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Delete duplicate target short-cuts to dynamic sections
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28 #include <stdarg.h>
29
30 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
31 from smaller values. Start with zero, widen, *then* decrement. */
32 #define MINUS_ONE (((bfd_vma)0) - 1)
33
34 static bfd_reloc_status_type
35 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
36 asection *, bfd *, char **);
37 static bfd_reloc_status_type
38 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
39 asection *, bfd *, char **);
40
41 /* The relocation "howto" table. */
42 static reloc_howto_type elf_howto_table[] =
43 {
44 HOWTO (R_390_NONE, /* type */
45 0, /* rightshift */
46 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
47 0, /* bitsize */
48 FALSE, /* pc_relative */
49 0, /* bitpos */
50 complain_overflow_dont, /* complain_on_overflow */
51 bfd_elf_generic_reloc, /* special_function */
52 "R_390_NONE", /* name */
53 FALSE, /* partial_inplace */
54 0, /* src_mask */
55 0, /* dst_mask */
56 FALSE), /* pcrel_offset */
57
58 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
60 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
61 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
62 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
64 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
66 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
68 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
70 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
72 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
74 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
76 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
78 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
80 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
82 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
84 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
86 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
88 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
90 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
92 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
94 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
96 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
98 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
100 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
102 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
104 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
106 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
108 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
110 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
112 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
114 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
115 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
116 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
118 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
120 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
122 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
124 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
126 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
128 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
130 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
131 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
132 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
133 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
134 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
136 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
137 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
139 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
140 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
141 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
142 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
145 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
147 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
148 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
150 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
152 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
153 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
155 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
156 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
158 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
160 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
162 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
164 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
165 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
166 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
167 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
168 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
169 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
170 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
171 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
172 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
174 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
176 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
178 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
180 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
181 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
182 };
183
184 /* GNU extension to record C++ vtable hierarchy. */
185 static reloc_howto_type elf64_s390_vtinherit_howto =
186 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
187 static reloc_howto_type elf64_s390_vtentry_howto =
188 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
189
190 static reloc_howto_type *
191 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
192 bfd_reloc_code_real_type code)
193 {
194 switch (code)
195 {
196 case BFD_RELOC_NONE:
197 return &elf_howto_table[(int) R_390_NONE];
198 case BFD_RELOC_8:
199 return &elf_howto_table[(int) R_390_8];
200 case BFD_RELOC_390_12:
201 return &elf_howto_table[(int) R_390_12];
202 case BFD_RELOC_16:
203 return &elf_howto_table[(int) R_390_16];
204 case BFD_RELOC_32:
205 return &elf_howto_table[(int) R_390_32];
206 case BFD_RELOC_CTOR:
207 return &elf_howto_table[(int) R_390_32];
208 case BFD_RELOC_32_PCREL:
209 return &elf_howto_table[(int) R_390_PC32];
210 case BFD_RELOC_390_GOT12:
211 return &elf_howto_table[(int) R_390_GOT12];
212 case BFD_RELOC_32_GOT_PCREL:
213 return &elf_howto_table[(int) R_390_GOT32];
214 case BFD_RELOC_390_PLT32:
215 return &elf_howto_table[(int) R_390_PLT32];
216 case BFD_RELOC_390_COPY:
217 return &elf_howto_table[(int) R_390_COPY];
218 case BFD_RELOC_390_GLOB_DAT:
219 return &elf_howto_table[(int) R_390_GLOB_DAT];
220 case BFD_RELOC_390_JMP_SLOT:
221 return &elf_howto_table[(int) R_390_JMP_SLOT];
222 case BFD_RELOC_390_RELATIVE:
223 return &elf_howto_table[(int) R_390_RELATIVE];
224 case BFD_RELOC_32_GOTOFF:
225 return &elf_howto_table[(int) R_390_GOTOFF32];
226 case BFD_RELOC_390_GOTPC:
227 return &elf_howto_table[(int) R_390_GOTPC];
228 case BFD_RELOC_390_GOT16:
229 return &elf_howto_table[(int) R_390_GOT16];
230 case BFD_RELOC_16_PCREL:
231 return &elf_howto_table[(int) R_390_PC16];
232 case BFD_RELOC_390_PC12DBL:
233 return &elf_howto_table[(int) R_390_PC12DBL];
234 case BFD_RELOC_390_PLT12DBL:
235 return &elf_howto_table[(int) R_390_PLT12DBL];
236 case BFD_RELOC_390_PC16DBL:
237 return &elf_howto_table[(int) R_390_PC16DBL];
238 case BFD_RELOC_390_PLT16DBL:
239 return &elf_howto_table[(int) R_390_PLT16DBL];
240 case BFD_RELOC_390_PC24DBL:
241 return &elf_howto_table[(int) R_390_PC24DBL];
242 case BFD_RELOC_390_PLT24DBL:
243 return &elf_howto_table[(int) R_390_PLT24DBL];
244 case BFD_RELOC_390_PC32DBL:
245 return &elf_howto_table[(int) R_390_PC32DBL];
246 case BFD_RELOC_390_PLT32DBL:
247 return &elf_howto_table[(int) R_390_PLT32DBL];
248 case BFD_RELOC_390_GOTPCDBL:
249 return &elf_howto_table[(int) R_390_GOTPCDBL];
250 case BFD_RELOC_64:
251 return &elf_howto_table[(int) R_390_64];
252 case BFD_RELOC_64_PCREL:
253 return &elf_howto_table[(int) R_390_PC64];
254 case BFD_RELOC_390_GOT64:
255 return &elf_howto_table[(int) R_390_GOT64];
256 case BFD_RELOC_390_PLT64:
257 return &elf_howto_table[(int) R_390_PLT64];
258 case BFD_RELOC_390_GOTENT:
259 return &elf_howto_table[(int) R_390_GOTENT];
260 case BFD_RELOC_16_GOTOFF:
261 return &elf_howto_table[(int) R_390_GOTOFF16];
262 case BFD_RELOC_390_GOTOFF64:
263 return &elf_howto_table[(int) R_390_GOTOFF64];
264 case BFD_RELOC_390_GOTPLT12:
265 return &elf_howto_table[(int) R_390_GOTPLT12];
266 case BFD_RELOC_390_GOTPLT16:
267 return &elf_howto_table[(int) R_390_GOTPLT16];
268 case BFD_RELOC_390_GOTPLT32:
269 return &elf_howto_table[(int) R_390_GOTPLT32];
270 case BFD_RELOC_390_GOTPLT64:
271 return &elf_howto_table[(int) R_390_GOTPLT64];
272 case BFD_RELOC_390_GOTPLTENT:
273 return &elf_howto_table[(int) R_390_GOTPLTENT];
274 case BFD_RELOC_390_PLTOFF16:
275 return &elf_howto_table[(int) R_390_PLTOFF16];
276 case BFD_RELOC_390_PLTOFF32:
277 return &elf_howto_table[(int) R_390_PLTOFF32];
278 case BFD_RELOC_390_PLTOFF64:
279 return &elf_howto_table[(int) R_390_PLTOFF64];
280 case BFD_RELOC_390_TLS_LOAD:
281 return &elf_howto_table[(int) R_390_TLS_LOAD];
282 case BFD_RELOC_390_TLS_GDCALL:
283 return &elf_howto_table[(int) R_390_TLS_GDCALL];
284 case BFD_RELOC_390_TLS_LDCALL:
285 return &elf_howto_table[(int) R_390_TLS_LDCALL];
286 case BFD_RELOC_390_TLS_GD64:
287 return &elf_howto_table[(int) R_390_TLS_GD64];
288 case BFD_RELOC_390_TLS_GOTIE12:
289 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
290 case BFD_RELOC_390_TLS_GOTIE64:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
292 case BFD_RELOC_390_TLS_LDM64:
293 return &elf_howto_table[(int) R_390_TLS_LDM64];
294 case BFD_RELOC_390_TLS_IE64:
295 return &elf_howto_table[(int) R_390_TLS_IE64];
296 case BFD_RELOC_390_TLS_IEENT:
297 return &elf_howto_table[(int) R_390_TLS_IEENT];
298 case BFD_RELOC_390_TLS_LE64:
299 return &elf_howto_table[(int) R_390_TLS_LE64];
300 case BFD_RELOC_390_TLS_LDO64:
301 return &elf_howto_table[(int) R_390_TLS_LDO64];
302 case BFD_RELOC_390_TLS_DTPMOD:
303 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
304 case BFD_RELOC_390_TLS_DTPOFF:
305 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
306 case BFD_RELOC_390_TLS_TPOFF:
307 return &elf_howto_table[(int) R_390_TLS_TPOFF];
308 case BFD_RELOC_390_20:
309 return &elf_howto_table[(int) R_390_20];
310 case BFD_RELOC_390_GOT20:
311 return &elf_howto_table[(int) R_390_GOT20];
312 case BFD_RELOC_390_GOTPLT20:
313 return &elf_howto_table[(int) R_390_GOTPLT20];
314 case BFD_RELOC_390_TLS_GOTIE20:
315 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
316 case BFD_RELOC_390_IRELATIVE:
317 return &elf_howto_table[(int) R_390_IRELATIVE];
318 case BFD_RELOC_VTABLE_INHERIT:
319 return &elf64_s390_vtinherit_howto;
320 case BFD_RELOC_VTABLE_ENTRY:
321 return &elf64_s390_vtentry_howto;
322 default:
323 break;
324 }
325 return 0;
326 }
327
328 static reloc_howto_type *
329 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
330 const char *r_name)
331 {
332 unsigned int i;
333
334 for (i = 0;
335 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
336 i++)
337 if (elf_howto_table[i].name != NULL
338 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
339 return &elf_howto_table[i];
340
341 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
342 return &elf64_s390_vtinherit_howto;
343 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
344 return &elf64_s390_vtentry_howto;
345
346 return NULL;
347 }
348
349 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
350 and elf64-s390.c has its own copy. */
351
352 static void
353 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
354 arelent *cache_ptr,
355 Elf_Internal_Rela *dst)
356 {
357 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
358 switch (r_type)
359 {
360 case R_390_GNU_VTINHERIT:
361 cache_ptr->howto = &elf64_s390_vtinherit_howto;
362 break;
363
364 case R_390_GNU_VTENTRY:
365 cache_ptr->howto = &elf64_s390_vtentry_howto;
366 break;
367
368 default:
369 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
370 {
371 /* xgettext:c-format */
372 _bfd_error_handler (_("%B: invalid relocation type %d"),
373 abfd, (int) r_type);
374 r_type = R_390_NONE;
375 }
376 cache_ptr->howto = &elf_howto_table[r_type];
377 }
378 }
379
380 /* A relocation function which doesn't do anything. */
381 static bfd_reloc_status_type
382 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
383 arelent *reloc_entry,
384 asymbol *symbol ATTRIBUTE_UNUSED,
385 void * data ATTRIBUTE_UNUSED,
386 asection *input_section,
387 bfd *output_bfd,
388 char **error_message ATTRIBUTE_UNUSED)
389 {
390 if (output_bfd)
391 reloc_entry->address += input_section->output_offset;
392 return bfd_reloc_ok;
393 }
394
395 /* Handle the large displacement relocs. */
396 static bfd_reloc_status_type
397 s390_elf_ldisp_reloc (bfd *abfd,
398 arelent *reloc_entry,
399 asymbol *symbol,
400 void * data,
401 asection *input_section,
402 bfd *output_bfd,
403 char **error_message ATTRIBUTE_UNUSED)
404 {
405 reloc_howto_type *howto = reloc_entry->howto;
406 bfd_vma relocation;
407 bfd_vma insn;
408
409 if (output_bfd != (bfd *) NULL
410 && (symbol->flags & BSF_SECTION_SYM) == 0
411 && (! howto->partial_inplace
412 || reloc_entry->addend == 0))
413 {
414 reloc_entry->address += input_section->output_offset;
415 return bfd_reloc_ok;
416 }
417 if (output_bfd != NULL)
418 return bfd_reloc_continue;
419
420 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
421 return bfd_reloc_outofrange;
422
423 relocation = (symbol->value
424 + symbol->section->output_section->vma
425 + symbol->section->output_offset);
426 relocation += reloc_entry->addend;
427 if (howto->pc_relative)
428 {
429 relocation -= (input_section->output_section->vma
430 + input_section->output_offset);
431 relocation -= reloc_entry->address;
432 }
433
434 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
435 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
436 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
437
438 if ((bfd_signed_vma) relocation < - 0x80000
439 || (bfd_signed_vma) relocation > 0x7ffff)
440 return bfd_reloc_overflow;
441 else
442 return bfd_reloc_ok;
443 }
444
445 static bfd_boolean
446 elf_s390_is_local_label_name (bfd *abfd, const char *name)
447 {
448 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
449 return TRUE;
450
451 return _bfd_elf_is_local_label_name (abfd, name);
452 }
453
454 /* Functions for the 390 ELF linker. */
455
456 /* The name of the dynamic interpreter. This is put in the .interp
457 section. */
458
459 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
460
461 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
462 copying dynamic variables from a shared lib into an app's dynbss
463 section, and instead use a dynamic relocation to point into the
464 shared lib. */
465 #define ELIMINATE_COPY_RELOCS 1
466
467 /* The size in bytes of the first entry in the procedure linkage table. */
468 #define PLT_FIRST_ENTRY_SIZE 32
469 /* The size in bytes of an entry in the procedure linkage table. */
470 #define PLT_ENTRY_SIZE 32
471
472 #define GOT_ENTRY_SIZE 8
473
474 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
475
476 /* The first three entries in a procedure linkage table are reserved,
477 and the initial contents are unimportant (we zero them out).
478 Subsequent entries look like this. See the SVR4 ABI 386
479 supplement to see how this works. */
480
481 /* For the s390, simple addr offset can only be 0 - 4096.
482 To use the full 16777216 TB address space, several instructions
483 are needed to load an address in a register and execute
484 a branch( or just saving the address)
485
486 Furthermore, only r 0 and 1 are free to use!!! */
487
488 /* The first 3 words in the GOT are then reserved.
489 Word 0 is the address of the dynamic table.
490 Word 1 is a pointer to a structure describing the object
491 Word 2 is used to point to the loader entry address.
492
493 The code for PLT entries looks like this:
494
495 The GOT holds the address in the PLT to be executed.
496 The loader then gets:
497 48(15) = Pointer to the structure describing the object.
498 56(15) = Offset in symbol table
499 The loader must then find the module where the function is
500 and insert the address in the GOT.
501
502 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
503 LG 1,0(1) # 6 bytes Load address from GOT in r1
504 BCR 15,1 # 2 bytes Jump to address
505 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
506 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
507 BRCL 15,-x # 6 bytes Jump to start of PLT
508 .long ? # 4 bytes offset into .rela.plt
509
510 Total = 32 bytes per PLT entry
511 Fixup at offset 2: relative address to GOT entry
512 Fixup at offset 22: relative branch to PLT0
513 Fixup at offset 28: 32 bit offset into .rela.plt
514
515 A 32 bit offset into the symbol table is enough. It allows for
516 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
517 object (the main program, any shared library) is limited to 4GB in
518 size. Having a .rela.plt of 2GB would already make the .plt
519 section bigger than 8GB. */
520
521 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
522 {
523 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
524 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
525 0x07, 0xf1, /* br %r1 */
526 0x0d, 0x10, /* basr %r1,%r0 */
527 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
528 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
529 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
530 };
531
532 /* The first PLT entry pushes the offset into the symbol table
533 from R1 onto the stack at 56(15) and the loader object info
534 at 48(15), loads the loader address in R1 and jumps to it. */
535
536 /* The first entry in the PLT:
537
538 PLT0:
539 STG 1,56(15) # r1 contains the offset into the symbol table
540 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
541 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
542 LG 1,16(1) # get entry address of loader
543 BCR 15,1 # jump to loader
544
545 Fixup at offset 8: relative address to start of GOT. */
546
547 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
548 {
549 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
550 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
551 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
552 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
553 0x07, 0xf1, /* br %r1 */
554 0x07, 0x00, /* nopr %r0 */
555 0x07, 0x00, /* nopr %r0 */
556 0x07, 0x00 /* nopr %r0 */
557 };
558
559
560 /* s390 ELF linker hash entry. */
561
562 struct elf_s390_link_hash_entry
563 {
564 struct elf_link_hash_entry elf;
565
566 /* Track dynamic relocs copied for this symbol. */
567 struct elf_dyn_relocs *dyn_relocs;
568
569 /* Number of GOTPLT references for a function. */
570 bfd_signed_vma gotplt_refcount;
571
572 #define GOT_UNKNOWN 0
573 #define GOT_NORMAL 1
574 #define GOT_TLS_GD 2
575 #define GOT_TLS_IE 3
576 #define GOT_TLS_IE_NLT 3
577 unsigned char tls_type;
578
579 /* For pointer equality reasons we might need to change the symbol
580 type from STT_GNU_IFUNC to STT_FUNC together with its value and
581 section entry. So after alloc_dynrelocs only these values should
582 be used. In order to check whether a symbol is IFUNC use
583 s390_is_ifunc_symbol_p. */
584 bfd_vma ifunc_resolver_address;
585 asection *ifunc_resolver_section;
586 };
587
588 #define elf_s390_hash_entry(ent) \
589 ((struct elf_s390_link_hash_entry *)(ent))
590
591 /* This structure represents an entry in the local PLT list needed for
592 local IFUNC symbols. */
593 struct plt_entry
594 {
595 /* The section of the local symbol.
596 Set in relocate_section and used in finish_dynamic_sections. */
597 asection *sec;
598
599 union
600 {
601 bfd_signed_vma refcount;
602 bfd_vma offset;
603 } plt;
604 };
605
606 /* NOTE: Keep this structure in sync with
607 the one declared in elf32-s390.c. */
608 struct elf_s390_obj_tdata
609 {
610 struct elf_obj_tdata root;
611
612 /* A local PLT is needed for ifunc symbols. */
613 struct plt_entry *local_plt;
614
615 /* TLS type for each local got entry. */
616 char *local_got_tls_type;
617 };
618
619 #define elf_s390_tdata(abfd) \
620 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
621
622 #define elf_s390_local_plt(abfd) \
623 (elf_s390_tdata (abfd)->local_plt)
624
625 #define elf_s390_local_got_tls_type(abfd) \
626 (elf_s390_tdata (abfd)->local_got_tls_type)
627
628 #define is_s390_elf(bfd) \
629 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
630 && elf_tdata (bfd) != NULL \
631 && elf_object_id (bfd) == S390_ELF_DATA)
632
633 static bfd_boolean
634 elf_s390_mkobject (bfd *abfd)
635 {
636 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
637 S390_ELF_DATA);
638 }
639
640 static bfd_boolean
641 elf_s390_object_p (bfd *abfd)
642 {
643 /* Set the right machine number for an s390 elf32 file. */
644 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
645 }
646
647 /* s390 ELF linker hash table. */
648
649 struct elf_s390_link_hash_table
650 {
651 struct elf_link_hash_table elf;
652
653 /* Short-cuts to get to dynamic linker sections. */
654 asection *sdynbss;
655 asection *srelbss;
656 asection *irelifunc;
657
658 union {
659 bfd_signed_vma refcount;
660 bfd_vma offset;
661 } tls_ldm_got;
662
663 /* Small local sym cache. */
664 struct sym_cache sym_cache;
665 };
666
667 /* Get the s390 ELF linker hash table from a link_info structure. */
668
669 #define elf_s390_hash_table(p) \
670 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
671 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
672
673 #define ELF64 1
674 #include "elf-s390-common.c"
675
676 /* Create an entry in an s390 ELF linker hash table. */
677
678 static struct bfd_hash_entry *
679 link_hash_newfunc (struct bfd_hash_entry *entry,
680 struct bfd_hash_table *table,
681 const char *string)
682 {
683 /* Allocate the structure if it has not already been allocated by a
684 subclass. */
685 if (entry == NULL)
686 {
687 entry = bfd_hash_allocate (table,
688 sizeof (struct elf_s390_link_hash_entry));
689 if (entry == NULL)
690 return entry;
691 }
692
693 /* Call the allocation method of the superclass. */
694 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
695 if (entry != NULL)
696 {
697 struct elf_s390_link_hash_entry *eh;
698
699 eh = (struct elf_s390_link_hash_entry *) entry;
700 eh->dyn_relocs = NULL;
701 eh->gotplt_refcount = 0;
702 eh->tls_type = GOT_UNKNOWN;
703 eh->ifunc_resolver_address = 0;
704 eh->ifunc_resolver_section = NULL;
705 }
706
707 return entry;
708 }
709
710 /* Create an s390 ELF linker hash table. */
711
712 static struct bfd_link_hash_table *
713 elf_s390_link_hash_table_create (bfd *abfd)
714 {
715 struct elf_s390_link_hash_table *ret;
716 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
717
718 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
719 if (ret == NULL)
720 return NULL;
721
722 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
723 sizeof (struct elf_s390_link_hash_entry),
724 S390_ELF_DATA))
725 {
726 free (ret);
727 return NULL;
728 }
729
730 return &ret->elf.root;
731 }
732
733 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
734 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
735 hash table. */
736
737 static bfd_boolean
738 elf_s390_create_dynamic_sections (bfd *dynobj,
739 struct bfd_link_info *info)
740 {
741 struct elf_s390_link_hash_table *htab;
742
743 htab = elf_s390_hash_table (info);
744 if (htab == NULL)
745 return FALSE;
746
747 if (!htab->elf.sgot && !_bfd_elf_create_got_section (dynobj, info))
748 return FALSE;
749
750 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
751 return FALSE;
752
753 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
754 if (!bfd_link_pic (info))
755 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
756
757 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
758 || (!bfd_link_pic (info) && !htab->srelbss))
759 abort ();
760
761 return TRUE;
762 }
763
764 /* Copy the extra info we tack onto an elf_link_hash_entry. */
765
766 static void
767 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
768 struct elf_link_hash_entry *dir,
769 struct elf_link_hash_entry *ind)
770 {
771 struct elf_s390_link_hash_entry *edir, *eind;
772
773 edir = (struct elf_s390_link_hash_entry *) dir;
774 eind = (struct elf_s390_link_hash_entry *) ind;
775
776 if (eind->dyn_relocs != NULL)
777 {
778 if (edir->dyn_relocs != NULL)
779 {
780 struct elf_dyn_relocs **pp;
781 struct elf_dyn_relocs *p;
782
783 /* Add reloc counts against the indirect sym to the direct sym
784 list. Merge any entries against the same section. */
785 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
786 {
787 struct elf_dyn_relocs *q;
788
789 for (q = edir->dyn_relocs; q != NULL; q = q->next)
790 if (q->sec == p->sec)
791 {
792 q->pc_count += p->pc_count;
793 q->count += p->count;
794 *pp = p->next;
795 break;
796 }
797 if (q == NULL)
798 pp = &p->next;
799 }
800 *pp = edir->dyn_relocs;
801 }
802
803 edir->dyn_relocs = eind->dyn_relocs;
804 eind->dyn_relocs = NULL;
805 }
806
807 if (ind->root.type == bfd_link_hash_indirect
808 && dir->got.refcount <= 0)
809 {
810 edir->tls_type = eind->tls_type;
811 eind->tls_type = GOT_UNKNOWN;
812 }
813
814 if (ELIMINATE_COPY_RELOCS
815 && ind->root.type != bfd_link_hash_indirect
816 && dir->dynamic_adjusted)
817 {
818 /* If called to transfer flags for a weakdef during processing
819 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
820 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
821 dir->ref_dynamic |= ind->ref_dynamic;
822 dir->ref_regular |= ind->ref_regular;
823 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
824 dir->needs_plt |= ind->needs_plt;
825 }
826 else
827 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
828 }
829
830 static int
831 elf_s390_tls_transition (struct bfd_link_info *info,
832 int r_type,
833 int is_local)
834 {
835 if (bfd_link_pic (info))
836 return r_type;
837
838 switch (r_type)
839 {
840 case R_390_TLS_GD64:
841 case R_390_TLS_IE64:
842 if (is_local)
843 return R_390_TLS_LE64;
844 return R_390_TLS_IE64;
845 case R_390_TLS_GOTIE64:
846 if (is_local)
847 return R_390_TLS_LE64;
848 return R_390_TLS_GOTIE64;
849 case R_390_TLS_LDM64:
850 return R_390_TLS_LE64;
851 }
852
853 return r_type;
854 }
855
856 /* Look through the relocs for a section during the first phase, and
857 allocate space in the global offset table or procedure linkage
858 table. */
859
860 static bfd_boolean
861 elf_s390_check_relocs (bfd *abfd,
862 struct bfd_link_info *info,
863 asection *sec,
864 const Elf_Internal_Rela *relocs)
865 {
866 struct elf_s390_link_hash_table *htab;
867 Elf_Internal_Shdr *symtab_hdr;
868 struct elf_link_hash_entry **sym_hashes;
869 const Elf_Internal_Rela *rel;
870 const Elf_Internal_Rela *rel_end;
871 asection *sreloc;
872 bfd_signed_vma *local_got_refcounts;
873 int tls_type, old_tls_type;
874
875 if (bfd_link_relocatable (info))
876 return TRUE;
877
878 BFD_ASSERT (is_s390_elf (abfd));
879
880 htab = elf_s390_hash_table (info);
881 if (htab == NULL)
882 return FALSE;
883
884 symtab_hdr = &elf_symtab_hdr (abfd);
885 sym_hashes = elf_sym_hashes (abfd);
886 local_got_refcounts = elf_local_got_refcounts (abfd);
887
888 sreloc = NULL;
889
890 rel_end = relocs + sec->reloc_count;
891 for (rel = relocs; rel < rel_end; rel++)
892 {
893 unsigned int r_type;
894 unsigned long r_symndx;
895 struct elf_link_hash_entry *h;
896 Elf_Internal_Sym *isym;
897
898 r_symndx = ELF64_R_SYM (rel->r_info);
899
900 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
901 {
902 /* xgettext:c-format */
903 _bfd_error_handler (_("%B: bad symbol index: %d"),
904 abfd, r_symndx);
905 return FALSE;
906 }
907
908 if (r_symndx < symtab_hdr->sh_info)
909 {
910 /* A local symbol. */
911 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
912 abfd, r_symndx);
913 if (isym == NULL)
914 return FALSE;
915
916 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
917 {
918 struct plt_entry *plt;
919
920 if (htab->elf.dynobj == NULL)
921 htab->elf.dynobj = abfd;
922
923 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
924 return FALSE;
925
926 if (local_got_refcounts == NULL)
927 {
928 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
929 return FALSE;
930 local_got_refcounts = elf_local_got_refcounts (abfd);
931 }
932 plt = elf_s390_local_plt (abfd);
933 plt[r_symndx].plt.refcount++;
934 }
935 h = NULL;
936 }
937 else
938 {
939 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
940 while (h->root.type == bfd_link_hash_indirect
941 || h->root.type == bfd_link_hash_warning)
942 h = (struct elf_link_hash_entry *) h->root.u.i.link;
943
944 /* PR15323, ref flags aren't set for references in the same
945 object. */
946 h->root.non_ir_ref = 1;
947 }
948
949 /* Create got section and local_got_refcounts array if they
950 are needed. */
951 r_type = elf_s390_tls_transition (info,
952 ELF64_R_TYPE (rel->r_info),
953 h == NULL);
954 switch (r_type)
955 {
956 case R_390_GOT12:
957 case R_390_GOT16:
958 case R_390_GOT20:
959 case R_390_GOT32:
960 case R_390_GOT64:
961 case R_390_GOTENT:
962 case R_390_GOTPLT12:
963 case R_390_GOTPLT16:
964 case R_390_GOTPLT20:
965 case R_390_GOTPLT32:
966 case R_390_GOTPLT64:
967 case R_390_GOTPLTENT:
968 case R_390_TLS_GD64:
969 case R_390_TLS_GOTIE12:
970 case R_390_TLS_GOTIE20:
971 case R_390_TLS_GOTIE64:
972 case R_390_TLS_IEENT:
973 case R_390_TLS_IE64:
974 case R_390_TLS_LDM64:
975 if (h == NULL
976 && local_got_refcounts == NULL)
977 {
978 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
979 return FALSE;
980 local_got_refcounts = elf_local_got_refcounts (abfd);
981 }
982
983 /* Fall through. */
984 case R_390_GOTOFF16:
985 case R_390_GOTOFF32:
986 case R_390_GOTOFF64:
987 case R_390_GOTPC:
988 case R_390_GOTPCDBL:
989 if (htab->elf.sgot == NULL)
990 {
991 if (htab->elf.dynobj == NULL)
992 htab->elf.dynobj = abfd;
993 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
994 return FALSE;
995 }
996 }
997
998 if (h != NULL)
999 {
1000 if (htab->elf.dynobj == NULL)
1001 htab->elf.dynobj = abfd;
1002 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1003 return FALSE;
1004
1005 /* Make sure an IFUNC symbol defined in a non-shared object
1006 always gets a PLT slot. */
1007 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1008 {
1009 /* The symbol is called by the dynamic loader in order
1010 to resolve the relocation. So it is in fact also
1011 referenced. */
1012 h->ref_regular = 1;
1013 h->needs_plt = 1;
1014 }
1015 }
1016
1017 switch (r_type)
1018 {
1019 case R_390_GOTPC:
1020 case R_390_GOTPCDBL:
1021 /* These relocs do not need a GOT slot. They just load the
1022 GOT pointer itself or address something else relative to
1023 the GOT. Since the GOT pointer has been set up above we
1024 are done. */
1025 break;
1026 case R_390_GOTOFF16:
1027 case R_390_GOTOFF32:
1028 case R_390_GOTOFF64:
1029 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1030 break;
1031 /* Fall through. */
1032
1033 case R_390_PLT12DBL:
1034 case R_390_PLT16DBL:
1035 case R_390_PLT24DBL:
1036 case R_390_PLT32:
1037 case R_390_PLT32DBL:
1038 case R_390_PLT64:
1039 case R_390_PLTOFF16:
1040 case R_390_PLTOFF32:
1041 case R_390_PLTOFF64:
1042 /* This symbol requires a procedure linkage table entry. We
1043 actually build the entry in adjust_dynamic_symbol,
1044 because this might be a case of linking PIC code which is
1045 never referenced by a dynamic object, in which case we
1046 don't need to generate a procedure linkage table entry
1047 after all. */
1048
1049 /* If this is a local symbol, we resolve it directly without
1050 creating a procedure linkage table entry. */
1051 if (h != NULL)
1052 {
1053 h->needs_plt = 1;
1054 h->plt.refcount += 1;
1055 }
1056 break;
1057
1058 case R_390_GOTPLT12:
1059 case R_390_GOTPLT16:
1060 case R_390_GOTPLT20:
1061 case R_390_GOTPLT32:
1062 case R_390_GOTPLT64:
1063 case R_390_GOTPLTENT:
1064 /* This symbol requires either a procedure linkage table entry
1065 or an entry in the local got. We actually build the entry
1066 in adjust_dynamic_symbol because whether this is really a
1067 global reference can change and with it the fact if we have
1068 to create a plt entry or a local got entry. To be able to
1069 make a once global symbol a local one we have to keep track
1070 of the number of gotplt references that exist for this
1071 symbol. */
1072 if (h != NULL)
1073 {
1074 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1075 h->needs_plt = 1;
1076 h->plt.refcount += 1;
1077 }
1078 else
1079 local_got_refcounts[r_symndx] += 1;
1080 break;
1081
1082 case R_390_TLS_LDM64:
1083 htab->tls_ldm_got.refcount += 1;
1084 break;
1085
1086 case R_390_TLS_IE64:
1087 case R_390_TLS_GOTIE12:
1088 case R_390_TLS_GOTIE20:
1089 case R_390_TLS_GOTIE64:
1090 case R_390_TLS_IEENT:
1091 if (bfd_link_pic (info))
1092 info->flags |= DF_STATIC_TLS;
1093 /* Fall through */
1094
1095 case R_390_GOT12:
1096 case R_390_GOT16:
1097 case R_390_GOT20:
1098 case R_390_GOT32:
1099 case R_390_GOT64:
1100 case R_390_GOTENT:
1101 case R_390_TLS_GD64:
1102 /* This symbol requires a global offset table entry. */
1103 switch (r_type)
1104 {
1105 default:
1106 case R_390_GOT12:
1107 case R_390_GOT16:
1108 case R_390_GOT20:
1109 case R_390_GOT32:
1110 case R_390_GOTENT:
1111 tls_type = GOT_NORMAL;
1112 break;
1113 case R_390_TLS_GD64:
1114 tls_type = GOT_TLS_GD;
1115 break;
1116 case R_390_TLS_IE64:
1117 case R_390_TLS_GOTIE64:
1118 tls_type = GOT_TLS_IE;
1119 break;
1120 case R_390_TLS_GOTIE12:
1121 case R_390_TLS_GOTIE20:
1122 case R_390_TLS_IEENT:
1123 tls_type = GOT_TLS_IE_NLT;
1124 break;
1125 }
1126
1127 if (h != NULL)
1128 {
1129 h->got.refcount += 1;
1130 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1131 }
1132 else
1133 {
1134 local_got_refcounts[r_symndx] += 1;
1135 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1136 }
1137 /* If a TLS symbol is accessed using IE at least once,
1138 there is no point to use dynamic model for it. */
1139 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1140 {
1141 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1142 {
1143 _bfd_error_handler
1144 /* xgettext:c-format */
1145 (_("%B: `%s' accessed both as normal and thread local symbol"),
1146 abfd, h->root.root.string);
1147 return FALSE;
1148 }
1149 if (old_tls_type > tls_type)
1150 tls_type = old_tls_type;
1151 }
1152
1153 if (old_tls_type != tls_type)
1154 {
1155 if (h != NULL)
1156 elf_s390_hash_entry (h)->tls_type = tls_type;
1157 else
1158 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1159 }
1160
1161 if (r_type != R_390_TLS_IE64)
1162 break;
1163 /* Fall through */
1164
1165 case R_390_TLS_LE64:
1166 /* For static linking and executables this reloc will be
1167 calculated at linktime otherwise a TLS_TPOFF runtime
1168 reloc will be generated. */
1169 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1170 break;
1171
1172 if (!bfd_link_pic (info))
1173 break;
1174 info->flags |= DF_STATIC_TLS;
1175 /* Fall through */
1176
1177 case R_390_8:
1178 case R_390_16:
1179 case R_390_32:
1180 case R_390_64:
1181 case R_390_PC12DBL:
1182 case R_390_PC16:
1183 case R_390_PC16DBL:
1184 case R_390_PC24DBL:
1185 case R_390_PC32:
1186 case R_390_PC32DBL:
1187 case R_390_PC64:
1188 if (h != NULL && bfd_link_executable (info))
1189 {
1190 /* If this reloc is in a read-only section, we might
1191 need a copy reloc. We can't check reliably at this
1192 stage whether the section is read-only, as input
1193 sections have not yet been mapped to output sections.
1194 Tentatively set the flag for now, and correct in
1195 adjust_dynamic_symbol. */
1196 h->non_got_ref = 1;
1197
1198 if (!bfd_link_pic (info))
1199 {
1200 /* We may need a .plt entry if the function this reloc
1201 refers to is in a shared lib. */
1202 h->plt.refcount += 1;
1203 }
1204 }
1205
1206 /* If we are creating a shared library, and this is a reloc
1207 against a global symbol, or a non PC relative reloc
1208 against a local symbol, then we need to copy the reloc
1209 into the shared library. However, if we are linking with
1210 -Bsymbolic, we do not need to copy a reloc against a
1211 global symbol which is defined in an object we are
1212 including in the link (i.e., DEF_REGULAR is set). At
1213 this point we have not seen all the input files, so it is
1214 possible that DEF_REGULAR is not set now but will be set
1215 later (it is never cleared). In case of a weak definition,
1216 DEF_REGULAR may be cleared later by a strong definition in
1217 a shared library. We account for that possibility below by
1218 storing information in the relocs_copied field of the hash
1219 table entry. A similar situation occurs when creating
1220 shared libraries and symbol visibility changes render the
1221 symbol local.
1222
1223 If on the other hand, we are creating an executable, we
1224 may need to keep relocations for symbols satisfied by a
1225 dynamic library if we manage to avoid copy relocs for the
1226 symbol. */
1227 if ((bfd_link_pic (info)
1228 && (sec->flags & SEC_ALLOC) != 0
1229 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1230 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1231 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1232 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1233 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1234 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1235 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1236 || (h != NULL
1237 && (! SYMBOLIC_BIND (info, h)
1238 || h->root.type == bfd_link_hash_defweak
1239 || !h->def_regular))))
1240 || (ELIMINATE_COPY_RELOCS
1241 && !bfd_link_pic (info)
1242 && (sec->flags & SEC_ALLOC) != 0
1243 && h != NULL
1244 && (h->root.type == bfd_link_hash_defweak
1245 || !h->def_regular)))
1246 {
1247 struct elf_dyn_relocs *p;
1248 struct elf_dyn_relocs **head;
1249
1250 /* We must copy these reloc types into the output file.
1251 Create a reloc section in dynobj and make room for
1252 this reloc. */
1253 if (sreloc == NULL)
1254 {
1255 if (htab->elf.dynobj == NULL)
1256 htab->elf.dynobj = abfd;
1257
1258 sreloc = _bfd_elf_make_dynamic_reloc_section
1259 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1260
1261 if (sreloc == NULL)
1262 return FALSE;
1263 }
1264
1265 /* If this is a global symbol, we count the number of
1266 relocations we need for this symbol. */
1267 if (h != NULL)
1268 {
1269 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1270 }
1271 else
1272 {
1273 /* Track dynamic relocs needed for local syms too.
1274 We really need local syms available to do this
1275 easily. Oh well. */
1276 asection *s;
1277 void *vpp;
1278
1279 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1280 abfd, r_symndx);
1281 if (isym == NULL)
1282 return FALSE;
1283
1284 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1285 if (s == NULL)
1286 s = sec;
1287
1288 vpp = &elf_section_data (s)->local_dynrel;
1289 head = (struct elf_dyn_relocs **) vpp;
1290 }
1291
1292 p = *head;
1293 if (p == NULL || p->sec != sec)
1294 {
1295 bfd_size_type amt = sizeof *p;
1296 p = ((struct elf_dyn_relocs *)
1297 bfd_alloc (htab->elf.dynobj, amt));
1298 if (p == NULL)
1299 return FALSE;
1300 p->next = *head;
1301 *head = p;
1302 p->sec = sec;
1303 p->count = 0;
1304 p->pc_count = 0;
1305 }
1306
1307 p->count += 1;
1308 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1309 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1310 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1311 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1312 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1313 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1314 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1315 p->pc_count += 1;
1316 }
1317 break;
1318
1319 /* This relocation describes the C++ object vtable hierarchy.
1320 Reconstruct it for later use during GC. */
1321 case R_390_GNU_VTINHERIT:
1322 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1323 return FALSE;
1324 break;
1325
1326 /* This relocation describes which C++ vtable entries are actually
1327 used. Record for later use during GC. */
1328 case R_390_GNU_VTENTRY:
1329 BFD_ASSERT (h != NULL);
1330 if (h != NULL
1331 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1332 return FALSE;
1333 break;
1334
1335 default:
1336 break;
1337 }
1338 }
1339
1340 return TRUE;
1341 }
1342
1343 /* Return the section that should be marked against GC for a given
1344 relocation. */
1345
1346 static asection *
1347 elf_s390_gc_mark_hook (asection *sec,
1348 struct bfd_link_info *info,
1349 Elf_Internal_Rela *rel,
1350 struct elf_link_hash_entry *h,
1351 Elf_Internal_Sym *sym)
1352 {
1353 if (h != NULL)
1354 switch (ELF64_R_TYPE (rel->r_info))
1355 {
1356 case R_390_GNU_VTINHERIT:
1357 case R_390_GNU_VTENTRY:
1358 return NULL;
1359 }
1360
1361 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1362 }
1363
1364 /* Update the got entry reference counts for the section being removed. */
1365
1366 static bfd_boolean
1367 elf_s390_gc_sweep_hook (bfd *abfd,
1368 struct bfd_link_info *info,
1369 asection *sec,
1370 const Elf_Internal_Rela *relocs)
1371 {
1372 struct elf_s390_link_hash_table *htab;
1373 Elf_Internal_Shdr *symtab_hdr;
1374 struct elf_link_hash_entry **sym_hashes;
1375 bfd_signed_vma *local_got_refcounts;
1376 const Elf_Internal_Rela *rel, *relend;
1377
1378 if (bfd_link_relocatable (info))
1379 return TRUE;
1380
1381 htab = elf_s390_hash_table (info);
1382 if (htab == NULL)
1383 return FALSE;
1384
1385 elf_section_data (sec)->local_dynrel = NULL;
1386
1387 symtab_hdr = &elf_symtab_hdr (abfd);
1388 sym_hashes = elf_sym_hashes (abfd);
1389 local_got_refcounts = elf_local_got_refcounts (abfd);
1390
1391 relend = relocs + sec->reloc_count;
1392 for (rel = relocs; rel < relend; rel++)
1393 {
1394 unsigned long r_symndx;
1395 unsigned int r_type;
1396 struct elf_link_hash_entry *h = NULL;
1397
1398 r_symndx = ELF64_R_SYM (rel->r_info);
1399 if (r_symndx >= symtab_hdr->sh_info)
1400 {
1401 struct elf_s390_link_hash_entry *eh;
1402 struct elf_dyn_relocs **pp;
1403 struct elf_dyn_relocs *p;
1404
1405 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1406 while (h->root.type == bfd_link_hash_indirect
1407 || h->root.type == bfd_link_hash_warning)
1408 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1409 eh = (struct elf_s390_link_hash_entry *) h;
1410
1411 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1412 if (p->sec == sec)
1413 {
1414 /* Everything must go for SEC. */
1415 *pp = p->next;
1416 break;
1417 }
1418 }
1419 else
1420 {
1421 Elf_Internal_Sym *isym;
1422
1423 /* A local symbol. */
1424 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1425 abfd, r_symndx);
1426 if (isym == NULL)
1427 return FALSE;
1428
1429 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1430 {
1431 struct plt_entry *plt = elf_s390_local_plt (abfd);
1432 if (plt[r_symndx].plt.refcount > 0)
1433 plt[r_symndx].plt.refcount--;
1434 }
1435 }
1436
1437 r_type = ELF64_R_TYPE (rel->r_info);
1438 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1439 switch (r_type)
1440 {
1441 case R_390_TLS_LDM64:
1442 if (htab->tls_ldm_got.refcount > 0)
1443 htab->tls_ldm_got.refcount -= 1;
1444 break;
1445 case R_390_GOTOFF16:
1446 case R_390_GOTOFF32:
1447 case R_390_GOTOFF64:
1448 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1449 {
1450 h->plt.refcount--;
1451 break;
1452 }
1453
1454 case R_390_GOTPC:
1455 case R_390_GOTPCDBL:
1456 break;
1457
1458 case R_390_TLS_GD64:
1459 case R_390_TLS_IE64:
1460 case R_390_TLS_GOTIE12:
1461 case R_390_TLS_GOTIE20:
1462 case R_390_TLS_GOTIE64:
1463 case R_390_TLS_IEENT:
1464 case R_390_GOT12:
1465 case R_390_GOT16:
1466 case R_390_GOT20:
1467 case R_390_GOT32:
1468 case R_390_GOT64:
1469 case R_390_GOTENT:
1470 if (h != NULL)
1471 {
1472 if (h->got.refcount > 0)
1473 h->got.refcount -= 1;
1474 }
1475 else if (local_got_refcounts != NULL)
1476 {
1477 if (local_got_refcounts[r_symndx] > 0)
1478 local_got_refcounts[r_symndx] -= 1;
1479 }
1480 break;
1481
1482 case R_390_8:
1483 case R_390_12:
1484 case R_390_16:
1485 case R_390_20:
1486 case R_390_32:
1487 case R_390_64:
1488 case R_390_PC16:
1489 case R_390_PC12DBL:
1490 case R_390_PC16DBL:
1491 case R_390_PC24DBL:
1492 case R_390_PC32:
1493 case R_390_PC32DBL:
1494 case R_390_PC64:
1495 if (bfd_link_pic (info))
1496 break;
1497 /* Fall through */
1498
1499 case R_390_PLT12DBL:
1500 case R_390_PLT16DBL:
1501 case R_390_PLT24DBL:
1502 case R_390_PLT32:
1503 case R_390_PLT32DBL:
1504 case R_390_PLT64:
1505 case R_390_PLTOFF16:
1506 case R_390_PLTOFF32:
1507 case R_390_PLTOFF64:
1508 if (h != NULL)
1509 {
1510 if (h->plt.refcount > 0)
1511 h->plt.refcount -= 1;
1512 }
1513 break;
1514
1515 case R_390_GOTPLT12:
1516 case R_390_GOTPLT16:
1517 case R_390_GOTPLT20:
1518 case R_390_GOTPLT32:
1519 case R_390_GOTPLT64:
1520 case R_390_GOTPLTENT:
1521 if (h != NULL)
1522 {
1523 if (h->plt.refcount > 0)
1524 {
1525 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1526 h->plt.refcount -= 1;
1527 }
1528 }
1529 else if (local_got_refcounts != NULL)
1530 {
1531 if (local_got_refcounts[r_symndx] > 0)
1532 local_got_refcounts[r_symndx] -= 1;
1533 }
1534 break;
1535
1536 default:
1537 break;
1538 }
1539 }
1540
1541 return TRUE;
1542 }
1543
1544 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1545 entry but we found we will not create any. Called when we find we will
1546 not have any PLT for this symbol, by for example
1547 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1548 or elf_s390_size_dynamic_sections if no dynamic sections will be
1549 created (we're only linking static objects). */
1550
1551 static void
1552 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1553 {
1554 if (h->elf.root.type == bfd_link_hash_warning)
1555 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1556
1557 if (h->gotplt_refcount <= 0)
1558 return;
1559
1560 /* We simply add the number of gotplt references to the number
1561 * of got references for this symbol. */
1562 h->elf.got.refcount += h->gotplt_refcount;
1563 h->gotplt_refcount = -1;
1564 }
1565
1566 /* Adjust a symbol defined by a dynamic object and referenced by a
1567 regular object. The current definition is in some section of the
1568 dynamic object, but we're not including those sections. We have to
1569 change the definition to something the rest of the link can
1570 understand. */
1571
1572 static bfd_boolean
1573 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1574 struct elf_link_hash_entry *h)
1575 {
1576 struct elf_s390_link_hash_table *htab;
1577 asection *s;
1578
1579 /* STT_GNU_IFUNC symbol must go through PLT. */
1580 if (s390_is_ifunc_symbol_p (h))
1581 {
1582 /* All local STT_GNU_IFUNC references must be treated as local
1583 calls via local PLT. */
1584 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1585 {
1586 bfd_size_type pc_count = 0, count = 0;
1587 struct elf_dyn_relocs **pp;
1588 struct elf_s390_link_hash_entry *eh;
1589 struct elf_dyn_relocs *p;
1590
1591 eh = (struct elf_s390_link_hash_entry *) h;
1592 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1593 {
1594 pc_count += p->pc_count;
1595 p->count -= p->pc_count;
1596 p->pc_count = 0;
1597 count += p->count;
1598 if (p->count == 0)
1599 *pp = p->next;
1600 else
1601 pp = &p->next;
1602 }
1603
1604 if (pc_count || count)
1605 {
1606 h->needs_plt = 1;
1607 h->non_got_ref = 1;
1608 if (h->plt.refcount <= 0)
1609 h->plt.refcount = 1;
1610 else
1611 h->plt.refcount += 1;
1612 }
1613 }
1614
1615 if (h->plt.refcount <= 0)
1616 {
1617 h->plt.offset = (bfd_vma) -1;
1618 h->needs_plt = 0;
1619 }
1620 return TRUE;
1621 }
1622
1623 /* If this is a function, put it in the procedure linkage table. We
1624 will fill in the contents of the procedure linkage table later
1625 (although we could actually do it here). */
1626 if (h->type == STT_FUNC
1627 || h->needs_plt)
1628 {
1629 if (h->plt.refcount <= 0
1630 || SYMBOL_CALLS_LOCAL (info, h)
1631 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1632 && h->root.type == bfd_link_hash_undefweak))
1633 {
1634 /* This case can occur if we saw a PLT32 reloc in an input
1635 file, but the symbol was never referred to by a dynamic
1636 object, or if all references were garbage collected. In
1637 such a case, we don't actually need to build a procedure
1638 linkage table, and we can just do a PC32 reloc instead. */
1639 h->plt.offset = (bfd_vma) -1;
1640 h->needs_plt = 0;
1641 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1642 }
1643
1644 return TRUE;
1645 }
1646 else
1647 /* It's possible that we incorrectly decided a .plt reloc was
1648 needed for an R_390_PC32 reloc to a non-function sym in
1649 check_relocs. We can't decide accurately between function and
1650 non-function syms in check-relocs; Objects loaded later in
1651 the link may change h->type. So fix it now. */
1652 h->plt.offset = (bfd_vma) -1;
1653
1654 /* If this is a weak symbol, and there is a real definition, the
1655 processor independent code will have arranged for us to see the
1656 real definition first, and we can just use the same value. */
1657 if (h->u.weakdef != NULL)
1658 {
1659 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1660 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1661 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1662 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1663 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1664 h->non_got_ref = h->u.weakdef->non_got_ref;
1665 return TRUE;
1666 }
1667
1668 /* This is a reference to a symbol defined by a dynamic object which
1669 is not a function. */
1670
1671 /* If we are creating a shared library, we must presume that the
1672 only references to the symbol are via the global offset table.
1673 For such cases we need not do anything here; the relocations will
1674 be handled correctly by relocate_section. */
1675 if (bfd_link_pic (info))
1676 return TRUE;
1677
1678 /* If there are no references to this symbol that do not use the
1679 GOT, we don't need to generate a copy reloc. */
1680 if (!h->non_got_ref)
1681 return TRUE;
1682
1683 /* If -z nocopyreloc was given, we won't generate them either. */
1684 if (info->nocopyreloc)
1685 {
1686 h->non_got_ref = 0;
1687 return TRUE;
1688 }
1689
1690 if (ELIMINATE_COPY_RELOCS)
1691 {
1692 struct elf_s390_link_hash_entry * eh;
1693 struct elf_dyn_relocs *p;
1694
1695 eh = (struct elf_s390_link_hash_entry *) h;
1696 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1697 {
1698 s = p->sec->output_section;
1699 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1700 break;
1701 }
1702
1703 /* If we didn't find any dynamic relocs in read-only sections, then
1704 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1705 if (p == NULL)
1706 {
1707 h->non_got_ref = 0;
1708 return TRUE;
1709 }
1710 }
1711
1712 /* We must allocate the symbol in our .dynbss section, which will
1713 become part of the .bss section of the executable. There will be
1714 an entry for this symbol in the .dynsym section. The dynamic
1715 object will contain position independent code, so all references
1716 from the dynamic object to this symbol will go through the global
1717 offset table. The dynamic linker will use the .dynsym entry to
1718 determine the address it must put in the global offset table, so
1719 both the dynamic object and the regular object will refer to the
1720 same memory location for the variable. */
1721
1722 htab = elf_s390_hash_table (info);
1723 if (htab == NULL)
1724 return FALSE;
1725
1726 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1727 copy the initial value out of the dynamic object and into the
1728 runtime process image. */
1729 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1730 {
1731 htab->srelbss->size += sizeof (Elf64_External_Rela);
1732 h->needs_copy = 1;
1733 }
1734
1735 s = htab->sdynbss;
1736
1737 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1738 }
1739
1740 /* Allocate space in .plt, .got and associated reloc sections for
1741 dynamic relocs. */
1742
1743 static bfd_boolean
1744 allocate_dynrelocs (struct elf_link_hash_entry *h,
1745 void * inf)
1746 {
1747 struct bfd_link_info *info;
1748 struct elf_s390_link_hash_table *htab;
1749 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1750 struct elf_dyn_relocs *p;
1751
1752 if (h->root.type == bfd_link_hash_indirect)
1753 return TRUE;
1754
1755 info = (struct bfd_link_info *) inf;
1756 htab = elf_s390_hash_table (info);
1757 if (htab == NULL)
1758 return FALSE;
1759
1760 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1761 here if it is defined and referenced in a non-shared object. */
1762 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1763 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1764 else if (htab->elf.dynamic_sections_created
1765 && h->plt.refcount > 0)
1766 {
1767 /* Make sure this symbol is output as a dynamic symbol.
1768 Undefined weak syms won't yet be marked as dynamic. */
1769 if (h->dynindx == -1
1770 && !h->forced_local)
1771 {
1772 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1773 return FALSE;
1774 }
1775
1776 if (bfd_link_pic (info)
1777 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1778 {
1779 asection *s = htab->elf.splt;
1780
1781 /* If this is the first .plt entry, make room for the special
1782 first entry. */
1783 if (s->size == 0)
1784 s->size += PLT_FIRST_ENTRY_SIZE;
1785
1786 h->plt.offset = s->size;
1787
1788 /* If this symbol is not defined in a regular file, and we are
1789 not generating a shared library, then set the symbol to this
1790 location in the .plt. This is required to make function
1791 pointers compare as equal between the normal executable and
1792 the shared library. */
1793 if (! bfd_link_pic (info)
1794 && !h->def_regular)
1795 {
1796 h->root.u.def.section = s;
1797 h->root.u.def.value = h->plt.offset;
1798 }
1799
1800 /* Make room for this entry. */
1801 s->size += PLT_ENTRY_SIZE;
1802
1803 /* We also need to make an entry in the .got.plt section, which
1804 will be placed in the .got section by the linker script. */
1805 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1806
1807 /* We also need to make an entry in the .rela.plt section. */
1808 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1809 }
1810 else
1811 {
1812 h->plt.offset = (bfd_vma) -1;
1813 h->needs_plt = 0;
1814 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1815 }
1816 }
1817 else
1818 {
1819 h->plt.offset = (bfd_vma) -1;
1820 h->needs_plt = 0;
1821 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1822 }
1823
1824 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1825 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1826 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1827 we can save the dynamic TLS relocation. */
1828 if (h->got.refcount > 0
1829 && !bfd_link_pic (info)
1830 && h->dynindx == -1
1831 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1832 {
1833 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1834 /* For the GOTIE access without a literal pool entry the offset has
1835 to be stored somewhere. The immediate value in the instruction
1836 is not bit enough so the value is stored in the got. */
1837 {
1838 h->got.offset = htab->elf.sgot->size;
1839 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1840 }
1841 else
1842 h->got.offset = (bfd_vma) -1;
1843 }
1844 else if (h->got.refcount > 0)
1845 {
1846 asection *s;
1847 bfd_boolean dyn;
1848 int tls_type = elf_s390_hash_entry(h)->tls_type;
1849
1850 /* Make sure this symbol is output as a dynamic symbol.
1851 Undefined weak syms won't yet be marked as dynamic. */
1852 if (h->dynindx == -1
1853 && !h->forced_local)
1854 {
1855 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1856 return FALSE;
1857 }
1858
1859 s = htab->elf.sgot;
1860 h->got.offset = s->size;
1861 s->size += GOT_ENTRY_SIZE;
1862 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1863 if (tls_type == GOT_TLS_GD)
1864 s->size += GOT_ENTRY_SIZE;
1865 dyn = htab->elf.dynamic_sections_created;
1866 /* R_390_TLS_IE64 needs one dynamic relocation,
1867 R_390_TLS_GD64 needs one if local symbol and two if global. */
1868 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1869 || tls_type >= GOT_TLS_IE)
1870 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1871 else if (tls_type == GOT_TLS_GD)
1872 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1873 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1874 || h->root.type != bfd_link_hash_undefweak)
1875 && (bfd_link_pic (info)
1876 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1877 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1878 }
1879 else
1880 h->got.offset = (bfd_vma) -1;
1881
1882 if (eh->dyn_relocs == NULL)
1883 return TRUE;
1884
1885 /* In the shared -Bsymbolic case, discard space allocated for
1886 dynamic pc-relative relocs against symbols which turn out to be
1887 defined in regular objects. For the normal shared case, discard
1888 space for pc-relative relocs that have become local due to symbol
1889 visibility changes. */
1890
1891 if (bfd_link_pic (info))
1892 {
1893 if (SYMBOL_CALLS_LOCAL (info, h))
1894 {
1895 struct elf_dyn_relocs **pp;
1896
1897 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1898 {
1899 p->count -= p->pc_count;
1900 p->pc_count = 0;
1901 if (p->count == 0)
1902 *pp = p->next;
1903 else
1904 pp = &p->next;
1905 }
1906 }
1907
1908 /* Also discard relocs on undefined weak syms with non-default
1909 visibility. */
1910 if (eh->dyn_relocs != NULL
1911 && h->root.type == bfd_link_hash_undefweak)
1912 {
1913 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1914 eh->dyn_relocs = NULL;
1915
1916 /* Make sure undefined weak symbols are output as a dynamic
1917 symbol in PIEs. */
1918 else if (h->dynindx == -1
1919 && !h->forced_local)
1920 {
1921 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1922 return FALSE;
1923 }
1924 }
1925 }
1926 else if (ELIMINATE_COPY_RELOCS)
1927 {
1928 /* For the non-shared case, discard space for relocs against
1929 symbols which turn out to need copy relocs or are not
1930 dynamic. */
1931
1932 if (!h->non_got_ref
1933 && ((h->def_dynamic
1934 && !h->def_regular)
1935 || (htab->elf.dynamic_sections_created
1936 && (h->root.type == bfd_link_hash_undefweak
1937 || h->root.type == bfd_link_hash_undefined))))
1938 {
1939 /* Make sure this symbol is output as a dynamic symbol.
1940 Undefined weak syms won't yet be marked as dynamic. */
1941 if (h->dynindx == -1
1942 && !h->forced_local)
1943 {
1944 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1945 return FALSE;
1946 }
1947
1948 /* If that succeeded, we know we'll be keeping all the
1949 relocs. */
1950 if (h->dynindx != -1)
1951 goto keep;
1952 }
1953
1954 eh->dyn_relocs = NULL;
1955
1956 keep: ;
1957 }
1958
1959 /* Finally, allocate space. */
1960 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1961 {
1962 asection *sreloc = elf_section_data (p->sec)->sreloc;
1963 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1964 }
1965
1966 return TRUE;
1967 }
1968
1969 /* Find any dynamic relocs that apply to read-only sections. */
1970
1971 static bfd_boolean
1972 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1973 {
1974 struct elf_s390_link_hash_entry *eh;
1975 struct elf_dyn_relocs *p;
1976
1977 eh = (struct elf_s390_link_hash_entry *) h;
1978 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1979 {
1980 asection *s = p->sec->output_section;
1981
1982 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1983 {
1984 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1985
1986 info->flags |= DF_TEXTREL;
1987
1988 /* Not an error, just cut short the traversal. */
1989 return FALSE;
1990 }
1991 }
1992 return TRUE;
1993 }
1994
1995 /* Set the sizes of the dynamic sections. */
1996
1997 static bfd_boolean
1998 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1999 struct bfd_link_info *info)
2000 {
2001 struct elf_s390_link_hash_table *htab;
2002 bfd *dynobj;
2003 asection *s;
2004 bfd_boolean relocs;
2005 bfd *ibfd;
2006
2007 htab = elf_s390_hash_table (info);
2008 if (htab == NULL)
2009 return FALSE;
2010
2011 dynobj = htab->elf.dynobj;
2012 if (dynobj == NULL)
2013 abort ();
2014
2015 if (htab->elf.dynamic_sections_created)
2016 {
2017 /* Set the contents of the .interp section to the interpreter. */
2018 if (bfd_link_executable (info) && !info->nointerp)
2019 {
2020 s = bfd_get_linker_section (dynobj, ".interp");
2021 if (s == NULL)
2022 abort ();
2023 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2024 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2025 }
2026 }
2027
2028 /* Set up .got offsets for local syms, and space for local dynamic
2029 relocs. */
2030 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2031 {
2032 bfd_signed_vma *local_got;
2033 bfd_signed_vma *end_local_got;
2034 char *local_tls_type;
2035 bfd_size_type locsymcount;
2036 Elf_Internal_Shdr *symtab_hdr;
2037 asection *srela;
2038 struct plt_entry *local_plt;
2039 unsigned int i;
2040
2041 if (! is_s390_elf (ibfd))
2042 continue;
2043
2044 for (s = ibfd->sections; s != NULL; s = s->next)
2045 {
2046 struct elf_dyn_relocs *p;
2047
2048 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2049 {
2050 if (!bfd_is_abs_section (p->sec)
2051 && bfd_is_abs_section (p->sec->output_section))
2052 {
2053 /* Input section has been discarded, either because
2054 it is a copy of a linkonce section or due to
2055 linker script /DISCARD/, so we'll be discarding
2056 the relocs too. */
2057 }
2058 else if (p->count != 0)
2059 {
2060 srela = elf_section_data (p->sec)->sreloc;
2061 srela->size += p->count * sizeof (Elf64_External_Rela);
2062 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2063 info->flags |= DF_TEXTREL;
2064 }
2065 }
2066 }
2067
2068 local_got = elf_local_got_refcounts (ibfd);
2069 if (!local_got)
2070 continue;
2071
2072 symtab_hdr = &elf_symtab_hdr (ibfd);
2073 locsymcount = symtab_hdr->sh_info;
2074 end_local_got = local_got + locsymcount;
2075 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2076 s = htab->elf.sgot;
2077 srela = htab->elf.srelgot;
2078 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2079 {
2080 if (*local_got > 0)
2081 {
2082 *local_got = s->size;
2083 s->size += GOT_ENTRY_SIZE;
2084 if (*local_tls_type == GOT_TLS_GD)
2085 s->size += GOT_ENTRY_SIZE;
2086 if (bfd_link_pic (info))
2087 srela->size += sizeof (Elf64_External_Rela);
2088 }
2089 else
2090 *local_got = (bfd_vma) -1;
2091 }
2092
2093 local_plt = elf_s390_local_plt (ibfd);
2094 for (i = 0; i < symtab_hdr->sh_info; i++)
2095 {
2096 if (local_plt[i].plt.refcount > 0)
2097 {
2098 local_plt[i].plt.offset = htab->elf.iplt->size;
2099 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2100 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2101 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2102 }
2103 else
2104 local_plt[i].plt.offset = (bfd_vma) -1;
2105 }
2106 }
2107
2108 if (htab->tls_ldm_got.refcount > 0)
2109 {
2110 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2111 relocs. */
2112 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2113 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2114 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2115 }
2116 else
2117 htab->tls_ldm_got.offset = -1;
2118
2119 /* Allocate global sym .plt and .got entries, and space for global
2120 sym dynamic relocs. */
2121 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2122
2123 /* We now have determined the sizes of the various dynamic sections.
2124 Allocate memory for them. */
2125 relocs = FALSE;
2126 for (s = dynobj->sections; s != NULL; s = s->next)
2127 {
2128 if ((s->flags & SEC_LINKER_CREATED) == 0)
2129 continue;
2130
2131 if (s == htab->elf.splt
2132 || s == htab->elf.sgot
2133 || s == htab->elf.sgotplt
2134 || s == htab->sdynbss
2135 || s == htab->elf.iplt
2136 || s == htab->elf.igotplt
2137 || s == htab->irelifunc)
2138 {
2139 /* Strip this section if we don't need it; see the
2140 comment below. */
2141 }
2142 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2143 {
2144 if (s->size != 0 && s != htab->elf.srelplt)
2145 relocs = TRUE;
2146
2147 /* We use the reloc_count field as a counter if we need
2148 to copy relocs into the output file. */
2149 s->reloc_count = 0;
2150 }
2151 else
2152 {
2153 /* It's not one of our sections, so don't allocate space. */
2154 continue;
2155 }
2156
2157 if (s->size == 0)
2158 {
2159 /* If we don't need this section, strip it from the
2160 output file. This is to handle .rela.bss and
2161 .rela.plt. We must create it in
2162 create_dynamic_sections, because it must be created
2163 before the linker maps input sections to output
2164 sections. The linker does that before
2165 adjust_dynamic_symbol is called, and it is that
2166 function which decides whether anything needs to go
2167 into these sections. */
2168
2169 s->flags |= SEC_EXCLUDE;
2170 continue;
2171 }
2172
2173 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2174 continue;
2175
2176 /* Allocate memory for the section contents. We use bfd_zalloc
2177 here in case unused entries are not reclaimed before the
2178 section's contents are written out. This should not happen,
2179 but this way if it does, we get a R_390_NONE reloc instead
2180 of garbage. */
2181 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2182 if (s->contents == NULL)
2183 return FALSE;
2184 }
2185
2186 if (htab->elf.dynamic_sections_created)
2187 {
2188 /* Add some entries to the .dynamic section. We fill in the
2189 values later, in elf_s390_finish_dynamic_sections, but we
2190 must add the entries now so that we get the correct size for
2191 the .dynamic section. The DT_DEBUG entry is filled in by the
2192 dynamic linker and used by the debugger. */
2193 #define add_dynamic_entry(TAG, VAL) \
2194 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2195
2196 if (bfd_link_executable (info))
2197 {
2198 if (!add_dynamic_entry (DT_DEBUG, 0))
2199 return FALSE;
2200 }
2201
2202 if (htab->elf.splt->size != 0)
2203 {
2204 if (!add_dynamic_entry (DT_PLTGOT, 0)
2205 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2206 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2207 || !add_dynamic_entry (DT_JMPREL, 0))
2208 return FALSE;
2209 }
2210
2211 if (relocs)
2212 {
2213 if (!add_dynamic_entry (DT_RELA, 0)
2214 || !add_dynamic_entry (DT_RELASZ, 0)
2215 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2216 return FALSE;
2217
2218 /* If any dynamic relocs apply to a read-only section,
2219 then we need a DT_TEXTREL entry. */
2220 if ((info->flags & DF_TEXTREL) == 0)
2221 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2222 info);
2223
2224 if ((info->flags & DF_TEXTREL) != 0)
2225 {
2226 if (!add_dynamic_entry (DT_TEXTREL, 0))
2227 return FALSE;
2228 }
2229 }
2230 }
2231 #undef add_dynamic_entry
2232
2233 return TRUE;
2234 }
2235
2236 /* Return the base VMA address which should be subtracted from real addresses
2237 when resolving @dtpoff relocation.
2238 This is PT_TLS segment p_vaddr. */
2239
2240 static bfd_vma
2241 dtpoff_base (struct bfd_link_info *info)
2242 {
2243 /* If tls_sec is NULL, we should have signalled an error already. */
2244 if (elf_hash_table (info)->tls_sec == NULL)
2245 return 0;
2246 return elf_hash_table (info)->tls_sec->vma;
2247 }
2248
2249 /* Return the relocation value for @tpoff relocation
2250 if STT_TLS virtual address is ADDRESS. */
2251
2252 static bfd_vma
2253 tpoff (struct bfd_link_info *info, bfd_vma address)
2254 {
2255 struct elf_link_hash_table *htab = elf_hash_table (info);
2256
2257 /* If tls_sec is NULL, we should have signalled an error already. */
2258 if (htab->tls_sec == NULL)
2259 return 0;
2260 return htab->tls_size + htab->tls_sec->vma - address;
2261 }
2262
2263 /* Complain if TLS instruction relocation is against an invalid
2264 instruction. */
2265
2266 static void
2267 invalid_tls_insn (bfd *input_bfd,
2268 asection *input_section,
2269 Elf_Internal_Rela *rel)
2270 {
2271 reloc_howto_type *howto;
2272
2273 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2274 _bfd_error_handler
2275 /* xgettext:c-format */
2276 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2277 input_bfd,
2278 input_section,
2279 (long) rel->r_offset,
2280 howto->name);
2281 bfd_set_error (bfd_error_bad_value);
2282 }
2283
2284 /* Relocate a 390 ELF section. */
2285
2286 static bfd_boolean
2287 elf_s390_relocate_section (bfd *output_bfd,
2288 struct bfd_link_info *info,
2289 bfd *input_bfd,
2290 asection *input_section,
2291 bfd_byte *contents,
2292 Elf_Internal_Rela *relocs,
2293 Elf_Internal_Sym *local_syms,
2294 asection **local_sections)
2295 {
2296 struct elf_s390_link_hash_table *htab;
2297 Elf_Internal_Shdr *symtab_hdr;
2298 struct elf_link_hash_entry **sym_hashes;
2299 bfd_vma *local_got_offsets;
2300 Elf_Internal_Rela *rel;
2301 Elf_Internal_Rela *relend;
2302
2303 BFD_ASSERT (is_s390_elf (input_bfd));
2304
2305 htab = elf_s390_hash_table (info);
2306 if (htab == NULL)
2307 return FALSE;
2308
2309 symtab_hdr = &elf_symtab_hdr (input_bfd);
2310 sym_hashes = elf_sym_hashes (input_bfd);
2311 local_got_offsets = elf_local_got_offsets (input_bfd);
2312
2313 rel = relocs;
2314 relend = relocs + input_section->reloc_count;
2315 for (; rel < relend; rel++)
2316 {
2317 unsigned int r_type;
2318 reloc_howto_type *howto;
2319 unsigned long r_symndx;
2320 struct elf_link_hash_entry *h;
2321 Elf_Internal_Sym *sym;
2322 asection *sec;
2323 bfd_vma off;
2324 bfd_vma relocation;
2325 bfd_boolean unresolved_reloc;
2326 bfd_reloc_status_type r;
2327 int tls_type;
2328 asection *base_got = htab->elf.sgot;
2329
2330 r_type = ELF64_R_TYPE (rel->r_info);
2331 if (r_type == (int) R_390_GNU_VTINHERIT
2332 || r_type == (int) R_390_GNU_VTENTRY)
2333 continue;
2334 if (r_type >= (int) R_390_max)
2335 {
2336 bfd_set_error (bfd_error_bad_value);
2337 return FALSE;
2338 }
2339
2340 howto = elf_howto_table + r_type;
2341 r_symndx = ELF64_R_SYM (rel->r_info);
2342
2343 h = NULL;
2344 sym = NULL;
2345 sec = NULL;
2346 unresolved_reloc = FALSE;
2347 if (r_symndx < symtab_hdr->sh_info)
2348 {
2349 sym = local_syms + r_symndx;
2350 sec = local_sections[r_symndx];
2351
2352 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2353 {
2354 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2355 if (local_plt == NULL)
2356 return FALSE;
2357
2358 /* Address of the PLT slot. */
2359 relocation = (htab->elf.iplt->output_section->vma
2360 + htab->elf.iplt->output_offset
2361 + local_plt[r_symndx].plt.offset);
2362
2363 switch (r_type)
2364 {
2365 case R_390_PLTOFF16:
2366 case R_390_PLTOFF32:
2367 case R_390_PLTOFF64:
2368 relocation -= htab->elf.sgot->output_section->vma;
2369 break;
2370 case R_390_GOTPLT12:
2371 case R_390_GOTPLT16:
2372 case R_390_GOTPLT20:
2373 case R_390_GOTPLT32:
2374 case R_390_GOTPLT64:
2375 case R_390_GOTPLTENT:
2376 case R_390_GOT12:
2377 case R_390_GOT16:
2378 case R_390_GOT20:
2379 case R_390_GOT32:
2380 case R_390_GOT64:
2381 case R_390_GOTENT:
2382 {
2383 /* Write the PLT slot address into the GOT slot. */
2384 bfd_put_64 (output_bfd, relocation,
2385 htab->elf.sgot->contents +
2386 local_got_offsets[r_symndx]);
2387 relocation = (local_got_offsets[r_symndx] +
2388 htab->elf.sgot->output_offset);
2389
2390 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2391 relocation += htab->elf.sgot->output_section->vma;
2392 break;
2393 }
2394 default:
2395 break;
2396 }
2397 /* The output section is needed later in
2398 finish_dynamic_section when creating the dynamic
2399 relocation. */
2400 local_plt[r_symndx].sec = sec;
2401 goto do_relocation;
2402 }
2403 else
2404 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2405 }
2406 else
2407 {
2408 bfd_boolean warned ATTRIBUTE_UNUSED;
2409 bfd_boolean ignored ATTRIBUTE_UNUSED;
2410
2411 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2412 r_symndx, symtab_hdr, sym_hashes,
2413 h, sec, relocation,
2414 unresolved_reloc, warned, ignored);
2415 }
2416
2417 if (sec != NULL && discarded_section (sec))
2418 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2419 rel, 1, relend, howto, 0, contents);
2420
2421 if (bfd_link_relocatable (info))
2422 continue;
2423
2424 switch (r_type)
2425 {
2426 case R_390_GOTPLT12:
2427 case R_390_GOTPLT16:
2428 case R_390_GOTPLT20:
2429 case R_390_GOTPLT32:
2430 case R_390_GOTPLT64:
2431 case R_390_GOTPLTENT:
2432 /* There are three cases for a GOTPLT relocation. 1) The
2433 relocation is against the jump slot entry of a plt that
2434 will get emitted to the output file. 2) The relocation
2435 is against the jump slot of a plt entry that has been
2436 removed. elf_s390_adjust_gotplt has created a GOT entry
2437 as replacement. 3) The relocation is against a local symbol.
2438 Cases 2) and 3) are the same as the GOT relocation code
2439 so we just have to test for case 1 and fall through for
2440 the other two. */
2441 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2442 {
2443 bfd_vma plt_index;
2444
2445 if (s390_is_ifunc_symbol_p (h))
2446 {
2447 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2448 relocation = (plt_index * GOT_ENTRY_SIZE +
2449 htab->elf.igotplt->output_offset);
2450 if (r_type == R_390_GOTPLTENT)
2451 relocation += htab->elf.igotplt->output_section->vma;
2452 }
2453 else
2454 {
2455 /* Calc. index no.
2456 Current offset - size first entry / entry size. */
2457 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2458 PLT_ENTRY_SIZE;
2459
2460 /* Offset in GOT is PLT index plus GOT headers(3)
2461 times 8, addr & GOT addr. */
2462 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2463 if (r_type == R_390_GOTPLTENT)
2464 relocation += htab->elf.sgot->output_section->vma;
2465 }
2466 unresolved_reloc = FALSE;
2467 break;
2468 }
2469 /* Fall through. */
2470
2471 case R_390_GOT12:
2472 case R_390_GOT16:
2473 case R_390_GOT20:
2474 case R_390_GOT32:
2475 case R_390_GOT64:
2476 case R_390_GOTENT:
2477 /* Relocation is to the entry for this symbol in the global
2478 offset table. */
2479 if (base_got == NULL)
2480 abort ();
2481
2482 if (h != NULL)
2483 {
2484 bfd_boolean dyn;
2485
2486 off = h->got.offset;
2487 dyn = htab->elf.dynamic_sections_created;
2488
2489 if (s390_is_ifunc_symbol_p (h))
2490 {
2491 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2492 if (off == (bfd_vma)-1)
2493 {
2494 /* No explicit GOT usage so redirect to the
2495 got.iplt slot. */
2496 base_got = htab->elf.igotplt;
2497 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2498 }
2499 else
2500 {
2501 /* Explicit GOT slots must contain the address
2502 of the PLT slot. This will be handled in
2503 finish_dynamic_symbol. */
2504 }
2505 }
2506 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2507 bfd_link_pic (info),
2508 h)
2509 || (bfd_link_pic (info)
2510 && SYMBOL_REFERENCES_LOCAL (info, h))
2511 || (ELF_ST_VISIBILITY (h->other)
2512 && h->root.type == bfd_link_hash_undefweak))
2513 {
2514 /* This is actually a static link, or it is a
2515 -Bsymbolic link and the symbol is defined
2516 locally, or the symbol was forced to be local
2517 because of a version file. We must initialize
2518 this entry in the global offset table. Since the
2519 offset must always be a multiple of 2, we use the
2520 least significant bit to record whether we have
2521 initialized it already.
2522
2523 When doing a dynamic link, we create a .rel.got
2524 relocation entry to initialize the value. This
2525 is done in the finish_dynamic_symbol routine. */
2526 if ((off & 1) != 0)
2527 off &= ~1;
2528 else
2529 {
2530 bfd_put_64 (output_bfd, relocation,
2531 base_got->contents + off);
2532 h->got.offset |= 1;
2533 }
2534
2535 if ((h->def_regular
2536 && bfd_link_pic (info)
2537 && SYMBOL_REFERENCES_LOCAL (info, h))
2538 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2539 && ((r_type == R_390_GOTENT
2540 && (bfd_get_16 (input_bfd,
2541 contents + rel->r_offset - 2)
2542 & 0xff0f) == 0xc408)
2543 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2544 || (r_type == R_390_GOT20
2545 && (bfd_get_32 (input_bfd,
2546 contents + rel->r_offset - 2)
2547 & 0xff00f000) == 0xe300c000
2548 && bfd_get_8 (input_bfd,
2549 contents + rel->r_offset + 3) == 0x04)))
2550
2551 {
2552 unsigned short new_insn =
2553 (0xc000 | (bfd_get_8 (input_bfd,
2554 contents + rel->r_offset - 1) & 0xf0));
2555 bfd_put_16 (output_bfd, new_insn,
2556 contents + rel->r_offset - 2);
2557 r_type = R_390_PC32DBL;
2558 rel->r_addend = 2;
2559 howto = elf_howto_table + r_type;
2560 relocation = h->root.u.def.value
2561 + h->root.u.def.section->output_section->vma
2562 + h->root.u.def.section->output_offset;
2563 goto do_relocation;
2564 }
2565 }
2566 else
2567 unresolved_reloc = FALSE;
2568 }
2569 else
2570 {
2571 if (local_got_offsets == NULL)
2572 abort ();
2573
2574 off = local_got_offsets[r_symndx];
2575
2576 /* The offset must always be a multiple of 8. We use
2577 the least significant bit to record whether we have
2578 already generated the necessary reloc. */
2579 if ((off & 1) != 0)
2580 off &= ~1;
2581 else
2582 {
2583 bfd_put_64 (output_bfd, relocation,
2584 htab->elf.sgot->contents + off);
2585
2586 if (bfd_link_pic (info))
2587 {
2588 asection *s;
2589 Elf_Internal_Rela outrel;
2590 bfd_byte *loc;
2591
2592 s = htab->elf.srelgot;
2593 if (s == NULL)
2594 abort ();
2595
2596 outrel.r_offset = (htab->elf.sgot->output_section->vma
2597 + htab->elf.sgot->output_offset
2598 + off);
2599 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2600 outrel.r_addend = relocation;
2601 loc = s->contents;
2602 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2603 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2604 }
2605
2606 local_got_offsets[r_symndx] |= 1;
2607 }
2608 }
2609
2610 if (off >= (bfd_vma) -2)
2611 abort ();
2612
2613 relocation = base_got->output_offset + off;
2614
2615 /* For @GOTENT the relocation is against the offset between
2616 the instruction and the symbols entry in the GOT and not
2617 between the start of the GOT and the symbols entry. We
2618 add the vma of the GOT to get the correct value. */
2619 if ( r_type == R_390_GOTENT
2620 || r_type == R_390_GOTPLTENT)
2621 relocation += base_got->output_section->vma;
2622
2623 break;
2624
2625 case R_390_GOTOFF16:
2626 case R_390_GOTOFF32:
2627 case R_390_GOTOFF64:
2628 /* Relocation is relative to the start of the global offset
2629 table. */
2630
2631 if (h != NULL
2632 && s390_is_ifunc_symbol_p (h)
2633 && h->def_regular
2634 && !bfd_link_executable (info))
2635 {
2636 relocation = (htab->elf.iplt->output_section->vma
2637 + htab->elf.iplt->output_offset
2638 + h->plt.offset
2639 - htab->elf.sgot->output_section->vma);
2640 goto do_relocation;
2641 }
2642
2643 /* Note that sgot->output_offset is not involved in this
2644 calculation. We always want the start of .got. If we
2645 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2646 permitted by the ABI, we might have to change this
2647 calculation. */
2648 relocation -= htab->elf.sgot->output_section->vma;
2649 break;
2650
2651 case R_390_GOTPC:
2652 case R_390_GOTPCDBL:
2653 /* Use global offset table as symbol value. */
2654 relocation = htab->elf.sgot->output_section->vma;
2655 unresolved_reloc = FALSE;
2656 break;
2657
2658 case R_390_PLT12DBL:
2659 case R_390_PLT16DBL:
2660 case R_390_PLT24DBL:
2661 case R_390_PLT32:
2662 case R_390_PLT32DBL:
2663 case R_390_PLT64:
2664 /* Relocation is to the entry for this symbol in the
2665 procedure linkage table. */
2666
2667 /* Resolve a PLT32 reloc against a local symbol directly,
2668 without using the procedure linkage table. */
2669 if (h == NULL)
2670 break;
2671
2672 if (h->plt.offset == (bfd_vma) -1
2673 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2674 {
2675 /* We didn't make a PLT entry for this symbol. This
2676 happens when statically linking PIC code, or when
2677 using -Bsymbolic. */
2678 break;
2679 }
2680 if (s390_is_ifunc_symbol_p (h))
2681 relocation = (htab->elf.iplt->output_section->vma
2682 + htab->elf.iplt->output_offset
2683 + h->plt.offset);
2684 else
2685 relocation = (htab->elf.splt->output_section->vma
2686 + htab->elf.splt->output_offset
2687 + h->plt.offset);
2688 unresolved_reloc = FALSE;
2689 break;
2690
2691 case R_390_PLTOFF16:
2692 case R_390_PLTOFF32:
2693 case R_390_PLTOFF64:
2694 /* Relocation is to the entry for this symbol in the
2695 procedure linkage table relative to the start of the GOT. */
2696
2697 /* For local symbols or if we didn't make a PLT entry for
2698 this symbol resolve the symbol directly. */
2699 if (h == NULL
2700 || h->plt.offset == (bfd_vma) -1
2701 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2702 {
2703 relocation -= htab->elf.sgot->output_section->vma;
2704 break;
2705 }
2706
2707 if (s390_is_ifunc_symbol_p (h))
2708 relocation = (htab->elf.iplt->output_section->vma
2709 + htab->elf.iplt->output_offset
2710 + h->plt.offset
2711 - htab->elf.sgot->output_section->vma);
2712 else
2713 relocation = (htab->elf.splt->output_section->vma
2714 + htab->elf.splt->output_offset
2715 + h->plt.offset
2716 - htab->elf.sgot->output_section->vma);
2717 unresolved_reloc = FALSE;
2718 break;
2719
2720 case R_390_PC16:
2721 case R_390_PC12DBL:
2722 case R_390_PC16DBL:
2723 case R_390_PC24DBL:
2724 case R_390_PC32:
2725 case R_390_PC32DBL:
2726 case R_390_PC64:
2727 /* The target of these relocs are instruction operands
2728 residing in read-only sections. We cannot emit a runtime
2729 reloc for it. */
2730 if (h != NULL
2731 && s390_is_ifunc_symbol_p (h)
2732 && h->def_regular
2733 && bfd_link_pic (info))
2734 {
2735 relocation = (htab->elf.iplt->output_section->vma
2736 + htab->elf.iplt->output_offset
2737 + h->plt.offset);
2738 goto do_relocation;
2739 }
2740 /* Fall through. */
2741
2742 case R_390_8:
2743 case R_390_16:
2744 case R_390_32:
2745 case R_390_64:
2746
2747 if (h != NULL
2748 && s390_is_ifunc_symbol_p (h)
2749 && h->def_regular)
2750 {
2751 if (!bfd_link_pic (info) || !h->non_got_ref)
2752 {
2753 /* For a non-shared object STT_GNU_IFUNC symbol must
2754 go through PLT. */
2755 relocation = (htab->elf.iplt->output_section->vma
2756 + htab->elf.iplt->output_offset
2757 + h ->plt.offset);
2758 goto do_relocation;
2759 }
2760 else
2761 {
2762 /* For shared objects a runtime relocation is needed. */
2763
2764 Elf_Internal_Rela outrel;
2765 asection *sreloc;
2766
2767 /* Need a dynamic relocation to get the real function
2768 address. */
2769 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2770 info,
2771 input_section,
2772 rel->r_offset);
2773 if (outrel.r_offset == (bfd_vma) -1
2774 || outrel.r_offset == (bfd_vma) -2)
2775 abort ();
2776
2777 outrel.r_offset += (input_section->output_section->vma
2778 + input_section->output_offset);
2779
2780 if (h->dynindx == -1
2781 || h->forced_local
2782 || bfd_link_executable (info))
2783 {
2784 /* This symbol is resolved locally. */
2785 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2786 outrel.r_addend = (h->root.u.def.value
2787 + h->root.u.def.section->output_section->vma
2788 + h->root.u.def.section->output_offset);
2789 }
2790 else
2791 {
2792 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2793 outrel.r_addend = 0;
2794 }
2795
2796 sreloc = htab->elf.irelifunc;
2797 elf_append_rela (output_bfd, sreloc, &outrel);
2798
2799 /* If this reloc is against an external symbol, we
2800 do not want to fiddle with the addend. Otherwise,
2801 we need to include the symbol value so that it
2802 becomes an addend for the dynamic reloc. For an
2803 internal symbol, we have updated addend. */
2804 continue;
2805 }
2806 }
2807
2808 if ((input_section->flags & SEC_ALLOC) == 0)
2809 break;
2810
2811 if ((bfd_link_pic (info)
2812 && (h == NULL
2813 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2814 || h->root.type != bfd_link_hash_undefweak)
2815 && ((r_type != R_390_PC16
2816 && r_type != R_390_PC12DBL
2817 && r_type != R_390_PC16DBL
2818 && r_type != R_390_PC24DBL
2819 && r_type != R_390_PC32
2820 && r_type != R_390_PC32DBL
2821 && r_type != R_390_PC64)
2822 || !SYMBOL_CALLS_LOCAL (info, h)))
2823 || (ELIMINATE_COPY_RELOCS
2824 && !bfd_link_pic (info)
2825 && h != NULL
2826 && h->dynindx != -1
2827 && !h->non_got_ref
2828 && ((h->def_dynamic
2829 && !h->def_regular)
2830 || h->root.type == bfd_link_hash_undefweak
2831 || h->root.type == bfd_link_hash_undefined)))
2832 {
2833 Elf_Internal_Rela outrel;
2834 bfd_boolean skip, relocate;
2835 asection *sreloc;
2836 bfd_byte *loc;
2837
2838 /* When generating a shared object, these relocations
2839 are copied into the output file to be resolved at run
2840 time. */
2841 skip = FALSE;
2842 relocate = FALSE;
2843
2844 outrel.r_offset =
2845 _bfd_elf_section_offset (output_bfd, info, input_section,
2846 rel->r_offset);
2847 if (outrel.r_offset == (bfd_vma) -1)
2848 skip = TRUE;
2849 else if (outrel.r_offset == (bfd_vma) -2)
2850 skip = TRUE, relocate = TRUE;
2851
2852 outrel.r_offset += (input_section->output_section->vma
2853 + input_section->output_offset);
2854
2855 if (skip)
2856 memset (&outrel, 0, sizeof outrel);
2857 else if (h != NULL
2858 && h->dynindx != -1
2859 && (r_type == R_390_PC16
2860 || r_type == R_390_PC12DBL
2861 || r_type == R_390_PC16DBL
2862 || r_type == R_390_PC24DBL
2863 || r_type == R_390_PC32
2864 || r_type == R_390_PC32DBL
2865 || r_type == R_390_PC64
2866 || !bfd_link_pic (info)
2867 || !SYMBOLIC_BIND (info, h)
2868 || !h->def_regular))
2869 {
2870 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2871 outrel.r_addend = rel->r_addend;
2872 }
2873 else
2874 {
2875 /* This symbol is local, or marked to become local. */
2876 outrel.r_addend = relocation + rel->r_addend;
2877 if (r_type == R_390_64)
2878 {
2879 relocate = TRUE;
2880 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2881 }
2882 else
2883 {
2884 long sindx;
2885
2886 if (bfd_is_abs_section (sec))
2887 sindx = 0;
2888 else if (sec == NULL || sec->owner == NULL)
2889 {
2890 bfd_set_error(bfd_error_bad_value);
2891 return FALSE;
2892 }
2893 else
2894 {
2895 asection *osec;
2896
2897 osec = sec->output_section;
2898 sindx = elf_section_data (osec)->dynindx;
2899
2900 if (sindx == 0)
2901 {
2902 osec = htab->elf.text_index_section;
2903 sindx = elf_section_data (osec)->dynindx;
2904 }
2905 BFD_ASSERT (sindx != 0);
2906
2907 /* We are turning this relocation into one
2908 against a section symbol, so subtract out
2909 the output section's address but not the
2910 offset of the input section in the output
2911 section. */
2912 outrel.r_addend -= osec->vma;
2913 }
2914 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2915 }
2916 }
2917
2918 sreloc = elf_section_data (input_section)->sreloc;
2919 if (sreloc == NULL)
2920 abort ();
2921
2922 loc = sreloc->contents;
2923 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2924 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2925
2926 /* If this reloc is against an external symbol, we do
2927 not want to fiddle with the addend. Otherwise, we
2928 need to include the symbol value so that it becomes
2929 an addend for the dynamic reloc. */
2930 if (! relocate)
2931 continue;
2932 }
2933
2934 break;
2935
2936 /* Relocations for tls literal pool entries. */
2937 case R_390_TLS_IE64:
2938 if (bfd_link_pic (info))
2939 {
2940 Elf_Internal_Rela outrel;
2941 asection *sreloc;
2942 bfd_byte *loc;
2943
2944 outrel.r_offset = rel->r_offset
2945 + input_section->output_section->vma
2946 + input_section->output_offset;
2947 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2948 sreloc = elf_section_data (input_section)->sreloc;
2949 if (sreloc == NULL)
2950 abort ();
2951 loc = sreloc->contents;
2952 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2953 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2954 }
2955 /* Fall through. */
2956
2957 case R_390_TLS_GD64:
2958 case R_390_TLS_GOTIE64:
2959 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2960 tls_type = GOT_UNKNOWN;
2961 if (h == NULL && local_got_offsets)
2962 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2963 else if (h != NULL)
2964 {
2965 tls_type = elf_s390_hash_entry(h)->tls_type;
2966 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2967 r_type = R_390_TLS_LE64;
2968 }
2969 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2970 r_type = R_390_TLS_IE64;
2971
2972 if (r_type == R_390_TLS_LE64)
2973 {
2974 /* This relocation gets optimized away by the local exec
2975 access optimization. */
2976 BFD_ASSERT (! unresolved_reloc);
2977 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2978 contents + rel->r_offset);
2979 continue;
2980 }
2981
2982 if (htab->elf.sgot == NULL)
2983 abort ();
2984
2985 if (h != NULL)
2986 off = h->got.offset;
2987 else
2988 {
2989 if (local_got_offsets == NULL)
2990 abort ();
2991
2992 off = local_got_offsets[r_symndx];
2993 }
2994
2995 emit_tls_relocs:
2996
2997 if ((off & 1) != 0)
2998 off &= ~1;
2999 else
3000 {
3001 Elf_Internal_Rela outrel;
3002 bfd_byte *loc;
3003 int dr_type, indx;
3004
3005 if (htab->elf.srelgot == NULL)
3006 abort ();
3007
3008 outrel.r_offset = (htab->elf.sgot->output_section->vma
3009 + htab->elf.sgot->output_offset + off);
3010
3011 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3012 if (r_type == R_390_TLS_GD64)
3013 dr_type = R_390_TLS_DTPMOD;
3014 else
3015 dr_type = R_390_TLS_TPOFF;
3016 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3017 outrel.r_addend = relocation - dtpoff_base (info);
3018 else
3019 outrel.r_addend = 0;
3020 outrel.r_info = ELF64_R_INFO (indx, dr_type);
3021 loc = htab->elf.srelgot->contents;
3022 loc += htab->elf.srelgot->reloc_count++
3023 * sizeof (Elf64_External_Rela);
3024 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3025
3026 if (r_type == R_390_TLS_GD64)
3027 {
3028 if (indx == 0)
3029 {
3030 BFD_ASSERT (! unresolved_reloc);
3031 bfd_put_64 (output_bfd,
3032 relocation - dtpoff_base (info),
3033 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3034 }
3035 else
3036 {
3037 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
3038 outrel.r_offset += GOT_ENTRY_SIZE;
3039 outrel.r_addend = 0;
3040 htab->elf.srelgot->reloc_count++;
3041 loc += sizeof (Elf64_External_Rela);
3042 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3043 }
3044 }
3045
3046 if (h != NULL)
3047 h->got.offset |= 1;
3048 else
3049 local_got_offsets[r_symndx] |= 1;
3050 }
3051
3052 if (off >= (bfd_vma) -2)
3053 abort ();
3054 if (r_type == ELF64_R_TYPE (rel->r_info))
3055 {
3056 relocation = htab->elf.sgot->output_offset + off;
3057 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3058 relocation += htab->elf.sgot->output_section->vma;
3059 unresolved_reloc = FALSE;
3060 }
3061 else
3062 {
3063 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3064 contents + rel->r_offset);
3065 continue;
3066 }
3067 break;
3068
3069 case R_390_TLS_GOTIE12:
3070 case R_390_TLS_GOTIE20:
3071 case R_390_TLS_IEENT:
3072 if (h == NULL)
3073 {
3074 if (local_got_offsets == NULL)
3075 abort();
3076 off = local_got_offsets[r_symndx];
3077 if (bfd_link_pic (info))
3078 goto emit_tls_relocs;
3079 }
3080 else
3081 {
3082 off = h->got.offset;
3083 tls_type = elf_s390_hash_entry(h)->tls_type;
3084 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3085 goto emit_tls_relocs;
3086 }
3087
3088 if (htab->elf.sgot == NULL)
3089 abort ();
3090
3091 BFD_ASSERT (! unresolved_reloc);
3092 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3093 htab->elf.sgot->contents + off);
3094 relocation = htab->elf.sgot->output_offset + off;
3095 if (r_type == R_390_TLS_IEENT)
3096 relocation += htab->elf.sgot->output_section->vma;
3097 unresolved_reloc = FALSE;
3098 break;
3099
3100 case R_390_TLS_LDM64:
3101 if (! bfd_link_pic (info))
3102 /* The literal pool entry this relocation refers to gets ignored
3103 by the optimized code of the local exec model. Do nothing
3104 and the value will turn out zero. */
3105 continue;
3106
3107 if (htab->elf.sgot == NULL)
3108 abort ();
3109
3110 off = htab->tls_ldm_got.offset;
3111 if (off & 1)
3112 off &= ~1;
3113 else
3114 {
3115 Elf_Internal_Rela outrel;
3116 bfd_byte *loc;
3117
3118 if (htab->elf.srelgot == NULL)
3119 abort ();
3120
3121 outrel.r_offset = (htab->elf.sgot->output_section->vma
3122 + htab->elf.sgot->output_offset + off);
3123
3124 bfd_put_64 (output_bfd, 0,
3125 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3126 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3127 outrel.r_addend = 0;
3128 loc = htab->elf.srelgot->contents;
3129 loc += htab->elf.srelgot->reloc_count++
3130 * sizeof (Elf64_External_Rela);
3131 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3132 htab->tls_ldm_got.offset |= 1;
3133 }
3134 relocation = htab->elf.sgot->output_offset + off;
3135 unresolved_reloc = FALSE;
3136 break;
3137
3138 case R_390_TLS_LE64:
3139 if (bfd_link_dll (info))
3140 {
3141 /* Linking a shared library with non-fpic code requires
3142 a R_390_TLS_TPOFF relocation. */
3143 Elf_Internal_Rela outrel;
3144 asection *sreloc;
3145 bfd_byte *loc;
3146 int indx;
3147
3148 outrel.r_offset = rel->r_offset
3149 + input_section->output_section->vma
3150 + input_section->output_offset;
3151 if (h != NULL && h->dynindx != -1)
3152 indx = h->dynindx;
3153 else
3154 indx = 0;
3155 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3156 if (indx == 0)
3157 outrel.r_addend = relocation - dtpoff_base (info);
3158 else
3159 outrel.r_addend = 0;
3160 sreloc = elf_section_data (input_section)->sreloc;
3161 if (sreloc == NULL)
3162 abort ();
3163 loc = sreloc->contents;
3164 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3165 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3166 }
3167 else
3168 {
3169 BFD_ASSERT (! unresolved_reloc);
3170 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3171 contents + rel->r_offset);
3172 }
3173 continue;
3174
3175 case R_390_TLS_LDO64:
3176 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3177 relocation -= dtpoff_base (info);
3178 else
3179 /* When converting LDO to LE, we must negate. */
3180 relocation = -tpoff (info, relocation);
3181 break;
3182
3183 /* Relocations for tls instructions. */
3184 case R_390_TLS_LOAD:
3185 case R_390_TLS_GDCALL:
3186 case R_390_TLS_LDCALL:
3187 tls_type = GOT_UNKNOWN;
3188 if (h == NULL && local_got_offsets)
3189 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3190 else if (h != NULL)
3191 tls_type = elf_s390_hash_entry(h)->tls_type;
3192
3193 if (tls_type == GOT_TLS_GD)
3194 continue;
3195
3196 if (r_type == R_390_TLS_LOAD)
3197 {
3198 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3199 {
3200 /* IE->LE transition. Four valid cases:
3201 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3202 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3203 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3204 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3205 unsigned int insn0, insn1, ry;
3206
3207 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3208 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3209 if (insn1 != 0x0004)
3210 invalid_tls_insn (input_bfd, input_section, rel);
3211 ry = 0;
3212 if ((insn0 & 0xff00f000) == 0xe3000000)
3213 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3214 ry = (insn0 & 0x000f0000);
3215 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3216 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3217 ry = (insn0 & 0x0000f000) << 4;
3218 else if ((insn0 & 0xff00f000) == 0xe300c000)
3219 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3220 ry = (insn0 & 0x000f0000);
3221 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3222 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3223 ry = (insn0 & 0x0000f000) << 4;
3224 else
3225 invalid_tls_insn (input_bfd, input_section, rel);
3226 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3227 insn1 = 0x000d;
3228 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3229 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3230 }
3231 }
3232 else if (r_type == R_390_TLS_GDCALL)
3233 {
3234 unsigned int insn0, insn1;
3235
3236 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3237 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3238 if ((insn0 & 0xffff0000) != 0xc0e50000)
3239 invalid_tls_insn (input_bfd, input_section, rel);
3240 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3241 {
3242 /* GD->LE transition.
3243 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3244 insn0 = 0xc0040000;
3245 insn1 = 0x0000;
3246 }
3247 else
3248 {
3249 /* GD->IE transition.
3250 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3251 insn0 = 0xe322c000;
3252 insn1 = 0x0004;
3253 }
3254 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3255 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3256 }
3257 else if (r_type == R_390_TLS_LDCALL)
3258 {
3259 if (!bfd_link_pic (info))
3260 {
3261 unsigned int insn0, insn1;
3262
3263 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3264 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3265 if ((insn0 & 0xffff0000) != 0xc0e50000)
3266 invalid_tls_insn (input_bfd, input_section, rel);
3267 /* LD->LE transition.
3268 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3269 insn0 = 0xc0040000;
3270 insn1 = 0x0000;
3271 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3272 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3273 }
3274 }
3275 continue;
3276
3277 default:
3278 break;
3279 }
3280
3281 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3282 because such sections are not SEC_ALLOC and thus ld.so will
3283 not process them. */
3284 if (unresolved_reloc
3285 && !((input_section->flags & SEC_DEBUGGING) != 0
3286 && h->def_dynamic)
3287 && _bfd_elf_section_offset (output_bfd, info, input_section,
3288 rel->r_offset) != (bfd_vma) -1)
3289 _bfd_error_handler
3290 /* xgettext:c-format */
3291 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3292 input_bfd,
3293 input_section,
3294 (long) rel->r_offset,
3295 howto->name,
3296 h->root.root.string);
3297
3298 do_relocation:
3299
3300 /* When applying a 24 bit reloc we need to start one byte
3301 earlier. Otherwise the 32 bit get/put bfd operations might
3302 access a byte after the actual section. */
3303 if (r_type == R_390_PC24DBL
3304 || r_type == R_390_PLT24DBL)
3305 rel->r_offset--;
3306
3307 if (r_type == R_390_20
3308 || r_type == R_390_GOT20
3309 || r_type == R_390_GOTPLT20
3310 || r_type == R_390_TLS_GOTIE20)
3311 {
3312 relocation += rel->r_addend;
3313 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3314 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3315 contents, rel->r_offset,
3316 relocation, 0);
3317 }
3318 else
3319 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3320 contents, rel->r_offset,
3321 relocation, rel->r_addend);
3322
3323 if (r != bfd_reloc_ok)
3324 {
3325 const char *name;
3326
3327 if (h != NULL)
3328 name = h->root.root.string;
3329 else
3330 {
3331 name = bfd_elf_string_from_elf_section (input_bfd,
3332 symtab_hdr->sh_link,
3333 sym->st_name);
3334 if (name == NULL)
3335 return FALSE;
3336 if (*name == '\0')
3337 name = bfd_section_name (input_bfd, sec);
3338 }
3339
3340 if (r == bfd_reloc_overflow)
3341 (*info->callbacks->reloc_overflow)
3342 (info, (h ? &h->root : NULL), name, howto->name,
3343 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3344 else
3345 {
3346 _bfd_error_handler
3347 /* xgettext:c-format */
3348 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3349 input_bfd, input_section,
3350 (long) rel->r_offset, name, (int) r);
3351 return FALSE;
3352 }
3353 }
3354 }
3355
3356 return TRUE;
3357 }
3358
3359 /* Generate the PLT slots together with the dynamic relocations needed
3360 for IFUNC symbols. */
3361
3362 static void
3363 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3364 struct bfd_link_info *info,
3365 struct elf_link_hash_entry *h,
3366 struct elf_s390_link_hash_table *htab,
3367 bfd_vma plt_offset,
3368 bfd_vma resolver_address)
3369 {
3370 bfd_vma plt_index;
3371 bfd_vma got_offset;
3372 Elf_Internal_Rela rela;
3373 bfd_byte *loc;
3374 asection *plt, *gotplt, *relplt;
3375
3376 if (htab->elf.iplt == NULL
3377 || htab->elf.igotplt == NULL
3378 || htab->elf.irelplt == NULL)
3379 abort ();
3380
3381 /* Index of the PLT slot within iplt section. */
3382 plt_index = plt_offset / PLT_ENTRY_SIZE;
3383 plt = htab->elf.iplt;
3384 /* Offset into the igot.plt section. */
3385 got_offset = plt_index * GOT_ENTRY_SIZE;
3386 gotplt = htab->elf.igotplt;
3387 relplt = htab->elf.irelplt;
3388
3389 /* Fill in the blueprint of a PLT. */
3390 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3391 PLT_ENTRY_SIZE);
3392
3393 /* Fixup the relative address to the GOT entry */
3394 bfd_put_32 (output_bfd,
3395 (gotplt->output_section->vma +
3396 gotplt->output_offset + got_offset
3397 - (plt->output_section->vma +
3398 plt->output_offset +
3399 plt_offset))/2,
3400 plt->contents + plt_offset + 2);
3401 /* Fixup the relative branch to PLT 0 */
3402 bfd_put_32 (output_bfd, - (plt->output_offset +
3403 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3404 plt->contents + plt_offset + 24);
3405 /* Fixup offset into .rela.plt section. */
3406 bfd_put_32 (output_bfd, relplt->output_offset +
3407 plt_index * sizeof (Elf64_External_Rela),
3408 plt->contents + plt_offset + 28);
3409
3410 /* Fill in the entry in the global offset table.
3411 Points to instruction after GOT offset. */
3412 bfd_put_64 (output_bfd,
3413 (plt->output_section->vma
3414 + plt->output_offset
3415 + plt_offset
3416 + 14),
3417 gotplt->contents + got_offset);
3418
3419 /* Fill in the entry in the .rela.plt section. */
3420 rela.r_offset = (gotplt->output_section->vma
3421 + gotplt->output_offset
3422 + got_offset);
3423
3424 if (!h
3425 || h->dynindx == -1
3426 || ((bfd_link_executable (info)
3427 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3428 && h->def_regular))
3429 {
3430 /* The symbol can be locally resolved. */
3431 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3432 rela.r_addend = resolver_address;
3433 }
3434 else
3435 {
3436 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3437 rela.r_addend = 0;
3438 }
3439
3440 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3441 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3442 }
3443
3444
3445 /* Finish up dynamic symbol handling. We set the contents of various
3446 dynamic sections here. */
3447
3448 static bfd_boolean
3449 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3450 struct bfd_link_info *info,
3451 struct elf_link_hash_entry *h,
3452 Elf_Internal_Sym *sym)
3453 {
3454 struct elf_s390_link_hash_table *htab;
3455 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3456
3457 htab = elf_s390_hash_table (info);
3458 if (htab == NULL)
3459 return FALSE;
3460
3461 if (h->plt.offset != (bfd_vma) -1)
3462 {
3463 bfd_vma plt_index;
3464 bfd_vma got_offset;
3465 Elf_Internal_Rela rela;
3466 bfd_byte *loc;
3467
3468 /* This symbol has an entry in the procedure linkage table. Set
3469 it up. */
3470 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3471 {
3472 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3473 htab, h->plt.offset,
3474 eh->ifunc_resolver_address +
3475 eh->ifunc_resolver_section->output_offset +
3476 eh->ifunc_resolver_section->output_section->vma);
3477
3478 /* Do not return yet. Handling of explicit GOT slots of
3479 IFUNC symbols is below. */
3480 }
3481 else
3482 {
3483 if (h->dynindx == -1
3484 || htab->elf.splt == NULL
3485 || htab->elf.sgotplt == NULL
3486 || htab->elf.srelplt == NULL)
3487 abort ();
3488
3489 /* Calc. index no.
3490 Current offset - size first entry / entry size. */
3491 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3492
3493 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3494 addr & GOT addr. */
3495 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3496
3497 /* Fill in the blueprint of a PLT. */
3498 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3499 PLT_ENTRY_SIZE);
3500
3501 /* Fixup the relative address to the GOT entry */
3502 bfd_put_32 (output_bfd,
3503 (htab->elf.sgotplt->output_section->vma +
3504 htab->elf.sgotplt->output_offset + got_offset
3505 - (htab->elf.splt->output_section->vma +
3506 htab->elf.splt->output_offset +
3507 h->plt.offset))/2,
3508 htab->elf.splt->contents + h->plt.offset + 2);
3509 /* Fixup the relative branch to PLT 0 */
3510 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3511 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3512 htab->elf.splt->contents + h->plt.offset + 24);
3513 /* Fixup offset into .rela.plt section. */
3514 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3515 htab->elf.splt->contents + h->plt.offset + 28);
3516
3517 /* Fill in the entry in the global offset table.
3518 Points to instruction after GOT offset. */
3519 bfd_put_64 (output_bfd,
3520 (htab->elf.splt->output_section->vma
3521 + htab->elf.splt->output_offset
3522 + h->plt.offset
3523 + 14),
3524 htab->elf.sgotplt->contents + got_offset);
3525
3526 /* Fill in the entry in the .rela.plt section. */
3527 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3528 + htab->elf.sgotplt->output_offset
3529 + got_offset);
3530 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3531 rela.r_addend = 0;
3532 loc = htab->elf.srelplt->contents + plt_index *
3533 sizeof (Elf64_External_Rela);
3534 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3535
3536 if (!h->def_regular)
3537 {
3538 /* Mark the symbol as undefined, rather than as defined in
3539 the .plt section. Leave the value alone. This is a clue
3540 for the dynamic linker, to make function pointer
3541 comparisons work between an application and shared
3542 library. */
3543 sym->st_shndx = SHN_UNDEF;
3544 }
3545 }
3546 }
3547
3548 if (h->got.offset != (bfd_vma) -1
3549 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3550 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3551 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3552 {
3553 Elf_Internal_Rela rela;
3554 bfd_byte *loc;
3555
3556 /* This symbol has an entry in the global offset table. Set it
3557 up. */
3558 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3559 abort ();
3560
3561 rela.r_offset = (htab->elf.sgot->output_section->vma
3562 + htab->elf.sgot->output_offset
3563 + (h->got.offset &~ (bfd_vma) 1));
3564
3565 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3566 {
3567 if (bfd_link_pic (info))
3568 {
3569 /* An explicit GOT slot usage needs GLOB_DAT. If the
3570 symbol references local the implicit got.iplt slot
3571 will be used and the IRELATIVE reloc has been created
3572 above. */
3573 goto do_glob_dat;
3574 }
3575 else
3576 {
3577 /* For non-shared objects explicit GOT slots must be
3578 filled with the PLT slot address for pointer
3579 equality reasons. */
3580 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3581 + htab->elf.iplt->output_offset
3582 + h->plt.offset),
3583 htab->elf.sgot->contents + h->got.offset);
3584 return TRUE;
3585 }
3586 }
3587 else if (bfd_link_pic (info)
3588 && SYMBOL_REFERENCES_LOCAL (info, h))
3589 {
3590 /* If this is a static link, or it is a -Bsymbolic link and
3591 the symbol is defined locally or was forced to be local
3592 because of a version file, we just want to emit a
3593 RELATIVE reloc. The entry in the global offset table
3594 will already have been initialized in the
3595 relocate_section function. */
3596 if (!h->def_regular)
3597 return FALSE;
3598 BFD_ASSERT((h->got.offset & 1) != 0);
3599 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3600 rela.r_addend = (h->root.u.def.value
3601 + h->root.u.def.section->output_section->vma
3602 + h->root.u.def.section->output_offset);
3603 }
3604 else
3605 {
3606 BFD_ASSERT((h->got.offset & 1) == 0);
3607 do_glob_dat:
3608 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3609 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3610 rela.r_addend = 0;
3611 }
3612
3613 loc = htab->elf.srelgot->contents;
3614 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3615 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3616 }
3617
3618 if (h->needs_copy)
3619 {
3620 Elf_Internal_Rela rela;
3621 bfd_byte *loc;
3622
3623 /* This symbols needs a copy reloc. Set it up. */
3624
3625 if (h->dynindx == -1
3626 || (h->root.type != bfd_link_hash_defined
3627 && h->root.type != bfd_link_hash_defweak)
3628 || htab->srelbss == NULL)
3629 abort ();
3630
3631 rela.r_offset = (h->root.u.def.value
3632 + h->root.u.def.section->output_section->vma
3633 + h->root.u.def.section->output_offset);
3634 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3635 rela.r_addend = 0;
3636 loc = htab->srelbss->contents;
3637 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3638 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3639 }
3640
3641 /* Mark some specially defined symbols as absolute. */
3642 if (h == htab->elf.hdynamic
3643 || h == htab->elf.hgot
3644 || h == htab->elf.hplt)
3645 sym->st_shndx = SHN_ABS;
3646
3647 return TRUE;
3648 }
3649
3650 /* Used to decide how to sort relocs in an optimal manner for the
3651 dynamic linker, before writing them out. */
3652
3653 static enum elf_reloc_type_class
3654 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3655 const asection *rel_sec ATTRIBUTE_UNUSED,
3656 const Elf_Internal_Rela *rela)
3657 {
3658 bfd *abfd = info->output_bfd;
3659 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3660 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3661 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3662 Elf_Internal_Sym sym;
3663
3664 if (htab->elf.dynsym == NULL
3665 || !bed->s->swap_symbol_in (abfd,
3666 (htab->elf.dynsym->contents
3667 + r_symndx * bed->s->sizeof_sym),
3668 0, &sym))
3669 abort ();
3670
3671 /* Check relocation against STT_GNU_IFUNC symbol. */
3672 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3673 return reloc_class_ifunc;
3674
3675 switch ((int) ELF64_R_TYPE (rela->r_info))
3676 {
3677 case R_390_RELATIVE:
3678 return reloc_class_relative;
3679 case R_390_JMP_SLOT:
3680 return reloc_class_plt;
3681 case R_390_COPY:
3682 return reloc_class_copy;
3683 default:
3684 return reloc_class_normal;
3685 }
3686 }
3687
3688 /* Finish up the dynamic sections. */
3689
3690 static bfd_boolean
3691 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3692 struct bfd_link_info *info)
3693 {
3694 struct elf_s390_link_hash_table *htab;
3695 bfd *dynobj;
3696 asection *sdyn;
3697 bfd *ibfd;
3698 unsigned int i;
3699
3700 htab = elf_s390_hash_table (info);
3701 if (htab == NULL)
3702 return FALSE;
3703
3704 dynobj = htab->elf.dynobj;
3705 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3706
3707 if (htab->elf.dynamic_sections_created)
3708 {
3709 Elf64_External_Dyn *dyncon, *dynconend;
3710
3711 if (sdyn == NULL || htab->elf.sgot == NULL)
3712 abort ();
3713
3714 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3715 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3716 for (; dyncon < dynconend; dyncon++)
3717 {
3718 Elf_Internal_Dyn dyn;
3719 asection *s;
3720
3721 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3722
3723 switch (dyn.d_tag)
3724 {
3725 default:
3726 continue;
3727
3728 case DT_PLTGOT:
3729 s = htab->elf.sgotplt;
3730 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3731 break;
3732
3733 case DT_JMPREL:
3734 s = htab->elf.srelplt;
3735 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3736 break;
3737
3738 case DT_PLTRELSZ:
3739 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3740 break;
3741
3742 case DT_RELASZ:
3743 /* The procedure linkage table relocs (DT_JMPREL) should
3744 not be included in the overall relocs (DT_RELA).
3745 Therefore, we override the DT_RELASZ entry here to
3746 make it not include the JMPREL relocs. Since the
3747 linker script arranges for .rela.plt to follow all
3748 other relocation sections, we don't have to worry
3749 about changing the DT_RELA entry. */
3750 dyn.d_un.d_val -= htab->elf.srelplt->size + htab->elf.irelplt->size;
3751 break;
3752 }
3753
3754 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3755 }
3756
3757 /* Fill in the special first entry in the procedure linkage table. */
3758 if (htab->elf.splt && htab->elf.splt->size > 0)
3759 {
3760 /* fill in blueprint for plt 0 entry */
3761 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3762 PLT_FIRST_ENTRY_SIZE);
3763 /* Fixup relative address to start of GOT */
3764 bfd_put_32 (output_bfd,
3765 (htab->elf.sgotplt->output_section->vma
3766 + htab->elf.sgotplt->output_offset
3767 - htab->elf.splt->output_section->vma
3768 - htab->elf.splt->output_offset - 6)/2,
3769 htab->elf.splt->contents + 8);
3770 }
3771 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3772 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3773 = PLT_ENTRY_SIZE;
3774 }
3775
3776 if (htab->elf.sgotplt)
3777 {
3778 /* Fill in the first three entries in the global offset table. */
3779 if (htab->elf.sgotplt->size > 0)
3780 {
3781 bfd_put_64 (output_bfd,
3782 (sdyn == NULL ? (bfd_vma) 0
3783 : sdyn->output_section->vma + sdyn->output_offset),
3784 htab->elf.sgotplt->contents);
3785 /* One entry for shared object struct ptr. */
3786 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3787 /* One entry for _dl_runtime_resolve. */
3788 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
3789 }
3790
3791 elf_section_data (htab->elf.sgot->output_section)
3792 ->this_hdr.sh_entsize = 8;
3793 }
3794
3795 /* Finish dynamic symbol for local IFUNC symbols. */
3796 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3797 {
3798 struct plt_entry *local_plt;
3799 Elf_Internal_Sym *isym;
3800 Elf_Internal_Shdr *symtab_hdr;
3801
3802 symtab_hdr = &elf_symtab_hdr (ibfd);
3803
3804 local_plt = elf_s390_local_plt (ibfd);
3805 if (local_plt != NULL)
3806 for (i = 0; i < symtab_hdr->sh_info; i++)
3807 {
3808 if (local_plt[i].plt.offset != (bfd_vma) -1)
3809 {
3810 asection *sec = local_plt[i].sec;
3811 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3812 if (isym == NULL)
3813 return FALSE;
3814
3815 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3816 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3817 local_plt[i].plt.offset,
3818 isym->st_value
3819 + sec->output_section->vma
3820 + sec->output_offset);
3821
3822 }
3823 }
3824 }
3825
3826 return TRUE;
3827 }
3828 \f
3829 /* Support for core dump NOTE sections. */
3830
3831 static bfd_boolean
3832 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3833 {
3834 int offset;
3835 size_t size;
3836
3837 switch (note->descsz)
3838 {
3839 default:
3840 return FALSE;
3841
3842 case 336: /* sizeof(struct elf_prstatus) on s390x */
3843 /* pr_cursig */
3844 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3845
3846 /* pr_pid */
3847 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3848
3849 /* pr_reg */
3850 offset = 112;
3851 size = 216;
3852 break;
3853 }
3854
3855 /* Make a ".reg/999" section. */
3856 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3857 size, note->descpos + offset);
3858 }
3859
3860 static bfd_boolean
3861 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3862 {
3863 switch (note->descsz)
3864 {
3865 default:
3866 return FALSE;
3867
3868 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3869 elf_tdata (abfd)->core->pid
3870 = bfd_get_32 (abfd, note->descdata + 24);
3871 elf_tdata (abfd)->core->program
3872 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3873 elf_tdata (abfd)->core->command
3874 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3875 }
3876
3877 /* Note that for some reason, a spurious space is tacked
3878 onto the end of the args in some (at least one anyway)
3879 implementations, so strip it off if it exists. */
3880
3881 {
3882 char *command = elf_tdata (abfd)->core->command;
3883 int n = strlen (command);
3884
3885 if (0 < n && command[n - 1] == ' ')
3886 command[n - 1] = '\0';
3887 }
3888
3889 return TRUE;
3890 }
3891
3892 static char *
3893 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3894 int note_type, ...)
3895 {
3896 va_list ap;
3897
3898 switch (note_type)
3899 {
3900 default:
3901 return NULL;
3902
3903 case NT_PRPSINFO:
3904 {
3905 char data[136] = { 0 };
3906 const char *fname, *psargs;
3907
3908 va_start (ap, note_type);
3909 fname = va_arg (ap, const char *);
3910 psargs = va_arg (ap, const char *);
3911 va_end (ap);
3912
3913 strncpy (data + 40, fname, 16);
3914 strncpy (data + 56, psargs, 80);
3915 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3916 &data, sizeof (data));
3917 }
3918
3919 case NT_PRSTATUS:
3920 {
3921 char data[336] = { 0 };
3922 long pid;
3923 int cursig;
3924 const void *gregs;
3925
3926 va_start (ap, note_type);
3927 pid = va_arg (ap, long);
3928 cursig = va_arg (ap, int);
3929 gregs = va_arg (ap, const void *);
3930 va_end (ap);
3931
3932 bfd_put_16 (abfd, cursig, data + 12);
3933 bfd_put_32 (abfd, pid, data + 32);
3934 memcpy (data + 112, gregs, 216);
3935 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3936 &data, sizeof (data));
3937 }
3938 }
3939 /* NOTREACHED */
3940 }
3941 \f
3942 /* Return address for Ith PLT stub in section PLT, for relocation REL
3943 or (bfd_vma) -1 if it should not be included. */
3944
3945 static bfd_vma
3946 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3947 const arelent *rel ATTRIBUTE_UNUSED)
3948 {
3949 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3950 }
3951
3952 /* Merge backend specific data from an object file to the output
3953 object file when linking. */
3954
3955 static bfd_boolean
3956 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3957 {
3958 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3959 return TRUE;
3960
3961 return elf_s390_merge_obj_attributes (ibfd, info);
3962 }
3963
3964 /* Why was the hash table entry size definition changed from
3965 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3966 this is the only reason for the s390_elf64_size_info structure. */
3967
3968 const struct elf_size_info s390_elf64_size_info =
3969 {
3970 sizeof (Elf64_External_Ehdr),
3971 sizeof (Elf64_External_Phdr),
3972 sizeof (Elf64_External_Shdr),
3973 sizeof (Elf64_External_Rel),
3974 sizeof (Elf64_External_Rela),
3975 sizeof (Elf64_External_Sym),
3976 sizeof (Elf64_External_Dyn),
3977 sizeof (Elf_External_Note),
3978 8, /* hash-table entry size. */
3979 1, /* internal relocations per external relocations. */
3980 64, /* arch_size. */
3981 3, /* log_file_align. */
3982 ELFCLASS64, EV_CURRENT,
3983 bfd_elf64_write_out_phdrs,
3984 bfd_elf64_write_shdrs_and_ehdr,
3985 bfd_elf64_checksum_contents,
3986 bfd_elf64_write_relocs,
3987 bfd_elf64_swap_symbol_in,
3988 bfd_elf64_swap_symbol_out,
3989 bfd_elf64_slurp_reloc_table,
3990 bfd_elf64_slurp_symbol_table,
3991 bfd_elf64_swap_dyn_in,
3992 bfd_elf64_swap_dyn_out,
3993 bfd_elf64_swap_reloc_in,
3994 bfd_elf64_swap_reloc_out,
3995 bfd_elf64_swap_reloca_in,
3996 bfd_elf64_swap_reloca_out
3997 };
3998
3999 #define TARGET_BIG_SYM s390_elf64_vec
4000 #define TARGET_BIG_NAME "elf64-s390"
4001 #define ELF_ARCH bfd_arch_s390
4002 #define ELF_TARGET_ID S390_ELF_DATA
4003 #define ELF_MACHINE_CODE EM_S390
4004 #define ELF_MACHINE_ALT1 EM_S390_OLD
4005 #define ELF_MAXPAGESIZE 0x1000
4006
4007 #define elf_backend_size_info s390_elf64_size_info
4008
4009 #define elf_backend_can_gc_sections 1
4010 #define elf_backend_can_refcount 1
4011 #define elf_backend_want_got_plt 1
4012 #define elf_backend_plt_readonly 1
4013 #define elf_backend_want_plt_sym 0
4014 #define elf_backend_got_header_size 24
4015 #define elf_backend_rela_normal 1
4016
4017 #define elf_info_to_howto elf_s390_info_to_howto
4018
4019 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
4020 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
4021 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4022 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4023 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
4024
4025 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4026 #define elf_backend_check_relocs elf_s390_check_relocs
4027 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4028 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4029 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4030 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4031 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4032 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4033 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4034 #define elf_backend_relocate_section elf_s390_relocate_section
4035 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4036 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4037 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4038 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4039 #define elf_backend_write_core_note elf_s390_write_core_note
4040 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4041 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4042 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4043
4044 #define bfd_elf64_mkobject elf_s390_mkobject
4045 #define elf_backend_object_p elf_s390_object_p
4046
4047 #include "elf64-target.h"
GDB Binutils - Deliverables
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