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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 if (dir->versioned != versioned_hidden)
789 dir->ref_dynamic |= ind->ref_dynamic;
790 dir->ref_regular |= ind->ref_regular;
791 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
792 dir->needs_plt |= ind->needs_plt;
793 }
794 else
795 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
796 }
797
798 static int
799 elf_s390_tls_transition (struct bfd_link_info *info,
800 int r_type,
801 int is_local)
802 {
803 if (bfd_link_pic (info))
804 return r_type;
805
806 switch (r_type)
807 {
808 case R_390_TLS_GD64:
809 case R_390_TLS_IE64:
810 if (is_local)
811 return R_390_TLS_LE64;
812 return R_390_TLS_IE64;
813 case R_390_TLS_GOTIE64:
814 if (is_local)
815 return R_390_TLS_LE64;
816 return R_390_TLS_GOTIE64;
817 case R_390_TLS_LDM64:
818 return R_390_TLS_LE64;
819 }
820
821 return r_type;
822 }
823
824 /* Look through the relocs for a section during the first phase, and
825 allocate space in the global offset table or procedure linkage
826 table. */
827
828 static bfd_boolean
829 elf_s390_check_relocs (bfd *abfd,
830 struct bfd_link_info *info,
831 asection *sec,
832 const Elf_Internal_Rela *relocs)
833 {
834 struct elf_s390_link_hash_table *htab;
835 Elf_Internal_Shdr *symtab_hdr;
836 struct elf_link_hash_entry **sym_hashes;
837 const Elf_Internal_Rela *rel;
838 const Elf_Internal_Rela *rel_end;
839 asection *sreloc;
840 bfd_signed_vma *local_got_refcounts;
841 int tls_type, old_tls_type;
842
843 if (bfd_link_relocatable (info))
844 return TRUE;
845
846 BFD_ASSERT (is_s390_elf (abfd));
847
848 htab = elf_s390_hash_table (info);
849 if (htab == NULL)
850 return FALSE;
851
852 symtab_hdr = &elf_symtab_hdr (abfd);
853 sym_hashes = elf_sym_hashes (abfd);
854 local_got_refcounts = elf_local_got_refcounts (abfd);
855
856 sreloc = NULL;
857
858 rel_end = relocs + sec->reloc_count;
859 for (rel = relocs; rel < rel_end; rel++)
860 {
861 unsigned int r_type;
862 unsigned long r_symndx;
863 struct elf_link_hash_entry *h;
864 Elf_Internal_Sym *isym;
865
866 r_symndx = ELF64_R_SYM (rel->r_info);
867
868 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
869 {
870 /* xgettext:c-format */
871 _bfd_error_handler (_("%B: bad symbol index: %d"),
872 abfd, r_symndx);
873 return FALSE;
874 }
875
876 if (r_symndx < symtab_hdr->sh_info)
877 {
878 /* A local symbol. */
879 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
880 abfd, r_symndx);
881 if (isym == NULL)
882 return FALSE;
883
884 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
885 {
886 struct plt_entry *plt;
887
888 if (htab->elf.dynobj == NULL)
889 htab->elf.dynobj = abfd;
890
891 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
892 return FALSE;
893
894 if (local_got_refcounts == NULL)
895 {
896 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
897 return FALSE;
898 local_got_refcounts = elf_local_got_refcounts (abfd);
899 }
900 plt = elf_s390_local_plt (abfd);
901 plt[r_symndx].plt.refcount++;
902 }
903 h = NULL;
904 }
905 else
906 {
907 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
908 while (h->root.type == bfd_link_hash_indirect
909 || h->root.type == bfd_link_hash_warning)
910 h = (struct elf_link_hash_entry *) h->root.u.i.link;
911
912 /* PR15323, ref flags aren't set for references in the same
913 object. */
914 h->root.non_ir_ref = 1;
915 }
916
917 /* Create got section and local_got_refcounts array if they
918 are needed. */
919 r_type = elf_s390_tls_transition (info,
920 ELF64_R_TYPE (rel->r_info),
921 h == NULL);
922 switch (r_type)
923 {
924 case R_390_GOT12:
925 case R_390_GOT16:
926 case R_390_GOT20:
927 case R_390_GOT32:
928 case R_390_GOT64:
929 case R_390_GOTENT:
930 case R_390_GOTPLT12:
931 case R_390_GOTPLT16:
932 case R_390_GOTPLT20:
933 case R_390_GOTPLT32:
934 case R_390_GOTPLT64:
935 case R_390_GOTPLTENT:
936 case R_390_TLS_GD64:
937 case R_390_TLS_GOTIE12:
938 case R_390_TLS_GOTIE20:
939 case R_390_TLS_GOTIE64:
940 case R_390_TLS_IEENT:
941 case R_390_TLS_IE64:
942 case R_390_TLS_LDM64:
943 if (h == NULL
944 && local_got_refcounts == NULL)
945 {
946 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
947 return FALSE;
948 local_got_refcounts = elf_local_got_refcounts (abfd);
949 }
950
951 /* Fall through. */
952 case R_390_GOTOFF16:
953 case R_390_GOTOFF32:
954 case R_390_GOTOFF64:
955 case R_390_GOTPC:
956 case R_390_GOTPCDBL:
957 if (htab->elf.sgot == NULL)
958 {
959 if (htab->elf.dynobj == NULL)
960 htab->elf.dynobj = abfd;
961 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
962 return FALSE;
963 }
964 }
965
966 if (h != NULL)
967 {
968 if (htab->elf.dynobj == NULL)
969 htab->elf.dynobj = abfd;
970 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
971 return FALSE;
972
973 /* Make sure an IFUNC symbol defined in a non-shared object
974 always gets a PLT slot. */
975 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
976 {
977 /* The symbol is called by the dynamic loader in order
978 to resolve the relocation. So it is in fact also
979 referenced. */
980 h->ref_regular = 1;
981 h->needs_plt = 1;
982 }
983 }
984
985 switch (r_type)
986 {
987 case R_390_GOTPC:
988 case R_390_GOTPCDBL:
989 /* These relocs do not need a GOT slot. They just load the
990 GOT pointer itself or address something else relative to
991 the GOT. Since the GOT pointer has been set up above we
992 are done. */
993 break;
994 case R_390_GOTOFF16:
995 case R_390_GOTOFF32:
996 case R_390_GOTOFF64:
997 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
998 break;
999 /* Fall through. */
1000
1001 case R_390_PLT12DBL:
1002 case R_390_PLT16DBL:
1003 case R_390_PLT24DBL:
1004 case R_390_PLT32:
1005 case R_390_PLT32DBL:
1006 case R_390_PLT64:
1007 case R_390_PLTOFF16:
1008 case R_390_PLTOFF32:
1009 case R_390_PLTOFF64:
1010 /* This symbol requires a procedure linkage table entry. We
1011 actually build the entry in adjust_dynamic_symbol,
1012 because this might be a case of linking PIC code which is
1013 never referenced by a dynamic object, in which case we
1014 don't need to generate a procedure linkage table entry
1015 after all. */
1016
1017 /* If this is a local symbol, we resolve it directly without
1018 creating a procedure linkage table entry. */
1019 if (h != NULL)
1020 {
1021 h->needs_plt = 1;
1022 h->plt.refcount += 1;
1023 }
1024 break;
1025
1026 case R_390_GOTPLT12:
1027 case R_390_GOTPLT16:
1028 case R_390_GOTPLT20:
1029 case R_390_GOTPLT32:
1030 case R_390_GOTPLT64:
1031 case R_390_GOTPLTENT:
1032 /* This symbol requires either a procedure linkage table entry
1033 or an entry in the local got. We actually build the entry
1034 in adjust_dynamic_symbol because whether this is really a
1035 global reference can change and with it the fact if we have
1036 to create a plt entry or a local got entry. To be able to
1037 make a once global symbol a local one we have to keep track
1038 of the number of gotplt references that exist for this
1039 symbol. */
1040 if (h != NULL)
1041 {
1042 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1043 h->needs_plt = 1;
1044 h->plt.refcount += 1;
1045 }
1046 else
1047 local_got_refcounts[r_symndx] += 1;
1048 break;
1049
1050 case R_390_TLS_LDM64:
1051 htab->tls_ldm_got.refcount += 1;
1052 break;
1053
1054 case R_390_TLS_IE64:
1055 case R_390_TLS_GOTIE12:
1056 case R_390_TLS_GOTIE20:
1057 case R_390_TLS_GOTIE64:
1058 case R_390_TLS_IEENT:
1059 if (bfd_link_pic (info))
1060 info->flags |= DF_STATIC_TLS;
1061 /* Fall through */
1062
1063 case R_390_GOT12:
1064 case R_390_GOT16:
1065 case R_390_GOT20:
1066 case R_390_GOT32:
1067 case R_390_GOT64:
1068 case R_390_GOTENT:
1069 case R_390_TLS_GD64:
1070 /* This symbol requires a global offset table entry. */
1071 switch (r_type)
1072 {
1073 default:
1074 case R_390_GOT12:
1075 case R_390_GOT16:
1076 case R_390_GOT20:
1077 case R_390_GOT32:
1078 case R_390_GOTENT:
1079 tls_type = GOT_NORMAL;
1080 break;
1081 case R_390_TLS_GD64:
1082 tls_type = GOT_TLS_GD;
1083 break;
1084 case R_390_TLS_IE64:
1085 case R_390_TLS_GOTIE64:
1086 tls_type = GOT_TLS_IE;
1087 break;
1088 case R_390_TLS_GOTIE12:
1089 case R_390_TLS_GOTIE20:
1090 case R_390_TLS_IEENT:
1091 tls_type = GOT_TLS_IE_NLT;
1092 break;
1093 }
1094
1095 if (h != NULL)
1096 {
1097 h->got.refcount += 1;
1098 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1099 }
1100 else
1101 {
1102 local_got_refcounts[r_symndx] += 1;
1103 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1104 }
1105 /* If a TLS symbol is accessed using IE at least once,
1106 there is no point to use dynamic model for it. */
1107 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1108 {
1109 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1110 {
1111 _bfd_error_handler
1112 /* xgettext:c-format */
1113 (_("%B: `%s' accessed both as normal and thread local symbol"),
1114 abfd, h->root.root.string);
1115 return FALSE;
1116 }
1117 if (old_tls_type > tls_type)
1118 tls_type = old_tls_type;
1119 }
1120
1121 if (old_tls_type != tls_type)
1122 {
1123 if (h != NULL)
1124 elf_s390_hash_entry (h)->tls_type = tls_type;
1125 else
1126 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1127 }
1128
1129 if (r_type != R_390_TLS_IE64)
1130 break;
1131 /* Fall through */
1132
1133 case R_390_TLS_LE64:
1134 /* For static linking and executables this reloc will be
1135 calculated at linktime otherwise a TLS_TPOFF runtime
1136 reloc will be generated. */
1137 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1138 break;
1139
1140 if (!bfd_link_pic (info))
1141 break;
1142 info->flags |= DF_STATIC_TLS;
1143 /* Fall through */
1144
1145 case R_390_8:
1146 case R_390_16:
1147 case R_390_32:
1148 case R_390_64:
1149 case R_390_PC12DBL:
1150 case R_390_PC16:
1151 case R_390_PC16DBL:
1152 case R_390_PC24DBL:
1153 case R_390_PC32:
1154 case R_390_PC32DBL:
1155 case R_390_PC64:
1156 if (h != NULL && bfd_link_executable (info))
1157 {
1158 /* If this reloc is in a read-only section, we might
1159 need a copy reloc. We can't check reliably at this
1160 stage whether the section is read-only, as input
1161 sections have not yet been mapped to output sections.
1162 Tentatively set the flag for now, and correct in
1163 adjust_dynamic_symbol. */
1164 h->non_got_ref = 1;
1165
1166 if (!bfd_link_pic (info))
1167 {
1168 /* We may need a .plt entry if the function this reloc
1169 refers to is in a shared lib. */
1170 h->plt.refcount += 1;
1171 }
1172 }
1173
1174 /* If we are creating a shared library, and this is a reloc
1175 against a global symbol, or a non PC relative reloc
1176 against a local symbol, then we need to copy the reloc
1177 into the shared library. However, if we are linking with
1178 -Bsymbolic, we do not need to copy a reloc against a
1179 global symbol which is defined in an object we are
1180 including in the link (i.e., DEF_REGULAR is set). At
1181 this point we have not seen all the input files, so it is
1182 possible that DEF_REGULAR is not set now but will be set
1183 later (it is never cleared). In case of a weak definition,
1184 DEF_REGULAR may be cleared later by a strong definition in
1185 a shared library. We account for that possibility below by
1186 storing information in the relocs_copied field of the hash
1187 table entry. A similar situation occurs when creating
1188 shared libraries and symbol visibility changes render the
1189 symbol local.
1190
1191 If on the other hand, we are creating an executable, we
1192 may need to keep relocations for symbols satisfied by a
1193 dynamic library if we manage to avoid copy relocs for the
1194 symbol. */
1195 if ((bfd_link_pic (info)
1196 && (sec->flags & SEC_ALLOC) != 0
1197 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1198 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1199 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1200 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1201 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1202 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1203 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1204 || (h != NULL
1205 && (! SYMBOLIC_BIND (info, h)
1206 || h->root.type == bfd_link_hash_defweak
1207 || !h->def_regular))))
1208 || (ELIMINATE_COPY_RELOCS
1209 && !bfd_link_pic (info)
1210 && (sec->flags & SEC_ALLOC) != 0
1211 && h != NULL
1212 && (h->root.type == bfd_link_hash_defweak
1213 || !h->def_regular)))
1214 {
1215 struct elf_dyn_relocs *p;
1216 struct elf_dyn_relocs **head;
1217
1218 /* We must copy these reloc types into the output file.
1219 Create a reloc section in dynobj and make room for
1220 this reloc. */
1221 if (sreloc == NULL)
1222 {
1223 if (htab->elf.dynobj == NULL)
1224 htab->elf.dynobj = abfd;
1225
1226 sreloc = _bfd_elf_make_dynamic_reloc_section
1227 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1228
1229 if (sreloc == NULL)
1230 return FALSE;
1231 }
1232
1233 /* If this is a global symbol, we count the number of
1234 relocations we need for this symbol. */
1235 if (h != NULL)
1236 {
1237 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1238 }
1239 else
1240 {
1241 /* Track dynamic relocs needed for local syms too.
1242 We really need local syms available to do this
1243 easily. Oh well. */
1244 asection *s;
1245 void *vpp;
1246
1247 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1248 abfd, r_symndx);
1249 if (isym == NULL)
1250 return FALSE;
1251
1252 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1253 if (s == NULL)
1254 s = sec;
1255
1256 vpp = &elf_section_data (s)->local_dynrel;
1257 head = (struct elf_dyn_relocs **) vpp;
1258 }
1259
1260 p = *head;
1261 if (p == NULL || p->sec != sec)
1262 {
1263 bfd_size_type amt = sizeof *p;
1264 p = ((struct elf_dyn_relocs *)
1265 bfd_alloc (htab->elf.dynobj, amt));
1266 if (p == NULL)
1267 return FALSE;
1268 p->next = *head;
1269 *head = p;
1270 p->sec = sec;
1271 p->count = 0;
1272 p->pc_count = 0;
1273 }
1274
1275 p->count += 1;
1276 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1277 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1278 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1279 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1280 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1281 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1282 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1283 p->pc_count += 1;
1284 }
1285 break;
1286
1287 /* This relocation describes the C++ object vtable hierarchy.
1288 Reconstruct it for later use during GC. */
1289 case R_390_GNU_VTINHERIT:
1290 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1291 return FALSE;
1292 break;
1293
1294 /* This relocation describes which C++ vtable entries are actually
1295 used. Record for later use during GC. */
1296 case R_390_GNU_VTENTRY:
1297 BFD_ASSERT (h != NULL);
1298 if (h != NULL
1299 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1300 return FALSE;
1301 break;
1302
1303 default:
1304 break;
1305 }
1306 }
1307
1308 return TRUE;
1309 }
1310
1311 /* Return the section that should be marked against GC for a given
1312 relocation. */
1313
1314 static asection *
1315 elf_s390_gc_mark_hook (asection *sec,
1316 struct bfd_link_info *info,
1317 Elf_Internal_Rela *rel,
1318 struct elf_link_hash_entry *h,
1319 Elf_Internal_Sym *sym)
1320 {
1321 if (h != NULL)
1322 switch (ELF64_R_TYPE (rel->r_info))
1323 {
1324 case R_390_GNU_VTINHERIT:
1325 case R_390_GNU_VTENTRY:
1326 return NULL;
1327 }
1328
1329 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1330 }
1331
1332 /* Update the got entry reference counts for the section being removed. */
1333
1334 static bfd_boolean
1335 elf_s390_gc_sweep_hook (bfd *abfd,
1336 struct bfd_link_info *info,
1337 asection *sec,
1338 const Elf_Internal_Rela *relocs)
1339 {
1340 struct elf_s390_link_hash_table *htab;
1341 Elf_Internal_Shdr *symtab_hdr;
1342 struct elf_link_hash_entry **sym_hashes;
1343 bfd_signed_vma *local_got_refcounts;
1344 const Elf_Internal_Rela *rel, *relend;
1345
1346 if (bfd_link_relocatable (info))
1347 return TRUE;
1348
1349 htab = elf_s390_hash_table (info);
1350 if (htab == NULL)
1351 return FALSE;
1352
1353 elf_section_data (sec)->local_dynrel = NULL;
1354
1355 symtab_hdr = &elf_symtab_hdr (abfd);
1356 sym_hashes = elf_sym_hashes (abfd);
1357 local_got_refcounts = elf_local_got_refcounts (abfd);
1358
1359 relend = relocs + sec->reloc_count;
1360 for (rel = relocs; rel < relend; rel++)
1361 {
1362 unsigned long r_symndx;
1363 unsigned int r_type;
1364 struct elf_link_hash_entry *h = NULL;
1365
1366 r_symndx = ELF64_R_SYM (rel->r_info);
1367 if (r_symndx >= symtab_hdr->sh_info)
1368 {
1369 struct elf_s390_link_hash_entry *eh;
1370 struct elf_dyn_relocs **pp;
1371 struct elf_dyn_relocs *p;
1372
1373 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1374 while (h->root.type == bfd_link_hash_indirect
1375 || h->root.type == bfd_link_hash_warning)
1376 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1377 eh = (struct elf_s390_link_hash_entry *) h;
1378
1379 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1380 if (p->sec == sec)
1381 {
1382 /* Everything must go for SEC. */
1383 *pp = p->next;
1384 break;
1385 }
1386 }
1387 else
1388 {
1389 Elf_Internal_Sym *isym;
1390
1391 /* A local symbol. */
1392 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1393 abfd, r_symndx);
1394 if (isym == NULL)
1395 return FALSE;
1396
1397 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1398 {
1399 struct plt_entry *plt = elf_s390_local_plt (abfd);
1400 if (plt[r_symndx].plt.refcount > 0)
1401 plt[r_symndx].plt.refcount--;
1402 }
1403 }
1404
1405 r_type = ELF64_R_TYPE (rel->r_info);
1406 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1407 switch (r_type)
1408 {
1409 case R_390_TLS_LDM64:
1410 if (htab->tls_ldm_got.refcount > 0)
1411 htab->tls_ldm_got.refcount -= 1;
1412 break;
1413 case R_390_GOTOFF16:
1414 case R_390_GOTOFF32:
1415 case R_390_GOTOFF64:
1416 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1417 {
1418 h->plt.refcount--;
1419 break;
1420 }
1421
1422 case R_390_GOTPC:
1423 case R_390_GOTPCDBL:
1424 break;
1425
1426 case R_390_TLS_GD64:
1427 case R_390_TLS_IE64:
1428 case R_390_TLS_GOTIE12:
1429 case R_390_TLS_GOTIE20:
1430 case R_390_TLS_GOTIE64:
1431 case R_390_TLS_IEENT:
1432 case R_390_GOT12:
1433 case R_390_GOT16:
1434 case R_390_GOT20:
1435 case R_390_GOT32:
1436 case R_390_GOT64:
1437 case R_390_GOTENT:
1438 if (h != NULL)
1439 {
1440 if (h->got.refcount > 0)
1441 h->got.refcount -= 1;
1442 }
1443 else if (local_got_refcounts != NULL)
1444 {
1445 if (local_got_refcounts[r_symndx] > 0)
1446 local_got_refcounts[r_symndx] -= 1;
1447 }
1448 break;
1449
1450 case R_390_8:
1451 case R_390_12:
1452 case R_390_16:
1453 case R_390_20:
1454 case R_390_32:
1455 case R_390_64:
1456 case R_390_PC16:
1457 case R_390_PC12DBL:
1458 case R_390_PC16DBL:
1459 case R_390_PC24DBL:
1460 case R_390_PC32:
1461 case R_390_PC32DBL:
1462 case R_390_PC64:
1463 if (bfd_link_pic (info))
1464 break;
1465 /* Fall through */
1466
1467 case R_390_PLT12DBL:
1468 case R_390_PLT16DBL:
1469 case R_390_PLT24DBL:
1470 case R_390_PLT32:
1471 case R_390_PLT32DBL:
1472 case R_390_PLT64:
1473 case R_390_PLTOFF16:
1474 case R_390_PLTOFF32:
1475 case R_390_PLTOFF64:
1476 if (h != NULL)
1477 {
1478 if (h->plt.refcount > 0)
1479 h->plt.refcount -= 1;
1480 }
1481 break;
1482
1483 case R_390_GOTPLT12:
1484 case R_390_GOTPLT16:
1485 case R_390_GOTPLT20:
1486 case R_390_GOTPLT32:
1487 case R_390_GOTPLT64:
1488 case R_390_GOTPLTENT:
1489 if (h != NULL)
1490 {
1491 if (h->plt.refcount > 0)
1492 {
1493 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1494 h->plt.refcount -= 1;
1495 }
1496 }
1497 else if (local_got_refcounts != NULL)
1498 {
1499 if (local_got_refcounts[r_symndx] > 0)
1500 local_got_refcounts[r_symndx] -= 1;
1501 }
1502 break;
1503
1504 default:
1505 break;
1506 }
1507 }
1508
1509 return TRUE;
1510 }
1511
1512 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1513 entry but we found we will not create any. Called when we find we will
1514 not have any PLT for this symbol, by for example
1515 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1516 or elf_s390_size_dynamic_sections if no dynamic sections will be
1517 created (we're only linking static objects). */
1518
1519 static void
1520 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1521 {
1522 if (h->elf.root.type == bfd_link_hash_warning)
1523 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1524
1525 if (h->gotplt_refcount <= 0)
1526 return;
1527
1528 /* We simply add the number of gotplt references to the number
1529 * of got references for this symbol. */
1530 h->elf.got.refcount += h->gotplt_refcount;
1531 h->gotplt_refcount = -1;
1532 }
1533
1534 /* Adjust a symbol defined by a dynamic object and referenced by a
1535 regular object. The current definition is in some section of the
1536 dynamic object, but we're not including those sections. We have to
1537 change the definition to something the rest of the link can
1538 understand. */
1539
1540 static bfd_boolean
1541 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1542 struct elf_link_hash_entry *h)
1543 {
1544 struct elf_s390_link_hash_table *htab;
1545 asection *s, *srel;
1546
1547 /* STT_GNU_IFUNC symbol must go through PLT. */
1548 if (s390_is_ifunc_symbol_p (h))
1549 {
1550 /* All local STT_GNU_IFUNC references must be treated as local
1551 calls via local PLT. */
1552 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1553 {
1554 bfd_size_type pc_count = 0, count = 0;
1555 struct elf_dyn_relocs **pp;
1556 struct elf_s390_link_hash_entry *eh;
1557 struct elf_dyn_relocs *p;
1558
1559 eh = (struct elf_s390_link_hash_entry *) h;
1560 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1561 {
1562 pc_count += p->pc_count;
1563 p->count -= p->pc_count;
1564 p->pc_count = 0;
1565 count += p->count;
1566 if (p->count == 0)
1567 *pp = p->next;
1568 else
1569 pp = &p->next;
1570 }
1571
1572 if (pc_count || count)
1573 {
1574 h->needs_plt = 1;
1575 h->non_got_ref = 1;
1576 if (h->plt.refcount <= 0)
1577 h->plt.refcount = 1;
1578 else
1579 h->plt.refcount += 1;
1580 }
1581 }
1582
1583 if (h->plt.refcount <= 0)
1584 {
1585 h->plt.offset = (bfd_vma) -1;
1586 h->needs_plt = 0;
1587 }
1588 return TRUE;
1589 }
1590
1591 /* If this is a function, put it in the procedure linkage table. We
1592 will fill in the contents of the procedure linkage table later
1593 (although we could actually do it here). */
1594 if (h->type == STT_FUNC
1595 || h->needs_plt)
1596 {
1597 if (h->plt.refcount <= 0
1598 || SYMBOL_CALLS_LOCAL (info, h)
1599 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1600 && h->root.type == bfd_link_hash_undefweak))
1601 {
1602 /* This case can occur if we saw a PLT32 reloc in an input
1603 file, but the symbol was never referred to by a dynamic
1604 object, or if all references were garbage collected. In
1605 such a case, we don't actually need to build a procedure
1606 linkage table, and we can just do a PC32 reloc instead. */
1607 h->plt.offset = (bfd_vma) -1;
1608 h->needs_plt = 0;
1609 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1610 }
1611
1612 return TRUE;
1613 }
1614 else
1615 /* It's possible that we incorrectly decided a .plt reloc was
1616 needed for an R_390_PC32 reloc to a non-function sym in
1617 check_relocs. We can't decide accurately between function and
1618 non-function syms in check-relocs; Objects loaded later in
1619 the link may change h->type. So fix it now. */
1620 h->plt.offset = (bfd_vma) -1;
1621
1622 /* If this is a weak symbol, and there is a real definition, the
1623 processor independent code will have arranged for us to see the
1624 real definition first, and we can just use the same value. */
1625 if (h->u.weakdef != NULL)
1626 {
1627 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1628 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1629 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1630 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1631 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1632 h->non_got_ref = h->u.weakdef->non_got_ref;
1633 return TRUE;
1634 }
1635
1636 /* This is a reference to a symbol defined by a dynamic object which
1637 is not a function. */
1638
1639 /* If we are creating a shared library, we must presume that the
1640 only references to the symbol are via the global offset table.
1641 For such cases we need not do anything here; the relocations will
1642 be handled correctly by relocate_section. */
1643 if (bfd_link_pic (info))
1644 return TRUE;
1645
1646 /* If there are no references to this symbol that do not use the
1647 GOT, we don't need to generate a copy reloc. */
1648 if (!h->non_got_ref)
1649 return TRUE;
1650
1651 /* If -z nocopyreloc was given, we won't generate them either. */
1652 if (info->nocopyreloc)
1653 {
1654 h->non_got_ref = 0;
1655 return TRUE;
1656 }
1657
1658 if (ELIMINATE_COPY_RELOCS)
1659 {
1660 struct elf_s390_link_hash_entry * eh;
1661 struct elf_dyn_relocs *p;
1662
1663 eh = (struct elf_s390_link_hash_entry *) h;
1664 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1665 {
1666 s = p->sec->output_section;
1667 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1668 break;
1669 }
1670
1671 /* If we didn't find any dynamic relocs in read-only sections, then
1672 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1673 if (p == NULL)
1674 {
1675 h->non_got_ref = 0;
1676 return TRUE;
1677 }
1678 }
1679
1680 /* We must allocate the symbol in our .dynbss section, which will
1681 become part of the .bss section of the executable. There will be
1682 an entry for this symbol in the .dynsym section. The dynamic
1683 object will contain position independent code, so all references
1684 from the dynamic object to this symbol will go through the global
1685 offset table. The dynamic linker will use the .dynsym entry to
1686 determine the address it must put in the global offset table, so
1687 both the dynamic object and the regular object will refer to the
1688 same memory location for the variable. */
1689
1690 htab = elf_s390_hash_table (info);
1691 if (htab == NULL)
1692 return FALSE;
1693
1694 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1695 copy the initial value out of the dynamic object and into the
1696 runtime process image. */
1697 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1698 {
1699 s = htab->elf.sdynrelro;
1700 srel = htab->elf.sreldynrelro;
1701 }
1702 else
1703 {
1704 s = htab->elf.sdynbss;
1705 srel = htab->elf.srelbss;
1706 }
1707 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1708 {
1709 srel->size += sizeof (Elf64_External_Rela);
1710 h->needs_copy = 1;
1711 }
1712
1713 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1714 }
1715
1716 /* Allocate space in .plt, .got and associated reloc sections for
1717 dynamic relocs. */
1718
1719 static bfd_boolean
1720 allocate_dynrelocs (struct elf_link_hash_entry *h,
1721 void * inf)
1722 {
1723 struct bfd_link_info *info;
1724 struct elf_s390_link_hash_table *htab;
1725 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1726 struct elf_dyn_relocs *p;
1727
1728 if (h->root.type == bfd_link_hash_indirect)
1729 return TRUE;
1730
1731 info = (struct bfd_link_info *) inf;
1732 htab = elf_s390_hash_table (info);
1733 if (htab == NULL)
1734 return FALSE;
1735
1736 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1737 here if it is defined and referenced in a non-shared object. */
1738 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1739 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1740 else if (htab->elf.dynamic_sections_created
1741 && h->plt.refcount > 0)
1742 {
1743 /* Make sure this symbol is output as a dynamic symbol.
1744 Undefined weak syms won't yet be marked as dynamic. */
1745 if (h->dynindx == -1
1746 && !h->forced_local)
1747 {
1748 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1749 return FALSE;
1750 }
1751
1752 if (bfd_link_pic (info)
1753 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1754 {
1755 asection *s = htab->elf.splt;
1756
1757 /* If this is the first .plt entry, make room for the special
1758 first entry. */
1759 if (s->size == 0)
1760 s->size += PLT_FIRST_ENTRY_SIZE;
1761
1762 h->plt.offset = s->size;
1763
1764 /* If this symbol is not defined in a regular file, and we are
1765 not generating a shared library, then set the symbol to this
1766 location in the .plt. This is required to make function
1767 pointers compare as equal between the normal executable and
1768 the shared library. */
1769 if (! bfd_link_pic (info)
1770 && !h->def_regular)
1771 {
1772 h->root.u.def.section = s;
1773 h->root.u.def.value = h->plt.offset;
1774 }
1775
1776 /* Make room for this entry. */
1777 s->size += PLT_ENTRY_SIZE;
1778
1779 /* We also need to make an entry in the .got.plt section, which
1780 will be placed in the .got section by the linker script. */
1781 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1782
1783 /* We also need to make an entry in the .rela.plt section. */
1784 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1785 }
1786 else
1787 {
1788 h->plt.offset = (bfd_vma) -1;
1789 h->needs_plt = 0;
1790 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1791 }
1792 }
1793 else
1794 {
1795 h->plt.offset = (bfd_vma) -1;
1796 h->needs_plt = 0;
1797 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1798 }
1799
1800 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1801 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1802 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1803 we can save the dynamic TLS relocation. */
1804 if (h->got.refcount > 0
1805 && !bfd_link_pic (info)
1806 && h->dynindx == -1
1807 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1808 {
1809 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1810 /* For the GOTIE access without a literal pool entry the offset has
1811 to be stored somewhere. The immediate value in the instruction
1812 is not bit enough so the value is stored in the got. */
1813 {
1814 h->got.offset = htab->elf.sgot->size;
1815 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1816 }
1817 else
1818 h->got.offset = (bfd_vma) -1;
1819 }
1820 else if (h->got.refcount > 0)
1821 {
1822 asection *s;
1823 bfd_boolean dyn;
1824 int tls_type = elf_s390_hash_entry(h)->tls_type;
1825
1826 /* Make sure this symbol is output as a dynamic symbol.
1827 Undefined weak syms won't yet be marked as dynamic. */
1828 if (h->dynindx == -1
1829 && !h->forced_local)
1830 {
1831 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1832 return FALSE;
1833 }
1834
1835 s = htab->elf.sgot;
1836 h->got.offset = s->size;
1837 s->size += GOT_ENTRY_SIZE;
1838 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1839 if (tls_type == GOT_TLS_GD)
1840 s->size += GOT_ENTRY_SIZE;
1841 dyn = htab->elf.dynamic_sections_created;
1842 /* R_390_TLS_IE64 needs one dynamic relocation,
1843 R_390_TLS_GD64 needs one if local symbol and two if global. */
1844 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1845 || tls_type >= GOT_TLS_IE)
1846 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1847 else if (tls_type == GOT_TLS_GD)
1848 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1849 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1850 || h->root.type != bfd_link_hash_undefweak)
1851 && (bfd_link_pic (info)
1852 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1853 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1854 }
1855 else
1856 h->got.offset = (bfd_vma) -1;
1857
1858 if (eh->dyn_relocs == NULL)
1859 return TRUE;
1860
1861 /* In the shared -Bsymbolic case, discard space allocated for
1862 dynamic pc-relative relocs against symbols which turn out to be
1863 defined in regular objects. For the normal shared case, discard
1864 space for pc-relative relocs that have become local due to symbol
1865 visibility changes. */
1866
1867 if (bfd_link_pic (info))
1868 {
1869 if (SYMBOL_CALLS_LOCAL (info, h))
1870 {
1871 struct elf_dyn_relocs **pp;
1872
1873 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1874 {
1875 p->count -= p->pc_count;
1876 p->pc_count = 0;
1877 if (p->count == 0)
1878 *pp = p->next;
1879 else
1880 pp = &p->next;
1881 }
1882 }
1883
1884 /* Also discard relocs on undefined weak syms with non-default
1885 visibility. */
1886 if (eh->dyn_relocs != NULL
1887 && h->root.type == bfd_link_hash_undefweak)
1888 {
1889 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1890 eh->dyn_relocs = NULL;
1891
1892 /* Make sure undefined weak symbols are output as a dynamic
1893 symbol in PIEs. */
1894 else if (h->dynindx == -1
1895 && !h->forced_local)
1896 {
1897 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1898 return FALSE;
1899 }
1900 }
1901 }
1902 else if (ELIMINATE_COPY_RELOCS)
1903 {
1904 /* For the non-shared case, discard space for relocs against
1905 symbols which turn out to need copy relocs or are not
1906 dynamic. */
1907
1908 if (!h->non_got_ref
1909 && ((h->def_dynamic
1910 && !h->def_regular)
1911 || (htab->elf.dynamic_sections_created
1912 && (h->root.type == bfd_link_hash_undefweak
1913 || h->root.type == bfd_link_hash_undefined))))
1914 {
1915 /* Make sure this symbol is output as a dynamic symbol.
1916 Undefined weak syms won't yet be marked as dynamic. */
1917 if (h->dynindx == -1
1918 && !h->forced_local)
1919 {
1920 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1921 return FALSE;
1922 }
1923
1924 /* If that succeeded, we know we'll be keeping all the
1925 relocs. */
1926 if (h->dynindx != -1)
1927 goto keep;
1928 }
1929
1930 eh->dyn_relocs = NULL;
1931
1932 keep: ;
1933 }
1934
1935 /* Finally, allocate space. */
1936 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1937 {
1938 asection *sreloc = elf_section_data (p->sec)->sreloc;
1939 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1940 }
1941
1942 return TRUE;
1943 }
1944
1945 /* Find any dynamic relocs that apply to read-only sections. */
1946
1947 static bfd_boolean
1948 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1949 {
1950 struct elf_s390_link_hash_entry *eh;
1951 struct elf_dyn_relocs *p;
1952
1953 eh = (struct elf_s390_link_hash_entry *) h;
1954 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1955 {
1956 asection *s = p->sec->output_section;
1957
1958 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1959 {
1960 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1961
1962 info->flags |= DF_TEXTREL;
1963
1964 /* Not an error, just cut short the traversal. */
1965 return FALSE;
1966 }
1967 }
1968 return TRUE;
1969 }
1970
1971 /* Set the sizes of the dynamic sections. */
1972
1973 static bfd_boolean
1974 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1975 struct bfd_link_info *info)
1976 {
1977 struct elf_s390_link_hash_table *htab;
1978 bfd *dynobj;
1979 asection *s;
1980 bfd_boolean relocs;
1981 bfd *ibfd;
1982
1983 htab = elf_s390_hash_table (info);
1984 if (htab == NULL)
1985 return FALSE;
1986
1987 dynobj = htab->elf.dynobj;
1988 if (dynobj == NULL)
1989 abort ();
1990
1991 if (htab->elf.dynamic_sections_created)
1992 {
1993 /* Set the contents of the .interp section to the interpreter. */
1994 if (bfd_link_executable (info) && !info->nointerp)
1995 {
1996 s = bfd_get_linker_section (dynobj, ".interp");
1997 if (s == NULL)
1998 abort ();
1999 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2000 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2001 }
2002 }
2003
2004 /* Set up .got offsets for local syms, and space for local dynamic
2005 relocs. */
2006 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2007 {
2008 bfd_signed_vma *local_got;
2009 bfd_signed_vma *end_local_got;
2010 char *local_tls_type;
2011 bfd_size_type locsymcount;
2012 Elf_Internal_Shdr *symtab_hdr;
2013 asection *srela;
2014 struct plt_entry *local_plt;
2015 unsigned int i;
2016
2017 if (! is_s390_elf (ibfd))
2018 continue;
2019
2020 for (s = ibfd->sections; s != NULL; s = s->next)
2021 {
2022 struct elf_dyn_relocs *p;
2023
2024 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2025 {
2026 if (!bfd_is_abs_section (p->sec)
2027 && bfd_is_abs_section (p->sec->output_section))
2028 {
2029 /* Input section has been discarded, either because
2030 it is a copy of a linkonce section or due to
2031 linker script /DISCARD/, so we'll be discarding
2032 the relocs too. */
2033 }
2034 else if (p->count != 0)
2035 {
2036 srela = elf_section_data (p->sec)->sreloc;
2037 srela->size += p->count * sizeof (Elf64_External_Rela);
2038 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2039 info->flags |= DF_TEXTREL;
2040 }
2041 }
2042 }
2043
2044 local_got = elf_local_got_refcounts (ibfd);
2045 if (!local_got)
2046 continue;
2047
2048 symtab_hdr = &elf_symtab_hdr (ibfd);
2049 locsymcount = symtab_hdr->sh_info;
2050 end_local_got = local_got + locsymcount;
2051 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2052 s = htab->elf.sgot;
2053 srela = htab->elf.srelgot;
2054 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2055 {
2056 if (*local_got > 0)
2057 {
2058 *local_got = s->size;
2059 s->size += GOT_ENTRY_SIZE;
2060 if (*local_tls_type == GOT_TLS_GD)
2061 s->size += GOT_ENTRY_SIZE;
2062 if (bfd_link_pic (info))
2063 srela->size += sizeof (Elf64_External_Rela);
2064 }
2065 else
2066 *local_got = (bfd_vma) -1;
2067 }
2068
2069 local_plt = elf_s390_local_plt (ibfd);
2070 for (i = 0; i < symtab_hdr->sh_info; i++)
2071 {
2072 if (local_plt[i].plt.refcount > 0)
2073 {
2074 local_plt[i].plt.offset = htab->elf.iplt->size;
2075 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2076 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2077 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2078 }
2079 else
2080 local_plt[i].plt.offset = (bfd_vma) -1;
2081 }
2082 }
2083
2084 if (htab->tls_ldm_got.refcount > 0)
2085 {
2086 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2087 relocs. */
2088 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2089 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2090 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2091 }
2092 else
2093 htab->tls_ldm_got.offset = -1;
2094
2095 /* Allocate global sym .plt and .got entries, and space for global
2096 sym dynamic relocs. */
2097 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2098
2099 /* We now have determined the sizes of the various dynamic sections.
2100 Allocate memory for them. */
2101 relocs = FALSE;
2102 for (s = dynobj->sections; s != NULL; s = s->next)
2103 {
2104 if ((s->flags & SEC_LINKER_CREATED) == 0)
2105 continue;
2106
2107 if (s == htab->elf.splt
2108 || s == htab->elf.sgot
2109 || s == htab->elf.sgotplt
2110 || s == htab->elf.sdynbss
2111 || s == htab->elf.sdynrelro
2112 || s == htab->elf.iplt
2113 || s == htab->elf.igotplt
2114 || s == htab->irelifunc)
2115 {
2116 /* Strip this section if we don't need it; see the
2117 comment below. */
2118 }
2119 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2120 {
2121 if (s->size != 0 && s != htab->elf.srelplt)
2122 relocs = TRUE;
2123
2124 /* We use the reloc_count field as a counter if we need
2125 to copy relocs into the output file. */
2126 s->reloc_count = 0;
2127 }
2128 else
2129 {
2130 /* It's not one of our sections, so don't allocate space. */
2131 continue;
2132 }
2133
2134 if (s->size == 0)
2135 {
2136 /* If we don't need this section, strip it from the
2137 output file. This is to handle .rela.bss and
2138 .rela.plt. We must create it in
2139 create_dynamic_sections, because it must be created
2140 before the linker maps input sections to output
2141 sections. The linker does that before
2142 adjust_dynamic_symbol is called, and it is that
2143 function which decides whether anything needs to go
2144 into these sections. */
2145
2146 s->flags |= SEC_EXCLUDE;
2147 continue;
2148 }
2149
2150 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2151 continue;
2152
2153 /* Allocate memory for the section contents. We use bfd_zalloc
2154 here in case unused entries are not reclaimed before the
2155 section's contents are written out. This should not happen,
2156 but this way if it does, we get a R_390_NONE reloc instead
2157 of garbage. */
2158 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2159 if (s->contents == NULL)
2160 return FALSE;
2161 }
2162
2163 if (htab->elf.dynamic_sections_created)
2164 {
2165 /* Add some entries to the .dynamic section. We fill in the
2166 values later, in elf_s390_finish_dynamic_sections, but we
2167 must add the entries now so that we get the correct size for
2168 the .dynamic section. The DT_DEBUG entry is filled in by the
2169 dynamic linker and used by the debugger. */
2170 #define add_dynamic_entry(TAG, VAL) \
2171 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2172
2173 if (bfd_link_executable (info))
2174 {
2175 if (!add_dynamic_entry (DT_DEBUG, 0))
2176 return FALSE;
2177 }
2178
2179 if (htab->elf.splt->size != 0)
2180 {
2181 if (!add_dynamic_entry (DT_PLTGOT, 0)
2182 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2183 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2184 || !add_dynamic_entry (DT_JMPREL, 0))
2185 return FALSE;
2186 }
2187
2188 if (relocs)
2189 {
2190 if (!add_dynamic_entry (DT_RELA, 0)
2191 || !add_dynamic_entry (DT_RELASZ, 0)
2192 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2193 return FALSE;
2194
2195 /* If any dynamic relocs apply to a read-only section,
2196 then we need a DT_TEXTREL entry. */
2197 if ((info->flags & DF_TEXTREL) == 0)
2198 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2199 info);
2200
2201 if ((info->flags & DF_TEXTREL) != 0)
2202 {
2203 if (!add_dynamic_entry (DT_TEXTREL, 0))
2204 return FALSE;
2205 }
2206 }
2207 }
2208 #undef add_dynamic_entry
2209
2210 return TRUE;
2211 }
2212
2213 /* Return the base VMA address which should be subtracted from real addresses
2214 when resolving @dtpoff relocation.
2215 This is PT_TLS segment p_vaddr. */
2216
2217 static bfd_vma
2218 dtpoff_base (struct bfd_link_info *info)
2219 {
2220 /* If tls_sec is NULL, we should have signalled an error already. */
2221 if (elf_hash_table (info)->tls_sec == NULL)
2222 return 0;
2223 return elf_hash_table (info)->tls_sec->vma;
2224 }
2225
2226 /* Return the relocation value for @tpoff relocation
2227 if STT_TLS virtual address is ADDRESS. */
2228
2229 static bfd_vma
2230 tpoff (struct bfd_link_info *info, bfd_vma address)
2231 {
2232 struct elf_link_hash_table *htab = elf_hash_table (info);
2233
2234 /* If tls_sec is NULL, we should have signalled an error already. */
2235 if (htab->tls_sec == NULL)
2236 return 0;
2237 return htab->tls_size + htab->tls_sec->vma - address;
2238 }
2239
2240 /* Complain if TLS instruction relocation is against an invalid
2241 instruction. */
2242
2243 static void
2244 invalid_tls_insn (bfd *input_bfd,
2245 asection *input_section,
2246 Elf_Internal_Rela *rel)
2247 {
2248 reloc_howto_type *howto;
2249
2250 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2251 _bfd_error_handler
2252 /* xgettext:c-format */
2253 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2254 input_bfd,
2255 input_section,
2256 (long) rel->r_offset,
2257 howto->name);
2258 bfd_set_error (bfd_error_bad_value);
2259 }
2260
2261 /* Relocate a 390 ELF section. */
2262
2263 static bfd_boolean
2264 elf_s390_relocate_section (bfd *output_bfd,
2265 struct bfd_link_info *info,
2266 bfd *input_bfd,
2267 asection *input_section,
2268 bfd_byte *contents,
2269 Elf_Internal_Rela *relocs,
2270 Elf_Internal_Sym *local_syms,
2271 asection **local_sections)
2272 {
2273 struct elf_s390_link_hash_table *htab;
2274 Elf_Internal_Shdr *symtab_hdr;
2275 struct elf_link_hash_entry **sym_hashes;
2276 bfd_vma *local_got_offsets;
2277 Elf_Internal_Rela *rel;
2278 Elf_Internal_Rela *relend;
2279
2280 BFD_ASSERT (is_s390_elf (input_bfd));
2281
2282 htab = elf_s390_hash_table (info);
2283 if (htab == NULL)
2284 return FALSE;
2285
2286 symtab_hdr = &elf_symtab_hdr (input_bfd);
2287 sym_hashes = elf_sym_hashes (input_bfd);
2288 local_got_offsets = elf_local_got_offsets (input_bfd);
2289
2290 rel = relocs;
2291 relend = relocs + input_section->reloc_count;
2292 for (; rel < relend; rel++)
2293 {
2294 unsigned int r_type;
2295 reloc_howto_type *howto;
2296 unsigned long r_symndx;
2297 struct elf_link_hash_entry *h;
2298 Elf_Internal_Sym *sym;
2299 asection *sec;
2300 bfd_vma off;
2301 bfd_vma relocation;
2302 bfd_boolean unresolved_reloc;
2303 bfd_reloc_status_type r;
2304 int tls_type;
2305 asection *base_got = htab->elf.sgot;
2306
2307 r_type = ELF64_R_TYPE (rel->r_info);
2308 if (r_type == (int) R_390_GNU_VTINHERIT
2309 || r_type == (int) R_390_GNU_VTENTRY)
2310 continue;
2311 if (r_type >= (int) R_390_max)
2312 {
2313 bfd_set_error (bfd_error_bad_value);
2314 return FALSE;
2315 }
2316
2317 howto = elf_howto_table + r_type;
2318 r_symndx = ELF64_R_SYM (rel->r_info);
2319
2320 h = NULL;
2321 sym = NULL;
2322 sec = NULL;
2323 unresolved_reloc = FALSE;
2324 if (r_symndx < symtab_hdr->sh_info)
2325 {
2326 sym = local_syms + r_symndx;
2327 sec = local_sections[r_symndx];
2328
2329 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2330 {
2331 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2332 if (local_plt == NULL)
2333 return FALSE;
2334
2335 /* Address of the PLT slot. */
2336 relocation = (htab->elf.iplt->output_section->vma
2337 + htab->elf.iplt->output_offset
2338 + local_plt[r_symndx].plt.offset);
2339
2340 switch (r_type)
2341 {
2342 case R_390_PLTOFF16:
2343 case R_390_PLTOFF32:
2344 case R_390_PLTOFF64:
2345 relocation -= htab->elf.sgot->output_section->vma;
2346 break;
2347 case R_390_GOTPLT12:
2348 case R_390_GOTPLT16:
2349 case R_390_GOTPLT20:
2350 case R_390_GOTPLT32:
2351 case R_390_GOTPLT64:
2352 case R_390_GOTPLTENT:
2353 case R_390_GOT12:
2354 case R_390_GOT16:
2355 case R_390_GOT20:
2356 case R_390_GOT32:
2357 case R_390_GOT64:
2358 case R_390_GOTENT:
2359 {
2360 /* Write the PLT slot address into the GOT slot. */
2361 bfd_put_64 (output_bfd, relocation,
2362 htab->elf.sgot->contents +
2363 local_got_offsets[r_symndx]);
2364 relocation = (local_got_offsets[r_symndx] +
2365 htab->elf.sgot->output_offset);
2366
2367 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2368 relocation += htab->elf.sgot->output_section->vma;
2369 break;
2370 }
2371 default:
2372 break;
2373 }
2374 /* The output section is needed later in
2375 finish_dynamic_section when creating the dynamic
2376 relocation. */
2377 local_plt[r_symndx].sec = sec;
2378 goto do_relocation;
2379 }
2380 else
2381 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2382 }
2383 else
2384 {
2385 bfd_boolean warned ATTRIBUTE_UNUSED;
2386 bfd_boolean ignored ATTRIBUTE_UNUSED;
2387
2388 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2389 r_symndx, symtab_hdr, sym_hashes,
2390 h, sec, relocation,
2391 unresolved_reloc, warned, ignored);
2392 }
2393
2394 if (sec != NULL && discarded_section (sec))
2395 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2396 rel, 1, relend, howto, 0, contents);
2397
2398 if (bfd_link_relocatable (info))
2399 continue;
2400
2401 switch (r_type)
2402 {
2403 case R_390_GOTPLT12:
2404 case R_390_GOTPLT16:
2405 case R_390_GOTPLT20:
2406 case R_390_GOTPLT32:
2407 case R_390_GOTPLT64:
2408 case R_390_GOTPLTENT:
2409 /* There are three cases for a GOTPLT relocation. 1) The
2410 relocation is against the jump slot entry of a plt that
2411 will get emitted to the output file. 2) The relocation
2412 is against the jump slot of a plt entry that has been
2413 removed. elf_s390_adjust_gotplt has created a GOT entry
2414 as replacement. 3) The relocation is against a local symbol.
2415 Cases 2) and 3) are the same as the GOT relocation code
2416 so we just have to test for case 1 and fall through for
2417 the other two. */
2418 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2419 {
2420 bfd_vma plt_index;
2421
2422 if (s390_is_ifunc_symbol_p (h))
2423 {
2424 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2425 relocation = (plt_index * GOT_ENTRY_SIZE +
2426 htab->elf.igotplt->output_offset);
2427 if (r_type == R_390_GOTPLTENT)
2428 relocation += htab->elf.igotplt->output_section->vma;
2429 }
2430 else
2431 {
2432 /* Calc. index no.
2433 Current offset - size first entry / entry size. */
2434 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2435 PLT_ENTRY_SIZE;
2436
2437 /* Offset in GOT is PLT index plus GOT headers(3)
2438 times 8, addr & GOT addr. */
2439 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2440 if (r_type == R_390_GOTPLTENT)
2441 relocation += htab->elf.sgot->output_section->vma;
2442 }
2443 unresolved_reloc = FALSE;
2444 break;
2445 }
2446 /* Fall through. */
2447
2448 case R_390_GOT12:
2449 case R_390_GOT16:
2450 case R_390_GOT20:
2451 case R_390_GOT32:
2452 case R_390_GOT64:
2453 case R_390_GOTENT:
2454 /* Relocation is to the entry for this symbol in the global
2455 offset table. */
2456 if (base_got == NULL)
2457 abort ();
2458
2459 if (h != NULL)
2460 {
2461 bfd_boolean dyn;
2462
2463 off = h->got.offset;
2464 dyn = htab->elf.dynamic_sections_created;
2465
2466 if (s390_is_ifunc_symbol_p (h))
2467 {
2468 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2469 if (off == (bfd_vma)-1)
2470 {
2471 /* No explicit GOT usage so redirect to the
2472 got.iplt slot. */
2473 base_got = htab->elf.igotplt;
2474 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2475 }
2476 else
2477 {
2478 /* Explicit GOT slots must contain the address
2479 of the PLT slot. This will be handled in
2480 finish_dynamic_symbol. */
2481 }
2482 }
2483 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2484 bfd_link_pic (info),
2485 h)
2486 || (bfd_link_pic (info)
2487 && SYMBOL_REFERENCES_LOCAL (info, h))
2488 || (ELF_ST_VISIBILITY (h->other)
2489 && h->root.type == bfd_link_hash_undefweak))
2490 {
2491 /* This is actually a static link, or it is a
2492 -Bsymbolic link and the symbol is defined
2493 locally, or the symbol was forced to be local
2494 because of a version file. We must initialize
2495 this entry in the global offset table. Since the
2496 offset must always be a multiple of 2, we use the
2497 least significant bit to record whether we have
2498 initialized it already.
2499
2500 When doing a dynamic link, we create a .rel.got
2501 relocation entry to initialize the value. This
2502 is done in the finish_dynamic_symbol routine. */
2503 if ((off & 1) != 0)
2504 off &= ~1;
2505 else
2506 {
2507 bfd_put_64 (output_bfd, relocation,
2508 base_got->contents + off);
2509 h->got.offset |= 1;
2510 }
2511
2512 if ((h->def_regular
2513 && bfd_link_pic (info)
2514 && SYMBOL_REFERENCES_LOCAL (info, h))
2515 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2516 && ((r_type == R_390_GOTENT
2517 && (bfd_get_16 (input_bfd,
2518 contents + rel->r_offset - 2)
2519 & 0xff0f) == 0xc408)
2520 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2521 || (r_type == R_390_GOT20
2522 && (bfd_get_32 (input_bfd,
2523 contents + rel->r_offset - 2)
2524 & 0xff00f000) == 0xe300c000
2525 && bfd_get_8 (input_bfd,
2526 contents + rel->r_offset + 3) == 0x04)))
2527
2528 {
2529 unsigned short new_insn =
2530 (0xc000 | (bfd_get_8 (input_bfd,
2531 contents + rel->r_offset - 1) & 0xf0));
2532 bfd_put_16 (output_bfd, new_insn,
2533 contents + rel->r_offset - 2);
2534 r_type = R_390_PC32DBL;
2535 rel->r_addend = 2;
2536 howto = elf_howto_table + r_type;
2537 relocation = h->root.u.def.value
2538 + h->root.u.def.section->output_section->vma
2539 + h->root.u.def.section->output_offset;
2540 goto do_relocation;
2541 }
2542 }
2543 else
2544 unresolved_reloc = FALSE;
2545 }
2546 else
2547 {
2548 if (local_got_offsets == NULL)
2549 abort ();
2550
2551 off = local_got_offsets[r_symndx];
2552
2553 /* The offset must always be a multiple of 8. We use
2554 the least significant bit to record whether we have
2555 already generated the necessary reloc. */
2556 if ((off & 1) != 0)
2557 off &= ~1;
2558 else
2559 {
2560 bfd_put_64 (output_bfd, relocation,
2561 htab->elf.sgot->contents + off);
2562
2563 if (bfd_link_pic (info))
2564 {
2565 asection *s;
2566 Elf_Internal_Rela outrel;
2567 bfd_byte *loc;
2568
2569 s = htab->elf.srelgot;
2570 if (s == NULL)
2571 abort ();
2572
2573 outrel.r_offset = (htab->elf.sgot->output_section->vma
2574 + htab->elf.sgot->output_offset
2575 + off);
2576 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2577 outrel.r_addend = relocation;
2578 loc = s->contents;
2579 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2580 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2581 }
2582
2583 local_got_offsets[r_symndx] |= 1;
2584 }
2585 }
2586
2587 if (off >= (bfd_vma) -2)
2588 abort ();
2589
2590 relocation = base_got->output_offset + off;
2591
2592 /* For @GOTENT the relocation is against the offset between
2593 the instruction and the symbols entry in the GOT and not
2594 between the start of the GOT and the symbols entry. We
2595 add the vma of the GOT to get the correct value. */
2596 if ( r_type == R_390_GOTENT
2597 || r_type == R_390_GOTPLTENT)
2598 relocation += base_got->output_section->vma;
2599
2600 break;
2601
2602 case R_390_GOTOFF16:
2603 case R_390_GOTOFF32:
2604 case R_390_GOTOFF64:
2605 /* Relocation is relative to the start of the global offset
2606 table. */
2607
2608 if (h != NULL
2609 && s390_is_ifunc_symbol_p (h)
2610 && h->def_regular
2611 && !bfd_link_executable (info))
2612 {
2613 relocation = (htab->elf.iplt->output_section->vma
2614 + htab->elf.iplt->output_offset
2615 + h->plt.offset
2616 - htab->elf.sgot->output_section->vma);
2617 goto do_relocation;
2618 }
2619
2620 /* Note that sgot->output_offset is not involved in this
2621 calculation. We always want the start of .got. If we
2622 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2623 permitted by the ABI, we might have to change this
2624 calculation. */
2625 relocation -= htab->elf.sgot->output_section->vma;
2626 break;
2627
2628 case R_390_GOTPC:
2629 case R_390_GOTPCDBL:
2630 /* Use global offset table as symbol value. */
2631 relocation = htab->elf.sgot->output_section->vma;
2632 unresolved_reloc = FALSE;
2633 break;
2634
2635 case R_390_PLT12DBL:
2636 case R_390_PLT16DBL:
2637 case R_390_PLT24DBL:
2638 case R_390_PLT32:
2639 case R_390_PLT32DBL:
2640 case R_390_PLT64:
2641 /* Relocation is to the entry for this symbol in the
2642 procedure linkage table. */
2643
2644 /* Resolve a PLT32 reloc against a local symbol directly,
2645 without using the procedure linkage table. */
2646 if (h == NULL)
2647 break;
2648
2649 if (h->plt.offset == (bfd_vma) -1
2650 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2651 {
2652 /* We didn't make a PLT entry for this symbol. This
2653 happens when statically linking PIC code, or when
2654 using -Bsymbolic. */
2655 break;
2656 }
2657 if (s390_is_ifunc_symbol_p (h))
2658 relocation = (htab->elf.iplt->output_section->vma
2659 + htab->elf.iplt->output_offset
2660 + h->plt.offset);
2661 else
2662 relocation = (htab->elf.splt->output_section->vma
2663 + htab->elf.splt->output_offset
2664 + h->plt.offset);
2665 unresolved_reloc = FALSE;
2666 break;
2667
2668 case R_390_PLTOFF16:
2669 case R_390_PLTOFF32:
2670 case R_390_PLTOFF64:
2671 /* Relocation is to the entry for this symbol in the
2672 procedure linkage table relative to the start of the GOT. */
2673
2674 /* For local symbols or if we didn't make a PLT entry for
2675 this symbol resolve the symbol directly. */
2676 if (h == NULL
2677 || h->plt.offset == (bfd_vma) -1
2678 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2679 {
2680 relocation -= htab->elf.sgot->output_section->vma;
2681 break;
2682 }
2683
2684 if (s390_is_ifunc_symbol_p (h))
2685 relocation = (htab->elf.iplt->output_section->vma
2686 + htab->elf.iplt->output_offset
2687 + h->plt.offset
2688 - htab->elf.sgot->output_section->vma);
2689 else
2690 relocation = (htab->elf.splt->output_section->vma
2691 + htab->elf.splt->output_offset
2692 + h->plt.offset
2693 - htab->elf.sgot->output_section->vma);
2694 unresolved_reloc = FALSE;
2695 break;
2696
2697 case R_390_PC16:
2698 case R_390_PC12DBL:
2699 case R_390_PC16DBL:
2700 case R_390_PC24DBL:
2701 case R_390_PC32:
2702 case R_390_PC32DBL:
2703 case R_390_PC64:
2704 /* The target of these relocs are instruction operands
2705 residing in read-only sections. We cannot emit a runtime
2706 reloc for it. */
2707 if (h != NULL
2708 && s390_is_ifunc_symbol_p (h)
2709 && h->def_regular
2710 && bfd_link_pic (info))
2711 {
2712 relocation = (htab->elf.iplt->output_section->vma
2713 + htab->elf.iplt->output_offset
2714 + h->plt.offset);
2715 goto do_relocation;
2716 }
2717 /* Fall through. */
2718
2719 case R_390_8:
2720 case R_390_16:
2721 case R_390_32:
2722 case R_390_64:
2723
2724 if (h != NULL
2725 && s390_is_ifunc_symbol_p (h)
2726 && h->def_regular)
2727 {
2728 if (!bfd_link_pic (info) || !h->non_got_ref)
2729 {
2730 /* For a non-shared object STT_GNU_IFUNC symbol must
2731 go through PLT. */
2732 relocation = (htab->elf.iplt->output_section->vma
2733 + htab->elf.iplt->output_offset
2734 + h ->plt.offset);
2735 goto do_relocation;
2736 }
2737 else
2738 {
2739 /* For shared objects a runtime relocation is needed. */
2740
2741 Elf_Internal_Rela outrel;
2742 asection *sreloc;
2743
2744 /* Need a dynamic relocation to get the real function
2745 address. */
2746 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2747 info,
2748 input_section,
2749 rel->r_offset);
2750 if (outrel.r_offset == (bfd_vma) -1
2751 || outrel.r_offset == (bfd_vma) -2)
2752 abort ();
2753
2754 outrel.r_offset += (input_section->output_section->vma
2755 + input_section->output_offset);
2756
2757 if (h->dynindx == -1
2758 || h->forced_local
2759 || bfd_link_executable (info))
2760 {
2761 /* This symbol is resolved locally. */
2762 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2763 outrel.r_addend = (h->root.u.def.value
2764 + h->root.u.def.section->output_section->vma
2765 + h->root.u.def.section->output_offset);
2766 }
2767 else
2768 {
2769 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2770 outrel.r_addend = 0;
2771 }
2772
2773 sreloc = htab->elf.irelifunc;
2774 elf_append_rela (output_bfd, sreloc, &outrel);
2775
2776 /* If this reloc is against an external symbol, we
2777 do not want to fiddle with the addend. Otherwise,
2778 we need to include the symbol value so that it
2779 becomes an addend for the dynamic reloc. For an
2780 internal symbol, we have updated addend. */
2781 continue;
2782 }
2783 }
2784
2785 if ((input_section->flags & SEC_ALLOC) == 0)
2786 break;
2787
2788 if ((bfd_link_pic (info)
2789 && (h == NULL
2790 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2791 || h->root.type != bfd_link_hash_undefweak)
2792 && ((r_type != R_390_PC16
2793 && r_type != R_390_PC12DBL
2794 && r_type != R_390_PC16DBL
2795 && r_type != R_390_PC24DBL
2796 && r_type != R_390_PC32
2797 && r_type != R_390_PC32DBL
2798 && r_type != R_390_PC64)
2799 || !SYMBOL_CALLS_LOCAL (info, h)))
2800 || (ELIMINATE_COPY_RELOCS
2801 && !bfd_link_pic (info)
2802 && h != NULL
2803 && h->dynindx != -1
2804 && !h->non_got_ref
2805 && ((h->def_dynamic
2806 && !h->def_regular)
2807 || h->root.type == bfd_link_hash_undefweak
2808 || h->root.type == bfd_link_hash_undefined)))
2809 {
2810 Elf_Internal_Rela outrel;
2811 bfd_boolean skip, relocate;
2812 asection *sreloc;
2813 bfd_byte *loc;
2814
2815 /* When generating a shared object, these relocations
2816 are copied into the output file to be resolved at run
2817 time. */
2818 skip = FALSE;
2819 relocate = FALSE;
2820
2821 outrel.r_offset =
2822 _bfd_elf_section_offset (output_bfd, info, input_section,
2823 rel->r_offset);
2824 if (outrel.r_offset == (bfd_vma) -1)
2825 skip = TRUE;
2826 else if (outrel.r_offset == (bfd_vma) -2)
2827 skip = TRUE, relocate = TRUE;
2828
2829 outrel.r_offset += (input_section->output_section->vma
2830 + input_section->output_offset);
2831
2832 if (skip)
2833 memset (&outrel, 0, sizeof outrel);
2834 else if (h != NULL
2835 && h->dynindx != -1
2836 && (r_type == R_390_PC16
2837 || r_type == R_390_PC12DBL
2838 || r_type == R_390_PC16DBL
2839 || r_type == R_390_PC24DBL
2840 || r_type == R_390_PC32
2841 || r_type == R_390_PC32DBL
2842 || r_type == R_390_PC64
2843 || !bfd_link_pic (info)
2844 || !SYMBOLIC_BIND (info, h)
2845 || !h->def_regular))
2846 {
2847 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2848 outrel.r_addend = rel->r_addend;
2849 }
2850 else
2851 {
2852 /* This symbol is local, or marked to become local. */
2853 outrel.r_addend = relocation + rel->r_addend;
2854 if (r_type == R_390_64)
2855 {
2856 relocate = TRUE;
2857 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2858 }
2859 else
2860 {
2861 long sindx;
2862
2863 if (bfd_is_abs_section (sec))
2864 sindx = 0;
2865 else if (sec == NULL || sec->owner == NULL)
2866 {
2867 bfd_set_error(bfd_error_bad_value);
2868 return FALSE;
2869 }
2870 else
2871 {
2872 asection *osec;
2873
2874 osec = sec->output_section;
2875 sindx = elf_section_data (osec)->dynindx;
2876
2877 if (sindx == 0)
2878 {
2879 osec = htab->elf.text_index_section;
2880 sindx = elf_section_data (osec)->dynindx;
2881 }
2882 BFD_ASSERT (sindx != 0);
2883
2884 /* We are turning this relocation into one
2885 against a section symbol, so subtract out
2886 the output section's address but not the
2887 offset of the input section in the output
2888 section. */
2889 outrel.r_addend -= osec->vma;
2890 }
2891 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2892 }
2893 }
2894
2895 sreloc = elf_section_data (input_section)->sreloc;
2896 if (sreloc == NULL)
2897 abort ();
2898
2899 loc = sreloc->contents;
2900 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2901 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2902
2903 /* If this reloc is against an external symbol, we do
2904 not want to fiddle with the addend. Otherwise, we
2905 need to include the symbol value so that it becomes
2906 an addend for the dynamic reloc. */
2907 if (! relocate)
2908 continue;
2909 }
2910
2911 break;
2912
2913 /* Relocations for tls literal pool entries. */
2914 case R_390_TLS_IE64:
2915 if (bfd_link_pic (info))
2916 {
2917 Elf_Internal_Rela outrel;
2918 asection *sreloc;
2919 bfd_byte *loc;
2920
2921 outrel.r_offset = rel->r_offset
2922 + input_section->output_section->vma
2923 + input_section->output_offset;
2924 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2925 sreloc = elf_section_data (input_section)->sreloc;
2926 if (sreloc == NULL)
2927 abort ();
2928 loc = sreloc->contents;
2929 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2930 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2931 }
2932 /* Fall through. */
2933
2934 case R_390_TLS_GD64:
2935 case R_390_TLS_GOTIE64:
2936 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2937 tls_type = GOT_UNKNOWN;
2938 if (h == NULL && local_got_offsets)
2939 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2940 else if (h != NULL)
2941 {
2942 tls_type = elf_s390_hash_entry(h)->tls_type;
2943 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2944 r_type = R_390_TLS_LE64;
2945 }
2946 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2947 r_type = R_390_TLS_IE64;
2948
2949 if (r_type == R_390_TLS_LE64)
2950 {
2951 /* This relocation gets optimized away by the local exec
2952 access optimization. */
2953 BFD_ASSERT (! unresolved_reloc);
2954 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2955 contents + rel->r_offset);
2956 continue;
2957 }
2958
2959 if (htab->elf.sgot == NULL)
2960 abort ();
2961
2962 if (h != NULL)
2963 off = h->got.offset;
2964 else
2965 {
2966 if (local_got_offsets == NULL)
2967 abort ();
2968
2969 off = local_got_offsets[r_symndx];
2970 }
2971
2972 emit_tls_relocs:
2973
2974 if ((off & 1) != 0)
2975 off &= ~1;
2976 else
2977 {
2978 Elf_Internal_Rela outrel;
2979 bfd_byte *loc;
2980 int dr_type, indx;
2981
2982 if (htab->elf.srelgot == NULL)
2983 abort ();
2984
2985 outrel.r_offset = (htab->elf.sgot->output_section->vma
2986 + htab->elf.sgot->output_offset + off);
2987
2988 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2989 if (r_type == R_390_TLS_GD64)
2990 dr_type = R_390_TLS_DTPMOD;
2991 else
2992 dr_type = R_390_TLS_TPOFF;
2993 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2994 outrel.r_addend = relocation - dtpoff_base (info);
2995 else
2996 outrel.r_addend = 0;
2997 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2998 loc = htab->elf.srelgot->contents;
2999 loc += htab->elf.srelgot->reloc_count++
3000 * sizeof (Elf64_External_Rela);
3001 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3002
3003 if (r_type == R_390_TLS_GD64)
3004 {
3005 if (indx == 0)
3006 {
3007 BFD_ASSERT (! unresolved_reloc);
3008 bfd_put_64 (output_bfd,
3009 relocation - dtpoff_base (info),
3010 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3011 }
3012 else
3013 {
3014 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
3015 outrel.r_offset += GOT_ENTRY_SIZE;
3016 outrel.r_addend = 0;
3017 htab->elf.srelgot->reloc_count++;
3018 loc += sizeof (Elf64_External_Rela);
3019 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3020 }
3021 }
3022
3023 if (h != NULL)
3024 h->got.offset |= 1;
3025 else
3026 local_got_offsets[r_symndx] |= 1;
3027 }
3028
3029 if (off >= (bfd_vma) -2)
3030 abort ();
3031 if (r_type == ELF64_R_TYPE (rel->r_info))
3032 {
3033 relocation = htab->elf.sgot->output_offset + off;
3034 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3035 relocation += htab->elf.sgot->output_section->vma;
3036 unresolved_reloc = FALSE;
3037 }
3038 else
3039 {
3040 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3041 contents + rel->r_offset);
3042 continue;
3043 }
3044 break;
3045
3046 case R_390_TLS_GOTIE12:
3047 case R_390_TLS_GOTIE20:
3048 case R_390_TLS_IEENT:
3049 if (h == NULL)
3050 {
3051 if (local_got_offsets == NULL)
3052 abort();
3053 off = local_got_offsets[r_symndx];
3054 if (bfd_link_pic (info))
3055 goto emit_tls_relocs;
3056 }
3057 else
3058 {
3059 off = h->got.offset;
3060 tls_type = elf_s390_hash_entry(h)->tls_type;
3061 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3062 goto emit_tls_relocs;
3063 }
3064
3065 if (htab->elf.sgot == NULL)
3066 abort ();
3067
3068 BFD_ASSERT (! unresolved_reloc);
3069 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3070 htab->elf.sgot->contents + off);
3071 relocation = htab->elf.sgot->output_offset + off;
3072 if (r_type == R_390_TLS_IEENT)
3073 relocation += htab->elf.sgot->output_section->vma;
3074 unresolved_reloc = FALSE;
3075 break;
3076
3077 case R_390_TLS_LDM64:
3078 if (! bfd_link_pic (info))
3079 /* The literal pool entry this relocation refers to gets ignored
3080 by the optimized code of the local exec model. Do nothing
3081 and the value will turn out zero. */
3082 continue;
3083
3084 if (htab->elf.sgot == NULL)
3085 abort ();
3086
3087 off = htab->tls_ldm_got.offset;
3088 if (off & 1)
3089 off &= ~1;
3090 else
3091 {
3092 Elf_Internal_Rela outrel;
3093 bfd_byte *loc;
3094
3095 if (htab->elf.srelgot == NULL)
3096 abort ();
3097
3098 outrel.r_offset = (htab->elf.sgot->output_section->vma
3099 + htab->elf.sgot->output_offset + off);
3100
3101 bfd_put_64 (output_bfd, 0,
3102 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3103 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3104 outrel.r_addend = 0;
3105 loc = htab->elf.srelgot->contents;
3106 loc += htab->elf.srelgot->reloc_count++
3107 * sizeof (Elf64_External_Rela);
3108 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3109 htab->tls_ldm_got.offset |= 1;
3110 }
3111 relocation = htab->elf.sgot->output_offset + off;
3112 unresolved_reloc = FALSE;
3113 break;
3114
3115 case R_390_TLS_LE64:
3116 if (bfd_link_dll (info))
3117 {
3118 /* Linking a shared library with non-fpic code requires
3119 a R_390_TLS_TPOFF relocation. */
3120 Elf_Internal_Rela outrel;
3121 asection *sreloc;
3122 bfd_byte *loc;
3123 int indx;
3124
3125 outrel.r_offset = rel->r_offset
3126 + input_section->output_section->vma
3127 + input_section->output_offset;
3128 if (h != NULL && h->dynindx != -1)
3129 indx = h->dynindx;
3130 else
3131 indx = 0;
3132 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3133 if (indx == 0)
3134 outrel.r_addend = relocation - dtpoff_base (info);
3135 else
3136 outrel.r_addend = 0;
3137 sreloc = elf_section_data (input_section)->sreloc;
3138 if (sreloc == NULL)
3139 abort ();
3140 loc = sreloc->contents;
3141 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3142 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3143 }
3144 else
3145 {
3146 BFD_ASSERT (! unresolved_reloc);
3147 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3148 contents + rel->r_offset);
3149 }
3150 continue;
3151
3152 case R_390_TLS_LDO64:
3153 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3154 relocation -= dtpoff_base (info);
3155 else
3156 /* When converting LDO to LE, we must negate. */
3157 relocation = -tpoff (info, relocation);
3158 break;
3159
3160 /* Relocations for tls instructions. */
3161 case R_390_TLS_LOAD:
3162 case R_390_TLS_GDCALL:
3163 case R_390_TLS_LDCALL:
3164 tls_type = GOT_UNKNOWN;
3165 if (h == NULL && local_got_offsets)
3166 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3167 else if (h != NULL)
3168 tls_type = elf_s390_hash_entry(h)->tls_type;
3169
3170 if (tls_type == GOT_TLS_GD)
3171 continue;
3172
3173 if (r_type == R_390_TLS_LOAD)
3174 {
3175 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3176 {
3177 /* IE->LE transition. Four valid cases:
3178 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3179 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3180 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3181 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3182 unsigned int insn0, insn1, ry;
3183
3184 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3185 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3186 if (insn1 != 0x0004)
3187 invalid_tls_insn (input_bfd, input_section, rel);
3188 ry = 0;
3189 if ((insn0 & 0xff00f000) == 0xe3000000)
3190 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3191 ry = (insn0 & 0x000f0000);
3192 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3193 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3194 ry = (insn0 & 0x0000f000) << 4;
3195 else if ((insn0 & 0xff00f000) == 0xe300c000)
3196 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3197 ry = (insn0 & 0x000f0000);
3198 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3199 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3200 ry = (insn0 & 0x0000f000) << 4;
3201 else
3202 invalid_tls_insn (input_bfd, input_section, rel);
3203 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3204 insn1 = 0x000d;
3205 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3206 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3207 }
3208 }
3209 else if (r_type == R_390_TLS_GDCALL)
3210 {
3211 unsigned int insn0, insn1;
3212
3213 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3214 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3215 if ((insn0 & 0xffff0000) != 0xc0e50000)
3216 invalid_tls_insn (input_bfd, input_section, rel);
3217 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3218 {
3219 /* GD->LE transition.
3220 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3221 insn0 = 0xc0040000;
3222 insn1 = 0x0000;
3223 }
3224 else
3225 {
3226 /* GD->IE transition.
3227 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3228 insn0 = 0xe322c000;
3229 insn1 = 0x0004;
3230 }
3231 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3232 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3233 }
3234 else if (r_type == R_390_TLS_LDCALL)
3235 {
3236 if (!bfd_link_pic (info))
3237 {
3238 unsigned int insn0, insn1;
3239
3240 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3241 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3242 if ((insn0 & 0xffff0000) != 0xc0e50000)
3243 invalid_tls_insn (input_bfd, input_section, rel);
3244 /* LD->LE transition.
3245 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3246 insn0 = 0xc0040000;
3247 insn1 = 0x0000;
3248 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3249 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3250 }
3251 }
3252 continue;
3253
3254 default:
3255 break;
3256 }
3257
3258 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3259 because such sections are not SEC_ALLOC and thus ld.so will
3260 not process them. */
3261 if (unresolved_reloc
3262 && !((input_section->flags & SEC_DEBUGGING) != 0
3263 && h->def_dynamic)
3264 && _bfd_elf_section_offset (output_bfd, info, input_section,
3265 rel->r_offset) != (bfd_vma) -1)
3266 _bfd_error_handler
3267 /* xgettext:c-format */
3268 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3269 input_bfd,
3270 input_section,
3271 (long) rel->r_offset,
3272 howto->name,
3273 h->root.root.string);
3274
3275 do_relocation:
3276
3277 /* When applying a 24 bit reloc we need to start one byte
3278 earlier. Otherwise the 32 bit get/put bfd operations might
3279 access a byte after the actual section. */
3280 if (r_type == R_390_PC24DBL
3281 || r_type == R_390_PLT24DBL)
3282 rel->r_offset--;
3283
3284 if (r_type == R_390_20
3285 || r_type == R_390_GOT20
3286 || r_type == R_390_GOTPLT20
3287 || r_type == R_390_TLS_GOTIE20)
3288 {
3289 relocation += rel->r_addend;
3290 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3291 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3292 contents, rel->r_offset,
3293 relocation, 0);
3294 }
3295 else
3296 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3297 contents, rel->r_offset,
3298 relocation, rel->r_addend);
3299
3300 if (r != bfd_reloc_ok)
3301 {
3302 const char *name;
3303
3304 if (h != NULL)
3305 name = h->root.root.string;
3306 else
3307 {
3308 name = bfd_elf_string_from_elf_section (input_bfd,
3309 symtab_hdr->sh_link,
3310 sym->st_name);
3311 if (name == NULL)
3312 return FALSE;
3313 if (*name == '\0')
3314 name = bfd_section_name (input_bfd, sec);
3315 }
3316
3317 if (r == bfd_reloc_overflow)
3318 (*info->callbacks->reloc_overflow)
3319 (info, (h ? &h->root : NULL), name, howto->name,
3320 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3321 else
3322 {
3323 _bfd_error_handler
3324 /* xgettext:c-format */
3325 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3326 input_bfd, input_section,
3327 (long) rel->r_offset, name, (int) r);
3328 return FALSE;
3329 }
3330 }
3331 }
3332
3333 return TRUE;
3334 }
3335
3336 /* Generate the PLT slots together with the dynamic relocations needed
3337 for IFUNC symbols. */
3338
3339 static void
3340 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3341 struct bfd_link_info *info,
3342 struct elf_link_hash_entry *h,
3343 struct elf_s390_link_hash_table *htab,
3344 bfd_vma plt_offset,
3345 bfd_vma resolver_address)
3346 {
3347 bfd_vma plt_index;
3348 bfd_vma got_offset;
3349 Elf_Internal_Rela rela;
3350 bfd_byte *loc;
3351 asection *plt, *gotplt, *relplt;
3352
3353 if (htab->elf.iplt == NULL
3354 || htab->elf.igotplt == NULL
3355 || htab->elf.irelplt == NULL)
3356 abort ();
3357
3358 /* Index of the PLT slot within iplt section. */
3359 plt_index = plt_offset / PLT_ENTRY_SIZE;
3360 plt = htab->elf.iplt;
3361 /* Offset into the igot.plt section. */
3362 got_offset = plt_index * GOT_ENTRY_SIZE;
3363 gotplt = htab->elf.igotplt;
3364 relplt = htab->elf.irelplt;
3365
3366 /* Fill in the blueprint of a PLT. */
3367 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3368 PLT_ENTRY_SIZE);
3369
3370 /* Fixup the relative address to the GOT entry */
3371 bfd_put_32 (output_bfd,
3372 (gotplt->output_section->vma +
3373 gotplt->output_offset + got_offset
3374 - (plt->output_section->vma +
3375 plt->output_offset +
3376 plt_offset))/2,
3377 plt->contents + plt_offset + 2);
3378 /* Fixup the relative branch to PLT 0 */
3379 bfd_put_32 (output_bfd, - (plt->output_offset +
3380 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3381 plt->contents + plt_offset + 24);
3382 /* Fixup offset into .rela.plt section. */
3383 bfd_put_32 (output_bfd, relplt->output_offset +
3384 plt_index * sizeof (Elf64_External_Rela),
3385 plt->contents + plt_offset + 28);
3386
3387 /* Fill in the entry in the global offset table.
3388 Points to instruction after GOT offset. */
3389 bfd_put_64 (output_bfd,
3390 (plt->output_section->vma
3391 + plt->output_offset
3392 + plt_offset
3393 + 14),
3394 gotplt->contents + got_offset);
3395
3396 /* Fill in the entry in the .rela.plt section. */
3397 rela.r_offset = (gotplt->output_section->vma
3398 + gotplt->output_offset
3399 + got_offset);
3400
3401 if (!h
3402 || h->dynindx == -1
3403 || ((bfd_link_executable (info)
3404 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3405 && h->def_regular))
3406 {
3407 /* The symbol can be locally resolved. */
3408 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3409 rela.r_addend = resolver_address;
3410 }
3411 else
3412 {
3413 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3414 rela.r_addend = 0;
3415 }
3416
3417 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3418 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3419 }
3420
3421
3422 /* Finish up dynamic symbol handling. We set the contents of various
3423 dynamic sections here. */
3424
3425 static bfd_boolean
3426 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3427 struct bfd_link_info *info,
3428 struct elf_link_hash_entry *h,
3429 Elf_Internal_Sym *sym)
3430 {
3431 struct elf_s390_link_hash_table *htab;
3432 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3433
3434 htab = elf_s390_hash_table (info);
3435 if (htab == NULL)
3436 return FALSE;
3437
3438 if (h->plt.offset != (bfd_vma) -1)
3439 {
3440 bfd_vma plt_index;
3441 bfd_vma got_offset;
3442 Elf_Internal_Rela rela;
3443 bfd_byte *loc;
3444
3445 /* This symbol has an entry in the procedure linkage table. Set
3446 it up. */
3447 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3448 {
3449 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3450 htab, h->plt.offset,
3451 eh->ifunc_resolver_address +
3452 eh->ifunc_resolver_section->output_offset +
3453 eh->ifunc_resolver_section->output_section->vma);
3454
3455 /* Do not return yet. Handling of explicit GOT slots of
3456 IFUNC symbols is below. */
3457 }
3458 else
3459 {
3460 if (h->dynindx == -1
3461 || htab->elf.splt == NULL
3462 || htab->elf.sgotplt == NULL
3463 || htab->elf.srelplt == NULL)
3464 abort ();
3465
3466 /* Calc. index no.
3467 Current offset - size first entry / entry size. */
3468 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3469
3470 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3471 addr & GOT addr. */
3472 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3473
3474 /* Fill in the blueprint of a PLT. */
3475 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3476 PLT_ENTRY_SIZE);
3477
3478 /* Fixup the relative address to the GOT entry */
3479 bfd_put_32 (output_bfd,
3480 (htab->elf.sgotplt->output_section->vma +
3481 htab->elf.sgotplt->output_offset + got_offset
3482 - (htab->elf.splt->output_section->vma +
3483 htab->elf.splt->output_offset +
3484 h->plt.offset))/2,
3485 htab->elf.splt->contents + h->plt.offset + 2);
3486 /* Fixup the relative branch to PLT 0 */
3487 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3488 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3489 htab->elf.splt->contents + h->plt.offset + 24);
3490 /* Fixup offset into .rela.plt section. */
3491 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3492 htab->elf.splt->contents + h->plt.offset + 28);
3493
3494 /* Fill in the entry in the global offset table.
3495 Points to instruction after GOT offset. */
3496 bfd_put_64 (output_bfd,
3497 (htab->elf.splt->output_section->vma
3498 + htab->elf.splt->output_offset
3499 + h->plt.offset
3500 + 14),
3501 htab->elf.sgotplt->contents + got_offset);
3502
3503 /* Fill in the entry in the .rela.plt section. */
3504 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3505 + htab->elf.sgotplt->output_offset
3506 + got_offset);
3507 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3508 rela.r_addend = 0;
3509 loc = htab->elf.srelplt->contents + plt_index *
3510 sizeof (Elf64_External_Rela);
3511 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3512
3513 if (!h->def_regular)
3514 {
3515 /* Mark the symbol as undefined, rather than as defined in
3516 the .plt section. Leave the value alone. This is a clue
3517 for the dynamic linker, to make function pointer
3518 comparisons work between an application and shared
3519 library. */
3520 sym->st_shndx = SHN_UNDEF;
3521 }
3522 }
3523 }
3524
3525 if (h->got.offset != (bfd_vma) -1
3526 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3527 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3528 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3529 {
3530 Elf_Internal_Rela rela;
3531 bfd_byte *loc;
3532
3533 /* This symbol has an entry in the global offset table. Set it
3534 up. */
3535 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3536 abort ();
3537
3538 rela.r_offset = (htab->elf.sgot->output_section->vma
3539 + htab->elf.sgot->output_offset
3540 + (h->got.offset &~ (bfd_vma) 1));
3541
3542 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3543 {
3544 if (bfd_link_pic (info))
3545 {
3546 /* An explicit GOT slot usage needs GLOB_DAT. If the
3547 symbol references local the implicit got.iplt slot
3548 will be used and the IRELATIVE reloc has been created
3549 above. */
3550 goto do_glob_dat;
3551 }
3552 else
3553 {
3554 /* For non-shared objects explicit GOT slots must be
3555 filled with the PLT slot address for pointer
3556 equality reasons. */
3557 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3558 + htab->elf.iplt->output_offset
3559 + h->plt.offset),
3560 htab->elf.sgot->contents + h->got.offset);
3561 return TRUE;
3562 }
3563 }
3564 else if (bfd_link_pic (info)
3565 && SYMBOL_REFERENCES_LOCAL (info, h))
3566 {
3567 /* If this is a static link, or it is a -Bsymbolic link and
3568 the symbol is defined locally or was forced to be local
3569 because of a version file, we just want to emit a
3570 RELATIVE reloc. The entry in the global offset table
3571 will already have been initialized in the
3572 relocate_section function. */
3573 if (!h->def_regular)
3574 return FALSE;
3575 BFD_ASSERT((h->got.offset & 1) != 0);
3576 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3577 rela.r_addend = (h->root.u.def.value
3578 + h->root.u.def.section->output_section->vma
3579 + h->root.u.def.section->output_offset);
3580 }
3581 else
3582 {
3583 BFD_ASSERT((h->got.offset & 1) == 0);
3584 do_glob_dat:
3585 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3586 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3587 rela.r_addend = 0;
3588 }
3589
3590 loc = htab->elf.srelgot->contents;
3591 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3592 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3593 }
3594
3595 if (h->needs_copy)
3596 {
3597 Elf_Internal_Rela rela;
3598 asection *s;
3599 bfd_byte *loc;
3600
3601 /* This symbols needs a copy reloc. Set it up. */
3602
3603 if (h->dynindx == -1
3604 || (h->root.type != bfd_link_hash_defined
3605 && h->root.type != bfd_link_hash_defweak)
3606 || htab->elf.srelbss == NULL)
3607 abort ();
3608
3609 rela.r_offset = (h->root.u.def.value
3610 + h->root.u.def.section->output_section->vma
3611 + h->root.u.def.section->output_offset);
3612 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3613 rela.r_addend = 0;
3614 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
3615 s = htab->elf.sreldynrelro;
3616 else
3617 s = htab->elf.srelbss;
3618 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3619 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3620 }
3621
3622 /* Mark some specially defined symbols as absolute. */
3623 if (h == htab->elf.hdynamic
3624 || h == htab->elf.hgot
3625 || h == htab->elf.hplt)
3626 sym->st_shndx = SHN_ABS;
3627
3628 return TRUE;
3629 }
3630
3631 /* Used to decide how to sort relocs in an optimal manner for the
3632 dynamic linker, before writing them out. */
3633
3634 static enum elf_reloc_type_class
3635 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3636 const asection *rel_sec ATTRIBUTE_UNUSED,
3637 const Elf_Internal_Rela *rela)
3638 {
3639 bfd *abfd = info->output_bfd;
3640 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3641 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3642 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3643 Elf_Internal_Sym sym;
3644
3645 if (htab->elf.dynsym == NULL
3646 || !bed->s->swap_symbol_in (abfd,
3647 (htab->elf.dynsym->contents
3648 + r_symndx * bed->s->sizeof_sym),
3649 0, &sym))
3650 abort ();
3651
3652 /* Check relocation against STT_GNU_IFUNC symbol. */
3653 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3654 return reloc_class_ifunc;
3655
3656 switch ((int) ELF64_R_TYPE (rela->r_info))
3657 {
3658 case R_390_RELATIVE:
3659 return reloc_class_relative;
3660 case R_390_JMP_SLOT:
3661 return reloc_class_plt;
3662 case R_390_COPY:
3663 return reloc_class_copy;
3664 default:
3665 return reloc_class_normal;
3666 }
3667 }
3668
3669 /* Finish up the dynamic sections. */
3670
3671 static bfd_boolean
3672 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3673 struct bfd_link_info *info)
3674 {
3675 struct elf_s390_link_hash_table *htab;
3676 bfd *dynobj;
3677 asection *sdyn;
3678 bfd *ibfd;
3679 unsigned int i;
3680
3681 htab = elf_s390_hash_table (info);
3682 if (htab == NULL)
3683 return FALSE;
3684
3685 dynobj = htab->elf.dynobj;
3686 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3687
3688 if (htab->elf.dynamic_sections_created)
3689 {
3690 Elf64_External_Dyn *dyncon, *dynconend;
3691
3692 if (sdyn == NULL || htab->elf.sgot == NULL)
3693 abort ();
3694
3695 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3696 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3697 for (; dyncon < dynconend; dyncon++)
3698 {
3699 Elf_Internal_Dyn dyn;
3700 asection *s;
3701
3702 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3703
3704 switch (dyn.d_tag)
3705 {
3706 default:
3707 continue;
3708
3709 case DT_PLTGOT:
3710 s = htab->elf.sgotplt;
3711 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3712 break;
3713
3714 case DT_JMPREL:
3715 s = htab->elf.srelplt;
3716 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3717 break;
3718
3719 case DT_PLTRELSZ:
3720 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3721 break;
3722
3723 case DT_RELASZ:
3724 /* The procedure linkage table relocs (DT_JMPREL) should
3725 not be included in the overall relocs (DT_RELA).
3726 Therefore, we override the DT_RELASZ entry here to
3727 make it not include the JMPREL relocs. Since the
3728 linker script arranges for .rela.plt to follow all
3729 other relocation sections, we don't have to worry
3730 about changing the DT_RELA entry. */
3731 dyn.d_un.d_val -= htab->elf.srelplt->size + htab->elf.irelplt->size;
3732 break;
3733 }
3734
3735 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3736 }
3737
3738 /* Fill in the special first entry in the procedure linkage table. */
3739 if (htab->elf.splt && htab->elf.splt->size > 0)
3740 {
3741 /* fill in blueprint for plt 0 entry */
3742 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3743 PLT_FIRST_ENTRY_SIZE);
3744 /* Fixup relative address to start of GOT */
3745 bfd_put_32 (output_bfd,
3746 (htab->elf.sgotplt->output_section->vma
3747 + htab->elf.sgotplt->output_offset
3748 - htab->elf.splt->output_section->vma
3749 - htab->elf.splt->output_offset - 6)/2,
3750 htab->elf.splt->contents + 8);
3751 }
3752 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3753 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3754 = PLT_ENTRY_SIZE;
3755 }
3756
3757 if (htab->elf.sgotplt)
3758 {
3759 /* Fill in the first three entries in the global offset table. */
3760 if (htab->elf.sgotplt->size > 0)
3761 {
3762 bfd_put_64 (output_bfd,
3763 (sdyn == NULL ? (bfd_vma) 0
3764 : sdyn->output_section->vma + sdyn->output_offset),
3765 htab->elf.sgotplt->contents);
3766 /* One entry for shared object struct ptr. */
3767 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3768 /* One entry for _dl_runtime_resolve. */
3769 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
3770 }
3771
3772 elf_section_data (htab->elf.sgot->output_section)
3773 ->this_hdr.sh_entsize = 8;
3774 }
3775
3776 /* Finish dynamic symbol for local IFUNC symbols. */
3777 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3778 {
3779 struct plt_entry *local_plt;
3780 Elf_Internal_Sym *isym;
3781 Elf_Internal_Shdr *symtab_hdr;
3782
3783 symtab_hdr = &elf_symtab_hdr (ibfd);
3784
3785 local_plt = elf_s390_local_plt (ibfd);
3786 if (local_plt != NULL)
3787 for (i = 0; i < symtab_hdr->sh_info; i++)
3788 {
3789 if (local_plt[i].plt.offset != (bfd_vma) -1)
3790 {
3791 asection *sec = local_plt[i].sec;
3792 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3793 if (isym == NULL)
3794 return FALSE;
3795
3796 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3797 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3798 local_plt[i].plt.offset,
3799 isym->st_value
3800 + sec->output_section->vma
3801 + sec->output_offset);
3802
3803 }
3804 }
3805 }
3806
3807 return TRUE;
3808 }
3809 \f
3810 /* Support for core dump NOTE sections. */
3811
3812 static bfd_boolean
3813 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3814 {
3815 int offset;
3816 size_t size;
3817
3818 switch (note->descsz)
3819 {
3820 default:
3821 return FALSE;
3822
3823 case 336: /* sizeof(struct elf_prstatus) on s390x */
3824 /* pr_cursig */
3825 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3826
3827 /* pr_pid */
3828 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3829
3830 /* pr_reg */
3831 offset = 112;
3832 size = 216;
3833 break;
3834 }
3835
3836 /* Make a ".reg/999" section. */
3837 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3838 size, note->descpos + offset);
3839 }
3840
3841 static bfd_boolean
3842 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3843 {
3844 switch (note->descsz)
3845 {
3846 default:
3847 return FALSE;
3848
3849 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3850 elf_tdata (abfd)->core->pid
3851 = bfd_get_32 (abfd, note->descdata + 24);
3852 elf_tdata (abfd)->core->program
3853 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3854 elf_tdata (abfd)->core->command
3855 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3856 }
3857
3858 /* Note that for some reason, a spurious space is tacked
3859 onto the end of the args in some (at least one anyway)
3860 implementations, so strip it off if it exists. */
3861
3862 {
3863 char *command = elf_tdata (abfd)->core->command;
3864 int n = strlen (command);
3865
3866 if (0 < n && command[n - 1] == ' ')
3867 command[n - 1] = '\0';
3868 }
3869
3870 return TRUE;
3871 }
3872
3873 static char *
3874 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3875 int note_type, ...)
3876 {
3877 va_list ap;
3878
3879 switch (note_type)
3880 {
3881 default:
3882 return NULL;
3883
3884 case NT_PRPSINFO:
3885 {
3886 char data[136] = { 0 };
3887 const char *fname, *psargs;
3888
3889 va_start (ap, note_type);
3890 fname = va_arg (ap, const char *);
3891 psargs = va_arg (ap, const char *);
3892 va_end (ap);
3893
3894 strncpy (data + 40, fname, 16);
3895 strncpy (data + 56, psargs, 80);
3896 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3897 &data, sizeof (data));
3898 }
3899
3900 case NT_PRSTATUS:
3901 {
3902 char data[336] = { 0 };
3903 long pid;
3904 int cursig;
3905 const void *gregs;
3906
3907 va_start (ap, note_type);
3908 pid = va_arg (ap, long);
3909 cursig = va_arg (ap, int);
3910 gregs = va_arg (ap, const void *);
3911 va_end (ap);
3912
3913 bfd_put_16 (abfd, cursig, data + 12);
3914 bfd_put_32 (abfd, pid, data + 32);
3915 memcpy (data + 112, gregs, 216);
3916 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3917 &data, sizeof (data));
3918 }
3919 }
3920 /* NOTREACHED */
3921 }
3922 \f
3923 /* Return address for Ith PLT stub in section PLT, for relocation REL
3924 or (bfd_vma) -1 if it should not be included. */
3925
3926 static bfd_vma
3927 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3928 const arelent *rel ATTRIBUTE_UNUSED)
3929 {
3930 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3931 }
3932
3933 /* Merge backend specific data from an object file to the output
3934 object file when linking. */
3935
3936 static bfd_boolean
3937 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3938 {
3939 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3940 return TRUE;
3941
3942 return elf_s390_merge_obj_attributes (ibfd, info);
3943 }
3944
3945 /* Why was the hash table entry size definition changed from
3946 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3947 this is the only reason for the s390_elf64_size_info structure. */
3948
3949 const struct elf_size_info s390_elf64_size_info =
3950 {
3951 sizeof (Elf64_External_Ehdr),
3952 sizeof (Elf64_External_Phdr),
3953 sizeof (Elf64_External_Shdr),
3954 sizeof (Elf64_External_Rel),
3955 sizeof (Elf64_External_Rela),
3956 sizeof (Elf64_External_Sym),
3957 sizeof (Elf64_External_Dyn),
3958 sizeof (Elf_External_Note),
3959 8, /* hash-table entry size. */
3960 1, /* internal relocations per external relocations. */
3961 64, /* arch_size. */
3962 3, /* log_file_align. */
3963 ELFCLASS64, EV_CURRENT,
3964 bfd_elf64_write_out_phdrs,
3965 bfd_elf64_write_shdrs_and_ehdr,
3966 bfd_elf64_checksum_contents,
3967 bfd_elf64_write_relocs,
3968 bfd_elf64_swap_symbol_in,
3969 bfd_elf64_swap_symbol_out,
3970 bfd_elf64_slurp_reloc_table,
3971 bfd_elf64_slurp_symbol_table,
3972 bfd_elf64_swap_dyn_in,
3973 bfd_elf64_swap_dyn_out,
3974 bfd_elf64_swap_reloc_in,
3975 bfd_elf64_swap_reloc_out,
3976 bfd_elf64_swap_reloca_in,
3977 bfd_elf64_swap_reloca_out
3978 };
3979
3980 #define TARGET_BIG_SYM s390_elf64_vec
3981 #define TARGET_BIG_NAME "elf64-s390"
3982 #define ELF_ARCH bfd_arch_s390
3983 #define ELF_TARGET_ID S390_ELF_DATA
3984 #define ELF_MACHINE_CODE EM_S390
3985 #define ELF_MACHINE_ALT1 EM_S390_OLD
3986 #define ELF_MAXPAGESIZE 0x1000
3987
3988 #define elf_backend_size_info s390_elf64_size_info
3989
3990 #define elf_backend_can_gc_sections 1
3991 #define elf_backend_can_refcount 1
3992 #define elf_backend_want_got_plt 1
3993 #define elf_backend_plt_readonly 1
3994 #define elf_backend_want_plt_sym 0
3995 #define elf_backend_got_header_size 24
3996 #define elf_backend_want_dynrelro 1
3997 #define elf_backend_rela_normal 1
3998
3999 #define elf_info_to_howto elf_s390_info_to_howto
4000
4001 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
4002 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
4003 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4004 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4005 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
4006
4007 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4008 #define elf_backend_check_relocs elf_s390_check_relocs
4009 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4010 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4011 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4012 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4013 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4014 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4015 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4016 #define elf_backend_relocate_section elf_s390_relocate_section
4017 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4018 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4019 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4020 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4021 #define elf_backend_write_core_note elf_s390_write_core_note
4022 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4023 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4024 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4025
4026 #define bfd_elf64_mkobject elf_s390_mkobject
4027 #define elf_backend_object_p elf_s390_object_p
4028
4029 #include "elf64-target.h"
GDB Binutils - Deliverables
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