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sim: Don't overwrite stored errno in sim_syscall_multi
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
CommitLineData
a85d7ed0 1/* IBM S/390-specific support for 64-bit ELF
219d1afa 2 Copyright (C) 2000-2018 Free Software Foundation, Inc.
a85d7ed0
NC		 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
cd123cb7 9 the Free Software Foundation; either version 3 of the License, or
a85d7ed0
NC		 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
3e110533 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
53e09e0a 20 02110-1301, USA. */
a85d7ed0 21
a85d7ed0 22#include "sysdep.h"
3db64b00 23#include "bfd.h"
a85d7ed0
NC		 24#include "bfdlink.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
a85d7ed0 27#include "elf/s390.h"
b4cbbe8f 28#include "elf-s390.h"
e3e9290d 29#include <stdarg.h>
a85d7ed0
NC		 30
31/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33#define MINUS_ONE (((bfd_vma)0) - 1)
34
2c3fc389
NC		 35static bfd_reloc_status_type
36s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
37 asection *, bfd *, char **);
38static bfd_reloc_status_type
39s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
40 asection *, bfd *, char **);
41
a85d7ed0
NC		 42/* The relocation "howto" table. */
43static reloc_howto_type elf_howto_table[] =
44{
45 HOWTO (R_390_NONE, /* type */
46 0, /* rightshift */
6346d5ca 47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
a85d7ed0 48 0, /* bitsize */
b34976b6 49 FALSE, /* pc_relative */
a85d7ed0
NC		 50 0, /* bitpos */
51 complain_overflow_dont, /* complain_on_overflow */
52 bfd_elf_generic_reloc, /* special_function */
53 "R_390_NONE", /* name */
b34976b6 54 FALSE, /* partial_inplace */
a85d7ed0
NC		 55 0, /* src_mask */
56 0, /* dst_mask */
b34976b6
AM		 57 FALSE), /* pcrel_offset */
58
07d6d2b8
AM		 59 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
5236c819 67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
07d6d2b8 68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
15f8604d 69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
07d6d2b8 70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
5236c819 71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
07d6d2b8 72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
5236c819 73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
07d6d2b8
AM		 74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
75 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
5236c819 78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
07d6d2b8 79 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
5236c819 80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
07d6d2b8 81 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
5236c819 82 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
07d6d2b8 83 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
5236c819 84 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
07d6d2b8
AM		 85 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
87 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
5236c819
MS		 94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
07d6d2b8 96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
5236c819
MS		 97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
07d6d2b8 99 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
5236c819 100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
07d6d2b8
AM		 101 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
5236c819 103 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
07d6d2b8 104 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
5236c819 105 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
07d6d2b8 106 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
5236c819 107 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
07d6d2b8 108 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
5236c819 109 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
07d6d2b8
AM		 110 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
111 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
5236c819 112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
07d6d2b8 113 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
5236c819
MS		 114 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
115 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
07d6d2b8 117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
5236c819
MS		 118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
123 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
07d6d2b8 125 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
5236c819 126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
07d6d2b8 127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
5236c819 128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
07d6d2b8 129 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
5236c819 130 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
69fc87f1
MS		 131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
07d6d2b8 138 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
69fc87f1
MS		 139 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
140 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
07d6d2b8 149 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
69fc87f1
MS		 150 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
151 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
07d6d2b8 154 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
69fc87f1
MS		 155 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
07d6d2b8 165 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
bd1ea41b
MS		 166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
07d6d2b8 169 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
bd1ea41b
MS		 170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
470b557a
AK		 173 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
07d6d2b8
AM		 175 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
fb798c50 178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
07d6d2b8
AM		 179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
181 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
fb798c50 182 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
a85d7ed0
NC		 183};
184
185/* GNU extension to record C++ vtable hierarchy. */
186static reloc_howto_type elf64_s390_vtinherit_howto =
b34976b6 187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
a85d7ed0 188static reloc_howto_type elf64_s390_vtentry_howto =
b34976b6 189 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);
a85d7ed0
NC		 190
191static reloc_howto_type *
f3185997 192elf_s390_reloc_type_lookup (bfd *abfd,
2c3fc389 193 bfd_reloc_code_real_type code)
a85d7ed0 194{
0451c93c
MS		 195 switch (code)
196 {
197 case BFD_RELOC_NONE:
198 return &elf_howto_table[(int) R_390_NONE];
199 case BFD_RELOC_8:
200 return &elf_howto_table[(int) R_390_8];
201 case BFD_RELOC_390_12:
202 return &elf_howto_table[(int) R_390_12];
203 case BFD_RELOC_16:
204 return &elf_howto_table[(int) R_390_16];
205 case BFD_RELOC_32:
206 return &elf_howto_table[(int) R_390_32];
207 case BFD_RELOC_CTOR:
208 return &elf_howto_table[(int) R_390_32];
209 case BFD_RELOC_32_PCREL:
210 return &elf_howto_table[(int) R_390_PC32];
211 case BFD_RELOC_390_GOT12:
212 return &elf_howto_table[(int) R_390_GOT12];
213 case BFD_RELOC_32_GOT_PCREL:
214 return &elf_howto_table[(int) R_390_GOT32];
215 case BFD_RELOC_390_PLT32:
216 return &elf_howto_table[(int) R_390_PLT32];
217 case BFD_RELOC_390_COPY:
218 return &elf_howto_table[(int) R_390_COPY];
219 case BFD_RELOC_390_GLOB_DAT:
220 return &elf_howto_table[(int) R_390_GLOB_DAT];
221 case BFD_RELOC_390_JMP_SLOT:
222 return &elf_howto_table[(int) R_390_JMP_SLOT];
223 case BFD_RELOC_390_RELATIVE:
224 return &elf_howto_table[(int) R_390_RELATIVE];
225 case BFD_RELOC_32_GOTOFF:
5236c819 226 return &elf_howto_table[(int) R_390_GOTOFF32];
0451c93c
MS		 227 case BFD_RELOC_390_GOTPC:
228 return &elf_howto_table[(int) R_390_GOTPC];
229 case BFD_RELOC_390_GOT16:
230 return &elf_howto_table[(int) R_390_GOT16];
231 case BFD_RELOC_16_PCREL:
232 return &elf_howto_table[(int) R_390_PC16];
fb798c50
AK		 233 case BFD_RELOC_390_PC12DBL:
234 return &elf_howto_table[(int) R_390_PC12DBL];
235 case BFD_RELOC_390_PLT12DBL:
236 return &elf_howto_table[(int) R_390_PLT12DBL];
0451c93c
MS		 237 case BFD_RELOC_390_PC16DBL:
238 return &elf_howto_table[(int) R_390_PC16DBL];
239 case BFD_RELOC_390_PLT16DBL:
240 return &elf_howto_table[(int) R_390_PLT16DBL];
fb798c50
AK		 241 case BFD_RELOC_390_PC24DBL:
242 return &elf_howto_table[(int) R_390_PC24DBL];
243 case BFD_RELOC_390_PLT24DBL:
244 return &elf_howto_table[(int) R_390_PLT24DBL];
0451c93c
MS		 245 case BFD_RELOC_390_PC32DBL:
246 return &elf_howto_table[(int) R_390_PC32DBL];
247 case BFD_RELOC_390_PLT32DBL:
248 return &elf_howto_table[(int) R_390_PLT32DBL];
249 case BFD_RELOC_390_GOTPCDBL:
250 return &elf_howto_table[(int) R_390_GOTPCDBL];
251 case BFD_RELOC_64:
252 return &elf_howto_table[(int) R_390_64];
253 case BFD_RELOC_64_PCREL:
254 return &elf_howto_table[(int) R_390_PC64];
255 case BFD_RELOC_390_GOT64:
256 return &elf_howto_table[(int) R_390_GOT64];
257 case BFD_RELOC_390_PLT64:
258 return &elf_howto_table[(int) R_390_PLT64];
259 case BFD_RELOC_390_GOTENT:
260 return &elf_howto_table[(int) R_390_GOTENT];
5236c819
MS		 261 case BFD_RELOC_16_GOTOFF:
262 return &elf_howto_table[(int) R_390_GOTOFF16];
263 case BFD_RELOC_390_GOTOFF64:
264 return &elf_howto_table[(int) R_390_GOTOFF64];
265 case BFD_RELOC_390_GOTPLT12:
266 return &elf_howto_table[(int) R_390_GOTPLT12];
267 case BFD_RELOC_390_GOTPLT16:
268 return &elf_howto_table[(int) R_390_GOTPLT16];
269 case BFD_RELOC_390_GOTPLT32:
270 return &elf_howto_table[(int) R_390_GOTPLT32];
271 case BFD_RELOC_390_GOTPLT64:
272 return &elf_howto_table[(int) R_390_GOTPLT64];
273 case BFD_RELOC_390_GOTPLTENT:
274 return &elf_howto_table[(int) R_390_GOTPLTENT];
275 case BFD_RELOC_390_PLTOFF16:
276 return &elf_howto_table[(int) R_390_PLTOFF16];
277 case BFD_RELOC_390_PLTOFF32:
278 return &elf_howto_table[(int) R_390_PLTOFF32];
279 case BFD_RELOC_390_PLTOFF64:
280 return &elf_howto_table[(int) R_390_PLTOFF64];
69fc87f1
MS		 281 case BFD_RELOC_390_TLS_LOAD:
282 return &elf_howto_table[(int) R_390_TLS_LOAD];
283 case BFD_RELOC_390_TLS_GDCALL:
284 return &elf_howto_table[(int) R_390_TLS_GDCALL];
285 case BFD_RELOC_390_TLS_LDCALL:
286 return &elf_howto_table[(int) R_390_TLS_LDCALL];
287 case BFD_RELOC_390_TLS_GD64:
288 return &elf_howto_table[(int) R_390_TLS_GD64];
289 case BFD_RELOC_390_TLS_GOTIE12:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
291 case BFD_RELOC_390_TLS_GOTIE64:
292 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
293 case BFD_RELOC_390_TLS_LDM64:
294 return &elf_howto_table[(int) R_390_TLS_LDM64];
295 case BFD_RELOC_390_TLS_IE64:
296 return &elf_howto_table[(int) R_390_TLS_IE64];
297 case BFD_RELOC_390_TLS_IEENT:
298 return &elf_howto_table[(int) R_390_TLS_IEENT];
299 case BFD_RELOC_390_TLS_LE64:
300 return &elf_howto_table[(int) R_390_TLS_LE64];
301 case BFD_RELOC_390_TLS_LDO64:
302 return &elf_howto_table[(int) R_390_TLS_LDO64];
303 case BFD_RELOC_390_TLS_DTPMOD:
304 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
305 case BFD_RELOC_390_TLS_DTPOFF:
306 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
307 case BFD_RELOC_390_TLS_TPOFF:
308 return &elf_howto_table[(int) R_390_TLS_TPOFF];
bd1ea41b
MS		 309 case BFD_RELOC_390_20:
310 return &elf_howto_table[(int) R_390_20];
311 case BFD_RELOC_390_GOT20:
312 return &elf_howto_table[(int) R_390_GOT20];
313 case BFD_RELOC_390_GOTPLT20:
314 return &elf_howto_table[(int) R_390_GOTPLT20];
315 case BFD_RELOC_390_TLS_GOTIE20:
316 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
470b557a
AK		 317 case BFD_RELOC_390_IRELATIVE:
318 return &elf_howto_table[(int) R_390_IRELATIVE];
5236c819
MS		 319 case BFD_RELOC_VTABLE_INHERIT:
320 return &elf64_s390_vtinherit_howto;
321 case BFD_RELOC_VTABLE_ENTRY:
322 return &elf64_s390_vtentry_howto;
0451c93c
MS		 323 default:
324 break;
325 }
f3185997
NC		 326
327 /* xgettext:c-format */
e8f5af78 328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
f3185997
NC		 329 bfd_set_error (bfd_error_bad_value);
330 return NULL;
a85d7ed0
NC		 331}
332
157090f7
AM		 333static reloc_howto_type *
334elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
335 const char *r_name)
336{
337 unsigned int i;
338
339 for (i = 0;
340 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
341 i++)
342 if (elf_howto_table[i].name != NULL
343 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
344 return &elf_howto_table[i];
345
0bc7245a
JK		 346 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
347 return &elf64_s390_vtinherit_howto;
348 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
349 return &elf64_s390_vtentry_howto;
157090f7
AM		 350
351 return NULL;
352}
353
a85d7ed0
NC		 354/* We need to use ELF64_R_TYPE so we have our own copy of this function,
355 and elf64-s390.c has its own copy. */
356
f3185997 357static bfd_boolean
2c3fc389
NC		 358elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
359 arelent *cache_ptr,
360 Elf_Internal_Rela *dst)
a85d7ed0 361{
d0fb9a8d 362 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
f3185997 363
d0fb9a8d 364 switch (r_type)
a85d7ed0
NC		 365 {
366 case R_390_GNU_VTINHERIT:
367 cache_ptr->howto = &elf64_s390_vtinherit_howto;
368 break;
369
370 case R_390_GNU_VTENTRY:
371 cache_ptr->howto = &elf64_s390_vtentry_howto;
372 break;
373
374 default:
d0fb9a8d
JJ		 375 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
376 {
695344c0 377 /* xgettext:c-format */
0aa13fee
AM		 378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
379 abfd, r_type);
f3185997
NC		 380 bfd_set_error (bfd_error_bad_value);
381 return FALSE;
d0fb9a8d
JJ		 382 }
383 cache_ptr->howto = &elf_howto_table[r_type];
99c79b2e 384 }
f3185997 385 return TRUE;
a85d7ed0
NC		 386}
387
69fc87f1
MS		 388/* A relocation function which doesn't do anything. */
389static bfd_reloc_status_type
2c3fc389
NC		 390s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
391 arelent *reloc_entry,
392 asymbol *symbol ATTRIBUTE_UNUSED,
393 void * data ATTRIBUTE_UNUSED,
394 asection *input_section,
395 bfd *output_bfd,
396 char **error_message ATTRIBUTE_UNUSED)
69fc87f1
MS		 397{
398 if (output_bfd)
399 reloc_entry->address += input_section->output_offset;
400 return bfd_reloc_ok;
401}
402
bd1ea41b
MS		 403/* Handle the large displacement relocs. */
404static bfd_reloc_status_type
2c3fc389
NC		 405s390_elf_ldisp_reloc (bfd *abfd,
406 arelent *reloc_entry,
407 asymbol *symbol,
408 void * data,
409 asection *input_section,
410 bfd *output_bfd,
411 char **error_message ATTRIBUTE_UNUSED)
bd1ea41b
MS		 412{
413 reloc_howto_type *howto = reloc_entry->howto;
414 bfd_vma relocation;
415 bfd_vma insn;
416
417 if (output_bfd != (bfd *) NULL
418 && (symbol->flags & BSF_SECTION_SYM) == 0
419 && (! howto->partial_inplace
420 || reloc_entry->addend == 0))
421 {
422 reloc_entry->address += input_section->output_offset;
423 return bfd_reloc_ok;
424 }
425 if (output_bfd != NULL)
426 return bfd_reloc_continue;
427
07515404 428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
bd1ea41b
MS		 429 return bfd_reloc_outofrange;
430
431 relocation = (symbol->value
432 + symbol->section->output_section->vma
433 + symbol->section->output_offset);
434 relocation += reloc_entry->addend;
435 if (howto->pc_relative)
436 {
437 relocation -= (input_section->output_section->vma
438 + input_section->output_offset);
439 relocation -= reloc_entry->address;
440 }
441
68ffbac6 442 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
bd1ea41b
MS		 443 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
444 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
445
446 if ((bfd_signed_vma) relocation < - 0x80000
447 || (bfd_signed_vma) relocation > 0x7ffff)
448 return bfd_reloc_overflow;
449 else
450 return bfd_reloc_ok;
451}
452
b34976b6 453static bfd_boolean
2c3fc389 454elf_s390_is_local_label_name (bfd *abfd, const char *name)
a85d7ed0
NC		 455{
456 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
b34976b6 457 return TRUE;
a85d7ed0
NC		 458
459 return _bfd_elf_is_local_label_name (abfd, name);
460}
461
462/* Functions for the 390 ELF linker. */
463
464/* The name of the dynamic interpreter. This is put in the .interp
465 section. */
466
87049b0d 467#define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
a85d7ed0 468
64285810
MS		 469/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
470 copying dynamic variables from a shared lib into an app's dynbss
471 section, and instead use a dynamic relocation to point into the
472 shared lib. */
473#define ELIMINATE_COPY_RELOCS 1
474
a85d7ed0
NC		 475/* The size in bytes of the first entry in the procedure linkage table. */
476#define PLT_FIRST_ENTRY_SIZE 32
477/* The size in bytes of an entry in the procedure linkage table. */
99c79b2e 478#define PLT_ENTRY_SIZE 32
a85d7ed0
NC		 479
480#define GOT_ENTRY_SIZE 8
481
470b557a
AK		 482#define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
483
afca762f 484/* The first three entries in a global offset table are reserved,
a85d7ed0
NC		 485 and the initial contents are unimportant (we zero them out).
486 Subsequent entries look like this. See the SVR4 ABI 386
487 supplement to see how this works. */
488
489/* For the s390, simple addr offset can only be 0 - 4096.
490 To use the full 16777216 TB address space, several instructions
491 are needed to load an address in a register and execute
492 a branch( or just saving the address)
493
99c79b2e 494 Furthermore, only r 0 and 1 are free to use!!! */
a85d7ed0
NC		 495
496/* The first 3 words in the GOT are then reserved.
497 Word 0 is the address of the dynamic table.
498 Word 1 is a pointer to a structure describing the object
499 Word 2 is used to point to the loader entry address.
500
501 The code for PLT entries looks like this:
502
503 The GOT holds the address in the PLT to be executed.
504 The loader then gets:
3b67f094
MK		 505 48(15) = Pointer to the structure describing the object.
506 56(15) = Offset in symbol table
a85d7ed0
NC		 507 The loader must then find the module where the function is
508 and insert the address in the GOT.
509
510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
07d6d2b8
AM		 511 LG 1,0(1) # 6 bytes Load address from GOT in r1
512 BCR 15,1 # 2 bytes Jump to address
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
afca762f
AK		 514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1
515 BRCL 15,-x # 6 bytes Jump to first PLT entry
07d6d2b8 516 .long ? # 4 bytes offset into .rela.plt
a85d7ed0
NC		 517
518 Total = 32 bytes per PLT entry
519 Fixup at offset 2: relative address to GOT entry
520 Fixup at offset 22: relative branch to PLT0
a7e28bbe 521 Fixup at offset 28: 32 bit offset into .rela.plt
a85d7ed0 522
a7e28bbe
AK		 523 A 32 bit offset into the symbol table is enough. It allows for
524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
525 object (the main program, any shared library) is limited to 4GB in
526 size. Having a .rela.plt of 2GB would already make the .plt
527 section bigger than 8GB. */
a85d7ed0 528
9aa17453
AK		 529static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
530 {
07d6d2b8
AM		 531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
533 0x07, 0xf1, /* br %r1 */
534 0x0d, 0x10, /* basr %r1,%r0 */
535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
9aa17453 538 };
a85d7ed0
NC		 539
540/* The first PLT entry pushes the offset into the symbol table
a7e28bbe
AK		 541 from R1 onto the stack at 56(15) and the loader object info
542 at 48(15), loads the loader address in R1 and jumps to it. */
a85d7ed0
NC		 543
544/* The first entry in the PLT:
545
546 PLT0:
547 STG 1,56(15) # r1 contains the offset into the symbol table
548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
550 LG 1,16(1) # get entry address of loader
551 BCR 15,1 # jump to loader
552
553 Fixup at offset 8: relative address to start of GOT. */
554
9aa17453
AK		 555static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
556 {
07d6d2b8
AM		 557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
561 0x07, 0xf1, /* br %r1 */
562 0x07, 0x00, /* nopr %r0 */
563 0x07, 0x00, /* nopr %r0 */
564 0x07, 0x00 /* nopr %r0 */
9aa17453 565 };
a85d7ed0 566
a85d7ed0
NC		 567
568/* s390 ELF linker hash entry. */
569
570struct elf_s390_link_hash_entry
571{
0451c93c 572 struct elf_link_hash_entry elf;
a85d7ed0 573
0451c93c 574 /* Track dynamic relocs copied for this symbol. */
00d8c7a9 575 struct elf_dyn_relocs *dyn_relocs;
5236c819
MS		 576
577 /* Number of GOTPLT references for a function. */
578 bfd_signed_vma gotplt_refcount;
69fc87f1
MS		 579
580#define GOT_UNKNOWN 0
581#define GOT_NORMAL 1
582#define GOT_TLS_GD 2
583#define GOT_TLS_IE 3
584#define GOT_TLS_IE_NLT 3
585 unsigned char tls_type;
470b557a
AK		 586
587 /* For pointer equality reasons we might need to change the symbol
588 type from STT_GNU_IFUNC to STT_FUNC together with its value and
589 section entry. So after alloc_dynrelocs only these values should
590 be used. In order to check whether a symbol is IFUNC use
591 s390_is_ifunc_symbol_p. */
592 bfd_vma ifunc_resolver_address;
593 asection *ifunc_resolver_section;
a85d7ed0
NC		 594};
595
69fc87f1
MS		 596#define elf_s390_hash_entry(ent) \
597 ((struct elf_s390_link_hash_entry *)(ent))
598
470b557a
AK		 599/* This structure represents an entry in the local PLT list needed for
600 local IFUNC symbols. */
601struct plt_entry
602{
603 /* The section of the local symbol.
604 Set in relocate_section and used in finish_dynamic_sections. */
605 asection *sec;
606
607 union
608 {
609 bfd_signed_vma refcount;
610 bfd_vma offset;
611 } plt;
612};
613
0ffa91dd
NC		 614/* NOTE: Keep this structure in sync with
615 the one declared in elf32-s390.c. */
69fc87f1
MS		 616struct elf_s390_obj_tdata
617{
618 struct elf_obj_tdata root;
619
470b557a
AK		 620 /* A local PLT is needed for ifunc symbols. */
621 struct plt_entry *local_plt;
622
0ffa91dd 623 /* TLS type for each local got entry. */
69fc87f1
MS		 624 char *local_got_tls_type;
625};
626
627#define elf_s390_tdata(abfd) \
628 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
629
470b557a
AK		 630#define elf_s390_local_plt(abfd) \
631 (elf_s390_tdata (abfd)->local_plt)
632
69fc87f1
MS		 633#define elf_s390_local_got_tls_type(abfd) \
634 (elf_s390_tdata (abfd)->local_got_tls_type)
635
0ffa91dd
NC		 636#define is_s390_elf(bfd) \
637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
638 && elf_tdata (bfd) != NULL \
4dfe6ac6 639 && elf_object_id (bfd) == S390_ELF_DATA)
0ffa91dd 640
69fc87f1 641static bfd_boolean
62d7a5f6 642elf_s390_mkobject (bfd *abfd)
69fc87f1 643{
0ffa91dd 644 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
4dfe6ac6 645 S390_ELF_DATA);
69fc87f1
MS		 646}
647
648static bfd_boolean
2c3fc389 649elf_s390_object_p (bfd *abfd)
69fc87f1 650{
69fc87f1
MS		 651 /* Set the right machine number for an s390 elf32 file. */
652 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
653}
654
a85d7ed0
NC		 655/* s390 ELF linker hash table. */
656
657struct elf_s390_link_hash_table
658{
0451c93c 659 struct elf_link_hash_table elf;
a85d7ed0 660
0451c93c 661 /* Short-cuts to get to dynamic linker sections. */
470b557a 662 asection *irelifunc;
ec338859 663
69fc87f1
MS		 664 union {
665 bfd_signed_vma refcount;
666 bfd_vma offset;
667 } tls_ldm_got;
668
87d72d41
AM		 669 /* Small local sym cache. */
670 struct sym_cache sym_cache;
b4cbbe8f
AK		 671
672 /* Options passed from the linker. */
673 struct s390_elf_params *params;
0451c93c 674};
a85d7ed0
NC		 675
676/* Get the s390 ELF linker hash table from a link_info structure. */
677
ceada896
AA		 678#define elf_s390_hash_table(p) \
679 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
680 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
a85d7ed0 681
470b557a
AK		 682#define ELF64 1
683#include "elf-s390-common.c"
684
a85d7ed0
NC		 685/* Create an entry in an s390 ELF linker hash table. */
686
687static struct bfd_hash_entry *
2c3fc389
NC		 688link_hash_newfunc (struct bfd_hash_entry *entry,
689 struct bfd_hash_table *table,
690 const char *string)
a85d7ed0 691{
a85d7ed0
NC		 692 /* Allocate the structure if it has not already been allocated by a
693 subclass. */
0451c93c
MS		 694 if (entry == NULL)
695 {
696 entry = bfd_hash_allocate (table,
697 sizeof (struct elf_s390_link_hash_entry));
698 if (entry == NULL)
699 return entry;
700 }
a85d7ed0
NC		 701
702 /* Call the allocation method of the superclass. */
0451c93c
MS		 703 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
704 if (entry != NULL)
a85d7ed0 705 {
0451c93c
MS		 706 struct elf_s390_link_hash_entry *eh;
707
708 eh = (struct elf_s390_link_hash_entry *) entry;
709 eh->dyn_relocs = NULL;
5236c819 710 eh->gotplt_refcount = 0;
69fc87f1 711 eh->tls_type = GOT_UNKNOWN;
470b557a
AK		 712 eh->ifunc_resolver_address = 0;
713 eh->ifunc_resolver_section = NULL;
a85d7ed0
NC		 714 }
715
0451c93c 716 return entry;
a85d7ed0
NC		 717}
718
719/* Create an s390 ELF linker hash table. */
720
721static struct bfd_link_hash_table *
2c3fc389 722elf_s390_link_hash_table_create (bfd *abfd)
a85d7ed0
NC		 723{
724 struct elf_s390_link_hash_table *ret;
dc810e39 725 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
a85d7ed0 726
7bf52ea2 727 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
0451c93c 728 if (ret == NULL)
a85d7ed0
NC		 729 return NULL;
730
66eb6687 731 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
4dfe6ac6
NC		 732 sizeof (struct elf_s390_link_hash_entry),
733 S390_ELF_DATA))
a85d7ed0 734 {
e2d34d7d 735 free (ret);
a85d7ed0
NC		 736 return NULL;
737 }
738
0451c93c
MS		 739 return &ret->elf.root;
740}
741
0451c93c
MS		 742/* Copy the extra info we tack onto an elf_link_hash_entry. */
743
744static void
2c3fc389
NC		 745elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
746 struct elf_link_hash_entry *dir,
747 struct elf_link_hash_entry *ind)
0451c93c
MS		 748{
749 struct elf_s390_link_hash_entry *edir, *eind;
750
751 edir = (struct elf_s390_link_hash_entry *) dir;
752 eind = (struct elf_s390_link_hash_entry *) ind;
753
754 if (eind->dyn_relocs != NULL)
755 {
756 if (edir->dyn_relocs != NULL)
757 {
00d8c7a9
AK		 758 struct elf_dyn_relocs **pp;
759 struct elf_dyn_relocs *p;
0451c93c 760
fcfa13d2 761 /* Add reloc counts against the indirect sym to the direct sym
0451c93c
MS		 762 list. Merge any entries against the same section. */
763 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
764 {
00d8c7a9 765 struct elf_dyn_relocs *q;
0451c93c
MS		 766
767 for (q = edir->dyn_relocs; q != NULL; q = q->next)
768 if (q->sec == p->sec)
769 {
770 q->pc_count += p->pc_count;
771 q->count += p->count;
772 *pp = p->next;
773 break;
774 }
775 if (q == NULL)
776 pp = &p->next;
777 }
778 *pp = edir->dyn_relocs;
779 }
780
781 edir->dyn_relocs = eind->dyn_relocs;
782 eind->dyn_relocs = NULL;
783 }
784
69fc87f1
MS		 785 if (ind->root.type == bfd_link_hash_indirect
786 && dir->got.refcount <= 0)
787 {
788 edir->tls_type = eind->tls_type;
789 eind->tls_type = GOT_UNKNOWN;
790 }
791
64285810
MS		 792 if (ELIMINATE_COPY_RELOCS
793 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 794 && dir->dynamic_adjusted)
795 {
796 /* If called to transfer flags for a weakdef during processing
797 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
798 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
e81830c5
AM		 799 if (dir->versioned != versioned_hidden)
800 dir->ref_dynamic |= ind->ref_dynamic;
f5385ebf
AM		 801 dir->ref_regular |= ind->ref_regular;
802 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
803 dir->needs_plt |= ind->needs_plt;
804 }
64285810 805 else
fcfa13d2 806 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
0451c93c 807}
a85d7ed0 808
69fc87f1 809static int
2c3fc389
NC		 810elf_s390_tls_transition (struct bfd_link_info *info,
811 int r_type,
812 int is_local)
69fc87f1 813{
0e1862bb 814 if (bfd_link_pic (info))
69fc87f1
MS		 815 return r_type;
816
817 switch (r_type)
818 {
819 case R_390_TLS_GD64:
820 case R_390_TLS_IE64:
821 if (is_local)
822 return R_390_TLS_LE64;
823 return R_390_TLS_IE64;
824 case R_390_TLS_GOTIE64:
825 if (is_local)
826 return R_390_TLS_LE64;
827 return R_390_TLS_GOTIE64;
828 case R_390_TLS_LDM64:
829 return R_390_TLS_LE64;
830 }
831
832 return r_type;
833}
834
a85d7ed0
NC		 835/* Look through the relocs for a section during the first phase, and
836 allocate space in the global offset table or procedure linkage
837 table. */
838
b34976b6 839static bfd_boolean
4dfe6ac6
NC		 840elf_s390_check_relocs (bfd *abfd,
841 struct bfd_link_info *info,
842 asection *sec,
843 const Elf_Internal_Rela *relocs)
a85d7ed0 844{
0451c93c 845 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 846 Elf_Internal_Shdr *symtab_hdr;
847 struct elf_link_hash_entry **sym_hashes;
a85d7ed0
NC		 848 const Elf_Internal_Rela *rel;
849 const Elf_Internal_Rela *rel_end;
a85d7ed0 850 asection *sreloc;
5236c819 851 bfd_signed_vma *local_got_refcounts;
69fc87f1 852 int tls_type, old_tls_type;
a85d7ed0 853
0e1862bb 854 if (bfd_link_relocatable (info))
b34976b6 855 return TRUE;
a85d7ed0 856
0ffa91dd
NC		 857 BFD_ASSERT (is_s390_elf (abfd));
858
0451c93c 859 htab = elf_s390_hash_table (info);
4dfe6ac6
NC		 860 if (htab == NULL)
861 return FALSE;
862
0ffa91dd 863 symtab_hdr = &elf_symtab_hdr (abfd);
a85d7ed0 864 sym_hashes = elf_sym_hashes (abfd);
5236c819 865 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0 866
a85d7ed0
NC		 867 sreloc = NULL;
868
869 rel_end = relocs + sec->reloc_count;
870 for (rel = relocs; rel < rel_end; rel++)
871 {
69fc87f1 872 unsigned int r_type;
d42c267e 873 unsigned int r_symndx;
a85d7ed0 874 struct elf_link_hash_entry *h;
470b557a 875 Elf_Internal_Sym *isym;
a85d7ed0
NC		 876
877 r_symndx = ELF64_R_SYM (rel->r_info);
878
0451c93c
MS		 879 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
880 {
695344c0 881 /* xgettext:c-format */
871b3ab2 882 _bfd_error_handler (_("%pB: bad symbol index: %d"),
4eca0228 883 abfd, r_symndx);
b34976b6 884 return FALSE;
0451c93c
MS		 885 }
886
a85d7ed0 887 if (r_symndx < symtab_hdr->sh_info)
470b557a
AK		 888 {
889 /* A local symbol. */
890 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
891 abfd, r_symndx);
892 if (isym == NULL)
893 return FALSE;
894
895 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
896 {
897 struct plt_entry *plt;
898
0cb79d69
AK		 899 if (htab->elf.dynobj == NULL)
900 htab->elf.dynobj = abfd;
901
470b557a
AK		 902 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
903 return FALSE;
904
905 if (local_got_refcounts == NULL)
906 {
907 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
908 return FALSE;
909 local_got_refcounts = elf_local_got_refcounts (abfd);
910 }
911 plt = elf_s390_local_plt (abfd);
912 plt[r_symndx].plt.refcount++;
913 }
914 h = NULL;
915 }
a85d7ed0 916 else
973a3492
L		 917 {
918 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
919 while (h->root.type == bfd_link_hash_indirect
920 || h->root.type == bfd_link_hash_warning)
921 h = (struct elf_link_hash_entry *) h->root.u.i.link;
922 }
a85d7ed0 923
5236c819
MS		 924 /* Create got section and local_got_refcounts array if they
925 are needed. */
69fc87f1
MS		 926 r_type = elf_s390_tls_transition (info,
927 ELF64_R_TYPE (rel->r_info),
928 h == NULL);
929 switch (r_type)
a85d7ed0
NC		 930 {
931 case R_390_GOT12:
947216bf 932 case R_390_GOT16:
bd1ea41b 933 case R_390_GOT20:
a85d7ed0
NC		 934 case R_390_GOT32:
935 case R_390_GOT64:
936 case R_390_GOTENT:
5236c819
MS		 937 case R_390_GOTPLT12:
938 case R_390_GOTPLT16:
bd1ea41b 939 case R_390_GOTPLT20:
5236c819
MS		 940 case R_390_GOTPLT32:
941 case R_390_GOTPLT64:
942 case R_390_GOTPLTENT:
69fc87f1
MS		 943 case R_390_TLS_GD64:
944 case R_390_TLS_GOTIE12:
bd1ea41b 945 case R_390_TLS_GOTIE20:
69fc87f1
MS		 946 case R_390_TLS_GOTIE64:
947 case R_390_TLS_IEENT:
948 case R_390_TLS_IE64:
949 case R_390_TLS_LDM64:
5236c819
MS		 950 if (h == NULL
951 && local_got_refcounts == NULL)
a85d7ed0 952 {
470b557a 953 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
5236c819 954 return FALSE;
470b557a 955 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0 956 }
470b557a 957
5236c819
MS		 958 /* Fall through. */
959 case R_390_GOTOFF16:
960 case R_390_GOTOFF32:
961 case R_390_GOTOFF64:
0451c93c
MS		 962 case R_390_GOTPC:
963 case R_390_GOTPCDBL:
f41345a7 964 if (htab->elf.sgot == NULL)
0451c93c
MS		 965 {
966 if (htab->elf.dynobj == NULL)
967 htab->elf.dynobj = abfd;
ce558b89 968 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
b34976b6 969 return FALSE;
0451c93c 970 }
5236c819
MS		 971 }
972
470b557a
AK		 973 if (h != NULL)
974 {
975 if (htab->elf.dynobj == NULL)
976 htab->elf.dynobj = abfd;
977 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
978 return FALSE;
979
980 /* Make sure an IFUNC symbol defined in a non-shared object
981 always gets a PLT slot. */
982 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
983 {
984 /* The symbol is called by the dynamic loader in order
985 to resolve the relocation. So it is in fact also
986 referenced. */
987 h->ref_regular = 1;
988 h->needs_plt = 1;
989 }
990 }
991
69fc87f1 992 switch (r_type)
5236c819 993 {
5236c819
MS		 994 case R_390_GOTPC:
995 case R_390_GOTPCDBL:
470b557a
AK		 996 /* These relocs do not need a GOT slot. They just load the
997 GOT pointer itself or address something else relative to
998 the GOT. Since the GOT pointer has been set up above we
999 are done. */
0451c93c 1000 break;
d47b13e0
AK		 1001 case R_390_GOTOFF16:
1002 case R_390_GOTOFF32:
1003 case R_390_GOTOFF64:
1004 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1005 break;
1a0670f3 1006 /* Fall through. */
ec338859 1007
fb798c50 1008 case R_390_PLT12DBL:
947216bf 1009 case R_390_PLT16DBL:
fb798c50 1010 case R_390_PLT24DBL:
a85d7ed0
NC		 1011 case R_390_PLT32:
1012 case R_390_PLT32DBL:
1013 case R_390_PLT64:
5236c819
MS		 1014 case R_390_PLTOFF16:
1015 case R_390_PLTOFF32:
1016 case R_390_PLTOFF64:
a85d7ed0 1017 /* This symbol requires a procedure linkage table entry. We
947216bf
AM		 1018 actually build the entry in adjust_dynamic_symbol,
1019 because this might be a case of linking PIC code which is
1020 never referenced by a dynamic object, in which case we
1021 don't need to generate a procedure linkage table entry
1022 after all. */
ec338859 1023
a85d7ed0 1024 /* If this is a local symbol, we resolve it directly without
947216bf 1025 creating a procedure linkage table entry. */
5236c819
MS		 1026 if (h != NULL)
1027 {
f5385ebf 1028 h->needs_plt = 1;
5236c819
MS		 1029 h->plt.refcount += 1;
1030 }
1031 break;
ec338859 1032
5236c819
MS		 1033 case R_390_GOTPLT12:
1034 case R_390_GOTPLT16:
bd1ea41b 1035 case R_390_GOTPLT20:
5236c819
MS		 1036 case R_390_GOTPLT32:
1037 case R_390_GOTPLT64:
1038 case R_390_GOTPLTENT:
1039 /* This symbol requires either a procedure linkage table entry
1040 or an entry in the local got. We actually build the entry
1041 in adjust_dynamic_symbol because whether this is really a
1042 global reference can change and with it the fact if we have
1043 to create a plt entry or a local got entry. To be able to
1044 make a once global symbol a local one we have to keep track
1045 of the number of gotplt references that exist for this
1046 symbol. */
1047 if (h != NULL)
1048 {
1049 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
f5385ebf 1050 h->needs_plt = 1;
5236c819
MS		 1051 h->plt.refcount += 1;
1052 }
69fc87f1
MS		 1053 else
1054 local_got_refcounts[r_symndx] += 1;
1055 break;
1056
1057 case R_390_TLS_LDM64:
1058 htab->tls_ldm_got.refcount += 1;
1059 break;
1060
1061 case R_390_TLS_IE64:
1062 case R_390_TLS_GOTIE12:
bd1ea41b 1063 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1064 case R_390_TLS_GOTIE64:
1065 case R_390_TLS_IEENT:
0e1862bb 1066 if (bfd_link_pic (info))
69fc87f1
MS		 1067 info->flags |= DF_STATIC_TLS;
1068 /* Fall through */
1069
1070 case R_390_GOT12:
26e41594 1071 case R_390_GOT16:
bd1ea41b 1072 case R_390_GOT20:
69fc87f1
MS		 1073 case R_390_GOT32:
1074 case R_390_GOT64:
1075 case R_390_GOTENT:
1076 case R_390_TLS_GD64:
1077 /* This symbol requires a global offset table entry. */
1078 switch (r_type)
1079 {
1080 default:
1081 case R_390_GOT12:
1082 case R_390_GOT16:
bd1ea41b 1083 case R_390_GOT20:
69fc87f1
MS		 1084 case R_390_GOT32:
1085 case R_390_GOTENT:
1086 tls_type = GOT_NORMAL;
1087 break;
1088 case R_390_TLS_GD64:
1089 tls_type = GOT_TLS_GD;
1090 break;
1091 case R_390_TLS_IE64:
1092 case R_390_TLS_GOTIE64:
1093 tls_type = GOT_TLS_IE;
1094 break;
1095 case R_390_TLS_GOTIE12:
bd1ea41b 1096 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1097 case R_390_TLS_IEENT:
1098 tls_type = GOT_TLS_IE_NLT;
1099 break;
1100 }
1101
1102 if (h != NULL)
1103 {
1104 h->got.refcount += 1;
1105 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1106 }
5236c819
MS		 1107 else
1108 {
1109 local_got_refcounts[r_symndx] += 1;
69fc87f1 1110 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
5236c819 1111 }
69fc87f1
MS		 1112 /* If a TLS symbol is accessed using IE at least once,
1113 there is no point to use dynamic model for it. */
1114 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1115 {
1116 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1117 {
4eca0228 1118 _bfd_error_handler
695344c0 1119 /* xgettext:c-format */
871b3ab2 1120 (_("%pB: `%s' accessed both as normal and thread local symbol"),
d003868e 1121 abfd, h->root.root.string);
69fc87f1
MS		 1122 return FALSE;
1123 }
1124 if (old_tls_type > tls_type)
1125 tls_type = old_tls_type;
1126 }
1127
1128 if (old_tls_type != tls_type)
1129 {
1130 if (h != NULL)
1131 elf_s390_hash_entry (h)->tls_type = tls_type;
1132 else
1133 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1134 }
1135
1136 if (r_type != R_390_TLS_IE64)
1137 break;
1138 /* Fall through */
1139
1140 case R_390_TLS_LE64:
e00d879a
AK		 1141 /* For static linking and executables this reloc will be
1142 calculated at linktime otherwise a TLS_TPOFF runtime
1143 reloc will be generated. */
0e1862bb 1144 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
e00d879a
AK		 1145 break;
1146
0e1862bb 1147 if (!bfd_link_pic (info))
69fc87f1
MS		 1148 break;
1149 info->flags |= DF_STATIC_TLS;
1150 /* Fall through */
ec338859 1151
947216bf
AM		 1152 case R_390_8:
1153 case R_390_16:
a85d7ed0
NC		 1154 case R_390_32:
1155 case R_390_64:
fb798c50 1156 case R_390_PC12DBL:
947216bf
AM		 1157 case R_390_PC16:
1158 case R_390_PC16DBL:
fb798c50 1159 case R_390_PC24DBL:
a85d7ed0
NC		 1160 case R_390_PC32:
1161 case R_390_PC32DBL:
1162 case R_390_PC64:
99ba5125 1163 if (h != NULL && bfd_link_executable (info))
0451c93c
MS		 1164 {
1165 /* If this reloc is in a read-only section, we might
1166 need a copy reloc. We can't check reliably at this
1167 stage whether the section is read-only, as input
1168 sections have not yet been mapped to output sections.
1169 Tentatively set the flag for now, and correct in
1170 adjust_dynamic_symbol. */
f5385ebf 1171 h->non_got_ref = 1;
ec338859 1172
0e1862bb 1173 if (!bfd_link_pic (info))
470b557a
AK		 1174 {
1175 /* We may need a .plt entry if the function this reloc
1176 refers to is in a shared lib. */
1177 h->plt.refcount += 1;
1178 }
0451c93c 1179 }
ec338859 1180
a85d7ed0 1181 /* If we are creating a shared library, and this is a reloc
0451c93c
MS		 1182 against a global symbol, or a non PC relative reloc
1183 against a local symbol, then we need to copy the reloc
1184 into the shared library. However, if we are linking with
1185 -Bsymbolic, we do not need to copy a reloc against a
1186 global symbol which is defined in an object we are
1187 including in the link (i.e., DEF_REGULAR is set). At
1188 this point we have not seen all the input files, so it is
1189 possible that DEF_REGULAR is not set now but will be set
1190 later (it is never cleared). In case of a weak definition,
1191 DEF_REGULAR may be cleared later by a strong definition in
1192 a shared library. We account for that possibility below by
1193 storing information in the relocs_copied field of the hash
1194 table entry. A similar situation occurs when creating
1195 shared libraries and symbol visibility changes render the
1196 symbol local.
1197
1198 If on the other hand, we are creating an executable, we
1199 may need to keep relocations for symbols satisfied by a
1200 dynamic library if we manage to avoid copy relocs for the
1201 symbol. */
0e1862bb 1202 if ((bfd_link_pic (info)
0451c93c
MS		 1203 && (sec->flags & SEC_ALLOC) != 0
1204 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
fb798c50 1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
0451c93c 1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
fb798c50 1207 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
0451c93c
MS		 1208 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1209 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1210 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1211 || (h != NULL
8c21ca21 1212 && (! SYMBOLIC_BIND (info, h)
0451c93c 1213 || h->root.type == bfd_link_hash_defweak
f5385ebf 1214 || !h->def_regular))))
64285810 1215 || (ELIMINATE_COPY_RELOCS
0e1862bb 1216 && !bfd_link_pic (info)
0451c93c
MS		 1217 && (sec->flags & SEC_ALLOC) != 0
1218 && h != NULL
1219 && (h->root.type == bfd_link_hash_defweak
f5385ebf 1220 || !h->def_regular)))
a85d7ed0 1221 {
00d8c7a9
AK		 1222 struct elf_dyn_relocs *p;
1223 struct elf_dyn_relocs **head;
ec338859 1224
0451c93c
MS		 1225 /* We must copy these reloc types into the output file.
1226 Create a reloc section in dynobj and make room for
1227 this reloc. */
a85d7ed0
NC		 1228 if (sreloc == NULL)
1229 {
440e9cd2
AK		 1230 if (htab->elf.dynobj == NULL)
1231 htab->elf.dynobj = abfd;
1232
83bac4b0
NC		 1233 sreloc = _bfd_elf_make_dynamic_reloc_section
1234 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
ec338859 1235
a85d7ed0 1236 if (sreloc == NULL)
83bac4b0 1237 return FALSE;
a85d7ed0 1238 }
ec338859 1239
0451c93c
MS		 1240 /* If this is a global symbol, we count the number of
1241 relocations we need for this symbol. */
1242 if (h != NULL)
a85d7ed0 1243 {
ec338859 1244 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
0451c93c
MS		 1245 }
1246 else
1247 {
ec338859
AM		 1248 /* Track dynamic relocs needed for local syms too.
1249 We really need local syms available to do this
1250 easily. Oh well. */
ec338859 1251 asection *s;
6edfbbad
DJ		 1252 void *vpp;
1253
87d72d41
AM		 1254 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1255 abfd, r_symndx);
1256 if (isym == NULL)
b34976b6 1257 return FALSE;
ec338859 1258
87d72d41
AM		 1259 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1260 if (s == NULL)
1261 s = sec;
1262
6edfbbad 1263 vpp = &elf_section_data (s)->local_dynrel;
00d8c7a9 1264 head = (struct elf_dyn_relocs **) vpp;
ec338859
AM		 1265 }
1266
1267 p = *head;
1268 if (p == NULL || p->sec != sec)
1269 {
1270 bfd_size_type amt = sizeof *p;
00d8c7a9 1271 p = ((struct elf_dyn_relocs *)
ec338859
AM		 1272 bfd_alloc (htab->elf.dynobj, amt));
1273 if (p == NULL)
b34976b6 1274 return FALSE;
ec338859
AM		 1275 p->next = *head;
1276 *head = p;
1277 p->sec = sec;
1278 p->count = 0;
1279 p->pc_count = 0;
a85d7ed0 1280 }
ec338859
AM		 1281
1282 p->count += 1;
1283 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
fb798c50
AK		 1284 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1285 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
ec338859
AM		 1286 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1287 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1288 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1289 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1290 p->pc_count += 1;
a85d7ed0 1291 }
a85d7ed0 1292 break;
ec338859 1293
a85d7ed0
NC		 1294 /* This relocation describes the C++ object vtable hierarchy.
1295 Reconstruct it for later use during GC. */
947216bf 1296 case R_390_GNU_VTINHERIT:
c152c796 1297 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 1298 return FALSE;
947216bf 1299 break;
ec338859 1300
a85d7ed0
NC		 1301 /* This relocation describes which C++ vtable entries are actually
1302 used. Record for later use during GC. */
947216bf 1303 case R_390_GNU_VTENTRY:
d17e0c6e
JB		 1304 BFD_ASSERT (h != NULL);
1305 if (h != NULL
1306 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 1307 return FALSE;
947216bf 1308 break;
ec338859 1309
a85d7ed0
NC		 1310 default:
1311 break;
1312 }
1313 }
1314
b34976b6 1315 return TRUE;
a85d7ed0
NC		 1316}
1317
1318/* Return the section that should be marked against GC for a given
1319 relocation. */
1320
1321static asection *
07adf181
AM		 1322elf_s390_gc_mark_hook (asection *sec,
1323 struct bfd_link_info *info,
1324 Elf_Internal_Rela *rel,
1325 struct elf_link_hash_entry *h,
1326 Elf_Internal_Sym *sym)
a85d7ed0
NC		 1327{
1328 if (h != NULL)
07adf181
AM		 1329 switch (ELF64_R_TYPE (rel->r_info))
1330 {
1331 case R_390_GNU_VTINHERIT:
1332 case R_390_GNU_VTENTRY:
1333 return NULL;
1334 }
1335
1336 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
a85d7ed0
NC		 1337}
1338
5236c819
MS		 1339/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1340 entry but we found we will not create any. Called when we find we will
1341 not have any PLT for this symbol, by for example
1342 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1343 or elf_s390_size_dynamic_sections if no dynamic sections will be
1344 created (we're only linking static objects). */
1345
1346static void
2c3fc389 1347elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
5236c819
MS		 1348{
1349 if (h->elf.root.type == bfd_link_hash_warning)
1350 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1351
1352 if (h->gotplt_refcount <= 0)
1353 return;
1354
1355 /* We simply add the number of gotplt references to the number
1356 * of got references for this symbol. */
1357 h->elf.got.refcount += h->gotplt_refcount;
1358 h->gotplt_refcount = -1;
1359}
1360
63c1f59d
AM		 1361/* Find dynamic relocs for H that apply to read-only sections. */
1362
1363static asection *
1364readonly_dynrelocs (struct elf_link_hash_entry *h)
1365{
1366 struct elf_dyn_relocs *p;
1367
1368 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1369 {
1370 asection *s = p->sec->output_section;
1371
1372 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1373 return p->sec;
1374 }
1375 return NULL;
1376}
1377
a85d7ed0
NC		 1378/* Adjust a symbol defined by a dynamic object and referenced by a
1379 regular object. The current definition is in some section of the
1380 dynamic object, but we're not including those sections. We have to
1381 change the definition to something the rest of the link can
1382 understand. */
1383
b34976b6 1384static bfd_boolean
4dfe6ac6
NC		 1385elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1386 struct elf_link_hash_entry *h)
a85d7ed0 1387{
0451c93c 1388 struct elf_s390_link_hash_table *htab;
5474d94f 1389 asection *s, *srel;
a85d7ed0 1390
470b557a
AK		 1391 /* STT_GNU_IFUNC symbol must go through PLT. */
1392 if (s390_is_ifunc_symbol_p (h))
d8ee9e44
AK		 1393 {
1394 /* All local STT_GNU_IFUNC references must be treated as local
1395 calls via local PLT. */
1396 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1397 {
1398 bfd_size_type pc_count = 0, count = 0;
1399 struct elf_dyn_relocs **pp;
1400 struct elf_s390_link_hash_entry *eh;
1401 struct elf_dyn_relocs *p;
1402
1403 eh = (struct elf_s390_link_hash_entry *) h;
1404 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1405 {
1406 pc_count += p->pc_count;
1407 p->count -= p->pc_count;
1408 p->pc_count = 0;
1409 count += p->count;
1410 if (p->count == 0)
1411 *pp = p->next;
1412 else
1413 pp = &p->next;
1414 }
1415
1416 if (pc_count || count)
1417 {
1418 h->needs_plt = 1;
1419 h->non_got_ref = 1;
1420 if (h->plt.refcount <= 0)
1421 h->plt.refcount = 1;
1422 else
1423 h->plt.refcount += 1;
1424 }
1425 }
1426
1427 if (h->plt.refcount <= 0)
1428 {
1429 h->plt.offset = (bfd_vma) -1;
1430 h->needs_plt = 0;
1431 }
1432 return TRUE;
1433 }
470b557a 1434
a85d7ed0
NC		 1435 /* If this is a function, put it in the procedure linkage table. We
1436 will fill in the contents of the procedure linkage table later
cedb70c5 1437 (although we could actually do it here). */
a85d7ed0 1438 if (h->type == STT_FUNC
f5385ebf 1439 || h->needs_plt)
a85d7ed0 1440 {
0451c93c 1441 if (h->plt.refcount <= 0
8c21ca21 1442 || SYMBOL_CALLS_LOCAL (info, h)
10e7c045 1443 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
a85d7ed0
NC		 1444 {
1445 /* This case can occur if we saw a PLT32 reloc in an input
947216bf
AM		 1446 file, but the symbol was never referred to by a dynamic
1447 object, or if all references were garbage collected. In
0451c93c
MS		 1448 such a case, we don't actually need to build a procedure
1449 linkage table, and we can just do a PC32 reloc instead. */
a85d7ed0 1450 h->plt.offset = (bfd_vma) -1;
f5385ebf 1451 h->needs_plt = 0;
5236c819 1452 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
a85d7ed0
NC		 1453 }
1454
b34976b6 1455 return TRUE;
a85d7ed0 1456 }
bbd7ec4a 1457 else
0451c93c
MS		 1458 /* It's possible that we incorrectly decided a .plt reloc was
1459 needed for an R_390_PC32 reloc to a non-function sym in
1460 check_relocs. We can't decide accurately between function and
1461 non-function syms in check-relocs; Objects loaded later in
1462 the link may change h->type. So fix it now. */
bbd7ec4a 1463 h->plt.offset = (bfd_vma) -1;
a85d7ed0
NC		 1464
1465 /* If this is a weak symbol, and there is a real definition, the
1466 processor independent code will have arranged for us to see the
1467 real definition first, and we can just use the same value. */
60d67dc8 1468 if (h->is_weakalias)
a85d7ed0 1469 {
60d67dc8
AM		 1470 struct elf_link_hash_entry *def = weakdef (h);
1471 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1472 h->root.u.def.section = def->root.u.def.section;
1473 h->root.u.def.value = def->root.u.def.value;
64285810 1474 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
60d67dc8 1475 h->non_got_ref = def->non_got_ref;
b34976b6 1476 return TRUE;
a85d7ed0
NC		 1477 }
1478
1479 /* This is a reference to a symbol defined by a dynamic object which
1480 is not a function. */
1481
1482 /* If we are creating a shared library, we must presume that the
1483 only references to the symbol are via the global offset table.
1484 For such cases we need not do anything here; the relocations will
1485 be handled correctly by relocate_section. */
0e1862bb 1486 if (bfd_link_pic (info))
b34976b6 1487 return TRUE;
a85d7ed0
NC		 1488
1489 /* If there are no references to this symbol that do not use the
1490 GOT, we don't need to generate a copy reloc. */
f5385ebf 1491 if (!h->non_got_ref)
b34976b6 1492 return TRUE;
a85d7ed0 1493
0451c93c
MS		 1494 /* If -z nocopyreloc was given, we won't generate them either. */
1495 if (info->nocopyreloc)
1496 {
f5385ebf 1497 h->non_got_ref = 0;
b34976b6 1498 return TRUE;
0451c93c
MS		 1499 }
1500
3bf083ed
AM		 1501 /* If we don't find any dynamic relocs in read-only sections, then
1502 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1503 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
0451c93c 1504 {
3bf083ed
AM		 1505 h->non_got_ref = 0;
1506 return TRUE;
0451c93c
MS		 1507 }
1508
a85d7ed0
NC		 1509 /* We must allocate the symbol in our .dynbss section, which will
1510 become part of the .bss section of the executable. There will be
1511 an entry for this symbol in the .dynsym section. The dynamic
1512 object will contain position independent code, so all references
1513 from the dynamic object to this symbol will go through the global
1514 offset table. The dynamic linker will use the .dynsym entry to
1515 determine the address it must put in the global offset table, so
1516 both the dynamic object and the regular object will refer to the
1517 same memory location for the variable. */
1518
0451c93c 1519 htab = elf_s390_hash_table (info);
4dfe6ac6
NC		 1520 if (htab == NULL)
1521 return FALSE;
a85d7ed0 1522
0451c93c
MS		 1523 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1524 copy the initial value out of the dynamic object and into the
1525 runtime process image. */
5474d94f
AM		 1526 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1527 {
1528 s = htab->elf.sdynrelro;
1529 srel = htab->elf.sreldynrelro;
1530 }
1531 else
1532 {
1533 s = htab->elf.sdynbss;
1534 srel = htab->elf.srelbss;
1535 }
1d7e9d18 1536 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
a85d7ed0 1537 {
5474d94f 1538 srel->size += sizeof (Elf64_External_Rela);
f5385ebf 1539 h->needs_copy = 1;
a85d7ed0
NC		 1540 }
1541
6cabe1ea 1542 return _bfd_elf_adjust_dynamic_copy (info, h, s);
a85d7ed0
NC		 1543}
1544
0451c93c
MS		 1545/* Allocate space in .plt, .got and associated reloc sections for
1546 dynamic relocs. */
1547
b34976b6 1548static bfd_boolean
4dfe6ac6
NC		 1549allocate_dynrelocs (struct elf_link_hash_entry *h,
1550 void * inf)
0451c93c
MS		 1551{
1552 struct bfd_link_info *info;
1553 struct elf_s390_link_hash_table *htab;
470b557a 1554 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
00d8c7a9 1555 struct elf_dyn_relocs *p;
0451c93c 1556
e92d460e 1557 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1558 return TRUE;
0451c93c
MS		 1559
1560 info = (struct bfd_link_info *) inf;
1561 htab = elf_s390_hash_table (info);
4dfe6ac6
NC		 1562 if (htab == NULL)
1563 return FALSE;
0451c93c 1564
470b557a
AK		 1565 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1566 here if it is defined and referenced in a non-shared object. */
1567 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
61643fba 1568 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
470b557a
AK		 1569 else if (htab->elf.dynamic_sections_created
1570 && h->plt.refcount > 0)
0451c93c
MS		 1571 {
1572 /* Make sure this symbol is output as a dynamic symbol.
1573 Undefined weak syms won't yet be marked as dynamic. */
1574 if (h->dynindx == -1
f5385ebf 1575 && !h->forced_local)
0451c93c 1576 {
c152c796 1577 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1578 return FALSE;
0451c93c
MS		 1579 }
1580
0e1862bb 1581 if (bfd_link_pic (info)
4ec72bde 1582 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
0451c93c 1583 {
f41345a7 1584 asection *s = htab->elf.splt;
0451c93c
MS		 1585
1586 /* If this is the first .plt entry, make room for the special
1587 first entry. */
eea6121a
AM		 1588 if (s->size == 0)
1589 s->size += PLT_FIRST_ENTRY_SIZE;
0451c93c 1590
eea6121a 1591 h->plt.offset = s->size;
0451c93c
MS		 1592
1593 /* If this symbol is not defined in a regular file, and we are
1594 not generating a shared library, then set the symbol to this
1595 location in the .plt. This is required to make function
1596 pointers compare as equal between the normal executable and
1597 the shared library. */
0e1862bb 1598 if (! bfd_link_pic (info)
f5385ebf 1599 && !h->def_regular)
0451c93c
MS		 1600 {
1601 h->root.u.def.section = s;
1602 h->root.u.def.value = h->plt.offset;
1603 }
ec338859 1604
0451c93c 1605 /* Make room for this entry. */
eea6121a 1606 s->size += PLT_ENTRY_SIZE;
ec338859 1607
afca762f 1608 /* We also need to make an entry in the .got.plt section. */
f41345a7 1609 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
0451c93c
MS		 1610
1611 /* We also need to make an entry in the .rela.plt section. */
f41345a7 1612 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
0451c93c
MS		 1613 }
1614 else
1615 {
1616 h->plt.offset = (bfd_vma) -1;
f5385ebf 1617 h->needs_plt = 0;
5236c819 1618 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1619 }
1620 }
1621 else
1622 {
1623 h->plt.offset = (bfd_vma) -1;
f5385ebf 1624 h->needs_plt = 0;
5236c819 1625 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1626 }
1627
69fc87f1
MS		 1628 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1629 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1630 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1631 we can save the dynamic TLS relocation. */
1632 if (h->got.refcount > 0
0e1862bb 1633 && !bfd_link_pic (info)
69fc87f1
MS		 1634 && h->dynindx == -1
1635 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1636 {
1637 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1638 /* For the GOTIE access without a literal pool entry the offset has
1639 to be stored somewhere. The immediate value in the instruction
1640 is not bit enough so the value is stored in the got. */
1641 {
f41345a7
AK		 1642 h->got.offset = htab->elf.sgot->size;
1643 htab->elf.sgot->size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1644 }
1645 else
1646 h->got.offset = (bfd_vma) -1;
1647 }
1648 else if (h->got.refcount > 0)
0451c93c
MS		 1649 {
1650 asection *s;
b34976b6 1651 bfd_boolean dyn;
69fc87f1 1652 int tls_type = elf_s390_hash_entry(h)->tls_type;
0451c93c
MS		 1653
1654 /* Make sure this symbol is output as a dynamic symbol.
1655 Undefined weak syms won't yet be marked as dynamic. */
1656 if (h->dynindx == -1
f5385ebf 1657 && !h->forced_local)
0451c93c 1658 {
c152c796 1659 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1660 return FALSE;
0451c93c
MS		 1661 }
1662
f41345a7 1663 s = htab->elf.sgot;
eea6121a
AM		 1664 h->got.offset = s->size;
1665 s->size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1666 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1667 if (tls_type == GOT_TLS_GD)
eea6121a 1668 s->size += GOT_ENTRY_SIZE;
0451c93c 1669 dyn = htab->elf.dynamic_sections_created;
69fc87f1
MS		 1670 /* R_390_TLS_IE64 needs one dynamic relocation,
1671 R_390_TLS_GD64 needs one if local symbol and two if global. */
1672 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1673 || tls_type >= GOT_TLS_IE)
f41345a7 1674 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
69fc87f1 1675 else if (tls_type == GOT_TLS_GD)
f41345a7 1676 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
10e7c045 1677 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
0e1862bb 1678 && (bfd_link_pic (info)
82058a73 1679 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
f41345a7 1680 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
0451c93c
MS		 1681 }
1682 else
1683 h->got.offset = (bfd_vma) -1;
1684
0451c93c 1685 if (eh->dyn_relocs == NULL)
b34976b6 1686 return TRUE;
0451c93c
MS		 1687
1688 /* In the shared -Bsymbolic case, discard space allocated for
1689 dynamic pc-relative relocs against symbols which turn out to be
1690 defined in regular objects. For the normal shared case, discard
1691 space for pc-relative relocs that have become local due to symbol
1692 visibility changes. */
1693
0e1862bb 1694 if (bfd_link_pic (info))
0451c93c 1695 {
8c21ca21 1696 if (SYMBOL_CALLS_LOCAL (info, h))
0451c93c 1697 {
00d8c7a9 1698 struct elf_dyn_relocs **pp;
0451c93c
MS		 1699
1700 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1701 {
1702 p->count -= p->pc_count;
1703 p->pc_count = 0;
1704 if (p->count == 0)
1705 *pp = p->next;
1706 else
1707 pp = &p->next;
1708 }
1709 }
82058a73
MS		 1710
1711 /* Also discard relocs on undefined weak syms with non-default
1712 visibility. */
22d606e9 1713 if (eh->dyn_relocs != NULL
82058a73 1714 && h->root.type == bfd_link_hash_undefweak)
22d606e9 1715 {
b27bb18f
L		 1716 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1717 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
22d606e9
AM		 1718 eh->dyn_relocs = NULL;
1719
1720 /* Make sure undefined weak symbols are output as a dynamic
1721 symbol in PIEs. */
1722 else if (h->dynindx == -1
1723 && !h->forced_local)
1724 {
1725 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1726 return FALSE;
1727 }
1728 }
0451c93c 1729 }
64285810 1730 else if (ELIMINATE_COPY_RELOCS)
0451c93c
MS		 1731 {
1732 /* For the non-shared case, discard space for relocs against
1733 symbols which turn out to need copy relocs or are not
1734 dynamic. */
1735
f5385ebf
AM		 1736 if (!h->non_got_ref
1737 && ((h->def_dynamic
1738 && !h->def_regular)
0451c93c
MS		 1739 || (htab->elf.dynamic_sections_created
1740 && (h->root.type == bfd_link_hash_undefweak
1741 || h->root.type == bfd_link_hash_undefined))))
1742 {
1743 /* Make sure this symbol is output as a dynamic symbol.
1744 Undefined weak syms won't yet be marked as dynamic. */
1745 if (h->dynindx == -1
f5385ebf 1746 && !h->forced_local)
0451c93c 1747 {
c152c796 1748 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1749 return FALSE;
0451c93c
MS		 1750 }
1751
1752 /* If that succeeded, we know we'll be keeping all the
1753 relocs. */
1754 if (h->dynindx != -1)
1755 goto keep;
1756 }
1757
1758 eh->dyn_relocs = NULL;
1759
ec338859 1760 keep: ;
0451c93c
MS		 1761 }
1762
1763 /* Finally, allocate space. */
1764 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1765 {
1766 asection *sreloc = elf_section_data (p->sec)->sreloc;
eea6121a 1767 sreloc->size += p->count * sizeof (Elf64_External_Rela);
0451c93c
MS		 1768 }
1769
b34976b6 1770 return TRUE;
0451c93c
MS		 1771}
1772
63c1f59d
AM		 1773/* Set DF_TEXTREL if we find any dynamic relocs that apply to
1774 read-only sections. */
0451c93c 1775
b34976b6 1776static bfd_boolean
63c1f59d 1777maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
0451c93c 1778{
63c1f59d 1779 asection *sec;
0451c93c 1780
63c1f59d
AM		 1781 if (h->root.type == bfd_link_hash_indirect)
1782 return TRUE;
0451c93c 1783
63c1f59d
AM		 1784 sec = readonly_dynrelocs (h);
1785 if (sec != NULL)
1786 {
1787 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
0451c93c 1788
63c1f59d
AM		 1789 info->flags |= DF_TEXTREL;
1790 info->callbacks->minfo
c1c8c1ef 1791 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
63c1f59d 1792 sec->owner, h->root.root.string, sec);
0451c93c 1793
63c1f59d
AM		 1794 /* Not an error, just cut short the traversal. */
1795 return FALSE;
0451c93c 1796 }
b34976b6 1797 return TRUE;
0451c93c
MS		 1798}
1799
a85d7ed0
NC		 1800/* Set the sizes of the dynamic sections. */
1801
b34976b6 1802static bfd_boolean
4dfe6ac6
NC		 1803elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1804 struct bfd_link_info *info)
a85d7ed0 1805{
0451c93c 1806 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1807 bfd *dynobj;
1808 asection *s;
b34976b6 1809 bfd_boolean relocs;
0451c93c 1810 bfd *ibfd;
a85d7ed0 1811
0451c93c 1812 htab = elf_s390_hash_table (info);
4dfe6ac6
NC		 1813 if (htab == NULL)
1814 return FALSE;
1815
0451c93c
MS		 1816 dynobj = htab->elf.dynobj;
1817 if (dynobj == NULL)
1818 abort ();
a85d7ed0 1819
0451c93c 1820 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 1821 {
1822 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 1823 if (bfd_link_executable (info) && !info->nointerp)
a85d7ed0 1824 {
3d4d4302 1825 s = bfd_get_linker_section (dynobj, ".interp");
0451c93c
MS		 1826 if (s == NULL)
1827 abort ();
eea6121a 1828 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
a85d7ed0
NC		 1829 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1830 }
1831 }
a85d7ed0 1832
afca762f
AK		 1833 if (htab->elf.sgot && s390_gotplt_after_got_p (info))
1834 {
1835 /* _bfd_elf_create_got_section adds the got header size always
1836 to .got.plt but we need it in .got if this section comes
1837 first. */
1838 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
1839 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
1840
1841 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1842 instead of .got.plt. */
1843 htab->elf.hgot->root.u.def.section = htab->elf.sgot;
1844 htab->elf.hgot->root.u.def.value = 0;
1845 }
1846
0451c93c
MS		 1847 /* Set up .got offsets for local syms, and space for local dynamic
1848 relocs. */
c72f2fb2 1849 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
a85d7ed0 1850 {
0451c93c
MS		 1851 bfd_signed_vma *local_got;
1852 bfd_signed_vma *end_local_got;
69fc87f1 1853 char *local_tls_type;
0451c93c
MS		 1854 bfd_size_type locsymcount;
1855 Elf_Internal_Shdr *symtab_hdr;
1856 asection *srela;
470b557a
AK		 1857 struct plt_entry *local_plt;
1858 unsigned int i;
a85d7ed0 1859
0ffa91dd 1860 if (! is_s390_elf (ibfd))
a85d7ed0
NC		 1861 continue;
1862
0451c93c 1863 for (s = ibfd->sections; s != NULL; s = s->next)
a85d7ed0 1864 {
00d8c7a9 1865 struct elf_dyn_relocs *p;
0451c93c 1866
6edfbbad 1867 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
a85d7ed0 1868 {
ec338859
AM		 1869 if (!bfd_is_abs_section (p->sec)
1870 && bfd_is_abs_section (p->sec->output_section))
1871 {
1872 /* Input section has been discarded, either because
1873 it is a copy of a linkonce section or due to
1874 linker script /DISCARD/, so we'll be discarding
1875 the relocs too. */
1876 }
248866a8 1877 else if (p->count != 0)
ec338859
AM		 1878 {
1879 srela = elf_section_data (p->sec)->sreloc;
eea6121a 1880 srela->size += p->count * sizeof (Elf64_External_Rela);
248866a8
AM		 1881 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1882 info->flags |= DF_TEXTREL;
ec338859 1883 }
a85d7ed0
NC		 1884 }
1885 }
0451c93c
MS		 1886
1887 local_got = elf_local_got_refcounts (ibfd);
1888 if (!local_got)
1889 continue;
1890
0ffa91dd 1891 symtab_hdr = &elf_symtab_hdr (ibfd);
0451c93c
MS		 1892 locsymcount = symtab_hdr->sh_info;
1893 end_local_got = local_got + locsymcount;
69fc87f1 1894 local_tls_type = elf_s390_local_got_tls_type (ibfd);
f41345a7
AK		 1895 s = htab->elf.sgot;
1896 srela = htab->elf.srelgot;
69fc87f1 1897 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
a85d7ed0 1898 {
0451c93c 1899 if (*local_got > 0)
a85d7ed0 1900 {
eea6121a
AM		 1901 *local_got = s->size;
1902 s->size += GOT_ENTRY_SIZE;
69fc87f1 1903 if (*local_tls_type == GOT_TLS_GD)
eea6121a 1904 s->size += GOT_ENTRY_SIZE;
0e1862bb 1905 if (bfd_link_pic (info))
eea6121a 1906 srela->size += sizeof (Elf64_External_Rela);
a85d7ed0
NC		 1907 }
1908 else
0451c93c 1909 *local_got = (bfd_vma) -1;
a85d7ed0 1910 }
470b557a
AK		 1911
1912 local_plt = elf_s390_local_plt (ibfd);
1913 for (i = 0; i < symtab_hdr->sh_info; i++)
1914 {
1915 if (local_plt[i].plt.refcount > 0)
1916 {
1917 local_plt[i].plt.offset = htab->elf.iplt->size;
1918 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1919 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1920 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1921 }
1922 else
1923 local_plt[i].plt.offset = (bfd_vma) -1;
1924 }
0451c93c
MS		 1925 }
1926
69fc87f1
MS		 1927 if (htab->tls_ldm_got.refcount > 0)
1928 {
1929 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1930 relocs. */
f41345a7
AK		 1931 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1932 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1933 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
69fc87f1
MS		 1934 }
1935 else
1936 htab->tls_ldm_got.offset = -1;
1937
0451c93c
MS		 1938 /* Allocate global sym .plt and .got entries, and space for global
1939 sym dynamic relocs. */
2c3fc389 1940 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
0451c93c
MS		 1941
1942 /* We now have determined the sizes of the various dynamic sections.
1943 Allocate memory for them. */
b34976b6 1944 relocs = FALSE;
0451c93c
MS		 1945 for (s = dynobj->sections; s != NULL; s = s->next)
1946 {
1947 if ((s->flags & SEC_LINKER_CREATED) == 0)
1948 continue;
1949
f41345a7
AK		 1950 if (s == htab->elf.splt
1951 || s == htab->elf.sgot
1952 || s == htab->elf.sgotplt
9d19e4fd 1953 || s == htab->elf.sdynbss
5474d94f 1954 || s == htab->elf.sdynrelro
470b557a
AK		 1955 || s == htab->elf.iplt
1956 || s == htab->elf.igotplt
1957 || s == htab->irelifunc)
0451c93c
MS		 1958 {
1959 /* Strip this section if we don't need it; see the
1960 comment below. */
1961 }
0112cd26 1962 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
0451c93c 1963 {
f41345a7 1964 if (s->size != 0 && s != htab->elf.srelplt)
b34976b6 1965 relocs = TRUE;
ec338859 1966
0451c93c
MS		 1967 /* We use the reloc_count field as a counter if we need
1968 to copy relocs into the output file. */
1969 s->reloc_count = 0;
1970 }
1971 else
a85d7ed0
NC		 1972 {
1973 /* It's not one of our sections, so don't allocate space. */
1974 continue;
1975 }
1976
eea6121a 1977 if (s->size == 0)
a85d7ed0 1978 {
0451c93c
MS		 1979 /* If we don't need this section, strip it from the
1980 output file. This is to handle .rela.bss and
1981 .rela.plt. We must create it in
1982 create_dynamic_sections, because it must be created
1983 before the linker maps input sections to output
1984 sections. The linker does that before
1985 adjust_dynamic_symbol is called, and it is that
1986 function which decides whether anything needs to go
1987 into these sections. */
1988
8423293d 1989 s->flags |= SEC_EXCLUDE;
a85d7ed0
NC		 1990 continue;
1991 }
1992
c456f082
AM		 1993 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1994 continue;
1995
0451c93c
MS		 1996 /* Allocate memory for the section contents. We use bfd_zalloc
1997 here in case unused entries are not reclaimed before the
1998 section's contents are written out. This should not happen,
1999 but this way if it does, we get a R_390_NONE reloc instead
2000 of garbage. */
eea6121a 2001 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
0451c93c 2002 if (s->contents == NULL)
b34976b6 2003 return FALSE;
a85d7ed0
NC		 2004 }
2005
0451c93c 2006 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 2007 {
2008 /* Add some entries to the .dynamic section. We fill in the
2009 values later, in elf_s390_finish_dynamic_sections, but we
2010 must add the entries now so that we get the correct size for
2011 the .dynamic section. The DT_DEBUG entry is filled in by the
2012 dynamic linker and used by the debugger. */
dc810e39 2013#define add_dynamic_entry(TAG, VAL) \
5a580b3a 2014 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 2015
0e1862bb 2016 if (bfd_link_executable (info))
a85d7ed0 2017 {
dc810e39 2018 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2019 return FALSE;
a85d7ed0
NC		 2020 }
2021
f41345a7 2022 if (htab->elf.splt->size != 0)
a85d7ed0 2023 {
dc810e39
AM		 2024 if (!add_dynamic_entry (DT_PLTGOT, 0)
2025 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2026 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2027 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 2028 return FALSE;
a85d7ed0
NC		 2029 }
2030
2031 if (relocs)
947216bf
AM		 2032 {
2033 if (!add_dynamic_entry (DT_RELA, 0)
2034 || !add_dynamic_entry (DT_RELASZ, 0)
2035 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
b34976b6 2036 return FALSE;
ec338859 2037
0451c93c
MS		 2038 /* If any dynamic relocs apply to a read-only section,
2039 then we need a DT_TEXTREL entry. */
248866a8 2040 if ((info->flags & DF_TEXTREL) == 0)
63c1f59d 2041 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
ec338859 2042
0451c93c
MS		 2043 if ((info->flags & DF_TEXTREL) != 0)
2044 {
2045 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2046 return FALSE;
0451c93c 2047 }
a85d7ed0
NC		 2048 }
2049 }
dc810e39 2050#undef add_dynamic_entry
a85d7ed0 2051
b34976b6 2052 return TRUE;
a85d7ed0
NC		 2053}
2054
69fc87f1
MS		 2055/* Return the base VMA address which should be subtracted from real addresses
2056 when resolving @dtpoff relocation.
2057 This is PT_TLS segment p_vaddr. */
2058
2059static bfd_vma
2c3fc389 2060dtpoff_base (struct bfd_link_info *info)
69fc87f1 2061{
e1918d23
AM		 2062 /* If tls_sec is NULL, we should have signalled an error already. */
2063 if (elf_hash_table (info)->tls_sec == NULL)
69fc87f1 2064 return 0;
e1918d23 2065 return elf_hash_table (info)->tls_sec->vma;
69fc87f1
MS		 2066}
2067
2068/* Return the relocation value for @tpoff relocation
2069 if STT_TLS virtual address is ADDRESS. */
2070
2071static bfd_vma
2c3fc389 2072tpoff (struct bfd_link_info *info, bfd_vma address)
69fc87f1 2073{
e1918d23 2074 struct elf_link_hash_table *htab = elf_hash_table (info);
69fc87f1 2075
e1918d23
AM		 2076 /* If tls_sec is NULL, we should have signalled an error already. */
2077 if (htab->tls_sec == NULL)
69fc87f1 2078 return 0;
e1918d23 2079 return htab->tls_size + htab->tls_sec->vma - address;
69fc87f1
MS		 2080}
2081
2082/* Complain if TLS instruction relocation is against an invalid
2083 instruction. */
2084
2085static void
2c3fc389
NC		 2086invalid_tls_insn (bfd *input_bfd,
2087 asection *input_section,
2088 Elf_Internal_Rela *rel)
69fc87f1
MS		 2089{
2090 reloc_howto_type *howto;
2091
2092 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
4eca0228 2093 _bfd_error_handler
695344c0 2094 /* xgettext:c-format */
2dcf00ce 2095 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
d003868e
AM		 2096 input_bfd,
2097 input_section,
2dcf00ce 2098 (uint64_t) rel->r_offset,
69fc87f1 2099 howto->name);
77df2968 2100 bfd_set_error (bfd_error_bad_value);
69fc87f1
MS		 2101}
2102
a85d7ed0
NC		 2103/* Relocate a 390 ELF section. */
2104
b34976b6 2105static bfd_boolean
4dfe6ac6
NC		 2106elf_s390_relocate_section (bfd *output_bfd,
2107 struct bfd_link_info *info,
2108 bfd *input_bfd,
2109 asection *input_section,
2110 bfd_byte *contents,
2111 Elf_Internal_Rela *relocs,
2112 Elf_Internal_Sym *local_syms,
2113 asection **local_sections)
a85d7ed0 2114{
0451c93c 2115 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 2116 Elf_Internal_Shdr *symtab_hdr;
2117 struct elf_link_hash_entry **sym_hashes;
2118 bfd_vma *local_got_offsets;
a85d7ed0
NC		 2119 Elf_Internal_Rela *rel;
2120 Elf_Internal_Rela *relend;
2121
0ffa91dd
NC		 2122 BFD_ASSERT (is_s390_elf (input_bfd));
2123
0451c93c 2124 htab = elf_s390_hash_table (info);
4dfe6ac6
NC		 2125 if (htab == NULL)
2126 return FALSE;
2127
0ffa91dd 2128 symtab_hdr = &elf_symtab_hdr (input_bfd);
a85d7ed0
NC		 2129 sym_hashes = elf_sym_hashes (input_bfd);
2130 local_got_offsets = elf_local_got_offsets (input_bfd);
2131
a85d7ed0
NC		 2132 rel = relocs;
2133 relend = relocs + input_section->reloc_count;
2134 for (; rel < relend; rel++)
2135 {
5236c819 2136 unsigned int r_type;
a85d7ed0
NC		 2137 reloc_howto_type *howto;
2138 unsigned long r_symndx;
2139 struct elf_link_hash_entry *h;
2140 Elf_Internal_Sym *sym;
2141 asection *sec;
0451c93c 2142 bfd_vma off;
a85d7ed0 2143 bfd_vma relocation;
b34976b6 2144 bfd_boolean unresolved_reloc;
a85d7ed0 2145 bfd_reloc_status_type r;
69fc87f1 2146 int tls_type;
b27bb18f 2147 bfd_boolean resolved_to_zero;
a85d7ed0
NC		 2148
2149 r_type = ELF64_R_TYPE (rel->r_info);
0451c93c 2150 if (r_type == (int) R_390_GNU_VTINHERIT
947216bf
AM		 2151 || r_type == (int) R_390_GNU_VTENTRY)
2152 continue;
5236c819 2153 if (r_type >= (int) R_390_max)
a85d7ed0
NC		 2154 {
2155 bfd_set_error (bfd_error_bad_value);
b34976b6 2156 return FALSE;
a85d7ed0 2157 }
a85d7ed0 2158
b491616a 2159 howto = elf_howto_table + r_type;
a85d7ed0 2160 r_symndx = ELF64_R_SYM (rel->r_info);
5236c819 2161
a85d7ed0
NC		 2162 h = NULL;
2163 sym = NULL;
2164 sec = NULL;
b34976b6 2165 unresolved_reloc = FALSE;
a85d7ed0
NC		 2166 if (r_symndx < symtab_hdr->sh_info)
2167 {
2168 sym = local_syms + r_symndx;
2169 sec = local_sections[r_symndx];
470b557a
AK		 2170
2171 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2172 {
2173 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2174 if (local_plt == NULL)
2175 return FALSE;
2176
2177 /* Address of the PLT slot. */
2178 relocation = (htab->elf.iplt->output_section->vma
2179 + htab->elf.iplt->output_offset
2180 + local_plt[r_symndx].plt.offset);
2181
2182 switch (r_type)
2183 {
31db78f6
AK		 2184 case R_390_PLTOFF16:
2185 case R_390_PLTOFF32:
2186 case R_390_PLTOFF64:
afca762f 2187 relocation -= s390_got_pointer (info);
31db78f6 2188 break;
470b557a
AK		 2189 case R_390_GOTPLT12:
2190 case R_390_GOTPLT16:
2191 case R_390_GOTPLT20:
2192 case R_390_GOTPLT32:
2193 case R_390_GOTPLT64:
2194 case R_390_GOTPLTENT:
2195 case R_390_GOT12:
2196 case R_390_GOT16:
2197 case R_390_GOT20:
2198 case R_390_GOT32:
2199 case R_390_GOT64:
2200 case R_390_GOTENT:
2201 {
2202 /* Write the PLT slot address into the GOT slot. */
2203 bfd_put_64 (output_bfd, relocation,
2204 htab->elf.sgot->contents +
2205 local_got_offsets[r_symndx]);
2206 relocation = (local_got_offsets[r_symndx] +
afca762f 2207 s390_got_offset (info));
470b557a
AK		 2208
2209 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
afca762f 2210 relocation += s390_got_pointer (info);
470b557a
AK		 2211 break;
2212 }
2213 default:
2214 break;
2215 }
2216 /* The output section is needed later in
2217 finish_dynamic_section when creating the dynamic
2218 relocation. */
2219 local_plt[r_symndx].sec = sec;
2220 goto do_relocation;
2221 }
2222 else
2223 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
a85d7ed0
NC		 2224 }
2225 else
2226 {
560e09e9 2227 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 2228 bfd_boolean ignored ATTRIBUTE_UNUSED;
0451c93c 2229
b2a8e766
AM		 2230 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2231 r_symndx, symtab_hdr, sym_hashes,
2232 h, sec, relocation,
62d887d4 2233 unresolved_reloc, warned, ignored);
a85d7ed0
NC		 2234 }
2235
dbaa2011 2236 if (sec != NULL && discarded_section (sec))
e4067dbb 2237 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 2238 rel, 1, relend, howto, 0, contents);
ab96bf03 2239
0e1862bb 2240 if (bfd_link_relocatable (info))
ab96bf03
AM		 2241 continue;
2242
b27bb18f
L		 2243 resolved_to_zero = (h != NULL
2244 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2245
a85d7ed0
NC		 2246 switch (r_type)
2247 {
5236c819
MS		 2248 case R_390_GOTPLT12:
2249 case R_390_GOTPLT16:
bd1ea41b 2250 case R_390_GOTPLT20:
5236c819
MS		 2251 case R_390_GOTPLT32:
2252 case R_390_GOTPLT64:
2253 case R_390_GOTPLTENT:
2254 /* There are three cases for a GOTPLT relocation. 1) The
2255 relocation is against the jump slot entry of a plt that
2256 will get emitted to the output file. 2) The relocation
2257 is against the jump slot of a plt entry that has been
2258 removed. elf_s390_adjust_gotplt has created a GOT entry
2259 as replacement. 3) The relocation is against a local symbol.
2260 Cases 2) and 3) are the same as the GOT relocation code
2261 so we just have to test for case 1 and fall through for
2262 the other two. */
2263 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2264 {
2265 bfd_vma plt_index;
2266
470b557a
AK		 2267 if (s390_is_ifunc_symbol_p (h))
2268 {
afca762f
AK		 2269 /* Entry indices of .iplt and .igot.plt match
2270 1:1. No magic PLT first entry here. */
470b557a 2271 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
afca762f
AK		 2272 relocation = (plt_index * GOT_ENTRY_SIZE
2273 + s390_gotplt_offset (info)
2274 + htab->elf.igotplt->output_offset);
470b557a
AK		 2275 }
2276 else
2277 {
afca762f
AK		 2278 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
2279 / PLT_ENTRY_SIZE);
2280
2281 relocation = (plt_index * GOT_ENTRY_SIZE
2282 + s390_gotplt_offset (info));
470b557a 2283 }
afca762f
AK		 2284 if (r_type == R_390_GOTPLTENT)
2285 relocation += s390_got_pointer (info);
5236c819 2286 unresolved_reloc = FALSE;
5236c819
MS		 2287 break;
2288 }
2289 /* Fall through. */
2290
947216bf
AM		 2291 case R_390_GOT12:
2292 case R_390_GOT16:
bd1ea41b 2293 case R_390_GOT20:
947216bf
AM		 2294 case R_390_GOT32:
2295 case R_390_GOT64:
2296 case R_390_GOTENT:
2297 /* Relocation is to the entry for this symbol in the global
2298 offset table. */
afca762f 2299 if (htab->elf.sgot == NULL)
0451c93c 2300 abort ();
a85d7ed0 2301
947216bf
AM		 2302 if (h != NULL)
2303 {
b34976b6 2304 bfd_boolean dyn;
a85d7ed0 2305
947216bf 2306 off = h->got.offset;
0451c93c 2307 dyn = htab->elf.dynamic_sections_created;
470b557a
AK		 2308
2309 if (s390_is_ifunc_symbol_p (h))
2310 {
2311 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2312 if (off == (bfd_vma)-1)
2313 {
2314 /* No explicit GOT usage so redirect to the
2315 got.iplt slot. */
afca762f
AK		 2316 relocation = (s390_gotplt_offset (info)
2317 + htab->elf.igotplt->output_offset
2318 + (h->plt.offset / PLT_ENTRY_SIZE
2319 * GOT_ENTRY_SIZE));
2320
2321 /* For @GOTENT the relocation is against the offset between
2322 the instruction and the symbols entry in the GOT and not
2323 between the start of the GOT and the symbols entry. We
2324 add the vma of the GOT to get the correct value. */
2325 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2326 relocation += s390_got_pointer (info);
2327
2328 break;
470b557a
AK		 2329 }
2330 else
2331 {
2332 /* Explicit GOT slots must contain the address
2333 of the PLT slot. This will be handled in
2334 finish_dynamic_symbol. */
2335 }
2336 }
0e1862bb
L		 2337 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2338 bfd_link_pic (info),
2339 h)
2340 || (bfd_link_pic (info)
470b557a 2341 && SYMBOL_REFERENCES_LOCAL (info, h))
10e7c045 2342 || resolved_to_zero)
947216bf 2343 {
e6213e09
AK		 2344 Elf_Internal_Sym *isym;
2345 asection *sym_sec;
2346
947216bf
AM		 2347 /* This is actually a static link, or it is a
2348 -Bsymbolic link and the symbol is defined
2349 locally, or the symbol was forced to be local
2350 because of a version file. We must initialize
2351 this entry in the global offset table. Since the
2352 offset must always be a multiple of 2, we use the
2353 least significant bit to record whether we have
2354 initialized it already.
2355
2356 When doing a dynamic link, we create a .rel.got
2357 relocation entry to initialize the value. This
2358 is done in the finish_dynamic_symbol routine. */
2359 if ((off & 1) != 0)
2360 off &= ~1;
2361 else
2362 {
a85d7ed0 2363 bfd_put_64 (output_bfd, relocation,
afca762f 2364 htab->elf.sgot->contents + off);
947216bf
AM		 2365 h->got.offset |= 1;
2366 }
a63cc5f7 2367
e6213e09
AK		 2368 /* When turning a GOT slot dereference into a direct
2369 reference using larl we have to make sure that
2370 the symbol is 1. properly aligned and 2. it is no
2371 ABS symbol or will become one. */
a63cc5f7 2372 if ((h->def_regular
0e1862bb 2373 && bfd_link_pic (info)
a63cc5f7
AK		 2374 && SYMBOL_REFERENCES_LOCAL (info, h))
2375 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2376 && ((r_type == R_390_GOTENT
2377 && (bfd_get_16 (input_bfd,
2378 contents + rel->r_offset - 2)
2379 & 0xff0f) == 0xc408)
2380 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2381 || (r_type == R_390_GOT20
2382 && (bfd_get_32 (input_bfd,
2383 contents + rel->r_offset - 2)
2384 & 0xff00f000) == 0xe300c000
2385 && bfd_get_8 (input_bfd,
e6213e09
AK		 2386 contents + rel->r_offset + 3) == 0x04))
2387 && (isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2388 input_bfd, r_symndx))
2389 && isym->st_shndx != SHN_ABS
2390 && h != htab->elf.hdynamic
2391 && h != htab->elf.hgot
2392 && h != htab->elf.hplt
2393 && !(isym->st_value & 1)
2394 && (sym_sec = bfd_section_from_elf_index (input_bfd,
2395 isym->st_shndx))
2396 && sym_sec->alignment_power)
a63cc5f7
AK		 2397 {
2398 unsigned short new_insn =
2399 (0xc000 | (bfd_get_8 (input_bfd,
2400 contents + rel->r_offset - 1) & 0xf0));
2401 bfd_put_16 (output_bfd, new_insn,
2402 contents + rel->r_offset - 2);
2403 r_type = R_390_PC32DBL;
2404 rel->r_addend = 2;
2405 howto = elf_howto_table + r_type;
2406 relocation = h->root.u.def.value
2407 + h->root.u.def.section->output_section->vma
2408 + h->root.u.def.section->output_offset;
2409 goto do_relocation;
2410 }
947216bf 2411 }
0451c93c 2412 else
b34976b6 2413 unresolved_reloc = FALSE;
947216bf
AM		 2414 }
2415 else
2416 {
0451c93c
MS		 2417 if (local_got_offsets == NULL)
2418 abort ();
a85d7ed0 2419
947216bf 2420 off = local_got_offsets[r_symndx];
a85d7ed0 2421
947216bf
AM		 2422 /* The offset must always be a multiple of 8. We use
2423 the least significant bit to record whether we have
2424 already generated the necessary reloc. */
2425 if ((off & 1) != 0)
2426 off &= ~1;
2427 else
2428 {
2429 bfd_put_64 (output_bfd, relocation,
f41345a7 2430 htab->elf.sgot->contents + off);
a85d7ed0 2431
0e1862bb 2432 if (bfd_link_pic (info))
947216bf
AM		 2433 {
2434 asection *s;
2435 Elf_Internal_Rela outrel;
2436 bfd_byte *loc;
a85d7ed0 2437
f41345a7 2438 s = htab->elf.srelgot;
947216bf 2439 if (s == NULL)
0451c93c 2440 abort ();
a85d7ed0 2441
f41345a7
AK		 2442 outrel.r_offset = (htab->elf.sgot->output_section->vma
2443 + htab->elf.sgot->output_offset
947216bf
AM		 2444 + off);
2445 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
a85d7ed0 2446 outrel.r_addend = relocation;
947216bf
AM		 2447 loc = s->contents;
2448 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2449 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2450 }
a85d7ed0 2451
947216bf
AM		 2452 local_got_offsets[r_symndx] |= 1;
2453 }
2454 }
a85d7ed0 2455
0451c93c
MS		 2456 if (off >= (bfd_vma) -2)
2457 abort ();
2458
afca762f 2459 relocation = s390_got_offset (info) + off;
0451c93c 2460
ae9a127f
NC		 2461 /* For @GOTENT the relocation is against the offset between
2462 the instruction and the symbols entry in the GOT and not
2463 between the start of the GOT and the symbols entry. We
2464 add the vma of the GOT to get the correct value. */
5236c819
MS		 2465 if ( r_type == R_390_GOTENT
2466 || r_type == R_390_GOTPLTENT)
afca762f 2467 relocation += s390_got_pointer (info);
a85d7ed0 2468
947216bf 2469 break;
99c79b2e 2470
5236c819
MS		 2471 case R_390_GOTOFF16:
2472 case R_390_GOTOFF32:
2473 case R_390_GOTOFF64:
947216bf
AM		 2474 /* Relocation is relative to the start of the global offset
2475 table. */
a85d7ed0 2476
d47b13e0
AK		 2477 if (h != NULL
2478 && s390_is_ifunc_symbol_p (h)
2479 && h->def_regular
2480 && !bfd_link_executable (info))
2481 {
2482 relocation = (htab->elf.iplt->output_section->vma
2483 + htab->elf.iplt->output_offset
2484 + h->plt.offset
afca762f 2485 - s390_got_pointer (info));
d47b13e0
AK		 2486 goto do_relocation;
2487 }
2488
afca762f 2489 relocation -= s390_got_pointer (info);
947216bf 2490 break;
a85d7ed0 2491
947216bf 2492 case R_390_GOTPC:
a85d7ed0 2493 case R_390_GOTPCDBL:
947216bf 2494 /* Use global offset table as symbol value. */
afca762f 2495 relocation = s390_got_pointer (info);
b34976b6 2496 unresolved_reloc = FALSE;
947216bf 2497 break;
a85d7ed0 2498
fb798c50 2499 case R_390_PLT12DBL:
947216bf 2500 case R_390_PLT16DBL:
fb798c50 2501 case R_390_PLT24DBL:
947216bf
AM		 2502 case R_390_PLT32:
2503 case R_390_PLT32DBL:
2504 case R_390_PLT64:
2505 /* Relocation is to the entry for this symbol in the
2506 procedure linkage table. */
a85d7ed0 2507
947216bf
AM		 2508 /* Resolve a PLT32 reloc against a local symbol directly,
2509 without using the procedure linkage table. */
2510 if (h == NULL)
2511 break;
a85d7ed0 2512
947216bf 2513 if (h->plt.offset == (bfd_vma) -1
31db78f6 2514 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
947216bf
AM		 2515 {
2516 /* We didn't make a PLT entry for this symbol. This
2517 happens when statically linking PIC code, or when
2518 using -Bsymbolic. */
2519 break;
2520 }
470b557a
AK		 2521 if (s390_is_ifunc_symbol_p (h))
2522 relocation = (htab->elf.iplt->output_section->vma
2523 + htab->elf.iplt->output_offset
2524 + h->plt.offset);
2525 else
2526 relocation = (htab->elf.splt->output_section->vma
2527 + htab->elf.splt->output_offset
2528 + h->plt.offset);
b34976b6 2529 unresolved_reloc = FALSE;
26e41594 2530 break;
5236c819
MS		 2531
2532 case R_390_PLTOFF16:
2533 case R_390_PLTOFF32:
2534 case R_390_PLTOFF64:
26e41594
AM		 2535 /* Relocation is to the entry for this symbol in the
2536 procedure linkage table relative to the start of the GOT. */
5236c819
MS		 2537
2538 /* For local symbols or if we didn't make a PLT entry for
2539 this symbol resolve the symbol directly. */
31db78f6 2540 if (h == NULL
5236c819 2541 || h->plt.offset == (bfd_vma) -1
31db78f6 2542 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
5236c819 2543 {
afca762f 2544 relocation -= s390_got_pointer (info);
5236c819
MS		 2545 break;
2546 }
2547
470b557a
AK		 2548 if (s390_is_ifunc_symbol_p (h))
2549 relocation = (htab->elf.iplt->output_section->vma
2550 + htab->elf.iplt->output_offset
2551 + h->plt.offset
afca762f 2552 - s390_got_pointer (info));
470b557a
AK		 2553 else
2554 relocation = (htab->elf.splt->output_section->vma
2555 + htab->elf.splt->output_offset
2556 + h->plt.offset
afca762f 2557 - s390_got_pointer (info));
5236c819 2558 unresolved_reloc = FALSE;
947216bf
AM		 2559 break;
2560
947216bf 2561 case R_390_PC16:
fb798c50 2562 case R_390_PC12DBL:
947216bf 2563 case R_390_PC16DBL:
fb798c50 2564 case R_390_PC24DBL:
947216bf 2565 case R_390_PC32:
a85d7ed0 2566 case R_390_PC32DBL:
947216bf 2567 case R_390_PC64:
431e5de3
AK		 2568 if (h != NULL
2569 && bfd_link_pie (info)
2570 && !h->def_regular)
2571 {
871b3ab2 2572 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
431e5de3
AK		 2573 "in shared library and accessed "
2574 "from executable "
2575 "(rebuild file with -fPIC ?)"),
2576 input_bfd, h->root.root.string);
2577 bfd_set_error (bfd_error_bad_value);
2578 return FALSE;
2579 }
99ba5125
AK		 2580 /* The target of these relocs are instruction operands
2581 residing in read-only sections. We cannot emit a runtime
2582 reloc for it. */
2583 if (h != NULL
2584 && s390_is_ifunc_symbol_p (h)
2585 && h->def_regular
2586 && bfd_link_pic (info))
2587 {
2588 relocation = (htab->elf.iplt->output_section->vma
2589 + htab->elf.iplt->output_offset
2590 + h->plt.offset);
2591 goto do_relocation;
2592 }
1a0670f3 2593 /* Fall through. */
99ba5125
AK		 2594
2595 case R_390_8:
2596 case R_390_16:
2597 case R_390_32:
2598 case R_390_64:
470b557a 2599
f657f8c4
NC		 2600 if ((input_section->flags & SEC_ALLOC) == 0)
2601 break;
2602
470b557a
AK		 2603 if (h != NULL
2604 && s390_is_ifunc_symbol_p (h)
2605 && h->def_regular)
2606 {
d7ab4911 2607 if (!bfd_link_pic (info))
470b557a 2608 {
d7ab4911
AK		 2609 /* For a non-shared object the symbol will not
2610 change. Hence we can write the address of the
2611 target IPLT slot now. */
470b557a
AK		 2612 relocation = (htab->elf.iplt->output_section->vma
2613 + htab->elf.iplt->output_offset
2614 + h ->plt.offset);
2615 goto do_relocation;
2616 }
2617 else
2618 {
2619 /* For shared objects a runtime relocation is needed. */
2620
2621 Elf_Internal_Rela outrel;
2622 asection *sreloc;
2623
2624 /* Need a dynamic relocation to get the real function
2625 address. */
2626 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2627 info,
2628 input_section,
2629 rel->r_offset);
2630 if (outrel.r_offset == (bfd_vma) -1
2631 || outrel.r_offset == (bfd_vma) -2)
2632 abort ();
2633
2634 outrel.r_offset += (input_section->output_section->vma
2635 + input_section->output_offset);
2636
2637 if (h->dynindx == -1
2638 || h->forced_local
0e1862bb 2639 || bfd_link_executable (info))
470b557a
AK		 2640 {
2641 /* This symbol is resolved locally. */
2642 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2643 outrel.r_addend = (h->root.u.def.value
2644 + h->root.u.def.section->output_section->vma
2645 + h->root.u.def.section->output_offset);
2646 }
2647 else
2648 {
2649 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2650 outrel.r_addend = 0;
2651 }
2652
2653 sreloc = htab->elf.irelifunc;
2654 elf_append_rela (output_bfd, sreloc, &outrel);
2655
2656 /* If this reloc is against an external symbol, we
2657 do not want to fiddle with the addend. Otherwise,
2658 we need to include the symbol value so that it
2659 becomes an addend for the dynamic reloc. For an
2660 internal symbol, we have updated addend. */
2661 continue;
2662 }
2663 }
2664
0e1862bb 2665 if ((bfd_link_pic (info)
82058a73 2666 && (h == NULL
b27bb18f
L		 2667 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2668 && !resolved_to_zero)
82058a73 2669 || h->root.type != bfd_link_hash_undefweak)
0451c93c 2670 && ((r_type != R_390_PC16
fb798c50 2671 && r_type != R_390_PC12DBL
0451c93c 2672 && r_type != R_390_PC16DBL
fb798c50 2673 && r_type != R_390_PC24DBL
0451c93c
MS		 2674 && r_type != R_390_PC32
2675 && r_type != R_390_PC32DBL
2676 && r_type != R_390_PC64)
8c21ca21 2677 || !SYMBOL_CALLS_LOCAL (info, h)))
64285810 2678 || (ELIMINATE_COPY_RELOCS
0e1862bb 2679 && !bfd_link_pic (info)
0451c93c
MS		 2680 && h != NULL
2681 && h->dynindx != -1
f5385ebf
AM		 2682 && !h->non_got_ref
2683 && ((h->def_dynamic
2684 && !h->def_regular)
0451c93c
MS		 2685 || h->root.type == bfd_link_hash_undefweak
2686 || h->root.type == bfd_link_hash_undefined)))
947216bf
AM		 2687 {
2688 Elf_Internal_Rela outrel;
b34976b6 2689 bfd_boolean skip, relocate;
0451c93c 2690 asection *sreloc;
947216bf 2691 bfd_byte *loc;
a85d7ed0 2692
947216bf
AM		 2693 /* When generating a shared object, these relocations
2694 are copied into the output file to be resolved at run
2695 time. */
b34976b6
AM		 2696 skip = FALSE;
2697 relocate = FALSE;
a85d7ed0 2698
c629eae0
JJ		 2699 outrel.r_offset =
2700 _bfd_elf_section_offset (output_bfd, info, input_section,
2701 rel->r_offset);
2702 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2703 skip = TRUE;
0bb2d96a 2704 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2705 skip = TRUE, relocate = TRUE;
a85d7ed0 2706
947216bf
AM		 2707 outrel.r_offset += (input_section->output_section->vma
2708 + input_section->output_offset);
a85d7ed0 2709
947216bf 2710 if (skip)
0bb2d96a 2711 memset (&outrel, 0, sizeof outrel);
947216bf 2712 else if (h != NULL
0451c93c
MS		 2713 && h->dynindx != -1
2714 && (r_type == R_390_PC16
fb798c50 2715 || r_type == R_390_PC12DBL
0451c93c 2716 || r_type == R_390_PC16DBL
fb798c50 2717 || r_type == R_390_PC24DBL
0451c93c
MS		 2718 || r_type == R_390_PC32
2719 || r_type == R_390_PC32DBL
2720 || r_type == R_390_PC64
0e1862bb 2721 || !bfd_link_pic (info)
8c21ca21 2722 || !SYMBOLIC_BIND (info, h)
f5385ebf 2723 || !h->def_regular))
947216bf
AM		 2724 {
2725 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
27018c3f 2726 outrel.r_addend = rel->r_addend;
947216bf
AM		 2727 }
2728 else
2729 {
0451c93c 2730 /* This symbol is local, or marked to become local. */
90ced0dd 2731 outrel.r_addend = relocation + rel->r_addend;
b5727d75
MS		 2732 if (r_type == R_390_64)
2733 {
2734 relocate = TRUE;
2735 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
b5727d75
MS		 2736 }
2737 else
2738 {
2739 long sindx;
2740
90ced0dd 2741 if (bfd_is_abs_section (sec))
b5727d75
MS		 2742 sindx = 0;
2743 else if (sec == NULL || sec->owner == NULL)
2744 {
2745 bfd_set_error(bfd_error_bad_value);
2746 return FALSE;
2747 }
2748 else
2749 {
2750 asection *osec;
2751
2752 osec = sec->output_section;
2753 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 2754
2755 if (sindx == 0)
2756 {
2757 osec = htab->elf.text_index_section;
2758 sindx = elf_section_data (osec)->dynindx;
2759 }
2760 BFD_ASSERT (sindx != 0);
90ced0dd
MS		 2761
2762 /* We are turning this relocation into one
2763 against a section symbol, so subtract out
2764 the output section's address but not the
2765 offset of the input section in the output
2766 section. */
90ced0dd 2767 outrel.r_addend -= osec->vma;
b5727d75
MS		 2768 }
2769 outrel.r_info = ELF64_R_INFO (sindx, r_type);
b5727d75 2770 }
0451c93c 2771 }
a85d7ed0 2772
0451c93c
MS		 2773 sreloc = elf_section_data (input_section)->sreloc;
2774 if (sreloc == NULL)
2775 abort ();
2776
947216bf
AM		 2777 loc = sreloc->contents;
2778 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2779 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
a85d7ed0 2780
947216bf
AM		 2781 /* If this reloc is against an external symbol, we do
2782 not want to fiddle with the addend. Otherwise, we
2783 need to include the symbol value so that it becomes
2784 an addend for the dynamic reloc. */
2785 if (! relocate)
2786 continue;
2787 }
a85d7ed0 2788
947216bf 2789 break;
a85d7ed0 2790
69fc87f1
MS		 2791 /* Relocations for tls literal pool entries. */
2792 case R_390_TLS_IE64:
0e1862bb 2793 if (bfd_link_pic (info))
69fc87f1
MS		 2794 {
2795 Elf_Internal_Rela outrel;
2796 asection *sreloc;
2797 bfd_byte *loc;
2798
2799 outrel.r_offset = rel->r_offset
2800 + input_section->output_section->vma
2801 + input_section->output_offset;
2802 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2803 sreloc = elf_section_data (input_section)->sreloc;
2804 if (sreloc == NULL)
2805 abort ();
2806 loc = sreloc->contents;
2807 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2808 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2809 }
ae9a127f 2810 /* Fall through. */
69fc87f1
MS		 2811
2812 case R_390_TLS_GD64:
2813 case R_390_TLS_GOTIE64:
2814 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2815 tls_type = GOT_UNKNOWN;
2816 if (h == NULL && local_got_offsets)
2817 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2818 else if (h != NULL)
2819 {
2820 tls_type = elf_s390_hash_entry(h)->tls_type;
0e1862bb 2821 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
69fc87f1
MS		 2822 r_type = R_390_TLS_LE64;
2823 }
2824 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2825 r_type = R_390_TLS_IE64;
2826
2827 if (r_type == R_390_TLS_LE64)
2828 {
2829 /* This relocation gets optimized away by the local exec
2830 access optimization. */
2831 BFD_ASSERT (! unresolved_reloc);
2832 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2833 contents + rel->r_offset);
2834 continue;
2835 }
2836
f41345a7 2837 if (htab->elf.sgot == NULL)
69fc87f1
MS		 2838 abort ();
2839
2840 if (h != NULL)
2841 off = h->got.offset;
2842 else
2843 {
2844 if (local_got_offsets == NULL)
2845 abort ();
2846
2847 off = local_got_offsets[r_symndx];
2848 }
2849
2850 emit_tls_relocs:
2851
2852 if ((off & 1) != 0)
2853 off &= ~1;
26e41594 2854 else
69fc87f1
MS		 2855 {
2856 Elf_Internal_Rela outrel;
2857 bfd_byte *loc;
2858 int dr_type, indx;
2859
f41345a7 2860 if (htab->elf.srelgot == NULL)
69fc87f1
MS		 2861 abort ();
2862
f41345a7
AK		 2863 outrel.r_offset = (htab->elf.sgot->output_section->vma
2864 + htab->elf.sgot->output_offset + off);
69fc87f1
MS		 2865
2866 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2867 if (r_type == R_390_TLS_GD64)
2868 dr_type = R_390_TLS_DTPMOD;
2869 else
2870 dr_type = R_390_TLS_TPOFF;
2871 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2872 outrel.r_addend = relocation - dtpoff_base (info);
2873 else
2874 outrel.r_addend = 0;
2875 outrel.r_info = ELF64_R_INFO (indx, dr_type);
f41345a7
AK		 2876 loc = htab->elf.srelgot->contents;
2877 loc += htab->elf.srelgot->reloc_count++
69fc87f1
MS		 2878 * sizeof (Elf64_External_Rela);
2879 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2880
2881 if (r_type == R_390_TLS_GD64)
2882 {
2883 if (indx == 0)
2884 {
07d6d2b8 2885 BFD_ASSERT (! unresolved_reloc);
69fc87f1
MS		 2886 bfd_put_64 (output_bfd,
2887 relocation - dtpoff_base (info),
f41345a7 2888 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
69fc87f1
MS		 2889 }
2890 else
2891 {
2892 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2893 outrel.r_offset += GOT_ENTRY_SIZE;
2894 outrel.r_addend = 0;
f41345a7 2895 htab->elf.srelgot->reloc_count++;
69fc87f1
MS		 2896 loc += sizeof (Elf64_External_Rela);
2897 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2898 }
2899 }
2900
2901 if (h != NULL)
2902 h->got.offset |= 1;
2903 else
2904 local_got_offsets[r_symndx] |= 1;
2905 }
2906
2907 if (off >= (bfd_vma) -2)
2908 abort ();
2909 if (r_type == ELF64_R_TYPE (rel->r_info))
2910 {
f41345a7 2911 relocation = htab->elf.sgot->output_offset + off;
69fc87f1 2912 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
f41345a7 2913 relocation += htab->elf.sgot->output_section->vma;
69fc87f1
MS		 2914 unresolved_reloc = FALSE;
2915 }
2916 else
2917 {
f41345a7 2918 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
69fc87f1
MS		 2919 contents + rel->r_offset);
2920 continue;
2921 }
2922 break;
2923
2924 case R_390_TLS_GOTIE12:
bd1ea41b 2925 case R_390_TLS_GOTIE20:
69fc87f1
MS		 2926 case R_390_TLS_IEENT:
2927 if (h == NULL)
2928 {
2929 if (local_got_offsets == NULL)
2930 abort();
2931 off = local_got_offsets[r_symndx];
0e1862bb 2932 if (bfd_link_pic (info))
69fc87f1
MS		 2933 goto emit_tls_relocs;
2934 }
2935 else
2936 {
2937 off = h->got.offset;
2938 tls_type = elf_s390_hash_entry(h)->tls_type;
0e1862bb 2939 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
69fc87f1
MS		 2940 goto emit_tls_relocs;
2941 }
2942
f41345a7 2943 if (htab->elf.sgot == NULL)
69fc87f1
MS		 2944 abort ();
2945
2946 BFD_ASSERT (! unresolved_reloc);
2947 bfd_put_64 (output_bfd, -tpoff (info, relocation),
f41345a7
AK		 2948 htab->elf.sgot->contents + off);
2949 relocation = htab->elf.sgot->output_offset + off;
69fc87f1 2950 if (r_type == R_390_TLS_IEENT)
f41345a7 2951 relocation += htab->elf.sgot->output_section->vma;
69fc87f1
MS		 2952 unresolved_reloc = FALSE;
2953 break;
2954
2955 case R_390_TLS_LDM64:
0e1862bb 2956 if (! bfd_link_pic (info))
69fc87f1
MS		 2957 /* The literal pool entry this relocation refers to gets ignored
2958 by the optimized code of the local exec model. Do nothing
2959 and the value will turn out zero. */
2960 continue;
2961
f41345a7 2962 if (htab->elf.sgot == NULL)
69fc87f1
MS		 2963 abort ();
2964
2965 off = htab->tls_ldm_got.offset;
2966 if (off & 1)
2967 off &= ~1;
2968 else
2969 {
2970 Elf_Internal_Rela outrel;
2971 bfd_byte *loc;
2972
f41345a7 2973 if (htab->elf.srelgot == NULL)
69fc87f1
MS		 2974 abort ();
2975
f41345a7
AK		 2976 outrel.r_offset = (htab->elf.sgot->output_section->vma
2977 + htab->elf.sgot->output_offset + off);
69fc87f1
MS		 2978
2979 bfd_put_64 (output_bfd, 0,
f41345a7 2980 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
69fc87f1
MS		 2981 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2982 outrel.r_addend = 0;
f41345a7
AK		 2983 loc = htab->elf.srelgot->contents;
2984 loc += htab->elf.srelgot->reloc_count++
69fc87f1
MS		 2985 * sizeof (Elf64_External_Rela);
2986 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2987 htab->tls_ldm_got.offset |= 1;
2988 }
f41345a7 2989 relocation = htab->elf.sgot->output_offset + off;
26e41594 2990 unresolved_reloc = FALSE;
69fc87f1
MS		 2991 break;
2992
2993 case R_390_TLS_LE64:
3cbc1e5e 2994 if (bfd_link_dll (info))
69fc87f1
MS		 2995 {
2996 /* Linking a shared library with non-fpic code requires
2997 a R_390_TLS_TPOFF relocation. */
2998 Elf_Internal_Rela outrel;
2999 asection *sreloc;
3000 bfd_byte *loc;
3001 int indx;
3002
3003 outrel.r_offset = rel->r_offset
3004 + input_section->output_section->vma
3005 + input_section->output_offset;
3006 if (h != NULL && h->dynindx != -1)
3007 indx = h->dynindx;
3008 else
3009 indx = 0;
3010 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3011 if (indx == 0)
3012 outrel.r_addend = relocation - dtpoff_base (info);
3013 else
3014 outrel.r_addend = 0;
3015 sreloc = elf_section_data (input_section)->sreloc;
3016 if (sreloc == NULL)
3017 abort ();
3018 loc = sreloc->contents;
3019 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3020 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3021 }
3022 else
3023 {
3024 BFD_ASSERT (! unresolved_reloc);
3025 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3026 contents + rel->r_offset);
3027 }
3028 continue;
3029
3030 case R_390_TLS_LDO64:
0e1862bb 3031 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
69fc87f1
MS		 3032 relocation -= dtpoff_base (info);
3033 else
3034 /* When converting LDO to LE, we must negate. */
3035 relocation = -tpoff (info, relocation);
3036 break;
3037
3038 /* Relocations for tls instructions. */
3039 case R_390_TLS_LOAD:
3040 case R_390_TLS_GDCALL:
3041 case R_390_TLS_LDCALL:
3042 tls_type = GOT_UNKNOWN;
3043 if (h == NULL && local_got_offsets)
3044 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3045 else if (h != NULL)
3046 tls_type = elf_s390_hash_entry(h)->tls_type;
3047
3048 if (tls_type == GOT_TLS_GD)
3049 continue;
3050
3051 if (r_type == R_390_TLS_LOAD)
3052 {
0e1862bb 3053 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
69fc87f1
MS		 3054 {
3055 /* IE->LE transition. Four valid cases:
3056 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3057 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3058 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3059 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3060 unsigned int insn0, insn1, ry;
3061
3062 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3063 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3064 if (insn1 != 0x0004)
3704e358
AK		 3065 {
3066 invalid_tls_insn (input_bfd, input_section, rel);
3067 return FALSE;
3068 }
69fc87f1
MS		 3069 if ((insn0 & 0xff00f000) == 0xe3000000)
3070 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3071 ry = (insn0 & 0x000f0000);
3072 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3073 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3074 ry = (insn0 & 0x0000f000) << 4;
3075 else if ((insn0 & 0xff00f000) == 0xe300c000)
3076 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3077 ry = (insn0 & 0x000f0000);
3078 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3079 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3080 ry = (insn0 & 0x0000f000) << 4;
3081 else
3704e358
AK		 3082 {
3083 invalid_tls_insn (input_bfd, input_section, rel);
3084 return FALSE;
3085 }
69fc87f1
MS		 3086 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3087 insn1 = 0x000d;
3088 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3089 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3090 }
3091 }
3092 else if (r_type == R_390_TLS_GDCALL)
3093 {
3094 unsigned int insn0, insn1;
3095
3096 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3097 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3098 if ((insn0 & 0xffff0000) != 0xc0e50000)
3704e358
AK		 3099 {
3100 invalid_tls_insn (input_bfd, input_section, rel);
3101 return FALSE;
3102 }
0e1862bb 3103 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
69fc87f1
MS		 3104 {
3105 /* GD->LE transition.
3106 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3107 insn0 = 0xc0040000;
3108 insn1 = 0x0000;
3109 }
3110 else
3111 {
3112 /* GD->IE transition.
3113 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3114 insn0 = 0xe322c000;
3115 insn1 = 0x0004;
3116 }
3117 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3118 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3119 }
3120 else if (r_type == R_390_TLS_LDCALL)
3121 {
0e1862bb 3122 if (!bfd_link_pic (info))
69fc87f1
MS		 3123 {
3124 unsigned int insn0, insn1;
3125
3126 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3127 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3128 if ((insn0 & 0xffff0000) != 0xc0e50000)
3704e358
AK		 3129 {
3130 invalid_tls_insn (input_bfd, input_section, rel);
3131 return FALSE;
3132 }
69fc87f1
MS		 3133 /* LD->LE transition.
3134 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3135 insn0 = 0xc0040000;
3136 insn1 = 0x0000;
3137 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3138 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3139 }
3140 }
3141 continue;
3142
947216bf
AM		 3143 default:
3144 break;
3145 }
a85d7ed0 3146
239e1f3a
AM		 3147 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3148 because such sections are not SEC_ALLOC and thus ld.so will
3149 not process them. */
0451c93c 3150 if (unresolved_reloc
239e1f3a 3151 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 3152 && h->def_dynamic)
3153 && _bfd_elf_section_offset (output_bfd, info, input_section,
3154 rel->r_offset) != (bfd_vma) -1)
4eca0228 3155 _bfd_error_handler
695344c0 3156 /* xgettext:c-format */
2dcf00ce
AM		 3157 (_("%pB(%pA+%#" PRIx64 "): "
3158 "unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3159 input_bfd,
3160 input_section,
2dcf00ce 3161 (uint64_t) rel->r_offset,
843fe662 3162 howto->name,
0451c93c
MS		 3163 h->root.root.string);
3164
470b557a
AK		 3165 do_relocation:
3166
fb798c50
AK		 3167 /* When applying a 24 bit reloc we need to start one byte
3168 earlier. Otherwise the 32 bit get/put bfd operations might
3169 access a byte after the actual section. */
3170 if (r_type == R_390_PC24DBL
3171 || r_type == R_390_PLT24DBL)
3172 rel->r_offset--;
3173
bd1ea41b
MS		 3174 if (r_type == R_390_20
3175 || r_type == R_390_GOT20
3176 || r_type == R_390_GOTPLT20
3177 || r_type == R_390_TLS_GOTIE20)
3178 {
3179 relocation += rel->r_addend;
3180 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3181 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3182 contents, rel->r_offset,
3183 relocation, 0);
3184 }
3185 else
3186 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
a85d7ed0
NC		 3187 contents, rel->r_offset,
3188 relocation, rel->r_addend);
3189
3190 if (r != bfd_reloc_ok)
3191 {
0451c93c 3192 const char *name;
ec338859 3193
0451c93c
MS		 3194 if (h != NULL)
3195 name = h->root.root.string;
3196 else
a85d7ed0 3197 {
0451c93c
MS		 3198 name = bfd_elf_string_from_elf_section (input_bfd,
3199 symtab_hdr->sh_link,
3200 sym->st_name);
3201 if (name == NULL)
b34976b6 3202 return FALSE;
0451c93c
MS		 3203 if (*name == '\0')
3204 name = bfd_section_name (input_bfd, sec);
3205 }
ec338859 3206
0451c93c 3207 if (r == bfd_reloc_overflow)
1a72702b
AM		 3208 (*info->callbacks->reloc_overflow)
3209 (info, (h ? &h->root : NULL), name, howto->name,
3210 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
0451c93c
MS		 3211 else
3212 {
4eca0228 3213 _bfd_error_handler
695344c0 3214 /* xgettext:c-format */
2dcf00ce 3215 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
d003868e 3216 input_bfd, input_section,
2dcf00ce 3217 (uint64_t) rel->r_offset, name, (int) r);
b34976b6 3218 return FALSE;
a85d7ed0
NC		 3219 }
3220 }
3221 }
3222
b34976b6 3223 return TRUE;
a85d7ed0
NC		 3224}
3225
470b557a
AK		 3226/* Generate the PLT slots together with the dynamic relocations needed
3227 for IFUNC symbols. */
3228
3229static void
3230elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3231 struct bfd_link_info *info,
3232 struct elf_link_hash_entry *h,
3233 struct elf_s390_link_hash_table *htab,
3234 bfd_vma plt_offset,
3235 bfd_vma resolver_address)
3236{
3237 bfd_vma plt_index;
3238 bfd_vma got_offset;
3239 Elf_Internal_Rela rela;
3240 bfd_byte *loc;
3241 asection *plt, *gotplt, *relplt;
3242
3243 if (htab->elf.iplt == NULL
3244 || htab->elf.igotplt == NULL
3245 || htab->elf.irelplt == NULL)
3246 abort ();
3247
3248 /* Index of the PLT slot within iplt section. */
3249 plt_index = plt_offset / PLT_ENTRY_SIZE;
3250 plt = htab->elf.iplt;
3251 /* Offset into the igot.plt section. */
3252 got_offset = plt_index * GOT_ENTRY_SIZE;
3253 gotplt = htab->elf.igotplt;
3254 relplt = htab->elf.irelplt;
3255
3256 /* Fill in the blueprint of a PLT. */
3257 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3258 PLT_ENTRY_SIZE);
3259
3260 /* Fixup the relative address to the GOT entry */
3261 bfd_put_32 (output_bfd,
3262 (gotplt->output_section->vma +
3263 gotplt->output_offset + got_offset
3264 - (plt->output_section->vma +
3265 plt->output_offset +
3266 plt_offset))/2,
3267 plt->contents + plt_offset + 2);
3268 /* Fixup the relative branch to PLT 0 */
3269 bfd_put_32 (output_bfd, - (plt->output_offset +
3270 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3271 plt->contents + plt_offset + 24);
3272 /* Fixup offset into .rela.plt section. */
3273 bfd_put_32 (output_bfd, relplt->output_offset +
3274 plt_index * sizeof (Elf64_External_Rela),
3275 plt->contents + plt_offset + 28);
3276
3277 /* Fill in the entry in the global offset table.
3278 Points to instruction after GOT offset. */
3279 bfd_put_64 (output_bfd,
3280 (plt->output_section->vma
3281 + plt->output_offset
3282 + plt_offset
3283 + 14),
3284 gotplt->contents + got_offset);
3285
3286 /* Fill in the entry in the .rela.plt section. */
3287 rela.r_offset = (gotplt->output_section->vma
3288 + gotplt->output_offset
3289 + got_offset);
3290
3291 if (!h
3292 || h->dynindx == -1
0e1862bb 3293 || ((bfd_link_executable (info)
470b557a
AK		 3294 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3295 && h->def_regular))
3296 {
3297 /* The symbol can be locally resolved. */
3298 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3299 rela.r_addend = resolver_address;
3300 }
3301 else
3302 {
3303 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3304 rela.r_addend = 0;
3305 }
3306
3307 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3308 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3309}
3310
3311
a85d7ed0
NC		 3312/* Finish up dynamic symbol handling. We set the contents of various
3313 dynamic sections here. */
3314
b34976b6 3315static bfd_boolean
4dfe6ac6
NC		 3316elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3317 struct bfd_link_info *info,
3318 struct elf_link_hash_entry *h,
3319 Elf_Internal_Sym *sym)
a85d7ed0 3320{
0451c93c 3321 struct elf_s390_link_hash_table *htab;
470b557a 3322 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
a85d7ed0 3323
0451c93c 3324 htab = elf_s390_hash_table (info);
4dfe6ac6
NC		 3325 if (htab == NULL)
3326 return FALSE;
a85d7ed0
NC		 3327
3328 if (h->plt.offset != (bfd_vma) -1)
3329 {
a85d7ed0 3330 bfd_vma plt_index;
afca762f 3331 bfd_vma gotplt_offset;
0451c93c 3332 Elf_Internal_Rela rela;
947216bf 3333 bfd_byte *loc;
a85d7ed0
NC		 3334
3335 /* This symbol has an entry in the procedure linkage table. Set
947216bf 3336 it up. */
0a511368 3337 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
470b557a 3338 {
0a511368
AK		 3339 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3340 htab, h->plt.offset,
3341 eh->ifunc_resolver_address +
3342 eh->ifunc_resolver_section->output_offset +
3343 eh->ifunc_resolver_section->output_section->vma);
3344
3345 /* Do not return yet. Handling of explicit GOT slots of
3346 IFUNC symbols is below. */
470b557a
AK		 3347 }
3348 else
3349 {
3350 if (h->dynindx == -1
3351 || htab->elf.splt == NULL
3352 || htab->elf.sgotplt == NULL
3353 || htab->elf.srelplt == NULL)
3354 abort ();
a85d7ed0 3355
470b557a
AK		 3356 /* Calc. index no.
3357 Current offset - size first entry / entry size. */
3358 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
a85d7ed0 3359
afca762f
AK		 3360 /* The slots in the .got.plt correspond to the PLT slots in
3361 the same order. */
3362 gotplt_offset = plt_index * GOT_ENTRY_SIZE;
3363
3364 /* If .got.plt comes first it needs to contain the 3 header
3365 entries. */
3366 if (!s390_gotplt_after_got_p (info))
3367 gotplt_offset += 3 * GOT_ENTRY_SIZE;
a85d7ed0 3368
470b557a
AK		 3369 /* Fill in the blueprint of a PLT. */
3370 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3371 PLT_ENTRY_SIZE);
3372
afca762f
AK		 3373 /* The first instruction in the PLT entry is a LARL loading
3374 the address of the GOT slot. We write the 4 byte
3375 immediate operand of the LARL instruction here. */
470b557a
AK		 3376 bfd_put_32 (output_bfd,
3377 (htab->elf.sgotplt->output_section->vma +
afca762f 3378 htab->elf.sgotplt->output_offset + gotplt_offset
470b557a
AK		 3379 - (htab->elf.splt->output_section->vma +
3380 htab->elf.splt->output_offset +
3381 h->plt.offset))/2,
3382 htab->elf.splt->contents + h->plt.offset + 2);
3383 /* Fixup the relative branch to PLT 0 */
3384 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3385 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3386 htab->elf.splt->contents + h->plt.offset + 24);
3387 /* Fixup offset into .rela.plt section. */
3388 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3389 htab->elf.splt->contents + h->plt.offset + 28);
3390
3391 /* Fill in the entry in the global offset table.
3392 Points to instruction after GOT offset. */
3393 bfd_put_64 (output_bfd,
3394 (htab->elf.splt->output_section->vma
3395 + htab->elf.splt->output_offset
3396 + h->plt.offset
3397 + 14),
afca762f 3398 htab->elf.sgotplt->contents + gotplt_offset);
470b557a
AK		 3399
3400 /* Fill in the entry in the .rela.plt section. */
3401 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3402 + htab->elf.sgotplt->output_offset
afca762f 3403 + gotplt_offset);
470b557a
AK		 3404 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3405 rela.r_addend = 0;
3406 loc = htab->elf.srelplt->contents + plt_index *
3407 sizeof (Elf64_External_Rela);
3408 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3409
3410 if (!h->def_regular)
3411 {
3412 /* Mark the symbol as undefined, rather than as defined in
3413 the .plt section. Leave the value alone. This is a clue
3414 for the dynamic linker, to make function pointer
3415 comparisons work between an application and shared
3416 library. */
3417 sym->st_shndx = SHN_UNDEF;
3418 }
a85d7ed0
NC		 3419 }
3420 }
3421
69fc87f1
MS		 3422 if (h->got.offset != (bfd_vma) -1
3423 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3424 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3425 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
a85d7ed0 3426 {
a85d7ed0 3427 Elf_Internal_Rela rela;
947216bf 3428 bfd_byte *loc;
a85d7ed0
NC		 3429
3430 /* This symbol has an entry in the global offset table. Set it
947216bf 3431 up. */
f41345a7 3432 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
0451c93c 3433 abort ();
a85d7ed0 3434
f41345a7
AK		 3435 rela.r_offset = (htab->elf.sgot->output_section->vma
3436 + htab->elf.sgot->output_offset
dc810e39 3437 + (h->got.offset &~ (bfd_vma) 1));
a85d7ed0 3438
470b557a
AK		 3439 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3440 {
0e1862bb 3441 if (bfd_link_pic (info))
470b557a
AK		 3442 {
3443 /* An explicit GOT slot usage needs GLOB_DAT. If the
3444 symbol references local the implicit got.iplt slot
3445 will be used and the IRELATIVE reloc has been created
3446 above. */
3447 goto do_glob_dat;
3448 }
3449 else
3450 {
3451 /* For non-shared objects explicit GOT slots must be
3452 filled with the PLT slot address for pointer
3453 equality reasons. */
3454 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3455 + htab->elf.iplt->output_offset
3456 + h->plt.offset),
3457 htab->elf.sgot->contents + h->got.offset);
3458 return TRUE;
3459 }
3460 }
0e1862bb 3461 else if (bfd_link_pic (info)
ceada896 3462 && SYMBOL_REFERENCES_LOCAL (info, h))
947216bf 3463 {
10e7c045
AK		 3464 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3465 return TRUE;
3466
470b557a
AK		 3467 /* If this is a static link, or it is a -Bsymbolic link and
3468 the symbol is defined locally or was forced to be local
3469 because of a version file, we just want to emit a
3470 RELATIVE reloc. The entry in the global offset table
3471 will already have been initialized in the
3472 relocate_section function. */
8170f769 3473 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
8c21ca21 3474 return FALSE;
0451c93c 3475 BFD_ASSERT((h->got.offset & 1) != 0);
947216bf
AM		 3476 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3477 rela.r_addend = (h->root.u.def.value
3478 + h->root.u.def.section->output_section->vma
3479 + h->root.u.def.section->output_offset);
3480 }
a85d7ed0
NC		 3481 else
3482 {
3483 BFD_ASSERT((h->got.offset & 1) == 0);
ceada896 3484 do_glob_dat:
f41345a7 3485 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
a85d7ed0 3486 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
947216bf
AM		 3487 rela.r_addend = 0;
3488 }
a85d7ed0 3489
f41345a7
AK		 3490 loc = htab->elf.srelgot->contents;
3491 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3492 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3493 }
3494
f5385ebf 3495 if (h->needs_copy)
a85d7ed0 3496 {
a85d7ed0 3497 Elf_Internal_Rela rela;
5474d94f 3498 asection *s;
947216bf 3499 bfd_byte *loc;
a85d7ed0
NC		 3500
3501 /* This symbols needs a copy reloc. Set it up. */
3502
0451c93c
MS		 3503 if (h->dynindx == -1
3504 || (h->root.type != bfd_link_hash_defined
3505 && h->root.type != bfd_link_hash_defweak)
9d19e4fd 3506 || htab->elf.srelbss == NULL)
0451c93c 3507 abort ();
a85d7ed0
NC		 3508
3509 rela.r_offset = (h->root.u.def.value
3510 + h->root.u.def.section->output_section->vma
3511 + h->root.u.def.section->output_offset);
3512 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3513 rela.r_addend = 0;
afbf7e8e 3514 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 3515 s = htab->elf.sreldynrelro;
3516 else
3517 s = htab->elf.srelbss;
3518 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3519 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3520 }
3521
3522 /* Mark some specially defined symbols as absolute. */
9637f6ef 3523 if (h == htab->elf.hdynamic
22edb2f1
RS		 3524 || h == htab->elf.hgot
3525 || h == htab->elf.hplt)
a85d7ed0
NC		 3526 sym->st_shndx = SHN_ABS;
3527
b34976b6 3528 return TRUE;
a85d7ed0
NC		 3529}
3530
0451c93c
MS		 3531/* Used to decide how to sort relocs in an optimal manner for the
3532 dynamic linker, before writing them out. */
3533
3534static enum elf_reloc_type_class
7e612e98
AM		 3535elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3536 const asection *rel_sec ATTRIBUTE_UNUSED,
3537 const Elf_Internal_Rela *rela)
0451c93c 3538{
0f042c67
AK		 3539 bfd *abfd = info->output_bfd;
3540 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3541 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3542 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3543 Elf_Internal_Sym sym;
3544
3545 if (htab->elf.dynsym == NULL
3546 || !bed->s->swap_symbol_in (abfd,
3547 (htab->elf.dynsym->contents
3548 + r_symndx * bed->s->sizeof_sym),
3549 0, &sym))
3550 abort ();
3551
3552 /* Check relocation against STT_GNU_IFUNC symbol. */
3553 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3554 return reloc_class_ifunc;
3555
0451c93c
MS		 3556 switch ((int) ELF64_R_TYPE (rela->r_info))
3557 {
3558 case R_390_RELATIVE:
3559 return reloc_class_relative;
3560 case R_390_JMP_SLOT:
3561 return reloc_class_plt;
3562 case R_390_COPY:
3563 return reloc_class_copy;
3564 default:
3565 return reloc_class_normal;
3566 }
3567}
3568
a85d7ed0
NC		 3569/* Finish up the dynamic sections. */
3570
b34976b6 3571static bfd_boolean
4dfe6ac6
NC		 3572elf_s390_finish_dynamic_sections (bfd *output_bfd,
3573 struct bfd_link_info *info)
a85d7ed0 3574{
0451c93c 3575 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 3576 bfd *dynobj;
3577 asection *sdyn;
470b557a
AK		 3578 bfd *ibfd;
3579 unsigned int i;
a85d7ed0 3580
0451c93c 3581 htab = elf_s390_hash_table (info);
4dfe6ac6
NC		 3582 if (htab == NULL)
3583 return FALSE;
3584
0451c93c 3585 dynobj = htab->elf.dynobj;
3d4d4302 3586 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
a85d7ed0 3587
0451c93c 3588 if (htab->elf.dynamic_sections_created)
a85d7ed0 3589 {
a85d7ed0
NC		 3590 Elf64_External_Dyn *dyncon, *dynconend;
3591
f41345a7 3592 if (sdyn == NULL || htab->elf.sgot == NULL)
0451c93c 3593 abort ();
a85d7ed0
NC		 3594
3595 dyncon = (Elf64_External_Dyn *) sdyn->contents;
eea6121a 3596 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
a85d7ed0
NC		 3597 for (; dyncon < dynconend; dyncon++)
3598 {
3599 Elf_Internal_Dyn dyn;
a85d7ed0 3600 asection *s;
ec338859 3601
a85d7ed0 3602 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
ec338859 3603
a85d7ed0
NC		 3604 switch (dyn.d_tag)
3605 {
3606 default:
0451c93c 3607 continue;
ec338859 3608
a85d7ed0 3609 case DT_PLTGOT:
afca762f
AK		 3610 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3611 dyn.d_un.d_ptr = s390_got_pointer (info);
0451c93c 3612 break;
ec338859 3613
a85d7ed0 3614 case DT_JMPREL:
4ade44b7
AM		 3615 s = htab->elf.srelplt;
3616 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
a85d7ed0 3617 break;
ec338859 3618
a85d7ed0 3619 case DT_PLTRELSZ:
79c12fae
AK		 3620 dyn.d_un.d_val = htab->elf.srelplt->size;
3621 if (htab->elf.irelplt)
3622 dyn.d_un.d_val += htab->elf.irelplt->size;
a85d7ed0 3623 break;
ec338859 3624
a85d7ed0
NC		 3625 case DT_RELASZ:
3626 /* The procedure linkage table relocs (DT_JMPREL) should
3627 not be included in the overall relocs (DT_RELA).
3628 Therefore, we override the DT_RELASZ entry here to
3629 make it not include the JMPREL relocs. Since the
3630 linker script arranges for .rela.plt to follow all
3631 other relocation sections, we don't have to worry
3632 about changing the DT_RELA entry. */
79c12fae
AK		 3633 dyn.d_un.d_val -= htab->elf.srelplt->size;
3634 if (htab->elf.irelplt)
3635 dyn.d_un.d_val -= htab->elf.irelplt->size;
a85d7ed0
NC		 3636 break;
3637 }
0451c93c
MS		 3638
3639 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
a85d7ed0
NC		 3640 }
3641
3642 /* Fill in the special first entry in the procedure linkage table. */
f41345a7 3643 if (htab->elf.splt && htab->elf.splt->size > 0)
a85d7ed0
NC		 3644 {
3645 /* fill in blueprint for plt 0 entry */
f41345a7 3646 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
9aa17453 3647 PLT_FIRST_ENTRY_SIZE);
afca762f
AK		 3648 /* The second instruction in the first PLT entry is a LARL
3649 loading the GOT pointer. Fill in the LARL immediate
3650 address. */
a85d7ed0 3651 bfd_put_32 (output_bfd,
afca762f 3652 (s390_got_pointer (info)
161db279
AK		 3653 - htab->elf.splt->output_section->vma
3654 - htab->elf.splt->output_offset - 6)/2,
f41345a7 3655 htab->elf.splt->contents + 8);
a85d7ed0 3656 }
387f8054
MR		 3657 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3658 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3659 = PLT_ENTRY_SIZE;
a85d7ed0
NC		 3660 }
3661
afca762f 3662 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
a85d7ed0 3663 {
0451c93c 3664 /* Fill in the first three entries in the global offset table. */
afca762f 3665 if (htab->elf.hgot->root.u.def.section->size > 0)
0451c93c
MS		 3666 {
3667 bfd_put_64 (output_bfd,
3668 (sdyn == NULL ? (bfd_vma) 0
3669 : sdyn->output_section->vma + sdyn->output_offset),
afca762f 3670 htab->elf.hgot->root.u.def.section->contents);
0451c93c 3671 /* One entry for shared object struct ptr. */
afca762f
AK		 3672 bfd_put_64 (output_bfd, (bfd_vma) 0,
3673 htab->elf.hgot->root.u.def.section->contents + 8);
0451c93c 3674 /* One entry for _dl_runtime_resolve. */
afca762f
AK		 3675 bfd_put_64 (output_bfd, (bfd_vma) 0,
3676 htab->elf.hgot->root.u.def.section->contents + 16);
0451c93c 3677 }
f41345a7 3678 elf_section_data (htab->elf.sgot->output_section)
0451c93c
MS		 3679 ->this_hdr.sh_entsize = 8;
3680 }
470b557a
AK		 3681
3682 /* Finish dynamic symbol for local IFUNC symbols. */
c72f2fb2 3683 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
470b557a
AK		 3684 {
3685 struct plt_entry *local_plt;
3686 Elf_Internal_Sym *isym;
3687 Elf_Internal_Shdr *symtab_hdr;
3688
3689 symtab_hdr = &elf_symtab_hdr (ibfd);
3690
1ef692ea
AK		 3691 if (!is_s390_elf (ibfd))
3692 continue;
3693
470b557a
AK		 3694 local_plt = elf_s390_local_plt (ibfd);
3695 if (local_plt != NULL)
3696 for (i = 0; i < symtab_hdr->sh_info; i++)
3697 {
3698 if (local_plt[i].plt.offset != (bfd_vma) -1)
3699 {
3700 asection *sec = local_plt[i].sec;
3701 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3702 if (isym == NULL)
3703 return FALSE;
3704
3705 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3706 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3707 local_plt[i].plt.offset,
3708 isym->st_value
3709 + sec->output_section->vma
3710 + sec->output_offset);
3711
3712 }
3713 }
3714 }
3715
b34976b6 3716 return TRUE;
a85d7ed0 3717}
e3e9290d
AA		 3718\f
3719/* Support for core dump NOTE sections. */
a85d7ed0 3720
e3e9290d
AA		 3721static bfd_boolean
3722elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3723{
3724 int offset;
3725 size_t size;
3726
3727 switch (note->descsz)
3728 {
3729 default:
3730 return FALSE;
3731
3732 case 336: /* sizeof(struct elf_prstatus) on s390x */
3733 /* pr_cursig */
3734 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3735
3736 /* pr_pid */
3737 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3738
3739 /* pr_reg */
3740 offset = 112;
3741 size = 216;
3742 break;
3743 }
3744
3745 /* Make a ".reg/999" section. */
3746 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3747 size, note->descpos + offset);
3748}
3749
3750static bfd_boolean
3751elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3752{
3753 switch (note->descsz)
3754 {
3755 default:
3756 return FALSE;
3757
3758 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3759 elf_tdata (abfd)->core->pid
3760 = bfd_get_32 (abfd, note->descdata + 24);
3761 elf_tdata (abfd)->core->program
3762 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3763 elf_tdata (abfd)->core->command
3764 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3765 }
3766
3767 /* Note that for some reason, a spurious space is tacked
3768 onto the end of the args in some (at least one anyway)
3769 implementations, so strip it off if it exists. */
3770
3771 {
3772 char *command = elf_tdata (abfd)->core->command;
3773 int n = strlen (command);
3774
3775 if (0 < n && command[n - 1] == ' ')
3776 command[n - 1] = '\0';
3777 }
3778
3779 return TRUE;
3780}
3781
3782static char *
3783elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3784 int note_type, ...)
3785{
3786 va_list ap;
3787
3788 switch (note_type)
3789 {
3790 default:
3791 return NULL;
3792
3793 case NT_PRPSINFO:
3794 {
602f1657 3795 char data[136] ATTRIBUTE_NONSTRING = { 0 };
e3e9290d
AA		 3796 const char *fname, *psargs;
3797
3798 va_start (ap, note_type);
3799 fname = va_arg (ap, const char *);
3800 psargs = va_arg (ap, const char *);
3801 va_end (ap);
3802
3803 strncpy (data + 40, fname, 16);
898ade12 3804#if GCC_VERSION == 8000 || GCC_VERSION == 8001
95da9854 3805 DIAGNOSTIC_PUSH;
be3e27bb 3806 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
95da9854
L		 3807 -Wstringop-truncation:
3808 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3809 */
95da9854
L		 3810 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3811#endif
e3e9290d 3812 strncpy (data + 56, psargs, 80);
898ade12 3813#if GCC_VERSION == 8000 || GCC_VERSION == 8001
95da9854 3814 DIAGNOSTIC_POP;
fe75810f 3815#endif
e3e9290d
AA		 3816 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3817 &data, sizeof (data));
3818 }
3819
3820 case NT_PRSTATUS:
3821 {
3822 char data[336] = { 0 };
3823 long pid;
3824 int cursig;
3825 const void *gregs;
3826
3827 va_start (ap, note_type);
3828 pid = va_arg (ap, long);
3829 cursig = va_arg (ap, int);
3830 gregs = va_arg (ap, const void *);
3831 va_end (ap);
3832
3833 bfd_put_16 (abfd, cursig, data + 12);
3834 bfd_put_32 (abfd, pid, data + 32);
3835 memcpy (data + 112, gregs, 216);
3836 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3837 &data, sizeof (data));
3838 }
3839 }
3840 /* NOTREACHED */
3841}
3842\f
4c45e5c9
JJ		 3843/* Return address for Ith PLT stub in section PLT, for relocation REL
3844 or (bfd_vma) -1 if it should not be included. */
3845
3846static bfd_vma
3847elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3848 const arelent *rel ATTRIBUTE_UNUSED)
3849{
3850 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3851}
3852
643f7afb
AK		 3853/* Merge backend specific data from an object file to the output
3854 object file when linking. */
3855
3856static bfd_boolean
50e03d47 3857elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
643f7afb 3858{
50e03d47 3859 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
643f7afb
AK		 3860 return TRUE;
3861
50e03d47 3862 return elf_s390_merge_obj_attributes (ibfd, info);
643f7afb
AK		 3863}
3864
b4cbbe8f
AK		 3865/* We may add a PT_S390_PGSTE program header. */
3866
3867static int
3868elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3869 struct bfd_link_info *info)
3870{
3871 struct elf_s390_link_hash_table *htab;
3872
93ec5e23
AK		 3873 if (info)
3874 {
3875 htab = elf_s390_hash_table (info);
3876 if (htab)
3877 return htab->params->pgste;
3878 }
3879 return 0;
b4cbbe8f
AK		 3880}
3881
3882
3883/* Add the PT_S390_PGSTE program header. */
3884
3885static bfd_boolean
93ec5e23 3886elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
b4cbbe8f
AK		 3887{
3888 struct elf_s390_link_hash_table *htab;
3889 struct elf_segment_map *m, *pm = NULL;
3890
93ec5e23
AK		 3891 if (!abfd || !info)
3892 return TRUE;
3893
b4cbbe8f 3894 htab = elf_s390_hash_table (info);
93ec5e23 3895 if (!htab || !htab->params->pgste)
b4cbbe8f
AK		 3896 return TRUE;
3897
3898 /* If there is already a PT_S390_PGSTE header, avoid adding
3899 another. */
3900 m = elf_seg_map (abfd);
3901 while (m && m->p_type != PT_S390_PGSTE)
3902 {
3903 pm = m;
3904 m = m->next;
3905 }
3906
3907 if (m)
3908 return TRUE;
3909
3910 m = (struct elf_segment_map *)
3911 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3912 if (m == NULL)
3913 return FALSE;
3914 m->p_type = PT_S390_PGSTE;
3915 m->count = 0;
3916 m->next = NULL;
3917 if (pm)
3918 pm->next = m;
3919
3920 return TRUE;
3921}
3922
3923bfd_boolean
3924bfd_elf_s390_set_options (struct bfd_link_info *info,
3925 struct s390_elf_params *params)
3926{
3927 struct elf_s390_link_hash_table *htab;
3928
93ec5e23
AK		 3929 if (info)
3930 {
3931 htab = elf_s390_hash_table (info);
3932 if (htab)
3933 htab->params = params;
3934 }
b4cbbe8f
AK		 3935
3936 return TRUE;
3937}
3938
3939
ae9a127f
NC		 3940/* Why was the hash table entry size definition changed from
3941 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3942 this is the only reason for the s390_elf64_size_info structure. */
a85d7ed0
NC		 3943
3944const struct elf_size_info s390_elf64_size_info =
3945{
3946 sizeof (Elf64_External_Ehdr),
3947 sizeof (Elf64_External_Phdr),
3948 sizeof (Elf64_External_Shdr),
3949 sizeof (Elf64_External_Rel),
3950 sizeof (Elf64_External_Rela),
3951 sizeof (Elf64_External_Sym),
3952 sizeof (Elf64_External_Dyn),
3953 sizeof (Elf_External_Note),
ae9a127f
NC		 3954 8, /* hash-table entry size. */
3955 1, /* internal relocations per external relocations. */
3956 64, /* arch_size. */
45d6a902 3957 3, /* log_file_align. */
a85d7ed0
NC		 3958 ELFCLASS64, EV_CURRENT,
3959 bfd_elf64_write_out_phdrs,
3960 bfd_elf64_write_shdrs_and_ehdr,
1489a3a0 3961 bfd_elf64_checksum_contents,
a85d7ed0 3962 bfd_elf64_write_relocs,
73ff0d56 3963 bfd_elf64_swap_symbol_in,
a85d7ed0
NC		 3964 bfd_elf64_swap_symbol_out,
3965 bfd_elf64_slurp_reloc_table,
3966 bfd_elf64_slurp_symbol_table,
3967 bfd_elf64_swap_dyn_in,
3968 bfd_elf64_swap_dyn_out,
947216bf
AM		 3969 bfd_elf64_swap_reloc_in,
3970 bfd_elf64_swap_reloc_out,
3971 bfd_elf64_swap_reloca_in,
3972 bfd_elf64_swap_reloca_out
a85d7ed0
NC		 3973};
3974
6d00b590 3975#define TARGET_BIG_SYM s390_elf64_vec
a85d7ed0
NC		 3976#define TARGET_BIG_NAME "elf64-s390"
3977#define ELF_ARCH bfd_arch_s390
ae95ffa6 3978#define ELF_TARGET_ID S390_ELF_DATA
a85d7ed0
NC		 3979#define ELF_MACHINE_CODE EM_S390
3980#define ELF_MACHINE_ALT1 EM_S390_OLD
3981#define ELF_MAXPAGESIZE 0x1000
3982
3983#define elf_backend_size_info s390_elf64_size_info
3984
3985#define elf_backend_can_gc_sections 1
51b64d56 3986#define elf_backend_can_refcount 1
a85d7ed0
NC		 3987#define elf_backend_want_got_plt 1
3988#define elf_backend_plt_readonly 1
3989#define elf_backend_want_plt_sym 0
3990#define elf_backend_got_header_size 24
5474d94f 3991#define elf_backend_want_dynrelro 1
b491616a 3992#define elf_backend_rela_normal 1
a85d7ed0
NC		 3993
3994#define elf_info_to_howto elf_s390_info_to_howto
3995
a85d7ed0
NC		 3996#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3997#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3998#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
07d6d2b8 3999#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
643f7afb 4000#define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
a85d7ed0
NC		 4001
4002#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4003#define elf_backend_check_relocs elf_s390_check_relocs
0451c93c 4004#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
9d19e4fd 4005#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
a85d7ed0
NC		 4006#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4007#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4008#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
0451c93c 4009#define elf_backend_reloc_type_class elf_s390_reloc_type_class
a85d7ed0
NC		 4010#define elf_backend_relocate_section elf_s390_relocate_section
4011#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
74541ad4 4012#define elf_backend_init_index_section _bfd_elf_init_1_index_section
e3e9290d
AA		 4013#define elf_backend_grok_prstatus elf_s390_grok_prstatus
4014#define elf_backend_grok_psinfo elf_s390_grok_psinfo
4015#define elf_backend_write_core_note elf_s390_write_core_note
4c45e5c9 4016#define elf_backend_plt_sym_val elf_s390_plt_sym_val
07d6d2b8 4017#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
b4cbbe8f
AK		 4018#define elf_backend_additional_program_headers elf_s390_additional_program_headers
4019#define elf_backend_modify_segment_map elf_s390_modify_segment_map
a85d7ed0 4020
69fc87f1
MS		 4021#define bfd_elf64_mkobject elf_s390_mkobject
4022#define elf_backend_object_p elf_s390_object_p
a85d7ed0
NC		 4023
4024#include "elf64-target.h"
GDB Binutils - Deliverables
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