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s390: Check UNDEFWEAK_NO_DYNAMIC_RELOC
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include "elf-s390.h"
29 #include <stdarg.h>
30
31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33 #define MINUS_ONE (((bfd_vma)0) - 1)
34
35 static bfd_reloc_status_type
36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
37 asection *, bfd *, char **);
38 static bfd_reloc_status_type
39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
40 asection *, bfd *, char **);
41
42 /* The relocation "howto" table. */
43 static reloc_howto_type elf_howto_table[] =
44 {
45 HOWTO (R_390_NONE, /* type */
46 0, /* rightshift */
47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
48 0, /* bitsize */
49 FALSE, /* pc_relative */
50 0, /* bitpos */
51 complain_overflow_dont, /* complain_on_overflow */
52 bfd_elf_generic_reloc, /* special_function */
53 "R_390_NONE", /* name */
54 FALSE, /* partial_inplace */
55 0, /* src_mask */
56 0, /* dst_mask */
57 FALSE), /* pcrel_offset */
58
59 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
75 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
79 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
81 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
83 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
85 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
87 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
99 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
101 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
103 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
105 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
107 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
109 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
111 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
113 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
115 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
123 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
125 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
138 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
140 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
149 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
151 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
154 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
165 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
169 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
173 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
175 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
181 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
183 };
184
185 /* GNU extension to record C++ vtable hierarchy. */
186 static reloc_howto_type elf64_s390_vtinherit_howto =
187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
188 static reloc_howto_type elf64_s390_vtentry_howto =
189 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
190
191 static reloc_howto_type *
192 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
193 bfd_reloc_code_real_type code)
194 {
195 switch (code)
196 {
197 case BFD_RELOC_NONE:
198 return &elf_howto_table[(int) R_390_NONE];
199 case BFD_RELOC_8:
200 return &elf_howto_table[(int) R_390_8];
201 case BFD_RELOC_390_12:
202 return &elf_howto_table[(int) R_390_12];
203 case BFD_RELOC_16:
204 return &elf_howto_table[(int) R_390_16];
205 case BFD_RELOC_32:
206 return &elf_howto_table[(int) R_390_32];
207 case BFD_RELOC_CTOR:
208 return &elf_howto_table[(int) R_390_32];
209 case BFD_RELOC_32_PCREL:
210 return &elf_howto_table[(int) R_390_PC32];
211 case BFD_RELOC_390_GOT12:
212 return &elf_howto_table[(int) R_390_GOT12];
213 case BFD_RELOC_32_GOT_PCREL:
214 return &elf_howto_table[(int) R_390_GOT32];
215 case BFD_RELOC_390_PLT32:
216 return &elf_howto_table[(int) R_390_PLT32];
217 case BFD_RELOC_390_COPY:
218 return &elf_howto_table[(int) R_390_COPY];
219 case BFD_RELOC_390_GLOB_DAT:
220 return &elf_howto_table[(int) R_390_GLOB_DAT];
221 case BFD_RELOC_390_JMP_SLOT:
222 return &elf_howto_table[(int) R_390_JMP_SLOT];
223 case BFD_RELOC_390_RELATIVE:
224 return &elf_howto_table[(int) R_390_RELATIVE];
225 case BFD_RELOC_32_GOTOFF:
226 return &elf_howto_table[(int) R_390_GOTOFF32];
227 case BFD_RELOC_390_GOTPC:
228 return &elf_howto_table[(int) R_390_GOTPC];
229 case BFD_RELOC_390_GOT16:
230 return &elf_howto_table[(int) R_390_GOT16];
231 case BFD_RELOC_16_PCREL:
232 return &elf_howto_table[(int) R_390_PC16];
233 case BFD_RELOC_390_PC12DBL:
234 return &elf_howto_table[(int) R_390_PC12DBL];
235 case BFD_RELOC_390_PLT12DBL:
236 return &elf_howto_table[(int) R_390_PLT12DBL];
237 case BFD_RELOC_390_PC16DBL:
238 return &elf_howto_table[(int) R_390_PC16DBL];
239 case BFD_RELOC_390_PLT16DBL:
240 return &elf_howto_table[(int) R_390_PLT16DBL];
241 case BFD_RELOC_390_PC24DBL:
242 return &elf_howto_table[(int) R_390_PC24DBL];
243 case BFD_RELOC_390_PLT24DBL:
244 return &elf_howto_table[(int) R_390_PLT24DBL];
245 case BFD_RELOC_390_PC32DBL:
246 return &elf_howto_table[(int) R_390_PC32DBL];
247 case BFD_RELOC_390_PLT32DBL:
248 return &elf_howto_table[(int) R_390_PLT32DBL];
249 case BFD_RELOC_390_GOTPCDBL:
250 return &elf_howto_table[(int) R_390_GOTPCDBL];
251 case BFD_RELOC_64:
252 return &elf_howto_table[(int) R_390_64];
253 case BFD_RELOC_64_PCREL:
254 return &elf_howto_table[(int) R_390_PC64];
255 case BFD_RELOC_390_GOT64:
256 return &elf_howto_table[(int) R_390_GOT64];
257 case BFD_RELOC_390_PLT64:
258 return &elf_howto_table[(int) R_390_PLT64];
259 case BFD_RELOC_390_GOTENT:
260 return &elf_howto_table[(int) R_390_GOTENT];
261 case BFD_RELOC_16_GOTOFF:
262 return &elf_howto_table[(int) R_390_GOTOFF16];
263 case BFD_RELOC_390_GOTOFF64:
264 return &elf_howto_table[(int) R_390_GOTOFF64];
265 case BFD_RELOC_390_GOTPLT12:
266 return &elf_howto_table[(int) R_390_GOTPLT12];
267 case BFD_RELOC_390_GOTPLT16:
268 return &elf_howto_table[(int) R_390_GOTPLT16];
269 case BFD_RELOC_390_GOTPLT32:
270 return &elf_howto_table[(int) R_390_GOTPLT32];
271 case BFD_RELOC_390_GOTPLT64:
272 return &elf_howto_table[(int) R_390_GOTPLT64];
273 case BFD_RELOC_390_GOTPLTENT:
274 return &elf_howto_table[(int) R_390_GOTPLTENT];
275 case BFD_RELOC_390_PLTOFF16:
276 return &elf_howto_table[(int) R_390_PLTOFF16];
277 case BFD_RELOC_390_PLTOFF32:
278 return &elf_howto_table[(int) R_390_PLTOFF32];
279 case BFD_RELOC_390_PLTOFF64:
280 return &elf_howto_table[(int) R_390_PLTOFF64];
281 case BFD_RELOC_390_TLS_LOAD:
282 return &elf_howto_table[(int) R_390_TLS_LOAD];
283 case BFD_RELOC_390_TLS_GDCALL:
284 return &elf_howto_table[(int) R_390_TLS_GDCALL];
285 case BFD_RELOC_390_TLS_LDCALL:
286 return &elf_howto_table[(int) R_390_TLS_LDCALL];
287 case BFD_RELOC_390_TLS_GD64:
288 return &elf_howto_table[(int) R_390_TLS_GD64];
289 case BFD_RELOC_390_TLS_GOTIE12:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
291 case BFD_RELOC_390_TLS_GOTIE64:
292 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
293 case BFD_RELOC_390_TLS_LDM64:
294 return &elf_howto_table[(int) R_390_TLS_LDM64];
295 case BFD_RELOC_390_TLS_IE64:
296 return &elf_howto_table[(int) R_390_TLS_IE64];
297 case BFD_RELOC_390_TLS_IEENT:
298 return &elf_howto_table[(int) R_390_TLS_IEENT];
299 case BFD_RELOC_390_TLS_LE64:
300 return &elf_howto_table[(int) R_390_TLS_LE64];
301 case BFD_RELOC_390_TLS_LDO64:
302 return &elf_howto_table[(int) R_390_TLS_LDO64];
303 case BFD_RELOC_390_TLS_DTPMOD:
304 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
305 case BFD_RELOC_390_TLS_DTPOFF:
306 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
307 case BFD_RELOC_390_TLS_TPOFF:
308 return &elf_howto_table[(int) R_390_TLS_TPOFF];
309 case BFD_RELOC_390_20:
310 return &elf_howto_table[(int) R_390_20];
311 case BFD_RELOC_390_GOT20:
312 return &elf_howto_table[(int) R_390_GOT20];
313 case BFD_RELOC_390_GOTPLT20:
314 return &elf_howto_table[(int) R_390_GOTPLT20];
315 case BFD_RELOC_390_TLS_GOTIE20:
316 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
317 case BFD_RELOC_390_IRELATIVE:
318 return &elf_howto_table[(int) R_390_IRELATIVE];
319 case BFD_RELOC_VTABLE_INHERIT:
320 return &elf64_s390_vtinherit_howto;
321 case BFD_RELOC_VTABLE_ENTRY:
322 return &elf64_s390_vtentry_howto;
323 default:
324 break;
325 }
326 return 0;
327 }
328
329 static reloc_howto_type *
330 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
331 const char *r_name)
332 {
333 unsigned int i;
334
335 for (i = 0;
336 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
337 i++)
338 if (elf_howto_table[i].name != NULL
339 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
340 return &elf_howto_table[i];
341
342 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
343 return &elf64_s390_vtinherit_howto;
344 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
345 return &elf64_s390_vtentry_howto;
346
347 return NULL;
348 }
349
350 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
351 and elf64-s390.c has its own copy. */
352
353 static void
354 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
355 arelent *cache_ptr,
356 Elf_Internal_Rela *dst)
357 {
358 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
359 switch (r_type)
360 {
361 case R_390_GNU_VTINHERIT:
362 cache_ptr->howto = &elf64_s390_vtinherit_howto;
363 break;
364
365 case R_390_GNU_VTENTRY:
366 cache_ptr->howto = &elf64_s390_vtentry_howto;
367 break;
368
369 default:
370 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
371 {
372 /* xgettext:c-format */
373 _bfd_error_handler (_("%B: invalid relocation type %d"),
374 abfd, (int) r_type);
375 r_type = R_390_NONE;
376 }
377 cache_ptr->howto = &elf_howto_table[r_type];
378 }
379 }
380
381 /* A relocation function which doesn't do anything. */
382 static bfd_reloc_status_type
383 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
384 arelent *reloc_entry,
385 asymbol *symbol ATTRIBUTE_UNUSED,
386 void * data ATTRIBUTE_UNUSED,
387 asection *input_section,
388 bfd *output_bfd,
389 char **error_message ATTRIBUTE_UNUSED)
390 {
391 if (output_bfd)
392 reloc_entry->address += input_section->output_offset;
393 return bfd_reloc_ok;
394 }
395
396 /* Handle the large displacement relocs. */
397 static bfd_reloc_status_type
398 s390_elf_ldisp_reloc (bfd *abfd,
399 arelent *reloc_entry,
400 asymbol *symbol,
401 void * data,
402 asection *input_section,
403 bfd *output_bfd,
404 char **error_message ATTRIBUTE_UNUSED)
405 {
406 reloc_howto_type *howto = reloc_entry->howto;
407 bfd_vma relocation;
408 bfd_vma insn;
409
410 if (output_bfd != (bfd *) NULL
411 && (symbol->flags & BSF_SECTION_SYM) == 0
412 && (! howto->partial_inplace
413 || reloc_entry->addend == 0))
414 {
415 reloc_entry->address += input_section->output_offset;
416 return bfd_reloc_ok;
417 }
418 if (output_bfd != NULL)
419 return bfd_reloc_continue;
420
421 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
422 return bfd_reloc_outofrange;
423
424 relocation = (symbol->value
425 + symbol->section->output_section->vma
426 + symbol->section->output_offset);
427 relocation += reloc_entry->addend;
428 if (howto->pc_relative)
429 {
430 relocation -= (input_section->output_section->vma
431 + input_section->output_offset);
432 relocation -= reloc_entry->address;
433 }
434
435 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
436 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
437 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
438
439 if ((bfd_signed_vma) relocation < - 0x80000
440 || (bfd_signed_vma) relocation > 0x7ffff)
441 return bfd_reloc_overflow;
442 else
443 return bfd_reloc_ok;
444 }
445
446 static bfd_boolean
447 elf_s390_is_local_label_name (bfd *abfd, const char *name)
448 {
449 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
450 return TRUE;
451
452 return _bfd_elf_is_local_label_name (abfd, name);
453 }
454
455 /* Functions for the 390 ELF linker. */
456
457 /* The name of the dynamic interpreter. This is put in the .interp
458 section. */
459
460 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
461
462 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
463 copying dynamic variables from a shared lib into an app's dynbss
464 section, and instead use a dynamic relocation to point into the
465 shared lib. */
466 #define ELIMINATE_COPY_RELOCS 1
467
468 /* The size in bytes of the first entry in the procedure linkage table. */
469 #define PLT_FIRST_ENTRY_SIZE 32
470 /* The size in bytes of an entry in the procedure linkage table. */
471 #define PLT_ENTRY_SIZE 32
472
473 #define GOT_ENTRY_SIZE 8
474
475 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
476
477 /* The first three entries in a procedure linkage table are reserved,
478 and the initial contents are unimportant (we zero them out).
479 Subsequent entries look like this. See the SVR4 ABI 386
480 supplement to see how this works. */
481
482 /* For the s390, simple addr offset can only be 0 - 4096.
483 To use the full 16777216 TB address space, several instructions
484 are needed to load an address in a register and execute
485 a branch( or just saving the address)
486
487 Furthermore, only r 0 and 1 are free to use!!! */
488
489 /* The first 3 words in the GOT are then reserved.
490 Word 0 is the address of the dynamic table.
491 Word 1 is a pointer to a structure describing the object
492 Word 2 is used to point to the loader entry address.
493
494 The code for PLT entries looks like this:
495
496 The GOT holds the address in the PLT to be executed.
497 The loader then gets:
498 48(15) = Pointer to the structure describing the object.
499 56(15) = Offset in symbol table
500 The loader must then find the module where the function is
501 and insert the address in the GOT.
502
503 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
504 LG 1,0(1) # 6 bytes Load address from GOT in r1
505 BCR 15,1 # 2 bytes Jump to address
506 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
507 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
508 BRCL 15,-x # 6 bytes Jump to start of PLT
509 .long ? # 4 bytes offset into .rela.plt
510
511 Total = 32 bytes per PLT entry
512 Fixup at offset 2: relative address to GOT entry
513 Fixup at offset 22: relative branch to PLT0
514 Fixup at offset 28: 32 bit offset into .rela.plt
515
516 A 32 bit offset into the symbol table is enough. It allows for
517 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
518 object (the main program, any shared library) is limited to 4GB in
519 size. Having a .rela.plt of 2GB would already make the .plt
520 section bigger than 8GB. */
521
522 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
523 {
524 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
525 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
526 0x07, 0xf1, /* br %r1 */
527 0x0d, 0x10, /* basr %r1,%r0 */
528 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
529 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
530 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
531 };
532
533 /* The first PLT entry pushes the offset into the symbol table
534 from R1 onto the stack at 56(15) and the loader object info
535 at 48(15), loads the loader address in R1 and jumps to it. */
536
537 /* The first entry in the PLT:
538
539 PLT0:
540 STG 1,56(15) # r1 contains the offset into the symbol table
541 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
542 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
543 LG 1,16(1) # get entry address of loader
544 BCR 15,1 # jump to loader
545
546 Fixup at offset 8: relative address to start of GOT. */
547
548 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
549 {
550 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
551 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
552 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
553 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
554 0x07, 0xf1, /* br %r1 */
555 0x07, 0x00, /* nopr %r0 */
556 0x07, 0x00, /* nopr %r0 */
557 0x07, 0x00 /* nopr %r0 */
558 };
559
560
561 /* s390 ELF linker hash entry. */
562
563 struct elf_s390_link_hash_entry
564 {
565 struct elf_link_hash_entry elf;
566
567 /* Track dynamic relocs copied for this symbol. */
568 struct elf_dyn_relocs *dyn_relocs;
569
570 /* Number of GOTPLT references for a function. */
571 bfd_signed_vma gotplt_refcount;
572
573 #define GOT_UNKNOWN 0
574 #define GOT_NORMAL 1
575 #define GOT_TLS_GD 2
576 #define GOT_TLS_IE 3
577 #define GOT_TLS_IE_NLT 3
578 unsigned char tls_type;
579
580 /* For pointer equality reasons we might need to change the symbol
581 type from STT_GNU_IFUNC to STT_FUNC together with its value and
582 section entry. So after alloc_dynrelocs only these values should
583 be used. In order to check whether a symbol is IFUNC use
584 s390_is_ifunc_symbol_p. */
585 bfd_vma ifunc_resolver_address;
586 asection *ifunc_resolver_section;
587 };
588
589 #define elf_s390_hash_entry(ent) \
590 ((struct elf_s390_link_hash_entry *)(ent))
591
592 /* This structure represents an entry in the local PLT list needed for
593 local IFUNC symbols. */
594 struct plt_entry
595 {
596 /* The section of the local symbol.
597 Set in relocate_section and used in finish_dynamic_sections. */
598 asection *sec;
599
600 union
601 {
602 bfd_signed_vma refcount;
603 bfd_vma offset;
604 } plt;
605 };
606
607 /* NOTE: Keep this structure in sync with
608 the one declared in elf32-s390.c. */
609 struct elf_s390_obj_tdata
610 {
611 struct elf_obj_tdata root;
612
613 /* A local PLT is needed for ifunc symbols. */
614 struct plt_entry *local_plt;
615
616 /* TLS type for each local got entry. */
617 char *local_got_tls_type;
618 };
619
620 #define elf_s390_tdata(abfd) \
621 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
622
623 #define elf_s390_local_plt(abfd) \
624 (elf_s390_tdata (abfd)->local_plt)
625
626 #define elf_s390_local_got_tls_type(abfd) \
627 (elf_s390_tdata (abfd)->local_got_tls_type)
628
629 #define is_s390_elf(bfd) \
630 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
631 && elf_tdata (bfd) != NULL \
632 && elf_object_id (bfd) == S390_ELF_DATA)
633
634 static bfd_boolean
635 elf_s390_mkobject (bfd *abfd)
636 {
637 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
638 S390_ELF_DATA);
639 }
640
641 static bfd_boolean
642 elf_s390_object_p (bfd *abfd)
643 {
644 /* Set the right machine number for an s390 elf32 file. */
645 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
646 }
647
648 /* s390 ELF linker hash table. */
649
650 struct elf_s390_link_hash_table
651 {
652 struct elf_link_hash_table elf;
653
654 /* Short-cuts to get to dynamic linker sections. */
655 asection *irelifunc;
656
657 union {
658 bfd_signed_vma refcount;
659 bfd_vma offset;
660 } tls_ldm_got;
661
662 /* Small local sym cache. */
663 struct sym_cache sym_cache;
664
665 /* Options passed from the linker. */
666 struct s390_elf_params *params;
667 };
668
669 /* Get the s390 ELF linker hash table from a link_info structure. */
670
671 #define elf_s390_hash_table(p) \
672 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
673 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
674
675 #define ELF64 1
676 #include "elf-s390-common.c"
677
678 /* Create an entry in an s390 ELF linker hash table. */
679
680 static struct bfd_hash_entry *
681 link_hash_newfunc (struct bfd_hash_entry *entry,
682 struct bfd_hash_table *table,
683 const char *string)
684 {
685 /* Allocate the structure if it has not already been allocated by a
686 subclass. */
687 if (entry == NULL)
688 {
689 entry = bfd_hash_allocate (table,
690 sizeof (struct elf_s390_link_hash_entry));
691 if (entry == NULL)
692 return entry;
693 }
694
695 /* Call the allocation method of the superclass. */
696 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
697 if (entry != NULL)
698 {
699 struct elf_s390_link_hash_entry *eh;
700
701 eh = (struct elf_s390_link_hash_entry *) entry;
702 eh->dyn_relocs = NULL;
703 eh->gotplt_refcount = 0;
704 eh->tls_type = GOT_UNKNOWN;
705 eh->ifunc_resolver_address = 0;
706 eh->ifunc_resolver_section = NULL;
707 }
708
709 return entry;
710 }
711
712 /* Create an s390 ELF linker hash table. */
713
714 static struct bfd_link_hash_table *
715 elf_s390_link_hash_table_create (bfd *abfd)
716 {
717 struct elf_s390_link_hash_table *ret;
718 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
719
720 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
721 if (ret == NULL)
722 return NULL;
723
724 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
725 sizeof (struct elf_s390_link_hash_entry),
726 S390_ELF_DATA))
727 {
728 free (ret);
729 return NULL;
730 }
731
732 return &ret->elf.root;
733 }
734
735 /* Copy the extra info we tack onto an elf_link_hash_entry. */
736
737 static void
738 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
739 struct elf_link_hash_entry *dir,
740 struct elf_link_hash_entry *ind)
741 {
742 struct elf_s390_link_hash_entry *edir, *eind;
743
744 edir = (struct elf_s390_link_hash_entry *) dir;
745 eind = (struct elf_s390_link_hash_entry *) ind;
746
747 if (eind->dyn_relocs != NULL)
748 {
749 if (edir->dyn_relocs != NULL)
750 {
751 struct elf_dyn_relocs **pp;
752 struct elf_dyn_relocs *p;
753
754 /* Add reloc counts against the indirect sym to the direct sym
755 list. Merge any entries against the same section. */
756 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
757 {
758 struct elf_dyn_relocs *q;
759
760 for (q = edir->dyn_relocs; q != NULL; q = q->next)
761 if (q->sec == p->sec)
762 {
763 q->pc_count += p->pc_count;
764 q->count += p->count;
765 *pp = p->next;
766 break;
767 }
768 if (q == NULL)
769 pp = &p->next;
770 }
771 *pp = edir->dyn_relocs;
772 }
773
774 edir->dyn_relocs = eind->dyn_relocs;
775 eind->dyn_relocs = NULL;
776 }
777
778 if (ind->root.type == bfd_link_hash_indirect
779 && dir->got.refcount <= 0)
780 {
781 edir->tls_type = eind->tls_type;
782 eind->tls_type = GOT_UNKNOWN;
783 }
784
785 if (ELIMINATE_COPY_RELOCS
786 && ind->root.type != bfd_link_hash_indirect
787 && dir->dynamic_adjusted)
788 {
789 /* If called to transfer flags for a weakdef during processing
790 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
791 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
792 if (dir->versioned != versioned_hidden)
793 dir->ref_dynamic |= ind->ref_dynamic;
794 dir->ref_regular |= ind->ref_regular;
795 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
796 dir->needs_plt |= ind->needs_plt;
797 }
798 else
799 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
800 }
801
802 static int
803 elf_s390_tls_transition (struct bfd_link_info *info,
804 int r_type,
805 int is_local)
806 {
807 if (bfd_link_pic (info))
808 return r_type;
809
810 switch (r_type)
811 {
812 case R_390_TLS_GD64:
813 case R_390_TLS_IE64:
814 if (is_local)
815 return R_390_TLS_LE64;
816 return R_390_TLS_IE64;
817 case R_390_TLS_GOTIE64:
818 if (is_local)
819 return R_390_TLS_LE64;
820 return R_390_TLS_GOTIE64;
821 case R_390_TLS_LDM64:
822 return R_390_TLS_LE64;
823 }
824
825 return r_type;
826 }
827
828 /* Look through the relocs for a section during the first phase, and
829 allocate space in the global offset table or procedure linkage
830 table. */
831
832 static bfd_boolean
833 elf_s390_check_relocs (bfd *abfd,
834 struct bfd_link_info *info,
835 asection *sec,
836 const Elf_Internal_Rela *relocs)
837 {
838 struct elf_s390_link_hash_table *htab;
839 Elf_Internal_Shdr *symtab_hdr;
840 struct elf_link_hash_entry **sym_hashes;
841 const Elf_Internal_Rela *rel;
842 const Elf_Internal_Rela *rel_end;
843 asection *sreloc;
844 bfd_signed_vma *local_got_refcounts;
845 int tls_type, old_tls_type;
846
847 if (bfd_link_relocatable (info))
848 return TRUE;
849
850 BFD_ASSERT (is_s390_elf (abfd));
851
852 htab = elf_s390_hash_table (info);
853 if (htab == NULL)
854 return FALSE;
855
856 symtab_hdr = &elf_symtab_hdr (abfd);
857 sym_hashes = elf_sym_hashes (abfd);
858 local_got_refcounts = elf_local_got_refcounts (abfd);
859
860 sreloc = NULL;
861
862 rel_end = relocs + sec->reloc_count;
863 for (rel = relocs; rel < rel_end; rel++)
864 {
865 unsigned int r_type;
866 unsigned int r_symndx;
867 struct elf_link_hash_entry *h;
868 Elf_Internal_Sym *isym;
869
870 r_symndx = ELF64_R_SYM (rel->r_info);
871
872 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
873 {
874 /* xgettext:c-format */
875 _bfd_error_handler (_("%B: bad symbol index: %d"),
876 abfd, r_symndx);
877 return FALSE;
878 }
879
880 if (r_symndx < symtab_hdr->sh_info)
881 {
882 /* A local symbol. */
883 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
884 abfd, r_symndx);
885 if (isym == NULL)
886 return FALSE;
887
888 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
889 {
890 struct plt_entry *plt;
891
892 if (htab->elf.dynobj == NULL)
893 htab->elf.dynobj = abfd;
894
895 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
896 return FALSE;
897
898 if (local_got_refcounts == NULL)
899 {
900 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
901 return FALSE;
902 local_got_refcounts = elf_local_got_refcounts (abfd);
903 }
904 plt = elf_s390_local_plt (abfd);
905 plt[r_symndx].plt.refcount++;
906 }
907 h = NULL;
908 }
909 else
910 {
911 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
912 while (h->root.type == bfd_link_hash_indirect
913 || h->root.type == bfd_link_hash_warning)
914 h = (struct elf_link_hash_entry *) h->root.u.i.link;
915
916 /* PR15323, ref flags aren't set for references in the same
917 object. */
918 h->root.non_ir_ref_regular = 1;
919 }
920
921 /* Create got section and local_got_refcounts array if they
922 are needed. */
923 r_type = elf_s390_tls_transition (info,
924 ELF64_R_TYPE (rel->r_info),
925 h == NULL);
926 switch (r_type)
927 {
928 case R_390_GOT12:
929 case R_390_GOT16:
930 case R_390_GOT20:
931 case R_390_GOT32:
932 case R_390_GOT64:
933 case R_390_GOTENT:
934 case R_390_GOTPLT12:
935 case R_390_GOTPLT16:
936 case R_390_GOTPLT20:
937 case R_390_GOTPLT32:
938 case R_390_GOTPLT64:
939 case R_390_GOTPLTENT:
940 case R_390_TLS_GD64:
941 case R_390_TLS_GOTIE12:
942 case R_390_TLS_GOTIE20:
943 case R_390_TLS_GOTIE64:
944 case R_390_TLS_IEENT:
945 case R_390_TLS_IE64:
946 case R_390_TLS_LDM64:
947 if (h == NULL
948 && local_got_refcounts == NULL)
949 {
950 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
951 return FALSE;
952 local_got_refcounts = elf_local_got_refcounts (abfd);
953 }
954
955 /* Fall through. */
956 case R_390_GOTOFF16:
957 case R_390_GOTOFF32:
958 case R_390_GOTOFF64:
959 case R_390_GOTPC:
960 case R_390_GOTPCDBL:
961 if (htab->elf.sgot == NULL)
962 {
963 if (htab->elf.dynobj == NULL)
964 htab->elf.dynobj = abfd;
965 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
966 return FALSE;
967 }
968 }
969
970 if (h != NULL)
971 {
972 if (htab->elf.dynobj == NULL)
973 htab->elf.dynobj = abfd;
974 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
975 return FALSE;
976
977 /* Make sure an IFUNC symbol defined in a non-shared object
978 always gets a PLT slot. */
979 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
980 {
981 /* The symbol is called by the dynamic loader in order
982 to resolve the relocation. So it is in fact also
983 referenced. */
984 h->ref_regular = 1;
985 h->needs_plt = 1;
986 }
987 }
988
989 switch (r_type)
990 {
991 case R_390_GOTPC:
992 case R_390_GOTPCDBL:
993 /* These relocs do not need a GOT slot. They just load the
994 GOT pointer itself or address something else relative to
995 the GOT. Since the GOT pointer has been set up above we
996 are done. */
997 break;
998 case R_390_GOTOFF16:
999 case R_390_GOTOFF32:
1000 case R_390_GOTOFF64:
1001 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1002 break;
1003 /* Fall through. */
1004
1005 case R_390_PLT12DBL:
1006 case R_390_PLT16DBL:
1007 case R_390_PLT24DBL:
1008 case R_390_PLT32:
1009 case R_390_PLT32DBL:
1010 case R_390_PLT64:
1011 case R_390_PLTOFF16:
1012 case R_390_PLTOFF32:
1013 case R_390_PLTOFF64:
1014 /* This symbol requires a procedure linkage table entry. We
1015 actually build the entry in adjust_dynamic_symbol,
1016 because this might be a case of linking PIC code which is
1017 never referenced by a dynamic object, in which case we
1018 don't need to generate a procedure linkage table entry
1019 after all. */
1020
1021 /* If this is a local symbol, we resolve it directly without
1022 creating a procedure linkage table entry. */
1023 if (h != NULL)
1024 {
1025 h->needs_plt = 1;
1026 h->plt.refcount += 1;
1027 }
1028 break;
1029
1030 case R_390_GOTPLT12:
1031 case R_390_GOTPLT16:
1032 case R_390_GOTPLT20:
1033 case R_390_GOTPLT32:
1034 case R_390_GOTPLT64:
1035 case R_390_GOTPLTENT:
1036 /* This symbol requires either a procedure linkage table entry
1037 or an entry in the local got. We actually build the entry
1038 in adjust_dynamic_symbol because whether this is really a
1039 global reference can change and with it the fact if we have
1040 to create a plt entry or a local got entry. To be able to
1041 make a once global symbol a local one we have to keep track
1042 of the number of gotplt references that exist for this
1043 symbol. */
1044 if (h != NULL)
1045 {
1046 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1047 h->needs_plt = 1;
1048 h->plt.refcount += 1;
1049 }
1050 else
1051 local_got_refcounts[r_symndx] += 1;
1052 break;
1053
1054 case R_390_TLS_LDM64:
1055 htab->tls_ldm_got.refcount += 1;
1056 break;
1057
1058 case R_390_TLS_IE64:
1059 case R_390_TLS_GOTIE12:
1060 case R_390_TLS_GOTIE20:
1061 case R_390_TLS_GOTIE64:
1062 case R_390_TLS_IEENT:
1063 if (bfd_link_pic (info))
1064 info->flags |= DF_STATIC_TLS;
1065 /* Fall through */
1066
1067 case R_390_GOT12:
1068 case R_390_GOT16:
1069 case R_390_GOT20:
1070 case R_390_GOT32:
1071 case R_390_GOT64:
1072 case R_390_GOTENT:
1073 case R_390_TLS_GD64:
1074 /* This symbol requires a global offset table entry. */
1075 switch (r_type)
1076 {
1077 default:
1078 case R_390_GOT12:
1079 case R_390_GOT16:
1080 case R_390_GOT20:
1081 case R_390_GOT32:
1082 case R_390_GOTENT:
1083 tls_type = GOT_NORMAL;
1084 break;
1085 case R_390_TLS_GD64:
1086 tls_type = GOT_TLS_GD;
1087 break;
1088 case R_390_TLS_IE64:
1089 case R_390_TLS_GOTIE64:
1090 tls_type = GOT_TLS_IE;
1091 break;
1092 case R_390_TLS_GOTIE12:
1093 case R_390_TLS_GOTIE20:
1094 case R_390_TLS_IEENT:
1095 tls_type = GOT_TLS_IE_NLT;
1096 break;
1097 }
1098
1099 if (h != NULL)
1100 {
1101 h->got.refcount += 1;
1102 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1103 }
1104 else
1105 {
1106 local_got_refcounts[r_symndx] += 1;
1107 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1108 }
1109 /* If a TLS symbol is accessed using IE at least once,
1110 there is no point to use dynamic model for it. */
1111 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1112 {
1113 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1114 {
1115 _bfd_error_handler
1116 /* xgettext:c-format */
1117 (_("%B: `%s' accessed both as normal and thread local symbol"),
1118 abfd, h->root.root.string);
1119 return FALSE;
1120 }
1121 if (old_tls_type > tls_type)
1122 tls_type = old_tls_type;
1123 }
1124
1125 if (old_tls_type != tls_type)
1126 {
1127 if (h != NULL)
1128 elf_s390_hash_entry (h)->tls_type = tls_type;
1129 else
1130 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1131 }
1132
1133 if (r_type != R_390_TLS_IE64)
1134 break;
1135 /* Fall through */
1136
1137 case R_390_TLS_LE64:
1138 /* For static linking and executables this reloc will be
1139 calculated at linktime otherwise a TLS_TPOFF runtime
1140 reloc will be generated. */
1141 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1142 break;
1143
1144 if (!bfd_link_pic (info))
1145 break;
1146 info->flags |= DF_STATIC_TLS;
1147 /* Fall through */
1148
1149 case R_390_8:
1150 case R_390_16:
1151 case R_390_32:
1152 case R_390_64:
1153 case R_390_PC12DBL:
1154 case R_390_PC16:
1155 case R_390_PC16DBL:
1156 case R_390_PC24DBL:
1157 case R_390_PC32:
1158 case R_390_PC32DBL:
1159 case R_390_PC64:
1160 if (h != NULL && bfd_link_executable (info))
1161 {
1162 /* If this reloc is in a read-only section, we might
1163 need a copy reloc. We can't check reliably at this
1164 stage whether the section is read-only, as input
1165 sections have not yet been mapped to output sections.
1166 Tentatively set the flag for now, and correct in
1167 adjust_dynamic_symbol. */
1168 h->non_got_ref = 1;
1169
1170 if (!bfd_link_pic (info))
1171 {
1172 /* We may need a .plt entry if the function this reloc
1173 refers to is in a shared lib. */
1174 h->plt.refcount += 1;
1175 }
1176 }
1177
1178 /* If we are creating a shared library, and this is a reloc
1179 against a global symbol, or a non PC relative reloc
1180 against a local symbol, then we need to copy the reloc
1181 into the shared library. However, if we are linking with
1182 -Bsymbolic, we do not need to copy a reloc against a
1183 global symbol which is defined in an object we are
1184 including in the link (i.e., DEF_REGULAR is set). At
1185 this point we have not seen all the input files, so it is
1186 possible that DEF_REGULAR is not set now but will be set
1187 later (it is never cleared). In case of a weak definition,
1188 DEF_REGULAR may be cleared later by a strong definition in
1189 a shared library. We account for that possibility below by
1190 storing information in the relocs_copied field of the hash
1191 table entry. A similar situation occurs when creating
1192 shared libraries and symbol visibility changes render the
1193 symbol local.
1194
1195 If on the other hand, we are creating an executable, we
1196 may need to keep relocations for symbols satisfied by a
1197 dynamic library if we manage to avoid copy relocs for the
1198 symbol. */
1199 if ((bfd_link_pic (info)
1200 && (sec->flags & SEC_ALLOC) != 0
1201 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1202 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1203 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1204 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1207 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1208 || (h != NULL
1209 && (! SYMBOLIC_BIND (info, h)
1210 || h->root.type == bfd_link_hash_defweak
1211 || !h->def_regular))))
1212 || (ELIMINATE_COPY_RELOCS
1213 && !bfd_link_pic (info)
1214 && (sec->flags & SEC_ALLOC) != 0
1215 && h != NULL
1216 && (h->root.type == bfd_link_hash_defweak
1217 || !h->def_regular)))
1218 {
1219 struct elf_dyn_relocs *p;
1220 struct elf_dyn_relocs **head;
1221
1222 /* We must copy these reloc types into the output file.
1223 Create a reloc section in dynobj and make room for
1224 this reloc. */
1225 if (sreloc == NULL)
1226 {
1227 if (htab->elf.dynobj == NULL)
1228 htab->elf.dynobj = abfd;
1229
1230 sreloc = _bfd_elf_make_dynamic_reloc_section
1231 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1232
1233 if (sreloc == NULL)
1234 return FALSE;
1235 }
1236
1237 /* If this is a global symbol, we count the number of
1238 relocations we need for this symbol. */
1239 if (h != NULL)
1240 {
1241 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1242 }
1243 else
1244 {
1245 /* Track dynamic relocs needed for local syms too.
1246 We really need local syms available to do this
1247 easily. Oh well. */
1248 asection *s;
1249 void *vpp;
1250
1251 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1252 abfd, r_symndx);
1253 if (isym == NULL)
1254 return FALSE;
1255
1256 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1257 if (s == NULL)
1258 s = sec;
1259
1260 vpp = &elf_section_data (s)->local_dynrel;
1261 head = (struct elf_dyn_relocs **) vpp;
1262 }
1263
1264 p = *head;
1265 if (p == NULL || p->sec != sec)
1266 {
1267 bfd_size_type amt = sizeof *p;
1268 p = ((struct elf_dyn_relocs *)
1269 bfd_alloc (htab->elf.dynobj, amt));
1270 if (p == NULL)
1271 return FALSE;
1272 p->next = *head;
1273 *head = p;
1274 p->sec = sec;
1275 p->count = 0;
1276 p->pc_count = 0;
1277 }
1278
1279 p->count += 1;
1280 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1281 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1282 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1283 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1284 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1285 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1286 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1287 p->pc_count += 1;
1288 }
1289 break;
1290
1291 /* This relocation describes the C++ object vtable hierarchy.
1292 Reconstruct it for later use during GC. */
1293 case R_390_GNU_VTINHERIT:
1294 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1295 return FALSE;
1296 break;
1297
1298 /* This relocation describes which C++ vtable entries are actually
1299 used. Record for later use during GC. */
1300 case R_390_GNU_VTENTRY:
1301 BFD_ASSERT (h != NULL);
1302 if (h != NULL
1303 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1304 return FALSE;
1305 break;
1306
1307 default:
1308 break;
1309 }
1310 }
1311
1312 return TRUE;
1313 }
1314
1315 /* Return the section that should be marked against GC for a given
1316 relocation. */
1317
1318 static asection *
1319 elf_s390_gc_mark_hook (asection *sec,
1320 struct bfd_link_info *info,
1321 Elf_Internal_Rela *rel,
1322 struct elf_link_hash_entry *h,
1323 Elf_Internal_Sym *sym)
1324 {
1325 if (h != NULL)
1326 switch (ELF64_R_TYPE (rel->r_info))
1327 {
1328 case R_390_GNU_VTINHERIT:
1329 case R_390_GNU_VTENTRY:
1330 return NULL;
1331 }
1332
1333 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1334 }
1335
1336 /* Update the got entry reference counts for the section being removed. */
1337
1338 static bfd_boolean
1339 elf_s390_gc_sweep_hook (bfd *abfd,
1340 struct bfd_link_info *info,
1341 asection *sec,
1342 const Elf_Internal_Rela *relocs)
1343 {
1344 struct elf_s390_link_hash_table *htab;
1345 Elf_Internal_Shdr *symtab_hdr;
1346 struct elf_link_hash_entry **sym_hashes;
1347 bfd_signed_vma *local_got_refcounts;
1348 const Elf_Internal_Rela *rel, *relend;
1349
1350 if (bfd_link_relocatable (info))
1351 return TRUE;
1352
1353 htab = elf_s390_hash_table (info);
1354 if (htab == NULL)
1355 return FALSE;
1356
1357 elf_section_data (sec)->local_dynrel = NULL;
1358
1359 symtab_hdr = &elf_symtab_hdr (abfd);
1360 sym_hashes = elf_sym_hashes (abfd);
1361 local_got_refcounts = elf_local_got_refcounts (abfd);
1362
1363 relend = relocs + sec->reloc_count;
1364 for (rel = relocs; rel < relend; rel++)
1365 {
1366 unsigned long r_symndx;
1367 unsigned int r_type;
1368 struct elf_link_hash_entry *h = NULL;
1369
1370 r_symndx = ELF64_R_SYM (rel->r_info);
1371 if (r_symndx >= symtab_hdr->sh_info)
1372 {
1373 struct elf_s390_link_hash_entry *eh;
1374 struct elf_dyn_relocs **pp;
1375 struct elf_dyn_relocs *p;
1376
1377 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1378 while (h->root.type == bfd_link_hash_indirect
1379 || h->root.type == bfd_link_hash_warning)
1380 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1381 eh = (struct elf_s390_link_hash_entry *) h;
1382
1383 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1384 if (p->sec == sec)
1385 {
1386 /* Everything must go for SEC. */
1387 *pp = p->next;
1388 break;
1389 }
1390 }
1391 else
1392 {
1393 Elf_Internal_Sym *isym;
1394
1395 /* A local symbol. */
1396 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1397 abfd, r_symndx);
1398 if (isym == NULL)
1399 return FALSE;
1400
1401 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1402 {
1403 struct plt_entry *plt = elf_s390_local_plt (abfd);
1404 if (plt[r_symndx].plt.refcount > 0)
1405 plt[r_symndx].plt.refcount--;
1406 }
1407 }
1408
1409 r_type = ELF64_R_TYPE (rel->r_info);
1410 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1411 switch (r_type)
1412 {
1413 case R_390_TLS_LDM64:
1414 if (htab->tls_ldm_got.refcount > 0)
1415 htab->tls_ldm_got.refcount -= 1;
1416 break;
1417 case R_390_GOTOFF16:
1418 case R_390_GOTOFF32:
1419 case R_390_GOTOFF64:
1420 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1421 {
1422 h->plt.refcount--;
1423 break;
1424 }
1425
1426 case R_390_GOTPC:
1427 case R_390_GOTPCDBL:
1428 break;
1429
1430 case R_390_TLS_GD64:
1431 case R_390_TLS_IE64:
1432 case R_390_TLS_GOTIE12:
1433 case R_390_TLS_GOTIE20:
1434 case R_390_TLS_GOTIE64:
1435 case R_390_TLS_IEENT:
1436 case R_390_GOT12:
1437 case R_390_GOT16:
1438 case R_390_GOT20:
1439 case R_390_GOT32:
1440 case R_390_GOT64:
1441 case R_390_GOTENT:
1442 if (h != NULL)
1443 {
1444 if (h->got.refcount > 0)
1445 h->got.refcount -= 1;
1446 }
1447 else if (local_got_refcounts != NULL)
1448 {
1449 if (local_got_refcounts[r_symndx] > 0)
1450 local_got_refcounts[r_symndx] -= 1;
1451 }
1452 break;
1453
1454 case R_390_8:
1455 case R_390_12:
1456 case R_390_16:
1457 case R_390_20:
1458 case R_390_32:
1459 case R_390_64:
1460 case R_390_PC16:
1461 case R_390_PC12DBL:
1462 case R_390_PC16DBL:
1463 case R_390_PC24DBL:
1464 case R_390_PC32:
1465 case R_390_PC32DBL:
1466 case R_390_PC64:
1467 if (bfd_link_pic (info))
1468 break;
1469 /* Fall through */
1470
1471 case R_390_PLT12DBL:
1472 case R_390_PLT16DBL:
1473 case R_390_PLT24DBL:
1474 case R_390_PLT32:
1475 case R_390_PLT32DBL:
1476 case R_390_PLT64:
1477 case R_390_PLTOFF16:
1478 case R_390_PLTOFF32:
1479 case R_390_PLTOFF64:
1480 if (h != NULL)
1481 {
1482 if (h->plt.refcount > 0)
1483 h->plt.refcount -= 1;
1484 }
1485 break;
1486
1487 case R_390_GOTPLT12:
1488 case R_390_GOTPLT16:
1489 case R_390_GOTPLT20:
1490 case R_390_GOTPLT32:
1491 case R_390_GOTPLT64:
1492 case R_390_GOTPLTENT:
1493 if (h != NULL)
1494 {
1495 if (h->plt.refcount > 0)
1496 {
1497 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1498 h->plt.refcount -= 1;
1499 }
1500 }
1501 else if (local_got_refcounts != NULL)
1502 {
1503 if (local_got_refcounts[r_symndx] > 0)
1504 local_got_refcounts[r_symndx] -= 1;
1505 }
1506 break;
1507
1508 default:
1509 break;
1510 }
1511 }
1512
1513 return TRUE;
1514 }
1515
1516 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1517 entry but we found we will not create any. Called when we find we will
1518 not have any PLT for this symbol, by for example
1519 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1520 or elf_s390_size_dynamic_sections if no dynamic sections will be
1521 created (we're only linking static objects). */
1522
1523 static void
1524 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1525 {
1526 if (h->elf.root.type == bfd_link_hash_warning)
1527 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1528
1529 if (h->gotplt_refcount <= 0)
1530 return;
1531
1532 /* We simply add the number of gotplt references to the number
1533 * of got references for this symbol. */
1534 h->elf.got.refcount += h->gotplt_refcount;
1535 h->gotplt_refcount = -1;
1536 }
1537
1538 /* Adjust a symbol defined by a dynamic object and referenced by a
1539 regular object. The current definition is in some section of the
1540 dynamic object, but we're not including those sections. We have to
1541 change the definition to something the rest of the link can
1542 understand. */
1543
1544 static bfd_boolean
1545 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1546 struct elf_link_hash_entry *h)
1547 {
1548 struct elf_s390_link_hash_table *htab;
1549 asection *s, *srel;
1550
1551 /* STT_GNU_IFUNC symbol must go through PLT. */
1552 if (s390_is_ifunc_symbol_p (h))
1553 {
1554 /* All local STT_GNU_IFUNC references must be treated as local
1555 calls via local PLT. */
1556 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1557 {
1558 bfd_size_type pc_count = 0, count = 0;
1559 struct elf_dyn_relocs **pp;
1560 struct elf_s390_link_hash_entry *eh;
1561 struct elf_dyn_relocs *p;
1562
1563 eh = (struct elf_s390_link_hash_entry *) h;
1564 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1565 {
1566 pc_count += p->pc_count;
1567 p->count -= p->pc_count;
1568 p->pc_count = 0;
1569 count += p->count;
1570 if (p->count == 0)
1571 *pp = p->next;
1572 else
1573 pp = &p->next;
1574 }
1575
1576 if (pc_count || count)
1577 {
1578 h->needs_plt = 1;
1579 h->non_got_ref = 1;
1580 if (h->plt.refcount <= 0)
1581 h->plt.refcount = 1;
1582 else
1583 h->plt.refcount += 1;
1584 }
1585 }
1586
1587 if (h->plt.refcount <= 0)
1588 {
1589 h->plt.offset = (bfd_vma) -1;
1590 h->needs_plt = 0;
1591 }
1592 return TRUE;
1593 }
1594
1595 /* If this is a function, put it in the procedure linkage table. We
1596 will fill in the contents of the procedure linkage table later
1597 (although we could actually do it here). */
1598 if (h->type == STT_FUNC
1599 || h->needs_plt)
1600 {
1601 if (h->plt.refcount <= 0
1602 || SYMBOL_CALLS_LOCAL (info, h)
1603 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1604 && h->root.type == bfd_link_hash_undefweak))
1605 {
1606 /* This case can occur if we saw a PLT32 reloc in an input
1607 file, but the symbol was never referred to by a dynamic
1608 object, or if all references were garbage collected. In
1609 such a case, we don't actually need to build a procedure
1610 linkage table, and we can just do a PC32 reloc instead. */
1611 h->plt.offset = (bfd_vma) -1;
1612 h->needs_plt = 0;
1613 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1614 }
1615
1616 return TRUE;
1617 }
1618 else
1619 /* It's possible that we incorrectly decided a .plt reloc was
1620 needed for an R_390_PC32 reloc to a non-function sym in
1621 check_relocs. We can't decide accurately between function and
1622 non-function syms in check-relocs; Objects loaded later in
1623 the link may change h->type. So fix it now. */
1624 h->plt.offset = (bfd_vma) -1;
1625
1626 /* If this is a weak symbol, and there is a real definition, the
1627 processor independent code will have arranged for us to see the
1628 real definition first, and we can just use the same value. */
1629 if (h->u.weakdef != NULL)
1630 {
1631 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1632 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1633 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1634 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1635 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1636 h->non_got_ref = h->u.weakdef->non_got_ref;
1637 return TRUE;
1638 }
1639
1640 /* This is a reference to a symbol defined by a dynamic object which
1641 is not a function. */
1642
1643 /* If we are creating a shared library, we must presume that the
1644 only references to the symbol are via the global offset table.
1645 For such cases we need not do anything here; the relocations will
1646 be handled correctly by relocate_section. */
1647 if (bfd_link_pic (info))
1648 return TRUE;
1649
1650 /* If there are no references to this symbol that do not use the
1651 GOT, we don't need to generate a copy reloc. */
1652 if (!h->non_got_ref)
1653 return TRUE;
1654
1655 /* If -z nocopyreloc was given, we won't generate them either. */
1656 if (info->nocopyreloc)
1657 {
1658 h->non_got_ref = 0;
1659 return TRUE;
1660 }
1661
1662 if (ELIMINATE_COPY_RELOCS)
1663 {
1664 struct elf_s390_link_hash_entry * eh;
1665 struct elf_dyn_relocs *p;
1666
1667 eh = (struct elf_s390_link_hash_entry *) h;
1668 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1669 {
1670 s = p->sec->output_section;
1671 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1672 break;
1673 }
1674
1675 /* If we didn't find any dynamic relocs in read-only sections, then
1676 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1677 if (p == NULL)
1678 {
1679 h->non_got_ref = 0;
1680 return TRUE;
1681 }
1682 }
1683
1684 /* We must allocate the symbol in our .dynbss section, which will
1685 become part of the .bss section of the executable. There will be
1686 an entry for this symbol in the .dynsym section. The dynamic
1687 object will contain position independent code, so all references
1688 from the dynamic object to this symbol will go through the global
1689 offset table. The dynamic linker will use the .dynsym entry to
1690 determine the address it must put in the global offset table, so
1691 both the dynamic object and the regular object will refer to the
1692 same memory location for the variable. */
1693
1694 htab = elf_s390_hash_table (info);
1695 if (htab == NULL)
1696 return FALSE;
1697
1698 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1699 copy the initial value out of the dynamic object and into the
1700 runtime process image. */
1701 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1702 {
1703 s = htab->elf.sdynrelro;
1704 srel = htab->elf.sreldynrelro;
1705 }
1706 else
1707 {
1708 s = htab->elf.sdynbss;
1709 srel = htab->elf.srelbss;
1710 }
1711 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1712 {
1713 srel->size += sizeof (Elf64_External_Rela);
1714 h->needs_copy = 1;
1715 }
1716
1717 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1718 }
1719
1720 /* Allocate space in .plt, .got and associated reloc sections for
1721 dynamic relocs. */
1722
1723 static bfd_boolean
1724 allocate_dynrelocs (struct elf_link_hash_entry *h,
1725 void * inf)
1726 {
1727 struct bfd_link_info *info;
1728 struct elf_s390_link_hash_table *htab;
1729 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1730 struct elf_dyn_relocs *p;
1731
1732 if (h->root.type == bfd_link_hash_indirect)
1733 return TRUE;
1734
1735 info = (struct bfd_link_info *) inf;
1736 htab = elf_s390_hash_table (info);
1737 if (htab == NULL)
1738 return FALSE;
1739
1740 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1741 here if it is defined and referenced in a non-shared object. */
1742 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1743 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1744 else if (htab->elf.dynamic_sections_created
1745 && h->plt.refcount > 0)
1746 {
1747 /* Make sure this symbol is output as a dynamic symbol.
1748 Undefined weak syms won't yet be marked as dynamic. */
1749 if (h->dynindx == -1
1750 && !h->forced_local)
1751 {
1752 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1753 return FALSE;
1754 }
1755
1756 if (bfd_link_pic (info)
1757 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1758 {
1759 asection *s = htab->elf.splt;
1760
1761 /* If this is the first .plt entry, make room for the special
1762 first entry. */
1763 if (s->size == 0)
1764 s->size += PLT_FIRST_ENTRY_SIZE;
1765
1766 h->plt.offset = s->size;
1767
1768 /* If this symbol is not defined in a regular file, and we are
1769 not generating a shared library, then set the symbol to this
1770 location in the .plt. This is required to make function
1771 pointers compare as equal between the normal executable and
1772 the shared library. */
1773 if (! bfd_link_pic (info)
1774 && !h->def_regular)
1775 {
1776 h->root.u.def.section = s;
1777 h->root.u.def.value = h->plt.offset;
1778 }
1779
1780 /* Make room for this entry. */
1781 s->size += PLT_ENTRY_SIZE;
1782
1783 /* We also need to make an entry in the .got.plt section, which
1784 will be placed in the .got section by the linker script. */
1785 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1786
1787 /* We also need to make an entry in the .rela.plt section. */
1788 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1789 }
1790 else
1791 {
1792 h->plt.offset = (bfd_vma) -1;
1793 h->needs_plt = 0;
1794 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1795 }
1796 }
1797 else
1798 {
1799 h->plt.offset = (bfd_vma) -1;
1800 h->needs_plt = 0;
1801 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1802 }
1803
1804 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1805 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1806 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1807 we can save the dynamic TLS relocation. */
1808 if (h->got.refcount > 0
1809 && !bfd_link_pic (info)
1810 && h->dynindx == -1
1811 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1812 {
1813 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1814 /* For the GOTIE access without a literal pool entry the offset has
1815 to be stored somewhere. The immediate value in the instruction
1816 is not bit enough so the value is stored in the got. */
1817 {
1818 h->got.offset = htab->elf.sgot->size;
1819 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1820 }
1821 else
1822 h->got.offset = (bfd_vma) -1;
1823 }
1824 else if (h->got.refcount > 0)
1825 {
1826 asection *s;
1827 bfd_boolean dyn;
1828 int tls_type = elf_s390_hash_entry(h)->tls_type;
1829
1830 /* Make sure this symbol is output as a dynamic symbol.
1831 Undefined weak syms won't yet be marked as dynamic. */
1832 if (h->dynindx == -1
1833 && !h->forced_local)
1834 {
1835 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1836 return FALSE;
1837 }
1838
1839 s = htab->elf.sgot;
1840 h->got.offset = s->size;
1841 s->size += GOT_ENTRY_SIZE;
1842 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1843 if (tls_type == GOT_TLS_GD)
1844 s->size += GOT_ENTRY_SIZE;
1845 dyn = htab->elf.dynamic_sections_created;
1846 /* R_390_TLS_IE64 needs one dynamic relocation,
1847 R_390_TLS_GD64 needs one if local symbol and two if global. */
1848 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1849 || tls_type >= GOT_TLS_IE)
1850 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1851 else if (tls_type == GOT_TLS_GD)
1852 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1853 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1854 || h->root.type != bfd_link_hash_undefweak)
1855 && (bfd_link_pic (info)
1856 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1857 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1858 }
1859 else
1860 h->got.offset = (bfd_vma) -1;
1861
1862 if (eh->dyn_relocs == NULL)
1863 return TRUE;
1864
1865 /* In the shared -Bsymbolic case, discard space allocated for
1866 dynamic pc-relative relocs against symbols which turn out to be
1867 defined in regular objects. For the normal shared case, discard
1868 space for pc-relative relocs that have become local due to symbol
1869 visibility changes. */
1870
1871 if (bfd_link_pic (info))
1872 {
1873 if (SYMBOL_CALLS_LOCAL (info, h))
1874 {
1875 struct elf_dyn_relocs **pp;
1876
1877 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1878 {
1879 p->count -= p->pc_count;
1880 p->pc_count = 0;
1881 if (p->count == 0)
1882 *pp = p->next;
1883 else
1884 pp = &p->next;
1885 }
1886 }
1887
1888 /* Also discard relocs on undefined weak syms with non-default
1889 visibility. */
1890 if (eh->dyn_relocs != NULL
1891 && h->root.type == bfd_link_hash_undefweak)
1892 {
1893 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1894 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1895 eh->dyn_relocs = NULL;
1896
1897 /* Make sure undefined weak symbols are output as a dynamic
1898 symbol in PIEs. */
1899 else if (h->dynindx == -1
1900 && !h->forced_local)
1901 {
1902 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1903 return FALSE;
1904 }
1905 }
1906 }
1907 else if (ELIMINATE_COPY_RELOCS)
1908 {
1909 /* For the non-shared case, discard space for relocs against
1910 symbols which turn out to need copy relocs or are not
1911 dynamic. */
1912
1913 if (!h->non_got_ref
1914 && ((h->def_dynamic
1915 && !h->def_regular)
1916 || (htab->elf.dynamic_sections_created
1917 && (h->root.type == bfd_link_hash_undefweak
1918 || h->root.type == bfd_link_hash_undefined))))
1919 {
1920 /* Make sure this symbol is output as a dynamic symbol.
1921 Undefined weak syms won't yet be marked as dynamic. */
1922 if (h->dynindx == -1
1923 && !h->forced_local)
1924 {
1925 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1926 return FALSE;
1927 }
1928
1929 /* If that succeeded, we know we'll be keeping all the
1930 relocs. */
1931 if (h->dynindx != -1)
1932 goto keep;
1933 }
1934
1935 eh->dyn_relocs = NULL;
1936
1937 keep: ;
1938 }
1939
1940 /* Finally, allocate space. */
1941 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1942 {
1943 asection *sreloc = elf_section_data (p->sec)->sreloc;
1944 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1945 }
1946
1947 return TRUE;
1948 }
1949
1950 /* Find any dynamic relocs that apply to read-only sections. */
1951
1952 static bfd_boolean
1953 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1954 {
1955 struct elf_s390_link_hash_entry *eh;
1956 struct elf_dyn_relocs *p;
1957
1958 eh = (struct elf_s390_link_hash_entry *) h;
1959 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1960 {
1961 asection *s = p->sec->output_section;
1962
1963 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1964 {
1965 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1966
1967 info->flags |= DF_TEXTREL;
1968
1969 /* Not an error, just cut short the traversal. */
1970 return FALSE;
1971 }
1972 }
1973 return TRUE;
1974 }
1975
1976 /* Set the sizes of the dynamic sections. */
1977
1978 static bfd_boolean
1979 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1980 struct bfd_link_info *info)
1981 {
1982 struct elf_s390_link_hash_table *htab;
1983 bfd *dynobj;
1984 asection *s;
1985 bfd_boolean relocs;
1986 bfd *ibfd;
1987
1988 htab = elf_s390_hash_table (info);
1989 if (htab == NULL)
1990 return FALSE;
1991
1992 dynobj = htab->elf.dynobj;
1993 if (dynobj == NULL)
1994 abort ();
1995
1996 if (htab->elf.dynamic_sections_created)
1997 {
1998 /* Set the contents of the .interp section to the interpreter. */
1999 if (bfd_link_executable (info) && !info->nointerp)
2000 {
2001 s = bfd_get_linker_section (dynobj, ".interp");
2002 if (s == NULL)
2003 abort ();
2004 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2005 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2006 }
2007 }
2008
2009 /* Set up .got offsets for local syms, and space for local dynamic
2010 relocs. */
2011 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2012 {
2013 bfd_signed_vma *local_got;
2014 bfd_signed_vma *end_local_got;
2015 char *local_tls_type;
2016 bfd_size_type locsymcount;
2017 Elf_Internal_Shdr *symtab_hdr;
2018 asection *srela;
2019 struct plt_entry *local_plt;
2020 unsigned int i;
2021
2022 if (! is_s390_elf (ibfd))
2023 continue;
2024
2025 for (s = ibfd->sections; s != NULL; s = s->next)
2026 {
2027 struct elf_dyn_relocs *p;
2028
2029 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2030 {
2031 if (!bfd_is_abs_section (p->sec)
2032 && bfd_is_abs_section (p->sec->output_section))
2033 {
2034 /* Input section has been discarded, either because
2035 it is a copy of a linkonce section or due to
2036 linker script /DISCARD/, so we'll be discarding
2037 the relocs too. */
2038 }
2039 else if (p->count != 0)
2040 {
2041 srela = elf_section_data (p->sec)->sreloc;
2042 srela->size += p->count * sizeof (Elf64_External_Rela);
2043 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2044 info->flags |= DF_TEXTREL;
2045 }
2046 }
2047 }
2048
2049 local_got = elf_local_got_refcounts (ibfd);
2050 if (!local_got)
2051 continue;
2052
2053 symtab_hdr = &elf_symtab_hdr (ibfd);
2054 locsymcount = symtab_hdr->sh_info;
2055 end_local_got = local_got + locsymcount;
2056 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2057 s = htab->elf.sgot;
2058 srela = htab->elf.srelgot;
2059 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2060 {
2061 if (*local_got > 0)
2062 {
2063 *local_got = s->size;
2064 s->size += GOT_ENTRY_SIZE;
2065 if (*local_tls_type == GOT_TLS_GD)
2066 s->size += GOT_ENTRY_SIZE;
2067 if (bfd_link_pic (info))
2068 srela->size += sizeof (Elf64_External_Rela);
2069 }
2070 else
2071 *local_got = (bfd_vma) -1;
2072 }
2073
2074 local_plt = elf_s390_local_plt (ibfd);
2075 for (i = 0; i < symtab_hdr->sh_info; i++)
2076 {
2077 if (local_plt[i].plt.refcount > 0)
2078 {
2079 local_plt[i].plt.offset = htab->elf.iplt->size;
2080 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2081 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2082 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2083 }
2084 else
2085 local_plt[i].plt.offset = (bfd_vma) -1;
2086 }
2087 }
2088
2089 if (htab->tls_ldm_got.refcount > 0)
2090 {
2091 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2092 relocs. */
2093 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2094 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2095 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2096 }
2097 else
2098 htab->tls_ldm_got.offset = -1;
2099
2100 /* Allocate global sym .plt and .got entries, and space for global
2101 sym dynamic relocs. */
2102 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2103
2104 /* We now have determined the sizes of the various dynamic sections.
2105 Allocate memory for them. */
2106 relocs = FALSE;
2107 for (s = dynobj->sections; s != NULL; s = s->next)
2108 {
2109 if ((s->flags & SEC_LINKER_CREATED) == 0)
2110 continue;
2111
2112 if (s == htab->elf.splt
2113 || s == htab->elf.sgot
2114 || s == htab->elf.sgotplt
2115 || s == htab->elf.sdynbss
2116 || s == htab->elf.sdynrelro
2117 || s == htab->elf.iplt
2118 || s == htab->elf.igotplt
2119 || s == htab->irelifunc)
2120 {
2121 /* Strip this section if we don't need it; see the
2122 comment below. */
2123 }
2124 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2125 {
2126 if (s->size != 0 && s != htab->elf.srelplt)
2127 relocs = TRUE;
2128
2129 /* We use the reloc_count field as a counter if we need
2130 to copy relocs into the output file. */
2131 s->reloc_count = 0;
2132 }
2133 else
2134 {
2135 /* It's not one of our sections, so don't allocate space. */
2136 continue;
2137 }
2138
2139 if (s->size == 0)
2140 {
2141 /* If we don't need this section, strip it from the
2142 output file. This is to handle .rela.bss and
2143 .rela.plt. We must create it in
2144 create_dynamic_sections, because it must be created
2145 before the linker maps input sections to output
2146 sections. The linker does that before
2147 adjust_dynamic_symbol is called, and it is that
2148 function which decides whether anything needs to go
2149 into these sections. */
2150
2151 s->flags |= SEC_EXCLUDE;
2152 continue;
2153 }
2154
2155 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2156 continue;
2157
2158 /* Allocate memory for the section contents. We use bfd_zalloc
2159 here in case unused entries are not reclaimed before the
2160 section's contents are written out. This should not happen,
2161 but this way if it does, we get a R_390_NONE reloc instead
2162 of garbage. */
2163 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2164 if (s->contents == NULL)
2165 return FALSE;
2166 }
2167
2168 if (htab->elf.dynamic_sections_created)
2169 {
2170 /* Add some entries to the .dynamic section. We fill in the
2171 values later, in elf_s390_finish_dynamic_sections, but we
2172 must add the entries now so that we get the correct size for
2173 the .dynamic section. The DT_DEBUG entry is filled in by the
2174 dynamic linker and used by the debugger. */
2175 #define add_dynamic_entry(TAG, VAL) \
2176 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2177
2178 if (bfd_link_executable (info))
2179 {
2180 if (!add_dynamic_entry (DT_DEBUG, 0))
2181 return FALSE;
2182 }
2183
2184 if (htab->elf.splt->size != 0)
2185 {
2186 if (!add_dynamic_entry (DT_PLTGOT, 0)
2187 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2188 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2189 || !add_dynamic_entry (DT_JMPREL, 0))
2190 return FALSE;
2191 }
2192
2193 if (relocs)
2194 {
2195 if (!add_dynamic_entry (DT_RELA, 0)
2196 || !add_dynamic_entry (DT_RELASZ, 0)
2197 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2198 return FALSE;
2199
2200 /* If any dynamic relocs apply to a read-only section,
2201 then we need a DT_TEXTREL entry. */
2202 if ((info->flags & DF_TEXTREL) == 0)
2203 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2204 info);
2205
2206 if ((info->flags & DF_TEXTREL) != 0)
2207 {
2208 if (!add_dynamic_entry (DT_TEXTREL, 0))
2209 return FALSE;
2210 }
2211 }
2212 }
2213 #undef add_dynamic_entry
2214
2215 return TRUE;
2216 }
2217
2218 /* Return the base VMA address which should be subtracted from real addresses
2219 when resolving @dtpoff relocation.
2220 This is PT_TLS segment p_vaddr. */
2221
2222 static bfd_vma
2223 dtpoff_base (struct bfd_link_info *info)
2224 {
2225 /* If tls_sec is NULL, we should have signalled an error already. */
2226 if (elf_hash_table (info)->tls_sec == NULL)
2227 return 0;
2228 return elf_hash_table (info)->tls_sec->vma;
2229 }
2230
2231 /* Return the relocation value for @tpoff relocation
2232 if STT_TLS virtual address is ADDRESS. */
2233
2234 static bfd_vma
2235 tpoff (struct bfd_link_info *info, bfd_vma address)
2236 {
2237 struct elf_link_hash_table *htab = elf_hash_table (info);
2238
2239 /* If tls_sec is NULL, we should have signalled an error already. */
2240 if (htab->tls_sec == NULL)
2241 return 0;
2242 return htab->tls_size + htab->tls_sec->vma - address;
2243 }
2244
2245 /* Complain if TLS instruction relocation is against an invalid
2246 instruction. */
2247
2248 static void
2249 invalid_tls_insn (bfd *input_bfd,
2250 asection *input_section,
2251 Elf_Internal_Rela *rel)
2252 {
2253 reloc_howto_type *howto;
2254
2255 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2256 _bfd_error_handler
2257 /* xgettext:c-format */
2258 (_("%B(%A+%#Lx): invalid instruction for TLS relocation %s"),
2259 input_bfd,
2260 input_section,
2261 rel->r_offset,
2262 howto->name);
2263 bfd_set_error (bfd_error_bad_value);
2264 }
2265
2266 /* Relocate a 390 ELF section. */
2267
2268 static bfd_boolean
2269 elf_s390_relocate_section (bfd *output_bfd,
2270 struct bfd_link_info *info,
2271 bfd *input_bfd,
2272 asection *input_section,
2273 bfd_byte *contents,
2274 Elf_Internal_Rela *relocs,
2275 Elf_Internal_Sym *local_syms,
2276 asection **local_sections)
2277 {
2278 struct elf_s390_link_hash_table *htab;
2279 Elf_Internal_Shdr *symtab_hdr;
2280 struct elf_link_hash_entry **sym_hashes;
2281 bfd_vma *local_got_offsets;
2282 Elf_Internal_Rela *rel;
2283 Elf_Internal_Rela *relend;
2284
2285 BFD_ASSERT (is_s390_elf (input_bfd));
2286
2287 htab = elf_s390_hash_table (info);
2288 if (htab == NULL)
2289 return FALSE;
2290
2291 symtab_hdr = &elf_symtab_hdr (input_bfd);
2292 sym_hashes = elf_sym_hashes (input_bfd);
2293 local_got_offsets = elf_local_got_offsets (input_bfd);
2294
2295 rel = relocs;
2296 relend = relocs + input_section->reloc_count;
2297 for (; rel < relend; rel++)
2298 {
2299 unsigned int r_type;
2300 reloc_howto_type *howto;
2301 unsigned long r_symndx;
2302 struct elf_link_hash_entry *h;
2303 Elf_Internal_Sym *sym;
2304 asection *sec;
2305 bfd_vma off;
2306 bfd_vma relocation;
2307 bfd_boolean unresolved_reloc;
2308 bfd_reloc_status_type r;
2309 int tls_type;
2310 asection *base_got = htab->elf.sgot;
2311 bfd_boolean resolved_to_zero;
2312
2313 r_type = ELF64_R_TYPE (rel->r_info);
2314 if (r_type == (int) R_390_GNU_VTINHERIT
2315 || r_type == (int) R_390_GNU_VTENTRY)
2316 continue;
2317 if (r_type >= (int) R_390_max)
2318 {
2319 bfd_set_error (bfd_error_bad_value);
2320 return FALSE;
2321 }
2322
2323 howto = elf_howto_table + r_type;
2324 r_symndx = ELF64_R_SYM (rel->r_info);
2325
2326 h = NULL;
2327 sym = NULL;
2328 sec = NULL;
2329 unresolved_reloc = FALSE;
2330 if (r_symndx < symtab_hdr->sh_info)
2331 {
2332 sym = local_syms + r_symndx;
2333 sec = local_sections[r_symndx];
2334
2335 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2336 {
2337 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2338 if (local_plt == NULL)
2339 return FALSE;
2340
2341 /* Address of the PLT slot. */
2342 relocation = (htab->elf.iplt->output_section->vma
2343 + htab->elf.iplt->output_offset
2344 + local_plt[r_symndx].plt.offset);
2345
2346 switch (r_type)
2347 {
2348 case R_390_PLTOFF16:
2349 case R_390_PLTOFF32:
2350 case R_390_PLTOFF64:
2351 relocation -= htab->elf.sgot->output_section->vma;
2352 break;
2353 case R_390_GOTPLT12:
2354 case R_390_GOTPLT16:
2355 case R_390_GOTPLT20:
2356 case R_390_GOTPLT32:
2357 case R_390_GOTPLT64:
2358 case R_390_GOTPLTENT:
2359 case R_390_GOT12:
2360 case R_390_GOT16:
2361 case R_390_GOT20:
2362 case R_390_GOT32:
2363 case R_390_GOT64:
2364 case R_390_GOTENT:
2365 {
2366 /* Write the PLT slot address into the GOT slot. */
2367 bfd_put_64 (output_bfd, relocation,
2368 htab->elf.sgot->contents +
2369 local_got_offsets[r_symndx]);
2370 relocation = (local_got_offsets[r_symndx] +
2371 htab->elf.sgot->output_offset);
2372
2373 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2374 relocation += htab->elf.sgot->output_section->vma;
2375 break;
2376 }
2377 default:
2378 break;
2379 }
2380 /* The output section is needed later in
2381 finish_dynamic_section when creating the dynamic
2382 relocation. */
2383 local_plt[r_symndx].sec = sec;
2384 goto do_relocation;
2385 }
2386 else
2387 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2388 }
2389 else
2390 {
2391 bfd_boolean warned ATTRIBUTE_UNUSED;
2392 bfd_boolean ignored ATTRIBUTE_UNUSED;
2393
2394 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2395 r_symndx, symtab_hdr, sym_hashes,
2396 h, sec, relocation,
2397 unresolved_reloc, warned, ignored);
2398 }
2399
2400 if (sec != NULL && discarded_section (sec))
2401 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2402 rel, 1, relend, howto, 0, contents);
2403
2404 if (bfd_link_relocatable (info))
2405 continue;
2406
2407 resolved_to_zero = (h != NULL
2408 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2409
2410 switch (r_type)
2411 {
2412 case R_390_GOTPLT12:
2413 case R_390_GOTPLT16:
2414 case R_390_GOTPLT20:
2415 case R_390_GOTPLT32:
2416 case R_390_GOTPLT64:
2417 case R_390_GOTPLTENT:
2418 /* There are three cases for a GOTPLT relocation. 1) The
2419 relocation is against the jump slot entry of a plt that
2420 will get emitted to the output file. 2) The relocation
2421 is against the jump slot of a plt entry that has been
2422 removed. elf_s390_adjust_gotplt has created a GOT entry
2423 as replacement. 3) The relocation is against a local symbol.
2424 Cases 2) and 3) are the same as the GOT relocation code
2425 so we just have to test for case 1 and fall through for
2426 the other two. */
2427 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2428 {
2429 bfd_vma plt_index;
2430
2431 if (s390_is_ifunc_symbol_p (h))
2432 {
2433 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2434 relocation = (plt_index * GOT_ENTRY_SIZE +
2435 htab->elf.igotplt->output_offset);
2436 if (r_type == R_390_GOTPLTENT)
2437 relocation += htab->elf.igotplt->output_section->vma;
2438 }
2439 else
2440 {
2441 /* Calc. index no.
2442 Current offset - size first entry / entry size. */
2443 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2444 PLT_ENTRY_SIZE;
2445
2446 /* Offset in GOT is PLT index plus GOT headers(3)
2447 times 8, addr & GOT addr. */
2448 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2449 if (r_type == R_390_GOTPLTENT)
2450 relocation += htab->elf.sgot->output_section->vma;
2451 }
2452 unresolved_reloc = FALSE;
2453 break;
2454 }
2455 /* Fall through. */
2456
2457 case R_390_GOT12:
2458 case R_390_GOT16:
2459 case R_390_GOT20:
2460 case R_390_GOT32:
2461 case R_390_GOT64:
2462 case R_390_GOTENT:
2463 /* Relocation is to the entry for this symbol in the global
2464 offset table. */
2465 if (base_got == NULL)
2466 abort ();
2467
2468 if (h != NULL)
2469 {
2470 bfd_boolean dyn;
2471
2472 off = h->got.offset;
2473 dyn = htab->elf.dynamic_sections_created;
2474
2475 if (s390_is_ifunc_symbol_p (h))
2476 {
2477 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2478 if (off == (bfd_vma)-1)
2479 {
2480 /* No explicit GOT usage so redirect to the
2481 got.iplt slot. */
2482 base_got = htab->elf.igotplt;
2483 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2484 }
2485 else
2486 {
2487 /* Explicit GOT slots must contain the address
2488 of the PLT slot. This will be handled in
2489 finish_dynamic_symbol. */
2490 }
2491 }
2492 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2493 bfd_link_pic (info),
2494 h)
2495 || (bfd_link_pic (info)
2496 && SYMBOL_REFERENCES_LOCAL (info, h))
2497 || (ELF_ST_VISIBILITY (h->other)
2498 && h->root.type == bfd_link_hash_undefweak))
2499 {
2500 /* This is actually a static link, or it is a
2501 -Bsymbolic link and the symbol is defined
2502 locally, or the symbol was forced to be local
2503 because of a version file. We must initialize
2504 this entry in the global offset table. Since the
2505 offset must always be a multiple of 2, we use the
2506 least significant bit to record whether we have
2507 initialized it already.
2508
2509 When doing a dynamic link, we create a .rel.got
2510 relocation entry to initialize the value. This
2511 is done in the finish_dynamic_symbol routine. */
2512 if ((off & 1) != 0)
2513 off &= ~1;
2514 else
2515 {
2516 bfd_put_64 (output_bfd, relocation,
2517 base_got->contents + off);
2518 h->got.offset |= 1;
2519 }
2520
2521 if ((h->def_regular
2522 && bfd_link_pic (info)
2523 && SYMBOL_REFERENCES_LOCAL (info, h))
2524 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2525 && ((r_type == R_390_GOTENT
2526 && (bfd_get_16 (input_bfd,
2527 contents + rel->r_offset - 2)
2528 & 0xff0f) == 0xc408)
2529 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2530 || (r_type == R_390_GOT20
2531 && (bfd_get_32 (input_bfd,
2532 contents + rel->r_offset - 2)
2533 & 0xff00f000) == 0xe300c000
2534 && bfd_get_8 (input_bfd,
2535 contents + rel->r_offset + 3) == 0x04)))
2536
2537 {
2538 unsigned short new_insn =
2539 (0xc000 | (bfd_get_8 (input_bfd,
2540 contents + rel->r_offset - 1) & 0xf0));
2541 bfd_put_16 (output_bfd, new_insn,
2542 contents + rel->r_offset - 2);
2543 r_type = R_390_PC32DBL;
2544 rel->r_addend = 2;
2545 howto = elf_howto_table + r_type;
2546 relocation = h->root.u.def.value
2547 + h->root.u.def.section->output_section->vma
2548 + h->root.u.def.section->output_offset;
2549 goto do_relocation;
2550 }
2551 }
2552 else
2553 unresolved_reloc = FALSE;
2554 }
2555 else
2556 {
2557 if (local_got_offsets == NULL)
2558 abort ();
2559
2560 off = local_got_offsets[r_symndx];
2561
2562 /* The offset must always be a multiple of 8. We use
2563 the least significant bit to record whether we have
2564 already generated the necessary reloc. */
2565 if ((off & 1) != 0)
2566 off &= ~1;
2567 else
2568 {
2569 bfd_put_64 (output_bfd, relocation,
2570 htab->elf.sgot->contents + off);
2571
2572 if (bfd_link_pic (info))
2573 {
2574 asection *s;
2575 Elf_Internal_Rela outrel;
2576 bfd_byte *loc;
2577
2578 s = htab->elf.srelgot;
2579 if (s == NULL)
2580 abort ();
2581
2582 outrel.r_offset = (htab->elf.sgot->output_section->vma
2583 + htab->elf.sgot->output_offset
2584 + off);
2585 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2586 outrel.r_addend = relocation;
2587 loc = s->contents;
2588 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2589 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2590 }
2591
2592 local_got_offsets[r_symndx] |= 1;
2593 }
2594 }
2595
2596 if (off >= (bfd_vma) -2)
2597 abort ();
2598
2599 relocation = base_got->output_offset + off;
2600
2601 /* For @GOTENT the relocation is against the offset between
2602 the instruction and the symbols entry in the GOT and not
2603 between the start of the GOT and the symbols entry. We
2604 add the vma of the GOT to get the correct value. */
2605 if ( r_type == R_390_GOTENT
2606 || r_type == R_390_GOTPLTENT)
2607 relocation += base_got->output_section->vma;
2608
2609 break;
2610
2611 case R_390_GOTOFF16:
2612 case R_390_GOTOFF32:
2613 case R_390_GOTOFF64:
2614 /* Relocation is relative to the start of the global offset
2615 table. */
2616
2617 if (h != NULL
2618 && s390_is_ifunc_symbol_p (h)
2619 && h->def_regular
2620 && !bfd_link_executable (info))
2621 {
2622 relocation = (htab->elf.iplt->output_section->vma
2623 + htab->elf.iplt->output_offset
2624 + h->plt.offset
2625 - htab->elf.sgot->output_section->vma);
2626 goto do_relocation;
2627 }
2628
2629 /* Note that sgot->output_offset is not involved in this
2630 calculation. We always want the start of .got. If we
2631 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2632 permitted by the ABI, we might have to change this
2633 calculation. */
2634 relocation -= htab->elf.sgot->output_section->vma;
2635 break;
2636
2637 case R_390_GOTPC:
2638 case R_390_GOTPCDBL:
2639 /* Use global offset table as symbol value. */
2640 relocation = htab->elf.sgot->output_section->vma;
2641 unresolved_reloc = FALSE;
2642 break;
2643
2644 case R_390_PLT12DBL:
2645 case R_390_PLT16DBL:
2646 case R_390_PLT24DBL:
2647 case R_390_PLT32:
2648 case R_390_PLT32DBL:
2649 case R_390_PLT64:
2650 /* Relocation is to the entry for this symbol in the
2651 procedure linkage table. */
2652
2653 /* Resolve a PLT32 reloc against a local symbol directly,
2654 without using the procedure linkage table. */
2655 if (h == NULL)
2656 break;
2657
2658 if (h->plt.offset == (bfd_vma) -1
2659 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2660 {
2661 /* We didn't make a PLT entry for this symbol. This
2662 happens when statically linking PIC code, or when
2663 using -Bsymbolic. */
2664 break;
2665 }
2666 if (s390_is_ifunc_symbol_p (h))
2667 relocation = (htab->elf.iplt->output_section->vma
2668 + htab->elf.iplt->output_offset
2669 + h->plt.offset);
2670 else
2671 relocation = (htab->elf.splt->output_section->vma
2672 + htab->elf.splt->output_offset
2673 + h->plt.offset);
2674 unresolved_reloc = FALSE;
2675 break;
2676
2677 case R_390_PLTOFF16:
2678 case R_390_PLTOFF32:
2679 case R_390_PLTOFF64:
2680 /* Relocation is to the entry for this symbol in the
2681 procedure linkage table relative to the start of the GOT. */
2682
2683 /* For local symbols or if we didn't make a PLT entry for
2684 this symbol resolve the symbol directly. */
2685 if (h == NULL
2686 || h->plt.offset == (bfd_vma) -1
2687 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2688 {
2689 relocation -= htab->elf.sgot->output_section->vma;
2690 break;
2691 }
2692
2693 if (s390_is_ifunc_symbol_p (h))
2694 relocation = (htab->elf.iplt->output_section->vma
2695 + htab->elf.iplt->output_offset
2696 + h->plt.offset
2697 - htab->elf.sgot->output_section->vma);
2698 else
2699 relocation = (htab->elf.splt->output_section->vma
2700 + htab->elf.splt->output_offset
2701 + h->plt.offset
2702 - htab->elf.sgot->output_section->vma);
2703 unresolved_reloc = FALSE;
2704 break;
2705
2706 case R_390_PC16:
2707 case R_390_PC12DBL:
2708 case R_390_PC16DBL:
2709 case R_390_PC24DBL:
2710 case R_390_PC32:
2711 case R_390_PC32DBL:
2712 case R_390_PC64:
2713 if (h != NULL
2714 && bfd_link_pie (info)
2715 && !h->def_regular)
2716 {
2717 _bfd_error_handler (_("%B: `%s' non-PLT reloc for symbol defined "
2718 "in shared library and accessed "
2719 "from executable "
2720 "(rebuild file with -fPIC ?)"),
2721 input_bfd, h->root.root.string);
2722 bfd_set_error (bfd_error_bad_value);
2723 return FALSE;
2724 }
2725 /* The target of these relocs are instruction operands
2726 residing in read-only sections. We cannot emit a runtime
2727 reloc for it. */
2728 if (h != NULL
2729 && s390_is_ifunc_symbol_p (h)
2730 && h->def_regular
2731 && bfd_link_pic (info))
2732 {
2733 relocation = (htab->elf.iplt->output_section->vma
2734 + htab->elf.iplt->output_offset
2735 + h->plt.offset);
2736 goto do_relocation;
2737 }
2738 /* Fall through. */
2739
2740 case R_390_8:
2741 case R_390_16:
2742 case R_390_32:
2743 case R_390_64:
2744
2745 if (h != NULL
2746 && s390_is_ifunc_symbol_p (h)
2747 && h->def_regular)
2748 {
2749 if (!bfd_link_pic (info))
2750 {
2751 /* For a non-shared object the symbol will not
2752 change. Hence we can write the address of the
2753 target IPLT slot now. */
2754 relocation = (htab->elf.iplt->output_section->vma
2755 + htab->elf.iplt->output_offset
2756 + h ->plt.offset);
2757 goto do_relocation;
2758 }
2759 else
2760 {
2761 /* For shared objects a runtime relocation is needed. */
2762
2763 Elf_Internal_Rela outrel;
2764 asection *sreloc;
2765
2766 /* Need a dynamic relocation to get the real function
2767 address. */
2768 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2769 info,
2770 input_section,
2771 rel->r_offset);
2772 if (outrel.r_offset == (bfd_vma) -1
2773 || outrel.r_offset == (bfd_vma) -2)
2774 abort ();
2775
2776 outrel.r_offset += (input_section->output_section->vma
2777 + input_section->output_offset);
2778
2779 if (h->dynindx == -1
2780 || h->forced_local
2781 || bfd_link_executable (info))
2782 {
2783 /* This symbol is resolved locally. */
2784 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2785 outrel.r_addend = (h->root.u.def.value
2786 + h->root.u.def.section->output_section->vma
2787 + h->root.u.def.section->output_offset);
2788 }
2789 else
2790 {
2791 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2792 outrel.r_addend = 0;
2793 }
2794
2795 sreloc = htab->elf.irelifunc;
2796 elf_append_rela (output_bfd, sreloc, &outrel);
2797
2798 /* If this reloc is against an external symbol, we
2799 do not want to fiddle with the addend. Otherwise,
2800 we need to include the symbol value so that it
2801 becomes an addend for the dynamic reloc. For an
2802 internal symbol, we have updated addend. */
2803 continue;
2804 }
2805 }
2806
2807 if ((input_section->flags & SEC_ALLOC) == 0)
2808 break;
2809
2810 if ((bfd_link_pic (info)
2811 && (h == NULL
2812 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2813 && !resolved_to_zero)
2814 || h->root.type != bfd_link_hash_undefweak)
2815 && ((r_type != R_390_PC16
2816 && r_type != R_390_PC12DBL
2817 && r_type != R_390_PC16DBL
2818 && r_type != R_390_PC24DBL
2819 && r_type != R_390_PC32
2820 && r_type != R_390_PC32DBL
2821 && r_type != R_390_PC64)
2822 || !SYMBOL_CALLS_LOCAL (info, h)))
2823 || (ELIMINATE_COPY_RELOCS
2824 && !bfd_link_pic (info)
2825 && h != NULL
2826 && h->dynindx != -1
2827 && !h->non_got_ref
2828 && ((h->def_dynamic
2829 && !h->def_regular)
2830 || h->root.type == bfd_link_hash_undefweak
2831 || h->root.type == bfd_link_hash_undefined)))
2832 {
2833 Elf_Internal_Rela outrel;
2834 bfd_boolean skip, relocate;
2835 asection *sreloc;
2836 bfd_byte *loc;
2837
2838 /* When generating a shared object, these relocations
2839 are copied into the output file to be resolved at run
2840 time. */
2841 skip = FALSE;
2842 relocate = FALSE;
2843
2844 outrel.r_offset =
2845 _bfd_elf_section_offset (output_bfd, info, input_section,
2846 rel->r_offset);
2847 if (outrel.r_offset == (bfd_vma) -1)
2848 skip = TRUE;
2849 else if (outrel.r_offset == (bfd_vma) -2)
2850 skip = TRUE, relocate = TRUE;
2851
2852 outrel.r_offset += (input_section->output_section->vma
2853 + input_section->output_offset);
2854
2855 if (skip)
2856 memset (&outrel, 0, sizeof outrel);
2857 else if (h != NULL
2858 && h->dynindx != -1
2859 && (r_type == R_390_PC16
2860 || r_type == R_390_PC12DBL
2861 || r_type == R_390_PC16DBL
2862 || r_type == R_390_PC24DBL
2863 || r_type == R_390_PC32
2864 || r_type == R_390_PC32DBL
2865 || r_type == R_390_PC64
2866 || !bfd_link_pic (info)
2867 || !SYMBOLIC_BIND (info, h)
2868 || !h->def_regular))
2869 {
2870 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2871 outrel.r_addend = rel->r_addend;
2872 }
2873 else
2874 {
2875 /* This symbol is local, or marked to become local. */
2876 outrel.r_addend = relocation + rel->r_addend;
2877 if (r_type == R_390_64)
2878 {
2879 relocate = TRUE;
2880 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2881 }
2882 else
2883 {
2884 long sindx;
2885
2886 if (bfd_is_abs_section (sec))
2887 sindx = 0;
2888 else if (sec == NULL || sec->owner == NULL)
2889 {
2890 bfd_set_error(bfd_error_bad_value);
2891 return FALSE;
2892 }
2893 else
2894 {
2895 asection *osec;
2896
2897 osec = sec->output_section;
2898 sindx = elf_section_data (osec)->dynindx;
2899
2900 if (sindx == 0)
2901 {
2902 osec = htab->elf.text_index_section;
2903 sindx = elf_section_data (osec)->dynindx;
2904 }
2905 BFD_ASSERT (sindx != 0);
2906
2907 /* We are turning this relocation into one
2908 against a section symbol, so subtract out
2909 the output section's address but not the
2910 offset of the input section in the output
2911 section. */
2912 outrel.r_addend -= osec->vma;
2913 }
2914 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2915 }
2916 }
2917
2918 sreloc = elf_section_data (input_section)->sreloc;
2919 if (sreloc == NULL)
2920 abort ();
2921
2922 loc = sreloc->contents;
2923 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2924 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2925
2926 /* If this reloc is against an external symbol, we do
2927 not want to fiddle with the addend. Otherwise, we
2928 need to include the symbol value so that it becomes
2929 an addend for the dynamic reloc. */
2930 if (! relocate)
2931 continue;
2932 }
2933
2934 break;
2935
2936 /* Relocations for tls literal pool entries. */
2937 case R_390_TLS_IE64:
2938 if (bfd_link_pic (info))
2939 {
2940 Elf_Internal_Rela outrel;
2941 asection *sreloc;
2942 bfd_byte *loc;
2943
2944 outrel.r_offset = rel->r_offset
2945 + input_section->output_section->vma
2946 + input_section->output_offset;
2947 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2948 sreloc = elf_section_data (input_section)->sreloc;
2949 if (sreloc == NULL)
2950 abort ();
2951 loc = sreloc->contents;
2952 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2953 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2954 }
2955 /* Fall through. */
2956
2957 case R_390_TLS_GD64:
2958 case R_390_TLS_GOTIE64:
2959 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2960 tls_type = GOT_UNKNOWN;
2961 if (h == NULL && local_got_offsets)
2962 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2963 else if (h != NULL)
2964 {
2965 tls_type = elf_s390_hash_entry(h)->tls_type;
2966 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2967 r_type = R_390_TLS_LE64;
2968 }
2969 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2970 r_type = R_390_TLS_IE64;
2971
2972 if (r_type == R_390_TLS_LE64)
2973 {
2974 /* This relocation gets optimized away by the local exec
2975 access optimization. */
2976 BFD_ASSERT (! unresolved_reloc);
2977 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2978 contents + rel->r_offset);
2979 continue;
2980 }
2981
2982 if (htab->elf.sgot == NULL)
2983 abort ();
2984
2985 if (h != NULL)
2986 off = h->got.offset;
2987 else
2988 {
2989 if (local_got_offsets == NULL)
2990 abort ();
2991
2992 off = local_got_offsets[r_symndx];
2993 }
2994
2995 emit_tls_relocs:
2996
2997 if ((off & 1) != 0)
2998 off &= ~1;
2999 else
3000 {
3001 Elf_Internal_Rela outrel;
3002 bfd_byte *loc;
3003 int dr_type, indx;
3004
3005 if (htab->elf.srelgot == NULL)
3006 abort ();
3007
3008 outrel.r_offset = (htab->elf.sgot->output_section->vma
3009 + htab->elf.sgot->output_offset + off);
3010
3011 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3012 if (r_type == R_390_TLS_GD64)
3013 dr_type = R_390_TLS_DTPMOD;
3014 else
3015 dr_type = R_390_TLS_TPOFF;
3016 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3017 outrel.r_addend = relocation - dtpoff_base (info);
3018 else
3019 outrel.r_addend = 0;
3020 outrel.r_info = ELF64_R_INFO (indx, dr_type);
3021 loc = htab->elf.srelgot->contents;
3022 loc += htab->elf.srelgot->reloc_count++
3023 * sizeof (Elf64_External_Rela);
3024 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3025
3026 if (r_type == R_390_TLS_GD64)
3027 {
3028 if (indx == 0)
3029 {
3030 BFD_ASSERT (! unresolved_reloc);
3031 bfd_put_64 (output_bfd,
3032 relocation - dtpoff_base (info),
3033 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3034 }
3035 else
3036 {
3037 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
3038 outrel.r_offset += GOT_ENTRY_SIZE;
3039 outrel.r_addend = 0;
3040 htab->elf.srelgot->reloc_count++;
3041 loc += sizeof (Elf64_External_Rela);
3042 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3043 }
3044 }
3045
3046 if (h != NULL)
3047 h->got.offset |= 1;
3048 else
3049 local_got_offsets[r_symndx] |= 1;
3050 }
3051
3052 if (off >= (bfd_vma) -2)
3053 abort ();
3054 if (r_type == ELF64_R_TYPE (rel->r_info))
3055 {
3056 relocation = htab->elf.sgot->output_offset + off;
3057 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3058 relocation += htab->elf.sgot->output_section->vma;
3059 unresolved_reloc = FALSE;
3060 }
3061 else
3062 {
3063 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3064 contents + rel->r_offset);
3065 continue;
3066 }
3067 break;
3068
3069 case R_390_TLS_GOTIE12:
3070 case R_390_TLS_GOTIE20:
3071 case R_390_TLS_IEENT:
3072 if (h == NULL)
3073 {
3074 if (local_got_offsets == NULL)
3075 abort();
3076 off = local_got_offsets[r_symndx];
3077 if (bfd_link_pic (info))
3078 goto emit_tls_relocs;
3079 }
3080 else
3081 {
3082 off = h->got.offset;
3083 tls_type = elf_s390_hash_entry(h)->tls_type;
3084 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3085 goto emit_tls_relocs;
3086 }
3087
3088 if (htab->elf.sgot == NULL)
3089 abort ();
3090
3091 BFD_ASSERT (! unresolved_reloc);
3092 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3093 htab->elf.sgot->contents + off);
3094 relocation = htab->elf.sgot->output_offset + off;
3095 if (r_type == R_390_TLS_IEENT)
3096 relocation += htab->elf.sgot->output_section->vma;
3097 unresolved_reloc = FALSE;
3098 break;
3099
3100 case R_390_TLS_LDM64:
3101 if (! bfd_link_pic (info))
3102 /* The literal pool entry this relocation refers to gets ignored
3103 by the optimized code of the local exec model. Do nothing
3104 and the value will turn out zero. */
3105 continue;
3106
3107 if (htab->elf.sgot == NULL)
3108 abort ();
3109
3110 off = htab->tls_ldm_got.offset;
3111 if (off & 1)
3112 off &= ~1;
3113 else
3114 {
3115 Elf_Internal_Rela outrel;
3116 bfd_byte *loc;
3117
3118 if (htab->elf.srelgot == NULL)
3119 abort ();
3120
3121 outrel.r_offset = (htab->elf.sgot->output_section->vma
3122 + htab->elf.sgot->output_offset + off);
3123
3124 bfd_put_64 (output_bfd, 0,
3125 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3126 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3127 outrel.r_addend = 0;
3128 loc = htab->elf.srelgot->contents;
3129 loc += htab->elf.srelgot->reloc_count++
3130 * sizeof (Elf64_External_Rela);
3131 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3132 htab->tls_ldm_got.offset |= 1;
3133 }
3134 relocation = htab->elf.sgot->output_offset + off;
3135 unresolved_reloc = FALSE;
3136 break;
3137
3138 case R_390_TLS_LE64:
3139 if (bfd_link_dll (info))
3140 {
3141 /* Linking a shared library with non-fpic code requires
3142 a R_390_TLS_TPOFF relocation. */
3143 Elf_Internal_Rela outrel;
3144 asection *sreloc;
3145 bfd_byte *loc;
3146 int indx;
3147
3148 outrel.r_offset = rel->r_offset
3149 + input_section->output_section->vma
3150 + input_section->output_offset;
3151 if (h != NULL && h->dynindx != -1)
3152 indx = h->dynindx;
3153 else
3154 indx = 0;
3155 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3156 if (indx == 0)
3157 outrel.r_addend = relocation - dtpoff_base (info);
3158 else
3159 outrel.r_addend = 0;
3160 sreloc = elf_section_data (input_section)->sreloc;
3161 if (sreloc == NULL)
3162 abort ();
3163 loc = sreloc->contents;
3164 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3165 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3166 }
3167 else
3168 {
3169 BFD_ASSERT (! unresolved_reloc);
3170 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3171 contents + rel->r_offset);
3172 }
3173 continue;
3174
3175 case R_390_TLS_LDO64:
3176 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3177 relocation -= dtpoff_base (info);
3178 else
3179 /* When converting LDO to LE, we must negate. */
3180 relocation = -tpoff (info, relocation);
3181 break;
3182
3183 /* Relocations for tls instructions. */
3184 case R_390_TLS_LOAD:
3185 case R_390_TLS_GDCALL:
3186 case R_390_TLS_LDCALL:
3187 tls_type = GOT_UNKNOWN;
3188 if (h == NULL && local_got_offsets)
3189 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3190 else if (h != NULL)
3191 tls_type = elf_s390_hash_entry(h)->tls_type;
3192
3193 if (tls_type == GOT_TLS_GD)
3194 continue;
3195
3196 if (r_type == R_390_TLS_LOAD)
3197 {
3198 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3199 {
3200 /* IE->LE transition. Four valid cases:
3201 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3202 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3203 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3204 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3205 unsigned int insn0, insn1, ry;
3206
3207 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3208 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3209 if (insn1 != 0x0004)
3210 {
3211 invalid_tls_insn (input_bfd, input_section, rel);
3212 return FALSE;
3213 }
3214 if ((insn0 & 0xff00f000) == 0xe3000000)
3215 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3216 ry = (insn0 & 0x000f0000);
3217 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3218 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3219 ry = (insn0 & 0x0000f000) << 4;
3220 else if ((insn0 & 0xff00f000) == 0xe300c000)
3221 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3222 ry = (insn0 & 0x000f0000);
3223 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3224 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3225 ry = (insn0 & 0x0000f000) << 4;
3226 else
3227 {
3228 invalid_tls_insn (input_bfd, input_section, rel);
3229 return FALSE;
3230 }
3231 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3232 insn1 = 0x000d;
3233 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3234 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3235 }
3236 }
3237 else if (r_type == R_390_TLS_GDCALL)
3238 {
3239 unsigned int insn0, insn1;
3240
3241 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3242 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3243 if ((insn0 & 0xffff0000) != 0xc0e50000)
3244 {
3245 invalid_tls_insn (input_bfd, input_section, rel);
3246 return FALSE;
3247 }
3248 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3249 {
3250 /* GD->LE transition.
3251 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3252 insn0 = 0xc0040000;
3253 insn1 = 0x0000;
3254 }
3255 else
3256 {
3257 /* GD->IE transition.
3258 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3259 insn0 = 0xe322c000;
3260 insn1 = 0x0004;
3261 }
3262 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3263 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3264 }
3265 else if (r_type == R_390_TLS_LDCALL)
3266 {
3267 if (!bfd_link_pic (info))
3268 {
3269 unsigned int insn0, insn1;
3270
3271 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3272 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3273 if ((insn0 & 0xffff0000) != 0xc0e50000)
3274 {
3275 invalid_tls_insn (input_bfd, input_section, rel);
3276 return FALSE;
3277 }
3278 /* LD->LE transition.
3279 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3280 insn0 = 0xc0040000;
3281 insn1 = 0x0000;
3282 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3283 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3284 }
3285 }
3286 continue;
3287
3288 default:
3289 break;
3290 }
3291
3292 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3293 because such sections are not SEC_ALLOC and thus ld.so will
3294 not process them. */
3295 if (unresolved_reloc
3296 && !((input_section->flags & SEC_DEBUGGING) != 0
3297 && h->def_dynamic)
3298 && _bfd_elf_section_offset (output_bfd, info, input_section,
3299 rel->r_offset) != (bfd_vma) -1)
3300 _bfd_error_handler
3301 /* xgettext:c-format */
3302 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3303 input_bfd,
3304 input_section,
3305 rel->r_offset,
3306 howto->name,
3307 h->root.root.string);
3308
3309 do_relocation:
3310
3311 /* When applying a 24 bit reloc we need to start one byte
3312 earlier. Otherwise the 32 bit get/put bfd operations might
3313 access a byte after the actual section. */
3314 if (r_type == R_390_PC24DBL
3315 || r_type == R_390_PLT24DBL)
3316 rel->r_offset--;
3317
3318 if (r_type == R_390_20
3319 || r_type == R_390_GOT20
3320 || r_type == R_390_GOTPLT20
3321 || r_type == R_390_TLS_GOTIE20)
3322 {
3323 relocation += rel->r_addend;
3324 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3325 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3326 contents, rel->r_offset,
3327 relocation, 0);
3328 }
3329 else
3330 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3331 contents, rel->r_offset,
3332 relocation, rel->r_addend);
3333
3334 if (r != bfd_reloc_ok)
3335 {
3336 const char *name;
3337
3338 if (h != NULL)
3339 name = h->root.root.string;
3340 else
3341 {
3342 name = bfd_elf_string_from_elf_section (input_bfd,
3343 symtab_hdr->sh_link,
3344 sym->st_name);
3345 if (name == NULL)
3346 return FALSE;
3347 if (*name == '\0')
3348 name = bfd_section_name (input_bfd, sec);
3349 }
3350
3351 if (r == bfd_reloc_overflow)
3352 (*info->callbacks->reloc_overflow)
3353 (info, (h ? &h->root : NULL), name, howto->name,
3354 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3355 else
3356 {
3357 _bfd_error_handler
3358 /* xgettext:c-format */
3359 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3360 input_bfd, input_section,
3361 rel->r_offset, name, (int) r);
3362 return FALSE;
3363 }
3364 }
3365 }
3366
3367 return TRUE;
3368 }
3369
3370 /* Generate the PLT slots together with the dynamic relocations needed
3371 for IFUNC symbols. */
3372
3373 static void
3374 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3375 struct bfd_link_info *info,
3376 struct elf_link_hash_entry *h,
3377 struct elf_s390_link_hash_table *htab,
3378 bfd_vma plt_offset,
3379 bfd_vma resolver_address)
3380 {
3381 bfd_vma plt_index;
3382 bfd_vma got_offset;
3383 Elf_Internal_Rela rela;
3384 bfd_byte *loc;
3385 asection *plt, *gotplt, *relplt;
3386
3387 if (htab->elf.iplt == NULL
3388 || htab->elf.igotplt == NULL
3389 || htab->elf.irelplt == NULL)
3390 abort ();
3391
3392 /* Index of the PLT slot within iplt section. */
3393 plt_index = plt_offset / PLT_ENTRY_SIZE;
3394 plt = htab->elf.iplt;
3395 /* Offset into the igot.plt section. */
3396 got_offset = plt_index * GOT_ENTRY_SIZE;
3397 gotplt = htab->elf.igotplt;
3398 relplt = htab->elf.irelplt;
3399
3400 /* Fill in the blueprint of a PLT. */
3401 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3402 PLT_ENTRY_SIZE);
3403
3404 /* Fixup the relative address to the GOT entry */
3405 bfd_put_32 (output_bfd,
3406 (gotplt->output_section->vma +
3407 gotplt->output_offset + got_offset
3408 - (plt->output_section->vma +
3409 plt->output_offset +
3410 plt_offset))/2,
3411 plt->contents + plt_offset + 2);
3412 /* Fixup the relative branch to PLT 0 */
3413 bfd_put_32 (output_bfd, - (plt->output_offset +
3414 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3415 plt->contents + plt_offset + 24);
3416 /* Fixup offset into .rela.plt section. */
3417 bfd_put_32 (output_bfd, relplt->output_offset +
3418 plt_index * sizeof (Elf64_External_Rela),
3419 plt->contents + plt_offset + 28);
3420
3421 /* Fill in the entry in the global offset table.
3422 Points to instruction after GOT offset. */
3423 bfd_put_64 (output_bfd,
3424 (plt->output_section->vma
3425 + plt->output_offset
3426 + plt_offset
3427 + 14),
3428 gotplt->contents + got_offset);
3429
3430 /* Fill in the entry in the .rela.plt section. */
3431 rela.r_offset = (gotplt->output_section->vma
3432 + gotplt->output_offset
3433 + got_offset);
3434
3435 if (!h
3436 || h->dynindx == -1
3437 || ((bfd_link_executable (info)
3438 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3439 && h->def_regular))
3440 {
3441 /* The symbol can be locally resolved. */
3442 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3443 rela.r_addend = resolver_address;
3444 }
3445 else
3446 {
3447 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3448 rela.r_addend = 0;
3449 }
3450
3451 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3452 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3453 }
3454
3455
3456 /* Finish up dynamic symbol handling. We set the contents of various
3457 dynamic sections here. */
3458
3459 static bfd_boolean
3460 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3461 struct bfd_link_info *info,
3462 struct elf_link_hash_entry *h,
3463 Elf_Internal_Sym *sym)
3464 {
3465 struct elf_s390_link_hash_table *htab;
3466 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3467
3468 htab = elf_s390_hash_table (info);
3469 if (htab == NULL)
3470 return FALSE;
3471
3472 if (h->plt.offset != (bfd_vma) -1)
3473 {
3474 bfd_vma plt_index;
3475 bfd_vma got_offset;
3476 Elf_Internal_Rela rela;
3477 bfd_byte *loc;
3478
3479 /* This symbol has an entry in the procedure linkage table. Set
3480 it up. */
3481 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3482 {
3483 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3484 htab, h->plt.offset,
3485 eh->ifunc_resolver_address +
3486 eh->ifunc_resolver_section->output_offset +
3487 eh->ifunc_resolver_section->output_section->vma);
3488
3489 /* Do not return yet. Handling of explicit GOT slots of
3490 IFUNC symbols is below. */
3491 }
3492 else
3493 {
3494 if (h->dynindx == -1
3495 || htab->elf.splt == NULL
3496 || htab->elf.sgotplt == NULL
3497 || htab->elf.srelplt == NULL)
3498 abort ();
3499
3500 /* Calc. index no.
3501 Current offset - size first entry / entry size. */
3502 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3503
3504 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3505 addr & GOT addr. */
3506 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3507
3508 /* Fill in the blueprint of a PLT. */
3509 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3510 PLT_ENTRY_SIZE);
3511
3512 /* Fixup the relative address to the GOT entry */
3513 bfd_put_32 (output_bfd,
3514 (htab->elf.sgotplt->output_section->vma +
3515 htab->elf.sgotplt->output_offset + got_offset
3516 - (htab->elf.splt->output_section->vma +
3517 htab->elf.splt->output_offset +
3518 h->plt.offset))/2,
3519 htab->elf.splt->contents + h->plt.offset + 2);
3520 /* Fixup the relative branch to PLT 0 */
3521 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3522 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3523 htab->elf.splt->contents + h->plt.offset + 24);
3524 /* Fixup offset into .rela.plt section. */
3525 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3526 htab->elf.splt->contents + h->plt.offset + 28);
3527
3528 /* Fill in the entry in the global offset table.
3529 Points to instruction after GOT offset. */
3530 bfd_put_64 (output_bfd,
3531 (htab->elf.splt->output_section->vma
3532 + htab->elf.splt->output_offset
3533 + h->plt.offset
3534 + 14),
3535 htab->elf.sgotplt->contents + got_offset);
3536
3537 /* Fill in the entry in the .rela.plt section. */
3538 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3539 + htab->elf.sgotplt->output_offset
3540 + got_offset);
3541 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3542 rela.r_addend = 0;
3543 loc = htab->elf.srelplt->contents + plt_index *
3544 sizeof (Elf64_External_Rela);
3545 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3546
3547 if (!h->def_regular)
3548 {
3549 /* Mark the symbol as undefined, rather than as defined in
3550 the .plt section. Leave the value alone. This is a clue
3551 for the dynamic linker, to make function pointer
3552 comparisons work between an application and shared
3553 library. */
3554 sym->st_shndx = SHN_UNDEF;
3555 }
3556 }
3557 }
3558
3559 if (h->got.offset != (bfd_vma) -1
3560 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3561 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3562 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3563 {
3564 Elf_Internal_Rela rela;
3565 bfd_byte *loc;
3566
3567 /* This symbol has an entry in the global offset table. Set it
3568 up. */
3569 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3570 abort ();
3571
3572 rela.r_offset = (htab->elf.sgot->output_section->vma
3573 + htab->elf.sgot->output_offset
3574 + (h->got.offset &~ (bfd_vma) 1));
3575
3576 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3577 {
3578 if (bfd_link_pic (info))
3579 {
3580 /* An explicit GOT slot usage needs GLOB_DAT. If the
3581 symbol references local the implicit got.iplt slot
3582 will be used and the IRELATIVE reloc has been created
3583 above. */
3584 goto do_glob_dat;
3585 }
3586 else
3587 {
3588 /* For non-shared objects explicit GOT slots must be
3589 filled with the PLT slot address for pointer
3590 equality reasons. */
3591 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3592 + htab->elf.iplt->output_offset
3593 + h->plt.offset),
3594 htab->elf.sgot->contents + h->got.offset);
3595 return TRUE;
3596 }
3597 }
3598 else if (bfd_link_pic (info)
3599 && SYMBOL_REFERENCES_LOCAL (info, h))
3600 {
3601 /* If this is a static link, or it is a -Bsymbolic link and
3602 the symbol is defined locally or was forced to be local
3603 because of a version file, we just want to emit a
3604 RELATIVE reloc. The entry in the global offset table
3605 will already have been initialized in the
3606 relocate_section function. */
3607 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3608 return FALSE;
3609 BFD_ASSERT((h->got.offset & 1) != 0);
3610 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3611 rela.r_addend = (h->root.u.def.value
3612 + h->root.u.def.section->output_section->vma
3613 + h->root.u.def.section->output_offset);
3614 }
3615 else
3616 {
3617 BFD_ASSERT((h->got.offset & 1) == 0);
3618 do_glob_dat:
3619 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3620 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3621 rela.r_addend = 0;
3622 }
3623
3624 loc = htab->elf.srelgot->contents;
3625 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3626 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3627 }
3628
3629 if (h->needs_copy)
3630 {
3631 Elf_Internal_Rela rela;
3632 asection *s;
3633 bfd_byte *loc;
3634
3635 /* This symbols needs a copy reloc. Set it up. */
3636
3637 if (h->dynindx == -1
3638 || (h->root.type != bfd_link_hash_defined
3639 && h->root.type != bfd_link_hash_defweak)
3640 || htab->elf.srelbss == NULL)
3641 abort ();
3642
3643 rela.r_offset = (h->root.u.def.value
3644 + h->root.u.def.section->output_section->vma
3645 + h->root.u.def.section->output_offset);
3646 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3647 rela.r_addend = 0;
3648 if (h->root.u.def.section == htab->elf.sdynrelro)
3649 s = htab->elf.sreldynrelro;
3650 else
3651 s = htab->elf.srelbss;
3652 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3653 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3654 }
3655
3656 /* Mark some specially defined symbols as absolute. */
3657 if (h == htab->elf.hdynamic
3658 || h == htab->elf.hgot
3659 || h == htab->elf.hplt)
3660 sym->st_shndx = SHN_ABS;
3661
3662 return TRUE;
3663 }
3664
3665 /* Used to decide how to sort relocs in an optimal manner for the
3666 dynamic linker, before writing them out. */
3667
3668 static enum elf_reloc_type_class
3669 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3670 const asection *rel_sec ATTRIBUTE_UNUSED,
3671 const Elf_Internal_Rela *rela)
3672 {
3673 bfd *abfd = info->output_bfd;
3674 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3675 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3676 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3677 Elf_Internal_Sym sym;
3678
3679 if (htab->elf.dynsym == NULL
3680 || !bed->s->swap_symbol_in (abfd,
3681 (htab->elf.dynsym->contents
3682 + r_symndx * bed->s->sizeof_sym),
3683 0, &sym))
3684 abort ();
3685
3686 /* Check relocation against STT_GNU_IFUNC symbol. */
3687 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3688 return reloc_class_ifunc;
3689
3690 switch ((int) ELF64_R_TYPE (rela->r_info))
3691 {
3692 case R_390_RELATIVE:
3693 return reloc_class_relative;
3694 case R_390_JMP_SLOT:
3695 return reloc_class_plt;
3696 case R_390_COPY:
3697 return reloc_class_copy;
3698 default:
3699 return reloc_class_normal;
3700 }
3701 }
3702
3703 /* Finish up the dynamic sections. */
3704
3705 static bfd_boolean
3706 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3707 struct bfd_link_info *info)
3708 {
3709 struct elf_s390_link_hash_table *htab;
3710 bfd *dynobj;
3711 asection *sdyn;
3712 bfd *ibfd;
3713 unsigned int i;
3714
3715 htab = elf_s390_hash_table (info);
3716 if (htab == NULL)
3717 return FALSE;
3718
3719 dynobj = htab->elf.dynobj;
3720 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3721
3722 if (htab->elf.dynamic_sections_created)
3723 {
3724 Elf64_External_Dyn *dyncon, *dynconend;
3725
3726 if (sdyn == NULL || htab->elf.sgot == NULL)
3727 abort ();
3728
3729 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3730 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3731 for (; dyncon < dynconend; dyncon++)
3732 {
3733 Elf_Internal_Dyn dyn;
3734 asection *s;
3735
3736 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3737
3738 switch (dyn.d_tag)
3739 {
3740 default:
3741 continue;
3742
3743 case DT_PLTGOT:
3744 s = htab->elf.sgotplt;
3745 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3746 break;
3747
3748 case DT_JMPREL:
3749 s = htab->elf.srelplt;
3750 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3751 break;
3752
3753 case DT_PLTRELSZ:
3754 dyn.d_un.d_val = htab->elf.srelplt->size;
3755 if (htab->elf.irelplt)
3756 dyn.d_un.d_val += htab->elf.irelplt->size;
3757 break;
3758
3759 case DT_RELASZ:
3760 /* The procedure linkage table relocs (DT_JMPREL) should
3761 not be included in the overall relocs (DT_RELA).
3762 Therefore, we override the DT_RELASZ entry here to
3763 make it not include the JMPREL relocs. Since the
3764 linker script arranges for .rela.plt to follow all
3765 other relocation sections, we don't have to worry
3766 about changing the DT_RELA entry. */
3767 dyn.d_un.d_val -= htab->elf.srelplt->size;
3768 if (htab->elf.irelplt)
3769 dyn.d_un.d_val -= htab->elf.irelplt->size;
3770 break;
3771 }
3772
3773 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3774 }
3775
3776 /* Fill in the special first entry in the procedure linkage table. */
3777 if (htab->elf.splt && htab->elf.splt->size > 0)
3778 {
3779 /* fill in blueprint for plt 0 entry */
3780 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3781 PLT_FIRST_ENTRY_SIZE);
3782 /* Fixup relative address to start of GOT */
3783 bfd_put_32 (output_bfd,
3784 (htab->elf.sgotplt->output_section->vma
3785 + htab->elf.sgotplt->output_offset
3786 - htab->elf.splt->output_section->vma
3787 - htab->elf.splt->output_offset - 6)/2,
3788 htab->elf.splt->contents + 8);
3789 }
3790 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3791 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3792 = PLT_ENTRY_SIZE;
3793 }
3794
3795 if (htab->elf.sgotplt)
3796 {
3797 /* Fill in the first three entries in the global offset table. */
3798 if (htab->elf.sgotplt->size > 0)
3799 {
3800 bfd_put_64 (output_bfd,
3801 (sdyn == NULL ? (bfd_vma) 0
3802 : sdyn->output_section->vma + sdyn->output_offset),
3803 htab->elf.sgotplt->contents);
3804 /* One entry for shared object struct ptr. */
3805 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3806 /* One entry for _dl_runtime_resolve. */
3807 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
3808 }
3809
3810 elf_section_data (htab->elf.sgot->output_section)
3811 ->this_hdr.sh_entsize = 8;
3812 }
3813
3814 /* Finish dynamic symbol for local IFUNC symbols. */
3815 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3816 {
3817 struct plt_entry *local_plt;
3818 Elf_Internal_Sym *isym;
3819 Elf_Internal_Shdr *symtab_hdr;
3820
3821 symtab_hdr = &elf_symtab_hdr (ibfd);
3822
3823 if (!is_s390_elf (ibfd))
3824 continue;
3825
3826 local_plt = elf_s390_local_plt (ibfd);
3827 if (local_plt != NULL)
3828 for (i = 0; i < symtab_hdr->sh_info; i++)
3829 {
3830 if (local_plt[i].plt.offset != (bfd_vma) -1)
3831 {
3832 asection *sec = local_plt[i].sec;
3833 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3834 if (isym == NULL)
3835 return FALSE;
3836
3837 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3838 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3839 local_plt[i].plt.offset,
3840 isym->st_value
3841 + sec->output_section->vma
3842 + sec->output_offset);
3843
3844 }
3845 }
3846 }
3847
3848 return TRUE;
3849 }
3850 \f
3851 /* Support for core dump NOTE sections. */
3852
3853 static bfd_boolean
3854 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3855 {
3856 int offset;
3857 size_t size;
3858
3859 switch (note->descsz)
3860 {
3861 default:
3862 return FALSE;
3863
3864 case 336: /* sizeof(struct elf_prstatus) on s390x */
3865 /* pr_cursig */
3866 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3867
3868 /* pr_pid */
3869 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3870
3871 /* pr_reg */
3872 offset = 112;
3873 size = 216;
3874 break;
3875 }
3876
3877 /* Make a ".reg/999" section. */
3878 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3879 size, note->descpos + offset);
3880 }
3881
3882 static bfd_boolean
3883 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3884 {
3885 switch (note->descsz)
3886 {
3887 default:
3888 return FALSE;
3889
3890 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3891 elf_tdata (abfd)->core->pid
3892 = bfd_get_32 (abfd, note->descdata + 24);
3893 elf_tdata (abfd)->core->program
3894 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3895 elf_tdata (abfd)->core->command
3896 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3897 }
3898
3899 /* Note that for some reason, a spurious space is tacked
3900 onto the end of the args in some (at least one anyway)
3901 implementations, so strip it off if it exists. */
3902
3903 {
3904 char *command = elf_tdata (abfd)->core->command;
3905 int n = strlen (command);
3906
3907 if (0 < n && command[n - 1] == ' ')
3908 command[n - 1] = '\0';
3909 }
3910
3911 return TRUE;
3912 }
3913
3914 static char *
3915 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3916 int note_type, ...)
3917 {
3918 va_list ap;
3919
3920 switch (note_type)
3921 {
3922 default:
3923 return NULL;
3924
3925 case NT_PRPSINFO:
3926 {
3927 char data[136] = { 0 };
3928 const char *fname, *psargs;
3929
3930 va_start (ap, note_type);
3931 fname = va_arg (ap, const char *);
3932 psargs = va_arg (ap, const char *);
3933 va_end (ap);
3934
3935 strncpy (data + 40, fname, 16);
3936 strncpy (data + 56, psargs, 80);
3937 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3938 &data, sizeof (data));
3939 }
3940
3941 case NT_PRSTATUS:
3942 {
3943 char data[336] = { 0 };
3944 long pid;
3945 int cursig;
3946 const void *gregs;
3947
3948 va_start (ap, note_type);
3949 pid = va_arg (ap, long);
3950 cursig = va_arg (ap, int);
3951 gregs = va_arg (ap, const void *);
3952 va_end (ap);
3953
3954 bfd_put_16 (abfd, cursig, data + 12);
3955 bfd_put_32 (abfd, pid, data + 32);
3956 memcpy (data + 112, gregs, 216);
3957 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3958 &data, sizeof (data));
3959 }
3960 }
3961 /* NOTREACHED */
3962 }
3963 \f
3964 /* Return address for Ith PLT stub in section PLT, for relocation REL
3965 or (bfd_vma) -1 if it should not be included. */
3966
3967 static bfd_vma
3968 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3969 const arelent *rel ATTRIBUTE_UNUSED)
3970 {
3971 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3972 }
3973
3974 /* Merge backend specific data from an object file to the output
3975 object file when linking. */
3976
3977 static bfd_boolean
3978 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3979 {
3980 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3981 return TRUE;
3982
3983 return elf_s390_merge_obj_attributes (ibfd, info);
3984 }
3985
3986 /* We may add a PT_S390_PGSTE program header. */
3987
3988 static int
3989 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3990 struct bfd_link_info *info)
3991 {
3992 struct elf_s390_link_hash_table *htab;
3993
3994 if (info)
3995 {
3996 htab = elf_s390_hash_table (info);
3997 if (htab)
3998 return htab->params->pgste;
3999 }
4000 return 0;
4001 }
4002
4003
4004 /* Add the PT_S390_PGSTE program header. */
4005
4006 static bfd_boolean
4007 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
4008 {
4009 struct elf_s390_link_hash_table *htab;
4010 struct elf_segment_map *m, *pm = NULL;
4011
4012 if (!abfd || !info)
4013 return TRUE;
4014
4015 htab = elf_s390_hash_table (info);
4016 if (!htab || !htab->params->pgste)
4017 return TRUE;
4018
4019 /* If there is already a PT_S390_PGSTE header, avoid adding
4020 another. */
4021 m = elf_seg_map (abfd);
4022 while (m && m->p_type != PT_S390_PGSTE)
4023 {
4024 pm = m;
4025 m = m->next;
4026 }
4027
4028 if (m)
4029 return TRUE;
4030
4031 m = (struct elf_segment_map *)
4032 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
4033 if (m == NULL)
4034 return FALSE;
4035 m->p_type = PT_S390_PGSTE;
4036 m->count = 0;
4037 m->next = NULL;
4038 if (pm)
4039 pm->next = m;
4040
4041 return TRUE;
4042 }
4043
4044 bfd_boolean
4045 bfd_elf_s390_set_options (struct bfd_link_info *info,
4046 struct s390_elf_params *params)
4047 {
4048 struct elf_s390_link_hash_table *htab;
4049
4050 if (info)
4051 {
4052 htab = elf_s390_hash_table (info);
4053 if (htab)
4054 htab->params = params;
4055 }
4056
4057 return TRUE;
4058 }
4059
4060
4061 /* Why was the hash table entry size definition changed from
4062 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
4063 this is the only reason for the s390_elf64_size_info structure. */
4064
4065 const struct elf_size_info s390_elf64_size_info =
4066 {
4067 sizeof (Elf64_External_Ehdr),
4068 sizeof (Elf64_External_Phdr),
4069 sizeof (Elf64_External_Shdr),
4070 sizeof (Elf64_External_Rel),
4071 sizeof (Elf64_External_Rela),
4072 sizeof (Elf64_External_Sym),
4073 sizeof (Elf64_External_Dyn),
4074 sizeof (Elf_External_Note),
4075 8, /* hash-table entry size. */
4076 1, /* internal relocations per external relocations. */
4077 64, /* arch_size. */
4078 3, /* log_file_align. */
4079 ELFCLASS64, EV_CURRENT,
4080 bfd_elf64_write_out_phdrs,
4081 bfd_elf64_write_shdrs_and_ehdr,
4082 bfd_elf64_checksum_contents,
4083 bfd_elf64_write_relocs,
4084 bfd_elf64_swap_symbol_in,
4085 bfd_elf64_swap_symbol_out,
4086 bfd_elf64_slurp_reloc_table,
4087 bfd_elf64_slurp_symbol_table,
4088 bfd_elf64_swap_dyn_in,
4089 bfd_elf64_swap_dyn_out,
4090 bfd_elf64_swap_reloc_in,
4091 bfd_elf64_swap_reloc_out,
4092 bfd_elf64_swap_reloca_in,
4093 bfd_elf64_swap_reloca_out
4094 };
4095
4096 #define TARGET_BIG_SYM s390_elf64_vec
4097 #define TARGET_BIG_NAME "elf64-s390"
4098 #define ELF_ARCH bfd_arch_s390
4099 #define ELF_TARGET_ID S390_ELF_DATA
4100 #define ELF_MACHINE_CODE EM_S390
4101 #define ELF_MACHINE_ALT1 EM_S390_OLD
4102 #define ELF_MAXPAGESIZE 0x1000
4103
4104 #define elf_backend_size_info s390_elf64_size_info
4105
4106 #define elf_backend_can_gc_sections 1
4107 #define elf_backend_can_refcount 1
4108 #define elf_backend_want_got_plt 1
4109 #define elf_backend_plt_readonly 1
4110 #define elf_backend_want_plt_sym 0
4111 #define elf_backend_got_header_size 24
4112 #define elf_backend_want_dynrelro 1
4113 #define elf_backend_rela_normal 1
4114
4115 #define elf_info_to_howto elf_s390_info_to_howto
4116
4117 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
4118 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
4119 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4120 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4121 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
4122
4123 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4124 #define elf_backend_check_relocs elf_s390_check_relocs
4125 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4126 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4127 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4128 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4129 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4130 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4131 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4132 #define elf_backend_relocate_section elf_s390_relocate_section
4133 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4134 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4135 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4136 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4137 #define elf_backend_write_core_note elf_s390_write_core_note
4138 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4139 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4140 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4141 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
4142 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
4143
4144 #define bfd_elf64_mkobject elf_s390_mkobject
4145 #define elf_backend_object_p elf_s390_object_p
4146
4147 #include "elf64-target.h"
GDB Binutils - Deliverables
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