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x86: Correct EVEX vector load/store optimization
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2019 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
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 <stdarg.h>
29
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
36
37 /* The relocation "howto" table. */
38
39 static reloc_howto_type elf_howto_table[] =
40 {
41 HOWTO (R_390_NONE, /* type */
42 0, /* rightshift */
43 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
44 0, /* bitsize */
45 FALSE, /* pc_relative */
46 0, /* bitpos */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
51 0, /* src_mask */
52 0, /* dst_mask */
53 FALSE), /* pcrel_offset */
54
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
172 };
173
174 /* GNU extension to record C++ vtable hierarchy. */
175 static reloc_howto_type elf32_s390_vtinherit_howto =
176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
177 static reloc_howto_type elf32_s390_vtentry_howto =
178 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
179
180 static reloc_howto_type *
181 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182 bfd_reloc_code_real_type code)
183 {
184 switch (code)
185 {
186 case BFD_RELOC_NONE:
187 return &elf_howto_table[(int) R_390_NONE];
188 case BFD_RELOC_8:
189 return &elf_howto_table[(int) R_390_8];
190 case BFD_RELOC_390_12:
191 return &elf_howto_table[(int) R_390_12];
192 case BFD_RELOC_16:
193 return &elf_howto_table[(int) R_390_16];
194 case BFD_RELOC_32:
195 return &elf_howto_table[(int) R_390_32];
196 case BFD_RELOC_CTOR:
197 return &elf_howto_table[(int) R_390_32];
198 case BFD_RELOC_32_PCREL:
199 return &elf_howto_table[(int) R_390_PC32];
200 case BFD_RELOC_390_GOT12:
201 return &elf_howto_table[(int) R_390_GOT12];
202 case BFD_RELOC_32_GOT_PCREL:
203 return &elf_howto_table[(int) R_390_GOT32];
204 case BFD_RELOC_390_PLT32:
205 return &elf_howto_table[(int) R_390_PLT32];
206 case BFD_RELOC_390_COPY:
207 return &elf_howto_table[(int) R_390_COPY];
208 case BFD_RELOC_390_GLOB_DAT:
209 return &elf_howto_table[(int) R_390_GLOB_DAT];
210 case BFD_RELOC_390_JMP_SLOT:
211 return &elf_howto_table[(int) R_390_JMP_SLOT];
212 case BFD_RELOC_390_RELATIVE:
213 return &elf_howto_table[(int) R_390_RELATIVE];
214 case BFD_RELOC_32_GOTOFF:
215 return &elf_howto_table[(int) R_390_GOTOFF32];
216 case BFD_RELOC_390_GOTPC:
217 return &elf_howto_table[(int) R_390_GOTPC];
218 case BFD_RELOC_390_GOT16:
219 return &elf_howto_table[(int) R_390_GOT16];
220 case BFD_RELOC_16_PCREL:
221 return &elf_howto_table[(int) R_390_PC16];
222 case BFD_RELOC_390_PC12DBL:
223 return &elf_howto_table[(int) R_390_PC12DBL];
224 case BFD_RELOC_390_PLT12DBL:
225 return &elf_howto_table[(int) R_390_PLT12DBL];
226 case BFD_RELOC_390_PC16DBL:
227 return &elf_howto_table[(int) R_390_PC16DBL];
228 case BFD_RELOC_390_PLT16DBL:
229 return &elf_howto_table[(int) R_390_PLT16DBL];
230 case BFD_RELOC_390_PC24DBL:
231 return &elf_howto_table[(int) R_390_PC24DBL];
232 case BFD_RELOC_390_PLT24DBL:
233 return &elf_howto_table[(int) R_390_PLT24DBL];
234 case BFD_RELOC_390_PC32DBL:
235 return &elf_howto_table[(int) R_390_PC32DBL];
236 case BFD_RELOC_390_PLT32DBL:
237 return &elf_howto_table[(int) R_390_PLT32DBL];
238 case BFD_RELOC_390_GOTPCDBL:
239 return &elf_howto_table[(int) R_390_GOTPCDBL];
240 case BFD_RELOC_390_GOTENT:
241 return &elf_howto_table[(int) R_390_GOTENT];
242 case BFD_RELOC_16_GOTOFF:
243 return &elf_howto_table[(int) R_390_GOTOFF16];
244 case BFD_RELOC_390_GOTPLT12:
245 return &elf_howto_table[(int) R_390_GOTPLT12];
246 case BFD_RELOC_390_GOTPLT16:
247 return &elf_howto_table[(int) R_390_GOTPLT16];
248 case BFD_RELOC_390_GOTPLT32:
249 return &elf_howto_table[(int) R_390_GOTPLT32];
250 case BFD_RELOC_390_GOTPLTENT:
251 return &elf_howto_table[(int) R_390_GOTPLTENT];
252 case BFD_RELOC_390_PLTOFF16:
253 return &elf_howto_table[(int) R_390_PLTOFF16];
254 case BFD_RELOC_390_PLTOFF32:
255 return &elf_howto_table[(int) R_390_PLTOFF32];
256 case BFD_RELOC_390_TLS_LOAD:
257 return &elf_howto_table[(int) R_390_TLS_LOAD];
258 case BFD_RELOC_390_TLS_GDCALL:
259 return &elf_howto_table[(int) R_390_TLS_GDCALL];
260 case BFD_RELOC_390_TLS_LDCALL:
261 return &elf_howto_table[(int) R_390_TLS_LDCALL];
262 case BFD_RELOC_390_TLS_GD32:
263 return &elf_howto_table[(int) R_390_TLS_GD32];
264 case BFD_RELOC_390_TLS_GOTIE12:
265 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266 case BFD_RELOC_390_TLS_GOTIE32:
267 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268 case BFD_RELOC_390_TLS_LDM32:
269 return &elf_howto_table[(int) R_390_TLS_LDM32];
270 case BFD_RELOC_390_TLS_IE32:
271 return &elf_howto_table[(int) R_390_TLS_IE32];
272 case BFD_RELOC_390_TLS_IEENT:
273 return &elf_howto_table[(int) R_390_TLS_IEENT];
274 case BFD_RELOC_390_TLS_LE32:
275 return &elf_howto_table[(int) R_390_TLS_LE32];
276 case BFD_RELOC_390_TLS_LDO32:
277 return &elf_howto_table[(int) R_390_TLS_LDO32];
278 case BFD_RELOC_390_TLS_DTPMOD:
279 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280 case BFD_RELOC_390_TLS_DTPOFF:
281 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282 case BFD_RELOC_390_TLS_TPOFF:
283 return &elf_howto_table[(int) R_390_TLS_TPOFF];
284 case BFD_RELOC_390_20:
285 return &elf_howto_table[(int) R_390_20];
286 case BFD_RELOC_390_GOT20:
287 return &elf_howto_table[(int) R_390_GOT20];
288 case BFD_RELOC_390_GOTPLT20:
289 return &elf_howto_table[(int) R_390_GOTPLT20];
290 case BFD_RELOC_390_TLS_GOTIE20:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292 case BFD_RELOC_390_IRELATIVE:
293 return &elf_howto_table[(int) R_390_IRELATIVE];
294 case BFD_RELOC_VTABLE_INHERIT:
295 return &elf32_s390_vtinherit_howto;
296 case BFD_RELOC_VTABLE_ENTRY:
297 return &elf32_s390_vtentry_howto;
298 default:
299 break;
300 }
301 return 0;
302 }
303
304 static reloc_howto_type *
305 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
306 const char *r_name)
307 {
308 unsigned int i;
309
310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311 if (elf_howto_table[i].name != NULL
312 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313 return &elf_howto_table[i];
314
315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316 return &elf32_s390_vtinherit_howto;
317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318 return &elf32_s390_vtentry_howto;
319
320 return NULL;
321 }
322
323 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
324 and elf32-s390.c has its own copy. */
325
326 static bfd_boolean
327 elf_s390_info_to_howto (bfd *abfd,
328 arelent *cache_ptr,
329 Elf_Internal_Rela *dst)
330 {
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
332
333 switch (r_type)
334 {
335 case R_390_GNU_VTINHERIT:
336 cache_ptr->howto = &elf32_s390_vtinherit_howto;
337 break;
338
339 case R_390_GNU_VTENTRY:
340 cache_ptr->howto = &elf32_s390_vtentry_howto;
341 break;
342
343 default:
344 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
345 {
346 /* xgettext:c-format */
347 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
348 abfd, r_type);
349 bfd_set_error (bfd_error_bad_value);
350 return FALSE;
351 }
352 cache_ptr->howto = &elf_howto_table[r_type];
353 }
354
355 return TRUE;
356 }
357
358 /* A relocation function which doesn't do anything. */
359 static bfd_reloc_status_type
360 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
361 arelent *reloc_entry,
362 asymbol *symbol ATTRIBUTE_UNUSED,
363 void * data ATTRIBUTE_UNUSED,
364 asection *input_section,
365 bfd *output_bfd,
366 char **error_message ATTRIBUTE_UNUSED)
367 {
368 if (output_bfd)
369 reloc_entry->address += input_section->output_offset;
370 return bfd_reloc_ok;
371 }
372
373 /* Handle the large displacement relocs. */
374 static bfd_reloc_status_type
375 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
376 arelent *reloc_entry,
377 asymbol *symbol,
378 void * data ATTRIBUTE_UNUSED,
379 asection *input_section,
380 bfd *output_bfd,
381 char **error_message ATTRIBUTE_UNUSED)
382 {
383 reloc_howto_type *howto = reloc_entry->howto;
384 bfd_vma relocation;
385 bfd_vma insn;
386
387 if (output_bfd != (bfd *) NULL
388 && (symbol->flags & BSF_SECTION_SYM) == 0
389 && (! howto->partial_inplace
390 || reloc_entry->addend == 0))
391 {
392 reloc_entry->address += input_section->output_offset;
393 return bfd_reloc_ok;
394 }
395
396 if (output_bfd != NULL)
397 return bfd_reloc_continue;
398
399 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
400 return bfd_reloc_outofrange;
401
402 relocation = (symbol->value
403 + symbol->section->output_section->vma
404 + symbol->section->output_offset);
405 relocation += reloc_entry->addend;
406 if (howto->pc_relative)
407 {
408 relocation -= (input_section->output_section->vma
409 + input_section->output_offset);
410 relocation -= reloc_entry->address;
411 }
412
413 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
414 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
415 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
416
417 if ((bfd_signed_vma) relocation < - 0x80000
418 || (bfd_signed_vma) relocation > 0x7ffff)
419 return bfd_reloc_overflow;
420 else
421 return bfd_reloc_ok;
422 }
423
424 static bfd_boolean
425 elf_s390_is_local_label_name (bfd *abfd, const char *name)
426 {
427 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
428 return TRUE;
429
430 return _bfd_elf_is_local_label_name (abfd, name);
431 }
432
433 /* Functions for the 390 ELF linker. */
434
435 /* The name of the dynamic interpreter. This is put in the .interp
436 section. */
437
438 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
439
440 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
441 copying dynamic variables from a shared lib into an app's dynbss
442 section, and instead use a dynamic relocation to point into the
443 shared lib. */
444 #define ELIMINATE_COPY_RELOCS 1
445
446 /* The size in bytes of the first entry in the procedure linkage table. */
447 #define PLT_FIRST_ENTRY_SIZE 32
448 /* The size in bytes of an entry in the procedure linkage table. */
449 #define PLT_ENTRY_SIZE 32
450
451 #define GOT_ENTRY_SIZE 4
452
453 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
454
455 /* The first three entries in a procedure linkage table are reserved,
456 and the initial contents are unimportant (we zero them out).
457 Subsequent entries look like this. See the SVR4 ABI 386
458 supplement to see how this works. */
459
460 /* For the s390, simple addr offset can only be 0 - 4096.
461 To use the full 2 GB address space, several instructions
462 are needed to load an address in a register and execute
463 a branch( or just saving the address)
464
465 Furthermore, only r 0 and 1 are free to use!!! */
466
467 /* The first 3 words in the GOT are then reserved.
468 Word 0 is the address of the dynamic table.
469 Word 1 is a pointer to a structure describing the object
470 Word 2 is used to point to the loader entry address.
471
472 The code for position independent PLT entries looks like this:
473
474 r12 holds addr of the current GOT at entry to the PLT
475
476 The GOT holds the address in the PLT to be executed.
477 The loader then gets:
478 24(15) = Pointer to the structure describing the object.
479 28(15) = Offset into rela.plt
480
481 The loader must then find the module where the function is
482 and insert the address in the GOT.
483
484 Note: 390 can only address +- 64 K relative.
485 We check if offset > 65536, then make a relative branch -64xxx
486 back to a previous defined branch
487
488 PLT1: BASR 1,0 # 2 bytes
489 L 1,22(1) # 4 bytes Load offset in GOT in r 1
490 L 1,(1,12) # 4 bytes Load address from GOT in r1
491 BCR 15,1 # 2 bytes Jump to address
492 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
493 L 1,14(1) # 4 bytes Load offset in symol table in r1
494 BRC 15,-x # 4 bytes Jump to start of PLT
495 .word 0 # 2 bytes filler
496 .long ? # 4 bytes offset in GOT
497 .long ? # 4 bytes offset into rela.plt
498
499 This was the general case. There are two additional, optimizes PLT
500 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
501 First the one for GOT offsets < 4096:
502
503 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
504 BCR 15,1 # 2 bytes Jump to address
505 .word 0,0,0 # 6 bytes filler
506 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
507 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
508 BRC 15,-x # 4 bytes Jump to start of PLT
509 .word 0,0,0 # 6 bytes filler
510 .long ? # 4 bytes offset into rela.plt
511
512 Second the one for GOT offsets < 32768:
513
514 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
515 L 1,(1,12) # 4 bytes Load address from GOT to r1
516 BCR 15,1 # 2 bytes Jump to address
517 .word 0 # 2 bytes filler
518 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
519 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
520 BRC 15,-x # 4 bytes Jump to start of PLT
521 .word 0,0,0 # 6 bytes filler
522 .long ? # 4 bytes offset into rela.plt
523
524 Total = 32 bytes per PLT entry
525
526 The code for static build PLT entries looks like this:
527
528 PLT1: BASR 1,0 # 2 bytes
529 L 1,22(1) # 4 bytes Load address of GOT entry
530 L 1,0(0,1) # 4 bytes Load address from GOT in r1
531 BCR 15,1 # 2 bytes Jump to address
532 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
533 L 1,14(1) # 4 bytes Load offset in symbol table in r1
534 BRC 15,-x # 4 bytes Jump to start of PLT
535 .word 0 # 2 bytes filler
536 .long ? # 4 bytes address of GOT entry
537 .long ? # 4 bytes offset into rela.plt */
538
539 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
540 {
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
543 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
544 0x07, 0xf1, /* br %r1 */
545 0x0d, 0x10, /* basr %r1,%r0 */
546 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
547 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
548 0x00, 0x00, /* padding */
549 0x00, 0x00, 0x00, 0x00, /* GOT offset */
550 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
551 };
552
553 /* Generic PLT pic entry. */
554 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
555 {
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
558 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
559 0x07, 0xf1, /* br %r1 */
560 0x0d, 0x10, /* basr %r1,%r0 */
561 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
562 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
563 0x00, 0x00, /* padding */
564 0x00, 0x00, 0x00, 0x00, /* GOT offset */
565 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
566 };
567
568 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
569 when generating the PLT slot with the GOT offset. */
570 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
571 {
572 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
573 0x07, 0xf1, /* br %r1 */
574 0x00, 0x00, 0x00, 0x00, /* padding */
575 0x00, 0x00,
576 0x0d, 0x10, /* basr %r1,%r0 */
577 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
578 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
579 0x00, 0x00, 0x00, 0x00,
580 0x00, 0x00, 0x00, 0x00
581 };
582
583 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
584 when generating the PLT slot with the GOT offset. */
585 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
586 {
587 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
588 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
589 0x07, 0xf1, /* br %r1 */
590 0x00, 0x00,
591 0x0d, 0x10, /* basr %r1,%r0 */
592 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
593 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
594 0x00, 0x00, 0x00, 0x00,
595 0x00, 0x00, 0x00, 0x00,
596 0x00, 0x00
597 };
598
599 /* The first PLT entry pushes the offset into the rela.plt
600 from R1 onto the stack at 8(15) and the loader object info
601 at 12(15), loads the loader address in R1 and jumps to it. */
602
603 /* The first entry in the PLT for PIC code:
604
605 PLT0:
606 ST 1,28(15) # R1 has offset into rela.plt
607 L 1,4(12) # Get loader ino(object struct address)
608 ST 1,24(15) # Store address
609 L 1,8(12) # Entry address of loader in R1
610 BR 1 # Jump to loader
611
612 The first entry in the PLT for static code:
613
614 PLT0:
615 ST 1,28(15) # R1 has offset into rela.plt
616 BASR 1,0
617 L 1,18(0,1) # Get address of GOT
618 MVC 24(4,15),4(1) # Move loader ino to stack
619 L 1,8(1) # Get address of loader
620 BR 1 # Jump to loader
621 .word 0 # filler
622 .long got # address of GOT */
623
624 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
625 {
626 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
627 0x0d, 0x10, /* basr %r1,%r0 */
628 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
629 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
630 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
631 0x07, 0xf1, /* br %r1 */
632 0x00, 0x00, 0x00, 0x00,
633 0x00, 0x00, 0x00, 0x00,
634 0x00, 0x00
635 };
636
637 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
638 {
639 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
640 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
641 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
642 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
643 0x07, 0xf1, /* br %r1 */
644 0x00, 0x00, 0x00, 0x00,
645 0x00, 0x00, 0x00, 0x00,
646 0x00, 0x00, 0x00, 0x00,
647 0x00, 0x00
648 };
649
650
651 /* s390 ELF linker hash entry. */
652
653 struct elf_s390_link_hash_entry
654 {
655 struct elf_link_hash_entry elf;
656
657 /* Track dynamic relocs copied for this symbol. */
658 struct elf_dyn_relocs *dyn_relocs;
659
660 /* Number of GOTPLT references for a function. */
661 bfd_signed_vma gotplt_refcount;
662
663 #define GOT_UNKNOWN 0
664 #define GOT_NORMAL 1
665 #define GOT_TLS_GD 2
666 #define GOT_TLS_IE 3
667 #define GOT_TLS_IE_NLT 4
668 unsigned char tls_type;
669
670 /* For pointer equality reasons we might need to change the symbol
671 type from STT_GNU_IFUNC to STT_FUNC together with its value and
672 section entry. So after alloc_dynrelocs only these values should
673 be used. In order to check whether a symbol is IFUNC use
674 s390_is_ifunc_symbol_p. */
675 bfd_vma ifunc_resolver_address;
676 asection *ifunc_resolver_section;
677 };
678
679 #define elf_s390_hash_entry(ent) \
680 ((struct elf_s390_link_hash_entry *)(ent))
681
682 /* This structure represents an entry in the local PLT list needed for
683 local IFUNC symbols. */
684 struct plt_entry
685 {
686 /* The section of the local symbol.
687 Set in relocate_section and used in finish_dynamic_sections. */
688 asection *sec;
689
690 union
691 {
692 bfd_signed_vma refcount;
693 bfd_vma offset;
694 } plt;
695 };
696
697 /* NOTE: Keep this structure in sync with
698 the one declared in elf64-s390.c. */
699 struct elf_s390_obj_tdata
700 {
701 struct elf_obj_tdata root;
702
703 /* A local PLT is needed for ifunc symbols. */
704 struct plt_entry *local_plt;
705
706 /* TLS type for each local got entry. */
707 char *local_got_tls_type;
708 };
709
710 #define elf_s390_tdata(abfd) \
711 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
712
713 #define elf_s390_local_plt(abfd) \
714 (elf_s390_tdata (abfd)->local_plt)
715
716 #define elf_s390_local_got_tls_type(abfd) \
717 (elf_s390_tdata (abfd)->local_got_tls_type)
718
719 #define is_s390_elf(bfd) \
720 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
721 && elf_tdata (bfd) != NULL \
722 && elf_object_id (bfd) == S390_ELF_DATA)
723
724 static bfd_boolean
725 elf_s390_mkobject (bfd *abfd)
726 {
727 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
728 S390_ELF_DATA);
729 }
730
731 static bfd_boolean
732 elf_s390_object_p (bfd *abfd)
733 {
734 /* Set the right machine number for an s390 elf32 file. */
735 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
736 }
737
738 /* s390 ELF linker hash table. */
739
740 struct elf_s390_link_hash_table
741 {
742 struct elf_link_hash_table elf;
743
744 /* Short-cuts to get to dynamic linker sections. */
745 asection *irelifunc;
746
747 union
748 {
749 bfd_signed_vma refcount;
750 bfd_vma offset;
751 } tls_ldm_got;
752
753 /* Small local sym cache. */
754 struct sym_cache sym_cache;
755 };
756
757 /* Get the s390 ELF linker hash table from a link_info structure. */
758
759 #define elf_s390_hash_table(p) \
760 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
761 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
762
763 #undef ELF64
764 #include "elf-s390-common.c"
765
766 /* Create an entry in an s390 ELF linker hash table. */
767
768 static struct bfd_hash_entry *
769 link_hash_newfunc (struct bfd_hash_entry *entry,
770 struct bfd_hash_table *table,
771 const char *string)
772 {
773 /* Allocate the structure if it has not already been allocated by a
774 subclass. */
775 if (entry == NULL)
776 {
777 entry = bfd_hash_allocate (table,
778 sizeof (struct elf_s390_link_hash_entry));
779 if (entry == NULL)
780 return entry;
781 }
782
783 /* Call the allocation method of the superclass. */
784 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
785 if (entry != NULL)
786 {
787 struct elf_s390_link_hash_entry *eh;
788
789 eh = (struct elf_s390_link_hash_entry *) entry;
790 eh->dyn_relocs = NULL;
791 eh->gotplt_refcount = 0;
792 eh->tls_type = GOT_UNKNOWN;
793 eh->ifunc_resolver_address = 0;
794 eh->ifunc_resolver_section = NULL;
795 }
796
797 return entry;
798 }
799
800 /* Create an s390 ELF linker hash table. */
801
802 static struct bfd_link_hash_table *
803 elf_s390_link_hash_table_create (bfd *abfd)
804 {
805 struct elf_s390_link_hash_table *ret;
806 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
807
808 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
809 if (ret == NULL)
810 return NULL;
811
812 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
813 sizeof (struct elf_s390_link_hash_entry),
814 S390_ELF_DATA))
815 {
816 free (ret);
817 return NULL;
818 }
819
820 return &ret->elf.root;
821 }
822
823 /* Copy the extra info we tack onto an elf_link_hash_entry. */
824
825 static void
826 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
827 struct elf_link_hash_entry *dir,
828 struct elf_link_hash_entry *ind)
829 {
830 struct elf_s390_link_hash_entry *edir, *eind;
831
832 edir = (struct elf_s390_link_hash_entry *) dir;
833 eind = (struct elf_s390_link_hash_entry *) ind;
834
835 if (eind->dyn_relocs != NULL)
836 {
837 if (edir->dyn_relocs != NULL)
838 {
839 struct elf_dyn_relocs **pp;
840 struct elf_dyn_relocs *p;
841
842 /* Add reloc counts against the indirect sym to the direct sym
843 list. Merge any entries against the same section. */
844 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
845 {
846 struct elf_dyn_relocs *q;
847
848 for (q = edir->dyn_relocs; q != NULL; q = q->next)
849 if (q->sec == p->sec)
850 {
851 q->pc_count += p->pc_count;
852 q->count += p->count;
853 *pp = p->next;
854 break;
855 }
856 if (q == NULL)
857 pp = &p->next;
858 }
859 *pp = edir->dyn_relocs;
860 }
861
862 edir->dyn_relocs = eind->dyn_relocs;
863 eind->dyn_relocs = NULL;
864 }
865
866 if (ind->root.type == bfd_link_hash_indirect
867 && dir->got.refcount <= 0)
868 {
869 edir->tls_type = eind->tls_type;
870 eind->tls_type = GOT_UNKNOWN;
871 }
872
873 if (ELIMINATE_COPY_RELOCS
874 && ind->root.type != bfd_link_hash_indirect
875 && dir->dynamic_adjusted)
876 {
877 /* If called to transfer flags for a weakdef during processing
878 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
879 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
880 if (dir->versioned != versioned_hidden)
881 dir->ref_dynamic |= ind->ref_dynamic;
882 dir->ref_regular |= ind->ref_regular;
883 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
884 dir->needs_plt |= ind->needs_plt;
885 }
886 else
887 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
888 }
889
890 static int
891 elf_s390_tls_transition (struct bfd_link_info *info,
892 int r_type,
893 int is_local)
894 {
895 if (bfd_link_pic (info))
896 return r_type;
897
898 switch (r_type)
899 {
900 case R_390_TLS_GD32:
901 case R_390_TLS_IE32:
902 if (is_local)
903 return R_390_TLS_LE32;
904 return R_390_TLS_IE32;
905 case R_390_TLS_GOTIE32:
906 if (is_local)
907 return R_390_TLS_LE32;
908 return R_390_TLS_GOTIE32;
909 case R_390_TLS_LDM32:
910 return R_390_TLS_LE32;
911 }
912
913 return r_type;
914 }
915
916 /* Look through the relocs for a section during the first phase, and
917 allocate space in the global offset table or procedure linkage
918 table. */
919
920 static bfd_boolean
921 elf_s390_check_relocs (bfd *abfd,
922 struct bfd_link_info *info,
923 asection *sec,
924 const Elf_Internal_Rela *relocs)
925 {
926 struct elf_s390_link_hash_table *htab;
927 Elf_Internal_Shdr *symtab_hdr;
928 struct elf_link_hash_entry **sym_hashes;
929 const Elf_Internal_Rela *rel;
930 const Elf_Internal_Rela *rel_end;
931 asection *sreloc;
932 bfd_signed_vma *local_got_refcounts;
933 int tls_type, old_tls_type;
934 Elf_Internal_Sym *isym;
935
936 if (bfd_link_relocatable (info))
937 return TRUE;
938
939 BFD_ASSERT (is_s390_elf (abfd));
940
941 htab = elf_s390_hash_table (info);
942 symtab_hdr = &elf_symtab_hdr (abfd);
943 sym_hashes = elf_sym_hashes (abfd);
944 local_got_refcounts = elf_local_got_refcounts (abfd);
945
946 sreloc = NULL;
947
948 rel_end = relocs + sec->reloc_count;
949 for (rel = relocs; rel < rel_end; rel++)
950 {
951 unsigned int r_type;
952 unsigned int r_symndx;
953 struct elf_link_hash_entry *h;
954
955 r_symndx = ELF32_R_SYM (rel->r_info);
956
957 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
958 {
959 /* xgettext:c-format */
960 _bfd_error_handler (_("%pB: bad symbol index: %d"),
961 abfd, r_symndx);
962 return FALSE;
963 }
964
965 if (r_symndx < symtab_hdr->sh_info)
966 {
967 /* A local symbol. */
968 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
969 abfd, r_symndx);
970 if (isym == NULL)
971 return FALSE;
972
973 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
974 {
975 struct plt_entry *plt;
976
977 if (htab->elf.dynobj == NULL)
978 htab->elf.dynobj = abfd;
979
980 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
981 return FALSE;
982
983 if (local_got_refcounts == NULL)
984 {
985 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
986 return FALSE;
987 local_got_refcounts = elf_local_got_refcounts (abfd);
988 }
989 plt = elf_s390_local_plt (abfd);
990 plt[r_symndx].plt.refcount++;
991 }
992 h = NULL;
993 }
994 else
995 {
996 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
997 while (h->root.type == bfd_link_hash_indirect
998 || h->root.type == bfd_link_hash_warning)
999 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1000 }
1001
1002 /* Create got section and local_got_refcounts array if they
1003 are needed. */
1004 r_type = elf_s390_tls_transition (info,
1005 ELF32_R_TYPE (rel->r_info),
1006 h == NULL);
1007 switch (r_type)
1008 {
1009 case R_390_GOT12:
1010 case R_390_GOT16:
1011 case R_390_GOT20:
1012 case R_390_GOT32:
1013 case R_390_GOTENT:
1014 case R_390_GOTPLT12:
1015 case R_390_GOTPLT16:
1016 case R_390_GOTPLT20:
1017 case R_390_GOTPLT32:
1018 case R_390_GOTPLTENT:
1019 case R_390_TLS_GD32:
1020 case R_390_TLS_GOTIE12:
1021 case R_390_TLS_GOTIE20:
1022 case R_390_TLS_GOTIE32:
1023 case R_390_TLS_IEENT:
1024 case R_390_TLS_IE32:
1025 case R_390_TLS_LDM32:
1026 if (h == NULL
1027 && local_got_refcounts == NULL)
1028 {
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1030 return FALSE;
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1032 }
1033 /* Fall through. */
1034 case R_390_GOTOFF16:
1035 case R_390_GOTOFF32:
1036 case R_390_GOTPC:
1037 case R_390_GOTPCDBL:
1038 if (htab->elf.sgot == NULL)
1039 {
1040 if (htab->elf.dynobj == NULL)
1041 htab->elf.dynobj = abfd;
1042 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1043 return FALSE;
1044 }
1045 }
1046
1047 if (h != NULL)
1048 {
1049 if (htab->elf.dynobj == NULL)
1050 htab->elf.dynobj = abfd;
1051 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1052 return FALSE;
1053
1054 /* Make sure an IFUNC symbol defined in a non-shared object
1055 always gets a PLT slot. */
1056 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1057 {
1058 /* The symbol is called by the dynamic loader in order
1059 to resolve the relocation. So it is in fact also
1060 referenced. */
1061 h->ref_regular = 1;
1062 h->needs_plt = 1;
1063 }
1064 }
1065 switch (r_type)
1066 {
1067 case R_390_GOTPC:
1068 case R_390_GOTPCDBL:
1069 /* These relocs do not need a GOT slot. They just load the
1070 GOT pointer itself or address something else relative to
1071 the GOT. Since the GOT pointer has been set up above we
1072 are done. */
1073 break;
1074 case R_390_GOTOFF16:
1075 case R_390_GOTOFF32:
1076 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1077 break;
1078 /* Fall through. */
1079
1080 case R_390_PLT12DBL:
1081 case R_390_PLT16DBL:
1082 case R_390_PLT24DBL:
1083 case R_390_PLT32DBL:
1084 case R_390_PLT32:
1085 case R_390_PLTOFF16:
1086 case R_390_PLTOFF32:
1087 /* This symbol requires a procedure linkage table entry. We
1088 actually build the entry in adjust_dynamic_symbol,
1089 because this might be a case of linking PIC code which is
1090 never referenced by a dynamic object, in which case we
1091 don't need to generate a procedure linkage table entry
1092 after all. */
1093
1094 /* If this is a local symbol, we resolve it directly without
1095 creating a procedure linkage table entry. */
1096 if (h != NULL)
1097 {
1098 h->needs_plt = 1;
1099 h->plt.refcount += 1;
1100 }
1101 break;
1102
1103 case R_390_GOTPLT12:
1104 case R_390_GOTPLT16:
1105 case R_390_GOTPLT20:
1106 case R_390_GOTPLT32:
1107 case R_390_GOTPLTENT:
1108 /* This symbol requires either a procedure linkage table entry
1109 or an entry in the local got. We actually build the entry
1110 in adjust_dynamic_symbol because whether this is really a
1111 global reference can change and with it the fact if we have
1112 to create a plt entry or a local got entry. To be able to
1113 make a once global symbol a local one we have to keep track
1114 of the number of gotplt references that exist for this
1115 symbol. */
1116 if (h != NULL)
1117 {
1118 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1119 h->needs_plt = 1;
1120 h->plt.refcount += 1;
1121 }
1122 else
1123 local_got_refcounts[r_symndx] += 1;
1124 break;
1125
1126 case R_390_TLS_LDM32:
1127 htab->tls_ldm_got.refcount += 1;
1128 break;
1129
1130 case R_390_TLS_IE32:
1131 case R_390_TLS_GOTIE12:
1132 case R_390_TLS_GOTIE20:
1133 case R_390_TLS_GOTIE32:
1134 case R_390_TLS_IEENT:
1135 if (bfd_link_pic (info))
1136 info->flags |= DF_STATIC_TLS;
1137 /* Fall through. */
1138
1139 case R_390_GOT12:
1140 case R_390_GOT16:
1141 case R_390_GOT20:
1142 case R_390_GOT32:
1143 case R_390_GOTENT:
1144 case R_390_TLS_GD32:
1145 /* This symbol requires a global offset table entry. */
1146 switch (r_type)
1147 {
1148 default:
1149 case R_390_GOT12:
1150 case R_390_GOT16:
1151 case R_390_GOT20:
1152 case R_390_GOT32:
1153 case R_390_GOTENT:
1154 tls_type = GOT_NORMAL;
1155 break;
1156 case R_390_TLS_GD32:
1157 tls_type = GOT_TLS_GD;
1158 break;
1159 case R_390_TLS_IE32:
1160 case R_390_TLS_GOTIE32:
1161 tls_type = GOT_TLS_IE;
1162 break;
1163 case R_390_TLS_GOTIE12:
1164 case R_390_TLS_GOTIE20:
1165 case R_390_TLS_IEENT:
1166 tls_type = GOT_TLS_IE_NLT;
1167 break;
1168 }
1169
1170 if (h != NULL)
1171 {
1172 h->got.refcount += 1;
1173 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1174 }
1175 else
1176 {
1177 local_got_refcounts[r_symndx] += 1;
1178 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1179 }
1180 /* If a TLS symbol is accessed using IE at least once,
1181 there is no point to use dynamic model for it. */
1182 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1183 {
1184 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1185 {
1186 _bfd_error_handler
1187 /* xgettext:c-format */
1188 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1189 abfd, h->root.root.string);
1190 return FALSE;
1191 }
1192 if (old_tls_type > tls_type)
1193 tls_type = old_tls_type;
1194 }
1195
1196 if (old_tls_type != tls_type)
1197 {
1198 if (h != NULL)
1199 elf_s390_hash_entry (h)->tls_type = tls_type;
1200 else
1201 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1202 }
1203
1204 if (r_type != R_390_TLS_IE32)
1205 break;
1206 /* Fall through. */
1207
1208 case R_390_TLS_LE32:
1209 /* For static linking and executables this reloc will be
1210 calculated at linktime otherwise a TLS_TPOFF runtime
1211 reloc will be generated. */
1212 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1213 break;
1214
1215 if (!bfd_link_pic (info))
1216 break;
1217 info->flags |= DF_STATIC_TLS;
1218 /* Fall through. */
1219
1220 case R_390_8:
1221 case R_390_16:
1222 case R_390_32:
1223 case R_390_PC16:
1224 case R_390_PC12DBL:
1225 case R_390_PC16DBL:
1226 case R_390_PC24DBL:
1227 case R_390_PC32DBL:
1228 case R_390_PC32:
1229 if (h != NULL && bfd_link_executable (info))
1230 {
1231 /* If this reloc is in a read-only section, we might
1232 need a copy reloc. We can't check reliably at this
1233 stage whether the section is read-only, as input
1234 sections have not yet been mapped to output sections.
1235 Tentatively set the flag for now, and correct in
1236 adjust_dynamic_symbol. */
1237 h->non_got_ref = 1;
1238
1239 if (!bfd_link_pic (info))
1240 {
1241 /* We may need a .plt entry if the function this reloc
1242 refers to is in a shared lib. */
1243 h->plt.refcount += 1;
1244 }
1245 }
1246
1247 /* If we are creating a shared library, and this is a reloc
1248 against a global symbol, or a non PC relative reloc
1249 against a local symbol, then we need to copy the reloc
1250 into the shared library. However, if we are linking with
1251 -Bsymbolic, we do not need to copy a reloc against a
1252 global symbol which is defined in an object we are
1253 including in the link (i.e., DEF_REGULAR is set). At
1254 this point we have not seen all the input files, so it is
1255 possible that DEF_REGULAR is not set now but will be set
1256 later (it is never cleared). In case of a weak definition,
1257 DEF_REGULAR may be cleared later by a strong definition in
1258 a shared library. We account for that possibility below by
1259 storing information in the relocs_copied field of the hash
1260 table entry. A similar situation occurs when creating
1261 shared libraries and symbol visibility changes render the
1262 symbol local.
1263
1264 If on the other hand, we are creating an executable, we
1265 may need to keep relocations for symbols satisfied by a
1266 dynamic library if we manage to avoid copy relocs for the
1267 symbol. */
1268 if ((bfd_link_pic (info)
1269 && (sec->flags & SEC_ALLOC) != 0
1270 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1272 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1273 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1274 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1275 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1276 || (h != NULL
1277 && (! SYMBOLIC_BIND (info, h)
1278 || h->root.type == bfd_link_hash_defweak
1279 || !h->def_regular))))
1280 || (ELIMINATE_COPY_RELOCS
1281 && !bfd_link_pic (info)
1282 && (sec->flags & SEC_ALLOC) != 0
1283 && h != NULL
1284 && (h->root.type == bfd_link_hash_defweak
1285 || !h->def_regular)))
1286 {
1287 struct elf_dyn_relocs *p;
1288 struct elf_dyn_relocs **head;
1289
1290 /* We must copy these reloc types into the output file.
1291 Create a reloc section in dynobj and make room for
1292 this reloc. */
1293 if (sreloc == NULL)
1294 {
1295 if (htab->elf.dynobj == NULL)
1296 htab->elf.dynobj = abfd;
1297
1298 sreloc = _bfd_elf_make_dynamic_reloc_section
1299 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1300
1301 if (sreloc == NULL)
1302 return FALSE;
1303 }
1304
1305 /* If this is a global symbol, we count the number of
1306 relocations we need for this symbol. */
1307 if (h != NULL)
1308 {
1309 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1310 }
1311 else
1312 {
1313 /* Track dynamic relocs needed for local syms too.
1314 We really need local syms available to do this
1315 easily. Oh well. */
1316 asection *s;
1317 void *vpp;
1318
1319 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1320 abfd, r_symndx);
1321 if (isym == NULL)
1322 return FALSE;
1323
1324 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1325 if (s == NULL)
1326 s = sec;
1327
1328 vpp = &elf_section_data (s)->local_dynrel;
1329 head = (struct elf_dyn_relocs **) vpp;
1330 }
1331
1332 p = *head;
1333 if (p == NULL || p->sec != sec)
1334 {
1335 bfd_size_type amt = sizeof *p;
1336
1337 p = ((struct elf_dyn_relocs *)
1338 bfd_alloc (htab->elf.dynobj, amt));
1339 if (p == NULL)
1340 return FALSE;
1341 p->next = *head;
1342 *head = p;
1343 p->sec = sec;
1344 p->count = 0;
1345 p->pc_count = 0;
1346 }
1347
1348 p->count += 1;
1349 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1353 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1354 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1355 p->pc_count += 1;
1356 }
1357 break;
1358
1359 /* This relocation describes the C++ object vtable hierarchy.
1360 Reconstruct it for later use during GC. */
1361 case R_390_GNU_VTINHERIT:
1362 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1363 return FALSE;
1364 break;
1365
1366 /* This relocation describes which C++ vtable entries are actually
1367 used. Record for later use during GC. */
1368 case R_390_GNU_VTENTRY:
1369 BFD_ASSERT (h != NULL);
1370 if (h != NULL
1371 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1372 return FALSE;
1373 break;
1374
1375 default:
1376 break;
1377 }
1378 }
1379
1380 return TRUE;
1381 }
1382
1383 /* Return the section that should be marked against GC for a given
1384 relocation. */
1385
1386 static asection *
1387 elf_s390_gc_mark_hook (asection *sec,
1388 struct bfd_link_info *info,
1389 Elf_Internal_Rela *rel,
1390 struct elf_link_hash_entry *h,
1391 Elf_Internal_Sym *sym)
1392 {
1393 if (h != NULL)
1394 switch (ELF32_R_TYPE (rel->r_info))
1395 {
1396 case R_390_GNU_VTINHERIT:
1397 case R_390_GNU_VTENTRY:
1398 return NULL;
1399 }
1400 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1401
1402 }
1403
1404 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1405 entry but we found we will not create any. Called when we find we will
1406 not have any PLT for this symbol, by for example
1407 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1408 or elf_s390_size_dynamic_sections if no dynamic sections will be
1409 created (we're only linking static objects). */
1410
1411 static void
1412 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1413 {
1414 if (h->elf.root.type == bfd_link_hash_warning)
1415 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1416
1417 if (h->gotplt_refcount <= 0)
1418 return;
1419
1420 /* We simply add the number of gotplt references to the number
1421 * of got references for this symbol. */
1422 h->elf.got.refcount += h->gotplt_refcount;
1423 h->gotplt_refcount = -1;
1424 }
1425
1426 /* Find dynamic relocs for H that apply to read-only sections. */
1427
1428 static asection *
1429 readonly_dynrelocs (struct elf_link_hash_entry *h)
1430 {
1431 struct elf_dyn_relocs *p;
1432
1433 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1434 {
1435 asection *s = p->sec->output_section;
1436
1437 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1438 return p->sec;
1439 }
1440 return NULL;
1441 }
1442
1443 /* Adjust a symbol defined by a dynamic object and referenced by a
1444 regular object. The current definition is in some section of the
1445 dynamic object, but we're not including those sections. We have to
1446 change the definition to something the rest of the link can
1447 understand. */
1448
1449 static bfd_boolean
1450 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1451 struct elf_link_hash_entry *h)
1452 {
1453 struct elf_s390_link_hash_table *htab;
1454 asection *s, *srel;
1455
1456 /* STT_GNU_IFUNC symbol must go through PLT. */
1457 if (s390_is_ifunc_symbol_p (h))
1458 {
1459 /* All local STT_GNU_IFUNC references must be treated as local
1460 calls via local PLT. */
1461 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1462 {
1463 bfd_size_type pc_count = 0, count = 0;
1464 struct elf_dyn_relocs **pp;
1465 struct elf_s390_link_hash_entry *eh;
1466 struct elf_dyn_relocs *p;
1467
1468 eh = (struct elf_s390_link_hash_entry *) h;
1469 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1470 {
1471 pc_count += p->pc_count;
1472 p->count -= p->pc_count;
1473 p->pc_count = 0;
1474 count += p->count;
1475 if (p->count == 0)
1476 *pp = p->next;
1477 else
1478 pp = &p->next;
1479 }
1480
1481 if (pc_count || count)
1482 {
1483 h->needs_plt = 1;
1484 h->non_got_ref = 1;
1485 if (h->plt.refcount <= 0)
1486 h->plt.refcount = 1;
1487 else
1488 h->plt.refcount += 1;
1489 }
1490 }
1491
1492 if (h->plt.refcount <= 0)
1493 {
1494 h->plt.offset = (bfd_vma) -1;
1495 h->needs_plt = 0;
1496 }
1497 return TRUE;
1498 }
1499
1500 /* If this is a function, put it in the procedure linkage table. We
1501 will fill in the contents of the procedure linkage table later
1502 (although we could actually do it here). */
1503 if (h->type == STT_FUNC
1504 || h->needs_plt)
1505 {
1506 if (h->plt.refcount <= 0
1507 || SYMBOL_CALLS_LOCAL (info, h)
1508 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1509 && h->root.type != bfd_link_hash_undefweak))
1510 {
1511 /* This case can occur if we saw a PLT32 reloc in an input
1512 file, but the symbol was never referred to by a dynamic
1513 object, or if all references were garbage collected. In
1514 such a case, we don't actually need to build a procedure
1515 linkage table, and we can just do a PC32 reloc instead. */
1516 h->plt.offset = (bfd_vma) -1;
1517 h->needs_plt = 0;
1518 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1519 }
1520
1521 return TRUE;
1522 }
1523 else
1524 /* It's possible that we incorrectly decided a .plt reloc was
1525 needed for an R_390_PC32 reloc to a non-function sym in
1526 check_relocs. We can't decide accurately between function and
1527 non-function syms in check-relocs; Objects loaded later in
1528 the link may change h->type. So fix it now. */
1529 h->plt.offset = (bfd_vma) -1;
1530
1531 /* If this is a weak symbol, and there is a real definition, the
1532 processor independent code will have arranged for us to see the
1533 real definition first, and we can just use the same value. */
1534 if (h->is_weakalias)
1535 {
1536 struct elf_link_hash_entry *def = weakdef (h);
1537 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1538 h->root.u.def.section = def->root.u.def.section;
1539 h->root.u.def.value = def->root.u.def.value;
1540 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1541 h->non_got_ref = def->non_got_ref;
1542 return TRUE;
1543 }
1544
1545 /* This is a reference to a symbol defined by a dynamic object which
1546 is not a function. */
1547
1548 /* If we are creating a shared library, we must presume that the
1549 only references to the symbol are via the global offset table.
1550 For such cases we need not do anything here; the relocations will
1551 be handled correctly by relocate_section. */
1552 if (bfd_link_pic (info))
1553 return TRUE;
1554
1555 /* If there are no references to this symbol that do not use the
1556 GOT, we don't need to generate a copy reloc. */
1557 if (!h->non_got_ref)
1558 return TRUE;
1559
1560 /* If -z nocopyreloc was given, we won't generate them either. */
1561 if (info->nocopyreloc)
1562 {
1563 h->non_got_ref = 0;
1564 return TRUE;
1565 }
1566
1567 /* If we don't find any dynamic relocs in read-only sections, then
1568 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1569 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1570 {
1571 h->non_got_ref = 0;
1572 return TRUE;
1573 }
1574
1575 /* We must allocate the symbol in our .dynbss section, which will
1576 become part of the .bss section of the executable. There will be
1577 an entry for this symbol in the .dynsym section. The dynamic
1578 object will contain position independent code, so all references
1579 from the dynamic object to this symbol will go through the global
1580 offset table. The dynamic linker will use the .dynsym entry to
1581 determine the address it must put in the global offset table, so
1582 both the dynamic object and the regular object will refer to the
1583 same memory location for the variable. */
1584
1585 htab = elf_s390_hash_table (info);
1586
1587 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1588 copy the initial value out of the dynamic object and into the
1589 runtime process image. */
1590 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1591 {
1592 s = htab->elf.sdynrelro;
1593 srel = htab->elf.sreldynrelro;
1594 }
1595 else
1596 {
1597 s = htab->elf.sdynbss;
1598 srel = htab->elf.srelbss;
1599 }
1600 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1601 {
1602 srel->size += sizeof (Elf32_External_Rela);
1603 h->needs_copy = 1;
1604 }
1605
1606 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1607 }
1608
1609 /* Allocate space in .plt, .got and associated reloc sections for
1610 dynamic relocs. */
1611
1612 static bfd_boolean
1613 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1614 {
1615 struct bfd_link_info *info;
1616 struct elf_s390_link_hash_table *htab;
1617 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1618 struct elf_dyn_relocs *p;
1619
1620 if (h->root.type == bfd_link_hash_indirect)
1621 return TRUE;
1622
1623 info = (struct bfd_link_info *) inf;
1624 htab = elf_s390_hash_table (info);
1625
1626 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1627 here if it is defined and referenced in a non-shared object. */
1628 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1629 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1630 else if (htab->elf.dynamic_sections_created
1631 && h->plt.refcount > 0)
1632 {
1633 /* Make sure this symbol is output as a dynamic symbol.
1634 Undefined weak syms won't yet be marked as dynamic. */
1635 if (h->dynindx == -1
1636 && !h->forced_local)
1637 {
1638 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1639 return FALSE;
1640 }
1641
1642 if (bfd_link_pic (info)
1643 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1644 {
1645 asection *s = htab->elf.splt;
1646
1647 /* If this is the first .plt entry, make room for the special
1648 first entry. */
1649 if (s->size == 0)
1650 s->size += PLT_FIRST_ENTRY_SIZE;
1651
1652 h->plt.offset = s->size;
1653
1654 /* If this symbol is not defined in a regular file, and we are
1655 not generating a shared library, then set the symbol to this
1656 location in the .plt. This is required to make function
1657 pointers compare as equal between the normal executable and
1658 the shared library. */
1659 if (! bfd_link_pic (info)
1660 && !h->def_regular)
1661 {
1662 h->root.u.def.section = s;
1663 h->root.u.def.value = h->plt.offset;
1664 }
1665
1666 /* Make room for this entry. */
1667 s->size += PLT_ENTRY_SIZE;
1668
1669 /* We also need to make an entry in the .got.plt section, which
1670 will be placed in the .got section by the linker script. */
1671 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1672
1673 /* We also need to make an entry in the .rela.plt section. */
1674 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1675 }
1676 else
1677 {
1678 h->plt.offset = (bfd_vma) -1;
1679 h->needs_plt = 0;
1680 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1681 }
1682 }
1683 else
1684 {
1685 h->plt.offset = (bfd_vma) -1;
1686 h->needs_plt = 0;
1687 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1688 }
1689
1690 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1691 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1692 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1693 we can save the dynamic TLS relocation. */
1694 if (h->got.refcount > 0
1695 && !bfd_link_pic (info)
1696 && h->dynindx == -1
1697 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1698 {
1699 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1700 /* For the GOTIE access without a literal pool entry the offset has
1701 to be stored somewhere. The immediate value in the instruction
1702 is not bit enough so the value is stored in the got. */
1703 {
1704 h->got.offset = htab->elf.sgot->size;
1705 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1706 }
1707 else
1708 h->got.offset = (bfd_vma) -1;
1709 }
1710 else if (h->got.refcount > 0)
1711 {
1712 asection *s;
1713 bfd_boolean dyn;
1714 int tls_type = elf_s390_hash_entry(h)->tls_type;
1715
1716 /* Make sure this symbol is output as a dynamic symbol.
1717 Undefined weak syms won't yet be marked as dynamic. */
1718 if (h->dynindx == -1
1719 && !h->forced_local)
1720 {
1721 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1722 return FALSE;
1723 }
1724
1725 s = htab->elf.sgot;
1726 h->got.offset = s->size;
1727 s->size += GOT_ENTRY_SIZE;
1728 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1729 if (tls_type == GOT_TLS_GD)
1730 s->size += GOT_ENTRY_SIZE;
1731 dyn = htab->elf.dynamic_sections_created;
1732 /* R_390_TLS_IE32 needs one dynamic relocation,
1733 R_390_TLS_GD32 needs one if local symbol and two if global. */
1734 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1735 || tls_type >= GOT_TLS_IE)
1736 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1737 else if (tls_type == GOT_TLS_GD)
1738 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1739 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1740 || h->root.type != bfd_link_hash_undefweak)
1741 && (bfd_link_pic (info)
1742 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1743 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1744 }
1745 else
1746 h->got.offset = (bfd_vma) -1;
1747
1748 if (eh->dyn_relocs == NULL)
1749 return TRUE;
1750
1751 /* In the shared -Bsymbolic case, discard space allocated for
1752 dynamic pc-relative relocs against symbols which turn out to be
1753 defined in regular objects. For the normal shared case, discard
1754 space for pc-relative relocs that have become local due to symbol
1755 visibility changes. */
1756
1757 if (bfd_link_pic (info))
1758 {
1759 if (SYMBOL_CALLS_LOCAL (info, h))
1760 {
1761 struct elf_dyn_relocs **pp;
1762
1763 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1764 {
1765 p->count -= p->pc_count;
1766 p->pc_count = 0;
1767 if (p->count == 0)
1768 *pp = p->next;
1769 else
1770 pp = &p->next;
1771 }
1772 }
1773
1774 /* Also discard relocs on undefined weak syms with non-default
1775 visibility. */
1776 if (eh->dyn_relocs != NULL
1777 && h->root.type == bfd_link_hash_undefweak)
1778 {
1779 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1780 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1781 eh->dyn_relocs = NULL;
1782
1783 /* Make sure undefined weak symbols are output as a dynamic
1784 symbol in PIEs. */
1785 else if (h->dynindx == -1
1786 && !h->forced_local)
1787 {
1788 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1789 return FALSE;
1790 }
1791 }
1792 }
1793 else if (ELIMINATE_COPY_RELOCS)
1794 {
1795 /* For the non-shared case, discard space for relocs against
1796 symbols which turn out to need copy relocs or are not
1797 dynamic. */
1798
1799 if (!h->non_got_ref
1800 && ((h->def_dynamic
1801 && !h->def_regular)
1802 || (htab->elf.dynamic_sections_created
1803 && (h->root.type == bfd_link_hash_undefweak
1804 || h->root.type == bfd_link_hash_undefined))))
1805 {
1806 /* Make sure this symbol is output as a dynamic symbol.
1807 Undefined weak syms won't yet be marked as dynamic. */
1808 if (h->dynindx == -1
1809 && !h->forced_local)
1810 {
1811 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1812 return FALSE;
1813 }
1814
1815 /* If that succeeded, we know we'll be keeping all the
1816 relocs. */
1817 if (h->dynindx != -1)
1818 goto keep;
1819 }
1820
1821 eh->dyn_relocs = NULL;
1822
1823 keep: ;
1824 }
1825
1826 /* Finally, allocate space. */
1827 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1828 {
1829 asection *sreloc = elf_section_data (p->sec)->sreloc;
1830
1831 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1832 }
1833
1834 return TRUE;
1835 }
1836
1837 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1838 read-only sections. */
1839
1840 static bfd_boolean
1841 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1842 {
1843 asection *sec;
1844
1845 if (h->root.type == bfd_link_hash_indirect)
1846 return TRUE;
1847
1848 sec = readonly_dynrelocs (h);
1849 if (sec != NULL)
1850 {
1851 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1852
1853 info->flags |= DF_TEXTREL;
1854 info->callbacks->minfo
1855 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1856 sec->owner, h->root.root.string, sec);
1857
1858 /* Not an error, just cut short the traversal. */
1859 return FALSE;
1860 }
1861 return TRUE;
1862 }
1863
1864 /* Set the sizes of the dynamic sections. */
1865
1866 static bfd_boolean
1867 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1868 struct bfd_link_info *info)
1869 {
1870 struct elf_s390_link_hash_table *htab;
1871 bfd *dynobj;
1872 asection *s;
1873 bfd_boolean relocs;
1874 bfd *ibfd;
1875
1876 htab = elf_s390_hash_table (info);
1877 dynobj = htab->elf.dynobj;
1878 if (dynobj == NULL)
1879 abort ();
1880
1881 if (htab->elf.dynamic_sections_created)
1882 {
1883 /* Set the contents of the .interp section to the interpreter. */
1884 if (bfd_link_executable (info) && !info->nointerp)
1885 {
1886 s = bfd_get_linker_section (dynobj, ".interp");
1887 if (s == NULL)
1888 abort ();
1889 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1890 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1891 }
1892 }
1893
1894 /* Set up .got offsets for local syms, and space for local dynamic
1895 relocs. */
1896 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1897 {
1898 bfd_signed_vma *local_got;
1899 bfd_signed_vma *end_local_got;
1900 char *local_tls_type;
1901 bfd_size_type locsymcount;
1902 Elf_Internal_Shdr *symtab_hdr;
1903 asection *srela;
1904 struct plt_entry *local_plt;
1905 unsigned int i;
1906
1907 if (! is_s390_elf (ibfd))
1908 continue;
1909
1910 for (s = ibfd->sections; s != NULL; s = s->next)
1911 {
1912 struct elf_dyn_relocs *p;
1913
1914 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1915 {
1916 if (!bfd_is_abs_section (p->sec)
1917 && bfd_is_abs_section (p->sec->output_section))
1918 {
1919 /* Input section has been discarded, either because
1920 it is a copy of a linkonce section or due to
1921 linker script /DISCARD/, so we'll be discarding
1922 the relocs too. */
1923 }
1924 else if (p->count != 0)
1925 {
1926 srela = elf_section_data (p->sec)->sreloc;
1927 srela->size += p->count * sizeof (Elf32_External_Rela);
1928 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1929 info->flags |= DF_TEXTREL;
1930 }
1931 }
1932 }
1933
1934 local_got = elf_local_got_refcounts (ibfd);
1935 if (!local_got)
1936 continue;
1937
1938 symtab_hdr = &elf_symtab_hdr (ibfd);
1939 locsymcount = symtab_hdr->sh_info;
1940 end_local_got = local_got + locsymcount;
1941 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1942 s = htab->elf.sgot;
1943 srela = htab->elf.srelgot;
1944 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1945 {
1946 if (*local_got > 0)
1947 {
1948 *local_got = s->size;
1949 s->size += GOT_ENTRY_SIZE;
1950 if (*local_tls_type == GOT_TLS_GD)
1951 s->size += GOT_ENTRY_SIZE;
1952 if (bfd_link_pic (info))
1953 srela->size += sizeof (Elf32_External_Rela);
1954 }
1955 else
1956 *local_got = (bfd_vma) -1;
1957 }
1958 local_plt = elf_s390_local_plt (ibfd);
1959 for (i = 0; i < symtab_hdr->sh_info; i++)
1960 {
1961 if (local_plt[i].plt.refcount > 0)
1962 {
1963 local_plt[i].plt.offset = htab->elf.iplt->size;
1964 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1965 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1966 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1967 }
1968 else
1969 local_plt[i].plt.offset = (bfd_vma) -1;
1970 }
1971 }
1972
1973 if (htab->tls_ldm_got.refcount > 0)
1974 {
1975 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1976 relocs. */
1977 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1978 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1979 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1980 }
1981 else
1982 htab->tls_ldm_got.offset = -1;
1983
1984 /* Allocate global sym .plt and .got entries, and space for global
1985 sym dynamic relocs. */
1986 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1987
1988 /* We now have determined the sizes of the various dynamic sections.
1989 Allocate memory for them. */
1990 relocs = FALSE;
1991 for (s = dynobj->sections; s != NULL; s = s->next)
1992 {
1993 if ((s->flags & SEC_LINKER_CREATED) == 0)
1994 continue;
1995
1996 if (s == htab->elf.splt
1997 || s == htab->elf.sgot
1998 || s == htab->elf.sgotplt
1999 || s == htab->elf.sdynbss
2000 || s == htab->elf.sdynrelro
2001 || s == htab->elf.iplt
2002 || s == htab->elf.igotplt
2003 || s == htab->irelifunc)
2004 {
2005 /* Strip this section if we don't need it; see the
2006 comment below. */
2007 }
2008 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2009 {
2010 if (s->size != 0)
2011 relocs = TRUE;
2012
2013 /* We use the reloc_count field as a counter if we need
2014 to copy relocs into the output file. */
2015 s->reloc_count = 0;
2016 }
2017 else
2018 {
2019 /* It's not one of our sections, so don't allocate space. */
2020 continue;
2021 }
2022
2023 if (s->size == 0)
2024 {
2025 /* If we don't need this section, strip it from the
2026 output file. This is to handle .rela.bss and
2027 .rela.plt. We must create it in
2028 create_dynamic_sections, because it must be created
2029 before the linker maps input sections to output
2030 sections. The linker does that before
2031 adjust_dynamic_symbol is called, and it is that
2032 function which decides whether anything needs to go
2033 into these sections. */
2034
2035 s->flags |= SEC_EXCLUDE;
2036 continue;
2037 }
2038
2039 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2040 continue;
2041
2042 /* Allocate memory for the section contents. We use bfd_zalloc
2043 here in case unused entries are not reclaimed before the
2044 section's contents are written out. This should not happen,
2045 but this way if it does, we get a R_390_NONE reloc instead
2046 of garbage. */
2047 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2048 if (s->contents == NULL)
2049 return FALSE;
2050 }
2051
2052 if (htab->elf.dynamic_sections_created)
2053 {
2054 /* Add some entries to the .dynamic section. We fill in the
2055 values later, in elf_s390_finish_dynamic_sections, but we
2056 must add the entries now so that we get the correct size for
2057 the .dynamic section. The DT_DEBUG entry is filled in by the
2058 dynamic linker and used by the debugger. */
2059 #define add_dynamic_entry(TAG, VAL) \
2060 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2061
2062 if (bfd_link_executable (info))
2063 {
2064 if (!add_dynamic_entry (DT_DEBUG, 0))
2065 return FALSE;
2066 }
2067
2068 if (htab->elf.splt->size != 0)
2069 {
2070 if (!add_dynamic_entry (DT_PLTGOT, 0)
2071 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2072 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2073 || !add_dynamic_entry (DT_JMPREL, 0))
2074 return FALSE;
2075 }
2076
2077 if (relocs)
2078 {
2079 if (!add_dynamic_entry (DT_RELA, 0)
2080 || !add_dynamic_entry (DT_RELASZ, 0)
2081 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2082 return FALSE;
2083
2084 /* If any dynamic relocs apply to a read-only section,
2085 then we need a DT_TEXTREL entry. */
2086 if ((info->flags & DF_TEXTREL) == 0)
2087 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2088
2089 if ((info->flags & DF_TEXTREL) != 0)
2090 {
2091 if (!add_dynamic_entry (DT_TEXTREL, 0))
2092 return FALSE;
2093 }
2094 }
2095 }
2096 #undef add_dynamic_entry
2097
2098 return TRUE;
2099 }
2100
2101 /* Return the base VMA address which should be subtracted from real addresses
2102 when resolving @dtpoff relocation.
2103 This is PT_TLS segment p_vaddr. */
2104
2105 static bfd_vma
2106 dtpoff_base (struct bfd_link_info *info)
2107 {
2108 /* If tls_sec is NULL, we should have signalled an error already. */
2109 if (elf_hash_table (info)->tls_sec == NULL)
2110 return 0;
2111 return elf_hash_table (info)->tls_sec->vma;
2112 }
2113
2114 /* Return the relocation value for @tpoff relocation
2115 if STT_TLS virtual address is ADDRESS. */
2116
2117 static bfd_vma
2118 tpoff (struct bfd_link_info *info, bfd_vma address)
2119 {
2120 struct elf_link_hash_table *htab = elf_hash_table (info);
2121
2122 /* If tls_sec is NULL, we should have signalled an error already. */
2123 if (htab->tls_sec == NULL)
2124 return 0;
2125 return htab->tls_size + htab->tls_sec->vma - address;
2126 }
2127
2128 /* Complain if TLS instruction relocation is against an invalid
2129 instruction. */
2130
2131 static void
2132 invalid_tls_insn (bfd *input_bfd,
2133 asection *input_section,
2134 Elf_Internal_Rela *rel)
2135 {
2136 reloc_howto_type *howto;
2137
2138 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2139 _bfd_error_handler
2140 /* xgettext:c-format */
2141 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2142 input_bfd,
2143 input_section,
2144 (uint64_t) rel->r_offset,
2145 howto->name);
2146 bfd_set_error (bfd_error_bad_value);
2147 }
2148
2149 /* Relocate a 390 ELF section. */
2150
2151 static bfd_boolean
2152 elf_s390_relocate_section (bfd *output_bfd,
2153 struct bfd_link_info *info,
2154 bfd *input_bfd,
2155 asection *input_section,
2156 bfd_byte *contents,
2157 Elf_Internal_Rela *relocs,
2158 Elf_Internal_Sym *local_syms,
2159 asection **local_sections)
2160 {
2161 struct elf_s390_link_hash_table *htab;
2162 Elf_Internal_Shdr *symtab_hdr;
2163 struct elf_link_hash_entry **sym_hashes;
2164 bfd_vma *local_got_offsets;
2165 Elf_Internal_Rela *rel;
2166 Elf_Internal_Rela *relend;
2167
2168 if (!is_s390_elf (input_bfd))
2169 {
2170 bfd_set_error (bfd_error_wrong_format);
2171 return FALSE;
2172 }
2173
2174 htab = elf_s390_hash_table (info);
2175 symtab_hdr = &elf_symtab_hdr (input_bfd);
2176 sym_hashes = elf_sym_hashes (input_bfd);
2177 local_got_offsets = elf_local_got_offsets (input_bfd);
2178
2179 rel = relocs;
2180 relend = relocs + input_section->reloc_count;
2181 for (; rel < relend; rel++)
2182 {
2183 unsigned int r_type;
2184 reloc_howto_type *howto;
2185 unsigned long r_symndx;
2186 struct elf_link_hash_entry *h;
2187 Elf_Internal_Sym *sym;
2188 asection *sec;
2189 bfd_vma off;
2190 bfd_vma relocation;
2191 bfd_boolean unresolved_reloc;
2192 bfd_reloc_status_type r;
2193 int tls_type;
2194 asection *base_got = htab->elf.sgot;
2195 bfd_boolean resolved_to_zero;
2196
2197 r_type = ELF32_R_TYPE (rel->r_info);
2198 if (r_type == (int) R_390_GNU_VTINHERIT
2199 || r_type == (int) R_390_GNU_VTENTRY)
2200 continue;
2201 if (r_type >= (int) R_390_max)
2202 {
2203 bfd_set_error (bfd_error_bad_value);
2204 return FALSE;
2205 }
2206
2207 howto = elf_howto_table + r_type;
2208 r_symndx = ELF32_R_SYM (rel->r_info);
2209
2210 h = NULL;
2211 sym = NULL;
2212 sec = NULL;
2213 unresolved_reloc = FALSE;
2214 if (r_symndx < symtab_hdr->sh_info)
2215 {
2216 sym = local_syms + r_symndx;
2217 sec = local_sections[r_symndx];
2218 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2219 {
2220 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2221 if (local_plt == NULL)
2222 return FALSE;
2223
2224 /* Address of the PLT slot. */
2225 relocation = (htab->elf.iplt->output_section->vma
2226 + htab->elf.iplt->output_offset
2227 + local_plt[r_symndx].plt.offset);
2228
2229 switch (r_type)
2230 {
2231 case R_390_PLTOFF16:
2232 case R_390_PLTOFF32:
2233 relocation -= htab->elf.sgot->output_section->vma;
2234 break;
2235 case R_390_GOTPLT12:
2236 case R_390_GOTPLT16:
2237 case R_390_GOTPLT20:
2238 case R_390_GOTPLT32:
2239 case R_390_GOTPLTENT:
2240 case R_390_GOT12:
2241 case R_390_GOT16:
2242 case R_390_GOT20:
2243 case R_390_GOT32:
2244 case R_390_GOTENT:
2245 {
2246 /* Write the PLT slot address into the GOT slot. */
2247 bfd_put_32 (output_bfd, relocation,
2248 htab->elf.sgot->contents +
2249 local_got_offsets[r_symndx]);
2250 relocation = (local_got_offsets[r_symndx] +
2251 htab->elf.sgot->output_offset);
2252
2253 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2254 relocation += htab->elf.sgot->output_section->vma;
2255 break;
2256 }
2257 default:
2258 break;
2259 }
2260 /* The output section is needed later in
2261 finish_dynamic_section when creating the dynamic
2262 relocation. */
2263 local_plt[r_symndx].sec = sec;
2264 goto do_relocation;
2265 }
2266 else
2267 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2268 }
2269 else
2270 {
2271 bfd_boolean warned ATTRIBUTE_UNUSED;
2272 bfd_boolean ignored ATTRIBUTE_UNUSED;
2273
2274 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2275 r_symndx, symtab_hdr, sym_hashes,
2276 h, sec, relocation,
2277 unresolved_reloc, warned, ignored);
2278 }
2279
2280 if (sec != NULL && discarded_section (sec))
2281 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2282 rel, 1, relend, howto, 0, contents);
2283
2284 if (bfd_link_relocatable (info))
2285 continue;
2286
2287 resolved_to_zero = (h != NULL
2288 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2289
2290 switch (r_type)
2291 {
2292 case R_390_GOTPLT12:
2293 case R_390_GOTPLT16:
2294 case R_390_GOTPLT20:
2295 case R_390_GOTPLT32:
2296 case R_390_GOTPLTENT:
2297 /* There are three cases for a GOTPLT relocation. 1) The
2298 relocation is against the jump slot entry of a plt that
2299 will get emitted to the output file. 2) The relocation
2300 is against the jump slot of a plt entry that has been
2301 removed. elf_s390_adjust_gotplt has created a GOT entry
2302 as replacement. 3) The relocation is against a local symbol.
2303 Cases 2) and 3) are the same as the GOT relocation code
2304 so we just have to test for case 1 and fall through for
2305 the other two. */
2306 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2307 {
2308 bfd_vma plt_index;
2309
2310 if (s390_is_ifunc_symbol_p (h))
2311 {
2312 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2313 relocation = (plt_index * GOT_ENTRY_SIZE +
2314 htab->elf.igotplt->output_offset);
2315 if (r_type == R_390_GOTPLTENT)
2316 relocation += htab->elf.igotplt->output_section->vma;
2317 }
2318 else
2319 {
2320 /* Calc. index no.
2321 Current offset - size first entry / entry size. */
2322 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2323 PLT_ENTRY_SIZE;
2324
2325 /* Offset in GOT is PLT index plus GOT headers(3)
2326 times 4, addr & GOT addr. */
2327 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2328 if (r_type == R_390_GOTPLTENT)
2329 relocation += htab->elf.sgot->output_section->vma;
2330 }
2331 unresolved_reloc = FALSE;
2332
2333 }
2334 /* Fall through. */
2335
2336 case R_390_GOT12:
2337 case R_390_GOT16:
2338 case R_390_GOT20:
2339 case R_390_GOT32:
2340 case R_390_GOTENT:
2341 /* Relocation is to the entry for this symbol in the global
2342 offset table. */
2343 if (base_got == NULL)
2344 abort ();
2345
2346 if (h != NULL)
2347 {
2348 bfd_boolean dyn;
2349
2350 off = h->got.offset;
2351 dyn = htab->elf.dynamic_sections_created;
2352
2353 if (s390_is_ifunc_symbol_p (h))
2354 {
2355 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2356 if (off == (bfd_vma)-1)
2357 {
2358 /* No explicit GOT usage so redirect to the
2359 got.iplt slot. */
2360 base_got = htab->elf.igotplt;
2361 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2362 }
2363 else
2364 {
2365 /* Explicit GOT slots must contain the address
2366 of the PLT slot. This will be handled in
2367 finish_dynamic_symbol. */
2368 }
2369 }
2370 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2371 bfd_link_pic (info),
2372 h)
2373 || (bfd_link_pic (info)
2374 && SYMBOL_REFERENCES_LOCAL (info, h))
2375 || (ELF_ST_VISIBILITY (h->other)
2376 && h->root.type == bfd_link_hash_undefweak))
2377
2378 {
2379 /* This is actually a static link, or it is a
2380 -Bsymbolic link and the symbol is defined
2381 locally, or the symbol was forced to be local
2382 because of a version file. We must initialize
2383 this entry in the global offset table. Since the
2384 offset must always be a multiple of 2, we use the
2385 least significant bit to record whether we have
2386 initialized it already.
2387
2388 When doing a dynamic link, we create a .rel.got
2389 relocation entry to initialize the value. This
2390 is done in the finish_dynamic_symbol routine. */
2391 if ((off & 1) != 0)
2392 off &= ~1;
2393 else
2394 {
2395 bfd_put_32 (output_bfd, relocation,
2396 base_got->contents + off);
2397 h->got.offset |= 1;
2398 }
2399
2400 if ((h->def_regular
2401 && bfd_link_pic (info)
2402 && SYMBOL_REFERENCES_LOCAL (info, h))
2403 /* lrl rx,sym@GOTENT -> larl rx, sym */
2404 && ((r_type == R_390_GOTENT
2405 && (bfd_get_16 (input_bfd,
2406 contents + rel->r_offset - 2)
2407 & 0xff0f) == 0xc40d)
2408 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2409 || (r_type == R_390_GOT20
2410 && (bfd_get_32 (input_bfd,
2411 contents + rel->r_offset - 2)
2412 & 0xff00f000) == 0xe300c000
2413 && bfd_get_8 (input_bfd,
2414 contents + rel->r_offset + 3) == 0x58)))
2415 {
2416 unsigned short new_insn =
2417 (0xc000 | (bfd_get_8 (input_bfd,
2418 contents + rel->r_offset - 1) & 0xf0));
2419 bfd_put_16 (output_bfd, new_insn,
2420 contents + rel->r_offset - 2);
2421 r_type = R_390_PC32DBL;
2422 rel->r_addend = 2;
2423 howto = elf_howto_table + r_type;
2424 relocation = h->root.u.def.value
2425 + h->root.u.def.section->output_section->vma
2426 + h->root.u.def.section->output_offset;
2427 goto do_relocation;
2428 }
2429 }
2430 else
2431 unresolved_reloc = FALSE;
2432 }
2433 else
2434 {
2435 if (local_got_offsets == NULL)
2436 abort ();
2437
2438 off = local_got_offsets[r_symndx];
2439
2440 /* The offset must always be a multiple of 4. We use
2441 the least significant bit to record whether we have
2442 already generated the necessary reloc. */
2443 if ((off & 1) != 0)
2444 off &= ~1;
2445 else
2446 {
2447 bfd_put_32 (output_bfd, relocation,
2448 htab->elf.sgot->contents + off);
2449
2450 if (bfd_link_pic (info))
2451 {
2452 asection *srelgot;
2453 Elf_Internal_Rela outrel;
2454 bfd_byte *loc;
2455
2456 srelgot = htab->elf.srelgot;
2457 if (srelgot == NULL)
2458 abort ();
2459
2460 outrel.r_offset = (htab->elf.sgot->output_section->vma
2461 + htab->elf.sgot->output_offset
2462 + off);
2463 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2464 outrel.r_addend = relocation;
2465 loc = srelgot->contents;
2466 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2467 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2468 }
2469
2470 local_got_offsets[r_symndx] |= 1;
2471 }
2472 }
2473
2474 if (off >= (bfd_vma) -2)
2475 abort ();
2476
2477 relocation = base_got->output_offset + off;
2478
2479 /* For @GOTENT the relocation is against the offset between
2480 the instruction and the symbols entry in the GOT and not
2481 between the start of the GOT and the symbols entry. We
2482 add the vma of the GOT to get the correct value. */
2483 if ( r_type == R_390_GOTENT
2484 || r_type == R_390_GOTPLTENT)
2485 relocation += base_got->output_section->vma;
2486
2487 break;
2488
2489 case R_390_GOTOFF16:
2490 case R_390_GOTOFF32:
2491 /* Relocation is relative to the start of the global offset
2492 table. */
2493
2494 if (h != NULL
2495 && s390_is_ifunc_symbol_p (h)
2496 && h->def_regular
2497 && !bfd_link_executable (info))
2498 {
2499 relocation = (htab->elf.iplt->output_section->vma
2500 + htab->elf.iplt->output_offset
2501 + h->plt.offset
2502 - htab->elf.sgot->output_section->vma);
2503 goto do_relocation;
2504 }
2505
2506 /* Note that sgot->output_offset is not involved in this
2507 calculation. We always want the start of .got. If we
2508 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2509 permitted by the ABI, we might have to change this
2510 calculation. */
2511 relocation -= htab->elf.sgot->output_section->vma;
2512 break;
2513
2514 case R_390_GOTPC:
2515 case R_390_GOTPCDBL:
2516 /* Use global offset table as symbol value. */
2517 relocation = htab->elf.sgot->output_section->vma;
2518 unresolved_reloc = FALSE;
2519 break;
2520
2521 case R_390_PLT12DBL:
2522 case R_390_PLT16DBL:
2523 case R_390_PLT24DBL:
2524 case R_390_PLT32DBL:
2525 case R_390_PLT32:
2526 /* Relocation is to the entry for this symbol in the
2527 procedure linkage table. */
2528
2529 /* Resolve a PLT32 reloc against a local symbol directly,
2530 without using the procedure linkage table. */
2531 if (h == NULL)
2532 break;
2533
2534 if (h->plt.offset == (bfd_vma) -1
2535 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2536 {
2537 /* We didn't make a PLT entry for this symbol. This
2538 happens when statically linking PIC code, or when
2539 using -Bsymbolic. */
2540 break;
2541 }
2542
2543 if (s390_is_ifunc_symbol_p (h))
2544 relocation = (htab->elf.iplt->output_section->vma
2545 + htab->elf.iplt->output_offset
2546 + h->plt.offset);
2547 else
2548 relocation = (htab->elf.splt->output_section->vma
2549 + htab->elf.splt->output_offset
2550 + h->plt.offset);
2551 unresolved_reloc = FALSE;
2552 break;
2553
2554 case R_390_PLTOFF16:
2555 case R_390_PLTOFF32:
2556 /* Relocation is to the entry for this symbol in the
2557 procedure linkage table relative to the start of the GOT. */
2558
2559 /* For local symbols or if we didn't make a PLT entry for
2560 this symbol resolve the symbol directly. */
2561 if (h == NULL
2562 || h->plt.offset == (bfd_vma) -1
2563 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2564 {
2565 relocation -= htab->elf.sgot->output_section->vma;
2566 break;
2567 }
2568
2569 if (s390_is_ifunc_symbol_p (h))
2570 relocation = (htab->elf.iplt->output_section->vma
2571 + htab->elf.iplt->output_offset
2572 + h->plt.offset
2573 - htab->elf.sgot->output_section->vma);
2574 else
2575 relocation = (htab->elf.splt->output_section->vma
2576 + htab->elf.splt->output_offset
2577 + h->plt.offset
2578 - htab->elf.sgot->output_section->vma);
2579 unresolved_reloc = FALSE;
2580 break;
2581
2582 case R_390_PC16:
2583 case R_390_PC12DBL:
2584 case R_390_PC16DBL:
2585 case R_390_PC24DBL:
2586 case R_390_PC32DBL:
2587 case R_390_PC32:
2588 if (h != NULL
2589 && s390_is_ifunc_symbol_p (h)
2590 && h->def_regular
2591 && !bfd_link_executable (info))
2592 {
2593 /* This will not work our if the function does not
2594 happen to set up the GOT pointer for some other
2595 reason. 31 bit PLT entries require r12 to hold the
2596 GOT pointer.
2597 FIXME: Implement an errorcheck.
2598 NOTE: It will work when brasl is not available
2599 (e.g. with -m31 -march=g5) since a local function
2600 call then does use GOTOFF which implies r12 being set
2601 up. */
2602 relocation = (htab->elf.iplt->output_section->vma
2603 + htab->elf.iplt->output_offset
2604 + h ->plt.offset);
2605 goto do_relocation;
2606 }
2607 /* Fall through. */
2608
2609 case R_390_8:
2610 case R_390_16:
2611 case R_390_32:
2612 if ((input_section->flags & SEC_ALLOC) == 0)
2613 break;
2614
2615 if (h != NULL
2616 && s390_is_ifunc_symbol_p (h)
2617 && h->def_regular)
2618 {
2619 if (!bfd_link_pic (info))
2620 {
2621 /* For a non-shared object STT_GNU_IFUNC symbol must
2622 go through PLT. */
2623 relocation = (htab->elf.iplt->output_section->vma
2624 + htab->elf.iplt->output_offset
2625 + h ->plt.offset);
2626 goto do_relocation;
2627 }
2628 else
2629 {
2630 /* For shared objects a runtime relocation is needed. */
2631
2632 Elf_Internal_Rela outrel;
2633 asection *sreloc;
2634
2635 /* Need a dynamic relocation to get the real function
2636 address. */
2637 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2638 info,
2639 input_section,
2640 rel->r_offset);
2641 if (outrel.r_offset == (bfd_vma) -1
2642 || outrel.r_offset == (bfd_vma) -2)
2643 abort ();
2644
2645 outrel.r_offset += (input_section->output_section->vma
2646 + input_section->output_offset);
2647
2648 if (h->dynindx == -1
2649 || h->forced_local
2650 || bfd_link_executable (info))
2651 {
2652 /* This symbol is resolved locally. */
2653 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2654 outrel.r_addend = (h->root.u.def.value
2655 + h->root.u.def.section->output_section->vma
2656 + h->root.u.def.section->output_offset);
2657 }
2658 else
2659 {
2660 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2661 outrel.r_addend = 0;
2662 }
2663
2664 sreloc = htab->elf.irelifunc;
2665 elf_append_rela (output_bfd, sreloc, &outrel);
2666
2667 /* If this reloc is against an external symbol, we
2668 do not want to fiddle with the addend. Otherwise,
2669 we need to include the symbol value so that it
2670 becomes an addend for the dynamic reloc. For an
2671 internal symbol, we have updated addend. */
2672 continue;
2673 }
2674 }
2675
2676 if ((bfd_link_pic (info)
2677 && (h == NULL
2678 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2679 && !resolved_to_zero)
2680 || h->root.type != bfd_link_hash_undefweak)
2681 && ((r_type != R_390_PC16
2682 && r_type != R_390_PC12DBL
2683 && r_type != R_390_PC16DBL
2684 && r_type != R_390_PC24DBL
2685 && r_type != R_390_PC32DBL
2686 && r_type != R_390_PC32)
2687 || !SYMBOL_CALLS_LOCAL (info, h)))
2688 || (ELIMINATE_COPY_RELOCS
2689 && !bfd_link_pic (info)
2690 && h != NULL
2691 && h->dynindx != -1
2692 && !h->non_got_ref
2693 && ((h->def_dynamic
2694 && !h->def_regular)
2695 || h->root.type == bfd_link_hash_undefweak
2696 || h->root.type == bfd_link_hash_undefined)))
2697 {
2698 Elf_Internal_Rela outrel;
2699 bfd_boolean skip, relocate;
2700 asection *sreloc;
2701 bfd_byte *loc;
2702
2703 /* When generating a shared object, these relocations
2704 are copied into the output file to be resolved at run
2705 time. */
2706
2707 skip = FALSE;
2708 relocate = FALSE;
2709
2710 outrel.r_offset =
2711 _bfd_elf_section_offset (output_bfd, info, input_section,
2712 rel->r_offset);
2713 if (outrel.r_offset == (bfd_vma) -1)
2714 skip = TRUE;
2715 else if (outrel.r_offset == (bfd_vma) -2)
2716 skip = TRUE, relocate = TRUE;
2717 outrel.r_offset += (input_section->output_section->vma
2718 + input_section->output_offset);
2719
2720 if (skip)
2721 memset (&outrel, 0, sizeof outrel);
2722 else if (h != NULL
2723 && h->dynindx != -1
2724 && (r_type == R_390_PC16
2725 || r_type == R_390_PC12DBL
2726 || r_type == R_390_PC16DBL
2727 || r_type == R_390_PC24DBL
2728 || r_type == R_390_PC32DBL
2729 || r_type == R_390_PC32
2730 || !bfd_link_pic (info)
2731 || !SYMBOLIC_BIND (info, h)
2732 || !h->def_regular))
2733 {
2734 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2735 outrel.r_addend = rel->r_addend;
2736 }
2737 else
2738 {
2739 /* This symbol is local, or marked to become local. */
2740 outrel.r_addend = relocation + rel->r_addend;
2741 if (r_type == R_390_32)
2742 {
2743 relocate = TRUE;
2744 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2745 }
2746 else
2747 {
2748 long sindx;
2749
2750 if (bfd_is_abs_section (sec))
2751 sindx = 0;
2752 else if (sec == NULL || sec->owner == NULL)
2753 {
2754 bfd_set_error(bfd_error_bad_value);
2755 return FALSE;
2756 }
2757 else
2758 {
2759 asection *osec;
2760
2761 osec = sec->output_section;
2762 sindx = elf_section_data (osec)->dynindx;
2763 if (sindx == 0)
2764 {
2765 osec = htab->elf.text_index_section;
2766 sindx = elf_section_data (osec)->dynindx;
2767 }
2768 BFD_ASSERT (sindx != 0);
2769
2770 /* We are turning this relocation into one
2771 against a section symbol, so subtract out
2772 the output section's address but not the
2773 offset of the input section in the output
2774 section. */
2775 outrel.r_addend -= osec->vma;
2776 }
2777 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2778 }
2779 }
2780
2781 sreloc = elf_section_data (input_section)->sreloc;
2782 if (sreloc == NULL)
2783 abort ();
2784
2785 loc = sreloc->contents;
2786 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2787 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2788
2789 /* If this reloc is against an external symbol, we do
2790 not want to fiddle with the addend. Otherwise, we
2791 need to include the symbol value so that it becomes
2792 an addend for the dynamic reloc. */
2793 if (! relocate)
2794 continue;
2795 }
2796 break;
2797
2798 /* Relocations for tls literal pool entries. */
2799 case R_390_TLS_IE32:
2800 if (bfd_link_pic (info))
2801 {
2802 Elf_Internal_Rela outrel;
2803 asection *sreloc;
2804 bfd_byte *loc;
2805
2806 outrel.r_offset = rel->r_offset
2807 + input_section->output_section->vma
2808 + input_section->output_offset;
2809 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2810 sreloc = elf_section_data (input_section)->sreloc;
2811 if (sreloc == NULL)
2812 abort ();
2813 loc = sreloc->contents;
2814 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2815 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2816 }
2817 /* Fall through. */
2818
2819 case R_390_TLS_GD32:
2820 case R_390_TLS_GOTIE32:
2821 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2822 tls_type = GOT_UNKNOWN;
2823 if (h == NULL && local_got_offsets)
2824 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2825 else if (h != NULL)
2826 {
2827 tls_type = elf_s390_hash_entry(h)->tls_type;
2828 if (!bfd_link_pic (info)
2829 && h->dynindx == -1
2830 && tls_type >= GOT_TLS_IE)
2831 r_type = R_390_TLS_LE32;
2832 }
2833 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2834 r_type = R_390_TLS_IE32;
2835
2836 if (r_type == R_390_TLS_LE32)
2837 {
2838 /* This relocation gets optimized away by the local exec
2839 access optimization. */
2840 BFD_ASSERT (! unresolved_reloc);
2841 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2842 contents + rel->r_offset);
2843 continue;
2844 }
2845
2846 if (htab->elf.sgot == NULL)
2847 abort ();
2848
2849 if (h != NULL)
2850 off = h->got.offset;
2851 else
2852 {
2853 if (local_got_offsets == NULL)
2854 abort ();
2855
2856 off = local_got_offsets[r_symndx];
2857 }
2858
2859 emit_tls_relocs:
2860
2861 if ((off & 1) != 0)
2862 off &= ~1;
2863 else
2864 {
2865 Elf_Internal_Rela outrel;
2866 bfd_byte *loc;
2867 int dr_type, indx;
2868
2869 if (htab->elf.srelgot == NULL)
2870 abort ();
2871
2872 outrel.r_offset = (htab->elf.sgot->output_section->vma
2873 + htab->elf.sgot->output_offset + off);
2874
2875 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2876 if (r_type == R_390_TLS_GD32)
2877 dr_type = R_390_TLS_DTPMOD;
2878 else
2879 dr_type = R_390_TLS_TPOFF;
2880 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2881 outrel.r_addend = relocation - dtpoff_base (info);
2882 else
2883 outrel.r_addend = 0;
2884 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2885 loc = htab->elf.srelgot->contents;
2886 loc += htab->elf.srelgot->reloc_count++
2887 * sizeof (Elf32_External_Rela);
2888 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2889
2890 if (r_type == R_390_TLS_GD32)
2891 {
2892 if (indx == 0)
2893 {
2894 BFD_ASSERT (! unresolved_reloc);
2895 bfd_put_32 (output_bfd,
2896 relocation - dtpoff_base (info),
2897 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2898 }
2899 else
2900 {
2901 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2902 outrel.r_offset += GOT_ENTRY_SIZE;
2903 outrel.r_addend = 0;
2904 htab->elf.srelgot->reloc_count++;
2905 loc += sizeof (Elf32_External_Rela);
2906 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2907 }
2908 }
2909
2910 if (h != NULL)
2911 h->got.offset |= 1;
2912 else
2913 local_got_offsets[r_symndx] |= 1;
2914 }
2915
2916 if (off >= (bfd_vma) -2)
2917 abort ();
2918 if (r_type == ELF32_R_TYPE (rel->r_info))
2919 {
2920 relocation = htab->elf.sgot->output_offset + off;
2921 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2922 relocation += htab->elf.sgot->output_section->vma;
2923 unresolved_reloc = FALSE;
2924 }
2925 else
2926 {
2927 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2928 contents + rel->r_offset);
2929 continue;
2930 }
2931 break;
2932
2933 case R_390_TLS_GOTIE12:
2934 case R_390_TLS_GOTIE20:
2935 case R_390_TLS_IEENT:
2936 if (h == NULL)
2937 {
2938 if (local_got_offsets == NULL)
2939 abort();
2940 off = local_got_offsets[r_symndx];
2941 if (bfd_link_pic (info))
2942 goto emit_tls_relocs;
2943 }
2944 else
2945 {
2946 off = h->got.offset;
2947 tls_type = elf_s390_hash_entry(h)->tls_type;
2948 if (bfd_link_pic (info)
2949 || h->dynindx != -1
2950 || tls_type < GOT_TLS_IE)
2951 goto emit_tls_relocs;
2952 }
2953
2954 if (htab->elf.sgot == NULL)
2955 abort ();
2956
2957 BFD_ASSERT (! unresolved_reloc);
2958 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2959 htab->elf.sgot->contents + off);
2960 relocation = htab->elf.sgot->output_offset + off;
2961 if (r_type == R_390_TLS_IEENT)
2962 relocation += htab->elf.sgot->output_section->vma;
2963 unresolved_reloc = FALSE;
2964 break;
2965
2966 case R_390_TLS_LDM32:
2967 if (! bfd_link_pic (info))
2968 /* The literal pool entry this relocation refers to gets ignored
2969 by the optimized code of the local exec model. Do nothing
2970 and the value will turn out zero. */
2971 continue;
2972
2973 if (htab->elf.sgot == NULL)
2974 abort ();
2975
2976 off = htab->tls_ldm_got.offset;
2977 if (off & 1)
2978 off &= ~1;
2979 else
2980 {
2981 Elf_Internal_Rela outrel;
2982 bfd_byte *loc;
2983
2984 if (htab->elf.srelgot == NULL)
2985 abort ();
2986
2987 outrel.r_offset = (htab->elf.sgot->output_section->vma
2988 + htab->elf.sgot->output_offset + off);
2989
2990 bfd_put_32 (output_bfd, 0,
2991 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2992 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2993 outrel.r_addend = 0;
2994 loc = htab->elf.srelgot->contents;
2995 loc += htab->elf.srelgot->reloc_count++
2996 * sizeof (Elf32_External_Rela);
2997 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2998 htab->tls_ldm_got.offset |= 1;
2999 }
3000 relocation = htab->elf.sgot->output_offset + off;
3001 unresolved_reloc = FALSE;
3002 break;
3003
3004 case R_390_TLS_LE32:
3005 if (bfd_link_dll (info))
3006 {
3007 /* Linking a shared library with non-fpic code requires
3008 a R_390_TLS_TPOFF relocation. */
3009 Elf_Internal_Rela outrel;
3010 asection *sreloc;
3011 bfd_byte *loc;
3012 int indx;
3013
3014 outrel.r_offset = rel->r_offset
3015 + input_section->output_section->vma
3016 + input_section->output_offset;
3017 if (h != NULL && h->dynindx != -1)
3018 indx = h->dynindx;
3019 else
3020 indx = 0;
3021 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3022 if (indx == 0)
3023 outrel.r_addend = relocation - dtpoff_base (info);
3024 else
3025 outrel.r_addend = 0;
3026 sreloc = elf_section_data (input_section)->sreloc;
3027 if (sreloc == NULL)
3028 abort ();
3029 loc = sreloc->contents;
3030 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3031 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3032 }
3033 else
3034 {
3035 BFD_ASSERT (! unresolved_reloc);
3036 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3037 contents + rel->r_offset);
3038 }
3039 continue;
3040
3041 case R_390_TLS_LDO32:
3042 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3043 relocation -= dtpoff_base (info);
3044 else
3045 /* When converting LDO to LE, we must negate. */
3046 relocation = -tpoff (info, relocation);
3047 break;
3048
3049 /* Relocations for tls instructions. */
3050 case R_390_TLS_LOAD:
3051 case R_390_TLS_GDCALL:
3052 case R_390_TLS_LDCALL:
3053 tls_type = GOT_UNKNOWN;
3054 if (h == NULL && local_got_offsets)
3055 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3056 else if (h != NULL)
3057 tls_type = elf_s390_hash_entry(h)->tls_type;
3058
3059 if (tls_type == GOT_TLS_GD)
3060 continue;
3061
3062 if (r_type == R_390_TLS_LOAD)
3063 {
3064 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3065 {
3066 /* IE->LE transition. Four valid cases:
3067 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3068 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3069 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3070 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3071 unsigned int insn, ry;
3072
3073 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3074 if ((insn & 0xff00f000) == 0x58000000)
3075 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3076 ry = (insn & 0x000f0000);
3077 else if ((insn & 0xff0f0000) == 0x58000000)
3078 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3079 ry = (insn & 0x0000f000) << 4;
3080 else if ((insn & 0xff00f000) == 0x5800c000)
3081 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3082 ry = (insn & 0x000f0000);
3083 else if ((insn & 0xff0f0000) == 0x580c0000)
3084 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3085 ry = (insn & 0x0000f000) << 4;
3086 else
3087 {
3088 invalid_tls_insn (input_bfd, input_section, rel);
3089 return FALSE;
3090 }
3091 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3092 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3093 }
3094 }
3095 else if (r_type == R_390_TLS_GDCALL)
3096 {
3097 unsigned int insn;
3098
3099 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3100 if ((insn & 0xff000fff) != 0x4d000000 &&
3101 (insn & 0xffff0000) != 0xc0e50000 &&
3102 (insn & 0xff000000) != 0x0d000000)
3103 {
3104 invalid_tls_insn (input_bfd, input_section, rel);
3105 return FALSE;
3106 }
3107 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3108 {
3109 if ((insn & 0xff000000) == 0x0d000000)
3110 {
3111 /* GD->LE transition.
3112 basr rx, ry -> nopr r7 */
3113 insn = 0x07070000 | (insn & 0xffff);
3114 }
3115 else if ((insn & 0xff000000) == 0x4d000000)
3116 {
3117 /* GD->LE transition.
3118 bas %r14,0(%rx,%r13) -> bc 0,0 */
3119 insn = 0x47000000;
3120 }
3121 else
3122 {
3123 /* GD->LE transition.
3124 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3125 insn = 0xc0040000;
3126 bfd_put_16 (output_bfd, 0x0000,
3127 contents + rel->r_offset + 4);
3128 }
3129 }
3130 else
3131 {
3132 /* If basr is used in the pic case to invoke
3133 _tls_get_offset, something went wrong before. */
3134 if ((insn & 0xff000000) == 0x0d000000)
3135 {
3136 invalid_tls_insn (input_bfd, input_section, rel);
3137 return FALSE;
3138 }
3139
3140 if ((insn & 0xff000000) == 0x4d000000)
3141 {
3142 /* GD->IE transition.
3143 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3144 insn = 0x5822c000;
3145 }
3146 else
3147 {
3148 /* GD->IE transition.
3149 brasl %r14,__tls_get_addr@plt ->
3150 l %r2,0(%r2,%r12) ; bcr 0,0 */
3151 insn = 0x5822c000;
3152 bfd_put_16 (output_bfd, 0x0700,
3153 contents + rel->r_offset + 4);
3154 }
3155 }
3156 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3157 }
3158 else if (r_type == R_390_TLS_LDCALL)
3159 {
3160 if (!bfd_link_pic (info))
3161 {
3162 unsigned int insn;
3163
3164 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3165 if ((insn & 0xff000fff) != 0x4d000000 &&
3166 (insn & 0xffff0000) != 0xc0e50000 &&
3167 (insn & 0xff000000) != 0x0d000000)
3168 {
3169 invalid_tls_insn (input_bfd, input_section, rel);
3170 return FALSE;
3171 }
3172
3173 if ((insn & 0xff000000) == 0x0d000000)
3174 {
3175 /* LD->LE transition.
3176 basr rx, ry -> nopr r7 */
3177 insn = 0x07070000 | (insn & 0xffff);
3178 }
3179 else if ((insn & 0xff000000) == 0x4d000000)
3180 {
3181 /* LD->LE transition.
3182 bas %r14,0(%rx,%r13) -> bc 0,0 */
3183 insn = 0x47000000;
3184 }
3185 else
3186 {
3187 /* LD->LE transition.
3188 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3189 insn = 0xc0040000;
3190 bfd_put_16 (output_bfd, 0x0000,
3191 contents + rel->r_offset + 4);
3192 }
3193 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3194 }
3195 }
3196 continue;
3197
3198 default:
3199 break;
3200 }
3201
3202 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3203 because such sections are not SEC_ALLOC and thus ld.so will
3204 not process them. */
3205 if (unresolved_reloc
3206 && !((input_section->flags & SEC_DEBUGGING) != 0
3207 && h->def_dynamic)
3208 && _bfd_elf_section_offset (output_bfd, info, input_section,
3209 rel->r_offset) != (bfd_vma) -1)
3210 _bfd_error_handler
3211 /* xgettext:c-format */
3212 (_("%pB(%pA+%#" PRIx64 "): "
3213 "unresolvable %s relocation against symbol `%s'"),
3214 input_bfd,
3215 input_section,
3216 (uint64_t) rel->r_offset,
3217 howto->name,
3218 h->root.root.string);
3219
3220 do_relocation:
3221
3222 /* When applying a 24 bit reloc we need to start one byte
3223 earlier. Otherwise the 32 bit get/put bfd operations might
3224 access a byte after the actual section. */
3225 if (r_type == R_390_PC24DBL
3226 || r_type == R_390_PLT24DBL)
3227 rel->r_offset--;
3228
3229 if (r_type == R_390_20
3230 || r_type == R_390_GOT20
3231 || r_type == R_390_GOTPLT20
3232 || r_type == R_390_TLS_GOTIE20)
3233 {
3234 relocation += rel->r_addend;
3235 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3236 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3237 contents, rel->r_offset,
3238 relocation, 0);
3239 }
3240 else
3241 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3242 contents, rel->r_offset,
3243 relocation, rel->r_addend);
3244
3245 if (r != bfd_reloc_ok)
3246 {
3247 const char *name;
3248
3249 if (h != NULL)
3250 name = h->root.root.string;
3251 else
3252 {
3253 name = bfd_elf_string_from_elf_section (input_bfd,
3254 symtab_hdr->sh_link,
3255 sym->st_name);
3256 if (name == NULL)
3257 return FALSE;
3258 if (*name == '\0')
3259 name = bfd_section_name (input_bfd, sec);
3260 }
3261
3262 if (r == bfd_reloc_overflow)
3263 (*info->callbacks->reloc_overflow)
3264 (info, (h ? &h->root : NULL), name, howto->name,
3265 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3266 else
3267 {
3268 _bfd_error_handler
3269 /* xgettext:c-format */
3270 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3271 input_bfd, input_section,
3272 (uint64_t) rel->r_offset, name, (int) r);
3273 return FALSE;
3274 }
3275 }
3276 }
3277
3278 return TRUE;
3279 }
3280
3281 /* Generate the PLT slots together with the dynamic relocations needed
3282 for IFUNC symbols. */
3283
3284 static void
3285 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3286 struct bfd_link_info *info,
3287 struct elf_link_hash_entry *h,
3288 struct elf_s390_link_hash_table *htab,
3289 bfd_vma iplt_offset,
3290 bfd_vma resolver_address)
3291 {
3292 bfd_vma iplt_index;
3293 bfd_vma got_offset;
3294 bfd_vma igotiplt_offset;
3295 Elf_Internal_Rela rela;
3296 bfd_byte *loc;
3297 asection *plt, *gotplt, *relplt;
3298 bfd_vma relative_offset;
3299
3300 if (htab->elf.iplt == NULL
3301 || htab->elf.igotplt == NULL
3302 || htab->elf.irelplt == NULL)
3303 abort ();
3304
3305 gotplt = htab->elf.igotplt;
3306 relplt = htab->elf.irelplt;
3307
3308 /* Index of the PLT slot within iplt section. */
3309 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3310 plt = htab->elf.iplt;
3311 /* Offset into the igot.plt section. */
3312 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3313 /* Offset into the got section. */
3314 got_offset = igotiplt_offset + gotplt->output_offset;
3315
3316 /* S390 uses halfwords for relative branch calc! */
3317 relative_offset = - (plt->output_offset +
3318 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3319 /* If offset is > 32768, branch to a previous branch
3320 390 can only handle +-64 K jumps. */
3321 if ( -32768 > (int) relative_offset )
3322 relative_offset
3323 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3324
3325 /* Fill in the entry in the procedure linkage table. */
3326 if (!bfd_link_pic (info))
3327 {
3328 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3329 PLT_ENTRY_SIZE);
3330
3331 /* Adjust jump to the first plt entry. */
3332 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3333 plt->contents + iplt_offset + 20);
3334
3335 /* Push the GOT offset field. */
3336 bfd_put_32 (output_bfd,
3337 (gotplt->output_section->vma
3338 + got_offset),
3339 plt->contents + iplt_offset + 24);
3340 }
3341 else if (got_offset < 4096)
3342 {
3343 /* The GOT offset is small enough to be used directly as
3344 displacement. */
3345 memcpy (plt->contents + iplt_offset,
3346 elf_s390_plt_pic12_entry,
3347 PLT_ENTRY_SIZE);
3348
3349 /* Put in the GOT offset as displacement value. The 0xc000
3350 value comes from the first word of the plt entry. Look
3351 at the elf_s390_plt_pic16_entry content. */
3352 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3353 plt->contents + iplt_offset + 2);
3354
3355 /* Adjust the jump to the first plt entry. */
3356 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3357 plt->contents + iplt_offset + 20);
3358 }
3359 else if (got_offset < 32768)
3360 {
3361 /* The GOT offset is too big for a displacement but small
3362 enough to be a signed 16 bit immediate value as it can be
3363 used in an lhi instruction. */
3364 memcpy (plt->contents + iplt_offset,
3365 elf_s390_plt_pic16_entry,
3366 PLT_ENTRY_SIZE);
3367
3368 /* Put in the GOT offset for the lhi instruction. */
3369 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3370 plt->contents + iplt_offset + 2);
3371
3372 /* Adjust the jump to the first plt entry. */
3373 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3374 plt->contents + iplt_offset + 20);
3375 }
3376 else
3377 {
3378 memcpy (plt->contents + iplt_offset,
3379 elf_s390_plt_pic_entry,
3380 PLT_ENTRY_SIZE);
3381
3382 /* Adjust the jump to the first plt entry. */
3383 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3384 plt->contents + iplt_offset + 20);
3385
3386 /* Push the GOT offset field. */
3387 bfd_put_32 (output_bfd, got_offset,
3388 plt->contents + iplt_offset + 24);
3389 }
3390 /* Insert offset into reloc. table here. */
3391 bfd_put_32 (output_bfd, relplt->output_offset +
3392 iplt_index * RELA_ENTRY_SIZE,
3393 plt->contents + iplt_offset + 28);
3394
3395 /* Fill in the entry in the global offset table.
3396 Points to instruction after GOT offset. */
3397 bfd_put_32 (output_bfd,
3398 (plt->output_section->vma
3399 + plt->output_offset
3400 + iplt_offset
3401 + 12),
3402 gotplt->contents + igotiplt_offset);
3403
3404 /* Fill in the entry in the .rela.plt section. */
3405 rela.r_offset = gotplt->output_section->vma + got_offset;
3406
3407 if (!h
3408 || h->dynindx == -1
3409 || ((bfd_link_executable (info)
3410 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3411 && h->def_regular))
3412 {
3413 /* The symbol can be locally resolved. */
3414 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3415 rela.r_addend = resolver_address;
3416 }
3417 else
3418 {
3419 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3420 rela.r_addend = 0;
3421 }
3422
3423 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3424 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3425 }
3426
3427 /* Finish up dynamic symbol handling. We set the contents of various
3428 dynamic sections here. */
3429
3430 static bfd_boolean
3431 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3432 struct bfd_link_info *info,
3433 struct elf_link_hash_entry *h,
3434 Elf_Internal_Sym *sym)
3435 {
3436 struct elf_s390_link_hash_table *htab;
3437 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3438
3439 htab = elf_s390_hash_table (info);
3440
3441 if (h->plt.offset != (bfd_vma) -1)
3442 {
3443 bfd_vma plt_index;
3444 bfd_vma got_offset;
3445 Elf_Internal_Rela rela;
3446 bfd_byte *loc;
3447 bfd_vma relative_offset;
3448
3449 /* This symbol has an entry in the procedure linkage table. Set
3450 it up. */
3451 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3452 {
3453 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3454 htab, h->plt.offset,
3455 eh->ifunc_resolver_address +
3456 eh->ifunc_resolver_section->output_offset +
3457 eh->ifunc_resolver_section->output_section->vma);
3458 /* Do not return yet. Handling of explicit GOT slots of
3459 IFUNC symbols is below. */
3460 }
3461 else
3462 {
3463 if (h->dynindx == -1
3464 || htab->elf.splt == NULL
3465 || htab->elf.sgotplt == NULL
3466 || htab->elf.srelplt == NULL)
3467 abort ();
3468
3469 /* Calc. index no.
3470 Current offset - size first entry / entry size. */
3471 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3472
3473 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3474 addr & GOT addr. */
3475 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3476
3477 /* S390 uses halfwords for relative branch calc! */
3478 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3479 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3480 /* If offset is > 32768, branch to a previous branch
3481 390 can only handle +-64 K jumps. */
3482 if ( -32768 > (int) relative_offset )
3483 relative_offset
3484 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3485
3486 /* Fill in the entry in the procedure linkage table. */
3487 if (!bfd_link_pic (info))
3488 {
3489 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3490 PLT_ENTRY_SIZE);
3491
3492 /* Adjust jump to the first plt entry. */
3493 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3494 htab->elf.splt->contents + h->plt.offset + 20);
3495
3496 /* Push the GOT offset field. */
3497 bfd_put_32 (output_bfd,
3498 (htab->elf.sgotplt->output_section->vma
3499 + htab->elf.sgotplt->output_offset
3500 + got_offset),
3501 htab->elf.splt->contents + h->plt.offset + 24);
3502 }
3503 else if (got_offset < 4096)
3504 {
3505 /* The GOT offset is small enough to be used directly as
3506 displacement. */
3507 memcpy (htab->elf.splt->contents + h->plt.offset,
3508 elf_s390_plt_pic12_entry,
3509 PLT_ENTRY_SIZE);
3510
3511 /* Put in the GOT offset as displacement value. The 0xc000
3512 value comes from the first word of the plt entry. Look
3513 at the elf_s390_plt_pic12_entry content. */
3514 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3515 htab->elf.splt->contents + h->plt.offset + 2);
3516
3517 /* Adjust the jump to the first plt entry. */
3518 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3519 htab->elf.splt->contents + h->plt.offset + 20);
3520 }
3521 else if (got_offset < 32768)
3522 {
3523 /* The GOT offset is too big for a displacement but small
3524 enough to be a signed 16 bit immediate value as it can be
3525 used in an lhi instruction. */
3526 memcpy (htab->elf.splt->contents + h->plt.offset,
3527 elf_s390_plt_pic16_entry,
3528 PLT_ENTRY_SIZE);
3529
3530 /* Put in the GOT offset for the lhi instruction. */
3531 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3532 htab->elf.splt->contents + h->plt.offset + 2);
3533
3534 /* Adjust the jump to the first plt entry. */
3535 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3536 htab->elf.splt->contents + h->plt.offset + 20);
3537 }
3538 else
3539 {
3540 memcpy (htab->elf.splt->contents + h->plt.offset,
3541 elf_s390_plt_pic_entry,
3542 PLT_ENTRY_SIZE);
3543
3544 /* Adjust the jump to the first plt entry. */
3545 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3546 htab->elf.splt->contents + h->plt.offset + 20);
3547
3548 /* Push the GOT offset field. */
3549 bfd_put_32 (output_bfd, got_offset,
3550 htab->elf.splt->contents + h->plt.offset + 24);
3551 }
3552 /* Insert offset into reloc. table here. */
3553 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3554 htab->elf.splt->contents + h->plt.offset + 28);
3555
3556 /* Fill in the entry in the global offset table.
3557 Points to instruction after GOT offset. */
3558 bfd_put_32 (output_bfd,
3559 (htab->elf.splt->output_section->vma
3560 + htab->elf.splt->output_offset
3561 + h->plt.offset
3562 + 12),
3563 htab->elf.sgotplt->contents + got_offset);
3564
3565 /* Fill in the entry in the .rela.plt section. */
3566 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3567 + htab->elf.sgotplt->output_offset
3568 + got_offset);
3569 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3570 rela.r_addend = 0;
3571 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3572 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3573
3574 if (!h->def_regular)
3575 {
3576 /* Mark the symbol as undefined, rather than as defined in
3577 the .plt section. Leave the value alone. This is a clue
3578 for the dynamic linker, to make function pointer
3579 comparisons work between an application and shared
3580 library. */
3581 sym->st_shndx = SHN_UNDEF;
3582 }
3583 }
3584 }
3585
3586 if (h->got.offset != (bfd_vma) -1
3587 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3588 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3589 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3590 {
3591 Elf_Internal_Rela rela;
3592 bfd_byte *loc;
3593
3594 /* This symbol has an entry in the global offset table. Set it
3595 up. */
3596
3597 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3598 abort ();
3599
3600 rela.r_offset = (htab->elf.sgot->output_section->vma
3601 + htab->elf.sgot->output_offset
3602 + (h->got.offset &~ (bfd_vma) 1));
3603
3604 /* If this is a static link, or it is a -Bsymbolic link and the
3605 symbol is defined locally or was forced to be local because
3606 of a version file, we just want to emit a RELATIVE reloc.
3607 The entry in the global offset table will already have been
3608 initialized in the relocate_section function. */
3609 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3610 {
3611 if (bfd_link_pic (info))
3612 {
3613 /* An explicit GOT slot usage needs GLOB_DAT. If the
3614 symbol references local the implicit got.iplt slot
3615 will be used and the IRELATIVE reloc has been created
3616 above. */
3617 goto do_glob_dat;
3618 }
3619 else
3620 {
3621 /* For non-shared objects explicit GOT slots must be
3622 filled with the PLT slot address for pointer
3623 equality reasons. */
3624 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3625 + htab->elf.iplt->output_offset
3626 + h->plt.offset),
3627 htab->elf.sgot->contents + h->got.offset);
3628 return TRUE;
3629 }
3630 }
3631 else if (bfd_link_pic (info)
3632 && SYMBOL_REFERENCES_LOCAL (info, h))
3633 {
3634 /* If this is a static link, or it is a -Bsymbolic link and
3635 the symbol is defined locally or was forced to be local
3636 because of a version file, we just want to emit a
3637 RELATIVE reloc. The entry in the global offset table
3638 will already have been initialized in the
3639 relocate_section function. */
3640 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3641 return FALSE;
3642 BFD_ASSERT((h->got.offset & 1) != 0);
3643 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3644 rela.r_addend = (h->root.u.def.value
3645 + h->root.u.def.section->output_section->vma
3646 + h->root.u.def.section->output_offset);
3647 }
3648 else
3649 {
3650 BFD_ASSERT((h->got.offset & 1) == 0);
3651 do_glob_dat:
3652 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3653 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3654 rela.r_addend = 0;
3655 }
3656
3657 loc = htab->elf.srelgot->contents;
3658 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3659 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3660 }
3661
3662 if (h->needs_copy)
3663 {
3664 Elf_Internal_Rela rela;
3665 asection *s;
3666 bfd_byte *loc;
3667
3668 /* This symbols needs a copy reloc. Set it up. */
3669
3670 if (h->dynindx == -1
3671 || (h->root.type != bfd_link_hash_defined
3672 && h->root.type != bfd_link_hash_defweak)
3673 || htab->elf.srelbss == NULL
3674 || htab->elf.sreldynrelro == NULL)
3675 abort ();
3676
3677 rela.r_offset = (h->root.u.def.value
3678 + h->root.u.def.section->output_section->vma
3679 + h->root.u.def.section->output_offset);
3680 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3681 rela.r_addend = 0;
3682 if (h->root.u.def.section == htab->elf.sdynrelro)
3683 s = htab->elf.sreldynrelro;
3684 else
3685 s = htab->elf.srelbss;
3686 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3687 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3688 }
3689
3690 /* Mark some specially defined symbols as absolute. */
3691 if (h == htab->elf.hdynamic
3692 || h == htab->elf.hgot
3693 || h == htab->elf.hplt)
3694 sym->st_shndx = SHN_ABS;
3695
3696 return TRUE;
3697 }
3698
3699 /* Used to decide how to sort relocs in an optimal manner for the
3700 dynamic linker, before writing them out. */
3701
3702 static enum elf_reloc_type_class
3703 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3704 const asection *rel_sec ATTRIBUTE_UNUSED,
3705 const Elf_Internal_Rela *rela)
3706 {
3707 bfd *abfd = info->output_bfd;
3708 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3709 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3710 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3711 Elf_Internal_Sym sym;
3712
3713 if (htab->elf.dynsym == NULL
3714 || !bed->s->swap_symbol_in (abfd,
3715 (htab->elf.dynsym->contents
3716 + r_symndx * bed->s->sizeof_sym),
3717 0, &sym))
3718 abort ();
3719
3720 /* Check relocation against STT_GNU_IFUNC symbol. */
3721 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3722 return reloc_class_ifunc;
3723
3724 switch ((int) ELF32_R_TYPE (rela->r_info))
3725 {
3726 case R_390_RELATIVE:
3727 return reloc_class_relative;
3728 case R_390_JMP_SLOT:
3729 return reloc_class_plt;
3730 case R_390_COPY:
3731 return reloc_class_copy;
3732 default:
3733 return reloc_class_normal;
3734 }
3735 }
3736
3737 /* Finish up the dynamic sections. */
3738
3739 static bfd_boolean
3740 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3741 struct bfd_link_info *info)
3742 {
3743 struct elf_s390_link_hash_table *htab;
3744 bfd *dynobj;
3745 asection *sdyn;
3746 bfd *ibfd;
3747 unsigned int i;
3748
3749 htab = elf_s390_hash_table (info);
3750 dynobj = htab->elf.dynobj;
3751 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3752
3753 if (htab->elf.dynamic_sections_created)
3754 {
3755 Elf32_External_Dyn *dyncon, *dynconend;
3756
3757 if (sdyn == NULL || htab->elf.sgot == NULL)
3758 abort ();
3759
3760 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3761 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3762 for (; dyncon < dynconend; dyncon++)
3763 {
3764 Elf_Internal_Dyn dyn;
3765 asection *s;
3766
3767 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3768
3769 switch (dyn.d_tag)
3770 {
3771 default:
3772 continue;
3773
3774 case DT_PLTGOT:
3775 s = htab->elf.sgotplt;
3776 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3777 break;
3778
3779 case DT_JMPREL:
3780 s = htab->elf.srelplt;
3781 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3782 break;
3783
3784 case DT_PLTRELSZ:
3785 dyn.d_un.d_val = htab->elf.srelplt->size;
3786 if (htab->elf.irelplt)
3787 dyn.d_un.d_val += htab->elf.irelplt->size;
3788 break;
3789 }
3790
3791 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3792 }
3793
3794 /* Fill in the special first entry in the procedure linkage table. */
3795 if (htab->elf.splt && htab->elf.splt->size > 0)
3796 {
3797 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3798 if (bfd_link_pic (info))
3799 {
3800 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3801 PLT_FIRST_ENTRY_SIZE);
3802 }
3803 else
3804 {
3805 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3806 PLT_FIRST_ENTRY_SIZE);
3807 bfd_put_32 (output_bfd,
3808 htab->elf.sgotplt->output_section->vma
3809 + htab->elf.sgotplt->output_offset,
3810 htab->elf.splt->contents + 24);
3811 }
3812 elf_section_data (htab->elf.splt->output_section)
3813 ->this_hdr.sh_entsize = 4;
3814 }
3815
3816 }
3817
3818 if (htab->elf.sgotplt)
3819 {
3820 /* Fill in the first three entries in the global offset table. */
3821 if (htab->elf.sgotplt->size > 0)
3822 {
3823 bfd_put_32 (output_bfd,
3824 (sdyn == NULL ? (bfd_vma) 0
3825 : sdyn->output_section->vma + sdyn->output_offset),
3826 htab->elf.sgotplt->contents);
3827 /* One entry for shared object struct ptr. */
3828 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3829 /* One entry for _dl_runtime_resolve. */
3830 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3831 }
3832
3833 elf_section_data (htab->elf.sgotplt->output_section)
3834 ->this_hdr.sh_entsize = 4;
3835 }
3836 /* Finish dynamic symbol for local IFUNC symbols. */
3837 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3838 {
3839 struct plt_entry *local_plt;
3840 Elf_Internal_Sym *isym;
3841 Elf_Internal_Shdr *symtab_hdr;
3842
3843 symtab_hdr = &elf_symtab_hdr (ibfd);
3844
3845 if (!is_s390_elf (ibfd))
3846 continue;
3847
3848 local_plt = elf_s390_local_plt (ibfd);
3849 if (local_plt != NULL)
3850 for (i = 0; i < symtab_hdr->sh_info; i++)
3851 {
3852 if (local_plt[i].plt.offset != (bfd_vma) -1)
3853 {
3854 asection *sec = local_plt[i].sec;
3855 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3856 if (isym == NULL)
3857 return FALSE;
3858
3859 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3860 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3861 local_plt[i].plt.offset,
3862 isym->st_value
3863 + sec->output_section->vma
3864 + sec->output_offset);
3865
3866 }
3867 }
3868 }
3869 return TRUE;
3870 }
3871 \f
3872 /* Support for core dump NOTE sections. */
3873
3874 static bfd_boolean
3875 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3876 {
3877 int offset;
3878 unsigned int size;
3879
3880 switch (note->descsz)
3881 {
3882 default:
3883 return FALSE;
3884
3885 case 224: /* S/390 Linux. */
3886 /* pr_cursig */
3887 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3888
3889 /* pr_pid */
3890 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3891
3892 /* pr_reg */
3893 offset = 72;
3894 size = 144;
3895 break;
3896 }
3897
3898 /* Make a ".reg/999" section. */
3899 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3900 size, note->descpos + offset);
3901 }
3902
3903 static bfd_boolean
3904 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3905 {
3906 switch (note->descsz)
3907 {
3908 default:
3909 return FALSE;
3910
3911 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3912 elf_tdata (abfd)->core->pid
3913 = bfd_get_32 (abfd, note->descdata + 12);
3914 elf_tdata (abfd)->core->program
3915 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3916 elf_tdata (abfd)->core->command
3917 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3918 break;
3919 }
3920
3921 /* Note that for some reason, a spurious space is tacked
3922 onto the end of the args in some (at least one anyway)
3923 implementations, so strip it off if it exists. */
3924
3925 {
3926 char *command = elf_tdata (abfd)->core->command;
3927 int n = strlen (command);
3928
3929 if (0 < n && command[n - 1] == ' ')
3930 command[n - 1] = '\0';
3931 }
3932
3933 return TRUE;
3934 }
3935
3936 static char *
3937 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3938 int note_type, ...)
3939 {
3940 va_list ap;
3941
3942 switch (note_type)
3943 {
3944 default:
3945 return NULL;
3946
3947 case NT_PRPSINFO:
3948 {
3949 char data[124] ATTRIBUTE_NONSTRING = { 0 };
3950 const char *fname, *psargs;
3951
3952 va_start (ap, note_type);
3953 fname = va_arg (ap, const char *);
3954 psargs = va_arg (ap, const char *);
3955 va_end (ap);
3956
3957 strncpy (data + 28, fname, 16);
3958 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3959 DIAGNOSTIC_PUSH;
3960 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3961 -Wstringop-truncation:
3962 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3963 */
3964 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3965 #endif
3966 strncpy (data + 44, psargs, 80);
3967 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3968 DIAGNOSTIC_POP;
3969 #endif
3970 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3971 &data, sizeof (data));
3972 }
3973
3974 case NT_PRSTATUS:
3975 {
3976 char data[224] = { 0 };
3977 long pid;
3978 int cursig;
3979 const void *gregs;
3980
3981 va_start (ap, note_type);
3982 pid = va_arg (ap, long);
3983 cursig = va_arg (ap, int);
3984 gregs = va_arg (ap, const void *);
3985 va_end (ap);
3986
3987 bfd_put_16 (abfd, cursig, data + 12);
3988 bfd_put_32 (abfd, pid, data + 24);
3989 memcpy (data + 72, gregs, 144);
3990 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3991 &data, sizeof (data));
3992 }
3993 }
3994 /* NOTREACHED */
3995 }
3996 \f
3997 /* Return address for Ith PLT stub in section PLT, for relocation REL
3998 or (bfd_vma) -1 if it should not be included. */
3999
4000 static bfd_vma
4001 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4002 const arelent *rel ATTRIBUTE_UNUSED)
4003 {
4004 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4005 }
4006
4007 /* Merge backend specific data from an object file to the output
4008 object file when linking. */
4009
4010 static bfd_boolean
4011 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4012 {
4013 bfd *obfd = info->output_bfd;
4014
4015 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4016 return TRUE;
4017
4018 if (!elf_s390_merge_obj_attributes (ibfd, info))
4019 return FALSE;
4020
4021 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4022 return TRUE;
4023 }
4024
4025
4026 #define TARGET_BIG_SYM s390_elf32_vec
4027 #define TARGET_BIG_NAME "elf32-s390"
4028 #define ELF_ARCH bfd_arch_s390
4029 #define ELF_TARGET_ID S390_ELF_DATA
4030 #define ELF_MACHINE_CODE EM_S390
4031 #define ELF_MACHINE_ALT1 EM_S390_OLD
4032 #define ELF_MAXPAGESIZE 0x1000
4033
4034 #define elf_backend_can_gc_sections 1
4035 #define elf_backend_can_refcount 1
4036 #define elf_backend_want_got_plt 1
4037 #define elf_backend_plt_readonly 1
4038 #define elf_backend_want_plt_sym 0
4039 #define elf_backend_got_header_size 12
4040 #define elf_backend_want_dynrelro 1
4041 #define elf_backend_rela_normal 1
4042
4043 #define elf_info_to_howto elf_s390_info_to_howto
4044
4045 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4046 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4047 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4048 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4049
4050 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4051
4052 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4053 #define elf_backend_check_relocs elf_s390_check_relocs
4054 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4055 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4056 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4057 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4058 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4059 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4060 #define elf_backend_relocate_section elf_s390_relocate_section
4061 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4062 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4063 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4064 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4065 #define elf_backend_write_core_note elf_s390_write_core_note
4066 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4067 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4068
4069 #define bfd_elf32_mkobject elf_s390_mkobject
4070 #define elf_backend_object_p elf_s390_object_p
4071
4072 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4073
4074 #include "elf32-target.h"
GDB Binutils - Deliverables
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