?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Support x86 Intel MSR_IMM
[binutils-gdb.git] / bfd / elf64-s390.c
blobf9d9902651bfe6e4905abd48074d66f79100843c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2024 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 0, /* size */
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, 1, 8, false, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_8", false, 0,0x000000ff, false),
61 HOWTO(R_390_12, 0, 2, 12, false, 0, complain_overflow_dont,
62 bfd_elf_generic_reloc, "R_390_12", false, 0,0x00000fff, false),
63 HOWTO(R_390_16, 0, 2, 16, false, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_16", false, 0,0x0000ffff, false),
65 HOWTO(R_390_32, 0, 4, 32, false, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_32", false, 0,0xffffffff, false),
67 HOWTO(R_390_PC32, 0, 4, 32, true, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_PC32", false, 0,0xffffffff, true),
69 HOWTO(R_390_GOT12, 0, 2, 12, false, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT12", false, 0,0x00000fff, false),
71 HOWTO(R_390_GOT32, 0, 4, 32, false, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_GOT32", false, 0,0xffffffff, false),
73 HOWTO(R_390_PLT32, 0, 4, 32, true, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_PLT32", false, 0,0xffffffff, true),
75 HOWTO(R_390_COPY, 0, 8, 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, 8, 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, 8, 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, 8, 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, 4, 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, 8, 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, 2, 16, false, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_GOT16", false, 0,0x0000ffff, false),
89 HOWTO(R_390_PC16, 0, 2, 16, true, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16", false, 0,0x0000ffff, true),
91 HOWTO(R_390_PC16DBL, 1, 2, 16, true, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC16DBL", false, 0,0x0000ffff, true),
93 HOWTO(R_390_PLT16DBL, 1, 2, 16, true, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true),
95 HOWTO(R_390_PC32DBL, 1, 4, 32, true, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PC32DBL", false, 0,0xffffffff, true),
97 HOWTO(R_390_PLT32DBL, 1, 4, 32, true, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_PLT32DBL", false, 0,0xffffffff, true),
99 HOWTO(R_390_GOTPCDBL, 1, 4, 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, 8, 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, 8, 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, 8, 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, 8, 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, 4, 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, 2, 16, false, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF16", false, 0,0x0000ffff, false),
113 HOWTO(R_390_GOTOFF64, 0, 8, 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, 2, 12, false, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_GOTPLT12", false, 0,0x00000fff, false),
117 HOWTO(R_390_GOTPLT16, 0, 2, 16, false, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT16", false, 0,0x0000ffff, false),
119 HOWTO(R_390_GOTPLT32, 0, 4, 32, false, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT32", false, 0,0xffffffff, false),
121 HOWTO(R_390_GOTPLT64, 0, 8, 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, 4, 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, 2, 16, false, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF16", false, 0,0x0000ffff, false),
127 HOWTO(R_390_PLTOFF32, 0, 4, 32, false, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF32", false, 0,0xffffffff, false),
129 HOWTO(R_390_PLTOFF64, 0, 8, 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, 8, 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, 2, 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, 8, 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, 8, 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, 8, 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, 4, 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, 4, 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, 8, 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, 8, 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, 8, 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, 8, 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, 4, 20, false, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_20", false, 0,0x0fffff00, false),
167 HOWTO(R_390_GOT20, 0, 4, 20, false, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOT20", false, 0,0x0fffff00, false),
169 HOWTO(R_390_GOTPLT20, 0, 4, 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, 4, 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, 8, 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, 2, 12, true, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PC12DBL", false, 0,0x00000fff, true),
177 HOWTO(R_390_PLT12DBL, 1, 2, 12, true, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLT12DBL", false, 0,0x00000fff, true),
179 HOWTO(R_390_PC24DBL, 1, 4, 24, true, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PC24DBL", false, 0,0x00ffffff, true),
181 HOWTO(R_390_PLT24DBL, 1, 4, 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, 0,8,0,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, 0,8,0,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 bool
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 bool
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 bool
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 bool
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 /* Options passed from the linker. */
667 struct s390_elf_params *params;
668 };
669
670 /* Get the s390 ELF linker hash table from a link_info structure. */
671
672 #define elf_s390_hash_table(p) \
673 ((is_elf_hash_table ((p)->hash) \
674 && elf_hash_table_id (elf_hash_table (p)) == S390_ELF_DATA) \
675 ? (struct elf_s390_link_hash_table *) (p)->hash : NULL)
676
677 #define ELF64 1
678 #include "elf-s390-common.c"
679
680 /* Create an entry in an s390 ELF linker hash table. */
681
682 static struct bfd_hash_entry *
683 link_hash_newfunc (struct bfd_hash_entry *entry,
684 struct bfd_hash_table *table,
685 const char *string)
686 {
687 /* Allocate the structure if it has not already been allocated by a
688 subclass. */
689 if (entry == NULL)
690 {
691 entry = bfd_hash_allocate (table,
692 sizeof (struct elf_s390_link_hash_entry));
693 if (entry == NULL)
694 return entry;
695 }
696
697 /* Call the allocation method of the superclass. */
698 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
699 if (entry != NULL)
700 {
701 struct elf_s390_link_hash_entry *eh;
702
703 eh = (struct elf_s390_link_hash_entry *) entry;
704 eh->gotplt_refcount = 0;
705 eh->tls_type = GOT_UNKNOWN;
706 eh->ifunc_resolver_address = 0;
707 eh->ifunc_resolver_section = NULL;
708 }
709
710 return entry;
711 }
712
713 /* Create an s390 ELF linker hash table. */
714
715 static struct bfd_link_hash_table *
716 elf_s390_link_hash_table_create (bfd *abfd)
717 {
718 struct elf_s390_link_hash_table *ret;
719 size_t amt = sizeof (struct elf_s390_link_hash_table);
720
721 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
722 if (ret == NULL)
723 return NULL;
724
725 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
726 sizeof (struct elf_s390_link_hash_entry),
727 S390_ELF_DATA))
728 {
729 free (ret);
730 return NULL;
731 }
732
733 return &ret->elf.root;
734 }
735
736 /* Copy the extra info we tack onto an elf_link_hash_entry. */
737
738 static void
739 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
740 struct elf_link_hash_entry *dir,
741 struct elf_link_hash_entry *ind)
742 {
743 struct elf_s390_link_hash_entry *edir, *eind;
744
745 edir = (struct elf_s390_link_hash_entry *) dir;
746 eind = (struct elf_s390_link_hash_entry *) ind;
747
748 if (ind->root.type == bfd_link_hash_indirect
749 && dir->got.refcount <= 0)
750 {
751 edir->tls_type = eind->tls_type;
752 eind->tls_type = GOT_UNKNOWN;
753 }
754
755 if (ELIMINATE_COPY_RELOCS
756 && ind->root.type != bfd_link_hash_indirect
757 && dir->dynamic_adjusted)
758 {
759 /* If called to transfer flags for a weakdef during processing
760 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
761 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
762 if (dir->versioned != versioned_hidden)
763 dir->ref_dynamic |= ind->ref_dynamic;
764 dir->ref_regular |= ind->ref_regular;
765 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
766 dir->needs_plt |= ind->needs_plt;
767 }
768 else
769 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
770 }
771
772 static int
773 elf_s390_tls_transition (struct bfd_link_info *info,
774 int r_type,
775 int is_local)
776 {
777 if (bfd_link_dll (info))
778 return r_type;
779
780 switch (r_type)
781 {
782 case R_390_TLS_GD64:
783 case R_390_TLS_IE64:
784 if (is_local)
785 return R_390_TLS_LE64;
786 return R_390_TLS_IE64;
787 case R_390_TLS_GOTIE64:
788 if (is_local)
789 return R_390_TLS_LE64;
790 return R_390_TLS_GOTIE64;
791 case R_390_TLS_LDM64:
792 return R_390_TLS_LE64;
793 }
794
795 return r_type;
796 }
797
798 /* Look through the relocs for a section during the first phase, and
799 allocate space in the global offset table or procedure linkage
800 table. */
801
802 static bool
803 elf_s390_check_relocs (bfd *abfd,
804 struct bfd_link_info *info,
805 asection *sec,
806 const Elf_Internal_Rela *relocs)
807 {
808 struct elf_s390_link_hash_table *htab;
809 Elf_Internal_Shdr *symtab_hdr;
810 struct elf_link_hash_entry **sym_hashes;
811 const Elf_Internal_Rela *rel;
812 const Elf_Internal_Rela *rel_end;
813 asection *sreloc;
814 bfd_signed_vma *local_got_refcounts;
815 int tls_type, old_tls_type;
816
817 if (bfd_link_relocatable (info))
818 return true;
819
820 BFD_ASSERT (is_s390_elf (abfd));
821
822 htab = elf_s390_hash_table (info);
823 if (htab == NULL)
824 return false;
825
826 symtab_hdr = &elf_symtab_hdr (abfd);
827 sym_hashes = elf_sym_hashes (abfd);
828 local_got_refcounts = elf_local_got_refcounts (abfd);
829
830 sreloc = NULL;
831
832 rel_end = relocs + sec->reloc_count;
833 for (rel = relocs; rel < rel_end; rel++)
834 {
835 unsigned int r_type;
836 unsigned int r_symndx;
837 struct elf_link_hash_entry *h;
838 Elf_Internal_Sym *isym;
839
840 r_symndx = ELF64_R_SYM (rel->r_info);
841
842 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
843 {
844 /* xgettext:c-format */
845 _bfd_error_handler (_("%pB: bad symbol index: %d"),
846 abfd, r_symndx);
847 return false;
848 }
849
850 if (r_symndx < symtab_hdr->sh_info)
851 {
852 /* A local symbol. */
853 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
854 abfd, r_symndx);
855 if (isym == NULL)
856 return false;
857
858 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
859 {
860 struct plt_entry *plt;
861
862 if (htab->elf.dynobj == NULL)
863 htab->elf.dynobj = abfd;
864
865 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
866 return false;
867
868 if (local_got_refcounts == NULL)
869 {
870 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
871 return false;
872 local_got_refcounts = elf_local_got_refcounts (abfd);
873 }
874 plt = elf_s390_local_plt (abfd);
875 plt[r_symndx].plt.refcount++;
876 }
877 h = NULL;
878 }
879 else
880 {
881 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
882 while (h->root.type == bfd_link_hash_indirect
883 || h->root.type == bfd_link_hash_warning)
884 h = (struct elf_link_hash_entry *) h->root.u.i.link;
885 }
886
887 /* Create got section and local_got_refcounts array if they
888 are needed. */
889 r_type = elf_s390_tls_transition (info,
890 ELF64_R_TYPE (rel->r_info),
891 h == NULL);
892 switch (r_type)
893 {
894 case R_390_GOT12:
895 case R_390_GOT16:
896 case R_390_GOT20:
897 case R_390_GOT32:
898 case R_390_GOT64:
899 case R_390_GOTENT:
900 case R_390_GOTPLT12:
901 case R_390_GOTPLT16:
902 case R_390_GOTPLT20:
903 case R_390_GOTPLT32:
904 case R_390_GOTPLT64:
905 case R_390_GOTPLTENT:
906 case R_390_TLS_GD64:
907 case R_390_TLS_GOTIE12:
908 case R_390_TLS_GOTIE20:
909 case R_390_TLS_GOTIE64:
910 case R_390_TLS_IEENT:
911 case R_390_TLS_IE64:
912 case R_390_TLS_LDM64:
913 if (h == NULL
914 && local_got_refcounts == NULL)
915 {
916 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
917 return false;
918 local_got_refcounts = elf_local_got_refcounts (abfd);
919 }
920
921 /* Fall through. */
922 case R_390_GOTOFF16:
923 case R_390_GOTOFF32:
924 case R_390_GOTOFF64:
925 case R_390_GOTPC:
926 case R_390_GOTPCDBL:
927 if (htab->elf.sgot == NULL)
928 {
929 if (htab->elf.dynobj == NULL)
930 htab->elf.dynobj = abfd;
931 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
932 return false;
933 }
934 }
935
936 if (h != NULL)
937 {
938 if (htab->elf.dynobj == NULL)
939 htab->elf.dynobj = abfd;
940 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
941 return false;
942
943 /* Make sure an IFUNC symbol defined in a non-shared object
944 always gets a PLT slot. */
945 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
946 {
947 /* The symbol is called by the dynamic loader in order
948 to resolve the relocation. So it is in fact also
949 referenced. */
950 h->ref_regular = 1;
951 h->needs_plt = 1;
952 }
953 }
954
955 switch (r_type)
956 {
957 case R_390_GOTPC:
958 case R_390_GOTPCDBL:
959 /* These relocs do not need a GOT slot. They just load the
960 GOT pointer itself or address something else relative to
961 the GOT. Since the GOT pointer has been set up above we
962 are done. */
963 break;
964 case R_390_GOTOFF16:
965 case R_390_GOTOFF32:
966 case R_390_GOTOFF64:
967 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
968 break;
969 /* Fall through. */
970
971 case R_390_PLT12DBL:
972 case R_390_PLT16DBL:
973 case R_390_PLT24DBL:
974 case R_390_PLT32:
975 case R_390_PLT32DBL:
976 case R_390_PLT64:
977 case R_390_PLTOFF16:
978 case R_390_PLTOFF32:
979 case R_390_PLTOFF64:
980 /* This symbol requires a procedure linkage table entry. We
981 actually build the entry in adjust_dynamic_symbol,
982 because this might be a case of linking PIC code which is
983 never referenced by a dynamic object, in which case we
984 don't need to generate a procedure linkage table entry
985 after all. */
986
987 /* If this is a local symbol, we resolve it directly without
988 creating a procedure linkage table entry. */
989 if (h != NULL)
990 {
991 h->needs_plt = 1;
992 h->plt.refcount += 1;
993 }
994 break;
995
996 case R_390_GOTPLT12:
997 case R_390_GOTPLT16:
998 case R_390_GOTPLT20:
999 case R_390_GOTPLT32:
1000 case R_390_GOTPLT64:
1001 case R_390_GOTPLTENT:
1002 /* This symbol requires either a procedure linkage table entry
1003 or an entry in the local got. We actually build the entry
1004 in adjust_dynamic_symbol because whether this is really a
1005 global reference can change and with it the fact if we have
1006 to create a plt entry or a local got entry. To be able to
1007 make a once global symbol a local one we have to keep track
1008 of the number of gotplt references that exist for this
1009 symbol. */
1010 if (h != NULL)
1011 {
1012 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1013 h->needs_plt = 1;
1014 h->plt.refcount += 1;
1015 }
1016 else
1017 local_got_refcounts[r_symndx] += 1;
1018 break;
1019
1020 case R_390_TLS_LDM64:
1021 htab->tls_ldm_got.refcount += 1;
1022 break;
1023
1024 case R_390_TLS_IE64:
1025 case R_390_TLS_GOTIE12:
1026 case R_390_TLS_GOTIE20:
1027 case R_390_TLS_GOTIE64:
1028 case R_390_TLS_IEENT:
1029 if (bfd_link_dll (info))
1030 info->flags |= DF_STATIC_TLS;
1031 /* Fall through */
1032
1033 case R_390_GOT12:
1034 case R_390_GOT16:
1035 case R_390_GOT20:
1036 case R_390_GOT32:
1037 case R_390_GOT64:
1038 case R_390_GOTENT:
1039 case R_390_TLS_GD64:
1040 /* This symbol requires a global offset table entry. */
1041 switch (r_type)
1042 {
1043 default:
1044 case R_390_GOT12:
1045 case R_390_GOT16:
1046 case R_390_GOT20:
1047 case R_390_GOT32:
1048 case R_390_GOTENT:
1049 tls_type = GOT_NORMAL;
1050 break;
1051 case R_390_TLS_GD64:
1052 tls_type = GOT_TLS_GD;
1053 break;
1054 case R_390_TLS_IE64:
1055 case R_390_TLS_GOTIE64:
1056 tls_type = GOT_TLS_IE;
1057 break;
1058 case R_390_TLS_GOTIE12:
1059 case R_390_TLS_GOTIE20:
1060 case R_390_TLS_IEENT:
1061 tls_type = GOT_TLS_IE_NLT;
1062 break;
1063 }
1064
1065 if (h != NULL)
1066 {
1067 h->got.refcount += 1;
1068 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1069 }
1070 else
1071 {
1072 local_got_refcounts[r_symndx] += 1;
1073 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1074 }
1075 /* If a TLS symbol is accessed using IE at least once,
1076 there is no point to use dynamic model for it. */
1077 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1078 {
1079 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1080 {
1081 _bfd_error_handler
1082 /* xgettext:c-format */
1083 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1084 abfd, h->root.root.string);
1085 return false;
1086 }
1087 if (old_tls_type > tls_type)
1088 tls_type = old_tls_type;
1089 }
1090
1091 if (old_tls_type != tls_type)
1092 {
1093 if (h != NULL)
1094 elf_s390_hash_entry (h)->tls_type = tls_type;
1095 else
1096 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1097 }
1098
1099 if (r_type != R_390_TLS_IE64)
1100 break;
1101 /* Fall through */
1102
1103 case R_390_TLS_LE64:
1104 /* For static linking and executables this reloc will be
1105 calculated at linktime otherwise a TLS_TPOFF runtime
1106 reloc will be generated. */
1107 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1108 break;
1109
1110 if (!bfd_link_dll (info))
1111 break;
1112 info->flags |= DF_STATIC_TLS;
1113 /* Fall through */
1114
1115 case R_390_8:
1116 case R_390_16:
1117 case R_390_32:
1118 case R_390_64:
1119 case R_390_PC12DBL:
1120 case R_390_PC16:
1121 case R_390_PC16DBL:
1122 case R_390_PC24DBL:
1123 case R_390_PC32:
1124 case R_390_PC32DBL:
1125 case R_390_PC64:
1126 if (h != NULL && bfd_link_executable (info))
1127 {
1128 /* If this reloc is in a read-only section, we might
1129 need a copy reloc. We can't check reliably at this
1130 stage whether the section is read-only, as input
1131 sections have not yet been mapped to output sections.
1132 Tentatively set the flag for now, and correct in
1133 adjust_dynamic_symbol. */
1134 h->non_got_ref = 1;
1135
1136 if (!bfd_link_pic (info))
1137 {
1138 /* We may need a .plt entry if the function this reloc
1139 refers to is in a shared lib. */
1140 h->plt.refcount += 1;
1141 }
1142 }
1143
1144 /* If we are creating a shared library, and this is a reloc
1145 against a global symbol, or a non PC relative reloc
1146 against a local symbol, then we need to copy the reloc
1147 into the shared library. However, if we are linking with
1148 -Bsymbolic, we do not need to copy a reloc against a
1149 global symbol which is defined in an object we are
1150 including in the link (i.e., DEF_REGULAR is set). At
1151 this point we have not seen all the input files, so it is
1152 possible that DEF_REGULAR is not set now but will be set
1153 later (it is never cleared). In case of a weak definition,
1154 DEF_REGULAR may be cleared later by a strong definition in
1155 a shared library. We account for that possibility below by
1156 storing information in the relocs_copied field of the hash
1157 table entry. A similar situation occurs when creating
1158 shared libraries and symbol visibility changes render the
1159 symbol local.
1160
1161 If on the other hand, we are creating an executable, we
1162 may need to keep relocations for symbols satisfied by a
1163 dynamic library if we manage to avoid copy relocs for the
1164 symbol. */
1165 if ((bfd_link_pic (info)
1166 && (sec->flags & SEC_ALLOC) != 0
1167 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1168 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1169 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1170 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1171 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1172 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1173 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1174 || (h != NULL
1175 && (! SYMBOLIC_BIND (info, h)
1176 || h->root.type == bfd_link_hash_defweak
1177 || !h->def_regular))))
1178 || (ELIMINATE_COPY_RELOCS
1179 && !bfd_link_pic (info)
1180 && (sec->flags & SEC_ALLOC) != 0
1181 && h != NULL
1182 && (h->root.type == bfd_link_hash_defweak
1183 || !h->def_regular)))
1184 {
1185 struct elf_dyn_relocs *p;
1186 struct elf_dyn_relocs **head;
1187
1188 /* We must copy these reloc types into the output file.
1189 Create a reloc section in dynobj and make room for
1190 this reloc. */
1191 if (sreloc == NULL)
1192 {
1193 if (htab->elf.dynobj == NULL)
1194 htab->elf.dynobj = abfd;
1195
1196 sreloc = _bfd_elf_make_dynamic_reloc_section
1197 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ true);
1198
1199 if (sreloc == NULL)
1200 return false;
1201 }
1202
1203 /* If this is a global symbol, we count the number of
1204 relocations we need for this symbol. */
1205 if (h != NULL)
1206 {
1207 head = &h->dyn_relocs;
1208 }
1209 else
1210 {
1211 /* Track dynamic relocs needed for local syms too.
1212 We really need local syms available to do this
1213 easily. Oh well. */
1214 asection *s;
1215 void *vpp;
1216
1217 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
1218 abfd, r_symndx);
1219 if (isym == NULL)
1220 return false;
1221
1222 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1223 if (s == NULL)
1224 s = sec;
1225
1226 vpp = &elf_section_data (s)->local_dynrel;
1227 head = (struct elf_dyn_relocs **) vpp;
1228 }
1229
1230 p = *head;
1231 if (p == NULL || p->sec != sec)
1232 {
1233 size_t amt = sizeof *p;
1234 p = ((struct elf_dyn_relocs *)
1235 bfd_alloc (htab->elf.dynobj, amt));
1236 if (p == NULL)
1237 return false;
1238 p->next = *head;
1239 *head = p;
1240 p->sec = sec;
1241 p->count = 0;
1242 p->pc_count = 0;
1243 }
1244
1245 p->count += 1;
1246 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1247 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1248 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1249 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1250 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1251 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1252 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1253 p->pc_count += 1;
1254 }
1255 break;
1256
1257 /* This relocation describes the C++ object vtable hierarchy.
1258 Reconstruct it for later use during GC. */
1259 case R_390_GNU_VTINHERIT:
1260 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1261 return false;
1262 break;
1263
1264 /* This relocation describes which C++ vtable entries are actually
1265 used. Record for later use during GC. */
1266 case R_390_GNU_VTENTRY:
1267 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1268 return false;
1269 break;
1270
1271 default:
1272 break;
1273 }
1274 }
1275
1276 return true;
1277 }
1278
1279 /* Return the section that should be marked against GC for a given
1280 relocation. */
1281
1282 static asection *
1283 elf_s390_gc_mark_hook (asection *sec,
1284 struct bfd_link_info *info,
1285 Elf_Internal_Rela *rel,
1286 struct elf_link_hash_entry *h,
1287 Elf_Internal_Sym *sym)
1288 {
1289 if (h != NULL)
1290 switch (ELF64_R_TYPE (rel->r_info))
1291 {
1292 case R_390_GNU_VTINHERIT:
1293 case R_390_GNU_VTENTRY:
1294 return NULL;
1295 }
1296
1297 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1298 }
1299
1300 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1301 entry but we found we will not create any. Called when we find we will
1302 not have any PLT for this symbol, by for example
1303 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1304 or elf_s390_late_size_sections if no dynamic sections will be
1305 created (we're only linking static objects). */
1306
1307 static void
1308 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1309 {
1310 if (h->elf.root.type == bfd_link_hash_warning)
1311 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1312
1313 if (h->gotplt_refcount <= 0)
1314 return;
1315
1316 /* We simply add the number of gotplt references to the number
1317 * of got references for this symbol. */
1318 h->elf.got.refcount += h->gotplt_refcount;
1319 h->gotplt_refcount = -1;
1320 }
1321
1322 /* Adjust a symbol defined by a dynamic object and referenced by a
1323 regular object. The current definition is in some section of the
1324 dynamic object, but we're not including those sections. We have to
1325 change the definition to something the rest of the link can
1326 understand. */
1327
1328 static bool
1329 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1330 struct elf_link_hash_entry *h)
1331 {
1332 struct elf_s390_link_hash_table *htab;
1333 asection *s, *srel;
1334
1335 /* STT_GNU_IFUNC symbol must go through PLT. */
1336 if (s390_is_ifunc_symbol_p (h))
1337 {
1338 /* All local STT_GNU_IFUNC references must be treated as local
1339 calls via local PLT. */
1340 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1341 {
1342 bfd_size_type pc_count = 0, count = 0;
1343 struct elf_dyn_relocs **pp;
1344 struct elf_dyn_relocs *p;
1345
1346 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1347 {
1348 pc_count += p->pc_count;
1349 p->count -= p->pc_count;
1350 p->pc_count = 0;
1351 count += p->count;
1352 if (p->count == 0)
1353 *pp = p->next;
1354 else
1355 pp = &p->next;
1356 }
1357
1358 if (pc_count || count)
1359 {
1360 h->needs_plt = 1;
1361 h->non_got_ref = 1;
1362 if (h->plt.refcount <= 0)
1363 h->plt.refcount = 1;
1364 else
1365 h->plt.refcount += 1;
1366 }
1367 }
1368
1369 if (h->plt.refcount <= 0)
1370 {
1371 h->plt.offset = (bfd_vma) -1;
1372 h->needs_plt = 0;
1373 }
1374 return true;
1375 }
1376
1377 /* If this is a function, put it in the procedure linkage table. We
1378 will fill in the contents of the procedure linkage table later
1379 (although we could actually do it here). */
1380 if (h->type == STT_FUNC
1381 || h->needs_plt)
1382 {
1383 if (h->plt.refcount <= 0
1384 || SYMBOL_CALLS_LOCAL (info, h)
1385 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1386 {
1387 /* This case can occur if we saw a PLT32 reloc in an input
1388 file, but the symbol was never referred to by a dynamic
1389 object, or if all references were garbage collected. In
1390 such a case, we don't actually need to build a procedure
1391 linkage table, and we can just do a PC32 reloc instead. */
1392 h->plt.offset = (bfd_vma) -1;
1393 h->needs_plt = 0;
1394 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1395 }
1396
1397 return true;
1398 }
1399 else
1400 /* It's possible that we incorrectly decided a .plt reloc was
1401 needed for an R_390_PC32 reloc to a non-function sym in
1402 check_relocs. We can't decide accurately between function and
1403 non-function syms in check-relocs; Objects loaded later in
1404 the link may change h->type. So fix it now. */
1405 h->plt.offset = (bfd_vma) -1;
1406
1407 /* If this is a weak symbol, and there is a real definition, the
1408 processor independent code will have arranged for us to see the
1409 real definition first, and we can just use the same value. */
1410 if (h->is_weakalias)
1411 {
1412 struct elf_link_hash_entry *def = weakdef (h);
1413 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1414 h->root.u.def.section = def->root.u.def.section;
1415 h->root.u.def.value = def->root.u.def.value;
1416 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1417 h->non_got_ref = def->non_got_ref;
1418 return true;
1419 }
1420
1421 /* This is a reference to a symbol defined by a dynamic object which
1422 is not a function. */
1423
1424 /* If we are creating a shared library, we must presume that the
1425 only references to the symbol are via the global offset table.
1426 For such cases we need not do anything here; the relocations will
1427 be handled correctly by relocate_section. */
1428 if (bfd_link_pic (info))
1429 return true;
1430
1431 /* If there are no references to this symbol that do not use the
1432 GOT, we don't need to generate a copy reloc. */
1433 if (!h->non_got_ref)
1434 return true;
1435
1436 /* If -z nocopyreloc was given, we won't generate them either. */
1437 if (info->nocopyreloc)
1438 {
1439 h->non_got_ref = 0;
1440 return true;
1441 }
1442
1443 /* If we don't find any dynamic relocs in read-only sections, then
1444 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1445 if (ELIMINATE_COPY_RELOCS && !_bfd_elf_readonly_dynrelocs (h))
1446 {
1447 h->non_got_ref = 0;
1448 return true;
1449 }
1450
1451 /* We must allocate the symbol in our .dynbss section, which will
1452 become part of the .bss section of the executable. There will be
1453 an entry for this symbol in the .dynsym section. The dynamic
1454 object will contain position independent code, so all references
1455 from the dynamic object to this symbol will go through the global
1456 offset table. The dynamic linker will use the .dynsym entry to
1457 determine the address it must put in the global offset table, so
1458 both the dynamic object and the regular object will refer to the
1459 same memory location for the variable. */
1460
1461 htab = elf_s390_hash_table (info);
1462 if (htab == NULL)
1463 return false;
1464
1465 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1466 copy the initial value out of the dynamic object and into the
1467 runtime process image. */
1468 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1469 {
1470 s = htab->elf.sdynrelro;
1471 srel = htab->elf.sreldynrelro;
1472 }
1473 else
1474 {
1475 s = htab->elf.sdynbss;
1476 srel = htab->elf.srelbss;
1477 }
1478 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1479 {
1480 srel->size += sizeof (Elf64_External_Rela);
1481 h->needs_copy = 1;
1482 }
1483
1484 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1485 }
1486
1487 /* Allocate space in .plt, .got and associated reloc sections for
1488 dynamic relocs. */
1489
1490 static bool
1491 allocate_dynrelocs (struct elf_link_hash_entry *h,
1492 void * inf)
1493 {
1494 struct bfd_link_info *info;
1495 struct elf_s390_link_hash_table *htab;
1496 struct elf_dyn_relocs *p;
1497
1498 if (h->root.type == bfd_link_hash_indirect)
1499 return true;
1500
1501 info = (struct bfd_link_info *) inf;
1502 htab = elf_s390_hash_table (info);
1503 if (htab == NULL)
1504 return false;
1505
1506 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1507 here if it is defined and referenced in a non-shared object. */
1508 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1509 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1510 else if (htab->elf.dynamic_sections_created
1511 && h->plt.refcount > 0)
1512 {
1513 /* Make sure this symbol is output as a dynamic symbol.
1514 Undefined weak syms won't yet be marked as dynamic. */
1515 if (h->dynindx == -1
1516 && !h->forced_local)
1517 {
1518 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1519 return false;
1520 }
1521
1522 if (bfd_link_pic (info)
1523 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1524 {
1525 asection *s = htab->elf.splt;
1526
1527 /* If this is the first .plt entry, make room for the special
1528 first entry. */
1529 if (s->size == 0)
1530 s->size += PLT_FIRST_ENTRY_SIZE;
1531
1532 h->plt.offset = s->size;
1533
1534 /* If this symbol is not defined in a regular file, and we are
1535 not generating a shared library, then set the symbol to this
1536 location in the .plt. This is required to make function
1537 pointers compare as equal between the normal executable and
1538 the shared library. */
1539 if (! bfd_link_pic (info)
1540 && !h->def_regular)
1541 {
1542 h->root.u.def.section = s;
1543 h->root.u.def.value = h->plt.offset;
1544 }
1545
1546 /* Make room for this entry. */
1547 s->size += PLT_ENTRY_SIZE;
1548
1549 /* We also need to make an entry in the .got.plt section. */
1550 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1551
1552 /* We also need to make an entry in the .rela.plt section. */
1553 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1554 }
1555 else
1556 {
1557 h->plt.offset = (bfd_vma) -1;
1558 h->needs_plt = 0;
1559 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1560 }
1561 }
1562 else
1563 {
1564 h->plt.offset = (bfd_vma) -1;
1565 h->needs_plt = 0;
1566 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1567 }
1568
1569 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1570 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1571 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1572 we can save the dynamic TLS relocation. */
1573 if (h->got.refcount > 0
1574 && !bfd_link_dll (info)
1575 && h->dynindx == -1
1576 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1577 {
1578 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1579 /* For the GOTIE access without a literal pool entry the offset has
1580 to be stored somewhere. The immediate value in the instruction
1581 is not bit enough so the value is stored in the got. */
1582 {
1583 h->got.offset = htab->elf.sgot->size;
1584 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1585 }
1586 else
1587 h->got.offset = (bfd_vma) -1;
1588 }
1589 else if (h->got.refcount > 0)
1590 {
1591 asection *s;
1592 bool dyn;
1593 int tls_type = elf_s390_hash_entry(h)->tls_type;
1594
1595 /* Make sure this symbol is output as a dynamic symbol.
1596 Undefined weak syms won't yet be marked as dynamic. */
1597 if (h->dynindx == -1
1598 && !h->forced_local)
1599 {
1600 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1601 return false;
1602 }
1603
1604 s = htab->elf.sgot;
1605 h->got.offset = s->size;
1606 s->size += GOT_ENTRY_SIZE;
1607 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1608 if (tls_type == GOT_TLS_GD)
1609 s->size += GOT_ENTRY_SIZE;
1610 dyn = htab->elf.dynamic_sections_created;
1611 /* R_390_TLS_IE64 needs one dynamic relocation,
1612 R_390_TLS_GD64 needs one if local symbol and two if global. */
1613 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1614 || tls_type >= GOT_TLS_IE)
1615 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1616 else if (tls_type == GOT_TLS_GD)
1617 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1618 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1619 && (bfd_link_pic (info)
1620 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1621 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1622 }
1623 else
1624 h->got.offset = (bfd_vma) -1;
1625
1626 if (h->dyn_relocs == NULL)
1627 return true;
1628
1629 /* In the shared -Bsymbolic case, discard space allocated for
1630 dynamic pc-relative relocs against symbols which turn out to be
1631 defined in regular objects. For the normal shared case, discard
1632 space for pc-relative relocs that have become local due to symbol
1633 visibility changes. */
1634
1635 if (bfd_link_pic (info))
1636 {
1637 if (SYMBOL_CALLS_LOCAL (info, h))
1638 {
1639 struct elf_dyn_relocs **pp;
1640
1641 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1642 {
1643 p->count -= p->pc_count;
1644 p->pc_count = 0;
1645 if (p->count == 0)
1646 *pp = p->next;
1647 else
1648 pp = &p->next;
1649 }
1650 }
1651
1652 /* Also discard relocs on undefined weak syms with non-default
1653 visibility. */
1654 if (h->dyn_relocs != NULL
1655 && h->root.type == bfd_link_hash_undefweak)
1656 {
1657 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1658 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1659 h->dyn_relocs = NULL;
1660
1661 /* Make sure undefined weak symbols are output as a dynamic
1662 symbol in PIEs. */
1663 else if (h->dynindx == -1
1664 && !h->forced_local)
1665 {
1666 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1667 return false;
1668 }
1669 }
1670 }
1671 else if (ELIMINATE_COPY_RELOCS)
1672 {
1673 /* For the non-shared case, discard space for relocs against
1674 symbols which turn out to need copy relocs or are not
1675 dynamic. */
1676
1677 if (!h->non_got_ref
1678 && ((h->def_dynamic
1679 && !h->def_regular)
1680 || (htab->elf.dynamic_sections_created
1681 && (h->root.type == bfd_link_hash_undefweak
1682 || h->root.type == bfd_link_hash_undefined))))
1683 {
1684 /* Make sure this symbol is output as a dynamic symbol.
1685 Undefined weak syms won't yet be marked as dynamic. */
1686 if (h->dynindx == -1
1687 && !h->forced_local)
1688 {
1689 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1690 return false;
1691 }
1692
1693 /* If that succeeded, we know we'll be keeping all the
1694 relocs. */
1695 if (h->dynindx != -1)
1696 goto keep;
1697 }
1698
1699 h->dyn_relocs = NULL;
1700
1701 keep: ;
1702 }
1703
1704 /* Finally, allocate space. */
1705 for (p = h->dyn_relocs; p != NULL; p = p->next)
1706 {
1707 asection *sreloc = elf_section_data (p->sec)->sreloc;
1708 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1709 }
1710
1711 return true;
1712 }
1713
1714 /* Set the sizes of the dynamic sections. */
1715
1716 static bool
1717 elf_s390_late_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1718 struct bfd_link_info *info)
1719 {
1720 struct elf_s390_link_hash_table *htab;
1721 bfd *dynobj;
1722 asection *s;
1723 bool relocs;
1724 bfd *ibfd;
1725
1726 htab = elf_s390_hash_table (info);
1727 if (htab == NULL)
1728 return false;
1729
1730 dynobj = htab->elf.dynobj;
1731 if (dynobj == NULL)
1732 return true;
1733
1734 if (htab->elf.dynamic_sections_created)
1735 {
1736 /* Set the contents of the .interp section to the interpreter. */
1737 if (bfd_link_executable (info) && !info->nointerp)
1738 {
1739 s = bfd_get_linker_section (dynobj, ".interp");
1740 if (s == NULL)
1741 abort ();
1742 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1743 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1744 }
1745 }
1746
1747 if (htab->elf.sgot && s390_gotplt_after_got_p (info))
1748 {
1749 /* _bfd_elf_create_got_section adds the got header size always
1750 to .got.plt but we need it in .got if this section comes
1751 first. */
1752 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
1753 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
1754
1755 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1756 instead of .got.plt. */
1757 htab->elf.hgot->root.u.def.section = htab->elf.sgot;
1758 htab->elf.hgot->root.u.def.value = 0;
1759 }
1760
1761 /* Set up .got offsets for local syms, and space for local dynamic
1762 relocs. */
1763 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1764 {
1765 bfd_signed_vma *local_got;
1766 bfd_signed_vma *end_local_got;
1767 char *local_tls_type;
1768 bfd_size_type locsymcount;
1769 Elf_Internal_Shdr *symtab_hdr;
1770 asection *srela;
1771 struct plt_entry *local_plt;
1772 unsigned int i;
1773
1774 if (! is_s390_elf (ibfd))
1775 continue;
1776
1777 for (s = ibfd->sections; s != NULL; s = s->next)
1778 {
1779 struct elf_dyn_relocs *p;
1780
1781 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1782 {
1783 if (!bfd_is_abs_section (p->sec)
1784 && bfd_is_abs_section (p->sec->output_section))
1785 {
1786 /* Input section has been discarded, either because
1787 it is a copy of a linkonce section or due to
1788 linker script /DISCARD/, so we'll be discarding
1789 the relocs too. */
1790 }
1791 else if (p->count != 0)
1792 {
1793 srela = elf_section_data (p->sec)->sreloc;
1794 srela->size += p->count * sizeof (Elf64_External_Rela);
1795 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1796 info->flags |= DF_TEXTREL;
1797 }
1798 }
1799 }
1800
1801 local_got = elf_local_got_refcounts (ibfd);
1802 if (!local_got)
1803 continue;
1804
1805 symtab_hdr = &elf_symtab_hdr (ibfd);
1806 locsymcount = symtab_hdr->sh_info;
1807 end_local_got = local_got + locsymcount;
1808 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1809 s = htab->elf.sgot;
1810 srela = htab->elf.srelgot;
1811 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1812 {
1813 if (*local_got > 0)
1814 {
1815 *local_got = s->size;
1816 s->size += GOT_ENTRY_SIZE;
1817 if (*local_tls_type == GOT_TLS_GD)
1818 s->size += GOT_ENTRY_SIZE;
1819 if (bfd_link_pic (info))
1820 srela->size += sizeof (Elf64_External_Rela);
1821 }
1822 else
1823 *local_got = (bfd_vma) -1;
1824 }
1825
1826 local_plt = elf_s390_local_plt (ibfd);
1827 for (i = 0; i < symtab_hdr->sh_info; i++)
1828 {
1829 if (local_plt[i].plt.refcount > 0)
1830 {
1831 local_plt[i].plt.offset = htab->elf.iplt->size;
1832 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1833 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1834 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1835 }
1836 else
1837 local_plt[i].plt.offset = (bfd_vma) -1;
1838 }
1839 }
1840
1841 if (htab->tls_ldm_got.refcount > 0)
1842 {
1843 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1844 relocs. */
1845 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1846 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1847 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1848 }
1849 else
1850 htab->tls_ldm_got.offset = -1;
1851
1852 /* Allocate global sym .plt and .got entries, and space for global
1853 sym dynamic relocs. */
1854 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1855
1856 /* We now have determined the sizes of the various dynamic sections.
1857 Allocate memory for them. */
1858 relocs = false;
1859 for (s = dynobj->sections; s != NULL; s = s->next)
1860 {
1861 if ((s->flags & SEC_LINKER_CREATED) == 0)
1862 continue;
1863
1864 if (s == htab->elf.splt
1865 || s == htab->elf.sgot
1866 || s == htab->elf.sgotplt
1867 || s == htab->elf.sdynbss
1868 || s == htab->elf.sdynrelro
1869 || s == htab->elf.iplt
1870 || s == htab->elf.igotplt
1871 || s == htab->irelifunc)
1872 {
1873 /* Strip this section if we don't need it; see the
1874 comment below. */
1875 }
1876 else if (startswith (bfd_section_name (s), ".rela"))
1877 {
1878 if (s->size != 0 && s != htab->elf.srelplt)
1879 {
1880 relocs = true;
1881 if (s == htab->elf.irelplt)
1882 {
1883 /* In static-pie case, there are IRELATIVE-relocs in
1884 .rela.iplt (htab->irelplt), which will later be grouped
1885 to .rela.plt. On s390, the IRELATIVE relocations are
1886 always located in .rela.iplt - even for non-static case.
1887 Ensure that DT_JMPREL, DT_PLTRELA, DT_PLTRELASZ is added
1888 to the dynamic section even if htab->srelplt->size == 0.
1889 See _bfd_elf_add_dynamic_tags in bfd/elflink.c. */
1890 htab->elf.dt_jmprel_required = true;
1891 }
1892 }
1893
1894 /* We use the reloc_count field as a counter if we need
1895 to copy relocs into the output file. */
1896 s->reloc_count = 0;
1897 }
1898 else
1899 {
1900 /* It's not one of our sections, so don't allocate space. */
1901 continue;
1902 }
1903
1904 if (s->size == 0)
1905 {
1906 /* If we don't need this section, strip it from the
1907 output file. This is to handle .rela.bss and
1908 .rela.plt. We must create it in
1909 create_dynamic_sections, because it must be created
1910 before the linker maps input sections to output
1911 sections. The linker does that before
1912 adjust_dynamic_symbol is called, and it is that
1913 function which decides whether anything needs to go
1914 into these sections. */
1915
1916 s->flags |= SEC_EXCLUDE;
1917 continue;
1918 }
1919
1920 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1921 continue;
1922
1923 /* Allocate memory for the section contents. We use bfd_zalloc
1924 here in case unused entries are not reclaimed before the
1925 section's contents are written out. This should not happen,
1926 but this way if it does, we get a R_390_NONE reloc instead
1927 of garbage. */
1928 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1929 if (s->contents == NULL)
1930 return false;
1931 }
1932
1933 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
1934 }
1935
1936 /* Return the base VMA address which should be subtracted from real addresses
1937 when resolving @dtpoff relocation.
1938 This is PT_TLS segment p_vaddr. */
1939
1940 static bfd_vma
1941 dtpoff_base (struct bfd_link_info *info)
1942 {
1943 /* If tls_sec is NULL, we should have signalled an error already. */
1944 if (elf_hash_table (info)->tls_sec == NULL)
1945 return 0;
1946 return elf_hash_table (info)->tls_sec->vma;
1947 }
1948
1949 /* Return the relocation value for @tpoff relocation
1950 if STT_TLS virtual address is ADDRESS. */
1951
1952 static bfd_vma
1953 tpoff (struct bfd_link_info *info, bfd_vma address)
1954 {
1955 struct elf_link_hash_table *htab = elf_hash_table (info);
1956
1957 /* If tls_sec is NULL, we should have signalled an error already. */
1958 if (htab->tls_sec == NULL)
1959 return 0;
1960 return htab->tls_size + htab->tls_sec->vma - address;
1961 }
1962
1963 /* Complain if TLS instruction relocation is against an invalid
1964 instruction. */
1965
1966 static void
1967 invalid_tls_insn (bfd *input_bfd,
1968 asection *input_section,
1969 Elf_Internal_Rela *rel)
1970 {
1971 reloc_howto_type *howto;
1972
1973 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
1974 _bfd_error_handler
1975 /* xgettext:c-format */
1976 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
1977 input_bfd,
1978 input_section,
1979 (uint64_t) rel->r_offset,
1980 howto->name);
1981 bfd_set_error (bfd_error_bad_value);
1982 }
1983
1984 /* Relocate a 390 ELF section. */
1985
1986 static int
1987 elf_s390_relocate_section (bfd *output_bfd,
1988 struct bfd_link_info *info,
1989 bfd *input_bfd,
1990 asection *input_section,
1991 bfd_byte *contents,
1992 Elf_Internal_Rela *relocs,
1993 Elf_Internal_Sym *local_syms,
1994 asection **local_sections)
1995 {
1996 struct elf_s390_link_hash_table *htab;
1997 Elf_Internal_Shdr *symtab_hdr;
1998 struct elf_link_hash_entry **sym_hashes;
1999 bfd_vma *local_got_offsets;
2000 Elf_Internal_Rela *rel;
2001 Elf_Internal_Rela *relend;
2002
2003 if (!is_s390_elf (input_bfd))
2004 {
2005 bfd_set_error (bfd_error_wrong_format);
2006 return false;
2007 }
2008
2009 htab = elf_s390_hash_table (info);
2010 if (htab == NULL)
2011 return false;
2012
2013 symtab_hdr = &elf_symtab_hdr (input_bfd);
2014 sym_hashes = elf_sym_hashes (input_bfd);
2015 local_got_offsets = elf_local_got_offsets (input_bfd);
2016
2017 rel = relocs;
2018 relend = relocs + input_section->reloc_count;
2019 for (; rel < relend; rel++)
2020 {
2021 unsigned int r_type;
2022 reloc_howto_type *howto;
2023 unsigned long r_symndx;
2024 struct elf_link_hash_entry *h;
2025 Elf_Internal_Sym *sym;
2026 asection *sec;
2027 bfd_vma off;
2028 bfd_vma relocation;
2029 bool unresolved_reloc;
2030 bfd_reloc_status_type r;
2031 int tls_type;
2032 bool resolved_to_zero;
2033
2034 r_type = ELF64_R_TYPE (rel->r_info);
2035 if (r_type == (int) R_390_GNU_VTINHERIT
2036 || r_type == (int) R_390_GNU_VTENTRY)
2037 continue;
2038 if (r_type >= (int) R_390_max)
2039 {
2040 bfd_set_error (bfd_error_bad_value);
2041 return false;
2042 }
2043
2044 howto = elf_howto_table + r_type;
2045 r_symndx = ELF64_R_SYM (rel->r_info);
2046
2047 h = NULL;
2048 sym = NULL;
2049 sec = NULL;
2050 unresolved_reloc = false;
2051 if (r_symndx < symtab_hdr->sh_info)
2052 {
2053 sym = local_syms + r_symndx;
2054 sec = local_sections[r_symndx];
2055
2056 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2057 {
2058 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2059 if (local_plt == NULL)
2060 return false;
2061
2062 /* Address of the PLT slot. */
2063 relocation = (htab->elf.iplt->output_section->vma
2064 + htab->elf.iplt->output_offset
2065 + local_plt[r_symndx].plt.offset);
2066
2067 switch (r_type)
2068 {
2069 case R_390_PLTOFF16:
2070 case R_390_PLTOFF32:
2071 case R_390_PLTOFF64:
2072 relocation -= s390_got_pointer (info);
2073 break;
2074 case R_390_GOTPLT12:
2075 case R_390_GOTPLT16:
2076 case R_390_GOTPLT20:
2077 case R_390_GOTPLT32:
2078 case R_390_GOTPLT64:
2079 case R_390_GOTPLTENT:
2080 case R_390_GOT12:
2081 case R_390_GOT16:
2082 case R_390_GOT20:
2083 case R_390_GOT32:
2084 case R_390_GOT64:
2085 case R_390_GOTENT:
2086 {
2087 /* Write the PLT slot address into the GOT slot. */
2088 bfd_put_64 (output_bfd, relocation,
2089 htab->elf.sgot->contents +
2090 local_got_offsets[r_symndx]);
2091 relocation = (local_got_offsets[r_symndx] +
2092 s390_got_offset (info));
2093
2094 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2095 relocation += s390_got_pointer (info);
2096 break;
2097 }
2098 default:
2099 break;
2100 }
2101 /* The output section is needed later in
2102 finish_dynamic_section when creating the dynamic
2103 relocation. */
2104 local_plt[r_symndx].sec = sec;
2105 goto do_relocation;
2106 }
2107 else
2108 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2109 }
2110 else
2111 {
2112 bool warned ATTRIBUTE_UNUSED;
2113 bool ignored ATTRIBUTE_UNUSED;
2114
2115 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2116 r_symndx, symtab_hdr, sym_hashes,
2117 h, sec, relocation,
2118 unresolved_reloc, warned, ignored);
2119 }
2120
2121 if (sec != NULL && discarded_section (sec))
2122 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2123 rel, 1, relend, howto, 0, contents);
2124
2125 if (bfd_link_relocatable (info))
2126 continue;
2127
2128 resolved_to_zero = (h != NULL
2129 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2130
2131 switch (r_type)
2132 {
2133 case R_390_GOTPLT12:
2134 case R_390_GOTPLT16:
2135 case R_390_GOTPLT20:
2136 case R_390_GOTPLT32:
2137 case R_390_GOTPLT64:
2138 case R_390_GOTPLTENT:
2139 /* There are three cases for a GOTPLT relocation. 1) The
2140 relocation is against the jump slot entry of a plt that
2141 will get emitted to the output file. 2) The relocation
2142 is against the jump slot of a plt entry that has been
2143 removed. elf_s390_adjust_gotplt has created a GOT entry
2144 as replacement. 3) The relocation is against a local symbol.
2145 Cases 2) and 3) are the same as the GOT relocation code
2146 so we just have to test for case 1 and fall through for
2147 the other two. */
2148 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2149 {
2150 bfd_vma plt_index;
2151
2152 if (s390_is_ifunc_symbol_p (h))
2153 {
2154 /* Entry indices of .iplt and .igot.plt match
2155 1:1. No magic PLT first entry here. */
2156 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2157 relocation = (plt_index * GOT_ENTRY_SIZE
2158 + s390_gotplt_offset (info)
2159 + htab->elf.igotplt->output_offset);
2160 }
2161 else
2162 {
2163 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
2164 / PLT_ENTRY_SIZE);
2165
2166 relocation = (plt_index * GOT_ENTRY_SIZE
2167 + s390_gotplt_offset (info));
2168 }
2169 if (r_type == R_390_GOTPLTENT)
2170 relocation += s390_got_pointer (info);
2171 unresolved_reloc = false;
2172 break;
2173 }
2174 /* Fall through. */
2175
2176 case R_390_GOT12:
2177 case R_390_GOT16:
2178 case R_390_GOT20:
2179 case R_390_GOT32:
2180 case R_390_GOT64:
2181 case R_390_GOTENT:
2182 /* Relocation is to the entry for this symbol in the global
2183 offset table. */
2184 if (htab->elf.sgot == NULL)
2185 abort ();
2186
2187 if (h != NULL)
2188 {
2189 bool dyn;
2190
2191 off = h->got.offset;
2192 dyn = htab->elf.dynamic_sections_created;
2193
2194 if (s390_is_ifunc_symbol_p (h))
2195 {
2196 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2197 if (off == (bfd_vma)-1)
2198 {
2199 /* No explicit GOT usage so redirect to the
2200 got.iplt slot. */
2201 relocation = (s390_gotplt_offset (info)
2202 + htab->elf.igotplt->output_offset
2203 + (h->plt.offset / PLT_ENTRY_SIZE
2204 * GOT_ENTRY_SIZE));
2205
2206 /* For @GOTENT the relocation is against the offset between
2207 the instruction and the symbols entry in the GOT and not
2208 between the start of the GOT and the symbols entry. We
2209 add the vma of the GOT to get the correct value. */
2210 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2211 relocation += s390_got_pointer (info);
2212
2213 break;
2214 }
2215 else
2216 {
2217 /* Explicit GOT slots must contain the address
2218 of the PLT slot. This will be handled in
2219 finish_dynamic_symbol. */
2220 }
2221 }
2222 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2223 bfd_link_pic (info),
2224 h)
2225 || SYMBOL_REFERENCES_LOCAL (info, h)
2226 || resolved_to_zero)
2227 {
2228 Elf_Internal_Sym *isym;
2229 asection *sym_sec;
2230
2231 /* This is actually a static link, or it is a
2232 -Bsymbolic link and the symbol is defined
2233 locally, or the symbol was forced to be local
2234 because of a version file. We must initialize
2235 this entry in the global offset table. Since the
2236 offset must always be a multiple of 2, we use the
2237 least significant bit to record whether we have
2238 initialized it already.
2239
2240 When doing a dynamic link, we create a .rel.got
2241 relocation entry to initialize the value. This
2242 is done in the finish_dynamic_symbol routine. */
2243 if ((off & 1) != 0)
2244 off &= ~1;
2245 else
2246 {
2247 bfd_put_64 (output_bfd, relocation,
2248 htab->elf.sgot->contents + off);
2249 h->got.offset |= 1;
2250 }
2251
2252 /* When turning a GOT slot dereference into a direct
2253 reference using larl we have to make sure that
2254 the symbol is 1. properly aligned and 2. it is no
2255 ABS symbol or will become one. */
2256 if (h->def_regular
2257 && SYMBOL_REFERENCES_LOCAL (info, h)
2258 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2259 && ((r_type == R_390_GOTENT
2260 && (bfd_get_16 (input_bfd,
2261 contents + rel->r_offset - 2)
2262 & 0xff0f) == 0xc408)
2263 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2264 || (r_type == R_390_GOT20
2265 && (bfd_get_32 (input_bfd,
2266 contents + rel->r_offset - 2)
2267 & 0xff00f000) == 0xe300c000
2268 && bfd_get_8 (input_bfd,
2269 contents + rel->r_offset + 3) == 0x04))
2270 && (isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
2271 input_bfd, r_symndx))
2272 && isym->st_shndx != SHN_ABS
2273 && h != htab->elf.hdynamic
2274 && h != htab->elf.hgot
2275 && h != htab->elf.hplt
2276 && !(isym->st_value & 1)
2277 && (sym_sec = bfd_section_from_elf_index (input_bfd,
2278 isym->st_shndx))
2279 && sym_sec->alignment_power)
2280 {
2281 unsigned short new_insn =
2282 (0xc000 | (bfd_get_8 (input_bfd,
2283 contents + rel->r_offset - 1) & 0xf0));
2284 bfd_put_16 (output_bfd, new_insn,
2285 contents + rel->r_offset - 2);
2286 r_type = R_390_PC32DBL;
2287 rel->r_addend = 2;
2288 howto = elf_howto_table + r_type;
2289 relocation = h->root.u.def.value
2290 + h->root.u.def.section->output_section->vma
2291 + h->root.u.def.section->output_offset;
2292 goto do_relocation;
2293 }
2294 }
2295 else
2296 unresolved_reloc = false;
2297 }
2298 else
2299 {
2300 if (local_got_offsets == NULL)
2301 abort ();
2302
2303 off = local_got_offsets[r_symndx];
2304
2305 /* The offset must always be a multiple of 8. We use
2306 the least significant bit to record whether we have
2307 already generated the necessary reloc. */
2308 if ((off & 1) != 0)
2309 off &= ~1;
2310 else
2311 {
2312 bfd_put_64 (output_bfd, relocation,
2313 htab->elf.sgot->contents + off);
2314
2315 if (bfd_link_pic (info))
2316 {
2317 asection *s;
2318 Elf_Internal_Rela outrel;
2319 bfd_byte *loc;
2320
2321 s = htab->elf.srelgot;
2322 if (s == NULL)
2323 abort ();
2324
2325 outrel.r_offset = (htab->elf.sgot->output_section->vma
2326 + htab->elf.sgot->output_offset
2327 + off);
2328 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2329 outrel.r_addend = relocation;
2330 loc = s->contents;
2331 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2332 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2333 }
2334
2335 local_got_offsets[r_symndx] |= 1;
2336 }
2337 }
2338
2339 if (off >= (bfd_vma) -2)
2340 abort ();
2341
2342 relocation = s390_got_offset (info) + off;
2343
2344 /* For @GOTENT the relocation is against the offset between
2345 the instruction and the symbols entry in the GOT and not
2346 between the start of the GOT and the symbols entry. We
2347 add the vma of the GOT to get the correct value. */
2348 if ( r_type == R_390_GOTENT
2349 || r_type == R_390_GOTPLTENT)
2350 relocation += s390_got_pointer (info);
2351
2352 break;
2353
2354 case R_390_GOTOFF16:
2355 case R_390_GOTOFF32:
2356 case R_390_GOTOFF64:
2357 /* Relocation is relative to the start of the global offset
2358 table. */
2359
2360 if (h != NULL
2361 && s390_is_ifunc_symbol_p (h)
2362 && h->def_regular
2363 && !bfd_link_executable (info))
2364 {
2365 relocation = (htab->elf.iplt->output_section->vma
2366 + htab->elf.iplt->output_offset
2367 + h->plt.offset
2368 - s390_got_pointer (info));
2369 goto do_relocation;
2370 }
2371
2372 relocation -= s390_got_pointer (info);
2373 break;
2374
2375 case R_390_GOTPC:
2376 case R_390_GOTPCDBL:
2377 /* Use global offset table as symbol value. */
2378 relocation = s390_got_pointer (info);
2379 unresolved_reloc = false;
2380 break;
2381
2382 case R_390_PLT12DBL:
2383 case R_390_PLT16DBL:
2384 case R_390_PLT24DBL:
2385 case R_390_PLT32:
2386 case R_390_PLT32DBL:
2387 case R_390_PLT64:
2388 /* Relocation is to the entry for this symbol in the
2389 procedure linkage table. */
2390
2391 /* Resolve a PLT32 reloc against a local symbol directly,
2392 without using the procedure linkage table. */
2393 if (h == NULL)
2394 break;
2395
2396 if (h->plt.offset == (bfd_vma) -1
2397 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2398 {
2399 /* We didn't make a PLT entry for this symbol. This
2400 happens when statically linking PIC code, or when
2401 using -Bsymbolic. */
2402
2403 /* Replace relative long addressing instructions of weak
2404 symbols, which will definitely resolve to zero, with
2405 either a load address of 0 or a trapping insn.
2406 This prevents the PLT32DBL relocation from overflowing in
2407 case the binary will be loaded at 4GB or more. */
2408 if (h->root.type == bfd_link_hash_undefweak
2409 && !h->root.linker_def
2410 && (bfd_link_executable (info)
2411 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2412 && r_type == R_390_PLT32DBL
2413 && rel->r_offset >= 2)
2414 {
2415 void *insn_start = contents + rel->r_offset - 2;
2416 uint16_t op = bfd_get_16 (input_bfd, insn_start) & 0xff0f;
2417 uint8_t reg = bfd_get_8 (input_bfd, insn_start + 1) & 0xf0;
2418
2419 /* NOTE: The order of the if's is important! */
2420 /* Replace load address relative long (larl) with load
2421 address (lay) */
2422 if (op == 0xc000)
2423 {
2424 /* larl rX,<weak sym> -> lay rX,0(0) */
2425 bfd_put_16 (output_bfd, 0xe300 | reg, insn_start);
2426 bfd_put_32 (output_bfd, 0x71, insn_start + 2);
2427 continue;
2428 }
2429 /* Replace branch relative and save long (brasl) with a trap. */
2430 else if (op == 0xc005)
2431 {
2432 /* brasl rX,<weak sym> -> jg .+2 (6-byte trap) */
2433 bfd_put_16 (output_bfd, 0xc0f4, insn_start);
2434 bfd_put_32 (output_bfd, 0x1, insn_start + 2);
2435 continue;
2436 }
2437 }
2438
2439 break;
2440 }
2441 if (s390_is_ifunc_symbol_p (h))
2442 relocation = (htab->elf.iplt->output_section->vma
2443 + htab->elf.iplt->output_offset
2444 + h->plt.offset);
2445 else
2446 relocation = (htab->elf.splt->output_section->vma
2447 + htab->elf.splt->output_offset
2448 + h->plt.offset);
2449 unresolved_reloc = false;
2450 break;
2451
2452 case R_390_PLTOFF16:
2453 case R_390_PLTOFF32:
2454 case R_390_PLTOFF64:
2455 /* Relocation is to the entry for this symbol in the
2456 procedure linkage table relative to the start of the GOT. */
2457
2458 /* For local symbols or if we didn't make a PLT entry for
2459 this symbol resolve the symbol directly. */
2460 if (h == NULL
2461 || h->plt.offset == (bfd_vma) -1
2462 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2463 {
2464 relocation -= s390_got_pointer (info);
2465 break;
2466 }
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 - s390_got_pointer (info));
2473 else
2474 relocation = (htab->elf.splt->output_section->vma
2475 + htab->elf.splt->output_offset
2476 + h->plt.offset
2477 - s390_got_pointer (info));
2478 unresolved_reloc = false;
2479 break;
2480
2481 case R_390_PC16:
2482 case R_390_PC12DBL:
2483 case R_390_PC16DBL:
2484 case R_390_PC24DBL:
2485 case R_390_PC32:
2486 case R_390_PC32DBL:
2487 case R_390_PC64:
2488 if (h != NULL
2489 && bfd_link_pie (info)
2490 && !h->def_regular)
2491 {
2492 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2493 "in shared library and accessed "
2494 "from executable "
2495 "(rebuild file with -fPIC ?)"),
2496 input_bfd, h->root.root.string);
2497 bfd_set_error (bfd_error_bad_value);
2498 return false;
2499 }
2500 /* The target of these relocs are instruction operands
2501 residing in read-only sections. We cannot emit a runtime
2502 reloc for it. */
2503 if (h != NULL
2504 && s390_is_ifunc_symbol_p (h)
2505 && h->def_regular
2506 && bfd_link_pic (info))
2507 {
2508 relocation = (htab->elf.iplt->output_section->vma
2509 + htab->elf.iplt->output_offset
2510 + h->plt.offset);
2511 goto do_relocation;
2512 }
2513
2514 /* Replace relative long addressing instructions of weak
2515 symbols, which will definitely resolve to zero, with
2516 either a load address of 0, a NOP, or a trapping insn.
2517 This prevents the PC32DBL relocation from overflowing in
2518 case the binary will be loaded at 4GB or more. */
2519 if (h != NULL
2520 && h->root.type == bfd_link_hash_undefweak
2521 && !h->root.linker_def
2522 && (bfd_link_executable (info)
2523 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2524 && r_type == R_390_PC32DBL
2525 && rel->r_offset >= 2)
2526 {
2527 void *insn_start = contents + rel->r_offset - 2;
2528 uint16_t op = bfd_get_16 (input_bfd, insn_start) & 0xff0f;
2529 uint8_t reg = bfd_get_8 (input_bfd, insn_start + 1) & 0xf0;
2530
2531 /* NOTE: The order of the if's is important! */
2532 /* Replace load address relative long (larl) with load
2533 address (lay) */
2534 if (op == 0xc000)
2535 {
2536 /* larl rX,<weak sym> -> lay rX,0(0) */
2537 bfd_put_16 (output_bfd, 0xe300 | reg, insn_start);
2538 bfd_put_32 (output_bfd, 0x71, insn_start + 2);
2539 continue;
2540 }
2541 /* Replace prefetch data relative long (pfdrl) with a NOP */
2542 else if (op == 0xc602)
2543 {
2544 /* Emit a 6-byte NOP: jgnop . */
2545 bfd_put_16 (output_bfd, 0xc004, insn_start);
2546 bfd_put_32 (output_bfd, 0x0, insn_start + 2);
2547 continue;
2548 }
2549 /* Replace the following instructions with a trap:
2550 - branch relative and save long (brasl)
2551 - load (logical) relative long (lrl, lgrl, lgfrl, llgfrl)
2552 - load (logical) halfword relative long (lhrl, lghrl, llhrl, llghrl)
2553 - store relative long (strl, stgrl)
2554 - store halfword relative long (sthrl)
2555 - execute relative long (exrl)
2556 - compare (logical) relative long (crl, clrl, cgrl, clgrl, cgfrl, clgfrl)
2557 - compare (logical) halfword relative long (chrl, cghrl, clhrl, clghrl) */
2558 else if (op == 0xc005 || (op & 0xff00) == 0xc400
2559 || (op & 0xff00) == 0xc600)
2560 {
2561 /* Emit a 6-byte trap: jg .+2 */
2562 bfd_put_16 (output_bfd, 0xc0f4, insn_start);
2563 bfd_put_32 (output_bfd, 0x1, insn_start + 2);
2564 continue;
2565 }
2566 }
2567 /* Fall through. */
2568
2569 case R_390_8:
2570 case R_390_16:
2571 case R_390_32:
2572 case R_390_64:
2573
2574 if ((input_section->flags & SEC_ALLOC) == 0)
2575 break;
2576
2577 if (h != NULL
2578 && s390_is_ifunc_symbol_p (h)
2579 && h->def_regular)
2580 {
2581 if (!bfd_link_pic (info))
2582 {
2583 /* For a non-shared object the symbol will not
2584 change. Hence we can write the address of the
2585 target IPLT slot now. */
2586 relocation = (htab->elf.iplt->output_section->vma
2587 + htab->elf.iplt->output_offset
2588 + h ->plt.offset);
2589 goto do_relocation;
2590 }
2591 else
2592 {
2593 /* For shared objects a runtime relocation is needed. */
2594
2595 Elf_Internal_Rela outrel;
2596 asection *sreloc;
2597
2598 /* Need a dynamic relocation to get the real function
2599 address. */
2600 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2601 info,
2602 input_section,
2603 rel->r_offset);
2604 if (outrel.r_offset == (bfd_vma) -1
2605 || outrel.r_offset == (bfd_vma) -2)
2606 abort ();
2607
2608 outrel.r_offset += (input_section->output_section->vma
2609 + input_section->output_offset);
2610
2611 if (h->dynindx == -1
2612 || h->forced_local
2613 || bfd_link_executable (info))
2614 {
2615 /* This symbol is resolved locally. */
2616 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2617 outrel.r_addend = (h->root.u.def.value
2618 + h->root.u.def.section->output_section->vma
2619 + h->root.u.def.section->output_offset);
2620 }
2621 else
2622 {
2623 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2624 outrel.r_addend = 0;
2625 }
2626
2627 sreloc = htab->elf.irelifunc;
2628 elf_append_rela (output_bfd, sreloc, &outrel);
2629
2630 /* If this reloc is against an external symbol, we
2631 do not want to fiddle with the addend. Otherwise,
2632 we need to include the symbol value so that it
2633 becomes an addend for the dynamic reloc. For an
2634 internal symbol, we have updated addend. */
2635 continue;
2636 }
2637 }
2638
2639 if ((bfd_link_pic (info)
2640 && (h == NULL
2641 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2642 && !resolved_to_zero)
2643 || h->root.type != bfd_link_hash_undefweak)
2644 && ((r_type != R_390_PC16
2645 && r_type != R_390_PC12DBL
2646 && r_type != R_390_PC16DBL
2647 && r_type != R_390_PC24DBL
2648 && r_type != R_390_PC32
2649 && r_type != R_390_PC32DBL
2650 && r_type != R_390_PC64)
2651 || !SYMBOL_CALLS_LOCAL (info, h)))
2652 || (ELIMINATE_COPY_RELOCS
2653 && !bfd_link_pic (info)
2654 && h != NULL
2655 && h->dynindx != -1
2656 && !h->non_got_ref
2657 && ((h->def_dynamic
2658 && !h->def_regular)
2659 || h->root.type == bfd_link_hash_undefweak
2660 || h->root.type == bfd_link_hash_undefined)))
2661 {
2662 Elf_Internal_Rela outrel;
2663 bool skip, relocate;
2664 asection *sreloc;
2665 bfd_byte *loc;
2666
2667 /* When generating a shared object, these relocations
2668 are copied into the output file to be resolved at run
2669 time. */
2670 skip = false;
2671 relocate = false;
2672
2673 outrel.r_offset =
2674 _bfd_elf_section_offset (output_bfd, info, input_section,
2675 rel->r_offset);
2676 if (outrel.r_offset == (bfd_vma) -1)
2677 skip = true;
2678 else if (outrel.r_offset == (bfd_vma) -2)
2679 skip = true, relocate = true;
2680
2681 outrel.r_offset += (input_section->output_section->vma
2682 + input_section->output_offset);
2683
2684 if (skip)
2685 memset (&outrel, 0, sizeof outrel);
2686 else if (h != NULL
2687 && h->dynindx != -1
2688 && (r_type == R_390_PC16
2689 || r_type == R_390_PC12DBL
2690 || r_type == R_390_PC16DBL
2691 || r_type == R_390_PC24DBL
2692 || r_type == R_390_PC32
2693 || r_type == R_390_PC32DBL
2694 || r_type == R_390_PC64
2695 || !bfd_link_pic (info)
2696 || !SYMBOLIC_BIND (info, h)
2697 || !h->def_regular))
2698 {
2699 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2700 outrel.r_addend = rel->r_addend;
2701 }
2702 else
2703 {
2704 /* This symbol is local, or marked to become local. */
2705 outrel.r_addend = relocation + rel->r_addend;
2706 if (r_type == R_390_64)
2707 {
2708 relocate = true;
2709 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2710 }
2711 else
2712 {
2713 long sindx;
2714
2715 if (bfd_is_abs_section (sec))
2716 sindx = 0;
2717 else if (sec == NULL || sec->owner == NULL)
2718 {
2719 bfd_set_error(bfd_error_bad_value);
2720 return false;
2721 }
2722 else
2723 {
2724 asection *osec;
2725
2726 osec = sec->output_section;
2727 sindx = elf_section_data (osec)->dynindx;
2728
2729 if (sindx == 0)
2730 {
2731 osec = htab->elf.text_index_section;
2732 sindx = elf_section_data (osec)->dynindx;
2733 }
2734 BFD_ASSERT (sindx != 0);
2735
2736 /* We are turning this relocation into one
2737 against a section symbol, so subtract out
2738 the output section's address but not the
2739 offset of the input section in the output
2740 section. */
2741 outrel.r_addend -= osec->vma;
2742 }
2743 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2744 }
2745 }
2746
2747 sreloc = elf_section_data (input_section)->sreloc;
2748 if (sreloc == NULL)
2749 abort ();
2750
2751 loc = sreloc->contents;
2752 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2753 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2754
2755 /* If this reloc is against an external symbol, we do
2756 not want to fiddle with the addend. Otherwise, we
2757 need to include the symbol value so that it becomes
2758 an addend for the dynamic reloc. */
2759 if (! relocate)
2760 continue;
2761 }
2762
2763 break;
2764
2765 /* Relocations for tls literal pool entries. */
2766 case R_390_TLS_IE64:
2767 if (bfd_link_dll (info))
2768 {
2769 Elf_Internal_Rela outrel;
2770 asection *sreloc;
2771 bfd_byte *loc;
2772
2773 outrel.r_offset = rel->r_offset
2774 + input_section->output_section->vma
2775 + input_section->output_offset;
2776 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2777 sreloc = elf_section_data (input_section)->sreloc;
2778 if (sreloc == NULL)
2779 abort ();
2780 loc = sreloc->contents;
2781 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2782 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2783 }
2784 /* Fall through. */
2785
2786 case R_390_TLS_GD64:
2787 case R_390_TLS_GOTIE64:
2788 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2789 tls_type = GOT_UNKNOWN;
2790 if (h == NULL && local_got_offsets)
2791 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2792 else if (h != NULL)
2793 {
2794 tls_type = elf_s390_hash_entry(h)->tls_type;
2795 if (!bfd_link_dll (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2796 r_type = R_390_TLS_LE64;
2797 }
2798 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2799 r_type = R_390_TLS_IE64;
2800
2801 if (r_type == R_390_TLS_LE64)
2802 {
2803 /* This relocation gets optimized away by the local exec
2804 access optimization. */
2805 BFD_ASSERT (! unresolved_reloc);
2806 bfd_put_64 (output_bfd, -tpoff (info, relocation) + rel->r_addend,
2807 contents + rel->r_offset);
2808 continue;
2809 }
2810
2811 if (htab->elf.sgot == NULL)
2812 abort ();
2813
2814 if (h != NULL)
2815 off = h->got.offset;
2816 else
2817 {
2818 if (local_got_offsets == NULL)
2819 abort ();
2820
2821 off = local_got_offsets[r_symndx];
2822 }
2823
2824 emit_tls_relocs:
2825
2826 if ((off & 1) != 0)
2827 off &= ~1;
2828 else
2829 {
2830 Elf_Internal_Rela outrel;
2831 bfd_byte *loc;
2832 int dr_type, indx;
2833
2834 if (htab->elf.srelgot == NULL)
2835 abort ();
2836
2837 outrel.r_offset = (htab->elf.sgot->output_section->vma
2838 + htab->elf.sgot->output_offset + off);
2839
2840 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2841 if (r_type == R_390_TLS_GD64)
2842 dr_type = R_390_TLS_DTPMOD;
2843 else
2844 dr_type = R_390_TLS_TPOFF;
2845 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2846 outrel.r_addend = relocation - dtpoff_base (info);
2847 else
2848 outrel.r_addend = 0;
2849 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2850 loc = htab->elf.srelgot->contents;
2851 loc += htab->elf.srelgot->reloc_count++
2852 * sizeof (Elf64_External_Rela);
2853 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2854
2855 if (r_type == R_390_TLS_GD64)
2856 {
2857 if (indx == 0)
2858 {
2859 BFD_ASSERT (! unresolved_reloc);
2860 bfd_put_64 (output_bfd,
2861 relocation - dtpoff_base (info),
2862 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2863 }
2864 else
2865 {
2866 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2867 outrel.r_offset += GOT_ENTRY_SIZE;
2868 outrel.r_addend = 0;
2869 htab->elf.srelgot->reloc_count++;
2870 loc += sizeof (Elf64_External_Rela);
2871 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2872 }
2873 }
2874
2875 if (h != NULL)
2876 h->got.offset |= 1;
2877 else
2878 local_got_offsets[r_symndx] |= 1;
2879 }
2880
2881 if (off >= (bfd_vma) -2)
2882 abort ();
2883 if (r_type == ELF64_R_TYPE (rel->r_info))
2884 {
2885 relocation = htab->elf.sgot->output_offset + off;
2886 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2887 relocation += htab->elf.sgot->output_section->vma;
2888 unresolved_reloc = false;
2889 }
2890 else
2891 {
2892 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2893 contents + rel->r_offset);
2894 continue;
2895 }
2896 break;
2897
2898 case R_390_TLS_GOTIE12:
2899 case R_390_TLS_GOTIE20:
2900 case R_390_TLS_IEENT:
2901 if (h == NULL)
2902 {
2903 if (local_got_offsets == NULL)
2904 abort();
2905 off = local_got_offsets[r_symndx];
2906 if (bfd_link_dll (info))
2907 goto emit_tls_relocs;
2908 }
2909 else
2910 {
2911 off = h->got.offset;
2912 tls_type = elf_s390_hash_entry(h)->tls_type;
2913 if (bfd_link_dll (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2914 goto emit_tls_relocs;
2915 }
2916
2917 if (htab->elf.sgot == NULL)
2918 abort ();
2919
2920 BFD_ASSERT (! unresolved_reloc);
2921 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2922 htab->elf.sgot->contents + off);
2923 relocation = htab->elf.sgot->output_offset + off;
2924 if (r_type == R_390_TLS_IEENT)
2925 relocation += htab->elf.sgot->output_section->vma;
2926 unresolved_reloc = false;
2927 break;
2928
2929 case R_390_TLS_LDM64:
2930 if (! bfd_link_dll (info))
2931 /* The literal pool entry this relocation refers to gets ignored
2932 by the optimized code of the local exec model. Do nothing
2933 and the value will turn out zero. */
2934 continue;
2935
2936 if (htab->elf.sgot == NULL)
2937 abort ();
2938
2939 off = htab->tls_ldm_got.offset;
2940 if (off & 1)
2941 off &= ~1;
2942 else
2943 {
2944 Elf_Internal_Rela outrel;
2945 bfd_byte *loc;
2946
2947 if (htab->elf.srelgot == NULL)
2948 abort ();
2949
2950 outrel.r_offset = (htab->elf.sgot->output_section->vma
2951 + htab->elf.sgot->output_offset + off);
2952
2953 bfd_put_64 (output_bfd, 0,
2954 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2955 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2956 outrel.r_addend = 0;
2957 loc = htab->elf.srelgot->contents;
2958 loc += htab->elf.srelgot->reloc_count++
2959 * sizeof (Elf64_External_Rela);
2960 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2961 htab->tls_ldm_got.offset |= 1;
2962 }
2963 relocation = htab->elf.sgot->output_offset + off;
2964 unresolved_reloc = false;
2965 break;
2966
2967 case R_390_TLS_LE64:
2968 if (bfd_link_dll (info))
2969 {
2970 /* Linking a shared library with non-fpic code requires
2971 a R_390_TLS_TPOFF relocation. */
2972 Elf_Internal_Rela outrel;
2973 asection *sreloc;
2974 bfd_byte *loc;
2975 int indx;
2976
2977 outrel.r_offset = rel->r_offset
2978 + input_section->output_section->vma
2979 + input_section->output_offset;
2980 if (h != NULL && h->dynindx != -1)
2981 indx = h->dynindx;
2982 else
2983 indx = 0;
2984 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2985 if (indx == 0)
2986 outrel.r_addend = relocation - dtpoff_base (info);
2987 else
2988 outrel.r_addend = 0;
2989 sreloc = elf_section_data (input_section)->sreloc;
2990 if (sreloc == NULL)
2991 abort ();
2992 loc = sreloc->contents;
2993 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2994 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2995 }
2996 else
2997 {
2998 BFD_ASSERT (! unresolved_reloc);
2999 bfd_put_64 (output_bfd, -tpoff (info, relocation) + rel->r_addend,
3000 contents + rel->r_offset);
3001 }
3002 continue;
3003
3004 case R_390_TLS_LDO64:
3005 if (bfd_link_dll (info) || (input_section->flags & SEC_DEBUGGING))
3006 relocation -= dtpoff_base (info);
3007 else
3008 /* When converting LDO to LE, we must negate. */
3009 relocation = -tpoff (info, relocation);
3010 break;
3011
3012 /* Relocations for tls instructions. */
3013 case R_390_TLS_LOAD:
3014 case R_390_TLS_GDCALL:
3015 case R_390_TLS_LDCALL:
3016 tls_type = GOT_UNKNOWN;
3017 if (h == NULL && local_got_offsets)
3018 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3019 else if (h != NULL)
3020 tls_type = elf_s390_hash_entry(h)->tls_type;
3021
3022 if (tls_type == GOT_TLS_GD)
3023 continue;
3024
3025 if (r_type == R_390_TLS_LOAD)
3026 {
3027 if (!bfd_link_dll (info) && (h == NULL || h->dynindx == -1))
3028 {
3029 /* IE->LE transition. Four valid cases:
3030 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3031 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3032 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3033 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3034 unsigned int insn0, insn1, ry;
3035
3036 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3037 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3038 if (insn1 != 0x0004)
3039 {
3040 invalid_tls_insn (input_bfd, input_section, rel);
3041 return false;
3042 }
3043 if ((insn0 & 0xff00f000) == 0xe3000000)
3044 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3045 ry = (insn0 & 0x000f0000);
3046 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3047 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3048 ry = (insn0 & 0x0000f000) << 4;
3049 else if ((insn0 & 0xff00f000) == 0xe300c000)
3050 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3051 ry = (insn0 & 0x000f0000);
3052 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3053 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3054 ry = (insn0 & 0x0000f000) << 4;
3055 else
3056 {
3057 invalid_tls_insn (input_bfd, input_section, rel);
3058 return false;
3059 }
3060 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3061 insn1 = 0x000d;
3062 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3063 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3064 }
3065 }
3066 else if (r_type == R_390_TLS_GDCALL)
3067 {
3068 unsigned int insn0, insn1;
3069
3070 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3071 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3072 if ((insn0 & 0xffff0000) != 0xc0e50000)
3073 {
3074 invalid_tls_insn (input_bfd, input_section, rel);
3075 return false;
3076 }
3077 if (!bfd_link_dll (info) && (h == NULL || h->dynindx == -1))
3078 {
3079 /* GD->LE transition.
3080 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3081 insn0 = 0xc0040000;
3082 insn1 = 0x0000;
3083 }
3084 else
3085 {
3086 /* GD->IE transition.
3087 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3088 insn0 = 0xe322c000;
3089 insn1 = 0x0004;
3090 }
3091 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3092 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3093 }
3094 else if (r_type == R_390_TLS_LDCALL)
3095 {
3096 if (!bfd_link_dll (info))
3097 {
3098 unsigned int insn0, insn1;
3099
3100 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3101 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3102 if ((insn0 & 0xffff0000) != 0xc0e50000)
3103 {
3104 invalid_tls_insn (input_bfd, input_section, rel);
3105 return false;
3106 }
3107 /* LD->LE transition.
3108 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3109 insn0 = 0xc0040000;
3110 insn1 = 0x0000;
3111 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3112 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3113 }
3114 }
3115 continue;
3116
3117 default:
3118 break;
3119 }
3120
3121 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3122 because such sections are not SEC_ALLOC and thus ld.so will
3123 not process them. */
3124 if (unresolved_reloc
3125 && !((input_section->flags & SEC_DEBUGGING) != 0
3126 && h->def_dynamic)
3127 && _bfd_elf_section_offset (output_bfd, info, input_section,
3128 rel->r_offset) != (bfd_vma) -1)
3129 _bfd_error_handler
3130 /* xgettext:c-format */
3131 (_("%pB(%pA+%#" PRIx64 "): "
3132 "unresolvable %s relocation against symbol `%s'"),
3133 input_bfd,
3134 input_section,
3135 (uint64_t) rel->r_offset,
3136 howto->name,
3137 h->root.root.string);
3138
3139 do_relocation:
3140
3141 /* When applying a 24 bit reloc we need to start one byte
3142 earlier. Otherwise the 32 bit get/put bfd operations might
3143 access a byte after the actual section. */
3144 if (r_type == R_390_PC24DBL
3145 || r_type == R_390_PLT24DBL)
3146 rel->r_offset--;
3147
3148 /* Issue an error if the right shift implied by the relocation
3149 would drop bits from the symbol value. */
3150 if (howto->rightshift
3151 && (relocation & (((bfd_vma)1 << howto->rightshift) - 1)))
3152 {
3153 _bfd_error_handler
3154 /* xgettext:c-format */
3155 (_("%pB(%pA+%#" PRIx64 "): "
3156 "misaligned symbol `%s' (%#" PRIx64 ") for relocation %s"),
3157 input_bfd,
3158 input_section,
3159 (uint64_t) rel->r_offset,
3160 h->root.root.string,
3161 (uint64_t)relocation,
3162 howto->name);
3163 return false;
3164 }
3165
3166 if (r_type == R_390_20
3167 || r_type == R_390_GOT20
3168 || r_type == R_390_GOTPLT20
3169 || r_type == R_390_TLS_GOTIE20)
3170 {
3171 relocation += rel->r_addend;
3172 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3173 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3174 contents, rel->r_offset,
3175 relocation, 0);
3176 }
3177 else
3178 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3179 contents, rel->r_offset,
3180 relocation, rel->r_addend);
3181
3182 if (r != bfd_reloc_ok)
3183 {
3184 const char *name;
3185
3186 if (h != NULL)
3187 name = h->root.root.string;
3188 else
3189 {
3190 name = bfd_elf_string_from_elf_section (input_bfd,
3191 symtab_hdr->sh_link,
3192 sym->st_name);
3193 if (name == NULL)
3194 return false;
3195 if (*name == '\0')
3196 name = bfd_section_name (sec);
3197 }
3198
3199 if (r == bfd_reloc_overflow)
3200 (*info->callbacks->reloc_overflow)
3201 (info, (h ? &h->root : NULL), name, howto->name,
3202 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3203 else
3204 {
3205 _bfd_error_handler
3206 /* xgettext:c-format */
3207 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3208 input_bfd, input_section,
3209 (uint64_t) rel->r_offset, name, (int) r);
3210 return false;
3211 }
3212 }
3213 }
3214
3215 return true;
3216 }
3217
3218 /* Generate the PLT slots together with the dynamic relocations needed
3219 for IFUNC symbols. */
3220
3221 static void
3222 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3223 struct bfd_link_info *info,
3224 struct elf_link_hash_entry *h,
3225 struct elf_s390_link_hash_table *htab,
3226 bfd_vma plt_offset,
3227 bfd_vma resolver_address)
3228 {
3229 bfd_vma plt_index;
3230 bfd_vma got_offset;
3231 Elf_Internal_Rela rela;
3232 bfd_byte *loc;
3233 asection *plt, *gotplt, *relplt;
3234
3235 if (htab->elf.iplt == NULL
3236 || htab->elf.igotplt == NULL
3237 || htab->elf.irelplt == NULL)
3238 abort ();
3239
3240 /* Index of the PLT slot within iplt section. */
3241 plt_index = plt_offset / PLT_ENTRY_SIZE;
3242 plt = htab->elf.iplt;
3243 /* Offset into the igot.plt section. */
3244 got_offset = plt_index * GOT_ENTRY_SIZE;
3245 gotplt = htab->elf.igotplt;
3246 relplt = htab->elf.irelplt;
3247
3248 /* Fill in the blueprint of a PLT. */
3249 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3250 PLT_ENTRY_SIZE);
3251
3252 /* Fixup the relative address to the GOT entry */
3253 bfd_put_32 (output_bfd,
3254 (gotplt->output_section->vma +
3255 gotplt->output_offset + got_offset
3256 - (plt->output_section->vma +
3257 plt->output_offset +
3258 plt_offset))/2,
3259 plt->contents + plt_offset + 2);
3260 /* Fixup the relative branch to PLT 0 */
3261 bfd_put_32 (output_bfd, - (plt->output_offset +
3262 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3263 plt->contents + plt_offset + 24);
3264 /* Fixup offset into .rela.plt section. */
3265 bfd_put_32 (output_bfd, relplt->output_offset +
3266 plt_index * sizeof (Elf64_External_Rela),
3267 plt->contents + plt_offset + 28);
3268
3269 /* Fill in the entry in the global offset table.
3270 Points to instruction after GOT offset. */
3271 bfd_put_64 (output_bfd,
3272 (plt->output_section->vma
3273 + plt->output_offset
3274 + plt_offset
3275 + 14),
3276 gotplt->contents + got_offset);
3277
3278 /* Fill in the entry in the .rela.plt section. */
3279 rela.r_offset = (gotplt->output_section->vma
3280 + gotplt->output_offset
3281 + got_offset);
3282
3283 if (!h
3284 || h->dynindx == -1
3285 || ((bfd_link_executable (info)
3286 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3287 && h->def_regular))
3288 {
3289 /* The symbol can be locally resolved. */
3290 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3291 rela.r_addend = resolver_address;
3292 }
3293 else
3294 {
3295 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3296 rela.r_addend = 0;
3297 }
3298
3299 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3300 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3301 }
3302
3303
3304 /* Finish up dynamic symbol handling. We set the contents of various
3305 dynamic sections here. */
3306
3307 static bool
3308 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3309 struct bfd_link_info *info,
3310 struct elf_link_hash_entry *h,
3311 Elf_Internal_Sym *sym)
3312 {
3313 struct elf_s390_link_hash_table *htab;
3314 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3315
3316 htab = elf_s390_hash_table (info);
3317
3318 if (h->plt.offset != (bfd_vma) -1)
3319 {
3320 bfd_vma plt_index;
3321 bfd_vma gotplt_offset;
3322 Elf_Internal_Rela rela;
3323 bfd_byte *loc;
3324
3325 /* This symbol has an entry in the procedure linkage table. Set
3326 it up. */
3327 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3328 {
3329 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3330 htab, h->plt.offset,
3331 eh->ifunc_resolver_address +
3332 eh->ifunc_resolver_section->output_offset +
3333 eh->ifunc_resolver_section->output_section->vma);
3334
3335 /* Do not return yet. Handling of explicit GOT slots of
3336 IFUNC symbols is below. */
3337 }
3338 else
3339 {
3340 if (h->dynindx == -1
3341 || htab->elf.splt == NULL
3342 || htab->elf.sgotplt == NULL
3343 || htab->elf.srelplt == NULL)
3344 abort ();
3345
3346 /* Calc. index no.
3347 Current offset - size first entry / entry size. */
3348 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3349
3350 /* The slots in the .got.plt correspond to the PLT slots in
3351 the same order. */
3352 gotplt_offset = plt_index * GOT_ENTRY_SIZE;
3353
3354 /* If .got.plt comes first it needs to contain the 3 header
3355 entries. */
3356 if (!s390_gotplt_after_got_p (info))
3357 gotplt_offset += 3 * GOT_ENTRY_SIZE;
3358
3359 /* Fill in the blueprint of a PLT. */
3360 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3361 PLT_ENTRY_SIZE);
3362
3363 /* The first instruction in the PLT entry is a LARL loading
3364 the address of the GOT slot. We write the 4 byte
3365 immediate operand of the LARL instruction here. */
3366 bfd_put_32 (output_bfd,
3367 (htab->elf.sgotplt->output_section->vma +
3368 htab->elf.sgotplt->output_offset + gotplt_offset
3369 - (htab->elf.splt->output_section->vma +
3370 htab->elf.splt->output_offset +
3371 h->plt.offset))/2,
3372 htab->elf.splt->contents + h->plt.offset + 2);
3373 /* Fixup the relative branch to PLT 0 */
3374 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3375 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3376 htab->elf.splt->contents + h->plt.offset + 24);
3377 /* Fixup offset into .rela.plt section. */
3378 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3379 htab->elf.splt->contents + h->plt.offset + 28);
3380
3381 /* Fill in the entry in the global offset table.
3382 Points to instruction after GOT offset. */
3383 bfd_put_64 (output_bfd,
3384 (htab->elf.splt->output_section->vma
3385 + htab->elf.splt->output_offset
3386 + h->plt.offset
3387 + 14),
3388 htab->elf.sgotplt->contents + gotplt_offset);
3389
3390 /* Fill in the entry in the .rela.plt section. */
3391 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3392 + htab->elf.sgotplt->output_offset
3393 + gotplt_offset);
3394 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3395 rela.r_addend = 0;
3396 loc = htab->elf.srelplt->contents + plt_index *
3397 sizeof (Elf64_External_Rela);
3398 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3399
3400 if (!h->def_regular)
3401 {
3402 /* Mark the symbol as undefined, rather than as defined in
3403 the .plt section. Leave the value alone. This is a clue
3404 for the dynamic linker, to make function pointer
3405 comparisons work between an application and shared
3406 library. */
3407 sym->st_shndx = SHN_UNDEF;
3408 }
3409 }
3410 }
3411
3412 if (h->got.offset != (bfd_vma) -1
3413 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3414 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3415 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3416 {
3417 Elf_Internal_Rela rela;
3418 bfd_byte *loc;
3419
3420 /* This symbol has an entry in the global offset table. Set it
3421 up. */
3422 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3423 abort ();
3424
3425 rela.r_offset = (htab->elf.sgot->output_section->vma
3426 + htab->elf.sgot->output_offset
3427 + (h->got.offset &~ (bfd_vma) 1));
3428
3429 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3430 {
3431 if (bfd_link_pic (info))
3432 {
3433 /* An explicit GOT slot usage needs GLOB_DAT. If the
3434 symbol references local the implicit got.iplt slot
3435 will be used and the IRELATIVE reloc has been created
3436 above. */
3437 goto do_glob_dat;
3438 }
3439 else
3440 {
3441 /* For non-shared objects explicit GOT slots must be
3442 filled with the PLT slot address for pointer
3443 equality reasons. */
3444 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3445 + htab->elf.iplt->output_offset
3446 + h->plt.offset),
3447 htab->elf.sgot->contents + h->got.offset);
3448 return true;
3449 }
3450 }
3451 else if (SYMBOL_REFERENCES_LOCAL (info, h))
3452 {
3453 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3454 return true;
3455
3456 /* If this is a static link, or it is a -Bsymbolic link and
3457 the symbol is defined locally or was forced to be local
3458 because of a version file, we just want to emit a
3459 RELATIVE reloc. The entry in the global offset table
3460 will already have been initialized in the
3461 relocate_section function. */
3462 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3463 return false;
3464 BFD_ASSERT((h->got.offset & 1) != 0);
3465 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3466 rela.r_addend = (h->root.u.def.value
3467 + h->root.u.def.section->output_section->vma
3468 + h->root.u.def.section->output_offset);
3469 }
3470 else
3471 {
3472 BFD_ASSERT((h->got.offset & 1) == 0);
3473 do_glob_dat:
3474 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3475 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3476 rela.r_addend = 0;
3477 }
3478
3479 loc = htab->elf.srelgot->contents;
3480 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3481 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3482 }
3483
3484 if (h->needs_copy)
3485 {
3486 Elf_Internal_Rela rela;
3487 asection *s;
3488 bfd_byte *loc;
3489
3490 /* This symbols needs a copy reloc. Set it up. */
3491
3492 if (h->dynindx == -1
3493 || (h->root.type != bfd_link_hash_defined
3494 && h->root.type != bfd_link_hash_defweak)
3495 || htab->elf.srelbss == NULL)
3496 abort ();
3497
3498 rela.r_offset = (h->root.u.def.value
3499 + h->root.u.def.section->output_section->vma
3500 + h->root.u.def.section->output_offset);
3501 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3502 rela.r_addend = 0;
3503 if (h->root.u.def.section == htab->elf.sdynrelro)
3504 s = htab->elf.sreldynrelro;
3505 else
3506 s = htab->elf.srelbss;
3507 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3508 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3509 }
3510
3511 /* Mark some specially defined symbols as absolute. */
3512 if (h == htab->elf.hdynamic
3513 || h == htab->elf.hgot
3514 || h == htab->elf.hplt)
3515 sym->st_shndx = SHN_ABS;
3516
3517 return true;
3518 }
3519
3520 /* Used to decide how to sort relocs in an optimal manner for the
3521 dynamic linker, before writing them out. */
3522
3523 static enum elf_reloc_type_class
3524 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3525 const asection *rel_sec ATTRIBUTE_UNUSED,
3526 const Elf_Internal_Rela *rela)
3527 {
3528 bfd *abfd = info->output_bfd;
3529 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3530 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3531 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3532 Elf_Internal_Sym sym;
3533
3534 if (htab->elf.dynsym == NULL
3535 || !bed->s->swap_symbol_in (abfd,
3536 (htab->elf.dynsym->contents
3537 + r_symndx * bed->s->sizeof_sym),
3538 0, &sym))
3539 abort ();
3540
3541 /* Check relocation against STT_GNU_IFUNC symbol. */
3542 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3543 return reloc_class_ifunc;
3544
3545 switch ((int) ELF64_R_TYPE (rela->r_info))
3546 {
3547 case R_390_RELATIVE:
3548 return reloc_class_relative;
3549 case R_390_JMP_SLOT:
3550 return reloc_class_plt;
3551 case R_390_COPY:
3552 return reloc_class_copy;
3553 default:
3554 return reloc_class_normal;
3555 }
3556 }
3557
3558 /* Finish up the dynamic sections. */
3559
3560 static bool
3561 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3562 struct bfd_link_info *info)
3563 {
3564 struct elf_s390_link_hash_table *htab;
3565 bfd *dynobj;
3566 asection *sdyn;
3567 bfd *ibfd;
3568 unsigned int i;
3569
3570 htab = elf_s390_hash_table (info);
3571 if (htab == NULL)
3572 return false;
3573
3574 dynobj = htab->elf.dynobj;
3575 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3576
3577 if (htab->elf.dynamic_sections_created)
3578 {
3579 Elf64_External_Dyn *dyncon, *dynconend;
3580
3581 if (sdyn == NULL || htab->elf.sgot == NULL)
3582 abort ();
3583
3584 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3585 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3586 for (; dyncon < dynconend; dyncon++)
3587 {
3588 Elf_Internal_Dyn dyn;
3589 asection *s;
3590
3591 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3592
3593 switch (dyn.d_tag)
3594 {
3595 default:
3596 continue;
3597
3598 case DT_PLTGOT:
3599 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3600 dyn.d_un.d_ptr = s390_got_pointer (info);
3601 break;
3602
3603 case DT_JMPREL:
3604 s = htab->elf.srelplt;
3605 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3606 break;
3607
3608 case DT_PLTRELSZ:
3609 dyn.d_un.d_val = htab->elf.srelplt->size;
3610 if (htab->elf.irelplt)
3611 dyn.d_un.d_val += htab->elf.irelplt->size;
3612 break;
3613
3614 case DT_RELASZ:
3615 /* The procedure linkage table relocs (DT_JMPREL) should
3616 not be included in the overall relocs (DT_RELA).
3617 Therefore, we override the DT_RELASZ entry here to
3618 make it not include the JMPREL relocs. Since the
3619 linker script arranges for .rela.plt to follow all
3620 other relocation sections, we don't have to worry
3621 about changing the DT_RELA entry. */
3622 dyn.d_un.d_val -= htab->elf.srelplt->size;
3623 if (htab->elf.irelplt)
3624 dyn.d_un.d_val -= htab->elf.irelplt->size;
3625 break;
3626 }
3627
3628 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3629 }
3630
3631 /* Fill in the special first entry in the procedure linkage table. */
3632 if (htab->elf.splt && htab->elf.splt->size > 0)
3633 {
3634 /* fill in blueprint for plt 0 entry */
3635 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3636 PLT_FIRST_ENTRY_SIZE);
3637 /* The second instruction in the first PLT entry is a LARL
3638 loading the GOT pointer. Fill in the LARL immediate
3639 address. */
3640 bfd_put_32 (output_bfd,
3641 (s390_got_pointer (info)
3642 - htab->elf.splt->output_section->vma
3643 - htab->elf.splt->output_offset - 6)/2,
3644 htab->elf.splt->contents + 8);
3645 }
3646 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3647 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3648 = PLT_ENTRY_SIZE;
3649 }
3650
3651 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
3652 {
3653 /* Fill in the first three entries in the global offset table. */
3654 if (htab->elf.hgot->root.u.def.section->size > 0)
3655 {
3656 bfd_put_64 (output_bfd,
3657 (sdyn == NULL ? (bfd_vma) 0
3658 : sdyn->output_section->vma + sdyn->output_offset),
3659 htab->elf.hgot->root.u.def.section->contents);
3660 /* One entry for shared object struct ptr. */
3661 bfd_put_64 (output_bfd, (bfd_vma) 0,
3662 htab->elf.hgot->root.u.def.section->contents + 8);
3663 /* One entry for _dl_runtime_resolve. */
3664 bfd_put_64 (output_bfd, (bfd_vma) 0,
3665 htab->elf.hgot->root.u.def.section->contents + 16);
3666 }
3667 if (htab->elf.sgot != NULL && htab->elf.sgot->size > 0)
3668 elf_section_data (htab->elf.sgot->output_section)
3669 ->this_hdr.sh_entsize = 8;
3670 }
3671
3672 /* Finish dynamic symbol for local IFUNC symbols. */
3673 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3674 {
3675 struct plt_entry *local_plt;
3676 Elf_Internal_Sym *isym;
3677 Elf_Internal_Shdr *symtab_hdr;
3678
3679 symtab_hdr = &elf_symtab_hdr (ibfd);
3680
3681 if (!is_s390_elf (ibfd))
3682 continue;
3683
3684 local_plt = elf_s390_local_plt (ibfd);
3685 if (local_plt != NULL)
3686 for (i = 0; i < symtab_hdr->sh_info; i++)
3687 {
3688 if (local_plt[i].plt.offset != (bfd_vma) -1)
3689 {
3690 asection *sec = local_plt[i].sec;
3691 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, ibfd, i);
3692 if (isym == NULL)
3693 return false;
3694
3695 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3696 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3697 local_plt[i].plt.offset,
3698 isym->st_value
3699 + sec->output_section->vma
3700 + sec->output_offset);
3701
3702 }
3703 }
3704 }
3705
3706 return true;
3707 }
3708 \f
3709 /* Support for core dump NOTE sections. */
3710
3711 static bool
3712 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3713 {
3714 int offset;
3715 size_t size;
3716
3717 switch (note->descsz)
3718 {
3719 default:
3720 return false;
3721
3722 case 336: /* sizeof(struct elf_prstatus) on s390x */
3723 /* pr_cursig */
3724 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3725
3726 /* pr_pid */
3727 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3728
3729 /* pr_reg */
3730 offset = 112;
3731 size = 216;
3732 break;
3733 }
3734
3735 /* Make a ".reg/999" section. */
3736 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3737 size, note->descpos + offset);
3738 }
3739
3740 static bool
3741 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3742 {
3743 switch (note->descsz)
3744 {
3745 default:
3746 return false;
3747
3748 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3749 elf_tdata (abfd)->core->pid
3750 = bfd_get_32 (abfd, note->descdata + 24);
3751 elf_tdata (abfd)->core->program
3752 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3753 elf_tdata (abfd)->core->command
3754 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3755 }
3756
3757 /* Note that for some reason, a spurious space is tacked
3758 onto the end of the args in some (at least one anyway)
3759 implementations, so strip it off if it exists. */
3760
3761 {
3762 char *command = elf_tdata (abfd)->core->command;
3763 int n = strlen (command);
3764
3765 if (0 < n && command[n - 1] == ' ')
3766 command[n - 1] = '\0';
3767 }
3768
3769 return true;
3770 }
3771
3772 static char *
3773 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3774 int note_type, ...)
3775 {
3776 va_list ap;
3777
3778 switch (note_type)
3779 {
3780 default:
3781 return NULL;
3782
3783 case NT_PRPSINFO:
3784 {
3785 char data[136] ATTRIBUTE_NONSTRING = { 0 };
3786 const char *fname, *psargs;
3787
3788 va_start (ap, note_type);
3789 fname = va_arg (ap, const char *);
3790 psargs = va_arg (ap, const char *);
3791 va_end (ap);
3792
3793 strncpy (data + 40, fname, 16);
3794 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3795 DIAGNOSTIC_PUSH;
3796 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3797 -Wstringop-truncation:
3798 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3799 */
3800 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3801 #endif
3802 strncpy (data + 56, psargs, 80);
3803 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3804 DIAGNOSTIC_POP;
3805 #endif
3806 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3807 &data, sizeof (data));
3808 }
3809
3810 case NT_PRSTATUS:
3811 {
3812 char data[336] = { 0 };
3813 long pid;
3814 int cursig;
3815 const void *gregs;
3816
3817 va_start (ap, note_type);
3818 pid = va_arg (ap, long);
3819 cursig = va_arg (ap, int);
3820 gregs = va_arg (ap, const void *);
3821 va_end (ap);
3822
3823 bfd_put_16 (abfd, cursig, data + 12);
3824 bfd_put_32 (abfd, pid, data + 32);
3825 memcpy (data + 112, gregs, 216);
3826 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3827 &data, sizeof (data));
3828 }
3829 }
3830 /* NOTREACHED */
3831 }
3832 \f
3833 /* Return address for Ith PLT stub in section PLT, for relocation REL
3834 or (bfd_vma) -1 if it should not be included. */
3835
3836 static bfd_vma
3837 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3838 const arelent *rel ATTRIBUTE_UNUSED)
3839 {
3840 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3841 }
3842
3843 /* Merge backend specific data from an object file to the output
3844 object file when linking. */
3845
3846 static bool
3847 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3848 {
3849 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3850 return true;
3851
3852 return elf_s390_merge_obj_attributes (ibfd, info);
3853 }
3854
3855 /* We may add a PT_S390_PGSTE program header. */
3856
3857 static int
3858 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3859 struct bfd_link_info *info)
3860 {
3861 struct elf_s390_link_hash_table *htab;
3862
3863 if (info)
3864 {
3865 htab = elf_s390_hash_table (info);
3866 if (htab)
3867 return htab->params->pgste;
3868 }
3869 return 0;
3870 }
3871
3872
3873 /* Add the PT_S390_PGSTE program header. */
3874
3875 static bool
3876 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3877 {
3878 struct elf_s390_link_hash_table *htab;
3879 struct elf_segment_map *m, *pm = NULL;
3880
3881 if (!abfd || !info)
3882 return true;
3883
3884 htab = elf_s390_hash_table (info);
3885 if (!htab || !htab->params->pgste)
3886 return true;
3887
3888 /* If there is already a PT_S390_PGSTE header, avoid adding
3889 another. */
3890 m = elf_seg_map (abfd);
3891 while (m && m->p_type != PT_S390_PGSTE)
3892 {
3893 pm = m;
3894 m = m->next;
3895 }
3896
3897 if (m)
3898 return true;
3899
3900 m = (struct elf_segment_map *)
3901 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3902 if (m == NULL)
3903 return false;
3904 m->p_type = PT_S390_PGSTE;
3905 m->count = 0;
3906 m->next = NULL;
3907 if (pm)
3908 pm->next = m;
3909
3910 return true;
3911 }
3912
3913 bool
3914 bfd_elf_s390_set_options (struct bfd_link_info *info,
3915 struct s390_elf_params *params)
3916 {
3917 struct elf_s390_link_hash_table *htab;
3918
3919 if (info)
3920 {
3921 htab = elf_s390_hash_table (info);
3922 if (htab)
3923 htab->params = params;
3924 }
3925
3926 return true;
3927 }
3928
3929
3930 /* Why was the hash table entry size definition changed from
3931 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3932 this is the only reason for the s390_elf64_size_info structure. */
3933
3934 const struct elf_size_info s390_elf64_size_info =
3935 {
3936 sizeof (Elf64_External_Ehdr),
3937 sizeof (Elf64_External_Phdr),
3938 sizeof (Elf64_External_Shdr),
3939 sizeof (Elf64_External_Rel),
3940 sizeof (Elf64_External_Rela),
3941 sizeof (Elf64_External_Sym),
3942 sizeof (Elf64_External_Dyn),
3943 sizeof (Elf_External_Note),
3944 8, /* hash-table entry size. */
3945 1, /* internal relocations per external relocations. */
3946 64, /* arch_size. */
3947 3, /* log_file_align. */
3948 ELFCLASS64, EV_CURRENT,
3949 bfd_elf64_write_out_phdrs,
3950 bfd_elf64_write_shdrs_and_ehdr,
3951 bfd_elf64_checksum_contents,
3952 bfd_elf64_write_relocs,
3953 bfd_elf64_swap_symbol_in,
3954 bfd_elf64_swap_symbol_out,
3955 bfd_elf64_slurp_reloc_table,
3956 bfd_elf64_slurp_symbol_table,
3957 bfd_elf64_swap_dyn_in,
3958 bfd_elf64_swap_dyn_out,
3959 bfd_elf64_swap_reloc_in,
3960 bfd_elf64_swap_reloc_out,
3961 bfd_elf64_swap_reloca_in,
3962 bfd_elf64_swap_reloca_out
3963 };
3964
3965 #define TARGET_BIG_SYM s390_elf64_vec
3966 #define TARGET_BIG_NAME "elf64-s390"
3967 #define ELF_ARCH bfd_arch_s390
3968 #define ELF_TARGET_ID S390_ELF_DATA
3969 #define ELF_MACHINE_CODE EM_S390
3970 #define ELF_MACHINE_ALT1 EM_S390_OLD
3971 #define ELF_MAXPAGESIZE 0x1000
3972
3973 #define elf_backend_size_info s390_elf64_size_info
3974
3975 #define elf_backend_can_gc_sections 1
3976 #define elf_backend_can_refcount 1
3977 #define elf_backend_want_got_plt 1
3978 #define elf_backend_plt_readonly 1
3979 #define elf_backend_want_plt_sym 0
3980 #define elf_backend_got_header_size 24
3981 #define elf_backend_want_dynrelro 1
3982 #define elf_backend_rela_normal 1
3983
3984 #define elf_info_to_howto elf_s390_info_to_howto
3985
3986 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3987 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3988 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3989 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3990 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3991
3992 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3993 #define elf_backend_check_relocs elf_s390_check_relocs
3994 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3995 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3996 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3997 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3998 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3999 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4000 #define elf_backend_relocate_section elf_s390_relocate_section
4001 #define elf_backend_late_size_sections elf_s390_late_size_sections
4002 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4003 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4004 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4005 #define elf_backend_write_core_note elf_s390_write_core_note
4006 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4007 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4008 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
4009 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
4010
4011 #define bfd_elf64_mkobject elf_s390_mkobject
4012 #define elf_backend_object_p elf_s390_object_p
4013
4014 #include "elf64-target.h"
The GNU Binutils are a collection of binary tools.