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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) 2000-2016 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include <stdarg.h>
29
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
36
37 /* The relocation "howto" table. */
38
39 static reloc_howto_type elf_howto_table[] =
40 {
41 HOWTO (R_390_NONE, /* type */
42 0, /* rightshift */
43 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
44 0, /* bitsize */
45 FALSE, /* pc_relative */
46 0, /* bitpos */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
51 0, /* src_mask */
52 0, /* dst_mask */
53 FALSE), /* pcrel_offset */
54
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
172 };
173
174 /* GNU extension to record C++ vtable hierarchy. */
175 static reloc_howto_type elf32_s390_vtinherit_howto =
176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
177 static reloc_howto_type elf32_s390_vtentry_howto =
178 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
179
180 static reloc_howto_type *
181 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182 bfd_reloc_code_real_type code)
183 {
184 switch (code)
185 {
186 case BFD_RELOC_NONE:
187 return &elf_howto_table[(int) R_390_NONE];
188 case BFD_RELOC_8:
189 return &elf_howto_table[(int) R_390_8];
190 case BFD_RELOC_390_12:
191 return &elf_howto_table[(int) R_390_12];
192 case BFD_RELOC_16:
193 return &elf_howto_table[(int) R_390_16];
194 case BFD_RELOC_32:
195 return &elf_howto_table[(int) R_390_32];
196 case BFD_RELOC_CTOR:
197 return &elf_howto_table[(int) R_390_32];
198 case BFD_RELOC_32_PCREL:
199 return &elf_howto_table[(int) R_390_PC32];
200 case BFD_RELOC_390_GOT12:
201 return &elf_howto_table[(int) R_390_GOT12];
202 case BFD_RELOC_32_GOT_PCREL:
203 return &elf_howto_table[(int) R_390_GOT32];
204 case BFD_RELOC_390_PLT32:
205 return &elf_howto_table[(int) R_390_PLT32];
206 case BFD_RELOC_390_COPY:
207 return &elf_howto_table[(int) R_390_COPY];
208 case BFD_RELOC_390_GLOB_DAT:
209 return &elf_howto_table[(int) R_390_GLOB_DAT];
210 case BFD_RELOC_390_JMP_SLOT:
211 return &elf_howto_table[(int) R_390_JMP_SLOT];
212 case BFD_RELOC_390_RELATIVE:
213 return &elf_howto_table[(int) R_390_RELATIVE];
214 case BFD_RELOC_32_GOTOFF:
215 return &elf_howto_table[(int) R_390_GOTOFF32];
216 case BFD_RELOC_390_GOTPC:
217 return &elf_howto_table[(int) R_390_GOTPC];
218 case BFD_RELOC_390_GOT16:
219 return &elf_howto_table[(int) R_390_GOT16];
220 case BFD_RELOC_16_PCREL:
221 return &elf_howto_table[(int) R_390_PC16];
222 case BFD_RELOC_390_PC12DBL:
223 return &elf_howto_table[(int) R_390_PC12DBL];
224 case BFD_RELOC_390_PLT12DBL:
225 return &elf_howto_table[(int) R_390_PLT12DBL];
226 case BFD_RELOC_390_PC16DBL:
227 return &elf_howto_table[(int) R_390_PC16DBL];
228 case BFD_RELOC_390_PLT16DBL:
229 return &elf_howto_table[(int) R_390_PLT16DBL];
230 case BFD_RELOC_390_PC24DBL:
231 return &elf_howto_table[(int) R_390_PC24DBL];
232 case BFD_RELOC_390_PLT24DBL:
233 return &elf_howto_table[(int) R_390_PLT24DBL];
234 case BFD_RELOC_390_PC32DBL:
235 return &elf_howto_table[(int) R_390_PC32DBL];
236 case BFD_RELOC_390_PLT32DBL:
237 return &elf_howto_table[(int) R_390_PLT32DBL];
238 case BFD_RELOC_390_GOTPCDBL:
239 return &elf_howto_table[(int) R_390_GOTPCDBL];
240 case BFD_RELOC_390_GOTENT:
241 return &elf_howto_table[(int) R_390_GOTENT];
242 case BFD_RELOC_16_GOTOFF:
243 return &elf_howto_table[(int) R_390_GOTOFF16];
244 case BFD_RELOC_390_GOTPLT12:
245 return &elf_howto_table[(int) R_390_GOTPLT12];
246 case BFD_RELOC_390_GOTPLT16:
247 return &elf_howto_table[(int) R_390_GOTPLT16];
248 case BFD_RELOC_390_GOTPLT32:
249 return &elf_howto_table[(int) R_390_GOTPLT32];
250 case BFD_RELOC_390_GOTPLTENT:
251 return &elf_howto_table[(int) R_390_GOTPLTENT];
252 case BFD_RELOC_390_PLTOFF16:
253 return &elf_howto_table[(int) R_390_PLTOFF16];
254 case BFD_RELOC_390_PLTOFF32:
255 return &elf_howto_table[(int) R_390_PLTOFF32];
256 case BFD_RELOC_390_TLS_LOAD:
257 return &elf_howto_table[(int) R_390_TLS_LOAD];
258 case BFD_RELOC_390_TLS_GDCALL:
259 return &elf_howto_table[(int) R_390_TLS_GDCALL];
260 case BFD_RELOC_390_TLS_LDCALL:
261 return &elf_howto_table[(int) R_390_TLS_LDCALL];
262 case BFD_RELOC_390_TLS_GD32:
263 return &elf_howto_table[(int) R_390_TLS_GD32];
264 case BFD_RELOC_390_TLS_GOTIE12:
265 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266 case BFD_RELOC_390_TLS_GOTIE32:
267 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268 case BFD_RELOC_390_TLS_LDM32:
269 return &elf_howto_table[(int) R_390_TLS_LDM32];
270 case BFD_RELOC_390_TLS_IE32:
271 return &elf_howto_table[(int) R_390_TLS_IE32];
272 case BFD_RELOC_390_TLS_IEENT:
273 return &elf_howto_table[(int) R_390_TLS_IEENT];
274 case BFD_RELOC_390_TLS_LE32:
275 return &elf_howto_table[(int) R_390_TLS_LE32];
276 case BFD_RELOC_390_TLS_LDO32:
277 return &elf_howto_table[(int) R_390_TLS_LDO32];
278 case BFD_RELOC_390_TLS_DTPMOD:
279 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280 case BFD_RELOC_390_TLS_DTPOFF:
281 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282 case BFD_RELOC_390_TLS_TPOFF:
283 return &elf_howto_table[(int) R_390_TLS_TPOFF];
284 case BFD_RELOC_390_20:
285 return &elf_howto_table[(int) R_390_20];
286 case BFD_RELOC_390_GOT20:
287 return &elf_howto_table[(int) R_390_GOT20];
288 case BFD_RELOC_390_GOTPLT20:
289 return &elf_howto_table[(int) R_390_GOTPLT20];
290 case BFD_RELOC_390_TLS_GOTIE20:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292 case BFD_RELOC_390_IRELATIVE:
293 return &elf_howto_table[(int) R_390_IRELATIVE];
294 case BFD_RELOC_VTABLE_INHERIT:
295 return &elf32_s390_vtinherit_howto;
296 case BFD_RELOC_VTABLE_ENTRY:
297 return &elf32_s390_vtentry_howto;
298 default:
299 break;
300 }
301 return 0;
302 }
303
304 static reloc_howto_type *
305 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
306 const char *r_name)
307 {
308 unsigned int i;
309
310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311 if (elf_howto_table[i].name != NULL
312 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313 return &elf_howto_table[i];
314
315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316 return &elf32_s390_vtinherit_howto;
317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318 return &elf32_s390_vtentry_howto;
319
320 return NULL;
321 }
322
323 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
324 and elf32-s390.c has its own copy. */
325
326 static void
327 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
328 arelent *cache_ptr,
329 Elf_Internal_Rela *dst)
330 {
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
332 switch (r_type)
333 {
334 case R_390_GNU_VTINHERIT:
335 cache_ptr->howto = &elf32_s390_vtinherit_howto;
336 break;
337
338 case R_390_GNU_VTENTRY:
339 cache_ptr->howto = &elf32_s390_vtentry_howto;
340 break;
341
342 default:
343 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
344 {
345 /* xgettext:c-format */
346 _bfd_error_handler (_("%B: invalid relocation type %d"),
347 abfd, (int) r_type);
348 r_type = R_390_NONE;
349 }
350 cache_ptr->howto = &elf_howto_table[r_type];
351 }
352 }
353
354 /* A relocation function which doesn't do anything. */
355 static bfd_reloc_status_type
356 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
357 arelent *reloc_entry,
358 asymbol *symbol ATTRIBUTE_UNUSED,
359 void * data ATTRIBUTE_UNUSED,
360 asection *input_section,
361 bfd *output_bfd,
362 char **error_message ATTRIBUTE_UNUSED)
363 {
364 if (output_bfd)
365 reloc_entry->address += input_section->output_offset;
366 return bfd_reloc_ok;
367 }
368
369 /* Handle the large displacement relocs. */
370 static bfd_reloc_status_type
371 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
372 arelent *reloc_entry,
373 asymbol *symbol,
374 void * data ATTRIBUTE_UNUSED,
375 asection *input_section,
376 bfd *output_bfd,
377 char **error_message ATTRIBUTE_UNUSED)
378 {
379 reloc_howto_type *howto = reloc_entry->howto;
380 bfd_vma relocation;
381 bfd_vma insn;
382
383 if (output_bfd != (bfd *) NULL
384 && (symbol->flags & BSF_SECTION_SYM) == 0
385 && (! howto->partial_inplace
386 || reloc_entry->addend == 0))
387 {
388 reloc_entry->address += input_section->output_offset;
389 return bfd_reloc_ok;
390 }
391
392 if (output_bfd != NULL)
393 return bfd_reloc_continue;
394
395 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
396 return bfd_reloc_outofrange;
397
398 relocation = (symbol->value
399 + symbol->section->output_section->vma
400 + symbol->section->output_offset);
401 relocation += reloc_entry->addend;
402 if (howto->pc_relative)
403 {
404 relocation -= (input_section->output_section->vma
405 + input_section->output_offset);
406 relocation -= reloc_entry->address;
407 }
408
409 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
410 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
411 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
412
413 if ((bfd_signed_vma) relocation < - 0x80000
414 || (bfd_signed_vma) relocation > 0x7ffff)
415 return bfd_reloc_overflow;
416 else
417 return bfd_reloc_ok;
418 }
419
420 static bfd_boolean
421 elf_s390_is_local_label_name (bfd *abfd, const char *name)
422 {
423 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
424 return TRUE;
425
426 return _bfd_elf_is_local_label_name (abfd, name);
427 }
428
429 /* Functions for the 390 ELF linker. */
430
431 /* The name of the dynamic interpreter. This is put in the .interp
432 section. */
433
434 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
435
436 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
437 copying dynamic variables from a shared lib into an app's dynbss
438 section, and instead use a dynamic relocation to point into the
439 shared lib. */
440 #define ELIMINATE_COPY_RELOCS 1
441
442 /* The size in bytes of the first entry in the procedure linkage table. */
443 #define PLT_FIRST_ENTRY_SIZE 32
444 /* The size in bytes of an entry in the procedure linkage table. */
445 #define PLT_ENTRY_SIZE 32
446
447 #define GOT_ENTRY_SIZE 4
448
449 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
450
451 /* The first three entries in a procedure linkage table are reserved,
452 and the initial contents are unimportant (we zero them out).
453 Subsequent entries look like this. See the SVR4 ABI 386
454 supplement to see how this works. */
455
456 /* For the s390, simple addr offset can only be 0 - 4096.
457 To use the full 2 GB address space, several instructions
458 are needed to load an address in a register and execute
459 a branch( or just saving the address)
460
461 Furthermore, only r 0 and 1 are free to use!!! */
462
463 /* The first 3 words in the GOT are then reserved.
464 Word 0 is the address of the dynamic table.
465 Word 1 is a pointer to a structure describing the object
466 Word 2 is used to point to the loader entry address.
467
468 The code for position independent PLT entries looks like this:
469
470 r12 holds addr of the current GOT at entry to the PLT
471
472 The GOT holds the address in the PLT to be executed.
473 The loader then gets:
474 24(15) = Pointer to the structure describing the object.
475 28(15) = Offset into rela.plt
476
477 The loader must then find the module where the function is
478 and insert the address in the GOT.
479
480 Note: 390 can only address +- 64 K relative.
481 We check if offset > 65536, then make a relative branch -64xxx
482 back to a previous defined branch
483
484 PLT1: BASR 1,0 # 2 bytes
485 L 1,22(1) # 4 bytes Load offset in GOT in r 1
486 L 1,(1,12) # 4 bytes Load address from GOT in r1
487 BCR 15,1 # 2 bytes Jump to address
488 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
489 L 1,14(1) # 4 bytes Load offset in symol table in r1
490 BRC 15,-x # 4 bytes Jump to start of PLT
491 .word 0 # 2 bytes filler
492 .long ? # 4 bytes offset in GOT
493 .long ? # 4 bytes offset into rela.plt
494
495 This was the general case. There are two additional, optimizes PLT
496 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
497 First the one for GOT offsets < 4096:
498
499 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
500 BCR 15,1 # 2 bytes Jump to address
501 .word 0,0,0 # 6 bytes filler
502 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
503 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
504 BRC 15,-x # 4 bytes Jump to start of PLT
505 .word 0,0,0 # 6 bytes filler
506 .long ? # 4 bytes offset into rela.plt
507
508 Second the one for GOT offsets < 32768:
509
510 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
511 L 1,(1,12) # 4 bytes Load address from GOT to r1
512 BCR 15,1 # 2 bytes Jump to address
513 .word 0 # 2 bytes filler
514 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
515 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
516 BRC 15,-x # 4 bytes Jump to start of PLT
517 .word 0,0,0 # 6 bytes filler
518 .long ? # 4 bytes offset into rela.plt
519
520 Total = 32 bytes per PLT entry
521
522 The code for static build PLT entries looks like this:
523
524 PLT1: BASR 1,0 # 2 bytes
525 L 1,22(1) # 4 bytes Load address of GOT entry
526 L 1,0(0,1) # 4 bytes Load address from GOT in r1
527 BCR 15,1 # 2 bytes Jump to address
528 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
529 L 1,14(1) # 4 bytes Load offset in symbol table in r1
530 BRC 15,-x # 4 bytes Jump to start of PLT
531 .word 0 # 2 bytes filler
532 .long ? # 4 bytes address of GOT entry
533 .long ? # 4 bytes offset into rela.plt */
534
535 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
536 {
537 0x0d, 0x10, /* basr %r1,%r0 */
538 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
539 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
540 0x07, 0xf1, /* br %r1 */
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
543 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
544 0x00, 0x00, /* padding */
545 0x00, 0x00, 0x00, 0x00, /* GOT offset */
546 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
547 };
548
549 /* Generic PLT pic entry. */
550 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
551 {
552 0x0d, 0x10, /* basr %r1,%r0 */
553 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
554 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
555 0x07, 0xf1, /* br %r1 */
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
558 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
559 0x00, 0x00, /* padding */
560 0x00, 0x00, 0x00, 0x00, /* GOT offset */
561 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
562 };
563
564 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
565 when generating the PLT slot with the GOT offset. */
566 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
567 {
568 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
569 0x07, 0xf1, /* br %r1 */
570 0x00, 0x00, 0x00, 0x00, /* padding */
571 0x00, 0x00,
572 0x0d, 0x10, /* basr %r1,%r0 */
573 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
574 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
575 0x00, 0x00, 0x00, 0x00,
576 0x00, 0x00, 0x00, 0x00
577 };
578
579 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
580 when generating the PLT slot with the GOT offset. */
581 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
582 {
583 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
584 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
585 0x07, 0xf1, /* br %r1 */
586 0x00, 0x00,
587 0x0d, 0x10, /* basr %r1,%r0 */
588 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
589 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
590 0x00, 0x00, 0x00, 0x00,
591 0x00, 0x00, 0x00, 0x00,
592 0x00, 0x00
593 };
594
595 /* The first PLT entry pushes the offset into the rela.plt
596 from R1 onto the stack at 8(15) and the loader object info
597 at 12(15), loads the loader address in R1 and jumps to it. */
598
599 /* The first entry in the PLT for PIC code:
600
601 PLT0:
602 ST 1,28(15) # R1 has offset into rela.plt
603 L 1,4(12) # Get loader ino(object struct address)
604 ST 1,24(15) # Store address
605 L 1,8(12) # Entry address of loader in R1
606 BR 1 # Jump to loader
607
608 The first entry in the PLT for static code:
609
610 PLT0:
611 ST 1,28(15) # R1 has offset into rela.plt
612 BASR 1,0
613 L 1,18(0,1) # Get address of GOT
614 MVC 24(4,15),4(1) # Move loader ino to stack
615 L 1,8(1) # Get address of loader
616 BR 1 # Jump to loader
617 .word 0 # filler
618 .long got # address of GOT */
619
620 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
621 {
622 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
623 0x0d, 0x10, /* basr %r1,%r0 */
624 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
625 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
626 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
627 0x07, 0xf1, /* br %r1 */
628 0x00, 0x00, 0x00, 0x00,
629 0x00, 0x00, 0x00, 0x00,
630 0x00, 0x00
631 };
632
633 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
634 {
635 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
636 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
637 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
638 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
639 0x07, 0xf1, /* br %r1 */
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00, 0x00, 0x00,
642 0x00, 0x00, 0x00, 0x00,
643 0x00, 0x00
644 };
645
646
647 /* s390 ELF linker hash entry. */
648
649 struct elf_s390_link_hash_entry
650 {
651 struct elf_link_hash_entry elf;
652
653 /* Track dynamic relocs copied for this symbol. */
654 struct elf_dyn_relocs *dyn_relocs;
655
656 /* Number of GOTPLT references for a function. */
657 bfd_signed_vma gotplt_refcount;
658
659 #define GOT_UNKNOWN 0
660 #define GOT_NORMAL 1
661 #define GOT_TLS_GD 2
662 #define GOT_TLS_IE 3
663 #define GOT_TLS_IE_NLT 4
664 unsigned char tls_type;
665
666 /* For pointer equality reasons we might need to change the symbol
667 type from STT_GNU_IFUNC to STT_FUNC together with its value and
668 section entry. So after alloc_dynrelocs only these values should
669 be used. In order to check whether a symbol is IFUNC use
670 s390_is_ifunc_symbol_p. */
671 bfd_vma ifunc_resolver_address;
672 asection *ifunc_resolver_section;
673 };
674
675 #define elf_s390_hash_entry(ent) \
676 ((struct elf_s390_link_hash_entry *)(ent))
677
678 /* This structure represents an entry in the local PLT list needed for
679 local IFUNC symbols. */
680 struct plt_entry
681 {
682 /* The section of the local symbol.
683 Set in relocate_section and used in finish_dynamic_sections. */
684 asection *sec;
685
686 union
687 {
688 bfd_signed_vma refcount;
689 bfd_vma offset;
690 } plt;
691 };
692
693 /* NOTE: Keep this structure in sync with
694 the one declared in elf64-s390.c. */
695 struct elf_s390_obj_tdata
696 {
697 struct elf_obj_tdata root;
698
699 /* A local PLT is needed for ifunc symbols. */
700 struct plt_entry *local_plt;
701
702 /* TLS type for each local got entry. */
703 char *local_got_tls_type;
704 };
705
706 #define elf_s390_tdata(abfd) \
707 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
708
709 #define elf_s390_local_plt(abfd) \
710 (elf_s390_tdata (abfd)->local_plt)
711
712 #define elf_s390_local_got_tls_type(abfd) \
713 (elf_s390_tdata (abfd)->local_got_tls_type)
714
715 #define is_s390_elf(bfd) \
716 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
717 && elf_tdata (bfd) != NULL \
718 && elf_object_id (bfd) == S390_ELF_DATA)
719
720 static bfd_boolean
721 elf_s390_mkobject (bfd *abfd)
722 {
723 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
724 S390_ELF_DATA);
725 }
726
727 static bfd_boolean
728 elf_s390_object_p (bfd *abfd)
729 {
730 /* Set the right machine number for an s390 elf32 file. */
731 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
732 }
733
734 /* s390 ELF linker hash table. */
735
736 struct elf_s390_link_hash_table
737 {
738 struct elf_link_hash_table elf;
739
740 /* Short-cuts to get to dynamic linker sections. */
741 asection *sdynbss;
742 asection *srelbss;
743 asection *irelifunc;
744
745 union
746 {
747 bfd_signed_vma refcount;
748 bfd_vma offset;
749 } tls_ldm_got;
750
751 /* Small local sym cache. */
752 struct sym_cache sym_cache;
753 };
754
755 /* Get the s390 ELF linker hash table from a link_info structure. */
756
757 #define elf_s390_hash_table(p) \
758 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
759 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
760
761 #undef ELF64
762 #include "elf-s390-common.c"
763
764 /* Create an entry in an s390 ELF linker hash table. */
765
766 static struct bfd_hash_entry *
767 link_hash_newfunc (struct bfd_hash_entry *entry,
768 struct bfd_hash_table *table,
769 const char *string)
770 {
771 /* Allocate the structure if it has not already been allocated by a
772 subclass. */
773 if (entry == NULL)
774 {
775 entry = bfd_hash_allocate (table,
776 sizeof (struct elf_s390_link_hash_entry));
777 if (entry == NULL)
778 return entry;
779 }
780
781 /* Call the allocation method of the superclass. */
782 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
783 if (entry != NULL)
784 {
785 struct elf_s390_link_hash_entry *eh;
786
787 eh = (struct elf_s390_link_hash_entry *) entry;
788 eh->dyn_relocs = NULL;
789 eh->gotplt_refcount = 0;
790 eh->tls_type = GOT_UNKNOWN;
791 eh->ifunc_resolver_address = 0;
792 eh->ifunc_resolver_section = NULL;
793 }
794
795 return entry;
796 }
797
798 /* Create an s390 ELF linker hash table. */
799
800 static struct bfd_link_hash_table *
801 elf_s390_link_hash_table_create (bfd *abfd)
802 {
803 struct elf_s390_link_hash_table *ret;
804 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
805
806 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
807 if (ret == NULL)
808 return NULL;
809
810 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
811 sizeof (struct elf_s390_link_hash_entry),
812 S390_ELF_DATA))
813 {
814 free (ret);
815 return NULL;
816 }
817
818 return &ret->elf.root;
819 }
820
821 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
822 shortcuts to them in our hash table. */
823
824 static bfd_boolean
825 create_got_section (bfd *dynobj, struct bfd_link_info *info)
826 {
827 struct elf_s390_link_hash_table *htab;
828
829 if (! _bfd_elf_create_got_section (dynobj, info))
830 return FALSE;
831
832 htab = elf_s390_hash_table (info);
833 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
834 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
835 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
836 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
837 abort ();
838
839 return TRUE;
840 }
841
842 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
843 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
844 hash table. */
845
846 static bfd_boolean
847 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
848 {
849 struct elf_s390_link_hash_table *htab;
850
851 htab = elf_s390_hash_table (info);
852 if (!htab->elf.sgot && !create_got_section (dynobj, info))
853 return FALSE;
854
855 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
856 return FALSE;
857
858 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
859 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
860 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
861 if (!bfd_link_pic (info))
862 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
863
864 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
865 || (!bfd_link_pic (info) && !htab->srelbss))
866 abort ();
867
868 return TRUE;
869 }
870
871 /* Copy the extra info we tack onto an elf_link_hash_entry. */
872
873 static void
874 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
875 struct elf_link_hash_entry *dir,
876 struct elf_link_hash_entry *ind)
877 {
878 struct elf_s390_link_hash_entry *edir, *eind;
879
880 edir = (struct elf_s390_link_hash_entry *) dir;
881 eind = (struct elf_s390_link_hash_entry *) ind;
882
883 if (eind->dyn_relocs != NULL)
884 {
885 if (edir->dyn_relocs != NULL)
886 {
887 struct elf_dyn_relocs **pp;
888 struct elf_dyn_relocs *p;
889
890 /* Add reloc counts against the indirect sym to the direct sym
891 list. Merge any entries against the same section. */
892 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
893 {
894 struct elf_dyn_relocs *q;
895
896 for (q = edir->dyn_relocs; q != NULL; q = q->next)
897 if (q->sec == p->sec)
898 {
899 q->pc_count += p->pc_count;
900 q->count += p->count;
901 *pp = p->next;
902 break;
903 }
904 if (q == NULL)
905 pp = &p->next;
906 }
907 *pp = edir->dyn_relocs;
908 }
909
910 edir->dyn_relocs = eind->dyn_relocs;
911 eind->dyn_relocs = NULL;
912 }
913
914 if (ind->root.type == bfd_link_hash_indirect
915 && dir->got.refcount <= 0)
916 {
917 edir->tls_type = eind->tls_type;
918 eind->tls_type = GOT_UNKNOWN;
919 }
920
921 if (ELIMINATE_COPY_RELOCS
922 && ind->root.type != bfd_link_hash_indirect
923 && dir->dynamic_adjusted)
924 {
925 /* If called to transfer flags for a weakdef during processing
926 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
927 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
928 dir->ref_dynamic |= ind->ref_dynamic;
929 dir->ref_regular |= ind->ref_regular;
930 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
931 dir->needs_plt |= ind->needs_plt;
932 }
933 else
934 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
935 }
936
937 static int
938 elf_s390_tls_transition (struct bfd_link_info *info,
939 int r_type,
940 int is_local)
941 {
942 if (bfd_link_pic (info))
943 return r_type;
944
945 switch (r_type)
946 {
947 case R_390_TLS_GD32:
948 case R_390_TLS_IE32:
949 if (is_local)
950 return R_390_TLS_LE32;
951 return R_390_TLS_IE32;
952 case R_390_TLS_GOTIE32:
953 if (is_local)
954 return R_390_TLS_LE32;
955 return R_390_TLS_GOTIE32;
956 case R_390_TLS_LDM32:
957 return R_390_TLS_LE32;
958 }
959
960 return r_type;
961 }
962
963 /* Look through the relocs for a section during the first phase, and
964 allocate space in the global offset table or procedure linkage
965 table. */
966
967 static bfd_boolean
968 elf_s390_check_relocs (bfd *abfd,
969 struct bfd_link_info *info,
970 asection *sec,
971 const Elf_Internal_Rela *relocs)
972 {
973 struct elf_s390_link_hash_table *htab;
974 Elf_Internal_Shdr *symtab_hdr;
975 struct elf_link_hash_entry **sym_hashes;
976 const Elf_Internal_Rela *rel;
977 const Elf_Internal_Rela *rel_end;
978 asection *sreloc;
979 bfd_signed_vma *local_got_refcounts;
980 int tls_type, old_tls_type;
981 Elf_Internal_Sym *isym;
982
983 if (bfd_link_relocatable (info))
984 return TRUE;
985
986 BFD_ASSERT (is_s390_elf (abfd));
987
988 htab = elf_s390_hash_table (info);
989 symtab_hdr = &elf_symtab_hdr (abfd);
990 sym_hashes = elf_sym_hashes (abfd);
991 local_got_refcounts = elf_local_got_refcounts (abfd);
992
993 sreloc = NULL;
994
995 rel_end = relocs + sec->reloc_count;
996 for (rel = relocs; rel < rel_end; rel++)
997 {
998 unsigned int r_type;
999 unsigned long r_symndx;
1000 struct elf_link_hash_entry *h;
1001
1002 r_symndx = ELF32_R_SYM (rel->r_info);
1003
1004 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1005 {
1006 /* xgettext:c-format */
1007 _bfd_error_handler (_("%B: bad symbol index: %d"),
1008 abfd, r_symndx);
1009 return FALSE;
1010 }
1011
1012 if (r_symndx < symtab_hdr->sh_info)
1013 {
1014 /* A local symbol. */
1015 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1016 abfd, r_symndx);
1017 if (isym == NULL)
1018 return FALSE;
1019
1020 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1021 {
1022 struct plt_entry *plt;
1023
1024 if (htab->elf.dynobj == NULL)
1025 htab->elf.dynobj = abfd;
1026
1027 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1028 return FALSE;
1029
1030 if (local_got_refcounts == NULL)
1031 {
1032 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1033 return FALSE;
1034 local_got_refcounts = elf_local_got_refcounts (abfd);
1035 }
1036 plt = elf_s390_local_plt (abfd);
1037 plt[r_symndx].plt.refcount++;
1038 }
1039 h = NULL;
1040 }
1041 else
1042 {
1043 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1044 while (h->root.type == bfd_link_hash_indirect
1045 || h->root.type == bfd_link_hash_warning)
1046 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1047
1048 /* PR15323, ref flags aren't set for references in the same
1049 object. */
1050 h->root.non_ir_ref = 1;
1051 }
1052
1053 /* Create got section and local_got_refcounts array if they
1054 are needed. */
1055 r_type = elf_s390_tls_transition (info,
1056 ELF32_R_TYPE (rel->r_info),
1057 h == NULL);
1058 switch (r_type)
1059 {
1060 case R_390_GOT12:
1061 case R_390_GOT16:
1062 case R_390_GOT20:
1063 case R_390_GOT32:
1064 case R_390_GOTENT:
1065 case R_390_GOTPLT12:
1066 case R_390_GOTPLT16:
1067 case R_390_GOTPLT20:
1068 case R_390_GOTPLT32:
1069 case R_390_GOTPLTENT:
1070 case R_390_TLS_GD32:
1071 case R_390_TLS_GOTIE12:
1072 case R_390_TLS_GOTIE20:
1073 case R_390_TLS_GOTIE32:
1074 case R_390_TLS_IEENT:
1075 case R_390_TLS_IE32:
1076 case R_390_TLS_LDM32:
1077 if (h == NULL
1078 && local_got_refcounts == NULL)
1079 {
1080 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1081 return FALSE;
1082 local_got_refcounts = elf_local_got_refcounts (abfd);
1083 }
1084 /* Fall through. */
1085 case R_390_GOTOFF16:
1086 case R_390_GOTOFF32:
1087 case R_390_GOTPC:
1088 case R_390_GOTPCDBL:
1089 if (htab->elf.sgot == NULL)
1090 {
1091 if (htab->elf.dynobj == NULL)
1092 htab->elf.dynobj = abfd;
1093 if (!create_got_section (htab->elf.dynobj, info))
1094 return FALSE;
1095 }
1096 }
1097
1098 if (h != NULL)
1099 {
1100 if (htab->elf.dynobj == NULL)
1101 htab->elf.dynobj = abfd;
1102 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1103 return FALSE;
1104
1105 /* Make sure an IFUNC symbol defined in a non-shared object
1106 always gets a PLT slot. */
1107 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1108 {
1109 /* The symbol is called by the dynamic loader in order
1110 to resolve the relocation. So it is in fact also
1111 referenced. */
1112 h->ref_regular = 1;
1113 h->needs_plt = 1;
1114 }
1115 }
1116 switch (r_type)
1117 {
1118 case R_390_GOTPC:
1119 case R_390_GOTPCDBL:
1120 /* These relocs do not need a GOT slot. They just load the
1121 GOT pointer itself or address something else relative to
1122 the GOT. Since the GOT pointer has been set up above we
1123 are done. */
1124 break;
1125 case R_390_GOTOFF16:
1126 case R_390_GOTOFF32:
1127 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1128 break;
1129 /* Fall through. */
1130
1131 case R_390_PLT12DBL:
1132 case R_390_PLT16DBL:
1133 case R_390_PLT24DBL:
1134 case R_390_PLT32DBL:
1135 case R_390_PLT32:
1136 case R_390_PLTOFF16:
1137 case R_390_PLTOFF32:
1138 /* This symbol requires a procedure linkage table entry. We
1139 actually build the entry in adjust_dynamic_symbol,
1140 because this might be a case of linking PIC code which is
1141 never referenced by a dynamic object, in which case we
1142 don't need to generate a procedure linkage table entry
1143 after all. */
1144
1145 /* If this is a local symbol, we resolve it directly without
1146 creating a procedure linkage table entry. */
1147 if (h != NULL)
1148 {
1149 h->needs_plt = 1;
1150 h->plt.refcount += 1;
1151 }
1152 break;
1153
1154 case R_390_GOTPLT12:
1155 case R_390_GOTPLT16:
1156 case R_390_GOTPLT20:
1157 case R_390_GOTPLT32:
1158 case R_390_GOTPLTENT:
1159 /* This symbol requires either a procedure linkage table entry
1160 or an entry in the local got. We actually build the entry
1161 in adjust_dynamic_symbol because whether this is really a
1162 global reference can change and with it the fact if we have
1163 to create a plt entry or a local got entry. To be able to
1164 make a once global symbol a local one we have to keep track
1165 of the number of gotplt references that exist for this
1166 symbol. */
1167 if (h != NULL)
1168 {
1169 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1170 h->needs_plt = 1;
1171 h->plt.refcount += 1;
1172 }
1173 else
1174 local_got_refcounts[r_symndx] += 1;
1175 break;
1176
1177 case R_390_TLS_LDM32:
1178 htab->tls_ldm_got.refcount += 1;
1179 break;
1180
1181 case R_390_TLS_IE32:
1182 case R_390_TLS_GOTIE12:
1183 case R_390_TLS_GOTIE20:
1184 case R_390_TLS_GOTIE32:
1185 case R_390_TLS_IEENT:
1186 if (bfd_link_pic (info))
1187 info->flags |= DF_STATIC_TLS;
1188 /* Fall through. */
1189
1190 case R_390_GOT12:
1191 case R_390_GOT16:
1192 case R_390_GOT20:
1193 case R_390_GOT32:
1194 case R_390_GOTENT:
1195 case R_390_TLS_GD32:
1196 /* This symbol requires a global offset table entry. */
1197 switch (r_type)
1198 {
1199 default:
1200 case R_390_GOT12:
1201 case R_390_GOT16:
1202 case R_390_GOT20:
1203 case R_390_GOT32:
1204 case R_390_GOTENT:
1205 tls_type = GOT_NORMAL;
1206 break;
1207 case R_390_TLS_GD32:
1208 tls_type = GOT_TLS_GD;
1209 break;
1210 case R_390_TLS_IE32:
1211 case R_390_TLS_GOTIE32:
1212 tls_type = GOT_TLS_IE;
1213 break;
1214 case R_390_TLS_GOTIE12:
1215 case R_390_TLS_GOTIE20:
1216 case R_390_TLS_IEENT:
1217 tls_type = GOT_TLS_IE_NLT;
1218 break;
1219 }
1220
1221 if (h != NULL)
1222 {
1223 h->got.refcount += 1;
1224 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1225 }
1226 else
1227 {
1228 local_got_refcounts[r_symndx] += 1;
1229 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1230 }
1231 /* If a TLS symbol is accessed using IE at least once,
1232 there is no point to use dynamic model for it. */
1233 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1234 {
1235 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1236 {
1237 _bfd_error_handler
1238 /* xgettext:c-format */
1239 (_("%B: `%s' accessed both as normal and thread local symbol"),
1240 abfd, h->root.root.string);
1241 return FALSE;
1242 }
1243 if (old_tls_type > tls_type)
1244 tls_type = old_tls_type;
1245 }
1246
1247 if (old_tls_type != tls_type)
1248 {
1249 if (h != NULL)
1250 elf_s390_hash_entry (h)->tls_type = tls_type;
1251 else
1252 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1253 }
1254
1255 if (r_type != R_390_TLS_IE32)
1256 break;
1257 /* Fall through. */
1258
1259 case R_390_TLS_LE32:
1260 /* For static linking and executables this reloc will be
1261 calculated at linktime otherwise a TLS_TPOFF runtime
1262 reloc will be generated. */
1263 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1264 break;
1265
1266 if (!bfd_link_pic (info))
1267 break;
1268 info->flags |= DF_STATIC_TLS;
1269 /* Fall through. */
1270
1271 case R_390_8:
1272 case R_390_16:
1273 case R_390_32:
1274 case R_390_PC16:
1275 case R_390_PC12DBL:
1276 case R_390_PC16DBL:
1277 case R_390_PC24DBL:
1278 case R_390_PC32DBL:
1279 case R_390_PC32:
1280 if (h != NULL && bfd_link_executable (info))
1281 {
1282 /* If this reloc is in a read-only section, we might
1283 need a copy reloc. We can't check reliably at this
1284 stage whether the section is read-only, as input
1285 sections have not yet been mapped to output sections.
1286 Tentatively set the flag for now, and correct in
1287 adjust_dynamic_symbol. */
1288 h->non_got_ref = 1;
1289
1290 if (!bfd_link_pic (info))
1291 {
1292 /* We may need a .plt entry if the function this reloc
1293 refers to is in a shared lib. */
1294 h->plt.refcount += 1;
1295 }
1296 }
1297
1298 /* If we are creating a shared library, and this is a reloc
1299 against a global symbol, or a non PC relative reloc
1300 against a local symbol, then we need to copy the reloc
1301 into the shared library. However, if we are linking with
1302 -Bsymbolic, we do not need to copy a reloc against a
1303 global symbol which is defined in an object we are
1304 including in the link (i.e., DEF_REGULAR is set). At
1305 this point we have not seen all the input files, so it is
1306 possible that DEF_REGULAR is not set now but will be set
1307 later (it is never cleared). In case of a weak definition,
1308 DEF_REGULAR may be cleared later by a strong definition in
1309 a shared library. We account for that possibility below by
1310 storing information in the relocs_copied field of the hash
1311 table entry. A similar situation occurs when creating
1312 shared libraries and symbol visibility changes render the
1313 symbol local.
1314
1315 If on the other hand, we are creating an executable, we
1316 may need to keep relocations for symbols satisfied by a
1317 dynamic library if we manage to avoid copy relocs for the
1318 symbol. */
1319 if ((bfd_link_pic (info)
1320 && (sec->flags & SEC_ALLOC) != 0
1321 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1322 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1323 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1324 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1325 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1326 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1327 || (h != NULL
1328 && (! SYMBOLIC_BIND (info, h)
1329 || h->root.type == bfd_link_hash_defweak
1330 || !h->def_regular))))
1331 || (ELIMINATE_COPY_RELOCS
1332 && !bfd_link_pic (info)
1333 && (sec->flags & SEC_ALLOC) != 0
1334 && h != NULL
1335 && (h->root.type == bfd_link_hash_defweak
1336 || !h->def_regular)))
1337 {
1338 struct elf_dyn_relocs *p;
1339 struct elf_dyn_relocs **head;
1340
1341 /* We must copy these reloc types into the output file.
1342 Create a reloc section in dynobj and make room for
1343 this reloc. */
1344 if (sreloc == NULL)
1345 {
1346 if (htab->elf.dynobj == NULL)
1347 htab->elf.dynobj = abfd;
1348
1349 sreloc = _bfd_elf_make_dynamic_reloc_section
1350 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1351
1352 if (sreloc == NULL)
1353 return FALSE;
1354 }
1355
1356 /* If this is a global symbol, we count the number of
1357 relocations we need for this symbol. */
1358 if (h != NULL)
1359 {
1360 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1361 }
1362 else
1363 {
1364 /* Track dynamic relocs needed for local syms too.
1365 We really need local syms available to do this
1366 easily. Oh well. */
1367 asection *s;
1368 void *vpp;
1369
1370 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1371 abfd, r_symndx);
1372 if (isym == NULL)
1373 return FALSE;
1374
1375 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1376 if (s == NULL)
1377 s = sec;
1378
1379 vpp = &elf_section_data (s)->local_dynrel;
1380 head = (struct elf_dyn_relocs **) vpp;
1381 }
1382
1383 p = *head;
1384 if (p == NULL || p->sec != sec)
1385 {
1386 bfd_size_type amt = sizeof *p;
1387
1388 p = ((struct elf_dyn_relocs *)
1389 bfd_alloc (htab->elf.dynobj, amt));
1390 if (p == NULL)
1391 return FALSE;
1392 p->next = *head;
1393 *head = p;
1394 p->sec = sec;
1395 p->count = 0;
1396 p->pc_count = 0;
1397 }
1398
1399 p->count += 1;
1400 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1401 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1402 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1403 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1404 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1405 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1406 p->pc_count += 1;
1407 }
1408 break;
1409
1410 /* This relocation describes the C++ object vtable hierarchy.
1411 Reconstruct it for later use during GC. */
1412 case R_390_GNU_VTINHERIT:
1413 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1414 return FALSE;
1415 break;
1416
1417 /* This relocation describes which C++ vtable entries are actually
1418 used. Record for later use during GC. */
1419 case R_390_GNU_VTENTRY:
1420 BFD_ASSERT (h != NULL);
1421 if (h != NULL
1422 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1423 return FALSE;
1424 break;
1425
1426 default:
1427 break;
1428 }
1429 }
1430
1431 return TRUE;
1432 }
1433
1434 /* Return the section that should be marked against GC for a given
1435 relocation. */
1436
1437 static asection *
1438 elf_s390_gc_mark_hook (asection *sec,
1439 struct bfd_link_info *info,
1440 Elf_Internal_Rela *rel,
1441 struct elf_link_hash_entry *h,
1442 Elf_Internal_Sym *sym)
1443 {
1444 if (h != NULL)
1445 switch (ELF32_R_TYPE (rel->r_info))
1446 {
1447 case R_390_GNU_VTINHERIT:
1448 case R_390_GNU_VTENTRY:
1449 return NULL;
1450 }
1451 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1452
1453 }
1454
1455 /* Update the got entry reference counts for the section being removed. */
1456
1457 static bfd_boolean
1458 elf_s390_gc_sweep_hook (bfd *abfd,
1459 struct bfd_link_info *info,
1460 asection *sec,
1461 const Elf_Internal_Rela *relocs)
1462 {
1463 struct elf_s390_link_hash_table *htab;
1464 Elf_Internal_Shdr *symtab_hdr;
1465 struct elf_link_hash_entry **sym_hashes;
1466 bfd_signed_vma *local_got_refcounts;
1467 const Elf_Internal_Rela *rel, *relend;
1468
1469 if (bfd_link_relocatable (info))
1470 return TRUE;
1471
1472 htab = elf_s390_hash_table (info);
1473 if (htab == NULL)
1474 return FALSE;
1475
1476 elf_section_data (sec)->local_dynrel = NULL;
1477
1478 symtab_hdr = &elf_symtab_hdr (abfd);
1479 sym_hashes = elf_sym_hashes (abfd);
1480 local_got_refcounts = elf_local_got_refcounts (abfd);
1481
1482 relend = relocs + sec->reloc_count;
1483 for (rel = relocs; rel < relend; rel++)
1484 {
1485 unsigned long r_symndx;
1486 unsigned int r_type;
1487 struct elf_link_hash_entry *h = NULL;
1488
1489 r_symndx = ELF32_R_SYM (rel->r_info);
1490 if (r_symndx >= symtab_hdr->sh_info)
1491 {
1492 struct elf_s390_link_hash_entry *eh;
1493 struct elf_dyn_relocs **pp;
1494 struct elf_dyn_relocs *p;
1495
1496 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1497 while (h->root.type == bfd_link_hash_indirect
1498 || h->root.type == bfd_link_hash_warning)
1499 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1500 eh = (struct elf_s390_link_hash_entry *) h;
1501
1502 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1503 if (p->sec == sec)
1504 {
1505 /* Everything must go for SEC. */
1506 *pp = p->next;
1507 break;
1508 }
1509 }
1510 else
1511 {
1512 Elf_Internal_Sym *isym;
1513
1514 /* A local symbol. */
1515 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1516 abfd, r_symndx);
1517 if (isym == NULL)
1518 return FALSE;
1519
1520 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1521 {
1522 struct plt_entry *plt = elf_s390_local_plt (abfd);
1523 if (plt[r_symndx].plt.refcount > 0)
1524 plt[r_symndx].plt.refcount--;
1525 }
1526 }
1527
1528 r_type = ELF32_R_TYPE (rel->r_info);
1529 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1530 switch (r_type)
1531 {
1532 case R_390_TLS_LDM32:
1533 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1534 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1535 break;
1536
1537 case R_390_GOTOFF16:
1538 case R_390_GOTOFF32:
1539 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1540 {
1541 h->plt.refcount--;
1542 break;
1543 }
1544
1545 case R_390_GOTPC:
1546 case R_390_GOTPCDBL:
1547 break;
1548
1549 case R_390_TLS_GD32:
1550 case R_390_TLS_IE32:
1551 case R_390_TLS_GOTIE12:
1552 case R_390_TLS_GOTIE20:
1553 case R_390_TLS_GOTIE32:
1554 case R_390_TLS_IEENT:
1555 case R_390_GOT12:
1556 case R_390_GOT16:
1557 case R_390_GOT20:
1558 case R_390_GOT32:
1559 case R_390_GOTENT:
1560 if (h != NULL)
1561 {
1562 if (h->got.refcount > 0)
1563 h->got.refcount -= 1;
1564 }
1565 else if (local_got_refcounts != NULL)
1566 {
1567 if (local_got_refcounts[r_symndx] > 0)
1568 local_got_refcounts[r_symndx] -= 1;
1569 }
1570 break;
1571
1572 case R_390_8:
1573 case R_390_12:
1574 case R_390_16:
1575 case R_390_20:
1576 case R_390_32:
1577 case R_390_PC16:
1578 case R_390_PC12DBL:
1579 case R_390_PC16DBL:
1580 case R_390_PC24DBL:
1581 case R_390_PC32DBL:
1582 case R_390_PC32:
1583 if (bfd_link_pic (info))
1584 break;
1585 /* Fall through. */
1586
1587 case R_390_PLT12DBL:
1588 case R_390_PLT16DBL:
1589 case R_390_PLT24DBL:
1590 case R_390_PLT32DBL:
1591 case R_390_PLT32:
1592 case R_390_PLTOFF16:
1593 case R_390_PLTOFF32:
1594 if (h != NULL)
1595 {
1596 if (h->plt.refcount > 0)
1597 h->plt.refcount -= 1;
1598 }
1599 break;
1600
1601 case R_390_GOTPLT12:
1602 case R_390_GOTPLT16:
1603 case R_390_GOTPLT20:
1604 case R_390_GOTPLT32:
1605 case R_390_GOTPLTENT:
1606 if (h != NULL)
1607 {
1608 if (h->plt.refcount > 0)
1609 {
1610 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1611 h->plt.refcount -= 1;
1612 }
1613 }
1614 else if (local_got_refcounts != NULL)
1615 {
1616 if (local_got_refcounts[r_symndx] > 0)
1617 local_got_refcounts[r_symndx] -= 1;
1618 }
1619 break;
1620
1621 default:
1622 break;
1623 }
1624 }
1625
1626 return TRUE;
1627 }
1628
1629 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1630 entry but we found we will not create any. Called when we find we will
1631 not have any PLT for this symbol, by for example
1632 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1633 or elf_s390_size_dynamic_sections if no dynamic sections will be
1634 created (we're only linking static objects). */
1635
1636 static void
1637 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1638 {
1639 if (h->elf.root.type == bfd_link_hash_warning)
1640 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1641
1642 if (h->gotplt_refcount <= 0)
1643 return;
1644
1645 /* We simply add the number of gotplt references to the number
1646 * of got references for this symbol. */
1647 h->elf.got.refcount += h->gotplt_refcount;
1648 h->gotplt_refcount = -1;
1649 }
1650
1651 /* Adjust a symbol defined by a dynamic object and referenced by a
1652 regular object. The current definition is in some section of the
1653 dynamic object, but we're not including those sections. We have to
1654 change the definition to something the rest of the link can
1655 understand. */
1656
1657 static bfd_boolean
1658 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1659 struct elf_link_hash_entry *h)
1660 {
1661 struct elf_s390_link_hash_table *htab;
1662 asection *s;
1663
1664 /* STT_GNU_IFUNC symbol must go through PLT. */
1665 if (s390_is_ifunc_symbol_p (h))
1666 {
1667 /* All local STT_GNU_IFUNC references must be treated as local
1668 calls via local PLT. */
1669 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1670 {
1671 bfd_size_type pc_count = 0, count = 0;
1672 struct elf_dyn_relocs **pp;
1673 struct elf_s390_link_hash_entry *eh;
1674 struct elf_dyn_relocs *p;
1675
1676 eh = (struct elf_s390_link_hash_entry *) h;
1677 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1678 {
1679 pc_count += p->pc_count;
1680 p->count -= p->pc_count;
1681 p->pc_count = 0;
1682 count += p->count;
1683 if (p->count == 0)
1684 *pp = p->next;
1685 else
1686 pp = &p->next;
1687 }
1688
1689 if (pc_count || count)
1690 {
1691 h->needs_plt = 1;
1692 h->non_got_ref = 1;
1693 if (h->plt.refcount <= 0)
1694 h->plt.refcount = 1;
1695 else
1696 h->plt.refcount += 1;
1697 }
1698 }
1699
1700 if (h->plt.refcount <= 0)
1701 {
1702 h->plt.offset = (bfd_vma) -1;
1703 h->needs_plt = 0;
1704 }
1705 return TRUE;
1706 }
1707
1708 /* If this is a function, put it in the procedure linkage table. We
1709 will fill in the contents of the procedure linkage table later
1710 (although we could actually do it here). */
1711 if (h->type == STT_FUNC
1712 || h->needs_plt)
1713 {
1714 if (h->plt.refcount <= 0
1715 || SYMBOL_CALLS_LOCAL (info, h)
1716 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1717 && h->root.type != bfd_link_hash_undefweak))
1718 {
1719 /* This case can occur if we saw a PLT32 reloc in an input
1720 file, but the symbol was never referred to by a dynamic
1721 object, or if all references were garbage collected. In
1722 such a case, we don't actually need to build a procedure
1723 linkage table, and we can just do a PC32 reloc instead. */
1724 h->plt.offset = (bfd_vma) -1;
1725 h->needs_plt = 0;
1726 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1727 }
1728
1729 return TRUE;
1730 }
1731 else
1732 /* It's possible that we incorrectly decided a .plt reloc was
1733 needed for an R_390_PC32 reloc to a non-function sym in
1734 check_relocs. We can't decide accurately between function and
1735 non-function syms in check-relocs; Objects loaded later in
1736 the link may change h->type. So fix it now. */
1737 h->plt.offset = (bfd_vma) -1;
1738
1739 /* If this is a weak symbol, and there is a real definition, the
1740 processor independent code will have arranged for us to see the
1741 real definition first, and we can just use the same value. */
1742 if (h->u.weakdef != NULL)
1743 {
1744 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1745 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1746 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1747 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1748 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1749 h->non_got_ref = h->u.weakdef->non_got_ref;
1750 return TRUE;
1751 }
1752
1753 /* This is a reference to a symbol defined by a dynamic object which
1754 is not a function. */
1755
1756 /* If we are creating a shared library, we must presume that the
1757 only references to the symbol are via the global offset table.
1758 For such cases we need not do anything here; the relocations will
1759 be handled correctly by relocate_section. */
1760 if (bfd_link_pic (info))
1761 return TRUE;
1762
1763 /* If there are no references to this symbol that do not use the
1764 GOT, we don't need to generate a copy reloc. */
1765 if (!h->non_got_ref)
1766 return TRUE;
1767
1768 /* If -z nocopyreloc was given, we won't generate them either. */
1769 if (info->nocopyreloc)
1770 {
1771 h->non_got_ref = 0;
1772 return TRUE;
1773 }
1774
1775 if (ELIMINATE_COPY_RELOCS)
1776 {
1777 struct elf_s390_link_hash_entry * eh;
1778 struct elf_dyn_relocs *p;
1779
1780 eh = (struct elf_s390_link_hash_entry *) h;
1781 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1782 {
1783 s = p->sec->output_section;
1784 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1785 break;
1786 }
1787
1788 /* If we didn't find any dynamic relocs in read-only sections, then
1789 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1790 if (p == NULL)
1791 {
1792 h->non_got_ref = 0;
1793 return TRUE;
1794 }
1795 }
1796
1797 /* We must allocate the symbol in our .dynbss section, which will
1798 become part of the .bss section of the executable. There will be
1799 an entry for this symbol in the .dynsym section. The dynamic
1800 object will contain position independent code, so all references
1801 from the dynamic object to this symbol will go through the global
1802 offset table. The dynamic linker will use the .dynsym entry to
1803 determine the address it must put in the global offset table, so
1804 both the dynamic object and the regular object will refer to the
1805 same memory location for the variable. */
1806
1807 htab = elf_s390_hash_table (info);
1808
1809 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1810 copy the initial value out of the dynamic object and into the
1811 runtime process image. */
1812 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1813 {
1814 htab->srelbss->size += sizeof (Elf32_External_Rela);
1815 h->needs_copy = 1;
1816 }
1817
1818 s = htab->sdynbss;
1819
1820 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1821 }
1822
1823 /* Allocate space in .plt, .got and associated reloc sections for
1824 dynamic relocs. */
1825
1826 static bfd_boolean
1827 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1828 {
1829 struct bfd_link_info *info;
1830 struct elf_s390_link_hash_table *htab;
1831 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1832 struct elf_dyn_relocs *p;
1833
1834 if (h->root.type == bfd_link_hash_indirect)
1835 return TRUE;
1836
1837 info = (struct bfd_link_info *) inf;
1838 htab = elf_s390_hash_table (info);
1839
1840 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1841 here if it is defined and referenced in a non-shared object. */
1842 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1843 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1844 else if (htab->elf.dynamic_sections_created
1845 && h->plt.refcount > 0)
1846 {
1847 /* Make sure this symbol is output as a dynamic symbol.
1848 Undefined weak syms won't yet be marked as dynamic. */
1849 if (h->dynindx == -1
1850 && !h->forced_local)
1851 {
1852 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1853 return FALSE;
1854 }
1855
1856 if (bfd_link_pic (info)
1857 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1858 {
1859 asection *s = htab->elf.splt;
1860
1861 /* If this is the first .plt entry, make room for the special
1862 first entry. */
1863 if (s->size == 0)
1864 s->size += PLT_FIRST_ENTRY_SIZE;
1865
1866 h->plt.offset = s->size;
1867
1868 /* If this symbol is not defined in a regular file, and we are
1869 not generating a shared library, then set the symbol to this
1870 location in the .plt. This is required to make function
1871 pointers compare as equal between the normal executable and
1872 the shared library. */
1873 if (! bfd_link_pic (info)
1874 && !h->def_regular)
1875 {
1876 h->root.u.def.section = s;
1877 h->root.u.def.value = h->plt.offset;
1878 }
1879
1880 /* Make room for this entry. */
1881 s->size += PLT_ENTRY_SIZE;
1882
1883 /* We also need to make an entry in the .got.plt section, which
1884 will be placed in the .got section by the linker script. */
1885 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1886
1887 /* We also need to make an entry in the .rela.plt section. */
1888 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1889 }
1890 else
1891 {
1892 h->plt.offset = (bfd_vma) -1;
1893 h->needs_plt = 0;
1894 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1895 }
1896 }
1897 else
1898 {
1899 h->plt.offset = (bfd_vma) -1;
1900 h->needs_plt = 0;
1901 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1902 }
1903
1904 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1905 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1906 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1907 we can save the dynamic TLS relocation. */
1908 if (h->got.refcount > 0
1909 && !bfd_link_pic (info)
1910 && h->dynindx == -1
1911 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1912 {
1913 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1914 /* For the GOTIE access without a literal pool entry the offset has
1915 to be stored somewhere. The immediate value in the instruction
1916 is not bit enough so the value is stored in the got. */
1917 {
1918 h->got.offset = htab->elf.sgot->size;
1919 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1920 }
1921 else
1922 h->got.offset = (bfd_vma) -1;
1923 }
1924 else if (h->got.refcount > 0)
1925 {
1926 asection *s;
1927 bfd_boolean dyn;
1928 int tls_type = elf_s390_hash_entry(h)->tls_type;
1929
1930 /* Make sure this symbol is output as a dynamic symbol.
1931 Undefined weak syms won't yet be marked as dynamic. */
1932 if (h->dynindx == -1
1933 && !h->forced_local)
1934 {
1935 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1936 return FALSE;
1937 }
1938
1939 s = htab->elf.sgot;
1940 h->got.offset = s->size;
1941 s->size += GOT_ENTRY_SIZE;
1942 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1943 if (tls_type == GOT_TLS_GD)
1944 s->size += GOT_ENTRY_SIZE;
1945 dyn = htab->elf.dynamic_sections_created;
1946 /* R_390_TLS_IE32 needs one dynamic relocation,
1947 R_390_TLS_GD32 needs one if local symbol and two if global. */
1948 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1949 || tls_type >= GOT_TLS_IE)
1950 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1951 else if (tls_type == GOT_TLS_GD)
1952 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1953 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1954 || h->root.type != bfd_link_hash_undefweak)
1955 && (bfd_link_pic (info)
1956 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1957 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1958 }
1959 else
1960 h->got.offset = (bfd_vma) -1;
1961
1962 if (eh->dyn_relocs == NULL)
1963 return TRUE;
1964
1965 /* In the shared -Bsymbolic case, discard space allocated for
1966 dynamic pc-relative relocs against symbols which turn out to be
1967 defined in regular objects. For the normal shared case, discard
1968 space for pc-relative relocs that have become local due to symbol
1969 visibility changes. */
1970
1971 if (bfd_link_pic (info))
1972 {
1973 if (SYMBOL_CALLS_LOCAL (info, h))
1974 {
1975 struct elf_dyn_relocs **pp;
1976
1977 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1978 {
1979 p->count -= p->pc_count;
1980 p->pc_count = 0;
1981 if (p->count == 0)
1982 *pp = p->next;
1983 else
1984 pp = &p->next;
1985 }
1986 }
1987
1988 /* Also discard relocs on undefined weak syms with non-default
1989 visibility. */
1990 if (eh->dyn_relocs != NULL
1991 && h->root.type == bfd_link_hash_undefweak)
1992 {
1993 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1994 eh->dyn_relocs = NULL;
1995
1996 /* Make sure undefined weak symbols are output as a dynamic
1997 symbol in PIEs. */
1998 else if (h->dynindx == -1
1999 && !h->forced_local)
2000 {
2001 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2002 return FALSE;
2003 }
2004 }
2005 }
2006 else if (ELIMINATE_COPY_RELOCS)
2007 {
2008 /* For the non-shared case, discard space for relocs against
2009 symbols which turn out to need copy relocs or are not
2010 dynamic. */
2011
2012 if (!h->non_got_ref
2013 && ((h->def_dynamic
2014 && !h->def_regular)
2015 || (htab->elf.dynamic_sections_created
2016 && (h->root.type == bfd_link_hash_undefweak
2017 || h->root.type == bfd_link_hash_undefined))))
2018 {
2019 /* Make sure this symbol is output as a dynamic symbol.
2020 Undefined weak syms won't yet be marked as dynamic. */
2021 if (h->dynindx == -1
2022 && !h->forced_local)
2023 {
2024 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2025 return FALSE;
2026 }
2027
2028 /* If that succeeded, we know we'll be keeping all the
2029 relocs. */
2030 if (h->dynindx != -1)
2031 goto keep;
2032 }
2033
2034 eh->dyn_relocs = NULL;
2035
2036 keep: ;
2037 }
2038
2039 /* Finally, allocate space. */
2040 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2041 {
2042 asection *sreloc = elf_section_data (p->sec)->sreloc;
2043
2044 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2045 }
2046
2047 return TRUE;
2048 }
2049
2050 /* Find any dynamic relocs that apply to read-only sections. */
2051
2052 static bfd_boolean
2053 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2054 {
2055 struct elf_s390_link_hash_entry *eh;
2056 struct elf_dyn_relocs *p;
2057
2058 eh = (struct elf_s390_link_hash_entry *) h;
2059 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2060 {
2061 asection *s = p->sec->output_section;
2062
2063 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2064 {
2065 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2066
2067 info->flags |= DF_TEXTREL;
2068
2069 /* Not an error, just cut short the traversal. */
2070 return FALSE;
2071 }
2072 }
2073 return TRUE;
2074 }
2075
2076 /* Set the sizes of the dynamic sections. */
2077
2078 static bfd_boolean
2079 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2080 struct bfd_link_info *info)
2081 {
2082 struct elf_s390_link_hash_table *htab;
2083 bfd *dynobj;
2084 asection *s;
2085 bfd_boolean relocs;
2086 bfd *ibfd;
2087
2088 htab = elf_s390_hash_table (info);
2089 dynobj = htab->elf.dynobj;
2090 if (dynobj == NULL)
2091 abort ();
2092
2093 if (htab->elf.dynamic_sections_created)
2094 {
2095 /* Set the contents of the .interp section to the interpreter. */
2096 if (bfd_link_executable (info) && !info->nointerp)
2097 {
2098 s = bfd_get_linker_section (dynobj, ".interp");
2099 if (s == NULL)
2100 abort ();
2101 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2102 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2103 }
2104 }
2105
2106 /* Set up .got offsets for local syms, and space for local dynamic
2107 relocs. */
2108 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2109 {
2110 bfd_signed_vma *local_got;
2111 bfd_signed_vma *end_local_got;
2112 char *local_tls_type;
2113 bfd_size_type locsymcount;
2114 Elf_Internal_Shdr *symtab_hdr;
2115 asection *srela;
2116 struct plt_entry *local_plt;
2117 unsigned int i;
2118
2119 if (! is_s390_elf (ibfd))
2120 continue;
2121
2122 for (s = ibfd->sections; s != NULL; s = s->next)
2123 {
2124 struct elf_dyn_relocs *p;
2125
2126 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2127 {
2128 if (!bfd_is_abs_section (p->sec)
2129 && bfd_is_abs_section (p->sec->output_section))
2130 {
2131 /* Input section has been discarded, either because
2132 it is a copy of a linkonce section or due to
2133 linker script /DISCARD/, so we'll be discarding
2134 the relocs too. */
2135 }
2136 else if (p->count != 0)
2137 {
2138 srela = elf_section_data (p->sec)->sreloc;
2139 srela->size += p->count * sizeof (Elf32_External_Rela);
2140 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2141 info->flags |= DF_TEXTREL;
2142 }
2143 }
2144 }
2145
2146 local_got = elf_local_got_refcounts (ibfd);
2147 if (!local_got)
2148 continue;
2149
2150 symtab_hdr = &elf_symtab_hdr (ibfd);
2151 locsymcount = symtab_hdr->sh_info;
2152 end_local_got = local_got + locsymcount;
2153 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2154 s = htab->elf.sgot;
2155 srela = htab->elf.srelgot;
2156 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2157 {
2158 if (*local_got > 0)
2159 {
2160 *local_got = s->size;
2161 s->size += GOT_ENTRY_SIZE;
2162 if (*local_tls_type == GOT_TLS_GD)
2163 s->size += GOT_ENTRY_SIZE;
2164 if (bfd_link_pic (info))
2165 srela->size += sizeof (Elf32_External_Rela);
2166 }
2167 else
2168 *local_got = (bfd_vma) -1;
2169 }
2170 local_plt = elf_s390_local_plt (ibfd);
2171 for (i = 0; i < symtab_hdr->sh_info; i++)
2172 {
2173 if (local_plt[i].plt.refcount > 0)
2174 {
2175 local_plt[i].plt.offset = htab->elf.iplt->size;
2176 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2177 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2178 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2179 }
2180 else
2181 local_plt[i].plt.offset = (bfd_vma) -1;
2182 }
2183 }
2184
2185 if (htab->tls_ldm_got.refcount > 0)
2186 {
2187 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2188 relocs. */
2189 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2190 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2191 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2192 }
2193 else
2194 htab->tls_ldm_got.offset = -1;
2195
2196 /* Allocate global sym .plt and .got entries, and space for global
2197 sym dynamic relocs. */
2198 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2199
2200 /* We now have determined the sizes of the various dynamic sections.
2201 Allocate memory for them. */
2202 relocs = FALSE;
2203 for (s = dynobj->sections; s != NULL; s = s->next)
2204 {
2205 if ((s->flags & SEC_LINKER_CREATED) == 0)
2206 continue;
2207
2208 if (s == htab->elf.splt
2209 || s == htab->elf.sgot
2210 || s == htab->elf.sgotplt
2211 || s == htab->sdynbss
2212 || s == htab->elf.iplt
2213 || s == htab->elf.igotplt
2214 || s == htab->irelifunc)
2215 {
2216 /* Strip this section if we don't need it; see the
2217 comment below. */
2218 }
2219 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2220 {
2221 if (s->size != 0)
2222 relocs = TRUE;
2223
2224 /* We use the reloc_count field as a counter if we need
2225 to copy relocs into the output file. */
2226 s->reloc_count = 0;
2227 }
2228 else
2229 {
2230 /* It's not one of our sections, so don't allocate space. */
2231 continue;
2232 }
2233
2234 if (s->size == 0)
2235 {
2236 /* If we don't need this section, strip it from the
2237 output file. This is to handle .rela.bss and
2238 .rela.plt. We must create it in
2239 create_dynamic_sections, because it must be created
2240 before the linker maps input sections to output
2241 sections. The linker does that before
2242 adjust_dynamic_symbol is called, and it is that
2243 function which decides whether anything needs to go
2244 into these sections. */
2245
2246 s->flags |= SEC_EXCLUDE;
2247 continue;
2248 }
2249
2250 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2251 continue;
2252
2253 /* Allocate memory for the section contents. We use bfd_zalloc
2254 here in case unused entries are not reclaimed before the
2255 section's contents are written out. This should not happen,
2256 but this way if it does, we get a R_390_NONE reloc instead
2257 of garbage. */
2258 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2259 if (s->contents == NULL)
2260 return FALSE;
2261 }
2262
2263 if (htab->elf.dynamic_sections_created)
2264 {
2265 /* Add some entries to the .dynamic section. We fill in the
2266 values later, in elf_s390_finish_dynamic_sections, but we
2267 must add the entries now so that we get the correct size for
2268 the .dynamic section. The DT_DEBUG entry is filled in by the
2269 dynamic linker and used by the debugger. */
2270 #define add_dynamic_entry(TAG, VAL) \
2271 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2272
2273 if (bfd_link_executable (info))
2274 {
2275 if (!add_dynamic_entry (DT_DEBUG, 0))
2276 return FALSE;
2277 }
2278
2279 if (htab->elf.splt->size != 0)
2280 {
2281 if (!add_dynamic_entry (DT_PLTGOT, 0)
2282 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2283 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2284 || !add_dynamic_entry (DT_JMPREL, 0))
2285 return FALSE;
2286 }
2287
2288 if (relocs)
2289 {
2290 if (!add_dynamic_entry (DT_RELA, 0)
2291 || !add_dynamic_entry (DT_RELASZ, 0)
2292 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2293 return FALSE;
2294
2295 /* If any dynamic relocs apply to a read-only section,
2296 then we need a DT_TEXTREL entry. */
2297 if ((info->flags & DF_TEXTREL) == 0)
2298 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2299
2300 if ((info->flags & DF_TEXTREL) != 0)
2301 {
2302 if (!add_dynamic_entry (DT_TEXTREL, 0))
2303 return FALSE;
2304 }
2305 }
2306 }
2307 #undef add_dynamic_entry
2308
2309 return TRUE;
2310 }
2311
2312 /* Return the base VMA address which should be subtracted from real addresses
2313 when resolving @dtpoff relocation.
2314 This is PT_TLS segment p_vaddr. */
2315
2316 static bfd_vma
2317 dtpoff_base (struct bfd_link_info *info)
2318 {
2319 /* If tls_sec is NULL, we should have signalled an error already. */
2320 if (elf_hash_table (info)->tls_sec == NULL)
2321 return 0;
2322 return elf_hash_table (info)->tls_sec->vma;
2323 }
2324
2325 /* Return the relocation value for @tpoff relocation
2326 if STT_TLS virtual address is ADDRESS. */
2327
2328 static bfd_vma
2329 tpoff (struct bfd_link_info *info, bfd_vma address)
2330 {
2331 struct elf_link_hash_table *htab = elf_hash_table (info);
2332
2333 /* If tls_sec is NULL, we should have signalled an error already. */
2334 if (htab->tls_sec == NULL)
2335 return 0;
2336 return htab->tls_size + htab->tls_sec->vma - address;
2337 }
2338
2339 /* Complain if TLS instruction relocation is against an invalid
2340 instruction. */
2341
2342 static void
2343 invalid_tls_insn (bfd *input_bfd,
2344 asection *input_section,
2345 Elf_Internal_Rela *rel)
2346 {
2347 reloc_howto_type *howto;
2348
2349 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2350 _bfd_error_handler
2351 /* xgettext:c-format */
2352 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2353 input_bfd,
2354 input_section,
2355 (long) rel->r_offset,
2356 howto->name);
2357 bfd_set_error (bfd_error_bad_value);
2358 }
2359
2360 /* Relocate a 390 ELF section. */
2361
2362 static bfd_boolean
2363 elf_s390_relocate_section (bfd *output_bfd,
2364 struct bfd_link_info *info,
2365 bfd *input_bfd,
2366 asection *input_section,
2367 bfd_byte *contents,
2368 Elf_Internal_Rela *relocs,
2369 Elf_Internal_Sym *local_syms,
2370 asection **local_sections)
2371 {
2372 struct elf_s390_link_hash_table *htab;
2373 Elf_Internal_Shdr *symtab_hdr;
2374 struct elf_link_hash_entry **sym_hashes;
2375 bfd_vma *local_got_offsets;
2376 Elf_Internal_Rela *rel;
2377 Elf_Internal_Rela *relend;
2378
2379 BFD_ASSERT (is_s390_elf (input_bfd));
2380
2381 htab = elf_s390_hash_table (info);
2382 symtab_hdr = &elf_symtab_hdr (input_bfd);
2383 sym_hashes = elf_sym_hashes (input_bfd);
2384 local_got_offsets = elf_local_got_offsets (input_bfd);
2385
2386 rel = relocs;
2387 relend = relocs + input_section->reloc_count;
2388 for (; rel < relend; rel++)
2389 {
2390 unsigned int r_type;
2391 reloc_howto_type *howto;
2392 unsigned long r_symndx;
2393 struct elf_link_hash_entry *h;
2394 Elf_Internal_Sym *sym;
2395 asection *sec;
2396 bfd_vma off;
2397 bfd_vma relocation;
2398 bfd_boolean unresolved_reloc;
2399 bfd_reloc_status_type r;
2400 int tls_type;
2401 asection *base_got = htab->elf.sgot;
2402
2403 r_type = ELF32_R_TYPE (rel->r_info);
2404 if (r_type == (int) R_390_GNU_VTINHERIT
2405 || r_type == (int) R_390_GNU_VTENTRY)
2406 continue;
2407 if (r_type >= (int) R_390_max)
2408 {
2409 bfd_set_error (bfd_error_bad_value);
2410 return FALSE;
2411 }
2412
2413 howto = elf_howto_table + r_type;
2414 r_symndx = ELF32_R_SYM (rel->r_info);
2415
2416 h = NULL;
2417 sym = NULL;
2418 sec = NULL;
2419 unresolved_reloc = FALSE;
2420 if (r_symndx < symtab_hdr->sh_info)
2421 {
2422 sym = local_syms + r_symndx;
2423 sec = local_sections[r_symndx];
2424 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2425 {
2426 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2427 if (local_plt == NULL)
2428 return FALSE;
2429
2430 /* Address of the PLT slot. */
2431 relocation = (htab->elf.iplt->output_section->vma
2432 + htab->elf.iplt->output_offset
2433 + local_plt[r_symndx].plt.offset);
2434
2435 switch (r_type)
2436 {
2437 case R_390_PLTOFF16:
2438 case R_390_PLTOFF32:
2439 relocation -= htab->elf.sgot->output_section->vma;
2440 break;
2441 case R_390_GOTPLT12:
2442 case R_390_GOTPLT16:
2443 case R_390_GOTPLT20:
2444 case R_390_GOTPLT32:
2445 case R_390_GOTPLTENT:
2446 case R_390_GOT12:
2447 case R_390_GOT16:
2448 case R_390_GOT20:
2449 case R_390_GOT32:
2450 case R_390_GOTENT:
2451 {
2452 /* Write the PLT slot address into the GOT slot. */
2453 bfd_put_32 (output_bfd, relocation,
2454 htab->elf.sgot->contents +
2455 local_got_offsets[r_symndx]);
2456 relocation = (local_got_offsets[r_symndx] +
2457 htab->elf.sgot->output_offset);
2458
2459 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2460 relocation += htab->elf.sgot->output_section->vma;
2461 break;
2462 }
2463 default:
2464 break;
2465 }
2466 /* The output section is needed later in
2467 finish_dynamic_section when creating the dynamic
2468 relocation. */
2469 local_plt[r_symndx].sec = sec;
2470 goto do_relocation;
2471 }
2472 else
2473 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2474 }
2475 else
2476 {
2477 bfd_boolean warned ATTRIBUTE_UNUSED;
2478 bfd_boolean ignored ATTRIBUTE_UNUSED;
2479
2480 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2481 r_symndx, symtab_hdr, sym_hashes,
2482 h, sec, relocation,
2483 unresolved_reloc, warned, ignored);
2484 }
2485
2486 if (sec != NULL && discarded_section (sec))
2487 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2488 rel, 1, relend, howto, 0, contents);
2489
2490 if (bfd_link_relocatable (info))
2491 continue;
2492
2493 switch (r_type)
2494 {
2495 case R_390_GOTPLT12:
2496 case R_390_GOTPLT16:
2497 case R_390_GOTPLT20:
2498 case R_390_GOTPLT32:
2499 case R_390_GOTPLTENT:
2500 /* There are three cases for a GOTPLT relocation. 1) The
2501 relocation is against the jump slot entry of a plt that
2502 will get emitted to the output file. 2) The relocation
2503 is against the jump slot of a plt entry that has been
2504 removed. elf_s390_adjust_gotplt has created a GOT entry
2505 as replacement. 3) The relocation is against a local symbol.
2506 Cases 2) and 3) are the same as the GOT relocation code
2507 so we just have to test for case 1 and fall through for
2508 the other two. */
2509 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2510 {
2511 bfd_vma plt_index;
2512
2513 if (s390_is_ifunc_symbol_p (h))
2514 {
2515 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2516 relocation = (plt_index * GOT_ENTRY_SIZE +
2517 htab->elf.igotplt->output_offset);
2518 if (r_type == R_390_GOTPLTENT)
2519 relocation += htab->elf.igotplt->output_section->vma;
2520 }
2521 else
2522 {
2523 /* Calc. index no.
2524 Current offset - size first entry / entry size. */
2525 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2526 PLT_ENTRY_SIZE;
2527
2528 /* Offset in GOT is PLT index plus GOT headers(3)
2529 times 4, addr & GOT addr. */
2530 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2531 if (r_type == R_390_GOTPLTENT)
2532 relocation += htab->elf.sgot->output_section->vma;
2533 }
2534 unresolved_reloc = FALSE;
2535
2536 }
2537 /* Fall through. */
2538
2539 case R_390_GOT12:
2540 case R_390_GOT16:
2541 case R_390_GOT20:
2542 case R_390_GOT32:
2543 case R_390_GOTENT:
2544 /* Relocation is to the entry for this symbol in the global
2545 offset table. */
2546 if (base_got == NULL)
2547 abort ();
2548
2549 if (h != NULL)
2550 {
2551 bfd_boolean dyn;
2552
2553 off = h->got.offset;
2554 dyn = htab->elf.dynamic_sections_created;
2555
2556 if (s390_is_ifunc_symbol_p (h))
2557 {
2558 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2559 if (off == (bfd_vma)-1)
2560 {
2561 /* No explicit GOT usage so redirect to the
2562 got.iplt slot. */
2563 base_got = htab->elf.igotplt;
2564 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2565 }
2566 else
2567 {
2568 /* Explicit GOT slots must contain the address
2569 of the PLT slot. This will be handled in
2570 finish_dynamic_symbol. */
2571 }
2572 }
2573 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2574 bfd_link_pic (info),
2575 h)
2576 || (bfd_link_pic (info)
2577 && SYMBOL_REFERENCES_LOCAL (info, h))
2578 || (ELF_ST_VISIBILITY (h->other)
2579 && h->root.type == bfd_link_hash_undefweak))
2580
2581 {
2582 /* This is actually a static link, or it is a
2583 -Bsymbolic link and the symbol is defined
2584 locally, or the symbol was forced to be local
2585 because of a version file. We must initialize
2586 this entry in the global offset table. Since the
2587 offset must always be a multiple of 2, we use the
2588 least significant bit to record whether we have
2589 initialized it already.
2590
2591 When doing a dynamic link, we create a .rel.got
2592 relocation entry to initialize the value. This
2593 is done in the finish_dynamic_symbol routine. */
2594 if ((off & 1) != 0)
2595 off &= ~1;
2596 else
2597 {
2598 bfd_put_32 (output_bfd, relocation,
2599 base_got->contents + off);
2600 h->got.offset |= 1;
2601 }
2602
2603 if ((h->def_regular
2604 && bfd_link_pic (info)
2605 && SYMBOL_REFERENCES_LOCAL (info, h))
2606 /* lrl rx,sym@GOTENT -> larl rx, sym */
2607 && ((r_type == R_390_GOTENT
2608 && (bfd_get_16 (input_bfd,
2609 contents + rel->r_offset - 2)
2610 & 0xff0f) == 0xc40d)
2611 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2612 || (r_type == R_390_GOT20
2613 && (bfd_get_32 (input_bfd,
2614 contents + rel->r_offset - 2)
2615 & 0xff00f000) == 0xe300c000
2616 && bfd_get_8 (input_bfd,
2617 contents + rel->r_offset + 3) == 0x58)))
2618 {
2619 unsigned short new_insn =
2620 (0xc000 | (bfd_get_8 (input_bfd,
2621 contents + rel->r_offset - 1) & 0xf0));
2622 bfd_put_16 (output_bfd, new_insn,
2623 contents + rel->r_offset - 2);
2624 r_type = R_390_PC32DBL;
2625 rel->r_addend = 2;
2626 howto = elf_howto_table + r_type;
2627 relocation = h->root.u.def.value
2628 + h->root.u.def.section->output_section->vma
2629 + h->root.u.def.section->output_offset;
2630 goto do_relocation;
2631 }
2632 }
2633 else
2634 unresolved_reloc = FALSE;
2635 }
2636 else
2637 {
2638 if (local_got_offsets == NULL)
2639 abort ();
2640
2641 off = local_got_offsets[r_symndx];
2642
2643 /* The offset must always be a multiple of 4. We use
2644 the least significant bit to record whether we have
2645 already generated the necessary reloc. */
2646 if ((off & 1) != 0)
2647 off &= ~1;
2648 else
2649 {
2650 bfd_put_32 (output_bfd, relocation,
2651 htab->elf.sgot->contents + off);
2652
2653 if (bfd_link_pic (info))
2654 {
2655 asection *srelgot;
2656 Elf_Internal_Rela outrel;
2657 bfd_byte *loc;
2658
2659 srelgot = htab->elf.srelgot;
2660 if (srelgot == NULL)
2661 abort ();
2662
2663 outrel.r_offset = (htab->elf.sgot->output_section->vma
2664 + htab->elf.sgot->output_offset
2665 + off);
2666 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2667 outrel.r_addend = relocation;
2668 loc = srelgot->contents;
2669 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2670 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2671 }
2672
2673 local_got_offsets[r_symndx] |= 1;
2674 }
2675 }
2676
2677 if (off >= (bfd_vma) -2)
2678 abort ();
2679
2680 relocation = base_got->output_offset + off;
2681
2682 /* For @GOTENT the relocation is against the offset between
2683 the instruction and the symbols entry in the GOT and not
2684 between the start of the GOT and the symbols entry. We
2685 add the vma of the GOT to get the correct value. */
2686 if ( r_type == R_390_GOTENT
2687 || r_type == R_390_GOTPLTENT)
2688 relocation += base_got->output_section->vma;
2689
2690 break;
2691
2692 case R_390_GOTOFF16:
2693 case R_390_GOTOFF32:
2694 /* Relocation is relative to the start of the global offset
2695 table. */
2696
2697 if (h != NULL
2698 && s390_is_ifunc_symbol_p (h)
2699 && h->def_regular
2700 && !bfd_link_executable (info))
2701 {
2702 relocation = (htab->elf.iplt->output_section->vma
2703 + htab->elf.iplt->output_offset
2704 + h->plt.offset
2705 - htab->elf.sgot->output_section->vma);
2706 goto do_relocation;
2707 }
2708
2709 /* Note that sgot->output_offset is not involved in this
2710 calculation. We always want the start of .got. If we
2711 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2712 permitted by the ABI, we might have to change this
2713 calculation. */
2714 relocation -= htab->elf.sgot->output_section->vma;
2715 break;
2716
2717 case R_390_GOTPC:
2718 case R_390_GOTPCDBL:
2719 /* Use global offset table as symbol value. */
2720 relocation = htab->elf.sgot->output_section->vma;
2721 unresolved_reloc = FALSE;
2722 break;
2723
2724 case R_390_PLT12DBL:
2725 case R_390_PLT16DBL:
2726 case R_390_PLT24DBL:
2727 case R_390_PLT32DBL:
2728 case R_390_PLT32:
2729 /* Relocation is to the entry for this symbol in the
2730 procedure linkage table. */
2731
2732 /* Resolve a PLT32 reloc against a local symbol directly,
2733 without using the procedure linkage table. */
2734 if (h == NULL)
2735 break;
2736
2737 if (h->plt.offset == (bfd_vma) -1
2738 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2739 {
2740 /* We didn't make a PLT entry for this symbol. This
2741 happens when statically linking PIC code, or when
2742 using -Bsymbolic. */
2743 break;
2744 }
2745
2746 if (s390_is_ifunc_symbol_p (h))
2747 relocation = (htab->elf.iplt->output_section->vma
2748 + htab->elf.iplt->output_offset
2749 + h->plt.offset);
2750 else
2751 relocation = (htab->elf.splt->output_section->vma
2752 + htab->elf.splt->output_offset
2753 + h->plt.offset);
2754 unresolved_reloc = FALSE;
2755 break;
2756
2757 case R_390_PLTOFF16:
2758 case R_390_PLTOFF32:
2759 /* Relocation is to the entry for this symbol in the
2760 procedure linkage table relative to the start of the GOT. */
2761
2762 /* For local symbols or if we didn't make a PLT entry for
2763 this symbol resolve the symbol directly. */
2764 if (h == NULL
2765 || h->plt.offset == (bfd_vma) -1
2766 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2767 {
2768 relocation -= htab->elf.sgot->output_section->vma;
2769 break;
2770 }
2771
2772 if (s390_is_ifunc_symbol_p (h))
2773 relocation = (htab->elf.iplt->output_section->vma
2774 + htab->elf.iplt->output_offset
2775 + h->plt.offset
2776 - htab->elf.sgot->output_section->vma);
2777 else
2778 relocation = (htab->elf.splt->output_section->vma
2779 + htab->elf.splt->output_offset
2780 + h->plt.offset
2781 - htab->elf.sgot->output_section->vma);
2782 unresolved_reloc = FALSE;
2783 break;
2784
2785 case R_390_PC16:
2786 case R_390_PC12DBL:
2787 case R_390_PC16DBL:
2788 case R_390_PC24DBL:
2789 case R_390_PC32DBL:
2790 case R_390_PC32:
2791 if (h != NULL
2792 && s390_is_ifunc_symbol_p (h)
2793 && h->def_regular
2794 && !bfd_link_executable (info))
2795 {
2796 /* This will not work our if the function does not
2797 happen to set up the GOT pointer for some other
2798 reason. 31 bit PLT entries require r12 to hold the
2799 GOT pointer.
2800 FIXME: Implement an errorcheck.
2801 NOTE: It will work when brasl is not available
2802 (e.g. with -m31 -march=g5) since a local function
2803 call then does use GOTOFF which implies r12 being set
2804 up. */
2805 relocation = (htab->elf.iplt->output_section->vma
2806 + htab->elf.iplt->output_offset
2807 + h ->plt.offset);
2808 goto do_relocation;
2809 }
2810 /* Fall through. */
2811
2812 case R_390_8:
2813 case R_390_16:
2814 case R_390_32:
2815 if (h != NULL
2816 && s390_is_ifunc_symbol_p (h)
2817 && h->def_regular)
2818 {
2819 if (!bfd_link_pic (info) || !h->non_got_ref)
2820 {
2821 /* For a non-shared object STT_GNU_IFUNC symbol must
2822 go through PLT. */
2823 relocation = (htab->elf.iplt->output_section->vma
2824 + htab->elf.iplt->output_offset
2825 + h ->plt.offset);
2826 goto do_relocation;
2827 }
2828 else
2829 {
2830 /* For shared objects a runtime relocation is needed. */
2831
2832 Elf_Internal_Rela outrel;
2833 asection *sreloc;
2834
2835 /* Need a dynamic relocation to get the real function
2836 address. */
2837 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2838 info,
2839 input_section,
2840 rel->r_offset);
2841 if (outrel.r_offset == (bfd_vma) -1
2842 || outrel.r_offset == (bfd_vma) -2)
2843 abort ();
2844
2845 outrel.r_offset += (input_section->output_section->vma
2846 + input_section->output_offset);
2847
2848 if (h->dynindx == -1
2849 || h->forced_local
2850 || bfd_link_executable (info))
2851 {
2852 /* This symbol is resolved locally. */
2853 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2854 outrel.r_addend = (h->root.u.def.value
2855 + h->root.u.def.section->output_section->vma
2856 + h->root.u.def.section->output_offset);
2857 }
2858 else
2859 {
2860 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2861 outrel.r_addend = 0;
2862 }
2863
2864 sreloc = htab->elf.irelifunc;
2865 elf_append_rela (output_bfd, sreloc, &outrel);
2866
2867 /* If this reloc is against an external symbol, we
2868 do not want to fiddle with the addend. Otherwise,
2869 we need to include the symbol value so that it
2870 becomes an addend for the dynamic reloc. For an
2871 internal symbol, we have updated addend. */
2872 continue;
2873 }
2874 }
2875
2876 if ((input_section->flags & SEC_ALLOC) == 0)
2877 break;
2878
2879 if ((bfd_link_pic (info)
2880 && (h == NULL
2881 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2882 || h->root.type != bfd_link_hash_undefweak)
2883 && ((r_type != R_390_PC16
2884 && r_type != R_390_PC12DBL
2885 && r_type != R_390_PC16DBL
2886 && r_type != R_390_PC24DBL
2887 && r_type != R_390_PC32DBL
2888 && r_type != R_390_PC32)
2889 || !SYMBOL_CALLS_LOCAL (info, h)))
2890 || (ELIMINATE_COPY_RELOCS
2891 && !bfd_link_pic (info)
2892 && h != NULL
2893 && h->dynindx != -1
2894 && !h->non_got_ref
2895 && ((h->def_dynamic
2896 && !h->def_regular)
2897 || h->root.type == bfd_link_hash_undefweak
2898 || h->root.type == bfd_link_hash_undefined)))
2899 {
2900 Elf_Internal_Rela outrel;
2901 bfd_boolean skip, relocate;
2902 asection *sreloc;
2903 bfd_byte *loc;
2904
2905 /* When generating a shared object, these relocations
2906 are copied into the output file to be resolved at run
2907 time. */
2908
2909 skip = FALSE;
2910 relocate = FALSE;
2911
2912 outrel.r_offset =
2913 _bfd_elf_section_offset (output_bfd, info, input_section,
2914 rel->r_offset);
2915 if (outrel.r_offset == (bfd_vma) -1)
2916 skip = TRUE;
2917 else if (outrel.r_offset == (bfd_vma) -2)
2918 skip = TRUE, relocate = TRUE;
2919 outrel.r_offset += (input_section->output_section->vma
2920 + input_section->output_offset);
2921
2922 if (skip)
2923 memset (&outrel, 0, sizeof outrel);
2924 else if (h != NULL
2925 && h->dynindx != -1
2926 && (r_type == R_390_PC16
2927 || r_type == R_390_PC12DBL
2928 || r_type == R_390_PC16DBL
2929 || r_type == R_390_PC24DBL
2930 || r_type == R_390_PC32DBL
2931 || r_type == R_390_PC32
2932 || !bfd_link_pic (info)
2933 || !SYMBOLIC_BIND (info, h)
2934 || !h->def_regular))
2935 {
2936 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2937 outrel.r_addend = rel->r_addend;
2938 }
2939 else
2940 {
2941 /* This symbol is local, or marked to become local. */
2942 outrel.r_addend = relocation + rel->r_addend;
2943 if (r_type == R_390_32)
2944 {
2945 relocate = TRUE;
2946 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2947 }
2948 else
2949 {
2950 long sindx;
2951
2952 if (bfd_is_abs_section (sec))
2953 sindx = 0;
2954 else if (sec == NULL || sec->owner == NULL)
2955 {
2956 bfd_set_error(bfd_error_bad_value);
2957 return FALSE;
2958 }
2959 else
2960 {
2961 asection *osec;
2962
2963 osec = sec->output_section;
2964 sindx = elf_section_data (osec)->dynindx;
2965 if (sindx == 0)
2966 {
2967 osec = htab->elf.text_index_section;
2968 sindx = elf_section_data (osec)->dynindx;
2969 }
2970 BFD_ASSERT (sindx != 0);
2971
2972 /* We are turning this relocation into one
2973 against a section symbol, so subtract out
2974 the output section's address but not the
2975 offset of the input section in the output
2976 section. */
2977 outrel.r_addend -= osec->vma;
2978 }
2979 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2980 }
2981 }
2982
2983 sreloc = elf_section_data (input_section)->sreloc;
2984 if (sreloc == NULL)
2985 abort ();
2986
2987 loc = sreloc->contents;
2988 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2989 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2990
2991 /* If this reloc is against an external symbol, we do
2992 not want to fiddle with the addend. Otherwise, we
2993 need to include the symbol value so that it becomes
2994 an addend for the dynamic reloc. */
2995 if (! relocate)
2996 continue;
2997 }
2998 break;
2999
3000 /* Relocations for tls literal pool entries. */
3001 case R_390_TLS_IE32:
3002 if (bfd_link_pic (info))
3003 {
3004 Elf_Internal_Rela outrel;
3005 asection *sreloc;
3006 bfd_byte *loc;
3007
3008 outrel.r_offset = rel->r_offset
3009 + input_section->output_section->vma
3010 + input_section->output_offset;
3011 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3012 sreloc = elf_section_data (input_section)->sreloc;
3013 if (sreloc == NULL)
3014 abort ();
3015 loc = sreloc->contents;
3016 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3017 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3018 }
3019 /* Fall through. */
3020
3021 case R_390_TLS_GD32:
3022 case R_390_TLS_GOTIE32:
3023 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
3024 tls_type = GOT_UNKNOWN;
3025 if (h == NULL && local_got_offsets)
3026 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3027 else if (h != NULL)
3028 {
3029 tls_type = elf_s390_hash_entry(h)->tls_type;
3030 if (!bfd_link_pic (info)
3031 && h->dynindx == -1
3032 && tls_type >= GOT_TLS_IE)
3033 r_type = R_390_TLS_LE32;
3034 }
3035 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
3036 r_type = R_390_TLS_IE32;
3037
3038 if (r_type == R_390_TLS_LE32)
3039 {
3040 /* This relocation gets optimized away by the local exec
3041 access optimization. */
3042 BFD_ASSERT (! unresolved_reloc);
3043 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3044 contents + rel->r_offset);
3045 continue;
3046 }
3047
3048 if (htab->elf.sgot == NULL)
3049 abort ();
3050
3051 if (h != NULL)
3052 off = h->got.offset;
3053 else
3054 {
3055 if (local_got_offsets == NULL)
3056 abort ();
3057
3058 off = local_got_offsets[r_symndx];
3059 }
3060
3061 emit_tls_relocs:
3062
3063 if ((off & 1) != 0)
3064 off &= ~1;
3065 else
3066 {
3067 Elf_Internal_Rela outrel;
3068 bfd_byte *loc;
3069 int dr_type, indx;
3070
3071 if (htab->elf.srelgot == NULL)
3072 abort ();
3073
3074 outrel.r_offset = (htab->elf.sgot->output_section->vma
3075 + htab->elf.sgot->output_offset + off);
3076
3077 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3078 if (r_type == R_390_TLS_GD32)
3079 dr_type = R_390_TLS_DTPMOD;
3080 else
3081 dr_type = R_390_TLS_TPOFF;
3082 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3083 outrel.r_addend = relocation - dtpoff_base (info);
3084 else
3085 outrel.r_addend = 0;
3086 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3087 loc = htab->elf.srelgot->contents;
3088 loc += htab->elf.srelgot->reloc_count++
3089 * sizeof (Elf32_External_Rela);
3090 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3091
3092 if (r_type == R_390_TLS_GD32)
3093 {
3094 if (indx == 0)
3095 {
3096 BFD_ASSERT (! unresolved_reloc);
3097 bfd_put_32 (output_bfd,
3098 relocation - dtpoff_base (info),
3099 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3100 }
3101 else
3102 {
3103 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3104 outrel.r_offset += GOT_ENTRY_SIZE;
3105 outrel.r_addend = 0;
3106 htab->elf.srelgot->reloc_count++;
3107 loc += sizeof (Elf32_External_Rela);
3108 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3109 }
3110 }
3111
3112 if (h != NULL)
3113 h->got.offset |= 1;
3114 else
3115 local_got_offsets[r_symndx] |= 1;
3116 }
3117
3118 if (off >= (bfd_vma) -2)
3119 abort ();
3120 if (r_type == ELF32_R_TYPE (rel->r_info))
3121 {
3122 relocation = htab->elf.sgot->output_offset + off;
3123 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3124 relocation += htab->elf.sgot->output_section->vma;
3125 unresolved_reloc = FALSE;
3126 }
3127 else
3128 {
3129 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3130 contents + rel->r_offset);
3131 continue;
3132 }
3133 break;
3134
3135 case R_390_TLS_GOTIE12:
3136 case R_390_TLS_GOTIE20:
3137 case R_390_TLS_IEENT:
3138 if (h == NULL)
3139 {
3140 if (local_got_offsets == NULL)
3141 abort();
3142 off = local_got_offsets[r_symndx];
3143 if (bfd_link_pic (info))
3144 goto emit_tls_relocs;
3145 }
3146 else
3147 {
3148 off = h->got.offset;
3149 tls_type = elf_s390_hash_entry(h)->tls_type;
3150 if (bfd_link_pic (info)
3151 || h->dynindx != -1
3152 || tls_type < GOT_TLS_IE)
3153 goto emit_tls_relocs;
3154 }
3155
3156 if (htab->elf.sgot == NULL)
3157 abort ();
3158
3159 BFD_ASSERT (! unresolved_reloc);
3160 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3161 htab->elf.sgot->contents + off);
3162 relocation = htab->elf.sgot->output_offset + off;
3163 if (r_type == R_390_TLS_IEENT)
3164 relocation += htab->elf.sgot->output_section->vma;
3165 unresolved_reloc = FALSE;
3166 break;
3167
3168 case R_390_TLS_LDM32:
3169 if (! bfd_link_pic (info))
3170 /* The literal pool entry this relocation refers to gets ignored
3171 by the optimized code of the local exec model. Do nothing
3172 and the value will turn out zero. */
3173 continue;
3174
3175 if (htab->elf.sgot == NULL)
3176 abort ();
3177
3178 off = htab->tls_ldm_got.offset;
3179 if (off & 1)
3180 off &= ~1;
3181 else
3182 {
3183 Elf_Internal_Rela outrel;
3184 bfd_byte *loc;
3185
3186 if (htab->elf.srelgot == NULL)
3187 abort ();
3188
3189 outrel.r_offset = (htab->elf.sgot->output_section->vma
3190 + htab->elf.sgot->output_offset + off);
3191
3192 bfd_put_32 (output_bfd, 0,
3193 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3194 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3195 outrel.r_addend = 0;
3196 loc = htab->elf.srelgot->contents;
3197 loc += htab->elf.srelgot->reloc_count++
3198 * sizeof (Elf32_External_Rela);
3199 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3200 htab->tls_ldm_got.offset |= 1;
3201 }
3202 relocation = htab->elf.sgot->output_offset + off;
3203 unresolved_reloc = FALSE;
3204 break;
3205
3206 case R_390_TLS_LE32:
3207 if (bfd_link_dll (info))
3208 {
3209 /* Linking a shared library with non-fpic code requires
3210 a R_390_TLS_TPOFF relocation. */
3211 Elf_Internal_Rela outrel;
3212 asection *sreloc;
3213 bfd_byte *loc;
3214 int indx;
3215
3216 outrel.r_offset = rel->r_offset
3217 + input_section->output_section->vma
3218 + input_section->output_offset;
3219 if (h != NULL && h->dynindx != -1)
3220 indx = h->dynindx;
3221 else
3222 indx = 0;
3223 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3224 if (indx == 0)
3225 outrel.r_addend = relocation - dtpoff_base (info);
3226 else
3227 outrel.r_addend = 0;
3228 sreloc = elf_section_data (input_section)->sreloc;
3229 if (sreloc == NULL)
3230 abort ();
3231 loc = sreloc->contents;
3232 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3233 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3234 }
3235 else
3236 {
3237 BFD_ASSERT (! unresolved_reloc);
3238 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3239 contents + rel->r_offset);
3240 }
3241 continue;
3242
3243 case R_390_TLS_LDO32:
3244 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3245 relocation -= dtpoff_base (info);
3246 else
3247 /* When converting LDO to LE, we must negate. */
3248 relocation = -tpoff (info, relocation);
3249 break;
3250
3251 /* Relocations for tls instructions. */
3252 case R_390_TLS_LOAD:
3253 case R_390_TLS_GDCALL:
3254 case R_390_TLS_LDCALL:
3255 tls_type = GOT_UNKNOWN;
3256 if (h == NULL && local_got_offsets)
3257 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3258 else if (h != NULL)
3259 tls_type = elf_s390_hash_entry(h)->tls_type;
3260
3261 if (tls_type == GOT_TLS_GD)
3262 continue;
3263
3264 if (r_type == R_390_TLS_LOAD)
3265 {
3266 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3267 {
3268 /* IE->LE transition. Four valid cases:
3269 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3270 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3271 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3272 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3273 unsigned int insn, ry;
3274
3275 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3276 ry = 0;
3277 if ((insn & 0xff00f000) == 0x58000000)
3278 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3279 ry = (insn & 0x000f0000);
3280 else if ((insn & 0xff0f0000) == 0x58000000)
3281 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3282 ry = (insn & 0x0000f000) << 4;
3283 else if ((insn & 0xff00f000) == 0x5800c000)
3284 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3285 ry = (insn & 0x000f0000);
3286 else if ((insn & 0xff0f0000) == 0x580c0000)
3287 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3288 ry = (insn & 0x0000f000) << 4;
3289 else
3290 invalid_tls_insn (input_bfd, input_section, rel);
3291 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3292 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3293 }
3294 }
3295 else if (r_type == R_390_TLS_GDCALL)
3296 {
3297 unsigned int insn;
3298
3299 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3300 if ((insn & 0xff000fff) != 0x4d000000 &&
3301 (insn & 0xffff0000) != 0xc0e50000 &&
3302 (insn & 0xff000000) != 0x0d000000)
3303 invalid_tls_insn (input_bfd, input_section, rel);
3304 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3305 {
3306 if ((insn & 0xff000000) == 0x0d000000)
3307 {
3308 /* GD->LE transition.
3309 basr rx, ry -> nopr r7 */
3310 insn = 0x07070000 | (insn & 0xffff);
3311 }
3312 else if ((insn & 0xff000000) == 0x4d000000)
3313 {
3314 /* GD->LE transition.
3315 bas %r14,0(%rx,%r13) -> bc 0,0 */
3316 insn = 0x47000000;
3317 }
3318 else
3319 {
3320 /* GD->LE transition.
3321 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3322 insn = 0xc0040000;
3323 bfd_put_16 (output_bfd, 0x0000,
3324 contents + rel->r_offset + 4);
3325 }
3326 }
3327 else
3328 {
3329 /* If basr is used in the pic case to invoke
3330 _tls_get_offset, something went wrong before. */
3331 if ((insn & 0xff000000) == 0x0d000000)
3332 invalid_tls_insn (input_bfd, input_section, rel);
3333
3334 if ((insn & 0xff000000) == 0x4d000000)
3335 {
3336 /* GD->IE transition.
3337 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3338 insn = 0x5822c000;
3339 }
3340 else
3341 {
3342 /* GD->IE transition.
3343 brasl %r14,__tls_get_addr@plt ->
3344 l %r2,0(%r2,%r12) ; bcr 0,0 */
3345 insn = 0x5822c000;
3346 bfd_put_16 (output_bfd, 0x0700,
3347 contents + rel->r_offset + 4);
3348 }
3349 }
3350 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3351 }
3352 else if (r_type == R_390_TLS_LDCALL)
3353 {
3354 if (!bfd_link_pic (info))
3355 {
3356 unsigned int insn;
3357
3358 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3359 if ((insn & 0xff000fff) != 0x4d000000 &&
3360 (insn & 0xffff0000) != 0xc0e50000 &&
3361 (insn & 0xff000000) != 0x0d000000)
3362 invalid_tls_insn (input_bfd, input_section, rel);
3363
3364 if ((insn & 0xff000000) == 0x0d000000)
3365 {
3366 /* LD->LE transition.
3367 basr rx, ry -> nopr r7 */
3368 insn = 0x07070000 | (insn & 0xffff);
3369 }
3370 else if ((insn & 0xff000000) == 0x4d000000)
3371 {
3372 /* LD->LE transition.
3373 bas %r14,0(%rx,%r13) -> bc 0,0 */
3374 insn = 0x47000000;
3375 }
3376 else
3377 {
3378 /* LD->LE transition.
3379 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3380 insn = 0xc0040000;
3381 bfd_put_16 (output_bfd, 0x0000,
3382 contents + rel->r_offset + 4);
3383 }
3384 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3385 }
3386 }
3387 continue;
3388
3389 default:
3390 break;
3391 }
3392
3393 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3394 because such sections are not SEC_ALLOC and thus ld.so will
3395 not process them. */
3396 if (unresolved_reloc
3397 && !((input_section->flags & SEC_DEBUGGING) != 0
3398 && h->def_dynamic)
3399 && _bfd_elf_section_offset (output_bfd, info, input_section,
3400 rel->r_offset) != (bfd_vma) -1)
3401 _bfd_error_handler
3402 /* xgettext:c-format */
3403 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3404 input_bfd,
3405 input_section,
3406 (long) rel->r_offset,
3407 howto->name,
3408 h->root.root.string);
3409
3410 do_relocation:
3411
3412 /* When applying a 24 bit reloc we need to start one byte
3413 earlier. Otherwise the 32 bit get/put bfd operations might
3414 access a byte after the actual section. */
3415 if (r_type == R_390_PC24DBL
3416 || r_type == R_390_PLT24DBL)
3417 rel->r_offset--;
3418
3419 if (r_type == R_390_20
3420 || r_type == R_390_GOT20
3421 || r_type == R_390_GOTPLT20
3422 || r_type == R_390_TLS_GOTIE20)
3423 {
3424 relocation += rel->r_addend;
3425 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3426 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3427 contents, rel->r_offset,
3428 relocation, 0);
3429 }
3430 else
3431 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3432 contents, rel->r_offset,
3433 relocation, rel->r_addend);
3434
3435 if (r != bfd_reloc_ok)
3436 {
3437 const char *name;
3438
3439 if (h != NULL)
3440 name = h->root.root.string;
3441 else
3442 {
3443 name = bfd_elf_string_from_elf_section (input_bfd,
3444 symtab_hdr->sh_link,
3445 sym->st_name);
3446 if (name == NULL)
3447 return FALSE;
3448 if (*name == '\0')
3449 name = bfd_section_name (input_bfd, sec);
3450 }
3451
3452 if (r == bfd_reloc_overflow)
3453 (*info->callbacks->reloc_overflow)
3454 (info, (h ? &h->root : NULL), name, howto->name,
3455 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3456 else
3457 {
3458 _bfd_error_handler
3459 /* xgettext:c-format */
3460 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3461 input_bfd, input_section,
3462 (long) rel->r_offset, name, (int) r);
3463 return FALSE;
3464 }
3465 }
3466 }
3467
3468 return TRUE;
3469 }
3470
3471 /* Generate the PLT slots together with the dynamic relocations needed
3472 for IFUNC symbols. */
3473
3474 static void
3475 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3476 struct bfd_link_info *info,
3477 struct elf_link_hash_entry *h,
3478 struct elf_s390_link_hash_table *htab,
3479 bfd_vma iplt_offset,
3480 bfd_vma resolver_address)
3481 {
3482 bfd_vma iplt_index;
3483 bfd_vma got_offset;
3484 bfd_vma igotiplt_offset;
3485 Elf_Internal_Rela rela;
3486 bfd_byte *loc;
3487 asection *plt, *gotplt, *relplt;
3488 bfd_vma relative_offset;
3489
3490 if (htab->elf.iplt == NULL
3491 || htab->elf.igotplt == NULL
3492 || htab->elf.irelplt == NULL)
3493 abort ();
3494
3495 gotplt = htab->elf.igotplt;
3496 relplt = htab->elf.irelplt;
3497
3498 /* Index of the PLT slot within iplt section. */
3499 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3500 plt = htab->elf.iplt;
3501 /* Offset into the igot.plt section. */
3502 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3503 /* Offset into the got section. */
3504 got_offset = igotiplt_offset + gotplt->output_offset;
3505
3506 /* S390 uses halfwords for relative branch calc! */
3507 relative_offset = - (plt->output_offset +
3508 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3509 /* If offset is > 32768, branch to a previous branch
3510 390 can only handle +-64 K jumps. */
3511 if ( -32768 > (int) relative_offset )
3512 relative_offset
3513 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3514
3515 /* Fill in the entry in the procedure linkage table. */
3516 if (!bfd_link_pic (info))
3517 {
3518 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3519 PLT_ENTRY_SIZE);
3520
3521 /* Adjust jump to the first plt entry. */
3522 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3523 plt->contents + iplt_offset + 20);
3524
3525 /* Push the GOT offset field. */
3526 bfd_put_32 (output_bfd,
3527 (gotplt->output_section->vma
3528 + got_offset),
3529 plt->contents + iplt_offset + 24);
3530 }
3531 else if (got_offset < 4096)
3532 {
3533 /* The GOT offset is small enough to be used directly as
3534 displacement. */
3535 memcpy (plt->contents + iplt_offset,
3536 elf_s390_plt_pic12_entry,
3537 PLT_ENTRY_SIZE);
3538
3539 /* Put in the GOT offset as displacement value. The 0xc000
3540 value comes from the first word of the plt entry. Look
3541 at the elf_s390_plt_pic16_entry content. */
3542 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3543 plt->contents + iplt_offset + 2);
3544
3545 /* Adjust the jump to the first plt entry. */
3546 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3547 plt->contents + iplt_offset + 20);
3548 }
3549 else if (got_offset < 32768)
3550 {
3551 /* The GOT offset is too big for a displacement but small
3552 enough to be a signed 16 bit immediate value as it can be
3553 used in an lhi instruction. */
3554 memcpy (plt->contents + iplt_offset,
3555 elf_s390_plt_pic16_entry,
3556 PLT_ENTRY_SIZE);
3557
3558 /* Put in the GOT offset for the lhi instruction. */
3559 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3560 plt->contents + iplt_offset + 2);
3561
3562 /* Adjust the jump to the first plt entry. */
3563 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3564 plt->contents + iplt_offset + 20);
3565 }
3566 else
3567 {
3568 memcpy (plt->contents + iplt_offset,
3569 elf_s390_plt_pic_entry,
3570 PLT_ENTRY_SIZE);
3571
3572 /* Adjust the jump to the first plt entry. */
3573 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3574 plt->contents + iplt_offset + 20);
3575
3576 /* Push the GOT offset field. */
3577 bfd_put_32 (output_bfd, got_offset,
3578 plt->contents + iplt_offset + 24);
3579 }
3580 /* Insert offset into reloc. table here. */
3581 bfd_put_32 (output_bfd, relplt->output_offset +
3582 iplt_index * RELA_ENTRY_SIZE,
3583 plt->contents + iplt_offset + 28);
3584
3585 /* Fill in the entry in the global offset table.
3586 Points to instruction after GOT offset. */
3587 bfd_put_32 (output_bfd,
3588 (plt->output_section->vma
3589 + plt->output_offset
3590 + iplt_offset
3591 + 12),
3592 gotplt->contents + igotiplt_offset);
3593
3594 /* Fill in the entry in the .rela.plt section. */
3595 rela.r_offset = gotplt->output_section->vma + got_offset;
3596
3597 if (!h
3598 || h->dynindx == -1
3599 || ((bfd_link_executable (info)
3600 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3601 && h->def_regular))
3602 {
3603 /* The symbol can be locally resolved. */
3604 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3605 rela.r_addend = resolver_address;
3606 }
3607 else
3608 {
3609 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3610 rela.r_addend = 0;
3611 }
3612
3613 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3614 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3615 }
3616
3617 /* Finish up dynamic symbol handling. We set the contents of various
3618 dynamic sections here. */
3619
3620 static bfd_boolean
3621 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3622 struct bfd_link_info *info,
3623 struct elf_link_hash_entry *h,
3624 Elf_Internal_Sym *sym)
3625 {
3626 struct elf_s390_link_hash_table *htab;
3627 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3628
3629 htab = elf_s390_hash_table (info);
3630
3631 if (h->plt.offset != (bfd_vma) -1)
3632 {
3633 bfd_vma plt_index;
3634 bfd_vma got_offset;
3635 Elf_Internal_Rela rela;
3636 bfd_byte *loc;
3637 bfd_vma relative_offset;
3638
3639 /* This symbol has an entry in the procedure linkage table. Set
3640 it up. */
3641 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3642 {
3643 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3644 htab, h->plt.offset,
3645 eh->ifunc_resolver_address +
3646 eh->ifunc_resolver_section->output_offset +
3647 eh->ifunc_resolver_section->output_section->vma);
3648 /* Do not return yet. Handling of explicit GOT slots of
3649 IFUNC symbols is below. */
3650 }
3651 else
3652 {
3653 if (h->dynindx == -1
3654 || htab->elf.splt == NULL
3655 || htab->elf.sgotplt == NULL
3656 || htab->elf.srelplt == NULL)
3657 abort ();
3658
3659 /* Calc. index no.
3660 Current offset - size first entry / entry size. */
3661 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3662
3663 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3664 addr & GOT addr. */
3665 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3666
3667 /* S390 uses halfwords for relative branch calc! */
3668 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3669 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3670 /* If offset is > 32768, branch to a previous branch
3671 390 can only handle +-64 K jumps. */
3672 if ( -32768 > (int) relative_offset )
3673 relative_offset
3674 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3675
3676 /* Fill in the entry in the procedure linkage table. */
3677 if (!bfd_link_pic (info))
3678 {
3679 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3680 PLT_ENTRY_SIZE);
3681
3682 /* Adjust 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 /* Push the GOT offset field. */
3687 bfd_put_32 (output_bfd,
3688 (htab->elf.sgotplt->output_section->vma
3689 + htab->elf.sgotplt->output_offset
3690 + got_offset),
3691 htab->elf.splt->contents + h->plt.offset + 24);
3692 }
3693 else if (got_offset < 4096)
3694 {
3695 /* The GOT offset is small enough to be used directly as
3696 displacement. */
3697 memcpy (htab->elf.splt->contents + h->plt.offset,
3698 elf_s390_plt_pic12_entry,
3699 PLT_ENTRY_SIZE);
3700
3701 /* Put in the GOT offset as displacement value. The 0xc000
3702 value comes from the first word of the plt entry. Look
3703 at the elf_s390_plt_pic12_entry content. */
3704 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3705 htab->elf.splt->contents + h->plt.offset + 2);
3706
3707 /* Adjust the jump to the first plt entry. */
3708 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3709 htab->elf.splt->contents + h->plt.offset + 20);
3710 }
3711 else if (got_offset < 32768)
3712 {
3713 /* The GOT offset is too big for a displacement but small
3714 enough to be a signed 16 bit immediate value as it can be
3715 used in an lhi instruction. */
3716 memcpy (htab->elf.splt->contents + h->plt.offset,
3717 elf_s390_plt_pic16_entry,
3718 PLT_ENTRY_SIZE);
3719
3720 /* Put in the GOT offset for the lhi instruction. */
3721 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3722 htab->elf.splt->contents + h->plt.offset + 2);
3723
3724 /* Adjust the jump to the first plt entry. */
3725 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3726 htab->elf.splt->contents + h->plt.offset + 20);
3727 }
3728 else
3729 {
3730 memcpy (htab->elf.splt->contents + h->plt.offset,
3731 elf_s390_plt_pic_entry,
3732 PLT_ENTRY_SIZE);
3733
3734 /* Adjust the jump to the first plt entry. */
3735 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3736 htab->elf.splt->contents + h->plt.offset + 20);
3737
3738 /* Push the GOT offset field. */
3739 bfd_put_32 (output_bfd, got_offset,
3740 htab->elf.splt->contents + h->plt.offset + 24);
3741 }
3742 /* Insert offset into reloc. table here. */
3743 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3744 htab->elf.splt->contents + h->plt.offset + 28);
3745
3746 /* Fill in the entry in the global offset table.
3747 Points to instruction after GOT offset. */
3748 bfd_put_32 (output_bfd,
3749 (htab->elf.splt->output_section->vma
3750 + htab->elf.splt->output_offset
3751 + h->plt.offset
3752 + 12),
3753 htab->elf.sgotplt->contents + got_offset);
3754
3755 /* Fill in the entry in the .rela.plt section. */
3756 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3757 + htab->elf.sgotplt->output_offset
3758 + got_offset);
3759 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3760 rela.r_addend = 0;
3761 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3762 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3763
3764 if (!h->def_regular)
3765 {
3766 /* Mark the symbol as undefined, rather than as defined in
3767 the .plt section. Leave the value alone. This is a clue
3768 for the dynamic linker, to make function pointer
3769 comparisons work between an application and shared
3770 library. */
3771 sym->st_shndx = SHN_UNDEF;
3772 }
3773 }
3774 }
3775
3776 if (h->got.offset != (bfd_vma) -1
3777 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3778 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3779 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3780 {
3781 Elf_Internal_Rela rela;
3782 bfd_byte *loc;
3783
3784 /* This symbol has an entry in the global offset table. Set it
3785 up. */
3786
3787 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3788 abort ();
3789
3790 rela.r_offset = (htab->elf.sgot->output_section->vma
3791 + htab->elf.sgot->output_offset
3792 + (h->got.offset &~ (bfd_vma) 1));
3793
3794 /* If this is a static link, or it is a -Bsymbolic link and the
3795 symbol is defined locally or was forced to be local because
3796 of a version file, we just want to emit a RELATIVE reloc.
3797 The entry in the global offset table will already have been
3798 initialized in the relocate_section function. */
3799 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3800 {
3801 if (bfd_link_pic (info))
3802 {
3803 /* An explicit GOT slot usage needs GLOB_DAT. If the
3804 symbol references local the implicit got.iplt slot
3805 will be used and the IRELATIVE reloc has been created
3806 above. */
3807 goto do_glob_dat;
3808 }
3809 else
3810 {
3811 /* For non-shared objects explicit GOT slots must be
3812 filled with the PLT slot address for pointer
3813 equality reasons. */
3814 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3815 + htab->elf.iplt->output_offset
3816 + h->plt.offset),
3817 htab->elf.sgot->contents + h->got.offset);
3818 return TRUE;
3819 }
3820 }
3821 else if (bfd_link_pic (info)
3822 && SYMBOL_REFERENCES_LOCAL (info, h))
3823 {
3824 /* If this is a static link, or it is a -Bsymbolic link and
3825 the symbol is defined locally or was forced to be local
3826 because of a version file, we just want to emit a
3827 RELATIVE reloc. The entry in the global offset table
3828 will already have been initialized in the
3829 relocate_section function. */
3830 if (!h->def_regular)
3831 return FALSE;
3832 BFD_ASSERT((h->got.offset & 1) != 0);
3833 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3834 rela.r_addend = (h->root.u.def.value
3835 + h->root.u.def.section->output_section->vma
3836 + h->root.u.def.section->output_offset);
3837 }
3838 else
3839 {
3840 BFD_ASSERT((h->got.offset & 1) == 0);
3841 do_glob_dat:
3842 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3843 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3844 rela.r_addend = 0;
3845 }
3846
3847 loc = htab->elf.srelgot->contents;
3848 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3849 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3850 }
3851
3852 if (h->needs_copy)
3853 {
3854 Elf_Internal_Rela rela;
3855 bfd_byte *loc;
3856
3857 /* This symbols needs a copy reloc. Set it up. */
3858
3859 if (h->dynindx == -1
3860 || (h->root.type != bfd_link_hash_defined
3861 && h->root.type != bfd_link_hash_defweak)
3862 || htab->srelbss == NULL)
3863 abort ();
3864
3865 rela.r_offset = (h->root.u.def.value
3866 + h->root.u.def.section->output_section->vma
3867 + h->root.u.def.section->output_offset);
3868 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3869 rela.r_addend = 0;
3870 loc = htab->srelbss->contents;
3871 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3872 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3873 }
3874
3875 /* Mark some specially defined symbols as absolute. */
3876 if (h == htab->elf.hdynamic
3877 || h == htab->elf.hgot
3878 || h == htab->elf.hplt)
3879 sym->st_shndx = SHN_ABS;
3880
3881 return TRUE;
3882 }
3883
3884 /* Used to decide how to sort relocs in an optimal manner for the
3885 dynamic linker, before writing them out. */
3886
3887 static enum elf_reloc_type_class
3888 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3889 const asection *rel_sec ATTRIBUTE_UNUSED,
3890 const Elf_Internal_Rela *rela)
3891 {
3892 bfd *abfd = info->output_bfd;
3893 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3894 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3895 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3896 Elf_Internal_Sym sym;
3897
3898 if (htab->elf.dynsym == NULL
3899 || !bed->s->swap_symbol_in (abfd,
3900 (htab->elf.dynsym->contents
3901 + r_symndx * bed->s->sizeof_sym),
3902 0, &sym))
3903 abort ();
3904
3905 /* Check relocation against STT_GNU_IFUNC symbol. */
3906 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3907 return reloc_class_ifunc;
3908
3909 switch ((int) ELF32_R_TYPE (rela->r_info))
3910 {
3911 case R_390_RELATIVE:
3912 return reloc_class_relative;
3913 case R_390_JMP_SLOT:
3914 return reloc_class_plt;
3915 case R_390_COPY:
3916 return reloc_class_copy;
3917 default:
3918 return reloc_class_normal;
3919 }
3920 }
3921
3922 /* Finish up the dynamic sections. */
3923
3924 static bfd_boolean
3925 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3926 struct bfd_link_info *info)
3927 {
3928 struct elf_s390_link_hash_table *htab;
3929 bfd *dynobj;
3930 asection *sdyn;
3931 bfd *ibfd;
3932 unsigned int i;
3933
3934 htab = elf_s390_hash_table (info);
3935 dynobj = htab->elf.dynobj;
3936 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3937
3938 if (htab->elf.dynamic_sections_created)
3939 {
3940 Elf32_External_Dyn *dyncon, *dynconend;
3941
3942 if (sdyn == NULL || htab->elf.sgot == NULL)
3943 abort ();
3944
3945 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3946 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3947 for (; dyncon < dynconend; dyncon++)
3948 {
3949 Elf_Internal_Dyn dyn;
3950 asection *s;
3951
3952 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3953
3954 switch (dyn.d_tag)
3955 {
3956 default:
3957 continue;
3958
3959 case DT_PLTGOT:
3960 s = htab->elf.sgotplt;
3961 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3962 break;
3963
3964 case DT_JMPREL:
3965 s = htab->elf.srelplt;
3966 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3967 break;
3968
3969 case DT_PLTRELSZ:
3970 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3971 break;
3972 }
3973
3974 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3975 }
3976
3977 /* Fill in the special first entry in the procedure linkage table. */
3978 if (htab->elf.splt && htab->elf.splt->size > 0)
3979 {
3980 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3981 if (bfd_link_pic (info))
3982 {
3983 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3984 PLT_FIRST_ENTRY_SIZE);
3985 }
3986 else
3987 {
3988 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3989 PLT_FIRST_ENTRY_SIZE);
3990 bfd_put_32 (output_bfd,
3991 htab->elf.sgotplt->output_section->vma
3992 + htab->elf.sgotplt->output_offset,
3993 htab->elf.splt->contents + 24);
3994 }
3995 elf_section_data (htab->elf.splt->output_section)
3996 ->this_hdr.sh_entsize = 4;
3997 }
3998
3999 }
4000
4001 if (htab->elf.sgotplt)
4002 {
4003 /* Fill in the first three entries in the global offset table. */
4004 if (htab->elf.sgotplt->size > 0)
4005 {
4006 bfd_put_32 (output_bfd,
4007 (sdyn == NULL ? (bfd_vma) 0
4008 : sdyn->output_section->vma + sdyn->output_offset),
4009 htab->elf.sgotplt->contents);
4010 /* One entry for shared object struct ptr. */
4011 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
4012 /* One entry for _dl_runtime_resolve. */
4013 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
4014 }
4015
4016 elf_section_data (htab->elf.sgotplt->output_section)
4017 ->this_hdr.sh_entsize = 4;
4018 }
4019 /* Finish dynamic symbol for local IFUNC symbols. */
4020 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4021 {
4022 struct plt_entry *local_plt;
4023 Elf_Internal_Sym *isym;
4024 Elf_Internal_Shdr *symtab_hdr;
4025
4026 symtab_hdr = &elf_symtab_hdr (ibfd);
4027
4028 local_plt = elf_s390_local_plt (ibfd);
4029 if (local_plt != NULL)
4030 for (i = 0; i < symtab_hdr->sh_info; i++)
4031 {
4032 if (local_plt[i].plt.offset != (bfd_vma) -1)
4033 {
4034 asection *sec = local_plt[i].sec;
4035 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
4036 if (isym == NULL)
4037 return FALSE;
4038
4039 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4040 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
4041 local_plt[i].plt.offset,
4042 isym->st_value
4043 + sec->output_section->vma
4044 + sec->output_offset);
4045
4046 }
4047 }
4048 }
4049 return TRUE;
4050 }
4051 \f
4052 /* Support for core dump NOTE sections. */
4053
4054 static bfd_boolean
4055 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
4056 {
4057 int offset;
4058 unsigned int size;
4059
4060 switch (note->descsz)
4061 {
4062 default:
4063 return FALSE;
4064
4065 case 224: /* S/390 Linux. */
4066 /* pr_cursig */
4067 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4068
4069 /* pr_pid */
4070 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
4071
4072 /* pr_reg */
4073 offset = 72;
4074 size = 144;
4075 break;
4076 }
4077
4078 /* Make a ".reg/999" section. */
4079 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4080 size, note->descpos + offset);
4081 }
4082
4083 static bfd_boolean
4084 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
4085 {
4086 switch (note->descsz)
4087 {
4088 default:
4089 return FALSE;
4090
4091 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
4092 elf_tdata (abfd)->core->pid
4093 = bfd_get_32 (abfd, note->descdata + 12);
4094 elf_tdata (abfd)->core->program
4095 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
4096 elf_tdata (abfd)->core->command
4097 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
4098 break;
4099 }
4100
4101 /* Note that for some reason, a spurious space is tacked
4102 onto the end of the args in some (at least one anyway)
4103 implementations, so strip it off if it exists. */
4104
4105 {
4106 char *command = elf_tdata (abfd)->core->command;
4107 int n = strlen (command);
4108
4109 if (0 < n && command[n - 1] == ' ')
4110 command[n - 1] = '\0';
4111 }
4112
4113 return TRUE;
4114 }
4115
4116 static char *
4117 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
4118 int note_type, ...)
4119 {
4120 va_list ap;
4121
4122 switch (note_type)
4123 {
4124 default:
4125 return NULL;
4126
4127 case NT_PRPSINFO:
4128 {
4129 char data[124] = { 0 };
4130 const char *fname, *psargs;
4131
4132 va_start (ap, note_type);
4133 fname = va_arg (ap, const char *);
4134 psargs = va_arg (ap, const char *);
4135 va_end (ap);
4136
4137 strncpy (data + 28, fname, 16);
4138 strncpy (data + 44, psargs, 80);
4139 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4140 &data, sizeof (data));
4141 }
4142
4143 case NT_PRSTATUS:
4144 {
4145 char data[224] = { 0 };
4146 long pid;
4147 int cursig;
4148 const void *gregs;
4149
4150 va_start (ap, note_type);
4151 pid = va_arg (ap, long);
4152 cursig = va_arg (ap, int);
4153 gregs = va_arg (ap, const void *);
4154 va_end (ap);
4155
4156 bfd_put_16 (abfd, cursig, data + 12);
4157 bfd_put_32 (abfd, pid, data + 24);
4158 memcpy (data + 72, gregs, 144);
4159 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4160 &data, sizeof (data));
4161 }
4162 }
4163 /* NOTREACHED */
4164 }
4165 \f
4166 /* Return address for Ith PLT stub in section PLT, for relocation REL
4167 or (bfd_vma) -1 if it should not be included. */
4168
4169 static bfd_vma
4170 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4171 const arelent *rel ATTRIBUTE_UNUSED)
4172 {
4173 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4174 }
4175
4176 /* Merge backend specific data from an object file to the output
4177 object file when linking. */
4178
4179 static bfd_boolean
4180 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4181 {
4182 bfd *obfd = info->output_bfd;
4183
4184 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4185 return TRUE;
4186
4187 if (!elf_s390_merge_obj_attributes (ibfd, info))
4188 return FALSE;
4189
4190 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4191 return TRUE;
4192 }
4193
4194
4195 #define TARGET_BIG_SYM s390_elf32_vec
4196 #define TARGET_BIG_NAME "elf32-s390"
4197 #define ELF_ARCH bfd_arch_s390
4198 #define ELF_TARGET_ID S390_ELF_DATA
4199 #define ELF_MACHINE_CODE EM_S390
4200 #define ELF_MACHINE_ALT1 EM_S390_OLD
4201 #define ELF_MAXPAGESIZE 0x1000
4202
4203 #define elf_backend_can_gc_sections 1
4204 #define elf_backend_can_refcount 1
4205 #define elf_backend_want_got_plt 1
4206 #define elf_backend_plt_readonly 1
4207 #define elf_backend_want_plt_sym 0
4208 #define elf_backend_got_header_size 12
4209 #define elf_backend_rela_normal 1
4210
4211 #define elf_info_to_howto elf_s390_info_to_howto
4212
4213 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4214 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4215 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4216 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4217
4218 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4219
4220 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4221 #define elf_backend_check_relocs elf_s390_check_relocs
4222 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4223 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4224 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4225 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4226 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4227 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4228 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4229 #define elf_backend_relocate_section elf_s390_relocate_section
4230 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4231 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4232 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4233 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4234 #define elf_backend_write_core_note elf_s390_write_core_note
4235 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4236 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4237 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4238
4239 #define bfd_elf32_mkobject elf_s390_mkobject
4240 #define elf_backend_object_p elf_s390_object_p
4241
4242 #include "elf32-target.h"
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