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