]> 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
unrecognized/unsupported reloc message
[thirdparty/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2018 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 (_("%pB: unsupported relocation type %#x"),
374 abfd, 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 (_("%pB: 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
917 /* Create got section and local_got_refcounts array if they
918 are needed. */
919 r_type = elf_s390_tls_transition (info,
920 ELF64_R_TYPE (rel->r_info),
921 h == NULL);
922 switch (r_type)
923 {
924 case R_390_GOT12:
925 case R_390_GOT16:
926 case R_390_GOT20:
927 case R_390_GOT32:
928 case R_390_GOT64:
929 case R_390_GOTENT:
930 case R_390_GOTPLT12:
931 case R_390_GOTPLT16:
932 case R_390_GOTPLT20:
933 case R_390_GOTPLT32:
934 case R_390_GOTPLT64:
935 case R_390_GOTPLTENT:
936 case R_390_TLS_GD64:
937 case R_390_TLS_GOTIE12:
938 case R_390_TLS_GOTIE20:
939 case R_390_TLS_GOTIE64:
940 case R_390_TLS_IEENT:
941 case R_390_TLS_IE64:
942 case R_390_TLS_LDM64:
943 if (h == NULL
944 && local_got_refcounts == NULL)
945 {
946 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
947 return FALSE;
948 local_got_refcounts = elf_local_got_refcounts (abfd);
949 }
950
951 /* Fall through. */
952 case R_390_GOTOFF16:
953 case R_390_GOTOFF32:
954 case R_390_GOTOFF64:
955 case R_390_GOTPC:
956 case R_390_GOTPCDBL:
957 if (htab->elf.sgot == NULL)
958 {
959 if (htab->elf.dynobj == NULL)
960 htab->elf.dynobj = abfd;
961 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
962 return FALSE;
963 }
964 }
965
966 if (h != NULL)
967 {
968 if (htab->elf.dynobj == NULL)
969 htab->elf.dynobj = abfd;
970 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
971 return FALSE;
972
973 /* Make sure an IFUNC symbol defined in a non-shared object
974 always gets a PLT slot. */
975 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
976 {
977 /* The symbol is called by the dynamic loader in order
978 to resolve the relocation. So it is in fact also
979 referenced. */
980 h->ref_regular = 1;
981 h->needs_plt = 1;
982 }
983 }
984
985 switch (r_type)
986 {
987 case R_390_GOTPC:
988 case R_390_GOTPCDBL:
989 /* These relocs do not need a GOT slot. They just load the
990 GOT pointer itself or address something else relative to
991 the GOT. Since the GOT pointer has been set up above we
992 are done. */
993 break;
994 case R_390_GOTOFF16:
995 case R_390_GOTOFF32:
996 case R_390_GOTOFF64:
997 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
998 break;
999 /* Fall through. */
1000
1001 case R_390_PLT12DBL:
1002 case R_390_PLT16DBL:
1003 case R_390_PLT24DBL:
1004 case R_390_PLT32:
1005 case R_390_PLT32DBL:
1006 case R_390_PLT64:
1007 case R_390_PLTOFF16:
1008 case R_390_PLTOFF32:
1009 case R_390_PLTOFF64:
1010 /* This symbol requires a procedure linkage table entry. We
1011 actually build the entry in adjust_dynamic_symbol,
1012 because this might be a case of linking PIC code which is
1013 never referenced by a dynamic object, in which case we
1014 don't need to generate a procedure linkage table entry
1015 after all. */
1016
1017 /* If this is a local symbol, we resolve it directly without
1018 creating a procedure linkage table entry. */
1019 if (h != NULL)
1020 {
1021 h->needs_plt = 1;
1022 h->plt.refcount += 1;
1023 }
1024 break;
1025
1026 case R_390_GOTPLT12:
1027 case R_390_GOTPLT16:
1028 case R_390_GOTPLT20:
1029 case R_390_GOTPLT32:
1030 case R_390_GOTPLT64:
1031 case R_390_GOTPLTENT:
1032 /* This symbol requires either a procedure linkage table entry
1033 or an entry in the local got. We actually build the entry
1034 in adjust_dynamic_symbol because whether this is really a
1035 global reference can change and with it the fact if we have
1036 to create a plt entry or a local got entry. To be able to
1037 make a once global symbol a local one we have to keep track
1038 of the number of gotplt references that exist for this
1039 symbol. */
1040 if (h != NULL)
1041 {
1042 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1043 h->needs_plt = 1;
1044 h->plt.refcount += 1;
1045 }
1046 else
1047 local_got_refcounts[r_symndx] += 1;
1048 break;
1049
1050 case R_390_TLS_LDM64:
1051 htab->tls_ldm_got.refcount += 1;
1052 break;
1053
1054 case R_390_TLS_IE64:
1055 case R_390_TLS_GOTIE12:
1056 case R_390_TLS_GOTIE20:
1057 case R_390_TLS_GOTIE64:
1058 case R_390_TLS_IEENT:
1059 if (bfd_link_pic (info))
1060 info->flags |= DF_STATIC_TLS;
1061 /* Fall through */
1062
1063 case R_390_GOT12:
1064 case R_390_GOT16:
1065 case R_390_GOT20:
1066 case R_390_GOT32:
1067 case R_390_GOT64:
1068 case R_390_GOTENT:
1069 case R_390_TLS_GD64:
1070 /* This symbol requires a global offset table entry. */
1071 switch (r_type)
1072 {
1073 default:
1074 case R_390_GOT12:
1075 case R_390_GOT16:
1076 case R_390_GOT20:
1077 case R_390_GOT32:
1078 case R_390_GOTENT:
1079 tls_type = GOT_NORMAL;
1080 break;
1081 case R_390_TLS_GD64:
1082 tls_type = GOT_TLS_GD;
1083 break;
1084 case R_390_TLS_IE64:
1085 case R_390_TLS_GOTIE64:
1086 tls_type = GOT_TLS_IE;
1087 break;
1088 case R_390_TLS_GOTIE12:
1089 case R_390_TLS_GOTIE20:
1090 case R_390_TLS_IEENT:
1091 tls_type = GOT_TLS_IE_NLT;
1092 break;
1093 }
1094
1095 if (h != NULL)
1096 {
1097 h->got.refcount += 1;
1098 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1099 }
1100 else
1101 {
1102 local_got_refcounts[r_symndx] += 1;
1103 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1104 }
1105 /* If a TLS symbol is accessed using IE at least once,
1106 there is no point to use dynamic model for it. */
1107 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1108 {
1109 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1110 {
1111 _bfd_error_handler
1112 /* xgettext:c-format */
1113 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1114 abfd, h->root.root.string);
1115 return FALSE;
1116 }
1117 if (old_tls_type > tls_type)
1118 tls_type = old_tls_type;
1119 }
1120
1121 if (old_tls_type != tls_type)
1122 {
1123 if (h != NULL)
1124 elf_s390_hash_entry (h)->tls_type = tls_type;
1125 else
1126 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1127 }
1128
1129 if (r_type != R_390_TLS_IE64)
1130 break;
1131 /* Fall through */
1132
1133 case R_390_TLS_LE64:
1134 /* For static linking and executables this reloc will be
1135 calculated at linktime otherwise a TLS_TPOFF runtime
1136 reloc will be generated. */
1137 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1138 break;
1139
1140 if (!bfd_link_pic (info))
1141 break;
1142 info->flags |= DF_STATIC_TLS;
1143 /* Fall through */
1144
1145 case R_390_8:
1146 case R_390_16:
1147 case R_390_32:
1148 case R_390_64:
1149 case R_390_PC12DBL:
1150 case R_390_PC16:
1151 case R_390_PC16DBL:
1152 case R_390_PC24DBL:
1153 case R_390_PC32:
1154 case R_390_PC32DBL:
1155 case R_390_PC64:
1156 if (h != NULL && bfd_link_executable (info))
1157 {
1158 /* If this reloc is in a read-only section, we might
1159 need a copy reloc. We can't check reliably at this
1160 stage whether the section is read-only, as input
1161 sections have not yet been mapped to output sections.
1162 Tentatively set the flag for now, and correct in
1163 adjust_dynamic_symbol. */
1164 h->non_got_ref = 1;
1165
1166 if (!bfd_link_pic (info))
1167 {
1168 /* We may need a .plt entry if the function this reloc
1169 refers to is in a shared lib. */
1170 h->plt.refcount += 1;
1171 }
1172 }
1173
1174 /* If we are creating a shared library, and this is a reloc
1175 against a global symbol, or a non PC relative reloc
1176 against a local symbol, then we need to copy the reloc
1177 into the shared library. However, if we are linking with
1178 -Bsymbolic, we do not need to copy a reloc against a
1179 global symbol which is defined in an object we are
1180 including in the link (i.e., DEF_REGULAR is set). At
1181 this point we have not seen all the input files, so it is
1182 possible that DEF_REGULAR is not set now but will be set
1183 later (it is never cleared). In case of a weak definition,
1184 DEF_REGULAR may be cleared later by a strong definition in
1185 a shared library. We account for that possibility below by
1186 storing information in the relocs_copied field of the hash
1187 table entry. A similar situation occurs when creating
1188 shared libraries and symbol visibility changes render the
1189 symbol local.
1190
1191 If on the other hand, we are creating an executable, we
1192 may need to keep relocations for symbols satisfied by a
1193 dynamic library if we manage to avoid copy relocs for the
1194 symbol. */
1195 if ((bfd_link_pic (info)
1196 && (sec->flags & SEC_ALLOC) != 0
1197 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1198 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1199 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1200 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1201 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1202 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1203 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1204 || (h != NULL
1205 && (! SYMBOLIC_BIND (info, h)
1206 || h->root.type == bfd_link_hash_defweak
1207 || !h->def_regular))))
1208 || (ELIMINATE_COPY_RELOCS
1209 && !bfd_link_pic (info)
1210 && (sec->flags & SEC_ALLOC) != 0
1211 && h != NULL
1212 && (h->root.type == bfd_link_hash_defweak
1213 || !h->def_regular)))
1214 {
1215 struct elf_dyn_relocs *p;
1216 struct elf_dyn_relocs **head;
1217
1218 /* We must copy these reloc types into the output file.
1219 Create a reloc section in dynobj and make room for
1220 this reloc. */
1221 if (sreloc == NULL)
1222 {
1223 if (htab->elf.dynobj == NULL)
1224 htab->elf.dynobj = abfd;
1225
1226 sreloc = _bfd_elf_make_dynamic_reloc_section
1227 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1228
1229 if (sreloc == NULL)
1230 return FALSE;
1231 }
1232
1233 /* If this is a global symbol, we count the number of
1234 relocations we need for this symbol. */
1235 if (h != NULL)
1236 {
1237 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1238 }
1239 else
1240 {
1241 /* Track dynamic relocs needed for local syms too.
1242 We really need local syms available to do this
1243 easily. Oh well. */
1244 asection *s;
1245 void *vpp;
1246
1247 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1248 abfd, r_symndx);
1249 if (isym == NULL)
1250 return FALSE;
1251
1252 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1253 if (s == NULL)
1254 s = sec;
1255
1256 vpp = &elf_section_data (s)->local_dynrel;
1257 head = (struct elf_dyn_relocs **) vpp;
1258 }
1259
1260 p = *head;
1261 if (p == NULL || p->sec != sec)
1262 {
1263 bfd_size_type amt = sizeof *p;
1264 p = ((struct elf_dyn_relocs *)
1265 bfd_alloc (htab->elf.dynobj, amt));
1266 if (p == NULL)
1267 return FALSE;
1268 p->next = *head;
1269 *head = p;
1270 p->sec = sec;
1271 p->count = 0;
1272 p->pc_count = 0;
1273 }
1274
1275 p->count += 1;
1276 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1277 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1278 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1279 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1280 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1281 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1282 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1283 p->pc_count += 1;
1284 }
1285 break;
1286
1287 /* This relocation describes the C++ object vtable hierarchy.
1288 Reconstruct it for later use during GC. */
1289 case R_390_GNU_VTINHERIT:
1290 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1291 return FALSE;
1292 break;
1293
1294 /* This relocation describes which C++ vtable entries are actually
1295 used. Record for later use during GC. */
1296 case R_390_GNU_VTENTRY:
1297 BFD_ASSERT (h != NULL);
1298 if (h != NULL
1299 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1300 return FALSE;
1301 break;
1302
1303 default:
1304 break;
1305 }
1306 }
1307
1308 return TRUE;
1309 }
1310
1311 /* Return the section that should be marked against GC for a given
1312 relocation. */
1313
1314 static asection *
1315 elf_s390_gc_mark_hook (asection *sec,
1316 struct bfd_link_info *info,
1317 Elf_Internal_Rela *rel,
1318 struct elf_link_hash_entry *h,
1319 Elf_Internal_Sym *sym)
1320 {
1321 if (h != NULL)
1322 switch (ELF64_R_TYPE (rel->r_info))
1323 {
1324 case R_390_GNU_VTINHERIT:
1325 case R_390_GNU_VTENTRY:
1326 return NULL;
1327 }
1328
1329 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1330 }
1331
1332 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1333 entry but we found we will not create any. Called when we find we will
1334 not have any PLT for this symbol, by for example
1335 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1336 or elf_s390_size_dynamic_sections if no dynamic sections will be
1337 created (we're only linking static objects). */
1338
1339 static void
1340 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1341 {
1342 if (h->elf.root.type == bfd_link_hash_warning)
1343 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1344
1345 if (h->gotplt_refcount <= 0)
1346 return;
1347
1348 /* We simply add the number of gotplt references to the number
1349 * of got references for this symbol. */
1350 h->elf.got.refcount += h->gotplt_refcount;
1351 h->gotplt_refcount = -1;
1352 }
1353
1354 /* Find dynamic relocs for H that apply to read-only sections. */
1355
1356 static asection *
1357 readonly_dynrelocs (struct elf_link_hash_entry *h)
1358 {
1359 struct elf_dyn_relocs *p;
1360
1361 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1362 {
1363 asection *s = p->sec->output_section;
1364
1365 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1366 return p->sec;
1367 }
1368 return NULL;
1369 }
1370
1371 /* Adjust a symbol defined by a dynamic object and referenced by a
1372 regular object. The current definition is in some section of the
1373 dynamic object, but we're not including those sections. We have to
1374 change the definition to something the rest of the link can
1375 understand. */
1376
1377 static bfd_boolean
1378 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1379 struct elf_link_hash_entry *h)
1380 {
1381 struct elf_s390_link_hash_table *htab;
1382 asection *s, *srel;
1383
1384 /* STT_GNU_IFUNC symbol must go through PLT. */
1385 if (s390_is_ifunc_symbol_p (h))
1386 {
1387 /* All local STT_GNU_IFUNC references must be treated as local
1388 calls via local PLT. */
1389 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1390 {
1391 bfd_size_type pc_count = 0, count = 0;
1392 struct elf_dyn_relocs **pp;
1393 struct elf_s390_link_hash_entry *eh;
1394 struct elf_dyn_relocs *p;
1395
1396 eh = (struct elf_s390_link_hash_entry *) h;
1397 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1398 {
1399 pc_count += p->pc_count;
1400 p->count -= p->pc_count;
1401 p->pc_count = 0;
1402 count += p->count;
1403 if (p->count == 0)
1404 *pp = p->next;
1405 else
1406 pp = &p->next;
1407 }
1408
1409 if (pc_count || count)
1410 {
1411 h->needs_plt = 1;
1412 h->non_got_ref = 1;
1413 if (h->plt.refcount <= 0)
1414 h->plt.refcount = 1;
1415 else
1416 h->plt.refcount += 1;
1417 }
1418 }
1419
1420 if (h->plt.refcount <= 0)
1421 {
1422 h->plt.offset = (bfd_vma) -1;
1423 h->needs_plt = 0;
1424 }
1425 return TRUE;
1426 }
1427
1428 /* If this is a function, put it in the procedure linkage table. We
1429 will fill in the contents of the procedure linkage table later
1430 (although we could actually do it here). */
1431 if (h->type == STT_FUNC
1432 || h->needs_plt)
1433 {
1434 if (h->plt.refcount <= 0
1435 || SYMBOL_CALLS_LOCAL (info, h)
1436 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1437 {
1438 /* This case can occur if we saw a PLT32 reloc in an input
1439 file, but the symbol was never referred to by a dynamic
1440 object, or if all references were garbage collected. In
1441 such a case, we don't actually need to build a procedure
1442 linkage table, and we can just do a PC32 reloc instead. */
1443 h->plt.offset = (bfd_vma) -1;
1444 h->needs_plt = 0;
1445 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1446 }
1447
1448 return TRUE;
1449 }
1450 else
1451 /* It's possible that we incorrectly decided a .plt reloc was
1452 needed for an R_390_PC32 reloc to a non-function sym in
1453 check_relocs. We can't decide accurately between function and
1454 non-function syms in check-relocs; Objects loaded later in
1455 the link may change h->type. So fix it now. */
1456 h->plt.offset = (bfd_vma) -1;
1457
1458 /* If this is a weak symbol, and there is a real definition, the
1459 processor independent code will have arranged for us to see the
1460 real definition first, and we can just use the same value. */
1461 if (h->is_weakalias)
1462 {
1463 struct elf_link_hash_entry *def = weakdef (h);
1464 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1465 h->root.u.def.section = def->root.u.def.section;
1466 h->root.u.def.value = def->root.u.def.value;
1467 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1468 h->non_got_ref = def->non_got_ref;
1469 return TRUE;
1470 }
1471
1472 /* This is a reference to a symbol defined by a dynamic object which
1473 is not a function. */
1474
1475 /* If we are creating a shared library, we must presume that the
1476 only references to the symbol are via the global offset table.
1477 For such cases we need not do anything here; the relocations will
1478 be handled correctly by relocate_section. */
1479 if (bfd_link_pic (info))
1480 return TRUE;
1481
1482 /* If there are no references to this symbol that do not use the
1483 GOT, we don't need to generate a copy reloc. */
1484 if (!h->non_got_ref)
1485 return TRUE;
1486
1487 /* If -z nocopyreloc was given, we won't generate them either. */
1488 if (info->nocopyreloc)
1489 {
1490 h->non_got_ref = 0;
1491 return TRUE;
1492 }
1493
1494 /* If we don't find any dynamic relocs in read-only sections, then
1495 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1496 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1497 {
1498 h->non_got_ref = 0;
1499 return TRUE;
1500 }
1501
1502 /* We must allocate the symbol in our .dynbss section, which will
1503 become part of the .bss section of the executable. There will be
1504 an entry for this symbol in the .dynsym section. The dynamic
1505 object will contain position independent code, so all references
1506 from the dynamic object to this symbol will go through the global
1507 offset table. The dynamic linker will use the .dynsym entry to
1508 determine the address it must put in the global offset table, so
1509 both the dynamic object and the regular object will refer to the
1510 same memory location for the variable. */
1511
1512 htab = elf_s390_hash_table (info);
1513 if (htab == NULL)
1514 return FALSE;
1515
1516 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1517 copy the initial value out of the dynamic object and into the
1518 runtime process image. */
1519 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1520 {
1521 s = htab->elf.sdynrelro;
1522 srel = htab->elf.sreldynrelro;
1523 }
1524 else
1525 {
1526 s = htab->elf.sdynbss;
1527 srel = htab->elf.srelbss;
1528 }
1529 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1530 {
1531 srel->size += sizeof (Elf64_External_Rela);
1532 h->needs_copy = 1;
1533 }
1534
1535 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1536 }
1537
1538 /* Allocate space in .plt, .got and associated reloc sections for
1539 dynamic relocs. */
1540
1541 static bfd_boolean
1542 allocate_dynrelocs (struct elf_link_hash_entry *h,
1543 void * inf)
1544 {
1545 struct bfd_link_info *info;
1546 struct elf_s390_link_hash_table *htab;
1547 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1548 struct elf_dyn_relocs *p;
1549
1550 if (h->root.type == bfd_link_hash_indirect)
1551 return TRUE;
1552
1553 info = (struct bfd_link_info *) inf;
1554 htab = elf_s390_hash_table (info);
1555 if (htab == NULL)
1556 return FALSE;
1557
1558 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1559 here if it is defined and referenced in a non-shared object. */
1560 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1561 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1562 else if (htab->elf.dynamic_sections_created
1563 && h->plt.refcount > 0)
1564 {
1565 /* Make sure this symbol is output as a dynamic symbol.
1566 Undefined weak syms won't yet be marked as dynamic. */
1567 if (h->dynindx == -1
1568 && !h->forced_local)
1569 {
1570 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1571 return FALSE;
1572 }
1573
1574 if (bfd_link_pic (info)
1575 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1576 {
1577 asection *s = htab->elf.splt;
1578
1579 /* If this is the first .plt entry, make room for the special
1580 first entry. */
1581 if (s->size == 0)
1582 s->size += PLT_FIRST_ENTRY_SIZE;
1583
1584 h->plt.offset = s->size;
1585
1586 /* If this symbol is not defined in a regular file, and we are
1587 not generating a shared library, then set the symbol to this
1588 location in the .plt. This is required to make function
1589 pointers compare as equal between the normal executable and
1590 the shared library. */
1591 if (! bfd_link_pic (info)
1592 && !h->def_regular)
1593 {
1594 h->root.u.def.section = s;
1595 h->root.u.def.value = h->plt.offset;
1596 }
1597
1598 /* Make room for this entry. */
1599 s->size += PLT_ENTRY_SIZE;
1600
1601 /* We also need to make an entry in the .got.plt section, which
1602 will be placed in the .got section by the linker script. */
1603 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1604
1605 /* We also need to make an entry in the .rela.plt section. */
1606 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1607 }
1608 else
1609 {
1610 h->plt.offset = (bfd_vma) -1;
1611 h->needs_plt = 0;
1612 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1613 }
1614 }
1615 else
1616 {
1617 h->plt.offset = (bfd_vma) -1;
1618 h->needs_plt = 0;
1619 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1620 }
1621
1622 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1623 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1624 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1625 we can save the dynamic TLS relocation. */
1626 if (h->got.refcount > 0
1627 && !bfd_link_pic (info)
1628 && h->dynindx == -1
1629 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1630 {
1631 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1632 /* For the GOTIE access without a literal pool entry the offset has
1633 to be stored somewhere. The immediate value in the instruction
1634 is not bit enough so the value is stored in the got. */
1635 {
1636 h->got.offset = htab->elf.sgot->size;
1637 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1638 }
1639 else
1640 h->got.offset = (bfd_vma) -1;
1641 }
1642 else if (h->got.refcount > 0)
1643 {
1644 asection *s;
1645 bfd_boolean dyn;
1646 int tls_type = elf_s390_hash_entry(h)->tls_type;
1647
1648 /* Make sure this symbol is output as a dynamic symbol.
1649 Undefined weak syms won't yet be marked as dynamic. */
1650 if (h->dynindx == -1
1651 && !h->forced_local)
1652 {
1653 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1654 return FALSE;
1655 }
1656
1657 s = htab->elf.sgot;
1658 h->got.offset = s->size;
1659 s->size += GOT_ENTRY_SIZE;
1660 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1661 if (tls_type == GOT_TLS_GD)
1662 s->size += GOT_ENTRY_SIZE;
1663 dyn = htab->elf.dynamic_sections_created;
1664 /* R_390_TLS_IE64 needs one dynamic relocation,
1665 R_390_TLS_GD64 needs one if local symbol and two if global. */
1666 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1667 || tls_type >= GOT_TLS_IE)
1668 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1669 else if (tls_type == GOT_TLS_GD)
1670 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1671 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1672 && (bfd_link_pic (info)
1673 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1674 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1675 }
1676 else
1677 h->got.offset = (bfd_vma) -1;
1678
1679 if (eh->dyn_relocs == NULL)
1680 return TRUE;
1681
1682 /* In the shared -Bsymbolic case, discard space allocated for
1683 dynamic pc-relative relocs against symbols which turn out to be
1684 defined in regular objects. For the normal shared case, discard
1685 space for pc-relative relocs that have become local due to symbol
1686 visibility changes. */
1687
1688 if (bfd_link_pic (info))
1689 {
1690 if (SYMBOL_CALLS_LOCAL (info, h))
1691 {
1692 struct elf_dyn_relocs **pp;
1693
1694 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1695 {
1696 p->count -= p->pc_count;
1697 p->pc_count = 0;
1698 if (p->count == 0)
1699 *pp = p->next;
1700 else
1701 pp = &p->next;
1702 }
1703 }
1704
1705 /* Also discard relocs on undefined weak syms with non-default
1706 visibility. */
1707 if (eh->dyn_relocs != NULL
1708 && h->root.type == bfd_link_hash_undefweak)
1709 {
1710 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1711 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1712 eh->dyn_relocs = NULL;
1713
1714 /* Make sure undefined weak symbols are output as a dynamic
1715 symbol in PIEs. */
1716 else if (h->dynindx == -1
1717 && !h->forced_local)
1718 {
1719 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1720 return FALSE;
1721 }
1722 }
1723 }
1724 else if (ELIMINATE_COPY_RELOCS)
1725 {
1726 /* For the non-shared case, discard space for relocs against
1727 symbols which turn out to need copy relocs or are not
1728 dynamic. */
1729
1730 if (!h->non_got_ref
1731 && ((h->def_dynamic
1732 && !h->def_regular)
1733 || (htab->elf.dynamic_sections_created
1734 && (h->root.type == bfd_link_hash_undefweak
1735 || h->root.type == bfd_link_hash_undefined))))
1736 {
1737 /* Make sure this symbol is output as a dynamic symbol.
1738 Undefined weak syms won't yet be marked as dynamic. */
1739 if (h->dynindx == -1
1740 && !h->forced_local)
1741 {
1742 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1743 return FALSE;
1744 }
1745
1746 /* If that succeeded, we know we'll be keeping all the
1747 relocs. */
1748 if (h->dynindx != -1)
1749 goto keep;
1750 }
1751
1752 eh->dyn_relocs = NULL;
1753
1754 keep: ;
1755 }
1756
1757 /* Finally, allocate space. */
1758 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1759 {
1760 asection *sreloc = elf_section_data (p->sec)->sreloc;
1761 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1762 }
1763
1764 return TRUE;
1765 }
1766
1767 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1768 read-only sections. */
1769
1770 static bfd_boolean
1771 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1772 {
1773 asection *sec;
1774
1775 if (h->root.type == bfd_link_hash_indirect)
1776 return TRUE;
1777
1778 sec = readonly_dynrelocs (h);
1779 if (sec != NULL)
1780 {
1781 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1782
1783 info->flags |= DF_TEXTREL;
1784 info->callbacks->minfo
1785 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1786 sec->owner, h->root.root.string, sec);
1787
1788 /* Not an error, just cut short the traversal. */
1789 return FALSE;
1790 }
1791 return TRUE;
1792 }
1793
1794 /* Set the sizes of the dynamic sections. */
1795
1796 static bfd_boolean
1797 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1798 struct bfd_link_info *info)
1799 {
1800 struct elf_s390_link_hash_table *htab;
1801 bfd *dynobj;
1802 asection *s;
1803 bfd_boolean relocs;
1804 bfd *ibfd;
1805
1806 htab = elf_s390_hash_table (info);
1807 if (htab == NULL)
1808 return FALSE;
1809
1810 dynobj = htab->elf.dynobj;
1811 if (dynobj == NULL)
1812 abort ();
1813
1814 if (htab->elf.dynamic_sections_created)
1815 {
1816 /* Set the contents of the .interp section to the interpreter. */
1817 if (bfd_link_executable (info) && !info->nointerp)
1818 {
1819 s = bfd_get_linker_section (dynobj, ".interp");
1820 if (s == NULL)
1821 abort ();
1822 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1823 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1824 }
1825 }
1826
1827 /* Set up .got offsets for local syms, and space for local dynamic
1828 relocs. */
1829 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1830 {
1831 bfd_signed_vma *local_got;
1832 bfd_signed_vma *end_local_got;
1833 char *local_tls_type;
1834 bfd_size_type locsymcount;
1835 Elf_Internal_Shdr *symtab_hdr;
1836 asection *srela;
1837 struct plt_entry *local_plt;
1838 unsigned int i;
1839
1840 if (! is_s390_elf (ibfd))
1841 continue;
1842
1843 for (s = ibfd->sections; s != NULL; s = s->next)
1844 {
1845 struct elf_dyn_relocs *p;
1846
1847 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1848 {
1849 if (!bfd_is_abs_section (p->sec)
1850 && bfd_is_abs_section (p->sec->output_section))
1851 {
1852 /* Input section has been discarded, either because
1853 it is a copy of a linkonce section or due to
1854 linker script /DISCARD/, so we'll be discarding
1855 the relocs too. */
1856 }
1857 else if (p->count != 0)
1858 {
1859 srela = elf_section_data (p->sec)->sreloc;
1860 srela->size += p->count * sizeof (Elf64_External_Rela);
1861 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1862 info->flags |= DF_TEXTREL;
1863 }
1864 }
1865 }
1866
1867 local_got = elf_local_got_refcounts (ibfd);
1868 if (!local_got)
1869 continue;
1870
1871 symtab_hdr = &elf_symtab_hdr (ibfd);
1872 locsymcount = symtab_hdr->sh_info;
1873 end_local_got = local_got + locsymcount;
1874 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1875 s = htab->elf.sgot;
1876 srela = htab->elf.srelgot;
1877 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1878 {
1879 if (*local_got > 0)
1880 {
1881 *local_got = s->size;
1882 s->size += GOT_ENTRY_SIZE;
1883 if (*local_tls_type == GOT_TLS_GD)
1884 s->size += GOT_ENTRY_SIZE;
1885 if (bfd_link_pic (info))
1886 srela->size += sizeof (Elf64_External_Rela);
1887 }
1888 else
1889 *local_got = (bfd_vma) -1;
1890 }
1891
1892 local_plt = elf_s390_local_plt (ibfd);
1893 for (i = 0; i < symtab_hdr->sh_info; i++)
1894 {
1895 if (local_plt[i].plt.refcount > 0)
1896 {
1897 local_plt[i].plt.offset = htab->elf.iplt->size;
1898 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1899 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1900 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1901 }
1902 else
1903 local_plt[i].plt.offset = (bfd_vma) -1;
1904 }
1905 }
1906
1907 if (htab->tls_ldm_got.refcount > 0)
1908 {
1909 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1910 relocs. */
1911 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1912 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1913 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1914 }
1915 else
1916 htab->tls_ldm_got.offset = -1;
1917
1918 /* Allocate global sym .plt and .got entries, and space for global
1919 sym dynamic relocs. */
1920 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1921
1922 /* We now have determined the sizes of the various dynamic sections.
1923 Allocate memory for them. */
1924 relocs = FALSE;
1925 for (s = dynobj->sections; s != NULL; s = s->next)
1926 {
1927 if ((s->flags & SEC_LINKER_CREATED) == 0)
1928 continue;
1929
1930 if (s == htab->elf.splt
1931 || s == htab->elf.sgot
1932 || s == htab->elf.sgotplt
1933 || s == htab->elf.sdynbss
1934 || s == htab->elf.sdynrelro
1935 || s == htab->elf.iplt
1936 || s == htab->elf.igotplt
1937 || s == htab->irelifunc)
1938 {
1939 /* Strip this section if we don't need it; see the
1940 comment below. */
1941 }
1942 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
1943 {
1944 if (s->size != 0 && s != htab->elf.srelplt)
1945 relocs = TRUE;
1946
1947 /* We use the reloc_count field as a counter if we need
1948 to copy relocs into the output file. */
1949 s->reloc_count = 0;
1950 }
1951 else
1952 {
1953 /* It's not one of our sections, so don't allocate space. */
1954 continue;
1955 }
1956
1957 if (s->size == 0)
1958 {
1959 /* If we don't need this section, strip it from the
1960 output file. This is to handle .rela.bss and
1961 .rela.plt. We must create it in
1962 create_dynamic_sections, because it must be created
1963 before the linker maps input sections to output
1964 sections. The linker does that before
1965 adjust_dynamic_symbol is called, and it is that
1966 function which decides whether anything needs to go
1967 into these sections. */
1968
1969 s->flags |= SEC_EXCLUDE;
1970 continue;
1971 }
1972
1973 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1974 continue;
1975
1976 /* Allocate memory for the section contents. We use bfd_zalloc
1977 here in case unused entries are not reclaimed before the
1978 section's contents are written out. This should not happen,
1979 but this way if it does, we get a R_390_NONE reloc instead
1980 of garbage. */
1981 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1982 if (s->contents == NULL)
1983 return FALSE;
1984 }
1985
1986 if (htab->elf.dynamic_sections_created)
1987 {
1988 /* Add some entries to the .dynamic section. We fill in the
1989 values later, in elf_s390_finish_dynamic_sections, but we
1990 must add the entries now so that we get the correct size for
1991 the .dynamic section. The DT_DEBUG entry is filled in by the
1992 dynamic linker and used by the debugger. */
1993 #define add_dynamic_entry(TAG, VAL) \
1994 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1995
1996 if (bfd_link_executable (info))
1997 {
1998 if (!add_dynamic_entry (DT_DEBUG, 0))
1999 return FALSE;
2000 }
2001
2002 if (htab->elf.splt->size != 0)
2003 {
2004 if (!add_dynamic_entry (DT_PLTGOT, 0)
2005 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2006 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2007 || !add_dynamic_entry (DT_JMPREL, 0))
2008 return FALSE;
2009 }
2010
2011 if (relocs)
2012 {
2013 if (!add_dynamic_entry (DT_RELA, 0)
2014 || !add_dynamic_entry (DT_RELASZ, 0)
2015 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2016 return FALSE;
2017
2018 /* If any dynamic relocs apply to a read-only section,
2019 then we need a DT_TEXTREL entry. */
2020 if ((info->flags & DF_TEXTREL) == 0)
2021 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2022
2023 if ((info->flags & DF_TEXTREL) != 0)
2024 {
2025 if (!add_dynamic_entry (DT_TEXTREL, 0))
2026 return FALSE;
2027 }
2028 }
2029 }
2030 #undef add_dynamic_entry
2031
2032 return TRUE;
2033 }
2034
2035 /* Return the base VMA address which should be subtracted from real addresses
2036 when resolving @dtpoff relocation.
2037 This is PT_TLS segment p_vaddr. */
2038
2039 static bfd_vma
2040 dtpoff_base (struct bfd_link_info *info)
2041 {
2042 /* If tls_sec is NULL, we should have signalled an error already. */
2043 if (elf_hash_table (info)->tls_sec == NULL)
2044 return 0;
2045 return elf_hash_table (info)->tls_sec->vma;
2046 }
2047
2048 /* Return the relocation value for @tpoff relocation
2049 if STT_TLS virtual address is ADDRESS. */
2050
2051 static bfd_vma
2052 tpoff (struct bfd_link_info *info, bfd_vma address)
2053 {
2054 struct elf_link_hash_table *htab = elf_hash_table (info);
2055
2056 /* If tls_sec is NULL, we should have signalled an error already. */
2057 if (htab->tls_sec == NULL)
2058 return 0;
2059 return htab->tls_size + htab->tls_sec->vma - address;
2060 }
2061
2062 /* Complain if TLS instruction relocation is against an invalid
2063 instruction. */
2064
2065 static void
2066 invalid_tls_insn (bfd *input_bfd,
2067 asection *input_section,
2068 Elf_Internal_Rela *rel)
2069 {
2070 reloc_howto_type *howto;
2071
2072 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2073 _bfd_error_handler
2074 /* xgettext:c-format */
2075 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2076 input_bfd,
2077 input_section,
2078 (uint64_t) rel->r_offset,
2079 howto->name);
2080 bfd_set_error (bfd_error_bad_value);
2081 }
2082
2083 /* Relocate a 390 ELF section. */
2084
2085 static bfd_boolean
2086 elf_s390_relocate_section (bfd *output_bfd,
2087 struct bfd_link_info *info,
2088 bfd *input_bfd,
2089 asection *input_section,
2090 bfd_byte *contents,
2091 Elf_Internal_Rela *relocs,
2092 Elf_Internal_Sym *local_syms,
2093 asection **local_sections)
2094 {
2095 struct elf_s390_link_hash_table *htab;
2096 Elf_Internal_Shdr *symtab_hdr;
2097 struct elf_link_hash_entry **sym_hashes;
2098 bfd_vma *local_got_offsets;
2099 Elf_Internal_Rela *rel;
2100 Elf_Internal_Rela *relend;
2101
2102 BFD_ASSERT (is_s390_elf (input_bfd));
2103
2104 htab = elf_s390_hash_table (info);
2105 if (htab == NULL)
2106 return FALSE;
2107
2108 symtab_hdr = &elf_symtab_hdr (input_bfd);
2109 sym_hashes = elf_sym_hashes (input_bfd);
2110 local_got_offsets = elf_local_got_offsets (input_bfd);
2111
2112 rel = relocs;
2113 relend = relocs + input_section->reloc_count;
2114 for (; rel < relend; rel++)
2115 {
2116 unsigned int r_type;
2117 reloc_howto_type *howto;
2118 unsigned long r_symndx;
2119 struct elf_link_hash_entry *h;
2120 Elf_Internal_Sym *sym;
2121 asection *sec;
2122 bfd_vma off;
2123 bfd_vma relocation;
2124 bfd_boolean unresolved_reloc;
2125 bfd_reloc_status_type r;
2126 int tls_type;
2127 asection *base_got = htab->elf.sgot;
2128 bfd_boolean resolved_to_zero;
2129
2130 r_type = ELF64_R_TYPE (rel->r_info);
2131 if (r_type == (int) R_390_GNU_VTINHERIT
2132 || r_type == (int) R_390_GNU_VTENTRY)
2133 continue;
2134 if (r_type >= (int) R_390_max)
2135 {
2136 bfd_set_error (bfd_error_bad_value);
2137 return FALSE;
2138 }
2139
2140 howto = elf_howto_table + r_type;
2141 r_symndx = ELF64_R_SYM (rel->r_info);
2142
2143 h = NULL;
2144 sym = NULL;
2145 sec = NULL;
2146 unresolved_reloc = FALSE;
2147 if (r_symndx < symtab_hdr->sh_info)
2148 {
2149 sym = local_syms + r_symndx;
2150 sec = local_sections[r_symndx];
2151
2152 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2153 {
2154 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2155 if (local_plt == NULL)
2156 return FALSE;
2157
2158 /* Address of the PLT slot. */
2159 relocation = (htab->elf.iplt->output_section->vma
2160 + htab->elf.iplt->output_offset
2161 + local_plt[r_symndx].plt.offset);
2162
2163 switch (r_type)
2164 {
2165 case R_390_PLTOFF16:
2166 case R_390_PLTOFF32:
2167 case R_390_PLTOFF64:
2168 relocation -= htab->elf.sgot->output_section->vma;
2169 break;
2170 case R_390_GOTPLT12:
2171 case R_390_GOTPLT16:
2172 case R_390_GOTPLT20:
2173 case R_390_GOTPLT32:
2174 case R_390_GOTPLT64:
2175 case R_390_GOTPLTENT:
2176 case R_390_GOT12:
2177 case R_390_GOT16:
2178 case R_390_GOT20:
2179 case R_390_GOT32:
2180 case R_390_GOT64:
2181 case R_390_GOTENT:
2182 {
2183 /* Write the PLT slot address into the GOT slot. */
2184 bfd_put_64 (output_bfd, relocation,
2185 htab->elf.sgot->contents +
2186 local_got_offsets[r_symndx]);
2187 relocation = (local_got_offsets[r_symndx] +
2188 htab->elf.sgot->output_offset);
2189
2190 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2191 relocation += htab->elf.sgot->output_section->vma;
2192 break;
2193 }
2194 default:
2195 break;
2196 }
2197 /* The output section is needed later in
2198 finish_dynamic_section when creating the dynamic
2199 relocation. */
2200 local_plt[r_symndx].sec = sec;
2201 goto do_relocation;
2202 }
2203 else
2204 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2205 }
2206 else
2207 {
2208 bfd_boolean warned ATTRIBUTE_UNUSED;
2209 bfd_boolean ignored ATTRIBUTE_UNUSED;
2210
2211 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2212 r_symndx, symtab_hdr, sym_hashes,
2213 h, sec, relocation,
2214 unresolved_reloc, warned, ignored);
2215 }
2216
2217 if (sec != NULL && discarded_section (sec))
2218 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2219 rel, 1, relend, howto, 0, contents);
2220
2221 if (bfd_link_relocatable (info))
2222 continue;
2223
2224 resolved_to_zero = (h != NULL
2225 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2226
2227 switch (r_type)
2228 {
2229 case R_390_GOTPLT12:
2230 case R_390_GOTPLT16:
2231 case R_390_GOTPLT20:
2232 case R_390_GOTPLT32:
2233 case R_390_GOTPLT64:
2234 case R_390_GOTPLTENT:
2235 /* There are three cases for a GOTPLT relocation. 1) The
2236 relocation is against the jump slot entry of a plt that
2237 will get emitted to the output file. 2) The relocation
2238 is against the jump slot of a plt entry that has been
2239 removed. elf_s390_adjust_gotplt has created a GOT entry
2240 as replacement. 3) The relocation is against a local symbol.
2241 Cases 2) and 3) are the same as the GOT relocation code
2242 so we just have to test for case 1 and fall through for
2243 the other two. */
2244 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2245 {
2246 bfd_vma plt_index;
2247
2248 if (s390_is_ifunc_symbol_p (h))
2249 {
2250 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2251 relocation = (plt_index * GOT_ENTRY_SIZE +
2252 htab->elf.igotplt->output_offset);
2253 if (r_type == R_390_GOTPLTENT)
2254 relocation += htab->elf.igotplt->output_section->vma;
2255 }
2256 else
2257 {
2258 /* Calc. index no.
2259 Current offset - size first entry / entry size. */
2260 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2261 PLT_ENTRY_SIZE;
2262
2263 /* Offset in GOT is PLT index plus GOT headers(3)
2264 times 8, addr & GOT addr. */
2265 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2266 if (r_type == R_390_GOTPLTENT)
2267 relocation += htab->elf.sgot->output_section->vma;
2268 }
2269 unresolved_reloc = FALSE;
2270 break;
2271 }
2272 /* Fall through. */
2273
2274 case R_390_GOT12:
2275 case R_390_GOT16:
2276 case R_390_GOT20:
2277 case R_390_GOT32:
2278 case R_390_GOT64:
2279 case R_390_GOTENT:
2280 /* Relocation is to the entry for this symbol in the global
2281 offset table. */
2282 if (base_got == NULL)
2283 abort ();
2284
2285 if (h != NULL)
2286 {
2287 bfd_boolean dyn;
2288
2289 off = h->got.offset;
2290 dyn = htab->elf.dynamic_sections_created;
2291
2292 if (s390_is_ifunc_symbol_p (h))
2293 {
2294 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2295 if (off == (bfd_vma)-1)
2296 {
2297 /* No explicit GOT usage so redirect to the
2298 got.iplt slot. */
2299 base_got = htab->elf.igotplt;
2300 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2301 }
2302 else
2303 {
2304 /* Explicit GOT slots must contain the address
2305 of the PLT slot. This will be handled in
2306 finish_dynamic_symbol. */
2307 }
2308 }
2309 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2310 bfd_link_pic (info),
2311 h)
2312 || (bfd_link_pic (info)
2313 && SYMBOL_REFERENCES_LOCAL (info, h))
2314 || resolved_to_zero)
2315 {
2316 /* This is actually a static link, or it is a
2317 -Bsymbolic link and the symbol is defined
2318 locally, or the symbol was forced to be local
2319 because of a version file. We must initialize
2320 this entry in the global offset table. Since the
2321 offset must always be a multiple of 2, we use the
2322 least significant bit to record whether we have
2323 initialized it already.
2324
2325 When doing a dynamic link, we create a .rel.got
2326 relocation entry to initialize the value. This
2327 is done in the finish_dynamic_symbol routine. */
2328 if ((off & 1) != 0)
2329 off &= ~1;
2330 else
2331 {
2332 bfd_put_64 (output_bfd, relocation,
2333 base_got->contents + off);
2334 h->got.offset |= 1;
2335 }
2336
2337 if ((h->def_regular
2338 && bfd_link_pic (info)
2339 && SYMBOL_REFERENCES_LOCAL (info, h))
2340 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2341 && ((r_type == R_390_GOTENT
2342 && (bfd_get_16 (input_bfd,
2343 contents + rel->r_offset - 2)
2344 & 0xff0f) == 0xc408)
2345 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2346 || (r_type == R_390_GOT20
2347 && (bfd_get_32 (input_bfd,
2348 contents + rel->r_offset - 2)
2349 & 0xff00f000) == 0xe300c000
2350 && bfd_get_8 (input_bfd,
2351 contents + rel->r_offset + 3) == 0x04)))
2352
2353 {
2354 unsigned short new_insn =
2355 (0xc000 | (bfd_get_8 (input_bfd,
2356 contents + rel->r_offset - 1) & 0xf0));
2357 bfd_put_16 (output_bfd, new_insn,
2358 contents + rel->r_offset - 2);
2359 r_type = R_390_PC32DBL;
2360 rel->r_addend = 2;
2361 howto = elf_howto_table + r_type;
2362 relocation = h->root.u.def.value
2363 + h->root.u.def.section->output_section->vma
2364 + h->root.u.def.section->output_offset;
2365 goto do_relocation;
2366 }
2367 }
2368 else
2369 unresolved_reloc = FALSE;
2370 }
2371 else
2372 {
2373 if (local_got_offsets == NULL)
2374 abort ();
2375
2376 off = local_got_offsets[r_symndx];
2377
2378 /* The offset must always be a multiple of 8. We use
2379 the least significant bit to record whether we have
2380 already generated the necessary reloc. */
2381 if ((off & 1) != 0)
2382 off &= ~1;
2383 else
2384 {
2385 bfd_put_64 (output_bfd, relocation,
2386 htab->elf.sgot->contents + off);
2387
2388 if (bfd_link_pic (info))
2389 {
2390 asection *s;
2391 Elf_Internal_Rela outrel;
2392 bfd_byte *loc;
2393
2394 s = htab->elf.srelgot;
2395 if (s == NULL)
2396 abort ();
2397
2398 outrel.r_offset = (htab->elf.sgot->output_section->vma
2399 + htab->elf.sgot->output_offset
2400 + off);
2401 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2402 outrel.r_addend = relocation;
2403 loc = s->contents;
2404 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2405 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2406 }
2407
2408 local_got_offsets[r_symndx] |= 1;
2409 }
2410 }
2411
2412 if (off >= (bfd_vma) -2)
2413 abort ();
2414
2415 relocation = base_got->output_offset + off;
2416
2417 /* For @GOTENT the relocation is against the offset between
2418 the instruction and the symbols entry in the GOT and not
2419 between the start of the GOT and the symbols entry. We
2420 add the vma of the GOT to get the correct value. */
2421 if ( r_type == R_390_GOTENT
2422 || r_type == R_390_GOTPLTENT)
2423 relocation += base_got->output_section->vma;
2424
2425 break;
2426
2427 case R_390_GOTOFF16:
2428 case R_390_GOTOFF32:
2429 case R_390_GOTOFF64:
2430 /* Relocation is relative to the start of the global offset
2431 table. */
2432
2433 if (h != NULL
2434 && s390_is_ifunc_symbol_p (h)
2435 && h->def_regular
2436 && !bfd_link_executable (info))
2437 {
2438 relocation = (htab->elf.iplt->output_section->vma
2439 + htab->elf.iplt->output_offset
2440 + h->plt.offset
2441 - htab->elf.sgot->output_section->vma);
2442 goto do_relocation;
2443 }
2444
2445 /* Note that sgot->output_offset is not involved in this
2446 calculation. We always want the start of .got. If we
2447 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2448 permitted by the ABI, we might have to change this
2449 calculation. */
2450 relocation -= htab->elf.sgot->output_section->vma;
2451 break;
2452
2453 case R_390_GOTPC:
2454 case R_390_GOTPCDBL:
2455 /* Use global offset table as symbol value. */
2456 relocation = htab->elf.sgot->output_section->vma;
2457 unresolved_reloc = FALSE;
2458 break;
2459
2460 case R_390_PLT12DBL:
2461 case R_390_PLT16DBL:
2462 case R_390_PLT24DBL:
2463 case R_390_PLT32:
2464 case R_390_PLT32DBL:
2465 case R_390_PLT64:
2466 /* Relocation is to the entry for this symbol in the
2467 procedure linkage table. */
2468
2469 /* Resolve a PLT32 reloc against a local symbol directly,
2470 without using the procedure linkage table. */
2471 if (h == NULL)
2472 break;
2473
2474 if (h->plt.offset == (bfd_vma) -1
2475 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2476 {
2477 /* We didn't make a PLT entry for this symbol. This
2478 happens when statically linking PIC code, or when
2479 using -Bsymbolic. */
2480 break;
2481 }
2482 if (s390_is_ifunc_symbol_p (h))
2483 relocation = (htab->elf.iplt->output_section->vma
2484 + htab->elf.iplt->output_offset
2485 + h->plt.offset);
2486 else
2487 relocation = (htab->elf.splt->output_section->vma
2488 + htab->elf.splt->output_offset
2489 + h->plt.offset);
2490 unresolved_reloc = FALSE;
2491 break;
2492
2493 case R_390_PLTOFF16:
2494 case R_390_PLTOFF32:
2495 case R_390_PLTOFF64:
2496 /* Relocation is to the entry for this symbol in the
2497 procedure linkage table relative to the start of the GOT. */
2498
2499 /* For local symbols or if we didn't make a PLT entry for
2500 this symbol resolve the symbol directly. */
2501 if (h == NULL
2502 || h->plt.offset == (bfd_vma) -1
2503 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2504 {
2505 relocation -= htab->elf.sgot->output_section->vma;
2506 break;
2507 }
2508
2509 if (s390_is_ifunc_symbol_p (h))
2510 relocation = (htab->elf.iplt->output_section->vma
2511 + htab->elf.iplt->output_offset
2512 + h->plt.offset
2513 - htab->elf.sgot->output_section->vma);
2514 else
2515 relocation = (htab->elf.splt->output_section->vma
2516 + htab->elf.splt->output_offset
2517 + h->plt.offset
2518 - htab->elf.sgot->output_section->vma);
2519 unresolved_reloc = FALSE;
2520 break;
2521
2522 case R_390_PC16:
2523 case R_390_PC12DBL:
2524 case R_390_PC16DBL:
2525 case R_390_PC24DBL:
2526 case R_390_PC32:
2527 case R_390_PC32DBL:
2528 case R_390_PC64:
2529 if (h != NULL
2530 && bfd_link_pie (info)
2531 && !h->def_regular)
2532 {
2533 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2534 "in shared library and accessed "
2535 "from executable "
2536 "(rebuild file with -fPIC ?)"),
2537 input_bfd, h->root.root.string);
2538 bfd_set_error (bfd_error_bad_value);
2539 return FALSE;
2540 }
2541 /* The target of these relocs are instruction operands
2542 residing in read-only sections. We cannot emit a runtime
2543 reloc for it. */
2544 if (h != NULL
2545 && s390_is_ifunc_symbol_p (h)
2546 && h->def_regular
2547 && bfd_link_pic (info))
2548 {
2549 relocation = (htab->elf.iplt->output_section->vma
2550 + htab->elf.iplt->output_offset
2551 + h->plt.offset);
2552 goto do_relocation;
2553 }
2554 /* Fall through. */
2555
2556 case R_390_8:
2557 case R_390_16:
2558 case R_390_32:
2559 case R_390_64:
2560
2561 if (h != NULL
2562 && s390_is_ifunc_symbol_p (h)
2563 && h->def_regular)
2564 {
2565 if (!bfd_link_pic (info))
2566 {
2567 /* For a non-shared object the symbol will not
2568 change. Hence we can write the address of the
2569 target IPLT slot now. */
2570 relocation = (htab->elf.iplt->output_section->vma
2571 + htab->elf.iplt->output_offset
2572 + h ->plt.offset);
2573 goto do_relocation;
2574 }
2575 else
2576 {
2577 /* For shared objects a runtime relocation is needed. */
2578
2579 Elf_Internal_Rela outrel;
2580 asection *sreloc;
2581
2582 /* Need a dynamic relocation to get the real function
2583 address. */
2584 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2585 info,
2586 input_section,
2587 rel->r_offset);
2588 if (outrel.r_offset == (bfd_vma) -1
2589 || outrel.r_offset == (bfd_vma) -2)
2590 abort ();
2591
2592 outrel.r_offset += (input_section->output_section->vma
2593 + input_section->output_offset);
2594
2595 if (h->dynindx == -1
2596 || h->forced_local
2597 || bfd_link_executable (info))
2598 {
2599 /* This symbol is resolved locally. */
2600 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2601 outrel.r_addend = (h->root.u.def.value
2602 + h->root.u.def.section->output_section->vma
2603 + h->root.u.def.section->output_offset);
2604 }
2605 else
2606 {
2607 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2608 outrel.r_addend = 0;
2609 }
2610
2611 sreloc = htab->elf.irelifunc;
2612 elf_append_rela (output_bfd, sreloc, &outrel);
2613
2614 /* If this reloc is against an external symbol, we
2615 do not want to fiddle with the addend. Otherwise,
2616 we need to include the symbol value so that it
2617 becomes an addend for the dynamic reloc. For an
2618 internal symbol, we have updated addend. */
2619 continue;
2620 }
2621 }
2622
2623 if ((input_section->flags & SEC_ALLOC) == 0)
2624 break;
2625
2626 if ((bfd_link_pic (info)
2627 && (h == NULL
2628 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2629 && !resolved_to_zero)
2630 || h->root.type != bfd_link_hash_undefweak)
2631 && ((r_type != R_390_PC16
2632 && r_type != R_390_PC12DBL
2633 && r_type != R_390_PC16DBL
2634 && r_type != R_390_PC24DBL
2635 && r_type != R_390_PC32
2636 && r_type != R_390_PC32DBL
2637 && r_type != R_390_PC64)
2638 || !SYMBOL_CALLS_LOCAL (info, h)))
2639 || (ELIMINATE_COPY_RELOCS
2640 && !bfd_link_pic (info)
2641 && h != NULL
2642 && h->dynindx != -1
2643 && !h->non_got_ref
2644 && ((h->def_dynamic
2645 && !h->def_regular)
2646 || h->root.type == bfd_link_hash_undefweak
2647 || h->root.type == bfd_link_hash_undefined)))
2648 {
2649 Elf_Internal_Rela outrel;
2650 bfd_boolean skip, relocate;
2651 asection *sreloc;
2652 bfd_byte *loc;
2653
2654 /* When generating a shared object, these relocations
2655 are copied into the output file to be resolved at run
2656 time. */
2657 skip = FALSE;
2658 relocate = FALSE;
2659
2660 outrel.r_offset =
2661 _bfd_elf_section_offset (output_bfd, info, input_section,
2662 rel->r_offset);
2663 if (outrel.r_offset == (bfd_vma) -1)
2664 skip = TRUE;
2665 else if (outrel.r_offset == (bfd_vma) -2)
2666 skip = TRUE, relocate = TRUE;
2667
2668 outrel.r_offset += (input_section->output_section->vma
2669 + input_section->output_offset);
2670
2671 if (skip)
2672 memset (&outrel, 0, sizeof outrel);
2673 else if (h != NULL
2674 && h->dynindx != -1
2675 && (r_type == R_390_PC16
2676 || r_type == R_390_PC12DBL
2677 || r_type == R_390_PC16DBL
2678 || r_type == R_390_PC24DBL
2679 || r_type == R_390_PC32
2680 || r_type == R_390_PC32DBL
2681 || r_type == R_390_PC64
2682 || !bfd_link_pic (info)
2683 || !SYMBOLIC_BIND (info, h)
2684 || !h->def_regular))
2685 {
2686 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2687 outrel.r_addend = rel->r_addend;
2688 }
2689 else
2690 {
2691 /* This symbol is local, or marked to become local. */
2692 outrel.r_addend = relocation + rel->r_addend;
2693 if (r_type == R_390_64)
2694 {
2695 relocate = TRUE;
2696 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2697 }
2698 else
2699 {
2700 long sindx;
2701
2702 if (bfd_is_abs_section (sec))
2703 sindx = 0;
2704 else if (sec == NULL || sec->owner == NULL)
2705 {
2706 bfd_set_error(bfd_error_bad_value);
2707 return FALSE;
2708 }
2709 else
2710 {
2711 asection *osec;
2712
2713 osec = sec->output_section;
2714 sindx = elf_section_data (osec)->dynindx;
2715
2716 if (sindx == 0)
2717 {
2718 osec = htab->elf.text_index_section;
2719 sindx = elf_section_data (osec)->dynindx;
2720 }
2721 BFD_ASSERT (sindx != 0);
2722
2723 /* We are turning this relocation into one
2724 against a section symbol, so subtract out
2725 the output section's address but not the
2726 offset of the input section in the output
2727 section. */
2728 outrel.r_addend -= osec->vma;
2729 }
2730 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2731 }
2732 }
2733
2734 sreloc = elf_section_data (input_section)->sreloc;
2735 if (sreloc == NULL)
2736 abort ();
2737
2738 loc = sreloc->contents;
2739 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2740 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2741
2742 /* If this reloc is against an external symbol, we do
2743 not want to fiddle with the addend. Otherwise, we
2744 need to include the symbol value so that it becomes
2745 an addend for the dynamic reloc. */
2746 if (! relocate)
2747 continue;
2748 }
2749
2750 break;
2751
2752 /* Relocations for tls literal pool entries. */
2753 case R_390_TLS_IE64:
2754 if (bfd_link_pic (info))
2755 {
2756 Elf_Internal_Rela outrel;
2757 asection *sreloc;
2758 bfd_byte *loc;
2759
2760 outrel.r_offset = rel->r_offset
2761 + input_section->output_section->vma
2762 + input_section->output_offset;
2763 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2764 sreloc = elf_section_data (input_section)->sreloc;
2765 if (sreloc == NULL)
2766 abort ();
2767 loc = sreloc->contents;
2768 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2769 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2770 }
2771 /* Fall through. */
2772
2773 case R_390_TLS_GD64:
2774 case R_390_TLS_GOTIE64:
2775 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2776 tls_type = GOT_UNKNOWN;
2777 if (h == NULL && local_got_offsets)
2778 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2779 else if (h != NULL)
2780 {
2781 tls_type = elf_s390_hash_entry(h)->tls_type;
2782 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2783 r_type = R_390_TLS_LE64;
2784 }
2785 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2786 r_type = R_390_TLS_IE64;
2787
2788 if (r_type == R_390_TLS_LE64)
2789 {
2790 /* This relocation gets optimized away by the local exec
2791 access optimization. */
2792 BFD_ASSERT (! unresolved_reloc);
2793 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2794 contents + rel->r_offset);
2795 continue;
2796 }
2797
2798 if (htab->elf.sgot == NULL)
2799 abort ();
2800
2801 if (h != NULL)
2802 off = h->got.offset;
2803 else
2804 {
2805 if (local_got_offsets == NULL)
2806 abort ();
2807
2808 off = local_got_offsets[r_symndx];
2809 }
2810
2811 emit_tls_relocs:
2812
2813 if ((off & 1) != 0)
2814 off &= ~1;
2815 else
2816 {
2817 Elf_Internal_Rela outrel;
2818 bfd_byte *loc;
2819 int dr_type, indx;
2820
2821 if (htab->elf.srelgot == NULL)
2822 abort ();
2823
2824 outrel.r_offset = (htab->elf.sgot->output_section->vma
2825 + htab->elf.sgot->output_offset + off);
2826
2827 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2828 if (r_type == R_390_TLS_GD64)
2829 dr_type = R_390_TLS_DTPMOD;
2830 else
2831 dr_type = R_390_TLS_TPOFF;
2832 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2833 outrel.r_addend = relocation - dtpoff_base (info);
2834 else
2835 outrel.r_addend = 0;
2836 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2837 loc = htab->elf.srelgot->contents;
2838 loc += htab->elf.srelgot->reloc_count++
2839 * sizeof (Elf64_External_Rela);
2840 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2841
2842 if (r_type == R_390_TLS_GD64)
2843 {
2844 if (indx == 0)
2845 {
2846 BFD_ASSERT (! unresolved_reloc);
2847 bfd_put_64 (output_bfd,
2848 relocation - dtpoff_base (info),
2849 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2850 }
2851 else
2852 {
2853 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2854 outrel.r_offset += GOT_ENTRY_SIZE;
2855 outrel.r_addend = 0;
2856 htab->elf.srelgot->reloc_count++;
2857 loc += sizeof (Elf64_External_Rela);
2858 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2859 }
2860 }
2861
2862 if (h != NULL)
2863 h->got.offset |= 1;
2864 else
2865 local_got_offsets[r_symndx] |= 1;
2866 }
2867
2868 if (off >= (bfd_vma) -2)
2869 abort ();
2870 if (r_type == ELF64_R_TYPE (rel->r_info))
2871 {
2872 relocation = htab->elf.sgot->output_offset + off;
2873 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2874 relocation += htab->elf.sgot->output_section->vma;
2875 unresolved_reloc = FALSE;
2876 }
2877 else
2878 {
2879 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2880 contents + rel->r_offset);
2881 continue;
2882 }
2883 break;
2884
2885 case R_390_TLS_GOTIE12:
2886 case R_390_TLS_GOTIE20:
2887 case R_390_TLS_IEENT:
2888 if (h == NULL)
2889 {
2890 if (local_got_offsets == NULL)
2891 abort();
2892 off = local_got_offsets[r_symndx];
2893 if (bfd_link_pic (info))
2894 goto emit_tls_relocs;
2895 }
2896 else
2897 {
2898 off = h->got.offset;
2899 tls_type = elf_s390_hash_entry(h)->tls_type;
2900 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2901 goto emit_tls_relocs;
2902 }
2903
2904 if (htab->elf.sgot == NULL)
2905 abort ();
2906
2907 BFD_ASSERT (! unresolved_reloc);
2908 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2909 htab->elf.sgot->contents + off);
2910 relocation = htab->elf.sgot->output_offset + off;
2911 if (r_type == R_390_TLS_IEENT)
2912 relocation += htab->elf.sgot->output_section->vma;
2913 unresolved_reloc = FALSE;
2914 break;
2915
2916 case R_390_TLS_LDM64:
2917 if (! bfd_link_pic (info))
2918 /* The literal pool entry this relocation refers to gets ignored
2919 by the optimized code of the local exec model. Do nothing
2920 and the value will turn out zero. */
2921 continue;
2922
2923 if (htab->elf.sgot == NULL)
2924 abort ();
2925
2926 off = htab->tls_ldm_got.offset;
2927 if (off & 1)
2928 off &= ~1;
2929 else
2930 {
2931 Elf_Internal_Rela outrel;
2932 bfd_byte *loc;
2933
2934 if (htab->elf.srelgot == NULL)
2935 abort ();
2936
2937 outrel.r_offset = (htab->elf.sgot->output_section->vma
2938 + htab->elf.sgot->output_offset + off);
2939
2940 bfd_put_64 (output_bfd, 0,
2941 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2942 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2943 outrel.r_addend = 0;
2944 loc = htab->elf.srelgot->contents;
2945 loc += htab->elf.srelgot->reloc_count++
2946 * sizeof (Elf64_External_Rela);
2947 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2948 htab->tls_ldm_got.offset |= 1;
2949 }
2950 relocation = htab->elf.sgot->output_offset + off;
2951 unresolved_reloc = FALSE;
2952 break;
2953
2954 case R_390_TLS_LE64:
2955 if (bfd_link_dll (info))
2956 {
2957 /* Linking a shared library with non-fpic code requires
2958 a R_390_TLS_TPOFF relocation. */
2959 Elf_Internal_Rela outrel;
2960 asection *sreloc;
2961 bfd_byte *loc;
2962 int indx;
2963
2964 outrel.r_offset = rel->r_offset
2965 + input_section->output_section->vma
2966 + input_section->output_offset;
2967 if (h != NULL && h->dynindx != -1)
2968 indx = h->dynindx;
2969 else
2970 indx = 0;
2971 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2972 if (indx == 0)
2973 outrel.r_addend = relocation - dtpoff_base (info);
2974 else
2975 outrel.r_addend = 0;
2976 sreloc = elf_section_data (input_section)->sreloc;
2977 if (sreloc == NULL)
2978 abort ();
2979 loc = sreloc->contents;
2980 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2981 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2982 }
2983 else
2984 {
2985 BFD_ASSERT (! unresolved_reloc);
2986 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2987 contents + rel->r_offset);
2988 }
2989 continue;
2990
2991 case R_390_TLS_LDO64:
2992 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
2993 relocation -= dtpoff_base (info);
2994 else
2995 /* When converting LDO to LE, we must negate. */
2996 relocation = -tpoff (info, relocation);
2997 break;
2998
2999 /* Relocations for tls instructions. */
3000 case R_390_TLS_LOAD:
3001 case R_390_TLS_GDCALL:
3002 case R_390_TLS_LDCALL:
3003 tls_type = GOT_UNKNOWN;
3004 if (h == NULL && local_got_offsets)
3005 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3006 else if (h != NULL)
3007 tls_type = elf_s390_hash_entry(h)->tls_type;
3008
3009 if (tls_type == GOT_TLS_GD)
3010 continue;
3011
3012 if (r_type == R_390_TLS_LOAD)
3013 {
3014 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3015 {
3016 /* IE->LE transition. Four valid cases:
3017 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3018 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3019 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3020 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3021 unsigned int insn0, insn1, ry;
3022
3023 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3024 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3025 if (insn1 != 0x0004)
3026 {
3027 invalid_tls_insn (input_bfd, input_section, rel);
3028 return FALSE;
3029 }
3030 if ((insn0 & 0xff00f000) == 0xe3000000)
3031 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3032 ry = (insn0 & 0x000f0000);
3033 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3034 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3035 ry = (insn0 & 0x0000f000) << 4;
3036 else if ((insn0 & 0xff00f000) == 0xe300c000)
3037 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3038 ry = (insn0 & 0x000f0000);
3039 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3040 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3041 ry = (insn0 & 0x0000f000) << 4;
3042 else
3043 {
3044 invalid_tls_insn (input_bfd, input_section, rel);
3045 return FALSE;
3046 }
3047 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3048 insn1 = 0x000d;
3049 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3050 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3051 }
3052 }
3053 else if (r_type == R_390_TLS_GDCALL)
3054 {
3055 unsigned int insn0, insn1;
3056
3057 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3058 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3059 if ((insn0 & 0xffff0000) != 0xc0e50000)
3060 {
3061 invalid_tls_insn (input_bfd, input_section, rel);
3062 return FALSE;
3063 }
3064 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3065 {
3066 /* GD->LE transition.
3067 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3068 insn0 = 0xc0040000;
3069 insn1 = 0x0000;
3070 }
3071 else
3072 {
3073 /* GD->IE transition.
3074 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3075 insn0 = 0xe322c000;
3076 insn1 = 0x0004;
3077 }
3078 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3079 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3080 }
3081 else if (r_type == R_390_TLS_LDCALL)
3082 {
3083 if (!bfd_link_pic (info))
3084 {
3085 unsigned int insn0, insn1;
3086
3087 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3088 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3089 if ((insn0 & 0xffff0000) != 0xc0e50000)
3090 {
3091 invalid_tls_insn (input_bfd, input_section, rel);
3092 return FALSE;
3093 }
3094 /* LD->LE transition.
3095 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3096 insn0 = 0xc0040000;
3097 insn1 = 0x0000;
3098 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3099 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3100 }
3101 }
3102 continue;
3103
3104 default:
3105 break;
3106 }
3107
3108 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3109 because such sections are not SEC_ALLOC and thus ld.so will
3110 not process them. */
3111 if (unresolved_reloc
3112 && !((input_section->flags & SEC_DEBUGGING) != 0
3113 && h->def_dynamic)
3114 && _bfd_elf_section_offset (output_bfd, info, input_section,
3115 rel->r_offset) != (bfd_vma) -1)
3116 _bfd_error_handler
3117 /* xgettext:c-format */
3118 (_("%pB(%pA+%#" PRIx64 "): "
3119 "unresolvable %s relocation against symbol `%s'"),
3120 input_bfd,
3121 input_section,
3122 (uint64_t) rel->r_offset,
3123 howto->name,
3124 h->root.root.string);
3125
3126 do_relocation:
3127
3128 /* When applying a 24 bit reloc we need to start one byte
3129 earlier. Otherwise the 32 bit get/put bfd operations might
3130 access a byte after the actual section. */
3131 if (r_type == R_390_PC24DBL
3132 || r_type == R_390_PLT24DBL)
3133 rel->r_offset--;
3134
3135 if (r_type == R_390_20
3136 || r_type == R_390_GOT20
3137 || r_type == R_390_GOTPLT20
3138 || r_type == R_390_TLS_GOTIE20)
3139 {
3140 relocation += rel->r_addend;
3141 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3142 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3143 contents, rel->r_offset,
3144 relocation, 0);
3145 }
3146 else
3147 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3148 contents, rel->r_offset,
3149 relocation, rel->r_addend);
3150
3151 if (r != bfd_reloc_ok)
3152 {
3153 const char *name;
3154
3155 if (h != NULL)
3156 name = h->root.root.string;
3157 else
3158 {
3159 name = bfd_elf_string_from_elf_section (input_bfd,
3160 symtab_hdr->sh_link,
3161 sym->st_name);
3162 if (name == NULL)
3163 return FALSE;
3164 if (*name == '\0')
3165 name = bfd_section_name (input_bfd, sec);
3166 }
3167
3168 if (r == bfd_reloc_overflow)
3169 (*info->callbacks->reloc_overflow)
3170 (info, (h ? &h->root : NULL), name, howto->name,
3171 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3172 else
3173 {
3174 _bfd_error_handler
3175 /* xgettext:c-format */
3176 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3177 input_bfd, input_section,
3178 (uint64_t) rel->r_offset, name, (int) r);
3179 return FALSE;
3180 }
3181 }
3182 }
3183
3184 return TRUE;
3185 }
3186
3187 /* Generate the PLT slots together with the dynamic relocations needed
3188 for IFUNC symbols. */
3189
3190 static void
3191 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3192 struct bfd_link_info *info,
3193 struct elf_link_hash_entry *h,
3194 struct elf_s390_link_hash_table *htab,
3195 bfd_vma plt_offset,
3196 bfd_vma resolver_address)
3197 {
3198 bfd_vma plt_index;
3199 bfd_vma got_offset;
3200 Elf_Internal_Rela rela;
3201 bfd_byte *loc;
3202 asection *plt, *gotplt, *relplt;
3203
3204 if (htab->elf.iplt == NULL
3205 || htab->elf.igotplt == NULL
3206 || htab->elf.irelplt == NULL)
3207 abort ();
3208
3209 /* Index of the PLT slot within iplt section. */
3210 plt_index = plt_offset / PLT_ENTRY_SIZE;
3211 plt = htab->elf.iplt;
3212 /* Offset into the igot.plt section. */
3213 got_offset = plt_index * GOT_ENTRY_SIZE;
3214 gotplt = htab->elf.igotplt;
3215 relplt = htab->elf.irelplt;
3216
3217 /* Fill in the blueprint of a PLT. */
3218 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3219 PLT_ENTRY_SIZE);
3220
3221 /* Fixup the relative address to the GOT entry */
3222 bfd_put_32 (output_bfd,
3223 (gotplt->output_section->vma +
3224 gotplt->output_offset + got_offset
3225 - (plt->output_section->vma +
3226 plt->output_offset +
3227 plt_offset))/2,
3228 plt->contents + plt_offset + 2);
3229 /* Fixup the relative branch to PLT 0 */
3230 bfd_put_32 (output_bfd, - (plt->output_offset +
3231 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3232 plt->contents + plt_offset + 24);
3233 /* Fixup offset into .rela.plt section. */
3234 bfd_put_32 (output_bfd, relplt->output_offset +
3235 plt_index * sizeof (Elf64_External_Rela),
3236 plt->contents + plt_offset + 28);
3237
3238 /* Fill in the entry in the global offset table.
3239 Points to instruction after GOT offset. */
3240 bfd_put_64 (output_bfd,
3241 (plt->output_section->vma
3242 + plt->output_offset
3243 + plt_offset
3244 + 14),
3245 gotplt->contents + got_offset);
3246
3247 /* Fill in the entry in the .rela.plt section. */
3248 rela.r_offset = (gotplt->output_section->vma
3249 + gotplt->output_offset
3250 + got_offset);
3251
3252 if (!h
3253 || h->dynindx == -1
3254 || ((bfd_link_executable (info)
3255 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3256 && h->def_regular))
3257 {
3258 /* The symbol can be locally resolved. */
3259 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3260 rela.r_addend = resolver_address;
3261 }
3262 else
3263 {
3264 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3265 rela.r_addend = 0;
3266 }
3267
3268 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3269 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3270 }
3271
3272
3273 /* Finish up dynamic symbol handling. We set the contents of various
3274 dynamic sections here. */
3275
3276 static bfd_boolean
3277 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3278 struct bfd_link_info *info,
3279 struct elf_link_hash_entry *h,
3280 Elf_Internal_Sym *sym)
3281 {
3282 struct elf_s390_link_hash_table *htab;
3283 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3284
3285 htab = elf_s390_hash_table (info);
3286 if (htab == NULL)
3287 return FALSE;
3288
3289 if (h->plt.offset != (bfd_vma) -1)
3290 {
3291 bfd_vma plt_index;
3292 bfd_vma got_offset;
3293 Elf_Internal_Rela rela;
3294 bfd_byte *loc;
3295
3296 /* This symbol has an entry in the procedure linkage table. Set
3297 it up. */
3298 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3299 {
3300 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3301 htab, h->plt.offset,
3302 eh->ifunc_resolver_address +
3303 eh->ifunc_resolver_section->output_offset +
3304 eh->ifunc_resolver_section->output_section->vma);
3305
3306 /* Do not return yet. Handling of explicit GOT slots of
3307 IFUNC symbols is below. */
3308 }
3309 else
3310 {
3311 if (h->dynindx == -1
3312 || htab->elf.splt == NULL
3313 || htab->elf.sgotplt == NULL
3314 || htab->elf.srelplt == NULL)
3315 abort ();
3316
3317 /* Calc. index no.
3318 Current offset - size first entry / entry size. */
3319 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3320
3321 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3322 addr & GOT addr. */
3323 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3324
3325 /* Fill in the blueprint of a PLT. */
3326 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3327 PLT_ENTRY_SIZE);
3328
3329 /* Fixup the relative address to the GOT entry */
3330 bfd_put_32 (output_bfd,
3331 (htab->elf.sgotplt->output_section->vma +
3332 htab->elf.sgotplt->output_offset + got_offset
3333 - (htab->elf.splt->output_section->vma +
3334 htab->elf.splt->output_offset +
3335 h->plt.offset))/2,
3336 htab->elf.splt->contents + h->plt.offset + 2);
3337 /* Fixup the relative branch to PLT 0 */
3338 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3339 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3340 htab->elf.splt->contents + h->plt.offset + 24);
3341 /* Fixup offset into .rela.plt section. */
3342 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3343 htab->elf.splt->contents + h->plt.offset + 28);
3344
3345 /* Fill in the entry in the global offset table.
3346 Points to instruction after GOT offset. */
3347 bfd_put_64 (output_bfd,
3348 (htab->elf.splt->output_section->vma
3349 + htab->elf.splt->output_offset
3350 + h->plt.offset
3351 + 14),
3352 htab->elf.sgotplt->contents + got_offset);
3353
3354 /* Fill in the entry in the .rela.plt section. */
3355 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3356 + htab->elf.sgotplt->output_offset
3357 + got_offset);
3358 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3359 rela.r_addend = 0;
3360 loc = htab->elf.srelplt->contents + plt_index *
3361 sizeof (Elf64_External_Rela);
3362 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3363
3364 if (!h->def_regular)
3365 {
3366 /* Mark the symbol as undefined, rather than as defined in
3367 the .plt section. Leave the value alone. This is a clue
3368 for the dynamic linker, to make function pointer
3369 comparisons work between an application and shared
3370 library. */
3371 sym->st_shndx = SHN_UNDEF;
3372 }
3373 }
3374 }
3375
3376 if (h->got.offset != (bfd_vma) -1
3377 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3378 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3379 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3380 {
3381 Elf_Internal_Rela rela;
3382 bfd_byte *loc;
3383
3384 /* This symbol has an entry in the global offset table. Set it
3385 up. */
3386 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3387 abort ();
3388
3389 rela.r_offset = (htab->elf.sgot->output_section->vma
3390 + htab->elf.sgot->output_offset
3391 + (h->got.offset &~ (bfd_vma) 1));
3392
3393 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3394 {
3395 if (bfd_link_pic (info))
3396 {
3397 /* An explicit GOT slot usage needs GLOB_DAT. If the
3398 symbol references local the implicit got.iplt slot
3399 will be used and the IRELATIVE reloc has been created
3400 above. */
3401 goto do_glob_dat;
3402 }
3403 else
3404 {
3405 /* For non-shared objects explicit GOT slots must be
3406 filled with the PLT slot address for pointer
3407 equality reasons. */
3408 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3409 + htab->elf.iplt->output_offset
3410 + h->plt.offset),
3411 htab->elf.sgot->contents + h->got.offset);
3412 return TRUE;
3413 }
3414 }
3415 else if (bfd_link_pic (info)
3416 && SYMBOL_REFERENCES_LOCAL (info, h))
3417 {
3418 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3419 return TRUE;
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