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readonly_dynrelocs
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2017 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 if (dir->versioned != versioned_hidden)
877 dir->ref_dynamic |= ind->ref_dynamic;
878 dir->ref_regular |= ind->ref_regular;
879 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
880 dir->needs_plt |= ind->needs_plt;
881 }
882 else
883 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
884 }
885
886 static int
887 elf_s390_tls_transition (struct bfd_link_info *info,
888 int r_type,
889 int is_local)
890 {
891 if (bfd_link_pic (info))
892 return r_type;
893
894 switch (r_type)
895 {
896 case R_390_TLS_GD32:
897 case R_390_TLS_IE32:
898 if (is_local)
899 return R_390_TLS_LE32;
900 return R_390_TLS_IE32;
901 case R_390_TLS_GOTIE32:
902 if (is_local)
903 return R_390_TLS_LE32;
904 return R_390_TLS_GOTIE32;
905 case R_390_TLS_LDM32:
906 return R_390_TLS_LE32;
907 }
908
909 return r_type;
910 }
911
912 /* Look through the relocs for a section during the first phase, and
913 allocate space in the global offset table or procedure linkage
914 table. */
915
916 static bfd_boolean
917 elf_s390_check_relocs (bfd *abfd,
918 struct bfd_link_info *info,
919 asection *sec,
920 const Elf_Internal_Rela *relocs)
921 {
922 struct elf_s390_link_hash_table *htab;
923 Elf_Internal_Shdr *symtab_hdr;
924 struct elf_link_hash_entry **sym_hashes;
925 const Elf_Internal_Rela *rel;
926 const Elf_Internal_Rela *rel_end;
927 asection *sreloc;
928 bfd_signed_vma *local_got_refcounts;
929 int tls_type, old_tls_type;
930 Elf_Internal_Sym *isym;
931
932 if (bfd_link_relocatable (info))
933 return TRUE;
934
935 BFD_ASSERT (is_s390_elf (abfd));
936
937 htab = elf_s390_hash_table (info);
938 symtab_hdr = &elf_symtab_hdr (abfd);
939 sym_hashes = elf_sym_hashes (abfd);
940 local_got_refcounts = elf_local_got_refcounts (abfd);
941
942 sreloc = NULL;
943
944 rel_end = relocs + sec->reloc_count;
945 for (rel = relocs; rel < rel_end; rel++)
946 {
947 unsigned int r_type;
948 unsigned int r_symndx;
949 struct elf_link_hash_entry *h;
950
951 r_symndx = ELF32_R_SYM (rel->r_info);
952
953 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
954 {
955 /* xgettext:c-format */
956 _bfd_error_handler (_("%B: bad symbol index: %d"),
957 abfd, r_symndx);
958 return FALSE;
959 }
960
961 if (r_symndx < symtab_hdr->sh_info)
962 {
963 /* A local symbol. */
964 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
965 abfd, r_symndx);
966 if (isym == NULL)
967 return FALSE;
968
969 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
970 {
971 struct plt_entry *plt;
972
973 if (htab->elf.dynobj == NULL)
974 htab->elf.dynobj = abfd;
975
976 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
977 return FALSE;
978
979 if (local_got_refcounts == NULL)
980 {
981 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
982 return FALSE;
983 local_got_refcounts = elf_local_got_refcounts (abfd);
984 }
985 plt = elf_s390_local_plt (abfd);
986 plt[r_symndx].plt.refcount++;
987 }
988 h = NULL;
989 }
990 else
991 {
992 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
993 while (h->root.type == bfd_link_hash_indirect
994 || h->root.type == bfd_link_hash_warning)
995 h = (struct elf_link_hash_entry *) h->root.u.i.link;
996 }
997
998 /* Create got section and local_got_refcounts array if they
999 are needed. */
1000 r_type = elf_s390_tls_transition (info,
1001 ELF32_R_TYPE (rel->r_info),
1002 h == NULL);
1003 switch (r_type)
1004 {
1005 case R_390_GOT12:
1006 case R_390_GOT16:
1007 case R_390_GOT20:
1008 case R_390_GOT32:
1009 case R_390_GOTENT:
1010 case R_390_GOTPLT12:
1011 case R_390_GOTPLT16:
1012 case R_390_GOTPLT20:
1013 case R_390_GOTPLT32:
1014 case R_390_GOTPLTENT:
1015 case R_390_TLS_GD32:
1016 case R_390_TLS_GOTIE12:
1017 case R_390_TLS_GOTIE20:
1018 case R_390_TLS_GOTIE32:
1019 case R_390_TLS_IEENT:
1020 case R_390_TLS_IE32:
1021 case R_390_TLS_LDM32:
1022 if (h == NULL
1023 && local_got_refcounts == NULL)
1024 {
1025 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1026 return FALSE;
1027 local_got_refcounts = elf_local_got_refcounts (abfd);
1028 }
1029 /* Fall through. */
1030 case R_390_GOTOFF16:
1031 case R_390_GOTOFF32:
1032 case R_390_GOTPC:
1033 case R_390_GOTPCDBL:
1034 if (htab->elf.sgot == NULL)
1035 {
1036 if (htab->elf.dynobj == NULL)
1037 htab->elf.dynobj = abfd;
1038 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1039 return FALSE;
1040 }
1041 }
1042
1043 if (h != NULL)
1044 {
1045 if (htab->elf.dynobj == NULL)
1046 htab->elf.dynobj = abfd;
1047 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1048 return FALSE;
1049
1050 /* Make sure an IFUNC symbol defined in a non-shared object
1051 always gets a PLT slot. */
1052 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1053 {
1054 /* The symbol is called by the dynamic loader in order
1055 to resolve the relocation. So it is in fact also
1056 referenced. */
1057 h->ref_regular = 1;
1058 h->needs_plt = 1;
1059 }
1060 }
1061 switch (r_type)
1062 {
1063 case R_390_GOTPC:
1064 case R_390_GOTPCDBL:
1065 /* These relocs do not need a GOT slot. They just load the
1066 GOT pointer itself or address something else relative to
1067 the GOT. Since the GOT pointer has been set up above we
1068 are done. */
1069 break;
1070 case R_390_GOTOFF16:
1071 case R_390_GOTOFF32:
1072 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1073 break;
1074 /* Fall through. */
1075
1076 case R_390_PLT12DBL:
1077 case R_390_PLT16DBL:
1078 case R_390_PLT24DBL:
1079 case R_390_PLT32DBL:
1080 case R_390_PLT32:
1081 case R_390_PLTOFF16:
1082 case R_390_PLTOFF32:
1083 /* This symbol requires a procedure linkage table entry. We
1084 actually build the entry in adjust_dynamic_symbol,
1085 because this might be a case of linking PIC code which is
1086 never referenced by a dynamic object, in which case we
1087 don't need to generate a procedure linkage table entry
1088 after all. */
1089
1090 /* If this is a local symbol, we resolve it directly without
1091 creating a procedure linkage table entry. */
1092 if (h != NULL)
1093 {
1094 h->needs_plt = 1;
1095 h->plt.refcount += 1;
1096 }
1097 break;
1098
1099 case R_390_GOTPLT12:
1100 case R_390_GOTPLT16:
1101 case R_390_GOTPLT20:
1102 case R_390_GOTPLT32:
1103 case R_390_GOTPLTENT:
1104 /* This symbol requires either a procedure linkage table entry
1105 or an entry in the local got. We actually build the entry
1106 in adjust_dynamic_symbol because whether this is really a
1107 global reference can change and with it the fact if we have
1108 to create a plt entry or a local got entry. To be able to
1109 make a once global symbol a local one we have to keep track
1110 of the number of gotplt references that exist for this
1111 symbol. */
1112 if (h != NULL)
1113 {
1114 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1115 h->needs_plt = 1;
1116 h->plt.refcount += 1;
1117 }
1118 else
1119 local_got_refcounts[r_symndx] += 1;
1120 break;
1121
1122 case R_390_TLS_LDM32:
1123 htab->tls_ldm_got.refcount += 1;
1124 break;
1125
1126 case R_390_TLS_IE32:
1127 case R_390_TLS_GOTIE12:
1128 case R_390_TLS_GOTIE20:
1129 case R_390_TLS_GOTIE32:
1130 case R_390_TLS_IEENT:
1131 if (bfd_link_pic (info))
1132 info->flags |= DF_STATIC_TLS;
1133 /* Fall through. */
1134
1135 case R_390_GOT12:
1136 case R_390_GOT16:
1137 case R_390_GOT20:
1138 case R_390_GOT32:
1139 case R_390_GOTENT:
1140 case R_390_TLS_GD32:
1141 /* This symbol requires a global offset table entry. */
1142 switch (r_type)
1143 {
1144 default:
1145 case R_390_GOT12:
1146 case R_390_GOT16:
1147 case R_390_GOT20:
1148 case R_390_GOT32:
1149 case R_390_GOTENT:
1150 tls_type = GOT_NORMAL;
1151 break;
1152 case R_390_TLS_GD32:
1153 tls_type = GOT_TLS_GD;
1154 break;
1155 case R_390_TLS_IE32:
1156 case R_390_TLS_GOTIE32:
1157 tls_type = GOT_TLS_IE;
1158 break;
1159 case R_390_TLS_GOTIE12:
1160 case R_390_TLS_GOTIE20:
1161 case R_390_TLS_IEENT:
1162 tls_type = GOT_TLS_IE_NLT;
1163 break;
1164 }
1165
1166 if (h != NULL)
1167 {
1168 h->got.refcount += 1;
1169 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1170 }
1171 else
1172 {
1173 local_got_refcounts[r_symndx] += 1;
1174 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1175 }
1176 /* If a TLS symbol is accessed using IE at least once,
1177 there is no point to use dynamic model for it. */
1178 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1179 {
1180 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1181 {
1182 _bfd_error_handler
1183 /* xgettext:c-format */
1184 (_("%B: `%s' accessed both as normal and thread local symbol"),
1185 abfd, h->root.root.string);
1186 return FALSE;
1187 }
1188 if (old_tls_type > tls_type)
1189 tls_type = old_tls_type;
1190 }
1191
1192 if (old_tls_type != tls_type)
1193 {
1194 if (h != NULL)
1195 elf_s390_hash_entry (h)->tls_type = tls_type;
1196 else
1197 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1198 }
1199
1200 if (r_type != R_390_TLS_IE32)
1201 break;
1202 /* Fall through. */
1203
1204 case R_390_TLS_LE32:
1205 /* For static linking and executables this reloc will be
1206 calculated at linktime otherwise a TLS_TPOFF runtime
1207 reloc will be generated. */
1208 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1209 break;
1210
1211 if (!bfd_link_pic (info))
1212 break;
1213 info->flags |= DF_STATIC_TLS;
1214 /* Fall through. */
1215
1216 case R_390_8:
1217 case R_390_16:
1218 case R_390_32:
1219 case R_390_PC16:
1220 case R_390_PC12DBL:
1221 case R_390_PC16DBL:
1222 case R_390_PC24DBL:
1223 case R_390_PC32DBL:
1224 case R_390_PC32:
1225 if (h != NULL && bfd_link_executable (info))
1226 {
1227 /* If this reloc is in a read-only section, we might
1228 need a copy reloc. We can't check reliably at this
1229 stage whether the section is read-only, as input
1230 sections have not yet been mapped to output sections.
1231 Tentatively set the flag for now, and correct in
1232 adjust_dynamic_symbol. */
1233 h->non_got_ref = 1;
1234
1235 if (!bfd_link_pic (info))
1236 {
1237 /* We may need a .plt entry if the function this reloc
1238 refers to is in a shared lib. */
1239 h->plt.refcount += 1;
1240 }
1241 }
1242
1243 /* If we are creating a shared library, and this is a reloc
1244 against a global symbol, or a non PC relative reloc
1245 against a local symbol, then we need to copy the reloc
1246 into the shared library. However, if we are linking with
1247 -Bsymbolic, we do not need to copy a reloc against a
1248 global symbol which is defined in an object we are
1249 including in the link (i.e., DEF_REGULAR is set). At
1250 this point we have not seen all the input files, so it is
1251 possible that DEF_REGULAR is not set now but will be set
1252 later (it is never cleared). In case of a weak definition,
1253 DEF_REGULAR may be cleared later by a strong definition in
1254 a shared library. We account for that possibility below by
1255 storing information in the relocs_copied field of the hash
1256 table entry. A similar situation occurs when creating
1257 shared libraries and symbol visibility changes render the
1258 symbol local.
1259
1260 If on the other hand, we are creating an executable, we
1261 may need to keep relocations for symbols satisfied by a
1262 dynamic library if we manage to avoid copy relocs for the
1263 symbol. */
1264 if ((bfd_link_pic (info)
1265 && (sec->flags & SEC_ALLOC) != 0
1266 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1267 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1268 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1269 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1270 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1272 || (h != NULL
1273 && (! SYMBOLIC_BIND (info, h)
1274 || h->root.type == bfd_link_hash_defweak
1275 || !h->def_regular))))
1276 || (ELIMINATE_COPY_RELOCS
1277 && !bfd_link_pic (info)
1278 && (sec->flags & SEC_ALLOC) != 0
1279 && h != NULL
1280 && (h->root.type == bfd_link_hash_defweak
1281 || !h->def_regular)))
1282 {
1283 struct elf_dyn_relocs *p;
1284 struct elf_dyn_relocs **head;
1285
1286 /* We must copy these reloc types into the output file.
1287 Create a reloc section in dynobj and make room for
1288 this reloc. */
1289 if (sreloc == NULL)
1290 {
1291 if (htab->elf.dynobj == NULL)
1292 htab->elf.dynobj = abfd;
1293
1294 sreloc = _bfd_elf_make_dynamic_reloc_section
1295 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1296
1297 if (sreloc == NULL)
1298 return FALSE;
1299 }
1300
1301 /* If this is a global symbol, we count the number of
1302 relocations we need for this symbol. */
1303 if (h != NULL)
1304 {
1305 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1306 }
1307 else
1308 {
1309 /* Track dynamic relocs needed for local syms too.
1310 We really need local syms available to do this
1311 easily. Oh well. */
1312 asection *s;
1313 void *vpp;
1314
1315 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1316 abfd, r_symndx);
1317 if (isym == NULL)
1318 return FALSE;
1319
1320 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1321 if (s == NULL)
1322 s = sec;
1323
1324 vpp = &elf_section_data (s)->local_dynrel;
1325 head = (struct elf_dyn_relocs **) vpp;
1326 }
1327
1328 p = *head;
1329 if (p == NULL || p->sec != sec)
1330 {
1331 bfd_size_type amt = sizeof *p;
1332
1333 p = ((struct elf_dyn_relocs *)
1334 bfd_alloc (htab->elf.dynobj, amt));
1335 if (p == NULL)
1336 return FALSE;
1337 p->next = *head;
1338 *head = p;
1339 p->sec = sec;
1340 p->count = 0;
1341 p->pc_count = 0;
1342 }
1343
1344 p->count += 1;
1345 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1346 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1347 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1348 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1349 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1351 p->pc_count += 1;
1352 }
1353 break;
1354
1355 /* This relocation describes the C++ object vtable hierarchy.
1356 Reconstruct it for later use during GC. */
1357 case R_390_GNU_VTINHERIT:
1358 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1359 return FALSE;
1360 break;
1361
1362 /* This relocation describes which C++ vtable entries are actually
1363 used. Record for later use during GC. */
1364 case R_390_GNU_VTENTRY:
1365 BFD_ASSERT (h != NULL);
1366 if (h != NULL
1367 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1368 return FALSE;
1369 break;
1370
1371 default:
1372 break;
1373 }
1374 }
1375
1376 return TRUE;
1377 }
1378
1379 /* Return the section that should be marked against GC for a given
1380 relocation. */
1381
1382 static asection *
1383 elf_s390_gc_mark_hook (asection *sec,
1384 struct bfd_link_info *info,
1385 Elf_Internal_Rela *rel,
1386 struct elf_link_hash_entry *h,
1387 Elf_Internal_Sym *sym)
1388 {
1389 if (h != NULL)
1390 switch (ELF32_R_TYPE (rel->r_info))
1391 {
1392 case R_390_GNU_VTINHERIT:
1393 case R_390_GNU_VTENTRY:
1394 return NULL;
1395 }
1396 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1397
1398 }
1399
1400 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1401 entry but we found we will not create any. Called when we find we will
1402 not have any PLT for this symbol, by for example
1403 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1404 or elf_s390_size_dynamic_sections if no dynamic sections will be
1405 created (we're only linking static objects). */
1406
1407 static void
1408 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1409 {
1410 if (h->elf.root.type == bfd_link_hash_warning)
1411 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1412
1413 if (h->gotplt_refcount <= 0)
1414 return;
1415
1416 /* We simply add the number of gotplt references to the number
1417 * of got references for this symbol. */
1418 h->elf.got.refcount += h->gotplt_refcount;
1419 h->gotplt_refcount = -1;
1420 }
1421
1422 /* Find dynamic relocs for H that apply to read-only sections. */
1423
1424 static asection *
1425 readonly_dynrelocs (struct elf_link_hash_entry *h)
1426 {
1427 struct elf_dyn_relocs *p;
1428
1429 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1430 {
1431 asection *s = p->sec->output_section;
1432
1433 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1434 return p->sec;
1435 }
1436 return NULL;
1437 }
1438
1439 /* Adjust a symbol defined by a dynamic object and referenced by a
1440 regular object. The current definition is in some section of the
1441 dynamic object, but we're not including those sections. We have to
1442 change the definition to something the rest of the link can
1443 understand. */
1444
1445 static bfd_boolean
1446 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1447 struct elf_link_hash_entry *h)
1448 {
1449 struct elf_s390_link_hash_table *htab;
1450 asection *s, *srel;
1451
1452 /* STT_GNU_IFUNC symbol must go through PLT. */
1453 if (s390_is_ifunc_symbol_p (h))
1454 {
1455 /* All local STT_GNU_IFUNC references must be treated as local
1456 calls via local PLT. */
1457 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1458 {
1459 bfd_size_type pc_count = 0, count = 0;
1460 struct elf_dyn_relocs **pp;
1461 struct elf_s390_link_hash_entry *eh;
1462 struct elf_dyn_relocs *p;
1463
1464 eh = (struct elf_s390_link_hash_entry *) h;
1465 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1466 {
1467 pc_count += p->pc_count;
1468 p->count -= p->pc_count;
1469 p->pc_count = 0;
1470 count += p->count;
1471 if (p->count == 0)
1472 *pp = p->next;
1473 else
1474 pp = &p->next;
1475 }
1476
1477 if (pc_count || count)
1478 {
1479 h->needs_plt = 1;
1480 h->non_got_ref = 1;
1481 if (h->plt.refcount <= 0)
1482 h->plt.refcount = 1;
1483 else
1484 h->plt.refcount += 1;
1485 }
1486 }
1487
1488 if (h->plt.refcount <= 0)
1489 {
1490 h->plt.offset = (bfd_vma) -1;
1491 h->needs_plt = 0;
1492 }
1493 return TRUE;
1494 }
1495
1496 /* If this is a function, put it in the procedure linkage table. We
1497 will fill in the contents of the procedure linkage table later
1498 (although we could actually do it here). */
1499 if (h->type == STT_FUNC
1500 || h->needs_plt)
1501 {
1502 if (h->plt.refcount <= 0
1503 || SYMBOL_CALLS_LOCAL (info, h)
1504 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1505 && h->root.type != bfd_link_hash_undefweak))
1506 {
1507 /* This case can occur if we saw a PLT32 reloc in an input
1508 file, but the symbol was never referred to by a dynamic
1509 object, or if all references were garbage collected. In
1510 such a case, we don't actually need to build a procedure
1511 linkage table, and we can just do a PC32 reloc instead. */
1512 h->plt.offset = (bfd_vma) -1;
1513 h->needs_plt = 0;
1514 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1515 }
1516
1517 return TRUE;
1518 }
1519 else
1520 /* It's possible that we incorrectly decided a .plt reloc was
1521 needed for an R_390_PC32 reloc to a non-function sym in
1522 check_relocs. We can't decide accurately between function and
1523 non-function syms in check-relocs; Objects loaded later in
1524 the link may change h->type. So fix it now. */
1525 h->plt.offset = (bfd_vma) -1;
1526
1527 /* If this is a weak symbol, and there is a real definition, the
1528 processor independent code will have arranged for us to see the
1529 real definition first, and we can just use the same value. */
1530 if (h->is_weakalias)
1531 {
1532 struct elf_link_hash_entry *def = weakdef (h);
1533 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1534 h->root.u.def.section = def->root.u.def.section;
1535 h->root.u.def.value = def->root.u.def.value;
1536 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1537 h->non_got_ref = def->non_got_ref;
1538 return TRUE;
1539 }
1540
1541 /* This is a reference to a symbol defined by a dynamic object which
1542 is not a function. */
1543
1544 /* If we are creating a shared library, we must presume that the
1545 only references to the symbol are via the global offset table.
1546 For such cases we need not do anything here; the relocations will
1547 be handled correctly by relocate_section. */
1548 if (bfd_link_pic (info))
1549 return TRUE;
1550
1551 /* If there are no references to this symbol that do not use the
1552 GOT, we don't need to generate a copy reloc. */
1553 if (!h->non_got_ref)
1554 return TRUE;
1555
1556 /* If -z nocopyreloc was given, we won't generate them either. */
1557 if (info->nocopyreloc)
1558 {
1559 h->non_got_ref = 0;
1560 return TRUE;
1561 }
1562
1563 if (ELIMINATE_COPY_RELOCS)
1564 {
1565 struct elf_s390_link_hash_entry * eh;
1566 struct elf_dyn_relocs *p;
1567
1568 eh = (struct elf_s390_link_hash_entry *) h;
1569 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1570 {
1571 s = p->sec->output_section;
1572 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1573 break;
1574 }
1575
1576 /* If we didn't find any dynamic relocs in read-only sections, then
1577 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1578 if (p == NULL)
1579 {
1580 h->non_got_ref = 0;
1581 return TRUE;
1582 }
1583 }
1584
1585 /* We must allocate the symbol in our .dynbss section, which will
1586 become part of the .bss section of the executable. There will be
1587 an entry for this symbol in the .dynsym section. The dynamic
1588 object will contain position independent code, so all references
1589 from the dynamic object to this symbol will go through the global
1590 offset table. The dynamic linker will use the .dynsym entry to
1591 determine the address it must put in the global offset table, so
1592 both the dynamic object and the regular object will refer to the
1593 same memory location for the variable. */
1594
1595 htab = elf_s390_hash_table (info);
1596
1597 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1598 copy the initial value out of the dynamic object and into the
1599 runtime process image. */
1600 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1601 {
1602 s = htab->elf.sdynrelro;
1603 srel = htab->elf.sreldynrelro;
1604 }
1605 else
1606 {
1607 s = htab->elf.sdynbss;
1608 srel = htab->elf.srelbss;
1609 }
1610 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1611 {
1612 srel->size += sizeof (Elf32_External_Rela);
1613 h->needs_copy = 1;
1614 }
1615
1616 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1617 }
1618
1619 /* Allocate space in .plt, .got and associated reloc sections for
1620 dynamic relocs. */
1621
1622 static bfd_boolean
1623 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1624 {
1625 struct bfd_link_info *info;
1626 struct elf_s390_link_hash_table *htab;
1627 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1628 struct elf_dyn_relocs *p;
1629
1630 if (h->root.type == bfd_link_hash_indirect)
1631 return TRUE;
1632
1633 info = (struct bfd_link_info *) inf;
1634 htab = elf_s390_hash_table (info);
1635
1636 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1637 here if it is defined and referenced in a non-shared object. */
1638 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1639 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1640 else if (htab->elf.dynamic_sections_created
1641 && h->plt.refcount > 0)
1642 {
1643 /* Make sure this symbol is output as a dynamic symbol.
1644 Undefined weak syms won't yet be marked as dynamic. */
1645 if (h->dynindx == -1
1646 && !h->forced_local)
1647 {
1648 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1649 return FALSE;
1650 }
1651
1652 if (bfd_link_pic (info)
1653 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1654 {
1655 asection *s = htab->elf.splt;
1656
1657 /* If this is the first .plt entry, make room for the special
1658 first entry. */
1659 if (s->size == 0)
1660 s->size += PLT_FIRST_ENTRY_SIZE;
1661
1662 h->plt.offset = s->size;
1663
1664 /* If this symbol is not defined in a regular file, and we are
1665 not generating a shared library, then set the symbol to this
1666 location in the .plt. This is required to make function
1667 pointers compare as equal between the normal executable and
1668 the shared library. */
1669 if (! bfd_link_pic (info)
1670 && !h->def_regular)
1671 {
1672 h->root.u.def.section = s;
1673 h->root.u.def.value = h->plt.offset;
1674 }
1675
1676 /* Make room for this entry. */
1677 s->size += PLT_ENTRY_SIZE;
1678
1679 /* We also need to make an entry in the .got.plt section, which
1680 will be placed in the .got section by the linker script. */
1681 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1682
1683 /* We also need to make an entry in the .rela.plt section. */
1684 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1685 }
1686 else
1687 {
1688 h->plt.offset = (bfd_vma) -1;
1689 h->needs_plt = 0;
1690 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1691 }
1692 }
1693 else
1694 {
1695 h->plt.offset = (bfd_vma) -1;
1696 h->needs_plt = 0;
1697 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1698 }
1699
1700 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1701 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1702 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1703 we can save the dynamic TLS relocation. */
1704 if (h->got.refcount > 0
1705 && !bfd_link_pic (info)
1706 && h->dynindx == -1
1707 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1708 {
1709 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1710 /* For the GOTIE access without a literal pool entry the offset has
1711 to be stored somewhere. The immediate value in the instruction
1712 is not bit enough so the value is stored in the got. */
1713 {
1714 h->got.offset = htab->elf.sgot->size;
1715 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1716 }
1717 else
1718 h->got.offset = (bfd_vma) -1;
1719 }
1720 else if (h->got.refcount > 0)
1721 {
1722 asection *s;
1723 bfd_boolean dyn;
1724 int tls_type = elf_s390_hash_entry(h)->tls_type;
1725
1726 /* Make sure this symbol is output as a dynamic symbol.
1727 Undefined weak syms won't yet be marked as dynamic. */
1728 if (h->dynindx == -1
1729 && !h->forced_local)
1730 {
1731 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1732 return FALSE;
1733 }
1734
1735 s = htab->elf.sgot;
1736 h->got.offset = s->size;
1737 s->size += GOT_ENTRY_SIZE;
1738 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1739 if (tls_type == GOT_TLS_GD)
1740 s->size += GOT_ENTRY_SIZE;
1741 dyn = htab->elf.dynamic_sections_created;
1742 /* R_390_TLS_IE32 needs one dynamic relocation,
1743 R_390_TLS_GD32 needs one if local symbol and two if global. */
1744 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1745 || tls_type >= GOT_TLS_IE)
1746 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1747 else if (tls_type == GOT_TLS_GD)
1748 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1749 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1750 || h->root.type != bfd_link_hash_undefweak)
1751 && (bfd_link_pic (info)
1752 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1753 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1754 }
1755 else
1756 h->got.offset = (bfd_vma) -1;
1757
1758 if (eh->dyn_relocs == NULL)
1759 return TRUE;
1760
1761 /* In the shared -Bsymbolic case, discard space allocated for
1762 dynamic pc-relative relocs against symbols which turn out to be
1763 defined in regular objects. For the normal shared case, discard
1764 space for pc-relative relocs that have become local due to symbol
1765 visibility changes. */
1766
1767 if (bfd_link_pic (info))
1768 {
1769 if (SYMBOL_CALLS_LOCAL (info, h))
1770 {
1771 struct elf_dyn_relocs **pp;
1772
1773 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1774 {
1775 p->count -= p->pc_count;
1776 p->pc_count = 0;
1777 if (p->count == 0)
1778 *pp = p->next;
1779 else
1780 pp = &p->next;
1781 }
1782 }
1783
1784 /* Also discard relocs on undefined weak syms with non-default
1785 visibility. */
1786 if (eh->dyn_relocs != NULL
1787 && h->root.type == bfd_link_hash_undefweak)
1788 {
1789 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1790 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1791 eh->dyn_relocs = NULL;
1792
1793 /* Make sure undefined weak symbols are output as a dynamic
1794 symbol in PIEs. */
1795 else if (h->dynindx == -1
1796 && !h->forced_local)
1797 {
1798 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1799 return FALSE;
1800 }
1801 }
1802 }
1803 else if (ELIMINATE_COPY_RELOCS)
1804 {
1805 /* For the non-shared case, discard space for relocs against
1806 symbols which turn out to need copy relocs or are not
1807 dynamic. */
1808
1809 if (!h->non_got_ref
1810 && ((h->def_dynamic
1811 && !h->def_regular)
1812 || (htab->elf.dynamic_sections_created
1813 && (h->root.type == bfd_link_hash_undefweak
1814 || h->root.type == bfd_link_hash_undefined))))
1815 {
1816 /* Make sure this symbol is output as a dynamic symbol.
1817 Undefined weak syms won't yet be marked as dynamic. */
1818 if (h->dynindx == -1
1819 && !h->forced_local)
1820 {
1821 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1822 return FALSE;
1823 }
1824
1825 /* If that succeeded, we know we'll be keeping all the
1826 relocs. */
1827 if (h->dynindx != -1)
1828 goto keep;
1829 }
1830
1831 eh->dyn_relocs = NULL;
1832
1833 keep: ;
1834 }
1835
1836 /* Finally, allocate space. */
1837 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1838 {
1839 asection *sreloc = elf_section_data (p->sec)->sreloc;
1840
1841 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1842 }
1843
1844 return TRUE;
1845 }
1846
1847 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1848 read-only sections. */
1849
1850 static bfd_boolean
1851 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1852 {
1853 asection *sec;
1854
1855 if (h->root.type == bfd_link_hash_indirect)
1856 return TRUE;
1857
1858 sec = readonly_dynrelocs (h);
1859 if (sec != NULL)
1860 {
1861 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1862
1863 info->flags |= DF_TEXTREL;
1864 info->callbacks->minfo
1865 (_("%B: dynamic relocation against `%T' in read-only section `%A'\n"),
1866 sec->owner, h->root.root.string, sec);
1867
1868 /* Not an error, just cut short the traversal. */
1869 return FALSE;
1870 }
1871 return TRUE;
1872 }
1873
1874 /* Set the sizes of the dynamic sections. */
1875
1876 static bfd_boolean
1877 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1878 struct bfd_link_info *info)
1879 {
1880 struct elf_s390_link_hash_table *htab;
1881 bfd *dynobj;
1882 asection *s;
1883 bfd_boolean relocs;
1884 bfd *ibfd;
1885
1886 htab = elf_s390_hash_table (info);
1887 dynobj = htab->elf.dynobj;
1888 if (dynobj == NULL)
1889 abort ();
1890
1891 if (htab->elf.dynamic_sections_created)
1892 {
1893 /* Set the contents of the .interp section to the interpreter. */
1894 if (bfd_link_executable (info) && !info->nointerp)
1895 {
1896 s = bfd_get_linker_section (dynobj, ".interp");
1897 if (s == NULL)
1898 abort ();
1899 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1900 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1901 }
1902 }
1903
1904 /* Set up .got offsets for local syms, and space for local dynamic
1905 relocs. */
1906 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1907 {
1908 bfd_signed_vma *local_got;
1909 bfd_signed_vma *end_local_got;
1910 char *local_tls_type;
1911 bfd_size_type locsymcount;
1912 Elf_Internal_Shdr *symtab_hdr;
1913 asection *srela;
1914 struct plt_entry *local_plt;
1915 unsigned int i;
1916
1917 if (! is_s390_elf (ibfd))
1918 continue;
1919
1920 for (s = ibfd->sections; s != NULL; s = s->next)
1921 {
1922 struct elf_dyn_relocs *p;
1923
1924 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1925 {
1926 if (!bfd_is_abs_section (p->sec)
1927 && bfd_is_abs_section (p->sec->output_section))
1928 {
1929 /* Input section has been discarded, either because
1930 it is a copy of a linkonce section or due to
1931 linker script /DISCARD/, so we'll be discarding
1932 the relocs too. */
1933 }
1934 else if (p->count != 0)
1935 {
1936 srela = elf_section_data (p->sec)->sreloc;
1937 srela->size += p->count * sizeof (Elf32_External_Rela);
1938 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1939 info->flags |= DF_TEXTREL;
1940 }
1941 }
1942 }
1943
1944 local_got = elf_local_got_refcounts (ibfd);
1945 if (!local_got)
1946 continue;
1947
1948 symtab_hdr = &elf_symtab_hdr (ibfd);
1949 locsymcount = symtab_hdr->sh_info;
1950 end_local_got = local_got + locsymcount;
1951 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1952 s = htab->elf.sgot;
1953 srela = htab->elf.srelgot;
1954 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1955 {
1956 if (*local_got > 0)
1957 {
1958 *local_got = s->size;
1959 s->size += GOT_ENTRY_SIZE;
1960 if (*local_tls_type == GOT_TLS_GD)
1961 s->size += GOT_ENTRY_SIZE;
1962 if (bfd_link_pic (info))
1963 srela->size += sizeof (Elf32_External_Rela);
1964 }
1965 else
1966 *local_got = (bfd_vma) -1;
1967 }
1968 local_plt = elf_s390_local_plt (ibfd);
1969 for (i = 0; i < symtab_hdr->sh_info; i++)
1970 {
1971 if (local_plt[i].plt.refcount > 0)
1972 {
1973 local_plt[i].plt.offset = htab->elf.iplt->size;
1974 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1975 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1976 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1977 }
1978 else
1979 local_plt[i].plt.offset = (bfd_vma) -1;
1980 }
1981 }
1982
1983 if (htab->tls_ldm_got.refcount > 0)
1984 {
1985 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1986 relocs. */
1987 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1988 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1989 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1990 }
1991 else
1992 htab->tls_ldm_got.offset = -1;
1993
1994 /* Allocate global sym .plt and .got entries, and space for global
1995 sym dynamic relocs. */
1996 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1997
1998 /* We now have determined the sizes of the various dynamic sections.
1999 Allocate memory for them. */
2000 relocs = FALSE;
2001 for (s = dynobj->sections; s != NULL; s = s->next)
2002 {
2003 if ((s->flags & SEC_LINKER_CREATED) == 0)
2004 continue;
2005
2006 if (s == htab->elf.splt
2007 || s == htab->elf.sgot
2008 || s == htab->elf.sgotplt
2009 || s == htab->elf.sdynbss
2010 || s == htab->elf.sdynrelro
2011 || s == htab->elf.iplt
2012 || s == htab->elf.igotplt
2013 || s == htab->irelifunc)
2014 {
2015 /* Strip this section if we don't need it; see the
2016 comment below. */
2017 }
2018 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2019 {
2020 if (s->size != 0)
2021 relocs = TRUE;
2022
2023 /* We use the reloc_count field as a counter if we need
2024 to copy relocs into the output file. */
2025 s->reloc_count = 0;
2026 }
2027 else
2028 {
2029 /* It's not one of our sections, so don't allocate space. */
2030 continue;
2031 }
2032
2033 if (s->size == 0)
2034 {
2035 /* If we don't need this section, strip it from the
2036 output file. This is to handle .rela.bss and
2037 .rela.plt. We must create it in
2038 create_dynamic_sections, because it must be created
2039 before the linker maps input sections to output
2040 sections. The linker does that before
2041 adjust_dynamic_symbol is called, and it is that
2042 function which decides whether anything needs to go
2043 into these sections. */
2044
2045 s->flags |= SEC_EXCLUDE;
2046 continue;
2047 }
2048
2049 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2050 continue;
2051
2052 /* Allocate memory for the section contents. We use bfd_zalloc
2053 here in case unused entries are not reclaimed before the
2054 section's contents are written out. This should not happen,
2055 but this way if it does, we get a R_390_NONE reloc instead
2056 of garbage. */
2057 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2058 if (s->contents == NULL)
2059 return FALSE;
2060 }
2061
2062 if (htab->elf.dynamic_sections_created)
2063 {
2064 /* Add some entries to the .dynamic section. We fill in the
2065 values later, in elf_s390_finish_dynamic_sections, but we
2066 must add the entries now so that we get the correct size for
2067 the .dynamic section. The DT_DEBUG entry is filled in by the
2068 dynamic linker and used by the debugger. */
2069 #define add_dynamic_entry(TAG, VAL) \
2070 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2071
2072 if (bfd_link_executable (info))
2073 {
2074 if (!add_dynamic_entry (DT_DEBUG, 0))
2075 return FALSE;
2076 }
2077
2078 if (htab->elf.splt->size != 0)
2079 {
2080 if (!add_dynamic_entry (DT_PLTGOT, 0)
2081 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2082 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2083 || !add_dynamic_entry (DT_JMPREL, 0))
2084 return FALSE;
2085 }
2086
2087 if (relocs)
2088 {
2089 if (!add_dynamic_entry (DT_RELA, 0)
2090 || !add_dynamic_entry (DT_RELASZ, 0)
2091 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2092 return FALSE;
2093
2094 /* If any dynamic relocs apply to a read-only section,
2095 then we need a DT_TEXTREL entry. */
2096 if ((info->flags & DF_TEXTREL) == 0)
2097 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2098
2099 if ((info->flags & DF_TEXTREL) != 0)
2100 {
2101 if (!add_dynamic_entry (DT_TEXTREL, 0))
2102 return FALSE;
2103 }
2104 }
2105 }
2106 #undef add_dynamic_entry
2107
2108 return TRUE;
2109 }
2110
2111 /* Return the base VMA address which should be subtracted from real addresses
2112 when resolving @dtpoff relocation.
2113 This is PT_TLS segment p_vaddr. */
2114
2115 static bfd_vma
2116 dtpoff_base (struct bfd_link_info *info)
2117 {
2118 /* If tls_sec is NULL, we should have signalled an error already. */
2119 if (elf_hash_table (info)->tls_sec == NULL)
2120 return 0;
2121 return elf_hash_table (info)->tls_sec->vma;
2122 }
2123
2124 /* Return the relocation value for @tpoff relocation
2125 if STT_TLS virtual address is ADDRESS. */
2126
2127 static bfd_vma
2128 tpoff (struct bfd_link_info *info, bfd_vma address)
2129 {
2130 struct elf_link_hash_table *htab = elf_hash_table (info);
2131
2132 /* If tls_sec is NULL, we should have signalled an error already. */
2133 if (htab->tls_sec == NULL)
2134 return 0;
2135 return htab->tls_size + htab->tls_sec->vma - address;
2136 }
2137
2138 /* Complain if TLS instruction relocation is against an invalid
2139 instruction. */
2140
2141 static void
2142 invalid_tls_insn (bfd *input_bfd,
2143 asection *input_section,
2144 Elf_Internal_Rela *rel)
2145 {
2146 reloc_howto_type *howto;
2147
2148 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2149 _bfd_error_handler
2150 /* xgettext:c-format */
2151 (_("%B(%A+%#Lx): invalid instruction for TLS relocation %s"),
2152 input_bfd,
2153 input_section,
2154 rel->r_offset,
2155 howto->name);
2156 bfd_set_error (bfd_error_bad_value);
2157 }
2158
2159 /* Relocate a 390 ELF section. */
2160
2161 static bfd_boolean
2162 elf_s390_relocate_section (bfd *output_bfd,
2163 struct bfd_link_info *info,
2164 bfd *input_bfd,
2165 asection *input_section,
2166 bfd_byte *contents,
2167 Elf_Internal_Rela *relocs,
2168 Elf_Internal_Sym *local_syms,
2169 asection **local_sections)
2170 {
2171 struct elf_s390_link_hash_table *htab;
2172 Elf_Internal_Shdr *symtab_hdr;
2173 struct elf_link_hash_entry **sym_hashes;
2174 bfd_vma *local_got_offsets;
2175 Elf_Internal_Rela *rel;
2176 Elf_Internal_Rela *relend;
2177
2178 BFD_ASSERT (is_s390_elf (input_bfd));
2179
2180 htab = elf_s390_hash_table (info);
2181 symtab_hdr = &elf_symtab_hdr (input_bfd);
2182 sym_hashes = elf_sym_hashes (input_bfd);
2183 local_got_offsets = elf_local_got_offsets (input_bfd);
2184
2185 rel = relocs;
2186 relend = relocs + input_section->reloc_count;
2187 for (; rel < relend; rel++)
2188 {
2189 unsigned int r_type;
2190 reloc_howto_type *howto;
2191 unsigned long r_symndx;
2192 struct elf_link_hash_entry *h;
2193 Elf_Internal_Sym *sym;
2194 asection *sec;
2195 bfd_vma off;
2196 bfd_vma relocation;
2197 bfd_boolean unresolved_reloc;
2198 bfd_reloc_status_type r;
2199 int tls_type;
2200 asection *base_got = htab->elf.sgot;
2201 bfd_boolean resolved_to_zero;
2202
2203 r_type = ELF32_R_TYPE (rel->r_info);
2204 if (r_type == (int) R_390_GNU_VTINHERIT
2205 || r_type == (int) R_390_GNU_VTENTRY)
2206 continue;
2207 if (r_type >= (int) R_390_max)
2208 {
2209 bfd_set_error (bfd_error_bad_value);
2210 return FALSE;
2211 }
2212
2213 howto = elf_howto_table + r_type;
2214 r_symndx = ELF32_R_SYM (rel->r_info);
2215
2216 h = NULL;
2217 sym = NULL;
2218 sec = NULL;
2219 unresolved_reloc = FALSE;
2220 if (r_symndx < symtab_hdr->sh_info)
2221 {
2222 sym = local_syms + r_symndx;
2223 sec = local_sections[r_symndx];
2224 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2225 {
2226 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2227 if (local_plt == NULL)
2228 return FALSE;
2229
2230 /* Address of the PLT slot. */
2231 relocation = (htab->elf.iplt->output_section->vma
2232 + htab->elf.iplt->output_offset
2233 + local_plt[r_symndx].plt.offset);
2234
2235 switch (r_type)
2236 {
2237 case R_390_PLTOFF16:
2238 case R_390_PLTOFF32:
2239 relocation -= htab->elf.sgot->output_section->vma;
2240 break;
2241 case R_390_GOTPLT12:
2242 case R_390_GOTPLT16:
2243 case R_390_GOTPLT20:
2244 case R_390_GOTPLT32:
2245 case R_390_GOTPLTENT:
2246 case R_390_GOT12:
2247 case R_390_GOT16:
2248 case R_390_GOT20:
2249 case R_390_GOT32:
2250 case R_390_GOTENT:
2251 {
2252 /* Write the PLT slot address into the GOT slot. */
2253 bfd_put_32 (output_bfd, relocation,
2254 htab->elf.sgot->contents +
2255 local_got_offsets[r_symndx]);
2256 relocation = (local_got_offsets[r_symndx] +
2257 htab->elf.sgot->output_offset);
2258
2259 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2260 relocation += htab->elf.sgot->output_section->vma;
2261 break;
2262 }
2263 default:
2264 break;
2265 }
2266 /* The output section is needed later in
2267 finish_dynamic_section when creating the dynamic
2268 relocation. */
2269 local_plt[r_symndx].sec = sec;
2270 goto do_relocation;
2271 }
2272 else
2273 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2274 }
2275 else
2276 {
2277 bfd_boolean warned ATTRIBUTE_UNUSED;
2278 bfd_boolean ignored ATTRIBUTE_UNUSED;
2279
2280 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2281 r_symndx, symtab_hdr, sym_hashes,
2282 h, sec, relocation,
2283 unresolved_reloc, warned, ignored);
2284 }
2285
2286 if (sec != NULL && discarded_section (sec))
2287 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2288 rel, 1, relend, howto, 0, contents);
2289
2290 if (bfd_link_relocatable (info))
2291 continue;
2292
2293 resolved_to_zero = (h != NULL
2294 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2295
2296 switch (r_type)
2297 {
2298 case R_390_GOTPLT12:
2299 case R_390_GOTPLT16:
2300 case R_390_GOTPLT20:
2301 case R_390_GOTPLT32:
2302 case R_390_GOTPLTENT:
2303 /* There are three cases for a GOTPLT relocation. 1) The
2304 relocation is against the jump slot entry of a plt that
2305 will get emitted to the output file. 2) The relocation
2306 is against the jump slot of a plt entry that has been
2307 removed. elf_s390_adjust_gotplt has created a GOT entry
2308 as replacement. 3) The relocation is against a local symbol.
2309 Cases 2) and 3) are the same as the GOT relocation code
2310 so we just have to test for case 1 and fall through for
2311 the other two. */
2312 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2313 {
2314 bfd_vma plt_index;
2315
2316 if (s390_is_ifunc_symbol_p (h))
2317 {
2318 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2319 relocation = (plt_index * GOT_ENTRY_SIZE +
2320 htab->elf.igotplt->output_offset);
2321 if (r_type == R_390_GOTPLTENT)
2322 relocation += htab->elf.igotplt->output_section->vma;
2323 }
2324 else
2325 {
2326 /* Calc. index no.
2327 Current offset - size first entry / entry size. */
2328 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2329 PLT_ENTRY_SIZE;
2330
2331 /* Offset in GOT is PLT index plus GOT headers(3)
2332 times 4, addr & GOT addr. */
2333 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2334 if (r_type == R_390_GOTPLTENT)
2335 relocation += htab->elf.sgot->output_section->vma;
2336 }
2337 unresolved_reloc = FALSE;
2338
2339 }
2340 /* Fall through. */
2341
2342 case R_390_GOT12:
2343 case R_390_GOT16:
2344 case R_390_GOT20:
2345 case R_390_GOT32:
2346 case R_390_GOTENT:
2347 /* Relocation is to the entry for this symbol in the global
2348 offset table. */
2349 if (base_got == NULL)
2350 abort ();
2351
2352 if (h != NULL)
2353 {
2354 bfd_boolean dyn;
2355
2356 off = h->got.offset;
2357 dyn = htab->elf.dynamic_sections_created;
2358
2359 if (s390_is_ifunc_symbol_p (h))
2360 {
2361 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2362 if (off == (bfd_vma)-1)
2363 {
2364 /* No explicit GOT usage so redirect to the
2365 got.iplt slot. */
2366 base_got = htab->elf.igotplt;
2367 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2368 }
2369 else
2370 {
2371 /* Explicit GOT slots must contain the address
2372 of the PLT slot. This will be handled in
2373 finish_dynamic_symbol. */
2374 }
2375 }
2376 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2377 bfd_link_pic (info),
2378 h)
2379 || (bfd_link_pic (info)
2380 && SYMBOL_REFERENCES_LOCAL (info, h))
2381 || (ELF_ST_VISIBILITY (h->other)
2382 && h->root.type == bfd_link_hash_undefweak))
2383
2384 {
2385 /* This is actually a static link, or it is a
2386 -Bsymbolic link and the symbol is defined
2387 locally, or the symbol was forced to be local
2388 because of a version file. We must initialize
2389 this entry in the global offset table. Since the
2390 offset must always be a multiple of 2, we use the
2391 least significant bit to record whether we have
2392 initialized it already.
2393
2394 When doing a dynamic link, we create a .rel.got
2395 relocation entry to initialize the value. This
2396 is done in the finish_dynamic_symbol routine. */
2397 if ((off & 1) != 0)
2398 off &= ~1;
2399 else
2400 {
2401 bfd_put_32 (output_bfd, relocation,
2402 base_got->contents + off);
2403 h->got.offset |= 1;
2404 }
2405
2406 if ((h->def_regular
2407 && bfd_link_pic (info)
2408 && SYMBOL_REFERENCES_LOCAL (info, h))
2409 /* lrl rx,sym@GOTENT -> larl rx, sym */
2410 && ((r_type == R_390_GOTENT
2411 && (bfd_get_16 (input_bfd,
2412 contents + rel->r_offset - 2)
2413 & 0xff0f) == 0xc40d)
2414 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2415 || (r_type == R_390_GOT20
2416 && (bfd_get_32 (input_bfd,
2417 contents + rel->r_offset - 2)
2418 & 0xff00f000) == 0xe300c000
2419 && bfd_get_8 (input_bfd,
2420 contents + rel->r_offset + 3) == 0x58)))
2421 {
2422 unsigned short new_insn =
2423 (0xc000 | (bfd_get_8 (input_bfd,
2424 contents + rel->r_offset - 1) & 0xf0));
2425 bfd_put_16 (output_bfd, new_insn,
2426 contents + rel->r_offset - 2);
2427 r_type = R_390_PC32DBL;
2428 rel->r_addend = 2;
2429 howto = elf_howto_table + r_type;
2430 relocation = h->root.u.def.value
2431 + h->root.u.def.section->output_section->vma
2432 + h->root.u.def.section->output_offset;
2433 goto do_relocation;
2434 }
2435 }
2436 else
2437 unresolved_reloc = FALSE;
2438 }
2439 else
2440 {
2441 if (local_got_offsets == NULL)
2442 abort ();
2443
2444 off = local_got_offsets[r_symndx];
2445
2446 /* The offset must always be a multiple of 4. We use
2447 the least significant bit to record whether we have
2448 already generated the necessary reloc. */
2449 if ((off & 1) != 0)
2450 off &= ~1;
2451 else
2452 {
2453 bfd_put_32 (output_bfd, relocation,
2454 htab->elf.sgot->contents + off);
2455
2456 if (bfd_link_pic (info))
2457 {
2458 asection *srelgot;
2459 Elf_Internal_Rela outrel;
2460 bfd_byte *loc;
2461
2462 srelgot = htab->elf.srelgot;
2463 if (srelgot == NULL)
2464 abort ();
2465
2466 outrel.r_offset = (htab->elf.sgot->output_section->vma
2467 + htab->elf.sgot->output_offset
2468 + off);
2469 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2470 outrel.r_addend = relocation;
2471 loc = srelgot->contents;
2472 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2473 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2474 }
2475
2476 local_got_offsets[r_symndx] |= 1;
2477 }
2478 }
2479
2480 if (off >= (bfd_vma) -2)
2481 abort ();
2482
2483 relocation = base_got->output_offset + off;
2484
2485 /* For @GOTENT the relocation is against the offset between
2486 the instruction and the symbols entry in the GOT and not
2487 between the start of the GOT and the symbols entry. We
2488 add the vma of the GOT to get the correct value. */
2489 if ( r_type == R_390_GOTENT
2490 || r_type == R_390_GOTPLTENT)
2491 relocation += base_got->output_section->vma;
2492
2493 break;
2494
2495 case R_390_GOTOFF16:
2496 case R_390_GOTOFF32:
2497 /* Relocation is relative to the start of the global offset
2498 table. */
2499
2500 if (h != NULL
2501 && s390_is_ifunc_symbol_p (h)
2502 && h->def_regular
2503 && !bfd_link_executable (info))
2504 {
2505 relocation = (htab->elf.iplt->output_section->vma
2506 + htab->elf.iplt->output_offset
2507 + h->plt.offset
2508 - htab->elf.sgot->output_section->vma);
2509 goto do_relocation;
2510 }
2511
2512 /* Note that sgot->output_offset is not involved in this
2513 calculation. We always want the start of .got. If we
2514 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2515 permitted by the ABI, we might have to change this
2516 calculation. */
2517 relocation -= htab->elf.sgot->output_section->vma;
2518 break;
2519
2520 case R_390_GOTPC:
2521 case R_390_GOTPCDBL:
2522 /* Use global offset table as symbol value. */
2523 relocation = htab->elf.sgot->output_section->vma;
2524 unresolved_reloc = FALSE;
2525 break;
2526
2527 case R_390_PLT12DBL:
2528 case R_390_PLT16DBL:
2529 case R_390_PLT24DBL:
2530 case R_390_PLT32DBL:
2531 case R_390_PLT32:
2532 /* Relocation is to the entry for this symbol in the
2533 procedure linkage table. */
2534
2535 /* Resolve a PLT32 reloc against a local symbol directly,
2536 without using the procedure linkage table. */
2537 if (h == NULL)
2538 break;
2539
2540 if (h->plt.offset == (bfd_vma) -1
2541 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2542 {
2543 /* We didn't make a PLT entry for this symbol. This
2544 happens when statically linking PIC code, or when
2545 using -Bsymbolic. */
2546 break;
2547 }
2548
2549 if (s390_is_ifunc_symbol_p (h))
2550 relocation = (htab->elf.iplt->output_section->vma
2551 + htab->elf.iplt->output_offset
2552 + h->plt.offset);
2553 else
2554 relocation = (htab->elf.splt->output_section->vma
2555 + htab->elf.splt->output_offset
2556 + h->plt.offset);
2557 unresolved_reloc = FALSE;
2558 break;
2559
2560 case R_390_PLTOFF16:
2561 case R_390_PLTOFF32:
2562 /* Relocation is to the entry for this symbol in the
2563 procedure linkage table relative to the start of the GOT. */
2564
2565 /* For local symbols or if we didn't make a PLT entry for
2566 this symbol resolve the symbol directly. */
2567 if (h == NULL
2568 || h->plt.offset == (bfd_vma) -1
2569 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2570 {
2571 relocation -= htab->elf.sgot->output_section->vma;
2572 break;
2573 }
2574
2575 if (s390_is_ifunc_symbol_p (h))
2576 relocation = (htab->elf.iplt->output_section->vma
2577 + htab->elf.iplt->output_offset
2578 + h->plt.offset
2579 - htab->elf.sgot->output_section->vma);
2580 else
2581 relocation = (htab->elf.splt->output_section->vma
2582 + htab->elf.splt->output_offset
2583 + h->plt.offset
2584 - htab->elf.sgot->output_section->vma);
2585 unresolved_reloc = FALSE;
2586 break;
2587
2588 case R_390_PC16:
2589 case R_390_PC12DBL:
2590 case R_390_PC16DBL:
2591 case R_390_PC24DBL:
2592 case R_390_PC32DBL:
2593 case R_390_PC32:
2594 if (h != NULL
2595 && s390_is_ifunc_symbol_p (h)
2596 && h->def_regular
2597 && !bfd_link_executable (info))
2598 {
2599 /* This will not work our if the function does not
2600 happen to set up the GOT pointer for some other
2601 reason. 31 bit PLT entries require r12 to hold the
2602 GOT pointer.
2603 FIXME: Implement an errorcheck.
2604 NOTE: It will work when brasl is not available
2605 (e.g. with -m31 -march=g5) since a local function
2606 call then does use GOTOFF which implies r12 being set
2607 up. */
2608 relocation = (htab->elf.iplt->output_section->vma
2609 + htab->elf.iplt->output_offset
2610 + h ->plt.offset);
2611 goto do_relocation;
2612 }
2613 /* Fall through. */
2614
2615 case R_390_8:
2616 case R_390_16:
2617 case R_390_32:
2618 if (h != NULL
2619 && s390_is_ifunc_symbol_p (h)
2620 && h->def_regular)
2621 {
2622 if (!bfd_link_pic (info))
2623 {
2624 /* For a non-shared object STT_GNU_IFUNC symbol must
2625 go through PLT. */
2626 relocation = (htab->elf.iplt->output_section->vma
2627 + htab->elf.iplt->output_offset
2628 + h ->plt.offset);
2629 goto do_relocation;
2630 }
2631 else
2632 {
2633 /* For shared objects a runtime relocation is needed. */
2634
2635 Elf_Internal_Rela outrel;
2636 asection *sreloc;
2637
2638 /* Need a dynamic relocation to get the real function
2639 address. */
2640 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2641 info,
2642 input_section,
2643 rel->r_offset);
2644 if (outrel.r_offset == (bfd_vma) -1
2645 || outrel.r_offset == (bfd_vma) -2)
2646 abort ();
2647
2648 outrel.r_offset += (input_section->output_section->vma
2649 + input_section->output_offset);
2650
2651 if (h->dynindx == -1
2652 || h->forced_local
2653 || bfd_link_executable (info))
2654 {
2655 /* This symbol is resolved locally. */
2656 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2657 outrel.r_addend = (h->root.u.def.value
2658 + h->root.u.def.section->output_section->vma
2659 + h->root.u.def.section->output_offset);
2660 }
2661 else
2662 {
2663 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2664 outrel.r_addend = 0;
2665 }
2666
2667 sreloc = htab->elf.irelifunc;
2668 elf_append_rela (output_bfd, sreloc, &outrel);
2669
2670 /* If this reloc is against an external symbol, we
2671 do not want to fiddle with the addend. Otherwise,
2672 we need to include the symbol value so that it
2673 becomes an addend for the dynamic reloc. For an
2674 internal symbol, we have updated addend. */
2675 continue;
2676 }
2677 }
2678
2679 if ((input_section->flags & SEC_ALLOC) == 0)
2680 break;
2681
2682 if ((bfd_link_pic (info)
2683 && (h == NULL
2684 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2685 && !resolved_to_zero)
2686 || h->root.type != bfd_link_hash_undefweak)
2687 && ((r_type != R_390_PC16
2688 && r_type != R_390_PC12DBL
2689 && r_type != R_390_PC16DBL
2690 && r_type != R_390_PC24DBL
2691 && r_type != R_390_PC32DBL
2692 && r_type != R_390_PC32)
2693 || !SYMBOL_CALLS_LOCAL (info, h)))
2694 || (ELIMINATE_COPY_RELOCS
2695 && !bfd_link_pic (info)
2696 && h != NULL
2697 && h->dynindx != -1
2698 && !h->non_got_ref
2699 && ((h->def_dynamic
2700 && !h->def_regular)
2701 || h->root.type == bfd_link_hash_undefweak
2702 || h->root.type == bfd_link_hash_undefined)))
2703 {
2704 Elf_Internal_Rela outrel;
2705 bfd_boolean skip, relocate;
2706 asection *sreloc;
2707 bfd_byte *loc;
2708
2709 /* When generating a shared object, these relocations
2710 are copied into the output file to be resolved at run
2711 time. */
2712
2713 skip = FALSE;
2714 relocate = FALSE;
2715
2716 outrel.r_offset =
2717 _bfd_elf_section_offset (output_bfd, info, input_section,
2718 rel->r_offset);
2719 if (outrel.r_offset == (bfd_vma) -1)
2720 skip = TRUE;
2721 else if (outrel.r_offset == (bfd_vma) -2)
2722 skip = TRUE, relocate = TRUE;
2723 outrel.r_offset += (input_section->output_section->vma
2724 + input_section->output_offset);
2725
2726 if (skip)
2727 memset (&outrel, 0, sizeof outrel);
2728 else if (h != NULL
2729 && h->dynindx != -1
2730 && (r_type == R_390_PC16
2731 || r_type == R_390_PC12DBL
2732 || r_type == R_390_PC16DBL
2733 || r_type == R_390_PC24DBL
2734 || r_type == R_390_PC32DBL
2735 || r_type == R_390_PC32
2736 || !bfd_link_pic (info)
2737 || !SYMBOLIC_BIND (info, h)
2738 || !h->def_regular))
2739 {
2740 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2741 outrel.r_addend = rel->r_addend;
2742 }
2743 else
2744 {
2745 /* This symbol is local, or marked to become local. */
2746 outrel.r_addend = relocation + rel->r_addend;
2747 if (r_type == R_390_32)
2748 {
2749 relocate = TRUE;
2750 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2751 }
2752 else
2753 {
2754 long sindx;
2755
2756 if (bfd_is_abs_section (sec))
2757 sindx = 0;
2758 else if (sec == NULL || sec->owner == NULL)
2759 {
2760 bfd_set_error(bfd_error_bad_value);
2761 return FALSE;
2762 }
2763 else
2764 {
2765 asection *osec;
2766
2767 osec = sec->output_section;
2768 sindx = elf_section_data (osec)->dynindx;
2769 if (sindx == 0)
2770 {
2771 osec = htab->elf.text_index_section;
2772 sindx = elf_section_data (osec)->dynindx;
2773 }
2774 BFD_ASSERT (sindx != 0);
2775
2776 /* We are turning this relocation into one
2777 against a section symbol, so subtract out
2778 the output section's address but not the
2779 offset of the input section in the output
2780 section. */
2781 outrel.r_addend -= osec->vma;
2782 }
2783 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2784 }
2785 }
2786
2787 sreloc = elf_section_data (input_section)->sreloc;
2788 if (sreloc == NULL)
2789 abort ();
2790
2791 loc = sreloc->contents;
2792 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2793 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2794
2795 /* If this reloc is against an external symbol, we do
2796 not want to fiddle with the addend. Otherwise, we
2797 need to include the symbol value so that it becomes
2798 an addend for the dynamic reloc. */
2799 if (! relocate)
2800 continue;
2801 }
2802 break;
2803
2804 /* Relocations for tls literal pool entries. */
2805 case R_390_TLS_IE32:
2806 if (bfd_link_pic (info))
2807 {
2808 Elf_Internal_Rela outrel;
2809 asection *sreloc;
2810 bfd_byte *loc;
2811
2812 outrel.r_offset = rel->r_offset
2813 + input_section->output_section->vma
2814 + input_section->output_offset;
2815 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2816 sreloc = elf_section_data (input_section)->sreloc;
2817 if (sreloc == NULL)
2818 abort ();
2819 loc = sreloc->contents;
2820 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2821 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2822 }
2823 /* Fall through. */
2824
2825 case R_390_TLS_GD32:
2826 case R_390_TLS_GOTIE32:
2827 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2828 tls_type = GOT_UNKNOWN;
2829 if (h == NULL && local_got_offsets)
2830 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2831 else if (h != NULL)
2832 {
2833 tls_type = elf_s390_hash_entry(h)->tls_type;
2834 if (!bfd_link_pic (info)
2835 && h->dynindx == -1
2836 && tls_type >= GOT_TLS_IE)
2837 r_type = R_390_TLS_LE32;
2838 }
2839 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2840 r_type = R_390_TLS_IE32;
2841
2842 if (r_type == R_390_TLS_LE32)
2843 {
2844 /* This relocation gets optimized away by the local exec
2845 access optimization. */
2846 BFD_ASSERT (! unresolved_reloc);
2847 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2848 contents + rel->r_offset);
2849 continue;
2850 }
2851
2852 if (htab->elf.sgot == NULL)
2853 abort ();
2854
2855 if (h != NULL)
2856 off = h->got.offset;
2857 else
2858 {
2859 if (local_got_offsets == NULL)
2860 abort ();
2861
2862 off = local_got_offsets[r_symndx];
2863 }
2864
2865 emit_tls_relocs:
2866
2867 if ((off & 1) != 0)
2868 off &= ~1;
2869 else
2870 {
2871 Elf_Internal_Rela outrel;
2872 bfd_byte *loc;
2873 int dr_type, indx;
2874
2875 if (htab->elf.srelgot == NULL)
2876 abort ();
2877
2878 outrel.r_offset = (htab->elf.sgot->output_section->vma
2879 + htab->elf.sgot->output_offset + off);
2880
2881 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2882 if (r_type == R_390_TLS_GD32)
2883 dr_type = R_390_TLS_DTPMOD;
2884 else
2885 dr_type = R_390_TLS_TPOFF;
2886 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2887 outrel.r_addend = relocation - dtpoff_base (info);
2888 else
2889 outrel.r_addend = 0;
2890 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2891 loc = htab->elf.srelgot->contents;
2892 loc += htab->elf.srelgot->reloc_count++
2893 * sizeof (Elf32_External_Rela);
2894 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2895
2896 if (r_type == R_390_TLS_GD32)
2897 {
2898 if (indx == 0)
2899 {
2900 BFD_ASSERT (! unresolved_reloc);
2901 bfd_put_32 (output_bfd,
2902 relocation - dtpoff_base (info),
2903 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2904 }
2905 else
2906 {
2907 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2908 outrel.r_offset += GOT_ENTRY_SIZE;
2909 outrel.r_addend = 0;
2910 htab->elf.srelgot->reloc_count++;
2911 loc += sizeof (Elf32_External_Rela);
2912 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2913 }
2914 }
2915
2916 if (h != NULL)
2917 h->got.offset |= 1;
2918 else
2919 local_got_offsets[r_symndx] |= 1;
2920 }
2921
2922 if (off >= (bfd_vma) -2)
2923 abort ();
2924 if (r_type == ELF32_R_TYPE (rel->r_info))
2925 {
2926 relocation = htab->elf.sgot->output_offset + off;
2927 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2928 relocation += htab->elf.sgot->output_section->vma;
2929 unresolved_reloc = FALSE;
2930 }
2931 else
2932 {
2933 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2934 contents + rel->r_offset);
2935 continue;
2936 }
2937 break;
2938
2939 case R_390_TLS_GOTIE12:
2940 case R_390_TLS_GOTIE20:
2941 case R_390_TLS_IEENT:
2942 if (h == NULL)
2943 {
2944 if (local_got_offsets == NULL)
2945 abort();
2946 off = local_got_offsets[r_symndx];
2947 if (bfd_link_pic (info))
2948 goto emit_tls_relocs;
2949 }
2950 else
2951 {
2952 off = h->got.offset;
2953 tls_type = elf_s390_hash_entry(h)->tls_type;
2954 if (bfd_link_pic (info)
2955 || h->dynindx != -1
2956 || tls_type < GOT_TLS_IE)
2957 goto emit_tls_relocs;
2958 }
2959
2960 if (htab->elf.sgot == NULL)
2961 abort ();
2962
2963 BFD_ASSERT (! unresolved_reloc);
2964 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2965 htab->elf.sgot->contents + off);
2966 relocation = htab->elf.sgot->output_offset + off;
2967 if (r_type == R_390_TLS_IEENT)
2968 relocation += htab->elf.sgot->output_section->vma;
2969 unresolved_reloc = FALSE;
2970 break;
2971
2972 case R_390_TLS_LDM32:
2973 if (! bfd_link_pic (info))
2974 /* The literal pool entry this relocation refers to gets ignored
2975 by the optimized code of the local exec model. Do nothing
2976 and the value will turn out zero. */
2977 continue;
2978
2979 if (htab->elf.sgot == NULL)
2980 abort ();
2981
2982 off = htab->tls_ldm_got.offset;
2983 if (off & 1)
2984 off &= ~1;
2985 else
2986 {
2987 Elf_Internal_Rela outrel;
2988 bfd_byte *loc;
2989
2990 if (htab->elf.srelgot == NULL)
2991 abort ();
2992
2993 outrel.r_offset = (htab->elf.sgot->output_section->vma
2994 + htab->elf.sgot->output_offset + off);
2995
2996 bfd_put_32 (output_bfd, 0,
2997 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2998 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2999 outrel.r_addend = 0;
3000 loc = htab->elf.srelgot->contents;
3001 loc += htab->elf.srelgot->reloc_count++
3002 * sizeof (Elf32_External_Rela);
3003 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3004 htab->tls_ldm_got.offset |= 1;
3005 }
3006 relocation = htab->elf.sgot->output_offset + off;
3007 unresolved_reloc = FALSE;
3008 break;
3009
3010 case R_390_TLS_LE32:
3011 if (bfd_link_dll (info))
3012 {
3013 /* Linking a shared library with non-fpic code requires
3014 a R_390_TLS_TPOFF relocation. */
3015 Elf_Internal_Rela outrel;
3016 asection *sreloc;
3017 bfd_byte *loc;
3018 int indx;
3019
3020 outrel.r_offset = rel->r_offset
3021 + input_section->output_section->vma
3022 + input_section->output_offset;
3023 if (h != NULL && h->dynindx != -1)
3024 indx = h->dynindx;
3025 else
3026 indx = 0;
3027 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3028 if (indx == 0)
3029 outrel.r_addend = relocation - dtpoff_base (info);
3030 else
3031 outrel.r_addend = 0;
3032 sreloc = elf_section_data (input_section)->sreloc;
3033 if (sreloc == NULL)
3034 abort ();
3035 loc = sreloc->contents;
3036 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3037 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3038 }
3039 else
3040 {
3041 BFD_ASSERT (! unresolved_reloc);
3042 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3043 contents + rel->r_offset);
3044 }
3045 continue;
3046
3047 case R_390_TLS_LDO32:
3048 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3049 relocation -= dtpoff_base (info);
3050 else
3051 /* When converting LDO to LE, we must negate. */
3052 relocation = -tpoff (info, relocation);
3053 break;
3054
3055 /* Relocations for tls instructions. */
3056 case R_390_TLS_LOAD:
3057 case R_390_TLS_GDCALL:
3058 case R_390_TLS_LDCALL:
3059 tls_type = GOT_UNKNOWN;
3060 if (h == NULL && local_got_offsets)
3061 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3062 else if (h != NULL)
3063 tls_type = elf_s390_hash_entry(h)->tls_type;
3064
3065 if (tls_type == GOT_TLS_GD)
3066 continue;
3067
3068 if (r_type == R_390_TLS_LOAD)
3069 {
3070 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3071 {
3072 /* IE->LE transition. Four valid cases:
3073 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3074 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3075 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3076 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3077 unsigned int insn, ry;
3078
3079 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3080 if ((insn & 0xff00f000) == 0x58000000)
3081 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3082 ry = (insn & 0x000f0000);
3083 else if ((insn & 0xff0f0000) == 0x58000000)
3084 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3085 ry = (insn & 0x0000f000) << 4;
3086 else if ((insn & 0xff00f000) == 0x5800c000)
3087 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3088 ry = (insn & 0x000f0000);
3089 else if ((insn & 0xff0f0000) == 0x580c0000)
3090 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3091 ry = (insn & 0x0000f000) << 4;
3092 else
3093 {
3094 invalid_tls_insn (input_bfd, input_section, rel);
3095 return FALSE;
3096 }
3097 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3098 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3099 }
3100 }
3101 else if (r_type == R_390_TLS_GDCALL)
3102 {
3103 unsigned int insn;
3104
3105 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3106 if ((insn & 0xff000fff) != 0x4d000000 &&
3107 (insn & 0xffff0000) != 0xc0e50000 &&
3108 (insn & 0xff000000) != 0x0d000000)
3109 {
3110 invalid_tls_insn (input_bfd, input_section, rel);
3111 return FALSE;
3112 }
3113 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3114 {
3115 if ((insn & 0xff000000) == 0x0d000000)
3116 {
3117 /* GD->LE transition.
3118 basr rx, ry -> nopr r7 */
3119 insn = 0x07070000 | (insn & 0xffff);
3120 }
3121 else if ((insn & 0xff000000) == 0x4d000000)
3122 {
3123 /* GD->LE transition.
3124 bas %r14,0(%rx,%r13) -> bc 0,0 */
3125 insn = 0x47000000;
3126 }
3127 else
3128 {
3129 /* GD->LE transition.
3130 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3131 insn = 0xc0040000;
3132 bfd_put_16 (output_bfd, 0x0000,
3133 contents + rel->r_offset + 4);
3134 }
3135 }
3136 else
3137 {
3138 /* If basr is used in the pic case to invoke
3139 _tls_get_offset, something went wrong before. */
3140 if ((insn & 0xff000000) == 0x0d000000)
3141 {
3142 invalid_tls_insn (input_bfd, input_section, rel);
3143 return FALSE;
3144 }
3145
3146 if ((insn & 0xff000000) == 0x4d000000)
3147 {
3148 /* GD->IE transition.
3149 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3150 insn = 0x5822c000;
3151 }
3152 else
3153 {
3154 /* GD->IE transition.
3155 brasl %r14,__tls_get_addr@plt ->
3156 l %r2,0(%r2,%r12) ; bcr 0,0 */
3157 insn = 0x5822c000;
3158 bfd_put_16 (output_bfd, 0x0700,
3159 contents + rel->r_offset + 4);
3160 }
3161 }
3162 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3163 }
3164 else if (r_type == R_390_TLS_LDCALL)
3165 {
3166 if (!bfd_link_pic (info))
3167 {
3168 unsigned int insn;
3169
3170 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3171 if ((insn & 0xff000fff) != 0x4d000000 &&
3172 (insn & 0xffff0000) != 0xc0e50000 &&
3173 (insn & 0xff000000) != 0x0d000000)
3174 {
3175 invalid_tls_insn (input_bfd, input_section, rel);
3176 return FALSE;
3177 }
3178
3179 if ((insn & 0xff000000) == 0x0d000000)
3180 {
3181 /* LD->LE transition.
3182 basr rx, ry -> nopr r7 */
3183 insn = 0x07070000 | (insn & 0xffff);
3184 }
3185 else if ((insn & 0xff000000) == 0x4d000000)
3186 {
3187 /* LD->LE transition.
3188 bas %r14,0(%rx,%r13) -> bc 0,0 */
3189 insn = 0x47000000;
3190 }
3191 else
3192 {
3193 /* LD->LE transition.
3194 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3195 insn = 0xc0040000;
3196 bfd_put_16 (output_bfd, 0x0000,
3197 contents + rel->r_offset + 4);
3198 }
3199 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3200 }
3201 }
3202 continue;
3203
3204 default:
3205 break;
3206 }
3207
3208 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3209 because such sections are not SEC_ALLOC and thus ld.so will
3210 not process them. */
3211 if (unresolved_reloc
3212 && !((input_section->flags & SEC_DEBUGGING) != 0
3213 && h->def_dynamic)
3214 && _bfd_elf_section_offset (output_bfd, info, input_section,
3215 rel->r_offset) != (bfd_vma) -1)
3216 _bfd_error_handler
3217 /* xgettext:c-format */
3218 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3219 input_bfd,
3220 input_section,
3221 rel->r_offset,
3222 howto->name,
3223 h->root.root.string);
3224
3225 do_relocation:
3226
3227 /* When applying a 24 bit reloc we need to start one byte
3228 earlier. Otherwise the 32 bit get/put bfd operations might
3229 access a byte after the actual section. */
3230 if (r_type == R_390_PC24DBL
3231 || r_type == R_390_PLT24DBL)
3232 rel->r_offset--;
3233
3234 if (r_type == R_390_20
3235 || r_type == R_390_GOT20
3236 || r_type == R_390_GOTPLT20
3237 || r_type == R_390_TLS_GOTIE20)
3238 {
3239 relocation += rel->r_addend;
3240 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3241 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3242 contents, rel->r_offset,
3243 relocation, 0);
3244 }
3245 else
3246 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3247 contents, rel->r_offset,
3248 relocation, rel->r_addend);
3249
3250 if (r != bfd_reloc_ok)
3251 {
3252 const char *name;
3253
3254 if (h != NULL)
3255 name = h->root.root.string;
3256 else
3257 {
3258 name = bfd_elf_string_from_elf_section (input_bfd,
3259 symtab_hdr->sh_link,
3260 sym->st_name);
3261 if (name == NULL)
3262 return FALSE;
3263 if (*name == '\0')
3264 name = bfd_section_name (input_bfd, sec);
3265 }
3266
3267 if (r == bfd_reloc_overflow)
3268 (*info->callbacks->reloc_overflow)
3269 (info, (h ? &h->root : NULL), name, howto->name,
3270 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3271 else
3272 {
3273 _bfd_error_handler
3274 /* xgettext:c-format */
3275 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3276 input_bfd, input_section,
3277 rel->r_offset, name, (int) r);
3278 return FALSE;
3279 }
3280 }
3281 }
3282
3283 return TRUE;
3284 }
3285
3286 /* Generate the PLT slots together with the dynamic relocations needed
3287 for IFUNC symbols. */
3288
3289 static void
3290 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3291 struct bfd_link_info *info,
3292 struct elf_link_hash_entry *h,
3293 struct elf_s390_link_hash_table *htab,
3294 bfd_vma iplt_offset,
3295 bfd_vma resolver_address)
3296 {
3297 bfd_vma iplt_index;
3298 bfd_vma got_offset;
3299 bfd_vma igotiplt_offset;
3300 Elf_Internal_Rela rela;
3301 bfd_byte *loc;
3302 asection *plt, *gotplt, *relplt;
3303 bfd_vma relative_offset;
3304
3305 if (htab->elf.iplt == NULL
3306 || htab->elf.igotplt == NULL
3307 || htab->elf.irelplt == NULL)
3308 abort ();
3309
3310 gotplt = htab->elf.igotplt;
3311 relplt = htab->elf.irelplt;
3312
3313 /* Index of the PLT slot within iplt section. */
3314 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3315 plt = htab->elf.iplt;
3316 /* Offset into the igot.plt section. */
3317 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3318 /* Offset into the got section. */
3319 got_offset = igotiplt_offset + gotplt->output_offset;
3320
3321 /* S390 uses halfwords for relative branch calc! */
3322 relative_offset = - (plt->output_offset +
3323 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3324 /* If offset is > 32768, branch to a previous branch
3325 390 can only handle +-64 K jumps. */
3326 if ( -32768 > (int) relative_offset )
3327 relative_offset
3328 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3329
3330 /* Fill in the entry in the procedure linkage table. */
3331 if (!bfd_link_pic (info))
3332 {
3333 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3334 PLT_ENTRY_SIZE);
3335
3336 /* Adjust jump to the first plt entry. */
3337 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3338 plt->contents + iplt_offset + 20);
3339
3340 /* Push the GOT offset field. */
3341 bfd_put_32 (output_bfd,
3342 (gotplt->output_section->vma
3343 + got_offset),
3344 plt->contents + iplt_offset + 24);
3345 }
3346 else if (got_offset < 4096)
3347 {
3348 /* The GOT offset is small enough to be used directly as
3349 displacement. */
3350 memcpy (plt->contents + iplt_offset,
3351 elf_s390_plt_pic12_entry,
3352 PLT_ENTRY_SIZE);
3353
3354 /* Put in the GOT offset as displacement value. The 0xc000
3355 value comes from the first word of the plt entry. Look
3356 at the elf_s390_plt_pic16_entry content. */
3357 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3358 plt->contents + iplt_offset + 2);
3359
3360 /* Adjust the jump to the first plt entry. */
3361 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3362 plt->contents + iplt_offset + 20);
3363 }
3364 else if (got_offset < 32768)
3365 {
3366 /* The GOT offset is too big for a displacement but small
3367 enough to be a signed 16 bit immediate value as it can be
3368 used in an lhi instruction. */
3369 memcpy (plt->contents + iplt_offset,
3370 elf_s390_plt_pic16_entry,
3371 PLT_ENTRY_SIZE);
3372
3373 /* Put in the GOT offset for the lhi instruction. */
3374 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3375 plt->contents + iplt_offset + 2);
3376
3377 /* Adjust the jump to the first plt entry. */
3378 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3379 plt->contents + iplt_offset + 20);
3380 }
3381 else
3382 {
3383 memcpy (plt->contents + iplt_offset,
3384 elf_s390_plt_pic_entry,
3385 PLT_ENTRY_SIZE);
3386
3387 /* Adjust the jump to the first plt entry. */
3388 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3389 plt->contents + iplt_offset + 20);
3390
3391 /* Push the GOT offset field. */
3392 bfd_put_32 (output_bfd, got_offset,
3393 plt->contents + iplt_offset + 24);
3394 }
3395 /* Insert offset into reloc. table here. */
3396 bfd_put_32 (output_bfd, relplt->output_offset +
3397 iplt_index * RELA_ENTRY_SIZE,
3398 plt->contents + iplt_offset + 28);
3399
3400 /* Fill in the entry in the global offset table.
3401 Points to instruction after GOT offset. */
3402 bfd_put_32 (output_bfd,
3403 (plt->output_section->vma
3404 + plt->output_offset
3405 + iplt_offset
3406 + 12),
3407 gotplt->contents + igotiplt_offset);
3408
3409 /* Fill in the entry in the .rela.plt section. */
3410 rela.r_offset = gotplt->output_section->vma + got_offset;
3411
3412 if (!h
3413 || h->dynindx == -1
3414 || ((bfd_link_executable (info)
3415 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3416 && h->def_regular))
3417 {
3418 /* The symbol can be locally resolved. */
3419 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3420 rela.r_addend = resolver_address;
3421 }
3422 else
3423 {
3424 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3425 rela.r_addend = 0;
3426 }
3427
3428 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3429 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3430 }
3431
3432 /* Finish up dynamic symbol handling. We set the contents of various
3433 dynamic sections here. */
3434
3435 static bfd_boolean
3436 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3437 struct bfd_link_info *info,
3438 struct elf_link_hash_entry *h,
3439 Elf_Internal_Sym *sym)
3440 {
3441 struct elf_s390_link_hash_table *htab;
3442 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3443
3444 htab = elf_s390_hash_table (info);
3445
3446 if (h->plt.offset != (bfd_vma) -1)
3447 {
3448 bfd_vma plt_index;
3449 bfd_vma got_offset;
3450 Elf_Internal_Rela rela;
3451 bfd_byte *loc;
3452 bfd_vma relative_offset;
3453
3454 /* This symbol has an entry in the procedure linkage table. Set
3455 it up. */
3456 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3457 {
3458 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3459 htab, h->plt.offset,
3460 eh->ifunc_resolver_address +
3461 eh->ifunc_resolver_section->output_offset +
3462 eh->ifunc_resolver_section->output_section->vma);
3463 /* Do not return yet. Handling of explicit GOT slots of
3464 IFUNC symbols is below. */
3465 }
3466 else
3467 {
3468 if (h->dynindx == -1
3469 || htab->elf.splt == NULL
3470 || htab->elf.sgotplt == NULL
3471 || htab->elf.srelplt == NULL)
3472 abort ();
3473
3474 /* Calc. index no.
3475 Current offset - size first entry / entry size. */
3476 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3477
3478 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3479 addr & GOT addr. */
3480 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3481
3482 /* S390 uses halfwords for relative branch calc! */
3483 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3484 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3485 /* If offset is > 32768, branch to a previous branch
3486 390 can only handle +-64 K jumps. */
3487 if ( -32768 > (int) relative_offset )
3488 relative_offset
3489 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3490
3491 /* Fill in the entry in the procedure linkage table. */
3492 if (!bfd_link_pic (info))
3493 {
3494 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3495 PLT_ENTRY_SIZE);
3496
3497 /* Adjust jump to the first plt entry. */
3498 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3499 htab->elf.splt->contents + h->plt.offset + 20);
3500
3501 /* Push the GOT offset field. */
3502 bfd_put_32 (output_bfd,
3503 (htab->elf.sgotplt->output_section->vma
3504 + htab->elf.sgotplt->output_offset
3505 + got_offset),
3506 htab->elf.splt->contents + h->plt.offset + 24);
3507 }
3508 else if (got_offset < 4096)
3509 {
3510 /* The GOT offset is small enough to be used directly as
3511 displacement. */
3512 memcpy (htab->elf.splt->contents + h->plt.offset,
3513 elf_s390_plt_pic12_entry,
3514 PLT_ENTRY_SIZE);
3515
3516 /* Put in the GOT offset as displacement value. The 0xc000
3517 value comes from the first word of the plt entry. Look
3518 at the elf_s390_plt_pic12_entry content. */
3519 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3520 htab->elf.splt->contents + h->plt.offset + 2);
3521
3522 /* Adjust the jump to the first plt entry. */
3523 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3524 htab->elf.splt->contents + h->plt.offset + 20);
3525 }
3526 else if (got_offset < 32768)
3527 {
3528 /* The GOT offset is too big for a displacement but small
3529 enough to be a signed 16 bit immediate value as it can be
3530 used in an lhi instruction. */
3531 memcpy (htab->elf.splt->contents + h->plt.offset,
3532 elf_s390_plt_pic16_entry,
3533 PLT_ENTRY_SIZE);
3534
3535 /* Put in the GOT offset for the lhi instruction. */
3536 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3537 htab->elf.splt->contents + h->plt.offset + 2);
3538
3539 /* Adjust the jump to the first plt entry. */
3540 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3541 htab->elf.splt->contents + h->plt.offset + 20);
3542 }
3543 else
3544 {
3545 memcpy (htab->elf.splt->contents + h->plt.offset,
3546 elf_s390_plt_pic_entry,
3547 PLT_ENTRY_SIZE);
3548
3549 /* Adjust the jump to the first plt entry. */
3550 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3551 htab->elf.splt->contents + h->plt.offset + 20);
3552
3553 /* Push the GOT offset field. */
3554 bfd_put_32 (output_bfd, got_offset,
3555 htab->elf.splt->contents + h->plt.offset + 24);
3556 }
3557 /* Insert offset into reloc. table here. */
3558 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3559 htab->elf.splt->contents + h->plt.offset + 28);
3560
3561 /* Fill in the entry in the global offset table.
3562 Points to instruction after GOT offset. */
3563 bfd_put_32 (output_bfd,
3564 (htab->elf.splt->output_section->vma
3565 + htab->elf.splt->output_offset
3566 + h->plt.offset
3567 + 12),
3568 htab->elf.sgotplt->contents + got_offset);
3569
3570 /* Fill in the entry in the .rela.plt section. */
3571 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3572 + htab->elf.sgotplt->output_offset
3573 + got_offset);
3574 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3575 rela.r_addend = 0;
3576 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3577 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3578
3579 if (!h->def_regular)
3580 {
3581 /* Mark the symbol as undefined, rather than as defined in
3582 the .plt section. Leave the value alone. This is a clue
3583 for the dynamic linker, to make function pointer
3584 comparisons work between an application and shared
3585 library. */
3586 sym->st_shndx = SHN_UNDEF;
3587 }
3588 }
3589 }
3590
3591 if (h->got.offset != (bfd_vma) -1
3592 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3593 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3594 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3595 {
3596 Elf_Internal_Rela rela;
3597 bfd_byte *loc;
3598
3599 /* This symbol has an entry in the global offset table. Set it
3600 up. */
3601
3602 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3603 abort ();
3604
3605 rela.r_offset = (htab->elf.sgot->output_section->vma
3606 + htab->elf.sgot->output_offset
3607 + (h->got.offset &~ (bfd_vma) 1));
3608
3609 /* If this is a static link, or it is a -Bsymbolic link and the
3610 symbol is defined locally or was forced to be local because
3611 of a version file, we just want to emit a RELATIVE reloc.
3612 The entry in the global offset table will already have been
3613 initialized in the relocate_section function. */
3614 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3615 {
3616 if (bfd_link_pic (info))
3617 {
3618 /* An explicit GOT slot usage needs GLOB_DAT. If the
3619 symbol references local the implicit got.iplt slot
3620 will be used and the IRELATIVE reloc has been created
3621 above. */
3622 goto do_glob_dat;
3623 }
3624 else
3625 {
3626 /* For non-shared objects explicit GOT slots must be
3627 filled with the PLT slot address for pointer
3628 equality reasons. */
3629 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3630 + htab->elf.iplt->output_offset
3631 + h->plt.offset),
3632 htab->elf.sgot->contents + h->got.offset);
3633 return TRUE;
3634 }
3635 }
3636 else if (bfd_link_pic (info)
3637 && SYMBOL_REFERENCES_LOCAL (info, h))
3638 {
3639 /* If this is a static link, or it is a -Bsymbolic link and
3640 the symbol is defined locally or was forced to be local
3641 because of a version file, we just want to emit a
3642 RELATIVE reloc. The entry in the global offset table
3643 will already have been initialized in the
3644 relocate_section function. */
3645 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3646 return FALSE;
3647 BFD_ASSERT((h->got.offset & 1) != 0);
3648 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3649 rela.r_addend = (h->root.u.def.value
3650 + h->root.u.def.section->output_section->vma
3651 + h->root.u.def.section->output_offset);
3652 }
3653 else
3654 {
3655 BFD_ASSERT((h->got.offset & 1) == 0);
3656 do_glob_dat:
3657 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3658 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3659 rela.r_addend = 0;
3660 }
3661
3662 loc = htab->elf.srelgot->contents;
3663 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3664 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3665 }
3666
3667 if (h->needs_copy)
3668 {
3669 Elf_Internal_Rela rela;
3670 asection *s;
3671 bfd_byte *loc;
3672
3673 /* This symbols needs a copy reloc. Set it up. */
3674
3675 if (h->dynindx == -1
3676 || (h->root.type != bfd_link_hash_defined
3677 && h->root.type != bfd_link_hash_defweak)
3678 || htab->elf.srelbss == NULL
3679 || htab->elf.sreldynrelro == NULL)
3680 abort ();
3681
3682 rela.r_offset = (h->root.u.def.value
3683 + h->root.u.def.section->output_section->vma
3684 + h->root.u.def.section->output_offset);
3685 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3686 rela.r_addend = 0;
3687 if (h->root.u.def.section == htab->elf.sdynrelro)
3688 s = htab->elf.sreldynrelro;
3689 else
3690 s = htab->elf.srelbss;
3691 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3692 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3693 }
3694
3695 /* Mark some specially defined symbols as absolute. */
3696 if (h == htab->elf.hdynamic
3697 || h == htab->elf.hgot
3698 || h == htab->elf.hplt)
3699 sym->st_shndx = SHN_ABS;
3700
3701 return TRUE;
3702 }
3703
3704 /* Used to decide how to sort relocs in an optimal manner for the
3705 dynamic linker, before writing them out. */
3706
3707 static enum elf_reloc_type_class
3708 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3709 const asection *rel_sec ATTRIBUTE_UNUSED,
3710 const Elf_Internal_Rela *rela)
3711 {
3712 bfd *abfd = info->output_bfd;
3713 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3714 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3715 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3716 Elf_Internal_Sym sym;
3717
3718 if (htab->elf.dynsym == NULL
3719 || !bed->s->swap_symbol_in (abfd,
3720 (htab->elf.dynsym->contents
3721 + r_symndx * bed->s->sizeof_sym),
3722 0, &sym))
3723 abort ();
3724
3725 /* Check relocation against STT_GNU_IFUNC symbol. */
3726 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3727 return reloc_class_ifunc;
3728
3729 switch ((int) ELF32_R_TYPE (rela->r_info))
3730 {
3731 case R_390_RELATIVE:
3732 return reloc_class_relative;
3733 case R_390_JMP_SLOT:
3734 return reloc_class_plt;
3735 case R_390_COPY:
3736 return reloc_class_copy;
3737 default:
3738 return reloc_class_normal;
3739 }
3740 }
3741
3742 /* Finish up the dynamic sections. */
3743
3744 static bfd_boolean
3745 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3746 struct bfd_link_info *info)
3747 {
3748 struct elf_s390_link_hash_table *htab;
3749 bfd *dynobj;
3750 asection *sdyn;
3751 bfd *ibfd;
3752 unsigned int i;
3753
3754 htab = elf_s390_hash_table (info);
3755 dynobj = htab->elf.dynobj;
3756 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3757
3758 if (htab->elf.dynamic_sections_created)
3759 {
3760 Elf32_External_Dyn *dyncon, *dynconend;
3761
3762 if (sdyn == NULL || htab->elf.sgot == NULL)
3763 abort ();
3764
3765 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3766 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3767 for (; dyncon < dynconend; dyncon++)
3768 {
3769 Elf_Internal_Dyn dyn;
3770 asection *s;
3771
3772 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3773
3774 switch (dyn.d_tag)
3775 {
3776 default:
3777 continue;
3778
3779 case DT_PLTGOT:
3780 s = htab->elf.sgotplt;
3781 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3782 break;
3783
3784 case DT_JMPREL:
3785 s = htab->elf.srelplt;
3786 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3787 break;
3788
3789 case DT_PLTRELSZ:
3790 dyn.d_un.d_val = htab->elf.srelplt->size;
3791 if (htab->elf.irelplt)
3792 dyn.d_un.d_val += htab->elf.irelplt->size;
3793 break;
3794 }
3795
3796 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3797 }
3798
3799 /* Fill in the special first entry in the procedure linkage table. */
3800 if (htab->elf.splt && htab->elf.splt->size > 0)
3801 {
3802 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3803 if (bfd_link_pic (info))
3804 {
3805 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3806 PLT_FIRST_ENTRY_SIZE);
3807 }
3808 else
3809 {
3810 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3811 PLT_FIRST_ENTRY_SIZE);
3812 bfd_put_32 (output_bfd,
3813 htab->elf.sgotplt->output_section->vma
3814 + htab->elf.sgotplt->output_offset,
3815 htab->elf.splt->contents + 24);
3816 }
3817 elf_section_data (htab->elf.splt->output_section)
3818 ->this_hdr.sh_entsize = 4;
3819 }
3820
3821 }
3822
3823 if (htab->elf.sgotplt)
3824 {
3825 /* Fill in the first three entries in the global offset table. */
3826 if (htab->elf.sgotplt->size > 0)
3827 {
3828 bfd_put_32 (output_bfd,
3829 (sdyn == NULL ? (bfd_vma) 0
3830 : sdyn->output_section->vma + sdyn->output_offset),
3831 htab->elf.sgotplt->contents);
3832 /* One entry for shared object struct ptr. */
3833 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3834 /* One entry for _dl_runtime_resolve. */
3835 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3836 }
3837
3838 elf_section_data (htab->elf.sgotplt->output_section)
3839 ->this_hdr.sh_entsize = 4;
3840 }
3841 /* Finish dynamic symbol for local IFUNC symbols. */
3842 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3843 {
3844 struct plt_entry *local_plt;
3845 Elf_Internal_Sym *isym;
3846 Elf_Internal_Shdr *symtab_hdr;
3847
3848 symtab_hdr = &elf_symtab_hdr (ibfd);
3849
3850 if (!is_s390_elf (ibfd))
3851 continue;
3852
3853 local_plt = elf_s390_local_plt (ibfd);
3854 if (local_plt != NULL)
3855 for (i = 0; i < symtab_hdr->sh_info; i++)
3856 {
3857 if (local_plt[i].plt.offset != (bfd_vma) -1)
3858 {
3859 asection *sec = local_plt[i].sec;
3860 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3861 if (isym == NULL)
3862 return FALSE;
3863
3864 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3865 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3866 local_plt[i].plt.offset,
3867 isym->st_value
3868 + sec->output_section->vma
3869 + sec->output_offset);
3870
3871 }
3872 }
3873 }
3874 return TRUE;
3875 }
3876 \f
3877 /* Support for core dump NOTE sections. */
3878
3879 static bfd_boolean
3880 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3881 {
3882 int offset;
3883 unsigned int size;
3884
3885 switch (note->descsz)
3886 {
3887 default:
3888 return FALSE;
3889
3890 case 224: /* S/390 Linux. */
3891 /* pr_cursig */
3892 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3893
3894 /* pr_pid */
3895 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3896
3897 /* pr_reg */
3898 offset = 72;
3899 size = 144;
3900 break;
3901 }
3902
3903 /* Make a ".reg/999" section. */
3904 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3905 size, note->descpos + offset);
3906 }
3907
3908 static bfd_boolean
3909 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3910 {
3911 switch (note->descsz)
3912 {
3913 default:
3914 return FALSE;
3915
3916 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3917 elf_tdata (abfd)->core->pid
3918 = bfd_get_32 (abfd, note->descdata + 12);
3919 elf_tdata (abfd)->core->program
3920 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3921 elf_tdata (abfd)->core->command
3922 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3923 break;
3924 }
3925
3926 /* Note that for some reason, a spurious space is tacked
3927 onto the end of the args in some (at least one anyway)
3928 implementations, so strip it off if it exists. */
3929
3930 {
3931 char *command = elf_tdata (abfd)->core->command;
3932 int n = strlen (command);
3933
3934 if (0 < n && command[n - 1] == ' ')
3935 command[n - 1] = '\0';
3936 }
3937
3938 return TRUE;
3939 }
3940
3941 static char *
3942 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3943 int note_type, ...)
3944 {
3945 va_list ap;
3946
3947 switch (note_type)
3948 {
3949 default:
3950 return NULL;
3951
3952 case NT_PRPSINFO:
3953 {
3954 char data[124] = { 0 };
3955 const char *fname, *psargs;
3956
3957 va_start (ap, note_type);
3958 fname = va_arg (ap, const char *);
3959 psargs = va_arg (ap, const char *);
3960 va_end (ap);
3961
3962 strncpy (data + 28, fname, 16);
3963 strncpy (data + 44, psargs, 80);
3964 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3965 &data, sizeof (data));
3966 }
3967
3968 case NT_PRSTATUS:
3969 {
3970 char data[224] = { 0 };
3971 long pid;
3972 int cursig;
3973 const void *gregs;
3974
3975 va_start (ap, note_type);
3976 pid = va_arg (ap, long);
3977 cursig = va_arg (ap, int);
3978 gregs = va_arg (ap, const void *);
3979 va_end (ap);
3980
3981 bfd_put_16 (abfd, cursig, data + 12);
3982 bfd_put_32 (abfd, pid, data + 24);
3983 memcpy (data + 72, gregs, 144);
3984 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3985 &data, sizeof (data));
3986 }
3987 }
3988 /* NOTREACHED */
3989 }
3990 \f
3991 /* Return address for Ith PLT stub in section PLT, for relocation REL
3992 or (bfd_vma) -1 if it should not be included. */
3993
3994 static bfd_vma
3995 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3996 const arelent *rel ATTRIBUTE_UNUSED)
3997 {
3998 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3999 }
4000
4001 /* Merge backend specific data from an object file to the output
4002 object file when linking. */
4003
4004 static bfd_boolean
4005 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4006 {
4007 bfd *obfd = info->output_bfd;
4008
4009 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4010 return TRUE;
4011
4012 if (!elf_s390_merge_obj_attributes (ibfd, info))
4013 return FALSE;
4014
4015 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4016 return TRUE;
4017 }
4018
4019
4020 #define TARGET_BIG_SYM s390_elf32_vec
4021 #define TARGET_BIG_NAME "elf32-s390"
4022 #define ELF_ARCH bfd_arch_s390
4023 #define ELF_TARGET_ID S390_ELF_DATA
4024 #define ELF_MACHINE_CODE EM_S390
4025 #define ELF_MACHINE_ALT1 EM_S390_OLD
4026 #define ELF_MAXPAGESIZE 0x1000
4027
4028 #define elf_backend_can_gc_sections 1
4029 #define elf_backend_can_refcount 1
4030 #define elf_backend_want_got_plt 1
4031 #define elf_backend_plt_readonly 1
4032 #define elf_backend_want_plt_sym 0
4033 #define elf_backend_got_header_size 12
4034 #define elf_backend_want_dynrelro 1
4035 #define elf_backend_rela_normal 1
4036
4037 #define elf_info_to_howto elf_s390_info_to_howto
4038
4039 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4040 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4041 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4042 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4043
4044 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4045
4046 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4047 #define elf_backend_check_relocs elf_s390_check_relocs
4048 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4049 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4050 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4051 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4052 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4053 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4054 #define elf_backend_relocate_section elf_s390_relocate_section
4055 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4056 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4057 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4058 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4059 #define elf_backend_write_core_note elf_s390_write_core_note
4060 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4061 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4062 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4063
4064 #define bfd_elf32_mkobject elf_s390_mkobject
4065 #define elf_backend_object_p elf_s390_object_p
4066
4067 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4068
4069 #include "elf32-target.h"
GDB Binutils - Deliverables
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