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bfd target vector rationalisation
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2014 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
29 static bfd_reloc_status_type
30 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
31 asection *, bfd *, char **);
32 static bfd_reloc_status_type
33 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
34 asection *, bfd *, char **);
35
36 /* The relocation "howto" table. */
37
38 static reloc_howto_type elf_howto_table[] =
39 {
40 HOWTO (R_390_NONE, /* type */
41 0, /* rightshift */
42 0, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
43 0, /* bitsize */
44 FALSE, /* pc_relative */
45 0, /* bitpos */
46 complain_overflow_dont, /* complain_on_overflow */
47 bfd_elf_generic_reloc, /* special_function */
48 "R_390_NONE", /* name */
49 FALSE, /* partial_inplace */
50 0, /* src_mask */
51 0, /* dst_mask */
52 FALSE), /* pcrel_offset */
53
54 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
55 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
56 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
57 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
58 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
60 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
62 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
64 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
66 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
68 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
70 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
72 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
74 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
76 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
78 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
80 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
82 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
84 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
86 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
88 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
90 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
92 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
94 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
96 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
97 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
98 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
99 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
100 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
102 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
104 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
105 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
106 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
107 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
109 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
111 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
112 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
114 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
116 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
118 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
119 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
120 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
121 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
122 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
123 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
124 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
125 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
127 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
128 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
129 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
130 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
132 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
133 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
135 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
136 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
138 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
139 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
141 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
143 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
144 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
146 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
147 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
149 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
151 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
153 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
154 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
155 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
156 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
157 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
158 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
159 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
160 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
161 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
163 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
165 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
167 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
169 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
171 };
172
173 /* GNU extension to record C++ vtable hierarchy. */
174 static reloc_howto_type elf32_s390_vtinherit_howto =
175 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
176 static reloc_howto_type elf32_s390_vtentry_howto =
177 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);
178
179 static reloc_howto_type *
180 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
181 bfd_reloc_code_real_type code)
182 {
183 switch (code)
184 {
185 case BFD_RELOC_NONE:
186 return &elf_howto_table[(int) R_390_NONE];
187 case BFD_RELOC_8:
188 return &elf_howto_table[(int) R_390_8];
189 case BFD_RELOC_390_12:
190 return &elf_howto_table[(int) R_390_12];
191 case BFD_RELOC_16:
192 return &elf_howto_table[(int) R_390_16];
193 case BFD_RELOC_32:
194 return &elf_howto_table[(int) R_390_32];
195 case BFD_RELOC_CTOR:
196 return &elf_howto_table[(int) R_390_32];
197 case BFD_RELOC_32_PCREL:
198 return &elf_howto_table[(int) R_390_PC32];
199 case BFD_RELOC_390_GOT12:
200 return &elf_howto_table[(int) R_390_GOT12];
201 case BFD_RELOC_32_GOT_PCREL:
202 return &elf_howto_table[(int) R_390_GOT32];
203 case BFD_RELOC_390_PLT32:
204 return &elf_howto_table[(int) R_390_PLT32];
205 case BFD_RELOC_390_COPY:
206 return &elf_howto_table[(int) R_390_COPY];
207 case BFD_RELOC_390_GLOB_DAT:
208 return &elf_howto_table[(int) R_390_GLOB_DAT];
209 case BFD_RELOC_390_JMP_SLOT:
210 return &elf_howto_table[(int) R_390_JMP_SLOT];
211 case BFD_RELOC_390_RELATIVE:
212 return &elf_howto_table[(int) R_390_RELATIVE];
213 case BFD_RELOC_32_GOTOFF:
214 return &elf_howto_table[(int) R_390_GOTOFF32];
215 case BFD_RELOC_390_GOTPC:
216 return &elf_howto_table[(int) R_390_GOTPC];
217 case BFD_RELOC_390_GOT16:
218 return &elf_howto_table[(int) R_390_GOT16];
219 case BFD_RELOC_16_PCREL:
220 return &elf_howto_table[(int) R_390_PC16];
221 case BFD_RELOC_390_PC12DBL:
222 return &elf_howto_table[(int) R_390_PC12DBL];
223 case BFD_RELOC_390_PLT12DBL:
224 return &elf_howto_table[(int) R_390_PLT12DBL];
225 case BFD_RELOC_390_PC16DBL:
226 return &elf_howto_table[(int) R_390_PC16DBL];
227 case BFD_RELOC_390_PLT16DBL:
228 return &elf_howto_table[(int) R_390_PLT16DBL];
229 case BFD_RELOC_390_PC24DBL:
230 return &elf_howto_table[(int) R_390_PC24DBL];
231 case BFD_RELOC_390_PLT24DBL:
232 return &elf_howto_table[(int) R_390_PLT24DBL];
233 case BFD_RELOC_390_PC32DBL:
234 return &elf_howto_table[(int) R_390_PC32DBL];
235 case BFD_RELOC_390_PLT32DBL:
236 return &elf_howto_table[(int) R_390_PLT32DBL];
237 case BFD_RELOC_390_GOTPCDBL:
238 return &elf_howto_table[(int) R_390_GOTPCDBL];
239 case BFD_RELOC_390_GOTENT:
240 return &elf_howto_table[(int) R_390_GOTENT];
241 case BFD_RELOC_16_GOTOFF:
242 return &elf_howto_table[(int) R_390_GOTOFF16];
243 case BFD_RELOC_390_GOTPLT12:
244 return &elf_howto_table[(int) R_390_GOTPLT12];
245 case BFD_RELOC_390_GOTPLT16:
246 return &elf_howto_table[(int) R_390_GOTPLT16];
247 case BFD_RELOC_390_GOTPLT32:
248 return &elf_howto_table[(int) R_390_GOTPLT32];
249 case BFD_RELOC_390_GOTPLTENT:
250 return &elf_howto_table[(int) R_390_GOTPLTENT];
251 case BFD_RELOC_390_PLTOFF16:
252 return &elf_howto_table[(int) R_390_PLTOFF16];
253 case BFD_RELOC_390_PLTOFF32:
254 return &elf_howto_table[(int) R_390_PLTOFF32];
255 case BFD_RELOC_390_TLS_LOAD:
256 return &elf_howto_table[(int) R_390_TLS_LOAD];
257 case BFD_RELOC_390_TLS_GDCALL:
258 return &elf_howto_table[(int) R_390_TLS_GDCALL];
259 case BFD_RELOC_390_TLS_LDCALL:
260 return &elf_howto_table[(int) R_390_TLS_LDCALL];
261 case BFD_RELOC_390_TLS_GD32:
262 return &elf_howto_table[(int) R_390_TLS_GD32];
263 case BFD_RELOC_390_TLS_GOTIE12:
264 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
265 case BFD_RELOC_390_TLS_GOTIE32:
266 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
267 case BFD_RELOC_390_TLS_LDM32:
268 return &elf_howto_table[(int) R_390_TLS_LDM32];
269 case BFD_RELOC_390_TLS_IE32:
270 return &elf_howto_table[(int) R_390_TLS_IE32];
271 case BFD_RELOC_390_TLS_IEENT:
272 return &elf_howto_table[(int) R_390_TLS_IEENT];
273 case BFD_RELOC_390_TLS_LE32:
274 return &elf_howto_table[(int) R_390_TLS_LE32];
275 case BFD_RELOC_390_TLS_LDO32:
276 return &elf_howto_table[(int) R_390_TLS_LDO32];
277 case BFD_RELOC_390_TLS_DTPMOD:
278 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
279 case BFD_RELOC_390_TLS_DTPOFF:
280 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
281 case BFD_RELOC_390_TLS_TPOFF:
282 return &elf_howto_table[(int) R_390_TLS_TPOFF];
283 case BFD_RELOC_390_20:
284 return &elf_howto_table[(int) R_390_20];
285 case BFD_RELOC_390_GOT20:
286 return &elf_howto_table[(int) R_390_GOT20];
287 case BFD_RELOC_390_GOTPLT20:
288 return &elf_howto_table[(int) R_390_GOTPLT20];
289 case BFD_RELOC_390_TLS_GOTIE20:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
291 case BFD_RELOC_390_IRELATIVE:
292 return &elf_howto_table[(int) R_390_IRELATIVE];
293 case BFD_RELOC_VTABLE_INHERIT:
294 return &elf32_s390_vtinherit_howto;
295 case BFD_RELOC_VTABLE_ENTRY:
296 return &elf32_s390_vtentry_howto;
297 default:
298 break;
299 }
300 return 0;
301 }
302
303 static reloc_howto_type *
304 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
305 const char *r_name)
306 {
307 unsigned int i;
308
309 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
310 if (elf_howto_table[i].name != NULL
311 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
312 return &elf_howto_table[i];
313
314 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
315 return &elf32_s390_vtinherit_howto;
316 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
317 return &elf32_s390_vtentry_howto;
318
319 return NULL;
320 }
321
322 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
323 and elf32-s390.c has its own copy. */
324
325 static void
326 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
327 arelent *cache_ptr,
328 Elf_Internal_Rela *dst)
329 {
330 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
331 switch (r_type)
332 {
333 case R_390_GNU_VTINHERIT:
334 cache_ptr->howto = &elf32_s390_vtinherit_howto;
335 break;
336
337 case R_390_GNU_VTENTRY:
338 cache_ptr->howto = &elf32_s390_vtentry_howto;
339 break;
340
341 default:
342 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
343 {
344 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
345 abfd, (int) r_type);
346 r_type = R_390_NONE;
347 }
348 cache_ptr->howto = &elf_howto_table[r_type];
349 }
350 }
351
352 /* A relocation function which doesn't do anything. */
353 static bfd_reloc_status_type
354 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
355 arelent *reloc_entry,
356 asymbol *symbol ATTRIBUTE_UNUSED,
357 void * data ATTRIBUTE_UNUSED,
358 asection *input_section,
359 bfd *output_bfd,
360 char **error_message ATTRIBUTE_UNUSED)
361 {
362 if (output_bfd)
363 reloc_entry->address += input_section->output_offset;
364 return bfd_reloc_ok;
365 }
366
367 /* Handle the large displacement relocs. */
368 static bfd_reloc_status_type
369 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
370 arelent *reloc_entry,
371 asymbol *symbol,
372 void * data ATTRIBUTE_UNUSED,
373 asection *input_section,
374 bfd *output_bfd,
375 char **error_message ATTRIBUTE_UNUSED)
376 {
377 reloc_howto_type *howto = reloc_entry->howto;
378 bfd_vma relocation;
379 bfd_vma insn;
380
381 if (output_bfd != (bfd *) NULL
382 && (symbol->flags & BSF_SECTION_SYM) == 0
383 && (! howto->partial_inplace
384 || reloc_entry->addend == 0))
385 {
386 reloc_entry->address += input_section->output_offset;
387 return bfd_reloc_ok;
388 }
389
390 if (output_bfd != NULL)
391 return bfd_reloc_continue;
392
393 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
394 return bfd_reloc_outofrange;
395
396 relocation = (symbol->value
397 + symbol->section->output_section->vma
398 + symbol->section->output_offset);
399 relocation += reloc_entry->addend;
400 if (howto->pc_relative)
401 {
402 relocation -= (input_section->output_section->vma
403 + input_section->output_offset);
404 relocation -= reloc_entry->address;
405 }
406
407 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
408 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
409 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
410
411 if ((bfd_signed_vma) relocation < - 0x80000
412 || (bfd_signed_vma) relocation > 0x7ffff)
413 return bfd_reloc_overflow;
414 else
415 return bfd_reloc_ok;
416 }
417
418 static bfd_boolean
419 elf_s390_is_local_label_name (bfd *abfd, const char *name)
420 {
421 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
422 return TRUE;
423
424 return _bfd_elf_is_local_label_name (abfd, name);
425 }
426
427 /* Functions for the 390 ELF linker. */
428
429 /* The name of the dynamic interpreter. This is put in the .interp
430 section. */
431
432 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
433
434 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
435 copying dynamic variables from a shared lib into an app's dynbss
436 section, and instead use a dynamic relocation to point into the
437 shared lib. */
438 #define ELIMINATE_COPY_RELOCS 1
439
440 /* The size in bytes of the first entry in the procedure linkage table. */
441 #define PLT_FIRST_ENTRY_SIZE 32
442 /* The size in bytes of an entry in the procedure linkage table. */
443 #define PLT_ENTRY_SIZE 32
444
445 #define GOT_ENTRY_SIZE 4
446
447 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
448
449 /* The first three entries in a procedure linkage table are reserved,
450 and the initial contents are unimportant (we zero them out).
451 Subsequent entries look like this. See the SVR4 ABI 386
452 supplement to see how this works. */
453
454 /* For the s390, simple addr offset can only be 0 - 4096.
455 To use the full 2 GB address space, several instructions
456 are needed to load an address in a register and execute
457 a branch( or just saving the address)
458
459 Furthermore, only r 0 and 1 are free to use!!! */
460
461 /* The first 3 words in the GOT are then reserved.
462 Word 0 is the address of the dynamic table.
463 Word 1 is a pointer to a structure describing the object
464 Word 2 is used to point to the loader entry address.
465
466 The code for position independent PLT entries looks like this:
467
468 r12 holds addr of the current GOT at entry to the PLT
469
470 The GOT holds the address in the PLT to be executed.
471 The loader then gets:
472 24(15) = Pointer to the structure describing the object.
473 28(15) = Offset into rela.plt
474
475 The loader must then find the module where the function is
476 and insert the address in the GOT.
477
478 Note: 390 can only address +- 64 K relative.
479 We check if offset > 65536, then make a relative branch -64xxx
480 back to a previous defined branch
481
482 PLT1: BASR 1,0 # 2 bytes
483 L 1,22(1) # 4 bytes Load offset in GOT in r 1
484 L 1,(1,12) # 4 bytes Load address from GOT in r1
485 BCR 15,1 # 2 bytes Jump to address
486 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
487 L 1,14(1) # 4 bytes Load offset in symol table in r1
488 BRC 15,-x # 4 bytes Jump to start of PLT
489 .word 0 # 2 bytes filler
490 .long ? # 4 bytes offset in GOT
491 .long ? # 4 bytes offset into rela.plt
492
493 This was the general case. There are two additional, optimizes PLT
494 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
495 First the one for GOT offsets < 4096:
496
497 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
498 BCR 15,1 # 2 bytes Jump to address
499 .word 0,0,0 # 6 bytes filler
500 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
501 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
502 BRC 15,-x # 4 bytes Jump to start of PLT
503 .word 0,0,0 # 6 bytes filler
504 .long ? # 4 bytes offset into rela.plt
505
506 Second the one for GOT offsets < 32768:
507
508 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
509 L 1,(1,12) # 4 bytes Load address from GOT to r1
510 BCR 15,1 # 2 bytes Jump to address
511 .word 0 # 2 bytes filler
512 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
513 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
514 BRC 15,-x # 4 bytes Jump to start of PLT
515 .word 0,0,0 # 6 bytes filler
516 .long ? # 4 bytes offset into rela.plt
517
518 Total = 32 bytes per PLT entry
519
520 The code for static build PLT entries looks like this:
521
522 PLT1: BASR 1,0 # 2 bytes
523 L 1,22(1) # 4 bytes Load address of GOT entry
524 L 1,0(0,1) # 4 bytes Load address from GOT in r1
525 BCR 15,1 # 2 bytes Jump to address
526 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
527 L 1,14(1) # 4 bytes Load offset in symbol table in r1
528 BRC 15,-x # 4 bytes Jump to start of PLT
529 .word 0 # 2 bytes filler
530 .long ? # 4 bytes address of GOT entry
531 .long ? # 4 bytes offset into rela.plt */
532
533 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
534 {
535 0x0d, 0x10, /* basr %r1,%r0 */
536 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
537 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
538 0x07, 0xf1, /* br %r1 */
539 0x0d, 0x10, /* basr %r1,%r0 */
540 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
541 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
542 0x00, 0x00, /* padding */
543 0x00, 0x00, 0x00, 0x00, /* GOT offset */
544 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
545 };
546
547 /* Generic PLT pic entry. */
548 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
549 {
550 0x0d, 0x10, /* basr %r1,%r0 */
551 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
552 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
553 0x07, 0xf1, /* br %r1 */
554 0x0d, 0x10, /* basr %r1,%r0 */
555 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
556 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
557 0x00, 0x00, /* padding */
558 0x00, 0x00, 0x00, 0x00, /* GOT offset */
559 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
560 };
561
562 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
563 when generating the PLT slot with the GOT offset. */
564 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
565 {
566 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
567 0x07, 0xf1, /* br %r1 */
568 0x00, 0x00, 0x00, 0x00, /* padding */
569 0x00, 0x00,
570 0x0d, 0x10, /* basr %r1,%r0 */
571 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
572 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
573 0x00, 0x00, 0x00, 0x00,
574 0x00, 0x00, 0x00, 0x00
575 };
576
577 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
578 when generating the PLT slot with the GOT offset. */
579 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
580 {
581 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
582 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
583 0x07, 0xf1, /* br %r1 */
584 0x00, 0x00,
585 0x0d, 0x10, /* basr %r1,%r0 */
586 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
587 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
588 0x00, 0x00, 0x00, 0x00,
589 0x00, 0x00, 0x00, 0x00,
590 0x00, 0x00
591 };
592
593 /* The first PLT entry pushes the offset into the rela.plt
594 from R1 onto the stack at 8(15) and the loader object info
595 at 12(15), loads the loader address in R1 and jumps to it. */
596
597 /* The first entry in the PLT for PIC code:
598
599 PLT0:
600 ST 1,28(15) # R1 has offset into rela.plt
601 L 1,4(12) # Get loader ino(object struct address)
602 ST 1,24(15) # Store address
603 L 1,8(12) # Entry address of loader in R1
604 BR 1 # Jump to loader
605
606 The first entry in the PLT for static code:
607
608 PLT0:
609 ST 1,28(15) # R1 has offset into rela.plt
610 BASR 1,0
611 L 1,18(0,1) # Get address of GOT
612 MVC 24(4,15),4(1) # Move loader ino to stack
613 L 1,8(1) # Get address of loader
614 BR 1 # Jump to loader
615 .word 0 # filler
616 .long got # address of GOT */
617
618 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
619 {
620 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
621 0x0d, 0x10, /* basr %r1,%r0 */
622 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
623 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
624 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
625 0x07, 0xf1, /* br %r1 */
626 0x00, 0x00, 0x00, 0x00,
627 0x00, 0x00, 0x00, 0x00,
628 0x00, 0x00
629 };
630
631 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
632 {
633 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
634 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
635 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
636 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
637 0x07, 0xf1, /* br %r1 */
638 0x00, 0x00, 0x00, 0x00,
639 0x00, 0x00, 0x00, 0x00,
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00
642 };
643
644
645 /* s390 ELF linker hash entry. */
646
647 struct elf_s390_link_hash_entry
648 {
649 struct elf_link_hash_entry elf;
650
651 /* Track dynamic relocs copied for this symbol. */
652 struct elf_dyn_relocs *dyn_relocs;
653
654 /* Number of GOTPLT references for a function. */
655 bfd_signed_vma gotplt_refcount;
656
657 #define GOT_UNKNOWN 0
658 #define GOT_NORMAL 1
659 #define GOT_TLS_GD 2
660 #define GOT_TLS_IE 3
661 #define GOT_TLS_IE_NLT 4
662 unsigned char tls_type;
663
664 /* For pointer equality reasons we might need to change the symbol
665 type from STT_GNU_IFUNC to STT_FUNC together with its value and
666 section entry. So after alloc_dynrelocs only these values should
667 be used. In order to check whether a symbol is IFUNC use
668 s390_is_ifunc_symbol_p. */
669 bfd_vma ifunc_resolver_address;
670 asection *ifunc_resolver_section;
671 };
672
673 #define elf_s390_hash_entry(ent) \
674 ((struct elf_s390_link_hash_entry *)(ent))
675
676 /* This structure represents an entry in the local PLT list needed for
677 local IFUNC symbols. */
678 struct plt_entry
679 {
680 /* The section of the local symbol.
681 Set in relocate_section and used in finish_dynamic_sections. */
682 asection *sec;
683
684 union
685 {
686 bfd_signed_vma refcount;
687 bfd_vma offset;
688 } plt;
689 };
690
691 /* NOTE: Keep this structure in sync with
692 the one declared in elf64-s390.c. */
693 struct elf_s390_obj_tdata
694 {
695 struct elf_obj_tdata root;
696
697 /* A local PLT is needed for ifunc symbols. */
698 struct plt_entry *local_plt;
699
700 /* TLS type for each local got entry. */
701 char *local_got_tls_type;
702 };
703
704 #define elf_s390_tdata(abfd) \
705 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
706
707 #define elf_s390_local_plt(abfd) \
708 (elf_s390_tdata (abfd)->local_plt)
709
710 #define elf_s390_local_got_tls_type(abfd) \
711 (elf_s390_tdata (abfd)->local_got_tls_type)
712
713 #define is_s390_elf(bfd) \
714 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
715 && elf_tdata (bfd) != NULL \
716 && elf_object_id (bfd) == S390_ELF_DATA)
717
718 static bfd_boolean
719 elf_s390_mkobject (bfd *abfd)
720 {
721 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
722 S390_ELF_DATA);
723 }
724
725 static bfd_boolean
726 elf_s390_object_p (bfd *abfd)
727 {
728 /* Set the right machine number for an s390 elf32 file. */
729 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
730 }
731
732 /* s390 ELF linker hash table. */
733
734 struct elf_s390_link_hash_table
735 {
736 struct elf_link_hash_table elf;
737
738 /* Short-cuts to get to dynamic linker sections. */
739 asection *sdynbss;
740 asection *srelbss;
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 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
820 shortcuts to them in our hash table. */
821
822 static bfd_boolean
823 create_got_section (bfd *dynobj, struct bfd_link_info *info)
824 {
825 struct elf_s390_link_hash_table *htab;
826
827 if (! _bfd_elf_create_got_section (dynobj, info))
828 return FALSE;
829
830 htab = elf_s390_hash_table (info);
831 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
832 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
833 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
834 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
835 abort ();
836
837 return TRUE;
838 }
839
840 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
841 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
842 hash table. */
843
844 static bfd_boolean
845 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
846 {
847 struct elf_s390_link_hash_table *htab;
848
849 htab = elf_s390_hash_table (info);
850 if (!htab->elf.sgot && !create_got_section (dynobj, info))
851 return FALSE;
852
853 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
854 return FALSE;
855
856 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
857 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
858 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
859 if (!info->shared)
860 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
861
862 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
863 || (!info->shared && !htab->srelbss))
864 abort ();
865
866 return TRUE;
867 }
868
869 /* Copy the extra info we tack onto an elf_link_hash_entry. */
870
871 static void
872 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
873 struct elf_link_hash_entry *dir,
874 struct elf_link_hash_entry *ind)
875 {
876 struct elf_s390_link_hash_entry *edir, *eind;
877
878 edir = (struct elf_s390_link_hash_entry *) dir;
879 eind = (struct elf_s390_link_hash_entry *) ind;
880
881 if (eind->dyn_relocs != NULL)
882 {
883 if (edir->dyn_relocs != NULL)
884 {
885 struct elf_dyn_relocs **pp;
886 struct elf_dyn_relocs *p;
887
888 /* Add reloc counts against the indirect sym to the direct sym
889 list. Merge any entries against the same section. */
890 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
891 {
892 struct elf_dyn_relocs *q;
893
894 for (q = edir->dyn_relocs; q != NULL; q = q->next)
895 if (q->sec == p->sec)
896 {
897 q->pc_count += p->pc_count;
898 q->count += p->count;
899 *pp = p->next;
900 break;
901 }
902 if (q == NULL)
903 pp = &p->next;
904 }
905 *pp = edir->dyn_relocs;
906 }
907
908 edir->dyn_relocs = eind->dyn_relocs;
909 eind->dyn_relocs = NULL;
910 }
911
912 if (ind->root.type == bfd_link_hash_indirect
913 && dir->got.refcount <= 0)
914 {
915 edir->tls_type = eind->tls_type;
916 eind->tls_type = GOT_UNKNOWN;
917 }
918
919 if (ELIMINATE_COPY_RELOCS
920 && ind->root.type != bfd_link_hash_indirect
921 && dir->dynamic_adjusted)
922 {
923 /* If called to transfer flags for a weakdef during processing
924 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
925 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
926 dir->ref_dynamic |= ind->ref_dynamic;
927 dir->ref_regular |= ind->ref_regular;
928 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
929 dir->needs_plt |= ind->needs_plt;
930 }
931 else
932 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
933 }
934
935 static int
936 elf_s390_tls_transition (struct bfd_link_info *info,
937 int r_type,
938 int is_local)
939 {
940 if (info->shared)
941 return r_type;
942
943 switch (r_type)
944 {
945 case R_390_TLS_GD32:
946 case R_390_TLS_IE32:
947 if (is_local)
948 return R_390_TLS_LE32;
949 return R_390_TLS_IE32;
950 case R_390_TLS_GOTIE32:
951 if (is_local)
952 return R_390_TLS_LE32;
953 return R_390_TLS_GOTIE32;
954 case R_390_TLS_LDM32:
955 return R_390_TLS_LE32;
956 }
957
958 return r_type;
959 }
960
961 /* Look through the relocs for a section during the first phase, and
962 allocate space in the global offset table or procedure linkage
963 table. */
964
965 static bfd_boolean
966 elf_s390_check_relocs (bfd *abfd,
967 struct bfd_link_info *info,
968 asection *sec,
969 const Elf_Internal_Rela *relocs)
970 {
971 struct elf_s390_link_hash_table *htab;
972 Elf_Internal_Shdr *symtab_hdr;
973 struct elf_link_hash_entry **sym_hashes;
974 const Elf_Internal_Rela *rel;
975 const Elf_Internal_Rela *rel_end;
976 asection *sreloc;
977 bfd_signed_vma *local_got_refcounts;
978 int tls_type, old_tls_type;
979 Elf_Internal_Sym *isym;
980
981 if (info->relocatable)
982 return TRUE;
983
984 BFD_ASSERT (is_s390_elf (abfd));
985
986 htab = elf_s390_hash_table (info);
987 symtab_hdr = &elf_symtab_hdr (abfd);
988 sym_hashes = elf_sym_hashes (abfd);
989 local_got_refcounts = elf_local_got_refcounts (abfd);
990
991 sreloc = NULL;
992
993 rel_end = relocs + sec->reloc_count;
994 for (rel = relocs; rel < rel_end; rel++)
995 {
996 unsigned int r_type;
997 unsigned long r_symndx;
998 struct elf_link_hash_entry *h;
999
1000 r_symndx = ELF32_R_SYM (rel->r_info);
1001
1002 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1003 {
1004 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1005 abfd, r_symndx);
1006 return FALSE;
1007 }
1008
1009 if (r_symndx < symtab_hdr->sh_info)
1010 {
1011 /* A local symbol. */
1012 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1013 abfd, r_symndx);
1014 if (isym == NULL)
1015 return FALSE;
1016
1017 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1018 {
1019 struct plt_entry *plt;
1020
1021 if (htab->elf.dynobj == NULL)
1022 htab->elf.dynobj = abfd;
1023
1024 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1025 return FALSE;
1026
1027 if (local_got_refcounts == NULL)
1028 {
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1030 return FALSE;
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1032 }
1033 plt = elf_s390_local_plt (abfd);
1034 plt[r_symndx].plt.refcount++;
1035 }
1036 h = NULL;
1037 }
1038 else
1039 {
1040 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1041 while (h->root.type == bfd_link_hash_indirect
1042 || h->root.type == bfd_link_hash_warning)
1043 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1044
1045 /* PR15323, ref flags aren't set for references in the same
1046 object. */
1047 h->root.non_ir_ref = 1;
1048 }
1049
1050 /* Create got section and local_got_refcounts array if they
1051 are needed. */
1052 r_type = elf_s390_tls_transition (info,
1053 ELF32_R_TYPE (rel->r_info),
1054 h == NULL);
1055 switch (r_type)
1056 {
1057 case R_390_GOT12:
1058 case R_390_GOT16:
1059 case R_390_GOT20:
1060 case R_390_GOT32:
1061 case R_390_GOTENT:
1062 case R_390_GOTPLT12:
1063 case R_390_GOTPLT16:
1064 case R_390_GOTPLT20:
1065 case R_390_GOTPLT32:
1066 case R_390_GOTPLTENT:
1067 case R_390_TLS_GD32:
1068 case R_390_TLS_GOTIE12:
1069 case R_390_TLS_GOTIE20:
1070 case R_390_TLS_GOTIE32:
1071 case R_390_TLS_IEENT:
1072 case R_390_TLS_IE32:
1073 case R_390_TLS_LDM32:
1074 if (h == NULL
1075 && local_got_refcounts == NULL)
1076 {
1077 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1078 return FALSE;
1079 local_got_refcounts = elf_local_got_refcounts (abfd);
1080 }
1081 /* Fall through. */
1082 case R_390_GOTOFF16:
1083 case R_390_GOTOFF32:
1084 case R_390_GOTPC:
1085 case R_390_GOTPCDBL:
1086 if (htab->elf.sgot == NULL)
1087 {
1088 if (htab->elf.dynobj == NULL)
1089 htab->elf.dynobj = abfd;
1090 if (!create_got_section (htab->elf.dynobj, info))
1091 return FALSE;
1092 }
1093 }
1094
1095 if (h != NULL)
1096 {
1097 if (htab->elf.dynobj == NULL)
1098 htab->elf.dynobj = abfd;
1099 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1100 return FALSE;
1101
1102 /* Make sure an IFUNC symbol defined in a non-shared object
1103 always gets a PLT slot. */
1104 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1105 {
1106 /* The symbol is called by the dynamic loader in order
1107 to resolve the relocation. So it is in fact also
1108 referenced. */
1109 h->ref_regular = 1;
1110 h->needs_plt = 1;
1111 }
1112 }
1113 switch (r_type)
1114 {
1115 case R_390_GOTOFF16:
1116 case R_390_GOTOFF32:
1117 case R_390_GOTPC:
1118 case R_390_GOTPCDBL:
1119 /* These relocs do not need a GOT slot. They just load the
1120 GOT pointer itself or address something else relative to
1121 the GOT. Since the GOT pointer has been set up above we
1122 are done. */
1123 break;
1124
1125 case R_390_PLT12DBL:
1126 case R_390_PLT16DBL:
1127 case R_390_PLT24DBL:
1128 case R_390_PLT32DBL:
1129 case R_390_PLT32:
1130 case R_390_PLTOFF16:
1131 case R_390_PLTOFF32:
1132 /* This symbol requires a procedure linkage table entry. We
1133 actually build the entry in adjust_dynamic_symbol,
1134 because this might be a case of linking PIC code which is
1135 never referenced by a dynamic object, in which case we
1136 don't need to generate a procedure linkage table entry
1137 after all. */
1138
1139 /* If this is a local symbol, we resolve it directly without
1140 creating a procedure linkage table entry. */
1141 if (h != NULL)
1142 {
1143 h->needs_plt = 1;
1144 h->plt.refcount += 1;
1145 }
1146 break;
1147
1148 case R_390_GOTPLT12:
1149 case R_390_GOTPLT16:
1150 case R_390_GOTPLT20:
1151 case R_390_GOTPLT32:
1152 case R_390_GOTPLTENT:
1153 /* This symbol requires either a procedure linkage table entry
1154 or an entry in the local got. We actually build the entry
1155 in adjust_dynamic_symbol because whether this is really a
1156 global reference can change and with it the fact if we have
1157 to create a plt entry or a local got entry. To be able to
1158 make a once global symbol a local one we have to keep track
1159 of the number of gotplt references that exist for this
1160 symbol. */
1161 if (h != NULL)
1162 {
1163 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1164 h->needs_plt = 1;
1165 h->plt.refcount += 1;
1166 }
1167 else
1168 local_got_refcounts[r_symndx] += 1;
1169 break;
1170
1171 case R_390_TLS_LDM32:
1172 htab->tls_ldm_got.refcount += 1;
1173 break;
1174
1175 case R_390_TLS_IE32:
1176 case R_390_TLS_GOTIE12:
1177 case R_390_TLS_GOTIE20:
1178 case R_390_TLS_GOTIE32:
1179 case R_390_TLS_IEENT:
1180 if (info->shared)
1181 info->flags |= DF_STATIC_TLS;
1182 /* Fall through. */
1183
1184 case R_390_GOT12:
1185 case R_390_GOT16:
1186 case R_390_GOT20:
1187 case R_390_GOT32:
1188 case R_390_GOTENT:
1189 case R_390_TLS_GD32:
1190 /* This symbol requires a global offset table entry. */
1191 switch (r_type)
1192 {
1193 default:
1194 case R_390_GOT12:
1195 case R_390_GOT16:
1196 case R_390_GOT20:
1197 case R_390_GOT32:
1198 case R_390_GOTENT:
1199 tls_type = GOT_NORMAL;
1200 break;
1201 case R_390_TLS_GD32:
1202 tls_type = GOT_TLS_GD;
1203 break;
1204 case R_390_TLS_IE32:
1205 case R_390_TLS_GOTIE32:
1206 tls_type = GOT_TLS_IE;
1207 break;
1208 case R_390_TLS_GOTIE12:
1209 case R_390_TLS_GOTIE20:
1210 case R_390_TLS_IEENT:
1211 tls_type = GOT_TLS_IE_NLT;
1212 break;
1213 }
1214
1215 if (h != NULL)
1216 {
1217 h->got.refcount += 1;
1218 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1219 }
1220 else
1221 {
1222 local_got_refcounts[r_symndx] += 1;
1223 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1224 }
1225 /* If a TLS symbol is accessed using IE at least once,
1226 there is no point to use dynamic model for it. */
1227 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1228 {
1229 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1230 {
1231 (*_bfd_error_handler)
1232 (_("%B: `%s' accessed both as normal and thread local symbol"),
1233 abfd, h->root.root.string);
1234 return FALSE;
1235 }
1236 if (old_tls_type > tls_type)
1237 tls_type = old_tls_type;
1238 }
1239
1240 if (old_tls_type != tls_type)
1241 {
1242 if (h != NULL)
1243 elf_s390_hash_entry (h)->tls_type = tls_type;
1244 else
1245 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1246 }
1247
1248 if (r_type != R_390_TLS_IE32)
1249 break;
1250 /* Fall through. */
1251
1252 case R_390_TLS_LE32:
1253 if (!info->shared)
1254 break;
1255 info->flags |= DF_STATIC_TLS;
1256 /* Fall through. */
1257
1258 case R_390_8:
1259 case R_390_16:
1260 case R_390_32:
1261 case R_390_PC16:
1262 case R_390_PC12DBL:
1263 case R_390_PC16DBL:
1264 case R_390_PC24DBL:
1265 case R_390_PC32DBL:
1266 case R_390_PC32:
1267 if (h != NULL)
1268 {
1269 /* If this reloc is in a read-only section, we might
1270 need a copy reloc. We can't check reliably at this
1271 stage whether the section is read-only, as input
1272 sections have not yet been mapped to output sections.
1273 Tentatively set the flag for now, and correct in
1274 adjust_dynamic_symbol. */
1275 h->non_got_ref = 1;
1276
1277 if (!info->shared)
1278 {
1279 /* We may need a .plt entry if the function this reloc
1280 refers to is in a shared lib. */
1281 h->plt.refcount += 1;
1282 }
1283 }
1284
1285 /* If we are creating a shared library, and this is a reloc
1286 against a global symbol, or a non PC relative reloc
1287 against a local symbol, then we need to copy the reloc
1288 into the shared library. However, if we are linking with
1289 -Bsymbolic, we do not need to copy a reloc against a
1290 global symbol which is defined in an object we are
1291 including in the link (i.e., DEF_REGULAR is set). At
1292 this point we have not seen all the input files, so it is
1293 possible that DEF_REGULAR is not set now but will be set
1294 later (it is never cleared). In case of a weak definition,
1295 DEF_REGULAR may be cleared later by a strong definition in
1296 a shared library. We account for that possibility below by
1297 storing information in the relocs_copied field of the hash
1298 table entry. A similar situation occurs when creating
1299 shared libraries and symbol visibility changes render the
1300 symbol local.
1301
1302 If on the other hand, we are creating an executable, we
1303 may need to keep relocations for symbols satisfied by a
1304 dynamic library if we manage to avoid copy relocs for the
1305 symbol. */
1306 if ((info->shared
1307 && (sec->flags & SEC_ALLOC) != 0
1308 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1309 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1310 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1311 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1312 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1313 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1314 || (h != NULL
1315 && (! SYMBOLIC_BIND (info, h)
1316 || h->root.type == bfd_link_hash_defweak
1317 || !h->def_regular))))
1318 || (ELIMINATE_COPY_RELOCS
1319 && !info->shared
1320 && (sec->flags & SEC_ALLOC) != 0
1321 && h != NULL
1322 && (h->root.type == bfd_link_hash_defweak
1323 || !h->def_regular)))
1324 {
1325 struct elf_dyn_relocs *p;
1326 struct elf_dyn_relocs **head;
1327
1328 /* We must copy these reloc types into the output file.
1329 Create a reloc section in dynobj and make room for
1330 this reloc. */
1331 if (sreloc == NULL)
1332 {
1333 if (htab->elf.dynobj == NULL)
1334 htab->elf.dynobj = abfd;
1335
1336 sreloc = _bfd_elf_make_dynamic_reloc_section
1337 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1338
1339 if (sreloc == NULL)
1340 return FALSE;
1341 }
1342
1343 /* If this is a global symbol, we count the number of
1344 relocations we need for this symbol. */
1345 if (h != NULL)
1346 {
1347 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1348 }
1349 else
1350 {
1351 /* Track dynamic relocs needed for local syms too.
1352 We really need local syms available to do this
1353 easily. Oh well. */
1354 asection *s;
1355 void *vpp;
1356
1357 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1358 abfd, r_symndx);
1359 if (isym == NULL)
1360 return FALSE;
1361
1362 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1363 if (s == NULL)
1364 s = sec;
1365
1366 vpp = &elf_section_data (s)->local_dynrel;
1367 head = (struct elf_dyn_relocs **) vpp;
1368 }
1369
1370 p = *head;
1371 if (p == NULL || p->sec != sec)
1372 {
1373 bfd_size_type amt = sizeof *p;
1374
1375 p = ((struct elf_dyn_relocs *)
1376 bfd_alloc (htab->elf.dynobj, amt));
1377 if (p == NULL)
1378 return FALSE;
1379 p->next = *head;
1380 *head = p;
1381 p->sec = sec;
1382 p->count = 0;
1383 p->pc_count = 0;
1384 }
1385
1386 p->count += 1;
1387 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1388 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1389 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1390 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1391 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1392 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1393 p->pc_count += 1;
1394 }
1395 break;
1396
1397 /* This relocation describes the C++ object vtable hierarchy.
1398 Reconstruct it for later use during GC. */
1399 case R_390_GNU_VTINHERIT:
1400 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1401 return FALSE;
1402 break;
1403
1404 /* This relocation describes which C++ vtable entries are actually
1405 used. Record for later use during GC. */
1406 case R_390_GNU_VTENTRY:
1407 BFD_ASSERT (h != NULL);
1408 if (h != NULL
1409 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1410 return FALSE;
1411 break;
1412
1413 default:
1414 break;
1415 }
1416 }
1417
1418 return TRUE;
1419 }
1420
1421 /* Return the section that should be marked against GC for a given
1422 relocation. */
1423
1424 static asection *
1425 elf_s390_gc_mark_hook (asection *sec,
1426 struct bfd_link_info *info,
1427 Elf_Internal_Rela *rel,
1428 struct elf_link_hash_entry *h,
1429 Elf_Internal_Sym *sym)
1430 {
1431 if (h != NULL)
1432 switch (ELF32_R_TYPE (rel->r_info))
1433 {
1434 case R_390_GNU_VTINHERIT:
1435 case R_390_GNU_VTENTRY:
1436 return NULL;
1437 }
1438 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1439
1440 }
1441
1442 /* Update the got entry reference counts for the section being removed. */
1443
1444 static bfd_boolean
1445 elf_s390_gc_sweep_hook (bfd *abfd,
1446 struct bfd_link_info *info,
1447 asection *sec,
1448 const Elf_Internal_Rela *relocs)
1449 {
1450 struct elf_s390_link_hash_table *htab;
1451 Elf_Internal_Shdr *symtab_hdr;
1452 struct elf_link_hash_entry **sym_hashes;
1453 bfd_signed_vma *local_got_refcounts;
1454 const Elf_Internal_Rela *rel, *relend;
1455
1456 if (info->relocatable)
1457 return TRUE;
1458
1459 htab = elf_s390_hash_table (info);
1460 if (htab == NULL)
1461 return FALSE;
1462
1463 elf_section_data (sec)->local_dynrel = NULL;
1464
1465 symtab_hdr = &elf_symtab_hdr (abfd);
1466 sym_hashes = elf_sym_hashes (abfd);
1467 local_got_refcounts = elf_local_got_refcounts (abfd);
1468
1469 relend = relocs + sec->reloc_count;
1470 for (rel = relocs; rel < relend; rel++)
1471 {
1472 unsigned long r_symndx;
1473 unsigned int r_type;
1474 struct elf_link_hash_entry *h = NULL;
1475
1476 r_symndx = ELF32_R_SYM (rel->r_info);
1477 if (r_symndx >= symtab_hdr->sh_info)
1478 {
1479 struct elf_s390_link_hash_entry *eh;
1480 struct elf_dyn_relocs **pp;
1481 struct elf_dyn_relocs *p;
1482
1483 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1484 while (h->root.type == bfd_link_hash_indirect
1485 || h->root.type == bfd_link_hash_warning)
1486 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1487 eh = (struct elf_s390_link_hash_entry *) h;
1488
1489 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1490 if (p->sec == sec)
1491 {
1492 /* Everything must go for SEC. */
1493 *pp = p->next;
1494 break;
1495 }
1496 }
1497 else
1498 {
1499 Elf_Internal_Sym *isym;
1500
1501 /* A local symbol. */
1502 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1503 abfd, r_symndx);
1504 if (isym == NULL)
1505 return FALSE;
1506
1507 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1508 {
1509 struct plt_entry *plt = elf_s390_local_plt (abfd);
1510 if (plt[r_symndx].plt.refcount > 0)
1511 plt[r_symndx].plt.refcount--;
1512 }
1513 }
1514
1515 r_type = ELF32_R_TYPE (rel->r_info);
1516 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1517 switch (r_type)
1518 {
1519 case R_390_TLS_LDM32:
1520 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1521 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1522 break;
1523
1524 case R_390_TLS_GD32:
1525 case R_390_TLS_IE32:
1526 case R_390_TLS_GOTIE12:
1527 case R_390_TLS_GOTIE20:
1528 case R_390_TLS_GOTIE32:
1529 case R_390_TLS_IEENT:
1530 case R_390_GOT12:
1531 case R_390_GOT16:
1532 case R_390_GOT20:
1533 case R_390_GOT32:
1534 case R_390_GOTOFF16:
1535 case R_390_GOTOFF32:
1536 case R_390_GOTPC:
1537 case R_390_GOTPCDBL:
1538 case R_390_GOTENT:
1539 if (h != NULL)
1540 {
1541 if (h->got.refcount > 0)
1542 h->got.refcount -= 1;
1543 }
1544 else if (local_got_refcounts != NULL)
1545 {
1546 if (local_got_refcounts[r_symndx] > 0)
1547 local_got_refcounts[r_symndx] -= 1;
1548 }
1549 break;
1550
1551 case R_390_8:
1552 case R_390_12:
1553 case R_390_16:
1554 case R_390_20:
1555 case R_390_32:
1556 case R_390_PC16:
1557 case R_390_PC12DBL:
1558 case R_390_PC16DBL:
1559 case R_390_PC24DBL:
1560 case R_390_PC32DBL:
1561 case R_390_PC32:
1562 if (info->shared)
1563 break;
1564 /* Fall through. */
1565
1566 case R_390_PLT12DBL:
1567 case R_390_PLT16DBL:
1568 case R_390_PLT24DBL:
1569 case R_390_PLT32DBL:
1570 case R_390_PLT32:
1571 case R_390_PLTOFF16:
1572 case R_390_PLTOFF32:
1573 if (h != NULL)
1574 {
1575 if (h->plt.refcount > 0)
1576 h->plt.refcount -= 1;
1577 }
1578 break;
1579
1580 case R_390_GOTPLT12:
1581 case R_390_GOTPLT16:
1582 case R_390_GOTPLT20:
1583 case R_390_GOTPLT32:
1584 case R_390_GOTPLTENT:
1585 if (h != NULL)
1586 {
1587 if (h->plt.refcount > 0)
1588 {
1589 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1590 h->plt.refcount -= 1;
1591 }
1592 }
1593 else if (local_got_refcounts != NULL)
1594 {
1595 if (local_got_refcounts[r_symndx] > 0)
1596 local_got_refcounts[r_symndx] -= 1;
1597 }
1598 break;
1599
1600 default:
1601 break;
1602 }
1603 }
1604
1605 return TRUE;
1606 }
1607
1608 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1609 entry but we found we will not create any. Called when we find we will
1610 not have any PLT for this symbol, by for example
1611 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1612 or elf_s390_size_dynamic_sections if no dynamic sections will be
1613 created (we're only linking static objects). */
1614
1615 static void
1616 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1617 {
1618 if (h->elf.root.type == bfd_link_hash_warning)
1619 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1620
1621 if (h->gotplt_refcount <= 0)
1622 return;
1623
1624 /* We simply add the number of gotplt references to the number
1625 * of got references for this symbol. */
1626 h->elf.got.refcount += h->gotplt_refcount;
1627 h->gotplt_refcount = -1;
1628 }
1629
1630 /* Adjust a symbol defined by a dynamic object and referenced by a
1631 regular object. The current definition is in some section of the
1632 dynamic object, but we're not including those sections. We have to
1633 change the definition to something the rest of the link can
1634 understand. */
1635
1636 static bfd_boolean
1637 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1638 struct elf_link_hash_entry *h)
1639 {
1640 struct elf_s390_link_hash_table *htab;
1641 asection *s;
1642
1643 /* STT_GNU_IFUNC symbol must go through PLT. */
1644 if (s390_is_ifunc_symbol_p (h))
1645 return TRUE;
1646
1647 /* If this is a function, put it in the procedure linkage table. We
1648 will fill in the contents of the procedure linkage table later
1649 (although we could actually do it here). */
1650 if (h->type == STT_FUNC
1651 || h->needs_plt)
1652 {
1653 if (h->plt.refcount <= 0
1654 || SYMBOL_CALLS_LOCAL (info, h)
1655 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1656 && h->root.type != bfd_link_hash_undefweak))
1657 {
1658 /* This case can occur if we saw a PLT32 reloc in an input
1659 file, but the symbol was never referred to by a dynamic
1660 object, or if all references were garbage collected. In
1661 such a case, we don't actually need to build a procedure
1662 linkage table, and we can just do a PC32 reloc instead. */
1663 h->plt.offset = (bfd_vma) -1;
1664 h->needs_plt = 0;
1665 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1666 }
1667
1668 return TRUE;
1669 }
1670 else
1671 /* It's possible that we incorrectly decided a .plt reloc was
1672 needed for an R_390_PC32 reloc to a non-function sym in
1673 check_relocs. We can't decide accurately between function and
1674 non-function syms in check-relocs; Objects loaded later in
1675 the link may change h->type. So fix it now. */
1676 h->plt.offset = (bfd_vma) -1;
1677
1678 /* If this is a weak symbol, and there is a real definition, the
1679 processor independent code will have arranged for us to see the
1680 real definition first, and we can just use the same value. */
1681 if (h->u.weakdef != NULL)
1682 {
1683 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1684 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1685 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1686 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1687 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1688 h->non_got_ref = h->u.weakdef->non_got_ref;
1689 return TRUE;
1690 }
1691
1692 /* This is a reference to a symbol defined by a dynamic object which
1693 is not a function. */
1694
1695 /* If we are creating a shared library, we must presume that the
1696 only references to the symbol are via the global offset table.
1697 For such cases we need not do anything here; the relocations will
1698 be handled correctly by relocate_section. */
1699 if (info->shared)
1700 return TRUE;
1701
1702 /* If there are no references to this symbol that do not use the
1703 GOT, we don't need to generate a copy reloc. */
1704 if (!h->non_got_ref)
1705 return TRUE;
1706
1707 /* If -z nocopyreloc was given, we won't generate them either. */
1708 if (info->nocopyreloc)
1709 {
1710 h->non_got_ref = 0;
1711 return TRUE;
1712 }
1713
1714 if (ELIMINATE_COPY_RELOCS)
1715 {
1716 struct elf_s390_link_hash_entry * eh;
1717 struct elf_dyn_relocs *p;
1718
1719 eh = (struct elf_s390_link_hash_entry *) h;
1720 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1721 {
1722 s = p->sec->output_section;
1723 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1724 break;
1725 }
1726
1727 /* If we didn't find any dynamic relocs in read-only sections, then
1728 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1729 if (p == NULL)
1730 {
1731 h->non_got_ref = 0;
1732 return TRUE;
1733 }
1734 }
1735
1736 /* We must allocate the symbol in our .dynbss section, which will
1737 become part of the .bss section of the executable. There will be
1738 an entry for this symbol in the .dynsym section. The dynamic
1739 object will contain position independent code, so all references
1740 from the dynamic object to this symbol will go through the global
1741 offset table. The dynamic linker will use the .dynsym entry to
1742 determine the address it must put in the global offset table, so
1743 both the dynamic object and the regular object will refer to the
1744 same memory location for the variable. */
1745
1746 htab = elf_s390_hash_table (info);
1747
1748 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1749 copy the initial value out of the dynamic object and into the
1750 runtime process image. */
1751 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1752 {
1753 htab->srelbss->size += sizeof (Elf32_External_Rela);
1754 h->needs_copy = 1;
1755 }
1756
1757 s = htab->sdynbss;
1758
1759 return _bfd_elf_adjust_dynamic_copy (h, s);
1760 }
1761
1762 /* Allocate space in .plt, .got and associated reloc sections for
1763 dynamic relocs. */
1764
1765 static bfd_boolean
1766 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1767 {
1768 struct bfd_link_info *info;
1769 struct elf_s390_link_hash_table *htab;
1770 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1771 struct elf_dyn_relocs *p;
1772
1773 if (h->root.type == bfd_link_hash_indirect)
1774 return TRUE;
1775
1776 info = (struct bfd_link_info *) inf;
1777 htab = elf_s390_hash_table (info);
1778
1779 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1780 here if it is defined and referenced in a non-shared object. */
1781 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1782 return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1783 &eh->dyn_relocs);
1784 else if (htab->elf.dynamic_sections_created
1785 && h->plt.refcount > 0)
1786 {
1787 /* Make sure this symbol is output as a dynamic symbol.
1788 Undefined weak syms won't yet be marked as dynamic. */
1789 if (h->dynindx == -1
1790 && !h->forced_local)
1791 {
1792 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1793 return FALSE;
1794 }
1795
1796 if (info->shared
1797 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1798 {
1799 asection *s = htab->elf.splt;
1800
1801 /* If this is the first .plt entry, make room for the special
1802 first entry. */
1803 if (s->size == 0)
1804 s->size += PLT_FIRST_ENTRY_SIZE;
1805
1806 h->plt.offset = s->size;
1807
1808 /* If this symbol is not defined in a regular file, and we are
1809 not generating a shared library, then set the symbol to this
1810 location in the .plt. This is required to make function
1811 pointers compare as equal between the normal executable and
1812 the shared library. */
1813 if (! info->shared
1814 && !h->def_regular)
1815 {
1816 h->root.u.def.section = s;
1817 h->root.u.def.value = h->plt.offset;
1818 }
1819
1820 /* Make room for this entry. */
1821 s->size += PLT_ENTRY_SIZE;
1822
1823 /* We also need to make an entry in the .got.plt section, which
1824 will be placed in the .got section by the linker script. */
1825 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1826
1827 /* We also need to make an entry in the .rela.plt section. */
1828 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1829 }
1830 else
1831 {
1832 h->plt.offset = (bfd_vma) -1;
1833 h->needs_plt = 0;
1834 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1835 }
1836 }
1837 else
1838 {
1839 h->plt.offset = (bfd_vma) -1;
1840 h->needs_plt = 0;
1841 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1842 }
1843
1844 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1845 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1846 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1847 we can save the dynamic TLS relocation. */
1848 if (h->got.refcount > 0
1849 && !info->shared
1850 && h->dynindx == -1
1851 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1852 {
1853 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1854 /* For the GOTIE access without a literal pool entry the offset has
1855 to be stored somewhere. The immediate value in the instruction
1856 is not bit enough so the value is stored in the got. */
1857 {
1858 h->got.offset = htab->elf.sgot->size;
1859 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1860 }
1861 else
1862 h->got.offset = (bfd_vma) -1;
1863 }
1864 else if (h->got.refcount > 0)
1865 {
1866 asection *s;
1867 bfd_boolean dyn;
1868 int tls_type = elf_s390_hash_entry(h)->tls_type;
1869
1870 /* Make sure this symbol is output as a dynamic symbol.
1871 Undefined weak syms won't yet be marked as dynamic. */
1872 if (h->dynindx == -1
1873 && !h->forced_local)
1874 {
1875 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1876 return FALSE;
1877 }
1878
1879 s = htab->elf.sgot;
1880 h->got.offset = s->size;
1881 s->size += GOT_ENTRY_SIZE;
1882 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1883 if (tls_type == GOT_TLS_GD)
1884 s->size += GOT_ENTRY_SIZE;
1885 dyn = htab->elf.dynamic_sections_created;
1886 /* R_390_TLS_IE32 needs one dynamic relocation,
1887 R_390_TLS_GD32 needs one if local symbol and two if global. */
1888 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1889 || tls_type >= GOT_TLS_IE)
1890 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1891 else if (tls_type == GOT_TLS_GD)
1892 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1893 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1894 || h->root.type != bfd_link_hash_undefweak)
1895 && (info->shared
1896 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1897 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1898 }
1899 else
1900 h->got.offset = (bfd_vma) -1;
1901
1902 if (eh->dyn_relocs == NULL)
1903 return TRUE;
1904
1905 /* In the shared -Bsymbolic case, discard space allocated for
1906 dynamic pc-relative relocs against symbols which turn out to be
1907 defined in regular objects. For the normal shared case, discard
1908 space for pc-relative relocs that have become local due to symbol
1909 visibility changes. */
1910
1911 if (info->shared)
1912 {
1913 if (SYMBOL_CALLS_LOCAL (info, h))
1914 {
1915 struct elf_dyn_relocs **pp;
1916
1917 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1918 {
1919 p->count -= p->pc_count;
1920 p->pc_count = 0;
1921 if (p->count == 0)
1922 *pp = p->next;
1923 else
1924 pp = &p->next;
1925 }
1926 }
1927
1928 /* Also discard relocs on undefined weak syms with non-default
1929 visibility. */
1930 if (eh->dyn_relocs != NULL
1931 && h->root.type == bfd_link_hash_undefweak)
1932 {
1933 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1934 eh->dyn_relocs = NULL;
1935
1936 /* Make sure undefined weak symbols are output as a dynamic
1937 symbol in PIEs. */
1938 else if (h->dynindx == -1
1939 && !h->forced_local)
1940 {
1941 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1942 return FALSE;
1943 }
1944 }
1945 }
1946 else if (ELIMINATE_COPY_RELOCS)
1947 {
1948 /* For the non-shared case, discard space for relocs against
1949 symbols which turn out to need copy relocs or are not
1950 dynamic. */
1951
1952 if (!h->non_got_ref
1953 && ((h->def_dynamic
1954 && !h->def_regular)
1955 || (htab->elf.dynamic_sections_created
1956 && (h->root.type == bfd_link_hash_undefweak
1957 || h->root.type == bfd_link_hash_undefined))))
1958 {
1959 /* Make sure this symbol is output as a dynamic symbol.
1960 Undefined weak syms won't yet be marked as dynamic. */
1961 if (h->dynindx == -1
1962 && !h->forced_local)
1963 {
1964 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1965 return FALSE;
1966 }
1967
1968 /* If that succeeded, we know we'll be keeping all the
1969 relocs. */
1970 if (h->dynindx != -1)
1971 goto keep;
1972 }
1973
1974 eh->dyn_relocs = NULL;
1975
1976 keep: ;
1977 }
1978
1979 /* Finally, allocate space. */
1980 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1981 {
1982 asection *sreloc = elf_section_data (p->sec)->sreloc;
1983
1984 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1985 }
1986
1987 return TRUE;
1988 }
1989
1990 /* Find any dynamic relocs that apply to read-only sections. */
1991
1992 static bfd_boolean
1993 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1994 {
1995 struct elf_s390_link_hash_entry *eh;
1996 struct elf_dyn_relocs *p;
1997
1998 eh = (struct elf_s390_link_hash_entry *) h;
1999 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2000 {
2001 asection *s = p->sec->output_section;
2002
2003 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2004 {
2005 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2006
2007 info->flags |= DF_TEXTREL;
2008
2009 /* Not an error, just cut short the traversal. */
2010 return FALSE;
2011 }
2012 }
2013 return TRUE;
2014 }
2015
2016 /* Set the sizes of the dynamic sections. */
2017
2018 static bfd_boolean
2019 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2020 struct bfd_link_info *info)
2021 {
2022 struct elf_s390_link_hash_table *htab;
2023 bfd *dynobj;
2024 asection *s;
2025 bfd_boolean relocs;
2026 bfd *ibfd;
2027
2028 htab = elf_s390_hash_table (info);
2029 dynobj = htab->elf.dynobj;
2030 if (dynobj == NULL)
2031 abort ();
2032
2033 if (htab->elf.dynamic_sections_created)
2034 {
2035 /* Set the contents of the .interp section to the interpreter. */
2036 if (info->executable)
2037 {
2038 s = bfd_get_linker_section (dynobj, ".interp");
2039 if (s == NULL)
2040 abort ();
2041 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2042 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2043 }
2044 }
2045
2046 /* Set up .got offsets for local syms, and space for local dynamic
2047 relocs. */
2048 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2049 {
2050 bfd_signed_vma *local_got;
2051 bfd_signed_vma *end_local_got;
2052 char *local_tls_type;
2053 bfd_size_type locsymcount;
2054 Elf_Internal_Shdr *symtab_hdr;
2055 asection *srela;
2056 struct plt_entry *local_plt;
2057 unsigned int i;
2058
2059 if (! is_s390_elf (ibfd))
2060 continue;
2061
2062 for (s = ibfd->sections; s != NULL; s = s->next)
2063 {
2064 struct elf_dyn_relocs *p;
2065
2066 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2067 {
2068 if (!bfd_is_abs_section (p->sec)
2069 && bfd_is_abs_section (p->sec->output_section))
2070 {
2071 /* Input section has been discarded, either because
2072 it is a copy of a linkonce section or due to
2073 linker script /DISCARD/, so we'll be discarding
2074 the relocs too. */
2075 }
2076 else if (p->count != 0)
2077 {
2078 srela = elf_section_data (p->sec)->sreloc;
2079 srela->size += p->count * sizeof (Elf32_External_Rela);
2080 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2081 info->flags |= DF_TEXTREL;
2082 }
2083 }
2084 }
2085
2086 local_got = elf_local_got_refcounts (ibfd);
2087 if (!local_got)
2088 continue;
2089
2090 symtab_hdr = &elf_symtab_hdr (ibfd);
2091 locsymcount = symtab_hdr->sh_info;
2092 end_local_got = local_got + locsymcount;
2093 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2094 s = htab->elf.sgot;
2095 srela = htab->elf.srelgot;
2096 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2097 {
2098 if (*local_got > 0)
2099 {
2100 *local_got = s->size;
2101 s->size += GOT_ENTRY_SIZE;
2102 if (*local_tls_type == GOT_TLS_GD)
2103 s->size += GOT_ENTRY_SIZE;
2104 if (info->shared)
2105 srela->size += sizeof (Elf32_External_Rela);
2106 }
2107 else
2108 *local_got = (bfd_vma) -1;
2109 }
2110 local_plt = elf_s390_local_plt (ibfd);
2111 for (i = 0; i < symtab_hdr->sh_info; i++)
2112 {
2113 if (local_plt[i].plt.refcount > 0)
2114 {
2115 local_plt[i].plt.offset = htab->elf.iplt->size;
2116 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2117 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2118 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2119 }
2120 else
2121 local_plt[i].plt.offset = (bfd_vma) -1;
2122 }
2123 }
2124
2125 if (htab->tls_ldm_got.refcount > 0)
2126 {
2127 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2128 relocs. */
2129 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2130 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2131 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2132 }
2133 else
2134 htab->tls_ldm_got.offset = -1;
2135
2136 /* Allocate global sym .plt and .got entries, and space for global
2137 sym dynamic relocs. */
2138 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2139
2140 /* We now have determined the sizes of the various dynamic sections.
2141 Allocate memory for them. */
2142 relocs = FALSE;
2143 for (s = dynobj->sections; s != NULL; s = s->next)
2144 {
2145 if ((s->flags & SEC_LINKER_CREATED) == 0)
2146 continue;
2147
2148 if (s == htab->elf.splt
2149 || s == htab->elf.sgot
2150 || s == htab->elf.sgotplt
2151 || s == htab->sdynbss
2152 || s == htab->elf.iplt
2153 || s == htab->elf.igotplt
2154 || s == htab->irelifunc)
2155 {
2156 /* Strip this section if we don't need it; see the
2157 comment below. */
2158 }
2159 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2160 {
2161 if (s->size != 0)
2162 relocs = TRUE;
2163
2164 /* We use the reloc_count field as a counter if we need
2165 to copy relocs into the output file. */
2166 s->reloc_count = 0;
2167 }
2168 else
2169 {
2170 /* It's not one of our sections, so don't allocate space. */
2171 continue;
2172 }
2173
2174 if (s->size == 0)
2175 {
2176 /* If we don't need this section, strip it from the
2177 output file. This is to handle .rela.bss and
2178 .rela.plt. We must create it in
2179 create_dynamic_sections, because it must be created
2180 before the linker maps input sections to output
2181 sections. The linker does that before
2182 adjust_dynamic_symbol is called, and it is that
2183 function which decides whether anything needs to go
2184 into these sections. */
2185
2186 s->flags |= SEC_EXCLUDE;
2187 continue;
2188 }
2189
2190 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2191 continue;
2192
2193 /* Allocate memory for the section contents. We use bfd_zalloc
2194 here in case unused entries are not reclaimed before the
2195 section's contents are written out. This should not happen,
2196 but this way if it does, we get a R_390_NONE reloc instead
2197 of garbage. */
2198 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2199 if (s->contents == NULL)
2200 return FALSE;
2201 }
2202
2203 if (htab->elf.dynamic_sections_created)
2204 {
2205 /* Add some entries to the .dynamic section. We fill in the
2206 values later, in elf_s390_finish_dynamic_sections, but we
2207 must add the entries now so that we get the correct size for
2208 the .dynamic section. The DT_DEBUG entry is filled in by the
2209 dynamic linker and used by the debugger. */
2210 #define add_dynamic_entry(TAG, VAL) \
2211 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2212
2213 if (info->executable)
2214 {
2215 if (!add_dynamic_entry (DT_DEBUG, 0))
2216 return FALSE;
2217 }
2218
2219 if (htab->elf.splt->size != 0)
2220 {
2221 if (!add_dynamic_entry (DT_PLTGOT, 0)
2222 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2223 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2224 || !add_dynamic_entry (DT_JMPREL, 0))
2225 return FALSE;
2226 }
2227
2228 if (relocs)
2229 {
2230 if (!add_dynamic_entry (DT_RELA, 0)
2231 || !add_dynamic_entry (DT_RELASZ, 0)
2232 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2233 return FALSE;
2234
2235 /* If any dynamic relocs apply to a read-only section,
2236 then we need a DT_TEXTREL entry. */
2237 if ((info->flags & DF_TEXTREL) == 0)
2238 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2239
2240 if ((info->flags & DF_TEXTREL) != 0)
2241 {
2242 if (!add_dynamic_entry (DT_TEXTREL, 0))
2243 return FALSE;
2244 }
2245 }
2246 }
2247 #undef add_dynamic_entry
2248
2249 return TRUE;
2250 }
2251
2252 /* Return the base VMA address which should be subtracted from real addresses
2253 when resolving @dtpoff relocation.
2254 This is PT_TLS segment p_vaddr. */
2255
2256 static bfd_vma
2257 dtpoff_base (struct bfd_link_info *info)
2258 {
2259 /* If tls_sec is NULL, we should have signalled an error already. */
2260 if (elf_hash_table (info)->tls_sec == NULL)
2261 return 0;
2262 return elf_hash_table (info)->tls_sec->vma;
2263 }
2264
2265 /* Return the relocation value for @tpoff relocation
2266 if STT_TLS virtual address is ADDRESS. */
2267
2268 static bfd_vma
2269 tpoff (struct bfd_link_info *info, bfd_vma address)
2270 {
2271 struct elf_link_hash_table *htab = elf_hash_table (info);
2272
2273 /* If tls_sec is NULL, we should have signalled an error already. */
2274 if (htab->tls_sec == NULL)
2275 return 0;
2276 return htab->tls_size + htab->tls_sec->vma - address;
2277 }
2278
2279 /* Complain if TLS instruction relocation is against an invalid
2280 instruction. */
2281
2282 static void
2283 invalid_tls_insn (bfd *input_bfd,
2284 asection *input_section,
2285 Elf_Internal_Rela *rel)
2286 {
2287 reloc_howto_type *howto;
2288
2289 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2290 (*_bfd_error_handler)
2291 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2292 input_bfd,
2293 input_section,
2294 (long) rel->r_offset,
2295 howto->name);
2296 bfd_set_error (bfd_error_bad_value);
2297 }
2298
2299 /* Relocate a 390 ELF section. */
2300
2301 static bfd_boolean
2302 elf_s390_relocate_section (bfd *output_bfd,
2303 struct bfd_link_info *info,
2304 bfd *input_bfd,
2305 asection *input_section,
2306 bfd_byte *contents,
2307 Elf_Internal_Rela *relocs,
2308 Elf_Internal_Sym *local_syms,
2309 asection **local_sections)
2310 {
2311 struct elf_s390_link_hash_table *htab;
2312 Elf_Internal_Shdr *symtab_hdr;
2313 struct elf_link_hash_entry **sym_hashes;
2314 bfd_vma *local_got_offsets;
2315 Elf_Internal_Rela *rel;
2316 Elf_Internal_Rela *relend;
2317
2318 BFD_ASSERT (is_s390_elf (input_bfd));
2319
2320 htab = elf_s390_hash_table (info);
2321 symtab_hdr = &elf_symtab_hdr (input_bfd);
2322 sym_hashes = elf_sym_hashes (input_bfd);
2323 local_got_offsets = elf_local_got_offsets (input_bfd);
2324
2325 rel = relocs;
2326 relend = relocs + input_section->reloc_count;
2327 for (; rel < relend; rel++)
2328 {
2329 unsigned int r_type;
2330 reloc_howto_type *howto;
2331 unsigned long r_symndx;
2332 struct elf_link_hash_entry *h;
2333 Elf_Internal_Sym *sym;
2334 asection *sec;
2335 bfd_vma off;
2336 bfd_vma relocation;
2337 bfd_boolean unresolved_reloc;
2338 bfd_reloc_status_type r;
2339 int tls_type;
2340 asection *base_got = htab->elf.sgot;
2341
2342 r_type = ELF32_R_TYPE (rel->r_info);
2343 if (r_type == (int) R_390_GNU_VTINHERIT
2344 || r_type == (int) R_390_GNU_VTENTRY)
2345 continue;
2346 if (r_type >= (int) R_390_max)
2347 {
2348 bfd_set_error (bfd_error_bad_value);
2349 return FALSE;
2350 }
2351
2352 howto = elf_howto_table + r_type;
2353 r_symndx = ELF32_R_SYM (rel->r_info);
2354
2355 h = NULL;
2356 sym = NULL;
2357 sec = NULL;
2358 unresolved_reloc = FALSE;
2359 if (r_symndx < symtab_hdr->sh_info)
2360 {
2361 sym = local_syms + r_symndx;
2362 sec = local_sections[r_symndx];
2363 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2364 {
2365 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2366 if (local_plt == NULL)
2367 return FALSE;
2368
2369 /* Address of the PLT slot. */
2370 relocation = (htab->elf.iplt->output_section->vma
2371 + htab->elf.iplt->output_offset
2372 + local_plt[r_symndx].plt.offset);
2373
2374 switch (r_type)
2375 {
2376 case R_390_PLTOFF16:
2377 case R_390_PLTOFF32:
2378 relocation -= htab->elf.sgot->output_section->vma;
2379 break;
2380 case R_390_GOTPLT12:
2381 case R_390_GOTPLT16:
2382 case R_390_GOTPLT20:
2383 case R_390_GOTPLT32:
2384 case R_390_GOTPLTENT:
2385 case R_390_GOT12:
2386 case R_390_GOT16:
2387 case R_390_GOT20:
2388 case R_390_GOT32:
2389 case R_390_GOTENT:
2390 {
2391 /* Write the PLT slot address into the GOT slot. */
2392 bfd_put_32 (output_bfd, relocation,
2393 htab->elf.sgot->contents +
2394 local_got_offsets[r_symndx]);
2395 relocation = (local_got_offsets[r_symndx] +
2396 htab->elf.sgot->output_offset);
2397
2398 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2399 relocation += htab->elf.sgot->output_section->vma;
2400 break;
2401 }
2402 default:
2403 break;
2404 }
2405 /* The output section is needed later in
2406 finish_dynamic_section when creating the dynamic
2407 relocation. */
2408 local_plt[r_symndx].sec = sec;
2409 goto do_relocation;
2410 }
2411 else
2412 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2413 }
2414 else
2415 {
2416 bfd_boolean warned ATTRIBUTE_UNUSED;
2417 bfd_boolean ignored ATTRIBUTE_UNUSED;
2418
2419 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2420 r_symndx, symtab_hdr, sym_hashes,
2421 h, sec, relocation,
2422 unresolved_reloc, warned, ignored);
2423 }
2424
2425 if (sec != NULL && discarded_section (sec))
2426 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2427 rel, 1, relend, howto, 0, contents);
2428
2429 if (info->relocatable)
2430 continue;
2431
2432 switch (r_type)
2433 {
2434 case R_390_GOTPLT12:
2435 case R_390_GOTPLT16:
2436 case R_390_GOTPLT20:
2437 case R_390_GOTPLT32:
2438 case R_390_GOTPLTENT:
2439 /* There are three cases for a GOTPLT relocation. 1) The
2440 relocation is against the jump slot entry of a plt that
2441 will get emitted to the output file. 2) The relocation
2442 is against the jump slot of a plt entry that has been
2443 removed. elf_s390_adjust_gotplt has created a GOT entry
2444 as replacement. 3) The relocation is against a local symbol.
2445 Cases 2) and 3) are the same as the GOT relocation code
2446 so we just have to test for case 1 and fall through for
2447 the other two. */
2448 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2449 {
2450 bfd_vma plt_index;
2451
2452 if (s390_is_ifunc_symbol_p (h))
2453 {
2454 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2455 relocation = (plt_index * GOT_ENTRY_SIZE +
2456 htab->elf.igotplt->output_offset);
2457 if (r_type == R_390_GOTPLTENT)
2458 relocation += htab->elf.igotplt->output_section->vma;
2459 }
2460 else
2461 {
2462 /* Calc. index no.
2463 Current offset - size first entry / entry size. */
2464 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2465 PLT_ENTRY_SIZE;
2466
2467 /* Offset in GOT is PLT index plus GOT headers(3)
2468 times 4, addr & GOT addr. */
2469 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2470 if (r_type == R_390_GOTPLTENT)
2471 relocation += htab->elf.sgot->output_section->vma;
2472 }
2473 unresolved_reloc = FALSE;
2474
2475 }
2476 /* Fall through. */
2477
2478 case R_390_GOT12:
2479 case R_390_GOT16:
2480 case R_390_GOT20:
2481 case R_390_GOT32:
2482 case R_390_GOTENT:
2483 /* Relocation is to the entry for this symbol in the global
2484 offset table. */
2485 if (base_got == NULL)
2486 abort ();
2487
2488 if (h != NULL)
2489 {
2490 bfd_boolean dyn;
2491
2492 off = h->got.offset;
2493 dyn = htab->elf.dynamic_sections_created;
2494
2495 if (s390_is_ifunc_symbol_p (h))
2496 {
2497 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2498 if (off == (bfd_vma)-1)
2499 {
2500 /* No explicit GOT usage so redirect to the
2501 got.iplt slot. */
2502 base_got = htab->elf.igotplt;
2503 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2504 }
2505 else
2506 {
2507 /* Explicit GOT slots must contain the address
2508 of the PLT slot. This will be handled in
2509 finish_dynamic_symbol. */
2510 }
2511 }
2512 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2513 || (info->shared
2514 && SYMBOL_REFERENCES_LOCAL (info, h))
2515 || (ELF_ST_VISIBILITY (h->other)
2516 && h->root.type == bfd_link_hash_undefweak))
2517
2518 {
2519 /* This is actually a static link, or it is a
2520 -Bsymbolic link and the symbol is defined
2521 locally, or the symbol was forced to be local
2522 because of a version file. We must initialize
2523 this entry in the global offset table. Since the
2524 offset must always be a multiple of 2, we use the
2525 least significant bit to record whether we have
2526 initialized it already.
2527
2528 When doing a dynamic link, we create a .rel.got
2529 relocation entry to initialize the value. This
2530 is done in the finish_dynamic_symbol routine. */
2531 if ((off & 1) != 0)
2532 off &= ~1;
2533 else
2534 {
2535 bfd_put_32 (output_bfd, relocation,
2536 base_got->contents + off);
2537 h->got.offset |= 1;
2538 }
2539
2540 if ((h->def_regular
2541 && info->shared
2542 && SYMBOL_REFERENCES_LOCAL (info, h))
2543 /* lrl rx,sym@GOTENT -> larl rx, sym */
2544 && ((r_type == R_390_GOTENT
2545 && (bfd_get_16 (input_bfd,
2546 contents + rel->r_offset - 2)
2547 & 0xff0f) == 0xc40d)
2548 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2549 || (r_type == R_390_GOT20
2550 && (bfd_get_32 (input_bfd,
2551 contents + rel->r_offset - 2)
2552 & 0xff00f000) == 0xe300c000
2553 && bfd_get_8 (input_bfd,
2554 contents + rel->r_offset + 3) == 0x58)))
2555 {
2556 unsigned short new_insn =
2557 (0xc000 | (bfd_get_8 (input_bfd,
2558 contents + rel->r_offset - 1) & 0xf0));
2559 bfd_put_16 (output_bfd, new_insn,
2560 contents + rel->r_offset - 2);
2561 r_type = R_390_PC32DBL;
2562 rel->r_addend = 2;
2563 howto = elf_howto_table + r_type;
2564 relocation = h->root.u.def.value
2565 + h->root.u.def.section->output_section->vma
2566 + h->root.u.def.section->output_offset;
2567 goto do_relocation;
2568 }
2569 }
2570 else
2571 unresolved_reloc = FALSE;
2572 }
2573 else
2574 {
2575 if (local_got_offsets == NULL)
2576 abort ();
2577
2578 off = local_got_offsets[r_symndx];
2579
2580 /* The offset must always be a multiple of 4. We use
2581 the least significant bit to record whether we have
2582 already generated the necessary reloc. */
2583 if ((off & 1) != 0)
2584 off &= ~1;
2585 else
2586 {
2587 bfd_put_32 (output_bfd, relocation,
2588 htab->elf.sgot->contents + off);
2589
2590 if (info->shared)
2591 {
2592 asection *srelgot;
2593 Elf_Internal_Rela outrel;
2594 bfd_byte *loc;
2595
2596 srelgot = htab->elf.srelgot;
2597 if (srelgot == NULL)
2598 abort ();
2599
2600 outrel.r_offset = (htab->elf.sgot->output_section->vma
2601 + htab->elf.sgot->output_offset
2602 + off);
2603 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2604 outrel.r_addend = relocation;
2605 loc = srelgot->contents;
2606 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2607 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2608 }
2609
2610 local_got_offsets[r_symndx] |= 1;
2611 }
2612 }
2613
2614 if (off >= (bfd_vma) -2)
2615 abort ();
2616
2617 relocation = base_got->output_offset + off;
2618
2619 /* For @GOTENT the relocation is against the offset between
2620 the instruction and the symbols entry in the GOT and not
2621 between the start of the GOT and the symbols entry. We
2622 add the vma of the GOT to get the correct value. */
2623 if ( r_type == R_390_GOTENT
2624 || r_type == R_390_GOTPLTENT)
2625 relocation += base_got->output_section->vma;
2626
2627 break;
2628
2629 case R_390_GOTOFF16:
2630 case R_390_GOTOFF32:
2631 /* Relocation is relative to the start of the global offset
2632 table. */
2633
2634 /* Note that sgot->output_offset is not involved in this
2635 calculation. We always want the start of .got. If we
2636 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2637 permitted by the ABI, we might have to change this
2638 calculation. */
2639 relocation -= htab->elf.sgot->output_section->vma;
2640 break;
2641
2642 case R_390_GOTPC:
2643 case R_390_GOTPCDBL:
2644 /* Use global offset table as symbol value. */
2645 relocation = htab->elf.sgot->output_section->vma;
2646 unresolved_reloc = FALSE;
2647 break;
2648
2649 case R_390_PLT12DBL:
2650 case R_390_PLT16DBL:
2651 case R_390_PLT24DBL:
2652 case R_390_PLT32DBL:
2653 case R_390_PLT32:
2654 /* Relocation is to the entry for this symbol in the
2655 procedure linkage table. */
2656
2657 /* Resolve a PLT32 reloc against a local symbol directly,
2658 without using the procedure linkage table. */
2659 if (h == NULL)
2660 break;
2661
2662 if (h->plt.offset == (bfd_vma) -1
2663 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2664 {
2665 /* We didn't make a PLT entry for this symbol. This
2666 happens when statically linking PIC code, or when
2667 using -Bsymbolic. */
2668 break;
2669 }
2670
2671 if (s390_is_ifunc_symbol_p (h))
2672 relocation = (htab->elf.iplt->output_section->vma
2673 + htab->elf.iplt->output_offset
2674 + h->plt.offset);
2675 else
2676 relocation = (htab->elf.splt->output_section->vma
2677 + htab->elf.splt->output_offset
2678 + h->plt.offset);
2679 unresolved_reloc = FALSE;
2680 break;
2681
2682 case R_390_PLTOFF16:
2683 case R_390_PLTOFF32:
2684 /* Relocation is to the entry for this symbol in the
2685 procedure linkage table relative to the start of the GOT. */
2686
2687 /* For local symbols or if we didn't make a PLT entry for
2688 this symbol resolve the symbol directly. */
2689 if (h == NULL
2690 || h->plt.offset == (bfd_vma) -1
2691 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2692 {
2693 relocation -= htab->elf.sgot->output_section->vma;
2694 break;
2695 }
2696
2697 if (s390_is_ifunc_symbol_p (h))
2698 relocation = (htab->elf.iplt->output_section->vma
2699 + htab->elf.iplt->output_offset
2700 + h->plt.offset
2701 - htab->elf.sgot->output_section->vma);
2702 else
2703 relocation = (htab->elf.splt->output_section->vma
2704 + htab->elf.splt->output_offset
2705 + h->plt.offset
2706 - htab->elf.sgot->output_section->vma);
2707 unresolved_reloc = FALSE;
2708 break;
2709
2710 case R_390_8:
2711 case R_390_16:
2712 case R_390_32:
2713 case R_390_PC16:
2714 case R_390_PC12DBL:
2715 case R_390_PC16DBL:
2716 case R_390_PC24DBL:
2717 case R_390_PC32DBL:
2718 case R_390_PC32:
2719 if (h != NULL
2720 && s390_is_ifunc_symbol_p (h)
2721 && h->def_regular)
2722 {
2723 if (!info->shared || !h->non_got_ref)
2724 {
2725 /* For a non-shared object STT_GNU_IFUNC symbol must
2726 go through PLT. */
2727 relocation = (htab->elf.iplt->output_section->vma
2728 + htab->elf.iplt->output_offset
2729 + h ->plt.offset);
2730 goto do_relocation;
2731 }
2732 else
2733 {
2734 /* For shared objects a runtime relocation is needed. */
2735
2736 Elf_Internal_Rela outrel;
2737 asection *sreloc;
2738
2739 /* Need a dynamic relocation to get the real function
2740 address. */
2741 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2742 info,
2743 input_section,
2744 rel->r_offset);
2745 if (outrel.r_offset == (bfd_vma) -1
2746 || outrel.r_offset == (bfd_vma) -2)
2747 abort ();
2748
2749 outrel.r_offset += (input_section->output_section->vma
2750 + input_section->output_offset);
2751
2752 if (h->dynindx == -1
2753 || h->forced_local
2754 || info->executable)
2755 {
2756 /* This symbol is resolved locally. */
2757 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2758 outrel.r_addend = (h->root.u.def.value
2759 + h->root.u.def.section->output_section->vma
2760 + h->root.u.def.section->output_offset);
2761 }
2762 else
2763 {
2764 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2765 outrel.r_addend = 0;
2766 }
2767
2768 sreloc = htab->elf.irelifunc;
2769 elf_append_rela (output_bfd, sreloc, &outrel);
2770
2771 /* If this reloc is against an external symbol, we
2772 do not want to fiddle with the addend. Otherwise,
2773 we need to include the symbol value so that it
2774 becomes an addend for the dynamic reloc. For an
2775 internal symbol, we have updated addend. */
2776 continue;
2777 }
2778 }
2779
2780 if ((input_section->flags & SEC_ALLOC) == 0)
2781 break;
2782
2783 if ((info->shared
2784 && (h == NULL
2785 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2786 || h->root.type != bfd_link_hash_undefweak)
2787 && ((r_type != R_390_PC16
2788 && r_type != R_390_PC12DBL
2789 && r_type != R_390_PC16DBL
2790 && r_type != R_390_PC24DBL
2791 && r_type != R_390_PC32DBL
2792 && r_type != R_390_PC32)
2793 || !SYMBOL_CALLS_LOCAL (info, h)))
2794 || (ELIMINATE_COPY_RELOCS
2795 && !info->shared
2796 && h != NULL
2797 && h->dynindx != -1
2798 && !h->non_got_ref
2799 && ((h->def_dynamic
2800 && !h->def_regular)
2801 || h->root.type == bfd_link_hash_undefweak
2802 || h->root.type == bfd_link_hash_undefined)))
2803 {
2804 Elf_Internal_Rela outrel;
2805 bfd_boolean skip, relocate;
2806 asection *sreloc;
2807 bfd_byte *loc;
2808
2809 /* When generating a shared object, these relocations
2810 are copied into the output file to be resolved at run
2811 time. */
2812
2813 skip = FALSE;
2814 relocate = FALSE;
2815
2816 outrel.r_offset =
2817 _bfd_elf_section_offset (output_bfd, info, input_section,
2818 rel->r_offset);
2819 if (outrel.r_offset == (bfd_vma) -1)
2820 skip = TRUE;
2821 else if (outrel.r_offset == (bfd_vma) -2)
2822 skip = TRUE, relocate = TRUE;
2823 outrel.r_offset += (input_section->output_section->vma
2824 + input_section->output_offset);
2825
2826 if (skip)
2827 memset (&outrel, 0, sizeof outrel);
2828 else if (h != NULL
2829 && h->dynindx != -1
2830 && (r_type == R_390_PC16
2831 || r_type == R_390_PC12DBL
2832 || r_type == R_390_PC16DBL
2833 || r_type == R_390_PC24DBL
2834 || r_type == R_390_PC32DBL
2835 || r_type == R_390_PC32
2836 || !info->shared
2837 || !SYMBOLIC_BIND (info, h)
2838 || !h->def_regular))
2839 {
2840 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2841 outrel.r_addend = rel->r_addend;
2842 }
2843 else
2844 {
2845 /* This symbol is local, or marked to become local. */
2846 outrel.r_addend = relocation + rel->r_addend;
2847 if (r_type == R_390_32)
2848 {
2849 relocate = TRUE;
2850 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2851 }
2852 else
2853 {
2854 long sindx;
2855
2856 if (bfd_is_abs_section (sec))
2857 sindx = 0;
2858 else if (sec == NULL || sec->owner == NULL)
2859 {
2860 bfd_set_error(bfd_error_bad_value);
2861 return FALSE;
2862 }
2863 else
2864 {
2865 asection *osec;
2866
2867 osec = sec->output_section;
2868 sindx = elf_section_data (osec)->dynindx;
2869 if (sindx == 0)
2870 {
2871 osec = htab->elf.text_index_section;
2872 sindx = elf_section_data (osec)->dynindx;
2873 }
2874 BFD_ASSERT (sindx != 0);
2875
2876 /* We are turning this relocation into one
2877 against a section symbol, so subtract out
2878 the output section's address but not the
2879 offset of the input section in the output
2880 section. */
2881 outrel.r_addend -= osec->vma;
2882 }
2883 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2884 }
2885 }
2886
2887 sreloc = elf_section_data (input_section)->sreloc;
2888 if (sreloc == NULL)
2889 abort ();
2890
2891 loc = sreloc->contents;
2892 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2893 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2894
2895 /* If this reloc is against an external symbol, we do
2896 not want to fiddle with the addend. Otherwise, we
2897 need to include the symbol value so that it becomes
2898 an addend for the dynamic reloc. */
2899 if (! relocate)
2900 continue;
2901 }
2902 break;
2903
2904 /* Relocations for tls literal pool entries. */
2905 case R_390_TLS_IE32:
2906 if (info->shared)
2907 {
2908 Elf_Internal_Rela outrel;
2909 asection *sreloc;
2910 bfd_byte *loc;
2911
2912 outrel.r_offset = rel->r_offset
2913 + input_section->output_section->vma
2914 + input_section->output_offset;
2915 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2916 sreloc = elf_section_data (input_section)->sreloc;
2917 if (sreloc == NULL)
2918 abort ();
2919 loc = sreloc->contents;
2920 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2921 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2922 }
2923 /* Fall through. */
2924
2925 case R_390_TLS_GD32:
2926 case R_390_TLS_GOTIE32:
2927 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2928 tls_type = GOT_UNKNOWN;
2929 if (h == NULL && local_got_offsets)
2930 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2931 else if (h != NULL)
2932 {
2933 tls_type = elf_s390_hash_entry(h)->tls_type;
2934 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2935 r_type = R_390_TLS_LE32;
2936 }
2937 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2938 r_type = R_390_TLS_IE32;
2939
2940 if (r_type == R_390_TLS_LE32)
2941 {
2942 /* This relocation gets optimized away by the local exec
2943 access optimization. */
2944 BFD_ASSERT (! unresolved_reloc);
2945 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2946 contents + rel->r_offset);
2947 continue;
2948 }
2949
2950 if (htab->elf.sgot == NULL)
2951 abort ();
2952
2953 if (h != NULL)
2954 off = h->got.offset;
2955 else
2956 {
2957 if (local_got_offsets == NULL)
2958 abort ();
2959
2960 off = local_got_offsets[r_symndx];
2961 }
2962
2963 emit_tls_relocs:
2964
2965 if ((off & 1) != 0)
2966 off &= ~1;
2967 else
2968 {
2969 Elf_Internal_Rela outrel;
2970 bfd_byte *loc;
2971 int dr_type, indx;
2972
2973 if (htab->elf.srelgot == NULL)
2974 abort ();
2975
2976 outrel.r_offset = (htab->elf.sgot->output_section->vma
2977 + htab->elf.sgot->output_offset + off);
2978
2979 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2980 if (r_type == R_390_TLS_GD32)
2981 dr_type = R_390_TLS_DTPMOD;
2982 else
2983 dr_type = R_390_TLS_TPOFF;
2984 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2985 outrel.r_addend = relocation - dtpoff_base (info);
2986 else
2987 outrel.r_addend = 0;
2988 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2989 loc = htab->elf.srelgot->contents;
2990 loc += htab->elf.srelgot->reloc_count++
2991 * sizeof (Elf32_External_Rela);
2992 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2993
2994 if (r_type == R_390_TLS_GD32)
2995 {
2996 if (indx == 0)
2997 {
2998 BFD_ASSERT (! unresolved_reloc);
2999 bfd_put_32 (output_bfd,
3000 relocation - dtpoff_base (info),
3001 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3002 }
3003 else
3004 {
3005 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3006 outrel.r_offset += GOT_ENTRY_SIZE;
3007 outrel.r_addend = 0;
3008 htab->elf.srelgot->reloc_count++;
3009 loc += sizeof (Elf32_External_Rela);
3010 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3011 }
3012 }
3013
3014 if (h != NULL)
3015 h->got.offset |= 1;
3016 else
3017 local_got_offsets[r_symndx] |= 1;
3018 }
3019
3020 if (off >= (bfd_vma) -2)
3021 abort ();
3022 if (r_type == ELF32_R_TYPE (rel->r_info))
3023 {
3024 relocation = htab->elf.sgot->output_offset + off;
3025 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3026 relocation += htab->elf.sgot->output_section->vma;
3027 unresolved_reloc = FALSE;
3028 }
3029 else
3030 {
3031 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3032 contents + rel->r_offset);
3033 continue;
3034 }
3035 break;
3036
3037 case R_390_TLS_GOTIE12:
3038 case R_390_TLS_GOTIE20:
3039 case R_390_TLS_IEENT:
3040 if (h == NULL)
3041 {
3042 if (local_got_offsets == NULL)
3043 abort();
3044 off = local_got_offsets[r_symndx];
3045 if (info->shared)
3046 goto emit_tls_relocs;
3047 }
3048 else
3049 {
3050 off = h->got.offset;
3051 tls_type = elf_s390_hash_entry(h)->tls_type;
3052 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3053 goto emit_tls_relocs;
3054 }
3055
3056 if (htab->elf.sgot == NULL)
3057 abort ();
3058
3059 BFD_ASSERT (! unresolved_reloc);
3060 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3061 htab->elf.sgot->contents + off);
3062 relocation = htab->elf.sgot->output_offset + off;
3063 if (r_type == R_390_TLS_IEENT)
3064 relocation += htab->elf.sgot->output_section->vma;
3065 unresolved_reloc = FALSE;
3066 break;
3067
3068 case R_390_TLS_LDM32:
3069 if (! info->shared)
3070 /* The literal pool entry this relocation refers to gets ignored
3071 by the optimized code of the local exec model. Do nothing
3072 and the value will turn out zero. */
3073 continue;
3074
3075 if (htab->elf.sgot == NULL)
3076 abort ();
3077
3078 off = htab->tls_ldm_got.offset;
3079 if (off & 1)
3080 off &= ~1;
3081 else
3082 {
3083 Elf_Internal_Rela outrel;
3084 bfd_byte *loc;
3085
3086 if (htab->elf.srelgot == NULL)
3087 abort ();
3088
3089 outrel.r_offset = (htab->elf.sgot->output_section->vma
3090 + htab->elf.sgot->output_offset + off);
3091
3092 bfd_put_32 (output_bfd, 0,
3093 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3094 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3095 outrel.r_addend = 0;
3096 loc = htab->elf.srelgot->contents;
3097 loc += htab->elf.srelgot->reloc_count++
3098 * sizeof (Elf32_External_Rela);
3099 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3100 htab->tls_ldm_got.offset |= 1;
3101 }
3102 relocation = htab->elf.sgot->output_offset + off;
3103 unresolved_reloc = FALSE;
3104 break;
3105
3106 case R_390_TLS_LE32:
3107 if (info->shared)
3108 {
3109 /* Linking a shared library with non-fpic code requires
3110 a R_390_TLS_TPOFF relocation. */
3111 Elf_Internal_Rela outrel;
3112 asection *sreloc;
3113 bfd_byte *loc;
3114 int indx;
3115
3116 outrel.r_offset = rel->r_offset
3117 + input_section->output_section->vma
3118 + input_section->output_offset;
3119 if (h != NULL && h->dynindx != -1)
3120 indx = h->dynindx;
3121 else
3122 indx = 0;
3123 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3124 if (indx == 0)
3125 outrel.r_addend = relocation - dtpoff_base (info);
3126 else
3127 outrel.r_addend = 0;
3128 sreloc = elf_section_data (input_section)->sreloc;
3129 if (sreloc == NULL)
3130 abort ();
3131 loc = sreloc->contents;
3132 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3133 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3134 }
3135 else
3136 {
3137 BFD_ASSERT (! unresolved_reloc);
3138 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3139 contents + rel->r_offset);
3140 }
3141 continue;
3142
3143 case R_390_TLS_LDO32:
3144 if (info->shared || (input_section->flags & SEC_DEBUGGING))
3145 relocation -= dtpoff_base (info);
3146 else
3147 /* When converting LDO to LE, we must negate. */
3148 relocation = -tpoff (info, relocation);
3149 break;
3150
3151 /* Relocations for tls instructions. */
3152 case R_390_TLS_LOAD:
3153 case R_390_TLS_GDCALL:
3154 case R_390_TLS_LDCALL:
3155 tls_type = GOT_UNKNOWN;
3156 if (h == NULL && local_got_offsets)
3157 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3158 else if (h != NULL)
3159 tls_type = elf_s390_hash_entry(h)->tls_type;
3160
3161 if (tls_type == GOT_TLS_GD)
3162 continue;
3163
3164 if (r_type == R_390_TLS_LOAD)
3165 {
3166 if (!info->shared && (h == NULL || h->dynindx == -1))
3167 {
3168 /* IE->LE transition. Four valid cases:
3169 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3170 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3171 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3172 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3173 unsigned int insn, ry;
3174
3175 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3176 ry = 0;
3177 if ((insn & 0xff00f000) == 0x58000000)
3178 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3179 ry = (insn & 0x000f0000);
3180 else if ((insn & 0xff0f0000) == 0x58000000)
3181 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3182 ry = (insn & 0x0000f000) << 4;
3183 else if ((insn & 0xff00f000) == 0x5800c000)
3184 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3185 ry = (insn & 0x000f0000);
3186 else if ((insn & 0xff0f0000) == 0x580c0000)
3187 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3188 ry = (insn & 0x0000f000) << 4;
3189 else
3190 invalid_tls_insn (input_bfd, input_section, rel);
3191 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3192 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3193 }
3194 }
3195 else if (r_type == R_390_TLS_GDCALL)
3196 {
3197 unsigned int insn;
3198
3199 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3200 if ((insn & 0xff000fff) != 0x4d000000 &&
3201 (insn & 0xffff0000) != 0xc0e50000 &&
3202 (insn & 0xff000000) != 0x0d000000)
3203 invalid_tls_insn (input_bfd, input_section, rel);
3204 if (!info->shared && (h == NULL || h->dynindx == -1))
3205 {
3206 if ((insn & 0xff000000) == 0x0d000000)
3207 {
3208 /* GD->LE transition.
3209 basr rx, ry -> nopr r7 */
3210 insn = 0x07070000 | (insn & 0xffff);
3211 }
3212 else if ((insn & 0xff000000) == 0x4d000000)
3213 {
3214 /* GD->LE transition.
3215 bas %r14,0(%rx,%r13) -> bc 0,0 */
3216 insn = 0x47000000;
3217 }
3218 else
3219 {
3220 /* GD->LE transition.
3221 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3222 insn = 0xc0040000;
3223 bfd_put_16 (output_bfd, 0x0000,
3224 contents + rel->r_offset + 4);
3225 }
3226 }
3227 else
3228 {
3229 /* If basr is used in the pic case to invoke
3230 _tls_get_offset, something went wrong before. */
3231 if ((insn & 0xff000000) == 0x0d000000)
3232 invalid_tls_insn (input_bfd, input_section, rel);
3233
3234 if ((insn & 0xff000000) == 0x4d000000)
3235 {
3236 /* GD->IE transition.
3237 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3238 insn = 0x5822c000;
3239 }
3240 else
3241 {
3242 /* GD->IE transition.
3243 brasl %r14,__tls_get_addr@plt ->
3244 l %r2,0(%r2,%r12) ; bcr 0,0 */
3245 insn = 0x5822c000;
3246 bfd_put_16 (output_bfd, 0x0700,
3247 contents + rel->r_offset + 4);
3248 }
3249 }
3250 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3251 }
3252 else if (r_type == R_390_TLS_LDCALL)
3253 {
3254 if (!info->shared)
3255 {
3256 unsigned int insn;
3257
3258 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3259 if ((insn & 0xff000fff) != 0x4d000000 &&
3260 (insn & 0xffff0000) != 0xc0e50000 &&
3261 (insn & 0xff000000) != 0x0d000000)
3262 invalid_tls_insn (input_bfd, input_section, rel);
3263
3264 if ((insn & 0xff000000) == 0x0d000000)
3265 {
3266 /* LD->LE transition.
3267 basr rx, ry -> nopr r7 */
3268 insn = 0x07070000 | (insn & 0xffff);
3269 }
3270 else if ((insn & 0xff000000) == 0x4d000000)
3271 {
3272 /* LD->LE transition.
3273 bas %r14,0(%rx,%r13) -> bc 0,0 */
3274 insn = 0x47000000;
3275 }
3276 else
3277 {
3278 /* LD->LE transition.
3279 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3280 insn = 0xc0040000;
3281 bfd_put_16 (output_bfd, 0x0000,
3282 contents + rel->r_offset + 4);
3283 }
3284 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3285 }
3286 }
3287 continue;
3288
3289 default:
3290 break;
3291 }
3292
3293 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3294 because such sections are not SEC_ALLOC and thus ld.so will
3295 not process them. */
3296 if (unresolved_reloc
3297 && !((input_section->flags & SEC_DEBUGGING) != 0
3298 && h->def_dynamic)
3299 && _bfd_elf_section_offset (output_bfd, info, input_section,
3300 rel->r_offset) != (bfd_vma) -1)
3301 (*_bfd_error_handler)
3302 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3303 input_bfd,
3304 input_section,
3305 (long) rel->r_offset,
3306 howto->name,
3307 h->root.root.string);
3308
3309 do_relocation:
3310
3311 /* When applying a 24 bit reloc we need to start one byte
3312 earlier. Otherwise the 32 bit get/put bfd operations might
3313 access a byte after the actual section. */
3314 if (r_type == R_390_PC24DBL
3315 || r_type == R_390_PLT24DBL)
3316 rel->r_offset--;
3317
3318 if (r_type == R_390_20
3319 || r_type == R_390_GOT20
3320 || r_type == R_390_GOTPLT20
3321 || r_type == R_390_TLS_GOTIE20)
3322 {
3323 relocation += rel->r_addend;
3324 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3325 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3326 contents, rel->r_offset,
3327 relocation, 0);
3328 }
3329 else
3330 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3331 contents, rel->r_offset,
3332 relocation, rel->r_addend);
3333
3334 if (r != bfd_reloc_ok)
3335 {
3336 const char *name;
3337
3338 if (h != NULL)
3339 name = h->root.root.string;
3340 else
3341 {
3342 name = bfd_elf_string_from_elf_section (input_bfd,
3343 symtab_hdr->sh_link,
3344 sym->st_name);
3345 if (name == NULL)
3346 return FALSE;
3347 if (*name == '\0')
3348 name = bfd_section_name (input_bfd, sec);
3349 }
3350
3351 if (r == bfd_reloc_overflow)
3352 {
3353
3354 if (! ((*info->callbacks->reloc_overflow)
3355 (info, (h ? &h->root : NULL), name, howto->name,
3356 (bfd_vma) 0, input_bfd, input_section,
3357 rel->r_offset)))
3358 return FALSE;
3359 }
3360 else
3361 {
3362 (*_bfd_error_handler)
3363 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3364 input_bfd, input_section,
3365 (long) rel->r_offset, name, (int) r);
3366 return FALSE;
3367 }
3368 }
3369 }
3370
3371 return TRUE;
3372 }
3373
3374 /* Generate the PLT slots together with the dynamic relocations needed
3375 for IFUNC symbols. */
3376
3377 static void
3378 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3379 struct bfd_link_info *info,
3380 struct elf_link_hash_entry *h,
3381 struct elf_s390_link_hash_table *htab,
3382 bfd_vma iplt_offset,
3383 bfd_vma resolver_address)
3384 {
3385 bfd_vma iplt_index;
3386 bfd_vma got_offset;
3387 bfd_vma igotiplt_offset;
3388 Elf_Internal_Rela rela;
3389 bfd_byte *loc;
3390 asection *plt, *gotplt, *relplt;
3391 bfd_vma relative_offset;
3392
3393 if (htab->elf.iplt == NULL
3394 || htab->elf.igotplt == NULL
3395 || htab->elf.irelplt == NULL)
3396 abort ();
3397
3398 gotplt = htab->elf.igotplt;
3399 relplt = htab->elf.irelplt;
3400
3401 /* Index of the PLT slot within iplt section. */
3402 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3403 plt = htab->elf.iplt;
3404 /* Offset into the igot.plt section. */
3405 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3406 /* Offset into the got section. */
3407 got_offset = igotiplt_offset + gotplt->output_offset;
3408
3409 /* S390 uses halfwords for relative branch calc! */
3410 relative_offset = - (plt->output_offset +
3411 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3412 /* If offset is > 32768, branch to a previous branch
3413 390 can only handle +-64 K jumps. */
3414 if ( -32768 > (int) relative_offset )
3415 relative_offset
3416 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3417
3418 /* Fill in the entry in the procedure linkage table. */
3419 if (!info->shared)
3420 {
3421 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3422 PLT_ENTRY_SIZE);
3423
3424 /* Adjust jump to the first plt entry. */
3425 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3426 plt->contents + iplt_offset + 20);
3427
3428 /* Push the GOT offset field. */
3429 bfd_put_32 (output_bfd,
3430 (gotplt->output_section->vma
3431 + got_offset),
3432 plt->contents + iplt_offset + 24);
3433 }
3434 else if (got_offset < 4096)
3435 {
3436 /* The GOT offset is small enough to be used directly as
3437 displacement. */
3438 memcpy (plt->contents + iplt_offset,
3439 elf_s390_plt_pic12_entry,
3440 PLT_ENTRY_SIZE);
3441
3442 /* Put in the GOT offset as displacement value. The 0xc000
3443 value comes from the first word of the plt entry. Look
3444 at the elf_s390_plt_pic16_entry content. */
3445 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3446 plt->contents + iplt_offset + 2);
3447
3448 /* Adjust the jump to the first plt entry. */
3449 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3450 plt->contents + iplt_offset + 20);
3451 }
3452 else if (got_offset < 32768)
3453 {
3454 /* The GOT offset is too big for a displacement but small
3455 enough to be a signed 16 bit immediate value as it can be
3456 used in an lhi instruction. */
3457 memcpy (plt->contents + iplt_offset,
3458 elf_s390_plt_pic16_entry,
3459 PLT_ENTRY_SIZE);
3460
3461 /* Put in the GOT offset for the lhi instruction. */
3462 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3463 plt->contents + iplt_offset + 2);
3464
3465 /* Adjust the jump to the first plt entry. */
3466 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3467 plt->contents + iplt_offset + 20);
3468 }
3469 else
3470 {
3471 memcpy (plt->contents + iplt_offset,
3472 elf_s390_plt_pic_entry,
3473 PLT_ENTRY_SIZE);
3474
3475 /* Adjust the jump to the first plt entry. */
3476 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3477 plt->contents + iplt_offset + 20);
3478
3479 /* Push the GOT offset field. */
3480 bfd_put_32 (output_bfd, got_offset,
3481 plt->contents + iplt_offset + 24);
3482 }
3483 /* Insert offset into reloc. table here. */
3484 bfd_put_32 (output_bfd, relplt->output_offset +
3485 iplt_index * RELA_ENTRY_SIZE,
3486 plt->contents + iplt_offset + 28);
3487
3488 /* Fill in the entry in the global offset table.
3489 Points to instruction after GOT offset. */
3490 bfd_put_32 (output_bfd,
3491 (plt->output_section->vma
3492 + plt->output_offset
3493 + iplt_offset
3494 + 12),
3495 gotplt->contents + igotiplt_offset);
3496
3497 /* Fill in the entry in the .rela.plt section. */
3498 rela.r_offset = gotplt->output_section->vma + got_offset;
3499
3500 if (!h
3501 || h->dynindx == -1
3502 || ((info->executable
3503 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3504 && h->def_regular))
3505 {
3506 /* The symbol can be locally resolved. */
3507 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3508 rela.r_addend = resolver_address;
3509 }
3510 else
3511 {
3512 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3513 rela.r_addend = 0;
3514 }
3515
3516 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3517 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3518 }
3519
3520 /* Finish up dynamic symbol handling. We set the contents of various
3521 dynamic sections here. */
3522
3523 static bfd_boolean
3524 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3525 struct bfd_link_info *info,
3526 struct elf_link_hash_entry *h,
3527 Elf_Internal_Sym *sym)
3528 {
3529 struct elf_s390_link_hash_table *htab;
3530 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3531
3532 htab = elf_s390_hash_table (info);
3533
3534 if (h->plt.offset != (bfd_vma) -1)
3535 {
3536 bfd_vma plt_index;
3537 bfd_vma got_offset;
3538 Elf_Internal_Rela rela;
3539 bfd_byte *loc;
3540 bfd_vma relative_offset;
3541
3542 /* This symbol has an entry in the procedure linkage table. Set
3543 it up. */
3544 if (s390_is_ifunc_symbol_p (h))
3545 {
3546 /* If we can resolve the IFUNC symbol locally we generate an
3547 IRELATIVE reloc. */
3548 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3549 eh->ifunc_resolver_address +
3550 eh->ifunc_resolver_section->output_offset +
3551 eh->ifunc_resolver_section->output_section->vma);
3552 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3553 symbols is below. */
3554 }
3555 else
3556 {
3557 if (h->dynindx == -1
3558 || htab->elf.splt == NULL
3559 || htab->elf.sgotplt == NULL
3560 || htab->elf.srelplt == NULL)
3561 abort ();
3562
3563 /* Calc. index no.
3564 Current offset - size first entry / entry size. */
3565 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3566
3567 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3568 addr & GOT addr. */
3569 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3570
3571 /* S390 uses halfwords for relative branch calc! */
3572 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3573 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3574 /* If offset is > 32768, branch to a previous branch
3575 390 can only handle +-64 K jumps. */
3576 if ( -32768 > (int) relative_offset )
3577 relative_offset
3578 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3579
3580 /* Fill in the entry in the procedure linkage table. */
3581 if (!info->shared)
3582 {
3583 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3584 PLT_ENTRY_SIZE);
3585
3586 /* Adjust jump to the first plt entry. */
3587 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3588 htab->elf.splt->contents + h->plt.offset + 20);
3589
3590 /* Push the GOT offset field. */
3591 bfd_put_32 (output_bfd,
3592 (htab->elf.sgotplt->output_section->vma
3593 + htab->elf.sgotplt->output_offset
3594 + got_offset),
3595 htab->elf.splt->contents + h->plt.offset + 24);
3596 }
3597 else if (got_offset < 4096)
3598 {
3599 /* The GOT offset is small enough to be used directly as
3600 displacement. */
3601 memcpy (htab->elf.splt->contents + h->plt.offset,
3602 elf_s390_plt_pic12_entry,
3603 PLT_ENTRY_SIZE);
3604
3605 /* Put in the GOT offset as displacement value. The 0xc000
3606 value comes from the first word of the plt entry. Look
3607 at the elf_s390_plt_pic16_entry content. */
3608 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3609 htab->elf.splt->contents + h->plt.offset + 2);
3610
3611 /* Adjust the jump to the first plt entry. */
3612 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3613 htab->elf.splt->contents + h->plt.offset + 20);
3614 }
3615 else if (got_offset < 32768)
3616 {
3617 /* The GOT offset is too big for a displacement but small
3618 enough to be a signed 16 bit immediate value as it can be
3619 used in an lhi instruction. */
3620 memcpy (htab->elf.splt->contents + h->plt.offset,
3621 elf_s390_plt_pic16_entry,
3622 PLT_ENTRY_SIZE);
3623
3624 /* Put in the GOT offset for the lhi instruction. */
3625 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3626 htab->elf.splt->contents + h->plt.offset + 2);
3627
3628 /* Adjust the jump to the first plt entry. */
3629 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3630 htab->elf.splt->contents + h->plt.offset + 20);
3631 }
3632 else
3633 {
3634 memcpy (htab->elf.splt->contents + h->plt.offset,
3635 elf_s390_plt_pic_entry,
3636 PLT_ENTRY_SIZE);
3637
3638 /* Adjust the jump to the first plt entry. */
3639 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3640 htab->elf.splt->contents + h->plt.offset + 20);
3641
3642 /* Push the GOT offset field. */
3643 bfd_put_32 (output_bfd, got_offset,
3644 htab->elf.splt->contents + h->plt.offset + 24);
3645 }
3646 /* Insert offset into reloc. table here. */
3647 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3648 htab->elf.splt->contents + h->plt.offset + 28);
3649
3650 /* Fill in the entry in the global offset table.
3651 Points to instruction after GOT offset. */
3652 bfd_put_32 (output_bfd,
3653 (htab->elf.splt->output_section->vma
3654 + htab->elf.splt->output_offset
3655 + h->plt.offset
3656 + 12),
3657 htab->elf.sgotplt->contents + got_offset);
3658
3659 /* Fill in the entry in the .rela.plt section. */
3660 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3661 + htab->elf.sgotplt->output_offset
3662 + got_offset);
3663 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3664 rela.r_addend = 0;
3665 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3666 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3667
3668 if (!h->def_regular)
3669 {
3670 /* Mark the symbol as undefined, rather than as defined in
3671 the .plt section. Leave the value alone. This is a clue
3672 for the dynamic linker, to make function pointer
3673 comparisons work between an application and shared
3674 library. */
3675 sym->st_shndx = SHN_UNDEF;
3676 }
3677 }
3678 }
3679
3680 if (h->got.offset != (bfd_vma) -1
3681 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3682 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3683 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3684 {
3685 Elf_Internal_Rela rela;
3686 bfd_byte *loc;
3687
3688 /* This symbol has an entry in the global offset table. Set it
3689 up. */
3690
3691 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3692 abort ();
3693
3694 rela.r_offset = (htab->elf.sgot->output_section->vma
3695 + htab->elf.sgot->output_offset
3696 + (h->got.offset &~ (bfd_vma) 1));
3697
3698 /* If this is a static link, or it is a -Bsymbolic link and the
3699 symbol is defined locally or was forced to be local because
3700 of a version file, we just want to emit a RELATIVE reloc.
3701 The entry in the global offset table will already have been
3702 initialized in the relocate_section function. */
3703 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3704 {
3705 if (info->shared)
3706 {
3707 /* An explicit GOT slot usage needs GLOB_DAT. If the
3708 symbol references local the implicit got.iplt slot
3709 will be used and the IRELATIVE reloc has been created
3710 above. */
3711 goto do_glob_dat;
3712 }
3713 else
3714 {
3715 /* For non-shared objects explicit GOT slots must be
3716 filled with the PLT slot address for pointer
3717 equality reasons. */
3718 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3719 + htab->elf.iplt->output_offset
3720 + h->plt.offset),
3721 htab->elf.sgot->contents + h->got.offset);
3722 return TRUE;
3723 }
3724 }
3725 else if (info->shared
3726 && SYMBOL_REFERENCES_LOCAL (info, h))
3727 {
3728 /* If this is a static link, or it is a -Bsymbolic link and
3729 the symbol is defined locally or was forced to be local
3730 because of a version file, we just want to emit a
3731 RELATIVE reloc. The entry in the global offset table
3732 will already have been initialized in the
3733 relocate_section function. */
3734 if (!h->def_regular)
3735 return FALSE;
3736 BFD_ASSERT((h->got.offset & 1) != 0);
3737 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3738 rela.r_addend = (h->root.u.def.value
3739 + h->root.u.def.section->output_section->vma
3740 + h->root.u.def.section->output_offset);
3741 }
3742 else
3743 {
3744 BFD_ASSERT((h->got.offset & 1) == 0);
3745 do_glob_dat:
3746 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3747 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3748 rela.r_addend = 0;
3749 }
3750
3751 loc = htab->elf.srelgot->contents;
3752 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3753 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3754 }
3755
3756 if (h->needs_copy)
3757 {
3758 Elf_Internal_Rela rela;
3759 bfd_byte *loc;
3760
3761 /* This symbols needs a copy reloc. Set it up. */
3762
3763 if (h->dynindx == -1
3764 || (h->root.type != bfd_link_hash_defined
3765 && h->root.type != bfd_link_hash_defweak)
3766 || htab->srelbss == NULL)
3767 abort ();
3768
3769 rela.r_offset = (h->root.u.def.value
3770 + h->root.u.def.section->output_section->vma
3771 + h->root.u.def.section->output_offset);
3772 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3773 rela.r_addend = 0;
3774 loc = htab->srelbss->contents;
3775 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3776 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3777 }
3778
3779 /* Mark some specially defined symbols as absolute. */
3780 if (h == htab->elf.hdynamic
3781 || h == htab->elf.hgot
3782 || h == htab->elf.hplt)
3783 sym->st_shndx = SHN_ABS;
3784
3785 return TRUE;
3786 }
3787
3788 /* Used to decide how to sort relocs in an optimal manner for the
3789 dynamic linker, before writing them out. */
3790
3791 static enum elf_reloc_type_class
3792 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3793 const asection *rel_sec ATTRIBUTE_UNUSED,
3794 const Elf_Internal_Rela *rela)
3795 {
3796 switch ((int) ELF32_R_TYPE (rela->r_info))
3797 {
3798 case R_390_RELATIVE:
3799 return reloc_class_relative;
3800 case R_390_JMP_SLOT:
3801 return reloc_class_plt;
3802 case R_390_COPY:
3803 return reloc_class_copy;
3804 default:
3805 return reloc_class_normal;
3806 }
3807 }
3808
3809 /* Finish up the dynamic sections. */
3810
3811 static bfd_boolean
3812 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3813 struct bfd_link_info *info)
3814 {
3815 struct elf_s390_link_hash_table *htab;
3816 bfd *dynobj;
3817 asection *sdyn;
3818 bfd *ibfd;
3819 unsigned int i;
3820
3821 htab = elf_s390_hash_table (info);
3822 dynobj = htab->elf.dynobj;
3823 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3824
3825 if (htab->elf.dynamic_sections_created)
3826 {
3827 Elf32_External_Dyn *dyncon, *dynconend;
3828
3829 if (sdyn == NULL || htab->elf.sgot == NULL)
3830 abort ();
3831
3832 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3833 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3834 for (; dyncon < dynconend; dyncon++)
3835 {
3836 Elf_Internal_Dyn dyn;
3837 asection *s;
3838
3839 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3840
3841 switch (dyn.d_tag)
3842 {
3843 default:
3844 continue;
3845
3846 case DT_PLTGOT:
3847 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3848 break;
3849
3850 case DT_JMPREL:
3851 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3852 break;
3853
3854 case DT_PLTRELSZ:
3855 s = htab->elf.srelplt->output_section;
3856 dyn.d_un.d_val = s->size;
3857 break;
3858 }
3859
3860 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3861 }
3862
3863 /* Fill in the special first entry in the procedure linkage table. */
3864 if (htab->elf.splt && htab->elf.splt->size > 0)
3865 {
3866 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3867 if (info->shared)
3868 {
3869 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3870 PLT_FIRST_ENTRY_SIZE);
3871 }
3872 else
3873 {
3874 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3875 PLT_FIRST_ENTRY_SIZE);
3876 bfd_put_32 (output_bfd,
3877 htab->elf.sgotplt->output_section->vma
3878 + htab->elf.sgotplt->output_offset,
3879 htab->elf.splt->contents + 24);
3880 }
3881 elf_section_data (htab->elf.splt->output_section)
3882 ->this_hdr.sh_entsize = 4;
3883 }
3884
3885 }
3886
3887 if (htab->elf.sgotplt)
3888 {
3889 /* Fill in the first three entries in the global offset table. */
3890 if (htab->elf.sgotplt->size > 0)
3891 {
3892 bfd_put_32 (output_bfd,
3893 (sdyn == NULL ? (bfd_vma) 0
3894 : sdyn->output_section->vma + sdyn->output_offset),
3895 htab->elf.sgotplt->contents);
3896 /* One entry for shared object struct ptr. */
3897 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3898 /* One entry for _dl_runtime_resolve. */
3899 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3900 }
3901
3902 elf_section_data (htab->elf.sgotplt->output_section)
3903 ->this_hdr.sh_entsize = 4;
3904 }
3905 /* Finish dynamic symbol for local IFUNC symbols. */
3906 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3907 {
3908 struct plt_entry *local_plt;
3909 Elf_Internal_Sym *isym;
3910 Elf_Internal_Shdr *symtab_hdr;
3911
3912 symtab_hdr = &elf_symtab_hdr (ibfd);
3913
3914 local_plt = elf_s390_local_plt (ibfd);
3915 if (local_plt != NULL)
3916 for (i = 0; i < symtab_hdr->sh_info; i++)
3917 {
3918 if (local_plt[i].plt.offset != (bfd_vma) -1)
3919 {
3920 asection *sec = local_plt[i].sec;
3921 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3922 if (isym == NULL)
3923 return FALSE;
3924
3925 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3926 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3927 local_plt[i].plt.offset,
3928 isym->st_value
3929 + sec->output_section->vma
3930 + sec->output_offset);
3931
3932 }
3933 }
3934 }
3935 return TRUE;
3936 }
3937
3938 static bfd_boolean
3939 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3940 {
3941 int offset;
3942 unsigned int size;
3943
3944 switch (note->descsz)
3945 {
3946 default:
3947 return FALSE;
3948
3949 case 224: /* S/390 Linux. */
3950 /* pr_cursig */
3951 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3952
3953 /* pr_pid */
3954 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3955
3956 /* pr_reg */
3957 offset = 72;
3958 size = 144;
3959 break;
3960 }
3961
3962 /* Make a ".reg/999" section. */
3963 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3964 size, note->descpos + offset);
3965 }
3966
3967 /* Return address for Ith PLT stub in section PLT, for relocation REL
3968 or (bfd_vma) -1 if it should not be included. */
3969
3970 static bfd_vma
3971 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3972 const arelent *rel ATTRIBUTE_UNUSED)
3973 {
3974 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3975 }
3976
3977 static bfd_boolean
3978 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3979 {
3980 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3981 return TRUE;
3982 }
3983
3984
3985 #define TARGET_BIG_SYM s390_elf32_vec
3986 #define TARGET_BIG_NAME "elf32-s390"
3987 #define ELF_ARCH bfd_arch_s390
3988 #define ELF_TARGET_ID S390_ELF_DATA
3989 #define ELF_MACHINE_CODE EM_S390
3990 #define ELF_MACHINE_ALT1 EM_S390_OLD
3991 #define ELF_MAXPAGESIZE 0x1000
3992
3993 #define elf_backend_can_gc_sections 1
3994 #define elf_backend_can_refcount 1
3995 #define elf_backend_want_got_plt 1
3996 #define elf_backend_plt_readonly 1
3997 #define elf_backend_want_plt_sym 0
3998 #define elf_backend_got_header_size 12
3999 #define elf_backend_rela_normal 1
4000
4001 #define elf_info_to_howto elf_s390_info_to_howto
4002
4003 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4004 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4005 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4006 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4007
4008 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4009
4010 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4011 #define elf_backend_check_relocs elf_s390_check_relocs
4012 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4013 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4014 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4015 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4016 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4017 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4018 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4019 #define elf_backend_relocate_section elf_s390_relocate_section
4020 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4021 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4022 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4023 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4024 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4025
4026 #define bfd_elf32_mkobject elf_s390_mkobject
4027 #define elf_backend_object_p elf_s390_object_p
4028
4029 #include "elf32-target.h"
GDB Binutils - Deliverables
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