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* objdump.c (dump_reloc_set): Append "()" to symbol names which
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
CommitLineData
a85d7ed0 1/* IBM S/390-specific support for 64-bit ELF
0ffa91dd 2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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
0ffa91dd
NC		 632/* NOTE: Keep this structure in sync with
633 the one declared in elf32-s390.c. */
69fc87f1
MS		 634struct elf_s390_obj_tdata
635{
636 struct elf_obj_tdata root;
637
0ffa91dd 638 /* TLS type for each local got entry. */
69fc87f1
MS		 639 char *local_got_tls_type;
640};
641
642#define elf_s390_tdata(abfd) \
643 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
644
645#define elf_s390_local_got_tls_type(abfd) \
646 (elf_s390_tdata (abfd)->local_got_tls_type)
647
0ffa91dd
NC		 648#define is_s390_elf(bfd) \
649 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
650 && elf_tdata (bfd) != NULL \
651 && elf_object_id (bfd) == S390_ELF_TDATA)
652
69fc87f1 653static bfd_boolean
62d7a5f6 654elf_s390_mkobject (bfd *abfd)
69fc87f1 655{
0ffa91dd
NC		 656 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
657 S390_ELF_TDATA);
69fc87f1
MS		 658}
659
660static bfd_boolean
661elf_s390_object_p (abfd)
662 bfd *abfd;
663{
69fc87f1
MS		 664 /* Set the right machine number for an s390 elf32 file. */
665 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
666}
667
a85d7ed0
NC		 668/* s390 ELF linker hash table. */
669
670struct elf_s390_link_hash_table
671{
0451c93c 672 struct elf_link_hash_table elf;
a85d7ed0 673
0451c93c
MS		 674 /* Short-cuts to get to dynamic linker sections. */
675 asection *sgot;
676 asection *sgotplt;
677 asection *srelgot;
678 asection *splt;
679 asection *srelplt;
680 asection *sdynbss;
681 asection *srelbss;
ec338859 682
69fc87f1
MS		 683 union {
684 bfd_signed_vma refcount;
685 bfd_vma offset;
686 } tls_ldm_got;
687
ec338859
AM		 688 /* Small local sym to section mapping cache. */
689 struct sym_sec_cache sym_sec;
0451c93c 690};
a85d7ed0
NC		 691
692/* Get the s390 ELF linker hash table from a link_info structure. */
693
694#define elf_s390_hash_table(p) \
695 ((struct elf_s390_link_hash_table *) ((p)->hash))
696
697/* Create an entry in an s390 ELF linker hash table. */
698
699static struct bfd_hash_entry *
0451c93c 700link_hash_newfunc (entry, table, string)
a85d7ed0
NC		 701 struct bfd_hash_entry *entry;
702 struct bfd_hash_table *table;
703 const char *string;
704{
a85d7ed0
NC		 705 /* Allocate the structure if it has not already been allocated by a
706 subclass. */
0451c93c
MS		 707 if (entry == NULL)
708 {
709 entry = bfd_hash_allocate (table,
710 sizeof (struct elf_s390_link_hash_entry));
711 if (entry == NULL)
712 return entry;
713 }
a85d7ed0
NC		 714
715 /* Call the allocation method of the superclass. */
0451c93c
MS		 716 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
717 if (entry != NULL)
a85d7ed0 718 {
0451c93c
MS		 719 struct elf_s390_link_hash_entry *eh;
720
721 eh = (struct elf_s390_link_hash_entry *) entry;
722 eh->dyn_relocs = NULL;
5236c819 723 eh->gotplt_refcount = 0;
69fc87f1 724 eh->tls_type = GOT_UNKNOWN;
a85d7ed0
NC		 725 }
726
0451c93c 727 return entry;
a85d7ed0
NC		 728}
729
730/* Create an s390 ELF linker hash table. */
731
732static struct bfd_link_hash_table *
733elf_s390_link_hash_table_create (abfd)
734 bfd *abfd;
735{
736 struct elf_s390_link_hash_table *ret;
dc810e39 737 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
a85d7ed0 738
e2d34d7d 739 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
0451c93c 740 if (ret == NULL)
a85d7ed0
NC		 741 return NULL;
742
66eb6687
AM		 743 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
744 sizeof (struct elf_s390_link_hash_entry)))
a85d7ed0 745 {
e2d34d7d 746 free (ret);
a85d7ed0
NC		 747 return NULL;
748 }
749
0451c93c
MS		 750 ret->sgot = NULL;
751 ret->sgotplt = NULL;
752 ret->srelgot = NULL;
753 ret->splt = NULL;
754 ret->srelplt = NULL;
755 ret->sdynbss = NULL;
756 ret->srelbss = NULL;
69fc87f1 757 ret->tls_ldm_got.refcount = 0;
ec338859 758 ret->sym_sec.abfd = NULL;
0451c93c
MS		 759
760 return &ret->elf.root;
761}
762
763/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
764 shortcuts to them in our hash table. */
765
b34976b6 766static bfd_boolean
0451c93c
MS		 767create_got_section (dynobj, info)
768 bfd *dynobj;
769 struct bfd_link_info *info;
770{
771 struct elf_s390_link_hash_table *htab;
772
773 if (! _bfd_elf_create_got_section (dynobj, info))
b34976b6 774 return FALSE;
0451c93c
MS		 775
776 htab = elf_s390_hash_table (info);
777 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
778 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
779 if (!htab->sgot || !htab->sgotplt)
780 abort ();
781
3496cb2a
L		 782 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
783 (SEC_ALLOC | SEC_LOAD
784 | SEC_HAS_CONTENTS
785 | SEC_IN_MEMORY
786 | SEC_LINKER_CREATED
787 | SEC_READONLY));
0451c93c 788 if (htab->srelgot == NULL
99881371 789 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
b34976b6
AM		 790 return FALSE;
791 return TRUE;
0451c93c
MS		 792}
793
794/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
795 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
796 hash table. */
797
b34976b6 798static bfd_boolean
0451c93c
MS		 799elf_s390_create_dynamic_sections (dynobj, info)
800 bfd *dynobj;
801 struct bfd_link_info *info;
802{
803 struct elf_s390_link_hash_table *htab;
804
805 htab = elf_s390_hash_table (info);
806 if (!htab->sgot && !create_got_section (dynobj, info))
b34976b6 807 return FALSE;
0451c93c
MS		 808
809 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 810 return FALSE;
0451c93c
MS		 811
812 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
813 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
814 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
815 if (!info->shared)
816 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
817
818 if (!htab->splt || !htab->srelplt || !htab->sdynbss
819 || (!info->shared && !htab->srelbss))
820 abort ();
821
b34976b6 822 return TRUE;
a85d7ed0
NC		 823}
824
0451c93c
MS		 825/* Copy the extra info we tack onto an elf_link_hash_entry. */
826
827static void
fcfa13d2
AM		 828elf_s390_copy_indirect_symbol (info, dir, ind)
829 struct bfd_link_info *info;
0451c93c
MS		 830 struct elf_link_hash_entry *dir, *ind;
831{
832 struct elf_s390_link_hash_entry *edir, *eind;
833
834 edir = (struct elf_s390_link_hash_entry *) dir;
835 eind = (struct elf_s390_link_hash_entry *) ind;
836
837 if (eind->dyn_relocs != NULL)
838 {
839 if (edir->dyn_relocs != NULL)
840 {
841 struct elf_s390_dyn_relocs **pp;
842 struct elf_s390_dyn_relocs *p;
843
fcfa13d2 844 /* Add reloc counts against the indirect sym to the direct sym
0451c93c
MS		 845 list. Merge any entries against the same section. */
846 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
847 {
848 struct elf_s390_dyn_relocs *q;
849
850 for (q = edir->dyn_relocs; q != NULL; q = q->next)
851 if (q->sec == p->sec)
852 {
853 q->pc_count += p->pc_count;
854 q->count += p->count;
855 *pp = p->next;
856 break;
857 }
858 if (q == NULL)
859 pp = &p->next;
860 }
861 *pp = edir->dyn_relocs;
862 }
863
864 edir->dyn_relocs = eind->dyn_relocs;
865 eind->dyn_relocs = NULL;
866 }
867
69fc87f1
MS		 868 if (ind->root.type == bfd_link_hash_indirect
869 && dir->got.refcount <= 0)
870 {
871 edir->tls_type = eind->tls_type;
872 eind->tls_type = GOT_UNKNOWN;
873 }
874
64285810
MS		 875 if (ELIMINATE_COPY_RELOCS
876 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 877 && dir->dynamic_adjusted)
878 {
879 /* If called to transfer flags for a weakdef during processing
880 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
881 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
882 dir->ref_dynamic |= ind->ref_dynamic;
883 dir->ref_regular |= ind->ref_regular;
884 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
885 dir->needs_plt |= ind->needs_plt;
886 }
64285810 887 else
fcfa13d2 888 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
0451c93c 889}
a85d7ed0 890
69fc87f1
MS		 891static int
892elf_s390_tls_transition (info, r_type, is_local)
893 struct bfd_link_info *info;
894 int r_type;
895 int is_local;
896{
897 if (info->shared)
898 return r_type;
899
900 switch (r_type)
901 {
902 case R_390_TLS_GD64:
903 case R_390_TLS_IE64:
904 if (is_local)
905 return R_390_TLS_LE64;
906 return R_390_TLS_IE64;
907 case R_390_TLS_GOTIE64:
908 if (is_local)
909 return R_390_TLS_LE64;
910 return R_390_TLS_GOTIE64;
911 case R_390_TLS_LDM64:
912 return R_390_TLS_LE64;
913 }
914
915 return r_type;
916}
917
a85d7ed0
NC		 918/* Look through the relocs for a section during the first phase, and
919 allocate space in the global offset table or procedure linkage
920 table. */
921
b34976b6 922static bfd_boolean
a85d7ed0
NC		 923elf_s390_check_relocs (abfd, info, sec, relocs)
924 bfd *abfd;
925 struct bfd_link_info *info;
926 asection *sec;
927 const Elf_Internal_Rela *relocs;
928{
0451c93c 929 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 930 Elf_Internal_Shdr *symtab_hdr;
931 struct elf_link_hash_entry **sym_hashes;
a85d7ed0
NC		 932 const Elf_Internal_Rela *rel;
933 const Elf_Internal_Rela *rel_end;
a85d7ed0 934 asection *sreloc;
5236c819 935 bfd_signed_vma *local_got_refcounts;
69fc87f1 936 int tls_type, old_tls_type;
a85d7ed0 937
1049f94e 938 if (info->relocatable)
b34976b6 939 return TRUE;
a85d7ed0 940
0ffa91dd
NC		 941 BFD_ASSERT (is_s390_elf (abfd));
942
0451c93c 943 htab = elf_s390_hash_table (info);
0ffa91dd 944 symtab_hdr = &elf_symtab_hdr (abfd);
a85d7ed0 945 sym_hashes = elf_sym_hashes (abfd);
5236c819 946 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0 947
a85d7ed0
NC		 948 sreloc = NULL;
949
950 rel_end = relocs + sec->reloc_count;
951 for (rel = relocs; rel < rel_end; rel++)
952 {
69fc87f1 953 unsigned int r_type;
a85d7ed0
NC		 954 unsigned long r_symndx;
955 struct elf_link_hash_entry *h;
956
957 r_symndx = ELF64_R_SYM (rel->r_info);
958
0451c93c
MS		 959 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
960 {
d003868e
AM		 961 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
962 abfd,
0451c93c 963 r_symndx);
b34976b6 964 return FALSE;
0451c93c
MS		 965 }
966
a85d7ed0
NC		 967 if (r_symndx < symtab_hdr->sh_info)
968 h = NULL;
969 else
973a3492
L		 970 {
971 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
972 while (h->root.type == bfd_link_hash_indirect
973 || h->root.type == bfd_link_hash_warning)
974 h = (struct elf_link_hash_entry *) h->root.u.i.link;
975 }
a85d7ed0 976
5236c819
MS		 977 /* Create got section and local_got_refcounts array if they
978 are needed. */
69fc87f1
MS		 979 r_type = elf_s390_tls_transition (info,
980 ELF64_R_TYPE (rel->r_info),
981 h == NULL);
982 switch (r_type)
a85d7ed0
NC		 983 {
984 case R_390_GOT12:
947216bf 985 case R_390_GOT16:
bd1ea41b 986 case R_390_GOT20:
a85d7ed0
NC		 987 case R_390_GOT32:
988 case R_390_GOT64:
989 case R_390_GOTENT:
5236c819
MS		 990 case R_390_GOTPLT12:
991 case R_390_GOTPLT16:
bd1ea41b 992 case R_390_GOTPLT20:
5236c819
MS		 993 case R_390_GOTPLT32:
994 case R_390_GOTPLT64:
995 case R_390_GOTPLTENT:
69fc87f1
MS		 996 case R_390_TLS_GD64:
997 case R_390_TLS_GOTIE12:
bd1ea41b 998 case R_390_TLS_GOTIE20:
69fc87f1
MS		 999 case R_390_TLS_GOTIE64:
1000 case R_390_TLS_IEENT:
1001 case R_390_TLS_IE64:
1002 case R_390_TLS_LDM64:
5236c819
MS		 1003 if (h == NULL
1004 && local_got_refcounts == NULL)
a85d7ed0 1005 {
5236c819 1006 bfd_size_type size;
0451c93c 1007
5236c819 1008 size = symtab_hdr->sh_info;
69fc87f1 1009 size *= (sizeof (bfd_signed_vma) + sizeof(char));
5236c819
MS		 1010 local_got_refcounts = ((bfd_signed_vma *)
1011 bfd_zalloc (abfd, size));
a85d7ed0 1012 if (local_got_refcounts == NULL)
5236c819
MS		 1013 return FALSE;
1014 elf_local_got_refcounts (abfd) = local_got_refcounts;
69fc87f1
MS		 1015 elf_s390_local_got_tls_type (abfd)
1016 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
a85d7ed0 1017 }
5236c819
MS		 1018 /* Fall through. */
1019 case R_390_GOTOFF16:
1020 case R_390_GOTOFF32:
1021 case R_390_GOTOFF64:
0451c93c
MS		 1022 case R_390_GOTPC:
1023 case R_390_GOTPCDBL:
1024 if (htab->sgot == NULL)
1025 {
1026 if (htab->elf.dynobj == NULL)
1027 htab->elf.dynobj = abfd;
1028 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 1029 return FALSE;
0451c93c 1030 }
5236c819
MS		 1031 }
1032
69fc87f1 1033 switch (r_type)
5236c819 1034 {
5236c819
MS		 1035 case R_390_GOTOFF16:
1036 case R_390_GOTOFF32:
1037 case R_390_GOTOFF64:
1038 case R_390_GOTPC:
1039 case R_390_GOTPCDBL:
1040 /* Got is created, nothing to be done. */
0451c93c 1041 break;
ec338859 1042
947216bf 1043 case R_390_PLT16DBL:
a85d7ed0
NC		 1044 case R_390_PLT32:
1045 case R_390_PLT32DBL:
1046 case R_390_PLT64:
5236c819
MS		 1047 case R_390_PLTOFF16:
1048 case R_390_PLTOFF32:
1049 case R_390_PLTOFF64:
a85d7ed0 1050 /* This symbol requires a procedure linkage table entry. We
947216bf
AM		 1051 actually build the entry in adjust_dynamic_symbol,
1052 because this might be a case of linking PIC code which is
1053 never referenced by a dynamic object, in which case we
1054 don't need to generate a procedure linkage table entry
1055 after all. */
ec338859 1056
a85d7ed0 1057 /* If this is a local symbol, we resolve it directly without
947216bf 1058 creating a procedure linkage table entry. */
5236c819
MS		 1059 if (h != NULL)
1060 {
f5385ebf 1061 h->needs_plt = 1;
5236c819
MS		 1062 h->plt.refcount += 1;
1063 }
1064 break;
ec338859 1065
5236c819
MS		 1066 case R_390_GOTPLT12:
1067 case R_390_GOTPLT16:
bd1ea41b 1068 case R_390_GOTPLT20:
5236c819
MS		 1069 case R_390_GOTPLT32:
1070 case R_390_GOTPLT64:
1071 case R_390_GOTPLTENT:
1072 /* This symbol requires either a procedure linkage table entry
1073 or an entry in the local got. We actually build the entry
1074 in adjust_dynamic_symbol because whether this is really a
1075 global reference can change and with it the fact if we have
1076 to create a plt entry or a local got entry. To be able to
1077 make a once global symbol a local one we have to keep track
1078 of the number of gotplt references that exist for this
1079 symbol. */
1080 if (h != NULL)
1081 {
1082 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
f5385ebf 1083 h->needs_plt = 1;
5236c819
MS		 1084 h->plt.refcount += 1;
1085 }
69fc87f1
MS		 1086 else
1087 local_got_refcounts[r_symndx] += 1;
1088 break;
1089
1090 case R_390_TLS_LDM64:
1091 htab->tls_ldm_got.refcount += 1;
1092 break;
1093
1094 case R_390_TLS_IE64:
1095 case R_390_TLS_GOTIE12:
bd1ea41b 1096 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1097 case R_390_TLS_GOTIE64:
1098 case R_390_TLS_IEENT:
1099 if (info->shared)
1100 info->flags |= DF_STATIC_TLS;
1101 /* Fall through */
1102
1103 case R_390_GOT12:
26e41594 1104 case R_390_GOT16:
bd1ea41b 1105 case R_390_GOT20:
69fc87f1
MS		 1106 case R_390_GOT32:
1107 case R_390_GOT64:
1108 case R_390_GOTENT:
1109 case R_390_TLS_GD64:
1110 /* This symbol requires a global offset table entry. */
1111 switch (r_type)
1112 {
1113 default:
1114 case R_390_GOT12:
1115 case R_390_GOT16:
bd1ea41b 1116 case R_390_GOT20:
69fc87f1
MS		 1117 case R_390_GOT32:
1118 case R_390_GOTENT:
1119 tls_type = GOT_NORMAL;
1120 break;
1121 case R_390_TLS_GD64:
1122 tls_type = GOT_TLS_GD;
1123 break;
1124 case R_390_TLS_IE64:
1125 case R_390_TLS_GOTIE64:
1126 tls_type = GOT_TLS_IE;
1127 break;
1128 case R_390_TLS_GOTIE12:
bd1ea41b 1129 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1130 case R_390_TLS_IEENT:
1131 tls_type = GOT_TLS_IE_NLT;
1132 break;
1133 }
1134
1135 if (h != NULL)
1136 {
1137 h->got.refcount += 1;
1138 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1139 }
5236c819
MS		 1140 else
1141 {
1142 local_got_refcounts[r_symndx] += 1;
69fc87f1 1143 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
5236c819 1144 }
69fc87f1
MS		 1145 /* If a TLS symbol is accessed using IE at least once,
1146 there is no point to use dynamic model for it. */
1147 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1148 {
1149 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1150 {
1151 (*_bfd_error_handler)
d003868e
AM		 1152 (_("%B: `%s' accessed both as normal and thread local symbol"),
1153 abfd, h->root.root.string);
69fc87f1
MS		 1154 return FALSE;
1155 }
1156 if (old_tls_type > tls_type)
1157 tls_type = old_tls_type;
1158 }
1159
1160 if (old_tls_type != tls_type)
1161 {
1162 if (h != NULL)
1163 elf_s390_hash_entry (h)->tls_type = tls_type;
1164 else
1165 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1166 }
1167
1168 if (r_type != R_390_TLS_IE64)
1169 break;
1170 /* Fall through */
1171
1172 case R_390_TLS_LE64:
1173 if (!info->shared)
1174 break;
1175 info->flags |= DF_STATIC_TLS;
1176 /* Fall through */
ec338859 1177
947216bf
AM		 1178 case R_390_8:
1179 case R_390_16:
a85d7ed0
NC		 1180 case R_390_32:
1181 case R_390_64:
947216bf
AM		 1182 case R_390_PC16:
1183 case R_390_PC16DBL:
a85d7ed0
NC		 1184 case R_390_PC32:
1185 case R_390_PC32DBL:
1186 case R_390_PC64:
0451c93c
MS		 1187 if (h != NULL && !info->shared)
1188 {
1189 /* If this reloc is in a read-only section, we might
1190 need a copy reloc. We can't check reliably at this
1191 stage whether the section is read-only, as input
1192 sections have not yet been mapped to output sections.
1193 Tentatively set the flag for now, and correct in
1194 adjust_dynamic_symbol. */
f5385ebf 1195 h->non_got_ref = 1;
ec338859 1196
0451c93c
MS		 1197 /* We may need a .plt entry if the function this reloc
1198 refers to is in a shared lib. */
1199 h->plt.refcount += 1;
1200 }
ec338859 1201
a85d7ed0 1202 /* If we are creating a shared library, and this is a reloc
0451c93c
MS		 1203 against a global symbol, or a non PC relative reloc
1204 against a local symbol, then we need to copy the reloc
1205 into the shared library. However, if we are linking with
1206 -Bsymbolic, we do not need to copy a reloc against a
1207 global symbol which is defined in an object we are
1208 including in the link (i.e., DEF_REGULAR is set). At
1209 this point we have not seen all the input files, so it is
1210 possible that DEF_REGULAR is not set now but will be set
1211 later (it is never cleared). In case of a weak definition,
1212 DEF_REGULAR may be cleared later by a strong definition in
1213 a shared library. We account for that possibility below by
1214 storing information in the relocs_copied field of the hash
1215 table entry. A similar situation occurs when creating
1216 shared libraries and symbol visibility changes render the
1217 symbol local.
1218
1219 If on the other hand, we are creating an executable, we
1220 may need to keep relocations for symbols satisfied by a
1221 dynamic library if we manage to avoid copy relocs for the
1222 symbol. */
1223 if ((info->shared
1224 && (sec->flags & SEC_ALLOC) != 0
1225 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1226 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1227 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1228 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1229 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1230 || (h != NULL
1231 && (! info->symbolic
1232 || h->root.type == bfd_link_hash_defweak
f5385ebf 1233 || !h->def_regular))))
64285810
MS		 1234 || (ELIMINATE_COPY_RELOCS
1235 && !info->shared
0451c93c
MS		 1236 && (sec->flags & SEC_ALLOC) != 0
1237 && h != NULL
1238 && (h->root.type == bfd_link_hash_defweak
f5385ebf 1239 || !h->def_regular)))
a85d7ed0 1240 {
ec338859
AM		 1241 struct elf_s390_dyn_relocs *p;
1242 struct elf_s390_dyn_relocs **head;
1243
0451c93c
MS		 1244 /* We must copy these reloc types into the output file.
1245 Create a reloc section in dynobj and make room for
1246 this reloc. */
a85d7ed0
NC		 1247 if (sreloc == NULL)
1248 {
83bac4b0
NC		 1249 sreloc = _bfd_elf_make_dynamic_reloc_section
1250 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
ec338859 1251
a85d7ed0 1252 if (sreloc == NULL)
83bac4b0 1253 return FALSE;
a85d7ed0 1254 }
ec338859 1255
0451c93c
MS		 1256 /* If this is a global symbol, we count the number of
1257 relocations we need for this symbol. */
1258 if (h != NULL)
a85d7ed0 1259 {
ec338859 1260 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
0451c93c
MS		 1261 }
1262 else
1263 {
ec338859
AM		 1264 /* Track dynamic relocs needed for local syms too.
1265 We really need local syms available to do this
1266 easily. Oh well. */
1267
1268 asection *s;
6edfbbad
DJ		 1269 void *vpp;
1270
ec338859
AM		 1271 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1272 sec, r_symndx);
1273 if (s == NULL)
b34976b6 1274 return FALSE;
ec338859 1275
6edfbbad
DJ		 1276 vpp = &elf_section_data (s)->local_dynrel;
1277 head = (struct elf_s390_dyn_relocs **) vpp;
ec338859
AM		 1278 }
1279
1280 p = *head;
1281 if (p == NULL || p->sec != sec)
1282 {
1283 bfd_size_type amt = sizeof *p;
1284 p = ((struct elf_s390_dyn_relocs *)
1285 bfd_alloc (htab->elf.dynobj, amt));
1286 if (p == NULL)
b34976b6 1287 return FALSE;
ec338859
AM		 1288 p->next = *head;
1289 *head = p;
1290 p->sec = sec;
1291 p->count = 0;
1292 p->pc_count = 0;
a85d7ed0 1293 }
ec338859
AM		 1294
1295 p->count += 1;
1296 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1297 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1298 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1299 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1300 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1301 p->pc_count += 1;
a85d7ed0 1302 }
a85d7ed0 1303 break;
ec338859 1304
a85d7ed0
NC		 1305 /* This relocation describes the C++ object vtable hierarchy.
1306 Reconstruct it for later use during GC. */
947216bf 1307 case R_390_GNU_VTINHERIT:
c152c796 1308 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 1309 return FALSE;
947216bf 1310 break;
ec338859 1311
a85d7ed0
NC		 1312 /* This relocation describes which C++ vtable entries are actually
1313 used. Record for later use during GC. */
947216bf 1314 case R_390_GNU_VTENTRY:
d17e0c6e
JB		 1315 BFD_ASSERT (h != NULL);
1316 if (h != NULL
1317 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 1318 return FALSE;
947216bf 1319 break;
ec338859 1320
a85d7ed0
NC		 1321 default:
1322 break;
1323 }
1324 }
1325
b34976b6 1326 return TRUE;
a85d7ed0
NC		 1327}
1328
1329/* Return the section that should be marked against GC for a given
1330 relocation. */
1331
1332static asection *
07adf181
AM		 1333elf_s390_gc_mark_hook (asection *sec,
1334 struct bfd_link_info *info,
1335 Elf_Internal_Rela *rel,
1336 struct elf_link_hash_entry *h,
1337 Elf_Internal_Sym *sym)
a85d7ed0
NC		 1338{
1339 if (h != NULL)
07adf181
AM		 1340 switch (ELF64_R_TYPE (rel->r_info))
1341 {
1342 case R_390_GNU_VTINHERIT:
1343 case R_390_GNU_VTENTRY:
1344 return NULL;
1345 }
1346
1347 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
a85d7ed0
NC		 1348}
1349
1350/* Update the got entry reference counts for the section being removed. */
1351
b34976b6 1352static bfd_boolean
07adf181
AM		 1353elf_s390_gc_sweep_hook (bfd *abfd,
1354 struct bfd_link_info *info,
1355 asection *sec,
1356 const Elf_Internal_Rela *relocs)
a85d7ed0
NC		 1357{
1358 Elf_Internal_Shdr *symtab_hdr;
1359 struct elf_link_hash_entry **sym_hashes;
1360 bfd_signed_vma *local_got_refcounts;
1361 const Elf_Internal_Rela *rel, *relend;
a85d7ed0 1362
7dda2462
TG		 1363 if (info->relocatable)
1364 return TRUE;
1365
ec338859 1366 elf_section_data (sec)->local_dynrel = NULL;
a85d7ed0 1367
0ffa91dd 1368 symtab_hdr = &elf_symtab_hdr (abfd);
0451c93c
MS		 1369 sym_hashes = elf_sym_hashes (abfd);
1370 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0
NC		 1371
1372 relend = relocs + sec->reloc_count;
1373 for (rel = relocs; rel < relend; rel++)
5236c819 1374 {
26e41594
AM		 1375 unsigned long r_symndx;
1376 unsigned int r_type;
1377 struct elf_link_hash_entry *h = NULL;
1378
5236c819 1379 r_symndx = ELF64_R_SYM (rel->r_info);
26e41594
AM		 1380 if (r_symndx >= symtab_hdr->sh_info)
1381 {
1382 struct elf_s390_link_hash_entry *eh;
1383 struct elf_s390_dyn_relocs **pp;
1384 struct elf_s390_dyn_relocs *p;
5236c819 1385
26e41594 1386 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 1387 while (h->root.type == bfd_link_hash_indirect
1388 || h->root.type == bfd_link_hash_warning)
1389 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 1390 eh = (struct elf_s390_link_hash_entry *) h;
5236c819 1391
26e41594
AM		 1392 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1393 if (p->sec == sec)
1394 {
1395 /* Everything must go for SEC. */
1396 *pp = p->next;
1397 break;
1398 }
1399 }
1400
1401 r_type = ELF64_R_TYPE (rel->r_info);
1402 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
69fc87f1 1403 switch (r_type)
5236c819 1404 {
69fc87f1
MS		 1405 case R_390_TLS_LDM64:
1406 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1407 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1408 break;
1409
1410 case R_390_TLS_GD64:
1411 case R_390_TLS_IE64:
1412 case R_390_TLS_GOTIE12:
bd1ea41b 1413 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1414 case R_390_TLS_GOTIE64:
1415 case R_390_TLS_IEENT:
5236c819
MS		 1416 case R_390_GOT12:
1417 case R_390_GOT16:
bd1ea41b 1418 case R_390_GOT20:
5236c819
MS		 1419 case R_390_GOT32:
1420 case R_390_GOT64:
1421 case R_390_GOTOFF16:
1422 case R_390_GOTOFF32:
1423 case R_390_GOTOFF64:
1424 case R_390_GOTPC:
1425 case R_390_GOTPCDBL:
1426 case R_390_GOTENT:
1427 if (h != NULL)
1428 {
1429 if (h->got.refcount > 0)
1430 h->got.refcount -= 1;
1431 }
1432 else if (local_got_refcounts != NULL)
1433 {
1434 if (local_got_refcounts[r_symndx] > 0)
1435 local_got_refcounts[r_symndx] -= 1;
1436 }
26e41594 1437 break;
a85d7ed0 1438
5236c819
MS		 1439 case R_390_8:
1440 case R_390_12:
1441 case R_390_16:
bd1ea41b 1442 case R_390_20:
5236c819
MS		 1443 case R_390_32:
1444 case R_390_64:
1445 case R_390_PC16:
1446 case R_390_PC16DBL:
1447 case R_390_PC32:
1448 case R_390_PC32DBL:
1449 case R_390_PC64:
26e41594
AM		 1450 if (info->shared)
1451 break;
1452 /* Fall through */
a85d7ed0 1453
69fc87f1
MS		 1454 case R_390_PLT16DBL:
1455 case R_390_PLT32:
1456 case R_390_PLT32DBL:
1457 case R_390_PLT64:
1458 case R_390_PLTOFF16:
1459 case R_390_PLTOFF32:
1460 case R_390_PLTOFF64:
1461 if (h != NULL)
1462 {
1463 if (h->plt.refcount > 0)
1464 h->plt.refcount -= 1;
1465 }
1466 break;
1467
1468 case R_390_GOTPLT12:
1469 case R_390_GOTPLT16:
bd1ea41b 1470 case R_390_GOTPLT20:
69fc87f1
MS		 1471 case R_390_GOTPLT32:
1472 case R_390_GOTPLT64:
1473 case R_390_GOTPLTENT:
1474 if (h != NULL)
1475 {
1476 if (h->plt.refcount > 0)
1477 {
1478 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1479 h->plt.refcount -= 1;
1480 }
1481 }
1482 else if (local_got_refcounts != NULL)
1483 {
1484 if (local_got_refcounts[r_symndx] > 0)
1485 local_got_refcounts[r_symndx] -= 1;
1486 }
1487 break;
1488
5236c819
MS		 1489 default:
1490 break;
1491 }
1492 }
a85d7ed0 1493
b34976b6 1494 return TRUE;
a85d7ed0
NC		 1495}
1496
5236c819
MS		 1497/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1498 entry but we found we will not create any. Called when we find we will
1499 not have any PLT for this symbol, by for example
1500 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1501 or elf_s390_size_dynamic_sections if no dynamic sections will be
1502 created (we're only linking static objects). */
1503
1504static void
1505elf_s390_adjust_gotplt (h)
1506 struct elf_s390_link_hash_entry *h;
1507{
1508 if (h->elf.root.type == bfd_link_hash_warning)
1509 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1510
1511 if (h->gotplt_refcount <= 0)
1512 return;
1513
1514 /* We simply add the number of gotplt references to the number
1515 * of got references for this symbol. */
1516 h->elf.got.refcount += h->gotplt_refcount;
1517 h->gotplt_refcount = -1;
1518}
1519
a85d7ed0
NC		 1520/* Adjust a symbol defined by a dynamic object and referenced by a
1521 regular object. The current definition is in some section of the
1522 dynamic object, but we're not including those sections. We have to
1523 change the definition to something the rest of the link can
1524 understand. */
1525
b34976b6 1526static bfd_boolean
a85d7ed0
NC		 1527elf_s390_adjust_dynamic_symbol (info, h)
1528 struct bfd_link_info *info;
1529 struct elf_link_hash_entry *h;
1530{
0451c93c 1531 struct elf_s390_link_hash_table *htab;
a85d7ed0 1532 asection *s;
a85d7ed0 1533
a85d7ed0
NC		 1534 /* If this is a function, put it in the procedure linkage table. We
1535 will fill in the contents of the procedure linkage table later
cedb70c5 1536 (although we could actually do it here). */
a85d7ed0 1537 if (h->type == STT_FUNC
f5385ebf 1538 || h->needs_plt)
a85d7ed0 1539 {
0451c93c
MS		 1540 if (h->plt.refcount <= 0
1541 || (! info->shared
f5385ebf
AM		 1542 && !h->def_dynamic
1543 && !h->ref_dynamic
f9cd9119
MS		 1544 && h->root.type != bfd_link_hash_undefweak
1545 && h->root.type != bfd_link_hash_undefined))
a85d7ed0
NC		 1546 {
1547 /* This case can occur if we saw a PLT32 reloc in an input
947216bf
AM		 1548 file, but the symbol was never referred to by a dynamic
1549 object, or if all references were garbage collected. In
0451c93c
MS		 1550 such a case, we don't actually need to build a procedure
1551 linkage table, and we can just do a PC32 reloc instead. */
a85d7ed0 1552 h->plt.offset = (bfd_vma) -1;
f5385ebf 1553 h->needs_plt = 0;
5236c819 1554 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
a85d7ed0
NC		 1555 }
1556
b34976b6 1557 return TRUE;
a85d7ed0 1558 }
bbd7ec4a 1559 else
0451c93c
MS		 1560 /* It's possible that we incorrectly decided a .plt reloc was
1561 needed for an R_390_PC32 reloc to a non-function sym in
1562 check_relocs. We can't decide accurately between function and
1563 non-function syms in check-relocs; Objects loaded later in
1564 the link may change h->type. So fix it now. */
bbd7ec4a 1565 h->plt.offset = (bfd_vma) -1;
a85d7ed0
NC		 1566
1567 /* If this is a weak symbol, and there is a real definition, the
1568 processor independent code will have arranged for us to see the
1569 real definition first, and we can just use the same value. */
f6e332e6 1570 if (h->u.weakdef != NULL)
a85d7ed0 1571 {
f6e332e6
AM		 1572 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1573 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1574 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1575 h->root.u.def.value = h->u.weakdef->root.u.def.value;
64285810 1576 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 1577 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 1578 return TRUE;
a85d7ed0
NC		 1579 }
1580
1581 /* This is a reference to a symbol defined by a dynamic object which
1582 is not a function. */
1583
1584 /* If we are creating a shared library, we must presume that the
1585 only references to the symbol are via the global offset table.
1586 For such cases we need not do anything here; the relocations will
1587 be handled correctly by relocate_section. */
1588 if (info->shared)
b34976b6 1589 return TRUE;
a85d7ed0
NC		 1590
1591 /* If there are no references to this symbol that do not use the
1592 GOT, we don't need to generate a copy reloc. */
f5385ebf 1593 if (!h->non_got_ref)
b34976b6 1594 return TRUE;
a85d7ed0 1595
0451c93c
MS		 1596 /* If -z nocopyreloc was given, we won't generate them either. */
1597 if (info->nocopyreloc)
1598 {
f5385ebf 1599 h->non_got_ref = 0;
b34976b6 1600 return TRUE;
0451c93c
MS		 1601 }
1602
64285810 1603 if (ELIMINATE_COPY_RELOCS)
0451c93c 1604 {
64285810
MS		 1605 struct elf_s390_link_hash_entry * eh;
1606 struct elf_s390_dyn_relocs *p;
0451c93c 1607
64285810
MS		 1608 eh = (struct elf_s390_link_hash_entry *) h;
1609 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1610 {
1611 s = p->sec->output_section;
1612 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1613 break;
1614 }
1615
1616 /* If we didn't find any dynamic relocs in read-only sections, then
1617 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1618 if (p == NULL)
1619 {
f5385ebf 1620 h->non_got_ref = 0;
64285810
MS		 1621 return TRUE;
1622 }
0451c93c
MS		 1623 }
1624
909272ee
AM		 1625 if (h->size == 0)
1626 {
1627 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1628 h->root.root.string);
1629 return TRUE;
1630 }
1631
a85d7ed0
NC		 1632 /* We must allocate the symbol in our .dynbss section, which will
1633 become part of the .bss section of the executable. There will be
1634 an entry for this symbol in the .dynsym section. The dynamic
1635 object will contain position independent code, so all references
1636 from the dynamic object to this symbol will go through the global
1637 offset table. The dynamic linker will use the .dynsym entry to
1638 determine the address it must put in the global offset table, so
1639 both the dynamic object and the regular object will refer to the
1640 same memory location for the variable. */
1641
0451c93c 1642 htab = elf_s390_hash_table (info);
a85d7ed0 1643
0451c93c
MS		 1644 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1645 copy the initial value out of the dynamic object and into the
1646 runtime process image. */
a85d7ed0
NC		 1647 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1648 {
eea6121a 1649 htab->srelbss->size += sizeof (Elf64_External_Rela);
f5385ebf 1650 h->needs_copy = 1;
a85d7ed0
NC		 1651 }
1652
0451c93c 1653 s = htab->sdynbss;
a85d7ed0 1654
027297b7 1655 return _bfd_elf_adjust_dynamic_copy (h, s);
a85d7ed0
NC		 1656}
1657
0451c93c
MS		 1658/* Allocate space in .plt, .got and associated reloc sections for
1659 dynamic relocs. */
1660
b34976b6 1661static bfd_boolean
0451c93c
MS		 1662allocate_dynrelocs (h, inf)
1663 struct elf_link_hash_entry *h;
1664 PTR inf;
1665{
1666 struct bfd_link_info *info;
1667 struct elf_s390_link_hash_table *htab;
1668 struct elf_s390_link_hash_entry *eh;
1669 struct elf_s390_dyn_relocs *p;
1670
e92d460e 1671 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1672 return TRUE;
0451c93c 1673
e92d460e 1674 if (h->root.type == bfd_link_hash_warning)
5236c819
MS		 1675 /* When warning symbols are created, they **replace** the "real"
1676 entry in the hash table, thus we never get to see the real
1677 symbol in a hash traversal. So look at it now. */
e92d460e
AM		 1678 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1679
0451c93c
MS		 1680 info = (struct bfd_link_info *) inf;
1681 htab = elf_s390_hash_table (info);
1682
1683 if (htab->elf.dynamic_sections_created
82058a73
MS		 1684 && h->plt.refcount > 0
1685 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1686 || h->root.type != bfd_link_hash_undefweak))
0451c93c
MS		 1687 {
1688 /* Make sure this symbol is output as a dynamic symbol.
1689 Undefined weak syms won't yet be marked as dynamic. */
1690 if (h->dynindx == -1
f5385ebf 1691 && !h->forced_local)
0451c93c 1692 {
c152c796 1693 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1694 return FALSE;
0451c93c
MS		 1695 }
1696
82058a73 1697 if (info->shared
4ec72bde 1698 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
0451c93c
MS		 1699 {
1700 asection *s = htab->splt;
1701
1702 /* If this is the first .plt entry, make room for the special
1703 first entry. */
eea6121a
AM		 1704 if (s->size == 0)
1705 s->size += PLT_FIRST_ENTRY_SIZE;
0451c93c 1706
eea6121a 1707 h->plt.offset = s->size;
0451c93c
MS		 1708
1709 /* If this symbol is not defined in a regular file, and we are
1710 not generating a shared library, then set the symbol to this
1711 location in the .plt. This is required to make function
1712 pointers compare as equal between the normal executable and
1713 the shared library. */
1714 if (! info->shared
f5385ebf 1715 && !h->def_regular)
0451c93c
MS		 1716 {
1717 h->root.u.def.section = s;
1718 h->root.u.def.value = h->plt.offset;
1719 }
ec338859 1720
0451c93c 1721 /* Make room for this entry. */
eea6121a 1722 s->size += PLT_ENTRY_SIZE;
ec338859 1723
0451c93c
MS		 1724 /* We also need to make an entry in the .got.plt section, which
1725 will be placed in the .got section by the linker script. */
eea6121a 1726 htab->sgotplt->size += GOT_ENTRY_SIZE;
0451c93c
MS		 1727
1728 /* We also need to make an entry in the .rela.plt section. */
eea6121a 1729 htab->srelplt->size += sizeof (Elf64_External_Rela);
0451c93c
MS		 1730 }
1731 else
1732 {
1733 h->plt.offset = (bfd_vma) -1;
f5385ebf 1734 h->needs_plt = 0;
5236c819 1735 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1736 }
1737 }
1738 else
1739 {
1740 h->plt.offset = (bfd_vma) -1;
f5385ebf 1741 h->needs_plt = 0;
5236c819 1742 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1743 }
1744
69fc87f1
MS		 1745 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1746 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1747 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1748 we can save the dynamic TLS relocation. */
1749 if (h->got.refcount > 0
1750 && !info->shared
1751 && h->dynindx == -1
1752 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1753 {
1754 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1755 /* For the GOTIE access without a literal pool entry the offset has
1756 to be stored somewhere. The immediate value in the instruction
1757 is not bit enough so the value is stored in the got. */
1758 {
eea6121a
AM		 1759 h->got.offset = htab->sgot->size;
1760 htab->sgot->size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1761 }
1762 else
1763 h->got.offset = (bfd_vma) -1;
1764 }
1765 else if (h->got.refcount > 0)
0451c93c
MS		 1766 {
1767 asection *s;
b34976b6 1768 bfd_boolean dyn;
69fc87f1 1769 int tls_type = elf_s390_hash_entry(h)->tls_type;
0451c93c
MS		 1770
1771 /* Make sure this symbol is output as a dynamic symbol.
1772 Undefined weak syms won't yet be marked as dynamic. */
1773 if (h->dynindx == -1
f5385ebf 1774 && !h->forced_local)
0451c93c 1775 {
c152c796 1776 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1777 return FALSE;
0451c93c
MS		 1778 }
1779
1780 s = htab->sgot;
eea6121a
AM		 1781 h->got.offset = s->size;
1782 s->size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1783 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1784 if (tls_type == GOT_TLS_GD)
eea6121a 1785 s->size += GOT_ENTRY_SIZE;
0451c93c 1786 dyn = htab->elf.dynamic_sections_created;
69fc87f1
MS		 1787 /* R_390_TLS_IE64 needs one dynamic relocation,
1788 R_390_TLS_GD64 needs one if local symbol and two if global. */
1789 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1790 || tls_type >= GOT_TLS_IE)
eea6121a 1791 htab->srelgot->size += sizeof (Elf64_External_Rela);
69fc87f1 1792 else if (tls_type == GOT_TLS_GD)
eea6121a 1793 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
82058a73
MS		 1794 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1795 || h->root.type != bfd_link_hash_undefweak)
1796 && (info->shared
1797 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
eea6121a 1798 htab->srelgot->size += sizeof (Elf64_External_Rela);
0451c93c
MS		 1799 }
1800 else
1801 h->got.offset = (bfd_vma) -1;
1802
1803 eh = (struct elf_s390_link_hash_entry *) h;
1804 if (eh->dyn_relocs == NULL)
b34976b6 1805 return TRUE;
0451c93c
MS		 1806
1807 /* In the shared -Bsymbolic case, discard space allocated for
1808 dynamic pc-relative relocs against symbols which turn out to be
1809 defined in regular objects. For the normal shared case, discard
1810 space for pc-relative relocs that have become local due to symbol
1811 visibility changes. */
1812
1813 if (info->shared)
1814 {
1c3ff0f2 1815 if (SYMBOL_REFERENCES_LOCAL (info, h))
0451c93c
MS		 1816 {
1817 struct elf_s390_dyn_relocs **pp;
1818
1819 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1820 {
1821 p->count -= p->pc_count;
1822 p->pc_count = 0;
1823 if (p->count == 0)
1824 *pp = p->next;
1825 else
1826 pp = &p->next;
1827 }
1828 }
82058a73
MS		 1829
1830 /* Also discard relocs on undefined weak syms with non-default
1831 visibility. */
22d606e9 1832 if (eh->dyn_relocs != NULL
82058a73 1833 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM		 1834 {
1835 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1836 eh->dyn_relocs = NULL;
1837
1838 /* Make sure undefined weak symbols are output as a dynamic
1839 symbol in PIEs. */
1840 else if (h->dynindx == -1
1841 && !h->forced_local)
1842 {
1843 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1844 return FALSE;
1845 }
1846 }
0451c93c 1847 }
64285810 1848 else if (ELIMINATE_COPY_RELOCS)
0451c93c
MS		 1849 {
1850 /* For the non-shared case, discard space for relocs against
1851 symbols which turn out to need copy relocs or are not
1852 dynamic. */
1853
f5385ebf
AM		 1854 if (!h->non_got_ref
1855 && ((h->def_dynamic
1856 && !h->def_regular)
0451c93c
MS		 1857 || (htab->elf.dynamic_sections_created
1858 && (h->root.type == bfd_link_hash_undefweak
1859 || h->root.type == bfd_link_hash_undefined))))
1860 {
1861 /* Make sure this symbol is output as a dynamic symbol.
1862 Undefined weak syms won't yet be marked as dynamic. */
1863 if (h->dynindx == -1
f5385ebf 1864 && !h->forced_local)
0451c93c 1865 {
c152c796 1866 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1867 return FALSE;
0451c93c
MS		 1868 }
1869
1870 /* If that succeeded, we know we'll be keeping all the
1871 relocs. */
1872 if (h->dynindx != -1)
1873 goto keep;
1874 }
1875
1876 eh->dyn_relocs = NULL;
1877
ec338859 1878 keep: ;
0451c93c
MS		 1879 }
1880
1881 /* Finally, allocate space. */
1882 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1883 {
1884 asection *sreloc = elf_section_data (p->sec)->sreloc;
eea6121a 1885 sreloc->size += p->count * sizeof (Elf64_External_Rela);
0451c93c
MS		 1886 }
1887
b34976b6 1888 return TRUE;
0451c93c
MS		 1889}
1890
1891/* Find any dynamic relocs that apply to read-only sections. */
1892
b34976b6 1893static bfd_boolean
0451c93c
MS		 1894readonly_dynrelocs (h, inf)
1895 struct elf_link_hash_entry *h;
1896 PTR inf;
1897{
1898 struct elf_s390_link_hash_entry *eh;
1899 struct elf_s390_dyn_relocs *p;
1900
e92d460e
AM		 1901 if (h->root.type == bfd_link_hash_warning)
1902 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1903
0451c93c
MS		 1904 eh = (struct elf_s390_link_hash_entry *) h;
1905 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1906 {
1907 asection *s = p->sec->output_section;
1908
1909 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1910 {
1911 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1912
1913 info->flags |= DF_TEXTREL;
1914
1915 /* Not an error, just cut short the traversal. */
b34976b6 1916 return FALSE;
0451c93c
MS		 1917 }
1918 }
b34976b6 1919 return TRUE;
0451c93c
MS		 1920}
1921
a85d7ed0
NC		 1922/* Set the sizes of the dynamic sections. */
1923
b34976b6 1924static bfd_boolean
a85d7ed0 1925elf_s390_size_dynamic_sections (output_bfd, info)
29c2fb7c 1926 bfd *output_bfd ATTRIBUTE_UNUSED;
a85d7ed0
NC		 1927 struct bfd_link_info *info;
1928{
0451c93c 1929 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1930 bfd *dynobj;
1931 asection *s;
b34976b6 1932 bfd_boolean relocs;
0451c93c 1933 bfd *ibfd;
a85d7ed0 1934
0451c93c
MS		 1935 htab = elf_s390_hash_table (info);
1936 dynobj = htab->elf.dynobj;
1937 if (dynobj == NULL)
1938 abort ();
a85d7ed0 1939
0451c93c 1940 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 1941 {
1942 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 1943 if (info->executable)
a85d7ed0
NC		 1944 {
1945 s = bfd_get_section_by_name (dynobj, ".interp");
0451c93c
MS		 1946 if (s == NULL)
1947 abort ();
eea6121a 1948 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
a85d7ed0
NC		 1949 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1950 }
1951 }
a85d7ed0 1952
0451c93c
MS		 1953 /* Set up .got offsets for local syms, and space for local dynamic
1954 relocs. */
1955 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
a85d7ed0 1956 {
0451c93c
MS		 1957 bfd_signed_vma *local_got;
1958 bfd_signed_vma *end_local_got;
69fc87f1 1959 char *local_tls_type;
0451c93c
MS		 1960 bfd_size_type locsymcount;
1961 Elf_Internal_Shdr *symtab_hdr;
1962 asection *srela;
a85d7ed0 1963
0ffa91dd 1964 if (! is_s390_elf (ibfd))
a85d7ed0
NC		 1965 continue;
1966
0451c93c 1967 for (s = ibfd->sections; s != NULL; s = s->next)
a85d7ed0 1968 {
ec338859 1969 struct elf_s390_dyn_relocs *p;
0451c93c 1970
6edfbbad 1971 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
a85d7ed0 1972 {
ec338859
AM		 1973 if (!bfd_is_abs_section (p->sec)
1974 && bfd_is_abs_section (p->sec->output_section))
1975 {
1976 /* Input section has been discarded, either because
1977 it is a copy of a linkonce section or due to
1978 linker script /DISCARD/, so we'll be discarding
1979 the relocs too. */
1980 }
248866a8 1981 else if (p->count != 0)
ec338859
AM		 1982 {
1983 srela = elf_section_data (p->sec)->sreloc;
eea6121a 1984 srela->size += p->count * sizeof (Elf64_External_Rela);
248866a8
AM		 1985 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1986 info->flags |= DF_TEXTREL;
ec338859 1987 }
a85d7ed0
NC		 1988 }
1989 }
0451c93c
MS		 1990
1991 local_got = elf_local_got_refcounts (ibfd);
1992 if (!local_got)
1993 continue;
1994
0ffa91dd 1995 symtab_hdr = &elf_symtab_hdr (ibfd);
0451c93c
MS		 1996 locsymcount = symtab_hdr->sh_info;
1997 end_local_got = local_got + locsymcount;
69fc87f1 1998 local_tls_type = elf_s390_local_got_tls_type (ibfd);
0451c93c
MS		 1999 s = htab->sgot;
2000 srela = htab->srelgot;
69fc87f1 2001 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
a85d7ed0 2002 {
0451c93c 2003 if (*local_got > 0)
a85d7ed0 2004 {
eea6121a
AM		 2005 *local_got = s->size;
2006 s->size += GOT_ENTRY_SIZE;
69fc87f1 2007 if (*local_tls_type == GOT_TLS_GD)
eea6121a 2008 s->size += GOT_ENTRY_SIZE;
0451c93c 2009 if (info->shared)
eea6121a 2010 srela->size += sizeof (Elf64_External_Rela);
a85d7ed0
NC		 2011 }
2012 else
0451c93c 2013 *local_got = (bfd_vma) -1;
a85d7ed0 2014 }
0451c93c
MS		 2015 }
2016
69fc87f1
MS		 2017 if (htab->tls_ldm_got.refcount > 0)
2018 {
2019 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2020 relocs. */
eea6121a
AM		 2021 htab->tls_ldm_got.offset = htab->sgot->size;
2022 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2023 htab->srelgot->size += sizeof (Elf64_External_Rela);
69fc87f1
MS		 2024 }
2025 else
2026 htab->tls_ldm_got.offset = -1;
2027
0451c93c
MS		 2028 /* Allocate global sym .plt and .got entries, and space for global
2029 sym dynamic relocs. */
2030 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2031
2032 /* We now have determined the sizes of the various dynamic sections.
2033 Allocate memory for them. */
b34976b6 2034 relocs = FALSE;
0451c93c
MS		 2035 for (s = dynobj->sections; s != NULL; s = s->next)
2036 {
2037 if ((s->flags & SEC_LINKER_CREATED) == 0)
2038 continue;
2039
2040 if (s == htab->splt
2041 || s == htab->sgot
c456f082
AM		 2042 || s == htab->sgotplt
2043 || s == htab->sdynbss)
0451c93c
MS		 2044 {
2045 /* Strip this section if we don't need it; see the
2046 comment below. */
2047 }
0112cd26 2048 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
0451c93c 2049 {
eea6121a 2050 if (s->size != 0 && s != htab->srelplt)
b34976b6 2051 relocs = TRUE;
ec338859 2052
0451c93c
MS		 2053 /* We use the reloc_count field as a counter if we need
2054 to copy relocs into the output file. */
2055 s->reloc_count = 0;
2056 }
2057 else
a85d7ed0
NC		 2058 {
2059 /* It's not one of our sections, so don't allocate space. */
2060 continue;
2061 }
2062
eea6121a 2063 if (s->size == 0)
a85d7ed0 2064 {
0451c93c
MS		 2065 /* If we don't need this section, strip it from the
2066 output file. This is to handle .rela.bss and
2067 .rela.plt. We must create it in
2068 create_dynamic_sections, because it must be created
2069 before the linker maps input sections to output
2070 sections. The linker does that before
2071 adjust_dynamic_symbol is called, and it is that
2072 function which decides whether anything needs to go
2073 into these sections. */
2074
8423293d 2075 s->flags |= SEC_EXCLUDE;
a85d7ed0
NC		 2076 continue;
2077 }
2078
c456f082
AM		 2079 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2080 continue;
2081
0451c93c
MS		 2082 /* Allocate memory for the section contents. We use bfd_zalloc
2083 here in case unused entries are not reclaimed before the
2084 section's contents are written out. This should not happen,
2085 but this way if it does, we get a R_390_NONE reloc instead
2086 of garbage. */
eea6121a 2087 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
0451c93c 2088 if (s->contents == NULL)
b34976b6 2089 return FALSE;
a85d7ed0
NC		 2090 }
2091
0451c93c 2092 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 2093 {
2094 /* Add some entries to the .dynamic section. We fill in the
2095 values later, in elf_s390_finish_dynamic_sections, but we
2096 must add the entries now so that we get the correct size for
2097 the .dynamic section. The DT_DEBUG entry is filled in by the
2098 dynamic linker and used by the debugger. */
dc810e39 2099#define add_dynamic_entry(TAG, VAL) \
5a580b3a 2100 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 2101
36af4a4e 2102 if (info->executable)
a85d7ed0 2103 {
dc810e39 2104 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2105 return FALSE;
a85d7ed0
NC		 2106 }
2107
eea6121a 2108 if (htab->splt->size != 0)
a85d7ed0 2109 {
dc810e39
AM		 2110 if (!add_dynamic_entry (DT_PLTGOT, 0)
2111 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2112 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2113 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 2114 return FALSE;
a85d7ed0
NC		 2115 }
2116
2117 if (relocs)
947216bf
AM		 2118 {
2119 if (!add_dynamic_entry (DT_RELA, 0)
2120 || !add_dynamic_entry (DT_RELASZ, 0)
2121 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
b34976b6 2122 return FALSE;
ec338859 2123
0451c93c
MS		 2124 /* If any dynamic relocs apply to a read-only section,
2125 then we need a DT_TEXTREL entry. */
248866a8
AM		 2126 if ((info->flags & DF_TEXTREL) == 0)
2127 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2128 (PTR) info);
ec338859 2129
0451c93c
MS		 2130 if ((info->flags & DF_TEXTREL) != 0)
2131 {
2132 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2133 return FALSE;
0451c93c 2134 }
a85d7ed0
NC		 2135 }
2136 }
dc810e39 2137#undef add_dynamic_entry
a85d7ed0 2138
b34976b6 2139 return TRUE;
a85d7ed0
NC		 2140}
2141
69fc87f1
MS		 2142/* Return the base VMA address which should be subtracted from real addresses
2143 when resolving @dtpoff relocation.
2144 This is PT_TLS segment p_vaddr. */
2145
2146static bfd_vma
2147dtpoff_base (info)
2148 struct bfd_link_info *info;
2149{
e1918d23
AM		 2150 /* If tls_sec is NULL, we should have signalled an error already. */
2151 if (elf_hash_table (info)->tls_sec == NULL)
69fc87f1 2152 return 0;
e1918d23 2153 return elf_hash_table (info)->tls_sec->vma;
69fc87f1
MS		 2154}
2155
2156/* Return the relocation value for @tpoff relocation
2157 if STT_TLS virtual address is ADDRESS. */
2158
2159static bfd_vma
2160tpoff (info, address)
2161 struct bfd_link_info *info;
2162 bfd_vma address;
2163{
e1918d23 2164 struct elf_link_hash_table *htab = elf_hash_table (info);
69fc87f1 2165
e1918d23
AM		 2166 /* If tls_sec is NULL, we should have signalled an error already. */
2167 if (htab->tls_sec == NULL)
69fc87f1 2168 return 0;
e1918d23 2169 return htab->tls_size + htab->tls_sec->vma - address;
69fc87f1
MS		 2170}
2171
2172/* Complain if TLS instruction relocation is against an invalid
2173 instruction. */
2174
2175static void
2176invalid_tls_insn (input_bfd, input_section, rel)
2177 bfd *input_bfd;
2178 asection *input_section;
2179 Elf_Internal_Rela *rel;
2180{
2181 reloc_howto_type *howto;
2182
2183 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2184 (*_bfd_error_handler)
d003868e
AM		 2185 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2186 input_bfd,
2187 input_section,
69fc87f1
MS		 2188 (long) rel->r_offset,
2189 howto->name);
77df2968 2190 bfd_set_error (bfd_error_bad_value);
69fc87f1
MS		 2191}
2192
a85d7ed0
NC		 2193/* Relocate a 390 ELF section. */
2194
b34976b6 2195static bfd_boolean
a85d7ed0
NC		 2196elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2197 contents, relocs, local_syms, local_sections)
2198 bfd *output_bfd;
2199 struct bfd_link_info *info;
2200 bfd *input_bfd;
2201 asection *input_section;
2202 bfd_byte *contents;
2203 Elf_Internal_Rela *relocs;
2204 Elf_Internal_Sym *local_syms;
2205 asection **local_sections;
2206{
0451c93c 2207 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 2208 Elf_Internal_Shdr *symtab_hdr;
2209 struct elf_link_hash_entry **sym_hashes;
2210 bfd_vma *local_got_offsets;
a85d7ed0
NC		 2211 Elf_Internal_Rela *rel;
2212 Elf_Internal_Rela *relend;
2213
0ffa91dd
NC		 2214 BFD_ASSERT (is_s390_elf (input_bfd));
2215
0451c93c 2216 htab = elf_s390_hash_table (info);
0ffa91dd 2217 symtab_hdr = &elf_symtab_hdr (input_bfd);
a85d7ed0
NC		 2218 sym_hashes = elf_sym_hashes (input_bfd);
2219 local_got_offsets = elf_local_got_offsets (input_bfd);
2220
a85d7ed0
NC		 2221 rel = relocs;
2222 relend = relocs + input_section->reloc_count;
2223 for (; rel < relend; rel++)
2224 {
5236c819 2225 unsigned int r_type;
a85d7ed0
NC		 2226 reloc_howto_type *howto;
2227 unsigned long r_symndx;
2228 struct elf_link_hash_entry *h;
2229 Elf_Internal_Sym *sym;
2230 asection *sec;
0451c93c 2231 bfd_vma off;
a85d7ed0 2232 bfd_vma relocation;
b34976b6 2233 bfd_boolean unresolved_reloc;
a85d7ed0 2234 bfd_reloc_status_type r;
69fc87f1 2235 int tls_type;
a85d7ed0
NC		 2236
2237 r_type = ELF64_R_TYPE (rel->r_info);
0451c93c 2238 if (r_type == (int) R_390_GNU_VTINHERIT
947216bf
AM		 2239 || r_type == (int) R_390_GNU_VTENTRY)
2240 continue;
5236c819 2241 if (r_type >= (int) R_390_max)
a85d7ed0
NC		 2242 {
2243 bfd_set_error (bfd_error_bad_value);
b34976b6 2244 return FALSE;
a85d7ed0 2245 }
a85d7ed0 2246
b491616a 2247 howto = elf_howto_table + r_type;
a85d7ed0 2248 r_symndx = ELF64_R_SYM (rel->r_info);
5236c819 2249
a85d7ed0
NC		 2250 h = NULL;
2251 sym = NULL;
2252 sec = NULL;
b34976b6 2253 unresolved_reloc = FALSE;
a85d7ed0
NC		 2254 if (r_symndx < symtab_hdr->sh_info)
2255 {
2256 sym = local_syms + r_symndx;
2257 sec = local_sections[r_symndx];
8517fae7 2258 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
a85d7ed0
NC		 2259 }
2260 else
2261 {
560e09e9 2262 bfd_boolean warned ATTRIBUTE_UNUSED;
0451c93c 2263
b2a8e766
AM		 2264 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2265 r_symndx, symtab_hdr, sym_hashes,
2266 h, sec, relocation,
2267 unresolved_reloc, warned);
a85d7ed0
NC		 2268 }
2269
ab96bf03
AM		 2270 if (sec != NULL && elf_discarded_section (sec))
2271 {
2272 /* For relocs against symbols from removed linkonce sections,
2273 or sections discarded by a linker script, we just want the
2274 section contents zeroed. Avoid any special processing. */
2275 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2276 rel->r_info = 0;
2277 rel->r_addend = 0;
2278 continue;
2279 }
2280
2281 if (info->relocatable)
2282 continue;
2283
a85d7ed0
NC		 2284 switch (r_type)
2285 {
5236c819
MS		 2286 case R_390_GOTPLT12:
2287 case R_390_GOTPLT16:
bd1ea41b 2288 case R_390_GOTPLT20:
5236c819
MS		 2289 case R_390_GOTPLT32:
2290 case R_390_GOTPLT64:
2291 case R_390_GOTPLTENT:
2292 /* There are three cases for a GOTPLT relocation. 1) The
2293 relocation is against the jump slot entry of a plt that
2294 will get emitted to the output file. 2) The relocation
2295 is against the jump slot of a plt entry that has been
2296 removed. elf_s390_adjust_gotplt has created a GOT entry
2297 as replacement. 3) The relocation is against a local symbol.
2298 Cases 2) and 3) are the same as the GOT relocation code
2299 so we just have to test for case 1 and fall through for
2300 the other two. */
2301 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2302 {
2303 bfd_vma plt_index;
2304
2305 /* Calc. index no.
2306 Current offset - size first entry / entry size. */
2307 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2308 PLT_ENTRY_SIZE;
26e41594 2309
5236c819
MS		 2310 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2311 addr & GOT addr. */
2312 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2313 unresolved_reloc = FALSE;
2314
2315 if (r_type == R_390_GOTPLTENT)
26e41594 2316 relocation += htab->sgot->output_section->vma;
5236c819
MS		 2317 break;
2318 }
2319 /* Fall through. */
2320
947216bf
AM		 2321 case R_390_GOT12:
2322 case R_390_GOT16:
bd1ea41b 2323 case R_390_GOT20:
947216bf
AM		 2324 case R_390_GOT32:
2325 case R_390_GOT64:
2326 case R_390_GOTENT:
2327 /* Relocation is to the entry for this symbol in the global
2328 offset table. */
0451c93c
MS		 2329 if (htab->sgot == NULL)
2330 abort ();
a85d7ed0 2331
947216bf
AM		 2332 if (h != NULL)
2333 {
b34976b6 2334 bfd_boolean dyn;
a85d7ed0 2335
947216bf 2336 off = h->got.offset;
0451c93c 2337 dyn = htab->elf.dynamic_sections_created;
4ec72bde 2338 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
947216bf
AM		 2339 || (info->shared
2340 && (info->symbolic
0451c93c 2341 || h->dynindx == -1
f5385ebf
AM		 2342 || h->forced_local)
2343 && h->def_regular)
82058a73
MS		 2344 || (ELF_ST_VISIBILITY (h->other)
2345 && h->root.type == bfd_link_hash_undefweak))
947216bf
AM		 2346 {
2347 /* This is actually a static link, or it is a
2348 -Bsymbolic link and the symbol is defined
2349 locally, or the symbol was forced to be local
2350 because of a version file. We must initialize
2351 this entry in the global offset table. Since the
2352 offset must always be a multiple of 2, we use the
2353 least significant bit to record whether we have
2354 initialized it already.
2355
2356 When doing a dynamic link, we create a .rel.got
2357 relocation entry to initialize the value. This
2358 is done in the finish_dynamic_symbol routine. */
2359 if ((off & 1) != 0)
2360 off &= ~1;
2361 else
2362 {
a85d7ed0 2363 bfd_put_64 (output_bfd, relocation,
0451c93c 2364 htab->sgot->contents + off);
947216bf
AM		 2365 h->got.offset |= 1;
2366 }
2367 }
0451c93c 2368 else
b34976b6 2369 unresolved_reloc = FALSE;
947216bf
AM		 2370 }
2371 else
2372 {
0451c93c
MS		 2373 if (local_got_offsets == NULL)
2374 abort ();
a85d7ed0 2375
947216bf 2376 off = local_got_offsets[r_symndx];
a85d7ed0 2377
947216bf
AM		 2378 /* The offset must always be a multiple of 8. We use
2379 the least significant bit to record whether we have
2380 already generated the necessary reloc. */
2381 if ((off & 1) != 0)
2382 off &= ~1;
2383 else
2384 {
2385 bfd_put_64 (output_bfd, relocation,
0451c93c 2386 htab->sgot->contents + off);
a85d7ed0 2387
947216bf
AM		 2388 if (info->shared)
2389 {
2390 asection *s;
2391 Elf_Internal_Rela outrel;
2392 bfd_byte *loc;
a85d7ed0 2393
947216bf
AM		 2394 s = htab->srelgot;
2395 if (s == NULL)
0451c93c 2396 abort ();
a85d7ed0 2397
947216bf
AM		 2398 outrel.r_offset = (htab->sgot->output_section->vma
2399 + htab->sgot->output_offset
2400 + off);
2401 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
a85d7ed0 2402 outrel.r_addend = relocation;
947216bf
AM		 2403 loc = s->contents;
2404 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2405 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2406 }
a85d7ed0 2407
947216bf
AM		 2408 local_got_offsets[r_symndx] |= 1;
2409 }
2410 }
a85d7ed0 2411
0451c93c
MS		 2412 if (off >= (bfd_vma) -2)
2413 abort ();
2414
2415 relocation = htab->sgot->output_offset + off;
2416
ae9a127f
NC		 2417 /* For @GOTENT the relocation is against the offset between
2418 the instruction and the symbols entry in the GOT and not
2419 between the start of the GOT and the symbols entry. We
2420 add the vma of the GOT to get the correct value. */
5236c819
MS		 2421 if ( r_type == R_390_GOTENT
2422 || r_type == R_390_GOTPLTENT)
0451c93c 2423 relocation += htab->sgot->output_section->vma;
a85d7ed0 2424
947216bf 2425 break;
99c79b2e 2426
5236c819
MS		 2427 case R_390_GOTOFF16:
2428 case R_390_GOTOFF32:
2429 case R_390_GOTOFF64:
947216bf
AM		 2430 /* Relocation is relative to the start of the global offset
2431 table. */
a85d7ed0 2432
947216bf
AM		 2433 /* Note that sgot->output_offset is not involved in this
2434 calculation. We always want the start of .got. If we
2435 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2436 permitted by the ABI, we might have to change this
2437 calculation. */
2438 relocation -= htab->sgot->output_section->vma;
947216bf 2439 break;
a85d7ed0 2440
947216bf 2441 case R_390_GOTPC:
a85d7ed0 2442 case R_390_GOTPCDBL:
947216bf
AM		 2443 /* Use global offset table as symbol value. */
2444 relocation = htab->sgot->output_section->vma;
b34976b6 2445 unresolved_reloc = FALSE;
947216bf 2446 break;
a85d7ed0 2447
947216bf
AM		 2448 case R_390_PLT16DBL:
2449 case R_390_PLT32:
2450 case R_390_PLT32DBL:
2451 case R_390_PLT64:
2452 /* Relocation is to the entry for this symbol in the
2453 procedure linkage table. */
a85d7ed0 2454
947216bf
AM		 2455 /* Resolve a PLT32 reloc against a local symbol directly,
2456 without using the procedure linkage table. */
2457 if (h == NULL)
2458 break;
a85d7ed0 2459
947216bf 2460 if (h->plt.offset == (bfd_vma) -1
0451c93c 2461 || htab->splt == NULL)
947216bf
AM		 2462 {
2463 /* We didn't make a PLT entry for this symbol. This
2464 happens when statically linking PIC code, or when
2465 using -Bsymbolic. */
2466 break;
2467 }
2468
2469 relocation = (htab->splt->output_section->vma
2470 + htab->splt->output_offset
2471 + h->plt.offset);
b34976b6 2472 unresolved_reloc = FALSE;
26e41594 2473 break;
5236c819
MS		 2474
2475 case R_390_PLTOFF16:
2476 case R_390_PLTOFF32:
2477 case R_390_PLTOFF64:
26e41594
AM		 2478 /* Relocation is to the entry for this symbol in the
2479 procedure linkage table relative to the start of the GOT. */
5236c819
MS		 2480
2481 /* For local symbols or if we didn't make a PLT entry for
2482 this symbol resolve the symbol directly. */
26e41594 2483 if ( h == NULL
5236c819
MS		 2484 || h->plt.offset == (bfd_vma) -1
2485 || htab->splt == NULL)
2486 {
2487 relocation -= htab->sgot->output_section->vma;
2488 break;
2489 }
2490
26e41594
AM		 2491 relocation = (htab->splt->output_section->vma
2492 + htab->splt->output_offset
2493 + h->plt.offset
5236c819
MS		 2494 - htab->sgot->output_section->vma);
2495 unresolved_reloc = FALSE;
947216bf
AM		 2496 break;
2497
2498 case R_390_8:
2499 case R_390_16:
2500 case R_390_32:
2501 case R_390_64:
2502 case R_390_PC16:
2503 case R_390_PC16DBL:
2504 case R_390_PC32:
a85d7ed0 2505 case R_390_PC32DBL:
947216bf 2506 case R_390_PC64:
b1e24c02 2507 if ((input_section->flags & SEC_ALLOC) == 0)
ec338859
AM		 2508 break;
2509
947216bf 2510 if ((info->shared
82058a73
MS		 2511 && (h == NULL
2512 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2513 || h->root.type != bfd_link_hash_undefweak)
0451c93c
MS		 2514 && ((r_type != R_390_PC16
2515 && r_type != R_390_PC16DBL
2516 && r_type != R_390_PC32
2517 && r_type != R_390_PC32DBL
2518 && r_type != R_390_PC64)
2519 || (h != NULL
1c3ff0f2 2520 && !SYMBOL_REFERENCES_LOCAL (info, h))))
64285810
MS		 2521 || (ELIMINATE_COPY_RELOCS
2522 && !info->shared
0451c93c
MS		 2523 && h != NULL
2524 && h->dynindx != -1
f5385ebf
AM		 2525 && !h->non_got_ref
2526 && ((h->def_dynamic
2527 && !h->def_regular)
0451c93c
MS		 2528 || h->root.type == bfd_link_hash_undefweak
2529 || h->root.type == bfd_link_hash_undefined)))
947216bf
AM		 2530 {
2531 Elf_Internal_Rela outrel;
b34976b6 2532 bfd_boolean skip, relocate;
0451c93c 2533 asection *sreloc;
947216bf 2534 bfd_byte *loc;
a85d7ed0 2535
947216bf
AM		 2536 /* When generating a shared object, these relocations
2537 are copied into the output file to be resolved at run
2538 time. */
b34976b6
AM		 2539 skip = FALSE;
2540 relocate = FALSE;
a85d7ed0 2541
c629eae0
JJ		 2542 outrel.r_offset =
2543 _bfd_elf_section_offset (output_bfd, info, input_section,
2544 rel->r_offset);
2545 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2546 skip = TRUE;
0bb2d96a 2547 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2548 skip = TRUE, relocate = TRUE;
a85d7ed0 2549
947216bf
AM		 2550 outrel.r_offset += (input_section->output_section->vma
2551 + input_section->output_offset);
a85d7ed0 2552
947216bf 2553 if (skip)
0bb2d96a 2554 memset (&outrel, 0, sizeof outrel);
947216bf 2555 else if (h != NULL
0451c93c
MS		 2556 && h->dynindx != -1
2557 && (r_type == R_390_PC16
2558 || r_type == R_390_PC16DBL
2559 || r_type == R_390_PC32
2560 || r_type == R_390_PC32DBL
2561 || r_type == R_390_PC64
2562 || !info->shared
2563 || !info->symbolic
f5385ebf 2564 || !h->def_regular))
947216bf
AM		 2565 {
2566 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
27018c3f 2567 outrel.r_addend = rel->r_addend;
947216bf
AM		 2568 }
2569 else
2570 {
0451c93c 2571 /* This symbol is local, or marked to become local. */
90ced0dd 2572 outrel.r_addend = relocation + rel->r_addend;
b5727d75
MS		 2573 if (r_type == R_390_64)
2574 {
2575 relocate = TRUE;
2576 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
b5727d75
MS		 2577 }
2578 else
2579 {
2580 long sindx;
2581
90ced0dd 2582 if (bfd_is_abs_section (sec))
b5727d75
MS		 2583 sindx = 0;
2584 else if (sec == NULL || sec->owner == NULL)
2585 {
2586 bfd_set_error(bfd_error_bad_value);
2587 return FALSE;
2588 }
2589 else
2590 {
2591 asection *osec;
2592
2593 osec = sec->output_section;
2594 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 2595
2596 if (sindx == 0)
2597 {
2598 osec = htab->elf.text_index_section;
2599 sindx = elf_section_data (osec)->dynindx;
2600 }
2601 BFD_ASSERT (sindx != 0);
90ced0dd
MS		 2602
2603 /* We are turning this relocation into one
2604 against a section symbol, so subtract out
2605 the output section's address but not the
2606 offset of the input section in the output
2607 section. */
90ced0dd 2608 outrel.r_addend -= osec->vma;
b5727d75
MS		 2609 }
2610 outrel.r_info = ELF64_R_INFO (sindx, r_type);
b5727d75 2611 }
0451c93c 2612 }
a85d7ed0 2613
0451c93c
MS		 2614 sreloc = elf_section_data (input_section)->sreloc;
2615 if (sreloc == NULL)
2616 abort ();
2617
947216bf
AM		 2618 loc = sreloc->contents;
2619 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2620 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
a85d7ed0 2621
947216bf
AM		 2622 /* If this reloc is against an external symbol, we do
2623 not want to fiddle with the addend. Otherwise, we
2624 need to include the symbol value so that it becomes
2625 an addend for the dynamic reloc. */
2626 if (! relocate)
2627 continue;
2628 }
a85d7ed0 2629
947216bf 2630 break;
a85d7ed0 2631
69fc87f1
MS		 2632 /* Relocations for tls literal pool entries. */
2633 case R_390_TLS_IE64:
2634 if (info->shared)
2635 {
2636 Elf_Internal_Rela outrel;
2637 asection *sreloc;
2638 bfd_byte *loc;
2639
2640 outrel.r_offset = rel->r_offset
2641 + input_section->output_section->vma
2642 + input_section->output_offset;
2643 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2644 sreloc = elf_section_data (input_section)->sreloc;
2645 if (sreloc == NULL)
2646 abort ();
2647 loc = sreloc->contents;
2648 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2649 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2650 }
ae9a127f 2651 /* Fall through. */
69fc87f1
MS		 2652
2653 case R_390_TLS_GD64:
2654 case R_390_TLS_GOTIE64:
2655 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2656 tls_type = GOT_UNKNOWN;
2657 if (h == NULL && local_got_offsets)
2658 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2659 else if (h != NULL)
2660 {
2661 tls_type = elf_s390_hash_entry(h)->tls_type;
2662 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2663 r_type = R_390_TLS_LE64;
2664 }
2665 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2666 r_type = R_390_TLS_IE64;
2667
2668 if (r_type == R_390_TLS_LE64)
2669 {
2670 /* This relocation gets optimized away by the local exec
2671 access optimization. */
2672 BFD_ASSERT (! unresolved_reloc);
2673 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2674 contents + rel->r_offset);
2675 continue;
2676 }
2677
2678 if (htab->sgot == NULL)
2679 abort ();
2680
2681 if (h != NULL)
2682 off = h->got.offset;
2683 else
2684 {
2685 if (local_got_offsets == NULL)
2686 abort ();
2687
2688 off = local_got_offsets[r_symndx];
2689 }
2690
2691 emit_tls_relocs:
2692
2693 if ((off & 1) != 0)
2694 off &= ~1;
26e41594 2695 else
69fc87f1
MS		 2696 {
2697 Elf_Internal_Rela outrel;
2698 bfd_byte *loc;
2699 int dr_type, indx;
2700
2701 if (htab->srelgot == NULL)
2702 abort ();
2703
2704 outrel.r_offset = (htab->sgot->output_section->vma
2705 + htab->sgot->output_offset + off);
2706
2707 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2708 if (r_type == R_390_TLS_GD64)
2709 dr_type = R_390_TLS_DTPMOD;
2710 else
2711 dr_type = R_390_TLS_TPOFF;
2712 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2713 outrel.r_addend = relocation - dtpoff_base (info);
2714 else
2715 outrel.r_addend = 0;
2716 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2717 loc = htab->srelgot->contents;
2718 loc += htab->srelgot->reloc_count++
2719 * sizeof (Elf64_External_Rela);
2720 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2721
2722 if (r_type == R_390_TLS_GD64)
2723 {
2724 if (indx == 0)
2725 {
2726 BFD_ASSERT (! unresolved_reloc);
2727 bfd_put_64 (output_bfd,
2728 relocation - dtpoff_base (info),
2729 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2730 }
2731 else
2732 {
2733 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2734 outrel.r_offset += GOT_ENTRY_SIZE;
2735 outrel.r_addend = 0;
2736 htab->srelgot->reloc_count++;
2737 loc += sizeof (Elf64_External_Rela);
2738 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2739 }
2740 }
2741
2742 if (h != NULL)
2743 h->got.offset |= 1;
2744 else
2745 local_got_offsets[r_symndx] |= 1;
2746 }
2747
2748 if (off >= (bfd_vma) -2)
2749 abort ();
2750 if (r_type == ELF64_R_TYPE (rel->r_info))
2751 {
2752 relocation = htab->sgot->output_offset + off;
2753 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2754 relocation += htab->sgot->output_section->vma;
2755 unresolved_reloc = FALSE;
2756 }
2757 else
2758 {
2759 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2760 contents + rel->r_offset);
2761 continue;
2762 }
2763 break;
2764
2765 case R_390_TLS_GOTIE12:
bd1ea41b 2766 case R_390_TLS_GOTIE20:
69fc87f1
MS		 2767 case R_390_TLS_IEENT:
2768 if (h == NULL)
2769 {
2770 if (local_got_offsets == NULL)
2771 abort();
2772 off = local_got_offsets[r_symndx];
2773 if (info->shared)
2774 goto emit_tls_relocs;
2775 }
2776 else
2777 {
2778 off = h->got.offset;
2779 tls_type = elf_s390_hash_entry(h)->tls_type;
2780 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2781 goto emit_tls_relocs;
2782 }
2783
2784 if (htab->sgot == NULL)
2785 abort ();
2786
2787 BFD_ASSERT (! unresolved_reloc);
2788 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2789 htab->sgot->contents + off);
2790 relocation = htab->sgot->output_offset + off;
2791 if (r_type == R_390_TLS_IEENT)
2792 relocation += htab->sgot->output_section->vma;
2793 unresolved_reloc = FALSE;
2794 break;
2795
2796 case R_390_TLS_LDM64:
2797 if (! info->shared)
2798 /* The literal pool entry this relocation refers to gets ignored
2799 by the optimized code of the local exec model. Do nothing
2800 and the value will turn out zero. */
2801 continue;
2802
2803 if (htab->sgot == NULL)
2804 abort ();
2805
2806 off = htab->tls_ldm_got.offset;
2807 if (off & 1)
2808 off &= ~1;
2809 else
2810 {
2811 Elf_Internal_Rela outrel;
2812 bfd_byte *loc;
2813
2814 if (htab->srelgot == NULL)
2815 abort ();
2816
2817 outrel.r_offset = (htab->sgot->output_section->vma
2818 + htab->sgot->output_offset + off);
2819
2820 bfd_put_64 (output_bfd, 0,
2821 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2822 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2823 outrel.r_addend = 0;
2824 loc = htab->srelgot->contents;
2825 loc += htab->srelgot->reloc_count++
2826 * sizeof (Elf64_External_Rela);
2827 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2828 htab->tls_ldm_got.offset |= 1;
2829 }
2830 relocation = htab->sgot->output_offset + off;
26e41594 2831 unresolved_reloc = FALSE;
69fc87f1
MS		 2832 break;
2833
2834 case R_390_TLS_LE64:
2835 if (info->shared)
2836 {
2837 /* Linking a shared library with non-fpic code requires
2838 a R_390_TLS_TPOFF relocation. */
2839 Elf_Internal_Rela outrel;
2840 asection *sreloc;
2841 bfd_byte *loc;
2842 int indx;
2843
2844 outrel.r_offset = rel->r_offset
2845 + input_section->output_section->vma
2846 + input_section->output_offset;
2847 if (h != NULL && h->dynindx != -1)
2848 indx = h->dynindx;
2849 else
2850 indx = 0;
2851 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2852 if (indx == 0)
2853 outrel.r_addend = relocation - dtpoff_base (info);
2854 else
2855 outrel.r_addend = 0;
2856 sreloc = elf_section_data (input_section)->sreloc;
2857 if (sreloc == NULL)
2858 abort ();
2859 loc = sreloc->contents;
2860 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2861 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2862 }
2863 else
2864 {
2865 BFD_ASSERT (! unresolved_reloc);
2866 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2867 contents + rel->r_offset);
2868 }
2869 continue;
2870
2871 case R_390_TLS_LDO64:
36c10a8f 2872 if (info->shared)
69fc87f1
MS		 2873 relocation -= dtpoff_base (info);
2874 else
2875 /* When converting LDO to LE, we must negate. */
2876 relocation = -tpoff (info, relocation);
2877 break;
2878
2879 /* Relocations for tls instructions. */
2880 case R_390_TLS_LOAD:
2881 case R_390_TLS_GDCALL:
2882 case R_390_TLS_LDCALL:
2883 tls_type = GOT_UNKNOWN;
2884 if (h == NULL && local_got_offsets)
2885 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2886 else if (h != NULL)
2887 tls_type = elf_s390_hash_entry(h)->tls_type;
2888
2889 if (tls_type == GOT_TLS_GD)
2890 continue;
2891
2892 if (r_type == R_390_TLS_LOAD)
2893 {
2894 if (!info->shared && (h == NULL || h->dynindx == -1))
2895 {
2896 /* IE->LE transition. Four valid cases:
2897 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2898 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2899 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2900 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2901 unsigned int insn0, insn1, ry;
2902
2903 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2904 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2905 if (insn1 != 0x0004)
2906 invalid_tls_insn (input_bfd, input_section, rel);
2907 ry = 0;
2908 if ((insn0 & 0xff00f000) == 0xe3000000)
2909 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2910 ry = (insn0 & 0x000f0000);
2911 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2912 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2913 ry = (insn0 & 0x0000f000) << 4;
2914 else if ((insn0 & 0xff00f000) == 0xe300c000)
2915 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2916 ry = (insn0 & 0x000f0000);
2917 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2918 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2919 ry = (insn0 & 0x0000f000) << 4;
2920 else
2921 invalid_tls_insn (input_bfd, input_section, rel);
2922 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2923 insn1 = 0x000d;
2924 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2925 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2926 }
2927 }
2928 else if (r_type == R_390_TLS_GDCALL)
2929 {
2930 unsigned int insn0, insn1;
2931
2932 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2933 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2934 if ((insn0 & 0xffff0000) != 0xc0e50000)
2935 invalid_tls_insn (input_bfd, input_section, rel);
2936 if (!info->shared && (h == NULL || h->dynindx == -1))
2937 {
2938 /* GD->LE transition.
2939 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2940 insn0 = 0xc0040000;
2941 insn1 = 0x0000;
2942 }
2943 else
2944 {
2945 /* GD->IE transition.
2946 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2947 insn0 = 0xe322c000;
2948 insn1 = 0x0004;
2949 }
2950 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2951 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2952 }
2953 else if (r_type == R_390_TLS_LDCALL)
2954 {
2955 if (!info->shared)
2956 {
2957 unsigned int insn0, insn1;
2958
2959 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2960 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2961 if ((insn0 & 0xffff0000) != 0xc0e50000)
2962 invalid_tls_insn (input_bfd, input_section, rel);
2963 /* LD->LE transition.
2964 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2965 insn0 = 0xc0040000;
2966 insn1 = 0x0000;
2967 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2968 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2969 }
2970 }
2971 continue;
2972
947216bf
AM		 2973 default:
2974 break;
2975 }
a85d7ed0 2976
239e1f3a
AM		 2977 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2978 because such sections are not SEC_ALLOC and thus ld.so will
2979 not process them. */
0451c93c 2980 if (unresolved_reloc
239e1f3a 2981 && !((input_section->flags & SEC_DEBUGGING) != 0
f5385ebf 2982 && h->def_dynamic))
0451c93c 2983 (*_bfd_error_handler)
843fe662 2984 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 2985 input_bfd,
2986 input_section,
0451c93c 2987 (long) rel->r_offset,
843fe662 2988 howto->name,
0451c93c
MS		 2989 h->root.root.string);
2990
bd1ea41b
MS		 2991 if (r_type == R_390_20
2992 || r_type == R_390_GOT20
2993 || r_type == R_390_GOTPLT20
2994 || r_type == R_390_TLS_GOTIE20)
2995 {
2996 relocation += rel->r_addend;
2997 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
2998 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2999 contents, rel->r_offset,
3000 relocation, 0);
3001 }
3002 else
3003 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
a85d7ed0
NC		 3004 contents, rel->r_offset,
3005 relocation, rel->r_addend);
3006
3007 if (r != bfd_reloc_ok)
3008 {
0451c93c 3009 const char *name;
ec338859 3010
0451c93c
MS		 3011 if (h != NULL)
3012 name = h->root.root.string;
3013 else
a85d7ed0 3014 {
0451c93c
MS		 3015 name = bfd_elf_string_from_elf_section (input_bfd,
3016 symtab_hdr->sh_link,
3017 sym->st_name);
3018 if (name == NULL)
b34976b6 3019 return FALSE;
0451c93c
MS		 3020 if (*name == '\0')
3021 name = bfd_section_name (input_bfd, sec);
3022 }
ec338859 3023
0451c93c
MS		 3024 if (r == bfd_reloc_overflow)
3025 {
ec338859 3026
0451c93c 3027 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 3028 (info, (h ? &h->root : NULL), name, howto->name,
3029 (bfd_vma) 0, input_bfd, input_section,
3030 rel->r_offset)))
b34976b6 3031 return FALSE;
0451c93c
MS		 3032 }
3033 else
3034 {
3035 (*_bfd_error_handler)
d003868e
AM		 3036 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3037 input_bfd, input_section,
0451c93c 3038 (long) rel->r_offset, name, (int) r);
b34976b6 3039 return FALSE;
a85d7ed0
NC		 3040 }
3041 }
3042 }
3043
b34976b6 3044 return TRUE;
a85d7ed0
NC		 3045}
3046
3047/* Finish up dynamic symbol handling. We set the contents of various
3048 dynamic sections here. */
3049
b34976b6 3050static bfd_boolean
a85d7ed0
NC		 3051elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3052 bfd *output_bfd;
3053 struct bfd_link_info *info;
3054 struct elf_link_hash_entry *h;
3055 Elf_Internal_Sym *sym;
3056{
0451c93c 3057 struct elf_s390_link_hash_table *htab;
a85d7ed0 3058
0451c93c 3059 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 3060
3061 if (h->plt.offset != (bfd_vma) -1)
3062 {
a85d7ed0 3063 bfd_vma plt_index;
0451c93c
MS		 3064 bfd_vma got_offset;
3065 Elf_Internal_Rela rela;
947216bf 3066 bfd_byte *loc;
a85d7ed0
NC		 3067
3068 /* This symbol has an entry in the procedure linkage table. Set
947216bf 3069 it up. */
a85d7ed0 3070
0451c93c
MS		 3071 if (h->dynindx == -1
3072 || htab->splt == NULL
3073 || htab->sgotplt == NULL
3074 || htab->srelplt == NULL)
3075 abort ();
a85d7ed0 3076
99c79b2e 3077 /* Calc. index no.
947216bf 3078 Current offset - size first entry / entry size. */
a85d7ed0
NC		 3079 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3080
3081 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
947216bf 3082 addr & GOT addr. */
a85d7ed0
NC		 3083 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3084
3085 /* Fill in the blueprint of a PLT. */
0451c93c
MS		 3086 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3087 htab->splt->contents + h->plt.offset);
3088 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3089 htab->splt->contents + h->plt.offset + 4);
3090 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3091 htab->splt->contents + h->plt.offset + 8);
3092 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3093 htab->splt->contents + h->plt.offset + 12);
3094 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3095 htab->splt->contents + h->plt.offset + 16);
3096 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3097 htab->splt->contents + h->plt.offset + 20);
3098 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3099 htab->splt->contents + h->plt.offset + 24);
3100 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3101 htab->splt->contents + h->plt.offset + 28);
a85d7ed0
NC		 3102 /* Fixup the relative address to the GOT entry */
3103 bfd_put_32 (output_bfd,
0451c93c
MS		 3104 (htab->sgotplt->output_section->vma +
3105 htab->sgotplt->output_offset + got_offset
3106 - (htab->splt->output_section->vma + h->plt.offset))/2,
3107 htab->splt->contents + h->plt.offset + 2);
a85d7ed0
NC		 3108 /* Fixup the relative branch to PLT 0 */
3109 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3110 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
0451c93c 3111 htab->splt->contents + h->plt.offset + 24);
a85d7ed0
NC		 3112 /* Fixup offset into symbol table */
3113 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
0451c93c 3114 htab->splt->contents + h->plt.offset + 28);
a85d7ed0
NC		 3115
3116 /* Fill in the entry in the global offset table.
947216bf 3117 Points to instruction after GOT offset. */
a85d7ed0 3118 bfd_put_64 (output_bfd,
0451c93c
MS		 3119 (htab->splt->output_section->vma
3120 + htab->splt->output_offset
a85d7ed0
NC		 3121 + h->plt.offset
3122 + 14),
0451c93c 3123 htab->sgotplt->contents + got_offset);
a85d7ed0 3124
0451c93c
MS		 3125 /* Fill in the entry in the .rela.plt section. */
3126 rela.r_offset = (htab->sgotplt->output_section->vma
3127 + htab->sgotplt->output_offset
3128 + got_offset);
3129 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3130 rela.r_addend = 0;
947216bf 3131 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
0451c93c 3132 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0 3133
f5385ebf 3134 if (!h->def_regular)
a85d7ed0
NC		 3135 {
3136 /* Mark the symbol as undefined, rather than as defined in
0451c93c
MS		 3137 the .plt section. Leave the value alone. This is a clue
3138 for the dynamic linker, to make function pointer
3139 comparisons work between an application and shared
3140 library. */
a85d7ed0
NC		 3141 sym->st_shndx = SHN_UNDEF;
3142 }
3143 }
3144
69fc87f1
MS		 3145 if (h->got.offset != (bfd_vma) -1
3146 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3147 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3148 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
a85d7ed0 3149 {
a85d7ed0 3150 Elf_Internal_Rela rela;
947216bf 3151 bfd_byte *loc;
a85d7ed0
NC		 3152
3153 /* This symbol has an entry in the global offset table. Set it
947216bf 3154 up. */
0451c93c
MS		 3155 if (htab->sgot == NULL || htab->srelgot == NULL)
3156 abort ();
a85d7ed0 3157
0451c93c
MS		 3158 rela.r_offset = (htab->sgot->output_section->vma
3159 + htab->sgot->output_offset
dc810e39 3160 + (h->got.offset &~ (bfd_vma) 1));
a85d7ed0
NC		 3161
3162 /* If this is a static link, or it is a -Bsymbolic link and the
3163 symbol is defined locally or was forced to be local because
3164 of a version file, we just want to emit a RELATIVE reloc.
3165 The entry in the global offset table will already have been
3166 initialized in the relocate_section function. */
0451c93c
MS		 3167 if (info->shared
3168 && (info->symbolic
3169 || h->dynindx == -1
f5385ebf
AM		 3170 || h->forced_local)
3171 && h->def_regular)
947216bf 3172 {
0451c93c 3173 BFD_ASSERT((h->got.offset & 1) != 0);
947216bf
AM		 3174 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3175 rela.r_addend = (h->root.u.def.value
3176 + h->root.u.def.section->output_section->vma
3177 + h->root.u.def.section->output_offset);
3178 }
a85d7ed0
NC		 3179 else
3180 {
3181 BFD_ASSERT((h->got.offset & 1) == 0);
0451c93c 3182 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
a85d7ed0 3183 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
947216bf
AM		 3184 rela.r_addend = 0;
3185 }
a85d7ed0 3186
947216bf
AM		 3187 loc = htab->srelgot->contents;
3188 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3189 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3190 }
3191
f5385ebf 3192 if (h->needs_copy)
a85d7ed0 3193 {
a85d7ed0 3194 Elf_Internal_Rela rela;
947216bf 3195 bfd_byte *loc;
a85d7ed0
NC		 3196
3197 /* This symbols needs a copy reloc. Set it up. */
3198
0451c93c
MS		 3199 if (h->dynindx == -1
3200 || (h->root.type != bfd_link_hash_defined
3201 && h->root.type != bfd_link_hash_defweak)
3202 || htab->srelbss == NULL)
3203 abort ();
a85d7ed0
NC		 3204
3205 rela.r_offset = (h->root.u.def.value
3206 + h->root.u.def.section->output_section->vma
3207 + h->root.u.def.section->output_offset);
3208 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3209 rela.r_addend = 0;
947216bf
AM		 3210 loc = htab->srelbss->contents;
3211 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3212 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3213 }
3214
3215 /* Mark some specially defined symbols as absolute. */
3216 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
22edb2f1
RS		 3217 || h == htab->elf.hgot
3218 || h == htab->elf.hplt)
a85d7ed0
NC		 3219 sym->st_shndx = SHN_ABS;
3220
b34976b6 3221 return TRUE;
a85d7ed0
NC		 3222}
3223
0451c93c
MS		 3224/* Used to decide how to sort relocs in an optimal manner for the
3225 dynamic linker, before writing them out. */
3226
3227static enum elf_reloc_type_class
3228elf_s390_reloc_type_class (rela)
3229 const Elf_Internal_Rela *rela;
3230{
3231 switch ((int) ELF64_R_TYPE (rela->r_info))
3232 {
3233 case R_390_RELATIVE:
3234 return reloc_class_relative;
3235 case R_390_JMP_SLOT:
3236 return reloc_class_plt;
3237 case R_390_COPY:
3238 return reloc_class_copy;
3239 default:
3240 return reloc_class_normal;
3241 }
3242}
3243
a85d7ed0
NC		 3244/* Finish up the dynamic sections. */
3245
b34976b6 3246static bfd_boolean
a85d7ed0
NC		 3247elf_s390_finish_dynamic_sections (output_bfd, info)
3248 bfd *output_bfd;
3249 struct bfd_link_info *info;
3250{
0451c93c 3251 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 3252 bfd *dynobj;
3253 asection *sdyn;
a85d7ed0 3254
0451c93c
MS		 3255 htab = elf_s390_hash_table (info);
3256 dynobj = htab->elf.dynobj;
a85d7ed0
NC		 3257 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3258
0451c93c 3259 if (htab->elf.dynamic_sections_created)
a85d7ed0 3260 {
a85d7ed0
NC		 3261 Elf64_External_Dyn *dyncon, *dynconend;
3262
0451c93c
MS		 3263 if (sdyn == NULL || htab->sgot == NULL)
3264 abort ();
a85d7ed0
NC		 3265
3266 dyncon = (Elf64_External_Dyn *) sdyn->contents;
eea6121a 3267 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
a85d7ed0
NC		 3268 for (; dyncon < dynconend; dyncon++)
3269 {
3270 Elf_Internal_Dyn dyn;
a85d7ed0 3271 asection *s;
ec338859 3272
a85d7ed0 3273 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
ec338859 3274
a85d7ed0
NC		 3275 switch (dyn.d_tag)
3276 {
3277 default:
0451c93c 3278 continue;
ec338859 3279
a85d7ed0 3280 case DT_PLTGOT:
0451c93c
MS		 3281 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3282 break;
ec338859 3283
a85d7ed0 3284 case DT_JMPREL:
0451c93c 3285 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
a85d7ed0 3286 break;
ec338859 3287
a85d7ed0 3288 case DT_PLTRELSZ:
0451c93c 3289 s = htab->srelplt->output_section;
eea6121a 3290 dyn.d_un.d_val = s->size;
a85d7ed0 3291 break;
ec338859 3292
a85d7ed0
NC		 3293 case DT_RELASZ:
3294 /* The procedure linkage table relocs (DT_JMPREL) should
3295 not be included in the overall relocs (DT_RELA).
3296 Therefore, we override the DT_RELASZ entry here to
3297 make it not include the JMPREL relocs. Since the
3298 linker script arranges for .rela.plt to follow all
3299 other relocation sections, we don't have to worry
3300 about changing the DT_RELA entry. */
0451c93c 3301 s = htab->srelplt->output_section;
eea6121a 3302 dyn.d_un.d_val -= s->size;
a85d7ed0
NC		 3303 break;
3304 }
0451c93c
MS		 3305
3306 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
a85d7ed0
NC		 3307 }
3308
3309 /* Fill in the special first entry in the procedure linkage table. */
eea6121a 3310 if (htab->splt && htab->splt->size > 0)
a85d7ed0
NC		 3311 {
3312 /* fill in blueprint for plt 0 entry */
0451c93c
MS		 3313 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3314 htab->splt->contents );
3315 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3316 htab->splt->contents +4 );
3317 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3318 htab->splt->contents +12 );
3319 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3320 htab->splt->contents +16 );
3321 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3322 htab->splt->contents +20 );
3323 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3324 htab->splt->contents + 24);
3325 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3326 htab->splt->contents + 28 );
a85d7ed0
NC		 3327 /* Fixup relative address to start of GOT */
3328 bfd_put_32 (output_bfd,
0451c93c
MS		 3329 (htab->sgotplt->output_section->vma +
3330 htab->sgotplt->output_offset
3331 - htab->splt->output_section->vma - 6)/2,
3332 htab->splt->contents + 8);
a85d7ed0 3333 }
0451c93c
MS		 3334 elf_section_data (htab->splt->output_section)
3335 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
a85d7ed0
NC		 3336 }
3337
0451c93c 3338 if (htab->sgotplt)
a85d7ed0 3339 {
0451c93c 3340 /* Fill in the first three entries in the global offset table. */
eea6121a 3341 if (htab->sgotplt->size > 0)
0451c93c
MS		 3342 {
3343 bfd_put_64 (output_bfd,
3344 (sdyn == NULL ? (bfd_vma) 0
3345 : sdyn->output_section->vma + sdyn->output_offset),
3346 htab->sgotplt->contents);
3347 /* One entry for shared object struct ptr. */
3348 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3349 /* One entry for _dl_runtime_resolve. */
3350 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3351 }
a85d7ed0 3352
0451c93c
MS		 3353 elf_section_data (htab->sgot->output_section)
3354 ->this_hdr.sh_entsize = 8;
3355 }
b34976b6 3356 return TRUE;
a85d7ed0
NC		 3357}
3358
4c45e5c9
JJ		 3359/* Return address for Ith PLT stub in section PLT, for relocation REL
3360 or (bfd_vma) -1 if it should not be included. */
3361
3362static bfd_vma
3363elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3364 const arelent *rel ATTRIBUTE_UNUSED)
3365{
3366 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3367}
3368
3369
ae9a127f
NC		 3370/* Why was the hash table entry size definition changed from
3371 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3372 this is the only reason for the s390_elf64_size_info structure. */
a85d7ed0
NC		 3373
3374const struct elf_size_info s390_elf64_size_info =
3375{
3376 sizeof (Elf64_External_Ehdr),
3377 sizeof (Elf64_External_Phdr),
3378 sizeof (Elf64_External_Shdr),
3379 sizeof (Elf64_External_Rel),
3380 sizeof (Elf64_External_Rela),
3381 sizeof (Elf64_External_Sym),
3382 sizeof (Elf64_External_Dyn),
3383 sizeof (Elf_External_Note),
ae9a127f
NC		 3384 8, /* hash-table entry size. */
3385 1, /* internal relocations per external relocations. */
3386 64, /* arch_size. */
45d6a902 3387 3, /* log_file_align. */
a85d7ed0
NC		 3388 ELFCLASS64, EV_CURRENT,
3389 bfd_elf64_write_out_phdrs,
3390 bfd_elf64_write_shdrs_and_ehdr,
1489a3a0 3391 bfd_elf64_checksum_contents,
a85d7ed0 3392 bfd_elf64_write_relocs,
73ff0d56 3393 bfd_elf64_swap_symbol_in,
a85d7ed0
NC		 3394 bfd_elf64_swap_symbol_out,
3395 bfd_elf64_slurp_reloc_table,
3396 bfd_elf64_slurp_symbol_table,
3397 bfd_elf64_swap_dyn_in,
3398 bfd_elf64_swap_dyn_out,
947216bf
AM		 3399 bfd_elf64_swap_reloc_in,
3400 bfd_elf64_swap_reloc_out,
3401 bfd_elf64_swap_reloca_in,
3402 bfd_elf64_swap_reloca_out
a85d7ed0
NC		 3403};
3404
3405#define TARGET_BIG_SYM bfd_elf64_s390_vec
3406#define TARGET_BIG_NAME "elf64-s390"
3407#define ELF_ARCH bfd_arch_s390
3408#define ELF_MACHINE_CODE EM_S390
3409#define ELF_MACHINE_ALT1 EM_S390_OLD
3410#define ELF_MAXPAGESIZE 0x1000
3411
3412#define elf_backend_size_info s390_elf64_size_info
3413
3414#define elf_backend_can_gc_sections 1
51b64d56 3415#define elf_backend_can_refcount 1
a85d7ed0
NC		 3416#define elf_backend_want_got_plt 1
3417#define elf_backend_plt_readonly 1
3418#define elf_backend_want_plt_sym 0
3419#define elf_backend_got_header_size 24
b491616a 3420#define elf_backend_rela_normal 1
a85d7ed0
NC		 3421
3422#define elf_info_to_howto elf_s390_info_to_howto
3423
a85d7ed0
NC		 3424#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3425#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3426#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
157090f7 3427#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
a85d7ed0
NC		 3428
3429#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3430#define elf_backend_check_relocs elf_s390_check_relocs
0451c93c
MS		 3431#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3432#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
a85d7ed0
NC		 3433#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3434#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3435#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3436#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
0451c93c 3437#define elf_backend_reloc_type_class elf_s390_reloc_type_class
a85d7ed0
NC		 3438#define elf_backend_relocate_section elf_s390_relocate_section
3439#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
74541ad4 3440#define elf_backend_init_index_section _bfd_elf_init_1_index_section
29c2fb7c 3441#define elf_backend_reloc_type_class elf_s390_reloc_type_class
4c45e5c9 3442#define elf_backend_plt_sym_val elf_s390_plt_sym_val
a85d7ed0 3443
69fc87f1
MS		 3444#define bfd_elf64_mkobject elf_s390_mkobject
3445#define elf_backend_object_p elf_s390_object_p
a85d7ed0
NC		 3446
3447#include "elf64-target.h"
GDB Binutils - Deliverables
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