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[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include <stdarg.h>
29
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
36
37 /* The relocation "howto" table. */
38
39 static reloc_howto_type elf_howto_table[] =
40 {
41 HOWTO (R_390_NONE, /* type */
42 0, /* rightshift */
43 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
44 0, /* bitsize */
45 FALSE, /* pc_relative */
46 0, /* bitpos */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
51 0, /* src_mask */
52 0, /* dst_mask */
53 FALSE), /* pcrel_offset */
54
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
172 };
173
174 /* GNU extension to record C++ vtable hierarchy. */
175 static reloc_howto_type elf32_s390_vtinherit_howto =
176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
177 static reloc_howto_type elf32_s390_vtentry_howto =
178 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
179
180 static reloc_howto_type *
181 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182 bfd_reloc_code_real_type code)
183 {
184 switch (code)
185 {
186 case BFD_RELOC_NONE:
187 return &elf_howto_table[(int) R_390_NONE];
188 case BFD_RELOC_8:
189 return &elf_howto_table[(int) R_390_8];
190 case BFD_RELOC_390_12:
191 return &elf_howto_table[(int) R_390_12];
192 case BFD_RELOC_16:
193 return &elf_howto_table[(int) R_390_16];
194 case BFD_RELOC_32:
195 return &elf_howto_table[(int) R_390_32];
196 case BFD_RELOC_CTOR:
197 return &elf_howto_table[(int) R_390_32];
198 case BFD_RELOC_32_PCREL:
199 return &elf_howto_table[(int) R_390_PC32];
200 case BFD_RELOC_390_GOT12:
201 return &elf_howto_table[(int) R_390_GOT12];
202 case BFD_RELOC_32_GOT_PCREL:
203 return &elf_howto_table[(int) R_390_GOT32];
204 case BFD_RELOC_390_PLT32:
205 return &elf_howto_table[(int) R_390_PLT32];
206 case BFD_RELOC_390_COPY:
207 return &elf_howto_table[(int) R_390_COPY];
208 case BFD_RELOC_390_GLOB_DAT:
209 return &elf_howto_table[(int) R_390_GLOB_DAT];
210 case BFD_RELOC_390_JMP_SLOT:
211 return &elf_howto_table[(int) R_390_JMP_SLOT];
212 case BFD_RELOC_390_RELATIVE:
213 return &elf_howto_table[(int) R_390_RELATIVE];
214 case BFD_RELOC_32_GOTOFF:
215 return &elf_howto_table[(int) R_390_GOTOFF32];
216 case BFD_RELOC_390_GOTPC:
217 return &elf_howto_table[(int) R_390_GOTPC];
218 case BFD_RELOC_390_GOT16:
219 return &elf_howto_table[(int) R_390_GOT16];
220 case BFD_RELOC_16_PCREL:
221 return &elf_howto_table[(int) R_390_PC16];
222 case BFD_RELOC_390_PC12DBL:
223 return &elf_howto_table[(int) R_390_PC12DBL];
224 case BFD_RELOC_390_PLT12DBL:
225 return &elf_howto_table[(int) R_390_PLT12DBL];
226 case BFD_RELOC_390_PC16DBL:
227 return &elf_howto_table[(int) R_390_PC16DBL];
228 case BFD_RELOC_390_PLT16DBL:
229 return &elf_howto_table[(int) R_390_PLT16DBL];
230 case BFD_RELOC_390_PC24DBL:
231 return &elf_howto_table[(int) R_390_PC24DBL];
232 case BFD_RELOC_390_PLT24DBL:
233 return &elf_howto_table[(int) R_390_PLT24DBL];
234 case BFD_RELOC_390_PC32DBL:
235 return &elf_howto_table[(int) R_390_PC32DBL];
236 case BFD_RELOC_390_PLT32DBL:
237 return &elf_howto_table[(int) R_390_PLT32DBL];
238 case BFD_RELOC_390_GOTPCDBL:
239 return &elf_howto_table[(int) R_390_GOTPCDBL];
240 case BFD_RELOC_390_GOTENT:
241 return &elf_howto_table[(int) R_390_GOTENT];
242 case BFD_RELOC_16_GOTOFF:
243 return &elf_howto_table[(int) R_390_GOTOFF16];
244 case BFD_RELOC_390_GOTPLT12:
245 return &elf_howto_table[(int) R_390_GOTPLT12];
246 case BFD_RELOC_390_GOTPLT16:
247 return &elf_howto_table[(int) R_390_GOTPLT16];
248 case BFD_RELOC_390_GOTPLT32:
249 return &elf_howto_table[(int) R_390_GOTPLT32];
250 case BFD_RELOC_390_GOTPLTENT:
251 return &elf_howto_table[(int) R_390_GOTPLTENT];
252 case BFD_RELOC_390_PLTOFF16:
253 return &elf_howto_table[(int) R_390_PLTOFF16];
254 case BFD_RELOC_390_PLTOFF32:
255 return &elf_howto_table[(int) R_390_PLTOFF32];
256 case BFD_RELOC_390_TLS_LOAD:
257 return &elf_howto_table[(int) R_390_TLS_LOAD];
258 case BFD_RELOC_390_TLS_GDCALL:
259 return &elf_howto_table[(int) R_390_TLS_GDCALL];
260 case BFD_RELOC_390_TLS_LDCALL:
261 return &elf_howto_table[(int) R_390_TLS_LDCALL];
262 case BFD_RELOC_390_TLS_GD32:
263 return &elf_howto_table[(int) R_390_TLS_GD32];
264 case BFD_RELOC_390_TLS_GOTIE12:
265 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266 case BFD_RELOC_390_TLS_GOTIE32:
267 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268 case BFD_RELOC_390_TLS_LDM32:
269 return &elf_howto_table[(int) R_390_TLS_LDM32];
270 case BFD_RELOC_390_TLS_IE32:
271 return &elf_howto_table[(int) R_390_TLS_IE32];
272 case BFD_RELOC_390_TLS_IEENT:
273 return &elf_howto_table[(int) R_390_TLS_IEENT];
274 case BFD_RELOC_390_TLS_LE32:
275 return &elf_howto_table[(int) R_390_TLS_LE32];
276 case BFD_RELOC_390_TLS_LDO32:
277 return &elf_howto_table[(int) R_390_TLS_LDO32];
278 case BFD_RELOC_390_TLS_DTPMOD:
279 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280 case BFD_RELOC_390_TLS_DTPOFF:
281 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282 case BFD_RELOC_390_TLS_TPOFF:
283 return &elf_howto_table[(int) R_390_TLS_TPOFF];
284 case BFD_RELOC_390_20:
285 return &elf_howto_table[(int) R_390_20];
286 case BFD_RELOC_390_GOT20:
287 return &elf_howto_table[(int) R_390_GOT20];
288 case BFD_RELOC_390_GOTPLT20:
289 return &elf_howto_table[(int) R_390_GOTPLT20];
290 case BFD_RELOC_390_TLS_GOTIE20:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292 case BFD_RELOC_390_IRELATIVE:
293 return &elf_howto_table[(int) R_390_IRELATIVE];
294 case BFD_RELOC_VTABLE_INHERIT:
295 return &elf32_s390_vtinherit_howto;
296 case BFD_RELOC_VTABLE_ENTRY:
297 return &elf32_s390_vtentry_howto;
298 default:
299 break;
300 }
301 return 0;
302 }
303
304 static reloc_howto_type *
305 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
306 const char *r_name)
307 {
308 unsigned int i;
309
310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311 if (elf_howto_table[i].name != NULL
312 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313 return &elf_howto_table[i];
314
315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316 return &elf32_s390_vtinherit_howto;
317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318 return &elf32_s390_vtentry_howto;
319
320 return NULL;
321 }
322
323 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
324 and elf32-s390.c has its own copy. */
325
326 static void
327 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
328 arelent *cache_ptr,
329 Elf_Internal_Rela *dst)
330 {
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
332 switch (r_type)
333 {
334 case R_390_GNU_VTINHERIT:
335 cache_ptr->howto = &elf32_s390_vtinherit_howto;
336 break;
337
338 case R_390_GNU_VTENTRY:
339 cache_ptr->howto = &elf32_s390_vtentry_howto;
340 break;
341
342 default:
343 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
344 {
345 /* xgettext:c-format */
346 _bfd_error_handler (_("%B: invalid relocation type %d"),
347 abfd, (int) r_type);
348 r_type = R_390_NONE;
349 }
350 cache_ptr->howto = &elf_howto_table[r_type];
351 }
352 }
353
354 /* A relocation function which doesn't do anything. */
355 static bfd_reloc_status_type
356 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
357 arelent *reloc_entry,
358 asymbol *symbol ATTRIBUTE_UNUSED,
359 void * data ATTRIBUTE_UNUSED,
360 asection *input_section,
361 bfd *output_bfd,
362 char **error_message ATTRIBUTE_UNUSED)
363 {
364 if (output_bfd)
365 reloc_entry->address += input_section->output_offset;
366 return bfd_reloc_ok;
367 }
368
369 /* Handle the large displacement relocs. */
370 static bfd_reloc_status_type
371 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
372 arelent *reloc_entry,
373 asymbol *symbol,
374 void * data ATTRIBUTE_UNUSED,
375 asection *input_section,
376 bfd *output_bfd,
377 char **error_message ATTRIBUTE_UNUSED)
378 {
379 reloc_howto_type *howto = reloc_entry->howto;
380 bfd_vma relocation;
381 bfd_vma insn;
382
383 if (output_bfd != (bfd *) NULL
384 && (symbol->flags & BSF_SECTION_SYM) == 0
385 && (! howto->partial_inplace
386 || reloc_entry->addend == 0))
387 {
388 reloc_entry->address += input_section->output_offset;
389 return bfd_reloc_ok;
390 }
391
392 if (output_bfd != NULL)
393 return bfd_reloc_continue;
394
395 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
396 return bfd_reloc_outofrange;
397
398 relocation = (symbol->value
399 + symbol->section->output_section->vma
400 + symbol->section->output_offset);
401 relocation += reloc_entry->addend;
402 if (howto->pc_relative)
403 {
404 relocation -= (input_section->output_section->vma
405 + input_section->output_offset);
406 relocation -= reloc_entry->address;
407 }
408
409 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
410 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
411 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
412
413 if ((bfd_signed_vma) relocation < - 0x80000
414 || (bfd_signed_vma) relocation > 0x7ffff)
415 return bfd_reloc_overflow;
416 else
417 return bfd_reloc_ok;
418 }
419
420 static bfd_boolean
421 elf_s390_is_local_label_name (bfd *abfd, const char *name)
422 {
423 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
424 return TRUE;
425
426 return _bfd_elf_is_local_label_name (abfd, name);
427 }
428
429 /* Functions for the 390 ELF linker. */
430
431 /* The name of the dynamic interpreter. This is put in the .interp
432 section. */
433
434 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
435
436 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
437 copying dynamic variables from a shared lib into an app's dynbss
438 section, and instead use a dynamic relocation to point into the
439 shared lib. */
440 #define ELIMINATE_COPY_RELOCS 1
441
442 /* The size in bytes of the first entry in the procedure linkage table. */
443 #define PLT_FIRST_ENTRY_SIZE 32
444 /* The size in bytes of an entry in the procedure linkage table. */
445 #define PLT_ENTRY_SIZE 32
446
447 #define GOT_ENTRY_SIZE 4
448
449 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
450
451 /* The first three entries in a procedure linkage table are reserved,
452 and the initial contents are unimportant (we zero them out).
453 Subsequent entries look like this. See the SVR4 ABI 386
454 supplement to see how this works. */
455
456 /* For the s390, simple addr offset can only be 0 - 4096.
457 To use the full 2 GB address space, several instructions
458 are needed to load an address in a register and execute
459 a branch( or just saving the address)
460
461 Furthermore, only r 0 and 1 are free to use!!! */
462
463 /* The first 3 words in the GOT are then reserved.
464 Word 0 is the address of the dynamic table.
465 Word 1 is a pointer to a structure describing the object
466 Word 2 is used to point to the loader entry address.
467
468 The code for position independent PLT entries looks like this:
469
470 r12 holds addr of the current GOT at entry to the PLT
471
472 The GOT holds the address in the PLT to be executed.
473 The loader then gets:
474 24(15) = Pointer to the structure describing the object.
475 28(15) = Offset into rela.plt
476
477 The loader must then find the module where the function is
478 and insert the address in the GOT.
479
480 Note: 390 can only address +- 64 K relative.
481 We check if offset > 65536, then make a relative branch -64xxx
482 back to a previous defined branch
483
484 PLT1: BASR 1,0 # 2 bytes
485 L 1,22(1) # 4 bytes Load offset in GOT in r 1
486 L 1,(1,12) # 4 bytes Load address from GOT in r1
487 BCR 15,1 # 2 bytes Jump to address
488 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
489 L 1,14(1) # 4 bytes Load offset in symol table in r1
490 BRC 15,-x # 4 bytes Jump to start of PLT
491 .word 0 # 2 bytes filler
492 .long ? # 4 bytes offset in GOT
493 .long ? # 4 bytes offset into rela.plt
494
495 This was the general case. There are two additional, optimizes PLT
496 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
497 First the one for GOT offsets < 4096:
498
499 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
500 BCR 15,1 # 2 bytes Jump to address
501 .word 0,0,0 # 6 bytes filler
502 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
503 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
504 BRC 15,-x # 4 bytes Jump to start of PLT
505 .word 0,0,0 # 6 bytes filler
506 .long ? # 4 bytes offset into rela.plt
507
508 Second the one for GOT offsets < 32768:
509
510 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
511 L 1,(1,12) # 4 bytes Load address from GOT to r1
512 BCR 15,1 # 2 bytes Jump to address
513 .word 0 # 2 bytes filler
514 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
515 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
516 BRC 15,-x # 4 bytes Jump to start of PLT
517 .word 0,0,0 # 6 bytes filler
518 .long ? # 4 bytes offset into rela.plt
519
520 Total = 32 bytes per PLT entry
521
522 The code for static build PLT entries looks like this:
523
524 PLT1: BASR 1,0 # 2 bytes
525 L 1,22(1) # 4 bytes Load address of GOT entry
526 L 1,0(0,1) # 4 bytes Load address from GOT in r1
527 BCR 15,1 # 2 bytes Jump to address
528 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
529 L 1,14(1) # 4 bytes Load offset in symbol table in r1
530 BRC 15,-x # 4 bytes Jump to start of PLT
531 .word 0 # 2 bytes filler
532 .long ? # 4 bytes address of GOT entry
533 .long ? # 4 bytes offset into rela.plt */
534
535 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
536 {
537 0x0d, 0x10, /* basr %r1,%r0 */
538 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
539 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
540 0x07, 0xf1, /* br %r1 */
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
543 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
544 0x00, 0x00, /* padding */
545 0x00, 0x00, 0x00, 0x00, /* GOT offset */
546 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
547 };
548
549 /* Generic PLT pic entry. */
550 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
551 {
552 0x0d, 0x10, /* basr %r1,%r0 */
553 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
554 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
555 0x07, 0xf1, /* br %r1 */
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
558 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
559 0x00, 0x00, /* padding */
560 0x00, 0x00, 0x00, 0x00, /* GOT offset */
561 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
562 };
563
564 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
565 when generating the PLT slot with the GOT offset. */
566 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
567 {
568 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
569 0x07, 0xf1, /* br %r1 */
570 0x00, 0x00, 0x00, 0x00, /* padding */
571 0x00, 0x00,
572 0x0d, 0x10, /* basr %r1,%r0 */
573 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
574 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
575 0x00, 0x00, 0x00, 0x00,
576 0x00, 0x00, 0x00, 0x00
577 };
578
579 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
580 when generating the PLT slot with the GOT offset. */
581 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
582 {
583 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
584 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
585 0x07, 0xf1, /* br %r1 */
586 0x00, 0x00,
587 0x0d, 0x10, /* basr %r1,%r0 */
588 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
589 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
590 0x00, 0x00, 0x00, 0x00,
591 0x00, 0x00, 0x00, 0x00,
592 0x00, 0x00
593 };
594
595 /* The first PLT entry pushes the offset into the rela.plt
596 from R1 onto the stack at 8(15) and the loader object info
597 at 12(15), loads the loader address in R1 and jumps to it. */
598
599 /* The first entry in the PLT for PIC code:
600
601 PLT0:
602 ST 1,28(15) # R1 has offset into rela.plt
603 L 1,4(12) # Get loader ino(object struct address)
604 ST 1,24(15) # Store address
605 L 1,8(12) # Entry address of loader in R1
606 BR 1 # Jump to loader
607
608 The first entry in the PLT for static code:
609
610 PLT0:
611 ST 1,28(15) # R1 has offset into rela.plt
612 BASR 1,0
613 L 1,18(0,1) # Get address of GOT
614 MVC 24(4,15),4(1) # Move loader ino to stack
615 L 1,8(1) # Get address of loader
616 BR 1 # Jump to loader
617 .word 0 # filler
618 .long got # address of GOT */
619
620 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
621 {
622 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
623 0x0d, 0x10, /* basr %r1,%r0 */
624 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
625 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
626 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
627 0x07, 0xf1, /* br %r1 */
628 0x00, 0x00, 0x00, 0x00,
629 0x00, 0x00, 0x00, 0x00,
630 0x00, 0x00
631 };
632
633 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
634 {
635 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
636 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
637 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
638 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
639 0x07, 0xf1, /* br %r1 */
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00, 0x00, 0x00,
642 0x00, 0x00, 0x00, 0x00,
643 0x00, 0x00
644 };
645
646
647 /* s390 ELF linker hash entry. */
648
649 struct elf_s390_link_hash_entry
650 {
651 struct elf_link_hash_entry elf;
652
653 /* Track dynamic relocs copied for this symbol. */
654 struct elf_dyn_relocs *dyn_relocs;
655
656 /* Number of GOTPLT references for a function. */
657 bfd_signed_vma gotplt_refcount;
658
659 #define GOT_UNKNOWN 0
660 #define GOT_NORMAL 1
661 #define GOT_TLS_GD 2
662 #define GOT_TLS_IE 3
663 #define GOT_TLS_IE_NLT 4
664 unsigned char tls_type;
665
666 /* For pointer equality reasons we might need to change the symbol
667 type from STT_GNU_IFUNC to STT_FUNC together with its value and
668 section entry. So after alloc_dynrelocs only these values should
669 be used. In order to check whether a symbol is IFUNC use
670 s390_is_ifunc_symbol_p. */
671 bfd_vma ifunc_resolver_address;
672 asection *ifunc_resolver_section;
673 };
674
675 #define elf_s390_hash_entry(ent) \
676 ((struct elf_s390_link_hash_entry *)(ent))
677
678 /* This structure represents an entry in the local PLT list needed for
679 local IFUNC symbols. */
680 struct plt_entry
681 {
682 /* The section of the local symbol.
683 Set in relocate_section and used in finish_dynamic_sections. */
684 asection *sec;
685
686 union
687 {
688 bfd_signed_vma refcount;
689 bfd_vma offset;
690 } plt;
691 };
692
693 /* NOTE: Keep this structure in sync with
694 the one declared in elf64-s390.c. */
695 struct elf_s390_obj_tdata
696 {
697 struct elf_obj_tdata root;
698
699 /* A local PLT is needed for ifunc symbols. */
700 struct plt_entry *local_plt;
701
702 /* TLS type for each local got entry. */
703 char *local_got_tls_type;
704 };
705
706 #define elf_s390_tdata(abfd) \
707 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
708
709 #define elf_s390_local_plt(abfd) \
710 (elf_s390_tdata (abfd)->local_plt)
711
712 #define elf_s390_local_got_tls_type(abfd) \
713 (elf_s390_tdata (abfd)->local_got_tls_type)
714
715 #define is_s390_elf(bfd) \
716 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
717 && elf_tdata (bfd) != NULL \
718 && elf_object_id (bfd) == S390_ELF_DATA)
719
720 static bfd_boolean
721 elf_s390_mkobject (bfd *abfd)
722 {
723 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
724 S390_ELF_DATA);
725 }
726
727 static bfd_boolean
728 elf_s390_object_p (bfd *abfd)
729 {
730 /* Set the right machine number for an s390 elf32 file. */
731 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
732 }
733
734 /* s390 ELF linker hash table. */
735
736 struct elf_s390_link_hash_table
737 {
738 struct elf_link_hash_table elf;
739
740 /* Short-cuts to get to dynamic linker sections. */
741 asection *irelifunc;
742
743 union
744 {
745 bfd_signed_vma refcount;
746 bfd_vma offset;
747 } tls_ldm_got;
748
749 /* Small local sym cache. */
750 struct sym_cache sym_cache;
751 };
752
753 /* Get the s390 ELF linker hash table from a link_info structure. */
754
755 #define elf_s390_hash_table(p) \
756 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
757 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
758
759 #undef ELF64
760 #include "elf-s390-common.c"
761
762 /* Create an entry in an s390 ELF linker hash table. */
763
764 static struct bfd_hash_entry *
765 link_hash_newfunc (struct bfd_hash_entry *entry,
766 struct bfd_hash_table *table,
767 const char *string)
768 {
769 /* Allocate the structure if it has not already been allocated by a
770 subclass. */
771 if (entry == NULL)
772 {
773 entry = bfd_hash_allocate (table,
774 sizeof (struct elf_s390_link_hash_entry));
775 if (entry == NULL)
776 return entry;
777 }
778
779 /* Call the allocation method of the superclass. */
780 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
781 if (entry != NULL)
782 {
783 struct elf_s390_link_hash_entry *eh;
784
785 eh = (struct elf_s390_link_hash_entry *) entry;
786 eh->dyn_relocs = NULL;
787 eh->gotplt_refcount = 0;
788 eh->tls_type = GOT_UNKNOWN;
789 eh->ifunc_resolver_address = 0;
790 eh->ifunc_resolver_section = NULL;
791 }
792
793 return entry;
794 }
795
796 /* Create an s390 ELF linker hash table. */
797
798 static struct bfd_link_hash_table *
799 elf_s390_link_hash_table_create (bfd *abfd)
800 {
801 struct elf_s390_link_hash_table *ret;
802 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
803
804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
805 if (ret == NULL)
806 return NULL;
807
808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
809 sizeof (struct elf_s390_link_hash_entry),
810 S390_ELF_DATA))
811 {
812 free (ret);
813 return NULL;
814 }
815
816 return &ret->elf.root;
817 }
818
819 /* Copy the extra info we tack onto an elf_link_hash_entry. */
820
821 static void
822 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
823 struct elf_link_hash_entry *dir,
824 struct elf_link_hash_entry *ind)
825 {
826 struct elf_s390_link_hash_entry *edir, *eind;
827
828 edir = (struct elf_s390_link_hash_entry *) dir;
829 eind = (struct elf_s390_link_hash_entry *) ind;
830
831 if (eind->dyn_relocs != NULL)
832 {
833 if (edir->dyn_relocs != NULL)
834 {
835 struct elf_dyn_relocs **pp;
836 struct elf_dyn_relocs *p;
837
838 /* Add reloc counts against the indirect sym to the direct sym
839 list. Merge any entries against the same section. */
840 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
841 {
842 struct elf_dyn_relocs *q;
843
844 for (q = edir->dyn_relocs; q != NULL; q = q->next)
845 if (q->sec == p->sec)
846 {
847 q->pc_count += p->pc_count;
848 q->count += p->count;
849 *pp = p->next;
850 break;
851 }
852 if (q == NULL)
853 pp = &p->next;
854 }
855 *pp = edir->dyn_relocs;
856 }
857
858 edir->dyn_relocs = eind->dyn_relocs;
859 eind->dyn_relocs = NULL;
860 }
861
862 if (ind->root.type == bfd_link_hash_indirect
863 && dir->got.refcount <= 0)
864 {
865 edir->tls_type = eind->tls_type;
866 eind->tls_type = GOT_UNKNOWN;
867 }
868
869 if (ELIMINATE_COPY_RELOCS
870 && ind->root.type != bfd_link_hash_indirect
871 && dir->dynamic_adjusted)
872 {
873 /* If called to transfer flags for a weakdef during processing
874 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
875 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
876 if (dir->versioned != versioned_hidden)
877 dir->ref_dynamic |= ind->ref_dynamic;
878 dir->ref_regular |= ind->ref_regular;
879 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
880 dir->needs_plt |= ind->needs_plt;
881 }
882 else
883 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
884 }
885
886 static int
887 elf_s390_tls_transition (struct bfd_link_info *info,
888 int r_type,
889 int is_local)
890 {
891 if (bfd_link_pic (info))
892 return r_type;
893
894 switch (r_type)
895 {
896 case R_390_TLS_GD32:
897 case R_390_TLS_IE32:
898 if (is_local)
899 return R_390_TLS_LE32;
900 return R_390_TLS_IE32;
901 case R_390_TLS_GOTIE32:
902 if (is_local)
903 return R_390_TLS_LE32;
904 return R_390_TLS_GOTIE32;
905 case R_390_TLS_LDM32:
906 return R_390_TLS_LE32;
907 }
908
909 return r_type;
910 }
911
912 /* Look through the relocs for a section during the first phase, and
913 allocate space in the global offset table or procedure linkage
914 table. */
915
916 static bfd_boolean
917 elf_s390_check_relocs (bfd *abfd,
918 struct bfd_link_info *info,
919 asection *sec,
920 const Elf_Internal_Rela *relocs)
921 {
922 struct elf_s390_link_hash_table *htab;
923 Elf_Internal_Shdr *symtab_hdr;
924 struct elf_link_hash_entry **sym_hashes;
925 const Elf_Internal_Rela *rel;
926 const Elf_Internal_Rela *rel_end;
927 asection *sreloc;
928 bfd_signed_vma *local_got_refcounts;
929 int tls_type, old_tls_type;
930 Elf_Internal_Sym *isym;
931
932 if (bfd_link_relocatable (info))
933 return TRUE;
934
935 BFD_ASSERT (is_s390_elf (abfd));
936
937 htab = elf_s390_hash_table (info);
938 symtab_hdr = &elf_symtab_hdr (abfd);
939 sym_hashes = elf_sym_hashes (abfd);
940 local_got_refcounts = elf_local_got_refcounts (abfd);
941
942 sreloc = NULL;
943
944 rel_end = relocs + sec->reloc_count;
945 for (rel = relocs; rel < rel_end; rel++)
946 {
947 unsigned int r_type;
948 unsigned int r_symndx;
949 struct elf_link_hash_entry *h;
950
951 r_symndx = ELF32_R_SYM (rel->r_info);
952
953 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
954 {
955 /* xgettext:c-format */
956 _bfd_error_handler (_("%B: bad symbol index: %d"),
957 abfd, r_symndx);
958 return FALSE;
959 }
960
961 if (r_symndx < symtab_hdr->sh_info)
962 {
963 /* A local symbol. */
964 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
965 abfd, r_symndx);
966 if (isym == NULL)
967 return FALSE;
968
969 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
970 {
971 struct plt_entry *plt;
972
973 if (htab->elf.dynobj == NULL)
974 htab->elf.dynobj = abfd;
975
976 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
977 return FALSE;
978
979 if (local_got_refcounts == NULL)
980 {
981 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
982 return FALSE;
983 local_got_refcounts = elf_local_got_refcounts (abfd);
984 }
985 plt = elf_s390_local_plt (abfd);
986 plt[r_symndx].plt.refcount++;
987 }
988 h = NULL;
989 }
990 else
991 {
992 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
993 while (h->root.type == bfd_link_hash_indirect
994 || h->root.type == bfd_link_hash_warning)
995 h = (struct elf_link_hash_entry *) h->root.u.i.link;
996 }
997
998 /* Create got section and local_got_refcounts array if they
999 are needed. */
1000 r_type = elf_s390_tls_transition (info,
1001 ELF32_R_TYPE (rel->r_info),
1002 h == NULL);
1003 switch (r_type)
1004 {
1005 case R_390_GOT12:
1006 case R_390_GOT16:
1007 case R_390_GOT20:
1008 case R_390_GOT32:
1009 case R_390_GOTENT:
1010 case R_390_GOTPLT12:
1011 case R_390_GOTPLT16:
1012 case R_390_GOTPLT20:
1013 case R_390_GOTPLT32:
1014 case R_390_GOTPLTENT:
1015 case R_390_TLS_GD32:
1016 case R_390_TLS_GOTIE12:
1017 case R_390_TLS_GOTIE20:
1018 case R_390_TLS_GOTIE32:
1019 case R_390_TLS_IEENT:
1020 case R_390_TLS_IE32:
1021 case R_390_TLS_LDM32:
1022 if (h == NULL
1023 && local_got_refcounts == NULL)
1024 {
1025 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1026 return FALSE;
1027 local_got_refcounts = elf_local_got_refcounts (abfd);
1028 }
1029 /* Fall through. */
1030 case R_390_GOTOFF16:
1031 case R_390_GOTOFF32:
1032 case R_390_GOTPC:
1033 case R_390_GOTPCDBL:
1034 if (htab->elf.sgot == NULL)
1035 {
1036 if (htab->elf.dynobj == NULL)
1037 htab->elf.dynobj = abfd;
1038 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1039 return FALSE;
1040 }
1041 }
1042
1043 if (h != NULL)
1044 {
1045 if (htab->elf.dynobj == NULL)
1046 htab->elf.dynobj = abfd;
1047 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1048 return FALSE;
1049
1050 /* Make sure an IFUNC symbol defined in a non-shared object
1051 always gets a PLT slot. */
1052 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1053 {
1054 /* The symbol is called by the dynamic loader in order
1055 to resolve the relocation. So it is in fact also
1056 referenced. */
1057 h->ref_regular = 1;
1058 h->needs_plt = 1;
1059 }
1060 }
1061 switch (r_type)
1062 {
1063 case R_390_GOTPC:
1064 case R_390_GOTPCDBL:
1065 /* These relocs do not need a GOT slot. They just load the
1066 GOT pointer itself or address something else relative to
1067 the GOT. Since the GOT pointer has been set up above we
1068 are done. */
1069 break;
1070 case R_390_GOTOFF16:
1071 case R_390_GOTOFF32:
1072 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1073 break;
1074 /* Fall through. */
1075
1076 case R_390_PLT12DBL:
1077 case R_390_PLT16DBL:
1078 case R_390_PLT24DBL:
1079 case R_390_PLT32DBL:
1080 case R_390_PLT32:
1081 case R_390_PLTOFF16:
1082 case R_390_PLTOFF32:
1083 /* This symbol requires a procedure linkage table entry. We
1084 actually build the entry in adjust_dynamic_symbol,
1085 because this might be a case of linking PIC code which is
1086 never referenced by a dynamic object, in which case we
1087 don't need to generate a procedure linkage table entry
1088 after all. */
1089
1090 /* If this is a local symbol, we resolve it directly without
1091 creating a procedure linkage table entry. */
1092 if (h != NULL)
1093 {
1094 h->needs_plt = 1;
1095 h->plt.refcount += 1;
1096 }
1097 break;
1098
1099 case R_390_GOTPLT12:
1100 case R_390_GOTPLT16:
1101 case R_390_GOTPLT20:
1102 case R_390_GOTPLT32:
1103 case R_390_GOTPLTENT:
1104 /* This symbol requires either a procedure linkage table entry
1105 or an entry in the local got. We actually build the entry
1106 in adjust_dynamic_symbol because whether this is really a
1107 global reference can change and with it the fact if we have
1108 to create a plt entry or a local got entry. To be able to
1109 make a once global symbol a local one we have to keep track
1110 of the number of gotplt references that exist for this
1111 symbol. */
1112 if (h != NULL)
1113 {
1114 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1115 h->needs_plt = 1;
1116 h->plt.refcount += 1;
1117 }
1118 else
1119 local_got_refcounts[r_symndx] += 1;
1120 break;
1121
1122 case R_390_TLS_LDM32:
1123 htab->tls_ldm_got.refcount += 1;
1124 break;
1125
1126 case R_390_TLS_IE32:
1127 case R_390_TLS_GOTIE12:
1128 case R_390_TLS_GOTIE20:
1129 case R_390_TLS_GOTIE32:
1130 case R_390_TLS_IEENT:
1131 if (bfd_link_pic (info))
1132 info->flags |= DF_STATIC_TLS;
1133 /* Fall through. */
1134
1135 case R_390_GOT12:
1136 case R_390_GOT16:
1137 case R_390_GOT20:
1138 case R_390_GOT32:
1139 case R_390_GOTENT:
1140 case R_390_TLS_GD32:
1141 /* This symbol requires a global offset table entry. */
1142 switch (r_type)
1143 {
1144 default:
1145 case R_390_GOT12:
1146 case R_390_GOT16:
1147 case R_390_GOT20:
1148 case R_390_GOT32:
1149 case R_390_GOTENT:
1150 tls_type = GOT_NORMAL;
1151 break;
1152 case R_390_TLS_GD32:
1153 tls_type = GOT_TLS_GD;
1154 break;
1155 case R_390_TLS_IE32:
1156 case R_390_TLS_GOTIE32:
1157 tls_type = GOT_TLS_IE;
1158 break;
1159 case R_390_TLS_GOTIE12:
1160 case R_390_TLS_GOTIE20:
1161 case R_390_TLS_IEENT:
1162 tls_type = GOT_TLS_IE_NLT;
1163 break;
1164 }
1165
1166 if (h != NULL)
1167 {
1168 h->got.refcount += 1;
1169 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1170 }
1171 else
1172 {
1173 local_got_refcounts[r_symndx] += 1;
1174 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1175 }
1176 /* If a TLS symbol is accessed using IE at least once,
1177 there is no point to use dynamic model for it. */
1178 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1179 {
1180 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1181 {
1182 _bfd_error_handler
1183 /* xgettext:c-format */
1184 (_("%B: `%s' accessed both as normal and thread local symbol"),
1185 abfd, h->root.root.string);
1186 return FALSE;
1187 }
1188 if (old_tls_type > tls_type)
1189 tls_type = old_tls_type;
1190 }
1191
1192 if (old_tls_type != tls_type)
1193 {
1194 if (h != NULL)
1195 elf_s390_hash_entry (h)->tls_type = tls_type;
1196 else
1197 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1198 }
1199
1200 if (r_type != R_390_TLS_IE32)
1201 break;
1202 /* Fall through. */
1203
1204 case R_390_TLS_LE32:
1205 /* For static linking and executables this reloc will be
1206 calculated at linktime otherwise a TLS_TPOFF runtime
1207 reloc will be generated. */
1208 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1209 break;
1210
1211 if (!bfd_link_pic (info))
1212 break;
1213 info->flags |= DF_STATIC_TLS;
1214 /* Fall through. */
1215
1216 case R_390_8:
1217 case R_390_16:
1218 case R_390_32:
1219 case R_390_PC16:
1220 case R_390_PC12DBL:
1221 case R_390_PC16DBL:
1222 case R_390_PC24DBL:
1223 case R_390_PC32DBL:
1224 case R_390_PC32:
1225 if (h != NULL && bfd_link_executable (info))
1226 {
1227 /* If this reloc is in a read-only section, we might
1228 need a copy reloc. We can't check reliably at this
1229 stage whether the section is read-only, as input
1230 sections have not yet been mapped to output sections.
1231 Tentatively set the flag for now, and correct in
1232 adjust_dynamic_symbol. */
1233 h->non_got_ref = 1;
1234
1235 if (!bfd_link_pic (info))
1236 {
1237 /* We may need a .plt entry if the function this reloc
1238 refers to is in a shared lib. */
1239 h->plt.refcount += 1;
1240 }
1241 }
1242
1243 /* If we are creating a shared library, and this is a reloc
1244 against a global symbol, or a non PC relative reloc
1245 against a local symbol, then we need to copy the reloc
1246 into the shared library. However, if we are linking with
1247 -Bsymbolic, we do not need to copy a reloc against a
1248 global symbol which is defined in an object we are
1249 including in the link (i.e., DEF_REGULAR is set). At
1250 this point we have not seen all the input files, so it is
1251 possible that DEF_REGULAR is not set now but will be set
1252 later (it is never cleared). In case of a weak definition,
1253 DEF_REGULAR may be cleared later by a strong definition in
1254 a shared library. We account for that possibility below by
1255 storing information in the relocs_copied field of the hash
1256 table entry. A similar situation occurs when creating
1257 shared libraries and symbol visibility changes render the
1258 symbol local.
1259
1260 If on the other hand, we are creating an executable, we
1261 may need to keep relocations for symbols satisfied by a
1262 dynamic library if we manage to avoid copy relocs for the
1263 symbol. */
1264 if ((bfd_link_pic (info)
1265 && (sec->flags & SEC_ALLOC) != 0
1266 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1267 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1268 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1269 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1270 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1272 || (h != NULL
1273 && (! SYMBOLIC_BIND (info, h)
1274 || h->root.type == bfd_link_hash_defweak
1275 || !h->def_regular))))
1276 || (ELIMINATE_COPY_RELOCS
1277 && !bfd_link_pic (info)
1278 && (sec->flags & SEC_ALLOC) != 0
1279 && h != NULL
1280 && (h->root.type == bfd_link_hash_defweak
1281 || !h->def_regular)))
1282 {
1283 struct elf_dyn_relocs *p;
1284 struct elf_dyn_relocs **head;
1285
1286 /* We must copy these reloc types into the output file.
1287 Create a reloc section in dynobj and make room for
1288 this reloc. */
1289 if (sreloc == NULL)
1290 {
1291 if (htab->elf.dynobj == NULL)
1292 htab->elf.dynobj = abfd;
1293
1294 sreloc = _bfd_elf_make_dynamic_reloc_section
1295 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1296
1297 if (sreloc == NULL)
1298 return FALSE;
1299 }
1300
1301 /* If this is a global symbol, we count the number of
1302 relocations we need for this symbol. */
1303 if (h != NULL)
1304 {
1305 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1306 }
1307 else
1308 {
1309 /* Track dynamic relocs needed for local syms too.
1310 We really need local syms available to do this
1311 easily. Oh well. */
1312 asection *s;
1313 void *vpp;
1314
1315 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1316 abfd, r_symndx);
1317 if (isym == NULL)
1318 return FALSE;
1319
1320 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1321 if (s == NULL)
1322 s = sec;
1323
1324 vpp = &elf_section_data (s)->local_dynrel;
1325 head = (struct elf_dyn_relocs **) vpp;
1326 }
1327
1328 p = *head;
1329 if (p == NULL || p->sec != sec)
1330 {
1331 bfd_size_type amt = sizeof *p;
1332
1333 p = ((struct elf_dyn_relocs *)
1334 bfd_alloc (htab->elf.dynobj, amt));
1335 if (p == NULL)
1336 return FALSE;
1337 p->next = *head;
1338 *head = p;
1339 p->sec = sec;
1340 p->count = 0;
1341 p->pc_count = 0;
1342 }
1343
1344 p->count += 1;
1345 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1346 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1347 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1348 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1349 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1351 p->pc_count += 1;
1352 }
1353 break;
1354
1355 /* This relocation describes the C++ object vtable hierarchy.
1356 Reconstruct it for later use during GC. */
1357 case R_390_GNU_VTINHERIT:
1358 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1359 return FALSE;
1360 break;
1361
1362 /* This relocation describes which C++ vtable entries are actually
1363 used. Record for later use during GC. */
1364 case R_390_GNU_VTENTRY:
1365 BFD_ASSERT (h != NULL);
1366 if (h != NULL
1367 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1368 return FALSE;
1369 break;
1370
1371 default:
1372 break;
1373 }
1374 }
1375
1376 return TRUE;
1377 }
1378
1379 /* Return the section that should be marked against GC for a given
1380 relocation. */
1381
1382 static asection *
1383 elf_s390_gc_mark_hook (asection *sec,
1384 struct bfd_link_info *info,
1385 Elf_Internal_Rela *rel,
1386 struct elf_link_hash_entry *h,
1387 Elf_Internal_Sym *sym)
1388 {
1389 if (h != NULL)
1390 switch (ELF32_R_TYPE (rel->r_info))
1391 {
1392 case R_390_GNU_VTINHERIT:
1393 case R_390_GNU_VTENTRY:
1394 return NULL;
1395 }
1396 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1397
1398 }
1399
1400 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1401 entry but we found we will not create any. Called when we find we will
1402 not have any PLT for this symbol, by for example
1403 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1404 or elf_s390_size_dynamic_sections if no dynamic sections will be
1405 created (we're only linking static objects). */
1406
1407 static void
1408 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1409 {
1410 if (h->elf.root.type == bfd_link_hash_warning)
1411 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1412
1413 if (h->gotplt_refcount <= 0)
1414 return;
1415
1416 /* We simply add the number of gotplt references to the number
1417 * of got references for this symbol. */
1418 h->elf.got.refcount += h->gotplt_refcount;
1419 h->gotplt_refcount = -1;
1420 }
1421
1422 /* Adjust a symbol defined by a dynamic object and referenced by a
1423 regular object. The current definition is in some section of the
1424 dynamic object, but we're not including those sections. We have to
1425 change the definition to something the rest of the link can
1426 understand. */
1427
1428 static bfd_boolean
1429 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1430 struct elf_link_hash_entry *h)
1431 {
1432 struct elf_s390_link_hash_table *htab;
1433 asection *s, *srel;
1434
1435 /* STT_GNU_IFUNC symbol must go through PLT. */
1436 if (s390_is_ifunc_symbol_p (h))
1437 {
1438 /* All local STT_GNU_IFUNC references must be treated as local
1439 calls via local PLT. */
1440 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1441 {
1442 bfd_size_type pc_count = 0, count = 0;
1443 struct elf_dyn_relocs **pp;
1444 struct elf_s390_link_hash_entry *eh;
1445 struct elf_dyn_relocs *p;
1446
1447 eh = (struct elf_s390_link_hash_entry *) h;
1448 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1449 {
1450 pc_count += p->pc_count;
1451 p->count -= p->pc_count;
1452 p->pc_count = 0;
1453 count += p->count;
1454 if (p->count == 0)
1455 *pp = p->next;
1456 else
1457 pp = &p->next;
1458 }
1459
1460 if (pc_count || count)
1461 {
1462 h->needs_plt = 1;
1463 h->non_got_ref = 1;
1464 if (h->plt.refcount <= 0)
1465 h->plt.refcount = 1;
1466 else
1467 h->plt.refcount += 1;
1468 }
1469 }
1470
1471 if (h->plt.refcount <= 0)
1472 {
1473 h->plt.offset = (bfd_vma) -1;
1474 h->needs_plt = 0;
1475 }
1476 return TRUE;
1477 }
1478
1479 /* If this is a function, put it in the procedure linkage table. We
1480 will fill in the contents of the procedure linkage table later
1481 (although we could actually do it here). */
1482 if (h->type == STT_FUNC
1483 || h->needs_plt)
1484 {
1485 if (h->plt.refcount <= 0
1486 || SYMBOL_CALLS_LOCAL (info, h)
1487 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1488 && h->root.type != bfd_link_hash_undefweak))
1489 {
1490 /* This case can occur if we saw a PLT32 reloc in an input
1491 file, but the symbol was never referred to by a dynamic
1492 object, or if all references were garbage collected. In
1493 such a case, we don't actually need to build a procedure
1494 linkage table, and we can just do a PC32 reloc instead. */
1495 h->plt.offset = (bfd_vma) -1;
1496 h->needs_plt = 0;
1497 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1498 }
1499
1500 return TRUE;
1501 }
1502 else
1503 /* It's possible that we incorrectly decided a .plt reloc was
1504 needed for an R_390_PC32 reloc to a non-function sym in
1505 check_relocs. We can't decide accurately between function and
1506 non-function syms in check-relocs; Objects loaded later in
1507 the link may change h->type. So fix it now. */
1508 h->plt.offset = (bfd_vma) -1;
1509
1510 /* If this is a weak symbol, and there is a real definition, the
1511 processor independent code will have arranged for us to see the
1512 real definition first, and we can just use the same value. */
1513 if (h->is_weakalias)
1514 {
1515 struct elf_link_hash_entry *def = weakdef (h);
1516 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1517 h->root.u.def.section = def->root.u.def.section;
1518 h->root.u.def.value = def->root.u.def.value;
1519 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1520 h->non_got_ref = def->non_got_ref;
1521 return TRUE;
1522 }
1523
1524 /* This is a reference to a symbol defined by a dynamic object which
1525 is not a function. */
1526
1527 /* If we are creating a shared library, we must presume that the
1528 only references to the symbol are via the global offset table.
1529 For such cases we need not do anything here; the relocations will
1530 be handled correctly by relocate_section. */
1531 if (bfd_link_pic (info))
1532 return TRUE;
1533
1534 /* If there are no references to this symbol that do not use the
1535 GOT, we don't need to generate a copy reloc. */
1536 if (!h->non_got_ref)
1537 return TRUE;
1538
1539 /* If -z nocopyreloc was given, we won't generate them either. */
1540 if (info->nocopyreloc)
1541 {
1542 h->non_got_ref = 0;
1543 return TRUE;
1544 }
1545
1546 if (ELIMINATE_COPY_RELOCS)
1547 {
1548 struct elf_s390_link_hash_entry * eh;
1549 struct elf_dyn_relocs *p;
1550
1551 eh = (struct elf_s390_link_hash_entry *) h;
1552 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1553 {
1554 s = p->sec->output_section;
1555 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1556 break;
1557 }
1558
1559 /* If we didn't find any dynamic relocs in read-only sections, then
1560 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1561 if (p == NULL)
1562 {
1563 h->non_got_ref = 0;
1564 return TRUE;
1565 }
1566 }
1567
1568 /* We must allocate the symbol in our .dynbss section, which will
1569 become part of the .bss section of the executable. There will be
1570 an entry for this symbol in the .dynsym section. The dynamic
1571 object will contain position independent code, so all references
1572 from the dynamic object to this symbol will go through the global
1573 offset table. The dynamic linker will use the .dynsym entry to
1574 determine the address it must put in the global offset table, so
1575 both the dynamic object and the regular object will refer to the
1576 same memory location for the variable. */
1577
1578 htab = elf_s390_hash_table (info);
1579
1580 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1581 copy the initial value out of the dynamic object and into the
1582 runtime process image. */
1583 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1584 {
1585 s = htab->elf.sdynrelro;
1586 srel = htab->elf.sreldynrelro;
1587 }
1588 else
1589 {
1590 s = htab->elf.sdynbss;
1591 srel = htab->elf.srelbss;
1592 }
1593 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1594 {
1595 srel->size += sizeof (Elf32_External_Rela);
1596 h->needs_copy = 1;
1597 }
1598
1599 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1600 }
1601
1602 /* Allocate space in .plt, .got and associated reloc sections for
1603 dynamic relocs. */
1604
1605 static bfd_boolean
1606 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1607 {
1608 struct bfd_link_info *info;
1609 struct elf_s390_link_hash_table *htab;
1610 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1611 struct elf_dyn_relocs *p;
1612
1613 if (h->root.type == bfd_link_hash_indirect)
1614 return TRUE;
1615
1616 info = (struct bfd_link_info *) inf;
1617 htab = elf_s390_hash_table (info);
1618
1619 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1620 here if it is defined and referenced in a non-shared object. */
1621 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1622 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1623 else if (htab->elf.dynamic_sections_created
1624 && h->plt.refcount > 0)
1625 {
1626 /* Make sure this symbol is output as a dynamic symbol.
1627 Undefined weak syms won't yet be marked as dynamic. */
1628 if (h->dynindx == -1
1629 && !h->forced_local)
1630 {
1631 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1632 return FALSE;
1633 }
1634
1635 if (bfd_link_pic (info)
1636 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1637 {
1638 asection *s = htab->elf.splt;
1639
1640 /* If this is the first .plt entry, make room for the special
1641 first entry. */
1642 if (s->size == 0)
1643 s->size += PLT_FIRST_ENTRY_SIZE;
1644
1645 h->plt.offset = s->size;
1646
1647 /* If this symbol is not defined in a regular file, and we are
1648 not generating a shared library, then set the symbol to this
1649 location in the .plt. This is required to make function
1650 pointers compare as equal between the normal executable and
1651 the shared library. */
1652 if (! bfd_link_pic (info)
1653 && !h->def_regular)
1654 {
1655 h->root.u.def.section = s;
1656 h->root.u.def.value = h->plt.offset;
1657 }
1658
1659 /* Make room for this entry. */
1660 s->size += PLT_ENTRY_SIZE;
1661
1662 /* We also need to make an entry in the .got.plt section, which
1663 will be placed in the .got section by the linker script. */
1664 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1665
1666 /* We also need to make an entry in the .rela.plt section. */
1667 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1668 }
1669 else
1670 {
1671 h->plt.offset = (bfd_vma) -1;
1672 h->needs_plt = 0;
1673 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1674 }
1675 }
1676 else
1677 {
1678 h->plt.offset = (bfd_vma) -1;
1679 h->needs_plt = 0;
1680 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1681 }
1682
1683 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1684 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1685 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1686 we can save the dynamic TLS relocation. */
1687 if (h->got.refcount > 0
1688 && !bfd_link_pic (info)
1689 && h->dynindx == -1
1690 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1691 {
1692 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1693 /* For the GOTIE access without a literal pool entry the offset has
1694 to be stored somewhere. The immediate value in the instruction
1695 is not bit enough so the value is stored in the got. */
1696 {
1697 h->got.offset = htab->elf.sgot->size;
1698 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1699 }
1700 else
1701 h->got.offset = (bfd_vma) -1;
1702 }
1703 else if (h->got.refcount > 0)
1704 {
1705 asection *s;
1706 bfd_boolean dyn;
1707 int tls_type = elf_s390_hash_entry(h)->tls_type;
1708
1709 /* Make sure this symbol is output as a dynamic symbol.
1710 Undefined weak syms won't yet be marked as dynamic. */
1711 if (h->dynindx == -1
1712 && !h->forced_local)
1713 {
1714 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1715 return FALSE;
1716 }
1717
1718 s = htab->elf.sgot;
1719 h->got.offset = s->size;
1720 s->size += GOT_ENTRY_SIZE;
1721 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1722 if (tls_type == GOT_TLS_GD)
1723 s->size += GOT_ENTRY_SIZE;
1724 dyn = htab->elf.dynamic_sections_created;
1725 /* R_390_TLS_IE32 needs one dynamic relocation,
1726 R_390_TLS_GD32 needs one if local symbol and two if global. */
1727 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1728 || tls_type >= GOT_TLS_IE)
1729 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1730 else if (tls_type == GOT_TLS_GD)
1731 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1732 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1733 || h->root.type != bfd_link_hash_undefweak)
1734 && (bfd_link_pic (info)
1735 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1736 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1737 }
1738 else
1739 h->got.offset = (bfd_vma) -1;
1740
1741 if (eh->dyn_relocs == NULL)
1742 return TRUE;
1743
1744 /* In the shared -Bsymbolic case, discard space allocated for
1745 dynamic pc-relative relocs against symbols which turn out to be
1746 defined in regular objects. For the normal shared case, discard
1747 space for pc-relative relocs that have become local due to symbol
1748 visibility changes. */
1749
1750 if (bfd_link_pic (info))
1751 {
1752 if (SYMBOL_CALLS_LOCAL (info, h))
1753 {
1754 struct elf_dyn_relocs **pp;
1755
1756 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1757 {
1758 p->count -= p->pc_count;
1759 p->pc_count = 0;
1760 if (p->count == 0)
1761 *pp = p->next;
1762 else
1763 pp = &p->next;
1764 }
1765 }
1766
1767 /* Also discard relocs on undefined weak syms with non-default
1768 visibility. */
1769 if (eh->dyn_relocs != NULL
1770 && h->root.type == bfd_link_hash_undefweak)
1771 {
1772 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1773 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1774 eh->dyn_relocs = NULL;
1775
1776 /* Make sure undefined weak symbols are output as a dynamic
1777 symbol in PIEs. */
1778 else if (h->dynindx == -1
1779 && !h->forced_local)
1780 {
1781 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1782 return FALSE;
1783 }
1784 }
1785 }
1786 else if (ELIMINATE_COPY_RELOCS)
1787 {
1788 /* For the non-shared case, discard space for relocs against
1789 symbols which turn out to need copy relocs or are not
1790 dynamic. */
1791
1792 if (!h->non_got_ref
1793 && ((h->def_dynamic
1794 && !h->def_regular)
1795 || (htab->elf.dynamic_sections_created
1796 && (h->root.type == bfd_link_hash_undefweak
1797 || h->root.type == bfd_link_hash_undefined))))
1798 {
1799 /* Make sure this symbol is output as a dynamic symbol.
1800 Undefined weak syms won't yet be marked as dynamic. */
1801 if (h->dynindx == -1
1802 && !h->forced_local)
1803 {
1804 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1805 return FALSE;
1806 }
1807
1808 /* If that succeeded, we know we'll be keeping all the
1809 relocs. */
1810 if (h->dynindx != -1)
1811 goto keep;
1812 }
1813
1814 eh->dyn_relocs = NULL;
1815
1816 keep: ;
1817 }
1818
1819 /* Finally, allocate space. */
1820 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1821 {
1822 asection *sreloc = elf_section_data (p->sec)->sreloc;
1823
1824 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1825 }
1826
1827 return TRUE;
1828 }
1829
1830 /* Find any dynamic relocs that apply to read-only sections. */
1831
1832 static bfd_boolean
1833 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1834 {
1835 struct elf_s390_link_hash_entry *eh;
1836 struct elf_dyn_relocs *p;
1837
1838 eh = (struct elf_s390_link_hash_entry *) h;
1839 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1840 {
1841 asection *s = p->sec->output_section;
1842
1843 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1844 {
1845 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1846
1847 info->flags |= DF_TEXTREL;
1848
1849 /* Not an error, just cut short the traversal. */
1850 return FALSE;
1851 }
1852 }
1853 return TRUE;
1854 }
1855
1856 /* Set the sizes of the dynamic sections. */
1857
1858 static bfd_boolean
1859 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1860 struct bfd_link_info *info)
1861 {
1862 struct elf_s390_link_hash_table *htab;
1863 bfd *dynobj;
1864 asection *s;
1865 bfd_boolean relocs;
1866 bfd *ibfd;
1867
1868 htab = elf_s390_hash_table (info);
1869 dynobj = htab->elf.dynobj;
1870 if (dynobj == NULL)
1871 abort ();
1872
1873 if (htab->elf.dynamic_sections_created)
1874 {
1875 /* Set the contents of the .interp section to the interpreter. */
1876 if (bfd_link_executable (info) && !info->nointerp)
1877 {
1878 s = bfd_get_linker_section (dynobj, ".interp");
1879 if (s == NULL)
1880 abort ();
1881 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1882 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1883 }
1884 }
1885
1886 /* Set up .got offsets for local syms, and space for local dynamic
1887 relocs. */
1888 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1889 {
1890 bfd_signed_vma *local_got;
1891 bfd_signed_vma *end_local_got;
1892 char *local_tls_type;
1893 bfd_size_type locsymcount;
1894 Elf_Internal_Shdr *symtab_hdr;
1895 asection *srela;
1896 struct plt_entry *local_plt;
1897 unsigned int i;
1898
1899 if (! is_s390_elf (ibfd))
1900 continue;
1901
1902 for (s = ibfd->sections; s != NULL; s = s->next)
1903 {
1904 struct elf_dyn_relocs *p;
1905
1906 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1907 {
1908 if (!bfd_is_abs_section (p->sec)
1909 && bfd_is_abs_section (p->sec->output_section))
1910 {
1911 /* Input section has been discarded, either because
1912 it is a copy of a linkonce section or due to
1913 linker script /DISCARD/, so we'll be discarding
1914 the relocs too. */
1915 }
1916 else if (p->count != 0)
1917 {
1918 srela = elf_section_data (p->sec)->sreloc;
1919 srela->size += p->count * sizeof (Elf32_External_Rela);
1920 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1921 info->flags |= DF_TEXTREL;
1922 }
1923 }
1924 }
1925
1926 local_got = elf_local_got_refcounts (ibfd);
1927 if (!local_got)
1928 continue;
1929
1930 symtab_hdr = &elf_symtab_hdr (ibfd);
1931 locsymcount = symtab_hdr->sh_info;
1932 end_local_got = local_got + locsymcount;
1933 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1934 s = htab->elf.sgot;
1935 srela = htab->elf.srelgot;
1936 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1937 {
1938 if (*local_got > 0)
1939 {
1940 *local_got = s->size;
1941 s->size += GOT_ENTRY_SIZE;
1942 if (*local_tls_type == GOT_TLS_GD)
1943 s->size += GOT_ENTRY_SIZE;
1944 if (bfd_link_pic (info))
1945 srela->size += sizeof (Elf32_External_Rela);
1946 }
1947 else
1948 *local_got = (bfd_vma) -1;
1949 }
1950 local_plt = elf_s390_local_plt (ibfd);
1951 for (i = 0; i < symtab_hdr->sh_info; i++)
1952 {
1953 if (local_plt[i].plt.refcount > 0)
1954 {
1955 local_plt[i].plt.offset = htab->elf.iplt->size;
1956 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1957 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1958 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1959 }
1960 else
1961 local_plt[i].plt.offset = (bfd_vma) -1;
1962 }
1963 }
1964
1965 if (htab->tls_ldm_got.refcount > 0)
1966 {
1967 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1968 relocs. */
1969 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1970 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1971 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1972 }
1973 else
1974 htab->tls_ldm_got.offset = -1;
1975
1976 /* Allocate global sym .plt and .got entries, and space for global
1977 sym dynamic relocs. */
1978 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1979
1980 /* We now have determined the sizes of the various dynamic sections.
1981 Allocate memory for them. */
1982 relocs = FALSE;
1983 for (s = dynobj->sections; s != NULL; s = s->next)
1984 {
1985 if ((s->flags & SEC_LINKER_CREATED) == 0)
1986 continue;
1987
1988 if (s == htab->elf.splt
1989 || s == htab->elf.sgot
1990 || s == htab->elf.sgotplt
1991 || s == htab->elf.sdynbss
1992 || s == htab->elf.sdynrelro
1993 || s == htab->elf.iplt
1994 || s == htab->elf.igotplt
1995 || s == htab->irelifunc)
1996 {
1997 /* Strip this section if we don't need it; see the
1998 comment below. */
1999 }
2000 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2001 {
2002 if (s->size != 0)
2003 relocs = TRUE;
2004
2005 /* We use the reloc_count field as a counter if we need
2006 to copy relocs into the output file. */
2007 s->reloc_count = 0;
2008 }
2009 else
2010 {
2011 /* It's not one of our sections, so don't allocate space. */
2012 continue;
2013 }
2014
2015 if (s->size == 0)
2016 {
2017 /* If we don't need this section, strip it from the
2018 output file. This is to handle .rela.bss and
2019 .rela.plt. We must create it in
2020 create_dynamic_sections, because it must be created
2021 before the linker maps input sections to output
2022 sections. The linker does that before
2023 adjust_dynamic_symbol is called, and it is that
2024 function which decides whether anything needs to go
2025 into these sections. */
2026
2027 s->flags |= SEC_EXCLUDE;
2028 continue;
2029 }
2030
2031 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2032 continue;
2033
2034 /* Allocate memory for the section contents. We use bfd_zalloc
2035 here in case unused entries are not reclaimed before the
2036 section's contents are written out. This should not happen,
2037 but this way if it does, we get a R_390_NONE reloc instead
2038 of garbage. */
2039 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2040 if (s->contents == NULL)
2041 return FALSE;
2042 }
2043
2044 if (htab->elf.dynamic_sections_created)
2045 {
2046 /* Add some entries to the .dynamic section. We fill in the
2047 values later, in elf_s390_finish_dynamic_sections, but we
2048 must add the entries now so that we get the correct size for
2049 the .dynamic section. The DT_DEBUG entry is filled in by the
2050 dynamic linker and used by the debugger. */
2051 #define add_dynamic_entry(TAG, VAL) \
2052 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2053
2054 if (bfd_link_executable (info))
2055 {
2056 if (!add_dynamic_entry (DT_DEBUG, 0))
2057 return FALSE;
2058 }
2059
2060 if (htab->elf.splt->size != 0)
2061 {
2062 if (!add_dynamic_entry (DT_PLTGOT, 0)
2063 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2064 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2065 || !add_dynamic_entry (DT_JMPREL, 0))
2066 return FALSE;
2067 }
2068
2069 if (relocs)
2070 {
2071 if (!add_dynamic_entry (DT_RELA, 0)
2072 || !add_dynamic_entry (DT_RELASZ, 0)
2073 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2074 return FALSE;
2075
2076 /* If any dynamic relocs apply to a read-only section,
2077 then we need a DT_TEXTREL entry. */
2078 if ((info->flags & DF_TEXTREL) == 0)
2079 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2080
2081 if ((info->flags & DF_TEXTREL) != 0)
2082 {
2083 if (!add_dynamic_entry (DT_TEXTREL, 0))
2084 return FALSE;
2085 }
2086 }
2087 }
2088 #undef add_dynamic_entry
2089
2090 return TRUE;
2091 }
2092
2093 /* Return the base VMA address which should be subtracted from real addresses
2094 when resolving @dtpoff relocation.
2095 This is PT_TLS segment p_vaddr. */
2096
2097 static bfd_vma
2098 dtpoff_base (struct bfd_link_info *info)
2099 {
2100 /* If tls_sec is NULL, we should have signalled an error already. */
2101 if (elf_hash_table (info)->tls_sec == NULL)
2102 return 0;
2103 return elf_hash_table (info)->tls_sec->vma;
2104 }
2105
2106 /* Return the relocation value for @tpoff relocation
2107 if STT_TLS virtual address is ADDRESS. */
2108
2109 static bfd_vma
2110 tpoff (struct bfd_link_info *info, bfd_vma address)
2111 {
2112 struct elf_link_hash_table *htab = elf_hash_table (info);
2113
2114 /* If tls_sec is NULL, we should have signalled an error already. */
2115 if (htab->tls_sec == NULL)
2116 return 0;
2117 return htab->tls_size + htab->tls_sec->vma - address;
2118 }
2119
2120 /* Complain if TLS instruction relocation is against an invalid
2121 instruction. */
2122
2123 static void
2124 invalid_tls_insn (bfd *input_bfd,
2125 asection *input_section,
2126 Elf_Internal_Rela *rel)
2127 {
2128 reloc_howto_type *howto;
2129
2130 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2131 _bfd_error_handler
2132 /* xgettext:c-format */
2133 (_("%B(%A+%#Lx): invalid instruction for TLS relocation %s"),
2134 input_bfd,
2135 input_section,
2136 rel->r_offset,
2137 howto->name);
2138 bfd_set_error (bfd_error_bad_value);
2139 }
2140
2141 /* Relocate a 390 ELF section. */
2142
2143 static bfd_boolean
2144 elf_s390_relocate_section (bfd *output_bfd,
2145 struct bfd_link_info *info,
2146 bfd *input_bfd,
2147 asection *input_section,
2148 bfd_byte *contents,
2149 Elf_Internal_Rela *relocs,
2150 Elf_Internal_Sym *local_syms,
2151 asection **local_sections)
2152 {
2153 struct elf_s390_link_hash_table *htab;
2154 Elf_Internal_Shdr *symtab_hdr;
2155 struct elf_link_hash_entry **sym_hashes;
2156 bfd_vma *local_got_offsets;
2157 Elf_Internal_Rela *rel;
2158 Elf_Internal_Rela *relend;
2159
2160 BFD_ASSERT (is_s390_elf (input_bfd));
2161
2162 htab = elf_s390_hash_table (info);
2163 symtab_hdr = &elf_symtab_hdr (input_bfd);
2164 sym_hashes = elf_sym_hashes (input_bfd);
2165 local_got_offsets = elf_local_got_offsets (input_bfd);
2166
2167 rel = relocs;
2168 relend = relocs + input_section->reloc_count;
2169 for (; rel < relend; rel++)
2170 {
2171 unsigned int r_type;
2172 reloc_howto_type *howto;
2173 unsigned long r_symndx;
2174 struct elf_link_hash_entry *h;
2175 Elf_Internal_Sym *sym;
2176 asection *sec;
2177 bfd_vma off;
2178 bfd_vma relocation;
2179 bfd_boolean unresolved_reloc;
2180 bfd_reloc_status_type r;
2181 int tls_type;
2182 asection *base_got = htab->elf.sgot;
2183 bfd_boolean resolved_to_zero;
2184
2185 r_type = ELF32_R_TYPE (rel->r_info);
2186 if (r_type == (int) R_390_GNU_VTINHERIT
2187 || r_type == (int) R_390_GNU_VTENTRY)
2188 continue;
2189 if (r_type >= (int) R_390_max)
2190 {
2191 bfd_set_error (bfd_error_bad_value);
2192 return FALSE;
2193 }
2194
2195 howto = elf_howto_table + r_type;
2196 r_symndx = ELF32_R_SYM (rel->r_info);
2197
2198 h = NULL;
2199 sym = NULL;
2200 sec = NULL;
2201 unresolved_reloc = FALSE;
2202 if (r_symndx < symtab_hdr->sh_info)
2203 {
2204 sym = local_syms + r_symndx;
2205 sec = local_sections[r_symndx];
2206 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2207 {
2208 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2209 if (local_plt == NULL)
2210 return FALSE;
2211
2212 /* Address of the PLT slot. */
2213 relocation = (htab->elf.iplt->output_section->vma
2214 + htab->elf.iplt->output_offset
2215 + local_plt[r_symndx].plt.offset);
2216
2217 switch (r_type)
2218 {
2219 case R_390_PLTOFF16:
2220 case R_390_PLTOFF32:
2221 relocation -= htab->elf.sgot->output_section->vma;
2222 break;
2223 case R_390_GOTPLT12:
2224 case R_390_GOTPLT16:
2225 case R_390_GOTPLT20:
2226 case R_390_GOTPLT32:
2227 case R_390_GOTPLTENT:
2228 case R_390_GOT12:
2229 case R_390_GOT16:
2230 case R_390_GOT20:
2231 case R_390_GOT32:
2232 case R_390_GOTENT:
2233 {
2234 /* Write the PLT slot address into the GOT slot. */
2235 bfd_put_32 (output_bfd, relocation,
2236 htab->elf.sgot->contents +
2237 local_got_offsets[r_symndx]);
2238 relocation = (local_got_offsets[r_symndx] +
2239 htab->elf.sgot->output_offset);
2240
2241 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2242 relocation += htab->elf.sgot->output_section->vma;
2243 break;
2244 }
2245 default:
2246 break;
2247 }
2248 /* The output section is needed later in
2249 finish_dynamic_section when creating the dynamic
2250 relocation. */
2251 local_plt[r_symndx].sec = sec;
2252 goto do_relocation;
2253 }
2254 else
2255 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2256 }
2257 else
2258 {
2259 bfd_boolean warned ATTRIBUTE_UNUSED;
2260 bfd_boolean ignored ATTRIBUTE_UNUSED;
2261
2262 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2263 r_symndx, symtab_hdr, sym_hashes,
2264 h, sec, relocation,
2265 unresolved_reloc, warned, ignored);
2266 }
2267
2268 if (sec != NULL && discarded_section (sec))
2269 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2270 rel, 1, relend, howto, 0, contents);
2271
2272 if (bfd_link_relocatable (info))
2273 continue;
2274
2275 resolved_to_zero = (h != NULL
2276 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2277
2278 switch (r_type)
2279 {
2280 case R_390_GOTPLT12:
2281 case R_390_GOTPLT16:
2282 case R_390_GOTPLT20:
2283 case R_390_GOTPLT32:
2284 case R_390_GOTPLTENT:
2285 /* There are three cases for a GOTPLT relocation. 1) The
2286 relocation is against the jump slot entry of a plt that
2287 will get emitted to the output file. 2) The relocation
2288 is against the jump slot of a plt entry that has been
2289 removed. elf_s390_adjust_gotplt has created a GOT entry
2290 as replacement. 3) The relocation is against a local symbol.
2291 Cases 2) and 3) are the same as the GOT relocation code
2292 so we just have to test for case 1 and fall through for
2293 the other two. */
2294 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2295 {
2296 bfd_vma plt_index;
2297
2298 if (s390_is_ifunc_symbol_p (h))
2299 {
2300 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2301 relocation = (plt_index * GOT_ENTRY_SIZE +
2302 htab->elf.igotplt->output_offset);
2303 if (r_type == R_390_GOTPLTENT)
2304 relocation += htab->elf.igotplt->output_section->vma;
2305 }
2306 else
2307 {
2308 /* Calc. index no.
2309 Current offset - size first entry / entry size. */
2310 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2311 PLT_ENTRY_SIZE;
2312
2313 /* Offset in GOT is PLT index plus GOT headers(3)
2314 times 4, addr & GOT addr. */
2315 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2316 if (r_type == R_390_GOTPLTENT)
2317 relocation += htab->elf.sgot->output_section->vma;
2318 }
2319 unresolved_reloc = FALSE;
2320
2321 }
2322 /* Fall through. */
2323
2324 case R_390_GOT12:
2325 case R_390_GOT16:
2326 case R_390_GOT20:
2327 case R_390_GOT32:
2328 case R_390_GOTENT:
2329 /* Relocation is to the entry for this symbol in the global
2330 offset table. */
2331 if (base_got == NULL)
2332 abort ();
2333
2334 if (h != NULL)
2335 {
2336 bfd_boolean dyn;
2337
2338 off = h->got.offset;
2339 dyn = htab->elf.dynamic_sections_created;
2340
2341 if (s390_is_ifunc_symbol_p (h))
2342 {
2343 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2344 if (off == (bfd_vma)-1)
2345 {
2346 /* No explicit GOT usage so redirect to the
2347 got.iplt slot. */
2348 base_got = htab->elf.igotplt;
2349 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2350 }
2351 else
2352 {
2353 /* Explicit GOT slots must contain the address
2354 of the PLT slot. This will be handled in
2355 finish_dynamic_symbol. */
2356 }
2357 }
2358 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2359 bfd_link_pic (info),
2360 h)
2361 || (bfd_link_pic (info)
2362 && SYMBOL_REFERENCES_LOCAL (info, h))
2363 || (ELF_ST_VISIBILITY (h->other)
2364 && h->root.type == bfd_link_hash_undefweak))
2365
2366 {
2367 /* This is actually a static link, or it is a
2368 -Bsymbolic link and the symbol is defined
2369 locally, or the symbol was forced to be local
2370 because of a version file. We must initialize
2371 this entry in the global offset table. Since the
2372 offset must always be a multiple of 2, we use the
2373 least significant bit to record whether we have
2374 initialized it already.
2375
2376 When doing a dynamic link, we create a .rel.got
2377 relocation entry to initialize the value. This
2378 is done in the finish_dynamic_symbol routine. */
2379 if ((off & 1) != 0)
2380 off &= ~1;
2381 else
2382 {
2383 bfd_put_32 (output_bfd, relocation,
2384 base_got->contents + off);
2385 h->got.offset |= 1;
2386 }
2387
2388 if ((h->def_regular
2389 && bfd_link_pic (info)
2390 && SYMBOL_REFERENCES_LOCAL (info, h))
2391 /* lrl rx,sym@GOTENT -> larl rx, sym */
2392 && ((r_type == R_390_GOTENT
2393 && (bfd_get_16 (input_bfd,
2394 contents + rel->r_offset - 2)
2395 & 0xff0f) == 0xc40d)
2396 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2397 || (r_type == R_390_GOT20
2398 && (bfd_get_32 (input_bfd,
2399 contents + rel->r_offset - 2)
2400 & 0xff00f000) == 0xe300c000
2401 && bfd_get_8 (input_bfd,
2402 contents + rel->r_offset + 3) == 0x58)))
2403 {
2404 unsigned short new_insn =
2405 (0xc000 | (bfd_get_8 (input_bfd,
2406 contents + rel->r_offset - 1) & 0xf0));
2407 bfd_put_16 (output_bfd, new_insn,
2408 contents + rel->r_offset - 2);
2409 r_type = R_390_PC32DBL;
2410 rel->r_addend = 2;
2411 howto = elf_howto_table + r_type;
2412 relocation = h->root.u.def.value
2413 + h->root.u.def.section->output_section->vma
2414 + h->root.u.def.section->output_offset;
2415 goto do_relocation;
2416 }
2417 }
2418 else
2419 unresolved_reloc = FALSE;
2420 }
2421 else
2422 {
2423 if (local_got_offsets == NULL)
2424 abort ();
2425
2426 off = local_got_offsets[r_symndx];
2427
2428 /* The offset must always be a multiple of 4. We use
2429 the least significant bit to record whether we have
2430 already generated the necessary reloc. */
2431 if ((off & 1) != 0)
2432 off &= ~1;
2433 else
2434 {
2435 bfd_put_32 (output_bfd, relocation,
2436 htab->elf.sgot->contents + off);
2437
2438 if (bfd_link_pic (info))
2439 {
2440 asection *srelgot;
2441 Elf_Internal_Rela outrel;
2442 bfd_byte *loc;
2443
2444 srelgot = htab->elf.srelgot;
2445 if (srelgot == NULL)
2446 abort ();
2447
2448 outrel.r_offset = (htab->elf.sgot->output_section->vma
2449 + htab->elf.sgot->output_offset
2450 + off);
2451 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2452 outrel.r_addend = relocation;
2453 loc = srelgot->contents;
2454 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2455 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2456 }
2457
2458 local_got_offsets[r_symndx] |= 1;
2459 }
2460 }
2461
2462 if (off >= (bfd_vma) -2)
2463 abort ();
2464
2465 relocation = base_got->output_offset + off;
2466
2467 /* For @GOTENT the relocation is against the offset between
2468 the instruction and the symbols entry in the GOT and not
2469 between the start of the GOT and the symbols entry. We
2470 add the vma of the GOT to get the correct value. */
2471 if ( r_type == R_390_GOTENT
2472 || r_type == R_390_GOTPLTENT)
2473 relocation += base_got->output_section->vma;
2474
2475 break;
2476
2477 case R_390_GOTOFF16:
2478 case R_390_GOTOFF32:
2479 /* Relocation is relative to the start of the global offset
2480 table. */
2481
2482 if (h != NULL
2483 && s390_is_ifunc_symbol_p (h)
2484 && h->def_regular
2485 && !bfd_link_executable (info))
2486 {
2487 relocation = (htab->elf.iplt->output_section->vma
2488 + htab->elf.iplt->output_offset
2489 + h->plt.offset
2490 - htab->elf.sgot->output_section->vma);
2491 goto do_relocation;
2492 }
2493
2494 /* Note that sgot->output_offset is not involved in this
2495 calculation. We always want the start of .got. If we
2496 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2497 permitted by the ABI, we might have to change this
2498 calculation. */
2499 relocation -= htab->elf.sgot->output_section->vma;
2500 break;
2501
2502 case R_390_GOTPC:
2503 case R_390_GOTPCDBL:
2504 /* Use global offset table as symbol value. */
2505 relocation = htab->elf.sgot->output_section->vma;
2506 unresolved_reloc = FALSE;
2507 break;
2508
2509 case R_390_PLT12DBL:
2510 case R_390_PLT16DBL:
2511 case R_390_PLT24DBL:
2512 case R_390_PLT32DBL:
2513 case R_390_PLT32:
2514 /* Relocation is to the entry for this symbol in the
2515 procedure linkage table. */
2516
2517 /* Resolve a PLT32 reloc against a local symbol directly,
2518 without using the procedure linkage table. */
2519 if (h == NULL)
2520 break;
2521
2522 if (h->plt.offset == (bfd_vma) -1
2523 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2524 {
2525 /* We didn't make a PLT entry for this symbol. This
2526 happens when statically linking PIC code, or when
2527 using -Bsymbolic. */
2528 break;
2529 }
2530
2531 if (s390_is_ifunc_symbol_p (h))
2532 relocation = (htab->elf.iplt->output_section->vma
2533 + htab->elf.iplt->output_offset
2534 + h->plt.offset);
2535 else
2536 relocation = (htab->elf.splt->output_section->vma
2537 + htab->elf.splt->output_offset
2538 + h->plt.offset);
2539 unresolved_reloc = FALSE;
2540 break;
2541
2542 case R_390_PLTOFF16:
2543 case R_390_PLTOFF32:
2544 /* Relocation is to the entry for this symbol in the
2545 procedure linkage table relative to the start of the GOT. */
2546
2547 /* For local symbols or if we didn't make a PLT entry for
2548 this symbol resolve the symbol directly. */
2549 if (h == NULL
2550 || h->plt.offset == (bfd_vma) -1
2551 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2552 {
2553 relocation -= htab->elf.sgot->output_section->vma;
2554 break;
2555 }
2556
2557 if (s390_is_ifunc_symbol_p (h))
2558 relocation = (htab->elf.iplt->output_section->vma
2559 + htab->elf.iplt->output_offset
2560 + h->plt.offset
2561 - htab->elf.sgot->output_section->vma);
2562 else
2563 relocation = (htab->elf.splt->output_section->vma
2564 + htab->elf.splt->output_offset
2565 + h->plt.offset
2566 - htab->elf.sgot->output_section->vma);
2567 unresolved_reloc = FALSE;
2568 break;
2569
2570 case R_390_PC16:
2571 case R_390_PC12DBL:
2572 case R_390_PC16DBL:
2573 case R_390_PC24DBL:
2574 case R_390_PC32DBL:
2575 case R_390_PC32:
2576 if (h != NULL
2577 && s390_is_ifunc_symbol_p (h)
2578 && h->def_regular
2579 && !bfd_link_executable (info))
2580 {
2581 /* This will not work our if the function does not
2582 happen to set up the GOT pointer for some other
2583 reason. 31 bit PLT entries require r12 to hold the
2584 GOT pointer.
2585 FIXME: Implement an errorcheck.
2586 NOTE: It will work when brasl is not available
2587 (e.g. with -m31 -march=g5) since a local function
2588 call then does use GOTOFF which implies r12 being set
2589 up. */
2590 relocation = (htab->elf.iplt->output_section->vma
2591 + htab->elf.iplt->output_offset
2592 + h ->plt.offset);
2593 goto do_relocation;
2594 }
2595 /* Fall through. */
2596
2597 case R_390_8:
2598 case R_390_16:
2599 case R_390_32:
2600 if (h != NULL
2601 && s390_is_ifunc_symbol_p (h)
2602 && h->def_regular)
2603 {
2604 if (!bfd_link_pic (info))
2605 {
2606 /* For a non-shared object STT_GNU_IFUNC symbol must
2607 go through PLT. */
2608 relocation = (htab->elf.iplt->output_section->vma
2609 + htab->elf.iplt->output_offset
2610 + h ->plt.offset);
2611 goto do_relocation;
2612 }
2613 else
2614 {
2615 /* For shared objects a runtime relocation is needed. */
2616
2617 Elf_Internal_Rela outrel;
2618 asection *sreloc;
2619
2620 /* Need a dynamic relocation to get the real function
2621 address. */
2622 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2623 info,
2624 input_section,
2625 rel->r_offset);
2626 if (outrel.r_offset == (bfd_vma) -1
2627 || outrel.r_offset == (bfd_vma) -2)
2628 abort ();
2629
2630 outrel.r_offset += (input_section->output_section->vma
2631 + input_section->output_offset);
2632
2633 if (h->dynindx == -1
2634 || h->forced_local
2635 || bfd_link_executable (info))
2636 {
2637 /* This symbol is resolved locally. */
2638 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2639 outrel.r_addend = (h->root.u.def.value
2640 + h->root.u.def.section->output_section->vma
2641 + h->root.u.def.section->output_offset);
2642 }
2643 else
2644 {
2645 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2646 outrel.r_addend = 0;
2647 }
2648
2649 sreloc = htab->elf.irelifunc;
2650 elf_append_rela (output_bfd, sreloc, &outrel);
2651
2652 /* If this reloc is against an external symbol, we
2653 do not want to fiddle with the addend. Otherwise,
2654 we need to include the symbol value so that it
2655 becomes an addend for the dynamic reloc. For an
2656 internal symbol, we have updated addend. */
2657 continue;
2658 }
2659 }
2660
2661 if ((input_section->flags & SEC_ALLOC) == 0)
2662 break;
2663
2664 if ((bfd_link_pic (info)
2665 && (h == NULL
2666 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2667 && !resolved_to_zero)
2668 || h->root.type != bfd_link_hash_undefweak)
2669 && ((r_type != R_390_PC16
2670 && r_type != R_390_PC12DBL
2671 && r_type != R_390_PC16DBL
2672 && r_type != R_390_PC24DBL
2673 && r_type != R_390_PC32DBL
2674 && r_type != R_390_PC32)
2675 || !SYMBOL_CALLS_LOCAL (info, h)))
2676 || (ELIMINATE_COPY_RELOCS
2677 && !bfd_link_pic (info)
2678 && h != NULL
2679 && h->dynindx != -1
2680 && !h->non_got_ref
2681 && ((h->def_dynamic
2682 && !h->def_regular)
2683 || h->root.type == bfd_link_hash_undefweak
2684 || h->root.type == bfd_link_hash_undefined)))
2685 {
2686 Elf_Internal_Rela outrel;
2687 bfd_boolean skip, relocate;
2688 asection *sreloc;
2689 bfd_byte *loc;
2690
2691 /* When generating a shared object, these relocations
2692 are copied into the output file to be resolved at run
2693 time. */
2694
2695 skip = FALSE;
2696 relocate = FALSE;
2697
2698 outrel.r_offset =
2699 _bfd_elf_section_offset (output_bfd, info, input_section,
2700 rel->r_offset);
2701 if (outrel.r_offset == (bfd_vma) -1)
2702 skip = TRUE;
2703 else if (outrel.r_offset == (bfd_vma) -2)
2704 skip = TRUE, relocate = TRUE;
2705 outrel.r_offset += (input_section->output_section->vma
2706 + input_section->output_offset);
2707
2708 if (skip)
2709 memset (&outrel, 0, sizeof outrel);
2710 else if (h != NULL
2711 && h->dynindx != -1
2712 && (r_type == R_390_PC16
2713 || r_type == R_390_PC12DBL
2714 || r_type == R_390_PC16DBL
2715 || r_type == R_390_PC24DBL
2716 || r_type == R_390_PC32DBL
2717 || r_type == R_390_PC32
2718 || !bfd_link_pic (info)
2719 || !SYMBOLIC_BIND (info, h)
2720 || !h->def_regular))
2721 {
2722 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2723 outrel.r_addend = rel->r_addend;
2724 }
2725 else
2726 {
2727 /* This symbol is local, or marked to become local. */
2728 outrel.r_addend = relocation + rel->r_addend;
2729 if (r_type == R_390_32)
2730 {
2731 relocate = TRUE;
2732 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2733 }
2734 else
2735 {
2736 long sindx;
2737
2738 if (bfd_is_abs_section (sec))
2739 sindx = 0;
2740 else if (sec == NULL || sec->owner == NULL)
2741 {
2742 bfd_set_error(bfd_error_bad_value);
2743 return FALSE;
2744 }
2745 else
2746 {
2747 asection *osec;
2748
2749 osec = sec->output_section;
2750 sindx = elf_section_data (osec)->dynindx;
2751 if (sindx == 0)
2752 {
2753 osec = htab->elf.text_index_section;
2754 sindx = elf_section_data (osec)->dynindx;
2755 }
2756 BFD_ASSERT (sindx != 0);
2757
2758 /* We are turning this relocation into one
2759 against a section symbol, so subtract out
2760 the output section's address but not the
2761 offset of the input section in the output
2762 section. */
2763 outrel.r_addend -= osec->vma;
2764 }
2765 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2766 }
2767 }
2768
2769 sreloc = elf_section_data (input_section)->sreloc;
2770 if (sreloc == NULL)
2771 abort ();
2772
2773 loc = sreloc->contents;
2774 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2775 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2776
2777 /* If this reloc is against an external symbol, we do
2778 not want to fiddle with the addend. Otherwise, we
2779 need to include the symbol value so that it becomes
2780 an addend for the dynamic reloc. */
2781 if (! relocate)
2782 continue;
2783 }
2784 break;
2785
2786 /* Relocations for tls literal pool entries. */
2787 case R_390_TLS_IE32:
2788 if (bfd_link_pic (info))
2789 {
2790 Elf_Internal_Rela outrel;
2791 asection *sreloc;
2792 bfd_byte *loc;
2793
2794 outrel.r_offset = rel->r_offset
2795 + input_section->output_section->vma
2796 + input_section->output_offset;
2797 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2798 sreloc = elf_section_data (input_section)->sreloc;
2799 if (sreloc == NULL)
2800 abort ();
2801 loc = sreloc->contents;
2802 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2803 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2804 }
2805 /* Fall through. */
2806
2807 case R_390_TLS_GD32:
2808 case R_390_TLS_GOTIE32:
2809 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2810 tls_type = GOT_UNKNOWN;
2811 if (h == NULL && local_got_offsets)
2812 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2813 else if (h != NULL)
2814 {
2815 tls_type = elf_s390_hash_entry(h)->tls_type;
2816 if (!bfd_link_pic (info)
2817 && h->dynindx == -1
2818 && tls_type >= GOT_TLS_IE)
2819 r_type = R_390_TLS_LE32;
2820 }
2821 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2822 r_type = R_390_TLS_IE32;
2823
2824 if (r_type == R_390_TLS_LE32)
2825 {
2826 /* This relocation gets optimized away by the local exec
2827 access optimization. */
2828 BFD_ASSERT (! unresolved_reloc);
2829 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2830 contents + rel->r_offset);
2831 continue;
2832 }
2833
2834 if (htab->elf.sgot == NULL)
2835 abort ();
2836
2837 if (h != NULL)
2838 off = h->got.offset;
2839 else
2840 {
2841 if (local_got_offsets == NULL)
2842 abort ();
2843
2844 off = local_got_offsets[r_symndx];
2845 }
2846
2847 emit_tls_relocs:
2848
2849 if ((off & 1) != 0)
2850 off &= ~1;
2851 else
2852 {
2853 Elf_Internal_Rela outrel;
2854 bfd_byte *loc;
2855 int dr_type, indx;
2856
2857 if (htab->elf.srelgot == NULL)
2858 abort ();
2859
2860 outrel.r_offset = (htab->elf.sgot->output_section->vma
2861 + htab->elf.sgot->output_offset + off);
2862
2863 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2864 if (r_type == R_390_TLS_GD32)
2865 dr_type = R_390_TLS_DTPMOD;
2866 else
2867 dr_type = R_390_TLS_TPOFF;
2868 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2869 outrel.r_addend = relocation - dtpoff_base (info);
2870 else
2871 outrel.r_addend = 0;
2872 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2873 loc = htab->elf.srelgot->contents;
2874 loc += htab->elf.srelgot->reloc_count++
2875 * sizeof (Elf32_External_Rela);
2876 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2877
2878 if (r_type == R_390_TLS_GD32)
2879 {
2880 if (indx == 0)
2881 {
2882 BFD_ASSERT (! unresolved_reloc);
2883 bfd_put_32 (output_bfd,
2884 relocation - dtpoff_base (info),
2885 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2886 }
2887 else
2888 {
2889 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2890 outrel.r_offset += GOT_ENTRY_SIZE;
2891 outrel.r_addend = 0;
2892 htab->elf.srelgot->reloc_count++;
2893 loc += sizeof (Elf32_External_Rela);
2894 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2895 }
2896 }
2897
2898 if (h != NULL)
2899 h->got.offset |= 1;
2900 else
2901 local_got_offsets[r_symndx] |= 1;
2902 }
2903
2904 if (off >= (bfd_vma) -2)
2905 abort ();
2906 if (r_type == ELF32_R_TYPE (rel->r_info))
2907 {
2908 relocation = htab->elf.sgot->output_offset + off;
2909 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2910 relocation += htab->elf.sgot->output_section->vma;
2911 unresolved_reloc = FALSE;
2912 }
2913 else
2914 {
2915 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2916 contents + rel->r_offset);
2917 continue;
2918 }
2919 break;
2920
2921 case R_390_TLS_GOTIE12:
2922 case R_390_TLS_GOTIE20:
2923 case R_390_TLS_IEENT:
2924 if (h == NULL)
2925 {
2926 if (local_got_offsets == NULL)
2927 abort();
2928 off = local_got_offsets[r_symndx];
2929 if (bfd_link_pic (info))
2930 goto emit_tls_relocs;
2931 }
2932 else
2933 {
2934 off = h->got.offset;
2935 tls_type = elf_s390_hash_entry(h)->tls_type;
2936 if (bfd_link_pic (info)
2937 || h->dynindx != -1
2938 || tls_type < GOT_TLS_IE)
2939 goto emit_tls_relocs;
2940 }
2941
2942 if (htab->elf.sgot == NULL)
2943 abort ();
2944
2945 BFD_ASSERT (! unresolved_reloc);
2946 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2947 htab->elf.sgot->contents + off);
2948 relocation = htab->elf.sgot->output_offset + off;
2949 if (r_type == R_390_TLS_IEENT)
2950 relocation += htab->elf.sgot->output_section->vma;
2951 unresolved_reloc = FALSE;
2952 break;
2953
2954 case R_390_TLS_LDM32:
2955 if (! bfd_link_pic (info))
2956 /* The literal pool entry this relocation refers to gets ignored
2957 by the optimized code of the local exec model. Do nothing
2958 and the value will turn out zero. */
2959 continue;
2960
2961 if (htab->elf.sgot == NULL)
2962 abort ();
2963
2964 off = htab->tls_ldm_got.offset;
2965 if (off & 1)
2966 off &= ~1;
2967 else
2968 {
2969 Elf_Internal_Rela outrel;
2970 bfd_byte *loc;
2971
2972 if (htab->elf.srelgot == NULL)
2973 abort ();
2974
2975 outrel.r_offset = (htab->elf.sgot->output_section->vma
2976 + htab->elf.sgot->output_offset + off);
2977
2978 bfd_put_32 (output_bfd, 0,
2979 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2980 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2981 outrel.r_addend = 0;
2982 loc = htab->elf.srelgot->contents;
2983 loc += htab->elf.srelgot->reloc_count++
2984 * sizeof (Elf32_External_Rela);
2985 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2986 htab->tls_ldm_got.offset |= 1;
2987 }
2988 relocation = htab->elf.sgot->output_offset + off;
2989 unresolved_reloc = FALSE;
2990 break;
2991
2992 case R_390_TLS_LE32:
2993 if (bfd_link_dll (info))
2994 {
2995 /* Linking a shared library with non-fpic code requires
2996 a R_390_TLS_TPOFF relocation. */
2997 Elf_Internal_Rela outrel;
2998 asection *sreloc;
2999 bfd_byte *loc;
3000 int indx;
3001
3002 outrel.r_offset = rel->r_offset
3003 + input_section->output_section->vma
3004 + input_section->output_offset;
3005 if (h != NULL && h->dynindx != -1)
3006 indx = h->dynindx;
3007 else
3008 indx = 0;
3009 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3010 if (indx == 0)
3011 outrel.r_addend = relocation - dtpoff_base (info);
3012 else
3013 outrel.r_addend = 0;
3014 sreloc = elf_section_data (input_section)->sreloc;
3015 if (sreloc == NULL)
3016 abort ();
3017 loc = sreloc->contents;
3018 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3019 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3020 }
3021 else
3022 {
3023 BFD_ASSERT (! unresolved_reloc);
3024 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3025 contents + rel->r_offset);
3026 }
3027 continue;
3028
3029 case R_390_TLS_LDO32:
3030 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3031 relocation -= dtpoff_base (info);
3032 else
3033 /* When converting LDO to LE, we must negate. */
3034 relocation = -tpoff (info, relocation);
3035 break;
3036
3037 /* Relocations for tls instructions. */
3038 case R_390_TLS_LOAD:
3039 case R_390_TLS_GDCALL:
3040 case R_390_TLS_LDCALL:
3041 tls_type = GOT_UNKNOWN;
3042 if (h == NULL && local_got_offsets)
3043 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3044 else if (h != NULL)
3045 tls_type = elf_s390_hash_entry(h)->tls_type;
3046
3047 if (tls_type == GOT_TLS_GD)
3048 continue;
3049
3050 if (r_type == R_390_TLS_LOAD)
3051 {
3052 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3053 {
3054 /* IE->LE transition. Four valid cases:
3055 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3056 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3057 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3058 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3059 unsigned int insn, ry;
3060
3061 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3062 if ((insn & 0xff00f000) == 0x58000000)
3063 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3064 ry = (insn & 0x000f0000);
3065 else if ((insn & 0xff0f0000) == 0x58000000)
3066 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3067 ry = (insn & 0x0000f000) << 4;
3068 else if ((insn & 0xff00f000) == 0x5800c000)
3069 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3070 ry = (insn & 0x000f0000);
3071 else if ((insn & 0xff0f0000) == 0x580c0000)
3072 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3073 ry = (insn & 0x0000f000) << 4;
3074 else
3075 {
3076 invalid_tls_insn (input_bfd, input_section, rel);
3077 return FALSE;
3078 }
3079 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3080 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3081 }
3082 }
3083 else if (r_type == R_390_TLS_GDCALL)
3084 {
3085 unsigned int insn;
3086
3087 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3088 if ((insn & 0xff000fff) != 0x4d000000 &&
3089 (insn & 0xffff0000) != 0xc0e50000 &&
3090 (insn & 0xff000000) != 0x0d000000)
3091 {
3092 invalid_tls_insn (input_bfd, input_section, rel);
3093 return FALSE;
3094 }
3095 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3096 {
3097 if ((insn & 0xff000000) == 0x0d000000)
3098 {
3099 /* GD->LE transition.
3100 basr rx, ry -> nopr r7 */
3101 insn = 0x07070000 | (insn & 0xffff);
3102 }
3103 else if ((insn & 0xff000000) == 0x4d000000)
3104 {
3105 /* GD->LE transition.
3106 bas %r14,0(%rx,%r13) -> bc 0,0 */
3107 insn = 0x47000000;
3108 }
3109 else
3110 {
3111 /* GD->LE transition.
3112 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3113 insn = 0xc0040000;
3114 bfd_put_16 (output_bfd, 0x0000,
3115 contents + rel->r_offset + 4);
3116 }
3117 }
3118 else
3119 {
3120 /* If basr is used in the pic case to invoke
3121 _tls_get_offset, something went wrong before. */
3122 if ((insn & 0xff000000) == 0x0d000000)
3123 {
3124 invalid_tls_insn (input_bfd, input_section, rel);
3125 return FALSE;
3126 }
3127
3128 if ((insn & 0xff000000) == 0x4d000000)
3129 {
3130 /* GD->IE transition.
3131 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3132 insn = 0x5822c000;
3133 }
3134 else
3135 {
3136 /* GD->IE transition.
3137 brasl %r14,__tls_get_addr@plt ->
3138 l %r2,0(%r2,%r12) ; bcr 0,0 */
3139 insn = 0x5822c000;
3140 bfd_put_16 (output_bfd, 0x0700,
3141 contents + rel->r_offset + 4);
3142 }
3143 }
3144 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3145 }
3146 else if (r_type == R_390_TLS_LDCALL)
3147 {
3148 if (!bfd_link_pic (info))
3149 {
3150 unsigned int insn;
3151
3152 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3153 if ((insn & 0xff000fff) != 0x4d000000 &&
3154 (insn & 0xffff0000) != 0xc0e50000 &&
3155 (insn & 0xff000000) != 0x0d000000)
3156 {
3157 invalid_tls_insn (input_bfd, input_section, rel);
3158 return FALSE;
3159 }
3160
3161 if ((insn & 0xff000000) == 0x0d000000)
3162 {
3163 /* LD->LE transition.
3164 basr rx, ry -> nopr r7 */
3165 insn = 0x07070000 | (insn & 0xffff);
3166 }
3167 else if ((insn & 0xff000000) == 0x4d000000)
3168 {
3169 /* LD->LE transition.
3170 bas %r14,0(%rx,%r13) -> bc 0,0 */
3171 insn = 0x47000000;
3172 }
3173 else
3174 {
3175 /* LD->LE transition.
3176 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3177 insn = 0xc0040000;
3178 bfd_put_16 (output_bfd, 0x0000,
3179 contents + rel->r_offset + 4);
3180 }
3181 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3182 }
3183 }
3184 continue;
3185
3186 default:
3187 break;
3188 }
3189
3190 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3191 because such sections are not SEC_ALLOC and thus ld.so will
3192 not process them. */
3193 if (unresolved_reloc
3194 && !((input_section->flags & SEC_DEBUGGING) != 0
3195 && h->def_dynamic)
3196 && _bfd_elf_section_offset (output_bfd, info, input_section,
3197 rel->r_offset) != (bfd_vma) -1)
3198 _bfd_error_handler
3199 /* xgettext:c-format */
3200 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3201 input_bfd,
3202 input_section,
3203 rel->r_offset,
3204 howto->name,
3205 h->root.root.string);
3206
3207 do_relocation:
3208
3209 /* When applying a 24 bit reloc we need to start one byte
3210 earlier. Otherwise the 32 bit get/put bfd operations might
3211 access a byte after the actual section. */
3212 if (r_type == R_390_PC24DBL
3213 || r_type == R_390_PLT24DBL)
3214 rel->r_offset--;
3215
3216 if (r_type == R_390_20
3217 || r_type == R_390_GOT20
3218 || r_type == R_390_GOTPLT20
3219 || r_type == R_390_TLS_GOTIE20)
3220 {
3221 relocation += rel->r_addend;
3222 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3223 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3224 contents, rel->r_offset,
3225 relocation, 0);
3226 }
3227 else
3228 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3229 contents, rel->r_offset,
3230 relocation, rel->r_addend);
3231
3232 if (r != bfd_reloc_ok)
3233 {
3234 const char *name;
3235
3236 if (h != NULL)
3237 name = h->root.root.string;
3238 else
3239 {
3240 name = bfd_elf_string_from_elf_section (input_bfd,
3241 symtab_hdr->sh_link,
3242 sym->st_name);
3243 if (name == NULL)
3244 return FALSE;
3245 if (*name == '\0')
3246 name = bfd_section_name (input_bfd, sec);
3247 }
3248
3249 if (r == bfd_reloc_overflow)
3250 (*info->callbacks->reloc_overflow)
3251 (info, (h ? &h->root : NULL), name, howto->name,
3252 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3253 else
3254 {
3255 _bfd_error_handler
3256 /* xgettext:c-format */
3257 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3258 input_bfd, input_section,
3259 rel->r_offset, name, (int) r);
3260 return FALSE;
3261 }
3262 }
3263 }
3264
3265 return TRUE;
3266 }
3267
3268 /* Generate the PLT slots together with the dynamic relocations needed
3269 for IFUNC symbols. */
3270
3271 static void
3272 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3273 struct bfd_link_info *info,
3274 struct elf_link_hash_entry *h,
3275 struct elf_s390_link_hash_table *htab,
3276 bfd_vma iplt_offset,
3277 bfd_vma resolver_address)
3278 {
3279 bfd_vma iplt_index;
3280 bfd_vma got_offset;
3281 bfd_vma igotiplt_offset;
3282 Elf_Internal_Rela rela;
3283 bfd_byte *loc;
3284 asection *plt, *gotplt, *relplt;
3285 bfd_vma relative_offset;
3286
3287 if (htab->elf.iplt == NULL
3288 || htab->elf.igotplt == NULL
3289 || htab->elf.irelplt == NULL)
3290 abort ();
3291
3292 gotplt = htab->elf.igotplt;
3293 relplt = htab->elf.irelplt;
3294
3295 /* Index of the PLT slot within iplt section. */
3296 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3297 plt = htab->elf.iplt;
3298 /* Offset into the igot.plt section. */
3299 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3300 /* Offset into the got section. */
3301 got_offset = igotiplt_offset + gotplt->output_offset;
3302
3303 /* S390 uses halfwords for relative branch calc! */
3304 relative_offset = - (plt->output_offset +
3305 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3306 /* If offset is > 32768, branch to a previous branch
3307 390 can only handle +-64 K jumps. */
3308 if ( -32768 > (int) relative_offset )
3309 relative_offset
3310 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3311
3312 /* Fill in the entry in the procedure linkage table. */
3313 if (!bfd_link_pic (info))
3314 {
3315 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3316 PLT_ENTRY_SIZE);
3317
3318 /* Adjust jump to the first plt entry. */
3319 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3320 plt->contents + iplt_offset + 20);
3321
3322 /* Push the GOT offset field. */
3323 bfd_put_32 (output_bfd,
3324 (gotplt->output_section->vma
3325 + got_offset),
3326 plt->contents + iplt_offset + 24);
3327 }
3328 else if (got_offset < 4096)
3329 {
3330 /* The GOT offset is small enough to be used directly as
3331 displacement. */
3332 memcpy (plt->contents + iplt_offset,
3333 elf_s390_plt_pic12_entry,
3334 PLT_ENTRY_SIZE);
3335
3336 /* Put in the GOT offset as displacement value. The 0xc000
3337 value comes from the first word of the plt entry. Look
3338 at the elf_s390_plt_pic16_entry content. */
3339 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3340 plt->contents + iplt_offset + 2);
3341
3342 /* Adjust the jump to the first plt entry. */
3343 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3344 plt->contents + iplt_offset + 20);
3345 }
3346 else if (got_offset < 32768)
3347 {
3348 /* The GOT offset is too big for a displacement but small
3349 enough to be a signed 16 bit immediate value as it can be
3350 used in an lhi instruction. */
3351 memcpy (plt->contents + iplt_offset,
3352 elf_s390_plt_pic16_entry,
3353 PLT_ENTRY_SIZE);
3354
3355 /* Put in the GOT offset for the lhi instruction. */
3356 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3357 plt->contents + iplt_offset + 2);
3358
3359 /* Adjust the jump to the first plt entry. */
3360 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3361 plt->contents + iplt_offset + 20);
3362 }
3363 else
3364 {
3365 memcpy (plt->contents + iplt_offset,
3366 elf_s390_plt_pic_entry,
3367 PLT_ENTRY_SIZE);
3368
3369 /* Adjust the jump to the first plt entry. */
3370 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3371 plt->contents + iplt_offset + 20);
3372
3373 /* Push the GOT offset field. */
3374 bfd_put_32 (output_bfd, got_offset,
3375 plt->contents + iplt_offset + 24);
3376 }
3377 /* Insert offset into reloc. table here. */
3378 bfd_put_32 (output_bfd, relplt->output_offset +
3379 iplt_index * RELA_ENTRY_SIZE,
3380 plt->contents + iplt_offset + 28);
3381
3382 /* Fill in the entry in the global offset table.
3383 Points to instruction after GOT offset. */
3384 bfd_put_32 (output_bfd,
3385 (plt->output_section->vma
3386 + plt->output_offset
3387 + iplt_offset
3388 + 12),
3389 gotplt->contents + igotiplt_offset);
3390
3391 /* Fill in the entry in the .rela.plt section. */
3392 rela.r_offset = gotplt->output_section->vma + got_offset;
3393
3394 if (!h
3395 || h->dynindx == -1
3396 || ((bfd_link_executable (info)
3397 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3398 && h->def_regular))
3399 {
3400 /* The symbol can be locally resolved. */
3401 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3402 rela.r_addend = resolver_address;
3403 }
3404 else
3405 {
3406 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3407 rela.r_addend = 0;
3408 }
3409
3410 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3411 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3412 }
3413
3414 /* Finish up dynamic symbol handling. We set the contents of various
3415 dynamic sections here. */
3416
3417 static bfd_boolean
3418 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3419 struct bfd_link_info *info,
3420 struct elf_link_hash_entry *h,
3421 Elf_Internal_Sym *sym)
3422 {
3423 struct elf_s390_link_hash_table *htab;
3424 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3425
3426 htab = elf_s390_hash_table (info);
3427
3428 if (h->plt.offset != (bfd_vma) -1)
3429 {
3430 bfd_vma plt_index;
3431 bfd_vma got_offset;
3432 Elf_Internal_Rela rela;
3433 bfd_byte *loc;
3434 bfd_vma relative_offset;
3435
3436 /* This symbol has an entry in the procedure linkage table. Set
3437 it up. */
3438 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3439 {
3440 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3441 htab, h->plt.offset,
3442 eh->ifunc_resolver_address +
3443 eh->ifunc_resolver_section->output_offset +
3444 eh->ifunc_resolver_section->output_section->vma);
3445 /* Do not return yet. Handling of explicit GOT slots of
3446 IFUNC symbols is below. */
3447 }
3448 else
3449 {
3450 if (h->dynindx == -1
3451 || htab->elf.splt == NULL
3452 || htab->elf.sgotplt == NULL
3453 || htab->elf.srelplt == NULL)
3454 abort ();
3455
3456 /* Calc. index no.
3457 Current offset - size first entry / entry size. */
3458 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3459
3460 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3461 addr & GOT addr. */
3462 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3463
3464 /* S390 uses halfwords for relative branch calc! */
3465 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3466 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3467 /* If offset is > 32768, branch to a previous branch
3468 390 can only handle +-64 K jumps. */
3469 if ( -32768 > (int) relative_offset )
3470 relative_offset
3471 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3472
3473 /* Fill in the entry in the procedure linkage table. */
3474 if (!bfd_link_pic (info))
3475 {
3476 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3477 PLT_ENTRY_SIZE);
3478
3479 /* Adjust jump to the first plt entry. */
3480 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3481 htab->elf.splt->contents + h->plt.offset + 20);
3482
3483 /* Push the GOT offset field. */
3484 bfd_put_32 (output_bfd,
3485 (htab->elf.sgotplt->output_section->vma
3486 + htab->elf.sgotplt->output_offset
3487 + got_offset),
3488 htab->elf.splt->contents + h->plt.offset + 24);
3489 }
3490 else if (got_offset < 4096)
3491 {
3492 /* The GOT offset is small enough to be used directly as
3493 displacement. */
3494 memcpy (htab->elf.splt->contents + h->plt.offset,
3495 elf_s390_plt_pic12_entry,
3496 PLT_ENTRY_SIZE);
3497
3498 /* Put in the GOT offset as displacement value. The 0xc000
3499 value comes from the first word of the plt entry. Look
3500 at the elf_s390_plt_pic12_entry content. */
3501 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3502 htab->elf.splt->contents + h->plt.offset + 2);
3503
3504 /* Adjust the jump to the first plt entry. */
3505 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3506 htab->elf.splt->contents + h->plt.offset + 20);
3507 }
3508 else if (got_offset < 32768)
3509 {
3510 /* The GOT offset is too big for a displacement but small
3511 enough to be a signed 16 bit immediate value as it can be
3512 used in an lhi instruction. */
3513 memcpy (htab->elf.splt->contents + h->plt.offset,
3514 elf_s390_plt_pic16_entry,
3515 PLT_ENTRY_SIZE);
3516
3517 /* Put in the GOT offset for the lhi instruction. */
3518 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3519 htab->elf.splt->contents + h->plt.offset + 2);
3520
3521 /* Adjust the jump to the first plt entry. */
3522 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3523 htab->elf.splt->contents + h->plt.offset + 20);
3524 }
3525 else
3526 {
3527 memcpy (htab->elf.splt->contents + h->plt.offset,
3528 elf_s390_plt_pic_entry,
3529 PLT_ENTRY_SIZE);
3530
3531 /* Adjust the jump to the first plt entry. */
3532 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3533 htab->elf.splt->contents + h->plt.offset + 20);
3534
3535 /* Push the GOT offset field. */
3536 bfd_put_32 (output_bfd, got_offset,
3537 htab->elf.splt->contents + h->plt.offset + 24);
3538 }
3539 /* Insert offset into reloc. table here. */
3540 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3541 htab->elf.splt->contents + h->plt.offset + 28);
3542
3543 /* Fill in the entry in the global offset table.
3544 Points to instruction after GOT offset. */
3545 bfd_put_32 (output_bfd,
3546 (htab->elf.splt->output_section->vma
3547 + htab->elf.splt->output_offset
3548 + h->plt.offset
3549 + 12),
3550 htab->elf.sgotplt->contents + got_offset);
3551
3552 /* Fill in the entry in the .rela.plt section. */
3553 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3554 + htab->elf.sgotplt->output_offset
3555 + got_offset);
3556 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3557 rela.r_addend = 0;
3558 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3559 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3560
3561 if (!h->def_regular)
3562 {
3563 /* Mark the symbol as undefined, rather than as defined in
3564 the .plt section. Leave the value alone. This is a clue
3565 for the dynamic linker, to make function pointer
3566 comparisons work between an application and shared
3567 library. */
3568 sym->st_shndx = SHN_UNDEF;
3569 }
3570 }
3571 }
3572
3573 if (h->got.offset != (bfd_vma) -1
3574 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3575 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3576 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3577 {
3578 Elf_Internal_Rela rela;
3579 bfd_byte *loc;
3580
3581 /* This symbol has an entry in the global offset table. Set it
3582 up. */
3583
3584 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3585 abort ();
3586
3587 rela.r_offset = (htab->elf.sgot->output_section->vma
3588 + htab->elf.sgot->output_offset
3589 + (h->got.offset &~ (bfd_vma) 1));
3590
3591 /* If this is a static link, or it is a -Bsymbolic link and the
3592 symbol is defined locally or was forced to be local because
3593 of a version file, we just want to emit a RELATIVE reloc.
3594 The entry in the global offset table will already have been
3595 initialized in the relocate_section function. */
3596 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3597 {
3598 if (bfd_link_pic (info))
3599 {
3600 /* An explicit GOT slot usage needs GLOB_DAT. If the
3601 symbol references local the implicit got.iplt slot
3602 will be used and the IRELATIVE reloc has been created
3603 above. */
3604 goto do_glob_dat;
3605 }
3606 else
3607 {
3608 /* For non-shared objects explicit GOT slots must be
3609 filled with the PLT slot address for pointer
3610 equality reasons. */
3611 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3612 + htab->elf.iplt->output_offset
3613 + h->plt.offset),
3614 htab->elf.sgot->contents + h->got.offset);
3615 return TRUE;
3616 }
3617 }
3618 else if (bfd_link_pic (info)
3619 && SYMBOL_REFERENCES_LOCAL (info, h))
3620 {
3621 /* If this is a static link, or it is a -Bsymbolic link and
3622 the symbol is defined locally or was forced to be local
3623 because of a version file, we just want to emit a
3624 RELATIVE reloc. The entry in the global offset table
3625 will already have been initialized in the
3626 relocate_section function. */
3627 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3628 return FALSE;
3629 BFD_ASSERT((h->got.offset & 1) != 0);
3630 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3631 rela.r_addend = (h->root.u.def.value
3632 + h->root.u.def.section->output_section->vma
3633 + h->root.u.def.section->output_offset);
3634 }
3635 else
3636 {
3637 BFD_ASSERT((h->got.offset & 1) == 0);
3638 do_glob_dat:
3639 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3640 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3641 rela.r_addend = 0;
3642 }
3643
3644 loc = htab->elf.srelgot->contents;
3645 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3646 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3647 }
3648
3649 if (h->needs_copy)
3650 {
3651 Elf_Internal_Rela rela;
3652 asection *s;
3653 bfd_byte *loc;
3654
3655 /* This symbols needs a copy reloc. Set it up. */
3656
3657 if (h->dynindx == -1
3658 || (h->root.type != bfd_link_hash_defined
3659 && h->root.type != bfd_link_hash_defweak)
3660 || htab->elf.srelbss == NULL
3661 || htab->elf.sreldynrelro == NULL)
3662 abort ();
3663
3664 rela.r_offset = (h->root.u.def.value
3665 + h->root.u.def.section->output_section->vma
3666 + h->root.u.def.section->output_offset);
3667 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3668 rela.r_addend = 0;
3669 if (h->root.u.def.section == htab->elf.sdynrelro)
3670 s = htab->elf.sreldynrelro;
3671 else
3672 s = htab->elf.srelbss;
3673 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3674 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3675 }
3676
3677 /* Mark some specially defined symbols as absolute. */
3678 if (h == htab->elf.hdynamic
3679 || h == htab->elf.hgot
3680 || h == htab->elf.hplt)
3681 sym->st_shndx = SHN_ABS;
3682
3683 return TRUE;
3684 }
3685
3686 /* Used to decide how to sort relocs in an optimal manner for the
3687 dynamic linker, before writing them out. */
3688
3689 static enum elf_reloc_type_class
3690 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3691 const asection *rel_sec ATTRIBUTE_UNUSED,
3692 const Elf_Internal_Rela *rela)
3693 {
3694 bfd *abfd = info->output_bfd;
3695 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3696 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3697 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3698 Elf_Internal_Sym sym;
3699
3700 if (htab->elf.dynsym == NULL
3701 || !bed->s->swap_symbol_in (abfd,
3702 (htab->elf.dynsym->contents
3703 + r_symndx * bed->s->sizeof_sym),
3704 0, &sym))
3705 abort ();
3706
3707 /* Check relocation against STT_GNU_IFUNC symbol. */
3708 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3709 return reloc_class_ifunc;
3710
3711 switch ((int) ELF32_R_TYPE (rela->r_info))
3712 {
3713 case R_390_RELATIVE:
3714 return reloc_class_relative;
3715 case R_390_JMP_SLOT:
3716 return reloc_class_plt;
3717 case R_390_COPY:
3718 return reloc_class_copy;
3719 default:
3720 return reloc_class_normal;
3721 }
3722 }
3723
3724 /* Finish up the dynamic sections. */
3725
3726 static bfd_boolean
3727 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3728 struct bfd_link_info *info)
3729 {
3730 struct elf_s390_link_hash_table *htab;
3731 bfd *dynobj;
3732 asection *sdyn;
3733 bfd *ibfd;
3734 unsigned int i;
3735
3736 htab = elf_s390_hash_table (info);
3737 dynobj = htab->elf.dynobj;
3738 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3739
3740 if (htab->elf.dynamic_sections_created)
3741 {
3742 Elf32_External_Dyn *dyncon, *dynconend;
3743
3744 if (sdyn == NULL || htab->elf.sgot == NULL)
3745 abort ();
3746
3747 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3748 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3749 for (; dyncon < dynconend; dyncon++)
3750 {
3751 Elf_Internal_Dyn dyn;
3752 asection *s;
3753
3754 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3755
3756 switch (dyn.d_tag)
3757 {
3758 default:
3759 continue;
3760
3761 case DT_PLTGOT:
3762 s = htab->elf.sgotplt;
3763 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3764 break;
3765
3766 case DT_JMPREL:
3767 s = htab->elf.srelplt;
3768 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3769 break;
3770
3771 case DT_PLTRELSZ:
3772 dyn.d_un.d_val = htab->elf.srelplt->size;
3773 if (htab->elf.irelplt)
3774 dyn.d_un.d_val += htab->elf.irelplt->size;
3775 break;
3776 }
3777
3778 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3779 }
3780
3781 /* Fill in the special first entry in the procedure linkage table. */
3782 if (htab->elf.splt && htab->elf.splt->size > 0)
3783 {
3784 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3785 if (bfd_link_pic (info))
3786 {
3787 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3788 PLT_FIRST_ENTRY_SIZE);
3789 }
3790 else
3791 {
3792 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3793 PLT_FIRST_ENTRY_SIZE);
3794 bfd_put_32 (output_bfd,
3795 htab->elf.sgotplt->output_section->vma
3796 + htab->elf.sgotplt->output_offset,
3797 htab->elf.splt->contents + 24);
3798 }
3799 elf_section_data (htab->elf.splt->output_section)
3800 ->this_hdr.sh_entsize = 4;
3801 }
3802
3803 }
3804
3805 if (htab->elf.sgotplt)
3806 {
3807 /* Fill in the first three entries in the global offset table. */
3808 if (htab->elf.sgotplt->size > 0)
3809 {
3810 bfd_put_32 (output_bfd,
3811 (sdyn == NULL ? (bfd_vma) 0
3812 : sdyn->output_section->vma + sdyn->output_offset),
3813 htab->elf.sgotplt->contents);
3814 /* One entry for shared object struct ptr. */
3815 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3816 /* One entry for _dl_runtime_resolve. */
3817 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3818 }
3819
3820 elf_section_data (htab->elf.sgotplt->output_section)
3821 ->this_hdr.sh_entsize = 4;
3822 }
3823 /* Finish dynamic symbol for local IFUNC symbols. */
3824 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3825 {
3826 struct plt_entry *local_plt;
3827 Elf_Internal_Sym *isym;
3828 Elf_Internal_Shdr *symtab_hdr;
3829
3830 symtab_hdr = &elf_symtab_hdr (ibfd);
3831
3832 if (!is_s390_elf (ibfd))
3833 continue;
3834
3835 local_plt = elf_s390_local_plt (ibfd);
3836 if (local_plt != NULL)
3837 for (i = 0; i < symtab_hdr->sh_info; i++)
3838 {
3839 if (local_plt[i].plt.offset != (bfd_vma) -1)
3840 {
3841 asection *sec = local_plt[i].sec;
3842 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3843 if (isym == NULL)
3844 return FALSE;
3845
3846 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3847 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3848 local_plt[i].plt.offset,
3849 isym->st_value
3850 + sec->output_section->vma
3851 + sec->output_offset);
3852
3853 }
3854 }
3855 }
3856 return TRUE;
3857 }
3858 \f
3859 /* Support for core dump NOTE sections. */
3860
3861 static bfd_boolean
3862 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3863 {
3864 int offset;
3865 unsigned int size;
3866
3867 switch (note->descsz)
3868 {
3869 default:
3870 return FALSE;
3871
3872 case 224: /* S/390 Linux. */
3873 /* pr_cursig */
3874 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3875
3876 /* pr_pid */
3877 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3878
3879 /* pr_reg */
3880 offset = 72;
3881 size = 144;
3882 break;
3883 }
3884
3885 /* Make a ".reg/999" section. */
3886 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3887 size, note->descpos + offset);
3888 }
3889
3890 static bfd_boolean
3891 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3892 {
3893 switch (note->descsz)
3894 {
3895 default:
3896 return FALSE;
3897
3898 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3899 elf_tdata (abfd)->core->pid
3900 = bfd_get_32 (abfd, note->descdata + 12);
3901 elf_tdata (abfd)->core->program
3902 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3903 elf_tdata (abfd)->core->command
3904 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3905 break;
3906 }
3907
3908 /* Note that for some reason, a spurious space is tacked
3909 onto the end of the args in some (at least one anyway)
3910 implementations, so strip it off if it exists. */
3911
3912 {
3913 char *command = elf_tdata (abfd)->core->command;
3914 int n = strlen (command);
3915
3916 if (0 < n && command[n - 1] == ' ')
3917 command[n - 1] = '\0';
3918 }
3919
3920 return TRUE;
3921 }
3922
3923 static char *
3924 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3925 int note_type, ...)
3926 {
3927 va_list ap;
3928
3929 switch (note_type)
3930 {
3931 default:
3932 return NULL;
3933
3934 case NT_PRPSINFO:
3935 {
3936 char data[124] = { 0 };
3937 const char *fname, *psargs;
3938
3939 va_start (ap, note_type);
3940 fname = va_arg (ap, const char *);
3941 psargs = va_arg (ap, const char *);
3942 va_end (ap);
3943
3944 strncpy (data + 28, fname, 16);
3945 strncpy (data + 44, psargs, 80);
3946 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3947 &data, sizeof (data));
3948 }
3949
3950 case NT_PRSTATUS:
3951 {
3952 char data[224] = { 0 };
3953 long pid;
3954 int cursig;
3955 const void *gregs;
3956
3957 va_start (ap, note_type);
3958 pid = va_arg (ap, long);
3959 cursig = va_arg (ap, int);
3960 gregs = va_arg (ap, const void *);
3961 va_end (ap);
3962
3963 bfd_put_16 (abfd, cursig, data + 12);
3964 bfd_put_32 (abfd, pid, data + 24);
3965 memcpy (data + 72, gregs, 144);
3966 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3967 &data, sizeof (data));
3968 }
3969 }
3970 /* NOTREACHED */
3971 }
3972 \f
3973 /* Return address for Ith PLT stub in section PLT, for relocation REL
3974 or (bfd_vma) -1 if it should not be included. */
3975
3976 static bfd_vma
3977 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3978 const arelent *rel ATTRIBUTE_UNUSED)
3979 {
3980 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3981 }
3982
3983 /* Merge backend specific data from an object file to the output
3984 object file when linking. */
3985
3986 static bfd_boolean
3987 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3988 {
3989 bfd *obfd = info->output_bfd;
3990
3991 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3992 return TRUE;
3993
3994 if (!elf_s390_merge_obj_attributes (ibfd, info))
3995 return FALSE;
3996
3997 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3998 return TRUE;
3999 }
4000
4001
4002 #define TARGET_BIG_SYM s390_elf32_vec
4003 #define TARGET_BIG_NAME "elf32-s390"
4004 #define ELF_ARCH bfd_arch_s390
4005 #define ELF_TARGET_ID S390_ELF_DATA
4006 #define ELF_MACHINE_CODE EM_S390
4007 #define ELF_MACHINE_ALT1 EM_S390_OLD
4008 #define ELF_MAXPAGESIZE 0x1000
4009
4010 #define elf_backend_can_gc_sections 1
4011 #define elf_backend_can_refcount 1
4012 #define elf_backend_want_got_plt 1
4013 #define elf_backend_plt_readonly 1
4014 #define elf_backend_want_plt_sym 0
4015 #define elf_backend_got_header_size 12
4016 #define elf_backend_want_dynrelro 1
4017 #define elf_backend_rela_normal 1
4018
4019 #define elf_info_to_howto elf_s390_info_to_howto
4020
4021 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4022 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4023 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4024 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4025
4026 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4027
4028 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4029 #define elf_backend_check_relocs elf_s390_check_relocs
4030 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4031 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4032 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4033 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4034 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4035 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4036 #define elf_backend_relocate_section elf_s390_relocate_section
4037 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4038 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4039 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4040 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4041 #define elf_backend_write_core_note elf_s390_write_core_note
4042 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4043 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4044 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4045
4046 #define bfd_elf32_mkobject elf_s390_mkobject
4047 #define elf_backend_object_p elf_s390_object_p
4048
4049 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4050
4051 #include "elf32-target.h"
GDB Binutils - Deliverables
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