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S/390: Fix claimfile failures
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2017 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 #include "elf-s390.h"
29 #include <stdarg.h>
30
31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33 #define MINUS_ONE (((bfd_vma)0) - 1)
34
35 static bfd_reloc_status_type
36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
37 asection *, bfd *, char **);
38 static bfd_reloc_status_type
39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
40 asection *, bfd *, char **);
41
42 /* The relocation "howto" table. */
43 static reloc_howto_type elf_howto_table[] =
44 {
45 HOWTO (R_390_NONE, /* type */
46 0, /* rightshift */
47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
48 0, /* bitsize */
49 FALSE, /* pc_relative */
50 0, /* bitpos */
51 complain_overflow_dont, /* complain_on_overflow */
52 bfd_elf_generic_reloc, /* special_function */
53 "R_390_NONE", /* name */
54 FALSE, /* partial_inplace */
55 0, /* src_mask */
56 0, /* dst_mask */
57 FALSE), /* pcrel_offset */
58
59 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
75 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
79 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
81 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
83 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
85 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
87 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
99 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
101 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
103 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
105 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
107 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
109 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
111 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
113 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
115 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
123 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
125 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
138 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
140 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
149 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
151 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
154 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
165 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
169 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
173 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
175 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
181 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
183 };
184
185 /* GNU extension to record C++ vtable hierarchy. */
186 static reloc_howto_type elf64_s390_vtinherit_howto =
187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
188 static reloc_howto_type elf64_s390_vtentry_howto =
189 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);
190
191 static reloc_howto_type *
192 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
193 bfd_reloc_code_real_type code)
194 {
195 switch (code)
196 {
197 case BFD_RELOC_NONE:
198 return &elf_howto_table[(int) R_390_NONE];
199 case BFD_RELOC_8:
200 return &elf_howto_table[(int) R_390_8];
201 case BFD_RELOC_390_12:
202 return &elf_howto_table[(int) R_390_12];
203 case BFD_RELOC_16:
204 return &elf_howto_table[(int) R_390_16];
205 case BFD_RELOC_32:
206 return &elf_howto_table[(int) R_390_32];
207 case BFD_RELOC_CTOR:
208 return &elf_howto_table[(int) R_390_32];
209 case BFD_RELOC_32_PCREL:
210 return &elf_howto_table[(int) R_390_PC32];
211 case BFD_RELOC_390_GOT12:
212 return &elf_howto_table[(int) R_390_GOT12];
213 case BFD_RELOC_32_GOT_PCREL:
214 return &elf_howto_table[(int) R_390_GOT32];
215 case BFD_RELOC_390_PLT32:
216 return &elf_howto_table[(int) R_390_PLT32];
217 case BFD_RELOC_390_COPY:
218 return &elf_howto_table[(int) R_390_COPY];
219 case BFD_RELOC_390_GLOB_DAT:
220 return &elf_howto_table[(int) R_390_GLOB_DAT];
221 case BFD_RELOC_390_JMP_SLOT:
222 return &elf_howto_table[(int) R_390_JMP_SLOT];
223 case BFD_RELOC_390_RELATIVE:
224 return &elf_howto_table[(int) R_390_RELATIVE];
225 case BFD_RELOC_32_GOTOFF:
226 return &elf_howto_table[(int) R_390_GOTOFF32];
227 case BFD_RELOC_390_GOTPC:
228 return &elf_howto_table[(int) R_390_GOTPC];
229 case BFD_RELOC_390_GOT16:
230 return &elf_howto_table[(int) R_390_GOT16];
231 case BFD_RELOC_16_PCREL:
232 return &elf_howto_table[(int) R_390_PC16];
233 case BFD_RELOC_390_PC12DBL:
234 return &elf_howto_table[(int) R_390_PC12DBL];
235 case BFD_RELOC_390_PLT12DBL:
236 return &elf_howto_table[(int) R_390_PLT12DBL];
237 case BFD_RELOC_390_PC16DBL:
238 return &elf_howto_table[(int) R_390_PC16DBL];
239 case BFD_RELOC_390_PLT16DBL:
240 return &elf_howto_table[(int) R_390_PLT16DBL];
241 case BFD_RELOC_390_PC24DBL:
242 return &elf_howto_table[(int) R_390_PC24DBL];
243 case BFD_RELOC_390_PLT24DBL:
244 return &elf_howto_table[(int) R_390_PLT24DBL];
245 case BFD_RELOC_390_PC32DBL:
246 return &elf_howto_table[(int) R_390_PC32DBL];
247 case BFD_RELOC_390_PLT32DBL:
248 return &elf_howto_table[(int) R_390_PLT32DBL];
249 case BFD_RELOC_390_GOTPCDBL:
250 return &elf_howto_table[(int) R_390_GOTPCDBL];
251 case BFD_RELOC_64:
252 return &elf_howto_table[(int) R_390_64];
253 case BFD_RELOC_64_PCREL:
254 return &elf_howto_table[(int) R_390_PC64];
255 case BFD_RELOC_390_GOT64:
256 return &elf_howto_table[(int) R_390_GOT64];
257 case BFD_RELOC_390_PLT64:
258 return &elf_howto_table[(int) R_390_PLT64];
259 case BFD_RELOC_390_GOTENT:
260 return &elf_howto_table[(int) R_390_GOTENT];
261 case BFD_RELOC_16_GOTOFF:
262 return &elf_howto_table[(int) R_390_GOTOFF16];
263 case BFD_RELOC_390_GOTOFF64:
264 return &elf_howto_table[(int) R_390_GOTOFF64];
265 case BFD_RELOC_390_GOTPLT12:
266 return &elf_howto_table[(int) R_390_GOTPLT12];
267 case BFD_RELOC_390_GOTPLT16:
268 return &elf_howto_table[(int) R_390_GOTPLT16];
269 case BFD_RELOC_390_GOTPLT32:
270 return &elf_howto_table[(int) R_390_GOTPLT32];
271 case BFD_RELOC_390_GOTPLT64:
272 return &elf_howto_table[(int) R_390_GOTPLT64];
273 case BFD_RELOC_390_GOTPLTENT:
274 return &elf_howto_table[(int) R_390_GOTPLTENT];
275 case BFD_RELOC_390_PLTOFF16:
276 return &elf_howto_table[(int) R_390_PLTOFF16];
277 case BFD_RELOC_390_PLTOFF32:
278 return &elf_howto_table[(int) R_390_PLTOFF32];
279 case BFD_RELOC_390_PLTOFF64:
280 return &elf_howto_table[(int) R_390_PLTOFF64];
281 case BFD_RELOC_390_TLS_LOAD:
282 return &elf_howto_table[(int) R_390_TLS_LOAD];
283 case BFD_RELOC_390_TLS_GDCALL:
284 return &elf_howto_table[(int) R_390_TLS_GDCALL];
285 case BFD_RELOC_390_TLS_LDCALL:
286 return &elf_howto_table[(int) R_390_TLS_LDCALL];
287 case BFD_RELOC_390_TLS_GD64:
288 return &elf_howto_table[(int) R_390_TLS_GD64];
289 case BFD_RELOC_390_TLS_GOTIE12:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
291 case BFD_RELOC_390_TLS_GOTIE64:
292 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
293 case BFD_RELOC_390_TLS_LDM64:
294 return &elf_howto_table[(int) R_390_TLS_LDM64];
295 case BFD_RELOC_390_TLS_IE64:
296 return &elf_howto_table[(int) R_390_TLS_IE64];
297 case BFD_RELOC_390_TLS_IEENT:
298 return &elf_howto_table[(int) R_390_TLS_IEENT];
299 case BFD_RELOC_390_TLS_LE64:
300 return &elf_howto_table[(int) R_390_TLS_LE64];
301 case BFD_RELOC_390_TLS_LDO64:
302 return &elf_howto_table[(int) R_390_TLS_LDO64];
303 case BFD_RELOC_390_TLS_DTPMOD:
304 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
305 case BFD_RELOC_390_TLS_DTPOFF:
306 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
307 case BFD_RELOC_390_TLS_TPOFF:
308 return &elf_howto_table[(int) R_390_TLS_TPOFF];
309 case BFD_RELOC_390_20:
310 return &elf_howto_table[(int) R_390_20];
311 case BFD_RELOC_390_GOT20:
312 return &elf_howto_table[(int) R_390_GOT20];
313 case BFD_RELOC_390_GOTPLT20:
314 return &elf_howto_table[(int) R_390_GOTPLT20];
315 case BFD_RELOC_390_TLS_GOTIE20:
316 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
317 case BFD_RELOC_390_IRELATIVE:
318 return &elf_howto_table[(int) R_390_IRELATIVE];
319 case BFD_RELOC_VTABLE_INHERIT:
320 return &elf64_s390_vtinherit_howto;
321 case BFD_RELOC_VTABLE_ENTRY:
322 return &elf64_s390_vtentry_howto;
323 default:
324 break;
325 }
326 return 0;
327 }
328
329 static reloc_howto_type *
330 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
331 const char *r_name)
332 {
333 unsigned int i;
334
335 for (i = 0;
336 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
337 i++)
338 if (elf_howto_table[i].name != NULL
339 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
340 return &elf_howto_table[i];
341
342 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
343 return &elf64_s390_vtinherit_howto;
344 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
345 return &elf64_s390_vtentry_howto;
346
347 return NULL;
348 }
349
350 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
351 and elf64-s390.c has its own copy. */
352
353 static void
354 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
355 arelent *cache_ptr,
356 Elf_Internal_Rela *dst)
357 {
358 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
359 switch (r_type)
360 {
361 case R_390_GNU_VTINHERIT:
362 cache_ptr->howto = &elf64_s390_vtinherit_howto;
363 break;
364
365 case R_390_GNU_VTENTRY:
366 cache_ptr->howto = &elf64_s390_vtentry_howto;
367 break;
368
369 default:
370 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
371 {
372 /* xgettext:c-format */
373 _bfd_error_handler (_("%B: invalid relocation type %d"),
374 abfd, (int) r_type);
375 r_type = R_390_NONE;
376 }
377 cache_ptr->howto = &elf_howto_table[r_type];
378 }
379 }
380
381 /* A relocation function which doesn't do anything. */
382 static bfd_reloc_status_type
383 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
384 arelent *reloc_entry,
385 asymbol *symbol ATTRIBUTE_UNUSED,
386 void * data ATTRIBUTE_UNUSED,
387 asection *input_section,
388 bfd *output_bfd,
389 char **error_message ATTRIBUTE_UNUSED)
390 {
391 if (output_bfd)
392 reloc_entry->address += input_section->output_offset;
393 return bfd_reloc_ok;
394 }
395
396 /* Handle the large displacement relocs. */
397 static bfd_reloc_status_type
398 s390_elf_ldisp_reloc (bfd *abfd,
399 arelent *reloc_entry,
400 asymbol *symbol,
401 void * data,
402 asection *input_section,
403 bfd *output_bfd,
404 char **error_message ATTRIBUTE_UNUSED)
405 {
406 reloc_howto_type *howto = reloc_entry->howto;
407 bfd_vma relocation;
408 bfd_vma insn;
409
410 if (output_bfd != (bfd *) NULL
411 && (symbol->flags & BSF_SECTION_SYM) == 0
412 && (! howto->partial_inplace
413 || reloc_entry->addend == 0))
414 {
415 reloc_entry->address += input_section->output_offset;
416 return bfd_reloc_ok;
417 }
418 if (output_bfd != NULL)
419 return bfd_reloc_continue;
420
421 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
422 return bfd_reloc_outofrange;
423
424 relocation = (symbol->value
425 + symbol->section->output_section->vma
426 + symbol->section->output_offset);
427 relocation += reloc_entry->addend;
428 if (howto->pc_relative)
429 {
430 relocation -= (input_section->output_section->vma
431 + input_section->output_offset);
432 relocation -= reloc_entry->address;
433 }
434
435 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
436 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
437 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
438
439 if ((bfd_signed_vma) relocation < - 0x80000
440 || (bfd_signed_vma) relocation > 0x7ffff)
441 return bfd_reloc_overflow;
442 else
443 return bfd_reloc_ok;
444 }
445
446 static bfd_boolean
447 elf_s390_is_local_label_name (bfd *abfd, const char *name)
448 {
449 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
450 return TRUE;
451
452 return _bfd_elf_is_local_label_name (abfd, name);
453 }
454
455 /* Functions for the 390 ELF linker. */
456
457 /* The name of the dynamic interpreter. This is put in the .interp
458 section. */
459
460 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
461
462 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
463 copying dynamic variables from a shared lib into an app's dynbss
464 section, and instead use a dynamic relocation to point into the
465 shared lib. */
466 #define ELIMINATE_COPY_RELOCS 1
467
468 /* The size in bytes of the first entry in the procedure linkage table. */
469 #define PLT_FIRST_ENTRY_SIZE 32
470 /* The size in bytes of an entry in the procedure linkage table. */
471 #define PLT_ENTRY_SIZE 32
472
473 #define GOT_ENTRY_SIZE 8
474
475 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
476
477 /* The first three entries in a procedure linkage table are reserved,
478 and the initial contents are unimportant (we zero them out).
479 Subsequent entries look like this. See the SVR4 ABI 386
480 supplement to see how this works. */
481
482 /* For the s390, simple addr offset can only be 0 - 4096.
483 To use the full 16777216 TB address space, several instructions
484 are needed to load an address in a register and execute
485 a branch( or just saving the address)
486
487 Furthermore, only r 0 and 1 are free to use!!! */
488
489 /* The first 3 words in the GOT are then reserved.
490 Word 0 is the address of the dynamic table.
491 Word 1 is a pointer to a structure describing the object
492 Word 2 is used to point to the loader entry address.
493
494 The code for PLT entries looks like this:
495
496 The GOT holds the address in the PLT to be executed.
497 The loader then gets:
498 48(15) = Pointer to the structure describing the object.
499 56(15) = Offset in symbol table
500 The loader must then find the module where the function is
501 and insert the address in the GOT.
502
503 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
504 LG 1,0(1) # 6 bytes Load address from GOT in r1
505 BCR 15,1 # 2 bytes Jump to address
506 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
507 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
508 BRCL 15,-x # 6 bytes Jump to start of PLT
509 .long ? # 4 bytes offset into .rela.plt
510
511 Total = 32 bytes per PLT entry
512 Fixup at offset 2: relative address to GOT entry
513 Fixup at offset 22: relative branch to PLT0
514 Fixup at offset 28: 32 bit offset into .rela.plt
515
516 A 32 bit offset into the symbol table is enough. It allows for
517 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
518 object (the main program, any shared library) is limited to 4GB in
519 size. Having a .rela.plt of 2GB would already make the .plt
520 section bigger than 8GB. */
521
522 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
523 {
524 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
525 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
526 0x07, 0xf1, /* br %r1 */
527 0x0d, 0x10, /* basr %r1,%r0 */
528 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
529 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
530 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
531 };
532
533 /* The first PLT entry pushes the offset into the symbol table
534 from R1 onto the stack at 56(15) and the loader object info
535 at 48(15), loads the loader address in R1 and jumps to it. */
536
537 /* The first entry in the PLT:
538
539 PLT0:
540 STG 1,56(15) # r1 contains the offset into the symbol table
541 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
542 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
543 LG 1,16(1) # get entry address of loader
544 BCR 15,1 # jump to loader
545
546 Fixup at offset 8: relative address to start of GOT. */
547
548 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
549 {
550 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
551 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
552 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
553 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
554 0x07, 0xf1, /* br %r1 */
555 0x07, 0x00, /* nopr %r0 */
556 0x07, 0x00, /* nopr %r0 */
557 0x07, 0x00 /* nopr %r0 */
558 };
559
560
561 /* s390 ELF linker hash entry. */
562
563 struct elf_s390_link_hash_entry
564 {
565 struct elf_link_hash_entry elf;
566
567 /* Track dynamic relocs copied for this symbol. */
568 struct elf_dyn_relocs *dyn_relocs;
569
570 /* Number of GOTPLT references for a function. */
571 bfd_signed_vma gotplt_refcount;
572
573 #define GOT_UNKNOWN 0
574 #define GOT_NORMAL 1
575 #define GOT_TLS_GD 2
576 #define GOT_TLS_IE 3
577 #define GOT_TLS_IE_NLT 3
578 unsigned char tls_type;
579
580 /* For pointer equality reasons we might need to change the symbol
581 type from STT_GNU_IFUNC to STT_FUNC together with its value and
582 section entry. So after alloc_dynrelocs only these values should
583 be used. In order to check whether a symbol is IFUNC use
584 s390_is_ifunc_symbol_p. */
585 bfd_vma ifunc_resolver_address;
586 asection *ifunc_resolver_section;
587 };
588
589 #define elf_s390_hash_entry(ent) \
590 ((struct elf_s390_link_hash_entry *)(ent))
591
592 /* This structure represents an entry in the local PLT list needed for
593 local IFUNC symbols. */
594 struct plt_entry
595 {
596 /* The section of the local symbol.
597 Set in relocate_section and used in finish_dynamic_sections. */
598 asection *sec;
599
600 union
601 {
602 bfd_signed_vma refcount;
603 bfd_vma offset;
604 } plt;
605 };
606
607 /* NOTE: Keep this structure in sync with
608 the one declared in elf32-s390.c. */
609 struct elf_s390_obj_tdata
610 {
611 struct elf_obj_tdata root;
612
613 /* A local PLT is needed for ifunc symbols. */
614 struct plt_entry *local_plt;
615
616 /* TLS type for each local got entry. */
617 char *local_got_tls_type;
618 };
619
620 #define elf_s390_tdata(abfd) \
621 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
622
623 #define elf_s390_local_plt(abfd) \
624 (elf_s390_tdata (abfd)->local_plt)
625
626 #define elf_s390_local_got_tls_type(abfd) \
627 (elf_s390_tdata (abfd)->local_got_tls_type)
628
629 #define is_s390_elf(bfd) \
630 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
631 && elf_tdata (bfd) != NULL \
632 && elf_object_id (bfd) == S390_ELF_DATA)
633
634 static bfd_boolean
635 elf_s390_mkobject (bfd *abfd)
636 {
637 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
638 S390_ELF_DATA);
639 }
640
641 static bfd_boolean
642 elf_s390_object_p (bfd *abfd)
643 {
644 /* Set the right machine number for an s390 elf32 file. */
645 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
646 }
647
648 /* s390 ELF linker hash table. */
649
650 struct elf_s390_link_hash_table
651 {
652 struct elf_link_hash_table elf;
653
654 /* Short-cuts to get to dynamic linker sections. */
655 asection *irelifunc;
656
657 union {
658 bfd_signed_vma refcount;
659 bfd_vma offset;
660 } tls_ldm_got;
661
662 /* Small local sym cache. */
663 struct sym_cache sym_cache;
664
665 /* Options passed from the linker. */
666 struct s390_elf_params *params;
667 };
668
669 /* Get the s390 ELF linker hash table from a link_info structure. */
670
671 #define elf_s390_hash_table(p) \
672 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
673 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
674
675 #define ELF64 1
676 #include "elf-s390-common.c"
677
678 /* Create an entry in an s390 ELF linker hash table. */
679
680 static struct bfd_hash_entry *
681 link_hash_newfunc (struct bfd_hash_entry *entry,
682 struct bfd_hash_table *table,
683 const char *string)
684 {
685 /* Allocate the structure if it has not already been allocated by a
686 subclass. */
687 if (entry == NULL)
688 {
689 entry = bfd_hash_allocate (table,
690 sizeof (struct elf_s390_link_hash_entry));
691 if (entry == NULL)
692 return entry;
693 }
694
695 /* Call the allocation method of the superclass. */
696 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
697 if (entry != NULL)
698 {
699 struct elf_s390_link_hash_entry *eh;
700
701 eh = (struct elf_s390_link_hash_entry *) entry;
702 eh->dyn_relocs = NULL;
703 eh->gotplt_refcount = 0;
704 eh->tls_type = GOT_UNKNOWN;
705 eh->ifunc_resolver_address = 0;
706 eh->ifunc_resolver_section = NULL;
707 }
708
709 return entry;
710 }
711
712 /* Create an s390 ELF linker hash table. */
713
714 static struct bfd_link_hash_table *
715 elf_s390_link_hash_table_create (bfd *abfd)
716 {
717 struct elf_s390_link_hash_table *ret;
718 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
719
720 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
721 if (ret == NULL)
722 return NULL;
723
724 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
725 sizeof (struct elf_s390_link_hash_entry),
726 S390_ELF_DATA))
727 {
728 free (ret);
729 return NULL;
730 }
731
732 return &ret->elf.root;
733 }
734
735 /* Copy the extra info we tack onto an elf_link_hash_entry. */
736
737 static void
738 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
739 struct elf_link_hash_entry *dir,
740 struct elf_link_hash_entry *ind)
741 {
742 struct elf_s390_link_hash_entry *edir, *eind;
743
744 edir = (struct elf_s390_link_hash_entry *) dir;
745 eind = (struct elf_s390_link_hash_entry *) ind;
746
747 if (eind->dyn_relocs != NULL)
748 {
749 if (edir->dyn_relocs != NULL)
750 {
751 struct elf_dyn_relocs **pp;
752 struct elf_dyn_relocs *p;
753
754 /* Add reloc counts against the indirect sym to the direct sym
755 list. Merge any entries against the same section. */
756 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
757 {
758 struct elf_dyn_relocs *q;
759
760 for (q = edir->dyn_relocs; q != NULL; q = q->next)
761 if (q->sec == p->sec)
762 {
763 q->pc_count += p->pc_count;
764 q->count += p->count;
765 *pp = p->next;
766 break;
767 }
768 if (q == NULL)
769 pp = &p->next;
770 }
771 *pp = edir->dyn_relocs;
772 }
773
774 edir->dyn_relocs = eind->dyn_relocs;
775 eind->dyn_relocs = NULL;
776 }
777
778 if (ind->root.type == bfd_link_hash_indirect
779 && dir->got.refcount <= 0)
780 {
781 edir->tls_type = eind->tls_type;
782 eind->tls_type = GOT_UNKNOWN;
783 }
784
785 if (ELIMINATE_COPY_RELOCS
786 && ind->root.type != bfd_link_hash_indirect
787 && dir->dynamic_adjusted)
788 {
789 /* If called to transfer flags for a weakdef during processing
790 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
791 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
792 if (dir->versioned != versioned_hidden)
793 dir->ref_dynamic |= ind->ref_dynamic;
794 dir->ref_regular |= ind->ref_regular;
795 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
796 dir->needs_plt |= ind->needs_plt;
797 }
798 else
799 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
800 }
801
802 static int
803 elf_s390_tls_transition (struct bfd_link_info *info,
804 int r_type,
805 int is_local)
806 {
807 if (bfd_link_pic (info))
808 return r_type;
809
810 switch (r_type)
811 {
812 case R_390_TLS_GD64:
813 case R_390_TLS_IE64:
814 if (is_local)
815 return R_390_TLS_LE64;
816 return R_390_TLS_IE64;
817 case R_390_TLS_GOTIE64:
818 if (is_local)
819 return R_390_TLS_LE64;
820 return R_390_TLS_GOTIE64;
821 case R_390_TLS_LDM64:
822 return R_390_TLS_LE64;
823 }
824
825 return r_type;
826 }
827
828 /* Look through the relocs for a section during the first phase, and
829 allocate space in the global offset table or procedure linkage
830 table. */
831
832 static bfd_boolean
833 elf_s390_check_relocs (bfd *abfd,
834 struct bfd_link_info *info,
835 asection *sec,
836 const Elf_Internal_Rela *relocs)
837 {
838 struct elf_s390_link_hash_table *htab;
839 Elf_Internal_Shdr *symtab_hdr;
840 struct elf_link_hash_entry **sym_hashes;
841 const Elf_Internal_Rela *rel;
842 const Elf_Internal_Rela *rel_end;
843 asection *sreloc;
844 bfd_signed_vma *local_got_refcounts;
845 int tls_type, old_tls_type;
846
847 if (bfd_link_relocatable (info))
848 return TRUE;
849
850 BFD_ASSERT (is_s390_elf (abfd));
851
852 htab = elf_s390_hash_table (info);
853 if (htab == NULL)
854 return FALSE;
855
856 symtab_hdr = &elf_symtab_hdr (abfd);
857 sym_hashes = elf_sym_hashes (abfd);
858 local_got_refcounts = elf_local_got_refcounts (abfd);
859
860 sreloc = NULL;
861
862 rel_end = relocs + sec->reloc_count;
863 for (rel = relocs; rel < rel_end; rel++)
864 {
865 unsigned int r_type;
866 unsigned int r_symndx;
867 struct elf_link_hash_entry *h;
868 Elf_Internal_Sym *isym;
869
870 r_symndx = ELF64_R_SYM (rel->r_info);
871
872 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
873 {
874 /* xgettext:c-format */
875 _bfd_error_handler (_("%B: bad symbol index: %d"),
876 abfd, r_symndx);
877 return FALSE;
878 }
879
880 if (r_symndx < symtab_hdr->sh_info)
881 {
882 /* A local symbol. */
883 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
884 abfd, r_symndx);
885 if (isym == NULL)
886 return FALSE;
887
888 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
889 {
890 struct plt_entry *plt;
891
892 if (htab->elf.dynobj == NULL)
893 htab->elf.dynobj = abfd;
894
895 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
896 return FALSE;
897
898 if (local_got_refcounts == NULL)
899 {
900 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
901 return FALSE;
902 local_got_refcounts = elf_local_got_refcounts (abfd);
903 }
904 plt = elf_s390_local_plt (abfd);
905 plt[r_symndx].plt.refcount++;
906 }
907 h = NULL;
908 }
909 else
910 {
911 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
912 while (h->root.type == bfd_link_hash_indirect
913 || h->root.type == bfd_link_hash_warning)
914 h = (struct elf_link_hash_entry *) h->root.u.i.link;
915
916 /* PR15323, ref flags aren't set for references in the same
917 object. */
918 h->root.non_ir_ref_regular = 1;
919 }
920
921 /* Create got section and local_got_refcounts array if they
922 are needed. */
923 r_type = elf_s390_tls_transition (info,
924 ELF64_R_TYPE (rel->r_info),
925 h == NULL);
926 switch (r_type)
927 {
928 case R_390_GOT12:
929 case R_390_GOT16:
930 case R_390_GOT20:
931 case R_390_GOT32:
932 case R_390_GOT64:
933 case R_390_GOTENT:
934 case R_390_GOTPLT12:
935 case R_390_GOTPLT16:
936 case R_390_GOTPLT20:
937 case R_390_GOTPLT32:
938 case R_390_GOTPLT64:
939 case R_390_GOTPLTENT:
940 case R_390_TLS_GD64:
941 case R_390_TLS_GOTIE12:
942 case R_390_TLS_GOTIE20:
943 case R_390_TLS_GOTIE64:
944 case R_390_TLS_IEENT:
945 case R_390_TLS_IE64:
946 case R_390_TLS_LDM64:
947 if (h == NULL
948 && local_got_refcounts == NULL)
949 {
950 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
951 return FALSE;
952 local_got_refcounts = elf_local_got_refcounts (abfd);
953 }
954
955 /* Fall through. */
956 case R_390_GOTOFF16:
957 case R_390_GOTOFF32:
958 case R_390_GOTOFF64:
959 case R_390_GOTPC:
960 case R_390_GOTPCDBL:
961 if (htab->elf.sgot == NULL)
962 {
963 if (htab->elf.dynobj == NULL)
964 htab->elf.dynobj = abfd;
965 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
966 return FALSE;
967 }
968 }
969
970 if (h != NULL)
971 {
972 if (htab->elf.dynobj == NULL)
973 htab->elf.dynobj = abfd;
974 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
975 return FALSE;
976
977 /* Make sure an IFUNC symbol defined in a non-shared object
978 always gets a PLT slot. */
979 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
980 {
981 /* The symbol is called by the dynamic loader in order
982 to resolve the relocation. So it is in fact also
983 referenced. */
984 h->ref_regular = 1;
985 h->needs_plt = 1;
986 }
987 }
988
989 switch (r_type)
990 {
991 case R_390_GOTPC:
992 case R_390_GOTPCDBL:
993 /* These relocs do not need a GOT slot. They just load the
994 GOT pointer itself or address something else relative to
995 the GOT. Since the GOT pointer has been set up above we
996 are done. */
997 break;
998 case R_390_GOTOFF16:
999 case R_390_GOTOFF32:
1000 case R_390_GOTOFF64:
1001 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1002 break;
1003 /* Fall through. */
1004
1005 case R_390_PLT12DBL:
1006 case R_390_PLT16DBL:
1007 case R_390_PLT24DBL:
1008 case R_390_PLT32:
1009 case R_390_PLT32DBL:
1010 case R_390_PLT64:
1011 case R_390_PLTOFF16:
1012 case R_390_PLTOFF32:
1013 case R_390_PLTOFF64:
1014 /* This symbol requires a procedure linkage table entry. We
1015 actually build the entry in adjust_dynamic_symbol,
1016 because this might be a case of linking PIC code which is
1017 never referenced by a dynamic object, in which case we
1018 don't need to generate a procedure linkage table entry
1019 after all. */
1020
1021 /* If this is a local symbol, we resolve it directly without
1022 creating a procedure linkage table entry. */
1023 if (h != NULL)
1024 {
1025 h->needs_plt = 1;
1026 h->plt.refcount += 1;
1027 }
1028 break;
1029
1030 case R_390_GOTPLT12:
1031 case R_390_GOTPLT16:
1032 case R_390_GOTPLT20:
1033 case R_390_GOTPLT32:
1034 case R_390_GOTPLT64:
1035 case R_390_GOTPLTENT:
1036 /* This symbol requires either a procedure linkage table entry
1037 or an entry in the local got. We actually build the entry
1038 in adjust_dynamic_symbol because whether this is really a
1039 global reference can change and with it the fact if we have
1040 to create a plt entry or a local got entry. To be able to
1041 make a once global symbol a local one we have to keep track
1042 of the number of gotplt references that exist for this
1043 symbol. */
1044 if (h != NULL)
1045 {
1046 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1047 h->needs_plt = 1;
1048 h->plt.refcount += 1;
1049 }
1050 else
1051 local_got_refcounts[r_symndx] += 1;
1052 break;
1053
1054 case R_390_TLS_LDM64:
1055 htab->tls_ldm_got.refcount += 1;
1056 break;
1057
1058 case R_390_TLS_IE64:
1059 case R_390_TLS_GOTIE12:
1060 case R_390_TLS_GOTIE20:
1061 case R_390_TLS_GOTIE64:
1062 case R_390_TLS_IEENT:
1063 if (bfd_link_pic (info))
1064 info->flags |= DF_STATIC_TLS;
1065 /* Fall through */
1066
1067 case R_390_GOT12:
1068 case R_390_GOT16:
1069 case R_390_GOT20:
1070 case R_390_GOT32:
1071 case R_390_GOT64:
1072 case R_390_GOTENT:
1073 case R_390_TLS_GD64:
1074 /* This symbol requires a global offset table entry. */
1075 switch (r_type)
1076 {
1077 default:
1078 case R_390_GOT12:
1079 case R_390_GOT16:
1080 case R_390_GOT20:
1081 case R_390_GOT32:
1082 case R_390_GOTENT:
1083 tls_type = GOT_NORMAL;
1084 break;
1085 case R_390_TLS_GD64:
1086 tls_type = GOT_TLS_GD;
1087 break;
1088 case R_390_TLS_IE64:
1089 case R_390_TLS_GOTIE64:
1090 tls_type = GOT_TLS_IE;
1091 break;
1092 case R_390_TLS_GOTIE12:
1093 case R_390_TLS_GOTIE20:
1094 case R_390_TLS_IEENT:
1095 tls_type = GOT_TLS_IE_NLT;
1096 break;
1097 }
1098
1099 if (h != NULL)
1100 {
1101 h->got.refcount += 1;
1102 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1103 }
1104 else
1105 {
1106 local_got_refcounts[r_symndx] += 1;
1107 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1108 }
1109 /* If a TLS symbol is accessed using IE at least once,
1110 there is no point to use dynamic model for it. */
1111 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1112 {
1113 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1114 {
1115 _bfd_error_handler
1116 /* xgettext:c-format */
1117 (_("%B: `%s' accessed both as normal and thread local symbol"),
1118 abfd, h->root.root.string);
1119 return FALSE;
1120 }
1121 if (old_tls_type > tls_type)
1122 tls_type = old_tls_type;
1123 }
1124
1125 if (old_tls_type != tls_type)
1126 {
1127 if (h != NULL)
1128 elf_s390_hash_entry (h)->tls_type = tls_type;
1129 else
1130 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1131 }
1132
1133 if (r_type != R_390_TLS_IE64)
1134 break;
1135 /* Fall through */
1136
1137 case R_390_TLS_LE64:
1138 /* For static linking and executables this reloc will be
1139 calculated at linktime otherwise a TLS_TPOFF runtime
1140 reloc will be generated. */
1141 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1142 break;
1143
1144 if (!bfd_link_pic (info))
1145 break;
1146 info->flags |= DF_STATIC_TLS;
1147 /* Fall through */
1148
1149 case R_390_8:
1150 case R_390_16:
1151 case R_390_32:
1152 case R_390_64:
1153 case R_390_PC12DBL:
1154 case R_390_PC16:
1155 case R_390_PC16DBL:
1156 case R_390_PC24DBL:
1157 case R_390_PC32:
1158 case R_390_PC32DBL:
1159 case R_390_PC64:
1160 if (h != NULL && bfd_link_executable (info))
1161 {
1162 /* If this reloc is in a read-only section, we might
1163 need a copy reloc. We can't check reliably at this
1164 stage whether the section is read-only, as input
1165 sections have not yet been mapped to output sections.
1166 Tentatively set the flag for now, and correct in
1167 adjust_dynamic_symbol. */
1168 h->non_got_ref = 1;
1169
1170 if (!bfd_link_pic (info))
1171 {
1172 /* We may need a .plt entry if the function this reloc
1173 refers to is in a shared lib. */
1174 h->plt.refcount += 1;
1175 }
1176 }
1177
1178 /* If we are creating a shared library, and this is a reloc
1179 against a global symbol, or a non PC relative reloc
1180 against a local symbol, then we need to copy the reloc
1181 into the shared library. However, if we are linking with
1182 -Bsymbolic, we do not need to copy a reloc against a
1183 global symbol which is defined in an object we are
1184 including in the link (i.e., DEF_REGULAR is set). At
1185 this point we have not seen all the input files, so it is
1186 possible that DEF_REGULAR is not set now but will be set
1187 later (it is never cleared). In case of a weak definition,
1188 DEF_REGULAR may be cleared later by a strong definition in
1189 a shared library. We account for that possibility below by
1190 storing information in the relocs_copied field of the hash
1191 table entry. A similar situation occurs when creating
1192 shared libraries and symbol visibility changes render the
1193 symbol local.
1194
1195 If on the other hand, we are creating an executable, we
1196 may need to keep relocations for symbols satisfied by a
1197 dynamic library if we manage to avoid copy relocs for the
1198 symbol. */
1199 if ((bfd_link_pic (info)
1200 && (sec->flags & SEC_ALLOC) != 0
1201 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1202 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1203 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1204 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1207 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1208 || (h != NULL
1209 && (! SYMBOLIC_BIND (info, h)
1210 || h->root.type == bfd_link_hash_defweak
1211 || !h->def_regular))))
1212 || (ELIMINATE_COPY_RELOCS
1213 && !bfd_link_pic (info)
1214 && (sec->flags & SEC_ALLOC) != 0
1215 && h != NULL
1216 && (h->root.type == bfd_link_hash_defweak
1217 || !h->def_regular)))
1218 {
1219 struct elf_dyn_relocs *p;
1220 struct elf_dyn_relocs **head;
1221
1222 /* We must copy these reloc types into the output file.
1223 Create a reloc section in dynobj and make room for
1224 this reloc. */
1225 if (sreloc == NULL)
1226 {
1227 if (htab->elf.dynobj == NULL)
1228 htab->elf.dynobj = abfd;
1229
1230 sreloc = _bfd_elf_make_dynamic_reloc_section
1231 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1232
1233 if (sreloc == NULL)
1234 return FALSE;
1235 }
1236
1237 /* If this is a global symbol, we count the number of
1238 relocations we need for this symbol. */
1239 if (h != NULL)
1240 {
1241 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1242 }
1243 else
1244 {
1245 /* Track dynamic relocs needed for local syms too.
1246 We really need local syms available to do this
1247 easily. Oh well. */
1248 asection *s;
1249 void *vpp;
1250
1251 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1252 abfd, r_symndx);
1253 if (isym == NULL)
1254 return FALSE;
1255
1256 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1257 if (s == NULL)
1258 s = sec;
1259
1260 vpp = &elf_section_data (s)->local_dynrel;
1261 head = (struct elf_dyn_relocs **) vpp;
1262 }
1263
1264 p = *head;
1265 if (p == NULL || p->sec != sec)
1266 {
1267 bfd_size_type amt = sizeof *p;
1268 p = ((struct elf_dyn_relocs *)
1269 bfd_alloc (htab->elf.dynobj, amt));
1270 if (p == NULL)
1271 return FALSE;
1272 p->next = *head;
1273 *head = p;
1274 p->sec = sec;
1275 p->count = 0;
1276 p->pc_count = 0;
1277 }
1278
1279 p->count += 1;
1280 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1281 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1282 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1283 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1284 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1285 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1286 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1287 p->pc_count += 1;
1288 }
1289 break;
1290
1291 /* This relocation describes the C++ object vtable hierarchy.
1292 Reconstruct it for later use during GC. */
1293 case R_390_GNU_VTINHERIT:
1294 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1295 return FALSE;
1296 break;
1297
1298 /* This relocation describes which C++ vtable entries are actually
1299 used. Record for later use during GC. */
1300 case R_390_GNU_VTENTRY:
1301 BFD_ASSERT (h != NULL);
1302 if (h != NULL
1303 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1304 return FALSE;
1305 break;
1306
1307 default:
1308 break;
1309 }
1310 }
1311
1312 return TRUE;
1313 }
1314
1315 /* Return the section that should be marked against GC for a given
1316 relocation. */
1317
1318 static asection *
1319 elf_s390_gc_mark_hook (asection *sec,
1320 struct bfd_link_info *info,
1321 Elf_Internal_Rela *rel,
1322 struct elf_link_hash_entry *h,
1323 Elf_Internal_Sym *sym)
1324 {
1325 if (h != NULL)
1326 switch (ELF64_R_TYPE (rel->r_info))
1327 {
1328 case R_390_GNU_VTINHERIT:
1329 case R_390_GNU_VTENTRY:
1330 return NULL;
1331 }
1332
1333 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1334 }
1335
1336 /* Update the got entry reference counts for the section being removed. */
1337
1338 static bfd_boolean
1339 elf_s390_gc_sweep_hook (bfd *abfd,
1340 struct bfd_link_info *info,
1341 asection *sec,
1342 const Elf_Internal_Rela *relocs)
1343 {
1344 struct elf_s390_link_hash_table *htab;
1345 Elf_Internal_Shdr *symtab_hdr;
1346 struct elf_link_hash_entry **sym_hashes;
1347 bfd_signed_vma *local_got_refcounts;
1348 const Elf_Internal_Rela *rel, *relend;
1349
1350 if (bfd_link_relocatable (info))
1351 return TRUE;
1352
1353 htab = elf_s390_hash_table (info);
1354 if (htab == NULL)
1355 return FALSE;
1356
1357 elf_section_data (sec)->local_dynrel = NULL;
1358
1359 symtab_hdr = &elf_symtab_hdr (abfd);
1360 sym_hashes = elf_sym_hashes (abfd);
1361 local_got_refcounts = elf_local_got_refcounts (abfd);
1362
1363 relend = relocs + sec->reloc_count;
1364 for (rel = relocs; rel < relend; rel++)
1365 {
1366 unsigned long r_symndx;
1367 unsigned int r_type;
1368 struct elf_link_hash_entry *h = NULL;
1369
1370 r_symndx = ELF64_R_SYM (rel->r_info);
1371 if (r_symndx >= symtab_hdr->sh_info)
1372 {
1373 struct elf_s390_link_hash_entry *eh;
1374 struct elf_dyn_relocs **pp;
1375 struct elf_dyn_relocs *p;
1376
1377 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1378 while (h->root.type == bfd_link_hash_indirect
1379 || h->root.type == bfd_link_hash_warning)
1380 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1381 eh = (struct elf_s390_link_hash_entry *) h;
1382
1383 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1384 if (p->sec == sec)
1385 {
1386 /* Everything must go for SEC. */
1387 *pp = p->next;
1388 break;
1389 }
1390 }
1391 else
1392 {
1393 Elf_Internal_Sym *isym;
1394
1395 /* A local symbol. */
1396 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1397 abfd, r_symndx);
1398 if (isym == NULL)
1399 return FALSE;
1400
1401 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1402 {
1403 struct plt_entry *plt = elf_s390_local_plt (abfd);
1404 if (plt[r_symndx].plt.refcount > 0)
1405 plt[r_symndx].plt.refcount--;
1406 }
1407 }
1408
1409 r_type = ELF64_R_TYPE (rel->r_info);
1410 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1411 switch (r_type)
1412 {
1413 case R_390_TLS_LDM64:
1414 if (htab->tls_ldm_got.refcount > 0)
1415 htab->tls_ldm_got.refcount -= 1;
1416 break;
1417 case R_390_GOTOFF16:
1418 case R_390_GOTOFF32:
1419 case R_390_GOTOFF64:
1420 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1421 {
1422 h->plt.refcount--;
1423 break;
1424 }
1425
1426 case R_390_GOTPC:
1427 case R_390_GOTPCDBL:
1428 break;
1429
1430 case R_390_TLS_GD64:
1431 case R_390_TLS_IE64:
1432 case R_390_TLS_GOTIE12:
1433 case R_390_TLS_GOTIE20:
1434 case R_390_TLS_GOTIE64:
1435 case R_390_TLS_IEENT:
1436 case R_390_GOT12:
1437 case R_390_GOT16:
1438 case R_390_GOT20:
1439 case R_390_GOT32:
1440 case R_390_GOT64:
1441 case R_390_GOTENT:
1442 if (h != NULL)
1443 {
1444 if (h->got.refcount > 0)
1445 h->got.refcount -= 1;
1446 }
1447 else if (local_got_refcounts != NULL)
1448 {
1449 if (local_got_refcounts[r_symndx] > 0)
1450 local_got_refcounts[r_symndx] -= 1;
1451 }
1452 break;
1453
1454 case R_390_8:
1455 case R_390_12:
1456 case R_390_16:
1457 case R_390_20:
1458 case R_390_32:
1459 case R_390_64:
1460 case R_390_PC16:
1461 case R_390_PC12DBL:
1462 case R_390_PC16DBL:
1463 case R_390_PC24DBL:
1464 case R_390_PC32:
1465 case R_390_PC32DBL:
1466 case R_390_PC64:
1467 if (bfd_link_pic (info))
1468 break;
1469 /* Fall through */
1470
1471 case R_390_PLT12DBL:
1472 case R_390_PLT16DBL:
1473 case R_390_PLT24DBL:
1474 case R_390_PLT32:
1475 case R_390_PLT32DBL:
1476 case R_390_PLT64:
1477 case R_390_PLTOFF16:
1478 case R_390_PLTOFF32:
1479 case R_390_PLTOFF64:
1480 if (h != NULL)
1481 {
1482 if (h->plt.refcount > 0)
1483 h->plt.refcount -= 1;
1484 }
1485 break;
1486
1487 case R_390_GOTPLT12:
1488 case R_390_GOTPLT16:
1489 case R_390_GOTPLT20:
1490 case R_390_GOTPLT32:
1491 case R_390_GOTPLT64:
1492 case R_390_GOTPLTENT:
1493 if (h != NULL)
1494 {
1495 if (h->plt.refcount > 0)
1496 {
1497 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1498 h->plt.refcount -= 1;
1499 }
1500 }
1501 else if (local_got_refcounts != NULL)
1502 {
1503 if (local_got_refcounts[r_symndx] > 0)
1504 local_got_refcounts[r_symndx] -= 1;
1505 }
1506 break;
1507
1508 default:
1509 break;
1510 }
1511 }
1512
1513 return TRUE;
1514 }
1515
1516 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1517 entry but we found we will not create any. Called when we find we will
1518 not have any PLT for this symbol, by for example
1519 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1520 or elf_s390_size_dynamic_sections if no dynamic sections will be
1521 created (we're only linking static objects). */
1522
1523 static void
1524 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1525 {
1526 if (h->elf.root.type == bfd_link_hash_warning)
1527 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1528
1529 if (h->gotplt_refcount <= 0)
1530 return;
1531
1532 /* We simply add the number of gotplt references to the number
1533 * of got references for this symbol. */
1534 h->elf.got.refcount += h->gotplt_refcount;
1535 h->gotplt_refcount = -1;
1536 }
1537
1538 /* Adjust a symbol defined by a dynamic object and referenced by a
1539 regular object. The current definition is in some section of the
1540 dynamic object, but we're not including those sections. We have to
1541 change the definition to something the rest of the link can
1542 understand. */
1543
1544 static bfd_boolean
1545 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1546 struct elf_link_hash_entry *h)
1547 {
1548 struct elf_s390_link_hash_table *htab;
1549 asection *s, *srel;
1550
1551 /* STT_GNU_IFUNC symbol must go through PLT. */
1552 if (s390_is_ifunc_symbol_p (h))
1553 {
1554 /* All local STT_GNU_IFUNC references must be treated as local
1555 calls via local PLT. */
1556 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1557 {
1558 bfd_size_type pc_count = 0, count = 0;
1559 struct elf_dyn_relocs **pp;
1560 struct elf_s390_link_hash_entry *eh;
1561 struct elf_dyn_relocs *p;
1562
1563 eh = (struct elf_s390_link_hash_entry *) h;
1564 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1565 {
1566 pc_count += p->pc_count;
1567 p->count -= p->pc_count;
1568 p->pc_count = 0;
1569 count += p->count;
1570 if (p->count == 0)
1571 *pp = p->next;
1572 else
1573 pp = &p->next;
1574 }
1575
1576 if (pc_count || count)
1577 {
1578 h->needs_plt = 1;
1579 h->non_got_ref = 1;
1580 if (h->plt.refcount <= 0)
1581 h->plt.refcount = 1;
1582 else
1583 h->plt.refcount += 1;
1584 }
1585 }
1586
1587 if (h->plt.refcount <= 0)
1588 {
1589 h->plt.offset = (bfd_vma) -1;
1590 h->needs_plt = 0;
1591 }
1592 return TRUE;
1593 }
1594
1595 /* If this is a function, put it in the procedure linkage table. We
1596 will fill in the contents of the procedure linkage table later
1597 (although we could actually do it here). */
1598 if (h->type == STT_FUNC
1599 || h->needs_plt)
1600 {
1601 if (h->plt.refcount <= 0
1602 || SYMBOL_CALLS_LOCAL (info, h)
1603 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1604 && h->root.type == bfd_link_hash_undefweak))
1605 {
1606 /* This case can occur if we saw a PLT32 reloc in an input
1607 file, but the symbol was never referred to by a dynamic
1608 object, or if all references were garbage collected. In
1609 such a case, we don't actually need to build a procedure
1610 linkage table, and we can just do a PC32 reloc instead. */
1611 h->plt.offset = (bfd_vma) -1;
1612 h->needs_plt = 0;
1613 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1614 }
1615
1616 return TRUE;
1617 }
1618 else
1619 /* It's possible that we incorrectly decided a .plt reloc was
1620 needed for an R_390_PC32 reloc to a non-function sym in
1621 check_relocs. We can't decide accurately between function and
1622 non-function syms in check-relocs; Objects loaded later in
1623 the link may change h->type. So fix it now. */
1624 h->plt.offset = (bfd_vma) -1;
1625
1626 /* If this is a weak symbol, and there is a real definition, the
1627 processor independent code will have arranged for us to see the
1628 real definition first, and we can just use the same value. */
1629 if (h->u.weakdef != NULL)
1630 {
1631 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1632 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1633 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1634 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1635 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1636 h->non_got_ref = h->u.weakdef->non_got_ref;
1637 return TRUE;
1638 }
1639
1640 /* This is a reference to a symbol defined by a dynamic object which
1641 is not a function. */
1642
1643 /* If we are creating a shared library, we must presume that the
1644 only references to the symbol are via the global offset table.
1645 For such cases we need not do anything here; the relocations will
1646 be handled correctly by relocate_section. */
1647 if (bfd_link_pic (info))
1648 return TRUE;
1649
1650 /* If there are no references to this symbol that do not use the
1651 GOT, we don't need to generate a copy reloc. */
1652 if (!h->non_got_ref)
1653 return TRUE;
1654
1655 /* If -z nocopyreloc was given, we won't generate them either. */
1656 if (info->nocopyreloc)
1657 {
1658 h->non_got_ref = 0;
1659 return TRUE;
1660 }
1661
1662 if (ELIMINATE_COPY_RELOCS)
1663 {
1664 struct elf_s390_link_hash_entry * eh;
1665 struct elf_dyn_relocs *p;
1666
1667 eh = (struct elf_s390_link_hash_entry *) h;
1668 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1669 {
1670 s = p->sec->output_section;
1671 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1672 break;
1673 }
1674
1675 /* If we didn't find any dynamic relocs in read-only sections, then
1676 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1677 if (p == NULL)
1678 {
1679 h->non_got_ref = 0;
1680 return TRUE;
1681 }
1682 }
1683
1684 /* We must allocate the symbol in our .dynbss section, which will
1685 become part of the .bss section of the executable. There will be
1686 an entry for this symbol in the .dynsym section. The dynamic
1687 object will contain position independent code, so all references
1688 from the dynamic object to this symbol will go through the global
1689 offset table. The dynamic linker will use the .dynsym entry to
1690 determine the address it must put in the global offset table, so
1691 both the dynamic object and the regular object will refer to the
1692 same memory location for the variable. */
1693
1694 htab = elf_s390_hash_table (info);
1695 if (htab == NULL)
1696 return FALSE;
1697
1698 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1699 copy the initial value out of the dynamic object and into the
1700 runtime process image. */
1701 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1702 {
1703 s = htab->elf.sdynrelro;
1704 srel = htab->elf.sreldynrelro;
1705 }
1706 else
1707 {
1708 s = htab->elf.sdynbss;
1709 srel = htab->elf.srelbss;
1710 }
1711 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1712 {
1713 srel->size += sizeof (Elf64_External_Rela);
1714 h->needs_copy = 1;
1715 }
1716
1717 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1718 }
1719
1720 /* Allocate space in .plt, .got and associated reloc sections for
1721 dynamic relocs. */
1722
1723 static bfd_boolean
1724 allocate_dynrelocs (struct elf_link_hash_entry *h,
1725 void * inf)
1726 {
1727 struct bfd_link_info *info;
1728 struct elf_s390_link_hash_table *htab;
1729 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1730 struct elf_dyn_relocs *p;
1731
1732 if (h->root.type == bfd_link_hash_indirect)
1733 return TRUE;
1734
1735 info = (struct bfd_link_info *) inf;
1736 htab = elf_s390_hash_table (info);
1737 if (htab == NULL)
1738 return FALSE;
1739
1740 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1741 here if it is defined and referenced in a non-shared object. */
1742 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1743 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1744 else if (htab->elf.dynamic_sections_created
1745 && h->plt.refcount > 0)
1746 {
1747 /* Make sure this symbol is output as a dynamic symbol.
1748 Undefined weak syms won't yet be marked as dynamic. */
1749 if (h->dynindx == -1
1750 && !h->forced_local)
1751 {
1752 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1753 return FALSE;
1754 }
1755
1756 if (bfd_link_pic (info)
1757 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1758 {
1759 asection *s = htab->elf.splt;
1760
1761 /* If this is the first .plt entry, make room for the special
1762 first entry. */
1763 if (s->size == 0)
1764 s->size += PLT_FIRST_ENTRY_SIZE;
1765
1766 h->plt.offset = s->size;
1767
1768 /* If this symbol is not defined in a regular file, and we are
1769 not generating a shared library, then set the symbol to this
1770 location in the .plt. This is required to make function
1771 pointers compare as equal between the normal executable and
1772 the shared library. */
1773 if (! bfd_link_pic (info)
1774 && !h->def_regular)
1775 {
1776 h->root.u.def.section = s;
1777 h->root.u.def.value = h->plt.offset;
1778 }
1779
1780 /* Make room for this entry. */
1781 s->size += PLT_ENTRY_SIZE;
1782
1783 /* We also need to make an entry in the .got.plt section, which
1784 will be placed in the .got section by the linker script. */
1785 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1786
1787 /* We also need to make an entry in the .rela.plt section. */
1788 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1789 }
1790 else
1791 {
1792 h->plt.offset = (bfd_vma) -1;
1793 h->needs_plt = 0;
1794 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1795 }
1796 }
1797 else
1798 {
1799 h->plt.offset = (bfd_vma) -1;
1800 h->needs_plt = 0;
1801 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1802 }
1803
1804 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1805 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1806 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1807 we can save the dynamic TLS relocation. */
1808 if (h->got.refcount > 0
1809 && !bfd_link_pic (info)
1810 && h->dynindx == -1
1811 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1812 {
1813 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1814 /* For the GOTIE access without a literal pool entry the offset has
1815 to be stored somewhere. The immediate value in the instruction
1816 is not bit enough so the value is stored in the got. */
1817 {
1818 h->got.offset = htab->elf.sgot->size;
1819 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1820 }
1821 else
1822 h->got.offset = (bfd_vma) -1;
1823 }
1824 else if (h->got.refcount > 0)
1825 {
1826 asection *s;
1827 bfd_boolean dyn;
1828 int tls_type = elf_s390_hash_entry(h)->tls_type;
1829
1830 /* Make sure this symbol is output as a dynamic symbol.
1831 Undefined weak syms won't yet be marked as dynamic. */
1832 if (h->dynindx == -1
1833 && !h->forced_local)
1834 {
1835 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1836 return FALSE;
1837 }
1838
1839 s = htab->elf.sgot;
1840 h->got.offset = s->size;
1841 s->size += GOT_ENTRY_SIZE;
1842 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1843 if (tls_type == GOT_TLS_GD)
1844 s->size += GOT_ENTRY_SIZE;
1845 dyn = htab->elf.dynamic_sections_created;
1846 /* R_390_TLS_IE64 needs one dynamic relocation,
1847 R_390_TLS_GD64 needs one if local symbol and two if global. */
1848 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1849 || tls_type >= GOT_TLS_IE)
1850 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1851 else if (tls_type == GOT_TLS_GD)
1852 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1853 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1854 || h->root.type != bfd_link_hash_undefweak)
1855 && (bfd_link_pic (info)
1856 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1857 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1858 }
1859 else
1860 h->got.offset = (bfd_vma) -1;
1861
1862 if (eh->dyn_relocs == NULL)
1863 return TRUE;
1864
1865 /* In the shared -Bsymbolic case, discard space allocated for
1866 dynamic pc-relative relocs against symbols which turn out to be
1867 defined in regular objects. For the normal shared case, discard
1868 space for pc-relative relocs that have become local due to symbol
1869 visibility changes. */
1870
1871 if (bfd_link_pic (info))
1872 {
1873 if (SYMBOL_CALLS_LOCAL (info, h))
1874 {
1875 struct elf_dyn_relocs **pp;
1876
1877 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1878 {
1879 p->count -= p->pc_count;
1880 p->pc_count = 0;
1881 if (p->count == 0)
1882 *pp = p->next;
1883 else
1884 pp = &p->next;
1885 }
1886 }
1887
1888 /* Also discard relocs on undefined weak syms with non-default
1889 visibility. */
1890 if (eh->dyn_relocs != NULL
1891 && h->root.type == bfd_link_hash_undefweak)
1892 {
1893 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1894 eh->dyn_relocs = NULL;
1895
1896 /* Make sure undefined weak symbols are output as a dynamic
1897 symbol in PIEs. */
1898 else if (h->dynindx == -1
1899 && !h->forced_local)
1900 {
1901 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1902 return FALSE;
1903 }
1904 }
1905 }
1906 else if (ELIMINATE_COPY_RELOCS)
1907 {
1908 /* For the non-shared case, discard space for relocs against
1909 symbols which turn out to need copy relocs or are not
1910 dynamic. */
1911
1912 if (!h->non_got_ref
1913 && ((h->def_dynamic
1914 && !h->def_regular)
1915 || (htab->elf.dynamic_sections_created
1916 && (h->root.type == bfd_link_hash_undefweak
1917 || h->root.type == bfd_link_hash_undefined))))
1918 {
1919 /* Make sure this symbol is output as a dynamic symbol.
1920 Undefined weak syms won't yet be marked as dynamic. */
1921 if (h->dynindx == -1
1922 && !h->forced_local)
1923 {
1924 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1925 return FALSE;
1926 }
1927
1928 /* If that succeeded, we know we'll be keeping all the
1929 relocs. */
1930 if (h->dynindx != -1)
1931 goto keep;
1932 }
1933
1934 eh->dyn_relocs = NULL;
1935
1936 keep: ;
1937 }
1938
1939 /* Finally, allocate space. */
1940 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1941 {
1942 asection *sreloc = elf_section_data (p->sec)->sreloc;
1943 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1944 }
1945
1946 return TRUE;
1947 }
1948
1949 /* Find any dynamic relocs that apply to read-only sections. */
1950
1951 static bfd_boolean
1952 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1953 {
1954 struct elf_s390_link_hash_entry *eh;
1955 struct elf_dyn_relocs *p;
1956
1957 eh = (struct elf_s390_link_hash_entry *) h;
1958 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1959 {
1960 asection *s = p->sec->output_section;
1961
1962 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1963 {
1964 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1965
1966 info->flags |= DF_TEXTREL;
1967
1968 /* Not an error, just cut short the traversal. */
1969 return FALSE;
1970 }
1971 }
1972 return TRUE;
1973 }
1974
1975 /* Set the sizes of the dynamic sections. */
1976
1977 static bfd_boolean
1978 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1979 struct bfd_link_info *info)
1980 {
1981 struct elf_s390_link_hash_table *htab;
1982 bfd *dynobj;
1983 asection *s;
1984 bfd_boolean relocs;
1985 bfd *ibfd;
1986
1987 htab = elf_s390_hash_table (info);
1988 if (htab == NULL)
1989 return FALSE;
1990
1991 dynobj = htab->elf.dynobj;
1992 if (dynobj == NULL)
1993 abort ();
1994
1995 if (htab->elf.dynamic_sections_created)
1996 {
1997 /* Set the contents of the .interp section to the interpreter. */
1998 if (bfd_link_executable (info) && !info->nointerp)
1999 {
2000 s = bfd_get_linker_section (dynobj, ".interp");
2001 if (s == NULL)
2002 abort ();
2003 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2004 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2005 }
2006 }
2007
2008 /* Set up .got offsets for local syms, and space for local dynamic
2009 relocs. */
2010 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2011 {
2012 bfd_signed_vma *local_got;
2013 bfd_signed_vma *end_local_got;
2014 char *local_tls_type;
2015 bfd_size_type locsymcount;
2016 Elf_Internal_Shdr *symtab_hdr;
2017 asection *srela;
2018 struct plt_entry *local_plt;
2019 unsigned int i;
2020
2021 if (! is_s390_elf (ibfd))
2022 continue;
2023
2024 for (s = ibfd->sections; s != NULL; s = s->next)
2025 {
2026 struct elf_dyn_relocs *p;
2027
2028 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2029 {
2030 if (!bfd_is_abs_section (p->sec)
2031 && bfd_is_abs_section (p->sec->output_section))
2032 {
2033 /* Input section has been discarded, either because
2034 it is a copy of a linkonce section or due to
2035 linker script /DISCARD/, so we'll be discarding
2036 the relocs too. */
2037 }
2038 else if (p->count != 0)
2039 {
2040 srela = elf_section_data (p->sec)->sreloc;
2041 srela->size += p->count * sizeof (Elf64_External_Rela);
2042 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2043 info->flags |= DF_TEXTREL;
2044 }
2045 }
2046 }
2047
2048 local_got = elf_local_got_refcounts (ibfd);
2049 if (!local_got)
2050 continue;
2051
2052 symtab_hdr = &elf_symtab_hdr (ibfd);
2053 locsymcount = symtab_hdr->sh_info;
2054 end_local_got = local_got + locsymcount;
2055 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2056 s = htab->elf.sgot;
2057 srela = htab->elf.srelgot;
2058 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2059 {
2060 if (*local_got > 0)
2061 {
2062 *local_got = s->size;
2063 s->size += GOT_ENTRY_SIZE;
2064 if (*local_tls_type == GOT_TLS_GD)
2065 s->size += GOT_ENTRY_SIZE;
2066 if (bfd_link_pic (info))
2067 srela->size += sizeof (Elf64_External_Rela);
2068 }
2069 else
2070 *local_got = (bfd_vma) -1;
2071 }
2072
2073 local_plt = elf_s390_local_plt (ibfd);
2074 for (i = 0; i < symtab_hdr->sh_info; i++)
2075 {
2076 if (local_plt[i].plt.refcount > 0)
2077 {
2078 local_plt[i].plt.offset = htab->elf.iplt->size;
2079 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2080 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2081 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2082 }
2083 else
2084 local_plt[i].plt.offset = (bfd_vma) -1;
2085 }
2086 }
2087
2088 if (htab->tls_ldm_got.refcount > 0)
2089 {
2090 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2091 relocs. */
2092 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2093 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2094 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2095 }
2096 else
2097 htab->tls_ldm_got.offset = -1;
2098
2099 /* Allocate global sym .plt and .got entries, and space for global
2100 sym dynamic relocs. */
2101 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2102
2103 /* We now have determined the sizes of the various dynamic sections.
2104 Allocate memory for them. */
2105 relocs = FALSE;
2106 for (s = dynobj->sections; s != NULL; s = s->next)
2107 {
2108 if ((s->flags & SEC_LINKER_CREATED) == 0)
2109 continue;
2110
2111 if (s == htab->elf.splt
2112 || s == htab->elf.sgot
2113 || s == htab->elf.sgotplt
2114 || s == htab->elf.sdynbss
2115 || s == htab->elf.sdynrelro
2116 || s == htab->elf.iplt
2117 || s == htab->elf.igotplt
2118 || s == htab->irelifunc)
2119 {
2120 /* Strip this section if we don't need it; see the
2121 comment below. */
2122 }
2123 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2124 {
2125 if (s->size != 0 && s != htab->elf.srelplt)
2126 relocs = TRUE;
2127
2128 /* We use the reloc_count field as a counter if we need
2129 to copy relocs into the output file. */
2130 s->reloc_count = 0;
2131 }
2132 else
2133 {
2134 /* It's not one of our sections, so don't allocate space. */
2135 continue;
2136 }
2137
2138 if (s->size == 0)
2139 {
2140 /* If we don't need this section, strip it from the
2141 output file. This is to handle .rela.bss and
2142 .rela.plt. We must create it in
2143 create_dynamic_sections, because it must be created
2144 before the linker maps input sections to output
2145 sections. The linker does that before
2146 adjust_dynamic_symbol is called, and it is that
2147 function which decides whether anything needs to go
2148 into these sections. */
2149
2150 s->flags |= SEC_EXCLUDE;
2151 continue;
2152 }
2153
2154 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2155 continue;
2156
2157 /* Allocate memory for the section contents. We use bfd_zalloc
2158 here in case unused entries are not reclaimed before the
2159 section's contents are written out. This should not happen,
2160 but this way if it does, we get a R_390_NONE reloc instead
2161 of garbage. */
2162 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2163 if (s->contents == NULL)
2164 return FALSE;
2165 }
2166
2167 if (htab->elf.dynamic_sections_created)
2168 {
2169 /* Add some entries to the .dynamic section. We fill in the
2170 values later, in elf_s390_finish_dynamic_sections, but we
2171 must add the entries now so that we get the correct size for
2172 the .dynamic section. The DT_DEBUG entry is filled in by the
2173 dynamic linker and used by the debugger. */
2174 #define add_dynamic_entry(TAG, VAL) \
2175 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2176
2177 if (bfd_link_executable (info))
2178 {
2179 if (!add_dynamic_entry (DT_DEBUG, 0))
2180 return FALSE;
2181 }
2182
2183 if (htab->elf.splt->size != 0)
2184 {
2185 if (!add_dynamic_entry (DT_PLTGOT, 0)
2186 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2187 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2188 || !add_dynamic_entry (DT_JMPREL, 0))
2189 return FALSE;
2190 }
2191
2192 if (relocs)
2193 {
2194 if (!add_dynamic_entry (DT_RELA, 0)
2195 || !add_dynamic_entry (DT_RELASZ, 0)
2196 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2197 return FALSE;
2198
2199 /* If any dynamic relocs apply to a read-only section,
2200 then we need a DT_TEXTREL entry. */
2201 if ((info->flags & DF_TEXTREL) == 0)
2202 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2203 info);
2204
2205 if ((info->flags & DF_TEXTREL) != 0)
2206 {
2207 if (!add_dynamic_entry (DT_TEXTREL, 0))
2208 return FALSE;
2209 }
2210 }
2211 }
2212 #undef add_dynamic_entry
2213
2214 return TRUE;
2215 }
2216
2217 /* Return the base VMA address which should be subtracted from real addresses
2218 when resolving @dtpoff relocation.
2219 This is PT_TLS segment p_vaddr. */
2220
2221 static bfd_vma
2222 dtpoff_base (struct bfd_link_info *info)
2223 {
2224 /* If tls_sec is NULL, we should have signalled an error already. */
2225 if (elf_hash_table (info)->tls_sec == NULL)
2226 return 0;
2227 return elf_hash_table (info)->tls_sec->vma;
2228 }
2229
2230 /* Return the relocation value for @tpoff relocation
2231 if STT_TLS virtual address is ADDRESS. */
2232
2233 static bfd_vma
2234 tpoff (struct bfd_link_info *info, bfd_vma address)
2235 {
2236 struct elf_link_hash_table *htab = elf_hash_table (info);
2237
2238 /* If tls_sec is NULL, we should have signalled an error already. */
2239 if (htab->tls_sec == NULL)
2240 return 0;
2241 return htab->tls_size + htab->tls_sec->vma - address;
2242 }
2243
2244 /* Complain if TLS instruction relocation is against an invalid
2245 instruction. */
2246
2247 static void
2248 invalid_tls_insn (bfd *input_bfd,
2249 asection *input_section,
2250 Elf_Internal_Rela *rel)
2251 {
2252 reloc_howto_type *howto;
2253
2254 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2255 _bfd_error_handler
2256 /* xgettext:c-format */
2257 (_("%B(%A+%#Lx): invalid instruction for TLS relocation %s"),
2258 input_bfd,
2259 input_section,
2260 rel->r_offset,
2261 howto->name);
2262 bfd_set_error (bfd_error_bad_value);
2263 }
2264
2265 /* Relocate a 390 ELF section. */
2266
2267 static bfd_boolean
2268 elf_s390_relocate_section (bfd *output_bfd,
2269 struct bfd_link_info *info,
2270 bfd *input_bfd,
2271 asection *input_section,
2272 bfd_byte *contents,
2273 Elf_Internal_Rela *relocs,
2274 Elf_Internal_Sym *local_syms,
2275 asection **local_sections)
2276 {
2277 struct elf_s390_link_hash_table *htab;
2278 Elf_Internal_Shdr *symtab_hdr;
2279 struct elf_link_hash_entry **sym_hashes;
2280 bfd_vma *local_got_offsets;
2281 Elf_Internal_Rela *rel;
2282 Elf_Internal_Rela *relend;
2283
2284 BFD_ASSERT (is_s390_elf (input_bfd));
2285
2286 htab = elf_s390_hash_table (info);
2287 if (htab == NULL)
2288 return FALSE;
2289
2290 symtab_hdr = &elf_symtab_hdr (input_bfd);
2291 sym_hashes = elf_sym_hashes (input_bfd);
2292 local_got_offsets = elf_local_got_offsets (input_bfd);
2293
2294 rel = relocs;
2295 relend = relocs + input_section->reloc_count;
2296 for (; rel < relend; rel++)
2297 {
2298 unsigned int r_type;
2299 reloc_howto_type *howto;
2300 unsigned long r_symndx;
2301 struct elf_link_hash_entry *h;
2302 Elf_Internal_Sym *sym;
2303 asection *sec;
2304 bfd_vma off;
2305 bfd_vma relocation;
2306 bfd_boolean unresolved_reloc;
2307 bfd_reloc_status_type r;
2308 int tls_type;
2309 asection *base_got = htab->elf.sgot;
2310
2311 r_type = ELF64_R_TYPE (rel->r_info);
2312 if (r_type == (int) R_390_GNU_VTINHERIT
2313 || r_type == (int) R_390_GNU_VTENTRY)
2314 continue;
2315 if (r_type >= (int) R_390_max)
2316 {
2317 bfd_set_error (bfd_error_bad_value);
2318 return FALSE;
2319 }
2320
2321 howto = elf_howto_table + r_type;
2322 r_symndx = ELF64_R_SYM (rel->r_info);
2323
2324 h = NULL;
2325 sym = NULL;
2326 sec = NULL;
2327 unresolved_reloc = FALSE;
2328 if (r_symndx < symtab_hdr->sh_info)
2329 {
2330 sym = local_syms + r_symndx;
2331 sec = local_sections[r_symndx];
2332
2333 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2334 {
2335 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2336 if (local_plt == NULL)
2337 return FALSE;
2338
2339 /* Address of the PLT slot. */
2340 relocation = (htab->elf.iplt->output_section->vma
2341 + htab->elf.iplt->output_offset
2342 + local_plt[r_symndx].plt.offset);
2343
2344 switch (r_type)
2345 {
2346 case R_390_PLTOFF16:
2347 case R_390_PLTOFF32:
2348 case R_390_PLTOFF64:
2349 relocation -= htab->elf.sgot->output_section->vma;
2350 break;
2351 case R_390_GOTPLT12:
2352 case R_390_GOTPLT16:
2353 case R_390_GOTPLT20:
2354 case R_390_GOTPLT32:
2355 case R_390_GOTPLT64:
2356 case R_390_GOTPLTENT:
2357 case R_390_GOT12:
2358 case R_390_GOT16:
2359 case R_390_GOT20:
2360 case R_390_GOT32:
2361 case R_390_GOT64:
2362 case R_390_GOTENT:
2363 {
2364 /* Write the PLT slot address into the GOT slot. */
2365 bfd_put_64 (output_bfd, relocation,
2366 htab->elf.sgot->contents +
2367 local_got_offsets[r_symndx]);
2368 relocation = (local_got_offsets[r_symndx] +
2369 htab->elf.sgot->output_offset);
2370
2371 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2372 relocation += htab->elf.sgot->output_section->vma;
2373 break;
2374 }
2375 default:
2376 break;
2377 }
2378 /* The output section is needed later in
2379 finish_dynamic_section when creating the dynamic
2380 relocation. */
2381 local_plt[r_symndx].sec = sec;
2382 goto do_relocation;
2383 }
2384 else
2385 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2386 }
2387 else
2388 {
2389 bfd_boolean warned ATTRIBUTE_UNUSED;
2390 bfd_boolean ignored ATTRIBUTE_UNUSED;
2391
2392 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2393 r_symndx, symtab_hdr, sym_hashes,
2394 h, sec, relocation,
2395 unresolved_reloc, warned, ignored);
2396 }
2397
2398 if (sec != NULL && discarded_section (sec))
2399 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2400 rel, 1, relend, howto, 0, contents);
2401
2402 if (bfd_link_relocatable (info))
2403 continue;
2404
2405 switch (r_type)
2406 {
2407 case R_390_GOTPLT12:
2408 case R_390_GOTPLT16:
2409 case R_390_GOTPLT20:
2410 case R_390_GOTPLT32:
2411 case R_390_GOTPLT64:
2412 case R_390_GOTPLTENT:
2413 /* There are three cases for a GOTPLT relocation. 1) The
2414 relocation is against the jump slot entry of a plt that
2415 will get emitted to the output file. 2) The relocation
2416 is against the jump slot of a plt entry that has been
2417 removed. elf_s390_adjust_gotplt has created a GOT entry
2418 as replacement. 3) The relocation is against a local symbol.
2419 Cases 2) and 3) are the same as the GOT relocation code
2420 so we just have to test for case 1 and fall through for
2421 the other two. */
2422 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2423 {
2424 bfd_vma plt_index;
2425
2426 if (s390_is_ifunc_symbol_p (h))
2427 {
2428 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2429 relocation = (plt_index * GOT_ENTRY_SIZE +
2430 htab->elf.igotplt->output_offset);
2431 if (r_type == R_390_GOTPLTENT)
2432 relocation += htab->elf.igotplt->output_section->vma;
2433 }
2434 else
2435 {
2436 /* Calc. index no.
2437 Current offset - size first entry / entry size. */
2438 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2439 PLT_ENTRY_SIZE;
2440
2441 /* Offset in GOT is PLT index plus GOT headers(3)
2442 times 8, addr & GOT addr. */
2443 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2444 if (r_type == R_390_GOTPLTENT)
2445 relocation += htab->elf.sgot->output_section->vma;
2446 }
2447 unresolved_reloc = FALSE;
2448 break;
2449 }
2450 /* Fall through. */
2451
2452 case R_390_GOT12:
2453 case R_390_GOT16:
2454 case R_390_GOT20:
2455 case R_390_GOT32:
2456 case R_390_GOT64:
2457 case R_390_GOTENT:
2458 /* Relocation is to the entry for this symbol in the global
2459 offset table. */
2460 if (base_got == NULL)
2461 abort ();
2462
2463 if (h != NULL)
2464 {
2465 bfd_boolean dyn;
2466
2467 off = h->got.offset;
2468 dyn = htab->elf.dynamic_sections_created;
2469
2470 if (s390_is_ifunc_symbol_p (h))
2471 {
2472 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2473 if (off == (bfd_vma)-1)
2474 {
2475 /* No explicit GOT usage so redirect to the
2476 got.iplt slot. */
2477 base_got = htab->elf.igotplt;
2478 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2479 }
2480 else
2481 {
2482 /* Explicit GOT slots must contain the address
2483 of the PLT slot. This will be handled in
2484 finish_dynamic_symbol. */
2485 }
2486 }
2487 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2488 bfd_link_pic (info),
2489 h)
2490 || (bfd_link_pic (info)
2491 && SYMBOL_REFERENCES_LOCAL (info, h))
2492 || (ELF_ST_VISIBILITY (h->other)
2493 && h->root.type == bfd_link_hash_undefweak))
2494 {
2495 /* This is actually a static link, or it is a
2496 -Bsymbolic link and the symbol is defined
2497 locally, or the symbol was forced to be local
2498 because of a version file. We must initialize
2499 this entry in the global offset table. Since the
2500 offset must always be a multiple of 2, we use the
2501 least significant bit to record whether we have
2502 initialized it already.
2503
2504 When doing a dynamic link, we create a .rel.got
2505 relocation entry to initialize the value. This
2506 is done in the finish_dynamic_symbol routine. */
2507 if ((off & 1) != 0)
2508 off &= ~1;
2509 else
2510 {
2511 bfd_put_64 (output_bfd, relocation,
2512 base_got->contents + off);
2513 h->got.offset |= 1;
2514 }
2515
2516 if ((h->def_regular
2517 && bfd_link_pic (info)
2518 && SYMBOL_REFERENCES_LOCAL (info, h))
2519 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2520 && ((r_type == R_390_GOTENT
2521 && (bfd_get_16 (input_bfd,
2522 contents + rel->r_offset - 2)
2523 & 0xff0f) == 0xc408)
2524 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2525 || (r_type == R_390_GOT20
2526 && (bfd_get_32 (input_bfd,
2527 contents + rel->r_offset - 2)
2528 & 0xff00f000) == 0xe300c000
2529 && bfd_get_8 (input_bfd,
2530 contents + rel->r_offset + 3) == 0x04)))
2531
2532 {
2533 unsigned short new_insn =
2534 (0xc000 | (bfd_get_8 (input_bfd,
2535 contents + rel->r_offset - 1) & 0xf0));
2536 bfd_put_16 (output_bfd, new_insn,
2537 contents + rel->r_offset - 2);
2538 r_type = R_390_PC32DBL;
2539 rel->r_addend = 2;
2540 howto = elf_howto_table + r_type;
2541 relocation = h->root.u.def.value
2542 + h->root.u.def.section->output_section->vma
2543 + h->root.u.def.section->output_offset;
2544 goto do_relocation;
2545 }
2546 }
2547 else
2548 unresolved_reloc = FALSE;
2549 }
2550 else
2551 {
2552 if (local_got_offsets == NULL)
2553 abort ();
2554
2555 off = local_got_offsets[r_symndx];
2556
2557 /* The offset must always be a multiple of 8. We use
2558 the least significant bit to record whether we have
2559 already generated the necessary reloc. */
2560 if ((off & 1) != 0)
2561 off &= ~1;
2562 else
2563 {
2564 bfd_put_64 (output_bfd, relocation,
2565 htab->elf.sgot->contents + off);
2566
2567 if (bfd_link_pic (info))
2568 {
2569 asection *s;
2570 Elf_Internal_Rela outrel;
2571 bfd_byte *loc;
2572
2573 s = htab->elf.srelgot;
2574 if (s == NULL)
2575 abort ();
2576
2577 outrel.r_offset = (htab->elf.sgot->output_section->vma
2578 + htab->elf.sgot->output_offset
2579 + off);
2580 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2581 outrel.r_addend = relocation;
2582 loc = s->contents;
2583 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2584 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2585 }
2586
2587 local_got_offsets[r_symndx] |= 1;
2588 }
2589 }
2590
2591 if (off >= (bfd_vma) -2)
2592 abort ();
2593
2594 relocation = base_got->output_offset + off;
2595
2596 /* For @GOTENT the relocation is against the offset between
2597 the instruction and the symbols entry in the GOT and not
2598 between the start of the GOT and the symbols entry. We
2599 add the vma of the GOT to get the correct value. */
2600 if ( r_type == R_390_GOTENT
2601 || r_type == R_390_GOTPLTENT)
2602 relocation += base_got->output_section->vma;
2603
2604 break;
2605
2606 case R_390_GOTOFF16:
2607 case R_390_GOTOFF32:
2608 case R_390_GOTOFF64:
2609 /* Relocation is relative to the start of the global offset
2610 table. */
2611
2612 if (h != NULL
2613 && s390_is_ifunc_symbol_p (h)
2614 && h->def_regular
2615 && !bfd_link_executable (info))
2616 {
2617 relocation = (htab->elf.iplt->output_section->vma
2618 + htab->elf.iplt->output_offset
2619 + h->plt.offset
2620 - htab->elf.sgot->output_section->vma);
2621 goto do_relocation;
2622 }
2623
2624 /* Note that sgot->output_offset is not involved in this
2625 calculation. We always want the start of .got. If we
2626 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2627 permitted by the ABI, we might have to change this
2628 calculation. */
2629 relocation -= htab->elf.sgot->output_section->vma;
2630 break;
2631
2632 case R_390_GOTPC:
2633 case R_390_GOTPCDBL:
2634 /* Use global offset table as symbol value. */
2635 relocation = htab->elf.sgot->output_section->vma;
2636 unresolved_reloc = FALSE;
2637 break;
2638
2639 case R_390_PLT12DBL:
2640 case R_390_PLT16DBL:
2641 case R_390_PLT24DBL:
2642 case R_390_PLT32:
2643 case R_390_PLT32DBL:
2644 case R_390_PLT64:
2645 /* Relocation is to the entry for this symbol in the
2646 procedure linkage table. */
2647
2648 /* Resolve a PLT32 reloc against a local symbol directly,
2649 without using the procedure linkage table. */
2650 if (h == NULL)
2651 break;
2652
2653 if (h->plt.offset == (bfd_vma) -1
2654 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2655 {
2656 /* We didn't make a PLT entry for this symbol. This
2657 happens when statically linking PIC code, or when
2658 using -Bsymbolic. */
2659 break;
2660 }
2661 if (s390_is_ifunc_symbol_p (h))
2662 relocation = (htab->elf.iplt->output_section->vma
2663 + htab->elf.iplt->output_offset
2664 + h->plt.offset);
2665 else
2666 relocation = (htab->elf.splt->output_section->vma
2667 + htab->elf.splt->output_offset
2668 + h->plt.offset);
2669 unresolved_reloc = FALSE;
2670 break;
2671
2672 case R_390_PLTOFF16:
2673 case R_390_PLTOFF32:
2674 case R_390_PLTOFF64:
2675 /* Relocation is to the entry for this symbol in the
2676 procedure linkage table relative to the start of the GOT. */
2677
2678 /* For local symbols or if we didn't make a PLT entry for
2679 this symbol resolve the symbol directly. */
2680 if (h == NULL
2681 || h->plt.offset == (bfd_vma) -1
2682 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2683 {
2684 relocation -= htab->elf.sgot->output_section->vma;
2685 break;
2686 }
2687
2688 if (s390_is_ifunc_symbol_p (h))
2689 relocation = (htab->elf.iplt->output_section->vma
2690 + htab->elf.iplt->output_offset
2691 + h->plt.offset
2692 - htab->elf.sgot->output_section->vma);
2693 else
2694 relocation = (htab->elf.splt->output_section->vma
2695 + htab->elf.splt->output_offset
2696 + h->plt.offset
2697 - htab->elf.sgot->output_section->vma);
2698 unresolved_reloc = FALSE;
2699 break;
2700
2701 case R_390_PC16:
2702 case R_390_PC12DBL:
2703 case R_390_PC16DBL:
2704 case R_390_PC24DBL:
2705 case R_390_PC32:
2706 case R_390_PC32DBL:
2707 case R_390_PC64:
2708 if (h != NULL
2709 && bfd_link_pie (info)
2710 && !h->def_regular)
2711 {
2712 _bfd_error_handler (_("%B: `%s' non-PLT reloc for symbol defined "
2713 "in shared library and accessed "
2714 "from executable "
2715 "(rebuild file with -fPIC ?)"),
2716 input_bfd, h->root.root.string);
2717 bfd_set_error (bfd_error_bad_value);
2718 return FALSE;
2719 }
2720 /* The target of these relocs are instruction operands
2721 residing in read-only sections. We cannot emit a runtime
2722 reloc for it. */
2723 if (h != NULL
2724 && s390_is_ifunc_symbol_p (h)
2725 && h->def_regular
2726 && bfd_link_pic (info))
2727 {
2728 relocation = (htab->elf.iplt->output_section->vma
2729 + htab->elf.iplt->output_offset
2730 + h->plt.offset);
2731 goto do_relocation;
2732 }
2733 /* Fall through. */
2734
2735 case R_390_8:
2736 case R_390_16:
2737 case R_390_32:
2738 case R_390_64:
2739
2740 if (h != NULL
2741 && s390_is_ifunc_symbol_p (h)
2742 && h->def_regular)
2743 {
2744 if (!bfd_link_pic (info))
2745 {
2746 /* For a non-shared object the symbol will not
2747 change. Hence we can write the address of the
2748 target IPLT slot now. */
2749 relocation = (htab->elf.iplt->output_section->vma
2750 + htab->elf.iplt->output_offset
2751 + h ->plt.offset);
2752 goto do_relocation;
2753 }
2754 else
2755 {
2756 /* For shared objects a runtime relocation is needed. */
2757
2758 Elf_Internal_Rela outrel;
2759 asection *sreloc;
2760
2761 /* Need a dynamic relocation to get the real function
2762 address. */
2763 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2764 info,
2765 input_section,
2766 rel->r_offset);
2767 if (outrel.r_offset == (bfd_vma) -1
2768 || outrel.r_offset == (bfd_vma) -2)
2769 abort ();
2770
2771 outrel.r_offset += (input_section->output_section->vma
2772 + input_section->output_offset);
2773
2774 if (h->dynindx == -1
2775 || h->forced_local
2776 || bfd_link_executable (info))
2777 {
2778 /* This symbol is resolved locally. */
2779 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2780 outrel.r_addend = (h->root.u.def.value
2781 + h->root.u.def.section->output_section->vma
2782 + h->root.u.def.section->output_offset);
2783 }
2784 else
2785 {
2786 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2787 outrel.r_addend = 0;
2788 }
2789
2790 sreloc = htab->elf.irelifunc;
2791 elf_append_rela (output_bfd, sreloc, &outrel);
2792
2793 /* If this reloc is against an external symbol, we
2794 do not want to fiddle with the addend. Otherwise,
2795 we need to include the symbol value so that it
2796 becomes an addend for the dynamic reloc. For an
2797 internal symbol, we have updated addend. */
2798 continue;
2799 }
2800 }
2801
2802 if ((input_section->flags & SEC_ALLOC) == 0)
2803 break;
2804
2805 if ((bfd_link_pic (info)
2806 && (h == NULL
2807 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2808 || h->root.type != bfd_link_hash_undefweak)
2809 && ((r_type != R_390_PC16
2810 && r_type != R_390_PC12DBL
2811 && r_type != R_390_PC16DBL
2812 && r_type != R_390_PC24DBL
2813 && r_type != R_390_PC32
2814 && r_type != R_390_PC32DBL
2815 && r_type != R_390_PC64)
2816 || !SYMBOL_CALLS_LOCAL (info, h)))
2817 || (ELIMINATE_COPY_RELOCS
2818 && !bfd_link_pic (info)
2819 && h != NULL
2820 && h->dynindx != -1
2821 && !h->non_got_ref
2822 && ((h->def_dynamic
2823 && !h->def_regular)
2824 || h->root.type == bfd_link_hash_undefweak
2825 || h->root.type == bfd_link_hash_undefined)))
2826 {
2827 Elf_Internal_Rela outrel;
2828 bfd_boolean skip, relocate;
2829 asection *sreloc;
2830 bfd_byte *loc;
2831
2832 /* When generating a shared object, these relocations
2833 are copied into the output file to be resolved at run
2834 time. */
2835 skip = FALSE;
2836 relocate = FALSE;
2837
2838 outrel.r_offset =
2839 _bfd_elf_section_offset (output_bfd, info, input_section,
2840 rel->r_offset);
2841 if (outrel.r_offset == (bfd_vma) -1)
2842 skip = TRUE;
2843 else if (outrel.r_offset == (bfd_vma) -2)
2844 skip = TRUE, relocate = TRUE;
2845
2846 outrel.r_offset += (input_section->output_section->vma
2847 + input_section->output_offset);
2848
2849 if (skip)
2850 memset (&outrel, 0, sizeof outrel);
2851 else if (h != NULL
2852 && h->dynindx != -1
2853 && (r_type == R_390_PC16
2854 || r_type == R_390_PC12DBL
2855 || r_type == R_390_PC16DBL
2856 || r_type == R_390_PC24DBL
2857 || r_type == R_390_PC32
2858 || r_type == R_390_PC32DBL
2859 || r_type == R_390_PC64
2860 || !bfd_link_pic (info)
2861 || !SYMBOLIC_BIND (info, h)
2862 || !h->def_regular))
2863 {
2864 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2865 outrel.r_addend = rel->r_addend;
2866 }
2867 else
2868 {
2869 /* This symbol is local, or marked to become local. */
2870 outrel.r_addend = relocation + rel->r_addend;
2871 if (r_type == R_390_64)
2872 {
2873 relocate = TRUE;
2874 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2875 }
2876 else
2877 {
2878 long sindx;
2879
2880 if (bfd_is_abs_section (sec))
2881 sindx = 0;
2882 else if (sec == NULL || sec->owner == NULL)
2883 {
2884 bfd_set_error(bfd_error_bad_value);
2885 return FALSE;
2886 }
2887 else
2888 {
2889 asection *osec;
2890
2891 osec = sec->output_section;
2892 sindx = elf_section_data (osec)->dynindx;
2893
2894 if (sindx == 0)
2895 {
2896 osec = htab->elf.text_index_section;
2897 sindx = elf_section_data (osec)->dynindx;
2898 }
2899 BFD_ASSERT (sindx != 0);
2900
2901 /* We are turning this relocation into one
2902 against a section symbol, so subtract out
2903 the output section's address but not the
2904 offset of the input section in the output
2905 section. */
2906 outrel.r_addend -= osec->vma;
2907 }
2908 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2909 }
2910 }
2911
2912 sreloc = elf_section_data (input_section)->sreloc;
2913 if (sreloc == NULL)
2914 abort ();
2915
2916 loc = sreloc->contents;
2917 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2918 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2919
2920 /* If this reloc is against an external symbol, we do
2921 not want to fiddle with the addend. Otherwise, we
2922 need to include the symbol value so that it becomes
2923 an addend for the dynamic reloc. */
2924 if (! relocate)
2925 continue;
2926 }
2927
2928 break;
2929
2930 /* Relocations for tls literal pool entries. */
2931 case R_390_TLS_IE64:
2932 if (bfd_link_pic (info))
2933 {
2934 Elf_Internal_Rela outrel;
2935 asection *sreloc;
2936 bfd_byte *loc;
2937
2938 outrel.r_offset = rel->r_offset
2939 + input_section->output_section->vma
2940 + input_section->output_offset;
2941 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2942 sreloc = elf_section_data (input_section)->sreloc;
2943 if (sreloc == NULL)
2944 abort ();
2945 loc = sreloc->contents;
2946 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2947 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2948 }
2949 /* Fall through. */
2950
2951 case R_390_TLS_GD64:
2952 case R_390_TLS_GOTIE64:
2953 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2954 tls_type = GOT_UNKNOWN;
2955 if (h == NULL && local_got_offsets)
2956 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2957 else if (h != NULL)
2958 {
2959 tls_type = elf_s390_hash_entry(h)->tls_type;
2960 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2961 r_type = R_390_TLS_LE64;
2962 }
2963 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2964 r_type = R_390_TLS_IE64;
2965
2966 if (r_type == R_390_TLS_LE64)
2967 {
2968 /* This relocation gets optimized away by the local exec
2969 access optimization. */
2970 BFD_ASSERT (! unresolved_reloc);
2971 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2972 contents + rel->r_offset);
2973 continue;
2974 }
2975
2976 if (htab->elf.sgot == NULL)
2977 abort ();
2978
2979 if (h != NULL)
2980 off = h->got.offset;
2981 else
2982 {
2983 if (local_got_offsets == NULL)
2984 abort ();
2985
2986 off = local_got_offsets[r_symndx];
2987 }
2988
2989 emit_tls_relocs:
2990
2991 if ((off & 1) != 0)
2992 off &= ~1;
2993 else
2994 {
2995 Elf_Internal_Rela outrel;
2996 bfd_byte *loc;
2997 int dr_type, indx;
2998
2999 if (htab->elf.srelgot == NULL)
3000 abort ();
3001
3002 outrel.r_offset = (htab->elf.sgot->output_section->vma
3003 + htab->elf.sgot->output_offset + off);
3004
3005 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3006 if (r_type == R_390_TLS_GD64)
3007 dr_type = R_390_TLS_DTPMOD;
3008 else
3009 dr_type = R_390_TLS_TPOFF;
3010 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3011 outrel.r_addend = relocation - dtpoff_base (info);
3012 else
3013 outrel.r_addend = 0;
3014 outrel.r_info = ELF64_R_INFO (indx, dr_type);
3015 loc = htab->elf.srelgot->contents;
3016 loc += htab->elf.srelgot->reloc_count++
3017 * sizeof (Elf64_External_Rela);
3018 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3019
3020 if (r_type == R_390_TLS_GD64)
3021 {
3022 if (indx == 0)
3023 {
3024 BFD_ASSERT (! unresolved_reloc);
3025 bfd_put_64 (output_bfd,
3026 relocation - dtpoff_base (info),
3027 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3028 }
3029 else
3030 {
3031 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
3032 outrel.r_offset += GOT_ENTRY_SIZE;
3033 outrel.r_addend = 0;
3034 htab->elf.srelgot->reloc_count++;
3035 loc += sizeof (Elf64_External_Rela);
3036 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3037 }
3038 }
3039
3040 if (h != NULL)
3041 h->got.offset |= 1;
3042 else
3043 local_got_offsets[r_symndx] |= 1;
3044 }
3045
3046 if (off >= (bfd_vma) -2)
3047 abort ();
3048 if (r_type == ELF64_R_TYPE (rel->r_info))
3049 {
3050 relocation = htab->elf.sgot->output_offset + off;
3051 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3052 relocation += htab->elf.sgot->output_section->vma;
3053 unresolved_reloc = FALSE;
3054 }
3055 else
3056 {
3057 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3058 contents + rel->r_offset);
3059 continue;
3060 }
3061 break;
3062
3063 case R_390_TLS_GOTIE12:
3064 case R_390_TLS_GOTIE20:
3065 case R_390_TLS_IEENT:
3066 if (h == NULL)
3067 {
3068 if (local_got_offsets == NULL)
3069 abort();
3070 off = local_got_offsets[r_symndx];
3071 if (bfd_link_pic (info))
3072 goto emit_tls_relocs;
3073 }
3074 else
3075 {
3076 off = h->got.offset;
3077 tls_type = elf_s390_hash_entry(h)->tls_type;
3078 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3079 goto emit_tls_relocs;
3080 }
3081
3082 if (htab->elf.sgot == NULL)
3083 abort ();
3084
3085 BFD_ASSERT (! unresolved_reloc);
3086 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3087 htab->elf.sgot->contents + off);
3088 relocation = htab->elf.sgot->output_offset + off;
3089 if (r_type == R_390_TLS_IEENT)
3090 relocation += htab->elf.sgot->output_section->vma;
3091 unresolved_reloc = FALSE;
3092 break;
3093
3094 case R_390_TLS_LDM64:
3095 if (! bfd_link_pic (info))
3096 /* The literal pool entry this relocation refers to gets ignored
3097 by the optimized code of the local exec model. Do nothing
3098 and the value will turn out zero. */
3099 continue;
3100
3101 if (htab->elf.sgot == NULL)
3102 abort ();
3103
3104 off = htab->tls_ldm_got.offset;
3105 if (off & 1)
3106 off &= ~1;
3107 else
3108 {
3109 Elf_Internal_Rela outrel;
3110 bfd_byte *loc;
3111
3112 if (htab->elf.srelgot == NULL)
3113 abort ();
3114
3115 outrel.r_offset = (htab->elf.sgot->output_section->vma
3116 + htab->elf.sgot->output_offset + off);
3117
3118 bfd_put_64 (output_bfd, 0,
3119 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3120 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3121 outrel.r_addend = 0;
3122 loc = htab->elf.srelgot->contents;
3123 loc += htab->elf.srelgot->reloc_count++
3124 * sizeof (Elf64_External_Rela);
3125 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3126 htab->tls_ldm_got.offset |= 1;
3127 }
3128 relocation = htab->elf.sgot->output_offset + off;
3129 unresolved_reloc = FALSE;
3130 break;
3131
3132 case R_390_TLS_LE64:
3133 if (bfd_link_dll (info))
3134 {
3135 /* Linking a shared library with non-fpic code requires
3136 a R_390_TLS_TPOFF relocation. */
3137 Elf_Internal_Rela outrel;
3138 asection *sreloc;
3139 bfd_byte *loc;
3140 int indx;
3141
3142 outrel.r_offset = rel->r_offset
3143 + input_section->output_section->vma
3144 + input_section->output_offset;
3145 if (h != NULL && h->dynindx != -1)
3146 indx = h->dynindx;
3147 else
3148 indx = 0;
3149 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3150 if (indx == 0)
3151 outrel.r_addend = relocation - dtpoff_base (info);
3152 else
3153 outrel.r_addend = 0;
3154 sreloc = elf_section_data (input_section)->sreloc;
3155 if (sreloc == NULL)
3156 abort ();
3157 loc = sreloc->contents;
3158 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3159 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3160 }
3161 else
3162 {
3163 BFD_ASSERT (! unresolved_reloc);
3164 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3165 contents + rel->r_offset);
3166 }
3167 continue;
3168
3169 case R_390_TLS_LDO64:
3170 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3171 relocation -= dtpoff_base (info);
3172 else
3173 /* When converting LDO to LE, we must negate. */
3174 relocation = -tpoff (info, relocation);
3175 break;
3176
3177 /* Relocations for tls instructions. */
3178 case R_390_TLS_LOAD:
3179 case R_390_TLS_GDCALL:
3180 case R_390_TLS_LDCALL:
3181 tls_type = GOT_UNKNOWN;
3182 if (h == NULL && local_got_offsets)
3183 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3184 else if (h != NULL)
3185 tls_type = elf_s390_hash_entry(h)->tls_type;
3186
3187 if (tls_type == GOT_TLS_GD)
3188 continue;
3189
3190 if (r_type == R_390_TLS_LOAD)
3191 {
3192 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3193 {
3194 /* IE->LE transition. Four valid cases:
3195 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3196 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3197 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3198 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3199 unsigned int insn0, insn1, ry;
3200
3201 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3202 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3203 if (insn1 != 0x0004)
3204 {
3205 invalid_tls_insn (input_bfd, input_section, rel);
3206 return FALSE;
3207 }
3208 if ((insn0 & 0xff00f000) == 0xe3000000)
3209 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3210 ry = (insn0 & 0x000f0000);
3211 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3212 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3213 ry = (insn0 & 0x0000f000) << 4;
3214 else if ((insn0 & 0xff00f000) == 0xe300c000)
3215 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3216 ry = (insn0 & 0x000f0000);
3217 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3218 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3219 ry = (insn0 & 0x0000f000) << 4;
3220 else
3221 {
3222 invalid_tls_insn (input_bfd, input_section, rel);
3223 return FALSE;
3224 }
3225 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3226 insn1 = 0x000d;
3227 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3228 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3229 }
3230 }
3231 else if (r_type == R_390_TLS_GDCALL)
3232 {
3233 unsigned int insn0, insn1;
3234
3235 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3236 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3237 if ((insn0 & 0xffff0000) != 0xc0e50000)
3238 {
3239 invalid_tls_insn (input_bfd, input_section, rel);
3240 return FALSE;
3241 }
3242 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3243 {
3244 /* GD->LE transition.
3245 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3246 insn0 = 0xc0040000;
3247 insn1 = 0x0000;
3248 }
3249 else
3250 {
3251 /* GD->IE transition.
3252 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3253 insn0 = 0xe322c000;
3254 insn1 = 0x0004;
3255 }
3256 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3257 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3258 }
3259 else if (r_type == R_390_TLS_LDCALL)
3260 {
3261 if (!bfd_link_pic (info))
3262 {
3263 unsigned int insn0, insn1;
3264
3265 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3266 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3267 if ((insn0 & 0xffff0000) != 0xc0e50000)
3268 {
3269 invalid_tls_insn (input_bfd, input_section, rel);
3270 return FALSE;
3271 }
3272 /* LD->LE transition.
3273 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3274 insn0 = 0xc0040000;
3275 insn1 = 0x0000;
3276 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3277 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3278 }
3279 }
3280 continue;
3281
3282 default:
3283 break;
3284 }
3285
3286 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3287 because such sections are not SEC_ALLOC and thus ld.so will
3288 not process them. */
3289 if (unresolved_reloc
3290 && !((input_section->flags & SEC_DEBUGGING) != 0
3291 && h->def_dynamic)
3292 && _bfd_elf_section_offset (output_bfd, info, input_section,
3293 rel->r_offset) != (bfd_vma) -1)
3294 _bfd_error_handler
3295 /* xgettext:c-format */
3296 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3297 input_bfd,
3298 input_section,
3299 rel->r_offset,
3300 howto->name,
3301 h->root.root.string);
3302
3303 do_relocation:
3304
3305 /* When applying a 24 bit reloc we need to start one byte
3306 earlier. Otherwise the 32 bit get/put bfd operations might
3307 access a byte after the actual section. */
3308 if (r_type == R_390_PC24DBL
3309 || r_type == R_390_PLT24DBL)
3310 rel->r_offset--;
3311
3312 if (r_type == R_390_20
3313 || r_type == R_390_GOT20
3314 || r_type == R_390_GOTPLT20
3315 || r_type == R_390_TLS_GOTIE20)
3316 {
3317 relocation += rel->r_addend;
3318 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3319 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3320 contents, rel->r_offset,
3321 relocation, 0);
3322 }
3323 else
3324 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3325 contents, rel->r_offset,
3326 relocation, rel->r_addend);
3327
3328 if (r != bfd_reloc_ok)
3329 {
3330 const char *name;
3331
3332 if (h != NULL)
3333 name = h->root.root.string;
3334 else
3335 {
3336 name = bfd_elf_string_from_elf_section (input_bfd,
3337 symtab_hdr->sh_link,
3338 sym->st_name);
3339 if (name == NULL)
3340 return FALSE;
3341 if (*name == '\0')
3342 name = bfd_section_name (input_bfd, sec);
3343 }
3344
3345 if (r == bfd_reloc_overflow)
3346 (*info->callbacks->reloc_overflow)
3347 (info, (h ? &h->root : NULL), name, howto->name,
3348 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3349 else
3350 {
3351 _bfd_error_handler
3352 /* xgettext:c-format */
3353 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3354 input_bfd, input_section,
3355 rel->r_offset, name, (int) r);
3356 return FALSE;
3357 }
3358 }
3359 }
3360
3361 return TRUE;
3362 }
3363
3364 /* Generate the PLT slots together with the dynamic relocations needed
3365 for IFUNC symbols. */
3366
3367 static void
3368 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3369 struct bfd_link_info *info,
3370 struct elf_link_hash_entry *h,
3371 struct elf_s390_link_hash_table *htab,
3372 bfd_vma plt_offset,
3373 bfd_vma resolver_address)
3374 {
3375 bfd_vma plt_index;
3376 bfd_vma got_offset;
3377 Elf_Internal_Rela rela;
3378 bfd_byte *loc;
3379 asection *plt, *gotplt, *relplt;
3380
3381 if (htab->elf.iplt == NULL
3382 || htab->elf.igotplt == NULL
3383 || htab->elf.irelplt == NULL)
3384 abort ();
3385
3386 /* Index of the PLT slot within iplt section. */
3387 plt_index = plt_offset / PLT_ENTRY_SIZE;
3388 plt = htab->elf.iplt;
3389 /* Offset into the igot.plt section. */
3390 got_offset = plt_index * GOT_ENTRY_SIZE;
3391 gotplt = htab->elf.igotplt;
3392 relplt = htab->elf.irelplt;
3393
3394 /* Fill in the blueprint of a PLT. */
3395 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3396 PLT_ENTRY_SIZE);
3397
3398 /* Fixup the relative address to the GOT entry */
3399 bfd_put_32 (output_bfd,
3400 (gotplt->output_section->vma +
3401 gotplt->output_offset + got_offset
3402 - (plt->output_section->vma +
3403 plt->output_offset +
3404 plt_offset))/2,
3405 plt->contents + plt_offset + 2);
3406 /* Fixup the relative branch to PLT 0 */
3407 bfd_put_32 (output_bfd, - (plt->output_offset +
3408 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3409 plt->contents + plt_offset + 24);
3410 /* Fixup offset into .rela.plt section. */
3411 bfd_put_32 (output_bfd, relplt->output_offset +
3412 plt_index * sizeof (Elf64_External_Rela),
3413 plt->contents + plt_offset + 28);
3414
3415 /* Fill in the entry in the global offset table.
3416 Points to instruction after GOT offset. */
3417 bfd_put_64 (output_bfd,
3418 (plt->output_section->vma
3419 + plt->output_offset
3420 + plt_offset
3421 + 14),
3422 gotplt->contents + got_offset);
3423
3424 /* Fill in the entry in the .rela.plt section. */
3425 rela.r_offset = (gotplt->output_section->vma
3426 + gotplt->output_offset
3427 + got_offset);
3428
3429 if (!h
3430 || h->dynindx == -1
3431 || ((bfd_link_executable (info)
3432 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3433 && h->def_regular))
3434 {
3435 /* The symbol can be locally resolved. */
3436 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3437 rela.r_addend = resolver_address;
3438 }
3439 else
3440 {
3441 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3442 rela.r_addend = 0;
3443 }
3444
3445 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3446 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3447 }
3448
3449
3450 /* Finish up dynamic symbol handling. We set the contents of various
3451 dynamic sections here. */
3452
3453 static bfd_boolean
3454 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3455 struct bfd_link_info *info,
3456 struct elf_link_hash_entry *h,
3457 Elf_Internal_Sym *sym)
3458 {
3459 struct elf_s390_link_hash_table *htab;
3460 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3461
3462 htab = elf_s390_hash_table (info);
3463 if (htab == NULL)
3464 return FALSE;
3465
3466 if (h->plt.offset != (bfd_vma) -1)
3467 {
3468 bfd_vma plt_index;
3469 bfd_vma got_offset;
3470 Elf_Internal_Rela rela;
3471 bfd_byte *loc;
3472
3473 /* This symbol has an entry in the procedure linkage table. Set
3474 it up. */
3475 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3476 {
3477 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3478 htab, h->plt.offset,
3479 eh->ifunc_resolver_address +
3480 eh->ifunc_resolver_section->output_offset +
3481 eh->ifunc_resolver_section->output_section->vma);
3482
3483 /* Do not return yet. Handling of explicit GOT slots of
3484 IFUNC symbols is below. */
3485 }
3486 else
3487 {
3488 if (h->dynindx == -1
3489 || htab->elf.splt == NULL
3490 || htab->elf.sgotplt == NULL
3491 || htab->elf.srelplt == NULL)
3492 abort ();
3493
3494 /* Calc. index no.
3495 Current offset - size first entry / entry size. */
3496 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3497
3498 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3499 addr & GOT addr. */
3500 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3501
3502 /* Fill in the blueprint of a PLT. */
3503 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3504 PLT_ENTRY_SIZE);
3505
3506 /* Fixup the relative address to the GOT entry */
3507 bfd_put_32 (output_bfd,
3508 (htab->elf.sgotplt->output_section->vma +
3509 htab->elf.sgotplt->output_offset + got_offset
3510 - (htab->elf.splt->output_section->vma +
3511 htab->elf.splt->output_offset +
3512 h->plt.offset))/2,
3513 htab->elf.splt->contents + h->plt.offset + 2);
3514 /* Fixup the relative branch to PLT 0 */
3515 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3516 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3517 htab->elf.splt->contents + h->plt.offset + 24);
3518 /* Fixup offset into .rela.plt section. */
3519 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3520 htab->elf.splt->contents + h->plt.offset + 28);
3521
3522 /* Fill in the entry in the global offset table.
3523 Points to instruction after GOT offset. */
3524 bfd_put_64 (output_bfd,
3525 (htab->elf.splt->output_section->vma
3526 + htab->elf.splt->output_offset
3527 + h->plt.offset
3528 + 14),
3529 htab->elf.sgotplt->contents + got_offset);
3530
3531 /* Fill in the entry in the .rela.plt section. */
3532 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3533 + htab->elf.sgotplt->output_offset
3534 + got_offset);
3535 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3536 rela.r_addend = 0;
3537 loc = htab->elf.srelplt->contents + plt_index *
3538 sizeof (Elf64_External_Rela);
3539 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3540
3541 if (!h->def_regular)
3542 {
3543 /* Mark the symbol as undefined, rather than as defined in
3544 the .plt section. Leave the value alone. This is a clue
3545 for the dynamic linker, to make function pointer
3546 comparisons work between an application and shared
3547 library. */
3548 sym->st_shndx = SHN_UNDEF;
3549 }
3550 }
3551 }
3552
3553 if (h->got.offset != (bfd_vma) -1
3554 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3555 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3556 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3557 {
3558 Elf_Internal_Rela rela;
3559 bfd_byte *loc;
3560
3561 /* This symbol has an entry in the global offset table. Set it
3562 up. */
3563 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3564 abort ();
3565
3566 rela.r_offset = (htab->elf.sgot->output_section->vma
3567 + htab->elf.sgot->output_offset
3568 + (h->got.offset &~ (bfd_vma) 1));
3569
3570 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3571 {
3572 if (bfd_link_pic (info))
3573 {
3574 /* An explicit GOT slot usage needs GLOB_DAT. If the
3575 symbol references local the implicit got.iplt slot
3576 will be used and the IRELATIVE reloc has been created
3577 above. */
3578 goto do_glob_dat;
3579 }
3580 else
3581 {
3582 /* For non-shared objects explicit GOT slots must be
3583 filled with the PLT slot address for pointer
3584 equality reasons. */
3585 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3586 + htab->elf.iplt->output_offset
3587 + h->plt.offset),
3588 htab->elf.sgot->contents + h->got.offset);
3589 return TRUE;
3590 }
3591 }
3592 else if (bfd_link_pic (info)
3593 && SYMBOL_REFERENCES_LOCAL (info, h))
3594 {
3595 /* If this is a static link, or it is a -Bsymbolic link and
3596 the symbol is defined locally or was forced to be local
3597 because of a version file, we just want to emit a
3598 RELATIVE reloc. The entry in the global offset table
3599 will already have been initialized in the
3600 relocate_section function. */
3601 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3602 return FALSE;
3603 BFD_ASSERT((h->got.offset & 1) != 0);
3604 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3605 rela.r_addend = (h->root.u.def.value
3606 + h->root.u.def.section->output_section->vma
3607 + h->root.u.def.section->output_offset);
3608 }
3609 else
3610 {
3611 BFD_ASSERT((h->got.offset & 1) == 0);
3612 do_glob_dat:
3613 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3614 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3615 rela.r_addend = 0;
3616 }
3617
3618 loc = htab->elf.srelgot->contents;
3619 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3620 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3621 }
3622
3623 if (h->needs_copy)
3624 {
3625 Elf_Internal_Rela rela;
3626 asection *s;
3627 bfd_byte *loc;
3628
3629 /* This symbols needs a copy reloc. Set it up. */
3630
3631 if (h->dynindx == -1
3632 || (h->root.type != bfd_link_hash_defined
3633 && h->root.type != bfd_link_hash_defweak)
3634 || htab->elf.srelbss == NULL)
3635 abort ();
3636
3637 rela.r_offset = (h->root.u.def.value
3638 + h->root.u.def.section->output_section->vma
3639 + h->root.u.def.section->output_offset);
3640 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3641 rela.r_addend = 0;
3642 if (h->root.u.def.section == htab->elf.sdynrelro)
3643 s = htab->elf.sreldynrelro;
3644 else
3645 s = htab->elf.srelbss;
3646 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3647 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3648 }
3649
3650 /* Mark some specially defined symbols as absolute. */
3651 if (h == htab->elf.hdynamic
3652 || h == htab->elf.hgot
3653 || h == htab->elf.hplt)
3654 sym->st_shndx = SHN_ABS;
3655
3656 return TRUE;
3657 }
3658
3659 /* Used to decide how to sort relocs in an optimal manner for the
3660 dynamic linker, before writing them out. */
3661
3662 static enum elf_reloc_type_class
3663 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3664 const asection *rel_sec ATTRIBUTE_UNUSED,
3665 const Elf_Internal_Rela *rela)
3666 {
3667 bfd *abfd = info->output_bfd;
3668 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3669 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3670 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3671 Elf_Internal_Sym sym;
3672
3673 if (htab->elf.dynsym == NULL
3674 || !bed->s->swap_symbol_in (abfd,
3675 (htab->elf.dynsym->contents
3676 + r_symndx * bed->s->sizeof_sym),
3677 0, &sym))
3678 abort ();
3679
3680 /* Check relocation against STT_GNU_IFUNC symbol. */
3681 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3682 return reloc_class_ifunc;
3683
3684 switch ((int) ELF64_R_TYPE (rela->r_info))
3685 {
3686 case R_390_RELATIVE:
3687 return reloc_class_relative;
3688 case R_390_JMP_SLOT:
3689 return reloc_class_plt;
3690 case R_390_COPY:
3691 return reloc_class_copy;
3692 default:
3693 return reloc_class_normal;
3694 }
3695 }
3696
3697 /* Finish up the dynamic sections. */
3698
3699 static bfd_boolean
3700 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3701 struct bfd_link_info *info)
3702 {
3703 struct elf_s390_link_hash_table *htab;
3704 bfd *dynobj;
3705 asection *sdyn;
3706 bfd *ibfd;
3707 unsigned int i;
3708
3709 htab = elf_s390_hash_table (info);
3710 if (htab == NULL)
3711 return FALSE;
3712
3713 dynobj = htab->elf.dynobj;
3714 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3715
3716 if (htab->elf.dynamic_sections_created)
3717 {
3718 Elf64_External_Dyn *dyncon, *dynconend;
3719
3720 if (sdyn == NULL || htab->elf.sgot == NULL)
3721 abort ();
3722
3723 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3724 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3725 for (; dyncon < dynconend; dyncon++)
3726 {
3727 Elf_Internal_Dyn dyn;
3728 asection *s;
3729
3730 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3731
3732 switch (dyn.d_tag)
3733 {
3734 default:
3735 continue;
3736
3737 case DT_PLTGOT:
3738 s = htab->elf.sgotplt;
3739 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3740 break;
3741
3742 case DT_JMPREL:
3743 s = htab->elf.srelplt;
3744 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3745 break;
3746
3747 case DT_PLTRELSZ:
3748 dyn.d_un.d_val = htab->elf.srelplt->size;
3749 if (htab->elf.irelplt)
3750 dyn.d_un.d_val += htab->elf.irelplt->size;
3751 break;
3752
3753 case DT_RELASZ:
3754 /* The procedure linkage table relocs (DT_JMPREL) should
3755 not be included in the overall relocs (DT_RELA).
3756 Therefore, we override the DT_RELASZ entry here to
3757 make it not include the JMPREL relocs. Since the
3758 linker script arranges for .rela.plt to follow all
3759 other relocation sections, we don't have to worry
3760 about changing the DT_RELA entry. */
3761 dyn.d_un.d_val -= htab->elf.srelplt->size;
3762 if (htab->elf.irelplt)
3763 dyn.d_un.d_val -= htab->elf.irelplt->size;
3764 break;
3765 }
3766
3767 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3768 }
3769
3770 /* Fill in the special first entry in the procedure linkage table. */
3771 if (htab->elf.splt && htab->elf.splt->size > 0)
3772 {
3773 /* fill in blueprint for plt 0 entry */
3774 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3775 PLT_FIRST_ENTRY_SIZE);
3776 /* Fixup relative address to start of GOT */
3777 bfd_put_32 (output_bfd,
3778 (htab->elf.sgotplt->output_section->vma
3779 + htab->elf.sgotplt->output_offset
3780 - htab->elf.splt->output_section->vma
3781 - htab->elf.splt->output_offset - 6)/2,
3782 htab->elf.splt->contents + 8);
3783 }
3784 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3785 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3786 = PLT_ENTRY_SIZE;
3787 }
3788
3789 if (htab->elf.sgotplt)
3790 {
3791 /* Fill in the first three entries in the global offset table. */
3792 if (htab->elf.sgotplt->size > 0)
3793 {
3794 bfd_put_64 (output_bfd,
3795 (sdyn == NULL ? (bfd_vma) 0
3796 : sdyn->output_section->vma + sdyn->output_offset),
3797 htab->elf.sgotplt->contents);
3798 /* One entry for shared object struct ptr. */
3799 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3800 /* One entry for _dl_runtime_resolve. */
3801 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
3802 }
3803
3804 elf_section_data (htab->elf.sgot->output_section)
3805 ->this_hdr.sh_entsize = 8;
3806 }
3807
3808 /* Finish dynamic symbol for local IFUNC symbols. */
3809 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3810 {
3811 struct plt_entry *local_plt;
3812 Elf_Internal_Sym *isym;
3813 Elf_Internal_Shdr *symtab_hdr;
3814
3815 symtab_hdr = &elf_symtab_hdr (ibfd);
3816
3817 if (!is_s390_elf (ibfd))
3818 continue;
3819
3820 local_plt = elf_s390_local_plt (ibfd);
3821 if (local_plt != NULL)
3822 for (i = 0; i < symtab_hdr->sh_info; i++)
3823 {
3824 if (local_plt[i].plt.offset != (bfd_vma) -1)
3825 {
3826 asection *sec = local_plt[i].sec;
3827 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3828 if (isym == NULL)
3829 return FALSE;
3830
3831 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3832 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3833 local_plt[i].plt.offset,
3834 isym->st_value
3835 + sec->output_section->vma
3836 + sec->output_offset);
3837
3838 }
3839 }
3840 }
3841
3842 return TRUE;
3843 }
3844 \f
3845 /* Support for core dump NOTE sections. */
3846
3847 static bfd_boolean
3848 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3849 {
3850 int offset;
3851 size_t size;
3852
3853 switch (note->descsz)
3854 {
3855 default:
3856 return FALSE;
3857
3858 case 336: /* sizeof(struct elf_prstatus) on s390x */
3859 /* pr_cursig */
3860 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3861
3862 /* pr_pid */
3863 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3864
3865 /* pr_reg */
3866 offset = 112;
3867 size = 216;
3868 break;
3869 }
3870
3871 /* Make a ".reg/999" section. */
3872 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3873 size, note->descpos + offset);
3874 }
3875
3876 static bfd_boolean
3877 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3878 {
3879 switch (note->descsz)
3880 {
3881 default:
3882 return FALSE;
3883
3884 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3885 elf_tdata (abfd)->core->pid
3886 = bfd_get_32 (abfd, note->descdata + 24);
3887 elf_tdata (abfd)->core->program
3888 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3889 elf_tdata (abfd)->core->command
3890 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3891 }
3892
3893 /* Note that for some reason, a spurious space is tacked
3894 onto the end of the args in some (at least one anyway)
3895 implementations, so strip it off if it exists. */
3896
3897 {
3898 char *command = elf_tdata (abfd)->core->command;
3899 int n = strlen (command);
3900
3901 if (0 < n && command[n - 1] == ' ')
3902 command[n - 1] = '\0';
3903 }
3904
3905 return TRUE;
3906 }
3907
3908 static char *
3909 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3910 int note_type, ...)
3911 {
3912 va_list ap;
3913
3914 switch (note_type)
3915 {
3916 default:
3917 return NULL;
3918
3919 case NT_PRPSINFO:
3920 {
3921 char data[136] = { 0 };
3922 const char *fname, *psargs;
3923
3924 va_start (ap, note_type);
3925 fname = va_arg (ap, const char *);
3926 psargs = va_arg (ap, const char *);
3927 va_end (ap);
3928
3929 strncpy (data + 40, fname, 16);
3930 strncpy (data + 56, psargs, 80);
3931 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3932 &data, sizeof (data));
3933 }
3934
3935 case NT_PRSTATUS:
3936 {
3937 char data[336] = { 0 };
3938 long pid;
3939 int cursig;
3940 const void *gregs;
3941
3942 va_start (ap, note_type);
3943 pid = va_arg (ap, long);
3944 cursig = va_arg (ap, int);
3945 gregs = va_arg (ap, const void *);
3946 va_end (ap);
3947
3948 bfd_put_16 (abfd, cursig, data + 12);
3949 bfd_put_32 (abfd, pid, data + 32);
3950 memcpy (data + 112, gregs, 216);
3951 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3952 &data, sizeof (data));
3953 }
3954 }
3955 /* NOTREACHED */
3956 }
3957 \f
3958 /* Return address for Ith PLT stub in section PLT, for relocation REL
3959 or (bfd_vma) -1 if it should not be included. */
3960
3961 static bfd_vma
3962 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3963 const arelent *rel ATTRIBUTE_UNUSED)
3964 {
3965 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3966 }
3967
3968 /* Merge backend specific data from an object file to the output
3969 object file when linking. */
3970
3971 static bfd_boolean
3972 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3973 {
3974 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3975 return TRUE;
3976
3977 return elf_s390_merge_obj_attributes (ibfd, info);
3978 }
3979
3980 /* We may add a PT_S390_PGSTE program header. */
3981
3982 static int
3983 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3984 struct bfd_link_info *info)
3985 {
3986 struct elf_s390_link_hash_table *htab;
3987
3988 if (info)
3989 {
3990 htab = elf_s390_hash_table (info);
3991 if (htab)
3992 return htab->params->pgste;
3993 }
3994 return 0;
3995 }
3996
3997
3998 /* Add the PT_S390_PGSTE program header. */
3999
4000 static bfd_boolean
4001 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
4002 {
4003 struct elf_s390_link_hash_table *htab;
4004 struct elf_segment_map *m, *pm = NULL;
4005
4006 if (!abfd || !info)
4007 return TRUE;
4008
4009 htab = elf_s390_hash_table (info);
4010 if (!htab || !htab->params->pgste)
4011 return TRUE;
4012
4013 /* If there is already a PT_S390_PGSTE header, avoid adding
4014 another. */
4015 m = elf_seg_map (abfd);
4016 while (m && m->p_type != PT_S390_PGSTE)
4017 {
4018 pm = m;
4019 m = m->next;
4020 }
4021
4022 if (m)
4023 return TRUE;
4024
4025 m = (struct elf_segment_map *)
4026 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
4027 if (m == NULL)
4028 return FALSE;
4029 m->p_type = PT_S390_PGSTE;
4030 m->count = 0;
4031 m->next = NULL;
4032 if (pm)
4033 pm->next = m;
4034
4035 return TRUE;
4036 }
4037
4038 bfd_boolean
4039 bfd_elf_s390_set_options (struct bfd_link_info *info,
4040 struct s390_elf_params *params)
4041 {
4042 struct elf_s390_link_hash_table *htab;
4043
4044 if (info)
4045 {
4046 htab = elf_s390_hash_table (info);
4047 if (htab)
4048 htab->params = params;
4049 }
4050
4051 return TRUE;
4052 }
4053
4054
4055 /* Why was the hash table entry size definition changed from
4056 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
4057 this is the only reason for the s390_elf64_size_info structure. */
4058
4059 const struct elf_size_info s390_elf64_size_info =
4060 {
4061 sizeof (Elf64_External_Ehdr),
4062 sizeof (Elf64_External_Phdr),
4063 sizeof (Elf64_External_Shdr),
4064 sizeof (Elf64_External_Rel),
4065 sizeof (Elf64_External_Rela),
4066 sizeof (Elf64_External_Sym),
4067 sizeof (Elf64_External_Dyn),
4068 sizeof (Elf_External_Note),
4069 8, /* hash-table entry size. */
4070 1, /* internal relocations per external relocations. */
4071 64, /* arch_size. */
4072 3, /* log_file_align. */
4073 ELFCLASS64, EV_CURRENT,
4074 bfd_elf64_write_out_phdrs,
4075 bfd_elf64_write_shdrs_and_ehdr,
4076 bfd_elf64_checksum_contents,
4077 bfd_elf64_write_relocs,
4078 bfd_elf64_swap_symbol_in,
4079 bfd_elf64_swap_symbol_out,
4080 bfd_elf64_slurp_reloc_table,
4081 bfd_elf64_slurp_symbol_table,
4082 bfd_elf64_swap_dyn_in,
4083 bfd_elf64_swap_dyn_out,
4084 bfd_elf64_swap_reloc_in,
4085 bfd_elf64_swap_reloc_out,
4086 bfd_elf64_swap_reloca_in,
4087 bfd_elf64_swap_reloca_out
4088 };
4089
4090 #define TARGET_BIG_SYM s390_elf64_vec
4091 #define TARGET_BIG_NAME "elf64-s390"
4092 #define ELF_ARCH bfd_arch_s390
4093 #define ELF_TARGET_ID S390_ELF_DATA
4094 #define ELF_MACHINE_CODE EM_S390
4095 #define ELF_MACHINE_ALT1 EM_S390_OLD
4096 #define ELF_MAXPAGESIZE 0x1000
4097
4098 #define elf_backend_size_info s390_elf64_size_info
4099
4100 #define elf_backend_can_gc_sections 1
4101 #define elf_backend_can_refcount 1
4102 #define elf_backend_want_got_plt 1
4103 #define elf_backend_plt_readonly 1
4104 #define elf_backend_want_plt_sym 0
4105 #define elf_backend_got_header_size 24
4106 #define elf_backend_want_dynrelro 1
4107 #define elf_backend_rela_normal 1
4108
4109 #define elf_info_to_howto elf_s390_info_to_howto
4110
4111 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
4112 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
4113 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4114 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4115 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
4116
4117 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4118 #define elf_backend_check_relocs elf_s390_check_relocs
4119 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4120 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4121 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4122 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4123 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4124 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4125 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4126 #define elf_backend_relocate_section elf_s390_relocate_section
4127 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4128 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4129 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4130 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4131 #define elf_backend_write_core_note elf_s390_write_core_note
4132 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4133 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4134 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4135 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
4136 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
4137
4138 #define bfd_elf64_mkobject elf_s390_mkobject
4139 #define elf_backend_object_p elf_s390_object_p
4140
4141 #include "elf64-target.h"
GDB Binutils - Deliverables
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