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[thirdparty/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include <stdarg.h>
29
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
36
37 /* The relocation "howto" table. */
38
39 static reloc_howto_type elf_howto_table[] =
40 {
41 HOWTO (R_390_NONE, /* type */
42 0, /* rightshift */
43 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
44 0, /* bitsize */
45 FALSE, /* pc_relative */
46 0, /* bitpos */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
51 0, /* src_mask */
52 0, /* dst_mask */
53 FALSE), /* pcrel_offset */
54
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
172 };
173
174 /* GNU extension to record C++ vtable hierarchy. */
175 static reloc_howto_type elf32_s390_vtinherit_howto =
176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
177 static reloc_howto_type elf32_s390_vtentry_howto =
178 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
179
180 static reloc_howto_type *
181 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182 bfd_reloc_code_real_type code)
183 {
184 switch (code)
185 {
186 case BFD_RELOC_NONE:
187 return &elf_howto_table[(int) R_390_NONE];
188 case BFD_RELOC_8:
189 return &elf_howto_table[(int) R_390_8];
190 case BFD_RELOC_390_12:
191 return &elf_howto_table[(int) R_390_12];
192 case BFD_RELOC_16:
193 return &elf_howto_table[(int) R_390_16];
194 case BFD_RELOC_32:
195 return &elf_howto_table[(int) R_390_32];
196 case BFD_RELOC_CTOR:
197 return &elf_howto_table[(int) R_390_32];
198 case BFD_RELOC_32_PCREL:
199 return &elf_howto_table[(int) R_390_PC32];
200 case BFD_RELOC_390_GOT12:
201 return &elf_howto_table[(int) R_390_GOT12];
202 case BFD_RELOC_32_GOT_PCREL:
203 return &elf_howto_table[(int) R_390_GOT32];
204 case BFD_RELOC_390_PLT32:
205 return &elf_howto_table[(int) R_390_PLT32];
206 case BFD_RELOC_390_COPY:
207 return &elf_howto_table[(int) R_390_COPY];
208 case BFD_RELOC_390_GLOB_DAT:
209 return &elf_howto_table[(int) R_390_GLOB_DAT];
210 case BFD_RELOC_390_JMP_SLOT:
211 return &elf_howto_table[(int) R_390_JMP_SLOT];
212 case BFD_RELOC_390_RELATIVE:
213 return &elf_howto_table[(int) R_390_RELATIVE];
214 case BFD_RELOC_32_GOTOFF:
215 return &elf_howto_table[(int) R_390_GOTOFF32];
216 case BFD_RELOC_390_GOTPC:
217 return &elf_howto_table[(int) R_390_GOTPC];
218 case BFD_RELOC_390_GOT16:
219 return &elf_howto_table[(int) R_390_GOT16];
220 case BFD_RELOC_16_PCREL:
221 return &elf_howto_table[(int) R_390_PC16];
222 case BFD_RELOC_390_PC12DBL:
223 return &elf_howto_table[(int) R_390_PC12DBL];
224 case BFD_RELOC_390_PLT12DBL:
225 return &elf_howto_table[(int) R_390_PLT12DBL];
226 case BFD_RELOC_390_PC16DBL:
227 return &elf_howto_table[(int) R_390_PC16DBL];
228 case BFD_RELOC_390_PLT16DBL:
229 return &elf_howto_table[(int) R_390_PLT16DBL];
230 case BFD_RELOC_390_PC24DBL:
231 return &elf_howto_table[(int) R_390_PC24DBL];
232 case BFD_RELOC_390_PLT24DBL:
233 return &elf_howto_table[(int) R_390_PLT24DBL];
234 case BFD_RELOC_390_PC32DBL:
235 return &elf_howto_table[(int) R_390_PC32DBL];
236 case BFD_RELOC_390_PLT32DBL:
237 return &elf_howto_table[(int) R_390_PLT32DBL];
238 case BFD_RELOC_390_GOTPCDBL:
239 return &elf_howto_table[(int) R_390_GOTPCDBL];
240 case BFD_RELOC_390_GOTENT:
241 return &elf_howto_table[(int) R_390_GOTENT];
242 case BFD_RELOC_16_GOTOFF:
243 return &elf_howto_table[(int) R_390_GOTOFF16];
244 case BFD_RELOC_390_GOTPLT12:
245 return &elf_howto_table[(int) R_390_GOTPLT12];
246 case BFD_RELOC_390_GOTPLT16:
247 return &elf_howto_table[(int) R_390_GOTPLT16];
248 case BFD_RELOC_390_GOTPLT32:
249 return &elf_howto_table[(int) R_390_GOTPLT32];
250 case BFD_RELOC_390_GOTPLTENT:
251 return &elf_howto_table[(int) R_390_GOTPLTENT];
252 case BFD_RELOC_390_PLTOFF16:
253 return &elf_howto_table[(int) R_390_PLTOFF16];
254 case BFD_RELOC_390_PLTOFF32:
255 return &elf_howto_table[(int) R_390_PLTOFF32];
256 case BFD_RELOC_390_TLS_LOAD:
257 return &elf_howto_table[(int) R_390_TLS_LOAD];
258 case BFD_RELOC_390_TLS_GDCALL:
259 return &elf_howto_table[(int) R_390_TLS_GDCALL];
260 case BFD_RELOC_390_TLS_LDCALL:
261 return &elf_howto_table[(int) R_390_TLS_LDCALL];
262 case BFD_RELOC_390_TLS_GD32:
263 return &elf_howto_table[(int) R_390_TLS_GD32];
264 case BFD_RELOC_390_TLS_GOTIE12:
265 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266 case BFD_RELOC_390_TLS_GOTIE32:
267 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268 case BFD_RELOC_390_TLS_LDM32:
269 return &elf_howto_table[(int) R_390_TLS_LDM32];
270 case BFD_RELOC_390_TLS_IE32:
271 return &elf_howto_table[(int) R_390_TLS_IE32];
272 case BFD_RELOC_390_TLS_IEENT:
273 return &elf_howto_table[(int) R_390_TLS_IEENT];
274 case BFD_RELOC_390_TLS_LE32:
275 return &elf_howto_table[(int) R_390_TLS_LE32];
276 case BFD_RELOC_390_TLS_LDO32:
277 return &elf_howto_table[(int) R_390_TLS_LDO32];
278 case BFD_RELOC_390_TLS_DTPMOD:
279 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280 case BFD_RELOC_390_TLS_DTPOFF:
281 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282 case BFD_RELOC_390_TLS_TPOFF:
283 return &elf_howto_table[(int) R_390_TLS_TPOFF];
284 case BFD_RELOC_390_20:
285 return &elf_howto_table[(int) R_390_20];
286 case BFD_RELOC_390_GOT20:
287 return &elf_howto_table[(int) R_390_GOT20];
288 case BFD_RELOC_390_GOTPLT20:
289 return &elf_howto_table[(int) R_390_GOTPLT20];
290 case BFD_RELOC_390_TLS_GOTIE20:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292 case BFD_RELOC_390_IRELATIVE:
293 return &elf_howto_table[(int) R_390_IRELATIVE];
294 case BFD_RELOC_VTABLE_INHERIT:
295 return &elf32_s390_vtinherit_howto;
296 case BFD_RELOC_VTABLE_ENTRY:
297 return &elf32_s390_vtentry_howto;
298 default:
299 break;
300 }
301 return 0;
302 }
303
304 static reloc_howto_type *
305 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
306 const char *r_name)
307 {
308 unsigned int i;
309
310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311 if (elf_howto_table[i].name != NULL
312 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313 return &elf_howto_table[i];
314
315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316 return &elf32_s390_vtinherit_howto;
317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318 return &elf32_s390_vtentry_howto;
319
320 return NULL;
321 }
322
323 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
324 and elf32-s390.c has its own copy. */
325
326 static void
327 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
328 arelent *cache_ptr,
329 Elf_Internal_Rela *dst)
330 {
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
332 switch (r_type)
333 {
334 case R_390_GNU_VTINHERIT:
335 cache_ptr->howto = &elf32_s390_vtinherit_howto;
336 break;
337
338 case R_390_GNU_VTENTRY:
339 cache_ptr->howto = &elf32_s390_vtentry_howto;
340 break;
341
342 default:
343 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
344 {
345 /* xgettext:c-format */
346 _bfd_error_handler (_("%B: invalid relocation type %d"),
347 abfd, (int) r_type);
348 r_type = R_390_NONE;
349 }
350 cache_ptr->howto = &elf_howto_table[r_type];
351 }
352 }
353
354 /* A relocation function which doesn't do anything. */
355 static bfd_reloc_status_type
356 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
357 arelent *reloc_entry,
358 asymbol *symbol ATTRIBUTE_UNUSED,
359 void * data ATTRIBUTE_UNUSED,
360 asection *input_section,
361 bfd *output_bfd,
362 char **error_message ATTRIBUTE_UNUSED)
363 {
364 if (output_bfd)
365 reloc_entry->address += input_section->output_offset;
366 return bfd_reloc_ok;
367 }
368
369 /* Handle the large displacement relocs. */
370 static bfd_reloc_status_type
371 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
372 arelent *reloc_entry,
373 asymbol *symbol,
374 void * data ATTRIBUTE_UNUSED,
375 asection *input_section,
376 bfd *output_bfd,
377 char **error_message ATTRIBUTE_UNUSED)
378 {
379 reloc_howto_type *howto = reloc_entry->howto;
380 bfd_vma relocation;
381 bfd_vma insn;
382
383 if (output_bfd != (bfd *) NULL
384 && (symbol->flags & BSF_SECTION_SYM) == 0
385 && (! howto->partial_inplace
386 || reloc_entry->addend == 0))
387 {
388 reloc_entry->address += input_section->output_offset;
389 return bfd_reloc_ok;
390 }
391
392 if (output_bfd != NULL)
393 return bfd_reloc_continue;
394
395 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
396 return bfd_reloc_outofrange;
397
398 relocation = (symbol->value
399 + symbol->section->output_section->vma
400 + symbol->section->output_offset);
401 relocation += reloc_entry->addend;
402 if (howto->pc_relative)
403 {
404 relocation -= (input_section->output_section->vma
405 + input_section->output_offset);
406 relocation -= reloc_entry->address;
407 }
408
409 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
410 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
411 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
412
413 if ((bfd_signed_vma) relocation < - 0x80000
414 || (bfd_signed_vma) relocation > 0x7ffff)
415 return bfd_reloc_overflow;
416 else
417 return bfd_reloc_ok;
418 }
419
420 static bfd_boolean
421 elf_s390_is_local_label_name (bfd *abfd, const char *name)
422 {
423 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
424 return TRUE;
425
426 return _bfd_elf_is_local_label_name (abfd, name);
427 }
428
429 /* Functions for the 390 ELF linker. */
430
431 /* The name of the dynamic interpreter. This is put in the .interp
432 section. */
433
434 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
435
436 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
437 copying dynamic variables from a shared lib into an app's dynbss
438 section, and instead use a dynamic relocation to point into the
439 shared lib. */
440 #define ELIMINATE_COPY_RELOCS 1
441
442 /* The size in bytes of the first entry in the procedure linkage table. */
443 #define PLT_FIRST_ENTRY_SIZE 32
444 /* The size in bytes of an entry in the procedure linkage table. */
445 #define PLT_ENTRY_SIZE 32
446
447 #define GOT_ENTRY_SIZE 4
448
449 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
450
451 /* The first three entries in a procedure linkage table are reserved,
452 and the initial contents are unimportant (we zero them out).
453 Subsequent entries look like this. See the SVR4 ABI 386
454 supplement to see how this works. */
455
456 /* For the s390, simple addr offset can only be 0 - 4096.
457 To use the full 2 GB address space, several instructions
458 are needed to load an address in a register and execute
459 a branch( or just saving the address)
460
461 Furthermore, only r 0 and 1 are free to use!!! */
462
463 /* The first 3 words in the GOT are then reserved.
464 Word 0 is the address of the dynamic table.
465 Word 1 is a pointer to a structure describing the object
466 Word 2 is used to point to the loader entry address.
467
468 The code for position independent PLT entries looks like this:
469
470 r12 holds addr of the current GOT at entry to the PLT
471
472 The GOT holds the address in the PLT to be executed.
473 The loader then gets:
474 24(15) = Pointer to the structure describing the object.
475 28(15) = Offset into rela.plt
476
477 The loader must then find the module where the function is
478 and insert the address in the GOT.
479
480 Note: 390 can only address +- 64 K relative.
481 We check if offset > 65536, then make a relative branch -64xxx
482 back to a previous defined branch
483
484 PLT1: BASR 1,0 # 2 bytes
485 L 1,22(1) # 4 bytes Load offset in GOT in r 1
486 L 1,(1,12) # 4 bytes Load address from GOT in r1
487 BCR 15,1 # 2 bytes Jump to address
488 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
489 L 1,14(1) # 4 bytes Load offset in symol table in r1
490 BRC 15,-x # 4 bytes Jump to start of PLT
491 .word 0 # 2 bytes filler
492 .long ? # 4 bytes offset in GOT
493 .long ? # 4 bytes offset into rela.plt
494
495 This was the general case. There are two additional, optimizes PLT
496 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
497 First the one for GOT offsets < 4096:
498
499 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
500 BCR 15,1 # 2 bytes Jump to address
501 .word 0,0,0 # 6 bytes filler
502 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
503 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
504 BRC 15,-x # 4 bytes Jump to start of PLT
505 .word 0,0,0 # 6 bytes filler
506 .long ? # 4 bytes offset into rela.plt
507
508 Second the one for GOT offsets < 32768:
509
510 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
511 L 1,(1,12) # 4 bytes Load address from GOT to r1
512 BCR 15,1 # 2 bytes Jump to address
513 .word 0 # 2 bytes filler
514 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
515 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
516 BRC 15,-x # 4 bytes Jump to start of PLT
517 .word 0,0,0 # 6 bytes filler
518 .long ? # 4 bytes offset into rela.plt
519
520 Total = 32 bytes per PLT entry
521
522 The code for static build PLT entries looks like this:
523
524 PLT1: BASR 1,0 # 2 bytes
525 L 1,22(1) # 4 bytes Load address of GOT entry
526 L 1,0(0,1) # 4 bytes Load address from GOT in r1
527 BCR 15,1 # 2 bytes Jump to address
528 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
529 L 1,14(1) # 4 bytes Load offset in symbol table in r1
530 BRC 15,-x # 4 bytes Jump to start of PLT
531 .word 0 # 2 bytes filler
532 .long ? # 4 bytes address of GOT entry
533 .long ? # 4 bytes offset into rela.plt */
534
535 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
536 {
537 0x0d, 0x10, /* basr %r1,%r0 */
538 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
539 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
540 0x07, 0xf1, /* br %r1 */
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
543 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
544 0x00, 0x00, /* padding */
545 0x00, 0x00, 0x00, 0x00, /* GOT offset */
546 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
547 };
548
549 /* Generic PLT pic entry. */
550 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
551 {
552 0x0d, 0x10, /* basr %r1,%r0 */
553 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
554 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
555 0x07, 0xf1, /* br %r1 */
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
558 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
559 0x00, 0x00, /* padding */
560 0x00, 0x00, 0x00, 0x00, /* GOT offset */
561 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
562 };
563
564 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
565 when generating the PLT slot with the GOT offset. */
566 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
567 {
568 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
569 0x07, 0xf1, /* br %r1 */
570 0x00, 0x00, 0x00, 0x00, /* padding */
571 0x00, 0x00,
572 0x0d, 0x10, /* basr %r1,%r0 */
573 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
574 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
575 0x00, 0x00, 0x00, 0x00,
576 0x00, 0x00, 0x00, 0x00
577 };
578
579 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
580 when generating the PLT slot with the GOT offset. */
581 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
582 {
583 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
584 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
585 0x07, 0xf1, /* br %r1 */
586 0x00, 0x00,
587 0x0d, 0x10, /* basr %r1,%r0 */
588 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
589 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
590 0x00, 0x00, 0x00, 0x00,
591 0x00, 0x00, 0x00, 0x00,
592 0x00, 0x00
593 };
594
595 /* The first PLT entry pushes the offset into the rela.plt
596 from R1 onto the stack at 8(15) and the loader object info
597 at 12(15), loads the loader address in R1 and jumps to it. */
598
599 /* The first entry in the PLT for PIC code:
600
601 PLT0:
602 ST 1,28(15) # R1 has offset into rela.plt
603 L 1,4(12) # Get loader ino(object struct address)
604 ST 1,24(15) # Store address
605 L 1,8(12) # Entry address of loader in R1
606 BR 1 # Jump to loader
607
608 The first entry in the PLT for static code:
609
610 PLT0:
611 ST 1,28(15) # R1 has offset into rela.plt
612 BASR 1,0
613 L 1,18(0,1) # Get address of GOT
614 MVC 24(4,15),4(1) # Move loader ino to stack
615 L 1,8(1) # Get address of loader
616 BR 1 # Jump to loader
617 .word 0 # filler
618 .long got # address of GOT */
619
620 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
621 {
622 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
623 0x0d, 0x10, /* basr %r1,%r0 */
624 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
625 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
626 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
627 0x07, 0xf1, /* br %r1 */
628 0x00, 0x00, 0x00, 0x00,
629 0x00, 0x00, 0x00, 0x00,
630 0x00, 0x00
631 };
632
633 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
634 {
635 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
636 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
637 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
638 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
639 0x07, 0xf1, /* br %r1 */
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00, 0x00, 0x00,
642 0x00, 0x00, 0x00, 0x00,
643 0x00, 0x00
644 };
645
646
647 /* s390 ELF linker hash entry. */
648
649 struct elf_s390_link_hash_entry
650 {
651 struct elf_link_hash_entry elf;
652
653 /* Track dynamic relocs copied for this symbol. */
654 struct elf_dyn_relocs *dyn_relocs;
655
656 /* Number of GOTPLT references for a function. */
657 bfd_signed_vma gotplt_refcount;
658
659 #define GOT_UNKNOWN 0
660 #define GOT_NORMAL 1
661 #define GOT_TLS_GD 2
662 #define GOT_TLS_IE 3
663 #define GOT_TLS_IE_NLT 4
664 unsigned char tls_type;
665
666 /* For pointer equality reasons we might need to change the symbol
667 type from STT_GNU_IFUNC to STT_FUNC together with its value and
668 section entry. So after alloc_dynrelocs only these values should
669 be used. In order to check whether a symbol is IFUNC use
670 s390_is_ifunc_symbol_p. */
671 bfd_vma ifunc_resolver_address;
672 asection *ifunc_resolver_section;
673 };
674
675 #define elf_s390_hash_entry(ent) \
676 ((struct elf_s390_link_hash_entry *)(ent))
677
678 /* This structure represents an entry in the local PLT list needed for
679 local IFUNC symbols. */
680 struct plt_entry
681 {
682 /* The section of the local symbol.
683 Set in relocate_section and used in finish_dynamic_sections. */
684 asection *sec;
685
686 union
687 {
688 bfd_signed_vma refcount;
689 bfd_vma offset;
690 } plt;
691 };
692
693 /* NOTE: Keep this structure in sync with
694 the one declared in elf64-s390.c. */
695 struct elf_s390_obj_tdata
696 {
697 struct elf_obj_tdata root;
698
699 /* A local PLT is needed for ifunc symbols. */
700 struct plt_entry *local_plt;
701
702 /* TLS type for each local got entry. */
703 char *local_got_tls_type;
704 };
705
706 #define elf_s390_tdata(abfd) \
707 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
708
709 #define elf_s390_local_plt(abfd) \
710 (elf_s390_tdata (abfd)->local_plt)
711
712 #define elf_s390_local_got_tls_type(abfd) \
713 (elf_s390_tdata (abfd)->local_got_tls_type)
714
715 #define is_s390_elf(bfd) \
716 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
717 && elf_tdata (bfd) != NULL \
718 && elf_object_id (bfd) == S390_ELF_DATA)
719
720 static bfd_boolean
721 elf_s390_mkobject (bfd *abfd)
722 {
723 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
724 S390_ELF_DATA);
725 }
726
727 static bfd_boolean
728 elf_s390_object_p (bfd *abfd)
729 {
730 /* Set the right machine number for an s390 elf32 file. */
731 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
732 }
733
734 /* s390 ELF linker hash table. */
735
736 struct elf_s390_link_hash_table
737 {
738 struct elf_link_hash_table elf;
739
740 /* Short-cuts to get to dynamic linker sections. */
741 asection *irelifunc;
742
743 union
744 {
745 bfd_signed_vma refcount;
746 bfd_vma offset;
747 } tls_ldm_got;
748
749 /* Small local sym cache. */
750 struct sym_cache sym_cache;
751 };
752
753 /* Get the s390 ELF linker hash table from a link_info structure. */
754
755 #define elf_s390_hash_table(p) \
756 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
757 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
758
759 #undef ELF64
760 #include "elf-s390-common.c"
761
762 /* Create an entry in an s390 ELF linker hash table. */
763
764 static struct bfd_hash_entry *
765 link_hash_newfunc (struct bfd_hash_entry *entry,
766 struct bfd_hash_table *table,
767 const char *string)
768 {
769 /* Allocate the structure if it has not already been allocated by a
770 subclass. */
771 if (entry == NULL)
772 {
773 entry = bfd_hash_allocate (table,
774 sizeof (struct elf_s390_link_hash_entry));
775 if (entry == NULL)
776 return entry;
777 }
778
779 /* Call the allocation method of the superclass. */
780 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
781 if (entry != NULL)
782 {
783 struct elf_s390_link_hash_entry *eh;
784
785 eh = (struct elf_s390_link_hash_entry *) entry;
786 eh->dyn_relocs = NULL;
787 eh->gotplt_refcount = 0;
788 eh->tls_type = GOT_UNKNOWN;
789 eh->ifunc_resolver_address = 0;
790 eh->ifunc_resolver_section = NULL;
791 }
792
793 return entry;
794 }
795
796 /* Create an s390 ELF linker hash table. */
797
798 static struct bfd_link_hash_table *
799 elf_s390_link_hash_table_create (bfd *abfd)
800 {
801 struct elf_s390_link_hash_table *ret;
802 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
803
804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
805 if (ret == NULL)
806 return NULL;
807
808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
809 sizeof (struct elf_s390_link_hash_entry),
810 S390_ELF_DATA))
811 {
812 free (ret);
813 return NULL;
814 }
815
816 return &ret->elf.root;
817 }
818
819 /* Copy the extra info we tack onto an elf_link_hash_entry. */
820
821 static void
822 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
823 struct elf_link_hash_entry *dir,
824 struct elf_link_hash_entry *ind)
825 {
826 struct elf_s390_link_hash_entry *edir, *eind;
827
828 edir = (struct elf_s390_link_hash_entry *) dir;
829 eind = (struct elf_s390_link_hash_entry *) ind;
830
831 if (eind->dyn_relocs != NULL)
832 {
833 if (edir->dyn_relocs != NULL)
834 {
835 struct elf_dyn_relocs **pp;
836 struct elf_dyn_relocs *p;
837
838 /* Add reloc counts against the indirect sym to the direct sym
839 list. Merge any entries against the same section. */
840 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
841 {
842 struct elf_dyn_relocs *q;
843
844 for (q = edir->dyn_relocs; q != NULL; q = q->next)
845 if (q->sec == p->sec)
846 {
847 q->pc_count += p->pc_count;
848 q->count += p->count;
849 *pp = p->next;
850 break;
851 }
852 if (q == NULL)
853 pp = &p->next;
854 }
855 *pp = edir->dyn_relocs;
856 }
857
858 edir->dyn_relocs = eind->dyn_relocs;
859 eind->dyn_relocs = NULL;
860 }
861
862 if (ind->root.type == bfd_link_hash_indirect
863 && dir->got.refcount <= 0)
864 {
865 edir->tls_type = eind->tls_type;
866 eind->tls_type = GOT_UNKNOWN;
867 }
868
869 if (ELIMINATE_COPY_RELOCS
870 && ind->root.type != bfd_link_hash_indirect
871 && dir->dynamic_adjusted)
872 {
873 /* If called to transfer flags for a weakdef during processing
874 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
875 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
876 if (dir->versioned != versioned_hidden)
877 dir->ref_dynamic |= ind->ref_dynamic;
878 dir->ref_regular |= ind->ref_regular;
879 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
880 dir->needs_plt |= ind->needs_plt;
881 }
882 else
883 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
884 }
885
886 static int
887 elf_s390_tls_transition (struct bfd_link_info *info,
888 int r_type,
889 int is_local)
890 {
891 if (bfd_link_pic (info))
892 return r_type;
893
894 switch (r_type)
895 {
896 case R_390_TLS_GD32:
897 case R_390_TLS_IE32:
898 if (is_local)
899 return R_390_TLS_LE32;
900 return R_390_TLS_IE32;
901 case R_390_TLS_GOTIE32:
902 if (is_local)
903 return R_390_TLS_LE32;
904 return R_390_TLS_GOTIE32;
905 case R_390_TLS_LDM32:
906 return R_390_TLS_LE32;
907 }
908
909 return r_type;
910 }
911
912 /* Look through the relocs for a section during the first phase, and
913 allocate space in the global offset table or procedure linkage
914 table. */
915
916 static bfd_boolean
917 elf_s390_check_relocs (bfd *abfd,
918 struct bfd_link_info *info,
919 asection *sec,
920 const Elf_Internal_Rela *relocs)
921 {
922 struct elf_s390_link_hash_table *htab;
923 Elf_Internal_Shdr *symtab_hdr;
924 struct elf_link_hash_entry **sym_hashes;
925 const Elf_Internal_Rela *rel;
926 const Elf_Internal_Rela *rel_end;
927 asection *sreloc;
928 bfd_signed_vma *local_got_refcounts;
929 int tls_type, old_tls_type;
930 Elf_Internal_Sym *isym;
931
932 if (bfd_link_relocatable (info))
933 return TRUE;
934
935 BFD_ASSERT (is_s390_elf (abfd));
936
937 htab = elf_s390_hash_table (info);
938 symtab_hdr = &elf_symtab_hdr (abfd);
939 sym_hashes = elf_sym_hashes (abfd);
940 local_got_refcounts = elf_local_got_refcounts (abfd);
941
942 sreloc = NULL;
943
944 rel_end = relocs + sec->reloc_count;
945 for (rel = relocs; rel < rel_end; rel++)
946 {
947 unsigned int r_type;
948 unsigned long r_symndx;
949 struct elf_link_hash_entry *h;
950
951 r_symndx = ELF32_R_SYM (rel->r_info);
952
953 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
954 {
955 /* xgettext:c-format */
956 _bfd_error_handler (_("%B: bad symbol index: %d"),
957 abfd, r_symndx);
958 return FALSE;
959 }
960
961 if (r_symndx < symtab_hdr->sh_info)
962 {
963 /* A local symbol. */
964 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
965 abfd, r_symndx);
966 if (isym == NULL)
967 return FALSE;
968
969 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
970 {
971 struct plt_entry *plt;
972
973 if (htab->elf.dynobj == NULL)
974 htab->elf.dynobj = abfd;
975
976 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
977 return FALSE;
978
979 if (local_got_refcounts == NULL)
980 {
981 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
982 return FALSE;
983 local_got_refcounts = elf_local_got_refcounts (abfd);
984 }
985 plt = elf_s390_local_plt (abfd);
986 plt[r_symndx].plt.refcount++;
987 }
988 h = NULL;
989 }
990 else
991 {
992 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
993 while (h->root.type == bfd_link_hash_indirect
994 || h->root.type == bfd_link_hash_warning)
995 h = (struct elf_link_hash_entry *) h->root.u.i.link;
996
997 /* PR15323, ref flags aren't set for references in the same
998 object. */
999 h->root.non_ir_ref = 1;
1000 }
1001
1002 /* Create got section and local_got_refcounts array if they
1003 are needed. */
1004 r_type = elf_s390_tls_transition (info,
1005 ELF32_R_TYPE (rel->r_info),
1006 h == NULL);
1007 switch (r_type)
1008 {
1009 case R_390_GOT12:
1010 case R_390_GOT16:
1011 case R_390_GOT20:
1012 case R_390_GOT32:
1013 case R_390_GOTENT:
1014 case R_390_GOTPLT12:
1015 case R_390_GOTPLT16:
1016 case R_390_GOTPLT20:
1017 case R_390_GOTPLT32:
1018 case R_390_GOTPLTENT:
1019 case R_390_TLS_GD32:
1020 case R_390_TLS_GOTIE12:
1021 case R_390_TLS_GOTIE20:
1022 case R_390_TLS_GOTIE32:
1023 case R_390_TLS_IEENT:
1024 case R_390_TLS_IE32:
1025 case R_390_TLS_LDM32:
1026 if (h == NULL
1027 && local_got_refcounts == NULL)
1028 {
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1030 return FALSE;
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1032 }
1033 /* Fall through. */
1034 case R_390_GOTOFF16:
1035 case R_390_GOTOFF32:
1036 case R_390_GOTPC:
1037 case R_390_GOTPCDBL:
1038 if (htab->elf.sgot == NULL)
1039 {
1040 if (htab->elf.dynobj == NULL)
1041 htab->elf.dynobj = abfd;
1042 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1043 return FALSE;
1044 }
1045 }
1046
1047 if (h != NULL)
1048 {
1049 if (htab->elf.dynobj == NULL)
1050 htab->elf.dynobj = abfd;
1051 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1052 return FALSE;
1053
1054 /* Make sure an IFUNC symbol defined in a non-shared object
1055 always gets a PLT slot. */
1056 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1057 {
1058 /* The symbol is called by the dynamic loader in order
1059 to resolve the relocation. So it is in fact also
1060 referenced. */
1061 h->ref_regular = 1;
1062 h->needs_plt = 1;
1063 }
1064 }
1065 switch (r_type)
1066 {
1067 case R_390_GOTPC:
1068 case R_390_GOTPCDBL:
1069 /* These relocs do not need a GOT slot. They just load the
1070 GOT pointer itself or address something else relative to
1071 the GOT. Since the GOT pointer has been set up above we
1072 are done. */
1073 break;
1074 case R_390_GOTOFF16:
1075 case R_390_GOTOFF32:
1076 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1077 break;
1078 /* Fall through. */
1079
1080 case R_390_PLT12DBL:
1081 case R_390_PLT16DBL:
1082 case R_390_PLT24DBL:
1083 case R_390_PLT32DBL:
1084 case R_390_PLT32:
1085 case R_390_PLTOFF16:
1086 case R_390_PLTOFF32:
1087 /* This symbol requires a procedure linkage table entry. We
1088 actually build the entry in adjust_dynamic_symbol,
1089 because this might be a case of linking PIC code which is
1090 never referenced by a dynamic object, in which case we
1091 don't need to generate a procedure linkage table entry
1092 after all. */
1093
1094 /* If this is a local symbol, we resolve it directly without
1095 creating a procedure linkage table entry. */
1096 if (h != NULL)
1097 {
1098 h->needs_plt = 1;
1099 h->plt.refcount += 1;
1100 }
1101 break;
1102
1103 case R_390_GOTPLT12:
1104 case R_390_GOTPLT16:
1105 case R_390_GOTPLT20:
1106 case R_390_GOTPLT32:
1107 case R_390_GOTPLTENT:
1108 /* This symbol requires either a procedure linkage table entry
1109 or an entry in the local got. We actually build the entry
1110 in adjust_dynamic_symbol because whether this is really a
1111 global reference can change and with it the fact if we have
1112 to create a plt entry or a local got entry. To be able to
1113 make a once global symbol a local one we have to keep track
1114 of the number of gotplt references that exist for this
1115 symbol. */
1116 if (h != NULL)
1117 {
1118 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1119 h->needs_plt = 1;
1120 h->plt.refcount += 1;
1121 }
1122 else
1123 local_got_refcounts[r_symndx] += 1;
1124 break;
1125
1126 case R_390_TLS_LDM32:
1127 htab->tls_ldm_got.refcount += 1;
1128 break;
1129
1130 case R_390_TLS_IE32:
1131 case R_390_TLS_GOTIE12:
1132 case R_390_TLS_GOTIE20:
1133 case R_390_TLS_GOTIE32:
1134 case R_390_TLS_IEENT:
1135 if (bfd_link_pic (info))
1136 info->flags |= DF_STATIC_TLS;
1137 /* Fall through. */
1138
1139 case R_390_GOT12:
1140 case R_390_GOT16:
1141 case R_390_GOT20:
1142 case R_390_GOT32:
1143 case R_390_GOTENT:
1144 case R_390_TLS_GD32:
1145 /* This symbol requires a global offset table entry. */
1146 switch (r_type)
1147 {
1148 default:
1149 case R_390_GOT12:
1150 case R_390_GOT16:
1151 case R_390_GOT20:
1152 case R_390_GOT32:
1153 case R_390_GOTENT:
1154 tls_type = GOT_NORMAL;
1155 break;
1156 case R_390_TLS_GD32:
1157 tls_type = GOT_TLS_GD;
1158 break;
1159 case R_390_TLS_IE32:
1160 case R_390_TLS_GOTIE32:
1161 tls_type = GOT_TLS_IE;
1162 break;
1163 case R_390_TLS_GOTIE12:
1164 case R_390_TLS_GOTIE20:
1165 case R_390_TLS_IEENT:
1166 tls_type = GOT_TLS_IE_NLT;
1167 break;
1168 }
1169
1170 if (h != NULL)
1171 {
1172 h->got.refcount += 1;
1173 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1174 }
1175 else
1176 {
1177 local_got_refcounts[r_symndx] += 1;
1178 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1179 }
1180 /* If a TLS symbol is accessed using IE at least once,
1181 there is no point to use dynamic model for it. */
1182 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1183 {
1184 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1185 {
1186 _bfd_error_handler
1187 /* xgettext:c-format */
1188 (_("%B: `%s' accessed both as normal and thread local symbol"),
1189 abfd, h->root.root.string);
1190 return FALSE;
1191 }
1192 if (old_tls_type > tls_type)
1193 tls_type = old_tls_type;
1194 }
1195
1196 if (old_tls_type != tls_type)
1197 {
1198 if (h != NULL)
1199 elf_s390_hash_entry (h)->tls_type = tls_type;
1200 else
1201 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1202 }
1203
1204 if (r_type != R_390_TLS_IE32)
1205 break;
1206 /* Fall through. */
1207
1208 case R_390_TLS_LE32:
1209 /* For static linking and executables this reloc will be
1210 calculated at linktime otherwise a TLS_TPOFF runtime
1211 reloc will be generated. */
1212 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1213 break;
1214
1215 if (!bfd_link_pic (info))
1216 break;
1217 info->flags |= DF_STATIC_TLS;
1218 /* Fall through. */
1219
1220 case R_390_8:
1221 case R_390_16:
1222 case R_390_32:
1223 case R_390_PC16:
1224 case R_390_PC12DBL:
1225 case R_390_PC16DBL:
1226 case R_390_PC24DBL:
1227 case R_390_PC32DBL:
1228 case R_390_PC32:
1229 if (h != NULL && bfd_link_executable (info))
1230 {
1231 /* If this reloc is in a read-only section, we might
1232 need a copy reloc. We can't check reliably at this
1233 stage whether the section is read-only, as input
1234 sections have not yet been mapped to output sections.
1235 Tentatively set the flag for now, and correct in
1236 adjust_dynamic_symbol. */
1237 h->non_got_ref = 1;
1238
1239 if (!bfd_link_pic (info))
1240 {
1241 /* We may need a .plt entry if the function this reloc
1242 refers to is in a shared lib. */
1243 h->plt.refcount += 1;
1244 }
1245 }
1246
1247 /* If we are creating a shared library, and this is a reloc
1248 against a global symbol, or a non PC relative reloc
1249 against a local symbol, then we need to copy the reloc
1250 into the shared library. However, if we are linking with
1251 -Bsymbolic, we do not need to copy a reloc against a
1252 global symbol which is defined in an object we are
1253 including in the link (i.e., DEF_REGULAR is set). At
1254 this point we have not seen all the input files, so it is
1255 possible that DEF_REGULAR is not set now but will be set
1256 later (it is never cleared). In case of a weak definition,
1257 DEF_REGULAR may be cleared later by a strong definition in
1258 a shared library. We account for that possibility below by
1259 storing information in the relocs_copied field of the hash
1260 table entry. A similar situation occurs when creating
1261 shared libraries and symbol visibility changes render the
1262 symbol local.
1263
1264 If on the other hand, we are creating an executable, we
1265 may need to keep relocations for symbols satisfied by a
1266 dynamic library if we manage to avoid copy relocs for the
1267 symbol. */
1268 if ((bfd_link_pic (info)
1269 && (sec->flags & SEC_ALLOC) != 0
1270 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1272 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1273 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1274 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1275 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1276 || (h != NULL
1277 && (! SYMBOLIC_BIND (info, h)
1278 || h->root.type == bfd_link_hash_defweak
1279 || !h->def_regular))))
1280 || (ELIMINATE_COPY_RELOCS
1281 && !bfd_link_pic (info)
1282 && (sec->flags & SEC_ALLOC) != 0
1283 && h != NULL
1284 && (h->root.type == bfd_link_hash_defweak
1285 || !h->def_regular)))
1286 {
1287 struct elf_dyn_relocs *p;
1288 struct elf_dyn_relocs **head;
1289
1290 /* We must copy these reloc types into the output file.
1291 Create a reloc section in dynobj and make room for
1292 this reloc. */
1293 if (sreloc == NULL)
1294 {
1295 if (htab->elf.dynobj == NULL)
1296 htab->elf.dynobj = abfd;
1297
1298 sreloc = _bfd_elf_make_dynamic_reloc_section
1299 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1300
1301 if (sreloc == NULL)
1302 return FALSE;
1303 }
1304
1305 /* If this is a global symbol, we count the number of
1306 relocations we need for this symbol. */
1307 if (h != NULL)
1308 {
1309 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1310 }
1311 else
1312 {
1313 /* Track dynamic relocs needed for local syms too.
1314 We really need local syms available to do this
1315 easily. Oh well. */
1316 asection *s;
1317 void *vpp;
1318
1319 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1320 abfd, r_symndx);
1321 if (isym == NULL)
1322 return FALSE;
1323
1324 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1325 if (s == NULL)
1326 s = sec;
1327
1328 vpp = &elf_section_data (s)->local_dynrel;
1329 head = (struct elf_dyn_relocs **) vpp;
1330 }
1331
1332 p = *head;
1333 if (p == NULL || p->sec != sec)
1334 {
1335 bfd_size_type amt = sizeof *p;
1336
1337 p = ((struct elf_dyn_relocs *)
1338 bfd_alloc (htab->elf.dynobj, amt));
1339 if (p == NULL)
1340 return FALSE;
1341 p->next = *head;
1342 *head = p;
1343 p->sec = sec;
1344 p->count = 0;
1345 p->pc_count = 0;
1346 }
1347
1348 p->count += 1;
1349 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1353 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1354 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1355 p->pc_count += 1;
1356 }
1357 break;
1358
1359 /* This relocation describes the C++ object vtable hierarchy.
1360 Reconstruct it for later use during GC. */
1361 case R_390_GNU_VTINHERIT:
1362 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1363 return FALSE;
1364 break;
1365
1366 /* This relocation describes which C++ vtable entries are actually
1367 used. Record for later use during GC. */
1368 case R_390_GNU_VTENTRY:
1369 BFD_ASSERT (h != NULL);
1370 if (h != NULL
1371 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1372 return FALSE;
1373 break;
1374
1375 default:
1376 break;
1377 }
1378 }
1379
1380 return TRUE;
1381 }
1382
1383 /* Return the section that should be marked against GC for a given
1384 relocation. */
1385
1386 static asection *
1387 elf_s390_gc_mark_hook (asection *sec,
1388 struct bfd_link_info *info,
1389 Elf_Internal_Rela *rel,
1390 struct elf_link_hash_entry *h,
1391 Elf_Internal_Sym *sym)
1392 {
1393 if (h != NULL)
1394 switch (ELF32_R_TYPE (rel->r_info))
1395 {
1396 case R_390_GNU_VTINHERIT:
1397 case R_390_GNU_VTENTRY:
1398 return NULL;
1399 }
1400 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1401
1402 }
1403
1404 /* Update the got entry reference counts for the section being removed. */
1405
1406 static bfd_boolean
1407 elf_s390_gc_sweep_hook (bfd *abfd,
1408 struct bfd_link_info *info,
1409 asection *sec,
1410 const Elf_Internal_Rela *relocs)
1411 {
1412 struct elf_s390_link_hash_table *htab;
1413 Elf_Internal_Shdr *symtab_hdr;
1414 struct elf_link_hash_entry **sym_hashes;
1415 bfd_signed_vma *local_got_refcounts;
1416 const Elf_Internal_Rela *rel, *relend;
1417
1418 if (bfd_link_relocatable (info))
1419 return TRUE;
1420
1421 htab = elf_s390_hash_table (info);
1422 if (htab == NULL)
1423 return FALSE;
1424
1425 elf_section_data (sec)->local_dynrel = NULL;
1426
1427 symtab_hdr = &elf_symtab_hdr (abfd);
1428 sym_hashes = elf_sym_hashes (abfd);
1429 local_got_refcounts = elf_local_got_refcounts (abfd);
1430
1431 relend = relocs + sec->reloc_count;
1432 for (rel = relocs; rel < relend; rel++)
1433 {
1434 unsigned long r_symndx;
1435 unsigned int r_type;
1436 struct elf_link_hash_entry *h = NULL;
1437
1438 r_symndx = ELF32_R_SYM (rel->r_info);
1439 if (r_symndx >= symtab_hdr->sh_info)
1440 {
1441 struct elf_s390_link_hash_entry *eh;
1442 struct elf_dyn_relocs **pp;
1443 struct elf_dyn_relocs *p;
1444
1445 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1446 while (h->root.type == bfd_link_hash_indirect
1447 || h->root.type == bfd_link_hash_warning)
1448 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1449 eh = (struct elf_s390_link_hash_entry *) h;
1450
1451 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1452 if (p->sec == sec)
1453 {
1454 /* Everything must go for SEC. */
1455 *pp = p->next;
1456 break;
1457 }
1458 }
1459 else
1460 {
1461 Elf_Internal_Sym *isym;
1462
1463 /* A local symbol. */
1464 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1465 abfd, r_symndx);
1466 if (isym == NULL)
1467 return FALSE;
1468
1469 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1470 {
1471 struct plt_entry *plt = elf_s390_local_plt (abfd);
1472 if (plt[r_symndx].plt.refcount > 0)
1473 plt[r_symndx].plt.refcount--;
1474 }
1475 }
1476
1477 r_type = ELF32_R_TYPE (rel->r_info);
1478 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1479 switch (r_type)
1480 {
1481 case R_390_TLS_LDM32:
1482 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1483 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1484 break;
1485
1486 case R_390_GOTOFF16:
1487 case R_390_GOTOFF32:
1488 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1489 {
1490 h->plt.refcount--;
1491 break;
1492 }
1493
1494 case R_390_GOTPC:
1495 case R_390_GOTPCDBL:
1496 break;
1497
1498 case R_390_TLS_GD32:
1499 case R_390_TLS_IE32:
1500 case R_390_TLS_GOTIE12:
1501 case R_390_TLS_GOTIE20:
1502 case R_390_TLS_GOTIE32:
1503 case R_390_TLS_IEENT:
1504 case R_390_GOT12:
1505 case R_390_GOT16:
1506 case R_390_GOT20:
1507 case R_390_GOT32:
1508 case R_390_GOTENT:
1509 if (h != NULL)
1510 {
1511 if (h->got.refcount > 0)
1512 h->got.refcount -= 1;
1513 }
1514 else if (local_got_refcounts != NULL)
1515 {
1516 if (local_got_refcounts[r_symndx] > 0)
1517 local_got_refcounts[r_symndx] -= 1;
1518 }
1519 break;
1520
1521 case R_390_8:
1522 case R_390_12:
1523 case R_390_16:
1524 case R_390_20:
1525 case R_390_32:
1526 case R_390_PC16:
1527 case R_390_PC12DBL:
1528 case R_390_PC16DBL:
1529 case R_390_PC24DBL:
1530 case R_390_PC32DBL:
1531 case R_390_PC32:
1532 if (bfd_link_pic (info))
1533 break;
1534 /* Fall through. */
1535
1536 case R_390_PLT12DBL:
1537 case R_390_PLT16DBL:
1538 case R_390_PLT24DBL:
1539 case R_390_PLT32DBL:
1540 case R_390_PLT32:
1541 case R_390_PLTOFF16:
1542 case R_390_PLTOFF32:
1543 if (h != NULL)
1544 {
1545 if (h->plt.refcount > 0)
1546 h->plt.refcount -= 1;
1547 }
1548 break;
1549
1550 case R_390_GOTPLT12:
1551 case R_390_GOTPLT16:
1552 case R_390_GOTPLT20:
1553 case R_390_GOTPLT32:
1554 case R_390_GOTPLTENT:
1555 if (h != NULL)
1556 {
1557 if (h->plt.refcount > 0)
1558 {
1559 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1560 h->plt.refcount -= 1;
1561 }
1562 }
1563 else if (local_got_refcounts != NULL)
1564 {
1565 if (local_got_refcounts[r_symndx] > 0)
1566 local_got_refcounts[r_symndx] -= 1;
1567 }
1568 break;
1569
1570 default:
1571 break;
1572 }
1573 }
1574
1575 return TRUE;
1576 }
1577
1578 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1579 entry but we found we will not create any. Called when we find we will
1580 not have any PLT for this symbol, by for example
1581 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1582 or elf_s390_size_dynamic_sections if no dynamic sections will be
1583 created (we're only linking static objects). */
1584
1585 static void
1586 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1587 {
1588 if (h->elf.root.type == bfd_link_hash_warning)
1589 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1590
1591 if (h->gotplt_refcount <= 0)
1592 return;
1593
1594 /* We simply add the number of gotplt references to the number
1595 * of got references for this symbol. */
1596 h->elf.got.refcount += h->gotplt_refcount;
1597 h->gotplt_refcount = -1;
1598 }
1599
1600 /* Adjust a symbol defined by a dynamic object and referenced by a
1601 regular object. The current definition is in some section of the
1602 dynamic object, but we're not including those sections. We have to
1603 change the definition to something the rest of the link can
1604 understand. */
1605
1606 static bfd_boolean
1607 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1608 struct elf_link_hash_entry *h)
1609 {
1610 struct elf_s390_link_hash_table *htab;
1611 asection *s, *srel;
1612
1613 /* STT_GNU_IFUNC symbol must go through PLT. */
1614 if (s390_is_ifunc_symbol_p (h))
1615 {
1616 /* All local STT_GNU_IFUNC references must be treated as local
1617 calls via local PLT. */
1618 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1619 {
1620 bfd_size_type pc_count = 0, count = 0;
1621 struct elf_dyn_relocs **pp;
1622 struct elf_s390_link_hash_entry *eh;
1623 struct elf_dyn_relocs *p;
1624
1625 eh = (struct elf_s390_link_hash_entry *) h;
1626 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1627 {
1628 pc_count += p->pc_count;
1629 p->count -= p->pc_count;
1630 p->pc_count = 0;
1631 count += p->count;
1632 if (p->count == 0)
1633 *pp = p->next;
1634 else
1635 pp = &p->next;
1636 }
1637
1638 if (pc_count || count)
1639 {
1640 h->needs_plt = 1;
1641 h->non_got_ref = 1;
1642 if (h->plt.refcount <= 0)
1643 h->plt.refcount = 1;
1644 else
1645 h->plt.refcount += 1;
1646 }
1647 }
1648
1649 if (h->plt.refcount <= 0)
1650 {
1651 h->plt.offset = (bfd_vma) -1;
1652 h->needs_plt = 0;
1653 }
1654 return TRUE;
1655 }
1656
1657 /* If this is a function, put it in the procedure linkage table. We
1658 will fill in the contents of the procedure linkage table later
1659 (although we could actually do it here). */
1660 if (h->type == STT_FUNC
1661 || h->needs_plt)
1662 {
1663 if (h->plt.refcount <= 0
1664 || SYMBOL_CALLS_LOCAL (info, h)
1665 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1666 && h->root.type != bfd_link_hash_undefweak))
1667 {
1668 /* This case can occur if we saw a PLT32 reloc in an input
1669 file, but the symbol was never referred to by a dynamic
1670 object, or if all references were garbage collected. In
1671 such a case, we don't actually need to build a procedure
1672 linkage table, and we can just do a PC32 reloc instead. */
1673 h->plt.offset = (bfd_vma) -1;
1674 h->needs_plt = 0;
1675 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1676 }
1677
1678 return TRUE;
1679 }
1680 else
1681 /* It's possible that we incorrectly decided a .plt reloc was
1682 needed for an R_390_PC32 reloc to a non-function sym in
1683 check_relocs. We can't decide accurately between function and
1684 non-function syms in check-relocs; Objects loaded later in
1685 the link may change h->type. So fix it now. */
1686 h->plt.offset = (bfd_vma) -1;
1687
1688 /* If this is a weak symbol, and there is a real definition, the
1689 processor independent code will have arranged for us to see the
1690 real definition first, and we can just use the same value. */
1691 if (h->u.weakdef != NULL)
1692 {
1693 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1694 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1695 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1696 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1697 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1698 h->non_got_ref = h->u.weakdef->non_got_ref;
1699 return TRUE;
1700 }
1701
1702 /* This is a reference to a symbol defined by a dynamic object which
1703 is not a function. */
1704
1705 /* If we are creating a shared library, we must presume that the
1706 only references to the symbol are via the global offset table.
1707 For such cases we need not do anything here; the relocations will
1708 be handled correctly by relocate_section. */
1709 if (bfd_link_pic (info))
1710 return TRUE;
1711
1712 /* If there are no references to this symbol that do not use the
1713 GOT, we don't need to generate a copy reloc. */
1714 if (!h->non_got_ref)
1715 return TRUE;
1716
1717 /* If -z nocopyreloc was given, we won't generate them either. */
1718 if (info->nocopyreloc)
1719 {
1720 h->non_got_ref = 0;
1721 return TRUE;
1722 }
1723
1724 if (ELIMINATE_COPY_RELOCS)
1725 {
1726 struct elf_s390_link_hash_entry * eh;
1727 struct elf_dyn_relocs *p;
1728
1729 eh = (struct elf_s390_link_hash_entry *) h;
1730 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1731 {
1732 s = p->sec->output_section;
1733 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1734 break;
1735 }
1736
1737 /* If we didn't find any dynamic relocs in read-only sections, then
1738 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1739 if (p == NULL)
1740 {
1741 h->non_got_ref = 0;
1742 return TRUE;
1743 }
1744 }
1745
1746 /* We must allocate the symbol in our .dynbss section, which will
1747 become part of the .bss section of the executable. There will be
1748 an entry for this symbol in the .dynsym section. The dynamic
1749 object will contain position independent code, so all references
1750 from the dynamic object to this symbol will go through the global
1751 offset table. The dynamic linker will use the .dynsym entry to
1752 determine the address it must put in the global offset table, so
1753 both the dynamic object and the regular object will refer to the
1754 same memory location for the variable. */
1755
1756 htab = elf_s390_hash_table (info);
1757
1758 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1759 copy the initial value out of the dynamic object and into the
1760 runtime process image. */
1761 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1762 {
1763 s = htab->elf.sdynrelro;
1764 srel = htab->elf.sreldynrelro;
1765 }
1766 else
1767 {
1768 s = htab->elf.sdynbss;
1769 srel = htab->elf.srelbss;
1770 }
1771 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1772 {
1773 srel->size += sizeof (Elf32_External_Rela);
1774 h->needs_copy = 1;
1775 }
1776
1777 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1778 }
1779
1780 /* Allocate space in .plt, .got and associated reloc sections for
1781 dynamic relocs. */
1782
1783 static bfd_boolean
1784 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1785 {
1786 struct bfd_link_info *info;
1787 struct elf_s390_link_hash_table *htab;
1788 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1789 struct elf_dyn_relocs *p;
1790
1791 if (h->root.type == bfd_link_hash_indirect)
1792 return TRUE;
1793
1794 info = (struct bfd_link_info *) inf;
1795 htab = elf_s390_hash_table (info);
1796
1797 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1798 here if it is defined and referenced in a non-shared object. */
1799 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1800 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1801 else if (htab->elf.dynamic_sections_created
1802 && h->plt.refcount > 0)
1803 {
1804 /* Make sure this symbol is output as a dynamic symbol.
1805 Undefined weak syms won't yet be marked as dynamic. */
1806 if (h->dynindx == -1
1807 && !h->forced_local)
1808 {
1809 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1810 return FALSE;
1811 }
1812
1813 if (bfd_link_pic (info)
1814 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1815 {
1816 asection *s = htab->elf.splt;
1817
1818 /* If this is the first .plt entry, make room for the special
1819 first entry. */
1820 if (s->size == 0)
1821 s->size += PLT_FIRST_ENTRY_SIZE;
1822
1823 h->plt.offset = s->size;
1824
1825 /* If this symbol is not defined in a regular file, and we are
1826 not generating a shared library, then set the symbol to this
1827 location in the .plt. This is required to make function
1828 pointers compare as equal between the normal executable and
1829 the shared library. */
1830 if (! bfd_link_pic (info)
1831 && !h->def_regular)
1832 {
1833 h->root.u.def.section = s;
1834 h->root.u.def.value = h->plt.offset;
1835 }
1836
1837 /* Make room for this entry. */
1838 s->size += PLT_ENTRY_SIZE;
1839
1840 /* We also need to make an entry in the .got.plt section, which
1841 will be placed in the .got section by the linker script. */
1842 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1843
1844 /* We also need to make an entry in the .rela.plt section. */
1845 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1846 }
1847 else
1848 {
1849 h->plt.offset = (bfd_vma) -1;
1850 h->needs_plt = 0;
1851 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1852 }
1853 }
1854 else
1855 {
1856 h->plt.offset = (bfd_vma) -1;
1857 h->needs_plt = 0;
1858 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1859 }
1860
1861 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1862 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1863 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1864 we can save the dynamic TLS relocation. */
1865 if (h->got.refcount > 0
1866 && !bfd_link_pic (info)
1867 && h->dynindx == -1
1868 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1869 {
1870 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1871 /* For the GOTIE access without a literal pool entry the offset has
1872 to be stored somewhere. The immediate value in the instruction
1873 is not bit enough so the value is stored in the got. */
1874 {
1875 h->got.offset = htab->elf.sgot->size;
1876 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1877 }
1878 else
1879 h->got.offset = (bfd_vma) -1;
1880 }
1881 else if (h->got.refcount > 0)
1882 {
1883 asection *s;
1884 bfd_boolean dyn;
1885 int tls_type = elf_s390_hash_entry(h)->tls_type;
1886
1887 /* Make sure this symbol is output as a dynamic symbol.
1888 Undefined weak syms won't yet be marked as dynamic. */
1889 if (h->dynindx == -1
1890 && !h->forced_local)
1891 {
1892 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1893 return FALSE;
1894 }
1895
1896 s = htab->elf.sgot;
1897 h->got.offset = s->size;
1898 s->size += GOT_ENTRY_SIZE;
1899 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1900 if (tls_type == GOT_TLS_GD)
1901 s->size += GOT_ENTRY_SIZE;
1902 dyn = htab->elf.dynamic_sections_created;
1903 /* R_390_TLS_IE32 needs one dynamic relocation,
1904 R_390_TLS_GD32 needs one if local symbol and two if global. */
1905 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1906 || tls_type >= GOT_TLS_IE)
1907 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1908 else if (tls_type == GOT_TLS_GD)
1909 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1910 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1911 || h->root.type != bfd_link_hash_undefweak)
1912 && (bfd_link_pic (info)
1913 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1914 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1915 }
1916 else
1917 h->got.offset = (bfd_vma) -1;
1918
1919 if (eh->dyn_relocs == NULL)
1920 return TRUE;
1921
1922 /* In the shared -Bsymbolic case, discard space allocated for
1923 dynamic pc-relative relocs against symbols which turn out to be
1924 defined in regular objects. For the normal shared case, discard
1925 space for pc-relative relocs that have become local due to symbol
1926 visibility changes. */
1927
1928 if (bfd_link_pic (info))
1929 {
1930 if (SYMBOL_CALLS_LOCAL (info, h))
1931 {
1932 struct elf_dyn_relocs **pp;
1933
1934 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1935 {
1936 p->count -= p->pc_count;
1937 p->pc_count = 0;
1938 if (p->count == 0)
1939 *pp = p->next;
1940 else
1941 pp = &p->next;
1942 }
1943 }
1944
1945 /* Also discard relocs on undefined weak syms with non-default
1946 visibility. */
1947 if (eh->dyn_relocs != NULL
1948 && h->root.type == bfd_link_hash_undefweak)
1949 {
1950 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1951 eh->dyn_relocs = NULL;
1952
1953 /* Make sure undefined weak symbols are output as a dynamic
1954 symbol in PIEs. */
1955 else if (h->dynindx == -1
1956 && !h->forced_local)
1957 {
1958 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1959 return FALSE;
1960 }
1961 }
1962 }
1963 else if (ELIMINATE_COPY_RELOCS)
1964 {
1965 /* For the non-shared case, discard space for relocs against
1966 symbols which turn out to need copy relocs or are not
1967 dynamic. */
1968
1969 if (!h->non_got_ref
1970 && ((h->def_dynamic
1971 && !h->def_regular)
1972 || (htab->elf.dynamic_sections_created
1973 && (h->root.type == bfd_link_hash_undefweak
1974 || h->root.type == bfd_link_hash_undefined))))
1975 {
1976 /* Make sure this symbol is output as a dynamic symbol.
1977 Undefined weak syms won't yet be marked as dynamic. */
1978 if (h->dynindx == -1
1979 && !h->forced_local)
1980 {
1981 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1982 return FALSE;
1983 }
1984
1985 /* If that succeeded, we know we'll be keeping all the
1986 relocs. */
1987 if (h->dynindx != -1)
1988 goto keep;
1989 }
1990
1991 eh->dyn_relocs = NULL;
1992
1993 keep: ;
1994 }
1995
1996 /* Finally, allocate space. */
1997 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1998 {
1999 asection *sreloc = elf_section_data (p->sec)->sreloc;
2000
2001 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2002 }
2003
2004 return TRUE;
2005 }
2006
2007 /* Find any dynamic relocs that apply to read-only sections. */
2008
2009 static bfd_boolean
2010 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2011 {
2012 struct elf_s390_link_hash_entry *eh;
2013 struct elf_dyn_relocs *p;
2014
2015 eh = (struct elf_s390_link_hash_entry *) h;
2016 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2017 {
2018 asection *s = p->sec->output_section;
2019
2020 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2021 {
2022 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2023
2024 info->flags |= DF_TEXTREL;
2025
2026 /* Not an error, just cut short the traversal. */
2027 return FALSE;
2028 }
2029 }
2030 return TRUE;
2031 }
2032
2033 /* Set the sizes of the dynamic sections. */
2034
2035 static bfd_boolean
2036 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2037 struct bfd_link_info *info)
2038 {
2039 struct elf_s390_link_hash_table *htab;
2040 bfd *dynobj;
2041 asection *s;
2042 bfd_boolean relocs;
2043 bfd *ibfd;
2044
2045 htab = elf_s390_hash_table (info);
2046 dynobj = htab->elf.dynobj;
2047 if (dynobj == NULL)
2048 abort ();
2049
2050 if (htab->elf.dynamic_sections_created)
2051 {
2052 /* Set the contents of the .interp section to the interpreter. */
2053 if (bfd_link_executable (info) && !info->nointerp)
2054 {
2055 s = bfd_get_linker_section (dynobj, ".interp");
2056 if (s == NULL)
2057 abort ();
2058 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2059 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2060 }
2061 }
2062
2063 /* Set up .got offsets for local syms, and space for local dynamic
2064 relocs. */
2065 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2066 {
2067 bfd_signed_vma *local_got;
2068 bfd_signed_vma *end_local_got;
2069 char *local_tls_type;
2070 bfd_size_type locsymcount;
2071 Elf_Internal_Shdr *symtab_hdr;
2072 asection *srela;
2073 struct plt_entry *local_plt;
2074 unsigned int i;
2075
2076 if (! is_s390_elf (ibfd))
2077 continue;
2078
2079 for (s = ibfd->sections; s != NULL; s = s->next)
2080 {
2081 struct elf_dyn_relocs *p;
2082
2083 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2084 {
2085 if (!bfd_is_abs_section (p->sec)
2086 && bfd_is_abs_section (p->sec->output_section))
2087 {
2088 /* Input section has been discarded, either because
2089 it is a copy of a linkonce section or due to
2090 linker script /DISCARD/, so we'll be discarding
2091 the relocs too. */
2092 }
2093 else if (p->count != 0)
2094 {
2095 srela = elf_section_data (p->sec)->sreloc;
2096 srela->size += p->count * sizeof (Elf32_External_Rela);
2097 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2098 info->flags |= DF_TEXTREL;
2099 }
2100 }
2101 }
2102
2103 local_got = elf_local_got_refcounts (ibfd);
2104 if (!local_got)
2105 continue;
2106
2107 symtab_hdr = &elf_symtab_hdr (ibfd);
2108 locsymcount = symtab_hdr->sh_info;
2109 end_local_got = local_got + locsymcount;
2110 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2111 s = htab->elf.sgot;
2112 srela = htab->elf.srelgot;
2113 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2114 {
2115 if (*local_got > 0)
2116 {
2117 *local_got = s->size;
2118 s->size += GOT_ENTRY_SIZE;
2119 if (*local_tls_type == GOT_TLS_GD)
2120 s->size += GOT_ENTRY_SIZE;
2121 if (bfd_link_pic (info))
2122 srela->size += sizeof (Elf32_External_Rela);
2123 }
2124 else
2125 *local_got = (bfd_vma) -1;
2126 }
2127 local_plt = elf_s390_local_plt (ibfd);
2128 for (i = 0; i < symtab_hdr->sh_info; i++)
2129 {
2130 if (local_plt[i].plt.refcount > 0)
2131 {
2132 local_plt[i].plt.offset = htab->elf.iplt->size;
2133 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2134 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2135 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2136 }
2137 else
2138 local_plt[i].plt.offset = (bfd_vma) -1;
2139 }
2140 }
2141
2142 if (htab->tls_ldm_got.refcount > 0)
2143 {
2144 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2145 relocs. */
2146 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2147 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2148 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2149 }
2150 else
2151 htab->tls_ldm_got.offset = -1;
2152
2153 /* Allocate global sym .plt and .got entries, and space for global
2154 sym dynamic relocs. */
2155 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2156
2157 /* We now have determined the sizes of the various dynamic sections.
2158 Allocate memory for them. */
2159 relocs = FALSE;
2160 for (s = dynobj->sections; s != NULL; s = s->next)
2161 {
2162 if ((s->flags & SEC_LINKER_CREATED) == 0)
2163 continue;
2164
2165 if (s == htab->elf.splt
2166 || s == htab->elf.sgot
2167 || s == htab->elf.sgotplt
2168 || s == htab->elf.sdynbss
2169 || s == htab->elf.sdynrelro
2170 || s == htab->elf.iplt
2171 || s == htab->elf.igotplt
2172 || s == htab->irelifunc)
2173 {
2174 /* Strip this section if we don't need it; see the
2175 comment below. */
2176 }
2177 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2178 {
2179 if (s->size != 0)
2180 relocs = TRUE;
2181
2182 /* We use the reloc_count field as a counter if we need
2183 to copy relocs into the output file. */
2184 s->reloc_count = 0;
2185 }
2186 else
2187 {
2188 /* It's not one of our sections, so don't allocate space. */
2189 continue;
2190 }
2191
2192 if (s->size == 0)
2193 {
2194 /* If we don't need this section, strip it from the
2195 output file. This is to handle .rela.bss and
2196 .rela.plt. We must create it in
2197 create_dynamic_sections, because it must be created
2198 before the linker maps input sections to output
2199 sections. The linker does that before
2200 adjust_dynamic_symbol is called, and it is that
2201 function which decides whether anything needs to go
2202 into these sections. */
2203
2204 s->flags |= SEC_EXCLUDE;
2205 continue;
2206 }
2207
2208 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2209 continue;
2210
2211 /* Allocate memory for the section contents. We use bfd_zalloc
2212 here in case unused entries are not reclaimed before the
2213 section's contents are written out. This should not happen,
2214 but this way if it does, we get a R_390_NONE reloc instead
2215 of garbage. */
2216 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2217 if (s->contents == NULL)
2218 return FALSE;
2219 }
2220
2221 if (htab->elf.dynamic_sections_created)
2222 {
2223 /* Add some entries to the .dynamic section. We fill in the
2224 values later, in elf_s390_finish_dynamic_sections, but we
2225 must add the entries now so that we get the correct size for
2226 the .dynamic section. The DT_DEBUG entry is filled in by the
2227 dynamic linker and used by the debugger. */
2228 #define add_dynamic_entry(TAG, VAL) \
2229 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2230
2231 if (bfd_link_executable (info))
2232 {
2233 if (!add_dynamic_entry (DT_DEBUG, 0))
2234 return FALSE;
2235 }
2236
2237 if (htab->elf.splt->size != 0)
2238 {
2239 if (!add_dynamic_entry (DT_PLTGOT, 0)
2240 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2241 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2242 || !add_dynamic_entry (DT_JMPREL, 0))
2243 return FALSE;
2244 }
2245
2246 if (relocs)
2247 {
2248 if (!add_dynamic_entry (DT_RELA, 0)
2249 || !add_dynamic_entry (DT_RELASZ, 0)
2250 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2251 return FALSE;
2252
2253 /* If any dynamic relocs apply to a read-only section,
2254 then we need a DT_TEXTREL entry. */
2255 if ((info->flags & DF_TEXTREL) == 0)
2256 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2257
2258 if ((info->flags & DF_TEXTREL) != 0)
2259 {
2260 if (!add_dynamic_entry (DT_TEXTREL, 0))
2261 return FALSE;
2262 }
2263 }
2264 }
2265 #undef add_dynamic_entry
2266
2267 return TRUE;
2268 }
2269
2270 /* Return the base VMA address which should be subtracted from real addresses
2271 when resolving @dtpoff relocation.
2272 This is PT_TLS segment p_vaddr. */
2273
2274 static bfd_vma
2275 dtpoff_base (struct bfd_link_info *info)
2276 {
2277 /* If tls_sec is NULL, we should have signalled an error already. */
2278 if (elf_hash_table (info)->tls_sec == NULL)
2279 return 0;
2280 return elf_hash_table (info)->tls_sec->vma;
2281 }
2282
2283 /* Return the relocation value for @tpoff relocation
2284 if STT_TLS virtual address is ADDRESS. */
2285
2286 static bfd_vma
2287 tpoff (struct bfd_link_info *info, bfd_vma address)
2288 {
2289 struct elf_link_hash_table *htab = elf_hash_table (info);
2290
2291 /* If tls_sec is NULL, we should have signalled an error already. */
2292 if (htab->tls_sec == NULL)
2293 return 0;
2294 return htab->tls_size + htab->tls_sec->vma - address;
2295 }
2296
2297 /* Complain if TLS instruction relocation is against an invalid
2298 instruction. */
2299
2300 static void
2301 invalid_tls_insn (bfd *input_bfd,
2302 asection *input_section,
2303 Elf_Internal_Rela *rel)
2304 {
2305 reloc_howto_type *howto;
2306
2307 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2308 _bfd_error_handler
2309 /* xgettext:c-format */
2310 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2311 input_bfd,
2312 input_section,
2313 (long) rel->r_offset,
2314 howto->name);
2315 bfd_set_error (bfd_error_bad_value);
2316 }
2317
2318 /* Relocate a 390 ELF section. */
2319
2320 static bfd_boolean
2321 elf_s390_relocate_section (bfd *output_bfd,
2322 struct bfd_link_info *info,
2323 bfd *input_bfd,
2324 asection *input_section,
2325 bfd_byte *contents,
2326 Elf_Internal_Rela *relocs,
2327 Elf_Internal_Sym *local_syms,
2328 asection **local_sections)
2329 {
2330 struct elf_s390_link_hash_table *htab;
2331 Elf_Internal_Shdr *symtab_hdr;
2332 struct elf_link_hash_entry **sym_hashes;
2333 bfd_vma *local_got_offsets;
2334 Elf_Internal_Rela *rel;
2335 Elf_Internal_Rela *relend;
2336
2337 BFD_ASSERT (is_s390_elf (input_bfd));
2338
2339 htab = elf_s390_hash_table (info);
2340 symtab_hdr = &elf_symtab_hdr (input_bfd);
2341 sym_hashes = elf_sym_hashes (input_bfd);
2342 local_got_offsets = elf_local_got_offsets (input_bfd);
2343
2344 rel = relocs;
2345 relend = relocs + input_section->reloc_count;
2346 for (; rel < relend; rel++)
2347 {
2348 unsigned int r_type;
2349 reloc_howto_type *howto;
2350 unsigned long r_symndx;
2351 struct elf_link_hash_entry *h;
2352 Elf_Internal_Sym *sym;
2353 asection *sec;
2354 bfd_vma off;
2355 bfd_vma relocation;
2356 bfd_boolean unresolved_reloc;
2357 bfd_reloc_status_type r;
2358 int tls_type;
2359 asection *base_got = htab->elf.sgot;
2360
2361 r_type = ELF32_R_TYPE (rel->r_info);
2362 if (r_type == (int) R_390_GNU_VTINHERIT
2363 || r_type == (int) R_390_GNU_VTENTRY)
2364 continue;
2365 if (r_type >= (int) R_390_max)
2366 {
2367 bfd_set_error (bfd_error_bad_value);
2368 return FALSE;
2369 }
2370
2371 howto = elf_howto_table + r_type;
2372 r_symndx = ELF32_R_SYM (rel->r_info);
2373
2374 h = NULL;
2375 sym = NULL;
2376 sec = NULL;
2377 unresolved_reloc = FALSE;
2378 if (r_symndx < symtab_hdr->sh_info)
2379 {
2380 sym = local_syms + r_symndx;
2381 sec = local_sections[r_symndx];
2382 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2383 {
2384 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2385 if (local_plt == NULL)
2386 return FALSE;
2387
2388 /* Address of the PLT slot. */
2389 relocation = (htab->elf.iplt->output_section->vma
2390 + htab->elf.iplt->output_offset
2391 + local_plt[r_symndx].plt.offset);
2392
2393 switch (r_type)
2394 {
2395 case R_390_PLTOFF16:
2396 case R_390_PLTOFF32:
2397 relocation -= htab->elf.sgot->output_section->vma;
2398 break;
2399 case R_390_GOTPLT12:
2400 case R_390_GOTPLT16:
2401 case R_390_GOTPLT20:
2402 case R_390_GOTPLT32:
2403 case R_390_GOTPLTENT:
2404 case R_390_GOT12:
2405 case R_390_GOT16:
2406 case R_390_GOT20:
2407 case R_390_GOT32:
2408 case R_390_GOTENT:
2409 {
2410 /* Write the PLT slot address into the GOT slot. */
2411 bfd_put_32 (output_bfd, relocation,
2412 htab->elf.sgot->contents +
2413 local_got_offsets[r_symndx]);
2414 relocation = (local_got_offsets[r_symndx] +
2415 htab->elf.sgot->output_offset);
2416
2417 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2418 relocation += htab->elf.sgot->output_section->vma;
2419 break;
2420 }
2421 default:
2422 break;
2423 }
2424 /* The output section is needed later in
2425 finish_dynamic_section when creating the dynamic
2426 relocation. */
2427 local_plt[r_symndx].sec = sec;
2428 goto do_relocation;
2429 }
2430 else
2431 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2432 }
2433 else
2434 {
2435 bfd_boolean warned ATTRIBUTE_UNUSED;
2436 bfd_boolean ignored ATTRIBUTE_UNUSED;
2437
2438 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2439 r_symndx, symtab_hdr, sym_hashes,
2440 h, sec, relocation,
2441 unresolved_reloc, warned, ignored);
2442 }
2443
2444 if (sec != NULL && discarded_section (sec))
2445 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2446 rel, 1, relend, howto, 0, contents);
2447
2448 if (bfd_link_relocatable (info))
2449 continue;
2450
2451 switch (r_type)
2452 {
2453 case R_390_GOTPLT12:
2454 case R_390_GOTPLT16:
2455 case R_390_GOTPLT20:
2456 case R_390_GOTPLT32:
2457 case R_390_GOTPLTENT:
2458 /* There are three cases for a GOTPLT relocation. 1) The
2459 relocation is against the jump slot entry of a plt that
2460 will get emitted to the output file. 2) The relocation
2461 is against the jump slot of a plt entry that has been
2462 removed. elf_s390_adjust_gotplt has created a GOT entry
2463 as replacement. 3) The relocation is against a local symbol.
2464 Cases 2) and 3) are the same as the GOT relocation code
2465 so we just have to test for case 1 and fall through for
2466 the other two. */
2467 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2468 {
2469 bfd_vma plt_index;
2470
2471 if (s390_is_ifunc_symbol_p (h))
2472 {
2473 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2474 relocation = (plt_index * GOT_ENTRY_SIZE +
2475 htab->elf.igotplt->output_offset);
2476 if (r_type == R_390_GOTPLTENT)
2477 relocation += htab->elf.igotplt->output_section->vma;
2478 }
2479 else
2480 {
2481 /* Calc. index no.
2482 Current offset - size first entry / entry size. */
2483 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2484 PLT_ENTRY_SIZE;
2485
2486 /* Offset in GOT is PLT index plus GOT headers(3)
2487 times 4, addr & GOT addr. */
2488 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2489 if (r_type == R_390_GOTPLTENT)
2490 relocation += htab->elf.sgot->output_section->vma;
2491 }
2492 unresolved_reloc = FALSE;
2493
2494 }
2495 /* Fall through. */
2496
2497 case R_390_GOT12:
2498 case R_390_GOT16:
2499 case R_390_GOT20:
2500 case R_390_GOT32:
2501 case R_390_GOTENT:
2502 /* Relocation is to the entry for this symbol in the global
2503 offset table. */
2504 if (base_got == NULL)
2505 abort ();
2506
2507 if (h != NULL)
2508 {
2509 bfd_boolean dyn;
2510
2511 off = h->got.offset;
2512 dyn = htab->elf.dynamic_sections_created;
2513
2514 if (s390_is_ifunc_symbol_p (h))
2515 {
2516 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2517 if (off == (bfd_vma)-1)
2518 {
2519 /* No explicit GOT usage so redirect to the
2520 got.iplt slot. */
2521 base_got = htab->elf.igotplt;
2522 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2523 }
2524 else
2525 {
2526 /* Explicit GOT slots must contain the address
2527 of the PLT slot. This will be handled in
2528 finish_dynamic_symbol. */
2529 }
2530 }
2531 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2532 bfd_link_pic (info),
2533 h)
2534 || (bfd_link_pic (info)
2535 && SYMBOL_REFERENCES_LOCAL (info, h))
2536 || (ELF_ST_VISIBILITY (h->other)
2537 && h->root.type == bfd_link_hash_undefweak))
2538
2539 {
2540 /* This is actually a static link, or it is a
2541 -Bsymbolic link and the symbol is defined
2542 locally, or the symbol was forced to be local
2543 because of a version file. We must initialize
2544 this entry in the global offset table. Since the
2545 offset must always be a multiple of 2, we use the
2546 least significant bit to record whether we have
2547 initialized it already.
2548
2549 When doing a dynamic link, we create a .rel.got
2550 relocation entry to initialize the value. This
2551 is done in the finish_dynamic_symbol routine. */
2552 if ((off & 1) != 0)
2553 off &= ~1;
2554 else
2555 {
2556 bfd_put_32 (output_bfd, relocation,
2557 base_got->contents + off);
2558 h->got.offset |= 1;
2559 }
2560
2561 if ((h->def_regular
2562 && bfd_link_pic (info)
2563 && SYMBOL_REFERENCES_LOCAL (info, h))
2564 /* lrl rx,sym@GOTENT -> larl rx, sym */
2565 && ((r_type == R_390_GOTENT
2566 && (bfd_get_16 (input_bfd,
2567 contents + rel->r_offset - 2)
2568 & 0xff0f) == 0xc40d)
2569 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2570 || (r_type == R_390_GOT20
2571 && (bfd_get_32 (input_bfd,
2572 contents + rel->r_offset - 2)
2573 & 0xff00f000) == 0xe300c000
2574 && bfd_get_8 (input_bfd,
2575 contents + rel->r_offset + 3) == 0x58)))
2576 {
2577 unsigned short new_insn =
2578 (0xc000 | (bfd_get_8 (input_bfd,
2579 contents + rel->r_offset - 1) & 0xf0));
2580 bfd_put_16 (output_bfd, new_insn,
2581 contents + rel->r_offset - 2);
2582 r_type = R_390_PC32DBL;
2583 rel->r_addend = 2;
2584 howto = elf_howto_table + r_type;
2585 relocation = h->root.u.def.value
2586 + h->root.u.def.section->output_section->vma
2587 + h->root.u.def.section->output_offset;
2588 goto do_relocation;
2589 }
2590 }
2591 else
2592 unresolved_reloc = FALSE;
2593 }
2594 else
2595 {
2596 if (local_got_offsets == NULL)
2597 abort ();
2598
2599 off = local_got_offsets[r_symndx];
2600
2601 /* The offset must always be a multiple of 4. We use
2602 the least significant bit to record whether we have
2603 already generated the necessary reloc. */
2604 if ((off & 1) != 0)
2605 off &= ~1;
2606 else
2607 {
2608 bfd_put_32 (output_bfd, relocation,
2609 htab->elf.sgot->contents + off);
2610
2611 if (bfd_link_pic (info))
2612 {
2613 asection *srelgot;
2614 Elf_Internal_Rela outrel;
2615 bfd_byte *loc;
2616
2617 srelgot = htab->elf.srelgot;
2618 if (srelgot == NULL)
2619 abort ();
2620
2621 outrel.r_offset = (htab->elf.sgot->output_section->vma
2622 + htab->elf.sgot->output_offset
2623 + off);
2624 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2625 outrel.r_addend = relocation;
2626 loc = srelgot->contents;
2627 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2628 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2629 }
2630
2631 local_got_offsets[r_symndx] |= 1;
2632 }
2633 }
2634
2635 if (off >= (bfd_vma) -2)
2636 abort ();
2637
2638 relocation = base_got->output_offset + off;
2639
2640 /* For @GOTENT the relocation is against the offset between
2641 the instruction and the symbols entry in the GOT and not
2642 between the start of the GOT and the symbols entry. We
2643 add the vma of the GOT to get the correct value. */
2644 if ( r_type == R_390_GOTENT
2645 || r_type == R_390_GOTPLTENT)
2646 relocation += base_got->output_section->vma;
2647
2648 break;
2649
2650 case R_390_GOTOFF16:
2651 case R_390_GOTOFF32:
2652 /* Relocation is relative to the start of the global offset
2653 table. */
2654
2655 if (h != NULL
2656 && s390_is_ifunc_symbol_p (h)
2657 && h->def_regular
2658 && !bfd_link_executable (info))
2659 {
2660 relocation = (htab->elf.iplt->output_section->vma
2661 + htab->elf.iplt->output_offset
2662 + h->plt.offset
2663 - htab->elf.sgot->output_section->vma);
2664 goto do_relocation;
2665 }
2666
2667 /* Note that sgot->output_offset is not involved in this
2668 calculation. We always want the start of .got. If we
2669 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2670 permitted by the ABI, we might have to change this
2671 calculation. */
2672 relocation -= htab->elf.sgot->output_section->vma;
2673 break;
2674
2675 case R_390_GOTPC:
2676 case R_390_GOTPCDBL:
2677 /* Use global offset table as symbol value. */
2678 relocation = htab->elf.sgot->output_section->vma;
2679 unresolved_reloc = FALSE;
2680 break;
2681
2682 case R_390_PLT12DBL:
2683 case R_390_PLT16DBL:
2684 case R_390_PLT24DBL:
2685 case R_390_PLT32DBL:
2686 case R_390_PLT32:
2687 /* Relocation is to the entry for this symbol in the
2688 procedure linkage table. */
2689
2690 /* Resolve a PLT32 reloc against a local symbol directly,
2691 without using the procedure linkage table. */
2692 if (h == NULL)
2693 break;
2694
2695 if (h->plt.offset == (bfd_vma) -1
2696 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2697 {
2698 /* We didn't make a PLT entry for this symbol. This
2699 happens when statically linking PIC code, or when
2700 using -Bsymbolic. */
2701 break;
2702 }
2703
2704 if (s390_is_ifunc_symbol_p (h))
2705 relocation = (htab->elf.iplt->output_section->vma
2706 + htab->elf.iplt->output_offset
2707 + h->plt.offset);
2708 else
2709 relocation = (htab->elf.splt->output_section->vma
2710 + htab->elf.splt->output_offset
2711 + h->plt.offset);
2712 unresolved_reloc = FALSE;
2713 break;
2714
2715 case R_390_PLTOFF16:
2716 case R_390_PLTOFF32:
2717 /* Relocation is to the entry for this symbol in the
2718 procedure linkage table relative to the start of the GOT. */
2719
2720 /* For local symbols or if we didn't make a PLT entry for
2721 this symbol resolve the symbol directly. */
2722 if (h == NULL
2723 || h->plt.offset == (bfd_vma) -1
2724 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2725 {
2726 relocation -= htab->elf.sgot->output_section->vma;
2727 break;
2728 }
2729
2730 if (s390_is_ifunc_symbol_p (h))
2731 relocation = (htab->elf.iplt->output_section->vma
2732 + htab->elf.iplt->output_offset
2733 + h->plt.offset
2734 - htab->elf.sgot->output_section->vma);
2735 else
2736 relocation = (htab->elf.splt->output_section->vma
2737 + htab->elf.splt->output_offset
2738 + h->plt.offset
2739 - htab->elf.sgot->output_section->vma);
2740 unresolved_reloc = FALSE;
2741 break;
2742
2743 case R_390_PC16:
2744 case R_390_PC12DBL:
2745 case R_390_PC16DBL:
2746 case R_390_PC24DBL:
2747 case R_390_PC32DBL:
2748 case R_390_PC32:
2749 if (h != NULL
2750 && s390_is_ifunc_symbol_p (h)
2751 && h->def_regular
2752 && !bfd_link_executable (info))
2753 {
2754 /* This will not work our if the function does not
2755 happen to set up the GOT pointer for some other
2756 reason. 31 bit PLT entries require r12 to hold the
2757 GOT pointer.
2758 FIXME: Implement an errorcheck.
2759 NOTE: It will work when brasl is not available
2760 (e.g. with -m31 -march=g5) since a local function
2761 call then does use GOTOFF which implies r12 being set
2762 up. */
2763 relocation = (htab->elf.iplt->output_section->vma
2764 + htab->elf.iplt->output_offset
2765 + h ->plt.offset);
2766 goto do_relocation;
2767 }
2768 /* Fall through. */
2769
2770 case R_390_8:
2771 case R_390_16:
2772 case R_390_32:
2773 if (h != NULL
2774 && s390_is_ifunc_symbol_p (h)
2775 && h->def_regular)
2776 {
2777 if (!bfd_link_pic (info) || !h->non_got_ref)
2778 {
2779 /* For a non-shared object STT_GNU_IFUNC symbol must
2780 go through PLT. */
2781 relocation = (htab->elf.iplt->output_section->vma
2782 + htab->elf.iplt->output_offset
2783 + h ->plt.offset);
2784 goto do_relocation;
2785 }
2786 else
2787 {
2788 /* For shared objects a runtime relocation is needed. */
2789
2790 Elf_Internal_Rela outrel;
2791 asection *sreloc;
2792
2793 /* Need a dynamic relocation to get the real function
2794 address. */
2795 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2796 info,
2797 input_section,
2798 rel->r_offset);
2799 if (outrel.r_offset == (bfd_vma) -1
2800 || outrel.r_offset == (bfd_vma) -2)
2801 abort ();
2802
2803 outrel.r_offset += (input_section->output_section->vma
2804 + input_section->output_offset);
2805
2806 if (h->dynindx == -1
2807 || h->forced_local
2808 || bfd_link_executable (info))
2809 {
2810 /* This symbol is resolved locally. */
2811 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2812 outrel.r_addend = (h->root.u.def.value
2813 + h->root.u.def.section->output_section->vma
2814 + h->root.u.def.section->output_offset);
2815 }
2816 else
2817 {
2818 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2819 outrel.r_addend = 0;
2820 }
2821
2822 sreloc = htab->elf.irelifunc;
2823 elf_append_rela (output_bfd, sreloc, &outrel);
2824
2825 /* If this reloc is against an external symbol, we
2826 do not want to fiddle with the addend. Otherwise,
2827 we need to include the symbol value so that it
2828 becomes an addend for the dynamic reloc. For an
2829 internal symbol, we have updated addend. */
2830 continue;
2831 }
2832 }
2833
2834 if ((input_section->flags & SEC_ALLOC) == 0)
2835 break;
2836
2837 if ((bfd_link_pic (info)
2838 && (h == NULL
2839 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2840 || h->root.type != bfd_link_hash_undefweak)
2841 && ((r_type != R_390_PC16
2842 && r_type != R_390_PC12DBL
2843 && r_type != R_390_PC16DBL
2844 && r_type != R_390_PC24DBL
2845 && r_type != R_390_PC32DBL
2846 && r_type != R_390_PC32)
2847 || !SYMBOL_CALLS_LOCAL (info, h)))
2848 || (ELIMINATE_COPY_RELOCS
2849 && !bfd_link_pic (info)
2850 && h != NULL
2851 && h->dynindx != -1
2852 && !h->non_got_ref
2853 && ((h->def_dynamic
2854 && !h->def_regular)
2855 || h->root.type == bfd_link_hash_undefweak
2856 || h->root.type == bfd_link_hash_undefined)))
2857 {
2858 Elf_Internal_Rela outrel;
2859 bfd_boolean skip, relocate;
2860 asection *sreloc;
2861 bfd_byte *loc;
2862
2863 /* When generating a shared object, these relocations
2864 are copied into the output file to be resolved at run
2865 time. */
2866
2867 skip = FALSE;
2868 relocate = FALSE;
2869
2870 outrel.r_offset =
2871 _bfd_elf_section_offset (output_bfd, info, input_section,
2872 rel->r_offset);
2873 if (outrel.r_offset == (bfd_vma) -1)
2874 skip = TRUE;
2875 else if (outrel.r_offset == (bfd_vma) -2)
2876 skip = TRUE, relocate = TRUE;
2877 outrel.r_offset += (input_section->output_section->vma
2878 + input_section->output_offset);
2879
2880 if (skip)
2881 memset (&outrel, 0, sizeof outrel);
2882 else if (h != NULL
2883 && h->dynindx != -1
2884 && (r_type == R_390_PC16
2885 || r_type == R_390_PC12DBL
2886 || r_type == R_390_PC16DBL
2887 || r_type == R_390_PC24DBL
2888 || r_type == R_390_PC32DBL
2889 || r_type == R_390_PC32
2890 || !bfd_link_pic (info)
2891 || !SYMBOLIC_BIND (info, h)
2892 || !h->def_regular))
2893 {
2894 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2895 outrel.r_addend = rel->r_addend;
2896 }
2897 else
2898 {
2899 /* This symbol is local, or marked to become local. */
2900 outrel.r_addend = relocation + rel->r_addend;
2901 if (r_type == R_390_32)
2902 {
2903 relocate = TRUE;
2904 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2905 }
2906 else
2907 {
2908 long sindx;
2909
2910 if (bfd_is_abs_section (sec))
2911 sindx = 0;
2912 else if (sec == NULL || sec->owner == NULL)
2913 {
2914 bfd_set_error(bfd_error_bad_value);
2915 return FALSE;
2916 }
2917 else
2918 {
2919 asection *osec;
2920
2921 osec = sec->output_section;
2922 sindx = elf_section_data (osec)->dynindx;
2923 if (sindx == 0)
2924 {
2925 osec = htab->elf.text_index_section;
2926 sindx = elf_section_data (osec)->dynindx;
2927 }
2928 BFD_ASSERT (sindx != 0);
2929
2930 /* We are turning this relocation into one
2931 against a section symbol, so subtract out
2932 the output section's address but not the
2933 offset of the input section in the output
2934 section. */
2935 outrel.r_addend -= osec->vma;
2936 }
2937 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2938 }
2939 }
2940
2941 sreloc = elf_section_data (input_section)->sreloc;
2942 if (sreloc == NULL)
2943 abort ();
2944
2945 loc = sreloc->contents;
2946 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2947 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2948
2949 /* If this reloc is against an external symbol, we do
2950 not want to fiddle with the addend. Otherwise, we
2951 need to include the symbol value so that it becomes
2952 an addend for the dynamic reloc. */
2953 if (! relocate)
2954 continue;
2955 }
2956 break;
2957
2958 /* Relocations for tls literal pool entries. */
2959 case R_390_TLS_IE32:
2960 if (bfd_link_pic (info))
2961 {
2962 Elf_Internal_Rela outrel;
2963 asection *sreloc;
2964 bfd_byte *loc;
2965
2966 outrel.r_offset = rel->r_offset
2967 + input_section->output_section->vma
2968 + input_section->output_offset;
2969 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2970 sreloc = elf_section_data (input_section)->sreloc;
2971 if (sreloc == NULL)
2972 abort ();
2973 loc = sreloc->contents;
2974 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2975 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2976 }
2977 /* Fall through. */
2978
2979 case R_390_TLS_GD32:
2980 case R_390_TLS_GOTIE32:
2981 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2982 tls_type = GOT_UNKNOWN;
2983 if (h == NULL && local_got_offsets)
2984 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2985 else if (h != NULL)
2986 {
2987 tls_type = elf_s390_hash_entry(h)->tls_type;
2988 if (!bfd_link_pic (info)
2989 && h->dynindx == -1
2990 && tls_type >= GOT_TLS_IE)
2991 r_type = R_390_TLS_LE32;
2992 }
2993 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2994 r_type = R_390_TLS_IE32;
2995
2996 if (r_type == R_390_TLS_LE32)
2997 {
2998 /* This relocation gets optimized away by the local exec
2999 access optimization. */
3000 BFD_ASSERT (! unresolved_reloc);
3001 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3002 contents + rel->r_offset);
3003 continue;
3004 }
3005
3006 if (htab->elf.sgot == NULL)
3007 abort ();
3008
3009 if (h != NULL)
3010 off = h->got.offset;
3011 else
3012 {
3013 if (local_got_offsets == NULL)
3014 abort ();
3015
3016 off = local_got_offsets[r_symndx];
3017 }
3018
3019 emit_tls_relocs:
3020
3021 if ((off & 1) != 0)
3022 off &= ~1;
3023 else
3024 {
3025 Elf_Internal_Rela outrel;
3026 bfd_byte *loc;
3027 int dr_type, indx;
3028
3029 if (htab->elf.srelgot == NULL)
3030 abort ();
3031
3032 outrel.r_offset = (htab->elf.sgot->output_section->vma
3033 + htab->elf.sgot->output_offset + off);
3034
3035 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3036 if (r_type == R_390_TLS_GD32)
3037 dr_type = R_390_TLS_DTPMOD;
3038 else
3039 dr_type = R_390_TLS_TPOFF;
3040 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3041 outrel.r_addend = relocation - dtpoff_base (info);
3042 else
3043 outrel.r_addend = 0;
3044 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3045 loc = htab->elf.srelgot->contents;
3046 loc += htab->elf.srelgot->reloc_count++
3047 * sizeof (Elf32_External_Rela);
3048 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3049
3050 if (r_type == R_390_TLS_GD32)
3051 {
3052 if (indx == 0)
3053 {
3054 BFD_ASSERT (! unresolved_reloc);
3055 bfd_put_32 (output_bfd,
3056 relocation - dtpoff_base (info),
3057 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3058 }
3059 else
3060 {
3061 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3062 outrel.r_offset += GOT_ENTRY_SIZE;
3063 outrel.r_addend = 0;
3064 htab->elf.srelgot->reloc_count++;
3065 loc += sizeof (Elf32_External_Rela);
3066 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3067 }
3068 }
3069
3070 if (h != NULL)
3071 h->got.offset |= 1;
3072 else
3073 local_got_offsets[r_symndx] |= 1;
3074 }
3075
3076 if (off >= (bfd_vma) -2)
3077 abort ();
3078 if (r_type == ELF32_R_TYPE (rel->r_info))
3079 {
3080 relocation = htab->elf.sgot->output_offset + off;
3081 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3082 relocation += htab->elf.sgot->output_section->vma;
3083 unresolved_reloc = FALSE;
3084 }
3085 else
3086 {
3087 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3088 contents + rel->r_offset);
3089 continue;
3090 }
3091 break;
3092
3093 case R_390_TLS_GOTIE12:
3094 case R_390_TLS_GOTIE20:
3095 case R_390_TLS_IEENT:
3096 if (h == NULL)
3097 {
3098 if (local_got_offsets == NULL)
3099 abort();
3100 off = local_got_offsets[r_symndx];
3101 if (bfd_link_pic (info))
3102 goto emit_tls_relocs;
3103 }
3104 else
3105 {
3106 off = h->got.offset;
3107 tls_type = elf_s390_hash_entry(h)->tls_type;
3108 if (bfd_link_pic (info)
3109 || h->dynindx != -1
3110 || tls_type < GOT_TLS_IE)
3111 goto emit_tls_relocs;
3112 }
3113
3114 if (htab->elf.sgot == NULL)
3115 abort ();
3116
3117 BFD_ASSERT (! unresolved_reloc);
3118 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3119 htab->elf.sgot->contents + off);
3120 relocation = htab->elf.sgot->output_offset + off;
3121 if (r_type == R_390_TLS_IEENT)
3122 relocation += htab->elf.sgot->output_section->vma;
3123 unresolved_reloc = FALSE;
3124 break;
3125
3126 case R_390_TLS_LDM32:
3127 if (! bfd_link_pic (info))
3128 /* The literal pool entry this relocation refers to gets ignored
3129 by the optimized code of the local exec model. Do nothing
3130 and the value will turn out zero. */
3131 continue;
3132
3133 if (htab->elf.sgot == NULL)
3134 abort ();
3135
3136 off = htab->tls_ldm_got.offset;
3137 if (off & 1)
3138 off &= ~1;
3139 else
3140 {
3141 Elf_Internal_Rela outrel;
3142 bfd_byte *loc;
3143
3144 if (htab->elf.srelgot == NULL)
3145 abort ();
3146
3147 outrel.r_offset = (htab->elf.sgot->output_section->vma
3148 + htab->elf.sgot->output_offset + off);
3149
3150 bfd_put_32 (output_bfd, 0,
3151 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3152 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3153 outrel.r_addend = 0;
3154 loc = htab->elf.srelgot->contents;
3155 loc += htab->elf.srelgot->reloc_count++
3156 * sizeof (Elf32_External_Rela);
3157 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3158 htab->tls_ldm_got.offset |= 1;
3159 }
3160 relocation = htab->elf.sgot->output_offset + off;
3161 unresolved_reloc = FALSE;
3162 break;
3163
3164 case R_390_TLS_LE32:
3165 if (bfd_link_dll (info))
3166 {
3167 /* Linking a shared library with non-fpic code requires
3168 a R_390_TLS_TPOFF relocation. */
3169 Elf_Internal_Rela outrel;
3170 asection *sreloc;
3171 bfd_byte *loc;
3172 int indx;
3173
3174 outrel.r_offset = rel->r_offset
3175 + input_section->output_section->vma
3176 + input_section->output_offset;
3177 if (h != NULL && h->dynindx != -1)
3178 indx = h->dynindx;
3179 else
3180 indx = 0;
3181 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3182 if (indx == 0)
3183 outrel.r_addend = relocation - dtpoff_base (info);
3184 else
3185 outrel.r_addend = 0;
3186 sreloc = elf_section_data (input_section)->sreloc;
3187 if (sreloc == NULL)
3188 abort ();
3189 loc = sreloc->contents;
3190 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3191 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3192 }
3193 else
3194 {
3195 BFD_ASSERT (! unresolved_reloc);
3196 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3197 contents + rel->r_offset);
3198 }
3199 continue;
3200
3201 case R_390_TLS_LDO32:
3202 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3203 relocation -= dtpoff_base (info);
3204 else
3205 /* When converting LDO to LE, we must negate. */
3206 relocation = -tpoff (info, relocation);
3207 break;
3208
3209 /* Relocations for tls instructions. */
3210 case R_390_TLS_LOAD:
3211 case R_390_TLS_GDCALL:
3212 case R_390_TLS_LDCALL:
3213 tls_type = GOT_UNKNOWN;
3214 if (h == NULL && local_got_offsets)
3215 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3216 else if (h != NULL)
3217 tls_type = elf_s390_hash_entry(h)->tls_type;
3218
3219 if (tls_type == GOT_TLS_GD)
3220 continue;
3221
3222 if (r_type == R_390_TLS_LOAD)
3223 {
3224 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3225 {
3226 /* IE->LE transition. Four valid cases:
3227 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3228 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3229 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3230 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3231 unsigned int insn, ry;
3232
3233 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3234 ry = 0;
3235 if ((insn & 0xff00f000) == 0x58000000)
3236 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3237 ry = (insn & 0x000f0000);
3238 else if ((insn & 0xff0f0000) == 0x58000000)
3239 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3240 ry = (insn & 0x0000f000) << 4;
3241 else if ((insn & 0xff00f000) == 0x5800c000)
3242 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3243 ry = (insn & 0x000f0000);
3244 else if ((insn & 0xff0f0000) == 0x580c0000)
3245 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3246 ry = (insn & 0x0000f000) << 4;
3247 else
3248 invalid_tls_insn (input_bfd, input_section, rel);
3249 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3250 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3251 }
3252 }
3253 else if (r_type == R_390_TLS_GDCALL)
3254 {
3255 unsigned int insn;
3256
3257 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3258 if ((insn & 0xff000fff) != 0x4d000000 &&
3259 (insn & 0xffff0000) != 0xc0e50000 &&
3260 (insn & 0xff000000) != 0x0d000000)
3261 invalid_tls_insn (input_bfd, input_section, rel);
3262 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3263 {
3264 if ((insn & 0xff000000) == 0x0d000000)
3265 {
3266 /* GD->LE transition.
3267 basr rx, ry -> nopr r7 */
3268 insn = 0x07070000 | (insn & 0xffff);
3269 }
3270 else if ((insn & 0xff000000) == 0x4d000000)
3271 {
3272 /* GD->LE transition.
3273 bas %r14,0(%rx,%r13) -> bc 0,0 */
3274 insn = 0x47000000;
3275 }
3276 else
3277 {
3278 /* GD->LE transition.
3279 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3280 insn = 0xc0040000;
3281 bfd_put_16 (output_bfd, 0x0000,
3282 contents + rel->r_offset + 4);
3283 }
3284 }
3285 else
3286 {
3287 /* If basr is used in the pic case to invoke
3288 _tls_get_offset, something went wrong before. */
3289 if ((insn & 0xff000000) == 0x0d000000)
3290 invalid_tls_insn (input_bfd, input_section, rel);
3291
3292 if ((insn & 0xff000000) == 0x4d000000)
3293 {
3294 /* GD->IE transition.
3295 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3296 insn = 0x5822c000;
3297 }
3298 else
3299 {
3300 /* GD->IE transition.
3301 brasl %r14,__tls_get_addr@plt ->
3302 l %r2,0(%r2,%r12) ; bcr 0,0 */
3303 insn = 0x5822c000;
3304 bfd_put_16 (output_bfd, 0x0700,
3305 contents + rel->r_offset + 4);
3306 }
3307 }
3308 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3309 }
3310 else if (r_type == R_390_TLS_LDCALL)
3311 {
3312 if (!bfd_link_pic (info))
3313 {
3314 unsigned int insn;
3315
3316 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3317 if ((insn & 0xff000fff) != 0x4d000000 &&
3318 (insn & 0xffff0000) != 0xc0e50000 &&
3319 (insn & 0xff000000) != 0x0d000000)
3320 invalid_tls_insn (input_bfd, input_section, rel);
3321
3322 if ((insn & 0xff000000) == 0x0d000000)
3323 {
3324 /* LD->LE transition.
3325 basr rx, ry -> nopr r7 */
3326 insn = 0x07070000 | (insn & 0xffff);
3327 }
3328 else if ((insn & 0xff000000) == 0x4d000000)
3329 {
3330 /* LD->LE transition.
3331 bas %r14,0(%rx,%r13) -> bc 0,0 */
3332 insn = 0x47000000;
3333 }
3334 else
3335 {
3336 /* LD->LE transition.
3337 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3338 insn = 0xc0040000;
3339 bfd_put_16 (output_bfd, 0x0000,
3340 contents + rel->r_offset + 4);
3341 }
3342 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3343 }
3344 }
3345 continue;
3346
3347 default:
3348 break;
3349 }
3350
3351 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3352 because such sections are not SEC_ALLOC and thus ld.so will
3353 not process them. */
3354 if (unresolved_reloc
3355 && !((input_section->flags & SEC_DEBUGGING) != 0
3356 && h->def_dynamic)
3357 && _bfd_elf_section_offset (output_bfd, info, input_section,
3358 rel->r_offset) != (bfd_vma) -1)
3359 _bfd_error_handler
3360 /* xgettext:c-format */
3361 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3362 input_bfd,
3363 input_section,
3364 (long) rel->r_offset,
3365 howto->name,
3366 h->root.root.string);
3367
3368 do_relocation:
3369
3370 /* When applying a 24 bit reloc we need to start one byte
3371 earlier. Otherwise the 32 bit get/put bfd operations might
3372 access a byte after the actual section. */
3373 if (r_type == R_390_PC24DBL
3374 || r_type == R_390_PLT24DBL)
3375 rel->r_offset--;
3376
3377 if (r_type == R_390_20
3378 || r_type == R_390_GOT20
3379 || r_type == R_390_GOTPLT20
3380 || r_type == R_390_TLS_GOTIE20)
3381 {
3382 relocation += rel->r_addend;
3383 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3384 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3385 contents, rel->r_offset,
3386 relocation, 0);
3387 }
3388 else
3389 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3390 contents, rel->r_offset,
3391 relocation, rel->r_addend);
3392
3393 if (r != bfd_reloc_ok)
3394 {
3395 const char *name;
3396
3397 if (h != NULL)
3398 name = h->root.root.string;
3399 else
3400 {
3401 name = bfd_elf_string_from_elf_section (input_bfd,
3402 symtab_hdr->sh_link,
3403 sym->st_name);
3404 if (name == NULL)
3405 return FALSE;
3406 if (*name == '\0')
3407 name = bfd_section_name (input_bfd, sec);
3408 }
3409
3410 if (r == bfd_reloc_overflow)
3411 (*info->callbacks->reloc_overflow)
3412 (info, (h ? &h->root : NULL), name, howto->name,
3413 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3414 else
3415 {
3416 _bfd_error_handler
3417 /* xgettext:c-format */
3418 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3419 input_bfd, input_section,
3420 (long) rel->r_offset, name, (int) r);
3421 return FALSE;
3422 }
3423 }
3424 }
3425
3426 return TRUE;
3427 }
3428
3429 /* Generate the PLT slots together with the dynamic relocations needed
3430 for IFUNC symbols. */
3431
3432 static void
3433 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3434 struct bfd_link_info *info,
3435 struct elf_link_hash_entry *h,
3436 struct elf_s390_link_hash_table *htab,
3437 bfd_vma iplt_offset,
3438 bfd_vma resolver_address)
3439 {
3440 bfd_vma iplt_index;
3441 bfd_vma got_offset;
3442 bfd_vma igotiplt_offset;
3443 Elf_Internal_Rela rela;
3444 bfd_byte *loc;
3445 asection *plt, *gotplt, *relplt;
3446 bfd_vma relative_offset;
3447
3448 if (htab->elf.iplt == NULL
3449 || htab->elf.igotplt == NULL
3450 || htab->elf.irelplt == NULL)
3451 abort ();
3452
3453 gotplt = htab->elf.igotplt;
3454 relplt = htab->elf.irelplt;
3455
3456 /* Index of the PLT slot within iplt section. */
3457 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3458 plt = htab->elf.iplt;
3459 /* Offset into the igot.plt section. */
3460 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3461 /* Offset into the got section. */
3462 got_offset = igotiplt_offset + gotplt->output_offset;
3463
3464 /* S390 uses halfwords for relative branch calc! */
3465 relative_offset = - (plt->output_offset +
3466 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3467 /* If offset is > 32768, branch to a previous branch
3468 390 can only handle +-64 K jumps. */
3469 if ( -32768 > (int) relative_offset )
3470 relative_offset
3471 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3472
3473 /* Fill in the entry in the procedure linkage table. */
3474 if (!bfd_link_pic (info))
3475 {
3476 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3477 PLT_ENTRY_SIZE);
3478
3479 /* Adjust jump to the first plt entry. */
3480 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3481 plt->contents + iplt_offset + 20);
3482
3483 /* Push the GOT offset field. */
3484 bfd_put_32 (output_bfd,
3485 (gotplt->output_section->vma
3486 + got_offset),
3487 plt->contents + iplt_offset + 24);
3488 }
3489 else if (got_offset < 4096)
3490 {
3491 /* The GOT offset is small enough to be used directly as
3492 displacement. */
3493 memcpy (plt->contents + iplt_offset,
3494 elf_s390_plt_pic12_entry,
3495 PLT_ENTRY_SIZE);
3496
3497 /* Put in the GOT offset as displacement value. The 0xc000
3498 value comes from the first word of the plt entry. Look
3499 at the elf_s390_plt_pic16_entry content. */
3500 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3501 plt->contents + iplt_offset + 2);
3502
3503 /* Adjust the jump to the first plt entry. */
3504 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3505 plt->contents + iplt_offset + 20);
3506 }
3507 else if (got_offset < 32768)
3508 {
3509 /* The GOT offset is too big for a displacement but small
3510 enough to be a signed 16 bit immediate value as it can be
3511 used in an lhi instruction. */
3512 memcpy (plt->contents + iplt_offset,
3513 elf_s390_plt_pic16_entry,
3514 PLT_ENTRY_SIZE);
3515
3516 /* Put in the GOT offset for the lhi instruction. */
3517 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3518 plt->contents + iplt_offset + 2);
3519
3520 /* Adjust the jump to the first plt entry. */
3521 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3522 plt->contents + iplt_offset + 20);
3523 }
3524 else
3525 {
3526 memcpy (plt->contents + iplt_offset,
3527 elf_s390_plt_pic_entry,
3528 PLT_ENTRY_SIZE);
3529
3530 /* Adjust the jump to the first plt entry. */
3531 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3532 plt->contents + iplt_offset + 20);
3533
3534 /* Push the GOT offset field. */
3535 bfd_put_32 (output_bfd, got_offset,
3536 plt->contents + iplt_offset + 24);
3537 }
3538 /* Insert offset into reloc. table here. */
3539 bfd_put_32 (output_bfd, relplt->output_offset +
3540 iplt_index * RELA_ENTRY_SIZE,
3541 plt->contents + iplt_offset + 28);
3542
3543 /* Fill in the entry in the global offset table.
3544 Points to instruction after GOT offset. */
3545 bfd_put_32 (output_bfd,
3546 (plt->output_section->vma
3547 + plt->output_offset
3548 + iplt_offset
3549 + 12),
3550 gotplt->contents + igotiplt_offset);
3551
3552 /* Fill in the entry in the .rela.plt section. */
3553 rela.r_offset = gotplt->output_section->vma + got_offset;
3554
3555 if (!h
3556 || h->dynindx == -1
3557 || ((bfd_link_executable (info)
3558 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3559 && h->def_regular))
3560 {
3561 /* The symbol can be locally resolved. */
3562 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3563 rela.r_addend = resolver_address;
3564 }
3565 else
3566 {
3567 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3568 rela.r_addend = 0;
3569 }
3570
3571 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3572 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3573 }
3574
3575 /* Finish up dynamic symbol handling. We set the contents of various
3576 dynamic sections here. */
3577
3578 static bfd_boolean
3579 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3580 struct bfd_link_info *info,
3581 struct elf_link_hash_entry *h,
3582 Elf_Internal_Sym *sym)
3583 {
3584 struct elf_s390_link_hash_table *htab;
3585 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3586
3587 htab = elf_s390_hash_table (info);
3588
3589 if (h->plt.offset != (bfd_vma) -1)
3590 {
3591 bfd_vma plt_index;
3592 bfd_vma got_offset;
3593 Elf_Internal_Rela rela;
3594 bfd_byte *loc;
3595 bfd_vma relative_offset;
3596
3597 /* This symbol has an entry in the procedure linkage table. Set
3598 it up. */
3599 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3600 {
3601 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3602 htab, h->plt.offset,
3603 eh->ifunc_resolver_address +
3604 eh->ifunc_resolver_section->output_offset +
3605 eh->ifunc_resolver_section->output_section->vma);
3606 /* Do not return yet. Handling of explicit GOT slots of
3607 IFUNC symbols is below. */
3608 }
3609 else
3610 {
3611 if (h->dynindx == -1
3612 || htab->elf.splt == NULL
3613 || htab->elf.sgotplt == NULL
3614 || htab->elf.srelplt == NULL)
3615 abort ();
3616
3617 /* Calc. index no.
3618 Current offset - size first entry / entry size. */
3619 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3620
3621 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3622 addr & GOT addr. */
3623 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3624
3625 /* S390 uses halfwords for relative branch calc! */
3626 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3627 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3628 /* If offset is > 32768, branch to a previous branch
3629 390 can only handle +-64 K jumps. */
3630 if ( -32768 > (int) relative_offset )
3631 relative_offset
3632 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3633
3634 /* Fill in the entry in the procedure linkage table. */
3635 if (!bfd_link_pic (info))
3636 {
3637 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3638 PLT_ENTRY_SIZE);
3639
3640 /* Adjust jump to the first plt entry. */
3641 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3642 htab->elf.splt->contents + h->plt.offset + 20);
3643
3644 /* Push the GOT offset field. */
3645 bfd_put_32 (output_bfd,
3646 (htab->elf.sgotplt->output_section->vma
3647 + htab->elf.sgotplt->output_offset
3648 + got_offset),
3649 htab->elf.splt->contents + h->plt.offset + 24);
3650 }
3651 else if (got_offset < 4096)
3652 {
3653 /* The GOT offset is small enough to be used directly as
3654 displacement. */
3655 memcpy (htab->elf.splt->contents + h->plt.offset,
3656 elf_s390_plt_pic12_entry,
3657 PLT_ENTRY_SIZE);
3658
3659 /* Put in the GOT offset as displacement value. The 0xc000
3660 value comes from the first word of the plt entry. Look
3661 at the elf_s390_plt_pic12_entry content. */
3662 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3663 htab->elf.splt->contents + h->plt.offset + 2);
3664
3665 /* Adjust the jump to the first plt entry. */
3666 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3667 htab->elf.splt->contents + h->plt.offset + 20);
3668 }
3669 else if (got_offset < 32768)
3670 {
3671 /* The GOT offset is too big for a displacement but small
3672 enough to be a signed 16 bit immediate value as it can be
3673 used in an lhi instruction. */
3674 memcpy (htab->elf.splt->contents + h->plt.offset,
3675 elf_s390_plt_pic16_entry,
3676 PLT_ENTRY_SIZE);
3677
3678 /* Put in the GOT offset for the lhi instruction. */
3679 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3680 htab->elf.splt->contents + h->plt.offset + 2);
3681
3682 /* Adjust the jump to the first plt entry. */
3683 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3684 htab->elf.splt->contents + h->plt.offset + 20);
3685 }
3686 else
3687 {
3688 memcpy (htab->elf.splt->contents + h->plt.offset,
3689 elf_s390_plt_pic_entry,
3690 PLT_ENTRY_SIZE);
3691
3692 /* Adjust the jump to the first plt entry. */
3693 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3694 htab->elf.splt->contents + h->plt.offset + 20);
3695
3696 /* Push the GOT offset field. */
3697 bfd_put_32 (output_bfd, got_offset,
3698 htab->elf.splt->contents + h->plt.offset + 24);
3699 }
3700 /* Insert offset into reloc. table here. */
3701 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3702 htab->elf.splt->contents + h->plt.offset + 28);
3703
3704 /* Fill in the entry in the global offset table.
3705 Points to instruction after GOT offset. */
3706 bfd_put_32 (output_bfd,
3707 (htab->elf.splt->output_section->vma
3708 + htab->elf.splt->output_offset
3709 + h->plt.offset
3710 + 12),
3711 htab->elf.sgotplt->contents + got_offset);
3712
3713 /* Fill in the entry in the .rela.plt section. */
3714 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3715 + htab->elf.sgotplt->output_offset
3716 + got_offset);
3717 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3718 rela.r_addend = 0;
3719 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3720 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3721
3722 if (!h->def_regular)
3723 {
3724 /* Mark the symbol as undefined, rather than as defined in
3725 the .plt section. Leave the value alone. This is a clue
3726 for the dynamic linker, to make function pointer
3727 comparisons work between an application and shared
3728 library. */
3729 sym->st_shndx = SHN_UNDEF;
3730 }
3731 }
3732 }
3733
3734 if (h->got.offset != (bfd_vma) -1
3735 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3736 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3737 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3738 {
3739 Elf_Internal_Rela rela;
3740 bfd_byte *loc;
3741
3742 /* This symbol has an entry in the global offset table. Set it
3743 up. */
3744
3745 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3746 abort ();
3747
3748 rela.r_offset = (htab->elf.sgot->output_section->vma
3749 + htab->elf.sgot->output_offset
3750 + (h->got.offset &~ (bfd_vma) 1));
3751
3752 /* If this is a static link, or it is a -Bsymbolic link and the
3753 symbol is defined locally or was forced to be local because
3754 of a version file, we just want to emit a RELATIVE reloc.
3755 The entry in the global offset table will already have been
3756 initialized in the relocate_section function. */
3757 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3758 {
3759 if (bfd_link_pic (info))
3760 {
3761 /* An explicit GOT slot usage needs GLOB_DAT. If the
3762 symbol references local the implicit got.iplt slot
3763 will be used and the IRELATIVE reloc has been created
3764 above. */
3765 goto do_glob_dat;
3766 }
3767 else
3768 {
3769 /* For non-shared objects explicit GOT slots must be
3770 filled with the PLT slot address for pointer
3771 equality reasons. */
3772 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3773 + htab->elf.iplt->output_offset
3774 + h->plt.offset),
3775 htab->elf.sgot->contents + h->got.offset);
3776 return TRUE;
3777 }
3778 }
3779 else if (bfd_link_pic (info)
3780 && SYMBOL_REFERENCES_LOCAL (info, h))
3781 {
3782 /* If this is a static link, or it is a -Bsymbolic link and
3783 the symbol is defined locally or was forced to be local
3784 because of a version file, we just want to emit a
3785 RELATIVE reloc. The entry in the global offset table
3786 will already have been initialized in the
3787 relocate_section function. */
3788 if (!h->def_regular)
3789 return FALSE;
3790 BFD_ASSERT((h->got.offset & 1) != 0);
3791 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3792 rela.r_addend = (h->root.u.def.value
3793 + h->root.u.def.section->output_section->vma
3794 + h->root.u.def.section->output_offset);
3795 }
3796 else
3797 {
3798 BFD_ASSERT((h->got.offset & 1) == 0);
3799 do_glob_dat:
3800 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3801 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3802 rela.r_addend = 0;
3803 }
3804
3805 loc = htab->elf.srelgot->contents;
3806 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3807 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3808 }
3809
3810 if (h->needs_copy)
3811 {
3812 Elf_Internal_Rela rela;
3813 asection *s;
3814 bfd_byte *loc;
3815
3816 /* This symbols needs a copy reloc. Set it up. */
3817
3818 if (h->dynindx == -1
3819 || (h->root.type != bfd_link_hash_defined
3820 && h->root.type != bfd_link_hash_defweak)
3821 || htab->elf.srelbss == NULL
3822 || htab->elf.sreldynrelro == NULL)
3823 abort ();
3824
3825 rela.r_offset = (h->root.u.def.value
3826 + h->root.u.def.section->output_section->vma
3827 + h->root.u.def.section->output_offset);
3828 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3829 rela.r_addend = 0;
3830 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
3831 s = htab->elf.sreldynrelro;
3832 else
3833 s = htab->elf.srelbss;
3834 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3835 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3836 }
3837
3838 /* Mark some specially defined symbols as absolute. */
3839 if (h == htab->elf.hdynamic
3840 || h == htab->elf.hgot
3841 || h == htab->elf.hplt)
3842 sym->st_shndx = SHN_ABS;
3843
3844 return TRUE;
3845 }
3846
3847 /* Used to decide how to sort relocs in an optimal manner for the
3848 dynamic linker, before writing them out. */
3849
3850 static enum elf_reloc_type_class
3851 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3852 const asection *rel_sec ATTRIBUTE_UNUSED,
3853 const Elf_Internal_Rela *rela)
3854 {
3855 bfd *abfd = info->output_bfd;
3856 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3857 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3858 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3859 Elf_Internal_Sym sym;
3860
3861 if (htab->elf.dynsym == NULL
3862 || !bed->s->swap_symbol_in (abfd,
3863 (htab->elf.dynsym->contents
3864 + r_symndx * bed->s->sizeof_sym),
3865 0, &sym))
3866 abort ();
3867
3868 /* Check relocation against STT_GNU_IFUNC symbol. */
3869 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3870 return reloc_class_ifunc;
3871
3872 switch ((int) ELF32_R_TYPE (rela->r_info))
3873 {
3874 case R_390_RELATIVE:
3875 return reloc_class_relative;
3876 case R_390_JMP_SLOT:
3877 return reloc_class_plt;
3878 case R_390_COPY:
3879 return reloc_class_copy;
3880 default:
3881 return reloc_class_normal;
3882 }
3883 }
3884
3885 /* Finish up the dynamic sections. */
3886
3887 static bfd_boolean
3888 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3889 struct bfd_link_info *info)
3890 {
3891 struct elf_s390_link_hash_table *htab;
3892 bfd *dynobj;
3893 asection *sdyn;
3894 bfd *ibfd;
3895 unsigned int i;
3896
3897 htab = elf_s390_hash_table (info);
3898 dynobj = htab->elf.dynobj;
3899 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3900
3901 if (htab->elf.dynamic_sections_created)
3902 {
3903 Elf32_External_Dyn *dyncon, *dynconend;
3904
3905 if (sdyn == NULL || htab->elf.sgot == NULL)
3906 abort ();
3907
3908 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3909 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3910 for (; dyncon < dynconend; dyncon++)
3911 {
3912 Elf_Internal_Dyn dyn;
3913 asection *s;
3914
3915 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3916
3917 switch (dyn.d_tag)
3918 {
3919 default:
3920 continue;
3921
3922 case DT_PLTGOT:
3923 s = htab->elf.sgotplt;
3924 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3925 break;
3926
3927 case DT_JMPREL:
3928 s = htab->elf.srelplt;
3929 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3930 break;
3931
3932 case DT_PLTRELSZ:
3933 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3934 break;
3935 }
3936
3937 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3938 }
3939
3940 /* Fill in the special first entry in the procedure linkage table. */
3941 if (htab->elf.splt && htab->elf.splt->size > 0)
3942 {
3943 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3944 if (bfd_link_pic (info))
3945 {
3946 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3947 PLT_FIRST_ENTRY_SIZE);
3948 }
3949 else
3950 {
3951 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3952 PLT_FIRST_ENTRY_SIZE);
3953 bfd_put_32 (output_bfd,
3954 htab->elf.sgotplt->output_section->vma
3955 + htab->elf.sgotplt->output_offset,
3956 htab->elf.splt->contents + 24);
3957 }
3958 elf_section_data (htab->elf.splt->output_section)
3959 ->this_hdr.sh_entsize = 4;
3960 }
3961
3962 }
3963
3964 if (htab->elf.sgotplt)
3965 {
3966 /* Fill in the first three entries in the global offset table. */
3967 if (htab->elf.sgotplt->size > 0)
3968 {
3969 bfd_put_32 (output_bfd,
3970 (sdyn == NULL ? (bfd_vma) 0
3971 : sdyn->output_section->vma + sdyn->output_offset),
3972 htab->elf.sgotplt->contents);
3973 /* One entry for shared object struct ptr. */
3974 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3975 /* One entry for _dl_runtime_resolve. */
3976 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3977 }
3978
3979 elf_section_data (htab->elf.sgotplt->output_section)
3980 ->this_hdr.sh_entsize = 4;
3981 }
3982 /* Finish dynamic symbol for local IFUNC symbols. */
3983 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3984 {
3985 struct plt_entry *local_plt;
3986 Elf_Internal_Sym *isym;
3987 Elf_Internal_Shdr *symtab_hdr;
3988
3989 symtab_hdr = &elf_symtab_hdr (ibfd);
3990
3991 local_plt = elf_s390_local_plt (ibfd);
3992 if (local_plt != NULL)
3993 for (i = 0; i < symtab_hdr->sh_info; i++)
3994 {
3995 if (local_plt[i].plt.offset != (bfd_vma) -1)
3996 {
3997 asection *sec = local_plt[i].sec;
3998 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3999 if (isym == NULL)
4000 return FALSE;
4001
4002 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4003 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
4004 local_plt[i].plt.offset,
4005 isym->st_value
4006 + sec->output_section->vma
4007 + sec->output_offset);
4008
4009 }
4010 }
4011 }
4012 return TRUE;
4013 }
4014 \f
4015 /* Support for core dump NOTE sections. */
4016
4017 static bfd_boolean
4018 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
4019 {
4020 int offset;
4021 unsigned int size;
4022
4023 switch (note->descsz)
4024 {
4025 default:
4026 return FALSE;
4027
4028 case 224: /* S/390 Linux. */
4029 /* pr_cursig */
4030 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4031
4032 /* pr_pid */
4033 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
4034
4035 /* pr_reg */
4036 offset = 72;
4037 size = 144;
4038 break;
4039 }
4040
4041 /* Make a ".reg/999" section. */
4042 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4043 size, note->descpos + offset);
4044 }
4045
4046 static bfd_boolean
4047 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
4048 {
4049 switch (note->descsz)
4050 {
4051 default:
4052 return FALSE;
4053
4054 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
4055 elf_tdata (abfd)->core->pid
4056 = bfd_get_32 (abfd, note->descdata + 12);
4057 elf_tdata (abfd)->core->program
4058 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
4059 elf_tdata (abfd)->core->command
4060 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
4061 break;
4062 }
4063
4064 /* Note that for some reason, a spurious space is tacked
4065 onto the end of the args in some (at least one anyway)
4066 implementations, so strip it off if it exists. */
4067
4068 {
4069 char *command = elf_tdata (abfd)->core->command;
4070 int n = strlen (command);
4071
4072 if (0 < n && command[n - 1] == ' ')
4073 command[n - 1] = '\0';
4074 }
4075
4076 return TRUE;
4077 }
4078
4079 static char *
4080 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
4081 int note_type, ...)
4082 {
4083 va_list ap;
4084
4085 switch (note_type)
4086 {
4087 default:
4088 return NULL;
4089
4090 case NT_PRPSINFO:
4091 {
4092 char data[124] = { 0 };
4093 const char *fname, *psargs;
4094
4095 va_start (ap, note_type);
4096 fname = va_arg (ap, const char *);
4097 psargs = va_arg (ap, const char *);
4098 va_end (ap);
4099
4100 strncpy (data + 28, fname, 16);
4101 strncpy (data + 44, psargs, 80);
4102 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4103 &data, sizeof (data));
4104 }
4105
4106 case NT_PRSTATUS:
4107 {
4108 char data[224] = { 0 };
4109 long pid;
4110 int cursig;
4111 const void *gregs;
4112
4113 va_start (ap, note_type);
4114 pid = va_arg (ap, long);
4115 cursig = va_arg (ap, int);
4116 gregs = va_arg (ap, const void *);
4117 va_end (ap);
4118
4119 bfd_put_16 (abfd, cursig, data + 12);
4120 bfd_put_32 (abfd, pid, data + 24);
4121 memcpy (data + 72, gregs, 144);
4122 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4123 &data, sizeof (data));
4124 }
4125 }
4126 /* NOTREACHED */
4127 }
4128 \f
4129 /* Return address for Ith PLT stub in section PLT, for relocation REL
4130 or (bfd_vma) -1 if it should not be included. */
4131
4132 static bfd_vma
4133 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4134 const arelent *rel ATTRIBUTE_UNUSED)
4135 {
4136 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4137 }
4138
4139 /* Merge backend specific data from an object file to the output
4140 object file when linking. */
4141
4142 static bfd_boolean
4143 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4144 {
4145 bfd *obfd = info->output_bfd;
4146
4147 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4148 return TRUE;
4149
4150 if (!elf_s390_merge_obj_attributes (ibfd, info))
4151 return FALSE;
4152
4153 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4154 return TRUE;
4155 }
4156
4157
4158 #define TARGET_BIG_SYM s390_elf32_vec
4159 #define TARGET_BIG_NAME "elf32-s390"
4160 #define ELF_ARCH bfd_arch_s390
4161 #define ELF_TARGET_ID S390_ELF_DATA
4162 #define ELF_MACHINE_CODE EM_S390
4163 #define ELF_MACHINE_ALT1 EM_S390_OLD
4164 #define ELF_MAXPAGESIZE 0x1000
4165
4166 #define elf_backend_can_gc_sections 1
4167 #define elf_backend_can_refcount 1
4168 #define elf_backend_want_got_plt 1
4169 #define elf_backend_plt_readonly 1
4170 #define elf_backend_want_plt_sym 0
4171 #define elf_backend_got_header_size 12
4172 #define elf_backend_want_dynrelro 1
4173 #define elf_backend_rela_normal 1
4174
4175 #define elf_info_to_howto elf_s390_info_to_howto
4176
4177 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4178 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4179 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4180 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4181
4182 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4183
4184 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4185 #define elf_backend_check_relocs elf_s390_check_relocs
4186 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4187 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4188 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4189 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4190 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4191 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4192 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4193 #define elf_backend_relocate_section elf_s390_relocate_section
4194 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4195 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4196 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4197 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4198 #define elf_backend_write_core_note elf_s390_write_core_note
4199 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4200 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4201 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4202
4203 #define bfd_elf32_mkobject elf_s390_mkobject
4204 #define elf_backend_object_p elf_s390_object_p
4205
4206 #include "elf32-target.h"
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