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* cache.c (cache_bread): Set bfd_error_file_truncated if EOF
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
CommitLineData
a85d7ed0 1/* IBM S/390-specific support for 64-bit ELF
ab96bf03 2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3eb128b2 3 Free Software Foundation, Inc.
a85d7ed0
NC		 4 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
cd123cb7 10 the Free Software Foundation; either version 3 of the License, or
a85d7ed0
NC		 11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
3e110533 20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
53e09e0a 21 02110-1301, USA. */
a85d7ed0 22
a85d7ed0 23#include "sysdep.h"
3db64b00 24#include "bfd.h"
a85d7ed0
NC		 25#include "bfdlink.h"
26#include "libbfd.h"
27#include "elf-bfd.h"
28
29static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
b34976b6 33static bfd_boolean elf_s390_is_local_label_name
0451c93c
MS		 34 PARAMS ((bfd *, const char *));
35static struct bfd_hash_entry *link_hash_newfunc
a85d7ed0
NC		 36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 PARAMS ((bfd *));
b34976b6 39static bfd_boolean create_got_section
0451c93c 40 PARAMS((bfd *, struct bfd_link_info *));
b34976b6 41static bfd_boolean elf_s390_create_dynamic_sections
0451c93c
MS		 42 PARAMS((bfd *, struct bfd_link_info *));
43static void elf_s390_copy_indirect_symbol
fcfa13d2 44 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
b48fa14c 45 struct elf_link_hash_entry *));
b34976b6 46static bfd_boolean elf_s390_check_relocs
a85d7ed0
NC		 47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
5236c819
MS		 49struct elf_s390_link_hash_entry;
50static void elf_s390_adjust_gotplt
51 PARAMS ((struct elf_s390_link_hash_entry *));
b34976b6 52static bfd_boolean elf_s390_adjust_dynamic_symbol
a85d7ed0 53 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
b34976b6 54static bfd_boolean allocate_dynrelocs
0451c93c 55 PARAMS ((struct elf_link_hash_entry *, PTR));
b34976b6 56static bfd_boolean readonly_dynrelocs
0451c93c 57 PARAMS ((struct elf_link_hash_entry *, PTR));
b34976b6 58static bfd_boolean elf_s390_size_dynamic_sections
a85d7ed0 59 PARAMS ((bfd *, struct bfd_link_info *));
b34976b6 60static bfd_boolean elf_s390_relocate_section
a85d7ed0
NC		 61 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
b34976b6 63static bfd_boolean elf_s390_finish_dynamic_symbol
a85d7ed0
NC		 64 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
65 Elf_Internal_Sym *));
0451c93c
MS		 66static enum elf_reloc_type_class elf_s390_reloc_type_class
67 PARAMS ((const Elf_Internal_Rela *));
b34976b6 68static bfd_boolean elf_s390_finish_dynamic_sections
a85d7ed0 69 PARAMS ((bfd *, struct bfd_link_info *));
5236c819
MS		 70static bfd_boolean elf_s390_object_p
71 PARAMS ((bfd *));
69fc87f1
MS		 72static int elf_s390_tls_transition
73 PARAMS ((struct bfd_link_info *, int, int));
74static bfd_reloc_status_type s390_tls_reloc
75 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
76static bfd_vma dtpoff_base
77 PARAMS ((struct bfd_link_info *));
78static bfd_vma tpoff
79 PARAMS ((struct bfd_link_info *, bfd_vma));
80static void invalid_tls_insn
81 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
bd1ea41b
MS		 82static bfd_reloc_status_type s390_elf_ldisp_reloc
83 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
a85d7ed0 84
a85d7ed0
NC		 85#include "elf/s390.h"
86
87/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
88 from smaller values. Start with zero, widen, *then* decrement. */
89#define MINUS_ONE (((bfd_vma)0) - 1)
90
91/* The relocation "howto" table. */
92static reloc_howto_type elf_howto_table[] =
93{
94 HOWTO (R_390_NONE, /* type */
95 0, /* rightshift */
96 0, /* size (0 = byte, 1 = short, 2 = long) */
97 0, /* bitsize */
b34976b6 98 FALSE, /* pc_relative */
a85d7ed0
NC		 99 0, /* bitpos */
100 complain_overflow_dont, /* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_390_NONE", /* name */
b34976b6 103 FALSE, /* partial_inplace */
a85d7ed0
NC		 104 0, /* src_mask */
105 0, /* dst_mask */
b34976b6
AM		 106 FALSE), /* pcrel_offset */
107
5236c819
MS		 108 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
110 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
111 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
112 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
114 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
116 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
15f8604d 118 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
5236c819
MS		 119 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
120 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
122 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
124 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
126 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
128 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
130 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
132 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
134 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
136 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
138 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
140 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
142 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
144 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
146 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
148 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
150 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
152 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
154 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
156 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
158 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
160 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
162 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
164 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
165 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
166 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
168 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
170 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
172 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
174 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
176 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
178 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
69fc87f1
MS		 180 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
181 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
182 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
183 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
184 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
185 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
186 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
187 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
188 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
189 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
190 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
191 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
192 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
193 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
194 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
195 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
196 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
197 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
198 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
199 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
200 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
202 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
203 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
204 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
205 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
206 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
207 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
208 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
210 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
212 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
213 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
bd1ea41b
MS		 214 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
215 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
216 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
217 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
218 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
219 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
220 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
221 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
a85d7ed0
NC		 222};
223
224/* GNU extension to record C++ vtable hierarchy. */
225static reloc_howto_type elf64_s390_vtinherit_howto =
b34976b6 226 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
a85d7ed0 227static reloc_howto_type elf64_s390_vtentry_howto =
b34976b6 228 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		 229
230static reloc_howto_type *
231elf_s390_reloc_type_lookup (abfd, code)
232 bfd *abfd ATTRIBUTE_UNUSED;
233 bfd_reloc_code_real_type code;
234{
0451c93c
MS		 235 switch (code)
236 {
237 case BFD_RELOC_NONE:
238 return &elf_howto_table[(int) R_390_NONE];
239 case BFD_RELOC_8:
240 return &elf_howto_table[(int) R_390_8];
241 case BFD_RELOC_390_12:
242 return &elf_howto_table[(int) R_390_12];
243 case BFD_RELOC_16:
244 return &elf_howto_table[(int) R_390_16];
245 case BFD_RELOC_32:
246 return &elf_howto_table[(int) R_390_32];
247 case BFD_RELOC_CTOR:
248 return &elf_howto_table[(int) R_390_32];
249 case BFD_RELOC_32_PCREL:
250 return &elf_howto_table[(int) R_390_PC32];
251 case BFD_RELOC_390_GOT12:
252 return &elf_howto_table[(int) R_390_GOT12];
253 case BFD_RELOC_32_GOT_PCREL:
254 return &elf_howto_table[(int) R_390_GOT32];
255 case BFD_RELOC_390_PLT32:
256 return &elf_howto_table[(int) R_390_PLT32];
257 case BFD_RELOC_390_COPY:
258 return &elf_howto_table[(int) R_390_COPY];
259 case BFD_RELOC_390_GLOB_DAT:
260 return &elf_howto_table[(int) R_390_GLOB_DAT];
261 case BFD_RELOC_390_JMP_SLOT:
262 return &elf_howto_table[(int) R_390_JMP_SLOT];
263 case BFD_RELOC_390_RELATIVE:
264 return &elf_howto_table[(int) R_390_RELATIVE];
265 case BFD_RELOC_32_GOTOFF:
5236c819 266 return &elf_howto_table[(int) R_390_GOTOFF32];
0451c93c
MS		 267 case BFD_RELOC_390_GOTPC:
268 return &elf_howto_table[(int) R_390_GOTPC];
269 case BFD_RELOC_390_GOT16:
270 return &elf_howto_table[(int) R_390_GOT16];
271 case BFD_RELOC_16_PCREL:
272 return &elf_howto_table[(int) R_390_PC16];
273 case BFD_RELOC_390_PC16DBL:
274 return &elf_howto_table[(int) R_390_PC16DBL];
275 case BFD_RELOC_390_PLT16DBL:
276 return &elf_howto_table[(int) R_390_PLT16DBL];
0451c93c
MS		 277 case BFD_RELOC_390_PC32DBL:
278 return &elf_howto_table[(int) R_390_PC32DBL];
279 case BFD_RELOC_390_PLT32DBL:
280 return &elf_howto_table[(int) R_390_PLT32DBL];
281 case BFD_RELOC_390_GOTPCDBL:
282 return &elf_howto_table[(int) R_390_GOTPCDBL];
283 case BFD_RELOC_64:
284 return &elf_howto_table[(int) R_390_64];
285 case BFD_RELOC_64_PCREL:
286 return &elf_howto_table[(int) R_390_PC64];
287 case BFD_RELOC_390_GOT64:
288 return &elf_howto_table[(int) R_390_GOT64];
289 case BFD_RELOC_390_PLT64:
290 return &elf_howto_table[(int) R_390_PLT64];
291 case BFD_RELOC_390_GOTENT:
292 return &elf_howto_table[(int) R_390_GOTENT];
5236c819
MS		 293 case BFD_RELOC_16_GOTOFF:
294 return &elf_howto_table[(int) R_390_GOTOFF16];
295 case BFD_RELOC_390_GOTOFF64:
296 return &elf_howto_table[(int) R_390_GOTOFF64];
297 case BFD_RELOC_390_GOTPLT12:
298 return &elf_howto_table[(int) R_390_GOTPLT12];
299 case BFD_RELOC_390_GOTPLT16:
300 return &elf_howto_table[(int) R_390_GOTPLT16];
301 case BFD_RELOC_390_GOTPLT32:
302 return &elf_howto_table[(int) R_390_GOTPLT32];
303 case BFD_RELOC_390_GOTPLT64:
304 return &elf_howto_table[(int) R_390_GOTPLT64];
305 case BFD_RELOC_390_GOTPLTENT:
306 return &elf_howto_table[(int) R_390_GOTPLTENT];
307 case BFD_RELOC_390_PLTOFF16:
308 return &elf_howto_table[(int) R_390_PLTOFF16];
309 case BFD_RELOC_390_PLTOFF32:
310 return &elf_howto_table[(int) R_390_PLTOFF32];
311 case BFD_RELOC_390_PLTOFF64:
312 return &elf_howto_table[(int) R_390_PLTOFF64];
69fc87f1
MS		 313 case BFD_RELOC_390_TLS_LOAD:
314 return &elf_howto_table[(int) R_390_TLS_LOAD];
315 case BFD_RELOC_390_TLS_GDCALL:
316 return &elf_howto_table[(int) R_390_TLS_GDCALL];
317 case BFD_RELOC_390_TLS_LDCALL:
318 return &elf_howto_table[(int) R_390_TLS_LDCALL];
319 case BFD_RELOC_390_TLS_GD64:
320 return &elf_howto_table[(int) R_390_TLS_GD64];
321 case BFD_RELOC_390_TLS_GOTIE12:
322 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
323 case BFD_RELOC_390_TLS_GOTIE64:
324 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
325 case BFD_RELOC_390_TLS_LDM64:
326 return &elf_howto_table[(int) R_390_TLS_LDM64];
327 case BFD_RELOC_390_TLS_IE64:
328 return &elf_howto_table[(int) R_390_TLS_IE64];
329 case BFD_RELOC_390_TLS_IEENT:
330 return &elf_howto_table[(int) R_390_TLS_IEENT];
331 case BFD_RELOC_390_TLS_LE64:
332 return &elf_howto_table[(int) R_390_TLS_LE64];
333 case BFD_RELOC_390_TLS_LDO64:
334 return &elf_howto_table[(int) R_390_TLS_LDO64];
335 case BFD_RELOC_390_TLS_DTPMOD:
336 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
337 case BFD_RELOC_390_TLS_DTPOFF:
338 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
339 case BFD_RELOC_390_TLS_TPOFF:
340 return &elf_howto_table[(int) R_390_TLS_TPOFF];
bd1ea41b
MS		 341 case BFD_RELOC_390_20:
342 return &elf_howto_table[(int) R_390_20];
343 case BFD_RELOC_390_GOT20:
344 return &elf_howto_table[(int) R_390_GOT20];
345 case BFD_RELOC_390_GOTPLT20:
346 return &elf_howto_table[(int) R_390_GOTPLT20];
347 case BFD_RELOC_390_TLS_GOTIE20:
348 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
5236c819
MS		 349 case BFD_RELOC_VTABLE_INHERIT:
350 return &elf64_s390_vtinherit_howto;
351 case BFD_RELOC_VTABLE_ENTRY:
352 return &elf64_s390_vtentry_howto;
0451c93c
MS		 353 default:
354 break;
355 }
a85d7ed0
NC		 356 return 0;
357}
358
157090f7
AM		 359static reloc_howto_type *
360elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
361 const char *r_name)
362{
363 unsigned int i;
364
365 for (i = 0;
366 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
367 i++)
368 if (elf_howto_table[i].name != NULL
369 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
370 return &elf_howto_table[i];
371
372 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
373 return &elf64_s390_vtinherit_howto;
374 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
375 return &elf64_s390_vtentry_howto;
376
377 return NULL;
378}
379
a85d7ed0
NC		 380/* We need to use ELF64_R_TYPE so we have our own copy of this function,
381 and elf64-s390.c has its own copy. */
382
383static void
384elf_s390_info_to_howto (abfd, cache_ptr, dst)
385 bfd *abfd ATTRIBUTE_UNUSED;
386 arelent *cache_ptr;
387 Elf_Internal_Rela *dst;
388{
d0fb9a8d
JJ		 389 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
390 switch (r_type)
a85d7ed0
NC		 391 {
392 case R_390_GNU_VTINHERIT:
393 cache_ptr->howto = &elf64_s390_vtinherit_howto;
394 break;
395
396 case R_390_GNU_VTENTRY:
397 cache_ptr->howto = &elf64_s390_vtentry_howto;
398 break;
399
400 default:
d0fb9a8d
JJ		 401 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
402 {
403 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
404 abfd, (int) r_type);
405 r_type = R_390_NONE;
406 }
407 cache_ptr->howto = &elf_howto_table[r_type];
99c79b2e 408 }
a85d7ed0
NC		 409}
410
69fc87f1
MS		 411/* A relocation function which doesn't do anything. */
412static bfd_reloc_status_type
413s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
26e41594 414 output_bfd, error_message)
69fc87f1
MS		 415 bfd *abfd ATTRIBUTE_UNUSED;
416 arelent *reloc_entry;
417 asymbol *symbol ATTRIBUTE_UNUSED;
418 PTR data ATTRIBUTE_UNUSED;
419 asection *input_section;
420 bfd *output_bfd;
421 char **error_message ATTRIBUTE_UNUSED;
422{
423 if (output_bfd)
424 reloc_entry->address += input_section->output_offset;
425 return bfd_reloc_ok;
426}
427
bd1ea41b
MS		 428/* Handle the large displacement relocs. */
429static bfd_reloc_status_type
430s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
431 output_bfd, error_message)
432 bfd *abfd;
433 arelent *reloc_entry;
434 asymbol *symbol;
435 PTR data;
436 asection *input_section;
437 bfd *output_bfd;
438 char **error_message ATTRIBUTE_UNUSED;
439{
440 reloc_howto_type *howto = reloc_entry->howto;
441 bfd_vma relocation;
442 bfd_vma insn;
443
444 if (output_bfd != (bfd *) NULL
445 && (symbol->flags & BSF_SECTION_SYM) == 0
446 && (! howto->partial_inplace
447 || reloc_entry->addend == 0))
448 {
449 reloc_entry->address += input_section->output_offset;
450 return bfd_reloc_ok;
451 }
452 if (output_bfd != NULL)
453 return bfd_reloc_continue;
454
07515404 455 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
bd1ea41b
MS		 456 return bfd_reloc_outofrange;
457
458 relocation = (symbol->value
459 + symbol->section->output_section->vma
460 + symbol->section->output_offset);
461 relocation += reloc_entry->addend;
462 if (howto->pc_relative)
463 {
464 relocation -= (input_section->output_section->vma
465 + input_section->output_offset);
466 relocation -= reloc_entry->address;
467 }
468
469 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
470 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
471 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
472
473 if ((bfd_signed_vma) relocation < - 0x80000
474 || (bfd_signed_vma) relocation > 0x7ffff)
475 return bfd_reloc_overflow;
476 else
477 return bfd_reloc_ok;
478}
479
b34976b6 480static bfd_boolean
a85d7ed0
NC		 481elf_s390_is_local_label_name (abfd, name)
482 bfd *abfd;
483 const char *name;
484{
485 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
b34976b6 486 return TRUE;
a85d7ed0
NC		 487
488 return _bfd_elf_is_local_label_name (abfd, name);
489}
490
491/* Functions for the 390 ELF linker. */
492
493/* The name of the dynamic interpreter. This is put in the .interp
494 section. */
495
496#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
497
64285810
MS		 498/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
499 copying dynamic variables from a shared lib into an app's dynbss
500 section, and instead use a dynamic relocation to point into the
501 shared lib. */
502#define ELIMINATE_COPY_RELOCS 1
503
a85d7ed0
NC		 504/* The size in bytes of the first entry in the procedure linkage table. */
505#define PLT_FIRST_ENTRY_SIZE 32
506/* The size in bytes of an entry in the procedure linkage table. */
99c79b2e 507#define PLT_ENTRY_SIZE 32
a85d7ed0
NC		 508
509#define GOT_ENTRY_SIZE 8
510
511/* The first three entries in a procedure linkage table are reserved,
512 and the initial contents are unimportant (we zero them out).
513 Subsequent entries look like this. See the SVR4 ABI 386
514 supplement to see how this works. */
515
516/* For the s390, simple addr offset can only be 0 - 4096.
517 To use the full 16777216 TB address space, several instructions
518 are needed to load an address in a register and execute
519 a branch( or just saving the address)
520
99c79b2e 521 Furthermore, only r 0 and 1 are free to use!!! */
a85d7ed0
NC		 522
523/* The first 3 words in the GOT are then reserved.
524 Word 0 is the address of the dynamic table.
525 Word 1 is a pointer to a structure describing the object
526 Word 2 is used to point to the loader entry address.
527
528 The code for PLT entries looks like this:
529
530 The GOT holds the address in the PLT to be executed.
531 The loader then gets:
532 24(15) = Pointer to the structure describing the object.
99c79b2e 533 28(15) = Offset in symbol table
a85d7ed0
NC		 534 The loader must then find the module where the function is
535 and insert the address in the GOT.
536
537 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
538 LG 1,0(1) # 6 bytes Load address from GOT in r1
539 BCR 15,1 # 2 bytes Jump to address
540 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
541 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
542 BRCL 15,-x # 6 bytes Jump to start of PLT
543 .long ? # 4 bytes offset into symbol table
544
545 Total = 32 bytes per PLT entry
546 Fixup at offset 2: relative address to GOT entry
547 Fixup at offset 22: relative branch to PLT0
548 Fixup at offset 28: 32 bit offset into symbol table
549
550 A 32 bit offset into the symbol table is enough. It allows for symbol
551 tables up to a size of 2 gigabyte. A single dynamic object (the main
552 program, any shared library) is limited to 4GB in size and I want to see
553 the program that manages to have a symbol table of more than 2 GB with a
554 total size of at max 4 GB. */
555
dc810e39
AM		 556#define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
557#define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
558#define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
559#define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
560#define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
561#define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
562#define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
563#define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
a85d7ed0
NC		 564
565/* The first PLT entry pushes the offset into the symbol table
566 from R1 onto the stack at 8(15) and the loader object info
567 at 12(15), loads the loader address in R1 and jumps to it. */
568
569/* The first entry in the PLT:
570
571 PLT0:
572 STG 1,56(15) # r1 contains the offset into the symbol table
573 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
574 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
575 LG 1,16(1) # get entry address of loader
576 BCR 15,1 # jump to loader
577
578 Fixup at offset 8: relative address to start of GOT. */
579
dc810e39
AM		 580#define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
581#define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
582#define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
583#define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
584#define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
585#define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
586#define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
587#define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
a85d7ed0
NC		 588
589/* The s390 linker needs to keep track of the number of relocs that it
0451c93c
MS		 590 decides to copy as dynamic relocs in check_relocs for each symbol.
591 This is so that it can later discard them if they are found to be
592 unnecessary. We store the information in a field extending the
593 regular ELF linker hash table. */
a85d7ed0 594
0451c93c 595struct elf_s390_dyn_relocs
a85d7ed0 596{
0451c93c
MS		 597 struct elf_s390_dyn_relocs *next;
598
599 /* The input section of the reloc. */
600 asection *sec;
601
602 /* Total number of relocs copied for the input section. */
a85d7ed0 603 bfd_size_type count;
0451c93c
MS		 604
605 /* Number of pc-relative relocs copied for the input section. */
606 bfd_size_type pc_count;
a85d7ed0
NC		 607};
608
609/* s390 ELF linker hash entry. */
610
611struct elf_s390_link_hash_entry
612{
0451c93c 613 struct elf_link_hash_entry elf;
a85d7ed0 614
0451c93c
MS		 615 /* Track dynamic relocs copied for this symbol. */
616 struct elf_s390_dyn_relocs *dyn_relocs;
5236c819
MS		 617
618 /* Number of GOTPLT references for a function. */
619 bfd_signed_vma gotplt_refcount;
69fc87f1
MS		 620
621#define GOT_UNKNOWN 0
622#define GOT_NORMAL 1
623#define GOT_TLS_GD 2
624#define GOT_TLS_IE 3
625#define GOT_TLS_IE_NLT 3
626 unsigned char tls_type;
a85d7ed0
NC		 627};
628
69fc87f1
MS		 629#define elf_s390_hash_entry(ent) \
630 ((struct elf_s390_link_hash_entry *)(ent))
631
632struct elf_s390_obj_tdata
633{
634 struct elf_obj_tdata root;
635
636 /* tls_type for each local got entry. */
637 char *local_got_tls_type;
638};
639
640#define elf_s390_tdata(abfd) \
641 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
642
643#define elf_s390_local_got_tls_type(abfd) \
644 (elf_s390_tdata (abfd)->local_got_tls_type)
645
646static bfd_boolean
62d7a5f6 647elf_s390_mkobject (bfd *abfd)
69fc87f1 648{
69fc87f1 649 if (abfd->tdata.any == NULL)
62d7a5f6
AM		 650 {
651 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
652 abfd->tdata.any = bfd_zalloc (abfd, amt);
653 if (abfd->tdata.any == NULL)
654 return FALSE;
655 }
656 return bfd_elf_mkobject (abfd);
69fc87f1
MS		 657}
658
659static bfd_boolean
660elf_s390_object_p (abfd)
661 bfd *abfd;
662{
69fc87f1
MS		 663 /* Set the right machine number for an s390 elf32 file. */
664 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
665}
666
a85d7ed0
NC		 667/* s390 ELF linker hash table. */
668
669struct elf_s390_link_hash_table
670{
0451c93c 671 struct elf_link_hash_table elf;
a85d7ed0 672
0451c93c
MS		 673 /* Short-cuts to get to dynamic linker sections. */
674 asection *sgot;
675 asection *sgotplt;
676 asection *srelgot;
677 asection *splt;
678 asection *srelplt;
679 asection *sdynbss;
680 asection *srelbss;
ec338859 681
69fc87f1
MS		 682 union {
683 bfd_signed_vma refcount;
684 bfd_vma offset;
685 } tls_ldm_got;
686
ec338859
AM		 687 /* Small local sym to section mapping cache. */
688 struct sym_sec_cache sym_sec;
0451c93c 689};
a85d7ed0
NC		 690
691/* Get the s390 ELF linker hash table from a link_info structure. */
692
693#define elf_s390_hash_table(p) \
694 ((struct elf_s390_link_hash_table *) ((p)->hash))
695
696/* Create an entry in an s390 ELF linker hash table. */
697
698static struct bfd_hash_entry *
0451c93c 699link_hash_newfunc (entry, table, string)
a85d7ed0
NC		 700 struct bfd_hash_entry *entry;
701 struct bfd_hash_table *table;
702 const char *string;
703{
a85d7ed0
NC		 704 /* Allocate the structure if it has not already been allocated by a
705 subclass. */
0451c93c
MS		 706 if (entry == NULL)
707 {
708 entry = bfd_hash_allocate (table,
709 sizeof (struct elf_s390_link_hash_entry));
710 if (entry == NULL)
711 return entry;
712 }
a85d7ed0
NC		 713
714 /* Call the allocation method of the superclass. */
0451c93c
MS		 715 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
716 if (entry != NULL)
a85d7ed0 717 {
0451c93c
MS		 718 struct elf_s390_link_hash_entry *eh;
719
720 eh = (struct elf_s390_link_hash_entry *) entry;
721 eh->dyn_relocs = NULL;
5236c819 722 eh->gotplt_refcount = 0;
69fc87f1 723 eh->tls_type = GOT_UNKNOWN;
a85d7ed0
NC		 724 }
725
0451c93c 726 return entry;
a85d7ed0
NC		 727}
728
729/* Create an s390 ELF linker hash table. */
730
731static struct bfd_link_hash_table *
732elf_s390_link_hash_table_create (abfd)
733 bfd *abfd;
734{
735 struct elf_s390_link_hash_table *ret;
dc810e39 736 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
a85d7ed0 737
e2d34d7d 738 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
0451c93c 739 if (ret == NULL)
a85d7ed0
NC		 740 return NULL;
741
66eb6687
AM		 742 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
743 sizeof (struct elf_s390_link_hash_entry)))
a85d7ed0 744 {
e2d34d7d 745 free (ret);
a85d7ed0
NC		 746 return NULL;
747 }
748
0451c93c
MS		 749 ret->sgot = NULL;
750 ret->sgotplt = NULL;
751 ret->srelgot = NULL;
752 ret->splt = NULL;
753 ret->srelplt = NULL;
754 ret->sdynbss = NULL;
755 ret->srelbss = NULL;
69fc87f1 756 ret->tls_ldm_got.refcount = 0;
ec338859 757 ret->sym_sec.abfd = NULL;
0451c93c
MS		 758
759 return &ret->elf.root;
760}
761
762/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
763 shortcuts to them in our hash table. */
764
b34976b6 765static bfd_boolean
0451c93c
MS		 766create_got_section (dynobj, info)
767 bfd *dynobj;
768 struct bfd_link_info *info;
769{
770 struct elf_s390_link_hash_table *htab;
771
772 if (! _bfd_elf_create_got_section (dynobj, info))
b34976b6 773 return FALSE;
0451c93c
MS		 774
775 htab = elf_s390_hash_table (info);
776 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
777 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
778 if (!htab->sgot || !htab->sgotplt)
779 abort ();
780
3496cb2a
L		 781 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
782 (SEC_ALLOC | SEC_LOAD
783 | SEC_HAS_CONTENTS
784 | SEC_IN_MEMORY
785 | SEC_LINKER_CREATED
786 | SEC_READONLY));
0451c93c 787 if (htab->srelgot == NULL
99881371 788 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
b34976b6
AM		 789 return FALSE;
790 return TRUE;
0451c93c
MS		 791}
792
793/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
794 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
795 hash table. */
796
b34976b6 797static bfd_boolean
0451c93c
MS		 798elf_s390_create_dynamic_sections (dynobj, info)
799 bfd *dynobj;
800 struct bfd_link_info *info;
801{
802 struct elf_s390_link_hash_table *htab;
803
804 htab = elf_s390_hash_table (info);
805 if (!htab->sgot && !create_got_section (dynobj, info))
b34976b6 806 return FALSE;
0451c93c
MS		 807
808 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 809 return FALSE;
0451c93c
MS		 810
811 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
812 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
813 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
814 if (!info->shared)
815 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
816
817 if (!htab->splt || !htab->srelplt || !htab->sdynbss
818 || (!info->shared && !htab->srelbss))
819 abort ();
820
b34976b6 821 return TRUE;
a85d7ed0
NC		 822}
823
0451c93c
MS		 824/* Copy the extra info we tack onto an elf_link_hash_entry. */
825
826static void
fcfa13d2
AM		 827elf_s390_copy_indirect_symbol (info, dir, ind)
828 struct bfd_link_info *info;
0451c93c
MS		 829 struct elf_link_hash_entry *dir, *ind;
830{
831 struct elf_s390_link_hash_entry *edir, *eind;
832
833 edir = (struct elf_s390_link_hash_entry *) dir;
834 eind = (struct elf_s390_link_hash_entry *) ind;
835
836 if (eind->dyn_relocs != NULL)
837 {
838 if (edir->dyn_relocs != NULL)
839 {
840 struct elf_s390_dyn_relocs **pp;
841 struct elf_s390_dyn_relocs *p;
842
fcfa13d2 843 /* Add reloc counts against the indirect sym to the direct sym
0451c93c
MS		 844 list. Merge any entries against the same section. */
845 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
846 {
847 struct elf_s390_dyn_relocs *q;
848
849 for (q = edir->dyn_relocs; q != NULL; q = q->next)
850 if (q->sec == p->sec)
851 {
852 q->pc_count += p->pc_count;
853 q->count += p->count;
854 *pp = p->next;
855 break;
856 }
857 if (q == NULL)
858 pp = &p->next;
859 }
860 *pp = edir->dyn_relocs;
861 }
862
863 edir->dyn_relocs = eind->dyn_relocs;
864 eind->dyn_relocs = NULL;
865 }
866
69fc87f1
MS		 867 if (ind->root.type == bfd_link_hash_indirect
868 && dir->got.refcount <= 0)
869 {
870 edir->tls_type = eind->tls_type;
871 eind->tls_type = GOT_UNKNOWN;
872 }
873
64285810
MS		 874 if (ELIMINATE_COPY_RELOCS
875 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 876 && dir->dynamic_adjusted)
877 {
878 /* If called to transfer flags for a weakdef during processing
879 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
880 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
881 dir->ref_dynamic |= ind->ref_dynamic;
882 dir->ref_regular |= ind->ref_regular;
883 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
884 dir->needs_plt |= ind->needs_plt;
885 }
64285810 886 else
fcfa13d2 887 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
0451c93c 888}
a85d7ed0 889
69fc87f1
MS		 890static int
891elf_s390_tls_transition (info, r_type, is_local)
892 struct bfd_link_info *info;
893 int r_type;
894 int is_local;
895{
896 if (info->shared)
897 return r_type;
898
899 switch (r_type)
900 {
901 case R_390_TLS_GD64:
902 case R_390_TLS_IE64:
903 if (is_local)
904 return R_390_TLS_LE64;
905 return R_390_TLS_IE64;
906 case R_390_TLS_GOTIE64:
907 if (is_local)
908 return R_390_TLS_LE64;
909 return R_390_TLS_GOTIE64;
910 case R_390_TLS_LDM64:
911 return R_390_TLS_LE64;
912 }
913
914 return r_type;
915}
916
a85d7ed0
NC		 917/* Look through the relocs for a section during the first phase, and
918 allocate space in the global offset table or procedure linkage
919 table. */
920
b34976b6 921static bfd_boolean
a85d7ed0
NC		 922elf_s390_check_relocs (abfd, info, sec, relocs)
923 bfd *abfd;
924 struct bfd_link_info *info;
925 asection *sec;
926 const Elf_Internal_Rela *relocs;
927{
0451c93c 928 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 929 Elf_Internal_Shdr *symtab_hdr;
930 struct elf_link_hash_entry **sym_hashes;
a85d7ed0
NC		 931 const Elf_Internal_Rela *rel;
932 const Elf_Internal_Rela *rel_end;
a85d7ed0 933 asection *sreloc;
5236c819 934 bfd_signed_vma *local_got_refcounts;
69fc87f1 935 int tls_type, old_tls_type;
a85d7ed0 936
1049f94e 937 if (info->relocatable)
b34976b6 938 return TRUE;
a85d7ed0 939
0451c93c 940 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 941 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
942 sym_hashes = elf_sym_hashes (abfd);
5236c819 943 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0 944
a85d7ed0
NC		 945 sreloc = NULL;
946
947 rel_end = relocs + sec->reloc_count;
948 for (rel = relocs; rel < rel_end; rel++)
949 {
69fc87f1 950 unsigned int r_type;
a85d7ed0
NC		 951 unsigned long r_symndx;
952 struct elf_link_hash_entry *h;
953
954 r_symndx = ELF64_R_SYM (rel->r_info);
955
0451c93c
MS		 956 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
957 {
d003868e
AM		 958 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
959 abfd,
0451c93c 960 r_symndx);
b34976b6 961 return FALSE;
0451c93c
MS		 962 }
963
a85d7ed0
NC		 964 if (r_symndx < symtab_hdr->sh_info)
965 h = NULL;
966 else
973a3492
L		 967 {
968 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
969 while (h->root.type == bfd_link_hash_indirect
970 || h->root.type == bfd_link_hash_warning)
971 h = (struct elf_link_hash_entry *) h->root.u.i.link;
972 }
a85d7ed0 973
5236c819
MS		 974 /* Create got section and local_got_refcounts array if they
975 are needed. */
69fc87f1
MS		 976 r_type = elf_s390_tls_transition (info,
977 ELF64_R_TYPE (rel->r_info),
978 h == NULL);
979 switch (r_type)
a85d7ed0
NC		 980 {
981 case R_390_GOT12:
947216bf 982 case R_390_GOT16:
bd1ea41b 983 case R_390_GOT20:
a85d7ed0
NC		 984 case R_390_GOT32:
985 case R_390_GOT64:
986 case R_390_GOTENT:
5236c819
MS		 987 case R_390_GOTPLT12:
988 case R_390_GOTPLT16:
bd1ea41b 989 case R_390_GOTPLT20:
5236c819
MS		 990 case R_390_GOTPLT32:
991 case R_390_GOTPLT64:
992 case R_390_GOTPLTENT:
69fc87f1
MS		 993 case R_390_TLS_GD64:
994 case R_390_TLS_GOTIE12:
bd1ea41b 995 case R_390_TLS_GOTIE20:
69fc87f1
MS		 996 case R_390_TLS_GOTIE64:
997 case R_390_TLS_IEENT:
998 case R_390_TLS_IE64:
999 case R_390_TLS_LDM64:
5236c819
MS		 1000 if (h == NULL
1001 && local_got_refcounts == NULL)
a85d7ed0 1002 {
5236c819 1003 bfd_size_type size;
0451c93c 1004
5236c819 1005 size = symtab_hdr->sh_info;
69fc87f1 1006 size *= (sizeof (bfd_signed_vma) + sizeof(char));
5236c819
MS		 1007 local_got_refcounts = ((bfd_signed_vma *)
1008 bfd_zalloc (abfd, size));
a85d7ed0 1009 if (local_got_refcounts == NULL)
5236c819
MS		 1010 return FALSE;
1011 elf_local_got_refcounts (abfd) = local_got_refcounts;
69fc87f1
MS		 1012 elf_s390_local_got_tls_type (abfd)
1013 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
a85d7ed0 1014 }
5236c819
MS		 1015 /* Fall through. */
1016 case R_390_GOTOFF16:
1017 case R_390_GOTOFF32:
1018 case R_390_GOTOFF64:
0451c93c
MS		 1019 case R_390_GOTPC:
1020 case R_390_GOTPCDBL:
1021 if (htab->sgot == NULL)
1022 {
1023 if (htab->elf.dynobj == NULL)
1024 htab->elf.dynobj = abfd;
1025 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 1026 return FALSE;
0451c93c 1027 }
5236c819
MS		 1028 }
1029
69fc87f1 1030 switch (r_type)
5236c819 1031 {
5236c819
MS		 1032 case R_390_GOTOFF16:
1033 case R_390_GOTOFF32:
1034 case R_390_GOTOFF64:
1035 case R_390_GOTPC:
1036 case R_390_GOTPCDBL:
1037 /* Got is created, nothing to be done. */
0451c93c 1038 break;
ec338859 1039
947216bf 1040 case R_390_PLT16DBL:
a85d7ed0
NC		 1041 case R_390_PLT32:
1042 case R_390_PLT32DBL:
1043 case R_390_PLT64:
5236c819
MS		 1044 case R_390_PLTOFF16:
1045 case R_390_PLTOFF32:
1046 case R_390_PLTOFF64:
a85d7ed0 1047 /* This symbol requires a procedure linkage table entry. We
947216bf
AM		 1048 actually build the entry in adjust_dynamic_symbol,
1049 because this might be a case of linking PIC code which is
1050 never referenced by a dynamic object, in which case we
1051 don't need to generate a procedure linkage table entry
1052 after all. */
ec338859 1053
a85d7ed0 1054 /* If this is a local symbol, we resolve it directly without
947216bf 1055 creating a procedure linkage table entry. */
5236c819
MS		 1056 if (h != NULL)
1057 {
f5385ebf 1058 h->needs_plt = 1;
5236c819
MS		 1059 h->plt.refcount += 1;
1060 }
1061 break;
ec338859 1062
5236c819
MS		 1063 case R_390_GOTPLT12:
1064 case R_390_GOTPLT16:
bd1ea41b 1065 case R_390_GOTPLT20:
5236c819
MS		 1066 case R_390_GOTPLT32:
1067 case R_390_GOTPLT64:
1068 case R_390_GOTPLTENT:
1069 /* This symbol requires either a procedure linkage table entry
1070 or an entry in the local got. We actually build the entry
1071 in adjust_dynamic_symbol because whether this is really a
1072 global reference can change and with it the fact if we have
1073 to create a plt entry or a local got entry. To be able to
1074 make a once global symbol a local one we have to keep track
1075 of the number of gotplt references that exist for this
1076 symbol. */
1077 if (h != NULL)
1078 {
1079 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
f5385ebf 1080 h->needs_plt = 1;
5236c819
MS		 1081 h->plt.refcount += 1;
1082 }
69fc87f1
MS		 1083 else
1084 local_got_refcounts[r_symndx] += 1;
1085 break;
1086
1087 case R_390_TLS_LDM64:
1088 htab->tls_ldm_got.refcount += 1;
1089 break;
1090
1091 case R_390_TLS_IE64:
1092 case R_390_TLS_GOTIE12:
bd1ea41b 1093 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1094 case R_390_TLS_GOTIE64:
1095 case R_390_TLS_IEENT:
1096 if (info->shared)
1097 info->flags |= DF_STATIC_TLS;
1098 /* Fall through */
1099
1100 case R_390_GOT12:
26e41594 1101 case R_390_GOT16:
bd1ea41b 1102 case R_390_GOT20:
69fc87f1
MS		 1103 case R_390_GOT32:
1104 case R_390_GOT64:
1105 case R_390_GOTENT:
1106 case R_390_TLS_GD64:
1107 /* This symbol requires a global offset table entry. */
1108 switch (r_type)
1109 {
1110 default:
1111 case R_390_GOT12:
1112 case R_390_GOT16:
bd1ea41b 1113 case R_390_GOT20:
69fc87f1
MS		 1114 case R_390_GOT32:
1115 case R_390_GOTENT:
1116 tls_type = GOT_NORMAL;
1117 break;
1118 case R_390_TLS_GD64:
1119 tls_type = GOT_TLS_GD;
1120 break;
1121 case R_390_TLS_IE64:
1122 case R_390_TLS_GOTIE64:
1123 tls_type = GOT_TLS_IE;
1124 break;
1125 case R_390_TLS_GOTIE12:
bd1ea41b 1126 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1127 case R_390_TLS_IEENT:
1128 tls_type = GOT_TLS_IE_NLT;
1129 break;
1130 }
1131
1132 if (h != NULL)
1133 {
1134 h->got.refcount += 1;
1135 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1136 }
5236c819
MS		 1137 else
1138 {
1139 local_got_refcounts[r_symndx] += 1;
69fc87f1 1140 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
5236c819 1141 }
69fc87f1
MS		 1142 /* If a TLS symbol is accessed using IE at least once,
1143 there is no point to use dynamic model for it. */
1144 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1145 {
1146 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1147 {
1148 (*_bfd_error_handler)
d003868e
AM		 1149 (_("%B: `%s' accessed both as normal and thread local symbol"),
1150 abfd, h->root.root.string);
69fc87f1
MS		 1151 return FALSE;
1152 }
1153 if (old_tls_type > tls_type)
1154 tls_type = old_tls_type;
1155 }
1156
1157 if (old_tls_type != tls_type)
1158 {
1159 if (h != NULL)
1160 elf_s390_hash_entry (h)->tls_type = tls_type;
1161 else
1162 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1163 }
1164
1165 if (r_type != R_390_TLS_IE64)
1166 break;
1167 /* Fall through */
1168
1169 case R_390_TLS_LE64:
1170 if (!info->shared)
1171 break;
1172 info->flags |= DF_STATIC_TLS;
1173 /* Fall through */
ec338859 1174
947216bf
AM		 1175 case R_390_8:
1176 case R_390_16:
a85d7ed0
NC		 1177 case R_390_32:
1178 case R_390_64:
947216bf
AM		 1179 case R_390_PC16:
1180 case R_390_PC16DBL:
a85d7ed0
NC		 1181 case R_390_PC32:
1182 case R_390_PC32DBL:
1183 case R_390_PC64:
0451c93c
MS		 1184 if (h != NULL && !info->shared)
1185 {
1186 /* If this reloc is in a read-only section, we might
1187 need a copy reloc. We can't check reliably at this
1188 stage whether the section is read-only, as input
1189 sections have not yet been mapped to output sections.
1190 Tentatively set the flag for now, and correct in
1191 adjust_dynamic_symbol. */
f5385ebf 1192 h->non_got_ref = 1;
ec338859 1193
0451c93c
MS		 1194 /* We may need a .plt entry if the function this reloc
1195 refers to is in a shared lib. */
1196 h->plt.refcount += 1;
1197 }
ec338859 1198
a85d7ed0 1199 /* If we are creating a shared library, and this is a reloc
0451c93c
MS		 1200 against a global symbol, or a non PC relative reloc
1201 against a local symbol, then we need to copy the reloc
1202 into the shared library. However, if we are linking with
1203 -Bsymbolic, we do not need to copy a reloc against a
1204 global symbol which is defined in an object we are
1205 including in the link (i.e., DEF_REGULAR is set). At
1206 this point we have not seen all the input files, so it is
1207 possible that DEF_REGULAR is not set now but will be set
1208 later (it is never cleared). In case of a weak definition,
1209 DEF_REGULAR may be cleared later by a strong definition in
1210 a shared library. We account for that possibility below by
1211 storing information in the relocs_copied field of the hash
1212 table entry. A similar situation occurs when creating
1213 shared libraries and symbol visibility changes render the
1214 symbol local.
1215
1216 If on the other hand, we are creating an executable, we
1217 may need to keep relocations for symbols satisfied by a
1218 dynamic library if we manage to avoid copy relocs for the
1219 symbol. */
1220 if ((info->shared
1221 && (sec->flags & SEC_ALLOC) != 0
1222 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1223 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1224 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1225 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1226 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1227 || (h != NULL
1228 && (! info->symbolic
1229 || h->root.type == bfd_link_hash_defweak
f5385ebf 1230 || !h->def_regular))))
64285810
MS		 1231 || (ELIMINATE_COPY_RELOCS
1232 && !info->shared
0451c93c
MS		 1233 && (sec->flags & SEC_ALLOC) != 0
1234 && h != NULL
1235 && (h->root.type == bfd_link_hash_defweak
f5385ebf 1236 || !h->def_regular)))
a85d7ed0 1237 {
ec338859
AM		 1238 struct elf_s390_dyn_relocs *p;
1239 struct elf_s390_dyn_relocs **head;
1240
0451c93c
MS		 1241 /* We must copy these reloc types into the output file.
1242 Create a reloc section in dynobj and make room for
1243 this reloc. */
a85d7ed0
NC		 1244 if (sreloc == NULL)
1245 {
1246 const char *name;
0451c93c 1247 bfd *dynobj;
ec338859 1248
a85d7ed0
NC		 1249 name = (bfd_elf_string_from_elf_section
1250 (abfd,
1251 elf_elfheader (abfd)->e_shstrndx,
1252 elf_section_data (sec)->rel_hdr.sh_name));
1253 if (name == NULL)
b34976b6 1254 return FALSE;
ec338859 1255
0112cd26 1256 if (! CONST_STRNEQ (name, ".rela")
0451c93c
MS		 1257 || strcmp (bfd_get_section_name (abfd, sec),
1258 name + 5) != 0)
1259 {
1260 (*_bfd_error_handler)
d003868e
AM		 1261 (_("%B: bad relocation section name `%s\'"),
1262 abfd, name);
0451c93c 1263 }
ec338859 1264
0451c93c
MS		 1265 if (htab->elf.dynobj == NULL)
1266 htab->elf.dynobj = abfd;
a85d7ed0 1267
0451c93c 1268 dynobj = htab->elf.dynobj;
a85d7ed0
NC		 1269 sreloc = bfd_get_section_by_name (dynobj, name);
1270 if (sreloc == NULL)
1271 {
1272 flagword flags;
ec338859 1273
a85d7ed0
NC		 1274 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1275 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1276 if ((sec->flags & SEC_ALLOC) != 0)
1277 flags |= SEC_ALLOC | SEC_LOAD;
3496cb2a
L		 1278 sreloc = bfd_make_section_with_flags (dynobj,
1279 name,
1280 flags);
a85d7ed0 1281 if (sreloc == NULL
99881371 1282 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
b34976b6 1283 return FALSE;
a85d7ed0 1284 }
0451c93c 1285 elf_section_data (sec)->sreloc = sreloc;
a85d7ed0 1286 }
ec338859 1287
0451c93c
MS		 1288 /* If this is a global symbol, we count the number of
1289 relocations we need for this symbol. */
1290 if (h != NULL)
a85d7ed0 1291 {
ec338859 1292 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
0451c93c
MS		 1293 }
1294 else
1295 {
ec338859
AM		 1296 /* Track dynamic relocs needed for local syms too.
1297 We really need local syms available to do this
1298 easily. Oh well. */
1299
1300 asection *s;
6edfbbad
DJ		 1301 void *vpp;
1302
ec338859
AM		 1303 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1304 sec, r_symndx);
1305 if (s == NULL)
b34976b6 1306 return FALSE;
ec338859 1307
6edfbbad
DJ		 1308 vpp = &elf_section_data (s)->local_dynrel;
1309 head = (struct elf_s390_dyn_relocs **) vpp;
ec338859
AM		 1310 }
1311
1312 p = *head;
1313 if (p == NULL || p->sec != sec)
1314 {
1315 bfd_size_type amt = sizeof *p;
1316 p = ((struct elf_s390_dyn_relocs *)
1317 bfd_alloc (htab->elf.dynobj, amt));
1318 if (p == NULL)
b34976b6 1319 return FALSE;
ec338859
AM		 1320 p->next = *head;
1321 *head = p;
1322 p->sec = sec;
1323 p->count = 0;
1324 p->pc_count = 0;
a85d7ed0 1325 }
ec338859
AM		 1326
1327 p->count += 1;
1328 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1329 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1330 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1331 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1332 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1333 p->pc_count += 1;
a85d7ed0 1334 }
a85d7ed0 1335 break;
ec338859 1336
a85d7ed0
NC		 1337 /* This relocation describes the C++ object vtable hierarchy.
1338 Reconstruct it for later use during GC. */
947216bf 1339 case R_390_GNU_VTINHERIT:
c152c796 1340 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 1341 return FALSE;
947216bf 1342 break;
ec338859 1343
a85d7ed0
NC		 1344 /* This relocation describes which C++ vtable entries are actually
1345 used. Record for later use during GC. */
947216bf 1346 case R_390_GNU_VTENTRY:
d17e0c6e
JB		 1347 BFD_ASSERT (h != NULL);
1348 if (h != NULL
1349 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 1350 return FALSE;
947216bf 1351 break;
ec338859 1352
a85d7ed0
NC		 1353 default:
1354 break;
1355 }
1356 }
1357
b34976b6 1358 return TRUE;
a85d7ed0
NC		 1359}
1360
1361/* Return the section that should be marked against GC for a given
1362 relocation. */
1363
1364static asection *
07adf181
AM		 1365elf_s390_gc_mark_hook (asection *sec,
1366 struct bfd_link_info *info,
1367 Elf_Internal_Rela *rel,
1368 struct elf_link_hash_entry *h,
1369 Elf_Internal_Sym *sym)
a85d7ed0
NC		 1370{
1371 if (h != NULL)
07adf181
AM		 1372 switch (ELF64_R_TYPE (rel->r_info))
1373 {
1374 case R_390_GNU_VTINHERIT:
1375 case R_390_GNU_VTENTRY:
1376 return NULL;
1377 }
1378
1379 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
a85d7ed0
NC		 1380}
1381
1382/* Update the got entry reference counts for the section being removed. */
1383
b34976b6 1384static bfd_boolean
07adf181
AM		 1385elf_s390_gc_sweep_hook (bfd *abfd,
1386 struct bfd_link_info *info,
1387 asection *sec,
1388 const Elf_Internal_Rela *relocs)
a85d7ed0
NC		 1389{
1390 Elf_Internal_Shdr *symtab_hdr;
1391 struct elf_link_hash_entry **sym_hashes;
1392 bfd_signed_vma *local_got_refcounts;
1393 const Elf_Internal_Rela *rel, *relend;
a85d7ed0 1394
7dda2462
TG		 1395 if (info->relocatable)
1396 return TRUE;
1397
ec338859 1398 elf_section_data (sec)->local_dynrel = NULL;
a85d7ed0 1399
0451c93c
MS		 1400 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1401 sym_hashes = elf_sym_hashes (abfd);
1402 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0
NC		 1403
1404 relend = relocs + sec->reloc_count;
1405 for (rel = relocs; rel < relend; rel++)
5236c819 1406 {
26e41594
AM		 1407 unsigned long r_symndx;
1408 unsigned int r_type;
1409 struct elf_link_hash_entry *h = NULL;
1410
5236c819 1411 r_symndx = ELF64_R_SYM (rel->r_info);
26e41594
AM		 1412 if (r_symndx >= symtab_hdr->sh_info)
1413 {
1414 struct elf_s390_link_hash_entry *eh;
1415 struct elf_s390_dyn_relocs **pp;
1416 struct elf_s390_dyn_relocs *p;
5236c819 1417
26e41594 1418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 1419 while (h->root.type == bfd_link_hash_indirect
1420 || h->root.type == bfd_link_hash_warning)
1421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 1422 eh = (struct elf_s390_link_hash_entry *) h;
5236c819 1423
26e41594
AM		 1424 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1425 if (p->sec == sec)
1426 {
1427 /* Everything must go for SEC. */
1428 *pp = p->next;
1429 break;
1430 }
1431 }
1432
1433 r_type = ELF64_R_TYPE (rel->r_info);
1434 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
69fc87f1 1435 switch (r_type)
5236c819 1436 {
69fc87f1
MS		 1437 case R_390_TLS_LDM64:
1438 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1439 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1440 break;
1441
1442 case R_390_TLS_GD64:
1443 case R_390_TLS_IE64:
1444 case R_390_TLS_GOTIE12:
bd1ea41b 1445 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1446 case R_390_TLS_GOTIE64:
1447 case R_390_TLS_IEENT:
5236c819
MS		 1448 case R_390_GOT12:
1449 case R_390_GOT16:
bd1ea41b 1450 case R_390_GOT20:
5236c819
MS		 1451 case R_390_GOT32:
1452 case R_390_GOT64:
1453 case R_390_GOTOFF16:
1454 case R_390_GOTOFF32:
1455 case R_390_GOTOFF64:
1456 case R_390_GOTPC:
1457 case R_390_GOTPCDBL:
1458 case R_390_GOTENT:
1459 if (h != NULL)
1460 {
1461 if (h->got.refcount > 0)
1462 h->got.refcount -= 1;
1463 }
1464 else if (local_got_refcounts != NULL)
1465 {
1466 if (local_got_refcounts[r_symndx] > 0)
1467 local_got_refcounts[r_symndx] -= 1;
1468 }
26e41594 1469 break;
a85d7ed0 1470
5236c819
MS		 1471 case R_390_8:
1472 case R_390_12:
1473 case R_390_16:
bd1ea41b 1474 case R_390_20:
5236c819
MS		 1475 case R_390_32:
1476 case R_390_64:
1477 case R_390_PC16:
1478 case R_390_PC16DBL:
1479 case R_390_PC32:
1480 case R_390_PC32DBL:
1481 case R_390_PC64:
26e41594
AM		 1482 if (info->shared)
1483 break;
1484 /* Fall through */
a85d7ed0 1485
69fc87f1
MS		 1486 case R_390_PLT16DBL:
1487 case R_390_PLT32:
1488 case R_390_PLT32DBL:
1489 case R_390_PLT64:
1490 case R_390_PLTOFF16:
1491 case R_390_PLTOFF32:
1492 case R_390_PLTOFF64:
1493 if (h != NULL)
1494 {
1495 if (h->plt.refcount > 0)
1496 h->plt.refcount -= 1;
1497 }
1498 break;
1499
1500 case R_390_GOTPLT12:
1501 case R_390_GOTPLT16:
bd1ea41b 1502 case R_390_GOTPLT20:
69fc87f1
MS		 1503 case R_390_GOTPLT32:
1504 case R_390_GOTPLT64:
1505 case R_390_GOTPLTENT:
1506 if (h != NULL)
1507 {
1508 if (h->plt.refcount > 0)
1509 {
1510 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1511 h->plt.refcount -= 1;
1512 }
1513 }
1514 else if (local_got_refcounts != NULL)
1515 {
1516 if (local_got_refcounts[r_symndx] > 0)
1517 local_got_refcounts[r_symndx] -= 1;
1518 }
1519 break;
1520
5236c819
MS		 1521 default:
1522 break;
1523 }
1524 }
a85d7ed0 1525
b34976b6 1526 return TRUE;
a85d7ed0
NC		 1527}
1528
5236c819
MS		 1529/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1530 entry but we found we will not create any. Called when we find we will
1531 not have any PLT for this symbol, by for example
1532 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1533 or elf_s390_size_dynamic_sections if no dynamic sections will be
1534 created (we're only linking static objects). */
1535
1536static void
1537elf_s390_adjust_gotplt (h)
1538 struct elf_s390_link_hash_entry *h;
1539{
1540 if (h->elf.root.type == bfd_link_hash_warning)
1541 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1542
1543 if (h->gotplt_refcount <= 0)
1544 return;
1545
1546 /* We simply add the number of gotplt references to the number
1547 * of got references for this symbol. */
1548 h->elf.got.refcount += h->gotplt_refcount;
1549 h->gotplt_refcount = -1;
1550}
1551
a85d7ed0
NC		 1552/* Adjust a symbol defined by a dynamic object and referenced by a
1553 regular object. The current definition is in some section of the
1554 dynamic object, but we're not including those sections. We have to
1555 change the definition to something the rest of the link can
1556 understand. */
1557
b34976b6 1558static bfd_boolean
a85d7ed0
NC		 1559elf_s390_adjust_dynamic_symbol (info, h)
1560 struct bfd_link_info *info;
1561 struct elf_link_hash_entry *h;
1562{
0451c93c 1563 struct elf_s390_link_hash_table *htab;
a85d7ed0 1564 asection *s;
a85d7ed0 1565
a85d7ed0
NC		 1566 /* If this is a function, put it in the procedure linkage table. We
1567 will fill in the contents of the procedure linkage table later
cedb70c5 1568 (although we could actually do it here). */
a85d7ed0 1569 if (h->type == STT_FUNC
f5385ebf 1570 || h->needs_plt)
a85d7ed0 1571 {
0451c93c
MS		 1572 if (h->plt.refcount <= 0
1573 || (! info->shared
f5385ebf
AM		 1574 && !h->def_dynamic
1575 && !h->ref_dynamic
f9cd9119
MS		 1576 && h->root.type != bfd_link_hash_undefweak
1577 && h->root.type != bfd_link_hash_undefined))
a85d7ed0
NC		 1578 {
1579 /* This case can occur if we saw a PLT32 reloc in an input
947216bf
AM		 1580 file, but the symbol was never referred to by a dynamic
1581 object, or if all references were garbage collected. In
0451c93c
MS		 1582 such a case, we don't actually need to build a procedure
1583 linkage table, and we can just do a PC32 reloc instead. */
a85d7ed0 1584 h->plt.offset = (bfd_vma) -1;
f5385ebf 1585 h->needs_plt = 0;
5236c819 1586 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
a85d7ed0
NC		 1587 }
1588
b34976b6 1589 return TRUE;
a85d7ed0 1590 }
bbd7ec4a 1591 else
0451c93c
MS		 1592 /* It's possible that we incorrectly decided a .plt reloc was
1593 needed for an R_390_PC32 reloc to a non-function sym in
1594 check_relocs. We can't decide accurately between function and
1595 non-function syms in check-relocs; Objects loaded later in
1596 the link may change h->type. So fix it now. */
bbd7ec4a 1597 h->plt.offset = (bfd_vma) -1;
a85d7ed0
NC		 1598
1599 /* If this is a weak symbol, and there is a real definition, the
1600 processor independent code will have arranged for us to see the
1601 real definition first, and we can just use the same value. */
f6e332e6 1602 if (h->u.weakdef != NULL)
a85d7ed0 1603 {
f6e332e6
AM		 1604 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1605 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1606 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1607 h->root.u.def.value = h->u.weakdef->root.u.def.value;
64285810 1608 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 1609 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 1610 return TRUE;
a85d7ed0
NC		 1611 }
1612
1613 /* This is a reference to a symbol defined by a dynamic object which
1614 is not a function. */
1615
1616 /* If we are creating a shared library, we must presume that the
1617 only references to the symbol are via the global offset table.
1618 For such cases we need not do anything here; the relocations will
1619 be handled correctly by relocate_section. */
1620 if (info->shared)
b34976b6 1621 return TRUE;
a85d7ed0
NC		 1622
1623 /* If there are no references to this symbol that do not use the
1624 GOT, we don't need to generate a copy reloc. */
f5385ebf 1625 if (!h->non_got_ref)
b34976b6 1626 return TRUE;
a85d7ed0 1627
0451c93c
MS		 1628 /* If -z nocopyreloc was given, we won't generate them either. */
1629 if (info->nocopyreloc)
1630 {
f5385ebf 1631 h->non_got_ref = 0;
b34976b6 1632 return TRUE;
0451c93c
MS		 1633 }
1634
64285810 1635 if (ELIMINATE_COPY_RELOCS)
0451c93c 1636 {
64285810
MS		 1637 struct elf_s390_link_hash_entry * eh;
1638 struct elf_s390_dyn_relocs *p;
0451c93c 1639
64285810
MS		 1640 eh = (struct elf_s390_link_hash_entry *) h;
1641 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1642 {
1643 s = p->sec->output_section;
1644 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1645 break;
1646 }
1647
1648 /* If we didn't find any dynamic relocs in read-only sections, then
1649 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1650 if (p == NULL)
1651 {
f5385ebf 1652 h->non_got_ref = 0;
64285810
MS		 1653 return TRUE;
1654 }
0451c93c
MS		 1655 }
1656
909272ee
AM		 1657 if (h->size == 0)
1658 {
1659 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1660 h->root.root.string);
1661 return TRUE;
1662 }
1663
a85d7ed0
NC		 1664 /* We must allocate the symbol in our .dynbss section, which will
1665 become part of the .bss section of the executable. There will be
1666 an entry for this symbol in the .dynsym section. The dynamic
1667 object will contain position independent code, so all references
1668 from the dynamic object to this symbol will go through the global
1669 offset table. The dynamic linker will use the .dynsym entry to
1670 determine the address it must put in the global offset table, so
1671 both the dynamic object and the regular object will refer to the
1672 same memory location for the variable. */
1673
0451c93c 1674 htab = elf_s390_hash_table (info);
a85d7ed0 1675
0451c93c
MS		 1676 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1677 copy the initial value out of the dynamic object and into the
1678 runtime process image. */
a85d7ed0
NC		 1679 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1680 {
eea6121a 1681 htab->srelbss->size += sizeof (Elf64_External_Rela);
f5385ebf 1682 h->needs_copy = 1;
a85d7ed0
NC		 1683 }
1684
0451c93c 1685 s = htab->sdynbss;
a85d7ed0 1686
027297b7 1687 return _bfd_elf_adjust_dynamic_copy (h, s);
a85d7ed0
NC		 1688}
1689
0451c93c
MS		 1690/* Allocate space in .plt, .got and associated reloc sections for
1691 dynamic relocs. */
1692
b34976b6 1693static bfd_boolean
0451c93c
MS		 1694allocate_dynrelocs (h, inf)
1695 struct elf_link_hash_entry *h;
1696 PTR inf;
1697{
1698 struct bfd_link_info *info;
1699 struct elf_s390_link_hash_table *htab;
1700 struct elf_s390_link_hash_entry *eh;
1701 struct elf_s390_dyn_relocs *p;
1702
e92d460e 1703 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1704 return TRUE;
0451c93c 1705
e92d460e 1706 if (h->root.type == bfd_link_hash_warning)
5236c819
MS		 1707 /* When warning symbols are created, they **replace** the "real"
1708 entry in the hash table, thus we never get to see the real
1709 symbol in a hash traversal. So look at it now. */
e92d460e
AM		 1710 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1711
0451c93c
MS		 1712 info = (struct bfd_link_info *) inf;
1713 htab = elf_s390_hash_table (info);
1714
1715 if (htab->elf.dynamic_sections_created
82058a73
MS		 1716 && h->plt.refcount > 0
1717 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1718 || h->root.type != bfd_link_hash_undefweak))
0451c93c
MS		 1719 {
1720 /* Make sure this symbol is output as a dynamic symbol.
1721 Undefined weak syms won't yet be marked as dynamic. */
1722 if (h->dynindx == -1
f5385ebf 1723 && !h->forced_local)
0451c93c 1724 {
c152c796 1725 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1726 return FALSE;
0451c93c
MS		 1727 }
1728
82058a73 1729 if (info->shared
4ec72bde 1730 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
0451c93c
MS		 1731 {
1732 asection *s = htab->splt;
1733
1734 /* If this is the first .plt entry, make room for the special
1735 first entry. */
eea6121a
AM		 1736 if (s->size == 0)
1737 s->size += PLT_FIRST_ENTRY_SIZE;
0451c93c 1738
eea6121a 1739 h->plt.offset = s->size;
0451c93c
MS		 1740
1741 /* If this symbol is not defined in a regular file, and we are
1742 not generating a shared library, then set the symbol to this
1743 location in the .plt. This is required to make function
1744 pointers compare as equal between the normal executable and
1745 the shared library. */
1746 if (! info->shared
f5385ebf 1747 && !h->def_regular)
0451c93c
MS		 1748 {
1749 h->root.u.def.section = s;
1750 h->root.u.def.value = h->plt.offset;
1751 }
ec338859 1752
0451c93c 1753 /* Make room for this entry. */
eea6121a 1754 s->size += PLT_ENTRY_SIZE;
ec338859 1755
0451c93c
MS		 1756 /* We also need to make an entry in the .got.plt section, which
1757 will be placed in the .got section by the linker script. */
eea6121a 1758 htab->sgotplt->size += GOT_ENTRY_SIZE;
0451c93c
MS		 1759
1760 /* We also need to make an entry in the .rela.plt section. */
eea6121a 1761 htab->srelplt->size += sizeof (Elf64_External_Rela);
0451c93c
MS		 1762 }
1763 else
1764 {
1765 h->plt.offset = (bfd_vma) -1;
f5385ebf 1766 h->needs_plt = 0;
5236c819 1767 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1768 }
1769 }
1770 else
1771 {
1772 h->plt.offset = (bfd_vma) -1;
f5385ebf 1773 h->needs_plt = 0;
5236c819 1774 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1775 }
1776
69fc87f1
MS		 1777 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1778 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1779 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1780 we can save the dynamic TLS relocation. */
1781 if (h->got.refcount > 0
1782 && !info->shared
1783 && h->dynindx == -1
1784 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1785 {
1786 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1787 /* For the GOTIE access without a literal pool entry the offset has
1788 to be stored somewhere. The immediate value in the instruction
1789 is not bit enough so the value is stored in the got. */
1790 {
eea6121a
AM		 1791 h->got.offset = htab->sgot->size;
1792 htab->sgot->size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1793 }
1794 else
1795 h->got.offset = (bfd_vma) -1;
1796 }
1797 else if (h->got.refcount > 0)
0451c93c
MS		 1798 {
1799 asection *s;
b34976b6 1800 bfd_boolean dyn;
69fc87f1 1801 int tls_type = elf_s390_hash_entry(h)->tls_type;
0451c93c
MS		 1802
1803 /* Make sure this symbol is output as a dynamic symbol.
1804 Undefined weak syms won't yet be marked as dynamic. */
1805 if (h->dynindx == -1
f5385ebf 1806 && !h->forced_local)
0451c93c 1807 {
c152c796 1808 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1809 return FALSE;
0451c93c
MS		 1810 }
1811
1812 s = htab->sgot;
eea6121a
AM		 1813 h->got.offset = s->size;
1814 s->size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1815 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1816 if (tls_type == GOT_TLS_GD)
eea6121a 1817 s->size += GOT_ENTRY_SIZE;
0451c93c 1818 dyn = htab->elf.dynamic_sections_created;
69fc87f1
MS		 1819 /* R_390_TLS_IE64 needs one dynamic relocation,
1820 R_390_TLS_GD64 needs one if local symbol and two if global. */
1821 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1822 || tls_type >= GOT_TLS_IE)
eea6121a 1823 htab->srelgot->size += sizeof (Elf64_External_Rela);
69fc87f1 1824 else if (tls_type == GOT_TLS_GD)
eea6121a 1825 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
82058a73
MS		 1826 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1827 || h->root.type != bfd_link_hash_undefweak)
1828 && (info->shared
1829 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
eea6121a 1830 htab->srelgot->size += sizeof (Elf64_External_Rela);
0451c93c
MS		 1831 }
1832 else
1833 h->got.offset = (bfd_vma) -1;
1834
1835 eh = (struct elf_s390_link_hash_entry *) h;
1836 if (eh->dyn_relocs == NULL)
b34976b6 1837 return TRUE;
0451c93c
MS		 1838
1839 /* In the shared -Bsymbolic case, discard space allocated for
1840 dynamic pc-relative relocs against symbols which turn out to be
1841 defined in regular objects. For the normal shared case, discard
1842 space for pc-relative relocs that have become local due to symbol
1843 visibility changes. */
1844
1845 if (info->shared)
1846 {
1c3ff0f2 1847 if (SYMBOL_REFERENCES_LOCAL (info, h))
0451c93c
MS		 1848 {
1849 struct elf_s390_dyn_relocs **pp;
1850
1851 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1852 {
1853 p->count -= p->pc_count;
1854 p->pc_count = 0;
1855 if (p->count == 0)
1856 *pp = p->next;
1857 else
1858 pp = &p->next;
1859 }
1860 }
82058a73
MS		 1861
1862 /* Also discard relocs on undefined weak syms with non-default
1863 visibility. */
22d606e9 1864 if (eh->dyn_relocs != NULL
82058a73 1865 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM		 1866 {
1867 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1868 eh->dyn_relocs = NULL;
1869
1870 /* Make sure undefined weak symbols are output as a dynamic
1871 symbol in PIEs. */
1872 else if (h->dynindx == -1
1873 && !h->forced_local)
1874 {
1875 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1876 return FALSE;
1877 }
1878 }
0451c93c 1879 }
64285810 1880 else if (ELIMINATE_COPY_RELOCS)
0451c93c
MS		 1881 {
1882 /* For the non-shared case, discard space for relocs against
1883 symbols which turn out to need copy relocs or are not
1884 dynamic. */
1885
f5385ebf
AM		 1886 if (!h->non_got_ref
1887 && ((h->def_dynamic
1888 && !h->def_regular)
0451c93c
MS		 1889 || (htab->elf.dynamic_sections_created
1890 && (h->root.type == bfd_link_hash_undefweak
1891 || h->root.type == bfd_link_hash_undefined))))
1892 {
1893 /* Make sure this symbol is output as a dynamic symbol.
1894 Undefined weak syms won't yet be marked as dynamic. */
1895 if (h->dynindx == -1
f5385ebf 1896 && !h->forced_local)
0451c93c 1897 {
c152c796 1898 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1899 return FALSE;
0451c93c
MS		 1900 }
1901
1902 /* If that succeeded, we know we'll be keeping all the
1903 relocs. */
1904 if (h->dynindx != -1)
1905 goto keep;
1906 }
1907
1908 eh->dyn_relocs = NULL;
1909
ec338859 1910 keep: ;
0451c93c
MS		 1911 }
1912
1913 /* Finally, allocate space. */
1914 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1915 {
1916 asection *sreloc = elf_section_data (p->sec)->sreloc;
eea6121a 1917 sreloc->size += p->count * sizeof (Elf64_External_Rela);
0451c93c
MS		 1918 }
1919
b34976b6 1920 return TRUE;
0451c93c
MS		 1921}
1922
1923/* Find any dynamic relocs that apply to read-only sections. */
1924
b34976b6 1925static bfd_boolean
0451c93c
MS		 1926readonly_dynrelocs (h, inf)
1927 struct elf_link_hash_entry *h;
1928 PTR inf;
1929{
1930 struct elf_s390_link_hash_entry *eh;
1931 struct elf_s390_dyn_relocs *p;
1932
e92d460e
AM		 1933 if (h->root.type == bfd_link_hash_warning)
1934 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1935
0451c93c
MS		 1936 eh = (struct elf_s390_link_hash_entry *) h;
1937 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1938 {
1939 asection *s = p->sec->output_section;
1940
1941 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1942 {
1943 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1944
1945 info->flags |= DF_TEXTREL;
1946
1947 /* Not an error, just cut short the traversal. */
b34976b6 1948 return FALSE;
0451c93c
MS		 1949 }
1950 }
b34976b6 1951 return TRUE;
0451c93c
MS		 1952}
1953
a85d7ed0
NC		 1954/* Set the sizes of the dynamic sections. */
1955
b34976b6 1956static bfd_boolean
a85d7ed0 1957elf_s390_size_dynamic_sections (output_bfd, info)
29c2fb7c 1958 bfd *output_bfd ATTRIBUTE_UNUSED;
a85d7ed0
NC		 1959 struct bfd_link_info *info;
1960{
0451c93c 1961 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1962 bfd *dynobj;
1963 asection *s;
b34976b6 1964 bfd_boolean relocs;
0451c93c 1965 bfd *ibfd;
a85d7ed0 1966
0451c93c
MS		 1967 htab = elf_s390_hash_table (info);
1968 dynobj = htab->elf.dynobj;
1969 if (dynobj == NULL)
1970 abort ();
a85d7ed0 1971
0451c93c 1972 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 1973 {
1974 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 1975 if (info->executable)
a85d7ed0
NC		 1976 {
1977 s = bfd_get_section_by_name (dynobj, ".interp");
0451c93c
MS		 1978 if (s == NULL)
1979 abort ();
eea6121a 1980 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
a85d7ed0
NC		 1981 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1982 }
1983 }
a85d7ed0 1984
0451c93c
MS		 1985 /* Set up .got offsets for local syms, and space for local dynamic
1986 relocs. */
1987 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
a85d7ed0 1988 {
0451c93c
MS		 1989 bfd_signed_vma *local_got;
1990 bfd_signed_vma *end_local_got;
69fc87f1 1991 char *local_tls_type;
0451c93c
MS		 1992 bfd_size_type locsymcount;
1993 Elf_Internal_Shdr *symtab_hdr;
1994 asection *srela;
a85d7ed0 1995
0451c93c 1996 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
a85d7ed0
NC		 1997 continue;
1998
0451c93c 1999 for (s = ibfd->sections; s != NULL; s = s->next)
a85d7ed0 2000 {
ec338859 2001 struct elf_s390_dyn_relocs *p;
0451c93c 2002
6edfbbad 2003 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
a85d7ed0 2004 {
ec338859
AM		 2005 if (!bfd_is_abs_section (p->sec)
2006 && bfd_is_abs_section (p->sec->output_section))
2007 {
2008 /* Input section has been discarded, either because
2009 it is a copy of a linkonce section or due to
2010 linker script /DISCARD/, so we'll be discarding
2011 the relocs too. */
2012 }
248866a8 2013 else if (p->count != 0)
ec338859
AM		 2014 {
2015 srela = elf_section_data (p->sec)->sreloc;
eea6121a 2016 srela->size += p->count * sizeof (Elf64_External_Rela);
248866a8
AM		 2017 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2018 info->flags |= DF_TEXTREL;
ec338859 2019 }
a85d7ed0
NC		 2020 }
2021 }
0451c93c
MS		 2022
2023 local_got = elf_local_got_refcounts (ibfd);
2024 if (!local_got)
2025 continue;
2026
2027 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2028 locsymcount = symtab_hdr->sh_info;
2029 end_local_got = local_got + locsymcount;
69fc87f1 2030 local_tls_type = elf_s390_local_got_tls_type (ibfd);
0451c93c
MS		 2031 s = htab->sgot;
2032 srela = htab->srelgot;
69fc87f1 2033 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
a85d7ed0 2034 {
0451c93c 2035 if (*local_got > 0)
a85d7ed0 2036 {
eea6121a
AM		 2037 *local_got = s->size;
2038 s->size += GOT_ENTRY_SIZE;
69fc87f1 2039 if (*local_tls_type == GOT_TLS_GD)
eea6121a 2040 s->size += GOT_ENTRY_SIZE;
0451c93c 2041 if (info->shared)
eea6121a 2042 srela->size += sizeof (Elf64_External_Rela);
a85d7ed0
NC		 2043 }
2044 else
0451c93c 2045 *local_got = (bfd_vma) -1;
a85d7ed0 2046 }
0451c93c
MS		 2047 }
2048
69fc87f1
MS		 2049 if (htab->tls_ldm_got.refcount > 0)
2050 {
2051 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2052 relocs. */
eea6121a
AM		 2053 htab->tls_ldm_got.offset = htab->sgot->size;
2054 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2055 htab->srelgot->size += sizeof (Elf64_External_Rela);
69fc87f1
MS		 2056 }
2057 else
2058 htab->tls_ldm_got.offset = -1;
2059
0451c93c
MS		 2060 /* Allocate global sym .plt and .got entries, and space for global
2061 sym dynamic relocs. */
2062 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2063
2064 /* We now have determined the sizes of the various dynamic sections.
2065 Allocate memory for them. */
b34976b6 2066 relocs = FALSE;
0451c93c
MS		 2067 for (s = dynobj->sections; s != NULL; s = s->next)
2068 {
2069 if ((s->flags & SEC_LINKER_CREATED) == 0)
2070 continue;
2071
2072 if (s == htab->splt
2073 || s == htab->sgot
c456f082
AM		 2074 || s == htab->sgotplt
2075 || s == htab->sdynbss)
0451c93c
MS		 2076 {
2077 /* Strip this section if we don't need it; see the
2078 comment below. */
2079 }
0112cd26 2080 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
0451c93c 2081 {
eea6121a 2082 if (s->size != 0 && s != htab->srelplt)
b34976b6 2083 relocs = TRUE;
ec338859 2084
0451c93c
MS		 2085 /* We use the reloc_count field as a counter if we need
2086 to copy relocs into the output file. */
2087 s->reloc_count = 0;
2088 }
2089 else
a85d7ed0
NC		 2090 {
2091 /* It's not one of our sections, so don't allocate space. */
2092 continue;
2093 }
2094
eea6121a 2095 if (s->size == 0)
a85d7ed0 2096 {
0451c93c
MS		 2097 /* If we don't need this section, strip it from the
2098 output file. This is to handle .rela.bss and
2099 .rela.plt. We must create it in
2100 create_dynamic_sections, because it must be created
2101 before the linker maps input sections to output
2102 sections. The linker does that before
2103 adjust_dynamic_symbol is called, and it is that
2104 function which decides whether anything needs to go
2105 into these sections. */
2106
8423293d 2107 s->flags |= SEC_EXCLUDE;
a85d7ed0
NC		 2108 continue;
2109 }
2110
c456f082
AM		 2111 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2112 continue;
2113
0451c93c
MS		 2114 /* Allocate memory for the section contents. We use bfd_zalloc
2115 here in case unused entries are not reclaimed before the
2116 section's contents are written out. This should not happen,
2117 but this way if it does, we get a R_390_NONE reloc instead
2118 of garbage. */
eea6121a 2119 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
0451c93c 2120 if (s->contents == NULL)
b34976b6 2121 return FALSE;
a85d7ed0
NC		 2122 }
2123
0451c93c 2124 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 2125 {
2126 /* Add some entries to the .dynamic section. We fill in the
2127 values later, in elf_s390_finish_dynamic_sections, but we
2128 must add the entries now so that we get the correct size for
2129 the .dynamic section. The DT_DEBUG entry is filled in by the
2130 dynamic linker and used by the debugger. */
dc810e39 2131#define add_dynamic_entry(TAG, VAL) \
5a580b3a 2132 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 2133
36af4a4e 2134 if (info->executable)
a85d7ed0 2135 {
dc810e39 2136 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2137 return FALSE;
a85d7ed0
NC		 2138 }
2139
eea6121a 2140 if (htab->splt->size != 0)
a85d7ed0 2141 {
dc810e39
AM		 2142 if (!add_dynamic_entry (DT_PLTGOT, 0)
2143 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2144 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2145 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 2146 return FALSE;
a85d7ed0
NC		 2147 }
2148
2149 if (relocs)
947216bf
AM		 2150 {
2151 if (!add_dynamic_entry (DT_RELA, 0)
2152 || !add_dynamic_entry (DT_RELASZ, 0)
2153 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
b34976b6 2154 return FALSE;
ec338859 2155
0451c93c
MS		 2156 /* If any dynamic relocs apply to a read-only section,
2157 then we need a DT_TEXTREL entry. */
248866a8
AM		 2158 if ((info->flags & DF_TEXTREL) == 0)
2159 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2160 (PTR) info);
ec338859 2161
0451c93c
MS		 2162 if ((info->flags & DF_TEXTREL) != 0)
2163 {
2164 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2165 return FALSE;
0451c93c 2166 }
a85d7ed0
NC		 2167 }
2168 }
dc810e39 2169#undef add_dynamic_entry
a85d7ed0 2170
b34976b6 2171 return TRUE;
a85d7ed0
NC		 2172}
2173
69fc87f1
MS		 2174/* Return the base VMA address which should be subtracted from real addresses
2175 when resolving @dtpoff relocation.
2176 This is PT_TLS segment p_vaddr. */
2177
2178static bfd_vma
2179dtpoff_base (info)
2180 struct bfd_link_info *info;
2181{
e1918d23
AM		 2182 /* If tls_sec is NULL, we should have signalled an error already. */
2183 if (elf_hash_table (info)->tls_sec == NULL)
69fc87f1 2184 return 0;
e1918d23 2185 return elf_hash_table (info)->tls_sec->vma;
69fc87f1
MS		 2186}
2187
2188/* Return the relocation value for @tpoff relocation
2189 if STT_TLS virtual address is ADDRESS. */
2190
2191static bfd_vma
2192tpoff (info, address)
2193 struct bfd_link_info *info;
2194 bfd_vma address;
2195{
e1918d23 2196 struct elf_link_hash_table *htab = elf_hash_table (info);
69fc87f1 2197
e1918d23
AM		 2198 /* If tls_sec is NULL, we should have signalled an error already. */
2199 if (htab->tls_sec == NULL)
69fc87f1 2200 return 0;
e1918d23 2201 return htab->tls_size + htab->tls_sec->vma - address;
69fc87f1
MS		 2202}
2203
2204/* Complain if TLS instruction relocation is against an invalid
2205 instruction. */
2206
2207static void
2208invalid_tls_insn (input_bfd, input_section, rel)
2209 bfd *input_bfd;
2210 asection *input_section;
2211 Elf_Internal_Rela *rel;
2212{
2213 reloc_howto_type *howto;
2214
2215 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2216 (*_bfd_error_handler)
d003868e
AM		 2217 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2218 input_bfd,
2219 input_section,
69fc87f1
MS		 2220 (long) rel->r_offset,
2221 howto->name);
77df2968 2222 bfd_set_error (bfd_error_bad_value);
69fc87f1
MS		 2223}
2224
a85d7ed0
NC		 2225/* Relocate a 390 ELF section. */
2226
b34976b6 2227static bfd_boolean
a85d7ed0
NC		 2228elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2229 contents, relocs, local_syms, local_sections)
2230 bfd *output_bfd;
2231 struct bfd_link_info *info;
2232 bfd *input_bfd;
2233 asection *input_section;
2234 bfd_byte *contents;
2235 Elf_Internal_Rela *relocs;
2236 Elf_Internal_Sym *local_syms;
2237 asection **local_sections;
2238{
0451c93c 2239 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 2240 Elf_Internal_Shdr *symtab_hdr;
2241 struct elf_link_hash_entry **sym_hashes;
2242 bfd_vma *local_got_offsets;
a85d7ed0
NC		 2243 Elf_Internal_Rela *rel;
2244 Elf_Internal_Rela *relend;
2245
0451c93c 2246 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 2247 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2248 sym_hashes = elf_sym_hashes (input_bfd);
2249 local_got_offsets = elf_local_got_offsets (input_bfd);
2250
a85d7ed0
NC		 2251 rel = relocs;
2252 relend = relocs + input_section->reloc_count;
2253 for (; rel < relend; rel++)
2254 {
5236c819 2255 unsigned int r_type;
a85d7ed0
NC		 2256 reloc_howto_type *howto;
2257 unsigned long r_symndx;
2258 struct elf_link_hash_entry *h;
2259 Elf_Internal_Sym *sym;
2260 asection *sec;
0451c93c 2261 bfd_vma off;
a85d7ed0 2262 bfd_vma relocation;
b34976b6 2263 bfd_boolean unresolved_reloc;
a85d7ed0 2264 bfd_reloc_status_type r;
69fc87f1 2265 int tls_type;
a85d7ed0
NC		 2266
2267 r_type = ELF64_R_TYPE (rel->r_info);
0451c93c 2268 if (r_type == (int) R_390_GNU_VTINHERIT
947216bf
AM		 2269 || r_type == (int) R_390_GNU_VTENTRY)
2270 continue;
5236c819 2271 if (r_type >= (int) R_390_max)
a85d7ed0
NC		 2272 {
2273 bfd_set_error (bfd_error_bad_value);
b34976b6 2274 return FALSE;
a85d7ed0 2275 }
a85d7ed0 2276
b491616a 2277 howto = elf_howto_table + r_type;
a85d7ed0 2278 r_symndx = ELF64_R_SYM (rel->r_info);
5236c819 2279
a85d7ed0
NC		 2280 h = NULL;
2281 sym = NULL;
2282 sec = NULL;
b34976b6 2283 unresolved_reloc = FALSE;
a85d7ed0
NC		 2284 if (r_symndx < symtab_hdr->sh_info)
2285 {
2286 sym = local_syms + r_symndx;
2287 sec = local_sections[r_symndx];
8517fae7 2288 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
a85d7ed0
NC		 2289 }
2290 else
2291 {
560e09e9 2292 bfd_boolean warned ATTRIBUTE_UNUSED;
0451c93c 2293
b2a8e766
AM		 2294 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2295 r_symndx, symtab_hdr, sym_hashes,
2296 h, sec, relocation,
2297 unresolved_reloc, warned);
a85d7ed0
NC		 2298 }
2299
ab96bf03
AM		 2300 if (sec != NULL && elf_discarded_section (sec))
2301 {
2302 /* For relocs against symbols from removed linkonce sections,
2303 or sections discarded by a linker script, we just want the
2304 section contents zeroed. Avoid any special processing. */
2305 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2306 rel->r_info = 0;
2307 rel->r_addend = 0;
2308 continue;
2309 }
2310
2311 if (info->relocatable)
2312 continue;
2313
a85d7ed0
NC		 2314 switch (r_type)
2315 {
5236c819
MS		 2316 case R_390_GOTPLT12:
2317 case R_390_GOTPLT16:
bd1ea41b 2318 case R_390_GOTPLT20:
5236c819
MS		 2319 case R_390_GOTPLT32:
2320 case R_390_GOTPLT64:
2321 case R_390_GOTPLTENT:
2322 /* There are three cases for a GOTPLT relocation. 1) The
2323 relocation is against the jump slot entry of a plt that
2324 will get emitted to the output file. 2) The relocation
2325 is against the jump slot of a plt entry that has been
2326 removed. elf_s390_adjust_gotplt has created a GOT entry
2327 as replacement. 3) The relocation is against a local symbol.
2328 Cases 2) and 3) are the same as the GOT relocation code
2329 so we just have to test for case 1 and fall through for
2330 the other two. */
2331 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2332 {
2333 bfd_vma plt_index;
2334
2335 /* Calc. index no.
2336 Current offset - size first entry / entry size. */
2337 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2338 PLT_ENTRY_SIZE;
26e41594 2339
5236c819
MS		 2340 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2341 addr & GOT addr. */
2342 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2343 unresolved_reloc = FALSE;
2344
2345 if (r_type == R_390_GOTPLTENT)
26e41594 2346 relocation += htab->sgot->output_section->vma;
5236c819
MS		 2347 break;
2348 }
2349 /* Fall through. */
2350
947216bf
AM		 2351 case R_390_GOT12:
2352 case R_390_GOT16:
bd1ea41b 2353 case R_390_GOT20:
947216bf
AM		 2354 case R_390_GOT32:
2355 case R_390_GOT64:
2356 case R_390_GOTENT:
2357 /* Relocation is to the entry for this symbol in the global
2358 offset table. */
0451c93c
MS		 2359 if (htab->sgot == NULL)
2360 abort ();
a85d7ed0 2361
947216bf
AM		 2362 if (h != NULL)
2363 {
b34976b6 2364 bfd_boolean dyn;
a85d7ed0 2365
947216bf 2366 off = h->got.offset;
0451c93c 2367 dyn = htab->elf.dynamic_sections_created;
4ec72bde 2368 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
947216bf
AM		 2369 || (info->shared
2370 && (info->symbolic
0451c93c 2371 || h->dynindx == -1
f5385ebf
AM		 2372 || h->forced_local)
2373 && h->def_regular)
82058a73
MS		 2374 || (ELF_ST_VISIBILITY (h->other)
2375 && h->root.type == bfd_link_hash_undefweak))
947216bf
AM		 2376 {
2377 /* This is actually a static link, or it is a
2378 -Bsymbolic link and the symbol is defined
2379 locally, or the symbol was forced to be local
2380 because of a version file. We must initialize
2381 this entry in the global offset table. Since the
2382 offset must always be a multiple of 2, we use the
2383 least significant bit to record whether we have
2384 initialized it already.
2385
2386 When doing a dynamic link, we create a .rel.got
2387 relocation entry to initialize the value. This
2388 is done in the finish_dynamic_symbol routine. */
2389 if ((off & 1) != 0)
2390 off &= ~1;
2391 else
2392 {
a85d7ed0 2393 bfd_put_64 (output_bfd, relocation,
0451c93c 2394 htab->sgot->contents + off);
947216bf
AM		 2395 h->got.offset |= 1;
2396 }
2397 }
0451c93c 2398 else
b34976b6 2399 unresolved_reloc = FALSE;
947216bf
AM		 2400 }
2401 else
2402 {
0451c93c
MS		 2403 if (local_got_offsets == NULL)
2404 abort ();
a85d7ed0 2405
947216bf 2406 off = local_got_offsets[r_symndx];
a85d7ed0 2407
947216bf
AM		 2408 /* The offset must always be a multiple of 8. We use
2409 the least significant bit to record whether we have
2410 already generated the necessary reloc. */
2411 if ((off & 1) != 0)
2412 off &= ~1;
2413 else
2414 {
2415 bfd_put_64 (output_bfd, relocation,
0451c93c 2416 htab->sgot->contents + off);
a85d7ed0 2417
947216bf
AM		 2418 if (info->shared)
2419 {
2420 asection *s;
2421 Elf_Internal_Rela outrel;
2422 bfd_byte *loc;
a85d7ed0 2423
947216bf
AM		 2424 s = htab->srelgot;
2425 if (s == NULL)
0451c93c 2426 abort ();
a85d7ed0 2427
947216bf
AM		 2428 outrel.r_offset = (htab->sgot->output_section->vma
2429 + htab->sgot->output_offset
2430 + off);
2431 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
a85d7ed0 2432 outrel.r_addend = relocation;
947216bf
AM		 2433 loc = s->contents;
2434 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2435 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2436 }
a85d7ed0 2437
947216bf
AM		 2438 local_got_offsets[r_symndx] |= 1;
2439 }
2440 }
a85d7ed0 2441
0451c93c
MS		 2442 if (off >= (bfd_vma) -2)
2443 abort ();
2444
2445 relocation = htab->sgot->output_offset + off;
2446
ae9a127f
NC		 2447 /* For @GOTENT the relocation is against the offset between
2448 the instruction and the symbols entry in the GOT and not
2449 between the start of the GOT and the symbols entry. We
2450 add the vma of the GOT to get the correct value. */
5236c819
MS		 2451 if ( r_type == R_390_GOTENT
2452 || r_type == R_390_GOTPLTENT)
0451c93c 2453 relocation += htab->sgot->output_section->vma;
a85d7ed0 2454
947216bf 2455 break;
99c79b2e 2456
5236c819
MS		 2457 case R_390_GOTOFF16:
2458 case R_390_GOTOFF32:
2459 case R_390_GOTOFF64:
947216bf
AM		 2460 /* Relocation is relative to the start of the global offset
2461 table. */
a85d7ed0 2462
947216bf
AM		 2463 /* Note that sgot->output_offset is not involved in this
2464 calculation. We always want the start of .got. If we
2465 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2466 permitted by the ABI, we might have to change this
2467 calculation. */
2468 relocation -= htab->sgot->output_section->vma;
947216bf 2469 break;
a85d7ed0 2470
947216bf 2471 case R_390_GOTPC:
a85d7ed0 2472 case R_390_GOTPCDBL:
947216bf
AM		 2473 /* Use global offset table as symbol value. */
2474 relocation = htab->sgot->output_section->vma;
b34976b6 2475 unresolved_reloc = FALSE;
947216bf 2476 break;
a85d7ed0 2477
947216bf
AM		 2478 case R_390_PLT16DBL:
2479 case R_390_PLT32:
2480 case R_390_PLT32DBL:
2481 case R_390_PLT64:
2482 /* Relocation is to the entry for this symbol in the
2483 procedure linkage table. */
a85d7ed0 2484
947216bf
AM		 2485 /* Resolve a PLT32 reloc against a local symbol directly,
2486 without using the procedure linkage table. */
2487 if (h == NULL)
2488 break;
a85d7ed0 2489
947216bf 2490 if (h->plt.offset == (bfd_vma) -1
0451c93c 2491 || htab->splt == NULL)
947216bf
AM		 2492 {
2493 /* We didn't make a PLT entry for this symbol. This
2494 happens when statically linking PIC code, or when
2495 using -Bsymbolic. */
2496 break;
2497 }
2498
2499 relocation = (htab->splt->output_section->vma
2500 + htab->splt->output_offset
2501 + h->plt.offset);
b34976b6 2502 unresolved_reloc = FALSE;
26e41594 2503 break;
5236c819
MS		 2504
2505 case R_390_PLTOFF16:
2506 case R_390_PLTOFF32:
2507 case R_390_PLTOFF64:
26e41594
AM		 2508 /* Relocation is to the entry for this symbol in the
2509 procedure linkage table relative to the start of the GOT. */
5236c819
MS		 2510
2511 /* For local symbols or if we didn't make a PLT entry for
2512 this symbol resolve the symbol directly. */
26e41594 2513 if ( h == NULL
5236c819
MS		 2514 || h->plt.offset == (bfd_vma) -1
2515 || htab->splt == NULL)
2516 {
2517 relocation -= htab->sgot->output_section->vma;
2518 break;
2519 }
2520
26e41594
AM		 2521 relocation = (htab->splt->output_section->vma
2522 + htab->splt->output_offset
2523 + h->plt.offset
5236c819
MS		 2524 - htab->sgot->output_section->vma);
2525 unresolved_reloc = FALSE;
947216bf
AM		 2526 break;
2527
2528 case R_390_8:
2529 case R_390_16:
2530 case R_390_32:
2531 case R_390_64:
2532 case R_390_PC16:
2533 case R_390_PC16DBL:
2534 case R_390_PC32:
a85d7ed0 2535 case R_390_PC32DBL:
947216bf 2536 case R_390_PC64:
b1e24c02 2537 if ((input_section->flags & SEC_ALLOC) == 0)
ec338859
AM		 2538 break;
2539
947216bf 2540 if ((info->shared
82058a73
MS		 2541 && (h == NULL
2542 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2543 || h->root.type != bfd_link_hash_undefweak)
0451c93c
MS		 2544 && ((r_type != R_390_PC16
2545 && r_type != R_390_PC16DBL
2546 && r_type != R_390_PC32
2547 && r_type != R_390_PC32DBL
2548 && r_type != R_390_PC64)
2549 || (h != NULL
1c3ff0f2 2550 && !SYMBOL_REFERENCES_LOCAL (info, h))))
64285810
MS		 2551 || (ELIMINATE_COPY_RELOCS
2552 && !info->shared
0451c93c
MS		 2553 && h != NULL
2554 && h->dynindx != -1
f5385ebf
AM		 2555 && !h->non_got_ref
2556 && ((h->def_dynamic
2557 && !h->def_regular)
0451c93c
MS		 2558 || h->root.type == bfd_link_hash_undefweak
2559 || h->root.type == bfd_link_hash_undefined)))
947216bf
AM		 2560 {
2561 Elf_Internal_Rela outrel;
b34976b6 2562 bfd_boolean skip, relocate;
0451c93c 2563 asection *sreloc;
947216bf 2564 bfd_byte *loc;
a85d7ed0 2565
947216bf
AM		 2566 /* When generating a shared object, these relocations
2567 are copied into the output file to be resolved at run
2568 time. */
b34976b6
AM		 2569 skip = FALSE;
2570 relocate = FALSE;
a85d7ed0 2571
c629eae0
JJ		 2572 outrel.r_offset =
2573 _bfd_elf_section_offset (output_bfd, info, input_section,
2574 rel->r_offset);
2575 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2576 skip = TRUE;
0bb2d96a 2577 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2578 skip = TRUE, relocate = TRUE;
a85d7ed0 2579
947216bf
AM		 2580 outrel.r_offset += (input_section->output_section->vma
2581 + input_section->output_offset);
a85d7ed0 2582
947216bf 2583 if (skip)
0bb2d96a 2584 memset (&outrel, 0, sizeof outrel);
947216bf 2585 else if (h != NULL
0451c93c
MS		 2586 && h->dynindx != -1
2587 && (r_type == R_390_PC16
2588 || r_type == R_390_PC16DBL
2589 || r_type == R_390_PC32
2590 || r_type == R_390_PC32DBL
2591 || r_type == R_390_PC64
2592 || !info->shared
2593 || !info->symbolic
f5385ebf 2594 || !h->def_regular))
947216bf
AM		 2595 {
2596 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
27018c3f 2597 outrel.r_addend = rel->r_addend;
947216bf
AM		 2598 }
2599 else
2600 {
0451c93c 2601 /* This symbol is local, or marked to become local. */
90ced0dd 2602 outrel.r_addend = relocation + rel->r_addend;
b5727d75
MS		 2603 if (r_type == R_390_64)
2604 {
2605 relocate = TRUE;
2606 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
b5727d75
MS		 2607 }
2608 else
2609 {
2610 long sindx;
2611
90ced0dd 2612 if (bfd_is_abs_section (sec))
b5727d75
MS		 2613 sindx = 0;
2614 else if (sec == NULL || sec->owner == NULL)
2615 {
2616 bfd_set_error(bfd_error_bad_value);
2617 return FALSE;
2618 }
2619 else
2620 {
2621 asection *osec;
2622
2623 osec = sec->output_section;
2624 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 2625
2626 if (sindx == 0)
2627 {
2628 osec = htab->elf.text_index_section;
2629 sindx = elf_section_data (osec)->dynindx;
2630 }
2631 BFD_ASSERT (sindx != 0);
90ced0dd
MS		 2632
2633 /* We are turning this relocation into one
2634 against a section symbol, so subtract out
2635 the output section's address but not the
2636 offset of the input section in the output
2637 section. */
90ced0dd 2638 outrel.r_addend -= osec->vma;
b5727d75
MS		 2639 }
2640 outrel.r_info = ELF64_R_INFO (sindx, r_type);
b5727d75 2641 }
0451c93c 2642 }
a85d7ed0 2643
0451c93c
MS		 2644 sreloc = elf_section_data (input_section)->sreloc;
2645 if (sreloc == NULL)
2646 abort ();
2647
947216bf
AM		 2648 loc = sreloc->contents;
2649 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2650 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
a85d7ed0 2651
947216bf
AM		 2652 /* If this reloc is against an external symbol, we do
2653 not want to fiddle with the addend. Otherwise, we
2654 need to include the symbol value so that it becomes
2655 an addend for the dynamic reloc. */
2656 if (! relocate)
2657 continue;
2658 }
a85d7ed0 2659
947216bf 2660 break;
a85d7ed0 2661
69fc87f1
MS		 2662 /* Relocations for tls literal pool entries. */
2663 case R_390_TLS_IE64:
2664 if (info->shared)
2665 {
2666 Elf_Internal_Rela outrel;
2667 asection *sreloc;
2668 bfd_byte *loc;
2669
2670 outrel.r_offset = rel->r_offset
2671 + input_section->output_section->vma
2672 + input_section->output_offset;
2673 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2674 sreloc = elf_section_data (input_section)->sreloc;
2675 if (sreloc == NULL)
2676 abort ();
2677 loc = sreloc->contents;
2678 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2679 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2680 }
ae9a127f 2681 /* Fall through. */
69fc87f1
MS		 2682
2683 case R_390_TLS_GD64:
2684 case R_390_TLS_GOTIE64:
2685 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2686 tls_type = GOT_UNKNOWN;
2687 if (h == NULL && local_got_offsets)
2688 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2689 else if (h != NULL)
2690 {
2691 tls_type = elf_s390_hash_entry(h)->tls_type;
2692 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2693 r_type = R_390_TLS_LE64;
2694 }
2695 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2696 r_type = R_390_TLS_IE64;
2697
2698 if (r_type == R_390_TLS_LE64)
2699 {
2700 /* This relocation gets optimized away by the local exec
2701 access optimization. */
2702 BFD_ASSERT (! unresolved_reloc);
2703 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2704 contents + rel->r_offset);
2705 continue;
2706 }
2707
2708 if (htab->sgot == NULL)
2709 abort ();
2710
2711 if (h != NULL)
2712 off = h->got.offset;
2713 else
2714 {
2715 if (local_got_offsets == NULL)
2716 abort ();
2717
2718 off = local_got_offsets[r_symndx];
2719 }
2720
2721 emit_tls_relocs:
2722
2723 if ((off & 1) != 0)
2724 off &= ~1;
26e41594 2725 else
69fc87f1
MS		 2726 {
2727 Elf_Internal_Rela outrel;
2728 bfd_byte *loc;
2729 int dr_type, indx;
2730
2731 if (htab->srelgot == NULL)
2732 abort ();
2733
2734 outrel.r_offset = (htab->sgot->output_section->vma
2735 + htab->sgot->output_offset + off);
2736
2737 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2738 if (r_type == R_390_TLS_GD64)
2739 dr_type = R_390_TLS_DTPMOD;
2740 else
2741 dr_type = R_390_TLS_TPOFF;
2742 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2743 outrel.r_addend = relocation - dtpoff_base (info);
2744 else
2745 outrel.r_addend = 0;
2746 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2747 loc = htab->srelgot->contents;
2748 loc += htab->srelgot->reloc_count++
2749 * sizeof (Elf64_External_Rela);
2750 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2751
2752 if (r_type == R_390_TLS_GD64)
2753 {
2754 if (indx == 0)
2755 {
2756 BFD_ASSERT (! unresolved_reloc);
2757 bfd_put_64 (output_bfd,
2758 relocation - dtpoff_base (info),
2759 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2760 }
2761 else
2762 {
2763 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2764 outrel.r_offset += GOT_ENTRY_SIZE;
2765 outrel.r_addend = 0;
2766 htab->srelgot->reloc_count++;
2767 loc += sizeof (Elf64_External_Rela);
2768 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2769 }
2770 }
2771
2772 if (h != NULL)
2773 h->got.offset |= 1;
2774 else
2775 local_got_offsets[r_symndx] |= 1;
2776 }
2777
2778 if (off >= (bfd_vma) -2)
2779 abort ();
2780 if (r_type == ELF64_R_TYPE (rel->r_info))
2781 {
2782 relocation = htab->sgot->output_offset + off;
2783 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2784 relocation += htab->sgot->output_section->vma;
2785 unresolved_reloc = FALSE;
2786 }
2787 else
2788 {
2789 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2790 contents + rel->r_offset);
2791 continue;
2792 }
2793 break;
2794
2795 case R_390_TLS_GOTIE12:
bd1ea41b 2796 case R_390_TLS_GOTIE20:
69fc87f1
MS		 2797 case R_390_TLS_IEENT:
2798 if (h == NULL)
2799 {
2800 if (local_got_offsets == NULL)
2801 abort();
2802 off = local_got_offsets[r_symndx];
2803 if (info->shared)
2804 goto emit_tls_relocs;
2805 }
2806 else
2807 {
2808 off = h->got.offset;
2809 tls_type = elf_s390_hash_entry(h)->tls_type;
2810 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2811 goto emit_tls_relocs;
2812 }
2813
2814 if (htab->sgot == NULL)
2815 abort ();
2816
2817 BFD_ASSERT (! unresolved_reloc);
2818 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2819 htab->sgot->contents + off);
2820 relocation = htab->sgot->output_offset + off;
2821 if (r_type == R_390_TLS_IEENT)
2822 relocation += htab->sgot->output_section->vma;
2823 unresolved_reloc = FALSE;
2824 break;
2825
2826 case R_390_TLS_LDM64:
2827 if (! info->shared)
2828 /* The literal pool entry this relocation refers to gets ignored
2829 by the optimized code of the local exec model. Do nothing
2830 and the value will turn out zero. */
2831 continue;
2832
2833 if (htab->sgot == NULL)
2834 abort ();
2835
2836 off = htab->tls_ldm_got.offset;
2837 if (off & 1)
2838 off &= ~1;
2839 else
2840 {
2841 Elf_Internal_Rela outrel;
2842 bfd_byte *loc;
2843
2844 if (htab->srelgot == NULL)
2845 abort ();
2846
2847 outrel.r_offset = (htab->sgot->output_section->vma
2848 + htab->sgot->output_offset + off);
2849
2850 bfd_put_64 (output_bfd, 0,
2851 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2852 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2853 outrel.r_addend = 0;
2854 loc = htab->srelgot->contents;
2855 loc += htab->srelgot->reloc_count++
2856 * sizeof (Elf64_External_Rela);
2857 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2858 htab->tls_ldm_got.offset |= 1;
2859 }
2860 relocation = htab->sgot->output_offset + off;
26e41594 2861 unresolved_reloc = FALSE;
69fc87f1
MS		 2862 break;
2863
2864 case R_390_TLS_LE64:
2865 if (info->shared)
2866 {
2867 /* Linking a shared library with non-fpic code requires
2868 a R_390_TLS_TPOFF relocation. */
2869 Elf_Internal_Rela outrel;
2870 asection *sreloc;
2871 bfd_byte *loc;
2872 int indx;
2873
2874 outrel.r_offset = rel->r_offset
2875 + input_section->output_section->vma
2876 + input_section->output_offset;
2877 if (h != NULL && h->dynindx != -1)
2878 indx = h->dynindx;
2879 else
2880 indx = 0;
2881 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2882 if (indx == 0)
2883 outrel.r_addend = relocation - dtpoff_base (info);
2884 else
2885 outrel.r_addend = 0;
2886 sreloc = elf_section_data (input_section)->sreloc;
2887 if (sreloc == NULL)
2888 abort ();
2889 loc = sreloc->contents;
2890 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2891 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2892 }
2893 else
2894 {
2895 BFD_ASSERT (! unresolved_reloc);
2896 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2897 contents + rel->r_offset);
2898 }
2899 continue;
2900
2901 case R_390_TLS_LDO64:
36c10a8f 2902 if (info->shared)
69fc87f1
MS		 2903 relocation -= dtpoff_base (info);
2904 else
2905 /* When converting LDO to LE, we must negate. */
2906 relocation = -tpoff (info, relocation);
2907 break;
2908
2909 /* Relocations for tls instructions. */
2910 case R_390_TLS_LOAD:
2911 case R_390_TLS_GDCALL:
2912 case R_390_TLS_LDCALL:
2913 tls_type = GOT_UNKNOWN;
2914 if (h == NULL && local_got_offsets)
2915 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2916 else if (h != NULL)
2917 tls_type = elf_s390_hash_entry(h)->tls_type;
2918
2919 if (tls_type == GOT_TLS_GD)
2920 continue;
2921
2922 if (r_type == R_390_TLS_LOAD)
2923 {
2924 if (!info->shared && (h == NULL || h->dynindx == -1))
2925 {
2926 /* IE->LE transition. Four valid cases:
2927 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2928 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2929 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2930 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2931 unsigned int insn0, insn1, ry;
2932
2933 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2934 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2935 if (insn1 != 0x0004)
2936 invalid_tls_insn (input_bfd, input_section, rel);
2937 ry = 0;
2938 if ((insn0 & 0xff00f000) == 0xe3000000)
2939 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2940 ry = (insn0 & 0x000f0000);
2941 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2942 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2943 ry = (insn0 & 0x0000f000) << 4;
2944 else if ((insn0 & 0xff00f000) == 0xe300c000)
2945 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2946 ry = (insn0 & 0x000f0000);
2947 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2948 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2949 ry = (insn0 & 0x0000f000) << 4;
2950 else
2951 invalid_tls_insn (input_bfd, input_section, rel);
2952 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2953 insn1 = 0x000d;
2954 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2955 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2956 }
2957 }
2958 else if (r_type == R_390_TLS_GDCALL)
2959 {
2960 unsigned int insn0, insn1;
2961
2962 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2963 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2964 if ((insn0 & 0xffff0000) != 0xc0e50000)
2965 invalid_tls_insn (input_bfd, input_section, rel);
2966 if (!info->shared && (h == NULL || h->dynindx == -1))
2967 {
2968 /* GD->LE transition.
2969 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2970 insn0 = 0xc0040000;
2971 insn1 = 0x0000;
2972 }
2973 else
2974 {
2975 /* GD->IE transition.
2976 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2977 insn0 = 0xe322c000;
2978 insn1 = 0x0004;
2979 }
2980 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2981 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2982 }
2983 else if (r_type == R_390_TLS_LDCALL)
2984 {
2985 if (!info->shared)
2986 {
2987 unsigned int insn0, insn1;
2988
2989 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2990 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2991 if ((insn0 & 0xffff0000) != 0xc0e50000)
2992 invalid_tls_insn (input_bfd, input_section, rel);
2993 /* LD->LE transition.
2994 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2995 insn0 = 0xc0040000;
2996 insn1 = 0x0000;
2997 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2998 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2999 }
3000 }
3001 continue;
3002
947216bf
AM		 3003 default:
3004 break;
3005 }
a85d7ed0 3006
239e1f3a
AM		 3007 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3008 because such sections are not SEC_ALLOC and thus ld.so will
3009 not process them. */
0451c93c 3010 if (unresolved_reloc
239e1f3a 3011 && !((input_section->flags & SEC_DEBUGGING) != 0
f5385ebf 3012 && h->def_dynamic))
0451c93c 3013 (*_bfd_error_handler)
843fe662 3014 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3015 input_bfd,
3016 input_section,
0451c93c 3017 (long) rel->r_offset,
843fe662 3018 howto->name,
0451c93c
MS		 3019 h->root.root.string);
3020
bd1ea41b
MS		 3021 if (r_type == R_390_20
3022 || r_type == R_390_GOT20
3023 || r_type == R_390_GOTPLT20
3024 || r_type == R_390_TLS_GOTIE20)
3025 {
3026 relocation += rel->r_addend;
3027 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3028 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3029 contents, rel->r_offset,
3030 relocation, 0);
3031 }
3032 else
3033 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
a85d7ed0
NC		 3034 contents, rel->r_offset,
3035 relocation, rel->r_addend);
3036
3037 if (r != bfd_reloc_ok)
3038 {
0451c93c 3039 const char *name;
ec338859 3040
0451c93c
MS		 3041 if (h != NULL)
3042 name = h->root.root.string;
3043 else
a85d7ed0 3044 {
0451c93c
MS		 3045 name = bfd_elf_string_from_elf_section (input_bfd,
3046 symtab_hdr->sh_link,
3047 sym->st_name);
3048 if (name == NULL)
b34976b6 3049 return FALSE;
0451c93c
MS		 3050 if (*name == '\0')
3051 name = bfd_section_name (input_bfd, sec);
3052 }
ec338859 3053
0451c93c
MS		 3054 if (r == bfd_reloc_overflow)
3055 {
ec338859 3056
0451c93c 3057 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 3058 (info, (h ? &h->root : NULL), name, howto->name,
3059 (bfd_vma) 0, input_bfd, input_section,
3060 rel->r_offset)))
b34976b6 3061 return FALSE;
0451c93c
MS		 3062 }
3063 else
3064 {
3065 (*_bfd_error_handler)
d003868e
AM		 3066 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3067 input_bfd, input_section,
0451c93c 3068 (long) rel->r_offset, name, (int) r);
b34976b6 3069 return FALSE;
a85d7ed0
NC		 3070 }
3071 }
3072 }
3073
b34976b6 3074 return TRUE;
a85d7ed0
NC		 3075}
3076
3077/* Finish up dynamic symbol handling. We set the contents of various
3078 dynamic sections here. */
3079
b34976b6 3080static bfd_boolean
a85d7ed0
NC		 3081elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3082 bfd *output_bfd;
3083 struct bfd_link_info *info;
3084 struct elf_link_hash_entry *h;
3085 Elf_Internal_Sym *sym;
3086{
0451c93c 3087 struct elf_s390_link_hash_table *htab;
a85d7ed0 3088
0451c93c 3089 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 3090
3091 if (h->plt.offset != (bfd_vma) -1)
3092 {
a85d7ed0 3093 bfd_vma plt_index;
0451c93c
MS		 3094 bfd_vma got_offset;
3095 Elf_Internal_Rela rela;
947216bf 3096 bfd_byte *loc;
a85d7ed0
NC		 3097
3098 /* This symbol has an entry in the procedure linkage table. Set
947216bf 3099 it up. */
a85d7ed0 3100
0451c93c
MS		 3101 if (h->dynindx == -1
3102 || htab->splt == NULL
3103 || htab->sgotplt == NULL
3104 || htab->srelplt == NULL)
3105 abort ();
a85d7ed0 3106
99c79b2e 3107 /* Calc. index no.
947216bf 3108 Current offset - size first entry / entry size. */
a85d7ed0
NC		 3109 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3110
3111 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
947216bf 3112 addr & GOT addr. */
a85d7ed0
NC		 3113 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3114
3115 /* Fill in the blueprint of a PLT. */
0451c93c
MS		 3116 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3117 htab->splt->contents + h->plt.offset);
3118 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3119 htab->splt->contents + h->plt.offset + 4);
3120 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3121 htab->splt->contents + h->plt.offset + 8);
3122 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3123 htab->splt->contents + h->plt.offset + 12);
3124 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3125 htab->splt->contents + h->plt.offset + 16);
3126 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3127 htab->splt->contents + h->plt.offset + 20);
3128 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3129 htab->splt->contents + h->plt.offset + 24);
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3131 htab->splt->contents + h->plt.offset + 28);
a85d7ed0
NC		 3132 /* Fixup the relative address to the GOT entry */
3133 bfd_put_32 (output_bfd,
0451c93c
MS		 3134 (htab->sgotplt->output_section->vma +
3135 htab->sgotplt->output_offset + got_offset
3136 - (htab->splt->output_section->vma + h->plt.offset))/2,
3137 htab->splt->contents + h->plt.offset + 2);
a85d7ed0
NC		 3138 /* Fixup the relative branch to PLT 0 */
3139 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3140 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
0451c93c 3141 htab->splt->contents + h->plt.offset + 24);
a85d7ed0
NC		 3142 /* Fixup offset into symbol table */
3143 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
0451c93c 3144 htab->splt->contents + h->plt.offset + 28);
a85d7ed0
NC		 3145
3146 /* Fill in the entry in the global offset table.
947216bf 3147 Points to instruction after GOT offset. */
a85d7ed0 3148 bfd_put_64 (output_bfd,
0451c93c
MS		 3149 (htab->splt->output_section->vma
3150 + htab->splt->output_offset
a85d7ed0
NC		 3151 + h->plt.offset
3152 + 14),
0451c93c 3153 htab->sgotplt->contents + got_offset);
a85d7ed0 3154
0451c93c
MS		 3155 /* Fill in the entry in the .rela.plt section. */
3156 rela.r_offset = (htab->sgotplt->output_section->vma
3157 + htab->sgotplt->output_offset
3158 + got_offset);
3159 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3160 rela.r_addend = 0;
947216bf 3161 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
0451c93c 3162 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0 3163
f5385ebf 3164 if (!h->def_regular)
a85d7ed0
NC		 3165 {
3166 /* Mark the symbol as undefined, rather than as defined in
0451c93c
MS		 3167 the .plt section. Leave the value alone. This is a clue
3168 for the dynamic linker, to make function pointer
3169 comparisons work between an application and shared
3170 library. */
a85d7ed0
NC		 3171 sym->st_shndx = SHN_UNDEF;
3172 }
3173 }
3174
69fc87f1
MS		 3175 if (h->got.offset != (bfd_vma) -1
3176 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3177 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3178 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
a85d7ed0 3179 {
a85d7ed0 3180 Elf_Internal_Rela rela;
947216bf 3181 bfd_byte *loc;
a85d7ed0
NC		 3182
3183 /* This symbol has an entry in the global offset table. Set it
947216bf 3184 up. */
0451c93c
MS		 3185 if (htab->sgot == NULL || htab->srelgot == NULL)
3186 abort ();
a85d7ed0 3187
0451c93c
MS		 3188 rela.r_offset = (htab->sgot->output_section->vma
3189 + htab->sgot->output_offset
dc810e39 3190 + (h->got.offset &~ (bfd_vma) 1));
a85d7ed0
NC		 3191
3192 /* If this is a static link, or it is a -Bsymbolic link and the
3193 symbol is defined locally or was forced to be local because
3194 of a version file, we just want to emit a RELATIVE reloc.
3195 The entry in the global offset table will already have been
3196 initialized in the relocate_section function. */
0451c93c
MS		 3197 if (info->shared
3198 && (info->symbolic
3199 || h->dynindx == -1
f5385ebf
AM		 3200 || h->forced_local)
3201 && h->def_regular)
947216bf 3202 {
0451c93c 3203 BFD_ASSERT((h->got.offset & 1) != 0);
947216bf
AM		 3204 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3205 rela.r_addend = (h->root.u.def.value
3206 + h->root.u.def.section->output_section->vma
3207 + h->root.u.def.section->output_offset);
3208 }
a85d7ed0
NC		 3209 else
3210 {
3211 BFD_ASSERT((h->got.offset & 1) == 0);
0451c93c 3212 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
a85d7ed0 3213 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
947216bf
AM		 3214 rela.r_addend = 0;
3215 }
a85d7ed0 3216
947216bf
AM		 3217 loc = htab->srelgot->contents;
3218 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3219 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3220 }
3221
f5385ebf 3222 if (h->needs_copy)
a85d7ed0 3223 {
a85d7ed0 3224 Elf_Internal_Rela rela;
947216bf 3225 bfd_byte *loc;
a85d7ed0
NC		 3226
3227 /* This symbols needs a copy reloc. Set it up. */
3228
0451c93c
MS		 3229 if (h->dynindx == -1
3230 || (h->root.type != bfd_link_hash_defined
3231 && h->root.type != bfd_link_hash_defweak)
3232 || htab->srelbss == NULL)
3233 abort ();
a85d7ed0
NC		 3234
3235 rela.r_offset = (h->root.u.def.value
3236 + h->root.u.def.section->output_section->vma
3237 + h->root.u.def.section->output_offset);
3238 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3239 rela.r_addend = 0;
947216bf
AM		 3240 loc = htab->srelbss->contents;
3241 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3242 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3243 }
3244
3245 /* Mark some specially defined symbols as absolute. */
3246 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
22edb2f1
RS		 3247 || h == htab->elf.hgot
3248 || h == htab->elf.hplt)
a85d7ed0
NC		 3249 sym->st_shndx = SHN_ABS;
3250
b34976b6 3251 return TRUE;
a85d7ed0
NC		 3252}
3253
0451c93c
MS		 3254/* Used to decide how to sort relocs in an optimal manner for the
3255 dynamic linker, before writing them out. */
3256
3257static enum elf_reloc_type_class
3258elf_s390_reloc_type_class (rela)
3259 const Elf_Internal_Rela *rela;
3260{
3261 switch ((int) ELF64_R_TYPE (rela->r_info))
3262 {
3263 case R_390_RELATIVE:
3264 return reloc_class_relative;
3265 case R_390_JMP_SLOT:
3266 return reloc_class_plt;
3267 case R_390_COPY:
3268 return reloc_class_copy;
3269 default:
3270 return reloc_class_normal;
3271 }
3272}
3273
a85d7ed0
NC		 3274/* Finish up the dynamic sections. */
3275
b34976b6 3276static bfd_boolean
a85d7ed0
NC		 3277elf_s390_finish_dynamic_sections (output_bfd, info)
3278 bfd *output_bfd;
3279 struct bfd_link_info *info;
3280{
0451c93c 3281 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 3282 bfd *dynobj;
3283 asection *sdyn;
a85d7ed0 3284
0451c93c
MS		 3285 htab = elf_s390_hash_table (info);
3286 dynobj = htab->elf.dynobj;
a85d7ed0
NC		 3287 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3288
0451c93c 3289 if (htab->elf.dynamic_sections_created)
a85d7ed0 3290 {
a85d7ed0
NC		 3291 Elf64_External_Dyn *dyncon, *dynconend;
3292
0451c93c
MS		 3293 if (sdyn == NULL || htab->sgot == NULL)
3294 abort ();
a85d7ed0
NC		 3295
3296 dyncon = (Elf64_External_Dyn *) sdyn->contents;
eea6121a 3297 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
a85d7ed0
NC		 3298 for (; dyncon < dynconend; dyncon++)
3299 {
3300 Elf_Internal_Dyn dyn;
a85d7ed0 3301 asection *s;
ec338859 3302
a85d7ed0 3303 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
ec338859 3304
a85d7ed0
NC		 3305 switch (dyn.d_tag)
3306 {
3307 default:
0451c93c 3308 continue;
ec338859 3309
a85d7ed0 3310 case DT_PLTGOT:
0451c93c
MS		 3311 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3312 break;
ec338859 3313
a85d7ed0 3314 case DT_JMPREL:
0451c93c 3315 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
a85d7ed0 3316 break;
ec338859 3317
a85d7ed0 3318 case DT_PLTRELSZ:
0451c93c 3319 s = htab->srelplt->output_section;
eea6121a 3320 dyn.d_un.d_val = s->size;
a85d7ed0 3321 break;
ec338859 3322
a85d7ed0
NC		 3323 case DT_RELASZ:
3324 /* The procedure linkage table relocs (DT_JMPREL) should
3325 not be included in the overall relocs (DT_RELA).
3326 Therefore, we override the DT_RELASZ entry here to
3327 make it not include the JMPREL relocs. Since the
3328 linker script arranges for .rela.plt to follow all
3329 other relocation sections, we don't have to worry
3330 about changing the DT_RELA entry. */
0451c93c 3331 s = htab->srelplt->output_section;
eea6121a 3332 dyn.d_un.d_val -= s->size;
a85d7ed0
NC		 3333 break;
3334 }
0451c93c
MS		 3335
3336 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
a85d7ed0
NC		 3337 }
3338
3339 /* Fill in the special first entry in the procedure linkage table. */
eea6121a 3340 if (htab->splt && htab->splt->size > 0)
a85d7ed0
NC		 3341 {
3342 /* fill in blueprint for plt 0 entry */
0451c93c
MS		 3343 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3344 htab->splt->contents );
3345 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3346 htab->splt->contents +4 );
3347 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3348 htab->splt->contents +12 );
3349 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3350 htab->splt->contents +16 );
3351 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3352 htab->splt->contents +20 );
3353 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3354 htab->splt->contents + 24);
3355 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3356 htab->splt->contents + 28 );
a85d7ed0
NC		 3357 /* Fixup relative address to start of GOT */
3358 bfd_put_32 (output_bfd,
0451c93c
MS		 3359 (htab->sgotplt->output_section->vma +
3360 htab->sgotplt->output_offset
3361 - htab->splt->output_section->vma - 6)/2,
3362 htab->splt->contents + 8);
a85d7ed0 3363 }
0451c93c
MS		 3364 elf_section_data (htab->splt->output_section)
3365 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
a85d7ed0
NC		 3366 }
3367
0451c93c 3368 if (htab->sgotplt)
a85d7ed0 3369 {
0451c93c 3370 /* Fill in the first three entries in the global offset table. */
eea6121a 3371 if (htab->sgotplt->size > 0)
0451c93c
MS		 3372 {
3373 bfd_put_64 (output_bfd,
3374 (sdyn == NULL ? (bfd_vma) 0
3375 : sdyn->output_section->vma + sdyn->output_offset),
3376 htab->sgotplt->contents);
3377 /* One entry for shared object struct ptr. */
3378 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3379 /* One entry for _dl_runtime_resolve. */
3380 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3381 }
a85d7ed0 3382
0451c93c
MS		 3383 elf_section_data (htab->sgot->output_section)
3384 ->this_hdr.sh_entsize = 8;
3385 }
b34976b6 3386 return TRUE;
a85d7ed0
NC		 3387}
3388
4c45e5c9
JJ		 3389/* Return address for Ith PLT stub in section PLT, for relocation REL
3390 or (bfd_vma) -1 if it should not be included. */
3391
3392static bfd_vma
3393elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3394 const arelent *rel ATTRIBUTE_UNUSED)
3395{
3396 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3397}
3398
3399
ae9a127f
NC		 3400/* Why was the hash table entry size definition changed from
3401 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3402 this is the only reason for the s390_elf64_size_info structure. */
a85d7ed0
NC		 3403
3404const struct elf_size_info s390_elf64_size_info =
3405{
3406 sizeof (Elf64_External_Ehdr),
3407 sizeof (Elf64_External_Phdr),
3408 sizeof (Elf64_External_Shdr),
3409 sizeof (Elf64_External_Rel),
3410 sizeof (Elf64_External_Rela),
3411 sizeof (Elf64_External_Sym),
3412 sizeof (Elf64_External_Dyn),
3413 sizeof (Elf_External_Note),
ae9a127f
NC		 3414 8, /* hash-table entry size. */
3415 1, /* internal relocations per external relocations. */
3416 64, /* arch_size. */
45d6a902 3417 3, /* log_file_align. */
a85d7ed0
NC		 3418 ELFCLASS64, EV_CURRENT,
3419 bfd_elf64_write_out_phdrs,
3420 bfd_elf64_write_shdrs_and_ehdr,
1489a3a0 3421 bfd_elf64_checksum_contents,
a85d7ed0 3422 bfd_elf64_write_relocs,
73ff0d56 3423 bfd_elf64_swap_symbol_in,
a85d7ed0
NC		 3424 bfd_elf64_swap_symbol_out,
3425 bfd_elf64_slurp_reloc_table,
3426 bfd_elf64_slurp_symbol_table,
3427 bfd_elf64_swap_dyn_in,
3428 bfd_elf64_swap_dyn_out,
947216bf
AM		 3429 bfd_elf64_swap_reloc_in,
3430 bfd_elf64_swap_reloc_out,
3431 bfd_elf64_swap_reloca_in,
3432 bfd_elf64_swap_reloca_out
a85d7ed0
NC		 3433};
3434
3435#define TARGET_BIG_SYM bfd_elf64_s390_vec
3436#define TARGET_BIG_NAME "elf64-s390"
3437#define ELF_ARCH bfd_arch_s390
3438#define ELF_MACHINE_CODE EM_S390
3439#define ELF_MACHINE_ALT1 EM_S390_OLD
3440#define ELF_MAXPAGESIZE 0x1000
3441
3442#define elf_backend_size_info s390_elf64_size_info
3443
3444#define elf_backend_can_gc_sections 1
51b64d56 3445#define elf_backend_can_refcount 1
a85d7ed0
NC		 3446#define elf_backend_want_got_plt 1
3447#define elf_backend_plt_readonly 1
3448#define elf_backend_want_plt_sym 0
3449#define elf_backend_got_header_size 24
b491616a 3450#define elf_backend_rela_normal 1
a85d7ed0
NC		 3451
3452#define elf_info_to_howto elf_s390_info_to_howto
3453
a85d7ed0
NC		 3454#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3455#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3456#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
157090f7 3457#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
a85d7ed0
NC		 3458
3459#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3460#define elf_backend_check_relocs elf_s390_check_relocs
0451c93c
MS		 3461#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3462#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
a85d7ed0
NC		 3463#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3464#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3465#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3466#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
0451c93c 3467#define elf_backend_reloc_type_class elf_s390_reloc_type_class
a85d7ed0
NC		 3468#define elf_backend_relocate_section elf_s390_relocate_section
3469#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
74541ad4 3470#define elf_backend_init_index_section _bfd_elf_init_1_index_section
29c2fb7c 3471#define elf_backend_reloc_type_class elf_s390_reloc_type_class
4c45e5c9 3472#define elf_backend_plt_sym_val elf_s390_plt_sym_val
a85d7ed0 3473
69fc87f1
MS		 3474#define bfd_elf64_mkobject elf_s390_mkobject
3475#define elf_backend_object_p elf_s390_object_p
a85d7ed0
NC		 3476
3477#include "elf64-target.h"
GDB Binutils - Deliverables
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