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[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2020 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 "elf-s390.h"
29 #include <stdarg.h>
30
31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33 #define MINUS_ONE (((bfd_vma)0) - 1)
34
35 static bfd_reloc_status_type
36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
37 asection *, bfd *, char **);
38 static bfd_reloc_status_type
39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
40 asection *, bfd *, char **);
41
42 /* The relocation "howto" table. */
43 static reloc_howto_type elf_howto_table[] =
44 {
45 HOWTO (R_390_NONE, /* type */
46 0, /* rightshift */
47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
48 0, /* bitsize */
49 FALSE, /* pc_relative */
50 0, /* bitpos */
51 complain_overflow_dont, /* complain_on_overflow */
52 bfd_elf_generic_reloc, /* special_function */
53 "R_390_NONE", /* name */
54 FALSE, /* partial_inplace */
55 0, /* src_mask */
56 0, /* dst_mask */
57 FALSE), /* pcrel_offset */
58
59 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
75 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
79 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
81 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
83 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
85 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
87 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
99 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
101 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
103 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
105 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
107 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
109 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
111 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
113 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
115 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
123 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
125 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
138 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
140 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
149 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
151 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
154 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
165 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
169 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
173 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
175 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
181 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
183 };
184
185 /* GNU extension to record C++ vtable hierarchy. */
186 static reloc_howto_type elf64_s390_vtinherit_howto =
187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
188 static reloc_howto_type elf64_s390_vtentry_howto =
189 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);
190
191 static reloc_howto_type *
192 elf_s390_reloc_type_lookup (bfd *abfd,
193 bfd_reloc_code_real_type code)
194 {
195 switch (code)
196 {
197 case BFD_RELOC_NONE:
198 return &elf_howto_table[(int) R_390_NONE];
199 case BFD_RELOC_8:
200 return &elf_howto_table[(int) R_390_8];
201 case BFD_RELOC_390_12:
202 return &elf_howto_table[(int) R_390_12];
203 case BFD_RELOC_16:
204 return &elf_howto_table[(int) R_390_16];
205 case BFD_RELOC_32:
206 return &elf_howto_table[(int) R_390_32];
207 case BFD_RELOC_CTOR:
208 return &elf_howto_table[(int) R_390_32];
209 case BFD_RELOC_32_PCREL:
210 return &elf_howto_table[(int) R_390_PC32];
211 case BFD_RELOC_390_GOT12:
212 return &elf_howto_table[(int) R_390_GOT12];
213 case BFD_RELOC_32_GOT_PCREL:
214 return &elf_howto_table[(int) R_390_GOT32];
215 case BFD_RELOC_390_PLT32:
216 return &elf_howto_table[(int) R_390_PLT32];
217 case BFD_RELOC_390_COPY:
218 return &elf_howto_table[(int) R_390_COPY];
219 case BFD_RELOC_390_GLOB_DAT:
220 return &elf_howto_table[(int) R_390_GLOB_DAT];
221 case BFD_RELOC_390_JMP_SLOT:
222 return &elf_howto_table[(int) R_390_JMP_SLOT];
223 case BFD_RELOC_390_RELATIVE:
224 return &elf_howto_table[(int) R_390_RELATIVE];
225 case BFD_RELOC_32_GOTOFF:
226 return &elf_howto_table[(int) R_390_GOTOFF32];
227 case BFD_RELOC_390_GOTPC:
228 return &elf_howto_table[(int) R_390_GOTPC];
229 case BFD_RELOC_390_GOT16:
230 return &elf_howto_table[(int) R_390_GOT16];
231 case BFD_RELOC_16_PCREL:
232 return &elf_howto_table[(int) R_390_PC16];
233 case BFD_RELOC_390_PC12DBL:
234 return &elf_howto_table[(int) R_390_PC12DBL];
235 case BFD_RELOC_390_PLT12DBL:
236 return &elf_howto_table[(int) R_390_PLT12DBL];
237 case BFD_RELOC_390_PC16DBL:
238 return &elf_howto_table[(int) R_390_PC16DBL];
239 case BFD_RELOC_390_PLT16DBL:
240 return &elf_howto_table[(int) R_390_PLT16DBL];
241 case BFD_RELOC_390_PC24DBL:
242 return &elf_howto_table[(int) R_390_PC24DBL];
243 case BFD_RELOC_390_PLT24DBL:
244 return &elf_howto_table[(int) R_390_PLT24DBL];
245 case BFD_RELOC_390_PC32DBL:
246 return &elf_howto_table[(int) R_390_PC32DBL];
247 case BFD_RELOC_390_PLT32DBL:
248 return &elf_howto_table[(int) R_390_PLT32DBL];
249 case BFD_RELOC_390_GOTPCDBL:
250 return &elf_howto_table[(int) R_390_GOTPCDBL];
251 case BFD_RELOC_64:
252 return &elf_howto_table[(int) R_390_64];
253 case BFD_RELOC_64_PCREL:
254 return &elf_howto_table[(int) R_390_PC64];
255 case BFD_RELOC_390_GOT64:
256 return &elf_howto_table[(int) R_390_GOT64];
257 case BFD_RELOC_390_PLT64:
258 return &elf_howto_table[(int) R_390_PLT64];
259 case BFD_RELOC_390_GOTENT:
260 return &elf_howto_table[(int) R_390_GOTENT];
261 case BFD_RELOC_16_GOTOFF:
262 return &elf_howto_table[(int) R_390_GOTOFF16];
263 case BFD_RELOC_390_GOTOFF64:
264 return &elf_howto_table[(int) R_390_GOTOFF64];
265 case BFD_RELOC_390_GOTPLT12:
266 return &elf_howto_table[(int) R_390_GOTPLT12];
267 case BFD_RELOC_390_GOTPLT16:
268 return &elf_howto_table[(int) R_390_GOTPLT16];
269 case BFD_RELOC_390_GOTPLT32:
270 return &elf_howto_table[(int) R_390_GOTPLT32];
271 case BFD_RELOC_390_GOTPLT64:
272 return &elf_howto_table[(int) R_390_GOTPLT64];
273 case BFD_RELOC_390_GOTPLTENT:
274 return &elf_howto_table[(int) R_390_GOTPLTENT];
275 case BFD_RELOC_390_PLTOFF16:
276 return &elf_howto_table[(int) R_390_PLTOFF16];
277 case BFD_RELOC_390_PLTOFF32:
278 return &elf_howto_table[(int) R_390_PLTOFF32];
279 case BFD_RELOC_390_PLTOFF64:
280 return &elf_howto_table[(int) R_390_PLTOFF64];
281 case BFD_RELOC_390_TLS_LOAD:
282 return &elf_howto_table[(int) R_390_TLS_LOAD];
283 case BFD_RELOC_390_TLS_GDCALL:
284 return &elf_howto_table[(int) R_390_TLS_GDCALL];
285 case BFD_RELOC_390_TLS_LDCALL:
286 return &elf_howto_table[(int) R_390_TLS_LDCALL];
287 case BFD_RELOC_390_TLS_GD64:
288 return &elf_howto_table[(int) R_390_TLS_GD64];
289 case BFD_RELOC_390_TLS_GOTIE12:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
291 case BFD_RELOC_390_TLS_GOTIE64:
292 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
293 case BFD_RELOC_390_TLS_LDM64:
294 return &elf_howto_table[(int) R_390_TLS_LDM64];
295 case BFD_RELOC_390_TLS_IE64:
296 return &elf_howto_table[(int) R_390_TLS_IE64];
297 case BFD_RELOC_390_TLS_IEENT:
298 return &elf_howto_table[(int) R_390_TLS_IEENT];
299 case BFD_RELOC_390_TLS_LE64:
300 return &elf_howto_table[(int) R_390_TLS_LE64];
301 case BFD_RELOC_390_TLS_LDO64:
302 return &elf_howto_table[(int) R_390_TLS_LDO64];
303 case BFD_RELOC_390_TLS_DTPMOD:
304 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
305 case BFD_RELOC_390_TLS_DTPOFF:
306 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
307 case BFD_RELOC_390_TLS_TPOFF:
308 return &elf_howto_table[(int) R_390_TLS_TPOFF];
309 case BFD_RELOC_390_20:
310 return &elf_howto_table[(int) R_390_20];
311 case BFD_RELOC_390_GOT20:
312 return &elf_howto_table[(int) R_390_GOT20];
313 case BFD_RELOC_390_GOTPLT20:
314 return &elf_howto_table[(int) R_390_GOTPLT20];
315 case BFD_RELOC_390_TLS_GOTIE20:
316 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
317 case BFD_RELOC_390_IRELATIVE:
318 return &elf_howto_table[(int) R_390_IRELATIVE];
319 case BFD_RELOC_VTABLE_INHERIT:
320 return &elf64_s390_vtinherit_howto;
321 case BFD_RELOC_VTABLE_ENTRY:
322 return &elf64_s390_vtentry_howto;
323 default:
324 break;
325 }
326
327 /* xgettext:c-format */
328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
329 bfd_set_error (bfd_error_bad_value);
330 return NULL;
331 }
332
333 static reloc_howto_type *
334 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
335 const char *r_name)
336 {
337 unsigned int i;
338
339 for (i = 0;
340 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
341 i++)
342 if (elf_howto_table[i].name != NULL
343 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
344 return &elf_howto_table[i];
345
346 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
347 return &elf64_s390_vtinherit_howto;
348 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
349 return &elf64_s390_vtentry_howto;
350
351 return NULL;
352 }
353
354 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
355 and elf64-s390.c has its own copy. */
356
357 static bfd_boolean
358 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
359 arelent *cache_ptr,
360 Elf_Internal_Rela *dst)
361 {
362 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
363
364 switch (r_type)
365 {
366 case R_390_GNU_VTINHERIT:
367 cache_ptr->howto = &elf64_s390_vtinherit_howto;
368 break;
369
370 case R_390_GNU_VTENTRY:
371 cache_ptr->howto = &elf64_s390_vtentry_howto;
372 break;
373
374 default:
375 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
376 {
377 /* xgettext:c-format */
378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
379 abfd, r_type);
380 bfd_set_error (bfd_error_bad_value);
381 return FALSE;
382 }
383 cache_ptr->howto = &elf_howto_table[r_type];
384 }
385 return TRUE;
386 }
387
388 /* A relocation function which doesn't do anything. */
389 static bfd_reloc_status_type
390 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
391 arelent *reloc_entry,
392 asymbol *symbol ATTRIBUTE_UNUSED,
393 void * data ATTRIBUTE_UNUSED,
394 asection *input_section,
395 bfd *output_bfd,
396 char **error_message ATTRIBUTE_UNUSED)
397 {
398 if (output_bfd)
399 reloc_entry->address += input_section->output_offset;
400 return bfd_reloc_ok;
401 }
402
403 /* Handle the large displacement relocs. */
404 static bfd_reloc_status_type
405 s390_elf_ldisp_reloc (bfd *abfd,
406 arelent *reloc_entry,
407 asymbol *symbol,
408 void * data,
409 asection *input_section,
410 bfd *output_bfd,
411 char **error_message ATTRIBUTE_UNUSED)
412 {
413 reloc_howto_type *howto = reloc_entry->howto;
414 bfd_vma relocation;
415 bfd_vma insn;
416
417 if (output_bfd != (bfd *) NULL
418 && (symbol->flags & BSF_SECTION_SYM) == 0
419 && (! howto->partial_inplace
420 || reloc_entry->addend == 0))
421 {
422 reloc_entry->address += input_section->output_offset;
423 return bfd_reloc_ok;
424 }
425 if (output_bfd != NULL)
426 return bfd_reloc_continue;
427
428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
429 return bfd_reloc_outofrange;
430
431 relocation = (symbol->value
432 + symbol->section->output_section->vma
433 + symbol->section->output_offset);
434 relocation += reloc_entry->addend;
435 if (howto->pc_relative)
436 {
437 relocation -= (input_section->output_section->vma
438 + input_section->output_offset);
439 relocation -= reloc_entry->address;
440 }
441
442 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
443 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
444 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
445
446 if ((bfd_signed_vma) relocation < - 0x80000
447 || (bfd_signed_vma) relocation > 0x7ffff)
448 return bfd_reloc_overflow;
449 else
450 return bfd_reloc_ok;
451 }
452
453 static bfd_boolean
454 elf_s390_is_local_label_name (bfd *abfd, const char *name)
455 {
456 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
457 return TRUE;
458
459 return _bfd_elf_is_local_label_name (abfd, name);
460 }
461
462 /* Functions for the 390 ELF linker. */
463
464 /* The name of the dynamic interpreter. This is put in the .interp
465 section. */
466
467 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
468
469 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
470 copying dynamic variables from a shared lib into an app's dynbss
471 section, and instead use a dynamic relocation to point into the
472 shared lib. */
473 #define ELIMINATE_COPY_RELOCS 1
474
475 /* The size in bytes of the first entry in the procedure linkage table. */
476 #define PLT_FIRST_ENTRY_SIZE 32
477 /* The size in bytes of an entry in the procedure linkage table. */
478 #define PLT_ENTRY_SIZE 32
479
480 #define GOT_ENTRY_SIZE 8
481
482 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
483
484 /* The first three entries in a global offset table are reserved,
485 and the initial contents are unimportant (we zero them out).
486 Subsequent entries look like this. See the SVR4 ABI 386
487 supplement to see how this works. */
488
489 /* For the s390, simple addr offset can only be 0 - 4096.
490 To use the full 16777216 TB address space, several instructions
491 are needed to load an address in a register and execute
492 a branch( or just saving the address)
493
494 Furthermore, only r 0 and 1 are free to use!!! */
495
496 /* The first 3 words in the GOT are then reserved.
497 Word 0 is the address of the dynamic table.
498 Word 1 is a pointer to a structure describing the object
499 Word 2 is used to point to the loader entry address.
500
501 The code for PLT entries looks like this:
502
503 The GOT holds the address in the PLT to be executed.
504 The loader then gets:
505 48(15) = Pointer to the structure describing the object.
506 56(15) = Offset in symbol table
507 The loader must then find the module where the function is
508 and insert the address in the GOT.
509
510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
511 LG 1,0(1) # 6 bytes Load address from GOT in r1
512 BCR 15,1 # 2 bytes Jump to address
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1
515 BRCL 15,-x # 6 bytes Jump to first PLT entry
516 .long ? # 4 bytes offset into .rela.plt
517
518 Total = 32 bytes per PLT entry
519 Fixup at offset 2: relative address to GOT entry
520 Fixup at offset 22: relative branch to PLT0
521 Fixup at offset 28: 32 bit offset into .rela.plt
522
523 A 32 bit offset into the symbol table is enough. It allows for
524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
525 object (the main program, any shared library) is limited to 4GB in
526 size. Having a .rela.plt of 2GB would already make the .plt
527 section bigger than 8GB. */
528
529 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
530 {
531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
533 0x07, 0xf1, /* br %r1 */
534 0x0d, 0x10, /* basr %r1,%r0 */
535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
538 };
539
540 /* The first PLT entry pushes the offset into the symbol table
541 from R1 onto the stack at 56(15) and the loader object info
542 at 48(15), loads the loader address in R1 and jumps to it. */
543
544 /* The first entry in the PLT:
545
546 PLT0:
547 STG 1,56(15) # r1 contains the offset into the symbol table
548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
550 LG 1,16(1) # get entry address of loader
551 BCR 15,1 # jump to loader
552
553 Fixup at offset 8: relative address to start of GOT. */
554
555 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
556 {
557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
561 0x07, 0xf1, /* br %r1 */
562 0x07, 0x00, /* nopr %r0 */
563 0x07, 0x00, /* nopr %r0 */
564 0x07, 0x00 /* nopr %r0 */
565 };
566
567
568 /* s390 ELF linker hash entry. */
569
570 struct elf_s390_link_hash_entry
571 {
572 struct elf_link_hash_entry elf;
573
574 /* Number of GOTPLT references for a function. */
575 bfd_signed_vma gotplt_refcount;
576
577 #define GOT_UNKNOWN 0
578 #define GOT_NORMAL 1
579 #define GOT_TLS_GD 2
580 #define GOT_TLS_IE 3
581 #define GOT_TLS_IE_NLT 3
582 unsigned char tls_type;
583
584 /* For pointer equality reasons we might need to change the symbol
585 type from STT_GNU_IFUNC to STT_FUNC together with its value and
586 section entry. So after alloc_dynrelocs only these values should
587 be used. In order to check whether a symbol is IFUNC use
588 s390_is_ifunc_symbol_p. */
589 bfd_vma ifunc_resolver_address;
590 asection *ifunc_resolver_section;
591 };
592
593 #define elf_s390_hash_entry(ent) \
594 ((struct elf_s390_link_hash_entry *)(ent))
595
596 /* This structure represents an entry in the local PLT list needed for
597 local IFUNC symbols. */
598 struct plt_entry
599 {
600 /* The section of the local symbol.
601 Set in relocate_section and used in finish_dynamic_sections. */
602 asection *sec;
603
604 union
605 {
606 bfd_signed_vma refcount;
607 bfd_vma offset;
608 } plt;
609 };
610
611 /* NOTE: Keep this structure in sync with
612 the one declared in elf32-s390.c. */
613 struct elf_s390_obj_tdata
614 {
615 struct elf_obj_tdata root;
616
617 /* A local PLT is needed for ifunc symbols. */
618 struct plt_entry *local_plt;
619
620 /* TLS type for each local got entry. */
621 char *local_got_tls_type;
622 };
623
624 #define elf_s390_tdata(abfd) \
625 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
626
627 #define elf_s390_local_plt(abfd) \
628 (elf_s390_tdata (abfd)->local_plt)
629
630 #define elf_s390_local_got_tls_type(abfd) \
631 (elf_s390_tdata (abfd)->local_got_tls_type)
632
633 #define is_s390_elf(bfd) \
634 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
635 && elf_tdata (bfd) != NULL \
636 && elf_object_id (bfd) == S390_ELF_DATA)
637
638 static bfd_boolean
639 elf_s390_mkobject (bfd *abfd)
640 {
641 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
642 S390_ELF_DATA);
643 }
644
645 static bfd_boolean
646 elf_s390_object_p (bfd *abfd)
647 {
648 /* Set the right machine number for an s390 elf32 file. */
649 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
650 }
651
652 /* s390 ELF linker hash table. */
653
654 struct elf_s390_link_hash_table
655 {
656 struct elf_link_hash_table elf;
657
658 /* Short-cuts to get to dynamic linker sections. */
659 asection *irelifunc;
660
661 union {
662 bfd_signed_vma refcount;
663 bfd_vma offset;
664 } tls_ldm_got;
665
666 /* Small local sym cache. */
667 struct sym_cache sym_cache;
668
669 /* Options passed from the linker. */
670 struct s390_elf_params *params;
671 };
672
673 /* Get the s390 ELF linker hash table from a link_info structure. */
674
675 #define elf_s390_hash_table(p) \
676 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
677 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
678
679 #define ELF64 1
680 #include "elf-s390-common.c"
681
682 /* Create an entry in an s390 ELF linker hash table. */
683
684 static struct bfd_hash_entry *
685 link_hash_newfunc (struct bfd_hash_entry *entry,
686 struct bfd_hash_table *table,
687 const char *string)
688 {
689 /* Allocate the structure if it has not already been allocated by a
690 subclass. */
691 if (entry == NULL)
692 {
693 entry = bfd_hash_allocate (table,
694 sizeof (struct elf_s390_link_hash_entry));
695 if (entry == NULL)
696 return entry;
697 }
698
699 /* Call the allocation method of the superclass. */
700 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
701 if (entry != NULL)
702 {
703 struct elf_s390_link_hash_entry *eh;
704
705 eh = (struct elf_s390_link_hash_entry *) entry;
706 eh->gotplt_refcount = 0;
707 eh->tls_type = GOT_UNKNOWN;
708 eh->ifunc_resolver_address = 0;
709 eh->ifunc_resolver_section = NULL;
710 }
711
712 return entry;
713 }
714
715 /* Create an s390 ELF linker hash table. */
716
717 static struct bfd_link_hash_table *
718 elf_s390_link_hash_table_create (bfd *abfd)
719 {
720 struct elf_s390_link_hash_table *ret;
721 size_t amt = sizeof (struct elf_s390_link_hash_table);
722
723 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
724 if (ret == NULL)
725 return NULL;
726
727 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
728 sizeof (struct elf_s390_link_hash_entry),
729 S390_ELF_DATA))
730 {
731 free (ret);
732 return NULL;
733 }
734
735 return &ret->elf.root;
736 }
737
738 /* Copy the extra info we tack onto an elf_link_hash_entry. */
739
740 static void
741 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
742 struct elf_link_hash_entry *dir,
743 struct elf_link_hash_entry *ind)
744 {
745 struct elf_s390_link_hash_entry *edir, *eind;
746
747 edir = (struct elf_s390_link_hash_entry *) dir;
748 eind = (struct elf_s390_link_hash_entry *) ind;
749
750 if (ind->dyn_relocs != NULL)
751 {
752 if (dir->dyn_relocs != NULL)
753 {
754 struct elf_dyn_relocs **pp;
755 struct elf_dyn_relocs *p;
756
757 /* Add reloc counts against the indirect sym to the direct sym
758 list. Merge any entries against the same section. */
759 for (pp = &ind->dyn_relocs; (p = *pp) != NULL; )
760 {
761 struct elf_dyn_relocs *q;
762
763 for (q = dir->dyn_relocs; q != NULL; q = q->next)
764 if (q->sec == p->sec)
765 {
766 q->pc_count += p->pc_count;
767 q->count += p->count;
768 *pp = p->next;
769 break;
770 }
771 if (q == NULL)
772 pp = &p->next;
773 }
774 *pp = dir->dyn_relocs;
775 }
776
777 dir->dyn_relocs = ind->dyn_relocs;
778 ind->dyn_relocs = NULL;
779 }
780
781 if (ind->root.type == bfd_link_hash_indirect
782 && dir->got.refcount <= 0)
783 {
784 edir->tls_type = eind->tls_type;
785 eind->tls_type = GOT_UNKNOWN;
786 }
787
788 if (ELIMINATE_COPY_RELOCS
789 && ind->root.type != bfd_link_hash_indirect
790 && dir->dynamic_adjusted)
791 {
792 /* If called to transfer flags for a weakdef during processing
793 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
794 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
795 if (dir->versioned != versioned_hidden)
796 dir->ref_dynamic |= ind->ref_dynamic;
797 dir->ref_regular |= ind->ref_regular;
798 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
799 dir->needs_plt |= ind->needs_plt;
800 }
801 else
802 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
803 }
804
805 static int
806 elf_s390_tls_transition (struct bfd_link_info *info,
807 int r_type,
808 int is_local)
809 {
810 if (bfd_link_pic (info))
811 return r_type;
812
813 switch (r_type)
814 {
815 case R_390_TLS_GD64:
816 case R_390_TLS_IE64:
817 if (is_local)
818 return R_390_TLS_LE64;
819 return R_390_TLS_IE64;
820 case R_390_TLS_GOTIE64:
821 if (is_local)
822 return R_390_TLS_LE64;
823 return R_390_TLS_GOTIE64;
824 case R_390_TLS_LDM64:
825 return R_390_TLS_LE64;
826 }
827
828 return r_type;
829 }
830
831 /* Look through the relocs for a section during the first phase, and
832 allocate space in the global offset table or procedure linkage
833 table. */
834
835 static bfd_boolean
836 elf_s390_check_relocs (bfd *abfd,
837 struct bfd_link_info *info,
838 asection *sec,
839 const Elf_Internal_Rela *relocs)
840 {
841 struct elf_s390_link_hash_table *htab;
842 Elf_Internal_Shdr *symtab_hdr;
843 struct elf_link_hash_entry **sym_hashes;
844 const Elf_Internal_Rela *rel;
845 const Elf_Internal_Rela *rel_end;
846 asection *sreloc;
847 bfd_signed_vma *local_got_refcounts;
848 int tls_type, old_tls_type;
849
850 if (bfd_link_relocatable (info))
851 return TRUE;
852
853 BFD_ASSERT (is_s390_elf (abfd));
854
855 htab = elf_s390_hash_table (info);
856 if (htab == NULL)
857 return FALSE;
858
859 symtab_hdr = &elf_symtab_hdr (abfd);
860 sym_hashes = elf_sym_hashes (abfd);
861 local_got_refcounts = elf_local_got_refcounts (abfd);
862
863 sreloc = NULL;
864
865 rel_end = relocs + sec->reloc_count;
866 for (rel = relocs; rel < rel_end; rel++)
867 {
868 unsigned int r_type;
869 unsigned int r_symndx;
870 struct elf_link_hash_entry *h;
871 Elf_Internal_Sym *isym;
872
873 r_symndx = ELF64_R_SYM (rel->r_info);
874
875 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
876 {
877 /* xgettext:c-format */
878 _bfd_error_handler (_("%pB: bad symbol index: %d"),
879 abfd, r_symndx);
880 return FALSE;
881 }
882
883 if (r_symndx < symtab_hdr->sh_info)
884 {
885 /* A local symbol. */
886 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
887 abfd, r_symndx);
888 if (isym == NULL)
889 return FALSE;
890
891 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
892 {
893 struct plt_entry *plt;
894
895 if (htab->elf.dynobj == NULL)
896 htab->elf.dynobj = abfd;
897
898 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
899 return FALSE;
900
901 if (local_got_refcounts == NULL)
902 {
903 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
904 return FALSE;
905 local_got_refcounts = elf_local_got_refcounts (abfd);
906 }
907 plt = elf_s390_local_plt (abfd);
908 plt[r_symndx].plt.refcount++;
909 }
910 h = NULL;
911 }
912 else
913 {
914 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
915 while (h->root.type == bfd_link_hash_indirect
916 || h->root.type == bfd_link_hash_warning)
917 h = (struct elf_link_hash_entry *) h->root.u.i.link;
918 }
919
920 /* Create got section and local_got_refcounts array if they
921 are needed. */
922 r_type = elf_s390_tls_transition (info,
923 ELF64_R_TYPE (rel->r_info),
924 h == NULL);
925 switch (r_type)
926 {
927 case R_390_GOT12:
928 case R_390_GOT16:
929 case R_390_GOT20:
930 case R_390_GOT32:
931 case R_390_GOT64:
932 case R_390_GOTENT:
933 case R_390_GOTPLT12:
934 case R_390_GOTPLT16:
935 case R_390_GOTPLT20:
936 case R_390_GOTPLT32:
937 case R_390_GOTPLT64:
938 case R_390_GOTPLTENT:
939 case R_390_TLS_GD64:
940 case R_390_TLS_GOTIE12:
941 case R_390_TLS_GOTIE20:
942 case R_390_TLS_GOTIE64:
943 case R_390_TLS_IEENT:
944 case R_390_TLS_IE64:
945 case R_390_TLS_LDM64:
946 if (h == NULL
947 && local_got_refcounts == NULL)
948 {
949 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
950 return FALSE;
951 local_got_refcounts = elf_local_got_refcounts (abfd);
952 }
953
954 /* Fall through. */
955 case R_390_GOTOFF16:
956 case R_390_GOTOFF32:
957 case R_390_GOTOFF64:
958 case R_390_GOTPC:
959 case R_390_GOTPCDBL:
960 if (htab->elf.sgot == NULL)
961 {
962 if (htab->elf.dynobj == NULL)
963 htab->elf.dynobj = abfd;
964 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
965 return FALSE;
966 }
967 }
968
969 if (h != NULL)
970 {
971 if (htab->elf.dynobj == NULL)
972 htab->elf.dynobj = abfd;
973 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
974 return FALSE;
975
976 /* Make sure an IFUNC symbol defined in a non-shared object
977 always gets a PLT slot. */
978 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
979 {
980 /* The symbol is called by the dynamic loader in order
981 to resolve the relocation. So it is in fact also
982 referenced. */
983 h->ref_regular = 1;
984 h->needs_plt = 1;
985 }
986 }
987
988 switch (r_type)
989 {
990 case R_390_GOTPC:
991 case R_390_GOTPCDBL:
992 /* These relocs do not need a GOT slot. They just load the
993 GOT pointer itself or address something else relative to
994 the GOT. Since the GOT pointer has been set up above we
995 are done. */
996 break;
997 case R_390_GOTOFF16:
998 case R_390_GOTOFF32:
999 case R_390_GOTOFF64:
1000 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1001 break;
1002 /* Fall through. */
1003
1004 case R_390_PLT12DBL:
1005 case R_390_PLT16DBL:
1006 case R_390_PLT24DBL:
1007 case R_390_PLT32:
1008 case R_390_PLT32DBL:
1009 case R_390_PLT64:
1010 case R_390_PLTOFF16:
1011 case R_390_PLTOFF32:
1012 case R_390_PLTOFF64:
1013 /* This symbol requires a procedure linkage table entry. We
1014 actually build the entry in adjust_dynamic_symbol,
1015 because this might be a case of linking PIC code which is
1016 never referenced by a dynamic object, in which case we
1017 don't need to generate a procedure linkage table entry
1018 after all. */
1019
1020 /* If this is a local symbol, we resolve it directly without
1021 creating a procedure linkage table entry. */
1022 if (h != NULL)
1023 {
1024 h->needs_plt = 1;
1025 h->plt.refcount += 1;
1026 }
1027 break;
1028
1029 case R_390_GOTPLT12:
1030 case R_390_GOTPLT16:
1031 case R_390_GOTPLT20:
1032 case R_390_GOTPLT32:
1033 case R_390_GOTPLT64:
1034 case R_390_GOTPLTENT:
1035 /* This symbol requires either a procedure linkage table entry
1036 or an entry in the local got. We actually build the entry
1037 in adjust_dynamic_symbol because whether this is really a
1038 global reference can change and with it the fact if we have
1039 to create a plt entry or a local got entry. To be able to
1040 make a once global symbol a local one we have to keep track
1041 of the number of gotplt references that exist for this
1042 symbol. */
1043 if (h != NULL)
1044 {
1045 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1046 h->needs_plt = 1;
1047 h->plt.refcount += 1;
1048 }
1049 else
1050 local_got_refcounts[r_symndx] += 1;
1051 break;
1052
1053 case R_390_TLS_LDM64:
1054 htab->tls_ldm_got.refcount += 1;
1055 break;
1056
1057 case R_390_TLS_IE64:
1058 case R_390_TLS_GOTIE12:
1059 case R_390_TLS_GOTIE20:
1060 case R_390_TLS_GOTIE64:
1061 case R_390_TLS_IEENT:
1062 if (bfd_link_pic (info))
1063 info->flags |= DF_STATIC_TLS;
1064 /* Fall through */
1065
1066 case R_390_GOT12:
1067 case R_390_GOT16:
1068 case R_390_GOT20:
1069 case R_390_GOT32:
1070 case R_390_GOT64:
1071 case R_390_GOTENT:
1072 case R_390_TLS_GD64:
1073 /* This symbol requires a global offset table entry. */
1074 switch (r_type)
1075 {
1076 default:
1077 case R_390_GOT12:
1078 case R_390_GOT16:
1079 case R_390_GOT20:
1080 case R_390_GOT32:
1081 case R_390_GOTENT:
1082 tls_type = GOT_NORMAL;
1083 break;
1084 case R_390_TLS_GD64:
1085 tls_type = GOT_TLS_GD;
1086 break;
1087 case R_390_TLS_IE64:
1088 case R_390_TLS_GOTIE64:
1089 tls_type = GOT_TLS_IE;
1090 break;
1091 case R_390_TLS_GOTIE12:
1092 case R_390_TLS_GOTIE20:
1093 case R_390_TLS_IEENT:
1094 tls_type = GOT_TLS_IE_NLT;
1095 break;
1096 }
1097
1098 if (h != NULL)
1099 {
1100 h->got.refcount += 1;
1101 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1102 }
1103 else
1104 {
1105 local_got_refcounts[r_symndx] += 1;
1106 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1107 }
1108 /* If a TLS symbol is accessed using IE at least once,
1109 there is no point to use dynamic model for it. */
1110 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1111 {
1112 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1113 {
1114 _bfd_error_handler
1115 /* xgettext:c-format */
1116 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1117 abfd, h->root.root.string);
1118 return FALSE;
1119 }
1120 if (old_tls_type > tls_type)
1121 tls_type = old_tls_type;
1122 }
1123
1124 if (old_tls_type != tls_type)
1125 {
1126 if (h != NULL)
1127 elf_s390_hash_entry (h)->tls_type = tls_type;
1128 else
1129 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1130 }
1131
1132 if (r_type != R_390_TLS_IE64)
1133 break;
1134 /* Fall through */
1135
1136 case R_390_TLS_LE64:
1137 /* For static linking and executables this reloc will be
1138 calculated at linktime otherwise a TLS_TPOFF runtime
1139 reloc will be generated. */
1140 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1141 break;
1142
1143 if (!bfd_link_pic (info))
1144 break;
1145 info->flags |= DF_STATIC_TLS;
1146 /* Fall through */
1147
1148 case R_390_8:
1149 case R_390_16:
1150 case R_390_32:
1151 case R_390_64:
1152 case R_390_PC12DBL:
1153 case R_390_PC16:
1154 case R_390_PC16DBL:
1155 case R_390_PC24DBL:
1156 case R_390_PC32:
1157 case R_390_PC32DBL:
1158 case R_390_PC64:
1159 if (h != NULL && bfd_link_executable (info))
1160 {
1161 /* If this reloc is in a read-only section, we might
1162 need a copy reloc. We can't check reliably at this
1163 stage whether the section is read-only, as input
1164 sections have not yet been mapped to output sections.
1165 Tentatively set the flag for now, and correct in
1166 adjust_dynamic_symbol. */
1167 h->non_got_ref = 1;
1168
1169 if (!bfd_link_pic (info))
1170 {
1171 /* We may need a .plt entry if the function this reloc
1172 refers to is in a shared lib. */
1173 h->plt.refcount += 1;
1174 }
1175 }
1176
1177 /* If we are creating a shared library, and this is a reloc
1178 against a global symbol, or a non PC relative reloc
1179 against a local symbol, then we need to copy the reloc
1180 into the shared library. However, if we are linking with
1181 -Bsymbolic, we do not need to copy a reloc against a
1182 global symbol which is defined in an object we are
1183 including in the link (i.e., DEF_REGULAR is set). At
1184 this point we have not seen all the input files, so it is
1185 possible that DEF_REGULAR is not set now but will be set
1186 later (it is never cleared). In case of a weak definition,
1187 DEF_REGULAR may be cleared later by a strong definition in
1188 a shared library. We account for that possibility below by
1189 storing information in the relocs_copied field of the hash
1190 table entry. A similar situation occurs when creating
1191 shared libraries and symbol visibility changes render the
1192 symbol local.
1193
1194 If on the other hand, we are creating an executable, we
1195 may need to keep relocations for symbols satisfied by a
1196 dynamic library if we manage to avoid copy relocs for the
1197 symbol. */
1198 if ((bfd_link_pic (info)
1199 && (sec->flags & SEC_ALLOC) != 0
1200 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1201 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1202 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1203 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1204 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1207 || (h != NULL
1208 && (! SYMBOLIC_BIND (info, h)
1209 || h->root.type == bfd_link_hash_defweak
1210 || !h->def_regular))))
1211 || (ELIMINATE_COPY_RELOCS
1212 && !bfd_link_pic (info)
1213 && (sec->flags & SEC_ALLOC) != 0
1214 && h != NULL
1215 && (h->root.type == bfd_link_hash_defweak
1216 || !h->def_regular)))
1217 {
1218 struct elf_dyn_relocs *p;
1219 struct elf_dyn_relocs **head;
1220
1221 /* We must copy these reloc types into the output file.
1222 Create a reloc section in dynobj and make room for
1223 this reloc. */
1224 if (sreloc == NULL)
1225 {
1226 if (htab->elf.dynobj == NULL)
1227 htab->elf.dynobj = abfd;
1228
1229 sreloc = _bfd_elf_make_dynamic_reloc_section
1230 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1231
1232 if (sreloc == NULL)
1233 return FALSE;
1234 }
1235
1236 /* If this is a global symbol, we count the number of
1237 relocations we need for this symbol. */
1238 if (h != NULL)
1239 {
1240 head = &h->dyn_relocs;
1241 }
1242 else
1243 {
1244 /* Track dynamic relocs needed for local syms too.
1245 We really need local syms available to do this
1246 easily. Oh well. */
1247 asection *s;
1248 void *vpp;
1249
1250 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1251 abfd, r_symndx);
1252 if (isym == NULL)
1253 return FALSE;
1254
1255 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1256 if (s == NULL)
1257 s = sec;
1258
1259 vpp = &elf_section_data (s)->local_dynrel;
1260 head = (struct elf_dyn_relocs **) vpp;
1261 }
1262
1263 p = *head;
1264 if (p == NULL || p->sec != sec)
1265 {
1266 size_t amt = sizeof *p;
1267 p = ((struct elf_dyn_relocs *)
1268 bfd_alloc (htab->elf.dynobj, amt));
1269 if (p == NULL)
1270 return FALSE;
1271 p->next = *head;
1272 *head = p;
1273 p->sec = sec;
1274 p->count = 0;
1275 p->pc_count = 0;
1276 }
1277
1278 p->count += 1;
1279 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1280 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1281 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1282 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1283 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1284 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1285 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1286 p->pc_count += 1;
1287 }
1288 break;
1289
1290 /* This relocation describes the C++ object vtable hierarchy.
1291 Reconstruct it for later use during GC. */
1292 case R_390_GNU_VTINHERIT:
1293 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1294 return FALSE;
1295 break;
1296
1297 /* This relocation describes which C++ vtable entries are actually
1298 used. Record for later use during GC. */
1299 case R_390_GNU_VTENTRY:
1300 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1301 return FALSE;
1302 break;
1303
1304 default:
1305 break;
1306 }
1307 }
1308
1309 return TRUE;
1310 }
1311
1312 /* Return the section that should be marked against GC for a given
1313 relocation. */
1314
1315 static asection *
1316 elf_s390_gc_mark_hook (asection *sec,
1317 struct bfd_link_info *info,
1318 Elf_Internal_Rela *rel,
1319 struct elf_link_hash_entry *h,
1320 Elf_Internal_Sym *sym)
1321 {
1322 if (h != NULL)
1323 switch (ELF64_R_TYPE (rel->r_info))
1324 {
1325 case R_390_GNU_VTINHERIT:
1326 case R_390_GNU_VTENTRY:
1327 return NULL;
1328 }
1329
1330 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1331 }
1332
1333 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1334 entry but we found we will not create any. Called when we find we will
1335 not have any PLT for this symbol, by for example
1336 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1337 or elf_s390_size_dynamic_sections if no dynamic sections will be
1338 created (we're only linking static objects). */
1339
1340 static void
1341 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1342 {
1343 if (h->elf.root.type == bfd_link_hash_warning)
1344 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1345
1346 if (h->gotplt_refcount <= 0)
1347 return;
1348
1349 /* We simply add the number of gotplt references to the number
1350 * of got references for this symbol. */
1351 h->elf.got.refcount += h->gotplt_refcount;
1352 h->gotplt_refcount = -1;
1353 }
1354
1355 /* Find dynamic relocs for H that apply to read-only sections. */
1356
1357 static asection *
1358 readonly_dynrelocs (struct elf_link_hash_entry *h)
1359 {
1360 struct elf_dyn_relocs *p;
1361
1362 for (p = h->dyn_relocs; p != NULL; p = p->next)
1363 {
1364 asection *s = p->sec->output_section;
1365
1366 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1367 return p->sec;
1368 }
1369 return NULL;
1370 }
1371
1372 /* Adjust a symbol defined by a dynamic object and referenced by a
1373 regular object. The current definition is in some section of the
1374 dynamic object, but we're not including those sections. We have to
1375 change the definition to something the rest of the link can
1376 understand. */
1377
1378 static bfd_boolean
1379 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1380 struct elf_link_hash_entry *h)
1381 {
1382 struct elf_s390_link_hash_table *htab;
1383 asection *s, *srel;
1384
1385 /* STT_GNU_IFUNC symbol must go through PLT. */
1386 if (s390_is_ifunc_symbol_p (h))
1387 {
1388 /* All local STT_GNU_IFUNC references must be treated as local
1389 calls via local PLT. */
1390 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1391 {
1392 bfd_size_type pc_count = 0, count = 0;
1393 struct elf_dyn_relocs **pp;
1394 struct elf_dyn_relocs *p;
1395
1396 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1397 {
1398 pc_count += p->pc_count;
1399 p->count -= p->pc_count;
1400 p->pc_count = 0;
1401 count += p->count;
1402 if (p->count == 0)
1403 *pp = p->next;
1404 else
1405 pp = &p->next;
1406 }
1407
1408 if (pc_count || count)
1409 {
1410 h->needs_plt = 1;
1411 h->non_got_ref = 1;
1412 if (h->plt.refcount <= 0)
1413 h->plt.refcount = 1;
1414 else
1415 h->plt.refcount += 1;
1416 }
1417 }
1418
1419 if (h->plt.refcount <= 0)
1420 {
1421 h->plt.offset = (bfd_vma) -1;
1422 h->needs_plt = 0;
1423 }
1424 return TRUE;
1425 }
1426
1427 /* If this is a function, put it in the procedure linkage table. We
1428 will fill in the contents of the procedure linkage table later
1429 (although we could actually do it here). */
1430 if (h->type == STT_FUNC
1431 || h->needs_plt)
1432 {
1433 if (h->plt.refcount <= 0
1434 || SYMBOL_CALLS_LOCAL (info, h)
1435 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1436 {
1437 /* This case can occur if we saw a PLT32 reloc in an input
1438 file, but the symbol was never referred to by a dynamic
1439 object, or if all references were garbage collected. In
1440 such a case, we don't actually need to build a procedure
1441 linkage table, and we can just do a PC32 reloc instead. */
1442 h->plt.offset = (bfd_vma) -1;
1443 h->needs_plt = 0;
1444 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1445 }
1446
1447 return TRUE;
1448 }
1449 else
1450 /* It's possible that we incorrectly decided a .plt reloc was
1451 needed for an R_390_PC32 reloc to a non-function sym in
1452 check_relocs. We can't decide accurately between function and
1453 non-function syms in check-relocs; Objects loaded later in
1454 the link may change h->type. So fix it now. */
1455 h->plt.offset = (bfd_vma) -1;
1456
1457 /* If this is a weak symbol, and there is a real definition, the
1458 processor independent code will have arranged for us to see the
1459 real definition first, and we can just use the same value. */
1460 if (h->is_weakalias)
1461 {
1462 struct elf_link_hash_entry *def = weakdef (h);
1463 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1464 h->root.u.def.section = def->root.u.def.section;
1465 h->root.u.def.value = def->root.u.def.value;
1466 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1467 h->non_got_ref = def->non_got_ref;
1468 return TRUE;
1469 }
1470
1471 /* This is a reference to a symbol defined by a dynamic object which
1472 is not a function. */
1473
1474 /* If we are creating a shared library, we must presume that the
1475 only references to the symbol are via the global offset table.
1476 For such cases we need not do anything here; the relocations will
1477 be handled correctly by relocate_section. */
1478 if (bfd_link_pic (info))
1479 return TRUE;
1480
1481 /* If there are no references to this symbol that do not use the
1482 GOT, we don't need to generate a copy reloc. */
1483 if (!h->non_got_ref)
1484 return TRUE;
1485
1486 /* If -z nocopyreloc was given, we won't generate them either. */
1487 if (info->nocopyreloc)
1488 {
1489 h->non_got_ref = 0;
1490 return TRUE;
1491 }
1492
1493 /* If we don't find any dynamic relocs in read-only sections, then
1494 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1495 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1496 {
1497 h->non_got_ref = 0;
1498 return TRUE;
1499 }
1500
1501 /* We must allocate the symbol in our .dynbss section, which will
1502 become part of the .bss section of the executable. There will be
1503 an entry for this symbol in the .dynsym section. The dynamic
1504 object will contain position independent code, so all references
1505 from the dynamic object to this symbol will go through the global
1506 offset table. The dynamic linker will use the .dynsym entry to
1507 determine the address it must put in the global offset table, so
1508 both the dynamic object and the regular object will refer to the
1509 same memory location for the variable. */
1510
1511 htab = elf_s390_hash_table (info);
1512 if (htab == NULL)
1513 return FALSE;
1514
1515 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1516 copy the initial value out of the dynamic object and into the
1517 runtime process image. */
1518 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1519 {
1520 s = htab->elf.sdynrelro;
1521 srel = htab->elf.sreldynrelro;
1522 }
1523 else
1524 {
1525 s = htab->elf.sdynbss;
1526 srel = htab->elf.srelbss;
1527 }
1528 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1529 {
1530 srel->size += sizeof (Elf64_External_Rela);
1531 h->needs_copy = 1;
1532 }
1533
1534 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1535 }
1536
1537 /* Allocate space in .plt, .got and associated reloc sections for
1538 dynamic relocs. */
1539
1540 static bfd_boolean
1541 allocate_dynrelocs (struct elf_link_hash_entry *h,
1542 void * inf)
1543 {
1544 struct bfd_link_info *info;
1545 struct elf_s390_link_hash_table *htab;
1546 struct elf_dyn_relocs *p;
1547
1548 if (h->root.type == bfd_link_hash_indirect)
1549 return TRUE;
1550
1551 info = (struct bfd_link_info *) inf;
1552 htab = elf_s390_hash_table (info);
1553 if (htab == NULL)
1554 return FALSE;
1555
1556 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1557 here if it is defined and referenced in a non-shared object. */
1558 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1559 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1560 else if (htab->elf.dynamic_sections_created
1561 && h->plt.refcount > 0)
1562 {
1563 /* Make sure this symbol is output as a dynamic symbol.
1564 Undefined weak syms won't yet be marked as dynamic. */
1565 if (h->dynindx == -1
1566 && !h->forced_local)
1567 {
1568 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1569 return FALSE;
1570 }
1571
1572 if (bfd_link_pic (info)
1573 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1574 {
1575 asection *s = htab->elf.splt;
1576
1577 /* If this is the first .plt entry, make room for the special
1578 first entry. */
1579 if (s->size == 0)
1580 s->size += PLT_FIRST_ENTRY_SIZE;
1581
1582 h->plt.offset = s->size;
1583
1584 /* If this symbol is not defined in a regular file, and we are
1585 not generating a shared library, then set the symbol to this
1586 location in the .plt. This is required to make function
1587 pointers compare as equal between the normal executable and
1588 the shared library. */
1589 if (! bfd_link_pic (info)
1590 && !h->def_regular)
1591 {
1592 h->root.u.def.section = s;
1593 h->root.u.def.value = h->plt.offset;
1594 }
1595
1596 /* Make room for this entry. */
1597 s->size += PLT_ENTRY_SIZE;
1598
1599 /* We also need to make an entry in the .got.plt section. */
1600 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1601
1602 /* We also need to make an entry in the .rela.plt section. */
1603 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1604 }
1605 else
1606 {
1607 h->plt.offset = (bfd_vma) -1;
1608 h->needs_plt = 0;
1609 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1610 }
1611 }
1612 else
1613 {
1614 h->plt.offset = (bfd_vma) -1;
1615 h->needs_plt = 0;
1616 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1617 }
1618
1619 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1620 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1621 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1622 we can save the dynamic TLS relocation. */
1623 if (h->got.refcount > 0
1624 && !bfd_link_pic (info)
1625 && h->dynindx == -1
1626 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1627 {
1628 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1629 /* For the GOTIE access without a literal pool entry the offset has
1630 to be stored somewhere. The immediate value in the instruction
1631 is not bit enough so the value is stored in the got. */
1632 {
1633 h->got.offset = htab->elf.sgot->size;
1634 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1635 }
1636 else
1637 h->got.offset = (bfd_vma) -1;
1638 }
1639 else if (h->got.refcount > 0)
1640 {
1641 asection *s;
1642 bfd_boolean dyn;
1643 int tls_type = elf_s390_hash_entry(h)->tls_type;
1644
1645 /* Make sure this symbol is output as a dynamic symbol.
1646 Undefined weak syms won't yet be marked as dynamic. */
1647 if (h->dynindx == -1
1648 && !h->forced_local)
1649 {
1650 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1651 return FALSE;
1652 }
1653
1654 s = htab->elf.sgot;
1655 h->got.offset = s->size;
1656 s->size += GOT_ENTRY_SIZE;
1657 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1658 if (tls_type == GOT_TLS_GD)
1659 s->size += GOT_ENTRY_SIZE;
1660 dyn = htab->elf.dynamic_sections_created;
1661 /* R_390_TLS_IE64 needs one dynamic relocation,
1662 R_390_TLS_GD64 needs one if local symbol and two if global. */
1663 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1664 || tls_type >= GOT_TLS_IE)
1665 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1666 else if (tls_type == GOT_TLS_GD)
1667 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1668 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1669 && (bfd_link_pic (info)
1670 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1671 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1672 }
1673 else
1674 h->got.offset = (bfd_vma) -1;
1675
1676 if (h->dyn_relocs == NULL)
1677 return TRUE;
1678
1679 /* In the shared -Bsymbolic case, discard space allocated for
1680 dynamic pc-relative relocs against symbols which turn out to be
1681 defined in regular objects. For the normal shared case, discard
1682 space for pc-relative relocs that have become local due to symbol
1683 visibility changes. */
1684
1685 if (bfd_link_pic (info))
1686 {
1687 if (SYMBOL_CALLS_LOCAL (info, h))
1688 {
1689 struct elf_dyn_relocs **pp;
1690
1691 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1692 {
1693 p->count -= p->pc_count;
1694 p->pc_count = 0;
1695 if (p->count == 0)
1696 *pp = p->next;
1697 else
1698 pp = &p->next;
1699 }
1700 }
1701
1702 /* Also discard relocs on undefined weak syms with non-default
1703 visibility. */
1704 if (h->dyn_relocs != NULL
1705 && h->root.type == bfd_link_hash_undefweak)
1706 {
1707 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1708 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1709 h->dyn_relocs = NULL;
1710
1711 /* Make sure undefined weak symbols are output as a dynamic
1712 symbol in PIEs. */
1713 else if (h->dynindx == -1
1714 && !h->forced_local)
1715 {
1716 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1717 return FALSE;
1718 }
1719 }
1720 }
1721 else if (ELIMINATE_COPY_RELOCS)
1722 {
1723 /* For the non-shared case, discard space for relocs against
1724 symbols which turn out to need copy relocs or are not
1725 dynamic. */
1726
1727 if (!h->non_got_ref
1728 && ((h->def_dynamic
1729 && !h->def_regular)
1730 || (htab->elf.dynamic_sections_created
1731 && (h->root.type == bfd_link_hash_undefweak
1732 || h->root.type == bfd_link_hash_undefined))))
1733 {
1734 /* Make sure this symbol is output as a dynamic symbol.
1735 Undefined weak syms won't yet be marked as dynamic. */
1736 if (h->dynindx == -1
1737 && !h->forced_local)
1738 {
1739 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1740 return FALSE;
1741 }
1742
1743 /* If that succeeded, we know we'll be keeping all the
1744 relocs. */
1745 if (h->dynindx != -1)
1746 goto keep;
1747 }
1748
1749 h->dyn_relocs = NULL;
1750
1751 keep: ;
1752 }
1753
1754 /* Finally, allocate space. */
1755 for (p = h->dyn_relocs; p != NULL; p = p->next)
1756 {
1757 asection *sreloc = elf_section_data (p->sec)->sreloc;
1758 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1759 }
1760
1761 return TRUE;
1762 }
1763
1764 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1765 read-only sections. */
1766
1767 static bfd_boolean
1768 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1769 {
1770 asection *sec;
1771
1772 if (h->root.type == bfd_link_hash_indirect)
1773 return TRUE;
1774
1775 sec = readonly_dynrelocs (h);
1776 if (sec != NULL)
1777 {
1778 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1779
1780 info->flags |= DF_TEXTREL;
1781 info->callbacks->minfo
1782 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1783 sec->owner, h->root.root.string, sec);
1784
1785 /* Not an error, just cut short the traversal. */
1786 return FALSE;
1787 }
1788 return TRUE;
1789 }
1790
1791 /* Set the sizes of the dynamic sections. */
1792
1793 static bfd_boolean
1794 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1795 struct bfd_link_info *info)
1796 {
1797 struct elf_s390_link_hash_table *htab;
1798 bfd *dynobj;
1799 asection *s;
1800 bfd_boolean relocs;
1801 bfd *ibfd;
1802
1803 htab = elf_s390_hash_table (info);
1804 if (htab == NULL)
1805 return FALSE;
1806
1807 dynobj = htab->elf.dynobj;
1808 if (dynobj == NULL)
1809 abort ();
1810
1811 if (htab->elf.dynamic_sections_created)
1812 {
1813 /* Set the contents of the .interp section to the interpreter. */
1814 if (bfd_link_executable (info) && !info->nointerp)
1815 {
1816 s = bfd_get_linker_section (dynobj, ".interp");
1817 if (s == NULL)
1818 abort ();
1819 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1820 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1821 }
1822 }
1823
1824 if (htab->elf.sgot && s390_gotplt_after_got_p (info))
1825 {
1826 /* _bfd_elf_create_got_section adds the got header size always
1827 to .got.plt but we need it in .got if this section comes
1828 first. */
1829 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
1830 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
1831
1832 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1833 instead of .got.plt. */
1834 htab->elf.hgot->root.u.def.section = htab->elf.sgot;
1835 htab->elf.hgot->root.u.def.value = 0;
1836 }
1837
1838 /* Set up .got offsets for local syms, and space for local dynamic
1839 relocs. */
1840 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1841 {
1842 bfd_signed_vma *local_got;
1843 bfd_signed_vma *end_local_got;
1844 char *local_tls_type;
1845 bfd_size_type locsymcount;
1846 Elf_Internal_Shdr *symtab_hdr;
1847 asection *srela;
1848 struct plt_entry *local_plt;
1849 unsigned int i;
1850
1851 if (! is_s390_elf (ibfd))
1852 continue;
1853
1854 for (s = ibfd->sections; s != NULL; s = s->next)
1855 {
1856 struct elf_dyn_relocs *p;
1857
1858 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1859 {
1860 if (!bfd_is_abs_section (p->sec)
1861 && bfd_is_abs_section (p->sec->output_section))
1862 {
1863 /* Input section has been discarded, either because
1864 it is a copy of a linkonce section or due to
1865 linker script /DISCARD/, so we'll be discarding
1866 the relocs too. */
1867 }
1868 else if (p->count != 0)
1869 {
1870 srela = elf_section_data (p->sec)->sreloc;
1871 srela->size += p->count * sizeof (Elf64_External_Rela);
1872 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1873 info->flags |= DF_TEXTREL;
1874 }
1875 }
1876 }
1877
1878 local_got = elf_local_got_refcounts (ibfd);
1879 if (!local_got)
1880 continue;
1881
1882 symtab_hdr = &elf_symtab_hdr (ibfd);
1883 locsymcount = symtab_hdr->sh_info;
1884 end_local_got = local_got + locsymcount;
1885 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1886 s = htab->elf.sgot;
1887 srela = htab->elf.srelgot;
1888 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1889 {
1890 if (*local_got > 0)
1891 {
1892 *local_got = s->size;
1893 s->size += GOT_ENTRY_SIZE;
1894 if (*local_tls_type == GOT_TLS_GD)
1895 s->size += GOT_ENTRY_SIZE;
1896 if (bfd_link_pic (info))
1897 srela->size += sizeof (Elf64_External_Rela);
1898 }
1899 else
1900 *local_got = (bfd_vma) -1;
1901 }
1902
1903 local_plt = elf_s390_local_plt (ibfd);
1904 for (i = 0; i < symtab_hdr->sh_info; i++)
1905 {
1906 if (local_plt[i].plt.refcount > 0)
1907 {
1908 local_plt[i].plt.offset = htab->elf.iplt->size;
1909 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1910 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1911 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1912 }
1913 else
1914 local_plt[i].plt.offset = (bfd_vma) -1;
1915 }
1916 }
1917
1918 if (htab->tls_ldm_got.refcount > 0)
1919 {
1920 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1921 relocs. */
1922 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1923 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1924 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1925 }
1926 else
1927 htab->tls_ldm_got.offset = -1;
1928
1929 /* Allocate global sym .plt and .got entries, and space for global
1930 sym dynamic relocs. */
1931 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1932
1933 /* We now have determined the sizes of the various dynamic sections.
1934 Allocate memory for them. */
1935 relocs = FALSE;
1936 for (s = dynobj->sections; s != NULL; s = s->next)
1937 {
1938 if ((s->flags & SEC_LINKER_CREATED) == 0)
1939 continue;
1940
1941 if (s == htab->elf.splt
1942 || s == htab->elf.sgot
1943 || s == htab->elf.sgotplt
1944 || s == htab->elf.sdynbss
1945 || s == htab->elf.sdynrelro
1946 || s == htab->elf.iplt
1947 || s == htab->elf.igotplt
1948 || s == htab->irelifunc)
1949 {
1950 /* Strip this section if we don't need it; see the
1951 comment below. */
1952 }
1953 else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
1954 {
1955 if (s->size != 0 && s != htab->elf.srelplt)
1956 relocs = TRUE;
1957
1958 /* We use the reloc_count field as a counter if we need
1959 to copy relocs into the output file. */
1960 s->reloc_count = 0;
1961 }
1962 else
1963 {
1964 /* It's not one of our sections, so don't allocate space. */
1965 continue;
1966 }
1967
1968 if (s->size == 0)
1969 {
1970 /* If we don't need this section, strip it from the
1971 output file. This is to handle .rela.bss and
1972 .rela.plt. We must create it in
1973 create_dynamic_sections, because it must be created
1974 before the linker maps input sections to output
1975 sections. The linker does that before
1976 adjust_dynamic_symbol is called, and it is that
1977 function which decides whether anything needs to go
1978 into these sections. */
1979
1980 s->flags |= SEC_EXCLUDE;
1981 continue;
1982 }
1983
1984 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1985 continue;
1986
1987 /* Allocate memory for the section contents. We use bfd_zalloc
1988 here in case unused entries are not reclaimed before the
1989 section's contents are written out. This should not happen,
1990 but this way if it does, we get a R_390_NONE reloc instead
1991 of garbage. */
1992 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1993 if (s->contents == NULL)
1994 return FALSE;
1995 }
1996
1997 if (htab->elf.dynamic_sections_created)
1998 {
1999 /* Add some entries to the .dynamic section. We fill in the
2000 values later, in elf_s390_finish_dynamic_sections, but we
2001 must add the entries now so that we get the correct size for
2002 the .dynamic section. The DT_DEBUG entry is filled in by the
2003 dynamic linker and used by the debugger. */
2004 #define add_dynamic_entry(TAG, VAL) \
2005 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2006
2007 if (bfd_link_executable (info))
2008 {
2009 if (!add_dynamic_entry (DT_DEBUG, 0))
2010 return FALSE;
2011 }
2012
2013 if (htab->elf.splt->size != 0)
2014 {
2015 if (!add_dynamic_entry (DT_PLTGOT, 0)
2016 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2017 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2018 || !add_dynamic_entry (DT_JMPREL, 0))
2019 return FALSE;
2020 }
2021
2022 if (relocs)
2023 {
2024 if (!add_dynamic_entry (DT_RELA, 0)
2025 || !add_dynamic_entry (DT_RELASZ, 0)
2026 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2027 return FALSE;
2028
2029 /* If any dynamic relocs apply to a read-only section,
2030 then we need a DT_TEXTREL entry. */
2031 if ((info->flags & DF_TEXTREL) == 0)
2032 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2033
2034 if ((info->flags & DF_TEXTREL) != 0)
2035 {
2036 if (!add_dynamic_entry (DT_TEXTREL, 0))
2037 return FALSE;
2038 }
2039 }
2040 }
2041 #undef add_dynamic_entry
2042
2043 return TRUE;
2044 }
2045
2046 /* Return the base VMA address which should be subtracted from real addresses
2047 when resolving @dtpoff relocation.
2048 This is PT_TLS segment p_vaddr. */
2049
2050 static bfd_vma
2051 dtpoff_base (struct bfd_link_info *info)
2052 {
2053 /* If tls_sec is NULL, we should have signalled an error already. */
2054 if (elf_hash_table (info)->tls_sec == NULL)
2055 return 0;
2056 return elf_hash_table (info)->tls_sec->vma;
2057 }
2058
2059 /* Return the relocation value for @tpoff relocation
2060 if STT_TLS virtual address is ADDRESS. */
2061
2062 static bfd_vma
2063 tpoff (struct bfd_link_info *info, bfd_vma address)
2064 {
2065 struct elf_link_hash_table *htab = elf_hash_table (info);
2066
2067 /* If tls_sec is NULL, we should have signalled an error already. */
2068 if (htab->tls_sec == NULL)
2069 return 0;
2070 return htab->tls_size + htab->tls_sec->vma - address;
2071 }
2072
2073 /* Complain if TLS instruction relocation is against an invalid
2074 instruction. */
2075
2076 static void
2077 invalid_tls_insn (bfd *input_bfd,
2078 asection *input_section,
2079 Elf_Internal_Rela *rel)
2080 {
2081 reloc_howto_type *howto;
2082
2083 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2084 _bfd_error_handler
2085 /* xgettext:c-format */
2086 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2087 input_bfd,
2088 input_section,
2089 (uint64_t) rel->r_offset,
2090 howto->name);
2091 bfd_set_error (bfd_error_bad_value);
2092 }
2093
2094 /* Relocate a 390 ELF section. */
2095
2096 static bfd_boolean
2097 elf_s390_relocate_section (bfd *output_bfd,
2098 struct bfd_link_info *info,
2099 bfd *input_bfd,
2100 asection *input_section,
2101 bfd_byte *contents,
2102 Elf_Internal_Rela *relocs,
2103 Elf_Internal_Sym *local_syms,
2104 asection **local_sections)
2105 {
2106 struct elf_s390_link_hash_table *htab;
2107 Elf_Internal_Shdr *symtab_hdr;
2108 struct elf_link_hash_entry **sym_hashes;
2109 bfd_vma *local_got_offsets;
2110 Elf_Internal_Rela *rel;
2111 Elf_Internal_Rela *relend;
2112
2113 if (!is_s390_elf (input_bfd))
2114 {
2115 bfd_set_error (bfd_error_wrong_format);
2116 return FALSE;
2117 }
2118
2119 htab = elf_s390_hash_table (info);
2120 if (htab == NULL)
2121 return FALSE;
2122
2123 symtab_hdr = &elf_symtab_hdr (input_bfd);
2124 sym_hashes = elf_sym_hashes (input_bfd);
2125 local_got_offsets = elf_local_got_offsets (input_bfd);
2126
2127 rel = relocs;
2128 relend = relocs + input_section->reloc_count;
2129 for (; rel < relend; rel++)
2130 {
2131 unsigned int r_type;
2132 reloc_howto_type *howto;
2133 unsigned long r_symndx;
2134 struct elf_link_hash_entry *h;
2135 Elf_Internal_Sym *sym;
2136 asection *sec;
2137 bfd_vma off;
2138 bfd_vma relocation;
2139 bfd_boolean unresolved_reloc;
2140 bfd_reloc_status_type r;
2141 int tls_type;
2142 bfd_boolean resolved_to_zero;
2143
2144 r_type = ELF64_R_TYPE (rel->r_info);
2145 if (r_type == (int) R_390_GNU_VTINHERIT
2146 || r_type == (int) R_390_GNU_VTENTRY)
2147 continue;
2148 if (r_type >= (int) R_390_max)
2149 {
2150 bfd_set_error (bfd_error_bad_value);
2151 return FALSE;
2152 }
2153
2154 howto = elf_howto_table + r_type;
2155 r_symndx = ELF64_R_SYM (rel->r_info);
2156
2157 h = NULL;
2158 sym = NULL;
2159 sec = NULL;
2160 unresolved_reloc = FALSE;
2161 if (r_symndx < symtab_hdr->sh_info)
2162 {
2163 sym = local_syms + r_symndx;
2164 sec = local_sections[r_symndx];
2165
2166 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2167 {
2168 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2169 if (local_plt == NULL)
2170 return FALSE;
2171
2172 /* Address of the PLT slot. */
2173 relocation = (htab->elf.iplt->output_section->vma
2174 + htab->elf.iplt->output_offset
2175 + local_plt[r_symndx].plt.offset);
2176
2177 switch (r_type)
2178 {
2179 case R_390_PLTOFF16:
2180 case R_390_PLTOFF32:
2181 case R_390_PLTOFF64:
2182 relocation -= s390_got_pointer (info);
2183 break;
2184 case R_390_GOTPLT12:
2185 case R_390_GOTPLT16:
2186 case R_390_GOTPLT20:
2187 case R_390_GOTPLT32:
2188 case R_390_GOTPLT64:
2189 case R_390_GOTPLTENT:
2190 case R_390_GOT12:
2191 case R_390_GOT16:
2192 case R_390_GOT20:
2193 case R_390_GOT32:
2194 case R_390_GOT64:
2195 case R_390_GOTENT:
2196 {
2197 /* Write the PLT slot address into the GOT slot. */
2198 bfd_put_64 (output_bfd, relocation,
2199 htab->elf.sgot->contents +
2200 local_got_offsets[r_symndx]);
2201 relocation = (local_got_offsets[r_symndx] +
2202 s390_got_offset (info));
2203
2204 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2205 relocation += s390_got_pointer (info);
2206 break;
2207 }
2208 default:
2209 break;
2210 }
2211 /* The output section is needed later in
2212 finish_dynamic_section when creating the dynamic
2213 relocation. */
2214 local_plt[r_symndx].sec = sec;
2215 goto do_relocation;
2216 }
2217 else
2218 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2219 }
2220 else
2221 {
2222 bfd_boolean warned ATTRIBUTE_UNUSED;
2223 bfd_boolean ignored ATTRIBUTE_UNUSED;
2224
2225 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2226 r_symndx, symtab_hdr, sym_hashes,
2227 h, sec, relocation,
2228 unresolved_reloc, warned, ignored);
2229 }
2230
2231 if (sec != NULL && discarded_section (sec))
2232 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2233 rel, 1, relend, howto, 0, contents);
2234
2235 if (bfd_link_relocatable (info))
2236 continue;
2237
2238 resolved_to_zero = (h != NULL
2239 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2240
2241 switch (r_type)
2242 {
2243 case R_390_GOTPLT12:
2244 case R_390_GOTPLT16:
2245 case R_390_GOTPLT20:
2246 case R_390_GOTPLT32:
2247 case R_390_GOTPLT64:
2248 case R_390_GOTPLTENT:
2249 /* There are three cases for a GOTPLT relocation. 1) The
2250 relocation is against the jump slot entry of a plt that
2251 will get emitted to the output file. 2) The relocation
2252 is against the jump slot of a plt entry that has been
2253 removed. elf_s390_adjust_gotplt has created a GOT entry
2254 as replacement. 3) The relocation is against a local symbol.
2255 Cases 2) and 3) are the same as the GOT relocation code
2256 so we just have to test for case 1 and fall through for
2257 the other two. */
2258 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2259 {
2260 bfd_vma plt_index;
2261
2262 if (s390_is_ifunc_symbol_p (h))
2263 {
2264 /* Entry indices of .iplt and .igot.plt match
2265 1:1. No magic PLT first entry here. */
2266 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2267 relocation = (plt_index * GOT_ENTRY_SIZE
2268 + s390_gotplt_offset (info)
2269 + htab->elf.igotplt->output_offset);
2270 }
2271 else
2272 {
2273 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
2274 / PLT_ENTRY_SIZE);
2275
2276 relocation = (plt_index * GOT_ENTRY_SIZE
2277 + s390_gotplt_offset (info));
2278 }
2279 if (r_type == R_390_GOTPLTENT)
2280 relocation += s390_got_pointer (info);
2281 unresolved_reloc = FALSE;
2282 break;
2283 }
2284 /* Fall through. */
2285
2286 case R_390_GOT12:
2287 case R_390_GOT16:
2288 case R_390_GOT20:
2289 case R_390_GOT32:
2290 case R_390_GOT64:
2291 case R_390_GOTENT:
2292 /* Relocation is to the entry for this symbol in the global
2293 offset table. */
2294 if (htab->elf.sgot == NULL)
2295 abort ();
2296
2297 if (h != NULL)
2298 {
2299 bfd_boolean dyn;
2300
2301 off = h->got.offset;
2302 dyn = htab->elf.dynamic_sections_created;
2303
2304 if (s390_is_ifunc_symbol_p (h))
2305 {
2306 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2307 if (off == (bfd_vma)-1)
2308 {
2309 /* No explicit GOT usage so redirect to the
2310 got.iplt slot. */
2311 relocation = (s390_gotplt_offset (info)
2312 + htab->elf.igotplt->output_offset
2313 + (h->plt.offset / PLT_ENTRY_SIZE
2314 * GOT_ENTRY_SIZE));
2315
2316 /* For @GOTENT the relocation is against the offset between
2317 the instruction and the symbols entry in the GOT and not
2318 between the start of the GOT and the symbols entry. We
2319 add the vma of the GOT to get the correct value. */
2320 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2321 relocation += s390_got_pointer (info);
2322
2323 break;
2324 }
2325 else
2326 {
2327 /* Explicit GOT slots must contain the address
2328 of the PLT slot. This will be handled in
2329 finish_dynamic_symbol. */
2330 }
2331 }
2332 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2333 bfd_link_pic (info),
2334 h)
2335 || (bfd_link_pic (info)
2336 && SYMBOL_REFERENCES_LOCAL (info, h))
2337 || resolved_to_zero)
2338 {
2339 Elf_Internal_Sym *isym;
2340 asection *sym_sec;
2341
2342 /* This is actually a static link, or it is a
2343 -Bsymbolic link and the symbol is defined
2344 locally, or the symbol was forced to be local
2345 because of a version file. We must initialize
2346 this entry in the global offset table. Since the
2347 offset must always be a multiple of 2, we use the
2348 least significant bit to record whether we have
2349 initialized it already.
2350
2351 When doing a dynamic link, we create a .rel.got
2352 relocation entry to initialize the value. This
2353 is done in the finish_dynamic_symbol routine. */
2354 if ((off & 1) != 0)
2355 off &= ~1;
2356 else
2357 {
2358 bfd_put_64 (output_bfd, relocation,
2359 htab->elf.sgot->contents + off);
2360 h->got.offset |= 1;
2361 }
2362
2363 /* When turning a GOT slot dereference into a direct
2364 reference using larl we have to make sure that
2365 the symbol is 1. properly aligned and 2. it is no
2366 ABS symbol or will become one. */
2367 if ((h->def_regular
2368 && bfd_link_pic (info)
2369 && SYMBOL_REFERENCES_LOCAL (info, h))
2370 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2371 && ((r_type == R_390_GOTENT
2372 && (bfd_get_16 (input_bfd,
2373 contents + rel->r_offset - 2)
2374 & 0xff0f) == 0xc408)
2375 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2376 || (r_type == R_390_GOT20
2377 && (bfd_get_32 (input_bfd,
2378 contents + rel->r_offset - 2)
2379 & 0xff00f000) == 0xe300c000
2380 && bfd_get_8 (input_bfd,
2381 contents + rel->r_offset + 3) == 0x04))
2382 && (isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2383 input_bfd, r_symndx))
2384 && isym->st_shndx != SHN_ABS
2385 && h != htab->elf.hdynamic
2386 && h != htab->elf.hgot
2387 && h != htab->elf.hplt
2388 && !(isym->st_value & 1)
2389 && (sym_sec = bfd_section_from_elf_index (input_bfd,
2390 isym->st_shndx))
2391 && sym_sec->alignment_power)
2392 {
2393 unsigned short new_insn =
2394 (0xc000 | (bfd_get_8 (input_bfd,
2395 contents + rel->r_offset - 1) & 0xf0));
2396 bfd_put_16 (output_bfd, new_insn,
2397 contents + rel->r_offset - 2);
2398 r_type = R_390_PC32DBL;
2399 rel->r_addend = 2;
2400 howto = elf_howto_table + r_type;
2401 relocation = h->root.u.def.value
2402 + h->root.u.def.section->output_section->vma
2403 + h->root.u.def.section->output_offset;
2404 goto do_relocation;
2405 }
2406 }
2407 else
2408 unresolved_reloc = FALSE;
2409 }
2410 else
2411 {
2412 if (local_got_offsets == NULL)
2413 abort ();
2414
2415 off = local_got_offsets[r_symndx];
2416
2417 /* The offset must always be a multiple of 8. We use
2418 the least significant bit to record whether we have
2419 already generated the necessary reloc. */
2420 if ((off & 1) != 0)
2421 off &= ~1;
2422 else
2423 {
2424 bfd_put_64 (output_bfd, relocation,
2425 htab->elf.sgot->contents + off);
2426
2427 if (bfd_link_pic (info))
2428 {
2429 asection *s;
2430 Elf_Internal_Rela outrel;
2431 bfd_byte *loc;
2432
2433 s = htab->elf.srelgot;
2434 if (s == NULL)
2435 abort ();
2436
2437 outrel.r_offset = (htab->elf.sgot->output_section->vma
2438 + htab->elf.sgot->output_offset
2439 + off);
2440 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2441 outrel.r_addend = relocation;
2442 loc = s->contents;
2443 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2444 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2445 }
2446
2447 local_got_offsets[r_symndx] |= 1;
2448 }
2449 }
2450
2451 if (off >= (bfd_vma) -2)
2452 abort ();
2453
2454 relocation = s390_got_offset (info) + off;
2455
2456 /* For @GOTENT the relocation is against the offset between
2457 the instruction and the symbols entry in the GOT and not
2458 between the start of the GOT and the symbols entry. We
2459 add the vma of the GOT to get the correct value. */
2460 if ( r_type == R_390_GOTENT
2461 || r_type == R_390_GOTPLTENT)
2462 relocation += s390_got_pointer (info);
2463
2464 break;
2465
2466 case R_390_GOTOFF16:
2467 case R_390_GOTOFF32:
2468 case R_390_GOTOFF64:
2469 /* Relocation is relative to the start of the global offset
2470 table. */
2471
2472 if (h != NULL
2473 && s390_is_ifunc_symbol_p (h)
2474 && h->def_regular
2475 && !bfd_link_executable (info))
2476 {
2477 relocation = (htab->elf.iplt->output_section->vma
2478 + htab->elf.iplt->output_offset
2479 + h->plt.offset
2480 - s390_got_pointer (info));
2481 goto do_relocation;
2482 }
2483
2484 relocation -= s390_got_pointer (info);
2485 break;
2486
2487 case R_390_GOTPC:
2488 case R_390_GOTPCDBL:
2489 /* Use global offset table as symbol value. */
2490 relocation = s390_got_pointer (info);
2491 unresolved_reloc = FALSE;
2492 break;
2493
2494 case R_390_PLT12DBL:
2495 case R_390_PLT16DBL:
2496 case R_390_PLT24DBL:
2497 case R_390_PLT32:
2498 case R_390_PLT32DBL:
2499 case R_390_PLT64:
2500 /* Relocation is to the entry for this symbol in the
2501 procedure linkage table. */
2502
2503 /* Resolve a PLT32 reloc against a local symbol directly,
2504 without using the procedure linkage table. */
2505 if (h == NULL)
2506 break;
2507
2508 if (h->plt.offset == (bfd_vma) -1
2509 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2510 {
2511 /* We didn't make a PLT entry for this symbol. This
2512 happens when statically linking PIC code, or when
2513 using -Bsymbolic. */
2514 break;
2515 }
2516 if (s390_is_ifunc_symbol_p (h))
2517 relocation = (htab->elf.iplt->output_section->vma
2518 + htab->elf.iplt->output_offset
2519 + h->plt.offset);
2520 else
2521 relocation = (htab->elf.splt->output_section->vma
2522 + htab->elf.splt->output_offset
2523 + h->plt.offset);
2524 unresolved_reloc = FALSE;
2525 break;
2526
2527 case R_390_PLTOFF16:
2528 case R_390_PLTOFF32:
2529 case R_390_PLTOFF64:
2530 /* Relocation is to the entry for this symbol in the
2531 procedure linkage table relative to the start of the GOT. */
2532
2533 /* For local symbols or if we didn't make a PLT entry for
2534 this symbol resolve the symbol directly. */
2535 if (h == NULL
2536 || h->plt.offset == (bfd_vma) -1
2537 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2538 {
2539 relocation -= s390_got_pointer (info);
2540 break;
2541 }
2542
2543 if (s390_is_ifunc_symbol_p (h))
2544 relocation = (htab->elf.iplt->output_section->vma
2545 + htab->elf.iplt->output_offset
2546 + h->plt.offset
2547 - s390_got_pointer (info));
2548 else
2549 relocation = (htab->elf.splt->output_section->vma
2550 + htab->elf.splt->output_offset
2551 + h->plt.offset
2552 - s390_got_pointer (info));
2553 unresolved_reloc = FALSE;
2554 break;
2555
2556 case R_390_PC16:
2557 case R_390_PC12DBL:
2558 case R_390_PC16DBL:
2559 case R_390_PC24DBL:
2560 case R_390_PC32:
2561 case R_390_PC32DBL:
2562 case R_390_PC64:
2563 if (h != NULL
2564 && bfd_link_pie (info)
2565 && !h->def_regular)
2566 {
2567 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2568 "in shared library and accessed "
2569 "from executable "
2570 "(rebuild file with -fPIC ?)"),
2571 input_bfd, h->root.root.string);
2572 bfd_set_error (bfd_error_bad_value);
2573 return FALSE;
2574 }
2575 /* The target of these relocs are instruction operands
2576 residing in read-only sections. We cannot emit a runtime
2577 reloc for it. */
2578 if (h != NULL
2579 && s390_is_ifunc_symbol_p (h)
2580 && h->def_regular
2581 && bfd_link_pic (info))
2582 {
2583 relocation = (htab->elf.iplt->output_section->vma
2584 + htab->elf.iplt->output_offset
2585 + h->plt.offset);
2586 goto do_relocation;
2587 }
2588 /* Fall through. */
2589
2590 case R_390_8:
2591 case R_390_16:
2592 case R_390_32:
2593 case R_390_64:
2594
2595 if ((input_section->flags & SEC_ALLOC) == 0)
2596 break;
2597
2598 if (h != NULL
2599 && s390_is_ifunc_symbol_p (h)
2600 && h->def_regular)
2601 {
2602 if (!bfd_link_pic (info))
2603 {
2604 /* For a non-shared object the symbol will not
2605 change. Hence we can write the address of the
2606 target IPLT slot now. */
2607 relocation = (htab->elf.iplt->output_section->vma
2608 + htab->elf.iplt->output_offset
2609 + h ->plt.offset);
2610 goto do_relocation;
2611 }
2612 else
2613 {
2614 /* For shared objects a runtime relocation is needed. */
2615
2616 Elf_Internal_Rela outrel;
2617 asection *sreloc;
2618
2619 /* Need a dynamic relocation to get the real function
2620 address. */
2621 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2622 info,
2623 input_section,
2624 rel->r_offset);
2625 if (outrel.r_offset == (bfd_vma) -1
2626 || outrel.r_offset == (bfd_vma) -2)
2627 abort ();
2628
2629 outrel.r_offset += (input_section->output_section->vma
2630 + input_section->output_offset);
2631
2632 if (h->dynindx == -1
2633 || h->forced_local
2634 || bfd_link_executable (info))
2635 {
2636 /* This symbol is resolved locally. */
2637 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2638 outrel.r_addend = (h->root.u.def.value
2639 + h->root.u.def.section->output_section->vma
2640 + h->root.u.def.section->output_offset);
2641 }
2642 else
2643 {
2644 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2645 outrel.r_addend = 0;
2646 }
2647
2648 sreloc = htab->elf.irelifunc;
2649 elf_append_rela (output_bfd, sreloc, &outrel);
2650
2651 /* If this reloc is against an external symbol, we
2652 do not want to fiddle with the addend. Otherwise,
2653 we need to include the symbol value so that it
2654 becomes an addend for the dynamic reloc. For an
2655 internal symbol, we have updated addend. */
2656 continue;
2657 }
2658 }
2659
2660 if ((bfd_link_pic (info)
2661 && (h == NULL
2662 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2663 && !resolved_to_zero)
2664 || h->root.type != bfd_link_hash_undefweak)
2665 && ((r_type != R_390_PC16
2666 && r_type != R_390_PC12DBL
2667 && r_type != R_390_PC16DBL
2668 && r_type != R_390_PC24DBL
2669 && r_type != R_390_PC32
2670 && r_type != R_390_PC32DBL
2671 && r_type != R_390_PC64)
2672 || !SYMBOL_CALLS_LOCAL (info, h)))
2673 || (ELIMINATE_COPY_RELOCS
2674 && !bfd_link_pic (info)
2675 && h != NULL
2676 && h->dynindx != -1
2677 && !h->non_got_ref
2678 && ((h->def_dynamic
2679 && !h->def_regular)
2680 || h->root.type == bfd_link_hash_undefweak
2681 || h->root.type == bfd_link_hash_undefined)))
2682 {
2683 Elf_Internal_Rela outrel;
2684 bfd_boolean skip, relocate;
2685 asection *sreloc;
2686 bfd_byte *loc;
2687
2688 /* When generating a shared object, these relocations
2689 are copied into the output file to be resolved at run
2690 time. */
2691 skip = FALSE;
2692 relocate = FALSE;
2693
2694 outrel.r_offset =
2695 _bfd_elf_section_offset (output_bfd, info, input_section,
2696 rel->r_offset);
2697 if (outrel.r_offset == (bfd_vma) -1)
2698 skip = TRUE;
2699 else if (outrel.r_offset == (bfd_vma) -2)
2700 skip = TRUE, relocate = TRUE;
2701
2702 outrel.r_offset += (input_section->output_section->vma
2703 + input_section->output_offset);
2704
2705 if (skip)
2706 memset (&outrel, 0, sizeof outrel);
2707 else if (h != NULL
2708 && h->dynindx != -1
2709 && (r_type == R_390_PC16
2710 || r_type == R_390_PC12DBL
2711 || r_type == R_390_PC16DBL
2712 || r_type == R_390_PC24DBL
2713 || r_type == R_390_PC32
2714 || r_type == R_390_PC32DBL
2715 || r_type == R_390_PC64
2716 || !bfd_link_pic (info)
2717 || !SYMBOLIC_BIND (info, h)
2718 || !h->def_regular))
2719 {
2720 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2721 outrel.r_addend = rel->r_addend;
2722 }
2723 else
2724 {
2725 /* This symbol is local, or marked to become local. */
2726 outrel.r_addend = relocation + rel->r_addend;
2727 if (r_type == R_390_64)
2728 {
2729 relocate = TRUE;
2730 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2731 }
2732 else
2733 {
2734 long sindx;
2735
2736 if (bfd_is_abs_section (sec))
2737 sindx = 0;
2738 else if (sec == NULL || sec->owner == NULL)
2739 {
2740 bfd_set_error(bfd_error_bad_value);
2741 return FALSE;
2742 }
2743 else
2744 {
2745 asection *osec;
2746
2747 osec = sec->output_section;
2748 sindx = elf_section_data (osec)->dynindx;
2749
2750 if (sindx == 0)
2751 {
2752 osec = htab->elf.text_index_section;
2753 sindx = elf_section_data (osec)->dynindx;
2754 }
2755 BFD_ASSERT (sindx != 0);
2756
2757 /* We are turning this relocation into one
2758 against a section symbol, so subtract out
2759 the output section's address but not the
2760 offset of the input section in the output
2761 section. */
2762 outrel.r_addend -= osec->vma;
2763 }
2764 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2765 }
2766 }
2767
2768 sreloc = elf_section_data (input_section)->sreloc;
2769 if (sreloc == NULL)
2770 abort ();
2771
2772 loc = sreloc->contents;
2773 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2774 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2775
2776 /* If this reloc is against an external symbol, we do
2777 not want to fiddle with the addend. Otherwise, we
2778 need to include the symbol value so that it becomes
2779 an addend for the dynamic reloc. */
2780 if (! relocate)
2781 continue;
2782 }
2783
2784 break;
2785
2786 /* Relocations for tls literal pool entries. */
2787 case R_390_TLS_IE64:
2788 if (bfd_link_pic (info))
2789 {
2790 Elf_Internal_Rela outrel;
2791 asection *sreloc;
2792 bfd_byte *loc;
2793
2794 outrel.r_offset = rel->r_offset
2795 + input_section->output_section->vma
2796 + input_section->output_offset;
2797 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2798 sreloc = elf_section_data (input_section)->sreloc;
2799 if (sreloc == NULL)
2800 abort ();
2801 loc = sreloc->contents;
2802 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2803 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2804 }
2805 /* Fall through. */
2806
2807 case R_390_TLS_GD64:
2808 case R_390_TLS_GOTIE64:
2809 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2810 tls_type = GOT_UNKNOWN;
2811 if (h == NULL && local_got_offsets)
2812 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2813 else if (h != NULL)
2814 {
2815 tls_type = elf_s390_hash_entry(h)->tls_type;
2816 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2817 r_type = R_390_TLS_LE64;
2818 }
2819 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2820 r_type = R_390_TLS_IE64;
2821
2822 if (r_type == R_390_TLS_LE64)
2823 {
2824 /* This relocation gets optimized away by the local exec
2825 access optimization. */
2826 BFD_ASSERT (! unresolved_reloc);
2827 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2828 contents + rel->r_offset);
2829 continue;
2830 }
2831
2832 if (htab->elf.sgot == NULL)
2833 abort ();
2834
2835 if (h != NULL)
2836 off = h->got.offset;
2837 else
2838 {
2839 if (local_got_offsets == NULL)
2840 abort ();
2841
2842 off = local_got_offsets[r_symndx];
2843 }
2844
2845 emit_tls_relocs:
2846
2847 if ((off & 1) != 0)
2848 off &= ~1;
2849 else
2850 {
2851 Elf_Internal_Rela outrel;
2852 bfd_byte *loc;
2853 int dr_type, indx;
2854
2855 if (htab->elf.srelgot == NULL)
2856 abort ();
2857
2858 outrel.r_offset = (htab->elf.sgot->output_section->vma
2859 + htab->elf.sgot->output_offset + off);
2860
2861 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2862 if (r_type == R_390_TLS_GD64)
2863 dr_type = R_390_TLS_DTPMOD;
2864 else
2865 dr_type = R_390_TLS_TPOFF;
2866 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2867 outrel.r_addend = relocation - dtpoff_base (info);
2868 else
2869 outrel.r_addend = 0;
2870 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2871 loc = htab->elf.srelgot->contents;
2872 loc += htab->elf.srelgot->reloc_count++
2873 * sizeof (Elf64_External_Rela);
2874 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2875
2876 if (r_type == R_390_TLS_GD64)
2877 {
2878 if (indx == 0)
2879 {
2880 BFD_ASSERT (! unresolved_reloc);
2881 bfd_put_64 (output_bfd,
2882 relocation - dtpoff_base (info),
2883 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2884 }
2885 else
2886 {
2887 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2888 outrel.r_offset += GOT_ENTRY_SIZE;
2889 outrel.r_addend = 0;
2890 htab->elf.srelgot->reloc_count++;
2891 loc += sizeof (Elf64_External_Rela);
2892 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2893 }
2894 }
2895
2896 if (h != NULL)
2897 h->got.offset |= 1;
2898 else
2899 local_got_offsets[r_symndx] |= 1;
2900 }
2901
2902 if (off >= (bfd_vma) -2)
2903 abort ();
2904 if (r_type == ELF64_R_TYPE (rel->r_info))
2905 {
2906 relocation = htab->elf.sgot->output_offset + off;
2907 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2908 relocation += htab->elf.sgot->output_section->vma;
2909 unresolved_reloc = FALSE;
2910 }
2911 else
2912 {
2913 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2914 contents + rel->r_offset);
2915 continue;
2916 }
2917 break;
2918
2919 case R_390_TLS_GOTIE12:
2920 case R_390_TLS_GOTIE20:
2921 case R_390_TLS_IEENT:
2922 if (h == NULL)
2923 {
2924 if (local_got_offsets == NULL)
2925 abort();
2926 off = local_got_offsets[r_symndx];
2927 if (bfd_link_pic (info))
2928 goto emit_tls_relocs;
2929 }
2930 else
2931 {
2932 off = h->got.offset;
2933 tls_type = elf_s390_hash_entry(h)->tls_type;
2934 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2935 goto emit_tls_relocs;
2936 }
2937
2938 if (htab->elf.sgot == NULL)
2939 abort ();
2940
2941 BFD_ASSERT (! unresolved_reloc);
2942 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2943 htab->elf.sgot->contents + off);
2944 relocation = htab->elf.sgot->output_offset + off;
2945 if (r_type == R_390_TLS_IEENT)
2946 relocation += htab->elf.sgot->output_section->vma;
2947 unresolved_reloc = FALSE;
2948 break;
2949
2950 case R_390_TLS_LDM64:
2951 if (! bfd_link_pic (info))
2952 /* The literal pool entry this relocation refers to gets ignored
2953 by the optimized code of the local exec model. Do nothing
2954 and the value will turn out zero. */
2955 continue;
2956
2957 if (htab->elf.sgot == NULL)
2958 abort ();
2959
2960 off = htab->tls_ldm_got.offset;
2961 if (off & 1)
2962 off &= ~1;
2963 else
2964 {
2965 Elf_Internal_Rela outrel;
2966 bfd_byte *loc;
2967
2968 if (htab->elf.srelgot == NULL)
2969 abort ();
2970
2971 outrel.r_offset = (htab->elf.sgot->output_section->vma
2972 + htab->elf.sgot->output_offset + off);
2973
2974 bfd_put_64 (output_bfd, 0,
2975 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2976 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2977 outrel.r_addend = 0;
2978 loc = htab->elf.srelgot->contents;
2979 loc += htab->elf.srelgot->reloc_count++
2980 * sizeof (Elf64_External_Rela);
2981 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2982 htab->tls_ldm_got.offset |= 1;
2983 }
2984 relocation = htab->elf.sgot->output_offset + off;
2985 unresolved_reloc = FALSE;
2986 break;
2987
2988 case R_390_TLS_LE64:
2989 if (bfd_link_dll (info))
2990 {
2991 /* Linking a shared library with non-fpic code requires
2992 a R_390_TLS_TPOFF relocation. */
2993 Elf_Internal_Rela outrel;
2994 asection *sreloc;
2995 bfd_byte *loc;
2996 int indx;
2997
2998 outrel.r_offset = rel->r_offset
2999 + input_section->output_section->vma
3000 + input_section->output_offset;
3001 if (h != NULL && h->dynindx != -1)
3002 indx = h->dynindx;
3003 else
3004 indx = 0;
3005 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3006 if (indx == 0)
3007 outrel.r_addend = relocation - dtpoff_base (info);
3008 else
3009 outrel.r_addend = 0;
3010 sreloc = elf_section_data (input_section)->sreloc;
3011 if (sreloc == NULL)
3012 abort ();
3013 loc = sreloc->contents;
3014 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3015 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3016 }
3017 else
3018 {
3019 BFD_ASSERT (! unresolved_reloc);
3020 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3021 contents + rel->r_offset);
3022 }
3023 continue;
3024
3025 case R_390_TLS_LDO64:
3026 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3027 relocation -= dtpoff_base (info);
3028 else
3029 /* When converting LDO to LE, we must negate. */
3030 relocation = -tpoff (info, relocation);
3031 break;
3032
3033 /* Relocations for tls instructions. */
3034 case R_390_TLS_LOAD:
3035 case R_390_TLS_GDCALL:
3036 case R_390_TLS_LDCALL:
3037 tls_type = GOT_UNKNOWN;
3038 if (h == NULL && local_got_offsets)
3039 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3040 else if (h != NULL)
3041 tls_type = elf_s390_hash_entry(h)->tls_type;
3042
3043 if (tls_type == GOT_TLS_GD)
3044 continue;
3045
3046 if (r_type == R_390_TLS_LOAD)
3047 {
3048 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3049 {
3050 /* IE->LE transition. Four valid cases:
3051 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3052 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3053 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3054 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3055 unsigned int insn0, insn1, ry;
3056
3057 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3058 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3059 if (insn1 != 0x0004)
3060 {
3061 invalid_tls_insn (input_bfd, input_section, rel);
3062 return FALSE;
3063 }
3064 if ((insn0 & 0xff00f000) == 0xe3000000)
3065 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3066 ry = (insn0 & 0x000f0000);
3067 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3068 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3069 ry = (insn0 & 0x0000f000) << 4;
3070 else if ((insn0 & 0xff00f000) == 0xe300c000)
3071 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3072 ry = (insn0 & 0x000f0000);
3073 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3074 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3075 ry = (insn0 & 0x0000f000) << 4;
3076 else
3077 {
3078 invalid_tls_insn (input_bfd, input_section, rel);
3079 return FALSE;
3080 }
3081 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3082 insn1 = 0x000d;
3083 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3084 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3085 }
3086 }
3087 else if (r_type == R_390_TLS_GDCALL)
3088 {
3089 unsigned int insn0, insn1;
3090
3091 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3092 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3093 if ((insn0 & 0xffff0000) != 0xc0e50000)
3094 {
3095 invalid_tls_insn (input_bfd, input_section, rel);
3096 return FALSE;
3097 }
3098 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3099 {
3100 /* GD->LE transition.
3101 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3102 insn0 = 0xc0040000;
3103 insn1 = 0x0000;
3104 }
3105 else
3106 {
3107 /* GD->IE transition.
3108 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3109 insn0 = 0xe322c000;
3110 insn1 = 0x0004;
3111 }
3112 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3113 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3114 }
3115 else if (r_type == R_390_TLS_LDCALL)
3116 {
3117 if (!bfd_link_pic (info))
3118 {
3119 unsigned int insn0, insn1;
3120
3121 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3122 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3123 if ((insn0 & 0xffff0000) != 0xc0e50000)
3124 {
3125 invalid_tls_insn (input_bfd, input_section, rel);
3126 return FALSE;
3127 }
3128 /* LD->LE transition.
3129 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3130 insn0 = 0xc0040000;
3131 insn1 = 0x0000;
3132 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3133 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3134 }
3135 }
3136 continue;
3137
3138 default:
3139 break;
3140 }
3141
3142 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3143 because such sections are not SEC_ALLOC and thus ld.so will
3144 not process them. */
3145 if (unresolved_reloc
3146 && !((input_section->flags & SEC_DEBUGGING) != 0
3147 && h->def_dynamic)
3148 && _bfd_elf_section_offset (output_bfd, info, input_section,
3149 rel->r_offset) != (bfd_vma) -1)
3150 _bfd_error_handler
3151 /* xgettext:c-format */
3152 (_("%pB(%pA+%#" PRIx64 "): "
3153 "unresolvable %s relocation against symbol `%s'"),
3154 input_bfd,
3155 input_section,
3156 (uint64_t) rel->r_offset,
3157 howto->name,
3158 h->root.root.string);
3159
3160 do_relocation:
3161
3162 /* When applying a 24 bit reloc we need to start one byte
3163 earlier. Otherwise the 32 bit get/put bfd operations might
3164 access a byte after the actual section. */
3165 if (r_type == R_390_PC24DBL
3166 || r_type == R_390_PLT24DBL)
3167 rel->r_offset--;
3168
3169 if (r_type == R_390_20
3170 || r_type == R_390_GOT20
3171 || r_type == R_390_GOTPLT20
3172 || r_type == R_390_TLS_GOTIE20)
3173 {
3174 relocation += rel->r_addend;
3175 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3176 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3177 contents, rel->r_offset,
3178 relocation, 0);
3179 }
3180 else
3181 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3182 contents, rel->r_offset,
3183 relocation, rel->r_addend);
3184
3185 if (r != bfd_reloc_ok)
3186 {
3187 const char *name;
3188
3189 if (h != NULL)
3190 name = h->root.root.string;
3191 else
3192 {
3193 name = bfd_elf_string_from_elf_section (input_bfd,
3194 symtab_hdr->sh_link,
3195 sym->st_name);
3196 if (name == NULL)
3197 return FALSE;
3198 if (*name == '\0')
3199 name = bfd_section_name (sec);
3200 }
3201
3202 if (r == bfd_reloc_overflow)
3203 (*info->callbacks->reloc_overflow)
3204 (info, (h ? &h->root : NULL), name, howto->name,
3205 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3206 else
3207 {
3208 _bfd_error_handler
3209 /* xgettext:c-format */
3210 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3211 input_bfd, input_section,
3212 (uint64_t) rel->r_offset, name, (int) r);
3213 return FALSE;
3214 }
3215 }
3216 }
3217
3218 return TRUE;
3219 }
3220
3221 /* Generate the PLT slots together with the dynamic relocations needed
3222 for IFUNC symbols. */
3223
3224 static void
3225 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3226 struct bfd_link_info *info,
3227 struct elf_link_hash_entry *h,
3228 struct elf_s390_link_hash_table *htab,
3229 bfd_vma plt_offset,
3230 bfd_vma resolver_address)
3231 {
3232 bfd_vma plt_index;
3233 bfd_vma got_offset;
3234 Elf_Internal_Rela rela;
3235 bfd_byte *loc;
3236 asection *plt, *gotplt, *relplt;
3237
3238 if (htab->elf.iplt == NULL
3239 || htab->elf.igotplt == NULL
3240 || htab->elf.irelplt == NULL)
3241 abort ();
3242
3243 /* Index of the PLT slot within iplt section. */
3244 plt_index = plt_offset / PLT_ENTRY_SIZE;
3245 plt = htab->elf.iplt;
3246 /* Offset into the igot.plt section. */
3247 got_offset = plt_index * GOT_ENTRY_SIZE;
3248 gotplt = htab->elf.igotplt;
3249 relplt = htab->elf.irelplt;
3250
3251 /* Fill in the blueprint of a PLT. */
3252 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3253 PLT_ENTRY_SIZE);
3254
3255 /* Fixup the relative address to the GOT entry */
3256 bfd_put_32 (output_bfd,
3257 (gotplt->output_section->vma +
3258 gotplt->output_offset + got_offset
3259 - (plt->output_section->vma +
3260 plt->output_offset +
3261 plt_offset))/2,
3262 plt->contents + plt_offset + 2);
3263 /* Fixup the relative branch to PLT 0 */
3264 bfd_put_32 (output_bfd, - (plt->output_offset +
3265 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3266 plt->contents + plt_offset + 24);
3267 /* Fixup offset into .rela.plt section. */
3268 bfd_put_32 (output_bfd, relplt->output_offset +
3269 plt_index * sizeof (Elf64_External_Rela),
3270 plt->contents + plt_offset + 28);
3271
3272 /* Fill in the entry in the global offset table.
3273 Points to instruction after GOT offset. */
3274 bfd_put_64 (output_bfd,
3275 (plt->output_section->vma
3276 + plt->output_offset
3277 + plt_offset
3278 + 14),
3279 gotplt->contents + got_offset);
3280
3281 /* Fill in the entry in the .rela.plt section. */
3282 rela.r_offset = (gotplt->output_section->vma
3283 + gotplt->output_offset
3284 + got_offset);
3285
3286 if (!h
3287 || h->dynindx == -1
3288 || ((bfd_link_executable (info)
3289 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3290 && h->def_regular))
3291 {
3292 /* The symbol can be locally resolved. */
3293 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3294 rela.r_addend = resolver_address;
3295 }
3296 else
3297 {
3298 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3299 rela.r_addend = 0;
3300 }
3301
3302 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3303 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3304 }
3305
3306
3307 /* Finish up dynamic symbol handling. We set the contents of various
3308 dynamic sections here. */
3309
3310 static bfd_boolean
3311 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3312 struct bfd_link_info *info,
3313 struct elf_link_hash_entry *h,
3314 Elf_Internal_Sym *sym)
3315 {
3316 struct elf_s390_link_hash_table *htab;
3317 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3318
3319 htab = elf_s390_hash_table (info);
3320 if (htab == NULL)
3321 return FALSE;
3322
3323 if (h->plt.offset != (bfd_vma) -1)
3324 {
3325 bfd_vma plt_index;
3326 bfd_vma gotplt_offset;
3327 Elf_Internal_Rela rela;
3328 bfd_byte *loc;
3329
3330 /* This symbol has an entry in the procedure linkage table. Set
3331 it up. */
3332 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3333 {
3334 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3335 htab, h->plt.offset,
3336 eh->ifunc_resolver_address +
3337 eh->ifunc_resolver_section->output_offset +
3338 eh->ifunc_resolver_section->output_section->vma);
3339
3340 /* Do not return yet. Handling of explicit GOT slots of
3341 IFUNC symbols is below. */
3342 }
3343 else
3344 {
3345 if (h->dynindx == -1
3346 || htab->elf.splt == NULL
3347 || htab->elf.sgotplt == NULL
3348 || htab->elf.srelplt == NULL)
3349 abort ();
3350
3351 /* Calc. index no.
3352 Current offset - size first entry / entry size. */
3353 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3354
3355 /* The slots in the .got.plt correspond to the PLT slots in
3356 the same order. */
3357 gotplt_offset = plt_index * GOT_ENTRY_SIZE;
3358
3359 /* If .got.plt comes first it needs to contain the 3 header
3360 entries. */
3361 if (!s390_gotplt_after_got_p (info))
3362 gotplt_offset += 3 * GOT_ENTRY_SIZE;
3363
3364 /* Fill in the blueprint of a PLT. */
3365 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3366 PLT_ENTRY_SIZE);
3367
3368 /* The first instruction in the PLT entry is a LARL loading
3369 the address of the GOT slot. We write the 4 byte
3370 immediate operand of the LARL instruction here. */
3371 bfd_put_32 (output_bfd,
3372 (htab->elf.sgotplt->output_section->vma +
3373 htab->elf.sgotplt->output_offset + gotplt_offset
3374 - (htab->elf.splt->output_section->vma +
3375 htab->elf.splt->output_offset +
3376 h->plt.offset))/2,
3377 htab->elf.splt->contents + h->plt.offset + 2);
3378 /* Fixup the relative branch to PLT 0 */
3379 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3380 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3381 htab->elf.splt->contents + h->plt.offset + 24);
3382 /* Fixup offset into .rela.plt section. */
3383 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3384 htab->elf.splt->contents + h->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 (htab->elf.splt->output_section->vma
3390 + htab->elf.splt->output_offset
3391 + h->plt.offset
3392 + 14),
3393 htab->elf.sgotplt->contents + gotplt_offset);
3394
3395 /* Fill in the entry in the .rela.plt section. */
3396 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3397 + htab->elf.sgotplt->output_offset
3398 + gotplt_offset);
3399 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3400 rela.r_addend = 0;
3401 loc = htab->elf.srelplt->contents + plt_index *
3402 sizeof (Elf64_External_Rela);
3403 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3404
3405 if (!h->def_regular)
3406 {
3407 /* Mark the symbol as undefined, rather than as defined in
3408 the .plt section. Leave the value alone. This is a clue
3409 for the dynamic linker, to make function pointer
3410 comparisons work between an application and shared
3411 library. */
3412 sym->st_shndx = SHN_UNDEF;
3413 }
3414 }
3415 }
3416
3417 if (h->got.offset != (bfd_vma) -1
3418 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3419 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3420 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3421 {
3422 Elf_Internal_Rela rela;
3423 bfd_byte *loc;
3424
3425 /* This symbol has an entry in the global offset table. Set it
3426 up. */
3427 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3428 abort ();
3429
3430 rela.r_offset = (htab->elf.sgot->output_section->vma
3431 + htab->elf.sgot->output_offset
3432 + (h->got.offset &~ (bfd_vma) 1));
3433
3434 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3435 {
3436 if (bfd_link_pic (info))
3437 {
3438 /* An explicit GOT slot usage needs GLOB_DAT. If the
3439 symbol references local the implicit got.iplt slot
3440 will be used and the IRELATIVE reloc has been created
3441 above. */
3442 goto do_glob_dat;
3443 }
3444 else
3445 {
3446 /* For non-shared objects explicit GOT slots must be
3447 filled with the PLT slot address for pointer
3448 equality reasons. */
3449 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3450 + htab->elf.iplt->output_offset
3451 + h->plt.offset),
3452 htab->elf.sgot->contents + h->got.offset);
3453 return TRUE;
3454 }
3455 }
3456 else if (bfd_link_pic (info)
3457 && SYMBOL_REFERENCES_LOCAL (info, h))
3458 {
3459 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3460 return TRUE;
3461
3462 /* If this is a static link, or it is a -Bsymbolic link and
3463 the symbol is defined locally or was forced to be local
3464 because of a version file, we just want to emit a
3465 RELATIVE reloc. The entry in the global offset table
3466 will already have been initialized in the
3467 relocate_section function. */
3468 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3469 return FALSE;
3470 BFD_ASSERT((h->got.offset & 1) != 0);
3471 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3472 rela.r_addend = (h->root.u.def.value
3473 + h->root.u.def.section->output_section->vma
3474 + h->root.u.def.section->output_offset);
3475 }
3476 else
3477 {
3478 BFD_ASSERT((h->got.offset & 1) == 0);
3479 do_glob_dat:
3480 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3481 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3482 rela.r_addend = 0;
3483 }
3484
3485 loc = htab->elf.srelgot->contents;
3486 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3487 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3488 }
3489
3490 if (h->needs_copy)
3491 {
3492 Elf_Internal_Rela rela;
3493 asection *s;
3494 bfd_byte *loc;
3495
3496 /* This symbols needs a copy reloc. Set it up. */
3497
3498 if (h->dynindx == -1
3499 || (h->root.type != bfd_link_hash_defined
3500 && h->root.type != bfd_link_hash_defweak)
3501 || htab->elf.srelbss == NULL)
3502 abort ();
3503
3504 rela.r_offset = (h->root.u.def.value
3505 + h->root.u.def.section->output_section->vma
3506 + h->root.u.def.section->output_offset);
3507 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3508 rela.r_addend = 0;
3509 if (h->root.u.def.section == htab->elf.sdynrelro)
3510 s = htab->elf.sreldynrelro;
3511 else
3512 s = htab->elf.srelbss;
3513 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3514 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3515 }
3516
3517 /* Mark some specially defined symbols as absolute. */
3518 if (h == htab->elf.hdynamic
3519 || h == htab->elf.hgot
3520 || h == htab->elf.hplt)
3521 sym->st_shndx = SHN_ABS;
3522
3523 return TRUE;
3524 }
3525
3526 /* Used to decide how to sort relocs in an optimal manner for the
3527 dynamic linker, before writing them out. */
3528
3529 static enum elf_reloc_type_class
3530 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3531 const asection *rel_sec ATTRIBUTE_UNUSED,
3532 const Elf_Internal_Rela *rela)
3533 {
3534 bfd *abfd = info->output_bfd;
3535 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3536 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3537 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3538 Elf_Internal_Sym sym;
3539
3540 if (htab->elf.dynsym == NULL
3541 || !bed->s->swap_symbol_in (abfd,
3542 (htab->elf.dynsym->contents
3543 + r_symndx * bed->s->sizeof_sym),
3544 0, &sym))
3545 abort ();
3546
3547 /* Check relocation against STT_GNU_IFUNC symbol. */
3548 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3549 return reloc_class_ifunc;
3550
3551 switch ((int) ELF64_R_TYPE (rela->r_info))
3552 {
3553 case R_390_RELATIVE:
3554 return reloc_class_relative;
3555 case R_390_JMP_SLOT:
3556 return reloc_class_plt;
3557 case R_390_COPY:
3558 return reloc_class_copy;
3559 default:
3560 return reloc_class_normal;
3561 }
3562 }
3563
3564 /* Finish up the dynamic sections. */
3565
3566 static bfd_boolean
3567 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3568 struct bfd_link_info *info)
3569 {
3570 struct elf_s390_link_hash_table *htab;
3571 bfd *dynobj;
3572 asection *sdyn;
3573 bfd *ibfd;
3574 unsigned int i;
3575
3576 htab = elf_s390_hash_table (info);
3577 if (htab == NULL)
3578 return FALSE;
3579
3580 dynobj = htab->elf.dynobj;
3581 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3582
3583 if (htab->elf.dynamic_sections_created)
3584 {
3585 Elf64_External_Dyn *dyncon, *dynconend;
3586
3587 if (sdyn == NULL || htab->elf.sgot == NULL)
3588 abort ();
3589
3590 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3591 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3592 for (; dyncon < dynconend; dyncon++)
3593 {
3594 Elf_Internal_Dyn dyn;
3595 asection *s;
3596
3597 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3598
3599 switch (dyn.d_tag)
3600 {
3601 default:
3602 continue;
3603
3604 case DT_PLTGOT:
3605 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3606 dyn.d_un.d_ptr = s390_got_pointer (info);
3607 break;
3608
3609 case DT_JMPREL:
3610 s = htab->elf.srelplt;
3611 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3612 break;
3613
3614 case DT_PLTRELSZ:
3615 dyn.d_un.d_val = htab->elf.srelplt->size;
3616 if (htab->elf.irelplt)
3617 dyn.d_un.d_val += htab->elf.irelplt->size;
3618 break;
3619
3620 case DT_RELASZ:
3621 /* The procedure linkage table relocs (DT_JMPREL) should
3622 not be included in the overall relocs (DT_RELA).
3623 Therefore, we override the DT_RELASZ entry here to
3624 make it not include the JMPREL relocs. Since the
3625 linker script arranges for .rela.plt to follow all
3626 other relocation sections, we don't have to worry
3627 about changing the DT_RELA entry. */
3628 dyn.d_un.d_val -= htab->elf.srelplt->size;
3629 if (htab->elf.irelplt)
3630 dyn.d_un.d_val -= htab->elf.irelplt->size;
3631 break;
3632 }
3633
3634 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3635 }
3636
3637 /* Fill in the special first entry in the procedure linkage table. */
3638 if (htab->elf.splt && htab->elf.splt->size > 0)
3639 {
3640 /* fill in blueprint for plt 0 entry */
3641 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3642 PLT_FIRST_ENTRY_SIZE);
3643 /* The second instruction in the first PLT entry is a LARL
3644 loading the GOT pointer. Fill in the LARL immediate
3645 address. */
3646 bfd_put_32 (output_bfd,
3647 (s390_got_pointer (info)
3648 - htab->elf.splt->output_section->vma
3649 - htab->elf.splt->output_offset - 6)/2,
3650 htab->elf.splt->contents + 8);
3651 }
3652 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3653 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3654 = PLT_ENTRY_SIZE;
3655 }
3656
3657 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
3658 {
3659 /* Fill in the first three entries in the global offset table. */
3660 if (htab->elf.hgot->root.u.def.section->size > 0)
3661 {
3662 bfd_put_64 (output_bfd,
3663 (sdyn == NULL ? (bfd_vma) 0
3664 : sdyn->output_section->vma + sdyn->output_offset),
3665 htab->elf.hgot->root.u.def.section->contents);
3666 /* One entry for shared object struct ptr. */
3667 bfd_put_64 (output_bfd, (bfd_vma) 0,
3668 htab->elf.hgot->root.u.def.section->contents + 8);
3669 /* One entry for _dl_runtime_resolve. */
3670 bfd_put_64 (output_bfd, (bfd_vma) 0,
3671 htab->elf.hgot->root.u.def.section->contents + 16);
3672 }
3673 elf_section_data (htab->elf.sgot->output_section)
3674 ->this_hdr.sh_entsize = 8;
3675 }
3676
3677 /* Finish dynamic symbol for local IFUNC symbols. */
3678 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3679 {
3680 struct plt_entry *local_plt;
3681 Elf_Internal_Sym *isym;
3682 Elf_Internal_Shdr *symtab_hdr;
3683
3684 symtab_hdr = &elf_symtab_hdr (ibfd);
3685
3686 if (!is_s390_elf (ibfd))
3687 continue;
3688
3689 local_plt = elf_s390_local_plt (ibfd);
3690 if (local_plt != NULL)
3691 for (i = 0; i < symtab_hdr->sh_info; i++)
3692 {
3693 if (local_plt[i].plt.offset != (bfd_vma) -1)
3694 {
3695 asection *sec = local_plt[i].sec;
3696 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3697 if (isym == NULL)
3698 return FALSE;
3699
3700 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3701 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3702 local_plt[i].plt.offset,
3703 isym->st_value
3704 + sec->output_section->vma
3705 + sec->output_offset);
3706
3707 }
3708 }
3709 }
3710
3711 return TRUE;
3712 }
3713 \f
3714 /* Support for core dump NOTE sections. */
3715
3716 static bfd_boolean
3717 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3718 {
3719 int offset;
3720 size_t size;
3721
3722 switch (note->descsz)
3723 {
3724 default:
3725 return FALSE;
3726
3727 case 336: /* sizeof(struct elf_prstatus) on s390x */
3728 /* pr_cursig */
3729 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3730
3731 /* pr_pid */
3732 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3733
3734 /* pr_reg */
3735 offset = 112;
3736 size = 216;
3737 break;
3738 }
3739
3740 /* Make a ".reg/999" section. */
3741 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3742 size, note->descpos + offset);
3743 }
3744
3745 static bfd_boolean
3746 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3747 {
3748 switch (note->descsz)
3749 {
3750 default:
3751 return FALSE;
3752
3753 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3754 elf_tdata (abfd)->core->pid
3755 = bfd_get_32 (abfd, note->descdata + 24);
3756 elf_tdata (abfd)->core->program
3757 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3758 elf_tdata (abfd)->core->command
3759 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3760 }
3761
3762 /* Note that for some reason, a spurious space is tacked
3763 onto the end of the args in some (at least one anyway)
3764 implementations, so strip it off if it exists. */
3765
3766 {
3767 char *command = elf_tdata (abfd)->core->command;
3768 int n = strlen (command);
3769
3770 if (0 < n && command[n - 1] == ' ')
3771 command[n - 1] = '\0';
3772 }
3773
3774 return TRUE;
3775 }
3776
3777 static char *
3778 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3779 int note_type, ...)
3780 {
3781 va_list ap;
3782
3783 switch (note_type)
3784 {
3785 default:
3786 return NULL;
3787
3788 case NT_PRPSINFO:
3789 {
3790 char data[136] ATTRIBUTE_NONSTRING = { 0 };
3791 const char *fname, *psargs;
3792
3793 va_start (ap, note_type);
3794 fname = va_arg (ap, const char *);
3795 psargs = va_arg (ap, const char *);
3796 va_end (ap);
3797
3798 strncpy (data + 40, fname, 16);
3799 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3800 DIAGNOSTIC_PUSH;
3801 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3802 -Wstringop-truncation:
3803 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3804 */
3805 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3806 #endif
3807 strncpy (data + 56, psargs, 80);
3808 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3809 DIAGNOSTIC_POP;
3810 #endif
3811 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3812 &data, sizeof (data));
3813 }
3814
3815 case NT_PRSTATUS:
3816 {
3817 char data[336] = { 0 };
3818 long pid;
3819 int cursig;
3820 const void *gregs;
3821
3822 va_start (ap, note_type);
3823 pid = va_arg (ap, long);
3824 cursig = va_arg (ap, int);
3825 gregs = va_arg (ap, const void *);
3826 va_end (ap);
3827
3828 bfd_put_16 (abfd, cursig, data + 12);
3829 bfd_put_32 (abfd, pid, data + 32);
3830 memcpy (data + 112, gregs, 216);
3831 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3832 &data, sizeof (data));
3833 }
3834 }
3835 /* NOTREACHED */
3836 }
3837 \f
3838 /* Return address for Ith PLT stub in section PLT, for relocation REL
3839 or (bfd_vma) -1 if it should not be included. */
3840
3841 static bfd_vma
3842 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3843 const arelent *rel ATTRIBUTE_UNUSED)
3844 {
3845 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3846 }
3847
3848 /* Merge backend specific data from an object file to the output
3849 object file when linking. */
3850
3851 static bfd_boolean
3852 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3853 {
3854 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3855 return TRUE;
3856
3857 return elf_s390_merge_obj_attributes (ibfd, info);
3858 }
3859
3860 /* We may add a PT_S390_PGSTE program header. */
3861
3862 static int
3863 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3864 struct bfd_link_info *info)
3865 {
3866 struct elf_s390_link_hash_table *htab;
3867
3868 if (info)
3869 {
3870 htab = elf_s390_hash_table (info);
3871 if (htab)
3872 return htab->params->pgste;
3873 }
3874 return 0;
3875 }
3876
3877
3878 /* Add the PT_S390_PGSTE program header. */
3879
3880 static bfd_boolean
3881 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3882 {
3883 struct elf_s390_link_hash_table *htab;
3884 struct elf_segment_map *m, *pm = NULL;
3885
3886 if (!abfd || !info)
3887 return TRUE;
3888
3889 htab = elf_s390_hash_table (info);
3890 if (!htab || !htab->params->pgste)
3891 return TRUE;
3892
3893 /* If there is already a PT_S390_PGSTE header, avoid adding
3894 another. */
3895 m = elf_seg_map (abfd);
3896 while (m && m->p_type != PT_S390_PGSTE)
3897 {
3898 pm = m;
3899 m = m->next;
3900 }
3901
3902 if (m)
3903 return TRUE;
3904
3905 m = (struct elf_segment_map *)
3906 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3907 if (m == NULL)
3908 return FALSE;
3909 m->p_type = PT_S390_PGSTE;
3910 m->count = 0;
3911 m->next = NULL;
3912 if (pm)
3913 pm->next = m;
3914
3915 return TRUE;
3916 }
3917
3918 bfd_boolean
3919 bfd_elf_s390_set_options (struct bfd_link_info *info,
3920 struct s390_elf_params *params)
3921 {
3922 struct elf_s390_link_hash_table *htab;
3923
3924 if (info)
3925 {
3926 htab = elf_s390_hash_table (info);
3927 if (htab)
3928 htab->params = params;
3929 }
3930
3931 return TRUE;
3932 }
3933
3934
3935 /* Why was the hash table entry size definition changed from
3936 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3937 this is the only reason for the s390_elf64_size_info structure. */
3938
3939 const struct elf_size_info s390_elf64_size_info =
3940 {
3941 sizeof (Elf64_External_Ehdr),
3942 sizeof (Elf64_External_Phdr),
3943 sizeof (Elf64_External_Shdr),
3944 sizeof (Elf64_External_Rel),
3945 sizeof (Elf64_External_Rela),
3946 sizeof (Elf64_External_Sym),
3947 sizeof (Elf64_External_Dyn),
3948 sizeof (Elf_External_Note),
3949 8, /* hash-table entry size. */
3950 1, /* internal relocations per external relocations. */
3951 64, /* arch_size. */
3952 3, /* log_file_align. */
3953 ELFCLASS64, EV_CURRENT,
3954 bfd_elf64_write_out_phdrs,
3955 bfd_elf64_write_shdrs_and_ehdr,
3956 bfd_elf64_checksum_contents,
3957 bfd_elf64_write_relocs,
3958 bfd_elf64_swap_symbol_in,
3959 bfd_elf64_swap_symbol_out,
3960 bfd_elf64_slurp_reloc_table,
3961 bfd_elf64_slurp_symbol_table,
3962 bfd_elf64_swap_dyn_in,
3963 bfd_elf64_swap_dyn_out,
3964 bfd_elf64_swap_reloc_in,
3965 bfd_elf64_swap_reloc_out,
3966 bfd_elf64_swap_reloca_in,
3967 bfd_elf64_swap_reloca_out
3968 };
3969
3970 #define TARGET_BIG_SYM s390_elf64_vec
3971 #define TARGET_BIG_NAME "elf64-s390"
3972 #define ELF_ARCH bfd_arch_s390
3973 #define ELF_TARGET_ID S390_ELF_DATA
3974 #define ELF_MACHINE_CODE EM_S390
3975 #define ELF_MACHINE_ALT1 EM_S390_OLD
3976 #define ELF_MAXPAGESIZE 0x1000
3977
3978 #define elf_backend_size_info s390_elf64_size_info
3979
3980 #define elf_backend_can_gc_sections 1
3981 #define elf_backend_can_refcount 1
3982 #define elf_backend_want_got_plt 1
3983 #define elf_backend_plt_readonly 1
3984 #define elf_backend_want_plt_sym 0
3985 #define elf_backend_got_header_size 24
3986 #define elf_backend_want_dynrelro 1
3987 #define elf_backend_rela_normal 1
3988
3989 #define elf_info_to_howto elf_s390_info_to_howto
3990
3991 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3992 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3993 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3994 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3995 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3996
3997 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3998 #define elf_backend_check_relocs elf_s390_check_relocs
3999 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4000 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4001 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4002 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4003 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4004 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4005 #define elf_backend_relocate_section elf_s390_relocate_section
4006 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4007 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4008 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4009 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4010 #define elf_backend_write_core_note elf_s390_write_core_note
4011 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4012 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4013 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
4014 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
4015
4016 #define bfd_elf64_mkobject elf_s390_mkobject
4017 #define elf_backend_object_p elf_s390_object_p
4018
4019 #include "elf64-target.h"
GDB Binutils - Deliverables
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