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