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[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
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a85d7ed0 1/* IBM S/390-specific support for 32-bit ELF
a779acda 2 Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
a85d7ed0
NC		 3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22#include "bfd.h"
23#include "sysdep.h"
24#include "bfdlink.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
27
28static reloc_howto_type *elf_s390_reloc_type_lookup
29 PARAMS ((bfd *, bfd_reloc_code_real_type));
30static void elf_s390_info_to_howto
31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
b34976b6 32static bfd_boolean elf_s390_is_local_label_name
0451c93c
MS		 33 PARAMS ((bfd *, const char *));
34static struct bfd_hash_entry *link_hash_newfunc
a85d7ed0
NC		 35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36static struct bfd_link_hash_table *elf_s390_link_hash_table_create
37 PARAMS ((bfd *));
b34976b6 38static bfd_boolean create_got_section
0451c93c 39 PARAMS((bfd *, struct bfd_link_info *));
b34976b6 40static bfd_boolean elf_s390_create_dynamic_sections
0451c93c
MS		 41 PARAMS((bfd *, struct bfd_link_info *));
42static void elf_s390_copy_indirect_symbol
b48fa14c
AM		 43 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
44 struct elf_link_hash_entry *));
b34976b6 45static bfd_boolean elf_s390_check_relocs
a85d7ed0
NC		 46 PARAMS ((bfd *, struct bfd_link_info *, asection *,
47 const Elf_Internal_Rela *));
5a65713f 48static asection *elf_s390_gc_mark_hook
1e2f5b6e 49 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
0451c93c 50 struct elf_link_hash_entry *, Elf_Internal_Sym *));
b34976b6 51static bfd_boolean elf_s390_gc_sweep_hook
5a65713f
AJ		 52 PARAMS ((bfd *, struct bfd_link_info *, asection *,
53 const Elf_Internal_Rela *));
5236c819
MS		 54struct elf_s390_link_hash_entry;
55static void elf_s390_adjust_gotplt
56 PARAMS ((struct elf_s390_link_hash_entry *));
b34976b6 57static bfd_boolean elf_s390_adjust_dynamic_symbol
a85d7ed0 58 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
b34976b6 59static bfd_boolean allocate_dynrelocs
0451c93c 60 PARAMS ((struct elf_link_hash_entry *, PTR));
b34976b6 61static bfd_boolean readonly_dynrelocs
0451c93c 62 PARAMS ((struct elf_link_hash_entry *, PTR));
b34976b6 63static bfd_boolean elf_s390_size_dynamic_sections
a85d7ed0 64 PARAMS ((bfd *, struct bfd_link_info *));
b34976b6 65static bfd_boolean elf_s390_relocate_section
a85d7ed0
NC		 66 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
67 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
b34976b6 68static bfd_boolean elf_s390_finish_dynamic_symbol
a85d7ed0
NC		 69 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
70 Elf_Internal_Sym *));
0451c93c
MS		 71static enum elf_reloc_type_class elf_s390_reloc_type_class
72 PARAMS ((const Elf_Internal_Rela *));
b34976b6 73static bfd_boolean elf_s390_finish_dynamic_sections
a85d7ed0 74 PARAMS ((bfd *, struct bfd_link_info *));
69fc87f1
MS		 75static bfd_boolean elf_s390_mkobject
76 PARAMS ((bfd *));
b34976b6
AM		 77static bfd_boolean elf_s390_object_p
78 PARAMS ((bfd *));
79static bfd_boolean elf_s390_grok_prstatus
80 PARAMS ((bfd *, Elf_Internal_Note *));
69fc87f1
MS		 81static int elf_s390_tls_transition
82 PARAMS ((struct bfd_link_info *, int, int));
83static bfd_reloc_status_type s390_tls_reloc
84 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
85static bfd_vma dtpoff_base
86 PARAMS ((struct bfd_link_info *));
87static bfd_vma tpoff
88 PARAMS ((struct bfd_link_info *, bfd_vma));
89static void invalid_tls_insn
90 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
a85d7ed0 91
a85d7ed0
NC		 92#include "elf/s390.h"
93
94/* The relocation "howto" table. */
95
96static reloc_howto_type elf_howto_table[] =
97{
98 HOWTO (R_390_NONE, /* type */
99 0, /* rightshift */
100 0, /* size (0 = byte, 1 = short, 2 = long) */
101 0, /* bitsize */
b34976b6 102 FALSE, /* pc_relative */
a85d7ed0
NC		 103 0, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_390_NONE", /* name */
b34976b6 107 FALSE, /* partial_inplace */
a85d7ed0
NC		 108 0, /* src_mask */
109 0, /* dst_mask */
b34976b6
AM		 110 FALSE), /* pcrel_offset */
111
5236c819
MS		 112 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
114 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
115 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
116 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
118 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
120 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
122 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
123 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
124 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
126 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
128 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
130 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
132 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
134 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
136 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
138 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
140 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
142 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
144 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
146 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
148 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
150 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
152 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
154 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
155 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
156 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
157 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
158 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, 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 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
163 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
164 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
165 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
167 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
169 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
170 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
172 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
174 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
176 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
69fc87f1
MS		 177 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
178 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
179 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
180 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
181 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
182 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
183 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
184 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
185 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
186 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
187 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
188 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
189 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
190 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
191 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
192 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
193 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
194 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
196 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
197 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
199 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
200 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
201 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
202 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
203 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
204 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
205 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
206 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
207 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
208 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
209 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
210 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
a85d7ed0
NC		 211};
212
213/* GNU extension to record C++ vtable hierarchy. */
214static reloc_howto_type elf32_s390_vtinherit_howto =
b34976b6 215 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
a85d7ed0 216static reloc_howto_type elf32_s390_vtentry_howto =
b34976b6 217 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
a85d7ed0
NC		 218
219static reloc_howto_type *
220elf_s390_reloc_type_lookup (abfd, code)
221 bfd *abfd ATTRIBUTE_UNUSED;
222 bfd_reloc_code_real_type code;
223{
ec338859 224 switch (code)
0451c93c
MS		 225 {
226 case BFD_RELOC_NONE:
227 return &elf_howto_table[(int) R_390_NONE];
228 case BFD_RELOC_8:
229 return &elf_howto_table[(int) R_390_8];
230 case BFD_RELOC_390_12:
231 return &elf_howto_table[(int) R_390_12];
232 case BFD_RELOC_16:
233 return &elf_howto_table[(int) R_390_16];
234 case BFD_RELOC_32:
235 return &elf_howto_table[(int) R_390_32];
236 case BFD_RELOC_CTOR:
237 return &elf_howto_table[(int) R_390_32];
238 case BFD_RELOC_32_PCREL:
239 return &elf_howto_table[(int) R_390_PC32];
240 case BFD_RELOC_390_GOT12:
241 return &elf_howto_table[(int) R_390_GOT12];
242 case BFD_RELOC_32_GOT_PCREL:
243 return &elf_howto_table[(int) R_390_GOT32];
244 case BFD_RELOC_390_PLT32:
245 return &elf_howto_table[(int) R_390_PLT32];
246 case BFD_RELOC_390_COPY:
247 return &elf_howto_table[(int) R_390_COPY];
248 case BFD_RELOC_390_GLOB_DAT:
249 return &elf_howto_table[(int) R_390_GLOB_DAT];
250 case BFD_RELOC_390_JMP_SLOT:
251 return &elf_howto_table[(int) R_390_JMP_SLOT];
252 case BFD_RELOC_390_RELATIVE:
253 return &elf_howto_table[(int) R_390_RELATIVE];
254 case BFD_RELOC_32_GOTOFF:
5236c819 255 return &elf_howto_table[(int) R_390_GOTOFF32];
0451c93c
MS		 256 case BFD_RELOC_390_GOTPC:
257 return &elf_howto_table[(int) R_390_GOTPC];
258 case BFD_RELOC_390_GOT16:
259 return &elf_howto_table[(int) R_390_GOT16];
260 case BFD_RELOC_16_PCREL:
261 return &elf_howto_table[(int) R_390_PC16];
262 case BFD_RELOC_390_PC16DBL:
263 return &elf_howto_table[(int) R_390_PC16DBL];
264 case BFD_RELOC_390_PLT16DBL:
265 return &elf_howto_table[(int) R_390_PLT16DBL];
befc3abb
MS		 266 case BFD_RELOC_390_PC32DBL:
267 return &elf_howto_table[(int) R_390_PC32DBL];
268 case BFD_RELOC_390_PLT32DBL:
269 return &elf_howto_table[(int) R_390_PLT32DBL];
270 case BFD_RELOC_390_GOTPCDBL:
271 return &elf_howto_table[(int) R_390_GOTPCDBL];
272 case BFD_RELOC_390_GOTENT:
273 return &elf_howto_table[(int) R_390_GOTENT];
5236c819
MS		 274 case BFD_RELOC_16_GOTOFF:
275 return &elf_howto_table[(int) R_390_GOTOFF16];
276 case BFD_RELOC_390_GOTPLT12:
277 return &elf_howto_table[(int) R_390_GOTPLT12];
278 case BFD_RELOC_390_GOTPLT16:
279 return &elf_howto_table[(int) R_390_GOTPLT16];
280 case BFD_RELOC_390_GOTPLT32:
281 return &elf_howto_table[(int) R_390_GOTPLT32];
282 case BFD_RELOC_390_GOTPLTENT:
283 return &elf_howto_table[(int) R_390_GOTPLTENT];
284 case BFD_RELOC_390_PLTOFF16:
285 return &elf_howto_table[(int) R_390_PLTOFF16];
286 case BFD_RELOC_390_PLTOFF32:
287 return &elf_howto_table[(int) R_390_PLTOFF32];
69fc87f1
MS		 288 case BFD_RELOC_390_TLS_LOAD:
289 return &elf_howto_table[(int) R_390_TLS_LOAD];
290 case BFD_RELOC_390_TLS_GDCALL:
291 return &elf_howto_table[(int) R_390_TLS_GDCALL];
292 case BFD_RELOC_390_TLS_LDCALL:
293 return &elf_howto_table[(int) R_390_TLS_LDCALL];
294 case BFD_RELOC_390_TLS_GD32:
295 return &elf_howto_table[(int) R_390_TLS_GD32];
296 case BFD_RELOC_390_TLS_GOTIE12:
297 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
298 case BFD_RELOC_390_TLS_GOTIE32:
299 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
300 case BFD_RELOC_390_TLS_LDM32:
301 return &elf_howto_table[(int) R_390_TLS_LDM32];
302 case BFD_RELOC_390_TLS_IE32:
303 return &elf_howto_table[(int) R_390_TLS_IE32];
304 case BFD_RELOC_390_TLS_IEENT:
305 return &elf_howto_table[(int) R_390_TLS_IEENT];
306 case BFD_RELOC_390_TLS_LE32:
307 return &elf_howto_table[(int) R_390_TLS_LE32];
308 case BFD_RELOC_390_TLS_LDO32:
309 return &elf_howto_table[(int) R_390_TLS_LDO32];
310 case BFD_RELOC_390_TLS_DTPMOD:
311 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
312 case BFD_RELOC_390_TLS_DTPOFF:
313 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
314 case BFD_RELOC_390_TLS_TPOFF:
315 return &elf_howto_table[(int) R_390_TLS_TPOFF];
0451c93c
MS		 316 case BFD_RELOC_VTABLE_INHERIT:
317 return &elf32_s390_vtinherit_howto;
318 case BFD_RELOC_VTABLE_ENTRY:
319 return &elf32_s390_vtentry_howto;
320 default:
321 break;
322 }
a85d7ed0
NC		 323 return 0;
324}
325
326/* We need to use ELF32_R_TYPE so we have our own copy of this function,
327 and elf32-s390.c has its own copy. */
328
329static void
330elf_s390_info_to_howto (abfd, cache_ptr, dst)
331 bfd *abfd ATTRIBUTE_UNUSED;
332 arelent *cache_ptr;
333 Elf_Internal_Rela *dst;
334{
335 switch (ELF32_R_TYPE(dst->r_info))
336 {
337 case R_390_GNU_VTINHERIT:
338 cache_ptr->howto = &elf32_s390_vtinherit_howto;
339 break;
340
341 case R_390_GNU_VTENTRY:
342 cache_ptr->howto = &elf32_s390_vtentry_howto;
343 break;
344
345 default:
346 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
347 cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
dc810e39 348 }
a85d7ed0
NC		 349}
350
69fc87f1
MS		 351/* A relocation function which doesn't do anything. */
352static bfd_reloc_status_type
353s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
354 output_bfd, error_message)
355 bfd *abfd ATTRIBUTE_UNUSED;
356 arelent *reloc_entry;
357 asymbol *symbol ATTRIBUTE_UNUSED;
358 PTR data ATTRIBUTE_UNUSED;
359 asection *input_section;
360 bfd *output_bfd;
361 char **error_message ATTRIBUTE_UNUSED;
362{
363 if (output_bfd)
364 reloc_entry->address += input_section->output_offset;
365 return bfd_reloc_ok;
366}
367
b34976b6 368static bfd_boolean
a85d7ed0
NC		 369elf_s390_is_local_label_name (abfd, name)
370 bfd *abfd;
371 const char *name;
372{
373 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
b34976b6 374 return TRUE;
a85d7ed0
NC		 375
376 return _bfd_elf_is_local_label_name (abfd, name);
377}
378
379/* Functions for the 390 ELF linker. */
380
381/* The name of the dynamic interpreter. This is put in the .interp
382 section. */
383
384#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
385
a85d7ed0
NC		 386/* The size in bytes of the first entry in the procedure linkage table. */
387#define PLT_FIRST_ENTRY_SIZE 32
388/* The size in bytes of an entry in the procedure linkage table. */
dc810e39 389#define PLT_ENTRY_SIZE 32
a85d7ed0
NC		 390
391#define GOT_ENTRY_SIZE 4
392
393/* The first three entries in a procedure linkage table are reserved,
394 and the initial contents are unimportant (we zero them out).
395 Subsequent entries look like this. See the SVR4 ABI 386
396 supplement to see how this works. */
397
398/* For the s390, simple addr offset can only be 0 - 4096.
399 To use the full 2 GB address space, several instructions
400 are needed to load an address in a register and execute
401 a branch( or just saving the address)
402
dc810e39 403 Furthermore, only r 0 and 1 are free to use!!! */
a85d7ed0
NC		 404
405/* The first 3 words in the GOT are then reserved.
406 Word 0 is the address of the dynamic table.
407 Word 1 is a pointer to a structure describing the object
408 Word 2 is used to point to the loader entry address.
409
410 The code for position independand PLT entries looks like this:
411
412 r12 holds addr of the current GOT at entry to the PLT
413
414 The GOT holds the address in the PLT to be executed.
415 The loader then gets:
416 24(15) = Pointer to the structure describing the object.
dc810e39 417 28(15) = Offset in symbol table
a85d7ed0
NC		 418
419 The loader must then find the module where the function is
420 and insert the address in the GOT.
421
422 Note: 390 can only address +- 64 K relative.
423 We check if offset > 65536, then make a relative branch -64xxx
424 back to a previous defined branch
425
426PLT1: BASR 1,0 # 2 bytes
427 L 1,22(1) # 4 bytes Load offset in GOT in r 1
428 L 1,(1,12) # 4 bytes Load address from GOT in r1
429 BCR 15,1 # 2 bytes Jump to address
430RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
431 L 1,14(1) # 4 bytes Load offset in symol table in r1
432 BRC 15,-x # 4 bytes Jump to start of PLT
433 .word 0 # 2 bytes filler
434 .long ? # 4 bytes offset in GOT
435 .long ? # 4 bytes offset into symbol table
436
437 This was the general case. There are two additional, optimizes PLT
438 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
439 First the one for GOT offsets < 4096:
440
441PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
442 BCR 15,1 # 2 bytes Jump to address
443 .word 0,0,0 # 6 bytes filler
444RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
445 L 1,14(1) # 4 bytes Load offset in symbol table in r1
446 BRC 15,-x # 4 bytes Jump to start of PLT
447 .word 0,0,0 # 6 bytes filler
448 .long ? # 4 bytes offset into symbol table
449
450 Second the one for GOT offsets < 32768:
451
452PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
453 L 1,(1,12) # 4 bytes Load address from GOT to r1
454 BCR 15,1 # 2 bytes Jump to address
455 .word 0 # 2 bytes filler
456RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
457 L 1,14(1) # 4 bytes Load offset in symbol table in r1
458 BRC 15,-x # 4 bytes Jump to start of PLT
459 .word 0,0,0 # 6 bytes filler
460 .long ? # 4 bytes offset into symbol table
461
462Total = 32 bytes per PLT entry
463
464 The code for static build PLT entries looks like this:
465
466PLT1: BASR 1,0 # 2 bytes
467 L 1,22(1) # 4 bytes Load address of GOT entry
468 L 1,0(0,1) # 4 bytes Load address from GOT in r1
469 BCR 15,1 # 2 bytes Jump to address
470RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
471 L 1,14(1) # 4 bytes Load offset in symbol table in r1
472 BRC 15,-x # 4 bytes Jump to start of PLT
473 .word 0 # 2 bytes filler
474 .long ? # 4 bytes address of GOT entry
475 .long ? # 4 bytes offset into symbol table */
476
477#define PLT_PIC_ENTRY_WORD0 0x0d105810
478#define PLT_PIC_ENTRY_WORD1 0x10165811
479#define PLT_PIC_ENTRY_WORD2 0xc00007f1
480#define PLT_PIC_ENTRY_WORD3 0x0d105810
481#define PLT_PIC_ENTRY_WORD4 0x100ea7f4
482
483#define PLT_PIC12_ENTRY_WORD0 0x5810c000
484#define PLT_PIC12_ENTRY_WORD1 0x07f10000
485#define PLT_PIC12_ENTRY_WORD2 0x00000000
486#define PLT_PIC12_ENTRY_WORD3 0x0d105810
487#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
488
489#define PLT_PIC16_ENTRY_WORD0 0xa7180000
490#define PLT_PIC16_ENTRY_WORD1 0x5811c000
491#define PLT_PIC16_ENTRY_WORD2 0x07f10000
492#define PLT_PIC16_ENTRY_WORD3 0x0d105810
493#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
494
495#define PLT_ENTRY_WORD0 0x0d105810
496#define PLT_ENTRY_WORD1 0x10165810
497#define PLT_ENTRY_WORD2 0x100007f1
498#define PLT_ENTRY_WORD3 0x0d105810
499#define PLT_ENTRY_WORD4 0x100ea7f4
500
501/* The first PLT entry pushes the offset into the symbol table
502 from R1 onto the stack at 8(15) and the loader object info
503 at 12(15), loads the loader address in R1 and jumps to it. */
504
505/* The first entry in the PLT for PIC code:
506
507PLT0:
508 ST 1,28(15) # R1 has offset into symbol table
509 L 1,4(12) # Get loader ino(object struct address)
dc810e39 510 ST 1,24(15) # Store address
a85d7ed0
NC		 511 L 1,8(12) # Entry address of loader in R1
512 BR 1 # Jump to loader
513
514 The first entry in the PLT for static code:
515
516PLT0:
517 ST 1,28(15) # R1 has offset into symbol table
518 BASR 1,0
519 L 1,18(0,1) # Get address of GOT
520 MVC 24(4,15),4(1) # Move loader ino to stack
521 L 1,8(1) # Get address of loader
522 BR 1 # Jump to loader
523 .word 0 # filler
524 .long got # address of GOT */
525
526#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
527#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
528#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
529#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
530#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
531
532#define PLT_FIRST_ENTRY_WORD0 0x5010f01c
533#define PLT_FIRST_ENTRY_WORD1 0x0d105810
534#define PLT_FIRST_ENTRY_WORD2 0x1012D203
535#define PLT_FIRST_ENTRY_WORD3 0xf0181004
536#define PLT_FIRST_ENTRY_WORD4 0x58101008
537#define PLT_FIRST_ENTRY_WORD5 0x07f10000
538
539/* The s390 linker needs to keep track of the number of relocs that it
0451c93c
MS		 540 decides to copy as dynamic relocs in check_relocs for each symbol.
541 This is so that it can later discard them if they are found to be
542 unnecessary. We store the information in a field extending the
543 regular ELF linker hash table. */
a85d7ed0 544
0451c93c 545struct elf_s390_dyn_relocs
a85d7ed0 546{
0451c93c
MS		 547 struct elf_s390_dyn_relocs *next;
548
549 /* The input section of the reloc. */
550 asection *sec;
551
552 /* Total number of relocs copied for the input section. */
a85d7ed0 553 bfd_size_type count;
0451c93c
MS		 554
555 /* Number of pc-relative relocs copied for the input section. */
556 bfd_size_type pc_count;
a85d7ed0
NC		 557};
558
559/* s390 ELF linker hash entry. */
560
561struct elf_s390_link_hash_entry
562{
0451c93c 563 struct elf_link_hash_entry elf;
a85d7ed0 564
0451c93c
MS		 565 /* Track dynamic relocs copied for this symbol. */
566 struct elf_s390_dyn_relocs *dyn_relocs;
5236c819
MS		 567
568 /* Number of GOTPLT references for a function. */
569 bfd_signed_vma gotplt_refcount;
69fc87f1
MS		 570
571#define GOT_UNKNOWN 0
572#define GOT_NORMAL 1
573#define GOT_TLS_GD 2
574#define GOT_TLS_IE 3
575#define GOT_TLS_IE_NLT 4
576 unsigned char tls_type;
a85d7ed0
NC		 577};
578
69fc87f1
MS		 579#define elf_s390_hash_entry(ent) \
580 ((struct elf_s390_link_hash_entry *)(ent))
581
582struct elf_s390_obj_tdata
583{
584 struct elf_obj_tdata root;
585
586 /* tls_type for each local got entry. */
587 char *local_got_tls_type;
588};
589
590#define elf_s390_tdata(abfd) \
591 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
592
593#define elf_s390_local_got_tls_type(abfd) \
594 (elf_s390_tdata (abfd)->local_got_tls_type)
595
596static bfd_boolean
597elf_s390_mkobject (abfd)
598 bfd *abfd;
599{
600 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
601 abfd->tdata.any = bfd_zalloc (abfd, amt);
602 if (abfd->tdata.any == NULL)
603 return FALSE;
604 return TRUE;
605}
606
607static bfd_boolean
608elf_s390_object_p (abfd)
609 bfd *abfd;
610{
611 /* Allocate our special target data. */
612 struct elf_s390_obj_tdata *new_tdata;
613 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
614 new_tdata = bfd_zalloc (abfd, amt);
615 if (new_tdata == NULL)
616 return FALSE;
617 new_tdata->root = *abfd->tdata.elf_obj_data;
618 abfd->tdata.any = new_tdata;
619 /* Set the right machine number for an s390 elf32 file. */
620 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
621}
622
a85d7ed0
NC		 623/* s390 ELF linker hash table. */
624
625struct elf_s390_link_hash_table
626{
0451c93c 627 struct elf_link_hash_table elf;
a85d7ed0 628
0451c93c
MS		 629 /* Short-cuts to get to dynamic linker sections. */
630 asection *sgot;
631 asection *sgotplt;
632 asection *srelgot;
633 asection *splt;
634 asection *srelplt;
635 asection *sdynbss;
636 asection *srelbss;
ec338859 637
69fc87f1
MS		 638 union {
639 bfd_signed_vma refcount;
640 bfd_vma offset;
641 } tls_ldm_got;
642
ec338859
AM		 643 /* Small local sym to section mapping cache. */
644 struct sym_sec_cache sym_sec;
0451c93c 645};
a85d7ed0
NC		 646
647/* Get the s390 ELF linker hash table from a link_info structure. */
648
649#define elf_s390_hash_table(p) \
650 ((struct elf_s390_link_hash_table *) ((p)->hash))
651
652/* Create an entry in an s390 ELF linker hash table. */
653
654static struct bfd_hash_entry *
0451c93c 655link_hash_newfunc (entry, table, string)
a85d7ed0
NC		 656 struct bfd_hash_entry *entry;
657 struct bfd_hash_table *table;
658 const char *string;
659{
a85d7ed0
NC		 660 /* Allocate the structure if it has not already been allocated by a
661 subclass. */
0451c93c
MS		 662 if (entry == NULL)
663 {
664 entry = bfd_hash_allocate (table,
665 sizeof (struct elf_s390_link_hash_entry));
666 if (entry == NULL)
667 return entry;
668 }
ec338859 669
a85d7ed0 670 /* Call the allocation method of the superclass. */
0451c93c
MS		 671 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
672 if (entry != NULL)
a85d7ed0 673 {
0451c93c 674 struct elf_s390_link_hash_entry *eh;
ec338859 675
0451c93c
MS		 676 eh = (struct elf_s390_link_hash_entry *) entry;
677 eh->dyn_relocs = NULL;
5236c819 678 eh->gotplt_refcount = 0;
69fc87f1 679 eh->tls_type = GOT_UNKNOWN;
a85d7ed0
NC		 680 }
681
0451c93c 682 return entry;
a85d7ed0
NC		 683}
684
685/* Create an s390 ELF linker hash table. */
686
687static struct bfd_link_hash_table *
688elf_s390_link_hash_table_create (abfd)
689 bfd *abfd;
690{
691 struct elf_s390_link_hash_table *ret;
dc810e39 692 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
a85d7ed0 693
e2d34d7d 694 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
0451c93c 695 if (ret == NULL)
a85d7ed0
NC		 696 return NULL;
697
0451c93c 698 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
a85d7ed0 699 {
e2d34d7d 700 free (ret);
a85d7ed0
NC		 701 return NULL;
702 }
703
0451c93c
MS		 704 ret->sgot = NULL;
705 ret->sgotplt = NULL;
706 ret->srelgot = NULL;
707 ret->splt = NULL;
708 ret->srelplt = NULL;
709 ret->sdynbss = NULL;
710 ret->srelbss = NULL;
69fc87f1 711 ret->tls_ldm_got.refcount = 0;
ec338859 712 ret->sym_sec.abfd = NULL;
0451c93c
MS		 713
714 return &ret->elf.root;
715}
716
717/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
718 shortcuts to them in our hash table. */
719
b34976b6 720static bfd_boolean
0451c93c
MS		 721create_got_section (dynobj, info)
722 bfd *dynobj;
723 struct bfd_link_info *info;
724{
725 struct elf_s390_link_hash_table *htab;
726
727 if (! _bfd_elf_create_got_section (dynobj, info))
b34976b6 728 return FALSE;
0451c93c
MS		 729
730 htab = elf_s390_hash_table (info);
731 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
732 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
733 if (!htab->sgot || !htab->sgotplt)
734 abort ();
735
736 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
737 if (htab->srelgot == NULL
738 || ! bfd_set_section_flags (dynobj, htab->srelgot,
739 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
740 | SEC_IN_MEMORY | SEC_LINKER_CREATED
741 | SEC_READONLY))
742 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
b34976b6
AM		 743 return FALSE;
744 return TRUE;
0451c93c
MS		 745}
746
747/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
748 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
749 hash table. */
750
b34976b6 751static bfd_boolean
0451c93c
MS		 752elf_s390_create_dynamic_sections (dynobj, info)
753 bfd *dynobj;
754 struct bfd_link_info *info;
755{
756 struct elf_s390_link_hash_table *htab;
757
758 htab = elf_s390_hash_table (info);
759 if (!htab->sgot && !create_got_section (dynobj, info))
b34976b6 760 return FALSE;
0451c93c
MS		 761
762 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 763 return FALSE;
0451c93c
MS		 764
765 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
766 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
767 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
768 if (!info->shared)
769 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
770
771 if (!htab->splt || !htab->srelplt || !htab->sdynbss
772 || (!info->shared && !htab->srelbss))
773 abort ();
774
b34976b6 775 return TRUE;
a85d7ed0
NC		 776}
777
0451c93c
MS		 778/* Copy the extra info we tack onto an elf_link_hash_entry. */
779
780static void
b48fa14c
AM		 781elf_s390_copy_indirect_symbol (bed, dir, ind)
782 struct elf_backend_data *bed;
0451c93c
MS		 783 struct elf_link_hash_entry *dir, *ind;
784{
785 struct elf_s390_link_hash_entry *edir, *eind;
786
787 edir = (struct elf_s390_link_hash_entry *) dir;
788 eind = (struct elf_s390_link_hash_entry *) ind;
789
790 if (eind->dyn_relocs != NULL)
791 {
792 if (edir->dyn_relocs != NULL)
793 {
794 struct elf_s390_dyn_relocs **pp;
795 struct elf_s390_dyn_relocs *p;
796
797 if (ind->root.type == bfd_link_hash_indirect)
798 abort ();
799
800 /* Add reloc counts against the weak sym to the strong sym
801 list. Merge any entries against the same section. */
802 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
803 {
804 struct elf_s390_dyn_relocs *q;
805
806 for (q = edir->dyn_relocs; q != NULL; q = q->next)
807 if (q->sec == p->sec)
808 {
809 q->pc_count += p->pc_count;
810 q->count += p->count;
811 *pp = p->next;
812 break;
813 }
814 if (q == NULL)
815 pp = &p->next;
816 }
817 *pp = edir->dyn_relocs;
818 }
819
820 edir->dyn_relocs = eind->dyn_relocs;
821 eind->dyn_relocs = NULL;
822 }
823
69fc87f1
MS		 824 if (ind->root.type == bfd_link_hash_indirect
825 && dir->got.refcount <= 0)
826 {
827 edir->tls_type = eind->tls_type;
828 eind->tls_type = GOT_UNKNOWN;
829 }
830
b48fa14c 831 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
0451c93c 832}
a85d7ed0 833
69fc87f1
MS		 834static int
835elf_s390_tls_transition (info, r_type, is_local)
836 struct bfd_link_info *info;
837 int r_type;
838 int is_local;
839{
840 if (info->shared)
841 return r_type;
842
843 switch (r_type)
844 {
845 case R_390_TLS_GD32:
846 case R_390_TLS_IE32:
847 if (is_local)
848 return R_390_TLS_LE32;
849 return R_390_TLS_IE32;
850 case R_390_TLS_GOTIE32:
851 if (is_local)
852 return R_390_TLS_LE32;
853 return R_390_TLS_GOTIE32;
854 case R_390_TLS_LDM32:
855 return R_390_TLS_LE32;
856 }
857
858 return r_type;
859}
860
a85d7ed0
NC		 861/* Look through the relocs for a section during the first phase, and
862 allocate space in the global offset table or procedure linkage
863 table. */
864
b34976b6 865static bfd_boolean
a85d7ed0
NC		 866elf_s390_check_relocs (abfd, info, sec, relocs)
867 bfd *abfd;
868 struct bfd_link_info *info;
869 asection *sec;
870 const Elf_Internal_Rela *relocs;
871{
0451c93c 872 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 873 Elf_Internal_Shdr *symtab_hdr;
874 struct elf_link_hash_entry **sym_hashes;
a85d7ed0
NC		 875 const Elf_Internal_Rela *rel;
876 const Elf_Internal_Rela *rel_end;
a85d7ed0 877 asection *sreloc;
5236c819 878 bfd_signed_vma *local_got_refcounts;
69fc87f1 879 int tls_type, old_tls_type;
a85d7ed0
NC		 880
881 if (info->relocateable)
b34976b6 882 return TRUE;
a85d7ed0 883
0451c93c 884 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 885 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
886 sym_hashes = elf_sym_hashes (abfd);
5236c819 887 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0 888
a85d7ed0
NC		 889 sreloc = NULL;
890
891 rel_end = relocs + sec->reloc_count;
892 for (rel = relocs; rel < rel_end; rel++)
893 {
69fc87f1 894 unsigned int r_type;
a85d7ed0
NC		 895 unsigned long r_symndx;
896 struct elf_link_hash_entry *h;
897
898 r_symndx = ELF32_R_SYM (rel->r_info);
899
0451c93c
MS		 900 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
901 {
902 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
903 bfd_archive_filename (abfd),
904 r_symndx);
b34976b6 905 return FALSE;
0451c93c
MS		 906 }
907
a85d7ed0
NC		 908 if (r_symndx < symtab_hdr->sh_info)
909 h = NULL;
910 else
dc810e39 911 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
a85d7ed0 912
5236c819
MS		 913 /* Create got section and local_got_refcounts array if they
914 are needed. */
69fc87f1
MS		 915 r_type = elf_s390_tls_transition (info,
916 ELF32_R_TYPE (rel->r_info),
917 h == NULL);
918 switch (r_type)
a85d7ed0
NC		 919 {
920 case R_390_GOT12:
5236c819 921 case R_390_GOT16:
a85d7ed0 922 case R_390_GOT32:
befc3abb 923 case R_390_GOTENT:
5236c819
MS		 924 case R_390_GOTPLT12:
925 case R_390_GOTPLT16:
926 case R_390_GOTPLT32:
927 case R_390_GOTPLTENT:
69fc87f1
MS		 928 case R_390_TLS_GD32:
929 case R_390_TLS_GOTIE12:
930 case R_390_TLS_GOTIE32:
931 case R_390_TLS_IEENT:
932 case R_390_TLS_IE32:
933 case R_390_TLS_LDM32:
5236c819
MS		 934 if (h == NULL
935 && local_got_refcounts == NULL)
a85d7ed0 936 {
5236c819
MS		 937 bfd_size_type size;
938
939 size = symtab_hdr->sh_info;
69fc87f1 940 size *= (sizeof (bfd_signed_vma) + sizeof(char));
5236c819
MS		 941 local_got_refcounts = ((bfd_signed_vma *)
942 bfd_zalloc (abfd, size));
a85d7ed0 943 if (local_got_refcounts == NULL)
5236c819
MS		 944 return FALSE;
945 elf_local_got_refcounts (abfd) = local_got_refcounts;
69fc87f1
MS		 946 elf_s390_local_got_tls_type (abfd)
947 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
a85d7ed0 948 }
5236c819
MS		 949 /* Fall through. */
950 case R_390_GOTOFF16:
951 case R_390_GOTOFF32:
0451c93c 952 case R_390_GOTPC:
befc3abb 953 case R_390_GOTPCDBL:
0451c93c
MS		 954 if (htab->sgot == NULL)
955 {
956 if (htab->elf.dynobj == NULL)
957 htab->elf.dynobj = abfd;
958 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 959 return FALSE;
0451c93c 960 }
5236c819
MS		 961 }
962
69fc87f1 963 switch (r_type)
5236c819 964 {
5236c819
MS		 965 case R_390_GOTOFF16:
966 case R_390_GOTOFF32:
967 case R_390_GOTPC:
968 case R_390_GOTPCDBL:
969 /* Got is created, nothing to be done. */
a85d7ed0
NC		 970 break;
971
972 case R_390_PLT16DBL:
befc3abb 973 case R_390_PLT32DBL:
a85d7ed0 974 case R_390_PLT32:
5236c819
MS		 975 case R_390_PLTOFF16:
976 case R_390_PLTOFF32:
a85d7ed0
NC		 977 /* This symbol requires a procedure linkage table entry. We
978 actually build the entry in adjust_dynamic_symbol,
979 because this might be a case of linking PIC code which is
980 never referenced by a dynamic object, in which case we
981 don't need to generate a procedure linkage table entry
982 after all. */
983
984 /* If this is a local symbol, we resolve it directly without
985 creating a procedure linkage table entry. */
5236c819
MS		 986 if (h != NULL)
987 {
988 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
989 h->plt.refcount += 1;
990 }
991 break;
a85d7ed0 992
5236c819
MS		 993 case R_390_GOTPLT12:
994 case R_390_GOTPLT16:
995 case R_390_GOTPLT32:
996 case R_390_GOTPLTENT:
997 /* This symbol requires either a procedure linkage table entry
998 or an entry in the local got. We actually build the entry
999 in adjust_dynamic_symbol because whether this is really a
1000 global reference can change and with it the fact if we have
1001 to create a plt entry or a local got entry. To be able to
1002 make a once global symbol a local one we have to keep track
1003 of the number of gotplt references that exist for this
1004 symbol. */
1005 if (h != NULL)
1006 {
1007 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1008 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1009 h->plt.refcount += 1;
1010 }
1011 else
1012 local_got_refcounts[r_symndx] += 1;
a85d7ed0
NC		 1013 break;
1014
69fc87f1
MS		 1015 case R_390_TLS_LDM32:
1016 htab->tls_ldm_got.refcount += 1;
1017 break;
1018
1019 case R_390_TLS_IE32:
1020 case R_390_TLS_GOTIE12:
1021 case R_390_TLS_GOTIE32:
1022 case R_390_TLS_IEENT:
1023 if (info->shared)
1024 info->flags |= DF_STATIC_TLS;
1025 /* Fall through */
1026
1027 case R_390_GOT12:
1028 case R_390_GOT16:
1029 case R_390_GOT32:
1030 case R_390_GOTENT:
1031 case R_390_TLS_GD32:
1032 /* This symbol requires a global offset table entry. */
1033 switch (r_type)
1034 {
1035 default:
1036 case R_390_GOT12:
1037 case R_390_GOT16:
1038 case R_390_GOT32:
1039 case R_390_GOTENT:
1040 tls_type = GOT_NORMAL;
1041 break;
1042 case R_390_TLS_GD32:
1043 tls_type = GOT_TLS_GD;
1044 break;
1045 case R_390_TLS_IE32:
1046 case R_390_TLS_GOTIE32:
1047 tls_type = GOT_TLS_IE;
1048 break;
1049 case R_390_TLS_GOTIE12:
1050 case R_390_TLS_IEENT:
1051 tls_type = GOT_TLS_IE_NLT;
1052 break;
1053 }
1054
1055 if (h != NULL)
1056 {
1057 h->got.refcount += 1;
1058 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1059 }
1060 else
1061 {
1062 local_got_refcounts[r_symndx] += 1;
1063 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1064 }
1065 /* If a TLS symbol is accessed using IE at least once,
1066 there is no point to use dynamic model for it. */
1067 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1068 {
1069 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1070 {
1071 (*_bfd_error_handler)
1072 (_("%s: `%s' accessed both as normal and thread local symbol"),
1073 bfd_archive_filename (abfd), h->root.root.string);
1074 return FALSE;
1075 }
1076 if (old_tls_type > tls_type)
1077 tls_type = old_tls_type;
1078 }
1079
1080 if (old_tls_type != tls_type)
1081 {
1082 if (h != NULL)
1083 elf_s390_hash_entry (h)->tls_type = tls_type;
1084 else
1085 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1086 }
1087
1088 if (r_type != R_390_TLS_IE32)
1089 break;
1090 /* Fall through */
1091
1092 case R_390_TLS_LE32:
1093 if (!info->shared)
1094 break;
1095 info->flags |= DF_STATIC_TLS;
1096 /* Fall through */
1097
a85d7ed0
NC		 1098 case R_390_8:
1099 case R_390_16:
1100 case R_390_32:
1101 case R_390_PC16:
1102 case R_390_PC16DBL:
befc3abb 1103 case R_390_PC32DBL:
a85d7ed0 1104 case R_390_PC32:
0451c93c
MS		 1105 if (h != NULL && !info->shared)
1106 {
1107 /* If this reloc is in a read-only section, we might
1108 need a copy reloc. We can't check reliably at this
1109 stage whether the section is read-only, as input
1110 sections have not yet been mapped to output sections.
1111 Tentatively set the flag for now, and correct in
1112 adjust_dynamic_symbol. */
1113 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
ec338859 1114
0451c93c
MS		 1115 /* We may need a .plt entry if the function this reloc
1116 refers to is in a shared lib. */
1117 h->plt.refcount += 1;
1118 }
a85d7ed0
NC		 1119
1120 /* If we are creating a shared library, and this is a reloc
0451c93c
MS		 1121 against a global symbol, or a non PC relative reloc
1122 against a local symbol, then we need to copy the reloc
1123 into the shared library. However, if we are linking with
1124 -Bsymbolic, we do not need to copy a reloc against a
1125 global symbol which is defined in an object we are
1126 including in the link (i.e., DEF_REGULAR is set). At
1127 this point we have not seen all the input files, so it is
1128 possible that DEF_REGULAR is not set now but will be set
1129 later (it is never cleared). In case of a weak definition,
1130 DEF_REGULAR may be cleared later by a strong definition in
1131 a shared library. We account for that possibility below by
1132 storing information in the relocs_copied field of the hash
1133 table entry. A similar situation occurs when creating
1134 shared libraries and symbol visibility changes render the
1135 symbol local.
1136
1137 If on the other hand, we are creating an executable, we
1138 may need to keep relocations for symbols satisfied by a
1139 dynamic library if we manage to avoid copy relocs for the
1140 symbol. */
1141 if ((info->shared
1142 && (sec->flags & SEC_ALLOC) != 0
ec338859 1143 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
0451c93c 1144 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
befc3abb 1145 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
0451c93c
MS		 1146 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1147 || (h != NULL
1148 && (! info->symbolic
1149 || h->root.type == bfd_link_hash_defweak
1150 || (h->elf_link_hash_flags
1151 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1152 || (!info->shared
1153 && (sec->flags & SEC_ALLOC) != 0
1154 && h != NULL
1155 && (h->root.type == bfd_link_hash_defweak
1156 || (h->elf_link_hash_flags
1157 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
a85d7ed0 1158 {
ec338859
AM		 1159 struct elf_s390_dyn_relocs *p;
1160 struct elf_s390_dyn_relocs **head;
1161
0451c93c
MS		 1162 /* We must copy these reloc types into the output file.
1163 Create a reloc section in dynobj and make room for
1164 this reloc. */
a85d7ed0
NC		 1165 if (sreloc == NULL)
1166 {
1167 const char *name;
0451c93c 1168 bfd *dynobj;
ec338859 1169
a85d7ed0
NC		 1170 name = (bfd_elf_string_from_elf_section
1171 (abfd,
1172 elf_elfheader (abfd)->e_shstrndx,
1173 elf_section_data (sec)->rel_hdr.sh_name));
1174 if (name == NULL)
b34976b6 1175 return FALSE;
a85d7ed0 1176
0451c93c
MS		 1177 if (strncmp (name, ".rela", 5) != 0
1178 || strcmp (bfd_get_section_name (abfd, sec),
1179 name + 5) != 0)
1180 {
1181 (*_bfd_error_handler)
1182 (_("%s: bad relocation section name `%s\'"),
1183 bfd_archive_filename (abfd), name);
1184 }
1185
1186 if (htab->elf.dynobj == NULL)
1187 htab->elf.dynobj = abfd;
a85d7ed0 1188
0451c93c 1189 dynobj = htab->elf.dynobj;
a85d7ed0
NC		 1190 sreloc = bfd_get_section_by_name (dynobj, name);
1191 if (sreloc == NULL)
1192 {
1193 flagword flags;
1194
1195 sreloc = bfd_make_section (dynobj, name);
1196 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1197 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1198 if ((sec->flags & SEC_ALLOC) != 0)
1199 flags |= SEC_ALLOC | SEC_LOAD;
1200 if (sreloc == NULL
1201 || ! bfd_set_section_flags (dynobj, sreloc, flags)
1202 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
b34976b6 1203 return FALSE;
a85d7ed0 1204 }
0451c93c 1205 elf_section_data (sec)->sreloc = sreloc;
a85d7ed0
NC		 1206 }
1207
0451c93c
MS		 1208 /* If this is a global symbol, we count the number of
1209 relocations we need for this symbol. */
1210 if (h != NULL)
a85d7ed0 1211 {
ec338859 1212 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
0451c93c
MS		 1213 }
1214 else
1215 {
ec338859
AM		 1216 /* Track dynamic relocs needed for local syms too.
1217 We really need local syms available to do this
1218 easily. Oh well. */
1219
1220 asection *s;
1221 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1222 sec, r_symndx);
1223 if (s == NULL)
b34976b6 1224 return FALSE;
ec338859
AM		 1225
1226 head = ((struct elf_s390_dyn_relocs **)
1227 &elf_section_data (s)->local_dynrel);
1228 }
1229
1230 p = *head;
1231 if (p == NULL || p->sec != sec)
1232 {
1233 bfd_size_type amt = sizeof *p;
1234 p = ((struct elf_s390_dyn_relocs *)
1235 bfd_alloc (htab->elf.dynobj, amt));
1236 if (p == NULL)
b34976b6 1237 return FALSE;
ec338859
AM		 1238 p->next = *head;
1239 *head = p;
1240 p->sec = sec;
1241 p->count = 0;
1242 p->pc_count = 0;
a85d7ed0 1243 }
ec338859
AM		 1244
1245 p->count += 1;
1246 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1247 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
befc3abb 1248 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
ec338859
AM		 1249 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1250 p->pc_count += 1;
a85d7ed0 1251 }
a85d7ed0 1252 break;
ec338859 1253
a85d7ed0
NC		 1254 /* This relocation describes the C++ object vtable hierarchy.
1255 Reconstruct it for later use during GC. */
1256 case R_390_GNU_VTINHERIT:
1257 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 1258 return FALSE;
a85d7ed0 1259 break;
ec338859 1260
a85d7ed0
NC		 1261 /* This relocation describes which C++ vtable entries are actually
1262 used. Record for later use during GC. */
1263 case R_390_GNU_VTENTRY:
db727808 1264 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 1265 return FALSE;
a85d7ed0 1266 break;
ec338859 1267
a85d7ed0
NC		 1268 default:
1269 break;
1270 }
1271 }
1272
b34976b6 1273 return TRUE;
a85d7ed0
NC		 1274}
1275
1276/* Return the section that should be marked against GC for a given
1277 relocation. */
1278
1279static asection *
1e2f5b6e
AM		 1280elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1281 asection *sec;
a85d7ed0
NC		 1282 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1283 Elf_Internal_Rela *rel;
1284 struct elf_link_hash_entry *h;
1285 Elf_Internal_Sym *sym;
1286{
1287 if (h != NULL)
1288 {
1289 switch (ELF32_R_TYPE (rel->r_info))
1290 {
1291 case R_390_GNU_VTINHERIT:
1292 case R_390_GNU_VTENTRY:
1293 break;
1294
1295 default:
1296 switch (h->root.type)
1297 {
1298 case bfd_link_hash_defined:
1299 case bfd_link_hash_defweak:
1300 return h->root.u.def.section;
1301
1302 case bfd_link_hash_common:
1303 return h->root.u.c.p->section;
1304
1305 default:
1306 break;
1307 }
1308 }
1309 }
1310 else
1e2f5b6e 1311 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
a85d7ed0
NC		 1312
1313 return NULL;
1314}
1315
1316/* Update the got entry reference counts for the section being removed. */
1317
b34976b6 1318static bfd_boolean
a85d7ed0 1319elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
0451c93c
MS		 1320 bfd *abfd;
1321 struct bfd_link_info *info;
1322 asection *sec;
1323 const Elf_Internal_Rela *relocs;
a85d7ed0
NC		 1324{
1325 Elf_Internal_Shdr *symtab_hdr;
1326 struct elf_link_hash_entry **sym_hashes;
1327 bfd_signed_vma *local_got_refcounts;
1328 const Elf_Internal_Rela *rel, *relend;
1329 unsigned long r_symndx;
69fc87f1 1330 int r_type;
a85d7ed0 1331 struct elf_link_hash_entry *h;
a85d7ed0 1332
ec338859 1333 elf_section_data (sec)->local_dynrel = NULL;
a85d7ed0 1334
0451c93c
MS		 1335 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1336 sym_hashes = elf_sym_hashes (abfd);
1337 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0
NC		 1338
1339 relend = relocs + sec->reloc_count;
1340 for (rel = relocs; rel < relend; rel++)
5236c819
MS		 1341 {
1342 r_symndx = ELF32_R_SYM (rel->r_info);
0451c93c 1343
5236c819
MS		 1344 if (r_symndx < symtab_hdr->sh_info)
1345 h = NULL;
1346 else
1347 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1348
69fc87f1
MS		 1349 r_type = elf_s390_tls_transition (info,
1350 ELF32_R_TYPE (rel->r_info),
1351 r_symndx >= symtab_hdr->sh_info);
1352 switch (r_type)
5236c819 1353 {
69fc87f1
MS		 1354 case R_390_TLS_LDM32:
1355 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1356 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1357 break;
1358
1359 case R_390_TLS_GD32:
1360 case R_390_TLS_IE32:
1361 case R_390_TLS_GOTIE12:
1362 case R_390_TLS_GOTIE32:
1363 case R_390_TLS_IEENT:
5236c819
MS		 1364 case R_390_GOT12:
1365 case R_390_GOT16:
1366 case R_390_GOT32:
1367 case R_390_GOTOFF16:
1368 case R_390_GOTOFF32:
1369 case R_390_GOTPC:
1370 case R_390_GOTPCDBL:
1371 case R_390_GOTENT:
1372 if (h != NULL)
1373 {
1374 if (h->got.refcount > 0)
1375 h->got.refcount -= 1;
1376 }
1377 else if (local_got_refcounts != NULL)
1378 {
1379 if (local_got_refcounts[r_symndx] > 0)
1380 local_got_refcounts[r_symndx] -= 1;
1381 }
69fc87f1
MS		 1382 if (r_type != R_390_TLS_IE32)
1383 break;
1384 /* Fall through */
5236c819 1385
69fc87f1
MS		 1386 case R_390_TLS_LE32:
1387 if (!info->shared)
1388 break;
1389 /* Fall through */
a85d7ed0 1390
5236c819
MS		 1391 case R_390_8:
1392 case R_390_12:
1393 case R_390_16:
1394 case R_390_32:
1395 case R_390_PC16:
1396 case R_390_PC16DBL:
1397 case R_390_PC32DBL:
1398 case R_390_PC32:
1399 if (h != NULL)
1400 {
1401 struct elf_s390_link_hash_entry *eh;
1402 struct elf_s390_dyn_relocs **pp;
1403 struct elf_s390_dyn_relocs *p;
1404
1405 if (!info->shared && h->plt.refcount > 0)
1406 h->plt.refcount -= 1;
1407
1408 eh = (struct elf_s390_link_hash_entry *) h;
1409
1410 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1411 if (p->sec == sec)
1412 {
1413 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1414 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1415 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1416 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1417 p->pc_count -= 1;
1418 p->count -= 1;
1419 if (p->count == 0)
1420 *pp = p->next;
1421 break;
1422 }
1423 }
1424 break;
1425
69fc87f1
MS		 1426 case R_390_PLT16DBL:
1427 case R_390_PLT32DBL:
1428 case R_390_PLT32:
1429 case R_390_PLTOFF16:
1430 case R_390_PLTOFF32:
1431 if (h != NULL)
1432 {
1433 if (h->plt.refcount > 0)
1434 h->plt.refcount -= 1;
1435 }
1436 break;
1437
1438 case R_390_GOTPLT12:
1439 case R_390_GOTPLT16:
1440 case R_390_GOTPLT32:
1441 case R_390_GOTPLTENT:
1442 if (h != NULL)
1443 {
1444 if (h->plt.refcount > 0)
1445 {
1446 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1447 h->plt.refcount -= 1;
1448 }
1449 }
1450 else if (local_got_refcounts != NULL)
1451 {
1452 if (local_got_refcounts[r_symndx] > 0)
1453 local_got_refcounts[r_symndx] -= 1;
1454 }
1455 break;
1456
5236c819
MS		 1457 default:
1458 break;
1459 }
1460 }
a85d7ed0 1461
b34976b6 1462 return TRUE;
a85d7ed0
NC		 1463}
1464
5236c819
MS		 1465/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1466 entry but we found we will not create any. Called when we find we will
1467 not have any PLT for this symbol, by for example
1468 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1469 or elf_s390_size_dynamic_sections if no dynamic sections will be
1470 created (we're only linking static objects). */
1471
1472static void
1473elf_s390_adjust_gotplt (h)
1474 struct elf_s390_link_hash_entry *h;
1475{
1476 if (h->elf.root.type == bfd_link_hash_warning)
1477 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1478
1479 if (h->gotplt_refcount <= 0)
1480 return;
1481
1482 /* We simply add the number of gotplt references to the number
1483 * of got references for this symbol. */
1484 h->elf.got.refcount += h->gotplt_refcount;
1485 h->gotplt_refcount = -1;
1486}
1487
a85d7ed0
NC		 1488/* Adjust a symbol defined by a dynamic object and referenced by a
1489 regular object. The current definition is in some section of the
1490 dynamic object, but we're not including those sections. We have to
1491 change the definition to something the rest of the link can
1492 understand. */
1493
b34976b6 1494static bfd_boolean
a85d7ed0
NC		 1495elf_s390_adjust_dynamic_symbol (info, h)
1496 struct bfd_link_info *info;
1497 struct elf_link_hash_entry *h;
1498{
0451c93c
MS		 1499 struct elf_s390_link_hash_table *htab;
1500 struct elf_s390_link_hash_entry * eh;
1501 struct elf_s390_dyn_relocs *p;
a85d7ed0
NC		 1502 asection *s;
1503 unsigned int power_of_two;
1504
a85d7ed0
NC		 1505 /* If this is a function, put it in the procedure linkage table. We
1506 will fill in the contents of the procedure linkage table later
cedb70c5 1507 (although we could actually do it here). */
a85d7ed0
NC		 1508 if (h->type == STT_FUNC
1509 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1510 {
0451c93c
MS		 1511 if (h->plt.refcount <= 0
1512 || (! info->shared
1513 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
f9cd9119
MS		 1514 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1515 && h->root.type != bfd_link_hash_undefweak
1516 && h->root.type != bfd_link_hash_undefined))
a85d7ed0
NC		 1517 {
1518 /* This case can occur if we saw a PLT32 reloc in an input
1519 file, but the symbol was never referred to by a dynamic
1520 object, or if all references were garbage collected. In
1521 such a case, we don't actually need to build a procedure
1522 linkage table, and we can just do a PC32 reloc instead. */
1523 h->plt.offset = (bfd_vma) -1;
1524 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5236c819 1525 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
a85d7ed0
NC		 1526 }
1527
b34976b6 1528 return TRUE;
a85d7ed0 1529 }
bbd7ec4a 1530 else
0451c93c
MS		 1531 /* It's possible that we incorrectly decided a .plt reloc was
1532 needed for an R_390_PC32 reloc to a non-function sym in
1533 check_relocs. We can't decide accurately between function and
1534 non-function syms in check-relocs; Objects loaded later in
1535 the link may change h->type. So fix it now. */
bbd7ec4a 1536 h->plt.offset = (bfd_vma) -1;
a85d7ed0
NC		 1537
1538 /* If this is a weak symbol, and there is a real definition, the
1539 processor independent code will have arranged for us to see the
1540 real definition first, and we can just use the same value. */
1541 if (h->weakdef != NULL)
1542 {
1543 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1544 || h->weakdef->root.type == bfd_link_hash_defweak);
1545 h->root.u.def.section = h->weakdef->root.u.def.section;
1546 h->root.u.def.value = h->weakdef->root.u.def.value;
b34976b6 1547 return TRUE;
a85d7ed0
NC		 1548 }
1549
1550 /* This is a reference to a symbol defined by a dynamic object which
1551 is not a function. */
1552
1553 /* If we are creating a shared library, we must presume that the
1554 only references to the symbol are via the global offset table.
1555 For such cases we need not do anything here; the relocations will
1556 be handled correctly by relocate_section. */
1557 if (info->shared)
b34976b6 1558 return TRUE;
a85d7ed0
NC		 1559
1560 /* If there are no references to this symbol that do not use the
1561 GOT, we don't need to generate a copy reloc. */
1562 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
b34976b6 1563 return TRUE;
a85d7ed0 1564
0451c93c
MS		 1565 /* If -z nocopyreloc was given, we won't generate them either. */
1566 if (info->nocopyreloc)
1567 {
1568 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
b34976b6 1569 return TRUE;
0451c93c
MS		 1570 }
1571
1572 eh = (struct elf_s390_link_hash_entry *) h;
1573 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1574 {
1575 s = p->sec->output_section;
1576 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1577 break;
1578 }
1579
1580 /* If we didn't find any dynamic relocs in read-only sections, then
ec338859 1581 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
0451c93c
MS		 1582 if (p == NULL)
1583 {
1584 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
b34976b6 1585 return TRUE;
0451c93c
MS		 1586 }
1587
a85d7ed0
NC		 1588 /* We must allocate the symbol in our .dynbss section, which will
1589 become part of the .bss section of the executable. There will be
1590 an entry for this symbol in the .dynsym section. The dynamic
1591 object will contain position independent code, so all references
1592 from the dynamic object to this symbol will go through the global
1593 offset table. The dynamic linker will use the .dynsym entry to
1594 determine the address it must put in the global offset table, so
1595 both the dynamic object and the regular object will refer to the
1596 same memory location for the variable. */
1597
0451c93c 1598 htab = elf_s390_hash_table (info);
a85d7ed0 1599
0451c93c
MS		 1600 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1601 copy the initial value out of the dynamic object and into the
1602 runtime process image. */
a85d7ed0
NC		 1603 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1604 {
0451c93c 1605 htab->srelbss->_raw_size += sizeof (Elf32_External_Rela);
a85d7ed0
NC		 1606 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1607 }
1608
1609 /* We need to figure out the alignment required for this symbol. I
1610 have no idea how ELF linkers handle this. */
1611 power_of_two = bfd_log2 (h->size);
1612 if (power_of_two > 3)
1613 power_of_two = 3;
1614
1615 /* Apply the required alignment. */
0451c93c
MS		 1616 s = htab->sdynbss;
1617 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1618 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
a85d7ed0 1619 {
0451c93c 1620 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
b34976b6 1621 return FALSE;
a85d7ed0
NC		 1622 }
1623
1624 /* Define the symbol as being at this point in the section. */
1625 h->root.u.def.section = s;
1626 h->root.u.def.value = s->_raw_size;
1627
1628 /* Increment the section size to make room for the symbol. */
1629 s->_raw_size += h->size;
1630
b34976b6 1631 return TRUE;
a85d7ed0
NC		 1632}
1633
0451c93c
MS		 1634/* This is the condition under which elf_s390_finish_dynamic_symbol
1635 will be called from elflink.h. If elflink.h doesn't call our
1636 finish_dynamic_symbol routine, we'll need to do something about
1637 initializing any .plt and .got entries in elf_s390_relocate_section. */
1638#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1639 ((DYN) \
1640 && ((INFO)->shared \
1641 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1642 && ((H)->dynindx != -1 \
1643 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1644
1645/* Allocate space in .plt, .got and associated reloc sections for
1646 dynamic relocs. */
1647
b34976b6 1648static bfd_boolean
0451c93c
MS		 1649allocate_dynrelocs (h, inf)
1650 struct elf_link_hash_entry *h;
1651 PTR inf;
1652{
1653 struct bfd_link_info *info;
1654 struct elf_s390_link_hash_table *htab;
1655 struct elf_s390_link_hash_entry *eh;
1656 struct elf_s390_dyn_relocs *p;
1657
e92d460e 1658 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1659 return TRUE;
0451c93c 1660
e92d460e 1661 if (h->root.type == bfd_link_hash_warning)
5236c819
MS		 1662 /* When warning symbols are created, they **replace** the "real"
1663 entry in the hash table, thus we never get to see the real
1664 symbol in a hash traversal. So look at it now. */
e92d460e
AM		 1665 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1666
0451c93c
MS		 1667 info = (struct bfd_link_info *) inf;
1668 htab = elf_s390_hash_table (info);
1669
1670 if (htab->elf.dynamic_sections_created
1671 && h->plt.refcount > 0)
1672 {
1673 /* Make sure this symbol is output as a dynamic symbol.
1674 Undefined weak syms won't yet be marked as dynamic. */
1675 if (h->dynindx == -1
1676 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1677 {
1678 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
b34976b6 1679 return FALSE;
0451c93c
MS		 1680 }
1681
1682 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
1683 {
1684 asection *s = htab->splt;
1685
1686 /* If this is the first .plt entry, make room for the special
1687 first entry. */
1688 if (s->_raw_size == 0)
1689 s->_raw_size += PLT_FIRST_ENTRY_SIZE;
1690
1691 h->plt.offset = s->_raw_size;
1692
1693 /* If this symbol is not defined in a regular file, and we are
1694 not generating a shared library, then set the symbol to this
1695 location in the .plt. This is required to make function
1696 pointers compare as equal between the normal executable and
1697 the shared library. */
1698 if (! info->shared
1699 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1700 {
1701 h->root.u.def.section = s;
1702 h->root.u.def.value = h->plt.offset;
1703 }
ec338859 1704
0451c93c
MS		 1705 /* Make room for this entry. */
1706 s->_raw_size += PLT_ENTRY_SIZE;
ec338859 1707
0451c93c
MS		 1708 /* We also need to make an entry in the .got.plt section, which
1709 will be placed in the .got section by the linker script. */
1710 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1711
1712 /* We also need to make an entry in the .rela.plt section. */
1713 htab->srelplt->_raw_size += sizeof (Elf32_External_Rela);
1714 }
1715 else
1716 {
1717 h->plt.offset = (bfd_vma) -1;
1718 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5236c819 1719 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c 1720 }
ec338859 1721 }
0451c93c
MS		 1722 else
1723 {
1724 h->plt.offset = (bfd_vma) -1;
1725 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5236c819 1726 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
ec338859
AM		 1727 }
1728
69fc87f1
MS		 1729 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1730 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1731 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1732 we can save the dynamic TLS relocation. */
1733 if (h->got.refcount > 0
1734 && !info->shared
1735 && h->dynindx == -1
1736 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
0451c93c 1737 {
69fc87f1
MS		 1738 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1739 /* For the GOTIE access without a literal pool entry the offset has
1740 to be stored somewhere. The immediate value in the instruction
1741 is not bit enough so the value is stored in the got. */
1742 {
1743 h->got.offset = htab->sgot->_raw_size;
1744 htab->sgot->_raw_size += GOT_ENTRY_SIZE;
1745 }
1746 else
1747 h->got.offset = (bfd_vma) -1;
1748 }
1749 else if (h->got.refcount > 0)
1750 {
0451c93c 1751 asection *s;
b34976b6 1752 bfd_boolean dyn;
69fc87f1 1753 int tls_type = elf_s390_hash_entry(h)->tls_type;
0451c93c
MS		 1754
1755 /* Make sure this symbol is output as a dynamic symbol.
1756 Undefined weak syms won't yet be marked as dynamic. */
1757 if (h->dynindx == -1
1758 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1759 {
1760 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
b34976b6 1761 return FALSE;
0451c93c
MS		 1762 }
1763
1764 s = htab->sgot;
1765 h->got.offset = s->_raw_size;
1766 s->_raw_size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1767 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1768 if (tls_type == GOT_TLS_GD)
1769 s->_raw_size += GOT_ENTRY_SIZE;
0451c93c 1770 dyn = htab->elf.dynamic_sections_created;
69fc87f1
MS		 1771 /* R_390_TLS_IE32 needs one dynamic relocation,
1772 R_390_TLS_GD32 needs one if local symbol and two if global. */
1773 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1774 || tls_type >= GOT_TLS_IE)
1775 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
1776 else if (tls_type == GOT_TLS_GD)
1777 htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rela);
1778 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
0451c93c
MS		 1779 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
1780 }
1781 else
1782 h->got.offset = (bfd_vma) -1;
1783
1784 eh = (struct elf_s390_link_hash_entry *) h;
1785 if (eh->dyn_relocs == NULL)
b34976b6 1786 return TRUE;
0451c93c
MS		 1787
1788 /* In the shared -Bsymbolic case, discard space allocated for
1789 dynamic pc-relative relocs against symbols which turn out to be
1790 defined in regular objects. For the normal shared case, discard
1791 space for pc-relative relocs that have become local due to symbol
1792 visibility changes. */
1793
1794 if (info->shared)
1795 {
1796 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1797 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1798 || info->symbolic))
1799 {
1800 struct elf_s390_dyn_relocs **pp;
1801
1802 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1803 {
1804 p->count -= p->pc_count;
1805 p->pc_count = 0;
1806 if (p->count == 0)
1807 *pp = p->next;
1808 else
1809 pp = &p->next;
1810 }
1811 }
1812 }
1813 else
1814 {
1815 /* For the non-shared case, discard space for relocs against
1816 symbols which turn out to need copy relocs or are not
1817 dynamic. */
1818
1819 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1820 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1821 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1822 || (htab->elf.dynamic_sections_created
1823 && (h->root.type == bfd_link_hash_undefweak
1824 || h->root.type == bfd_link_hash_undefined))))
1825 {
1826 /* Make sure this symbol is output as a dynamic symbol.
1827 Undefined weak syms won't yet be marked as dynamic. */
1828 if (h->dynindx == -1
1829 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1830 {
1831 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
b34976b6 1832 return FALSE;
0451c93c
MS		 1833 }
1834
1835 /* If that succeeded, we know we'll be keeping all the
1836 relocs. */
1837 if (h->dynindx != -1)
1838 goto keep;
1839 }
1840
1841 eh->dyn_relocs = NULL;
1842
ec338859 1843 keep: ;
0451c93c
MS		 1844 }
1845
1846 /* Finally, allocate space. */
1847 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1848 {
1849 asection *sreloc = elf_section_data (p->sec)->sreloc;
1850 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
1851 }
1852
b34976b6 1853 return TRUE;
0451c93c
MS		 1854}
1855
1856/* Find any dynamic relocs that apply to read-only sections. */
1857
b34976b6 1858static bfd_boolean
0451c93c
MS		 1859readonly_dynrelocs (h, inf)
1860 struct elf_link_hash_entry *h;
1861 PTR inf;
1862{
1863 struct elf_s390_link_hash_entry *eh;
1864 struct elf_s390_dyn_relocs *p;
1865
e92d460e
AM		 1866 if (h->root.type == bfd_link_hash_warning)
1867 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1868
0451c93c
MS		 1869 eh = (struct elf_s390_link_hash_entry *) h;
1870 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1871 {
1872 asection *s = p->sec->output_section;
1873
1874 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1875 {
1876 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1877
1878 info->flags |= DF_TEXTREL;
1879
1880 /* Not an error, just cut short the traversal. */
b34976b6 1881 return FALSE;
0451c93c
MS		 1882 }
1883 }
b34976b6 1884 return TRUE;
0451c93c
MS		 1885}
1886
a85d7ed0
NC		 1887/* Set the sizes of the dynamic sections. */
1888
b34976b6 1889static bfd_boolean
a85d7ed0 1890elf_s390_size_dynamic_sections (output_bfd, info)
29c2fb7c 1891 bfd *output_bfd ATTRIBUTE_UNUSED;
a85d7ed0
NC		 1892 struct bfd_link_info *info;
1893{
0451c93c 1894 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1895 bfd *dynobj;
1896 asection *s;
b34976b6 1897 bfd_boolean relocs;
0451c93c 1898 bfd *ibfd;
a85d7ed0 1899
0451c93c
MS		 1900 htab = elf_s390_hash_table (info);
1901 dynobj = htab->elf.dynobj;
1902 if (dynobj == NULL)
1903 abort ();
a85d7ed0 1904
0451c93c 1905 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 1906 {
1907 /* Set the contents of the .interp section to the interpreter. */
1908 if (! info->shared)
1909 {
1910 s = bfd_get_section_by_name (dynobj, ".interp");
0451c93c
MS		 1911 if (s == NULL)
1912 abort ();
a85d7ed0
NC		 1913 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1914 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1915 }
1916 }
a85d7ed0 1917
0451c93c
MS		 1918 /* Set up .got offsets for local syms, and space for local dynamic
1919 relocs. */
1920 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
a85d7ed0 1921 {
0451c93c
MS		 1922 bfd_signed_vma *local_got;
1923 bfd_signed_vma *end_local_got;
69fc87f1 1924 char *local_tls_type;
0451c93c
MS		 1925 bfd_size_type locsymcount;
1926 Elf_Internal_Shdr *symtab_hdr;
1927 asection *srela;
a85d7ed0 1928
0451c93c 1929 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
a85d7ed0
NC		 1930 continue;
1931
0451c93c 1932 for (s = ibfd->sections; s != NULL; s = s->next)
a85d7ed0 1933 {
ec338859 1934 struct elf_s390_dyn_relocs *p;
0451c93c 1935
ec338859
AM		 1936 for (p = *((struct elf_s390_dyn_relocs **)
1937 &elf_section_data (s)->local_dynrel);
1938 p != NULL;
1939 p = p->next)
a85d7ed0 1940 {
ec338859
AM		 1941 if (!bfd_is_abs_section (p->sec)
1942 && bfd_is_abs_section (p->sec->output_section))
1943 {
1944 /* Input section has been discarded, either because
1945 it is a copy of a linkonce section or due to
1946 linker script /DISCARD/, so we'll be discarding
1947 the relocs too. */
1948 }
248866a8 1949 else if (p->count != 0)
ec338859
AM		 1950 {
1951 srela = elf_section_data (p->sec)->sreloc;
1952 srela->_raw_size += p->count * sizeof (Elf32_External_Rela);
248866a8
AM		 1953 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1954 info->flags |= DF_TEXTREL;
ec338859 1955 }
a85d7ed0
NC		 1956 }
1957 }
0451c93c
MS		 1958
1959 local_got = elf_local_got_refcounts (ibfd);
1960 if (!local_got)
1961 continue;
1962
1963 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1964 locsymcount = symtab_hdr->sh_info;
1965 end_local_got = local_got + locsymcount;
69fc87f1 1966 local_tls_type = elf_s390_local_got_tls_type (ibfd);
0451c93c
MS		 1967 s = htab->sgot;
1968 srela = htab->srelgot;
69fc87f1 1969 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
a85d7ed0 1970 {
0451c93c 1971 if (*local_got > 0)
a85d7ed0 1972 {
0451c93c
MS		 1973 *local_got = s->_raw_size;
1974 s->_raw_size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1975 if (*local_tls_type == GOT_TLS_GD)
1976 s->_raw_size += GOT_ENTRY_SIZE;
0451c93c
MS		 1977 if (info->shared)
1978 srela->_raw_size += sizeof (Elf32_External_Rela);
a85d7ed0
NC		 1979 }
1980 else
0451c93c
MS		 1981 *local_got = (bfd_vma) -1;
1982 }
1983 }
1984
69fc87f1
MS		 1985 if (htab->tls_ldm_got.refcount > 0)
1986 {
1987 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1988 relocs. */
1989 htab->tls_ldm_got.offset = htab->sgot->_raw_size;
1990 htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
1991 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
1992 }
1993 else
1994 htab->tls_ldm_got.offset = -1;
1995
0451c93c
MS		 1996 /* Allocate global sym .plt and .got entries, and space for global
1997 sym dynamic relocs. */
1998 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1999
2000 /* We now have determined the sizes of the various dynamic sections.
2001 Allocate memory for them. */
b34976b6 2002 relocs = FALSE;
0451c93c
MS		 2003 for (s = dynobj->sections; s != NULL; s = s->next)
2004 {
2005 if ((s->flags & SEC_LINKER_CREATED) == 0)
2006 continue;
2007
2008 if (s == htab->splt
2009 || s == htab->sgot
2010 || s == htab->sgotplt)
2011 {
2012 /* Strip this section if we don't need it; see the
2013 comment below. */
a85d7ed0 2014 }
0451c93c
MS		 2015 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2016 {
a779acda 2017 if (s->_raw_size != 0)
b34976b6 2018 relocs = TRUE;
ec338859 2019
0451c93c
MS		 2020 /* We use the reloc_count field as a counter if we need
2021 to copy relocs into the output file. */
2022 s->reloc_count = 0;
2023 }
2024 else
a85d7ed0
NC		 2025 {
2026 /* It's not one of our sections, so don't allocate space. */
2027 continue;
2028 }
2029
0451c93c 2030 if (s->_raw_size == 0)
a85d7ed0 2031 {
0451c93c
MS		 2032 /* If we don't need this section, strip it from the
2033 output file. This is to handle .rela.bss and
2034 .rela.plt. We must create it in
2035 create_dynamic_sections, because it must be created
2036 before the linker maps input sections to output
2037 sections. The linker does that before
2038 adjust_dynamic_symbol is called, and it is that
2039 function which decides whether anything needs to go
2040 into these sections. */
2041
a85d7ed0
NC		 2042 _bfd_strip_section_from_output (info, s);
2043 continue;
2044 }
2045
0451c93c
MS		 2046 /* Allocate memory for the section contents. We use bfd_zalloc
2047 here in case unused entries are not reclaimed before the
2048 section's contents are written out. This should not happen,
2049 but this way if it does, we get a R_390_NONE reloc instead
2050 of garbage. */
2051 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2052 if (s->contents == NULL)
b34976b6 2053 return FALSE;
a85d7ed0 2054 }
ec338859 2055
0451c93c 2056 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 2057 {
2058 /* Add some entries to the .dynamic section. We fill in the
2059 values later, in elf_s390_finish_dynamic_sections, but we
2060 must add the entries now so that we get the correct size for
2061 the .dynamic section. The DT_DEBUG entry is filled in by the
2062 dynamic linker and used by the debugger. */
dc810e39
AM		 2063#define add_dynamic_entry(TAG, VAL) \
2064 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
ec338859 2065
a85d7ed0
NC		 2066 if (! info->shared)
2067 {
dc810e39 2068 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2069 return FALSE;
a85d7ed0 2070 }
ec338859 2071
0451c93c 2072 if (htab->splt->_raw_size != 0)
a85d7ed0 2073 {
dc810e39
AM		 2074 if (!add_dynamic_entry (DT_PLTGOT, 0)
2075 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2076 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2077 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 2078 return FALSE;
a85d7ed0 2079 }
ec338859 2080
a85d7ed0
NC		 2081 if (relocs)
2082 {
dc810e39
AM		 2083 if (!add_dynamic_entry (DT_RELA, 0)
2084 || !add_dynamic_entry (DT_RELASZ, 0)
2085 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
b34976b6 2086 return FALSE;
a85d7ed0 2087
0451c93c
MS		 2088 /* If any dynamic relocs apply to a read-only section,
2089 then we need a DT_TEXTREL entry. */
248866a8
AM		 2090 if ((info->flags & DF_TEXTREL) == 0)
2091 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2092 (PTR) info);
ec338859 2093
0451c93c
MS		 2094 if ((info->flags & DF_TEXTREL) != 0)
2095 {
2096 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2097 return FALSE;
0451c93c 2098 }
a85d7ed0
NC		 2099 }
2100 }
dc810e39 2101#undef add_dynamic_entry
ec338859 2102
b34976b6 2103 return TRUE;
a85d7ed0
NC		 2104}
2105
69fc87f1
MS		 2106/* Return the base VMA address which should be subtracted from real addresses
2107 when resolving @dtpoff relocation.
2108 This is PT_TLS segment p_vaddr. */
2109
2110static bfd_vma
2111dtpoff_base (info)
2112 struct bfd_link_info *info;
2113{
2114 /* If tls_segment is NULL, we should have signalled an error already. */
2115 if (elf_hash_table (info)->tls_segment == NULL)
2116 return 0;
2117 return elf_hash_table (info)->tls_segment->start;
2118}
2119
2120/* Return the relocation value for @tpoff relocation
2121 if STT_TLS virtual address is ADDRESS. */
2122
2123static bfd_vma
2124tpoff (info, address)
2125 struct bfd_link_info *info;
2126 bfd_vma address;
2127{
2128 struct elf_link_tls_segment *tls_segment
2129 = elf_hash_table (info)->tls_segment;
2130
2131 /* If tls_segment is NULL, we should have signalled an error already. */
2132 if (tls_segment == NULL)
2133 return 0;
2134 return (align_power (tls_segment->size, tls_segment->align)
2135 + tls_segment->start - address);
2136}
2137
2138/* Complain if TLS instruction relocation is against an invalid
2139 instruction. */
2140
2141static void
2142invalid_tls_insn (input_bfd, input_section, rel)
2143 bfd *input_bfd;
2144 asection *input_section;
2145 Elf_Internal_Rela *rel;
2146{
2147 reloc_howto_type *howto;
2148
2149 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2150 (*_bfd_error_handler)
2151 (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"),
2152 bfd_archive_filename (input_bfd),
2153 bfd_get_section_name (input_bfd, input_section),
2154 (long) rel->r_offset,
2155 howto->name);
2156}
2157
a85d7ed0
NC		 2158/* Relocate a 390 ELF section. */
2159
b34976b6 2160static bfd_boolean
a85d7ed0
NC		 2161elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2162 contents, relocs, local_syms, local_sections)
2163 bfd *output_bfd;
2164 struct bfd_link_info *info;
2165 bfd *input_bfd;
2166 asection *input_section;
2167 bfd_byte *contents;
2168 Elf_Internal_Rela *relocs;
2169 Elf_Internal_Sym *local_syms;
2170 asection **local_sections;
2171{
0451c93c 2172 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 2173 Elf_Internal_Shdr *symtab_hdr;
2174 struct elf_link_hash_entry **sym_hashes;
2175 bfd_vma *local_got_offsets;
a85d7ed0
NC		 2176 Elf_Internal_Rela *rel;
2177 Elf_Internal_Rela *relend;
2178
b491616a 2179 if (info->relocateable)
b34976b6 2180 return TRUE;
b491616a 2181
0451c93c 2182 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 2183 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2184 sym_hashes = elf_sym_hashes (input_bfd);
2185 local_got_offsets = elf_local_got_offsets (input_bfd);
2186
a85d7ed0
NC		 2187 rel = relocs;
2188 relend = relocs + input_section->reloc_count;
2189 for (; rel < relend; rel++)
2190 {
5236c819 2191 unsigned int r_type;
a85d7ed0
NC		 2192 reloc_howto_type *howto;
2193 unsigned long r_symndx;
2194 struct elf_link_hash_entry *h;
2195 Elf_Internal_Sym *sym;
2196 asection *sec;
0451c93c 2197 bfd_vma off;
a85d7ed0 2198 bfd_vma relocation;
b34976b6 2199 bfd_boolean unresolved_reloc;
a85d7ed0 2200 bfd_reloc_status_type r;
69fc87f1 2201 int tls_type;
ec338859 2202
a85d7ed0
NC		 2203 r_type = ELF32_R_TYPE (rel->r_info);
2204 if (r_type == (int) R_390_GNU_VTINHERIT
2205 || r_type == (int) R_390_GNU_VTENTRY)
2206 continue;
5236c819 2207 if (r_type >= (int) R_390_max)
a85d7ed0
NC		 2208 {
2209 bfd_set_error (bfd_error_bad_value);
b34976b6 2210 return FALSE;
a85d7ed0 2211 }
ec338859 2212
b491616a 2213 howto = elf_howto_table + r_type;
a85d7ed0 2214 r_symndx = ELF32_R_SYM (rel->r_info);
5236c819
MS		 2215
2216 /* This is a final link. */
a85d7ed0
NC		 2217 h = NULL;
2218 sym = NULL;
2219 sec = NULL;
b34976b6 2220 unresolved_reloc = FALSE;
a85d7ed0
NC		 2221 if (r_symndx < symtab_hdr->sh_info)
2222 {
2223 sym = local_syms + r_symndx;
2224 sec = local_sections[r_symndx];
f8df10f4 2225 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
a85d7ed0
NC		 2226 }
2227 else
2228 {
2229 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2230 while (h->root.type == bfd_link_hash_indirect
2231 || h->root.type == bfd_link_hash_warning)
2232 h = (struct elf_link_hash_entry *) h->root.u.i.link;
ec338859 2233
a85d7ed0
NC		 2234 if (h->root.type == bfd_link_hash_defined
2235 || h->root.type == bfd_link_hash_defweak)
2236 {
2237 sec = h->root.u.def.section;
27018c3f 2238 if (sec->output_section == NULL)
a85d7ed0 2239 {
0451c93c
MS		 2240 /* Set a flag that will be cleared later if we find a
2241 relocation value for this symbol. output_section
2242 is typically NULL for symbols satisfied by a shared
2243 library. */
b34976b6 2244 unresolved_reloc = TRUE;
a85d7ed0
NC		 2245 relocation = 0;
2246 }
2247 else
2248 relocation = (h->root.u.def.value
2249 + sec->output_section->vma
2250 + sec->output_offset);
2251 }
2252 else if (h->root.type == bfd_link_hash_undefweak)
2253 relocation = 0;
671bae9c
NC		 2254 else if (info->shared
2255 && (!info->symbolic || info->allow_shlib_undefined)
a85d7ed0
NC		 2256 && !info->no_undefined
2257 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2258 relocation = 0;
2259 else
2260 {
2261 if (! ((*info->callbacks->undefined_symbol)
2262 (info, h->root.root.string, input_bfd,
2263 input_section, rel->r_offset,
0451c93c
MS		 2264 (!info->shared || info->no_undefined
2265 || ELF_ST_VISIBILITY (h->other)))))
b34976b6 2266 return FALSE;
a85d7ed0
NC		 2267 relocation = 0;
2268 }
2269 }
ec338859 2270
a85d7ed0
NC		 2271 switch (r_type)
2272 {
5236c819
MS		 2273 case R_390_GOTPLT12:
2274 case R_390_GOTPLT16:
2275 case R_390_GOTPLT32:
2276 case R_390_GOTPLTENT:
2277 /* There are three cases for a GOTPLT relocation. 1) The
2278 relocation is against the jump slot entry of a plt that
2279 will get emitted to the output file. 2) The relocation
2280 is against the jump slot of a plt entry that has been
2281 removed. elf_s390_adjust_gotplt has created a GOT entry
2282 as replacement. 3) The relocation is against a local symbol.
2283 Cases 2) and 3) are the same as the GOT relocation code
2284 so we just have to test for case 1 and fall through for
2285 the other two. */
2286 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2287 {
2288 bfd_vma plt_index;
2289
2290 /* Calc. index no.
2291 Current offset - size first entry / entry size. */
2292 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2293 PLT_ENTRY_SIZE;
2294
2295 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2296 addr & GOT addr. */
2297 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2298 unresolved_reloc = FALSE;
2299
2300 if (r_type == R_390_GOTPLTENT)
2301 relocation += htab->sgot->output_section->vma;
2302 break;
2303 }
2304 /* Fall through. */
2305
a85d7ed0
NC		 2306 case R_390_GOT12:
2307 case R_390_GOT16:
2308 case R_390_GOT32:
befc3abb 2309 case R_390_GOTENT:
a85d7ed0
NC		 2310 /* Relocation is to the entry for this symbol in the global
2311 offset table. */
0451c93c
MS		 2312 if (htab->sgot == NULL)
2313 abort ();
ec338859 2314
a85d7ed0
NC		 2315 if (h != NULL)
2316 {
b34976b6 2317 bfd_boolean dyn;
ec338859 2318
a85d7ed0 2319 off = h->got.offset;
0451c93c
MS		 2320 dyn = htab->elf.dynamic_sections_created;
2321 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
a85d7ed0 2322 || (info->shared
0451c93c
MS		 2323 && (info->symbolic
2324 || h->dynindx == -1
2325 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
a85d7ed0
NC		 2326 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2327 {
2328 /* This is actually a static link, or it is a
2329 -Bsymbolic link and the symbol is defined
2330 locally, or the symbol was forced to be local
2331 because of a version file. We must initialize
2332 this entry in the global offset table. Since the
2333 offset must always be a multiple of 2, we use the
2334 least significant bit to record whether we have
2335 initialized it already.
2336
2337 When doing a dynamic link, we create a .rel.got
2338 relocation entry to initialize the value. This
2339 is done in the finish_dynamic_symbol routine. */
2340 if ((off & 1) != 0)
2341 off &= ~1;
2342 else
2343 {
2344 bfd_put_32 (output_bfd, relocation,
0451c93c 2345 htab->sgot->contents + off);
a85d7ed0
NC		 2346 h->got.offset |= 1;
2347 }
2348 }
0451c93c 2349 else
b34976b6 2350 unresolved_reloc = FALSE;
a85d7ed0
NC		 2351 }
2352 else
2353 {
0451c93c
MS		 2354 if (local_got_offsets == NULL)
2355 abort ();
a85d7ed0
NC		 2356
2357 off = local_got_offsets[r_symndx];
2358
2359 /* The offset must always be a multiple of 4. We use
2360 the least significant bit to record whether we have
2361 already generated the necessary reloc. */
2362 if ((off & 1) != 0)
2363 off &= ~1;
2364 else
2365 {
0451c93c
MS		 2366 bfd_put_32 (output_bfd, relocation,
2367 htab->sgot->contents + off);
a85d7ed0
NC		 2368
2369 if (info->shared)
2370 {
2371 asection *srelgot;
2372 Elf_Internal_Rela outrel;
947216bf 2373 bfd_byte *loc;
a85d7ed0 2374
0451c93c
MS		 2375 srelgot = htab->srelgot;
2376 if (srelgot == NULL)
2377 abort ();
a85d7ed0 2378
0451c93c
MS		 2379 outrel.r_offset = (htab->sgot->output_section->vma
2380 + htab->sgot->output_offset
a85d7ed0
NC		 2381 + off);
2382 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2383 outrel.r_addend = relocation;
947216bf
AM		 2384 loc = srelgot->contents;
2385 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
0451c93c 2386 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
a85d7ed0
NC		 2387 }
2388
2389 local_got_offsets[r_symndx] |= 1;
2390 }
a85d7ed0
NC		 2391 }
2392
0451c93c
MS		 2393 if (off >= (bfd_vma) -2)
2394 abort ();
a85d7ed0 2395
0451c93c 2396 relocation = htab->sgot->output_offset + off;
befc3abb
MS		 2397
2398 /*
2399 * For @GOTENT the relocation is against the offset between
2400 * the instruction and the symbols entry in the GOT and not
2401 * between the start of the GOT and the symbols entry. We
2402 * add the vma of the GOT to get the correct value.
2403 */
5236c819
MS		 2404 if ( r_type == R_390_GOTENT
2405 || r_type == R_390_GOTPLTENT)
befc3abb
MS		 2406 relocation += htab->sgot->output_section->vma;
2407
a85d7ed0 2408 break;
dc810e39 2409
5236c819
MS		 2410 case R_390_GOTOFF16:
2411 case R_390_GOTOFF32:
a85d7ed0
NC		 2412 /* Relocation is relative to the start of the global offset
2413 table. */
2414
a85d7ed0
NC		 2415 /* Note that sgot->output_offset is not involved in this
2416 calculation. We always want the start of .got. If we
2417 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2418 permitted by the ABI, we might have to change this
2419 calculation. */
0451c93c 2420 relocation -= htab->sgot->output_section->vma;
a85d7ed0
NC		 2421 break;
2422
2423 case R_390_GOTPC:
befc3abb 2424 case R_390_GOTPCDBL:
a85d7ed0 2425 /* Use global offset table as symbol value. */
0451c93c 2426 relocation = htab->sgot->output_section->vma;
b34976b6 2427 unresolved_reloc = FALSE;
a85d7ed0
NC		 2428 break;
2429
2430 case R_390_PLT16DBL:
befc3abb 2431 case R_390_PLT32DBL:
a85d7ed0
NC		 2432 case R_390_PLT32:
2433 /* Relocation is to the entry for this symbol in the
2434 procedure linkage table. */
2435
2436 /* Resolve a PLT32 reloc against a local symbol directly,
2437 without using the procedure linkage table. */
2438 if (h == NULL)
2439 break;
2440
0451c93c
MS		 2441 if (h->plt.offset == (bfd_vma) -1
2442 || htab->splt == NULL)
a85d7ed0
NC		 2443 {
2444 /* We didn't make a PLT entry for this symbol. This
2445 happens when statically linking PIC code, or when
2446 using -Bsymbolic. */
2447 break;
2448 }
2449
0451c93c
MS		 2450 relocation = (htab->splt->output_section->vma
2451 + htab->splt->output_offset
a85d7ed0 2452 + h->plt.offset);
b34976b6 2453 unresolved_reloc = FALSE;
a85d7ed0
NC		 2454 break;
2455
5236c819
MS		 2456 case R_390_PLTOFF16:
2457 case R_390_PLTOFF32:
2458 /* Relocation is to the entry for this symbol in the
2459 procedure linkage table relative to the start of the GOT. */
2460
2461 /* For local symbols or if we didn't make a PLT entry for
2462 this symbol resolve the symbol directly. */
2463 if ( h == NULL
2464 || h->plt.offset == (bfd_vma) -1
2465 || htab->splt == NULL)
2466 {
2467 relocation -= htab->sgot->output_section->vma;
2468 break;
2469 }
2470
2471 relocation = (htab->splt->output_section->vma
2472 + htab->splt->output_offset
2473 + h->plt.offset
2474 - htab->sgot->output_section->vma);
2475 unresolved_reloc = FALSE;
2476 break;
2477
a85d7ed0
NC		 2478 case R_390_8:
2479 case R_390_16:
2480 case R_390_32:
2481 case R_390_PC16:
2482 case R_390_PC16DBL:
befc3abb 2483 case R_390_PC32DBL:
a85d7ed0 2484 case R_390_PC32:
ec338859
AM		 2485 /* r_symndx will be zero only for relocs against symbols
2486 from removed linkonce sections, or sections discarded by
2487 a linker script. */
2488 if (r_symndx == 0
2489 || (input_section->flags & SEC_ALLOC) == 0)
2490 break;
2491
0451c93c 2492 if ((info->shared
0451c93c
MS		 2493 && ((r_type != R_390_PC16
2494 && r_type != R_390_PC16DBL
befc3abb 2495 && r_type != R_390_PC32DBL
0451c93c
MS		 2496 && r_type != R_390_PC32)
2497 || (h != NULL
2498 && h->dynindx != -1
2499 && (! info->symbolic
2500 || (h->elf_link_hash_flags
2501 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2502 || (!info->shared
0451c93c
MS		 2503 && h != NULL
2504 && h->dynindx != -1
2505 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2506 && (((h->elf_link_hash_flags
2507 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2508 && (h->elf_link_hash_flags
2509 & ELF_LINK_HASH_DEF_REGULAR) == 0)
2510 || h->root.type == bfd_link_hash_undefweak
2511 || h->root.type == bfd_link_hash_undefined)))
a85d7ed0
NC		 2512 {
2513 Elf_Internal_Rela outrel;
b34976b6 2514 bfd_boolean skip, relocate;
0451c93c 2515 asection *sreloc;
947216bf 2516 bfd_byte *loc;
ec338859 2517
0451c93c
MS		 2518 /* When generating a shared object, these relocations
2519 are copied into the output file to be resolved at run
2520 time. */
ec338859 2521
b34976b6
AM		 2522 skip = FALSE;
2523 relocate = FALSE;
ec338859 2524
c629eae0
JJ		 2525 outrel.r_offset =
2526 _bfd_elf_section_offset (output_bfd, info, input_section,
2527 rel->r_offset);
2528 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2529 skip = TRUE;
0bb2d96a 2530 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2531 skip = TRUE, relocate = TRUE;
a85d7ed0
NC		 2532 outrel.r_offset += (input_section->output_section->vma
2533 + input_section->output_offset);
ec338859 2534
a85d7ed0 2535 if (skip)
0bb2d96a 2536 memset (&outrel, 0, sizeof outrel);
0451c93c
MS		 2537 else if (h != NULL
2538 && h->dynindx != -1
2539 && (r_type == R_390_PC16
2540 || r_type == R_390_PC16DBL
befc3abb 2541 || r_type == R_390_PC32DBL
0451c93c
MS		 2542 || r_type == R_390_PC32
2543 || !info->shared
2544 || !info->symbolic
2545 || (h->elf_link_hash_flags
2546 & ELF_LINK_HASH_DEF_REGULAR) == 0))
a85d7ed0 2547 {
a85d7ed0 2548 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
27018c3f 2549 outrel.r_addend = rel->r_addend;
a85d7ed0
NC		 2550 }
2551 else
2552 {
0451c93c 2553 /* This symbol is local, or marked to become local. */
b34976b6 2554 relocate = TRUE;
0451c93c
MS		 2555 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2556 outrel.r_addend = relocation + rel->r_addend;
a85d7ed0 2557 }
ec338859 2558
0451c93c
MS		 2559 sreloc = elf_section_data (input_section)->sreloc;
2560 if (sreloc == NULL)
2561 abort ();
ec338859 2562
947216bf
AM		 2563 loc = sreloc->contents;
2564 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
0451c93c 2565 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
ec338859 2566
a85d7ed0
NC		 2567 /* If this reloc is against an external symbol, we do
2568 not want to fiddle with the addend. Otherwise, we
2569 need to include the symbol value so that it becomes
2570 an addend for the dynamic reloc. */
2571 if (! relocate)
2572 continue;
2573 }
0451c93c 2574 break;
ec338859 2575
69fc87f1
MS		 2576 /* Relocations for tls literal pool entries. */
2577 case R_390_TLS_IE32:
2578 if (info->shared)
2579 {
2580 Elf_Internal_Rela outrel;
2581 asection *sreloc;
2582 bfd_byte *loc;
2583
2584 outrel.r_offset = rel->r_offset
2585 + input_section->output_section->vma
2586 + input_section->output_offset;
2587 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2588 sreloc = elf_section_data (input_section)->sreloc;
2589 if (sreloc == NULL)
2590 abort ();
2591 loc = sreloc->contents;
2592 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2593 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2594 }
2595 /* Fall through */
2596
2597 case R_390_TLS_GD32:
2598 case R_390_TLS_GOTIE32:
2599 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2600 tls_type = GOT_UNKNOWN;
2601 if (h == NULL && local_got_offsets)
2602 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2603 else if (h != NULL)
2604 {
2605 tls_type = elf_s390_hash_entry(h)->tls_type;
2606 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2607 r_type = R_390_TLS_LE32;
2608 }
2609 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2610 r_type = R_390_TLS_IE32;
2611
2612 if (r_type == R_390_TLS_LE32)
2613 {
2614 /* This relocation gets optimized away by the local exec
2615 access optimization. */
2616 BFD_ASSERT (! unresolved_reloc);
2617 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2618 contents + rel->r_offset);
2619 continue;
2620 }
2621
2622 if (htab->sgot == NULL)
2623 abort ();
2624
2625 if (h != NULL)
2626 off = h->got.offset;
2627 else
2628 {
2629 if (local_got_offsets == NULL)
2630 abort ();
2631
2632 off = local_got_offsets[r_symndx];
2633 }
2634
2635 emit_tls_relocs:
2636
2637 if ((off & 1) != 0)
2638 off &= ~1;
2639 else
2640 {
2641 Elf_Internal_Rela outrel;
2642 bfd_byte *loc;
2643 int dr_type, indx;
2644
2645 if (htab->srelgot == NULL)
2646 abort ();
2647
2648 outrel.r_offset = (htab->sgot->output_section->vma
2649 + htab->sgot->output_offset + off);
2650
2651 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2652 if (r_type == R_390_TLS_GD32)
2653 dr_type = R_390_TLS_DTPMOD;
2654 else
2655 dr_type = R_390_TLS_TPOFF;
2656 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2657 outrel.r_addend = relocation - dtpoff_base (info);
2658 else
2659 outrel.r_addend = 0;
2660 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2661 loc = htab->srelgot->contents;
2662 loc += htab->srelgot->reloc_count++
2663 * sizeof (Elf32_External_Rela);
2664 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2665
2666 if (r_type == R_390_TLS_GD32)
2667 {
2668 if (indx == 0)
2669 {
2670 BFD_ASSERT (! unresolved_reloc);
2671 bfd_put_32 (output_bfd,
2672 relocation - dtpoff_base (info),
2673 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2674 }
2675 else
2676 {
2677 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2678 outrel.r_offset += GOT_ENTRY_SIZE;
2679 outrel.r_addend = 0;
2680 htab->srelgot->reloc_count++;
2681 loc += sizeof (Elf32_External_Rela);
2682 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2683 }
2684 }
2685
2686 if (h != NULL)
2687 h->got.offset |= 1;
2688 else
2689 local_got_offsets[r_symndx] |= 1;
2690 }
2691
2692 if (off >= (bfd_vma) -2)
2693 abort ();
2694 if (r_type == ELF32_R_TYPE (rel->r_info))
2695 {
2696 relocation = htab->sgot->output_offset + off;
2697 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2698 relocation += htab->sgot->output_section->vma;
2699 unresolved_reloc = FALSE;
2700 }
2701 else
2702 {
2703 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2704 contents + rel->r_offset);
2705 continue;
2706 }
2707 break;
2708
2709 case R_390_TLS_GOTIE12:
2710 case R_390_TLS_IEENT:
2711 if (h == NULL)
2712 {
2713 if (local_got_offsets == NULL)
2714 abort();
2715 off = local_got_offsets[r_symndx];
2716 if (info->shared)
2717 goto emit_tls_relocs;
2718 }
2719 else
2720 {
2721 off = h->got.offset;
2722 tls_type = elf_s390_hash_entry(h)->tls_type;
2723 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2724 goto emit_tls_relocs;
2725 }
2726
2727 if (htab->sgot == NULL)
2728 abort ();
2729
2730 BFD_ASSERT (! unresolved_reloc);
2731 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2732 htab->sgot->contents + off);
2733 relocation = htab->sgot->output_offset + off;
2734 if (r_type == R_390_TLS_IEENT)
2735 relocation += htab->sgot->output_section->vma;
2736 unresolved_reloc = FALSE;
2737 break;
2738
2739 case R_390_TLS_LDM32:
2740 if (! info->shared)
2741 /* The literal pool entry this relocation refers to gets ignored
2742 by the optimized code of the local exec model. Do nothing
2743 and the value will turn out zero. */
2744 continue;
2745
2746 if (htab->sgot == NULL)
2747 abort ();
2748
2749 off = htab->tls_ldm_got.offset;
2750 if (off & 1)
2751 off &= ~1;
2752 else
2753 {
2754 Elf_Internal_Rela outrel;
2755 bfd_byte *loc;
2756
2757 if (htab->srelgot == NULL)
2758 abort ();
2759
2760 outrel.r_offset = (htab->sgot->output_section->vma
2761 + htab->sgot->output_offset + off);
2762
2763 bfd_put_32 (output_bfd, 0,
2764 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2765 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2766 outrel.r_addend = 0;
2767 loc = htab->srelgot->contents;
2768 loc += htab->srelgot->reloc_count++
2769 * sizeof (Elf32_External_Rela);
2770 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2771 htab->tls_ldm_got.offset |= 1;
2772 }
2773 relocation = htab->sgot->output_offset + off;
2774 unresolved_reloc = FALSE;
2775 break;
2776
2777 case R_390_TLS_LE32:
2778 if (info->shared)
2779 {
2780 /* Linking a shared library with non-fpic code requires
2781 a R_390_TLS_TPOFF relocation. */
2782 Elf_Internal_Rela outrel;
2783 asection *sreloc;
2784 bfd_byte *loc;
2785 int indx;
2786
2787 outrel.r_offset = rel->r_offset
2788 + input_section->output_section->vma
2789 + input_section->output_offset;
2790 if (h != NULL && h->dynindx != -1)
2791 indx = h->dynindx;
2792 else
2793 indx = 0;
2794 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2795 if (indx == 0)
2796 outrel.r_addend = relocation - dtpoff_base (info);
2797 else
2798 outrel.r_addend = 0;
2799 sreloc = elf_section_data (input_section)->sreloc;
2800 if (sreloc == NULL)
2801 abort ();
2802 loc = sreloc->contents;
2803 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2804 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2805 }
2806 else
2807 {
2808 BFD_ASSERT (! unresolved_reloc);
2809 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2810 contents + rel->r_offset);
2811 }
2812 continue;
2813
2814 case R_390_TLS_LDO32:
2815 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2816 relocation -= dtpoff_base (info);
2817 else
2818 /* When converting LDO to LE, we must negate. */
2819 relocation = -tpoff (info, relocation);
2820 break;
2821
2822 /* Relocations for tls instructions. */
2823 case R_390_TLS_LOAD:
2824 case R_390_TLS_GDCALL:
2825 case R_390_TLS_LDCALL:
2826 tls_type = GOT_UNKNOWN;
2827 if (h == NULL && local_got_offsets)
2828 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2829 else if (h != NULL)
2830 tls_type = elf_s390_hash_entry(h)->tls_type;
2831
2832 if (tls_type == GOT_TLS_GD)
2833 continue;
2834
2835 if (r_type == R_390_TLS_LOAD)
2836 {
2837 if (!info->shared && (h == NULL || h->dynindx == -1))
2838 {
2839 /* IE->LE transition. Four valid cases:
2840 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2841 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2842 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2843 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2844 unsigned int insn, ry;
2845
2846 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2847 ry = 0;
2848 if ((insn & 0xff00f000) == 0x58000000)
2849 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2850 ry = (insn & 0x000f0000);
2851 else if ((insn & 0xff0f0000) == 0x58000000)
2852 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2853 ry = (insn & 0x0000f000) << 4;
2854 else if ((insn & 0xff00f000) == 0x5800c000)
2855 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2856 ry = (insn & 0x000f0000);
2857 else if ((insn & 0xff0f0000) == 0x580c0000)
2858 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2859 ry = (insn & 0x0000f000) << 4;
2860 else
2861 invalid_tls_insn (input_bfd, input_section, rel);
2862 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2863 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2864 }
2865 }
2866 else if (r_type == R_390_TLS_GDCALL)
2867 {
2868 unsigned int insn;
2869
2870 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2871 if ((insn & 0xff000fff) != 0x4d000000)
2872 invalid_tls_insn (input_bfd, input_section, rel);
2873 if (!info->shared && (h == NULL || h->dynindx == -1))
2874 /* GD->LE transition.
2875 bas %r14,0(%rx,%r13) -> bc 0,0 */
2876 insn = 0x47000000;
2877 else
2878 /* GD->IE transition.
2879 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2880 insn = 0x5822c000;
2881 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2882 }
2883 else if (r_type == R_390_TLS_LDCALL)
2884 {
2885 if (!info->shared)
2886 {
2887 unsigned int insn;
2888
2889 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2890 if ((insn & 0xff000fff) != 0x4d000000)
2891 invalid_tls_insn (input_bfd, input_section, rel);
2892 /* LD->LE transition.
2893 bas %r14,0(%rx,%r13) -> bc 0,0 */
2894 insn = 0x47000000;
2895 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2896 }
2897 }
2898 continue;
2899
0451c93c
MS		 2900 default:
2901 break;
2902 }
ec338859 2903
239e1f3a
AM		 2904 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2905 because such sections are not SEC_ALLOC and thus ld.so will
2906 not process them. */
0451c93c 2907 if (unresolved_reloc
239e1f3a 2908 && !((input_section->flags & SEC_DEBUGGING) != 0
0451c93c
MS		 2909 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2910 (*_bfd_error_handler)
2911 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2912 bfd_archive_filename (input_bfd),
2913 bfd_get_section_name (input_bfd, input_section),
2914 (long) rel->r_offset,
2915 h->root.root.string);
ec338859 2916
a85d7ed0 2917 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
0451c93c
MS		 2918 contents, rel->r_offset,
2919 relocation, rel->r_addend);
ec338859 2920
a85d7ed0
NC		 2921 if (r != bfd_reloc_ok)
2922 {
0451c93c 2923 const char *name;
ec338859 2924
0451c93c
MS		 2925 if (h != NULL)
2926 name = h->root.root.string;
2927 else
a85d7ed0 2928 {
0451c93c
MS		 2929 name = bfd_elf_string_from_elf_section (input_bfd,
2930 symtab_hdr->sh_link,
2931 sym->st_name);
2932 if (name == NULL)
b34976b6 2933 return FALSE;
0451c93c
MS		 2934 if (*name == '\0')
2935 name = bfd_section_name (input_bfd, sec);
2936 }
ec338859 2937
0451c93c
MS		 2938 if (r == bfd_reloc_overflow)
2939 {
ec338859 2940
0451c93c
MS		 2941 if (! ((*info->callbacks->reloc_overflow)
2942 (info, name, howto->name, (bfd_vma) 0,
2943 input_bfd, input_section, rel->r_offset)))
b34976b6 2944 return FALSE;
0451c93c
MS		 2945 }
2946 else
2947 {
2948 (*_bfd_error_handler)
2949 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2950 bfd_archive_filename (input_bfd),
2951 bfd_get_section_name (input_bfd, input_section),
2952 (long) rel->r_offset, name, (int) r);
b34976b6 2953 return FALSE;
a85d7ed0
NC		 2954 }
2955 }
2956 }
ec338859 2957
b34976b6 2958 return TRUE;
a85d7ed0
NC		 2959}
2960
2961/* Finish up dynamic symbol handling. We set the contents of various
2962 dynamic sections here. */
2963
b34976b6 2964static bfd_boolean
a85d7ed0
NC		 2965elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
2966 bfd *output_bfd;
2967 struct bfd_link_info *info;
2968 struct elf_link_hash_entry *h;
2969 Elf_Internal_Sym *sym;
2970{
0451c93c 2971 struct elf_s390_link_hash_table *htab;
ec338859 2972
0451c93c 2973 htab = elf_s390_hash_table (info);
ec338859 2974
a85d7ed0
NC		 2975 if (h->plt.offset != (bfd_vma) -1)
2976 {
0451c93c
MS		 2977 bfd_vma plt_index;
2978 bfd_vma got_offset;
a85d7ed0 2979 Elf_Internal_Rela rela;
947216bf 2980 bfd_byte *loc;
a85d7ed0 2981 bfd_vma relative_offset;
ec338859 2982
a85d7ed0
NC		 2983 /* This symbol has an entry in the procedure linkage table. Set
2984 it up. */
ec338859 2985
0451c93c
MS		 2986 if (h->dynindx == -1
2987 || htab->splt == NULL
2988 || htab->sgotplt == NULL
2989 || htab->srelplt == NULL)
2990 abort ();
a85d7ed0 2991
dc810e39 2992 /* Calc. index no.
a85d7ed0
NC		 2993 Current offset - size first entry / entry size. */
2994 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
2995
2996 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2997 addr & GOT addr. */
2998 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
2999
3000 /* S390 uses halfwords for relative branch calc! */
dc810e39
AM		 3001 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3002 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
a85d7ed0
NC		 3003 /* If offset is > 32768, branch to a previous branch
3004 390 can only handle +-64 K jumps. */
dc810e39
AM		 3005 if ( -32768 > (int) relative_offset )
3006 relative_offset =
3007 -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
a85d7ed0
NC		 3008
3009 /* Fill in the entry in the procedure linkage table. */
3010 if (!info->shared)
0451c93c
MS		 3011 {
3012 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3013 htab->splt->contents + h->plt.offset);
3014 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3015 htab->splt->contents + h->plt.offset + 4);
3016 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3017 htab->splt->contents + h->plt.offset + 8);
3018 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3019 htab->splt->contents + h->plt.offset + 12);
3020 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3021 htab->splt->contents + h->plt.offset + 16);
3022 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3023 htab->splt->contents + h->plt.offset + 20);
3024 bfd_put_32 (output_bfd,
3025 (htab->sgotplt->output_section->vma
3026 + htab->sgotplt->output_offset
3027 + got_offset),
3028 htab->splt->contents + h->plt.offset + 24);
3029 }
a85d7ed0 3030 else if (got_offset < 4096)
0451c93c
MS		 3031 {
3032 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3033 htab->splt->contents + h->plt.offset);
3034 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3035 htab->splt->contents + h->plt.offset + 4);
3036 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3037 htab->splt->contents + h->plt.offset + 8);
3038 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3039 htab->splt->contents + h->plt.offset + 12);
3040 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3041 htab->splt->contents + h->plt.offset + 16);
3042 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3043 htab->splt->contents + h->plt.offset + 20);
3044 bfd_put_32 (output_bfd, (bfd_vma) 0,
3045 htab->splt->contents + h->plt.offset + 24);
3046 }
a85d7ed0 3047 else if (got_offset < 32768)
0451c93c
MS		 3048 {
3049 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3050 htab->splt->contents + h->plt.offset);
3051 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3052 htab->splt->contents + h->plt.offset + 4);
3053 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3054 htab->splt->contents + h->plt.offset + 8);
3055 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3056 htab->splt->contents + h->plt.offset + 12);
3057 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3058 htab->splt->contents + h->plt.offset + 16);
3059 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3060 htab->splt->contents + h->plt.offset + 20);
3061 bfd_put_32 (output_bfd, (bfd_vma) 0,
3062 htab->splt->contents + h->plt.offset + 24);
3063 }
a85d7ed0 3064 else
0451c93c
MS		 3065 {
3066 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3067 htab->splt->contents + h->plt.offset);
3068 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3069 htab->splt->contents + h->plt.offset + 4);
3070 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3071 htab->splt->contents + h->plt.offset + 8);
3072 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3073 htab->splt->contents + h->plt.offset + 12);
3074 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3075 htab->splt->contents + h->plt.offset + 16);
3076 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3077 htab->splt->contents + h->plt.offset + 20);
3078 bfd_put_32 (output_bfd, got_offset,
3079 htab->splt->contents + h->plt.offset + 24);
3080 }
a85d7ed0
NC		 3081 /* Insert offset into reloc. table here. */
3082 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
0451c93c 3083 htab->splt->contents + h->plt.offset + 28);
a85d7ed0
NC		 3084
3085 /* Fill in the entry in the global offset table.
3086 Points to instruction after GOT offset. */
3087 bfd_put_32 (output_bfd,
0451c93c
MS		 3088 (htab->splt->output_section->vma
3089 + htab->splt->output_offset
a85d7ed0
NC		 3090 + h->plt.offset
3091 + 12),
0451c93c 3092 htab->sgotplt->contents + got_offset);
a85d7ed0 3093
0451c93c
MS		 3094 /* Fill in the entry in the .rela.plt section. */
3095 rela.r_offset = (htab->sgotplt->output_section->vma
3096 + htab->sgotplt->output_offset
3097 + got_offset);
3098 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3099 rela.r_addend = 0;
947216bf 3100 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
0451c93c 3101 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
ec338859 3102
a85d7ed0
NC		 3103 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3104 {
3105 /* Mark the symbol as undefined, rather than as defined in
0451c93c
MS		 3106 the .plt section. Leave the value alone. This is a clue
3107 for the dynamic linker, to make function pointer
3108 comparisons work between an application and shared
ec338859 3109 library. */
a85d7ed0
NC		 3110 sym->st_shndx = SHN_UNDEF;
3111 }
3112 }
ec338859 3113
69fc87f1
MS		 3114 if (h->got.offset != (bfd_vma) -1
3115 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3116 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3117 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
a85d7ed0 3118 {
a85d7ed0 3119 Elf_Internal_Rela rela;
947216bf 3120 bfd_byte *loc;
a85d7ed0
NC		 3121
3122 /* This symbol has an entry in the global offset table. Set it
3123 up. */
3124
0451c93c
MS		 3125 if (htab->sgot == NULL || htab->srelgot == NULL)
3126 abort ();
a85d7ed0 3127
0451c93c
MS		 3128 rela.r_offset = (htab->sgot->output_section->vma
3129 + htab->sgot->output_offset
dc810e39 3130 + (h->got.offset &~ (bfd_vma) 1));
a85d7ed0
NC		 3131
3132 /* If this is a static link, or it is a -Bsymbolic link and the
3133 symbol is defined locally or was forced to be local because
3134 of a version file, we just want to emit a RELATIVE reloc.
3135 The entry in the global offset table will already have been
3136 initialized in the relocate_section function. */
0451c93c
MS		 3137 if (info->shared
3138 && (info->symbolic
3139 || h->dynindx == -1
3140 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
3141 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3142 {
3143 BFD_ASSERT((h->got.offset & 1) != 0);
3144 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3145 rela.r_addend = (h->root.u.def.value
a85d7ed0
NC		 3146 + h->root.u.def.section->output_section->vma
3147 + h->root.u.def.section->output_offset);
3148 }
3149 else
3150 {
3151 BFD_ASSERT((h->got.offset & 1) == 0);
0451c93c 3152 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
a85d7ed0
NC		 3153 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3154 rela.r_addend = 0;
3155 }
3156
947216bf
AM		 3157 loc = htab->srelgot->contents;
3158 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
0451c93c 3159 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3160 }
3161
3162 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3163 {
a85d7ed0 3164 Elf_Internal_Rela rela;
947216bf 3165 bfd_byte *loc;
a85d7ed0
NC		 3166
3167 /* This symbols needs a copy reloc. Set it up. */
3168
0451c93c
MS		 3169 if (h->dynindx == -1
3170 || (h->root.type != bfd_link_hash_defined
3171 && h->root.type != bfd_link_hash_defweak)
3172 || htab->srelbss == NULL)
3173 abort ();
a85d7ed0
NC		 3174
3175 rela.r_offset = (h->root.u.def.value
3176 + h->root.u.def.section->output_section->vma
3177 + h->root.u.def.section->output_offset);
3178 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3179 rela.r_addend = 0;
947216bf
AM		 3180 loc = htab->srelbss->contents;
3181 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
0451c93c 3182 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3183 }
3184
3185 /* Mark some specially defined symbols as absolute. */
3186 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3187 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3188 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3189 sym->st_shndx = SHN_ABS;
3190
b34976b6 3191 return TRUE;
a85d7ed0
NC		 3192}
3193
0451c93c
MS		 3194/* Used to decide how to sort relocs in an optimal manner for the
3195 dynamic linker, before writing them out. */
3196
3197static enum elf_reloc_type_class
3198elf_s390_reloc_type_class (rela)
3199 const Elf_Internal_Rela *rela;
3200{
3201 switch ((int) ELF32_R_TYPE (rela->r_info))
3202 {
3203 case R_390_RELATIVE:
3204 return reloc_class_relative;
3205 case R_390_JMP_SLOT:
3206 return reloc_class_plt;
3207 case R_390_COPY:
3208 return reloc_class_copy;
3209 default:
3210 return reloc_class_normal;
3211 }
3212}
3213
a85d7ed0
NC		 3214/* Finish up the dynamic sections. */
3215
b34976b6 3216static bfd_boolean
a85d7ed0
NC		 3217elf_s390_finish_dynamic_sections (output_bfd, info)
3218 bfd *output_bfd;
3219 struct bfd_link_info *info;
3220{
0451c93c 3221 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 3222 bfd *dynobj;
3223 asection *sdyn;
a85d7ed0 3224
0451c93c
MS		 3225 htab = elf_s390_hash_table (info);
3226 dynobj = htab->elf.dynobj;
a85d7ed0
NC		 3227 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3228
0451c93c 3229 if (htab->elf.dynamic_sections_created)
a85d7ed0 3230 {
a85d7ed0
NC		 3231 Elf32_External_Dyn *dyncon, *dynconend;
3232
0451c93c
MS		 3233 if (sdyn == NULL || htab->sgot == NULL)
3234 abort ();
a85d7ed0
NC		 3235
3236 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3237 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3238 for (; dyncon < dynconend; dyncon++)
3239 {
3240 Elf_Internal_Dyn dyn;
a85d7ed0 3241 asection *s;
ec338859 3242
a85d7ed0 3243 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
ec338859 3244
a85d7ed0
NC		 3245 switch (dyn.d_tag)
3246 {
3247 default:
0451c93c 3248 continue;
ec338859 3249
a85d7ed0 3250 case DT_PLTGOT:
0451c93c
MS		 3251 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3252 break;
ec338859 3253
a85d7ed0 3254 case DT_JMPREL:
0451c93c 3255 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
a85d7ed0
NC		 3256 break;
3257
3258 case DT_PLTRELSZ:
0451c93c 3259 s = htab->srelplt->output_section;
a85d7ed0
NC		 3260 if (s->_cooked_size != 0)
3261 dyn.d_un.d_val = s->_cooked_size;
3262 else
3263 dyn.d_un.d_val = s->_raw_size;
a85d7ed0
NC		 3264 break;
3265 }
0451c93c
MS		 3266
3267 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
a85d7ed0
NC		 3268 }
3269
3270 /* Fill in the special first entry in the procedure linkage table. */
0451c93c 3271 if (htab->splt && htab->splt->_raw_size > 0)
a85d7ed0 3272 {
0451c93c 3273 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
a85d7ed0 3274 if (info->shared)
0451c93c 3275 {
dc810e39 3276 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
0451c93c 3277 htab->splt->contents );
dc810e39 3278 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
0451c93c 3279 htab->splt->contents +4 );
dc810e39 3280 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
0451c93c 3281 htab->splt->contents +8 );
dc810e39 3282 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
0451c93c 3283 htab->splt->contents +12 );
dc810e39 3284 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
0451c93c 3285 htab->splt->contents +16 );
a85d7ed0
NC		 3286 }
3287 else
3288 {
0451c93c
MS		 3289 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3290 htab->splt->contents );
dc810e39 3291 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
0451c93c 3292 htab->splt->contents +4 );
dc810e39 3293 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
0451c93c 3294 htab->splt->contents +8 );
dc810e39 3295 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
0451c93c 3296 htab->splt->contents +12 );
dc810e39 3297 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
0451c93c 3298 htab->splt->contents +16 );
dc810e39 3299 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
0451c93c 3300 htab->splt->contents +20 );
a85d7ed0 3301 bfd_put_32 (output_bfd,
0451c93c
MS		 3302 htab->sgotplt->output_section->vma
3303 + htab->sgotplt->output_offset,
3304 htab->splt->contents + 24);
a85d7ed0 3305 }
0451c93c
MS		 3306 elf_section_data (htab->splt->output_section)
3307 ->this_hdr.sh_entsize = 4;
a85d7ed0
NC		 3308 }
3309
3310 }
3311
0451c93c 3312 if (htab->sgotplt)
a85d7ed0 3313 {
0451c93c
MS		 3314 /* Fill in the first three entries in the global offset table. */
3315 if (htab->sgotplt->_raw_size > 0)
3316 {
3317 bfd_put_32 (output_bfd,
3318 (sdyn == NULL ? (bfd_vma) 0
3319 : sdyn->output_section->vma + sdyn->output_offset),
3320 htab->sgotplt->contents);
3321 /* One entry for shared object struct ptr. */
3322 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3323 /* One entry for _dl_runtime_resolve. */
3324 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3325 }
a85d7ed0 3326
0451c93c
MS		 3327 elf_section_data (htab->sgotplt->output_section)
3328 ->this_hdr.sh_entsize = 4;
3329 }
b34976b6 3330 return TRUE;
a85d7ed0
NC		 3331}
3332
b34976b6 3333static bfd_boolean
979f4a38
NC		 3334elf_s390_grok_prstatus (abfd, note)
3335 bfd * abfd;
3336 Elf_Internal_Note * note;
3337{
3338 int offset;
3339 unsigned int raw_size;
3340
3341 switch (note->descsz)
3342 {
3343 default:
b34976b6 3344 return FALSE;
979f4a38
NC		 3345
3346 case 224: /* S/390 Linux. */
3347 /* pr_cursig */
3348 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3349
3350 /* pr_pid */
3351 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3352
3353 /* pr_reg */
3354 offset = 72;
3355 raw_size = 144;
3356 break;
3357 }
3358
3359 /* Make a ".reg/999" section. */
3360 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3361 raw_size, note->descpos + offset);
3362}
3363
a85d7ed0
NC		 3364#define TARGET_BIG_SYM bfd_elf32_s390_vec
3365#define TARGET_BIG_NAME "elf32-s390"
3366#define ELF_ARCH bfd_arch_s390
3367#define ELF_MACHINE_CODE EM_S390
3368#define ELF_MACHINE_ALT1 EM_S390_OLD
3369#define ELF_MAXPAGESIZE 0x1000
3370
3371#define elf_backend_can_gc_sections 1
51b64d56 3372#define elf_backend_can_refcount 1
a85d7ed0
NC		 3373#define elf_backend_want_got_plt 1
3374#define elf_backend_plt_readonly 1
3375#define elf_backend_want_plt_sym 0
3376#define elf_backend_got_header_size 12
3377#define elf_backend_plt_header_size PLT_ENTRY_SIZE
b491616a 3378#define elf_backend_rela_normal 1
a85d7ed0
NC		 3379
3380#define elf_info_to_howto elf_s390_info_to_howto
3381
a85d7ed0
NC		 3382#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3383#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3384#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3385
3386#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3387#define elf_backend_check_relocs elf_s390_check_relocs
0451c93c
MS		 3388#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3389#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
a85d7ed0
NC		 3390#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3391#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3392#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3393#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
0451c93c 3394#define elf_backend_reloc_type_class elf_s390_reloc_type_class
a85d7ed0
NC		 3395#define elf_backend_relocate_section elf_s390_relocate_section
3396#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
29c2fb7c 3397#define elf_backend_reloc_type_class elf_s390_reloc_type_class
979f4a38 3398#define elf_backend_grok_prstatus elf_s390_grok_prstatus
a85d7ed0 3399
69fc87f1 3400#define bfd_elf32_mkobject elf_s390_mkobject
a85d7ed0
NC		 3401#define elf_backend_object_p elf_s390_object_p
3402
3403#include "elf32-target.h"
GDB Binutils - Deliverables
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