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