgot == NULL)
3108 abort ();
3109
3110 off = htab->tls_ldm_got.offset;
3111 if (off & 1)
3112 off &= ~1;
3113 else
3114 {
3115 Elf_Internal_Rela outrel;
3116 bfd_byte *loc;
3117
3118 if (htab->elf.srelgot == NULL)
3119 abort ();
3120
3121 outrel.r_offset = (htab->elf.sgot->output_section->vma
3122 + htab->elf.sgot->output_offset + off);
3123
3124 bfd_put_64 (output_bfd, 0,
3125 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3126 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3127 outrel.r_addend = 0;
3128 loc = htab->elf.srelgot->contents;
3129 loc += htab->elf.srelgot->reloc_count++
3130 * sizeof (Elf64_External_Rela);
3131 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3132 htab->tls_ldm_got.offset |= 1;
3133 }
3134 relocation = htab->elf.sgot->output_offset + off;
3135 unresolved_reloc = FALSE;
3136 break;
3137
3138 case R_390_TLS_LE64:
3139 if (bfd_link_dll (info))
3140 {
3141 /* Linking a shared library with non-fpic code requires
3142 a R_390_TLS_TPOFF relocation. */
3143 Elf_Internal_Rela outrel;
3144 asection *sreloc;
3145 bfd_byte *loc;
3146 int indx;
3147
3148 outrel.r_offset = rel->r_offset
3149 + input_section->output_section->vma
3150 + input_section->output_offset;
3151 if (h != NULL && h->dynindx != -1)
3152 indx = h->dynindx;
3153 else
3154 indx = 0;
3155 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3156 if (indx == 0)
3157 outrel.r_addend = relocation - dtpoff_base (info);
3158 else
3159 outrel.r_addend = 0;
3160 sreloc = elf_section_data (input_section)->sreloc;
3161 if (sreloc == NULL)
3162 abort ();
3163 loc = sreloc->contents;
3164 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3165 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3166 }
3167 else
3168 {
3169 BFD_ASSERT (! unresolved_reloc);
3170 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3171 contents + rel->r_offset);
3172 }
3173 continue;
3174
3175 case R_390_TLS_LDO64:
3176 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3177 relocation -= dtpoff_base (info);
3178 else
3179 /* When converting LDO to LE, we must negate. */
3180 relocation = -tpoff (info, relocation);
3181 break;
3182
3183 /* Relocations for tls instructions. */
3184 case R_390_TLS_LOAD:
3185 case R_390_TLS_GDCALL:
3186 case R_390_TLS_LDCALL:
3187 tls_type = GOT_UNKNOWN;
3188 if (h == NULL && local_got_offsets)
3189 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3190 else if (h != NULL)
3191 tls_type = elf_s390_hash_entry(h)->tls_type;
3192
3193 if (tls_type == GOT_TLS_GD)
3194 continue;
3195
3196 if (r_type == R_390_TLS_LOAD)
3197 {
3198 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3199 {
3200 /* IE->LE transition. Four valid cases:
3201 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3202 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3203 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3204 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3205 unsigned int insn0, insn1, ry;
3206
3207 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3208 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3209 if (insn1 != 0x0004)
3210 invalid_tls_insn (input_bfd, input_section, rel);
3211 ry = 0;
3212 if ((insn0 & 0xff00f000) == 0xe3000000)
3213 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3214 ry = (insn0 & 0x000f0000);
3215 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3216 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3217 ry = (insn0 & 0x0000f000) << 4;
3218 else if ((insn0 & 0xff00f000) == 0xe300c000)
3219 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3220 ry = (insn0 & 0x000f0000);
3221 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3222 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3223 ry = (insn0 & 0x0000f000) << 4;
3224 else
3225 invalid_tls_insn (input_bfd, input_section, rel);
3226 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3227 insn1 = 0x000d;
3228 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3229 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3230 }
3231 }
3232 else if (r_type == R_390_TLS_GDCALL)
3233 {
3234 unsigned int insn0, insn1;
3235
3236 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3237 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3238 if ((insn0 & 0xffff0000) != 0xc0e50000)
3239 invalid_tls_insn (input_bfd, input_section, rel);
3240 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3241 {
3242 /* GD->LE transition.
3243 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3244 insn0 = 0xc0040000;
3245 insn1 = 0x0000;
3246 }
3247 else
3248 {
3249 /* GD->IE transition.
3250 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3251 insn0 = 0xe322c000;
3252 insn1 = 0x0004;
3253 }
3254 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3255 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3256 }
3257 else if (r_type == R_390_TLS_LDCALL)
3258 {
3259 if (!bfd_link_pic (info))
3260 {
3261 unsigned int insn0, insn1;
3262
3263 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3264 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3265 if ((insn0 & 0xffff0000) != 0xc0e50000)
3266 invalid_tls_insn (input_bfd, input_section, rel);
3267 /* LD->LE transition.
3268 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3269 insn0 = 0xc0040000;
3270 insn1 = 0x0000;
3271 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3272 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3273 }
3274 }
3275 continue;
3276
3277 default:
3278 break;
3279 }
3280
3281 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3282 because such sections are not SEC_ALLOC and thus ld.so will
3283 not process them. */
3284 if (unresolved_reloc
3285 && !((input_section->flags & SEC_DEBUGGING) != 0
3286 && h->def_dynamic)
3287 && _bfd_elf_section_offset (output_bfd, info, input_section,
3288 rel->r_offset) != (bfd_vma) -1)
3289 (*_bfd_error_handler)
3290 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3291 input_bfd,
3292 input_section,
3293 (long) rel->r_offset,
3294 howto->name,
3295 h->root.root.string);
3296
3297 do_relocation:
3298
3299 /* When applying a 24 bit reloc we need to start one byte
3300 earlier. Otherwise the 32 bit get/put bfd operations might
3301 access a byte after the actual section. */
3302 if (r_type == R_390_PC24DBL
3303 || r_type == R_390_PLT24DBL)
3304 rel->r_offset--;
3305
3306 if (r_type == R_390_20
3307 || r_type == R_390_GOT20
3308 || r_type == R_390_GOTPLT20
3309 || r_type == R_390_TLS_GOTIE20)
3310 {
3311 relocation += rel->r_addend;
3312 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3313 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3314 contents, rel->r_offset,
3315 relocation, 0);
3316 }
3317 else
3318 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3319 contents, rel->r_offset,
3320 relocation, rel->r_addend);
3321
3322 if (r != bfd_reloc_ok)
3323 {
3324 const char *name;
3325
3326 if (h != NULL)
3327 name = h->root.root.string;
3328 else
3329 {
3330 name = bfd_elf_string_from_elf_section (input_bfd,
3331 symtab_hdr->sh_link,
3332 sym->st_name);
3333 if (name == NULL)
3334 return FALSE;
3335 if (*name == '\0')
3336 name = bfd_section_name (input_bfd, sec);
3337 }
3338
3339 if (r == bfd_reloc_overflow)
3340 {
3341
3342 if (! ((*info->callbacks->reloc_overflow)
3343 (info, (h ? &h->root : NULL), name, howto->name,
3344 (bfd_vma) 0, input_bfd, input_section,
3345 rel->r_offset)))
3346 return FALSE;
3347 }
3348 else
3349 {
3350 (*_bfd_error_handler)
3351 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3352 input_bfd, input_section,
3353 (long) rel->r_offset, name, (int) r);
3354 return FALSE;
3355 }
3356 }
3357 }
3358
3359 return TRUE;
3360}
3361
3362/* Generate the PLT slots together with the dynamic relocations needed
3363 for IFUNC symbols. */
3364
3365static void
3366elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3367 struct bfd_link_info *info,
3368 struct elf_link_hash_entry *h,
3369 struct elf_s390_link_hash_table *htab,
3370 bfd_vma plt_offset,
3371 bfd_vma resolver_address)
3372{
3373 bfd_vma plt_index;
3374 bfd_vma got_offset;
3375 Elf_Internal_Rela rela;
3376 bfd_byte *loc;
3377 asection *plt, *gotplt, *relplt;
3378
3379 if (htab->elf.iplt == NULL
3380 || htab->elf.igotplt == NULL
3381 || htab->elf.irelplt == NULL)
3382 abort ();
3383
3384 /* Index of the PLT slot within iplt section. */
3385 plt_index = plt_offset / PLT_ENTRY_SIZE;
3386 plt = htab->elf.iplt;
3387 /* Offset into the igot.plt section. */
3388 got_offset = plt_index * GOT_ENTRY_SIZE;
3389 gotplt = htab->elf.igotplt;
3390 relplt = htab->elf.irelplt;
3391
3392 /* Fill in the blueprint of a PLT. */
3393 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3394 PLT_ENTRY_SIZE);
3395
3396 /* Fixup the relative address to the GOT entry */
3397 bfd_put_32 (output_bfd,
3398 (gotplt->output_section->vma +
3399 gotplt->output_offset + got_offset
3400 - (plt->output_section->vma +
3401 plt->output_offset +
3402 plt_offset))/2,
3403 plt->contents + plt_offset + 2);
3404 /* Fixup the relative branch to PLT 0 */
3405 bfd_put_32 (output_bfd, - (plt->output_offset +
3406 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3407 plt->contents + plt_offset + 24);
3408 /* Fixup offset into .rela.plt section. */
3409 bfd_put_32 (output_bfd, relplt->output_offset +
3410 plt_index * sizeof (Elf64_External_Rela),
3411 plt->contents + plt_offset + 28);
3412
3413 /* Fill in the entry in the global offset table.
3414 Points to instruction after GOT offset. */
3415 bfd_put_64 (output_bfd,
3416 (plt->output_section->vma
3417 + plt->output_offset
3418 + plt_offset
3419 + 14),
3420 gotplt->contents + got_offset);
3421
3422 /* Fill in the entry in the .rela.plt section. */
3423 rela.r_offset = (gotplt->output_section->vma
3424 + gotplt->output_offset
3425 + got_offset);
3426
3427 if (!h
3428 || h->dynindx == -1
3429 || ((bfd_link_executable (info)
3430 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3431 && h->def_regular))
3432 {
3433 /* The symbol can be locally resolved. */
3434 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3435 rela.r_addend = resolver_address;
3436 }
3437 else
3438 {
3439 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3440 rela.r_addend = 0;
3441 }
3442
3443 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3444 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3445}
3446
3447
3448/* Finish up dynamic symbol handling. We set the contents of various
3449 dynamic sections here. */
3450
3451static bfd_boolean
3452elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3453 struct bfd_link_info *info,
3454 struct elf_link_hash_entry *h,
3455 Elf_Internal_Sym *sym)
3456{
3457 struct elf_s390_link_hash_table *htab;
3458 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3459
3460 htab = elf_s390_hash_table (info);
3461 if (htab == NULL)
3462 return FALSE;
3463
3464 if (h->plt.offset != (bfd_vma) -1)
3465 {
3466 bfd_vma plt_index;
3467 bfd_vma got_offset;
3468 Elf_Internal_Rela rela;
3469 bfd_byte *loc;
3470
3471 /* This symbol has an entry in the procedure linkage table. Set
3472 it up. */
3473 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3474 {
3475 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3476 htab, h->plt.offset,
3477 eh->ifunc_resolver_address +
3478 eh->ifunc_resolver_section->output_offset +
3479 eh->ifunc_resolver_section->output_section->vma);
3480
3481 /* Do not return yet. Handling of explicit GOT slots of
3482 IFUNC symbols is below. */
3483 }
3484 else
3485 {
3486 if (h->dynindx == -1
3487 || htab->elf.splt == NULL
3488 || htab->elf.sgotplt == NULL
3489 || htab->elf.srelplt == NULL)
3490 abort ();
3491
3492 /* Calc. index no.
3493 Current offset - size first entry / entry size. */
3494 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3495
3496 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3497 addr & GOT addr. */
3498 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3499
3500 /* Fill in the blueprint of a PLT. */
3501 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3502 PLT_ENTRY_SIZE);
3503
3504 /* Fixup the relative address to the GOT entry */
3505 bfd_put_32 (output_bfd,
3506 (htab->elf.sgotplt->output_section->vma +
3507 htab->elf.sgotplt->output_offset + got_offset
3508 - (htab->elf.splt->output_section->vma +
3509 htab->elf.splt->output_offset +
3510 h->plt.offset))/2,
3511 htab->elf.splt->contents + h->plt.offset + 2);
3512 /* Fixup the relative branch to PLT 0 */
3513 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3514 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3515 htab->elf.splt->contents + h->plt.offset + 24);
3516 /* Fixup offset into .rela.plt section. */
3517 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3518 htab->elf.splt->contents + h->plt.offset + 28);
3519
3520 /* Fill in the entry in the global offset table.
3521 Points to instruction after GOT offset. */
3522 bfd_put_64 (output_bfd,
3523 (htab->elf.splt->output_section->vma
3524 + htab->elf.splt->output_offset
3525 + h->plt.offset
3526 + 14),
3527 htab->elf.sgotplt->contents + got_offset);
3528
3529 /* Fill in the entry in the .rela.plt section. */
3530 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3531 + htab->elf.sgotplt->output_offset
3532 + got_offset);
3533 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3534 rela.r_addend = 0;
3535 loc = htab->elf.srelplt->contents + plt_index *
3536 sizeof (Elf64_External_Rela);
3537 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3538
3539 if (!h->def_regular)
3540 {
3541 /* Mark the symbol as undefined, rather than as defined in
3542 the .plt section. Leave the value alone. This is a clue
3543 for the dynamic linker, to make function pointer
3544 comparisons work between an application and shared
3545 library. */
3546 sym->st_shndx = SHN_UNDEF;
3547 }
3548 }
3549 }
3550
3551 if (h->got.offset != (bfd_vma) -1
3552 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3553 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3554 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3555 {
3556 Elf_Internal_Rela rela;
3557 bfd_byte *loc;
3558
3559 /* This symbol has an entry in the global offset table. Set it
3560 up. */
3561 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3562 abort ();
3563
3564 rela.r_offset = (htab->elf.sgot->output_section->vma
3565 + htab->elf.sgot->output_offset
3566 + (h->got.offset &~ (bfd_vma) 1));
3567
3568 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3569 {
3570 if (bfd_link_pic (info))
3571 {
3572 /* An explicit GOT slot usage needs GLOB_DAT. If the
3573 symbol references local the implicit got.iplt slot
3574 will be used and the IRELATIVE reloc has been created
3575 above. */
3576 goto do_glob_dat;
3577 }
3578 else
3579 {
3580 /* For non-shared objects explicit GOT slots must be
3581 filled with the PLT slot address for pointer
3582 equality reasons. */
3583 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3584 + htab->elf.iplt->output_offset
3585 + h->plt.offset),
3586 htab->elf.sgot->contents + h->got.offset);
3587 return TRUE;
3588 }
3589 }
3590 else if (bfd_link_pic (info)
3591 && SYMBOL_REFERENCES_LOCAL (info, h))
3592 {
3593 /* If this is a static link, or it is a -Bsymbolic link and
3594 the symbol is defined locally or was forced to be local
3595 because of a version file, we just want to emit a
3596 RELATIVE reloc. The entry in the global offset table
3597 will already have been initialized in the
3598 relocate_section function. */
3599 if (!h->def_regular)
3600 return FALSE;
3601 BFD_ASSERT((h->got.offset & 1) != 0);
3602 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3603 rela.r_addend = (h->root.u.def.value
3604 + h->root.u.def.section->output_section->vma
3605 + h->root.u.def.section->output_offset);
3606 }
3607 else
3608 {
3609 BFD_ASSERT((h->got.offset & 1) == 0);
3610do_glob_dat:
3611 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3612 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3613 rela.r_addend = 0;
3614 }
3615
3616 loc = htab->elf.srelgot->contents;
3617 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3618 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3619 }
3620
3621 if (h->needs_copy)
3622 {
3623 Elf_Internal_Rela rela;
3624 bfd_byte *loc;
3625
3626 /* This symbols needs a copy reloc. Set it up. */
3627
3628 if (h->dynindx == -1
3629 || (h->root.type != bfd_link_hash_defined
3630 && h->root.type != bfd_link_hash_defweak)
3631 || htab->srelbss == NULL)
3632 abort ();
3633
3634 rela.r_offset = (h->root.u.def.value
3635 + h->root.u.def.section->output_section->vma
3636 + h->root.u.def.section->output_offset);
3637 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3638 rela.r_addend = 0;
3639 loc = htab->srelbss->contents;
3640 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3641 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3642 }
3643
3644 /* Mark some specially defined symbols as absolute. */
3645 if (h == htab->elf.hdynamic
3646 || h == htab->elf.hgot
3647 || h == htab->elf.hplt)
3648 sym->st_shndx = SHN_ABS;
3649
3650 return TRUE;
3651}
3652
3653/* Used to decide how to sort relocs in an optimal manner for the
3654 dynamic linker, before writing them out. */
3655
3656static enum elf_reloc_type_class
3657elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3658 const asection *rel_sec ATTRIBUTE_UNUSED,
3659 const Elf_Internal_Rela *rela)
3660{
3661 bfd *abfd = info->output_bfd;
3662 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3663 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3664 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3665 Elf_Internal_Sym sym;
3666
3667 if (htab->elf.dynsym == NULL
3668 || !bed->s->swap_symbol_in (abfd,
3669 (htab->elf.dynsym->contents
3670 + r_symndx * bed->s->sizeof_sym),
3671 0, &sym))
3672 abort ();
3673
3674 /* Check relocation against STT_GNU_IFUNC symbol. */
3675 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3676 return reloc_class_ifunc;
3677
3678 switch ((int) ELF64_R_TYPE (rela->r_info))
3679 {
3680 case R_390_RELATIVE:
3681 return reloc_class_relative;
3682 case R_390_JMP_SLOT:
3683 return reloc_class_plt;
3684 case R_390_COPY:
3685 return reloc_class_copy;
3686 default:
3687 return reloc_class_normal;
3688 }
3689}
3690
3691/* Finish up the dynamic sections. */
3692
3693static bfd_boolean
3694elf_s390_finish_dynamic_sections (bfd *output_bfd,
3695 struct bfd_link_info *info)
3696{
3697 struct elf_s390_link_hash_table *htab;
3698 bfd *dynobj;
3699 asection *sdyn;
3700 bfd *ibfd;
3701 unsigned int i;
3702
3703 htab = elf_s390_hash_table (info);
3704 if (htab == NULL)
3705 return FALSE;
3706
3707 dynobj = htab->elf.dynobj;
3708 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3709
3710 if (htab->elf.dynamic_sections_created)
3711 {
3712 Elf64_External_Dyn *dyncon, *dynconend;
3713
3714 if (sdyn == NULL || htab->elf.sgot == NULL)
3715 abort ();
3716
3717 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3718 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3719 for (; dyncon < dynconend; dyncon++)
3720 {
3721 Elf_Internal_Dyn dyn;
3722 asection *s;
3723
3724 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3725
3726 switch (dyn.d_tag)
3727 {
3728 default:
3729 continue;
3730
3731 case DT_PLTGOT:
3732 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3733 break;
3734
3735 case DT_JMPREL:
3736 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3737 break;
3738
3739 case DT_PLTRELSZ:
3740 s = htab->elf.srelplt->output_section;
3741 dyn.d_un.d_val = s->size;
3742 break;
3743
3744 case DT_RELASZ:
3745 /* The procedure linkage table relocs (DT_JMPREL) should
3746 not be included in the overall relocs (DT_RELA).
3747 Therefore, we override the DT_RELASZ entry here to
3748 make it not include the JMPREL relocs. Since the
3749 linker script arranges for .rela.plt to follow all
3750 other relocation sections, we don't have to worry
3751 about changing the DT_RELA entry. */
3752 s = htab->elf.srelplt->output_section;
3753 dyn.d_un.d_val -= s->size;
3754 break;
3755 }
3756
3757 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3758 }
3759
3760 /* Fill in the special first entry in the procedure linkage table. */
3761 if (htab->elf.splt && htab->elf.splt->size > 0)
3762 {
3763 /* fill in blueprint for plt 0 entry */
3764 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3765 PLT_FIRST_ENTRY_SIZE);
3766 /* Fixup relative address to start of GOT */
3767 bfd_put_32 (output_bfd,
3768 (htab->elf.sgotplt->output_section->vma +
3769 htab->elf.sgotplt->output_offset
3770 - htab->elf.splt->output_section->vma - 6)/2,
3771 htab->elf.splt->contents + 8);
3772 }
3773 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3774 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3775 = PLT_ENTRY_SIZE;
3776 }
3777
3778 if (htab->elf.sgotplt)
3779 {
3780 /* Fill in the first three entries in the global offset table. */
3781 if (htab->elf.sgotplt->size > 0)
3782 {
3783 bfd_put_64 (output_bfd,
3784 (sdyn == NULL ? (bfd_vma) 0
3785 : sdyn->output_section->vma + sdyn->output_offset),
3786 htab->elf.sgotplt->contents);
3787 /* One entry for shared object struct ptr. */
3788 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3789 /* One entry for _dl_runtime_resolve. */
3790 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
3791 }
3792
3793 elf_section_data (htab->elf.sgot->output_section)
3794 ->this_hdr.sh_entsize = 8;
3795 }
3796
3797 /* Finish dynamic symbol for local IFUNC symbols. */
3798 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3799 {
3800 struct plt_entry *local_plt;
3801 Elf_Internal_Sym *isym;
3802 Elf_Internal_Shdr *symtab_hdr;
3803
3804 symtab_hdr = &elf_symtab_hdr (ibfd);
3805
3806 local_plt = elf_s390_local_plt (ibfd);
3807 if (local_plt != NULL)
3808 for (i = 0; i < symtab_hdr->sh_info; i++)
3809 {
3810 if (local_plt[i].plt.offset != (bfd_vma) -1)
3811 {
3812 asection *sec = local_plt[i].sec;
3813 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3814 if (isym == NULL)
3815 return FALSE;
3816
3817 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3818 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3819 local_plt[i].plt.offset,
3820 isym->st_value
3821 + sec->output_section->vma
3822 + sec->output_offset);
3823
3824 }
3825 }
3826 }
3827
3828 return TRUE;
3829}
3830
3831/* Return address for Ith PLT stub in section PLT, for relocation REL
3832 or (bfd_vma) -1 if it should not be included. */
3833
3834static bfd_vma
3835elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3836 const arelent *rel ATTRIBUTE_UNUSED)
3837{
3838 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3839}
3840
3841/* Merge backend specific data from an object file to the output
3842 object file when linking. */
3843
3844static bfd_boolean
3845elf64_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3846{
3847 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3848 return TRUE;
3849
3850 if (!elf_s390_merge_obj_attributes (ibfd, obfd))
3851 return FALSE;
3852
3853 return TRUE;
3854}
3855
3856/* Why was the hash table entry size definition changed from
3857 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3858 this is the only reason for the s390_elf64_size_info structure. */
3859
3860const struct elf_size_info s390_elf64_size_info =
3861{
3862 sizeof (Elf64_External_Ehdr),
3863 sizeof (Elf64_External_Phdr),
3864 sizeof (Elf64_External_Shdr),
3865 sizeof (Elf64_External_Rel),
3866 sizeof (Elf64_External_Rela),
3867 sizeof (Elf64_External_Sym),
3868 sizeof (Elf64_External_Dyn),
3869 sizeof (Elf_External_Note),
3870 8, /* hash-table entry size. */
3871 1, /* internal relocations per external relocations. */
3872 64, /* arch_size. */
3873 3, /* log_file_align. */
3874 ELFCLASS64, EV_CURRENT,
3875 bfd_elf64_write_out_phdrs,
3876 bfd_elf64_write_shdrs_and_ehdr,
3877 bfd_elf64_checksum_contents,
3878 bfd_elf64_write_relocs,
3879 bfd_elf64_swap_symbol_in,
3880 bfd_elf64_swap_symbol_out,
3881 bfd_elf64_slurp_reloc_table,
3882 bfd_elf64_slurp_symbol_table,
3883 bfd_elf64_swap_dyn_in,
3884 bfd_elf64_swap_dyn_out,
3885 bfd_elf64_swap_reloc_in,
3886 bfd_elf64_swap_reloc_out,
3887 bfd_elf64_swap_reloca_in,
3888 bfd_elf64_swap_reloca_out
3889};
3890
3891#define TARGET_BIG_SYM s390_elf64_vec
3892#define TARGET_BIG_NAME "elf64-s390"
3893#define ELF_ARCH bfd_arch_s390
3894#define ELF_TARGET_ID S390_ELF_DATA
3895#define ELF_MACHINE_CODE EM_S390
3896#define ELF_MACHINE_ALT1 EM_S390_OLD
3897#define ELF_MAXPAGESIZE 0x1000
3898
3899#define elf_backend_size_info s390_elf64_size_info
3900
3901#define elf_backend_can_gc_sections 1
3902#define elf_backend_can_refcount 1
3903#define elf_backend_want_got_plt 1
3904#define elf_backend_plt_readonly 1
3905#define elf_backend_want_plt_sym 0
3906#define elf_backend_got_header_size 24
3907#define elf_backend_rela_normal 1
3908
3909#define elf_info_to_howto elf_s390_info_to_howto
3910
3911#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3912#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3913#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3914#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3915#define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3916
3917#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3918#define elf_backend_check_relocs elf_s390_check_relocs
3919#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3920#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3921#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3922#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3923#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3924#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3925#define elf_backend_reloc_type_class elf_s390_reloc_type_class
3926#define elf_backend_relocate_section elf_s390_relocate_section
3927#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3928#define elf_backend_init_index_section _bfd_elf_init_1_index_section
3929#define elf_backend_plt_sym_val elf_s390_plt_sym_val
3930#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3931#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3932
3933#define bfd_elf64_mkobject elf_s390_mkobject
3934#define elf_backend_object_p elf_s390_object_p
3935
3936/* Enable ELF64 archive functions. */
3937#define bfd_elf64_archive_functions
3938extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
3939extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
3940
3941#define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3942#define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3943#define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3944#define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3945#define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3946#define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3947#define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3948#define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3949#define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3950
3951#include "elf64-target.h"
GDB Binutils - Deliverables
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