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Add support to GNU ld to separate got related plt entries from normal ones in order...
[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 BFD_ASSERT (h != NULL);
1370 if (h != NULL
1371 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1372 return FALSE;
1373 break;
1374
1375 default:
1376 break;
1377 }
1378 }
1379
1380 return TRUE;
1381 }
1382
1383 /* Return the section that should be marked against GC for a given
1384 relocation. */
1385
1386 static asection *
1387 elf_s390_gc_mark_hook (asection *sec,
1388 struct bfd_link_info *info,
1389 Elf_Internal_Rela *rel,
1390 struct elf_link_hash_entry *h,
1391 Elf_Internal_Sym *sym)
1392 {
1393 if (h != NULL)
1394 switch (ELF32_R_TYPE (rel->r_info))
1395 {
1396 case R_390_GNU_VTINHERIT:
1397 case R_390_GNU_VTENTRY:
1398 return NULL;
1399 }
1400 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1401
1402 }
1403
1404 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1405 entry but we found we will not create any. Called when we find we will
1406 not have any PLT for this symbol, by for example
1407 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1408 or elf_s390_size_dynamic_sections if no dynamic sections will be
1409 created (we're only linking static objects). */
1410
1411 static void
1412 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1413 {
1414 if (h->elf.root.type == bfd_link_hash_warning)
1415 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1416
1417 if (h->gotplt_refcount <= 0)
1418 return;
1419
1420 /* We simply add the number of gotplt references to the number
1421 * of got references for this symbol. */
1422 h->elf.got.refcount += h->gotplt_refcount;
1423 h->gotplt_refcount = -1;
1424 }
1425
1426 /* Find dynamic relocs for H that apply to read-only sections. */
1427
1428 static asection *
1429 readonly_dynrelocs (struct elf_link_hash_entry *h)
1430 {
1431 struct elf_dyn_relocs *p;
1432
1433 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1434 {
1435 asection *s = p->sec->output_section;
1436
1437 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1438 return p->sec;
1439 }
1440 return NULL;
1441 }
1442
1443 /* Adjust a symbol defined by a dynamic object and referenced by a
1444 regular object. The current definition is in some section of the
1445 dynamic object, but we're not including those sections. We have to
1446 change the definition to something the rest of the link can
1447 understand. */
1448
1449 static bfd_boolean
1450 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1451 struct elf_link_hash_entry *h)
1452 {
1453 struct elf_s390_link_hash_table *htab;
1454 asection *s, *srel;
1455
1456 /* STT_GNU_IFUNC symbol must go through PLT. */
1457 if (s390_is_ifunc_symbol_p (h))
1458 {
1459 /* All local STT_GNU_IFUNC references must be treated as local
1460 calls via local PLT. */
1461 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1462 {
1463 bfd_size_type pc_count = 0, count = 0;
1464 struct elf_dyn_relocs **pp;
1465 struct elf_s390_link_hash_entry *eh;
1466 struct elf_dyn_relocs *p;
1467
1468 eh = (struct elf_s390_link_hash_entry *) h;
1469 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1470 {
1471 pc_count += p->pc_count;
1472 p->count -= p->pc_count;
1473 p->pc_count = 0;
1474 count += p->count;
1475 if (p->count == 0)
1476 *pp = p->next;
1477 else
1478 pp = &p->next;
1479 }
1480
1481 if (pc_count || count)
1482 {
1483 h->needs_plt = 1;
1484 h->non_got_ref = 1;
1485 if (h->plt.refcount <= 0)
1486 h->plt.refcount = 1;
1487 else
1488 h->plt.refcount += 1;
1489 }
1490 }
1491
1492 if (h->plt.refcount <= 0)
1493 {
1494 h->plt.offset = (bfd_vma) -1;
1495 h->needs_plt = 0;
1496 }
1497 return TRUE;
1498 }
1499
1500 /* If this is a function, put it in the procedure linkage table. We
1501 will fill in the contents of the procedure linkage table later
1502 (although we could actually do it here). */
1503 if (h->type == STT_FUNC
1504 || h->needs_plt)
1505 {
1506 if (h->plt.refcount <= 0
1507 || SYMBOL_CALLS_LOCAL (info, h)
1508 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1509 && h->root.type != bfd_link_hash_undefweak))
1510 {
1511 /* This case can occur if we saw a PLT32 reloc in an input
1512 file, but the symbol was never referred to by a dynamic
1513 object, or if all references were garbage collected. In
1514 such a case, we don't actually need to build a procedure
1515 linkage table, and we can just do a PC32 reloc instead. */
1516 h->plt.offset = (bfd_vma) -1;
1517 h->needs_plt = 0;
1518 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1519 }
1520
1521 return TRUE;
1522 }
1523 else
1524 /* It's possible that we incorrectly decided a .plt reloc was
1525 needed for an R_390_PC32 reloc to a non-function sym in
1526 check_relocs. We can't decide accurately between function and
1527 non-function syms in check-relocs; Objects loaded later in
1528 the link may change h->type. So fix it now. */
1529 h->plt.offset = (bfd_vma) -1;
1530
1531 /* If this is a weak symbol, and there is a real definition, the
1532 processor independent code will have arranged for us to see the
1533 real definition first, and we can just use the same value. */
1534 if (h->is_weakalias)
1535 {
1536 struct elf_link_hash_entry *def = weakdef (h);
1537 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1538 h->root.u.def.section = def->root.u.def.section;
1539 h->root.u.def.value = def->root.u.def.value;
1540 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1541 h->non_got_ref = def->non_got_ref;
1542 return TRUE;
1543 }
1544
1545 /* This is a reference to a symbol defined by a dynamic object which
1546 is not a function. */
1547
1548 /* If we are creating a shared library, we must presume that the
1549 only references to the symbol are via the global offset table.
1550 For such cases we need not do anything here; the relocations will
1551 be handled correctly by relocate_section. */
1552 if (bfd_link_pic (info))
1553 return TRUE;
1554
1555 /* If there are no references to this symbol that do not use the
1556 GOT, we don't need to generate a copy reloc. */
1557 if (!h->non_got_ref)
1558 return TRUE;
1559
1560 /* If -z nocopyreloc was given, we won't generate them either. */
1561 if (info->nocopyreloc)
1562 {
1563 h->non_got_ref = 0;
1564 return TRUE;
1565 }
1566
1567 /* If we don't find any dynamic relocs in read-only sections, then
1568 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1569 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1570 {
1571 h->non_got_ref = 0;
1572 return TRUE;
1573 }
1574
1575 /* We must allocate the symbol in our .dynbss section, which will
1576 become part of the .bss section of the executable. There will be
1577 an entry for this symbol in the .dynsym section. The dynamic
1578 object will contain position independent code, so all references
1579 from the dynamic object to this symbol will go through the global
1580 offset table. The dynamic linker will use the .dynsym entry to
1581 determine the address it must put in the global offset table, so
1582 both the dynamic object and the regular object will refer to the
1583 same memory location for the variable. */
1584
1585 htab = elf_s390_hash_table (info);
1586
1587 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1588 copy the initial value out of the dynamic object and into the
1589 runtime process image. */
1590 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1591 {
1592 s = htab->elf.sdynrelro;
1593 srel = htab->elf.sreldynrelro;
1594 }
1595 else
1596 {
1597 s = htab->elf.sdynbss;
1598 srel = htab->elf.srelbss;
1599 }
1600 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1601 {
1602 srel->size += sizeof (Elf32_External_Rela);
1603 h->needs_copy = 1;
1604 }
1605
1606 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1607 }
1608
1609 /* Allocate space in .plt, .got and associated reloc sections for
1610 dynamic relocs. */
1611
1612 static bfd_boolean
1613 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1614 {
1615 struct bfd_link_info *info;
1616 struct elf_s390_link_hash_table *htab;
1617 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1618 struct elf_dyn_relocs *p;
1619
1620 if (h->root.type == bfd_link_hash_indirect)
1621 return TRUE;
1622
1623 info = (struct bfd_link_info *) inf;
1624 htab = elf_s390_hash_table (info);
1625
1626 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1627 here if it is defined and referenced in a non-shared object. */
1628 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1629 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1630 else if (htab->elf.dynamic_sections_created
1631 && h->plt.refcount > 0)
1632 {
1633 /* Make sure this symbol is output as a dynamic symbol.
1634 Undefined weak syms won't yet be marked as dynamic. */
1635 if (h->dynindx == -1
1636 && !h->forced_local)
1637 {
1638 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1639 return FALSE;
1640 }
1641
1642 if (bfd_link_pic (info)
1643 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1644 {
1645 asection *s = htab->elf.splt;
1646
1647 /* If this is the first .plt entry, make room for the special
1648 first entry. */
1649 if (s->size == 0)
1650 s->size += PLT_FIRST_ENTRY_SIZE;
1651
1652 h->plt.offset = s->size;
1653
1654 /* If this symbol is not defined in a regular file, and we are
1655 not generating a shared library, then set the symbol to this
1656 location in the .plt. This is required to make function
1657 pointers compare as equal between the normal executable and
1658 the shared library. */
1659 if (! bfd_link_pic (info)
1660 && !h->def_regular)
1661 {
1662 h->root.u.def.section = s;
1663 h->root.u.def.value = h->plt.offset;
1664 }
1665
1666 /* Make room for this entry. */
1667 s->size += PLT_ENTRY_SIZE;
1668
1669 /* We also need to make an entry in the .got.plt section. */
1670 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1671
1672 /* We also need to make an entry in the .rela.plt section. */
1673 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1674 }
1675 else
1676 {
1677 h->plt.offset = (bfd_vma) -1;
1678 h->needs_plt = 0;
1679 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1680 }
1681 }
1682 else
1683 {
1684 h->plt.offset = (bfd_vma) -1;
1685 h->needs_plt = 0;
1686 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1687 }
1688
1689 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1690 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1691 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1692 we can save the dynamic TLS relocation. */
1693 if (h->got.refcount > 0
1694 && !bfd_link_pic (info)
1695 && h->dynindx == -1
1696 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1697 {
1698 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1699 /* For the GOTIE access without a literal pool entry the offset has
1700 to be stored somewhere. The immediate value in the instruction
1701 is not bit enough so the value is stored in the got. */
1702 {
1703 h->got.offset = htab->elf.sgot->size;
1704 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1705 }
1706 else
1707 h->got.offset = (bfd_vma) -1;
1708 }
1709 else if (h->got.refcount > 0)
1710 {
1711 asection *s;
1712 bfd_boolean dyn;
1713 int tls_type = elf_s390_hash_entry(h)->tls_type;
1714
1715 /* Make sure this symbol is output as a dynamic symbol.
1716 Undefined weak syms won't yet be marked as dynamic. */
1717 if (h->dynindx == -1
1718 && !h->forced_local)
1719 {
1720 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1721 return FALSE;
1722 }
1723
1724 s = htab->elf.sgot;
1725 h->got.offset = s->size;
1726 s->size += GOT_ENTRY_SIZE;
1727 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1728 if (tls_type == GOT_TLS_GD)
1729 s->size += GOT_ENTRY_SIZE;
1730 dyn = htab->elf.dynamic_sections_created;
1731 /* R_390_TLS_IE32 needs one dynamic relocation,
1732 R_390_TLS_GD32 needs one if local symbol and two if global. */
1733 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1734 || tls_type >= GOT_TLS_IE)
1735 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1736 else if (tls_type == GOT_TLS_GD)
1737 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1738 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1739 || h->root.type != bfd_link_hash_undefweak)
1740 && (bfd_link_pic (info)
1741 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1742 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1743 }
1744 else
1745 h->got.offset = (bfd_vma) -1;
1746
1747 if (eh->dyn_relocs == NULL)
1748 return TRUE;
1749
1750 /* In the shared -Bsymbolic case, discard space allocated for
1751 dynamic pc-relative relocs against symbols which turn out to be
1752 defined in regular objects. For the normal shared case, discard
1753 space for pc-relative relocs that have become local due to symbol
1754 visibility changes. */
1755
1756 if (bfd_link_pic (info))
1757 {
1758 if (SYMBOL_CALLS_LOCAL (info, h))
1759 {
1760 struct elf_dyn_relocs **pp;
1761
1762 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1763 {
1764 p->count -= p->pc_count;
1765 p->pc_count = 0;
1766 if (p->count == 0)
1767 *pp = p->next;
1768 else
1769 pp = &p->next;
1770 }
1771 }
1772
1773 /* Also discard relocs on undefined weak syms with non-default
1774 visibility. */
1775 if (eh->dyn_relocs != NULL
1776 && h->root.type == bfd_link_hash_undefweak)
1777 {
1778 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1779 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1780 eh->dyn_relocs = NULL;
1781
1782 /* Make sure undefined weak symbols are output as a dynamic
1783 symbol in PIEs. */
1784 else if (h->dynindx == -1
1785 && !h->forced_local)
1786 {
1787 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1788 return FALSE;
1789 }
1790 }
1791 }
1792 else if (ELIMINATE_COPY_RELOCS)
1793 {
1794 /* For the non-shared case, discard space for relocs against
1795 symbols which turn out to need copy relocs or are not
1796 dynamic. */
1797
1798 if (!h->non_got_ref
1799 && ((h->def_dynamic
1800 && !h->def_regular)
1801 || (htab->elf.dynamic_sections_created
1802 && (h->root.type == bfd_link_hash_undefweak
1803 || h->root.type == bfd_link_hash_undefined))))
1804 {
1805 /* Make sure this symbol is output as a dynamic symbol.
1806 Undefined weak syms won't yet be marked as dynamic. */
1807 if (h->dynindx == -1
1808 && !h->forced_local)
1809 {
1810 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1811 return FALSE;
1812 }
1813
1814 /* If that succeeded, we know we'll be keeping all the
1815 relocs. */
1816 if (h->dynindx != -1)
1817 goto keep;
1818 }
1819
1820 eh->dyn_relocs = NULL;
1821
1822 keep: ;
1823 }
1824
1825 /* Finally, allocate space. */
1826 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1827 {
1828 asection *sreloc = elf_section_data (p->sec)->sreloc;
1829
1830 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1831 }
1832
1833 return TRUE;
1834 }
1835
1836 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1837 read-only sections. */
1838
1839 static bfd_boolean
1840 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1841 {
1842 asection *sec;
1843
1844 if (h->root.type == bfd_link_hash_indirect)
1845 return TRUE;
1846
1847 sec = readonly_dynrelocs (h);
1848 if (sec != NULL)
1849 {
1850 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1851
1852 info->flags |= DF_TEXTREL;
1853 info->callbacks->minfo
1854 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1855 sec->owner, h->root.root.string, sec);
1856
1857 /* Not an error, just cut short the traversal. */
1858 return FALSE;
1859 }
1860 return TRUE;
1861 }
1862
1863 /* Set the sizes of the dynamic sections. */
1864
1865 static bfd_boolean
1866 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1867 struct bfd_link_info *info)
1868 {
1869 struct elf_s390_link_hash_table *htab;
1870 bfd *dynobj;
1871 asection *s;
1872 bfd_boolean relocs;
1873 bfd *ibfd;
1874
1875 htab = elf_s390_hash_table (info);
1876 dynobj = htab->elf.dynobj;
1877 if (dynobj == NULL)
1878 abort ();
1879
1880 if (htab->elf.dynamic_sections_created)
1881 {
1882 /* Set the contents of the .interp section to the interpreter. */
1883 if (bfd_link_executable (info) && !info->nointerp)
1884 {
1885 s = bfd_get_linker_section (dynobj, ".interp");
1886 if (s == NULL)
1887 abort ();
1888 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1889 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1890 }
1891 }
1892
1893 /* Set up .got offsets for local syms, and space for local dynamic
1894 relocs. */
1895 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1896 {
1897 bfd_signed_vma *local_got;
1898 bfd_signed_vma *end_local_got;
1899 char *local_tls_type;
1900 bfd_size_type locsymcount;
1901 Elf_Internal_Shdr *symtab_hdr;
1902 asection *srela;
1903 struct plt_entry *local_plt;
1904 unsigned int i;
1905
1906 if (! is_s390_elf (ibfd))
1907 continue;
1908
1909 for (s = ibfd->sections; s != NULL; s = s->next)
1910 {
1911 struct elf_dyn_relocs *p;
1912
1913 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1914 {
1915 if (!bfd_is_abs_section (p->sec)
1916 && bfd_is_abs_section (p->sec->output_section))
1917 {
1918 /* Input section has been discarded, either because
1919 it is a copy of a linkonce section or due to
1920 linker script /DISCARD/, so we'll be discarding
1921 the relocs too. */
1922 }
1923 else if (p->count != 0)
1924 {
1925 srela = elf_section_data (p->sec)->sreloc;
1926 srela->size += p->count * sizeof (Elf32_External_Rela);
1927 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1928 info->flags |= DF_TEXTREL;
1929 }
1930 }
1931 }
1932
1933 local_got = elf_local_got_refcounts (ibfd);
1934 if (!local_got)
1935 continue;
1936
1937 symtab_hdr = &elf_symtab_hdr (ibfd);
1938 locsymcount = symtab_hdr->sh_info;
1939 end_local_got = local_got + locsymcount;
1940 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1941 s = htab->elf.sgot;
1942 srela = htab->elf.srelgot;
1943 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1944 {
1945 if (*local_got > 0)
1946 {
1947 *local_got = s->size;
1948 s->size += GOT_ENTRY_SIZE;
1949 if (*local_tls_type == GOT_TLS_GD)
1950 s->size += GOT_ENTRY_SIZE;
1951 if (bfd_link_pic (info))
1952 srela->size += sizeof (Elf32_External_Rela);
1953 }
1954 else
1955 *local_got = (bfd_vma) -1;
1956 }
1957 local_plt = elf_s390_local_plt (ibfd);
1958 for (i = 0; i < symtab_hdr->sh_info; i++)
1959 {
1960 if (local_plt[i].plt.refcount > 0)
1961 {
1962 local_plt[i].plt.offset = htab->elf.iplt->size;
1963 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1964 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1965 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1966 }
1967 else
1968 local_plt[i].plt.offset = (bfd_vma) -1;
1969 }
1970 }
1971
1972 if (htab->tls_ldm_got.refcount > 0)
1973 {
1974 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1975 relocs. */
1976 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1977 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1978 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1979 }
1980 else
1981 htab->tls_ldm_got.offset = -1;
1982
1983 /* Allocate global sym .plt and .got entries, and space for global
1984 sym dynamic relocs. */
1985 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1986
1987 /* We now have determined the sizes of the various dynamic sections.
1988 Allocate memory for them. */
1989 relocs = FALSE;
1990 for (s = dynobj->sections; s != NULL; s = s->next)
1991 {
1992 if ((s->flags & SEC_LINKER_CREATED) == 0)
1993 continue;
1994
1995 if (s == htab->elf.splt
1996 || s == htab->elf.sgot
1997 || s == htab->elf.sgotplt
1998 || s == htab->elf.sdynbss
1999 || s == htab->elf.sdynrelro
2000 || s == htab->elf.iplt
2001 || s == htab->elf.igotplt
2002 || s == htab->irelifunc)
2003 {
2004 /* Strip this section if we don't need it; see the
2005 comment below. */
2006 }
2007 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2008 {
2009 if (s->size != 0)
2010 relocs = TRUE;
2011
2012 /* We use the reloc_count field as a counter if we need
2013 to copy relocs into the output file. */
2014 s->reloc_count = 0;
2015 }
2016 else
2017 {
2018 /* It's not one of our sections, so don't allocate space. */
2019 continue;
2020 }
2021
2022 if (s->size == 0)
2023 {
2024 /* If we don't need this section, strip it from the
2025 output file. This is to handle .rela.bss and
2026 .rela.plt. We must create it in
2027 create_dynamic_sections, because it must be created
2028 before the linker maps input sections to output
2029 sections. The linker does that before
2030 adjust_dynamic_symbol is called, and it is that
2031 function which decides whether anything needs to go
2032 into these sections. */
2033
2034 s->flags |= SEC_EXCLUDE;
2035 continue;
2036 }
2037
2038 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2039 continue;
2040
2041 /* Allocate memory for the section contents. We use bfd_zalloc
2042 here in case unused entries are not reclaimed before the
2043 section's contents are written out. This should not happen,
2044 but this way if it does, we get a R_390_NONE reloc instead
2045 of garbage. */
2046 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2047 if (s->contents == NULL)
2048 return FALSE;
2049 }
2050
2051 if (htab->elf.dynamic_sections_created)
2052 {
2053 /* Add some entries to the .dynamic section. We fill in the
2054 values later, in elf_s390_finish_dynamic_sections, but we
2055 must add the entries now so that we get the correct size for
2056 the .dynamic section. The DT_DEBUG entry is filled in by the
2057 dynamic linker and used by the debugger. */
2058 #define add_dynamic_entry(TAG, VAL) \
2059 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2060
2061 if (bfd_link_executable (info))
2062 {
2063 if (!add_dynamic_entry (DT_DEBUG, 0))
2064 return FALSE;
2065 }
2066
2067 if (htab->elf.splt->size != 0)
2068 {
2069 if (!add_dynamic_entry (DT_PLTGOT, 0)
2070 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2071 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2072 || !add_dynamic_entry (DT_JMPREL, 0))
2073 return FALSE;
2074 }
2075
2076 if (relocs)
2077 {
2078 if (!add_dynamic_entry (DT_RELA, 0)
2079 || !add_dynamic_entry (DT_RELASZ, 0)
2080 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2081 return FALSE;
2082
2083 /* If any dynamic relocs apply to a read-only section,
2084 then we need a DT_TEXTREL entry. */
2085 if ((info->flags & DF_TEXTREL) == 0)
2086 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2087
2088 if ((info->flags & DF_TEXTREL) != 0)
2089 {
2090 if (!add_dynamic_entry (DT_TEXTREL, 0))
2091 return FALSE;
2092 }
2093 }
2094 }
2095 #undef add_dynamic_entry
2096
2097 return TRUE;
2098 }
2099
2100 /* Return the base VMA address which should be subtracted from real addresses
2101 when resolving @dtpoff relocation.
2102 This is PT_TLS segment p_vaddr. */
2103
2104 static bfd_vma
2105 dtpoff_base (struct bfd_link_info *info)
2106 {
2107 /* If tls_sec is NULL, we should have signalled an error already. */
2108 if (elf_hash_table (info)->tls_sec == NULL)
2109 return 0;
2110 return elf_hash_table (info)->tls_sec->vma;
2111 }
2112
2113 /* Return the relocation value for @tpoff relocation
2114 if STT_TLS virtual address is ADDRESS. */
2115
2116 static bfd_vma
2117 tpoff (struct bfd_link_info *info, bfd_vma address)
2118 {
2119 struct elf_link_hash_table *htab = elf_hash_table (info);
2120
2121 /* If tls_sec is NULL, we should have signalled an error already. */
2122 if (htab->tls_sec == NULL)
2123 return 0;
2124 return htab->tls_size + htab->tls_sec->vma - address;
2125 }
2126
2127 /* Complain if TLS instruction relocation is against an invalid
2128 instruction. */
2129
2130 static void
2131 invalid_tls_insn (bfd *input_bfd,
2132 asection *input_section,
2133 Elf_Internal_Rela *rel)
2134 {
2135 reloc_howto_type *howto;
2136
2137 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2138 _bfd_error_handler
2139 /* xgettext:c-format */
2140 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2141 input_bfd,
2142 input_section,
2143 (uint64_t) rel->r_offset,
2144 howto->name);
2145 bfd_set_error (bfd_error_bad_value);
2146 }
2147
2148 /* Relocate a 390 ELF section. */
2149
2150 static bfd_boolean
2151 elf_s390_relocate_section (bfd *output_bfd,
2152 struct bfd_link_info *info,
2153 bfd *input_bfd,
2154 asection *input_section,
2155 bfd_byte *contents,
2156 Elf_Internal_Rela *relocs,
2157 Elf_Internal_Sym *local_syms,
2158 asection **local_sections)
2159 {
2160 struct elf_s390_link_hash_table *htab;
2161 Elf_Internal_Shdr *symtab_hdr;
2162 struct elf_link_hash_entry **sym_hashes;
2163 bfd_vma *local_got_offsets;
2164 Elf_Internal_Rela *rel;
2165 Elf_Internal_Rela *relend;
2166
2167 if (!is_s390_elf (input_bfd))
2168 {
2169 bfd_set_error (bfd_error_wrong_format);
2170 return FALSE;
2171 }
2172
2173 htab = elf_s390_hash_table (info);
2174 symtab_hdr = &elf_symtab_hdr (input_bfd);
2175 sym_hashes = elf_sym_hashes (input_bfd);
2176 local_got_offsets = elf_local_got_offsets (input_bfd);
2177
2178 rel = relocs;
2179 relend = relocs + input_section->reloc_count;
2180 for (; rel < relend; rel++)
2181 {
2182 unsigned int r_type;
2183 reloc_howto_type *howto;
2184 unsigned long r_symndx;
2185 struct elf_link_hash_entry *h;
2186 Elf_Internal_Sym *sym;
2187 asection *sec;
2188 bfd_vma off;
2189 bfd_vma relocation;
2190 bfd_boolean unresolved_reloc;
2191 bfd_reloc_status_type r;
2192 int tls_type;
2193 asection *base_got = htab->elf.sgot;
2194 bfd_boolean resolved_to_zero;
2195
2196 r_type = ELF32_R_TYPE (rel->r_info);
2197 if (r_type == (int) R_390_GNU_VTINHERIT
2198 || r_type == (int) R_390_GNU_VTENTRY)
2199 continue;
2200 if (r_type >= (int) R_390_max)
2201 {
2202 bfd_set_error (bfd_error_bad_value);
2203 return FALSE;
2204 }
2205
2206 howto = elf_howto_table + r_type;
2207 r_symndx = ELF32_R_SYM (rel->r_info);
2208
2209 h = NULL;
2210 sym = NULL;
2211 sec = NULL;
2212 unresolved_reloc = FALSE;
2213 if (r_symndx < symtab_hdr->sh_info)
2214 {
2215 sym = local_syms + r_symndx;
2216 sec = local_sections[r_symndx];
2217 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2218 {
2219 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2220 if (local_plt == NULL)
2221 return FALSE;
2222
2223 /* Address of the PLT slot. */
2224 relocation = (htab->elf.iplt->output_section->vma
2225 + htab->elf.iplt->output_offset
2226 + local_plt[r_symndx].plt.offset);
2227
2228 switch (r_type)
2229 {
2230 case R_390_PLTOFF16:
2231 case R_390_PLTOFF32:
2232 relocation -= htab->elf.sgot->output_section->vma;
2233 break;
2234 case R_390_GOTPLT12:
2235 case R_390_GOTPLT16:
2236 case R_390_GOTPLT20:
2237 case R_390_GOTPLT32:
2238 case R_390_GOTPLTENT:
2239 case R_390_GOT12:
2240 case R_390_GOT16:
2241 case R_390_GOT20:
2242 case R_390_GOT32:
2243 case R_390_GOTENT:
2244 {
2245 /* Write the PLT slot address into the GOT slot. */
2246 bfd_put_32 (output_bfd, relocation,
2247 htab->elf.sgot->contents +
2248 local_got_offsets[r_symndx]);
2249 relocation = (local_got_offsets[r_symndx] +
2250 htab->elf.sgot->output_offset);
2251
2252 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2253 relocation += htab->elf.sgot->output_section->vma;
2254 break;
2255 }
2256 default:
2257 break;
2258 }
2259 /* The output section is needed later in
2260 finish_dynamic_section when creating the dynamic
2261 relocation. */
2262 local_plt[r_symndx].sec = sec;
2263 goto do_relocation;
2264 }
2265 else
2266 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2267 }
2268 else
2269 {
2270 bfd_boolean warned ATTRIBUTE_UNUSED;
2271 bfd_boolean ignored ATTRIBUTE_UNUSED;
2272
2273 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2274 r_symndx, symtab_hdr, sym_hashes,
2275 h, sec, relocation,
2276 unresolved_reloc, warned, ignored);
2277 }
2278
2279 if (sec != NULL && discarded_section (sec))
2280 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2281 rel, 1, relend, howto, 0, contents);
2282
2283 if (bfd_link_relocatable (info))
2284 continue;
2285
2286 resolved_to_zero = (h != NULL
2287 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2288
2289 switch (r_type)
2290 {
2291 case R_390_GOTPLT12:
2292 case R_390_GOTPLT16:
2293 case R_390_GOTPLT20:
2294 case R_390_GOTPLT32:
2295 case R_390_GOTPLTENT:
2296 /* There are three cases for a GOTPLT relocation. 1) The
2297 relocation is against the jump slot entry of a plt that
2298 will get emitted to the output file. 2) The relocation
2299 is against the jump slot of a plt entry that has been
2300 removed. elf_s390_adjust_gotplt has created a GOT entry
2301 as replacement. 3) The relocation is against a local symbol.
2302 Cases 2) and 3) are the same as the GOT relocation code
2303 so we just have to test for case 1 and fall through for
2304 the other two. */
2305 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2306 {
2307 bfd_vma plt_index;
2308
2309 if (s390_is_ifunc_symbol_p (h))
2310 {
2311 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2312 relocation = (plt_index * GOT_ENTRY_SIZE +
2313 htab->elf.igotplt->output_offset);
2314 if (r_type == R_390_GOTPLTENT)
2315 relocation += htab->elf.igotplt->output_section->vma;
2316 }
2317 else
2318 {
2319 /* Calc. index no.
2320 Current offset - size first entry / entry size. */
2321 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2322 PLT_ENTRY_SIZE;
2323
2324 /* Offset in GOT is PLT index plus GOT headers(3)
2325 times 4, addr & GOT addr. */
2326 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2327 if (r_type == R_390_GOTPLTENT)
2328 relocation += htab->elf.sgot->output_section->vma;
2329 }
2330 unresolved_reloc = FALSE;
2331
2332 }
2333 /* Fall through. */
2334
2335 case R_390_GOT12:
2336 case R_390_GOT16:
2337 case R_390_GOT20:
2338 case R_390_GOT32:
2339 case R_390_GOTENT:
2340 /* Relocation is to the entry for this symbol in the global
2341 offset table. */
2342 if (base_got == NULL)
2343 abort ();
2344
2345 if (h != NULL)
2346 {
2347 bfd_boolean dyn;
2348
2349 off = h->got.offset;
2350 dyn = htab->elf.dynamic_sections_created;
2351
2352 if (s390_is_ifunc_symbol_p (h))
2353 {
2354 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2355 if (off == (bfd_vma)-1)
2356 {
2357 /* No explicit GOT usage so redirect to the
2358 got.iplt slot. */
2359 base_got = htab->elf.igotplt;
2360 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2361 }
2362 else
2363 {
2364 /* Explicit GOT slots must contain the address
2365 of the PLT slot. This will be handled in
2366 finish_dynamic_symbol. */
2367 }
2368 }
2369 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2370 bfd_link_pic (info),
2371 h)
2372 || (bfd_link_pic (info)
2373 && SYMBOL_REFERENCES_LOCAL (info, h))
2374 || (ELF_ST_VISIBILITY (h->other)
2375 && h->root.type == bfd_link_hash_undefweak))
2376
2377 {
2378 /* This is actually a static link, or it is a
2379 -Bsymbolic link and the symbol is defined
2380 locally, or the symbol was forced to be local
2381 because of a version file. We must initialize
2382 this entry in the global offset table. Since the
2383 offset must always be a multiple of 2, we use the
2384 least significant bit to record whether we have
2385 initialized it already.
2386
2387 When doing a dynamic link, we create a .rel.got
2388 relocation entry to initialize the value. This
2389 is done in the finish_dynamic_symbol routine. */
2390 if ((off & 1) != 0)
2391 off &= ~1;
2392 else
2393 {
2394 bfd_put_32 (output_bfd, relocation,
2395 base_got->contents + off);
2396 h->got.offset |= 1;
2397 }
2398
2399 if ((h->def_regular
2400 && bfd_link_pic (info)
2401 && SYMBOL_REFERENCES_LOCAL (info, h))
2402 /* lrl rx,sym@GOTENT -> larl rx, sym */
2403 && ((r_type == R_390_GOTENT
2404 && (bfd_get_16 (input_bfd,
2405 contents + rel->r_offset - 2)
2406 & 0xff0f) == 0xc40d)
2407 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2408 || (r_type == R_390_GOT20
2409 && (bfd_get_32 (input_bfd,
2410 contents + rel->r_offset - 2)
2411 & 0xff00f000) == 0xe300c000
2412 && bfd_get_8 (input_bfd,
2413 contents + rel->r_offset + 3) == 0x58)))
2414 {
2415 unsigned short new_insn =
2416 (0xc000 | (bfd_get_8 (input_bfd,
2417 contents + rel->r_offset - 1) & 0xf0));
2418 bfd_put_16 (output_bfd, new_insn,
2419 contents + rel->r_offset - 2);
2420 r_type = R_390_PC32DBL;
2421 rel->r_addend = 2;
2422 howto = elf_howto_table + r_type;
2423 relocation = h->root.u.def.value
2424 + h->root.u.def.section->output_section->vma
2425 + h->root.u.def.section->output_offset;
2426 goto do_relocation;
2427 }
2428 }
2429 else
2430 unresolved_reloc = FALSE;
2431 }
2432 else
2433 {
2434 if (local_got_offsets == NULL)
2435 abort ();
2436
2437 off = local_got_offsets[r_symndx];
2438
2439 /* The offset must always be a multiple of 4. We use
2440 the least significant bit to record whether we have
2441 already generated the necessary reloc. */
2442 if ((off & 1) != 0)
2443 off &= ~1;
2444 else
2445 {
2446 bfd_put_32 (output_bfd, relocation,
2447 htab->elf.sgot->contents + off);
2448
2449 if (bfd_link_pic (info))
2450 {
2451 asection *srelgot;
2452 Elf_Internal_Rela outrel;
2453 bfd_byte *loc;
2454
2455 srelgot = htab->elf.srelgot;
2456 if (srelgot == NULL)
2457 abort ();
2458
2459 outrel.r_offset = (htab->elf.sgot->output_section->vma
2460 + htab->elf.sgot->output_offset
2461 + off);
2462 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2463 outrel.r_addend = relocation;
2464 loc = srelgot->contents;
2465 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2466 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2467 }
2468
2469 local_got_offsets[r_symndx] |= 1;
2470 }
2471 }
2472
2473 if (off >= (bfd_vma) -2)
2474 abort ();
2475
2476 relocation = base_got->output_offset + off;
2477
2478 /* For @GOTENT the relocation is against the offset between
2479 the instruction and the symbols entry in the GOT and not
2480 between the start of the GOT and the symbols entry. We
2481 add the vma of the GOT to get the correct value. */
2482 if ( r_type == R_390_GOTENT
2483 || r_type == R_390_GOTPLTENT)
2484 relocation += base_got->output_section->vma;
2485
2486 break;
2487
2488 case R_390_GOTOFF16:
2489 case R_390_GOTOFF32:
2490 /* Relocation is relative to the start of the global offset
2491 table. */
2492
2493 if (h != NULL
2494 && s390_is_ifunc_symbol_p (h)
2495 && h->def_regular
2496 && !bfd_link_executable (info))
2497 {
2498 relocation = (htab->elf.iplt->output_section->vma
2499 + htab->elf.iplt->output_offset
2500 + h->plt.offset
2501 - htab->elf.sgot->output_section->vma);
2502 goto do_relocation;
2503 }
2504
2505 /* Note that sgot->output_offset is not involved in this
2506 calculation. We always want the start of .got. If we
2507 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2508 permitted by the ABI, we might have to change this
2509 calculation. */
2510 relocation -= htab->elf.sgot->output_section->vma;
2511 break;
2512
2513 case R_390_GOTPC:
2514 case R_390_GOTPCDBL:
2515 /* Use global offset table as symbol value. */
2516 relocation = htab->elf.sgot->output_section->vma;
2517 unresolved_reloc = FALSE;
2518 break;
2519
2520 case R_390_PLT12DBL:
2521 case R_390_PLT16DBL:
2522 case R_390_PLT24DBL:
2523 case R_390_PLT32DBL:
2524 case R_390_PLT32:
2525 /* Relocation is to the entry for this symbol in the
2526 procedure linkage table. */
2527
2528 /* Resolve a PLT32 reloc against a local symbol directly,
2529 without using the procedure linkage table. */
2530 if (h == NULL)
2531 break;
2532
2533 if (h->plt.offset == (bfd_vma) -1
2534 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2535 {
2536 /* We didn't make a PLT entry for this symbol. This
2537 happens when statically linking PIC code, or when
2538 using -Bsymbolic. */
2539 break;
2540 }
2541
2542 if (s390_is_ifunc_symbol_p (h))
2543 relocation = (htab->elf.iplt->output_section->vma
2544 + htab->elf.iplt->output_offset
2545 + h->plt.offset);
2546 else
2547 relocation = (htab->elf.splt->output_section->vma
2548 + htab->elf.splt->output_offset
2549 + h->plt.offset);
2550 unresolved_reloc = FALSE;
2551 break;
2552
2553 case R_390_PLTOFF16:
2554 case R_390_PLTOFF32:
2555 /* Relocation is to the entry for this symbol in the
2556 procedure linkage table relative to the start of the GOT. */
2557
2558 /* For local symbols or if we didn't make a PLT entry for
2559 this symbol resolve the symbol directly. */
2560 if (h == NULL
2561 || h->plt.offset == (bfd_vma) -1
2562 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2563 {
2564 relocation -= htab->elf.sgot->output_section->vma;
2565 break;
2566 }
2567
2568 if (s390_is_ifunc_symbol_p (h))
2569 relocation = (htab->elf.iplt->output_section->vma
2570 + htab->elf.iplt->output_offset
2571 + h->plt.offset
2572 - htab->elf.sgot->output_section->vma);
2573 else
2574 relocation = (htab->elf.splt->output_section->vma
2575 + htab->elf.splt->output_offset
2576 + h->plt.offset
2577 - htab->elf.sgot->output_section->vma);
2578 unresolved_reloc = FALSE;
2579 break;
2580
2581 case R_390_PC16:
2582 case R_390_PC12DBL:
2583 case R_390_PC16DBL:
2584 case R_390_PC24DBL:
2585 case R_390_PC32DBL:
2586 case R_390_PC32:
2587 if (h != NULL
2588 && s390_is_ifunc_symbol_p (h)
2589 && h->def_regular
2590 && !bfd_link_executable (info))
2591 {
2592 /* This will not work our if the function does not
2593 happen to set up the GOT pointer for some other
2594 reason. 31 bit PLT entries require r12 to hold the
2595 GOT pointer.
2596 FIXME: Implement an errorcheck.
2597 NOTE: It will work when brasl is not available
2598 (e.g. with -m31 -march=g5) since a local function
2599 call then does use GOTOFF which implies r12 being set
2600 up. */
2601 relocation = (htab->elf.iplt->output_section->vma
2602 + htab->elf.iplt->output_offset
2603 + h ->plt.offset);
2604 goto do_relocation;
2605 }
2606 /* Fall through. */
2607
2608 case R_390_8:
2609 case R_390_16:
2610 case R_390_32:
2611 if ((input_section->flags & SEC_ALLOC) == 0)
2612 break;
2613
2614 if (h != NULL
2615 && s390_is_ifunc_symbol_p (h)
2616 && h->def_regular)
2617 {
2618 if (!bfd_link_pic (info))
2619 {
2620 /* For a non-shared object STT_GNU_IFUNC symbol must
2621 go through PLT. */
2622 relocation = (htab->elf.iplt->output_section->vma
2623 + htab->elf.iplt->output_offset
2624 + h ->plt.offset);
2625 goto do_relocation;
2626 }
2627 else
2628 {
2629 /* For shared objects a runtime relocation is needed. */
2630
2631 Elf_Internal_Rela outrel;
2632 asection *sreloc;
2633
2634 /* Need a dynamic relocation to get the real function
2635 address. */
2636 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2637 info,
2638 input_section,
2639 rel->r_offset);
2640 if (outrel.r_offset == (bfd_vma) -1
2641 || outrel.r_offset == (bfd_vma) -2)
2642 abort ();
2643
2644 outrel.r_offset += (input_section->output_section->vma
2645 + input_section->output_offset);
2646
2647 if (h->dynindx == -1
2648 || h->forced_local
2649 || bfd_link_executable (info))
2650 {
2651 /* This symbol is resolved locally. */
2652 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2653 outrel.r_addend = (h->root.u.def.value
2654 + h->root.u.def.section->output_section->vma
2655 + h->root.u.def.section->output_offset);
2656 }
2657 else
2658 {
2659 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2660 outrel.r_addend = 0;
2661 }
2662
2663 sreloc = htab->elf.irelifunc;
2664 elf_append_rela (output_bfd, sreloc, &outrel);
2665
2666 /* If this reloc is against an external symbol, we
2667 do not want to fiddle with the addend. Otherwise,
2668 we need to include the symbol value so that it
2669 becomes an addend for the dynamic reloc. For an
2670 internal symbol, we have updated addend. */
2671 continue;
2672 }
2673 }
2674
2675 if ((bfd_link_pic (info)
2676 && (h == NULL
2677 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2678 && !resolved_to_zero)
2679 || h->root.type != bfd_link_hash_undefweak)
2680 && ((r_type != R_390_PC16
2681 && r_type != R_390_PC12DBL
2682 && r_type != R_390_PC16DBL
2683 && r_type != R_390_PC24DBL
2684 && r_type != R_390_PC32DBL
2685 && r_type != R_390_PC32)
2686 || !SYMBOL_CALLS_LOCAL (info, h)))
2687 || (ELIMINATE_COPY_RELOCS
2688 && !bfd_link_pic (info)
2689 && h != NULL
2690 && h->dynindx != -1
2691 && !h->non_got_ref
2692 && ((h->def_dynamic
2693 && !h->def_regular)
2694 || h->root.type == bfd_link_hash_undefweak
2695 || h->root.type == bfd_link_hash_undefined)))
2696 {
2697 Elf_Internal_Rela outrel;
2698 bfd_boolean skip, relocate;
2699 asection *sreloc;
2700 bfd_byte *loc;
2701
2702 /* When generating a shared object, these relocations
2703 are copied into the output file to be resolved at run
2704 time. */
2705
2706 skip = FALSE;
2707 relocate = FALSE;
2708
2709 outrel.r_offset =
2710 _bfd_elf_section_offset (output_bfd, info, input_section,
2711 rel->r_offset);
2712 if (outrel.r_offset == (bfd_vma) -1)
2713 skip = TRUE;
2714 else if (outrel.r_offset == (bfd_vma) -2)
2715 skip = TRUE, relocate = TRUE;
2716 outrel.r_offset += (input_section->output_section->vma
2717 + input_section->output_offset);
2718
2719 if (skip)
2720 memset (&outrel, 0, sizeof outrel);
2721 else if (h != NULL
2722 && h->dynindx != -1
2723 && (r_type == R_390_PC16
2724 || r_type == R_390_PC12DBL
2725 || r_type == R_390_PC16DBL
2726 || r_type == R_390_PC24DBL
2727 || r_type == R_390_PC32DBL
2728 || r_type == R_390_PC32
2729 || !bfd_link_pic (info)
2730 || !SYMBOLIC_BIND (info, h)
2731 || !h->def_regular))
2732 {
2733 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2734 outrel.r_addend = rel->r_addend;
2735 }
2736 else
2737 {
2738 /* This symbol is local, or marked to become local. */
2739 outrel.r_addend = relocation + rel->r_addend;
2740 if (r_type == R_390_32)
2741 {
2742 relocate = TRUE;
2743 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2744 }
2745 else
2746 {
2747 long sindx;
2748
2749 if (bfd_is_abs_section (sec))
2750 sindx = 0;
2751 else if (sec == NULL || sec->owner == NULL)
2752 {
2753 bfd_set_error(bfd_error_bad_value);
2754 return FALSE;
2755 }
2756 else
2757 {
2758 asection *osec;
2759
2760 osec = sec->output_section;
2761 sindx = elf_section_data (osec)->dynindx;
2762 if (sindx == 0)
2763 {
2764 osec = htab->elf.text_index_section;
2765 sindx = elf_section_data (osec)->dynindx;
2766 }
2767 BFD_ASSERT (sindx != 0);
2768
2769 /* We are turning this relocation into one
2770 against a section symbol, so subtract out
2771 the output section's address but not the
2772 offset of the input section in the output
2773 section. */
2774 outrel.r_addend -= osec->vma;
2775 }
2776 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2777 }
2778 }
2779
2780 sreloc = elf_section_data (input_section)->sreloc;
2781 if (sreloc == NULL)
2782 abort ();
2783
2784 loc = sreloc->contents;
2785 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2786 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2787
2788 /* If this reloc is against an external symbol, we do
2789 not want to fiddle with the addend. Otherwise, we
2790 need to include the symbol value so that it becomes
2791 an addend for the dynamic reloc. */
2792 if (! relocate)
2793 continue;
2794 }
2795 break;
2796
2797 /* Relocations for tls literal pool entries. */
2798 case R_390_TLS_IE32:
2799 if (bfd_link_pic (info))
2800 {
2801 Elf_Internal_Rela outrel;
2802 asection *sreloc;
2803 bfd_byte *loc;
2804
2805 outrel.r_offset = rel->r_offset
2806 + input_section->output_section->vma
2807 + input_section->output_offset;
2808 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2809 sreloc = elf_section_data (input_section)->sreloc;
2810 if (sreloc == NULL)
2811 abort ();
2812 loc = sreloc->contents;
2813 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2814 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2815 }
2816 /* Fall through. */
2817
2818 case R_390_TLS_GD32:
2819 case R_390_TLS_GOTIE32:
2820 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2821 tls_type = GOT_UNKNOWN;
2822 if (h == NULL && local_got_offsets)
2823 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2824 else if (h != NULL)
2825 {
2826 tls_type = elf_s390_hash_entry(h)->tls_type;
2827 if (!bfd_link_pic (info)
2828 && h->dynindx == -1
2829 && tls_type >= GOT_TLS_IE)
2830 r_type = R_390_TLS_LE32;
2831 }
2832 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2833 r_type = R_390_TLS_IE32;
2834
2835 if (r_type == R_390_TLS_LE32)
2836 {
2837 /* This relocation gets optimized away by the local exec
2838 access optimization. */
2839 BFD_ASSERT (! unresolved_reloc);
2840 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2841 contents + rel->r_offset);
2842 continue;
2843 }
2844
2845 if (htab->elf.sgot == NULL)
2846 abort ();
2847
2848 if (h != NULL)
2849 off = h->got.offset;
2850 else
2851 {
2852 if (local_got_offsets == NULL)
2853 abort ();
2854
2855 off = local_got_offsets[r_symndx];
2856 }
2857
2858 emit_tls_relocs:
2859
2860 if ((off & 1) != 0)
2861 off &= ~1;
2862 else
2863 {
2864 Elf_Internal_Rela outrel;
2865 bfd_byte *loc;
2866 int dr_type, indx;
2867
2868 if (htab->elf.srelgot == NULL)
2869 abort ();
2870
2871 outrel.r_offset = (htab->elf.sgot->output_section->vma
2872 + htab->elf.sgot->output_offset + off);
2873
2874 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2875 if (r_type == R_390_TLS_GD32)
2876 dr_type = R_390_TLS_DTPMOD;
2877 else
2878 dr_type = R_390_TLS_TPOFF;
2879 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2880 outrel.r_addend = relocation - dtpoff_base (info);
2881 else
2882 outrel.r_addend = 0;
2883 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2884 loc = htab->elf.srelgot->contents;
2885 loc += htab->elf.srelgot->reloc_count++
2886 * sizeof (Elf32_External_Rela);
2887 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2888
2889 if (r_type == R_390_TLS_GD32)
2890 {
2891 if (indx == 0)
2892 {
2893 BFD_ASSERT (! unresolved_reloc);
2894 bfd_put_32 (output_bfd,
2895 relocation - dtpoff_base (info),
2896 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2897 }
2898 else
2899 {
2900 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2901 outrel.r_offset += GOT_ENTRY_SIZE;
2902 outrel.r_addend = 0;
2903 htab->elf.srelgot->reloc_count++;
2904 loc += sizeof (Elf32_External_Rela);
2905 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2906 }
2907 }
2908
2909 if (h != NULL)
2910 h->got.offset |= 1;
2911 else
2912 local_got_offsets[r_symndx] |= 1;
2913 }
2914
2915 if (off >= (bfd_vma) -2)
2916 abort ();
2917 if (r_type == ELF32_R_TYPE (rel->r_info))
2918 {
2919 relocation = htab->elf.sgot->output_offset + off;
2920 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2921 relocation += htab->elf.sgot->output_section->vma;
2922 unresolved_reloc = FALSE;
2923 }
2924 else
2925 {
2926 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2927 contents + rel->r_offset);
2928 continue;
2929 }
2930 break;
2931
2932 case R_390_TLS_GOTIE12:
2933 case R_390_TLS_GOTIE20:
2934 case R_390_TLS_IEENT:
2935 if (h == NULL)
2936 {
2937 if (local_got_offsets == NULL)
2938 abort();
2939 off = local_got_offsets[r_symndx];
2940 if (bfd_link_pic (info))
2941 goto emit_tls_relocs;
2942 }
2943 else
2944 {
2945 off = h->got.offset;
2946 tls_type = elf_s390_hash_entry(h)->tls_type;
2947 if (bfd_link_pic (info)
2948 || h->dynindx != -1
2949 || tls_type < GOT_TLS_IE)
2950 goto emit_tls_relocs;
2951 }
2952
2953 if (htab->elf.sgot == NULL)
2954 abort ();
2955
2956 BFD_ASSERT (! unresolved_reloc);
2957 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2958 htab->elf.sgot->contents + off);
2959 relocation = htab->elf.sgot->output_offset + off;
2960 if (r_type == R_390_TLS_IEENT)
2961 relocation += htab->elf.sgot->output_section->vma;
2962 unresolved_reloc = FALSE;
2963 break;
2964
2965 case R_390_TLS_LDM32:
2966 if (! bfd_link_pic (info))
2967 /* The literal pool entry this relocation refers to gets ignored
2968 by the optimized code of the local exec model. Do nothing
2969 and the value will turn out zero. */
2970 continue;
2971
2972 if (htab->elf.sgot == NULL)
2973 abort ();
2974
2975 off = htab->tls_ldm_got.offset;
2976 if (off & 1)
2977 off &= ~1;
2978 else
2979 {
2980 Elf_Internal_Rela outrel;
2981 bfd_byte *loc;
2982
2983 if (htab->elf.srelgot == NULL)
2984 abort ();
2985
2986 outrel.r_offset = (htab->elf.sgot->output_section->vma
2987 + htab->elf.sgot->output_offset + off);
2988
2989 bfd_put_32 (output_bfd, 0,
2990 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2991 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2992 outrel.r_addend = 0;
2993 loc = htab->elf.srelgot->contents;
2994 loc += htab->elf.srelgot->reloc_count++
2995 * sizeof (Elf32_External_Rela);
2996 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2997 htab->tls_ldm_got.offset |= 1;
2998 }
2999 relocation = htab->elf.sgot->output_offset + off;
3000 unresolved_reloc = FALSE;
3001 break;
3002
3003 case R_390_TLS_LE32:
3004 if (bfd_link_dll (info))
3005 {
3006 /* Linking a shared library with non-fpic code requires
3007 a R_390_TLS_TPOFF relocation. */
3008 Elf_Internal_Rela outrel;
3009 asection *sreloc;
3010 bfd_byte *loc;
3011 int indx;
3012
3013 outrel.r_offset = rel->r_offset
3014 + input_section->output_section->vma
3015 + input_section->output_offset;
3016 if (h != NULL && h->dynindx != -1)
3017 indx = h->dynindx;
3018 else
3019 indx = 0;
3020 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3021 if (indx == 0)
3022 outrel.r_addend = relocation - dtpoff_base (info);
3023 else
3024 outrel.r_addend = 0;
3025 sreloc = elf_section_data (input_section)->sreloc;
3026 if (sreloc == NULL)
3027 abort ();
3028 loc = sreloc->contents;
3029 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3030 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3031 }
3032 else
3033 {
3034 BFD_ASSERT (! unresolved_reloc);
3035 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3036 contents + rel->r_offset);
3037 }
3038 continue;
3039
3040 case R_390_TLS_LDO32:
3041 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3042 relocation -= dtpoff_base (info);
3043 else
3044 /* When converting LDO to LE, we must negate. */
3045 relocation = -tpoff (info, relocation);
3046 break;
3047
3048 /* Relocations for tls instructions. */
3049 case R_390_TLS_LOAD:
3050 case R_390_TLS_GDCALL:
3051 case R_390_TLS_LDCALL:
3052 tls_type = GOT_UNKNOWN;
3053 if (h == NULL && local_got_offsets)
3054 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3055 else if (h != NULL)
3056 tls_type = elf_s390_hash_entry(h)->tls_type;
3057
3058 if (tls_type == GOT_TLS_GD)
3059 continue;
3060
3061 if (r_type == R_390_TLS_LOAD)
3062 {
3063 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3064 {
3065 /* IE->LE transition. Four valid cases:
3066 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3067 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3068 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3069 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3070 unsigned int insn, ry;
3071
3072 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3073 if ((insn & 0xff00f000) == 0x58000000)
3074 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3075 ry = (insn & 0x000f0000);
3076 else if ((insn & 0xff0f0000) == 0x58000000)
3077 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3078 ry = (insn & 0x0000f000) << 4;
3079 else if ((insn & 0xff00f000) == 0x5800c000)
3080 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3081 ry = (insn & 0x000f0000);
3082 else if ((insn & 0xff0f0000) == 0x580c0000)
3083 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3084 ry = (insn & 0x0000f000) << 4;
3085 else
3086 {
3087 invalid_tls_insn (input_bfd, input_section, rel);
3088 return FALSE;
3089 }
3090 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3091 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3092 }
3093 }
3094 else if (r_type == R_390_TLS_GDCALL)
3095 {
3096 unsigned int insn;
3097
3098 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3099 if ((insn & 0xff000fff) != 0x4d000000 &&
3100 (insn & 0xffff0000) != 0xc0e50000 &&
3101 (insn & 0xff000000) != 0x0d000000)
3102 {
3103 invalid_tls_insn (input_bfd, input_section, rel);
3104 return FALSE;
3105 }
3106 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3107 {
3108 if ((insn & 0xff000000) == 0x0d000000)
3109 {
3110 /* GD->LE transition.
3111 basr rx, ry -> nopr r7 */
3112 insn = 0x07070000 | (insn & 0xffff);
3113 }
3114 else if ((insn & 0xff000000) == 0x4d000000)
3115 {
3116 /* GD->LE transition.
3117 bas %r14,0(%rx,%r13) -> bc 0,0 */
3118 insn = 0x47000000;
3119 }
3120 else
3121 {
3122 /* GD->LE transition.
3123 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3124 insn = 0xc0040000;
3125 bfd_put_16 (output_bfd, 0x0000,
3126 contents + rel->r_offset + 4);
3127 }
3128 }
3129 else
3130 {
3131 /* If basr is used in the pic case to invoke
3132 _tls_get_offset, something went wrong before. */
3133 if ((insn & 0xff000000) == 0x0d000000)
3134 {
3135 invalid_tls_insn (input_bfd, input_section, rel);
3136 return FALSE;
3137 }
3138
3139 if ((insn & 0xff000000) == 0x4d000000)
3140 {
3141 /* GD->IE transition.
3142 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3143 insn = 0x5822c000;
3144 }
3145 else
3146 {
3147 /* GD->IE transition.
3148 brasl %r14,__tls_get_addr@plt ->
3149 l %r2,0(%r2,%r12) ; bcr 0,0 */
3150 insn = 0x5822c000;
3151 bfd_put_16 (output_bfd, 0x0700,
3152 contents + rel->r_offset + 4);
3153 }
3154 }
3155 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3156 }
3157 else if (r_type == R_390_TLS_LDCALL)
3158 {
3159 if (!bfd_link_pic (info))
3160 {
3161 unsigned int insn;
3162
3163 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3164 if ((insn & 0xff000fff) != 0x4d000000 &&
3165 (insn & 0xffff0000) != 0xc0e50000 &&
3166 (insn & 0xff000000) != 0x0d000000)
3167 {
3168 invalid_tls_insn (input_bfd, input_section, rel);
3169 return FALSE;
3170 }
3171
3172 if ((insn & 0xff000000) == 0x0d000000)
3173 {
3174 /* LD->LE transition.
3175 basr rx, ry -> nopr r7 */
3176 insn = 0x07070000 | (insn & 0xffff);
3177 }
3178 else if ((insn & 0xff000000) == 0x4d000000)
3179 {
3180 /* LD->LE transition.
3181 bas %r14,0(%rx,%r13) -> bc 0,0 */
3182 insn = 0x47000000;
3183 }
3184 else
3185 {
3186 /* LD->LE transition.
3187 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3188 insn = 0xc0040000;
3189 bfd_put_16 (output_bfd, 0x0000,
3190 contents + rel->r_offset + 4);
3191 }
3192 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3193 }
3194 }
3195 continue;
3196
3197 default:
3198 break;
3199 }
3200
3201 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3202 because such sections are not SEC_ALLOC and thus ld.so will
3203 not process them. */
3204 if (unresolved_reloc
3205 && !((input_section->flags & SEC_DEBUGGING) != 0
3206 && h->def_dynamic)
3207 && _bfd_elf_section_offset (output_bfd, info, input_section,
3208 rel->r_offset) != (bfd_vma) -1)
3209 _bfd_error_handler
3210 /* xgettext:c-format */
3211 (_("%pB(%pA+%#" PRIx64 "): "
3212 "unresolvable %s relocation against symbol `%s'"),
3213 input_bfd,
3214 input_section,
3215 (uint64_t) rel->r_offset,
3216 howto->name,
3217 h->root.root.string);
3218
3219 do_relocation:
3220
3221 /* When applying a 24 bit reloc we need to start one byte
3222 earlier. Otherwise the 32 bit get/put bfd operations might
3223 access a byte after the actual section. */
3224 if (r_type == R_390_PC24DBL
3225 || r_type == R_390_PLT24DBL)
3226 rel->r_offset--;
3227
3228 if (r_type == R_390_20
3229 || r_type == R_390_GOT20
3230 || r_type == R_390_GOTPLT20
3231 || r_type == R_390_TLS_GOTIE20)
3232 {
3233 relocation += rel->r_addend;
3234 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3235 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3236 contents, rel->r_offset,
3237 relocation, 0);
3238 }
3239 else
3240 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3241 contents, rel->r_offset,
3242 relocation, rel->r_addend);
3243
3244 if (r != bfd_reloc_ok)
3245 {
3246 const char *name;
3247
3248 if (h != NULL)
3249 name = h->root.root.string;
3250 else
3251 {
3252 name = bfd_elf_string_from_elf_section (input_bfd,
3253 symtab_hdr->sh_link,
3254 sym->st_name);
3255 if (name == NULL)
3256 return FALSE;
3257 if (*name == '\0')
3258 name = bfd_section_name (input_bfd, sec);
3259 }
3260
3261 if (r == bfd_reloc_overflow)
3262 (*info->callbacks->reloc_overflow)
3263 (info, (h ? &h->root : NULL), name, howto->name,
3264 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3265 else
3266 {
3267 _bfd_error_handler
3268 /* xgettext:c-format */
3269 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3270 input_bfd, input_section,
3271 (uint64_t) rel->r_offset, name, (int) r);
3272 return FALSE;
3273 }
3274 }
3275 }
3276
3277 return TRUE;
3278 }
3279
3280 /* Generate the PLT slots together with the dynamic relocations needed
3281 for IFUNC symbols. */
3282
3283 static void
3284 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3285 struct bfd_link_info *info,
3286 struct elf_link_hash_entry *h,
3287 struct elf_s390_link_hash_table *htab,
3288 bfd_vma iplt_offset,
3289 bfd_vma resolver_address)
3290 {
3291 bfd_vma iplt_index;
3292 bfd_vma got_offset;
3293 bfd_vma igotiplt_offset;
3294 Elf_Internal_Rela rela;
3295 bfd_byte *loc;
3296 asection *plt, *gotplt, *relplt;
3297 bfd_vma relative_offset;
3298
3299 if (htab->elf.iplt == NULL
3300 || htab->elf.igotplt == NULL
3301 || htab->elf.irelplt == NULL)
3302 abort ();
3303
3304 gotplt = htab->elf.igotplt;
3305 relplt = htab->elf.irelplt;
3306
3307 /* Index of the PLT slot within iplt section. */
3308 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3309 plt = htab->elf.iplt;
3310 /* Offset into the igot.plt section. */
3311 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3312 /* Offset into the got section. */
3313 got_offset = igotiplt_offset + gotplt->output_offset;
3314
3315 /* S390 uses halfwords for relative branch calc! */
3316 relative_offset = - (plt->output_offset +
3317 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3318 /* If offset is > 32768, branch to a previous branch
3319 390 can only handle +-64 K jumps. */
3320 if ( -32768 > (int) relative_offset )
3321 relative_offset
3322 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3323
3324 /* Fill in the entry in the procedure linkage table. */
3325 if (!bfd_link_pic (info))
3326 {
3327 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3328 PLT_ENTRY_SIZE);
3329
3330 /* Adjust jump to the first plt entry. */
3331 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3332 plt->contents + iplt_offset + 20);
3333
3334 /* Push the GOT offset field. */
3335 bfd_put_32 (output_bfd,
3336 (gotplt->output_section->vma
3337 + got_offset),
3338 plt->contents + iplt_offset + 24);
3339 }
3340 else if (got_offset < 4096)
3341 {
3342 /* The GOT offset is small enough to be used directly as
3343 displacement. */
3344 memcpy (plt->contents + iplt_offset,
3345 elf_s390_plt_pic12_entry,
3346 PLT_ENTRY_SIZE);
3347
3348 /* Put in the GOT offset as displacement value. The 0xc000
3349 value comes from the first word of the plt entry. Look
3350 at the elf_s390_plt_pic16_entry content. */
3351 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3352 plt->contents + iplt_offset + 2);
3353
3354 /* Adjust the jump to the first plt entry. */
3355 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3356 plt->contents + iplt_offset + 20);
3357 }
3358 else if (got_offset < 32768)
3359 {
3360 /* The GOT offset is too big for a displacement but small
3361 enough to be a signed 16 bit immediate value as it can be
3362 used in an lhi instruction. */
3363 memcpy (plt->contents + iplt_offset,
3364 elf_s390_plt_pic16_entry,
3365 PLT_ENTRY_SIZE);
3366
3367 /* Put in the GOT offset for the lhi instruction. */
3368 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3369 plt->contents + iplt_offset + 2);
3370
3371 /* Adjust the jump to the first plt entry. */
3372 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3373 plt->contents + iplt_offset + 20);
3374 }
3375 else
3376 {
3377 memcpy (plt->contents + iplt_offset,
3378 elf_s390_plt_pic_entry,
3379 PLT_ENTRY_SIZE);
3380
3381 /* Adjust the jump to the first plt entry. */
3382 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3383 plt->contents + iplt_offset + 20);
3384
3385 /* Push the GOT offset field. */
3386 bfd_put_32 (output_bfd, got_offset,
3387 plt->contents + iplt_offset + 24);
3388 }
3389 /* Insert offset into reloc. table here. */
3390 bfd_put_32 (output_bfd, relplt->output_offset +
3391 iplt_index * RELA_ENTRY_SIZE,
3392 plt->contents + iplt_offset + 28);
3393
3394 /* Fill in the entry in the global offset table.
3395 Points to instruction after GOT offset. */
3396 bfd_put_32 (output_bfd,
3397 (plt->output_section->vma
3398 + plt->output_offset
3399 + iplt_offset
3400 + 12),
3401 gotplt->contents + igotiplt_offset);
3402
3403 /* Fill in the entry in the .rela.plt section. */
3404 rela.r_offset = gotplt->output_section->vma + got_offset;
3405
3406 if (!h
3407 || h->dynindx == -1
3408 || ((bfd_link_executable (info)
3409 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3410 && h->def_regular))
3411 {
3412 /* The symbol can be locally resolved. */
3413 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3414 rela.r_addend = resolver_address;
3415 }
3416 else
3417 {
3418 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3419 rela.r_addend = 0;
3420 }
3421
3422 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3423 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3424 }
3425
3426 /* Finish up dynamic symbol handling. We set the contents of various
3427 dynamic sections here. */
3428
3429 static bfd_boolean
3430 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3431 struct bfd_link_info *info,
3432 struct elf_link_hash_entry *h,
3433 Elf_Internal_Sym *sym)
3434 {
3435 struct elf_s390_link_hash_table *htab;
3436 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3437
3438 htab = elf_s390_hash_table (info);
3439
3440 if (h->plt.offset != (bfd_vma) -1)
3441 {
3442 bfd_vma plt_index;
3443 bfd_vma got_offset;
3444 Elf_Internal_Rela rela;
3445 bfd_byte *loc;
3446 bfd_vma relative_offset;
3447
3448 /* This symbol has an entry in the procedure linkage table. Set
3449 it up. */
3450 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3451 {
3452 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3453 htab, h->plt.offset,
3454 eh->ifunc_resolver_address +
3455 eh->ifunc_resolver_section->output_offset +
3456 eh->ifunc_resolver_section->output_section->vma);
3457 /* Do not return yet. Handling of explicit GOT slots of
3458 IFUNC symbols is below. */
3459 }
3460 else
3461 {
3462 if (h->dynindx == -1
3463 || htab->elf.splt == NULL
3464 || htab->elf.sgotplt == NULL
3465 || htab->elf.srelplt == NULL)
3466 abort ();
3467
3468 /* Calc. index no.
3469 Current offset - size first entry / entry size. */
3470 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3471
3472 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3473 addr & GOT addr. */
3474 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3475
3476 /* S390 uses halfwords for relative branch calc! */
3477 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3478 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3479 /* If offset is > 32768, branch to a previous branch
3480 390 can only handle +-64 K jumps. */
3481 if ( -32768 > (int) relative_offset )
3482 relative_offset
3483 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3484
3485 /* Fill in the entry in the procedure linkage table. */
3486 if (!bfd_link_pic (info))
3487 {
3488 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3489 PLT_ENTRY_SIZE);
3490
3491 /* Adjust jump to the first plt entry. */
3492 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3493 htab->elf.splt->contents + h->plt.offset + 20);
3494
3495 /* Push the GOT offset field. */
3496 bfd_put_32 (output_bfd,
3497 (htab->elf.sgotplt->output_section->vma
3498 + htab->elf.sgotplt->output_offset
3499 + got_offset),
3500 htab->elf.splt->contents + h->plt.offset + 24);
3501 }
3502 else if (got_offset < 4096)
3503 {
3504 /* The GOT offset is small enough to be used directly as
3505 displacement. */
3506 memcpy (htab->elf.splt->contents + h->plt.offset,
3507 elf_s390_plt_pic12_entry,
3508 PLT_ENTRY_SIZE);
3509
3510 /* Put in the GOT offset as displacement value. The 0xc000
3511 value comes from the first word of the plt entry. Look
3512 at the elf_s390_plt_pic12_entry content. */
3513 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3514 htab->elf.splt->contents + h->plt.offset + 2);
3515
3516 /* Adjust the jump to the first plt entry. */
3517 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3518 htab->elf.splt->contents + h->plt.offset + 20);
3519 }
3520 else if (got_offset < 32768)
3521 {
3522 /* The GOT offset is too big for a displacement but small
3523 enough to be a signed 16 bit immediate value as it can be
3524 used in an lhi instruction. */
3525 memcpy (htab->elf.splt->contents + h->plt.offset,
3526 elf_s390_plt_pic16_entry,
3527 PLT_ENTRY_SIZE);
3528
3529 /* Put in the GOT offset for the lhi instruction. */
3530 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3531 htab->elf.splt->contents + h->plt.offset + 2);
3532
3533 /* Adjust the jump to the first plt entry. */
3534 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3535 htab->elf.splt->contents + h->plt.offset + 20);
3536 }
3537 else
3538 {
3539 memcpy (htab->elf.splt->contents + h->plt.offset,
3540 elf_s390_plt_pic_entry,
3541 PLT_ENTRY_SIZE);
3542
3543 /* Adjust the jump to the first plt entry. */
3544 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3545 htab->elf.splt->contents + h->plt.offset + 20);
3546
3547 /* Push the GOT offset field. */
3548 bfd_put_32 (output_bfd, got_offset,
3549 htab->elf.splt->contents + h->plt.offset + 24);
3550 }
3551 /* Insert offset into reloc. table here. */
3552 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3553 htab->elf.splt->contents + h->plt.offset + 28);
3554
3555 /* Fill in the entry in the global offset table.
3556 Points to instruction after GOT offset. */
3557 bfd_put_32 (output_bfd,
3558 (htab->elf.splt->output_section->vma
3559 + htab->elf.splt->output_offset
3560 + h->plt.offset
3561 + 12),
3562 htab->elf.sgotplt->contents + got_offset);
3563
3564 /* Fill in the entry in the .rela.plt section. */
3565 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3566 + htab->elf.sgotplt->output_offset
3567 + got_offset);
3568 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3569 rela.r_addend = 0;
3570 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3571 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3572
3573 if (!h->def_regular)
3574 {
3575 /* Mark the symbol as undefined, rather than as defined in
3576 the .plt section. Leave the value alone. This is a clue
3577 for the dynamic linker, to make function pointer
3578 comparisons work between an application and shared
3579 library. */
3580 sym->st_shndx = SHN_UNDEF;
3581 }
3582 }
3583 }
3584
3585 if (h->got.offset != (bfd_vma) -1
3586 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3587 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3588 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3589 {
3590 Elf_Internal_Rela rela;
3591 bfd_byte *loc;
3592
3593 /* This symbol has an entry in the global offset table. Set it
3594 up. */
3595
3596 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3597 abort ();
3598
3599 rela.r_offset = (htab->elf.sgot->output_section->vma
3600 + htab->elf.sgot->output_offset
3601 + (h->got.offset &~ (bfd_vma) 1));
3602
3603 /* If this is a static link, or it is a -Bsymbolic link and the
3604 symbol is defined locally or was forced to be local because
3605 of a version file, we just want to emit a RELATIVE reloc.
3606 The entry in the global offset table will already have been
3607 initialized in the relocate_section function. */
3608 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3609 {
3610 if (bfd_link_pic (info))
3611 {
3612 /* An explicit GOT slot usage needs GLOB_DAT. If the
3613 symbol references local the implicit got.iplt slot
3614 will be used and the IRELATIVE reloc has been created
3615 above. */
3616 goto do_glob_dat;
3617 }
3618 else
3619 {
3620 /* For non-shared objects explicit GOT slots must be
3621 filled with the PLT slot address for pointer
3622 equality reasons. */
3623 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3624 + htab->elf.iplt->output_offset
3625 + h->plt.offset),
3626 htab->elf.sgot->contents + h->got.offset);
3627 return TRUE;
3628 }
3629 }
3630 else if (bfd_link_pic (info)
3631 && SYMBOL_REFERENCES_LOCAL (info, h))
3632 {
3633 /* If this is a static link, or it is a -Bsymbolic link and
3634 the symbol is defined locally or was forced to be local
3635 because of a version file, we just want to emit a
3636 RELATIVE reloc. The entry in the global offset table
3637 will already have been initialized in the
3638 relocate_section function. */
3639 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3640 return FALSE;
3641 BFD_ASSERT((h->got.offset & 1) != 0);
3642 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3643 rela.r_addend = (h->root.u.def.value
3644 + h->root.u.def.section->output_section->vma
3645 + h->root.u.def.section->output_offset);
3646 }
3647 else
3648 {
3649 BFD_ASSERT((h->got.offset & 1) == 0);
3650 do_glob_dat:
3651 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3652 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3653 rela.r_addend = 0;
3654 }
3655
3656 loc = htab->elf.srelgot->contents;
3657 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3658 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3659 }
3660
3661 if (h->needs_copy)
3662 {
3663 Elf_Internal_Rela rela;
3664 asection *s;
3665 bfd_byte *loc;
3666
3667 /* This symbols needs a copy reloc. Set it up. */
3668
3669 if (h->dynindx == -1
3670 || (h->root.type != bfd_link_hash_defined
3671 && h->root.type != bfd_link_hash_defweak)
3672 || htab->elf.srelbss == NULL
3673 || htab->elf.sreldynrelro == NULL)
3674 abort ();
3675
3676 rela.r_offset = (h->root.u.def.value
3677 + h->root.u.def.section->output_section->vma
3678 + h->root.u.def.section->output_offset);
3679 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3680 rela.r_addend = 0;
3681 if (h->root.u.def.section == htab->elf.sdynrelro)
3682 s = htab->elf.sreldynrelro;
3683 else
3684 s = htab->elf.srelbss;
3685 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3686 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3687 }
3688
3689 /* Mark some specially defined symbols as absolute. */
3690 if (h == htab->elf.hdynamic
3691 || h == htab->elf.hgot
3692 || h == htab->elf.hplt)
3693 sym->st_shndx = SHN_ABS;
3694
3695 return TRUE;
3696 }
3697
3698 /* Used to decide how to sort relocs in an optimal manner for the
3699 dynamic linker, before writing them out. */
3700
3701 static enum elf_reloc_type_class
3702 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3703 const asection *rel_sec ATTRIBUTE_UNUSED,
3704 const Elf_Internal_Rela *rela)
3705 {
3706 bfd *abfd = info->output_bfd;
3707 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3708 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3709 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3710 Elf_Internal_Sym sym;
3711
3712 if (htab->elf.dynsym == NULL
3713 || !bed->s->swap_symbol_in (abfd,
3714 (htab->elf.dynsym->contents
3715 + r_symndx * bed->s->sizeof_sym),
3716 0, &sym))
3717 abort ();
3718
3719 /* Check relocation against STT_GNU_IFUNC symbol. */
3720 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3721 return reloc_class_ifunc;
3722
3723 switch ((int) ELF32_R_TYPE (rela->r_info))
3724 {
3725 case R_390_RELATIVE:
3726 return reloc_class_relative;
3727 case R_390_JMP_SLOT:
3728 return reloc_class_plt;
3729 case R_390_COPY:
3730 return reloc_class_copy;
3731 default:
3732 return reloc_class_normal;
3733 }
3734 }
3735
3736 /* Finish up the dynamic sections. */
3737
3738 static bfd_boolean
3739 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3740 struct bfd_link_info *info)
3741 {
3742 struct elf_s390_link_hash_table *htab;
3743 bfd *dynobj;
3744 asection *sdyn;
3745 bfd *ibfd;
3746 unsigned int i;
3747
3748 htab = elf_s390_hash_table (info);
3749 dynobj = htab->elf.dynobj;
3750 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3751
3752 if (htab->elf.dynamic_sections_created)
3753 {
3754 Elf32_External_Dyn *dyncon, *dynconend;
3755
3756 if (sdyn == NULL || htab->elf.sgot == NULL)
3757 abort ();
3758
3759 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3760 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3761 for (; dyncon < dynconend; dyncon++)
3762 {
3763 Elf_Internal_Dyn dyn;
3764 asection *s;
3765
3766 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3767
3768 switch (dyn.d_tag)
3769 {
3770 default:
3771 continue;
3772
3773 case DT_PLTGOT:
3774 s = htab->elf.sgotplt;
3775 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3776 break;
3777
3778 case DT_JMPREL:
3779 s = htab->elf.srelplt;
3780 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3781 break;
3782
3783 case DT_PLTRELSZ:
3784 dyn.d_un.d_val = htab->elf.srelplt->size;
3785 if (htab->elf.irelplt)
3786 dyn.d_un.d_val += htab->elf.irelplt->size;
3787 break;
3788 }
3789
3790 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3791 }
3792
3793 /* Fill in the special first entry in the procedure linkage table. */
3794 if (htab->elf.splt && htab->elf.splt->size > 0)
3795 {
3796 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3797 if (bfd_link_pic (info))
3798 {
3799 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3800 PLT_FIRST_ENTRY_SIZE);
3801 }
3802 else
3803 {
3804 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3805 PLT_FIRST_ENTRY_SIZE);
3806 bfd_put_32 (output_bfd,
3807 htab->elf.sgotplt->output_section->vma
3808 + htab->elf.sgotplt->output_offset,
3809 htab->elf.splt->contents + 24);
3810 }
3811 elf_section_data (htab->elf.splt->output_section)
3812 ->this_hdr.sh_entsize = 4;
3813 }
3814
3815 }
3816
3817 if (htab->elf.sgotplt)
3818 {
3819 /* Fill in the first three entries in the global offset table. */
3820 if (htab->elf.sgotplt->size > 0)
3821 {
3822 bfd_put_32 (output_bfd,
3823 (sdyn == NULL ? (bfd_vma) 0
3824 : sdyn->output_section->vma + sdyn->output_offset),
3825 htab->elf.sgotplt->contents);
3826 /* One entry for shared object struct ptr. */
3827 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3828 /* One entry for _dl_runtime_resolve. */
3829 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3830 }
3831
3832 elf_section_data (htab->elf.sgotplt->output_section)
3833 ->this_hdr.sh_entsize = 4;
3834 }
3835 /* Finish dynamic symbol for local IFUNC symbols. */
3836 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3837 {
3838 struct plt_entry *local_plt;
3839 Elf_Internal_Sym *isym;
3840 Elf_Internal_Shdr *symtab_hdr;
3841
3842 symtab_hdr = &elf_symtab_hdr (ibfd);
3843
3844 if (!is_s390_elf (ibfd))
3845 continue;
3846
3847 local_plt = elf_s390_local_plt (ibfd);
3848 if (local_plt != NULL)
3849 for (i = 0; i < symtab_hdr->sh_info; i++)
3850 {
3851 if (local_plt[i].plt.offset != (bfd_vma) -1)
3852 {
3853 asection *sec = local_plt[i].sec;
3854 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3855 if (isym == NULL)
3856 return FALSE;
3857
3858 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3859 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3860 local_plt[i].plt.offset,
3861 isym->st_value
3862 + sec->output_section->vma
3863 + sec->output_offset);
3864
3865 }
3866 }
3867 }
3868 return TRUE;
3869 }
3870 \f
3871 /* Support for core dump NOTE sections. */
3872
3873 static bfd_boolean
3874 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3875 {
3876 int offset;
3877 unsigned int size;
3878
3879 switch (note->descsz)
3880 {
3881 default:
3882 return FALSE;
3883
3884 case 224: /* S/390 Linux. */
3885 /* pr_cursig */
3886 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3887
3888 /* pr_pid */
3889 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3890
3891 /* pr_reg */
3892 offset = 72;
3893 size = 144;
3894 break;
3895 }
3896
3897 /* Make a ".reg/999" section. */
3898 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3899 size, note->descpos + offset);
3900 }
3901
3902 static bfd_boolean
3903 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3904 {
3905 switch (note->descsz)
3906 {
3907 default:
3908 return FALSE;
3909
3910 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3911 elf_tdata (abfd)->core->pid
3912 = bfd_get_32 (abfd, note->descdata + 12);
3913 elf_tdata (abfd)->core->program
3914 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3915 elf_tdata (abfd)->core->command
3916 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3917 break;
3918 }
3919
3920 /* Note that for some reason, a spurious space is tacked
3921 onto the end of the args in some (at least one anyway)
3922 implementations, so strip it off if it exists. */
3923
3924 {
3925 char *command = elf_tdata (abfd)->core->command;
3926 int n = strlen (command);
3927
3928 if (0 < n && command[n - 1] == ' ')
3929 command[n - 1] = '\0';
3930 }
3931
3932 return TRUE;
3933 }
3934
3935 static char *
3936 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3937 int note_type, ...)
3938 {
3939 va_list ap;
3940
3941 switch (note_type)
3942 {
3943 default:
3944 return NULL;
3945
3946 case NT_PRPSINFO:
3947 {
3948 char data[124] ATTRIBUTE_NONSTRING = { 0 };
3949 const char *fname, *psargs;
3950
3951 va_start (ap, note_type);
3952 fname = va_arg (ap, const char *);
3953 psargs = va_arg (ap, const char *);
3954 va_end (ap);
3955
3956 strncpy (data + 28, fname, 16);
3957 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3958 DIAGNOSTIC_PUSH;
3959 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3960 -Wstringop-truncation:
3961 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3962 */
3963 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3964 #endif
3965 strncpy (data + 44, psargs, 80);
3966 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3967 DIAGNOSTIC_POP;
3968 #endif
3969 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3970 &data, sizeof (data));
3971 }
3972
3973 case NT_PRSTATUS:
3974 {
3975 char data[224] = { 0 };
3976 long pid;
3977 int cursig;
3978 const void *gregs;
3979
3980 va_start (ap, note_type);
3981 pid = va_arg (ap, long);
3982 cursig = va_arg (ap, int);
3983 gregs = va_arg (ap, const void *);
3984 va_end (ap);
3985
3986 bfd_put_16 (abfd, cursig, data + 12);
3987 bfd_put_32 (abfd, pid, data + 24);
3988 memcpy (data + 72, gregs, 144);
3989 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3990 &data, sizeof (data));
3991 }
3992 }
3993 /* NOTREACHED */
3994 }
3995 \f
3996 /* Return address for Ith PLT stub in section PLT, for relocation REL
3997 or (bfd_vma) -1 if it should not be included. */
3998
3999 static bfd_vma
4000 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4001 const arelent *rel ATTRIBUTE_UNUSED)
4002 {
4003 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4004 }
4005
4006 /* Merge backend specific data from an object file to the output
4007 object file when linking. */
4008
4009 static bfd_boolean
4010 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4011 {
4012 bfd *obfd = info->output_bfd;
4013
4014 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4015 return TRUE;
4016
4017 if (!elf_s390_merge_obj_attributes (ibfd, info))
4018 return FALSE;
4019
4020 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4021 return TRUE;
4022 }
4023
4024
4025 #define TARGET_BIG_SYM s390_elf32_vec
4026 #define TARGET_BIG_NAME "elf32-s390"
4027 #define ELF_ARCH bfd_arch_s390
4028 #define ELF_TARGET_ID S390_ELF_DATA
4029 #define ELF_MACHINE_CODE EM_S390
4030 #define ELF_MACHINE_ALT1 EM_S390_OLD
4031 #define ELF_MAXPAGESIZE 0x1000
4032
4033 #define elf_backend_can_gc_sections 1
4034 #define elf_backend_can_refcount 1
4035 #define elf_backend_want_got_plt 1
4036 #define elf_backend_plt_readonly 1
4037 #define elf_backend_want_plt_sym 0
4038 #define elf_backend_got_header_size 12
4039 #define elf_backend_want_dynrelro 1
4040 #define elf_backend_rela_normal 1
4041
4042 #define elf_info_to_howto elf_s390_info_to_howto
4043
4044 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4045 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4046 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4047 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4048
4049 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4050
4051 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4052 #define elf_backend_check_relocs elf_s390_check_relocs
4053 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4054 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4055 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4056 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4057 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4058 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4059 #define elf_backend_relocate_section elf_s390_relocate_section
4060 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4061 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4062 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4063 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4064 #define elf_backend_write_core_note elf_s390_write_core_note
4065 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4066 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4067
4068 #define bfd_elf32_mkobject elf_s390_mkobject
4069 #define elf_backend_object_p elf_s390_object_p
4070
4071 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4072
4073 #include "elf32-target.h"
GDB Binutils - Deliverables
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