]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blob - bfd/elf64-s390.c
projects / thirdparty / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
problem debugging ravenscar programs if runtime is stripped
[thirdparty/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include "elf-s390.h"
29 #include <stdarg.h>
30
31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33 #define MINUS_ONE (((bfd_vma)0) - 1)
34
35 static bfd_reloc_status_type
36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
37 asection *, bfd *, char **);
38 static bfd_reloc_status_type
39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
40 asection *, bfd *, char **);
41
42 /* The relocation "howto" table. */
43 static reloc_howto_type elf_howto_table[] =
44 {
45 HOWTO (R_390_NONE, /* type */
46 0, /* rightshift */
47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
48 0, /* bitsize */
49 FALSE, /* pc_relative */
50 0, /* bitpos */
51 complain_overflow_dont, /* complain_on_overflow */
52 bfd_elf_generic_reloc, /* special_function */
53 "R_390_NONE", /* name */
54 FALSE, /* partial_inplace */
55 0, /* src_mask */
56 0, /* dst_mask */
57 FALSE), /* pcrel_offset */
58
59 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
75 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
79 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
81 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
83 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
85 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
87 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
99 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
101 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
103 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
105 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
107 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
109 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
111 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
113 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
115 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
123 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
125 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
138 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
140 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
149 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
151 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
154 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
165 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
169 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
173 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
175 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
181 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
183 };
184
185 /* GNU extension to record C++ vtable hierarchy. */
186 static reloc_howto_type elf64_s390_vtinherit_howto =
187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
188 static reloc_howto_type elf64_s390_vtentry_howto =
189 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
190
191 static reloc_howto_type *
192 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
193 bfd_reloc_code_real_type code)
194 {
195 switch (code)
196 {
197 case BFD_RELOC_NONE:
198 return &elf_howto_table[(int) R_390_NONE];
199 case BFD_RELOC_8:
200 return &elf_howto_table[(int) R_390_8];
201 case BFD_RELOC_390_12:
202 return &elf_howto_table[(int) R_390_12];
203 case BFD_RELOC_16:
204 return &elf_howto_table[(int) R_390_16];
205 case BFD_RELOC_32:
206 return &elf_howto_table[(int) R_390_32];
207 case BFD_RELOC_CTOR:
208 return &elf_howto_table[(int) R_390_32];
209 case BFD_RELOC_32_PCREL:
210 return &elf_howto_table[(int) R_390_PC32];
211 case BFD_RELOC_390_GOT12:
212 return &elf_howto_table[(int) R_390_GOT12];
213 case BFD_RELOC_32_GOT_PCREL:
214 return &elf_howto_table[(int) R_390_GOT32];
215 case BFD_RELOC_390_PLT32:
216 return &elf_howto_table[(int) R_390_PLT32];
217 case BFD_RELOC_390_COPY:
218 return &elf_howto_table[(int) R_390_COPY];
219 case BFD_RELOC_390_GLOB_DAT:
220 return &elf_howto_table[(int) R_390_GLOB_DAT];
221 case BFD_RELOC_390_JMP_SLOT:
222 return &elf_howto_table[(int) R_390_JMP_SLOT];
223 case BFD_RELOC_390_RELATIVE:
224 return &elf_howto_table[(int) R_390_RELATIVE];
225 case BFD_RELOC_32_GOTOFF:
226 return &elf_howto_table[(int) R_390_GOTOFF32];
227 case BFD_RELOC_390_GOTPC:
228 return &elf_howto_table[(int) R_390_GOTPC];
229 case BFD_RELOC_390_GOT16:
230 return &elf_howto_table[(int) R_390_GOT16];
231 case BFD_RELOC_16_PCREL:
232 return &elf_howto_table[(int) R_390_PC16];
233 case BFD_RELOC_390_PC12DBL:
234 return &elf_howto_table[(int) R_390_PC12DBL];
235 case BFD_RELOC_390_PLT12DBL:
236 return &elf_howto_table[(int) R_390_PLT12DBL];
237 case BFD_RELOC_390_PC16DBL:
238 return &elf_howto_table[(int) R_390_PC16DBL];
239 case BFD_RELOC_390_PLT16DBL:
240 return &elf_howto_table[(int) R_390_PLT16DBL];
241 case BFD_RELOC_390_PC24DBL:
242 return &elf_howto_table[(int) R_390_PC24DBL];
243 case BFD_RELOC_390_PLT24DBL:
244 return &elf_howto_table[(int) R_390_PLT24DBL];
245 case BFD_RELOC_390_PC32DBL:
246 return &elf_howto_table[(int) R_390_PC32DBL];
247 case BFD_RELOC_390_PLT32DBL:
248 return &elf_howto_table[(int) R_390_PLT32DBL];
249 case BFD_RELOC_390_GOTPCDBL:
250 return &elf_howto_table[(int) R_390_GOTPCDBL];
251 case BFD_RELOC_64:
252 return &elf_howto_table[(int) R_390_64];
253 case BFD_RELOC_64_PCREL:
254 return &elf_howto_table[(int) R_390_PC64];
255 case BFD_RELOC_390_GOT64:
256 return &elf_howto_table[(int) R_390_GOT64];
257 case BFD_RELOC_390_PLT64:
258 return &elf_howto_table[(int) R_390_PLT64];
259 case BFD_RELOC_390_GOTENT:
260 return &elf_howto_table[(int) R_390_GOTENT];
261 case BFD_RELOC_16_GOTOFF:
262 return &elf_howto_table[(int) R_390_GOTOFF16];
263 case BFD_RELOC_390_GOTOFF64:
264 return &elf_howto_table[(int) R_390_GOTOFF64];
265 case BFD_RELOC_390_GOTPLT12:
266 return &elf_howto_table[(int) R_390_GOTPLT12];
267 case BFD_RELOC_390_GOTPLT16:
268 return &elf_howto_table[(int) R_390_GOTPLT16];
269 case BFD_RELOC_390_GOTPLT32:
270 return &elf_howto_table[(int) R_390_GOTPLT32];
271 case BFD_RELOC_390_GOTPLT64:
272 return &elf_howto_table[(int) R_390_GOTPLT64];
273 case BFD_RELOC_390_GOTPLTENT:
274 return &elf_howto_table[(int) R_390_GOTPLTENT];
275 case BFD_RELOC_390_PLTOFF16:
276 return &elf_howto_table[(int) R_390_PLTOFF16];
277 case BFD_RELOC_390_PLTOFF32:
278 return &elf_howto_table[(int) R_390_PLTOFF32];
279 case BFD_RELOC_390_PLTOFF64:
280 return &elf_howto_table[(int) R_390_PLTOFF64];
281 case BFD_RELOC_390_TLS_LOAD:
282 return &elf_howto_table[(int) R_390_TLS_LOAD];
283 case BFD_RELOC_390_TLS_GDCALL:
284 return &elf_howto_table[(int) R_390_TLS_GDCALL];
285 case BFD_RELOC_390_TLS_LDCALL:
286 return &elf_howto_table[(int) R_390_TLS_LDCALL];
287 case BFD_RELOC_390_TLS_GD64:
288 return &elf_howto_table[(int) R_390_TLS_GD64];
289 case BFD_RELOC_390_TLS_GOTIE12:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
291 case BFD_RELOC_390_TLS_GOTIE64:
292 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
293 case BFD_RELOC_390_TLS_LDM64:
294 return &elf_howto_table[(int) R_390_TLS_LDM64];
295 case BFD_RELOC_390_TLS_IE64:
296 return &elf_howto_table[(int) R_390_TLS_IE64];
297 case BFD_RELOC_390_TLS_IEENT:
298 return &elf_howto_table[(int) R_390_TLS_IEENT];
299 case BFD_RELOC_390_TLS_LE64:
300 return &elf_howto_table[(int) R_390_TLS_LE64];
301 case BFD_RELOC_390_TLS_LDO64:
302 return &elf_howto_table[(int) R_390_TLS_LDO64];
303 case BFD_RELOC_390_TLS_DTPMOD:
304 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
305 case BFD_RELOC_390_TLS_DTPOFF:
306 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
307 case BFD_RELOC_390_TLS_TPOFF:
308 return &elf_howto_table[(int) R_390_TLS_TPOFF];
309 case BFD_RELOC_390_20:
310 return &elf_howto_table[(int) R_390_20];
311 case BFD_RELOC_390_GOT20:
312 return &elf_howto_table[(int) R_390_GOT20];
313 case BFD_RELOC_390_GOTPLT20:
314 return &elf_howto_table[(int) R_390_GOTPLT20];
315 case BFD_RELOC_390_TLS_GOTIE20:
316 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
317 case BFD_RELOC_390_IRELATIVE:
318 return &elf_howto_table[(int) R_390_IRELATIVE];
319 case BFD_RELOC_VTABLE_INHERIT:
320 return &elf64_s390_vtinherit_howto;
321 case BFD_RELOC_VTABLE_ENTRY:
322 return &elf64_s390_vtentry_howto;
323 default:
324 break;
325 }
326 return 0;
327 }
328
329 static reloc_howto_type *
330 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
331 const char *r_name)
332 {
333 unsigned int i;
334
335 for (i = 0;
336 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
337 i++)
338 if (elf_howto_table[i].name != NULL
339 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
340 return &elf_howto_table[i];
341
342 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
343 return &elf64_s390_vtinherit_howto;
344 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
345 return &elf64_s390_vtentry_howto;
346
347 return NULL;
348 }
349
350 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
351 and elf64-s390.c has its own copy. */
352
353 static void
354 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
355 arelent *cache_ptr,
356 Elf_Internal_Rela *dst)
357 {
358 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
359 switch (r_type)
360 {
361 case R_390_GNU_VTINHERIT:
362 cache_ptr->howto = &elf64_s390_vtinherit_howto;
363 break;
364
365 case R_390_GNU_VTENTRY:
366 cache_ptr->howto = &elf64_s390_vtentry_howto;
367 break;
368
369 default:
370 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
371 {
372 /* xgettext:c-format */
373 _bfd_error_handler (_("%B: invalid relocation type %d"),
374 abfd, (int) r_type);
375 r_type = R_390_NONE;
376 }
377 cache_ptr->howto = &elf_howto_table[r_type];
378 }
379 }
380
381 /* A relocation function which doesn't do anything. */
382 static bfd_reloc_status_type
383 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
384 arelent *reloc_entry,
385 asymbol *symbol ATTRIBUTE_UNUSED,
386 void * data ATTRIBUTE_UNUSED,
387 asection *input_section,
388 bfd *output_bfd,
389 char **error_message ATTRIBUTE_UNUSED)
390 {
391 if (output_bfd)
392 reloc_entry->address += input_section->output_offset;
393 return bfd_reloc_ok;
394 }
395
396 /* Handle the large displacement relocs. */
397 static bfd_reloc_status_type
398 s390_elf_ldisp_reloc (bfd *abfd,
399 arelent *reloc_entry,
400 asymbol *symbol,
401 void * data,
402 asection *input_section,
403 bfd *output_bfd,
404 char **error_message ATTRIBUTE_UNUSED)
405 {
406 reloc_howto_type *howto = reloc_entry->howto;
407 bfd_vma relocation;
408 bfd_vma insn;
409
410 if (output_bfd != (bfd *) NULL
411 && (symbol->flags & BSF_SECTION_SYM) == 0
412 && (! howto->partial_inplace
413 || reloc_entry->addend == 0))
414 {
415 reloc_entry->address += input_section->output_offset;
416 return bfd_reloc_ok;
417 }
418 if (output_bfd != NULL)
419 return bfd_reloc_continue;
420
421 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
422 return bfd_reloc_outofrange;
423
424 relocation = (symbol->value
425 + symbol->section->output_section->vma
426 + symbol->section->output_offset);
427 relocation += reloc_entry->addend;
428 if (howto->pc_relative)
429 {
430 relocation -= (input_section->output_section->vma
431 + input_section->output_offset);
432 relocation -= reloc_entry->address;
433 }
434
435 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
436 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
437 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
438
439 if ((bfd_signed_vma) relocation < - 0x80000
440 || (bfd_signed_vma) relocation > 0x7ffff)
441 return bfd_reloc_overflow;
442 else
443 return bfd_reloc_ok;
444 }
445
446 static bfd_boolean
447 elf_s390_is_local_label_name (bfd *abfd, const char *name)
448 {
449 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
450 return TRUE;
451
452 return _bfd_elf_is_local_label_name (abfd, name);
453 }
454
455 /* Functions for the 390 ELF linker. */
456
457 /* The name of the dynamic interpreter. This is put in the .interp
458 section. */
459
460 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
461
462 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
463 copying dynamic variables from a shared lib into an app's dynbss
464 section, and instead use a dynamic relocation to point into the
465 shared lib. */
466 #define ELIMINATE_COPY_RELOCS 1
467
468 /* The size in bytes of the first entry in the procedure linkage table. */
469 #define PLT_FIRST_ENTRY_SIZE 32
470 /* The size in bytes of an entry in the procedure linkage table. */
471 #define PLT_ENTRY_SIZE 32
472
473 #define GOT_ENTRY_SIZE 8
474
475 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
476
477 /* The first three entries in a procedure linkage table are reserved,
478 and the initial contents are unimportant (we zero them out).
479 Subsequent entries look like this. See the SVR4 ABI 386
480 supplement to see how this works. */
481
482 /* For the s390, simple addr offset can only be 0 - 4096.
483 To use the full 16777216 TB address space, several instructions
484 are needed to load an address in a register and execute
485 a branch( or just saving the address)
486
487 Furthermore, only r 0 and 1 are free to use!!! */
488
489 /* The first 3 words in the GOT are then reserved.
490 Word 0 is the address of the dynamic table.
491 Word 1 is a pointer to a structure describing the object
492 Word 2 is used to point to the loader entry address.
493
494 The code for PLT entries looks like this:
495
496 The GOT holds the address in the PLT to be executed.
497 The loader then gets:
498 48(15) = Pointer to the structure describing the object.
499 56(15) = Offset in symbol table
500 The loader must then find the module where the function is
501 and insert the address in the GOT.
502
503 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
504 LG 1,0(1) # 6 bytes Load address from GOT in r1
505 BCR 15,1 # 2 bytes Jump to address
506 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
507 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
508 BRCL 15,-x # 6 bytes Jump to start of PLT
509 .long ? # 4 bytes offset into .rela.plt
510
511 Total = 32 bytes per PLT entry
512 Fixup at offset 2: relative address to GOT entry
513 Fixup at offset 22: relative branch to PLT0
514 Fixup at offset 28: 32 bit offset into .rela.plt
515
516 A 32 bit offset into the symbol table is enough. It allows for
517 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
518 object (the main program, any shared library) is limited to 4GB in
519 size. Having a .rela.plt of 2GB would already make the .plt
520 section bigger than 8GB. */
521
522 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
523 {
524 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
525 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
526 0x07, 0xf1, /* br %r1 */
527 0x0d, 0x10, /* basr %r1,%r0 */
528 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
529 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
530 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
531 };
532
533 /* The first PLT entry pushes the offset into the symbol table
534 from R1 onto the stack at 56(15) and the loader object info
535 at 48(15), loads the loader address in R1 and jumps to it. */
536
537 /* The first entry in the PLT:
538
539 PLT0:
540 STG 1,56(15) # r1 contains the offset into the symbol table
541 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
542 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
543 LG 1,16(1) # get entry address of loader
544 BCR 15,1 # jump to loader
545
546 Fixup at offset 8: relative address to start of GOT. */
547
548 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
549 {
550 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
551 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
552 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
553 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
554 0x07, 0xf1, /* br %r1 */
555 0x07, 0x00, /* nopr %r0 */
556 0x07, 0x00, /* nopr %r0 */
557 0x07, 0x00 /* nopr %r0 */
558 };
559
560
561 /* s390 ELF linker hash entry. */
562
563 struct elf_s390_link_hash_entry
564 {
565 struct elf_link_hash_entry elf;
566
567 /* Track dynamic relocs copied for this symbol. */
568 struct elf_dyn_relocs *dyn_relocs;
569
570 /* Number of GOTPLT references for a function. */
571 bfd_signed_vma gotplt_refcount;
572
573 #define GOT_UNKNOWN 0
574 #define GOT_NORMAL 1
575 #define GOT_TLS_GD 2
576 #define GOT_TLS_IE 3
577 #define GOT_TLS_IE_NLT 3
578 unsigned char tls_type;
579
580 /* For pointer equality reasons we might need to change the symbol
581 type from STT_GNU_IFUNC to STT_FUNC together with its value and
582 section entry. So after alloc_dynrelocs only these values should
583 be used. In order to check whether a symbol is IFUNC use
584 s390_is_ifunc_symbol_p. */
585 bfd_vma ifunc_resolver_address;
586 asection *ifunc_resolver_section;
587 };
588
589 #define elf_s390_hash_entry(ent) \
590 ((struct elf_s390_link_hash_entry *)(ent))
591
592 /* This structure represents an entry in the local PLT list needed for
593 local IFUNC symbols. */
594 struct plt_entry
595 {
596 /* The section of the local symbol.
597 Set in relocate_section and used in finish_dynamic_sections. */
598 asection *sec;
599
600 union
601 {
602 bfd_signed_vma refcount;
603 bfd_vma offset;
604 } plt;
605 };
606
607 /* NOTE: Keep this structure in sync with
608 the one declared in elf32-s390.c. */
609 struct elf_s390_obj_tdata
610 {
611 struct elf_obj_tdata root;
612
613 /* A local PLT is needed for ifunc symbols. */
614 struct plt_entry *local_plt;
615
616 /* TLS type for each local got entry. */
617 char *local_got_tls_type;
618 };
619
620 #define elf_s390_tdata(abfd) \
621 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
622
623 #define elf_s390_local_plt(abfd) \
624 (elf_s390_tdata (abfd)->local_plt)
625
626 #define elf_s390_local_got_tls_type(abfd) \
627 (elf_s390_tdata (abfd)->local_got_tls_type)
628
629 #define is_s390_elf(bfd) \
630 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
631 && elf_tdata (bfd) != NULL \
632 && elf_object_id (bfd) == S390_ELF_DATA)
633
634 static bfd_boolean
635 elf_s390_mkobject (bfd *abfd)
636 {
637 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
638 S390_ELF_DATA);
639 }
640
641 static bfd_boolean
642 elf_s390_object_p (bfd *abfd)
643 {
644 /* Set the right machine number for an s390 elf32 file. */
645 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
646 }
647
648 /* s390 ELF linker hash table. */
649
650 struct elf_s390_link_hash_table
651 {
652 struct elf_link_hash_table elf;
653
654 /* Short-cuts to get to dynamic linker sections. */
655 asection *irelifunc;
656
657 union {
658 bfd_signed_vma refcount;
659 bfd_vma offset;
660 } tls_ldm_got;
661
662 /* Small local sym cache. */
663 struct sym_cache sym_cache;
664
665 /* Options passed from the linker. */
666 struct s390_elf_params *params;
667 };
668
669 /* Get the s390 ELF linker hash table from a link_info structure. */
670
671 #define elf_s390_hash_table(p) \
672 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
673 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
674
675 #define ELF64 1
676 #include "elf-s390-common.c"
677
678 /* Create an entry in an s390 ELF linker hash table. */
679
680 static struct bfd_hash_entry *
681 link_hash_newfunc (struct bfd_hash_entry *entry,
682 struct bfd_hash_table *table,
683 const char *string)
684 {
685 /* Allocate the structure if it has not already been allocated by a
686 subclass. */
687 if (entry == NULL)
688 {
689 entry = bfd_hash_allocate (table,
690 sizeof (struct elf_s390_link_hash_entry));
691 if (entry == NULL)
692 return entry;
693 }
694
695 /* Call the allocation method of the superclass. */
696 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
697 if (entry != NULL)
698 {
699 struct elf_s390_link_hash_entry *eh;
700
701 eh = (struct elf_s390_link_hash_entry *) entry;
702 eh->dyn_relocs = NULL;
703 eh->gotplt_refcount = 0;
704 eh->tls_type = GOT_UNKNOWN;
705 eh->ifunc_resolver_address = 0;
706 eh->ifunc_resolver_section = NULL;
707 }
708
709 return entry;
710 }
711
712 /* Create an s390 ELF linker hash table. */
713
714 static struct bfd_link_hash_table *
715 elf_s390_link_hash_table_create (bfd *abfd)
716 {
717 struct elf_s390_link_hash_table *ret;
718 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
719
720 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
721 if (ret == NULL)
722 return NULL;
723
724 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
725 sizeof (struct elf_s390_link_hash_entry),
726 S390_ELF_DATA))
727 {
728 free (ret);
729 return NULL;
730 }
731
732 return &ret->elf.root;
733 }
734
735 /* Copy the extra info we tack onto an elf_link_hash_entry. */
736
737 static void
738 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
739 struct elf_link_hash_entry *dir,
740 struct elf_link_hash_entry *ind)
741 {
742 struct elf_s390_link_hash_entry *edir, *eind;
743
744 edir = (struct elf_s390_link_hash_entry *) dir;
745 eind = (struct elf_s390_link_hash_entry *) ind;
746
747 if (eind->dyn_relocs != NULL)
748 {
749 if (edir->dyn_relocs != NULL)
750 {
751 struct elf_dyn_relocs **pp;
752 struct elf_dyn_relocs *p;
753
754 /* Add reloc counts against the indirect sym to the direct sym
755 list. Merge any entries against the same section. */
756 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
757 {
758 struct elf_dyn_relocs *q;
759
760 for (q = edir->dyn_relocs; q != NULL; q = q->next)
761 if (q->sec == p->sec)
762 {
763 q->pc_count += p->pc_count;
764 q->count += p->count;
765 *pp = p->next;
766 break;
767 }
768 if (q == NULL)
769 pp = &p->next;
770 }
771 *pp = edir->dyn_relocs;
772 }
773
774 edir->dyn_relocs = eind->dyn_relocs;
775 eind->dyn_relocs = NULL;
776 }
777
778 if (ind->root.type == bfd_link_hash_indirect
779 && dir->got.refcount <= 0)
780 {
781 edir->tls_type = eind->tls_type;
782 eind->tls_type = GOT_UNKNOWN;
783 }
784
785 if (ELIMINATE_COPY_RELOCS
786 && ind->root.type != bfd_link_hash_indirect
787 && dir->dynamic_adjusted)
788 {
789 /* If called to transfer flags for a weakdef during processing
790 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
791 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
792 if (dir->versioned != versioned_hidden)
793 dir->ref_dynamic |= ind->ref_dynamic;
794 dir->ref_regular |= ind->ref_regular;
795 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
796 dir->needs_plt |= ind->needs_plt;
797 }
798 else
799 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
800 }
801
802 static int
803 elf_s390_tls_transition (struct bfd_link_info *info,
804 int r_type,
805 int is_local)
806 {
807 if (bfd_link_pic (info))
808 return r_type;
809
810 switch (r_type)
811 {
812 case R_390_TLS_GD64:
813 case R_390_TLS_IE64:
814 if (is_local)
815 return R_390_TLS_LE64;
816 return R_390_TLS_IE64;
817 case R_390_TLS_GOTIE64:
818 if (is_local)
819 return R_390_TLS_LE64;
820 return R_390_TLS_GOTIE64;
821 case R_390_TLS_LDM64:
822 return R_390_TLS_LE64;
823 }
824
825 return r_type;
826 }
827
828 /* Look through the relocs for a section during the first phase, and
829 allocate space in the global offset table or procedure linkage
830 table. */
831
832 static bfd_boolean
833 elf_s390_check_relocs (bfd *abfd,
834 struct bfd_link_info *info,
835 asection *sec,
836 const Elf_Internal_Rela *relocs)
837 {
838 struct elf_s390_link_hash_table *htab;
839 Elf_Internal_Shdr *symtab_hdr;
840 struct elf_link_hash_entry **sym_hashes;
841 const Elf_Internal_Rela *rel;
842 const Elf_Internal_Rela *rel_end;
843 asection *sreloc;
844 bfd_signed_vma *local_got_refcounts;
845 int tls_type, old_tls_type;
846
847 if (bfd_link_relocatable (info))
848 return TRUE;
849
850 BFD_ASSERT (is_s390_elf (abfd));
851
852 htab = elf_s390_hash_table (info);
853 if (htab == NULL)
854 return FALSE;
855
856 symtab_hdr = &elf_symtab_hdr (abfd);
857 sym_hashes = elf_sym_hashes (abfd);
858 local_got_refcounts = elf_local_got_refcounts (abfd);
859
860 sreloc = NULL;
861
862 rel_end = relocs + sec->reloc_count;
863 for (rel = relocs; rel < rel_end; rel++)
864 {
865 unsigned int r_type;
866 unsigned int r_symndx;
867 struct elf_link_hash_entry *h;
868 Elf_Internal_Sym *isym;
869
870 r_symndx = ELF64_R_SYM (rel->r_info);
871
872 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
873 {
874 /* xgettext:c-format */
875 _bfd_error_handler (_("%B: bad symbol index: %d"),
876 abfd, r_symndx);
877 return FALSE;
878 }
879
880 if (r_symndx < symtab_hdr->sh_info)
881 {
882 /* A local symbol. */
883 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
884 abfd, r_symndx);
885 if (isym == NULL)
886 return FALSE;
887
888 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
889 {
890 struct plt_entry *plt;
891
892 if (htab->elf.dynobj == NULL)
893 htab->elf.dynobj = abfd;
894
895 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
896 return FALSE;
897
898 if (local_got_refcounts == NULL)
899 {
900 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
901 return FALSE;
902 local_got_refcounts = elf_local_got_refcounts (abfd);
903 }
904 plt = elf_s390_local_plt (abfd);
905 plt[r_symndx].plt.refcount++;
906 }
907 h = NULL;
908 }
909 else
910 {
911 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
912 while (h->root.type == bfd_link_hash_indirect
913 || h->root.type == bfd_link_hash_warning)
914 h = (struct elf_link_hash_entry *) h->root.u.i.link;
915
916 /* PR15323, ref flags aren't set for references in the same
917 object. */
918 h->root.non_ir_ref_regular = 1;
919 }
920
921 /* Create got section and local_got_refcounts array if they
922 are needed. */
923 r_type = elf_s390_tls_transition (info,
924 ELF64_R_TYPE (rel->r_info),
925 h == NULL);
926 switch (r_type)
927 {
928 case R_390_GOT12:
929 case R_390_GOT16:
930 case R_390_GOT20:
931 case R_390_GOT32:
932 case R_390_GOT64:
933 case R_390_GOTENT:
934 case R_390_GOTPLT12:
935 case R_390_GOTPLT16:
936 case R_390_GOTPLT20:
937 case R_390_GOTPLT32:
938 case R_390_GOTPLT64:
939 case R_390_GOTPLTENT:
940 case R_390_TLS_GD64:
941 case R_390_TLS_GOTIE12:
942 case R_390_TLS_GOTIE20:
943 case R_390_TLS_GOTIE64:
944 case R_390_TLS_IEENT:
945 case R_390_TLS_IE64:
946 case R_390_TLS_LDM64:
947 if (h == NULL
948 && local_got_refcounts == NULL)
949 {
950 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
951 return FALSE;
952 local_got_refcounts = elf_local_got_refcounts (abfd);
953 }
954
955 /* Fall through. */
956 case R_390_GOTOFF16:
957 case R_390_GOTOFF32:
958 case R_390_GOTOFF64:
959 case R_390_GOTPC:
960 case R_390_GOTPCDBL:
961 if (htab->elf.sgot == NULL)
962 {
963 if (htab->elf.dynobj == NULL)
964 htab->elf.dynobj = abfd;
965 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
966 return FALSE;
967 }
968 }
969
970 if (h != NULL)
971 {
972 if (htab->elf.dynobj == NULL)
973 htab->elf.dynobj = abfd;
974 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
975 return FALSE;
976
977 /* Make sure an IFUNC symbol defined in a non-shared object
978 always gets a PLT slot. */
979 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
980 {
981 /* The symbol is called by the dynamic loader in order
982 to resolve the relocation. So it is in fact also
983 referenced. */
984 h->ref_regular = 1;
985 h->needs_plt = 1;
986 }
987 }
988
989 switch (r_type)
990 {
991 case R_390_GOTPC:
992 case R_390_GOTPCDBL:
993 /* These relocs do not need a GOT slot. They just load the
994 GOT pointer itself or address something else relative to
995 the GOT. Since the GOT pointer has been set up above we
996 are done. */
997 break;
998 case R_390_GOTOFF16:
999 case R_390_GOTOFF32:
1000 case R_390_GOTOFF64:
1001 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1002 break;
1003 /* Fall through. */
1004
1005 case R_390_PLT12DBL:
1006 case R_390_PLT16DBL:
1007 case R_390_PLT24DBL:
1008 case R_390_PLT32:
1009 case R_390_PLT32DBL:
1010 case R_390_PLT64:
1011 case R_390_PLTOFF16:
1012 case R_390_PLTOFF32:
1013 case R_390_PLTOFF64:
1014 /* This symbol requires a procedure linkage table entry. We
1015 actually build the entry in adjust_dynamic_symbol,
1016 because this might be a case of linking PIC code which is
1017 never referenced by a dynamic object, in which case we
1018 don't need to generate a procedure linkage table entry
1019 after all. */
1020
1021 /* If this is a local symbol, we resolve it directly without
1022 creating a procedure linkage table entry. */
1023 if (h != NULL)
1024 {
1025 h->needs_plt = 1;
1026 h->plt.refcount += 1;
1027 }
1028 break;
1029
1030 case R_390_GOTPLT12:
1031 case R_390_GOTPLT16:
1032 case R_390_GOTPLT20:
1033 case R_390_GOTPLT32:
1034 case R_390_GOTPLT64:
1035 case R_390_GOTPLTENT:
1036 /* This symbol requires either a procedure linkage table entry
1037 or an entry in the local got. We actually build the entry
1038 in adjust_dynamic_symbol because whether this is really a
1039 global reference can change and with it the fact if we have
1040 to create a plt entry or a local got entry. To be able to
1041 make a once global symbol a local one we have to keep track
1042 of the number of gotplt references that exist for this
1043 symbol. */
1044 if (h != NULL)
1045 {
1046 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1047 h->needs_plt = 1;
1048 h->plt.refcount += 1;
1049 }
1050 else
1051 local_got_refcounts[r_symndx] += 1;
1052 break;
1053
1054 case R_390_TLS_LDM64:
1055 htab->tls_ldm_got.refcount += 1;
1056 break;
1057
1058 case R_390_TLS_IE64:
1059 case R_390_TLS_GOTIE12:
1060 case R_390_TLS_GOTIE20:
1061 case R_390_TLS_GOTIE64:
1062 case R_390_TLS_IEENT:
1063 if (bfd_link_pic (info))
1064 info->flags |= DF_STATIC_TLS;
1065 /* Fall through */
1066
1067 case R_390_GOT12:
1068 case R_390_GOT16:
1069 case R_390_GOT20:
1070 case R_390_GOT32:
1071 case R_390_GOT64:
1072 case R_390_GOTENT:
1073 case R_390_TLS_GD64:
1074 /* This symbol requires a global offset table entry. */
1075 switch (r_type)
1076 {
1077 default:
1078 case R_390_GOT12:
1079 case R_390_GOT16:
1080 case R_390_GOT20:
1081 case R_390_GOT32:
1082 case R_390_GOTENT:
1083 tls_type = GOT_NORMAL;
1084 break;
1085 case R_390_TLS_GD64:
1086 tls_type = GOT_TLS_GD;
1087 break;
1088 case R_390_TLS_IE64:
1089 case R_390_TLS_GOTIE64:
1090 tls_type = GOT_TLS_IE;
1091 break;
1092 case R_390_TLS_GOTIE12:
1093 case R_390_TLS_GOTIE20:
1094 case R_390_TLS_IEENT:
1095 tls_type = GOT_TLS_IE_NLT;
1096 break;
1097 }
1098
1099 if (h != NULL)
1100 {
1101 h->got.refcount += 1;
1102 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1103 }
1104 else
1105 {
1106 local_got_refcounts[r_symndx] += 1;
1107 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1108 }
1109 /* If a TLS symbol is accessed using IE at least once,
1110 there is no point to use dynamic model for it. */
1111 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1112 {
1113 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1114 {
1115 _bfd_error_handler
1116 /* xgettext:c-format */
1117 (_("%B: `%s' accessed both as normal and thread local symbol"),
1118 abfd, h->root.root.string);
1119 return FALSE;
1120 }
1121 if (old_tls_type > tls_type)
1122 tls_type = old_tls_type;
1123 }
1124
1125 if (old_tls_type != tls_type)
1126 {
1127 if (h != NULL)
1128 elf_s390_hash_entry (h)->tls_type = tls_type;
1129 else
1130 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1131 }
1132
1133 if (r_type != R_390_TLS_IE64)
1134 break;
1135 /* Fall through */
1136
1137 case R_390_TLS_LE64:
1138 /* For static linking and executables this reloc will be
1139 calculated at linktime otherwise a TLS_TPOFF runtime
1140 reloc will be generated. */
1141 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1142 break;
1143
1144 if (!bfd_link_pic (info))
1145 break;
1146 info->flags |= DF_STATIC_TLS;
1147 /* Fall through */
1148
1149 case R_390_8:
1150 case R_390_16:
1151 case R_390_32:
1152 case R_390_64:
1153 case R_390_PC12DBL:
1154 case R_390_PC16:
1155 case R_390_PC16DBL:
1156 case R_390_PC24DBL:
1157 case R_390_PC32:
1158 case R_390_PC32DBL:
1159 case R_390_PC64:
1160 if (h != NULL && bfd_link_executable (info))
1161 {
1162 /* If this reloc is in a read-only section, we might
1163 need a copy reloc. We can't check reliably at this
1164 stage whether the section is read-only, as input
1165 sections have not yet been mapped to output sections.
1166 Tentatively set the flag for now, and correct in
1167 adjust_dynamic_symbol. */
1168 h->non_got_ref = 1;
1169
1170 if (!bfd_link_pic (info))
1171 {
1172 /* We may need a .plt entry if the function this reloc
1173 refers to is in a shared lib. */
1174 h->plt.refcount += 1;
1175 }
1176 }
1177
1178 /* If we are creating a shared library, and this is a reloc
1179 against a global symbol, or a non PC relative reloc
1180 against a local symbol, then we need to copy the reloc
1181 into the shared library. However, if we are linking with
1182 -Bsymbolic, we do not need to copy a reloc against a
1183 global symbol which is defined in an object we are
1184 including in the link (i.e., DEF_REGULAR is set). At
1185 this point we have not seen all the input files, so it is
1186 possible that DEF_REGULAR is not set now but will be set
1187 later (it is never cleared). In case of a weak definition,
1188 DEF_REGULAR may be cleared later by a strong definition in
1189 a shared library. We account for that possibility below by
1190 storing information in the relocs_copied field of the hash
1191 table entry. A similar situation occurs when creating
1192 shared libraries and symbol visibility changes render the
1193 symbol local.
1194
1195 If on the other hand, we are creating an executable, we
1196 may need to keep relocations for symbols satisfied by a
1197 dynamic library if we manage to avoid copy relocs for the
1198 symbol. */
1199 if ((bfd_link_pic (info)
1200 && (sec->flags & SEC_ALLOC) != 0
1201 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1202 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1203 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1204 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1207 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1208 || (h != NULL
1209 && (! SYMBOLIC_BIND (info, h)
1210 || h->root.type == bfd_link_hash_defweak
1211 || !h->def_regular))))
1212 || (ELIMINATE_COPY_RELOCS
1213 && !bfd_link_pic (info)
1214 && (sec->flags & SEC_ALLOC) != 0
1215 && h != NULL
1216 && (h->root.type == bfd_link_hash_defweak
1217 || !h->def_regular)))
1218 {
1219 struct elf_dyn_relocs *p;
1220 struct elf_dyn_relocs **head;
1221
1222 /* We must copy these reloc types into the output file.
1223 Create a reloc section in dynobj and make room for
1224 this reloc. */
1225 if (sreloc == NULL)
1226 {
1227 if (htab->elf.dynobj == NULL)
1228 htab->elf.dynobj = abfd;
1229
1230 sreloc = _bfd_elf_make_dynamic_reloc_section
1231 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1232
1233 if (sreloc == NULL)
1234 return FALSE;
1235 }
1236
1237 /* If this is a global symbol, we count the number of
1238 relocations we need for this symbol. */
1239 if (h != NULL)
1240 {
1241 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1242 }
1243 else
1244 {
1245 /* Track dynamic relocs needed for local syms too.
1246 We really need local syms available to do this
1247 easily. Oh well. */
1248 asection *s;
1249 void *vpp;
1250
1251 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1252 abfd, r_symndx);
1253 if (isym == NULL)
1254 return FALSE;
1255
1256 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1257 if (s == NULL)
1258 s = sec;
1259
1260 vpp = &elf_section_data (s)->local_dynrel;
1261 head = (struct elf_dyn_relocs **) vpp;
1262 }
1263
1264 p = *head;
1265 if (p == NULL || p->sec != sec)
1266 {
1267 bfd_size_type amt = sizeof *p;
1268 p = ((struct elf_dyn_relocs *)
1269 bfd_alloc (htab->elf.dynobj, amt));
1270 if (p == NULL)
1271 return FALSE;
1272 p->next = *head;
1273 *head = p;
1274 p->sec = sec;
1275 p->count = 0;
1276 p->pc_count = 0;
1277 }
1278
1279 p->count += 1;
1280 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1281 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1282 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1283 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1284 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1285 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1286 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1287 p->pc_count += 1;
1288 }
1289 break;
1290
1291 /* This relocation describes the C++ object vtable hierarchy.
1292 Reconstruct it for later use during GC. */
1293 case R_390_GNU_VTINHERIT:
1294 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1295 return FALSE;
1296 break;
1297
1298 /* This relocation describes which C++ vtable entries are actually
1299 used. Record for later use during GC. */
1300 case R_390_GNU_VTENTRY:
1301 BFD_ASSERT (h != NULL);
1302 if (h != NULL
1303 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1304 return FALSE;
1305 break;
1306
1307 default:
1308 break;
1309 }
1310 }
1311
1312 return TRUE;
1313 }
1314
1315 /* Return the section that should be marked against GC for a given
1316 relocation. */
1317
1318 static asection *
1319 elf_s390_gc_mark_hook (asection *sec,
1320 struct bfd_link_info *info,
1321 Elf_Internal_Rela *rel,
1322 struct elf_link_hash_entry *h,
1323 Elf_Internal_Sym *sym)
1324 {
1325 if (h != NULL)
1326 switch (ELF64_R_TYPE (rel->r_info))
1327 {
1328 case R_390_GNU_VTINHERIT:
1329 case R_390_GNU_VTENTRY:
1330 return NULL;
1331 }
1332
1333 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1334 }
1335
1336 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1337 entry but we found we will not create any. Called when we find we will
1338 not have any PLT for this symbol, by for example
1339 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1340 or elf_s390_size_dynamic_sections if no dynamic sections will be
1341 created (we're only linking static objects). */
1342
1343 static void
1344 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1345 {
1346 if (h->elf.root.type == bfd_link_hash_warning)
1347 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1348
1349 if (h->gotplt_refcount <= 0)
1350 return;
1351
1352 /* We simply add the number of gotplt references to the number
1353 * of got references for this symbol. */
1354 h->elf.got.refcount += h->gotplt_refcount;
1355 h->gotplt_refcount = -1;
1356 }
1357
1358 /* Adjust a symbol defined by a dynamic object and referenced by a
1359 regular object. The current definition is in some section of the
1360 dynamic object, but we're not including those sections. We have to
1361 change the definition to something the rest of the link can
1362 understand. */
1363
1364 static bfd_boolean
1365 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1366 struct elf_link_hash_entry *h)
1367 {
1368 struct elf_s390_link_hash_table *htab;
1369 asection *s, *srel;
1370
1371 /* STT_GNU_IFUNC symbol must go through PLT. */
1372 if (s390_is_ifunc_symbol_p (h))
1373 {
1374 /* All local STT_GNU_IFUNC references must be treated as local
1375 calls via local PLT. */
1376 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1377 {
1378 bfd_size_type pc_count = 0, count = 0;
1379 struct elf_dyn_relocs **pp;
1380 struct elf_s390_link_hash_entry *eh;
1381 struct elf_dyn_relocs *p;
1382
1383 eh = (struct elf_s390_link_hash_entry *) h;
1384 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1385 {
1386 pc_count += p->pc_count;
1387 p->count -= p->pc_count;
1388 p->pc_count = 0;
1389 count += p->count;
1390 if (p->count == 0)
1391 *pp = p->next;
1392 else
1393 pp = &p->next;
1394 }
1395
1396 if (pc_count || count)
1397 {
1398 h->needs_plt = 1;
1399 h->non_got_ref = 1;
1400 if (h->plt.refcount <= 0)
1401 h->plt.refcount = 1;
1402 else
1403 h->plt.refcount += 1;
1404 }
1405 }
1406
1407 if (h->plt.refcount <= 0)
1408 {
1409 h->plt.offset = (bfd_vma) -1;
1410 h->needs_plt = 0;
1411 }
1412 return TRUE;
1413 }
1414
1415 /* If this is a function, put it in the procedure linkage table. We
1416 will fill in the contents of the procedure linkage table later
1417 (although we could actually do it here). */
1418 if (h->type == STT_FUNC
1419 || h->needs_plt)
1420 {
1421 if (h->plt.refcount <= 0
1422 || SYMBOL_CALLS_LOCAL (info, h)
1423 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1424 && h->root.type == bfd_link_hash_undefweak))
1425 {
1426 /* This case can occur if we saw a PLT32 reloc in an input
1427 file, but the symbol was never referred to by a dynamic
1428 object, or if all references were garbage collected. In
1429 such a case, we don't actually need to build a procedure
1430 linkage table, and we can just do a PC32 reloc instead. */
1431 h->plt.offset = (bfd_vma) -1;
1432 h->needs_plt = 0;
1433 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1434 }
1435
1436 return TRUE;
1437 }
1438 else
1439 /* It's possible that we incorrectly decided a .plt reloc was
1440 needed for an R_390_PC32 reloc to a non-function sym in
1441 check_relocs. We can't decide accurately between function and
1442 non-function syms in check-relocs; Objects loaded later in
1443 the link may change h->type. So fix it now. */
1444 h->plt.offset = (bfd_vma) -1;
1445
1446 /* If this is a weak symbol, and there is a real definition, the
1447 processor independent code will have arranged for us to see the
1448 real definition first, and we can just use the same value. */
1449 if (h->u.weakdef != NULL)
1450 {
1451 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1452 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1453 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1454 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1455 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1456 h->non_got_ref = h->u.weakdef->non_got_ref;
1457 return TRUE;
1458 }
1459
1460 /* This is a reference to a symbol defined by a dynamic object which
1461 is not a function. */
1462
1463 /* If we are creating a shared library, we must presume that the
1464 only references to the symbol are via the global offset table.
1465 For such cases we need not do anything here; the relocations will
1466 be handled correctly by relocate_section. */
1467 if (bfd_link_pic (info))
1468 return TRUE;
1469
1470 /* If there are no references to this symbol that do not use the
1471 GOT, we don't need to generate a copy reloc. */
1472 if (!h->non_got_ref)
1473 return TRUE;
1474
1475 /* If -z nocopyreloc was given, we won't generate them either. */
1476 if (info->nocopyreloc)
1477 {
1478 h->non_got_ref = 0;
1479 return TRUE;
1480 }
1481
1482 if (ELIMINATE_COPY_RELOCS)
1483 {
1484 struct elf_s390_link_hash_entry * eh;
1485 struct elf_dyn_relocs *p;
1486
1487 eh = (struct elf_s390_link_hash_entry *) h;
1488 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1489 {
1490 s = p->sec->output_section;
1491 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1492 break;
1493 }
1494
1495 /* If we didn't find any dynamic relocs in read-only sections, then
1496 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1497 if (p == NULL)
1498 {
1499 h->non_got_ref = 0;
1500 return TRUE;
1501 }
1502 }
1503
1504 /* We must allocate the symbol in our .dynbss section, which will
1505 become part of the .bss section of the executable. There will be
1506 an entry for this symbol in the .dynsym section. The dynamic
1507 object will contain position independent code, so all references
1508 from the dynamic object to this symbol will go through the global
1509 offset table. The dynamic linker will use the .dynsym entry to
1510 determine the address it must put in the global offset table, so
1511 both the dynamic object and the regular object will refer to the
1512 same memory location for the variable. */
1513
1514 htab = elf_s390_hash_table (info);
1515 if (htab == NULL)
1516 return FALSE;
1517
1518 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1519 copy the initial value out of the dynamic object and into the
1520 runtime process image. */
1521 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1522 {
1523 s = htab->elf.sdynrelro;
1524 srel = htab->elf.sreldynrelro;
1525 }
1526 else
1527 {
1528 s = htab->elf.sdynbss;
1529 srel = htab->elf.srelbss;
1530 }
1531 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1532 {
1533 srel->size += sizeof (Elf64_External_Rela);
1534 h->needs_copy = 1;
1535 }
1536
1537 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1538 }
1539
1540 /* Allocate space in .plt, .got and associated reloc sections for
1541 dynamic relocs. */
1542
1543 static bfd_boolean
1544 allocate_dynrelocs (struct elf_link_hash_entry *h,
1545 void * inf)
1546 {
1547 struct bfd_link_info *info;
1548 struct elf_s390_link_hash_table *htab;
1549 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1550 struct elf_dyn_relocs *p;
1551
1552 if (h->root.type == bfd_link_hash_indirect)
1553 return TRUE;
1554
1555 info = (struct bfd_link_info *) inf;
1556 htab = elf_s390_hash_table (info);
1557 if (htab == NULL)
1558 return FALSE;
1559
1560 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1561 here if it is defined and referenced in a non-shared object. */
1562 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1563 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1564 else if (htab->elf.dynamic_sections_created
1565 && h->plt.refcount > 0)
1566 {
1567 /* Make sure this symbol is output as a dynamic symbol.
1568 Undefined weak syms won't yet be marked as dynamic. */
1569 if (h->dynindx == -1
1570 && !h->forced_local)
1571 {
1572 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1573 return FALSE;
1574 }
1575
1576 if (bfd_link_pic (info)
1577 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1578 {
1579 asection *s = htab->elf.splt;
1580
1581 /* If this is the first .plt entry, make room for the special
1582 first entry. */
1583 if (s->size == 0)
1584 s->size += PLT_FIRST_ENTRY_SIZE;
1585
1586 h->plt.offset = s->size;
1587
1588 /* If this symbol is not defined in a regular file, and we are
1589 not generating a shared library, then set the symbol to this
1590 location in the .plt. This is required to make function
1591 pointers compare as equal between the normal executable and
1592 the shared library. */
1593 if (! bfd_link_pic (info)
1594 && !h->def_regular)
1595 {
1596 h->root.u.def.section = s;
1597 h->root.u.def.value = h->plt.offset;
1598 }
1599
1600 /* Make room for this entry. */
1601 s->size += PLT_ENTRY_SIZE;
1602
1603 /* We also need to make an entry in the .got.plt section, which
1604 will be placed in the .got section by the linker script. */
1605 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1606
1607 /* We also need to make an entry in the .rela.plt section. */
1608 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1609 }
1610 else
1611 {
1612 h->plt.offset = (bfd_vma) -1;
1613 h->needs_plt = 0;
1614 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1615 }
1616 }
1617 else
1618 {
1619 h->plt.offset = (bfd_vma) -1;
1620 h->needs_plt = 0;
1621 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1622 }
1623
1624 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1625 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1626 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1627 we can save the dynamic TLS relocation. */
1628 if (h->got.refcount > 0
1629 && !bfd_link_pic (info)
1630 && h->dynindx == -1
1631 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1632 {
1633 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1634 /* For the GOTIE access without a literal pool entry the offset has
1635 to be stored somewhere. The immediate value in the instruction
1636 is not bit enough so the value is stored in the got. */
1637 {
1638 h->got.offset = htab->elf.sgot->size;
1639 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1640 }
1641 else
1642 h->got.offset = (bfd_vma) -1;
1643 }
1644 else if (h->got.refcount > 0)
1645 {
1646 asection *s;
1647 bfd_boolean dyn;
1648 int tls_type = elf_s390_hash_entry(h)->tls_type;
1649
1650 /* Make sure this symbol is output as a dynamic symbol.
1651 Undefined weak syms won't yet be marked as dynamic. */
1652 if (h->dynindx == -1
1653 && !h->forced_local)
1654 {
1655 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1656 return FALSE;
1657 }
1658
1659 s = htab->elf.sgot;
1660 h->got.offset = s->size;
1661 s->size += GOT_ENTRY_SIZE;
1662 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1663 if (tls_type == GOT_TLS_GD)
1664 s->size += GOT_ENTRY_SIZE;
1665 dyn = htab->elf.dynamic_sections_created;
1666 /* R_390_TLS_IE64 needs one dynamic relocation,
1667 R_390_TLS_GD64 needs one if local symbol and two if global. */
1668 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1669 || tls_type >= GOT_TLS_IE)
1670 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1671 else if (tls_type == GOT_TLS_GD)
1672 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1673 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1674 || h->root.type != bfd_link_hash_undefweak)
1675 && (bfd_link_pic (info)
1676 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1677 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1678 }
1679 else
1680 h->got.offset = (bfd_vma) -1;
1681
1682 if (eh->dyn_relocs == NULL)
1683 return TRUE;
1684
1685 /* In the shared -Bsymbolic case, discard space allocated for
1686 dynamic pc-relative relocs against symbols which turn out to be
1687 defined in regular objects. For the normal shared case, discard
1688 space for pc-relative relocs that have become local due to symbol
1689 visibility changes. */
1690
1691 if (bfd_link_pic (info))
1692 {
1693 if (SYMBOL_CALLS_LOCAL (info, h))
1694 {
1695 struct elf_dyn_relocs **pp;
1696
1697 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1698 {
1699 p->count -= p->pc_count;
1700 p->pc_count = 0;
1701 if (p->count == 0)
1702 *pp = p->next;
1703 else
1704 pp = &p->next;
1705 }
1706 }
1707
1708 /* Also discard relocs on undefined weak syms with non-default
1709 visibility. */
1710 if (eh->dyn_relocs != NULL
1711 && h->root.type == bfd_link_hash_undefweak)
1712 {
1713 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1714 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1715 eh->dyn_relocs = NULL;
1716
1717 /* Make sure undefined weak symbols are output as a dynamic
1718 symbol in PIEs. */
1719 else if (h->dynindx == -1
1720 && !h->forced_local)
1721 {
1722 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1723 return FALSE;
1724 }
1725 }
1726 }
1727 else if (ELIMINATE_COPY_RELOCS)
1728 {
1729 /* For the non-shared case, discard space for relocs against
1730 symbols which turn out to need copy relocs or are not
1731 dynamic. */
1732
1733 if (!h->non_got_ref
1734 && ((h->def_dynamic
1735 && !h->def_regular)
1736 || (htab->elf.dynamic_sections_created
1737 && (h->root.type == bfd_link_hash_undefweak
1738 || h->root.type == bfd_link_hash_undefined))))
1739 {
1740 /* Make sure this symbol is output as a dynamic symbol.
1741 Undefined weak syms won't yet be marked as dynamic. */
1742 if (h->dynindx == -1
1743 && !h->forced_local)
1744 {
1745 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1746 return FALSE;
1747 }
1748
1749 /* If that succeeded, we know we'll be keeping all the
1750 relocs. */
1751 if (h->dynindx != -1)
1752 goto keep;
1753 }
1754
1755 eh->dyn_relocs = NULL;
1756
1757 keep: ;
1758 }
1759
1760 /* Finally, allocate space. */
1761 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1762 {
1763 asection *sreloc = elf_section_data (p->sec)->sreloc;
1764 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1765 }
1766
1767 return TRUE;
1768 }
1769
1770 /* Find any dynamic relocs that apply to read-only sections. */
1771
1772 static bfd_boolean
1773 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1774 {
1775 struct elf_s390_link_hash_entry *eh;
1776 struct elf_dyn_relocs *p;
1777
1778 eh = (struct elf_s390_link_hash_entry *) h;
1779 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1780 {
1781 asection *s = p->sec->output_section;
1782
1783 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1784 {
1785 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1786
1787 info->flags |= DF_TEXTREL;
1788
1789 /* Not an error, just cut short the traversal. */
1790 return FALSE;
1791 }
1792 }
1793 return TRUE;
1794 }
1795
1796 /* Set the sizes of the dynamic sections. */
1797
1798 static bfd_boolean
1799 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1800 struct bfd_link_info *info)
1801 {
1802 struct elf_s390_link_hash_table *htab;
1803 bfd *dynobj;
1804 asection *s;
1805 bfd_boolean relocs;
1806 bfd *ibfd;
1807
1808 htab = elf_s390_hash_table (info);
1809 if (htab == NULL)
1810 return FALSE;
1811
1812 dynobj = htab->elf.dynobj;
1813 if (dynobj == NULL)
1814 abort ();
1815
1816 if (htab->elf.dynamic_sections_created)
1817 {
1818 /* Set the contents of the .interp section to the interpreter. */
1819 if (bfd_link_executable (info) && !info->nointerp)
1820 {
1821 s = bfd_get_linker_section (dynobj, ".interp");
1822 if (s == NULL)
1823 abort ();
1824 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1825 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1826 }
1827 }
1828
1829 /* Set up .got offsets for local syms, and space for local dynamic
1830 relocs. */
1831 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1832 {
1833 bfd_signed_vma *local_got;
1834 bfd_signed_vma *end_local_got;
1835 char *local_tls_type;
1836 bfd_size_type locsymcount;
1837 Elf_Internal_Shdr *symtab_hdr;
1838 asection *srela;
1839 struct plt_entry *local_plt;
1840 unsigned int i;
1841
1842 if (! is_s390_elf (ibfd))
1843 continue;
1844
1845 for (s = ibfd->sections; s != NULL; s = s->next)
1846 {
1847 struct elf_dyn_relocs *p;
1848
1849 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1850 {
1851 if (!bfd_is_abs_section (p->sec)
1852 && bfd_is_abs_section (p->sec->output_section))
1853 {
1854 /* Input section has been discarded, either because
1855 it is a copy of a linkonce section or due to
1856 linker script /DISCARD/, so we'll be discarding
1857 the relocs too. */
1858 }
1859 else if (p->count != 0)
1860 {
1861 srela = elf_section_data (p->sec)->sreloc;
1862 srela->size += p->count * sizeof (Elf64_External_Rela);
1863 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1864 info->flags |= DF_TEXTREL;
1865 }
1866 }
1867 }
1868
1869 local_got = elf_local_got_refcounts (ibfd);
1870 if (!local_got)
1871 continue;
1872
1873 symtab_hdr = &elf_symtab_hdr (ibfd);
1874 locsymcount = symtab_hdr->sh_info;
1875 end_local_got = local_got + locsymcount;
1876 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1877 s = htab->elf.sgot;
1878 srela = htab->elf.srelgot;
1879 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1880 {
1881 if (*local_got > 0)
1882 {
1883 *local_got = s->size;
1884 s->size += GOT_ENTRY_SIZE;
1885 if (*local_tls_type == GOT_TLS_GD)
1886 s->size += GOT_ENTRY_SIZE;
1887 if (bfd_link_pic (info))
1888 srela->size += sizeof (Elf64_External_Rela);
1889 }
1890 else
1891 *local_got = (bfd_vma) -1;
1892 }
1893
1894 local_plt = elf_s390_local_plt (ibfd);
1895 for (i = 0; i < symtab_hdr->sh_info; i++)
1896 {
1897 if (local_plt[i].plt.refcount > 0)
1898 {
1899 local_plt[i].plt.offset = htab->elf.iplt->size;
1900 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1901 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1902 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1903 }
1904 else
1905 local_plt[i].plt.offset = (bfd_vma) -1;
1906 }
1907 }
1908
1909 if (htab->tls_ldm_got.refcount > 0)
1910 {
1911 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1912 relocs. */
1913 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1914 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1915 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1916 }
1917 else
1918 htab->tls_ldm_got.offset = -1;
1919
1920 /* Allocate global sym .plt and .got entries, and space for global
1921 sym dynamic relocs. */
1922 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1923
1924 /* We now have determined the sizes of the various dynamic sections.
1925 Allocate memory for them. */
1926 relocs = FALSE;
1927 for (s = dynobj->sections; s != NULL; s = s->next)
1928 {
1929 if ((s->flags & SEC_LINKER_CREATED) == 0)
1930 continue;
1931
1932 if (s == htab->elf.splt
1933 || s == htab->elf.sgot
1934 || s == htab->elf.sgotplt
1935 || s == htab->elf.sdynbss
1936 || s == htab->elf.sdynrelro
1937 || s == htab->elf.iplt
1938 || s == htab->elf.igotplt
1939 || s == htab->irelifunc)
1940 {
1941 /* Strip this section if we don't need it; see the
1942 comment below. */
1943 }
1944 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
1945 {
1946 if (s->size != 0 && s != htab->elf.srelplt)
1947 relocs = TRUE;
1948
1949 /* We use the reloc_count field as a counter if we need
1950 to copy relocs into the output file. */
1951 s->reloc_count = 0;
1952 }
1953 else
1954 {
1955 /* It's not one of our sections, so don't allocate space. */
1956 continue;
1957 }
1958
1959 if (s->size == 0)
1960 {
1961 /* If we don't need this section, strip it from the
1962 output file. This is to handle .rela.bss and
1963 .rela.plt. We must create it in
1964 create_dynamic_sections, because it must be created
1965 before the linker maps input sections to output
1966 sections. The linker does that before
1967 adjust_dynamic_symbol is called, and it is that
1968 function which decides whether anything needs to go
1969 into these sections. */
1970
1971 s->flags |= SEC_EXCLUDE;
1972 continue;
1973 }
1974
1975 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1976 continue;
1977
1978 /* Allocate memory for the section contents. We use bfd_zalloc
1979 here in case unused entries are not reclaimed before the
1980 section's contents are written out. This should not happen,
1981 but this way if it does, we get a R_390_NONE reloc instead
1982 of garbage. */
1983 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1984 if (s->contents == NULL)
1985 return FALSE;
1986 }
1987
1988 if (htab->elf.dynamic_sections_created)
1989 {
1990 /* Add some entries to the .dynamic section. We fill in the
1991 values later, in elf_s390_finish_dynamic_sections, but we
1992 must add the entries now so that we get the correct size for
1993 the .dynamic section. The DT_DEBUG entry is filled in by the
1994 dynamic linker and used by the debugger. */
1995 #define add_dynamic_entry(TAG, VAL) \
1996 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1997
1998 if (bfd_link_executable (info))
1999 {
2000 if (!add_dynamic_entry (DT_DEBUG, 0))
2001 return FALSE;
2002 }
2003
2004 if (htab->elf.splt->size != 0)
2005 {
2006 if (!add_dynamic_entry (DT_PLTGOT, 0)
2007 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2008 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2009 || !add_dynamic_entry (DT_JMPREL, 0))
2010 return FALSE;
2011 }
2012
2013 if (relocs)
2014 {
2015 if (!add_dynamic_entry (DT_RELA, 0)
2016 || !add_dynamic_entry (DT_RELASZ, 0)
2017 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2018 return FALSE;
2019
2020 /* If any dynamic relocs apply to a read-only section,
2021 then we need a DT_TEXTREL entry. */
2022 if ((info->flags & DF_TEXTREL) == 0)
2023 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2024 info);
2025
2026 if ((info->flags & DF_TEXTREL) != 0)
2027 {
2028 if (!add_dynamic_entry (DT_TEXTREL, 0))
2029 return FALSE;
2030 }
2031 }
2032 }
2033 #undef add_dynamic_entry
2034
2035 return TRUE;
2036 }
2037
2038 /* Return the base VMA address which should be subtracted from real addresses
2039 when resolving @dtpoff relocation.
2040 This is PT_TLS segment p_vaddr. */
2041
2042 static bfd_vma
2043 dtpoff_base (struct bfd_link_info *info)
2044 {
2045 /* If tls_sec is NULL, we should have signalled an error already. */
2046 if (elf_hash_table (info)->tls_sec == NULL)
2047 return 0;
2048 return elf_hash_table (info)->tls_sec->vma;
2049 }
2050
2051 /* Return the relocation value for @tpoff relocation
2052 if STT_TLS virtual address is ADDRESS. */
2053
2054 static bfd_vma
2055 tpoff (struct bfd_link_info *info, bfd_vma address)
2056 {
2057 struct elf_link_hash_table *htab = elf_hash_table (info);
2058
2059 /* If tls_sec is NULL, we should have signalled an error already. */
2060 if (htab->tls_sec == NULL)
2061 return 0;
2062 return htab->tls_size + htab->tls_sec->vma - address;
2063 }
2064
2065 /* Complain if TLS instruction relocation is against an invalid
2066 instruction. */
2067
2068 static void
2069 invalid_tls_insn (bfd *input_bfd,
2070 asection *input_section,
2071 Elf_Internal_Rela *rel)
2072 {
2073 reloc_howto_type *howto;
2074
2075 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2076 _bfd_error_handler
2077 /* xgettext:c-format */
2078 (_("%B(%A+%#Lx): invalid instruction for TLS relocation %s"),
2079 input_bfd,
2080 input_section,
2081 rel->r_offset,
2082 howto->name);
2083 bfd_set_error (bfd_error_bad_value);
2084 }
2085
2086 /* Relocate a 390 ELF section. */
2087
2088 static bfd_boolean
2089 elf_s390_relocate_section (bfd *output_bfd,
2090 struct bfd_link_info *info,
2091 bfd *input_bfd,
2092 asection *input_section,
2093 bfd_byte *contents,
2094 Elf_Internal_Rela *relocs,
2095 Elf_Internal_Sym *local_syms,
2096 asection **local_sections)
2097 {
2098 struct elf_s390_link_hash_table *htab;
2099 Elf_Internal_Shdr *symtab_hdr;
2100 struct elf_link_hash_entry **sym_hashes;
2101 bfd_vma *local_got_offsets;
2102 Elf_Internal_Rela *rel;
2103 Elf_Internal_Rela *relend;
2104
2105 BFD_ASSERT (is_s390_elf (input_bfd));
2106
2107 htab = elf_s390_hash_table (info);
2108 if (htab == NULL)
2109 return FALSE;
2110
2111 symtab_hdr = &elf_symtab_hdr (input_bfd);
2112 sym_hashes = elf_sym_hashes (input_bfd);
2113 local_got_offsets = elf_local_got_offsets (input_bfd);
2114
2115 rel = relocs;
2116 relend = relocs + input_section->reloc_count;
2117 for (; rel < relend; rel++)
2118 {
2119 unsigned int r_type;
2120 reloc_howto_type *howto;
2121 unsigned long r_symndx;
2122 struct elf_link_hash_entry *h;
2123 Elf_Internal_Sym *sym;
2124 asection *sec;
2125 bfd_vma off;
2126 bfd_vma relocation;
2127 bfd_boolean unresolved_reloc;
2128 bfd_reloc_status_type r;
2129 int tls_type;
2130 asection *base_got = htab->elf.sgot;
2131 bfd_boolean resolved_to_zero;
2132
2133 r_type = ELF64_R_TYPE (rel->r_info);
2134 if (r_type == (int) R_390_GNU_VTINHERIT
2135 || r_type == (int) R_390_GNU_VTENTRY)
2136 continue;
2137 if (r_type >= (int) R_390_max)
2138 {
2139 bfd_set_error (bfd_error_bad_value);
2140 return FALSE;
2141 }
2142
2143 howto = elf_howto_table + r_type;
2144 r_symndx = ELF64_R_SYM (rel->r_info);
2145
2146 h = NULL;
2147 sym = NULL;
2148 sec = NULL;
2149 unresolved_reloc = FALSE;
2150 if (r_symndx < symtab_hdr->sh_info)
2151 {
2152 sym = local_syms + r_symndx;
2153 sec = local_sections[r_symndx];
2154
2155 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2156 {
2157 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2158 if (local_plt == NULL)
2159 return FALSE;
2160
2161 /* Address of the PLT slot. */
2162 relocation = (htab->elf.iplt->output_section->vma
2163 + htab->elf.iplt->output_offset
2164 + local_plt[r_symndx].plt.offset);
2165
2166 switch (r_type)
2167 {
2168 case R_390_PLTOFF16:
2169 case R_390_PLTOFF32:
2170 case R_390_PLTOFF64:
2171 relocation -= htab->elf.sgot->output_section->vma;
2172 break;
2173 case R_390_GOTPLT12:
2174 case R_390_GOTPLT16:
2175 case R_390_GOTPLT20:
2176 case R_390_GOTPLT32:
2177 case R_390_GOTPLT64:
2178 case R_390_GOTPLTENT:
2179 case R_390_GOT12:
2180 case R_390_GOT16:
2181 case R_390_GOT20:
2182 case R_390_GOT32:
2183 case R_390_GOT64:
2184 case R_390_GOTENT:
2185 {
2186 /* Write the PLT slot address into the GOT slot. */
2187 bfd_put_64 (output_bfd, relocation,
2188 htab->elf.sgot->contents +
2189 local_got_offsets[r_symndx]);
2190 relocation = (local_got_offsets[r_symndx] +
2191 htab->elf.sgot->output_offset);
2192
2193 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2194 relocation += htab->elf.sgot->output_section->vma;
2195 break;
2196 }
2197 default:
2198 break;
2199 }
2200 /* The output section is needed later in
2201 finish_dynamic_section when creating the dynamic
2202 relocation. */
2203 local_plt[r_symndx].sec = sec;
2204 goto do_relocation;
2205 }
2206 else
2207 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2208 }
2209 else
2210 {
2211 bfd_boolean warned ATTRIBUTE_UNUSED;
2212 bfd_boolean ignored ATTRIBUTE_UNUSED;
2213
2214 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2215 r_symndx, symtab_hdr, sym_hashes,
2216 h, sec, relocation,
2217 unresolved_reloc, warned, ignored);
2218 }
2219
2220 if (sec != NULL && discarded_section (sec))
2221 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2222 rel, 1, relend, howto, 0, contents);
2223
2224 if (bfd_link_relocatable (info))
2225 continue;
2226
2227 resolved_to_zero = (h != NULL
2228 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2229
2230 switch (r_type)
2231 {
2232 case R_390_GOTPLT12:
2233 case R_390_GOTPLT16:
2234 case R_390_GOTPLT20:
2235 case R_390_GOTPLT32:
2236 case R_390_GOTPLT64:
2237 case R_390_GOTPLTENT:
2238 /* There are three cases for a GOTPLT relocation. 1) The
2239 relocation is against the jump slot entry of a plt that
2240 will get emitted to the output file. 2) The relocation
2241 is against the jump slot of a plt entry that has been
2242 removed. elf_s390_adjust_gotplt has created a GOT entry
2243 as replacement. 3) The relocation is against a local symbol.
2244 Cases 2) and 3) are the same as the GOT relocation code
2245 so we just have to test for case 1 and fall through for
2246 the other two. */
2247 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2248 {
2249 bfd_vma plt_index;
2250
2251 if (s390_is_ifunc_symbol_p (h))
2252 {
2253 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2254 relocation = (plt_index * GOT_ENTRY_SIZE +
2255 htab->elf.igotplt->output_offset);
2256 if (r_type == R_390_GOTPLTENT)
2257 relocation += htab->elf.igotplt->output_section->vma;
2258 }
2259 else
2260 {
2261 /* Calc. index no.
2262 Current offset - size first entry / entry size. */
2263 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2264 PLT_ENTRY_SIZE;
2265
2266 /* Offset in GOT is PLT index plus GOT headers(3)
2267 times 8, addr & GOT addr. */
2268 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2269 if (r_type == R_390_GOTPLTENT)
2270 relocation += htab->elf.sgot->output_section->vma;
2271 }
2272 unresolved_reloc = FALSE;
2273 break;
2274 }
2275 /* Fall through. */
2276
2277 case R_390_GOT12:
2278 case R_390_GOT16:
2279 case R_390_GOT20:
2280 case R_390_GOT32:
2281 case R_390_GOT64:
2282 case R_390_GOTENT:
2283 /* Relocation is to the entry for this symbol in the global
2284 offset table. */
2285 if (base_got == NULL)
2286 abort ();
2287
2288 if (h != NULL)
2289 {
2290 bfd_boolean dyn;
2291
2292 off = h->got.offset;
2293 dyn = htab->elf.dynamic_sections_created;
2294
2295 if (s390_is_ifunc_symbol_p (h))
2296 {
2297 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2298 if (off == (bfd_vma)-1)
2299 {
2300 /* No explicit GOT usage so redirect to the
2301 got.iplt slot. */
2302 base_got = htab->elf.igotplt;
2303 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2304 }
2305 else
2306 {
2307 /* Explicit GOT slots must contain the address
2308 of the PLT slot. This will be handled in
2309 finish_dynamic_symbol. */
2310 }
2311 }
2312 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2313 bfd_link_pic (info),
2314 h)
2315 || (bfd_link_pic (info)
2316 && SYMBOL_REFERENCES_LOCAL (info, h))
2317 || (ELF_ST_VISIBILITY (h->other)
2318 && h->root.type == bfd_link_hash_undefweak))
2319 {
2320 /* This is actually a static link, or it is a
2321 -Bsymbolic link and the symbol is defined
2322 locally, or the symbol was forced to be local
2323 because of a version file. We must initialize
2324 this entry in the global offset table. Since the
2325 offset must always be a multiple of 2, we use the
2326 least significant bit to record whether we have
2327 initialized it already.
2328
2329 When doing a dynamic link, we create a .rel.got
2330 relocation entry to initialize the value. This
2331 is done in the finish_dynamic_symbol routine. */
2332 if ((off & 1) != 0)
2333 off &= ~1;
2334 else
2335 {
2336 bfd_put_64 (output_bfd, relocation,
2337 base_got->contents + off);
2338 h->got.offset |= 1;
2339 }
2340
2341 if ((h->def_regular
2342 && bfd_link_pic (info)
2343 && SYMBOL_REFERENCES_LOCAL (info, h))
2344 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2345 && ((r_type == R_390_GOTENT
2346 && (bfd_get_16 (input_bfd,
2347 contents + rel->r_offset - 2)
2348 & 0xff0f) == 0xc408)
2349 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2350 || (r_type == R_390_GOT20
2351 && (bfd_get_32 (input_bfd,
2352 contents + rel->r_offset - 2)
2353 & 0xff00f000) == 0xe300c000
2354 && bfd_get_8 (input_bfd,
2355 contents + rel->r_offset + 3) == 0x04)))
2356
2357 {
2358 unsigned short new_insn =
2359 (0xc000 | (bfd_get_8 (input_bfd,
2360 contents + rel->r_offset - 1) & 0xf0));
2361 bfd_put_16 (output_bfd, new_insn,
2362 contents + rel->r_offset - 2);
2363 r_type = R_390_PC32DBL;
2364 rel->r_addend = 2;
2365 howto = elf_howto_table + r_type;
2366 relocation = h->root.u.def.value
2367 + h->root.u.def.section->output_section->vma
2368 + h->root.u.def.section->output_offset;
2369 goto do_relocation;
2370 }
2371 }
2372 else
2373 unresolved_reloc = FALSE;
2374 }
2375 else
2376 {
2377 if (local_got_offsets == NULL)
2378 abort ();
2379
2380 off = local_got_offsets[r_symndx];
2381
2382 /* The offset must always be a multiple of 8. We use
2383 the least significant bit to record whether we have
2384 already generated the necessary reloc. */
2385 if ((off & 1) != 0)
2386 off &= ~1;
2387 else
2388 {
2389 bfd_put_64 (output_bfd, relocation,
2390 htab->elf.sgot->contents + off);
2391
2392 if (bfd_link_pic (info))
2393 {
2394 asection *s;
2395 Elf_Internal_Rela outrel;
2396 bfd_byte *loc;
2397
2398 s = htab->elf.srelgot;
2399 if (s == NULL)
2400 abort ();
2401
2402 outrel.r_offset = (htab->elf.sgot->output_section->vma
2403 + htab->elf.sgot->output_offset
2404 + off);
2405 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2406 outrel.r_addend = relocation;
2407 loc = s->contents;
2408 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2409 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2410 }
2411
2412 local_got_offsets[r_symndx] |= 1;
2413 }
2414 }
2415
2416 if (off >= (bfd_vma) -2)
2417 abort ();
2418
2419 relocation = base_got->output_offset + off;
2420
2421 /* For @GOTENT the relocation is against the offset between
2422 the instruction and the symbols entry in the GOT and not
2423 between the start of the GOT and the symbols entry. We
2424 add the vma of the GOT to get the correct value. */
2425 if ( r_type == R_390_GOTENT
2426 || r_type == R_390_GOTPLTENT)
2427 relocation += base_got->output_section->vma;
2428
2429 break;
2430
2431 case R_390_GOTOFF16:
2432 case R_390_GOTOFF32:
2433 case R_390_GOTOFF64:
2434 /* Relocation is relative to the start of the global offset
2435 table. */
2436
2437 if (h != NULL
2438 && s390_is_ifunc_symbol_p (h)
2439 && h->def_regular
2440 && !bfd_link_executable (info))
2441 {
2442 relocation = (htab->elf.iplt->output_section->vma
2443 + htab->elf.iplt->output_offset
2444 + h->plt.offset
2445 - htab->elf.sgot->output_section->vma);
2446 goto do_relocation;
2447 }
2448
2449 /* Note that sgot->output_offset is not involved in this
2450 calculation. We always want the start of .got. If we
2451 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2452 permitted by the ABI, we might have to change this
2453 calculation. */
2454 relocation -= htab->elf.sgot->output_section->vma;
2455 break;
2456
2457 case R_390_GOTPC:
2458 case R_390_GOTPCDBL:
2459 /* Use global offset table as symbol value. */
2460 relocation = htab->elf.sgot->output_section->vma;
2461 unresolved_reloc = FALSE;
2462 break;
2463
2464 case R_390_PLT12DBL:
2465 case R_390_PLT16DBL:
2466 case R_390_PLT24DBL:
2467 case R_390_PLT32:
2468 case R_390_PLT32DBL:
2469 case R_390_PLT64:
2470 /* Relocation is to the entry for this symbol in the
2471 procedure linkage table. */
2472
2473 /* Resolve a PLT32 reloc against a local symbol directly,
2474 without using the procedure linkage table. */
2475 if (h == NULL)
2476 break;
2477
2478 if (h->plt.offset == (bfd_vma) -1
2479 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2480 {
2481 /* We didn't make a PLT entry for this symbol. This
2482 happens when statically linking PIC code, or when
2483 using -Bsymbolic. */
2484 break;
2485 }
2486 if (s390_is_ifunc_symbol_p (h))
2487 relocation = (htab->elf.iplt->output_section->vma
2488 + htab->elf.iplt->output_offset
2489 + h->plt.offset);
2490 else
2491 relocation = (htab->elf.splt->output_section->vma
2492 + htab->elf.splt->output_offset
2493 + h->plt.offset);
2494 unresolved_reloc = FALSE;
2495 break;
2496
2497 case R_390_PLTOFF16:
2498 case R_390_PLTOFF32:
2499 case R_390_PLTOFF64:
2500 /* Relocation is to the entry for this symbol in the
2501 procedure linkage table relative to the start of the GOT. */
2502
2503 /* For local symbols or if we didn't make a PLT entry for
2504 this symbol resolve the symbol directly. */
2505 if (h == NULL
2506 || h->plt.offset == (bfd_vma) -1
2507 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2508 {
2509 relocation -= htab->elf.sgot->output_section->vma;
2510 break;
2511 }
2512
2513 if (s390_is_ifunc_symbol_p (h))
2514 relocation = (htab->elf.iplt->output_section->vma
2515 + htab->elf.iplt->output_offset
2516 + h->plt.offset
2517 - htab->elf.sgot->output_section->vma);
2518 else
2519 relocation = (htab->elf.splt->output_section->vma
2520 + htab->elf.splt->output_offset
2521 + h->plt.offset
2522 - htab->elf.sgot->output_section->vma);
2523 unresolved_reloc = FALSE;
2524 break;
2525
2526 case R_390_PC16:
2527 case R_390_PC12DBL:
2528 case R_390_PC16DBL:
2529 case R_390_PC24DBL:
2530 case R_390_PC32:
2531 case R_390_PC32DBL:
2532 case R_390_PC64:
2533 if (h != NULL
2534 && bfd_link_pie (info)
2535 && !h->def_regular)
2536 {
2537 _bfd_error_handler (_("%B: `%s' non-PLT reloc for symbol defined "
2538 "in shared library and accessed "
2539 "from executable "
2540 "(rebuild file with -fPIC ?)"),
2541 input_bfd, h->root.root.string);
2542 bfd_set_error (bfd_error_bad_value);
2543 return FALSE;
2544 }
2545 /* The target of these relocs are instruction operands
2546 residing in read-only sections. We cannot emit a runtime
2547 reloc for it. */
2548 if (h != NULL
2549 && s390_is_ifunc_symbol_p (h)
2550 && h->def_regular
2551 && bfd_link_pic (info))
2552 {
2553 relocation = (htab->elf.iplt->output_section->vma
2554 + htab->elf.iplt->output_offset
2555 + h->plt.offset);
2556 goto do_relocation;
2557 }
2558 /* Fall through. */
2559
2560 case R_390_8:
2561 case R_390_16:
2562 case R_390_32:
2563 case R_390_64:
2564
2565 if (h != NULL
2566 && s390_is_ifunc_symbol_p (h)
2567 && h->def_regular)
2568 {
2569 if (!bfd_link_pic (info))
2570 {
2571 /* For a non-shared object the symbol will not
2572 change. Hence we can write the address of the
2573 target IPLT slot now. */
2574 relocation = (htab->elf.iplt->output_section->vma
2575 + htab->elf.iplt->output_offset
2576 + h ->plt.offset);
2577 goto do_relocation;
2578 }
2579 else
2580 {
2581 /* For shared objects a runtime relocation is needed. */
2582
2583 Elf_Internal_Rela outrel;
2584 asection *sreloc;
2585
2586 /* Need a dynamic relocation to get the real function
2587 address. */
2588 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2589 info,
2590 input_section,
2591 rel->r_offset);
2592 if (outrel.r_offset == (bfd_vma) -1
2593 || outrel.r_offset == (bfd_vma) -2)
2594 abort ();
2595
2596 outrel.r_offset += (input_section->output_section->vma
2597 + input_section->output_offset);
2598
2599 if (h->dynindx == -1
2600 || h->forced_local
2601 || bfd_link_executable (info))
2602 {
2603 /* This symbol is resolved locally. */
2604 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2605 outrel.r_addend = (h->root.u.def.value
2606 + h->root.u.def.section->output_section->vma
2607 + h->root.u.def.section->output_offset);
2608 }
2609 else
2610 {
2611 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2612 outrel.r_addend = 0;
2613 }
2614
2615 sreloc = htab->elf.irelifunc;
2616 elf_append_rela (output_bfd, sreloc, &outrel);
2617
2618 /* If this reloc is against an external symbol, we
2619 do not want to fiddle with the addend. Otherwise,
2620 we need to include the symbol value so that it
2621 becomes an addend for the dynamic reloc. For an
2622 internal symbol, we have updated addend. */
2623 continue;
2624 }
2625 }
2626
2627 if ((input_section->flags & SEC_ALLOC) == 0)
2628 break;
2629
2630 if ((bfd_link_pic (info)
2631 && (h == NULL
2632 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2633 && !resolved_to_zero)
2634 || h->root.type != bfd_link_hash_undefweak)
2635 && ((r_type != R_390_PC16
2636 && r_type != R_390_PC12DBL
2637 && r_type != R_390_PC16DBL
2638 && r_type != R_390_PC24DBL
2639 && r_type != R_390_PC32
2640 && r_type != R_390_PC32DBL
2641 && r_type != R_390_PC64)
2642 || !SYMBOL_CALLS_LOCAL (info, h)))
2643 || (ELIMINATE_COPY_RELOCS
2644 && !bfd_link_pic (info)
2645 && h != NULL
2646 && h->dynindx != -1
2647 && !h->non_got_ref
2648 && ((h->def_dynamic
2649 && !h->def_regular)
2650 || h->root.type == bfd_link_hash_undefweak
2651 || h->root.type == bfd_link_hash_undefined)))
2652 {
2653 Elf_Internal_Rela outrel;
2654 bfd_boolean skip, relocate;
2655 asection *sreloc;
2656 bfd_byte *loc;
2657
2658 /* When generating a shared object, these relocations
2659 are copied into the output file to be resolved at run
2660 time. */
2661 skip = FALSE;
2662 relocate = FALSE;
2663
2664 outrel.r_offset =
2665 _bfd_elf_section_offset (output_bfd, info, input_section,
2666 rel->r_offset);
2667 if (outrel.r_offset == (bfd_vma) -1)
2668 skip = TRUE;
2669 else if (outrel.r_offset == (bfd_vma) -2)
2670 skip = TRUE, relocate = TRUE;
2671
2672 outrel.r_offset += (input_section->output_section->vma
2673 + input_section->output_offset);
2674
2675 if (skip)
2676 memset (&outrel, 0, sizeof outrel);
2677 else if (h != NULL
2678 && h->dynindx != -1
2679 && (r_type == R_390_PC16
2680 || r_type == R_390_PC12DBL
2681 || r_type == R_390_PC16DBL
2682 || r_type == R_390_PC24DBL
2683 || r_type == R_390_PC32
2684 || r_type == R_390_PC32DBL
2685 || r_type == R_390_PC64
2686 || !bfd_link_pic (info)
2687 || !SYMBOLIC_BIND (info, h)
2688 || !h->def_regular))
2689 {
2690 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2691 outrel.r_addend = rel->r_addend;
2692 }
2693 else
2694 {
2695 /* This symbol is local, or marked to become local. */
2696 outrel.r_addend = relocation + rel->r_addend;
2697 if (r_type == R_390_64)
2698 {
2699 relocate = TRUE;
2700 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2701 }
2702 else
2703 {
2704 long sindx;
2705
2706 if (bfd_is_abs_section (sec))
2707 sindx = 0;
2708 else if (sec == NULL || sec->owner == NULL)
2709 {
2710 bfd_set_error(bfd_error_bad_value);
2711 return FALSE;
2712 }
2713 else
2714 {
2715 asection *osec;
2716
2717 osec = sec->output_section;
2718 sindx = elf_section_data (osec)->dynindx;
2719
2720 if (sindx == 0)
2721 {
2722 osec = htab->elf.text_index_section;
2723 sindx = elf_section_data (osec)->dynindx;
2724 }
2725 BFD_ASSERT (sindx != 0);
2726
2727 /* We are turning this relocation into one
2728 against a section symbol, so subtract out
2729 the output section's address but not the
2730 offset of the input section in the output
2731 section. */
2732 outrel.r_addend -= osec->vma;
2733 }
2734 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2735 }
2736 }
2737
2738 sreloc = elf_section_data (input_section)->sreloc;
2739 if (sreloc == NULL)
2740 abort ();
2741
2742 loc = sreloc->contents;
2743 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2744 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2745
2746 /* If this reloc is against an external symbol, we do
2747 not want to fiddle with the addend. Otherwise, we
2748 need to include the symbol value so that it becomes
2749 an addend for the dynamic reloc. */
2750 if (! relocate)
2751 continue;
2752 }
2753
2754 break;
2755
2756 /* Relocations for tls literal pool entries. */
2757 case R_390_TLS_IE64:
2758 if (bfd_link_pic (info))
2759 {
2760 Elf_Internal_Rela outrel;
2761 asection *sreloc;
2762 bfd_byte *loc;
2763
2764 outrel.r_offset = rel->r_offset
2765 + input_section->output_section->vma
2766 + input_section->output_offset;
2767 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2768 sreloc = elf_section_data (input_section)->sreloc;
2769 if (sreloc == NULL)
2770 abort ();
2771 loc = sreloc->contents;
2772 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2773 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2774 }
2775 /* Fall through. */
2776
2777 case R_390_TLS_GD64:
2778 case R_390_TLS_GOTIE64:
2779 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2780 tls_type = GOT_UNKNOWN;
2781 if (h == NULL && local_got_offsets)
2782 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2783 else if (h != NULL)
2784 {
2785 tls_type = elf_s390_hash_entry(h)->tls_type;
2786 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2787 r_type = R_390_TLS_LE64;
2788 }
2789 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2790 r_type = R_390_TLS_IE64;
2791
2792 if (r_type == R_390_TLS_LE64)
2793 {
2794 /* This relocation gets optimized away by the local exec
2795 access optimization. */
2796 BFD_ASSERT (! unresolved_reloc);
2797 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2798 contents + rel->r_offset);
2799 continue;
2800 }
2801
2802 if (htab->elf.sgot == NULL)
2803 abort ();
2804
2805 if (h != NULL)
2806 off = h->got.offset;
2807 else
2808 {
2809 if (local_got_offsets == NULL)
2810 abort ();
2811
2812 off = local_got_offsets[r_symndx];
2813 }
2814
2815 emit_tls_relocs:
2816
2817 if ((off & 1) != 0)
2818 off &= ~1;
2819 else
2820 {
2821 Elf_Internal_Rela outrel;
2822 bfd_byte *loc;
2823 int dr_type, indx;
2824
2825 if (htab->elf.srelgot == NULL)
2826 abort ();
2827
2828 outrel.r_offset = (htab->elf.sgot->output_section->vma
2829 + htab->elf.sgot->output_offset + off);
2830
2831 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2832 if (r_type == R_390_TLS_GD64)
2833 dr_type = R_390_TLS_DTPMOD;
2834 else
2835 dr_type = R_390_TLS_TPOFF;
2836 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2837 outrel.r_addend = relocation - dtpoff_base (info);
2838 else
2839 outrel.r_addend = 0;
2840 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2841 loc = htab->elf.srelgot->contents;
2842 loc += htab->elf.srelgot->reloc_count++
2843 * sizeof (Elf64_External_Rela);
2844 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2845
2846 if (r_type == R_390_TLS_GD64)
2847 {
2848 if (indx == 0)
2849 {
2850 BFD_ASSERT (! unresolved_reloc);
2851 bfd_put_64 (output_bfd,
2852 relocation - dtpoff_base (info),
2853 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2854 }
2855 else
2856 {
2857 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2858 outrel.r_offset += GOT_ENTRY_SIZE;
2859 outrel.r_addend = 0;
2860 htab->elf.srelgot->reloc_count++;
2861 loc += sizeof (Elf64_External_Rela);
2862 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2863 }
2864 }
2865
2866 if (h != NULL)
2867 h->got.offset |= 1;
2868 else
2869 local_got_offsets[r_symndx] |= 1;
2870 }
2871
2872 if (off >= (bfd_vma) -2)
2873 abort ();
2874 if (r_type == ELF64_R_TYPE (rel->r_info))
2875 {
2876 relocation = htab->elf.sgot->output_offset + off;
2877 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2878 relocation += htab->elf.sgot->output_section->vma;
2879 unresolved_reloc = FALSE;
2880 }
2881 else
2882 {
2883 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2884 contents + rel->r_offset);
2885 continue;
2886 }
2887 break;
2888
2889 case R_390_TLS_GOTIE12:
2890 case R_390_TLS_GOTIE20:
2891 case R_390_TLS_IEENT:
2892 if (h == NULL)
2893 {
2894 if (local_got_offsets == NULL)
2895 abort();
2896 off = local_got_offsets[r_symndx];
2897 if (bfd_link_pic (info))
2898 goto emit_tls_relocs;
2899 }
2900 else
2901 {
2902 off = h->got.offset;
2903 tls_type = elf_s390_hash_entry(h)->tls_type;
2904 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2905 goto emit_tls_relocs;
2906 }
2907
2908 if (htab->elf.sgot == NULL)
2909 abort ();
2910
2911 BFD_ASSERT (! unresolved_reloc);
2912 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2913 htab->elf.sgot->contents + off);
2914 relocation = htab->elf.sgot->output_offset + off;
2915 if (r_type == R_390_TLS_IEENT)
2916 relocation += htab->elf.sgot->output_section->vma;
2917 unresolved_reloc = FALSE;
2918 break;
2919
2920 case R_390_TLS_LDM64:
2921 if (! bfd_link_pic (info))
2922 /* The literal pool entry this relocation refers to gets ignored
2923 by the optimized code of the local exec model. Do nothing
2924 and the value will turn out zero. */
2925 continue;
2926
2927 if (htab->elf.sgot == NULL)
2928 abort ();
2929
2930 off = htab->tls_ldm_got.offset;
2931 if (off & 1)
2932 off &= ~1;
2933 else
2934 {
2935 Elf_Internal_Rela outrel;
2936 bfd_byte *loc;
2937
2938 if (htab->elf.srelgot == NULL)
2939 abort ();
2940
2941 outrel.r_offset = (htab->elf.sgot->output_section->vma
2942 + htab->elf.sgot->output_offset + off);
2943
2944 bfd_put_64 (output_bfd, 0,
2945 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2946 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2947 outrel.r_addend = 0;
2948 loc = htab->elf.srelgot->contents;
2949 loc += htab->elf.srelgot->reloc_count++
2950 * sizeof (Elf64_External_Rela);
2951 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2952 htab->tls_ldm_got.offset |= 1;
2953 }
2954 relocation = htab->elf.sgot->output_offset + off;
2955 unresolved_reloc = FALSE;
2956 break;
2957
2958 case R_390_TLS_LE64:
2959 if (bfd_link_dll (info))
2960 {
2961 /* Linking a shared library with non-fpic code requires
2962 a R_390_TLS_TPOFF relocation. */
2963 Elf_Internal_Rela outrel;
2964 asection *sreloc;
2965 bfd_byte *loc;
2966 int indx;
2967
2968 outrel.r_offset = rel->r_offset
2969 + input_section->output_section->vma
2970 + input_section->output_offset;
2971 if (h != NULL && h->dynindx != -1)
2972 indx = h->dynindx;
2973 else
2974 indx = 0;
2975 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2976 if (indx == 0)
2977 outrel.r_addend = relocation - dtpoff_base (info);
2978 else
2979 outrel.r_addend = 0;
2980 sreloc = elf_section_data (input_section)->sreloc;
2981 if (sreloc == NULL)
2982 abort ();
2983 loc = sreloc->contents;
2984 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2985 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2986 }
2987 else
2988 {
2989 BFD_ASSERT (! unresolved_reloc);
2990 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2991 contents + rel->r_offset);
2992 }
2993 continue;
2994
2995 case R_390_TLS_LDO64:
2996 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
2997 relocation -= dtpoff_base (info);
2998 else
2999 /* When converting LDO to LE, we must negate. */
3000 relocation = -tpoff (info, relocation);
3001 break;
3002
3003 /* Relocations for tls instructions. */
3004 case R_390_TLS_LOAD:
3005 case R_390_TLS_GDCALL:
3006 case R_390_TLS_LDCALL:
3007 tls_type = GOT_UNKNOWN;
3008 if (h == NULL && local_got_offsets)
3009 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3010 else if (h != NULL)
3011 tls_type = elf_s390_hash_entry(h)->tls_type;
3012
3013 if (tls_type == GOT_TLS_GD)
3014 continue;
3015
3016 if (r_type == R_390_TLS_LOAD)
3017 {
3018 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3019 {
3020 /* IE->LE transition. Four valid cases:
3021 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3022 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3023 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3024 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3025 unsigned int insn0, insn1, ry;
3026
3027 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3028 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3029 if (insn1 != 0x0004)
3030 {
3031 invalid_tls_insn (input_bfd, input_section, rel);
3032 return FALSE;
3033 }
3034 if ((insn0 & 0xff00f000) == 0xe3000000)
3035 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3036 ry = (insn0 & 0x000f0000);
3037 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3038 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3039 ry = (insn0 & 0x0000f000) << 4;
3040 else if ((insn0 & 0xff00f000) == 0xe300c000)
3041 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3042 ry = (insn0 & 0x000f0000);
3043 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3044 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3045 ry = (insn0 & 0x0000f000) << 4;
3046 else
3047 {
3048 invalid_tls_insn (input_bfd, input_section, rel);
3049 return FALSE;
3050 }
3051 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3052 insn1 = 0x000d;
3053 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3054 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3055 }
3056 }
3057 else if (r_type == R_390_TLS_GDCALL)
3058 {
3059 unsigned int insn0, insn1;
3060
3061 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3062 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3063 if ((insn0 & 0xffff0000) != 0xc0e50000)
3064 {
3065 invalid_tls_insn (input_bfd, input_section, rel);
3066 return FALSE;
3067 }
3068 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3069 {
3070 /* GD->LE transition.
3071 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3072 insn0 = 0xc0040000;
3073 insn1 = 0x0000;
3074 }
3075 else
3076 {
3077 /* GD->IE transition.
3078 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3079 insn0 = 0xe322c000;
3080 insn1 = 0x0004;
3081 }
3082 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3083 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3084 }
3085 else if (r_type == R_390_TLS_LDCALL)
3086 {
3087 if (!bfd_link_pic (info))
3088 {
3089 unsigned int insn0, insn1;
3090
3091 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3092 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3093 if ((insn0 & 0xffff0000) != 0xc0e50000)
3094 {
3095 invalid_tls_insn (input_bfd, input_section, rel);
3096 return FALSE;
3097 }
3098 /* LD->LE transition.
3099 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3100 insn0 = 0xc0040000;
3101 insn1 = 0x0000;
3102 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3103 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3104 }
3105 }
3106 continue;
3107
3108 default:
3109 break;
3110 }
3111
3112 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3113 because such sections are not SEC_ALLOC and thus ld.so will
3114 not process them. */
3115 if (unresolved_reloc
3116 && !((input_section->flags & SEC_DEBUGGING) != 0
3117 && h->def_dynamic)
3118 && _bfd_elf_section_offset (output_bfd, info, input_section,
3119 rel->r_offset) != (bfd_vma) -1)
3120 _bfd_error_handler
3121 /* xgettext:c-format */
3122 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3123 input_bfd,
3124 input_section,
3125 rel->r_offset,
3126 howto->name,
3127 h->root.root.string);
3128
3129 do_relocation:
3130
3131 /* When applying a 24 bit reloc we need to start one byte
3132 earlier. Otherwise the 32 bit get/put bfd operations might
3133 access a byte after the actual section. */
3134 if (r_type == R_390_PC24DBL
3135 || r_type == R_390_PLT24DBL)
3136 rel->r_offset--;
3137
3138 if (r_type == R_390_20
3139 || r_type == R_390_GOT20
3140 || r_type == R_390_GOTPLT20
3141 || r_type == R_390_TLS_GOTIE20)
3142 {
3143 relocation += rel->r_addend;
3144 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3145 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3146 contents, rel->r_offset,
3147 relocation, 0);
3148 }
3149 else
3150 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3151 contents, rel->r_offset,
3152 relocation, rel->r_addend);
3153
3154 if (r != bfd_reloc_ok)
3155 {
3156 const char *name;
3157
3158 if (h != NULL)
3159 name = h->root.root.string;
3160 else
3161 {
3162 name = bfd_elf_string_from_elf_section (input_bfd,
3163 symtab_hdr->sh_link,
3164 sym->st_name);
3165 if (name == NULL)
3166 return FALSE;
3167 if (*name == '\0')
3168 name = bfd_section_name (input_bfd, sec);
3169 }
3170
3171 if (r == bfd_reloc_overflow)
3172 (*info->callbacks->reloc_overflow)
3173 (info, (h ? &h->root : NULL), name, howto->name,
3174 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3175 else
3176 {
3177 _bfd_error_handler
3178 /* xgettext:c-format */
3179 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3180 input_bfd, input_section,
3181 rel->r_offset, name, (int) r);
3182 return FALSE;
3183 }
3184 }
3185 }
3186
3187 return TRUE;
3188 }
3189
3190 /* Generate the PLT slots together with the dynamic relocations needed
3191 for IFUNC symbols. */
3192
3193 static void
3194 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3195 struct bfd_link_info *info,
3196 struct elf_link_hash_entry *h,
3197 struct elf_s390_link_hash_table *htab,
3198 bfd_vma plt_offset,
3199 bfd_vma resolver_address)
3200 {
3201 bfd_vma plt_index;
3202 bfd_vma got_offset;
3203 Elf_Internal_Rela rela;
3204 bfd_byte *loc;
3205 asection *plt, *gotplt, *relplt;
3206
3207 if (htab->elf.iplt == NULL
3208 || htab->elf.igotplt == NULL
3209 || htab->elf.irelplt == NULL)
3210 abort ();
3211
3212 /* Index of the PLT slot within iplt section. */
3213 plt_index = plt_offset / PLT_ENTRY_SIZE;
3214 plt = htab->elf.iplt;
3215 /* Offset into the igot.plt section. */
3216 got_offset = plt_index * GOT_ENTRY_SIZE;
3217 gotplt = htab->elf.igotplt;
3218 relplt = htab->elf.irelplt;
3219
3220 /* Fill in the blueprint of a PLT. */
3221 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3222 PLT_ENTRY_SIZE);
3223
3224 /* Fixup the relative address to the GOT entry */
3225 bfd_put_32 (output_bfd,
3226 (gotplt->output_section->vma +
3227 gotplt->output_offset + got_offset
3228 - (plt->output_section->vma +
3229 plt->output_offset +
3230 plt_offset))/2,
3231 plt->contents + plt_offset + 2);
3232 /* Fixup the relative branch to PLT 0 */
3233 bfd_put_32 (output_bfd, - (plt->output_offset +
3234 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3235 plt->contents + plt_offset + 24);
3236 /* Fixup offset into .rela.plt section. */
3237 bfd_put_32 (output_bfd, relplt->output_offset +
3238 plt_index * sizeof (Elf64_External_Rela),
3239 plt->contents + plt_offset + 28);
3240
3241 /* Fill in the entry in the global offset table.
3242 Points to instruction after GOT offset. */
3243 bfd_put_64 (output_bfd,
3244 (plt->output_section->vma
3245 + plt->output_offset
3246 + plt_offset
3247 + 14),
3248 gotplt->contents + got_offset);
3249
3250 /* Fill in the entry in the .rela.plt section. */
3251 rela.r_offset = (gotplt->output_section->vma
3252 + gotplt->output_offset
3253 + got_offset);
3254
3255 if (!h
3256 || h->dynindx == -1
3257 || ((bfd_link_executable (info)
3258 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3259 && h->def_regular))
3260 {
3261 /* The symbol can be locally resolved. */
3262 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3263 rela.r_addend = resolver_address;
3264 }
3265 else
3266 {
3267 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3268 rela.r_addend = 0;
3269 }
3270
3271 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3272 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3273 }
3274
3275
3276 /* Finish up dynamic symbol handling. We set the contents of various
3277 dynamic sections here. */
3278
3279 static bfd_boolean
3280 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3281 struct bfd_link_info *info,
3282 struct elf_link_hash_entry *h,
3283 Elf_Internal_Sym *sym)
3284 {
3285 struct elf_s390_link_hash_table *htab;
3286 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3287
3288 htab = elf_s390_hash_table (info);
3289 if (htab == NULL)
3290 return FALSE;
3291
3292 if (h->plt.offset != (bfd_vma) -1)
3293 {
3294 bfd_vma plt_index;
3295 bfd_vma got_offset;
3296 Elf_Internal_Rela rela;
3297 bfd_byte *loc;
3298
3299 /* This symbol has an entry in the procedure linkage table. Set
3300 it up. */
3301 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3302 {
3303 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3304 htab, h->plt.offset,
3305 eh->ifunc_resolver_address +
3306 eh->ifunc_resolver_section->output_offset +
3307 eh->ifunc_resolver_section->output_section->vma);
3308
3309 /* Do not return yet. Handling of explicit GOT slots of
3310 IFUNC symbols is below. */
3311 }
3312 else
3313 {
3314 if (h->dynindx == -1
3315 || htab->elf.splt == NULL
3316 || htab->elf.sgotplt == NULL
3317 || htab->elf.srelplt == NULL)
3318 abort ();
3319
3320 /* Calc. index no.
3321 Current offset - size first entry / entry size. */
3322 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3323
3324 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3325 addr & GOT addr. */
3326 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3327
3328 /* Fill in the blueprint of a PLT. */
3329 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3330 PLT_ENTRY_SIZE);
3331
3332 /* Fixup the relative address to the GOT entry */
3333 bfd_put_32 (output_bfd,
3334 (htab->elf.sgotplt->output_section->vma +
3335 htab->elf.sgotplt->output_offset + got_offset
3336 - (htab->elf.splt->output_section->vma +
3337 htab->elf.splt->output_offset +
3338 h->plt.offset))/2,
3339 htab->elf.splt->contents + h->plt.offset + 2);
3340 /* Fixup the relative branch to PLT 0 */
3341 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3342 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3343 htab->elf.splt->contents + h->plt.offset + 24);
3344 /* Fixup offset into .rela.plt section. */
3345 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3346 htab->elf.splt->contents + h->plt.offset + 28);
3347
3348 /* Fill in the entry in the global offset table.
3349 Points to instruction after GOT offset. */
3350 bfd_put_64 (output_bfd,
3351 (htab->elf.splt->output_section->vma
3352 + htab->elf.splt->output_offset
3353 + h->plt.offset
3354 + 14),
3355 htab->elf.sgotplt->contents + got_offset);
3356
3357 /* Fill in the entry in the .rela.plt section. */
3358 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3359 + htab->elf.sgotplt->output_offset
3360 + got_offset);
3361 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3362 rela.r_addend = 0;
3363 loc = htab->elf.srelplt->contents + plt_index *
3364 sizeof (Elf64_External_Rela);
3365 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3366
3367 if (!h->def_regular)
3368 {
3369 /* Mark the symbol as undefined, rather than as defined in
3370 the .plt section. Leave the value alone. This is a clue
3371 for the dynamic linker, to make function pointer
3372 comparisons work between an application and shared
3373 library. */
3374 sym->st_shndx = SHN_UNDEF;
3375 }
3376 }
3377 }
3378
3379 if (h->got.offset != (bfd_vma) -1
3380 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3381 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3382 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3383 {
3384 Elf_Internal_Rela rela;
3385 bfd_byte *loc;
3386
3387 /* This symbol has an entry in the global offset table. Set it
3388 up. */
3389 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3390 abort ();
3391
3392 rela.r_offset = (htab->elf.sgot->output_section->vma
3393 + htab->elf.sgot->output_offset
3394 + (h->got.offset &~ (bfd_vma) 1));
3395
3396 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3397 {
3398 if (bfd_link_pic (info))
3399 {
3400 /* An explicit GOT slot usage needs GLOB_DAT. If the
3401 symbol references local the implicit got.iplt slot
3402 will be used and the IRELATIVE reloc has been created
3403 above. */
3404 goto do_glob_dat;
3405 }
3406 else
3407 {
3408 /* For non-shared objects explicit GOT slots must be
3409 filled with the PLT slot address for pointer
3410 equality reasons. */
3411 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3412 + htab->elf.iplt->output_offset
3413 + h->plt.offset),
3414 htab->elf.sgot->contents + h->got.offset);
3415 return TRUE;
3416 }
3417 }
3418 else if (bfd_link_pic (info)
3419 && SYMBOL_REFERENCES_LOCAL (info, h))
3420 {
3421 /* If this is a static link, or it is a -Bsymbolic link and
3422 the symbol is defined locally or was forced to be local
3423 because of a version file, we just want to emit a
3424 RELATIVE reloc. The entry in the global offset table
3425 will already have been initialized in the
3426 relocate_section function. */
3427 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3428 return FALSE;
3429 BFD_ASSERT((h->got.offset & 1) != 0);
3430 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3431 rela.r_addend = (h->root.u.def.value
3432 + h->root.u.def.section->output_section->vma
3433 + h->root.u.def.section->output_offset);
3434 }
3435 else
3436 {
3437 BFD_ASSERT((h->got.offset & 1) == 0);
3438 do_glob_dat:
3439 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3440 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3441 rela.r_addend = 0;
3442 }
3443
3444 loc = htab->elf.srelgot->contents;
3445 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3446 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3447 }
3448
3449 if (h->needs_copy)
3450 {
3451 Elf_Internal_Rela rela;
3452 asection *s;
3453 bfd_byte *loc;
3454
3455 /* This symbols needs a copy reloc. Set it up. */
3456
3457 if (h->dynindx == -1
3458 || (h->root.type != bfd_link_hash_defined
3459 && h->root.type != bfd_link_hash_defweak)
3460 || htab->elf.srelbss == NULL)
3461 abort ();
3462
3463 rela.r_offset = (h->root.u.def.value
3464 + h->root.u.def.section->output_section->vma
3465 + h->root.u.def.section->output_offset);
3466 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3467 rela.r_addend = 0;
3468 if (h->root.u.def.section == htab->elf.sdynrelro)
3469 s = htab->elf.sreldynrelro;
3470 else
3471 s = htab->elf.srelbss;
3472 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3473 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3474 }
3475
3476 /* Mark some specially defined symbols as absolute. */
3477 if (h == htab->elf.hdynamic
3478 || h == htab->elf.hgot
3479 || h == htab->elf.hplt)
3480 sym->st_shndx = SHN_ABS;
3481
3482 return TRUE;
3483 }
3484
3485 /* Used to decide how to sort relocs in an optimal manner for the
3486 dynamic linker, before writing them out. */
3487
3488 static enum elf_reloc_type_class
3489 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3490 const asection *rel_sec ATTRIBUTE_UNUSED,
3491 const Elf_Internal_Rela *rela)
3492 {
3493 bfd *abfd = info->output_bfd;
3494 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3495 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3496 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3497 Elf_Internal_Sym sym;
3498
3499 if (htab->elf.dynsym == NULL
3500 || !bed->s->swap_symbol_in (abfd,
3501 (htab->elf.dynsym->contents
3502 + r_symndx * bed->s->sizeof_sym),
3503 0, &sym))
3504 abort ();
3505
3506 /* Check relocation against STT_GNU_IFUNC symbol. */
3507 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3508 return reloc_class_ifunc;
3509
3510 switch ((int) ELF64_R_TYPE (rela->r_info))
3511 {
3512 case R_390_RELATIVE:
3513 return reloc_class_relative;
3514 case R_390_JMP_SLOT:
3515 return reloc_class_plt;
3516 case R_390_COPY:
3517 return reloc_class_copy;
3518 default:
3519 return reloc_class_normal;
3520 }
3521 }
3522
3523 /* Finish up the dynamic sections. */
3524
3525 static bfd_boolean
3526 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3527 struct bfd_link_info *info)
3528 {
3529 struct elf_s390_link_hash_table *htab;
3530 bfd *dynobj;
3531 asection *sdyn;
3532 bfd *ibfd;
3533 unsigned int i;
3534
3535 htab = elf_s390_hash_table (info);
3536 if (htab == NULL)
3537 return FALSE;
3538
3539 dynobj = htab->elf.dynobj;
3540 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3541
3542 if (htab->elf.dynamic_sections_created)
3543 {
3544 Elf64_External_Dyn *dyncon, *dynconend;
3545
3546 if (sdyn == NULL || htab->elf.sgot == NULL)
3547 abort ();
3548
3549 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3550 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3551 for (; dyncon < dynconend; dyncon++)
3552 {
3553 Elf_Internal_Dyn dyn;
3554 asection *s;
3555
3556 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3557
3558 switch (dyn.d_tag)
3559 {
3560 default:
3561 continue;
3562
3563 case DT_PLTGOT:
3564 s = htab->elf.sgotplt;
3565 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3566 break;
3567
3568 case DT_JMPREL:
3569 s = htab->elf.srelplt;
3570 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3571 break;
3572
3573 case DT_PLTRELSZ:
3574 dyn.d_un.d_val = htab->elf.srelplt->size;
3575 if (htab->elf.irelplt)
3576 dyn.d_un.d_val += htab->elf.irelplt->size;
3577 break;
3578
3579 case DT_RELASZ:
3580 /* The procedure linkage table relocs (DT_JMPREL) should
3581 not be included in the overall relocs (DT_RELA).
3582 Therefore, we override the DT_RELASZ entry here to
3583 make it not include the JMPREL relocs. Since the
3584 linker script arranges for .rela.plt to follow all
3585 other relocation sections, we don't have to worry
3586 about changing the DT_RELA entry. */
3587 dyn.d_un.d_val -= htab->elf.srelplt->size;
3588 if (htab->elf.irelplt)
3589 dyn.d_un.d_val -= htab->elf.irelplt->size;
3590 break;
3591 }
3592
3593 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3594 }
3595
3596 /* Fill in the special first entry in the procedure linkage table. */
3597 if (htab->elf.splt && htab->elf.splt->size > 0)
3598 {
3599 /* fill in blueprint for plt 0 entry */
3600 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3601 PLT_FIRST_ENTRY_SIZE);
3602 /* Fixup relative address to start of GOT */
3603 bfd_put_32 (output_bfd,
3604 (htab->elf.sgotplt->output_section->vma
3605 + htab->elf.sgotplt->output_offset
3606 - htab->elf.splt->output_section->vma
3607 - htab->elf.splt->output_offset - 6)/2,
3608 htab->elf.splt->contents + 8);
3609 }
3610 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3611 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3612 = PLT_ENTRY_SIZE;
3613 }
3614
3615 if (htab->elf.sgotplt)
3616 {
3617 /* Fill in the first three entries in the global offset table. */
3618 if (htab->elf.sgotplt->size > 0)
3619 {
3620 bfd_put_64 (output_bfd,
3621 (sdyn == NULL ? (bfd_vma) 0
3622 : sdyn->output_section->vma + sdyn->output_offset),
3623 htab->elf.sgotplt->contents);
3624 /* One entry for shared object struct ptr. */
3625 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3626 /* One entry for _dl_runtime_resolve. */
3627 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
3628 }
3629
3630 elf_section_data (htab->elf.sgot->output_section)
3631 ->this_hdr.sh_entsize = 8;
3632 }
3633
3634 /* Finish dynamic symbol for local IFUNC symbols. */
3635 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3636 {
3637 struct plt_entry *local_plt;
3638 Elf_Internal_Sym *isym;
3639 Elf_Internal_Shdr *symtab_hdr;
3640
3641 symtab_hdr = &elf_symtab_hdr (ibfd);
3642
3643 if (!is_s390_elf (ibfd))
3644 continue;
3645
3646 local_plt = elf_s390_local_plt (ibfd);
3647 if (local_plt != NULL)
3648 for (i = 0; i < symtab_hdr->sh_info; i++)
3649 {
3650 if (local_plt[i].plt.offset != (bfd_vma) -1)
3651 {
3652 asection *sec = local_plt[i].sec;
3653 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3654 if (isym == NULL)
3655 return FALSE;
3656
3657 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3658 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3659 local_plt[i].plt.offset,
3660 isym->st_value
3661 + sec->output_section->vma
3662 + sec->output_offset);
3663
3664 }
3665 }
3666 }
3667
3668 return TRUE;
3669 }
3670 \f
3671 /* Support for core dump NOTE sections. */
3672
3673 static bfd_boolean
3674 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3675 {
3676 int offset;
3677 size_t size;
3678
3679 switch (note->descsz)
3680 {
3681 default:
3682 return FALSE;
3683
3684 case 336: /* sizeof(struct elf_prstatus) on s390x */
3685 /* pr_cursig */
3686 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3687
3688 /* pr_pid */
3689 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3690
3691 /* pr_reg */
3692 offset = 112;
3693 size = 216;
3694 break;
3695 }
3696
3697 /* Make a ".reg/999" section. */
3698 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3699 size, note->descpos + offset);
3700 }
3701
3702 static bfd_boolean
3703 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3704 {
3705 switch (note->descsz)
3706 {
3707 default:
3708 return FALSE;
3709
3710 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3711 elf_tdata (abfd)->core->pid
3712 = bfd_get_32 (abfd, note->descdata + 24);
3713 elf_tdata (abfd)->core->program
3714 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3715 elf_tdata (abfd)->core->command
3716 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3717 }
3718
3719 /* Note that for some reason, a spurious space is tacked
3720 onto the end of the args in some (at least one anyway)
3721 implementations, so strip it off if it exists. */
3722
3723 {
3724 char *command = elf_tdata (abfd)->core->command;
3725 int n = strlen (command);
3726
3727 if (0 < n && command[n - 1] == ' ')
3728 command[n - 1] = '\0';
3729 }
3730
3731 return TRUE;
3732 }
3733
3734 static char *
3735 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3736 int note_type, ...)
3737 {
3738 va_list ap;
3739
3740 switch (note_type)
3741 {
3742 default:
3743 return NULL;
3744
3745 case NT_PRPSINFO:
3746 {
3747 char data[136] = { 0 };
3748 const char *fname, *psargs;
3749
3750 va_start (ap, note_type);
3751 fname = va_arg (ap, const char *);
3752 psargs = va_arg (ap, const char *);
3753 va_end (ap);
3754
3755 strncpy (data + 40, fname, 16);
3756 strncpy (data + 56, psargs, 80);
3757 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3758 &data, sizeof (data));
3759 }
3760
3761 case NT_PRSTATUS:
3762 {
3763 char data[336] = { 0 };
3764 long pid;
3765 int cursig;
3766 const void *gregs;
3767
3768 va_start (ap, note_type);
3769 pid = va_arg (ap, long);
3770 cursig = va_arg (ap, int);
3771 gregs = va_arg (ap, const void *);
3772 va_end (ap);
3773
3774 bfd_put_16 (abfd, cursig, data + 12);
3775 bfd_put_32 (abfd, pid, data + 32);
3776 memcpy (data + 112, gregs, 216);
3777 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3778 &data, sizeof (data));
3779 }
3780 }
3781 /* NOTREACHED */
3782 }
3783 \f
3784 /* Return address for Ith PLT stub in section PLT, for relocation REL
3785 or (bfd_vma) -1 if it should not be included. */
3786
3787 static bfd_vma
3788 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3789 const arelent *rel ATTRIBUTE_UNUSED)
3790 {
3791 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3792 }
3793
3794 /* Merge backend specific data from an object file to the output
3795 object file when linking. */
3796
3797 static bfd_boolean
3798 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3799 {
3800 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3801 return TRUE;
3802
3803 return elf_s390_merge_obj_attributes (ibfd, info);
3804 }
3805
3806 /* We may add a PT_S390_PGSTE program header. */
3807
3808 static int
3809 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3810 struct bfd_link_info *info)
3811 {
3812 struct elf_s390_link_hash_table *htab;
3813
3814 if (info)
3815 {
3816 htab = elf_s390_hash_table (info);
3817 if (htab)
3818 return htab->params->pgste;
3819 }
3820 return 0;
3821 }
3822
3823
3824 /* Add the PT_S390_PGSTE program header. */
3825
3826 static bfd_boolean
3827 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3828 {
3829 struct elf_s390_link_hash_table *htab;
3830 struct elf_segment_map *m, *pm = NULL;
3831
3832 if (!abfd || !info)
3833 return TRUE;
3834
3835 htab = elf_s390_hash_table (info);
3836 if (!htab || !htab->params->pgste)
3837 return TRUE;
3838
3839 /* If there is already a PT_S390_PGSTE header, avoid adding
3840 another. */
3841 m = elf_seg_map (abfd);
3842 while (m && m->p_type != PT_S390_PGSTE)
3843 {
3844 pm = m;
3845 m = m->next;
3846 }
3847
3848 if (m)
3849 return TRUE;
3850
3851 m = (struct elf_segment_map *)
3852 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3853 if (m == NULL)
3854 return FALSE;
3855 m->p_type = PT_S390_PGSTE;
3856 m->count = 0;
3857 m->next = NULL;
3858 if (pm)
3859 pm->next = m;
3860
3861 return TRUE;
3862 }
3863
3864 bfd_boolean
3865 bfd_elf_s390_set_options (struct bfd_link_info *info,
3866 struct s390_elf_params *params)
3867 {
3868 struct elf_s390_link_hash_table *htab;
3869
3870 if (info)
3871 {
3872 htab = elf_s390_hash_table (info);
3873 if (htab)
3874 htab->params = params;
3875 }
3876
3877 return TRUE;
3878 }
3879
3880
3881 /* Why was the hash table entry size definition changed from
3882 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3883 this is the only reason for the s390_elf64_size_info structure. */
3884
3885 const struct elf_size_info s390_elf64_size_info =
3886 {
3887 sizeof (Elf64_External_Ehdr),
3888 sizeof (Elf64_External_Phdr),
3889 sizeof (Elf64_External_Shdr),
3890 sizeof (Elf64_External_Rel),
3891 sizeof (Elf64_External_Rela),
3892 sizeof (Elf64_External_Sym),
3893 sizeof (Elf64_External_Dyn),
3894 sizeof (Elf_External_Note),
3895 8, /* hash-table entry size. */
3896 1, /* internal relocations per external relocations. */
3897 64, /* arch_size. */
3898 3, /* log_file_align. */
3899 ELFCLASS64, EV_CURRENT,
3900 bfd_elf64_write_out_phdrs,
3901 bfd_elf64_write_shdrs_and_ehdr,
3902 bfd_elf64_checksum_contents,
3903 bfd_elf64_write_relocs,
3904 bfd_elf64_swap_symbol_in,
3905 bfd_elf64_swap_symbol_out,
3906 bfd_elf64_slurp_reloc_table,
3907 bfd_elf64_slurp_symbol_table,
3908 bfd_elf64_swap_dyn_in,
3909 bfd_elf64_swap_dyn_out,
3910 bfd_elf64_swap_reloc_in,
3911 bfd_elf64_swap_reloc_out,
3912 bfd_elf64_swap_reloca_in,
3913 bfd_elf64_swap_reloca_out
3914 };
3915
3916 #define TARGET_BIG_SYM s390_elf64_vec
3917 #define TARGET_BIG_NAME "elf64-s390"
3918 #define ELF_ARCH bfd_arch_s390
3919 #define ELF_TARGET_ID S390_ELF_DATA
3920 #define ELF_MACHINE_CODE EM_S390
3921 #define ELF_MACHINE_ALT1 EM_S390_OLD
3922 #define ELF_MAXPAGESIZE 0x1000
3923
3924 #define elf_backend_size_info s390_elf64_size_info
3925
3926 #define elf_backend_can_gc_sections 1
3927 #define elf_backend_can_refcount 1
3928 #define elf_backend_want_got_plt 1
3929 #define elf_backend_plt_readonly 1
3930 #define elf_backend_want_plt_sym 0
3931 #define elf_backend_got_header_size 24
3932 #define elf_backend_want_dynrelro 1
3933 #define elf_backend_rela_normal 1
3934
3935 #define elf_info_to_howto elf_s390_info_to_howto
3936
3937 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3938 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3939 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3940 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3941 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3942
3943 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3944 #define elf_backend_check_relocs elf_s390_check_relocs
3945 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3946 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3947 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3948 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3949 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3950 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3951 #define elf_backend_relocate_section elf_s390_relocate_section
3952 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3953 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3954 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3955 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
3956 #define elf_backend_write_core_note elf_s390_write_core_note
3957 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3958 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3959 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3960 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
3961 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
3962
3963 #define bfd_elf64_mkobject elf_s390_mkobject
3964 #define elf_backend_object_p elf_s390_object_p
3965
3966 #include "elf64-target.h"
A mirror of the official binutils-gdb repository