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Support x86 Intel MSR_IMM
[binutils-gdb.git] / bfd / elf32-s390.c
blob702b0239dd556d1d897c2e4c0ad0c2f9d7054a0f
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2024 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 0, /* size */
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, 1, 8, false, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", false, 0,0x000000ff, false),
57 HOWTO(R_390_12, 0, 2, 12, false, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", false, 0,0x00000fff, false),
59 HOWTO(R_390_16, 0, 2, 16, false, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", false, 0,0x0000ffff, false),
61 HOWTO(R_390_32, 0, 4, 32, false, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", false, 0,0xffffffff, false),
63 HOWTO(R_390_PC32, 0, 4, 32, true, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", false, 0,0xffffffff, true),
65 HOWTO(R_390_GOT12, 0, 2, 12, false, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", false, 0,0x00000fff, false),
67 HOWTO(R_390_GOT32, 0, 4, 32, false, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", false, 0,0xffffffff, false),
69 HOWTO(R_390_PLT32, 0, 4, 32, true, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", false, 0,0xffffffff, true),
71 HOWTO(R_390_COPY, 0, 4, 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, 4, 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, 4, 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, 4, 32, true, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", false, 0,0xffffffff, false),
79 HOWTO(R_390_GOTOFF32, 0, 4, 32, false, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", false, 0,0xffffffff, false),
81 HOWTO(R_390_GOTPC, 0, 4, 32, true, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,0xffffffff, true),
83 HOWTO(R_390_GOT16, 0, 2, 16, false, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", false, 0,0x0000ffff, false),
85 HOWTO(R_390_PC16, 0, 2, 16, true, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", false, 0,0x0000ffff, true),
87 HOWTO(R_390_PC16DBL, 1, 2, 16, true, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", false, 0,0x0000ffff, true),
89 HOWTO(R_390_PLT16DBL, 1, 2, 16, true, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true),
91 HOWTO(R_390_PC32DBL, 1, 4, 32, true, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", false, 0,0xffffffff, true),
93 HOWTO(R_390_PLT32DBL, 1, 4, 32, true, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", false, 0,0xffffffff, true),
95 HOWTO(R_390_GOTPCDBL, 1, 4, 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, 4, 32, true, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", false, 0,0xffffffff, true),
103 HOWTO(R_390_GOTOFF16, 0, 2, 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, 2, 12, false, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", false, 0,0x00000fff, false),
108 HOWTO(R_390_GOTPLT16, 0, 2, 16, false, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", false, 0,0x0000ffff, false),
110 HOWTO(R_390_GOTPLT32, 0, 4, 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, 4, 32, true, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",false, 0,0xffffffff, true),
115 HOWTO(R_390_PLTOFF16, 0, 2, 16, false, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", false, 0,0x0000ffff, false),
117 HOWTO(R_390_PLTOFF32, 0, 4, 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, 4, 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, 2, 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, 4, 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, 4, 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, 4, 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, 4, 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, 4, 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, 4, 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, 4, 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, 4, 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, 4, 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, 4, 20, false, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", false, 0,0x0fffff00, false),
156 HOWTO(R_390_GOT20, 0, 4, 20, false, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", false, 0,0x0fffff00, false),
158 HOWTO(R_390_GOTPLT20, 0, 4, 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, 4, 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, 4, 32, true, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", false, 0, 0xffffffff, false),
164 HOWTO(R_390_PC12DBL, 1, 2, 12, true, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", false, 0,0x00000fff, true),
166 HOWTO(R_390_PLT12DBL, 1, 2, 12, true, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", false, 0,0x00000fff, true),
168 HOWTO(R_390_PC24DBL, 1, 4, 24, true, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", false, 0,0x00ffffff, true),
170 HOWTO(R_390_PLT24DBL, 1, 4, 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, 0,4,0,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, 0,4,0,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 bool
327 elf_s390_info_to_howto (bfd *abfd,
328 arelent *cache_ptr,
329 Elf_Internal_Rela *dst)
330 {
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
332
333 switch (r_type)
334 {
335 case R_390_GNU_VTINHERIT:
336 cache_ptr->howto = &elf32_s390_vtinherit_howto;
337 break;
338
339 case R_390_GNU_VTENTRY:
340 cache_ptr->howto = &elf32_s390_vtentry_howto;
341 break;
342
343 default:
344 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
345 {
346 /* xgettext:c-format */
347 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
348 abfd, r_type);
349 bfd_set_error (bfd_error_bad_value);
350 return false;
351 }
352 cache_ptr->howto = &elf_howto_table[r_type];
353 }
354
355 return true;
356 }
357
358 /* A relocation function which doesn't do anything. */
359 static bfd_reloc_status_type
360 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
361 arelent *reloc_entry,
362 asymbol *symbol ATTRIBUTE_UNUSED,
363 void * data ATTRIBUTE_UNUSED,
364 asection *input_section,
365 bfd *output_bfd,
366 char **error_message ATTRIBUTE_UNUSED)
367 {
368 if (output_bfd)
369 reloc_entry->address += input_section->output_offset;
370 return bfd_reloc_ok;
371 }
372
373 /* Handle the large displacement relocs. */
374 static bfd_reloc_status_type
375 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
376 arelent *reloc_entry,
377 asymbol *symbol,
378 void * data ATTRIBUTE_UNUSED,
379 asection *input_section,
380 bfd *output_bfd,
381 char **error_message ATTRIBUTE_UNUSED)
382 {
383 reloc_howto_type *howto = reloc_entry->howto;
384 bfd_vma relocation;
385 bfd_vma insn;
386
387 if (output_bfd != (bfd *) NULL
388 && (symbol->flags & BSF_SECTION_SYM) == 0
389 && (! howto->partial_inplace
390 || reloc_entry->addend == 0))
391 {
392 reloc_entry->address += input_section->output_offset;
393 return bfd_reloc_ok;
394 }
395
396 if (output_bfd != NULL)
397 return bfd_reloc_continue;
398
399 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
400 return bfd_reloc_outofrange;
401
402 relocation = (symbol->value
403 + symbol->section->output_section->vma
404 + symbol->section->output_offset);
405 relocation += reloc_entry->addend;
406 if (howto->pc_relative)
407 {
408 relocation -= (input_section->output_section->vma
409 + input_section->output_offset);
410 relocation -= reloc_entry->address;
411 }
412
413 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
414 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
415 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
416
417 if ((bfd_signed_vma) relocation < - 0x80000
418 || (bfd_signed_vma) relocation > 0x7ffff)
419 return bfd_reloc_overflow;
420 else
421 return bfd_reloc_ok;
422 }
423
424 static bool
425 elf_s390_is_local_label_name (bfd *abfd, const char *name)
426 {
427 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
428 return true;
429
430 return _bfd_elf_is_local_label_name (abfd, name);
431 }
432
433 /* Functions for the 390 ELF linker. */
434
435 /* The name of the dynamic interpreter. This is put in the .interp
436 section. */
437
438 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
439
440 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
441 copying dynamic variables from a shared lib into an app's dynbss
442 section, and instead use a dynamic relocation to point into the
443 shared lib. */
444 #define ELIMINATE_COPY_RELOCS 1
445
446 /* The size in bytes of the first entry in the procedure linkage table. */
447 #define PLT_FIRST_ENTRY_SIZE 32
448 /* The size in bytes of an entry in the procedure linkage table. */
449 #define PLT_ENTRY_SIZE 32
450
451 #define GOT_ENTRY_SIZE 4
452
453 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
454
455 /* The first three entries in a procedure linkage table are reserved,
456 and the initial contents are unimportant (we zero them out).
457 Subsequent entries look like this. See the SVR4 ABI 386
458 supplement to see how this works. */
459
460 /* For the s390, simple addr offset can only be 0 - 4096.
461 To use the full 2 GB address space, several instructions
462 are needed to load an address in a register and execute
463 a branch( or just saving the address)
464
465 Furthermore, only r 0 and 1 are free to use!!! */
466
467 /* The first 3 words in the GOT are then reserved.
468 Word 0 is the address of the dynamic table.
469 Word 1 is a pointer to a structure describing the object
470 Word 2 is used to point to the loader entry address.
471
472 The code for position independent PLT entries looks like this:
473
474 r12 holds addr of the current GOT at entry to the PLT
475
476 The GOT holds the address in the PLT to be executed.
477 The loader then gets:
478 24(15) = Pointer to the structure describing the object.
479 28(15) = Offset into rela.plt
480
481 The loader must then find the module where the function is
482 and insert the address in the GOT.
483
484 Note: 390 can only address +- 64 K relative.
485 We check if offset > 65536, then make a relative branch -64xxx
486 back to a previous defined branch
487
488 PLT1: BASR 1,0 # 2 bytes
489 L 1,22(1) # 4 bytes Load offset in GOT in r 1
490 L 1,(1,12) # 4 bytes Load address from GOT in r1
491 BCR 15,1 # 2 bytes Jump to address
492 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
493 L 1,14(1) # 4 bytes Load offset in symol table in r1
494 BRC 15,-x # 4 bytes Jump to start of PLT
495 .word 0 # 2 bytes filler
496 .long ? # 4 bytes offset in GOT
497 .long ? # 4 bytes offset into rela.plt
498
499 This was the general case. There are two additional, optimizes PLT
500 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
501 First the one for GOT offsets < 4096:
502
503 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
504 BCR 15,1 # 2 bytes Jump to address
505 .word 0,0,0 # 6 bytes filler
506 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
507 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
508 BRC 15,-x # 4 bytes Jump to start of PLT
509 .word 0,0,0 # 6 bytes filler
510 .long ? # 4 bytes offset into rela.plt
511
512 Second the one for GOT offsets < 32768:
513
514 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
515 L 1,(1,12) # 4 bytes Load address from GOT to r1
516 BCR 15,1 # 2 bytes Jump to address
517 .word 0 # 2 bytes filler
518 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
519 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
520 BRC 15,-x # 4 bytes Jump to start of PLT
521 .word 0,0,0 # 6 bytes filler
522 .long ? # 4 bytes offset into rela.plt
523
524 Total = 32 bytes per PLT entry
525
526 The code for static build PLT entries looks like this:
527
528 PLT1: BASR 1,0 # 2 bytes
529 L 1,22(1) # 4 bytes Load address of GOT entry
530 L 1,0(0,1) # 4 bytes Load address from GOT in r1
531 BCR 15,1 # 2 bytes Jump to address
532 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
533 L 1,14(1) # 4 bytes Load offset in symbol table in r1
534 BRC 15,-x # 4 bytes Jump to start of PLT
535 .word 0 # 2 bytes filler
536 .long ? # 4 bytes address of GOT entry
537 .long ? # 4 bytes offset into rela.plt */
538
539 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
540 {
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
543 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
544 0x07, 0xf1, /* br %r1 */
545 0x0d, 0x10, /* basr %r1,%r0 */
546 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
547 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
548 0x00, 0x00, /* padding */
549 0x00, 0x00, 0x00, 0x00, /* GOT offset */
550 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
551 };
552
553 /* Generic PLT pic entry. */
554 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
555 {
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
558 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
559 0x07, 0xf1, /* br %r1 */
560 0x0d, 0x10, /* basr %r1,%r0 */
561 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
562 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
563 0x00, 0x00, /* padding */
564 0x00, 0x00, 0x00, 0x00, /* GOT offset */
565 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
566 };
567
568 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
569 when generating the PLT slot with the GOT offset. */
570 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
571 {
572 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
573 0x07, 0xf1, /* br %r1 */
574 0x00, 0x00, 0x00, 0x00, /* padding */
575 0x00, 0x00,
576 0x0d, 0x10, /* basr %r1,%r0 */
577 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
578 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
579 0x00, 0x00, 0x00, 0x00,
580 0x00, 0x00, 0x00, 0x00
581 };
582
583 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
584 when generating the PLT slot with the GOT offset. */
585 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
586 {
587 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
588 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
589 0x07, 0xf1, /* br %r1 */
590 0x00, 0x00,
591 0x0d, 0x10, /* basr %r1,%r0 */
592 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
593 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
594 0x00, 0x00, 0x00, 0x00,
595 0x00, 0x00, 0x00, 0x00,
596 0x00, 0x00
597 };
598
599 /* The first PLT entry pushes the offset into the rela.plt
600 from R1 onto the stack at 8(15) and the loader object info
601 at 12(15), loads the loader address in R1 and jumps to it. */
602
603 /* The first entry in the PLT for PIC code:
604
605 PLT0:
606 ST 1,28(15) # R1 has offset into rela.plt
607 L 1,4(12) # Get loader ino(object struct address)
608 ST 1,24(15) # Store address
609 L 1,8(12) # Entry address of loader in R1
610 BR 1 # Jump to loader
611
612 The first entry in the PLT for static code:
613
614 PLT0:
615 ST 1,28(15) # R1 has offset into rela.plt
616 BASR 1,0
617 L 1,18(0,1) # Get address of GOT
618 MVC 24(4,15),4(1) # Move loader ino to stack
619 L 1,8(1) # Get address of loader
620 BR 1 # Jump to loader
621 .word 0 # filler
622 .long got # address of GOT */
623
624 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
625 {
626 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
627 0x0d, 0x10, /* basr %r1,%r0 */
628 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
629 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
630 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
631 0x07, 0xf1, /* br %r1 */
632 0x00, 0x00, 0x00, 0x00,
633 0x00, 0x00, 0x00, 0x00,
634 0x00, 0x00
635 };
636
637 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
638 {
639 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
640 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
641 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
642 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
643 0x07, 0xf1, /* br %r1 */
644 0x00, 0x00, 0x00, 0x00,
645 0x00, 0x00, 0x00, 0x00,
646 0x00, 0x00, 0x00, 0x00,
647 0x00, 0x00
648 };
649
650
651 /* s390 ELF linker hash entry. */
652
653 struct elf_s390_link_hash_entry
654 {
655 struct elf_link_hash_entry elf;
656
657 /* Number of GOTPLT references for a function. */
658 bfd_signed_vma gotplt_refcount;
659
660 #define GOT_UNKNOWN 0
661 #define GOT_NORMAL 1
662 #define GOT_TLS_GD 2
663 #define GOT_TLS_IE 3
664 #define GOT_TLS_IE_NLT 4
665 unsigned char tls_type;
666
667 /* For pointer equality reasons we might need to change the symbol
668 type from STT_GNU_IFUNC to STT_FUNC together with its value and
669 section entry. So after alloc_dynrelocs only these values should
670 be used. In order to check whether a symbol is IFUNC use
671 s390_is_ifunc_symbol_p. */
672 bfd_vma ifunc_resolver_address;
673 asection *ifunc_resolver_section;
674 };
675
676 #define elf_s390_hash_entry(ent) \
677 ((struct elf_s390_link_hash_entry *)(ent))
678
679 /* This structure represents an entry in the local PLT list needed for
680 local IFUNC symbols. */
681 struct plt_entry
682 {
683 /* The section of the local symbol.
684 Set in relocate_section and used in finish_dynamic_sections. */
685 asection *sec;
686
687 union
688 {
689 bfd_signed_vma refcount;
690 bfd_vma offset;
691 } plt;
692 };
693
694 /* NOTE: Keep this structure in sync with
695 the one declared in elf64-s390.c. */
696 struct elf_s390_obj_tdata
697 {
698 struct elf_obj_tdata root;
699
700 /* A local PLT is needed for ifunc symbols. */
701 struct plt_entry *local_plt;
702
703 /* TLS type for each local got entry. */
704 char *local_got_tls_type;
705 };
706
707 #define elf_s390_tdata(abfd) \
708 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
709
710 #define elf_s390_local_plt(abfd) \
711 (elf_s390_tdata (abfd)->local_plt)
712
713 #define elf_s390_local_got_tls_type(abfd) \
714 (elf_s390_tdata (abfd)->local_got_tls_type)
715
716 #define is_s390_elf(bfd) \
717 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
718 && elf_tdata (bfd) != NULL \
719 && elf_object_id (bfd) == S390_ELF_DATA)
720
721 static bool
722 elf_s390_mkobject (bfd *abfd)
723 {
724 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
725 S390_ELF_DATA);
726 }
727
728 static bool
729 elf_s390_object_p (bfd *abfd)
730 {
731 /* Set the right machine number for an s390 elf32 file. */
732 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
733 }
734
735 /* s390 ELF linker hash table. */
736
737 struct elf_s390_link_hash_table
738 {
739 struct elf_link_hash_table elf;
740
741 /* Short-cuts to get to dynamic linker sections. */
742 asection *irelifunc;
743
744 union
745 {
746 bfd_signed_vma refcount;
747 bfd_vma offset;
748 } tls_ldm_got;
749 };
750
751 /* Get the s390 ELF linker hash table from a link_info structure. */
752
753 #define elf_s390_hash_table(p) \
754 ((is_elf_hash_table ((p)->hash) \
755 && elf_hash_table_id (elf_hash_table (p)) == S390_ELF_DATA) \
756 ? (struct elf_s390_link_hash_table *) (p)->hash : NULL)
757
758 #undef ELF64
759 #include "elf-s390-common.c"
760
761 /* Create an entry in an s390 ELF linker hash table. */
762
763 static struct bfd_hash_entry *
764 link_hash_newfunc (struct bfd_hash_entry *entry,
765 struct bfd_hash_table *table,
766 const char *string)
767 {
768 /* Allocate the structure if it has not already been allocated by a
769 subclass. */
770 if (entry == NULL)
771 {
772 entry = bfd_hash_allocate (table,
773 sizeof (struct elf_s390_link_hash_entry));
774 if (entry == NULL)
775 return entry;
776 }
777
778 /* Call the allocation method of the superclass. */
779 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
780 if (entry != NULL)
781 {
782 struct elf_s390_link_hash_entry *eh;
783
784 eh = (struct elf_s390_link_hash_entry *) entry;
785 eh->gotplt_refcount = 0;
786 eh->tls_type = GOT_UNKNOWN;
787 eh->ifunc_resolver_address = 0;
788 eh->ifunc_resolver_section = NULL;
789 }
790
791 return entry;
792 }
793
794 /* Create an s390 ELF linker hash table. */
795
796 static struct bfd_link_hash_table *
797 elf_s390_link_hash_table_create (bfd *abfd)
798 {
799 struct elf_s390_link_hash_table *ret;
800 size_t amt = sizeof (struct elf_s390_link_hash_table);
801
802 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
803 if (ret == NULL)
804 return NULL;
805
806 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
807 sizeof (struct elf_s390_link_hash_entry),
808 S390_ELF_DATA))
809 {
810 free (ret);
811 return NULL;
812 }
813
814 return &ret->elf.root;
815 }
816
817 /* Copy the extra info we tack onto an elf_link_hash_entry. */
818
819 static void
820 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
821 struct elf_link_hash_entry *dir,
822 struct elf_link_hash_entry *ind)
823 {
824 struct elf_s390_link_hash_entry *edir, *eind;
825
826 edir = (struct elf_s390_link_hash_entry *) dir;
827 eind = (struct elf_s390_link_hash_entry *) ind;
828
829 if (ind->root.type == bfd_link_hash_indirect
830 && dir->got.refcount <= 0)
831 {
832 edir->tls_type = eind->tls_type;
833 eind->tls_type = GOT_UNKNOWN;
834 }
835
836 if (ELIMINATE_COPY_RELOCS
837 && ind->root.type != bfd_link_hash_indirect
838 && dir->dynamic_adjusted)
839 {
840 /* If called to transfer flags for a weakdef during processing
841 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
842 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
843 if (dir->versioned != versioned_hidden)
844 dir->ref_dynamic |= ind->ref_dynamic;
845 dir->ref_regular |= ind->ref_regular;
846 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
847 dir->needs_plt |= ind->needs_plt;
848 }
849 else
850 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
851 }
852
853 static int
854 elf_s390_tls_transition (struct bfd_link_info *info,
855 int r_type,
856 int is_local)
857 {
858 if (bfd_link_pic (info))
859 return r_type;
860
861 switch (r_type)
862 {
863 case R_390_TLS_GD32:
864 case R_390_TLS_IE32:
865 if (is_local)
866 return R_390_TLS_LE32;
867 return R_390_TLS_IE32;
868 case R_390_TLS_GOTIE32:
869 if (is_local)
870 return R_390_TLS_LE32;
871 return R_390_TLS_GOTIE32;
872 case R_390_TLS_LDM32:
873 return R_390_TLS_LE32;
874 }
875
876 return r_type;
877 }
878
879 /* Look through the relocs for a section during the first phase, and
880 allocate space in the global offset table or procedure linkage
881 table. */
882
883 static bool
884 elf_s390_check_relocs (bfd *abfd,
885 struct bfd_link_info *info,
886 asection *sec,
887 const Elf_Internal_Rela *relocs)
888 {
889 struct elf_s390_link_hash_table *htab;
890 Elf_Internal_Shdr *symtab_hdr;
891 struct elf_link_hash_entry **sym_hashes;
892 const Elf_Internal_Rela *rel;
893 const Elf_Internal_Rela *rel_end;
894 asection *sreloc;
895 bfd_signed_vma *local_got_refcounts;
896 int tls_type, old_tls_type;
897 Elf_Internal_Sym *isym;
898
899 if (bfd_link_relocatable (info))
900 return true;
901
902 BFD_ASSERT (is_s390_elf (abfd));
903
904 htab = elf_s390_hash_table (info);
905 symtab_hdr = &elf_symtab_hdr (abfd);
906 sym_hashes = elf_sym_hashes (abfd);
907 local_got_refcounts = elf_local_got_refcounts (abfd);
908
909 sreloc = NULL;
910
911 rel_end = relocs + sec->reloc_count;
912 for (rel = relocs; rel < rel_end; rel++)
913 {
914 unsigned int r_type;
915 unsigned int r_symndx;
916 struct elf_link_hash_entry *h;
917
918 r_symndx = ELF32_R_SYM (rel->r_info);
919
920 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
921 {
922 /* xgettext:c-format */
923 _bfd_error_handler (_("%pB: bad symbol index: %d"),
924 abfd, r_symndx);
925 return false;
926 }
927
928 if (r_symndx < symtab_hdr->sh_info)
929 {
930 /* A local symbol. */
931 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
932 abfd, r_symndx);
933 if (isym == NULL)
934 return false;
935
936 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
937 {
938 struct plt_entry *plt;
939
940 if (htab->elf.dynobj == NULL)
941 htab->elf.dynobj = abfd;
942
943 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
944 return false;
945
946 if (local_got_refcounts == NULL)
947 {
948 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
949 return false;
950 local_got_refcounts = elf_local_got_refcounts (abfd);
951 }
952 plt = elf_s390_local_plt (abfd);
953 plt[r_symndx].plt.refcount++;
954 }
955 h = NULL;
956 }
957 else
958 {
959 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
960 while (h->root.type == bfd_link_hash_indirect
961 || h->root.type == bfd_link_hash_warning)
962 h = (struct elf_link_hash_entry *) h->root.u.i.link;
963 }
964
965 /* Create got section and local_got_refcounts array if they
966 are needed. */
967 r_type = elf_s390_tls_transition (info,
968 ELF32_R_TYPE (rel->r_info),
969 h == NULL);
970 switch (r_type)
971 {
972 case R_390_GOT12:
973 case R_390_GOT16:
974 case R_390_GOT20:
975 case R_390_GOT32:
976 case R_390_GOTENT:
977 case R_390_GOTPLT12:
978 case R_390_GOTPLT16:
979 case R_390_GOTPLT20:
980 case R_390_GOTPLT32:
981 case R_390_GOTPLTENT:
982 case R_390_TLS_GD32:
983 case R_390_TLS_GOTIE12:
984 case R_390_TLS_GOTIE20:
985 case R_390_TLS_GOTIE32:
986 case R_390_TLS_IEENT:
987 case R_390_TLS_IE32:
988 case R_390_TLS_LDM32:
989 if (h == NULL
990 && local_got_refcounts == NULL)
991 {
992 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
993 return false;
994 local_got_refcounts = elf_local_got_refcounts (abfd);
995 }
996 /* Fall through. */
997 case R_390_GOTOFF16:
998 case R_390_GOTOFF32:
999 case R_390_GOTPC:
1000 case R_390_GOTPCDBL:
1001 if (htab->elf.sgot == NULL)
1002 {
1003 if (htab->elf.dynobj == NULL)
1004 htab->elf.dynobj = abfd;
1005 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1006 return false;
1007 }
1008 }
1009
1010 if (h != NULL)
1011 {
1012 if (htab->elf.dynobj == NULL)
1013 htab->elf.dynobj = abfd;
1014 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1015 return false;
1016
1017 /* Make sure an IFUNC symbol defined in a non-shared object
1018 always gets a PLT slot. */
1019 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1020 {
1021 /* The symbol is called by the dynamic loader in order
1022 to resolve the relocation. So it is in fact also
1023 referenced. */
1024 h->ref_regular = 1;
1025 h->needs_plt = 1;
1026 }
1027 }
1028 switch (r_type)
1029 {
1030 case R_390_GOTPC:
1031 case R_390_GOTPCDBL:
1032 /* These relocs do not need a GOT slot. They just load the
1033 GOT pointer itself or address something else relative to
1034 the GOT. Since the GOT pointer has been set up above we
1035 are done. */
1036 break;
1037 case R_390_GOTOFF16:
1038 case R_390_GOTOFF32:
1039 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1040 break;
1041 /* Fall through. */
1042
1043 case R_390_PLT12DBL:
1044 case R_390_PLT16DBL:
1045 case R_390_PLT24DBL:
1046 case R_390_PLT32DBL:
1047 case R_390_PLT32:
1048 case R_390_PLTOFF16:
1049 case R_390_PLTOFF32:
1050 /* This symbol requires a procedure linkage table entry. We
1051 actually build the entry in adjust_dynamic_symbol,
1052 because this might be a case of linking PIC code which is
1053 never referenced by a dynamic object, in which case we
1054 don't need to generate a procedure linkage table entry
1055 after all. */
1056
1057 /* If this is a local symbol, we resolve it directly without
1058 creating a procedure linkage table entry. */
1059 if (h != NULL)
1060 {
1061 h->needs_plt = 1;
1062 h->plt.refcount += 1;
1063 }
1064 break;
1065
1066 case R_390_GOTPLT12:
1067 case R_390_GOTPLT16:
1068 case R_390_GOTPLT20:
1069 case R_390_GOTPLT32:
1070 case R_390_GOTPLTENT:
1071 /* This symbol requires either a procedure linkage table entry
1072 or an entry in the local got. We actually build the entry
1073 in adjust_dynamic_symbol because whether this is really a
1074 global reference can change and with it the fact if we have
1075 to create a plt entry or a local got entry. To be able to
1076 make a once global symbol a local one we have to keep track
1077 of the number of gotplt references that exist for this
1078 symbol. */
1079 if (h != NULL)
1080 {
1081 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1082 h->needs_plt = 1;
1083 h->plt.refcount += 1;
1084 }
1085 else
1086 local_got_refcounts[r_symndx] += 1;
1087 break;
1088
1089 case R_390_TLS_LDM32:
1090 htab->tls_ldm_got.refcount += 1;
1091 break;
1092
1093 case R_390_TLS_IE32:
1094 case R_390_TLS_GOTIE12:
1095 case R_390_TLS_GOTIE20:
1096 case R_390_TLS_GOTIE32:
1097 case R_390_TLS_IEENT:
1098 if (bfd_link_pic (info))
1099 info->flags |= DF_STATIC_TLS;
1100 /* Fall through. */
1101
1102 case R_390_GOT12:
1103 case R_390_GOT16:
1104 case R_390_GOT20:
1105 case R_390_GOT32:
1106 case R_390_GOTENT:
1107 case R_390_TLS_GD32:
1108 /* This symbol requires a global offset table entry. */
1109 switch (r_type)
1110 {
1111 default:
1112 case R_390_GOT12:
1113 case R_390_GOT16:
1114 case R_390_GOT20:
1115 case R_390_GOT32:
1116 case R_390_GOTENT:
1117 tls_type = GOT_NORMAL;
1118 break;
1119 case R_390_TLS_GD32:
1120 tls_type = GOT_TLS_GD;
1121 break;
1122 case R_390_TLS_IE32:
1123 case R_390_TLS_GOTIE32:
1124 tls_type = GOT_TLS_IE;
1125 break;
1126 case R_390_TLS_GOTIE12:
1127 case R_390_TLS_GOTIE20:
1128 case R_390_TLS_IEENT:
1129 tls_type = GOT_TLS_IE_NLT;
1130 break;
1131 }
1132
1133 if (h != NULL)
1134 {
1135 h->got.refcount += 1;
1136 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1137 }
1138 else
1139 {
1140 local_got_refcounts[r_symndx] += 1;
1141 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1142 }
1143 /* If a TLS symbol is accessed using IE at least once,
1144 there is no point to use dynamic model for it. */
1145 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1146 {
1147 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1148 {
1149 _bfd_error_handler
1150 /* xgettext:c-format */
1151 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1152 abfd, h->root.root.string);
1153 return false;
1154 }
1155 if (old_tls_type > tls_type)
1156 tls_type = old_tls_type;
1157 }
1158
1159 if (old_tls_type != tls_type)
1160 {
1161 if (h != NULL)
1162 elf_s390_hash_entry (h)->tls_type = tls_type;
1163 else
1164 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1165 }
1166
1167 if (r_type != R_390_TLS_IE32)
1168 break;
1169 /* Fall through. */
1170
1171 case R_390_TLS_LE32:
1172 /* For static linking and executables this reloc will be
1173 calculated at linktime otherwise a TLS_TPOFF runtime
1174 reloc will be generated. */
1175 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1176 break;
1177
1178 if (!bfd_link_pic (info))
1179 break;
1180 info->flags |= DF_STATIC_TLS;
1181 /* Fall through. */
1182
1183 case R_390_8:
1184 case R_390_16:
1185 case R_390_32:
1186 case R_390_PC16:
1187 case R_390_PC12DBL:
1188 case R_390_PC16DBL:
1189 case R_390_PC24DBL:
1190 case R_390_PC32DBL:
1191 case R_390_PC32:
1192 if (h != NULL && bfd_link_executable (info))
1193 {
1194 /* If this reloc is in a read-only section, we might
1195 need a copy reloc. We can't check reliably at this
1196 stage whether the section is read-only, as input
1197 sections have not yet been mapped to output sections.
1198 Tentatively set the flag for now, and correct in
1199 adjust_dynamic_symbol. */
1200 h->non_got_ref = 1;
1201
1202 if (!bfd_link_pic (info))
1203 {
1204 /* We may need a .plt entry if the function this reloc
1205 refers to is in a shared lib. */
1206 h->plt.refcount += 1;
1207 }
1208 }
1209
1210 /* If we are creating a shared library, and this is a reloc
1211 against a global symbol, or a non PC relative reloc
1212 against a local symbol, then we need to copy the reloc
1213 into the shared library. However, if we are linking with
1214 -Bsymbolic, we do not need to copy a reloc against a
1215 global symbol which is defined in an object we are
1216 including in the link (i.e., DEF_REGULAR is set). At
1217 this point we have not seen all the input files, so it is
1218 possible that DEF_REGULAR is not set now but will be set
1219 later (it is never cleared). In case of a weak definition,
1220 DEF_REGULAR may be cleared later by a strong definition in
1221 a shared library. We account for that possibility below by
1222 storing information in the relocs_copied field of the hash
1223 table entry. A similar situation occurs when creating
1224 shared libraries and symbol visibility changes render the
1225 symbol local.
1226
1227 If on the other hand, we are creating an executable, we
1228 may need to keep relocations for symbols satisfied by a
1229 dynamic library if we manage to avoid copy relocs for the
1230 symbol. */
1231 if ((bfd_link_pic (info)
1232 && (sec->flags & SEC_ALLOC) != 0
1233 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1234 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1235 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1236 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1237 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1238 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1239 || (h != NULL
1240 && (! SYMBOLIC_BIND (info, h)
1241 || h->root.type == bfd_link_hash_defweak
1242 || !h->def_regular))))
1243 || (ELIMINATE_COPY_RELOCS
1244 && !bfd_link_pic (info)
1245 && (sec->flags & SEC_ALLOC) != 0
1246 && h != NULL
1247 && (h->root.type == bfd_link_hash_defweak
1248 || !h->def_regular)))
1249 {
1250 struct elf_dyn_relocs *p;
1251 struct elf_dyn_relocs **head;
1252
1253 /* We must copy these reloc types into the output file.
1254 Create a reloc section in dynobj and make room for
1255 this reloc. */
1256 if (sreloc == NULL)
1257 {
1258 if (htab->elf.dynobj == NULL)
1259 htab->elf.dynobj = abfd;
1260
1261 sreloc = _bfd_elf_make_dynamic_reloc_section
1262 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ true);
1263
1264 if (sreloc == NULL)
1265 return false;
1266 }
1267
1268 /* If this is a global symbol, we count the number of
1269 relocations we need for this symbol. */
1270 if (h != NULL)
1271 {
1272 head = &h->dyn_relocs;
1273 }
1274 else
1275 {
1276 /* Track dynamic relocs needed for local syms too.
1277 We really need local syms available to do this
1278 easily. Oh well. */
1279 asection *s;
1280 void *vpp;
1281
1282 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
1283 abfd, r_symndx);
1284 if (isym == NULL)
1285 return false;
1286
1287 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1288 if (s == NULL)
1289 s = sec;
1290
1291 vpp = &elf_section_data (s)->local_dynrel;
1292 head = (struct elf_dyn_relocs **) vpp;
1293 }
1294
1295 p = *head;
1296 if (p == NULL || p->sec != sec)
1297 {
1298 size_t amt = sizeof *p;
1299
1300 p = ((struct elf_dyn_relocs *)
1301 bfd_alloc (htab->elf.dynobj, amt));
1302 if (p == NULL)
1303 return false;
1304 p->next = *head;
1305 *head = p;
1306 p->sec = sec;
1307 p->count = 0;
1308 p->pc_count = 0;
1309 }
1310
1311 p->count += 1;
1312 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1313 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1314 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1315 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1316 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1317 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1318 p->pc_count += 1;
1319 }
1320 break;
1321
1322 /* This relocation describes the C++ object vtable hierarchy.
1323 Reconstruct it for later use during GC. */
1324 case R_390_GNU_VTINHERIT:
1325 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1326 return false;
1327 break;
1328
1329 /* This relocation describes which C++ vtable entries are actually
1330 used. Record for later use during GC. */
1331 case R_390_GNU_VTENTRY:
1332 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1333 return false;
1334 break;
1335
1336 default:
1337 break;
1338 }
1339 }
1340
1341 return true;
1342 }
1343
1344 /* Return the section that should be marked against GC for a given
1345 relocation. */
1346
1347 static asection *
1348 elf_s390_gc_mark_hook (asection *sec,
1349 struct bfd_link_info *info,
1350 Elf_Internal_Rela *rel,
1351 struct elf_link_hash_entry *h,
1352 Elf_Internal_Sym *sym)
1353 {
1354 if (h != NULL)
1355 switch (ELF32_R_TYPE (rel->r_info))
1356 {
1357 case R_390_GNU_VTINHERIT:
1358 case R_390_GNU_VTENTRY:
1359 return NULL;
1360 }
1361 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1362
1363 }
1364
1365 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1366 entry but we found we will not create any. Called when we find we will
1367 not have any PLT for this symbol, by for example
1368 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1369 or elf_s390_late_size_sections if no dynamic sections will be
1370 created (we're only linking static objects). */
1371
1372 static void
1373 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1374 {
1375 if (h->elf.root.type == bfd_link_hash_warning)
1376 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1377
1378 if (h->gotplt_refcount <= 0)
1379 return;
1380
1381 /* We simply add the number of gotplt references to the number
1382 * of got references for this symbol. */
1383 h->elf.got.refcount += h->gotplt_refcount;
1384 h->gotplt_refcount = -1;
1385 }
1386
1387 /* Adjust a symbol defined by a dynamic object and referenced by a
1388 regular object. The current definition is in some section of the
1389 dynamic object, but we're not including those sections. We have to
1390 change the definition to something the rest of the link can
1391 understand. */
1392
1393 static bool
1394 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1395 struct elf_link_hash_entry *h)
1396 {
1397 struct elf_s390_link_hash_table *htab;
1398 asection *s, *srel;
1399
1400 /* STT_GNU_IFUNC symbol must go through PLT. */
1401 if (s390_is_ifunc_symbol_p (h))
1402 {
1403 /* All local STT_GNU_IFUNC references must be treated as local
1404 calls via local PLT. */
1405 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1406 {
1407 bfd_size_type pc_count = 0, count = 0;
1408 struct elf_dyn_relocs **pp;
1409 struct elf_dyn_relocs *p;
1410
1411 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1412 {
1413 pc_count += p->pc_count;
1414 p->count -= p->pc_count;
1415 p->pc_count = 0;
1416 count += p->count;
1417 if (p->count == 0)
1418 *pp = p->next;
1419 else
1420 pp = &p->next;
1421 }
1422
1423 if (pc_count || count)
1424 {
1425 h->needs_plt = 1;
1426 h->non_got_ref = 1;
1427 if (h->plt.refcount <= 0)
1428 h->plt.refcount = 1;
1429 else
1430 h->plt.refcount += 1;
1431 }
1432 }
1433
1434 if (h->plt.refcount <= 0)
1435 {
1436 h->plt.offset = (bfd_vma) -1;
1437 h->needs_plt = 0;
1438 }
1439 return true;
1440 }
1441
1442 /* If this is a function, put it in the procedure linkage table. We
1443 will fill in the contents of the procedure linkage table later
1444 (although we could actually do it here). */
1445 if (h->type == STT_FUNC
1446 || h->needs_plt)
1447 {
1448 if (h->plt.refcount <= 0
1449 || SYMBOL_CALLS_LOCAL (info, h)
1450 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1451 {
1452 /* This case can occur if we saw a PLT32 reloc in an input
1453 file, but the symbol was never referred to by a dynamic
1454 object, or if all references were garbage collected. In
1455 such a case, we don't actually need to build a procedure
1456 linkage table, and we can just do a PC32 reloc instead. */
1457 h->plt.offset = (bfd_vma) -1;
1458 h->needs_plt = 0;
1459 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1460 }
1461
1462 return true;
1463 }
1464 else
1465 /* It's possible that we incorrectly decided a .plt reloc was
1466 needed for an R_390_PC32 reloc to a non-function sym in
1467 check_relocs. We can't decide accurately between function and
1468 non-function syms in check-relocs; Objects loaded later in
1469 the link may change h->type. So fix it now. */
1470 h->plt.offset = (bfd_vma) -1;
1471
1472 /* If this is a weak symbol, and there is a real definition, the
1473 processor independent code will have arranged for us to see the
1474 real definition first, and we can just use the same value. */
1475 if (h->is_weakalias)
1476 {
1477 struct elf_link_hash_entry *def = weakdef (h);
1478 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1479 h->root.u.def.section = def->root.u.def.section;
1480 h->root.u.def.value = def->root.u.def.value;
1481 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1482 h->non_got_ref = def->non_got_ref;
1483 return true;
1484 }
1485
1486 /* This is a reference to a symbol defined by a dynamic object which
1487 is not a function. */
1488
1489 /* If we are creating a shared library, we must presume that the
1490 only references to the symbol are via the global offset table.
1491 For such cases we need not do anything here; the relocations will
1492 be handled correctly by relocate_section. */
1493 if (bfd_link_pic (info))
1494 return true;
1495
1496 /* If there are no references to this symbol that do not use the
1497 GOT, we don't need to generate a copy reloc. */
1498 if (!h->non_got_ref)
1499 return true;
1500
1501 /* If -z nocopyreloc was given, we won't generate them either. */
1502 if (info->nocopyreloc)
1503 {
1504 h->non_got_ref = 0;
1505 return true;
1506 }
1507
1508 /* If we don't find any dynamic relocs in read-only sections, then
1509 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1510 if (ELIMINATE_COPY_RELOCS && !_bfd_elf_readonly_dynrelocs (h))
1511 {
1512 h->non_got_ref = 0;
1513 return true;
1514 }
1515
1516 /* We must allocate the symbol in our .dynbss section, which will
1517 become part of the .bss section of the executable. There will be
1518 an entry for this symbol in the .dynsym section. The dynamic
1519 object will contain position independent code, so all references
1520 from the dynamic object to this symbol will go through the global
1521 offset table. The dynamic linker will use the .dynsym entry to
1522 determine the address it must put in the global offset table, so
1523 both the dynamic object and the regular object will refer to the
1524 same memory location for the variable. */
1525
1526 htab = elf_s390_hash_table (info);
1527
1528 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1529 copy the initial value out of the dynamic object and into the
1530 runtime process image. */
1531 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1532 {
1533 s = htab->elf.sdynrelro;
1534 srel = htab->elf.sreldynrelro;
1535 }
1536 else
1537 {
1538 s = htab->elf.sdynbss;
1539 srel = htab->elf.srelbss;
1540 }
1541 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1542 {
1543 srel->size += sizeof (Elf32_External_Rela);
1544 h->needs_copy = 1;
1545 }
1546
1547 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1548 }
1549
1550 /* Allocate space in .plt, .got and associated reloc sections for
1551 dynamic relocs. */
1552
1553 static bool
1554 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1555 {
1556 struct bfd_link_info *info;
1557 struct elf_s390_link_hash_table *htab;
1558 struct elf_dyn_relocs *p;
1559
1560 if (h->root.type == bfd_link_hash_indirect)
1561 return true;
1562
1563 info = (struct bfd_link_info *) inf;
1564 htab = elf_s390_hash_table (info);
1565
1566 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1567 here if it is defined and referenced in a non-shared object. */
1568 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1569 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1570 else if (htab->elf.dynamic_sections_created
1571 && h->plt.refcount > 0)
1572 {
1573 /* Make sure this symbol is output as a dynamic symbol.
1574 Undefined weak syms won't yet be marked as dynamic. */
1575 if (h->dynindx == -1
1576 && !h->forced_local)
1577 {
1578 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1579 return false;
1580 }
1581
1582 if (bfd_link_pic (info)
1583 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1584 {
1585 asection *s = htab->elf.splt;
1586
1587 /* If this is the first .plt entry, make room for the special
1588 first entry. */
1589 if (s->size == 0)
1590 s->size += PLT_FIRST_ENTRY_SIZE;
1591
1592 h->plt.offset = s->size;
1593
1594 /* If this symbol is not defined in a regular file, and we are
1595 not generating a shared library, then set the symbol to this
1596 location in the .plt. This is required to make function
1597 pointers compare as equal between the normal executable and
1598 the shared library. */
1599 if (! bfd_link_pic (info)
1600 && !h->def_regular)
1601 {
1602 h->root.u.def.section = s;
1603 h->root.u.def.value = h->plt.offset;
1604 }
1605
1606 /* Make room for this entry. */
1607 s->size += PLT_ENTRY_SIZE;
1608
1609 /* We also need to make an entry in the .got.plt section, which
1610 will be placed in the .got section by the linker script. */
1611 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1612
1613 /* We also need to make an entry in the .rela.plt section. */
1614 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1615 }
1616 else
1617 {
1618 h->plt.offset = (bfd_vma) -1;
1619 h->needs_plt = 0;
1620 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1621 }
1622 }
1623 else
1624 {
1625 h->plt.offset = (bfd_vma) -1;
1626 h->needs_plt = 0;
1627 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1628 }
1629
1630 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1631 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1632 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1633 we can save the dynamic TLS relocation. */
1634 if (h->got.refcount > 0
1635 && !bfd_link_pic (info)
1636 && h->dynindx == -1
1637 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1638 {
1639 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1640 /* For the GOTIE access without a literal pool entry the offset has
1641 to be stored somewhere. The immediate value in the instruction
1642 is not bit enough so the value is stored in the got. */
1643 {
1644 h->got.offset = htab->elf.sgot->size;
1645 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1646 }
1647 else
1648 h->got.offset = (bfd_vma) -1;
1649 }
1650 else if (h->got.refcount > 0)
1651 {
1652 asection *s;
1653 bool dyn;
1654 int tls_type = elf_s390_hash_entry(h)->tls_type;
1655
1656 /* Make sure this symbol is output as a dynamic symbol.
1657 Undefined weak syms won't yet be marked as dynamic. */
1658 if (h->dynindx == -1
1659 && !h->forced_local)
1660 {
1661 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1662 return false;
1663 }
1664
1665 s = htab->elf.sgot;
1666 h->got.offset = s->size;
1667 s->size += GOT_ENTRY_SIZE;
1668 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1669 if (tls_type == GOT_TLS_GD)
1670 s->size += GOT_ENTRY_SIZE;
1671 dyn = htab->elf.dynamic_sections_created;
1672 /* R_390_TLS_IE32 needs one dynamic relocation,
1673 R_390_TLS_GD32 needs one if local symbol and two if global. */
1674 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1675 || tls_type >= GOT_TLS_IE)
1676 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1677 else if (tls_type == GOT_TLS_GD)
1678 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1679 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1680 && (bfd_link_pic (info)
1681 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1682 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1683 }
1684 else
1685 h->got.offset = (bfd_vma) -1;
1686
1687 if (h->dyn_relocs == NULL)
1688 return true;
1689
1690 /* In the shared -Bsymbolic case, discard space allocated for
1691 dynamic pc-relative relocs against symbols which turn out to be
1692 defined in regular objects. For the normal shared case, discard
1693 space for pc-relative relocs that have become local due to symbol
1694 visibility changes. */
1695
1696 if (bfd_link_pic (info))
1697 {
1698 if (SYMBOL_CALLS_LOCAL (info, h))
1699 {
1700 struct elf_dyn_relocs **pp;
1701
1702 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1703 {
1704 p->count -= p->pc_count;
1705 p->pc_count = 0;
1706 if (p->count == 0)
1707 *pp = p->next;
1708 else
1709 pp = &p->next;
1710 }
1711 }
1712
1713 /* Also discard relocs on undefined weak syms with non-default
1714 visibility. */
1715 if (h->dyn_relocs != NULL
1716 && h->root.type == bfd_link_hash_undefweak)
1717 {
1718 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1719 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1720 h->dyn_relocs = NULL;
1721
1722 /* Make sure undefined weak symbols are output as a dynamic
1723 symbol in PIEs. */
1724 else if (h->dynindx == -1
1725 && !h->forced_local)
1726 {
1727 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1728 return false;
1729 }
1730 }
1731 }
1732 else if (ELIMINATE_COPY_RELOCS)
1733 {
1734 /* For the non-shared case, discard space for relocs against
1735 symbols which turn out to need copy relocs or are not
1736 dynamic. */
1737
1738 if (!h->non_got_ref
1739 && ((h->def_dynamic
1740 && !h->def_regular)
1741 || (htab->elf.dynamic_sections_created
1742 && (h->root.type == bfd_link_hash_undefweak
1743 || h->root.type == bfd_link_hash_undefined))))
1744 {
1745 /* Make sure this symbol is output as a dynamic symbol.
1746 Undefined weak syms won't yet be marked as dynamic. */
1747 if (h->dynindx == -1
1748 && !h->forced_local)
1749 {
1750 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1751 return false;
1752 }
1753
1754 /* If that succeeded, we know we'll be keeping all the
1755 relocs. */
1756 if (h->dynindx != -1)
1757 goto keep;
1758 }
1759
1760 h->dyn_relocs = NULL;
1761
1762 keep: ;
1763 }
1764
1765 /* Finally, allocate space. */
1766 for (p = h->dyn_relocs; p != NULL; p = p->next)
1767 {
1768 asection *sreloc = elf_section_data (p->sec)->sreloc;
1769
1770 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1771 }
1772
1773 return true;
1774 }
1775
1776 /* Set the sizes of the dynamic sections. */
1777
1778 static bool
1779 elf_s390_late_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1780 struct bfd_link_info *info)
1781 {
1782 struct elf_s390_link_hash_table *htab;
1783 bfd *dynobj;
1784 asection *s;
1785 bool relocs;
1786 bfd *ibfd;
1787
1788 htab = elf_s390_hash_table (info);
1789 dynobj = htab->elf.dynobj;
1790 if (dynobj == NULL)
1791 return true;
1792
1793 if (htab->elf.dynamic_sections_created)
1794 {
1795 /* Set the contents of the .interp section to the interpreter. */
1796 if (bfd_link_executable (info) && !info->nointerp)
1797 {
1798 s = bfd_get_linker_section (dynobj, ".interp");
1799 if (s == NULL)
1800 abort ();
1801 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1802 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1803 }
1804 }
1805
1806 /* Set up .got offsets for local syms, and space for local dynamic
1807 relocs. */
1808 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1809 {
1810 bfd_signed_vma *local_got;
1811 bfd_signed_vma *end_local_got;
1812 char *local_tls_type;
1813 bfd_size_type locsymcount;
1814 Elf_Internal_Shdr *symtab_hdr;
1815 asection *srela;
1816 struct plt_entry *local_plt;
1817 unsigned int i;
1818
1819 if (! is_s390_elf (ibfd))
1820 continue;
1821
1822 for (s = ibfd->sections; s != NULL; s = s->next)
1823 {
1824 struct elf_dyn_relocs *p;
1825
1826 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1827 {
1828 if (!bfd_is_abs_section (p->sec)
1829 && bfd_is_abs_section (p->sec->output_section))
1830 {
1831 /* Input section has been discarded, either because
1832 it is a copy of a linkonce section or due to
1833 linker script /DISCARD/, so we'll be discarding
1834 the relocs too. */
1835 }
1836 else if (p->count != 0)
1837 {
1838 srela = elf_section_data (p->sec)->sreloc;
1839 srela->size += p->count * sizeof (Elf32_External_Rela);
1840 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1841 info->flags |= DF_TEXTREL;
1842 }
1843 }
1844 }
1845
1846 local_got = elf_local_got_refcounts (ibfd);
1847 if (!local_got)
1848 continue;
1849
1850 symtab_hdr = &elf_symtab_hdr (ibfd);
1851 locsymcount = symtab_hdr->sh_info;
1852 end_local_got = local_got + locsymcount;
1853 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1854 s = htab->elf.sgot;
1855 srela = htab->elf.srelgot;
1856 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1857 {
1858 if (*local_got > 0)
1859 {
1860 *local_got = s->size;
1861 s->size += GOT_ENTRY_SIZE;
1862 if (*local_tls_type == GOT_TLS_GD)
1863 s->size += GOT_ENTRY_SIZE;
1864 if (bfd_link_pic (info))
1865 srela->size += sizeof (Elf32_External_Rela);
1866 }
1867 else
1868 *local_got = (bfd_vma) -1;
1869 }
1870 local_plt = elf_s390_local_plt (ibfd);
1871 for (i = 0; i < symtab_hdr->sh_info; i++)
1872 {
1873 if (local_plt[i].plt.refcount > 0)
1874 {
1875 local_plt[i].plt.offset = htab->elf.iplt->size;
1876 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1877 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1878 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1879 }
1880 else
1881 local_plt[i].plt.offset = (bfd_vma) -1;
1882 }
1883 }
1884
1885 if (htab->tls_ldm_got.refcount > 0)
1886 {
1887 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1888 relocs. */
1889 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1890 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1891 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1892 }
1893 else
1894 htab->tls_ldm_got.offset = -1;
1895
1896 /* Allocate global sym .plt and .got entries, and space for global
1897 sym dynamic relocs. */
1898 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1899
1900 /* We now have determined the sizes of the various dynamic sections.
1901 Allocate memory for them. */
1902 relocs = false;
1903 for (s = dynobj->sections; s != NULL; s = s->next)
1904 {
1905 if ((s->flags & SEC_LINKER_CREATED) == 0)
1906 continue;
1907
1908 if (s == htab->elf.splt
1909 || s == htab->elf.sgot
1910 || s == htab->elf.sgotplt
1911 || s == htab->elf.sdynbss
1912 || s == htab->elf.sdynrelro
1913 || s == htab->elf.iplt
1914 || s == htab->elf.igotplt
1915 || s == htab->irelifunc)
1916 {
1917 /* Strip this section if we don't need it; see the
1918 comment below. */
1919 }
1920 else if (startswith (bfd_section_name (s), ".rela"))
1921 {
1922 if (s->size != 0)
1923 relocs = true;
1924
1925 /* We use the reloc_count field as a counter if we need
1926 to copy relocs into the output file. */
1927 s->reloc_count = 0;
1928 }
1929 else
1930 {
1931 /* It's not one of our sections, so don't allocate space. */
1932 continue;
1933 }
1934
1935 if (s->size == 0)
1936 {
1937 /* If we don't need this section, strip it from the
1938 output file. This is to handle .rela.bss and
1939 .rela.plt. We must create it in
1940 create_dynamic_sections, because it must be created
1941 before the linker maps input sections to output
1942 sections. The linker does that before
1943 adjust_dynamic_symbol is called, and it is that
1944 function which decides whether anything needs to go
1945 into these sections. */
1946
1947 s->flags |= SEC_EXCLUDE;
1948 continue;
1949 }
1950
1951 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1952 continue;
1953
1954 /* Allocate memory for the section contents. We use bfd_zalloc
1955 here in case unused entries are not reclaimed before the
1956 section's contents are written out. This should not happen,
1957 but this way if it does, we get a R_390_NONE reloc instead
1958 of garbage. */
1959 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1960 if (s->contents == NULL)
1961 return false;
1962 }
1963
1964 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
1965 }
1966
1967 /* Return the base VMA address which should be subtracted from real addresses
1968 when resolving @dtpoff relocation.
1969 This is PT_TLS segment p_vaddr. */
1970
1971 static bfd_vma
1972 dtpoff_base (struct bfd_link_info *info)
1973 {
1974 /* If tls_sec is NULL, we should have signalled an error already. */
1975 if (elf_hash_table (info)->tls_sec == NULL)
1976 return 0;
1977 return elf_hash_table (info)->tls_sec->vma;
1978 }
1979
1980 /* Return the relocation value for @tpoff relocation
1981 if STT_TLS virtual address is ADDRESS. */
1982
1983 static bfd_vma
1984 tpoff (struct bfd_link_info *info, bfd_vma address)
1985 {
1986 struct elf_link_hash_table *htab = elf_hash_table (info);
1987
1988 /* If tls_sec is NULL, we should have signalled an error already. */
1989 if (htab->tls_sec == NULL)
1990 return 0;
1991 return htab->tls_size + htab->tls_sec->vma - address;
1992 }
1993
1994 /* Complain if TLS instruction relocation is against an invalid
1995 instruction. */
1996
1997 static void
1998 invalid_tls_insn (bfd *input_bfd,
1999 asection *input_section,
2000 Elf_Internal_Rela *rel)
2001 {
2002 reloc_howto_type *howto;
2003
2004 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2005 _bfd_error_handler
2006 /* xgettext:c-format */
2007 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2008 input_bfd,
2009 input_section,
2010 (uint64_t) rel->r_offset,
2011 howto->name);
2012 bfd_set_error (bfd_error_bad_value);
2013 }
2014
2015 /* Relocate a 390 ELF section. */
2016
2017 static int
2018 elf_s390_relocate_section (bfd *output_bfd,
2019 struct bfd_link_info *info,
2020 bfd *input_bfd,
2021 asection *input_section,
2022 bfd_byte *contents,
2023 Elf_Internal_Rela *relocs,
2024 Elf_Internal_Sym *local_syms,
2025 asection **local_sections)
2026 {
2027 struct elf_s390_link_hash_table *htab;
2028 Elf_Internal_Shdr *symtab_hdr;
2029 struct elf_link_hash_entry **sym_hashes;
2030 bfd_vma *local_got_offsets;
2031 Elf_Internal_Rela *rel;
2032 Elf_Internal_Rela *relend;
2033
2034 if (!is_s390_elf (input_bfd))
2035 {
2036 bfd_set_error (bfd_error_wrong_format);
2037 return false;
2038 }
2039
2040 htab = elf_s390_hash_table (info);
2041 symtab_hdr = &elf_symtab_hdr (input_bfd);
2042 sym_hashes = elf_sym_hashes (input_bfd);
2043 local_got_offsets = elf_local_got_offsets (input_bfd);
2044
2045 rel = relocs;
2046 relend = relocs + input_section->reloc_count;
2047 for (; rel < relend; rel++)
2048 {
2049 unsigned int r_type;
2050 reloc_howto_type *howto;
2051 unsigned long r_symndx;
2052 struct elf_link_hash_entry *h;
2053 Elf_Internal_Sym *sym;
2054 asection *sec;
2055 bfd_vma off;
2056 bfd_vma relocation;
2057 bool unresolved_reloc;
2058 bfd_reloc_status_type r;
2059 int tls_type;
2060 asection *base_got = htab->elf.sgot;
2061 bool resolved_to_zero;
2062
2063 r_type = ELF32_R_TYPE (rel->r_info);
2064 if (r_type == (int) R_390_GNU_VTINHERIT
2065 || r_type == (int) R_390_GNU_VTENTRY)
2066 continue;
2067 if (r_type >= (int) R_390_max)
2068 {
2069 bfd_set_error (bfd_error_bad_value);
2070 return false;
2071 }
2072
2073 howto = elf_howto_table + r_type;
2074 r_symndx = ELF32_R_SYM (rel->r_info);
2075
2076 h = NULL;
2077 sym = NULL;
2078 sec = NULL;
2079 unresolved_reloc = false;
2080 if (r_symndx < symtab_hdr->sh_info)
2081 {
2082 sym = local_syms + r_symndx;
2083 sec = local_sections[r_symndx];
2084 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2085 {
2086 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2087 if (local_plt == NULL)
2088 return false;
2089
2090 /* Address of the PLT slot. */
2091 relocation = (htab->elf.iplt->output_section->vma
2092 + htab->elf.iplt->output_offset
2093 + local_plt[r_symndx].plt.offset);
2094
2095 switch (r_type)
2096 {
2097 case R_390_PLTOFF16:
2098 case R_390_PLTOFF32:
2099 relocation -= htab->elf.sgot->output_section->vma;
2100 break;
2101 case R_390_GOTPLT12:
2102 case R_390_GOTPLT16:
2103 case R_390_GOTPLT20:
2104 case R_390_GOTPLT32:
2105 case R_390_GOTPLTENT:
2106 case R_390_GOT12:
2107 case R_390_GOT16:
2108 case R_390_GOT20:
2109 case R_390_GOT32:
2110 case R_390_GOTENT:
2111 {
2112 /* Write the PLT slot address into the GOT slot. */
2113 bfd_put_32 (output_bfd, relocation,
2114 htab->elf.sgot->contents +
2115 local_got_offsets[r_symndx]);
2116 relocation = (local_got_offsets[r_symndx] +
2117 htab->elf.sgot->output_offset);
2118
2119 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2120 relocation += htab->elf.sgot->output_section->vma;
2121 break;
2122 }
2123 default:
2124 break;
2125 }
2126 /* The output section is needed later in
2127 finish_dynamic_section when creating the dynamic
2128 relocation. */
2129 local_plt[r_symndx].sec = sec;
2130 goto do_relocation;
2131 }
2132 else
2133 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2134 }
2135 else
2136 {
2137 bool warned ATTRIBUTE_UNUSED;
2138 bool ignored ATTRIBUTE_UNUSED;
2139
2140 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2141 r_symndx, symtab_hdr, sym_hashes,
2142 h, sec, relocation,
2143 unresolved_reloc, warned, ignored);
2144 }
2145
2146 if (sec != NULL && discarded_section (sec))
2147 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2148 rel, 1, relend, howto, 0, contents);
2149
2150 if (bfd_link_relocatable (info))
2151 continue;
2152
2153 resolved_to_zero = (h != NULL
2154 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2155
2156 switch (r_type)
2157 {
2158 case R_390_GOTPLT12:
2159 case R_390_GOTPLT16:
2160 case R_390_GOTPLT20:
2161 case R_390_GOTPLT32:
2162 case R_390_GOTPLTENT:
2163 /* There are three cases for a GOTPLT relocation. 1) The
2164 relocation is against the jump slot entry of a plt that
2165 will get emitted to the output file. 2) The relocation
2166 is against the jump slot of a plt entry that has been
2167 removed. elf_s390_adjust_gotplt has created a GOT entry
2168 as replacement. 3) The relocation is against a local symbol.
2169 Cases 2) and 3) are the same as the GOT relocation code
2170 so we just have to test for case 1 and fall through for
2171 the other two. */
2172 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2173 {
2174 bfd_vma plt_index;
2175
2176 if (s390_is_ifunc_symbol_p (h))
2177 {
2178 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2179 relocation = (plt_index * GOT_ENTRY_SIZE +
2180 htab->elf.igotplt->output_offset);
2181 if (r_type == R_390_GOTPLTENT)
2182 relocation += htab->elf.igotplt->output_section->vma;
2183 }
2184 else
2185 {
2186 /* Calc. index no.
2187 Current offset - size first entry / entry size. */
2188 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2189 PLT_ENTRY_SIZE;
2190
2191 /* Offset in GOT is PLT index plus GOT headers(3)
2192 times 4, addr & GOT addr. */
2193 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2194 if (r_type == R_390_GOTPLTENT)
2195 relocation += htab->elf.sgot->output_section->vma;
2196 }
2197 unresolved_reloc = false;
2198
2199 }
2200 /* Fall through. */
2201
2202 case R_390_GOT12:
2203 case R_390_GOT16:
2204 case R_390_GOT20:
2205 case R_390_GOT32:
2206 case R_390_GOTENT:
2207 /* Relocation is to the entry for this symbol in the global
2208 offset table. */
2209 if (base_got == NULL)
2210 abort ();
2211
2212 if (h != NULL)
2213 {
2214 bool dyn;
2215
2216 off = h->got.offset;
2217 dyn = htab->elf.dynamic_sections_created;
2218
2219 if (s390_is_ifunc_symbol_p (h))
2220 {
2221 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2222 if (off == (bfd_vma)-1)
2223 {
2224 /* No explicit GOT usage so redirect to the
2225 got.iplt slot. */
2226 base_got = htab->elf.igotplt;
2227 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2228 }
2229 else
2230 {
2231 /* Explicit GOT slots must contain the address
2232 of the PLT slot. This will be handled in
2233 finish_dynamic_symbol. */
2234 }
2235 }
2236 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2237 bfd_link_pic (info),
2238 h)
2239 || SYMBOL_REFERENCES_LOCAL (info, h)
2240 || resolved_to_zero)
2241 {
2242 /* This is actually a static link, or it is a
2243 -Bsymbolic link and the symbol is defined
2244 locally, or the symbol was forced to be local
2245 because of a version file. We must initialize
2246 this entry in the global offset table. Since the
2247 offset must always be a multiple of 2, we use the
2248 least significant bit to record whether we have
2249 initialized it already.
2250
2251 When doing a dynamic link, we create a .rel.got
2252 relocation entry to initialize the value. This
2253 is done in the finish_dynamic_symbol routine. */
2254 if ((off & 1) != 0)
2255 off &= ~1;
2256 else
2257 {
2258 bfd_put_32 (output_bfd, relocation,
2259 base_got->contents + off);
2260 h->got.offset |= 1;
2261 }
2262
2263 if ((h->def_regular
2264 && SYMBOL_REFERENCES_LOCAL (info, h))
2265 /* lrl rx,sym@GOTENT -> larl rx, sym */
2266 && ((r_type == R_390_GOTENT
2267 && (bfd_get_16 (input_bfd,
2268 contents + rel->r_offset - 2)
2269 & 0xff0f) == 0xc40d)
2270 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2271 || (r_type == R_390_GOT20
2272 && (bfd_get_32 (input_bfd,
2273 contents + rel->r_offset - 2)
2274 & 0xff00f000) == 0xe300c000
2275 && bfd_get_8 (input_bfd,
2276 contents + rel->r_offset + 3) == 0x58)))
2277 {
2278 unsigned short new_insn =
2279 (0xc000 | (bfd_get_8 (input_bfd,
2280 contents + rel->r_offset - 1) & 0xf0));
2281 bfd_put_16 (output_bfd, new_insn,
2282 contents + rel->r_offset - 2);
2283 r_type = R_390_PC32DBL;
2284 rel->r_addend = 2;
2285 howto = elf_howto_table + r_type;
2286 relocation = h->root.u.def.value
2287 + h->root.u.def.section->output_section->vma
2288 + h->root.u.def.section->output_offset;
2289 goto do_relocation;
2290 }
2291 }
2292 else
2293 unresolved_reloc = false;
2294 }
2295 else
2296 {
2297 if (local_got_offsets == NULL)
2298 abort ();
2299
2300 off = local_got_offsets[r_symndx];
2301
2302 /* The offset must always be a multiple of 4. We use
2303 the least significant bit to record whether we have
2304 already generated the necessary reloc. */
2305 if ((off & 1) != 0)
2306 off &= ~1;
2307 else
2308 {
2309 bfd_put_32 (output_bfd, relocation,
2310 htab->elf.sgot->contents + off);
2311
2312 if (bfd_link_pic (info))
2313 {
2314 asection *srelgot;
2315 Elf_Internal_Rela outrel;
2316 bfd_byte *loc;
2317
2318 srelgot = htab->elf.srelgot;
2319 if (srelgot == NULL)
2320 abort ();
2321
2322 outrel.r_offset = (htab->elf.sgot->output_section->vma
2323 + htab->elf.sgot->output_offset
2324 + off);
2325 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2326 outrel.r_addend = relocation;
2327 loc = srelgot->contents;
2328 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2329 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2330 }
2331
2332 local_got_offsets[r_symndx] |= 1;
2333 }
2334 }
2335
2336 if (off >= (bfd_vma) -2)
2337 abort ();
2338
2339 relocation = base_got->output_offset + off;
2340
2341 /* For @GOTENT the relocation is against the offset between
2342 the instruction and the symbols entry in the GOT and not
2343 between the start of the GOT and the symbols entry. We
2344 add the vma of the GOT to get the correct value. */
2345 if ( r_type == R_390_GOTENT
2346 || r_type == R_390_GOTPLTENT)
2347 relocation += base_got->output_section->vma;
2348
2349 break;
2350
2351 case R_390_GOTOFF16:
2352 case R_390_GOTOFF32:
2353 /* Relocation is relative to the start of the global offset
2354 table. */
2355
2356 if (h != NULL
2357 && s390_is_ifunc_symbol_p (h)
2358 && h->def_regular
2359 && !bfd_link_executable (info))
2360 {
2361 relocation = (htab->elf.iplt->output_section->vma
2362 + htab->elf.iplt->output_offset
2363 + h->plt.offset
2364 - htab->elf.sgot->output_section->vma);
2365 goto do_relocation;
2366 }
2367
2368 /* Note that sgot->output_offset is not involved in this
2369 calculation. We always want the start of .got. If we
2370 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2371 permitted by the ABI, we might have to change this
2372 calculation. */
2373 relocation -= htab->elf.sgot->output_section->vma;
2374 break;
2375
2376 case R_390_GOTPC:
2377 case R_390_GOTPCDBL:
2378 /* Use global offset table as symbol value. */
2379 relocation = htab->elf.sgot->output_section->vma;
2380 unresolved_reloc = false;
2381 break;
2382
2383 case R_390_PLT12DBL:
2384 case R_390_PLT16DBL:
2385 case R_390_PLT24DBL:
2386 case R_390_PLT32DBL:
2387 case R_390_PLT32:
2388 /* Relocation is to the entry for this symbol in the
2389 procedure linkage table. */
2390
2391 /* Resolve a PLT32 reloc against a local symbol directly,
2392 without using the procedure linkage table. */
2393 if (h == NULL)
2394 break;
2395
2396 if (h->plt.offset == (bfd_vma) -1
2397 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2398 {
2399 /* We didn't make a PLT entry for this symbol. This
2400 happens when statically linking PIC code, or when
2401 using -Bsymbolic. */
2402 break;
2403 }
2404
2405 if (s390_is_ifunc_symbol_p (h))
2406 relocation = (htab->elf.iplt->output_section->vma
2407 + htab->elf.iplt->output_offset
2408 + h->plt.offset);
2409 else
2410 relocation = (htab->elf.splt->output_section->vma
2411 + htab->elf.splt->output_offset
2412 + h->plt.offset);
2413 unresolved_reloc = false;
2414 break;
2415
2416 case R_390_PLTOFF16:
2417 case R_390_PLTOFF32:
2418 /* Relocation is to the entry for this symbol in the
2419 procedure linkage table relative to the start of the GOT. */
2420
2421 /* For local symbols or if we didn't make a PLT entry for
2422 this symbol resolve the symbol directly. */
2423 if (h == NULL
2424 || h->plt.offset == (bfd_vma) -1
2425 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2426 {
2427 relocation -= htab->elf.sgot->output_section->vma;
2428 break;
2429 }
2430
2431 if (s390_is_ifunc_symbol_p (h))
2432 relocation = (htab->elf.iplt->output_section->vma
2433 + htab->elf.iplt->output_offset
2434 + h->plt.offset
2435 - htab->elf.sgot->output_section->vma);
2436 else
2437 relocation = (htab->elf.splt->output_section->vma
2438 + htab->elf.splt->output_offset
2439 + h->plt.offset
2440 - htab->elf.sgot->output_section->vma);
2441 unresolved_reloc = false;
2442 break;
2443
2444 case R_390_PC16:
2445 case R_390_PC12DBL:
2446 case R_390_PC16DBL:
2447 case R_390_PC24DBL:
2448 case R_390_PC32DBL:
2449 case R_390_PC32:
2450 if (h != NULL
2451 && s390_is_ifunc_symbol_p (h)
2452 && h->def_regular
2453 && !bfd_link_executable (info))
2454 {
2455 /* This will not work our if the function does not
2456 happen to set up the GOT pointer for some other
2457 reason. 31 bit PLT entries require r12 to hold the
2458 GOT pointer.
2459 FIXME: Implement an errorcheck.
2460 NOTE: It will work when brasl is not available
2461 (e.g. with -m31 -march=g5) since a local function
2462 call then does use GOTOFF which implies r12 being set
2463 up. */
2464 relocation = (htab->elf.iplt->output_section->vma
2465 + htab->elf.iplt->output_offset
2466 + h ->plt.offset);
2467 goto do_relocation;
2468 }
2469 /* Fall through. */
2470
2471 case R_390_8:
2472 case R_390_16:
2473 case R_390_32:
2474 if ((input_section->flags & SEC_ALLOC) == 0)
2475 break;
2476
2477 if (h != NULL
2478 && s390_is_ifunc_symbol_p (h)
2479 && h->def_regular)
2480 {
2481 if (!bfd_link_pic (info))
2482 {
2483 /* For a non-shared object STT_GNU_IFUNC symbol must
2484 go through PLT. */
2485 relocation = (htab->elf.iplt->output_section->vma
2486 + htab->elf.iplt->output_offset
2487 + h ->plt.offset);
2488 goto do_relocation;
2489 }
2490 else
2491 {
2492 /* For shared objects a runtime relocation is needed. */
2493
2494 Elf_Internal_Rela outrel;
2495 asection *sreloc;
2496
2497 /* Need a dynamic relocation to get the real function
2498 address. */
2499 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2500 info,
2501 input_section,
2502 rel->r_offset);
2503 if (outrel.r_offset == (bfd_vma) -1
2504 || outrel.r_offset == (bfd_vma) -2)
2505 abort ();
2506
2507 outrel.r_offset += (input_section->output_section->vma
2508 + input_section->output_offset);
2509
2510 if (h->dynindx == -1
2511 || h->forced_local
2512 || bfd_link_executable (info))
2513 {
2514 /* This symbol is resolved locally. */
2515 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2516 outrel.r_addend = (h->root.u.def.value
2517 + h->root.u.def.section->output_section->vma
2518 + h->root.u.def.section->output_offset);
2519 }
2520 else
2521 {
2522 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2523 outrel.r_addend = 0;
2524 }
2525
2526 sreloc = htab->elf.irelifunc;
2527 elf_append_rela (output_bfd, sreloc, &outrel);
2528
2529 /* If this reloc is against an external symbol, we
2530 do not want to fiddle with the addend. Otherwise,
2531 we need to include the symbol value so that it
2532 becomes an addend for the dynamic reloc. For an
2533 internal symbol, we have updated addend. */
2534 continue;
2535 }
2536 }
2537
2538 if ((bfd_link_pic (info)
2539 && (h == NULL
2540 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2541 && !resolved_to_zero)
2542 || h->root.type != bfd_link_hash_undefweak)
2543 && ((r_type != R_390_PC16
2544 && r_type != R_390_PC12DBL
2545 && r_type != R_390_PC16DBL
2546 && r_type != R_390_PC24DBL
2547 && r_type != R_390_PC32DBL
2548 && r_type != R_390_PC32)
2549 || !SYMBOL_CALLS_LOCAL (info, h)))
2550 || (ELIMINATE_COPY_RELOCS
2551 && !bfd_link_pic (info)
2552 && h != NULL
2553 && h->dynindx != -1
2554 && !h->non_got_ref
2555 && ((h->def_dynamic
2556 && !h->def_regular)
2557 || h->root.type == bfd_link_hash_undefweak
2558 || h->root.type == bfd_link_hash_undefined)))
2559 {
2560 Elf_Internal_Rela outrel;
2561 bool skip, relocate;
2562 asection *sreloc;
2563 bfd_byte *loc;
2564
2565 /* When generating a shared object, these relocations
2566 are copied into the output file to be resolved at run
2567 time. */
2568
2569 skip = false;
2570 relocate = false;
2571
2572 outrel.r_offset =
2573 _bfd_elf_section_offset (output_bfd, info, input_section,
2574 rel->r_offset);
2575 if (outrel.r_offset == (bfd_vma) -1)
2576 skip = true;
2577 else if (outrel.r_offset == (bfd_vma) -2)
2578 skip = true, relocate = true;
2579 outrel.r_offset += (input_section->output_section->vma
2580 + input_section->output_offset);
2581
2582 if (skip)
2583 memset (&outrel, 0, sizeof outrel);
2584 else if (h != NULL
2585 && h->dynindx != -1
2586 && (r_type == R_390_PC16
2587 || r_type == R_390_PC12DBL
2588 || r_type == R_390_PC16DBL
2589 || r_type == R_390_PC24DBL
2590 || r_type == R_390_PC32DBL
2591 || r_type == R_390_PC32
2592 || !bfd_link_pic (info)
2593 || !SYMBOLIC_BIND (info, h)
2594 || !h->def_regular))
2595 {
2596 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2597 outrel.r_addend = rel->r_addend;
2598 }
2599 else
2600 {
2601 /* This symbol is local, or marked to become local. */
2602 outrel.r_addend = relocation + rel->r_addend;
2603 if (r_type == R_390_32)
2604 {
2605 relocate = true;
2606 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2607 }
2608 else
2609 {
2610 long sindx;
2611
2612 if (bfd_is_abs_section (sec))
2613 sindx = 0;
2614 else if (sec == NULL || sec->owner == NULL)
2615 {
2616 bfd_set_error(bfd_error_bad_value);
2617 return false;
2618 }
2619 else
2620 {
2621 asection *osec;
2622
2623 osec = sec->output_section;
2624 sindx = elf_section_data (osec)->dynindx;
2625 if (sindx == 0)
2626 {
2627 osec = htab->elf.text_index_section;
2628 sindx = elf_section_data (osec)->dynindx;
2629 }
2630 BFD_ASSERT (sindx != 0);
2631
2632 /* We are turning this relocation into one
2633 against a section symbol, so subtract out
2634 the output section's address but not the
2635 offset of the input section in the output
2636 section. */
2637 outrel.r_addend -= osec->vma;
2638 }
2639 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2640 }
2641 }
2642
2643 sreloc = elf_section_data (input_section)->sreloc;
2644 if (sreloc == NULL)
2645 abort ();
2646
2647 loc = sreloc->contents;
2648 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2649 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2650
2651 /* If this reloc is against an external symbol, we do
2652 not want to fiddle with the addend. Otherwise, we
2653 need to include the symbol value so that it becomes
2654 an addend for the dynamic reloc. */
2655 if (! relocate)
2656 continue;
2657 }
2658 break;
2659
2660 /* Relocations for tls literal pool entries. */
2661 case R_390_TLS_IE32:
2662 if (bfd_link_pic (info))
2663 {
2664 Elf_Internal_Rela outrel;
2665 asection *sreloc;
2666 bfd_byte *loc;
2667
2668 outrel.r_offset = rel->r_offset
2669 + input_section->output_section->vma
2670 + input_section->output_offset;
2671 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2672 sreloc = elf_section_data (input_section)->sreloc;
2673 if (sreloc == NULL)
2674 abort ();
2675 loc = sreloc->contents;
2676 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2677 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2678 }
2679 /* Fall through. */
2680
2681 case R_390_TLS_GD32:
2682 case R_390_TLS_GOTIE32:
2683 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2684 tls_type = GOT_UNKNOWN;
2685 if (h == NULL && local_got_offsets)
2686 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2687 else if (h != NULL)
2688 {
2689 tls_type = elf_s390_hash_entry(h)->tls_type;
2690 if (!bfd_link_pic (info)
2691 && h->dynindx == -1
2692 && tls_type >= GOT_TLS_IE)
2693 r_type = R_390_TLS_LE32;
2694 }
2695 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2696 r_type = R_390_TLS_IE32;
2697
2698 if (r_type == R_390_TLS_LE32)
2699 {
2700 /* This relocation gets optimized away by the local exec
2701 access optimization. */
2702 BFD_ASSERT (! unresolved_reloc);
2703 bfd_put_32 (output_bfd, -tpoff (info, relocation) + rel->r_addend,
2704 contents + rel->r_offset);
2705 continue;
2706 }
2707
2708 if (htab->elf.sgot == NULL)
2709 abort ();
2710
2711 if (h != NULL)
2712 off = h->got.offset;
2713 else
2714 {
2715 if (local_got_offsets == NULL)
2716 abort ();
2717
2718 off = local_got_offsets[r_symndx];
2719 }
2720
2721 emit_tls_relocs:
2722
2723 if ((off & 1) != 0)
2724 off &= ~1;
2725 else
2726 {
2727 Elf_Internal_Rela outrel;
2728 bfd_byte *loc;
2729 int dr_type, indx;
2730
2731 if (htab->elf.srelgot == NULL)
2732 abort ();
2733
2734 outrel.r_offset = (htab->elf.sgot->output_section->vma
2735 + htab->elf.sgot->output_offset + off);
2736
2737 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2738 if (r_type == R_390_TLS_GD32)
2739 dr_type = R_390_TLS_DTPMOD;
2740 else
2741 dr_type = R_390_TLS_TPOFF;
2742 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2743 outrel.r_addend = relocation - dtpoff_base (info);
2744 else
2745 outrel.r_addend = 0;
2746 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2747 loc = htab->elf.srelgot->contents;
2748 loc += htab->elf.srelgot->reloc_count++
2749 * sizeof (Elf32_External_Rela);
2750 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2751
2752 if (r_type == R_390_TLS_GD32)
2753 {
2754 if (indx == 0)
2755 {
2756 BFD_ASSERT (! unresolved_reloc);
2757 bfd_put_32 (output_bfd,
2758 relocation - dtpoff_base (info),
2759 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2760 }
2761 else
2762 {
2763 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2764 outrel.r_offset += GOT_ENTRY_SIZE;
2765 outrel.r_addend = 0;
2766 htab->elf.srelgot->reloc_count++;
2767 loc += sizeof (Elf32_External_Rela);
2768 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2769 }
2770 }
2771
2772 if (h != NULL)
2773 h->got.offset |= 1;
2774 else
2775 local_got_offsets[r_symndx] |= 1;
2776 }
2777
2778 if (off >= (bfd_vma) -2)
2779 abort ();
2780 if (r_type == ELF32_R_TYPE (rel->r_info))
2781 {
2782 relocation = htab->elf.sgot->output_offset + off;
2783 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2784 relocation += htab->elf.sgot->output_section->vma;
2785 unresolved_reloc = false;
2786 }
2787 else
2788 {
2789 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2790 contents + rel->r_offset);
2791 continue;
2792 }
2793 break;
2794
2795 case R_390_TLS_GOTIE12:
2796 case R_390_TLS_GOTIE20:
2797 case R_390_TLS_IEENT:
2798 if (h == NULL)
2799 {
2800 if (local_got_offsets == NULL)
2801 abort();
2802 off = local_got_offsets[r_symndx];
2803 if (bfd_link_pic (info))
2804 goto emit_tls_relocs;
2805 }
2806 else
2807 {
2808 off = h->got.offset;
2809 tls_type = elf_s390_hash_entry(h)->tls_type;
2810 if (bfd_link_pic (info)
2811 || h->dynindx != -1
2812 || tls_type < GOT_TLS_IE)
2813 goto emit_tls_relocs;
2814 }
2815
2816 if (htab->elf.sgot == NULL)
2817 abort ();
2818
2819 BFD_ASSERT (! unresolved_reloc);
2820 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2821 htab->elf.sgot->contents + off);
2822 relocation = htab->elf.sgot->output_offset + off;
2823 if (r_type == R_390_TLS_IEENT)
2824 relocation += htab->elf.sgot->output_section->vma;
2825 unresolved_reloc = false;
2826 break;
2827
2828 case R_390_TLS_LDM32:
2829 if (! bfd_link_pic (info))
2830 /* The literal pool entry this relocation refers to gets ignored
2831 by the optimized code of the local exec model. Do nothing
2832 and the value will turn out zero. */
2833 continue;
2834
2835 if (htab->elf.sgot == NULL)
2836 abort ();
2837
2838 off = htab->tls_ldm_got.offset;
2839 if (off & 1)
2840 off &= ~1;
2841 else
2842 {
2843 Elf_Internal_Rela outrel;
2844 bfd_byte *loc;
2845
2846 if (htab->elf.srelgot == NULL)
2847 abort ();
2848
2849 outrel.r_offset = (htab->elf.sgot->output_section->vma
2850 + htab->elf.sgot->output_offset + off);
2851
2852 bfd_put_32 (output_bfd, 0,
2853 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2854 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2855 outrel.r_addend = 0;
2856 loc = htab->elf.srelgot->contents;
2857 loc += htab->elf.srelgot->reloc_count++
2858 * sizeof (Elf32_External_Rela);
2859 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2860 htab->tls_ldm_got.offset |= 1;
2861 }
2862 relocation = htab->elf.sgot->output_offset + off;
2863 unresolved_reloc = false;
2864 break;
2865
2866 case R_390_TLS_LE32:
2867 if (bfd_link_dll (info))
2868 {
2869 /* Linking a shared library with non-fpic code requires
2870 a R_390_TLS_TPOFF relocation. */
2871 Elf_Internal_Rela outrel;
2872 asection *sreloc;
2873 bfd_byte *loc;
2874 int indx;
2875
2876 outrel.r_offset = rel->r_offset
2877 + input_section->output_section->vma
2878 + input_section->output_offset;
2879 if (h != NULL && h->dynindx != -1)
2880 indx = h->dynindx;
2881 else
2882 indx = 0;
2883 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2884 if (indx == 0)
2885 outrel.r_addend = relocation - dtpoff_base (info);
2886 else
2887 outrel.r_addend = 0;
2888 sreloc = elf_section_data (input_section)->sreloc;
2889 if (sreloc == NULL)
2890 abort ();
2891 loc = sreloc->contents;
2892 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2893 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2894 }
2895 else
2896 {
2897 BFD_ASSERT (! unresolved_reloc);
2898 bfd_put_32 (output_bfd, -tpoff (info, relocation) + rel->r_addend,
2899 contents + rel->r_offset);
2900 }
2901 continue;
2902
2903 case R_390_TLS_LDO32:
2904 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
2905 relocation -= dtpoff_base (info);
2906 else
2907 /* When converting LDO to LE, we must negate. */
2908 relocation = -tpoff (info, relocation);
2909 break;
2910
2911 /* Relocations for tls instructions. */
2912 case R_390_TLS_LOAD:
2913 case R_390_TLS_GDCALL:
2914 case R_390_TLS_LDCALL:
2915 tls_type = GOT_UNKNOWN;
2916 if (h == NULL && local_got_offsets)
2917 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2918 else if (h != NULL)
2919 tls_type = elf_s390_hash_entry(h)->tls_type;
2920
2921 if (tls_type == GOT_TLS_GD)
2922 continue;
2923
2924 if (r_type == R_390_TLS_LOAD)
2925 {
2926 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
2927 {
2928 /* IE->LE transition. Four valid cases:
2929 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2930 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2931 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2932 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2933 unsigned int insn, ry;
2934
2935 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2936 if ((insn & 0xff00f000) == 0x58000000)
2937 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2938 ry = (insn & 0x000f0000);
2939 else if ((insn & 0xff0f0000) == 0x58000000)
2940 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2941 ry = (insn & 0x0000f000) << 4;
2942 else if ((insn & 0xff00f000) == 0x5800c000)
2943 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2944 ry = (insn & 0x000f0000);
2945 else if ((insn & 0xff0f0000) == 0x580c0000)
2946 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2947 ry = (insn & 0x0000f000) << 4;
2948 else
2949 {
2950 invalid_tls_insn (input_bfd, input_section, rel);
2951 return false;
2952 }
2953 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2954 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2955 }
2956 }
2957 else if (r_type == R_390_TLS_GDCALL)
2958 {
2959 unsigned int insn;
2960
2961 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2962 if ((insn & 0xff000fff) != 0x4d000000 &&
2963 (insn & 0xffff0000) != 0xc0e50000 &&
2964 (insn & 0xff000000) != 0x0d000000)
2965 {
2966 invalid_tls_insn (input_bfd, input_section, rel);
2967 return false;
2968 }
2969 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
2970 {
2971 if ((insn & 0xff000000) == 0x0d000000)
2972 {
2973 /* GD->LE transition.
2974 basr rx, ry -> nopr r7 */
2975 insn = 0x07070000 | (insn & 0xffff);
2976 }
2977 else if ((insn & 0xff000000) == 0x4d000000)
2978 {
2979 /* GD->LE transition.
2980 bas %r14,0(%rx,%r13) -> bc 0,0 */
2981 insn = 0x47000000;
2982 }
2983 else
2984 {
2985 /* GD->LE transition.
2986 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
2987 insn = 0xc0040000;
2988 bfd_put_16 (output_bfd, 0x0000,
2989 contents + rel->r_offset + 4);
2990 }
2991 }
2992 else
2993 {
2994 /* If basr is used in the pic case to invoke
2995 _tls_get_offset, something went wrong before. */
2996 if ((insn & 0xff000000) == 0x0d000000)
2997 {
2998 invalid_tls_insn (input_bfd, input_section, rel);
2999 return false;
3000 }
3001
3002 if ((insn & 0xff000000) == 0x4d000000)
3003 {
3004 /* GD->IE transition.
3005 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3006 insn = 0x5822c000;
3007 }
3008 else
3009 {
3010 /* GD->IE transition.
3011 brasl %r14,__tls_get_addr@plt ->
3012 l %r2,0(%r2,%r12) ; bcr 0,0 */
3013 insn = 0x5822c000;
3014 bfd_put_16 (output_bfd, 0x0700,
3015 contents + rel->r_offset + 4);
3016 }
3017 }
3018 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3019 }
3020 else if (r_type == R_390_TLS_LDCALL)
3021 {
3022 if (!bfd_link_pic (info))
3023 {
3024 unsigned int insn;
3025
3026 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3027 if ((insn & 0xff000fff) != 0x4d000000 &&
3028 (insn & 0xffff0000) != 0xc0e50000 &&
3029 (insn & 0xff000000) != 0x0d000000)
3030 {
3031 invalid_tls_insn (input_bfd, input_section, rel);
3032 return false;
3033 }
3034
3035 if ((insn & 0xff000000) == 0x0d000000)
3036 {
3037 /* LD->LE transition.
3038 basr rx, ry -> nopr r7 */
3039 insn = 0x07070000 | (insn & 0xffff);
3040 }
3041 else if ((insn & 0xff000000) == 0x4d000000)
3042 {
3043 /* LD->LE transition.
3044 bas %r14,0(%rx,%r13) -> bc 0,0 */
3045 insn = 0x47000000;
3046 }
3047 else
3048 {
3049 /* LD->LE transition.
3050 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3051 insn = 0xc0040000;
3052 bfd_put_16 (output_bfd, 0x0000,
3053 contents + rel->r_offset + 4);
3054 }
3055 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3056 }
3057 }
3058 continue;
3059
3060 default:
3061 break;
3062 }
3063
3064 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3065 because such sections are not SEC_ALLOC and thus ld.so will
3066 not process them. */
3067 if (unresolved_reloc
3068 && !((input_section->flags & SEC_DEBUGGING) != 0
3069 && h->def_dynamic)
3070 && _bfd_elf_section_offset (output_bfd, info, input_section,
3071 rel->r_offset) != (bfd_vma) -1)
3072 _bfd_error_handler
3073 /* xgettext:c-format */
3074 (_("%pB(%pA+%#" PRIx64 "): "
3075 "unresolvable %s relocation against symbol `%s'"),
3076 input_bfd,
3077 input_section,
3078 (uint64_t) rel->r_offset,
3079 howto->name,
3080 h->root.root.string);
3081
3082 do_relocation:
3083
3084 /* When applying a 24 bit reloc we need to start one byte
3085 earlier. Otherwise the 32 bit get/put bfd operations might
3086 access a byte after the actual section. */
3087 if (r_type == R_390_PC24DBL
3088 || r_type == R_390_PLT24DBL)
3089 rel->r_offset--;
3090
3091 if (r_type == R_390_20
3092 || r_type == R_390_GOT20
3093 || r_type == R_390_GOTPLT20
3094 || r_type == R_390_TLS_GOTIE20)
3095 {
3096 relocation += rel->r_addend;
3097 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3098 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3099 contents, rel->r_offset,
3100 relocation, 0);
3101 }
3102 else
3103 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3104 contents, rel->r_offset,
3105 relocation, rel->r_addend);
3106
3107 if (r != bfd_reloc_ok)
3108 {
3109 const char *name;
3110
3111 if (h != NULL)
3112 name = h->root.root.string;
3113 else
3114 {
3115 name = bfd_elf_string_from_elf_section (input_bfd,
3116 symtab_hdr->sh_link,
3117 sym->st_name);
3118 if (name == NULL)
3119 return false;
3120 if (*name == '\0')
3121 name = bfd_section_name (sec);
3122 }
3123
3124 if (r == bfd_reloc_overflow)
3125 (*info->callbacks->reloc_overflow)
3126 (info, (h ? &h->root : NULL), name, howto->name,
3127 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3128 else
3129 {
3130 _bfd_error_handler
3131 /* xgettext:c-format */
3132 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3133 input_bfd, input_section,
3134 (uint64_t) rel->r_offset, name, (int) r);
3135 return false;
3136 }
3137 }
3138 }
3139
3140 return true;
3141 }
3142
3143 /* Generate the PLT slots together with the dynamic relocations needed
3144 for IFUNC symbols. */
3145
3146 static void
3147 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3148 struct bfd_link_info *info,
3149 struct elf_link_hash_entry *h,
3150 struct elf_s390_link_hash_table *htab,
3151 bfd_vma iplt_offset,
3152 bfd_vma resolver_address)
3153 {
3154 bfd_vma iplt_index;
3155 bfd_vma got_offset;
3156 bfd_vma igotiplt_offset;
3157 Elf_Internal_Rela rela;
3158 bfd_byte *loc;
3159 asection *plt, *gotplt, *relplt;
3160 bfd_vma relative_offset;
3161
3162 if (htab->elf.iplt == NULL
3163 || htab->elf.igotplt == NULL
3164 || htab->elf.irelplt == NULL)
3165 abort ();
3166
3167 gotplt = htab->elf.igotplt;
3168 relplt = htab->elf.irelplt;
3169
3170 /* Index of the PLT slot within iplt section. */
3171 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3172 plt = htab->elf.iplt;
3173 /* Offset into the igot.plt section. */
3174 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3175 /* Offset into the got section. */
3176 got_offset = igotiplt_offset + gotplt->output_offset;
3177
3178 /* S390 uses halfwords for relative branch calc! */
3179 relative_offset = - (plt->output_offset +
3180 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3181 /* If offset is > 32768, branch to a previous branch
3182 390 can only handle +-64 K jumps. */
3183 if ( -32768 > (int) relative_offset )
3184 relative_offset
3185 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3186
3187 /* Fill in the entry in the procedure linkage table. */
3188 if (!bfd_link_pic (info))
3189 {
3190 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3191 PLT_ENTRY_SIZE);
3192
3193 /* Adjust jump to the first plt entry. */
3194 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3195 plt->contents + iplt_offset + 20);
3196
3197 /* Push the GOT offset field. */
3198 bfd_put_32 (output_bfd,
3199 (gotplt->output_section->vma
3200 + got_offset),
3201 plt->contents + iplt_offset + 24);
3202 }
3203 else if (got_offset < 4096)
3204 {
3205 /* The GOT offset is small enough to be used directly as
3206 displacement. */
3207 memcpy (plt->contents + iplt_offset,
3208 elf_s390_plt_pic12_entry,
3209 PLT_ENTRY_SIZE);
3210
3211 /* Put in the GOT offset as displacement value. The 0xc000
3212 value comes from the first word of the plt entry. Look
3213 at the elf_s390_plt_pic16_entry content. */
3214 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3215 plt->contents + iplt_offset + 2);
3216
3217 /* Adjust the jump to the first plt entry. */
3218 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3219 plt->contents + iplt_offset + 20);
3220 }
3221 else if (got_offset < 32768)
3222 {
3223 /* The GOT offset is too big for a displacement but small
3224 enough to be a signed 16 bit immediate value as it can be
3225 used in an lhi instruction. */
3226 memcpy (plt->contents + iplt_offset,
3227 elf_s390_plt_pic16_entry,
3228 PLT_ENTRY_SIZE);
3229
3230 /* Put in the GOT offset for the lhi instruction. */
3231 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3232 plt->contents + iplt_offset + 2);
3233
3234 /* Adjust the jump to the first plt entry. */
3235 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3236 plt->contents + iplt_offset + 20);
3237 }
3238 else
3239 {
3240 memcpy (plt->contents + iplt_offset,
3241 elf_s390_plt_pic_entry,
3242 PLT_ENTRY_SIZE);
3243
3244 /* Adjust the jump to the first plt entry. */
3245 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3246 plt->contents + iplt_offset + 20);
3247
3248 /* Push the GOT offset field. */
3249 bfd_put_32 (output_bfd, got_offset,
3250 plt->contents + iplt_offset + 24);
3251 }
3252 /* Insert offset into reloc. table here. */
3253 bfd_put_32 (output_bfd, relplt->output_offset +
3254 iplt_index * RELA_ENTRY_SIZE,
3255 plt->contents + iplt_offset + 28);
3256
3257 /* Fill in the entry in the global offset table.
3258 Points to instruction after GOT offset. */
3259 bfd_put_32 (output_bfd,
3260 (plt->output_section->vma
3261 + plt->output_offset
3262 + iplt_offset
3263 + 12),
3264 gotplt->contents + igotiplt_offset);
3265
3266 /* Fill in the entry in the .rela.plt section. */
3267 rela.r_offset = gotplt->output_section->vma + got_offset;
3268
3269 if (!h
3270 || h->dynindx == -1
3271 || ((bfd_link_executable (info)
3272 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3273 && h->def_regular))
3274 {
3275 /* The symbol can be locally resolved. */
3276 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3277 rela.r_addend = resolver_address;
3278 }
3279 else
3280 {
3281 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3282 rela.r_addend = 0;
3283 }
3284
3285 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3286 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3287 }
3288
3289 /* Finish up dynamic symbol handling. We set the contents of various
3290 dynamic sections here. */
3291
3292 static bool
3293 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3294 struct bfd_link_info *info,
3295 struct elf_link_hash_entry *h,
3296 Elf_Internal_Sym *sym)
3297 {
3298 struct elf_s390_link_hash_table *htab;
3299 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3300
3301 htab = elf_s390_hash_table (info);
3302
3303 if (h->plt.offset != (bfd_vma) -1)
3304 {
3305 bfd_vma plt_index;
3306 bfd_vma got_offset;
3307 Elf_Internal_Rela rela;
3308 bfd_byte *loc;
3309 bfd_vma relative_offset;
3310
3311 /* This symbol has an entry in the procedure linkage table. Set
3312 it up. */
3313 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3314 {
3315 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3316 htab, h->plt.offset,
3317 eh->ifunc_resolver_address +
3318 eh->ifunc_resolver_section->output_offset +
3319 eh->ifunc_resolver_section->output_section->vma);
3320 /* Do not return yet. Handling of explicit GOT slots of
3321 IFUNC symbols is below. */
3322 }
3323 else
3324 {
3325 if (h->dynindx == -1
3326 || htab->elf.splt == NULL
3327 || htab->elf.sgotplt == NULL
3328 || htab->elf.srelplt == NULL)
3329 abort ();
3330
3331 /* Calc. index no.
3332 Current offset - size first entry / entry size. */
3333 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3334
3335 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3336 addr & GOT addr. */
3337 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3338
3339 /* S390 uses halfwords for relative branch calc! */
3340 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3341 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3342 /* If offset is > 32768, branch to a previous branch
3343 390 can only handle +-64 K jumps. */
3344 if ( -32768 > (int) relative_offset )
3345 relative_offset
3346 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3347
3348 /* Fill in the entry in the procedure linkage table. */
3349 if (!bfd_link_pic (info))
3350 {
3351 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3352 PLT_ENTRY_SIZE);
3353
3354 /* Adjust jump to the first plt entry. */
3355 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3356 htab->elf.splt->contents + h->plt.offset + 20);
3357
3358 /* Push the GOT offset field. */
3359 bfd_put_32 (output_bfd,
3360 (htab->elf.sgotplt->output_section->vma
3361 + htab->elf.sgotplt->output_offset
3362 + got_offset),
3363 htab->elf.splt->contents + h->plt.offset + 24);
3364 }
3365 else if (got_offset < 4096)
3366 {
3367 /* The GOT offset is small enough to be used directly as
3368 displacement. */
3369 memcpy (htab->elf.splt->contents + h->plt.offset,
3370 elf_s390_plt_pic12_entry,
3371 PLT_ENTRY_SIZE);
3372
3373 /* Put in the GOT offset as displacement value. The 0xc000
3374 value comes from the first word of the plt entry. Look
3375 at the elf_s390_plt_pic12_entry content. */
3376 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3377 htab->elf.splt->contents + h->plt.offset + 2);
3378
3379 /* Adjust the jump to the first plt entry. */
3380 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3381 htab->elf.splt->contents + h->plt.offset + 20);
3382 }
3383 else if (got_offset < 32768)
3384 {
3385 /* The GOT offset is too big for a displacement but small
3386 enough to be a signed 16 bit immediate value as it can be
3387 used in an lhi instruction. */
3388 memcpy (htab->elf.splt->contents + h->plt.offset,
3389 elf_s390_plt_pic16_entry,
3390 PLT_ENTRY_SIZE);
3391
3392 /* Put in the GOT offset for the lhi instruction. */
3393 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3394 htab->elf.splt->contents + h->plt.offset + 2);
3395
3396 /* Adjust the jump to the first plt entry. */
3397 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3398 htab->elf.splt->contents + h->plt.offset + 20);
3399 }
3400 else
3401 {
3402 memcpy (htab->elf.splt->contents + h->plt.offset,
3403 elf_s390_plt_pic_entry,
3404 PLT_ENTRY_SIZE);
3405
3406 /* Adjust the jump to the first plt entry. */
3407 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3408 htab->elf.splt->contents + h->plt.offset + 20);
3409
3410 /* Push the GOT offset field. */
3411 bfd_put_32 (output_bfd, got_offset,
3412 htab->elf.splt->contents + h->plt.offset + 24);
3413 }
3414 /* Insert offset into reloc. table here. */
3415 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3416 htab->elf.splt->contents + h->plt.offset + 28);
3417
3418 /* Fill in the entry in the global offset table.
3419 Points to instruction after GOT offset. */
3420 bfd_put_32 (output_bfd,
3421 (htab->elf.splt->output_section->vma
3422 + htab->elf.splt->output_offset
3423 + h->plt.offset
3424 + 12),
3425 htab->elf.sgotplt->contents + got_offset);
3426
3427 /* Fill in the entry in the .rela.plt section. */
3428 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3429 + htab->elf.sgotplt->output_offset
3430 + got_offset);
3431 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3432 rela.r_addend = 0;
3433 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3434 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3435
3436 if (!h->def_regular)
3437 {
3438 /* Mark the symbol as undefined, rather than as defined in
3439 the .plt section. Leave the value alone. This is a clue
3440 for the dynamic linker, to make function pointer
3441 comparisons work between an application and shared
3442 library. */
3443 sym->st_shndx = SHN_UNDEF;
3444 }
3445 }
3446 }
3447
3448 if (h->got.offset != (bfd_vma) -1
3449 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3450 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3451 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3452 {
3453 Elf_Internal_Rela rela;
3454 bfd_byte *loc;
3455
3456 /* This symbol has an entry in the global offset table. Set it
3457 up. */
3458
3459 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3460 abort ();
3461
3462 rela.r_offset = (htab->elf.sgot->output_section->vma
3463 + htab->elf.sgot->output_offset
3464 + (h->got.offset &~ (bfd_vma) 1));
3465
3466 /* If this is a static link, or it is a -Bsymbolic link and the
3467 symbol is defined locally or was forced to be local because
3468 of a version file, we just want to emit a RELATIVE reloc.
3469 The entry in the global offset table will already have been
3470 initialized in the relocate_section function. */
3471 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3472 {
3473 if (bfd_link_pic (info))
3474 {
3475 /* An explicit GOT slot usage needs GLOB_DAT. If the
3476 symbol references local the implicit got.iplt slot
3477 will be used and the IRELATIVE reloc has been created
3478 above. */
3479 goto do_glob_dat;
3480 }
3481 else
3482 {
3483 /* For non-shared objects explicit GOT slots must be
3484 filled with the PLT slot address for pointer
3485 equality reasons. */
3486 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3487 + htab->elf.iplt->output_offset
3488 + h->plt.offset),
3489 htab->elf.sgot->contents + h->got.offset);
3490 return true;
3491 }
3492 }
3493 else if (SYMBOL_REFERENCES_LOCAL (info, h))
3494 {
3495 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3496 return true;
3497
3498 /* If this is a static link, or it is a -Bsymbolic link and
3499 the symbol is defined locally or was forced to be local
3500 because of a version file, we just want to emit a
3501 RELATIVE reloc. The entry in the global offset table
3502 will already have been initialized in the
3503 relocate_section function. */
3504 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3505 return false;
3506 BFD_ASSERT((h->got.offset & 1) != 0);
3507 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3508 rela.r_addend = (h->root.u.def.value
3509 + h->root.u.def.section->output_section->vma
3510 + h->root.u.def.section->output_offset);
3511 }
3512 else
3513 {
3514 BFD_ASSERT((h->got.offset & 1) == 0);
3515 do_glob_dat:
3516 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3517 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3518 rela.r_addend = 0;
3519 }
3520
3521 loc = htab->elf.srelgot->contents;
3522 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3523 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3524 }
3525
3526 if (h->needs_copy)
3527 {
3528 Elf_Internal_Rela rela;
3529 asection *s;
3530 bfd_byte *loc;
3531
3532 /* This symbols needs a copy reloc. Set it up. */
3533
3534 if (h->dynindx == -1
3535 || (h->root.type != bfd_link_hash_defined
3536 && h->root.type != bfd_link_hash_defweak)
3537 || htab->elf.srelbss == NULL
3538 || htab->elf.sreldynrelro == NULL)
3539 abort ();
3540
3541 rela.r_offset = (h->root.u.def.value
3542 + h->root.u.def.section->output_section->vma
3543 + h->root.u.def.section->output_offset);
3544 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3545 rela.r_addend = 0;
3546 if (h->root.u.def.section == htab->elf.sdynrelro)
3547 s = htab->elf.sreldynrelro;
3548 else
3549 s = htab->elf.srelbss;
3550 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3551 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3552 }
3553
3554 /* Mark some specially defined symbols as absolute. */
3555 if (h == htab->elf.hdynamic
3556 || h == htab->elf.hgot
3557 || h == htab->elf.hplt)
3558 sym->st_shndx = SHN_ABS;
3559
3560 return true;
3561 }
3562
3563 /* Used to decide how to sort relocs in an optimal manner for the
3564 dynamic linker, before writing them out. */
3565
3566 static enum elf_reloc_type_class
3567 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3568 const asection *rel_sec ATTRIBUTE_UNUSED,
3569 const Elf_Internal_Rela *rela)
3570 {
3571 bfd *abfd = info->output_bfd;
3572 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3573 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3574 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3575 Elf_Internal_Sym sym;
3576
3577 if (htab->elf.dynsym == NULL
3578 || !bed->s->swap_symbol_in (abfd,
3579 (htab->elf.dynsym->contents
3580 + r_symndx * bed->s->sizeof_sym),
3581 0, &sym))
3582 abort ();
3583
3584 /* Check relocation against STT_GNU_IFUNC symbol. */
3585 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3586 return reloc_class_ifunc;
3587
3588 switch ((int) ELF32_R_TYPE (rela->r_info))
3589 {
3590 case R_390_RELATIVE:
3591 return reloc_class_relative;
3592 case R_390_JMP_SLOT:
3593 return reloc_class_plt;
3594 case R_390_COPY:
3595 return reloc_class_copy;
3596 default:
3597 return reloc_class_normal;
3598 }
3599 }
3600
3601 /* Finish up the dynamic sections. */
3602
3603 static bool
3604 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3605 struct bfd_link_info *info)
3606 {
3607 struct elf_s390_link_hash_table *htab;
3608 bfd *dynobj;
3609 asection *sdyn;
3610 bfd *ibfd;
3611 unsigned int i;
3612
3613 htab = elf_s390_hash_table (info);
3614 dynobj = htab->elf.dynobj;
3615 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3616
3617 if (htab->elf.dynamic_sections_created)
3618 {
3619 Elf32_External_Dyn *dyncon, *dynconend;
3620
3621 if (sdyn == NULL || htab->elf.sgot == NULL)
3622 abort ();
3623
3624 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3625 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3626 for (; dyncon < dynconend; dyncon++)
3627 {
3628 Elf_Internal_Dyn dyn;
3629 asection *s;
3630
3631 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3632
3633 switch (dyn.d_tag)
3634 {
3635 default:
3636 continue;
3637
3638 case DT_PLTGOT:
3639 s = htab->elf.sgotplt;
3640 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3641 break;
3642
3643 case DT_JMPREL:
3644 s = htab->elf.srelplt;
3645 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3646 break;
3647
3648 case DT_PLTRELSZ:
3649 dyn.d_un.d_val = htab->elf.srelplt->size;
3650 if (htab->elf.irelplt)
3651 dyn.d_un.d_val += htab->elf.irelplt->size;
3652 break;
3653 }
3654
3655 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3656 }
3657
3658 /* Fill in the special first entry in the procedure linkage table. */
3659 if (htab->elf.splt && htab->elf.splt->size > 0)
3660 {
3661 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3662 if (bfd_link_pic (info))
3663 {
3664 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3665 PLT_FIRST_ENTRY_SIZE);
3666 }
3667 else
3668 {
3669 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3670 PLT_FIRST_ENTRY_SIZE);
3671 bfd_put_32 (output_bfd,
3672 htab->elf.sgotplt->output_section->vma
3673 + htab->elf.sgotplt->output_offset,
3674 htab->elf.splt->contents + 24);
3675 }
3676 elf_section_data (htab->elf.splt->output_section)
3677 ->this_hdr.sh_entsize = 4;
3678 }
3679
3680 }
3681
3682 if (htab->elf.sgotplt)
3683 {
3684 /* Fill in the first three entries in the global offset table. */
3685 if (htab->elf.sgotplt->size > 0)
3686 {
3687 bfd_put_32 (output_bfd,
3688 (sdyn == NULL ? (bfd_vma) 0
3689 : sdyn->output_section->vma + sdyn->output_offset),
3690 htab->elf.sgotplt->contents);
3691 /* One entry for shared object struct ptr. */
3692 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3693 /* One entry for _dl_runtime_resolve. */
3694 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3695 }
3696
3697 elf_section_data (htab->elf.sgotplt->output_section)
3698 ->this_hdr.sh_entsize = 4;
3699 }
3700 /* Finish dynamic symbol for local IFUNC symbols. */
3701 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3702 {
3703 struct plt_entry *local_plt;
3704 Elf_Internal_Sym *isym;
3705 Elf_Internal_Shdr *symtab_hdr;
3706
3707 symtab_hdr = &elf_symtab_hdr (ibfd);
3708
3709 if (!is_s390_elf (ibfd))
3710 continue;
3711
3712 local_plt = elf_s390_local_plt (ibfd);
3713 if (local_plt != NULL)
3714 for (i = 0; i < symtab_hdr->sh_info; i++)
3715 {
3716 if (local_plt[i].plt.offset != (bfd_vma) -1)
3717 {
3718 asection *sec = local_plt[i].sec;
3719 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, ibfd, i);
3720 if (isym == NULL)
3721 return false;
3722
3723 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3724 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3725 local_plt[i].plt.offset,
3726 isym->st_value
3727 + sec->output_section->vma
3728 + sec->output_offset);
3729
3730 }
3731 }
3732 }
3733 return true;
3734 }
3735 \f
3736 /* Support for core dump NOTE sections. */
3737
3738 static bool
3739 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3740 {
3741 int offset;
3742 unsigned int size;
3743
3744 switch (note->descsz)
3745 {
3746 default:
3747 return false;
3748
3749 case 224: /* S/390 Linux. */
3750 /* pr_cursig */
3751 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3752
3753 /* pr_pid */
3754 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3755
3756 /* pr_reg */
3757 offset = 72;
3758 size = 144;
3759 break;
3760 }
3761
3762 /* Make a ".reg/999" section. */
3763 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3764 size, note->descpos + offset);
3765 }
3766
3767 static bool
3768 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3769 {
3770 switch (note->descsz)
3771 {
3772 default:
3773 return false;
3774
3775 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3776 elf_tdata (abfd)->core->pid
3777 = bfd_get_32 (abfd, note->descdata + 12);
3778 elf_tdata (abfd)->core->program
3779 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3780 elf_tdata (abfd)->core->command
3781 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3782 break;
3783 }
3784
3785 /* Note that for some reason, a spurious space is tacked
3786 onto the end of the args in some (at least one anyway)
3787 implementations, so strip it off if it exists. */
3788
3789 {
3790 char *command = elf_tdata (abfd)->core->command;
3791 int n = strlen (command);
3792
3793 if (0 < n && command[n - 1] == ' ')
3794 command[n - 1] = '\0';
3795 }
3796
3797 return true;
3798 }
3799
3800 static char *
3801 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3802 int note_type, ...)
3803 {
3804 va_list ap;
3805
3806 switch (note_type)
3807 {
3808 default:
3809 return NULL;
3810
3811 case NT_PRPSINFO:
3812 {
3813 char data[124] ATTRIBUTE_NONSTRING = { 0 };
3814 const char *fname, *psargs;
3815
3816 va_start (ap, note_type);
3817 fname = va_arg (ap, const char *);
3818 psargs = va_arg (ap, const char *);
3819 va_end (ap);
3820
3821 strncpy (data + 28, fname, 16);
3822 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3823 DIAGNOSTIC_PUSH;
3824 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3825 -Wstringop-truncation:
3826 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3827 */
3828 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3829 #endif
3830 strncpy (data + 44, psargs, 80);
3831 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3832 DIAGNOSTIC_POP;
3833 #endif
3834 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3835 &data, sizeof (data));
3836 }
3837
3838 case NT_PRSTATUS:
3839 {
3840 char data[224] = { 0 };
3841 long pid;
3842 int cursig;
3843 const void *gregs;
3844
3845 va_start (ap, note_type);
3846 pid = va_arg (ap, long);
3847 cursig = va_arg (ap, int);
3848 gregs = va_arg (ap, const void *);
3849 va_end (ap);
3850
3851 bfd_put_16 (abfd, cursig, data + 12);
3852 bfd_put_32 (abfd, pid, data + 24);
3853 memcpy (data + 72, gregs, 144);
3854 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3855 &data, sizeof (data));
3856 }
3857 }
3858 /* NOTREACHED */
3859 }
3860 \f
3861 /* Return address for Ith PLT stub in section PLT, for relocation REL
3862 or (bfd_vma) -1 if it should not be included. */
3863
3864 static bfd_vma
3865 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3866 const arelent *rel ATTRIBUTE_UNUSED)
3867 {
3868 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3869 }
3870
3871 /* Merge backend specific data from an object file to the output
3872 object file when linking. */
3873
3874 static bool
3875 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3876 {
3877 bfd *obfd = info->output_bfd;
3878
3879 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3880 return true;
3881
3882 if (!elf_s390_merge_obj_attributes (ibfd, info))
3883 return false;
3884
3885 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3886 return true;
3887 }
3888
3889
3890 #define TARGET_BIG_SYM s390_elf32_vec
3891 #define TARGET_BIG_NAME "elf32-s390"
3892 #define ELF_ARCH bfd_arch_s390
3893 #define ELF_TARGET_ID S390_ELF_DATA
3894 #define ELF_MACHINE_CODE EM_S390
3895 #define ELF_MACHINE_ALT1 EM_S390_OLD
3896 #define ELF_MAXPAGESIZE 0x1000
3897
3898 #define elf_backend_can_gc_sections 1
3899 #define elf_backend_can_refcount 1
3900 #define elf_backend_want_got_plt 1
3901 #define elf_backend_plt_readonly 1
3902 #define elf_backend_want_plt_sym 0
3903 #define elf_backend_got_header_size 12
3904 #define elf_backend_want_dynrelro 1
3905 #define elf_backend_rela_normal 1
3906
3907 #define elf_info_to_howto elf_s390_info_to_howto
3908
3909 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3910 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3911 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3912 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3913
3914 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
3915
3916 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3917 #define elf_backend_check_relocs elf_s390_check_relocs
3918 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3919 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3920 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3921 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3922 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3923 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3924 #define elf_backend_relocate_section elf_s390_relocate_section
3925 #define elf_backend_late_size_sections elf_s390_late_size_sections
3926 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3927 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3928 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
3929 #define elf_backend_write_core_note elf_s390_write_core_note
3930 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3931 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3932
3933 #define bfd_elf32_mkobject elf_s390_mkobject
3934 #define elf_backend_object_p elf_s390_object_p
3935
3936 #define elf_backend_linux_prpsinfo32_ugid16 true
3937
3938 #include "elf32-target.h"
The GNU Binutils are a collection of binary tools.