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[binutils-gdb.git] / bfd / elf32-s390.c
blobce5c98be869a95af3104b6badb39c3401af6a253
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 /* PR15323, ref flags aren't set for references in the same
998 object. */
999 h->root.non_ir_ref_regular = 1;
1000 }
1001
1002 /* Create got section and local_got_refcounts array if they
1003 are needed. */
1004 r_type = elf_s390_tls_transition (info,
1005 ELF32_R_TYPE (rel->r_info),
1006 h == NULL);
1007 switch (r_type)
1008 {
1009 case R_390_GOT12:
1010 case R_390_GOT16:
1011 case R_390_GOT20:
1012 case R_390_GOT32:
1013 case R_390_GOTENT:
1014 case R_390_GOTPLT12:
1015 case R_390_GOTPLT16:
1016 case R_390_GOTPLT20:
1017 case R_390_GOTPLT32:
1018 case R_390_GOTPLTENT:
1019 case R_390_TLS_GD32:
1020 case R_390_TLS_GOTIE12:
1021 case R_390_TLS_GOTIE20:
1022 case R_390_TLS_GOTIE32:
1023 case R_390_TLS_IEENT:
1024 case R_390_TLS_IE32:
1025 case R_390_TLS_LDM32:
1026 if (h == NULL
1027 && local_got_refcounts == NULL)
1028 {
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1030 return FALSE;
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1032 }
1033 /* Fall through. */
1034 case R_390_GOTOFF16:
1035 case R_390_GOTOFF32:
1036 case R_390_GOTPC:
1037 case R_390_GOTPCDBL:
1038 if (htab->elf.sgot == NULL)
1039 {
1040 if (htab->elf.dynobj == NULL)
1041 htab->elf.dynobj = abfd;
1042 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1043 return FALSE;
1044 }
1045 }
1046
1047 if (h != NULL)
1048 {
1049 if (htab->elf.dynobj == NULL)
1050 htab->elf.dynobj = abfd;
1051 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1052 return FALSE;
1053
1054 /* Make sure an IFUNC symbol defined in a non-shared object
1055 always gets a PLT slot. */
1056 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1057 {
1058 /* The symbol is called by the dynamic loader in order
1059 to resolve the relocation. So it is in fact also
1060 referenced. */
1061 h->ref_regular = 1;
1062 h->needs_plt = 1;
1063 }
1064 }
1065 switch (r_type)
1066 {
1067 case R_390_GOTPC:
1068 case R_390_GOTPCDBL:
1069 /* These relocs do not need a GOT slot. They just load the
1070 GOT pointer itself or address something else relative to
1071 the GOT. Since the GOT pointer has been set up above we
1072 are done. */
1073 break;
1074 case R_390_GOTOFF16:
1075 case R_390_GOTOFF32:
1076 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1077 break;
1078 /* Fall through. */
1079
1080 case R_390_PLT12DBL:
1081 case R_390_PLT16DBL:
1082 case R_390_PLT24DBL:
1083 case R_390_PLT32DBL:
1084 case R_390_PLT32:
1085 case R_390_PLTOFF16:
1086 case R_390_PLTOFF32:
1087 /* This symbol requires a procedure linkage table entry. We
1088 actually build the entry in adjust_dynamic_symbol,
1089 because this might be a case of linking PIC code which is
1090 never referenced by a dynamic object, in which case we
1091 don't need to generate a procedure linkage table entry
1092 after all. */
1093
1094 /* If this is a local symbol, we resolve it directly without
1095 creating a procedure linkage table entry. */
1096 if (h != NULL)
1097 {
1098 h->needs_plt = 1;
1099 h->plt.refcount += 1;
1100 }
1101 break;
1102
1103 case R_390_GOTPLT12:
1104 case R_390_GOTPLT16:
1105 case R_390_GOTPLT20:
1106 case R_390_GOTPLT32:
1107 case R_390_GOTPLTENT:
1108 /* This symbol requires either a procedure linkage table entry
1109 or an entry in the local got. We actually build the entry
1110 in adjust_dynamic_symbol because whether this is really a
1111 global reference can change and with it the fact if we have
1112 to create a plt entry or a local got entry. To be able to
1113 make a once global symbol a local one we have to keep track
1114 of the number of gotplt references that exist for this
1115 symbol. */
1116 if (h != NULL)
1117 {
1118 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1119 h->needs_plt = 1;
1120 h->plt.refcount += 1;
1121 }
1122 else
1123 local_got_refcounts[r_symndx] += 1;
1124 break;
1125
1126 case R_390_TLS_LDM32:
1127 htab->tls_ldm_got.refcount += 1;
1128 break;
1129
1130 case R_390_TLS_IE32:
1131 case R_390_TLS_GOTIE12:
1132 case R_390_TLS_GOTIE20:
1133 case R_390_TLS_GOTIE32:
1134 case R_390_TLS_IEENT:
1135 if (bfd_link_pic (info))
1136 info->flags |= DF_STATIC_TLS;
1137 /* Fall through. */
1138
1139 case R_390_GOT12:
1140 case R_390_GOT16:
1141 case R_390_GOT20:
1142 case R_390_GOT32:
1143 case R_390_GOTENT:
1144 case R_390_TLS_GD32:
1145 /* This symbol requires a global offset table entry. */
1146 switch (r_type)
1147 {
1148 default:
1149 case R_390_GOT12:
1150 case R_390_GOT16:
1151 case R_390_GOT20:
1152 case R_390_GOT32:
1153 case R_390_GOTENT:
1154 tls_type = GOT_NORMAL;
1155 break;
1156 case R_390_TLS_GD32:
1157 tls_type = GOT_TLS_GD;
1158 break;
1159 case R_390_TLS_IE32:
1160 case R_390_TLS_GOTIE32:
1161 tls_type = GOT_TLS_IE;
1162 break;
1163 case R_390_TLS_GOTIE12:
1164 case R_390_TLS_GOTIE20:
1165 case R_390_TLS_IEENT:
1166 tls_type = GOT_TLS_IE_NLT;
1167 break;
1168 }
1169
1170 if (h != NULL)
1171 {
1172 h->got.refcount += 1;
1173 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1174 }
1175 else
1176 {
1177 local_got_refcounts[r_symndx] += 1;
1178 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1179 }
1180 /* If a TLS symbol is accessed using IE at least once,
1181 there is no point to use dynamic model for it. */
1182 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1183 {
1184 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1185 {
1186 _bfd_error_handler
1187 /* xgettext:c-format */
1188 (_("%B: `%s' accessed both as normal and thread local symbol"),
1189 abfd, h->root.root.string);
1190 return FALSE;
1191 }
1192 if (old_tls_type > tls_type)
1193 tls_type = old_tls_type;
1194 }
1195
1196 if (old_tls_type != tls_type)
1197 {
1198 if (h != NULL)
1199 elf_s390_hash_entry (h)->tls_type = tls_type;
1200 else
1201 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1202 }
1203
1204 if (r_type != R_390_TLS_IE32)
1205 break;
1206 /* Fall through. */
1207
1208 case R_390_TLS_LE32:
1209 /* For static linking and executables this reloc will be
1210 calculated at linktime otherwise a TLS_TPOFF runtime
1211 reloc will be generated. */
1212 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1213 break;
1214
1215 if (!bfd_link_pic (info))
1216 break;
1217 info->flags |= DF_STATIC_TLS;
1218 /* Fall through. */
1219
1220 case R_390_8:
1221 case R_390_16:
1222 case R_390_32:
1223 case R_390_PC16:
1224 case R_390_PC12DBL:
1225 case R_390_PC16DBL:
1226 case R_390_PC24DBL:
1227 case R_390_PC32DBL:
1228 case R_390_PC32:
1229 if (h != NULL && bfd_link_executable (info))
1230 {
1231 /* If this reloc is in a read-only section, we might
1232 need a copy reloc. We can't check reliably at this
1233 stage whether the section is read-only, as input
1234 sections have not yet been mapped to output sections.
1235 Tentatively set the flag for now, and correct in
1236 adjust_dynamic_symbol. */
1237 h->non_got_ref = 1;
1238
1239 if (!bfd_link_pic (info))
1240 {
1241 /* We may need a .plt entry if the function this reloc
1242 refers to is in a shared lib. */
1243 h->plt.refcount += 1;
1244 }
1245 }
1246
1247 /* If we are creating a shared library, and this is a reloc
1248 against a global symbol, or a non PC relative reloc
1249 against a local symbol, then we need to copy the reloc
1250 into the shared library. However, if we are linking with
1251 -Bsymbolic, we do not need to copy a reloc against a
1252 global symbol which is defined in an object we are
1253 including in the link (i.e., DEF_REGULAR is set). At
1254 this point we have not seen all the input files, so it is
1255 possible that DEF_REGULAR is not set now but will be set
1256 later (it is never cleared). In case of a weak definition,
1257 DEF_REGULAR may be cleared later by a strong definition in
1258 a shared library. We account for that possibility below by
1259 storing information in the relocs_copied field of the hash
1260 table entry. A similar situation occurs when creating
1261 shared libraries and symbol visibility changes render the
1262 symbol local.
1263
1264 If on the other hand, we are creating an executable, we
1265 may need to keep relocations for symbols satisfied by a
1266 dynamic library if we manage to avoid copy relocs for the
1267 symbol. */
1268 if ((bfd_link_pic (info)
1269 && (sec->flags & SEC_ALLOC) != 0
1270 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1272 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1273 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1274 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1275 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1276 || (h != NULL
1277 && (! SYMBOLIC_BIND (info, h)
1278 || h->root.type == bfd_link_hash_defweak
1279 || !h->def_regular))))
1280 || (ELIMINATE_COPY_RELOCS
1281 && !bfd_link_pic (info)
1282 && (sec->flags & SEC_ALLOC) != 0
1283 && h != NULL
1284 && (h->root.type == bfd_link_hash_defweak
1285 || !h->def_regular)))
1286 {
1287 struct elf_dyn_relocs *p;
1288 struct elf_dyn_relocs **head;
1289
1290 /* We must copy these reloc types into the output file.
1291 Create a reloc section in dynobj and make room for
1292 this reloc. */
1293 if (sreloc == NULL)
1294 {
1295 if (htab->elf.dynobj == NULL)
1296 htab->elf.dynobj = abfd;
1297
1298 sreloc = _bfd_elf_make_dynamic_reloc_section
1299 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1300
1301 if (sreloc == NULL)
1302 return FALSE;
1303 }
1304
1305 /* If this is a global symbol, we count the number of
1306 relocations we need for this symbol. */
1307 if (h != NULL)
1308 {
1309 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1310 }
1311 else
1312 {
1313 /* Track dynamic relocs needed for local syms too.
1314 We really need local syms available to do this
1315 easily. Oh well. */
1316 asection *s;
1317 void *vpp;
1318
1319 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1320 abfd, r_symndx);
1321 if (isym == NULL)
1322 return FALSE;
1323
1324 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1325 if (s == NULL)
1326 s = sec;
1327
1328 vpp = &elf_section_data (s)->local_dynrel;
1329 head = (struct elf_dyn_relocs **) vpp;
1330 }
1331
1332 p = *head;
1333 if (p == NULL || p->sec != sec)
1334 {
1335 bfd_size_type amt = sizeof *p;
1336
1337 p = ((struct elf_dyn_relocs *)
1338 bfd_alloc (htab->elf.dynobj, amt));
1339 if (p == NULL)
1340 return FALSE;
1341 p->next = *head;
1342 *head = p;
1343 p->sec = sec;
1344 p->count = 0;
1345 p->pc_count = 0;
1346 }
1347
1348 p->count += 1;
1349 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1353 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1354 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1355 p->pc_count += 1;
1356 }
1357 break;
1358
1359 /* This relocation describes the C++ object vtable hierarchy.
1360 Reconstruct it for later use during GC. */
1361 case R_390_GNU_VTINHERIT:
1362 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1363 return FALSE;
1364 break;
1365
1366 /* This relocation describes which C++ vtable entries are actually
1367 used. Record for later use during GC. */
1368 case R_390_GNU_VTENTRY:
1369 BFD_ASSERT (h != NULL);
1370 if (h != NULL
1371 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1372 return FALSE;
1373 break;
1374
1375 default:
1376 break;
1377 }
1378 }
1379
1380 return TRUE;
1381 }
1382
1383 /* Return the section that should be marked against GC for a given
1384 relocation. */
1385
1386 static asection *
1387 elf_s390_gc_mark_hook (asection *sec,
1388 struct bfd_link_info *info,
1389 Elf_Internal_Rela *rel,
1390 struct elf_link_hash_entry *h,
1391 Elf_Internal_Sym *sym)
1392 {
1393 if (h != NULL)
1394 switch (ELF32_R_TYPE (rel->r_info))
1395 {
1396 case R_390_GNU_VTINHERIT:
1397 case R_390_GNU_VTENTRY:
1398 return NULL;
1399 }
1400 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1401
1402 }
1403
1404 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1405 entry but we found we will not create any. Called when we find we will
1406 not have any PLT for this symbol, by for example
1407 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1408 or elf_s390_size_dynamic_sections if no dynamic sections will be
1409 created (we're only linking static objects). */
1410
1411 static void
1412 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1413 {
1414 if (h->elf.root.type == bfd_link_hash_warning)
1415 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1416
1417 if (h->gotplt_refcount <= 0)
1418 return;
1419
1420 /* We simply add the number of gotplt references to the number
1421 * of got references for this symbol. */
1422 h->elf.got.refcount += h->gotplt_refcount;
1423 h->gotplt_refcount = -1;
1424 }
1425
1426 /* Adjust a symbol defined by a dynamic object and referenced by a
1427 regular object. The current definition is in some section of the
1428 dynamic object, but we're not including those sections. We have to
1429 change the definition to something the rest of the link can
1430 understand. */
1431
1432 static bfd_boolean
1433 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1434 struct elf_link_hash_entry *h)
1435 {
1436 struct elf_s390_link_hash_table *htab;
1437 asection *s, *srel;
1438
1439 /* STT_GNU_IFUNC symbol must go through PLT. */
1440 if (s390_is_ifunc_symbol_p (h))
1441 {
1442 /* All local STT_GNU_IFUNC references must be treated as local
1443 calls via local PLT. */
1444 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1445 {
1446 bfd_size_type pc_count = 0, count = 0;
1447 struct elf_dyn_relocs **pp;
1448 struct elf_s390_link_hash_entry *eh;
1449 struct elf_dyn_relocs *p;
1450
1451 eh = (struct elf_s390_link_hash_entry *) h;
1452 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1453 {
1454 pc_count += p->pc_count;
1455 p->count -= p->pc_count;
1456 p->pc_count = 0;
1457 count += p->count;
1458 if (p->count == 0)
1459 *pp = p->next;
1460 else
1461 pp = &p->next;
1462 }
1463
1464 if (pc_count || count)
1465 {
1466 h->needs_plt = 1;
1467 h->non_got_ref = 1;
1468 if (h->plt.refcount <= 0)
1469 h->plt.refcount = 1;
1470 else
1471 h->plt.refcount += 1;
1472 }
1473 }
1474
1475 if (h->plt.refcount <= 0)
1476 {
1477 h->plt.offset = (bfd_vma) -1;
1478 h->needs_plt = 0;
1479 }
1480 return TRUE;
1481 }
1482
1483 /* If this is a function, put it in the procedure linkage table. We
1484 will fill in the contents of the procedure linkage table later
1485 (although we could actually do it here). */
1486 if (h->type == STT_FUNC
1487 || h->needs_plt)
1488 {
1489 if (h->plt.refcount <= 0
1490 || SYMBOL_CALLS_LOCAL (info, h)
1491 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1492 && h->root.type != bfd_link_hash_undefweak))
1493 {
1494 /* This case can occur if we saw a PLT32 reloc in an input
1495 file, but the symbol was never referred to by a dynamic
1496 object, or if all references were garbage collected. In
1497 such a case, we don't actually need to build a procedure
1498 linkage table, and we can just do a PC32 reloc instead. */
1499 h->plt.offset = (bfd_vma) -1;
1500 h->needs_plt = 0;
1501 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1502 }
1503
1504 return TRUE;
1505 }
1506 else
1507 /* It's possible that we incorrectly decided a .plt reloc was
1508 needed for an R_390_PC32 reloc to a non-function sym in
1509 check_relocs. We can't decide accurately between function and
1510 non-function syms in check-relocs; Objects loaded later in
1511 the link may change h->type. So fix it now. */
1512 h->plt.offset = (bfd_vma) -1;
1513
1514 /* If this is a weak symbol, and there is a real definition, the
1515 processor independent code will have arranged for us to see the
1516 real definition first, and we can just use the same value. */
1517 if (h->u.weakdef != NULL)
1518 {
1519 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1520 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1521 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1522 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1523 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1524 h->non_got_ref = h->u.weakdef->non_got_ref;
1525 return TRUE;
1526 }
1527
1528 /* This is a reference to a symbol defined by a dynamic object which
1529 is not a function. */
1530
1531 /* If we are creating a shared library, we must presume that the
1532 only references to the symbol are via the global offset table.
1533 For such cases we need not do anything here; the relocations will
1534 be handled correctly by relocate_section. */
1535 if (bfd_link_pic (info))
1536 return TRUE;
1537
1538 /* If there are no references to this symbol that do not use the
1539 GOT, we don't need to generate a copy reloc. */
1540 if (!h->non_got_ref)
1541 return TRUE;
1542
1543 /* If -z nocopyreloc was given, we won't generate them either. */
1544 if (info->nocopyreloc)
1545 {
1546 h->non_got_ref = 0;
1547 return TRUE;
1548 }
1549
1550 if (ELIMINATE_COPY_RELOCS)
1551 {
1552 struct elf_s390_link_hash_entry * eh;
1553 struct elf_dyn_relocs *p;
1554
1555 eh = (struct elf_s390_link_hash_entry *) h;
1556 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1557 {
1558 s = p->sec->output_section;
1559 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1560 break;
1561 }
1562
1563 /* If we didn't find any dynamic relocs in read-only sections, then
1564 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1565 if (p == NULL)
1566 {
1567 h->non_got_ref = 0;
1568 return TRUE;
1569 }
1570 }
1571
1572 /* We must allocate the symbol in our .dynbss section, which will
1573 become part of the .bss section of the executable. There will be
1574 an entry for this symbol in the .dynsym section. The dynamic
1575 object will contain position independent code, so all references
1576 from the dynamic object to this symbol will go through the global
1577 offset table. The dynamic linker will use the .dynsym entry to
1578 determine the address it must put in the global offset table, so
1579 both the dynamic object and the regular object will refer to the
1580 same memory location for the variable. */
1581
1582 htab = elf_s390_hash_table (info);
1583
1584 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1585 copy the initial value out of the dynamic object and into the
1586 runtime process image. */
1587 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1588 {
1589 s = htab->elf.sdynrelro;
1590 srel = htab->elf.sreldynrelro;
1591 }
1592 else
1593 {
1594 s = htab->elf.sdynbss;
1595 srel = htab->elf.srelbss;
1596 }
1597 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1598 {
1599 srel->size += sizeof (Elf32_External_Rela);
1600 h->needs_copy = 1;
1601 }
1602
1603 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1604 }
1605
1606 /* Allocate space in .plt, .got and associated reloc sections for
1607 dynamic relocs. */
1608
1609 static bfd_boolean
1610 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1611 {
1612 struct bfd_link_info *info;
1613 struct elf_s390_link_hash_table *htab;
1614 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1615 struct elf_dyn_relocs *p;
1616
1617 if (h->root.type == bfd_link_hash_indirect)
1618 return TRUE;
1619
1620 info = (struct bfd_link_info *) inf;
1621 htab = elf_s390_hash_table (info);
1622
1623 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1624 here if it is defined and referenced in a non-shared object. */
1625 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1626 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1627 else if (htab->elf.dynamic_sections_created
1628 && h->plt.refcount > 0)
1629 {
1630 /* Make sure this symbol is output as a dynamic symbol.
1631 Undefined weak syms won't yet be marked as dynamic. */
1632 if (h->dynindx == -1
1633 && !h->forced_local)
1634 {
1635 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1636 return FALSE;
1637 }
1638
1639 if (bfd_link_pic (info)
1640 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1641 {
1642 asection *s = htab->elf.splt;
1643
1644 /* If this is the first .plt entry, make room for the special
1645 first entry. */
1646 if (s->size == 0)
1647 s->size += PLT_FIRST_ENTRY_SIZE;
1648
1649 h->plt.offset = s->size;
1650
1651 /* If this symbol is not defined in a regular file, and we are
1652 not generating a shared library, then set the symbol to this
1653 location in the .plt. This is required to make function
1654 pointers compare as equal between the normal executable and
1655 the shared library. */
1656 if (! bfd_link_pic (info)
1657 && !h->def_regular)
1658 {
1659 h->root.u.def.section = s;
1660 h->root.u.def.value = h->plt.offset;
1661 }
1662
1663 /* Make room for this entry. */
1664 s->size += PLT_ENTRY_SIZE;
1665
1666 /* We also need to make an entry in the .got.plt section, which
1667 will be placed in the .got section by the linker script. */
1668 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1669
1670 /* We also need to make an entry in the .rela.plt section. */
1671 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1672 }
1673 else
1674 {
1675 h->plt.offset = (bfd_vma) -1;
1676 h->needs_plt = 0;
1677 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1678 }
1679 }
1680 else
1681 {
1682 h->plt.offset = (bfd_vma) -1;
1683 h->needs_plt = 0;
1684 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1685 }
1686
1687 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1688 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1689 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1690 we can save the dynamic TLS relocation. */
1691 if (h->got.refcount > 0
1692 && !bfd_link_pic (info)
1693 && h->dynindx == -1
1694 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1695 {
1696 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1697 /* For the GOTIE access without a literal pool entry the offset has
1698 to be stored somewhere. The immediate value in the instruction
1699 is not bit enough so the value is stored in the got. */
1700 {
1701 h->got.offset = htab->elf.sgot->size;
1702 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1703 }
1704 else
1705 h->got.offset = (bfd_vma) -1;
1706 }
1707 else if (h->got.refcount > 0)
1708 {
1709 asection *s;
1710 bfd_boolean dyn;
1711 int tls_type = elf_s390_hash_entry(h)->tls_type;
1712
1713 /* Make sure this symbol is output as a dynamic symbol.
1714 Undefined weak syms won't yet be marked as dynamic. */
1715 if (h->dynindx == -1
1716 && !h->forced_local)
1717 {
1718 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1719 return FALSE;
1720 }
1721
1722 s = htab->elf.sgot;
1723 h->got.offset = s->size;
1724 s->size += GOT_ENTRY_SIZE;
1725 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1726 if (tls_type == GOT_TLS_GD)
1727 s->size += GOT_ENTRY_SIZE;
1728 dyn = htab->elf.dynamic_sections_created;
1729 /* R_390_TLS_IE32 needs one dynamic relocation,
1730 R_390_TLS_GD32 needs one if local symbol and two if global. */
1731 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1732 || tls_type >= GOT_TLS_IE)
1733 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1734 else if (tls_type == GOT_TLS_GD)
1735 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1736 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1737 || h->root.type != bfd_link_hash_undefweak)
1738 && (bfd_link_pic (info)
1739 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1740 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1741 }
1742 else
1743 h->got.offset = (bfd_vma) -1;
1744
1745 if (eh->dyn_relocs == NULL)
1746 return TRUE;
1747
1748 /* In the shared -Bsymbolic case, discard space allocated for
1749 dynamic pc-relative relocs against symbols which turn out to be
1750 defined in regular objects. For the normal shared case, discard
1751 space for pc-relative relocs that have become local due to symbol
1752 visibility changes. */
1753
1754 if (bfd_link_pic (info))
1755 {
1756 if (SYMBOL_CALLS_LOCAL (info, h))
1757 {
1758 struct elf_dyn_relocs **pp;
1759
1760 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1761 {
1762 p->count -= p->pc_count;
1763 p->pc_count = 0;
1764 if (p->count == 0)
1765 *pp = p->next;
1766 else
1767 pp = &p->next;
1768 }
1769 }
1770
1771 /* Also discard relocs on undefined weak syms with non-default
1772 visibility. */
1773 if (eh->dyn_relocs != NULL
1774 && h->root.type == bfd_link_hash_undefweak)
1775 {
1776 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1777 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1778 eh->dyn_relocs = NULL;
1779
1780 /* Make sure undefined weak symbols are output as a dynamic
1781 symbol in PIEs. */
1782 else if (h->dynindx == -1
1783 && !h->forced_local)
1784 {
1785 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1786 return FALSE;
1787 }
1788 }
1789 }
1790 else if (ELIMINATE_COPY_RELOCS)
1791 {
1792 /* For the non-shared case, discard space for relocs against
1793 symbols which turn out to need copy relocs or are not
1794 dynamic. */
1795
1796 if (!h->non_got_ref
1797 && ((h->def_dynamic
1798 && !h->def_regular)
1799 || (htab->elf.dynamic_sections_created
1800 && (h->root.type == bfd_link_hash_undefweak
1801 || h->root.type == bfd_link_hash_undefined))))
1802 {
1803 /* Make sure this symbol is output as a dynamic symbol.
1804 Undefined weak syms won't yet be marked as dynamic. */
1805 if (h->dynindx == -1
1806 && !h->forced_local)
1807 {
1808 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1809 return FALSE;
1810 }
1811
1812 /* If that succeeded, we know we'll be keeping all the
1813 relocs. */
1814 if (h->dynindx != -1)
1815 goto keep;
1816 }
1817
1818 eh->dyn_relocs = NULL;
1819
1820 keep: ;
1821 }
1822
1823 /* Finally, allocate space. */
1824 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1825 {
1826 asection *sreloc = elf_section_data (p->sec)->sreloc;
1827
1828 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1829 }
1830
1831 return TRUE;
1832 }
1833
1834 /* Find any dynamic relocs that apply to read-only sections. */
1835
1836 static bfd_boolean
1837 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1838 {
1839 struct elf_s390_link_hash_entry *eh;
1840 struct elf_dyn_relocs *p;
1841
1842 eh = (struct elf_s390_link_hash_entry *) h;
1843 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1844 {
1845 asection *s = p->sec->output_section;
1846
1847 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1848 {
1849 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1850
1851 info->flags |= DF_TEXTREL;
1852
1853 /* Not an error, just cut short the traversal. */
1854 return FALSE;
1855 }
1856 }
1857 return TRUE;
1858 }
1859
1860 /* Set the sizes of the dynamic sections. */
1861
1862 static bfd_boolean
1863 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1864 struct bfd_link_info *info)
1865 {
1866 struct elf_s390_link_hash_table *htab;
1867 bfd *dynobj;
1868 asection *s;
1869 bfd_boolean relocs;
1870 bfd *ibfd;
1871
1872 htab = elf_s390_hash_table (info);
1873 dynobj = htab->elf.dynobj;
1874 if (dynobj == NULL)
1875 abort ();
1876
1877 if (htab->elf.dynamic_sections_created)
1878 {
1879 /* Set the contents of the .interp section to the interpreter. */
1880 if (bfd_link_executable (info) && !info->nointerp)
1881 {
1882 s = bfd_get_linker_section (dynobj, ".interp");
1883 if (s == NULL)
1884 abort ();
1885 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1886 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1887 }
1888 }
1889
1890 /* Set up .got offsets for local syms, and space for local dynamic
1891 relocs. */
1892 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1893 {
1894 bfd_signed_vma *local_got;
1895 bfd_signed_vma *end_local_got;
1896 char *local_tls_type;
1897 bfd_size_type locsymcount;
1898 Elf_Internal_Shdr *symtab_hdr;
1899 asection *srela;
1900 struct plt_entry *local_plt;
1901 unsigned int i;
1902
1903 if (! is_s390_elf (ibfd))
1904 continue;
1905
1906 for (s = ibfd->sections; s != NULL; s = s->next)
1907 {
1908 struct elf_dyn_relocs *p;
1909
1910 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1911 {
1912 if (!bfd_is_abs_section (p->sec)
1913 && bfd_is_abs_section (p->sec->output_section))
1914 {
1915 /* Input section has been discarded, either because
1916 it is a copy of a linkonce section or due to
1917 linker script /DISCARD/, so we'll be discarding
1918 the relocs too. */
1919 }
1920 else if (p->count != 0)
1921 {
1922 srela = elf_section_data (p->sec)->sreloc;
1923 srela->size += p->count * sizeof (Elf32_External_Rela);
1924 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1925 info->flags |= DF_TEXTREL;
1926 }
1927 }
1928 }
1929
1930 local_got = elf_local_got_refcounts (ibfd);
1931 if (!local_got)
1932 continue;
1933
1934 symtab_hdr = &elf_symtab_hdr (ibfd);
1935 locsymcount = symtab_hdr->sh_info;
1936 end_local_got = local_got + locsymcount;
1937 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1938 s = htab->elf.sgot;
1939 srela = htab->elf.srelgot;
1940 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1941 {
1942 if (*local_got > 0)
1943 {
1944 *local_got = s->size;
1945 s->size += GOT_ENTRY_SIZE;
1946 if (*local_tls_type == GOT_TLS_GD)
1947 s->size += GOT_ENTRY_SIZE;
1948 if (bfd_link_pic (info))
1949 srela->size += sizeof (Elf32_External_Rela);
1950 }
1951 else
1952 *local_got = (bfd_vma) -1;
1953 }
1954 local_plt = elf_s390_local_plt (ibfd);
1955 for (i = 0; i < symtab_hdr->sh_info; i++)
1956 {
1957 if (local_plt[i].plt.refcount > 0)
1958 {
1959 local_plt[i].plt.offset = htab->elf.iplt->size;
1960 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1961 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1962 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1963 }
1964 else
1965 local_plt[i].plt.offset = (bfd_vma) -1;
1966 }
1967 }
1968
1969 if (htab->tls_ldm_got.refcount > 0)
1970 {
1971 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1972 relocs. */
1973 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1974 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1975 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1976 }
1977 else
1978 htab->tls_ldm_got.offset = -1;
1979
1980 /* Allocate global sym .plt and .got entries, and space for global
1981 sym dynamic relocs. */
1982 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1983
1984 /* We now have determined the sizes of the various dynamic sections.
1985 Allocate memory for them. */
1986 relocs = FALSE;
1987 for (s = dynobj->sections; s != NULL; s = s->next)
1988 {
1989 if ((s->flags & SEC_LINKER_CREATED) == 0)
1990 continue;
1991
1992 if (s == htab->elf.splt
1993 || s == htab->elf.sgot
1994 || s == htab->elf.sgotplt
1995 || s == htab->elf.sdynbss
1996 || s == htab->elf.sdynrelro
1997 || s == htab->elf.iplt
1998 || s == htab->elf.igotplt
1999 || s == htab->irelifunc)
2000 {
2001 /* Strip this section if we don't need it; see the
2002 comment below. */
2003 }
2004 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2005 {
2006 if (s->size != 0)
2007 relocs = TRUE;
2008
2009 /* We use the reloc_count field as a counter if we need
2010 to copy relocs into the output file. */
2011 s->reloc_count = 0;
2012 }
2013 else
2014 {
2015 /* It's not one of our sections, so don't allocate space. */
2016 continue;
2017 }
2018
2019 if (s->size == 0)
2020 {
2021 /* If we don't need this section, strip it from the
2022 output file. This is to handle .rela.bss and
2023 .rela.plt. We must create it in
2024 create_dynamic_sections, because it must be created
2025 before the linker maps input sections to output
2026 sections. The linker does that before
2027 adjust_dynamic_symbol is called, and it is that
2028 function which decides whether anything needs to go
2029 into these sections. */
2030
2031 s->flags |= SEC_EXCLUDE;
2032 continue;
2033 }
2034
2035 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2036 continue;
2037
2038 /* Allocate memory for the section contents. We use bfd_zalloc
2039 here in case unused entries are not reclaimed before the
2040 section's contents are written out. This should not happen,
2041 but this way if it does, we get a R_390_NONE reloc instead
2042 of garbage. */
2043 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2044 if (s->contents == NULL)
2045 return FALSE;
2046 }
2047
2048 if (htab->elf.dynamic_sections_created)
2049 {
2050 /* Add some entries to the .dynamic section. We fill in the
2051 values later, in elf_s390_finish_dynamic_sections, but we
2052 must add the entries now so that we get the correct size for
2053 the .dynamic section. The DT_DEBUG entry is filled in by the
2054 dynamic linker and used by the debugger. */
2055 #define add_dynamic_entry(TAG, VAL) \
2056 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2057
2058 if (bfd_link_executable (info))
2059 {
2060 if (!add_dynamic_entry (DT_DEBUG, 0))
2061 return FALSE;
2062 }
2063
2064 if (htab->elf.splt->size != 0)
2065 {
2066 if (!add_dynamic_entry (DT_PLTGOT, 0)
2067 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2068 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2069 || !add_dynamic_entry (DT_JMPREL, 0))
2070 return FALSE;
2071 }
2072
2073 if (relocs)
2074 {
2075 if (!add_dynamic_entry (DT_RELA, 0)
2076 || !add_dynamic_entry (DT_RELASZ, 0)
2077 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2078 return FALSE;
2079
2080 /* If any dynamic relocs apply to a read-only section,
2081 then we need a DT_TEXTREL entry. */
2082 if ((info->flags & DF_TEXTREL) == 0)
2083 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2084
2085 if ((info->flags & DF_TEXTREL) != 0)
2086 {
2087 if (!add_dynamic_entry (DT_TEXTREL, 0))
2088 return FALSE;
2089 }
2090 }
2091 }
2092 #undef add_dynamic_entry
2093
2094 return TRUE;
2095 }
2096
2097 /* Return the base VMA address which should be subtracted from real addresses
2098 when resolving @dtpoff relocation.
2099 This is PT_TLS segment p_vaddr. */
2100
2101 static bfd_vma
2102 dtpoff_base (struct bfd_link_info *info)
2103 {
2104 /* If tls_sec is NULL, we should have signalled an error already. */
2105 if (elf_hash_table (info)->tls_sec == NULL)
2106 return 0;
2107 return elf_hash_table (info)->tls_sec->vma;
2108 }
2109
2110 /* Return the relocation value for @tpoff relocation
2111 if STT_TLS virtual address is ADDRESS. */
2112
2113 static bfd_vma
2114 tpoff (struct bfd_link_info *info, bfd_vma address)
2115 {
2116 struct elf_link_hash_table *htab = elf_hash_table (info);
2117
2118 /* If tls_sec is NULL, we should have signalled an error already. */
2119 if (htab->tls_sec == NULL)
2120 return 0;
2121 return htab->tls_size + htab->tls_sec->vma - address;
2122 }
2123
2124 /* Complain if TLS instruction relocation is against an invalid
2125 instruction. */
2126
2127 static void
2128 invalid_tls_insn (bfd *input_bfd,
2129 asection *input_section,
2130 Elf_Internal_Rela *rel)
2131 {
2132 reloc_howto_type *howto;
2133
2134 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2135 _bfd_error_handler
2136 /* xgettext:c-format */
2137 (_("%B(%A+%#Lx): invalid instruction for TLS relocation %s"),
2138 input_bfd,
2139 input_section,
2140 rel->r_offset,
2141 howto->name);
2142 bfd_set_error (bfd_error_bad_value);
2143 }
2144
2145 /* Relocate a 390 ELF section. */
2146
2147 static bfd_boolean
2148 elf_s390_relocate_section (bfd *output_bfd,
2149 struct bfd_link_info *info,
2150 bfd *input_bfd,
2151 asection *input_section,
2152 bfd_byte *contents,
2153 Elf_Internal_Rela *relocs,
2154 Elf_Internal_Sym *local_syms,
2155 asection **local_sections)
2156 {
2157 struct elf_s390_link_hash_table *htab;
2158 Elf_Internal_Shdr *symtab_hdr;
2159 struct elf_link_hash_entry **sym_hashes;
2160 bfd_vma *local_got_offsets;
2161 Elf_Internal_Rela *rel;
2162 Elf_Internal_Rela *relend;
2163
2164 BFD_ASSERT (is_s390_elf (input_bfd));
2165
2166 htab = elf_s390_hash_table (info);
2167 symtab_hdr = &elf_symtab_hdr (input_bfd);
2168 sym_hashes = elf_sym_hashes (input_bfd);
2169 local_got_offsets = elf_local_got_offsets (input_bfd);
2170
2171 rel = relocs;
2172 relend = relocs + input_section->reloc_count;
2173 for (; rel < relend; rel++)
2174 {
2175 unsigned int r_type;
2176 reloc_howto_type *howto;
2177 unsigned long r_symndx;
2178 struct elf_link_hash_entry *h;
2179 Elf_Internal_Sym *sym;
2180 asection *sec;
2181 bfd_vma off;
2182 bfd_vma relocation;
2183 bfd_boolean unresolved_reloc;
2184 bfd_reloc_status_type r;
2185 int tls_type;
2186 asection *base_got = htab->elf.sgot;
2187 bfd_boolean resolved_to_zero;
2188
2189 r_type = ELF32_R_TYPE (rel->r_info);
2190 if (r_type == (int) R_390_GNU_VTINHERIT
2191 || r_type == (int) R_390_GNU_VTENTRY)
2192 continue;
2193 if (r_type >= (int) R_390_max)
2194 {
2195 bfd_set_error (bfd_error_bad_value);
2196 return FALSE;
2197 }
2198
2199 howto = elf_howto_table + r_type;
2200 r_symndx = ELF32_R_SYM (rel->r_info);
2201
2202 h = NULL;
2203 sym = NULL;
2204 sec = NULL;
2205 unresolved_reloc = FALSE;
2206 if (r_symndx < symtab_hdr->sh_info)
2207 {
2208 sym = local_syms + r_symndx;
2209 sec = local_sections[r_symndx];
2210 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2211 {
2212 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2213 if (local_plt == NULL)
2214 return FALSE;
2215
2216 /* Address of the PLT slot. */
2217 relocation = (htab->elf.iplt->output_section->vma
2218 + htab->elf.iplt->output_offset
2219 + local_plt[r_symndx].plt.offset);
2220
2221 switch (r_type)
2222 {
2223 case R_390_PLTOFF16:
2224 case R_390_PLTOFF32:
2225 relocation -= htab->elf.sgot->output_section->vma;
2226 break;
2227 case R_390_GOTPLT12:
2228 case R_390_GOTPLT16:
2229 case R_390_GOTPLT20:
2230 case R_390_GOTPLT32:
2231 case R_390_GOTPLTENT:
2232 case R_390_GOT12:
2233 case R_390_GOT16:
2234 case R_390_GOT20:
2235 case R_390_GOT32:
2236 case R_390_GOTENT:
2237 {
2238 /* Write the PLT slot address into the GOT slot. */
2239 bfd_put_32 (output_bfd, relocation,
2240 htab->elf.sgot->contents +
2241 local_got_offsets[r_symndx]);
2242 relocation = (local_got_offsets[r_symndx] +
2243 htab->elf.sgot->output_offset);
2244
2245 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2246 relocation += htab->elf.sgot->output_section->vma;
2247 break;
2248 }
2249 default:
2250 break;
2251 }
2252 /* The output section is needed later in
2253 finish_dynamic_section when creating the dynamic
2254 relocation. */
2255 local_plt[r_symndx].sec = sec;
2256 goto do_relocation;
2257 }
2258 else
2259 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2260 }
2261 else
2262 {
2263 bfd_boolean warned ATTRIBUTE_UNUSED;
2264 bfd_boolean ignored ATTRIBUTE_UNUSED;
2265
2266 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2267 r_symndx, symtab_hdr, sym_hashes,
2268 h, sec, relocation,
2269 unresolved_reloc, warned, ignored);
2270 }
2271
2272 if (sec != NULL && discarded_section (sec))
2273 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2274 rel, 1, relend, howto, 0, contents);
2275
2276 if (bfd_link_relocatable (info))
2277 continue;
2278
2279 resolved_to_zero = (h != NULL
2280 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2281
2282 switch (r_type)
2283 {
2284 case R_390_GOTPLT12:
2285 case R_390_GOTPLT16:
2286 case R_390_GOTPLT20:
2287 case R_390_GOTPLT32:
2288 case R_390_GOTPLTENT:
2289 /* There are three cases for a GOTPLT relocation. 1) The
2290 relocation is against the jump slot entry of a plt that
2291 will get emitted to the output file. 2) The relocation
2292 is against the jump slot of a plt entry that has been
2293 removed. elf_s390_adjust_gotplt has created a GOT entry
2294 as replacement. 3) The relocation is against a local symbol.
2295 Cases 2) and 3) are the same as the GOT relocation code
2296 so we just have to test for case 1 and fall through for
2297 the other two. */
2298 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2299 {
2300 bfd_vma plt_index;
2301
2302 if (s390_is_ifunc_symbol_p (h))
2303 {
2304 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2305 relocation = (plt_index * GOT_ENTRY_SIZE +
2306 htab->elf.igotplt->output_offset);
2307 if (r_type == R_390_GOTPLTENT)
2308 relocation += htab->elf.igotplt->output_section->vma;
2309 }
2310 else
2311 {
2312 /* Calc. index no.
2313 Current offset - size first entry / entry size. */
2314 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2315 PLT_ENTRY_SIZE;
2316
2317 /* Offset in GOT is PLT index plus GOT headers(3)
2318 times 4, addr & GOT addr. */
2319 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2320 if (r_type == R_390_GOTPLTENT)
2321 relocation += htab->elf.sgot->output_section->vma;
2322 }
2323 unresolved_reloc = FALSE;
2324
2325 }
2326 /* Fall through. */
2327
2328 case R_390_GOT12:
2329 case R_390_GOT16:
2330 case R_390_GOT20:
2331 case R_390_GOT32:
2332 case R_390_GOTENT:
2333 /* Relocation is to the entry for this symbol in the global
2334 offset table. */
2335 if (base_got == NULL)
2336 abort ();
2337
2338 if (h != NULL)
2339 {
2340 bfd_boolean dyn;
2341
2342 off = h->got.offset;
2343 dyn = htab->elf.dynamic_sections_created;
2344
2345 if (s390_is_ifunc_symbol_p (h))
2346 {
2347 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2348 if (off == (bfd_vma)-1)
2349 {
2350 /* No explicit GOT usage so redirect to the
2351 got.iplt slot. */
2352 base_got = htab->elf.igotplt;
2353 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2354 }
2355 else
2356 {
2357 /* Explicit GOT slots must contain the address
2358 of the PLT slot. This will be handled in
2359 finish_dynamic_symbol. */
2360 }
2361 }
2362 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2363 bfd_link_pic (info),
2364 h)
2365 || (bfd_link_pic (info)
2366 && SYMBOL_REFERENCES_LOCAL (info, h))
2367 || (ELF_ST_VISIBILITY (h->other)
2368 && h->root.type == bfd_link_hash_undefweak))
2369
2370 {
2371 /* This is actually a static link, or it is a
2372 -Bsymbolic link and the symbol is defined
2373 locally, or the symbol was forced to be local
2374 because of a version file. We must initialize
2375 this entry in the global offset table. Since the
2376 offset must always be a multiple of 2, we use the
2377 least significant bit to record whether we have
2378 initialized it already.
2379
2380 When doing a dynamic link, we create a .rel.got
2381 relocation entry to initialize the value. This
2382 is done in the finish_dynamic_symbol routine. */
2383 if ((off & 1) != 0)
2384 off &= ~1;
2385 else
2386 {
2387 bfd_put_32 (output_bfd, relocation,
2388 base_got->contents + off);
2389 h->got.offset |= 1;
2390 }
2391
2392 if ((h->def_regular
2393 && bfd_link_pic (info)
2394 && SYMBOL_REFERENCES_LOCAL (info, h))
2395 /* lrl rx,sym@GOTENT -> larl rx, sym */
2396 && ((r_type == R_390_GOTENT
2397 && (bfd_get_16 (input_bfd,
2398 contents + rel->r_offset - 2)
2399 & 0xff0f) == 0xc40d)
2400 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2401 || (r_type == R_390_GOT20
2402 && (bfd_get_32 (input_bfd,
2403 contents + rel->r_offset - 2)
2404 & 0xff00f000) == 0xe300c000
2405 && bfd_get_8 (input_bfd,
2406 contents + rel->r_offset + 3) == 0x58)))
2407 {
2408 unsigned short new_insn =
2409 (0xc000 | (bfd_get_8 (input_bfd,
2410 contents + rel->r_offset - 1) & 0xf0));
2411 bfd_put_16 (output_bfd, new_insn,
2412 contents + rel->r_offset - 2);
2413 r_type = R_390_PC32DBL;
2414 rel->r_addend = 2;
2415 howto = elf_howto_table + r_type;
2416 relocation = h->root.u.def.value
2417 + h->root.u.def.section->output_section->vma
2418 + h->root.u.def.section->output_offset;
2419 goto do_relocation;
2420 }
2421 }
2422 else
2423 unresolved_reloc = FALSE;
2424 }
2425 else
2426 {
2427 if (local_got_offsets == NULL)
2428 abort ();
2429
2430 off = local_got_offsets[r_symndx];
2431
2432 /* The offset must always be a multiple of 4. We use
2433 the least significant bit to record whether we have
2434 already generated the necessary reloc. */
2435 if ((off & 1) != 0)
2436 off &= ~1;
2437 else
2438 {
2439 bfd_put_32 (output_bfd, relocation,
2440 htab->elf.sgot->contents + off);
2441
2442 if (bfd_link_pic (info))
2443 {
2444 asection *srelgot;
2445 Elf_Internal_Rela outrel;
2446 bfd_byte *loc;
2447
2448 srelgot = htab->elf.srelgot;
2449 if (srelgot == NULL)
2450 abort ();
2451
2452 outrel.r_offset = (htab->elf.sgot->output_section->vma
2453 + htab->elf.sgot->output_offset
2454 + off);
2455 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2456 outrel.r_addend = relocation;
2457 loc = srelgot->contents;
2458 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2459 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2460 }
2461
2462 local_got_offsets[r_symndx] |= 1;
2463 }
2464 }
2465
2466 if (off >= (bfd_vma) -2)
2467 abort ();
2468
2469 relocation = base_got->output_offset + off;
2470
2471 /* For @GOTENT the relocation is against the offset between
2472 the instruction and the symbols entry in the GOT and not
2473 between the start of the GOT and the symbols entry. We
2474 add the vma of the GOT to get the correct value. */
2475 if ( r_type == R_390_GOTENT
2476 || r_type == R_390_GOTPLTENT)
2477 relocation += base_got->output_section->vma;
2478
2479 break;
2480
2481 case R_390_GOTOFF16:
2482 case R_390_GOTOFF32:
2483 /* Relocation is relative to the start of the global offset
2484 table. */
2485
2486 if (h != NULL
2487 && s390_is_ifunc_symbol_p (h)
2488 && h->def_regular
2489 && !bfd_link_executable (info))
2490 {
2491 relocation = (htab->elf.iplt->output_section->vma
2492 + htab->elf.iplt->output_offset
2493 + h->plt.offset
2494 - htab->elf.sgot->output_section->vma);
2495 goto do_relocation;
2496 }
2497
2498 /* Note that sgot->output_offset is not involved in this
2499 calculation. We always want the start of .got. If we
2500 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2501 permitted by the ABI, we might have to change this
2502 calculation. */
2503 relocation -= htab->elf.sgot->output_section->vma;
2504 break;
2505
2506 case R_390_GOTPC:
2507 case R_390_GOTPCDBL:
2508 /* Use global offset table as symbol value. */
2509 relocation = htab->elf.sgot->output_section->vma;
2510 unresolved_reloc = FALSE;
2511 break;
2512
2513 case R_390_PLT12DBL:
2514 case R_390_PLT16DBL:
2515 case R_390_PLT24DBL:
2516 case R_390_PLT32DBL:
2517 case R_390_PLT32:
2518 /* Relocation is to the entry for this symbol in the
2519 procedure linkage table. */
2520
2521 /* Resolve a PLT32 reloc against a local symbol directly,
2522 without using the procedure linkage table. */
2523 if (h == NULL)
2524 break;
2525
2526 if (h->plt.offset == (bfd_vma) -1
2527 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2528 {
2529 /* We didn't make a PLT entry for this symbol. This
2530 happens when statically linking PIC code, or when
2531 using -Bsymbolic. */
2532 break;
2533 }
2534
2535 if (s390_is_ifunc_symbol_p (h))
2536 relocation = (htab->elf.iplt->output_section->vma
2537 + htab->elf.iplt->output_offset
2538 + h->plt.offset);
2539 else
2540 relocation = (htab->elf.splt->output_section->vma
2541 + htab->elf.splt->output_offset
2542 + h->plt.offset);
2543 unresolved_reloc = FALSE;
2544 break;
2545
2546 case R_390_PLTOFF16:
2547 case R_390_PLTOFF32:
2548 /* Relocation is to the entry for this symbol in the
2549 procedure linkage table relative to the start of the GOT. */
2550
2551 /* For local symbols or if we didn't make a PLT entry for
2552 this symbol resolve the symbol directly. */
2553 if (h == NULL
2554 || h->plt.offset == (bfd_vma) -1
2555 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2556 {
2557 relocation -= htab->elf.sgot->output_section->vma;
2558 break;
2559 }
2560
2561 if (s390_is_ifunc_symbol_p (h))
2562 relocation = (htab->elf.iplt->output_section->vma
2563 + htab->elf.iplt->output_offset
2564 + h->plt.offset
2565 - htab->elf.sgot->output_section->vma);
2566 else
2567 relocation = (htab->elf.splt->output_section->vma
2568 + htab->elf.splt->output_offset
2569 + h->plt.offset
2570 - htab->elf.sgot->output_section->vma);
2571 unresolved_reloc = FALSE;
2572 break;
2573
2574 case R_390_PC16:
2575 case R_390_PC12DBL:
2576 case R_390_PC16DBL:
2577 case R_390_PC24DBL:
2578 case R_390_PC32DBL:
2579 case R_390_PC32:
2580 if (h != NULL
2581 && s390_is_ifunc_symbol_p (h)
2582 && h->def_regular
2583 && !bfd_link_executable (info))
2584 {
2585 /* This will not work our if the function does not
2586 happen to set up the GOT pointer for some other
2587 reason. 31 bit PLT entries require r12 to hold the
2588 GOT pointer.
2589 FIXME: Implement an errorcheck.
2590 NOTE: It will work when brasl is not available
2591 (e.g. with -m31 -march=g5) since a local function
2592 call then does use GOTOFF which implies r12 being set
2593 up. */
2594 relocation = (htab->elf.iplt->output_section->vma
2595 + htab->elf.iplt->output_offset
2596 + h ->plt.offset);
2597 goto do_relocation;
2598 }
2599 /* Fall through. */
2600
2601 case R_390_8:
2602 case R_390_16:
2603 case R_390_32:
2604 if (h != NULL
2605 && s390_is_ifunc_symbol_p (h)
2606 && h->def_regular)
2607 {
2608 if (!bfd_link_pic (info))
2609 {
2610 /* For a non-shared object STT_GNU_IFUNC symbol must
2611 go through PLT. */
2612 relocation = (htab->elf.iplt->output_section->vma
2613 + htab->elf.iplt->output_offset
2614 + h ->plt.offset);
2615 goto do_relocation;
2616 }
2617 else
2618 {
2619 /* For shared objects a runtime relocation is needed. */
2620
2621 Elf_Internal_Rela outrel;
2622 asection *sreloc;
2623
2624 /* Need a dynamic relocation to get the real function
2625 address. */
2626 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2627 info,
2628 input_section,
2629 rel->r_offset);
2630 if (outrel.r_offset == (bfd_vma) -1
2631 || outrel.r_offset == (bfd_vma) -2)
2632 abort ();
2633
2634 outrel.r_offset += (input_section->output_section->vma
2635 + input_section->output_offset);
2636
2637 if (h->dynindx == -1
2638 || h->forced_local
2639 || bfd_link_executable (info))
2640 {
2641 /* This symbol is resolved locally. */
2642 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2643 outrel.r_addend = (h->root.u.def.value
2644 + h->root.u.def.section->output_section->vma
2645 + h->root.u.def.section->output_offset);
2646 }
2647 else
2648 {
2649 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2650 outrel.r_addend = 0;
2651 }
2652
2653 sreloc = htab->elf.irelifunc;
2654 elf_append_rela (output_bfd, sreloc, &outrel);
2655
2656 /* If this reloc is against an external symbol, we
2657 do not want to fiddle with the addend. Otherwise,
2658 we need to include the symbol value so that it
2659 becomes an addend for the dynamic reloc. For an
2660 internal symbol, we have updated addend. */
2661 continue;
2662 }
2663 }
2664
2665 if ((input_section->flags & SEC_ALLOC) == 0)
2666 break;
2667
2668 if ((bfd_link_pic (info)
2669 && (h == NULL
2670 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2671 && !resolved_to_zero)
2672 || h->root.type != bfd_link_hash_undefweak)
2673 && ((r_type != R_390_PC16
2674 && r_type != R_390_PC12DBL
2675 && r_type != R_390_PC16DBL
2676 && r_type != R_390_PC24DBL
2677 && r_type != R_390_PC32DBL
2678 && r_type != R_390_PC32)
2679 || !SYMBOL_CALLS_LOCAL (info, h)))
2680 || (ELIMINATE_COPY_RELOCS
2681 && !bfd_link_pic (info)
2682 && h != NULL
2683 && h->dynindx != -1
2684 && !h->non_got_ref
2685 && ((h->def_dynamic
2686 && !h->def_regular)
2687 || h->root.type == bfd_link_hash_undefweak
2688 || h->root.type == bfd_link_hash_undefined)))
2689 {
2690 Elf_Internal_Rela outrel;
2691 bfd_boolean skip, relocate;
2692 asection *sreloc;
2693 bfd_byte *loc;
2694
2695 /* When generating a shared object, these relocations
2696 are copied into the output file to be resolved at run
2697 time. */
2698
2699 skip = FALSE;
2700 relocate = FALSE;
2701
2702 outrel.r_offset =
2703 _bfd_elf_section_offset (output_bfd, info, input_section,
2704 rel->r_offset);
2705 if (outrel.r_offset == (bfd_vma) -1)
2706 skip = TRUE;
2707 else if (outrel.r_offset == (bfd_vma) -2)
2708 skip = TRUE, relocate = TRUE;
2709 outrel.r_offset += (input_section->output_section->vma
2710 + input_section->output_offset);
2711
2712 if (skip)
2713 memset (&outrel, 0, sizeof outrel);
2714 else if (h != NULL
2715 && h->dynindx != -1
2716 && (r_type == R_390_PC16
2717 || r_type == R_390_PC12DBL
2718 || r_type == R_390_PC16DBL
2719 || r_type == R_390_PC24DBL
2720 || r_type == R_390_PC32DBL
2721 || r_type == R_390_PC32
2722 || !bfd_link_pic (info)
2723 || !SYMBOLIC_BIND (info, h)
2724 || !h->def_regular))
2725 {
2726 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2727 outrel.r_addend = rel->r_addend;
2728 }
2729 else
2730 {
2731 /* This symbol is local, or marked to become local. */
2732 outrel.r_addend = relocation + rel->r_addend;
2733 if (r_type == R_390_32)
2734 {
2735 relocate = TRUE;
2736 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2737 }
2738 else
2739 {
2740 long sindx;
2741
2742 if (bfd_is_abs_section (sec))
2743 sindx = 0;
2744 else if (sec == NULL || sec->owner == NULL)
2745 {
2746 bfd_set_error(bfd_error_bad_value);
2747 return FALSE;
2748 }
2749 else
2750 {
2751 asection *osec;
2752
2753 osec = sec->output_section;
2754 sindx = elf_section_data (osec)->dynindx;
2755 if (sindx == 0)
2756 {
2757 osec = htab->elf.text_index_section;
2758 sindx = elf_section_data (osec)->dynindx;
2759 }
2760 BFD_ASSERT (sindx != 0);
2761
2762 /* We are turning this relocation into one
2763 against a section symbol, so subtract out
2764 the output section's address but not the
2765 offset of the input section in the output
2766 section. */
2767 outrel.r_addend -= osec->vma;
2768 }
2769 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2770 }
2771 }
2772
2773 sreloc = elf_section_data (input_section)->sreloc;
2774 if (sreloc == NULL)
2775 abort ();
2776
2777 loc = sreloc->contents;
2778 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2779 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2780
2781 /* If this reloc is against an external symbol, we do
2782 not want to fiddle with the addend. Otherwise, we
2783 need to include the symbol value so that it becomes
2784 an addend for the dynamic reloc. */
2785 if (! relocate)
2786 continue;
2787 }
2788 break;
2789
2790 /* Relocations for tls literal pool entries. */
2791 case R_390_TLS_IE32:
2792 if (bfd_link_pic (info))
2793 {
2794 Elf_Internal_Rela outrel;
2795 asection *sreloc;
2796 bfd_byte *loc;
2797
2798 outrel.r_offset = rel->r_offset
2799 + input_section->output_section->vma
2800 + input_section->output_offset;
2801 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2802 sreloc = elf_section_data (input_section)->sreloc;
2803 if (sreloc == NULL)
2804 abort ();
2805 loc = sreloc->contents;
2806 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2807 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2808 }
2809 /* Fall through. */
2810
2811 case R_390_TLS_GD32:
2812 case R_390_TLS_GOTIE32:
2813 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2814 tls_type = GOT_UNKNOWN;
2815 if (h == NULL && local_got_offsets)
2816 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2817 else if (h != NULL)
2818 {
2819 tls_type = elf_s390_hash_entry(h)->tls_type;
2820 if (!bfd_link_pic (info)
2821 && h->dynindx == -1
2822 && tls_type >= GOT_TLS_IE)
2823 r_type = R_390_TLS_LE32;
2824 }
2825 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2826 r_type = R_390_TLS_IE32;
2827
2828 if (r_type == R_390_TLS_LE32)
2829 {
2830 /* This relocation gets optimized away by the local exec
2831 access optimization. */
2832 BFD_ASSERT (! unresolved_reloc);
2833 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2834 contents + rel->r_offset);
2835 continue;
2836 }
2837
2838 if (htab->elf.sgot == NULL)
2839 abort ();
2840
2841 if (h != NULL)
2842 off = h->got.offset;
2843 else
2844 {
2845 if (local_got_offsets == NULL)
2846 abort ();
2847
2848 off = local_got_offsets[r_symndx];
2849 }
2850
2851 emit_tls_relocs:
2852
2853 if ((off & 1) != 0)
2854 off &= ~1;
2855 else
2856 {
2857 Elf_Internal_Rela outrel;
2858 bfd_byte *loc;
2859 int dr_type, indx;
2860
2861 if (htab->elf.srelgot == NULL)
2862 abort ();
2863
2864 outrel.r_offset = (htab->elf.sgot->output_section->vma
2865 + htab->elf.sgot->output_offset + off);
2866
2867 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2868 if (r_type == R_390_TLS_GD32)
2869 dr_type = R_390_TLS_DTPMOD;
2870 else
2871 dr_type = R_390_TLS_TPOFF;
2872 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2873 outrel.r_addend = relocation - dtpoff_base (info);
2874 else
2875 outrel.r_addend = 0;
2876 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2877 loc = htab->elf.srelgot->contents;
2878 loc += htab->elf.srelgot->reloc_count++
2879 * sizeof (Elf32_External_Rela);
2880 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2881
2882 if (r_type == R_390_TLS_GD32)
2883 {
2884 if (indx == 0)
2885 {
2886 BFD_ASSERT (! unresolved_reloc);
2887 bfd_put_32 (output_bfd,
2888 relocation - dtpoff_base (info),
2889 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2890 }
2891 else
2892 {
2893 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2894 outrel.r_offset += GOT_ENTRY_SIZE;
2895 outrel.r_addend = 0;
2896 htab->elf.srelgot->reloc_count++;
2897 loc += sizeof (Elf32_External_Rela);
2898 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2899 }
2900 }
2901
2902 if (h != NULL)
2903 h->got.offset |= 1;
2904 else
2905 local_got_offsets[r_symndx] |= 1;
2906 }
2907
2908 if (off >= (bfd_vma) -2)
2909 abort ();
2910 if (r_type == ELF32_R_TYPE (rel->r_info))
2911 {
2912 relocation = htab->elf.sgot->output_offset + off;
2913 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2914 relocation += htab->elf.sgot->output_section->vma;
2915 unresolved_reloc = FALSE;
2916 }
2917 else
2918 {
2919 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2920 contents + rel->r_offset);
2921 continue;
2922 }
2923 break;
2924
2925 case R_390_TLS_GOTIE12:
2926 case R_390_TLS_GOTIE20:
2927 case R_390_TLS_IEENT:
2928 if (h == NULL)
2929 {
2930 if (local_got_offsets == NULL)
2931 abort();
2932 off = local_got_offsets[r_symndx];
2933 if (bfd_link_pic (info))
2934 goto emit_tls_relocs;
2935 }
2936 else
2937 {
2938 off = h->got.offset;
2939 tls_type = elf_s390_hash_entry(h)->tls_type;
2940 if (bfd_link_pic (info)
2941 || h->dynindx != -1
2942 || tls_type < GOT_TLS_IE)
2943 goto emit_tls_relocs;
2944 }
2945
2946 if (htab->elf.sgot == NULL)
2947 abort ();
2948
2949 BFD_ASSERT (! unresolved_reloc);
2950 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2951 htab->elf.sgot->contents + off);
2952 relocation = htab->elf.sgot->output_offset + off;
2953 if (r_type == R_390_TLS_IEENT)
2954 relocation += htab->elf.sgot->output_section->vma;
2955 unresolved_reloc = FALSE;
2956 break;
2957
2958 case R_390_TLS_LDM32:
2959 if (! bfd_link_pic (info))
2960 /* The literal pool entry this relocation refers to gets ignored
2961 by the optimized code of the local exec model. Do nothing
2962 and the value will turn out zero. */
2963 continue;
2964
2965 if (htab->elf.sgot == NULL)
2966 abort ();
2967
2968 off = htab->tls_ldm_got.offset;
2969 if (off & 1)
2970 off &= ~1;
2971 else
2972 {
2973 Elf_Internal_Rela outrel;
2974 bfd_byte *loc;
2975
2976 if (htab->elf.srelgot == NULL)
2977 abort ();
2978
2979 outrel.r_offset = (htab->elf.sgot->output_section->vma
2980 + htab->elf.sgot->output_offset + off);
2981
2982 bfd_put_32 (output_bfd, 0,
2983 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2984 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2985 outrel.r_addend = 0;
2986 loc = htab->elf.srelgot->contents;
2987 loc += htab->elf.srelgot->reloc_count++
2988 * sizeof (Elf32_External_Rela);
2989 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2990 htab->tls_ldm_got.offset |= 1;
2991 }
2992 relocation = htab->elf.sgot->output_offset + off;
2993 unresolved_reloc = FALSE;
2994 break;
2995
2996 case R_390_TLS_LE32:
2997 if (bfd_link_dll (info))
2998 {
2999 /* Linking a shared library with non-fpic code requires
3000 a R_390_TLS_TPOFF relocation. */
3001 Elf_Internal_Rela outrel;
3002 asection *sreloc;
3003 bfd_byte *loc;
3004 int indx;
3005
3006 outrel.r_offset = rel->r_offset
3007 + input_section->output_section->vma
3008 + input_section->output_offset;
3009 if (h != NULL && h->dynindx != -1)
3010 indx = h->dynindx;
3011 else
3012 indx = 0;
3013 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3014 if (indx == 0)
3015 outrel.r_addend = relocation - dtpoff_base (info);
3016 else
3017 outrel.r_addend = 0;
3018 sreloc = elf_section_data (input_section)->sreloc;
3019 if (sreloc == NULL)
3020 abort ();
3021 loc = sreloc->contents;
3022 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3023 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3024 }
3025 else
3026 {
3027 BFD_ASSERT (! unresolved_reloc);
3028 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3029 contents + rel->r_offset);
3030 }
3031 continue;
3032
3033 case R_390_TLS_LDO32:
3034 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3035 relocation -= dtpoff_base (info);
3036 else
3037 /* When converting LDO to LE, we must negate. */
3038 relocation = -tpoff (info, relocation);
3039 break;
3040
3041 /* Relocations for tls instructions. */
3042 case R_390_TLS_LOAD:
3043 case R_390_TLS_GDCALL:
3044 case R_390_TLS_LDCALL:
3045 tls_type = GOT_UNKNOWN;
3046 if (h == NULL && local_got_offsets)
3047 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3048 else if (h != NULL)
3049 tls_type = elf_s390_hash_entry(h)->tls_type;
3050
3051 if (tls_type == GOT_TLS_GD)
3052 continue;
3053
3054 if (r_type == R_390_TLS_LOAD)
3055 {
3056 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3057 {
3058 /* IE->LE transition. Four valid cases:
3059 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3060 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3061 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3062 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3063 unsigned int insn, ry;
3064
3065 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3066 if ((insn & 0xff00f000) == 0x58000000)
3067 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3068 ry = (insn & 0x000f0000);
3069 else if ((insn & 0xff0f0000) == 0x58000000)
3070 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3071 ry = (insn & 0x0000f000) << 4;
3072 else if ((insn & 0xff00f000) == 0x5800c000)
3073 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3074 ry = (insn & 0x000f0000);
3075 else if ((insn & 0xff0f0000) == 0x580c0000)
3076 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3077 ry = (insn & 0x0000f000) << 4;
3078 else
3079 {
3080 invalid_tls_insn (input_bfd, input_section, rel);
3081 return FALSE;
3082 }
3083 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3084 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3085 }
3086 }
3087 else if (r_type == R_390_TLS_GDCALL)
3088 {
3089 unsigned int insn;
3090
3091 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3092 if ((insn & 0xff000fff) != 0x4d000000 &&
3093 (insn & 0xffff0000) != 0xc0e50000 &&
3094 (insn & 0xff000000) != 0x0d000000)
3095 {
3096 invalid_tls_insn (input_bfd, input_section, rel);
3097 return FALSE;
3098 }
3099 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3100 {
3101 if ((insn & 0xff000000) == 0x0d000000)
3102 {
3103 /* GD->LE transition.
3104 basr rx, ry -> nopr r7 */
3105 insn = 0x07070000 | (insn & 0xffff);
3106 }
3107 else if ((insn & 0xff000000) == 0x4d000000)
3108 {
3109 /* GD->LE transition.
3110 bas %r14,0(%rx,%r13) -> bc 0,0 */
3111 insn = 0x47000000;
3112 }
3113 else
3114 {
3115 /* GD->LE transition.
3116 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3117 insn = 0xc0040000;
3118 bfd_put_16 (output_bfd, 0x0000,
3119 contents + rel->r_offset + 4);
3120 }
3121 }
3122 else
3123 {
3124 /* If basr is used in the pic case to invoke
3125 _tls_get_offset, something went wrong before. */
3126 if ((insn & 0xff000000) == 0x0d000000)
3127 {
3128 invalid_tls_insn (input_bfd, input_section, rel);
3129 return FALSE;
3130 }
3131
3132 if ((insn & 0xff000000) == 0x4d000000)
3133 {
3134 /* GD->IE transition.
3135 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3136 insn = 0x5822c000;
3137 }
3138 else
3139 {
3140 /* GD->IE transition.
3141 brasl %r14,__tls_get_addr@plt ->
3142 l %r2,0(%r2,%r12) ; bcr 0,0 */
3143 insn = 0x5822c000;
3144 bfd_put_16 (output_bfd, 0x0700,
3145 contents + rel->r_offset + 4);
3146 }
3147 }
3148 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3149 }
3150 else if (r_type == R_390_TLS_LDCALL)
3151 {
3152 if (!bfd_link_pic (info))
3153 {
3154 unsigned int insn;
3155
3156 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3157 if ((insn & 0xff000fff) != 0x4d000000 &&
3158 (insn & 0xffff0000) != 0xc0e50000 &&
3159 (insn & 0xff000000) != 0x0d000000)
3160 {
3161 invalid_tls_insn (input_bfd, input_section, rel);
3162 return FALSE;
3163 }
3164
3165 if ((insn & 0xff000000) == 0x0d000000)
3166 {
3167 /* LD->LE transition.
3168 basr rx, ry -> nopr r7 */
3169 insn = 0x07070000 | (insn & 0xffff);
3170 }
3171 else if ((insn & 0xff000000) == 0x4d000000)
3172 {
3173 /* LD->LE transition.
3174 bas %r14,0(%rx,%r13) -> bc 0,0 */
3175 insn = 0x47000000;
3176 }
3177 else
3178 {
3179 /* LD->LE transition.
3180 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3181 insn = 0xc0040000;
3182 bfd_put_16 (output_bfd, 0x0000,
3183 contents + rel->r_offset + 4);
3184 }
3185 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3186 }
3187 }
3188 continue;
3189
3190 default:
3191 break;
3192 }
3193
3194 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3195 because such sections are not SEC_ALLOC and thus ld.so will
3196 not process them. */
3197 if (unresolved_reloc
3198 && !((input_section->flags & SEC_DEBUGGING) != 0
3199 && h->def_dynamic)
3200 && _bfd_elf_section_offset (output_bfd, info, input_section,
3201 rel->r_offset) != (bfd_vma) -1)
3202 _bfd_error_handler
3203 /* xgettext:c-format */
3204 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3205 input_bfd,
3206 input_section,
3207 rel->r_offset,
3208 howto->name,
3209 h->root.root.string);
3210
3211 do_relocation:
3212
3213 /* When applying a 24 bit reloc we need to start one byte
3214 earlier. Otherwise the 32 bit get/put bfd operations might
3215 access a byte after the actual section. */
3216 if (r_type == R_390_PC24DBL
3217 || r_type == R_390_PLT24DBL)
3218 rel->r_offset--;
3219
3220 if (r_type == R_390_20
3221 || r_type == R_390_GOT20
3222 || r_type == R_390_GOTPLT20
3223 || r_type == R_390_TLS_GOTIE20)
3224 {
3225 relocation += rel->r_addend;
3226 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3227 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3228 contents, rel->r_offset,
3229 relocation, 0);
3230 }
3231 else
3232 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3233 contents, rel->r_offset,
3234 relocation, rel->r_addend);
3235
3236 if (r != bfd_reloc_ok)
3237 {
3238 const char *name;
3239
3240 if (h != NULL)
3241 name = h->root.root.string;
3242 else
3243 {
3244 name = bfd_elf_string_from_elf_section (input_bfd,
3245 symtab_hdr->sh_link,
3246 sym->st_name);
3247 if (name == NULL)
3248 return FALSE;
3249 if (*name == '\0')
3250 name = bfd_section_name (input_bfd, sec);
3251 }
3252
3253 if (r == bfd_reloc_overflow)
3254 (*info->callbacks->reloc_overflow)
3255 (info, (h ? &h->root : NULL), name, howto->name,
3256 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3257 else
3258 {
3259 _bfd_error_handler
3260 /* xgettext:c-format */
3261 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3262 input_bfd, input_section,
3263 rel->r_offset, name, (int) r);
3264 return FALSE;
3265 }
3266 }
3267 }
3268
3269 return TRUE;
3270 }
3271
3272 /* Generate the PLT slots together with the dynamic relocations needed
3273 for IFUNC symbols. */
3274
3275 static void
3276 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3277 struct bfd_link_info *info,
3278 struct elf_link_hash_entry *h,
3279 struct elf_s390_link_hash_table *htab,
3280 bfd_vma iplt_offset,
3281 bfd_vma resolver_address)
3282 {
3283 bfd_vma iplt_index;
3284 bfd_vma got_offset;
3285 bfd_vma igotiplt_offset;
3286 Elf_Internal_Rela rela;
3287 bfd_byte *loc;
3288 asection *plt, *gotplt, *relplt;
3289 bfd_vma relative_offset;
3290
3291 if (htab->elf.iplt == NULL
3292 || htab->elf.igotplt == NULL
3293 || htab->elf.irelplt == NULL)
3294 abort ();
3295
3296 gotplt = htab->elf.igotplt;
3297 relplt = htab->elf.irelplt;
3298
3299 /* Index of the PLT slot within iplt section. */
3300 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3301 plt = htab->elf.iplt;
3302 /* Offset into the igot.plt section. */
3303 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3304 /* Offset into the got section. */
3305 got_offset = igotiplt_offset + gotplt->output_offset;
3306
3307 /* S390 uses halfwords for relative branch calc! */
3308 relative_offset = - (plt->output_offset +
3309 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3310 /* If offset is > 32768, branch to a previous branch
3311 390 can only handle +-64 K jumps. */
3312 if ( -32768 > (int) relative_offset )
3313 relative_offset
3314 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3315
3316 /* Fill in the entry in the procedure linkage table. */
3317 if (!bfd_link_pic (info))
3318 {
3319 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3320 PLT_ENTRY_SIZE);
3321
3322 /* Adjust jump to the first plt entry. */
3323 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3324 plt->contents + iplt_offset + 20);
3325
3326 /* Push the GOT offset field. */
3327 bfd_put_32 (output_bfd,
3328 (gotplt->output_section->vma
3329 + got_offset),
3330 plt->contents + iplt_offset + 24);
3331 }
3332 else if (got_offset < 4096)
3333 {
3334 /* The GOT offset is small enough to be used directly as
3335 displacement. */
3336 memcpy (plt->contents + iplt_offset,
3337 elf_s390_plt_pic12_entry,
3338 PLT_ENTRY_SIZE);
3339
3340 /* Put in the GOT offset as displacement value. The 0xc000
3341 value comes from the first word of the plt entry. Look
3342 at the elf_s390_plt_pic16_entry content. */
3343 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3344 plt->contents + iplt_offset + 2);
3345
3346 /* Adjust the jump to the first plt entry. */
3347 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3348 plt->contents + iplt_offset + 20);
3349 }
3350 else if (got_offset < 32768)
3351 {
3352 /* The GOT offset is too big for a displacement but small
3353 enough to be a signed 16 bit immediate value as it can be
3354 used in an lhi instruction. */
3355 memcpy (plt->contents + iplt_offset,
3356 elf_s390_plt_pic16_entry,
3357 PLT_ENTRY_SIZE);
3358
3359 /* Put in the GOT offset for the lhi instruction. */
3360 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3361 plt->contents + iplt_offset + 2);
3362
3363 /* Adjust the jump to the first plt entry. */
3364 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3365 plt->contents + iplt_offset + 20);
3366 }
3367 else
3368 {
3369 memcpy (plt->contents + iplt_offset,
3370 elf_s390_plt_pic_entry,
3371 PLT_ENTRY_SIZE);
3372
3373 /* Adjust the jump to the first plt entry. */
3374 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3375 plt->contents + iplt_offset + 20);
3376
3377 /* Push the GOT offset field. */
3378 bfd_put_32 (output_bfd, got_offset,
3379 plt->contents + iplt_offset + 24);
3380 }
3381 /* Insert offset into reloc. table here. */
3382 bfd_put_32 (output_bfd, relplt->output_offset +
3383 iplt_index * RELA_ENTRY_SIZE,
3384 plt->contents + iplt_offset + 28);
3385
3386 /* Fill in the entry in the global offset table.
3387 Points to instruction after GOT offset. */
3388 bfd_put_32 (output_bfd,
3389 (plt->output_section->vma
3390 + plt->output_offset
3391 + iplt_offset
3392 + 12),
3393 gotplt->contents + igotiplt_offset);
3394
3395 /* Fill in the entry in the .rela.plt section. */
3396 rela.r_offset = gotplt->output_section->vma + got_offset;
3397
3398 if (!h
3399 || h->dynindx == -1
3400 || ((bfd_link_executable (info)
3401 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3402 && h->def_regular))
3403 {
3404 /* The symbol can be locally resolved. */
3405 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3406 rela.r_addend = resolver_address;
3407 }
3408 else
3409 {
3410 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3411 rela.r_addend = 0;
3412 }
3413
3414 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3415 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3416 }
3417
3418 /* Finish up dynamic symbol handling. We set the contents of various
3419 dynamic sections here. */
3420
3421 static bfd_boolean
3422 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3423 struct bfd_link_info *info,
3424 struct elf_link_hash_entry *h,
3425 Elf_Internal_Sym *sym)
3426 {
3427 struct elf_s390_link_hash_table *htab;
3428 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3429
3430 htab = elf_s390_hash_table (info);
3431
3432 if (h->plt.offset != (bfd_vma) -1)
3433 {
3434 bfd_vma plt_index;
3435 bfd_vma got_offset;
3436 Elf_Internal_Rela rela;
3437 bfd_byte *loc;
3438 bfd_vma relative_offset;
3439
3440 /* This symbol has an entry in the procedure linkage table. Set
3441 it up. */
3442 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3443 {
3444 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3445 htab, h->plt.offset,
3446 eh->ifunc_resolver_address +
3447 eh->ifunc_resolver_section->output_offset +
3448 eh->ifunc_resolver_section->output_section->vma);
3449 /* Do not return yet. Handling of explicit GOT slots of
3450 IFUNC symbols is below. */
3451 }
3452 else
3453 {
3454 if (h->dynindx == -1
3455 || htab->elf.splt == NULL
3456 || htab->elf.sgotplt == NULL
3457 || htab->elf.srelplt == NULL)
3458 abort ();
3459
3460 /* Calc. index no.
3461 Current offset - size first entry / entry size. */
3462 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3463
3464 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3465 addr & GOT addr. */
3466 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3467
3468 /* S390 uses halfwords for relative branch calc! */
3469 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3470 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3471 /* If offset is > 32768, branch to a previous branch
3472 390 can only handle +-64 K jumps. */
3473 if ( -32768 > (int) relative_offset )
3474 relative_offset
3475 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3476
3477 /* Fill in the entry in the procedure linkage table. */
3478 if (!bfd_link_pic (info))
3479 {
3480 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3481 PLT_ENTRY_SIZE);
3482
3483 /* Adjust jump to the first plt entry. */
3484 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3485 htab->elf.splt->contents + h->plt.offset + 20);
3486
3487 /* Push the GOT offset field. */
3488 bfd_put_32 (output_bfd,
3489 (htab->elf.sgotplt->output_section->vma
3490 + htab->elf.sgotplt->output_offset
3491 + got_offset),
3492 htab->elf.splt->contents + h->plt.offset + 24);
3493 }
3494 else if (got_offset < 4096)
3495 {
3496 /* The GOT offset is small enough to be used directly as
3497 displacement. */
3498 memcpy (htab->elf.splt->contents + h->plt.offset,
3499 elf_s390_plt_pic12_entry,
3500 PLT_ENTRY_SIZE);
3501
3502 /* Put in the GOT offset as displacement value. The 0xc000
3503 value comes from the first word of the plt entry. Look
3504 at the elf_s390_plt_pic12_entry content. */
3505 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3506 htab->elf.splt->contents + h->plt.offset + 2);
3507
3508 /* Adjust the jump to the first plt entry. */
3509 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3510 htab->elf.splt->contents + h->plt.offset + 20);
3511 }
3512 else if (got_offset < 32768)
3513 {
3514 /* The GOT offset is too big for a displacement but small
3515 enough to be a signed 16 bit immediate value as it can be
3516 used in an lhi instruction. */
3517 memcpy (htab->elf.splt->contents + h->plt.offset,
3518 elf_s390_plt_pic16_entry,
3519 PLT_ENTRY_SIZE);
3520
3521 /* Put in the GOT offset for the lhi instruction. */
3522 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3523 htab->elf.splt->contents + h->plt.offset + 2);
3524
3525 /* Adjust the jump to the first plt entry. */
3526 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3527 htab->elf.splt->contents + h->plt.offset + 20);
3528 }
3529 else
3530 {
3531 memcpy (htab->elf.splt->contents + h->plt.offset,
3532 elf_s390_plt_pic_entry,
3533 PLT_ENTRY_SIZE);
3534
3535 /* Adjust the jump to the first plt entry. */
3536 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3537 htab->elf.splt->contents + h->plt.offset + 20);
3538
3539 /* Push the GOT offset field. */
3540 bfd_put_32 (output_bfd, got_offset,
3541 htab->elf.splt->contents + h->plt.offset + 24);
3542 }
3543 /* Insert offset into reloc. table here. */
3544 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3545 htab->elf.splt->contents + h->plt.offset + 28);
3546
3547 /* Fill in the entry in the global offset table.
3548 Points to instruction after GOT offset. */
3549 bfd_put_32 (output_bfd,
3550 (htab->elf.splt->output_section->vma
3551 + htab->elf.splt->output_offset
3552 + h->plt.offset
3553 + 12),
3554 htab->elf.sgotplt->contents + got_offset);
3555
3556 /* Fill in the entry in the .rela.plt section. */
3557 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3558 + htab->elf.sgotplt->output_offset
3559 + got_offset);
3560 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3561 rela.r_addend = 0;
3562 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3563 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3564
3565 if (!h->def_regular)
3566 {
3567 /* Mark the symbol as undefined, rather than as defined in
3568 the .plt section. Leave the value alone. This is a clue
3569 for the dynamic linker, to make function pointer
3570 comparisons work between an application and shared
3571 library. */
3572 sym->st_shndx = SHN_UNDEF;
3573 }
3574 }
3575 }
3576
3577 if (h->got.offset != (bfd_vma) -1
3578 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3579 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3580 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3581 {
3582 Elf_Internal_Rela rela;
3583 bfd_byte *loc;
3584
3585 /* This symbol has an entry in the global offset table. Set it
3586 up. */
3587
3588 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3589 abort ();
3590
3591 rela.r_offset = (htab->elf.sgot->output_section->vma
3592 + htab->elf.sgot->output_offset
3593 + (h->got.offset &~ (bfd_vma) 1));
3594
3595 /* If this is a static link, or it is a -Bsymbolic link and the
3596 symbol is defined locally or was forced to be local because
3597 of a version file, we just want to emit a RELATIVE reloc.
3598 The entry in the global offset table will already have been
3599 initialized in the relocate_section function. */
3600 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3601 {
3602 if (bfd_link_pic (info))
3603 {
3604 /* An explicit GOT slot usage needs GLOB_DAT. If the
3605 symbol references local the implicit got.iplt slot
3606 will be used and the IRELATIVE reloc has been created
3607 above. */
3608 goto do_glob_dat;
3609 }
3610 else
3611 {
3612 /* For non-shared objects explicit GOT slots must be
3613 filled with the PLT slot address for pointer
3614 equality reasons. */
3615 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3616 + htab->elf.iplt->output_offset
3617 + h->plt.offset),
3618 htab->elf.sgot->contents + h->got.offset);
3619 return TRUE;
3620 }
3621 }
3622 else if (bfd_link_pic (info)
3623 && SYMBOL_REFERENCES_LOCAL (info, h))
3624 {
3625 /* If this is a static link, or it is a -Bsymbolic link and
3626 the symbol is defined locally or was forced to be local
3627 because of a version file, we just want to emit a
3628 RELATIVE reloc. The entry in the global offset table
3629 will already have been initialized in the
3630 relocate_section function. */
3631 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3632 return FALSE;
3633 BFD_ASSERT((h->got.offset & 1) != 0);
3634 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3635 rela.r_addend = (h->root.u.def.value
3636 + h->root.u.def.section->output_section->vma
3637 + h->root.u.def.section->output_offset);
3638 }
3639 else
3640 {
3641 BFD_ASSERT((h->got.offset & 1) == 0);
3642 do_glob_dat:
3643 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3644 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3645 rela.r_addend = 0;
3646 }
3647
3648 loc = htab->elf.srelgot->contents;
3649 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3650 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3651 }
3652
3653 if (h->needs_copy)
3654 {
3655 Elf_Internal_Rela rela;
3656 asection *s;
3657 bfd_byte *loc;
3658
3659 /* This symbols needs a copy reloc. Set it up. */
3660
3661 if (h->dynindx == -1
3662 || (h->root.type != bfd_link_hash_defined
3663 && h->root.type != bfd_link_hash_defweak)
3664 || htab->elf.srelbss == NULL
3665 || htab->elf.sreldynrelro == NULL)
3666 abort ();
3667
3668 rela.r_offset = (h->root.u.def.value
3669 + h->root.u.def.section->output_section->vma
3670 + h->root.u.def.section->output_offset);
3671 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3672 rela.r_addend = 0;
3673 if (h->root.u.def.section == htab->elf.sdynrelro)
3674 s = htab->elf.sreldynrelro;
3675 else
3676 s = htab->elf.srelbss;
3677 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3678 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3679 }
3680
3681 /* Mark some specially defined symbols as absolute. */
3682 if (h == htab->elf.hdynamic
3683 || h == htab->elf.hgot
3684 || h == htab->elf.hplt)
3685 sym->st_shndx = SHN_ABS;
3686
3687 return TRUE;
3688 }
3689
3690 /* Used to decide how to sort relocs in an optimal manner for the
3691 dynamic linker, before writing them out. */
3692
3693 static enum elf_reloc_type_class
3694 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3695 const asection *rel_sec ATTRIBUTE_UNUSED,
3696 const Elf_Internal_Rela *rela)
3697 {
3698 bfd *abfd = info->output_bfd;
3699 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3700 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3701 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3702 Elf_Internal_Sym sym;
3703
3704 if (htab->elf.dynsym == NULL
3705 || !bed->s->swap_symbol_in (abfd,
3706 (htab->elf.dynsym->contents
3707 + r_symndx * bed->s->sizeof_sym),
3708 0, &sym))
3709 abort ();
3710
3711 /* Check relocation against STT_GNU_IFUNC symbol. */
3712 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3713 return reloc_class_ifunc;
3714
3715 switch ((int) ELF32_R_TYPE (rela->r_info))
3716 {
3717 case R_390_RELATIVE:
3718 return reloc_class_relative;
3719 case R_390_JMP_SLOT:
3720 return reloc_class_plt;
3721 case R_390_COPY:
3722 return reloc_class_copy;
3723 default:
3724 return reloc_class_normal;
3725 }
3726 }
3727
3728 /* Finish up the dynamic sections. */
3729
3730 static bfd_boolean
3731 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3732 struct bfd_link_info *info)
3733 {
3734 struct elf_s390_link_hash_table *htab;
3735 bfd *dynobj;
3736 asection *sdyn;
3737 bfd *ibfd;
3738 unsigned int i;
3739
3740 htab = elf_s390_hash_table (info);
3741 dynobj = htab->elf.dynobj;
3742 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3743
3744 if (htab->elf.dynamic_sections_created)
3745 {
3746 Elf32_External_Dyn *dyncon, *dynconend;
3747
3748 if (sdyn == NULL || htab->elf.sgot == NULL)
3749 abort ();
3750
3751 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3752 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3753 for (; dyncon < dynconend; dyncon++)
3754 {
3755 Elf_Internal_Dyn dyn;
3756 asection *s;
3757
3758 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3759
3760 switch (dyn.d_tag)
3761 {
3762 default:
3763 continue;
3764
3765 case DT_PLTGOT:
3766 s = htab->elf.sgotplt;
3767 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3768 break;
3769
3770 case DT_JMPREL:
3771 s = htab->elf.srelplt;
3772 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3773 break;
3774
3775 case DT_PLTRELSZ:
3776 dyn.d_un.d_val = htab->elf.srelplt->size;
3777 if (htab->elf.irelplt)
3778 dyn.d_un.d_val += htab->elf.irelplt->size;
3779 break;
3780 }
3781
3782 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3783 }
3784
3785 /* Fill in the special first entry in the procedure linkage table. */
3786 if (htab->elf.splt && htab->elf.splt->size > 0)
3787 {
3788 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3789 if (bfd_link_pic (info))
3790 {
3791 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3792 PLT_FIRST_ENTRY_SIZE);
3793 }
3794 else
3795 {
3796 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3797 PLT_FIRST_ENTRY_SIZE);
3798 bfd_put_32 (output_bfd,
3799 htab->elf.sgotplt->output_section->vma
3800 + htab->elf.sgotplt->output_offset,
3801 htab->elf.splt->contents + 24);
3802 }
3803 elf_section_data (htab->elf.splt->output_section)
3804 ->this_hdr.sh_entsize = 4;
3805 }
3806
3807 }
3808
3809 if (htab->elf.sgotplt)
3810 {
3811 /* Fill in the first three entries in the global offset table. */
3812 if (htab->elf.sgotplt->size > 0)
3813 {
3814 bfd_put_32 (output_bfd,
3815 (sdyn == NULL ? (bfd_vma) 0
3816 : sdyn->output_section->vma + sdyn->output_offset),
3817 htab->elf.sgotplt->contents);
3818 /* One entry for shared object struct ptr. */
3819 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3820 /* One entry for _dl_runtime_resolve. */
3821 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3822 }
3823
3824 elf_section_data (htab->elf.sgotplt->output_section)
3825 ->this_hdr.sh_entsize = 4;
3826 }
3827 /* Finish dynamic symbol for local IFUNC symbols. */
3828 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3829 {
3830 struct plt_entry *local_plt;
3831 Elf_Internal_Sym *isym;
3832 Elf_Internal_Shdr *symtab_hdr;
3833
3834 symtab_hdr = &elf_symtab_hdr (ibfd);
3835
3836 if (!is_s390_elf (ibfd))
3837 continue;
3838
3839 local_plt = elf_s390_local_plt (ibfd);
3840 if (local_plt != NULL)
3841 for (i = 0; i < symtab_hdr->sh_info; i++)
3842 {
3843 if (local_plt[i].plt.offset != (bfd_vma) -1)
3844 {
3845 asection *sec = local_plt[i].sec;
3846 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3847 if (isym == NULL)
3848 return FALSE;
3849
3850 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3851 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3852 local_plt[i].plt.offset,
3853 isym->st_value
3854 + sec->output_section->vma
3855 + sec->output_offset);
3856
3857 }
3858 }
3859 }
3860 return TRUE;
3861 }
3862 \f
3863 /* Support for core dump NOTE sections. */
3864
3865 static bfd_boolean
3866 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3867 {
3868 int offset;
3869 unsigned int size;
3870
3871 switch (note->descsz)
3872 {
3873 default:
3874 return FALSE;
3875
3876 case 224: /* S/390 Linux. */
3877 /* pr_cursig */
3878 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3879
3880 /* pr_pid */
3881 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3882
3883 /* pr_reg */
3884 offset = 72;
3885 size = 144;
3886 break;
3887 }
3888
3889 /* Make a ".reg/999" section. */
3890 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3891 size, note->descpos + offset);
3892 }
3893
3894 static bfd_boolean
3895 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3896 {
3897 switch (note->descsz)
3898 {
3899 default:
3900 return FALSE;
3901
3902 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3903 elf_tdata (abfd)->core->pid
3904 = bfd_get_32 (abfd, note->descdata + 12);
3905 elf_tdata (abfd)->core->program
3906 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3907 elf_tdata (abfd)->core->command
3908 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3909 break;
3910 }
3911
3912 /* Note that for some reason, a spurious space is tacked
3913 onto the end of the args in some (at least one anyway)
3914 implementations, so strip it off if it exists. */
3915
3916 {
3917 char *command = elf_tdata (abfd)->core->command;
3918 int n = strlen (command);
3919
3920 if (0 < n && command[n - 1] == ' ')
3921 command[n - 1] = '\0';
3922 }
3923
3924 return TRUE;
3925 }
3926
3927 static char *
3928 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3929 int note_type, ...)
3930 {
3931 va_list ap;
3932
3933 switch (note_type)
3934 {
3935 default:
3936 return NULL;
3937
3938 case NT_PRPSINFO:
3939 {
3940 char data[124] = { 0 };
3941 const char *fname, *psargs;
3942
3943 va_start (ap, note_type);
3944 fname = va_arg (ap, const char *);
3945 psargs = va_arg (ap, const char *);
3946 va_end (ap);
3947
3948 strncpy (data + 28, fname, 16);
3949 strncpy (data + 44, psargs, 80);
3950 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3951 &data, sizeof (data));
3952 }
3953
3954 case NT_PRSTATUS:
3955 {
3956 char data[224] = { 0 };
3957 long pid;
3958 int cursig;
3959 const void *gregs;
3960
3961 va_start (ap, note_type);
3962 pid = va_arg (ap, long);
3963 cursig = va_arg (ap, int);
3964 gregs = va_arg (ap, const void *);
3965 va_end (ap);
3966
3967 bfd_put_16 (abfd, cursig, data + 12);
3968 bfd_put_32 (abfd, pid, data + 24);
3969 memcpy (data + 72, gregs, 144);
3970 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3971 &data, sizeof (data));
3972 }
3973 }
3974 /* NOTREACHED */
3975 }
3976 \f
3977 /* Return address for Ith PLT stub in section PLT, for relocation REL
3978 or (bfd_vma) -1 if it should not be included. */
3979
3980 static bfd_vma
3981 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3982 const arelent *rel ATTRIBUTE_UNUSED)
3983 {
3984 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3985 }
3986
3987 /* Merge backend specific data from an object file to the output
3988 object file when linking. */
3989
3990 static bfd_boolean
3991 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3992 {
3993 bfd *obfd = info->output_bfd;
3994
3995 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3996 return TRUE;
3997
3998 if (!elf_s390_merge_obj_attributes (ibfd, info))
3999 return FALSE;
4000
4001 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4002 return TRUE;
4003 }
4004
4005
4006 #define TARGET_BIG_SYM s390_elf32_vec
4007 #define TARGET_BIG_NAME "elf32-s390"
4008 #define ELF_ARCH bfd_arch_s390
4009 #define ELF_TARGET_ID S390_ELF_DATA
4010 #define ELF_MACHINE_CODE EM_S390
4011 #define ELF_MACHINE_ALT1 EM_S390_OLD
4012 #define ELF_MAXPAGESIZE 0x1000
4013
4014 #define elf_backend_can_gc_sections 1
4015 #define elf_backend_can_refcount 1
4016 #define elf_backend_want_got_plt 1
4017 #define elf_backend_plt_readonly 1
4018 #define elf_backend_want_plt_sym 0
4019 #define elf_backend_got_header_size 12
4020 #define elf_backend_want_dynrelro 1
4021 #define elf_backend_rela_normal 1
4022
4023 #define elf_info_to_howto elf_s390_info_to_howto
4024
4025 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4026 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4027 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4028 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4029
4030 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4031
4032 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4033 #define elf_backend_check_relocs elf_s390_check_relocs
4034 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4035 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4036 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4037 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4038 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4039 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4040 #define elf_backend_relocate_section elf_s390_relocate_section
4041 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4042 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4043 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4044 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4045 #define elf_backend_write_core_note elf_s390_write_core_note
4046 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4047 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4048 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4049
4050 #define bfd_elf32_mkobject elf_s390_mkobject
4051 #define elf_backend_object_p elf_s390_object_p
4052
4053 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4054
4055 #include "elf32-target.h"
The GNU Binutils are a collection of binary tools.