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dynrelro section for read-only dynamic symbols copied into executable
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2016 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 void
327 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
328 arelent *cache_ptr,
329 Elf_Internal_Rela *dst)
330 {
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
332 switch (r_type)
333 {
334 case R_390_GNU_VTINHERIT:
335 cache_ptr->howto = &elf32_s390_vtinherit_howto;
336 break;
337
338 case R_390_GNU_VTENTRY:
339 cache_ptr->howto = &elf32_s390_vtentry_howto;
340 break;
341
342 default:
343 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
344 {
345 /* xgettext:c-format */
346 _bfd_error_handler (_("%B: invalid relocation type %d"),
347 abfd, (int) r_type);
348 r_type = R_390_NONE;
349 }
350 cache_ptr->howto = &elf_howto_table[r_type];
351 }
352 }
353
354 /* A relocation function which doesn't do anything. */
355 static bfd_reloc_status_type
356 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
357 arelent *reloc_entry,
358 asymbol *symbol ATTRIBUTE_UNUSED,
359 void * data ATTRIBUTE_UNUSED,
360 asection *input_section,
361 bfd *output_bfd,
362 char **error_message ATTRIBUTE_UNUSED)
363 {
364 if (output_bfd)
365 reloc_entry->address += input_section->output_offset;
366 return bfd_reloc_ok;
367 }
368
369 /* Handle the large displacement relocs. */
370 static bfd_reloc_status_type
371 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
372 arelent *reloc_entry,
373 asymbol *symbol,
374 void * data ATTRIBUTE_UNUSED,
375 asection *input_section,
376 bfd *output_bfd,
377 char **error_message ATTRIBUTE_UNUSED)
378 {
379 reloc_howto_type *howto = reloc_entry->howto;
380 bfd_vma relocation;
381 bfd_vma insn;
382
383 if (output_bfd != (bfd *) NULL
384 && (symbol->flags & BSF_SECTION_SYM) == 0
385 && (! howto->partial_inplace
386 || reloc_entry->addend == 0))
387 {
388 reloc_entry->address += input_section->output_offset;
389 return bfd_reloc_ok;
390 }
391
392 if (output_bfd != NULL)
393 return bfd_reloc_continue;
394
395 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
396 return bfd_reloc_outofrange;
397
398 relocation = (symbol->value
399 + symbol->section->output_section->vma
400 + symbol->section->output_offset);
401 relocation += reloc_entry->addend;
402 if (howto->pc_relative)
403 {
404 relocation -= (input_section->output_section->vma
405 + input_section->output_offset);
406 relocation -= reloc_entry->address;
407 }
408
409 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
410 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
411 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
412
413 if ((bfd_signed_vma) relocation < - 0x80000
414 || (bfd_signed_vma) relocation > 0x7ffff)
415 return bfd_reloc_overflow;
416 else
417 return bfd_reloc_ok;
418 }
419
420 static bfd_boolean
421 elf_s390_is_local_label_name (bfd *abfd, const char *name)
422 {
423 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
424 return TRUE;
425
426 return _bfd_elf_is_local_label_name (abfd, name);
427 }
428
429 /* Functions for the 390 ELF linker. */
430
431 /* The name of the dynamic interpreter. This is put in the .interp
432 section. */
433
434 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
435
436 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
437 copying dynamic variables from a shared lib into an app's dynbss
438 section, and instead use a dynamic relocation to point into the
439 shared lib. */
440 #define ELIMINATE_COPY_RELOCS 1
441
442 /* The size in bytes of the first entry in the procedure linkage table. */
443 #define PLT_FIRST_ENTRY_SIZE 32
444 /* The size in bytes of an entry in the procedure linkage table. */
445 #define PLT_ENTRY_SIZE 32
446
447 #define GOT_ENTRY_SIZE 4
448
449 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
450
451 /* The first three entries in a procedure linkage table are reserved,
452 and the initial contents are unimportant (we zero them out).
453 Subsequent entries look like this. See the SVR4 ABI 386
454 supplement to see how this works. */
455
456 /* For the s390, simple addr offset can only be 0 - 4096.
457 To use the full 2 GB address space, several instructions
458 are needed to load an address in a register and execute
459 a branch( or just saving the address)
460
461 Furthermore, only r 0 and 1 are free to use!!! */
462
463 /* The first 3 words in the GOT are then reserved.
464 Word 0 is the address of the dynamic table.
465 Word 1 is a pointer to a structure describing the object
466 Word 2 is used to point to the loader entry address.
467
468 The code for position independent PLT entries looks like this:
469
470 r12 holds addr of the current GOT at entry to the PLT
471
472 The GOT holds the address in the PLT to be executed.
473 The loader then gets:
474 24(15) = Pointer to the structure describing the object.
475 28(15) = Offset into rela.plt
476
477 The loader must then find the module where the function is
478 and insert the address in the GOT.
479
480 Note: 390 can only address +- 64 K relative.
481 We check if offset > 65536, then make a relative branch -64xxx
482 back to a previous defined branch
483
484 PLT1: BASR 1,0 # 2 bytes
485 L 1,22(1) # 4 bytes Load offset in GOT in r 1
486 L 1,(1,12) # 4 bytes Load address from GOT in r1
487 BCR 15,1 # 2 bytes Jump to address
488 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
489 L 1,14(1) # 4 bytes Load offset in symol table in r1
490 BRC 15,-x # 4 bytes Jump to start of PLT
491 .word 0 # 2 bytes filler
492 .long ? # 4 bytes offset in GOT
493 .long ? # 4 bytes offset into rela.plt
494
495 This was the general case. There are two additional, optimizes PLT
496 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
497 First the one for GOT offsets < 4096:
498
499 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
500 BCR 15,1 # 2 bytes Jump to address
501 .word 0,0,0 # 6 bytes filler
502 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
503 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
504 BRC 15,-x # 4 bytes Jump to start of PLT
505 .word 0,0,0 # 6 bytes filler
506 .long ? # 4 bytes offset into rela.plt
507
508 Second the one for GOT offsets < 32768:
509
510 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
511 L 1,(1,12) # 4 bytes Load address from GOT to r1
512 BCR 15,1 # 2 bytes Jump to address
513 .word 0 # 2 bytes filler
514 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
515 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
516 BRC 15,-x # 4 bytes Jump to start of PLT
517 .word 0,0,0 # 6 bytes filler
518 .long ? # 4 bytes offset into rela.plt
519
520 Total = 32 bytes per PLT entry
521
522 The code for static build PLT entries looks like this:
523
524 PLT1: BASR 1,0 # 2 bytes
525 L 1,22(1) # 4 bytes Load address of GOT entry
526 L 1,0(0,1) # 4 bytes Load address from GOT in r1
527 BCR 15,1 # 2 bytes Jump to address
528 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
529 L 1,14(1) # 4 bytes Load offset in symbol table in r1
530 BRC 15,-x # 4 bytes Jump to start of PLT
531 .word 0 # 2 bytes filler
532 .long ? # 4 bytes address of GOT entry
533 .long ? # 4 bytes offset into rela.plt */
534
535 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
536 {
537 0x0d, 0x10, /* basr %r1,%r0 */
538 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
539 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
540 0x07, 0xf1, /* br %r1 */
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
543 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
544 0x00, 0x00, /* padding */
545 0x00, 0x00, 0x00, 0x00, /* GOT offset */
546 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
547 };
548
549 /* Generic PLT pic entry. */
550 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
551 {
552 0x0d, 0x10, /* basr %r1,%r0 */
553 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
554 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
555 0x07, 0xf1, /* br %r1 */
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
558 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
559 0x00, 0x00, /* padding */
560 0x00, 0x00, 0x00, 0x00, /* GOT offset */
561 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
562 };
563
564 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
565 when generating the PLT slot with the GOT offset. */
566 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
567 {
568 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
569 0x07, 0xf1, /* br %r1 */
570 0x00, 0x00, 0x00, 0x00, /* padding */
571 0x00, 0x00,
572 0x0d, 0x10, /* basr %r1,%r0 */
573 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
574 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
575 0x00, 0x00, 0x00, 0x00,
576 0x00, 0x00, 0x00, 0x00
577 };
578
579 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
580 when generating the PLT slot with the GOT offset. */
581 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
582 {
583 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
584 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
585 0x07, 0xf1, /* br %r1 */
586 0x00, 0x00,
587 0x0d, 0x10, /* basr %r1,%r0 */
588 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
589 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
590 0x00, 0x00, 0x00, 0x00,
591 0x00, 0x00, 0x00, 0x00,
592 0x00, 0x00
593 };
594
595 /* The first PLT entry pushes the offset into the rela.plt
596 from R1 onto the stack at 8(15) and the loader object info
597 at 12(15), loads the loader address in R1 and jumps to it. */
598
599 /* The first entry in the PLT for PIC code:
600
601 PLT0:
602 ST 1,28(15) # R1 has offset into rela.plt
603 L 1,4(12) # Get loader ino(object struct address)
604 ST 1,24(15) # Store address
605 L 1,8(12) # Entry address of loader in R1
606 BR 1 # Jump to loader
607
608 The first entry in the PLT for static code:
609
610 PLT0:
611 ST 1,28(15) # R1 has offset into rela.plt
612 BASR 1,0
613 L 1,18(0,1) # Get address of GOT
614 MVC 24(4,15),4(1) # Move loader ino to stack
615 L 1,8(1) # Get address of loader
616 BR 1 # Jump to loader
617 .word 0 # filler
618 .long got # address of GOT */
619
620 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
621 {
622 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
623 0x0d, 0x10, /* basr %r1,%r0 */
624 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
625 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
626 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
627 0x07, 0xf1, /* br %r1 */
628 0x00, 0x00, 0x00, 0x00,
629 0x00, 0x00, 0x00, 0x00,
630 0x00, 0x00
631 };
632
633 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
634 {
635 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
636 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
637 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
638 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
639 0x07, 0xf1, /* br %r1 */
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00, 0x00, 0x00,
642 0x00, 0x00, 0x00, 0x00,
643 0x00, 0x00
644 };
645
646
647 /* s390 ELF linker hash entry. */
648
649 struct elf_s390_link_hash_entry
650 {
651 struct elf_link_hash_entry elf;
652
653 /* Track dynamic relocs copied for this symbol. */
654 struct elf_dyn_relocs *dyn_relocs;
655
656 /* Number of GOTPLT references for a function. */
657 bfd_signed_vma gotplt_refcount;
658
659 #define GOT_UNKNOWN 0
660 #define GOT_NORMAL 1
661 #define GOT_TLS_GD 2
662 #define GOT_TLS_IE 3
663 #define GOT_TLS_IE_NLT 4
664 unsigned char tls_type;
665
666 /* For pointer equality reasons we might need to change the symbol
667 type from STT_GNU_IFUNC to STT_FUNC together with its value and
668 section entry. So after alloc_dynrelocs only these values should
669 be used. In order to check whether a symbol is IFUNC use
670 s390_is_ifunc_symbol_p. */
671 bfd_vma ifunc_resolver_address;
672 asection *ifunc_resolver_section;
673 };
674
675 #define elf_s390_hash_entry(ent) \
676 ((struct elf_s390_link_hash_entry *)(ent))
677
678 /* This structure represents an entry in the local PLT list needed for
679 local IFUNC symbols. */
680 struct plt_entry
681 {
682 /* The section of the local symbol.
683 Set in relocate_section and used in finish_dynamic_sections. */
684 asection *sec;
685
686 union
687 {
688 bfd_signed_vma refcount;
689 bfd_vma offset;
690 } plt;
691 };
692
693 /* NOTE: Keep this structure in sync with
694 the one declared in elf64-s390.c. */
695 struct elf_s390_obj_tdata
696 {
697 struct elf_obj_tdata root;
698
699 /* A local PLT is needed for ifunc symbols. */
700 struct plt_entry *local_plt;
701
702 /* TLS type for each local got entry. */
703 char *local_got_tls_type;
704 };
705
706 #define elf_s390_tdata(abfd) \
707 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
708
709 #define elf_s390_local_plt(abfd) \
710 (elf_s390_tdata (abfd)->local_plt)
711
712 #define elf_s390_local_got_tls_type(abfd) \
713 (elf_s390_tdata (abfd)->local_got_tls_type)
714
715 #define is_s390_elf(bfd) \
716 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
717 && elf_tdata (bfd) != NULL \
718 && elf_object_id (bfd) == S390_ELF_DATA)
719
720 static bfd_boolean
721 elf_s390_mkobject (bfd *abfd)
722 {
723 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
724 S390_ELF_DATA);
725 }
726
727 static bfd_boolean
728 elf_s390_object_p (bfd *abfd)
729 {
730 /* Set the right machine number for an s390 elf32 file. */
731 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
732 }
733
734 /* s390 ELF linker hash table. */
735
736 struct elf_s390_link_hash_table
737 {
738 struct elf_link_hash_table elf;
739
740 /* Short-cuts to get to dynamic linker sections. */
741 asection *irelifunc;
742
743 union
744 {
745 bfd_signed_vma refcount;
746 bfd_vma offset;
747 } tls_ldm_got;
748
749 /* Small local sym cache. */
750 struct sym_cache sym_cache;
751 };
752
753 /* Get the s390 ELF linker hash table from a link_info structure. */
754
755 #define elf_s390_hash_table(p) \
756 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
757 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
758
759 #undef ELF64
760 #include "elf-s390-common.c"
761
762 /* Create an entry in an s390 ELF linker hash table. */
763
764 static struct bfd_hash_entry *
765 link_hash_newfunc (struct bfd_hash_entry *entry,
766 struct bfd_hash_table *table,
767 const char *string)
768 {
769 /* Allocate the structure if it has not already been allocated by a
770 subclass. */
771 if (entry == NULL)
772 {
773 entry = bfd_hash_allocate (table,
774 sizeof (struct elf_s390_link_hash_entry));
775 if (entry == NULL)
776 return entry;
777 }
778
779 /* Call the allocation method of the superclass. */
780 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
781 if (entry != NULL)
782 {
783 struct elf_s390_link_hash_entry *eh;
784
785 eh = (struct elf_s390_link_hash_entry *) entry;
786 eh->dyn_relocs = NULL;
787 eh->gotplt_refcount = 0;
788 eh->tls_type = GOT_UNKNOWN;
789 eh->ifunc_resolver_address = 0;
790 eh->ifunc_resolver_section = NULL;
791 }
792
793 return entry;
794 }
795
796 /* Create an s390 ELF linker hash table. */
797
798 static struct bfd_link_hash_table *
799 elf_s390_link_hash_table_create (bfd *abfd)
800 {
801 struct elf_s390_link_hash_table *ret;
802 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
803
804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
805 if (ret == NULL)
806 return NULL;
807
808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
809 sizeof (struct elf_s390_link_hash_entry),
810 S390_ELF_DATA))
811 {
812 free (ret);
813 return NULL;
814 }
815
816 return &ret->elf.root;
817 }
818
819 /* Copy the extra info we tack onto an elf_link_hash_entry. */
820
821 static void
822 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
823 struct elf_link_hash_entry *dir,
824 struct elf_link_hash_entry *ind)
825 {
826 struct elf_s390_link_hash_entry *edir, *eind;
827
828 edir = (struct elf_s390_link_hash_entry *) dir;
829 eind = (struct elf_s390_link_hash_entry *) ind;
830
831 if (eind->dyn_relocs != NULL)
832 {
833 if (edir->dyn_relocs != NULL)
834 {
835 struct elf_dyn_relocs **pp;
836 struct elf_dyn_relocs *p;
837
838 /* Add reloc counts against the indirect sym to the direct sym
839 list. Merge any entries against the same section. */
840 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
841 {
842 struct elf_dyn_relocs *q;
843
844 for (q = edir->dyn_relocs; q != NULL; q = q->next)
845 if (q->sec == p->sec)
846 {
847 q->pc_count += p->pc_count;
848 q->count += p->count;
849 *pp = p->next;
850 break;
851 }
852 if (q == NULL)
853 pp = &p->next;
854 }
855 *pp = edir->dyn_relocs;
856 }
857
858 edir->dyn_relocs = eind->dyn_relocs;
859 eind->dyn_relocs = NULL;
860 }
861
862 if (ind->root.type == bfd_link_hash_indirect
863 && dir->got.refcount <= 0)
864 {
865 edir->tls_type = eind->tls_type;
866 eind->tls_type = GOT_UNKNOWN;
867 }
868
869 if (ELIMINATE_COPY_RELOCS
870 && ind->root.type != bfd_link_hash_indirect
871 && dir->dynamic_adjusted)
872 {
873 /* If called to transfer flags for a weakdef during processing
874 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
875 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
876 dir->ref_dynamic |= ind->ref_dynamic;
877 dir->ref_regular |= ind->ref_regular;
878 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
879 dir->needs_plt |= ind->needs_plt;
880 }
881 else
882 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
883 }
884
885 static int
886 elf_s390_tls_transition (struct bfd_link_info *info,
887 int r_type,
888 int is_local)
889 {
890 if (bfd_link_pic (info))
891 return r_type;
892
893 switch (r_type)
894 {
895 case R_390_TLS_GD32:
896 case R_390_TLS_IE32:
897 if (is_local)
898 return R_390_TLS_LE32;
899 return R_390_TLS_IE32;
900 case R_390_TLS_GOTIE32:
901 if (is_local)
902 return R_390_TLS_LE32;
903 return R_390_TLS_GOTIE32;
904 case R_390_TLS_LDM32:
905 return R_390_TLS_LE32;
906 }
907
908 return r_type;
909 }
910
911 /* Look through the relocs for a section during the first phase, and
912 allocate space in the global offset table or procedure linkage
913 table. */
914
915 static bfd_boolean
916 elf_s390_check_relocs (bfd *abfd,
917 struct bfd_link_info *info,
918 asection *sec,
919 const Elf_Internal_Rela *relocs)
920 {
921 struct elf_s390_link_hash_table *htab;
922 Elf_Internal_Shdr *symtab_hdr;
923 struct elf_link_hash_entry **sym_hashes;
924 const Elf_Internal_Rela *rel;
925 const Elf_Internal_Rela *rel_end;
926 asection *sreloc;
927 bfd_signed_vma *local_got_refcounts;
928 int tls_type, old_tls_type;
929 Elf_Internal_Sym *isym;
930
931 if (bfd_link_relocatable (info))
932 return TRUE;
933
934 BFD_ASSERT (is_s390_elf (abfd));
935
936 htab = elf_s390_hash_table (info);
937 symtab_hdr = &elf_symtab_hdr (abfd);
938 sym_hashes = elf_sym_hashes (abfd);
939 local_got_refcounts = elf_local_got_refcounts (abfd);
940
941 sreloc = NULL;
942
943 rel_end = relocs + sec->reloc_count;
944 for (rel = relocs; rel < rel_end; rel++)
945 {
946 unsigned int r_type;
947 unsigned long r_symndx;
948 struct elf_link_hash_entry *h;
949
950 r_symndx = ELF32_R_SYM (rel->r_info);
951
952 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
953 {
954 /* xgettext:c-format */
955 _bfd_error_handler (_("%B: bad symbol index: %d"),
956 abfd, r_symndx);
957 return FALSE;
958 }
959
960 if (r_symndx < symtab_hdr->sh_info)
961 {
962 /* A local symbol. */
963 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
964 abfd, r_symndx);
965 if (isym == NULL)
966 return FALSE;
967
968 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
969 {
970 struct plt_entry *plt;
971
972 if (htab->elf.dynobj == NULL)
973 htab->elf.dynobj = abfd;
974
975 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
976 return FALSE;
977
978 if (local_got_refcounts == NULL)
979 {
980 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
981 return FALSE;
982 local_got_refcounts = elf_local_got_refcounts (abfd);
983 }
984 plt = elf_s390_local_plt (abfd);
985 plt[r_symndx].plt.refcount++;
986 }
987 h = NULL;
988 }
989 else
990 {
991 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
992 while (h->root.type == bfd_link_hash_indirect
993 || h->root.type == bfd_link_hash_warning)
994 h = (struct elf_link_hash_entry *) h->root.u.i.link;
995
996 /* PR15323, ref flags aren't set for references in the same
997 object. */
998 h->root.non_ir_ref = 1;
999 }
1000
1001 /* Create got section and local_got_refcounts array if they
1002 are needed. */
1003 r_type = elf_s390_tls_transition (info,
1004 ELF32_R_TYPE (rel->r_info),
1005 h == NULL);
1006 switch (r_type)
1007 {
1008 case R_390_GOT12:
1009 case R_390_GOT16:
1010 case R_390_GOT20:
1011 case R_390_GOT32:
1012 case R_390_GOTENT:
1013 case R_390_GOTPLT12:
1014 case R_390_GOTPLT16:
1015 case R_390_GOTPLT20:
1016 case R_390_GOTPLT32:
1017 case R_390_GOTPLTENT:
1018 case R_390_TLS_GD32:
1019 case R_390_TLS_GOTIE12:
1020 case R_390_TLS_GOTIE20:
1021 case R_390_TLS_GOTIE32:
1022 case R_390_TLS_IEENT:
1023 case R_390_TLS_IE32:
1024 case R_390_TLS_LDM32:
1025 if (h == NULL
1026 && local_got_refcounts == NULL)
1027 {
1028 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1029 return FALSE;
1030 local_got_refcounts = elf_local_got_refcounts (abfd);
1031 }
1032 /* Fall through. */
1033 case R_390_GOTOFF16:
1034 case R_390_GOTOFF32:
1035 case R_390_GOTPC:
1036 case R_390_GOTPCDBL:
1037 if (htab->elf.sgot == NULL)
1038 {
1039 if (htab->elf.dynobj == NULL)
1040 htab->elf.dynobj = abfd;
1041 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1042 return FALSE;
1043 }
1044 }
1045
1046 if (h != NULL)
1047 {
1048 if (htab->elf.dynobj == NULL)
1049 htab->elf.dynobj = abfd;
1050 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1051 return FALSE;
1052
1053 /* Make sure an IFUNC symbol defined in a non-shared object
1054 always gets a PLT slot. */
1055 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1056 {
1057 /* The symbol is called by the dynamic loader in order
1058 to resolve the relocation. So it is in fact also
1059 referenced. */
1060 h->ref_regular = 1;
1061 h->needs_plt = 1;
1062 }
1063 }
1064 switch (r_type)
1065 {
1066 case R_390_GOTPC:
1067 case R_390_GOTPCDBL:
1068 /* These relocs do not need a GOT slot. They just load the
1069 GOT pointer itself or address something else relative to
1070 the GOT. Since the GOT pointer has been set up above we
1071 are done. */
1072 break;
1073 case R_390_GOTOFF16:
1074 case R_390_GOTOFF32:
1075 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1076 break;
1077 /* Fall through. */
1078
1079 case R_390_PLT12DBL:
1080 case R_390_PLT16DBL:
1081 case R_390_PLT24DBL:
1082 case R_390_PLT32DBL:
1083 case R_390_PLT32:
1084 case R_390_PLTOFF16:
1085 case R_390_PLTOFF32:
1086 /* This symbol requires a procedure linkage table entry. We
1087 actually build the entry in adjust_dynamic_symbol,
1088 because this might be a case of linking PIC code which is
1089 never referenced by a dynamic object, in which case we
1090 don't need to generate a procedure linkage table entry
1091 after all. */
1092
1093 /* If this is a local symbol, we resolve it directly without
1094 creating a procedure linkage table entry. */
1095 if (h != NULL)
1096 {
1097 h->needs_plt = 1;
1098 h->plt.refcount += 1;
1099 }
1100 break;
1101
1102 case R_390_GOTPLT12:
1103 case R_390_GOTPLT16:
1104 case R_390_GOTPLT20:
1105 case R_390_GOTPLT32:
1106 case R_390_GOTPLTENT:
1107 /* This symbol requires either a procedure linkage table entry
1108 or an entry in the local got. We actually build the entry
1109 in adjust_dynamic_symbol because whether this is really a
1110 global reference can change and with it the fact if we have
1111 to create a plt entry or a local got entry. To be able to
1112 make a once global symbol a local one we have to keep track
1113 of the number of gotplt references that exist for this
1114 symbol. */
1115 if (h != NULL)
1116 {
1117 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1118 h->needs_plt = 1;
1119 h->plt.refcount += 1;
1120 }
1121 else
1122 local_got_refcounts[r_symndx] += 1;
1123 break;
1124
1125 case R_390_TLS_LDM32:
1126 htab->tls_ldm_got.refcount += 1;
1127 break;
1128
1129 case R_390_TLS_IE32:
1130 case R_390_TLS_GOTIE12:
1131 case R_390_TLS_GOTIE20:
1132 case R_390_TLS_GOTIE32:
1133 case R_390_TLS_IEENT:
1134 if (bfd_link_pic (info))
1135 info->flags |= DF_STATIC_TLS;
1136 /* Fall through. */
1137
1138 case R_390_GOT12:
1139 case R_390_GOT16:
1140 case R_390_GOT20:
1141 case R_390_GOT32:
1142 case R_390_GOTENT:
1143 case R_390_TLS_GD32:
1144 /* This symbol requires a global offset table entry. */
1145 switch (r_type)
1146 {
1147 default:
1148 case R_390_GOT12:
1149 case R_390_GOT16:
1150 case R_390_GOT20:
1151 case R_390_GOT32:
1152 case R_390_GOTENT:
1153 tls_type = GOT_NORMAL;
1154 break;
1155 case R_390_TLS_GD32:
1156 tls_type = GOT_TLS_GD;
1157 break;
1158 case R_390_TLS_IE32:
1159 case R_390_TLS_GOTIE32:
1160 tls_type = GOT_TLS_IE;
1161 break;
1162 case R_390_TLS_GOTIE12:
1163 case R_390_TLS_GOTIE20:
1164 case R_390_TLS_IEENT:
1165 tls_type = GOT_TLS_IE_NLT;
1166 break;
1167 }
1168
1169 if (h != NULL)
1170 {
1171 h->got.refcount += 1;
1172 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1173 }
1174 else
1175 {
1176 local_got_refcounts[r_symndx] += 1;
1177 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1178 }
1179 /* If a TLS symbol is accessed using IE at least once,
1180 there is no point to use dynamic model for it. */
1181 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1182 {
1183 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1184 {
1185 _bfd_error_handler
1186 /* xgettext:c-format */
1187 (_("%B: `%s' accessed both as normal and thread local symbol"),
1188 abfd, h->root.root.string);
1189 return FALSE;
1190 }
1191 if (old_tls_type > tls_type)
1192 tls_type = old_tls_type;
1193 }
1194
1195 if (old_tls_type != tls_type)
1196 {
1197 if (h != NULL)
1198 elf_s390_hash_entry (h)->tls_type = tls_type;
1199 else
1200 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1201 }
1202
1203 if (r_type != R_390_TLS_IE32)
1204 break;
1205 /* Fall through. */
1206
1207 case R_390_TLS_LE32:
1208 /* For static linking and executables this reloc will be
1209 calculated at linktime otherwise a TLS_TPOFF runtime
1210 reloc will be generated. */
1211 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1212 break;
1213
1214 if (!bfd_link_pic (info))
1215 break;
1216 info->flags |= DF_STATIC_TLS;
1217 /* Fall through. */
1218
1219 case R_390_8:
1220 case R_390_16:
1221 case R_390_32:
1222 case R_390_PC16:
1223 case R_390_PC12DBL:
1224 case R_390_PC16DBL:
1225 case R_390_PC24DBL:
1226 case R_390_PC32DBL:
1227 case R_390_PC32:
1228 if (h != NULL && bfd_link_executable (info))
1229 {
1230 /* If this reloc is in a read-only section, we might
1231 need a copy reloc. We can't check reliably at this
1232 stage whether the section is read-only, as input
1233 sections have not yet been mapped to output sections.
1234 Tentatively set the flag for now, and correct in
1235 adjust_dynamic_symbol. */
1236 h->non_got_ref = 1;
1237
1238 if (!bfd_link_pic (info))
1239 {
1240 /* We may need a .plt entry if the function this reloc
1241 refers to is in a shared lib. */
1242 h->plt.refcount += 1;
1243 }
1244 }
1245
1246 /* If we are creating a shared library, and this is a reloc
1247 against a global symbol, or a non PC relative reloc
1248 against a local symbol, then we need to copy the reloc
1249 into the shared library. However, if we are linking with
1250 -Bsymbolic, we do not need to copy a reloc against a
1251 global symbol which is defined in an object we are
1252 including in the link (i.e., DEF_REGULAR is set). At
1253 this point we have not seen all the input files, so it is
1254 possible that DEF_REGULAR is not set now but will be set
1255 later (it is never cleared). In case of a weak definition,
1256 DEF_REGULAR may be cleared later by a strong definition in
1257 a shared library. We account for that possibility below by
1258 storing information in the relocs_copied field of the hash
1259 table entry. A similar situation occurs when creating
1260 shared libraries and symbol visibility changes render the
1261 symbol local.
1262
1263 If on the other hand, we are creating an executable, we
1264 may need to keep relocations for symbols satisfied by a
1265 dynamic library if we manage to avoid copy relocs for the
1266 symbol. */
1267 if ((bfd_link_pic (info)
1268 && (sec->flags & SEC_ALLOC) != 0
1269 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1270 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1272 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1273 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1274 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1275 || (h != NULL
1276 && (! SYMBOLIC_BIND (info, h)
1277 || h->root.type == bfd_link_hash_defweak
1278 || !h->def_regular))))
1279 || (ELIMINATE_COPY_RELOCS
1280 && !bfd_link_pic (info)
1281 && (sec->flags & SEC_ALLOC) != 0
1282 && h != NULL
1283 && (h->root.type == bfd_link_hash_defweak
1284 || !h->def_regular)))
1285 {
1286 struct elf_dyn_relocs *p;
1287 struct elf_dyn_relocs **head;
1288
1289 /* We must copy these reloc types into the output file.
1290 Create a reloc section in dynobj and make room for
1291 this reloc. */
1292 if (sreloc == NULL)
1293 {
1294 if (htab->elf.dynobj == NULL)
1295 htab->elf.dynobj = abfd;
1296
1297 sreloc = _bfd_elf_make_dynamic_reloc_section
1298 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1299
1300 if (sreloc == NULL)
1301 return FALSE;
1302 }
1303
1304 /* If this is a global symbol, we count the number of
1305 relocations we need for this symbol. */
1306 if (h != NULL)
1307 {
1308 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1309 }
1310 else
1311 {
1312 /* Track dynamic relocs needed for local syms too.
1313 We really need local syms available to do this
1314 easily. Oh well. */
1315 asection *s;
1316 void *vpp;
1317
1318 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1319 abfd, r_symndx);
1320 if (isym == NULL)
1321 return FALSE;
1322
1323 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1324 if (s == NULL)
1325 s = sec;
1326
1327 vpp = &elf_section_data (s)->local_dynrel;
1328 head = (struct elf_dyn_relocs **) vpp;
1329 }
1330
1331 p = *head;
1332 if (p == NULL || p->sec != sec)
1333 {
1334 bfd_size_type amt = sizeof *p;
1335
1336 p = ((struct elf_dyn_relocs *)
1337 bfd_alloc (htab->elf.dynobj, amt));
1338 if (p == NULL)
1339 return FALSE;
1340 p->next = *head;
1341 *head = p;
1342 p->sec = sec;
1343 p->count = 0;
1344 p->pc_count = 0;
1345 }
1346
1347 p->count += 1;
1348 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1349 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1353 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1354 p->pc_count += 1;
1355 }
1356 break;
1357
1358 /* This relocation describes the C++ object vtable hierarchy.
1359 Reconstruct it for later use during GC. */
1360 case R_390_GNU_VTINHERIT:
1361 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1362 return FALSE;
1363 break;
1364
1365 /* This relocation describes which C++ vtable entries are actually
1366 used. Record for later use during GC. */
1367 case R_390_GNU_VTENTRY:
1368 BFD_ASSERT (h != NULL);
1369 if (h != NULL
1370 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1371 return FALSE;
1372 break;
1373
1374 default:
1375 break;
1376 }
1377 }
1378
1379 return TRUE;
1380 }
1381
1382 /* Return the section that should be marked against GC for a given
1383 relocation. */
1384
1385 static asection *
1386 elf_s390_gc_mark_hook (asection *sec,
1387 struct bfd_link_info *info,
1388 Elf_Internal_Rela *rel,
1389 struct elf_link_hash_entry *h,
1390 Elf_Internal_Sym *sym)
1391 {
1392 if (h != NULL)
1393 switch (ELF32_R_TYPE (rel->r_info))
1394 {
1395 case R_390_GNU_VTINHERIT:
1396 case R_390_GNU_VTENTRY:
1397 return NULL;
1398 }
1399 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1400
1401 }
1402
1403 /* Update the got entry reference counts for the section being removed. */
1404
1405 static bfd_boolean
1406 elf_s390_gc_sweep_hook (bfd *abfd,
1407 struct bfd_link_info *info,
1408 asection *sec,
1409 const Elf_Internal_Rela *relocs)
1410 {
1411 struct elf_s390_link_hash_table *htab;
1412 Elf_Internal_Shdr *symtab_hdr;
1413 struct elf_link_hash_entry **sym_hashes;
1414 bfd_signed_vma *local_got_refcounts;
1415 const Elf_Internal_Rela *rel, *relend;
1416
1417 if (bfd_link_relocatable (info))
1418 return TRUE;
1419
1420 htab = elf_s390_hash_table (info);
1421 if (htab == NULL)
1422 return FALSE;
1423
1424 elf_section_data (sec)->local_dynrel = NULL;
1425
1426 symtab_hdr = &elf_symtab_hdr (abfd);
1427 sym_hashes = elf_sym_hashes (abfd);
1428 local_got_refcounts = elf_local_got_refcounts (abfd);
1429
1430 relend = relocs + sec->reloc_count;
1431 for (rel = relocs; rel < relend; rel++)
1432 {
1433 unsigned long r_symndx;
1434 unsigned int r_type;
1435 struct elf_link_hash_entry *h = NULL;
1436
1437 r_symndx = ELF32_R_SYM (rel->r_info);
1438 if (r_symndx >= symtab_hdr->sh_info)
1439 {
1440 struct elf_s390_link_hash_entry *eh;
1441 struct elf_dyn_relocs **pp;
1442 struct elf_dyn_relocs *p;
1443
1444 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1445 while (h->root.type == bfd_link_hash_indirect
1446 || h->root.type == bfd_link_hash_warning)
1447 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1448 eh = (struct elf_s390_link_hash_entry *) h;
1449
1450 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1451 if (p->sec == sec)
1452 {
1453 /* Everything must go for SEC. */
1454 *pp = p->next;
1455 break;
1456 }
1457 }
1458 else
1459 {
1460 Elf_Internal_Sym *isym;
1461
1462 /* A local symbol. */
1463 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1464 abfd, r_symndx);
1465 if (isym == NULL)
1466 return FALSE;
1467
1468 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1469 {
1470 struct plt_entry *plt = elf_s390_local_plt (abfd);
1471 if (plt[r_symndx].plt.refcount > 0)
1472 plt[r_symndx].plt.refcount--;
1473 }
1474 }
1475
1476 r_type = ELF32_R_TYPE (rel->r_info);
1477 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1478 switch (r_type)
1479 {
1480 case R_390_TLS_LDM32:
1481 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1482 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1483 break;
1484
1485 case R_390_GOTOFF16:
1486 case R_390_GOTOFF32:
1487 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1488 {
1489 h->plt.refcount--;
1490 break;
1491 }
1492
1493 case R_390_GOTPC:
1494 case R_390_GOTPCDBL:
1495 break;
1496
1497 case R_390_TLS_GD32:
1498 case R_390_TLS_IE32:
1499 case R_390_TLS_GOTIE12:
1500 case R_390_TLS_GOTIE20:
1501 case R_390_TLS_GOTIE32:
1502 case R_390_TLS_IEENT:
1503 case R_390_GOT12:
1504 case R_390_GOT16:
1505 case R_390_GOT20:
1506 case R_390_GOT32:
1507 case R_390_GOTENT:
1508 if (h != NULL)
1509 {
1510 if (h->got.refcount > 0)
1511 h->got.refcount -= 1;
1512 }
1513 else if (local_got_refcounts != NULL)
1514 {
1515 if (local_got_refcounts[r_symndx] > 0)
1516 local_got_refcounts[r_symndx] -= 1;
1517 }
1518 break;
1519
1520 case R_390_8:
1521 case R_390_12:
1522 case R_390_16:
1523 case R_390_20:
1524 case R_390_32:
1525 case R_390_PC16:
1526 case R_390_PC12DBL:
1527 case R_390_PC16DBL:
1528 case R_390_PC24DBL:
1529 case R_390_PC32DBL:
1530 case R_390_PC32:
1531 if (bfd_link_pic (info))
1532 break;
1533 /* Fall through. */
1534
1535 case R_390_PLT12DBL:
1536 case R_390_PLT16DBL:
1537 case R_390_PLT24DBL:
1538 case R_390_PLT32DBL:
1539 case R_390_PLT32:
1540 case R_390_PLTOFF16:
1541 case R_390_PLTOFF32:
1542 if (h != NULL)
1543 {
1544 if (h->plt.refcount > 0)
1545 h->plt.refcount -= 1;
1546 }
1547 break;
1548
1549 case R_390_GOTPLT12:
1550 case R_390_GOTPLT16:
1551 case R_390_GOTPLT20:
1552 case R_390_GOTPLT32:
1553 case R_390_GOTPLTENT:
1554 if (h != NULL)
1555 {
1556 if (h->plt.refcount > 0)
1557 {
1558 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1559 h->plt.refcount -= 1;
1560 }
1561 }
1562 else if (local_got_refcounts != NULL)
1563 {
1564 if (local_got_refcounts[r_symndx] > 0)
1565 local_got_refcounts[r_symndx] -= 1;
1566 }
1567 break;
1568
1569 default:
1570 break;
1571 }
1572 }
1573
1574 return TRUE;
1575 }
1576
1577 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1578 entry but we found we will not create any. Called when we find we will
1579 not have any PLT for this symbol, by for example
1580 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1581 or elf_s390_size_dynamic_sections if no dynamic sections will be
1582 created (we're only linking static objects). */
1583
1584 static void
1585 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1586 {
1587 if (h->elf.root.type == bfd_link_hash_warning)
1588 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1589
1590 if (h->gotplt_refcount <= 0)
1591 return;
1592
1593 /* We simply add the number of gotplt references to the number
1594 * of got references for this symbol. */
1595 h->elf.got.refcount += h->gotplt_refcount;
1596 h->gotplt_refcount = -1;
1597 }
1598
1599 /* Adjust a symbol defined by a dynamic object and referenced by a
1600 regular object. The current definition is in some section of the
1601 dynamic object, but we're not including those sections. We have to
1602 change the definition to something the rest of the link can
1603 understand. */
1604
1605 static bfd_boolean
1606 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1607 struct elf_link_hash_entry *h)
1608 {
1609 struct elf_s390_link_hash_table *htab;
1610 asection *s, *srel;
1611
1612 /* STT_GNU_IFUNC symbol must go through PLT. */
1613 if (s390_is_ifunc_symbol_p (h))
1614 {
1615 /* All local STT_GNU_IFUNC references must be treated as local
1616 calls via local PLT. */
1617 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1618 {
1619 bfd_size_type pc_count = 0, count = 0;
1620 struct elf_dyn_relocs **pp;
1621 struct elf_s390_link_hash_entry *eh;
1622 struct elf_dyn_relocs *p;
1623
1624 eh = (struct elf_s390_link_hash_entry *) h;
1625 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1626 {
1627 pc_count += p->pc_count;
1628 p->count -= p->pc_count;
1629 p->pc_count = 0;
1630 count += p->count;
1631 if (p->count == 0)
1632 *pp = p->next;
1633 else
1634 pp = &p->next;
1635 }
1636
1637 if (pc_count || count)
1638 {
1639 h->needs_plt = 1;
1640 h->non_got_ref = 1;
1641 if (h->plt.refcount <= 0)
1642 h->plt.refcount = 1;
1643 else
1644 h->plt.refcount += 1;
1645 }
1646 }
1647
1648 if (h->plt.refcount <= 0)
1649 {
1650 h->plt.offset = (bfd_vma) -1;
1651 h->needs_plt = 0;
1652 }
1653 return TRUE;
1654 }
1655
1656 /* If this is a function, put it in the procedure linkage table. We
1657 will fill in the contents of the procedure linkage table later
1658 (although we could actually do it here). */
1659 if (h->type == STT_FUNC
1660 || h->needs_plt)
1661 {
1662 if (h->plt.refcount <= 0
1663 || SYMBOL_CALLS_LOCAL (info, h)
1664 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1665 && h->root.type != bfd_link_hash_undefweak))
1666 {
1667 /* This case can occur if we saw a PLT32 reloc in an input
1668 file, but the symbol was never referred to by a dynamic
1669 object, or if all references were garbage collected. In
1670 such a case, we don't actually need to build a procedure
1671 linkage table, and we can just do a PC32 reloc instead. */
1672 h->plt.offset = (bfd_vma) -1;
1673 h->needs_plt = 0;
1674 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1675 }
1676
1677 return TRUE;
1678 }
1679 else
1680 /* It's possible that we incorrectly decided a .plt reloc was
1681 needed for an R_390_PC32 reloc to a non-function sym in
1682 check_relocs. We can't decide accurately between function and
1683 non-function syms in check-relocs; Objects loaded later in
1684 the link may change h->type. So fix it now. */
1685 h->plt.offset = (bfd_vma) -1;
1686
1687 /* If this is a weak symbol, and there is a real definition, the
1688 processor independent code will have arranged for us to see the
1689 real definition first, and we can just use the same value. */
1690 if (h->u.weakdef != NULL)
1691 {
1692 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1693 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1694 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1695 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1696 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1697 h->non_got_ref = h->u.weakdef->non_got_ref;
1698 return TRUE;
1699 }
1700
1701 /* This is a reference to a symbol defined by a dynamic object which
1702 is not a function. */
1703
1704 /* If we are creating a shared library, we must presume that the
1705 only references to the symbol are via the global offset table.
1706 For such cases we need not do anything here; the relocations will
1707 be handled correctly by relocate_section. */
1708 if (bfd_link_pic (info))
1709 return TRUE;
1710
1711 /* If there are no references to this symbol that do not use the
1712 GOT, we don't need to generate a copy reloc. */
1713 if (!h->non_got_ref)
1714 return TRUE;
1715
1716 /* If -z nocopyreloc was given, we won't generate them either. */
1717 if (info->nocopyreloc)
1718 {
1719 h->non_got_ref = 0;
1720 return TRUE;
1721 }
1722
1723 if (ELIMINATE_COPY_RELOCS)
1724 {
1725 struct elf_s390_link_hash_entry * eh;
1726 struct elf_dyn_relocs *p;
1727
1728 eh = (struct elf_s390_link_hash_entry *) h;
1729 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1730 {
1731 s = p->sec->output_section;
1732 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1733 break;
1734 }
1735
1736 /* If we didn't find any dynamic relocs in read-only sections, then
1737 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1738 if (p == NULL)
1739 {
1740 h->non_got_ref = 0;
1741 return TRUE;
1742 }
1743 }
1744
1745 /* We must allocate the symbol in our .dynbss section, which will
1746 become part of the .bss section of the executable. There will be
1747 an entry for this symbol in the .dynsym section. The dynamic
1748 object will contain position independent code, so all references
1749 from the dynamic object to this symbol will go through the global
1750 offset table. The dynamic linker will use the .dynsym entry to
1751 determine the address it must put in the global offset table, so
1752 both the dynamic object and the regular object will refer to the
1753 same memory location for the variable. */
1754
1755 htab = elf_s390_hash_table (info);
1756
1757 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1758 copy the initial value out of the dynamic object and into the
1759 runtime process image. */
1760 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1761 {
1762 s = htab->elf.sdynrelro;
1763 srel = htab->elf.sreldynrelro;
1764 }
1765 else
1766 {
1767 s = htab->elf.sdynbss;
1768 srel = htab->elf.srelbss;
1769 }
1770 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1771 {
1772 srel->size += sizeof (Elf32_External_Rela);
1773 h->needs_copy = 1;
1774 }
1775
1776 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1777 }
1778
1779 /* Allocate space in .plt, .got and associated reloc sections for
1780 dynamic relocs. */
1781
1782 static bfd_boolean
1783 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1784 {
1785 struct bfd_link_info *info;
1786 struct elf_s390_link_hash_table *htab;
1787 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1788 struct elf_dyn_relocs *p;
1789
1790 if (h->root.type == bfd_link_hash_indirect)
1791 return TRUE;
1792
1793 info = (struct bfd_link_info *) inf;
1794 htab = elf_s390_hash_table (info);
1795
1796 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1797 here if it is defined and referenced in a non-shared object. */
1798 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1799 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1800 else if (htab->elf.dynamic_sections_created
1801 && h->plt.refcount > 0)
1802 {
1803 /* Make sure this symbol is output as a dynamic symbol.
1804 Undefined weak syms won't yet be marked as dynamic. */
1805 if (h->dynindx == -1
1806 && !h->forced_local)
1807 {
1808 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1809 return FALSE;
1810 }
1811
1812 if (bfd_link_pic (info)
1813 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1814 {
1815 asection *s = htab->elf.splt;
1816
1817 /* If this is the first .plt entry, make room for the special
1818 first entry. */
1819 if (s->size == 0)
1820 s->size += PLT_FIRST_ENTRY_SIZE;
1821
1822 h->plt.offset = s->size;
1823
1824 /* If this symbol is not defined in a regular file, and we are
1825 not generating a shared library, then set the symbol to this
1826 location in the .plt. This is required to make function
1827 pointers compare as equal between the normal executable and
1828 the shared library. */
1829 if (! bfd_link_pic (info)
1830 && !h->def_regular)
1831 {
1832 h->root.u.def.section = s;
1833 h->root.u.def.value = h->plt.offset;
1834 }
1835
1836 /* Make room for this entry. */
1837 s->size += PLT_ENTRY_SIZE;
1838
1839 /* We also need to make an entry in the .got.plt section, which
1840 will be placed in the .got section by the linker script. */
1841 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1842
1843 /* We also need to make an entry in the .rela.plt section. */
1844 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1845 }
1846 else
1847 {
1848 h->plt.offset = (bfd_vma) -1;
1849 h->needs_plt = 0;
1850 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1851 }
1852 }
1853 else
1854 {
1855 h->plt.offset = (bfd_vma) -1;
1856 h->needs_plt = 0;
1857 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1858 }
1859
1860 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1861 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1862 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1863 we can save the dynamic TLS relocation. */
1864 if (h->got.refcount > 0
1865 && !bfd_link_pic (info)
1866 && h->dynindx == -1
1867 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1868 {
1869 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1870 /* For the GOTIE access without a literal pool entry the offset has
1871 to be stored somewhere. The immediate value in the instruction
1872 is not bit enough so the value is stored in the got. */
1873 {
1874 h->got.offset = htab->elf.sgot->size;
1875 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1876 }
1877 else
1878 h->got.offset = (bfd_vma) -1;
1879 }
1880 else if (h->got.refcount > 0)
1881 {
1882 asection *s;
1883 bfd_boolean dyn;
1884 int tls_type = elf_s390_hash_entry(h)->tls_type;
1885
1886 /* Make sure this symbol is output as a dynamic symbol.
1887 Undefined weak syms won't yet be marked as dynamic. */
1888 if (h->dynindx == -1
1889 && !h->forced_local)
1890 {
1891 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1892 return FALSE;
1893 }
1894
1895 s = htab->elf.sgot;
1896 h->got.offset = s->size;
1897 s->size += GOT_ENTRY_SIZE;
1898 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1899 if (tls_type == GOT_TLS_GD)
1900 s->size += GOT_ENTRY_SIZE;
1901 dyn = htab->elf.dynamic_sections_created;
1902 /* R_390_TLS_IE32 needs one dynamic relocation,
1903 R_390_TLS_GD32 needs one if local symbol and two if global. */
1904 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1905 || tls_type >= GOT_TLS_IE)
1906 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1907 else if (tls_type == GOT_TLS_GD)
1908 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1909 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1910 || h->root.type != bfd_link_hash_undefweak)
1911 && (bfd_link_pic (info)
1912 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1913 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1914 }
1915 else
1916 h->got.offset = (bfd_vma) -1;
1917
1918 if (eh->dyn_relocs == NULL)
1919 return TRUE;
1920
1921 /* In the shared -Bsymbolic case, discard space allocated for
1922 dynamic pc-relative relocs against symbols which turn out to be
1923 defined in regular objects. For the normal shared case, discard
1924 space for pc-relative relocs that have become local due to symbol
1925 visibility changes. */
1926
1927 if (bfd_link_pic (info))
1928 {
1929 if (SYMBOL_CALLS_LOCAL (info, h))
1930 {
1931 struct elf_dyn_relocs **pp;
1932
1933 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1934 {
1935 p->count -= p->pc_count;
1936 p->pc_count = 0;
1937 if (p->count == 0)
1938 *pp = p->next;
1939 else
1940 pp = &p->next;
1941 }
1942 }
1943
1944 /* Also discard relocs on undefined weak syms with non-default
1945 visibility. */
1946 if (eh->dyn_relocs != NULL
1947 && h->root.type == bfd_link_hash_undefweak)
1948 {
1949 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1950 eh->dyn_relocs = NULL;
1951
1952 /* Make sure undefined weak symbols are output as a dynamic
1953 symbol in PIEs. */
1954 else if (h->dynindx == -1
1955 && !h->forced_local)
1956 {
1957 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1958 return FALSE;
1959 }
1960 }
1961 }
1962 else if (ELIMINATE_COPY_RELOCS)
1963 {
1964 /* For the non-shared case, discard space for relocs against
1965 symbols which turn out to need copy relocs or are not
1966 dynamic. */
1967
1968 if (!h->non_got_ref
1969 && ((h->def_dynamic
1970 && !h->def_regular)
1971 || (htab->elf.dynamic_sections_created
1972 && (h->root.type == bfd_link_hash_undefweak
1973 || h->root.type == bfd_link_hash_undefined))))
1974 {
1975 /* Make sure this symbol is output as a dynamic symbol.
1976 Undefined weak syms won't yet be marked as dynamic. */
1977 if (h->dynindx == -1
1978 && !h->forced_local)
1979 {
1980 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1981 return FALSE;
1982 }
1983
1984 /* If that succeeded, we know we'll be keeping all the
1985 relocs. */
1986 if (h->dynindx != -1)
1987 goto keep;
1988 }
1989
1990 eh->dyn_relocs = NULL;
1991
1992 keep: ;
1993 }
1994
1995 /* Finally, allocate space. */
1996 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1997 {
1998 asection *sreloc = elf_section_data (p->sec)->sreloc;
1999
2000 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2001 }
2002
2003 return TRUE;
2004 }
2005
2006 /* Find any dynamic relocs that apply to read-only sections. */
2007
2008 static bfd_boolean
2009 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2010 {
2011 struct elf_s390_link_hash_entry *eh;
2012 struct elf_dyn_relocs *p;
2013
2014 eh = (struct elf_s390_link_hash_entry *) h;
2015 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2016 {
2017 asection *s = p->sec->output_section;
2018
2019 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2020 {
2021 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2022
2023 info->flags |= DF_TEXTREL;
2024
2025 /* Not an error, just cut short the traversal. */
2026 return FALSE;
2027 }
2028 }
2029 return TRUE;
2030 }
2031
2032 /* Set the sizes of the dynamic sections. */
2033
2034 static bfd_boolean
2035 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2036 struct bfd_link_info *info)
2037 {
2038 struct elf_s390_link_hash_table *htab;
2039 bfd *dynobj;
2040 asection *s;
2041 bfd_boolean relocs;
2042 bfd *ibfd;
2043
2044 htab = elf_s390_hash_table (info);
2045 dynobj = htab->elf.dynobj;
2046 if (dynobj == NULL)
2047 abort ();
2048
2049 if (htab->elf.dynamic_sections_created)
2050 {
2051 /* Set the contents of the .interp section to the interpreter. */
2052 if (bfd_link_executable (info) && !info->nointerp)
2053 {
2054 s = bfd_get_linker_section (dynobj, ".interp");
2055 if (s == NULL)
2056 abort ();
2057 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2058 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2059 }
2060 }
2061
2062 /* Set up .got offsets for local syms, and space for local dynamic
2063 relocs. */
2064 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2065 {
2066 bfd_signed_vma *local_got;
2067 bfd_signed_vma *end_local_got;
2068 char *local_tls_type;
2069 bfd_size_type locsymcount;
2070 Elf_Internal_Shdr *symtab_hdr;
2071 asection *srela;
2072 struct plt_entry *local_plt;
2073 unsigned int i;
2074
2075 if (! is_s390_elf (ibfd))
2076 continue;
2077
2078 for (s = ibfd->sections; s != NULL; s = s->next)
2079 {
2080 struct elf_dyn_relocs *p;
2081
2082 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2083 {
2084 if (!bfd_is_abs_section (p->sec)
2085 && bfd_is_abs_section (p->sec->output_section))
2086 {
2087 /* Input section has been discarded, either because
2088 it is a copy of a linkonce section or due to
2089 linker script /DISCARD/, so we'll be discarding
2090 the relocs too. */
2091 }
2092 else if (p->count != 0)
2093 {
2094 srela = elf_section_data (p->sec)->sreloc;
2095 srela->size += p->count * sizeof (Elf32_External_Rela);
2096 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2097 info->flags |= DF_TEXTREL;
2098 }
2099 }
2100 }
2101
2102 local_got = elf_local_got_refcounts (ibfd);
2103 if (!local_got)
2104 continue;
2105
2106 symtab_hdr = &elf_symtab_hdr (ibfd);
2107 locsymcount = symtab_hdr->sh_info;
2108 end_local_got = local_got + locsymcount;
2109 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2110 s = htab->elf.sgot;
2111 srela = htab->elf.srelgot;
2112 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2113 {
2114 if (*local_got > 0)
2115 {
2116 *local_got = s->size;
2117 s->size += GOT_ENTRY_SIZE;
2118 if (*local_tls_type == GOT_TLS_GD)
2119 s->size += GOT_ENTRY_SIZE;
2120 if (bfd_link_pic (info))
2121 srela->size += sizeof (Elf32_External_Rela);
2122 }
2123 else
2124 *local_got = (bfd_vma) -1;
2125 }
2126 local_plt = elf_s390_local_plt (ibfd);
2127 for (i = 0; i < symtab_hdr->sh_info; i++)
2128 {
2129 if (local_plt[i].plt.refcount > 0)
2130 {
2131 local_plt[i].plt.offset = htab->elf.iplt->size;
2132 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2133 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2134 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2135 }
2136 else
2137 local_plt[i].plt.offset = (bfd_vma) -1;
2138 }
2139 }
2140
2141 if (htab->tls_ldm_got.refcount > 0)
2142 {
2143 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2144 relocs. */
2145 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2146 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2147 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2148 }
2149 else
2150 htab->tls_ldm_got.offset = -1;
2151
2152 /* Allocate global sym .plt and .got entries, and space for global
2153 sym dynamic relocs. */
2154 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2155
2156 /* We now have determined the sizes of the various dynamic sections.
2157 Allocate memory for them. */
2158 relocs = FALSE;
2159 for (s = dynobj->sections; s != NULL; s = s->next)
2160 {
2161 if ((s->flags & SEC_LINKER_CREATED) == 0)
2162 continue;
2163
2164 if (s == htab->elf.splt
2165 || s == htab->elf.sgot
2166 || s == htab->elf.sgotplt
2167 || s == htab->elf.sdynbss
2168 || s == htab->elf.sdynrelro
2169 || s == htab->elf.iplt
2170 || s == htab->elf.igotplt
2171 || s == htab->irelifunc)
2172 {
2173 /* Strip this section if we don't need it; see the
2174 comment below. */
2175 }
2176 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2177 {
2178 if (s->size != 0)
2179 relocs = TRUE;
2180
2181 /* We use the reloc_count field as a counter if we need
2182 to copy relocs into the output file. */
2183 s->reloc_count = 0;
2184 }
2185 else
2186 {
2187 /* It's not one of our sections, so don't allocate space. */
2188 continue;
2189 }
2190
2191 if (s->size == 0)
2192 {
2193 /* If we don't need this section, strip it from the
2194 output file. This is to handle .rela.bss and
2195 .rela.plt. We must create it in
2196 create_dynamic_sections, because it must be created
2197 before the linker maps input sections to output
2198 sections. The linker does that before
2199 adjust_dynamic_symbol is called, and it is that
2200 function which decides whether anything needs to go
2201 into these sections. */
2202
2203 s->flags |= SEC_EXCLUDE;
2204 continue;
2205 }
2206
2207 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2208 continue;
2209
2210 /* Allocate memory for the section contents. We use bfd_zalloc
2211 here in case unused entries are not reclaimed before the
2212 section's contents are written out. This should not happen,
2213 but this way if it does, we get a R_390_NONE reloc instead
2214 of garbage. */
2215 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2216 if (s->contents == NULL)
2217 return FALSE;
2218 }
2219
2220 if (htab->elf.dynamic_sections_created)
2221 {
2222 /* Add some entries to the .dynamic section. We fill in the
2223 values later, in elf_s390_finish_dynamic_sections, but we
2224 must add the entries now so that we get the correct size for
2225 the .dynamic section. The DT_DEBUG entry is filled in by the
2226 dynamic linker and used by the debugger. */
2227 #define add_dynamic_entry(TAG, VAL) \
2228 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2229
2230 if (bfd_link_executable (info))
2231 {
2232 if (!add_dynamic_entry (DT_DEBUG, 0))
2233 return FALSE;
2234 }
2235
2236 if (htab->elf.splt->size != 0)
2237 {
2238 if (!add_dynamic_entry (DT_PLTGOT, 0)
2239 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2240 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2241 || !add_dynamic_entry (DT_JMPREL, 0))
2242 return FALSE;
2243 }
2244
2245 if (relocs)
2246 {
2247 if (!add_dynamic_entry (DT_RELA, 0)
2248 || !add_dynamic_entry (DT_RELASZ, 0)
2249 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2250 return FALSE;
2251
2252 /* If any dynamic relocs apply to a read-only section,
2253 then we need a DT_TEXTREL entry. */
2254 if ((info->flags & DF_TEXTREL) == 0)
2255 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2256
2257 if ((info->flags & DF_TEXTREL) != 0)
2258 {
2259 if (!add_dynamic_entry (DT_TEXTREL, 0))
2260 return FALSE;
2261 }
2262 }
2263 }
2264 #undef add_dynamic_entry
2265
2266 return TRUE;
2267 }
2268
2269 /* Return the base VMA address which should be subtracted from real addresses
2270 when resolving @dtpoff relocation.
2271 This is PT_TLS segment p_vaddr. */
2272
2273 static bfd_vma
2274 dtpoff_base (struct bfd_link_info *info)
2275 {
2276 /* If tls_sec is NULL, we should have signalled an error already. */
2277 if (elf_hash_table (info)->tls_sec == NULL)
2278 return 0;
2279 return elf_hash_table (info)->tls_sec->vma;
2280 }
2281
2282 /* Return the relocation value for @tpoff relocation
2283 if STT_TLS virtual address is ADDRESS. */
2284
2285 static bfd_vma
2286 tpoff (struct bfd_link_info *info, bfd_vma address)
2287 {
2288 struct elf_link_hash_table *htab = elf_hash_table (info);
2289
2290 /* If tls_sec is NULL, we should have signalled an error already. */
2291 if (htab->tls_sec == NULL)
2292 return 0;
2293 return htab->tls_size + htab->tls_sec->vma - address;
2294 }
2295
2296 /* Complain if TLS instruction relocation is against an invalid
2297 instruction. */
2298
2299 static void
2300 invalid_tls_insn (bfd *input_bfd,
2301 asection *input_section,
2302 Elf_Internal_Rela *rel)
2303 {
2304 reloc_howto_type *howto;
2305
2306 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2307 _bfd_error_handler
2308 /* xgettext:c-format */
2309 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2310 input_bfd,
2311 input_section,
2312 (long) rel->r_offset,
2313 howto->name);
2314 bfd_set_error (bfd_error_bad_value);
2315 }
2316
2317 /* Relocate a 390 ELF section. */
2318
2319 static bfd_boolean
2320 elf_s390_relocate_section (bfd *output_bfd,
2321 struct bfd_link_info *info,
2322 bfd *input_bfd,
2323 asection *input_section,
2324 bfd_byte *contents,
2325 Elf_Internal_Rela *relocs,
2326 Elf_Internal_Sym *local_syms,
2327 asection **local_sections)
2328 {
2329 struct elf_s390_link_hash_table *htab;
2330 Elf_Internal_Shdr *symtab_hdr;
2331 struct elf_link_hash_entry **sym_hashes;
2332 bfd_vma *local_got_offsets;
2333 Elf_Internal_Rela *rel;
2334 Elf_Internal_Rela *relend;
2335
2336 BFD_ASSERT (is_s390_elf (input_bfd));
2337
2338 htab = elf_s390_hash_table (info);
2339 symtab_hdr = &elf_symtab_hdr (input_bfd);
2340 sym_hashes = elf_sym_hashes (input_bfd);
2341 local_got_offsets = elf_local_got_offsets (input_bfd);
2342
2343 rel = relocs;
2344 relend = relocs + input_section->reloc_count;
2345 for (; rel < relend; rel++)
2346 {
2347 unsigned int r_type;
2348 reloc_howto_type *howto;
2349 unsigned long r_symndx;
2350 struct elf_link_hash_entry *h;
2351 Elf_Internal_Sym *sym;
2352 asection *sec;
2353 bfd_vma off;
2354 bfd_vma relocation;
2355 bfd_boolean unresolved_reloc;
2356 bfd_reloc_status_type r;
2357 int tls_type;
2358 asection *base_got = htab->elf.sgot;
2359
2360 r_type = ELF32_R_TYPE (rel->r_info);
2361 if (r_type == (int) R_390_GNU_VTINHERIT
2362 || r_type == (int) R_390_GNU_VTENTRY)
2363 continue;
2364 if (r_type >= (int) R_390_max)
2365 {
2366 bfd_set_error (bfd_error_bad_value);
2367 return FALSE;
2368 }
2369
2370 howto = elf_howto_table + r_type;
2371 r_symndx = ELF32_R_SYM (rel->r_info);
2372
2373 h = NULL;
2374 sym = NULL;
2375 sec = NULL;
2376 unresolved_reloc = FALSE;
2377 if (r_symndx < symtab_hdr->sh_info)
2378 {
2379 sym = local_syms + r_symndx;
2380 sec = local_sections[r_symndx];
2381 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2382 {
2383 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2384 if (local_plt == NULL)
2385 return FALSE;
2386
2387 /* Address of the PLT slot. */
2388 relocation = (htab->elf.iplt->output_section->vma
2389 + htab->elf.iplt->output_offset
2390 + local_plt[r_symndx].plt.offset);
2391
2392 switch (r_type)
2393 {
2394 case R_390_PLTOFF16:
2395 case R_390_PLTOFF32:
2396 relocation -= htab->elf.sgot->output_section->vma;
2397 break;
2398 case R_390_GOTPLT12:
2399 case R_390_GOTPLT16:
2400 case R_390_GOTPLT20:
2401 case R_390_GOTPLT32:
2402 case R_390_GOTPLTENT:
2403 case R_390_GOT12:
2404 case R_390_GOT16:
2405 case R_390_GOT20:
2406 case R_390_GOT32:
2407 case R_390_GOTENT:
2408 {
2409 /* Write the PLT slot address into the GOT slot. */
2410 bfd_put_32 (output_bfd, relocation,
2411 htab->elf.sgot->contents +
2412 local_got_offsets[r_symndx]);
2413 relocation = (local_got_offsets[r_symndx] +
2414 htab->elf.sgot->output_offset);
2415
2416 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2417 relocation += htab->elf.sgot->output_section->vma;
2418 break;
2419 }
2420 default:
2421 break;
2422 }
2423 /* The output section is needed later in
2424 finish_dynamic_section when creating the dynamic
2425 relocation. */
2426 local_plt[r_symndx].sec = sec;
2427 goto do_relocation;
2428 }
2429 else
2430 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2431 }
2432 else
2433 {
2434 bfd_boolean warned ATTRIBUTE_UNUSED;
2435 bfd_boolean ignored ATTRIBUTE_UNUSED;
2436
2437 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2438 r_symndx, symtab_hdr, sym_hashes,
2439 h, sec, relocation,
2440 unresolved_reloc, warned, ignored);
2441 }
2442
2443 if (sec != NULL && discarded_section (sec))
2444 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2445 rel, 1, relend, howto, 0, contents);
2446
2447 if (bfd_link_relocatable (info))
2448 continue;
2449
2450 switch (r_type)
2451 {
2452 case R_390_GOTPLT12:
2453 case R_390_GOTPLT16:
2454 case R_390_GOTPLT20:
2455 case R_390_GOTPLT32:
2456 case R_390_GOTPLTENT:
2457 /* There are three cases for a GOTPLT relocation. 1) The
2458 relocation is against the jump slot entry of a plt that
2459 will get emitted to the output file. 2) The relocation
2460 is against the jump slot of a plt entry that has been
2461 removed. elf_s390_adjust_gotplt has created a GOT entry
2462 as replacement. 3) The relocation is against a local symbol.
2463 Cases 2) and 3) are the same as the GOT relocation code
2464 so we just have to test for case 1 and fall through for
2465 the other two. */
2466 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2467 {
2468 bfd_vma plt_index;
2469
2470 if (s390_is_ifunc_symbol_p (h))
2471 {
2472 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2473 relocation = (plt_index * GOT_ENTRY_SIZE +
2474 htab->elf.igotplt->output_offset);
2475 if (r_type == R_390_GOTPLTENT)
2476 relocation += htab->elf.igotplt->output_section->vma;
2477 }
2478 else
2479 {
2480 /* Calc. index no.
2481 Current offset - size first entry / entry size. */
2482 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2483 PLT_ENTRY_SIZE;
2484
2485 /* Offset in GOT is PLT index plus GOT headers(3)
2486 times 4, addr & GOT addr. */
2487 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2488 if (r_type == R_390_GOTPLTENT)
2489 relocation += htab->elf.sgot->output_section->vma;
2490 }
2491 unresolved_reloc = FALSE;
2492
2493 }
2494 /* Fall through. */
2495
2496 case R_390_GOT12:
2497 case R_390_GOT16:
2498 case R_390_GOT20:
2499 case R_390_GOT32:
2500 case R_390_GOTENT:
2501 /* Relocation is to the entry for this symbol in the global
2502 offset table. */
2503 if (base_got == NULL)
2504 abort ();
2505
2506 if (h != NULL)
2507 {
2508 bfd_boolean dyn;
2509
2510 off = h->got.offset;
2511 dyn = htab->elf.dynamic_sections_created;
2512
2513 if (s390_is_ifunc_symbol_p (h))
2514 {
2515 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2516 if (off == (bfd_vma)-1)
2517 {
2518 /* No explicit GOT usage so redirect to the
2519 got.iplt slot. */
2520 base_got = htab->elf.igotplt;
2521 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2522 }
2523 else
2524 {
2525 /* Explicit GOT slots must contain the address
2526 of the PLT slot. This will be handled in
2527 finish_dynamic_symbol. */
2528 }
2529 }
2530 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2531 bfd_link_pic (info),
2532 h)
2533 || (bfd_link_pic (info)
2534 && SYMBOL_REFERENCES_LOCAL (info, h))
2535 || (ELF_ST_VISIBILITY (h->other)
2536 && h->root.type == bfd_link_hash_undefweak))
2537
2538 {
2539 /* This is actually a static link, or it is a
2540 -Bsymbolic link and the symbol is defined
2541 locally, or the symbol was forced to be local
2542 because of a version file. We must initialize
2543 this entry in the global offset table. Since the
2544 offset must always be a multiple of 2, we use the
2545 least significant bit to record whether we have
2546 initialized it already.
2547
2548 When doing a dynamic link, we create a .rel.got
2549 relocation entry to initialize the value. This
2550 is done in the finish_dynamic_symbol routine. */
2551 if ((off & 1) != 0)
2552 off &= ~1;
2553 else
2554 {
2555 bfd_put_32 (output_bfd, relocation,
2556 base_got->contents + off);
2557 h->got.offset |= 1;
2558 }
2559
2560 if ((h->def_regular
2561 && bfd_link_pic (info)
2562 && SYMBOL_REFERENCES_LOCAL (info, h))
2563 /* lrl rx,sym@GOTENT -> larl rx, sym */
2564 && ((r_type == R_390_GOTENT
2565 && (bfd_get_16 (input_bfd,
2566 contents + rel->r_offset - 2)
2567 & 0xff0f) == 0xc40d)
2568 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2569 || (r_type == R_390_GOT20
2570 && (bfd_get_32 (input_bfd,
2571 contents + rel->r_offset - 2)
2572 & 0xff00f000) == 0xe300c000
2573 && bfd_get_8 (input_bfd,
2574 contents + rel->r_offset + 3) == 0x58)))
2575 {
2576 unsigned short new_insn =
2577 (0xc000 | (bfd_get_8 (input_bfd,
2578 contents + rel->r_offset - 1) & 0xf0));
2579 bfd_put_16 (output_bfd, new_insn,
2580 contents + rel->r_offset - 2);
2581 r_type = R_390_PC32DBL;
2582 rel->r_addend = 2;
2583 howto = elf_howto_table + r_type;
2584 relocation = h->root.u.def.value
2585 + h->root.u.def.section->output_section->vma
2586 + h->root.u.def.section->output_offset;
2587 goto do_relocation;
2588 }
2589 }
2590 else
2591 unresolved_reloc = FALSE;
2592 }
2593 else
2594 {
2595 if (local_got_offsets == NULL)
2596 abort ();
2597
2598 off = local_got_offsets[r_symndx];
2599
2600 /* The offset must always be a multiple of 4. We use
2601 the least significant bit to record whether we have
2602 already generated the necessary reloc. */
2603 if ((off & 1) != 0)
2604 off &= ~1;
2605 else
2606 {
2607 bfd_put_32 (output_bfd, relocation,
2608 htab->elf.sgot->contents + off);
2609
2610 if (bfd_link_pic (info))
2611 {
2612 asection *srelgot;
2613 Elf_Internal_Rela outrel;
2614 bfd_byte *loc;
2615
2616 srelgot = htab->elf.srelgot;
2617 if (srelgot == NULL)
2618 abort ();
2619
2620 outrel.r_offset = (htab->elf.sgot->output_section->vma
2621 + htab->elf.sgot->output_offset
2622 + off);
2623 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2624 outrel.r_addend = relocation;
2625 loc = srelgot->contents;
2626 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2627 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2628 }
2629
2630 local_got_offsets[r_symndx] |= 1;
2631 }
2632 }
2633
2634 if (off >= (bfd_vma) -2)
2635 abort ();
2636
2637 relocation = base_got->output_offset + off;
2638
2639 /* For @GOTENT the relocation is against the offset between
2640 the instruction and the symbols entry in the GOT and not
2641 between the start of the GOT and the symbols entry. We
2642 add the vma of the GOT to get the correct value. */
2643 if ( r_type == R_390_GOTENT
2644 || r_type == R_390_GOTPLTENT)
2645 relocation += base_got->output_section->vma;
2646
2647 break;
2648
2649 case R_390_GOTOFF16:
2650 case R_390_GOTOFF32:
2651 /* Relocation is relative to the start of the global offset
2652 table. */
2653
2654 if (h != NULL
2655 && s390_is_ifunc_symbol_p (h)
2656 && h->def_regular
2657 && !bfd_link_executable (info))
2658 {
2659 relocation = (htab->elf.iplt->output_section->vma
2660 + htab->elf.iplt->output_offset
2661 + h->plt.offset
2662 - htab->elf.sgot->output_section->vma);
2663 goto do_relocation;
2664 }
2665
2666 /* Note that sgot->output_offset is not involved in this
2667 calculation. We always want the start of .got. If we
2668 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2669 permitted by the ABI, we might have to change this
2670 calculation. */
2671 relocation -= htab->elf.sgot->output_section->vma;
2672 break;
2673
2674 case R_390_GOTPC:
2675 case R_390_GOTPCDBL:
2676 /* Use global offset table as symbol value. */
2677 relocation = htab->elf.sgot->output_section->vma;
2678 unresolved_reloc = FALSE;
2679 break;
2680
2681 case R_390_PLT12DBL:
2682 case R_390_PLT16DBL:
2683 case R_390_PLT24DBL:
2684 case R_390_PLT32DBL:
2685 case R_390_PLT32:
2686 /* Relocation is to the entry for this symbol in the
2687 procedure linkage table. */
2688
2689 /* Resolve a PLT32 reloc against a local symbol directly,
2690 without using the procedure linkage table. */
2691 if (h == NULL)
2692 break;
2693
2694 if (h->plt.offset == (bfd_vma) -1
2695 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2696 {
2697 /* We didn't make a PLT entry for this symbol. This
2698 happens when statically linking PIC code, or when
2699 using -Bsymbolic. */
2700 break;
2701 }
2702
2703 if (s390_is_ifunc_symbol_p (h))
2704 relocation = (htab->elf.iplt->output_section->vma
2705 + htab->elf.iplt->output_offset
2706 + h->plt.offset);
2707 else
2708 relocation = (htab->elf.splt->output_section->vma
2709 + htab->elf.splt->output_offset
2710 + h->plt.offset);
2711 unresolved_reloc = FALSE;
2712 break;
2713
2714 case R_390_PLTOFF16:
2715 case R_390_PLTOFF32:
2716 /* Relocation is to the entry for this symbol in the
2717 procedure linkage table relative to the start of the GOT. */
2718
2719 /* For local symbols or if we didn't make a PLT entry for
2720 this symbol resolve the symbol directly. */
2721 if (h == NULL
2722 || h->plt.offset == (bfd_vma) -1
2723 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2724 {
2725 relocation -= htab->elf.sgot->output_section->vma;
2726 break;
2727 }
2728
2729 if (s390_is_ifunc_symbol_p (h))
2730 relocation = (htab->elf.iplt->output_section->vma
2731 + htab->elf.iplt->output_offset
2732 + h->plt.offset
2733 - htab->elf.sgot->output_section->vma);
2734 else
2735 relocation = (htab->elf.splt->output_section->vma
2736 + htab->elf.splt->output_offset
2737 + h->plt.offset
2738 - htab->elf.sgot->output_section->vma);
2739 unresolved_reloc = FALSE;
2740 break;
2741
2742 case R_390_PC16:
2743 case R_390_PC12DBL:
2744 case R_390_PC16DBL:
2745 case R_390_PC24DBL:
2746 case R_390_PC32DBL:
2747 case R_390_PC32:
2748 if (h != NULL
2749 && s390_is_ifunc_symbol_p (h)
2750 && h->def_regular
2751 && !bfd_link_executable (info))
2752 {
2753 /* This will not work our if the function does not
2754 happen to set up the GOT pointer for some other
2755 reason. 31 bit PLT entries require r12 to hold the
2756 GOT pointer.
2757 FIXME: Implement an errorcheck.
2758 NOTE: It will work when brasl is not available
2759 (e.g. with -m31 -march=g5) since a local function
2760 call then does use GOTOFF which implies r12 being set
2761 up. */
2762 relocation = (htab->elf.iplt->output_section->vma
2763 + htab->elf.iplt->output_offset
2764 + h ->plt.offset);
2765 goto do_relocation;
2766 }
2767 /* Fall through. */
2768
2769 case R_390_8:
2770 case R_390_16:
2771 case R_390_32:
2772 if (h != NULL
2773 && s390_is_ifunc_symbol_p (h)
2774 && h->def_regular)
2775 {
2776 if (!bfd_link_pic (info) || !h->non_got_ref)
2777 {
2778 /* For a non-shared object STT_GNU_IFUNC symbol must
2779 go through PLT. */
2780 relocation = (htab->elf.iplt->output_section->vma
2781 + htab->elf.iplt->output_offset
2782 + h ->plt.offset);
2783 goto do_relocation;
2784 }
2785 else
2786 {
2787 /* For shared objects a runtime relocation is needed. */
2788
2789 Elf_Internal_Rela outrel;
2790 asection *sreloc;
2791
2792 /* Need a dynamic relocation to get the real function
2793 address. */
2794 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2795 info,
2796 input_section,
2797 rel->r_offset);
2798 if (outrel.r_offset == (bfd_vma) -1
2799 || outrel.r_offset == (bfd_vma) -2)
2800 abort ();
2801
2802 outrel.r_offset += (input_section->output_section->vma
2803 + input_section->output_offset);
2804
2805 if (h->dynindx == -1
2806 || h->forced_local
2807 || bfd_link_executable (info))
2808 {
2809 /* This symbol is resolved locally. */
2810 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2811 outrel.r_addend = (h->root.u.def.value
2812 + h->root.u.def.section->output_section->vma
2813 + h->root.u.def.section->output_offset);
2814 }
2815 else
2816 {
2817 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2818 outrel.r_addend = 0;
2819 }
2820
2821 sreloc = htab->elf.irelifunc;
2822 elf_append_rela (output_bfd, sreloc, &outrel);
2823
2824 /* If this reloc is against an external symbol, we
2825 do not want to fiddle with the addend. Otherwise,
2826 we need to include the symbol value so that it
2827 becomes an addend for the dynamic reloc. For an
2828 internal symbol, we have updated addend. */
2829 continue;
2830 }
2831 }
2832
2833 if ((input_section->flags & SEC_ALLOC) == 0)
2834 break;
2835
2836 if ((bfd_link_pic (info)
2837 && (h == NULL
2838 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2839 || h->root.type != bfd_link_hash_undefweak)
2840 && ((r_type != R_390_PC16
2841 && r_type != R_390_PC12DBL
2842 && r_type != R_390_PC16DBL
2843 && r_type != R_390_PC24DBL
2844 && r_type != R_390_PC32DBL
2845 && r_type != R_390_PC32)
2846 || !SYMBOL_CALLS_LOCAL (info, h)))
2847 || (ELIMINATE_COPY_RELOCS
2848 && !bfd_link_pic (info)
2849 && h != NULL
2850 && h->dynindx != -1
2851 && !h->non_got_ref
2852 && ((h->def_dynamic
2853 && !h->def_regular)
2854 || h->root.type == bfd_link_hash_undefweak
2855 || h->root.type == bfd_link_hash_undefined)))
2856 {
2857 Elf_Internal_Rela outrel;
2858 bfd_boolean skip, relocate;
2859 asection *sreloc;
2860 bfd_byte *loc;
2861
2862 /* When generating a shared object, these relocations
2863 are copied into the output file to be resolved at run
2864 time. */
2865
2866 skip = FALSE;
2867 relocate = FALSE;
2868
2869 outrel.r_offset =
2870 _bfd_elf_section_offset (output_bfd, info, input_section,
2871 rel->r_offset);
2872 if (outrel.r_offset == (bfd_vma) -1)
2873 skip = TRUE;
2874 else if (outrel.r_offset == (bfd_vma) -2)
2875 skip = TRUE, relocate = TRUE;
2876 outrel.r_offset += (input_section->output_section->vma
2877 + input_section->output_offset);
2878
2879 if (skip)
2880 memset (&outrel, 0, sizeof outrel);
2881 else if (h != NULL
2882 && h->dynindx != -1
2883 && (r_type == R_390_PC16
2884 || r_type == R_390_PC12DBL
2885 || r_type == R_390_PC16DBL
2886 || r_type == R_390_PC24DBL
2887 || r_type == R_390_PC32DBL
2888 || r_type == R_390_PC32
2889 || !bfd_link_pic (info)
2890 || !SYMBOLIC_BIND (info, h)
2891 || !h->def_regular))
2892 {
2893 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2894 outrel.r_addend = rel->r_addend;
2895 }
2896 else
2897 {
2898 /* This symbol is local, or marked to become local. */
2899 outrel.r_addend = relocation + rel->r_addend;
2900 if (r_type == R_390_32)
2901 {
2902 relocate = TRUE;
2903 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2904 }
2905 else
2906 {
2907 long sindx;
2908
2909 if (bfd_is_abs_section (sec))
2910 sindx = 0;
2911 else if (sec == NULL || sec->owner == NULL)
2912 {
2913 bfd_set_error(bfd_error_bad_value);
2914 return FALSE;
2915 }
2916 else
2917 {
2918 asection *osec;
2919
2920 osec = sec->output_section;
2921 sindx = elf_section_data (osec)->dynindx;
2922 if (sindx == 0)
2923 {
2924 osec = htab->elf.text_index_section;
2925 sindx = elf_section_data (osec)->dynindx;
2926 }
2927 BFD_ASSERT (sindx != 0);
2928
2929 /* We are turning this relocation into one
2930 against a section symbol, so subtract out
2931 the output section's address but not the
2932 offset of the input section in the output
2933 section. */
2934 outrel.r_addend -= osec->vma;
2935 }
2936 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2937 }
2938 }
2939
2940 sreloc = elf_section_data (input_section)->sreloc;
2941 if (sreloc == NULL)
2942 abort ();
2943
2944 loc = sreloc->contents;
2945 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2946 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2947
2948 /* If this reloc is against an external symbol, we do
2949 not want to fiddle with the addend. Otherwise, we
2950 need to include the symbol value so that it becomes
2951 an addend for the dynamic reloc. */
2952 if (! relocate)
2953 continue;
2954 }
2955 break;
2956
2957 /* Relocations for tls literal pool entries. */
2958 case R_390_TLS_IE32:
2959 if (bfd_link_pic (info))
2960 {
2961 Elf_Internal_Rela outrel;
2962 asection *sreloc;
2963 bfd_byte *loc;
2964
2965 outrel.r_offset = rel->r_offset
2966 + input_section->output_section->vma
2967 + input_section->output_offset;
2968 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2969 sreloc = elf_section_data (input_section)->sreloc;
2970 if (sreloc == NULL)
2971 abort ();
2972 loc = sreloc->contents;
2973 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2974 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2975 }
2976 /* Fall through. */
2977
2978 case R_390_TLS_GD32:
2979 case R_390_TLS_GOTIE32:
2980 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2981 tls_type = GOT_UNKNOWN;
2982 if (h == NULL && local_got_offsets)
2983 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2984 else if (h != NULL)
2985 {
2986 tls_type = elf_s390_hash_entry(h)->tls_type;
2987 if (!bfd_link_pic (info)
2988 && h->dynindx == -1
2989 && tls_type >= GOT_TLS_IE)
2990 r_type = R_390_TLS_LE32;
2991 }
2992 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2993 r_type = R_390_TLS_IE32;
2994
2995 if (r_type == R_390_TLS_LE32)
2996 {
2997 /* This relocation gets optimized away by the local exec
2998 access optimization. */
2999 BFD_ASSERT (! unresolved_reloc);
3000 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3001 contents + rel->r_offset);
3002 continue;
3003 }
3004
3005 if (htab->elf.sgot == NULL)
3006 abort ();
3007
3008 if (h != NULL)
3009 off = h->got.offset;
3010 else
3011 {
3012 if (local_got_offsets == NULL)
3013 abort ();
3014
3015 off = local_got_offsets[r_symndx];
3016 }
3017
3018 emit_tls_relocs:
3019
3020 if ((off & 1) != 0)
3021 off &= ~1;
3022 else
3023 {
3024 Elf_Internal_Rela outrel;
3025 bfd_byte *loc;
3026 int dr_type, indx;
3027
3028 if (htab->elf.srelgot == NULL)
3029 abort ();
3030
3031 outrel.r_offset = (htab->elf.sgot->output_section->vma
3032 + htab->elf.sgot->output_offset + off);
3033
3034 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3035 if (r_type == R_390_TLS_GD32)
3036 dr_type = R_390_TLS_DTPMOD;
3037 else
3038 dr_type = R_390_TLS_TPOFF;
3039 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3040 outrel.r_addend = relocation - dtpoff_base (info);
3041 else
3042 outrel.r_addend = 0;
3043 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3044 loc = htab->elf.srelgot->contents;
3045 loc += htab->elf.srelgot->reloc_count++
3046 * sizeof (Elf32_External_Rela);
3047 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3048
3049 if (r_type == R_390_TLS_GD32)
3050 {
3051 if (indx == 0)
3052 {
3053 BFD_ASSERT (! unresolved_reloc);
3054 bfd_put_32 (output_bfd,
3055 relocation - dtpoff_base (info),
3056 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3057 }
3058 else
3059 {
3060 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3061 outrel.r_offset += GOT_ENTRY_SIZE;
3062 outrel.r_addend = 0;
3063 htab->elf.srelgot->reloc_count++;
3064 loc += sizeof (Elf32_External_Rela);
3065 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3066 }
3067 }
3068
3069 if (h != NULL)
3070 h->got.offset |= 1;
3071 else
3072 local_got_offsets[r_symndx] |= 1;
3073 }
3074
3075 if (off >= (bfd_vma) -2)
3076 abort ();
3077 if (r_type == ELF32_R_TYPE (rel->r_info))
3078 {
3079 relocation = htab->elf.sgot->output_offset + off;
3080 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3081 relocation += htab->elf.sgot->output_section->vma;
3082 unresolved_reloc = FALSE;
3083 }
3084 else
3085 {
3086 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3087 contents + rel->r_offset);
3088 continue;
3089 }
3090 break;
3091
3092 case R_390_TLS_GOTIE12:
3093 case R_390_TLS_GOTIE20:
3094 case R_390_TLS_IEENT:
3095 if (h == NULL)
3096 {
3097 if (local_got_offsets == NULL)
3098 abort();
3099 off = local_got_offsets[r_symndx];
3100 if (bfd_link_pic (info))
3101 goto emit_tls_relocs;
3102 }
3103 else
3104 {
3105 off = h->got.offset;
3106 tls_type = elf_s390_hash_entry(h)->tls_type;
3107 if (bfd_link_pic (info)
3108 || h->dynindx != -1
3109 || tls_type < GOT_TLS_IE)
3110 goto emit_tls_relocs;
3111 }
3112
3113 if (htab->elf.sgot == NULL)
3114 abort ();
3115
3116 BFD_ASSERT (! unresolved_reloc);
3117 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3118 htab->elf.sgot->contents + off);
3119 relocation = htab->elf.sgot->output_offset + off;
3120 if (r_type == R_390_TLS_IEENT)
3121 relocation += htab->elf.sgot->output_section->vma;
3122 unresolved_reloc = FALSE;
3123 break;
3124
3125 case R_390_TLS_LDM32:
3126 if (! bfd_link_pic (info))
3127 /* The literal pool entry this relocation refers to gets ignored
3128 by the optimized code of the local exec model. Do nothing
3129 and the value will turn out zero. */
3130 continue;
3131
3132 if (htab->elf.sgot == NULL)
3133 abort ();
3134
3135 off = htab->tls_ldm_got.offset;
3136 if (off & 1)
3137 off &= ~1;
3138 else
3139 {
3140 Elf_Internal_Rela outrel;
3141 bfd_byte *loc;
3142
3143 if (htab->elf.srelgot == NULL)
3144 abort ();
3145
3146 outrel.r_offset = (htab->elf.sgot->output_section->vma
3147 + htab->elf.sgot->output_offset + off);
3148
3149 bfd_put_32 (output_bfd, 0,
3150 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3151 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3152 outrel.r_addend = 0;
3153 loc = htab->elf.srelgot->contents;
3154 loc += htab->elf.srelgot->reloc_count++
3155 * sizeof (Elf32_External_Rela);
3156 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3157 htab->tls_ldm_got.offset |= 1;
3158 }
3159 relocation = htab->elf.sgot->output_offset + off;
3160 unresolved_reloc = FALSE;
3161 break;
3162
3163 case R_390_TLS_LE32:
3164 if (bfd_link_dll (info))
3165 {
3166 /* Linking a shared library with non-fpic code requires
3167 a R_390_TLS_TPOFF relocation. */
3168 Elf_Internal_Rela outrel;
3169 asection *sreloc;
3170 bfd_byte *loc;
3171 int indx;
3172
3173 outrel.r_offset = rel->r_offset
3174 + input_section->output_section->vma
3175 + input_section->output_offset;
3176 if (h != NULL && h->dynindx != -1)
3177 indx = h->dynindx;
3178 else
3179 indx = 0;
3180 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3181 if (indx == 0)
3182 outrel.r_addend = relocation - dtpoff_base (info);
3183 else
3184 outrel.r_addend = 0;
3185 sreloc = elf_section_data (input_section)->sreloc;
3186 if (sreloc == NULL)
3187 abort ();
3188 loc = sreloc->contents;
3189 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3190 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3191 }
3192 else
3193 {
3194 BFD_ASSERT (! unresolved_reloc);
3195 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3196 contents + rel->r_offset);
3197 }
3198 continue;
3199
3200 case R_390_TLS_LDO32:
3201 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3202 relocation -= dtpoff_base (info);
3203 else
3204 /* When converting LDO to LE, we must negate. */
3205 relocation = -tpoff (info, relocation);
3206 break;
3207
3208 /* Relocations for tls instructions. */
3209 case R_390_TLS_LOAD:
3210 case R_390_TLS_GDCALL:
3211 case R_390_TLS_LDCALL:
3212 tls_type = GOT_UNKNOWN;
3213 if (h == NULL && local_got_offsets)
3214 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3215 else if (h != NULL)
3216 tls_type = elf_s390_hash_entry(h)->tls_type;
3217
3218 if (tls_type == GOT_TLS_GD)
3219 continue;
3220
3221 if (r_type == R_390_TLS_LOAD)
3222 {
3223 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3224 {
3225 /* IE->LE transition. Four valid cases:
3226 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3227 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3228 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3229 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3230 unsigned int insn, ry;
3231
3232 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3233 ry = 0;
3234 if ((insn & 0xff00f000) == 0x58000000)
3235 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3236 ry = (insn & 0x000f0000);
3237 else if ((insn & 0xff0f0000) == 0x58000000)
3238 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3239 ry = (insn & 0x0000f000) << 4;
3240 else if ((insn & 0xff00f000) == 0x5800c000)
3241 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3242 ry = (insn & 0x000f0000);
3243 else if ((insn & 0xff0f0000) == 0x580c0000)
3244 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3245 ry = (insn & 0x0000f000) << 4;
3246 else
3247 invalid_tls_insn (input_bfd, input_section, rel);
3248 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3249 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3250 }
3251 }
3252 else if (r_type == R_390_TLS_GDCALL)
3253 {
3254 unsigned int insn;
3255
3256 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3257 if ((insn & 0xff000fff) != 0x4d000000 &&
3258 (insn & 0xffff0000) != 0xc0e50000 &&
3259 (insn & 0xff000000) != 0x0d000000)
3260 invalid_tls_insn (input_bfd, input_section, rel);
3261 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3262 {
3263 if ((insn & 0xff000000) == 0x0d000000)
3264 {
3265 /* GD->LE transition.
3266 basr rx, ry -> nopr r7 */
3267 insn = 0x07070000 | (insn & 0xffff);
3268 }
3269 else if ((insn & 0xff000000) == 0x4d000000)
3270 {
3271 /* GD->LE transition.
3272 bas %r14,0(%rx,%r13) -> bc 0,0 */
3273 insn = 0x47000000;
3274 }
3275 else
3276 {
3277 /* GD->LE transition.
3278 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3279 insn = 0xc0040000;
3280 bfd_put_16 (output_bfd, 0x0000,
3281 contents + rel->r_offset + 4);
3282 }
3283 }
3284 else
3285 {
3286 /* If basr is used in the pic case to invoke
3287 _tls_get_offset, something went wrong before. */
3288 if ((insn & 0xff000000) == 0x0d000000)
3289 invalid_tls_insn (input_bfd, input_section, rel);
3290
3291 if ((insn & 0xff000000) == 0x4d000000)
3292 {
3293 /* GD->IE transition.
3294 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3295 insn = 0x5822c000;
3296 }
3297 else
3298 {
3299 /* GD->IE transition.
3300 brasl %r14,__tls_get_addr@plt ->
3301 l %r2,0(%r2,%r12) ; bcr 0,0 */
3302 insn = 0x5822c000;
3303 bfd_put_16 (output_bfd, 0x0700,
3304 contents + rel->r_offset + 4);
3305 }
3306 }
3307 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3308 }
3309 else if (r_type == R_390_TLS_LDCALL)
3310 {
3311 if (!bfd_link_pic (info))
3312 {
3313 unsigned int insn;
3314
3315 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3316 if ((insn & 0xff000fff) != 0x4d000000 &&
3317 (insn & 0xffff0000) != 0xc0e50000 &&
3318 (insn & 0xff000000) != 0x0d000000)
3319 invalid_tls_insn (input_bfd, input_section, rel);
3320
3321 if ((insn & 0xff000000) == 0x0d000000)
3322 {
3323 /* LD->LE transition.
3324 basr rx, ry -> nopr r7 */
3325 insn = 0x07070000 | (insn & 0xffff);
3326 }
3327 else if ((insn & 0xff000000) == 0x4d000000)
3328 {
3329 /* LD->LE transition.
3330 bas %r14,0(%rx,%r13) -> bc 0,0 */
3331 insn = 0x47000000;
3332 }
3333 else
3334 {
3335 /* LD->LE transition.
3336 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3337 insn = 0xc0040000;
3338 bfd_put_16 (output_bfd, 0x0000,
3339 contents + rel->r_offset + 4);
3340 }
3341 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3342 }
3343 }
3344 continue;
3345
3346 default:
3347 break;
3348 }
3349
3350 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3351 because such sections are not SEC_ALLOC and thus ld.so will
3352 not process them. */
3353 if (unresolved_reloc
3354 && !((input_section->flags & SEC_DEBUGGING) != 0
3355 && h->def_dynamic)
3356 && _bfd_elf_section_offset (output_bfd, info, input_section,
3357 rel->r_offset) != (bfd_vma) -1)
3358 _bfd_error_handler
3359 /* xgettext:c-format */
3360 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3361 input_bfd,
3362 input_section,
3363 (long) rel->r_offset,
3364 howto->name,
3365 h->root.root.string);
3366
3367 do_relocation:
3368
3369 /* When applying a 24 bit reloc we need to start one byte
3370 earlier. Otherwise the 32 bit get/put bfd operations might
3371 access a byte after the actual section. */
3372 if (r_type == R_390_PC24DBL
3373 || r_type == R_390_PLT24DBL)
3374 rel->r_offset--;
3375
3376 if (r_type == R_390_20
3377 || r_type == R_390_GOT20
3378 || r_type == R_390_GOTPLT20
3379 || r_type == R_390_TLS_GOTIE20)
3380 {
3381 relocation += rel->r_addend;
3382 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3383 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3384 contents, rel->r_offset,
3385 relocation, 0);
3386 }
3387 else
3388 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3389 contents, rel->r_offset,
3390 relocation, rel->r_addend);
3391
3392 if (r != bfd_reloc_ok)
3393 {
3394 const char *name;
3395
3396 if (h != NULL)
3397 name = h->root.root.string;
3398 else
3399 {
3400 name = bfd_elf_string_from_elf_section (input_bfd,
3401 symtab_hdr->sh_link,
3402 sym->st_name);
3403 if (name == NULL)
3404 return FALSE;
3405 if (*name == '\0')
3406 name = bfd_section_name (input_bfd, sec);
3407 }
3408
3409 if (r == bfd_reloc_overflow)
3410 (*info->callbacks->reloc_overflow)
3411 (info, (h ? &h->root : NULL), name, howto->name,
3412 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3413 else
3414 {
3415 _bfd_error_handler
3416 /* xgettext:c-format */
3417 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3418 input_bfd, input_section,
3419 (long) rel->r_offset, name, (int) r);
3420 return FALSE;
3421 }
3422 }
3423 }
3424
3425 return TRUE;
3426 }
3427
3428 /* Generate the PLT slots together with the dynamic relocations needed
3429 for IFUNC symbols. */
3430
3431 static void
3432 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3433 struct bfd_link_info *info,
3434 struct elf_link_hash_entry *h,
3435 struct elf_s390_link_hash_table *htab,
3436 bfd_vma iplt_offset,
3437 bfd_vma resolver_address)
3438 {
3439 bfd_vma iplt_index;
3440 bfd_vma got_offset;
3441 bfd_vma igotiplt_offset;
3442 Elf_Internal_Rela rela;
3443 bfd_byte *loc;
3444 asection *plt, *gotplt, *relplt;
3445 bfd_vma relative_offset;
3446
3447 if (htab->elf.iplt == NULL
3448 || htab->elf.igotplt == NULL
3449 || htab->elf.irelplt == NULL)
3450 abort ();
3451
3452 gotplt = htab->elf.igotplt;
3453 relplt = htab->elf.irelplt;
3454
3455 /* Index of the PLT slot within iplt section. */
3456 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3457 plt = htab->elf.iplt;
3458 /* Offset into the igot.plt section. */
3459 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3460 /* Offset into the got section. */
3461 got_offset = igotiplt_offset + gotplt->output_offset;
3462
3463 /* S390 uses halfwords for relative branch calc! */
3464 relative_offset = - (plt->output_offset +
3465 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3466 /* If offset is > 32768, branch to a previous branch
3467 390 can only handle +-64 K jumps. */
3468 if ( -32768 > (int) relative_offset )
3469 relative_offset
3470 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3471
3472 /* Fill in the entry in the procedure linkage table. */
3473 if (!bfd_link_pic (info))
3474 {
3475 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3476 PLT_ENTRY_SIZE);
3477
3478 /* Adjust jump to the first plt entry. */
3479 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3480 plt->contents + iplt_offset + 20);
3481
3482 /* Push the GOT offset field. */
3483 bfd_put_32 (output_bfd,
3484 (gotplt->output_section->vma
3485 + got_offset),
3486 plt->contents + iplt_offset + 24);
3487 }
3488 else if (got_offset < 4096)
3489 {
3490 /* The GOT offset is small enough to be used directly as
3491 displacement. */
3492 memcpy (plt->contents + iplt_offset,
3493 elf_s390_plt_pic12_entry,
3494 PLT_ENTRY_SIZE);
3495
3496 /* Put in the GOT offset as displacement value. The 0xc000
3497 value comes from the first word of the plt entry. Look
3498 at the elf_s390_plt_pic16_entry content. */
3499 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3500 plt->contents + iplt_offset + 2);
3501
3502 /* Adjust the jump to the first plt entry. */
3503 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3504 plt->contents + iplt_offset + 20);
3505 }
3506 else if (got_offset < 32768)
3507 {
3508 /* The GOT offset is too big for a displacement but small
3509 enough to be a signed 16 bit immediate value as it can be
3510 used in an lhi instruction. */
3511 memcpy (plt->contents + iplt_offset,
3512 elf_s390_plt_pic16_entry,
3513 PLT_ENTRY_SIZE);
3514
3515 /* Put in the GOT offset for the lhi instruction. */
3516 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3517 plt->contents + iplt_offset + 2);
3518
3519 /* Adjust the jump to the first plt entry. */
3520 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3521 plt->contents + iplt_offset + 20);
3522 }
3523 else
3524 {
3525 memcpy (plt->contents + iplt_offset,
3526 elf_s390_plt_pic_entry,
3527 PLT_ENTRY_SIZE);
3528
3529 /* Adjust the jump to the first plt entry. */
3530 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3531 plt->contents + iplt_offset + 20);
3532
3533 /* Push the GOT offset field. */
3534 bfd_put_32 (output_bfd, got_offset,
3535 plt->contents + iplt_offset + 24);
3536 }
3537 /* Insert offset into reloc. table here. */
3538 bfd_put_32 (output_bfd, relplt->output_offset +
3539 iplt_index * RELA_ENTRY_SIZE,
3540 plt->contents + iplt_offset + 28);
3541
3542 /* Fill in the entry in the global offset table.
3543 Points to instruction after GOT offset. */
3544 bfd_put_32 (output_bfd,
3545 (plt->output_section->vma
3546 + plt->output_offset
3547 + iplt_offset
3548 + 12),
3549 gotplt->contents + igotiplt_offset);
3550
3551 /* Fill in the entry in the .rela.plt section. */
3552 rela.r_offset = gotplt->output_section->vma + got_offset;
3553
3554 if (!h
3555 || h->dynindx == -1
3556 || ((bfd_link_executable (info)
3557 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3558 && h->def_regular))
3559 {
3560 /* The symbol can be locally resolved. */
3561 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3562 rela.r_addend = resolver_address;
3563 }
3564 else
3565 {
3566 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3567 rela.r_addend = 0;
3568 }
3569
3570 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3571 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3572 }
3573
3574 /* Finish up dynamic symbol handling. We set the contents of various
3575 dynamic sections here. */
3576
3577 static bfd_boolean
3578 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3579 struct bfd_link_info *info,
3580 struct elf_link_hash_entry *h,
3581 Elf_Internal_Sym *sym)
3582 {
3583 struct elf_s390_link_hash_table *htab;
3584 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3585
3586 htab = elf_s390_hash_table (info);
3587
3588 if (h->plt.offset != (bfd_vma) -1)
3589 {
3590 bfd_vma plt_index;
3591 bfd_vma got_offset;
3592 Elf_Internal_Rela rela;
3593 bfd_byte *loc;
3594 bfd_vma relative_offset;
3595
3596 /* This symbol has an entry in the procedure linkage table. Set
3597 it up. */
3598 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3599 {
3600 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3601 htab, h->plt.offset,
3602 eh->ifunc_resolver_address +
3603 eh->ifunc_resolver_section->output_offset +
3604 eh->ifunc_resolver_section->output_section->vma);
3605 /* Do not return yet. Handling of explicit GOT slots of
3606 IFUNC symbols is below. */
3607 }
3608 else
3609 {
3610 if (h->dynindx == -1
3611 || htab->elf.splt == NULL
3612 || htab->elf.sgotplt == NULL
3613 || htab->elf.srelplt == NULL)
3614 abort ();
3615
3616 /* Calc. index no.
3617 Current offset - size first entry / entry size. */
3618 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3619
3620 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3621 addr & GOT addr. */
3622 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3623
3624 /* S390 uses halfwords for relative branch calc! */
3625 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3626 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3627 /* If offset is > 32768, branch to a previous branch
3628 390 can only handle +-64 K jumps. */
3629 if ( -32768 > (int) relative_offset )
3630 relative_offset
3631 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3632
3633 /* Fill in the entry in the procedure linkage table. */
3634 if (!bfd_link_pic (info))
3635 {
3636 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3637 PLT_ENTRY_SIZE);
3638
3639 /* Adjust jump to the first plt entry. */
3640 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3641 htab->elf.splt->contents + h->plt.offset + 20);
3642
3643 /* Push the GOT offset field. */
3644 bfd_put_32 (output_bfd,
3645 (htab->elf.sgotplt->output_section->vma
3646 + htab->elf.sgotplt->output_offset
3647 + got_offset),
3648 htab->elf.splt->contents + h->plt.offset + 24);
3649 }
3650 else if (got_offset < 4096)
3651 {
3652 /* The GOT offset is small enough to be used directly as
3653 displacement. */
3654 memcpy (htab->elf.splt->contents + h->plt.offset,
3655 elf_s390_plt_pic12_entry,
3656 PLT_ENTRY_SIZE);
3657
3658 /* Put in the GOT offset as displacement value. The 0xc000
3659 value comes from the first word of the plt entry. Look
3660 at the elf_s390_plt_pic12_entry content. */
3661 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3662 htab->elf.splt->contents + h->plt.offset + 2);
3663
3664 /* Adjust the jump to the first plt entry. */
3665 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3666 htab->elf.splt->contents + h->plt.offset + 20);
3667 }
3668 else if (got_offset < 32768)
3669 {
3670 /* The GOT offset is too big for a displacement but small
3671 enough to be a signed 16 bit immediate value as it can be
3672 used in an lhi instruction. */
3673 memcpy (htab->elf.splt->contents + h->plt.offset,
3674 elf_s390_plt_pic16_entry,
3675 PLT_ENTRY_SIZE);
3676
3677 /* Put in the GOT offset for the lhi instruction. */
3678 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3679 htab->elf.splt->contents + h->plt.offset + 2);
3680
3681 /* Adjust the jump to the first plt entry. */
3682 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3683 htab->elf.splt->contents + h->plt.offset + 20);
3684 }
3685 else
3686 {
3687 memcpy (htab->elf.splt->contents + h->plt.offset,
3688 elf_s390_plt_pic_entry,
3689 PLT_ENTRY_SIZE);
3690
3691 /* Adjust the jump to the first plt entry. */
3692 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3693 htab->elf.splt->contents + h->plt.offset + 20);
3694
3695 /* Push the GOT offset field. */
3696 bfd_put_32 (output_bfd, got_offset,
3697 htab->elf.splt->contents + h->plt.offset + 24);
3698 }
3699 /* Insert offset into reloc. table here. */
3700 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3701 htab->elf.splt->contents + h->plt.offset + 28);
3702
3703 /* Fill in the entry in the global offset table.
3704 Points to instruction after GOT offset. */
3705 bfd_put_32 (output_bfd,
3706 (htab->elf.splt->output_section->vma
3707 + htab->elf.splt->output_offset
3708 + h->plt.offset
3709 + 12),
3710 htab->elf.sgotplt->contents + got_offset);
3711
3712 /* Fill in the entry in the .rela.plt section. */
3713 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3714 + htab->elf.sgotplt->output_offset
3715 + got_offset);
3716 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3717 rela.r_addend = 0;
3718 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3719 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3720
3721 if (!h->def_regular)
3722 {
3723 /* Mark the symbol as undefined, rather than as defined in
3724 the .plt section. Leave the value alone. This is a clue
3725 for the dynamic linker, to make function pointer
3726 comparisons work between an application and shared
3727 library. */
3728 sym->st_shndx = SHN_UNDEF;
3729 }
3730 }
3731 }
3732
3733 if (h->got.offset != (bfd_vma) -1
3734 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3735 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3736 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3737 {
3738 Elf_Internal_Rela rela;
3739 bfd_byte *loc;
3740
3741 /* This symbol has an entry in the global offset table. Set it
3742 up. */
3743
3744 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3745 abort ();
3746
3747 rela.r_offset = (htab->elf.sgot->output_section->vma
3748 + htab->elf.sgot->output_offset
3749 + (h->got.offset &~ (bfd_vma) 1));
3750
3751 /* If this is a static link, or it is a -Bsymbolic link and the
3752 symbol is defined locally or was forced to be local because
3753 of a version file, we just want to emit a RELATIVE reloc.
3754 The entry in the global offset table will already have been
3755 initialized in the relocate_section function. */
3756 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3757 {
3758 if (bfd_link_pic (info))
3759 {
3760 /* An explicit GOT slot usage needs GLOB_DAT. If the
3761 symbol references local the implicit got.iplt slot
3762 will be used and the IRELATIVE reloc has been created
3763 above. */
3764 goto do_glob_dat;
3765 }
3766 else
3767 {
3768 /* For non-shared objects explicit GOT slots must be
3769 filled with the PLT slot address for pointer
3770 equality reasons. */
3771 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3772 + htab->elf.iplt->output_offset
3773 + h->plt.offset),
3774 htab->elf.sgot->contents + h->got.offset);
3775 return TRUE;
3776 }
3777 }
3778 else if (bfd_link_pic (info)
3779 && SYMBOL_REFERENCES_LOCAL (info, h))
3780 {
3781 /* If this is a static link, or it is a -Bsymbolic link and
3782 the symbol is defined locally or was forced to be local
3783 because of a version file, we just want to emit a
3784 RELATIVE reloc. The entry in the global offset table
3785 will already have been initialized in the
3786 relocate_section function. */
3787 if (!h->def_regular)
3788 return FALSE;
3789 BFD_ASSERT((h->got.offset & 1) != 0);
3790 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3791 rela.r_addend = (h->root.u.def.value
3792 + h->root.u.def.section->output_section->vma
3793 + h->root.u.def.section->output_offset);
3794 }
3795 else
3796 {
3797 BFD_ASSERT((h->got.offset & 1) == 0);
3798 do_glob_dat:
3799 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3800 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3801 rela.r_addend = 0;
3802 }
3803
3804 loc = htab->elf.srelgot->contents;
3805 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3806 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3807 }
3808
3809 if (h->needs_copy)
3810 {
3811 Elf_Internal_Rela rela;
3812 asection *s;
3813 bfd_byte *loc;
3814
3815 /* This symbols needs a copy reloc. Set it up. */
3816
3817 if (h->dynindx == -1
3818 || (h->root.type != bfd_link_hash_defined
3819 && h->root.type != bfd_link_hash_defweak)
3820 || htab->elf.srelbss == NULL
3821 || htab->elf.sreldynrelro == NULL)
3822 abort ();
3823
3824 rela.r_offset = (h->root.u.def.value
3825 + h->root.u.def.section->output_section->vma
3826 + h->root.u.def.section->output_offset);
3827 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3828 rela.r_addend = 0;
3829 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
3830 s = htab->elf.sreldynrelro;
3831 else
3832 s = htab->elf.srelbss;
3833 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3834 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3835 }
3836
3837 /* Mark some specially defined symbols as absolute. */
3838 if (h == htab->elf.hdynamic
3839 || h == htab->elf.hgot
3840 || h == htab->elf.hplt)
3841 sym->st_shndx = SHN_ABS;
3842
3843 return TRUE;
3844 }
3845
3846 /* Used to decide how to sort relocs in an optimal manner for the
3847 dynamic linker, before writing them out. */
3848
3849 static enum elf_reloc_type_class
3850 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3851 const asection *rel_sec ATTRIBUTE_UNUSED,
3852 const Elf_Internal_Rela *rela)
3853 {
3854 bfd *abfd = info->output_bfd;
3855 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3856 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3857 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3858 Elf_Internal_Sym sym;
3859
3860 if (htab->elf.dynsym == NULL
3861 || !bed->s->swap_symbol_in (abfd,
3862 (htab->elf.dynsym->contents
3863 + r_symndx * bed->s->sizeof_sym),
3864 0, &sym))
3865 abort ();
3866
3867 /* Check relocation against STT_GNU_IFUNC symbol. */
3868 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3869 return reloc_class_ifunc;
3870
3871 switch ((int) ELF32_R_TYPE (rela->r_info))
3872 {
3873 case R_390_RELATIVE:
3874 return reloc_class_relative;
3875 case R_390_JMP_SLOT:
3876 return reloc_class_plt;
3877 case R_390_COPY:
3878 return reloc_class_copy;
3879 default:
3880 return reloc_class_normal;
3881 }
3882 }
3883
3884 /* Finish up the dynamic sections. */
3885
3886 static bfd_boolean
3887 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3888 struct bfd_link_info *info)
3889 {
3890 struct elf_s390_link_hash_table *htab;
3891 bfd *dynobj;
3892 asection *sdyn;
3893 bfd *ibfd;
3894 unsigned int i;
3895
3896 htab = elf_s390_hash_table (info);
3897 dynobj = htab->elf.dynobj;
3898 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3899
3900 if (htab->elf.dynamic_sections_created)
3901 {
3902 Elf32_External_Dyn *dyncon, *dynconend;
3903
3904 if (sdyn == NULL || htab->elf.sgot == NULL)
3905 abort ();
3906
3907 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3908 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3909 for (; dyncon < dynconend; dyncon++)
3910 {
3911 Elf_Internal_Dyn dyn;
3912 asection *s;
3913
3914 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3915
3916 switch (dyn.d_tag)
3917 {
3918 default:
3919 continue;
3920
3921 case DT_PLTGOT:
3922 s = htab->elf.sgotplt;
3923 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3924 break;
3925
3926 case DT_JMPREL:
3927 s = htab->elf.srelplt;
3928 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3929 break;
3930
3931 case DT_PLTRELSZ:
3932 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3933 break;
3934 }
3935
3936 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3937 }
3938
3939 /* Fill in the special first entry in the procedure linkage table. */
3940 if (htab->elf.splt && htab->elf.splt->size > 0)
3941 {
3942 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3943 if (bfd_link_pic (info))
3944 {
3945 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3946 PLT_FIRST_ENTRY_SIZE);
3947 }
3948 else
3949 {
3950 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3951 PLT_FIRST_ENTRY_SIZE);
3952 bfd_put_32 (output_bfd,
3953 htab->elf.sgotplt->output_section->vma
3954 + htab->elf.sgotplt->output_offset,
3955 htab->elf.splt->contents + 24);
3956 }
3957 elf_section_data (htab->elf.splt->output_section)
3958 ->this_hdr.sh_entsize = 4;
3959 }
3960
3961 }
3962
3963 if (htab->elf.sgotplt)
3964 {
3965 /* Fill in the first three entries in the global offset table. */
3966 if (htab->elf.sgotplt->size > 0)
3967 {
3968 bfd_put_32 (output_bfd,
3969 (sdyn == NULL ? (bfd_vma) 0
3970 : sdyn->output_section->vma + sdyn->output_offset),
3971 htab->elf.sgotplt->contents);
3972 /* One entry for shared object struct ptr. */
3973 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3974 /* One entry for _dl_runtime_resolve. */
3975 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3976 }
3977
3978 elf_section_data (htab->elf.sgotplt->output_section)
3979 ->this_hdr.sh_entsize = 4;
3980 }
3981 /* Finish dynamic symbol for local IFUNC symbols. */
3982 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3983 {
3984 struct plt_entry *local_plt;
3985 Elf_Internal_Sym *isym;
3986 Elf_Internal_Shdr *symtab_hdr;
3987
3988 symtab_hdr = &elf_symtab_hdr (ibfd);
3989
3990 local_plt = elf_s390_local_plt (ibfd);
3991 if (local_plt != NULL)
3992 for (i = 0; i < symtab_hdr->sh_info; i++)
3993 {
3994 if (local_plt[i].plt.offset != (bfd_vma) -1)
3995 {
3996 asection *sec = local_plt[i].sec;
3997 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3998 if (isym == NULL)
3999 return FALSE;
4000
4001 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4002 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
4003 local_plt[i].plt.offset,
4004 isym->st_value
4005 + sec->output_section->vma
4006 + sec->output_offset);
4007
4008 }
4009 }
4010 }
4011 return TRUE;
4012 }
4013 \f
4014 /* Support for core dump NOTE sections. */
4015
4016 static bfd_boolean
4017 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
4018 {
4019 int offset;
4020 unsigned int size;
4021
4022 switch (note->descsz)
4023 {
4024 default:
4025 return FALSE;
4026
4027 case 224: /* S/390 Linux. */
4028 /* pr_cursig */
4029 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4030
4031 /* pr_pid */
4032 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
4033
4034 /* pr_reg */
4035 offset = 72;
4036 size = 144;
4037 break;
4038 }
4039
4040 /* Make a ".reg/999" section. */
4041 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4042 size, note->descpos + offset);
4043 }
4044
4045 static bfd_boolean
4046 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
4047 {
4048 switch (note->descsz)
4049 {
4050 default:
4051 return FALSE;
4052
4053 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
4054 elf_tdata (abfd)->core->pid
4055 = bfd_get_32 (abfd, note->descdata + 12);
4056 elf_tdata (abfd)->core->program
4057 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
4058 elf_tdata (abfd)->core->command
4059 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
4060 break;
4061 }
4062
4063 /* Note that for some reason, a spurious space is tacked
4064 onto the end of the args in some (at least one anyway)
4065 implementations, so strip it off if it exists. */
4066
4067 {
4068 char *command = elf_tdata (abfd)->core->command;
4069 int n = strlen (command);
4070
4071 if (0 < n && command[n - 1] == ' ')
4072 command[n - 1] = '\0';
4073 }
4074
4075 return TRUE;
4076 }
4077
4078 static char *
4079 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
4080 int note_type, ...)
4081 {
4082 va_list ap;
4083
4084 switch (note_type)
4085 {
4086 default:
4087 return NULL;
4088
4089 case NT_PRPSINFO:
4090 {
4091 char data[124] = { 0 };
4092 const char *fname, *psargs;
4093
4094 va_start (ap, note_type);
4095 fname = va_arg (ap, const char *);
4096 psargs = va_arg (ap, const char *);
4097 va_end (ap);
4098
4099 strncpy (data + 28, fname, 16);
4100 strncpy (data + 44, psargs, 80);
4101 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4102 &data, sizeof (data));
4103 }
4104
4105 case NT_PRSTATUS:
4106 {
4107 char data[224] = { 0 };
4108 long pid;
4109 int cursig;
4110 const void *gregs;
4111
4112 va_start (ap, note_type);
4113 pid = va_arg (ap, long);
4114 cursig = va_arg (ap, int);
4115 gregs = va_arg (ap, const void *);
4116 va_end (ap);
4117
4118 bfd_put_16 (abfd, cursig, data + 12);
4119 bfd_put_32 (abfd, pid, data + 24);
4120 memcpy (data + 72, gregs, 144);
4121 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4122 &data, sizeof (data));
4123 }
4124 }
4125 /* NOTREACHED */
4126 }
4127 \f
4128 /* Return address for Ith PLT stub in section PLT, for relocation REL
4129 or (bfd_vma) -1 if it should not be included. */
4130
4131 static bfd_vma
4132 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4133 const arelent *rel ATTRIBUTE_UNUSED)
4134 {
4135 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4136 }
4137
4138 /* Merge backend specific data from an object file to the output
4139 object file when linking. */
4140
4141 static bfd_boolean
4142 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4143 {
4144 bfd *obfd = info->output_bfd;
4145
4146 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4147 return TRUE;
4148
4149 if (!elf_s390_merge_obj_attributes (ibfd, info))
4150 return FALSE;
4151
4152 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4153 return TRUE;
4154 }
4155
4156
4157 #define TARGET_BIG_SYM s390_elf32_vec
4158 #define TARGET_BIG_NAME "elf32-s390"
4159 #define ELF_ARCH bfd_arch_s390
4160 #define ELF_TARGET_ID S390_ELF_DATA
4161 #define ELF_MACHINE_CODE EM_S390
4162 #define ELF_MACHINE_ALT1 EM_S390_OLD
4163 #define ELF_MAXPAGESIZE 0x1000
4164
4165 #define elf_backend_can_gc_sections 1
4166 #define elf_backend_can_refcount 1
4167 #define elf_backend_want_got_plt 1
4168 #define elf_backend_plt_readonly 1
4169 #define elf_backend_want_plt_sym 0
4170 #define elf_backend_got_header_size 12
4171 #define elf_backend_want_dynrelro 1
4172 #define elf_backend_rela_normal 1
4173
4174 #define elf_info_to_howto elf_s390_info_to_howto
4175
4176 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4177 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4178 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4179 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4180
4181 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4182
4183 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4184 #define elf_backend_check_relocs elf_s390_check_relocs
4185 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4186 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4187 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4188 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4189 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4190 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4191 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4192 #define elf_backend_relocate_section elf_s390_relocate_section
4193 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4194 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4195 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4196 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4197 #define elf_backend_write_core_note elf_s390_write_core_note
4198 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4199 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4200 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4201
4202 #define bfd_elf32_mkobject elf_s390_mkobject
4203 #define elf_backend_object_p elf_s390_object_p
4204
4205 #include "elf32-target.h"
GDB Binutils - Deliverables
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