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gold: Increment plt_offset after setting TLSDESC PLT entry
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2020 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include "elf-s390.h"
29 #include <stdarg.h>
30
31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33 #define MINUS_ONE (((bfd_vma)0) - 1)
34
35 static bfd_reloc_status_type
36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
37 asection *, bfd *, char **);
38 static bfd_reloc_status_type
39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
40 asection *, bfd *, char **);
41
42 /* The relocation "howto" table. */
43 static reloc_howto_type elf_howto_table[] =
44 {
45 HOWTO (R_390_NONE, /* type */
46 0, /* rightshift */
47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
48 0, /* bitsize */
49 FALSE, /* pc_relative */
50 0, /* bitpos */
51 complain_overflow_dont, /* complain_on_overflow */
52 bfd_elf_generic_reloc, /* special_function */
53 "R_390_NONE", /* name */
54 FALSE, /* partial_inplace */
55 0, /* src_mask */
56 0, /* dst_mask */
57 FALSE), /* pcrel_offset */
58
59 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
75 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
79 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
81 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
83 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
85 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
87 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
99 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
101 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
103 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
105 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
107 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
109 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
111 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
113 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
115 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
123 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
125 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
138 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
140 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
149 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
151 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
154 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
165 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
169 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
173 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
175 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
181 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
183 };
184
185 /* GNU extension to record C++ vtable hierarchy. */
186 static reloc_howto_type elf64_s390_vtinherit_howto =
187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
188 static reloc_howto_type elf64_s390_vtentry_howto =
189 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
190
191 static reloc_howto_type *
192 elf_s390_reloc_type_lookup (bfd *abfd,
193 bfd_reloc_code_real_type code)
194 {
195 switch (code)
196 {
197 case BFD_RELOC_NONE:
198 return &elf_howto_table[(int) R_390_NONE];
199 case BFD_RELOC_8:
200 return &elf_howto_table[(int) R_390_8];
201 case BFD_RELOC_390_12:
202 return &elf_howto_table[(int) R_390_12];
203 case BFD_RELOC_16:
204 return &elf_howto_table[(int) R_390_16];
205 case BFD_RELOC_32:
206 return &elf_howto_table[(int) R_390_32];
207 case BFD_RELOC_CTOR:
208 return &elf_howto_table[(int) R_390_32];
209 case BFD_RELOC_32_PCREL:
210 return &elf_howto_table[(int) R_390_PC32];
211 case BFD_RELOC_390_GOT12:
212 return &elf_howto_table[(int) R_390_GOT12];
213 case BFD_RELOC_32_GOT_PCREL:
214 return &elf_howto_table[(int) R_390_GOT32];
215 case BFD_RELOC_390_PLT32:
216 return &elf_howto_table[(int) R_390_PLT32];
217 case BFD_RELOC_390_COPY:
218 return &elf_howto_table[(int) R_390_COPY];
219 case BFD_RELOC_390_GLOB_DAT:
220 return &elf_howto_table[(int) R_390_GLOB_DAT];
221 case BFD_RELOC_390_JMP_SLOT:
222 return &elf_howto_table[(int) R_390_JMP_SLOT];
223 case BFD_RELOC_390_RELATIVE:
224 return &elf_howto_table[(int) R_390_RELATIVE];
225 case BFD_RELOC_32_GOTOFF:
226 return &elf_howto_table[(int) R_390_GOTOFF32];
227 case BFD_RELOC_390_GOTPC:
228 return &elf_howto_table[(int) R_390_GOTPC];
229 case BFD_RELOC_390_GOT16:
230 return &elf_howto_table[(int) R_390_GOT16];
231 case BFD_RELOC_16_PCREL:
232 return &elf_howto_table[(int) R_390_PC16];
233 case BFD_RELOC_390_PC12DBL:
234 return &elf_howto_table[(int) R_390_PC12DBL];
235 case BFD_RELOC_390_PLT12DBL:
236 return &elf_howto_table[(int) R_390_PLT12DBL];
237 case BFD_RELOC_390_PC16DBL:
238 return &elf_howto_table[(int) R_390_PC16DBL];
239 case BFD_RELOC_390_PLT16DBL:
240 return &elf_howto_table[(int) R_390_PLT16DBL];
241 case BFD_RELOC_390_PC24DBL:
242 return &elf_howto_table[(int) R_390_PC24DBL];
243 case BFD_RELOC_390_PLT24DBL:
244 return &elf_howto_table[(int) R_390_PLT24DBL];
245 case BFD_RELOC_390_PC32DBL:
246 return &elf_howto_table[(int) R_390_PC32DBL];
247 case BFD_RELOC_390_PLT32DBL:
248 return &elf_howto_table[(int) R_390_PLT32DBL];
249 case BFD_RELOC_390_GOTPCDBL:
250 return &elf_howto_table[(int) R_390_GOTPCDBL];
251 case BFD_RELOC_64:
252 return &elf_howto_table[(int) R_390_64];
253 case BFD_RELOC_64_PCREL:
254 return &elf_howto_table[(int) R_390_PC64];
255 case BFD_RELOC_390_GOT64:
256 return &elf_howto_table[(int) R_390_GOT64];
257 case BFD_RELOC_390_PLT64:
258 return &elf_howto_table[(int) R_390_PLT64];
259 case BFD_RELOC_390_GOTENT:
260 return &elf_howto_table[(int) R_390_GOTENT];
261 case BFD_RELOC_16_GOTOFF:
262 return &elf_howto_table[(int) R_390_GOTOFF16];
263 case BFD_RELOC_390_GOTOFF64:
264 return &elf_howto_table[(int) R_390_GOTOFF64];
265 case BFD_RELOC_390_GOTPLT12:
266 return &elf_howto_table[(int) R_390_GOTPLT12];
267 case BFD_RELOC_390_GOTPLT16:
268 return &elf_howto_table[(int) R_390_GOTPLT16];
269 case BFD_RELOC_390_GOTPLT32:
270 return &elf_howto_table[(int) R_390_GOTPLT32];
271 case BFD_RELOC_390_GOTPLT64:
272 return &elf_howto_table[(int) R_390_GOTPLT64];
273 case BFD_RELOC_390_GOTPLTENT:
274 return &elf_howto_table[(int) R_390_GOTPLTENT];
275 case BFD_RELOC_390_PLTOFF16:
276 return &elf_howto_table[(int) R_390_PLTOFF16];
277 case BFD_RELOC_390_PLTOFF32:
278 return &elf_howto_table[(int) R_390_PLTOFF32];
279 case BFD_RELOC_390_PLTOFF64:
280 return &elf_howto_table[(int) R_390_PLTOFF64];
281 case BFD_RELOC_390_TLS_LOAD:
282 return &elf_howto_table[(int) R_390_TLS_LOAD];
283 case BFD_RELOC_390_TLS_GDCALL:
284 return &elf_howto_table[(int) R_390_TLS_GDCALL];
285 case BFD_RELOC_390_TLS_LDCALL:
286 return &elf_howto_table[(int) R_390_TLS_LDCALL];
287 case BFD_RELOC_390_TLS_GD64:
288 return &elf_howto_table[(int) R_390_TLS_GD64];
289 case BFD_RELOC_390_TLS_GOTIE12:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
291 case BFD_RELOC_390_TLS_GOTIE64:
292 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
293 case BFD_RELOC_390_TLS_LDM64:
294 return &elf_howto_table[(int) R_390_TLS_LDM64];
295 case BFD_RELOC_390_TLS_IE64:
296 return &elf_howto_table[(int) R_390_TLS_IE64];
297 case BFD_RELOC_390_TLS_IEENT:
298 return &elf_howto_table[(int) R_390_TLS_IEENT];
299 case BFD_RELOC_390_TLS_LE64:
300 return &elf_howto_table[(int) R_390_TLS_LE64];
301 case BFD_RELOC_390_TLS_LDO64:
302 return &elf_howto_table[(int) R_390_TLS_LDO64];
303 case BFD_RELOC_390_TLS_DTPMOD:
304 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
305 case BFD_RELOC_390_TLS_DTPOFF:
306 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
307 case BFD_RELOC_390_TLS_TPOFF:
308 return &elf_howto_table[(int) R_390_TLS_TPOFF];
309 case BFD_RELOC_390_20:
310 return &elf_howto_table[(int) R_390_20];
311 case BFD_RELOC_390_GOT20:
312 return &elf_howto_table[(int) R_390_GOT20];
313 case BFD_RELOC_390_GOTPLT20:
314 return &elf_howto_table[(int) R_390_GOTPLT20];
315 case BFD_RELOC_390_TLS_GOTIE20:
316 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
317 case BFD_RELOC_390_IRELATIVE:
318 return &elf_howto_table[(int) R_390_IRELATIVE];
319 case BFD_RELOC_VTABLE_INHERIT:
320 return &elf64_s390_vtinherit_howto;
321 case BFD_RELOC_VTABLE_ENTRY:
322 return &elf64_s390_vtentry_howto;
323 default:
324 break;
325 }
326
327 /* xgettext:c-format */
328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
329 bfd_set_error (bfd_error_bad_value);
330 return NULL;
331 }
332
333 static reloc_howto_type *
334 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
335 const char *r_name)
336 {
337 unsigned int i;
338
339 for (i = 0;
340 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
341 i++)
342 if (elf_howto_table[i].name != NULL
343 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
344 return &elf_howto_table[i];
345
346 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
347 return &elf64_s390_vtinherit_howto;
348 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
349 return &elf64_s390_vtentry_howto;
350
351 return NULL;
352 }
353
354 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
355 and elf64-s390.c has its own copy. */
356
357 static bfd_boolean
358 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
359 arelent *cache_ptr,
360 Elf_Internal_Rela *dst)
361 {
362 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
363
364 switch (r_type)
365 {
366 case R_390_GNU_VTINHERIT:
367 cache_ptr->howto = &elf64_s390_vtinherit_howto;
368 break;
369
370 case R_390_GNU_VTENTRY:
371 cache_ptr->howto = &elf64_s390_vtentry_howto;
372 break;
373
374 default:
375 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
376 {
377 /* xgettext:c-format */
378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
379 abfd, r_type);
380 bfd_set_error (bfd_error_bad_value);
381 return FALSE;
382 }
383 cache_ptr->howto = &elf_howto_table[r_type];
384 }
385 return TRUE;
386 }
387
388 /* A relocation function which doesn't do anything. */
389 static bfd_reloc_status_type
390 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
391 arelent *reloc_entry,
392 asymbol *symbol ATTRIBUTE_UNUSED,
393 void * data ATTRIBUTE_UNUSED,
394 asection *input_section,
395 bfd *output_bfd,
396 char **error_message ATTRIBUTE_UNUSED)
397 {
398 if (output_bfd)
399 reloc_entry->address += input_section->output_offset;
400 return bfd_reloc_ok;
401 }
402
403 /* Handle the large displacement relocs. */
404 static bfd_reloc_status_type
405 s390_elf_ldisp_reloc (bfd *abfd,
406 arelent *reloc_entry,
407 asymbol *symbol,
408 void * data,
409 asection *input_section,
410 bfd *output_bfd,
411 char **error_message ATTRIBUTE_UNUSED)
412 {
413 reloc_howto_type *howto = reloc_entry->howto;
414 bfd_vma relocation;
415 bfd_vma insn;
416
417 if (output_bfd != (bfd *) NULL
418 && (symbol->flags & BSF_SECTION_SYM) == 0
419 && (! howto->partial_inplace
420 || reloc_entry->addend == 0))
421 {
422 reloc_entry->address += input_section->output_offset;
423 return bfd_reloc_ok;
424 }
425 if (output_bfd != NULL)
426 return bfd_reloc_continue;
427
428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
429 return bfd_reloc_outofrange;
430
431 relocation = (symbol->value
432 + symbol->section->output_section->vma
433 + symbol->section->output_offset);
434 relocation += reloc_entry->addend;
435 if (howto->pc_relative)
436 {
437 relocation -= (input_section->output_section->vma
438 + input_section->output_offset);
439 relocation -= reloc_entry->address;
440 }
441
442 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
443 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
444 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
445
446 if ((bfd_signed_vma) relocation < - 0x80000
447 || (bfd_signed_vma) relocation > 0x7ffff)
448 return bfd_reloc_overflow;
449 else
450 return bfd_reloc_ok;
451 }
452
453 static bfd_boolean
454 elf_s390_is_local_label_name (bfd *abfd, const char *name)
455 {
456 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
457 return TRUE;
458
459 return _bfd_elf_is_local_label_name (abfd, name);
460 }
461
462 /* Functions for the 390 ELF linker. */
463
464 /* The name of the dynamic interpreter. This is put in the .interp
465 section. */
466
467 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
468
469 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
470 copying dynamic variables from a shared lib into an app's dynbss
471 section, and instead use a dynamic relocation to point into the
472 shared lib. */
473 #define ELIMINATE_COPY_RELOCS 1
474
475 /* The size in bytes of the first entry in the procedure linkage table. */
476 #define PLT_FIRST_ENTRY_SIZE 32
477 /* The size in bytes of an entry in the procedure linkage table. */
478 #define PLT_ENTRY_SIZE 32
479
480 #define GOT_ENTRY_SIZE 8
481
482 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
483
484 /* The first three entries in a global offset table are reserved,
485 and the initial contents are unimportant (we zero them out).
486 Subsequent entries look like this. See the SVR4 ABI 386
487 supplement to see how this works. */
488
489 /* For the s390, simple addr offset can only be 0 - 4096.
490 To use the full 16777216 TB address space, several instructions
491 are needed to load an address in a register and execute
492 a branch( or just saving the address)
493
494 Furthermore, only r 0 and 1 are free to use!!! */
495
496 /* The first 3 words in the GOT are then reserved.
497 Word 0 is the address of the dynamic table.
498 Word 1 is a pointer to a structure describing the object
499 Word 2 is used to point to the loader entry address.
500
501 The code for PLT entries looks like this:
502
503 The GOT holds the address in the PLT to be executed.
504 The loader then gets:
505 48(15) = Pointer to the structure describing the object.
506 56(15) = Offset in symbol table
507 The loader must then find the module where the function is
508 and insert the address in the GOT.
509
510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
511 LG 1,0(1) # 6 bytes Load address from GOT in r1
512 BCR 15,1 # 2 bytes Jump to address
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1
515 BRCL 15,-x # 6 bytes Jump to first PLT entry
516 .long ? # 4 bytes offset into .rela.plt
517
518 Total = 32 bytes per PLT entry
519 Fixup at offset 2: relative address to GOT entry
520 Fixup at offset 22: relative branch to PLT0
521 Fixup at offset 28: 32 bit offset into .rela.plt
522
523 A 32 bit offset into the symbol table is enough. It allows for
524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
525 object (the main program, any shared library) is limited to 4GB in
526 size. Having a .rela.plt of 2GB would already make the .plt
527 section bigger than 8GB. */
528
529 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
530 {
531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
533 0x07, 0xf1, /* br %r1 */
534 0x0d, 0x10, /* basr %r1,%r0 */
535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
538 };
539
540 /* The first PLT entry pushes the offset into the symbol table
541 from R1 onto the stack at 56(15) and the loader object info
542 at 48(15), loads the loader address in R1 and jumps to it. */
543
544 /* The first entry in the PLT:
545
546 PLT0:
547 STG 1,56(15) # r1 contains the offset into the symbol table
548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
550 LG 1,16(1) # get entry address of loader
551 BCR 15,1 # jump to loader
552
553 Fixup at offset 8: relative address to start of GOT. */
554
555 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
556 {
557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
561 0x07, 0xf1, /* br %r1 */
562 0x07, 0x00, /* nopr %r0 */
563 0x07, 0x00, /* nopr %r0 */
564 0x07, 0x00 /* nopr %r0 */
565 };
566
567
568 /* s390 ELF linker hash entry. */
569
570 struct elf_s390_link_hash_entry
571 {
572 struct elf_link_hash_entry elf;
573
574 /* Track dynamic relocs copied for this symbol. */
575 struct elf_dyn_relocs *dyn_relocs;
576
577 /* Number of GOTPLT references for a function. */
578 bfd_signed_vma gotplt_refcount;
579
580 #define GOT_UNKNOWN 0
581 #define GOT_NORMAL 1
582 #define GOT_TLS_GD 2
583 #define GOT_TLS_IE 3
584 #define GOT_TLS_IE_NLT 3
585 unsigned char tls_type;
586
587 /* For pointer equality reasons we might need to change the symbol
588 type from STT_GNU_IFUNC to STT_FUNC together with its value and
589 section entry. So after alloc_dynrelocs only these values should
590 be used. In order to check whether a symbol is IFUNC use
591 s390_is_ifunc_symbol_p. */
592 bfd_vma ifunc_resolver_address;
593 asection *ifunc_resolver_section;
594 };
595
596 #define elf_s390_hash_entry(ent) \
597 ((struct elf_s390_link_hash_entry *)(ent))
598
599 /* This structure represents an entry in the local PLT list needed for
600 local IFUNC symbols. */
601 struct plt_entry
602 {
603 /* The section of the local symbol.
604 Set in relocate_section and used in finish_dynamic_sections. */
605 asection *sec;
606
607 union
608 {
609 bfd_signed_vma refcount;
610 bfd_vma offset;
611 } plt;
612 };
613
614 /* NOTE: Keep this structure in sync with
615 the one declared in elf32-s390.c. */
616 struct elf_s390_obj_tdata
617 {
618 struct elf_obj_tdata root;
619
620 /* A local PLT is needed for ifunc symbols. */
621 struct plt_entry *local_plt;
622
623 /* TLS type for each local got entry. */
624 char *local_got_tls_type;
625 };
626
627 #define elf_s390_tdata(abfd) \
628 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
629
630 #define elf_s390_local_plt(abfd) \
631 (elf_s390_tdata (abfd)->local_plt)
632
633 #define elf_s390_local_got_tls_type(abfd) \
634 (elf_s390_tdata (abfd)->local_got_tls_type)
635
636 #define is_s390_elf(bfd) \
637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
638 && elf_tdata (bfd) != NULL \
639 && elf_object_id (bfd) == S390_ELF_DATA)
640
641 static bfd_boolean
642 elf_s390_mkobject (bfd *abfd)
643 {
644 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
645 S390_ELF_DATA);
646 }
647
648 static bfd_boolean
649 elf_s390_object_p (bfd *abfd)
650 {
651 /* Set the right machine number for an s390 elf32 file. */
652 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
653 }
654
655 /* s390 ELF linker hash table. */
656
657 struct elf_s390_link_hash_table
658 {
659 struct elf_link_hash_table elf;
660
661 /* Short-cuts to get to dynamic linker sections. */
662 asection *irelifunc;
663
664 union {
665 bfd_signed_vma refcount;
666 bfd_vma offset;
667 } tls_ldm_got;
668
669 /* Small local sym cache. */
670 struct sym_cache sym_cache;
671
672 /* Options passed from the linker. */
673 struct s390_elf_params *params;
674 };
675
676 /* Get the s390 ELF linker hash table from a link_info structure. */
677
678 #define elf_s390_hash_table(p) \
679 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
680 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
681
682 #define ELF64 1
683 #include "elf-s390-common.c"
684
685 /* Create an entry in an s390 ELF linker hash table. */
686
687 static struct bfd_hash_entry *
688 link_hash_newfunc (struct bfd_hash_entry *entry,
689 struct bfd_hash_table *table,
690 const char *string)
691 {
692 /* Allocate the structure if it has not already been allocated by a
693 subclass. */
694 if (entry == NULL)
695 {
696 entry = bfd_hash_allocate (table,
697 sizeof (struct elf_s390_link_hash_entry));
698 if (entry == NULL)
699 return entry;
700 }
701
702 /* Call the allocation method of the superclass. */
703 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
704 if (entry != NULL)
705 {
706 struct elf_s390_link_hash_entry *eh;
707
708 eh = (struct elf_s390_link_hash_entry *) entry;
709 eh->dyn_relocs = NULL;
710 eh->gotplt_refcount = 0;
711 eh->tls_type = GOT_UNKNOWN;
712 eh->ifunc_resolver_address = 0;
713 eh->ifunc_resolver_section = NULL;
714 }
715
716 return entry;
717 }
718
719 /* Create an s390 ELF linker hash table. */
720
721 static struct bfd_link_hash_table *
722 elf_s390_link_hash_table_create (bfd *abfd)
723 {
724 struct elf_s390_link_hash_table *ret;
725 size_t amt = sizeof (struct elf_s390_link_hash_table);
726
727 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
728 if (ret == NULL)
729 return NULL;
730
731 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
732 sizeof (struct elf_s390_link_hash_entry),
733 S390_ELF_DATA))
734 {
735 free (ret);
736 return NULL;
737 }
738
739 return &ret->elf.root;
740 }
741
742 /* Copy the extra info we tack onto an elf_link_hash_entry. */
743
744 static void
745 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
746 struct elf_link_hash_entry *dir,
747 struct elf_link_hash_entry *ind)
748 {
749 struct elf_s390_link_hash_entry *edir, *eind;
750
751 edir = (struct elf_s390_link_hash_entry *) dir;
752 eind = (struct elf_s390_link_hash_entry *) ind;
753
754 if (eind->dyn_relocs != NULL)
755 {
756 if (edir->dyn_relocs != NULL)
757 {
758 struct elf_dyn_relocs **pp;
759 struct elf_dyn_relocs *p;
760
761 /* Add reloc counts against the indirect sym to the direct sym
762 list. Merge any entries against the same section. */
763 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
764 {
765 struct elf_dyn_relocs *q;
766
767 for (q = edir->dyn_relocs; q != NULL; q = q->next)
768 if (q->sec == p->sec)
769 {
770 q->pc_count += p->pc_count;
771 q->count += p->count;
772 *pp = p->next;
773 break;
774 }
775 if (q == NULL)
776 pp = &p->next;
777 }
778 *pp = edir->dyn_relocs;
779 }
780
781 edir->dyn_relocs = eind->dyn_relocs;
782 eind->dyn_relocs = NULL;
783 }
784
785 if (ind->root.type == bfd_link_hash_indirect
786 && dir->got.refcount <= 0)
787 {
788 edir->tls_type = eind->tls_type;
789 eind->tls_type = GOT_UNKNOWN;
790 }
791
792 if (ELIMINATE_COPY_RELOCS
793 && ind->root.type != bfd_link_hash_indirect
794 && dir->dynamic_adjusted)
795 {
796 /* If called to transfer flags for a weakdef during processing
797 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
798 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
799 if (dir->versioned != versioned_hidden)
800 dir->ref_dynamic |= ind->ref_dynamic;
801 dir->ref_regular |= ind->ref_regular;
802 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
803 dir->needs_plt |= ind->needs_plt;
804 }
805 else
806 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
807 }
808
809 static int
810 elf_s390_tls_transition (struct bfd_link_info *info,
811 int r_type,
812 int is_local)
813 {
814 if (bfd_link_pic (info))
815 return r_type;
816
817 switch (r_type)
818 {
819 case R_390_TLS_GD64:
820 case R_390_TLS_IE64:
821 if (is_local)
822 return R_390_TLS_LE64;
823 return R_390_TLS_IE64;
824 case R_390_TLS_GOTIE64:
825 if (is_local)
826 return R_390_TLS_LE64;
827 return R_390_TLS_GOTIE64;
828 case R_390_TLS_LDM64:
829 return R_390_TLS_LE64;
830 }
831
832 return r_type;
833 }
834
835 /* Look through the relocs for a section during the first phase, and
836 allocate space in the global offset table or procedure linkage
837 table. */
838
839 static bfd_boolean
840 elf_s390_check_relocs (bfd *abfd,
841 struct bfd_link_info *info,
842 asection *sec,
843 const Elf_Internal_Rela *relocs)
844 {
845 struct elf_s390_link_hash_table *htab;
846 Elf_Internal_Shdr *symtab_hdr;
847 struct elf_link_hash_entry **sym_hashes;
848 const Elf_Internal_Rela *rel;
849 const Elf_Internal_Rela *rel_end;
850 asection *sreloc;
851 bfd_signed_vma *local_got_refcounts;
852 int tls_type, old_tls_type;
853
854 if (bfd_link_relocatable (info))
855 return TRUE;
856
857 BFD_ASSERT (is_s390_elf (abfd));
858
859 htab = elf_s390_hash_table (info);
860 if (htab == NULL)
861 return FALSE;
862
863 symtab_hdr = &elf_symtab_hdr (abfd);
864 sym_hashes = elf_sym_hashes (abfd);
865 local_got_refcounts = elf_local_got_refcounts (abfd);
866
867 sreloc = NULL;
868
869 rel_end = relocs + sec->reloc_count;
870 for (rel = relocs; rel < rel_end; rel++)
871 {
872 unsigned int r_type;
873 unsigned int r_symndx;
874 struct elf_link_hash_entry *h;
875 Elf_Internal_Sym *isym;
876
877 r_symndx = ELF64_R_SYM (rel->r_info);
878
879 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
880 {
881 /* xgettext:c-format */
882 _bfd_error_handler (_("%pB: bad symbol index: %d"),
883 abfd, r_symndx);
884 return FALSE;
885 }
886
887 if (r_symndx < symtab_hdr->sh_info)
888 {
889 /* A local symbol. */
890 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
891 abfd, r_symndx);
892 if (isym == NULL)
893 return FALSE;
894
895 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
896 {
897 struct plt_entry *plt;
898
899 if (htab->elf.dynobj == NULL)
900 htab->elf.dynobj = abfd;
901
902 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
903 return FALSE;
904
905 if (local_got_refcounts == NULL)
906 {
907 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
908 return FALSE;
909 local_got_refcounts = elf_local_got_refcounts (abfd);
910 }
911 plt = elf_s390_local_plt (abfd);
912 plt[r_symndx].plt.refcount++;
913 }
914 h = NULL;
915 }
916 else
917 {
918 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
919 while (h->root.type == bfd_link_hash_indirect
920 || h->root.type == bfd_link_hash_warning)
921 h = (struct elf_link_hash_entry *) h->root.u.i.link;
922 }
923
924 /* Create got section and local_got_refcounts array if they
925 are needed. */
926 r_type = elf_s390_tls_transition (info,
927 ELF64_R_TYPE (rel->r_info),
928 h == NULL);
929 switch (r_type)
930 {
931 case R_390_GOT12:
932 case R_390_GOT16:
933 case R_390_GOT20:
934 case R_390_GOT32:
935 case R_390_GOT64:
936 case R_390_GOTENT:
937 case R_390_GOTPLT12:
938 case R_390_GOTPLT16:
939 case R_390_GOTPLT20:
940 case R_390_GOTPLT32:
941 case R_390_GOTPLT64:
942 case R_390_GOTPLTENT:
943 case R_390_TLS_GD64:
944 case R_390_TLS_GOTIE12:
945 case R_390_TLS_GOTIE20:
946 case R_390_TLS_GOTIE64:
947 case R_390_TLS_IEENT:
948 case R_390_TLS_IE64:
949 case R_390_TLS_LDM64:
950 if (h == NULL
951 && local_got_refcounts == NULL)
952 {
953 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
954 return FALSE;
955 local_got_refcounts = elf_local_got_refcounts (abfd);
956 }
957
958 /* Fall through. */
959 case R_390_GOTOFF16:
960 case R_390_GOTOFF32:
961 case R_390_GOTOFF64:
962 case R_390_GOTPC:
963 case R_390_GOTPCDBL:
964 if (htab->elf.sgot == NULL)
965 {
966 if (htab->elf.dynobj == NULL)
967 htab->elf.dynobj = abfd;
968 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
969 return FALSE;
970 }
971 }
972
973 if (h != NULL)
974 {
975 if (htab->elf.dynobj == NULL)
976 htab->elf.dynobj = abfd;
977 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
978 return FALSE;
979
980 /* Make sure an IFUNC symbol defined in a non-shared object
981 always gets a PLT slot. */
982 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
983 {
984 /* The symbol is called by the dynamic loader in order
985 to resolve the relocation. So it is in fact also
986 referenced. */
987 h->ref_regular = 1;
988 h->needs_plt = 1;
989 }
990 }
991
992 switch (r_type)
993 {
994 case R_390_GOTPC:
995 case R_390_GOTPCDBL:
996 /* These relocs do not need a GOT slot. They just load the
997 GOT pointer itself or address something else relative to
998 the GOT. Since the GOT pointer has been set up above we
999 are done. */
1000 break;
1001 case R_390_GOTOFF16:
1002 case R_390_GOTOFF32:
1003 case R_390_GOTOFF64:
1004 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1005 break;
1006 /* Fall through. */
1007
1008 case R_390_PLT12DBL:
1009 case R_390_PLT16DBL:
1010 case R_390_PLT24DBL:
1011 case R_390_PLT32:
1012 case R_390_PLT32DBL:
1013 case R_390_PLT64:
1014 case R_390_PLTOFF16:
1015 case R_390_PLTOFF32:
1016 case R_390_PLTOFF64:
1017 /* This symbol requires a procedure linkage table entry. We
1018 actually build the entry in adjust_dynamic_symbol,
1019 because this might be a case of linking PIC code which is
1020 never referenced by a dynamic object, in which case we
1021 don't need to generate a procedure linkage table entry
1022 after all. */
1023
1024 /* If this is a local symbol, we resolve it directly without
1025 creating a procedure linkage table entry. */
1026 if (h != NULL)
1027 {
1028 h->needs_plt = 1;
1029 h->plt.refcount += 1;
1030 }
1031 break;
1032
1033 case R_390_GOTPLT12:
1034 case R_390_GOTPLT16:
1035 case R_390_GOTPLT20:
1036 case R_390_GOTPLT32:
1037 case R_390_GOTPLT64:
1038 case R_390_GOTPLTENT:
1039 /* This symbol requires either a procedure linkage table entry
1040 or an entry in the local got. We actually build the entry
1041 in adjust_dynamic_symbol because whether this is really a
1042 global reference can change and with it the fact if we have
1043 to create a plt entry or a local got entry. To be able to
1044 make a once global symbol a local one we have to keep track
1045 of the number of gotplt references that exist for this
1046 symbol. */
1047 if (h != NULL)
1048 {
1049 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1050 h->needs_plt = 1;
1051 h->plt.refcount += 1;
1052 }
1053 else
1054 local_got_refcounts[r_symndx] += 1;
1055 break;
1056
1057 case R_390_TLS_LDM64:
1058 htab->tls_ldm_got.refcount += 1;
1059 break;
1060
1061 case R_390_TLS_IE64:
1062 case R_390_TLS_GOTIE12:
1063 case R_390_TLS_GOTIE20:
1064 case R_390_TLS_GOTIE64:
1065 case R_390_TLS_IEENT:
1066 if (bfd_link_pic (info))
1067 info->flags |= DF_STATIC_TLS;
1068 /* Fall through */
1069
1070 case R_390_GOT12:
1071 case R_390_GOT16:
1072 case R_390_GOT20:
1073 case R_390_GOT32:
1074 case R_390_GOT64:
1075 case R_390_GOTENT:
1076 case R_390_TLS_GD64:
1077 /* This symbol requires a global offset table entry. */
1078 switch (r_type)
1079 {
1080 default:
1081 case R_390_GOT12:
1082 case R_390_GOT16:
1083 case R_390_GOT20:
1084 case R_390_GOT32:
1085 case R_390_GOTENT:
1086 tls_type = GOT_NORMAL;
1087 break;
1088 case R_390_TLS_GD64:
1089 tls_type = GOT_TLS_GD;
1090 break;
1091 case R_390_TLS_IE64:
1092 case R_390_TLS_GOTIE64:
1093 tls_type = GOT_TLS_IE;
1094 break;
1095 case R_390_TLS_GOTIE12:
1096 case R_390_TLS_GOTIE20:
1097 case R_390_TLS_IEENT:
1098 tls_type = GOT_TLS_IE_NLT;
1099 break;
1100 }
1101
1102 if (h != NULL)
1103 {
1104 h->got.refcount += 1;
1105 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1106 }
1107 else
1108 {
1109 local_got_refcounts[r_symndx] += 1;
1110 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1111 }
1112 /* If a TLS symbol is accessed using IE at least once,
1113 there is no point to use dynamic model for it. */
1114 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1115 {
1116 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1117 {
1118 _bfd_error_handler
1119 /* xgettext:c-format */
1120 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1121 abfd, h->root.root.string);
1122 return FALSE;
1123 }
1124 if (old_tls_type > tls_type)
1125 tls_type = old_tls_type;
1126 }
1127
1128 if (old_tls_type != tls_type)
1129 {
1130 if (h != NULL)
1131 elf_s390_hash_entry (h)->tls_type = tls_type;
1132 else
1133 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1134 }
1135
1136 if (r_type != R_390_TLS_IE64)
1137 break;
1138 /* Fall through */
1139
1140 case R_390_TLS_LE64:
1141 /* For static linking and executables this reloc will be
1142 calculated at linktime otherwise a TLS_TPOFF runtime
1143 reloc will be generated. */
1144 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1145 break;
1146
1147 if (!bfd_link_pic (info))
1148 break;
1149 info->flags |= DF_STATIC_TLS;
1150 /* Fall through */
1151
1152 case R_390_8:
1153 case R_390_16:
1154 case R_390_32:
1155 case R_390_64:
1156 case R_390_PC12DBL:
1157 case R_390_PC16:
1158 case R_390_PC16DBL:
1159 case R_390_PC24DBL:
1160 case R_390_PC32:
1161 case R_390_PC32DBL:
1162 case R_390_PC64:
1163 if (h != NULL && bfd_link_executable (info))
1164 {
1165 /* If this reloc is in a read-only section, we might
1166 need a copy reloc. We can't check reliably at this
1167 stage whether the section is read-only, as input
1168 sections have not yet been mapped to output sections.
1169 Tentatively set the flag for now, and correct in
1170 adjust_dynamic_symbol. */
1171 h->non_got_ref = 1;
1172
1173 if (!bfd_link_pic (info))
1174 {
1175 /* We may need a .plt entry if the function this reloc
1176 refers to is in a shared lib. */
1177 h->plt.refcount += 1;
1178 }
1179 }
1180
1181 /* If we are creating a shared library, and this is a reloc
1182 against a global symbol, or a non PC relative reloc
1183 against a local symbol, then we need to copy the reloc
1184 into the shared library. However, if we are linking with
1185 -Bsymbolic, we do not need to copy a reloc against a
1186 global symbol which is defined in an object we are
1187 including in the link (i.e., DEF_REGULAR is set). At
1188 this point we have not seen all the input files, so it is
1189 possible that DEF_REGULAR is not set now but will be set
1190 later (it is never cleared). In case of a weak definition,
1191 DEF_REGULAR may be cleared later by a strong definition in
1192 a shared library. We account for that possibility below by
1193 storing information in the relocs_copied field of the hash
1194 table entry. A similar situation occurs when creating
1195 shared libraries and symbol visibility changes render the
1196 symbol local.
1197
1198 If on the other hand, we are creating an executable, we
1199 may need to keep relocations for symbols satisfied by a
1200 dynamic library if we manage to avoid copy relocs for the
1201 symbol. */
1202 if ((bfd_link_pic (info)
1203 && (sec->flags & SEC_ALLOC) != 0
1204 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1207 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1208 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1209 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1210 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1211 || (h != NULL
1212 && (! SYMBOLIC_BIND (info, h)
1213 || h->root.type == bfd_link_hash_defweak
1214 || !h->def_regular))))
1215 || (ELIMINATE_COPY_RELOCS
1216 && !bfd_link_pic (info)
1217 && (sec->flags & SEC_ALLOC) != 0
1218 && h != NULL
1219 && (h->root.type == bfd_link_hash_defweak
1220 || !h->def_regular)))
1221 {
1222 struct elf_dyn_relocs *p;
1223 struct elf_dyn_relocs **head;
1224
1225 /* We must copy these reloc types into the output file.
1226 Create a reloc section in dynobj and make room for
1227 this reloc. */
1228 if (sreloc == NULL)
1229 {
1230 if (htab->elf.dynobj == NULL)
1231 htab->elf.dynobj = abfd;
1232
1233 sreloc = _bfd_elf_make_dynamic_reloc_section
1234 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1235
1236 if (sreloc == NULL)
1237 return FALSE;
1238 }
1239
1240 /* If this is a global symbol, we count the number of
1241 relocations we need for this symbol. */
1242 if (h != NULL)
1243 {
1244 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1245 }
1246 else
1247 {
1248 /* Track dynamic relocs needed for local syms too.
1249 We really need local syms available to do this
1250 easily. Oh well. */
1251 asection *s;
1252 void *vpp;
1253
1254 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1255 abfd, r_symndx);
1256 if (isym == NULL)
1257 return FALSE;
1258
1259 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1260 if (s == NULL)
1261 s = sec;
1262
1263 vpp = &elf_section_data (s)->local_dynrel;
1264 head = (struct elf_dyn_relocs **) vpp;
1265 }
1266
1267 p = *head;
1268 if (p == NULL || p->sec != sec)
1269 {
1270 size_t amt = sizeof *p;
1271 p = ((struct elf_dyn_relocs *)
1272 bfd_alloc (htab->elf.dynobj, amt));
1273 if (p == NULL)
1274 return FALSE;
1275 p->next = *head;
1276 *head = p;
1277 p->sec = sec;
1278 p->count = 0;
1279 p->pc_count = 0;
1280 }
1281
1282 p->count += 1;
1283 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1284 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1285 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1286 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1287 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1288 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1289 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1290 p->pc_count += 1;
1291 }
1292 break;
1293
1294 /* This relocation describes the C++ object vtable hierarchy.
1295 Reconstruct it for later use during GC. */
1296 case R_390_GNU_VTINHERIT:
1297 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1298 return FALSE;
1299 break;
1300
1301 /* This relocation describes which C++ vtable entries are actually
1302 used. Record for later use during GC. */
1303 case R_390_GNU_VTENTRY:
1304 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1305 return FALSE;
1306 break;
1307
1308 default:
1309 break;
1310 }
1311 }
1312
1313 return TRUE;
1314 }
1315
1316 /* Return the section that should be marked against GC for a given
1317 relocation. */
1318
1319 static asection *
1320 elf_s390_gc_mark_hook (asection *sec,
1321 struct bfd_link_info *info,
1322 Elf_Internal_Rela *rel,
1323 struct elf_link_hash_entry *h,
1324 Elf_Internal_Sym *sym)
1325 {
1326 if (h != NULL)
1327 switch (ELF64_R_TYPE (rel->r_info))
1328 {
1329 case R_390_GNU_VTINHERIT:
1330 case R_390_GNU_VTENTRY:
1331 return NULL;
1332 }
1333
1334 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1335 }
1336
1337 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1338 entry but we found we will not create any. Called when we find we will
1339 not have any PLT for this symbol, by for example
1340 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1341 or elf_s390_size_dynamic_sections if no dynamic sections will be
1342 created (we're only linking static objects). */
1343
1344 static void
1345 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1346 {
1347 if (h->elf.root.type == bfd_link_hash_warning)
1348 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1349
1350 if (h->gotplt_refcount <= 0)
1351 return;
1352
1353 /* We simply add the number of gotplt references to the number
1354 * of got references for this symbol. */
1355 h->elf.got.refcount += h->gotplt_refcount;
1356 h->gotplt_refcount = -1;
1357 }
1358
1359 /* Find dynamic relocs for H that apply to read-only sections. */
1360
1361 static asection *
1362 readonly_dynrelocs (struct elf_link_hash_entry *h)
1363 {
1364 struct elf_dyn_relocs *p;
1365
1366 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1367 {
1368 asection *s = p->sec->output_section;
1369
1370 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1371 return p->sec;
1372 }
1373 return NULL;
1374 }
1375
1376 /* Adjust a symbol defined by a dynamic object and referenced by a
1377 regular object. The current definition is in some section of the
1378 dynamic object, but we're not including those sections. We have to
1379 change the definition to something the rest of the link can
1380 understand. */
1381
1382 static bfd_boolean
1383 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1384 struct elf_link_hash_entry *h)
1385 {
1386 struct elf_s390_link_hash_table *htab;
1387 asection *s, *srel;
1388
1389 /* STT_GNU_IFUNC symbol must go through PLT. */
1390 if (s390_is_ifunc_symbol_p (h))
1391 {
1392 /* All local STT_GNU_IFUNC references must be treated as local
1393 calls via local PLT. */
1394 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1395 {
1396 bfd_size_type pc_count = 0, count = 0;
1397 struct elf_dyn_relocs **pp;
1398 struct elf_s390_link_hash_entry *eh;
1399 struct elf_dyn_relocs *p;
1400
1401 eh = (struct elf_s390_link_hash_entry *) h;
1402 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1403 {
1404 pc_count += p->pc_count;
1405 p->count -= p->pc_count;
1406 p->pc_count = 0;
1407 count += p->count;
1408 if (p->count == 0)
1409 *pp = p->next;
1410 else
1411 pp = &p->next;
1412 }
1413
1414 if (pc_count || count)
1415 {
1416 h->needs_plt = 1;
1417 h->non_got_ref = 1;
1418 if (h->plt.refcount <= 0)
1419 h->plt.refcount = 1;
1420 else
1421 h->plt.refcount += 1;
1422 }
1423 }
1424
1425 if (h->plt.refcount <= 0)
1426 {
1427 h->plt.offset = (bfd_vma) -1;
1428 h->needs_plt = 0;
1429 }
1430 return TRUE;
1431 }
1432
1433 /* If this is a function, put it in the procedure linkage table. We
1434 will fill in the contents of the procedure linkage table later
1435 (although we could actually do it here). */
1436 if (h->type == STT_FUNC
1437 || h->needs_plt)
1438 {
1439 if (h->plt.refcount <= 0
1440 || SYMBOL_CALLS_LOCAL (info, h)
1441 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1442 {
1443 /* This case can occur if we saw a PLT32 reloc in an input
1444 file, but the symbol was never referred to by a dynamic
1445 object, or if all references were garbage collected. In
1446 such a case, we don't actually need to build a procedure
1447 linkage table, and we can just do a PC32 reloc instead. */
1448 h->plt.offset = (bfd_vma) -1;
1449 h->needs_plt = 0;
1450 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1451 }
1452
1453 return TRUE;
1454 }
1455 else
1456 /* It's possible that we incorrectly decided a .plt reloc was
1457 needed for an R_390_PC32 reloc to a non-function sym in
1458 check_relocs. We can't decide accurately between function and
1459 non-function syms in check-relocs; Objects loaded later in
1460 the link may change h->type. So fix it now. */
1461 h->plt.offset = (bfd_vma) -1;
1462
1463 /* If this is a weak symbol, and there is a real definition, the
1464 processor independent code will have arranged for us to see the
1465 real definition first, and we can just use the same value. */
1466 if (h->is_weakalias)
1467 {
1468 struct elf_link_hash_entry *def = weakdef (h);
1469 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1470 h->root.u.def.section = def->root.u.def.section;
1471 h->root.u.def.value = def->root.u.def.value;
1472 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1473 h->non_got_ref = def->non_got_ref;
1474 return TRUE;
1475 }
1476
1477 /* This is a reference to a symbol defined by a dynamic object which
1478 is not a function. */
1479
1480 /* If we are creating a shared library, we must presume that the
1481 only references to the symbol are via the global offset table.
1482 For such cases we need not do anything here; the relocations will
1483 be handled correctly by relocate_section. */
1484 if (bfd_link_pic (info))
1485 return TRUE;
1486
1487 /* If there are no references to this symbol that do not use the
1488 GOT, we don't need to generate a copy reloc. */
1489 if (!h->non_got_ref)
1490 return TRUE;
1491
1492 /* If -z nocopyreloc was given, we won't generate them either. */
1493 if (info->nocopyreloc)
1494 {
1495 h->non_got_ref = 0;
1496 return TRUE;
1497 }
1498
1499 /* If we don't find any dynamic relocs in read-only sections, then
1500 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1501 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1502 {
1503 h->non_got_ref = 0;
1504 return TRUE;
1505 }
1506
1507 /* We must allocate the symbol in our .dynbss section, which will
1508 become part of the .bss section of the executable. There will be
1509 an entry for this symbol in the .dynsym section. The dynamic
1510 object will contain position independent code, so all references
1511 from the dynamic object to this symbol will go through the global
1512 offset table. The dynamic linker will use the .dynsym entry to
1513 determine the address it must put in the global offset table, so
1514 both the dynamic object and the regular object will refer to the
1515 same memory location for the variable. */
1516
1517 htab = elf_s390_hash_table (info);
1518 if (htab == NULL)
1519 return FALSE;
1520
1521 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1522 copy the initial value out of the dynamic object and into the
1523 runtime process image. */
1524 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1525 {
1526 s = htab->elf.sdynrelro;
1527 srel = htab->elf.sreldynrelro;
1528 }
1529 else
1530 {
1531 s = htab->elf.sdynbss;
1532 srel = htab->elf.srelbss;
1533 }
1534 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1535 {
1536 srel->size += sizeof (Elf64_External_Rela);
1537 h->needs_copy = 1;
1538 }
1539
1540 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1541 }
1542
1543 /* Allocate space in .plt, .got and associated reloc sections for
1544 dynamic relocs. */
1545
1546 static bfd_boolean
1547 allocate_dynrelocs (struct elf_link_hash_entry *h,
1548 void * inf)
1549 {
1550 struct bfd_link_info *info;
1551 struct elf_s390_link_hash_table *htab;
1552 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1553 struct elf_dyn_relocs *p;
1554
1555 if (h->root.type == bfd_link_hash_indirect)
1556 return TRUE;
1557
1558 info = (struct bfd_link_info *) inf;
1559 htab = elf_s390_hash_table (info);
1560 if (htab == NULL)
1561 return FALSE;
1562
1563 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1564 here if it is defined and referenced in a non-shared object. */
1565 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1566 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1567 else if (htab->elf.dynamic_sections_created
1568 && h->plt.refcount > 0)
1569 {
1570 /* Make sure this symbol is output as a dynamic symbol.
1571 Undefined weak syms won't yet be marked as dynamic. */
1572 if (h->dynindx == -1
1573 && !h->forced_local)
1574 {
1575 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1576 return FALSE;
1577 }
1578
1579 if (bfd_link_pic (info)
1580 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1581 {
1582 asection *s = htab->elf.splt;
1583
1584 /* If this is the first .plt entry, make room for the special
1585 first entry. */
1586 if (s->size == 0)
1587 s->size += PLT_FIRST_ENTRY_SIZE;
1588
1589 h->plt.offset = s->size;
1590
1591 /* If this symbol is not defined in a regular file, and we are
1592 not generating a shared library, then set the symbol to this
1593 location in the .plt. This is required to make function
1594 pointers compare as equal between the normal executable and
1595 the shared library. */
1596 if (! bfd_link_pic (info)
1597 && !h->def_regular)
1598 {
1599 h->root.u.def.section = s;
1600 h->root.u.def.value = h->plt.offset;
1601 }
1602
1603 /* Make room for this entry. */
1604 s->size += PLT_ENTRY_SIZE;
1605
1606 /* We also need to make an entry in the .got.plt section. */
1607 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1608
1609 /* We also need to make an entry in the .rela.plt section. */
1610 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1611 }
1612 else
1613 {
1614 h->plt.offset = (bfd_vma) -1;
1615 h->needs_plt = 0;
1616 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1617 }
1618 }
1619 else
1620 {
1621 h->plt.offset = (bfd_vma) -1;
1622 h->needs_plt = 0;
1623 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1624 }
1625
1626 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1627 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1628 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1629 we can save the dynamic TLS relocation. */
1630 if (h->got.refcount > 0
1631 && !bfd_link_pic (info)
1632 && h->dynindx == -1
1633 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1634 {
1635 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1636 /* For the GOTIE access without a literal pool entry the offset has
1637 to be stored somewhere. The immediate value in the instruction
1638 is not bit enough so the value is stored in the got. */
1639 {
1640 h->got.offset = htab->elf.sgot->size;
1641 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1642 }
1643 else
1644 h->got.offset = (bfd_vma) -1;
1645 }
1646 else if (h->got.refcount > 0)
1647 {
1648 asection *s;
1649 bfd_boolean dyn;
1650 int tls_type = elf_s390_hash_entry(h)->tls_type;
1651
1652 /* Make sure this symbol is output as a dynamic symbol.
1653 Undefined weak syms won't yet be marked as dynamic. */
1654 if (h->dynindx == -1
1655 && !h->forced_local)
1656 {
1657 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1658 return FALSE;
1659 }
1660
1661 s = htab->elf.sgot;
1662 h->got.offset = s->size;
1663 s->size += GOT_ENTRY_SIZE;
1664 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1665 if (tls_type == GOT_TLS_GD)
1666 s->size += GOT_ENTRY_SIZE;
1667 dyn = htab->elf.dynamic_sections_created;
1668 /* R_390_TLS_IE64 needs one dynamic relocation,
1669 R_390_TLS_GD64 needs one if local symbol and two if global. */
1670 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1671 || tls_type >= GOT_TLS_IE)
1672 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1673 else if (tls_type == GOT_TLS_GD)
1674 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1675 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1676 && (bfd_link_pic (info)
1677 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1678 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1679 }
1680 else
1681 h->got.offset = (bfd_vma) -1;
1682
1683 if (eh->dyn_relocs == NULL)
1684 return TRUE;
1685
1686 /* In the shared -Bsymbolic case, discard space allocated for
1687 dynamic pc-relative relocs against symbols which turn out to be
1688 defined in regular objects. For the normal shared case, discard
1689 space for pc-relative relocs that have become local due to symbol
1690 visibility changes. */
1691
1692 if (bfd_link_pic (info))
1693 {
1694 if (SYMBOL_CALLS_LOCAL (info, h))
1695 {
1696 struct elf_dyn_relocs **pp;
1697
1698 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1699 {
1700 p->count -= p->pc_count;
1701 p->pc_count = 0;
1702 if (p->count == 0)
1703 *pp = p->next;
1704 else
1705 pp = &p->next;
1706 }
1707 }
1708
1709 /* Also discard relocs on undefined weak syms with non-default
1710 visibility. */
1711 if (eh->dyn_relocs != NULL
1712 && h->root.type == bfd_link_hash_undefweak)
1713 {
1714 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1715 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1716 eh->dyn_relocs = NULL;
1717
1718 /* Make sure undefined weak symbols are output as a dynamic
1719 symbol in PIEs. */
1720 else if (h->dynindx == -1
1721 && !h->forced_local)
1722 {
1723 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1724 return FALSE;
1725 }
1726 }
1727 }
1728 else if (ELIMINATE_COPY_RELOCS)
1729 {
1730 /* For the non-shared case, discard space for relocs against
1731 symbols which turn out to need copy relocs or are not
1732 dynamic. */
1733
1734 if (!h->non_got_ref
1735 && ((h->def_dynamic
1736 && !h->def_regular)
1737 || (htab->elf.dynamic_sections_created
1738 && (h->root.type == bfd_link_hash_undefweak
1739 || h->root.type == bfd_link_hash_undefined))))
1740 {
1741 /* Make sure this symbol is output as a dynamic symbol.
1742 Undefined weak syms won't yet be marked as dynamic. */
1743 if (h->dynindx == -1
1744 && !h->forced_local)
1745 {
1746 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1747 return FALSE;
1748 }
1749
1750 /* If that succeeded, we know we'll be keeping all the
1751 relocs. */
1752 if (h->dynindx != -1)
1753 goto keep;
1754 }
1755
1756 eh->dyn_relocs = NULL;
1757
1758 keep: ;
1759 }
1760
1761 /* Finally, allocate space. */
1762 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1763 {
1764 asection *sreloc = elf_section_data (p->sec)->sreloc;
1765 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1766 }
1767
1768 return TRUE;
1769 }
1770
1771 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1772 read-only sections. */
1773
1774 static bfd_boolean
1775 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1776 {
1777 asection *sec;
1778
1779 if (h->root.type == bfd_link_hash_indirect)
1780 return TRUE;
1781
1782 sec = readonly_dynrelocs (h);
1783 if (sec != NULL)
1784 {
1785 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1786
1787 info->flags |= DF_TEXTREL;
1788 info->callbacks->minfo
1789 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1790 sec->owner, h->root.root.string, sec);
1791
1792 /* Not an error, just cut short the traversal. */
1793 return FALSE;
1794 }
1795 return TRUE;
1796 }
1797
1798 /* Set the sizes of the dynamic sections. */
1799
1800 static bfd_boolean
1801 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1802 struct bfd_link_info *info)
1803 {
1804 struct elf_s390_link_hash_table *htab;
1805 bfd *dynobj;
1806 asection *s;
1807 bfd_boolean relocs;
1808 bfd *ibfd;
1809
1810 htab = elf_s390_hash_table (info);
1811 if (htab == NULL)
1812 return FALSE;
1813
1814 dynobj = htab->elf.dynobj;
1815 if (dynobj == NULL)
1816 abort ();
1817
1818 if (htab->elf.dynamic_sections_created)
1819 {
1820 /* Set the contents of the .interp section to the interpreter. */
1821 if (bfd_link_executable (info) && !info->nointerp)
1822 {
1823 s = bfd_get_linker_section (dynobj, ".interp");
1824 if (s == NULL)
1825 abort ();
1826 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1827 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1828 }
1829 }
1830
1831 if (htab->elf.sgot && s390_gotplt_after_got_p (info))
1832 {
1833 /* _bfd_elf_create_got_section adds the got header size always
1834 to .got.plt but we need it in .got if this section comes
1835 first. */
1836 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
1837 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
1838
1839 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1840 instead of .got.plt. */
1841 htab->elf.hgot->root.u.def.section = htab->elf.sgot;
1842 htab->elf.hgot->root.u.def.value = 0;
1843 }
1844
1845 /* Set up .got offsets for local syms, and space for local dynamic
1846 relocs. */
1847 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1848 {
1849 bfd_signed_vma *local_got;
1850 bfd_signed_vma *end_local_got;
1851 char *local_tls_type;
1852 bfd_size_type locsymcount;
1853 Elf_Internal_Shdr *symtab_hdr;
1854 asection *srela;
1855 struct plt_entry *local_plt;
1856 unsigned int i;
1857
1858 if (! is_s390_elf (ibfd))
1859 continue;
1860
1861 for (s = ibfd->sections; s != NULL; s = s->next)
1862 {
1863 struct elf_dyn_relocs *p;
1864
1865 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1866 {
1867 if (!bfd_is_abs_section (p->sec)
1868 && bfd_is_abs_section (p->sec->output_section))
1869 {
1870 /* Input section has been discarded, either because
1871 it is a copy of a linkonce section or due to
1872 linker script /DISCARD/, so we'll be discarding
1873 the relocs too. */
1874 }
1875 else if (p->count != 0)
1876 {
1877 srela = elf_section_data (p->sec)->sreloc;
1878 srela->size += p->count * sizeof (Elf64_External_Rela);
1879 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1880 info->flags |= DF_TEXTREL;
1881 }
1882 }
1883 }
1884
1885 local_got = elf_local_got_refcounts (ibfd);
1886 if (!local_got)
1887 continue;
1888
1889 symtab_hdr = &elf_symtab_hdr (ibfd);
1890 locsymcount = symtab_hdr->sh_info;
1891 end_local_got = local_got + locsymcount;
1892 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1893 s = htab->elf.sgot;
1894 srela = htab->elf.srelgot;
1895 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1896 {
1897 if (*local_got > 0)
1898 {
1899 *local_got = s->size;
1900 s->size += GOT_ENTRY_SIZE;
1901 if (*local_tls_type == GOT_TLS_GD)
1902 s->size += GOT_ENTRY_SIZE;
1903 if (bfd_link_pic (info))
1904 srela->size += sizeof (Elf64_External_Rela);
1905 }
1906 else
1907 *local_got = (bfd_vma) -1;
1908 }
1909
1910 local_plt = elf_s390_local_plt (ibfd);
1911 for (i = 0; i < symtab_hdr->sh_info; i++)
1912 {
1913 if (local_plt[i].plt.refcount > 0)
1914 {
1915 local_plt[i].plt.offset = htab->elf.iplt->size;
1916 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1917 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1918 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1919 }
1920 else
1921 local_plt[i].plt.offset = (bfd_vma) -1;
1922 }
1923 }
1924
1925 if (htab->tls_ldm_got.refcount > 0)
1926 {
1927 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1928 relocs. */
1929 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1930 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1931 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1932 }
1933 else
1934 htab->tls_ldm_got.offset = -1;
1935
1936 /* Allocate global sym .plt and .got entries, and space for global
1937 sym dynamic relocs. */
1938 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1939
1940 /* We now have determined the sizes of the various dynamic sections.
1941 Allocate memory for them. */
1942 relocs = FALSE;
1943 for (s = dynobj->sections; s != NULL; s = s->next)
1944 {
1945 if ((s->flags & SEC_LINKER_CREATED) == 0)
1946 continue;
1947
1948 if (s == htab->elf.splt
1949 || s == htab->elf.sgot
1950 || s == htab->elf.sgotplt
1951 || s == htab->elf.sdynbss
1952 || s == htab->elf.sdynrelro
1953 || s == htab->elf.iplt
1954 || s == htab->elf.igotplt
1955 || s == htab->irelifunc)
1956 {
1957 /* Strip this section if we don't need it; see the
1958 comment below. */
1959 }
1960 else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
1961 {
1962 if (s->size != 0 && s != htab->elf.srelplt)
1963 relocs = TRUE;
1964
1965 /* We use the reloc_count field as a counter if we need
1966 to copy relocs into the output file. */
1967 s->reloc_count = 0;
1968 }
1969 else
1970 {
1971 /* It's not one of our sections, so don't allocate space. */
1972 continue;
1973 }
1974
1975 if (s->size == 0)
1976 {
1977 /* If we don't need this section, strip it from the
1978 output file. This is to handle .rela.bss and
1979 .rela.plt. We must create it in
1980 create_dynamic_sections, because it must be created
1981 before the linker maps input sections to output
1982 sections. The linker does that before
1983 adjust_dynamic_symbol is called, and it is that
1984 function which decides whether anything needs to go
1985 into these sections. */
1986
1987 s->flags |= SEC_EXCLUDE;
1988 continue;
1989 }
1990
1991 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1992 continue;
1993
1994 /* Allocate memory for the section contents. We use bfd_zalloc
1995 here in case unused entries are not reclaimed before the
1996 section's contents are written out. This should not happen,
1997 but this way if it does, we get a R_390_NONE reloc instead
1998 of garbage. */
1999 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2000 if (s->contents == NULL)
2001 return FALSE;
2002 }
2003
2004 if (htab->elf.dynamic_sections_created)
2005 {
2006 /* Add some entries to the .dynamic section. We fill in the
2007 values later, in elf_s390_finish_dynamic_sections, but we
2008 must add the entries now so that we get the correct size for
2009 the .dynamic section. The DT_DEBUG entry is filled in by the
2010 dynamic linker and used by the debugger. */
2011 #define add_dynamic_entry(TAG, VAL) \
2012 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2013
2014 if (bfd_link_executable (info))
2015 {
2016 if (!add_dynamic_entry (DT_DEBUG, 0))
2017 return FALSE;
2018 }
2019
2020 if (htab->elf.splt->size != 0)
2021 {
2022 if (!add_dynamic_entry (DT_PLTGOT, 0)
2023 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2024 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2025 || !add_dynamic_entry (DT_JMPREL, 0))
2026 return FALSE;
2027 }
2028
2029 if (relocs)
2030 {
2031 if (!add_dynamic_entry (DT_RELA, 0)
2032 || !add_dynamic_entry (DT_RELASZ, 0)
2033 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2034 return FALSE;
2035
2036 /* If any dynamic relocs apply to a read-only section,
2037 then we need a DT_TEXTREL entry. */
2038 if ((info->flags & DF_TEXTREL) == 0)
2039 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2040
2041 if ((info->flags & DF_TEXTREL) != 0)
2042 {
2043 if (!add_dynamic_entry (DT_TEXTREL, 0))
2044 return FALSE;
2045 }
2046 }
2047 }
2048 #undef add_dynamic_entry
2049
2050 return TRUE;
2051 }
2052
2053 /* Return the base VMA address which should be subtracted from real addresses
2054 when resolving @dtpoff relocation.
2055 This is PT_TLS segment p_vaddr. */
2056
2057 static bfd_vma
2058 dtpoff_base (struct bfd_link_info *info)
2059 {
2060 /* If tls_sec is NULL, we should have signalled an error already. */
2061 if (elf_hash_table (info)->tls_sec == NULL)
2062 return 0;
2063 return elf_hash_table (info)->tls_sec->vma;
2064 }
2065
2066 /* Return the relocation value for @tpoff relocation
2067 if STT_TLS virtual address is ADDRESS. */
2068
2069 static bfd_vma
2070 tpoff (struct bfd_link_info *info, bfd_vma address)
2071 {
2072 struct elf_link_hash_table *htab = elf_hash_table (info);
2073
2074 /* If tls_sec is NULL, we should have signalled an error already. */
2075 if (htab->tls_sec == NULL)
2076 return 0;
2077 return htab->tls_size + htab->tls_sec->vma - address;
2078 }
2079
2080 /* Complain if TLS instruction relocation is against an invalid
2081 instruction. */
2082
2083 static void
2084 invalid_tls_insn (bfd *input_bfd,
2085 asection *input_section,
2086 Elf_Internal_Rela *rel)
2087 {
2088 reloc_howto_type *howto;
2089
2090 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2091 _bfd_error_handler
2092 /* xgettext:c-format */
2093 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2094 input_bfd,
2095 input_section,
2096 (uint64_t) rel->r_offset,
2097 howto->name);
2098 bfd_set_error (bfd_error_bad_value);
2099 }
2100
2101 /* Relocate a 390 ELF section. */
2102
2103 static bfd_boolean
2104 elf_s390_relocate_section (bfd *output_bfd,
2105 struct bfd_link_info *info,
2106 bfd *input_bfd,
2107 asection *input_section,
2108 bfd_byte *contents,
2109 Elf_Internal_Rela *relocs,
2110 Elf_Internal_Sym *local_syms,
2111 asection **local_sections)
2112 {
2113 struct elf_s390_link_hash_table *htab;
2114 Elf_Internal_Shdr *symtab_hdr;
2115 struct elf_link_hash_entry **sym_hashes;
2116 bfd_vma *local_got_offsets;
2117 Elf_Internal_Rela *rel;
2118 Elf_Internal_Rela *relend;
2119
2120 if (!is_s390_elf (input_bfd))
2121 {
2122 bfd_set_error (bfd_error_wrong_format);
2123 return FALSE;
2124 }
2125
2126 htab = elf_s390_hash_table (info);
2127 if (htab == NULL)
2128 return FALSE;
2129
2130 symtab_hdr = &elf_symtab_hdr (input_bfd);
2131 sym_hashes = elf_sym_hashes (input_bfd);
2132 local_got_offsets = elf_local_got_offsets (input_bfd);
2133
2134 rel = relocs;
2135 relend = relocs + input_section->reloc_count;
2136 for (; rel < relend; rel++)
2137 {
2138 unsigned int r_type;
2139 reloc_howto_type *howto;
2140 unsigned long r_symndx;
2141 struct elf_link_hash_entry *h;
2142 Elf_Internal_Sym *sym;
2143 asection *sec;
2144 bfd_vma off;
2145 bfd_vma relocation;
2146 bfd_boolean unresolved_reloc;
2147 bfd_reloc_status_type r;
2148 int tls_type;
2149 bfd_boolean resolved_to_zero;
2150
2151 r_type = ELF64_R_TYPE (rel->r_info);
2152 if (r_type == (int) R_390_GNU_VTINHERIT
2153 || r_type == (int) R_390_GNU_VTENTRY)
2154 continue;
2155 if (r_type >= (int) R_390_max)
2156 {
2157 bfd_set_error (bfd_error_bad_value);
2158 return FALSE;
2159 }
2160
2161 howto = elf_howto_table + r_type;
2162 r_symndx = ELF64_R_SYM (rel->r_info);
2163
2164 h = NULL;
2165 sym = NULL;
2166 sec = NULL;
2167 unresolved_reloc = FALSE;
2168 if (r_symndx < symtab_hdr->sh_info)
2169 {
2170 sym = local_syms + r_symndx;
2171 sec = local_sections[r_symndx];
2172
2173 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2174 {
2175 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2176 if (local_plt == NULL)
2177 return FALSE;
2178
2179 /* Address of the PLT slot. */
2180 relocation = (htab->elf.iplt->output_section->vma
2181 + htab->elf.iplt->output_offset
2182 + local_plt[r_symndx].plt.offset);
2183
2184 switch (r_type)
2185 {
2186 case R_390_PLTOFF16:
2187 case R_390_PLTOFF32:
2188 case R_390_PLTOFF64:
2189 relocation -= s390_got_pointer (info);
2190 break;
2191 case R_390_GOTPLT12:
2192 case R_390_GOTPLT16:
2193 case R_390_GOTPLT20:
2194 case R_390_GOTPLT32:
2195 case R_390_GOTPLT64:
2196 case R_390_GOTPLTENT:
2197 case R_390_GOT12:
2198 case R_390_GOT16:
2199 case R_390_GOT20:
2200 case R_390_GOT32:
2201 case R_390_GOT64:
2202 case R_390_GOTENT:
2203 {
2204 /* Write the PLT slot address into the GOT slot. */
2205 bfd_put_64 (output_bfd, relocation,
2206 htab->elf.sgot->contents +
2207 local_got_offsets[r_symndx]);
2208 relocation = (local_got_offsets[r_symndx] +
2209 s390_got_offset (info));
2210
2211 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2212 relocation += s390_got_pointer (info);
2213 break;
2214 }
2215 default:
2216 break;
2217 }
2218 /* The output section is needed later in
2219 finish_dynamic_section when creating the dynamic
2220 relocation. */
2221 local_plt[r_symndx].sec = sec;
2222 goto do_relocation;
2223 }
2224 else
2225 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2226 }
2227 else
2228 {
2229 bfd_boolean warned ATTRIBUTE_UNUSED;
2230 bfd_boolean ignored ATTRIBUTE_UNUSED;
2231
2232 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2233 r_symndx, symtab_hdr, sym_hashes,
2234 h, sec, relocation,
2235 unresolved_reloc, warned, ignored);
2236 }
2237
2238 if (sec != NULL && discarded_section (sec))
2239 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2240 rel, 1, relend, howto, 0, contents);
2241
2242 if (bfd_link_relocatable (info))
2243 continue;
2244
2245 resolved_to_zero = (h != NULL
2246 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2247
2248 switch (r_type)
2249 {
2250 case R_390_GOTPLT12:
2251 case R_390_GOTPLT16:
2252 case R_390_GOTPLT20:
2253 case R_390_GOTPLT32:
2254 case R_390_GOTPLT64:
2255 case R_390_GOTPLTENT:
2256 /* There are three cases for a GOTPLT relocation. 1) The
2257 relocation is against the jump slot entry of a plt that
2258 will get emitted to the output file. 2) The relocation
2259 is against the jump slot of a plt entry that has been
2260 removed. elf_s390_adjust_gotplt has created a GOT entry
2261 as replacement. 3) The relocation is against a local symbol.
2262 Cases 2) and 3) are the same as the GOT relocation code
2263 so we just have to test for case 1 and fall through for
2264 the other two. */
2265 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2266 {
2267 bfd_vma plt_index;
2268
2269 if (s390_is_ifunc_symbol_p (h))
2270 {
2271 /* Entry indices of .iplt and .igot.plt match
2272 1:1. No magic PLT first entry here. */
2273 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2274 relocation = (plt_index * GOT_ENTRY_SIZE
2275 + s390_gotplt_offset (info)
2276 + htab->elf.igotplt->output_offset);
2277 }
2278 else
2279 {
2280 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
2281 / PLT_ENTRY_SIZE);
2282
2283 relocation = (plt_index * GOT_ENTRY_SIZE
2284 + s390_gotplt_offset (info));
2285 }
2286 if (r_type == R_390_GOTPLTENT)
2287 relocation += s390_got_pointer (info);
2288 unresolved_reloc = FALSE;
2289 break;
2290 }
2291 /* Fall through. */
2292
2293 case R_390_GOT12:
2294 case R_390_GOT16:
2295 case R_390_GOT20:
2296 case R_390_GOT32:
2297 case R_390_GOT64:
2298 case R_390_GOTENT:
2299 /* Relocation is to the entry for this symbol in the global
2300 offset table. */
2301 if (htab->elf.sgot == NULL)
2302 abort ();
2303
2304 if (h != NULL)
2305 {
2306 bfd_boolean dyn;
2307
2308 off = h->got.offset;
2309 dyn = htab->elf.dynamic_sections_created;
2310
2311 if (s390_is_ifunc_symbol_p (h))
2312 {
2313 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2314 if (off == (bfd_vma)-1)
2315 {
2316 /* No explicit GOT usage so redirect to the
2317 got.iplt slot. */
2318 relocation = (s390_gotplt_offset (info)
2319 + htab->elf.igotplt->output_offset
2320 + (h->plt.offset / PLT_ENTRY_SIZE
2321 * GOT_ENTRY_SIZE));
2322
2323 /* For @GOTENT the relocation is against the offset between
2324 the instruction and the symbols entry in the GOT and not
2325 between the start of the GOT and the symbols entry. We
2326 add the vma of the GOT to get the correct value. */
2327 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2328 relocation += s390_got_pointer (info);
2329
2330 break;
2331 }
2332 else
2333 {
2334 /* Explicit GOT slots must contain the address
2335 of the PLT slot. This will be handled in
2336 finish_dynamic_symbol. */
2337 }
2338 }
2339 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2340 bfd_link_pic (info),
2341 h)
2342 || (bfd_link_pic (info)
2343 && SYMBOL_REFERENCES_LOCAL (info, h))
2344 || resolved_to_zero)
2345 {
2346 Elf_Internal_Sym *isym;
2347 asection *sym_sec;
2348
2349 /* This is actually a static link, or it is a
2350 -Bsymbolic link and the symbol is defined
2351 locally, or the symbol was forced to be local
2352 because of a version file. We must initialize
2353 this entry in the global offset table. Since the
2354 offset must always be a multiple of 2, we use the
2355 least significant bit to record whether we have
2356 initialized it already.
2357
2358 When doing a dynamic link, we create a .rel.got
2359 relocation entry to initialize the value. This
2360 is done in the finish_dynamic_symbol routine. */
2361 if ((off & 1) != 0)
2362 off &= ~1;
2363 else
2364 {
2365 bfd_put_64 (output_bfd, relocation,
2366 htab->elf.sgot->contents + off);
2367 h->got.offset |= 1;
2368 }
2369
2370 /* When turning a GOT slot dereference into a direct
2371 reference using larl we have to make sure that
2372 the symbol is 1. properly aligned and 2. it is no
2373 ABS symbol or will become one. */
2374 if ((h->def_regular
2375 && bfd_link_pic (info)
2376 && SYMBOL_REFERENCES_LOCAL (info, h))
2377 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2378 && ((r_type == R_390_GOTENT
2379 && (bfd_get_16 (input_bfd,
2380 contents + rel->r_offset - 2)
2381 & 0xff0f) == 0xc408)
2382 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2383 || (r_type == R_390_GOT20
2384 && (bfd_get_32 (input_bfd,
2385 contents + rel->r_offset - 2)
2386 & 0xff00f000) == 0xe300c000
2387 && bfd_get_8 (input_bfd,
2388 contents + rel->r_offset + 3) == 0x04))
2389 && (isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2390 input_bfd, r_symndx))
2391 && isym->st_shndx != SHN_ABS
2392 && h != htab->elf.hdynamic
2393 && h != htab->elf.hgot
2394 && h != htab->elf.hplt
2395 && !(isym->st_value & 1)
2396 && (sym_sec = bfd_section_from_elf_index (input_bfd,
2397 isym->st_shndx))
2398 && sym_sec->alignment_power)
2399 {
2400 unsigned short new_insn =
2401 (0xc000 | (bfd_get_8 (input_bfd,
2402 contents + rel->r_offset - 1) & 0xf0));
2403 bfd_put_16 (output_bfd, new_insn,
2404 contents + rel->r_offset - 2);
2405 r_type = R_390_PC32DBL;
2406 rel->r_addend = 2;
2407 howto = elf_howto_table + r_type;
2408 relocation = h->root.u.def.value
2409 + h->root.u.def.section->output_section->vma
2410 + h->root.u.def.section->output_offset;
2411 goto do_relocation;
2412 }
2413 }
2414 else
2415 unresolved_reloc = FALSE;
2416 }
2417 else
2418 {
2419 if (local_got_offsets == NULL)
2420 abort ();
2421
2422 off = local_got_offsets[r_symndx];
2423
2424 /* The offset must always be a multiple of 8. We use
2425 the least significant bit to record whether we have
2426 already generated the necessary reloc. */
2427 if ((off & 1) != 0)
2428 off &= ~1;
2429 else
2430 {
2431 bfd_put_64 (output_bfd, relocation,
2432 htab->elf.sgot->contents + off);
2433
2434 if (bfd_link_pic (info))
2435 {
2436 asection *s;
2437 Elf_Internal_Rela outrel;
2438 bfd_byte *loc;
2439
2440 s = htab->elf.srelgot;
2441 if (s == NULL)
2442 abort ();
2443
2444 outrel.r_offset = (htab->elf.sgot->output_section->vma
2445 + htab->elf.sgot->output_offset
2446 + off);
2447 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2448 outrel.r_addend = relocation;
2449 loc = s->contents;
2450 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2451 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2452 }
2453
2454 local_got_offsets[r_symndx] |= 1;
2455 }
2456 }
2457
2458 if (off >= (bfd_vma) -2)
2459 abort ();
2460
2461 relocation = s390_got_offset (info) + off;
2462
2463 /* For @GOTENT the relocation is against the offset between
2464 the instruction and the symbols entry in the GOT and not
2465 between the start of the GOT and the symbols entry. We
2466 add the vma of the GOT to get the correct value. */
2467 if ( r_type == R_390_GOTENT
2468 || r_type == R_390_GOTPLTENT)
2469 relocation += s390_got_pointer (info);
2470
2471 break;
2472
2473 case R_390_GOTOFF16:
2474 case R_390_GOTOFF32:
2475 case R_390_GOTOFF64:
2476 /* Relocation is relative to the start of the global offset
2477 table. */
2478
2479 if (h != NULL
2480 && s390_is_ifunc_symbol_p (h)
2481 && h->def_regular
2482 && !bfd_link_executable (info))
2483 {
2484 relocation = (htab->elf.iplt->output_section->vma
2485 + htab->elf.iplt->output_offset
2486 + h->plt.offset
2487 - s390_got_pointer (info));
2488 goto do_relocation;
2489 }
2490
2491 relocation -= s390_got_pointer (info);
2492 break;
2493
2494 case R_390_GOTPC:
2495 case R_390_GOTPCDBL:
2496 /* Use global offset table as symbol value. */
2497 relocation = s390_got_pointer (info);
2498 unresolved_reloc = FALSE;
2499 break;
2500
2501 case R_390_PLT12DBL:
2502 case R_390_PLT16DBL:
2503 case R_390_PLT24DBL:
2504 case R_390_PLT32:
2505 case R_390_PLT32DBL:
2506 case R_390_PLT64:
2507 /* Relocation is to the entry for this symbol in the
2508 procedure linkage table. */
2509
2510 /* Resolve a PLT32 reloc against a local symbol directly,
2511 without using the procedure linkage table. */
2512 if (h == NULL)
2513 break;
2514
2515 if (h->plt.offset == (bfd_vma) -1
2516 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2517 {
2518 /* We didn't make a PLT entry for this symbol. This
2519 happens when statically linking PIC code, or when
2520 using -Bsymbolic. */
2521 break;
2522 }
2523 if (s390_is_ifunc_symbol_p (h))
2524 relocation = (htab->elf.iplt->output_section->vma
2525 + htab->elf.iplt->output_offset
2526 + h->plt.offset);
2527 else
2528 relocation = (htab->elf.splt->output_section->vma
2529 + htab->elf.splt->output_offset
2530 + h->plt.offset);
2531 unresolved_reloc = FALSE;
2532 break;
2533
2534 case R_390_PLTOFF16:
2535 case R_390_PLTOFF32:
2536 case R_390_PLTOFF64:
2537 /* Relocation is to the entry for this symbol in the
2538 procedure linkage table relative to the start of the GOT. */
2539
2540 /* For local symbols or if we didn't make a PLT entry for
2541 this symbol resolve the symbol directly. */
2542 if (h == NULL
2543 || h->plt.offset == (bfd_vma) -1
2544 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2545 {
2546 relocation -= s390_got_pointer (info);
2547 break;
2548 }
2549
2550 if (s390_is_ifunc_symbol_p (h))
2551 relocation = (htab->elf.iplt->output_section->vma
2552 + htab->elf.iplt->output_offset
2553 + h->plt.offset
2554 - s390_got_pointer (info));
2555 else
2556 relocation = (htab->elf.splt->output_section->vma
2557 + htab->elf.splt->output_offset
2558 + h->plt.offset
2559 - s390_got_pointer (info));
2560 unresolved_reloc = FALSE;
2561 break;
2562
2563 case R_390_PC16:
2564 case R_390_PC12DBL:
2565 case R_390_PC16DBL:
2566 case R_390_PC24DBL:
2567 case R_390_PC32:
2568 case R_390_PC32DBL:
2569 case R_390_PC64:
2570 if (h != NULL
2571 && bfd_link_pie (info)
2572 && !h->def_regular)
2573 {
2574 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2575 "in shared library and accessed "
2576 "from executable "
2577 "(rebuild file with -fPIC ?)"),
2578 input_bfd, h->root.root.string);
2579 bfd_set_error (bfd_error_bad_value);
2580 return FALSE;
2581 }
2582 /* The target of these relocs are instruction operands
2583 residing in read-only sections. We cannot emit a runtime
2584 reloc for it. */
2585 if (h != NULL
2586 && s390_is_ifunc_symbol_p (h)
2587 && h->def_regular
2588 && bfd_link_pic (info))
2589 {
2590 relocation = (htab->elf.iplt->output_section->vma
2591 + htab->elf.iplt->output_offset
2592 + h->plt.offset);
2593 goto do_relocation;
2594 }
2595 /* Fall through. */
2596
2597 case R_390_8:
2598 case R_390_16:
2599 case R_390_32:
2600 case R_390_64:
2601
2602 if ((input_section->flags & SEC_ALLOC) == 0)
2603 break;
2604
2605 if (h != NULL
2606 && s390_is_ifunc_symbol_p (h)
2607 && h->def_regular)
2608 {
2609 if (!bfd_link_pic (info))
2610 {
2611 /* For a non-shared object the symbol will not
2612 change. Hence we can write the address of the
2613 target IPLT slot now. */
2614 relocation = (htab->elf.iplt->output_section->vma
2615 + htab->elf.iplt->output_offset
2616 + h ->plt.offset);
2617 goto do_relocation;
2618 }
2619 else
2620 {
2621 /* For shared objects a runtime relocation is needed. */
2622
2623 Elf_Internal_Rela outrel;
2624 asection *sreloc;
2625
2626 /* Need a dynamic relocation to get the real function
2627 address. */
2628 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2629 info,
2630 input_section,
2631 rel->r_offset);
2632 if (outrel.r_offset == (bfd_vma) -1
2633 || outrel.r_offset == (bfd_vma) -2)
2634 abort ();
2635
2636 outrel.r_offset += (input_section->output_section->vma
2637 + input_section->output_offset);
2638
2639 if (h->dynindx == -1
2640 || h->forced_local
2641 || bfd_link_executable (info))
2642 {
2643 /* This symbol is resolved locally. */
2644 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2645 outrel.r_addend = (h->root.u.def.value
2646 + h->root.u.def.section->output_section->vma
2647 + h->root.u.def.section->output_offset);
2648 }
2649 else
2650 {
2651 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2652 outrel.r_addend = 0;
2653 }
2654
2655 sreloc = htab->elf.irelifunc;
2656 elf_append_rela (output_bfd, sreloc, &outrel);
2657
2658 /* If this reloc is against an external symbol, we
2659 do not want to fiddle with the addend. Otherwise,
2660 we need to include the symbol value so that it
2661 becomes an addend for the dynamic reloc. For an
2662 internal symbol, we have updated addend. */
2663 continue;
2664 }
2665 }
2666
2667 if ((bfd_link_pic (info)
2668 && (h == NULL
2669 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2670 && !resolved_to_zero)
2671 || h->root.type != bfd_link_hash_undefweak)
2672 && ((r_type != R_390_PC16
2673 && r_type != R_390_PC12DBL
2674 && r_type != R_390_PC16DBL
2675 && r_type != R_390_PC24DBL
2676 && r_type != R_390_PC32
2677 && r_type != R_390_PC32DBL
2678 && r_type != R_390_PC64)
2679 || !SYMBOL_CALLS_LOCAL (info, h)))
2680 || (ELIMINATE_COPY_RELOCS
2681 && !bfd_link_pic (info)
2682 && h != NULL
2683 && h->dynindx != -1
2684 && !h->non_got_ref
2685 && ((h->def_dynamic
2686 && !h->def_regular)
2687 || h->root.type == bfd_link_hash_undefweak
2688 || h->root.type == bfd_link_hash_undefined)))
2689 {
2690 Elf_Internal_Rela outrel;
2691 bfd_boolean skip, relocate;
2692 asection *sreloc;
2693 bfd_byte *loc;
2694
2695 /* When generating a shared object, these relocations
2696 are copied into the output file to be resolved at run
2697 time. */
2698 skip = FALSE;
2699 relocate = FALSE;
2700
2701 outrel.r_offset =
2702 _bfd_elf_section_offset (output_bfd, info, input_section,
2703 rel->r_offset);
2704 if (outrel.r_offset == (bfd_vma) -1)
2705 skip = TRUE;
2706 else if (outrel.r_offset == (bfd_vma) -2)
2707 skip = TRUE, relocate = TRUE;
2708
2709 outrel.r_offset += (input_section->output_section->vma
2710 + input_section->output_offset);
2711
2712 if (skip)
2713 memset (&outrel, 0, sizeof outrel);
2714 else if (h != NULL
2715 && h->dynindx != -1
2716 && (r_type == R_390_PC16
2717 || r_type == R_390_PC12DBL
2718 || r_type == R_390_PC16DBL
2719 || r_type == R_390_PC24DBL
2720 || r_type == R_390_PC32
2721 || r_type == R_390_PC32DBL
2722 || r_type == R_390_PC64
2723 || !bfd_link_pic (info)
2724 || !SYMBOLIC_BIND (info, h)
2725 || !h->def_regular))
2726 {
2727 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2728 outrel.r_addend = rel->r_addend;
2729 }
2730 else
2731 {
2732 /* This symbol is local, or marked to become local. */
2733 outrel.r_addend = relocation + rel->r_addend;
2734 if (r_type == R_390_64)
2735 {
2736 relocate = TRUE;
2737 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2738 }
2739 else
2740 {
2741 long sindx;
2742
2743 if (bfd_is_abs_section (sec))
2744 sindx = 0;
2745 else if (sec == NULL || sec->owner == NULL)
2746 {
2747 bfd_set_error(bfd_error_bad_value);
2748 return FALSE;
2749 }
2750 else
2751 {
2752 asection *osec;
2753
2754 osec = sec->output_section;
2755 sindx = elf_section_data (osec)->dynindx;
2756
2757 if (sindx == 0)
2758 {
2759 osec = htab->elf.text_index_section;
2760 sindx = elf_section_data (osec)->dynindx;
2761 }
2762 BFD_ASSERT (sindx != 0);
2763
2764 /* We are turning this relocation into one
2765 against a section symbol, so subtract out
2766 the output section's address but not the
2767 offset of the input section in the output
2768 section. */
2769 outrel.r_addend -= osec->vma;
2770 }
2771 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2772 }
2773 }
2774
2775 sreloc = elf_section_data (input_section)->sreloc;
2776 if (sreloc == NULL)
2777 abort ();
2778
2779 loc = sreloc->contents;
2780 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2781 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2782
2783 /* If this reloc is against an external symbol, we do
2784 not want to fiddle with the addend. Otherwise, we
2785 need to include the symbol value so that it becomes
2786 an addend for the dynamic reloc. */
2787 if (! relocate)
2788 continue;
2789 }
2790
2791 break;
2792
2793 /* Relocations for tls literal pool entries. */
2794 case R_390_TLS_IE64:
2795 if (bfd_link_pic (info))
2796 {
2797 Elf_Internal_Rela outrel;
2798 asection *sreloc;
2799 bfd_byte *loc;
2800
2801 outrel.r_offset = rel->r_offset
2802 + input_section->output_section->vma
2803 + input_section->output_offset;
2804 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2805 sreloc = elf_section_data (input_section)->sreloc;
2806 if (sreloc == NULL)
2807 abort ();
2808 loc = sreloc->contents;
2809 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2810 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2811 }
2812 /* Fall through. */
2813
2814 case R_390_TLS_GD64:
2815 case R_390_TLS_GOTIE64:
2816 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2817 tls_type = GOT_UNKNOWN;
2818 if (h == NULL && local_got_offsets)
2819 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2820 else if (h != NULL)
2821 {
2822 tls_type = elf_s390_hash_entry(h)->tls_type;
2823 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2824 r_type = R_390_TLS_LE64;
2825 }
2826 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2827 r_type = R_390_TLS_IE64;
2828
2829 if (r_type == R_390_TLS_LE64)
2830 {
2831 /* This relocation gets optimized away by the local exec
2832 access optimization. */
2833 BFD_ASSERT (! unresolved_reloc);
2834 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2835 contents + rel->r_offset);
2836 continue;
2837 }
2838
2839 if (htab->elf.sgot == NULL)
2840 abort ();
2841
2842 if (h != NULL)
2843 off = h->got.offset;
2844 else
2845 {
2846 if (local_got_offsets == NULL)
2847 abort ();
2848
2849 off = local_got_offsets[r_symndx];
2850 }
2851
2852 emit_tls_relocs:
2853
2854 if ((off & 1) != 0)
2855 off &= ~1;
2856 else
2857 {
2858 Elf_Internal_Rela outrel;
2859 bfd_byte *loc;
2860 int dr_type, indx;
2861
2862 if (htab->elf.srelgot == NULL)
2863 abort ();
2864
2865 outrel.r_offset = (htab->elf.sgot->output_section->vma
2866 + htab->elf.sgot->output_offset + off);
2867
2868 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2869 if (r_type == R_390_TLS_GD64)
2870 dr_type = R_390_TLS_DTPMOD;
2871 else
2872 dr_type = R_390_TLS_TPOFF;
2873 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2874 outrel.r_addend = relocation - dtpoff_base (info);
2875 else
2876 outrel.r_addend = 0;
2877 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2878 loc = htab->elf.srelgot->contents;
2879 loc += htab->elf.srelgot->reloc_count++
2880 * sizeof (Elf64_External_Rela);
2881 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2882
2883 if (r_type == R_390_TLS_GD64)
2884 {
2885 if (indx == 0)
2886 {
2887 BFD_ASSERT (! unresolved_reloc);
2888 bfd_put_64 (output_bfd,
2889 relocation - dtpoff_base (info),
2890 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2891 }
2892 else
2893 {
2894 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2895 outrel.r_offset += GOT_ENTRY_SIZE;
2896 outrel.r_addend = 0;
2897 htab->elf.srelgot->reloc_count++;
2898 loc += sizeof (Elf64_External_Rela);
2899 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2900 }
2901 }
2902
2903 if (h != NULL)
2904 h->got.offset |= 1;
2905 else
2906 local_got_offsets[r_symndx] |= 1;
2907 }
2908
2909 if (off >= (bfd_vma) -2)
2910 abort ();
2911 if (r_type == ELF64_R_TYPE (rel->r_info))
2912 {
2913 relocation = htab->elf.sgot->output_offset + off;
2914 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2915 relocation += htab->elf.sgot->output_section->vma;
2916 unresolved_reloc = FALSE;
2917 }
2918 else
2919 {
2920 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2921 contents + rel->r_offset);
2922 continue;
2923 }
2924 break;
2925
2926 case R_390_TLS_GOTIE12:
2927 case R_390_TLS_GOTIE20:
2928 case R_390_TLS_IEENT:
2929 if (h == NULL)
2930 {
2931 if (local_got_offsets == NULL)
2932 abort();
2933 off = local_got_offsets[r_symndx];
2934 if (bfd_link_pic (info))
2935 goto emit_tls_relocs;
2936 }
2937 else
2938 {
2939 off = h->got.offset;
2940 tls_type = elf_s390_hash_entry(h)->tls_type;
2941 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2942 goto emit_tls_relocs;
2943 }
2944
2945 if (htab->elf.sgot == NULL)
2946 abort ();
2947
2948 BFD_ASSERT (! unresolved_reloc);
2949 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2950 htab->elf.sgot->contents + off);
2951 relocation = htab->elf.sgot->output_offset + off;
2952 if (r_type == R_390_TLS_IEENT)
2953 relocation += htab->elf.sgot->output_section->vma;
2954 unresolved_reloc = FALSE;
2955 break;
2956
2957 case R_390_TLS_LDM64:
2958 if (! bfd_link_pic (info))
2959 /* The literal pool entry this relocation refers to gets ignored
2960 by the optimized code of the local exec model. Do nothing
2961 and the value will turn out zero. */
2962 continue;
2963
2964 if (htab->elf.sgot == NULL)
2965 abort ();
2966
2967 off = htab->tls_ldm_got.offset;
2968 if (off & 1)
2969 off &= ~1;
2970 else
2971 {
2972 Elf_Internal_Rela outrel;
2973 bfd_byte *loc;
2974
2975 if (htab->elf.srelgot == NULL)
2976 abort ();
2977
2978 outrel.r_offset = (htab->elf.sgot->output_section->vma
2979 + htab->elf.sgot->output_offset + off);
2980
2981 bfd_put_64 (output_bfd, 0,
2982 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2983 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2984 outrel.r_addend = 0;
2985 loc = htab->elf.srelgot->contents;
2986 loc += htab->elf.srelgot->reloc_count++
2987 * sizeof (Elf64_External_Rela);
2988 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2989 htab->tls_ldm_got.offset |= 1;
2990 }
2991 relocation = htab->elf.sgot->output_offset + off;
2992 unresolved_reloc = FALSE;
2993 break;
2994
2995 case R_390_TLS_LE64:
2996 if (bfd_link_dll (info))
2997 {
2998 /* Linking a shared library with non-fpic code requires
2999 a R_390_TLS_TPOFF relocation. */
3000 Elf_Internal_Rela outrel;
3001 asection *sreloc;
3002 bfd_byte *loc;
3003 int indx;
3004
3005 outrel.r_offset = rel->r_offset
3006 + input_section->output_section->vma
3007 + input_section->output_offset;
3008 if (h != NULL && h->dynindx != -1)
3009 indx = h->dynindx;
3010 else
3011 indx = 0;
3012 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3013 if (indx == 0)
3014 outrel.r_addend = relocation - dtpoff_base (info);
3015 else
3016 outrel.r_addend = 0;
3017 sreloc = elf_section_data (input_section)->sreloc;
3018 if (sreloc == NULL)
3019 abort ();
3020 loc = sreloc->contents;
3021 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3022 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3023 }
3024 else
3025 {
3026 BFD_ASSERT (! unresolved_reloc);
3027 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3028 contents + rel->r_offset);
3029 }
3030 continue;
3031
3032 case R_390_TLS_LDO64:
3033 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3034 relocation -= dtpoff_base (info);
3035 else
3036 /* When converting LDO to LE, we must negate. */
3037 relocation = -tpoff (info, relocation);
3038 break;
3039
3040 /* Relocations for tls instructions. */
3041 case R_390_TLS_LOAD:
3042 case R_390_TLS_GDCALL:
3043 case R_390_TLS_LDCALL:
3044 tls_type = GOT_UNKNOWN;
3045 if (h == NULL && local_got_offsets)
3046 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3047 else if (h != NULL)
3048 tls_type = elf_s390_hash_entry(h)->tls_type;
3049
3050 if (tls_type == GOT_TLS_GD)
3051 continue;
3052
3053 if (r_type == R_390_TLS_LOAD)
3054 {
3055 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3056 {
3057 /* IE->LE transition. Four valid cases:
3058 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3059 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3060 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3061 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3062 unsigned int insn0, insn1, ry;
3063
3064 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3065 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3066 if (insn1 != 0x0004)
3067 {
3068 invalid_tls_insn (input_bfd, input_section, rel);
3069 return FALSE;
3070 }
3071 if ((insn0 & 0xff00f000) == 0xe3000000)
3072 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3073 ry = (insn0 & 0x000f0000);
3074 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3075 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3076 ry = (insn0 & 0x0000f000) << 4;
3077 else if ((insn0 & 0xff00f000) == 0xe300c000)
3078 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3079 ry = (insn0 & 0x000f0000);
3080 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3081 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3082 ry = (insn0 & 0x0000f000) << 4;
3083 else
3084 {
3085 invalid_tls_insn (input_bfd, input_section, rel);
3086 return FALSE;
3087 }
3088 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3089 insn1 = 0x000d;
3090 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3091 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3092 }
3093 }
3094 else if (r_type == R_390_TLS_GDCALL)
3095 {
3096 unsigned int insn0, insn1;
3097
3098 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3099 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3100 if ((insn0 & 0xffff0000) != 0xc0e50000)
3101 {
3102 invalid_tls_insn (input_bfd, input_section, rel);
3103 return FALSE;
3104 }
3105 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3106 {
3107 /* GD->LE transition.
3108 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3109 insn0 = 0xc0040000;
3110 insn1 = 0x0000;
3111 }
3112 else
3113 {
3114 /* GD->IE transition.
3115 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3116 insn0 = 0xe322c000;
3117 insn1 = 0x0004;
3118 }
3119 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3120 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3121 }
3122 else if (r_type == R_390_TLS_LDCALL)
3123 {
3124 if (!bfd_link_pic (info))
3125 {
3126 unsigned int insn0, insn1;
3127
3128 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3129 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3130 if ((insn0 & 0xffff0000) != 0xc0e50000)
3131 {
3132 invalid_tls_insn (input_bfd, input_section, rel);
3133 return FALSE;
3134 }
3135 /* LD->LE transition.
3136 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3137 insn0 = 0xc0040000;
3138 insn1 = 0x0000;
3139 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3140 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3141 }
3142 }
3143 continue;
3144
3145 default:
3146 break;
3147 }
3148
3149 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3150 because such sections are not SEC_ALLOC and thus ld.so will
3151 not process them. */
3152 if (unresolved_reloc
3153 && !((input_section->flags & SEC_DEBUGGING) != 0
3154 && h->def_dynamic)
3155 && _bfd_elf_section_offset (output_bfd, info, input_section,
3156 rel->r_offset) != (bfd_vma) -1)
3157 _bfd_error_handler
3158 /* xgettext:c-format */
3159 (_("%pB(%pA+%#" PRIx64 "): "
3160 "unresolvable %s relocation against symbol `%s'"),
3161 input_bfd,
3162 input_section,
3163 (uint64_t) rel->r_offset,
3164 howto->name,
3165 h->root.root.string);
3166
3167 do_relocation:
3168
3169 /* When applying a 24 bit reloc we need to start one byte
3170 earlier. Otherwise the 32 bit get/put bfd operations might
3171 access a byte after the actual section. */
3172 if (r_type == R_390_PC24DBL
3173 || r_type == R_390_PLT24DBL)
3174 rel->r_offset--;
3175
3176 if (r_type == R_390_20
3177 || r_type == R_390_GOT20
3178 || r_type == R_390_GOTPLT20
3179 || r_type == R_390_TLS_GOTIE20)
3180 {
3181 relocation += rel->r_addend;
3182 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3183 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3184 contents, rel->r_offset,
3185 relocation, 0);
3186 }
3187 else
3188 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3189 contents, rel->r_offset,
3190 relocation, rel->r_addend);
3191
3192 if (r != bfd_reloc_ok)
3193 {
3194 const char *name;
3195
3196 if (h != NULL)
3197 name = h->root.root.string;
3198 else
3199 {
3200 name = bfd_elf_string_from_elf_section (input_bfd,
3201 symtab_hdr->sh_link,
3202 sym->st_name);
3203 if (name == NULL)
3204 return FALSE;
3205 if (*name == '\0')
3206 name = bfd_section_name (sec);
3207 }
3208
3209 if (r == bfd_reloc_overflow)
3210 (*info->callbacks->reloc_overflow)
3211 (info, (h ? &h->root : NULL), name, howto->name,
3212 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3213 else
3214 {
3215 _bfd_error_handler
3216 /* xgettext:c-format */
3217 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3218 input_bfd, input_section,
3219 (uint64_t) rel->r_offset, name, (int) r);
3220 return FALSE;
3221 }
3222 }
3223 }
3224
3225 return TRUE;
3226 }
3227
3228 /* Generate the PLT slots together with the dynamic relocations needed
3229 for IFUNC symbols. */
3230
3231 static void
3232 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3233 struct bfd_link_info *info,
3234 struct elf_link_hash_entry *h,
3235 struct elf_s390_link_hash_table *htab,
3236 bfd_vma plt_offset,
3237 bfd_vma resolver_address)
3238 {
3239 bfd_vma plt_index;
3240 bfd_vma got_offset;
3241 Elf_Internal_Rela rela;
3242 bfd_byte *loc;
3243 asection *plt, *gotplt, *relplt;
3244
3245 if (htab->elf.iplt == NULL
3246 || htab->elf.igotplt == NULL
3247 || htab->elf.irelplt == NULL)
3248 abort ();
3249
3250 /* Index of the PLT slot within iplt section. */
3251 plt_index = plt_offset / PLT_ENTRY_SIZE;
3252 plt = htab->elf.iplt;
3253 /* Offset into the igot.plt section. */
3254 got_offset = plt_index * GOT_ENTRY_SIZE;
3255 gotplt = htab->elf.igotplt;
3256 relplt = htab->elf.irelplt;
3257
3258 /* Fill in the blueprint of a PLT. */
3259 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3260 PLT_ENTRY_SIZE);
3261
3262 /* Fixup the relative address to the GOT entry */
3263 bfd_put_32 (output_bfd,
3264 (gotplt->output_section->vma +
3265 gotplt->output_offset + got_offset
3266 - (plt->output_section->vma +
3267 plt->output_offset +
3268 plt_offset))/2,
3269 plt->contents + plt_offset + 2);
3270 /* Fixup the relative branch to PLT 0 */
3271 bfd_put_32 (output_bfd, - (plt->output_offset +
3272 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3273 plt->contents + plt_offset + 24);
3274 /* Fixup offset into .rela.plt section. */
3275 bfd_put_32 (output_bfd, relplt->output_offset +
3276 plt_index * sizeof (Elf64_External_Rela),
3277 plt->contents + plt_offset + 28);
3278
3279 /* Fill in the entry in the global offset table.
3280 Points to instruction after GOT offset. */
3281 bfd_put_64 (output_bfd,
3282 (plt->output_section->vma
3283 + plt->output_offset
3284 + plt_offset
3285 + 14),
3286 gotplt->contents + got_offset);
3287
3288 /* Fill in the entry in the .rela.plt section. */
3289 rela.r_offset = (gotplt->output_section->vma
3290 + gotplt->output_offset
3291 + got_offset);
3292
3293 if (!h
3294 || h->dynindx == -1
3295 || ((bfd_link_executable (info)
3296 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3297 && h->def_regular))
3298 {
3299 /* The symbol can be locally resolved. */
3300 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3301 rela.r_addend = resolver_address;
3302 }
3303 else
3304 {
3305 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3306 rela.r_addend = 0;
3307 }
3308
3309 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3310 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3311 }
3312
3313
3314 /* Finish up dynamic symbol handling. We set the contents of various
3315 dynamic sections here. */
3316
3317 static bfd_boolean
3318 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3319 struct bfd_link_info *info,
3320 struct elf_link_hash_entry *h,
3321 Elf_Internal_Sym *sym)
3322 {
3323 struct elf_s390_link_hash_table *htab;
3324 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3325
3326 htab = elf_s390_hash_table (info);
3327 if (htab == NULL)
3328 return FALSE;
3329
3330 if (h->plt.offset != (bfd_vma) -1)
3331 {
3332 bfd_vma plt_index;
3333 bfd_vma gotplt_offset;
3334 Elf_Internal_Rela rela;
3335 bfd_byte *loc;
3336
3337 /* This symbol has an entry in the procedure linkage table. Set
3338 it up. */
3339 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3340 {
3341 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3342 htab, h->plt.offset,
3343 eh->ifunc_resolver_address +
3344 eh->ifunc_resolver_section->output_offset +
3345 eh->ifunc_resolver_section->output_section->vma);
3346
3347 /* Do not return yet. Handling of explicit GOT slots of
3348 IFUNC symbols is below. */
3349 }
3350 else
3351 {
3352 if (h->dynindx == -1
3353 || htab->elf.splt == NULL
3354 || htab->elf.sgotplt == NULL
3355 || htab->elf.srelplt == NULL)
3356 abort ();
3357
3358 /* Calc. index no.
3359 Current offset - size first entry / entry size. */
3360 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3361
3362 /* The slots in the .got.plt correspond to the PLT slots in
3363 the same order. */
3364 gotplt_offset = plt_index * GOT_ENTRY_SIZE;
3365
3366 /* If .got.plt comes first it needs to contain the 3 header
3367 entries. */
3368 if (!s390_gotplt_after_got_p (info))
3369 gotplt_offset += 3 * GOT_ENTRY_SIZE;
3370
3371 /* Fill in the blueprint of a PLT. */
3372 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3373 PLT_ENTRY_SIZE);
3374
3375 /* The first instruction in the PLT entry is a LARL loading
3376 the address of the GOT slot. We write the 4 byte
3377 immediate operand of the LARL instruction here. */
3378 bfd_put_32 (output_bfd,
3379 (htab->elf.sgotplt->output_section->vma +
3380 htab->elf.sgotplt->output_offset + gotplt_offset
3381 - (htab->elf.splt->output_section->vma +
3382 htab->elf.splt->output_offset +
3383 h->plt.offset))/2,
3384 htab->elf.splt->contents + h->plt.offset + 2);
3385 /* Fixup the relative branch to PLT 0 */
3386 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3387 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3388 htab->elf.splt->contents + h->plt.offset + 24);
3389 /* Fixup offset into .rela.plt section. */
3390 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3391 htab->elf.splt->contents + h->plt.offset + 28);
3392
3393 /* Fill in the entry in the global offset table.
3394 Points to instruction after GOT offset. */
3395 bfd_put_64 (output_bfd,
3396 (htab->elf.splt->output_section->vma
3397 + htab->elf.splt->output_offset
3398 + h->plt.offset
3399 + 14),
3400 htab->elf.sgotplt->contents + gotplt_offset);
3401
3402 /* Fill in the entry in the .rela.plt section. */
3403 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3404 + htab->elf.sgotplt->output_offset
3405 + gotplt_offset);
3406 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3407 rela.r_addend = 0;
3408 loc = htab->elf.srelplt->contents + plt_index *
3409 sizeof (Elf64_External_Rela);
3410 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3411
3412 if (!h->def_regular)
3413 {
3414 /* Mark the symbol as undefined, rather than as defined in
3415 the .plt section. Leave the value alone. This is a clue
3416 for the dynamic linker, to make function pointer
3417 comparisons work between an application and shared
3418 library. */
3419 sym->st_shndx = SHN_UNDEF;
3420 }
3421 }
3422 }
3423
3424 if (h->got.offset != (bfd_vma) -1
3425 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3426 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3427 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3428 {
3429 Elf_Internal_Rela rela;
3430 bfd_byte *loc;
3431
3432 /* This symbol has an entry in the global offset table. Set it
3433 up. */
3434 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3435 abort ();
3436
3437 rela.r_offset = (htab->elf.sgot->output_section->vma
3438 + htab->elf.sgot->output_offset
3439 + (h->got.offset &~ (bfd_vma) 1));
3440
3441 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3442 {
3443 if (bfd_link_pic (info))
3444 {
3445 /* An explicit GOT slot usage needs GLOB_DAT. If the
3446 symbol references local the implicit got.iplt slot
3447 will be used and the IRELATIVE reloc has been created
3448 above. */
3449 goto do_glob_dat;
3450 }
3451 else
3452 {
3453 /* For non-shared objects explicit GOT slots must be
3454 filled with the PLT slot address for pointer
3455 equality reasons. */
3456 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3457 + htab->elf.iplt->output_offset
3458 + h->plt.offset),
3459 htab->elf.sgot->contents + h->got.offset);
3460 return TRUE;
3461 }
3462 }
3463 else if (bfd_link_pic (info)
3464 && SYMBOL_REFERENCES_LOCAL (info, h))
3465 {
3466 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3467 return TRUE;
3468
3469 /* If this is a static link, or it is a -Bsymbolic link and
3470 the symbol is defined locally or was forced to be local
3471 because of a version file, we just want to emit a
3472 RELATIVE reloc. The entry in the global offset table
3473 will already have been initialized in the
3474 relocate_section function. */
3475 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3476 return FALSE;
3477 BFD_ASSERT((h->got.offset & 1) != 0);
3478 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3479 rela.r_addend = (h->root.u.def.value
3480 + h->root.u.def.section->output_section->vma
3481 + h->root.u.def.section->output_offset);
3482 }
3483 else
3484 {
3485 BFD_ASSERT((h->got.offset & 1) == 0);
3486 do_glob_dat:
3487 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3488 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3489 rela.r_addend = 0;
3490 }
3491
3492 loc = htab->elf.srelgot->contents;
3493 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3494 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3495 }
3496
3497 if (h->needs_copy)
3498 {
3499 Elf_Internal_Rela rela;
3500 asection *s;
3501 bfd_byte *loc;
3502
3503 /* This symbols needs a copy reloc. Set it up. */
3504
3505 if (h->dynindx == -1
3506 || (h->root.type != bfd_link_hash_defined
3507 && h->root.type != bfd_link_hash_defweak)
3508 || htab->elf.srelbss == NULL)
3509 abort ();
3510
3511 rela.r_offset = (h->root.u.def.value
3512 + h->root.u.def.section->output_section->vma
3513 + h->root.u.def.section->output_offset);
3514 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3515 rela.r_addend = 0;
3516 if (h->root.u.def.section == htab->elf.sdynrelro)
3517 s = htab->elf.sreldynrelro;
3518 else
3519 s = htab->elf.srelbss;
3520 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3521 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3522 }
3523
3524 /* Mark some specially defined symbols as absolute. */
3525 if (h == htab->elf.hdynamic
3526 || h == htab->elf.hgot
3527 || h == htab->elf.hplt)
3528 sym->st_shndx = SHN_ABS;
3529
3530 return TRUE;
3531 }
3532
3533 /* Used to decide how to sort relocs in an optimal manner for the
3534 dynamic linker, before writing them out. */
3535
3536 static enum elf_reloc_type_class
3537 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3538 const asection *rel_sec ATTRIBUTE_UNUSED,
3539 const Elf_Internal_Rela *rela)
3540 {
3541 bfd *abfd = info->output_bfd;
3542 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3543 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3544 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3545 Elf_Internal_Sym sym;
3546
3547 if (htab->elf.dynsym == NULL
3548 || !bed->s->swap_symbol_in (abfd,
3549 (htab->elf.dynsym->contents
3550 + r_symndx * bed->s->sizeof_sym),
3551 0, &sym))
3552 abort ();
3553
3554 /* Check relocation against STT_GNU_IFUNC symbol. */
3555 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3556 return reloc_class_ifunc;
3557
3558 switch ((int) ELF64_R_TYPE (rela->r_info))
3559 {
3560 case R_390_RELATIVE:
3561 return reloc_class_relative;
3562 case R_390_JMP_SLOT:
3563 return reloc_class_plt;
3564 case R_390_COPY:
3565 return reloc_class_copy;
3566 default:
3567 return reloc_class_normal;
3568 }
3569 }
3570
3571 /* Finish up the dynamic sections. */
3572
3573 static bfd_boolean
3574 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3575 struct bfd_link_info *info)
3576 {
3577 struct elf_s390_link_hash_table *htab;
3578 bfd *dynobj;
3579 asection *sdyn;
3580 bfd *ibfd;
3581 unsigned int i;
3582
3583 htab = elf_s390_hash_table (info);
3584 if (htab == NULL)
3585 return FALSE;
3586
3587 dynobj = htab->elf.dynobj;
3588 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3589
3590 if (htab->elf.dynamic_sections_created)
3591 {
3592 Elf64_External_Dyn *dyncon, *dynconend;
3593
3594 if (sdyn == NULL || htab->elf.sgot == NULL)
3595 abort ();
3596
3597 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3598 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3599 for (; dyncon < dynconend; dyncon++)
3600 {
3601 Elf_Internal_Dyn dyn;
3602 asection *s;
3603
3604 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3605
3606 switch (dyn.d_tag)
3607 {
3608 default:
3609 continue;
3610
3611 case DT_PLTGOT:
3612 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3613 dyn.d_un.d_ptr = s390_got_pointer (info);
3614 break;
3615
3616 case DT_JMPREL:
3617 s = htab->elf.srelplt;
3618 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3619 break;
3620
3621 case DT_PLTRELSZ:
3622 dyn.d_un.d_val = htab->elf.srelplt->size;
3623 if (htab->elf.irelplt)
3624 dyn.d_un.d_val += htab->elf.irelplt->size;
3625 break;
3626
3627 case DT_RELASZ:
3628 /* The procedure linkage table relocs (DT_JMPREL) should
3629 not be included in the overall relocs (DT_RELA).
3630 Therefore, we override the DT_RELASZ entry here to
3631 make it not include the JMPREL relocs. Since the
3632 linker script arranges for .rela.plt to follow all
3633 other relocation sections, we don't have to worry
3634 about changing the DT_RELA entry. */
3635 dyn.d_un.d_val -= htab->elf.srelplt->size;
3636 if (htab->elf.irelplt)
3637 dyn.d_un.d_val -= htab->elf.irelplt->size;
3638 break;
3639 }
3640
3641 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3642 }
3643
3644 /* Fill in the special first entry in the procedure linkage table. */
3645 if (htab->elf.splt && htab->elf.splt->size > 0)
3646 {
3647 /* fill in blueprint for plt 0 entry */
3648 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3649 PLT_FIRST_ENTRY_SIZE);
3650 /* The second instruction in the first PLT entry is a LARL
3651 loading the GOT pointer. Fill in the LARL immediate
3652 address. */
3653 bfd_put_32 (output_bfd,
3654 (s390_got_pointer (info)
3655 - htab->elf.splt->output_section->vma
3656 - htab->elf.splt->output_offset - 6)/2,
3657 htab->elf.splt->contents + 8);
3658 }
3659 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3660 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3661 = PLT_ENTRY_SIZE;
3662 }
3663
3664 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
3665 {
3666 /* Fill in the first three entries in the global offset table. */
3667 if (htab->elf.hgot->root.u.def.section->size > 0)
3668 {
3669 bfd_put_64 (output_bfd,
3670 (sdyn == NULL ? (bfd_vma) 0
3671 : sdyn->output_section->vma + sdyn->output_offset),
3672 htab->elf.hgot->root.u.def.section->contents);
3673 /* One entry for shared object struct ptr. */
3674 bfd_put_64 (output_bfd, (bfd_vma) 0,
3675 htab->elf.hgot->root.u.def.section->contents + 8);
3676 /* One entry for _dl_runtime_resolve. */
3677 bfd_put_64 (output_bfd, (bfd_vma) 0,
3678 htab->elf.hgot->root.u.def.section->contents + 16);
3679 }
3680 elf_section_data (htab->elf.sgot->output_section)
3681 ->this_hdr.sh_entsize = 8;
3682 }
3683
3684 /* Finish dynamic symbol for local IFUNC symbols. */
3685 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3686 {
3687 struct plt_entry *local_plt;
3688 Elf_Internal_Sym *isym;
3689 Elf_Internal_Shdr *symtab_hdr;
3690
3691 symtab_hdr = &elf_symtab_hdr (ibfd);
3692
3693 if (!is_s390_elf (ibfd))
3694 continue;
3695
3696 local_plt = elf_s390_local_plt (ibfd);
3697 if (local_plt != NULL)
3698 for (i = 0; i < symtab_hdr->sh_info; i++)
3699 {
3700 if (local_plt[i].plt.offset != (bfd_vma) -1)
3701 {
3702 asection *sec = local_plt[i].sec;
3703 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3704 if (isym == NULL)
3705 return FALSE;
3706
3707 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3708 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3709 local_plt[i].plt.offset,
3710 isym->st_value
3711 + sec->output_section->vma
3712 + sec->output_offset);
3713
3714 }
3715 }
3716 }
3717
3718 return TRUE;
3719 }
3720 \f
3721 /* Support for core dump NOTE sections. */
3722
3723 static bfd_boolean
3724 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3725 {
3726 int offset;
3727 size_t size;
3728
3729 switch (note->descsz)
3730 {
3731 default:
3732 return FALSE;
3733
3734 case 336: /* sizeof(struct elf_prstatus) on s390x */
3735 /* pr_cursig */
3736 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3737
3738 /* pr_pid */
3739 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3740
3741 /* pr_reg */
3742 offset = 112;
3743 size = 216;
3744 break;
3745 }
3746
3747 /* Make a ".reg/999" section. */
3748 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3749 size, note->descpos + offset);
3750 }
3751
3752 static bfd_boolean
3753 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3754 {
3755 switch (note->descsz)
3756 {
3757 default:
3758 return FALSE;
3759
3760 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3761 elf_tdata (abfd)->core->pid
3762 = bfd_get_32 (abfd, note->descdata + 24);
3763 elf_tdata (abfd)->core->program
3764 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3765 elf_tdata (abfd)->core->command
3766 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3767 }
3768
3769 /* Note that for some reason, a spurious space is tacked
3770 onto the end of the args in some (at least one anyway)
3771 implementations, so strip it off if it exists. */
3772
3773 {
3774 char *command = elf_tdata (abfd)->core->command;
3775 int n = strlen (command);
3776
3777 if (0 < n && command[n - 1] == ' ')
3778 command[n - 1] = '\0';
3779 }
3780
3781 return TRUE;
3782 }
3783
3784 static char *
3785 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3786 int note_type, ...)
3787 {
3788 va_list ap;
3789
3790 switch (note_type)
3791 {
3792 default:
3793 return NULL;
3794
3795 case NT_PRPSINFO:
3796 {
3797 char data[136] ATTRIBUTE_NONSTRING = { 0 };
3798 const char *fname, *psargs;
3799
3800 va_start (ap, note_type);
3801 fname = va_arg (ap, const char *);
3802 psargs = va_arg (ap, const char *);
3803 va_end (ap);
3804
3805 strncpy (data + 40, fname, 16);
3806 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3807 DIAGNOSTIC_PUSH;
3808 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3809 -Wstringop-truncation:
3810 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3811 */
3812 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3813 #endif
3814 strncpy (data + 56, psargs, 80);
3815 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3816 DIAGNOSTIC_POP;
3817 #endif
3818 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3819 &data, sizeof (data));
3820 }
3821
3822 case NT_PRSTATUS:
3823 {
3824 char data[336] = { 0 };
3825 long pid;
3826 int cursig;
3827 const void *gregs;
3828
3829 va_start (ap, note_type);
3830 pid = va_arg (ap, long);
3831 cursig = va_arg (ap, int);
3832 gregs = va_arg (ap, const void *);
3833 va_end (ap);
3834
3835 bfd_put_16 (abfd, cursig, data + 12);
3836 bfd_put_32 (abfd, pid, data + 32);
3837 memcpy (data + 112, gregs, 216);
3838 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3839 &data, sizeof (data));
3840 }
3841 }
3842 /* NOTREACHED */
3843 }
3844 \f
3845 /* Return address for Ith PLT stub in section PLT, for relocation REL
3846 or (bfd_vma) -1 if it should not be included. */
3847
3848 static bfd_vma
3849 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3850 const arelent *rel ATTRIBUTE_UNUSED)
3851 {
3852 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3853 }
3854
3855 /* Merge backend specific data from an object file to the output
3856 object file when linking. */
3857
3858 static bfd_boolean
3859 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3860 {
3861 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3862 return TRUE;
3863
3864 return elf_s390_merge_obj_attributes (ibfd, info);
3865 }
3866
3867 /* We may add a PT_S390_PGSTE program header. */
3868
3869 static int
3870 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3871 struct bfd_link_info *info)
3872 {
3873 struct elf_s390_link_hash_table *htab;
3874
3875 if (info)
3876 {
3877 htab = elf_s390_hash_table (info);
3878 if (htab)
3879 return htab->params->pgste;
3880 }
3881 return 0;
3882 }
3883
3884
3885 /* Add the PT_S390_PGSTE program header. */
3886
3887 static bfd_boolean
3888 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3889 {
3890 struct elf_s390_link_hash_table *htab;
3891 struct elf_segment_map *m, *pm = NULL;
3892
3893 if (!abfd || !info)
3894 return TRUE;
3895
3896 htab = elf_s390_hash_table (info);
3897 if (!htab || !htab->params->pgste)
3898 return TRUE;
3899
3900 /* If there is already a PT_S390_PGSTE header, avoid adding
3901 another. */
3902 m = elf_seg_map (abfd);
3903 while (m && m->p_type != PT_S390_PGSTE)
3904 {
3905 pm = m;
3906 m = m->next;
3907 }
3908
3909 if (m)
3910 return TRUE;
3911
3912 m = (struct elf_segment_map *)
3913 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3914 if (m == NULL)
3915 return FALSE;
3916 m->p_type = PT_S390_PGSTE;
3917 m->count = 0;
3918 m->next = NULL;
3919 if (pm)
3920 pm->next = m;
3921
3922 return TRUE;
3923 }
3924
3925 bfd_boolean
3926 bfd_elf_s390_set_options (struct bfd_link_info *info,
3927 struct s390_elf_params *params)
3928 {
3929 struct elf_s390_link_hash_table *htab;
3930
3931 if (info)
3932 {
3933 htab = elf_s390_hash_table (info);
3934 if (htab)
3935 htab->params = params;
3936 }
3937
3938 return TRUE;
3939 }
3940
3941
3942 /* Why was the hash table entry size definition changed from
3943 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3944 this is the only reason for the s390_elf64_size_info structure. */
3945
3946 const struct elf_size_info s390_elf64_size_info =
3947 {
3948 sizeof (Elf64_External_Ehdr),
3949 sizeof (Elf64_External_Phdr),
3950 sizeof (Elf64_External_Shdr),
3951 sizeof (Elf64_External_Rel),
3952 sizeof (Elf64_External_Rela),
3953 sizeof (Elf64_External_Sym),
3954 sizeof (Elf64_External_Dyn),
3955 sizeof (Elf_External_Note),
3956 8, /* hash-table entry size. */
3957 1, /* internal relocations per external relocations. */
3958 64, /* arch_size. */
3959 3, /* log_file_align. */
3960 ELFCLASS64, EV_CURRENT,
3961 bfd_elf64_write_out_phdrs,
3962 bfd_elf64_write_shdrs_and_ehdr,
3963 bfd_elf64_checksum_contents,
3964 bfd_elf64_write_relocs,
3965 bfd_elf64_swap_symbol_in,
3966 bfd_elf64_swap_symbol_out,
3967 bfd_elf64_slurp_reloc_table,
3968 bfd_elf64_slurp_symbol_table,
3969 bfd_elf64_swap_dyn_in,
3970 bfd_elf64_swap_dyn_out,
3971 bfd_elf64_swap_reloc_in,
3972 bfd_elf64_swap_reloc_out,
3973 bfd_elf64_swap_reloca_in,
3974 bfd_elf64_swap_reloca_out
3975 };
3976
3977 #define TARGET_BIG_SYM s390_elf64_vec
3978 #define TARGET_BIG_NAME "elf64-s390"
3979 #define ELF_ARCH bfd_arch_s390
3980 #define ELF_TARGET_ID S390_ELF_DATA
3981 #define ELF_MACHINE_CODE EM_S390
3982 #define ELF_MACHINE_ALT1 EM_S390_OLD
3983 #define ELF_MAXPAGESIZE 0x1000
3984
3985 #define elf_backend_size_info s390_elf64_size_info
3986
3987 #define elf_backend_can_gc_sections 1
3988 #define elf_backend_can_refcount 1
3989 #define elf_backend_want_got_plt 1
3990 #define elf_backend_plt_readonly 1
3991 #define elf_backend_want_plt_sym 0
3992 #define elf_backend_got_header_size 24
3993 #define elf_backend_want_dynrelro 1
3994 #define elf_backend_rela_normal 1
3995
3996 #define elf_info_to_howto elf_s390_info_to_howto
3997
3998 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3999 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
4000 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4001 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4002 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
4003
4004 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4005 #define elf_backend_check_relocs elf_s390_check_relocs
4006 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4007 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4008 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4009 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4010 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4011 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4012 #define elf_backend_relocate_section elf_s390_relocate_section
4013 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4014 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4015 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4016 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4017 #define elf_backend_write_core_note elf_s390_write_core_note
4018 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4019 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4020 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
4021 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
4022
4023 #define bfd_elf64_mkobject elf_s390_mkobject
4024 #define elf_backend_object_p elf_s390_object_p
4025
4026 #include "elf64-target.h"
GDB Binutils - Deliverables
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