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PR19083 S/390: Fix garbage collection of some GOT relocs.
[thirdparty/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2015 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 3, /* 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 (!bfd_link_pic (info))
779 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
780
781 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
782 || (!bfd_link_pic (info) && !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 (bfd_link_pic (info))
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 (bfd_link_relocatable (info))
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 (bfd_link_pic (info))
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 /* For static linking and executables this reloc will be
1187 calculated at linktime otherwise a TLS_TPOFF runtime
1188 reloc will be generated. */
1189 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1190 break;
1191
1192 if (!bfd_link_pic (info))
1193 break;
1194 info->flags |= DF_STATIC_TLS;
1195 /* Fall through */
1196
1197 case R_390_8:
1198 case R_390_16:
1199 case R_390_32:
1200 case R_390_64:
1201 case R_390_PC12DBL:
1202 case R_390_PC16:
1203 case R_390_PC16DBL:
1204 case R_390_PC24DBL:
1205 case R_390_PC32:
1206 case R_390_PC32DBL:
1207 case R_390_PC64:
1208 if (h != NULL)
1209 {
1210 /* If this reloc is in a read-only section, we might
1211 need a copy reloc. We can't check reliably at this
1212 stage whether the section is read-only, as input
1213 sections have not yet been mapped to output sections.
1214 Tentatively set the flag for now, and correct in
1215 adjust_dynamic_symbol. */
1216 h->non_got_ref = 1;
1217
1218 if (!bfd_link_pic (info))
1219 {
1220 /* We may need a .plt entry if the function this reloc
1221 refers to is in a shared lib. */
1222 h->plt.refcount += 1;
1223 }
1224 }
1225
1226 /* If we are creating a shared library, and this is a reloc
1227 against a global symbol, or a non PC relative reloc
1228 against a local symbol, then we need to copy the reloc
1229 into the shared library. However, if we are linking with
1230 -Bsymbolic, we do not need to copy a reloc against a
1231 global symbol which is defined in an object we are
1232 including in the link (i.e., DEF_REGULAR is set). At
1233 this point we have not seen all the input files, so it is
1234 possible that DEF_REGULAR is not set now but will be set
1235 later (it is never cleared). In case of a weak definition,
1236 DEF_REGULAR may be cleared later by a strong definition in
1237 a shared library. We account for that possibility below by
1238 storing information in the relocs_copied field of the hash
1239 table entry. A similar situation occurs when creating
1240 shared libraries and symbol visibility changes render the
1241 symbol local.
1242
1243 If on the other hand, we are creating an executable, we
1244 may need to keep relocations for symbols satisfied by a
1245 dynamic library if we manage to avoid copy relocs for the
1246 symbol. */
1247 if ((bfd_link_pic (info)
1248 && (sec->flags & SEC_ALLOC) != 0
1249 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1250 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1251 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1252 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1253 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1254 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1255 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1256 || (h != NULL
1257 && (! SYMBOLIC_BIND (info, h)
1258 || h->root.type == bfd_link_hash_defweak
1259 || !h->def_regular))))
1260 || (ELIMINATE_COPY_RELOCS
1261 && !bfd_link_pic (info)
1262 && (sec->flags & SEC_ALLOC) != 0
1263 && h != NULL
1264 && (h->root.type == bfd_link_hash_defweak
1265 || !h->def_regular)))
1266 {
1267 struct elf_dyn_relocs *p;
1268 struct elf_dyn_relocs **head;
1269
1270 /* We must copy these reloc types into the output file.
1271 Create a reloc section in dynobj and make room for
1272 this reloc. */
1273 if (sreloc == NULL)
1274 {
1275 if (htab->elf.dynobj == NULL)
1276 htab->elf.dynobj = abfd;
1277
1278 sreloc = _bfd_elf_make_dynamic_reloc_section
1279 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1280
1281 if (sreloc == NULL)
1282 return FALSE;
1283 }
1284
1285 /* If this is a global symbol, we count the number of
1286 relocations we need for this symbol. */
1287 if (h != NULL)
1288 {
1289 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1290 }
1291 else
1292 {
1293 /* Track dynamic relocs needed for local syms too.
1294 We really need local syms available to do this
1295 easily. Oh well. */
1296 asection *s;
1297 void *vpp;
1298
1299 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1300 abfd, r_symndx);
1301 if (isym == NULL)
1302 return FALSE;
1303
1304 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1305 if (s == NULL)
1306 s = sec;
1307
1308 vpp = &elf_section_data (s)->local_dynrel;
1309 head = (struct elf_dyn_relocs **) vpp;
1310 }
1311
1312 p = *head;
1313 if (p == NULL || p->sec != sec)
1314 {
1315 bfd_size_type amt = sizeof *p;
1316 p = ((struct elf_dyn_relocs *)
1317 bfd_alloc (htab->elf.dynobj, amt));
1318 if (p == NULL)
1319 return FALSE;
1320 p->next = *head;
1321 *head = p;
1322 p->sec = sec;
1323 p->count = 0;
1324 p->pc_count = 0;
1325 }
1326
1327 p->count += 1;
1328 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1329 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1330 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1331 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1332 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1333 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1334 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1335 p->pc_count += 1;
1336 }
1337 break;
1338
1339 /* This relocation describes the C++ object vtable hierarchy.
1340 Reconstruct it for later use during GC. */
1341 case R_390_GNU_VTINHERIT:
1342 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1343 return FALSE;
1344 break;
1345
1346 /* This relocation describes which C++ vtable entries are actually
1347 used. Record for later use during GC. */
1348 case R_390_GNU_VTENTRY:
1349 BFD_ASSERT (h != NULL);
1350 if (h != NULL
1351 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1352 return FALSE;
1353 break;
1354
1355 default:
1356 break;
1357 }
1358 }
1359
1360 return TRUE;
1361 }
1362
1363 /* Return the section that should be marked against GC for a given
1364 relocation. */
1365
1366 static asection *
1367 elf_s390_gc_mark_hook (asection *sec,
1368 struct bfd_link_info *info,
1369 Elf_Internal_Rela *rel,
1370 struct elf_link_hash_entry *h,
1371 Elf_Internal_Sym *sym)
1372 {
1373 if (h != NULL)
1374 switch (ELF64_R_TYPE (rel->r_info))
1375 {
1376 case R_390_GNU_VTINHERIT:
1377 case R_390_GNU_VTENTRY:
1378 return NULL;
1379 }
1380
1381 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1382 }
1383
1384 /* Update the got entry reference counts for the section being removed. */
1385
1386 static bfd_boolean
1387 elf_s390_gc_sweep_hook (bfd *abfd,
1388 struct bfd_link_info *info,
1389 asection *sec,
1390 const Elf_Internal_Rela *relocs)
1391 {
1392 struct elf_s390_link_hash_table *htab;
1393 Elf_Internal_Shdr *symtab_hdr;
1394 struct elf_link_hash_entry **sym_hashes;
1395 bfd_signed_vma *local_got_refcounts;
1396 const Elf_Internal_Rela *rel, *relend;
1397
1398 if (bfd_link_relocatable (info))
1399 return TRUE;
1400
1401 htab = elf_s390_hash_table (info);
1402 if (htab == NULL)
1403 return FALSE;
1404
1405 elf_section_data (sec)->local_dynrel = NULL;
1406
1407 symtab_hdr = &elf_symtab_hdr (abfd);
1408 sym_hashes = elf_sym_hashes (abfd);
1409 local_got_refcounts = elf_local_got_refcounts (abfd);
1410
1411 relend = relocs + sec->reloc_count;
1412 for (rel = relocs; rel < relend; rel++)
1413 {
1414 unsigned long r_symndx;
1415 unsigned int r_type;
1416 struct elf_link_hash_entry *h = NULL;
1417
1418 r_symndx = ELF64_R_SYM (rel->r_info);
1419 if (r_symndx >= symtab_hdr->sh_info)
1420 {
1421 struct elf_s390_link_hash_entry *eh;
1422 struct elf_dyn_relocs **pp;
1423 struct elf_dyn_relocs *p;
1424
1425 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1426 while (h->root.type == bfd_link_hash_indirect
1427 || h->root.type == bfd_link_hash_warning)
1428 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1429 eh = (struct elf_s390_link_hash_entry *) h;
1430
1431 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1432 if (p->sec == sec)
1433 {
1434 /* Everything must go for SEC. */
1435 *pp = p->next;
1436 break;
1437 }
1438 }
1439 else
1440 {
1441 Elf_Internal_Sym *isym;
1442
1443 /* A local symbol. */
1444 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1445 abfd, r_symndx);
1446 if (isym == NULL)
1447 return FALSE;
1448
1449 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1450 {
1451 struct plt_entry *plt = elf_s390_local_plt (abfd);
1452 if (plt[r_symndx].plt.refcount > 0)
1453 plt[r_symndx].plt.refcount--;
1454 }
1455 }
1456
1457 r_type = ELF64_R_TYPE (rel->r_info);
1458 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1459 switch (r_type)
1460 {
1461 case R_390_TLS_LDM64:
1462 if (htab->tls_ldm_got.refcount > 0)
1463 htab->tls_ldm_got.refcount -= 1;
1464 break;
1465 case R_390_GOTOFF16:
1466 case R_390_GOTOFF32:
1467 case R_390_GOTOFF64:
1468 case R_390_GOTPC:
1469 case R_390_GOTPCDBL:
1470 break;
1471
1472 case R_390_TLS_GD64:
1473 case R_390_TLS_IE64:
1474 case R_390_TLS_GOTIE12:
1475 case R_390_TLS_GOTIE20:
1476 case R_390_TLS_GOTIE64:
1477 case R_390_TLS_IEENT:
1478 case R_390_GOT12:
1479 case R_390_GOT16:
1480 case R_390_GOT20:
1481 case R_390_GOT32:
1482 case R_390_GOT64:
1483 case R_390_GOTENT:
1484 if (h != NULL)
1485 {
1486 if (h->got.refcount > 0)
1487 h->got.refcount -= 1;
1488 }
1489 else if (local_got_refcounts != NULL)
1490 {
1491 if (local_got_refcounts[r_symndx] > 0)
1492 local_got_refcounts[r_symndx] -= 1;
1493 }
1494 break;
1495
1496 case R_390_8:
1497 case R_390_12:
1498 case R_390_16:
1499 case R_390_20:
1500 case R_390_32:
1501 case R_390_64:
1502 case R_390_PC16:
1503 case R_390_PC12DBL:
1504 case R_390_PC16DBL:
1505 case R_390_PC24DBL:
1506 case R_390_PC32:
1507 case R_390_PC32DBL:
1508 case R_390_PC64:
1509 if (bfd_link_pic (info))
1510 break;
1511 /* Fall through */
1512
1513 case R_390_PLT12DBL:
1514 case R_390_PLT16DBL:
1515 case R_390_PLT24DBL:
1516 case R_390_PLT32:
1517 case R_390_PLT32DBL:
1518 case R_390_PLT64:
1519 case R_390_PLTOFF16:
1520 case R_390_PLTOFF32:
1521 case R_390_PLTOFF64:
1522 if (h != NULL)
1523 {
1524 if (h->plt.refcount > 0)
1525 h->plt.refcount -= 1;
1526 }
1527 break;
1528
1529 case R_390_GOTPLT12:
1530 case R_390_GOTPLT16:
1531 case R_390_GOTPLT20:
1532 case R_390_GOTPLT32:
1533 case R_390_GOTPLT64:
1534 case R_390_GOTPLTENT:
1535 if (h != NULL)
1536 {
1537 if (h->plt.refcount > 0)
1538 {
1539 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1540 h->plt.refcount -= 1;
1541 }
1542 }
1543 else if (local_got_refcounts != NULL)
1544 {
1545 if (local_got_refcounts[r_symndx] > 0)
1546 local_got_refcounts[r_symndx] -= 1;
1547 }
1548 break;
1549
1550 default:
1551 break;
1552 }
1553 }
1554
1555 return TRUE;
1556 }
1557
1558 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1559 entry but we found we will not create any. Called when we find we will
1560 not have any PLT for this symbol, by for example
1561 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1562 or elf_s390_size_dynamic_sections if no dynamic sections will be
1563 created (we're only linking static objects). */
1564
1565 static void
1566 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1567 {
1568 if (h->elf.root.type == bfd_link_hash_warning)
1569 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1570
1571 if (h->gotplt_refcount <= 0)
1572 return;
1573
1574 /* We simply add the number of gotplt references to the number
1575 * of got references for this symbol. */
1576 h->elf.got.refcount += h->gotplt_refcount;
1577 h->gotplt_refcount = -1;
1578 }
1579
1580 /* Adjust a symbol defined by a dynamic object and referenced by a
1581 regular object. The current definition is in some section of the
1582 dynamic object, but we're not including those sections. We have to
1583 change the definition to something the rest of the link can
1584 understand. */
1585
1586 static bfd_boolean
1587 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1588 struct elf_link_hash_entry *h)
1589 {
1590 struct elf_s390_link_hash_table *htab;
1591 asection *s;
1592
1593 /* STT_GNU_IFUNC symbol must go through PLT. */
1594 if (s390_is_ifunc_symbol_p (h))
1595 return TRUE;
1596
1597 /* If this is a function, put it in the procedure linkage table. We
1598 will fill in the contents of the procedure linkage table later
1599 (although we could actually do it here). */
1600 if (h->type == STT_FUNC
1601 || h->needs_plt)
1602 {
1603 if (h->plt.refcount <= 0
1604 || SYMBOL_CALLS_LOCAL (info, h)
1605 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1606 && h->root.type == bfd_link_hash_undefweak))
1607 {
1608 /* This case can occur if we saw a PLT32 reloc in an input
1609 file, but the symbol was never referred to by a dynamic
1610 object, or if all references were garbage collected. In
1611 such a case, we don't actually need to build a procedure
1612 linkage table, and we can just do a PC32 reloc instead. */
1613 h->plt.offset = (bfd_vma) -1;
1614 h->needs_plt = 0;
1615 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1616 }
1617
1618 return TRUE;
1619 }
1620 else
1621 /* It's possible that we incorrectly decided a .plt reloc was
1622 needed for an R_390_PC32 reloc to a non-function sym in
1623 check_relocs. We can't decide accurately between function and
1624 non-function syms in check-relocs; Objects loaded later in
1625 the link may change h->type. So fix it now. */
1626 h->plt.offset = (bfd_vma) -1;
1627
1628 /* If this is a weak symbol, and there is a real definition, the
1629 processor independent code will have arranged for us to see the
1630 real definition first, and we can just use the same value. */
1631 if (h->u.weakdef != NULL)
1632 {
1633 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1634 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1635 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1636 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1637 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1638 h->non_got_ref = h->u.weakdef->non_got_ref;
1639 return TRUE;
1640 }
1641
1642 /* This is a reference to a symbol defined by a dynamic object which
1643 is not a function. */
1644
1645 /* If we are creating a shared library, we must presume that the
1646 only references to the symbol are via the global offset table.
1647 For such cases we need not do anything here; the relocations will
1648 be handled correctly by relocate_section. */
1649 if (bfd_link_pic (info))
1650 return TRUE;
1651
1652 /* If there are no references to this symbol that do not use the
1653 GOT, we don't need to generate a copy reloc. */
1654 if (!h->non_got_ref)
1655 return TRUE;
1656
1657 /* If -z nocopyreloc was given, we won't generate them either. */
1658 if (info->nocopyreloc)
1659 {
1660 h->non_got_ref = 0;
1661 return TRUE;
1662 }
1663
1664 if (ELIMINATE_COPY_RELOCS)
1665 {
1666 struct elf_s390_link_hash_entry * eh;
1667 struct elf_dyn_relocs *p;
1668
1669 eh = (struct elf_s390_link_hash_entry *) h;
1670 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1671 {
1672 s = p->sec->output_section;
1673 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1674 break;
1675 }
1676
1677 /* If we didn't find any dynamic relocs in read-only sections, then
1678 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1679 if (p == NULL)
1680 {
1681 h->non_got_ref = 0;
1682 return TRUE;
1683 }
1684 }
1685
1686 /* We must allocate the symbol in our .dynbss section, which will
1687 become part of the .bss section of the executable. There will be
1688 an entry for this symbol in the .dynsym section. The dynamic
1689 object will contain position independent code, so all references
1690 from the dynamic object to this symbol will go through the global
1691 offset table. The dynamic linker will use the .dynsym entry to
1692 determine the address it must put in the global offset table, so
1693 both the dynamic object and the regular object will refer to the
1694 same memory location for the variable. */
1695
1696 htab = elf_s390_hash_table (info);
1697 if (htab == NULL)
1698 return FALSE;
1699
1700 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1701 copy the initial value out of the dynamic object and into the
1702 runtime process image. */
1703 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1704 {
1705 htab->srelbss->size += sizeof (Elf64_External_Rela);
1706 h->needs_copy = 1;
1707 }
1708
1709 s = htab->sdynbss;
1710
1711 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1712 }
1713
1714 /* Allocate space in .plt, .got and associated reloc sections for
1715 dynamic relocs. */
1716
1717 static bfd_boolean
1718 allocate_dynrelocs (struct elf_link_hash_entry *h,
1719 void * inf)
1720 {
1721 struct bfd_link_info *info;
1722 struct elf_s390_link_hash_table *htab;
1723 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1724 struct elf_dyn_relocs *p;
1725
1726 if (h->root.type == bfd_link_hash_indirect)
1727 return TRUE;
1728
1729 info = (struct bfd_link_info *) inf;
1730 htab = elf_s390_hash_table (info);
1731 if (htab == NULL)
1732 return FALSE;
1733
1734 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1735 here if it is defined and referenced in a non-shared object. */
1736 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1737 return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1738 &eh->dyn_relocs);
1739 else if (htab->elf.dynamic_sections_created
1740 && h->plt.refcount > 0)
1741 {
1742 /* Make sure this symbol is output as a dynamic symbol.
1743 Undefined weak syms won't yet be marked as dynamic. */
1744 if (h->dynindx == -1
1745 && !h->forced_local)
1746 {
1747 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1748 return FALSE;
1749 }
1750
1751 if (bfd_link_pic (info)
1752 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1753 {
1754 asection *s = htab->elf.splt;
1755
1756 /* If this is the first .plt entry, make room for the special
1757 first entry. */
1758 if (s->size == 0)
1759 s->size += PLT_FIRST_ENTRY_SIZE;
1760
1761 h->plt.offset = s->size;
1762
1763 /* If this symbol is not defined in a regular file, and we are
1764 not generating a shared library, then set the symbol to this
1765 location in the .plt. This is required to make function
1766 pointers compare as equal between the normal executable and
1767 the shared library. */
1768 if (! bfd_link_pic (info)
1769 && !h->def_regular)
1770 {
1771 h->root.u.def.section = s;
1772 h->root.u.def.value = h->plt.offset;
1773 }
1774
1775 /* Make room for this entry. */
1776 s->size += PLT_ENTRY_SIZE;
1777
1778 /* We also need to make an entry in the .got.plt section, which
1779 will be placed in the .got section by the linker script. */
1780 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1781
1782 /* We also need to make an entry in the .rela.plt section. */
1783 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1784 }
1785 else
1786 {
1787 h->plt.offset = (bfd_vma) -1;
1788 h->needs_plt = 0;
1789 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1790 }
1791 }
1792 else
1793 {
1794 h->plt.offset = (bfd_vma) -1;
1795 h->needs_plt = 0;
1796 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1797 }
1798
1799 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1800 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1801 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1802 we can save the dynamic TLS relocation. */
1803 if (h->got.refcount > 0
1804 && !bfd_link_pic (info)
1805 && h->dynindx == -1
1806 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1807 {
1808 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1809 /* For the GOTIE access without a literal pool entry the offset has
1810 to be stored somewhere. The immediate value in the instruction
1811 is not bit enough so the value is stored in the got. */
1812 {
1813 h->got.offset = htab->elf.sgot->size;
1814 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1815 }
1816 else
1817 h->got.offset = (bfd_vma) -1;
1818 }
1819 else if (h->got.refcount > 0)
1820 {
1821 asection *s;
1822 bfd_boolean dyn;
1823 int tls_type = elf_s390_hash_entry(h)->tls_type;
1824
1825 /* Make sure this symbol is output as a dynamic symbol.
1826 Undefined weak syms won't yet be marked as dynamic. */
1827 if (h->dynindx == -1
1828 && !h->forced_local)
1829 {
1830 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1831 return FALSE;
1832 }
1833
1834 s = htab->elf.sgot;
1835 h->got.offset = s->size;
1836 s->size += GOT_ENTRY_SIZE;
1837 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1838 if (tls_type == GOT_TLS_GD)
1839 s->size += GOT_ENTRY_SIZE;
1840 dyn = htab->elf.dynamic_sections_created;
1841 /* R_390_TLS_IE64 needs one dynamic relocation,
1842 R_390_TLS_GD64 needs one if local symbol and two if global. */
1843 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1844 || tls_type >= GOT_TLS_IE)
1845 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1846 else if (tls_type == GOT_TLS_GD)
1847 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1848 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1849 || h->root.type != bfd_link_hash_undefweak)
1850 && (bfd_link_pic (info)
1851 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1852 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1853 }
1854 else
1855 h->got.offset = (bfd_vma) -1;
1856
1857 if (eh->dyn_relocs == NULL)
1858 return TRUE;
1859
1860 /* In the shared -Bsymbolic case, discard space allocated for
1861 dynamic pc-relative relocs against symbols which turn out to be
1862 defined in regular objects. For the normal shared case, discard
1863 space for pc-relative relocs that have become local due to symbol
1864 visibility changes. */
1865
1866 if (bfd_link_pic (info))
1867 {
1868 if (SYMBOL_CALLS_LOCAL (info, h))
1869 {
1870 struct elf_dyn_relocs **pp;
1871
1872 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1873 {
1874 p->count -= p->pc_count;
1875 p->pc_count = 0;
1876 if (p->count == 0)
1877 *pp = p->next;
1878 else
1879 pp = &p->next;
1880 }
1881 }
1882
1883 /* Also discard relocs on undefined weak syms with non-default
1884 visibility. */
1885 if (eh->dyn_relocs != NULL
1886 && h->root.type == bfd_link_hash_undefweak)
1887 {
1888 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1889 eh->dyn_relocs = NULL;
1890
1891 /* Make sure undefined weak symbols are output as a dynamic
1892 symbol in PIEs. */
1893 else if (h->dynindx == -1
1894 && !h->forced_local)
1895 {
1896 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1897 return FALSE;
1898 }
1899 }
1900 }
1901 else if (ELIMINATE_COPY_RELOCS)
1902 {
1903 /* For the non-shared case, discard space for relocs against
1904 symbols which turn out to need copy relocs or are not
1905 dynamic. */
1906
1907 if (!h->non_got_ref
1908 && ((h->def_dynamic
1909 && !h->def_regular)
1910 || (htab->elf.dynamic_sections_created
1911 && (h->root.type == bfd_link_hash_undefweak
1912 || h->root.type == bfd_link_hash_undefined))))
1913 {
1914 /* Make sure this symbol is output as a dynamic symbol.
1915 Undefined weak syms won't yet be marked as dynamic. */
1916 if (h->dynindx == -1
1917 && !h->forced_local)
1918 {
1919 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1920 return FALSE;
1921 }
1922
1923 /* If that succeeded, we know we'll be keeping all the
1924 relocs. */
1925 if (h->dynindx != -1)
1926 goto keep;
1927 }
1928
1929 eh->dyn_relocs = NULL;
1930
1931 keep: ;
1932 }
1933
1934 /* Finally, allocate space. */
1935 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1936 {
1937 asection *sreloc = elf_section_data (p->sec)->sreloc;
1938 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1939 }
1940
1941 return TRUE;
1942 }
1943
1944 /* Find any dynamic relocs that apply to read-only sections. */
1945
1946 static bfd_boolean
1947 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1948 {
1949 struct elf_s390_link_hash_entry *eh;
1950 struct elf_dyn_relocs *p;
1951
1952 eh = (struct elf_s390_link_hash_entry *) h;
1953 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1954 {
1955 asection *s = p->sec->output_section;
1956
1957 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1958 {
1959 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1960
1961 info->flags |= DF_TEXTREL;
1962
1963 /* Not an error, just cut short the traversal. */
1964 return FALSE;
1965 }
1966 }
1967 return TRUE;
1968 }
1969
1970 /* Set the sizes of the dynamic sections. */
1971
1972 static bfd_boolean
1973 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1974 struct bfd_link_info *info)
1975 {
1976 struct elf_s390_link_hash_table *htab;
1977 bfd *dynobj;
1978 asection *s;
1979 bfd_boolean relocs;
1980 bfd *ibfd;
1981
1982 htab = elf_s390_hash_table (info);
1983 if (htab == NULL)
1984 return FALSE;
1985
1986 dynobj = htab->elf.dynobj;
1987 if (dynobj == NULL)
1988 abort ();
1989
1990 if (htab->elf.dynamic_sections_created)
1991 {
1992 /* Set the contents of the .interp section to the interpreter. */
1993 if (bfd_link_executable (info) && !info->nointerp)
1994 {
1995 s = bfd_get_linker_section (dynobj, ".interp");
1996 if (s == NULL)
1997 abort ();
1998 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1999 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2000 }
2001 }
2002
2003 /* Set up .got offsets for local syms, and space for local dynamic
2004 relocs. */
2005 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2006 {
2007 bfd_signed_vma *local_got;
2008 bfd_signed_vma *end_local_got;
2009 char *local_tls_type;
2010 bfd_size_type locsymcount;
2011 Elf_Internal_Shdr *symtab_hdr;
2012 asection *srela;
2013 struct plt_entry *local_plt;
2014 unsigned int i;
2015
2016 if (! is_s390_elf (ibfd))
2017 continue;
2018
2019 for (s = ibfd->sections; s != NULL; s = s->next)
2020 {
2021 struct elf_dyn_relocs *p;
2022
2023 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2024 {
2025 if (!bfd_is_abs_section (p->sec)
2026 && bfd_is_abs_section (p->sec->output_section))
2027 {
2028 /* Input section has been discarded, either because
2029 it is a copy of a linkonce section or due to
2030 linker script /DISCARD/, so we'll be discarding
2031 the relocs too. */
2032 }
2033 else if (p->count != 0)
2034 {
2035 srela = elf_section_data (p->sec)->sreloc;
2036 srela->size += p->count * sizeof (Elf64_External_Rela);
2037 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2038 info->flags |= DF_TEXTREL;
2039 }
2040 }
2041 }
2042
2043 local_got = elf_local_got_refcounts (ibfd);
2044 if (!local_got)
2045 continue;
2046
2047 symtab_hdr = &elf_symtab_hdr (ibfd);
2048 locsymcount = symtab_hdr->sh_info;
2049 end_local_got = local_got + locsymcount;
2050 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2051 s = htab->elf.sgot;
2052 srela = htab->elf.srelgot;
2053 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2054 {
2055 if (*local_got > 0)
2056 {
2057 *local_got = s->size;
2058 s->size += GOT_ENTRY_SIZE;
2059 if (*local_tls_type == GOT_TLS_GD)
2060 s->size += GOT_ENTRY_SIZE;
2061 if (bfd_link_pic (info))
2062 srela->size += sizeof (Elf64_External_Rela);
2063 }
2064 else
2065 *local_got = (bfd_vma) -1;
2066 }
2067
2068 local_plt = elf_s390_local_plt (ibfd);
2069 for (i = 0; i < symtab_hdr->sh_info; i++)
2070 {
2071 if (local_plt[i].plt.refcount > 0)
2072 {
2073 local_plt[i].plt.offset = htab->elf.iplt->size;
2074 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2075 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2076 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2077 }
2078 else
2079 local_plt[i].plt.offset = (bfd_vma) -1;
2080 }
2081 }
2082
2083 if (htab->tls_ldm_got.refcount > 0)
2084 {
2085 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2086 relocs. */
2087 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2088 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2089 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2090 }
2091 else
2092 htab->tls_ldm_got.offset = -1;
2093
2094 /* Allocate global sym .plt and .got entries, and space for global
2095 sym dynamic relocs. */
2096 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2097
2098 /* We now have determined the sizes of the various dynamic sections.
2099 Allocate memory for them. */
2100 relocs = FALSE;
2101 for (s = dynobj->sections; s != NULL; s = s->next)
2102 {
2103 if ((s->flags & SEC_LINKER_CREATED) == 0)
2104 continue;
2105
2106 if (s == htab->elf.splt
2107 || s == htab->elf.sgot
2108 || s == htab->elf.sgotplt
2109 || s == htab->sdynbss
2110 || s == htab->elf.iplt
2111 || s == htab->elf.igotplt
2112 || s == htab->irelifunc)
2113 {
2114 /* Strip this section if we don't need it; see the
2115 comment below. */
2116 }
2117 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2118 {
2119 if (s->size != 0 && s != htab->elf.srelplt)
2120 relocs = TRUE;
2121
2122 /* We use the reloc_count field as a counter if we need
2123 to copy relocs into the output file. */
2124 s->reloc_count = 0;
2125 }
2126 else
2127 {
2128 /* It's not one of our sections, so don't allocate space. */
2129 continue;
2130 }
2131
2132 if (s->size == 0)
2133 {
2134 /* If we don't need this section, strip it from the
2135 output file. This is to handle .rela.bss and
2136 .rela.plt. We must create it in
2137 create_dynamic_sections, because it must be created
2138 before the linker maps input sections to output
2139 sections. The linker does that before
2140 adjust_dynamic_symbol is called, and it is that
2141 function which decides whether anything needs to go
2142 into these sections. */
2143
2144 s->flags |= SEC_EXCLUDE;
2145 continue;
2146 }
2147
2148 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2149 continue;
2150
2151 /* Allocate memory for the section contents. We use bfd_zalloc
2152 here in case unused entries are not reclaimed before the
2153 section's contents are written out. This should not happen,
2154 but this way if it does, we get a R_390_NONE reloc instead
2155 of garbage. */
2156 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2157 if (s->contents == NULL)
2158 return FALSE;
2159 }
2160
2161 if (htab->elf.dynamic_sections_created)
2162 {
2163 /* Add some entries to the .dynamic section. We fill in the
2164 values later, in elf_s390_finish_dynamic_sections, but we
2165 must add the entries now so that we get the correct size for
2166 the .dynamic section. The DT_DEBUG entry is filled in by the
2167 dynamic linker and used by the debugger. */
2168 #define add_dynamic_entry(TAG, VAL) \
2169 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2170
2171 if (bfd_link_executable (info))
2172 {
2173 if (!add_dynamic_entry (DT_DEBUG, 0))
2174 return FALSE;
2175 }
2176
2177 if (htab->elf.splt->size != 0)
2178 {
2179 if (!add_dynamic_entry (DT_PLTGOT, 0)
2180 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2181 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2182 || !add_dynamic_entry (DT_JMPREL, 0))
2183 return FALSE;
2184 }
2185
2186 if (relocs)
2187 {
2188 if (!add_dynamic_entry (DT_RELA, 0)
2189 || !add_dynamic_entry (DT_RELASZ, 0)
2190 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2191 return FALSE;
2192
2193 /* If any dynamic relocs apply to a read-only section,
2194 then we need a DT_TEXTREL entry. */
2195 if ((info->flags & DF_TEXTREL) == 0)
2196 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2197 info);
2198
2199 if ((info->flags & DF_TEXTREL) != 0)
2200 {
2201 if (!add_dynamic_entry (DT_TEXTREL, 0))
2202 return FALSE;
2203 }
2204 }
2205 }
2206 #undef add_dynamic_entry
2207
2208 return TRUE;
2209 }
2210
2211 /* Return the base VMA address which should be subtracted from real addresses
2212 when resolving @dtpoff relocation.
2213 This is PT_TLS segment p_vaddr. */
2214
2215 static bfd_vma
2216 dtpoff_base (struct bfd_link_info *info)
2217 {
2218 /* If tls_sec is NULL, we should have signalled an error already. */
2219 if (elf_hash_table (info)->tls_sec == NULL)
2220 return 0;
2221 return elf_hash_table (info)->tls_sec->vma;
2222 }
2223
2224 /* Return the relocation value for @tpoff relocation
2225 if STT_TLS virtual address is ADDRESS. */
2226
2227 static bfd_vma
2228 tpoff (struct bfd_link_info *info, bfd_vma address)
2229 {
2230 struct elf_link_hash_table *htab = elf_hash_table (info);
2231
2232 /* If tls_sec is NULL, we should have signalled an error already. */
2233 if (htab->tls_sec == NULL)
2234 return 0;
2235 return htab->tls_size + htab->tls_sec->vma - address;
2236 }
2237
2238 /* Complain if TLS instruction relocation is against an invalid
2239 instruction. */
2240
2241 static void
2242 invalid_tls_insn (bfd *input_bfd,
2243 asection *input_section,
2244 Elf_Internal_Rela *rel)
2245 {
2246 reloc_howto_type *howto;
2247
2248 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2249 (*_bfd_error_handler)
2250 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2251 input_bfd,
2252 input_section,
2253 (long) rel->r_offset,
2254 howto->name);
2255 bfd_set_error (bfd_error_bad_value);
2256 }
2257
2258 /* Relocate a 390 ELF section. */
2259
2260 static bfd_boolean
2261 elf_s390_relocate_section (bfd *output_bfd,
2262 struct bfd_link_info *info,
2263 bfd *input_bfd,
2264 asection *input_section,
2265 bfd_byte *contents,
2266 Elf_Internal_Rela *relocs,
2267 Elf_Internal_Sym *local_syms,
2268 asection **local_sections)
2269 {
2270 struct elf_s390_link_hash_table *htab;
2271 Elf_Internal_Shdr *symtab_hdr;
2272 struct elf_link_hash_entry **sym_hashes;
2273 bfd_vma *local_got_offsets;
2274 Elf_Internal_Rela *rel;
2275 Elf_Internal_Rela *relend;
2276
2277 BFD_ASSERT (is_s390_elf (input_bfd));
2278
2279 htab = elf_s390_hash_table (info);
2280 if (htab == NULL)
2281 return FALSE;
2282
2283 symtab_hdr = &elf_symtab_hdr (input_bfd);
2284 sym_hashes = elf_sym_hashes (input_bfd);
2285 local_got_offsets = elf_local_got_offsets (input_bfd);
2286
2287 rel = relocs;
2288 relend = relocs + input_section->reloc_count;
2289 for (; rel < relend; rel++)
2290 {
2291 unsigned int r_type;
2292 reloc_howto_type *howto;
2293 unsigned long r_symndx;
2294 struct elf_link_hash_entry *h;
2295 Elf_Internal_Sym *sym;
2296 asection *sec;
2297 bfd_vma off;
2298 bfd_vma relocation;
2299 bfd_boolean unresolved_reloc;
2300 bfd_reloc_status_type r;
2301 int tls_type;
2302 asection *base_got = htab->elf.sgot;
2303
2304 r_type = ELF64_R_TYPE (rel->r_info);
2305 if (r_type == (int) R_390_GNU_VTINHERIT
2306 || r_type == (int) R_390_GNU_VTENTRY)
2307 continue;
2308 if (r_type >= (int) R_390_max)
2309 {
2310 bfd_set_error (bfd_error_bad_value);
2311 return FALSE;
2312 }
2313
2314 howto = elf_howto_table + r_type;
2315 r_symndx = ELF64_R_SYM (rel->r_info);
2316
2317 h = NULL;
2318 sym = NULL;
2319 sec = NULL;
2320 unresolved_reloc = FALSE;
2321 if (r_symndx < symtab_hdr->sh_info)
2322 {
2323 sym = local_syms + r_symndx;
2324 sec = local_sections[r_symndx];
2325
2326 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2327 {
2328 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2329 if (local_plt == NULL)
2330 return FALSE;
2331
2332 /* Address of the PLT slot. */
2333 relocation = (htab->elf.iplt->output_section->vma
2334 + htab->elf.iplt->output_offset
2335 + local_plt[r_symndx].plt.offset);
2336
2337 switch (r_type)
2338 {
2339 case R_390_PLTOFF16:
2340 case R_390_PLTOFF32:
2341 case R_390_PLTOFF64:
2342 relocation -= htab->elf.sgot->output_section->vma;
2343 break;
2344 case R_390_GOTPLT12:
2345 case R_390_GOTPLT16:
2346 case R_390_GOTPLT20:
2347 case R_390_GOTPLT32:
2348 case R_390_GOTPLT64:
2349 case R_390_GOTPLTENT:
2350 case R_390_GOT12:
2351 case R_390_GOT16:
2352 case R_390_GOT20:
2353 case R_390_GOT32:
2354 case R_390_GOT64:
2355 case R_390_GOTENT:
2356 {
2357 /* Write the PLT slot address into the GOT slot. */
2358 bfd_put_64 (output_bfd, relocation,
2359 htab->elf.sgot->contents +
2360 local_got_offsets[r_symndx]);
2361 relocation = (local_got_offsets[r_symndx] +
2362 htab->elf.sgot->output_offset);
2363
2364 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2365 relocation += htab->elf.sgot->output_section->vma;
2366 break;
2367 }
2368 default:
2369 break;
2370 }
2371 /* The output section is needed later in
2372 finish_dynamic_section when creating the dynamic
2373 relocation. */
2374 local_plt[r_symndx].sec = sec;
2375 goto do_relocation;
2376 }
2377 else
2378 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2379 }
2380 else
2381 {
2382 bfd_boolean warned ATTRIBUTE_UNUSED;
2383 bfd_boolean ignored ATTRIBUTE_UNUSED;
2384
2385 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2386 r_symndx, symtab_hdr, sym_hashes,
2387 h, sec, relocation,
2388 unresolved_reloc, warned, ignored);
2389 }
2390
2391 if (sec != NULL && discarded_section (sec))
2392 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2393 rel, 1, relend, howto, 0, contents);
2394
2395 if (bfd_link_relocatable (info))
2396 continue;
2397
2398 switch (r_type)
2399 {
2400 case R_390_GOTPLT12:
2401 case R_390_GOTPLT16:
2402 case R_390_GOTPLT20:
2403 case R_390_GOTPLT32:
2404 case R_390_GOTPLT64:
2405 case R_390_GOTPLTENT:
2406 /* There are three cases for a GOTPLT relocation. 1) The
2407 relocation is against the jump slot entry of a plt that
2408 will get emitted to the output file. 2) The relocation
2409 is against the jump slot of a plt entry that has been
2410 removed. elf_s390_adjust_gotplt has created a GOT entry
2411 as replacement. 3) The relocation is against a local symbol.
2412 Cases 2) and 3) are the same as the GOT relocation code
2413 so we just have to test for case 1 and fall through for
2414 the other two. */
2415 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2416 {
2417 bfd_vma plt_index;
2418
2419 if (s390_is_ifunc_symbol_p (h))
2420 {
2421 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2422 relocation = (plt_index * GOT_ENTRY_SIZE +
2423 htab->elf.igotplt->output_offset);
2424 if (r_type == R_390_GOTPLTENT)
2425 relocation += htab->elf.igotplt->output_section->vma;
2426 }
2427 else
2428 {
2429 /* Calc. index no.
2430 Current offset - size first entry / entry size. */
2431 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2432 PLT_ENTRY_SIZE;
2433
2434 /* Offset in GOT is PLT index plus GOT headers(3)
2435 times 4, addr & GOT addr. */
2436 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2437 if (r_type == R_390_GOTPLTENT)
2438 relocation += htab->elf.sgot->output_section->vma;
2439 }
2440 unresolved_reloc = FALSE;
2441 break;
2442 }
2443 /* Fall through. */
2444
2445 case R_390_GOT12:
2446 case R_390_GOT16:
2447 case R_390_GOT20:
2448 case R_390_GOT32:
2449 case R_390_GOT64:
2450 case R_390_GOTENT:
2451 /* Relocation is to the entry for this symbol in the global
2452 offset table. */
2453 if (base_got == NULL)
2454 abort ();
2455
2456 if (h != NULL)
2457 {
2458 bfd_boolean dyn;
2459
2460 off = h->got.offset;
2461 dyn = htab->elf.dynamic_sections_created;
2462
2463 if (s390_is_ifunc_symbol_p (h))
2464 {
2465 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2466 if (off == (bfd_vma)-1)
2467 {
2468 /* No explicit GOT usage so redirect to the
2469 got.iplt slot. */
2470 base_got = htab->elf.igotplt;
2471 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2472 }
2473 else
2474 {
2475 /* Explicit GOT slots must contain the address
2476 of the PLT slot. This will be handled in
2477 finish_dynamic_symbol. */
2478 }
2479 }
2480 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2481 bfd_link_pic (info),
2482 h)
2483 || (bfd_link_pic (info)
2484 && SYMBOL_REFERENCES_LOCAL (info, h))
2485 || (ELF_ST_VISIBILITY (h->other)
2486 && h->root.type == bfd_link_hash_undefweak))
2487 {
2488 /* This is actually a static link, or it is a
2489 -Bsymbolic link and the symbol is defined
2490 locally, or the symbol was forced to be local
2491 because of a version file. We must initialize
2492 this entry in the global offset table. Since the
2493 offset must always be a multiple of 2, we use the
2494 least significant bit to record whether we have
2495 initialized it already.
2496
2497 When doing a dynamic link, we create a .rel.got
2498 relocation entry to initialize the value. This
2499 is done in the finish_dynamic_symbol routine. */
2500 if ((off & 1) != 0)
2501 off &= ~1;
2502 else
2503 {
2504 bfd_put_64 (output_bfd, relocation,
2505 base_got->contents + off);
2506 h->got.offset |= 1;
2507 }
2508
2509 if ((h->def_regular
2510 && bfd_link_pic (info)
2511 && SYMBOL_REFERENCES_LOCAL (info, h))
2512 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2513 && ((r_type == R_390_GOTENT
2514 && (bfd_get_16 (input_bfd,
2515 contents + rel->r_offset - 2)
2516 & 0xff0f) == 0xc408)
2517 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2518 || (r_type == R_390_GOT20
2519 && (bfd_get_32 (input_bfd,
2520 contents + rel->r_offset - 2)
2521 & 0xff00f000) == 0xe300c000
2522 && bfd_get_8 (input_bfd,
2523 contents + rel->r_offset + 3) == 0x04)))
2524
2525 {
2526 unsigned short new_insn =
2527 (0xc000 | (bfd_get_8 (input_bfd,
2528 contents + rel->r_offset - 1) & 0xf0));
2529 bfd_put_16 (output_bfd, new_insn,
2530 contents + rel->r_offset - 2);
2531 r_type = R_390_PC32DBL;
2532 rel->r_addend = 2;
2533 howto = elf_howto_table + r_type;
2534 relocation = h->root.u.def.value
2535 + h->root.u.def.section->output_section->vma
2536 + h->root.u.def.section->output_offset;
2537 goto do_relocation;
2538 }
2539 }
2540 else
2541 unresolved_reloc = FALSE;
2542 }
2543 else
2544 {
2545 if (local_got_offsets == NULL)
2546 abort ();
2547
2548 off = local_got_offsets[r_symndx];
2549
2550 /* The offset must always be a multiple of 8. We use
2551 the least significant bit to record whether we have
2552 already generated the necessary reloc. */
2553 if ((off & 1) != 0)
2554 off &= ~1;
2555 else
2556 {
2557 bfd_put_64 (output_bfd, relocation,
2558 htab->elf.sgot->contents + off);
2559
2560 if (bfd_link_pic (info))
2561 {
2562 asection *s;
2563 Elf_Internal_Rela outrel;
2564 bfd_byte *loc;
2565
2566 s = htab->elf.srelgot;
2567 if (s == NULL)
2568 abort ();
2569
2570 outrel.r_offset = (htab->elf.sgot->output_section->vma
2571 + htab->elf.sgot->output_offset
2572 + off);
2573 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2574 outrel.r_addend = relocation;
2575 loc = s->contents;
2576 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2577 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2578 }
2579
2580 local_got_offsets[r_symndx] |= 1;
2581 }
2582 }
2583
2584 if (off >= (bfd_vma) -2)
2585 abort ();
2586
2587 relocation = base_got->output_offset + off;
2588
2589 /* For @GOTENT the relocation is against the offset between
2590 the instruction and the symbols entry in the GOT and not
2591 between the start of the GOT and the symbols entry. We
2592 add the vma of the GOT to get the correct value. */
2593 if ( r_type == R_390_GOTENT
2594 || r_type == R_390_GOTPLTENT)
2595 relocation += base_got->output_section->vma;
2596
2597 break;
2598
2599 case R_390_GOTOFF16:
2600 case R_390_GOTOFF32:
2601 case R_390_GOTOFF64:
2602 /* Relocation is relative to the start of the global offset
2603 table. */
2604
2605 /* Note that sgot->output_offset is not involved in this
2606 calculation. We always want the start of .got. If we
2607 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2608 permitted by the ABI, we might have to change this
2609 calculation. */
2610 relocation -= htab->elf.sgot->output_section->vma;
2611 break;
2612
2613 case R_390_GOTPC:
2614 case R_390_GOTPCDBL:
2615 /* Use global offset table as symbol value. */
2616 relocation = htab->elf.sgot->output_section->vma;
2617 unresolved_reloc = FALSE;
2618 break;
2619
2620 case R_390_PLT12DBL:
2621 case R_390_PLT16DBL:
2622 case R_390_PLT24DBL:
2623 case R_390_PLT32:
2624 case R_390_PLT32DBL:
2625 case R_390_PLT64:
2626 /* Relocation is to the entry for this symbol in the
2627 procedure linkage table. */
2628
2629 /* Resolve a PLT32 reloc against a local symbol directly,
2630 without using the procedure linkage table. */
2631 if (h == NULL)
2632 break;
2633
2634 if (h->plt.offset == (bfd_vma) -1
2635 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2636 {
2637 /* We didn't make a PLT entry for this symbol. This
2638 happens when statically linking PIC code, or when
2639 using -Bsymbolic. */
2640 break;
2641 }
2642 if (s390_is_ifunc_symbol_p (h))
2643 relocation = (htab->elf.iplt->output_section->vma
2644 + htab->elf.iplt->output_offset
2645 + h->plt.offset);
2646 else
2647 relocation = (htab->elf.splt->output_section->vma
2648 + htab->elf.splt->output_offset
2649 + h->plt.offset);
2650 unresolved_reloc = FALSE;
2651 break;
2652
2653 case R_390_PLTOFF16:
2654 case R_390_PLTOFF32:
2655 case R_390_PLTOFF64:
2656 /* Relocation is to the entry for this symbol in the
2657 procedure linkage table relative to the start of the GOT. */
2658
2659 /* For local symbols or if we didn't make a PLT entry for
2660 this symbol resolve the symbol directly. */
2661 if (h == NULL
2662 || h->plt.offset == (bfd_vma) -1
2663 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2664 {
2665 relocation -= htab->elf.sgot->output_section->vma;
2666 break;
2667 }
2668
2669 if (s390_is_ifunc_symbol_p (h))
2670 relocation = (htab->elf.iplt->output_section->vma
2671 + htab->elf.iplt->output_offset
2672 + h->plt.offset
2673 - htab->elf.sgot->output_section->vma);
2674 else
2675 relocation = (htab->elf.splt->output_section->vma
2676 + htab->elf.splt->output_offset
2677 + h->plt.offset
2678 - htab->elf.sgot->output_section->vma);
2679 unresolved_reloc = FALSE;
2680 break;
2681
2682 case R_390_8:
2683 case R_390_16:
2684 case R_390_32:
2685 case R_390_64:
2686 case R_390_PC16:
2687 case R_390_PC12DBL:
2688 case R_390_PC16DBL:
2689 case R_390_PC24DBL:
2690 case R_390_PC32:
2691 case R_390_PC32DBL:
2692 case R_390_PC64:
2693
2694 if (h != NULL
2695 && s390_is_ifunc_symbol_p (h)
2696 && h->def_regular)
2697 {
2698 if (!bfd_link_pic (info) || !h->non_got_ref)
2699 {
2700 /* For a non-shared object STT_GNU_IFUNC symbol must
2701 go through PLT. */
2702 relocation = (htab->elf.iplt->output_section->vma
2703 + htab->elf.iplt->output_offset
2704 + h ->plt.offset);
2705 goto do_relocation;
2706 }
2707 else
2708 {
2709 /* For shared objects a runtime relocation is needed. */
2710
2711 Elf_Internal_Rela outrel;
2712 asection *sreloc;
2713
2714 /* Need a dynamic relocation to get the real function
2715 address. */
2716 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2717 info,
2718 input_section,
2719 rel->r_offset);
2720 if (outrel.r_offset == (bfd_vma) -1
2721 || outrel.r_offset == (bfd_vma) -2)
2722 abort ();
2723
2724 outrel.r_offset += (input_section->output_section->vma
2725 + input_section->output_offset);
2726
2727 if (h->dynindx == -1
2728 || h->forced_local
2729 || bfd_link_executable (info))
2730 {
2731 /* This symbol is resolved locally. */
2732 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2733 outrel.r_addend = (h->root.u.def.value
2734 + h->root.u.def.section->output_section->vma
2735 + h->root.u.def.section->output_offset);
2736 }
2737 else
2738 {
2739 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2740 outrel.r_addend = 0;
2741 }
2742
2743 sreloc = htab->elf.irelifunc;
2744 elf_append_rela (output_bfd, sreloc, &outrel);
2745
2746 /* If this reloc is against an external symbol, we
2747 do not want to fiddle with the addend. Otherwise,
2748 we need to include the symbol value so that it
2749 becomes an addend for the dynamic reloc. For an
2750 internal symbol, we have updated addend. */
2751 continue;
2752 }
2753 }
2754
2755 if ((input_section->flags & SEC_ALLOC) == 0)
2756 break;
2757
2758 if ((bfd_link_pic (info)
2759 && (h == NULL
2760 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2761 || h->root.type != bfd_link_hash_undefweak)
2762 && ((r_type != R_390_PC16
2763 && r_type != R_390_PC12DBL
2764 && r_type != R_390_PC16DBL
2765 && r_type != R_390_PC24DBL
2766 && r_type != R_390_PC32
2767 && r_type != R_390_PC32DBL
2768 && r_type != R_390_PC64)
2769 || !SYMBOL_CALLS_LOCAL (info, h)))
2770 || (ELIMINATE_COPY_RELOCS
2771 && !bfd_link_pic (info)
2772 && h != NULL
2773 && h->dynindx != -1
2774 && !h->non_got_ref
2775 && ((h->def_dynamic
2776 && !h->def_regular)
2777 || h->root.type == bfd_link_hash_undefweak
2778 || h->root.type == bfd_link_hash_undefined)))
2779 {
2780 Elf_Internal_Rela outrel;
2781 bfd_boolean skip, relocate;
2782 asection *sreloc;
2783 bfd_byte *loc;
2784
2785 /* When generating a shared object, these relocations
2786 are copied into the output file to be resolved at run
2787 time. */
2788 skip = FALSE;
2789 relocate = FALSE;
2790
2791 outrel.r_offset =
2792 _bfd_elf_section_offset (output_bfd, info, input_section,
2793 rel->r_offset);
2794 if (outrel.r_offset == (bfd_vma) -1)
2795 skip = TRUE;
2796 else if (outrel.r_offset == (bfd_vma) -2)
2797 skip = TRUE, relocate = TRUE;
2798
2799 outrel.r_offset += (input_section->output_section->vma
2800 + input_section->output_offset);
2801
2802 if (skip)
2803 memset (&outrel, 0, sizeof outrel);
2804 else if (h != NULL
2805 && h->dynindx != -1
2806 && (r_type == R_390_PC16
2807 || r_type == R_390_PC12DBL
2808 || r_type == R_390_PC16DBL
2809 || r_type == R_390_PC24DBL
2810 || r_type == R_390_PC32
2811 || r_type == R_390_PC32DBL
2812 || r_type == R_390_PC64
2813 || !bfd_link_pic (info)
2814 || !SYMBOLIC_BIND (info, h)
2815 || !h->def_regular))
2816 {
2817 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2818 outrel.r_addend = rel->r_addend;
2819 }
2820 else
2821 {
2822 /* This symbol is local, or marked to become local. */
2823 outrel.r_addend = relocation + rel->r_addend;
2824 if (r_type == R_390_64)
2825 {
2826 relocate = TRUE;
2827 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2828 }
2829 else
2830 {
2831 long sindx;
2832
2833 if (bfd_is_abs_section (sec))
2834 sindx = 0;
2835 else if (sec == NULL || sec->owner == NULL)
2836 {
2837 bfd_set_error(bfd_error_bad_value);
2838 return FALSE;
2839 }
2840 else
2841 {
2842 asection *osec;
2843
2844 osec = sec->output_section;
2845 sindx = elf_section_data (osec)->dynindx;
2846
2847 if (sindx == 0)
2848 {
2849 osec = htab->elf.text_index_section;
2850 sindx = elf_section_data (osec)->dynindx;
2851 }
2852 BFD_ASSERT (sindx != 0);
2853
2854 /* We are turning this relocation into one
2855 against a section symbol, so subtract out
2856 the output section's address but not the
2857 offset of the input section in the output
2858 section. */
2859 outrel.r_addend -= osec->vma;
2860 }
2861 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2862 }
2863 }
2864
2865 sreloc = elf_section_data (input_section)->sreloc;
2866 if (sreloc == NULL)
2867 abort ();
2868
2869 loc = sreloc->contents;
2870 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2871 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2872
2873 /* If this reloc is against an external symbol, we do
2874 not want to fiddle with the addend. Otherwise, we
2875 need to include the symbol value so that it becomes
2876 an addend for the dynamic reloc. */
2877 if (! relocate)
2878 continue;
2879 }
2880
2881 break;
2882
2883 /* Relocations for tls literal pool entries. */
2884 case R_390_TLS_IE64:
2885 if (bfd_link_pic (info))
2886 {
2887 Elf_Internal_Rela outrel;
2888 asection *sreloc;
2889 bfd_byte *loc;
2890
2891 outrel.r_offset = rel->r_offset
2892 + input_section->output_section->vma
2893 + input_section->output_offset;
2894 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2895 sreloc = elf_section_data (input_section)->sreloc;
2896 if (sreloc == NULL)
2897 abort ();
2898 loc = sreloc->contents;
2899 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2900 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2901 }
2902 /* Fall through. */
2903
2904 case R_390_TLS_GD64:
2905 case R_390_TLS_GOTIE64:
2906 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2907 tls_type = GOT_UNKNOWN;
2908 if (h == NULL && local_got_offsets)
2909 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2910 else if (h != NULL)
2911 {
2912 tls_type = elf_s390_hash_entry(h)->tls_type;
2913 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2914 r_type = R_390_TLS_LE64;
2915 }
2916 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2917 r_type = R_390_TLS_IE64;
2918
2919 if (r_type == R_390_TLS_LE64)
2920 {
2921 /* This relocation gets optimized away by the local exec
2922 access optimization. */
2923 BFD_ASSERT (! unresolved_reloc);
2924 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2925 contents + rel->r_offset);
2926 continue;
2927 }
2928
2929 if (htab->elf.sgot == NULL)
2930 abort ();
2931
2932 if (h != NULL)
2933 off = h->got.offset;
2934 else
2935 {
2936 if (local_got_offsets == NULL)
2937 abort ();
2938
2939 off = local_got_offsets[r_symndx];
2940 }
2941
2942 emit_tls_relocs:
2943
2944 if ((off & 1) != 0)
2945 off &= ~1;
2946 else
2947 {
2948 Elf_Internal_Rela outrel;
2949 bfd_byte *loc;
2950 int dr_type, indx;
2951
2952 if (htab->elf.srelgot == NULL)
2953 abort ();
2954
2955 outrel.r_offset = (htab->elf.sgot->output_section->vma
2956 + htab->elf.sgot->output_offset + off);
2957
2958 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2959 if (r_type == R_390_TLS_GD64)
2960 dr_type = R_390_TLS_DTPMOD;
2961 else
2962 dr_type = R_390_TLS_TPOFF;
2963 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2964 outrel.r_addend = relocation - dtpoff_base (info);
2965 else
2966 outrel.r_addend = 0;
2967 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2968 loc = htab->elf.srelgot->contents;
2969 loc += htab->elf.srelgot->reloc_count++
2970 * sizeof (Elf64_External_Rela);
2971 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2972
2973 if (r_type == R_390_TLS_GD64)
2974 {
2975 if (indx == 0)
2976 {
2977 BFD_ASSERT (! unresolved_reloc);
2978 bfd_put_64 (output_bfd,
2979 relocation - dtpoff_base (info),
2980 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2981 }
2982 else
2983 {
2984 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2985 outrel.r_offset += GOT_ENTRY_SIZE;
2986 outrel.r_addend = 0;
2987 htab->elf.srelgot->reloc_count++;
2988 loc += sizeof (Elf64_External_Rela);
2989 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2990 }
2991 }
2992
2993 if (h != NULL)
2994 h->got.offset |= 1;
2995 else
2996 local_got_offsets[r_symndx] |= 1;
2997 }
2998
2999 if (off >= (bfd_vma) -2)
3000 abort ();
3001 if (r_type == ELF64_R_TYPE (rel->r_info))
3002 {
3003 relocation = htab->elf.sgot->output_offset + off;
3004 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3005 relocation += htab->elf.sgot->output_section->vma;
3006 unresolved_reloc = FALSE;
3007 }
3008 else
3009 {
3010 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3011 contents + rel->r_offset);
3012 continue;
3013 }
3014 break;
3015
3016 case R_390_TLS_GOTIE12:
3017 case R_390_TLS_GOTIE20:
3018 case R_390_TLS_IEENT:
3019 if (h == NULL)
3020 {
3021 if (local_got_offsets == NULL)
3022 abort();
3023 off = local_got_offsets[r_symndx];
3024 if (bfd_link_pic (info))
3025 goto emit_tls_relocs;
3026 }
3027 else
3028 {
3029 off = h->got.offset;
3030 tls_type = elf_s390_hash_entry(h)->tls_type;
3031 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3032 goto emit_tls_relocs;
3033 }
3034
3035 if (htab->elf.sgot == NULL)
3036 abort ();
3037
3038 BFD_ASSERT (! unresolved_reloc);
3039 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3040 htab->elf.sgot->contents + off);
3041 relocation = htab->elf.sgot->output_offset + off;
3042 if (r_type == R_390_TLS_IEENT)
3043 relocation += htab->elf.sgot->output_section->vma;
3044 unresolved_reloc = FALSE;
3045 break;
3046
3047 case R_390_TLS_LDM64:
3048 if (! bfd_link_pic (info))
3049 /* The literal pool entry this relocation refers to gets ignored
3050 by the optimized code of the local exec model. Do nothing
3051 and the value will turn out zero. */
3052 continue;
3053
3054 if (htab->elf.sgot == NULL)
3055 abort ();
3056
3057 off = htab->tls_ldm_got.offset;
3058 if (off & 1)
3059 off &= ~1;
3060 else
3061 {
3062 Elf_Internal_Rela outrel;
3063 bfd_byte *loc;
3064
3065 if (htab->elf.srelgot == NULL)
3066 abort ();
3067
3068 outrel.r_offset = (htab->elf.sgot->output_section->vma
3069 + htab->elf.sgot->output_offset + off);
3070
3071 bfd_put_64 (output_bfd, 0,
3072 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3073 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3074 outrel.r_addend = 0;
3075 loc = htab->elf.srelgot->contents;
3076 loc += htab->elf.srelgot->reloc_count++
3077 * sizeof (Elf64_External_Rela);
3078 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3079 htab->tls_ldm_got.offset |= 1;
3080 }
3081 relocation = htab->elf.sgot->output_offset + off;
3082 unresolved_reloc = FALSE;
3083 break;
3084
3085 case R_390_TLS_LE64:
3086 if (bfd_link_dll (info))
3087 {
3088 /* Linking a shared library with non-fpic code requires
3089 a R_390_TLS_TPOFF relocation. */
3090 Elf_Internal_Rela outrel;
3091 asection *sreloc;
3092 bfd_byte *loc;
3093 int indx;
3094
3095 outrel.r_offset = rel->r_offset
3096 + input_section->output_section->vma
3097 + input_section->output_offset;
3098 if (h != NULL && h->dynindx != -1)
3099 indx = h->dynindx;
3100 else
3101 indx = 0;
3102 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3103 if (indx == 0)
3104 outrel.r_addend = relocation - dtpoff_base (info);
3105 else
3106 outrel.r_addend = 0;
3107 sreloc = elf_section_data (input_section)->sreloc;
3108 if (sreloc == NULL)
3109 abort ();
3110 loc = sreloc->contents;
3111 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3112 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3113 }
3114 else
3115 {
3116 BFD_ASSERT (! unresolved_reloc);
3117 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3118 contents + rel->r_offset);
3119 }
3120 continue;
3121
3122 case R_390_TLS_LDO64:
3123 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3124 relocation -= dtpoff_base (info);
3125 else
3126 /* When converting LDO to LE, we must negate. */
3127 relocation = -tpoff (info, relocation);
3128 break;
3129
3130 /* Relocations for tls instructions. */
3131 case R_390_TLS_LOAD:
3132 case R_390_TLS_GDCALL:
3133 case R_390_TLS_LDCALL:
3134 tls_type = GOT_UNKNOWN;
3135 if (h == NULL && local_got_offsets)
3136 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3137 else if (h != NULL)
3138 tls_type = elf_s390_hash_entry(h)->tls_type;
3139
3140 if (tls_type == GOT_TLS_GD)
3141 continue;
3142
3143 if (r_type == R_390_TLS_LOAD)
3144 {
3145 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3146 {
3147 /* IE->LE transition. Four valid cases:
3148 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3149 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3150 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3151 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3152 unsigned int insn0, insn1, ry;
3153
3154 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3155 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3156 if (insn1 != 0x0004)
3157 invalid_tls_insn (input_bfd, input_section, rel);
3158 ry = 0;
3159 if ((insn0 & 0xff00f000) == 0xe3000000)
3160 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3161 ry = (insn0 & 0x000f0000);
3162 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3163 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3164 ry = (insn0 & 0x0000f000) << 4;
3165 else if ((insn0 & 0xff00f000) == 0xe300c000)
3166 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3167 ry = (insn0 & 0x000f0000);
3168 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3169 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3170 ry = (insn0 & 0x0000f000) << 4;
3171 else
3172 invalid_tls_insn (input_bfd, input_section, rel);
3173 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3174 insn1 = 0x000d;
3175 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3176 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3177 }
3178 }
3179 else if (r_type == R_390_TLS_GDCALL)
3180 {
3181 unsigned int insn0, insn1;
3182
3183 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3184 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3185 if ((insn0 & 0xffff0000) != 0xc0e50000)
3186 invalid_tls_insn (input_bfd, input_section, rel);
3187 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3188 {
3189 /* GD->LE transition.
3190 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3191 insn0 = 0xc0040000;
3192 insn1 = 0x0000;
3193 }
3194 else
3195 {
3196 /* GD->IE transition.
3197 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3198 insn0 = 0xe322c000;
3199 insn1 = 0x0004;
3200 }
3201 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3202 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3203 }
3204 else if (r_type == R_390_TLS_LDCALL)
3205 {
3206 if (!bfd_link_pic (info))
3207 {
3208 unsigned int insn0, insn1;
3209
3210 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3211 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3212 if ((insn0 & 0xffff0000) != 0xc0e50000)
3213 invalid_tls_insn (input_bfd, input_section, rel);
3214 /* LD->LE transition.
3215 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3216 insn0 = 0xc0040000;
3217 insn1 = 0x0000;
3218 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3219 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3220 }
3221 }
3222 continue;
3223
3224 default:
3225 break;
3226 }
3227
3228 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3229 because such sections are not SEC_ALLOC and thus ld.so will
3230 not process them. */
3231 if (unresolved_reloc
3232 && !((input_section->flags & SEC_DEBUGGING) != 0
3233 && h->def_dynamic)
3234 && _bfd_elf_section_offset (output_bfd, info, input_section,
3235 rel->r_offset) != (bfd_vma) -1)
3236 (*_bfd_error_handler)
3237 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3238 input_bfd,
3239 input_section,
3240 (long) rel->r_offset,
3241 howto->name,
3242 h->root.root.string);
3243
3244 do_relocation:
3245
3246 /* When applying a 24 bit reloc we need to start one byte
3247 earlier. Otherwise the 32 bit get/put bfd operations might
3248 access a byte after the actual section. */
3249 if (r_type == R_390_PC24DBL
3250 || r_type == R_390_PLT24DBL)
3251 rel->r_offset--;
3252
3253 if (r_type == R_390_20
3254 || r_type == R_390_GOT20
3255 || r_type == R_390_GOTPLT20
3256 || r_type == R_390_TLS_GOTIE20)
3257 {
3258 relocation += rel->r_addend;
3259 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3260 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3261 contents, rel->r_offset,
3262 relocation, 0);
3263 }
3264 else
3265 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3266 contents, rel->r_offset,
3267 relocation, rel->r_addend);
3268
3269 if (r != bfd_reloc_ok)
3270 {
3271 const char *name;
3272
3273 if (h != NULL)
3274 name = h->root.root.string;
3275 else
3276 {
3277 name = bfd_elf_string_from_elf_section (input_bfd,
3278 symtab_hdr->sh_link,
3279 sym->st_name);
3280 if (name == NULL)
3281 return FALSE;
3282 if (*name == '\0')
3283 name = bfd_section_name (input_bfd, sec);
3284 }
3285
3286 if (r == bfd_reloc_overflow)
3287 {
3288
3289 if (! ((*info->callbacks->reloc_overflow)
3290 (info, (h ? &h->root : NULL), name, howto->name,
3291 (bfd_vma) 0, input_bfd, input_section,
3292 rel->r_offset)))
3293 return FALSE;
3294 }
3295 else
3296 {
3297 (*_bfd_error_handler)
3298 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3299 input_bfd, input_section,
3300 (long) rel->r_offset, name, (int) r);
3301 return FALSE;
3302 }
3303 }
3304 }
3305
3306 return TRUE;
3307 }
3308
3309 /* Generate the PLT slots together with the dynamic relocations needed
3310 for IFUNC symbols. */
3311
3312 static void
3313 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3314 struct bfd_link_info *info,
3315 struct elf_link_hash_entry *h,
3316 struct elf_s390_link_hash_table *htab,
3317 bfd_vma plt_offset,
3318 bfd_vma resolver_address)
3319 {
3320 bfd_vma plt_index;
3321 bfd_vma got_offset;
3322 Elf_Internal_Rela rela;
3323 bfd_byte *loc;
3324 asection *plt, *gotplt, *relplt;
3325
3326 if (htab->elf.iplt == NULL
3327 || htab->elf.igotplt == NULL
3328 || htab->elf.irelplt == NULL)
3329 abort ();
3330
3331 /* Index of the PLT slot within iplt section. */
3332 plt_index = plt_offset / PLT_ENTRY_SIZE;
3333 plt = htab->elf.iplt;
3334 /* Offset into the igot.plt section. */
3335 got_offset = plt_index * GOT_ENTRY_SIZE;
3336 gotplt = htab->elf.igotplt;
3337 relplt = htab->elf.irelplt;
3338
3339 /* Fill in the blueprint of a PLT. */
3340 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3341 PLT_ENTRY_SIZE);
3342
3343 /* Fixup the relative address to the GOT entry */
3344 bfd_put_32 (output_bfd,
3345 (gotplt->output_section->vma +
3346 gotplt->output_offset + got_offset
3347 - (plt->output_section->vma +
3348 plt->output_offset +
3349 plt_offset))/2,
3350 plt->contents + plt_offset + 2);
3351 /* Fixup the relative branch to PLT 0 */
3352 bfd_put_32 (output_bfd, - (plt->output_offset +
3353 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3354 plt->contents + plt_offset + 24);
3355 /* Fixup offset into .rela.plt section. */
3356 bfd_put_32 (output_bfd, relplt->output_offset +
3357 plt_index * sizeof (Elf64_External_Rela),
3358 plt->contents + plt_offset + 28);
3359
3360 /* Fill in the entry in the global offset table.
3361 Points to instruction after GOT offset. */
3362 bfd_put_64 (output_bfd,
3363 (plt->output_section->vma
3364 + plt->output_offset
3365 + plt_offset
3366 + 14),
3367 gotplt->contents + got_offset);
3368
3369 /* Fill in the entry in the .rela.plt section. */
3370 rela.r_offset = (gotplt->output_section->vma
3371 + gotplt->output_offset
3372 + got_offset);
3373
3374 if (!h
3375 || h->dynindx == -1
3376 || ((bfd_link_executable (info)
3377 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3378 && h->def_regular))
3379 {
3380 /* The symbol can be locally resolved. */
3381 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3382 rela.r_addend = resolver_address;
3383 }
3384 else
3385 {
3386 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3387 rela.r_addend = 0;
3388 }
3389
3390 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3391 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3392 }
3393
3394
3395 /* Finish up dynamic symbol handling. We set the contents of various
3396 dynamic sections here. */
3397
3398 static bfd_boolean
3399 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3400 struct bfd_link_info *info,
3401 struct elf_link_hash_entry *h,
3402 Elf_Internal_Sym *sym)
3403 {
3404 struct elf_s390_link_hash_table *htab;
3405 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3406
3407 htab = elf_s390_hash_table (info);
3408 if (htab == NULL)
3409 return FALSE;
3410
3411 if (h->plt.offset != (bfd_vma) -1)
3412 {
3413 bfd_vma plt_index;
3414 bfd_vma got_offset;
3415 Elf_Internal_Rela rela;
3416 bfd_byte *loc;
3417
3418 /* This symbol has an entry in the procedure linkage table. Set
3419 it up. */
3420 if (s390_is_ifunc_symbol_p (h))
3421 {
3422 /* If we can resolve the IFUNC symbol locally we generate an
3423 IRELATIVE reloc. */
3424 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3425 eh->ifunc_resolver_address +
3426 eh->ifunc_resolver_section->output_offset +
3427 eh->ifunc_resolver_section->output_section->vma);
3428 ;
3429 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3430 symbols is below. */
3431 }
3432 else
3433 {
3434 if (h->dynindx == -1
3435 || htab->elf.splt == NULL
3436 || htab->elf.sgotplt == NULL
3437 || htab->elf.srelplt == NULL)
3438 abort ();
3439
3440 /* Calc. index no.
3441 Current offset - size first entry / entry size. */
3442 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3443
3444 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3445 addr & GOT addr. */
3446 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3447
3448 /* Fill in the blueprint of a PLT. */
3449 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3450 PLT_ENTRY_SIZE);
3451
3452 /* Fixup the relative address to the GOT entry */
3453 bfd_put_32 (output_bfd,
3454 (htab->elf.sgotplt->output_section->vma +
3455 htab->elf.sgotplt->output_offset + got_offset
3456 - (htab->elf.splt->output_section->vma +
3457 htab->elf.splt->output_offset +
3458 h->plt.offset))/2,
3459 htab->elf.splt->contents + h->plt.offset + 2);
3460 /* Fixup the relative branch to PLT 0 */
3461 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3462 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3463 htab->elf.splt->contents + h->plt.offset + 24);
3464 /* Fixup offset into .rela.plt section. */
3465 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3466 htab->elf.splt->contents + h->plt.offset + 28);
3467
3468 /* Fill in the entry in the global offset table.
3469 Points to instruction after GOT offset. */
3470 bfd_put_64 (output_bfd,
3471 (htab->elf.splt->output_section->vma
3472 + htab->elf.splt->output_offset
3473 + h->plt.offset
3474 + 14),
3475 htab->elf.sgotplt->contents + got_offset);
3476
3477 /* Fill in the entry in the .rela.plt section. */
3478 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3479 + htab->elf.sgotplt->output_offset
3480 + got_offset);
3481 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3482 rela.r_addend = 0;
3483 loc = htab->elf.srelplt->contents + plt_index *
3484 sizeof (Elf64_External_Rela);
3485 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3486
3487 if (!h->def_regular)
3488 {
3489 /* Mark the symbol as undefined, rather than as defined in
3490 the .plt section. Leave the value alone. This is a clue
3491 for the dynamic linker, to make function pointer
3492 comparisons work between an application and shared
3493 library. */
3494 sym->st_shndx = SHN_UNDEF;
3495 }
3496 }
3497 }
3498
3499 if (h->got.offset != (bfd_vma) -1
3500 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3501 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3502 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3503 {
3504 Elf_Internal_Rela rela;
3505 bfd_byte *loc;
3506
3507 /* This symbol has an entry in the global offset table. Set it
3508 up. */
3509 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3510 abort ();
3511
3512 rela.r_offset = (htab->elf.sgot->output_section->vma
3513 + htab->elf.sgot->output_offset
3514 + (h->got.offset &~ (bfd_vma) 1));
3515
3516 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3517 {
3518 if (bfd_link_pic (info))
3519 {
3520 /* An explicit GOT slot usage needs GLOB_DAT. If the
3521 symbol references local the implicit got.iplt slot
3522 will be used and the IRELATIVE reloc has been created
3523 above. */
3524 goto do_glob_dat;
3525 }
3526 else
3527 {
3528 /* For non-shared objects explicit GOT slots must be
3529 filled with the PLT slot address for pointer
3530 equality reasons. */
3531 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3532 + htab->elf.iplt->output_offset
3533 + h->plt.offset),
3534 htab->elf.sgot->contents + h->got.offset);
3535 return TRUE;
3536 }
3537 }
3538 else if (bfd_link_pic (info)
3539 && SYMBOL_REFERENCES_LOCAL (info, h))
3540 {
3541 /* If this is a static link, or it is a -Bsymbolic link and
3542 the symbol is defined locally or was forced to be local
3543 because of a version file, we just want to emit a
3544 RELATIVE reloc. The entry in the global offset table
3545 will already have been initialized in the
3546 relocate_section function. */
3547 if (!h->def_regular)
3548 return FALSE;
3549 BFD_ASSERT((h->got.offset & 1) != 0);
3550 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3551 rela.r_addend = (h->root.u.def.value
3552 + h->root.u.def.section->output_section->vma
3553 + h->root.u.def.section->output_offset);
3554 }
3555 else
3556 {
3557 BFD_ASSERT((h->got.offset & 1) == 0);
3558 do_glob_dat:
3559 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3560 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3561 rela.r_addend = 0;
3562 }
3563
3564 loc = htab->elf.srelgot->contents;
3565 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3566 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3567 }
3568
3569 if (h->needs_copy)
3570 {
3571 Elf_Internal_Rela rela;
3572 bfd_byte *loc;
3573
3574 /* This symbols needs a copy reloc. Set it up. */
3575
3576 if (h->dynindx == -1
3577 || (h->root.type != bfd_link_hash_defined
3578 && h->root.type != bfd_link_hash_defweak)
3579 || htab->srelbss == NULL)
3580 abort ();
3581
3582 rela.r_offset = (h->root.u.def.value
3583 + h->root.u.def.section->output_section->vma
3584 + h->root.u.def.section->output_offset);
3585 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3586 rela.r_addend = 0;
3587 loc = htab->srelbss->contents;
3588 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3589 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3590 }
3591
3592 /* Mark some specially defined symbols as absolute. */
3593 if (h == htab->elf.hdynamic
3594 || h == htab->elf.hgot
3595 || h == htab->elf.hplt)
3596 sym->st_shndx = SHN_ABS;
3597
3598 return TRUE;
3599 }
3600
3601 /* Used to decide how to sort relocs in an optimal manner for the
3602 dynamic linker, before writing them out. */
3603
3604 static enum elf_reloc_type_class
3605 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3606 const asection *rel_sec ATTRIBUTE_UNUSED,
3607 const Elf_Internal_Rela *rela)
3608 {
3609 switch ((int) ELF64_R_TYPE (rela->r_info))
3610 {
3611 case R_390_RELATIVE:
3612 return reloc_class_relative;
3613 case R_390_JMP_SLOT:
3614 return reloc_class_plt;
3615 case R_390_COPY:
3616 return reloc_class_copy;
3617 default:
3618 return reloc_class_normal;
3619 }
3620 }
3621
3622 /* Finish up the dynamic sections. */
3623
3624 static bfd_boolean
3625 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3626 struct bfd_link_info *info)
3627 {
3628 struct elf_s390_link_hash_table *htab;
3629 bfd *dynobj;
3630 asection *sdyn;
3631 bfd *ibfd;
3632 unsigned int i;
3633
3634 htab = elf_s390_hash_table (info);
3635 if (htab == NULL)
3636 return FALSE;
3637
3638 dynobj = htab->elf.dynobj;
3639 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3640
3641 if (htab->elf.dynamic_sections_created)
3642 {
3643 Elf64_External_Dyn *dyncon, *dynconend;
3644
3645 if (sdyn == NULL || htab->elf.sgot == NULL)
3646 abort ();
3647
3648 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3649 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3650 for (; dyncon < dynconend; dyncon++)
3651 {
3652 Elf_Internal_Dyn dyn;
3653 asection *s;
3654
3655 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3656
3657 switch (dyn.d_tag)
3658 {
3659 default:
3660 continue;
3661
3662 case DT_PLTGOT:
3663 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3664 break;
3665
3666 case DT_JMPREL:
3667 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3668 break;
3669
3670 case DT_PLTRELSZ:
3671 s = htab->elf.srelplt->output_section;
3672 dyn.d_un.d_val = s->size;
3673 break;
3674
3675 case DT_RELASZ:
3676 /* The procedure linkage table relocs (DT_JMPREL) should
3677 not be included in the overall relocs (DT_RELA).
3678 Therefore, we override the DT_RELASZ entry here to
3679 make it not include the JMPREL relocs. Since the
3680 linker script arranges for .rela.plt to follow all
3681 other relocation sections, we don't have to worry
3682 about changing the DT_RELA entry. */
3683 s = htab->elf.srelplt->output_section;
3684 dyn.d_un.d_val -= s->size;
3685 break;
3686 }
3687
3688 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3689 }
3690
3691 /* Fill in the special first entry in the procedure linkage table. */
3692 if (htab->elf.splt && htab->elf.splt->size > 0)
3693 {
3694 /* fill in blueprint for plt 0 entry */
3695 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3696 PLT_FIRST_ENTRY_SIZE);
3697 /* Fixup relative address to start of GOT */
3698 bfd_put_32 (output_bfd,
3699 (htab->elf.sgotplt->output_section->vma +
3700 htab->elf.sgotplt->output_offset
3701 - htab->elf.splt->output_section->vma - 6)/2,
3702 htab->elf.splt->contents + 8);
3703 }
3704 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3705 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3706 = PLT_ENTRY_SIZE;
3707 }
3708
3709 if (htab->elf.sgotplt)
3710 {
3711 /* Fill in the first three entries in the global offset table. */
3712 if (htab->elf.sgotplt->size > 0)
3713 {
3714 bfd_put_64 (output_bfd,
3715 (sdyn == NULL ? (bfd_vma) 0
3716 : sdyn->output_section->vma + sdyn->output_offset),
3717 htab->elf.sgotplt->contents);
3718 /* One entry for shared object struct ptr. */
3719 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3720 /* One entry for _dl_runtime_resolve. */
3721 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
3722 }
3723
3724 elf_section_data (htab->elf.sgot->output_section)
3725 ->this_hdr.sh_entsize = 8;
3726 }
3727
3728 /* Finish dynamic symbol for local IFUNC symbols. */
3729 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3730 {
3731 struct plt_entry *local_plt;
3732 Elf_Internal_Sym *isym;
3733 Elf_Internal_Shdr *symtab_hdr;
3734
3735 symtab_hdr = &elf_symtab_hdr (ibfd);
3736
3737 local_plt = elf_s390_local_plt (ibfd);
3738 if (local_plt != NULL)
3739 for (i = 0; i < symtab_hdr->sh_info; i++)
3740 {
3741 if (local_plt[i].plt.offset != (bfd_vma) -1)
3742 {
3743 asection *sec = local_plt[i].sec;
3744 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3745 if (isym == NULL)
3746 return FALSE;
3747
3748 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3749 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3750 local_plt[i].plt.offset,
3751 isym->st_value
3752 + sec->output_section->vma
3753 + sec->output_offset);
3754
3755 }
3756 }
3757 }
3758
3759 return TRUE;
3760 }
3761
3762 /* Return address for Ith PLT stub in section PLT, for relocation REL
3763 or (bfd_vma) -1 if it should not be included. */
3764
3765 static bfd_vma
3766 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3767 const arelent *rel ATTRIBUTE_UNUSED)
3768 {
3769 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3770 }
3771
3772 /* Merge backend specific data from an object file to the output
3773 object file when linking. */
3774
3775 static bfd_boolean
3776 elf64_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3777 {
3778 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3779 return TRUE;
3780
3781 if (!elf_s390_merge_obj_attributes (ibfd, obfd))
3782 return FALSE;
3783
3784 return TRUE;
3785 }
3786
3787 /* Why was the hash table entry size definition changed from
3788 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3789 this is the only reason for the s390_elf64_size_info structure. */
3790
3791 const struct elf_size_info s390_elf64_size_info =
3792 {
3793 sizeof (Elf64_External_Ehdr),
3794 sizeof (Elf64_External_Phdr),
3795 sizeof (Elf64_External_Shdr),
3796 sizeof (Elf64_External_Rel),
3797 sizeof (Elf64_External_Rela),
3798 sizeof (Elf64_External_Sym),
3799 sizeof (Elf64_External_Dyn),
3800 sizeof (Elf_External_Note),
3801 8, /* hash-table entry size. */
3802 1, /* internal relocations per external relocations. */
3803 64, /* arch_size. */
3804 3, /* log_file_align. */
3805 ELFCLASS64, EV_CURRENT,
3806 bfd_elf64_write_out_phdrs,
3807 bfd_elf64_write_shdrs_and_ehdr,
3808 bfd_elf64_checksum_contents,
3809 bfd_elf64_write_relocs,
3810 bfd_elf64_swap_symbol_in,
3811 bfd_elf64_swap_symbol_out,
3812 bfd_elf64_slurp_reloc_table,
3813 bfd_elf64_slurp_symbol_table,
3814 bfd_elf64_swap_dyn_in,
3815 bfd_elf64_swap_dyn_out,
3816 bfd_elf64_swap_reloc_in,
3817 bfd_elf64_swap_reloc_out,
3818 bfd_elf64_swap_reloca_in,
3819 bfd_elf64_swap_reloca_out
3820 };
3821
3822 #define TARGET_BIG_SYM s390_elf64_vec
3823 #define TARGET_BIG_NAME "elf64-s390"
3824 #define ELF_ARCH bfd_arch_s390
3825 #define ELF_TARGET_ID S390_ELF_DATA
3826 #define ELF_MACHINE_CODE EM_S390
3827 #define ELF_MACHINE_ALT1 EM_S390_OLD
3828 #define ELF_MAXPAGESIZE 0x1000
3829
3830 #define elf_backend_size_info s390_elf64_size_info
3831
3832 #define elf_backend_can_gc_sections 1
3833 #define elf_backend_can_refcount 1
3834 #define elf_backend_want_got_plt 1
3835 #define elf_backend_plt_readonly 1
3836 #define elf_backend_want_plt_sym 0
3837 #define elf_backend_got_header_size 24
3838 #define elf_backend_rela_normal 1
3839
3840 #define elf_info_to_howto elf_s390_info_to_howto
3841
3842 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3843 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3844 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3845 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3846 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3847
3848 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3849 #define elf_backend_check_relocs elf_s390_check_relocs
3850 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3851 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3852 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3853 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3854 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3855 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3856 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3857 #define elf_backend_relocate_section elf_s390_relocate_section
3858 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3859 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3860 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3861 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3862 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3863
3864 #define bfd_elf64_mkobject elf_s390_mkobject
3865 #define elf_backend_object_p elf_s390_object_p
3866
3867 /* Enable ELF64 archive functions. */
3868 #define bfd_elf64_archive_functions
3869 extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
3870 extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
3871
3872 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3873 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3874 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3875 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3876 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3877 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3878 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3879 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3880 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3881
3882 #include "elf64-target.h"
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