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[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2018 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include "elf-s390.h"
29 #include <stdarg.h>
30
31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33 #define MINUS_ONE (((bfd_vma)0) - 1)
34
35 static bfd_reloc_status_type
36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
37 asection *, bfd *, char **);
38 static bfd_reloc_status_type
39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
40 asection *, bfd *, char **);
41
42 /* The relocation "howto" table. */
43 static reloc_howto_type elf_howto_table[] =
44 {
45 HOWTO (R_390_NONE, /* type */
46 0, /* rightshift */
47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
48 0, /* bitsize */
49 FALSE, /* pc_relative */
50 0, /* bitpos */
51 complain_overflow_dont, /* complain_on_overflow */
52 bfd_elf_generic_reloc, /* special_function */
53 "R_390_NONE", /* name */
54 FALSE, /* partial_inplace */
55 0, /* src_mask */
56 0, /* dst_mask */
57 FALSE), /* pcrel_offset */
58
59 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
75 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
79 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
81 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
83 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
85 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
87 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
99 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
101 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
103 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
105 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
107 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
109 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
111 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
113 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
115 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
123 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
125 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
138 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
140 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
149 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
151 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
154 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
165 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
169 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
173 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
175 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
181 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
183 };
184
185 /* GNU extension to record C++ vtable hierarchy. */
186 static reloc_howto_type elf64_s390_vtinherit_howto =
187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
188 static reloc_howto_type elf64_s390_vtentry_howto =
189 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
190
191 static reloc_howto_type *
192 elf_s390_reloc_type_lookup (bfd *abfd,
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 bfd_size_type 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 bfd_size_type 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 BFD_ASSERT (h != NULL);
1305 if (h != NULL
1306 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1307 return FALSE;
1308 break;
1309
1310 default:
1311 break;
1312 }
1313 }
1314
1315 return TRUE;
1316 }
1317
1318 /* Return the section that should be marked against GC for a given
1319 relocation. */
1320
1321 static asection *
1322 elf_s390_gc_mark_hook (asection *sec,
1323 struct bfd_link_info *info,
1324 Elf_Internal_Rela *rel,
1325 struct elf_link_hash_entry *h,
1326 Elf_Internal_Sym *sym)
1327 {
1328 if (h != NULL)
1329 switch (ELF64_R_TYPE (rel->r_info))
1330 {
1331 case R_390_GNU_VTINHERIT:
1332 case R_390_GNU_VTENTRY:
1333 return NULL;
1334 }
1335
1336 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1337 }
1338
1339 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1340 entry but we found we will not create any. Called when we find we will
1341 not have any PLT for this symbol, by for example
1342 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1343 or elf_s390_size_dynamic_sections if no dynamic sections will be
1344 created (we're only linking static objects). */
1345
1346 static void
1347 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1348 {
1349 if (h->elf.root.type == bfd_link_hash_warning)
1350 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1351
1352 if (h->gotplt_refcount <= 0)
1353 return;
1354
1355 /* We simply add the number of gotplt references to the number
1356 * of got references for this symbol. */
1357 h->elf.got.refcount += h->gotplt_refcount;
1358 h->gotplt_refcount = -1;
1359 }
1360
1361 /* Find dynamic relocs for H that apply to read-only sections. */
1362
1363 static asection *
1364 readonly_dynrelocs (struct elf_link_hash_entry *h)
1365 {
1366 struct elf_dyn_relocs *p;
1367
1368 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1369 {
1370 asection *s = p->sec->output_section;
1371
1372 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1373 return p->sec;
1374 }
1375 return NULL;
1376 }
1377
1378 /* Adjust a symbol defined by a dynamic object and referenced by a
1379 regular object. The current definition is in some section of the
1380 dynamic object, but we're not including those sections. We have to
1381 change the definition to something the rest of the link can
1382 understand. */
1383
1384 static bfd_boolean
1385 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1386 struct elf_link_hash_entry *h)
1387 {
1388 struct elf_s390_link_hash_table *htab;
1389 asection *s, *srel;
1390
1391 /* STT_GNU_IFUNC symbol must go through PLT. */
1392 if (s390_is_ifunc_symbol_p (h))
1393 {
1394 /* All local STT_GNU_IFUNC references must be treated as local
1395 calls via local PLT. */
1396 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1397 {
1398 bfd_size_type pc_count = 0, count = 0;
1399 struct elf_dyn_relocs **pp;
1400 struct elf_s390_link_hash_entry *eh;
1401 struct elf_dyn_relocs *p;
1402
1403 eh = (struct elf_s390_link_hash_entry *) h;
1404 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1405 {
1406 pc_count += p->pc_count;
1407 p->count -= p->pc_count;
1408 p->pc_count = 0;
1409 count += p->count;
1410 if (p->count == 0)
1411 *pp = p->next;
1412 else
1413 pp = &p->next;
1414 }
1415
1416 if (pc_count || count)
1417 {
1418 h->needs_plt = 1;
1419 h->non_got_ref = 1;
1420 if (h->plt.refcount <= 0)
1421 h->plt.refcount = 1;
1422 else
1423 h->plt.refcount += 1;
1424 }
1425 }
1426
1427 if (h->plt.refcount <= 0)
1428 {
1429 h->plt.offset = (bfd_vma) -1;
1430 h->needs_plt = 0;
1431 }
1432 return TRUE;
1433 }
1434
1435 /* If this is a function, put it in the procedure linkage table. We
1436 will fill in the contents of the procedure linkage table later
1437 (although we could actually do it here). */
1438 if (h->type == STT_FUNC
1439 || h->needs_plt)
1440 {
1441 if (h->plt.refcount <= 0
1442 || SYMBOL_CALLS_LOCAL (info, h)
1443 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1444 {
1445 /* This case can occur if we saw a PLT32 reloc in an input
1446 file, but the symbol was never referred to by a dynamic
1447 object, or if all references were garbage collected. In
1448 such a case, we don't actually need to build a procedure
1449 linkage table, and we can just do a PC32 reloc instead. */
1450 h->plt.offset = (bfd_vma) -1;
1451 h->needs_plt = 0;
1452 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1453 }
1454
1455 return TRUE;
1456 }
1457 else
1458 /* It's possible that we incorrectly decided a .plt reloc was
1459 needed for an R_390_PC32 reloc to a non-function sym in
1460 check_relocs. We can't decide accurately between function and
1461 non-function syms in check-relocs; Objects loaded later in
1462 the link may change h->type. So fix it now. */
1463 h->plt.offset = (bfd_vma) -1;
1464
1465 /* If this is a weak symbol, and there is a real definition, the
1466 processor independent code will have arranged for us to see the
1467 real definition first, and we can just use the same value. */
1468 if (h->is_weakalias)
1469 {
1470 struct elf_link_hash_entry *def = weakdef (h);
1471 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1472 h->root.u.def.section = def->root.u.def.section;
1473 h->root.u.def.value = def->root.u.def.value;
1474 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1475 h->non_got_ref = def->non_got_ref;
1476 return TRUE;
1477 }
1478
1479 /* This is a reference to a symbol defined by a dynamic object which
1480 is not a function. */
1481
1482 /* If we are creating a shared library, we must presume that the
1483 only references to the symbol are via the global offset table.
1484 For such cases we need not do anything here; the relocations will
1485 be handled correctly by relocate_section. */
1486 if (bfd_link_pic (info))
1487 return TRUE;
1488
1489 /* If there are no references to this symbol that do not use the
1490 GOT, we don't need to generate a copy reloc. */
1491 if (!h->non_got_ref)
1492 return TRUE;
1493
1494 /* If -z nocopyreloc was given, we won't generate them either. */
1495 if (info->nocopyreloc)
1496 {
1497 h->non_got_ref = 0;
1498 return TRUE;
1499 }
1500
1501 /* If we don't find any dynamic relocs in read-only sections, then
1502 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1503 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1504 {
1505 h->non_got_ref = 0;
1506 return TRUE;
1507 }
1508
1509 /* We must allocate the symbol in our .dynbss section, which will
1510 become part of the .bss section of the executable. There will be
1511 an entry for this symbol in the .dynsym section. The dynamic
1512 object will contain position independent code, so all references
1513 from the dynamic object to this symbol will go through the global
1514 offset table. The dynamic linker will use the .dynsym entry to
1515 determine the address it must put in the global offset table, so
1516 both the dynamic object and the regular object will refer to the
1517 same memory location for the variable. */
1518
1519 htab = elf_s390_hash_table (info);
1520 if (htab == NULL)
1521 return FALSE;
1522
1523 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1524 copy the initial value out of the dynamic object and into the
1525 runtime process image. */
1526 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1527 {
1528 s = htab->elf.sdynrelro;
1529 srel = htab->elf.sreldynrelro;
1530 }
1531 else
1532 {
1533 s = htab->elf.sdynbss;
1534 srel = htab->elf.srelbss;
1535 }
1536 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1537 {
1538 srel->size += sizeof (Elf64_External_Rela);
1539 h->needs_copy = 1;
1540 }
1541
1542 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1543 }
1544
1545 /* Allocate space in .plt, .got and associated reloc sections for
1546 dynamic relocs. */
1547
1548 static bfd_boolean
1549 allocate_dynrelocs (struct elf_link_hash_entry *h,
1550 void * inf)
1551 {
1552 struct bfd_link_info *info;
1553 struct elf_s390_link_hash_table *htab;
1554 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1555 struct elf_dyn_relocs *p;
1556
1557 if (h->root.type == bfd_link_hash_indirect)
1558 return TRUE;
1559
1560 info = (struct bfd_link_info *) inf;
1561 htab = elf_s390_hash_table (info);
1562 if (htab == NULL)
1563 return FALSE;
1564
1565 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1566 here if it is defined and referenced in a non-shared object. */
1567 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1568 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1569 else if (htab->elf.dynamic_sections_created
1570 && h->plt.refcount > 0)
1571 {
1572 /* Make sure this symbol is output as a dynamic symbol.
1573 Undefined weak syms won't yet be marked as dynamic. */
1574 if (h->dynindx == -1
1575 && !h->forced_local)
1576 {
1577 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1578 return FALSE;
1579 }
1580
1581 if (bfd_link_pic (info)
1582 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1583 {
1584 asection *s = htab->elf.splt;
1585
1586 /* If this is the first .plt entry, make room for the special
1587 first entry. */
1588 if (s->size == 0)
1589 s->size += PLT_FIRST_ENTRY_SIZE;
1590
1591 h->plt.offset = s->size;
1592
1593 /* If this symbol is not defined in a regular file, and we are
1594 not generating a shared library, then set the symbol to this
1595 location in the .plt. This is required to make function
1596 pointers compare as equal between the normal executable and
1597 the shared library. */
1598 if (! bfd_link_pic (info)
1599 && !h->def_regular)
1600 {
1601 h->root.u.def.section = s;
1602 h->root.u.def.value = h->plt.offset;
1603 }
1604
1605 /* Make room for this entry. */
1606 s->size += PLT_ENTRY_SIZE;
1607
1608 /* We also need to make an entry in the .got.plt section. */
1609 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1610
1611 /* We also need to make an entry in the .rela.plt section. */
1612 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1613 }
1614 else
1615 {
1616 h->plt.offset = (bfd_vma) -1;
1617 h->needs_plt = 0;
1618 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1619 }
1620 }
1621 else
1622 {
1623 h->plt.offset = (bfd_vma) -1;
1624 h->needs_plt = 0;
1625 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1626 }
1627
1628 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1629 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1630 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1631 we can save the dynamic TLS relocation. */
1632 if (h->got.refcount > 0
1633 && !bfd_link_pic (info)
1634 && h->dynindx == -1
1635 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1636 {
1637 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1638 /* For the GOTIE access without a literal pool entry the offset has
1639 to be stored somewhere. The immediate value in the instruction
1640 is not bit enough so the value is stored in the got. */
1641 {
1642 h->got.offset = htab->elf.sgot->size;
1643 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1644 }
1645 else
1646 h->got.offset = (bfd_vma) -1;
1647 }
1648 else if (h->got.refcount > 0)
1649 {
1650 asection *s;
1651 bfd_boolean dyn;
1652 int tls_type = elf_s390_hash_entry(h)->tls_type;
1653
1654 /* Make sure this symbol is output as a dynamic symbol.
1655 Undefined weak syms won't yet be marked as dynamic. */
1656 if (h->dynindx == -1
1657 && !h->forced_local)
1658 {
1659 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1660 return FALSE;
1661 }
1662
1663 s = htab->elf.sgot;
1664 h->got.offset = s->size;
1665 s->size += GOT_ENTRY_SIZE;
1666 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1667 if (tls_type == GOT_TLS_GD)
1668 s->size += GOT_ENTRY_SIZE;
1669 dyn = htab->elf.dynamic_sections_created;
1670 /* R_390_TLS_IE64 needs one dynamic relocation,
1671 R_390_TLS_GD64 needs one if local symbol and two if global. */
1672 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1673 || tls_type >= GOT_TLS_IE)
1674 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1675 else if (tls_type == GOT_TLS_GD)
1676 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1677 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1678 && (bfd_link_pic (info)
1679 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1680 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1681 }
1682 else
1683 h->got.offset = (bfd_vma) -1;
1684
1685 if (eh->dyn_relocs == NULL)
1686 return TRUE;
1687
1688 /* In the shared -Bsymbolic case, discard space allocated for
1689 dynamic pc-relative relocs against symbols which turn out to be
1690 defined in regular objects. For the normal shared case, discard
1691 space for pc-relative relocs that have become local due to symbol
1692 visibility changes. */
1693
1694 if (bfd_link_pic (info))
1695 {
1696 if (SYMBOL_CALLS_LOCAL (info, h))
1697 {
1698 struct elf_dyn_relocs **pp;
1699
1700 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1701 {
1702 p->count -= p->pc_count;
1703 p->pc_count = 0;
1704 if (p->count == 0)
1705 *pp = p->next;
1706 else
1707 pp = &p->next;
1708 }
1709 }
1710
1711 /* Also discard relocs on undefined weak syms with non-default
1712 visibility. */
1713 if (eh->dyn_relocs != NULL
1714 && h->root.type == bfd_link_hash_undefweak)
1715 {
1716 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1717 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1718 eh->dyn_relocs = NULL;
1719
1720 /* Make sure undefined weak symbols are output as a dynamic
1721 symbol in PIEs. */
1722 else if (h->dynindx == -1
1723 && !h->forced_local)
1724 {
1725 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1726 return FALSE;
1727 }
1728 }
1729 }
1730 else if (ELIMINATE_COPY_RELOCS)
1731 {
1732 /* For the non-shared case, discard space for relocs against
1733 symbols which turn out to need copy relocs or are not
1734 dynamic. */
1735
1736 if (!h->non_got_ref
1737 && ((h->def_dynamic
1738 && !h->def_regular)
1739 || (htab->elf.dynamic_sections_created
1740 && (h->root.type == bfd_link_hash_undefweak
1741 || h->root.type == bfd_link_hash_undefined))))
1742 {
1743 /* Make sure this symbol is output as a dynamic symbol.
1744 Undefined weak syms won't yet be marked as dynamic. */
1745 if (h->dynindx == -1
1746 && !h->forced_local)
1747 {
1748 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1749 return FALSE;
1750 }
1751
1752 /* If that succeeded, we know we'll be keeping all the
1753 relocs. */
1754 if (h->dynindx != -1)
1755 goto keep;
1756 }
1757
1758 eh->dyn_relocs = NULL;
1759
1760 keep: ;
1761 }
1762
1763 /* Finally, allocate space. */
1764 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1765 {
1766 asection *sreloc = elf_section_data (p->sec)->sreloc;
1767 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1768 }
1769
1770 return TRUE;
1771 }
1772
1773 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1774 read-only sections. */
1775
1776 static bfd_boolean
1777 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1778 {
1779 asection *sec;
1780
1781 if (h->root.type == bfd_link_hash_indirect)
1782 return TRUE;
1783
1784 sec = readonly_dynrelocs (h);
1785 if (sec != NULL)
1786 {
1787 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1788
1789 info->flags |= DF_TEXTREL;
1790 info->callbacks->minfo
1791 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1792 sec->owner, h->root.root.string, sec);
1793
1794 /* Not an error, just cut short the traversal. */
1795 return FALSE;
1796 }
1797 return TRUE;
1798 }
1799
1800 /* Set the sizes of the dynamic sections. */
1801
1802 static bfd_boolean
1803 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1804 struct bfd_link_info *info)
1805 {
1806 struct elf_s390_link_hash_table *htab;
1807 bfd *dynobj;
1808 asection *s;
1809 bfd_boolean relocs;
1810 bfd *ibfd;
1811
1812 htab = elf_s390_hash_table (info);
1813 if (htab == NULL)
1814 return FALSE;
1815
1816 dynobj = htab->elf.dynobj;
1817 if (dynobj == NULL)
1818 abort ();
1819
1820 if (htab->elf.dynamic_sections_created)
1821 {
1822 /* Set the contents of the .interp section to the interpreter. */
1823 if (bfd_link_executable (info) && !info->nointerp)
1824 {
1825 s = bfd_get_linker_section (dynobj, ".interp");
1826 if (s == NULL)
1827 abort ();
1828 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1829 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1830 }
1831 }
1832
1833 if (htab->elf.sgot && s390_gotplt_after_got_p (info))
1834 {
1835 /* _bfd_elf_create_got_section adds the got header size always
1836 to .got.plt but we need it in .got if this section comes
1837 first. */
1838 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
1839 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
1840
1841 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1842 instead of .got.plt. */
1843 htab->elf.hgot->root.u.def.section = htab->elf.sgot;
1844 htab->elf.hgot->root.u.def.value = 0;
1845 }
1846
1847 /* Set up .got offsets for local syms, and space for local dynamic
1848 relocs. */
1849 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1850 {
1851 bfd_signed_vma *local_got;
1852 bfd_signed_vma *end_local_got;
1853 char *local_tls_type;
1854 bfd_size_type locsymcount;
1855 Elf_Internal_Shdr *symtab_hdr;
1856 asection *srela;
1857 struct plt_entry *local_plt;
1858 unsigned int i;
1859
1860 if (! is_s390_elf (ibfd))
1861 continue;
1862
1863 for (s = ibfd->sections; s != NULL; s = s->next)
1864 {
1865 struct elf_dyn_relocs *p;
1866
1867 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1868 {
1869 if (!bfd_is_abs_section (p->sec)
1870 && bfd_is_abs_section (p->sec->output_section))
1871 {
1872 /* Input section has been discarded, either because
1873 it is a copy of a linkonce section or due to
1874 linker script /DISCARD/, so we'll be discarding
1875 the relocs too. */
1876 }
1877 else if (p->count != 0)
1878 {
1879 srela = elf_section_data (p->sec)->sreloc;
1880 srela->size += p->count * sizeof (Elf64_External_Rela);
1881 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1882 info->flags |= DF_TEXTREL;
1883 }
1884 }
1885 }
1886
1887 local_got = elf_local_got_refcounts (ibfd);
1888 if (!local_got)
1889 continue;
1890
1891 symtab_hdr = &elf_symtab_hdr (ibfd);
1892 locsymcount = symtab_hdr->sh_info;
1893 end_local_got = local_got + locsymcount;
1894 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1895 s = htab->elf.sgot;
1896 srela = htab->elf.srelgot;
1897 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1898 {
1899 if (*local_got > 0)
1900 {
1901 *local_got = s->size;
1902 s->size += GOT_ENTRY_SIZE;
1903 if (*local_tls_type == GOT_TLS_GD)
1904 s->size += GOT_ENTRY_SIZE;
1905 if (bfd_link_pic (info))
1906 srela->size += sizeof (Elf64_External_Rela);
1907 }
1908 else
1909 *local_got = (bfd_vma) -1;
1910 }
1911
1912 local_plt = elf_s390_local_plt (ibfd);
1913 for (i = 0; i < symtab_hdr->sh_info; i++)
1914 {
1915 if (local_plt[i].plt.refcount > 0)
1916 {
1917 local_plt[i].plt.offset = htab->elf.iplt->size;
1918 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1919 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1920 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1921 }
1922 else
1923 local_plt[i].plt.offset = (bfd_vma) -1;
1924 }
1925 }
1926
1927 if (htab->tls_ldm_got.refcount > 0)
1928 {
1929 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1930 relocs. */
1931 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1932 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1933 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1934 }
1935 else
1936 htab->tls_ldm_got.offset = -1;
1937
1938 /* Allocate global sym .plt and .got entries, and space for global
1939 sym dynamic relocs. */
1940 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1941
1942 /* We now have determined the sizes of the various dynamic sections.
1943 Allocate memory for them. */
1944 relocs = FALSE;
1945 for (s = dynobj->sections; s != NULL; s = s->next)
1946 {
1947 if ((s->flags & SEC_LINKER_CREATED) == 0)
1948 continue;
1949
1950 if (s == htab->elf.splt
1951 || s == htab->elf.sgot
1952 || s == htab->elf.sgotplt
1953 || s == htab->elf.sdynbss
1954 || s == htab->elf.sdynrelro
1955 || s == htab->elf.iplt
1956 || s == htab->elf.igotplt
1957 || s == htab->irelifunc)
1958 {
1959 /* Strip this section if we don't need it; see the
1960 comment below. */
1961 }
1962 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
1963 {
1964 if (s->size != 0 && s != htab->elf.srelplt)
1965 relocs = TRUE;
1966
1967 /* We use the reloc_count field as a counter if we need
1968 to copy relocs into the output file. */
1969 s->reloc_count = 0;
1970 }
1971 else
1972 {
1973 /* It's not one of our sections, so don't allocate space. */
1974 continue;
1975 }
1976
1977 if (s->size == 0)
1978 {
1979 /* If we don't need this section, strip it from the
1980 output file. This is to handle .rela.bss and
1981 .rela.plt. We must create it in
1982 create_dynamic_sections, because it must be created
1983 before the linker maps input sections to output
1984 sections. The linker does that before
1985 adjust_dynamic_symbol is called, and it is that
1986 function which decides whether anything needs to go
1987 into these sections. */
1988
1989 s->flags |= SEC_EXCLUDE;
1990 continue;
1991 }
1992
1993 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1994 continue;
1995
1996 /* Allocate memory for the section contents. We use bfd_zalloc
1997 here in case unused entries are not reclaimed before the
1998 section's contents are written out. This should not happen,
1999 but this way if it does, we get a R_390_NONE reloc instead
2000 of garbage. */
2001 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2002 if (s->contents == NULL)
2003 return FALSE;
2004 }
2005
2006 if (htab->elf.dynamic_sections_created)
2007 {
2008 /* Add some entries to the .dynamic section. We fill in the
2009 values later, in elf_s390_finish_dynamic_sections, but we
2010 must add the entries now so that we get the correct size for
2011 the .dynamic section. The DT_DEBUG entry is filled in by the
2012 dynamic linker and used by the debugger. */
2013 #define add_dynamic_entry(TAG, VAL) \
2014 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2015
2016 if (bfd_link_executable (info))
2017 {
2018 if (!add_dynamic_entry (DT_DEBUG, 0))
2019 return FALSE;
2020 }
2021
2022 if (htab->elf.splt->size != 0)
2023 {
2024 if (!add_dynamic_entry (DT_PLTGOT, 0)
2025 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2026 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2027 || !add_dynamic_entry (DT_JMPREL, 0))
2028 return FALSE;
2029 }
2030
2031 if (relocs)
2032 {
2033 if (!add_dynamic_entry (DT_RELA, 0)
2034 || !add_dynamic_entry (DT_RELASZ, 0)
2035 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2036 return FALSE;
2037
2038 /* If any dynamic relocs apply to a read-only section,
2039 then we need a DT_TEXTREL entry. */
2040 if ((info->flags & DF_TEXTREL) == 0)
2041 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2042
2043 if ((info->flags & DF_TEXTREL) != 0)
2044 {
2045 if (!add_dynamic_entry (DT_TEXTREL, 0))
2046 return FALSE;
2047 }
2048 }
2049 }
2050 #undef add_dynamic_entry
2051
2052 return TRUE;
2053 }
2054
2055 /* Return the base VMA address which should be subtracted from real addresses
2056 when resolving @dtpoff relocation.
2057 This is PT_TLS segment p_vaddr. */
2058
2059 static bfd_vma
2060 dtpoff_base (struct bfd_link_info *info)
2061 {
2062 /* If tls_sec is NULL, we should have signalled an error already. */
2063 if (elf_hash_table (info)->tls_sec == NULL)
2064 return 0;
2065 return elf_hash_table (info)->tls_sec->vma;
2066 }
2067
2068 /* Return the relocation value for @tpoff relocation
2069 if STT_TLS virtual address is ADDRESS. */
2070
2071 static bfd_vma
2072 tpoff (struct bfd_link_info *info, bfd_vma address)
2073 {
2074 struct elf_link_hash_table *htab = elf_hash_table (info);
2075
2076 /* If tls_sec is NULL, we should have signalled an error already. */
2077 if (htab->tls_sec == NULL)
2078 return 0;
2079 return htab->tls_size + htab->tls_sec->vma - address;
2080 }
2081
2082 /* Complain if TLS instruction relocation is against an invalid
2083 instruction. */
2084
2085 static void
2086 invalid_tls_insn (bfd *input_bfd,
2087 asection *input_section,
2088 Elf_Internal_Rela *rel)
2089 {
2090 reloc_howto_type *howto;
2091
2092 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2093 _bfd_error_handler
2094 /* xgettext:c-format */
2095 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2096 input_bfd,
2097 input_section,
2098 (uint64_t) rel->r_offset,
2099 howto->name);
2100 bfd_set_error (bfd_error_bad_value);
2101 }
2102
2103 /* Relocate a 390 ELF section. */
2104
2105 static bfd_boolean
2106 elf_s390_relocate_section (bfd *output_bfd,
2107 struct bfd_link_info *info,
2108 bfd *input_bfd,
2109 asection *input_section,
2110 bfd_byte *contents,
2111 Elf_Internal_Rela *relocs,
2112 Elf_Internal_Sym *local_syms,
2113 asection **local_sections)
2114 {
2115 struct elf_s390_link_hash_table *htab;
2116 Elf_Internal_Shdr *symtab_hdr;
2117 struct elf_link_hash_entry **sym_hashes;
2118 bfd_vma *local_got_offsets;
2119 Elf_Internal_Rela *rel;
2120 Elf_Internal_Rela *relend;
2121
2122 BFD_ASSERT (is_s390_elf (input_bfd));
2123
2124 htab = elf_s390_hash_table (info);
2125 if (htab == NULL)
2126 return FALSE;
2127
2128 symtab_hdr = &elf_symtab_hdr (input_bfd);
2129 sym_hashes = elf_sym_hashes (input_bfd);
2130 local_got_offsets = elf_local_got_offsets (input_bfd);
2131
2132 rel = relocs;
2133 relend = relocs + input_section->reloc_count;
2134 for (; rel < relend; rel++)
2135 {
2136 unsigned int r_type;
2137 reloc_howto_type *howto;
2138 unsigned long r_symndx;
2139 struct elf_link_hash_entry *h;
2140 Elf_Internal_Sym *sym;
2141 asection *sec;
2142 bfd_vma off;
2143 bfd_vma relocation;
2144 bfd_boolean unresolved_reloc;
2145 bfd_reloc_status_type r;
2146 int tls_type;
2147 bfd_boolean resolved_to_zero;
2148
2149 r_type = ELF64_R_TYPE (rel->r_info);
2150 if (r_type == (int) R_390_GNU_VTINHERIT
2151 || r_type == (int) R_390_GNU_VTENTRY)
2152 continue;
2153 if (r_type >= (int) R_390_max)
2154 {
2155 bfd_set_error (bfd_error_bad_value);
2156 return FALSE;
2157 }
2158
2159 howto = elf_howto_table + r_type;
2160 r_symndx = ELF64_R_SYM (rel->r_info);
2161
2162 h = NULL;
2163 sym = NULL;
2164 sec = NULL;
2165 unresolved_reloc = FALSE;
2166 if (r_symndx < symtab_hdr->sh_info)
2167 {
2168 sym = local_syms + r_symndx;
2169 sec = local_sections[r_symndx];
2170
2171 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2172 {
2173 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2174 if (local_plt == NULL)
2175 return FALSE;
2176
2177 /* Address of the PLT slot. */
2178 relocation = (htab->elf.iplt->output_section->vma
2179 + htab->elf.iplt->output_offset
2180 + local_plt[r_symndx].plt.offset);
2181
2182 switch (r_type)
2183 {
2184 case R_390_PLTOFF16:
2185 case R_390_PLTOFF32:
2186 case R_390_PLTOFF64:
2187 relocation -= s390_got_pointer (info);
2188 break;
2189 case R_390_GOTPLT12:
2190 case R_390_GOTPLT16:
2191 case R_390_GOTPLT20:
2192 case R_390_GOTPLT32:
2193 case R_390_GOTPLT64:
2194 case R_390_GOTPLTENT:
2195 case R_390_GOT12:
2196 case R_390_GOT16:
2197 case R_390_GOT20:
2198 case R_390_GOT32:
2199 case R_390_GOT64:
2200 case R_390_GOTENT:
2201 {
2202 /* Write the PLT slot address into the GOT slot. */
2203 bfd_put_64 (output_bfd, relocation,
2204 htab->elf.sgot->contents +
2205 local_got_offsets[r_symndx]);
2206 relocation = (local_got_offsets[r_symndx] +
2207 s390_got_offset (info));
2208
2209 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2210 relocation += s390_got_pointer (info);
2211 break;
2212 }
2213 default:
2214 break;
2215 }
2216 /* The output section is needed later in
2217 finish_dynamic_section when creating the dynamic
2218 relocation. */
2219 local_plt[r_symndx].sec = sec;
2220 goto do_relocation;
2221 }
2222 else
2223 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2224 }
2225 else
2226 {
2227 bfd_boolean warned ATTRIBUTE_UNUSED;
2228 bfd_boolean ignored ATTRIBUTE_UNUSED;
2229
2230 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2231 r_symndx, symtab_hdr, sym_hashes,
2232 h, sec, relocation,
2233 unresolved_reloc, warned, ignored);
2234 }
2235
2236 if (sec != NULL && discarded_section (sec))
2237 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2238 rel, 1, relend, howto, 0, contents);
2239
2240 if (bfd_link_relocatable (info))
2241 continue;
2242
2243 resolved_to_zero = (h != NULL
2244 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2245
2246 switch (r_type)
2247 {
2248 case R_390_GOTPLT12:
2249 case R_390_GOTPLT16:
2250 case R_390_GOTPLT20:
2251 case R_390_GOTPLT32:
2252 case R_390_GOTPLT64:
2253 case R_390_GOTPLTENT:
2254 /* There are three cases for a GOTPLT relocation. 1) The
2255 relocation is against the jump slot entry of a plt that
2256 will get emitted to the output file. 2) The relocation
2257 is against the jump slot of a plt entry that has been
2258 removed. elf_s390_adjust_gotplt has created a GOT entry
2259 as replacement. 3) The relocation is against a local symbol.
2260 Cases 2) and 3) are the same as the GOT relocation code
2261 so we just have to test for case 1 and fall through for
2262 the other two. */
2263 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2264 {
2265 bfd_vma plt_index;
2266
2267 if (s390_is_ifunc_symbol_p (h))
2268 {
2269 /* Entry indices of .iplt and .igot.plt match
2270 1:1. No magic PLT first entry here. */
2271 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2272 relocation = (plt_index * GOT_ENTRY_SIZE
2273 + s390_gotplt_offset (info)
2274 + htab->elf.igotplt->output_offset);
2275 }
2276 else
2277 {
2278 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
2279 / PLT_ENTRY_SIZE);
2280
2281 relocation = (plt_index * GOT_ENTRY_SIZE
2282 + s390_gotplt_offset (info));
2283 }
2284 if (r_type == R_390_GOTPLTENT)
2285 relocation += s390_got_pointer (info);
2286 unresolved_reloc = FALSE;
2287 break;
2288 }
2289 /* Fall through. */
2290
2291 case R_390_GOT12:
2292 case R_390_GOT16:
2293 case R_390_GOT20:
2294 case R_390_GOT32:
2295 case R_390_GOT64:
2296 case R_390_GOTENT:
2297 /* Relocation is to the entry for this symbol in the global
2298 offset table. */
2299 if (htab->elf.sgot == NULL)
2300 abort ();
2301
2302 if (h != NULL)
2303 {
2304 bfd_boolean dyn;
2305
2306 off = h->got.offset;
2307 dyn = htab->elf.dynamic_sections_created;
2308
2309 if (s390_is_ifunc_symbol_p (h))
2310 {
2311 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2312 if (off == (bfd_vma)-1)
2313 {
2314 /* No explicit GOT usage so redirect to the
2315 got.iplt slot. */
2316 relocation = (s390_gotplt_offset (info)
2317 + htab->elf.igotplt->output_offset
2318 + (h->plt.offset / PLT_ENTRY_SIZE
2319 * GOT_ENTRY_SIZE));
2320
2321 /* For @GOTENT the relocation is against the offset between
2322 the instruction and the symbols entry in the GOT and not
2323 between the start of the GOT and the symbols entry. We
2324 add the vma of the GOT to get the correct value. */
2325 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2326 relocation += s390_got_pointer (info);
2327
2328 break;
2329 }
2330 else
2331 {
2332 /* Explicit GOT slots must contain the address
2333 of the PLT slot. This will be handled in
2334 finish_dynamic_symbol. */
2335 }
2336 }
2337 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2338 bfd_link_pic (info),
2339 h)
2340 || (bfd_link_pic (info)
2341 && SYMBOL_REFERENCES_LOCAL (info, h))
2342 || resolved_to_zero)
2343 {
2344 /* This is actually a static link, or it is a
2345 -Bsymbolic link and the symbol is defined
2346 locally, or the symbol was forced to be local
2347 because of a version file. We must initialize
2348 this entry in the global offset table. Since the
2349 offset must always be a multiple of 2, we use the
2350 least significant bit to record whether we have
2351 initialized it already.
2352
2353 When doing a dynamic link, we create a .rel.got
2354 relocation entry to initialize the value. This
2355 is done in the finish_dynamic_symbol routine. */
2356 if ((off & 1) != 0)
2357 off &= ~1;
2358 else
2359 {
2360 bfd_put_64 (output_bfd, relocation,
2361 htab->elf.sgot->contents + off);
2362 h->got.offset |= 1;
2363 }
2364
2365 if ((h->def_regular
2366 && bfd_link_pic (info)
2367 && SYMBOL_REFERENCES_LOCAL (info, h))
2368 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2369 && ((r_type == R_390_GOTENT
2370 && (bfd_get_16 (input_bfd,
2371 contents + rel->r_offset - 2)
2372 & 0xff0f) == 0xc408)
2373 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2374 || (r_type == R_390_GOT20
2375 && (bfd_get_32 (input_bfd,
2376 contents + rel->r_offset - 2)
2377 & 0xff00f000) == 0xe300c000
2378 && bfd_get_8 (input_bfd,
2379 contents + rel->r_offset + 3) == 0x04)))
2380
2381 {
2382 unsigned short new_insn =
2383 (0xc000 | (bfd_get_8 (input_bfd,
2384 contents + rel->r_offset - 1) & 0xf0));
2385 bfd_put_16 (output_bfd, new_insn,
2386 contents + rel->r_offset - 2);
2387 r_type = R_390_PC32DBL;
2388 rel->r_addend = 2;
2389 howto = elf_howto_table + r_type;
2390 relocation = h->root.u.def.value
2391 + h->root.u.def.section->output_section->vma
2392 + h->root.u.def.section->output_offset;
2393 goto do_relocation;
2394 }
2395 }
2396 else
2397 unresolved_reloc = FALSE;
2398 }
2399 else
2400 {
2401 if (local_got_offsets == NULL)
2402 abort ();
2403
2404 off = local_got_offsets[r_symndx];
2405
2406 /* The offset must always be a multiple of 8. We use
2407 the least significant bit to record whether we have
2408 already generated the necessary reloc. */
2409 if ((off & 1) != 0)
2410 off &= ~1;
2411 else
2412 {
2413 bfd_put_64 (output_bfd, relocation,
2414 htab->elf.sgot->contents + off);
2415
2416 if (bfd_link_pic (info))
2417 {
2418 asection *s;
2419 Elf_Internal_Rela outrel;
2420 bfd_byte *loc;
2421
2422 s = htab->elf.srelgot;
2423 if (s == NULL)
2424 abort ();
2425
2426 outrel.r_offset = (htab->elf.sgot->output_section->vma
2427 + htab->elf.sgot->output_offset
2428 + off);
2429 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2430 outrel.r_addend = relocation;
2431 loc = s->contents;
2432 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2433 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2434 }
2435
2436 local_got_offsets[r_symndx] |= 1;
2437 }
2438 }
2439
2440 if (off >= (bfd_vma) -2)
2441 abort ();
2442
2443 relocation = s390_got_offset (info) + off;
2444
2445 /* For @GOTENT the relocation is against the offset between
2446 the instruction and the symbols entry in the GOT and not
2447 between the start of the GOT and the symbols entry. We
2448 add the vma of the GOT to get the correct value. */
2449 if ( r_type == R_390_GOTENT
2450 || r_type == R_390_GOTPLTENT)
2451 relocation += s390_got_pointer (info);
2452
2453 break;
2454
2455 case R_390_GOTOFF16:
2456 case R_390_GOTOFF32:
2457 case R_390_GOTOFF64:
2458 /* Relocation is relative to the start of the global offset
2459 table. */
2460
2461 if (h != NULL
2462 && s390_is_ifunc_symbol_p (h)
2463 && h->def_regular
2464 && !bfd_link_executable (info))
2465 {
2466 relocation = (htab->elf.iplt->output_section->vma
2467 + htab->elf.iplt->output_offset
2468 + h->plt.offset
2469 - s390_got_pointer (info));
2470 goto do_relocation;
2471 }
2472
2473 relocation -= s390_got_pointer (info);
2474 break;
2475
2476 case R_390_GOTPC:
2477 case R_390_GOTPCDBL:
2478 /* Use global offset table as symbol value. */
2479 relocation = s390_got_pointer (info);
2480 unresolved_reloc = FALSE;
2481 break;
2482
2483 case R_390_PLT12DBL:
2484 case R_390_PLT16DBL:
2485 case R_390_PLT24DBL:
2486 case R_390_PLT32:
2487 case R_390_PLT32DBL:
2488 case R_390_PLT64:
2489 /* Relocation is to the entry for this symbol in the
2490 procedure linkage table. */
2491
2492 /* Resolve a PLT32 reloc against a local symbol directly,
2493 without using the procedure linkage table. */
2494 if (h == NULL)
2495 break;
2496
2497 if (h->plt.offset == (bfd_vma) -1
2498 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2499 {
2500 /* We didn't make a PLT entry for this symbol. This
2501 happens when statically linking PIC code, or when
2502 using -Bsymbolic. */
2503 break;
2504 }
2505 if (s390_is_ifunc_symbol_p (h))
2506 relocation = (htab->elf.iplt->output_section->vma
2507 + htab->elf.iplt->output_offset
2508 + h->plt.offset);
2509 else
2510 relocation = (htab->elf.splt->output_section->vma
2511 + htab->elf.splt->output_offset
2512 + h->plt.offset);
2513 unresolved_reloc = FALSE;
2514 break;
2515
2516 case R_390_PLTOFF16:
2517 case R_390_PLTOFF32:
2518 case R_390_PLTOFF64:
2519 /* Relocation is to the entry for this symbol in the
2520 procedure linkage table relative to the start of the GOT. */
2521
2522 /* For local symbols or if we didn't make a PLT entry for
2523 this symbol resolve the symbol directly. */
2524 if (h == NULL
2525 || h->plt.offset == (bfd_vma) -1
2526 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2527 {
2528 relocation -= s390_got_pointer (info);
2529 break;
2530 }
2531
2532 if (s390_is_ifunc_symbol_p (h))
2533 relocation = (htab->elf.iplt->output_section->vma
2534 + htab->elf.iplt->output_offset
2535 + h->plt.offset
2536 - s390_got_pointer (info));
2537 else
2538 relocation = (htab->elf.splt->output_section->vma
2539 + htab->elf.splt->output_offset
2540 + h->plt.offset
2541 - s390_got_pointer (info));
2542 unresolved_reloc = FALSE;
2543 break;
2544
2545 case R_390_PC16:
2546 case R_390_PC12DBL:
2547 case R_390_PC16DBL:
2548 case R_390_PC24DBL:
2549 case R_390_PC32:
2550 case R_390_PC32DBL:
2551 case R_390_PC64:
2552 if (h != NULL
2553 && bfd_link_pie (info)
2554 && !h->def_regular)
2555 {
2556 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2557 "in shared library and accessed "
2558 "from executable "
2559 "(rebuild file with -fPIC ?)"),
2560 input_bfd, h->root.root.string);
2561 bfd_set_error (bfd_error_bad_value);
2562 return FALSE;
2563 }
2564 /* The target of these relocs are instruction operands
2565 residing in read-only sections. We cannot emit a runtime
2566 reloc for it. */
2567 if (h != NULL
2568 && s390_is_ifunc_symbol_p (h)
2569 && h->def_regular
2570 && bfd_link_pic (info))
2571 {
2572 relocation = (htab->elf.iplt->output_section->vma
2573 + htab->elf.iplt->output_offset
2574 + h->plt.offset);
2575 goto do_relocation;
2576 }
2577 /* Fall through. */
2578
2579 case R_390_8:
2580 case R_390_16:
2581 case R_390_32:
2582 case R_390_64:
2583
2584 if ((input_section->flags & SEC_ALLOC) == 0)
2585 break;
2586
2587 if (h != NULL
2588 && s390_is_ifunc_symbol_p (h)
2589 && h->def_regular)
2590 {
2591 if (!bfd_link_pic (info))
2592 {
2593 /* For a non-shared object the symbol will not
2594 change. Hence we can write the address of the
2595 target IPLT slot now. */
2596 relocation = (htab->elf.iplt->output_section->vma
2597 + htab->elf.iplt->output_offset
2598 + h ->plt.offset);
2599 goto do_relocation;
2600 }
2601 else
2602 {
2603 /* For shared objects a runtime relocation is needed. */
2604
2605 Elf_Internal_Rela outrel;
2606 asection *sreloc;
2607
2608 /* Need a dynamic relocation to get the real function
2609 address. */
2610 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2611 info,
2612 input_section,
2613 rel->r_offset);
2614 if (outrel.r_offset == (bfd_vma) -1
2615 || outrel.r_offset == (bfd_vma) -2)
2616 abort ();
2617
2618 outrel.r_offset += (input_section->output_section->vma
2619 + input_section->output_offset);
2620
2621 if (h->dynindx == -1
2622 || h->forced_local
2623 || bfd_link_executable (info))
2624 {
2625 /* This symbol is resolved locally. */
2626 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2627 outrel.r_addend = (h->root.u.def.value
2628 + h->root.u.def.section->output_section->vma
2629 + h->root.u.def.section->output_offset);
2630 }
2631 else
2632 {
2633 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2634 outrel.r_addend = 0;
2635 }
2636
2637 sreloc = htab->elf.irelifunc;
2638 elf_append_rela (output_bfd, sreloc, &outrel);
2639
2640 /* If this reloc is against an external symbol, we
2641 do not want to fiddle with the addend. Otherwise,
2642 we need to include the symbol value so that it
2643 becomes an addend for the dynamic reloc. For an
2644 internal symbol, we have updated addend. */
2645 continue;
2646 }
2647 }
2648
2649 if ((bfd_link_pic (info)
2650 && (h == NULL
2651 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2652 && !resolved_to_zero)
2653 || h->root.type != bfd_link_hash_undefweak)
2654 && ((r_type != R_390_PC16
2655 && r_type != R_390_PC12DBL
2656 && r_type != R_390_PC16DBL
2657 && r_type != R_390_PC24DBL
2658 && r_type != R_390_PC32
2659 && r_type != R_390_PC32DBL
2660 && r_type != R_390_PC64)
2661 || !SYMBOL_CALLS_LOCAL (info, h)))
2662 || (ELIMINATE_COPY_RELOCS
2663 && !bfd_link_pic (info)
2664 && h != NULL
2665 && h->dynindx != -1
2666 && !h->non_got_ref
2667 && ((h->def_dynamic
2668 && !h->def_regular)
2669 || h->root.type == bfd_link_hash_undefweak
2670 || h->root.type == bfd_link_hash_undefined)))
2671 {
2672 Elf_Internal_Rela outrel;
2673 bfd_boolean skip, relocate;
2674 asection *sreloc;
2675 bfd_byte *loc;
2676
2677 /* When generating a shared object, these relocations
2678 are copied into the output file to be resolved at run
2679 time. */
2680 skip = FALSE;
2681 relocate = FALSE;
2682
2683 outrel.r_offset =
2684 _bfd_elf_section_offset (output_bfd, info, input_section,
2685 rel->r_offset);
2686 if (outrel.r_offset == (bfd_vma) -1)
2687 skip = TRUE;
2688 else if (outrel.r_offset == (bfd_vma) -2)
2689 skip = TRUE, relocate = TRUE;
2690
2691 outrel.r_offset += (input_section->output_section->vma
2692 + input_section->output_offset);
2693
2694 if (skip)
2695 memset (&outrel, 0, sizeof outrel);
2696 else if (h != NULL
2697 && h->dynindx != -1
2698 && (r_type == R_390_PC16
2699 || r_type == R_390_PC12DBL
2700 || r_type == R_390_PC16DBL
2701 || r_type == R_390_PC24DBL
2702 || r_type == R_390_PC32
2703 || r_type == R_390_PC32DBL
2704 || r_type == R_390_PC64
2705 || !bfd_link_pic (info)
2706 || !SYMBOLIC_BIND (info, h)
2707 || !h->def_regular))
2708 {
2709 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2710 outrel.r_addend = rel->r_addend;
2711 }
2712 else
2713 {
2714 /* This symbol is local, or marked to become local. */
2715 outrel.r_addend = relocation + rel->r_addend;
2716 if (r_type == R_390_64)
2717 {
2718 relocate = TRUE;
2719 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2720 }
2721 else
2722 {
2723 long sindx;
2724
2725 if (bfd_is_abs_section (sec))
2726 sindx = 0;
2727 else if (sec == NULL || sec->owner == NULL)
2728 {
2729 bfd_set_error(bfd_error_bad_value);
2730 return FALSE;
2731 }
2732 else
2733 {
2734 asection *osec;
2735
2736 osec = sec->output_section;
2737 sindx = elf_section_data (osec)->dynindx;
2738
2739 if (sindx == 0)
2740 {
2741 osec = htab->elf.text_index_section;
2742 sindx = elf_section_data (osec)->dynindx;
2743 }
2744 BFD_ASSERT (sindx != 0);
2745
2746 /* We are turning this relocation into one
2747 against a section symbol, so subtract out
2748 the output section's address but not the
2749 offset of the input section in the output
2750 section. */
2751 outrel.r_addend -= osec->vma;
2752 }
2753 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2754 }
2755 }
2756
2757 sreloc = elf_section_data (input_section)->sreloc;
2758 if (sreloc == NULL)
2759 abort ();
2760
2761 loc = sreloc->contents;
2762 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2763 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2764
2765 /* If this reloc is against an external symbol, we do
2766 not want to fiddle with the addend. Otherwise, we
2767 need to include the symbol value so that it becomes
2768 an addend for the dynamic reloc. */
2769 if (! relocate)
2770 continue;
2771 }
2772
2773 break;
2774
2775 /* Relocations for tls literal pool entries. */
2776 case R_390_TLS_IE64:
2777 if (bfd_link_pic (info))
2778 {
2779 Elf_Internal_Rela outrel;
2780 asection *sreloc;
2781 bfd_byte *loc;
2782
2783 outrel.r_offset = rel->r_offset
2784 + input_section->output_section->vma
2785 + input_section->output_offset;
2786 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2787 sreloc = elf_section_data (input_section)->sreloc;
2788 if (sreloc == NULL)
2789 abort ();
2790 loc = sreloc->contents;
2791 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2792 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2793 }
2794 /* Fall through. */
2795
2796 case R_390_TLS_GD64:
2797 case R_390_TLS_GOTIE64:
2798 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2799 tls_type = GOT_UNKNOWN;
2800 if (h == NULL && local_got_offsets)
2801 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2802 else if (h != NULL)
2803 {
2804 tls_type = elf_s390_hash_entry(h)->tls_type;
2805 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2806 r_type = R_390_TLS_LE64;
2807 }
2808 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2809 r_type = R_390_TLS_IE64;
2810
2811 if (r_type == R_390_TLS_LE64)
2812 {
2813 /* This relocation gets optimized away by the local exec
2814 access optimization. */
2815 BFD_ASSERT (! unresolved_reloc);
2816 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2817 contents + rel->r_offset);
2818 continue;
2819 }
2820
2821 if (htab->elf.sgot == NULL)
2822 abort ();
2823
2824 if (h != NULL)
2825 off = h->got.offset;
2826 else
2827 {
2828 if (local_got_offsets == NULL)
2829 abort ();
2830
2831 off = local_got_offsets[r_symndx];
2832 }
2833
2834 emit_tls_relocs:
2835
2836 if ((off & 1) != 0)
2837 off &= ~1;
2838 else
2839 {
2840 Elf_Internal_Rela outrel;
2841 bfd_byte *loc;
2842 int dr_type, indx;
2843
2844 if (htab->elf.srelgot == NULL)
2845 abort ();
2846
2847 outrel.r_offset = (htab->elf.sgot->output_section->vma
2848 + htab->elf.sgot->output_offset + off);
2849
2850 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2851 if (r_type == R_390_TLS_GD64)
2852 dr_type = R_390_TLS_DTPMOD;
2853 else
2854 dr_type = R_390_TLS_TPOFF;
2855 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2856 outrel.r_addend = relocation - dtpoff_base (info);
2857 else
2858 outrel.r_addend = 0;
2859 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2860 loc = htab->elf.srelgot->contents;
2861 loc += htab->elf.srelgot->reloc_count++
2862 * sizeof (Elf64_External_Rela);
2863 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2864
2865 if (r_type == R_390_TLS_GD64)
2866 {
2867 if (indx == 0)
2868 {
2869 BFD_ASSERT (! unresolved_reloc);
2870 bfd_put_64 (output_bfd,
2871 relocation - dtpoff_base (info),
2872 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2873 }
2874 else
2875 {
2876 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2877 outrel.r_offset += GOT_ENTRY_SIZE;
2878 outrel.r_addend = 0;
2879 htab->elf.srelgot->reloc_count++;
2880 loc += sizeof (Elf64_External_Rela);
2881 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2882 }
2883 }
2884
2885 if (h != NULL)
2886 h->got.offset |= 1;
2887 else
2888 local_got_offsets[r_symndx] |= 1;
2889 }
2890
2891 if (off >= (bfd_vma) -2)
2892 abort ();
2893 if (r_type == ELF64_R_TYPE (rel->r_info))
2894 {
2895 relocation = htab->elf.sgot->output_offset + off;
2896 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2897 relocation += htab->elf.sgot->output_section->vma;
2898 unresolved_reloc = FALSE;
2899 }
2900 else
2901 {
2902 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2903 contents + rel->r_offset);
2904 continue;
2905 }
2906 break;
2907
2908 case R_390_TLS_GOTIE12:
2909 case R_390_TLS_GOTIE20:
2910 case R_390_TLS_IEENT:
2911 if (h == NULL)
2912 {
2913 if (local_got_offsets == NULL)
2914 abort();
2915 off = local_got_offsets[r_symndx];
2916 if (bfd_link_pic (info))
2917 goto emit_tls_relocs;
2918 }
2919 else
2920 {
2921 off = h->got.offset;
2922 tls_type = elf_s390_hash_entry(h)->tls_type;
2923 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2924 goto emit_tls_relocs;
2925 }
2926
2927 if (htab->elf.sgot == NULL)
2928 abort ();
2929
2930 BFD_ASSERT (! unresolved_reloc);
2931 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2932 htab->elf.sgot->contents + off);
2933 relocation = htab->elf.sgot->output_offset + off;
2934 if (r_type == R_390_TLS_IEENT)
2935 relocation += htab->elf.sgot->output_section->vma;
2936 unresolved_reloc = FALSE;
2937 break;
2938
2939 case R_390_TLS_LDM64:
2940 if (! bfd_link_pic (info))
2941 /* The literal pool entry this relocation refers to gets ignored
2942 by the optimized code of the local exec model. Do nothing
2943 and the value will turn out zero. */
2944 continue;
2945
2946 if (htab->elf.sgot == NULL)
2947 abort ();
2948
2949 off = htab->tls_ldm_got.offset;
2950 if (off & 1)
2951 off &= ~1;
2952 else
2953 {
2954 Elf_Internal_Rela outrel;
2955 bfd_byte *loc;
2956
2957 if (htab->elf.srelgot == NULL)
2958 abort ();
2959
2960 outrel.r_offset = (htab->elf.sgot->output_section->vma
2961 + htab->elf.sgot->output_offset + off);
2962
2963 bfd_put_64 (output_bfd, 0,
2964 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2965 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2966 outrel.r_addend = 0;
2967 loc = htab->elf.srelgot->contents;
2968 loc += htab->elf.srelgot->reloc_count++
2969 * sizeof (Elf64_External_Rela);
2970 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2971 htab->tls_ldm_got.offset |= 1;
2972 }
2973 relocation = htab->elf.sgot->output_offset + off;
2974 unresolved_reloc = FALSE;
2975 break;
2976
2977 case R_390_TLS_LE64:
2978 if (bfd_link_dll (info))
2979 {
2980 /* Linking a shared library with non-fpic code requires
2981 a R_390_TLS_TPOFF relocation. */
2982 Elf_Internal_Rela outrel;
2983 asection *sreloc;
2984 bfd_byte *loc;
2985 int indx;
2986
2987 outrel.r_offset = rel->r_offset
2988 + input_section->output_section->vma
2989 + input_section->output_offset;
2990 if (h != NULL && h->dynindx != -1)
2991 indx = h->dynindx;
2992 else
2993 indx = 0;
2994 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2995 if (indx == 0)
2996 outrel.r_addend = relocation - dtpoff_base (info);
2997 else
2998 outrel.r_addend = 0;
2999 sreloc = elf_section_data (input_section)->sreloc;
3000 if (sreloc == NULL)
3001 abort ();
3002 loc = sreloc->contents;
3003 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3004 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3005 }
3006 else
3007 {
3008 BFD_ASSERT (! unresolved_reloc);
3009 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3010 contents + rel->r_offset);
3011 }
3012 continue;
3013
3014 case R_390_TLS_LDO64:
3015 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3016 relocation -= dtpoff_base (info);
3017 else
3018 /* When converting LDO to LE, we must negate. */
3019 relocation = -tpoff (info, relocation);
3020 break;
3021
3022 /* Relocations for tls instructions. */
3023 case R_390_TLS_LOAD:
3024 case R_390_TLS_GDCALL:
3025 case R_390_TLS_LDCALL:
3026 tls_type = GOT_UNKNOWN;
3027 if (h == NULL && local_got_offsets)
3028 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3029 else if (h != NULL)
3030 tls_type = elf_s390_hash_entry(h)->tls_type;
3031
3032 if (tls_type == GOT_TLS_GD)
3033 continue;
3034
3035 if (r_type == R_390_TLS_LOAD)
3036 {
3037 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3038 {
3039 /* IE->LE transition. Four valid cases:
3040 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3041 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3042 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3043 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3044 unsigned int insn0, insn1, ry;
3045
3046 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3047 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3048 if (insn1 != 0x0004)
3049 {
3050 invalid_tls_insn (input_bfd, input_section, rel);
3051 return FALSE;
3052 }
3053 if ((insn0 & 0xff00f000) == 0xe3000000)
3054 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3055 ry = (insn0 & 0x000f0000);
3056 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3057 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3058 ry = (insn0 & 0x0000f000) << 4;
3059 else if ((insn0 & 0xff00f000) == 0xe300c000)
3060 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3061 ry = (insn0 & 0x000f0000);
3062 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3063 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3064 ry = (insn0 & 0x0000f000) << 4;
3065 else
3066 {
3067 invalid_tls_insn (input_bfd, input_section, rel);
3068 return FALSE;
3069 }
3070 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3071 insn1 = 0x000d;
3072 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3073 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3074 }
3075 }
3076 else if (r_type == R_390_TLS_GDCALL)
3077 {
3078 unsigned int insn0, insn1;
3079
3080 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3081 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3082 if ((insn0 & 0xffff0000) != 0xc0e50000)
3083 {
3084 invalid_tls_insn (input_bfd, input_section, rel);
3085 return FALSE;
3086 }
3087 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3088 {
3089 /* GD->LE transition.
3090 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3091 insn0 = 0xc0040000;
3092 insn1 = 0x0000;
3093 }
3094 else
3095 {
3096 /* GD->IE transition.
3097 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3098 insn0 = 0xe322c000;
3099 insn1 = 0x0004;
3100 }
3101 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3102 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3103 }
3104 else if (r_type == R_390_TLS_LDCALL)
3105 {
3106 if (!bfd_link_pic (info))
3107 {
3108 unsigned int insn0, insn1;
3109
3110 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3111 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3112 if ((insn0 & 0xffff0000) != 0xc0e50000)
3113 {
3114 invalid_tls_insn (input_bfd, input_section, rel);
3115 return FALSE;
3116 }
3117 /* LD->LE transition.
3118 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3119 insn0 = 0xc0040000;
3120 insn1 = 0x0000;
3121 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3122 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3123 }
3124 }
3125 continue;
3126
3127 default:
3128 break;
3129 }
3130
3131 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3132 because such sections are not SEC_ALLOC and thus ld.so will
3133 not process them. */
3134 if (unresolved_reloc
3135 && !((input_section->flags & SEC_DEBUGGING) != 0
3136 && h->def_dynamic)
3137 && _bfd_elf_section_offset (output_bfd, info, input_section,
3138 rel->r_offset) != (bfd_vma) -1)
3139 _bfd_error_handler
3140 /* xgettext:c-format */
3141 (_("%pB(%pA+%#" PRIx64 "): "
3142 "unresolvable %s relocation against symbol `%s'"),
3143 input_bfd,
3144 input_section,
3145 (uint64_t) rel->r_offset,
3146 howto->name,
3147 h->root.root.string);
3148
3149 do_relocation:
3150
3151 /* When applying a 24 bit reloc we need to start one byte
3152 earlier. Otherwise the 32 bit get/put bfd operations might
3153 access a byte after the actual section. */
3154 if (r_type == R_390_PC24DBL
3155 || r_type == R_390_PLT24DBL)
3156 rel->r_offset--;
3157
3158 if (r_type == R_390_20
3159 || r_type == R_390_GOT20
3160 || r_type == R_390_GOTPLT20
3161 || r_type == R_390_TLS_GOTIE20)
3162 {
3163 relocation += rel->r_addend;
3164 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3165 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3166 contents, rel->r_offset,
3167 relocation, 0);
3168 }
3169 else
3170 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3171 contents, rel->r_offset,
3172 relocation, rel->r_addend);
3173
3174 if (r != bfd_reloc_ok)
3175 {
3176 const char *name;
3177
3178 if (h != NULL)
3179 name = h->root.root.string;
3180 else
3181 {
3182 name = bfd_elf_string_from_elf_section (input_bfd,
3183 symtab_hdr->sh_link,
3184 sym->st_name);
3185 if (name == NULL)
3186 return FALSE;
3187 if (*name == '\0')
3188 name = bfd_section_name (input_bfd, sec);
3189 }
3190
3191 if (r == bfd_reloc_overflow)
3192 (*info->callbacks->reloc_overflow)
3193 (info, (h ? &h->root : NULL), name, howto->name,
3194 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3195 else
3196 {
3197 _bfd_error_handler
3198 /* xgettext:c-format */
3199 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3200 input_bfd, input_section,
3201 (uint64_t) rel->r_offset, name, (int) r);
3202 return FALSE;
3203 }
3204 }
3205 }
3206
3207 return TRUE;
3208 }
3209
3210 /* Generate the PLT slots together with the dynamic relocations needed
3211 for IFUNC symbols. */
3212
3213 static void
3214 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3215 struct bfd_link_info *info,
3216 struct elf_link_hash_entry *h,
3217 struct elf_s390_link_hash_table *htab,
3218 bfd_vma plt_offset,
3219 bfd_vma resolver_address)
3220 {
3221 bfd_vma plt_index;
3222 bfd_vma got_offset;
3223 Elf_Internal_Rela rela;
3224 bfd_byte *loc;
3225 asection *plt, *gotplt, *relplt;
3226
3227 if (htab->elf.iplt == NULL
3228 || htab->elf.igotplt == NULL
3229 || htab->elf.irelplt == NULL)
3230 abort ();
3231
3232 /* Index of the PLT slot within iplt section. */
3233 plt_index = plt_offset / PLT_ENTRY_SIZE;
3234 plt = htab->elf.iplt;
3235 /* Offset into the igot.plt section. */
3236 got_offset = plt_index * GOT_ENTRY_SIZE;
3237 gotplt = htab->elf.igotplt;
3238 relplt = htab->elf.irelplt;
3239
3240 /* Fill in the blueprint of a PLT. */
3241 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3242 PLT_ENTRY_SIZE);
3243
3244 /* Fixup the relative address to the GOT entry */
3245 bfd_put_32 (output_bfd,
3246 (gotplt->output_section->vma +
3247 gotplt->output_offset + got_offset
3248 - (plt->output_section->vma +
3249 plt->output_offset +
3250 plt_offset))/2,
3251 plt->contents + plt_offset + 2);
3252 /* Fixup the relative branch to PLT 0 */
3253 bfd_put_32 (output_bfd, - (plt->output_offset +
3254 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3255 plt->contents + plt_offset + 24);
3256 /* Fixup offset into .rela.plt section. */
3257 bfd_put_32 (output_bfd, relplt->output_offset +
3258 plt_index * sizeof (Elf64_External_Rela),
3259 plt->contents + plt_offset + 28);
3260
3261 /* Fill in the entry in the global offset table.
3262 Points to instruction after GOT offset. */
3263 bfd_put_64 (output_bfd,
3264 (plt->output_section->vma
3265 + plt->output_offset
3266 + plt_offset
3267 + 14),
3268 gotplt->contents + got_offset);
3269
3270 /* Fill in the entry in the .rela.plt section. */
3271 rela.r_offset = (gotplt->output_section->vma
3272 + gotplt->output_offset
3273 + got_offset);
3274
3275 if (!h
3276 || h->dynindx == -1
3277 || ((bfd_link_executable (info)
3278 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3279 && h->def_regular))
3280 {
3281 /* The symbol can be locally resolved. */
3282 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3283 rela.r_addend = resolver_address;
3284 }
3285 else
3286 {
3287 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3288 rela.r_addend = 0;
3289 }
3290
3291 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3292 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3293 }
3294
3295
3296 /* Finish up dynamic symbol handling. We set the contents of various
3297 dynamic sections here. */
3298
3299 static bfd_boolean
3300 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3301 struct bfd_link_info *info,
3302 struct elf_link_hash_entry *h,
3303 Elf_Internal_Sym *sym)
3304 {
3305 struct elf_s390_link_hash_table *htab;
3306 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3307
3308 htab = elf_s390_hash_table (info);
3309 if (htab == NULL)
3310 return FALSE;
3311
3312 if (h->plt.offset != (bfd_vma) -1)
3313 {
3314 bfd_vma plt_index;
3315 bfd_vma gotplt_offset;
3316 Elf_Internal_Rela rela;
3317 bfd_byte *loc;
3318
3319 /* This symbol has an entry in the procedure linkage table. Set
3320 it up. */
3321 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3322 {
3323 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3324 htab, h->plt.offset,
3325 eh->ifunc_resolver_address +
3326 eh->ifunc_resolver_section->output_offset +
3327 eh->ifunc_resolver_section->output_section->vma);
3328
3329 /* Do not return yet. Handling of explicit GOT slots of
3330 IFUNC symbols is below. */
3331 }
3332 else
3333 {
3334 if (h->dynindx == -1
3335 || htab->elf.splt == NULL
3336 || htab->elf.sgotplt == NULL
3337 || htab->elf.srelplt == NULL)
3338 abort ();
3339
3340 /* Calc. index no.
3341 Current offset - size first entry / entry size. */
3342 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3343
3344 /* The slots in the .got.plt correspond to the PLT slots in
3345 the same order. */
3346 gotplt_offset = plt_index * GOT_ENTRY_SIZE;
3347
3348 /* If .got.plt comes first it needs to contain the 3 header
3349 entries. */
3350 if (!s390_gotplt_after_got_p (info))
3351 gotplt_offset += 3 * GOT_ENTRY_SIZE;
3352
3353 /* Fill in the blueprint of a PLT. */
3354 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3355 PLT_ENTRY_SIZE);
3356
3357 /* The first instruction in the PLT entry is a LARL loading
3358 the address of the GOT slot. We write the 4 byte
3359 immediate operand of the LARL instruction here. */
3360 bfd_put_32 (output_bfd,
3361 (htab->elf.sgotplt->output_section->vma +
3362 htab->elf.sgotplt->output_offset + gotplt_offset
3363 - (htab->elf.splt->output_section->vma +
3364 htab->elf.splt->output_offset +
3365 h->plt.offset))/2,
3366 htab->elf.splt->contents + h->plt.offset + 2);
3367 /* Fixup the relative branch to PLT 0 */
3368 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3369 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3370 htab->elf.splt->contents + h->plt.offset + 24);
3371 /* Fixup offset into .rela.plt section. */
3372 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3373 htab->elf.splt->contents + h->plt.offset + 28);
3374
3375 /* Fill in the entry in the global offset table.
3376 Points to instruction after GOT offset. */
3377 bfd_put_64 (output_bfd,
3378 (htab->elf.splt->output_section->vma
3379 + htab->elf.splt->output_offset
3380 + h->plt.offset
3381 + 14),
3382 htab->elf.sgotplt->contents + gotplt_offset);
3383
3384 /* Fill in the entry in the .rela.plt section. */
3385 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3386 + htab->elf.sgotplt->output_offset
3387 + gotplt_offset);
3388 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3389 rela.r_addend = 0;
3390 loc = htab->elf.srelplt->contents + plt_index *
3391 sizeof (Elf64_External_Rela);
3392 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3393
3394 if (!h->def_regular)
3395 {
3396 /* Mark the symbol as undefined, rather than as defined in
3397 the .plt section. Leave the value alone. This is a clue
3398 for the dynamic linker, to make function pointer
3399 comparisons work between an application and shared
3400 library. */
3401 sym->st_shndx = SHN_UNDEF;
3402 }
3403 }
3404 }
3405
3406 if (h->got.offset != (bfd_vma) -1
3407 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3408 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3409 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3410 {
3411 Elf_Internal_Rela rela;
3412 bfd_byte *loc;
3413
3414 /* This symbol has an entry in the global offset table. Set it
3415 up. */
3416 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3417 abort ();
3418
3419 rela.r_offset = (htab->elf.sgot->output_section->vma
3420 + htab->elf.sgot->output_offset
3421 + (h->got.offset &~ (bfd_vma) 1));
3422
3423 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3424 {
3425 if (bfd_link_pic (info))
3426 {
3427 /* An explicit GOT slot usage needs GLOB_DAT. If the
3428 symbol references local the implicit got.iplt slot
3429 will be used and the IRELATIVE reloc has been created
3430 above. */
3431 goto do_glob_dat;
3432 }
3433 else
3434 {
3435 /* For non-shared objects explicit GOT slots must be
3436 filled with the PLT slot address for pointer
3437 equality reasons. */
3438 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3439 + htab->elf.iplt->output_offset
3440 + h->plt.offset),
3441 htab->elf.sgot->contents + h->got.offset);
3442 return TRUE;
3443 }
3444 }
3445 else if (bfd_link_pic (info)
3446 && SYMBOL_REFERENCES_LOCAL (info, h))
3447 {
3448 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3449 return TRUE;
3450
3451 /* If this is a static link, or it is a -Bsymbolic link and
3452 the symbol is defined locally or was forced to be local
3453 because of a version file, we just want to emit a
3454 RELATIVE reloc. The entry in the global offset table
3455 will already have been initialized in the
3456 relocate_section function. */
3457 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3458 return FALSE;
3459 BFD_ASSERT((h->got.offset & 1) != 0);
3460 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3461 rela.r_addend = (h->root.u.def.value
3462 + h->root.u.def.section->output_section->vma
3463 + h->root.u.def.section->output_offset);
3464 }
3465 else
3466 {
3467 BFD_ASSERT((h->got.offset & 1) == 0);
3468 do_glob_dat:
3469 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3470 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3471 rela.r_addend = 0;
3472 }
3473
3474 loc = htab->elf.srelgot->contents;
3475 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3476 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3477 }
3478
3479 if (h->needs_copy)
3480 {
3481 Elf_Internal_Rela rela;
3482 asection *s;
3483 bfd_byte *loc;
3484
3485 /* This symbols needs a copy reloc. Set it up. */
3486
3487 if (h->dynindx == -1
3488 || (h->root.type != bfd_link_hash_defined
3489 && h->root.type != bfd_link_hash_defweak)
3490 || htab->elf.srelbss == NULL)
3491 abort ();
3492
3493 rela.r_offset = (h->root.u.def.value
3494 + h->root.u.def.section->output_section->vma
3495 + h->root.u.def.section->output_offset);
3496 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3497 rela.r_addend = 0;
3498 if (h->root.u.def.section == htab->elf.sdynrelro)
3499 s = htab->elf.sreldynrelro;
3500 else
3501 s = htab->elf.srelbss;
3502 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3503 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3504 }
3505
3506 /* Mark some specially defined symbols as absolute. */
3507 if (h == htab->elf.hdynamic
3508 || h == htab->elf.hgot
3509 || h == htab->elf.hplt)
3510 sym->st_shndx = SHN_ABS;
3511
3512 return TRUE;
3513 }
3514
3515 /* Used to decide how to sort relocs in an optimal manner for the
3516 dynamic linker, before writing them out. */
3517
3518 static enum elf_reloc_type_class
3519 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3520 const asection *rel_sec ATTRIBUTE_UNUSED,
3521 const Elf_Internal_Rela *rela)
3522 {
3523 bfd *abfd = info->output_bfd;
3524 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3525 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3526 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3527 Elf_Internal_Sym sym;
3528
3529 if (htab->elf.dynsym == NULL
3530 || !bed->s->swap_symbol_in (abfd,
3531 (htab->elf.dynsym->contents
3532 + r_symndx * bed->s->sizeof_sym),
3533 0, &sym))
3534 abort ();
3535
3536 /* Check relocation against STT_GNU_IFUNC symbol. */
3537 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3538 return reloc_class_ifunc;
3539
3540 switch ((int) ELF64_R_TYPE (rela->r_info))
3541 {
3542 case R_390_RELATIVE:
3543 return reloc_class_relative;
3544 case R_390_JMP_SLOT:
3545 return reloc_class_plt;
3546 case R_390_COPY:
3547 return reloc_class_copy;
3548 default:
3549 return reloc_class_normal;
3550 }
3551 }
3552
3553 /* Finish up the dynamic sections. */
3554
3555 static bfd_boolean
3556 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3557 struct bfd_link_info *info)
3558 {
3559 struct elf_s390_link_hash_table *htab;
3560 bfd *dynobj;
3561 asection *sdyn;
3562 bfd *ibfd;
3563 unsigned int i;
3564
3565 htab = elf_s390_hash_table (info);
3566 if (htab == NULL)
3567 return FALSE;
3568
3569 dynobj = htab->elf.dynobj;
3570 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3571
3572 if (htab->elf.dynamic_sections_created)
3573 {
3574 Elf64_External_Dyn *dyncon, *dynconend;
3575
3576 if (sdyn == NULL || htab->elf.sgot == NULL)
3577 abort ();
3578
3579 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3580 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3581 for (; dyncon < dynconend; dyncon++)
3582 {
3583 Elf_Internal_Dyn dyn;
3584 asection *s;
3585
3586 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3587
3588 switch (dyn.d_tag)
3589 {
3590 default:
3591 continue;
3592
3593 case DT_PLTGOT:
3594 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3595 dyn.d_un.d_ptr = s390_got_pointer (info);
3596 break;
3597
3598 case DT_JMPREL:
3599 s = htab->elf.srelplt;
3600 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3601 break;
3602
3603 case DT_PLTRELSZ:
3604 dyn.d_un.d_val = htab->elf.srelplt->size;
3605 if (htab->elf.irelplt)
3606 dyn.d_un.d_val += htab->elf.irelplt->size;
3607 break;
3608
3609 case DT_RELASZ:
3610 /* The procedure linkage table relocs (DT_JMPREL) should
3611 not be included in the overall relocs (DT_RELA).
3612 Therefore, we override the DT_RELASZ entry here to
3613 make it not include the JMPREL relocs. Since the
3614 linker script arranges for .rela.plt to follow all
3615 other relocation sections, we don't have to worry
3616 about changing the DT_RELA entry. */
3617 dyn.d_un.d_val -= htab->elf.srelplt->size;
3618 if (htab->elf.irelplt)
3619 dyn.d_un.d_val -= htab->elf.irelplt->size;
3620 break;
3621 }
3622
3623 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3624 }
3625
3626 /* Fill in the special first entry in the procedure linkage table. */
3627 if (htab->elf.splt && htab->elf.splt->size > 0)
3628 {
3629 /* fill in blueprint for plt 0 entry */
3630 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3631 PLT_FIRST_ENTRY_SIZE);
3632 /* The second instruction in the first PLT entry is a LARL
3633 loading the GOT pointer. Fill in the LARL immediate
3634 address. */
3635 bfd_put_32 (output_bfd,
3636 (s390_got_pointer (info)
3637 - htab->elf.splt->output_section->vma
3638 - htab->elf.splt->output_offset - 6)/2,
3639 htab->elf.splt->contents + 8);
3640 }
3641 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3642 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3643 = PLT_ENTRY_SIZE;
3644 }
3645
3646 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
3647 {
3648 /* Fill in the first three entries in the global offset table. */
3649 if (htab->elf.hgot->root.u.def.section->size > 0)
3650 {
3651 bfd_put_64 (output_bfd,
3652 (sdyn == NULL ? (bfd_vma) 0
3653 : sdyn->output_section->vma + sdyn->output_offset),
3654 htab->elf.hgot->root.u.def.section->contents);
3655 /* One entry for shared object struct ptr. */
3656 bfd_put_64 (output_bfd, (bfd_vma) 0,
3657 htab->elf.hgot->root.u.def.section->contents + 8);
3658 /* One entry for _dl_runtime_resolve. */
3659 bfd_put_64 (output_bfd, (bfd_vma) 0,
3660 htab->elf.hgot->root.u.def.section->contents + 16);
3661 }
3662 elf_section_data (htab->elf.sgot->output_section)
3663 ->this_hdr.sh_entsize = 8;
3664 }
3665
3666 /* Finish dynamic symbol for local IFUNC symbols. */
3667 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3668 {
3669 struct plt_entry *local_plt;
3670 Elf_Internal_Sym *isym;
3671 Elf_Internal_Shdr *symtab_hdr;
3672
3673 symtab_hdr = &elf_symtab_hdr (ibfd);
3674
3675 if (!is_s390_elf (ibfd))
3676 continue;
3677
3678 local_plt = elf_s390_local_plt (ibfd);
3679 if (local_plt != NULL)
3680 for (i = 0; i < symtab_hdr->sh_info; i++)
3681 {
3682 if (local_plt[i].plt.offset != (bfd_vma) -1)
3683 {
3684 asection *sec = local_plt[i].sec;
3685 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3686 if (isym == NULL)
3687 return FALSE;
3688
3689 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3690 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3691 local_plt[i].plt.offset,
3692 isym->st_value
3693 + sec->output_section->vma
3694 + sec->output_offset);
3695
3696 }
3697 }
3698 }
3699
3700 return TRUE;
3701 }
3702 \f
3703 /* Support for core dump NOTE sections. */
3704
3705 static bfd_boolean
3706 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3707 {
3708 int offset;
3709 size_t size;
3710
3711 switch (note->descsz)
3712 {
3713 default:
3714 return FALSE;
3715
3716 case 336: /* sizeof(struct elf_prstatus) on s390x */
3717 /* pr_cursig */
3718 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3719
3720 /* pr_pid */
3721 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3722
3723 /* pr_reg */
3724 offset = 112;
3725 size = 216;
3726 break;
3727 }
3728
3729 /* Make a ".reg/999" section. */
3730 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3731 size, note->descpos + offset);
3732 }
3733
3734 static bfd_boolean
3735 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3736 {
3737 switch (note->descsz)
3738 {
3739 default:
3740 return FALSE;
3741
3742 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3743 elf_tdata (abfd)->core->pid
3744 = bfd_get_32 (abfd, note->descdata + 24);
3745 elf_tdata (abfd)->core->program
3746 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3747 elf_tdata (abfd)->core->command
3748 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3749 }
3750
3751 /* Note that for some reason, a spurious space is tacked
3752 onto the end of the args in some (at least one anyway)
3753 implementations, so strip it off if it exists. */
3754
3755 {
3756 char *command = elf_tdata (abfd)->core->command;
3757 int n = strlen (command);
3758
3759 if (0 < n && command[n - 1] == ' ')
3760 command[n - 1] = '\0';
3761 }
3762
3763 return TRUE;
3764 }
3765
3766 static char *
3767 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3768 int note_type, ...)
3769 {
3770 va_list ap;
3771
3772 switch (note_type)
3773 {
3774 default:
3775 return NULL;
3776
3777 case NT_PRPSINFO:
3778 {
3779 char data[136] ATTRIBUTE_NONSTRING = { 0 };
3780 const char *fname, *psargs;
3781
3782 va_start (ap, note_type);
3783 fname = va_arg (ap, const char *);
3784 psargs = va_arg (ap, const char *);
3785 va_end (ap);
3786
3787 strncpy (data + 40, fname, 16);
3788 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3789 DIAGNOSTIC_PUSH;
3790 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3791 -Wstringop-truncation:
3792 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3793 */
3794 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3795 #endif
3796 strncpy (data + 56, psargs, 80);
3797 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3798 DIAGNOSTIC_POP;
3799 #endif
3800 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3801 &data, sizeof (data));
3802 }
3803
3804 case NT_PRSTATUS:
3805 {
3806 char data[336] = { 0 };
3807 long pid;
3808 int cursig;
3809 const void *gregs;
3810
3811 va_start (ap, note_type);
3812 pid = va_arg (ap, long);
3813 cursig = va_arg (ap, int);
3814 gregs = va_arg (ap, const void *);
3815 va_end (ap);
3816
3817 bfd_put_16 (abfd, cursig, data + 12);
3818 bfd_put_32 (abfd, pid, data + 32);
3819 memcpy (data + 112, gregs, 216);
3820 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3821 &data, sizeof (data));
3822 }
3823 }
3824 /* NOTREACHED */
3825 }
3826 \f
3827 /* Return address for Ith PLT stub in section PLT, for relocation REL
3828 or (bfd_vma) -1 if it should not be included. */
3829
3830 static bfd_vma
3831 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3832 const arelent *rel ATTRIBUTE_UNUSED)
3833 {
3834 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3835 }
3836
3837 /* Merge backend specific data from an object file to the output
3838 object file when linking. */
3839
3840 static bfd_boolean
3841 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3842 {
3843 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3844 return TRUE;
3845
3846 return elf_s390_merge_obj_attributes (ibfd, info);
3847 }
3848
3849 /* We may add a PT_S390_PGSTE program header. */
3850
3851 static int
3852 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3853 struct bfd_link_info *info)
3854 {
3855 struct elf_s390_link_hash_table *htab;
3856
3857 if (info)
3858 {
3859 htab = elf_s390_hash_table (info);
3860 if (htab)
3861 return htab->params->pgste;
3862 }
3863 return 0;
3864 }
3865
3866
3867 /* Add the PT_S390_PGSTE program header. */
3868
3869 static bfd_boolean
3870 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3871 {
3872 struct elf_s390_link_hash_table *htab;
3873 struct elf_segment_map *m, *pm = NULL;
3874
3875 if (!abfd || !info)
3876 return TRUE;
3877
3878 htab = elf_s390_hash_table (info);
3879 if (!htab || !htab->params->pgste)
3880 return TRUE;
3881
3882 /* If there is already a PT_S390_PGSTE header, avoid adding
3883 another. */
3884 m = elf_seg_map (abfd);
3885 while (m && m->p_type != PT_S390_PGSTE)
3886 {
3887 pm = m;
3888 m = m->next;
3889 }
3890
3891 if (m)
3892 return TRUE;
3893
3894 m = (struct elf_segment_map *)
3895 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3896 if (m == NULL)
3897 return FALSE;
3898 m->p_type = PT_S390_PGSTE;
3899 m->count = 0;
3900 m->next = NULL;
3901 if (pm)
3902 pm->next = m;
3903
3904 return TRUE;
3905 }
3906
3907 bfd_boolean
3908 bfd_elf_s390_set_options (struct bfd_link_info *info,
3909 struct s390_elf_params *params)
3910 {
3911 struct elf_s390_link_hash_table *htab;
3912
3913 if (info)
3914 {
3915 htab = elf_s390_hash_table (info);
3916 if (htab)
3917 htab->params = params;
3918 }
3919
3920 return TRUE;
3921 }
3922
3923
3924 /* Why was the hash table entry size definition changed from
3925 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3926 this is the only reason for the s390_elf64_size_info structure. */
3927
3928 const struct elf_size_info s390_elf64_size_info =
3929 {
3930 sizeof (Elf64_External_Ehdr),
3931 sizeof (Elf64_External_Phdr),
3932 sizeof (Elf64_External_Shdr),
3933 sizeof (Elf64_External_Rel),
3934 sizeof (Elf64_External_Rela),
3935 sizeof (Elf64_External_Sym),
3936 sizeof (Elf64_External_Dyn),
3937 sizeof (Elf_External_Note),
3938 8, /* hash-table entry size. */
3939 1, /* internal relocations per external relocations. */
3940 64, /* arch_size. */
3941 3, /* log_file_align. */
3942 ELFCLASS64, EV_CURRENT,
3943 bfd_elf64_write_out_phdrs,
3944 bfd_elf64_write_shdrs_and_ehdr,
3945 bfd_elf64_checksum_contents,
3946 bfd_elf64_write_relocs,
3947 bfd_elf64_swap_symbol_in,
3948 bfd_elf64_swap_symbol_out,
3949 bfd_elf64_slurp_reloc_table,
3950 bfd_elf64_slurp_symbol_table,
3951 bfd_elf64_swap_dyn_in,
3952 bfd_elf64_swap_dyn_out,
3953 bfd_elf64_swap_reloc_in,
3954 bfd_elf64_swap_reloc_out,
3955 bfd_elf64_swap_reloca_in,
3956 bfd_elf64_swap_reloca_out
3957 };
3958
3959 #define TARGET_BIG_SYM s390_elf64_vec
3960 #define TARGET_BIG_NAME "elf64-s390"
3961 #define ELF_ARCH bfd_arch_s390
3962 #define ELF_TARGET_ID S390_ELF_DATA
3963 #define ELF_MACHINE_CODE EM_S390
3964 #define ELF_MACHINE_ALT1 EM_S390_OLD
3965 #define ELF_MAXPAGESIZE 0x1000
3966
3967 #define elf_backend_size_info s390_elf64_size_info
3968
3969 #define elf_backend_can_gc_sections 1
3970 #define elf_backend_can_refcount 1
3971 #define elf_backend_want_got_plt 1
3972 #define elf_backend_plt_readonly 1
3973 #define elf_backend_want_plt_sym 0
3974 #define elf_backend_got_header_size 24
3975 #define elf_backend_want_dynrelro 1
3976 #define elf_backend_rela_normal 1
3977
3978 #define elf_info_to_howto elf_s390_info_to_howto
3979
3980 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3981 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3982 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3983 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3984 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3985
3986 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3987 #define elf_backend_check_relocs elf_s390_check_relocs
3988 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3989 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3990 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3991 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3992 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3993 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3994 #define elf_backend_relocate_section elf_s390_relocate_section
3995 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3996 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3997 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3998 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
3999 #define elf_backend_write_core_note elf_s390_write_core_note
4000 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4001 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4002 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
4003 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
4004
4005 #define bfd_elf64_mkobject elf_s390_mkobject
4006 #define elf_backend_object_p elf_s390_object_p
4007
4008 #include "elf64-target.h"
GDB Binutils - Deliverables
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