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powerpc-aix5.2 tests
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2020 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include <stdarg.h>
29
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
36
37 /* The relocation "howto" table. */
38
39 static reloc_howto_type elf_howto_table[] =
40 {
41 HOWTO (R_390_NONE, /* type */
42 0, /* rightshift */
43 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
44 0, /* bitsize */
45 FALSE, /* pc_relative */
46 0, /* bitpos */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
51 0, /* src_mask */
52 0, /* dst_mask */
53 FALSE), /* pcrel_offset */
54
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
172 };
173
174 /* GNU extension to record C++ vtable hierarchy. */
175 static reloc_howto_type elf32_s390_vtinherit_howto =
176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
177 static reloc_howto_type elf32_s390_vtentry_howto =
178 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
179
180 static reloc_howto_type *
181 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182 bfd_reloc_code_real_type code)
183 {
184 switch (code)
185 {
186 case BFD_RELOC_NONE:
187 return &elf_howto_table[(int) R_390_NONE];
188 case BFD_RELOC_8:
189 return &elf_howto_table[(int) R_390_8];
190 case BFD_RELOC_390_12:
191 return &elf_howto_table[(int) R_390_12];
192 case BFD_RELOC_16:
193 return &elf_howto_table[(int) R_390_16];
194 case BFD_RELOC_32:
195 return &elf_howto_table[(int) R_390_32];
196 case BFD_RELOC_CTOR:
197 return &elf_howto_table[(int) R_390_32];
198 case BFD_RELOC_32_PCREL:
199 return &elf_howto_table[(int) R_390_PC32];
200 case BFD_RELOC_390_GOT12:
201 return &elf_howto_table[(int) R_390_GOT12];
202 case BFD_RELOC_32_GOT_PCREL:
203 return &elf_howto_table[(int) R_390_GOT32];
204 case BFD_RELOC_390_PLT32:
205 return &elf_howto_table[(int) R_390_PLT32];
206 case BFD_RELOC_390_COPY:
207 return &elf_howto_table[(int) R_390_COPY];
208 case BFD_RELOC_390_GLOB_DAT:
209 return &elf_howto_table[(int) R_390_GLOB_DAT];
210 case BFD_RELOC_390_JMP_SLOT:
211 return &elf_howto_table[(int) R_390_JMP_SLOT];
212 case BFD_RELOC_390_RELATIVE:
213 return &elf_howto_table[(int) R_390_RELATIVE];
214 case BFD_RELOC_32_GOTOFF:
215 return &elf_howto_table[(int) R_390_GOTOFF32];
216 case BFD_RELOC_390_GOTPC:
217 return &elf_howto_table[(int) R_390_GOTPC];
218 case BFD_RELOC_390_GOT16:
219 return &elf_howto_table[(int) R_390_GOT16];
220 case BFD_RELOC_16_PCREL:
221 return &elf_howto_table[(int) R_390_PC16];
222 case BFD_RELOC_390_PC12DBL:
223 return &elf_howto_table[(int) R_390_PC12DBL];
224 case BFD_RELOC_390_PLT12DBL:
225 return &elf_howto_table[(int) R_390_PLT12DBL];
226 case BFD_RELOC_390_PC16DBL:
227 return &elf_howto_table[(int) R_390_PC16DBL];
228 case BFD_RELOC_390_PLT16DBL:
229 return &elf_howto_table[(int) R_390_PLT16DBL];
230 case BFD_RELOC_390_PC24DBL:
231 return &elf_howto_table[(int) R_390_PC24DBL];
232 case BFD_RELOC_390_PLT24DBL:
233 return &elf_howto_table[(int) R_390_PLT24DBL];
234 case BFD_RELOC_390_PC32DBL:
235 return &elf_howto_table[(int) R_390_PC32DBL];
236 case BFD_RELOC_390_PLT32DBL:
237 return &elf_howto_table[(int) R_390_PLT32DBL];
238 case BFD_RELOC_390_GOTPCDBL:
239 return &elf_howto_table[(int) R_390_GOTPCDBL];
240 case BFD_RELOC_390_GOTENT:
241 return &elf_howto_table[(int) R_390_GOTENT];
242 case BFD_RELOC_16_GOTOFF:
243 return &elf_howto_table[(int) R_390_GOTOFF16];
244 case BFD_RELOC_390_GOTPLT12:
245 return &elf_howto_table[(int) R_390_GOTPLT12];
246 case BFD_RELOC_390_GOTPLT16:
247 return &elf_howto_table[(int) R_390_GOTPLT16];
248 case BFD_RELOC_390_GOTPLT32:
249 return &elf_howto_table[(int) R_390_GOTPLT32];
250 case BFD_RELOC_390_GOTPLTENT:
251 return &elf_howto_table[(int) R_390_GOTPLTENT];
252 case BFD_RELOC_390_PLTOFF16:
253 return &elf_howto_table[(int) R_390_PLTOFF16];
254 case BFD_RELOC_390_PLTOFF32:
255 return &elf_howto_table[(int) R_390_PLTOFF32];
256 case BFD_RELOC_390_TLS_LOAD:
257 return &elf_howto_table[(int) R_390_TLS_LOAD];
258 case BFD_RELOC_390_TLS_GDCALL:
259 return &elf_howto_table[(int) R_390_TLS_GDCALL];
260 case BFD_RELOC_390_TLS_LDCALL:
261 return &elf_howto_table[(int) R_390_TLS_LDCALL];
262 case BFD_RELOC_390_TLS_GD32:
263 return &elf_howto_table[(int) R_390_TLS_GD32];
264 case BFD_RELOC_390_TLS_GOTIE12:
265 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266 case BFD_RELOC_390_TLS_GOTIE32:
267 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268 case BFD_RELOC_390_TLS_LDM32:
269 return &elf_howto_table[(int) R_390_TLS_LDM32];
270 case BFD_RELOC_390_TLS_IE32:
271 return &elf_howto_table[(int) R_390_TLS_IE32];
272 case BFD_RELOC_390_TLS_IEENT:
273 return &elf_howto_table[(int) R_390_TLS_IEENT];
274 case BFD_RELOC_390_TLS_LE32:
275 return &elf_howto_table[(int) R_390_TLS_LE32];
276 case BFD_RELOC_390_TLS_LDO32:
277 return &elf_howto_table[(int) R_390_TLS_LDO32];
278 case BFD_RELOC_390_TLS_DTPMOD:
279 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280 case BFD_RELOC_390_TLS_DTPOFF:
281 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282 case BFD_RELOC_390_TLS_TPOFF:
283 return &elf_howto_table[(int) R_390_TLS_TPOFF];
284 case BFD_RELOC_390_20:
285 return &elf_howto_table[(int) R_390_20];
286 case BFD_RELOC_390_GOT20:
287 return &elf_howto_table[(int) R_390_GOT20];
288 case BFD_RELOC_390_GOTPLT20:
289 return &elf_howto_table[(int) R_390_GOTPLT20];
290 case BFD_RELOC_390_TLS_GOTIE20:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292 case BFD_RELOC_390_IRELATIVE:
293 return &elf_howto_table[(int) R_390_IRELATIVE];
294 case BFD_RELOC_VTABLE_INHERIT:
295 return &elf32_s390_vtinherit_howto;
296 case BFD_RELOC_VTABLE_ENTRY:
297 return &elf32_s390_vtentry_howto;
298 default:
299 break;
300 }
301 return 0;
302 }
303
304 static reloc_howto_type *
305 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
306 const char *r_name)
307 {
308 unsigned int i;
309
310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311 if (elf_howto_table[i].name != NULL
312 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313 return &elf_howto_table[i];
314
315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316 return &elf32_s390_vtinherit_howto;
317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318 return &elf32_s390_vtentry_howto;
319
320 return NULL;
321 }
322
323 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
324 and elf32-s390.c has its own copy. */
325
326 static bfd_boolean
327 elf_s390_info_to_howto (bfd *abfd,
328 arelent *cache_ptr,
329 Elf_Internal_Rela *dst)
330 {
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
332
333 switch (r_type)
334 {
335 case R_390_GNU_VTINHERIT:
336 cache_ptr->howto = &elf32_s390_vtinherit_howto;
337 break;
338
339 case R_390_GNU_VTENTRY:
340 cache_ptr->howto = &elf32_s390_vtentry_howto;
341 break;
342
343 default:
344 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
345 {
346 /* xgettext:c-format */
347 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
348 abfd, r_type);
349 bfd_set_error (bfd_error_bad_value);
350 return FALSE;
351 }
352 cache_ptr->howto = &elf_howto_table[r_type];
353 }
354
355 return TRUE;
356 }
357
358 /* A relocation function which doesn't do anything. */
359 static bfd_reloc_status_type
360 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
361 arelent *reloc_entry,
362 asymbol *symbol ATTRIBUTE_UNUSED,
363 void * data ATTRIBUTE_UNUSED,
364 asection *input_section,
365 bfd *output_bfd,
366 char **error_message ATTRIBUTE_UNUSED)
367 {
368 if (output_bfd)
369 reloc_entry->address += input_section->output_offset;
370 return bfd_reloc_ok;
371 }
372
373 /* Handle the large displacement relocs. */
374 static bfd_reloc_status_type
375 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
376 arelent *reloc_entry,
377 asymbol *symbol,
378 void * data ATTRIBUTE_UNUSED,
379 asection *input_section,
380 bfd *output_bfd,
381 char **error_message ATTRIBUTE_UNUSED)
382 {
383 reloc_howto_type *howto = reloc_entry->howto;
384 bfd_vma relocation;
385 bfd_vma insn;
386
387 if (output_bfd != (bfd *) NULL
388 && (symbol->flags & BSF_SECTION_SYM) == 0
389 && (! howto->partial_inplace
390 || reloc_entry->addend == 0))
391 {
392 reloc_entry->address += input_section->output_offset;
393 return bfd_reloc_ok;
394 }
395
396 if (output_bfd != NULL)
397 return bfd_reloc_continue;
398
399 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
400 return bfd_reloc_outofrange;
401
402 relocation = (symbol->value
403 + symbol->section->output_section->vma
404 + symbol->section->output_offset);
405 relocation += reloc_entry->addend;
406 if (howto->pc_relative)
407 {
408 relocation -= (input_section->output_section->vma
409 + input_section->output_offset);
410 relocation -= reloc_entry->address;
411 }
412
413 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
414 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
415 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
416
417 if ((bfd_signed_vma) relocation < - 0x80000
418 || (bfd_signed_vma) relocation > 0x7ffff)
419 return bfd_reloc_overflow;
420 else
421 return bfd_reloc_ok;
422 }
423
424 static bfd_boolean
425 elf_s390_is_local_label_name (bfd *abfd, const char *name)
426 {
427 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
428 return TRUE;
429
430 return _bfd_elf_is_local_label_name (abfd, name);
431 }
432
433 /* Functions for the 390 ELF linker. */
434
435 /* The name of the dynamic interpreter. This is put in the .interp
436 section. */
437
438 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
439
440 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
441 copying dynamic variables from a shared lib into an app's dynbss
442 section, and instead use a dynamic relocation to point into the
443 shared lib. */
444 #define ELIMINATE_COPY_RELOCS 1
445
446 /* The size in bytes of the first entry in the procedure linkage table. */
447 #define PLT_FIRST_ENTRY_SIZE 32
448 /* The size in bytes of an entry in the procedure linkage table. */
449 #define PLT_ENTRY_SIZE 32
450
451 #define GOT_ENTRY_SIZE 4
452
453 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
454
455 /* The first three entries in a procedure linkage table are reserved,
456 and the initial contents are unimportant (we zero them out).
457 Subsequent entries look like this. See the SVR4 ABI 386
458 supplement to see how this works. */
459
460 /* For the s390, simple addr offset can only be 0 - 4096.
461 To use the full 2 GB address space, several instructions
462 are needed to load an address in a register and execute
463 a branch( or just saving the address)
464
465 Furthermore, only r 0 and 1 are free to use!!! */
466
467 /* The first 3 words in the GOT are then reserved.
468 Word 0 is the address of the dynamic table.
469 Word 1 is a pointer to a structure describing the object
470 Word 2 is used to point to the loader entry address.
471
472 The code for position independent PLT entries looks like this:
473
474 r12 holds addr of the current GOT at entry to the PLT
475
476 The GOT holds the address in the PLT to be executed.
477 The loader then gets:
478 24(15) = Pointer to the structure describing the object.
479 28(15) = Offset into rela.plt
480
481 The loader must then find the module where the function is
482 and insert the address in the GOT.
483
484 Note: 390 can only address +- 64 K relative.
485 We check if offset > 65536, then make a relative branch -64xxx
486 back to a previous defined branch
487
488 PLT1: BASR 1,0 # 2 bytes
489 L 1,22(1) # 4 bytes Load offset in GOT in r 1
490 L 1,(1,12) # 4 bytes Load address from GOT in r1
491 BCR 15,1 # 2 bytes Jump to address
492 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
493 L 1,14(1) # 4 bytes Load offset in symol table in r1
494 BRC 15,-x # 4 bytes Jump to start of PLT
495 .word 0 # 2 bytes filler
496 .long ? # 4 bytes offset in GOT
497 .long ? # 4 bytes offset into rela.plt
498
499 This was the general case. There are two additional, optimizes PLT
500 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
501 First the one for GOT offsets < 4096:
502
503 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
504 BCR 15,1 # 2 bytes Jump to address
505 .word 0,0,0 # 6 bytes filler
506 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
507 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
508 BRC 15,-x # 4 bytes Jump to start of PLT
509 .word 0,0,0 # 6 bytes filler
510 .long ? # 4 bytes offset into rela.plt
511
512 Second the one for GOT offsets < 32768:
513
514 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
515 L 1,(1,12) # 4 bytes Load address from GOT to r1
516 BCR 15,1 # 2 bytes Jump to address
517 .word 0 # 2 bytes filler
518 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
519 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
520 BRC 15,-x # 4 bytes Jump to start of PLT
521 .word 0,0,0 # 6 bytes filler
522 .long ? # 4 bytes offset into rela.plt
523
524 Total = 32 bytes per PLT entry
525
526 The code for static build PLT entries looks like this:
527
528 PLT1: BASR 1,0 # 2 bytes
529 L 1,22(1) # 4 bytes Load address of GOT entry
530 L 1,0(0,1) # 4 bytes Load address from GOT in r1
531 BCR 15,1 # 2 bytes Jump to address
532 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
533 L 1,14(1) # 4 bytes Load offset in symbol table in r1
534 BRC 15,-x # 4 bytes Jump to start of PLT
535 .word 0 # 2 bytes filler
536 .long ? # 4 bytes address of GOT entry
537 .long ? # 4 bytes offset into rela.plt */
538
539 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
540 {
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
543 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
544 0x07, 0xf1, /* br %r1 */
545 0x0d, 0x10, /* basr %r1,%r0 */
546 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
547 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
548 0x00, 0x00, /* padding */
549 0x00, 0x00, 0x00, 0x00, /* GOT offset */
550 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
551 };
552
553 /* Generic PLT pic entry. */
554 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
555 {
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
558 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
559 0x07, 0xf1, /* br %r1 */
560 0x0d, 0x10, /* basr %r1,%r0 */
561 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
562 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
563 0x00, 0x00, /* padding */
564 0x00, 0x00, 0x00, 0x00, /* GOT offset */
565 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
566 };
567
568 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
569 when generating the PLT slot with the GOT offset. */
570 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
571 {
572 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
573 0x07, 0xf1, /* br %r1 */
574 0x00, 0x00, 0x00, 0x00, /* padding */
575 0x00, 0x00,
576 0x0d, 0x10, /* basr %r1,%r0 */
577 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
578 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
579 0x00, 0x00, 0x00, 0x00,
580 0x00, 0x00, 0x00, 0x00
581 };
582
583 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
584 when generating the PLT slot with the GOT offset. */
585 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
586 {
587 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
588 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
589 0x07, 0xf1, /* br %r1 */
590 0x00, 0x00,
591 0x0d, 0x10, /* basr %r1,%r0 */
592 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
593 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
594 0x00, 0x00, 0x00, 0x00,
595 0x00, 0x00, 0x00, 0x00,
596 0x00, 0x00
597 };
598
599 /* The first PLT entry pushes the offset into the rela.plt
600 from R1 onto the stack at 8(15) and the loader object info
601 at 12(15), loads the loader address in R1 and jumps to it. */
602
603 /* The first entry in the PLT for PIC code:
604
605 PLT0:
606 ST 1,28(15) # R1 has offset into rela.plt
607 L 1,4(12) # Get loader ino(object struct address)
608 ST 1,24(15) # Store address
609 L 1,8(12) # Entry address of loader in R1
610 BR 1 # Jump to loader
611
612 The first entry in the PLT for static code:
613
614 PLT0:
615 ST 1,28(15) # R1 has offset into rela.plt
616 BASR 1,0
617 L 1,18(0,1) # Get address of GOT
618 MVC 24(4,15),4(1) # Move loader ino to stack
619 L 1,8(1) # Get address of loader
620 BR 1 # Jump to loader
621 .word 0 # filler
622 .long got # address of GOT */
623
624 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
625 {
626 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
627 0x0d, 0x10, /* basr %r1,%r0 */
628 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
629 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
630 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
631 0x07, 0xf1, /* br %r1 */
632 0x00, 0x00, 0x00, 0x00,
633 0x00, 0x00, 0x00, 0x00,
634 0x00, 0x00
635 };
636
637 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
638 {
639 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
640 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
641 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
642 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
643 0x07, 0xf1, /* br %r1 */
644 0x00, 0x00, 0x00, 0x00,
645 0x00, 0x00, 0x00, 0x00,
646 0x00, 0x00, 0x00, 0x00,
647 0x00, 0x00
648 };
649
650
651 /* s390 ELF linker hash entry. */
652
653 struct elf_s390_link_hash_entry
654 {
655 struct elf_link_hash_entry elf;
656
657 /* Number of GOTPLT references for a function. */
658 bfd_signed_vma gotplt_refcount;
659
660 #define GOT_UNKNOWN 0
661 #define GOT_NORMAL 1
662 #define GOT_TLS_GD 2
663 #define GOT_TLS_IE 3
664 #define GOT_TLS_IE_NLT 4
665 unsigned char tls_type;
666
667 /* For pointer equality reasons we might need to change the symbol
668 type from STT_GNU_IFUNC to STT_FUNC together with its value and
669 section entry. So after alloc_dynrelocs only these values should
670 be used. In order to check whether a symbol is IFUNC use
671 s390_is_ifunc_symbol_p. */
672 bfd_vma ifunc_resolver_address;
673 asection *ifunc_resolver_section;
674 };
675
676 #define elf_s390_hash_entry(ent) \
677 ((struct elf_s390_link_hash_entry *)(ent))
678
679 /* This structure represents an entry in the local PLT list needed for
680 local IFUNC symbols. */
681 struct plt_entry
682 {
683 /* The section of the local symbol.
684 Set in relocate_section and used in finish_dynamic_sections. */
685 asection *sec;
686
687 union
688 {
689 bfd_signed_vma refcount;
690 bfd_vma offset;
691 } plt;
692 };
693
694 /* NOTE: Keep this structure in sync with
695 the one declared in elf64-s390.c. */
696 struct elf_s390_obj_tdata
697 {
698 struct elf_obj_tdata root;
699
700 /* A local PLT is needed for ifunc symbols. */
701 struct plt_entry *local_plt;
702
703 /* TLS type for each local got entry. */
704 char *local_got_tls_type;
705 };
706
707 #define elf_s390_tdata(abfd) \
708 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
709
710 #define elf_s390_local_plt(abfd) \
711 (elf_s390_tdata (abfd)->local_plt)
712
713 #define elf_s390_local_got_tls_type(abfd) \
714 (elf_s390_tdata (abfd)->local_got_tls_type)
715
716 #define is_s390_elf(bfd) \
717 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
718 && elf_tdata (bfd) != NULL \
719 && elf_object_id (bfd) == S390_ELF_DATA)
720
721 static bfd_boolean
722 elf_s390_mkobject (bfd *abfd)
723 {
724 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
725 S390_ELF_DATA);
726 }
727
728 static bfd_boolean
729 elf_s390_object_p (bfd *abfd)
730 {
731 /* Set the right machine number for an s390 elf32 file. */
732 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
733 }
734
735 /* s390 ELF linker hash table. */
736
737 struct elf_s390_link_hash_table
738 {
739 struct elf_link_hash_table elf;
740
741 /* Short-cuts to get to dynamic linker sections. */
742 asection *irelifunc;
743
744 union
745 {
746 bfd_signed_vma refcount;
747 bfd_vma offset;
748 } tls_ldm_got;
749
750 /* Small local sym cache. */
751 struct sym_cache sym_cache;
752 };
753
754 /* Get the s390 ELF linker hash table from a link_info structure. */
755
756 #define elf_s390_hash_table(p) \
757 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
758 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
759
760 #undef ELF64
761 #include "elf-s390-common.c"
762
763 /* Create an entry in an s390 ELF linker hash table. */
764
765 static struct bfd_hash_entry *
766 link_hash_newfunc (struct bfd_hash_entry *entry,
767 struct bfd_hash_table *table,
768 const char *string)
769 {
770 /* Allocate the structure if it has not already been allocated by a
771 subclass. */
772 if (entry == NULL)
773 {
774 entry = bfd_hash_allocate (table,
775 sizeof (struct elf_s390_link_hash_entry));
776 if (entry == NULL)
777 return entry;
778 }
779
780 /* Call the allocation method of the superclass. */
781 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
782 if (entry != NULL)
783 {
784 struct elf_s390_link_hash_entry *eh;
785
786 eh = (struct elf_s390_link_hash_entry *) entry;
787 eh->gotplt_refcount = 0;
788 eh->tls_type = GOT_UNKNOWN;
789 eh->ifunc_resolver_address = 0;
790 eh->ifunc_resolver_section = NULL;
791 }
792
793 return entry;
794 }
795
796 /* Create an s390 ELF linker hash table. */
797
798 static struct bfd_link_hash_table *
799 elf_s390_link_hash_table_create (bfd *abfd)
800 {
801 struct elf_s390_link_hash_table *ret;
802 size_t amt = sizeof (struct elf_s390_link_hash_table);
803
804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
805 if (ret == NULL)
806 return NULL;
807
808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
809 sizeof (struct elf_s390_link_hash_entry),
810 S390_ELF_DATA))
811 {
812 free (ret);
813 return NULL;
814 }
815
816 return &ret->elf.root;
817 }
818
819 /* Copy the extra info we tack onto an elf_link_hash_entry. */
820
821 static void
822 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
823 struct elf_link_hash_entry *dir,
824 struct elf_link_hash_entry *ind)
825 {
826 struct elf_s390_link_hash_entry *edir, *eind;
827
828 edir = (struct elf_s390_link_hash_entry *) dir;
829 eind = (struct elf_s390_link_hash_entry *) ind;
830
831 if (ind->root.type == bfd_link_hash_indirect
832 && dir->got.refcount <= 0)
833 {
834 edir->tls_type = eind->tls_type;
835 eind->tls_type = GOT_UNKNOWN;
836 }
837
838 if (ELIMINATE_COPY_RELOCS
839 && ind->root.type != bfd_link_hash_indirect
840 && dir->dynamic_adjusted)
841 {
842 /* If called to transfer flags for a weakdef during processing
843 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
844 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
845 if (dir->versioned != versioned_hidden)
846 dir->ref_dynamic |= ind->ref_dynamic;
847 dir->ref_regular |= ind->ref_regular;
848 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
849 dir->needs_plt |= ind->needs_plt;
850 }
851 else
852 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
853 }
854
855 static int
856 elf_s390_tls_transition (struct bfd_link_info *info,
857 int r_type,
858 int is_local)
859 {
860 if (bfd_link_pic (info))
861 return r_type;
862
863 switch (r_type)
864 {
865 case R_390_TLS_GD32:
866 case R_390_TLS_IE32:
867 if (is_local)
868 return R_390_TLS_LE32;
869 return R_390_TLS_IE32;
870 case R_390_TLS_GOTIE32:
871 if (is_local)
872 return R_390_TLS_LE32;
873 return R_390_TLS_GOTIE32;
874 case R_390_TLS_LDM32:
875 return R_390_TLS_LE32;
876 }
877
878 return r_type;
879 }
880
881 /* Look through the relocs for a section during the first phase, and
882 allocate space in the global offset table or procedure linkage
883 table. */
884
885 static bfd_boolean
886 elf_s390_check_relocs (bfd *abfd,
887 struct bfd_link_info *info,
888 asection *sec,
889 const Elf_Internal_Rela *relocs)
890 {
891 struct elf_s390_link_hash_table *htab;
892 Elf_Internal_Shdr *symtab_hdr;
893 struct elf_link_hash_entry **sym_hashes;
894 const Elf_Internal_Rela *rel;
895 const Elf_Internal_Rela *rel_end;
896 asection *sreloc;
897 bfd_signed_vma *local_got_refcounts;
898 int tls_type, old_tls_type;
899 Elf_Internal_Sym *isym;
900
901 if (bfd_link_relocatable (info))
902 return TRUE;
903
904 BFD_ASSERT (is_s390_elf (abfd));
905
906 htab = elf_s390_hash_table (info);
907 symtab_hdr = &elf_symtab_hdr (abfd);
908 sym_hashes = elf_sym_hashes (abfd);
909 local_got_refcounts = elf_local_got_refcounts (abfd);
910
911 sreloc = NULL;
912
913 rel_end = relocs + sec->reloc_count;
914 for (rel = relocs; rel < rel_end; rel++)
915 {
916 unsigned int r_type;
917 unsigned int r_symndx;
918 struct elf_link_hash_entry *h;
919
920 r_symndx = ELF32_R_SYM (rel->r_info);
921
922 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
923 {
924 /* xgettext:c-format */
925 _bfd_error_handler (_("%pB: bad symbol index: %d"),
926 abfd, r_symndx);
927 return FALSE;
928 }
929
930 if (r_symndx < symtab_hdr->sh_info)
931 {
932 /* A local symbol. */
933 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
934 abfd, r_symndx);
935 if (isym == NULL)
936 return FALSE;
937
938 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
939 {
940 struct plt_entry *plt;
941
942 if (htab->elf.dynobj == NULL)
943 htab->elf.dynobj = abfd;
944
945 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
946 return FALSE;
947
948 if (local_got_refcounts == NULL)
949 {
950 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
951 return FALSE;
952 local_got_refcounts = elf_local_got_refcounts (abfd);
953 }
954 plt = elf_s390_local_plt (abfd);
955 plt[r_symndx].plt.refcount++;
956 }
957 h = NULL;
958 }
959 else
960 {
961 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
962 while (h->root.type == bfd_link_hash_indirect
963 || h->root.type == bfd_link_hash_warning)
964 h = (struct elf_link_hash_entry *) h->root.u.i.link;
965 }
966
967 /* Create got section and local_got_refcounts array if they
968 are needed. */
969 r_type = elf_s390_tls_transition (info,
970 ELF32_R_TYPE (rel->r_info),
971 h == NULL);
972 switch (r_type)
973 {
974 case R_390_GOT12:
975 case R_390_GOT16:
976 case R_390_GOT20:
977 case R_390_GOT32:
978 case R_390_GOTENT:
979 case R_390_GOTPLT12:
980 case R_390_GOTPLT16:
981 case R_390_GOTPLT20:
982 case R_390_GOTPLT32:
983 case R_390_GOTPLTENT:
984 case R_390_TLS_GD32:
985 case R_390_TLS_GOTIE12:
986 case R_390_TLS_GOTIE20:
987 case R_390_TLS_GOTIE32:
988 case R_390_TLS_IEENT:
989 case R_390_TLS_IE32:
990 case R_390_TLS_LDM32:
991 if (h == NULL
992 && local_got_refcounts == NULL)
993 {
994 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
995 return FALSE;
996 local_got_refcounts = elf_local_got_refcounts (abfd);
997 }
998 /* Fall through. */
999 case R_390_GOTOFF16:
1000 case R_390_GOTOFF32:
1001 case R_390_GOTPC:
1002 case R_390_GOTPCDBL:
1003 if (htab->elf.sgot == NULL)
1004 {
1005 if (htab->elf.dynobj == NULL)
1006 htab->elf.dynobj = abfd;
1007 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1008 return FALSE;
1009 }
1010 }
1011
1012 if (h != NULL)
1013 {
1014 if (htab->elf.dynobj == NULL)
1015 htab->elf.dynobj = abfd;
1016 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1017 return FALSE;
1018
1019 /* Make sure an IFUNC symbol defined in a non-shared object
1020 always gets a PLT slot. */
1021 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1022 {
1023 /* The symbol is called by the dynamic loader in order
1024 to resolve the relocation. So it is in fact also
1025 referenced. */
1026 h->ref_regular = 1;
1027 h->needs_plt = 1;
1028 }
1029 }
1030 switch (r_type)
1031 {
1032 case R_390_GOTPC:
1033 case R_390_GOTPCDBL:
1034 /* These relocs do not need a GOT slot. They just load the
1035 GOT pointer itself or address something else relative to
1036 the GOT. Since the GOT pointer has been set up above we
1037 are done. */
1038 break;
1039 case R_390_GOTOFF16:
1040 case R_390_GOTOFF32:
1041 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1042 break;
1043 /* Fall through. */
1044
1045 case R_390_PLT12DBL:
1046 case R_390_PLT16DBL:
1047 case R_390_PLT24DBL:
1048 case R_390_PLT32DBL:
1049 case R_390_PLT32:
1050 case R_390_PLTOFF16:
1051 case R_390_PLTOFF32:
1052 /* This symbol requires a procedure linkage table entry. We
1053 actually build the entry in adjust_dynamic_symbol,
1054 because this might be a case of linking PIC code which is
1055 never referenced by a dynamic object, in which case we
1056 don't need to generate a procedure linkage table entry
1057 after all. */
1058
1059 /* If this is a local symbol, we resolve it directly without
1060 creating a procedure linkage table entry. */
1061 if (h != NULL)
1062 {
1063 h->needs_plt = 1;
1064 h->plt.refcount += 1;
1065 }
1066 break;
1067
1068 case R_390_GOTPLT12:
1069 case R_390_GOTPLT16:
1070 case R_390_GOTPLT20:
1071 case R_390_GOTPLT32:
1072 case R_390_GOTPLTENT:
1073 /* This symbol requires either a procedure linkage table entry
1074 or an entry in the local got. We actually build the entry
1075 in adjust_dynamic_symbol because whether this is really a
1076 global reference can change and with it the fact if we have
1077 to create a plt entry or a local got entry. To be able to
1078 make a once global symbol a local one we have to keep track
1079 of the number of gotplt references that exist for this
1080 symbol. */
1081 if (h != NULL)
1082 {
1083 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1084 h->needs_plt = 1;
1085 h->plt.refcount += 1;
1086 }
1087 else
1088 local_got_refcounts[r_symndx] += 1;
1089 break;
1090
1091 case R_390_TLS_LDM32:
1092 htab->tls_ldm_got.refcount += 1;
1093 break;
1094
1095 case R_390_TLS_IE32:
1096 case R_390_TLS_GOTIE12:
1097 case R_390_TLS_GOTIE20:
1098 case R_390_TLS_GOTIE32:
1099 case R_390_TLS_IEENT:
1100 if (bfd_link_pic (info))
1101 info->flags |= DF_STATIC_TLS;
1102 /* Fall through. */
1103
1104 case R_390_GOT12:
1105 case R_390_GOT16:
1106 case R_390_GOT20:
1107 case R_390_GOT32:
1108 case R_390_GOTENT:
1109 case R_390_TLS_GD32:
1110 /* This symbol requires a global offset table entry. */
1111 switch (r_type)
1112 {
1113 default:
1114 case R_390_GOT12:
1115 case R_390_GOT16:
1116 case R_390_GOT20:
1117 case R_390_GOT32:
1118 case R_390_GOTENT:
1119 tls_type = GOT_NORMAL;
1120 break;
1121 case R_390_TLS_GD32:
1122 tls_type = GOT_TLS_GD;
1123 break;
1124 case R_390_TLS_IE32:
1125 case R_390_TLS_GOTIE32:
1126 tls_type = GOT_TLS_IE;
1127 break;
1128 case R_390_TLS_GOTIE12:
1129 case R_390_TLS_GOTIE20:
1130 case R_390_TLS_IEENT:
1131 tls_type = GOT_TLS_IE_NLT;
1132 break;
1133 }
1134
1135 if (h != NULL)
1136 {
1137 h->got.refcount += 1;
1138 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1139 }
1140 else
1141 {
1142 local_got_refcounts[r_symndx] += 1;
1143 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1144 }
1145 /* If a TLS symbol is accessed using IE at least once,
1146 there is no point to use dynamic model for it. */
1147 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1148 {
1149 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1150 {
1151 _bfd_error_handler
1152 /* xgettext:c-format */
1153 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1154 abfd, h->root.root.string);
1155 return FALSE;
1156 }
1157 if (old_tls_type > tls_type)
1158 tls_type = old_tls_type;
1159 }
1160
1161 if (old_tls_type != tls_type)
1162 {
1163 if (h != NULL)
1164 elf_s390_hash_entry (h)->tls_type = tls_type;
1165 else
1166 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1167 }
1168
1169 if (r_type != R_390_TLS_IE32)
1170 break;
1171 /* Fall through. */
1172
1173 case R_390_TLS_LE32:
1174 /* For static linking and executables this reloc will be
1175 calculated at linktime otherwise a TLS_TPOFF runtime
1176 reloc will be generated. */
1177 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1178 break;
1179
1180 if (!bfd_link_pic (info))
1181 break;
1182 info->flags |= DF_STATIC_TLS;
1183 /* Fall through. */
1184
1185 case R_390_8:
1186 case R_390_16:
1187 case R_390_32:
1188 case R_390_PC16:
1189 case R_390_PC12DBL:
1190 case R_390_PC16DBL:
1191 case R_390_PC24DBL:
1192 case R_390_PC32DBL:
1193 case R_390_PC32:
1194 if (h != NULL && bfd_link_executable (info))
1195 {
1196 /* If this reloc is in a read-only section, we might
1197 need a copy reloc. We can't check reliably at this
1198 stage whether the section is read-only, as input
1199 sections have not yet been mapped to output sections.
1200 Tentatively set the flag for now, and correct in
1201 adjust_dynamic_symbol. */
1202 h->non_got_ref = 1;
1203
1204 if (!bfd_link_pic (info))
1205 {
1206 /* We may need a .plt entry if the function this reloc
1207 refers to is in a shared lib. */
1208 h->plt.refcount += 1;
1209 }
1210 }
1211
1212 /* If we are creating a shared library, and this is a reloc
1213 against a global symbol, or a non PC relative reloc
1214 against a local symbol, then we need to copy the reloc
1215 into the shared library. However, if we are linking with
1216 -Bsymbolic, we do not need to copy a reloc against a
1217 global symbol which is defined in an object we are
1218 including in the link (i.e., DEF_REGULAR is set). At
1219 this point we have not seen all the input files, so it is
1220 possible that DEF_REGULAR is not set now but will be set
1221 later (it is never cleared). In case of a weak definition,
1222 DEF_REGULAR may be cleared later by a strong definition in
1223 a shared library. We account for that possibility below by
1224 storing information in the relocs_copied field of the hash
1225 table entry. A similar situation occurs when creating
1226 shared libraries and symbol visibility changes render the
1227 symbol local.
1228
1229 If on the other hand, we are creating an executable, we
1230 may need to keep relocations for symbols satisfied by a
1231 dynamic library if we manage to avoid copy relocs for the
1232 symbol. */
1233 if ((bfd_link_pic (info)
1234 && (sec->flags & SEC_ALLOC) != 0
1235 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1236 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1237 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1238 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1239 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1240 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1241 || (h != NULL
1242 && (! SYMBOLIC_BIND (info, h)
1243 || h->root.type == bfd_link_hash_defweak
1244 || !h->def_regular))))
1245 || (ELIMINATE_COPY_RELOCS
1246 && !bfd_link_pic (info)
1247 && (sec->flags & SEC_ALLOC) != 0
1248 && h != NULL
1249 && (h->root.type == bfd_link_hash_defweak
1250 || !h->def_regular)))
1251 {
1252 struct elf_dyn_relocs *p;
1253 struct elf_dyn_relocs **head;
1254
1255 /* We must copy these reloc types into the output file.
1256 Create a reloc section in dynobj and make room for
1257 this reloc. */
1258 if (sreloc == NULL)
1259 {
1260 if (htab->elf.dynobj == NULL)
1261 htab->elf.dynobj = abfd;
1262
1263 sreloc = _bfd_elf_make_dynamic_reloc_section
1264 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1265
1266 if (sreloc == NULL)
1267 return FALSE;
1268 }
1269
1270 /* If this is a global symbol, we count the number of
1271 relocations we need for this symbol. */
1272 if (h != NULL)
1273 {
1274 head = &h->dyn_relocs;
1275 }
1276 else
1277 {
1278 /* Track dynamic relocs needed for local syms too.
1279 We really need local syms available to do this
1280 easily. Oh well. */
1281 asection *s;
1282 void *vpp;
1283
1284 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1285 abfd, r_symndx);
1286 if (isym == NULL)
1287 return FALSE;
1288
1289 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1290 if (s == NULL)
1291 s = sec;
1292
1293 vpp = &elf_section_data (s)->local_dynrel;
1294 head = (struct elf_dyn_relocs **) vpp;
1295 }
1296
1297 p = *head;
1298 if (p == NULL || p->sec != sec)
1299 {
1300 size_t amt = sizeof *p;
1301
1302 p = ((struct elf_dyn_relocs *)
1303 bfd_alloc (htab->elf.dynobj, amt));
1304 if (p == NULL)
1305 return FALSE;
1306 p->next = *head;
1307 *head = p;
1308 p->sec = sec;
1309 p->count = 0;
1310 p->pc_count = 0;
1311 }
1312
1313 p->count += 1;
1314 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1315 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1316 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1317 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1318 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1319 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1320 p->pc_count += 1;
1321 }
1322 break;
1323
1324 /* This relocation describes the C++ object vtable hierarchy.
1325 Reconstruct it for later use during GC. */
1326 case R_390_GNU_VTINHERIT:
1327 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1328 return FALSE;
1329 break;
1330
1331 /* This relocation describes which C++ vtable entries are actually
1332 used. Record for later use during GC. */
1333 case R_390_GNU_VTENTRY:
1334 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1335 return FALSE;
1336 break;
1337
1338 default:
1339 break;
1340 }
1341 }
1342
1343 return TRUE;
1344 }
1345
1346 /* Return the section that should be marked against GC for a given
1347 relocation. */
1348
1349 static asection *
1350 elf_s390_gc_mark_hook (asection *sec,
1351 struct bfd_link_info *info,
1352 Elf_Internal_Rela *rel,
1353 struct elf_link_hash_entry *h,
1354 Elf_Internal_Sym *sym)
1355 {
1356 if (h != NULL)
1357 switch (ELF32_R_TYPE (rel->r_info))
1358 {
1359 case R_390_GNU_VTINHERIT:
1360 case R_390_GNU_VTENTRY:
1361 return NULL;
1362 }
1363 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1364
1365 }
1366
1367 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1368 entry but we found we will not create any. Called when we find we will
1369 not have any PLT for this symbol, by for example
1370 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1371 or elf_s390_size_dynamic_sections if no dynamic sections will be
1372 created (we're only linking static objects). */
1373
1374 static void
1375 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1376 {
1377 if (h->elf.root.type == bfd_link_hash_warning)
1378 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1379
1380 if (h->gotplt_refcount <= 0)
1381 return;
1382
1383 /* We simply add the number of gotplt references to the number
1384 * of got references for this symbol. */
1385 h->elf.got.refcount += h->gotplt_refcount;
1386 h->gotplt_refcount = -1;
1387 }
1388
1389 /* Adjust a symbol defined by a dynamic object and referenced by a
1390 regular object. The current definition is in some section of the
1391 dynamic object, but we're not including those sections. We have to
1392 change the definition to something the rest of the link can
1393 understand. */
1394
1395 static bfd_boolean
1396 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1397 struct elf_link_hash_entry *h)
1398 {
1399 struct elf_s390_link_hash_table *htab;
1400 asection *s, *srel;
1401
1402 /* STT_GNU_IFUNC symbol must go through PLT. */
1403 if (s390_is_ifunc_symbol_p (h))
1404 {
1405 /* All local STT_GNU_IFUNC references must be treated as local
1406 calls via local PLT. */
1407 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1408 {
1409 bfd_size_type pc_count = 0, count = 0;
1410 struct elf_dyn_relocs **pp;
1411 struct elf_dyn_relocs *p;
1412
1413 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1414 {
1415 pc_count += p->pc_count;
1416 p->count -= p->pc_count;
1417 p->pc_count = 0;
1418 count += p->count;
1419 if (p->count == 0)
1420 *pp = p->next;
1421 else
1422 pp = &p->next;
1423 }
1424
1425 if (pc_count || count)
1426 {
1427 h->needs_plt = 1;
1428 h->non_got_ref = 1;
1429 if (h->plt.refcount <= 0)
1430 h->plt.refcount = 1;
1431 else
1432 h->plt.refcount += 1;
1433 }
1434 }
1435
1436 if (h->plt.refcount <= 0)
1437 {
1438 h->plt.offset = (bfd_vma) -1;
1439 h->needs_plt = 0;
1440 }
1441 return TRUE;
1442 }
1443
1444 /* If this is a function, put it in the procedure linkage table. We
1445 will fill in the contents of the procedure linkage table later
1446 (although we could actually do it here). */
1447 if (h->type == STT_FUNC
1448 || h->needs_plt)
1449 {
1450 if (h->plt.refcount <= 0
1451 || SYMBOL_CALLS_LOCAL (info, h)
1452 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1453 && h->root.type != bfd_link_hash_undefweak))
1454 {
1455 /* This case can occur if we saw a PLT32 reloc in an input
1456 file, but the symbol was never referred to by a dynamic
1457 object, or if all references were garbage collected. In
1458 such a case, we don't actually need to build a procedure
1459 linkage table, and we can just do a PC32 reloc instead. */
1460 h->plt.offset = (bfd_vma) -1;
1461 h->needs_plt = 0;
1462 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1463 }
1464
1465 return TRUE;
1466 }
1467 else
1468 /* It's possible that we incorrectly decided a .plt reloc was
1469 needed for an R_390_PC32 reloc to a non-function sym in
1470 check_relocs. We can't decide accurately between function and
1471 non-function syms in check-relocs; Objects loaded later in
1472 the link may change h->type. So fix it now. */
1473 h->plt.offset = (bfd_vma) -1;
1474
1475 /* If this is a weak symbol, and there is a real definition, the
1476 processor independent code will have arranged for us to see the
1477 real definition first, and we can just use the same value. */
1478 if (h->is_weakalias)
1479 {
1480 struct elf_link_hash_entry *def = weakdef (h);
1481 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1482 h->root.u.def.section = def->root.u.def.section;
1483 h->root.u.def.value = def->root.u.def.value;
1484 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1485 h->non_got_ref = def->non_got_ref;
1486 return TRUE;
1487 }
1488
1489 /* This is a reference to a symbol defined by a dynamic object which
1490 is not a function. */
1491
1492 /* If we are creating a shared library, we must presume that the
1493 only references to the symbol are via the global offset table.
1494 For such cases we need not do anything here; the relocations will
1495 be handled correctly by relocate_section. */
1496 if (bfd_link_pic (info))
1497 return TRUE;
1498
1499 /* If there are no references to this symbol that do not use the
1500 GOT, we don't need to generate a copy reloc. */
1501 if (!h->non_got_ref)
1502 return TRUE;
1503
1504 /* If -z nocopyreloc was given, we won't generate them either. */
1505 if (info->nocopyreloc)
1506 {
1507 h->non_got_ref = 0;
1508 return TRUE;
1509 }
1510
1511 /* If we don't find any dynamic relocs in read-only sections, then
1512 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1513 if (ELIMINATE_COPY_RELOCS && !_bfd_elf_readonly_dynrelocs (h))
1514 {
1515 h->non_got_ref = 0;
1516 return TRUE;
1517 }
1518
1519 /* We must allocate the symbol in our .dynbss section, which will
1520 become part of the .bss section of the executable. There will be
1521 an entry for this symbol in the .dynsym section. The dynamic
1522 object will contain position independent code, so all references
1523 from the dynamic object to this symbol will go through the global
1524 offset table. The dynamic linker will use the .dynsym entry to
1525 determine the address it must put in the global offset table, so
1526 both the dynamic object and the regular object will refer to the
1527 same memory location for the variable. */
1528
1529 htab = elf_s390_hash_table (info);
1530
1531 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1532 copy the initial value out of the dynamic object and into the
1533 runtime process image. */
1534 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1535 {
1536 s = htab->elf.sdynrelro;
1537 srel = htab->elf.sreldynrelro;
1538 }
1539 else
1540 {
1541 s = htab->elf.sdynbss;
1542 srel = htab->elf.srelbss;
1543 }
1544 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1545 {
1546 srel->size += sizeof (Elf32_External_Rela);
1547 h->needs_copy = 1;
1548 }
1549
1550 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1551 }
1552
1553 /* Allocate space in .plt, .got and associated reloc sections for
1554 dynamic relocs. */
1555
1556 static bfd_boolean
1557 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1558 {
1559 struct bfd_link_info *info;
1560 struct elf_s390_link_hash_table *htab;
1561 struct elf_dyn_relocs *p;
1562
1563 if (h->root.type == bfd_link_hash_indirect)
1564 return TRUE;
1565
1566 info = (struct bfd_link_info *) inf;
1567 htab = elf_s390_hash_table (info);
1568
1569 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1570 here if it is defined and referenced in a non-shared object. */
1571 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1572 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1573 else if (htab->elf.dynamic_sections_created
1574 && h->plt.refcount > 0)
1575 {
1576 /* Make sure this symbol is output as a dynamic symbol.
1577 Undefined weak syms won't yet be marked as dynamic. */
1578 if (h->dynindx == -1
1579 && !h->forced_local)
1580 {
1581 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1582 return FALSE;
1583 }
1584
1585 if (bfd_link_pic (info)
1586 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1587 {
1588 asection *s = htab->elf.splt;
1589
1590 /* If this is the first .plt entry, make room for the special
1591 first entry. */
1592 if (s->size == 0)
1593 s->size += PLT_FIRST_ENTRY_SIZE;
1594
1595 h->plt.offset = s->size;
1596
1597 /* If this symbol is not defined in a regular file, and we are
1598 not generating a shared library, then set the symbol to this
1599 location in the .plt. This is required to make function
1600 pointers compare as equal between the normal executable and
1601 the shared library. */
1602 if (! bfd_link_pic (info)
1603 && !h->def_regular)
1604 {
1605 h->root.u.def.section = s;
1606 h->root.u.def.value = h->plt.offset;
1607 }
1608
1609 /* Make room for this entry. */
1610 s->size += PLT_ENTRY_SIZE;
1611
1612 /* We also need to make an entry in the .got.plt section, which
1613 will be placed in the .got section by the linker script. */
1614 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1615
1616 /* We also need to make an entry in the .rela.plt section. */
1617 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1618 }
1619 else
1620 {
1621 h->plt.offset = (bfd_vma) -1;
1622 h->needs_plt = 0;
1623 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1624 }
1625 }
1626 else
1627 {
1628 h->plt.offset = (bfd_vma) -1;
1629 h->needs_plt = 0;
1630 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1631 }
1632
1633 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1634 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1635 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1636 we can save the dynamic TLS relocation. */
1637 if (h->got.refcount > 0
1638 && !bfd_link_pic (info)
1639 && h->dynindx == -1
1640 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1641 {
1642 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1643 /* For the GOTIE access without a literal pool entry the offset has
1644 to be stored somewhere. The immediate value in the instruction
1645 is not bit enough so the value is stored in the got. */
1646 {
1647 h->got.offset = htab->elf.sgot->size;
1648 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1649 }
1650 else
1651 h->got.offset = (bfd_vma) -1;
1652 }
1653 else if (h->got.refcount > 0)
1654 {
1655 asection *s;
1656 bfd_boolean dyn;
1657 int tls_type = elf_s390_hash_entry(h)->tls_type;
1658
1659 /* Make sure this symbol is output as a dynamic symbol.
1660 Undefined weak syms won't yet be marked as dynamic. */
1661 if (h->dynindx == -1
1662 && !h->forced_local)
1663 {
1664 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1665 return FALSE;
1666 }
1667
1668 s = htab->elf.sgot;
1669 h->got.offset = s->size;
1670 s->size += GOT_ENTRY_SIZE;
1671 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1672 if (tls_type == GOT_TLS_GD)
1673 s->size += GOT_ENTRY_SIZE;
1674 dyn = htab->elf.dynamic_sections_created;
1675 /* R_390_TLS_IE32 needs one dynamic relocation,
1676 R_390_TLS_GD32 needs one if local symbol and two if global. */
1677 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1678 || tls_type >= GOT_TLS_IE)
1679 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1680 else if (tls_type == GOT_TLS_GD)
1681 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1682 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1683 || h->root.type != bfd_link_hash_undefweak)
1684 && (bfd_link_pic (info)
1685 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1686 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1687 }
1688 else
1689 h->got.offset = (bfd_vma) -1;
1690
1691 if (h->dyn_relocs == NULL)
1692 return TRUE;
1693
1694 /* In the shared -Bsymbolic case, discard space allocated for
1695 dynamic pc-relative relocs against symbols which turn out to be
1696 defined in regular objects. For the normal shared case, discard
1697 space for pc-relative relocs that have become local due to symbol
1698 visibility changes. */
1699
1700 if (bfd_link_pic (info))
1701 {
1702 if (SYMBOL_CALLS_LOCAL (info, h))
1703 {
1704 struct elf_dyn_relocs **pp;
1705
1706 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1707 {
1708 p->count -= p->pc_count;
1709 p->pc_count = 0;
1710 if (p->count == 0)
1711 *pp = p->next;
1712 else
1713 pp = &p->next;
1714 }
1715 }
1716
1717 /* Also discard relocs on undefined weak syms with non-default
1718 visibility. */
1719 if (h->dyn_relocs != NULL
1720 && h->root.type == bfd_link_hash_undefweak)
1721 {
1722 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1723 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1724 h->dyn_relocs = NULL;
1725
1726 /* Make sure undefined weak symbols are output as a dynamic
1727 symbol in PIEs. */
1728 else if (h->dynindx == -1
1729 && !h->forced_local)
1730 {
1731 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1732 return FALSE;
1733 }
1734 }
1735 }
1736 else if (ELIMINATE_COPY_RELOCS)
1737 {
1738 /* For the non-shared case, discard space for relocs against
1739 symbols which turn out to need copy relocs or are not
1740 dynamic. */
1741
1742 if (!h->non_got_ref
1743 && ((h->def_dynamic
1744 && !h->def_regular)
1745 || (htab->elf.dynamic_sections_created
1746 && (h->root.type == bfd_link_hash_undefweak
1747 || h->root.type == bfd_link_hash_undefined))))
1748 {
1749 /* Make sure this symbol is output as a dynamic symbol.
1750 Undefined weak syms won't yet be marked as dynamic. */
1751 if (h->dynindx == -1
1752 && !h->forced_local)
1753 {
1754 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1755 return FALSE;
1756 }
1757
1758 /* If that succeeded, we know we'll be keeping all the
1759 relocs. */
1760 if (h->dynindx != -1)
1761 goto keep;
1762 }
1763
1764 h->dyn_relocs = NULL;
1765
1766 keep: ;
1767 }
1768
1769 /* Finally, allocate space. */
1770 for (p = h->dyn_relocs; p != NULL; p = p->next)
1771 {
1772 asection *sreloc = elf_section_data (p->sec)->sreloc;
1773
1774 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1775 }
1776
1777 return TRUE;
1778 }
1779
1780 /* Set the sizes of the dynamic sections. */
1781
1782 static bfd_boolean
1783 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1784 struct bfd_link_info *info)
1785 {
1786 struct elf_s390_link_hash_table *htab;
1787 bfd *dynobj;
1788 asection *s;
1789 bfd_boolean relocs;
1790 bfd *ibfd;
1791
1792 htab = elf_s390_hash_table (info);
1793 dynobj = htab->elf.dynobj;
1794 if (dynobj == NULL)
1795 abort ();
1796
1797 if (htab->elf.dynamic_sections_created)
1798 {
1799 /* Set the contents of the .interp section to the interpreter. */
1800 if (bfd_link_executable (info) && !info->nointerp)
1801 {
1802 s = bfd_get_linker_section (dynobj, ".interp");
1803 if (s == NULL)
1804 abort ();
1805 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1806 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1807 }
1808 }
1809
1810 /* Set up .got offsets for local syms, and space for local dynamic
1811 relocs. */
1812 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1813 {
1814 bfd_signed_vma *local_got;
1815 bfd_signed_vma *end_local_got;
1816 char *local_tls_type;
1817 bfd_size_type locsymcount;
1818 Elf_Internal_Shdr *symtab_hdr;
1819 asection *srela;
1820 struct plt_entry *local_plt;
1821 unsigned int i;
1822
1823 if (! is_s390_elf (ibfd))
1824 continue;
1825
1826 for (s = ibfd->sections; s != NULL; s = s->next)
1827 {
1828 struct elf_dyn_relocs *p;
1829
1830 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1831 {
1832 if (!bfd_is_abs_section (p->sec)
1833 && bfd_is_abs_section (p->sec->output_section))
1834 {
1835 /* Input section has been discarded, either because
1836 it is a copy of a linkonce section or due to
1837 linker script /DISCARD/, so we'll be discarding
1838 the relocs too. */
1839 }
1840 else if (p->count != 0)
1841 {
1842 srela = elf_section_data (p->sec)->sreloc;
1843 srela->size += p->count * sizeof (Elf32_External_Rela);
1844 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1845 info->flags |= DF_TEXTREL;
1846 }
1847 }
1848 }
1849
1850 local_got = elf_local_got_refcounts (ibfd);
1851 if (!local_got)
1852 continue;
1853
1854 symtab_hdr = &elf_symtab_hdr (ibfd);
1855 locsymcount = symtab_hdr->sh_info;
1856 end_local_got = local_got + locsymcount;
1857 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1858 s = htab->elf.sgot;
1859 srela = htab->elf.srelgot;
1860 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1861 {
1862 if (*local_got > 0)
1863 {
1864 *local_got = s->size;
1865 s->size += GOT_ENTRY_SIZE;
1866 if (*local_tls_type == GOT_TLS_GD)
1867 s->size += GOT_ENTRY_SIZE;
1868 if (bfd_link_pic (info))
1869 srela->size += sizeof (Elf32_External_Rela);
1870 }
1871 else
1872 *local_got = (bfd_vma) -1;
1873 }
1874 local_plt = elf_s390_local_plt (ibfd);
1875 for (i = 0; i < symtab_hdr->sh_info; i++)
1876 {
1877 if (local_plt[i].plt.refcount > 0)
1878 {
1879 local_plt[i].plt.offset = htab->elf.iplt->size;
1880 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1881 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1882 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1883 }
1884 else
1885 local_plt[i].plt.offset = (bfd_vma) -1;
1886 }
1887 }
1888
1889 if (htab->tls_ldm_got.refcount > 0)
1890 {
1891 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1892 relocs. */
1893 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1894 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1895 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1896 }
1897 else
1898 htab->tls_ldm_got.offset = -1;
1899
1900 /* Allocate global sym .plt and .got entries, and space for global
1901 sym dynamic relocs. */
1902 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1903
1904 /* We now have determined the sizes of the various dynamic sections.
1905 Allocate memory for them. */
1906 relocs = FALSE;
1907 for (s = dynobj->sections; s != NULL; s = s->next)
1908 {
1909 if ((s->flags & SEC_LINKER_CREATED) == 0)
1910 continue;
1911
1912 if (s == htab->elf.splt
1913 || s == htab->elf.sgot
1914 || s == htab->elf.sgotplt
1915 || s == htab->elf.sdynbss
1916 || s == htab->elf.sdynrelro
1917 || s == htab->elf.iplt
1918 || s == htab->elf.igotplt
1919 || s == htab->irelifunc)
1920 {
1921 /* Strip this section if we don't need it; see the
1922 comment below. */
1923 }
1924 else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
1925 {
1926 if (s->size != 0)
1927 relocs = TRUE;
1928
1929 /* We use the reloc_count field as a counter if we need
1930 to copy relocs into the output file. */
1931 s->reloc_count = 0;
1932 }
1933 else
1934 {
1935 /* It's not one of our sections, so don't allocate space. */
1936 continue;
1937 }
1938
1939 if (s->size == 0)
1940 {
1941 /* If we don't need this section, strip it from the
1942 output file. This is to handle .rela.bss and
1943 .rela.plt. We must create it in
1944 create_dynamic_sections, because it must be created
1945 before the linker maps input sections to output
1946 sections. The linker does that before
1947 adjust_dynamic_symbol is called, and it is that
1948 function which decides whether anything needs to go
1949 into these sections. */
1950
1951 s->flags |= SEC_EXCLUDE;
1952 continue;
1953 }
1954
1955 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1956 continue;
1957
1958 /* Allocate memory for the section contents. We use bfd_zalloc
1959 here in case unused entries are not reclaimed before the
1960 section's contents are written out. This should not happen,
1961 but this way if it does, we get a R_390_NONE reloc instead
1962 of garbage. */
1963 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1964 if (s->contents == NULL)
1965 return FALSE;
1966 }
1967
1968 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
1969 }
1970
1971 /* Return the base VMA address which should be subtracted from real addresses
1972 when resolving @dtpoff relocation.
1973 This is PT_TLS segment p_vaddr. */
1974
1975 static bfd_vma
1976 dtpoff_base (struct bfd_link_info *info)
1977 {
1978 /* If tls_sec is NULL, we should have signalled an error already. */
1979 if (elf_hash_table (info)->tls_sec == NULL)
1980 return 0;
1981 return elf_hash_table (info)->tls_sec->vma;
1982 }
1983
1984 /* Return the relocation value for @tpoff relocation
1985 if STT_TLS virtual address is ADDRESS. */
1986
1987 static bfd_vma
1988 tpoff (struct bfd_link_info *info, bfd_vma address)
1989 {
1990 struct elf_link_hash_table *htab = elf_hash_table (info);
1991
1992 /* If tls_sec is NULL, we should have signalled an error already. */
1993 if (htab->tls_sec == NULL)
1994 return 0;
1995 return htab->tls_size + htab->tls_sec->vma - address;
1996 }
1997
1998 /* Complain if TLS instruction relocation is against an invalid
1999 instruction. */
2000
2001 static void
2002 invalid_tls_insn (bfd *input_bfd,
2003 asection *input_section,
2004 Elf_Internal_Rela *rel)
2005 {
2006 reloc_howto_type *howto;
2007
2008 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2009 _bfd_error_handler
2010 /* xgettext:c-format */
2011 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2012 input_bfd,
2013 input_section,
2014 (uint64_t) rel->r_offset,
2015 howto->name);
2016 bfd_set_error (bfd_error_bad_value);
2017 }
2018
2019 /* Relocate a 390 ELF section. */
2020
2021 static bfd_boolean
2022 elf_s390_relocate_section (bfd *output_bfd,
2023 struct bfd_link_info *info,
2024 bfd *input_bfd,
2025 asection *input_section,
2026 bfd_byte *contents,
2027 Elf_Internal_Rela *relocs,
2028 Elf_Internal_Sym *local_syms,
2029 asection **local_sections)
2030 {
2031 struct elf_s390_link_hash_table *htab;
2032 Elf_Internal_Shdr *symtab_hdr;
2033 struct elf_link_hash_entry **sym_hashes;
2034 bfd_vma *local_got_offsets;
2035 Elf_Internal_Rela *rel;
2036 Elf_Internal_Rela *relend;
2037
2038 if (!is_s390_elf (input_bfd))
2039 {
2040 bfd_set_error (bfd_error_wrong_format);
2041 return FALSE;
2042 }
2043
2044 htab = elf_s390_hash_table (info);
2045 symtab_hdr = &elf_symtab_hdr (input_bfd);
2046 sym_hashes = elf_sym_hashes (input_bfd);
2047 local_got_offsets = elf_local_got_offsets (input_bfd);
2048
2049 rel = relocs;
2050 relend = relocs + input_section->reloc_count;
2051 for (; rel < relend; rel++)
2052 {
2053 unsigned int r_type;
2054 reloc_howto_type *howto;
2055 unsigned long r_symndx;
2056 struct elf_link_hash_entry *h;
2057 Elf_Internal_Sym *sym;
2058 asection *sec;
2059 bfd_vma off;
2060 bfd_vma relocation;
2061 bfd_boolean unresolved_reloc;
2062 bfd_reloc_status_type r;
2063 int tls_type;
2064 asection *base_got = htab->elf.sgot;
2065 bfd_boolean resolved_to_zero;
2066
2067 r_type = ELF32_R_TYPE (rel->r_info);
2068 if (r_type == (int) R_390_GNU_VTINHERIT
2069 || r_type == (int) R_390_GNU_VTENTRY)
2070 continue;
2071 if (r_type >= (int) R_390_max)
2072 {
2073 bfd_set_error (bfd_error_bad_value);
2074 return FALSE;
2075 }
2076
2077 howto = elf_howto_table + r_type;
2078 r_symndx = ELF32_R_SYM (rel->r_info);
2079
2080 h = NULL;
2081 sym = NULL;
2082 sec = NULL;
2083 unresolved_reloc = FALSE;
2084 if (r_symndx < symtab_hdr->sh_info)
2085 {
2086 sym = local_syms + r_symndx;
2087 sec = local_sections[r_symndx];
2088 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2089 {
2090 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2091 if (local_plt == NULL)
2092 return FALSE;
2093
2094 /* Address of the PLT slot. */
2095 relocation = (htab->elf.iplt->output_section->vma
2096 + htab->elf.iplt->output_offset
2097 + local_plt[r_symndx].plt.offset);
2098
2099 switch (r_type)
2100 {
2101 case R_390_PLTOFF16:
2102 case R_390_PLTOFF32:
2103 relocation -= htab->elf.sgot->output_section->vma;
2104 break;
2105 case R_390_GOTPLT12:
2106 case R_390_GOTPLT16:
2107 case R_390_GOTPLT20:
2108 case R_390_GOTPLT32:
2109 case R_390_GOTPLTENT:
2110 case R_390_GOT12:
2111 case R_390_GOT16:
2112 case R_390_GOT20:
2113 case R_390_GOT32:
2114 case R_390_GOTENT:
2115 {
2116 /* Write the PLT slot address into the GOT slot. */
2117 bfd_put_32 (output_bfd, relocation,
2118 htab->elf.sgot->contents +
2119 local_got_offsets[r_symndx]);
2120 relocation = (local_got_offsets[r_symndx] +
2121 htab->elf.sgot->output_offset);
2122
2123 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2124 relocation += htab->elf.sgot->output_section->vma;
2125 break;
2126 }
2127 default:
2128 break;
2129 }
2130 /* The output section is needed later in
2131 finish_dynamic_section when creating the dynamic
2132 relocation. */
2133 local_plt[r_symndx].sec = sec;
2134 goto do_relocation;
2135 }
2136 else
2137 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2138 }
2139 else
2140 {
2141 bfd_boolean warned ATTRIBUTE_UNUSED;
2142 bfd_boolean ignored ATTRIBUTE_UNUSED;
2143
2144 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2145 r_symndx, symtab_hdr, sym_hashes,
2146 h, sec, relocation,
2147 unresolved_reloc, warned, ignored);
2148 }
2149
2150 if (sec != NULL && discarded_section (sec))
2151 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2152 rel, 1, relend, howto, 0, contents);
2153
2154 if (bfd_link_relocatable (info))
2155 continue;
2156
2157 resolved_to_zero = (h != NULL
2158 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2159
2160 switch (r_type)
2161 {
2162 case R_390_GOTPLT12:
2163 case R_390_GOTPLT16:
2164 case R_390_GOTPLT20:
2165 case R_390_GOTPLT32:
2166 case R_390_GOTPLTENT:
2167 /* There are three cases for a GOTPLT relocation. 1) The
2168 relocation is against the jump slot entry of a plt that
2169 will get emitted to the output file. 2) The relocation
2170 is against the jump slot of a plt entry that has been
2171 removed. elf_s390_adjust_gotplt has created a GOT entry
2172 as replacement. 3) The relocation is against a local symbol.
2173 Cases 2) and 3) are the same as the GOT relocation code
2174 so we just have to test for case 1 and fall through for
2175 the other two. */
2176 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2177 {
2178 bfd_vma plt_index;
2179
2180 if (s390_is_ifunc_symbol_p (h))
2181 {
2182 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2183 relocation = (plt_index * GOT_ENTRY_SIZE +
2184 htab->elf.igotplt->output_offset);
2185 if (r_type == R_390_GOTPLTENT)
2186 relocation += htab->elf.igotplt->output_section->vma;
2187 }
2188 else
2189 {
2190 /* Calc. index no.
2191 Current offset - size first entry / entry size. */
2192 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2193 PLT_ENTRY_SIZE;
2194
2195 /* Offset in GOT is PLT index plus GOT headers(3)
2196 times 4, addr & GOT addr. */
2197 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2198 if (r_type == R_390_GOTPLTENT)
2199 relocation += htab->elf.sgot->output_section->vma;
2200 }
2201 unresolved_reloc = FALSE;
2202
2203 }
2204 /* Fall through. */
2205
2206 case R_390_GOT12:
2207 case R_390_GOT16:
2208 case R_390_GOT20:
2209 case R_390_GOT32:
2210 case R_390_GOTENT:
2211 /* Relocation is to the entry for this symbol in the global
2212 offset table. */
2213 if (base_got == NULL)
2214 abort ();
2215
2216 if (h != NULL)
2217 {
2218 bfd_boolean dyn;
2219
2220 off = h->got.offset;
2221 dyn = htab->elf.dynamic_sections_created;
2222
2223 if (s390_is_ifunc_symbol_p (h))
2224 {
2225 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2226 if (off == (bfd_vma)-1)
2227 {
2228 /* No explicit GOT usage so redirect to the
2229 got.iplt slot. */
2230 base_got = htab->elf.igotplt;
2231 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2232 }
2233 else
2234 {
2235 /* Explicit GOT slots must contain the address
2236 of the PLT slot. This will be handled in
2237 finish_dynamic_symbol. */
2238 }
2239 }
2240 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2241 bfd_link_pic (info),
2242 h)
2243 || (bfd_link_pic (info)
2244 && SYMBOL_REFERENCES_LOCAL (info, h))
2245 || (ELF_ST_VISIBILITY (h->other)
2246 && h->root.type == bfd_link_hash_undefweak))
2247
2248 {
2249 /* This is actually a static link, or it is a
2250 -Bsymbolic link and the symbol is defined
2251 locally, or the symbol was forced to be local
2252 because of a version file. We must initialize
2253 this entry in the global offset table. Since the
2254 offset must always be a multiple of 2, we use the
2255 least significant bit to record whether we have
2256 initialized it already.
2257
2258 When doing a dynamic link, we create a .rel.got
2259 relocation entry to initialize the value. This
2260 is done in the finish_dynamic_symbol routine. */
2261 if ((off & 1) != 0)
2262 off &= ~1;
2263 else
2264 {
2265 bfd_put_32 (output_bfd, relocation,
2266 base_got->contents + off);
2267 h->got.offset |= 1;
2268 }
2269
2270 if ((h->def_regular
2271 && bfd_link_pic (info)
2272 && SYMBOL_REFERENCES_LOCAL (info, h))
2273 /* lrl rx,sym@GOTENT -> larl rx, sym */
2274 && ((r_type == R_390_GOTENT
2275 && (bfd_get_16 (input_bfd,
2276 contents + rel->r_offset - 2)
2277 & 0xff0f) == 0xc40d)
2278 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2279 || (r_type == R_390_GOT20
2280 && (bfd_get_32 (input_bfd,
2281 contents + rel->r_offset - 2)
2282 & 0xff00f000) == 0xe300c000
2283 && bfd_get_8 (input_bfd,
2284 contents + rel->r_offset + 3) == 0x58)))
2285 {
2286 unsigned short new_insn =
2287 (0xc000 | (bfd_get_8 (input_bfd,
2288 contents + rel->r_offset - 1) & 0xf0));
2289 bfd_put_16 (output_bfd, new_insn,
2290 contents + rel->r_offset - 2);
2291 r_type = R_390_PC32DBL;
2292 rel->r_addend = 2;
2293 howto = elf_howto_table + r_type;
2294 relocation = h->root.u.def.value
2295 + h->root.u.def.section->output_section->vma
2296 + h->root.u.def.section->output_offset;
2297 goto do_relocation;
2298 }
2299 }
2300 else
2301 unresolved_reloc = FALSE;
2302 }
2303 else
2304 {
2305 if (local_got_offsets == NULL)
2306 abort ();
2307
2308 off = local_got_offsets[r_symndx];
2309
2310 /* The offset must always be a multiple of 4. We use
2311 the least significant bit to record whether we have
2312 already generated the necessary reloc. */
2313 if ((off & 1) != 0)
2314 off &= ~1;
2315 else
2316 {
2317 bfd_put_32 (output_bfd, relocation,
2318 htab->elf.sgot->contents + off);
2319
2320 if (bfd_link_pic (info))
2321 {
2322 asection *srelgot;
2323 Elf_Internal_Rela outrel;
2324 bfd_byte *loc;
2325
2326 srelgot = htab->elf.srelgot;
2327 if (srelgot == NULL)
2328 abort ();
2329
2330 outrel.r_offset = (htab->elf.sgot->output_section->vma
2331 + htab->elf.sgot->output_offset
2332 + off);
2333 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2334 outrel.r_addend = relocation;
2335 loc = srelgot->contents;
2336 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2337 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2338 }
2339
2340 local_got_offsets[r_symndx] |= 1;
2341 }
2342 }
2343
2344 if (off >= (bfd_vma) -2)
2345 abort ();
2346
2347 relocation = base_got->output_offset + off;
2348
2349 /* For @GOTENT the relocation is against the offset between
2350 the instruction and the symbols entry in the GOT and not
2351 between the start of the GOT and the symbols entry. We
2352 add the vma of the GOT to get the correct value. */
2353 if ( r_type == R_390_GOTENT
2354 || r_type == R_390_GOTPLTENT)
2355 relocation += base_got->output_section->vma;
2356
2357 break;
2358
2359 case R_390_GOTOFF16:
2360 case R_390_GOTOFF32:
2361 /* Relocation is relative to the start of the global offset
2362 table. */
2363
2364 if (h != NULL
2365 && s390_is_ifunc_symbol_p (h)
2366 && h->def_regular
2367 && !bfd_link_executable (info))
2368 {
2369 relocation = (htab->elf.iplt->output_section->vma
2370 + htab->elf.iplt->output_offset
2371 + h->plt.offset
2372 - htab->elf.sgot->output_section->vma);
2373 goto do_relocation;
2374 }
2375
2376 /* Note that sgot->output_offset is not involved in this
2377 calculation. We always want the start of .got. If we
2378 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2379 permitted by the ABI, we might have to change this
2380 calculation. */
2381 relocation -= htab->elf.sgot->output_section->vma;
2382 break;
2383
2384 case R_390_GOTPC:
2385 case R_390_GOTPCDBL:
2386 /* Use global offset table as symbol value. */
2387 relocation = htab->elf.sgot->output_section->vma;
2388 unresolved_reloc = FALSE;
2389 break;
2390
2391 case R_390_PLT12DBL:
2392 case R_390_PLT16DBL:
2393 case R_390_PLT24DBL:
2394 case R_390_PLT32DBL:
2395 case R_390_PLT32:
2396 /* Relocation is to the entry for this symbol in the
2397 procedure linkage table. */
2398
2399 /* Resolve a PLT32 reloc against a local symbol directly,
2400 without using the procedure linkage table. */
2401 if (h == NULL)
2402 break;
2403
2404 if (h->plt.offset == (bfd_vma) -1
2405 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2406 {
2407 /* We didn't make a PLT entry for this symbol. This
2408 happens when statically linking PIC code, or when
2409 using -Bsymbolic. */
2410 break;
2411 }
2412
2413 if (s390_is_ifunc_symbol_p (h))
2414 relocation = (htab->elf.iplt->output_section->vma
2415 + htab->elf.iplt->output_offset
2416 + h->plt.offset);
2417 else
2418 relocation = (htab->elf.splt->output_section->vma
2419 + htab->elf.splt->output_offset
2420 + h->plt.offset);
2421 unresolved_reloc = FALSE;
2422 break;
2423
2424 case R_390_PLTOFF16:
2425 case R_390_PLTOFF32:
2426 /* Relocation is to the entry for this symbol in the
2427 procedure linkage table relative to the start of the GOT. */
2428
2429 /* For local symbols or if we didn't make a PLT entry for
2430 this symbol resolve the symbol directly. */
2431 if (h == NULL
2432 || h->plt.offset == (bfd_vma) -1
2433 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2434 {
2435 relocation -= htab->elf.sgot->output_section->vma;
2436 break;
2437 }
2438
2439 if (s390_is_ifunc_symbol_p (h))
2440 relocation = (htab->elf.iplt->output_section->vma
2441 + htab->elf.iplt->output_offset
2442 + h->plt.offset
2443 - htab->elf.sgot->output_section->vma);
2444 else
2445 relocation = (htab->elf.splt->output_section->vma
2446 + htab->elf.splt->output_offset
2447 + h->plt.offset
2448 - htab->elf.sgot->output_section->vma);
2449 unresolved_reloc = FALSE;
2450 break;
2451
2452 case R_390_PC16:
2453 case R_390_PC12DBL:
2454 case R_390_PC16DBL:
2455 case R_390_PC24DBL:
2456 case R_390_PC32DBL:
2457 case R_390_PC32:
2458 if (h != NULL
2459 && s390_is_ifunc_symbol_p (h)
2460 && h->def_regular
2461 && !bfd_link_executable (info))
2462 {
2463 /* This will not work our if the function does not
2464 happen to set up the GOT pointer for some other
2465 reason. 31 bit PLT entries require r12 to hold the
2466 GOT pointer.
2467 FIXME: Implement an errorcheck.
2468 NOTE: It will work when brasl is not available
2469 (e.g. with -m31 -march=g5) since a local function
2470 call then does use GOTOFF which implies r12 being set
2471 up. */
2472 relocation = (htab->elf.iplt->output_section->vma
2473 + htab->elf.iplt->output_offset
2474 + h ->plt.offset);
2475 goto do_relocation;
2476 }
2477 /* Fall through. */
2478
2479 case R_390_8:
2480 case R_390_16:
2481 case R_390_32:
2482 if ((input_section->flags & SEC_ALLOC) == 0)
2483 break;
2484
2485 if (h != NULL
2486 && s390_is_ifunc_symbol_p (h)
2487 && h->def_regular)
2488 {
2489 if (!bfd_link_pic (info))
2490 {
2491 /* For a non-shared object STT_GNU_IFUNC symbol must
2492 go through PLT. */
2493 relocation = (htab->elf.iplt->output_section->vma
2494 + htab->elf.iplt->output_offset
2495 + h ->plt.offset);
2496 goto do_relocation;
2497 }
2498 else
2499 {
2500 /* For shared objects a runtime relocation is needed. */
2501
2502 Elf_Internal_Rela outrel;
2503 asection *sreloc;
2504
2505 /* Need a dynamic relocation to get the real function
2506 address. */
2507 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2508 info,
2509 input_section,
2510 rel->r_offset);
2511 if (outrel.r_offset == (bfd_vma) -1
2512 || outrel.r_offset == (bfd_vma) -2)
2513 abort ();
2514
2515 outrel.r_offset += (input_section->output_section->vma
2516 + input_section->output_offset);
2517
2518 if (h->dynindx == -1
2519 || h->forced_local
2520 || bfd_link_executable (info))
2521 {
2522 /* This symbol is resolved locally. */
2523 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2524 outrel.r_addend = (h->root.u.def.value
2525 + h->root.u.def.section->output_section->vma
2526 + h->root.u.def.section->output_offset);
2527 }
2528 else
2529 {
2530 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2531 outrel.r_addend = 0;
2532 }
2533
2534 sreloc = htab->elf.irelifunc;
2535 elf_append_rela (output_bfd, sreloc, &outrel);
2536
2537 /* If this reloc is against an external symbol, we
2538 do not want to fiddle with the addend. Otherwise,
2539 we need to include the symbol value so that it
2540 becomes an addend for the dynamic reloc. For an
2541 internal symbol, we have updated addend. */
2542 continue;
2543 }
2544 }
2545
2546 if ((bfd_link_pic (info)
2547 && (h == NULL
2548 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2549 && !resolved_to_zero)
2550 || h->root.type != bfd_link_hash_undefweak)
2551 && ((r_type != R_390_PC16
2552 && r_type != R_390_PC12DBL
2553 && r_type != R_390_PC16DBL
2554 && r_type != R_390_PC24DBL
2555 && r_type != R_390_PC32DBL
2556 && r_type != R_390_PC32)
2557 || !SYMBOL_CALLS_LOCAL (info, h)))
2558 || (ELIMINATE_COPY_RELOCS
2559 && !bfd_link_pic (info)
2560 && h != NULL
2561 && h->dynindx != -1
2562 && !h->non_got_ref
2563 && ((h->def_dynamic
2564 && !h->def_regular)
2565 || h->root.type == bfd_link_hash_undefweak
2566 || h->root.type == bfd_link_hash_undefined)))
2567 {
2568 Elf_Internal_Rela outrel;
2569 bfd_boolean skip, relocate;
2570 asection *sreloc;
2571 bfd_byte *loc;
2572
2573 /* When generating a shared object, these relocations
2574 are copied into the output file to be resolved at run
2575 time. */
2576
2577 skip = FALSE;
2578 relocate = FALSE;
2579
2580 outrel.r_offset =
2581 _bfd_elf_section_offset (output_bfd, info, input_section,
2582 rel->r_offset);
2583 if (outrel.r_offset == (bfd_vma) -1)
2584 skip = TRUE;
2585 else if (outrel.r_offset == (bfd_vma) -2)
2586 skip = TRUE, relocate = TRUE;
2587 outrel.r_offset += (input_section->output_section->vma
2588 + input_section->output_offset);
2589
2590 if (skip)
2591 memset (&outrel, 0, sizeof outrel);
2592 else if (h != NULL
2593 && h->dynindx != -1
2594 && (r_type == R_390_PC16
2595 || r_type == R_390_PC12DBL
2596 || r_type == R_390_PC16DBL
2597 || r_type == R_390_PC24DBL
2598 || r_type == R_390_PC32DBL
2599 || r_type == R_390_PC32
2600 || !bfd_link_pic (info)
2601 || !SYMBOLIC_BIND (info, h)
2602 || !h->def_regular))
2603 {
2604 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2605 outrel.r_addend = rel->r_addend;
2606 }
2607 else
2608 {
2609 /* This symbol is local, or marked to become local. */
2610 outrel.r_addend = relocation + rel->r_addend;
2611 if (r_type == R_390_32)
2612 {
2613 relocate = TRUE;
2614 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2615 }
2616 else
2617 {
2618 long sindx;
2619
2620 if (bfd_is_abs_section (sec))
2621 sindx = 0;
2622 else if (sec == NULL || sec->owner == NULL)
2623 {
2624 bfd_set_error(bfd_error_bad_value);
2625 return FALSE;
2626 }
2627 else
2628 {
2629 asection *osec;
2630
2631 osec = sec->output_section;
2632 sindx = elf_section_data (osec)->dynindx;
2633 if (sindx == 0)
2634 {
2635 osec = htab->elf.text_index_section;
2636 sindx = elf_section_data (osec)->dynindx;
2637 }
2638 BFD_ASSERT (sindx != 0);
2639
2640 /* We are turning this relocation into one
2641 against a section symbol, so subtract out
2642 the output section's address but not the
2643 offset of the input section in the output
2644 section. */
2645 outrel.r_addend -= osec->vma;
2646 }
2647 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2648 }
2649 }
2650
2651 sreloc = elf_section_data (input_section)->sreloc;
2652 if (sreloc == NULL)
2653 abort ();
2654
2655 loc = sreloc->contents;
2656 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2657 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2658
2659 /* If this reloc is against an external symbol, we do
2660 not want to fiddle with the addend. Otherwise, we
2661 need to include the symbol value so that it becomes
2662 an addend for the dynamic reloc. */
2663 if (! relocate)
2664 continue;
2665 }
2666 break;
2667
2668 /* Relocations for tls literal pool entries. */
2669 case R_390_TLS_IE32:
2670 if (bfd_link_pic (info))
2671 {
2672 Elf_Internal_Rela outrel;
2673 asection *sreloc;
2674 bfd_byte *loc;
2675
2676 outrel.r_offset = rel->r_offset
2677 + input_section->output_section->vma
2678 + input_section->output_offset;
2679 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2680 sreloc = elf_section_data (input_section)->sreloc;
2681 if (sreloc == NULL)
2682 abort ();
2683 loc = sreloc->contents;
2684 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2685 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2686 }
2687 /* Fall through. */
2688
2689 case R_390_TLS_GD32:
2690 case R_390_TLS_GOTIE32:
2691 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2692 tls_type = GOT_UNKNOWN;
2693 if (h == NULL && local_got_offsets)
2694 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2695 else if (h != NULL)
2696 {
2697 tls_type = elf_s390_hash_entry(h)->tls_type;
2698 if (!bfd_link_pic (info)
2699 && h->dynindx == -1
2700 && tls_type >= GOT_TLS_IE)
2701 r_type = R_390_TLS_LE32;
2702 }
2703 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2704 r_type = R_390_TLS_IE32;
2705
2706 if (r_type == R_390_TLS_LE32)
2707 {
2708 /* This relocation gets optimized away by the local exec
2709 access optimization. */
2710 BFD_ASSERT (! unresolved_reloc);
2711 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2712 contents + rel->r_offset);
2713 continue;
2714 }
2715
2716 if (htab->elf.sgot == NULL)
2717 abort ();
2718
2719 if (h != NULL)
2720 off = h->got.offset;
2721 else
2722 {
2723 if (local_got_offsets == NULL)
2724 abort ();
2725
2726 off = local_got_offsets[r_symndx];
2727 }
2728
2729 emit_tls_relocs:
2730
2731 if ((off & 1) != 0)
2732 off &= ~1;
2733 else
2734 {
2735 Elf_Internal_Rela outrel;
2736 bfd_byte *loc;
2737 int dr_type, indx;
2738
2739 if (htab->elf.srelgot == NULL)
2740 abort ();
2741
2742 outrel.r_offset = (htab->elf.sgot->output_section->vma
2743 + htab->elf.sgot->output_offset + off);
2744
2745 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2746 if (r_type == R_390_TLS_GD32)
2747 dr_type = R_390_TLS_DTPMOD;
2748 else
2749 dr_type = R_390_TLS_TPOFF;
2750 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2751 outrel.r_addend = relocation - dtpoff_base (info);
2752 else
2753 outrel.r_addend = 0;
2754 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2755 loc = htab->elf.srelgot->contents;
2756 loc += htab->elf.srelgot->reloc_count++
2757 * sizeof (Elf32_External_Rela);
2758 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2759
2760 if (r_type == R_390_TLS_GD32)
2761 {
2762 if (indx == 0)
2763 {
2764 BFD_ASSERT (! unresolved_reloc);
2765 bfd_put_32 (output_bfd,
2766 relocation - dtpoff_base (info),
2767 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2768 }
2769 else
2770 {
2771 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2772 outrel.r_offset += GOT_ENTRY_SIZE;
2773 outrel.r_addend = 0;
2774 htab->elf.srelgot->reloc_count++;
2775 loc += sizeof (Elf32_External_Rela);
2776 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2777 }
2778 }
2779
2780 if (h != NULL)
2781 h->got.offset |= 1;
2782 else
2783 local_got_offsets[r_symndx] |= 1;
2784 }
2785
2786 if (off >= (bfd_vma) -2)
2787 abort ();
2788 if (r_type == ELF32_R_TYPE (rel->r_info))
2789 {
2790 relocation = htab->elf.sgot->output_offset + off;
2791 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2792 relocation += htab->elf.sgot->output_section->vma;
2793 unresolved_reloc = FALSE;
2794 }
2795 else
2796 {
2797 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2798 contents + rel->r_offset);
2799 continue;
2800 }
2801 break;
2802
2803 case R_390_TLS_GOTIE12:
2804 case R_390_TLS_GOTIE20:
2805 case R_390_TLS_IEENT:
2806 if (h == NULL)
2807 {
2808 if (local_got_offsets == NULL)
2809 abort();
2810 off = local_got_offsets[r_symndx];
2811 if (bfd_link_pic (info))
2812 goto emit_tls_relocs;
2813 }
2814 else
2815 {
2816 off = h->got.offset;
2817 tls_type = elf_s390_hash_entry(h)->tls_type;
2818 if (bfd_link_pic (info)
2819 || h->dynindx != -1
2820 || tls_type < GOT_TLS_IE)
2821 goto emit_tls_relocs;
2822 }
2823
2824 if (htab->elf.sgot == NULL)
2825 abort ();
2826
2827 BFD_ASSERT (! unresolved_reloc);
2828 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2829 htab->elf.sgot->contents + off);
2830 relocation = htab->elf.sgot->output_offset + off;
2831 if (r_type == R_390_TLS_IEENT)
2832 relocation += htab->elf.sgot->output_section->vma;
2833 unresolved_reloc = FALSE;
2834 break;
2835
2836 case R_390_TLS_LDM32:
2837 if (! bfd_link_pic (info))
2838 /* The literal pool entry this relocation refers to gets ignored
2839 by the optimized code of the local exec model. Do nothing
2840 and the value will turn out zero. */
2841 continue;
2842
2843 if (htab->elf.sgot == NULL)
2844 abort ();
2845
2846 off = htab->tls_ldm_got.offset;
2847 if (off & 1)
2848 off &= ~1;
2849 else
2850 {
2851 Elf_Internal_Rela outrel;
2852 bfd_byte *loc;
2853
2854 if (htab->elf.srelgot == NULL)
2855 abort ();
2856
2857 outrel.r_offset = (htab->elf.sgot->output_section->vma
2858 + htab->elf.sgot->output_offset + off);
2859
2860 bfd_put_32 (output_bfd, 0,
2861 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2862 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2863 outrel.r_addend = 0;
2864 loc = htab->elf.srelgot->contents;
2865 loc += htab->elf.srelgot->reloc_count++
2866 * sizeof (Elf32_External_Rela);
2867 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2868 htab->tls_ldm_got.offset |= 1;
2869 }
2870 relocation = htab->elf.sgot->output_offset + off;
2871 unresolved_reloc = FALSE;
2872 break;
2873
2874 case R_390_TLS_LE32:
2875 if (bfd_link_dll (info))
2876 {
2877 /* Linking a shared library with non-fpic code requires
2878 a R_390_TLS_TPOFF relocation. */
2879 Elf_Internal_Rela outrel;
2880 asection *sreloc;
2881 bfd_byte *loc;
2882 int indx;
2883
2884 outrel.r_offset = rel->r_offset
2885 + input_section->output_section->vma
2886 + input_section->output_offset;
2887 if (h != NULL && h->dynindx != -1)
2888 indx = h->dynindx;
2889 else
2890 indx = 0;
2891 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2892 if (indx == 0)
2893 outrel.r_addend = relocation - dtpoff_base (info);
2894 else
2895 outrel.r_addend = 0;
2896 sreloc = elf_section_data (input_section)->sreloc;
2897 if (sreloc == NULL)
2898 abort ();
2899 loc = sreloc->contents;
2900 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2901 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2902 }
2903 else
2904 {
2905 BFD_ASSERT (! unresolved_reloc);
2906 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2907 contents + rel->r_offset);
2908 }
2909 continue;
2910
2911 case R_390_TLS_LDO32:
2912 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
2913 relocation -= dtpoff_base (info);
2914 else
2915 /* When converting LDO to LE, we must negate. */
2916 relocation = -tpoff (info, relocation);
2917 break;
2918
2919 /* Relocations for tls instructions. */
2920 case R_390_TLS_LOAD:
2921 case R_390_TLS_GDCALL:
2922 case R_390_TLS_LDCALL:
2923 tls_type = GOT_UNKNOWN;
2924 if (h == NULL && local_got_offsets)
2925 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2926 else if (h != NULL)
2927 tls_type = elf_s390_hash_entry(h)->tls_type;
2928
2929 if (tls_type == GOT_TLS_GD)
2930 continue;
2931
2932 if (r_type == R_390_TLS_LOAD)
2933 {
2934 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
2935 {
2936 /* IE->LE transition. Four valid cases:
2937 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2938 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2939 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2940 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2941 unsigned int insn, ry;
2942
2943 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2944 if ((insn & 0xff00f000) == 0x58000000)
2945 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2946 ry = (insn & 0x000f0000);
2947 else if ((insn & 0xff0f0000) == 0x58000000)
2948 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2949 ry = (insn & 0x0000f000) << 4;
2950 else if ((insn & 0xff00f000) == 0x5800c000)
2951 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2952 ry = (insn & 0x000f0000);
2953 else if ((insn & 0xff0f0000) == 0x580c0000)
2954 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2955 ry = (insn & 0x0000f000) << 4;
2956 else
2957 {
2958 invalid_tls_insn (input_bfd, input_section, rel);
2959 return FALSE;
2960 }
2961 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2962 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2963 }
2964 }
2965 else if (r_type == R_390_TLS_GDCALL)
2966 {
2967 unsigned int insn;
2968
2969 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2970 if ((insn & 0xff000fff) != 0x4d000000 &&
2971 (insn & 0xffff0000) != 0xc0e50000 &&
2972 (insn & 0xff000000) != 0x0d000000)
2973 {
2974 invalid_tls_insn (input_bfd, input_section, rel);
2975 return FALSE;
2976 }
2977 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
2978 {
2979 if ((insn & 0xff000000) == 0x0d000000)
2980 {
2981 /* GD->LE transition.
2982 basr rx, ry -> nopr r7 */
2983 insn = 0x07070000 | (insn & 0xffff);
2984 }
2985 else if ((insn & 0xff000000) == 0x4d000000)
2986 {
2987 /* GD->LE transition.
2988 bas %r14,0(%rx,%r13) -> bc 0,0 */
2989 insn = 0x47000000;
2990 }
2991 else
2992 {
2993 /* GD->LE transition.
2994 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
2995 insn = 0xc0040000;
2996 bfd_put_16 (output_bfd, 0x0000,
2997 contents + rel->r_offset + 4);
2998 }
2999 }
3000 else
3001 {
3002 /* If basr is used in the pic case to invoke
3003 _tls_get_offset, something went wrong before. */
3004 if ((insn & 0xff000000) == 0x0d000000)
3005 {
3006 invalid_tls_insn (input_bfd, input_section, rel);
3007 return FALSE;
3008 }
3009
3010 if ((insn & 0xff000000) == 0x4d000000)
3011 {
3012 /* GD->IE transition.
3013 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3014 insn = 0x5822c000;
3015 }
3016 else
3017 {
3018 /* GD->IE transition.
3019 brasl %r14,__tls_get_addr@plt ->
3020 l %r2,0(%r2,%r12) ; bcr 0,0 */
3021 insn = 0x5822c000;
3022 bfd_put_16 (output_bfd, 0x0700,
3023 contents + rel->r_offset + 4);
3024 }
3025 }
3026 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3027 }
3028 else if (r_type == R_390_TLS_LDCALL)
3029 {
3030 if (!bfd_link_pic (info))
3031 {
3032 unsigned int insn;
3033
3034 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3035 if ((insn & 0xff000fff) != 0x4d000000 &&
3036 (insn & 0xffff0000) != 0xc0e50000 &&
3037 (insn & 0xff000000) != 0x0d000000)
3038 {
3039 invalid_tls_insn (input_bfd, input_section, rel);
3040 return FALSE;
3041 }
3042
3043 if ((insn & 0xff000000) == 0x0d000000)
3044 {
3045 /* LD->LE transition.
3046 basr rx, ry -> nopr r7 */
3047 insn = 0x07070000 | (insn & 0xffff);
3048 }
3049 else if ((insn & 0xff000000) == 0x4d000000)
3050 {
3051 /* LD->LE transition.
3052 bas %r14,0(%rx,%r13) -> bc 0,0 */
3053 insn = 0x47000000;
3054 }
3055 else
3056 {
3057 /* LD->LE transition.
3058 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3059 insn = 0xc0040000;
3060 bfd_put_16 (output_bfd, 0x0000,
3061 contents + rel->r_offset + 4);
3062 }
3063 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3064 }
3065 }
3066 continue;
3067
3068 default:
3069 break;
3070 }
3071
3072 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3073 because such sections are not SEC_ALLOC and thus ld.so will
3074 not process them. */
3075 if (unresolved_reloc
3076 && !((input_section->flags & SEC_DEBUGGING) != 0
3077 && h->def_dynamic)
3078 && _bfd_elf_section_offset (output_bfd, info, input_section,
3079 rel->r_offset) != (bfd_vma) -1)
3080 _bfd_error_handler
3081 /* xgettext:c-format */
3082 (_("%pB(%pA+%#" PRIx64 "): "
3083 "unresolvable %s relocation against symbol `%s'"),
3084 input_bfd,
3085 input_section,
3086 (uint64_t) rel->r_offset,
3087 howto->name,
3088 h->root.root.string);
3089
3090 do_relocation:
3091
3092 /* When applying a 24 bit reloc we need to start one byte
3093 earlier. Otherwise the 32 bit get/put bfd operations might
3094 access a byte after the actual section. */
3095 if (r_type == R_390_PC24DBL
3096 || r_type == R_390_PLT24DBL)
3097 rel->r_offset--;
3098
3099 if (r_type == R_390_20
3100 || r_type == R_390_GOT20
3101 || r_type == R_390_GOTPLT20
3102 || r_type == R_390_TLS_GOTIE20)
3103 {
3104 relocation += rel->r_addend;
3105 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3106 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3107 contents, rel->r_offset,
3108 relocation, 0);
3109 }
3110 else
3111 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3112 contents, rel->r_offset,
3113 relocation, rel->r_addend);
3114
3115 if (r != bfd_reloc_ok)
3116 {
3117 const char *name;
3118
3119 if (h != NULL)
3120 name = h->root.root.string;
3121 else
3122 {
3123 name = bfd_elf_string_from_elf_section (input_bfd,
3124 symtab_hdr->sh_link,
3125 sym->st_name);
3126 if (name == NULL)
3127 return FALSE;
3128 if (*name == '\0')
3129 name = bfd_section_name (sec);
3130 }
3131
3132 if (r == bfd_reloc_overflow)
3133 (*info->callbacks->reloc_overflow)
3134 (info, (h ? &h->root : NULL), name, howto->name,
3135 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3136 else
3137 {
3138 _bfd_error_handler
3139 /* xgettext:c-format */
3140 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3141 input_bfd, input_section,
3142 (uint64_t) rel->r_offset, name, (int) r);
3143 return FALSE;
3144 }
3145 }
3146 }
3147
3148 return TRUE;
3149 }
3150
3151 /* Generate the PLT slots together with the dynamic relocations needed
3152 for IFUNC symbols. */
3153
3154 static void
3155 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3156 struct bfd_link_info *info,
3157 struct elf_link_hash_entry *h,
3158 struct elf_s390_link_hash_table *htab,
3159 bfd_vma iplt_offset,
3160 bfd_vma resolver_address)
3161 {
3162 bfd_vma iplt_index;
3163 bfd_vma got_offset;
3164 bfd_vma igotiplt_offset;
3165 Elf_Internal_Rela rela;
3166 bfd_byte *loc;
3167 asection *plt, *gotplt, *relplt;
3168 bfd_vma relative_offset;
3169
3170 if (htab->elf.iplt == NULL
3171 || htab->elf.igotplt == NULL
3172 || htab->elf.irelplt == NULL)
3173 abort ();
3174
3175 gotplt = htab->elf.igotplt;
3176 relplt = htab->elf.irelplt;
3177
3178 /* Index of the PLT slot within iplt section. */
3179 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3180 plt = htab->elf.iplt;
3181 /* Offset into the igot.plt section. */
3182 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3183 /* Offset into the got section. */
3184 got_offset = igotiplt_offset + gotplt->output_offset;
3185
3186 /* S390 uses halfwords for relative branch calc! */
3187 relative_offset = - (plt->output_offset +
3188 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3189 /* If offset is > 32768, branch to a previous branch
3190 390 can only handle +-64 K jumps. */
3191 if ( -32768 > (int) relative_offset )
3192 relative_offset
3193 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3194
3195 /* Fill in the entry in the procedure linkage table. */
3196 if (!bfd_link_pic (info))
3197 {
3198 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3199 PLT_ENTRY_SIZE);
3200
3201 /* Adjust jump to the first plt entry. */
3202 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3203 plt->contents + iplt_offset + 20);
3204
3205 /* Push the GOT offset field. */
3206 bfd_put_32 (output_bfd,
3207 (gotplt->output_section->vma
3208 + got_offset),
3209 plt->contents + iplt_offset + 24);
3210 }
3211 else if (got_offset < 4096)
3212 {
3213 /* The GOT offset is small enough to be used directly as
3214 displacement. */
3215 memcpy (plt->contents + iplt_offset,
3216 elf_s390_plt_pic12_entry,
3217 PLT_ENTRY_SIZE);
3218
3219 /* Put in the GOT offset as displacement value. The 0xc000
3220 value comes from the first word of the plt entry. Look
3221 at the elf_s390_plt_pic16_entry content. */
3222 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3223 plt->contents + iplt_offset + 2);
3224
3225 /* Adjust the jump to the first plt entry. */
3226 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3227 plt->contents + iplt_offset + 20);
3228 }
3229 else if (got_offset < 32768)
3230 {
3231 /* The GOT offset is too big for a displacement but small
3232 enough to be a signed 16 bit immediate value as it can be
3233 used in an lhi instruction. */
3234 memcpy (plt->contents + iplt_offset,
3235 elf_s390_plt_pic16_entry,
3236 PLT_ENTRY_SIZE);
3237
3238 /* Put in the GOT offset for the lhi instruction. */
3239 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3240 plt->contents + iplt_offset + 2);
3241
3242 /* Adjust the jump to the first plt entry. */
3243 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3244 plt->contents + iplt_offset + 20);
3245 }
3246 else
3247 {
3248 memcpy (plt->contents + iplt_offset,
3249 elf_s390_plt_pic_entry,
3250 PLT_ENTRY_SIZE);
3251
3252 /* Adjust the jump to the first plt entry. */
3253 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3254 plt->contents + iplt_offset + 20);
3255
3256 /* Push the GOT offset field. */
3257 bfd_put_32 (output_bfd, got_offset,
3258 plt->contents + iplt_offset + 24);
3259 }
3260 /* Insert offset into reloc. table here. */
3261 bfd_put_32 (output_bfd, relplt->output_offset +
3262 iplt_index * RELA_ENTRY_SIZE,
3263 plt->contents + iplt_offset + 28);
3264
3265 /* Fill in the entry in the global offset table.
3266 Points to instruction after GOT offset. */
3267 bfd_put_32 (output_bfd,
3268 (plt->output_section->vma
3269 + plt->output_offset
3270 + iplt_offset
3271 + 12),
3272 gotplt->contents + igotiplt_offset);
3273
3274 /* Fill in the entry in the .rela.plt section. */
3275 rela.r_offset = gotplt->output_section->vma + got_offset;
3276
3277 if (!h
3278 || h->dynindx == -1
3279 || ((bfd_link_executable (info)
3280 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3281 && h->def_regular))
3282 {
3283 /* The symbol can be locally resolved. */
3284 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3285 rela.r_addend = resolver_address;
3286 }
3287 else
3288 {
3289 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3290 rela.r_addend = 0;
3291 }
3292
3293 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3294 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3295 }
3296
3297 /* Finish up dynamic symbol handling. We set the contents of various
3298 dynamic sections here. */
3299
3300 static bfd_boolean
3301 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3302 struct bfd_link_info *info,
3303 struct elf_link_hash_entry *h,
3304 Elf_Internal_Sym *sym)
3305 {
3306 struct elf_s390_link_hash_table *htab;
3307 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3308
3309 htab = elf_s390_hash_table (info);
3310
3311 if (h->plt.offset != (bfd_vma) -1)
3312 {
3313 bfd_vma plt_index;
3314 bfd_vma got_offset;
3315 Elf_Internal_Rela rela;
3316 bfd_byte *loc;
3317 bfd_vma relative_offset;
3318
3319 /* This symbol has an entry in the procedure linkage table. Set
3320 it up. */
3321 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3322 {
3323 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3324 htab, h->plt.offset,
3325 eh->ifunc_resolver_address +
3326 eh->ifunc_resolver_section->output_offset +
3327 eh->ifunc_resolver_section->output_section->vma);
3328 /* Do not return yet. Handling of explicit GOT slots of
3329 IFUNC symbols is below. */
3330 }
3331 else
3332 {
3333 if (h->dynindx == -1
3334 || htab->elf.splt == NULL
3335 || htab->elf.sgotplt == NULL
3336 || htab->elf.srelplt == NULL)
3337 abort ();
3338
3339 /* Calc. index no.
3340 Current offset - size first entry / entry size. */
3341 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3342
3343 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3344 addr & GOT addr. */
3345 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3346
3347 /* S390 uses halfwords for relative branch calc! */
3348 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3349 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3350 /* If offset is > 32768, branch to a previous branch
3351 390 can only handle +-64 K jumps. */
3352 if ( -32768 > (int) relative_offset )
3353 relative_offset
3354 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3355
3356 /* Fill in the entry in the procedure linkage table. */
3357 if (!bfd_link_pic (info))
3358 {
3359 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3360 PLT_ENTRY_SIZE);
3361
3362 /* Adjust jump to the first plt entry. */
3363 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3364 htab->elf.splt->contents + h->plt.offset + 20);
3365
3366 /* Push the GOT offset field. */
3367 bfd_put_32 (output_bfd,
3368 (htab->elf.sgotplt->output_section->vma
3369 + htab->elf.sgotplt->output_offset
3370 + got_offset),
3371 htab->elf.splt->contents + h->plt.offset + 24);
3372 }
3373 else if (got_offset < 4096)
3374 {
3375 /* The GOT offset is small enough to be used directly as
3376 displacement. */
3377 memcpy (htab->elf.splt->contents + h->plt.offset,
3378 elf_s390_plt_pic12_entry,
3379 PLT_ENTRY_SIZE);
3380
3381 /* Put in the GOT offset as displacement value. The 0xc000
3382 value comes from the first word of the plt entry. Look
3383 at the elf_s390_plt_pic12_entry content. */
3384 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3385 htab->elf.splt->contents + h->plt.offset + 2);
3386
3387 /* Adjust the jump to the first plt entry. */
3388 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3389 htab->elf.splt->contents + h->plt.offset + 20);
3390 }
3391 else if (got_offset < 32768)
3392 {
3393 /* The GOT offset is too big for a displacement but small
3394 enough to be a signed 16 bit immediate value as it can be
3395 used in an lhi instruction. */
3396 memcpy (htab->elf.splt->contents + h->plt.offset,
3397 elf_s390_plt_pic16_entry,
3398 PLT_ENTRY_SIZE);
3399
3400 /* Put in the GOT offset for the lhi instruction. */
3401 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3402 htab->elf.splt->contents + h->plt.offset + 2);
3403
3404 /* Adjust the jump to the first plt entry. */
3405 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3406 htab->elf.splt->contents + h->plt.offset + 20);
3407 }
3408 else
3409 {
3410 memcpy (htab->elf.splt->contents + h->plt.offset,
3411 elf_s390_plt_pic_entry,
3412 PLT_ENTRY_SIZE);
3413
3414 /* Adjust the jump to the first plt entry. */
3415 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3416 htab->elf.splt->contents + h->plt.offset + 20);
3417
3418 /* Push the GOT offset field. */
3419 bfd_put_32 (output_bfd, got_offset,
3420 htab->elf.splt->contents + h->plt.offset + 24);
3421 }
3422 /* Insert offset into reloc. table here. */
3423 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3424 htab->elf.splt->contents + h->plt.offset + 28);
3425
3426 /* Fill in the entry in the global offset table.
3427 Points to instruction after GOT offset. */
3428 bfd_put_32 (output_bfd,
3429 (htab->elf.splt->output_section->vma
3430 + htab->elf.splt->output_offset
3431 + h->plt.offset
3432 + 12),
3433 htab->elf.sgotplt->contents + got_offset);
3434
3435 /* Fill in the entry in the .rela.plt section. */
3436 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3437 + htab->elf.sgotplt->output_offset
3438 + got_offset);
3439 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3440 rela.r_addend = 0;
3441 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3442 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3443
3444 if (!h->def_regular)
3445 {
3446 /* Mark the symbol as undefined, rather than as defined in
3447 the .plt section. Leave the value alone. This is a clue
3448 for the dynamic linker, to make function pointer
3449 comparisons work between an application and shared
3450 library. */
3451 sym->st_shndx = SHN_UNDEF;
3452 }
3453 }
3454 }
3455
3456 if (h->got.offset != (bfd_vma) -1
3457 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3458 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3459 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3460 {
3461 Elf_Internal_Rela rela;
3462 bfd_byte *loc;
3463
3464 /* This symbol has an entry in the global offset table. Set it
3465 up. */
3466
3467 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3468 abort ();
3469
3470 rela.r_offset = (htab->elf.sgot->output_section->vma
3471 + htab->elf.sgot->output_offset
3472 + (h->got.offset &~ (bfd_vma) 1));
3473
3474 /* If this is a static link, or it is a -Bsymbolic link and the
3475 symbol is defined locally or was forced to be local because
3476 of a version file, we just want to emit a RELATIVE reloc.
3477 The entry in the global offset table will already have been
3478 initialized in the relocate_section function. */
3479 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3480 {
3481 if (bfd_link_pic (info))
3482 {
3483 /* An explicit GOT slot usage needs GLOB_DAT. If the
3484 symbol references local the implicit got.iplt slot
3485 will be used and the IRELATIVE reloc has been created
3486 above. */
3487 goto do_glob_dat;
3488 }
3489 else
3490 {
3491 /* For non-shared objects explicit GOT slots must be
3492 filled with the PLT slot address for pointer
3493 equality reasons. */
3494 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3495 + htab->elf.iplt->output_offset
3496 + h->plt.offset),
3497 htab->elf.sgot->contents + h->got.offset);
3498 return TRUE;
3499 }
3500 }
3501 else if (bfd_link_pic (info)
3502 && SYMBOL_REFERENCES_LOCAL (info, h))
3503 {
3504 /* If this is a static link, or it is a -Bsymbolic link and
3505 the symbol is defined locally or was forced to be local
3506 because of a version file, we just want to emit a
3507 RELATIVE reloc. The entry in the global offset table
3508 will already have been initialized in the
3509 relocate_section function. */
3510 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3511 return FALSE;
3512 BFD_ASSERT((h->got.offset & 1) != 0);
3513 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3514 rela.r_addend = (h->root.u.def.value
3515 + h->root.u.def.section->output_section->vma
3516 + h->root.u.def.section->output_offset);
3517 }
3518 else
3519 {
3520 BFD_ASSERT((h->got.offset & 1) == 0);
3521 do_glob_dat:
3522 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3523 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3524 rela.r_addend = 0;
3525 }
3526
3527 loc = htab->elf.srelgot->contents;
3528 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3529 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3530 }
3531
3532 if (h->needs_copy)
3533 {
3534 Elf_Internal_Rela rela;
3535 asection *s;
3536 bfd_byte *loc;
3537
3538 /* This symbols needs a copy reloc. Set it up. */
3539
3540 if (h->dynindx == -1
3541 || (h->root.type != bfd_link_hash_defined
3542 && h->root.type != bfd_link_hash_defweak)
3543 || htab->elf.srelbss == NULL
3544 || htab->elf.sreldynrelro == NULL)
3545 abort ();
3546
3547 rela.r_offset = (h->root.u.def.value
3548 + h->root.u.def.section->output_section->vma
3549 + h->root.u.def.section->output_offset);
3550 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3551 rela.r_addend = 0;
3552 if (h->root.u.def.section == htab->elf.sdynrelro)
3553 s = htab->elf.sreldynrelro;
3554 else
3555 s = htab->elf.srelbss;
3556 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3557 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3558 }
3559
3560 /* Mark some specially defined symbols as absolute. */
3561 if (h == htab->elf.hdynamic
3562 || h == htab->elf.hgot
3563 || h == htab->elf.hplt)
3564 sym->st_shndx = SHN_ABS;
3565
3566 return TRUE;
3567 }
3568
3569 /* Used to decide how to sort relocs in an optimal manner for the
3570 dynamic linker, before writing them out. */
3571
3572 static enum elf_reloc_type_class
3573 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3574 const asection *rel_sec ATTRIBUTE_UNUSED,
3575 const Elf_Internal_Rela *rela)
3576 {
3577 bfd *abfd = info->output_bfd;
3578 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3579 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3580 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3581 Elf_Internal_Sym sym;
3582
3583 if (htab->elf.dynsym == NULL
3584 || !bed->s->swap_symbol_in (abfd,
3585 (htab->elf.dynsym->contents
3586 + r_symndx * bed->s->sizeof_sym),
3587 0, &sym))
3588 abort ();
3589
3590 /* Check relocation against STT_GNU_IFUNC symbol. */
3591 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3592 return reloc_class_ifunc;
3593
3594 switch ((int) ELF32_R_TYPE (rela->r_info))
3595 {
3596 case R_390_RELATIVE:
3597 return reloc_class_relative;
3598 case R_390_JMP_SLOT:
3599 return reloc_class_plt;
3600 case R_390_COPY:
3601 return reloc_class_copy;
3602 default:
3603 return reloc_class_normal;
3604 }
3605 }
3606
3607 /* Finish up the dynamic sections. */
3608
3609 static bfd_boolean
3610 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3611 struct bfd_link_info *info)
3612 {
3613 struct elf_s390_link_hash_table *htab;
3614 bfd *dynobj;
3615 asection *sdyn;
3616 bfd *ibfd;
3617 unsigned int i;
3618
3619 htab = elf_s390_hash_table (info);
3620 dynobj = htab->elf.dynobj;
3621 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3622
3623 if (htab->elf.dynamic_sections_created)
3624 {
3625 Elf32_External_Dyn *dyncon, *dynconend;
3626
3627 if (sdyn == NULL || htab->elf.sgot == NULL)
3628 abort ();
3629
3630 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3631 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3632 for (; dyncon < dynconend; dyncon++)
3633 {
3634 Elf_Internal_Dyn dyn;
3635 asection *s;
3636
3637 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3638
3639 switch (dyn.d_tag)
3640 {
3641 default:
3642 continue;
3643
3644 case DT_PLTGOT:
3645 s = htab->elf.sgotplt;
3646 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3647 break;
3648
3649 case DT_JMPREL:
3650 s = htab->elf.srelplt;
3651 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3652 break;
3653
3654 case DT_PLTRELSZ:
3655 dyn.d_un.d_val = htab->elf.srelplt->size;
3656 if (htab->elf.irelplt)
3657 dyn.d_un.d_val += htab->elf.irelplt->size;
3658 break;
3659 }
3660
3661 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3662 }
3663
3664 /* Fill in the special first entry in the procedure linkage table. */
3665 if (htab->elf.splt && htab->elf.splt->size > 0)
3666 {
3667 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3668 if (bfd_link_pic (info))
3669 {
3670 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3671 PLT_FIRST_ENTRY_SIZE);
3672 }
3673 else
3674 {
3675 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3676 PLT_FIRST_ENTRY_SIZE);
3677 bfd_put_32 (output_bfd,
3678 htab->elf.sgotplt->output_section->vma
3679 + htab->elf.sgotplt->output_offset,
3680 htab->elf.splt->contents + 24);
3681 }
3682 elf_section_data (htab->elf.splt->output_section)
3683 ->this_hdr.sh_entsize = 4;
3684 }
3685
3686 }
3687
3688 if (htab->elf.sgotplt)
3689 {
3690 /* Fill in the first three entries in the global offset table. */
3691 if (htab->elf.sgotplt->size > 0)
3692 {
3693 bfd_put_32 (output_bfd,
3694 (sdyn == NULL ? (bfd_vma) 0
3695 : sdyn->output_section->vma + sdyn->output_offset),
3696 htab->elf.sgotplt->contents);
3697 /* One entry for shared object struct ptr. */
3698 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3699 /* One entry for _dl_runtime_resolve. */
3700 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3701 }
3702
3703 elf_section_data (htab->elf.sgotplt->output_section)
3704 ->this_hdr.sh_entsize = 4;
3705 }
3706 /* Finish dynamic symbol for local IFUNC symbols. */
3707 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3708 {
3709 struct plt_entry *local_plt;
3710 Elf_Internal_Sym *isym;
3711 Elf_Internal_Shdr *symtab_hdr;
3712
3713 symtab_hdr = &elf_symtab_hdr (ibfd);
3714
3715 if (!is_s390_elf (ibfd))
3716 continue;
3717
3718 local_plt = elf_s390_local_plt (ibfd);
3719 if (local_plt != NULL)
3720 for (i = 0; i < symtab_hdr->sh_info; i++)
3721 {
3722 if (local_plt[i].plt.offset != (bfd_vma) -1)
3723 {
3724 asection *sec = local_plt[i].sec;
3725 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3726 if (isym == NULL)
3727 return FALSE;
3728
3729 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3730 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3731 local_plt[i].plt.offset,
3732 isym->st_value
3733 + sec->output_section->vma
3734 + sec->output_offset);
3735
3736 }
3737 }
3738 }
3739 return TRUE;
3740 }
3741 \f
3742 /* Support for core dump NOTE sections. */
3743
3744 static bfd_boolean
3745 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3746 {
3747 int offset;
3748 unsigned int size;
3749
3750 switch (note->descsz)
3751 {
3752 default:
3753 return FALSE;
3754
3755 case 224: /* S/390 Linux. */
3756 /* pr_cursig */
3757 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3758
3759 /* pr_pid */
3760 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3761
3762 /* pr_reg */
3763 offset = 72;
3764 size = 144;
3765 break;
3766 }
3767
3768 /* Make a ".reg/999" section. */
3769 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3770 size, note->descpos + offset);
3771 }
3772
3773 static bfd_boolean
3774 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3775 {
3776 switch (note->descsz)
3777 {
3778 default:
3779 return FALSE;
3780
3781 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3782 elf_tdata (abfd)->core->pid
3783 = bfd_get_32 (abfd, note->descdata + 12);
3784 elf_tdata (abfd)->core->program
3785 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3786 elf_tdata (abfd)->core->command
3787 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3788 break;
3789 }
3790
3791 /* Note that for some reason, a spurious space is tacked
3792 onto the end of the args in some (at least one anyway)
3793 implementations, so strip it off if it exists. */
3794
3795 {
3796 char *command = elf_tdata (abfd)->core->command;
3797 int n = strlen (command);
3798
3799 if (0 < n && command[n - 1] == ' ')
3800 command[n - 1] = '\0';
3801 }
3802
3803 return TRUE;
3804 }
3805
3806 static char *
3807 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3808 int note_type, ...)
3809 {
3810 va_list ap;
3811
3812 switch (note_type)
3813 {
3814 default:
3815 return NULL;
3816
3817 case NT_PRPSINFO:
3818 {
3819 char data[124] ATTRIBUTE_NONSTRING = { 0 };
3820 const char *fname, *psargs;
3821
3822 va_start (ap, note_type);
3823 fname = va_arg (ap, const char *);
3824 psargs = va_arg (ap, const char *);
3825 va_end (ap);
3826
3827 strncpy (data + 28, fname, 16);
3828 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3829 DIAGNOSTIC_PUSH;
3830 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3831 -Wstringop-truncation:
3832 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3833 */
3834 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3835 #endif
3836 strncpy (data + 44, psargs, 80);
3837 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3838 DIAGNOSTIC_POP;
3839 #endif
3840 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3841 &data, sizeof (data));
3842 }
3843
3844 case NT_PRSTATUS:
3845 {
3846 char data[224] = { 0 };
3847 long pid;
3848 int cursig;
3849 const void *gregs;
3850
3851 va_start (ap, note_type);
3852 pid = va_arg (ap, long);
3853 cursig = va_arg (ap, int);
3854 gregs = va_arg (ap, const void *);
3855 va_end (ap);
3856
3857 bfd_put_16 (abfd, cursig, data + 12);
3858 bfd_put_32 (abfd, pid, data + 24);
3859 memcpy (data + 72, gregs, 144);
3860 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3861 &data, sizeof (data));
3862 }
3863 }
3864 /* NOTREACHED */
3865 }
3866 \f
3867 /* Return address for Ith PLT stub in section PLT, for relocation REL
3868 or (bfd_vma) -1 if it should not be included. */
3869
3870 static bfd_vma
3871 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3872 const arelent *rel ATTRIBUTE_UNUSED)
3873 {
3874 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3875 }
3876
3877 /* Merge backend specific data from an object file to the output
3878 object file when linking. */
3879
3880 static bfd_boolean
3881 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3882 {
3883 bfd *obfd = info->output_bfd;
3884
3885 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3886 return TRUE;
3887
3888 if (!elf_s390_merge_obj_attributes (ibfd, info))
3889 return FALSE;
3890
3891 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3892 return TRUE;
3893 }
3894
3895
3896 #define TARGET_BIG_SYM s390_elf32_vec
3897 #define TARGET_BIG_NAME "elf32-s390"
3898 #define ELF_ARCH bfd_arch_s390
3899 #define ELF_TARGET_ID S390_ELF_DATA
3900 #define ELF_MACHINE_CODE EM_S390
3901 #define ELF_MACHINE_ALT1 EM_S390_OLD
3902 #define ELF_MAXPAGESIZE 0x1000
3903
3904 #define elf_backend_can_gc_sections 1
3905 #define elf_backend_can_refcount 1
3906 #define elf_backend_want_got_plt 1
3907 #define elf_backend_plt_readonly 1
3908 #define elf_backend_want_plt_sym 0
3909 #define elf_backend_got_header_size 12
3910 #define elf_backend_want_dynrelro 1
3911 #define elf_backend_rela_normal 1
3912
3913 #define elf_info_to_howto elf_s390_info_to_howto
3914
3915 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3916 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3917 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3918 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3919
3920 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
3921
3922 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3923 #define elf_backend_check_relocs elf_s390_check_relocs
3924 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3925 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3926 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3927 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3928 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3929 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3930 #define elf_backend_relocate_section elf_s390_relocate_section
3931 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3932 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3933 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3934 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
3935 #define elf_backend_write_core_note elf_s390_write_core_note
3936 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3937 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3938
3939 #define bfd_elf32_mkobject elf_s390_mkobject
3940 #define elf_backend_object_p elf_s390_object_p
3941
3942 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
3943
3944 #include "elf32-target.h"
GDB Binutils - Deliverables
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