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Add documentation of M32R .high, .shigh and .low directives.
[thirdparty/binutils-gdb.git] / bfd / elf64-s390.c
CommitLineData
a85d7ed0 1/* IBM S/390-specific support for 64-bit ELF
ae9a127f 2 Copyright 2000, 2001, 2002, 2003 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
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22#include "bfd.h"
23#include "sysdep.h"
24#include "bfdlink.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
27
28static reloc_howto_type *elf_s390_reloc_type_lookup
29 PARAMS ((bfd *, bfd_reloc_code_real_type));
30static void elf_s390_info_to_howto
31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
b34976b6 32static bfd_boolean elf_s390_is_local_label_name
0451c93c
MS		 33 PARAMS ((bfd *, const char *));
34static struct bfd_hash_entry *link_hash_newfunc
a85d7ed0
NC		 35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36static struct bfd_link_hash_table *elf_s390_link_hash_table_create
37 PARAMS ((bfd *));
b34976b6 38static bfd_boolean create_got_section
0451c93c 39 PARAMS((bfd *, struct bfd_link_info *));
b34976b6 40static bfd_boolean elf_s390_create_dynamic_sections
0451c93c
MS		 41 PARAMS((bfd *, struct bfd_link_info *));
42static void elf_s390_copy_indirect_symbol
b48fa14c
AM		 43 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
44 struct elf_link_hash_entry *));
b34976b6 45static bfd_boolean elf_s390_check_relocs
a85d7ed0
NC		 46 PARAMS ((bfd *, struct bfd_link_info *, asection *,
47 const Elf_Internal_Rela *));
99c79b2e 48static asection *elf_s390_gc_mark_hook
1e2f5b6e 49 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
99c79b2e 50 struct elf_link_hash_entry *, Elf_Internal_Sym *));
b34976b6 51static bfd_boolean elf_s390_gc_sweep_hook
99c79b2e
AJ		 52 PARAMS ((bfd *, struct bfd_link_info *, asection *,
53 const Elf_Internal_Rela *));
5236c819
MS		 54struct elf_s390_link_hash_entry;
55static void elf_s390_adjust_gotplt
56 PARAMS ((struct elf_s390_link_hash_entry *));
b34976b6 57static bfd_boolean elf_s390_adjust_dynamic_symbol
a85d7ed0 58 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
b34976b6 59static bfd_boolean allocate_dynrelocs
0451c93c 60 PARAMS ((struct elf_link_hash_entry *, PTR));
b34976b6 61static bfd_boolean readonly_dynrelocs
0451c93c 62 PARAMS ((struct elf_link_hash_entry *, PTR));
b34976b6 63static bfd_boolean elf_s390_size_dynamic_sections
a85d7ed0 64 PARAMS ((bfd *, struct bfd_link_info *));
b34976b6 65static bfd_boolean elf_s390_relocate_section
a85d7ed0
NC		 66 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
67 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
b34976b6 68static bfd_boolean elf_s390_finish_dynamic_symbol
a85d7ed0
NC		 69 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
70 Elf_Internal_Sym *));
0451c93c
MS		 71static enum elf_reloc_type_class elf_s390_reloc_type_class
72 PARAMS ((const Elf_Internal_Rela *));
b34976b6 73static bfd_boolean elf_s390_finish_dynamic_sections
a85d7ed0 74 PARAMS ((bfd *, struct bfd_link_info *));
69fc87f1
MS		 75static bfd_boolean elf_s390_mkobject
76 PARAMS ((bfd *));
5236c819
MS		 77static bfd_boolean elf_s390_object_p
78 PARAMS ((bfd *));
69fc87f1
MS		 79static int elf_s390_tls_transition
80 PARAMS ((struct bfd_link_info *, int, int));
81static bfd_reloc_status_type s390_tls_reloc
82 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
83static bfd_vma dtpoff_base
84 PARAMS ((struct bfd_link_info *));
85static bfd_vma tpoff
86 PARAMS ((struct bfd_link_info *, bfd_vma));
87static void invalid_tls_insn
88 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
bd1ea41b
MS		 89static bfd_reloc_status_type s390_elf_ldisp_reloc
90 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
a85d7ed0 91
a85d7ed0
NC		 92#include "elf/s390.h"
93
94/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
95 from smaller values. Start with zero, widen, *then* decrement. */
96#define MINUS_ONE (((bfd_vma)0) - 1)
97
98/* The relocation "howto" table. */
99static reloc_howto_type elf_howto_table[] =
100{
101 HOWTO (R_390_NONE, /* type */
102 0, /* rightshift */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
104 0, /* bitsize */
b34976b6 105 FALSE, /* pc_relative */
a85d7ed0
NC		 106 0, /* bitpos */
107 complain_overflow_dont, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_390_NONE", /* name */
b34976b6 110 FALSE, /* partial_inplace */
a85d7ed0
NC		 111 0, /* src_mask */
112 0, /* dst_mask */
b34976b6
AM		 113 FALSE), /* pcrel_offset */
114
5236c819
MS		 115 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
117 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
118 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
119 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
121 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
123 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
125 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
126 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
127 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
131 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
133 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
135 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
137 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
139 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
141 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
143 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
145 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
147 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
149 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
151 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
153 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
155 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
157 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
159 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
161 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
163 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
165 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
167 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
169 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
171 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
172 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
173 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
175 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
177 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
179 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
181 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
183 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
184 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
185 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
186 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
69fc87f1
MS		 187 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
188 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
189 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
190 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
191 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
192 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
193 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
194 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
196 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
197 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
198 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
199 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
200 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
201 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
202 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
203 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
204 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
205 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
206 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
207 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
208 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
209 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
210 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
212 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
213 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
214 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
215 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
216 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
217 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
218 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
219 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
220 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
bd1ea41b
MS		 221 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
222 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
223 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
224 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
225 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
226 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
227 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
228 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
a85d7ed0
NC		 229};
230
231/* GNU extension to record C++ vtable hierarchy. */
232static reloc_howto_type elf64_s390_vtinherit_howto =
b34976b6 233 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
a85d7ed0 234static reloc_howto_type elf64_s390_vtentry_howto =
b34976b6 235 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		 236
237static reloc_howto_type *
238elf_s390_reloc_type_lookup (abfd, code)
239 bfd *abfd ATTRIBUTE_UNUSED;
240 bfd_reloc_code_real_type code;
241{
0451c93c
MS		 242 switch (code)
243 {
244 case BFD_RELOC_NONE:
245 return &elf_howto_table[(int) R_390_NONE];
246 case BFD_RELOC_8:
247 return &elf_howto_table[(int) R_390_8];
248 case BFD_RELOC_390_12:
249 return &elf_howto_table[(int) R_390_12];
250 case BFD_RELOC_16:
251 return &elf_howto_table[(int) R_390_16];
252 case BFD_RELOC_32:
253 return &elf_howto_table[(int) R_390_32];
254 case BFD_RELOC_CTOR:
255 return &elf_howto_table[(int) R_390_32];
256 case BFD_RELOC_32_PCREL:
257 return &elf_howto_table[(int) R_390_PC32];
258 case BFD_RELOC_390_GOT12:
259 return &elf_howto_table[(int) R_390_GOT12];
260 case BFD_RELOC_32_GOT_PCREL:
261 return &elf_howto_table[(int) R_390_GOT32];
262 case BFD_RELOC_390_PLT32:
263 return &elf_howto_table[(int) R_390_PLT32];
264 case BFD_RELOC_390_COPY:
265 return &elf_howto_table[(int) R_390_COPY];
266 case BFD_RELOC_390_GLOB_DAT:
267 return &elf_howto_table[(int) R_390_GLOB_DAT];
268 case BFD_RELOC_390_JMP_SLOT:
269 return &elf_howto_table[(int) R_390_JMP_SLOT];
270 case BFD_RELOC_390_RELATIVE:
271 return &elf_howto_table[(int) R_390_RELATIVE];
272 case BFD_RELOC_32_GOTOFF:
5236c819 273 return &elf_howto_table[(int) R_390_GOTOFF32];
0451c93c
MS		 274 case BFD_RELOC_390_GOTPC:
275 return &elf_howto_table[(int) R_390_GOTPC];
276 case BFD_RELOC_390_GOT16:
277 return &elf_howto_table[(int) R_390_GOT16];
278 case BFD_RELOC_16_PCREL:
279 return &elf_howto_table[(int) R_390_PC16];
280 case BFD_RELOC_390_PC16DBL:
281 return &elf_howto_table[(int) R_390_PC16DBL];
282 case BFD_RELOC_390_PLT16DBL:
283 return &elf_howto_table[(int) R_390_PLT16DBL];
0451c93c
MS		 284 case BFD_RELOC_390_PC32DBL:
285 return &elf_howto_table[(int) R_390_PC32DBL];
286 case BFD_RELOC_390_PLT32DBL:
287 return &elf_howto_table[(int) R_390_PLT32DBL];
288 case BFD_RELOC_390_GOTPCDBL:
289 return &elf_howto_table[(int) R_390_GOTPCDBL];
290 case BFD_RELOC_64:
291 return &elf_howto_table[(int) R_390_64];
292 case BFD_RELOC_64_PCREL:
293 return &elf_howto_table[(int) R_390_PC64];
294 case BFD_RELOC_390_GOT64:
295 return &elf_howto_table[(int) R_390_GOT64];
296 case BFD_RELOC_390_PLT64:
297 return &elf_howto_table[(int) R_390_PLT64];
298 case BFD_RELOC_390_GOTENT:
299 return &elf_howto_table[(int) R_390_GOTENT];
5236c819
MS		 300 case BFD_RELOC_16_GOTOFF:
301 return &elf_howto_table[(int) R_390_GOTOFF16];
302 case BFD_RELOC_390_GOTOFF64:
303 return &elf_howto_table[(int) R_390_GOTOFF64];
304 case BFD_RELOC_390_GOTPLT12:
305 return &elf_howto_table[(int) R_390_GOTPLT12];
306 case BFD_RELOC_390_GOTPLT16:
307 return &elf_howto_table[(int) R_390_GOTPLT16];
308 case BFD_RELOC_390_GOTPLT32:
309 return &elf_howto_table[(int) R_390_GOTPLT32];
310 case BFD_RELOC_390_GOTPLT64:
311 return &elf_howto_table[(int) R_390_GOTPLT64];
312 case BFD_RELOC_390_GOTPLTENT:
313 return &elf_howto_table[(int) R_390_GOTPLTENT];
314 case BFD_RELOC_390_PLTOFF16:
315 return &elf_howto_table[(int) R_390_PLTOFF16];
316 case BFD_RELOC_390_PLTOFF32:
317 return &elf_howto_table[(int) R_390_PLTOFF32];
318 case BFD_RELOC_390_PLTOFF64:
319 return &elf_howto_table[(int) R_390_PLTOFF64];
69fc87f1
MS		 320 case BFD_RELOC_390_TLS_LOAD:
321 return &elf_howto_table[(int) R_390_TLS_LOAD];
322 case BFD_RELOC_390_TLS_GDCALL:
323 return &elf_howto_table[(int) R_390_TLS_GDCALL];
324 case BFD_RELOC_390_TLS_LDCALL:
325 return &elf_howto_table[(int) R_390_TLS_LDCALL];
326 case BFD_RELOC_390_TLS_GD64:
327 return &elf_howto_table[(int) R_390_TLS_GD64];
328 case BFD_RELOC_390_TLS_GOTIE12:
329 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
330 case BFD_RELOC_390_TLS_GOTIE64:
331 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
332 case BFD_RELOC_390_TLS_LDM64:
333 return &elf_howto_table[(int) R_390_TLS_LDM64];
334 case BFD_RELOC_390_TLS_IE64:
335 return &elf_howto_table[(int) R_390_TLS_IE64];
336 case BFD_RELOC_390_TLS_IEENT:
337 return &elf_howto_table[(int) R_390_TLS_IEENT];
338 case BFD_RELOC_390_TLS_LE64:
339 return &elf_howto_table[(int) R_390_TLS_LE64];
340 case BFD_RELOC_390_TLS_LDO64:
341 return &elf_howto_table[(int) R_390_TLS_LDO64];
342 case BFD_RELOC_390_TLS_DTPMOD:
343 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
344 case BFD_RELOC_390_TLS_DTPOFF:
345 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
346 case BFD_RELOC_390_TLS_TPOFF:
347 return &elf_howto_table[(int) R_390_TLS_TPOFF];
bd1ea41b
MS		 348 case BFD_RELOC_390_20:
349 return &elf_howto_table[(int) R_390_20];
350 case BFD_RELOC_390_GOT20:
351 return &elf_howto_table[(int) R_390_GOT20];
352 case BFD_RELOC_390_GOTPLT20:
353 return &elf_howto_table[(int) R_390_GOTPLT20];
354 case BFD_RELOC_390_TLS_GOTIE20:
355 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
5236c819
MS		 356 case BFD_RELOC_VTABLE_INHERIT:
357 return &elf64_s390_vtinherit_howto;
358 case BFD_RELOC_VTABLE_ENTRY:
359 return &elf64_s390_vtentry_howto;
0451c93c
MS		 360 default:
361 break;
362 }
a85d7ed0
NC		 363 return 0;
364}
365
366/* We need to use ELF64_R_TYPE so we have our own copy of this function,
367 and elf64-s390.c has its own copy. */
368
369static void
370elf_s390_info_to_howto (abfd, cache_ptr, dst)
371 bfd *abfd ATTRIBUTE_UNUSED;
372 arelent *cache_ptr;
373 Elf_Internal_Rela *dst;
374{
375 switch (ELF64_R_TYPE(dst->r_info))
376 {
377 case R_390_GNU_VTINHERIT:
378 cache_ptr->howto = &elf64_s390_vtinherit_howto;
379 break;
380
381 case R_390_GNU_VTENTRY:
382 cache_ptr->howto = &elf64_s390_vtentry_howto;
383 break;
384
385 default:
386 BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
387 cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)];
99c79b2e 388 }
a85d7ed0
NC		 389}
390
69fc87f1
MS		 391/* A relocation function which doesn't do anything. */
392static bfd_reloc_status_type
393s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
26e41594 394 output_bfd, error_message)
69fc87f1
MS		 395 bfd *abfd ATTRIBUTE_UNUSED;
396 arelent *reloc_entry;
397 asymbol *symbol ATTRIBUTE_UNUSED;
398 PTR data ATTRIBUTE_UNUSED;
399 asection *input_section;
400 bfd *output_bfd;
401 char **error_message ATTRIBUTE_UNUSED;
402{
403 if (output_bfd)
404 reloc_entry->address += input_section->output_offset;
405 return bfd_reloc_ok;
406}
407
bd1ea41b
MS		 408/* Handle the large displacement relocs. */
409static bfd_reloc_status_type
410s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
411 output_bfd, error_message)
412 bfd *abfd;
413 arelent *reloc_entry;
414 asymbol *symbol;
415 PTR data;
416 asection *input_section;
417 bfd *output_bfd;
418 char **error_message ATTRIBUTE_UNUSED;
419{
420 reloc_howto_type *howto = reloc_entry->howto;
421 bfd_vma relocation;
422 bfd_vma insn;
423
424 if (output_bfd != (bfd *) NULL
425 && (symbol->flags & BSF_SECTION_SYM) == 0
426 && (! howto->partial_inplace
427 || reloc_entry->addend == 0))
428 {
429 reloc_entry->address += input_section->output_offset;
430 return bfd_reloc_ok;
431 }
432 if (output_bfd != NULL)
433 return bfd_reloc_continue;
434
435 if (reloc_entry->address > input_section->_cooked_size)
436 return bfd_reloc_outofrange;
437
438 relocation = (symbol->value
439 + symbol->section->output_section->vma
440 + symbol->section->output_offset);
441 relocation += reloc_entry->addend;
442 if (howto->pc_relative)
443 {
444 relocation -= (input_section->output_section->vma
445 + input_section->output_offset);
446 relocation -= reloc_entry->address;
447 }
448
449 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
450 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
451 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
452
453 if ((bfd_signed_vma) relocation < - 0x80000
454 || (bfd_signed_vma) relocation > 0x7ffff)
455 return bfd_reloc_overflow;
456 else
457 return bfd_reloc_ok;
458}
459
b34976b6 460static bfd_boolean
a85d7ed0
NC		 461elf_s390_is_local_label_name (abfd, name)
462 bfd *abfd;
463 const char *name;
464{
465 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
b34976b6 466 return TRUE;
a85d7ed0
NC		 467
468 return _bfd_elf_is_local_label_name (abfd, name);
469}
470
471/* Functions for the 390 ELF linker. */
472
473/* The name of the dynamic interpreter. This is put in the .interp
474 section. */
475
476#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
477
64285810
MS		 478/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
479 copying dynamic variables from a shared lib into an app's dynbss
480 section, and instead use a dynamic relocation to point into the
481 shared lib. */
482#define ELIMINATE_COPY_RELOCS 1
483
a85d7ed0
NC		 484/* The size in bytes of the first entry in the procedure linkage table. */
485#define PLT_FIRST_ENTRY_SIZE 32
486/* The size in bytes of an entry in the procedure linkage table. */
99c79b2e 487#define PLT_ENTRY_SIZE 32
a85d7ed0
NC		 488
489#define GOT_ENTRY_SIZE 8
490
491/* The first three entries in a procedure linkage table are reserved,
492 and the initial contents are unimportant (we zero them out).
493 Subsequent entries look like this. See the SVR4 ABI 386
494 supplement to see how this works. */
495
496/* For the s390, simple addr offset can only be 0 - 4096.
497 To use the full 16777216 TB address space, several instructions
498 are needed to load an address in a register and execute
499 a branch( or just saving the address)
500
99c79b2e 501 Furthermore, only r 0 and 1 are free to use!!! */
a85d7ed0
NC		 502
503/* The first 3 words in the GOT are then reserved.
504 Word 0 is the address of the dynamic table.
505 Word 1 is a pointer to a structure describing the object
506 Word 2 is used to point to the loader entry address.
507
508 The code for PLT entries looks like this:
509
510 The GOT holds the address in the PLT to be executed.
511 The loader then gets:
512 24(15) = Pointer to the structure describing the object.
99c79b2e 513 28(15) = Offset in symbol table
a85d7ed0
NC		 514 The loader must then find the module where the function is
515 and insert the address in the GOT.
516
517 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
518 LG 1,0(1) # 6 bytes Load address from GOT in r1
519 BCR 15,1 # 2 bytes Jump to address
520 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
521 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
522 BRCL 15,-x # 6 bytes Jump to start of PLT
523 .long ? # 4 bytes offset into symbol table
524
525 Total = 32 bytes per PLT entry
526 Fixup at offset 2: relative address to GOT entry
527 Fixup at offset 22: relative branch to PLT0
528 Fixup at offset 28: 32 bit offset into symbol table
529
530 A 32 bit offset into the symbol table is enough. It allows for symbol
531 tables up to a size of 2 gigabyte. A single dynamic object (the main
532 program, any shared library) is limited to 4GB in size and I want to see
533 the program that manages to have a symbol table of more than 2 GB with a
534 total size of at max 4 GB. */
535
dc810e39
AM		 536#define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
537#define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
538#define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
539#define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
540#define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
541#define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
542#define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
543#define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
a85d7ed0
NC		 544
545/* The first PLT entry pushes the offset into the symbol table
546 from R1 onto the stack at 8(15) and the loader object info
547 at 12(15), loads the loader address in R1 and jumps to it. */
548
549/* The first entry in the PLT:
550
551 PLT0:
552 STG 1,56(15) # r1 contains the offset into the symbol table
553 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
554 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
555 LG 1,16(1) # get entry address of loader
556 BCR 15,1 # jump to loader
557
558 Fixup at offset 8: relative address to start of GOT. */
559
dc810e39
AM		 560#define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
561#define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
562#define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
563#define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
564#define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
565#define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
566#define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
567#define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
a85d7ed0
NC		 568
569/* The s390 linker needs to keep track of the number of relocs that it
0451c93c
MS		 570 decides to copy as dynamic relocs in check_relocs for each symbol.
571 This is so that it can later discard them if they are found to be
572 unnecessary. We store the information in a field extending the
573 regular ELF linker hash table. */
a85d7ed0 574
0451c93c 575struct elf_s390_dyn_relocs
a85d7ed0 576{
0451c93c
MS		 577 struct elf_s390_dyn_relocs *next;
578
579 /* The input section of the reloc. */
580 asection *sec;
581
582 /* Total number of relocs copied for the input section. */
a85d7ed0 583 bfd_size_type count;
0451c93c
MS		 584
585 /* Number of pc-relative relocs copied for the input section. */
586 bfd_size_type pc_count;
a85d7ed0
NC		 587};
588
589/* s390 ELF linker hash entry. */
590
591struct elf_s390_link_hash_entry
592{
0451c93c 593 struct elf_link_hash_entry elf;
a85d7ed0 594
0451c93c
MS		 595 /* Track dynamic relocs copied for this symbol. */
596 struct elf_s390_dyn_relocs *dyn_relocs;
5236c819
MS		 597
598 /* Number of GOTPLT references for a function. */
599 bfd_signed_vma gotplt_refcount;
69fc87f1
MS		 600
601#define GOT_UNKNOWN 0
602#define GOT_NORMAL 1
603#define GOT_TLS_GD 2
604#define GOT_TLS_IE 3
605#define GOT_TLS_IE_NLT 3
606 unsigned char tls_type;
a85d7ed0
NC		 607};
608
69fc87f1
MS		 609#define elf_s390_hash_entry(ent) \
610 ((struct elf_s390_link_hash_entry *)(ent))
611
612struct elf_s390_obj_tdata
613{
614 struct elf_obj_tdata root;
615
616 /* tls_type for each local got entry. */
617 char *local_got_tls_type;
618};
619
620#define elf_s390_tdata(abfd) \
621 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
622
623#define elf_s390_local_got_tls_type(abfd) \
624 (elf_s390_tdata (abfd)->local_got_tls_type)
625
626static bfd_boolean
627elf_s390_mkobject (abfd)
628 bfd *abfd;
629{
630 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
631 abfd->tdata.any = bfd_zalloc (abfd, amt);
632 if (abfd->tdata.any == NULL)
633 return FALSE;
634 return TRUE;
635}
636
637static bfd_boolean
638elf_s390_object_p (abfd)
639 bfd *abfd;
640{
641 /* Allocate our special target data. */
642 struct elf_s390_obj_tdata *new_tdata;
643 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
644 new_tdata = bfd_zalloc (abfd, amt);
645 if (new_tdata == NULL)
646 return FALSE;
647 new_tdata->root = *abfd->tdata.elf_obj_data;
648 abfd->tdata.any = new_tdata;
649 /* Set the right machine number for an s390 elf32 file. */
650 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
651}
652
a85d7ed0
NC		 653/* s390 ELF linker hash table. */
654
655struct elf_s390_link_hash_table
656{
0451c93c 657 struct elf_link_hash_table elf;
a85d7ed0 658
0451c93c
MS		 659 /* Short-cuts to get to dynamic linker sections. */
660 asection *sgot;
661 asection *sgotplt;
662 asection *srelgot;
663 asection *splt;
664 asection *srelplt;
665 asection *sdynbss;
666 asection *srelbss;
ec338859 667
69fc87f1
MS		 668 union {
669 bfd_signed_vma refcount;
670 bfd_vma offset;
671 } tls_ldm_got;
672
ec338859
AM		 673 /* Small local sym to section mapping cache. */
674 struct sym_sec_cache sym_sec;
0451c93c 675};
a85d7ed0
NC		 676
677/* Get the s390 ELF linker hash table from a link_info structure. */
678
679#define elf_s390_hash_table(p) \
680 ((struct elf_s390_link_hash_table *) ((p)->hash))
681
682/* Create an entry in an s390 ELF linker hash table. */
683
684static struct bfd_hash_entry *
0451c93c 685link_hash_newfunc (entry, table, string)
a85d7ed0
NC		 686 struct bfd_hash_entry *entry;
687 struct bfd_hash_table *table;
688 const char *string;
689{
a85d7ed0
NC		 690 /* Allocate the structure if it has not already been allocated by a
691 subclass. */
0451c93c
MS		 692 if (entry == NULL)
693 {
694 entry = bfd_hash_allocate (table,
695 sizeof (struct elf_s390_link_hash_entry));
696 if (entry == NULL)
697 return entry;
698 }
a85d7ed0
NC		 699
700 /* Call the allocation method of the superclass. */
0451c93c
MS		 701 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
702 if (entry != NULL)
a85d7ed0 703 {
0451c93c
MS		 704 struct elf_s390_link_hash_entry *eh;
705
706 eh = (struct elf_s390_link_hash_entry *) entry;
707 eh->dyn_relocs = NULL;
5236c819 708 eh->gotplt_refcount = 0;
69fc87f1 709 eh->tls_type = GOT_UNKNOWN;
a85d7ed0
NC		 710 }
711
0451c93c 712 return entry;
a85d7ed0
NC		 713}
714
715/* Create an s390 ELF linker hash table. */
716
717static struct bfd_link_hash_table *
718elf_s390_link_hash_table_create (abfd)
719 bfd *abfd;
720{
721 struct elf_s390_link_hash_table *ret;
dc810e39 722 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
a85d7ed0 723
e2d34d7d 724 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
0451c93c 725 if (ret == NULL)
a85d7ed0
NC		 726 return NULL;
727
0451c93c 728 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
a85d7ed0 729 {
e2d34d7d 730 free (ret);
a85d7ed0
NC		 731 return NULL;
732 }
733
0451c93c
MS		 734 ret->sgot = NULL;
735 ret->sgotplt = NULL;
736 ret->srelgot = NULL;
737 ret->splt = NULL;
738 ret->srelplt = NULL;
739 ret->sdynbss = NULL;
740 ret->srelbss = NULL;
69fc87f1 741 ret->tls_ldm_got.refcount = 0;
ec338859 742 ret->sym_sec.abfd = NULL;
0451c93c
MS		 743
744 return &ret->elf.root;
745}
746
747/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
748 shortcuts to them in our hash table. */
749
b34976b6 750static bfd_boolean
0451c93c
MS		 751create_got_section (dynobj, info)
752 bfd *dynobj;
753 struct bfd_link_info *info;
754{
755 struct elf_s390_link_hash_table *htab;
756
757 if (! _bfd_elf_create_got_section (dynobj, info))
b34976b6 758 return FALSE;
0451c93c
MS		 759
760 htab = elf_s390_hash_table (info);
761 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
762 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
763 if (!htab->sgot || !htab->sgotplt)
764 abort ();
765
766 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
767 if (htab->srelgot == NULL
768 || ! bfd_set_section_flags (dynobj, htab->srelgot,
769 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
770 | SEC_IN_MEMORY | SEC_LINKER_CREATED
771 | SEC_READONLY))
99881371 772 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
b34976b6
AM		 773 return FALSE;
774 return TRUE;
0451c93c
MS		 775}
776
777/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
778 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
779 hash table. */
780
b34976b6 781static bfd_boolean
0451c93c
MS		 782elf_s390_create_dynamic_sections (dynobj, info)
783 bfd *dynobj;
784 struct bfd_link_info *info;
785{
786 struct elf_s390_link_hash_table *htab;
787
788 htab = elf_s390_hash_table (info);
789 if (!htab->sgot && !create_got_section (dynobj, info))
b34976b6 790 return FALSE;
0451c93c
MS		 791
792 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 793 return FALSE;
0451c93c
MS		 794
795 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
796 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
797 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
798 if (!info->shared)
799 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
800
801 if (!htab->splt || !htab->srelplt || !htab->sdynbss
802 || (!info->shared && !htab->srelbss))
803 abort ();
804
b34976b6 805 return TRUE;
a85d7ed0
NC		 806}
807
0451c93c
MS		 808/* Copy the extra info we tack onto an elf_link_hash_entry. */
809
810static void
b48fa14c
AM		 811elf_s390_copy_indirect_symbol (bed, dir, ind)
812 struct elf_backend_data *bed;
0451c93c
MS		 813 struct elf_link_hash_entry *dir, *ind;
814{
815 struct elf_s390_link_hash_entry *edir, *eind;
816
817 edir = (struct elf_s390_link_hash_entry *) dir;
818 eind = (struct elf_s390_link_hash_entry *) ind;
819
820 if (eind->dyn_relocs != NULL)
821 {
822 if (edir->dyn_relocs != NULL)
823 {
824 struct elf_s390_dyn_relocs **pp;
825 struct elf_s390_dyn_relocs *p;
826
827 if (ind->root.type == bfd_link_hash_indirect)
828 abort ();
829
830 /* Add reloc counts against the weak sym to the strong sym
831 list. Merge any entries against the same section. */
832 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
833 {
834 struct elf_s390_dyn_relocs *q;
835
836 for (q = edir->dyn_relocs; q != NULL; q = q->next)
837 if (q->sec == p->sec)
838 {
839 q->pc_count += p->pc_count;
840 q->count += p->count;
841 *pp = p->next;
842 break;
843 }
844 if (q == NULL)
845 pp = &p->next;
846 }
847 *pp = edir->dyn_relocs;
848 }
849
850 edir->dyn_relocs = eind->dyn_relocs;
851 eind->dyn_relocs = NULL;
852 }
853
69fc87f1
MS		 854 if (ind->root.type == bfd_link_hash_indirect
855 && dir->got.refcount <= 0)
856 {
857 edir->tls_type = eind->tls_type;
858 eind->tls_type = GOT_UNKNOWN;
859 }
860
64285810
MS		 861 if (ELIMINATE_COPY_RELOCS
862 && ind->root.type != bfd_link_hash_indirect
863 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
864 /* If called to transfer flags for a weakdef during processing
865 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
866 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
867 dir->elf_link_hash_flags |=
868 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
869 | ELF_LINK_HASH_REF_REGULAR
870 | ELF_LINK_HASH_REF_REGULAR_NONWEAK));
871 else
872 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
0451c93c 873}
a85d7ed0 874
69fc87f1
MS		 875static int
876elf_s390_tls_transition (info, r_type, is_local)
877 struct bfd_link_info *info;
878 int r_type;
879 int is_local;
880{
881 if (info->shared)
882 return r_type;
883
884 switch (r_type)
885 {
886 case R_390_TLS_GD64:
887 case R_390_TLS_IE64:
888 if (is_local)
889 return R_390_TLS_LE64;
890 return R_390_TLS_IE64;
891 case R_390_TLS_GOTIE64:
892 if (is_local)
893 return R_390_TLS_LE64;
894 return R_390_TLS_GOTIE64;
895 case R_390_TLS_LDM64:
896 return R_390_TLS_LE64;
897 }
898
899 return r_type;
900}
901
a85d7ed0
NC		 902/* Look through the relocs for a section during the first phase, and
903 allocate space in the global offset table or procedure linkage
904 table. */
905
b34976b6 906static bfd_boolean
a85d7ed0
NC		 907elf_s390_check_relocs (abfd, info, sec, relocs)
908 bfd *abfd;
909 struct bfd_link_info *info;
910 asection *sec;
911 const Elf_Internal_Rela *relocs;
912{
0451c93c 913 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 914 Elf_Internal_Shdr *symtab_hdr;
915 struct elf_link_hash_entry **sym_hashes;
a85d7ed0
NC		 916 const Elf_Internal_Rela *rel;
917 const Elf_Internal_Rela *rel_end;
a85d7ed0 918 asection *sreloc;
5236c819 919 bfd_signed_vma *local_got_refcounts;
69fc87f1 920 int tls_type, old_tls_type;
a85d7ed0 921
1049f94e 922 if (info->relocatable)
b34976b6 923 return TRUE;
a85d7ed0 924
0451c93c 925 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 926 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
927 sym_hashes = elf_sym_hashes (abfd);
5236c819 928 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0 929
a85d7ed0
NC		 930 sreloc = NULL;
931
932 rel_end = relocs + sec->reloc_count;
933 for (rel = relocs; rel < rel_end; rel++)
934 {
69fc87f1 935 unsigned int r_type;
a85d7ed0
NC		 936 unsigned long r_symndx;
937 struct elf_link_hash_entry *h;
938
939 r_symndx = ELF64_R_SYM (rel->r_info);
940
0451c93c
MS		 941 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
942 {
943 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
944 bfd_archive_filename (abfd),
945 r_symndx);
b34976b6 946 return FALSE;
0451c93c
MS		 947 }
948
a85d7ed0
NC		 949 if (r_symndx < symtab_hdr->sh_info)
950 h = NULL;
951 else
99c79b2e 952 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
a85d7ed0 953
5236c819
MS		 954 /* Create got section and local_got_refcounts array if they
955 are needed. */
69fc87f1
MS		 956 r_type = elf_s390_tls_transition (info,
957 ELF64_R_TYPE (rel->r_info),
958 h == NULL);
959 switch (r_type)
a85d7ed0
NC		 960 {
961 case R_390_GOT12:
947216bf 962 case R_390_GOT16:
bd1ea41b 963 case R_390_GOT20:
a85d7ed0
NC		 964 case R_390_GOT32:
965 case R_390_GOT64:
966 case R_390_GOTENT:
5236c819
MS		 967 case R_390_GOTPLT12:
968 case R_390_GOTPLT16:
bd1ea41b 969 case R_390_GOTPLT20:
5236c819
MS		 970 case R_390_GOTPLT32:
971 case R_390_GOTPLT64:
972 case R_390_GOTPLTENT:
69fc87f1
MS		 973 case R_390_TLS_GD64:
974 case R_390_TLS_GOTIE12:
bd1ea41b 975 case R_390_TLS_GOTIE20:
69fc87f1
MS		 976 case R_390_TLS_GOTIE64:
977 case R_390_TLS_IEENT:
978 case R_390_TLS_IE64:
979 case R_390_TLS_LDM64:
5236c819
MS		 980 if (h == NULL
981 && local_got_refcounts == NULL)
a85d7ed0 982 {
5236c819 983 bfd_size_type size;
0451c93c 984
5236c819 985 size = symtab_hdr->sh_info;
69fc87f1 986 size *= (sizeof (bfd_signed_vma) + sizeof(char));
5236c819
MS		 987 local_got_refcounts = ((bfd_signed_vma *)
988 bfd_zalloc (abfd, size));
a85d7ed0 989 if (local_got_refcounts == NULL)
5236c819
MS		 990 return FALSE;
991 elf_local_got_refcounts (abfd) = local_got_refcounts;
69fc87f1
MS		 992 elf_s390_local_got_tls_type (abfd)
993 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
a85d7ed0 994 }
5236c819
MS		 995 /* Fall through. */
996 case R_390_GOTOFF16:
997 case R_390_GOTOFF32:
998 case R_390_GOTOFF64:
0451c93c
MS		 999 case R_390_GOTPC:
1000 case R_390_GOTPCDBL:
1001 if (htab->sgot == NULL)
1002 {
1003 if (htab->elf.dynobj == NULL)
1004 htab->elf.dynobj = abfd;
1005 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 1006 return FALSE;
0451c93c 1007 }
5236c819
MS		 1008 }
1009
69fc87f1 1010 switch (r_type)
5236c819 1011 {
5236c819
MS		 1012 case R_390_GOTOFF16:
1013 case R_390_GOTOFF32:
1014 case R_390_GOTOFF64:
1015 case R_390_GOTPC:
1016 case R_390_GOTPCDBL:
1017 /* Got is created, nothing to be done. */
0451c93c 1018 break;
ec338859 1019
947216bf 1020 case R_390_PLT16DBL:
a85d7ed0
NC		 1021 case R_390_PLT32:
1022 case R_390_PLT32DBL:
1023 case R_390_PLT64:
5236c819
MS		 1024 case R_390_PLTOFF16:
1025 case R_390_PLTOFF32:
1026 case R_390_PLTOFF64:
a85d7ed0 1027 /* This symbol requires a procedure linkage table entry. We
947216bf
AM		 1028 actually build the entry in adjust_dynamic_symbol,
1029 because this might be a case of linking PIC code which is
1030 never referenced by a dynamic object, in which case we
1031 don't need to generate a procedure linkage table entry
1032 after all. */
ec338859 1033
a85d7ed0 1034 /* If this is a local symbol, we resolve it directly without
947216bf 1035 creating a procedure linkage table entry. */
5236c819
MS		 1036 if (h != NULL)
1037 {
1038 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1039 h->plt.refcount += 1;
1040 }
1041 break;
ec338859 1042
5236c819
MS		 1043 case R_390_GOTPLT12:
1044 case R_390_GOTPLT16:
bd1ea41b 1045 case R_390_GOTPLT20:
5236c819
MS		 1046 case R_390_GOTPLT32:
1047 case R_390_GOTPLT64:
1048 case R_390_GOTPLTENT:
1049 /* This symbol requires either a procedure linkage table entry
1050 or an entry in the local got. We actually build the entry
1051 in adjust_dynamic_symbol because whether this is really a
1052 global reference can change and with it the fact if we have
1053 to create a plt entry or a local got entry. To be able to
1054 make a once global symbol a local one we have to keep track
1055 of the number of gotplt references that exist for this
1056 symbol. */
1057 if (h != NULL)
1058 {
1059 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1060 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1061 h->plt.refcount += 1;
1062 }
69fc87f1
MS		 1063 else
1064 local_got_refcounts[r_symndx] += 1;
1065 break;
1066
1067 case R_390_TLS_LDM64:
1068 htab->tls_ldm_got.refcount += 1;
1069 break;
1070
1071 case R_390_TLS_IE64:
1072 case R_390_TLS_GOTIE12:
bd1ea41b 1073 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1074 case R_390_TLS_GOTIE64:
1075 case R_390_TLS_IEENT:
1076 if (info->shared)
1077 info->flags |= DF_STATIC_TLS;
1078 /* Fall through */
1079
1080 case R_390_GOT12:
26e41594 1081 case R_390_GOT16:
bd1ea41b 1082 case R_390_GOT20:
69fc87f1
MS		 1083 case R_390_GOT32:
1084 case R_390_GOT64:
1085 case R_390_GOTENT:
1086 case R_390_TLS_GD64:
1087 /* This symbol requires a global offset table entry. */
1088 switch (r_type)
1089 {
1090 default:
1091 case R_390_GOT12:
1092 case R_390_GOT16:
bd1ea41b 1093 case R_390_GOT20:
69fc87f1
MS		 1094 case R_390_GOT32:
1095 case R_390_GOTENT:
1096 tls_type = GOT_NORMAL;
1097 break;
1098 case R_390_TLS_GD64:
1099 tls_type = GOT_TLS_GD;
1100 break;
1101 case R_390_TLS_IE64:
1102 case R_390_TLS_GOTIE64:
1103 tls_type = GOT_TLS_IE;
1104 break;
1105 case R_390_TLS_GOTIE12:
bd1ea41b 1106 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1107 case R_390_TLS_IEENT:
1108 tls_type = GOT_TLS_IE_NLT;
1109 break;
1110 }
1111
1112 if (h != NULL)
1113 {
1114 h->got.refcount += 1;
1115 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1116 }
5236c819
MS		 1117 else
1118 {
1119 local_got_refcounts[r_symndx] += 1;
69fc87f1 1120 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
5236c819 1121 }
69fc87f1
MS		 1122 /* If a TLS symbol is accessed using IE at least once,
1123 there is no point to use dynamic model for it. */
1124 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1125 {
1126 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1127 {
1128 (*_bfd_error_handler)
1129 (_("%s: `%s' accessed both as normal and thread local symbol"),
1130 bfd_archive_filename (abfd), h->root.root.string);
1131 return FALSE;
1132 }
1133 if (old_tls_type > tls_type)
1134 tls_type = old_tls_type;
1135 }
1136
1137 if (old_tls_type != tls_type)
1138 {
1139 if (h != NULL)
1140 elf_s390_hash_entry (h)->tls_type = tls_type;
1141 else
1142 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1143 }
1144
1145 if (r_type != R_390_TLS_IE64)
1146 break;
1147 /* Fall through */
1148
1149 case R_390_TLS_LE64:
1150 if (!info->shared)
1151 break;
1152 info->flags |= DF_STATIC_TLS;
1153 /* Fall through */
ec338859 1154
947216bf
AM		 1155 case R_390_8:
1156 case R_390_16:
a85d7ed0
NC		 1157 case R_390_32:
1158 case R_390_64:
947216bf
AM		 1159 case R_390_PC16:
1160 case R_390_PC16DBL:
a85d7ed0
NC		 1161 case R_390_PC32:
1162 case R_390_PC32DBL:
1163 case R_390_PC64:
0451c93c
MS		 1164 if (h != NULL && !info->shared)
1165 {
1166 /* If this reloc is in a read-only section, we might
1167 need a copy reloc. We can't check reliably at this
1168 stage whether the section is read-only, as input
1169 sections have not yet been mapped to output sections.
1170 Tentatively set the flag for now, and correct in
1171 adjust_dynamic_symbol. */
1172 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
ec338859 1173
0451c93c
MS		 1174 /* We may need a .plt entry if the function this reloc
1175 refers to is in a shared lib. */
1176 h->plt.refcount += 1;
1177 }
ec338859 1178
a85d7ed0 1179 /* If we are creating a shared library, and this is a reloc
0451c93c
MS		 1180 against a global symbol, or a non PC relative reloc
1181 against a local symbol, then we need to copy the reloc
1182 into the shared library. However, if we are linking with
1183 -Bsymbolic, we do not need to copy a reloc against a
1184 global symbol which is defined in an object we are
1185 including in the link (i.e., DEF_REGULAR is set). At
1186 this point we have not seen all the input files, so it is
1187 possible that DEF_REGULAR is not set now but will be set
1188 later (it is never cleared). In case of a weak definition,
1189 DEF_REGULAR may be cleared later by a strong definition in
1190 a shared library. We account for that possibility below by
1191 storing information in the relocs_copied field of the hash
1192 table entry. A similar situation occurs when creating
1193 shared libraries and symbol visibility changes render the
1194 symbol local.
1195
1196 If on the other hand, we are creating an executable, we
1197 may need to keep relocations for symbols satisfied by a
1198 dynamic library if we manage to avoid copy relocs for the
1199 symbol. */
1200 if ((info->shared
1201 && (sec->flags & SEC_ALLOC) != 0
1202 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1203 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1204 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1207 || (h != NULL
1208 && (! info->symbolic
1209 || h->root.type == bfd_link_hash_defweak
1210 || (h->elf_link_hash_flags
1211 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
64285810
MS		 1212 || (ELIMINATE_COPY_RELOCS
1213 && !info->shared
0451c93c
MS		 1214 && (sec->flags & SEC_ALLOC) != 0
1215 && h != NULL
1216 && (h->root.type == bfd_link_hash_defweak
1217 || (h->elf_link_hash_flags
1218 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
a85d7ed0 1219 {
ec338859
AM		 1220 struct elf_s390_dyn_relocs *p;
1221 struct elf_s390_dyn_relocs **head;
1222
0451c93c
MS		 1223 /* We must copy these reloc types into the output file.
1224 Create a reloc section in dynobj and make room for
1225 this reloc. */
a85d7ed0
NC		 1226 if (sreloc == NULL)
1227 {
1228 const char *name;
0451c93c 1229 bfd *dynobj;
ec338859 1230
a85d7ed0
NC		 1231 name = (bfd_elf_string_from_elf_section
1232 (abfd,
1233 elf_elfheader (abfd)->e_shstrndx,
1234 elf_section_data (sec)->rel_hdr.sh_name));
1235 if (name == NULL)
b34976b6 1236 return FALSE;
ec338859 1237
0451c93c
MS		 1238 if (strncmp (name, ".rela", 5) != 0
1239 || strcmp (bfd_get_section_name (abfd, sec),
1240 name + 5) != 0)
1241 {
1242 (*_bfd_error_handler)
1243 (_("%s: bad relocation section name `%s\'"),
1244 bfd_archive_filename (abfd), name);
1245 }
ec338859 1246
0451c93c
MS		 1247 if (htab->elf.dynobj == NULL)
1248 htab->elf.dynobj = abfd;
a85d7ed0 1249
0451c93c 1250 dynobj = htab->elf.dynobj;
a85d7ed0
NC		 1251 sreloc = bfd_get_section_by_name (dynobj, name);
1252 if (sreloc == NULL)
1253 {
1254 flagword flags;
ec338859 1255
a85d7ed0
NC		 1256 sreloc = bfd_make_section (dynobj, name);
1257 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1258 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1259 if ((sec->flags & SEC_ALLOC) != 0)
1260 flags |= SEC_ALLOC | SEC_LOAD;
1261 if (sreloc == NULL
1262 || ! bfd_set_section_flags (dynobj, sreloc, flags)
99881371 1263 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
b34976b6 1264 return FALSE;
a85d7ed0 1265 }
0451c93c 1266 elf_section_data (sec)->sreloc = sreloc;
a85d7ed0 1267 }
ec338859 1268
0451c93c
MS		 1269 /* If this is a global symbol, we count the number of
1270 relocations we need for this symbol. */
1271 if (h != NULL)
a85d7ed0 1272 {
ec338859 1273 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
0451c93c
MS		 1274 }
1275 else
1276 {
ec338859
AM		 1277 /* Track dynamic relocs needed for local syms too.
1278 We really need local syms available to do this
1279 easily. Oh well. */
1280
1281 asection *s;
1282 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1283 sec, r_symndx);
1284 if (s == NULL)
b34976b6 1285 return FALSE;
ec338859
AM		 1286
1287 head = ((struct elf_s390_dyn_relocs **)
1288 &elf_section_data (s)->local_dynrel);
1289 }
1290
1291 p = *head;
1292 if (p == NULL || p->sec != sec)
1293 {
1294 bfd_size_type amt = sizeof *p;
1295 p = ((struct elf_s390_dyn_relocs *)
1296 bfd_alloc (htab->elf.dynobj, amt));
1297 if (p == NULL)
b34976b6 1298 return FALSE;
ec338859
AM		 1299 p->next = *head;
1300 *head = p;
1301 p->sec = sec;
1302 p->count = 0;
1303 p->pc_count = 0;
a85d7ed0 1304 }
ec338859
AM		 1305
1306 p->count += 1;
1307 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1308 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1309 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1310 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1311 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1312 p->pc_count += 1;
a85d7ed0 1313 }
a85d7ed0 1314 break;
ec338859 1315
a85d7ed0
NC		 1316 /* This relocation describes the C++ object vtable hierarchy.
1317 Reconstruct it for later use during GC. */
947216bf
AM		 1318 case R_390_GNU_VTINHERIT:
1319 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 1320 return FALSE;
947216bf 1321 break;
ec338859 1322
a85d7ed0
NC		 1323 /* This relocation describes which C++ vtable entries are actually
1324 used. Record for later use during GC. */
947216bf
AM		 1325 case R_390_GNU_VTENTRY:
1326 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 1327 return FALSE;
947216bf 1328 break;
ec338859 1329
a85d7ed0
NC		 1330 default:
1331 break;
1332 }
1333 }
1334
b34976b6 1335 return TRUE;
a85d7ed0
NC		 1336}
1337
1338/* Return the section that should be marked against GC for a given
1339 relocation. */
1340
1341static asection *
1e2f5b6e
AM		 1342elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1343 asection *sec;
a85d7ed0
NC		 1344 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1345 Elf_Internal_Rela *rel;
1346 struct elf_link_hash_entry *h;
1347 Elf_Internal_Sym *sym;
1348{
1349 if (h != NULL)
1350 {
1351 switch (ELF64_R_TYPE (rel->r_info))
1352 {
1353 case R_390_GNU_VTINHERIT:
1354 case R_390_GNU_VTENTRY:
1355 break;
1356
1357 default:
1358 switch (h->root.type)
1359 {
1360 case bfd_link_hash_defined:
1361 case bfd_link_hash_defweak:
1362 return h->root.u.def.section;
1363
1364 case bfd_link_hash_common:
1365 return h->root.u.c.p->section;
1366
1367 default:
1368 break;
1369 }
1370 }
1371 }
1372 else
1e2f5b6e 1373 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
a85d7ed0
NC		 1374
1375 return NULL;
1376}
1377
1378/* Update the got entry reference counts for the section being removed. */
1379
b34976b6 1380static bfd_boolean
a85d7ed0 1381elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
0451c93c
MS		 1382 bfd *abfd;
1383 struct bfd_link_info *info;
1384 asection *sec;
1385 const Elf_Internal_Rela *relocs;
a85d7ed0
NC		 1386{
1387 Elf_Internal_Shdr *symtab_hdr;
1388 struct elf_link_hash_entry **sym_hashes;
1389 bfd_signed_vma *local_got_refcounts;
1390 const Elf_Internal_Rela *rel, *relend;
a85d7ed0 1391
ec338859 1392 elf_section_data (sec)->local_dynrel = NULL;
a85d7ed0 1393
0451c93c
MS		 1394 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1395 sym_hashes = elf_sym_hashes (abfd);
1396 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0
NC		 1397
1398 relend = relocs + sec->reloc_count;
1399 for (rel = relocs; rel < relend; rel++)
5236c819 1400 {
26e41594
AM		 1401 unsigned long r_symndx;
1402 unsigned int r_type;
1403 struct elf_link_hash_entry *h = NULL;
1404
5236c819 1405 r_symndx = ELF64_R_SYM (rel->r_info);
26e41594
AM		 1406 if (r_symndx >= symtab_hdr->sh_info)
1407 {
1408 struct elf_s390_link_hash_entry *eh;
1409 struct elf_s390_dyn_relocs **pp;
1410 struct elf_s390_dyn_relocs *p;
5236c819 1411
26e41594
AM		 1412 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1413 eh = (struct elf_s390_link_hash_entry *) h;
5236c819 1414
26e41594
AM		 1415 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1416 if (p->sec == sec)
1417 {
1418 /* Everything must go for SEC. */
1419 *pp = p->next;
1420 break;
1421 }
1422 }
1423
1424 r_type = ELF64_R_TYPE (rel->r_info);
1425 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
69fc87f1 1426 switch (r_type)
5236c819 1427 {
69fc87f1
MS		 1428 case R_390_TLS_LDM64:
1429 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1430 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1431 break;
1432
1433 case R_390_TLS_GD64:
1434 case R_390_TLS_IE64:
1435 case R_390_TLS_GOTIE12:
bd1ea41b 1436 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1437 case R_390_TLS_GOTIE64:
1438 case R_390_TLS_IEENT:
5236c819
MS		 1439 case R_390_GOT12:
1440 case R_390_GOT16:
bd1ea41b 1441 case R_390_GOT20:
5236c819
MS		 1442 case R_390_GOT32:
1443 case R_390_GOT64:
1444 case R_390_GOTOFF16:
1445 case R_390_GOTOFF32:
1446 case R_390_GOTOFF64:
1447 case R_390_GOTPC:
1448 case R_390_GOTPCDBL:
1449 case R_390_GOTENT:
1450 if (h != NULL)
1451 {
1452 if (h->got.refcount > 0)
1453 h->got.refcount -= 1;
1454 }
1455 else if (local_got_refcounts != NULL)
1456 {
1457 if (local_got_refcounts[r_symndx] > 0)
1458 local_got_refcounts[r_symndx] -= 1;
1459 }
26e41594 1460 break;
a85d7ed0 1461
5236c819
MS		 1462 case R_390_8:
1463 case R_390_12:
1464 case R_390_16:
bd1ea41b 1465 case R_390_20:
5236c819
MS		 1466 case R_390_32:
1467 case R_390_64:
1468 case R_390_PC16:
1469 case R_390_PC16DBL:
1470 case R_390_PC32:
1471 case R_390_PC32DBL:
1472 case R_390_PC64:
26e41594
AM		 1473 if (info->shared)
1474 break;
1475 /* Fall through */
a85d7ed0 1476
69fc87f1
MS		 1477 case R_390_PLT16DBL:
1478 case R_390_PLT32:
1479 case R_390_PLT32DBL:
1480 case R_390_PLT64:
1481 case R_390_PLTOFF16:
1482 case R_390_PLTOFF32:
1483 case R_390_PLTOFF64:
1484 if (h != NULL)
1485 {
1486 if (h->plt.refcount > 0)
1487 h->plt.refcount -= 1;
1488 }
1489 break;
1490
1491 case R_390_GOTPLT12:
1492 case R_390_GOTPLT16:
bd1ea41b 1493 case R_390_GOTPLT20:
69fc87f1
MS		 1494 case R_390_GOTPLT32:
1495 case R_390_GOTPLT64:
1496 case R_390_GOTPLTENT:
1497 if (h != NULL)
1498 {
1499 if (h->plt.refcount > 0)
1500 {
1501 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1502 h->plt.refcount -= 1;
1503 }
1504 }
1505 else if (local_got_refcounts != NULL)
1506 {
1507 if (local_got_refcounts[r_symndx] > 0)
1508 local_got_refcounts[r_symndx] -= 1;
1509 }
1510 break;
1511
5236c819
MS		 1512 default:
1513 break;
1514 }
1515 }
a85d7ed0 1516
b34976b6 1517 return TRUE;
a85d7ed0
NC		 1518}
1519
5236c819
MS		 1520/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1521 entry but we found we will not create any. Called when we find we will
1522 not have any PLT for this symbol, by for example
1523 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1524 or elf_s390_size_dynamic_sections if no dynamic sections will be
1525 created (we're only linking static objects). */
1526
1527static void
1528elf_s390_adjust_gotplt (h)
1529 struct elf_s390_link_hash_entry *h;
1530{
1531 if (h->elf.root.type == bfd_link_hash_warning)
1532 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1533
1534 if (h->gotplt_refcount <= 0)
1535 return;
1536
1537 /* We simply add the number of gotplt references to the number
1538 * of got references for this symbol. */
1539 h->elf.got.refcount += h->gotplt_refcount;
1540 h->gotplt_refcount = -1;
1541}
1542
a85d7ed0
NC		 1543/* Adjust a symbol defined by a dynamic object and referenced by a
1544 regular object. The current definition is in some section of the
1545 dynamic object, but we're not including those sections. We have to
1546 change the definition to something the rest of the link can
1547 understand. */
1548
b34976b6 1549static bfd_boolean
a85d7ed0
NC		 1550elf_s390_adjust_dynamic_symbol (info, h)
1551 struct bfd_link_info *info;
1552 struct elf_link_hash_entry *h;
1553{
0451c93c 1554 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1555 asection *s;
1556 unsigned int power_of_two;
1557
a85d7ed0
NC		 1558 /* If this is a function, put it in the procedure linkage table. We
1559 will fill in the contents of the procedure linkage table later
cedb70c5 1560 (although we could actually do it here). */
a85d7ed0
NC		 1561 if (h->type == STT_FUNC
1562 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1563 {
0451c93c
MS		 1564 if (h->plt.refcount <= 0
1565 || (! info->shared
1566 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
f9cd9119
MS		 1567 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1568 && h->root.type != bfd_link_hash_undefweak
1569 && h->root.type != bfd_link_hash_undefined))
a85d7ed0
NC		 1570 {
1571 /* This case can occur if we saw a PLT32 reloc in an input
947216bf
AM		 1572 file, but the symbol was never referred to by a dynamic
1573 object, or if all references were garbage collected. In
0451c93c
MS		 1574 such a case, we don't actually need to build a procedure
1575 linkage table, and we can just do a PC32 reloc instead. */
a85d7ed0
NC		 1576 h->plt.offset = (bfd_vma) -1;
1577 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5236c819 1578 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
a85d7ed0
NC		 1579 }
1580
b34976b6 1581 return TRUE;
a85d7ed0 1582 }
bbd7ec4a 1583 else
0451c93c
MS		 1584 /* It's possible that we incorrectly decided a .plt reloc was
1585 needed for an R_390_PC32 reloc to a non-function sym in
1586 check_relocs. We can't decide accurately between function and
1587 non-function syms in check-relocs; Objects loaded later in
1588 the link may change h->type. So fix it now. */
bbd7ec4a 1589 h->plt.offset = (bfd_vma) -1;
a85d7ed0
NC		 1590
1591 /* If this is a weak symbol, and there is a real definition, the
1592 processor independent code will have arranged for us to see the
1593 real definition first, and we can just use the same value. */
1594 if (h->weakdef != NULL)
1595 {
1596 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1597 || h->weakdef->root.type == bfd_link_hash_defweak);
1598 h->root.u.def.section = h->weakdef->root.u.def.section;
1599 h->root.u.def.value = h->weakdef->root.u.def.value;
64285810
MS		 1600 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1601 h->elf_link_hash_flags
1602 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1603 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
b34976b6 1604 return TRUE;
a85d7ed0
NC		 1605 }
1606
1607 /* This is a reference to a symbol defined by a dynamic object which
1608 is not a function. */
1609
1610 /* If we are creating a shared library, we must presume that the
1611 only references to the symbol are via the global offset table.
1612 For such cases we need not do anything here; the relocations will
1613 be handled correctly by relocate_section. */
1614 if (info->shared)
b34976b6 1615 return TRUE;
a85d7ed0
NC		 1616
1617 /* If there are no references to this symbol that do not use the
1618 GOT, we don't need to generate a copy reloc. */
1619 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
b34976b6 1620 return TRUE;
a85d7ed0 1621
0451c93c
MS		 1622 /* If -z nocopyreloc was given, we won't generate them either. */
1623 if (info->nocopyreloc)
1624 {
1625 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
b34976b6 1626 return TRUE;
0451c93c
MS		 1627 }
1628
64285810 1629 if (ELIMINATE_COPY_RELOCS)
0451c93c 1630 {
64285810
MS		 1631 struct elf_s390_link_hash_entry * eh;
1632 struct elf_s390_dyn_relocs *p;
0451c93c 1633
64285810
MS		 1634 eh = (struct elf_s390_link_hash_entry *) h;
1635 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1636 {
1637 s = p->sec->output_section;
1638 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1639 break;
1640 }
1641
1642 /* If we didn't find any dynamic relocs in read-only sections, then
1643 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1644 if (p == NULL)
1645 {
1646 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1647 return TRUE;
1648 }
0451c93c
MS		 1649 }
1650
a85d7ed0
NC		 1651 /* We must allocate the symbol in our .dynbss section, which will
1652 become part of the .bss section of the executable. There will be
1653 an entry for this symbol in the .dynsym section. The dynamic
1654 object will contain position independent code, so all references
1655 from the dynamic object to this symbol will go through the global
1656 offset table. The dynamic linker will use the .dynsym entry to
1657 determine the address it must put in the global offset table, so
1658 both the dynamic object and the regular object will refer to the
1659 same memory location for the variable. */
1660
0451c93c 1661 htab = elf_s390_hash_table (info);
a85d7ed0 1662
0451c93c
MS		 1663 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1664 copy the initial value out of the dynamic object and into the
1665 runtime process image. */
a85d7ed0
NC		 1666 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1667 {
0451c93c 1668 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
a85d7ed0
NC		 1669 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1670 }
1671
1672 /* We need to figure out the alignment required for this symbol. I
1673 have no idea how ELF linkers handle this. */
1674 power_of_two = bfd_log2 (h->size);
1675 if (power_of_two > 3)
1676 power_of_two = 3;
1677
1678 /* Apply the required alignment. */
0451c93c
MS		 1679 s = htab->sdynbss;
1680 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1681 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
a85d7ed0 1682 {
0451c93c 1683 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
b34976b6 1684 return FALSE;
a85d7ed0
NC		 1685 }
1686
1687 /* Define the symbol as being at this point in the section. */
1688 h->root.u.def.section = s;
1689 h->root.u.def.value = s->_raw_size;
1690
1691 /* Increment the section size to make room for the symbol. */
1692 s->_raw_size += h->size;
1693
b34976b6 1694 return TRUE;
a85d7ed0
NC		 1695}
1696
0451c93c
MS		 1697/* This is the condition under which elf_s390_finish_dynamic_symbol
1698 will be called from elflink.h. If elflink.h doesn't call our
1699 finish_dynamic_symbol routine, we'll need to do something about
1700 initializing any .plt and .got entries in elf_s390_relocate_section. */
4ec72bde 1701#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
0451c93c 1702 ((DYN) \
4ec72bde 1703 && ((SHARED) \
0451c93c
MS		 1704 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1705 && ((H)->dynindx != -1 \
1706 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1707
1708/* Allocate space in .plt, .got and associated reloc sections for
1709 dynamic relocs. */
1710
b34976b6 1711static bfd_boolean
0451c93c
MS		 1712allocate_dynrelocs (h, inf)
1713 struct elf_link_hash_entry *h;
1714 PTR inf;
1715{
1716 struct bfd_link_info *info;
1717 struct elf_s390_link_hash_table *htab;
1718 struct elf_s390_link_hash_entry *eh;
1719 struct elf_s390_dyn_relocs *p;
1720
e92d460e 1721 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1722 return TRUE;
0451c93c 1723
e92d460e 1724 if (h->root.type == bfd_link_hash_warning)
5236c819
MS		 1725 /* When warning symbols are created, they **replace** the "real"
1726 entry in the hash table, thus we never get to see the real
1727 symbol in a hash traversal. So look at it now. */
e92d460e
AM		 1728 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1729
0451c93c
MS		 1730 info = (struct bfd_link_info *) inf;
1731 htab = elf_s390_hash_table (info);
1732
1733 if (htab->elf.dynamic_sections_created
82058a73
MS		 1734 && h->plt.refcount > 0
1735 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1736 || h->root.type != bfd_link_hash_undefweak))
0451c93c
MS		 1737 {
1738 /* Make sure this symbol is output as a dynamic symbol.
1739 Undefined weak syms won't yet be marked as dynamic. */
1740 if (h->dynindx == -1
1741 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1742 {
1743 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
b34976b6 1744 return FALSE;
0451c93c
MS		 1745 }
1746
82058a73 1747 if (info->shared
4ec72bde 1748 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
0451c93c
MS		 1749 {
1750 asection *s = htab->splt;
1751
1752 /* If this is the first .plt entry, make room for the special
1753 first entry. */
1754 if (s->_raw_size == 0)
1755 s->_raw_size += PLT_FIRST_ENTRY_SIZE;
1756
1757 h->plt.offset = s->_raw_size;
1758
1759 /* If this symbol is not defined in a regular file, and we are
1760 not generating a shared library, then set the symbol to this
1761 location in the .plt. This is required to make function
1762 pointers compare as equal between the normal executable and
1763 the shared library. */
1764 if (! info->shared
1765 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1766 {
1767 h->root.u.def.section = s;
1768 h->root.u.def.value = h->plt.offset;
1769 }
ec338859 1770
0451c93c
MS		 1771 /* Make room for this entry. */
1772 s->_raw_size += PLT_ENTRY_SIZE;
ec338859 1773
0451c93c
MS		 1774 /* We also need to make an entry in the .got.plt section, which
1775 will be placed in the .got section by the linker script. */
1776 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1777
1778 /* We also need to make an entry in the .rela.plt section. */
1779 htab->srelplt->_raw_size += sizeof (Elf64_External_Rela);
1780 }
1781 else
1782 {
1783 h->plt.offset = (bfd_vma) -1;
1784 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5236c819 1785 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1786 }
1787 }
1788 else
1789 {
1790 h->plt.offset = (bfd_vma) -1;
1791 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5236c819 1792 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1793 }
1794
69fc87f1
MS		 1795 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1796 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1797 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1798 we can save the dynamic TLS relocation. */
1799 if (h->got.refcount > 0
1800 && !info->shared
1801 && h->dynindx == -1
1802 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1803 {
1804 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1805 /* For the GOTIE access without a literal pool entry the offset has
1806 to be stored somewhere. The immediate value in the instruction
1807 is not bit enough so the value is stored in the got. */
1808 {
1809 h->got.offset = htab->sgot->_raw_size;
1810 htab->sgot->_raw_size += GOT_ENTRY_SIZE;
1811 }
1812 else
1813 h->got.offset = (bfd_vma) -1;
1814 }
1815 else if (h->got.refcount > 0)
0451c93c
MS		 1816 {
1817 asection *s;
b34976b6 1818 bfd_boolean dyn;
69fc87f1 1819 int tls_type = elf_s390_hash_entry(h)->tls_type;
0451c93c
MS		 1820
1821 /* Make sure this symbol is output as a dynamic symbol.
1822 Undefined weak syms won't yet be marked as dynamic. */
1823 if (h->dynindx == -1
1824 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1825 {
1826 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
b34976b6 1827 return FALSE;
0451c93c
MS		 1828 }
1829
1830 s = htab->sgot;
1831 h->got.offset = s->_raw_size;
1832 s->_raw_size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1833 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1834 if (tls_type == GOT_TLS_GD)
1835 s->_raw_size += GOT_ENTRY_SIZE;
0451c93c 1836 dyn = htab->elf.dynamic_sections_created;
69fc87f1
MS		 1837 /* R_390_TLS_IE64 needs one dynamic relocation,
1838 R_390_TLS_GD64 needs one if local symbol and two if global. */
1839 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1840 || tls_type >= GOT_TLS_IE)
1841 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1842 else if (tls_type == GOT_TLS_GD)
1843 htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela);
82058a73
MS		 1844 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1845 || h->root.type != bfd_link_hash_undefweak)
1846 && (info->shared
1847 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
0451c93c
MS		 1848 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1849 }
1850 else
1851 h->got.offset = (bfd_vma) -1;
1852
1853 eh = (struct elf_s390_link_hash_entry *) h;
1854 if (eh->dyn_relocs == NULL)
b34976b6 1855 return TRUE;
0451c93c
MS		 1856
1857 /* In the shared -Bsymbolic case, discard space allocated for
1858 dynamic pc-relative relocs against symbols which turn out to be
1859 defined in regular objects. For the normal shared case, discard
1860 space for pc-relative relocs that have become local due to symbol
1861 visibility changes. */
1862
1863 if (info->shared)
1864 {
1865 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1866 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1867 || info->symbolic))
1868 {
1869 struct elf_s390_dyn_relocs **pp;
1870
1871 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1872 {
1873 p->count -= p->pc_count;
1874 p->pc_count = 0;
1875 if (p->count == 0)
1876 *pp = p->next;
1877 else
1878 pp = &p->next;
1879 }
1880 }
82058a73
MS		 1881
1882 /* Also discard relocs on undefined weak syms with non-default
1883 visibility. */
1884 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1885 && h->root.type == bfd_link_hash_undefweak)
1886 eh->dyn_relocs = NULL;
0451c93c 1887 }
64285810 1888 else if (ELIMINATE_COPY_RELOCS)
0451c93c
MS		 1889 {
1890 /* For the non-shared case, discard space for relocs against
1891 symbols which turn out to need copy relocs or are not
1892 dynamic. */
1893
1894 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1895 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1896 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1897 || (htab->elf.dynamic_sections_created
1898 && (h->root.type == bfd_link_hash_undefweak
1899 || h->root.type == bfd_link_hash_undefined))))
1900 {
1901 /* Make sure this symbol is output as a dynamic symbol.
1902 Undefined weak syms won't yet be marked as dynamic. */
1903 if (h->dynindx == -1
1904 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1905 {
1906 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
b34976b6 1907 return FALSE;
0451c93c
MS		 1908 }
1909
1910 /* If that succeeded, we know we'll be keeping all the
1911 relocs. */
1912 if (h->dynindx != -1)
1913 goto keep;
1914 }
1915
1916 eh->dyn_relocs = NULL;
1917
ec338859 1918 keep: ;
0451c93c
MS		 1919 }
1920
1921 /* Finally, allocate space. */
1922 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1923 {
1924 asection *sreloc = elf_section_data (p->sec)->sreloc;
1925 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
1926 }
1927
b34976b6 1928 return TRUE;
0451c93c
MS		 1929}
1930
1931/* Find any dynamic relocs that apply to read-only sections. */
1932
b34976b6 1933static bfd_boolean
0451c93c
MS		 1934readonly_dynrelocs (h, inf)
1935 struct elf_link_hash_entry *h;
1936 PTR inf;
1937{
1938 struct elf_s390_link_hash_entry *eh;
1939 struct elf_s390_dyn_relocs *p;
1940
e92d460e
AM		 1941 if (h->root.type == bfd_link_hash_warning)
1942 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1943
0451c93c
MS		 1944 eh = (struct elf_s390_link_hash_entry *) h;
1945 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1946 {
1947 asection *s = p->sec->output_section;
1948
1949 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1950 {
1951 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1952
1953 info->flags |= DF_TEXTREL;
1954
1955 /* Not an error, just cut short the traversal. */
b34976b6 1956 return FALSE;
0451c93c
MS		 1957 }
1958 }
b34976b6 1959 return TRUE;
0451c93c
MS		 1960}
1961
a85d7ed0
NC		 1962/* Set the sizes of the dynamic sections. */
1963
b34976b6 1964static bfd_boolean
a85d7ed0 1965elf_s390_size_dynamic_sections (output_bfd, info)
29c2fb7c 1966 bfd *output_bfd ATTRIBUTE_UNUSED;
a85d7ed0
NC		 1967 struct bfd_link_info *info;
1968{
0451c93c 1969 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1970 bfd *dynobj;
1971 asection *s;
b34976b6 1972 bfd_boolean relocs;
0451c93c 1973 bfd *ibfd;
a85d7ed0 1974
0451c93c
MS		 1975 htab = elf_s390_hash_table (info);
1976 dynobj = htab->elf.dynobj;
1977 if (dynobj == NULL)
1978 abort ();
a85d7ed0 1979
0451c93c 1980 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 1981 {
1982 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 1983 if (info->executable)
a85d7ed0
NC		 1984 {
1985 s = bfd_get_section_by_name (dynobj, ".interp");
0451c93c
MS		 1986 if (s == NULL)
1987 abort ();
a85d7ed0
NC		 1988 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1989 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1990 }
1991 }
a85d7ed0 1992
0451c93c
MS		 1993 /* Set up .got offsets for local syms, and space for local dynamic
1994 relocs. */
1995 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
a85d7ed0 1996 {
0451c93c
MS		 1997 bfd_signed_vma *local_got;
1998 bfd_signed_vma *end_local_got;
69fc87f1 1999 char *local_tls_type;
0451c93c
MS		 2000 bfd_size_type locsymcount;
2001 Elf_Internal_Shdr *symtab_hdr;
2002 asection *srela;
a85d7ed0 2003
0451c93c 2004 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
a85d7ed0
NC		 2005 continue;
2006
0451c93c 2007 for (s = ibfd->sections; s != NULL; s = s->next)
a85d7ed0 2008 {
ec338859 2009 struct elf_s390_dyn_relocs *p;
0451c93c 2010
ec338859
AM		 2011 for (p = *((struct elf_s390_dyn_relocs **)
2012 &elf_section_data (s)->local_dynrel);
2013 p != NULL;
2014 p = p->next)
a85d7ed0 2015 {
ec338859
AM		 2016 if (!bfd_is_abs_section (p->sec)
2017 && bfd_is_abs_section (p->sec->output_section))
2018 {
2019 /* Input section has been discarded, either because
2020 it is a copy of a linkonce section or due to
2021 linker script /DISCARD/, so we'll be discarding
2022 the relocs too. */
2023 }
248866a8 2024 else if (p->count != 0)
ec338859
AM		 2025 {
2026 srela = elf_section_data (p->sec)->sreloc;
2027 srela->_raw_size += p->count * sizeof (Elf64_External_Rela);
248866a8
AM		 2028 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2029 info->flags |= DF_TEXTREL;
ec338859 2030 }
a85d7ed0
NC		 2031 }
2032 }
0451c93c
MS		 2033
2034 local_got = elf_local_got_refcounts (ibfd);
2035 if (!local_got)
2036 continue;
2037
2038 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2039 locsymcount = symtab_hdr->sh_info;
2040 end_local_got = local_got + locsymcount;
69fc87f1 2041 local_tls_type = elf_s390_local_got_tls_type (ibfd);
0451c93c
MS		 2042 s = htab->sgot;
2043 srela = htab->srelgot;
69fc87f1 2044 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
a85d7ed0 2045 {
0451c93c 2046 if (*local_got > 0)
a85d7ed0 2047 {
0451c93c
MS		 2048 *local_got = s->_raw_size;
2049 s->_raw_size += GOT_ENTRY_SIZE;
69fc87f1
MS		 2050 if (*local_tls_type == GOT_TLS_GD)
2051 s->_raw_size += GOT_ENTRY_SIZE;
0451c93c
MS		 2052 if (info->shared)
2053 srela->_raw_size += sizeof (Elf64_External_Rela);
a85d7ed0
NC		 2054 }
2055 else
0451c93c 2056 *local_got = (bfd_vma) -1;
a85d7ed0 2057 }
0451c93c
MS		 2058 }
2059
69fc87f1
MS		 2060 if (htab->tls_ldm_got.refcount > 0)
2061 {
2062 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2063 relocs. */
2064 htab->tls_ldm_got.offset = htab->sgot->_raw_size;
2065 htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
2066 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
2067 }
2068 else
2069 htab->tls_ldm_got.offset = -1;
2070
0451c93c
MS		 2071 /* Allocate global sym .plt and .got entries, and space for global
2072 sym dynamic relocs. */
2073 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2074
2075 /* We now have determined the sizes of the various dynamic sections.
2076 Allocate memory for them. */
b34976b6 2077 relocs = FALSE;
0451c93c
MS		 2078 for (s = dynobj->sections; s != NULL; s = s->next)
2079 {
2080 if ((s->flags & SEC_LINKER_CREATED) == 0)
2081 continue;
2082
2083 if (s == htab->splt
2084 || s == htab->sgot
2085 || s == htab->sgotplt)
2086 {
2087 /* Strip this section if we don't need it; see the
2088 comment below. */
2089 }
2090 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2091 {
2092 if (s->_raw_size != 0 && s != htab->srelplt)
b34976b6 2093 relocs = TRUE;
ec338859 2094
0451c93c
MS		 2095 /* We use the reloc_count field as a counter if we need
2096 to copy relocs into the output file. */
2097 s->reloc_count = 0;
2098 }
2099 else
a85d7ed0
NC		 2100 {
2101 /* It's not one of our sections, so don't allocate space. */
2102 continue;
2103 }
2104
0451c93c 2105 if (s->_raw_size == 0)
a85d7ed0 2106 {
0451c93c
MS		 2107 /* If we don't need this section, strip it from the
2108 output file. This is to handle .rela.bss and
2109 .rela.plt. We must create it in
2110 create_dynamic_sections, because it must be created
2111 before the linker maps input sections to output
2112 sections. The linker does that before
2113 adjust_dynamic_symbol is called, and it is that
2114 function which decides whether anything needs to go
2115 into these sections. */
2116
a85d7ed0
NC		 2117 _bfd_strip_section_from_output (info, s);
2118 continue;
2119 }
2120
0451c93c
MS		 2121 /* Allocate memory for the section contents. We use bfd_zalloc
2122 here in case unused entries are not reclaimed before the
2123 section's contents are written out. This should not happen,
2124 but this way if it does, we get a R_390_NONE reloc instead
2125 of garbage. */
2126 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2127 if (s->contents == NULL)
b34976b6 2128 return FALSE;
a85d7ed0
NC		 2129 }
2130
0451c93c 2131 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 2132 {
2133 /* Add some entries to the .dynamic section. We fill in the
2134 values later, in elf_s390_finish_dynamic_sections, but we
2135 must add the entries now so that we get the correct size for
2136 the .dynamic section. The DT_DEBUG entry is filled in by the
2137 dynamic linker and used by the debugger. */
dc810e39
AM		 2138#define add_dynamic_entry(TAG, VAL) \
2139 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
2140
36af4a4e 2141 if (info->executable)
a85d7ed0 2142 {
dc810e39 2143 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2144 return FALSE;
a85d7ed0
NC		 2145 }
2146
0451c93c 2147 if (htab->splt->_raw_size != 0)
a85d7ed0 2148 {
dc810e39
AM		 2149 if (!add_dynamic_entry (DT_PLTGOT, 0)
2150 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2151 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2152 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 2153 return FALSE;
a85d7ed0
NC		 2154 }
2155
2156 if (relocs)
947216bf
AM		 2157 {
2158 if (!add_dynamic_entry (DT_RELA, 0)
2159 || !add_dynamic_entry (DT_RELASZ, 0)
2160 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
b34976b6 2161 return FALSE;
ec338859 2162
0451c93c
MS		 2163 /* If any dynamic relocs apply to a read-only section,
2164 then we need a DT_TEXTREL entry. */
248866a8
AM		 2165 if ((info->flags & DF_TEXTREL) == 0)
2166 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2167 (PTR) info);
ec338859 2168
0451c93c
MS		 2169 if ((info->flags & DF_TEXTREL) != 0)
2170 {
2171 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2172 return FALSE;
0451c93c 2173 }
a85d7ed0
NC		 2174 }
2175 }
dc810e39 2176#undef add_dynamic_entry
a85d7ed0 2177
b34976b6 2178 return TRUE;
a85d7ed0
NC		 2179}
2180
69fc87f1
MS		 2181/* Return the base VMA address which should be subtracted from real addresses
2182 when resolving @dtpoff relocation.
2183 This is PT_TLS segment p_vaddr. */
2184
2185static bfd_vma
2186dtpoff_base (info)
2187 struct bfd_link_info *info;
2188{
2189 /* If tls_segment is NULL, we should have signalled an error already. */
2190 if (elf_hash_table (info)->tls_segment == NULL)
2191 return 0;
2192 return elf_hash_table (info)->tls_segment->start;
2193}
2194
2195/* Return the relocation value for @tpoff relocation
2196 if STT_TLS virtual address is ADDRESS. */
2197
2198static bfd_vma
2199tpoff (info, address)
2200 struct bfd_link_info *info;
2201 bfd_vma address;
2202{
2203 struct elf_link_tls_segment *tls_segment
2204 = elf_hash_table (info)->tls_segment;
2205
2206 /* If tls_segment is NULL, we should have signalled an error already. */
2207 if (tls_segment == NULL)
2208 return 0;
2209 return (align_power (tls_segment->size, tls_segment->align)
2210 + tls_segment->start - address);
2211}
2212
2213/* Complain if TLS instruction relocation is against an invalid
2214 instruction. */
2215
2216static void
2217invalid_tls_insn (input_bfd, input_section, rel)
2218 bfd *input_bfd;
2219 asection *input_section;
2220 Elf_Internal_Rela *rel;
2221{
2222 reloc_howto_type *howto;
2223
2224 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2225 (*_bfd_error_handler)
2226 (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"),
2227 bfd_archive_filename (input_bfd),
2228 bfd_get_section_name (input_bfd, input_section),
2229 (long) rel->r_offset,
2230 howto->name);
2231}
2232
a85d7ed0
NC		 2233/* Relocate a 390 ELF section. */
2234
b34976b6 2235static bfd_boolean
a85d7ed0
NC		 2236elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2237 contents, relocs, local_syms, local_sections)
2238 bfd *output_bfd;
2239 struct bfd_link_info *info;
2240 bfd *input_bfd;
2241 asection *input_section;
2242 bfd_byte *contents;
2243 Elf_Internal_Rela *relocs;
2244 Elf_Internal_Sym *local_syms;
2245 asection **local_sections;
2246{
0451c93c 2247 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 2248 Elf_Internal_Shdr *symtab_hdr;
2249 struct elf_link_hash_entry **sym_hashes;
2250 bfd_vma *local_got_offsets;
a85d7ed0
NC		 2251 Elf_Internal_Rela *rel;
2252 Elf_Internal_Rela *relend;
2253
1049f94e 2254 if (info->relocatable)
b34976b6 2255 return TRUE;
b491616a 2256
0451c93c 2257 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 2258 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2259 sym_hashes = elf_sym_hashes (input_bfd);
2260 local_got_offsets = elf_local_got_offsets (input_bfd);
2261
a85d7ed0
NC		 2262 rel = relocs;
2263 relend = relocs + input_section->reloc_count;
2264 for (; rel < relend; rel++)
2265 {
5236c819 2266 unsigned int r_type;
a85d7ed0
NC		 2267 reloc_howto_type *howto;
2268 unsigned long r_symndx;
2269 struct elf_link_hash_entry *h;
2270 Elf_Internal_Sym *sym;
2271 asection *sec;
0451c93c 2272 bfd_vma off;
a85d7ed0 2273 bfd_vma relocation;
b34976b6 2274 bfd_boolean unresolved_reloc;
a85d7ed0 2275 bfd_reloc_status_type r;
69fc87f1 2276 int tls_type;
a85d7ed0
NC		 2277
2278 r_type = ELF64_R_TYPE (rel->r_info);
0451c93c 2279 if (r_type == (int) R_390_GNU_VTINHERIT
947216bf
AM		 2280 || r_type == (int) R_390_GNU_VTENTRY)
2281 continue;
5236c819 2282 if (r_type >= (int) R_390_max)
a85d7ed0
NC		 2283 {
2284 bfd_set_error (bfd_error_bad_value);
b34976b6 2285 return FALSE;
a85d7ed0 2286 }
a85d7ed0 2287
b491616a 2288 howto = elf_howto_table + r_type;
a85d7ed0 2289 r_symndx = ELF64_R_SYM (rel->r_info);
5236c819
MS		 2290
2291 /* This is a final link. */
a85d7ed0
NC		 2292 h = NULL;
2293 sym = NULL;
2294 sec = NULL;
b34976b6 2295 unresolved_reloc = FALSE;
a85d7ed0
NC		 2296 if (r_symndx < symtab_hdr->sh_info)
2297 {
2298 sym = local_syms + r_symndx;
2299 sec = local_sections[r_symndx];
f8df10f4 2300 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
a85d7ed0
NC		 2301 }
2302 else
2303 {
2304 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2305 while (h->root.type == bfd_link_hash_indirect
2306 || h->root.type == bfd_link_hash_warning)
2307 h = (struct elf_link_hash_entry *) h->root.u.i.link;
0451c93c 2308
a85d7ed0
NC		 2309 if (h->root.type == bfd_link_hash_defined
2310 || h->root.type == bfd_link_hash_defweak)
2311 {
2312 sec = h->root.u.def.section;
27018c3f 2313 if (sec->output_section == NULL)
a85d7ed0 2314 {
0451c93c
MS		 2315 /* Set a flag that will be cleared later if we find a
2316 relocation value for this symbol. output_section
2317 is typically NULL for symbols satisfied by a shared
2318 library. */
b34976b6 2319 unresolved_reloc = TRUE;
a85d7ed0
NC		 2320 relocation = 0;
2321 }
2322 else
2323 relocation = (h->root.u.def.value
2324 + sec->output_section->vma
2325 + sec->output_offset);
2326 }
2327 else if (h->root.type == bfd_link_hash_undefweak)
2328 relocation = 0;
9203ba99 2329 else if (!info->executable
a85d7ed0
NC		 2330 && !info->no_undefined
2331 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2332 relocation = 0;
2333 else
2334 {
2335 if (! ((*info->callbacks->undefined_symbol)
2336 (info, h->root.root.string, input_bfd,
947216bf 2337 input_section, rel->r_offset,
0451c93c
MS		 2338 (!info->shared || info->no_undefined
2339 || ELF_ST_VISIBILITY (h->other)))))
b34976b6 2340 return FALSE;
a85d7ed0
NC		 2341 relocation = 0;
2342 }
2343 }
2344
2345 switch (r_type)
2346 {
5236c819
MS		 2347 case R_390_GOTPLT12:
2348 case R_390_GOTPLT16:
bd1ea41b 2349 case R_390_GOTPLT20:
5236c819
MS		 2350 case R_390_GOTPLT32:
2351 case R_390_GOTPLT64:
2352 case R_390_GOTPLTENT:
2353 /* There are three cases for a GOTPLT relocation. 1) The
2354 relocation is against the jump slot entry of a plt that
2355 will get emitted to the output file. 2) The relocation
2356 is against the jump slot of a plt entry that has been
2357 removed. elf_s390_adjust_gotplt has created a GOT entry
2358 as replacement. 3) The relocation is against a local symbol.
2359 Cases 2) and 3) are the same as the GOT relocation code
2360 so we just have to test for case 1 and fall through for
2361 the other two. */
2362 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2363 {
2364 bfd_vma plt_index;
2365
2366 /* Calc. index no.
2367 Current offset - size first entry / entry size. */
2368 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2369 PLT_ENTRY_SIZE;
26e41594 2370
5236c819
MS		 2371 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2372 addr & GOT addr. */
2373 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2374 unresolved_reloc = FALSE;
2375
2376 if (r_type == R_390_GOTPLTENT)
26e41594 2377 relocation += htab->sgot->output_section->vma;
5236c819
MS		 2378 break;
2379 }
2380 /* Fall through. */
2381
947216bf
AM		 2382 case R_390_GOT12:
2383 case R_390_GOT16:
bd1ea41b 2384 case R_390_GOT20:
947216bf
AM		 2385 case R_390_GOT32:
2386 case R_390_GOT64:
2387 case R_390_GOTENT:
2388 /* Relocation is to the entry for this symbol in the global
2389 offset table. */
0451c93c
MS		 2390 if (htab->sgot == NULL)
2391 abort ();
a85d7ed0 2392
947216bf
AM		 2393 if (h != NULL)
2394 {
b34976b6 2395 bfd_boolean dyn;
a85d7ed0 2396
947216bf 2397 off = h->got.offset;
0451c93c 2398 dyn = htab->elf.dynamic_sections_created;
4ec72bde 2399 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
947216bf
AM		 2400 || (info->shared
2401 && (info->symbolic
0451c93c
MS		 2402 || h->dynindx == -1
2403 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
82058a73
MS		 2404 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2405 || (ELF_ST_VISIBILITY (h->other)
2406 && h->root.type == bfd_link_hash_undefweak))
947216bf
AM		 2407 {
2408 /* This is actually a static link, or it is a
2409 -Bsymbolic link and the symbol is defined
2410 locally, or the symbol was forced to be local
2411 because of a version file. We must initialize
2412 this entry in the global offset table. Since the
2413 offset must always be a multiple of 2, we use the
2414 least significant bit to record whether we have
2415 initialized it already.
2416
2417 When doing a dynamic link, we create a .rel.got
2418 relocation entry to initialize the value. This
2419 is done in the finish_dynamic_symbol routine. */
2420 if ((off & 1) != 0)
2421 off &= ~1;
2422 else
2423 {
a85d7ed0 2424 bfd_put_64 (output_bfd, relocation,
0451c93c 2425 htab->sgot->contents + off);
947216bf
AM		 2426 h->got.offset |= 1;
2427 }
2428 }
0451c93c 2429 else
b34976b6 2430 unresolved_reloc = FALSE;
947216bf
AM		 2431 }
2432 else
2433 {
0451c93c
MS		 2434 if (local_got_offsets == NULL)
2435 abort ();
a85d7ed0 2436
947216bf 2437 off = local_got_offsets[r_symndx];
a85d7ed0 2438
947216bf
AM		 2439 /* The offset must always be a multiple of 8. We use
2440 the least significant bit to record whether we have
2441 already generated the necessary reloc. */
2442 if ((off & 1) != 0)
2443 off &= ~1;
2444 else
2445 {
2446 bfd_put_64 (output_bfd, relocation,
0451c93c 2447 htab->sgot->contents + off);
a85d7ed0 2448
947216bf
AM		 2449 if (info->shared)
2450 {
2451 asection *s;
2452 Elf_Internal_Rela outrel;
2453 bfd_byte *loc;
a85d7ed0 2454
947216bf
AM		 2455 s = htab->srelgot;
2456 if (s == NULL)
0451c93c 2457 abort ();
a85d7ed0 2458
947216bf
AM		 2459 outrel.r_offset = (htab->sgot->output_section->vma
2460 + htab->sgot->output_offset
2461 + off);
2462 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
a85d7ed0 2463 outrel.r_addend = relocation;
947216bf
AM		 2464 loc = s->contents;
2465 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2466 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2467 }
a85d7ed0 2468
947216bf
AM		 2469 local_got_offsets[r_symndx] |= 1;
2470 }
2471 }
a85d7ed0 2472
0451c93c
MS		 2473 if (off >= (bfd_vma) -2)
2474 abort ();
2475
2476 relocation = htab->sgot->output_offset + off;
2477
ae9a127f
NC		 2478 /* For @GOTENT the relocation is against the offset between
2479 the instruction and the symbols entry in the GOT and not
2480 between the start of the GOT and the symbols entry. We
2481 add the vma of the GOT to get the correct value. */
5236c819
MS		 2482 if ( r_type == R_390_GOTENT
2483 || r_type == R_390_GOTPLTENT)
0451c93c 2484 relocation += htab->sgot->output_section->vma;
a85d7ed0 2485
947216bf 2486 break;
99c79b2e 2487
5236c819
MS		 2488 case R_390_GOTOFF16:
2489 case R_390_GOTOFF32:
2490 case R_390_GOTOFF64:
947216bf
AM		 2491 /* Relocation is relative to the start of the global offset
2492 table. */
a85d7ed0 2493
947216bf
AM		 2494 /* Note that sgot->output_offset is not involved in this
2495 calculation. We always want the start of .got. If we
2496 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2497 permitted by the ABI, we might have to change this
2498 calculation. */
2499 relocation -= htab->sgot->output_section->vma;
947216bf 2500 break;
a85d7ed0 2501
947216bf 2502 case R_390_GOTPC:
a85d7ed0 2503 case R_390_GOTPCDBL:
947216bf
AM		 2504 /* Use global offset table as symbol value. */
2505 relocation = htab->sgot->output_section->vma;
b34976b6 2506 unresolved_reloc = FALSE;
947216bf 2507 break;
a85d7ed0 2508
947216bf
AM		 2509 case R_390_PLT16DBL:
2510 case R_390_PLT32:
2511 case R_390_PLT32DBL:
2512 case R_390_PLT64:
2513 /* Relocation is to the entry for this symbol in the
2514 procedure linkage table. */
a85d7ed0 2515
947216bf
AM		 2516 /* Resolve a PLT32 reloc against a local symbol directly,
2517 without using the procedure linkage table. */
2518 if (h == NULL)
2519 break;
a85d7ed0 2520
947216bf 2521 if (h->plt.offset == (bfd_vma) -1
0451c93c 2522 || htab->splt == NULL)
947216bf
AM		 2523 {
2524 /* We didn't make a PLT entry for this symbol. This
2525 happens when statically linking PIC code, or when
2526 using -Bsymbolic. */
2527 break;
2528 }
2529
2530 relocation = (htab->splt->output_section->vma
2531 + htab->splt->output_offset
2532 + h->plt.offset);
b34976b6 2533 unresolved_reloc = FALSE;
26e41594 2534 break;
5236c819
MS		 2535
2536 case R_390_PLTOFF16:
2537 case R_390_PLTOFF32:
2538 case R_390_PLTOFF64:
26e41594
AM		 2539 /* Relocation is to the entry for this symbol in the
2540 procedure linkage table relative to the start of the GOT. */
5236c819
MS		 2541
2542 /* For local symbols or if we didn't make a PLT entry for
2543 this symbol resolve the symbol directly. */
26e41594 2544 if ( h == NULL
5236c819
MS		 2545 || h->plt.offset == (bfd_vma) -1
2546 || htab->splt == NULL)
2547 {
2548 relocation -= htab->sgot->output_section->vma;
2549 break;
2550 }
2551
26e41594
AM		 2552 relocation = (htab->splt->output_section->vma
2553 + htab->splt->output_offset
2554 + h->plt.offset
5236c819
MS		 2555 - htab->sgot->output_section->vma);
2556 unresolved_reloc = FALSE;
947216bf
AM		 2557 break;
2558
2559 case R_390_8:
2560 case R_390_16:
2561 case R_390_32:
2562 case R_390_64:
2563 case R_390_PC16:
2564 case R_390_PC16DBL:
2565 case R_390_PC32:
a85d7ed0 2566 case R_390_PC32DBL:
947216bf 2567 case R_390_PC64:
ec338859
AM		 2568 /* r_symndx will be zero only for relocs against symbols
2569 from removed linkonce sections, or sections discarded by
2570 a linker script. */
947216bf
AM		 2571 if (r_symndx == 0
2572 || (input_section->flags & SEC_ALLOC) == 0)
ec338859
AM		 2573 break;
2574
947216bf 2575 if ((info->shared
82058a73
MS		 2576 && (h == NULL
2577 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2578 || h->root.type != bfd_link_hash_undefweak)
0451c93c
MS		 2579 && ((r_type != R_390_PC16
2580 && r_type != R_390_PC16DBL
2581 && r_type != R_390_PC32
2582 && r_type != R_390_PC32DBL
2583 && r_type != R_390_PC64)
2584 || (h != NULL
2585 && h->dynindx != -1
2586 && (! info->symbolic
2587 || (h->elf_link_hash_flags
2588 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
64285810
MS		 2589 || (ELIMINATE_COPY_RELOCS
2590 && !info->shared
0451c93c
MS		 2591 && h != NULL
2592 && h->dynindx != -1
2593 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2594 && (((h->elf_link_hash_flags
2595 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2596 && (h->elf_link_hash_flags
2597 & ELF_LINK_HASH_DEF_REGULAR) == 0)
2598 || h->root.type == bfd_link_hash_undefweak
2599 || h->root.type == bfd_link_hash_undefined)))
947216bf
AM		 2600 {
2601 Elf_Internal_Rela outrel;
b34976b6 2602 bfd_boolean skip, relocate;
0451c93c 2603 asection *sreloc;
947216bf 2604 bfd_byte *loc;
a85d7ed0 2605
947216bf
AM		 2606 /* When generating a shared object, these relocations
2607 are copied into the output file to be resolved at run
2608 time. */
b34976b6
AM		 2609 skip = FALSE;
2610 relocate = FALSE;
a85d7ed0 2611
c629eae0
JJ		 2612 outrel.r_offset =
2613 _bfd_elf_section_offset (output_bfd, info, input_section,
2614 rel->r_offset);
2615 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2616 skip = TRUE;
0bb2d96a 2617 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2618 skip = TRUE, relocate = TRUE;
a85d7ed0 2619
947216bf
AM		 2620 outrel.r_offset += (input_section->output_section->vma
2621 + input_section->output_offset);
a85d7ed0 2622
947216bf 2623 if (skip)
0bb2d96a 2624 memset (&outrel, 0, sizeof outrel);
947216bf 2625 else if (h != NULL
0451c93c
MS		 2626 && h->dynindx != -1
2627 && (r_type == R_390_PC16
2628 || r_type == R_390_PC16DBL
2629 || r_type == R_390_PC32
2630 || r_type == R_390_PC32DBL
2631 || r_type == R_390_PC64
2632 || !info->shared
2633 || !info->symbolic
2634 || (h->elf_link_hash_flags
2635 & ELF_LINK_HASH_DEF_REGULAR) == 0))
947216bf
AM		 2636 {
2637 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
27018c3f 2638 outrel.r_addend = rel->r_addend;
947216bf
AM		 2639 }
2640 else
2641 {
0451c93c 2642 /* This symbol is local, or marked to become local. */
b34976b6 2643 relocate = TRUE;
0451c93c
MS		 2644 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2645 outrel.r_addend = relocation + rel->r_addend;
2646 }
a85d7ed0 2647
0451c93c
MS		 2648 sreloc = elf_section_data (input_section)->sreloc;
2649 if (sreloc == NULL)
2650 abort ();
2651
947216bf
AM		 2652 loc = sreloc->contents;
2653 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2654 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
a85d7ed0 2655
947216bf
AM		 2656 /* If this reloc is against an external symbol, we do
2657 not want to fiddle with the addend. Otherwise, we
2658 need to include the symbol value so that it becomes
2659 an addend for the dynamic reloc. */
2660 if (! relocate)
2661 continue;
2662 }
a85d7ed0 2663
947216bf 2664 break;
a85d7ed0 2665
69fc87f1
MS		 2666 /* Relocations for tls literal pool entries. */
2667 case R_390_TLS_IE64:
2668 if (info->shared)
2669 {
2670 Elf_Internal_Rela outrel;
2671 asection *sreloc;
2672 bfd_byte *loc;
2673
2674 outrel.r_offset = rel->r_offset
2675 + input_section->output_section->vma
2676 + input_section->output_offset;
2677 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2678 sreloc = elf_section_data (input_section)->sreloc;
2679 if (sreloc == NULL)
2680 abort ();
2681 loc = sreloc->contents;
2682 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2683 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2684 }
ae9a127f 2685 /* Fall through. */
69fc87f1
MS		 2686
2687 case R_390_TLS_GD64:
2688 case R_390_TLS_GOTIE64:
2689 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2690 tls_type = GOT_UNKNOWN;
2691 if (h == NULL && local_got_offsets)
2692 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2693 else if (h != NULL)
2694 {
2695 tls_type = elf_s390_hash_entry(h)->tls_type;
2696 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2697 r_type = R_390_TLS_LE64;
2698 }
2699 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2700 r_type = R_390_TLS_IE64;
2701
2702 if (r_type == R_390_TLS_LE64)
2703 {
2704 /* This relocation gets optimized away by the local exec
2705 access optimization. */
2706 BFD_ASSERT (! unresolved_reloc);
2707 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2708 contents + rel->r_offset);
2709 continue;
2710 }
2711
2712 if (htab->sgot == NULL)
2713 abort ();
2714
2715 if (h != NULL)
2716 off = h->got.offset;
2717 else
2718 {
2719 if (local_got_offsets == NULL)
2720 abort ();
2721
2722 off = local_got_offsets[r_symndx];
2723 }
2724
2725 emit_tls_relocs:
2726
2727 if ((off & 1) != 0)
2728 off &= ~1;
26e41594 2729 else
69fc87f1
MS		 2730 {
2731 Elf_Internal_Rela outrel;
2732 bfd_byte *loc;
2733 int dr_type, indx;
2734
2735 if (htab->srelgot == NULL)
2736 abort ();
2737
2738 outrel.r_offset = (htab->sgot->output_section->vma
2739 + htab->sgot->output_offset + off);
2740
2741 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2742 if (r_type == R_390_TLS_GD64)
2743 dr_type = R_390_TLS_DTPMOD;
2744 else
2745 dr_type = R_390_TLS_TPOFF;
2746 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2747 outrel.r_addend = relocation - dtpoff_base (info);
2748 else
2749 outrel.r_addend = 0;
2750 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2751 loc = htab->srelgot->contents;
2752 loc += htab->srelgot->reloc_count++
2753 * sizeof (Elf64_External_Rela);
2754 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2755
2756 if (r_type == R_390_TLS_GD64)
2757 {
2758 if (indx == 0)
2759 {
2760 BFD_ASSERT (! unresolved_reloc);
2761 bfd_put_64 (output_bfd,
2762 relocation - dtpoff_base (info),
2763 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2764 }
2765 else
2766 {
2767 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2768 outrel.r_offset += GOT_ENTRY_SIZE;
2769 outrel.r_addend = 0;
2770 htab->srelgot->reloc_count++;
2771 loc += sizeof (Elf64_External_Rela);
2772 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2773 }
2774 }
2775
2776 if (h != NULL)
2777 h->got.offset |= 1;
2778 else
2779 local_got_offsets[r_symndx] |= 1;
2780 }
2781
2782 if (off >= (bfd_vma) -2)
2783 abort ();
2784 if (r_type == ELF64_R_TYPE (rel->r_info))
2785 {
2786 relocation = htab->sgot->output_offset + off;
2787 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2788 relocation += htab->sgot->output_section->vma;
2789 unresolved_reloc = FALSE;
2790 }
2791 else
2792 {
2793 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2794 contents + rel->r_offset);
2795 continue;
2796 }
2797 break;
2798
2799 case R_390_TLS_GOTIE12:
bd1ea41b 2800 case R_390_TLS_GOTIE20:
69fc87f1
MS		 2801 case R_390_TLS_IEENT:
2802 if (h == NULL)
2803 {
2804 if (local_got_offsets == NULL)
2805 abort();
2806 off = local_got_offsets[r_symndx];
2807 if (info->shared)
2808 goto emit_tls_relocs;
2809 }
2810 else
2811 {
2812 off = h->got.offset;
2813 tls_type = elf_s390_hash_entry(h)->tls_type;
2814 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2815 goto emit_tls_relocs;
2816 }
2817
2818 if (htab->sgot == NULL)
2819 abort ();
2820
2821 BFD_ASSERT (! unresolved_reloc);
2822 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2823 htab->sgot->contents + off);
2824 relocation = htab->sgot->output_offset + off;
2825 if (r_type == R_390_TLS_IEENT)
2826 relocation += htab->sgot->output_section->vma;
2827 unresolved_reloc = FALSE;
2828 break;
2829
2830 case R_390_TLS_LDM64:
2831 if (! info->shared)
2832 /* The literal pool entry this relocation refers to gets ignored
2833 by the optimized code of the local exec model. Do nothing
2834 and the value will turn out zero. */
2835 continue;
2836
2837 if (htab->sgot == NULL)
2838 abort ();
2839
2840 off = htab->tls_ldm_got.offset;
2841 if (off & 1)
2842 off &= ~1;
2843 else
2844 {
2845 Elf_Internal_Rela outrel;
2846 bfd_byte *loc;
2847
2848 if (htab->srelgot == NULL)
2849 abort ();
2850
2851 outrel.r_offset = (htab->sgot->output_section->vma
2852 + htab->sgot->output_offset + off);
2853
2854 bfd_put_64 (output_bfd, 0,
2855 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2856 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2857 outrel.r_addend = 0;
2858 loc = htab->srelgot->contents;
2859 loc += htab->srelgot->reloc_count++
2860 * sizeof (Elf64_External_Rela);
2861 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2862 htab->tls_ldm_got.offset |= 1;
2863 }
2864 relocation = htab->sgot->output_offset + off;
26e41594 2865 unresolved_reloc = FALSE;
69fc87f1
MS		 2866 break;
2867
2868 case R_390_TLS_LE64:
2869 if (info->shared)
2870 {
2871 /* Linking a shared library with non-fpic code requires
2872 a R_390_TLS_TPOFF relocation. */
2873 Elf_Internal_Rela outrel;
2874 asection *sreloc;
2875 bfd_byte *loc;
2876 int indx;
2877
2878 outrel.r_offset = rel->r_offset
2879 + input_section->output_section->vma
2880 + input_section->output_offset;
2881 if (h != NULL && h->dynindx != -1)
2882 indx = h->dynindx;
2883 else
2884 indx = 0;
2885 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2886 if (indx == 0)
2887 outrel.r_addend = relocation - dtpoff_base (info);
2888 else
2889 outrel.r_addend = 0;
2890 sreloc = elf_section_data (input_section)->sreloc;
2891 if (sreloc == NULL)
2892 abort ();
2893 loc = sreloc->contents;
2894 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2895 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2896 }
2897 else
2898 {
2899 BFD_ASSERT (! unresolved_reloc);
2900 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2901 contents + rel->r_offset);
2902 }
2903 continue;
2904
2905 case R_390_TLS_LDO64:
2906 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2907 relocation -= dtpoff_base (info);
2908 else
2909 /* When converting LDO to LE, we must negate. */
2910 relocation = -tpoff (info, relocation);
2911 break;
2912
2913 /* Relocations for tls instructions. */
2914 case R_390_TLS_LOAD:
2915 case R_390_TLS_GDCALL:
2916 case R_390_TLS_LDCALL:
2917 tls_type = GOT_UNKNOWN;
2918 if (h == NULL && local_got_offsets)
2919 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2920 else if (h != NULL)
2921 tls_type = elf_s390_hash_entry(h)->tls_type;
2922
2923 if (tls_type == GOT_TLS_GD)
2924 continue;
2925
2926 if (r_type == R_390_TLS_LOAD)
2927 {
2928 if (!info->shared && (h == NULL || h->dynindx == -1))
2929 {
2930 /* IE->LE transition. Four valid cases:
2931 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2932 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2933 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2934 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2935 unsigned int insn0, insn1, ry;
2936
2937 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2938 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2939 if (insn1 != 0x0004)
2940 invalid_tls_insn (input_bfd, input_section, rel);
2941 ry = 0;
2942 if ((insn0 & 0xff00f000) == 0xe3000000)
2943 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2944 ry = (insn0 & 0x000f0000);
2945 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2946 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2947 ry = (insn0 & 0x0000f000) << 4;
2948 else if ((insn0 & 0xff00f000) == 0xe300c000)
2949 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2950 ry = (insn0 & 0x000f0000);
2951 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2952 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2953 ry = (insn0 & 0x0000f000) << 4;
2954 else
2955 invalid_tls_insn (input_bfd, input_section, rel);
2956 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2957 insn1 = 0x000d;
2958 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2959 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2960 }
2961 }
2962 else if (r_type == R_390_TLS_GDCALL)
2963 {
2964 unsigned int insn0, insn1;
2965
2966 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2967 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2968 if ((insn0 & 0xffff0000) != 0xc0e50000)
2969 invalid_tls_insn (input_bfd, input_section, rel);
2970 if (!info->shared && (h == NULL || h->dynindx == -1))
2971 {
2972 /* GD->LE transition.
2973 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2974 insn0 = 0xc0040000;
2975 insn1 = 0x0000;
2976 }
2977 else
2978 {
2979 /* GD->IE transition.
2980 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2981 insn0 = 0xe322c000;
2982 insn1 = 0x0004;
2983 }
2984 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2985 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2986 }
2987 else if (r_type == R_390_TLS_LDCALL)
2988 {
2989 if (!info->shared)
2990 {
2991 unsigned int insn0, insn1;
2992
2993 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2994 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2995 if ((insn0 & 0xffff0000) != 0xc0e50000)
2996 invalid_tls_insn (input_bfd, input_section, rel);
2997 /* LD->LE transition.
2998 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2999 insn0 = 0xc0040000;
3000 insn1 = 0x0000;
3001 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3002 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3003 }
3004 }
3005 continue;
3006
947216bf
AM		 3007 default:
3008 break;
3009 }
a85d7ed0 3010
239e1f3a
AM		 3011 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3012 because such sections are not SEC_ALLOC and thus ld.so will
3013 not process them. */
0451c93c 3014 if (unresolved_reloc
239e1f3a 3015 && !((input_section->flags & SEC_DEBUGGING) != 0
0451c93c
MS		 3016 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
3017 (*_bfd_error_handler)
3018 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
3019 bfd_archive_filename (input_bfd),
3020 bfd_get_section_name (input_bfd, input_section),
3021 (long) rel->r_offset,
3022 h->root.root.string);
3023
bd1ea41b
MS		 3024 if (r_type == R_390_20
3025 || r_type == R_390_GOT20
3026 || r_type == R_390_GOTPLT20
3027 || r_type == R_390_TLS_GOTIE20)
3028 {
3029 relocation += rel->r_addend;
3030 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3031 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3032 contents, rel->r_offset,
3033 relocation, 0);
3034 }
3035 else
3036 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
a85d7ed0
NC		 3037 contents, rel->r_offset,
3038 relocation, rel->r_addend);
3039
3040 if (r != bfd_reloc_ok)
3041 {
0451c93c 3042 const char *name;
ec338859 3043
0451c93c
MS		 3044 if (h != NULL)
3045 name = h->root.root.string;
3046 else
a85d7ed0 3047 {
0451c93c
MS		 3048 name = bfd_elf_string_from_elf_section (input_bfd,
3049 symtab_hdr->sh_link,
3050 sym->st_name);
3051 if (name == NULL)
b34976b6 3052 return FALSE;
0451c93c
MS		 3053 if (*name == '\0')
3054 name = bfd_section_name (input_bfd, sec);
3055 }
ec338859 3056
0451c93c
MS		 3057 if (r == bfd_reloc_overflow)
3058 {
ec338859 3059
0451c93c
MS		 3060 if (! ((*info->callbacks->reloc_overflow)
3061 (info, name, howto->name, (bfd_vma) 0,
3062 input_bfd, input_section, rel->r_offset)))
b34976b6 3063 return FALSE;
0451c93c
MS		 3064 }
3065 else
3066 {
3067 (*_bfd_error_handler)
3068 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
3069 bfd_archive_filename (input_bfd),
3070 bfd_get_section_name (input_bfd, input_section),
3071 (long) rel->r_offset, name, (int) r);
b34976b6 3072 return FALSE;
a85d7ed0
NC		 3073 }
3074 }
3075 }
3076
b34976b6 3077 return TRUE;
a85d7ed0
NC		 3078}
3079
3080/* Finish up dynamic symbol handling. We set the contents of various
3081 dynamic sections here. */
3082
b34976b6 3083static bfd_boolean
a85d7ed0
NC		 3084elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3085 bfd *output_bfd;
3086 struct bfd_link_info *info;
3087 struct elf_link_hash_entry *h;
3088 Elf_Internal_Sym *sym;
3089{
0451c93c 3090 struct elf_s390_link_hash_table *htab;
a85d7ed0 3091
0451c93c 3092 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 3093
3094 if (h->plt.offset != (bfd_vma) -1)
3095 {
a85d7ed0 3096 bfd_vma plt_index;
0451c93c
MS		 3097 bfd_vma got_offset;
3098 Elf_Internal_Rela rela;
947216bf 3099 bfd_byte *loc;
a85d7ed0
NC		 3100
3101 /* This symbol has an entry in the procedure linkage table. Set
947216bf 3102 it up. */
a85d7ed0 3103
0451c93c
MS		 3104 if (h->dynindx == -1
3105 || htab->splt == NULL
3106 || htab->sgotplt == NULL
3107 || htab->srelplt == NULL)
3108 abort ();
a85d7ed0 3109
99c79b2e 3110 /* Calc. index no.
947216bf 3111 Current offset - size first entry / entry size. */
a85d7ed0
NC		 3112 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3113
3114 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
947216bf 3115 addr & GOT addr. */
a85d7ed0
NC		 3116 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3117
3118 /* Fill in the blueprint of a PLT. */
0451c93c
MS		 3119 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3120 htab->splt->contents + h->plt.offset);
3121 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3122 htab->splt->contents + h->plt.offset + 4);
3123 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3124 htab->splt->contents + h->plt.offset + 8);
3125 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3126 htab->splt->contents + h->plt.offset + 12);
3127 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3128 htab->splt->contents + h->plt.offset + 16);
3129 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3130 htab->splt->contents + h->plt.offset + 20);
3131 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3132 htab->splt->contents + h->plt.offset + 24);
3133 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3134 htab->splt->contents + h->plt.offset + 28);
a85d7ed0
NC		 3135 /* Fixup the relative address to the GOT entry */
3136 bfd_put_32 (output_bfd,
0451c93c
MS		 3137 (htab->sgotplt->output_section->vma +
3138 htab->sgotplt->output_offset + got_offset
3139 - (htab->splt->output_section->vma + h->plt.offset))/2,
3140 htab->splt->contents + h->plt.offset + 2);
a85d7ed0
NC		 3141 /* Fixup the relative branch to PLT 0 */
3142 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3143 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
0451c93c 3144 htab->splt->contents + h->plt.offset + 24);
a85d7ed0
NC		 3145 /* Fixup offset into symbol table */
3146 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
0451c93c 3147 htab->splt->contents + h->plt.offset + 28);
a85d7ed0
NC		 3148
3149 /* Fill in the entry in the global offset table.
947216bf 3150 Points to instruction after GOT offset. */
a85d7ed0 3151 bfd_put_64 (output_bfd,
0451c93c
MS		 3152 (htab->splt->output_section->vma
3153 + htab->splt->output_offset
a85d7ed0
NC		 3154 + h->plt.offset
3155 + 14),
0451c93c 3156 htab->sgotplt->contents + got_offset);
a85d7ed0 3157
0451c93c
MS		 3158 /* Fill in the entry in the .rela.plt section. */
3159 rela.r_offset = (htab->sgotplt->output_section->vma
3160 + htab->sgotplt->output_offset
3161 + got_offset);
3162 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3163 rela.r_addend = 0;
947216bf 3164 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
0451c93c 3165 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3166
3167 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3168 {
3169 /* Mark the symbol as undefined, rather than as defined in
0451c93c
MS		 3170 the .plt section. Leave the value alone. This is a clue
3171 for the dynamic linker, to make function pointer
3172 comparisons work between an application and shared
3173 library. */
a85d7ed0
NC		 3174 sym->st_shndx = SHN_UNDEF;
3175 }
3176 }
3177
69fc87f1
MS		 3178 if (h->got.offset != (bfd_vma) -1
3179 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3180 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3181 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
a85d7ed0 3182 {
a85d7ed0 3183 Elf_Internal_Rela rela;
947216bf 3184 bfd_byte *loc;
a85d7ed0
NC		 3185
3186 /* This symbol has an entry in the global offset table. Set it
947216bf 3187 up. */
0451c93c
MS		 3188 if (htab->sgot == NULL || htab->srelgot == NULL)
3189 abort ();
a85d7ed0 3190
0451c93c
MS		 3191 rela.r_offset = (htab->sgot->output_section->vma
3192 + htab->sgot->output_offset
dc810e39 3193 + (h->got.offset &~ (bfd_vma) 1));
a85d7ed0
NC		 3194
3195 /* If this is a static link, or it is a -Bsymbolic link and the
3196 symbol is defined locally or was forced to be local because
3197 of a version file, we just want to emit a RELATIVE reloc.
3198 The entry in the global offset table will already have been
3199 initialized in the relocate_section function. */
0451c93c
MS		 3200 if (info->shared
3201 && (info->symbolic
3202 || h->dynindx == -1
3203 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
3204 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
947216bf 3205 {
0451c93c 3206 BFD_ASSERT((h->got.offset & 1) != 0);
947216bf
AM		 3207 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3208 rela.r_addend = (h->root.u.def.value
3209 + h->root.u.def.section->output_section->vma
3210 + h->root.u.def.section->output_offset);
3211 }
a85d7ed0
NC		 3212 else
3213 {
3214 BFD_ASSERT((h->got.offset & 1) == 0);
0451c93c 3215 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
a85d7ed0 3216 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
947216bf
AM		 3217 rela.r_addend = 0;
3218 }
a85d7ed0 3219
947216bf
AM		 3220 loc = htab->srelgot->contents;
3221 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3222 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3223 }
3224
3225 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3226 {
a85d7ed0 3227 Elf_Internal_Rela rela;
947216bf 3228 bfd_byte *loc;
a85d7ed0
NC		 3229
3230 /* This symbols needs a copy reloc. Set it up. */
3231
0451c93c
MS		 3232 if (h->dynindx == -1
3233 || (h->root.type != bfd_link_hash_defined
3234 && h->root.type != bfd_link_hash_defweak)
3235 || htab->srelbss == NULL)
3236 abort ();
a85d7ed0
NC		 3237
3238 rela.r_offset = (h->root.u.def.value
3239 + h->root.u.def.section->output_section->vma
3240 + h->root.u.def.section->output_offset);
3241 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3242 rela.r_addend = 0;
947216bf
AM		 3243 loc = htab->srelbss->contents;
3244 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3245 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3246 }
3247
3248 /* Mark some specially defined symbols as absolute. */
3249 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3250 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3251 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3252 sym->st_shndx = SHN_ABS;
3253
b34976b6 3254 return TRUE;
a85d7ed0
NC		 3255}
3256
0451c93c
MS		 3257/* Used to decide how to sort relocs in an optimal manner for the
3258 dynamic linker, before writing them out. */
3259
3260static enum elf_reloc_type_class
3261elf_s390_reloc_type_class (rela)
3262 const Elf_Internal_Rela *rela;
3263{
3264 switch ((int) ELF64_R_TYPE (rela->r_info))
3265 {
3266 case R_390_RELATIVE:
3267 return reloc_class_relative;
3268 case R_390_JMP_SLOT:
3269 return reloc_class_plt;
3270 case R_390_COPY:
3271 return reloc_class_copy;
3272 default:
3273 return reloc_class_normal;
3274 }
3275}
3276
a85d7ed0
NC		 3277/* Finish up the dynamic sections. */
3278
b34976b6 3279static bfd_boolean
a85d7ed0
NC		 3280elf_s390_finish_dynamic_sections (output_bfd, info)
3281 bfd *output_bfd;
3282 struct bfd_link_info *info;
3283{
0451c93c 3284 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 3285 bfd *dynobj;
3286 asection *sdyn;
a85d7ed0 3287
0451c93c
MS		 3288 htab = elf_s390_hash_table (info);
3289 dynobj = htab->elf.dynobj;
a85d7ed0
NC		 3290 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3291
0451c93c 3292 if (htab->elf.dynamic_sections_created)
a85d7ed0 3293 {
a85d7ed0
NC		 3294 Elf64_External_Dyn *dyncon, *dynconend;
3295
0451c93c
MS		 3296 if (sdyn == NULL || htab->sgot == NULL)
3297 abort ();
a85d7ed0
NC		 3298
3299 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3300 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3301 for (; dyncon < dynconend; dyncon++)
3302 {
3303 Elf_Internal_Dyn dyn;
a85d7ed0 3304 asection *s;
ec338859 3305
a85d7ed0 3306 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
ec338859 3307
a85d7ed0
NC		 3308 switch (dyn.d_tag)
3309 {
3310 default:
0451c93c 3311 continue;
ec338859 3312
a85d7ed0 3313 case DT_PLTGOT:
0451c93c
MS		 3314 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3315 break;
ec338859 3316
a85d7ed0 3317 case DT_JMPREL:
0451c93c 3318 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
a85d7ed0 3319 break;
ec338859 3320
a85d7ed0 3321 case DT_PLTRELSZ:
0451c93c 3322 s = htab->srelplt->output_section;
a85d7ed0
NC		 3323 if (s->_cooked_size != 0)
3324 dyn.d_un.d_val = s->_cooked_size;
3325 else
3326 dyn.d_un.d_val = s->_raw_size;
a85d7ed0 3327 break;
ec338859 3328
a85d7ed0
NC		 3329 case DT_RELASZ:
3330 /* The procedure linkage table relocs (DT_JMPREL) should
3331 not be included in the overall relocs (DT_RELA).
3332 Therefore, we override the DT_RELASZ entry here to
3333 make it not include the JMPREL relocs. Since the
3334 linker script arranges for .rela.plt to follow all
3335 other relocation sections, we don't have to worry
3336 about changing the DT_RELA entry. */
0451c93c
MS		 3337 s = htab->srelplt->output_section;
3338 if (s->_cooked_size != 0)
3339 dyn.d_un.d_val -= s->_cooked_size;
3340 else
3341 dyn.d_un.d_val -= s->_raw_size;
a85d7ed0
NC		 3342 break;
3343 }
0451c93c
MS		 3344
3345 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
a85d7ed0
NC		 3346 }
3347
3348 /* Fill in the special first entry in the procedure linkage table. */
0451c93c 3349 if (htab->splt && htab->splt->_raw_size > 0)
a85d7ed0
NC		 3350 {
3351 /* fill in blueprint for plt 0 entry */
0451c93c
MS		 3352 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3353 htab->splt->contents );
3354 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3355 htab->splt->contents +4 );
3356 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3357 htab->splt->contents +12 );
3358 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3359 htab->splt->contents +16 );
3360 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3361 htab->splt->contents +20 );
3362 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3363 htab->splt->contents + 24);
3364 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3365 htab->splt->contents + 28 );
a85d7ed0
NC		 3366 /* Fixup relative address to start of GOT */
3367 bfd_put_32 (output_bfd,
0451c93c
MS		 3368 (htab->sgotplt->output_section->vma +
3369 htab->sgotplt->output_offset
3370 - htab->splt->output_section->vma - 6)/2,
3371 htab->splt->contents + 8);
a85d7ed0 3372 }
0451c93c
MS		 3373 elf_section_data (htab->splt->output_section)
3374 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
a85d7ed0
NC		 3375 }
3376
0451c93c 3377 if (htab->sgotplt)
a85d7ed0 3378 {
0451c93c
MS		 3379 /* Fill in the first three entries in the global offset table. */
3380 if (htab->sgotplt->_raw_size > 0)
3381 {
3382 bfd_put_64 (output_bfd,
3383 (sdyn == NULL ? (bfd_vma) 0
3384 : sdyn->output_section->vma + sdyn->output_offset),
3385 htab->sgotplt->contents);
3386 /* One entry for shared object struct ptr. */
3387 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3388 /* One entry for _dl_runtime_resolve. */
3389 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3390 }
a85d7ed0 3391
0451c93c
MS		 3392 elf_section_data (htab->sgot->output_section)
3393 ->this_hdr.sh_entsize = 8;
3394 }
b34976b6 3395 return TRUE;
a85d7ed0
NC		 3396}
3397
ae9a127f
NC		 3398/* Why was the hash table entry size definition changed from
3399 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3400 this is the only reason for the s390_elf64_size_info structure. */
a85d7ed0
NC		 3401
3402const struct elf_size_info s390_elf64_size_info =
3403{
3404 sizeof (Elf64_External_Ehdr),
3405 sizeof (Elf64_External_Phdr),
3406 sizeof (Elf64_External_Shdr),
3407 sizeof (Elf64_External_Rel),
3408 sizeof (Elf64_External_Rela),
3409 sizeof (Elf64_External_Sym),
3410 sizeof (Elf64_External_Dyn),
3411 sizeof (Elf_External_Note),
ae9a127f
NC		 3412 8, /* hash-table entry size. */
3413 1, /* internal relocations per external relocations. */
3414 64, /* arch_size. */
45d6a902 3415 3, /* log_file_align. */
a85d7ed0
NC		 3416 ELFCLASS64, EV_CURRENT,
3417 bfd_elf64_write_out_phdrs,
3418 bfd_elf64_write_shdrs_and_ehdr,
3419 bfd_elf64_write_relocs,
73ff0d56 3420 bfd_elf64_swap_symbol_in,
a85d7ed0
NC		 3421 bfd_elf64_swap_symbol_out,
3422 bfd_elf64_slurp_reloc_table,
3423 bfd_elf64_slurp_symbol_table,
3424 bfd_elf64_swap_dyn_in,
3425 bfd_elf64_swap_dyn_out,
947216bf
AM		 3426 bfd_elf64_swap_reloc_in,
3427 bfd_elf64_swap_reloc_out,
3428 bfd_elf64_swap_reloca_in,
3429 bfd_elf64_swap_reloca_out
a85d7ed0
NC		 3430};
3431
3432#define TARGET_BIG_SYM bfd_elf64_s390_vec
3433#define TARGET_BIG_NAME "elf64-s390"
3434#define ELF_ARCH bfd_arch_s390
3435#define ELF_MACHINE_CODE EM_S390
3436#define ELF_MACHINE_ALT1 EM_S390_OLD
3437#define ELF_MAXPAGESIZE 0x1000
3438
3439#define elf_backend_size_info s390_elf64_size_info
3440
3441#define elf_backend_can_gc_sections 1
51b64d56 3442#define elf_backend_can_refcount 1
a85d7ed0
NC		 3443#define elf_backend_want_got_plt 1
3444#define elf_backend_plt_readonly 1
3445#define elf_backend_want_plt_sym 0
3446#define elf_backend_got_header_size 24
3447#define elf_backend_plt_header_size PLT_ENTRY_SIZE
b491616a 3448#define elf_backend_rela_normal 1
a85d7ed0
NC		 3449
3450#define elf_info_to_howto elf_s390_info_to_howto
3451
a85d7ed0
NC		 3452#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3453#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3454#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3455
3456#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3457#define elf_backend_check_relocs elf_s390_check_relocs
0451c93c
MS		 3458#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3459#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
a85d7ed0
NC		 3460#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3461#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3462#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3463#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
0451c93c 3464#define elf_backend_reloc_type_class elf_s390_reloc_type_class
a85d7ed0
NC		 3465#define elf_backend_relocate_section elf_s390_relocate_section
3466#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
29c2fb7c 3467#define elf_backend_reloc_type_class elf_s390_reloc_type_class
a85d7ed0 3468
69fc87f1
MS		 3469#define bfd_elf64_mkobject elf_s390_mkobject
3470#define elf_backend_object_p elf_s390_object_p
a85d7ed0
NC		 3471
3472#include "elf64-target.h"
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