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PR23652, Use symbols from debug bfd for _bfd_elf_find_function
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2019 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include <stdarg.h>
29
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
36
37 /* The relocation "howto" table. */
38
39 static reloc_howto_type elf_howto_table[] =
40 {
41 HOWTO (R_390_NONE, /* type */
42 0, /* rightshift */
43 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
44 0, /* bitsize */
45 FALSE, /* pc_relative */
46 0, /* bitpos */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
51 0, /* src_mask */
52 0, /* dst_mask */
53 FALSE), /* pcrel_offset */
54
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
172 };
173
174 /* GNU extension to record C++ vtable hierarchy. */
175 static reloc_howto_type elf32_s390_vtinherit_howto =
176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
177 static reloc_howto_type elf32_s390_vtentry_howto =
178 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
179
180 static reloc_howto_type *
181 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182 bfd_reloc_code_real_type code)
183 {
184 switch (code)
185 {
186 case BFD_RELOC_NONE:
187 return &elf_howto_table[(int) R_390_NONE];
188 case BFD_RELOC_8:
189 return &elf_howto_table[(int) R_390_8];
190 case BFD_RELOC_390_12:
191 return &elf_howto_table[(int) R_390_12];
192 case BFD_RELOC_16:
193 return &elf_howto_table[(int) R_390_16];
194 case BFD_RELOC_32:
195 return &elf_howto_table[(int) R_390_32];
196 case BFD_RELOC_CTOR:
197 return &elf_howto_table[(int) R_390_32];
198 case BFD_RELOC_32_PCREL:
199 return &elf_howto_table[(int) R_390_PC32];
200 case BFD_RELOC_390_GOT12:
201 return &elf_howto_table[(int) R_390_GOT12];
202 case BFD_RELOC_32_GOT_PCREL:
203 return &elf_howto_table[(int) R_390_GOT32];
204 case BFD_RELOC_390_PLT32:
205 return &elf_howto_table[(int) R_390_PLT32];
206 case BFD_RELOC_390_COPY:
207 return &elf_howto_table[(int) R_390_COPY];
208 case BFD_RELOC_390_GLOB_DAT:
209 return &elf_howto_table[(int) R_390_GLOB_DAT];
210 case BFD_RELOC_390_JMP_SLOT:
211 return &elf_howto_table[(int) R_390_JMP_SLOT];
212 case BFD_RELOC_390_RELATIVE:
213 return &elf_howto_table[(int) R_390_RELATIVE];
214 case BFD_RELOC_32_GOTOFF:
215 return &elf_howto_table[(int) R_390_GOTOFF32];
216 case BFD_RELOC_390_GOTPC:
217 return &elf_howto_table[(int) R_390_GOTPC];
218 case BFD_RELOC_390_GOT16:
219 return &elf_howto_table[(int) R_390_GOT16];
220 case BFD_RELOC_16_PCREL:
221 return &elf_howto_table[(int) R_390_PC16];
222 case BFD_RELOC_390_PC12DBL:
223 return &elf_howto_table[(int) R_390_PC12DBL];
224 case BFD_RELOC_390_PLT12DBL:
225 return &elf_howto_table[(int) R_390_PLT12DBL];
226 case BFD_RELOC_390_PC16DBL:
227 return &elf_howto_table[(int) R_390_PC16DBL];
228 case BFD_RELOC_390_PLT16DBL:
229 return &elf_howto_table[(int) R_390_PLT16DBL];
230 case BFD_RELOC_390_PC24DBL:
231 return &elf_howto_table[(int) R_390_PC24DBL];
232 case BFD_RELOC_390_PLT24DBL:
233 return &elf_howto_table[(int) R_390_PLT24DBL];
234 case BFD_RELOC_390_PC32DBL:
235 return &elf_howto_table[(int) R_390_PC32DBL];
236 case BFD_RELOC_390_PLT32DBL:
237 return &elf_howto_table[(int) R_390_PLT32DBL];
238 case BFD_RELOC_390_GOTPCDBL:
239 return &elf_howto_table[(int) R_390_GOTPCDBL];
240 case BFD_RELOC_390_GOTENT:
241 return &elf_howto_table[(int) R_390_GOTENT];
242 case BFD_RELOC_16_GOTOFF:
243 return &elf_howto_table[(int) R_390_GOTOFF16];
244 case BFD_RELOC_390_GOTPLT12:
245 return &elf_howto_table[(int) R_390_GOTPLT12];
246 case BFD_RELOC_390_GOTPLT16:
247 return &elf_howto_table[(int) R_390_GOTPLT16];
248 case BFD_RELOC_390_GOTPLT32:
249 return &elf_howto_table[(int) R_390_GOTPLT32];
250 case BFD_RELOC_390_GOTPLTENT:
251 return &elf_howto_table[(int) R_390_GOTPLTENT];
252 case BFD_RELOC_390_PLTOFF16:
253 return &elf_howto_table[(int) R_390_PLTOFF16];
254 case BFD_RELOC_390_PLTOFF32:
255 return &elf_howto_table[(int) R_390_PLTOFF32];
256 case BFD_RELOC_390_TLS_LOAD:
257 return &elf_howto_table[(int) R_390_TLS_LOAD];
258 case BFD_RELOC_390_TLS_GDCALL:
259 return &elf_howto_table[(int) R_390_TLS_GDCALL];
260 case BFD_RELOC_390_TLS_LDCALL:
261 return &elf_howto_table[(int) R_390_TLS_LDCALL];
262 case BFD_RELOC_390_TLS_GD32:
263 return &elf_howto_table[(int) R_390_TLS_GD32];
264 case BFD_RELOC_390_TLS_GOTIE12:
265 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266 case BFD_RELOC_390_TLS_GOTIE32:
267 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268 case BFD_RELOC_390_TLS_LDM32:
269 return &elf_howto_table[(int) R_390_TLS_LDM32];
270 case BFD_RELOC_390_TLS_IE32:
271 return &elf_howto_table[(int) R_390_TLS_IE32];
272 case BFD_RELOC_390_TLS_IEENT:
273 return &elf_howto_table[(int) R_390_TLS_IEENT];
274 case BFD_RELOC_390_TLS_LE32:
275 return &elf_howto_table[(int) R_390_TLS_LE32];
276 case BFD_RELOC_390_TLS_LDO32:
277 return &elf_howto_table[(int) R_390_TLS_LDO32];
278 case BFD_RELOC_390_TLS_DTPMOD:
279 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280 case BFD_RELOC_390_TLS_DTPOFF:
281 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282 case BFD_RELOC_390_TLS_TPOFF:
283 return &elf_howto_table[(int) R_390_TLS_TPOFF];
284 case BFD_RELOC_390_20:
285 return &elf_howto_table[(int) R_390_20];
286 case BFD_RELOC_390_GOT20:
287 return &elf_howto_table[(int) R_390_GOT20];
288 case BFD_RELOC_390_GOTPLT20:
289 return &elf_howto_table[(int) R_390_GOTPLT20];
290 case BFD_RELOC_390_TLS_GOTIE20:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292 case BFD_RELOC_390_IRELATIVE:
293 return &elf_howto_table[(int) R_390_IRELATIVE];
294 case BFD_RELOC_VTABLE_INHERIT:
295 return &elf32_s390_vtinherit_howto;
296 case BFD_RELOC_VTABLE_ENTRY:
297 return &elf32_s390_vtentry_howto;
298 default:
299 break;
300 }
301 return 0;
302 }
303
304 static reloc_howto_type *
305 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
306 const char *r_name)
307 {
308 unsigned int i;
309
310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311 if (elf_howto_table[i].name != NULL
312 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313 return &elf_howto_table[i];
314
315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316 return &elf32_s390_vtinherit_howto;
317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318 return &elf32_s390_vtentry_howto;
319
320 return NULL;
321 }
322
323 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
324 and elf32-s390.c has its own copy. */
325
326 static bfd_boolean
327 elf_s390_info_to_howto (bfd *abfd,
328 arelent *cache_ptr,
329 Elf_Internal_Rela *dst)
330 {
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
332
333 switch (r_type)
334 {
335 case R_390_GNU_VTINHERIT:
336 cache_ptr->howto = &elf32_s390_vtinherit_howto;
337 break;
338
339 case R_390_GNU_VTENTRY:
340 cache_ptr->howto = &elf32_s390_vtentry_howto;
341 break;
342
343 default:
344 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
345 {
346 /* xgettext:c-format */
347 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
348 abfd, r_type);
349 bfd_set_error (bfd_error_bad_value);
350 return FALSE;
351 }
352 cache_ptr->howto = &elf_howto_table[r_type];
353 }
354
355 return TRUE;
356 }
357
358 /* A relocation function which doesn't do anything. */
359 static bfd_reloc_status_type
360 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
361 arelent *reloc_entry,
362 asymbol *symbol ATTRIBUTE_UNUSED,
363 void * data ATTRIBUTE_UNUSED,
364 asection *input_section,
365 bfd *output_bfd,
366 char **error_message ATTRIBUTE_UNUSED)
367 {
368 if (output_bfd)
369 reloc_entry->address += input_section->output_offset;
370 return bfd_reloc_ok;
371 }
372
373 /* Handle the large displacement relocs. */
374 static bfd_reloc_status_type
375 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
376 arelent *reloc_entry,
377 asymbol *symbol,
378 void * data ATTRIBUTE_UNUSED,
379 asection *input_section,
380 bfd *output_bfd,
381 char **error_message ATTRIBUTE_UNUSED)
382 {
383 reloc_howto_type *howto = reloc_entry->howto;
384 bfd_vma relocation;
385 bfd_vma insn;
386
387 if (output_bfd != (bfd *) NULL
388 && (symbol->flags & BSF_SECTION_SYM) == 0
389 && (! howto->partial_inplace
390 || reloc_entry->addend == 0))
391 {
392 reloc_entry->address += input_section->output_offset;
393 return bfd_reloc_ok;
394 }
395
396 if (output_bfd != NULL)
397 return bfd_reloc_continue;
398
399 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
400 return bfd_reloc_outofrange;
401
402 relocation = (symbol->value
403 + symbol->section->output_section->vma
404 + symbol->section->output_offset);
405 relocation += reloc_entry->addend;
406 if (howto->pc_relative)
407 {
408 relocation -= (input_section->output_section->vma
409 + input_section->output_offset);
410 relocation -= reloc_entry->address;
411 }
412
413 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
414 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
415 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
416
417 if ((bfd_signed_vma) relocation < - 0x80000
418 || (bfd_signed_vma) relocation > 0x7ffff)
419 return bfd_reloc_overflow;
420 else
421 return bfd_reloc_ok;
422 }
423
424 static bfd_boolean
425 elf_s390_is_local_label_name (bfd *abfd, const char *name)
426 {
427 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
428 return TRUE;
429
430 return _bfd_elf_is_local_label_name (abfd, name);
431 }
432
433 /* Functions for the 390 ELF linker. */
434
435 /* The name of the dynamic interpreter. This is put in the .interp
436 section. */
437
438 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
439
440 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
441 copying dynamic variables from a shared lib into an app's dynbss
442 section, and instead use a dynamic relocation to point into the
443 shared lib. */
444 #define ELIMINATE_COPY_RELOCS 1
445
446 /* The size in bytes of the first entry in the procedure linkage table. */
447 #define PLT_FIRST_ENTRY_SIZE 32
448 /* The size in bytes of an entry in the procedure linkage table. */
449 #define PLT_ENTRY_SIZE 32
450
451 #define GOT_ENTRY_SIZE 4
452
453 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
454
455 /* The first three entries in a procedure linkage table are reserved,
456 and the initial contents are unimportant (we zero them out).
457 Subsequent entries look like this. See the SVR4 ABI 386
458 supplement to see how this works. */
459
460 /* For the s390, simple addr offset can only be 0 - 4096.
461 To use the full 2 GB address space, several instructions
462 are needed to load an address in a register and execute
463 a branch( or just saving the address)
464
465 Furthermore, only r 0 and 1 are free to use!!! */
466
467 /* The first 3 words in the GOT are then reserved.
468 Word 0 is the address of the dynamic table.
469 Word 1 is a pointer to a structure describing the object
470 Word 2 is used to point to the loader entry address.
471
472 The code for position independent PLT entries looks like this:
473
474 r12 holds addr of the current GOT at entry to the PLT
475
476 The GOT holds the address in the PLT to be executed.
477 The loader then gets:
478 24(15) = Pointer to the structure describing the object.
479 28(15) = Offset into rela.plt
480
481 The loader must then find the module where the function is
482 and insert the address in the GOT.
483
484 Note: 390 can only address +- 64 K relative.
485 We check if offset > 65536, then make a relative branch -64xxx
486 back to a previous defined branch
487
488 PLT1: BASR 1,0 # 2 bytes
489 L 1,22(1) # 4 bytes Load offset in GOT in r 1
490 L 1,(1,12) # 4 bytes Load address from GOT in r1
491 BCR 15,1 # 2 bytes Jump to address
492 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
493 L 1,14(1) # 4 bytes Load offset in symol table in r1
494 BRC 15,-x # 4 bytes Jump to start of PLT
495 .word 0 # 2 bytes filler
496 .long ? # 4 bytes offset in GOT
497 .long ? # 4 bytes offset into rela.plt
498
499 This was the general case. There are two additional, optimizes PLT
500 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
501 First the one for GOT offsets < 4096:
502
503 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
504 BCR 15,1 # 2 bytes Jump to address
505 .word 0,0,0 # 6 bytes filler
506 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
507 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
508 BRC 15,-x # 4 bytes Jump to start of PLT
509 .word 0,0,0 # 6 bytes filler
510 .long ? # 4 bytes offset into rela.plt
511
512 Second the one for GOT offsets < 32768:
513
514 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
515 L 1,(1,12) # 4 bytes Load address from GOT to r1
516 BCR 15,1 # 2 bytes Jump to address
517 .word 0 # 2 bytes filler
518 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
519 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
520 BRC 15,-x # 4 bytes Jump to start of PLT
521 .word 0,0,0 # 6 bytes filler
522 .long ? # 4 bytes offset into rela.plt
523
524 Total = 32 bytes per PLT entry
525
526 The code for static build PLT entries looks like this:
527
528 PLT1: BASR 1,0 # 2 bytes
529 L 1,22(1) # 4 bytes Load address of GOT entry
530 L 1,0(0,1) # 4 bytes Load address from GOT in r1
531 BCR 15,1 # 2 bytes Jump to address
532 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
533 L 1,14(1) # 4 bytes Load offset in symbol table in r1
534 BRC 15,-x # 4 bytes Jump to start of PLT
535 .word 0 # 2 bytes filler
536 .long ? # 4 bytes address of GOT entry
537 .long ? # 4 bytes offset into rela.plt */
538
539 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
540 {
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
543 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
544 0x07, 0xf1, /* br %r1 */
545 0x0d, 0x10, /* basr %r1,%r0 */
546 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
547 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
548 0x00, 0x00, /* padding */
549 0x00, 0x00, 0x00, 0x00, /* GOT offset */
550 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
551 };
552
553 /* Generic PLT pic entry. */
554 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
555 {
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
558 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
559 0x07, 0xf1, /* br %r1 */
560 0x0d, 0x10, /* basr %r1,%r0 */
561 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
562 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
563 0x00, 0x00, /* padding */
564 0x00, 0x00, 0x00, 0x00, /* GOT offset */
565 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
566 };
567
568 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
569 when generating the PLT slot with the GOT offset. */
570 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
571 {
572 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
573 0x07, 0xf1, /* br %r1 */
574 0x00, 0x00, 0x00, 0x00, /* padding */
575 0x00, 0x00,
576 0x0d, 0x10, /* basr %r1,%r0 */
577 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
578 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
579 0x00, 0x00, 0x00, 0x00,
580 0x00, 0x00, 0x00, 0x00
581 };
582
583 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
584 when generating the PLT slot with the GOT offset. */
585 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
586 {
587 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
588 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
589 0x07, 0xf1, /* br %r1 */
590 0x00, 0x00,
591 0x0d, 0x10, /* basr %r1,%r0 */
592 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
593 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
594 0x00, 0x00, 0x00, 0x00,
595 0x00, 0x00, 0x00, 0x00,
596 0x00, 0x00
597 };
598
599 /* The first PLT entry pushes the offset into the rela.plt
600 from R1 onto the stack at 8(15) and the loader object info
601 at 12(15), loads the loader address in R1 and jumps to it. */
602
603 /* The first entry in the PLT for PIC code:
604
605 PLT0:
606 ST 1,28(15) # R1 has offset into rela.plt
607 L 1,4(12) # Get loader ino(object struct address)
608 ST 1,24(15) # Store address
609 L 1,8(12) # Entry address of loader in R1
610 BR 1 # Jump to loader
611
612 The first entry in the PLT for static code:
613
614 PLT0:
615 ST 1,28(15) # R1 has offset into rela.plt
616 BASR 1,0
617 L 1,18(0,1) # Get address of GOT
618 MVC 24(4,15),4(1) # Move loader ino to stack
619 L 1,8(1) # Get address of loader
620 BR 1 # Jump to loader
621 .word 0 # filler
622 .long got # address of GOT */
623
624 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
625 {
626 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
627 0x0d, 0x10, /* basr %r1,%r0 */
628 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
629 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
630 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
631 0x07, 0xf1, /* br %r1 */
632 0x00, 0x00, 0x00, 0x00,
633 0x00, 0x00, 0x00, 0x00,
634 0x00, 0x00
635 };
636
637 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
638 {
639 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
640 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
641 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
642 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
643 0x07, 0xf1, /* br %r1 */
644 0x00, 0x00, 0x00, 0x00,
645 0x00, 0x00, 0x00, 0x00,
646 0x00, 0x00, 0x00, 0x00,
647 0x00, 0x00
648 };
649
650
651 /* s390 ELF linker hash entry. */
652
653 struct elf_s390_link_hash_entry
654 {
655 struct elf_link_hash_entry elf;
656
657 /* Track dynamic relocs copied for this symbol. */
658 struct elf_dyn_relocs *dyn_relocs;
659
660 /* Number of GOTPLT references for a function. */
661 bfd_signed_vma gotplt_refcount;
662
663 #define GOT_UNKNOWN 0
664 #define GOT_NORMAL 1
665 #define GOT_TLS_GD 2
666 #define GOT_TLS_IE 3
667 #define GOT_TLS_IE_NLT 4
668 unsigned char tls_type;
669
670 /* For pointer equality reasons we might need to change the symbol
671 type from STT_GNU_IFUNC to STT_FUNC together with its value and
672 section entry. So after alloc_dynrelocs only these values should
673 be used. In order to check whether a symbol is IFUNC use
674 s390_is_ifunc_symbol_p. */
675 bfd_vma ifunc_resolver_address;
676 asection *ifunc_resolver_section;
677 };
678
679 #define elf_s390_hash_entry(ent) \
680 ((struct elf_s390_link_hash_entry *)(ent))
681
682 /* This structure represents an entry in the local PLT list needed for
683 local IFUNC symbols. */
684 struct plt_entry
685 {
686 /* The section of the local symbol.
687 Set in relocate_section and used in finish_dynamic_sections. */
688 asection *sec;
689
690 union
691 {
692 bfd_signed_vma refcount;
693 bfd_vma offset;
694 } plt;
695 };
696
697 /* NOTE: Keep this structure in sync with
698 the one declared in elf64-s390.c. */
699 struct elf_s390_obj_tdata
700 {
701 struct elf_obj_tdata root;
702
703 /* A local PLT is needed for ifunc symbols. */
704 struct plt_entry *local_plt;
705
706 /* TLS type for each local got entry. */
707 char *local_got_tls_type;
708 };
709
710 #define elf_s390_tdata(abfd) \
711 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
712
713 #define elf_s390_local_plt(abfd) \
714 (elf_s390_tdata (abfd)->local_plt)
715
716 #define elf_s390_local_got_tls_type(abfd) \
717 (elf_s390_tdata (abfd)->local_got_tls_type)
718
719 #define is_s390_elf(bfd) \
720 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
721 && elf_tdata (bfd) != NULL \
722 && elf_object_id (bfd) == S390_ELF_DATA)
723
724 static bfd_boolean
725 elf_s390_mkobject (bfd *abfd)
726 {
727 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
728 S390_ELF_DATA);
729 }
730
731 static bfd_boolean
732 elf_s390_object_p (bfd *abfd)
733 {
734 /* Set the right machine number for an s390 elf32 file. */
735 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
736 }
737
738 /* s390 ELF linker hash table. */
739
740 struct elf_s390_link_hash_table
741 {
742 struct elf_link_hash_table elf;
743
744 /* Short-cuts to get to dynamic linker sections. */
745 asection *irelifunc;
746
747 union
748 {
749 bfd_signed_vma refcount;
750 bfd_vma offset;
751 } tls_ldm_got;
752
753 /* Small local sym cache. */
754 struct sym_cache sym_cache;
755 };
756
757 /* Get the s390 ELF linker hash table from a link_info structure. */
758
759 #define elf_s390_hash_table(p) \
760 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
761 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
762
763 #undef ELF64
764 #include "elf-s390-common.c"
765
766 /* Create an entry in an s390 ELF linker hash table. */
767
768 static struct bfd_hash_entry *
769 link_hash_newfunc (struct bfd_hash_entry *entry,
770 struct bfd_hash_table *table,
771 const char *string)
772 {
773 /* Allocate the structure if it has not already been allocated by a
774 subclass. */
775 if (entry == NULL)
776 {
777 entry = bfd_hash_allocate (table,
778 sizeof (struct elf_s390_link_hash_entry));
779 if (entry == NULL)
780 return entry;
781 }
782
783 /* Call the allocation method of the superclass. */
784 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
785 if (entry != NULL)
786 {
787 struct elf_s390_link_hash_entry *eh;
788
789 eh = (struct elf_s390_link_hash_entry *) entry;
790 eh->dyn_relocs = NULL;
791 eh->gotplt_refcount = 0;
792 eh->tls_type = GOT_UNKNOWN;
793 eh->ifunc_resolver_address = 0;
794 eh->ifunc_resolver_section = NULL;
795 }
796
797 return entry;
798 }
799
800 /* Create an s390 ELF linker hash table. */
801
802 static struct bfd_link_hash_table *
803 elf_s390_link_hash_table_create (bfd *abfd)
804 {
805 struct elf_s390_link_hash_table *ret;
806 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
807
808 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
809 if (ret == NULL)
810 return NULL;
811
812 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
813 sizeof (struct elf_s390_link_hash_entry),
814 S390_ELF_DATA))
815 {
816 free (ret);
817 return NULL;
818 }
819
820 return &ret->elf.root;
821 }
822
823 /* Copy the extra info we tack onto an elf_link_hash_entry. */
824
825 static void
826 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
827 struct elf_link_hash_entry *dir,
828 struct elf_link_hash_entry *ind)
829 {
830 struct elf_s390_link_hash_entry *edir, *eind;
831
832 edir = (struct elf_s390_link_hash_entry *) dir;
833 eind = (struct elf_s390_link_hash_entry *) ind;
834
835 if (eind->dyn_relocs != NULL)
836 {
837 if (edir->dyn_relocs != NULL)
838 {
839 struct elf_dyn_relocs **pp;
840 struct elf_dyn_relocs *p;
841
842 /* Add reloc counts against the indirect sym to the direct sym
843 list. Merge any entries against the same section. */
844 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
845 {
846 struct elf_dyn_relocs *q;
847
848 for (q = edir->dyn_relocs; q != NULL; q = q->next)
849 if (q->sec == p->sec)
850 {
851 q->pc_count += p->pc_count;
852 q->count += p->count;
853 *pp = p->next;
854 break;
855 }
856 if (q == NULL)
857 pp = &p->next;
858 }
859 *pp = edir->dyn_relocs;
860 }
861
862 edir->dyn_relocs = eind->dyn_relocs;
863 eind->dyn_relocs = NULL;
864 }
865
866 if (ind->root.type == bfd_link_hash_indirect
867 && dir->got.refcount <= 0)
868 {
869 edir->tls_type = eind->tls_type;
870 eind->tls_type = GOT_UNKNOWN;
871 }
872
873 if (ELIMINATE_COPY_RELOCS
874 && ind->root.type != bfd_link_hash_indirect
875 && dir->dynamic_adjusted)
876 {
877 /* If called to transfer flags for a weakdef during processing
878 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
879 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
880 if (dir->versioned != versioned_hidden)
881 dir->ref_dynamic |= ind->ref_dynamic;
882 dir->ref_regular |= ind->ref_regular;
883 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
884 dir->needs_plt |= ind->needs_plt;
885 }
886 else
887 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
888 }
889
890 static int
891 elf_s390_tls_transition (struct bfd_link_info *info,
892 int r_type,
893 int is_local)
894 {
895 if (bfd_link_pic (info))
896 return r_type;
897
898 switch (r_type)
899 {
900 case R_390_TLS_GD32:
901 case R_390_TLS_IE32:
902 if (is_local)
903 return R_390_TLS_LE32;
904 return R_390_TLS_IE32;
905 case R_390_TLS_GOTIE32:
906 if (is_local)
907 return R_390_TLS_LE32;
908 return R_390_TLS_GOTIE32;
909 case R_390_TLS_LDM32:
910 return R_390_TLS_LE32;
911 }
912
913 return r_type;
914 }
915
916 /* Look through the relocs for a section during the first phase, and
917 allocate space in the global offset table or procedure linkage
918 table. */
919
920 static bfd_boolean
921 elf_s390_check_relocs (bfd *abfd,
922 struct bfd_link_info *info,
923 asection *sec,
924 const Elf_Internal_Rela *relocs)
925 {
926 struct elf_s390_link_hash_table *htab;
927 Elf_Internal_Shdr *symtab_hdr;
928 struct elf_link_hash_entry **sym_hashes;
929 const Elf_Internal_Rela *rel;
930 const Elf_Internal_Rela *rel_end;
931 asection *sreloc;
932 bfd_signed_vma *local_got_refcounts;
933 int tls_type, old_tls_type;
934 Elf_Internal_Sym *isym;
935
936 if (bfd_link_relocatable (info))
937 return TRUE;
938
939 BFD_ASSERT (is_s390_elf (abfd));
940
941 htab = elf_s390_hash_table (info);
942 symtab_hdr = &elf_symtab_hdr (abfd);
943 sym_hashes = elf_sym_hashes (abfd);
944 local_got_refcounts = elf_local_got_refcounts (abfd);
945
946 sreloc = NULL;
947
948 rel_end = relocs + sec->reloc_count;
949 for (rel = relocs; rel < rel_end; rel++)
950 {
951 unsigned int r_type;
952 unsigned int r_symndx;
953 struct elf_link_hash_entry *h;
954
955 r_symndx = ELF32_R_SYM (rel->r_info);
956
957 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
958 {
959 /* xgettext:c-format */
960 _bfd_error_handler (_("%pB: bad symbol index: %d"),
961 abfd, r_symndx);
962 return FALSE;
963 }
964
965 if (r_symndx < symtab_hdr->sh_info)
966 {
967 /* A local symbol. */
968 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
969 abfd, r_symndx);
970 if (isym == NULL)
971 return FALSE;
972
973 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
974 {
975 struct plt_entry *plt;
976
977 if (htab->elf.dynobj == NULL)
978 htab->elf.dynobj = abfd;
979
980 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
981 return FALSE;
982
983 if (local_got_refcounts == NULL)
984 {
985 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
986 return FALSE;
987 local_got_refcounts = elf_local_got_refcounts (abfd);
988 }
989 plt = elf_s390_local_plt (abfd);
990 plt[r_symndx].plt.refcount++;
991 }
992 h = NULL;
993 }
994 else
995 {
996 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
997 while (h->root.type == bfd_link_hash_indirect
998 || h->root.type == bfd_link_hash_warning)
999 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1000 }
1001
1002 /* Create got section and local_got_refcounts array if they
1003 are needed. */
1004 r_type = elf_s390_tls_transition (info,
1005 ELF32_R_TYPE (rel->r_info),
1006 h == NULL);
1007 switch (r_type)
1008 {
1009 case R_390_GOT12:
1010 case R_390_GOT16:
1011 case R_390_GOT20:
1012 case R_390_GOT32:
1013 case R_390_GOTENT:
1014 case R_390_GOTPLT12:
1015 case R_390_GOTPLT16:
1016 case R_390_GOTPLT20:
1017 case R_390_GOTPLT32:
1018 case R_390_GOTPLTENT:
1019 case R_390_TLS_GD32:
1020 case R_390_TLS_GOTIE12:
1021 case R_390_TLS_GOTIE20:
1022 case R_390_TLS_GOTIE32:
1023 case R_390_TLS_IEENT:
1024 case R_390_TLS_IE32:
1025 case R_390_TLS_LDM32:
1026 if (h == NULL
1027 && local_got_refcounts == NULL)
1028 {
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1030 return FALSE;
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1032 }
1033 /* Fall through. */
1034 case R_390_GOTOFF16:
1035 case R_390_GOTOFF32:
1036 case R_390_GOTPC:
1037 case R_390_GOTPCDBL:
1038 if (htab->elf.sgot == NULL)
1039 {
1040 if (htab->elf.dynobj == NULL)
1041 htab->elf.dynobj = abfd;
1042 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1043 return FALSE;
1044 }
1045 }
1046
1047 if (h != NULL)
1048 {
1049 if (htab->elf.dynobj == NULL)
1050 htab->elf.dynobj = abfd;
1051 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1052 return FALSE;
1053
1054 /* Make sure an IFUNC symbol defined in a non-shared object
1055 always gets a PLT slot. */
1056 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1057 {
1058 /* The symbol is called by the dynamic loader in order
1059 to resolve the relocation. So it is in fact also
1060 referenced. */
1061 h->ref_regular = 1;
1062 h->needs_plt = 1;
1063 }
1064 }
1065 switch (r_type)
1066 {
1067 case R_390_GOTPC:
1068 case R_390_GOTPCDBL:
1069 /* These relocs do not need a GOT slot. They just load the
1070 GOT pointer itself or address something else relative to
1071 the GOT. Since the GOT pointer has been set up above we
1072 are done. */
1073 break;
1074 case R_390_GOTOFF16:
1075 case R_390_GOTOFF32:
1076 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1077 break;
1078 /* Fall through. */
1079
1080 case R_390_PLT12DBL:
1081 case R_390_PLT16DBL:
1082 case R_390_PLT24DBL:
1083 case R_390_PLT32DBL:
1084 case R_390_PLT32:
1085 case R_390_PLTOFF16:
1086 case R_390_PLTOFF32:
1087 /* This symbol requires a procedure linkage table entry. We
1088 actually build the entry in adjust_dynamic_symbol,
1089 because this might be a case of linking PIC code which is
1090 never referenced by a dynamic object, in which case we
1091 don't need to generate a procedure linkage table entry
1092 after all. */
1093
1094 /* If this is a local symbol, we resolve it directly without
1095 creating a procedure linkage table entry. */
1096 if (h != NULL)
1097 {
1098 h->needs_plt = 1;
1099 h->plt.refcount += 1;
1100 }
1101 break;
1102
1103 case R_390_GOTPLT12:
1104 case R_390_GOTPLT16:
1105 case R_390_GOTPLT20:
1106 case R_390_GOTPLT32:
1107 case R_390_GOTPLTENT:
1108 /* This symbol requires either a procedure linkage table entry
1109 or an entry in the local got. We actually build the entry
1110 in adjust_dynamic_symbol because whether this is really a
1111 global reference can change and with it the fact if we have
1112 to create a plt entry or a local got entry. To be able to
1113 make a once global symbol a local one we have to keep track
1114 of the number of gotplt references that exist for this
1115 symbol. */
1116 if (h != NULL)
1117 {
1118 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1119 h->needs_plt = 1;
1120 h->plt.refcount += 1;
1121 }
1122 else
1123 local_got_refcounts[r_symndx] += 1;
1124 break;
1125
1126 case R_390_TLS_LDM32:
1127 htab->tls_ldm_got.refcount += 1;
1128 break;
1129
1130 case R_390_TLS_IE32:
1131 case R_390_TLS_GOTIE12:
1132 case R_390_TLS_GOTIE20:
1133 case R_390_TLS_GOTIE32:
1134 case R_390_TLS_IEENT:
1135 if (bfd_link_pic (info))
1136 info->flags |= DF_STATIC_TLS;
1137 /* Fall through. */
1138
1139 case R_390_GOT12:
1140 case R_390_GOT16:
1141 case R_390_GOT20:
1142 case R_390_GOT32:
1143 case R_390_GOTENT:
1144 case R_390_TLS_GD32:
1145 /* This symbol requires a global offset table entry. */
1146 switch (r_type)
1147 {
1148 default:
1149 case R_390_GOT12:
1150 case R_390_GOT16:
1151 case R_390_GOT20:
1152 case R_390_GOT32:
1153 case R_390_GOTENT:
1154 tls_type = GOT_NORMAL;
1155 break;
1156 case R_390_TLS_GD32:
1157 tls_type = GOT_TLS_GD;
1158 break;
1159 case R_390_TLS_IE32:
1160 case R_390_TLS_GOTIE32:
1161 tls_type = GOT_TLS_IE;
1162 break;
1163 case R_390_TLS_GOTIE12:
1164 case R_390_TLS_GOTIE20:
1165 case R_390_TLS_IEENT:
1166 tls_type = GOT_TLS_IE_NLT;
1167 break;
1168 }
1169
1170 if (h != NULL)
1171 {
1172 h->got.refcount += 1;
1173 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1174 }
1175 else
1176 {
1177 local_got_refcounts[r_symndx] += 1;
1178 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1179 }
1180 /* If a TLS symbol is accessed using IE at least once,
1181 there is no point to use dynamic model for it. */
1182 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1183 {
1184 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1185 {
1186 _bfd_error_handler
1187 /* xgettext:c-format */
1188 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1189 abfd, h->root.root.string);
1190 return FALSE;
1191 }
1192 if (old_tls_type > tls_type)
1193 tls_type = old_tls_type;
1194 }
1195
1196 if (old_tls_type != tls_type)
1197 {
1198 if (h != NULL)
1199 elf_s390_hash_entry (h)->tls_type = tls_type;
1200 else
1201 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1202 }
1203
1204 if (r_type != R_390_TLS_IE32)
1205 break;
1206 /* Fall through. */
1207
1208 case R_390_TLS_LE32:
1209 /* For static linking and executables this reloc will be
1210 calculated at linktime otherwise a TLS_TPOFF runtime
1211 reloc will be generated. */
1212 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1213 break;
1214
1215 if (!bfd_link_pic (info))
1216 break;
1217 info->flags |= DF_STATIC_TLS;
1218 /* Fall through. */
1219
1220 case R_390_8:
1221 case R_390_16:
1222 case R_390_32:
1223 case R_390_PC16:
1224 case R_390_PC12DBL:
1225 case R_390_PC16DBL:
1226 case R_390_PC24DBL:
1227 case R_390_PC32DBL:
1228 case R_390_PC32:
1229 if (h != NULL && bfd_link_executable (info))
1230 {
1231 /* If this reloc is in a read-only section, we might
1232 need a copy reloc. We can't check reliably at this
1233 stage whether the section is read-only, as input
1234 sections have not yet been mapped to output sections.
1235 Tentatively set the flag for now, and correct in
1236 adjust_dynamic_symbol. */
1237 h->non_got_ref = 1;
1238
1239 if (!bfd_link_pic (info))
1240 {
1241 /* We may need a .plt entry if the function this reloc
1242 refers to is in a shared lib. */
1243 h->plt.refcount += 1;
1244 }
1245 }
1246
1247 /* If we are creating a shared library, and this is a reloc
1248 against a global symbol, or a non PC relative reloc
1249 against a local symbol, then we need to copy the reloc
1250 into the shared library. However, if we are linking with
1251 -Bsymbolic, we do not need to copy a reloc against a
1252 global symbol which is defined in an object we are
1253 including in the link (i.e., DEF_REGULAR is set). At
1254 this point we have not seen all the input files, so it is
1255 possible that DEF_REGULAR is not set now but will be set
1256 later (it is never cleared). In case of a weak definition,
1257 DEF_REGULAR may be cleared later by a strong definition in
1258 a shared library. We account for that possibility below by
1259 storing information in the relocs_copied field of the hash
1260 table entry. A similar situation occurs when creating
1261 shared libraries and symbol visibility changes render the
1262 symbol local.
1263
1264 If on the other hand, we are creating an executable, we
1265 may need to keep relocations for symbols satisfied by a
1266 dynamic library if we manage to avoid copy relocs for the
1267 symbol. */
1268 if ((bfd_link_pic (info)
1269 && (sec->flags & SEC_ALLOC) != 0
1270 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1272 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1273 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1274 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1275 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1276 || (h != NULL
1277 && (! SYMBOLIC_BIND (info, h)
1278 || h->root.type == bfd_link_hash_defweak
1279 || !h->def_regular))))
1280 || (ELIMINATE_COPY_RELOCS
1281 && !bfd_link_pic (info)
1282 && (sec->flags & SEC_ALLOC) != 0
1283 && h != NULL
1284 && (h->root.type == bfd_link_hash_defweak
1285 || !h->def_regular)))
1286 {
1287 struct elf_dyn_relocs *p;
1288 struct elf_dyn_relocs **head;
1289
1290 /* We must copy these reloc types into the output file.
1291 Create a reloc section in dynobj and make room for
1292 this reloc. */
1293 if (sreloc == NULL)
1294 {
1295 if (htab->elf.dynobj == NULL)
1296 htab->elf.dynobj = abfd;
1297
1298 sreloc = _bfd_elf_make_dynamic_reloc_section
1299 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1300
1301 if (sreloc == NULL)
1302 return FALSE;
1303 }
1304
1305 /* If this is a global symbol, we count the number of
1306 relocations we need for this symbol. */
1307 if (h != NULL)
1308 {
1309 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1310 }
1311 else
1312 {
1313 /* Track dynamic relocs needed for local syms too.
1314 We really need local syms available to do this
1315 easily. Oh well. */
1316 asection *s;
1317 void *vpp;
1318
1319 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1320 abfd, r_symndx);
1321 if (isym == NULL)
1322 return FALSE;
1323
1324 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1325 if (s == NULL)
1326 s = sec;
1327
1328 vpp = &elf_section_data (s)->local_dynrel;
1329 head = (struct elf_dyn_relocs **) vpp;
1330 }
1331
1332 p = *head;
1333 if (p == NULL || p->sec != sec)
1334 {
1335 bfd_size_type amt = sizeof *p;
1336
1337 p = ((struct elf_dyn_relocs *)
1338 bfd_alloc (htab->elf.dynobj, amt));
1339 if (p == NULL)
1340 return FALSE;
1341 p->next = *head;
1342 *head = p;
1343 p->sec = sec;
1344 p->count = 0;
1345 p->pc_count = 0;
1346 }
1347
1348 p->count += 1;
1349 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1353 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1354 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1355 p->pc_count += 1;
1356 }
1357 break;
1358
1359 /* This relocation describes the C++ object vtable hierarchy.
1360 Reconstruct it for later use during GC. */
1361 case R_390_GNU_VTINHERIT:
1362 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1363 return FALSE;
1364 break;
1365
1366 /* This relocation describes which C++ vtable entries are actually
1367 used. Record for later use during GC. */
1368 case R_390_GNU_VTENTRY:
1369 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1370 return FALSE;
1371 break;
1372
1373 default:
1374 break;
1375 }
1376 }
1377
1378 return TRUE;
1379 }
1380
1381 /* Return the section that should be marked against GC for a given
1382 relocation. */
1383
1384 static asection *
1385 elf_s390_gc_mark_hook (asection *sec,
1386 struct bfd_link_info *info,
1387 Elf_Internal_Rela *rel,
1388 struct elf_link_hash_entry *h,
1389 Elf_Internal_Sym *sym)
1390 {
1391 if (h != NULL)
1392 switch (ELF32_R_TYPE (rel->r_info))
1393 {
1394 case R_390_GNU_VTINHERIT:
1395 case R_390_GNU_VTENTRY:
1396 return NULL;
1397 }
1398 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1399
1400 }
1401
1402 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1403 entry but we found we will not create any. Called when we find we will
1404 not have any PLT for this symbol, by for example
1405 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1406 or elf_s390_size_dynamic_sections if no dynamic sections will be
1407 created (we're only linking static objects). */
1408
1409 static void
1410 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1411 {
1412 if (h->elf.root.type == bfd_link_hash_warning)
1413 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1414
1415 if (h->gotplt_refcount <= 0)
1416 return;
1417
1418 /* We simply add the number of gotplt references to the number
1419 * of got references for this symbol. */
1420 h->elf.got.refcount += h->gotplt_refcount;
1421 h->gotplt_refcount = -1;
1422 }
1423
1424 /* Find dynamic relocs for H that apply to read-only sections. */
1425
1426 static asection *
1427 readonly_dynrelocs (struct elf_link_hash_entry *h)
1428 {
1429 struct elf_dyn_relocs *p;
1430
1431 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1432 {
1433 asection *s = p->sec->output_section;
1434
1435 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1436 return p->sec;
1437 }
1438 return NULL;
1439 }
1440
1441 /* Adjust a symbol defined by a dynamic object and referenced by a
1442 regular object. The current definition is in some section of the
1443 dynamic object, but we're not including those sections. We have to
1444 change the definition to something the rest of the link can
1445 understand. */
1446
1447 static bfd_boolean
1448 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1449 struct elf_link_hash_entry *h)
1450 {
1451 struct elf_s390_link_hash_table *htab;
1452 asection *s, *srel;
1453
1454 /* STT_GNU_IFUNC symbol must go through PLT. */
1455 if (s390_is_ifunc_symbol_p (h))
1456 {
1457 /* All local STT_GNU_IFUNC references must be treated as local
1458 calls via local PLT. */
1459 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1460 {
1461 bfd_size_type pc_count = 0, count = 0;
1462 struct elf_dyn_relocs **pp;
1463 struct elf_s390_link_hash_entry *eh;
1464 struct elf_dyn_relocs *p;
1465
1466 eh = (struct elf_s390_link_hash_entry *) h;
1467 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1468 {
1469 pc_count += p->pc_count;
1470 p->count -= p->pc_count;
1471 p->pc_count = 0;
1472 count += p->count;
1473 if (p->count == 0)
1474 *pp = p->next;
1475 else
1476 pp = &p->next;
1477 }
1478
1479 if (pc_count || count)
1480 {
1481 h->needs_plt = 1;
1482 h->non_got_ref = 1;
1483 if (h->plt.refcount <= 0)
1484 h->plt.refcount = 1;
1485 else
1486 h->plt.refcount += 1;
1487 }
1488 }
1489
1490 if (h->plt.refcount <= 0)
1491 {
1492 h->plt.offset = (bfd_vma) -1;
1493 h->needs_plt = 0;
1494 }
1495 return TRUE;
1496 }
1497
1498 /* If this is a function, put it in the procedure linkage table. We
1499 will fill in the contents of the procedure linkage table later
1500 (although we could actually do it here). */
1501 if (h->type == STT_FUNC
1502 || h->needs_plt)
1503 {
1504 if (h->plt.refcount <= 0
1505 || SYMBOL_CALLS_LOCAL (info, h)
1506 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1507 && h->root.type != bfd_link_hash_undefweak))
1508 {
1509 /* This case can occur if we saw a PLT32 reloc in an input
1510 file, but the symbol was never referred to by a dynamic
1511 object, or if all references were garbage collected. In
1512 such a case, we don't actually need to build a procedure
1513 linkage table, and we can just do a PC32 reloc instead. */
1514 h->plt.offset = (bfd_vma) -1;
1515 h->needs_plt = 0;
1516 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1517 }
1518
1519 return TRUE;
1520 }
1521 else
1522 /* It's possible that we incorrectly decided a .plt reloc was
1523 needed for an R_390_PC32 reloc to a non-function sym in
1524 check_relocs. We can't decide accurately between function and
1525 non-function syms in check-relocs; Objects loaded later in
1526 the link may change h->type. So fix it now. */
1527 h->plt.offset = (bfd_vma) -1;
1528
1529 /* If this is a weak symbol, and there is a real definition, the
1530 processor independent code will have arranged for us to see the
1531 real definition first, and we can just use the same value. */
1532 if (h->is_weakalias)
1533 {
1534 struct elf_link_hash_entry *def = weakdef (h);
1535 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1536 h->root.u.def.section = def->root.u.def.section;
1537 h->root.u.def.value = def->root.u.def.value;
1538 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1539 h->non_got_ref = def->non_got_ref;
1540 return TRUE;
1541 }
1542
1543 /* This is a reference to a symbol defined by a dynamic object which
1544 is not a function. */
1545
1546 /* If we are creating a shared library, we must presume that the
1547 only references to the symbol are via the global offset table.
1548 For such cases we need not do anything here; the relocations will
1549 be handled correctly by relocate_section. */
1550 if (bfd_link_pic (info))
1551 return TRUE;
1552
1553 /* If there are no references to this symbol that do not use the
1554 GOT, we don't need to generate a copy reloc. */
1555 if (!h->non_got_ref)
1556 return TRUE;
1557
1558 /* If -z nocopyreloc was given, we won't generate them either. */
1559 if (info->nocopyreloc)
1560 {
1561 h->non_got_ref = 0;
1562 return TRUE;
1563 }
1564
1565 /* If we don't find any dynamic relocs in read-only sections, then
1566 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1567 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1568 {
1569 h->non_got_ref = 0;
1570 return TRUE;
1571 }
1572
1573 /* We must allocate the symbol in our .dynbss section, which will
1574 become part of the .bss section of the executable. There will be
1575 an entry for this symbol in the .dynsym section. The dynamic
1576 object will contain position independent code, so all references
1577 from the dynamic object to this symbol will go through the global
1578 offset table. The dynamic linker will use the .dynsym entry to
1579 determine the address it must put in the global offset table, so
1580 both the dynamic object and the regular object will refer to the
1581 same memory location for the variable. */
1582
1583 htab = elf_s390_hash_table (info);
1584
1585 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1586 copy the initial value out of the dynamic object and into the
1587 runtime process image. */
1588 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1589 {
1590 s = htab->elf.sdynrelro;
1591 srel = htab->elf.sreldynrelro;
1592 }
1593 else
1594 {
1595 s = htab->elf.sdynbss;
1596 srel = htab->elf.srelbss;
1597 }
1598 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1599 {
1600 srel->size += sizeof (Elf32_External_Rela);
1601 h->needs_copy = 1;
1602 }
1603
1604 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1605 }
1606
1607 /* Allocate space in .plt, .got and associated reloc sections for
1608 dynamic relocs. */
1609
1610 static bfd_boolean
1611 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1612 {
1613 struct bfd_link_info *info;
1614 struct elf_s390_link_hash_table *htab;
1615 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1616 struct elf_dyn_relocs *p;
1617
1618 if (h->root.type == bfd_link_hash_indirect)
1619 return TRUE;
1620
1621 info = (struct bfd_link_info *) inf;
1622 htab = elf_s390_hash_table (info);
1623
1624 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1625 here if it is defined and referenced in a non-shared object. */
1626 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1627 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1628 else if (htab->elf.dynamic_sections_created
1629 && h->plt.refcount > 0)
1630 {
1631 /* Make sure this symbol is output as a dynamic symbol.
1632 Undefined weak syms won't yet be marked as dynamic. */
1633 if (h->dynindx == -1
1634 && !h->forced_local)
1635 {
1636 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1637 return FALSE;
1638 }
1639
1640 if (bfd_link_pic (info)
1641 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1642 {
1643 asection *s = htab->elf.splt;
1644
1645 /* If this is the first .plt entry, make room for the special
1646 first entry. */
1647 if (s->size == 0)
1648 s->size += PLT_FIRST_ENTRY_SIZE;
1649
1650 h->plt.offset = s->size;
1651
1652 /* If this symbol is not defined in a regular file, and we are
1653 not generating a shared library, then set the symbol to this
1654 location in the .plt. This is required to make function
1655 pointers compare as equal between the normal executable and
1656 the shared library. */
1657 if (! bfd_link_pic (info)
1658 && !h->def_regular)
1659 {
1660 h->root.u.def.section = s;
1661 h->root.u.def.value = h->plt.offset;
1662 }
1663
1664 /* Make room for this entry. */
1665 s->size += PLT_ENTRY_SIZE;
1666
1667 /* We also need to make an entry in the .got.plt section, which
1668 will be placed in the .got section by the linker script. */
1669 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1670
1671 /* We also need to make an entry in the .rela.plt section. */
1672 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1673 }
1674 else
1675 {
1676 h->plt.offset = (bfd_vma) -1;
1677 h->needs_plt = 0;
1678 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1679 }
1680 }
1681 else
1682 {
1683 h->plt.offset = (bfd_vma) -1;
1684 h->needs_plt = 0;
1685 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1686 }
1687
1688 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1689 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1690 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1691 we can save the dynamic TLS relocation. */
1692 if (h->got.refcount > 0
1693 && !bfd_link_pic (info)
1694 && h->dynindx == -1
1695 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1696 {
1697 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1698 /* For the GOTIE access without a literal pool entry the offset has
1699 to be stored somewhere. The immediate value in the instruction
1700 is not bit enough so the value is stored in the got. */
1701 {
1702 h->got.offset = htab->elf.sgot->size;
1703 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1704 }
1705 else
1706 h->got.offset = (bfd_vma) -1;
1707 }
1708 else if (h->got.refcount > 0)
1709 {
1710 asection *s;
1711 bfd_boolean dyn;
1712 int tls_type = elf_s390_hash_entry(h)->tls_type;
1713
1714 /* Make sure this symbol is output as a dynamic symbol.
1715 Undefined weak syms won't yet be marked as dynamic. */
1716 if (h->dynindx == -1
1717 && !h->forced_local)
1718 {
1719 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1720 return FALSE;
1721 }
1722
1723 s = htab->elf.sgot;
1724 h->got.offset = s->size;
1725 s->size += GOT_ENTRY_SIZE;
1726 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1727 if (tls_type == GOT_TLS_GD)
1728 s->size += GOT_ENTRY_SIZE;
1729 dyn = htab->elf.dynamic_sections_created;
1730 /* R_390_TLS_IE32 needs one dynamic relocation,
1731 R_390_TLS_GD32 needs one if local symbol and two if global. */
1732 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1733 || tls_type >= GOT_TLS_IE)
1734 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1735 else if (tls_type == GOT_TLS_GD)
1736 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1737 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1738 || h->root.type != bfd_link_hash_undefweak)
1739 && (bfd_link_pic (info)
1740 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1741 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1742 }
1743 else
1744 h->got.offset = (bfd_vma) -1;
1745
1746 if (eh->dyn_relocs == NULL)
1747 return TRUE;
1748
1749 /* In the shared -Bsymbolic case, discard space allocated for
1750 dynamic pc-relative relocs against symbols which turn out to be
1751 defined in regular objects. For the normal shared case, discard
1752 space for pc-relative relocs that have become local due to symbol
1753 visibility changes. */
1754
1755 if (bfd_link_pic (info))
1756 {
1757 if (SYMBOL_CALLS_LOCAL (info, h))
1758 {
1759 struct elf_dyn_relocs **pp;
1760
1761 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1762 {
1763 p->count -= p->pc_count;
1764 p->pc_count = 0;
1765 if (p->count == 0)
1766 *pp = p->next;
1767 else
1768 pp = &p->next;
1769 }
1770 }
1771
1772 /* Also discard relocs on undefined weak syms with non-default
1773 visibility. */
1774 if (eh->dyn_relocs != NULL
1775 && h->root.type == bfd_link_hash_undefweak)
1776 {
1777 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1778 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1779 eh->dyn_relocs = NULL;
1780
1781 /* Make sure undefined weak symbols are output as a dynamic
1782 symbol in PIEs. */
1783 else if (h->dynindx == -1
1784 && !h->forced_local)
1785 {
1786 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1787 return FALSE;
1788 }
1789 }
1790 }
1791 else if (ELIMINATE_COPY_RELOCS)
1792 {
1793 /* For the non-shared case, discard space for relocs against
1794 symbols which turn out to need copy relocs or are not
1795 dynamic. */
1796
1797 if (!h->non_got_ref
1798 && ((h->def_dynamic
1799 && !h->def_regular)
1800 || (htab->elf.dynamic_sections_created
1801 && (h->root.type == bfd_link_hash_undefweak
1802 || h->root.type == bfd_link_hash_undefined))))
1803 {
1804 /* Make sure this symbol is output as a dynamic symbol.
1805 Undefined weak syms won't yet be marked as dynamic. */
1806 if (h->dynindx == -1
1807 && !h->forced_local)
1808 {
1809 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1810 return FALSE;
1811 }
1812
1813 /* If that succeeded, we know we'll be keeping all the
1814 relocs. */
1815 if (h->dynindx != -1)
1816 goto keep;
1817 }
1818
1819 eh->dyn_relocs = NULL;
1820
1821 keep: ;
1822 }
1823
1824 /* Finally, allocate space. */
1825 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1826 {
1827 asection *sreloc = elf_section_data (p->sec)->sreloc;
1828
1829 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1830 }
1831
1832 return TRUE;
1833 }
1834
1835 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1836 read-only sections. */
1837
1838 static bfd_boolean
1839 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1840 {
1841 asection *sec;
1842
1843 if (h->root.type == bfd_link_hash_indirect)
1844 return TRUE;
1845
1846 sec = readonly_dynrelocs (h);
1847 if (sec != NULL)
1848 {
1849 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1850
1851 info->flags |= DF_TEXTREL;
1852 info->callbacks->minfo
1853 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1854 sec->owner, h->root.root.string, sec);
1855
1856 /* Not an error, just cut short the traversal. */
1857 return FALSE;
1858 }
1859 return TRUE;
1860 }
1861
1862 /* Set the sizes of the dynamic sections. */
1863
1864 static bfd_boolean
1865 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1866 struct bfd_link_info *info)
1867 {
1868 struct elf_s390_link_hash_table *htab;
1869 bfd *dynobj;
1870 asection *s;
1871 bfd_boolean relocs;
1872 bfd *ibfd;
1873
1874 htab = elf_s390_hash_table (info);
1875 dynobj = htab->elf.dynobj;
1876 if (dynobj == NULL)
1877 abort ();
1878
1879 if (htab->elf.dynamic_sections_created)
1880 {
1881 /* Set the contents of the .interp section to the interpreter. */
1882 if (bfd_link_executable (info) && !info->nointerp)
1883 {
1884 s = bfd_get_linker_section (dynobj, ".interp");
1885 if (s == NULL)
1886 abort ();
1887 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1888 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1889 }
1890 }
1891
1892 /* Set up .got offsets for local syms, and space for local dynamic
1893 relocs. */
1894 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1895 {
1896 bfd_signed_vma *local_got;
1897 bfd_signed_vma *end_local_got;
1898 char *local_tls_type;
1899 bfd_size_type locsymcount;
1900 Elf_Internal_Shdr *symtab_hdr;
1901 asection *srela;
1902 struct plt_entry *local_plt;
1903 unsigned int i;
1904
1905 if (! is_s390_elf (ibfd))
1906 continue;
1907
1908 for (s = ibfd->sections; s != NULL; s = s->next)
1909 {
1910 struct elf_dyn_relocs *p;
1911
1912 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1913 {
1914 if (!bfd_is_abs_section (p->sec)
1915 && bfd_is_abs_section (p->sec->output_section))
1916 {
1917 /* Input section has been discarded, either because
1918 it is a copy of a linkonce section or due to
1919 linker script /DISCARD/, so we'll be discarding
1920 the relocs too. */
1921 }
1922 else if (p->count != 0)
1923 {
1924 srela = elf_section_data (p->sec)->sreloc;
1925 srela->size += p->count * sizeof (Elf32_External_Rela);
1926 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1927 info->flags |= DF_TEXTREL;
1928 }
1929 }
1930 }
1931
1932 local_got = elf_local_got_refcounts (ibfd);
1933 if (!local_got)
1934 continue;
1935
1936 symtab_hdr = &elf_symtab_hdr (ibfd);
1937 locsymcount = symtab_hdr->sh_info;
1938 end_local_got = local_got + locsymcount;
1939 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1940 s = htab->elf.sgot;
1941 srela = htab->elf.srelgot;
1942 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1943 {
1944 if (*local_got > 0)
1945 {
1946 *local_got = s->size;
1947 s->size += GOT_ENTRY_SIZE;
1948 if (*local_tls_type == GOT_TLS_GD)
1949 s->size += GOT_ENTRY_SIZE;
1950 if (bfd_link_pic (info))
1951 srela->size += sizeof (Elf32_External_Rela);
1952 }
1953 else
1954 *local_got = (bfd_vma) -1;
1955 }
1956 local_plt = elf_s390_local_plt (ibfd);
1957 for (i = 0; i < symtab_hdr->sh_info; i++)
1958 {
1959 if (local_plt[i].plt.refcount > 0)
1960 {
1961 local_plt[i].plt.offset = htab->elf.iplt->size;
1962 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1963 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1964 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1965 }
1966 else
1967 local_plt[i].plt.offset = (bfd_vma) -1;
1968 }
1969 }
1970
1971 if (htab->tls_ldm_got.refcount > 0)
1972 {
1973 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1974 relocs. */
1975 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1976 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1977 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1978 }
1979 else
1980 htab->tls_ldm_got.offset = -1;
1981
1982 /* Allocate global sym .plt and .got entries, and space for global
1983 sym dynamic relocs. */
1984 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1985
1986 /* We now have determined the sizes of the various dynamic sections.
1987 Allocate memory for them. */
1988 relocs = FALSE;
1989 for (s = dynobj->sections; s != NULL; s = s->next)
1990 {
1991 if ((s->flags & SEC_LINKER_CREATED) == 0)
1992 continue;
1993
1994 if (s == htab->elf.splt
1995 || s == htab->elf.sgot
1996 || s == htab->elf.sgotplt
1997 || s == htab->elf.sdynbss
1998 || s == htab->elf.sdynrelro
1999 || s == htab->elf.iplt
2000 || s == htab->elf.igotplt
2001 || s == htab->irelifunc)
2002 {
2003 /* Strip this section if we don't need it; see the
2004 comment below. */
2005 }
2006 else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
2007 {
2008 if (s->size != 0)
2009 relocs = TRUE;
2010
2011 /* We use the reloc_count field as a counter if we need
2012 to copy relocs into the output file. */
2013 s->reloc_count = 0;
2014 }
2015 else
2016 {
2017 /* It's not one of our sections, so don't allocate space. */
2018 continue;
2019 }
2020
2021 if (s->size == 0)
2022 {
2023 /* If we don't need this section, strip it from the
2024 output file. This is to handle .rela.bss and
2025 .rela.plt. We must create it in
2026 create_dynamic_sections, because it must be created
2027 before the linker maps input sections to output
2028 sections. The linker does that before
2029 adjust_dynamic_symbol is called, and it is that
2030 function which decides whether anything needs to go
2031 into these sections. */
2032
2033 s->flags |= SEC_EXCLUDE;
2034 continue;
2035 }
2036
2037 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2038 continue;
2039
2040 /* Allocate memory for the section contents. We use bfd_zalloc
2041 here in case unused entries are not reclaimed before the
2042 section's contents are written out. This should not happen,
2043 but this way if it does, we get a R_390_NONE reloc instead
2044 of garbage. */
2045 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2046 if (s->contents == NULL)
2047 return FALSE;
2048 }
2049
2050 if (htab->elf.dynamic_sections_created)
2051 {
2052 /* Add some entries to the .dynamic section. We fill in the
2053 values later, in elf_s390_finish_dynamic_sections, but we
2054 must add the entries now so that we get the correct size for
2055 the .dynamic section. The DT_DEBUG entry is filled in by the
2056 dynamic linker and used by the debugger. */
2057 #define add_dynamic_entry(TAG, VAL) \
2058 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2059
2060 if (bfd_link_executable (info))
2061 {
2062 if (!add_dynamic_entry (DT_DEBUG, 0))
2063 return FALSE;
2064 }
2065
2066 if (htab->elf.splt->size != 0)
2067 {
2068 if (!add_dynamic_entry (DT_PLTGOT, 0)
2069 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2070 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2071 || !add_dynamic_entry (DT_JMPREL, 0))
2072 return FALSE;
2073 }
2074
2075 if (relocs)
2076 {
2077 if (!add_dynamic_entry (DT_RELA, 0)
2078 || !add_dynamic_entry (DT_RELASZ, 0)
2079 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2080 return FALSE;
2081
2082 /* If any dynamic relocs apply to a read-only section,
2083 then we need a DT_TEXTREL entry. */
2084 if ((info->flags & DF_TEXTREL) == 0)
2085 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2086
2087 if ((info->flags & DF_TEXTREL) != 0)
2088 {
2089 if (!add_dynamic_entry (DT_TEXTREL, 0))
2090 return FALSE;
2091 }
2092 }
2093 }
2094 #undef add_dynamic_entry
2095
2096 return TRUE;
2097 }
2098
2099 /* Return the base VMA address which should be subtracted from real addresses
2100 when resolving @dtpoff relocation.
2101 This is PT_TLS segment p_vaddr. */
2102
2103 static bfd_vma
2104 dtpoff_base (struct bfd_link_info *info)
2105 {
2106 /* If tls_sec is NULL, we should have signalled an error already. */
2107 if (elf_hash_table (info)->tls_sec == NULL)
2108 return 0;
2109 return elf_hash_table (info)->tls_sec->vma;
2110 }
2111
2112 /* Return the relocation value for @tpoff relocation
2113 if STT_TLS virtual address is ADDRESS. */
2114
2115 static bfd_vma
2116 tpoff (struct bfd_link_info *info, bfd_vma address)
2117 {
2118 struct elf_link_hash_table *htab = elf_hash_table (info);
2119
2120 /* If tls_sec is NULL, we should have signalled an error already. */
2121 if (htab->tls_sec == NULL)
2122 return 0;
2123 return htab->tls_size + htab->tls_sec->vma - address;
2124 }
2125
2126 /* Complain if TLS instruction relocation is against an invalid
2127 instruction. */
2128
2129 static void
2130 invalid_tls_insn (bfd *input_bfd,
2131 asection *input_section,
2132 Elf_Internal_Rela *rel)
2133 {
2134 reloc_howto_type *howto;
2135
2136 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2137 _bfd_error_handler
2138 /* xgettext:c-format */
2139 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2140 input_bfd,
2141 input_section,
2142 (uint64_t) rel->r_offset,
2143 howto->name);
2144 bfd_set_error (bfd_error_bad_value);
2145 }
2146
2147 /* Relocate a 390 ELF section. */
2148
2149 static bfd_boolean
2150 elf_s390_relocate_section (bfd *output_bfd,
2151 struct bfd_link_info *info,
2152 bfd *input_bfd,
2153 asection *input_section,
2154 bfd_byte *contents,
2155 Elf_Internal_Rela *relocs,
2156 Elf_Internal_Sym *local_syms,
2157 asection **local_sections)
2158 {
2159 struct elf_s390_link_hash_table *htab;
2160 Elf_Internal_Shdr *symtab_hdr;
2161 struct elf_link_hash_entry **sym_hashes;
2162 bfd_vma *local_got_offsets;
2163 Elf_Internal_Rela *rel;
2164 Elf_Internal_Rela *relend;
2165
2166 if (!is_s390_elf (input_bfd))
2167 {
2168 bfd_set_error (bfd_error_wrong_format);
2169 return FALSE;
2170 }
2171
2172 htab = elf_s390_hash_table (info);
2173 symtab_hdr = &elf_symtab_hdr (input_bfd);
2174 sym_hashes = elf_sym_hashes (input_bfd);
2175 local_got_offsets = elf_local_got_offsets (input_bfd);
2176
2177 rel = relocs;
2178 relend = relocs + input_section->reloc_count;
2179 for (; rel < relend; rel++)
2180 {
2181 unsigned int r_type;
2182 reloc_howto_type *howto;
2183 unsigned long r_symndx;
2184 struct elf_link_hash_entry *h;
2185 Elf_Internal_Sym *sym;
2186 asection *sec;
2187 bfd_vma off;
2188 bfd_vma relocation;
2189 bfd_boolean unresolved_reloc;
2190 bfd_reloc_status_type r;
2191 int tls_type;
2192 asection *base_got = htab->elf.sgot;
2193 bfd_boolean resolved_to_zero;
2194
2195 r_type = ELF32_R_TYPE (rel->r_info);
2196 if (r_type == (int) R_390_GNU_VTINHERIT
2197 || r_type == (int) R_390_GNU_VTENTRY)
2198 continue;
2199 if (r_type >= (int) R_390_max)
2200 {
2201 bfd_set_error (bfd_error_bad_value);
2202 return FALSE;
2203 }
2204
2205 howto = elf_howto_table + r_type;
2206 r_symndx = ELF32_R_SYM (rel->r_info);
2207
2208 h = NULL;
2209 sym = NULL;
2210 sec = NULL;
2211 unresolved_reloc = FALSE;
2212 if (r_symndx < symtab_hdr->sh_info)
2213 {
2214 sym = local_syms + r_symndx;
2215 sec = local_sections[r_symndx];
2216 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2217 {
2218 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2219 if (local_plt == NULL)
2220 return FALSE;
2221
2222 /* Address of the PLT slot. */
2223 relocation = (htab->elf.iplt->output_section->vma
2224 + htab->elf.iplt->output_offset
2225 + local_plt[r_symndx].plt.offset);
2226
2227 switch (r_type)
2228 {
2229 case R_390_PLTOFF16:
2230 case R_390_PLTOFF32:
2231 relocation -= htab->elf.sgot->output_section->vma;
2232 break;
2233 case R_390_GOTPLT12:
2234 case R_390_GOTPLT16:
2235 case R_390_GOTPLT20:
2236 case R_390_GOTPLT32:
2237 case R_390_GOTPLTENT:
2238 case R_390_GOT12:
2239 case R_390_GOT16:
2240 case R_390_GOT20:
2241 case R_390_GOT32:
2242 case R_390_GOTENT:
2243 {
2244 /* Write the PLT slot address into the GOT slot. */
2245 bfd_put_32 (output_bfd, relocation,
2246 htab->elf.sgot->contents +
2247 local_got_offsets[r_symndx]);
2248 relocation = (local_got_offsets[r_symndx] +
2249 htab->elf.sgot->output_offset);
2250
2251 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2252 relocation += htab->elf.sgot->output_section->vma;
2253 break;
2254 }
2255 default:
2256 break;
2257 }
2258 /* The output section is needed later in
2259 finish_dynamic_section when creating the dynamic
2260 relocation. */
2261 local_plt[r_symndx].sec = sec;
2262 goto do_relocation;
2263 }
2264 else
2265 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2266 }
2267 else
2268 {
2269 bfd_boolean warned ATTRIBUTE_UNUSED;
2270 bfd_boolean ignored ATTRIBUTE_UNUSED;
2271
2272 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2273 r_symndx, symtab_hdr, sym_hashes,
2274 h, sec, relocation,
2275 unresolved_reloc, warned, ignored);
2276 }
2277
2278 if (sec != NULL && discarded_section (sec))
2279 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2280 rel, 1, relend, howto, 0, contents);
2281
2282 if (bfd_link_relocatable (info))
2283 continue;
2284
2285 resolved_to_zero = (h != NULL
2286 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2287
2288 switch (r_type)
2289 {
2290 case R_390_GOTPLT12:
2291 case R_390_GOTPLT16:
2292 case R_390_GOTPLT20:
2293 case R_390_GOTPLT32:
2294 case R_390_GOTPLTENT:
2295 /* There are three cases for a GOTPLT relocation. 1) The
2296 relocation is against the jump slot entry of a plt that
2297 will get emitted to the output file. 2) The relocation
2298 is against the jump slot of a plt entry that has been
2299 removed. elf_s390_adjust_gotplt has created a GOT entry
2300 as replacement. 3) The relocation is against a local symbol.
2301 Cases 2) and 3) are the same as the GOT relocation code
2302 so we just have to test for case 1 and fall through for
2303 the other two. */
2304 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2305 {
2306 bfd_vma plt_index;
2307
2308 if (s390_is_ifunc_symbol_p (h))
2309 {
2310 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2311 relocation = (plt_index * GOT_ENTRY_SIZE +
2312 htab->elf.igotplt->output_offset);
2313 if (r_type == R_390_GOTPLTENT)
2314 relocation += htab->elf.igotplt->output_section->vma;
2315 }
2316 else
2317 {
2318 /* Calc. index no.
2319 Current offset - size first entry / entry size. */
2320 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2321 PLT_ENTRY_SIZE;
2322
2323 /* Offset in GOT is PLT index plus GOT headers(3)
2324 times 4, addr & GOT addr. */
2325 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2326 if (r_type == R_390_GOTPLTENT)
2327 relocation += htab->elf.sgot->output_section->vma;
2328 }
2329 unresolved_reloc = FALSE;
2330
2331 }
2332 /* Fall through. */
2333
2334 case R_390_GOT12:
2335 case R_390_GOT16:
2336 case R_390_GOT20:
2337 case R_390_GOT32:
2338 case R_390_GOTENT:
2339 /* Relocation is to the entry for this symbol in the global
2340 offset table. */
2341 if (base_got == NULL)
2342 abort ();
2343
2344 if (h != NULL)
2345 {
2346 bfd_boolean dyn;
2347
2348 off = h->got.offset;
2349 dyn = htab->elf.dynamic_sections_created;
2350
2351 if (s390_is_ifunc_symbol_p (h))
2352 {
2353 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2354 if (off == (bfd_vma)-1)
2355 {
2356 /* No explicit GOT usage so redirect to the
2357 got.iplt slot. */
2358 base_got = htab->elf.igotplt;
2359 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2360 }
2361 else
2362 {
2363 /* Explicit GOT slots must contain the address
2364 of the PLT slot. This will be handled in
2365 finish_dynamic_symbol. */
2366 }
2367 }
2368 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2369 bfd_link_pic (info),
2370 h)
2371 || (bfd_link_pic (info)
2372 && SYMBOL_REFERENCES_LOCAL (info, h))
2373 || (ELF_ST_VISIBILITY (h->other)
2374 && h->root.type == bfd_link_hash_undefweak))
2375
2376 {
2377 /* This is actually a static link, or it is a
2378 -Bsymbolic link and the symbol is defined
2379 locally, or the symbol was forced to be local
2380 because of a version file. We must initialize
2381 this entry in the global offset table. Since the
2382 offset must always be a multiple of 2, we use the
2383 least significant bit to record whether we have
2384 initialized it already.
2385
2386 When doing a dynamic link, we create a .rel.got
2387 relocation entry to initialize the value. This
2388 is done in the finish_dynamic_symbol routine. */
2389 if ((off & 1) != 0)
2390 off &= ~1;
2391 else
2392 {
2393 bfd_put_32 (output_bfd, relocation,
2394 base_got->contents + off);
2395 h->got.offset |= 1;
2396 }
2397
2398 if ((h->def_regular
2399 && bfd_link_pic (info)
2400 && SYMBOL_REFERENCES_LOCAL (info, h))
2401 /* lrl rx,sym@GOTENT -> larl rx, sym */
2402 && ((r_type == R_390_GOTENT
2403 && (bfd_get_16 (input_bfd,
2404 contents + rel->r_offset - 2)
2405 & 0xff0f) == 0xc40d)
2406 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2407 || (r_type == R_390_GOT20
2408 && (bfd_get_32 (input_bfd,
2409 contents + rel->r_offset - 2)
2410 & 0xff00f000) == 0xe300c000
2411 && bfd_get_8 (input_bfd,
2412 contents + rel->r_offset + 3) == 0x58)))
2413 {
2414 unsigned short new_insn =
2415 (0xc000 | (bfd_get_8 (input_bfd,
2416 contents + rel->r_offset - 1) & 0xf0));
2417 bfd_put_16 (output_bfd, new_insn,
2418 contents + rel->r_offset - 2);
2419 r_type = R_390_PC32DBL;
2420 rel->r_addend = 2;
2421 howto = elf_howto_table + r_type;
2422 relocation = h->root.u.def.value
2423 + h->root.u.def.section->output_section->vma
2424 + h->root.u.def.section->output_offset;
2425 goto do_relocation;
2426 }
2427 }
2428 else
2429 unresolved_reloc = FALSE;
2430 }
2431 else
2432 {
2433 if (local_got_offsets == NULL)
2434 abort ();
2435
2436 off = local_got_offsets[r_symndx];
2437
2438 /* The offset must always be a multiple of 4. We use
2439 the least significant bit to record whether we have
2440 already generated the necessary reloc. */
2441 if ((off & 1) != 0)
2442 off &= ~1;
2443 else
2444 {
2445 bfd_put_32 (output_bfd, relocation,
2446 htab->elf.sgot->contents + off);
2447
2448 if (bfd_link_pic (info))
2449 {
2450 asection *srelgot;
2451 Elf_Internal_Rela outrel;
2452 bfd_byte *loc;
2453
2454 srelgot = htab->elf.srelgot;
2455 if (srelgot == NULL)
2456 abort ();
2457
2458 outrel.r_offset = (htab->elf.sgot->output_section->vma
2459 + htab->elf.sgot->output_offset
2460 + off);
2461 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2462 outrel.r_addend = relocation;
2463 loc = srelgot->contents;
2464 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2465 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2466 }
2467
2468 local_got_offsets[r_symndx] |= 1;
2469 }
2470 }
2471
2472 if (off >= (bfd_vma) -2)
2473 abort ();
2474
2475 relocation = base_got->output_offset + off;
2476
2477 /* For @GOTENT the relocation is against the offset between
2478 the instruction and the symbols entry in the GOT and not
2479 between the start of the GOT and the symbols entry. We
2480 add the vma of the GOT to get the correct value. */
2481 if ( r_type == R_390_GOTENT
2482 || r_type == R_390_GOTPLTENT)
2483 relocation += base_got->output_section->vma;
2484
2485 break;
2486
2487 case R_390_GOTOFF16:
2488 case R_390_GOTOFF32:
2489 /* Relocation is relative to the start of the global offset
2490 table. */
2491
2492 if (h != NULL
2493 && s390_is_ifunc_symbol_p (h)
2494 && h->def_regular
2495 && !bfd_link_executable (info))
2496 {
2497 relocation = (htab->elf.iplt->output_section->vma
2498 + htab->elf.iplt->output_offset
2499 + h->plt.offset
2500 - htab->elf.sgot->output_section->vma);
2501 goto do_relocation;
2502 }
2503
2504 /* Note that sgot->output_offset is not involved in this
2505 calculation. We always want the start of .got. If we
2506 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2507 permitted by the ABI, we might have to change this
2508 calculation. */
2509 relocation -= htab->elf.sgot->output_section->vma;
2510 break;
2511
2512 case R_390_GOTPC:
2513 case R_390_GOTPCDBL:
2514 /* Use global offset table as symbol value. */
2515 relocation = htab->elf.sgot->output_section->vma;
2516 unresolved_reloc = FALSE;
2517 break;
2518
2519 case R_390_PLT12DBL:
2520 case R_390_PLT16DBL:
2521 case R_390_PLT24DBL:
2522 case R_390_PLT32DBL:
2523 case R_390_PLT32:
2524 /* Relocation is to the entry for this symbol in the
2525 procedure linkage table. */
2526
2527 /* Resolve a PLT32 reloc against a local symbol directly,
2528 without using the procedure linkage table. */
2529 if (h == NULL)
2530 break;
2531
2532 if (h->plt.offset == (bfd_vma) -1
2533 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2534 {
2535 /* We didn't make a PLT entry for this symbol. This
2536 happens when statically linking PIC code, or when
2537 using -Bsymbolic. */
2538 break;
2539 }
2540
2541 if (s390_is_ifunc_symbol_p (h))
2542 relocation = (htab->elf.iplt->output_section->vma
2543 + htab->elf.iplt->output_offset
2544 + h->plt.offset);
2545 else
2546 relocation = (htab->elf.splt->output_section->vma
2547 + htab->elf.splt->output_offset
2548 + h->plt.offset);
2549 unresolved_reloc = FALSE;
2550 break;
2551
2552 case R_390_PLTOFF16:
2553 case R_390_PLTOFF32:
2554 /* Relocation is to the entry for this symbol in the
2555 procedure linkage table relative to the start of the GOT. */
2556
2557 /* For local symbols or if we didn't make a PLT entry for
2558 this symbol resolve the symbol directly. */
2559 if (h == NULL
2560 || h->plt.offset == (bfd_vma) -1
2561 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2562 {
2563 relocation -= htab->elf.sgot->output_section->vma;
2564 break;
2565 }
2566
2567 if (s390_is_ifunc_symbol_p (h))
2568 relocation = (htab->elf.iplt->output_section->vma
2569 + htab->elf.iplt->output_offset
2570 + h->plt.offset
2571 - htab->elf.sgot->output_section->vma);
2572 else
2573 relocation = (htab->elf.splt->output_section->vma
2574 + htab->elf.splt->output_offset
2575 + h->plt.offset
2576 - htab->elf.sgot->output_section->vma);
2577 unresolved_reloc = FALSE;
2578 break;
2579
2580 case R_390_PC16:
2581 case R_390_PC12DBL:
2582 case R_390_PC16DBL:
2583 case R_390_PC24DBL:
2584 case R_390_PC32DBL:
2585 case R_390_PC32:
2586 if (h != NULL
2587 && s390_is_ifunc_symbol_p (h)
2588 && h->def_regular
2589 && !bfd_link_executable (info))
2590 {
2591 /* This will not work our if the function does not
2592 happen to set up the GOT pointer for some other
2593 reason. 31 bit PLT entries require r12 to hold the
2594 GOT pointer.
2595 FIXME: Implement an errorcheck.
2596 NOTE: It will work when brasl is not available
2597 (e.g. with -m31 -march=g5) since a local function
2598 call then does use GOTOFF which implies r12 being set
2599 up. */
2600 relocation = (htab->elf.iplt->output_section->vma
2601 + htab->elf.iplt->output_offset
2602 + h ->plt.offset);
2603 goto do_relocation;
2604 }
2605 /* Fall through. */
2606
2607 case R_390_8:
2608 case R_390_16:
2609 case R_390_32:
2610 if ((input_section->flags & SEC_ALLOC) == 0)
2611 break;
2612
2613 if (h != NULL
2614 && s390_is_ifunc_symbol_p (h)
2615 && h->def_regular)
2616 {
2617 if (!bfd_link_pic (info))
2618 {
2619 /* For a non-shared object STT_GNU_IFUNC symbol must
2620 go through PLT. */
2621 relocation = (htab->elf.iplt->output_section->vma
2622 + htab->elf.iplt->output_offset
2623 + h ->plt.offset);
2624 goto do_relocation;
2625 }
2626 else
2627 {
2628 /* For shared objects a runtime relocation is needed. */
2629
2630 Elf_Internal_Rela outrel;
2631 asection *sreloc;
2632
2633 /* Need a dynamic relocation to get the real function
2634 address. */
2635 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2636 info,
2637 input_section,
2638 rel->r_offset);
2639 if (outrel.r_offset == (bfd_vma) -1
2640 || outrel.r_offset == (bfd_vma) -2)
2641 abort ();
2642
2643 outrel.r_offset += (input_section->output_section->vma
2644 + input_section->output_offset);
2645
2646 if (h->dynindx == -1
2647 || h->forced_local
2648 || bfd_link_executable (info))
2649 {
2650 /* This symbol is resolved locally. */
2651 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2652 outrel.r_addend = (h->root.u.def.value
2653 + h->root.u.def.section->output_section->vma
2654 + h->root.u.def.section->output_offset);
2655 }
2656 else
2657 {
2658 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2659 outrel.r_addend = 0;
2660 }
2661
2662 sreloc = htab->elf.irelifunc;
2663 elf_append_rela (output_bfd, sreloc, &outrel);
2664
2665 /* If this reloc is against an external symbol, we
2666 do not want to fiddle with the addend. Otherwise,
2667 we need to include the symbol value so that it
2668 becomes an addend for the dynamic reloc. For an
2669 internal symbol, we have updated addend. */
2670 continue;
2671 }
2672 }
2673
2674 if ((bfd_link_pic (info)
2675 && (h == NULL
2676 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2677 && !resolved_to_zero)
2678 || h->root.type != bfd_link_hash_undefweak)
2679 && ((r_type != R_390_PC16
2680 && r_type != R_390_PC12DBL
2681 && r_type != R_390_PC16DBL
2682 && r_type != R_390_PC24DBL
2683 && r_type != R_390_PC32DBL
2684 && r_type != R_390_PC32)
2685 || !SYMBOL_CALLS_LOCAL (info, h)))
2686 || (ELIMINATE_COPY_RELOCS
2687 && !bfd_link_pic (info)
2688 && h != NULL
2689 && h->dynindx != -1
2690 && !h->non_got_ref
2691 && ((h->def_dynamic
2692 && !h->def_regular)
2693 || h->root.type == bfd_link_hash_undefweak
2694 || h->root.type == bfd_link_hash_undefined)))
2695 {
2696 Elf_Internal_Rela outrel;
2697 bfd_boolean skip, relocate;
2698 asection *sreloc;
2699 bfd_byte *loc;
2700
2701 /* When generating a shared object, these relocations
2702 are copied into the output file to be resolved at run
2703 time. */
2704
2705 skip = FALSE;
2706 relocate = FALSE;
2707
2708 outrel.r_offset =
2709 _bfd_elf_section_offset (output_bfd, info, input_section,
2710 rel->r_offset);
2711 if (outrel.r_offset == (bfd_vma) -1)
2712 skip = TRUE;
2713 else if (outrel.r_offset == (bfd_vma) -2)
2714 skip = TRUE, relocate = TRUE;
2715 outrel.r_offset += (input_section->output_section->vma
2716 + input_section->output_offset);
2717
2718 if (skip)
2719 memset (&outrel, 0, sizeof outrel);
2720 else if (h != NULL
2721 && h->dynindx != -1
2722 && (r_type == R_390_PC16
2723 || r_type == R_390_PC12DBL
2724 || r_type == R_390_PC16DBL
2725 || r_type == R_390_PC24DBL
2726 || r_type == R_390_PC32DBL
2727 || r_type == R_390_PC32
2728 || !bfd_link_pic (info)
2729 || !SYMBOLIC_BIND (info, h)
2730 || !h->def_regular))
2731 {
2732 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2733 outrel.r_addend = rel->r_addend;
2734 }
2735 else
2736 {
2737 /* This symbol is local, or marked to become local. */
2738 outrel.r_addend = relocation + rel->r_addend;
2739 if (r_type == R_390_32)
2740 {
2741 relocate = TRUE;
2742 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2743 }
2744 else
2745 {
2746 long sindx;
2747
2748 if (bfd_is_abs_section (sec))
2749 sindx = 0;
2750 else if (sec == NULL || sec->owner == NULL)
2751 {
2752 bfd_set_error(bfd_error_bad_value);
2753 return FALSE;
2754 }
2755 else
2756 {
2757 asection *osec;
2758
2759 osec = sec->output_section;
2760 sindx = elf_section_data (osec)->dynindx;
2761 if (sindx == 0)
2762 {
2763 osec = htab->elf.text_index_section;
2764 sindx = elf_section_data (osec)->dynindx;
2765 }
2766 BFD_ASSERT (sindx != 0);
2767
2768 /* We are turning this relocation into one
2769 against a section symbol, so subtract out
2770 the output section's address but not the
2771 offset of the input section in the output
2772 section. */
2773 outrel.r_addend -= osec->vma;
2774 }
2775 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2776 }
2777 }
2778
2779 sreloc = elf_section_data (input_section)->sreloc;
2780 if (sreloc == NULL)
2781 abort ();
2782
2783 loc = sreloc->contents;
2784 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2785 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2786
2787 /* If this reloc is against an external symbol, we do
2788 not want to fiddle with the addend. Otherwise, we
2789 need to include the symbol value so that it becomes
2790 an addend for the dynamic reloc. */
2791 if (! relocate)
2792 continue;
2793 }
2794 break;
2795
2796 /* Relocations for tls literal pool entries. */
2797 case R_390_TLS_IE32:
2798 if (bfd_link_pic (info))
2799 {
2800 Elf_Internal_Rela outrel;
2801 asection *sreloc;
2802 bfd_byte *loc;
2803
2804 outrel.r_offset = rel->r_offset
2805 + input_section->output_section->vma
2806 + input_section->output_offset;
2807 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2808 sreloc = elf_section_data (input_section)->sreloc;
2809 if (sreloc == NULL)
2810 abort ();
2811 loc = sreloc->contents;
2812 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2813 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2814 }
2815 /* Fall through. */
2816
2817 case R_390_TLS_GD32:
2818 case R_390_TLS_GOTIE32:
2819 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2820 tls_type = GOT_UNKNOWN;
2821 if (h == NULL && local_got_offsets)
2822 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2823 else if (h != NULL)
2824 {
2825 tls_type = elf_s390_hash_entry(h)->tls_type;
2826 if (!bfd_link_pic (info)
2827 && h->dynindx == -1
2828 && tls_type >= GOT_TLS_IE)
2829 r_type = R_390_TLS_LE32;
2830 }
2831 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2832 r_type = R_390_TLS_IE32;
2833
2834 if (r_type == R_390_TLS_LE32)
2835 {
2836 /* This relocation gets optimized away by the local exec
2837 access optimization. */
2838 BFD_ASSERT (! unresolved_reloc);
2839 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2840 contents + rel->r_offset);
2841 continue;
2842 }
2843
2844 if (htab->elf.sgot == NULL)
2845 abort ();
2846
2847 if (h != NULL)
2848 off = h->got.offset;
2849 else
2850 {
2851 if (local_got_offsets == NULL)
2852 abort ();
2853
2854 off = local_got_offsets[r_symndx];
2855 }
2856
2857 emit_tls_relocs:
2858
2859 if ((off & 1) != 0)
2860 off &= ~1;
2861 else
2862 {
2863 Elf_Internal_Rela outrel;
2864 bfd_byte *loc;
2865 int dr_type, indx;
2866
2867 if (htab->elf.srelgot == NULL)
2868 abort ();
2869
2870 outrel.r_offset = (htab->elf.sgot->output_section->vma
2871 + htab->elf.sgot->output_offset + off);
2872
2873 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2874 if (r_type == R_390_TLS_GD32)
2875 dr_type = R_390_TLS_DTPMOD;
2876 else
2877 dr_type = R_390_TLS_TPOFF;
2878 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2879 outrel.r_addend = relocation - dtpoff_base (info);
2880 else
2881 outrel.r_addend = 0;
2882 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2883 loc = htab->elf.srelgot->contents;
2884 loc += htab->elf.srelgot->reloc_count++
2885 * sizeof (Elf32_External_Rela);
2886 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2887
2888 if (r_type == R_390_TLS_GD32)
2889 {
2890 if (indx == 0)
2891 {
2892 BFD_ASSERT (! unresolved_reloc);
2893 bfd_put_32 (output_bfd,
2894 relocation - dtpoff_base (info),
2895 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2896 }
2897 else
2898 {
2899 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2900 outrel.r_offset += GOT_ENTRY_SIZE;
2901 outrel.r_addend = 0;
2902 htab->elf.srelgot->reloc_count++;
2903 loc += sizeof (Elf32_External_Rela);
2904 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2905 }
2906 }
2907
2908 if (h != NULL)
2909 h->got.offset |= 1;
2910 else
2911 local_got_offsets[r_symndx] |= 1;
2912 }
2913
2914 if (off >= (bfd_vma) -2)
2915 abort ();
2916 if (r_type == ELF32_R_TYPE (rel->r_info))
2917 {
2918 relocation = htab->elf.sgot->output_offset + off;
2919 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2920 relocation += htab->elf.sgot->output_section->vma;
2921 unresolved_reloc = FALSE;
2922 }
2923 else
2924 {
2925 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2926 contents + rel->r_offset);
2927 continue;
2928 }
2929 break;
2930
2931 case R_390_TLS_GOTIE12:
2932 case R_390_TLS_GOTIE20:
2933 case R_390_TLS_IEENT:
2934 if (h == NULL)
2935 {
2936 if (local_got_offsets == NULL)
2937 abort();
2938 off = local_got_offsets[r_symndx];
2939 if (bfd_link_pic (info))
2940 goto emit_tls_relocs;
2941 }
2942 else
2943 {
2944 off = h->got.offset;
2945 tls_type = elf_s390_hash_entry(h)->tls_type;
2946 if (bfd_link_pic (info)
2947 || h->dynindx != -1
2948 || tls_type < GOT_TLS_IE)
2949 goto emit_tls_relocs;
2950 }
2951
2952 if (htab->elf.sgot == NULL)
2953 abort ();
2954
2955 BFD_ASSERT (! unresolved_reloc);
2956 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2957 htab->elf.sgot->contents + off);
2958 relocation = htab->elf.sgot->output_offset + off;
2959 if (r_type == R_390_TLS_IEENT)
2960 relocation += htab->elf.sgot->output_section->vma;
2961 unresolved_reloc = FALSE;
2962 break;
2963
2964 case R_390_TLS_LDM32:
2965 if (! bfd_link_pic (info))
2966 /* The literal pool entry this relocation refers to gets ignored
2967 by the optimized code of the local exec model. Do nothing
2968 and the value will turn out zero. */
2969 continue;
2970
2971 if (htab->elf.sgot == NULL)
2972 abort ();
2973
2974 off = htab->tls_ldm_got.offset;
2975 if (off & 1)
2976 off &= ~1;
2977 else
2978 {
2979 Elf_Internal_Rela outrel;
2980 bfd_byte *loc;
2981
2982 if (htab->elf.srelgot == NULL)
2983 abort ();
2984
2985 outrel.r_offset = (htab->elf.sgot->output_section->vma
2986 + htab->elf.sgot->output_offset + off);
2987
2988 bfd_put_32 (output_bfd, 0,
2989 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2990 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2991 outrel.r_addend = 0;
2992 loc = htab->elf.srelgot->contents;
2993 loc += htab->elf.srelgot->reloc_count++
2994 * sizeof (Elf32_External_Rela);
2995 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2996 htab->tls_ldm_got.offset |= 1;
2997 }
2998 relocation = htab->elf.sgot->output_offset + off;
2999 unresolved_reloc = FALSE;
3000 break;
3001
3002 case R_390_TLS_LE32:
3003 if (bfd_link_dll (info))
3004 {
3005 /* Linking a shared library with non-fpic code requires
3006 a R_390_TLS_TPOFF relocation. */
3007 Elf_Internal_Rela outrel;
3008 asection *sreloc;
3009 bfd_byte *loc;
3010 int indx;
3011
3012 outrel.r_offset = rel->r_offset
3013 + input_section->output_section->vma
3014 + input_section->output_offset;
3015 if (h != NULL && h->dynindx != -1)
3016 indx = h->dynindx;
3017 else
3018 indx = 0;
3019 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3020 if (indx == 0)
3021 outrel.r_addend = relocation - dtpoff_base (info);
3022 else
3023 outrel.r_addend = 0;
3024 sreloc = elf_section_data (input_section)->sreloc;
3025 if (sreloc == NULL)
3026 abort ();
3027 loc = sreloc->contents;
3028 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3029 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3030 }
3031 else
3032 {
3033 BFD_ASSERT (! unresolved_reloc);
3034 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3035 contents + rel->r_offset);
3036 }
3037 continue;
3038
3039 case R_390_TLS_LDO32:
3040 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3041 relocation -= dtpoff_base (info);
3042 else
3043 /* When converting LDO to LE, we must negate. */
3044 relocation = -tpoff (info, relocation);
3045 break;
3046
3047 /* Relocations for tls instructions. */
3048 case R_390_TLS_LOAD:
3049 case R_390_TLS_GDCALL:
3050 case R_390_TLS_LDCALL:
3051 tls_type = GOT_UNKNOWN;
3052 if (h == NULL && local_got_offsets)
3053 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3054 else if (h != NULL)
3055 tls_type = elf_s390_hash_entry(h)->tls_type;
3056
3057 if (tls_type == GOT_TLS_GD)
3058 continue;
3059
3060 if (r_type == R_390_TLS_LOAD)
3061 {
3062 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3063 {
3064 /* IE->LE transition. Four valid cases:
3065 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3066 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3067 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3068 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3069 unsigned int insn, ry;
3070
3071 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3072 if ((insn & 0xff00f000) == 0x58000000)
3073 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3074 ry = (insn & 0x000f0000);
3075 else if ((insn & 0xff0f0000) == 0x58000000)
3076 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3077 ry = (insn & 0x0000f000) << 4;
3078 else if ((insn & 0xff00f000) == 0x5800c000)
3079 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3080 ry = (insn & 0x000f0000);
3081 else if ((insn & 0xff0f0000) == 0x580c0000)
3082 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3083 ry = (insn & 0x0000f000) << 4;
3084 else
3085 {
3086 invalid_tls_insn (input_bfd, input_section, rel);
3087 return FALSE;
3088 }
3089 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3090 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3091 }
3092 }
3093 else if (r_type == R_390_TLS_GDCALL)
3094 {
3095 unsigned int insn;
3096
3097 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3098 if ((insn & 0xff000fff) != 0x4d000000 &&
3099 (insn & 0xffff0000) != 0xc0e50000 &&
3100 (insn & 0xff000000) != 0x0d000000)
3101 {
3102 invalid_tls_insn (input_bfd, input_section, rel);
3103 return FALSE;
3104 }
3105 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3106 {
3107 if ((insn & 0xff000000) == 0x0d000000)
3108 {
3109 /* GD->LE transition.
3110 basr rx, ry -> nopr r7 */
3111 insn = 0x07070000 | (insn & 0xffff);
3112 }
3113 else if ((insn & 0xff000000) == 0x4d000000)
3114 {
3115 /* GD->LE transition.
3116 bas %r14,0(%rx,%r13) -> bc 0,0 */
3117 insn = 0x47000000;
3118 }
3119 else
3120 {
3121 /* GD->LE transition.
3122 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3123 insn = 0xc0040000;
3124 bfd_put_16 (output_bfd, 0x0000,
3125 contents + rel->r_offset + 4);
3126 }
3127 }
3128 else
3129 {
3130 /* If basr is used in the pic case to invoke
3131 _tls_get_offset, something went wrong before. */
3132 if ((insn & 0xff000000) == 0x0d000000)
3133 {
3134 invalid_tls_insn (input_bfd, input_section, rel);
3135 return FALSE;
3136 }
3137
3138 if ((insn & 0xff000000) == 0x4d000000)
3139 {
3140 /* GD->IE transition.
3141 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3142 insn = 0x5822c000;
3143 }
3144 else
3145 {
3146 /* GD->IE transition.
3147 brasl %r14,__tls_get_addr@plt ->
3148 l %r2,0(%r2,%r12) ; bcr 0,0 */
3149 insn = 0x5822c000;
3150 bfd_put_16 (output_bfd, 0x0700,
3151 contents + rel->r_offset + 4);
3152 }
3153 }
3154 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3155 }
3156 else if (r_type == R_390_TLS_LDCALL)
3157 {
3158 if (!bfd_link_pic (info))
3159 {
3160 unsigned int insn;
3161
3162 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3163 if ((insn & 0xff000fff) != 0x4d000000 &&
3164 (insn & 0xffff0000) != 0xc0e50000 &&
3165 (insn & 0xff000000) != 0x0d000000)
3166 {
3167 invalid_tls_insn (input_bfd, input_section, rel);
3168 return FALSE;
3169 }
3170
3171 if ((insn & 0xff000000) == 0x0d000000)
3172 {
3173 /* LD->LE transition.
3174 basr rx, ry -> nopr r7 */
3175 insn = 0x07070000 | (insn & 0xffff);
3176 }
3177 else if ((insn & 0xff000000) == 0x4d000000)
3178 {
3179 /* LD->LE transition.
3180 bas %r14,0(%rx,%r13) -> bc 0,0 */
3181 insn = 0x47000000;
3182 }
3183 else
3184 {
3185 /* LD->LE transition.
3186 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3187 insn = 0xc0040000;
3188 bfd_put_16 (output_bfd, 0x0000,
3189 contents + rel->r_offset + 4);
3190 }
3191 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3192 }
3193 }
3194 continue;
3195
3196 default:
3197 break;
3198 }
3199
3200 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3201 because such sections are not SEC_ALLOC and thus ld.so will
3202 not process them. */
3203 if (unresolved_reloc
3204 && !((input_section->flags & SEC_DEBUGGING) != 0
3205 && h->def_dynamic)
3206 && _bfd_elf_section_offset (output_bfd, info, input_section,
3207 rel->r_offset) != (bfd_vma) -1)
3208 _bfd_error_handler
3209 /* xgettext:c-format */
3210 (_("%pB(%pA+%#" PRIx64 "): "
3211 "unresolvable %s relocation against symbol `%s'"),
3212 input_bfd,
3213 input_section,
3214 (uint64_t) rel->r_offset,
3215 howto->name,
3216 h->root.root.string);
3217
3218 do_relocation:
3219
3220 /* When applying a 24 bit reloc we need to start one byte
3221 earlier. Otherwise the 32 bit get/put bfd operations might
3222 access a byte after the actual section. */
3223 if (r_type == R_390_PC24DBL
3224 || r_type == R_390_PLT24DBL)
3225 rel->r_offset--;
3226
3227 if (r_type == R_390_20
3228 || r_type == R_390_GOT20
3229 || r_type == R_390_GOTPLT20
3230 || r_type == R_390_TLS_GOTIE20)
3231 {
3232 relocation += rel->r_addend;
3233 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3234 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3235 contents, rel->r_offset,
3236 relocation, 0);
3237 }
3238 else
3239 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3240 contents, rel->r_offset,
3241 relocation, rel->r_addend);
3242
3243 if (r != bfd_reloc_ok)
3244 {
3245 const char *name;
3246
3247 if (h != NULL)
3248 name = h->root.root.string;
3249 else
3250 {
3251 name = bfd_elf_string_from_elf_section (input_bfd,
3252 symtab_hdr->sh_link,
3253 sym->st_name);
3254 if (name == NULL)
3255 return FALSE;
3256 if (*name == '\0')
3257 name = bfd_section_name (sec);
3258 }
3259
3260 if (r == bfd_reloc_overflow)
3261 (*info->callbacks->reloc_overflow)
3262 (info, (h ? &h->root : NULL), name, howto->name,
3263 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3264 else
3265 {
3266 _bfd_error_handler
3267 /* xgettext:c-format */
3268 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3269 input_bfd, input_section,
3270 (uint64_t) rel->r_offset, name, (int) r);
3271 return FALSE;
3272 }
3273 }
3274 }
3275
3276 return TRUE;
3277 }
3278
3279 /* Generate the PLT slots together with the dynamic relocations needed
3280 for IFUNC symbols. */
3281
3282 static void
3283 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3284 struct bfd_link_info *info,
3285 struct elf_link_hash_entry *h,
3286 struct elf_s390_link_hash_table *htab,
3287 bfd_vma iplt_offset,
3288 bfd_vma resolver_address)
3289 {
3290 bfd_vma iplt_index;
3291 bfd_vma got_offset;
3292 bfd_vma igotiplt_offset;
3293 Elf_Internal_Rela rela;
3294 bfd_byte *loc;
3295 asection *plt, *gotplt, *relplt;
3296 bfd_vma relative_offset;
3297
3298 if (htab->elf.iplt == NULL
3299 || htab->elf.igotplt == NULL
3300 || htab->elf.irelplt == NULL)
3301 abort ();
3302
3303 gotplt = htab->elf.igotplt;
3304 relplt = htab->elf.irelplt;
3305
3306 /* Index of the PLT slot within iplt section. */
3307 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3308 plt = htab->elf.iplt;
3309 /* Offset into the igot.plt section. */
3310 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3311 /* Offset into the got section. */
3312 got_offset = igotiplt_offset + gotplt->output_offset;
3313
3314 /* S390 uses halfwords for relative branch calc! */
3315 relative_offset = - (plt->output_offset +
3316 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3317 /* If offset is > 32768, branch to a previous branch
3318 390 can only handle +-64 K jumps. */
3319 if ( -32768 > (int) relative_offset )
3320 relative_offset
3321 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3322
3323 /* Fill in the entry in the procedure linkage table. */
3324 if (!bfd_link_pic (info))
3325 {
3326 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3327 PLT_ENTRY_SIZE);
3328
3329 /* Adjust jump to the first plt entry. */
3330 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3331 plt->contents + iplt_offset + 20);
3332
3333 /* Push the GOT offset field. */
3334 bfd_put_32 (output_bfd,
3335 (gotplt->output_section->vma
3336 + got_offset),
3337 plt->contents + iplt_offset + 24);
3338 }
3339 else if (got_offset < 4096)
3340 {
3341 /* The GOT offset is small enough to be used directly as
3342 displacement. */
3343 memcpy (plt->contents + iplt_offset,
3344 elf_s390_plt_pic12_entry,
3345 PLT_ENTRY_SIZE);
3346
3347 /* Put in the GOT offset as displacement value. The 0xc000
3348 value comes from the first word of the plt entry. Look
3349 at the elf_s390_plt_pic16_entry content. */
3350 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3351 plt->contents + iplt_offset + 2);
3352
3353 /* Adjust the jump to the first plt entry. */
3354 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3355 plt->contents + iplt_offset + 20);
3356 }
3357 else if (got_offset < 32768)
3358 {
3359 /* The GOT offset is too big for a displacement but small
3360 enough to be a signed 16 bit immediate value as it can be
3361 used in an lhi instruction. */
3362 memcpy (plt->contents + iplt_offset,
3363 elf_s390_plt_pic16_entry,
3364 PLT_ENTRY_SIZE);
3365
3366 /* Put in the GOT offset for the lhi instruction. */
3367 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3368 plt->contents + iplt_offset + 2);
3369
3370 /* Adjust the jump to the first plt entry. */
3371 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3372 plt->contents + iplt_offset + 20);
3373 }
3374 else
3375 {
3376 memcpy (plt->contents + iplt_offset,
3377 elf_s390_plt_pic_entry,
3378 PLT_ENTRY_SIZE);
3379
3380 /* Adjust the jump to the first plt entry. */
3381 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3382 plt->contents + iplt_offset + 20);
3383
3384 /* Push the GOT offset field. */
3385 bfd_put_32 (output_bfd, got_offset,
3386 plt->contents + iplt_offset + 24);
3387 }
3388 /* Insert offset into reloc. table here. */
3389 bfd_put_32 (output_bfd, relplt->output_offset +
3390 iplt_index * RELA_ENTRY_SIZE,
3391 plt->contents + iplt_offset + 28);
3392
3393 /* Fill in the entry in the global offset table.
3394 Points to instruction after GOT offset. */
3395 bfd_put_32 (output_bfd,
3396 (plt->output_section->vma
3397 + plt->output_offset
3398 + iplt_offset
3399 + 12),
3400 gotplt->contents + igotiplt_offset);
3401
3402 /* Fill in the entry in the .rela.plt section. */
3403 rela.r_offset = gotplt->output_section->vma + got_offset;
3404
3405 if (!h
3406 || h->dynindx == -1
3407 || ((bfd_link_executable (info)
3408 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3409 && h->def_regular))
3410 {
3411 /* The symbol can be locally resolved. */
3412 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3413 rela.r_addend = resolver_address;
3414 }
3415 else
3416 {
3417 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3418 rela.r_addend = 0;
3419 }
3420
3421 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3422 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3423 }
3424
3425 /* Finish up dynamic symbol handling. We set the contents of various
3426 dynamic sections here. */
3427
3428 static bfd_boolean
3429 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3430 struct bfd_link_info *info,
3431 struct elf_link_hash_entry *h,
3432 Elf_Internal_Sym *sym)
3433 {
3434 struct elf_s390_link_hash_table *htab;
3435 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3436
3437 htab = elf_s390_hash_table (info);
3438
3439 if (h->plt.offset != (bfd_vma) -1)
3440 {
3441 bfd_vma plt_index;
3442 bfd_vma got_offset;
3443 Elf_Internal_Rela rela;
3444 bfd_byte *loc;
3445 bfd_vma relative_offset;
3446
3447 /* This symbol has an entry in the procedure linkage table. Set
3448 it up. */
3449 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3450 {
3451 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3452 htab, h->plt.offset,
3453 eh->ifunc_resolver_address +
3454 eh->ifunc_resolver_section->output_offset +
3455 eh->ifunc_resolver_section->output_section->vma);
3456 /* Do not return yet. Handling of explicit GOT slots of
3457 IFUNC symbols is below. */
3458 }
3459 else
3460 {
3461 if (h->dynindx == -1
3462 || htab->elf.splt == NULL
3463 || htab->elf.sgotplt == NULL
3464 || htab->elf.srelplt == NULL)
3465 abort ();
3466
3467 /* Calc. index no.
3468 Current offset - size first entry / entry size. */
3469 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3470
3471 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3472 addr & GOT addr. */
3473 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3474
3475 /* S390 uses halfwords for relative branch calc! */
3476 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3477 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3478 /* If offset is > 32768, branch to a previous branch
3479 390 can only handle +-64 K jumps. */
3480 if ( -32768 > (int) relative_offset )
3481 relative_offset
3482 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3483
3484 /* Fill in the entry in the procedure linkage table. */
3485 if (!bfd_link_pic (info))
3486 {
3487 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3488 PLT_ENTRY_SIZE);
3489
3490 /* Adjust jump to the first plt entry. */
3491 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3492 htab->elf.splt->contents + h->plt.offset + 20);
3493
3494 /* Push the GOT offset field. */
3495 bfd_put_32 (output_bfd,
3496 (htab->elf.sgotplt->output_section->vma
3497 + htab->elf.sgotplt->output_offset
3498 + got_offset),
3499 htab->elf.splt->contents + h->plt.offset + 24);
3500 }
3501 else if (got_offset < 4096)
3502 {
3503 /* The GOT offset is small enough to be used directly as
3504 displacement. */
3505 memcpy (htab->elf.splt->contents + h->plt.offset,
3506 elf_s390_plt_pic12_entry,
3507 PLT_ENTRY_SIZE);
3508
3509 /* Put in the GOT offset as displacement value. The 0xc000
3510 value comes from the first word of the plt entry. Look
3511 at the elf_s390_plt_pic12_entry content. */
3512 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3513 htab->elf.splt->contents + h->plt.offset + 2);
3514
3515 /* Adjust the jump to the first plt entry. */
3516 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3517 htab->elf.splt->contents + h->plt.offset + 20);
3518 }
3519 else if (got_offset < 32768)
3520 {
3521 /* The GOT offset is too big for a displacement but small
3522 enough to be a signed 16 bit immediate value as it can be
3523 used in an lhi instruction. */
3524 memcpy (htab->elf.splt->contents + h->plt.offset,
3525 elf_s390_plt_pic16_entry,
3526 PLT_ENTRY_SIZE);
3527
3528 /* Put in the GOT offset for the lhi instruction. */
3529 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3530 htab->elf.splt->contents + h->plt.offset + 2);
3531
3532 /* Adjust the jump to the first plt entry. */
3533 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3534 htab->elf.splt->contents + h->plt.offset + 20);
3535 }
3536 else
3537 {
3538 memcpy (htab->elf.splt->contents + h->plt.offset,
3539 elf_s390_plt_pic_entry,
3540 PLT_ENTRY_SIZE);
3541
3542 /* Adjust the jump to the first plt entry. */
3543 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3544 htab->elf.splt->contents + h->plt.offset + 20);
3545
3546 /* Push the GOT offset field. */
3547 bfd_put_32 (output_bfd, got_offset,
3548 htab->elf.splt->contents + h->plt.offset + 24);
3549 }
3550 /* Insert offset into reloc. table here. */
3551 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3552 htab->elf.splt->contents + h->plt.offset + 28);
3553
3554 /* Fill in the entry in the global offset table.
3555 Points to instruction after GOT offset. */
3556 bfd_put_32 (output_bfd,
3557 (htab->elf.splt->output_section->vma
3558 + htab->elf.splt->output_offset
3559 + h->plt.offset
3560 + 12),
3561 htab->elf.sgotplt->contents + got_offset);
3562
3563 /* Fill in the entry in the .rela.plt section. */
3564 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3565 + htab->elf.sgotplt->output_offset
3566 + got_offset);
3567 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3568 rela.r_addend = 0;
3569 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3570 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3571
3572 if (!h->def_regular)
3573 {
3574 /* Mark the symbol as undefined, rather than as defined in
3575 the .plt section. Leave the value alone. This is a clue
3576 for the dynamic linker, to make function pointer
3577 comparisons work between an application and shared
3578 library. */
3579 sym->st_shndx = SHN_UNDEF;
3580 }
3581 }
3582 }
3583
3584 if (h->got.offset != (bfd_vma) -1
3585 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3586 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3587 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3588 {
3589 Elf_Internal_Rela rela;
3590 bfd_byte *loc;
3591
3592 /* This symbol has an entry in the global offset table. Set it
3593 up. */
3594
3595 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3596 abort ();
3597
3598 rela.r_offset = (htab->elf.sgot->output_section->vma
3599 + htab->elf.sgot->output_offset
3600 + (h->got.offset &~ (bfd_vma) 1));
3601
3602 /* If this is a static link, or it is a -Bsymbolic link and the
3603 symbol is defined locally or was forced to be local because
3604 of a version file, we just want to emit a RELATIVE reloc.
3605 The entry in the global offset table will already have been
3606 initialized in the relocate_section function. */
3607 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3608 {
3609 if (bfd_link_pic (info))
3610 {
3611 /* An explicit GOT slot usage needs GLOB_DAT. If the
3612 symbol references local the implicit got.iplt slot
3613 will be used and the IRELATIVE reloc has been created
3614 above. */
3615 goto do_glob_dat;
3616 }
3617 else
3618 {
3619 /* For non-shared objects explicit GOT slots must be
3620 filled with the PLT slot address for pointer
3621 equality reasons. */
3622 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3623 + htab->elf.iplt->output_offset
3624 + h->plt.offset),
3625 htab->elf.sgot->contents + h->got.offset);
3626 return TRUE;
3627 }
3628 }
3629 else if (bfd_link_pic (info)
3630 && SYMBOL_REFERENCES_LOCAL (info, h))
3631 {
3632 /* If this is a static link, or it is a -Bsymbolic link and
3633 the symbol is defined locally or was forced to be local
3634 because of a version file, we just want to emit a
3635 RELATIVE reloc. The entry in the global offset table
3636 will already have been initialized in the
3637 relocate_section function. */
3638 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3639 return FALSE;
3640 BFD_ASSERT((h->got.offset & 1) != 0);
3641 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3642 rela.r_addend = (h->root.u.def.value
3643 + h->root.u.def.section->output_section->vma
3644 + h->root.u.def.section->output_offset);
3645 }
3646 else
3647 {
3648 BFD_ASSERT((h->got.offset & 1) == 0);
3649 do_glob_dat:
3650 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3651 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3652 rela.r_addend = 0;
3653 }
3654
3655 loc = htab->elf.srelgot->contents;
3656 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3657 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3658 }
3659
3660 if (h->needs_copy)
3661 {
3662 Elf_Internal_Rela rela;
3663 asection *s;
3664 bfd_byte *loc;
3665
3666 /* This symbols needs a copy reloc. Set it up. */
3667
3668 if (h->dynindx == -1
3669 || (h->root.type != bfd_link_hash_defined
3670 && h->root.type != bfd_link_hash_defweak)
3671 || htab->elf.srelbss == NULL
3672 || htab->elf.sreldynrelro == NULL)
3673 abort ();
3674
3675 rela.r_offset = (h->root.u.def.value
3676 + h->root.u.def.section->output_section->vma
3677 + h->root.u.def.section->output_offset);
3678 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3679 rela.r_addend = 0;
3680 if (h->root.u.def.section == htab->elf.sdynrelro)
3681 s = htab->elf.sreldynrelro;
3682 else
3683 s = htab->elf.srelbss;
3684 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3685 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3686 }
3687
3688 /* Mark some specially defined symbols as absolute. */
3689 if (h == htab->elf.hdynamic
3690 || h == htab->elf.hgot
3691 || h == htab->elf.hplt)
3692 sym->st_shndx = SHN_ABS;
3693
3694 return TRUE;
3695 }
3696
3697 /* Used to decide how to sort relocs in an optimal manner for the
3698 dynamic linker, before writing them out. */
3699
3700 static enum elf_reloc_type_class
3701 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3702 const asection *rel_sec ATTRIBUTE_UNUSED,
3703 const Elf_Internal_Rela *rela)
3704 {
3705 bfd *abfd = info->output_bfd;
3706 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3707 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3708 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3709 Elf_Internal_Sym sym;
3710
3711 if (htab->elf.dynsym == NULL
3712 || !bed->s->swap_symbol_in (abfd,
3713 (htab->elf.dynsym->contents
3714 + r_symndx * bed->s->sizeof_sym),
3715 0, &sym))
3716 abort ();
3717
3718 /* Check relocation against STT_GNU_IFUNC symbol. */
3719 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3720 return reloc_class_ifunc;
3721
3722 switch ((int) ELF32_R_TYPE (rela->r_info))
3723 {
3724 case R_390_RELATIVE:
3725 return reloc_class_relative;
3726 case R_390_JMP_SLOT:
3727 return reloc_class_plt;
3728 case R_390_COPY:
3729 return reloc_class_copy;
3730 default:
3731 return reloc_class_normal;
3732 }
3733 }
3734
3735 /* Finish up the dynamic sections. */
3736
3737 static bfd_boolean
3738 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3739 struct bfd_link_info *info)
3740 {
3741 struct elf_s390_link_hash_table *htab;
3742 bfd *dynobj;
3743 asection *sdyn;
3744 bfd *ibfd;
3745 unsigned int i;
3746
3747 htab = elf_s390_hash_table (info);
3748 dynobj = htab->elf.dynobj;
3749 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3750
3751 if (htab->elf.dynamic_sections_created)
3752 {
3753 Elf32_External_Dyn *dyncon, *dynconend;
3754
3755 if (sdyn == NULL || htab->elf.sgot == NULL)
3756 abort ();
3757
3758 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3759 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3760 for (; dyncon < dynconend; dyncon++)
3761 {
3762 Elf_Internal_Dyn dyn;
3763 asection *s;
3764
3765 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3766
3767 switch (dyn.d_tag)
3768 {
3769 default:
3770 continue;
3771
3772 case DT_PLTGOT:
3773 s = htab->elf.sgotplt;
3774 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3775 break;
3776
3777 case DT_JMPREL:
3778 s = htab->elf.srelplt;
3779 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3780 break;
3781
3782 case DT_PLTRELSZ:
3783 dyn.d_un.d_val = htab->elf.srelplt->size;
3784 if (htab->elf.irelplt)
3785 dyn.d_un.d_val += htab->elf.irelplt->size;
3786 break;
3787 }
3788
3789 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3790 }
3791
3792 /* Fill in the special first entry in the procedure linkage table. */
3793 if (htab->elf.splt && htab->elf.splt->size > 0)
3794 {
3795 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3796 if (bfd_link_pic (info))
3797 {
3798 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3799 PLT_FIRST_ENTRY_SIZE);
3800 }
3801 else
3802 {
3803 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3804 PLT_FIRST_ENTRY_SIZE);
3805 bfd_put_32 (output_bfd,
3806 htab->elf.sgotplt->output_section->vma
3807 + htab->elf.sgotplt->output_offset,
3808 htab->elf.splt->contents + 24);
3809 }
3810 elf_section_data (htab->elf.splt->output_section)
3811 ->this_hdr.sh_entsize = 4;
3812 }
3813
3814 }
3815
3816 if (htab->elf.sgotplt)
3817 {
3818 /* Fill in the first three entries in the global offset table. */
3819 if (htab->elf.sgotplt->size > 0)
3820 {
3821 bfd_put_32 (output_bfd,
3822 (sdyn == NULL ? (bfd_vma) 0
3823 : sdyn->output_section->vma + sdyn->output_offset),
3824 htab->elf.sgotplt->contents);
3825 /* One entry for shared object struct ptr. */
3826 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3827 /* One entry for _dl_runtime_resolve. */
3828 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3829 }
3830
3831 elf_section_data (htab->elf.sgotplt->output_section)
3832 ->this_hdr.sh_entsize = 4;
3833 }
3834 /* Finish dynamic symbol for local IFUNC symbols. */
3835 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3836 {
3837 struct plt_entry *local_plt;
3838 Elf_Internal_Sym *isym;
3839 Elf_Internal_Shdr *symtab_hdr;
3840
3841 symtab_hdr = &elf_symtab_hdr (ibfd);
3842
3843 if (!is_s390_elf (ibfd))
3844 continue;
3845
3846 local_plt = elf_s390_local_plt (ibfd);
3847 if (local_plt != NULL)
3848 for (i = 0; i < symtab_hdr->sh_info; i++)
3849 {
3850 if (local_plt[i].plt.offset != (bfd_vma) -1)
3851 {
3852 asection *sec = local_plt[i].sec;
3853 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3854 if (isym == NULL)
3855 return FALSE;
3856
3857 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3858 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3859 local_plt[i].plt.offset,
3860 isym->st_value
3861 + sec->output_section->vma
3862 + sec->output_offset);
3863
3864 }
3865 }
3866 }
3867 return TRUE;
3868 }
3869 \f
3870 /* Support for core dump NOTE sections. */
3871
3872 static bfd_boolean
3873 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3874 {
3875 int offset;
3876 unsigned int size;
3877
3878 switch (note->descsz)
3879 {
3880 default:
3881 return FALSE;
3882
3883 case 224: /* S/390 Linux. */
3884 /* pr_cursig */
3885 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3886
3887 /* pr_pid */
3888 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3889
3890 /* pr_reg */
3891 offset = 72;
3892 size = 144;
3893 break;
3894 }
3895
3896 /* Make a ".reg/999" section. */
3897 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3898 size, note->descpos + offset);
3899 }
3900
3901 static bfd_boolean
3902 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3903 {
3904 switch (note->descsz)
3905 {
3906 default:
3907 return FALSE;
3908
3909 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3910 elf_tdata (abfd)->core->pid
3911 = bfd_get_32 (abfd, note->descdata + 12);
3912 elf_tdata (abfd)->core->program
3913 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3914 elf_tdata (abfd)->core->command
3915 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3916 break;
3917 }
3918
3919 /* Note that for some reason, a spurious space is tacked
3920 onto the end of the args in some (at least one anyway)
3921 implementations, so strip it off if it exists. */
3922
3923 {
3924 char *command = elf_tdata (abfd)->core->command;
3925 int n = strlen (command);
3926
3927 if (0 < n && command[n - 1] == ' ')
3928 command[n - 1] = '\0';
3929 }
3930
3931 return TRUE;
3932 }
3933
3934 static char *
3935 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3936 int note_type, ...)
3937 {
3938 va_list ap;
3939
3940 switch (note_type)
3941 {
3942 default:
3943 return NULL;
3944
3945 case NT_PRPSINFO:
3946 {
3947 char data[124] ATTRIBUTE_NONSTRING = { 0 };
3948 const char *fname, *psargs;
3949
3950 va_start (ap, note_type);
3951 fname = va_arg (ap, const char *);
3952 psargs = va_arg (ap, const char *);
3953 va_end (ap);
3954
3955 strncpy (data + 28, fname, 16);
3956 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3957 DIAGNOSTIC_PUSH;
3958 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3959 -Wstringop-truncation:
3960 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3961 */
3962 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3963 #endif
3964 strncpy (data + 44, psargs, 80);
3965 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3966 DIAGNOSTIC_POP;
3967 #endif
3968 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3969 &data, sizeof (data));
3970 }
3971
3972 case NT_PRSTATUS:
3973 {
3974 char data[224] = { 0 };
3975 long pid;
3976 int cursig;
3977 const void *gregs;
3978
3979 va_start (ap, note_type);
3980 pid = va_arg (ap, long);
3981 cursig = va_arg (ap, int);
3982 gregs = va_arg (ap, const void *);
3983 va_end (ap);
3984
3985 bfd_put_16 (abfd, cursig, data + 12);
3986 bfd_put_32 (abfd, pid, data + 24);
3987 memcpy (data + 72, gregs, 144);
3988 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3989 &data, sizeof (data));
3990 }
3991 }
3992 /* NOTREACHED */
3993 }
3994 \f
3995 /* Return address for Ith PLT stub in section PLT, for relocation REL
3996 or (bfd_vma) -1 if it should not be included. */
3997
3998 static bfd_vma
3999 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4000 const arelent *rel ATTRIBUTE_UNUSED)
4001 {
4002 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4003 }
4004
4005 /* Merge backend specific data from an object file to the output
4006 object file when linking. */
4007
4008 static bfd_boolean
4009 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4010 {
4011 bfd *obfd = info->output_bfd;
4012
4013 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4014 return TRUE;
4015
4016 if (!elf_s390_merge_obj_attributes (ibfd, info))
4017 return FALSE;
4018
4019 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4020 return TRUE;
4021 }
4022
4023
4024 #define TARGET_BIG_SYM s390_elf32_vec
4025 #define TARGET_BIG_NAME "elf32-s390"
4026 #define ELF_ARCH bfd_arch_s390
4027 #define ELF_TARGET_ID S390_ELF_DATA
4028 #define ELF_MACHINE_CODE EM_S390
4029 #define ELF_MACHINE_ALT1 EM_S390_OLD
4030 #define ELF_MAXPAGESIZE 0x1000
4031
4032 #define elf_backend_can_gc_sections 1
4033 #define elf_backend_can_refcount 1
4034 #define elf_backend_want_got_plt 1
4035 #define elf_backend_plt_readonly 1
4036 #define elf_backend_want_plt_sym 0
4037 #define elf_backend_got_header_size 12
4038 #define elf_backend_want_dynrelro 1
4039 #define elf_backend_rela_normal 1
4040
4041 #define elf_info_to_howto elf_s390_info_to_howto
4042
4043 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4044 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4045 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4046 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4047
4048 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4049
4050 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4051 #define elf_backend_check_relocs elf_s390_check_relocs
4052 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4053 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4054 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4055 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4056 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4057 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4058 #define elf_backend_relocate_section elf_s390_relocate_section
4059 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4060 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4061 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4062 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4063 #define elf_backend_write_core_note elf_s390_write_core_note
4064 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4065 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4066
4067 #define bfd_elf32_mkobject elf_s390_mkobject
4068 #define elf_backend_object_p elf_s390_object_p
4069
4070 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4071
4072 #include "elf32-target.h"
GDB Binutils - Deliverables
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