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ELF: Copy dyn_relocs in _bfd_elf_link_hash_copy_indirect
[thirdparty/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2020 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,
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
327 /* xgettext:c-format */
328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
329 bfd_set_error (bfd_error_bad_value);
330 return NULL;
331 }
332
333 static reloc_howto_type *
334 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
335 const char *r_name)
336 {
337 unsigned int i;
338
339 for (i = 0;
340 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
341 i++)
342 if (elf_howto_table[i].name != NULL
343 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
344 return &elf_howto_table[i];
345
346 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
347 return &elf64_s390_vtinherit_howto;
348 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
349 return &elf64_s390_vtentry_howto;
350
351 return NULL;
352 }
353
354 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
355 and elf64-s390.c has its own copy. */
356
357 static bfd_boolean
358 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
359 arelent *cache_ptr,
360 Elf_Internal_Rela *dst)
361 {
362 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
363
364 switch (r_type)
365 {
366 case R_390_GNU_VTINHERIT:
367 cache_ptr->howto = &elf64_s390_vtinherit_howto;
368 break;
369
370 case R_390_GNU_VTENTRY:
371 cache_ptr->howto = &elf64_s390_vtentry_howto;
372 break;
373
374 default:
375 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
376 {
377 /* xgettext:c-format */
378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
379 abfd, r_type);
380 bfd_set_error (bfd_error_bad_value);
381 return FALSE;
382 }
383 cache_ptr->howto = &elf_howto_table[r_type];
384 }
385 return TRUE;
386 }
387
388 /* A relocation function which doesn't do anything. */
389 static bfd_reloc_status_type
390 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
391 arelent *reloc_entry,
392 asymbol *symbol ATTRIBUTE_UNUSED,
393 void * data ATTRIBUTE_UNUSED,
394 asection *input_section,
395 bfd *output_bfd,
396 char **error_message ATTRIBUTE_UNUSED)
397 {
398 if (output_bfd)
399 reloc_entry->address += input_section->output_offset;
400 return bfd_reloc_ok;
401 }
402
403 /* Handle the large displacement relocs. */
404 static bfd_reloc_status_type
405 s390_elf_ldisp_reloc (bfd *abfd,
406 arelent *reloc_entry,
407 asymbol *symbol,
408 void * data,
409 asection *input_section,
410 bfd *output_bfd,
411 char **error_message ATTRIBUTE_UNUSED)
412 {
413 reloc_howto_type *howto = reloc_entry->howto;
414 bfd_vma relocation;
415 bfd_vma insn;
416
417 if (output_bfd != (bfd *) NULL
418 && (symbol->flags & BSF_SECTION_SYM) == 0
419 && (! howto->partial_inplace
420 || reloc_entry->addend == 0))
421 {
422 reloc_entry->address += input_section->output_offset;
423 return bfd_reloc_ok;
424 }
425 if (output_bfd != NULL)
426 return bfd_reloc_continue;
427
428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
429 return bfd_reloc_outofrange;
430
431 relocation = (symbol->value
432 + symbol->section->output_section->vma
433 + symbol->section->output_offset);
434 relocation += reloc_entry->addend;
435 if (howto->pc_relative)
436 {
437 relocation -= (input_section->output_section->vma
438 + input_section->output_offset);
439 relocation -= reloc_entry->address;
440 }
441
442 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
443 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
444 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
445
446 if ((bfd_signed_vma) relocation < - 0x80000
447 || (bfd_signed_vma) relocation > 0x7ffff)
448 return bfd_reloc_overflow;
449 else
450 return bfd_reloc_ok;
451 }
452
453 static bfd_boolean
454 elf_s390_is_local_label_name (bfd *abfd, const char *name)
455 {
456 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
457 return TRUE;
458
459 return _bfd_elf_is_local_label_name (abfd, name);
460 }
461
462 /* Functions for the 390 ELF linker. */
463
464 /* The name of the dynamic interpreter. This is put in the .interp
465 section. */
466
467 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
468
469 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
470 copying dynamic variables from a shared lib into an app's dynbss
471 section, and instead use a dynamic relocation to point into the
472 shared lib. */
473 #define ELIMINATE_COPY_RELOCS 1
474
475 /* The size in bytes of the first entry in the procedure linkage table. */
476 #define PLT_FIRST_ENTRY_SIZE 32
477 /* The size in bytes of an entry in the procedure linkage table. */
478 #define PLT_ENTRY_SIZE 32
479
480 #define GOT_ENTRY_SIZE 8
481
482 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
483
484 /* The first three entries in a global offset table are reserved,
485 and the initial contents are unimportant (we zero them out).
486 Subsequent entries look like this. See the SVR4 ABI 386
487 supplement to see how this works. */
488
489 /* For the s390, simple addr offset can only be 0 - 4096.
490 To use the full 16777216 TB address space, several instructions
491 are needed to load an address in a register and execute
492 a branch( or just saving the address)
493
494 Furthermore, only r 0 and 1 are free to use!!! */
495
496 /* The first 3 words in the GOT are then reserved.
497 Word 0 is the address of the dynamic table.
498 Word 1 is a pointer to a structure describing the object
499 Word 2 is used to point to the loader entry address.
500
501 The code for PLT entries looks like this:
502
503 The GOT holds the address in the PLT to be executed.
504 The loader then gets:
505 48(15) = Pointer to the structure describing the object.
506 56(15) = Offset in symbol table
507 The loader must then find the module where the function is
508 and insert the address in the GOT.
509
510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
511 LG 1,0(1) # 6 bytes Load address from GOT in r1
512 BCR 15,1 # 2 bytes Jump to address
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1
515 BRCL 15,-x # 6 bytes Jump to first PLT entry
516 .long ? # 4 bytes offset into .rela.plt
517
518 Total = 32 bytes per PLT entry
519 Fixup at offset 2: relative address to GOT entry
520 Fixup at offset 22: relative branch to PLT0
521 Fixup at offset 28: 32 bit offset into .rela.plt
522
523 A 32 bit offset into the symbol table is enough. It allows for
524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
525 object (the main program, any shared library) is limited to 4GB in
526 size. Having a .rela.plt of 2GB would already make the .plt
527 section bigger than 8GB. */
528
529 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
530 {
531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
533 0x07, 0xf1, /* br %r1 */
534 0x0d, 0x10, /* basr %r1,%r0 */
535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
538 };
539
540 /* The first PLT entry pushes the offset into the symbol table
541 from R1 onto the stack at 56(15) and the loader object info
542 at 48(15), loads the loader address in R1 and jumps to it. */
543
544 /* The first entry in the PLT:
545
546 PLT0:
547 STG 1,56(15) # r1 contains the offset into the symbol table
548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
550 LG 1,16(1) # get entry address of loader
551 BCR 15,1 # jump to loader
552
553 Fixup at offset 8: relative address to start of GOT. */
554
555 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
556 {
557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
561 0x07, 0xf1, /* br %r1 */
562 0x07, 0x00, /* nopr %r0 */
563 0x07, 0x00, /* nopr %r0 */
564 0x07, 0x00 /* nopr %r0 */
565 };
566
567
568 /* s390 ELF linker hash entry. */
569
570 struct elf_s390_link_hash_entry
571 {
572 struct elf_link_hash_entry elf;
573
574 /* Number of GOTPLT references for a function. */
575 bfd_signed_vma gotplt_refcount;
576
577 #define GOT_UNKNOWN 0
578 #define GOT_NORMAL 1
579 #define GOT_TLS_GD 2
580 #define GOT_TLS_IE 3
581 #define GOT_TLS_IE_NLT 3
582 unsigned char tls_type;
583
584 /* For pointer equality reasons we might need to change the symbol
585 type from STT_GNU_IFUNC to STT_FUNC together with its value and
586 section entry. So after alloc_dynrelocs only these values should
587 be used. In order to check whether a symbol is IFUNC use
588 s390_is_ifunc_symbol_p. */
589 bfd_vma ifunc_resolver_address;
590 asection *ifunc_resolver_section;
591 };
592
593 #define elf_s390_hash_entry(ent) \
594 ((struct elf_s390_link_hash_entry *)(ent))
595
596 /* This structure represents an entry in the local PLT list needed for
597 local IFUNC symbols. */
598 struct plt_entry
599 {
600 /* The section of the local symbol.
601 Set in relocate_section and used in finish_dynamic_sections. */
602 asection *sec;
603
604 union
605 {
606 bfd_signed_vma refcount;
607 bfd_vma offset;
608 } plt;
609 };
610
611 /* NOTE: Keep this structure in sync with
612 the one declared in elf32-s390.c. */
613 struct elf_s390_obj_tdata
614 {
615 struct elf_obj_tdata root;
616
617 /* A local PLT is needed for ifunc symbols. */
618 struct plt_entry *local_plt;
619
620 /* TLS type for each local got entry. */
621 char *local_got_tls_type;
622 };
623
624 #define elf_s390_tdata(abfd) \
625 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
626
627 #define elf_s390_local_plt(abfd) \
628 (elf_s390_tdata (abfd)->local_plt)
629
630 #define elf_s390_local_got_tls_type(abfd) \
631 (elf_s390_tdata (abfd)->local_got_tls_type)
632
633 #define is_s390_elf(bfd) \
634 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
635 && elf_tdata (bfd) != NULL \
636 && elf_object_id (bfd) == S390_ELF_DATA)
637
638 static bfd_boolean
639 elf_s390_mkobject (bfd *abfd)
640 {
641 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
642 S390_ELF_DATA);
643 }
644
645 static bfd_boolean
646 elf_s390_object_p (bfd *abfd)
647 {
648 /* Set the right machine number for an s390 elf32 file. */
649 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
650 }
651
652 /* s390 ELF linker hash table. */
653
654 struct elf_s390_link_hash_table
655 {
656 struct elf_link_hash_table elf;
657
658 /* Short-cuts to get to dynamic linker sections. */
659 asection *irelifunc;
660
661 union {
662 bfd_signed_vma refcount;
663 bfd_vma offset;
664 } tls_ldm_got;
665
666 /* Small local sym cache. */
667 struct sym_cache sym_cache;
668
669 /* Options passed from the linker. */
670 struct s390_elf_params *params;
671 };
672
673 /* Get the s390 ELF linker hash table from a link_info structure. */
674
675 #define elf_s390_hash_table(p) \
676 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
677 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
678
679 #define ELF64 1
680 #include "elf-s390-common.c"
681
682 /* Create an entry in an s390 ELF linker hash table. */
683
684 static struct bfd_hash_entry *
685 link_hash_newfunc (struct bfd_hash_entry *entry,
686 struct bfd_hash_table *table,
687 const char *string)
688 {
689 /* Allocate the structure if it has not already been allocated by a
690 subclass. */
691 if (entry == NULL)
692 {
693 entry = bfd_hash_allocate (table,
694 sizeof (struct elf_s390_link_hash_entry));
695 if (entry == NULL)
696 return entry;
697 }
698
699 /* Call the allocation method of the superclass. */
700 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
701 if (entry != NULL)
702 {
703 struct elf_s390_link_hash_entry *eh;
704
705 eh = (struct elf_s390_link_hash_entry *) entry;
706 eh->gotplt_refcount = 0;
707 eh->tls_type = GOT_UNKNOWN;
708 eh->ifunc_resolver_address = 0;
709 eh->ifunc_resolver_section = NULL;
710 }
711
712 return entry;
713 }
714
715 /* Create an s390 ELF linker hash table. */
716
717 static struct bfd_link_hash_table *
718 elf_s390_link_hash_table_create (bfd *abfd)
719 {
720 struct elf_s390_link_hash_table *ret;
721 size_t amt = sizeof (struct elf_s390_link_hash_table);
722
723 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
724 if (ret == NULL)
725 return NULL;
726
727 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
728 sizeof (struct elf_s390_link_hash_entry),
729 S390_ELF_DATA))
730 {
731 free (ret);
732 return NULL;
733 }
734
735 return &ret->elf.root;
736 }
737
738 /* Copy the extra info we tack onto an elf_link_hash_entry. */
739
740 static void
741 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
742 struct elf_link_hash_entry *dir,
743 struct elf_link_hash_entry *ind)
744 {
745 struct elf_s390_link_hash_entry *edir, *eind;
746
747 edir = (struct elf_s390_link_hash_entry *) dir;
748 eind = (struct elf_s390_link_hash_entry *) ind;
749
750 if (ind->root.type == bfd_link_hash_indirect
751 && dir->got.refcount <= 0)
752 {
753 edir->tls_type = eind->tls_type;
754 eind->tls_type = GOT_UNKNOWN;
755 }
756
757 if (ELIMINATE_COPY_RELOCS
758 && ind->root.type != bfd_link_hash_indirect
759 && dir->dynamic_adjusted)
760 {
761 /* If called to transfer flags for a weakdef during processing
762 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
763 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
764 if (dir->versioned != versioned_hidden)
765 dir->ref_dynamic |= ind->ref_dynamic;
766 dir->ref_regular |= ind->ref_regular;
767 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
768 dir->needs_plt |= ind->needs_plt;
769 }
770 else
771 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
772 }
773
774 static int
775 elf_s390_tls_transition (struct bfd_link_info *info,
776 int r_type,
777 int is_local)
778 {
779 if (bfd_link_pic (info))
780 return r_type;
781
782 switch (r_type)
783 {
784 case R_390_TLS_GD64:
785 case R_390_TLS_IE64:
786 if (is_local)
787 return R_390_TLS_LE64;
788 return R_390_TLS_IE64;
789 case R_390_TLS_GOTIE64:
790 if (is_local)
791 return R_390_TLS_LE64;
792 return R_390_TLS_GOTIE64;
793 case R_390_TLS_LDM64:
794 return R_390_TLS_LE64;
795 }
796
797 return r_type;
798 }
799
800 /* Look through the relocs for a section during the first phase, and
801 allocate space in the global offset table or procedure linkage
802 table. */
803
804 static bfd_boolean
805 elf_s390_check_relocs (bfd *abfd,
806 struct bfd_link_info *info,
807 asection *sec,
808 const Elf_Internal_Rela *relocs)
809 {
810 struct elf_s390_link_hash_table *htab;
811 Elf_Internal_Shdr *symtab_hdr;
812 struct elf_link_hash_entry **sym_hashes;
813 const Elf_Internal_Rela *rel;
814 const Elf_Internal_Rela *rel_end;
815 asection *sreloc;
816 bfd_signed_vma *local_got_refcounts;
817 int tls_type, old_tls_type;
818
819 if (bfd_link_relocatable (info))
820 return TRUE;
821
822 BFD_ASSERT (is_s390_elf (abfd));
823
824 htab = elf_s390_hash_table (info);
825 if (htab == NULL)
826 return FALSE;
827
828 symtab_hdr = &elf_symtab_hdr (abfd);
829 sym_hashes = elf_sym_hashes (abfd);
830 local_got_refcounts = elf_local_got_refcounts (abfd);
831
832 sreloc = NULL;
833
834 rel_end = relocs + sec->reloc_count;
835 for (rel = relocs; rel < rel_end; rel++)
836 {
837 unsigned int r_type;
838 unsigned int r_symndx;
839 struct elf_link_hash_entry *h;
840 Elf_Internal_Sym *isym;
841
842 r_symndx = ELF64_R_SYM (rel->r_info);
843
844 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
845 {
846 /* xgettext:c-format */
847 _bfd_error_handler (_("%pB: bad symbol index: %d"),
848 abfd, r_symndx);
849 return FALSE;
850 }
851
852 if (r_symndx < symtab_hdr->sh_info)
853 {
854 /* A local symbol. */
855 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
856 abfd, r_symndx);
857 if (isym == NULL)
858 return FALSE;
859
860 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
861 {
862 struct plt_entry *plt;
863
864 if (htab->elf.dynobj == NULL)
865 htab->elf.dynobj = abfd;
866
867 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
868 return FALSE;
869
870 if (local_got_refcounts == NULL)
871 {
872 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
873 return FALSE;
874 local_got_refcounts = elf_local_got_refcounts (abfd);
875 }
876 plt = elf_s390_local_plt (abfd);
877 plt[r_symndx].plt.refcount++;
878 }
879 h = NULL;
880 }
881 else
882 {
883 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
884 while (h->root.type == bfd_link_hash_indirect
885 || h->root.type == bfd_link_hash_warning)
886 h = (struct elf_link_hash_entry *) h->root.u.i.link;
887 }
888
889 /* Create got section and local_got_refcounts array if they
890 are needed. */
891 r_type = elf_s390_tls_transition (info,
892 ELF64_R_TYPE (rel->r_info),
893 h == NULL);
894 switch (r_type)
895 {
896 case R_390_GOT12:
897 case R_390_GOT16:
898 case R_390_GOT20:
899 case R_390_GOT32:
900 case R_390_GOT64:
901 case R_390_GOTENT:
902 case R_390_GOTPLT12:
903 case R_390_GOTPLT16:
904 case R_390_GOTPLT20:
905 case R_390_GOTPLT32:
906 case R_390_GOTPLT64:
907 case R_390_GOTPLTENT:
908 case R_390_TLS_GD64:
909 case R_390_TLS_GOTIE12:
910 case R_390_TLS_GOTIE20:
911 case R_390_TLS_GOTIE64:
912 case R_390_TLS_IEENT:
913 case R_390_TLS_IE64:
914 case R_390_TLS_LDM64:
915 if (h == NULL
916 && local_got_refcounts == NULL)
917 {
918 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
919 return FALSE;
920 local_got_refcounts = elf_local_got_refcounts (abfd);
921 }
922
923 /* Fall through. */
924 case R_390_GOTOFF16:
925 case R_390_GOTOFF32:
926 case R_390_GOTOFF64:
927 case R_390_GOTPC:
928 case R_390_GOTPCDBL:
929 if (htab->elf.sgot == NULL)
930 {
931 if (htab->elf.dynobj == NULL)
932 htab->elf.dynobj = abfd;
933 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
934 return FALSE;
935 }
936 }
937
938 if (h != NULL)
939 {
940 if (htab->elf.dynobj == NULL)
941 htab->elf.dynobj = abfd;
942 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
943 return FALSE;
944
945 /* Make sure an IFUNC symbol defined in a non-shared object
946 always gets a PLT slot. */
947 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
948 {
949 /* The symbol is called by the dynamic loader in order
950 to resolve the relocation. So it is in fact also
951 referenced. */
952 h->ref_regular = 1;
953 h->needs_plt = 1;
954 }
955 }
956
957 switch (r_type)
958 {
959 case R_390_GOTPC:
960 case R_390_GOTPCDBL:
961 /* These relocs do not need a GOT slot. They just load the
962 GOT pointer itself or address something else relative to
963 the GOT. Since the GOT pointer has been set up above we
964 are done. */
965 break;
966 case R_390_GOTOFF16:
967 case R_390_GOTOFF32:
968 case R_390_GOTOFF64:
969 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
970 break;
971 /* Fall through. */
972
973 case R_390_PLT12DBL:
974 case R_390_PLT16DBL:
975 case R_390_PLT24DBL:
976 case R_390_PLT32:
977 case R_390_PLT32DBL:
978 case R_390_PLT64:
979 case R_390_PLTOFF16:
980 case R_390_PLTOFF32:
981 case R_390_PLTOFF64:
982 /* This symbol requires a procedure linkage table entry. We
983 actually build the entry in adjust_dynamic_symbol,
984 because this might be a case of linking PIC code which is
985 never referenced by a dynamic object, in which case we
986 don't need to generate a procedure linkage table entry
987 after all. */
988
989 /* If this is a local symbol, we resolve it directly without
990 creating a procedure linkage table entry. */
991 if (h != NULL)
992 {
993 h->needs_plt = 1;
994 h->plt.refcount += 1;
995 }
996 break;
997
998 case R_390_GOTPLT12:
999 case R_390_GOTPLT16:
1000 case R_390_GOTPLT20:
1001 case R_390_GOTPLT32:
1002 case R_390_GOTPLT64:
1003 case R_390_GOTPLTENT:
1004 /* This symbol requires either a procedure linkage table entry
1005 or an entry in the local got. We actually build the entry
1006 in adjust_dynamic_symbol because whether this is really a
1007 global reference can change and with it the fact if we have
1008 to create a plt entry or a local got entry. To be able to
1009 make a once global symbol a local one we have to keep track
1010 of the number of gotplt references that exist for this
1011 symbol. */
1012 if (h != NULL)
1013 {
1014 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1015 h->needs_plt = 1;
1016 h->plt.refcount += 1;
1017 }
1018 else
1019 local_got_refcounts[r_symndx] += 1;
1020 break;
1021
1022 case R_390_TLS_LDM64:
1023 htab->tls_ldm_got.refcount += 1;
1024 break;
1025
1026 case R_390_TLS_IE64:
1027 case R_390_TLS_GOTIE12:
1028 case R_390_TLS_GOTIE20:
1029 case R_390_TLS_GOTIE64:
1030 case R_390_TLS_IEENT:
1031 if (bfd_link_pic (info))
1032 info->flags |= DF_STATIC_TLS;
1033 /* Fall through */
1034
1035 case R_390_GOT12:
1036 case R_390_GOT16:
1037 case R_390_GOT20:
1038 case R_390_GOT32:
1039 case R_390_GOT64:
1040 case R_390_GOTENT:
1041 case R_390_TLS_GD64:
1042 /* This symbol requires a global offset table entry. */
1043 switch (r_type)
1044 {
1045 default:
1046 case R_390_GOT12:
1047 case R_390_GOT16:
1048 case R_390_GOT20:
1049 case R_390_GOT32:
1050 case R_390_GOTENT:
1051 tls_type = GOT_NORMAL;
1052 break;
1053 case R_390_TLS_GD64:
1054 tls_type = GOT_TLS_GD;
1055 break;
1056 case R_390_TLS_IE64:
1057 case R_390_TLS_GOTIE64:
1058 tls_type = GOT_TLS_IE;
1059 break;
1060 case R_390_TLS_GOTIE12:
1061 case R_390_TLS_GOTIE20:
1062 case R_390_TLS_IEENT:
1063 tls_type = GOT_TLS_IE_NLT;
1064 break;
1065 }
1066
1067 if (h != NULL)
1068 {
1069 h->got.refcount += 1;
1070 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1071 }
1072 else
1073 {
1074 local_got_refcounts[r_symndx] += 1;
1075 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1076 }
1077 /* If a TLS symbol is accessed using IE at least once,
1078 there is no point to use dynamic model for it. */
1079 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1080 {
1081 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1082 {
1083 _bfd_error_handler
1084 /* xgettext:c-format */
1085 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1086 abfd, h->root.root.string);
1087 return FALSE;
1088 }
1089 if (old_tls_type > tls_type)
1090 tls_type = old_tls_type;
1091 }
1092
1093 if (old_tls_type != tls_type)
1094 {
1095 if (h != NULL)
1096 elf_s390_hash_entry (h)->tls_type = tls_type;
1097 else
1098 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1099 }
1100
1101 if (r_type != R_390_TLS_IE64)
1102 break;
1103 /* Fall through */
1104
1105 case R_390_TLS_LE64:
1106 /* For static linking and executables this reloc will be
1107 calculated at linktime otherwise a TLS_TPOFF runtime
1108 reloc will be generated. */
1109 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1110 break;
1111
1112 if (!bfd_link_pic (info))
1113 break;
1114 info->flags |= DF_STATIC_TLS;
1115 /* Fall through */
1116
1117 case R_390_8:
1118 case R_390_16:
1119 case R_390_32:
1120 case R_390_64:
1121 case R_390_PC12DBL:
1122 case R_390_PC16:
1123 case R_390_PC16DBL:
1124 case R_390_PC24DBL:
1125 case R_390_PC32:
1126 case R_390_PC32DBL:
1127 case R_390_PC64:
1128 if (h != NULL && bfd_link_executable (info))
1129 {
1130 /* If this reloc is in a read-only section, we might
1131 need a copy reloc. We can't check reliably at this
1132 stage whether the section is read-only, as input
1133 sections have not yet been mapped to output sections.
1134 Tentatively set the flag for now, and correct in
1135 adjust_dynamic_symbol. */
1136 h->non_got_ref = 1;
1137
1138 if (!bfd_link_pic (info))
1139 {
1140 /* We may need a .plt entry if the function this reloc
1141 refers to is in a shared lib. */
1142 h->plt.refcount += 1;
1143 }
1144 }
1145
1146 /* If we are creating a shared library, and this is a reloc
1147 against a global symbol, or a non PC relative reloc
1148 against a local symbol, then we need to copy the reloc
1149 into the shared library. However, if we are linking with
1150 -Bsymbolic, we do not need to copy a reloc against a
1151 global symbol which is defined in an object we are
1152 including in the link (i.e., DEF_REGULAR is set). At
1153 this point we have not seen all the input files, so it is
1154 possible that DEF_REGULAR is not set now but will be set
1155 later (it is never cleared). In case of a weak definition,
1156 DEF_REGULAR may be cleared later by a strong definition in
1157 a shared library. We account for that possibility below by
1158 storing information in the relocs_copied field of the hash
1159 table entry. A similar situation occurs when creating
1160 shared libraries and symbol visibility changes render the
1161 symbol local.
1162
1163 If on the other hand, we are creating an executable, we
1164 may need to keep relocations for symbols satisfied by a
1165 dynamic library if we manage to avoid copy relocs for the
1166 symbol. */
1167 if ((bfd_link_pic (info)
1168 && (sec->flags & SEC_ALLOC) != 0
1169 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1170 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1171 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1172 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1173 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1174 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1175 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1176 || (h != NULL
1177 && (! SYMBOLIC_BIND (info, h)
1178 || h->root.type == bfd_link_hash_defweak
1179 || !h->def_regular))))
1180 || (ELIMINATE_COPY_RELOCS
1181 && !bfd_link_pic (info)
1182 && (sec->flags & SEC_ALLOC) != 0
1183 && h != NULL
1184 && (h->root.type == bfd_link_hash_defweak
1185 || !h->def_regular)))
1186 {
1187 struct elf_dyn_relocs *p;
1188 struct elf_dyn_relocs **head;
1189
1190 /* We must copy these reloc types into the output file.
1191 Create a reloc section in dynobj and make room for
1192 this reloc. */
1193 if (sreloc == NULL)
1194 {
1195 if (htab->elf.dynobj == NULL)
1196 htab->elf.dynobj = abfd;
1197
1198 sreloc = _bfd_elf_make_dynamic_reloc_section
1199 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1200
1201 if (sreloc == NULL)
1202 return FALSE;
1203 }
1204
1205 /* If this is a global symbol, we count the number of
1206 relocations we need for this symbol. */
1207 if (h != NULL)
1208 {
1209 head = &h->dyn_relocs;
1210 }
1211 else
1212 {
1213 /* Track dynamic relocs needed for local syms too.
1214 We really need local syms available to do this
1215 easily. Oh well. */
1216 asection *s;
1217 void *vpp;
1218
1219 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1220 abfd, r_symndx);
1221 if (isym == NULL)
1222 return FALSE;
1223
1224 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1225 if (s == NULL)
1226 s = sec;
1227
1228 vpp = &elf_section_data (s)->local_dynrel;
1229 head = (struct elf_dyn_relocs **) vpp;
1230 }
1231
1232 p = *head;
1233 if (p == NULL || p->sec != sec)
1234 {
1235 size_t amt = sizeof *p;
1236 p = ((struct elf_dyn_relocs *)
1237 bfd_alloc (htab->elf.dynobj, amt));
1238 if (p == NULL)
1239 return FALSE;
1240 p->next = *head;
1241 *head = p;
1242 p->sec = sec;
1243 p->count = 0;
1244 p->pc_count = 0;
1245 }
1246
1247 p->count += 1;
1248 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1249 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1250 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1251 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1252 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1253 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1254 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1255 p->pc_count += 1;
1256 }
1257 break;
1258
1259 /* This relocation describes the C++ object vtable hierarchy.
1260 Reconstruct it for later use during GC. */
1261 case R_390_GNU_VTINHERIT:
1262 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1263 return FALSE;
1264 break;
1265
1266 /* This relocation describes which C++ vtable entries are actually
1267 used. Record for later use during GC. */
1268 case R_390_GNU_VTENTRY:
1269 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1270 return FALSE;
1271 break;
1272
1273 default:
1274 break;
1275 }
1276 }
1277
1278 return TRUE;
1279 }
1280
1281 /* Return the section that should be marked against GC for a given
1282 relocation. */
1283
1284 static asection *
1285 elf_s390_gc_mark_hook (asection *sec,
1286 struct bfd_link_info *info,
1287 Elf_Internal_Rela *rel,
1288 struct elf_link_hash_entry *h,
1289 Elf_Internal_Sym *sym)
1290 {
1291 if (h != NULL)
1292 switch (ELF64_R_TYPE (rel->r_info))
1293 {
1294 case R_390_GNU_VTINHERIT:
1295 case R_390_GNU_VTENTRY:
1296 return NULL;
1297 }
1298
1299 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1300 }
1301
1302 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1303 entry but we found we will not create any. Called when we find we will
1304 not have any PLT for this symbol, by for example
1305 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1306 or elf_s390_size_dynamic_sections if no dynamic sections will be
1307 created (we're only linking static objects). */
1308
1309 static void
1310 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1311 {
1312 if (h->elf.root.type == bfd_link_hash_warning)
1313 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1314
1315 if (h->gotplt_refcount <= 0)
1316 return;
1317
1318 /* We simply add the number of gotplt references to the number
1319 * of got references for this symbol. */
1320 h->elf.got.refcount += h->gotplt_refcount;
1321 h->gotplt_refcount = -1;
1322 }
1323
1324 /* Adjust a symbol defined by a dynamic object and referenced by a
1325 regular object. The current definition is in some section of the
1326 dynamic object, but we're not including those sections. We have to
1327 change the definition to something the rest of the link can
1328 understand. */
1329
1330 static bfd_boolean
1331 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1332 struct elf_link_hash_entry *h)
1333 {
1334 struct elf_s390_link_hash_table *htab;
1335 asection *s, *srel;
1336
1337 /* STT_GNU_IFUNC symbol must go through PLT. */
1338 if (s390_is_ifunc_symbol_p (h))
1339 {
1340 /* All local STT_GNU_IFUNC references must be treated as local
1341 calls via local PLT. */
1342 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1343 {
1344 bfd_size_type pc_count = 0, count = 0;
1345 struct elf_dyn_relocs **pp;
1346 struct elf_dyn_relocs *p;
1347
1348 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1349 {
1350 pc_count += p->pc_count;
1351 p->count -= p->pc_count;
1352 p->pc_count = 0;
1353 count += p->count;
1354 if (p->count == 0)
1355 *pp = p->next;
1356 else
1357 pp = &p->next;
1358 }
1359
1360 if (pc_count || count)
1361 {
1362 h->needs_plt = 1;
1363 h->non_got_ref = 1;
1364 if (h->plt.refcount <= 0)
1365 h->plt.refcount = 1;
1366 else
1367 h->plt.refcount += 1;
1368 }
1369 }
1370
1371 if (h->plt.refcount <= 0)
1372 {
1373 h->plt.offset = (bfd_vma) -1;
1374 h->needs_plt = 0;
1375 }
1376 return TRUE;
1377 }
1378
1379 /* If this is a function, put it in the procedure linkage table. We
1380 will fill in the contents of the procedure linkage table later
1381 (although we could actually do it here). */
1382 if (h->type == STT_FUNC
1383 || h->needs_plt)
1384 {
1385 if (h->plt.refcount <= 0
1386 || SYMBOL_CALLS_LOCAL (info, h)
1387 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1388 {
1389 /* This case can occur if we saw a PLT32 reloc in an input
1390 file, but the symbol was never referred to by a dynamic
1391 object, or if all references were garbage collected. In
1392 such a case, we don't actually need to build a procedure
1393 linkage table, and we can just do a PC32 reloc instead. */
1394 h->plt.offset = (bfd_vma) -1;
1395 h->needs_plt = 0;
1396 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1397 }
1398
1399 return TRUE;
1400 }
1401 else
1402 /* It's possible that we incorrectly decided a .plt reloc was
1403 needed for an R_390_PC32 reloc to a non-function sym in
1404 check_relocs. We can't decide accurately between function and
1405 non-function syms in check-relocs; Objects loaded later in
1406 the link may change h->type. So fix it now. */
1407 h->plt.offset = (bfd_vma) -1;
1408
1409 /* If this is a weak symbol, and there is a real definition, the
1410 processor independent code will have arranged for us to see the
1411 real definition first, and we can just use the same value. */
1412 if (h->is_weakalias)
1413 {
1414 struct elf_link_hash_entry *def = weakdef (h);
1415 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1416 h->root.u.def.section = def->root.u.def.section;
1417 h->root.u.def.value = def->root.u.def.value;
1418 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1419 h->non_got_ref = def->non_got_ref;
1420 return TRUE;
1421 }
1422
1423 /* This is a reference to a symbol defined by a dynamic object which
1424 is not a function. */
1425
1426 /* If we are creating a shared library, we must presume that the
1427 only references to the symbol are via the global offset table.
1428 For such cases we need not do anything here; the relocations will
1429 be handled correctly by relocate_section. */
1430 if (bfd_link_pic (info))
1431 return TRUE;
1432
1433 /* If there are no references to this symbol that do not use the
1434 GOT, we don't need to generate a copy reloc. */
1435 if (!h->non_got_ref)
1436 return TRUE;
1437
1438 /* If -z nocopyreloc was given, we won't generate them either. */
1439 if (info->nocopyreloc)
1440 {
1441 h->non_got_ref = 0;
1442 return TRUE;
1443 }
1444
1445 /* If we don't find any dynamic relocs in read-only sections, then
1446 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1447 if (ELIMINATE_COPY_RELOCS && !_bfd_elf_readonly_dynrelocs (h))
1448 {
1449 h->non_got_ref = 0;
1450 return TRUE;
1451 }
1452
1453 /* We must allocate the symbol in our .dynbss section, which will
1454 become part of the .bss section of the executable. There will be
1455 an entry for this symbol in the .dynsym section. The dynamic
1456 object will contain position independent code, so all references
1457 from the dynamic object to this symbol will go through the global
1458 offset table. The dynamic linker will use the .dynsym entry to
1459 determine the address it must put in the global offset table, so
1460 both the dynamic object and the regular object will refer to the
1461 same memory location for the variable. */
1462
1463 htab = elf_s390_hash_table (info);
1464 if (htab == NULL)
1465 return FALSE;
1466
1467 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1468 copy the initial value out of the dynamic object and into the
1469 runtime process image. */
1470 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1471 {
1472 s = htab->elf.sdynrelro;
1473 srel = htab->elf.sreldynrelro;
1474 }
1475 else
1476 {
1477 s = htab->elf.sdynbss;
1478 srel = htab->elf.srelbss;
1479 }
1480 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1481 {
1482 srel->size += sizeof (Elf64_External_Rela);
1483 h->needs_copy = 1;
1484 }
1485
1486 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1487 }
1488
1489 /* Allocate space in .plt, .got and associated reloc sections for
1490 dynamic relocs. */
1491
1492 static bfd_boolean
1493 allocate_dynrelocs (struct elf_link_hash_entry *h,
1494 void * inf)
1495 {
1496 struct bfd_link_info *info;
1497 struct elf_s390_link_hash_table *htab;
1498 struct elf_dyn_relocs *p;
1499
1500 if (h->root.type == bfd_link_hash_indirect)
1501 return TRUE;
1502
1503 info = (struct bfd_link_info *) inf;
1504 htab = elf_s390_hash_table (info);
1505 if (htab == NULL)
1506 return FALSE;
1507
1508 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1509 here if it is defined and referenced in a non-shared object. */
1510 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1511 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1512 else if (htab->elf.dynamic_sections_created
1513 && h->plt.refcount > 0)
1514 {
1515 /* Make sure this symbol is output as a dynamic symbol.
1516 Undefined weak syms won't yet be marked as dynamic. */
1517 if (h->dynindx == -1
1518 && !h->forced_local)
1519 {
1520 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1521 return FALSE;
1522 }
1523
1524 if (bfd_link_pic (info)
1525 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1526 {
1527 asection *s = htab->elf.splt;
1528
1529 /* If this is the first .plt entry, make room for the special
1530 first entry. */
1531 if (s->size == 0)
1532 s->size += PLT_FIRST_ENTRY_SIZE;
1533
1534 h->plt.offset = s->size;
1535
1536 /* If this symbol is not defined in a regular file, and we are
1537 not generating a shared library, then set the symbol to this
1538 location in the .plt. This is required to make function
1539 pointers compare as equal between the normal executable and
1540 the shared library. */
1541 if (! bfd_link_pic (info)
1542 && !h->def_regular)
1543 {
1544 h->root.u.def.section = s;
1545 h->root.u.def.value = h->plt.offset;
1546 }
1547
1548 /* Make room for this entry. */
1549 s->size += PLT_ENTRY_SIZE;
1550
1551 /* We also need to make an entry in the .got.plt section. */
1552 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1553
1554 /* We also need to make an entry in the .rela.plt section. */
1555 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1556 }
1557 else
1558 {
1559 h->plt.offset = (bfd_vma) -1;
1560 h->needs_plt = 0;
1561 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1562 }
1563 }
1564 else
1565 {
1566 h->plt.offset = (bfd_vma) -1;
1567 h->needs_plt = 0;
1568 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1569 }
1570
1571 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1572 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1573 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1574 we can save the dynamic TLS relocation. */
1575 if (h->got.refcount > 0
1576 && !bfd_link_pic (info)
1577 && h->dynindx == -1
1578 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1579 {
1580 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1581 /* For the GOTIE access without a literal pool entry the offset has
1582 to be stored somewhere. The immediate value in the instruction
1583 is not bit enough so the value is stored in the got. */
1584 {
1585 h->got.offset = htab->elf.sgot->size;
1586 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1587 }
1588 else
1589 h->got.offset = (bfd_vma) -1;
1590 }
1591 else if (h->got.refcount > 0)
1592 {
1593 asection *s;
1594 bfd_boolean dyn;
1595 int tls_type = elf_s390_hash_entry(h)->tls_type;
1596
1597 /* Make sure this symbol is output as a dynamic symbol.
1598 Undefined weak syms won't yet be marked as dynamic. */
1599 if (h->dynindx == -1
1600 && !h->forced_local)
1601 {
1602 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1603 return FALSE;
1604 }
1605
1606 s = htab->elf.sgot;
1607 h->got.offset = s->size;
1608 s->size += GOT_ENTRY_SIZE;
1609 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1610 if (tls_type == GOT_TLS_GD)
1611 s->size += GOT_ENTRY_SIZE;
1612 dyn = htab->elf.dynamic_sections_created;
1613 /* R_390_TLS_IE64 needs one dynamic relocation,
1614 R_390_TLS_GD64 needs one if local symbol and two if global. */
1615 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1616 || tls_type >= GOT_TLS_IE)
1617 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1618 else if (tls_type == GOT_TLS_GD)
1619 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1620 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1621 && (bfd_link_pic (info)
1622 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1623 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1624 }
1625 else
1626 h->got.offset = (bfd_vma) -1;
1627
1628 if (h->dyn_relocs == NULL)
1629 return TRUE;
1630
1631 /* In the shared -Bsymbolic case, discard space allocated for
1632 dynamic pc-relative relocs against symbols which turn out to be
1633 defined in regular objects. For the normal shared case, discard
1634 space for pc-relative relocs that have become local due to symbol
1635 visibility changes. */
1636
1637 if (bfd_link_pic (info))
1638 {
1639 if (SYMBOL_CALLS_LOCAL (info, h))
1640 {
1641 struct elf_dyn_relocs **pp;
1642
1643 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1644 {
1645 p->count -= p->pc_count;
1646 p->pc_count = 0;
1647 if (p->count == 0)
1648 *pp = p->next;
1649 else
1650 pp = &p->next;
1651 }
1652 }
1653
1654 /* Also discard relocs on undefined weak syms with non-default
1655 visibility. */
1656 if (h->dyn_relocs != NULL
1657 && h->root.type == bfd_link_hash_undefweak)
1658 {
1659 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1660 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1661 h->dyn_relocs = NULL;
1662
1663 /* Make sure undefined weak symbols are output as a dynamic
1664 symbol in PIEs. */
1665 else if (h->dynindx == -1
1666 && !h->forced_local)
1667 {
1668 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1669 return FALSE;
1670 }
1671 }
1672 }
1673 else if (ELIMINATE_COPY_RELOCS)
1674 {
1675 /* For the non-shared case, discard space for relocs against
1676 symbols which turn out to need copy relocs or are not
1677 dynamic. */
1678
1679 if (!h->non_got_ref
1680 && ((h->def_dynamic
1681 && !h->def_regular)
1682 || (htab->elf.dynamic_sections_created
1683 && (h->root.type == bfd_link_hash_undefweak
1684 || h->root.type == bfd_link_hash_undefined))))
1685 {
1686 /* Make sure this symbol is output as a dynamic symbol.
1687 Undefined weak syms won't yet be marked as dynamic. */
1688 if (h->dynindx == -1
1689 && !h->forced_local)
1690 {
1691 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1692 return FALSE;
1693 }
1694
1695 /* If that succeeded, we know we'll be keeping all the
1696 relocs. */
1697 if (h->dynindx != -1)
1698 goto keep;
1699 }
1700
1701 h->dyn_relocs = NULL;
1702
1703 keep: ;
1704 }
1705
1706 /* Finally, allocate space. */
1707 for (p = h->dyn_relocs; p != NULL; p = p->next)
1708 {
1709 asection *sreloc = elf_section_data (p->sec)->sreloc;
1710 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1711 }
1712
1713 return TRUE;
1714 }
1715
1716 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1717 read-only sections. */
1718
1719 static bfd_boolean
1720 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1721 {
1722 asection *sec;
1723
1724 if (h->root.type == bfd_link_hash_indirect)
1725 return TRUE;
1726
1727 sec = _bfd_elf_readonly_dynrelocs (h);
1728 if (sec != NULL)
1729 {
1730 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1731
1732 info->flags |= DF_TEXTREL;
1733 info->callbacks->minfo
1734 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1735 sec->owner, h->root.root.string, sec);
1736
1737 /* Not an error, just cut short the traversal. */
1738 return FALSE;
1739 }
1740 return TRUE;
1741 }
1742
1743 /* Set the sizes of the dynamic sections. */
1744
1745 static bfd_boolean
1746 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1747 struct bfd_link_info *info)
1748 {
1749 struct elf_s390_link_hash_table *htab;
1750 bfd *dynobj;
1751 asection *s;
1752 bfd_boolean relocs;
1753 bfd *ibfd;
1754
1755 htab = elf_s390_hash_table (info);
1756 if (htab == NULL)
1757 return FALSE;
1758
1759 dynobj = htab->elf.dynobj;
1760 if (dynobj == NULL)
1761 abort ();
1762
1763 if (htab->elf.dynamic_sections_created)
1764 {
1765 /* Set the contents of the .interp section to the interpreter. */
1766 if (bfd_link_executable (info) && !info->nointerp)
1767 {
1768 s = bfd_get_linker_section (dynobj, ".interp");
1769 if (s == NULL)
1770 abort ();
1771 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1772 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1773 }
1774 }
1775
1776 if (htab->elf.sgot && s390_gotplt_after_got_p (info))
1777 {
1778 /* _bfd_elf_create_got_section adds the got header size always
1779 to .got.plt but we need it in .got if this section comes
1780 first. */
1781 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
1782 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
1783
1784 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1785 instead of .got.plt. */
1786 htab->elf.hgot->root.u.def.section = htab->elf.sgot;
1787 htab->elf.hgot->root.u.def.value = 0;
1788 }
1789
1790 /* Set up .got offsets for local syms, and space for local dynamic
1791 relocs. */
1792 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1793 {
1794 bfd_signed_vma *local_got;
1795 bfd_signed_vma *end_local_got;
1796 char *local_tls_type;
1797 bfd_size_type locsymcount;
1798 Elf_Internal_Shdr *symtab_hdr;
1799 asection *srela;
1800 struct plt_entry *local_plt;
1801 unsigned int i;
1802
1803 if (! is_s390_elf (ibfd))
1804 continue;
1805
1806 for (s = ibfd->sections; s != NULL; s = s->next)
1807 {
1808 struct elf_dyn_relocs *p;
1809
1810 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1811 {
1812 if (!bfd_is_abs_section (p->sec)
1813 && bfd_is_abs_section (p->sec->output_section))
1814 {
1815 /* Input section has been discarded, either because
1816 it is a copy of a linkonce section or due to
1817 linker script /DISCARD/, so we'll be discarding
1818 the relocs too. */
1819 }
1820 else if (p->count != 0)
1821 {
1822 srela = elf_section_data (p->sec)->sreloc;
1823 srela->size += p->count * sizeof (Elf64_External_Rela);
1824 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1825 info->flags |= DF_TEXTREL;
1826 }
1827 }
1828 }
1829
1830 local_got = elf_local_got_refcounts (ibfd);
1831 if (!local_got)
1832 continue;
1833
1834 symtab_hdr = &elf_symtab_hdr (ibfd);
1835 locsymcount = symtab_hdr->sh_info;
1836 end_local_got = local_got + locsymcount;
1837 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1838 s = htab->elf.sgot;
1839 srela = htab->elf.srelgot;
1840 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1841 {
1842 if (*local_got > 0)
1843 {
1844 *local_got = s->size;
1845 s->size += GOT_ENTRY_SIZE;
1846 if (*local_tls_type == GOT_TLS_GD)
1847 s->size += GOT_ENTRY_SIZE;
1848 if (bfd_link_pic (info))
1849 srela->size += sizeof (Elf64_External_Rela);
1850 }
1851 else
1852 *local_got = (bfd_vma) -1;
1853 }
1854
1855 local_plt = elf_s390_local_plt (ibfd);
1856 for (i = 0; i < symtab_hdr->sh_info; i++)
1857 {
1858 if (local_plt[i].plt.refcount > 0)
1859 {
1860 local_plt[i].plt.offset = htab->elf.iplt->size;
1861 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1862 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1863 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1864 }
1865 else
1866 local_plt[i].plt.offset = (bfd_vma) -1;
1867 }
1868 }
1869
1870 if (htab->tls_ldm_got.refcount > 0)
1871 {
1872 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1873 relocs. */
1874 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1875 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1876 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1877 }
1878 else
1879 htab->tls_ldm_got.offset = -1;
1880
1881 /* Allocate global sym .plt and .got entries, and space for global
1882 sym dynamic relocs. */
1883 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1884
1885 /* We now have determined the sizes of the various dynamic sections.
1886 Allocate memory for them. */
1887 relocs = FALSE;
1888 for (s = dynobj->sections; s != NULL; s = s->next)
1889 {
1890 if ((s->flags & SEC_LINKER_CREATED) == 0)
1891 continue;
1892
1893 if (s == htab->elf.splt
1894 || s == htab->elf.sgot
1895 || s == htab->elf.sgotplt
1896 || s == htab->elf.sdynbss
1897 || s == htab->elf.sdynrelro
1898 || s == htab->elf.iplt
1899 || s == htab->elf.igotplt
1900 || s == htab->irelifunc)
1901 {
1902 /* Strip this section if we don't need it; see the
1903 comment below. */
1904 }
1905 else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
1906 {
1907 if (s->size != 0 && s != htab->elf.srelplt)
1908 relocs = TRUE;
1909
1910 /* We use the reloc_count field as a counter if we need
1911 to copy relocs into the output file. */
1912 s->reloc_count = 0;
1913 }
1914 else
1915 {
1916 /* It's not one of our sections, so don't allocate space. */
1917 continue;
1918 }
1919
1920 if (s->size == 0)
1921 {
1922 /* If we don't need this section, strip it from the
1923 output file. This is to handle .rela.bss and
1924 .rela.plt. We must create it in
1925 create_dynamic_sections, because it must be created
1926 before the linker maps input sections to output
1927 sections. The linker does that before
1928 adjust_dynamic_symbol is called, and it is that
1929 function which decides whether anything needs to go
1930 into these sections. */
1931
1932 s->flags |= SEC_EXCLUDE;
1933 continue;
1934 }
1935
1936 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1937 continue;
1938
1939 /* Allocate memory for the section contents. We use bfd_zalloc
1940 here in case unused entries are not reclaimed before the
1941 section's contents are written out. This should not happen,
1942 but this way if it does, we get a R_390_NONE reloc instead
1943 of garbage. */
1944 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1945 if (s->contents == NULL)
1946 return FALSE;
1947 }
1948
1949 if (htab->elf.dynamic_sections_created)
1950 {
1951 /* Add some entries to the .dynamic section. We fill in the
1952 values later, in elf_s390_finish_dynamic_sections, but we
1953 must add the entries now so that we get the correct size for
1954 the .dynamic section. The DT_DEBUG entry is filled in by the
1955 dynamic linker and used by the debugger. */
1956 #define add_dynamic_entry(TAG, VAL) \
1957 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1958
1959 if (bfd_link_executable (info))
1960 {
1961 if (!add_dynamic_entry (DT_DEBUG, 0))
1962 return FALSE;
1963 }
1964
1965 if (htab->elf.splt->size != 0)
1966 {
1967 if (!add_dynamic_entry (DT_PLTGOT, 0)
1968 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1969 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1970 || !add_dynamic_entry (DT_JMPREL, 0))
1971 return FALSE;
1972 }
1973
1974 if (relocs)
1975 {
1976 if (!add_dynamic_entry (DT_RELA, 0)
1977 || !add_dynamic_entry (DT_RELASZ, 0)
1978 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
1979 return FALSE;
1980
1981 /* If any dynamic relocs apply to a read-only section,
1982 then we need a DT_TEXTREL entry. */
1983 if ((info->flags & DF_TEXTREL) == 0)
1984 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
1985
1986 if ((info->flags & DF_TEXTREL) != 0)
1987 {
1988 if (!add_dynamic_entry (DT_TEXTREL, 0))
1989 return FALSE;
1990 }
1991 }
1992 }
1993 #undef add_dynamic_entry
1994
1995 return TRUE;
1996 }
1997
1998 /* Return the base VMA address which should be subtracted from real addresses
1999 when resolving @dtpoff relocation.
2000 This is PT_TLS segment p_vaddr. */
2001
2002 static bfd_vma
2003 dtpoff_base (struct bfd_link_info *info)
2004 {
2005 /* If tls_sec is NULL, we should have signalled an error already. */
2006 if (elf_hash_table (info)->tls_sec == NULL)
2007 return 0;
2008 return elf_hash_table (info)->tls_sec->vma;
2009 }
2010
2011 /* Return the relocation value for @tpoff relocation
2012 if STT_TLS virtual address is ADDRESS. */
2013
2014 static bfd_vma
2015 tpoff (struct bfd_link_info *info, bfd_vma address)
2016 {
2017 struct elf_link_hash_table *htab = elf_hash_table (info);
2018
2019 /* If tls_sec is NULL, we should have signalled an error already. */
2020 if (htab->tls_sec == NULL)
2021 return 0;
2022 return htab->tls_size + htab->tls_sec->vma - address;
2023 }
2024
2025 /* Complain if TLS instruction relocation is against an invalid
2026 instruction. */
2027
2028 static void
2029 invalid_tls_insn (bfd *input_bfd,
2030 asection *input_section,
2031 Elf_Internal_Rela *rel)
2032 {
2033 reloc_howto_type *howto;
2034
2035 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2036 _bfd_error_handler
2037 /* xgettext:c-format */
2038 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2039 input_bfd,
2040 input_section,
2041 (uint64_t) rel->r_offset,
2042 howto->name);
2043 bfd_set_error (bfd_error_bad_value);
2044 }
2045
2046 /* Relocate a 390 ELF section. */
2047
2048 static bfd_boolean
2049 elf_s390_relocate_section (bfd *output_bfd,
2050 struct bfd_link_info *info,
2051 bfd *input_bfd,
2052 asection *input_section,
2053 bfd_byte *contents,
2054 Elf_Internal_Rela *relocs,
2055 Elf_Internal_Sym *local_syms,
2056 asection **local_sections)
2057 {
2058 struct elf_s390_link_hash_table *htab;
2059 Elf_Internal_Shdr *symtab_hdr;
2060 struct elf_link_hash_entry **sym_hashes;
2061 bfd_vma *local_got_offsets;
2062 Elf_Internal_Rela *rel;
2063 Elf_Internal_Rela *relend;
2064
2065 if (!is_s390_elf (input_bfd))
2066 {
2067 bfd_set_error (bfd_error_wrong_format);
2068 return FALSE;
2069 }
2070
2071 htab = elf_s390_hash_table (info);
2072 if (htab == NULL)
2073 return FALSE;
2074
2075 symtab_hdr = &elf_symtab_hdr (input_bfd);
2076 sym_hashes = elf_sym_hashes (input_bfd);
2077 local_got_offsets = elf_local_got_offsets (input_bfd);
2078
2079 rel = relocs;
2080 relend = relocs + input_section->reloc_count;
2081 for (; rel < relend; rel++)
2082 {
2083 unsigned int r_type;
2084 reloc_howto_type *howto;
2085 unsigned long r_symndx;
2086 struct elf_link_hash_entry *h;
2087 Elf_Internal_Sym *sym;
2088 asection *sec;
2089 bfd_vma off;
2090 bfd_vma relocation;
2091 bfd_boolean unresolved_reloc;
2092 bfd_reloc_status_type r;
2093 int tls_type;
2094 bfd_boolean resolved_to_zero;
2095
2096 r_type = ELF64_R_TYPE (rel->r_info);
2097 if (r_type == (int) R_390_GNU_VTINHERIT
2098 || r_type == (int) R_390_GNU_VTENTRY)
2099 continue;
2100 if (r_type >= (int) R_390_max)
2101 {
2102 bfd_set_error (bfd_error_bad_value);
2103 return FALSE;
2104 }
2105
2106 howto = elf_howto_table + r_type;
2107 r_symndx = ELF64_R_SYM (rel->r_info);
2108
2109 h = NULL;
2110 sym = NULL;
2111 sec = NULL;
2112 unresolved_reloc = FALSE;
2113 if (r_symndx < symtab_hdr->sh_info)
2114 {
2115 sym = local_syms + r_symndx;
2116 sec = local_sections[r_symndx];
2117
2118 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2119 {
2120 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2121 if (local_plt == NULL)
2122 return FALSE;
2123
2124 /* Address of the PLT slot. */
2125 relocation = (htab->elf.iplt->output_section->vma
2126 + htab->elf.iplt->output_offset
2127 + local_plt[r_symndx].plt.offset);
2128
2129 switch (r_type)
2130 {
2131 case R_390_PLTOFF16:
2132 case R_390_PLTOFF32:
2133 case R_390_PLTOFF64:
2134 relocation -= s390_got_pointer (info);
2135 break;
2136 case R_390_GOTPLT12:
2137 case R_390_GOTPLT16:
2138 case R_390_GOTPLT20:
2139 case R_390_GOTPLT32:
2140 case R_390_GOTPLT64:
2141 case R_390_GOTPLTENT:
2142 case R_390_GOT12:
2143 case R_390_GOT16:
2144 case R_390_GOT20:
2145 case R_390_GOT32:
2146 case R_390_GOT64:
2147 case R_390_GOTENT:
2148 {
2149 /* Write the PLT slot address into the GOT slot. */
2150 bfd_put_64 (output_bfd, relocation,
2151 htab->elf.sgot->contents +
2152 local_got_offsets[r_symndx]);
2153 relocation = (local_got_offsets[r_symndx] +
2154 s390_got_offset (info));
2155
2156 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2157 relocation += s390_got_pointer (info);
2158 break;
2159 }
2160 default:
2161 break;
2162 }
2163 /* The output section is needed later in
2164 finish_dynamic_section when creating the dynamic
2165 relocation. */
2166 local_plt[r_symndx].sec = sec;
2167 goto do_relocation;
2168 }
2169 else
2170 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2171 }
2172 else
2173 {
2174 bfd_boolean warned ATTRIBUTE_UNUSED;
2175 bfd_boolean ignored ATTRIBUTE_UNUSED;
2176
2177 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2178 r_symndx, symtab_hdr, sym_hashes,
2179 h, sec, relocation,
2180 unresolved_reloc, warned, ignored);
2181 }
2182
2183 if (sec != NULL && discarded_section (sec))
2184 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2185 rel, 1, relend, howto, 0, contents);
2186
2187 if (bfd_link_relocatable (info))
2188 continue;
2189
2190 resolved_to_zero = (h != NULL
2191 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2192
2193 switch (r_type)
2194 {
2195 case R_390_GOTPLT12:
2196 case R_390_GOTPLT16:
2197 case R_390_GOTPLT20:
2198 case R_390_GOTPLT32:
2199 case R_390_GOTPLT64:
2200 case R_390_GOTPLTENT:
2201 /* There are three cases for a GOTPLT relocation. 1) The
2202 relocation is against the jump slot entry of a plt that
2203 will get emitted to the output file. 2) The relocation
2204 is against the jump slot of a plt entry that has been
2205 removed. elf_s390_adjust_gotplt has created a GOT entry
2206 as replacement. 3) The relocation is against a local symbol.
2207 Cases 2) and 3) are the same as the GOT relocation code
2208 so we just have to test for case 1 and fall through for
2209 the other two. */
2210 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2211 {
2212 bfd_vma plt_index;
2213
2214 if (s390_is_ifunc_symbol_p (h))
2215 {
2216 /* Entry indices of .iplt and .igot.plt match
2217 1:1. No magic PLT first entry here. */
2218 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2219 relocation = (plt_index * GOT_ENTRY_SIZE
2220 + s390_gotplt_offset (info)
2221 + htab->elf.igotplt->output_offset);
2222 }
2223 else
2224 {
2225 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
2226 / PLT_ENTRY_SIZE);
2227
2228 relocation = (plt_index * GOT_ENTRY_SIZE
2229 + s390_gotplt_offset (info));
2230 }
2231 if (r_type == R_390_GOTPLTENT)
2232 relocation += s390_got_pointer (info);
2233 unresolved_reloc = FALSE;
2234 break;
2235 }
2236 /* Fall through. */
2237
2238 case R_390_GOT12:
2239 case R_390_GOT16:
2240 case R_390_GOT20:
2241 case R_390_GOT32:
2242 case R_390_GOT64:
2243 case R_390_GOTENT:
2244 /* Relocation is to the entry for this symbol in the global
2245 offset table. */
2246 if (htab->elf.sgot == NULL)
2247 abort ();
2248
2249 if (h != NULL)
2250 {
2251 bfd_boolean dyn;
2252
2253 off = h->got.offset;
2254 dyn = htab->elf.dynamic_sections_created;
2255
2256 if (s390_is_ifunc_symbol_p (h))
2257 {
2258 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2259 if (off == (bfd_vma)-1)
2260 {
2261 /* No explicit GOT usage so redirect to the
2262 got.iplt slot. */
2263 relocation = (s390_gotplt_offset (info)
2264 + htab->elf.igotplt->output_offset
2265 + (h->plt.offset / PLT_ENTRY_SIZE
2266 * GOT_ENTRY_SIZE));
2267
2268 /* For @GOTENT the relocation is against the offset between
2269 the instruction and the symbols entry in the GOT and not
2270 between the start of the GOT and the symbols entry. We
2271 add the vma of the GOT to get the correct value. */
2272 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2273 relocation += s390_got_pointer (info);
2274
2275 break;
2276 }
2277 else
2278 {
2279 /* Explicit GOT slots must contain the address
2280 of the PLT slot. This will be handled in
2281 finish_dynamic_symbol. */
2282 }
2283 }
2284 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2285 bfd_link_pic (info),
2286 h)
2287 || (bfd_link_pic (info)
2288 && SYMBOL_REFERENCES_LOCAL (info, h))
2289 || resolved_to_zero)
2290 {
2291 Elf_Internal_Sym *isym;
2292 asection *sym_sec;
2293
2294 /* This is actually a static link, or it is a
2295 -Bsymbolic link and the symbol is defined
2296 locally, or the symbol was forced to be local
2297 because of a version file. We must initialize
2298 this entry in the global offset table. Since the
2299 offset must always be a multiple of 2, we use the
2300 least significant bit to record whether we have
2301 initialized it already.
2302
2303 When doing a dynamic link, we create a .rel.got
2304 relocation entry to initialize the value. This
2305 is done in the finish_dynamic_symbol routine. */
2306 if ((off & 1) != 0)
2307 off &= ~1;
2308 else
2309 {
2310 bfd_put_64 (output_bfd, relocation,
2311 htab->elf.sgot->contents + off);
2312 h->got.offset |= 1;
2313 }
2314
2315 /* When turning a GOT slot dereference into a direct
2316 reference using larl we have to make sure that
2317 the symbol is 1. properly aligned and 2. it is no
2318 ABS symbol or will become one. */
2319 if ((h->def_regular
2320 && bfd_link_pic (info)
2321 && SYMBOL_REFERENCES_LOCAL (info, h))
2322 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2323 && ((r_type == R_390_GOTENT
2324 && (bfd_get_16 (input_bfd,
2325 contents + rel->r_offset - 2)
2326 & 0xff0f) == 0xc408)
2327 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2328 || (r_type == R_390_GOT20
2329 && (bfd_get_32 (input_bfd,
2330 contents + rel->r_offset - 2)
2331 & 0xff00f000) == 0xe300c000
2332 && bfd_get_8 (input_bfd,
2333 contents + rel->r_offset + 3) == 0x04))
2334 && (isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2335 input_bfd, r_symndx))
2336 && isym->st_shndx != SHN_ABS
2337 && h != htab->elf.hdynamic
2338 && h != htab->elf.hgot
2339 && h != htab->elf.hplt
2340 && !(isym->st_value & 1)
2341 && (sym_sec = bfd_section_from_elf_index (input_bfd,
2342 isym->st_shndx))
2343 && sym_sec->alignment_power)
2344 {
2345 unsigned short new_insn =
2346 (0xc000 | (bfd_get_8 (input_bfd,
2347 contents + rel->r_offset - 1) & 0xf0));
2348 bfd_put_16 (output_bfd, new_insn,
2349 contents + rel->r_offset - 2);
2350 r_type = R_390_PC32DBL;
2351 rel->r_addend = 2;
2352 howto = elf_howto_table + r_type;
2353 relocation = h->root.u.def.value
2354 + h->root.u.def.section->output_section->vma
2355 + h->root.u.def.section->output_offset;
2356 goto do_relocation;
2357 }
2358 }
2359 else
2360 unresolved_reloc = FALSE;
2361 }
2362 else
2363 {
2364 if (local_got_offsets == NULL)
2365 abort ();
2366
2367 off = local_got_offsets[r_symndx];
2368
2369 /* The offset must always be a multiple of 8. We use
2370 the least significant bit to record whether we have
2371 already generated the necessary reloc. */
2372 if ((off & 1) != 0)
2373 off &= ~1;
2374 else
2375 {
2376 bfd_put_64 (output_bfd, relocation,
2377 htab->elf.sgot->contents + off);
2378
2379 if (bfd_link_pic (info))
2380 {
2381 asection *s;
2382 Elf_Internal_Rela outrel;
2383 bfd_byte *loc;
2384
2385 s = htab->elf.srelgot;
2386 if (s == NULL)
2387 abort ();
2388
2389 outrel.r_offset = (htab->elf.sgot->output_section->vma
2390 + htab->elf.sgot->output_offset
2391 + off);
2392 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2393 outrel.r_addend = relocation;
2394 loc = s->contents;
2395 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2396 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2397 }
2398
2399 local_got_offsets[r_symndx] |= 1;
2400 }
2401 }
2402
2403 if (off >= (bfd_vma) -2)
2404 abort ();
2405
2406 relocation = s390_got_offset (info) + off;
2407
2408 /* For @GOTENT the relocation is against the offset between
2409 the instruction and the symbols entry in the GOT and not
2410 between the start of the GOT and the symbols entry. We
2411 add the vma of the GOT to get the correct value. */
2412 if ( r_type == R_390_GOTENT
2413 || r_type == R_390_GOTPLTENT)
2414 relocation += s390_got_pointer (info);
2415
2416 break;
2417
2418 case R_390_GOTOFF16:
2419 case R_390_GOTOFF32:
2420 case R_390_GOTOFF64:
2421 /* Relocation is relative to the start of the global offset
2422 table. */
2423
2424 if (h != NULL
2425 && s390_is_ifunc_symbol_p (h)
2426 && h->def_regular
2427 && !bfd_link_executable (info))
2428 {
2429 relocation = (htab->elf.iplt->output_section->vma
2430 + htab->elf.iplt->output_offset
2431 + h->plt.offset
2432 - s390_got_pointer (info));
2433 goto do_relocation;
2434 }
2435
2436 relocation -= s390_got_pointer (info);
2437 break;
2438
2439 case R_390_GOTPC:
2440 case R_390_GOTPCDBL:
2441 /* Use global offset table as symbol value. */
2442 relocation = s390_got_pointer (info);
2443 unresolved_reloc = FALSE;
2444 break;
2445
2446 case R_390_PLT12DBL:
2447 case R_390_PLT16DBL:
2448 case R_390_PLT24DBL:
2449 case R_390_PLT32:
2450 case R_390_PLT32DBL:
2451 case R_390_PLT64:
2452 /* Relocation is to the entry for this symbol in the
2453 procedure linkage table. */
2454
2455 /* Resolve a PLT32 reloc against a local symbol directly,
2456 without using the procedure linkage table. */
2457 if (h == NULL)
2458 break;
2459
2460 if (h->plt.offset == (bfd_vma) -1
2461 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2462 {
2463 /* We didn't make a PLT entry for this symbol. This
2464 happens when statically linking PIC code, or when
2465 using -Bsymbolic. */
2466 break;
2467 }
2468 if (s390_is_ifunc_symbol_p (h))
2469 relocation = (htab->elf.iplt->output_section->vma
2470 + htab->elf.iplt->output_offset
2471 + h->plt.offset);
2472 else
2473 relocation = (htab->elf.splt->output_section->vma
2474 + htab->elf.splt->output_offset
2475 + h->plt.offset);
2476 unresolved_reloc = FALSE;
2477 break;
2478
2479 case R_390_PLTOFF16:
2480 case R_390_PLTOFF32:
2481 case R_390_PLTOFF64:
2482 /* Relocation is to the entry for this symbol in the
2483 procedure linkage table relative to the start of the GOT. */
2484
2485 /* For local symbols or if we didn't make a PLT entry for
2486 this symbol resolve the symbol directly. */
2487 if (h == NULL
2488 || h->plt.offset == (bfd_vma) -1
2489 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2490 {
2491 relocation -= s390_got_pointer (info);
2492 break;
2493 }
2494
2495 if (s390_is_ifunc_symbol_p (h))
2496 relocation = (htab->elf.iplt->output_section->vma
2497 + htab->elf.iplt->output_offset
2498 + h->plt.offset
2499 - s390_got_pointer (info));
2500 else
2501 relocation = (htab->elf.splt->output_section->vma
2502 + htab->elf.splt->output_offset
2503 + h->plt.offset
2504 - s390_got_pointer (info));
2505 unresolved_reloc = FALSE;
2506 break;
2507
2508 case R_390_PC16:
2509 case R_390_PC12DBL:
2510 case R_390_PC16DBL:
2511 case R_390_PC24DBL:
2512 case R_390_PC32:
2513 case R_390_PC32DBL:
2514 case R_390_PC64:
2515 if (h != NULL
2516 && bfd_link_pie (info)
2517 && !h->def_regular)
2518 {
2519 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2520 "in shared library and accessed "
2521 "from executable "
2522 "(rebuild file with -fPIC ?)"),
2523 input_bfd, h->root.root.string);
2524 bfd_set_error (bfd_error_bad_value);
2525 return FALSE;
2526 }
2527 /* The target of these relocs are instruction operands
2528 residing in read-only sections. We cannot emit a runtime
2529 reloc for it. */
2530 if (h != NULL
2531 && s390_is_ifunc_symbol_p (h)
2532 && h->def_regular
2533 && bfd_link_pic (info))
2534 {
2535 relocation = (htab->elf.iplt->output_section->vma
2536 + htab->elf.iplt->output_offset
2537 + h->plt.offset);
2538 goto do_relocation;
2539 }
2540 /* Fall through. */
2541
2542 case R_390_8:
2543 case R_390_16:
2544 case R_390_32:
2545 case R_390_64:
2546
2547 if ((input_section->flags & SEC_ALLOC) == 0)
2548 break;
2549
2550 if (h != NULL
2551 && s390_is_ifunc_symbol_p (h)
2552 && h->def_regular)
2553 {
2554 if (!bfd_link_pic (info))
2555 {
2556 /* For a non-shared object the symbol will not
2557 change. Hence we can write the address of the
2558 target IPLT slot now. */
2559 relocation = (htab->elf.iplt->output_section->vma
2560 + htab->elf.iplt->output_offset
2561 + h ->plt.offset);
2562 goto do_relocation;
2563 }
2564 else
2565 {
2566 /* For shared objects a runtime relocation is needed. */
2567
2568 Elf_Internal_Rela outrel;
2569 asection *sreloc;
2570
2571 /* Need a dynamic relocation to get the real function
2572 address. */
2573 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2574 info,
2575 input_section,
2576 rel->r_offset);
2577 if (outrel.r_offset == (bfd_vma) -1
2578 || outrel.r_offset == (bfd_vma) -2)
2579 abort ();
2580
2581 outrel.r_offset += (input_section->output_section->vma
2582 + input_section->output_offset);
2583
2584 if (h->dynindx == -1
2585 || h->forced_local
2586 || bfd_link_executable (info))
2587 {
2588 /* This symbol is resolved locally. */
2589 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2590 outrel.r_addend = (h->root.u.def.value
2591 + h->root.u.def.section->output_section->vma
2592 + h->root.u.def.section->output_offset);
2593 }
2594 else
2595 {
2596 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2597 outrel.r_addend = 0;
2598 }
2599
2600 sreloc = htab->elf.irelifunc;
2601 elf_append_rela (output_bfd, sreloc, &outrel);
2602
2603 /* If this reloc is against an external symbol, we
2604 do not want to fiddle with the addend. Otherwise,
2605 we need to include the symbol value so that it
2606 becomes an addend for the dynamic reloc. For an
2607 internal symbol, we have updated addend. */
2608 continue;
2609 }
2610 }
2611
2612 if ((bfd_link_pic (info)
2613 && (h == NULL
2614 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2615 && !resolved_to_zero)
2616 || h->root.type != bfd_link_hash_undefweak)
2617 && ((r_type != R_390_PC16
2618 && r_type != R_390_PC12DBL
2619 && r_type != R_390_PC16DBL
2620 && r_type != R_390_PC24DBL
2621 && r_type != R_390_PC32
2622 && r_type != R_390_PC32DBL
2623 && r_type != R_390_PC64)
2624 || !SYMBOL_CALLS_LOCAL (info, h)))
2625 || (ELIMINATE_COPY_RELOCS
2626 && !bfd_link_pic (info)
2627 && h != NULL
2628 && h->dynindx != -1
2629 && !h->non_got_ref
2630 && ((h->def_dynamic
2631 && !h->def_regular)
2632 || h->root.type == bfd_link_hash_undefweak
2633 || h->root.type == bfd_link_hash_undefined)))
2634 {
2635 Elf_Internal_Rela outrel;
2636 bfd_boolean skip, relocate;
2637 asection *sreloc;
2638 bfd_byte *loc;
2639
2640 /* When generating a shared object, these relocations
2641 are copied into the output file to be resolved at run
2642 time. */
2643 skip = FALSE;
2644 relocate = FALSE;
2645
2646 outrel.r_offset =
2647 _bfd_elf_section_offset (output_bfd, info, input_section,
2648 rel->r_offset);
2649 if (outrel.r_offset == (bfd_vma) -1)
2650 skip = TRUE;
2651 else if (outrel.r_offset == (bfd_vma) -2)
2652 skip = TRUE, relocate = TRUE;
2653
2654 outrel.r_offset += (input_section->output_section->vma
2655 + input_section->output_offset);
2656
2657 if (skip)
2658 memset (&outrel, 0, sizeof outrel);
2659 else if (h != NULL
2660 && h->dynindx != -1
2661 && (r_type == R_390_PC16
2662 || r_type == R_390_PC12DBL
2663 || r_type == R_390_PC16DBL
2664 || r_type == R_390_PC24DBL
2665 || r_type == R_390_PC32
2666 || r_type == R_390_PC32DBL
2667 || r_type == R_390_PC64
2668 || !bfd_link_pic (info)
2669 || !SYMBOLIC_BIND (info, h)
2670 || !h->def_regular))
2671 {
2672 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2673 outrel.r_addend = rel->r_addend;
2674 }
2675 else
2676 {
2677 /* This symbol is local, or marked to become local. */
2678 outrel.r_addend = relocation + rel->r_addend;
2679 if (r_type == R_390_64)
2680 {
2681 relocate = TRUE;
2682 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2683 }
2684 else
2685 {
2686 long sindx;
2687
2688 if (bfd_is_abs_section (sec))
2689 sindx = 0;
2690 else if (sec == NULL || sec->owner == NULL)
2691 {
2692 bfd_set_error(bfd_error_bad_value);
2693 return FALSE;
2694 }
2695 else
2696 {
2697 asection *osec;
2698
2699 osec = sec->output_section;
2700 sindx = elf_section_data (osec)->dynindx;
2701
2702 if (sindx == 0)
2703 {
2704 osec = htab->elf.text_index_section;
2705 sindx = elf_section_data (osec)->dynindx;
2706 }
2707 BFD_ASSERT (sindx != 0);
2708
2709 /* We are turning this relocation into one
2710 against a section symbol, so subtract out
2711 the output section's address but not the
2712 offset of the input section in the output
2713 section. */
2714 outrel.r_addend -= osec->vma;
2715 }
2716 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2717 }
2718 }
2719
2720 sreloc = elf_section_data (input_section)->sreloc;
2721 if (sreloc == NULL)
2722 abort ();
2723
2724 loc = sreloc->contents;
2725 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2726 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2727
2728 /* If this reloc is against an external symbol, we do
2729 not want to fiddle with the addend. Otherwise, we
2730 need to include the symbol value so that it becomes
2731 an addend for the dynamic reloc. */
2732 if (! relocate)
2733 continue;
2734 }
2735
2736 break;
2737
2738 /* Relocations for tls literal pool entries. */
2739 case R_390_TLS_IE64:
2740 if (bfd_link_pic (info))
2741 {
2742 Elf_Internal_Rela outrel;
2743 asection *sreloc;
2744 bfd_byte *loc;
2745
2746 outrel.r_offset = rel->r_offset
2747 + input_section->output_section->vma
2748 + input_section->output_offset;
2749 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2750 sreloc = elf_section_data (input_section)->sreloc;
2751 if (sreloc == NULL)
2752 abort ();
2753 loc = sreloc->contents;
2754 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2755 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2756 }
2757 /* Fall through. */
2758
2759 case R_390_TLS_GD64:
2760 case R_390_TLS_GOTIE64:
2761 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2762 tls_type = GOT_UNKNOWN;
2763 if (h == NULL && local_got_offsets)
2764 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2765 else if (h != NULL)
2766 {
2767 tls_type = elf_s390_hash_entry(h)->tls_type;
2768 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2769 r_type = R_390_TLS_LE64;
2770 }
2771 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2772 r_type = R_390_TLS_IE64;
2773
2774 if (r_type == R_390_TLS_LE64)
2775 {
2776 /* This relocation gets optimized away by the local exec
2777 access optimization. */
2778 BFD_ASSERT (! unresolved_reloc);
2779 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2780 contents + rel->r_offset);
2781 continue;
2782 }
2783
2784 if (htab->elf.sgot == NULL)
2785 abort ();
2786
2787 if (h != NULL)
2788 off = h->got.offset;
2789 else
2790 {
2791 if (local_got_offsets == NULL)
2792 abort ();
2793
2794 off = local_got_offsets[r_symndx];
2795 }
2796
2797 emit_tls_relocs:
2798
2799 if ((off & 1) != 0)
2800 off &= ~1;
2801 else
2802 {
2803 Elf_Internal_Rela outrel;
2804 bfd_byte *loc;
2805 int dr_type, indx;
2806
2807 if (htab->elf.srelgot == NULL)
2808 abort ();
2809
2810 outrel.r_offset = (htab->elf.sgot->output_section->vma
2811 + htab->elf.sgot->output_offset + off);
2812
2813 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2814 if (r_type == R_390_TLS_GD64)
2815 dr_type = R_390_TLS_DTPMOD;
2816 else
2817 dr_type = R_390_TLS_TPOFF;
2818 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2819 outrel.r_addend = relocation - dtpoff_base (info);
2820 else
2821 outrel.r_addend = 0;
2822 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2823 loc = htab->elf.srelgot->contents;
2824 loc += htab->elf.srelgot->reloc_count++
2825 * sizeof (Elf64_External_Rela);
2826 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2827
2828 if (r_type == R_390_TLS_GD64)
2829 {
2830 if (indx == 0)
2831 {
2832 BFD_ASSERT (! unresolved_reloc);
2833 bfd_put_64 (output_bfd,
2834 relocation - dtpoff_base (info),
2835 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2836 }
2837 else
2838 {
2839 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2840 outrel.r_offset += GOT_ENTRY_SIZE;
2841 outrel.r_addend = 0;
2842 htab->elf.srelgot->reloc_count++;
2843 loc += sizeof (Elf64_External_Rela);
2844 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2845 }
2846 }
2847
2848 if (h != NULL)
2849 h->got.offset |= 1;
2850 else
2851 local_got_offsets[r_symndx] |= 1;
2852 }
2853
2854 if (off >= (bfd_vma) -2)
2855 abort ();
2856 if (r_type == ELF64_R_TYPE (rel->r_info))
2857 {
2858 relocation = htab->elf.sgot->output_offset + off;
2859 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2860 relocation += htab->elf.sgot->output_section->vma;
2861 unresolved_reloc = FALSE;
2862 }
2863 else
2864 {
2865 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2866 contents + rel->r_offset);
2867 continue;
2868 }
2869 break;
2870
2871 case R_390_TLS_GOTIE12:
2872 case R_390_TLS_GOTIE20:
2873 case R_390_TLS_IEENT:
2874 if (h == NULL)
2875 {
2876 if (local_got_offsets == NULL)
2877 abort();
2878 off = local_got_offsets[r_symndx];
2879 if (bfd_link_pic (info))
2880 goto emit_tls_relocs;
2881 }
2882 else
2883 {
2884 off = h->got.offset;
2885 tls_type = elf_s390_hash_entry(h)->tls_type;
2886 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2887 goto emit_tls_relocs;
2888 }
2889
2890 if (htab->elf.sgot == NULL)
2891 abort ();
2892
2893 BFD_ASSERT (! unresolved_reloc);
2894 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2895 htab->elf.sgot->contents + off);
2896 relocation = htab->elf.sgot->output_offset + off;
2897 if (r_type == R_390_TLS_IEENT)
2898 relocation += htab->elf.sgot->output_section->vma;
2899 unresolved_reloc = FALSE;
2900 break;
2901
2902 case R_390_TLS_LDM64:
2903 if (! bfd_link_pic (info))
2904 /* The literal pool entry this relocation refers to gets ignored
2905 by the optimized code of the local exec model. Do nothing
2906 and the value will turn out zero. */
2907 continue;
2908
2909 if (htab->elf.sgot == NULL)
2910 abort ();
2911
2912 off = htab->tls_ldm_got.offset;
2913 if (off & 1)
2914 off &= ~1;
2915 else
2916 {
2917 Elf_Internal_Rela outrel;
2918 bfd_byte *loc;
2919
2920 if (htab->elf.srelgot == NULL)
2921 abort ();
2922
2923 outrel.r_offset = (htab->elf.sgot->output_section->vma
2924 + htab->elf.sgot->output_offset + off);
2925
2926 bfd_put_64 (output_bfd, 0,
2927 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2928 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2929 outrel.r_addend = 0;
2930 loc = htab->elf.srelgot->contents;
2931 loc += htab->elf.srelgot->reloc_count++
2932 * sizeof (Elf64_External_Rela);
2933 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2934 htab->tls_ldm_got.offset |= 1;
2935 }
2936 relocation = htab->elf.sgot->output_offset + off;
2937 unresolved_reloc = FALSE;
2938 break;
2939
2940 case R_390_TLS_LE64:
2941 if (bfd_link_dll (info))
2942 {
2943 /* Linking a shared library with non-fpic code requires
2944 a R_390_TLS_TPOFF relocation. */
2945 Elf_Internal_Rela outrel;
2946 asection *sreloc;
2947 bfd_byte *loc;
2948 int indx;
2949
2950 outrel.r_offset = rel->r_offset
2951 + input_section->output_section->vma
2952 + input_section->output_offset;
2953 if (h != NULL && h->dynindx != -1)
2954 indx = h->dynindx;
2955 else
2956 indx = 0;
2957 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2958 if (indx == 0)
2959 outrel.r_addend = relocation - dtpoff_base (info);
2960 else
2961 outrel.r_addend = 0;
2962 sreloc = elf_section_data (input_section)->sreloc;
2963 if (sreloc == NULL)
2964 abort ();
2965 loc = sreloc->contents;
2966 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2967 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2968 }
2969 else
2970 {
2971 BFD_ASSERT (! unresolved_reloc);
2972 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2973 contents + rel->r_offset);
2974 }
2975 continue;
2976
2977 case R_390_TLS_LDO64:
2978 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
2979 relocation -= dtpoff_base (info);
2980 else
2981 /* When converting LDO to LE, we must negate. */
2982 relocation = -tpoff (info, relocation);
2983 break;
2984
2985 /* Relocations for tls instructions. */
2986 case R_390_TLS_LOAD:
2987 case R_390_TLS_GDCALL:
2988 case R_390_TLS_LDCALL:
2989 tls_type = GOT_UNKNOWN;
2990 if (h == NULL && local_got_offsets)
2991 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2992 else if (h != NULL)
2993 tls_type = elf_s390_hash_entry(h)->tls_type;
2994
2995 if (tls_type == GOT_TLS_GD)
2996 continue;
2997
2998 if (r_type == R_390_TLS_LOAD)
2999 {
3000 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3001 {
3002 /* IE->LE transition. Four valid cases:
3003 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3004 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3005 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3006 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3007 unsigned int insn0, insn1, ry;
3008
3009 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3010 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3011 if (insn1 != 0x0004)
3012 {
3013 invalid_tls_insn (input_bfd, input_section, rel);
3014 return FALSE;
3015 }
3016 if ((insn0 & 0xff00f000) == 0xe3000000)
3017 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3018 ry = (insn0 & 0x000f0000);
3019 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3020 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3021 ry = (insn0 & 0x0000f000) << 4;
3022 else if ((insn0 & 0xff00f000) == 0xe300c000)
3023 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3024 ry = (insn0 & 0x000f0000);
3025 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3026 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3027 ry = (insn0 & 0x0000f000) << 4;
3028 else
3029 {
3030 invalid_tls_insn (input_bfd, input_section, rel);
3031 return FALSE;
3032 }
3033 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3034 insn1 = 0x000d;
3035 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3036 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3037 }
3038 }
3039 else if (r_type == R_390_TLS_GDCALL)
3040 {
3041 unsigned int insn0, insn1;
3042
3043 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3044 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3045 if ((insn0 & 0xffff0000) != 0xc0e50000)
3046 {
3047 invalid_tls_insn (input_bfd, input_section, rel);
3048 return FALSE;
3049 }
3050 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3051 {
3052 /* GD->LE transition.
3053 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3054 insn0 = 0xc0040000;
3055 insn1 = 0x0000;
3056 }
3057 else
3058 {
3059 /* GD->IE transition.
3060 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3061 insn0 = 0xe322c000;
3062 insn1 = 0x0004;
3063 }
3064 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3065 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3066 }
3067 else if (r_type == R_390_TLS_LDCALL)
3068 {
3069 if (!bfd_link_pic (info))
3070 {
3071 unsigned int insn0, insn1;
3072
3073 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3074 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3075 if ((insn0 & 0xffff0000) != 0xc0e50000)
3076 {
3077 invalid_tls_insn (input_bfd, input_section, rel);
3078 return FALSE;
3079 }
3080 /* LD->LE transition.
3081 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3082 insn0 = 0xc0040000;
3083 insn1 = 0x0000;
3084 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3085 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3086 }
3087 }
3088 continue;
3089
3090 default:
3091 break;
3092 }
3093
3094 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3095 because such sections are not SEC_ALLOC and thus ld.so will
3096 not process them. */
3097 if (unresolved_reloc
3098 && !((input_section->flags & SEC_DEBUGGING) != 0
3099 && h->def_dynamic)
3100 && _bfd_elf_section_offset (output_bfd, info, input_section,
3101 rel->r_offset) != (bfd_vma) -1)
3102 _bfd_error_handler
3103 /* xgettext:c-format */
3104 (_("%pB(%pA+%#" PRIx64 "): "
3105 "unresolvable %s relocation against symbol `%s'"),
3106 input_bfd,
3107 input_section,
3108 (uint64_t) rel->r_offset,
3109 howto->name,
3110 h->root.root.string);
3111
3112 do_relocation:
3113
3114 /* When applying a 24 bit reloc we need to start one byte
3115 earlier. Otherwise the 32 bit get/put bfd operations might
3116 access a byte after the actual section. */
3117 if (r_type == R_390_PC24DBL
3118 || r_type == R_390_PLT24DBL)
3119 rel->r_offset--;
3120
3121 if (r_type == R_390_20
3122 || r_type == R_390_GOT20
3123 || r_type == R_390_GOTPLT20
3124 || r_type == R_390_TLS_GOTIE20)
3125 {
3126 relocation += rel->r_addend;
3127 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3128 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3129 contents, rel->r_offset,
3130 relocation, 0);
3131 }
3132 else
3133 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3134 contents, rel->r_offset,
3135 relocation, rel->r_addend);
3136
3137 if (r != bfd_reloc_ok)
3138 {
3139 const char *name;
3140
3141 if (h != NULL)
3142 name = h->root.root.string;
3143 else
3144 {
3145 name = bfd_elf_string_from_elf_section (input_bfd,
3146 symtab_hdr->sh_link,
3147 sym->st_name);
3148 if (name == NULL)
3149 return FALSE;
3150 if (*name == '\0')
3151 name = bfd_section_name (sec);
3152 }
3153
3154 if (r == bfd_reloc_overflow)
3155 (*info->callbacks->reloc_overflow)
3156 (info, (h ? &h->root : NULL), name, howto->name,
3157 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3158 else
3159 {
3160 _bfd_error_handler
3161 /* xgettext:c-format */
3162 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3163 input_bfd, input_section,
3164 (uint64_t) rel->r_offset, name, (int) r);
3165 return FALSE;
3166 }
3167 }
3168 }
3169
3170 return TRUE;
3171 }
3172
3173 /* Generate the PLT slots together with the dynamic relocations needed
3174 for IFUNC symbols. */
3175
3176 static void
3177 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3178 struct bfd_link_info *info,
3179 struct elf_link_hash_entry *h,
3180 struct elf_s390_link_hash_table *htab,
3181 bfd_vma plt_offset,
3182 bfd_vma resolver_address)
3183 {
3184 bfd_vma plt_index;
3185 bfd_vma got_offset;
3186 Elf_Internal_Rela rela;
3187 bfd_byte *loc;
3188 asection *plt, *gotplt, *relplt;
3189
3190 if (htab->elf.iplt == NULL
3191 || htab->elf.igotplt == NULL
3192 || htab->elf.irelplt == NULL)
3193 abort ();
3194
3195 /* Index of the PLT slot within iplt section. */
3196 plt_index = plt_offset / PLT_ENTRY_SIZE;
3197 plt = htab->elf.iplt;
3198 /* Offset into the igot.plt section. */
3199 got_offset = plt_index * GOT_ENTRY_SIZE;
3200 gotplt = htab->elf.igotplt;
3201 relplt = htab->elf.irelplt;
3202
3203 /* Fill in the blueprint of a PLT. */
3204 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3205 PLT_ENTRY_SIZE);
3206
3207 /* Fixup the relative address to the GOT entry */
3208 bfd_put_32 (output_bfd,
3209 (gotplt->output_section->vma +
3210 gotplt->output_offset + got_offset
3211 - (plt->output_section->vma +
3212 plt->output_offset +
3213 plt_offset))/2,
3214 plt->contents + plt_offset + 2);
3215 /* Fixup the relative branch to PLT 0 */
3216 bfd_put_32 (output_bfd, - (plt->output_offset +
3217 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3218 plt->contents + plt_offset + 24);
3219 /* Fixup offset into .rela.plt section. */
3220 bfd_put_32 (output_bfd, relplt->output_offset +
3221 plt_index * sizeof (Elf64_External_Rela),
3222 plt->contents + plt_offset + 28);
3223
3224 /* Fill in the entry in the global offset table.
3225 Points to instruction after GOT offset. */
3226 bfd_put_64 (output_bfd,
3227 (plt->output_section->vma
3228 + plt->output_offset
3229 + plt_offset
3230 + 14),
3231 gotplt->contents + got_offset);
3232
3233 /* Fill in the entry in the .rela.plt section. */
3234 rela.r_offset = (gotplt->output_section->vma
3235 + gotplt->output_offset
3236 + got_offset);
3237
3238 if (!h
3239 || h->dynindx == -1
3240 || ((bfd_link_executable (info)
3241 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3242 && h->def_regular))
3243 {
3244 /* The symbol can be locally resolved. */
3245 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3246 rela.r_addend = resolver_address;
3247 }
3248 else
3249 {
3250 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3251 rela.r_addend = 0;
3252 }
3253
3254 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3255 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3256 }
3257
3258
3259 /* Finish up dynamic symbol handling. We set the contents of various
3260 dynamic sections here. */
3261
3262 static bfd_boolean
3263 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3264 struct bfd_link_info *info,
3265 struct elf_link_hash_entry *h,
3266 Elf_Internal_Sym *sym)
3267 {
3268 struct elf_s390_link_hash_table *htab;
3269 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3270
3271 htab = elf_s390_hash_table (info);
3272 if (htab == NULL)
3273 return FALSE;
3274
3275 if (h->plt.offset != (bfd_vma) -1)
3276 {
3277 bfd_vma plt_index;
3278 bfd_vma gotplt_offset;
3279 Elf_Internal_Rela rela;
3280 bfd_byte *loc;
3281
3282 /* This symbol has an entry in the procedure linkage table. Set
3283 it up. */
3284 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3285 {
3286 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3287 htab, h->plt.offset,
3288 eh->ifunc_resolver_address +
3289 eh->ifunc_resolver_section->output_offset +
3290 eh->ifunc_resolver_section->output_section->vma);
3291
3292 /* Do not return yet. Handling of explicit GOT slots of
3293 IFUNC symbols is below. */
3294 }
3295 else
3296 {
3297 if (h->dynindx == -1
3298 || htab->elf.splt == NULL
3299 || htab->elf.sgotplt == NULL
3300 || htab->elf.srelplt == NULL)
3301 abort ();
3302
3303 /* Calc. index no.
3304 Current offset - size first entry / entry size. */
3305 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3306
3307 /* The slots in the .got.plt correspond to the PLT slots in
3308 the same order. */
3309 gotplt_offset = plt_index * GOT_ENTRY_SIZE;
3310
3311 /* If .got.plt comes first it needs to contain the 3 header
3312 entries. */
3313 if (!s390_gotplt_after_got_p (info))
3314 gotplt_offset += 3 * GOT_ENTRY_SIZE;
3315
3316 /* Fill in the blueprint of a PLT. */
3317 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3318 PLT_ENTRY_SIZE);
3319
3320 /* The first instruction in the PLT entry is a LARL loading
3321 the address of the GOT slot. We write the 4 byte
3322 immediate operand of the LARL instruction here. */
3323 bfd_put_32 (output_bfd,
3324 (htab->elf.sgotplt->output_section->vma +
3325 htab->elf.sgotplt->output_offset + gotplt_offset
3326 - (htab->elf.splt->output_section->vma +
3327 htab->elf.splt->output_offset +
3328 h->plt.offset))/2,
3329 htab->elf.splt->contents + h->plt.offset + 2);
3330 /* Fixup the relative branch to PLT 0 */
3331 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3332 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3333 htab->elf.splt->contents + h->plt.offset + 24);
3334 /* Fixup offset into .rela.plt section. */
3335 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3336 htab->elf.splt->contents + h->plt.offset + 28);
3337
3338 /* Fill in the entry in the global offset table.
3339 Points to instruction after GOT offset. */
3340 bfd_put_64 (output_bfd,
3341 (htab->elf.splt->output_section->vma
3342 + htab->elf.splt->output_offset
3343 + h->plt.offset
3344 + 14),
3345 htab->elf.sgotplt->contents + gotplt_offset);
3346
3347 /* Fill in the entry in the .rela.plt section. */
3348 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3349 + htab->elf.sgotplt->output_offset
3350 + gotplt_offset);
3351 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3352 rela.r_addend = 0;
3353 loc = htab->elf.srelplt->contents + plt_index *
3354 sizeof (Elf64_External_Rela);
3355 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3356
3357 if (!h->def_regular)
3358 {
3359 /* Mark the symbol as undefined, rather than as defined in
3360 the .plt section. Leave the value alone. This is a clue
3361 for the dynamic linker, to make function pointer
3362 comparisons work between an application and shared
3363 library. */
3364 sym->st_shndx = SHN_UNDEF;
3365 }
3366 }
3367 }
3368
3369 if (h->got.offset != (bfd_vma) -1
3370 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3371 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3372 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3373 {
3374 Elf_Internal_Rela rela;
3375 bfd_byte *loc;
3376
3377 /* This symbol has an entry in the global offset table. Set it
3378 up. */
3379 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3380 abort ();
3381
3382 rela.r_offset = (htab->elf.sgot->output_section->vma
3383 + htab->elf.sgot->output_offset
3384 + (h->got.offset &~ (bfd_vma) 1));
3385
3386 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3387 {
3388 if (bfd_link_pic (info))
3389 {
3390 /* An explicit GOT slot usage needs GLOB_DAT. If the
3391 symbol references local the implicit got.iplt slot
3392 will be used and the IRELATIVE reloc has been created
3393 above. */
3394 goto do_glob_dat;
3395 }
3396 else
3397 {
3398 /* For non-shared objects explicit GOT slots must be
3399 filled with the PLT slot address for pointer
3400 equality reasons. */
3401 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3402 + htab->elf.iplt->output_offset
3403 + h->plt.offset),
3404 htab->elf.sgot->contents + h->got.offset);
3405 return TRUE;
3406 }
3407 }
3408 else if (bfd_link_pic (info)
3409 && SYMBOL_REFERENCES_LOCAL (info, h))
3410 {
3411 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3412 return TRUE;
3413
3414 /* If this is a static link, or it is a -Bsymbolic link and
3415 the symbol is defined locally or was forced to be local
3416 because of a version file, we just want to emit a
3417 RELATIVE reloc. The entry in the global offset table
3418 will already have been initialized in the
3419 relocate_section function. */
3420 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3421 return FALSE;
3422 BFD_ASSERT((h->got.offset & 1) != 0);
3423 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3424 rela.r_addend = (h->root.u.def.value
3425 + h->root.u.def.section->output_section->vma
3426 + h->root.u.def.section->output_offset);
3427 }
3428 else
3429 {
3430 BFD_ASSERT((h->got.offset & 1) == 0);
3431 do_glob_dat:
3432 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3433 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3434 rela.r_addend = 0;
3435 }
3436
3437 loc = htab->elf.srelgot->contents;
3438 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3439 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3440 }
3441
3442 if (h->needs_copy)
3443 {
3444 Elf_Internal_Rela rela;
3445 asection *s;
3446 bfd_byte *loc;
3447
3448 /* This symbols needs a copy reloc. Set it up. */
3449
3450 if (h->dynindx == -1
3451 || (h->root.type != bfd_link_hash_defined
3452 && h->root.type != bfd_link_hash_defweak)
3453 || htab->elf.srelbss == NULL)
3454 abort ();
3455
3456 rela.r_offset = (h->root.u.def.value
3457 + h->root.u.def.section->output_section->vma
3458 + h->root.u.def.section->output_offset);
3459 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3460 rela.r_addend = 0;
3461 if (h->root.u.def.section == htab->elf.sdynrelro)
3462 s = htab->elf.sreldynrelro;
3463 else
3464 s = htab->elf.srelbss;
3465 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3466 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3467 }
3468
3469 /* Mark some specially defined symbols as absolute. */
3470 if (h == htab->elf.hdynamic
3471 || h == htab->elf.hgot
3472 || h == htab->elf.hplt)
3473 sym->st_shndx = SHN_ABS;
3474
3475 return TRUE;
3476 }
3477
3478 /* Used to decide how to sort relocs in an optimal manner for the
3479 dynamic linker, before writing them out. */
3480
3481 static enum elf_reloc_type_class
3482 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3483 const asection *rel_sec ATTRIBUTE_UNUSED,
3484 const Elf_Internal_Rela *rela)
3485 {
3486 bfd *abfd = info->output_bfd;
3487 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3488 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3489 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3490 Elf_Internal_Sym sym;
3491
3492 if (htab->elf.dynsym == NULL
3493 || !bed->s->swap_symbol_in (abfd,
3494 (htab->elf.dynsym->contents
3495 + r_symndx * bed->s->sizeof_sym),
3496 0, &sym))
3497 abort ();
3498
3499 /* Check relocation against STT_GNU_IFUNC symbol. */
3500 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3501 return reloc_class_ifunc;
3502
3503 switch ((int) ELF64_R_TYPE (rela->r_info))
3504 {
3505 case R_390_RELATIVE:
3506 return reloc_class_relative;
3507 case R_390_JMP_SLOT:
3508 return reloc_class_plt;
3509 case R_390_COPY:
3510 return reloc_class_copy;
3511 default:
3512 return reloc_class_normal;
3513 }
3514 }
3515
3516 /* Finish up the dynamic sections. */
3517
3518 static bfd_boolean
3519 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3520 struct bfd_link_info *info)
3521 {
3522 struct elf_s390_link_hash_table *htab;
3523 bfd *dynobj;
3524 asection *sdyn;
3525 bfd *ibfd;
3526 unsigned int i;
3527
3528 htab = elf_s390_hash_table (info);
3529 if (htab == NULL)
3530 return FALSE;
3531
3532 dynobj = htab->elf.dynobj;
3533 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3534
3535 if (htab->elf.dynamic_sections_created)
3536 {
3537 Elf64_External_Dyn *dyncon, *dynconend;
3538
3539 if (sdyn == NULL || htab->elf.sgot == NULL)
3540 abort ();
3541
3542 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3543 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3544 for (; dyncon < dynconend; dyncon++)
3545 {
3546 Elf_Internal_Dyn dyn;
3547 asection *s;
3548
3549 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3550
3551 switch (dyn.d_tag)
3552 {
3553 default:
3554 continue;
3555
3556 case DT_PLTGOT:
3557 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3558 dyn.d_un.d_ptr = s390_got_pointer (info);
3559 break;
3560
3561 case DT_JMPREL:
3562 s = htab->elf.srelplt;
3563 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3564 break;
3565
3566 case DT_PLTRELSZ:
3567 dyn.d_un.d_val = htab->elf.srelplt->size;
3568 if (htab->elf.irelplt)
3569 dyn.d_un.d_val += htab->elf.irelplt->size;
3570 break;
3571
3572 case DT_RELASZ:
3573 /* The procedure linkage table relocs (DT_JMPREL) should
3574 not be included in the overall relocs (DT_RELA).
3575 Therefore, we override the DT_RELASZ entry here to
3576 make it not include the JMPREL relocs. Since the
3577 linker script arranges for .rela.plt to follow all
3578 other relocation sections, we don't have to worry
3579 about changing the DT_RELA entry. */
3580 dyn.d_un.d_val -= htab->elf.srelplt->size;
3581 if (htab->elf.irelplt)
3582 dyn.d_un.d_val -= htab->elf.irelplt->size;
3583 break;
3584 }
3585
3586 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3587 }
3588
3589 /* Fill in the special first entry in the procedure linkage table. */
3590 if (htab->elf.splt && htab->elf.splt->size > 0)
3591 {
3592 /* fill in blueprint for plt 0 entry */
3593 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3594 PLT_FIRST_ENTRY_SIZE);
3595 /* The second instruction in the first PLT entry is a LARL
3596 loading the GOT pointer. Fill in the LARL immediate
3597 address. */
3598 bfd_put_32 (output_bfd,
3599 (s390_got_pointer (info)
3600 - htab->elf.splt->output_section->vma
3601 - htab->elf.splt->output_offset - 6)/2,
3602 htab->elf.splt->contents + 8);
3603 }
3604 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3605 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3606 = PLT_ENTRY_SIZE;
3607 }
3608
3609 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
3610 {
3611 /* Fill in the first three entries in the global offset table. */
3612 if (htab->elf.hgot->root.u.def.section->size > 0)
3613 {
3614 bfd_put_64 (output_bfd,
3615 (sdyn == NULL ? (bfd_vma) 0
3616 : sdyn->output_section->vma + sdyn->output_offset),
3617 htab->elf.hgot->root.u.def.section->contents);
3618 /* One entry for shared object struct ptr. */
3619 bfd_put_64 (output_bfd, (bfd_vma) 0,
3620 htab->elf.hgot->root.u.def.section->contents + 8);
3621 /* One entry for _dl_runtime_resolve. */
3622 bfd_put_64 (output_bfd, (bfd_vma) 0,
3623 htab->elf.hgot->root.u.def.section->contents + 16);
3624 }
3625 elf_section_data (htab->elf.sgot->output_section)
3626 ->this_hdr.sh_entsize = 8;
3627 }
3628
3629 /* Finish dynamic symbol for local IFUNC symbols. */
3630 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3631 {
3632 struct plt_entry *local_plt;
3633 Elf_Internal_Sym *isym;
3634 Elf_Internal_Shdr *symtab_hdr;
3635
3636 symtab_hdr = &elf_symtab_hdr (ibfd);
3637
3638 if (!is_s390_elf (ibfd))
3639 continue;
3640
3641 local_plt = elf_s390_local_plt (ibfd);
3642 if (local_plt != NULL)
3643 for (i = 0; i < symtab_hdr->sh_info; i++)
3644 {
3645 if (local_plt[i].plt.offset != (bfd_vma) -1)
3646 {
3647 asection *sec = local_plt[i].sec;
3648 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3649 if (isym == NULL)
3650 return FALSE;
3651
3652 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3653 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3654 local_plt[i].plt.offset,
3655 isym->st_value
3656 + sec->output_section->vma
3657 + sec->output_offset);
3658
3659 }
3660 }
3661 }
3662
3663 return TRUE;
3664 }
3665 \f
3666 /* Support for core dump NOTE sections. */
3667
3668 static bfd_boolean
3669 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3670 {
3671 int offset;
3672 size_t size;
3673
3674 switch (note->descsz)
3675 {
3676 default:
3677 return FALSE;
3678
3679 case 336: /* sizeof(struct elf_prstatus) on s390x */
3680 /* pr_cursig */
3681 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3682
3683 /* pr_pid */
3684 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3685
3686 /* pr_reg */
3687 offset = 112;
3688 size = 216;
3689 break;
3690 }
3691
3692 /* Make a ".reg/999" section. */
3693 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3694 size, note->descpos + offset);
3695 }
3696
3697 static bfd_boolean
3698 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3699 {
3700 switch (note->descsz)
3701 {
3702 default:
3703 return FALSE;
3704
3705 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3706 elf_tdata (abfd)->core->pid
3707 = bfd_get_32 (abfd, note->descdata + 24);
3708 elf_tdata (abfd)->core->program
3709 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3710 elf_tdata (abfd)->core->command
3711 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3712 }
3713
3714 /* Note that for some reason, a spurious space is tacked
3715 onto the end of the args in some (at least one anyway)
3716 implementations, so strip it off if it exists. */
3717
3718 {
3719 char *command = elf_tdata (abfd)->core->command;
3720 int n = strlen (command);
3721
3722 if (0 < n && command[n - 1] == ' ')
3723 command[n - 1] = '\0';
3724 }
3725
3726 return TRUE;
3727 }
3728
3729 static char *
3730 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3731 int note_type, ...)
3732 {
3733 va_list ap;
3734
3735 switch (note_type)
3736 {
3737 default:
3738 return NULL;
3739
3740 case NT_PRPSINFO:
3741 {
3742 char data[136] ATTRIBUTE_NONSTRING = { 0 };
3743 const char *fname, *psargs;
3744
3745 va_start (ap, note_type);
3746 fname = va_arg (ap, const char *);
3747 psargs = va_arg (ap, const char *);
3748 va_end (ap);
3749
3750 strncpy (data + 40, fname, 16);
3751 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3752 DIAGNOSTIC_PUSH;
3753 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3754 -Wstringop-truncation:
3755 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3756 */
3757 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3758 #endif
3759 strncpy (data + 56, psargs, 80);
3760 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3761 DIAGNOSTIC_POP;
3762 #endif
3763 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3764 &data, sizeof (data));
3765 }
3766
3767 case NT_PRSTATUS:
3768 {
3769 char data[336] = { 0 };
3770 long pid;
3771 int cursig;
3772 const void *gregs;
3773
3774 va_start (ap, note_type);
3775 pid = va_arg (ap, long);
3776 cursig = va_arg (ap, int);
3777 gregs = va_arg (ap, const void *);
3778 va_end (ap);
3779
3780 bfd_put_16 (abfd, cursig, data + 12);
3781 bfd_put_32 (abfd, pid, data + 32);
3782 memcpy (data + 112, gregs, 216);
3783 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3784 &data, sizeof (data));
3785 }
3786 }
3787 /* NOTREACHED */
3788 }
3789 \f
3790 /* Return address for Ith PLT stub in section PLT, for relocation REL
3791 or (bfd_vma) -1 if it should not be included. */
3792
3793 static bfd_vma
3794 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3795 const arelent *rel ATTRIBUTE_UNUSED)
3796 {
3797 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3798 }
3799
3800 /* Merge backend specific data from an object file to the output
3801 object file when linking. */
3802
3803 static bfd_boolean
3804 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3805 {
3806 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3807 return TRUE;
3808
3809 return elf_s390_merge_obj_attributes (ibfd, info);
3810 }
3811
3812 /* We may add a PT_S390_PGSTE program header. */
3813
3814 static int
3815 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3816 struct bfd_link_info *info)
3817 {
3818 struct elf_s390_link_hash_table *htab;
3819
3820 if (info)
3821 {
3822 htab = elf_s390_hash_table (info);
3823 if (htab)
3824 return htab->params->pgste;
3825 }
3826 return 0;
3827 }
3828
3829
3830 /* Add the PT_S390_PGSTE program header. */
3831
3832 static bfd_boolean
3833 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3834 {
3835 struct elf_s390_link_hash_table *htab;
3836 struct elf_segment_map *m, *pm = NULL;
3837
3838 if (!abfd || !info)
3839 return TRUE;
3840
3841 htab = elf_s390_hash_table (info);
3842 if (!htab || !htab->params->pgste)
3843 return TRUE;
3844
3845 /* If there is already a PT_S390_PGSTE header, avoid adding
3846 another. */
3847 m = elf_seg_map (abfd);
3848 while (m && m->p_type != PT_S390_PGSTE)
3849 {
3850 pm = m;
3851 m = m->next;
3852 }
3853
3854 if (m)
3855 return TRUE;
3856
3857 m = (struct elf_segment_map *)
3858 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3859 if (m == NULL)
3860 return FALSE;
3861 m->p_type = PT_S390_PGSTE;
3862 m->count = 0;
3863 m->next = NULL;
3864 if (pm)
3865 pm->next = m;
3866
3867 return TRUE;
3868 }
3869
3870 bfd_boolean
3871 bfd_elf_s390_set_options (struct bfd_link_info *info,
3872 struct s390_elf_params *params)
3873 {
3874 struct elf_s390_link_hash_table *htab;
3875
3876 if (info)
3877 {
3878 htab = elf_s390_hash_table (info);
3879 if (htab)
3880 htab->params = params;
3881 }
3882
3883 return TRUE;
3884 }
3885
3886
3887 /* Why was the hash table entry size definition changed from
3888 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3889 this is the only reason for the s390_elf64_size_info structure. */
3890
3891 const struct elf_size_info s390_elf64_size_info =
3892 {
3893 sizeof (Elf64_External_Ehdr),
3894 sizeof (Elf64_External_Phdr),
3895 sizeof (Elf64_External_Shdr),
3896 sizeof (Elf64_External_Rel),
3897 sizeof (Elf64_External_Rela),
3898 sizeof (Elf64_External_Sym),
3899 sizeof (Elf64_External_Dyn),
3900 sizeof (Elf_External_Note),
3901 8, /* hash-table entry size. */
3902 1, /* internal relocations per external relocations. */
3903 64, /* arch_size. */
3904 3, /* log_file_align. */
3905 ELFCLASS64, EV_CURRENT,
3906 bfd_elf64_write_out_phdrs,
3907 bfd_elf64_write_shdrs_and_ehdr,
3908 bfd_elf64_checksum_contents,
3909 bfd_elf64_write_relocs,
3910 bfd_elf64_swap_symbol_in,
3911 bfd_elf64_swap_symbol_out,
3912 bfd_elf64_slurp_reloc_table,
3913 bfd_elf64_slurp_symbol_table,
3914 bfd_elf64_swap_dyn_in,
3915 bfd_elf64_swap_dyn_out,
3916 bfd_elf64_swap_reloc_in,
3917 bfd_elf64_swap_reloc_out,
3918 bfd_elf64_swap_reloca_in,
3919 bfd_elf64_swap_reloca_out
3920 };
3921
3922 #define TARGET_BIG_SYM s390_elf64_vec
3923 #define TARGET_BIG_NAME "elf64-s390"
3924 #define ELF_ARCH bfd_arch_s390
3925 #define ELF_TARGET_ID S390_ELF_DATA
3926 #define ELF_MACHINE_CODE EM_S390
3927 #define ELF_MACHINE_ALT1 EM_S390_OLD
3928 #define ELF_MAXPAGESIZE 0x1000
3929
3930 #define elf_backend_size_info s390_elf64_size_info
3931
3932 #define elf_backend_can_gc_sections 1
3933 #define elf_backend_can_refcount 1
3934 #define elf_backend_want_got_plt 1
3935 #define elf_backend_plt_readonly 1
3936 #define elf_backend_want_plt_sym 0
3937 #define elf_backend_got_header_size 24
3938 #define elf_backend_want_dynrelro 1
3939 #define elf_backend_rela_normal 1
3940
3941 #define elf_info_to_howto elf_s390_info_to_howto
3942
3943 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3944 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3945 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3946 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3947 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3948
3949 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3950 #define elf_backend_check_relocs elf_s390_check_relocs
3951 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3952 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3953 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3954 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3955 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3956 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3957 #define elf_backend_relocate_section elf_s390_relocate_section
3958 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3959 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3960 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3961 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
3962 #define elf_backend_write_core_note elf_s390_write_core_note
3963 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3964 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3965 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
3966 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
3967
3968 #define bfd_elf64_mkobject elf_s390_mkobject
3969 #define elf_backend_object_p elf_s390_object_p
3970
3971 #include "elf64-target.h"
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