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