]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blob - bfd/elf64-s390.c
projects / thirdparty / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Update copyright years
[thirdparty/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2014 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
29 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
30 from smaller values. Start with zero, widen, *then* decrement. */
31 #define MINUS_ONE (((bfd_vma)0) - 1)
32
33 static bfd_reloc_status_type
34 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
36 static bfd_reloc_status_type
37 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
38 asection *, bfd *, char **);
39
40 /* The relocation "howto" table. */
41 static reloc_howto_type elf_howto_table[] =
42 {
43 HOWTO (R_390_NONE, /* type */
44 0, /* rightshift */
45 0, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
46 0, /* bitsize */
47 FALSE, /* pc_relative */
48 0, /* bitpos */
49 complain_overflow_dont, /* complain_on_overflow */
50 bfd_elf_generic_reloc, /* special_function */
51 "R_390_NONE", /* name */
52 FALSE, /* partial_inplace */
53 0, /* src_mask */
54 0, /* dst_mask */
55 FALSE), /* pcrel_offset */
56
57 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
58 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
59 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
60 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
61 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
63 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
65 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
67 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
69 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
71 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
73 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
75 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
79 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
81 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
83 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
85 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
87 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
97 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
99 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
101 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
103 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
105 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
107 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
109 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
111 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
113 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
114 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
115 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
119 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
121 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
123 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
125 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
127 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
129 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
130 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
131 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
135 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
136 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
138 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
139 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
140 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
141 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
143 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
144 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
146 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
147 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
149 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
151 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
152 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
154 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
155 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
157 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
164 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
165 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
169 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
172 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
173 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
175 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
179 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
181 };
182
183 /* GNU extension to record C++ vtable hierarchy. */
184 static reloc_howto_type elf64_s390_vtinherit_howto =
185 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
186 static reloc_howto_type elf64_s390_vtentry_howto =
187 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);
188
189 static reloc_howto_type *
190 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
191 bfd_reloc_code_real_type code)
192 {
193 switch (code)
194 {
195 case BFD_RELOC_NONE:
196 return &elf_howto_table[(int) R_390_NONE];
197 case BFD_RELOC_8:
198 return &elf_howto_table[(int) R_390_8];
199 case BFD_RELOC_390_12:
200 return &elf_howto_table[(int) R_390_12];
201 case BFD_RELOC_16:
202 return &elf_howto_table[(int) R_390_16];
203 case BFD_RELOC_32:
204 return &elf_howto_table[(int) R_390_32];
205 case BFD_RELOC_CTOR:
206 return &elf_howto_table[(int) R_390_32];
207 case BFD_RELOC_32_PCREL:
208 return &elf_howto_table[(int) R_390_PC32];
209 case BFD_RELOC_390_GOT12:
210 return &elf_howto_table[(int) R_390_GOT12];
211 case BFD_RELOC_32_GOT_PCREL:
212 return &elf_howto_table[(int) R_390_GOT32];
213 case BFD_RELOC_390_PLT32:
214 return &elf_howto_table[(int) R_390_PLT32];
215 case BFD_RELOC_390_COPY:
216 return &elf_howto_table[(int) R_390_COPY];
217 case BFD_RELOC_390_GLOB_DAT:
218 return &elf_howto_table[(int) R_390_GLOB_DAT];
219 case BFD_RELOC_390_JMP_SLOT:
220 return &elf_howto_table[(int) R_390_JMP_SLOT];
221 case BFD_RELOC_390_RELATIVE:
222 return &elf_howto_table[(int) R_390_RELATIVE];
223 case BFD_RELOC_32_GOTOFF:
224 return &elf_howto_table[(int) R_390_GOTOFF32];
225 case BFD_RELOC_390_GOTPC:
226 return &elf_howto_table[(int) R_390_GOTPC];
227 case BFD_RELOC_390_GOT16:
228 return &elf_howto_table[(int) R_390_GOT16];
229 case BFD_RELOC_16_PCREL:
230 return &elf_howto_table[(int) R_390_PC16];
231 case BFD_RELOC_390_PC12DBL:
232 return &elf_howto_table[(int) R_390_PC12DBL];
233 case BFD_RELOC_390_PLT12DBL:
234 return &elf_howto_table[(int) R_390_PLT12DBL];
235 case BFD_RELOC_390_PC16DBL:
236 return &elf_howto_table[(int) R_390_PC16DBL];
237 case BFD_RELOC_390_PLT16DBL:
238 return &elf_howto_table[(int) R_390_PLT16DBL];
239 case BFD_RELOC_390_PC24DBL:
240 return &elf_howto_table[(int) R_390_PC24DBL];
241 case BFD_RELOC_390_PLT24DBL:
242 return &elf_howto_table[(int) R_390_PLT24DBL];
243 case BFD_RELOC_390_PC32DBL:
244 return &elf_howto_table[(int) R_390_PC32DBL];
245 case BFD_RELOC_390_PLT32DBL:
246 return &elf_howto_table[(int) R_390_PLT32DBL];
247 case BFD_RELOC_390_GOTPCDBL:
248 return &elf_howto_table[(int) R_390_GOTPCDBL];
249 case BFD_RELOC_64:
250 return &elf_howto_table[(int) R_390_64];
251 case BFD_RELOC_64_PCREL:
252 return &elf_howto_table[(int) R_390_PC64];
253 case BFD_RELOC_390_GOT64:
254 return &elf_howto_table[(int) R_390_GOT64];
255 case BFD_RELOC_390_PLT64:
256 return &elf_howto_table[(int) R_390_PLT64];
257 case BFD_RELOC_390_GOTENT:
258 return &elf_howto_table[(int) R_390_GOTENT];
259 case BFD_RELOC_16_GOTOFF:
260 return &elf_howto_table[(int) R_390_GOTOFF16];
261 case BFD_RELOC_390_GOTOFF64:
262 return &elf_howto_table[(int) R_390_GOTOFF64];
263 case BFD_RELOC_390_GOTPLT12:
264 return &elf_howto_table[(int) R_390_GOTPLT12];
265 case BFD_RELOC_390_GOTPLT16:
266 return &elf_howto_table[(int) R_390_GOTPLT16];
267 case BFD_RELOC_390_GOTPLT32:
268 return &elf_howto_table[(int) R_390_GOTPLT32];
269 case BFD_RELOC_390_GOTPLT64:
270 return &elf_howto_table[(int) R_390_GOTPLT64];
271 case BFD_RELOC_390_GOTPLTENT:
272 return &elf_howto_table[(int) R_390_GOTPLTENT];
273 case BFD_RELOC_390_PLTOFF16:
274 return &elf_howto_table[(int) R_390_PLTOFF16];
275 case BFD_RELOC_390_PLTOFF32:
276 return &elf_howto_table[(int) R_390_PLTOFF32];
277 case BFD_RELOC_390_PLTOFF64:
278 return &elf_howto_table[(int) R_390_PLTOFF64];
279 case BFD_RELOC_390_TLS_LOAD:
280 return &elf_howto_table[(int) R_390_TLS_LOAD];
281 case BFD_RELOC_390_TLS_GDCALL:
282 return &elf_howto_table[(int) R_390_TLS_GDCALL];
283 case BFD_RELOC_390_TLS_LDCALL:
284 return &elf_howto_table[(int) R_390_TLS_LDCALL];
285 case BFD_RELOC_390_TLS_GD64:
286 return &elf_howto_table[(int) R_390_TLS_GD64];
287 case BFD_RELOC_390_TLS_GOTIE12:
288 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
289 case BFD_RELOC_390_TLS_GOTIE64:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
291 case BFD_RELOC_390_TLS_LDM64:
292 return &elf_howto_table[(int) R_390_TLS_LDM64];
293 case BFD_RELOC_390_TLS_IE64:
294 return &elf_howto_table[(int) R_390_TLS_IE64];
295 case BFD_RELOC_390_TLS_IEENT:
296 return &elf_howto_table[(int) R_390_TLS_IEENT];
297 case BFD_RELOC_390_TLS_LE64:
298 return &elf_howto_table[(int) R_390_TLS_LE64];
299 case BFD_RELOC_390_TLS_LDO64:
300 return &elf_howto_table[(int) R_390_TLS_LDO64];
301 case BFD_RELOC_390_TLS_DTPMOD:
302 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
303 case BFD_RELOC_390_TLS_DTPOFF:
304 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
305 case BFD_RELOC_390_TLS_TPOFF:
306 return &elf_howto_table[(int) R_390_TLS_TPOFF];
307 case BFD_RELOC_390_20:
308 return &elf_howto_table[(int) R_390_20];
309 case BFD_RELOC_390_GOT20:
310 return &elf_howto_table[(int) R_390_GOT20];
311 case BFD_RELOC_390_GOTPLT20:
312 return &elf_howto_table[(int) R_390_GOTPLT20];
313 case BFD_RELOC_390_TLS_GOTIE20:
314 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
315 case BFD_RELOC_390_IRELATIVE:
316 return &elf_howto_table[(int) R_390_IRELATIVE];
317 case BFD_RELOC_VTABLE_INHERIT:
318 return &elf64_s390_vtinherit_howto;
319 case BFD_RELOC_VTABLE_ENTRY:
320 return &elf64_s390_vtentry_howto;
321 default:
322 break;
323 }
324 return 0;
325 }
326
327 static reloc_howto_type *
328 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
329 const char *r_name)
330 {
331 unsigned int i;
332
333 for (i = 0;
334 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
335 i++)
336 if (elf_howto_table[i].name != NULL
337 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
338 return &elf_howto_table[i];
339
340 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
341 return &elf64_s390_vtinherit_howto;
342 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
343 return &elf64_s390_vtentry_howto;
344
345 return NULL;
346 }
347
348 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
349 and elf64-s390.c has its own copy. */
350
351 static void
352 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
353 arelent *cache_ptr,
354 Elf_Internal_Rela *dst)
355 {
356 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
357 switch (r_type)
358 {
359 case R_390_GNU_VTINHERIT:
360 cache_ptr->howto = &elf64_s390_vtinherit_howto;
361 break;
362
363 case R_390_GNU_VTENTRY:
364 cache_ptr->howto = &elf64_s390_vtentry_howto;
365 break;
366
367 default:
368 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
369 {
370 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
371 abfd, (int) r_type);
372 r_type = R_390_NONE;
373 }
374 cache_ptr->howto = &elf_howto_table[r_type];
375 }
376 }
377
378 /* A relocation function which doesn't do anything. */
379 static bfd_reloc_status_type
380 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
381 arelent *reloc_entry,
382 asymbol *symbol ATTRIBUTE_UNUSED,
383 void * data ATTRIBUTE_UNUSED,
384 asection *input_section,
385 bfd *output_bfd,
386 char **error_message ATTRIBUTE_UNUSED)
387 {
388 if (output_bfd)
389 reloc_entry->address += input_section->output_offset;
390 return bfd_reloc_ok;
391 }
392
393 /* Handle the large displacement relocs. */
394 static bfd_reloc_status_type
395 s390_elf_ldisp_reloc (bfd *abfd,
396 arelent *reloc_entry,
397 asymbol *symbol,
398 void * data,
399 asection *input_section,
400 bfd *output_bfd,
401 char **error_message ATTRIBUTE_UNUSED)
402 {
403 reloc_howto_type *howto = reloc_entry->howto;
404 bfd_vma relocation;
405 bfd_vma insn;
406
407 if (output_bfd != (bfd *) NULL
408 && (symbol->flags & BSF_SECTION_SYM) == 0
409 && (! howto->partial_inplace
410 || reloc_entry->addend == 0))
411 {
412 reloc_entry->address += input_section->output_offset;
413 return bfd_reloc_ok;
414 }
415 if (output_bfd != NULL)
416 return bfd_reloc_continue;
417
418 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
419 return bfd_reloc_outofrange;
420
421 relocation = (symbol->value
422 + symbol->section->output_section->vma
423 + symbol->section->output_offset);
424 relocation += reloc_entry->addend;
425 if (howto->pc_relative)
426 {
427 relocation -= (input_section->output_section->vma
428 + input_section->output_offset);
429 relocation -= reloc_entry->address;
430 }
431
432 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
433 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
434 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
435
436 if ((bfd_signed_vma) relocation < - 0x80000
437 || (bfd_signed_vma) relocation > 0x7ffff)
438 return bfd_reloc_overflow;
439 else
440 return bfd_reloc_ok;
441 }
442
443 static bfd_boolean
444 elf_s390_is_local_label_name (bfd *abfd, const char *name)
445 {
446 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
447 return TRUE;
448
449 return _bfd_elf_is_local_label_name (abfd, name);
450 }
451
452 /* Functions for the 390 ELF linker. */
453
454 /* The name of the dynamic interpreter. This is put in the .interp
455 section. */
456
457 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
458
459 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
460 copying dynamic variables from a shared lib into an app's dynbss
461 section, and instead use a dynamic relocation to point into the
462 shared lib. */
463 #define ELIMINATE_COPY_RELOCS 1
464
465 /* The size in bytes of the first entry in the procedure linkage table. */
466 #define PLT_FIRST_ENTRY_SIZE 32
467 /* The size in bytes of an entry in the procedure linkage table. */
468 #define PLT_ENTRY_SIZE 32
469
470 #define GOT_ENTRY_SIZE 8
471
472 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
473
474 /* The first three entries in a procedure linkage table are reserved,
475 and the initial contents are unimportant (we zero them out).
476 Subsequent entries look like this. See the SVR4 ABI 386
477 supplement to see how this works. */
478
479 /* For the s390, simple addr offset can only be 0 - 4096.
480 To use the full 16777216 TB address space, several instructions
481 are needed to load an address in a register and execute
482 a branch( or just saving the address)
483
484 Furthermore, only r 0 and 1 are free to use!!! */
485
486 /* The first 3 words in the GOT are then reserved.
487 Word 0 is the address of the dynamic table.
488 Word 1 is a pointer to a structure describing the object
489 Word 2 is used to point to the loader entry address.
490
491 The code for PLT entries looks like this:
492
493 The GOT holds the address in the PLT to be executed.
494 The loader then gets:
495 24(15) = Pointer to the structure describing the object.
496 28(15) = Offset in symbol table
497 The loader must then find the module where the function is
498 and insert the address in the GOT.
499
500 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
501 LG 1,0(1) # 6 bytes Load address from GOT in r1
502 BCR 15,1 # 2 bytes Jump to address
503 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
504 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
505 BRCL 15,-x # 6 bytes Jump to start of PLT
506 .long ? # 4 bytes offset into .rela.plt
507
508 Total = 32 bytes per PLT entry
509 Fixup at offset 2: relative address to GOT entry
510 Fixup at offset 22: relative branch to PLT0
511 Fixup at offset 28: 32 bit offset into .rela.plt
512
513 A 32 bit offset into the symbol table is enough. It allows for
514 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
515 object (the main program, any shared library) is limited to 4GB in
516 size. Having a .rela.plt of 2GB would already make the .plt
517 section bigger than 8GB. */
518
519 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
520 {
521 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
522 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
523 0x07, 0xf1, /* br %r1 */
524 0x0d, 0x10, /* basr %r1,%r0 */
525 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
526 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
527 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
528 };
529
530 /* The first PLT entry pushes the offset into the symbol table
531 from R1 onto the stack at 56(15) and the loader object info
532 at 48(15), loads the loader address in R1 and jumps to it. */
533
534 /* The first entry in the PLT:
535
536 PLT0:
537 STG 1,56(15) # r1 contains the offset into the symbol table
538 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
539 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
540 LG 1,16(1) # get entry address of loader
541 BCR 15,1 # jump to loader
542
543 Fixup at offset 8: relative address to start of GOT. */
544
545 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
546 {
547 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
548 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
549 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
550 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
551 0x07, 0xf1, /* br %r1 */
552 0x07, 0x00, /* nopr %r0 */
553 0x07, 0x00, /* nopr %r0 */
554 0x07, 0x00 /* nopr %r0 */
555 };
556
557
558 /* s390 ELF linker hash entry. */
559
560 struct elf_s390_link_hash_entry
561 {
562 struct elf_link_hash_entry elf;
563
564 /* Track dynamic relocs copied for this symbol. */
565 struct elf_dyn_relocs *dyn_relocs;
566
567 /* Number of GOTPLT references for a function. */
568 bfd_signed_vma gotplt_refcount;
569
570 #define GOT_UNKNOWN 0
571 #define GOT_NORMAL 1
572 #define GOT_TLS_GD 2
573 #define GOT_TLS_IE 3
574 #define GOT_TLS_IE_NLT 3
575 unsigned char tls_type;
576
577 /* For pointer equality reasons we might need to change the symbol
578 type from STT_GNU_IFUNC to STT_FUNC together with its value and
579 section entry. So after alloc_dynrelocs only these values should
580 be used. In order to check whether a symbol is IFUNC use
581 s390_is_ifunc_symbol_p. */
582 bfd_vma ifunc_resolver_address;
583 asection *ifunc_resolver_section;
584 };
585
586 #define elf_s390_hash_entry(ent) \
587 ((struct elf_s390_link_hash_entry *)(ent))
588
589 /* This structure represents an entry in the local PLT list needed for
590 local IFUNC symbols. */
591 struct plt_entry
592 {
593 /* The section of the local symbol.
594 Set in relocate_section and used in finish_dynamic_sections. */
595 asection *sec;
596
597 union
598 {
599 bfd_signed_vma refcount;
600 bfd_vma offset;
601 } plt;
602 };
603
604 /* NOTE: Keep this structure in sync with
605 the one declared in elf32-s390.c. */
606 struct elf_s390_obj_tdata
607 {
608 struct elf_obj_tdata root;
609
610 /* A local PLT is needed for ifunc symbols. */
611 struct plt_entry *local_plt;
612
613 /* TLS type for each local got entry. */
614 char *local_got_tls_type;
615 };
616
617 #define elf_s390_tdata(abfd) \
618 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
619
620 #define elf_s390_local_plt(abfd) \
621 (elf_s390_tdata (abfd)->local_plt)
622
623 #define elf_s390_local_got_tls_type(abfd) \
624 (elf_s390_tdata (abfd)->local_got_tls_type)
625
626 #define is_s390_elf(bfd) \
627 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
628 && elf_tdata (bfd) != NULL \
629 && elf_object_id (bfd) == S390_ELF_DATA)
630
631 static bfd_boolean
632 elf_s390_mkobject (bfd *abfd)
633 {
634 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
635 S390_ELF_DATA);
636 }
637
638 static bfd_boolean
639 elf_s390_object_p (bfd *abfd)
640 {
641 /* Set the right machine number for an s390 elf32 file. */
642 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
643 }
644
645 /* s390 ELF linker hash table. */
646
647 struct elf_s390_link_hash_table
648 {
649 struct elf_link_hash_table elf;
650
651 /* Short-cuts to get to dynamic linker sections. */
652 asection *sdynbss;
653 asection *srelbss;
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 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
732 shortcuts to them in our hash table. */
733
734 static bfd_boolean
735 create_got_section (bfd *dynobj,
736 struct bfd_link_info *info)
737 {
738 struct elf_s390_link_hash_table *htab;
739
740 if (! _bfd_elf_create_got_section (dynobj, info))
741 return FALSE;
742
743 htab = elf_s390_hash_table (info);
744 if (htab == NULL)
745 return FALSE;
746
747 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
748 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
749 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
750 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
751 abort ();
752 return TRUE;
753 }
754
755 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
756 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
757 hash table. */
758
759 static bfd_boolean
760 elf_s390_create_dynamic_sections (bfd *dynobj,
761 struct bfd_link_info *info)
762 {
763 struct elf_s390_link_hash_table *htab;
764
765 htab = elf_s390_hash_table (info);
766 if (htab == NULL)
767 return FALSE;
768
769 if (!htab->elf.sgot && !create_got_section (dynobj, info))
770 return FALSE;
771
772 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
773 return FALSE;
774
775 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
776 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
777 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
778 if (!info->shared)
779 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
780
781 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
782 || (!info->shared && !htab->srelbss))
783 abort ();
784
785 return TRUE;
786 }
787
788 /* Copy the extra info we tack onto an elf_link_hash_entry. */
789
790 static void
791 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
792 struct elf_link_hash_entry *dir,
793 struct elf_link_hash_entry *ind)
794 {
795 struct elf_s390_link_hash_entry *edir, *eind;
796
797 edir = (struct elf_s390_link_hash_entry *) dir;
798 eind = (struct elf_s390_link_hash_entry *) ind;
799
800 if (eind->dyn_relocs != NULL)
801 {
802 if (edir->dyn_relocs != NULL)
803 {
804 struct elf_dyn_relocs **pp;
805 struct elf_dyn_relocs *p;
806
807 /* Add reloc counts against the indirect sym to the direct sym
808 list. Merge any entries against the same section. */
809 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
810 {
811 struct elf_dyn_relocs *q;
812
813 for (q = edir->dyn_relocs; q != NULL; q = q->next)
814 if (q->sec == p->sec)
815 {
816 q->pc_count += p->pc_count;
817 q->count += p->count;
818 *pp = p->next;
819 break;
820 }
821 if (q == NULL)
822 pp = &p->next;
823 }
824 *pp = edir->dyn_relocs;
825 }
826
827 edir->dyn_relocs = eind->dyn_relocs;
828 eind->dyn_relocs = NULL;
829 }
830
831 if (ind->root.type == bfd_link_hash_indirect
832 && dir->got.refcount <= 0)
833 {
834 edir->tls_type = eind->tls_type;
835 eind->tls_type = GOT_UNKNOWN;
836 }
837
838 if (ELIMINATE_COPY_RELOCS
839 && ind->root.type != bfd_link_hash_indirect
840 && dir->dynamic_adjusted)
841 {
842 /* If called to transfer flags for a weakdef during processing
843 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
844 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
845 dir->ref_dynamic |= ind->ref_dynamic;
846 dir->ref_regular |= ind->ref_regular;
847 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
848 dir->needs_plt |= ind->needs_plt;
849 }
850 else
851 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
852 }
853
854 static int
855 elf_s390_tls_transition (struct bfd_link_info *info,
856 int r_type,
857 int is_local)
858 {
859 if (info->shared)
860 return r_type;
861
862 switch (r_type)
863 {
864 case R_390_TLS_GD64:
865 case R_390_TLS_IE64:
866 if (is_local)
867 return R_390_TLS_LE64;
868 return R_390_TLS_IE64;
869 case R_390_TLS_GOTIE64:
870 if (is_local)
871 return R_390_TLS_LE64;
872 return R_390_TLS_GOTIE64;
873 case R_390_TLS_LDM64:
874 return R_390_TLS_LE64;
875 }
876
877 return r_type;
878 }
879
880 /* Look through the relocs for a section during the first phase, and
881 allocate space in the global offset table or procedure linkage
882 table. */
883
884 static bfd_boolean
885 elf_s390_check_relocs (bfd *abfd,
886 struct bfd_link_info *info,
887 asection *sec,
888 const Elf_Internal_Rela *relocs)
889 {
890 struct elf_s390_link_hash_table *htab;
891 Elf_Internal_Shdr *symtab_hdr;
892 struct elf_link_hash_entry **sym_hashes;
893 const Elf_Internal_Rela *rel;
894 const Elf_Internal_Rela *rel_end;
895 asection *sreloc;
896 bfd_signed_vma *local_got_refcounts;
897 int tls_type, old_tls_type;
898
899 if (info->relocatable)
900 return TRUE;
901
902 BFD_ASSERT (is_s390_elf (abfd));
903
904 htab = elf_s390_hash_table (info);
905 if (htab == NULL)
906 return FALSE;
907
908 symtab_hdr = &elf_symtab_hdr (abfd);
909 sym_hashes = elf_sym_hashes (abfd);
910 local_got_refcounts = elf_local_got_refcounts (abfd);
911
912 sreloc = NULL;
913
914 rel_end = relocs + sec->reloc_count;
915 for (rel = relocs; rel < rel_end; rel++)
916 {
917 unsigned int r_type;
918 unsigned long r_symndx;
919 struct elf_link_hash_entry *h;
920 Elf_Internal_Sym *isym;
921
922 r_symndx = ELF64_R_SYM (rel->r_info);
923
924 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
925 {
926 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
927 abfd,
928 r_symndx);
929 return FALSE;
930 }
931
932 if (r_symndx < symtab_hdr->sh_info)
933 {
934 /* A local symbol. */
935 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
936 abfd, r_symndx);
937 if (isym == NULL)
938 return FALSE;
939
940 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
941 {
942 struct plt_entry *plt;
943
944 if (htab->elf.dynobj == NULL)
945 htab->elf.dynobj = abfd;
946
947 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
948 return FALSE;
949
950 if (local_got_refcounts == NULL)
951 {
952 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
953 return FALSE;
954 local_got_refcounts = elf_local_got_refcounts (abfd);
955 }
956 plt = elf_s390_local_plt (abfd);
957 plt[r_symndx].plt.refcount++;
958 }
959 h = NULL;
960 }
961 else
962 {
963 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
964 while (h->root.type == bfd_link_hash_indirect
965 || h->root.type == bfd_link_hash_warning)
966 h = (struct elf_link_hash_entry *) h->root.u.i.link;
967
968 /* PR15323, ref flags aren't set for references in the same
969 object. */
970 h->root.non_ir_ref = 1;
971 }
972
973 /* Create got section and local_got_refcounts array if they
974 are needed. */
975 r_type = elf_s390_tls_transition (info,
976 ELF64_R_TYPE (rel->r_info),
977 h == NULL);
978 switch (r_type)
979 {
980 case R_390_GOT12:
981 case R_390_GOT16:
982 case R_390_GOT20:
983 case R_390_GOT32:
984 case R_390_GOT64:
985 case R_390_GOTENT:
986 case R_390_GOTPLT12:
987 case R_390_GOTPLT16:
988 case R_390_GOTPLT20:
989 case R_390_GOTPLT32:
990 case R_390_GOTPLT64:
991 case R_390_GOTPLTENT:
992 case R_390_TLS_GD64:
993 case R_390_TLS_GOTIE12:
994 case R_390_TLS_GOTIE20:
995 case R_390_TLS_GOTIE64:
996 case R_390_TLS_IEENT:
997 case R_390_TLS_IE64:
998 case R_390_TLS_LDM64:
999 if (h == NULL
1000 && local_got_refcounts == NULL)
1001 {
1002 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1003 return FALSE;
1004 local_got_refcounts = elf_local_got_refcounts (abfd);
1005 }
1006
1007 /* Fall through. */
1008 case R_390_GOTOFF16:
1009 case R_390_GOTOFF32:
1010 case R_390_GOTOFF64:
1011 case R_390_GOTPC:
1012 case R_390_GOTPCDBL:
1013 if (htab->elf.sgot == NULL)
1014 {
1015 if (htab->elf.dynobj == NULL)
1016 htab->elf.dynobj = abfd;
1017 if (!create_got_section (htab->elf.dynobj, info))
1018 return FALSE;
1019 }
1020 }
1021
1022 if (h != NULL)
1023 {
1024 if (htab->elf.dynobj == NULL)
1025 htab->elf.dynobj = abfd;
1026 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1027 return FALSE;
1028
1029 /* Make sure an IFUNC symbol defined in a non-shared object
1030 always gets a PLT slot. */
1031 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1032 {
1033 /* The symbol is called by the dynamic loader in order
1034 to resolve the relocation. So it is in fact also
1035 referenced. */
1036 h->ref_regular = 1;
1037 h->needs_plt = 1;
1038 }
1039 }
1040
1041 switch (r_type)
1042 {
1043 case R_390_GOTOFF16:
1044 case R_390_GOTOFF32:
1045 case R_390_GOTOFF64:
1046 case R_390_GOTPC:
1047 case R_390_GOTPCDBL:
1048 /* These relocs do not need a GOT slot. They just load the
1049 GOT pointer itself or address something else relative to
1050 the GOT. Since the GOT pointer has been set up above we
1051 are done. */
1052 break;
1053
1054 case R_390_PLT12DBL:
1055 case R_390_PLT16DBL:
1056 case R_390_PLT24DBL:
1057 case R_390_PLT32:
1058 case R_390_PLT32DBL:
1059 case R_390_PLT64:
1060 case R_390_PLTOFF16:
1061 case R_390_PLTOFF32:
1062 case R_390_PLTOFF64:
1063 /* This symbol requires a procedure linkage table entry. We
1064 actually build the entry in adjust_dynamic_symbol,
1065 because this might be a case of linking PIC code which is
1066 never referenced by a dynamic object, in which case we
1067 don't need to generate a procedure linkage table entry
1068 after all. */
1069
1070 /* If this is a local symbol, we resolve it directly without
1071 creating a procedure linkage table entry. */
1072 if (h != NULL)
1073 {
1074 h->needs_plt = 1;
1075 h->plt.refcount += 1;
1076 }
1077 break;
1078
1079 case R_390_GOTPLT12:
1080 case R_390_GOTPLT16:
1081 case R_390_GOTPLT20:
1082 case R_390_GOTPLT32:
1083 case R_390_GOTPLT64:
1084 case R_390_GOTPLTENT:
1085 /* This symbol requires either a procedure linkage table entry
1086 or an entry in the local got. We actually build the entry
1087 in adjust_dynamic_symbol because whether this is really a
1088 global reference can change and with it the fact if we have
1089 to create a plt entry or a local got entry. To be able to
1090 make a once global symbol a local one we have to keep track
1091 of the number of gotplt references that exist for this
1092 symbol. */
1093 if (h != NULL)
1094 {
1095 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1096 h->needs_plt = 1;
1097 h->plt.refcount += 1;
1098 }
1099 else
1100 local_got_refcounts[r_symndx] += 1;
1101 break;
1102
1103 case R_390_TLS_LDM64:
1104 htab->tls_ldm_got.refcount += 1;
1105 break;
1106
1107 case R_390_TLS_IE64:
1108 case R_390_TLS_GOTIE12:
1109 case R_390_TLS_GOTIE20:
1110 case R_390_TLS_GOTIE64:
1111 case R_390_TLS_IEENT:
1112 if (info->shared)
1113 info->flags |= DF_STATIC_TLS;
1114 /* Fall through */
1115
1116 case R_390_GOT12:
1117 case R_390_GOT16:
1118 case R_390_GOT20:
1119 case R_390_GOT32:
1120 case R_390_GOT64:
1121 case R_390_GOTENT:
1122 case R_390_TLS_GD64:
1123 /* This symbol requires a global offset table entry. */
1124 switch (r_type)
1125 {
1126 default:
1127 case R_390_GOT12:
1128 case R_390_GOT16:
1129 case R_390_GOT20:
1130 case R_390_GOT32:
1131 case R_390_GOTENT:
1132 tls_type = GOT_NORMAL;
1133 break;
1134 case R_390_TLS_GD64:
1135 tls_type = GOT_TLS_GD;
1136 break;
1137 case R_390_TLS_IE64:
1138 case R_390_TLS_GOTIE64:
1139 tls_type = GOT_TLS_IE;
1140 break;
1141 case R_390_TLS_GOTIE12:
1142 case R_390_TLS_GOTIE20:
1143 case R_390_TLS_IEENT:
1144 tls_type = GOT_TLS_IE_NLT;
1145 break;
1146 }
1147
1148 if (h != NULL)
1149 {
1150 h->got.refcount += 1;
1151 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1152 }
1153 else
1154 {
1155 local_got_refcounts[r_symndx] += 1;
1156 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1157 }
1158 /* If a TLS symbol is accessed using IE at least once,
1159 there is no point to use dynamic model for it. */
1160 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1161 {
1162 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1163 {
1164 (*_bfd_error_handler)
1165 (_("%B: `%s' accessed both as normal and thread local symbol"),
1166 abfd, h->root.root.string);
1167 return FALSE;
1168 }
1169 if (old_tls_type > tls_type)
1170 tls_type = old_tls_type;
1171 }
1172
1173 if (old_tls_type != tls_type)
1174 {
1175 if (h != NULL)
1176 elf_s390_hash_entry (h)->tls_type = tls_type;
1177 else
1178 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1179 }
1180
1181 if (r_type != R_390_TLS_IE64)
1182 break;
1183 /* Fall through */
1184
1185 case R_390_TLS_LE64:
1186 if (!info->shared)
1187 break;
1188 info->flags |= DF_STATIC_TLS;
1189 /* Fall through */
1190
1191 case R_390_8:
1192 case R_390_16:
1193 case R_390_32:
1194 case R_390_64:
1195 case R_390_PC12DBL:
1196 case R_390_PC16:
1197 case R_390_PC16DBL:
1198 case R_390_PC24DBL:
1199 case R_390_PC32:
1200 case R_390_PC32DBL:
1201 case R_390_PC64:
1202 if (h != NULL)
1203 {
1204 /* If this reloc is in a read-only section, we might
1205 need a copy reloc. We can't check reliably at this
1206 stage whether the section is read-only, as input
1207 sections have not yet been mapped to output sections.
1208 Tentatively set the flag for now, and correct in
1209 adjust_dynamic_symbol. */
1210 h->non_got_ref = 1;
1211
1212 if (!info->shared)
1213 {
1214 /* We may need a .plt entry if the function this reloc
1215 refers to is in a shared lib. */
1216 h->plt.refcount += 1;
1217 }
1218 }
1219
1220 /* If we are creating a shared library, and this is a reloc
1221 against a global symbol, or a non PC relative reloc
1222 against a local symbol, then we need to copy the reloc
1223 into the shared library. However, if we are linking with
1224 -Bsymbolic, we do not need to copy a reloc against a
1225 global symbol which is defined in an object we are
1226 including in the link (i.e., DEF_REGULAR is set). At
1227 this point we have not seen all the input files, so it is
1228 possible that DEF_REGULAR is not set now but will be set
1229 later (it is never cleared). In case of a weak definition,
1230 DEF_REGULAR may be cleared later by a strong definition in
1231 a shared library. We account for that possibility below by
1232 storing information in the relocs_copied field of the hash
1233 table entry. A similar situation occurs when creating
1234 shared libraries and symbol visibility changes render the
1235 symbol local.
1236
1237 If on the other hand, we are creating an executable, we
1238 may need to keep relocations for symbols satisfied by a
1239 dynamic library if we manage to avoid copy relocs for the
1240 symbol. */
1241 if ((info->shared
1242 && (sec->flags & SEC_ALLOC) != 0
1243 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1244 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1245 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1246 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1247 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1248 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1249 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1250 || (h != NULL
1251 && (! SYMBOLIC_BIND (info, h)
1252 || h->root.type == bfd_link_hash_defweak
1253 || !h->def_regular))))
1254 || (ELIMINATE_COPY_RELOCS
1255 && !info->shared
1256 && (sec->flags & SEC_ALLOC) != 0
1257 && h != NULL
1258 && (h->root.type == bfd_link_hash_defweak
1259 || !h->def_regular)))
1260 {
1261 struct elf_dyn_relocs *p;
1262 struct elf_dyn_relocs **head;
1263
1264 /* We must copy these reloc types into the output file.
1265 Create a reloc section in dynobj and make room for
1266 this reloc. */
1267 if (sreloc == NULL)
1268 {
1269 if (htab->elf.dynobj == NULL)
1270 htab->elf.dynobj = abfd;
1271
1272 sreloc = _bfd_elf_make_dynamic_reloc_section
1273 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1274
1275 if (sreloc == NULL)
1276 return FALSE;
1277 }
1278
1279 /* If this is a global symbol, we count the number of
1280 relocations we need for this symbol. */
1281 if (h != NULL)
1282 {
1283 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1284 }
1285 else
1286 {
1287 /* Track dynamic relocs needed for local syms too.
1288 We really need local syms available to do this
1289 easily. Oh well. */
1290 asection *s;
1291 void *vpp;
1292
1293 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1294 abfd, r_symndx);
1295 if (isym == NULL)
1296 return FALSE;
1297
1298 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1299 if (s == NULL)
1300 s = sec;
1301
1302 vpp = &elf_section_data (s)->local_dynrel;
1303 head = (struct elf_dyn_relocs **) vpp;
1304 }
1305
1306 p = *head;
1307 if (p == NULL || p->sec != sec)
1308 {
1309 bfd_size_type amt = sizeof *p;
1310 p = ((struct elf_dyn_relocs *)
1311 bfd_alloc (htab->elf.dynobj, amt));
1312 if (p == NULL)
1313 return FALSE;
1314 p->next = *head;
1315 *head = p;
1316 p->sec = sec;
1317 p->count = 0;
1318 p->pc_count = 0;
1319 }
1320
1321 p->count += 1;
1322 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1323 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1324 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1325 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1326 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1327 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1328 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1329 p->pc_count += 1;
1330 }
1331 break;
1332
1333 /* This relocation describes the C++ object vtable hierarchy.
1334 Reconstruct it for later use during GC. */
1335 case R_390_GNU_VTINHERIT:
1336 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1337 return FALSE;
1338 break;
1339
1340 /* This relocation describes which C++ vtable entries are actually
1341 used. Record for later use during GC. */
1342 case R_390_GNU_VTENTRY:
1343 BFD_ASSERT (h != NULL);
1344 if (h != NULL
1345 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1346 return FALSE;
1347 break;
1348
1349 default:
1350 break;
1351 }
1352 }
1353
1354 return TRUE;
1355 }
1356
1357 /* Return the section that should be marked against GC for a given
1358 relocation. */
1359
1360 static asection *
1361 elf_s390_gc_mark_hook (asection *sec,
1362 struct bfd_link_info *info,
1363 Elf_Internal_Rela *rel,
1364 struct elf_link_hash_entry *h,
1365 Elf_Internal_Sym *sym)
1366 {
1367 if (h != NULL)
1368 switch (ELF64_R_TYPE (rel->r_info))
1369 {
1370 case R_390_GNU_VTINHERIT:
1371 case R_390_GNU_VTENTRY:
1372 return NULL;
1373 }
1374
1375 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1376 }
1377
1378 /* Update the got entry reference counts for the section being removed. */
1379
1380 static bfd_boolean
1381 elf_s390_gc_sweep_hook (bfd *abfd,
1382 struct bfd_link_info *info,
1383 asection *sec,
1384 const Elf_Internal_Rela *relocs)
1385 {
1386 struct elf_s390_link_hash_table *htab;
1387 Elf_Internal_Shdr *symtab_hdr;
1388 struct elf_link_hash_entry **sym_hashes;
1389 bfd_signed_vma *local_got_refcounts;
1390 const Elf_Internal_Rela *rel, *relend;
1391
1392 if (info->relocatable)
1393 return TRUE;
1394
1395 htab = elf_s390_hash_table (info);
1396 if (htab == NULL)
1397 return FALSE;
1398
1399 elf_section_data (sec)->local_dynrel = NULL;
1400
1401 symtab_hdr = &elf_symtab_hdr (abfd);
1402 sym_hashes = elf_sym_hashes (abfd);
1403 local_got_refcounts = elf_local_got_refcounts (abfd);
1404
1405 relend = relocs + sec->reloc_count;
1406 for (rel = relocs; rel < relend; rel++)
1407 {
1408 unsigned long r_symndx;
1409 unsigned int r_type;
1410 struct elf_link_hash_entry *h = NULL;
1411
1412 r_symndx = ELF64_R_SYM (rel->r_info);
1413 if (r_symndx >= symtab_hdr->sh_info)
1414 {
1415 struct elf_s390_link_hash_entry *eh;
1416 struct elf_dyn_relocs **pp;
1417 struct elf_dyn_relocs *p;
1418
1419 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1420 while (h->root.type == bfd_link_hash_indirect
1421 || h->root.type == bfd_link_hash_warning)
1422 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1423 eh = (struct elf_s390_link_hash_entry *) h;
1424
1425 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1426 if (p->sec == sec)
1427 {
1428 /* Everything must go for SEC. */
1429 *pp = p->next;
1430 break;
1431 }
1432 }
1433 else
1434 {
1435 Elf_Internal_Sym *isym;
1436
1437 /* A local symbol. */
1438 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1439 abfd, r_symndx);
1440 if (isym == NULL)
1441 return FALSE;
1442
1443 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1444 {
1445 struct plt_entry *plt = elf_s390_local_plt (abfd);
1446 if (plt[r_symndx].plt.refcount > 0)
1447 plt[r_symndx].plt.refcount--;
1448 }
1449 }
1450
1451 r_type = ELF64_R_TYPE (rel->r_info);
1452 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1453 switch (r_type)
1454 {
1455 case R_390_TLS_LDM64:
1456 if (htab->tls_ldm_got.refcount > 0)
1457 htab->tls_ldm_got.refcount -= 1;
1458 break;
1459
1460 case R_390_TLS_GD64:
1461 case R_390_TLS_IE64:
1462 case R_390_TLS_GOTIE12:
1463 case R_390_TLS_GOTIE20:
1464 case R_390_TLS_GOTIE64:
1465 case R_390_TLS_IEENT:
1466 case R_390_GOT12:
1467 case R_390_GOT16:
1468 case R_390_GOT20:
1469 case R_390_GOT32:
1470 case R_390_GOT64:
1471 case R_390_GOTOFF16:
1472 case R_390_GOTOFF32:
1473 case R_390_GOTOFF64:
1474 case R_390_GOTPC:
1475 case R_390_GOTPCDBL:
1476 case R_390_GOTENT:
1477 if (h != NULL)
1478 {
1479 if (h->got.refcount > 0)
1480 h->got.refcount -= 1;
1481 }
1482 else if (local_got_refcounts != NULL)
1483 {
1484 if (local_got_refcounts[r_symndx] > 0)
1485 local_got_refcounts[r_symndx] -= 1;
1486 }
1487 break;
1488
1489 case R_390_8:
1490 case R_390_12:
1491 case R_390_16:
1492 case R_390_20:
1493 case R_390_32:
1494 case R_390_64:
1495 case R_390_PC16:
1496 case R_390_PC12DBL:
1497 case R_390_PC16DBL:
1498 case R_390_PC24DBL:
1499 case R_390_PC32:
1500 case R_390_PC32DBL:
1501 case R_390_PC64:
1502 if (info->shared)
1503 break;
1504 /* Fall through */
1505
1506 case R_390_PLT12DBL:
1507 case R_390_PLT16DBL:
1508 case R_390_PLT24DBL:
1509 case R_390_PLT32:
1510 case R_390_PLT32DBL:
1511 case R_390_PLT64:
1512 case R_390_PLTOFF16:
1513 case R_390_PLTOFF32:
1514 case R_390_PLTOFF64:
1515 if (h != NULL)
1516 {
1517 if (h->plt.refcount > 0)
1518 h->plt.refcount -= 1;
1519 }
1520 break;
1521
1522 case R_390_GOTPLT12:
1523 case R_390_GOTPLT16:
1524 case R_390_GOTPLT20:
1525 case R_390_GOTPLT32:
1526 case R_390_GOTPLT64:
1527 case R_390_GOTPLTENT:
1528 if (h != NULL)
1529 {
1530 if (h->plt.refcount > 0)
1531 {
1532 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1533 h->plt.refcount -= 1;
1534 }
1535 }
1536 else if (local_got_refcounts != NULL)
1537 {
1538 if (local_got_refcounts[r_symndx] > 0)
1539 local_got_refcounts[r_symndx] -= 1;
1540 }
1541 break;
1542
1543 default:
1544 break;
1545 }
1546 }
1547
1548 return TRUE;
1549 }
1550
1551 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1552 entry but we found we will not create any. Called when we find we will
1553 not have any PLT for this symbol, by for example
1554 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1555 or elf_s390_size_dynamic_sections if no dynamic sections will be
1556 created (we're only linking static objects). */
1557
1558 static void
1559 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1560 {
1561 if (h->elf.root.type == bfd_link_hash_warning)
1562 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1563
1564 if (h->gotplt_refcount <= 0)
1565 return;
1566
1567 /* We simply add the number of gotplt references to the number
1568 * of got references for this symbol. */
1569 h->elf.got.refcount += h->gotplt_refcount;
1570 h->gotplt_refcount = -1;
1571 }
1572
1573 /* Adjust a symbol defined by a dynamic object and referenced by a
1574 regular object. The current definition is in some section of the
1575 dynamic object, but we're not including those sections. We have to
1576 change the definition to something the rest of the link can
1577 understand. */
1578
1579 static bfd_boolean
1580 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1581 struct elf_link_hash_entry *h)
1582 {
1583 struct elf_s390_link_hash_table *htab;
1584 asection *s;
1585
1586 /* STT_GNU_IFUNC symbol must go through PLT. */
1587 if (s390_is_ifunc_symbol_p (h))
1588 return TRUE;
1589
1590 /* If this is a function, put it in the procedure linkage table. We
1591 will fill in the contents of the procedure linkage table later
1592 (although we could actually do it here). */
1593 if (h->type == STT_FUNC
1594 || h->needs_plt)
1595 {
1596 if (h->plt.refcount <= 0
1597 || SYMBOL_CALLS_LOCAL (info, h)
1598 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1599 && h->root.type == bfd_link_hash_undefweak))
1600 {
1601 /* This case can occur if we saw a PLT32 reloc in an input
1602 file, but the symbol was never referred to by a dynamic
1603 object, or if all references were garbage collected. In
1604 such a case, we don't actually need to build a procedure
1605 linkage table, and we can just do a PC32 reloc instead. */
1606 h->plt.offset = (bfd_vma) -1;
1607 h->needs_plt = 0;
1608 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1609 }
1610
1611 return TRUE;
1612 }
1613 else
1614 /* It's possible that we incorrectly decided a .plt reloc was
1615 needed for an R_390_PC32 reloc to a non-function sym in
1616 check_relocs. We can't decide accurately between function and
1617 non-function syms in check-relocs; Objects loaded later in
1618 the link may change h->type. So fix it now. */
1619 h->plt.offset = (bfd_vma) -1;
1620
1621 /* If this is a weak symbol, and there is a real definition, the
1622 processor independent code will have arranged for us to see the
1623 real definition first, and we can just use the same value. */
1624 if (h->u.weakdef != NULL)
1625 {
1626 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1627 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1628 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1629 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1630 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1631 h->non_got_ref = h->u.weakdef->non_got_ref;
1632 return TRUE;
1633 }
1634
1635 /* This is a reference to a symbol defined by a dynamic object which
1636 is not a function. */
1637
1638 /* If we are creating a shared library, we must presume that the
1639 only references to the symbol are via the global offset table.
1640 For such cases we need not do anything here; the relocations will
1641 be handled correctly by relocate_section. */
1642 if (info->shared)
1643 return TRUE;
1644
1645 /* If there are no references to this symbol that do not use the
1646 GOT, we don't need to generate a copy reloc. */
1647 if (!h->non_got_ref)
1648 return TRUE;
1649
1650 /* If -z nocopyreloc was given, we won't generate them either. */
1651 if (info->nocopyreloc)
1652 {
1653 h->non_got_ref = 0;
1654 return TRUE;
1655 }
1656
1657 if (ELIMINATE_COPY_RELOCS)
1658 {
1659 struct elf_s390_link_hash_entry * eh;
1660 struct elf_dyn_relocs *p;
1661
1662 eh = (struct elf_s390_link_hash_entry *) h;
1663 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1664 {
1665 s = p->sec->output_section;
1666 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1667 break;
1668 }
1669
1670 /* If we didn't find any dynamic relocs in read-only sections, then
1671 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1672 if (p == NULL)
1673 {
1674 h->non_got_ref = 0;
1675 return TRUE;
1676 }
1677 }
1678
1679 /* We must allocate the symbol in our .dynbss section, which will
1680 become part of the .bss section of the executable. There will be
1681 an entry for this symbol in the .dynsym section. The dynamic
1682 object will contain position independent code, so all references
1683 from the dynamic object to this symbol will go through the global
1684 offset table. The dynamic linker will use the .dynsym entry to
1685 determine the address it must put in the global offset table, so
1686 both the dynamic object and the regular object will refer to the
1687 same memory location for the variable. */
1688
1689 htab = elf_s390_hash_table (info);
1690 if (htab == NULL)
1691 return FALSE;
1692
1693 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1694 copy the initial value out of the dynamic object and into the
1695 runtime process image. */
1696 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1697 {
1698 htab->srelbss->size += sizeof (Elf64_External_Rela);
1699 h->needs_copy = 1;
1700 }
1701
1702 s = htab->sdynbss;
1703
1704 return _bfd_elf_adjust_dynamic_copy (h, s);
1705 }
1706
1707 /* Allocate space in .plt, .got and associated reloc sections for
1708 dynamic relocs. */
1709
1710 static bfd_boolean
1711 allocate_dynrelocs (struct elf_link_hash_entry *h,
1712 void * inf)
1713 {
1714 struct bfd_link_info *info;
1715 struct elf_s390_link_hash_table *htab;
1716 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1717 struct elf_dyn_relocs *p;
1718
1719 if (h->root.type == bfd_link_hash_indirect)
1720 return TRUE;
1721
1722 info = (struct bfd_link_info *) inf;
1723 htab = elf_s390_hash_table (info);
1724 if (htab == NULL)
1725 return FALSE;
1726
1727 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1728 here if it is defined and referenced in a non-shared object. */
1729 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1730 return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1731 &eh->dyn_relocs);
1732 else if (htab->elf.dynamic_sections_created
1733 && h->plt.refcount > 0)
1734 {
1735 /* Make sure this symbol is output as a dynamic symbol.
1736 Undefined weak syms won't yet be marked as dynamic. */
1737 if (h->dynindx == -1
1738 && !h->forced_local)
1739 {
1740 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1741 return FALSE;
1742 }
1743
1744 if (info->shared
1745 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1746 {
1747 asection *s = htab->elf.splt;
1748
1749 /* If this is the first .plt entry, make room for the special
1750 first entry. */
1751 if (s->size == 0)
1752 s->size += PLT_FIRST_ENTRY_SIZE;
1753
1754 h->plt.offset = s->size;
1755
1756 /* If this symbol is not defined in a regular file, and we are
1757 not generating a shared library, then set the symbol to this
1758 location in the .plt. This is required to make function
1759 pointers compare as equal between the normal executable and
1760 the shared library. */
1761 if (! info->shared
1762 && !h->def_regular)
1763 {
1764 h->root.u.def.section = s;
1765 h->root.u.def.value = h->plt.offset;
1766 }
1767
1768 /* Make room for this entry. */
1769 s->size += PLT_ENTRY_SIZE;
1770
1771 /* We also need to make an entry in the .got.plt section, which
1772 will be placed in the .got section by the linker script. */
1773 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1774
1775 /* We also need to make an entry in the .rela.plt section. */
1776 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1777 }
1778 else
1779 {
1780 h->plt.offset = (bfd_vma) -1;
1781 h->needs_plt = 0;
1782 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1783 }
1784 }
1785 else
1786 {
1787 h->plt.offset = (bfd_vma) -1;
1788 h->needs_plt = 0;
1789 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1790 }
1791
1792 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1793 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1794 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1795 we can save the dynamic TLS relocation. */
1796 if (h->got.refcount > 0
1797 && !info->shared
1798 && h->dynindx == -1
1799 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1800 {
1801 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1802 /* For the GOTIE access without a literal pool entry the offset has
1803 to be stored somewhere. The immediate value in the instruction
1804 is not bit enough so the value is stored in the got. */
1805 {
1806 h->got.offset = htab->elf.sgot->size;
1807 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1808 }
1809 else
1810 h->got.offset = (bfd_vma) -1;
1811 }
1812 else if (h->got.refcount > 0)
1813 {
1814 asection *s;
1815 bfd_boolean dyn;
1816 int tls_type = elf_s390_hash_entry(h)->tls_type;
1817
1818 /* Make sure this symbol is output as a dynamic symbol.
1819 Undefined weak syms won't yet be marked as dynamic. */
1820 if (h->dynindx == -1
1821 && !h->forced_local)
1822 {
1823 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1824 return FALSE;
1825 }
1826
1827 s = htab->elf.sgot;
1828 h->got.offset = s->size;
1829 s->size += GOT_ENTRY_SIZE;
1830 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1831 if (tls_type == GOT_TLS_GD)
1832 s->size += GOT_ENTRY_SIZE;
1833 dyn = htab->elf.dynamic_sections_created;
1834 /* R_390_TLS_IE64 needs one dynamic relocation,
1835 R_390_TLS_GD64 needs one if local symbol and two if global. */
1836 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1837 || tls_type >= GOT_TLS_IE)
1838 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1839 else if (tls_type == GOT_TLS_GD)
1840 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1841 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1842 || h->root.type != bfd_link_hash_undefweak)
1843 && (info->shared
1844 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1845 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1846 }
1847 else
1848 h->got.offset = (bfd_vma) -1;
1849
1850 if (eh->dyn_relocs == NULL)
1851 return TRUE;
1852
1853 /* In the shared -Bsymbolic case, discard space allocated for
1854 dynamic pc-relative relocs against symbols which turn out to be
1855 defined in regular objects. For the normal shared case, discard
1856 space for pc-relative relocs that have become local due to symbol
1857 visibility changes. */
1858
1859 if (info->shared)
1860 {
1861 if (SYMBOL_CALLS_LOCAL (info, h))
1862 {
1863 struct elf_dyn_relocs **pp;
1864
1865 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1866 {
1867 p->count -= p->pc_count;
1868 p->pc_count = 0;
1869 if (p->count == 0)
1870 *pp = p->next;
1871 else
1872 pp = &p->next;
1873 }
1874 }
1875
1876 /* Also discard relocs on undefined weak syms with non-default
1877 visibility. */
1878 if (eh->dyn_relocs != NULL
1879 && h->root.type == bfd_link_hash_undefweak)
1880 {
1881 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1882 eh->dyn_relocs = NULL;
1883
1884 /* Make sure undefined weak symbols are output as a dynamic
1885 symbol in PIEs. */
1886 else if (h->dynindx == -1
1887 && !h->forced_local)
1888 {
1889 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1890 return FALSE;
1891 }
1892 }
1893 }
1894 else if (ELIMINATE_COPY_RELOCS)
1895 {
1896 /* For the non-shared case, discard space for relocs against
1897 symbols which turn out to need copy relocs or are not
1898 dynamic. */
1899
1900 if (!h->non_got_ref
1901 && ((h->def_dynamic
1902 && !h->def_regular)
1903 || (htab->elf.dynamic_sections_created
1904 && (h->root.type == bfd_link_hash_undefweak
1905 || h->root.type == bfd_link_hash_undefined))))
1906 {
1907 /* Make sure this symbol is output as a dynamic symbol.
1908 Undefined weak syms won't yet be marked as dynamic. */
1909 if (h->dynindx == -1
1910 && !h->forced_local)
1911 {
1912 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1913 return FALSE;
1914 }
1915
1916 /* If that succeeded, we know we'll be keeping all the
1917 relocs. */
1918 if (h->dynindx != -1)
1919 goto keep;
1920 }
1921
1922 eh->dyn_relocs = NULL;
1923
1924 keep: ;
1925 }
1926
1927 /* Finally, allocate space. */
1928 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1929 {
1930 asection *sreloc = elf_section_data (p->sec)->sreloc;
1931 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1932 }
1933
1934 return TRUE;
1935 }
1936
1937 /* Find any dynamic relocs that apply to read-only sections. */
1938
1939 static bfd_boolean
1940 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1941 {
1942 struct elf_s390_link_hash_entry *eh;
1943 struct elf_dyn_relocs *p;
1944
1945 eh = (struct elf_s390_link_hash_entry *) h;
1946 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1947 {
1948 asection *s = p->sec->output_section;
1949
1950 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1951 {
1952 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1953
1954 info->flags |= DF_TEXTREL;
1955
1956 /* Not an error, just cut short the traversal. */
1957 return FALSE;
1958 }
1959 }
1960 return TRUE;
1961 }
1962
1963 /* Set the sizes of the dynamic sections. */
1964
1965 static bfd_boolean
1966 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1967 struct bfd_link_info *info)
1968 {
1969 struct elf_s390_link_hash_table *htab;
1970 bfd *dynobj;
1971 asection *s;
1972 bfd_boolean relocs;
1973 bfd *ibfd;
1974
1975 htab = elf_s390_hash_table (info);
1976 if (htab == NULL)
1977 return FALSE;
1978
1979 dynobj = htab->elf.dynobj;
1980 if (dynobj == NULL)
1981 abort ();
1982
1983 if (htab->elf.dynamic_sections_created)
1984 {
1985 /* Set the contents of the .interp section to the interpreter. */
1986 if (info->executable)
1987 {
1988 s = bfd_get_linker_section (dynobj, ".interp");
1989 if (s == NULL)
1990 abort ();
1991 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1992 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1993 }
1994 }
1995
1996 /* Set up .got offsets for local syms, and space for local dynamic
1997 relocs. */
1998 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1999 {
2000 bfd_signed_vma *local_got;
2001 bfd_signed_vma *end_local_got;
2002 char *local_tls_type;
2003 bfd_size_type locsymcount;
2004 Elf_Internal_Shdr *symtab_hdr;
2005 asection *srela;
2006 struct plt_entry *local_plt;
2007 unsigned int i;
2008
2009 if (! is_s390_elf (ibfd))
2010 continue;
2011
2012 for (s = ibfd->sections; s != NULL; s = s->next)
2013 {
2014 struct elf_dyn_relocs *p;
2015
2016 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2017 {
2018 if (!bfd_is_abs_section (p->sec)
2019 && bfd_is_abs_section (p->sec->output_section))
2020 {
2021 /* Input section has been discarded, either because
2022 it is a copy of a linkonce section or due to
2023 linker script /DISCARD/, so we'll be discarding
2024 the relocs too. */
2025 }
2026 else if (p->count != 0)
2027 {
2028 srela = elf_section_data (p->sec)->sreloc;
2029 srela->size += p->count * sizeof (Elf64_External_Rela);
2030 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2031 info->flags |= DF_TEXTREL;
2032 }
2033 }
2034 }
2035
2036 local_got = elf_local_got_refcounts (ibfd);
2037 if (!local_got)
2038 continue;
2039
2040 symtab_hdr = &elf_symtab_hdr (ibfd);
2041 locsymcount = symtab_hdr->sh_info;
2042 end_local_got = local_got + locsymcount;
2043 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2044 s = htab->elf.sgot;
2045 srela = htab->elf.srelgot;
2046 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2047 {
2048 if (*local_got > 0)
2049 {
2050 *local_got = s->size;
2051 s->size += GOT_ENTRY_SIZE;
2052 if (*local_tls_type == GOT_TLS_GD)
2053 s->size += GOT_ENTRY_SIZE;
2054 if (info->shared)
2055 srela->size += sizeof (Elf64_External_Rela);
2056 }
2057 else
2058 *local_got = (bfd_vma) -1;
2059 }
2060
2061 local_plt = elf_s390_local_plt (ibfd);
2062 for (i = 0; i < symtab_hdr->sh_info; i++)
2063 {
2064 if (local_plt[i].plt.refcount > 0)
2065 {
2066 local_plt[i].plt.offset = htab->elf.iplt->size;
2067 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2068 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2069 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2070 }
2071 else
2072 local_plt[i].plt.offset = (bfd_vma) -1;
2073 }
2074 }
2075
2076 if (htab->tls_ldm_got.refcount > 0)
2077 {
2078 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2079 relocs. */
2080 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2081 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2082 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2083 }
2084 else
2085 htab->tls_ldm_got.offset = -1;
2086
2087 /* Allocate global sym .plt and .got entries, and space for global
2088 sym dynamic relocs. */
2089 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2090
2091 /* We now have determined the sizes of the various dynamic sections.
2092 Allocate memory for them. */
2093 relocs = FALSE;
2094 for (s = dynobj->sections; s != NULL; s = s->next)
2095 {
2096 if ((s->flags & SEC_LINKER_CREATED) == 0)
2097 continue;
2098
2099 if (s == htab->elf.splt
2100 || s == htab->elf.sgot
2101 || s == htab->elf.sgotplt
2102 || s == htab->sdynbss
2103 || s == htab->elf.iplt
2104 || s == htab->elf.igotplt
2105 || s == htab->irelifunc)
2106 {
2107 /* Strip this section if we don't need it; see the
2108 comment below. */
2109 }
2110 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2111 {
2112 if (s->size != 0 && s != htab->elf.srelplt)
2113 relocs = TRUE;
2114
2115 /* We use the reloc_count field as a counter if we need
2116 to copy relocs into the output file. */
2117 s->reloc_count = 0;
2118 }
2119 else
2120 {
2121 /* It's not one of our sections, so don't allocate space. */
2122 continue;
2123 }
2124
2125 if (s->size == 0)
2126 {
2127 /* If we don't need this section, strip it from the
2128 output file. This is to handle .rela.bss and
2129 .rela.plt. We must create it in
2130 create_dynamic_sections, because it must be created
2131 before the linker maps input sections to output
2132 sections. The linker does that before
2133 adjust_dynamic_symbol is called, and it is that
2134 function which decides whether anything needs to go
2135 into these sections. */
2136
2137 s->flags |= SEC_EXCLUDE;
2138 continue;
2139 }
2140
2141 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2142 continue;
2143
2144 /* Allocate memory for the section contents. We use bfd_zalloc
2145 here in case unused entries are not reclaimed before the
2146 section's contents are written out. This should not happen,
2147 but this way if it does, we get a R_390_NONE reloc instead
2148 of garbage. */
2149 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2150 if (s->contents == NULL)
2151 return FALSE;
2152 }
2153
2154 if (htab->elf.dynamic_sections_created)
2155 {
2156 /* Add some entries to the .dynamic section. We fill in the
2157 values later, in elf_s390_finish_dynamic_sections, but we
2158 must add the entries now so that we get the correct size for
2159 the .dynamic section. The DT_DEBUG entry is filled in by the
2160 dynamic linker and used by the debugger. */
2161 #define add_dynamic_entry(TAG, VAL) \
2162 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2163
2164 if (info->executable)
2165 {
2166 if (!add_dynamic_entry (DT_DEBUG, 0))
2167 return FALSE;
2168 }
2169
2170 if (htab->elf.splt->size != 0)
2171 {
2172 if (!add_dynamic_entry (DT_PLTGOT, 0)
2173 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2174 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2175 || !add_dynamic_entry (DT_JMPREL, 0))
2176 return FALSE;
2177 }
2178
2179 if (relocs)
2180 {
2181 if (!add_dynamic_entry (DT_RELA, 0)
2182 || !add_dynamic_entry (DT_RELASZ, 0)
2183 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2184 return FALSE;
2185
2186 /* If any dynamic relocs apply to a read-only section,
2187 then we need a DT_TEXTREL entry. */
2188 if ((info->flags & DF_TEXTREL) == 0)
2189 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2190 info);
2191
2192 if ((info->flags & DF_TEXTREL) != 0)
2193 {
2194 if (!add_dynamic_entry (DT_TEXTREL, 0))
2195 return FALSE;
2196 }
2197 }
2198 }
2199 #undef add_dynamic_entry
2200
2201 return TRUE;
2202 }
2203
2204 /* Return the base VMA address which should be subtracted from real addresses
2205 when resolving @dtpoff relocation.
2206 This is PT_TLS segment p_vaddr. */
2207
2208 static bfd_vma
2209 dtpoff_base (struct bfd_link_info *info)
2210 {
2211 /* If tls_sec is NULL, we should have signalled an error already. */
2212 if (elf_hash_table (info)->tls_sec == NULL)
2213 return 0;
2214 return elf_hash_table (info)->tls_sec->vma;
2215 }
2216
2217 /* Return the relocation value for @tpoff relocation
2218 if STT_TLS virtual address is ADDRESS. */
2219
2220 static bfd_vma
2221 tpoff (struct bfd_link_info *info, bfd_vma address)
2222 {
2223 struct elf_link_hash_table *htab = elf_hash_table (info);
2224
2225 /* If tls_sec is NULL, we should have signalled an error already. */
2226 if (htab->tls_sec == NULL)
2227 return 0;
2228 return htab->tls_size + htab->tls_sec->vma - address;
2229 }
2230
2231 /* Complain if TLS instruction relocation is against an invalid
2232 instruction. */
2233
2234 static void
2235 invalid_tls_insn (bfd *input_bfd,
2236 asection *input_section,
2237 Elf_Internal_Rela *rel)
2238 {
2239 reloc_howto_type *howto;
2240
2241 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2242 (*_bfd_error_handler)
2243 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2244 input_bfd,
2245 input_section,
2246 (long) rel->r_offset,
2247 howto->name);
2248 bfd_set_error (bfd_error_bad_value);
2249 }
2250
2251 /* Relocate a 390 ELF section. */
2252
2253 static bfd_boolean
2254 elf_s390_relocate_section (bfd *output_bfd,
2255 struct bfd_link_info *info,
2256 bfd *input_bfd,
2257 asection *input_section,
2258 bfd_byte *contents,
2259 Elf_Internal_Rela *relocs,
2260 Elf_Internal_Sym *local_syms,
2261 asection **local_sections)
2262 {
2263 struct elf_s390_link_hash_table *htab;
2264 Elf_Internal_Shdr *symtab_hdr;
2265 struct elf_link_hash_entry **sym_hashes;
2266 bfd_vma *local_got_offsets;
2267 Elf_Internal_Rela *rel;
2268 Elf_Internal_Rela *relend;
2269
2270 BFD_ASSERT (is_s390_elf (input_bfd));
2271
2272 htab = elf_s390_hash_table (info);
2273 if (htab == NULL)
2274 return FALSE;
2275
2276 symtab_hdr = &elf_symtab_hdr (input_bfd);
2277 sym_hashes = elf_sym_hashes (input_bfd);
2278 local_got_offsets = elf_local_got_offsets (input_bfd);
2279
2280 rel = relocs;
2281 relend = relocs + input_section->reloc_count;
2282 for (; rel < relend; rel++)
2283 {
2284 unsigned int r_type;
2285 reloc_howto_type *howto;
2286 unsigned long r_symndx;
2287 struct elf_link_hash_entry *h;
2288 Elf_Internal_Sym *sym;
2289 asection *sec;
2290 bfd_vma off;
2291 bfd_vma relocation;
2292 bfd_boolean unresolved_reloc;
2293 bfd_reloc_status_type r;
2294 int tls_type;
2295 asection *base_got = htab->elf.sgot;
2296
2297 r_type = ELF64_R_TYPE (rel->r_info);
2298 if (r_type == (int) R_390_GNU_VTINHERIT
2299 || r_type == (int) R_390_GNU_VTENTRY)
2300 continue;
2301 if (r_type >= (int) R_390_max)
2302 {
2303 bfd_set_error (bfd_error_bad_value);
2304 return FALSE;
2305 }
2306
2307 howto = elf_howto_table + r_type;
2308 r_symndx = ELF64_R_SYM (rel->r_info);
2309
2310 h = NULL;
2311 sym = NULL;
2312 sec = NULL;
2313 unresolved_reloc = FALSE;
2314 if (r_symndx < symtab_hdr->sh_info)
2315 {
2316 sym = local_syms + r_symndx;
2317 sec = local_sections[r_symndx];
2318
2319 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2320 {
2321 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2322 if (local_plt == NULL)
2323 return FALSE;
2324
2325 /* Address of the PLT slot. */
2326 relocation = (htab->elf.iplt->output_section->vma
2327 + htab->elf.iplt->output_offset
2328 + local_plt[r_symndx].plt.offset);
2329
2330 switch (r_type)
2331 {
2332 case R_390_PLTOFF16:
2333 case R_390_PLTOFF32:
2334 case R_390_PLTOFF64:
2335 relocation -= htab->elf.sgot->output_section->vma;
2336 break;
2337 case R_390_GOTPLT12:
2338 case R_390_GOTPLT16:
2339 case R_390_GOTPLT20:
2340 case R_390_GOTPLT32:
2341 case R_390_GOTPLT64:
2342 case R_390_GOTPLTENT:
2343 case R_390_GOT12:
2344 case R_390_GOT16:
2345 case R_390_GOT20:
2346 case R_390_GOT32:
2347 case R_390_GOT64:
2348 case R_390_GOTENT:
2349 {
2350 /* Write the PLT slot address into the GOT slot. */
2351 bfd_put_64 (output_bfd, relocation,
2352 htab->elf.sgot->contents +
2353 local_got_offsets[r_symndx]);
2354 relocation = (local_got_offsets[r_symndx] +
2355 htab->elf.sgot->output_offset);
2356
2357 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2358 relocation += htab->elf.sgot->output_section->vma;
2359 break;
2360 }
2361 default:
2362 break;
2363 }
2364 /* The output section is needed later in
2365 finish_dynamic_section when creating the dynamic
2366 relocation. */
2367 local_plt[r_symndx].sec = sec;
2368 goto do_relocation;
2369 }
2370 else
2371 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2372 }
2373 else
2374 {
2375 bfd_boolean warned ATTRIBUTE_UNUSED;
2376 bfd_boolean ignored ATTRIBUTE_UNUSED;
2377
2378 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2379 r_symndx, symtab_hdr, sym_hashes,
2380 h, sec, relocation,
2381 unresolved_reloc, warned, ignored);
2382 }
2383
2384 if (sec != NULL && discarded_section (sec))
2385 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2386 rel, 1, relend, howto, 0, contents);
2387
2388 if (info->relocatable)
2389 continue;
2390
2391 switch (r_type)
2392 {
2393 case R_390_GOTPLT12:
2394 case R_390_GOTPLT16:
2395 case R_390_GOTPLT20:
2396 case R_390_GOTPLT32:
2397 case R_390_GOTPLT64:
2398 case R_390_GOTPLTENT:
2399 /* There are three cases for a GOTPLT relocation. 1) The
2400 relocation is against the jump slot entry of a plt that
2401 will get emitted to the output file. 2) The relocation
2402 is against the jump slot of a plt entry that has been
2403 removed. elf_s390_adjust_gotplt has created a GOT entry
2404 as replacement. 3) The relocation is against a local symbol.
2405 Cases 2) and 3) are the same as the GOT relocation code
2406 so we just have to test for case 1 and fall through for
2407 the other two. */
2408 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2409 {
2410 bfd_vma plt_index;
2411
2412 if (s390_is_ifunc_symbol_p (h))
2413 {
2414 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2415 relocation = (plt_index * GOT_ENTRY_SIZE +
2416 htab->elf.igotplt->output_offset);
2417 if (r_type == R_390_GOTPLTENT)
2418 relocation += htab->elf.igotplt->output_section->vma;
2419 }
2420 else
2421 {
2422 /* Calc. index no.
2423 Current offset - size first entry / entry size. */
2424 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2425 PLT_ENTRY_SIZE;
2426
2427 /* Offset in GOT is PLT index plus GOT headers(3)
2428 times 4, addr & GOT addr. */
2429 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2430 if (r_type == R_390_GOTPLTENT)
2431 relocation += htab->elf.sgot->output_section->vma;
2432 }
2433 unresolved_reloc = FALSE;
2434 break;
2435 }
2436 /* Fall through. */
2437
2438 case R_390_GOT12:
2439 case R_390_GOT16:
2440 case R_390_GOT20:
2441 case R_390_GOT32:
2442 case R_390_GOT64:
2443 case R_390_GOTENT:
2444 /* Relocation is to the entry for this symbol in the global
2445 offset table. */
2446 if (base_got == NULL)
2447 abort ();
2448
2449 if (h != NULL)
2450 {
2451 bfd_boolean dyn;
2452
2453 off = h->got.offset;
2454 dyn = htab->elf.dynamic_sections_created;
2455
2456 if (s390_is_ifunc_symbol_p (h))
2457 {
2458 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2459 if (off == (bfd_vma)-1)
2460 {
2461 /* No explicit GOT usage so redirect to the
2462 got.iplt slot. */
2463 base_got = htab->elf.igotplt;
2464 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2465 }
2466 else
2467 {
2468 /* Explicit GOT slots must contain the address
2469 of the PLT slot. This will be handled in
2470 finish_dynamic_symbol. */
2471 }
2472 }
2473 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2474 || (info->shared
2475 && SYMBOL_REFERENCES_LOCAL (info, h))
2476 || (ELF_ST_VISIBILITY (h->other)
2477 && h->root.type == bfd_link_hash_undefweak))
2478 {
2479 /* This is actually a static link, or it is a
2480 -Bsymbolic link and the symbol is defined
2481 locally, or the symbol was forced to be local
2482 because of a version file. We must initialize
2483 this entry in the global offset table. Since the
2484 offset must always be a multiple of 2, we use the
2485 least significant bit to record whether we have
2486 initialized it already.
2487
2488 When doing a dynamic link, we create a .rel.got
2489 relocation entry to initialize the value. This
2490 is done in the finish_dynamic_symbol routine. */
2491 if ((off & 1) != 0)
2492 off &= ~1;
2493 else
2494 {
2495 bfd_put_64 (output_bfd, relocation,
2496 base_got->contents + off);
2497 h->got.offset |= 1;
2498 }
2499
2500 if ((h->def_regular
2501 && info->shared
2502 && SYMBOL_REFERENCES_LOCAL (info, h))
2503 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2504 && ((r_type == R_390_GOTENT
2505 && (bfd_get_16 (input_bfd,
2506 contents + rel->r_offset - 2)
2507 & 0xff0f) == 0xc408)
2508 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2509 || (r_type == R_390_GOT20
2510 && (bfd_get_32 (input_bfd,
2511 contents + rel->r_offset - 2)
2512 & 0xff00f000) == 0xe300c000
2513 && bfd_get_8 (input_bfd,
2514 contents + rel->r_offset + 3) == 0x04)))
2515
2516 {
2517 unsigned short new_insn =
2518 (0xc000 | (bfd_get_8 (input_bfd,
2519 contents + rel->r_offset - 1) & 0xf0));
2520 bfd_put_16 (output_bfd, new_insn,
2521 contents + rel->r_offset - 2);
2522 r_type = R_390_PC32DBL;
2523 rel->r_addend = 2;
2524 howto = elf_howto_table + r_type;
2525 relocation = h->root.u.def.value
2526 + h->root.u.def.section->output_section->vma
2527 + h->root.u.def.section->output_offset;
2528 goto do_relocation;
2529 }
2530 }
2531 else
2532 unresolved_reloc = FALSE;
2533 }
2534 else
2535 {
2536 if (local_got_offsets == NULL)
2537 abort ();
2538
2539 off = local_got_offsets[r_symndx];
2540
2541 /* The offset must always be a multiple of 8. We use
2542 the least significant bit to record whether we have
2543 already generated the necessary reloc. */
2544 if ((off & 1) != 0)
2545 off &= ~1;
2546 else
2547 {
2548 bfd_put_64 (output_bfd, relocation,
2549 htab->elf.sgot->contents + off);
2550
2551 if (info->shared)
2552 {
2553 asection *s;
2554 Elf_Internal_Rela outrel;
2555 bfd_byte *loc;
2556
2557 s = htab->elf.srelgot;
2558 if (s == NULL)
2559 abort ();
2560
2561 outrel.r_offset = (htab->elf.sgot->output_section->vma
2562 + htab->elf.sgot->output_offset
2563 + off);
2564 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2565 outrel.r_addend = relocation;
2566 loc = s->contents;
2567 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2568 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2569 }
2570
2571 local_got_offsets[r_symndx] |= 1;
2572 }
2573 }
2574
2575 if (off >= (bfd_vma) -2)
2576 abort ();
2577
2578 relocation = base_got->output_offset + off;
2579
2580 /* For @GOTENT the relocation is against the offset between
2581 the instruction and the symbols entry in the GOT and not
2582 between the start of the GOT and the symbols entry. We
2583 add the vma of the GOT to get the correct value. */
2584 if ( r_type == R_390_GOTENT
2585 || r_type == R_390_GOTPLTENT)
2586 relocation += base_got->output_section->vma;
2587
2588 break;
2589
2590 case R_390_GOTOFF16:
2591 case R_390_GOTOFF32:
2592 case R_390_GOTOFF64:
2593 /* Relocation is relative to the start of the global offset
2594 table. */
2595
2596 /* Note that sgot->output_offset is not involved in this
2597 calculation. We always want the start of .got. If we
2598 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2599 permitted by the ABI, we might have to change this
2600 calculation. */
2601 relocation -= htab->elf.sgot->output_section->vma;
2602 break;
2603
2604 case R_390_GOTPC:
2605 case R_390_GOTPCDBL:
2606 /* Use global offset table as symbol value. */
2607 relocation = htab->elf.sgot->output_section->vma;
2608 unresolved_reloc = FALSE;
2609 break;
2610
2611 case R_390_PLT12DBL:
2612 case R_390_PLT16DBL:
2613 case R_390_PLT24DBL:
2614 case R_390_PLT32:
2615 case R_390_PLT32DBL:
2616 case R_390_PLT64:
2617 /* Relocation is to the entry for this symbol in the
2618 procedure linkage table. */
2619
2620 /* Resolve a PLT32 reloc against a local symbol directly,
2621 without using the procedure linkage table. */
2622 if (h == NULL)
2623 break;
2624
2625 if (h->plt.offset == (bfd_vma) -1
2626 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2627 {
2628 /* We didn't make a PLT entry for this symbol. This
2629 happens when statically linking PIC code, or when
2630 using -Bsymbolic. */
2631 break;
2632 }
2633 if (s390_is_ifunc_symbol_p (h))
2634 relocation = (htab->elf.iplt->output_section->vma
2635 + htab->elf.iplt->output_offset
2636 + h->plt.offset);
2637 else
2638 relocation = (htab->elf.splt->output_section->vma
2639 + htab->elf.splt->output_offset
2640 + h->plt.offset);
2641 unresolved_reloc = FALSE;
2642 break;
2643
2644 case R_390_PLTOFF16:
2645 case R_390_PLTOFF32:
2646 case R_390_PLTOFF64:
2647 /* Relocation is to the entry for this symbol in the
2648 procedure linkage table relative to the start of the GOT. */
2649
2650 /* For local symbols or if we didn't make a PLT entry for
2651 this symbol resolve the symbol directly. */
2652 if (h == NULL
2653 || h->plt.offset == (bfd_vma) -1
2654 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2655 {
2656 relocation -= htab->elf.sgot->output_section->vma;
2657 break;
2658 }
2659
2660 if (s390_is_ifunc_symbol_p (h))
2661 relocation = (htab->elf.iplt->output_section->vma
2662 + htab->elf.iplt->output_offset
2663 + h->plt.offset
2664 - htab->elf.sgot->output_section->vma);
2665 else
2666 relocation = (htab->elf.splt->output_section->vma
2667 + htab->elf.splt->output_offset
2668 + h->plt.offset
2669 - htab->elf.sgot->output_section->vma);
2670 unresolved_reloc = FALSE;
2671 break;
2672
2673 case R_390_8:
2674 case R_390_16:
2675 case R_390_32:
2676 case R_390_64:
2677 case R_390_PC16:
2678 case R_390_PC12DBL:
2679 case R_390_PC16DBL:
2680 case R_390_PC24DBL:
2681 case R_390_PC32:
2682 case R_390_PC32DBL:
2683 case R_390_PC64:
2684
2685 if (h != NULL
2686 && s390_is_ifunc_symbol_p (h)
2687 && h->def_regular)
2688 {
2689 if (!info->shared || !h->non_got_ref)
2690 {
2691 /* For a non-shared object STT_GNU_IFUNC symbol must
2692 go through PLT. */
2693 relocation = (htab->elf.iplt->output_section->vma
2694 + htab->elf.iplt->output_offset
2695 + h ->plt.offset);
2696 goto do_relocation;
2697 }
2698 else
2699 {
2700 /* For shared objects a runtime relocation is needed. */
2701
2702 Elf_Internal_Rela outrel;
2703 asection *sreloc;
2704
2705 /* Need a dynamic relocation to get the real function
2706 address. */
2707 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2708 info,
2709 input_section,
2710 rel->r_offset);
2711 if (outrel.r_offset == (bfd_vma) -1
2712 || outrel.r_offset == (bfd_vma) -2)
2713 abort ();
2714
2715 outrel.r_offset += (input_section->output_section->vma
2716 + input_section->output_offset);
2717
2718 if (h->dynindx == -1
2719 || h->forced_local
2720 || info->executable)
2721 {
2722 /* This symbol is resolved locally. */
2723 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2724 outrel.r_addend = (h->root.u.def.value
2725 + h->root.u.def.section->output_section->vma
2726 + h->root.u.def.section->output_offset);
2727 }
2728 else
2729 {
2730 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2731 outrel.r_addend = 0;
2732 }
2733
2734 sreloc = htab->elf.irelifunc;
2735 elf_append_rela (output_bfd, sreloc, &outrel);
2736
2737 /* If this reloc is against an external symbol, we
2738 do not want to fiddle with the addend. Otherwise,
2739 we need to include the symbol value so that it
2740 becomes an addend for the dynamic reloc. For an
2741 internal symbol, we have updated addend. */
2742 continue;
2743 }
2744 }
2745
2746 if ((input_section->flags & SEC_ALLOC) == 0)
2747 break;
2748
2749 if ((info->shared
2750 && (h == NULL
2751 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2752 || h->root.type != bfd_link_hash_undefweak)
2753 && ((r_type != R_390_PC16
2754 && r_type != R_390_PC12DBL
2755 && r_type != R_390_PC16DBL
2756 && r_type != R_390_PC24DBL
2757 && r_type != R_390_PC32
2758 && r_type != R_390_PC32DBL
2759 && r_type != R_390_PC64)
2760 || !SYMBOL_CALLS_LOCAL (info, h)))
2761 || (ELIMINATE_COPY_RELOCS
2762 && !info->shared
2763 && h != NULL
2764 && h->dynindx != -1
2765 && !h->non_got_ref
2766 && ((h->def_dynamic
2767 && !h->def_regular)
2768 || h->root.type == bfd_link_hash_undefweak
2769 || h->root.type == bfd_link_hash_undefined)))
2770 {
2771 Elf_Internal_Rela outrel;
2772 bfd_boolean skip, relocate;
2773 asection *sreloc;
2774 bfd_byte *loc;
2775
2776 /* When generating a shared object, these relocations
2777 are copied into the output file to be resolved at run
2778 time. */
2779 skip = FALSE;
2780 relocate = FALSE;
2781
2782 outrel.r_offset =
2783 _bfd_elf_section_offset (output_bfd, info, input_section,
2784 rel->r_offset);
2785 if (outrel.r_offset == (bfd_vma) -1)
2786 skip = TRUE;
2787 else if (outrel.r_offset == (bfd_vma) -2)
2788 skip = TRUE, relocate = TRUE;
2789
2790 outrel.r_offset += (input_section->output_section->vma
2791 + input_section->output_offset);
2792
2793 if (skip)
2794 memset (&outrel, 0, sizeof outrel);
2795 else if (h != NULL
2796 && h->dynindx != -1
2797 && (r_type == R_390_PC16
2798 || r_type == R_390_PC12DBL
2799 || r_type == R_390_PC16DBL
2800 || r_type == R_390_PC24DBL
2801 || r_type == R_390_PC32
2802 || r_type == R_390_PC32DBL
2803 || r_type == R_390_PC64
2804 || !info->shared
2805 || !SYMBOLIC_BIND (info, h)
2806 || !h->def_regular))
2807 {
2808 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2809 outrel.r_addend = rel->r_addend;
2810 }
2811 else
2812 {
2813 /* This symbol is local, or marked to become local. */
2814 outrel.r_addend = relocation + rel->r_addend;
2815 if (r_type == R_390_64)
2816 {
2817 relocate = TRUE;
2818 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2819 }
2820 else
2821 {
2822 long sindx;
2823
2824 if (bfd_is_abs_section (sec))
2825 sindx = 0;
2826 else if (sec == NULL || sec->owner == NULL)
2827 {
2828 bfd_set_error(bfd_error_bad_value);
2829 return FALSE;
2830 }
2831 else
2832 {
2833 asection *osec;
2834
2835 osec = sec->output_section;
2836 sindx = elf_section_data (osec)->dynindx;
2837
2838 if (sindx == 0)
2839 {
2840 osec = htab->elf.text_index_section;
2841 sindx = elf_section_data (osec)->dynindx;
2842 }
2843 BFD_ASSERT (sindx != 0);
2844
2845 /* We are turning this relocation into one
2846 against a section symbol, so subtract out
2847 the output section's address but not the
2848 offset of the input section in the output
2849 section. */
2850 outrel.r_addend -= osec->vma;
2851 }
2852 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2853 }
2854 }
2855
2856 sreloc = elf_section_data (input_section)->sreloc;
2857 if (sreloc == NULL)
2858 abort ();
2859
2860 loc = sreloc->contents;
2861 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2862 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2863
2864 /* If this reloc is against an external symbol, we do
2865 not want to fiddle with the addend. Otherwise, we
2866 need to include the symbol value so that it becomes
2867 an addend for the dynamic reloc. */
2868 if (! relocate)
2869 continue;
2870 }
2871
2872 break;
2873
2874 /* Relocations for tls literal pool entries. */
2875 case R_390_TLS_IE64:
2876 if (info->shared)
2877 {
2878 Elf_Internal_Rela outrel;
2879 asection *sreloc;
2880 bfd_byte *loc;
2881
2882 outrel.r_offset = rel->r_offset
2883 + input_section->output_section->vma
2884 + input_section->output_offset;
2885 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2886 sreloc = elf_section_data (input_section)->sreloc;
2887 if (sreloc == NULL)
2888 abort ();
2889 loc = sreloc->contents;
2890 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2891 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2892 }
2893 /* Fall through. */
2894
2895 case R_390_TLS_GD64:
2896 case R_390_TLS_GOTIE64:
2897 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2898 tls_type = GOT_UNKNOWN;
2899 if (h == NULL && local_got_offsets)
2900 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2901 else if (h != NULL)
2902 {
2903 tls_type = elf_s390_hash_entry(h)->tls_type;
2904 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2905 r_type = R_390_TLS_LE64;
2906 }
2907 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2908 r_type = R_390_TLS_IE64;
2909
2910 if (r_type == R_390_TLS_LE64)
2911 {
2912 /* This relocation gets optimized away by the local exec
2913 access optimization. */
2914 BFD_ASSERT (! unresolved_reloc);
2915 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2916 contents + rel->r_offset);
2917 continue;
2918 }
2919
2920 if (htab->elf.sgot == NULL)
2921 abort ();
2922
2923 if (h != NULL)
2924 off = h->got.offset;
2925 else
2926 {
2927 if (local_got_offsets == NULL)
2928 abort ();
2929
2930 off = local_got_offsets[r_symndx];
2931 }
2932
2933 emit_tls_relocs:
2934
2935 if ((off & 1) != 0)
2936 off &= ~1;
2937 else
2938 {
2939 Elf_Internal_Rela outrel;
2940 bfd_byte *loc;
2941 int dr_type, indx;
2942
2943 if (htab->elf.srelgot == NULL)
2944 abort ();
2945
2946 outrel.r_offset = (htab->elf.sgot->output_section->vma
2947 + htab->elf.sgot->output_offset + off);
2948
2949 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2950 if (r_type == R_390_TLS_GD64)
2951 dr_type = R_390_TLS_DTPMOD;
2952 else
2953 dr_type = R_390_TLS_TPOFF;
2954 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2955 outrel.r_addend = relocation - dtpoff_base (info);
2956 else
2957 outrel.r_addend = 0;
2958 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2959 loc = htab->elf.srelgot->contents;
2960 loc += htab->elf.srelgot->reloc_count++
2961 * sizeof (Elf64_External_Rela);
2962 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2963
2964 if (r_type == R_390_TLS_GD64)
2965 {
2966 if (indx == 0)
2967 {
2968 BFD_ASSERT (! unresolved_reloc);
2969 bfd_put_64 (output_bfd,
2970 relocation - dtpoff_base (info),
2971 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2972 }
2973 else
2974 {
2975 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2976 outrel.r_offset += GOT_ENTRY_SIZE;
2977 outrel.r_addend = 0;
2978 htab->elf.srelgot->reloc_count++;
2979 loc += sizeof (Elf64_External_Rela);
2980 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2981 }
2982 }
2983
2984 if (h != NULL)
2985 h->got.offset |= 1;
2986 else
2987 local_got_offsets[r_symndx] |= 1;
2988 }
2989
2990 if (off >= (bfd_vma) -2)
2991 abort ();
2992 if (r_type == ELF64_R_TYPE (rel->r_info))
2993 {
2994 relocation = htab->elf.sgot->output_offset + off;
2995 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2996 relocation += htab->elf.sgot->output_section->vma;
2997 unresolved_reloc = FALSE;
2998 }
2999 else
3000 {
3001 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3002 contents + rel->r_offset);
3003 continue;
3004 }
3005 break;
3006
3007 case R_390_TLS_GOTIE12:
3008 case R_390_TLS_GOTIE20:
3009 case R_390_TLS_IEENT:
3010 if (h == NULL)
3011 {
3012 if (local_got_offsets == NULL)
3013 abort();
3014 off = local_got_offsets[r_symndx];
3015 if (info->shared)
3016 goto emit_tls_relocs;
3017 }
3018 else
3019 {
3020 off = h->got.offset;
3021 tls_type = elf_s390_hash_entry(h)->tls_type;
3022 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3023 goto emit_tls_relocs;
3024 }
3025
3026 if (htab->elf.sgot == NULL)
3027 abort ();
3028
3029 BFD_ASSERT (! unresolved_reloc);
3030 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3031 htab->elf.sgot->contents + off);
3032 relocation = htab->elf.sgot->output_offset + off;
3033 if (r_type == R_390_TLS_IEENT)
3034 relocation += htab->elf.sgot->output_section->vma;
3035 unresolved_reloc = FALSE;
3036 break;
3037
3038 case R_390_TLS_LDM64:
3039 if (! info->shared)
3040 /* The literal pool entry this relocation refers to gets ignored
3041 by the optimized code of the local exec model. Do nothing
3042 and the value will turn out zero. */
3043 continue;
3044
3045 if (htab->elf.sgot == NULL)
3046 abort ();
3047
3048 off = htab->tls_ldm_got.offset;
3049 if (off & 1)
3050 off &= ~1;
3051 else
3052 {
3053 Elf_Internal_Rela outrel;
3054 bfd_byte *loc;
3055
3056 if (htab->elf.srelgot == NULL)
3057 abort ();
3058
3059 outrel.r_offset = (htab->elf.sgot->output_section->vma
3060 + htab->elf.sgot->output_offset + off);
3061
3062 bfd_put_64 (output_bfd, 0,
3063 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3064 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3065 outrel.r_addend = 0;
3066 loc = htab->elf.srelgot->contents;
3067 loc += htab->elf.srelgot->reloc_count++
3068 * sizeof (Elf64_External_Rela);
3069 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3070 htab->tls_ldm_got.offset |= 1;
3071 }
3072 relocation = htab->elf.sgot->output_offset + off;
3073 unresolved_reloc = FALSE;
3074 break;
3075
3076 case R_390_TLS_LE64:
3077 if (info->shared)
3078 {
3079 /* Linking a shared library with non-fpic code requires
3080 a R_390_TLS_TPOFF relocation. */
3081 Elf_Internal_Rela outrel;
3082 asection *sreloc;
3083 bfd_byte *loc;
3084 int indx;
3085
3086 outrel.r_offset = rel->r_offset
3087 + input_section->output_section->vma
3088 + input_section->output_offset;
3089 if (h != NULL && h->dynindx != -1)
3090 indx = h->dynindx;
3091 else
3092 indx = 0;
3093 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3094 if (indx == 0)
3095 outrel.r_addend = relocation - dtpoff_base (info);
3096 else
3097 outrel.r_addend = 0;
3098 sreloc = elf_section_data (input_section)->sreloc;
3099 if (sreloc == NULL)
3100 abort ();
3101 loc = sreloc->contents;
3102 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3103 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3104 }
3105 else
3106 {
3107 BFD_ASSERT (! unresolved_reloc);
3108 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3109 contents + rel->r_offset);
3110 }
3111 continue;
3112
3113 case R_390_TLS_LDO64:
3114 if (info->shared || (input_section->flags & SEC_DEBUGGING))
3115 relocation -= dtpoff_base (info);
3116 else
3117 /* When converting LDO to LE, we must negate. */
3118 relocation = -tpoff (info, relocation);
3119 break;
3120
3121 /* Relocations for tls instructions. */
3122 case R_390_TLS_LOAD:
3123 case R_390_TLS_GDCALL:
3124 case R_390_TLS_LDCALL:
3125 tls_type = GOT_UNKNOWN;
3126 if (h == NULL && local_got_offsets)
3127 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3128 else if (h != NULL)
3129 tls_type = elf_s390_hash_entry(h)->tls_type;
3130
3131 if (tls_type == GOT_TLS_GD)
3132 continue;
3133
3134 if (r_type == R_390_TLS_LOAD)
3135 {
3136 if (!info->shared && (h == NULL || h->dynindx == -1))
3137 {
3138 /* IE->LE transition. Four valid cases:
3139 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3140 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3141 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3142 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3143 unsigned int insn0, insn1, ry;
3144
3145 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3146 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3147 if (insn1 != 0x0004)
3148 invalid_tls_insn (input_bfd, input_section, rel);
3149 ry = 0;
3150 if ((insn0 & 0xff00f000) == 0xe3000000)
3151 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3152 ry = (insn0 & 0x000f0000);
3153 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3154 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3155 ry = (insn0 & 0x0000f000) << 4;
3156 else if ((insn0 & 0xff00f000) == 0xe300c000)
3157 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3158 ry = (insn0 & 0x000f0000);
3159 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3160 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3161 ry = (insn0 & 0x0000f000) << 4;
3162 else
3163 invalid_tls_insn (input_bfd, input_section, rel);
3164 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3165 insn1 = 0x000d;
3166 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3167 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3168 }
3169 }
3170 else if (r_type == R_390_TLS_GDCALL)
3171 {
3172 unsigned int insn0, insn1;
3173
3174 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3175 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3176 if ((insn0 & 0xffff0000) != 0xc0e50000)
3177 invalid_tls_insn (input_bfd, input_section, rel);
3178 if (!info->shared && (h == NULL || h->dynindx == -1))
3179 {
3180 /* GD->LE transition.
3181 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3182 insn0 = 0xc0040000;
3183 insn1 = 0x0000;
3184 }
3185 else
3186 {
3187 /* GD->IE transition.
3188 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3189 insn0 = 0xe322c000;
3190 insn1 = 0x0004;
3191 }
3192 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3193 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3194 }
3195 else if (r_type == R_390_TLS_LDCALL)
3196 {
3197 if (!info->shared)
3198 {
3199 unsigned int insn0, insn1;
3200
3201 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3202 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3203 if ((insn0 & 0xffff0000) != 0xc0e50000)
3204 invalid_tls_insn (input_bfd, input_section, rel);
3205 /* LD->LE transition.
3206 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3207 insn0 = 0xc0040000;
3208 insn1 = 0x0000;
3209 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3210 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3211 }
3212 }
3213 continue;
3214
3215 default:
3216 break;
3217 }
3218
3219 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3220 because such sections are not SEC_ALLOC and thus ld.so will
3221 not process them. */
3222 if (unresolved_reloc
3223 && !((input_section->flags & SEC_DEBUGGING) != 0
3224 && h->def_dynamic)
3225 && _bfd_elf_section_offset (output_bfd, info, input_section,
3226 rel->r_offset) != (bfd_vma) -1)
3227 (*_bfd_error_handler)
3228 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3229 input_bfd,
3230 input_section,
3231 (long) rel->r_offset,
3232 howto->name,
3233 h->root.root.string);
3234
3235 do_relocation:
3236
3237 /* When applying a 24 bit reloc we need to start one byte
3238 earlier. Otherwise the 32 bit get/put bfd operations might
3239 access a byte after the actual section. */
3240 if (r_type == R_390_PC24DBL
3241 || r_type == R_390_PLT24DBL)
3242 rel->r_offset--;
3243
3244 if (r_type == R_390_20
3245 || r_type == R_390_GOT20
3246 || r_type == R_390_GOTPLT20
3247 || r_type == R_390_TLS_GOTIE20)
3248 {
3249 relocation += rel->r_addend;
3250 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3251 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3252 contents, rel->r_offset,
3253 relocation, 0);
3254 }
3255 else
3256 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3257 contents, rel->r_offset,
3258 relocation, rel->r_addend);
3259
3260 if (r != bfd_reloc_ok)
3261 {
3262 const char *name;
3263
3264 if (h != NULL)
3265 name = h->root.root.string;
3266 else
3267 {
3268 name = bfd_elf_string_from_elf_section (input_bfd,
3269 symtab_hdr->sh_link,
3270 sym->st_name);
3271 if (name == NULL)
3272 return FALSE;
3273 if (*name == '\0')
3274 name = bfd_section_name (input_bfd, sec);
3275 }
3276
3277 if (r == bfd_reloc_overflow)
3278 {
3279
3280 if (! ((*info->callbacks->reloc_overflow)
3281 (info, (h ? &h->root : NULL), name, howto->name,
3282 (bfd_vma) 0, input_bfd, input_section,
3283 rel->r_offset)))
3284 return FALSE;
3285 }
3286 else
3287 {
3288 (*_bfd_error_handler)
3289 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3290 input_bfd, input_section,
3291 (long) rel->r_offset, name, (int) r);
3292 return FALSE;
3293 }
3294 }
3295 }
3296
3297 return TRUE;
3298 }
3299
3300 /* Generate the PLT slots together with the dynamic relocations needed
3301 for IFUNC symbols. */
3302
3303 static void
3304 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3305 struct bfd_link_info *info,
3306 struct elf_link_hash_entry *h,
3307 struct elf_s390_link_hash_table *htab,
3308 bfd_vma plt_offset,
3309 bfd_vma resolver_address)
3310 {
3311 bfd_vma plt_index;
3312 bfd_vma got_offset;
3313 Elf_Internal_Rela rela;
3314 bfd_byte *loc;
3315 asection *plt, *gotplt, *relplt;
3316
3317 if (htab->elf.iplt == NULL
3318 || htab->elf.igotplt == NULL
3319 || htab->elf.irelplt == NULL)
3320 abort ();
3321
3322 /* Index of the PLT slot within iplt section. */
3323 plt_index = plt_offset / PLT_ENTRY_SIZE;
3324 plt = htab->elf.iplt;
3325 /* Offset into the igot.plt section. */
3326 got_offset = plt_index * GOT_ENTRY_SIZE;
3327 gotplt = htab->elf.igotplt;
3328 relplt = htab->elf.irelplt;
3329
3330 /* Fill in the blueprint of a PLT. */
3331 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3332 PLT_ENTRY_SIZE);
3333
3334 /* Fixup the relative address to the GOT entry */
3335 bfd_put_32 (output_bfd,
3336 (gotplt->output_section->vma +
3337 gotplt->output_offset + got_offset
3338 - (plt->output_section->vma +
3339 plt->output_offset +
3340 plt_offset))/2,
3341 plt->contents + plt_offset + 2);
3342 /* Fixup the relative branch to PLT 0 */
3343 bfd_put_32 (output_bfd, - (plt->output_offset +
3344 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3345 plt->contents + plt_offset + 24);
3346 /* Fixup offset into .rela.plt section. */
3347 bfd_put_32 (output_bfd, relplt->output_offset +
3348 plt_index * sizeof (Elf64_External_Rela),
3349 plt->contents + plt_offset + 28);
3350
3351 /* Fill in the entry in the global offset table.
3352 Points to instruction after GOT offset. */
3353 bfd_put_64 (output_bfd,
3354 (plt->output_section->vma
3355 + plt->output_offset
3356 + plt_offset
3357 + 14),
3358 gotplt->contents + got_offset);
3359
3360 /* Fill in the entry in the .rela.plt section. */
3361 rela.r_offset = (gotplt->output_section->vma
3362 + gotplt->output_offset
3363 + got_offset);
3364
3365 if (!h
3366 || h->dynindx == -1
3367 || ((info->executable
3368 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3369 && h->def_regular))
3370 {
3371 /* The symbol can be locally resolved. */
3372 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3373 rela.r_addend = resolver_address;
3374 }
3375 else
3376 {
3377 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3378 rela.r_addend = 0;
3379 }
3380
3381 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3382 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3383 }
3384
3385
3386 /* Finish up dynamic symbol handling. We set the contents of various
3387 dynamic sections here. */
3388
3389 static bfd_boolean
3390 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3391 struct bfd_link_info *info,
3392 struct elf_link_hash_entry *h,
3393 Elf_Internal_Sym *sym)
3394 {
3395 struct elf_s390_link_hash_table *htab;
3396 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3397
3398 htab = elf_s390_hash_table (info);
3399 if (htab == NULL)
3400 return FALSE;
3401
3402 if (h->plt.offset != (bfd_vma) -1)
3403 {
3404 bfd_vma plt_index;
3405 bfd_vma got_offset;
3406 Elf_Internal_Rela rela;
3407 bfd_byte *loc;
3408
3409 /* This symbol has an entry in the procedure linkage table. Set
3410 it up. */
3411 if (s390_is_ifunc_symbol_p (h))
3412 {
3413 /* If we can resolve the IFUNC symbol locally we generate an
3414 IRELATIVE reloc. */
3415 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3416 eh->ifunc_resolver_address +
3417 eh->ifunc_resolver_section->output_offset +
3418 eh->ifunc_resolver_section->output_section->vma);
3419 ;
3420 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3421 symbols is below. */
3422 }
3423 else
3424 {
3425 if (h->dynindx == -1
3426 || htab->elf.splt == NULL
3427 || htab->elf.sgotplt == NULL
3428 || htab->elf.srelplt == NULL)
3429 abort ();
3430
3431 /* Calc. index no.
3432 Current offset - size first entry / entry size. */
3433 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3434
3435 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3436 addr & GOT addr. */
3437 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3438
3439 /* Fill in the blueprint of a PLT. */
3440 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3441 PLT_ENTRY_SIZE);
3442
3443 /* Fixup the relative address to the GOT entry */
3444 bfd_put_32 (output_bfd,
3445 (htab->elf.sgotplt->output_section->vma +
3446 htab->elf.sgotplt->output_offset + got_offset
3447 - (htab->elf.splt->output_section->vma +
3448 htab->elf.splt->output_offset +
3449 h->plt.offset))/2,
3450 htab->elf.splt->contents + h->plt.offset + 2);
3451 /* Fixup the relative branch to PLT 0 */
3452 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3453 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3454 htab->elf.splt->contents + h->plt.offset + 24);
3455 /* Fixup offset into .rela.plt section. */
3456 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3457 htab->elf.splt->contents + h->plt.offset + 28);
3458
3459 /* Fill in the entry in the global offset table.
3460 Points to instruction after GOT offset. */
3461 bfd_put_64 (output_bfd,
3462 (htab->elf.splt->output_section->vma
3463 + htab->elf.splt->output_offset
3464 + h->plt.offset
3465 + 14),
3466 htab->elf.sgotplt->contents + got_offset);
3467
3468 /* Fill in the entry in the .rela.plt section. */
3469 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3470 + htab->elf.sgotplt->output_offset
3471 + got_offset);
3472 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3473 rela.r_addend = 0;
3474 loc = htab->elf.srelplt->contents + plt_index *
3475 sizeof (Elf64_External_Rela);
3476 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3477
3478 if (!h->def_regular)
3479 {
3480 /* Mark the symbol as undefined, rather than as defined in
3481 the .plt section. Leave the value alone. This is a clue
3482 for the dynamic linker, to make function pointer
3483 comparisons work between an application and shared
3484 library. */
3485 sym->st_shndx = SHN_UNDEF;
3486 }
3487 }
3488 }
3489
3490 if (h->got.offset != (bfd_vma) -1
3491 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3492 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3493 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3494 {
3495 Elf_Internal_Rela rela;
3496 bfd_byte *loc;
3497
3498 /* This symbol has an entry in the global offset table. Set it
3499 up. */
3500 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3501 abort ();
3502
3503 rela.r_offset = (htab->elf.sgot->output_section->vma
3504 + htab->elf.sgot->output_offset
3505 + (h->got.offset &~ (bfd_vma) 1));
3506
3507 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3508 {
3509 if (info->shared)
3510 {
3511 /* An explicit GOT slot usage needs GLOB_DAT. If the
3512 symbol references local the implicit got.iplt slot
3513 will be used and the IRELATIVE reloc has been created
3514 above. */
3515 goto do_glob_dat;
3516 }
3517 else
3518 {
3519 /* For non-shared objects explicit GOT slots must be
3520 filled with the PLT slot address for pointer
3521 equality reasons. */
3522 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3523 + htab->elf.iplt->output_offset
3524 + h->plt.offset),
3525 htab->elf.sgot->contents + h->got.offset);
3526 return TRUE;
3527 }
3528 }
3529 else if (info->shared
3530 && SYMBOL_REFERENCES_LOCAL (info, h))
3531 {
3532 /* If this is a static link, or it is a -Bsymbolic link and
3533 the symbol is defined locally or was forced to be local
3534 because of a version file, we just want to emit a
3535 RELATIVE reloc. The entry in the global offset table
3536 will already have been initialized in the
3537 relocate_section function. */
3538 if (!h->def_regular)
3539 return FALSE;
3540 BFD_ASSERT((h->got.offset & 1) != 0);
3541 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3542 rela.r_addend = (h->root.u.def.value
3543 + h->root.u.def.section->output_section->vma
3544 + h->root.u.def.section->output_offset);
3545 }
3546 else
3547 {
3548 BFD_ASSERT((h->got.offset & 1) == 0);
3549 do_glob_dat:
3550 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3551 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3552 rela.r_addend = 0;
3553 }
3554
3555 loc = htab->elf.srelgot->contents;
3556 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3557 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3558 }
3559
3560 if (h->needs_copy)
3561 {
3562 Elf_Internal_Rela rela;
3563 bfd_byte *loc;
3564
3565 /* This symbols needs a copy reloc. Set it up. */
3566
3567 if (h->dynindx == -1
3568 || (h->root.type != bfd_link_hash_defined
3569 && h->root.type != bfd_link_hash_defweak)
3570 || htab->srelbss == NULL)
3571 abort ();
3572
3573 rela.r_offset = (h->root.u.def.value
3574 + h->root.u.def.section->output_section->vma
3575 + h->root.u.def.section->output_offset);
3576 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3577 rela.r_addend = 0;
3578 loc = htab->srelbss->contents;
3579 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3580 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3581 }
3582
3583 /* Mark some specially defined symbols as absolute. */
3584 if (h == htab->elf.hdynamic
3585 || h == htab->elf.hgot
3586 || h == htab->elf.hplt)
3587 sym->st_shndx = SHN_ABS;
3588
3589 return TRUE;
3590 }
3591
3592 /* Used to decide how to sort relocs in an optimal manner for the
3593 dynamic linker, before writing them out. */
3594
3595 static enum elf_reloc_type_class
3596 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3597 const asection *rel_sec ATTRIBUTE_UNUSED,
3598 const Elf_Internal_Rela *rela)
3599 {
3600 switch ((int) ELF64_R_TYPE (rela->r_info))
3601 {
3602 case R_390_RELATIVE:
3603 return reloc_class_relative;
3604 case R_390_JMP_SLOT:
3605 return reloc_class_plt;
3606 case R_390_COPY:
3607 return reloc_class_copy;
3608 default:
3609 return reloc_class_normal;
3610 }
3611 }
3612
3613 /* Finish up the dynamic sections. */
3614
3615 static bfd_boolean
3616 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3617 struct bfd_link_info *info)
3618 {
3619 struct elf_s390_link_hash_table *htab;
3620 bfd *dynobj;
3621 asection *sdyn;
3622 bfd *ibfd;
3623 unsigned int i;
3624
3625 htab = elf_s390_hash_table (info);
3626 if (htab == NULL)
3627 return FALSE;
3628
3629 dynobj = htab->elf.dynobj;
3630 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3631
3632 if (htab->elf.dynamic_sections_created)
3633 {
3634 Elf64_External_Dyn *dyncon, *dynconend;
3635
3636 if (sdyn == NULL || htab->elf.sgot == NULL)
3637 abort ();
3638
3639 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3640 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3641 for (; dyncon < dynconend; dyncon++)
3642 {
3643 Elf_Internal_Dyn dyn;
3644 asection *s;
3645
3646 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3647
3648 switch (dyn.d_tag)
3649 {
3650 default:
3651 continue;
3652
3653 case DT_PLTGOT:
3654 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3655 break;
3656
3657 case DT_JMPREL:
3658 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3659 break;
3660
3661 case DT_PLTRELSZ:
3662 s = htab->elf.srelplt->output_section;
3663 dyn.d_un.d_val = s->size;
3664 break;
3665
3666 case DT_RELASZ:
3667 /* The procedure linkage table relocs (DT_JMPREL) should
3668 not be included in the overall relocs (DT_RELA).
3669 Therefore, we override the DT_RELASZ entry here to
3670 make it not include the JMPREL relocs. Since the
3671 linker script arranges for .rela.plt to follow all
3672 other relocation sections, we don't have to worry
3673 about changing the DT_RELA entry. */
3674 s = htab->elf.srelplt->output_section;
3675 dyn.d_un.d_val -= s->size;
3676 break;
3677 }
3678
3679 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3680 }
3681
3682 /* Fill in the special first entry in the procedure linkage table. */
3683 if (htab->elf.splt && htab->elf.splt->size > 0)
3684 {
3685 /* fill in blueprint for plt 0 entry */
3686 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3687 PLT_FIRST_ENTRY_SIZE);
3688 /* Fixup relative address to start of GOT */
3689 bfd_put_32 (output_bfd,
3690 (htab->elf.sgotplt->output_section->vma +
3691 htab->elf.sgotplt->output_offset
3692 - htab->elf.splt->output_section->vma - 6)/2,
3693 htab->elf.splt->contents + 8);
3694 }
3695 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3696 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3697 = PLT_ENTRY_SIZE;
3698 }
3699
3700 if (htab->elf.sgotplt)
3701 {
3702 /* Fill in the first three entries in the global offset table. */
3703 if (htab->elf.sgotplt->size > 0)
3704 {
3705 bfd_put_64 (output_bfd,
3706 (sdyn == NULL ? (bfd_vma) 0
3707 : sdyn->output_section->vma + sdyn->output_offset),
3708 htab->elf.sgotplt->contents);
3709 /* One entry for shared object struct ptr. */
3710 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3711 /* One entry for _dl_runtime_resolve. */
3712 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
3713 }
3714
3715 elf_section_data (htab->elf.sgot->output_section)
3716 ->this_hdr.sh_entsize = 8;
3717 }
3718
3719 /* Finish dynamic symbol for local IFUNC symbols. */
3720 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3721 {
3722 struct plt_entry *local_plt;
3723 Elf_Internal_Sym *isym;
3724 Elf_Internal_Shdr *symtab_hdr;
3725
3726 symtab_hdr = &elf_symtab_hdr (ibfd);
3727
3728 local_plt = elf_s390_local_plt (ibfd);
3729 if (local_plt != NULL)
3730 for (i = 0; i < symtab_hdr->sh_info; i++)
3731 {
3732 if (local_plt[i].plt.offset != (bfd_vma) -1)
3733 {
3734 asection *sec = local_plt[i].sec;
3735 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3736 if (isym == NULL)
3737 return FALSE;
3738
3739 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3740 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3741 local_plt[i].plt.offset,
3742 isym->st_value
3743 + sec->output_section->vma
3744 + sec->output_offset);
3745
3746 }
3747 }
3748 }
3749
3750 return TRUE;
3751 }
3752
3753 /* Return address for Ith PLT stub in section PLT, for relocation REL
3754 or (bfd_vma) -1 if it should not be included. */
3755
3756 static bfd_vma
3757 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3758 const arelent *rel ATTRIBUTE_UNUSED)
3759 {
3760 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3761 }
3762
3763 /* Why was the hash table entry size definition changed from
3764 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3765 this is the only reason for the s390_elf64_size_info structure. */
3766
3767 const struct elf_size_info s390_elf64_size_info =
3768 {
3769 sizeof (Elf64_External_Ehdr),
3770 sizeof (Elf64_External_Phdr),
3771 sizeof (Elf64_External_Shdr),
3772 sizeof (Elf64_External_Rel),
3773 sizeof (Elf64_External_Rela),
3774 sizeof (Elf64_External_Sym),
3775 sizeof (Elf64_External_Dyn),
3776 sizeof (Elf_External_Note),
3777 8, /* hash-table entry size. */
3778 1, /* internal relocations per external relocations. */
3779 64, /* arch_size. */
3780 3, /* log_file_align. */
3781 ELFCLASS64, EV_CURRENT,
3782 bfd_elf64_write_out_phdrs,
3783 bfd_elf64_write_shdrs_and_ehdr,
3784 bfd_elf64_checksum_contents,
3785 bfd_elf64_write_relocs,
3786 bfd_elf64_swap_symbol_in,
3787 bfd_elf64_swap_symbol_out,
3788 bfd_elf64_slurp_reloc_table,
3789 bfd_elf64_slurp_symbol_table,
3790 bfd_elf64_swap_dyn_in,
3791 bfd_elf64_swap_dyn_out,
3792 bfd_elf64_swap_reloc_in,
3793 bfd_elf64_swap_reloc_out,
3794 bfd_elf64_swap_reloca_in,
3795 bfd_elf64_swap_reloca_out
3796 };
3797
3798 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3799 #define TARGET_BIG_NAME "elf64-s390"
3800 #define ELF_ARCH bfd_arch_s390
3801 #define ELF_TARGET_ID S390_ELF_DATA
3802 #define ELF_MACHINE_CODE EM_S390
3803 #define ELF_MACHINE_ALT1 EM_S390_OLD
3804 #define ELF_MAXPAGESIZE 0x1000
3805
3806 #define elf_backend_size_info s390_elf64_size_info
3807
3808 #define elf_backend_can_gc_sections 1
3809 #define elf_backend_can_refcount 1
3810 #define elf_backend_want_got_plt 1
3811 #define elf_backend_plt_readonly 1
3812 #define elf_backend_want_plt_sym 0
3813 #define elf_backend_got_header_size 24
3814 #define elf_backend_rela_normal 1
3815
3816 #define elf_info_to_howto elf_s390_info_to_howto
3817
3818 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3819 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3820 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3821 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3822
3823 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3824 #define elf_backend_check_relocs elf_s390_check_relocs
3825 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3826 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3827 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3828 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3829 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3830 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3831 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3832 #define elf_backend_relocate_section elf_s390_relocate_section
3833 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3834 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3835 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3836 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3837
3838 #define bfd_elf64_mkobject elf_s390_mkobject
3839 #define elf_backend_object_p elf_s390_object_p
3840
3841 /* Enable ELF64 archive functions. */
3842 #define bfd_elf64_archive_functions
3843 extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
3844 extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
3845
3846 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3847 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3848 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3849 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3850 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3851 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3852 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3853 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3854 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3855
3856 #include "elf64-target.h"
A mirror of the official binutils-gdb repository