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[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2015 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 {
1596 /* All local STT_GNU_IFUNC references must be treated as local
1597 calls via local PLT. */
1598 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1599 {
1600 bfd_size_type pc_count = 0, count = 0;
1601 struct elf_dyn_relocs **pp;
1602 struct elf_s390_link_hash_entry *eh;
1603 struct elf_dyn_relocs *p;
1604
1605 eh = (struct elf_s390_link_hash_entry *) h;
1606 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1607 {
1608 pc_count += p->pc_count;
1609 p->count -= p->pc_count;
1610 p->pc_count = 0;
1611 count += p->count;
1612 if (p->count == 0)
1613 *pp = p->next;
1614 else
1615 pp = &p->next;
1616 }
1617
1618 if (pc_count || count)
1619 {
1620 h->needs_plt = 1;
1621 h->non_got_ref = 1;
1622 if (h->plt.refcount <= 0)
1623 h->plt.refcount = 1;
1624 else
1625 h->plt.refcount += 1;
1626 }
1627 }
1628
1629 if (h->plt.refcount <= 0)
1630 {
1631 h->plt.offset = (bfd_vma) -1;
1632 h->needs_plt = 0;
1633 }
1634 return TRUE;
1635 }
1636
1637 /* If this is a function, put it in the procedure linkage table. We
1638 will fill in the contents of the procedure linkage table later
1639 (although we could actually do it here). */
1640 if (h->type == STT_FUNC
1641 || h->needs_plt)
1642 {
1643 if (h->plt.refcount <= 0
1644 || SYMBOL_CALLS_LOCAL (info, h)
1645 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1646 && h->root.type == bfd_link_hash_undefweak))
1647 {
1648 /* This case can occur if we saw a PLT32 reloc in an input
1649 file, but the symbol was never referred to by a dynamic
1650 object, or if all references were garbage collected. In
1651 such a case, we don't actually need to build a procedure
1652 linkage table, and we can just do a PC32 reloc instead. */
1653 h->plt.offset = (bfd_vma) -1;
1654 h->needs_plt = 0;
1655 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1656 }
1657
1658 return TRUE;
1659 }
1660 else
1661 /* It's possible that we incorrectly decided a .plt reloc was
1662 needed for an R_390_PC32 reloc to a non-function sym in
1663 check_relocs. We can't decide accurately between function and
1664 non-function syms in check-relocs; Objects loaded later in
1665 the link may change h->type. So fix it now. */
1666 h->plt.offset = (bfd_vma) -1;
1667
1668 /* If this is a weak symbol, and there is a real definition, the
1669 processor independent code will have arranged for us to see the
1670 real definition first, and we can just use the same value. */
1671 if (h->u.weakdef != NULL)
1672 {
1673 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1674 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1675 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1676 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1677 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1678 h->non_got_ref = h->u.weakdef->non_got_ref;
1679 return TRUE;
1680 }
1681
1682 /* This is a reference to a symbol defined by a dynamic object which
1683 is not a function. */
1684
1685 /* If we are creating a shared library, we must presume that the
1686 only references to the symbol are via the global offset table.
1687 For such cases we need not do anything here; the relocations will
1688 be handled correctly by relocate_section. */
1689 if (bfd_link_pic (info))
1690 return TRUE;
1691
1692 /* If there are no references to this symbol that do not use the
1693 GOT, we don't need to generate a copy reloc. */
1694 if (!h->non_got_ref)
1695 return TRUE;
1696
1697 /* If -z nocopyreloc was given, we won't generate them either. */
1698 if (info->nocopyreloc)
1699 {
1700 h->non_got_ref = 0;
1701 return TRUE;
1702 }
1703
1704 if (ELIMINATE_COPY_RELOCS)
1705 {
1706 struct elf_s390_link_hash_entry * eh;
1707 struct elf_dyn_relocs *p;
1708
1709 eh = (struct elf_s390_link_hash_entry *) h;
1710 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1711 {
1712 s = p->sec->output_section;
1713 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1714 break;
1715 }
1716
1717 /* If we didn't find any dynamic relocs in read-only sections, then
1718 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1719 if (p == NULL)
1720 {
1721 h->non_got_ref = 0;
1722 return TRUE;
1723 }
1724 }
1725
1726 /* We must allocate the symbol in our .dynbss section, which will
1727 become part of the .bss section of the executable. There will be
1728 an entry for this symbol in the .dynsym section. The dynamic
1729 object will contain position independent code, so all references
1730 from the dynamic object to this symbol will go through the global
1731 offset table. The dynamic linker will use the .dynsym entry to
1732 determine the address it must put in the global offset table, so
1733 both the dynamic object and the regular object will refer to the
1734 same memory location for the variable. */
1735
1736 htab = elf_s390_hash_table (info);
1737 if (htab == NULL)
1738 return FALSE;
1739
1740 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1741 copy the initial value out of the dynamic object and into the
1742 runtime process image. */
1743 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1744 {
1745 htab->srelbss->size += sizeof (Elf64_External_Rela);
1746 h->needs_copy = 1;
1747 }
1748
1749 s = htab->sdynbss;
1750
1751 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1752 }
1753
1754 /* Allocate space in .plt, .got and associated reloc sections for
1755 dynamic relocs. */
1756
1757 static bfd_boolean
1758 allocate_dynrelocs (struct elf_link_hash_entry *h,
1759 void * inf)
1760 {
1761 struct bfd_link_info *info;
1762 struct elf_s390_link_hash_table *htab;
1763 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1764 struct elf_dyn_relocs *p;
1765
1766 if (h->root.type == bfd_link_hash_indirect)
1767 return TRUE;
1768
1769 info = (struct bfd_link_info *) inf;
1770 htab = elf_s390_hash_table (info);
1771 if (htab == NULL)
1772 return FALSE;
1773
1774 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1775 here if it is defined and referenced in a non-shared object. */
1776 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1777 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1778 else if (htab->elf.dynamic_sections_created
1779 && h->plt.refcount > 0)
1780 {
1781 /* Make sure this symbol is output as a dynamic symbol.
1782 Undefined weak syms won't yet be marked as dynamic. */
1783 if (h->dynindx == -1
1784 && !h->forced_local)
1785 {
1786 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1787 return FALSE;
1788 }
1789
1790 if (bfd_link_pic (info)
1791 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1792 {
1793 asection *s = htab->elf.splt;
1794
1795 /* If this is the first .plt entry, make room for the special
1796 first entry. */
1797 if (s->size == 0)
1798 s->size += PLT_FIRST_ENTRY_SIZE;
1799
1800 h->plt.offset = s->size;
1801
1802 /* If this symbol is not defined in a regular file, and we are
1803 not generating a shared library, then set the symbol to this
1804 location in the .plt. This is required to make function
1805 pointers compare as equal between the normal executable and
1806 the shared library. */
1807 if (! bfd_link_pic (info)
1808 && !h->def_regular)
1809 {
1810 h->root.u.def.section = s;
1811 h->root.u.def.value = h->plt.offset;
1812 }
1813
1814 /* Make room for this entry. */
1815 s->size += PLT_ENTRY_SIZE;
1816
1817 /* We also need to make an entry in the .got.plt section, which
1818 will be placed in the .got section by the linker script. */
1819 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1820
1821 /* We also need to make an entry in the .rela.plt section. */
1822 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1823 }
1824 else
1825 {
1826 h->plt.offset = (bfd_vma) -1;
1827 h->needs_plt = 0;
1828 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1829 }
1830 }
1831 else
1832 {
1833 h->plt.offset = (bfd_vma) -1;
1834 h->needs_plt = 0;
1835 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1836 }
1837
1838 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1839 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1840 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1841 we can save the dynamic TLS relocation. */
1842 if (h->got.refcount > 0
1843 && !bfd_link_pic (info)
1844 && h->dynindx == -1
1845 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1846 {
1847 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1848 /* For the GOTIE access without a literal pool entry the offset has
1849 to be stored somewhere. The immediate value in the instruction
1850 is not bit enough so the value is stored in the got. */
1851 {
1852 h->got.offset = htab->elf.sgot->size;
1853 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1854 }
1855 else
1856 h->got.offset = (bfd_vma) -1;
1857 }
1858 else if (h->got.refcount > 0)
1859 {
1860 asection *s;
1861 bfd_boolean dyn;
1862 int tls_type = elf_s390_hash_entry(h)->tls_type;
1863
1864 /* Make sure this symbol is output as a dynamic symbol.
1865 Undefined weak syms won't yet be marked as dynamic. */
1866 if (h->dynindx == -1
1867 && !h->forced_local)
1868 {
1869 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1870 return FALSE;
1871 }
1872
1873 s = htab->elf.sgot;
1874 h->got.offset = s->size;
1875 s->size += GOT_ENTRY_SIZE;
1876 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1877 if (tls_type == GOT_TLS_GD)
1878 s->size += GOT_ENTRY_SIZE;
1879 dyn = htab->elf.dynamic_sections_created;
1880 /* R_390_TLS_IE64 needs one dynamic relocation,
1881 R_390_TLS_GD64 needs one if local symbol and two if global. */
1882 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1883 || tls_type >= GOT_TLS_IE)
1884 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1885 else if (tls_type == GOT_TLS_GD)
1886 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1887 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1888 || h->root.type != bfd_link_hash_undefweak)
1889 && (bfd_link_pic (info)
1890 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1891 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1892 }
1893 else
1894 h->got.offset = (bfd_vma) -1;
1895
1896 if (eh->dyn_relocs == NULL)
1897 return TRUE;
1898
1899 /* In the shared -Bsymbolic case, discard space allocated for
1900 dynamic pc-relative relocs against symbols which turn out to be
1901 defined in regular objects. For the normal shared case, discard
1902 space for pc-relative relocs that have become local due to symbol
1903 visibility changes. */
1904
1905 if (bfd_link_pic (info))
1906 {
1907 if (SYMBOL_CALLS_LOCAL (info, h))
1908 {
1909 struct elf_dyn_relocs **pp;
1910
1911 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1912 {
1913 p->count -= p->pc_count;
1914 p->pc_count = 0;
1915 if (p->count == 0)
1916 *pp = p->next;
1917 else
1918 pp = &p->next;
1919 }
1920 }
1921
1922 /* Also discard relocs on undefined weak syms with non-default
1923 visibility. */
1924 if (eh->dyn_relocs != NULL
1925 && h->root.type == bfd_link_hash_undefweak)
1926 {
1927 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1928 eh->dyn_relocs = NULL;
1929
1930 /* Make sure undefined weak symbols are output as a dynamic
1931 symbol in PIEs. */
1932 else if (h->dynindx == -1
1933 && !h->forced_local)
1934 {
1935 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1936 return FALSE;
1937 }
1938 }
1939 }
1940 else if (ELIMINATE_COPY_RELOCS)
1941 {
1942 /* For the non-shared case, discard space for relocs against
1943 symbols which turn out to need copy relocs or are not
1944 dynamic. */
1945
1946 if (!h->non_got_ref
1947 && ((h->def_dynamic
1948 && !h->def_regular)
1949 || (htab->elf.dynamic_sections_created
1950 && (h->root.type == bfd_link_hash_undefweak
1951 || h->root.type == bfd_link_hash_undefined))))
1952 {
1953 /* Make sure this symbol is output as a dynamic symbol.
1954 Undefined weak syms won't yet be marked as dynamic. */
1955 if (h->dynindx == -1
1956 && !h->forced_local)
1957 {
1958 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1959 return FALSE;
1960 }
1961
1962 /* If that succeeded, we know we'll be keeping all the
1963 relocs. */
1964 if (h->dynindx != -1)
1965 goto keep;
1966 }
1967
1968 eh->dyn_relocs = NULL;
1969
1970 keep: ;
1971 }
1972
1973 /* Finally, allocate space. */
1974 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1975 {
1976 asection *sreloc = elf_section_data (p->sec)->sreloc;
1977 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1978 }
1979
1980 return TRUE;
1981 }
1982
1983 /* Find any dynamic relocs that apply to read-only sections. */
1984
1985 static bfd_boolean
1986 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1987 {
1988 struct elf_s390_link_hash_entry *eh;
1989 struct elf_dyn_relocs *p;
1990
1991 eh = (struct elf_s390_link_hash_entry *) h;
1992 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1993 {
1994 asection *s = p->sec->output_section;
1995
1996 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1997 {
1998 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1999
2000 info->flags |= DF_TEXTREL;
2001
2002 /* Not an error, just cut short the traversal. */
2003 return FALSE;
2004 }
2005 }
2006 return TRUE;
2007 }
2008
2009 /* Set the sizes of the dynamic sections. */
2010
2011 static bfd_boolean
2012 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2013 struct bfd_link_info *info)
2014 {
2015 struct elf_s390_link_hash_table *htab;
2016 bfd *dynobj;
2017 asection *s;
2018 bfd_boolean relocs;
2019 bfd *ibfd;
2020
2021 htab = elf_s390_hash_table (info);
2022 if (htab == NULL)
2023 return FALSE;
2024
2025 dynobj = htab->elf.dynobj;
2026 if (dynobj == NULL)
2027 abort ();
2028
2029 if (htab->elf.dynamic_sections_created)
2030 {
2031 /* Set the contents of the .interp section to the interpreter. */
2032 if (bfd_link_executable (info) && !info->nointerp)
2033 {
2034 s = bfd_get_linker_section (dynobj, ".interp");
2035 if (s == NULL)
2036 abort ();
2037 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2038 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2039 }
2040 }
2041
2042 /* Set up .got offsets for local syms, and space for local dynamic
2043 relocs. */
2044 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2045 {
2046 bfd_signed_vma *local_got;
2047 bfd_signed_vma *end_local_got;
2048 char *local_tls_type;
2049 bfd_size_type locsymcount;
2050 Elf_Internal_Shdr *symtab_hdr;
2051 asection *srela;
2052 struct plt_entry *local_plt;
2053 unsigned int i;
2054
2055 if (! is_s390_elf (ibfd))
2056 continue;
2057
2058 for (s = ibfd->sections; s != NULL; s = s->next)
2059 {
2060 struct elf_dyn_relocs *p;
2061
2062 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2063 {
2064 if (!bfd_is_abs_section (p->sec)
2065 && bfd_is_abs_section (p->sec->output_section))
2066 {
2067 /* Input section has been discarded, either because
2068 it is a copy of a linkonce section or due to
2069 linker script /DISCARD/, so we'll be discarding
2070 the relocs too. */
2071 }
2072 else if (p->count != 0)
2073 {
2074 srela = elf_section_data (p->sec)->sreloc;
2075 srela->size += p->count * sizeof (Elf64_External_Rela);
2076 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2077 info->flags |= DF_TEXTREL;
2078 }
2079 }
2080 }
2081
2082 local_got = elf_local_got_refcounts (ibfd);
2083 if (!local_got)
2084 continue;
2085
2086 symtab_hdr = &elf_symtab_hdr (ibfd);
2087 locsymcount = symtab_hdr->sh_info;
2088 end_local_got = local_got + locsymcount;
2089 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2090 s = htab->elf.sgot;
2091 srela = htab->elf.srelgot;
2092 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2093 {
2094 if (*local_got > 0)
2095 {
2096 *local_got = s->size;
2097 s->size += GOT_ENTRY_SIZE;
2098 if (*local_tls_type == GOT_TLS_GD)
2099 s->size += GOT_ENTRY_SIZE;
2100 if (bfd_link_pic (info))
2101 srela->size += sizeof (Elf64_External_Rela);
2102 }
2103 else
2104 *local_got = (bfd_vma) -1;
2105 }
2106
2107 local_plt = elf_s390_local_plt (ibfd);
2108 for (i = 0; i < symtab_hdr->sh_info; i++)
2109 {
2110 if (local_plt[i].plt.refcount > 0)
2111 {
2112 local_plt[i].plt.offset = htab->elf.iplt->size;
2113 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2114 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2115 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2116 }
2117 else
2118 local_plt[i].plt.offset = (bfd_vma) -1;
2119 }
2120 }
2121
2122 if (htab->tls_ldm_got.refcount > 0)
2123 {
2124 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2125 relocs. */
2126 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2127 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2128 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2129 }
2130 else
2131 htab->tls_ldm_got.offset = -1;
2132
2133 /* Allocate global sym .plt and .got entries, and space for global
2134 sym dynamic relocs. */
2135 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2136
2137 /* We now have determined the sizes of the various dynamic sections.
2138 Allocate memory for them. */
2139 relocs = FALSE;
2140 for (s = dynobj->sections; s != NULL; s = s->next)
2141 {
2142 if ((s->flags & SEC_LINKER_CREATED) == 0)
2143 continue;
2144
2145 if (s == htab->elf.splt
2146 || s == htab->elf.sgot
2147 || s == htab->elf.sgotplt
2148 || s == htab->sdynbss
2149 || s == htab->elf.iplt
2150 || s == htab->elf.igotplt
2151 || s == htab->irelifunc)
2152 {
2153 /* Strip this section if we don't need it; see the
2154 comment below. */
2155 }
2156 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2157 {
2158 if (s->size != 0 && s != htab->elf.srelplt)
2159 relocs = TRUE;
2160
2161 /* We use the reloc_count field as a counter if we need
2162 to copy relocs into the output file. */
2163 s->reloc_count = 0;
2164 }
2165 else
2166 {
2167 /* It's not one of our sections, so don't allocate space. */
2168 continue;
2169 }
2170
2171 if (s->size == 0)
2172 {
2173 /* If we don't need this section, strip it from the
2174 output file. This is to handle .rela.bss and
2175 .rela.plt. We must create it in
2176 create_dynamic_sections, because it must be created
2177 before the linker maps input sections to output
2178 sections. The linker does that before
2179 adjust_dynamic_symbol is called, and it is that
2180 function which decides whether anything needs to go
2181 into these sections. */
2182
2183 s->flags |= SEC_EXCLUDE;
2184 continue;
2185 }
2186
2187 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2188 continue;
2189
2190 /* Allocate memory for the section contents. We use bfd_zalloc
2191 here in case unused entries are not reclaimed before the
2192 section's contents are written out. This should not happen,
2193 but this way if it does, we get a R_390_NONE reloc instead
2194 of garbage. */
2195 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2196 if (s->contents == NULL)
2197 return FALSE;
2198 }
2199
2200 if (htab->elf.dynamic_sections_created)
2201 {
2202 /* Add some entries to the .dynamic section. We fill in the
2203 values later, in elf_s390_finish_dynamic_sections, but we
2204 must add the entries now so that we get the correct size for
2205 the .dynamic section. The DT_DEBUG entry is filled in by the
2206 dynamic linker and used by the debugger. */
2207 #define add_dynamic_entry(TAG, VAL) \
2208 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2209
2210 if (bfd_link_executable (info))
2211 {
2212 if (!add_dynamic_entry (DT_DEBUG, 0))
2213 return FALSE;
2214 }
2215
2216 if (htab->elf.splt->size != 0)
2217 {
2218 if (!add_dynamic_entry (DT_PLTGOT, 0)
2219 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2220 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2221 || !add_dynamic_entry (DT_JMPREL, 0))
2222 return FALSE;
2223 }
2224
2225 if (relocs)
2226 {
2227 if (!add_dynamic_entry (DT_RELA, 0)
2228 || !add_dynamic_entry (DT_RELASZ, 0)
2229 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2230 return FALSE;
2231
2232 /* If any dynamic relocs apply to a read-only section,
2233 then we need a DT_TEXTREL entry. */
2234 if ((info->flags & DF_TEXTREL) == 0)
2235 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2236 info);
2237
2238 if ((info->flags & DF_TEXTREL) != 0)
2239 {
2240 if (!add_dynamic_entry (DT_TEXTREL, 0))
2241 return FALSE;
2242 }
2243 }
2244 }
2245 #undef add_dynamic_entry
2246
2247 return TRUE;
2248 }
2249
2250 /* Return the base VMA address which should be subtracted from real addresses
2251 when resolving @dtpoff relocation.
2252 This is PT_TLS segment p_vaddr. */
2253
2254 static bfd_vma
2255 dtpoff_base (struct bfd_link_info *info)
2256 {
2257 /* If tls_sec is NULL, we should have signalled an error already. */
2258 if (elf_hash_table (info)->tls_sec == NULL)
2259 return 0;
2260 return elf_hash_table (info)->tls_sec->vma;
2261 }
2262
2263 /* Return the relocation value for @tpoff relocation
2264 if STT_TLS virtual address is ADDRESS. */
2265
2266 static bfd_vma
2267 tpoff (struct bfd_link_info *info, bfd_vma address)
2268 {
2269 struct elf_link_hash_table *htab = elf_hash_table (info);
2270
2271 /* If tls_sec is NULL, we should have signalled an error already. */
2272 if (htab->tls_sec == NULL)
2273 return 0;
2274 return htab->tls_size + htab->tls_sec->vma - address;
2275 }
2276
2277 /* Complain if TLS instruction relocation is against an invalid
2278 instruction. */
2279
2280 static void
2281 invalid_tls_insn (bfd *input_bfd,
2282 asection *input_section,
2283 Elf_Internal_Rela *rel)
2284 {
2285 reloc_howto_type *howto;
2286
2287 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2288 (*_bfd_error_handler)
2289 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2290 input_bfd,
2291 input_section,
2292 (long) rel->r_offset,
2293 howto->name);
2294 bfd_set_error (bfd_error_bad_value);
2295 }
2296
2297 /* Relocate a 390 ELF section. */
2298
2299 static bfd_boolean
2300 elf_s390_relocate_section (bfd *output_bfd,
2301 struct bfd_link_info *info,
2302 bfd *input_bfd,
2303 asection *input_section,
2304 bfd_byte *contents,
2305 Elf_Internal_Rela *relocs,
2306 Elf_Internal_Sym *local_syms,
2307 asection **local_sections)
2308 {
2309 struct elf_s390_link_hash_table *htab;
2310 Elf_Internal_Shdr *symtab_hdr;
2311 struct elf_link_hash_entry **sym_hashes;
2312 bfd_vma *local_got_offsets;
2313 Elf_Internal_Rela *rel;
2314 Elf_Internal_Rela *relend;
2315
2316 BFD_ASSERT (is_s390_elf (input_bfd));
2317
2318 htab = elf_s390_hash_table (info);
2319 if (htab == NULL)
2320 return FALSE;
2321
2322 symtab_hdr = &elf_symtab_hdr (input_bfd);
2323 sym_hashes = elf_sym_hashes (input_bfd);
2324 local_got_offsets = elf_local_got_offsets (input_bfd);
2325
2326 rel = relocs;
2327 relend = relocs + input_section->reloc_count;
2328 for (; rel < relend; rel++)
2329 {
2330 unsigned int r_type;
2331 reloc_howto_type *howto;
2332 unsigned long r_symndx;
2333 struct elf_link_hash_entry *h;
2334 Elf_Internal_Sym *sym;
2335 asection *sec;
2336 bfd_vma off;
2337 bfd_vma relocation;
2338 bfd_boolean unresolved_reloc;
2339 bfd_reloc_status_type r;
2340 int tls_type;
2341 asection *base_got = htab->elf.sgot;
2342
2343 r_type = ELF64_R_TYPE (rel->r_info);
2344 if (r_type == (int) R_390_GNU_VTINHERIT
2345 || r_type == (int) R_390_GNU_VTENTRY)
2346 continue;
2347 if (r_type >= (int) R_390_max)
2348 {
2349 bfd_set_error (bfd_error_bad_value);
2350 return FALSE;
2351 }
2352
2353 howto = elf_howto_table + r_type;
2354 r_symndx = ELF64_R_SYM (rel->r_info);
2355
2356 h = NULL;
2357 sym = NULL;
2358 sec = NULL;
2359 unresolved_reloc = FALSE;
2360 if (r_symndx < symtab_hdr->sh_info)
2361 {
2362 sym = local_syms + r_symndx;
2363 sec = local_sections[r_symndx];
2364
2365 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2366 {
2367 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2368 if (local_plt == NULL)
2369 return FALSE;
2370
2371 /* Address of the PLT slot. */
2372 relocation = (htab->elf.iplt->output_section->vma
2373 + htab->elf.iplt->output_offset
2374 + local_plt[r_symndx].plt.offset);
2375
2376 switch (r_type)
2377 {
2378 case R_390_PLTOFF16:
2379 case R_390_PLTOFF32:
2380 case R_390_PLTOFF64:
2381 relocation -= htab->elf.sgot->output_section->vma;
2382 break;
2383 case R_390_GOTPLT12:
2384 case R_390_GOTPLT16:
2385 case R_390_GOTPLT20:
2386 case R_390_GOTPLT32:
2387 case R_390_GOTPLT64:
2388 case R_390_GOTPLTENT:
2389 case R_390_GOT12:
2390 case R_390_GOT16:
2391 case R_390_GOT20:
2392 case R_390_GOT32:
2393 case R_390_GOT64:
2394 case R_390_GOTENT:
2395 {
2396 /* Write the PLT slot address into the GOT slot. */
2397 bfd_put_64 (output_bfd, relocation,
2398 htab->elf.sgot->contents +
2399 local_got_offsets[r_symndx]);
2400 relocation = (local_got_offsets[r_symndx] +
2401 htab->elf.sgot->output_offset);
2402
2403 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2404 relocation += htab->elf.sgot->output_section->vma;
2405 break;
2406 }
2407 default:
2408 break;
2409 }
2410 /* The output section is needed later in
2411 finish_dynamic_section when creating the dynamic
2412 relocation. */
2413 local_plt[r_symndx].sec = sec;
2414 goto do_relocation;
2415 }
2416 else
2417 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2418 }
2419 else
2420 {
2421 bfd_boolean warned ATTRIBUTE_UNUSED;
2422 bfd_boolean ignored ATTRIBUTE_UNUSED;
2423
2424 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2425 r_symndx, symtab_hdr, sym_hashes,
2426 h, sec, relocation,
2427 unresolved_reloc, warned, ignored);
2428 }
2429
2430 if (sec != NULL && discarded_section (sec))
2431 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2432 rel, 1, relend, howto, 0, contents);
2433
2434 if (bfd_link_relocatable (info))
2435 continue;
2436
2437 switch (r_type)
2438 {
2439 case R_390_GOTPLT12:
2440 case R_390_GOTPLT16:
2441 case R_390_GOTPLT20:
2442 case R_390_GOTPLT32:
2443 case R_390_GOTPLT64:
2444 case R_390_GOTPLTENT:
2445 /* There are three cases for a GOTPLT relocation. 1) The
2446 relocation is against the jump slot entry of a plt that
2447 will get emitted to the output file. 2) The relocation
2448 is against the jump slot of a plt entry that has been
2449 removed. elf_s390_adjust_gotplt has created a GOT entry
2450 as replacement. 3) The relocation is against a local symbol.
2451 Cases 2) and 3) are the same as the GOT relocation code
2452 so we just have to test for case 1 and fall through for
2453 the other two. */
2454 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2455 {
2456 bfd_vma plt_index;
2457
2458 if (s390_is_ifunc_symbol_p (h))
2459 {
2460 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2461 relocation = (plt_index * GOT_ENTRY_SIZE +
2462 htab->elf.igotplt->output_offset);
2463 if (r_type == R_390_GOTPLTENT)
2464 relocation += htab->elf.igotplt->output_section->vma;
2465 }
2466 else
2467 {
2468 /* Calc. index no.
2469 Current offset - size first entry / entry size. */
2470 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2471 PLT_ENTRY_SIZE;
2472
2473 /* Offset in GOT is PLT index plus GOT headers(3)
2474 times 4, addr & GOT addr. */
2475 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2476 if (r_type == R_390_GOTPLTENT)
2477 relocation += htab->elf.sgot->output_section->vma;
2478 }
2479 unresolved_reloc = FALSE;
2480 break;
2481 }
2482 /* Fall through. */
2483
2484 case R_390_GOT12:
2485 case R_390_GOT16:
2486 case R_390_GOT20:
2487 case R_390_GOT32:
2488 case R_390_GOT64:
2489 case R_390_GOTENT:
2490 /* Relocation is to the entry for this symbol in the global
2491 offset table. */
2492 if (base_got == NULL)
2493 abort ();
2494
2495 if (h != NULL)
2496 {
2497 bfd_boolean dyn;
2498
2499 off = h->got.offset;
2500 dyn = htab->elf.dynamic_sections_created;
2501
2502 if (s390_is_ifunc_symbol_p (h))
2503 {
2504 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2505 if (off == (bfd_vma)-1)
2506 {
2507 /* No explicit GOT usage so redirect to the
2508 got.iplt slot. */
2509 base_got = htab->elf.igotplt;
2510 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2511 }
2512 else
2513 {
2514 /* Explicit GOT slots must contain the address
2515 of the PLT slot. This will be handled in
2516 finish_dynamic_symbol. */
2517 }
2518 }
2519 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2520 bfd_link_pic (info),
2521 h)
2522 || (bfd_link_pic (info)
2523 && SYMBOL_REFERENCES_LOCAL (info, h))
2524 || (ELF_ST_VISIBILITY (h->other)
2525 && h->root.type == bfd_link_hash_undefweak))
2526 {
2527 /* This is actually a static link, or it is a
2528 -Bsymbolic link and the symbol is defined
2529 locally, or the symbol was forced to be local
2530 because of a version file. We must initialize
2531 this entry in the global offset table. Since the
2532 offset must always be a multiple of 2, we use the
2533 least significant bit to record whether we have
2534 initialized it already.
2535
2536 When doing a dynamic link, we create a .rel.got
2537 relocation entry to initialize the value. This
2538 is done in the finish_dynamic_symbol routine. */
2539 if ((off & 1) != 0)
2540 off &= ~1;
2541 else
2542 {
2543 bfd_put_64 (output_bfd, relocation,
2544 base_got->contents + off);
2545 h->got.offset |= 1;
2546 }
2547
2548 if ((h->def_regular
2549 && bfd_link_pic (info)
2550 && SYMBOL_REFERENCES_LOCAL (info, h))
2551 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2552 && ((r_type == R_390_GOTENT
2553 && (bfd_get_16 (input_bfd,
2554 contents + rel->r_offset - 2)
2555 & 0xff0f) == 0xc408)
2556 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2557 || (r_type == R_390_GOT20
2558 && (bfd_get_32 (input_bfd,
2559 contents + rel->r_offset - 2)
2560 & 0xff00f000) == 0xe300c000
2561 && bfd_get_8 (input_bfd,
2562 contents + rel->r_offset + 3) == 0x04)))
2563
2564 {
2565 unsigned short new_insn =
2566 (0xc000 | (bfd_get_8 (input_bfd,
2567 contents + rel->r_offset - 1) & 0xf0));
2568 bfd_put_16 (output_bfd, new_insn,
2569 contents + rel->r_offset - 2);
2570 r_type = R_390_PC32DBL;
2571 rel->r_addend = 2;
2572 howto = elf_howto_table + r_type;
2573 relocation = h->root.u.def.value
2574 + h->root.u.def.section->output_section->vma
2575 + h->root.u.def.section->output_offset;
2576 goto do_relocation;
2577 }
2578 }
2579 else
2580 unresolved_reloc = FALSE;
2581 }
2582 else
2583 {
2584 if (local_got_offsets == NULL)
2585 abort ();
2586
2587 off = local_got_offsets[r_symndx];
2588
2589 /* The offset must always be a multiple of 8. We use
2590 the least significant bit to record whether we have
2591 already generated the necessary reloc. */
2592 if ((off & 1) != 0)
2593 off &= ~1;
2594 else
2595 {
2596 bfd_put_64 (output_bfd, relocation,
2597 htab->elf.sgot->contents + off);
2598
2599 if (bfd_link_pic (info))
2600 {
2601 asection *s;
2602 Elf_Internal_Rela outrel;
2603 bfd_byte *loc;
2604
2605 s = htab->elf.srelgot;
2606 if (s == NULL)
2607 abort ();
2608
2609 outrel.r_offset = (htab->elf.sgot->output_section->vma
2610 + htab->elf.sgot->output_offset
2611 + off);
2612 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2613 outrel.r_addend = relocation;
2614 loc = s->contents;
2615 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2616 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2617 }
2618
2619 local_got_offsets[r_symndx] |= 1;
2620 }
2621 }
2622
2623 if (off >= (bfd_vma) -2)
2624 abort ();
2625
2626 relocation = base_got->output_offset + off;
2627
2628 /* For @GOTENT the relocation is against the offset between
2629 the instruction and the symbols entry in the GOT and not
2630 between the start of the GOT and the symbols entry. We
2631 add the vma of the GOT to get the correct value. */
2632 if ( r_type == R_390_GOTENT
2633 || r_type == R_390_GOTPLTENT)
2634 relocation += base_got->output_section->vma;
2635
2636 break;
2637
2638 case R_390_GOTOFF16:
2639 case R_390_GOTOFF32:
2640 case R_390_GOTOFF64:
2641 /* Relocation is relative to the start of the global offset
2642 table. */
2643
2644 /* Note that sgot->output_offset is not involved in this
2645 calculation. We always want the start of .got. If we
2646 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2647 permitted by the ABI, we might have to change this
2648 calculation. */
2649 relocation -= htab->elf.sgot->output_section->vma;
2650 break;
2651
2652 case R_390_GOTPC:
2653 case R_390_GOTPCDBL:
2654 /* Use global offset table as symbol value. */
2655 relocation = htab->elf.sgot->output_section->vma;
2656 unresolved_reloc = FALSE;
2657 break;
2658
2659 case R_390_PLT12DBL:
2660 case R_390_PLT16DBL:
2661 case R_390_PLT24DBL:
2662 case R_390_PLT32:
2663 case R_390_PLT32DBL:
2664 case R_390_PLT64:
2665 /* Relocation is to the entry for this symbol in the
2666 procedure linkage table. */
2667
2668 /* Resolve a PLT32 reloc against a local symbol directly,
2669 without using the procedure linkage table. */
2670 if (h == NULL)
2671 break;
2672
2673 if (h->plt.offset == (bfd_vma) -1
2674 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2675 {
2676 /* We didn't make a PLT entry for this symbol. This
2677 happens when statically linking PIC code, or when
2678 using -Bsymbolic. */
2679 break;
2680 }
2681 if (s390_is_ifunc_symbol_p (h))
2682 relocation = (htab->elf.iplt->output_section->vma
2683 + htab->elf.iplt->output_offset
2684 + h->plt.offset);
2685 else
2686 relocation = (htab->elf.splt->output_section->vma
2687 + htab->elf.splt->output_offset
2688 + h->plt.offset);
2689 unresolved_reloc = FALSE;
2690 break;
2691
2692 case R_390_PLTOFF16:
2693 case R_390_PLTOFF32:
2694 case R_390_PLTOFF64:
2695 /* Relocation is to the entry for this symbol in the
2696 procedure linkage table relative to the start of the GOT. */
2697
2698 /* For local symbols or if we didn't make a PLT entry for
2699 this symbol resolve the symbol directly. */
2700 if (h == NULL
2701 || h->plt.offset == (bfd_vma) -1
2702 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2703 {
2704 relocation -= htab->elf.sgot->output_section->vma;
2705 break;
2706 }
2707
2708 if (s390_is_ifunc_symbol_p (h))
2709 relocation = (htab->elf.iplt->output_section->vma
2710 + htab->elf.iplt->output_offset
2711 + h->plt.offset
2712 - htab->elf.sgot->output_section->vma);
2713 else
2714 relocation = (htab->elf.splt->output_section->vma
2715 + htab->elf.splt->output_offset
2716 + h->plt.offset
2717 - htab->elf.sgot->output_section->vma);
2718 unresolved_reloc = FALSE;
2719 break;
2720
2721 case R_390_8:
2722 case R_390_16:
2723 case R_390_32:
2724 case R_390_64:
2725 case R_390_PC16:
2726 case R_390_PC12DBL:
2727 case R_390_PC16DBL:
2728 case R_390_PC24DBL:
2729 case R_390_PC32:
2730 case R_390_PC32DBL:
2731 case R_390_PC64:
2732
2733 if (h != NULL
2734 && s390_is_ifunc_symbol_p (h)
2735 && h->def_regular)
2736 {
2737 if (!bfd_link_pic (info) || !h->non_got_ref)
2738 {
2739 /* For a non-shared object STT_GNU_IFUNC symbol must
2740 go through PLT. */
2741 relocation = (htab->elf.iplt->output_section->vma
2742 + htab->elf.iplt->output_offset
2743 + h ->plt.offset);
2744 goto do_relocation;
2745 }
2746 else
2747 {
2748 /* For shared objects a runtime relocation is needed. */
2749
2750 Elf_Internal_Rela outrel;
2751 asection *sreloc;
2752
2753 /* Need a dynamic relocation to get the real function
2754 address. */
2755 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2756 info,
2757 input_section,
2758 rel->r_offset);
2759 if (outrel.r_offset == (bfd_vma) -1
2760 || outrel.r_offset == (bfd_vma) -2)
2761 abort ();
2762
2763 outrel.r_offset += (input_section->output_section->vma
2764 + input_section->output_offset);
2765
2766 if (h->dynindx == -1
2767 || h->forced_local
2768 || bfd_link_executable (info))
2769 {
2770 /* This symbol is resolved locally. */
2771 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2772 outrel.r_addend = (h->root.u.def.value
2773 + h->root.u.def.section->output_section->vma
2774 + h->root.u.def.section->output_offset);
2775 }
2776 else
2777 {
2778 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2779 outrel.r_addend = 0;
2780 }
2781
2782 sreloc = htab->elf.irelifunc;
2783 elf_append_rela (output_bfd, sreloc, &outrel);
2784
2785 /* If this reloc is against an external symbol, we
2786 do not want to fiddle with the addend. Otherwise,
2787 we need to include the symbol value so that it
2788 becomes an addend for the dynamic reloc. For an
2789 internal symbol, we have updated addend. */
2790 continue;
2791 }
2792 }
2793
2794 if ((input_section->flags & SEC_ALLOC) == 0)
2795 break;
2796
2797 if ((bfd_link_pic (info)
2798 && (h == NULL
2799 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2800 || h->root.type != bfd_link_hash_undefweak)
2801 && ((r_type != R_390_PC16
2802 && r_type != R_390_PC12DBL
2803 && r_type != R_390_PC16DBL
2804 && r_type != R_390_PC24DBL
2805 && r_type != R_390_PC32
2806 && r_type != R_390_PC32DBL
2807 && r_type != R_390_PC64)
2808 || !SYMBOL_CALLS_LOCAL (info, h)))
2809 || (ELIMINATE_COPY_RELOCS
2810 && !bfd_link_pic (info)
2811 && h != NULL
2812 && h->dynindx != -1
2813 && !h->non_got_ref
2814 && ((h->def_dynamic
2815 && !h->def_regular)
2816 || h->root.type == bfd_link_hash_undefweak
2817 || h->root.type == bfd_link_hash_undefined)))
2818 {
2819 Elf_Internal_Rela outrel;
2820 bfd_boolean skip, relocate;
2821 asection *sreloc;
2822 bfd_byte *loc;
2823
2824 /* When generating a shared object, these relocations
2825 are copied into the output file to be resolved at run
2826 time. */
2827 skip = FALSE;
2828 relocate = FALSE;
2829
2830 outrel.r_offset =
2831 _bfd_elf_section_offset (output_bfd, info, input_section,
2832 rel->r_offset);
2833 if (outrel.r_offset == (bfd_vma) -1)
2834 skip = TRUE;
2835 else if (outrel.r_offset == (bfd_vma) -2)
2836 skip = TRUE, relocate = TRUE;
2837
2838 outrel.r_offset += (input_section->output_section->vma
2839 + input_section->output_offset);
2840
2841 if (skip)
2842 memset (&outrel, 0, sizeof outrel);
2843 else if (h != NULL
2844 && h->dynindx != -1
2845 && (r_type == R_390_PC16
2846 || r_type == R_390_PC12DBL
2847 || r_type == R_390_PC16DBL
2848 || r_type == R_390_PC24DBL
2849 || r_type == R_390_PC32
2850 || r_type == R_390_PC32DBL
2851 || r_type == R_390_PC64
2852 || !bfd_link_pic (info)
2853 || !SYMBOLIC_BIND (info, h)
2854 || !h->def_regular))
2855 {
2856 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2857 outrel.r_addend = rel->r_addend;
2858 }
2859 else
2860 {
2861 /* This symbol is local, or marked to become local. */
2862 outrel.r_addend = relocation + rel->r_addend;
2863 if (r_type == R_390_64)
2864 {
2865 relocate = TRUE;
2866 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2867 }
2868 else
2869 {
2870 long sindx;
2871
2872 if (bfd_is_abs_section (sec))
2873 sindx = 0;
2874 else if (sec == NULL || sec->owner == NULL)
2875 {
2876 bfd_set_error(bfd_error_bad_value);
2877 return FALSE;
2878 }
2879 else
2880 {
2881 asection *osec;
2882
2883 osec = sec->output_section;
2884 sindx = elf_section_data (osec)->dynindx;
2885
2886 if (sindx == 0)
2887 {
2888 osec = htab->elf.text_index_section;
2889 sindx = elf_section_data (osec)->dynindx;
2890 }
2891 BFD_ASSERT (sindx != 0);
2892
2893 /* We are turning this relocation into one
2894 against a section symbol, so subtract out
2895 the output section's address but not the
2896 offset of the input section in the output
2897 section. */
2898 outrel.r_addend -= osec->vma;
2899 }
2900 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2901 }
2902 }
2903
2904 sreloc = elf_section_data (input_section)->sreloc;
2905 if (sreloc == NULL)
2906 abort ();
2907
2908 loc = sreloc->contents;
2909 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2910 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2911
2912 /* If this reloc is against an external symbol, we do
2913 not want to fiddle with the addend. Otherwise, we
2914 need to include the symbol value so that it becomes
2915 an addend for the dynamic reloc. */
2916 if (! relocate)
2917 continue;
2918 }
2919
2920 break;
2921
2922 /* Relocations for tls literal pool entries. */
2923 case R_390_TLS_IE64:
2924 if (bfd_link_pic (info))
2925 {
2926 Elf_Internal_Rela outrel;
2927 asection *sreloc;
2928 bfd_byte *loc;
2929
2930 outrel.r_offset = rel->r_offset
2931 + input_section->output_section->vma
2932 + input_section->output_offset;
2933 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2934 sreloc = elf_section_data (input_section)->sreloc;
2935 if (sreloc == NULL)
2936 abort ();
2937 loc = sreloc->contents;
2938 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2939 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2940 }
2941 /* Fall through. */
2942
2943 case R_390_TLS_GD64:
2944 case R_390_TLS_GOTIE64:
2945 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2946 tls_type = GOT_UNKNOWN;
2947 if (h == NULL && local_got_offsets)
2948 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2949 else if (h != NULL)
2950 {
2951 tls_type = elf_s390_hash_entry(h)->tls_type;
2952 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2953 r_type = R_390_TLS_LE64;
2954 }
2955 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2956 r_type = R_390_TLS_IE64;
2957
2958 if (r_type == R_390_TLS_LE64)
2959 {
2960 /* This relocation gets optimized away by the local exec
2961 access optimization. */
2962 BFD_ASSERT (! unresolved_reloc);
2963 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2964 contents + rel->r_offset);
2965 continue;
2966 }
2967
2968 if (htab->elf.sgot == NULL)
2969 abort ();
2970
2971 if (h != NULL)
2972 off = h->got.offset;
2973 else
2974 {
2975 if (local_got_offsets == NULL)
2976 abort ();
2977
2978 off = local_got_offsets[r_symndx];
2979 }
2980
2981 emit_tls_relocs:
2982
2983 if ((off & 1) != 0)
2984 off &= ~1;
2985 else
2986 {
2987 Elf_Internal_Rela outrel;
2988 bfd_byte *loc;
2989 int dr_type, indx;
2990
2991 if (htab->elf.srelgot == NULL)
2992 abort ();
2993
2994 outrel.r_offset = (htab->elf.sgot->output_section->vma
2995 + htab->elf.sgot->output_offset + off);
2996
2997 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2998 if (r_type == R_390_TLS_GD64)
2999 dr_type = R_390_TLS_DTPMOD;
3000 else
3001 dr_type = R_390_TLS_TPOFF;
3002 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3003 outrel.r_addend = relocation - dtpoff_base (info);
3004 else
3005 outrel.r_addend = 0;
3006 outrel.r_info = ELF64_R_INFO (indx, dr_type);
3007 loc = htab->elf.srelgot->contents;
3008 loc += htab->elf.srelgot->reloc_count++
3009 * sizeof (Elf64_External_Rela);
3010 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3011
3012 if (r_type == R_390_TLS_GD64)
3013 {
3014 if (indx == 0)
3015 {
3016 BFD_ASSERT (! unresolved_reloc);
3017 bfd_put_64 (output_bfd,
3018 relocation - dtpoff_base (info),
3019 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3020 }
3021 else
3022 {
3023 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
3024 outrel.r_offset += GOT_ENTRY_SIZE;
3025 outrel.r_addend = 0;
3026 htab->elf.srelgot->reloc_count++;
3027 loc += sizeof (Elf64_External_Rela);
3028 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3029 }
3030 }
3031
3032 if (h != NULL)
3033 h->got.offset |= 1;
3034 else
3035 local_got_offsets[r_symndx] |= 1;
3036 }
3037
3038 if (off >= (bfd_vma) -2)
3039 abort ();
3040 if (r_type == ELF64_R_TYPE (rel->r_info))
3041 {
3042 relocation = htab->elf.sgot->output_offset + off;
3043 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3044 relocation += htab->elf.sgot->output_section->vma;
3045 unresolved_reloc = FALSE;
3046 }
3047 else
3048 {
3049 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3050 contents + rel->r_offset);
3051 continue;
3052 }
3053 break;
3054
3055 case R_390_TLS_GOTIE12:
3056 case R_390_TLS_GOTIE20:
3057 case R_390_TLS_IEENT:
3058 if (h == NULL)
3059 {
3060 if (local_got_offsets == NULL)
3061 abort();
3062 off = local_got_offsets[r_symndx];
3063 if (bfd_link_pic (info))
3064 goto emit_tls_relocs;
3065 }
3066 else
3067 {
3068 off = h->got.offset;
3069 tls_type = elf_s390_hash_entry(h)->tls_type;
3070 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3071 goto emit_tls_relocs;
3072 }
3073
3074 if (htab->elf.sgot == NULL)
3075 abort ();
3076
3077 BFD_ASSERT (! unresolved_reloc);
3078 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3079 htab->elf.sgot->contents + off);
3080 relocation = htab->elf.sgot->output_offset + off;
3081 if (r_type == R_390_TLS_IEENT)
3082 relocation += htab->elf.sgot->output_section->vma;
3083 unresolved_reloc = FALSE;
3084 break;
3085
3086 case R_390_TLS_LDM64:
3087 if (! bfd_link_pic (info))
3088 /* The literal pool entry this relocation refers to gets ignored
3089 by the optimized code of the local exec model. Do nothing
3090 and the value will turn out zero. */
3091 continue;
3092
3093 if (htab->elf.sgot == NULL)
3094 abort ();
3095
3096 off = htab->tls_ldm_got.offset;
3097 if (off & 1)
3098 off &= ~1;
3099 else
3100 {
3101 Elf_Internal_Rela outrel;
3102 bfd_byte *loc;
3103
3104 if (htab->elf.srelgot == NULL)
3105 abort ();
3106
3107 outrel.r_offset = (htab->elf.sgot->output_section->vma
3108 + htab->elf.sgot->output_offset + off);
3109
3110 bfd_put_64 (output_bfd, 0,
3111 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3112 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3113 outrel.r_addend = 0;
3114 loc = htab->elf.srelgot->contents;
3115 loc += htab->elf.srelgot->reloc_count++
3116 * sizeof (Elf64_External_Rela);
3117 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3118 htab->tls_ldm_got.offset |= 1;
3119 }
3120 relocation = htab->elf.sgot->output_offset + off;
3121 unresolved_reloc = FALSE;
3122 break;
3123
3124 case R_390_TLS_LE64:
3125 if (bfd_link_dll (info))
3126 {
3127 /* Linking a shared library with non-fpic code requires
3128 a R_390_TLS_TPOFF relocation. */
3129 Elf_Internal_Rela outrel;
3130 asection *sreloc;
3131 bfd_byte *loc;
3132 int indx;
3133
3134 outrel.r_offset = rel->r_offset
3135 + input_section->output_section->vma
3136 + input_section->output_offset;
3137 if (h != NULL && h->dynindx != -1)
3138 indx = h->dynindx;
3139 else
3140 indx = 0;
3141 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3142 if (indx == 0)
3143 outrel.r_addend = relocation - dtpoff_base (info);
3144 else
3145 outrel.r_addend = 0;
3146 sreloc = elf_section_data (input_section)->sreloc;
3147 if (sreloc == NULL)
3148 abort ();
3149 loc = sreloc->contents;
3150 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3151 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3152 }
3153 else
3154 {
3155 BFD_ASSERT (! unresolved_reloc);
3156 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3157 contents + rel->r_offset);
3158 }
3159 continue;
3160
3161 case R_390_TLS_LDO64:
3162 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3163 relocation -= dtpoff_base (info);
3164 else
3165 /* When converting LDO to LE, we must negate. */
3166 relocation = -tpoff (info, relocation);
3167 break;
3168
3169 /* Relocations for tls instructions. */
3170 case R_390_TLS_LOAD:
3171 case R_390_TLS_GDCALL:
3172 case R_390_TLS_LDCALL:
3173 tls_type = GOT_UNKNOWN;
3174 if (h == NULL && local_got_offsets)
3175 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3176 else if (h != NULL)
3177 tls_type = elf_s390_hash_entry(h)->tls_type;
3178
3179 if (tls_type == GOT_TLS_GD)
3180 continue;
3181
3182 if (r_type == R_390_TLS_LOAD)
3183 {
3184 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3185 {
3186 /* IE->LE transition. Four valid cases:
3187 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3188 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3189 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3190 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3191 unsigned int insn0, insn1, ry;
3192
3193 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3194 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3195 if (insn1 != 0x0004)
3196 invalid_tls_insn (input_bfd, input_section, rel);
3197 ry = 0;
3198 if ((insn0 & 0xff00f000) == 0xe3000000)
3199 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3200 ry = (insn0 & 0x000f0000);
3201 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3202 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3203 ry = (insn0 & 0x0000f000) << 4;
3204 else if ((insn0 & 0xff00f000) == 0xe300c000)
3205 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3206 ry = (insn0 & 0x000f0000);
3207 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3208 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3209 ry = (insn0 & 0x0000f000) << 4;
3210 else
3211 invalid_tls_insn (input_bfd, input_section, rel);
3212 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3213 insn1 = 0x000d;
3214 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3215 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3216 }
3217 }
3218 else if (r_type == R_390_TLS_GDCALL)
3219 {
3220 unsigned int insn0, insn1;
3221
3222 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3223 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3224 if ((insn0 & 0xffff0000) != 0xc0e50000)
3225 invalid_tls_insn (input_bfd, input_section, rel);
3226 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3227 {
3228 /* GD->LE transition.
3229 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3230 insn0 = 0xc0040000;
3231 insn1 = 0x0000;
3232 }
3233 else
3234 {
3235 /* GD->IE transition.
3236 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3237 insn0 = 0xe322c000;
3238 insn1 = 0x0004;
3239 }
3240 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3241 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3242 }
3243 else if (r_type == R_390_TLS_LDCALL)
3244 {
3245 if (!bfd_link_pic (info))
3246 {
3247 unsigned int insn0, insn1;
3248
3249 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3250 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3251 if ((insn0 & 0xffff0000) != 0xc0e50000)
3252 invalid_tls_insn (input_bfd, input_section, rel);
3253 /* LD->LE transition.
3254 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3255 insn0 = 0xc0040000;
3256 insn1 = 0x0000;
3257 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3258 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3259 }
3260 }
3261 continue;
3262
3263 default:
3264 break;
3265 }
3266
3267 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3268 because such sections are not SEC_ALLOC and thus ld.so will
3269 not process them. */
3270 if (unresolved_reloc
3271 && !((input_section->flags & SEC_DEBUGGING) != 0
3272 && h->def_dynamic)
3273 && _bfd_elf_section_offset (output_bfd, info, input_section,
3274 rel->r_offset) != (bfd_vma) -1)
3275 (*_bfd_error_handler)
3276 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3277 input_bfd,
3278 input_section,
3279 (long) rel->r_offset,
3280 howto->name,
3281 h->root.root.string);
3282
3283 do_relocation:
3284
3285 /* When applying a 24 bit reloc we need to start one byte
3286 earlier. Otherwise the 32 bit get/put bfd operations might
3287 access a byte after the actual section. */
3288 if (r_type == R_390_PC24DBL
3289 || r_type == R_390_PLT24DBL)
3290 rel->r_offset--;
3291
3292 if (r_type == R_390_20
3293 || r_type == R_390_GOT20
3294 || r_type == R_390_GOTPLT20
3295 || r_type == R_390_TLS_GOTIE20)
3296 {
3297 relocation += rel->r_addend;
3298 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3299 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3300 contents, rel->r_offset,
3301 relocation, 0);
3302 }
3303 else
3304 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3305 contents, rel->r_offset,
3306 relocation, rel->r_addend);
3307
3308 if (r != bfd_reloc_ok)
3309 {
3310 const char *name;
3311
3312 if (h != NULL)
3313 name = h->root.root.string;
3314 else
3315 {
3316 name = bfd_elf_string_from_elf_section (input_bfd,
3317 symtab_hdr->sh_link,
3318 sym->st_name);
3319 if (name == NULL)
3320 return FALSE;
3321 if (*name == '\0')
3322 name = bfd_section_name (input_bfd, sec);
3323 }
3324
3325 if (r == bfd_reloc_overflow)
3326 {
3327
3328 if (! ((*info->callbacks->reloc_overflow)
3329 (info, (h ? &h->root : NULL), name, howto->name,
3330 (bfd_vma) 0, input_bfd, input_section,
3331 rel->r_offset)))
3332 return FALSE;
3333 }
3334 else
3335 {
3336 (*_bfd_error_handler)
3337 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3338 input_bfd, input_section,
3339 (long) rel->r_offset, name, (int) r);
3340 return FALSE;
3341 }
3342 }
3343 }
3344
3345 return TRUE;
3346 }
3347
3348 /* Generate the PLT slots together with the dynamic relocations needed
3349 for IFUNC symbols. */
3350
3351 static void
3352 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3353 struct bfd_link_info *info,
3354 struct elf_link_hash_entry *h,
3355 struct elf_s390_link_hash_table *htab,
3356 bfd_vma plt_offset,
3357 bfd_vma resolver_address)
3358 {
3359 bfd_vma plt_index;
3360 bfd_vma got_offset;
3361 Elf_Internal_Rela rela;
3362 bfd_byte *loc;
3363 asection *plt, *gotplt, *relplt;
3364
3365 if (htab->elf.iplt == NULL
3366 || htab->elf.igotplt == NULL
3367 || htab->elf.irelplt == NULL)
3368 abort ();
3369
3370 /* Index of the PLT slot within iplt section. */
3371 plt_index = plt_offset / PLT_ENTRY_SIZE;
3372 plt = htab->elf.iplt;
3373 /* Offset into the igot.plt section. */
3374 got_offset = plt_index * GOT_ENTRY_SIZE;
3375 gotplt = htab->elf.igotplt;
3376 relplt = htab->elf.irelplt;
3377
3378 /* Fill in the blueprint of a PLT. */
3379 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3380 PLT_ENTRY_SIZE);
3381
3382 /* Fixup the relative address to the GOT entry */
3383 bfd_put_32 (output_bfd,
3384 (gotplt->output_section->vma +
3385 gotplt->output_offset + got_offset
3386 - (plt->output_section->vma +
3387 plt->output_offset +
3388 plt_offset))/2,
3389 plt->contents + plt_offset + 2);
3390 /* Fixup the relative branch to PLT 0 */
3391 bfd_put_32 (output_bfd, - (plt->output_offset +
3392 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3393 plt->contents + plt_offset + 24);
3394 /* Fixup offset into .rela.plt section. */
3395 bfd_put_32 (output_bfd, relplt->output_offset +
3396 plt_index * sizeof (Elf64_External_Rela),
3397 plt->contents + plt_offset + 28);
3398
3399 /* Fill in the entry in the global offset table.
3400 Points to instruction after GOT offset. */
3401 bfd_put_64 (output_bfd,
3402 (plt->output_section->vma
3403 + plt->output_offset
3404 + plt_offset
3405 + 14),
3406 gotplt->contents + got_offset);
3407
3408 /* Fill in the entry in the .rela.plt section. */
3409 rela.r_offset = (gotplt->output_section->vma
3410 + gotplt->output_offset
3411 + got_offset);
3412
3413 if (!h
3414 || h->dynindx == -1
3415 || ((bfd_link_executable (info)
3416 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3417 && h->def_regular))
3418 {
3419 /* The symbol can be locally resolved. */
3420 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3421 rela.r_addend = resolver_address;
3422 }
3423 else
3424 {
3425 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3426 rela.r_addend = 0;
3427 }
3428
3429 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3430 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3431 }
3432
3433
3434 /* Finish up dynamic symbol handling. We set the contents of various
3435 dynamic sections here. */
3436
3437 static bfd_boolean
3438 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3439 struct bfd_link_info *info,
3440 struct elf_link_hash_entry *h,
3441 Elf_Internal_Sym *sym)
3442 {
3443 struct elf_s390_link_hash_table *htab;
3444 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3445
3446 htab = elf_s390_hash_table (info);
3447 if (htab == NULL)
3448 return FALSE;
3449
3450 if (h->plt.offset != (bfd_vma) -1)
3451 {
3452 bfd_vma plt_index;
3453 bfd_vma got_offset;
3454 Elf_Internal_Rela rela;
3455 bfd_byte *loc;
3456
3457 /* This symbol has an entry in the procedure linkage table. Set
3458 it up. */
3459 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3460 {
3461 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3462 htab, h->plt.offset,
3463 eh->ifunc_resolver_address +
3464 eh->ifunc_resolver_section->output_offset +
3465 eh->ifunc_resolver_section->output_section->vma);
3466
3467 /* Do not return yet. Handling of explicit GOT slots of
3468 IFUNC symbols is below. */
3469 }
3470 else
3471 {
3472 if (h->dynindx == -1
3473 || htab->elf.splt == NULL
3474 || htab->elf.sgotplt == NULL
3475 || htab->elf.srelplt == NULL)
3476 abort ();
3477
3478 /* Calc. index no.
3479 Current offset - size first entry / entry size. */
3480 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3481
3482 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3483 addr & GOT addr. */
3484 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3485
3486 /* Fill in the blueprint of a PLT. */
3487 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3488 PLT_ENTRY_SIZE);
3489
3490 /* Fixup the relative address to the GOT entry */
3491 bfd_put_32 (output_bfd,
3492 (htab->elf.sgotplt->output_section->vma +
3493 htab->elf.sgotplt->output_offset + got_offset
3494 - (htab->elf.splt->output_section->vma +
3495 htab->elf.splt->output_offset +
3496 h->plt.offset))/2,
3497 htab->elf.splt->contents + h->plt.offset + 2);
3498 /* Fixup the relative branch to PLT 0 */
3499 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3500 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3501 htab->elf.splt->contents + h->plt.offset + 24);
3502 /* Fixup offset into .rela.plt section. */
3503 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3504 htab->elf.splt->contents + h->plt.offset + 28);
3505
3506 /* Fill in the entry in the global offset table.
3507 Points to instruction after GOT offset. */
3508 bfd_put_64 (output_bfd,
3509 (htab->elf.splt->output_section->vma
3510 + htab->elf.splt->output_offset
3511 + h->plt.offset
3512 + 14),
3513 htab->elf.sgotplt->contents + got_offset);
3514
3515 /* Fill in the entry in the .rela.plt section. */
3516 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3517 + htab->elf.sgotplt->output_offset
3518 + got_offset);
3519 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3520 rela.r_addend = 0;
3521 loc = htab->elf.srelplt->contents + plt_index *
3522 sizeof (Elf64_External_Rela);
3523 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3524
3525 if (!h->def_regular)
3526 {
3527 /* Mark the symbol as undefined, rather than as defined in
3528 the .plt section. Leave the value alone. This is a clue
3529 for the dynamic linker, to make function pointer
3530 comparisons work between an application and shared
3531 library. */
3532 sym->st_shndx = SHN_UNDEF;
3533 }
3534 }
3535 }
3536
3537 if (h->got.offset != (bfd_vma) -1
3538 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3539 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3540 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3541 {
3542 Elf_Internal_Rela rela;
3543 bfd_byte *loc;
3544
3545 /* This symbol has an entry in the global offset table. Set it
3546 up. */
3547 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3548 abort ();
3549
3550 rela.r_offset = (htab->elf.sgot->output_section->vma
3551 + htab->elf.sgot->output_offset
3552 + (h->got.offset &~ (bfd_vma) 1));
3553
3554 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3555 {
3556 if (bfd_link_pic (info))
3557 {
3558 /* An explicit GOT slot usage needs GLOB_DAT. If the
3559 symbol references local the implicit got.iplt slot
3560 will be used and the IRELATIVE reloc has been created
3561 above. */
3562 goto do_glob_dat;
3563 }
3564 else
3565 {
3566 /* For non-shared objects explicit GOT slots must be
3567 filled with the PLT slot address for pointer
3568 equality reasons. */
3569 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3570 + htab->elf.iplt->output_offset
3571 + h->plt.offset),
3572 htab->elf.sgot->contents + h->got.offset);
3573 return TRUE;
3574 }
3575 }
3576 else if (bfd_link_pic (info)
3577 && SYMBOL_REFERENCES_LOCAL (info, h))
3578 {
3579 /* If this is a static link, or it is a -Bsymbolic link and
3580 the symbol is defined locally or was forced to be local
3581 because of a version file, we just want to emit a
3582 RELATIVE reloc. The entry in the global offset table
3583 will already have been initialized in the
3584 relocate_section function. */
3585 if (!h->def_regular)
3586 return FALSE;
3587 BFD_ASSERT((h->got.offset & 1) != 0);
3588 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3589 rela.r_addend = (h->root.u.def.value
3590 + h->root.u.def.section->output_section->vma
3591 + h->root.u.def.section->output_offset);
3592 }
3593 else
3594 {
3595 BFD_ASSERT((h->got.offset & 1) == 0);
3596 do_glob_dat:
3597 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3598 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3599 rela.r_addend = 0;
3600 }
3601
3602 loc = htab->elf.srelgot->contents;
3603 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3604 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3605 }
3606
3607 if (h->needs_copy)
3608 {
3609 Elf_Internal_Rela rela;
3610 bfd_byte *loc;
3611
3612 /* This symbols needs a copy reloc. Set it up. */
3613
3614 if (h->dynindx == -1
3615 || (h->root.type != bfd_link_hash_defined
3616 && h->root.type != bfd_link_hash_defweak)
3617 || htab->srelbss == NULL)
3618 abort ();
3619
3620 rela.r_offset = (h->root.u.def.value
3621 + h->root.u.def.section->output_section->vma
3622 + h->root.u.def.section->output_offset);
3623 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3624 rela.r_addend = 0;
3625 loc = htab->srelbss->contents;
3626 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3627 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3628 }
3629
3630 /* Mark some specially defined symbols as absolute. */
3631 if (h == htab->elf.hdynamic
3632 || h == htab->elf.hgot
3633 || h == htab->elf.hplt)
3634 sym->st_shndx = SHN_ABS;
3635
3636 return TRUE;
3637 }
3638
3639 /* Used to decide how to sort relocs in an optimal manner for the
3640 dynamic linker, before writing them out. */
3641
3642 static enum elf_reloc_type_class
3643 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3644 const asection *rel_sec ATTRIBUTE_UNUSED,
3645 const Elf_Internal_Rela *rela)
3646 {
3647 bfd *abfd = info->output_bfd;
3648 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3649 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3650 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3651 Elf_Internal_Sym sym;
3652
3653 if (htab->elf.dynsym == NULL
3654 || !bed->s->swap_symbol_in (abfd,
3655 (htab->elf.dynsym->contents
3656 + r_symndx * bed->s->sizeof_sym),
3657 0, &sym))
3658 abort ();
3659
3660 /* Check relocation against STT_GNU_IFUNC symbol. */
3661 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3662 return reloc_class_ifunc;
3663
3664 switch ((int) ELF64_R_TYPE (rela->r_info))
3665 {
3666 case R_390_RELATIVE:
3667 return reloc_class_relative;
3668 case R_390_JMP_SLOT:
3669 return reloc_class_plt;
3670 case R_390_COPY:
3671 return reloc_class_copy;
3672 default:
3673 return reloc_class_normal;
3674 }
3675 }
3676
3677 /* Finish up the dynamic sections. */
3678
3679 static bfd_boolean
3680 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3681 struct bfd_link_info *info)
3682 {
3683 struct elf_s390_link_hash_table *htab;
3684 bfd *dynobj;
3685 asection *sdyn;
3686 bfd *ibfd;
3687 unsigned int i;
3688
3689 htab = elf_s390_hash_table (info);
3690 if (htab == NULL)
3691 return FALSE;
3692
3693 dynobj = htab->elf.dynobj;
3694 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3695
3696 if (htab->elf.dynamic_sections_created)
3697 {
3698 Elf64_External_Dyn *dyncon, *dynconend;
3699
3700 if (sdyn == NULL || htab->elf.sgot == NULL)
3701 abort ();
3702
3703 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3704 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3705 for (; dyncon < dynconend; dyncon++)
3706 {
3707 Elf_Internal_Dyn dyn;
3708 asection *s;
3709
3710 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3711
3712 switch (dyn.d_tag)
3713 {
3714 default:
3715 continue;
3716
3717 case DT_PLTGOT:
3718 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3719 break;
3720
3721 case DT_JMPREL:
3722 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3723 break;
3724
3725 case DT_PLTRELSZ:
3726 s = htab->elf.srelplt->output_section;
3727 dyn.d_un.d_val = s->size;
3728 break;
3729
3730 case DT_RELASZ:
3731 /* The procedure linkage table relocs (DT_JMPREL) should
3732 not be included in the overall relocs (DT_RELA).
3733 Therefore, we override the DT_RELASZ entry here to
3734 make it not include the JMPREL relocs. Since the
3735 linker script arranges for .rela.plt to follow all
3736 other relocation sections, we don't have to worry
3737 about changing the DT_RELA entry. */
3738 s = htab->elf.srelplt->output_section;
3739 dyn.d_un.d_val -= s->size;
3740 break;
3741 }
3742
3743 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3744 }
3745
3746 /* Fill in the special first entry in the procedure linkage table. */
3747 if (htab->elf.splt && htab->elf.splt->size > 0)
3748 {
3749 /* fill in blueprint for plt 0 entry */
3750 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3751 PLT_FIRST_ENTRY_SIZE);
3752 /* Fixup relative address to start of GOT */
3753 bfd_put_32 (output_bfd,
3754 (htab->elf.sgotplt->output_section->vma +
3755 htab->elf.sgotplt->output_offset
3756 - htab->elf.splt->output_section->vma - 6)/2,
3757 htab->elf.splt->contents + 8);
3758 }
3759 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3760 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3761 = PLT_ENTRY_SIZE;
3762 }
3763
3764 if (htab->elf.sgotplt)
3765 {
3766 /* Fill in the first three entries in the global offset table. */
3767 if (htab->elf.sgotplt->size > 0)
3768 {
3769 bfd_put_64 (output_bfd,
3770 (sdyn == NULL ? (bfd_vma) 0
3771 : sdyn->output_section->vma + sdyn->output_offset),
3772 htab->elf.sgotplt->contents);
3773 /* One entry for shared object struct ptr. */
3774 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3775 /* One entry for _dl_runtime_resolve. */
3776 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
3777 }
3778
3779 elf_section_data (htab->elf.sgot->output_section)
3780 ->this_hdr.sh_entsize = 8;
3781 }
3782
3783 /* Finish dynamic symbol for local IFUNC symbols. */
3784 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3785 {
3786 struct plt_entry *local_plt;
3787 Elf_Internal_Sym *isym;
3788 Elf_Internal_Shdr *symtab_hdr;
3789
3790 symtab_hdr = &elf_symtab_hdr (ibfd);
3791
3792 local_plt = elf_s390_local_plt (ibfd);
3793 if (local_plt != NULL)
3794 for (i = 0; i < symtab_hdr->sh_info; i++)
3795 {
3796 if (local_plt[i].plt.offset != (bfd_vma) -1)
3797 {
3798 asection *sec = local_plt[i].sec;
3799 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3800 if (isym == NULL)
3801 return FALSE;
3802
3803 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3804 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3805 local_plt[i].plt.offset,
3806 isym->st_value
3807 + sec->output_section->vma
3808 + sec->output_offset);
3809
3810 }
3811 }
3812 }
3813
3814 return TRUE;
3815 }
3816
3817 /* Return address for Ith PLT stub in section PLT, for relocation REL
3818 or (bfd_vma) -1 if it should not be included. */
3819
3820 static bfd_vma
3821 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3822 const arelent *rel ATTRIBUTE_UNUSED)
3823 {
3824 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3825 }
3826
3827 /* Merge backend specific data from an object file to the output
3828 object file when linking. */
3829
3830 static bfd_boolean
3831 elf64_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3832 {
3833 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3834 return TRUE;
3835
3836 if (!elf_s390_merge_obj_attributes (ibfd, obfd))
3837 return FALSE;
3838
3839 return TRUE;
3840 }
3841
3842 /* Why was the hash table entry size definition changed from
3843 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3844 this is the only reason for the s390_elf64_size_info structure. */
3845
3846 const struct elf_size_info s390_elf64_size_info =
3847 {
3848 sizeof (Elf64_External_Ehdr),
3849 sizeof (Elf64_External_Phdr),
3850 sizeof (Elf64_External_Shdr),
3851 sizeof (Elf64_External_Rel),
3852 sizeof (Elf64_External_Rela),
3853 sizeof (Elf64_External_Sym),
3854 sizeof (Elf64_External_Dyn),
3855 sizeof (Elf_External_Note),
3856 8, /* hash-table entry size. */
3857 1, /* internal relocations per external relocations. */
3858 64, /* arch_size. */
3859 3, /* log_file_align. */
3860 ELFCLASS64, EV_CURRENT,
3861 bfd_elf64_write_out_phdrs,
3862 bfd_elf64_write_shdrs_and_ehdr,
3863 bfd_elf64_checksum_contents,
3864 bfd_elf64_write_relocs,
3865 bfd_elf64_swap_symbol_in,
3866 bfd_elf64_swap_symbol_out,
3867 bfd_elf64_slurp_reloc_table,
3868 bfd_elf64_slurp_symbol_table,
3869 bfd_elf64_swap_dyn_in,
3870 bfd_elf64_swap_dyn_out,
3871 bfd_elf64_swap_reloc_in,
3872 bfd_elf64_swap_reloc_out,
3873 bfd_elf64_swap_reloca_in,
3874 bfd_elf64_swap_reloca_out
3875 };
3876
3877 #define TARGET_BIG_SYM s390_elf64_vec
3878 #define TARGET_BIG_NAME "elf64-s390"
3879 #define ELF_ARCH bfd_arch_s390
3880 #define ELF_TARGET_ID S390_ELF_DATA
3881 #define ELF_MACHINE_CODE EM_S390
3882 #define ELF_MACHINE_ALT1 EM_S390_OLD
3883 #define ELF_MAXPAGESIZE 0x1000
3884
3885 #define elf_backend_size_info s390_elf64_size_info
3886
3887 #define elf_backend_can_gc_sections 1
3888 #define elf_backend_can_refcount 1
3889 #define elf_backend_want_got_plt 1
3890 #define elf_backend_plt_readonly 1
3891 #define elf_backend_want_plt_sym 0
3892 #define elf_backend_got_header_size 24
3893 #define elf_backend_rela_normal 1
3894
3895 #define elf_info_to_howto elf_s390_info_to_howto
3896
3897 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3898 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3899 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3900 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3901 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3902
3903 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3904 #define elf_backend_check_relocs elf_s390_check_relocs
3905 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3906 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3907 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3908 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3909 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3910 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3911 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3912 #define elf_backend_relocate_section elf_s390_relocate_section
3913 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3914 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3915 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3916 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3917 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3918
3919 #define bfd_elf64_mkobject elf_s390_mkobject
3920 #define elf_backend_object_p elf_s390_object_p
3921
3922 /* Enable ELF64 archive functions. */
3923 #define bfd_elf64_archive_functions
3924 extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
3925 extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
3926
3927 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3928 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3929 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3930 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3931 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3932 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3933 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3934 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3935 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3936
3937 #include "elf64-target.h"
GDB Binutils - Deliverables
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