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* elf32-hppa.c (elf32_hppa_gc_sweep_hook): Simplify dynamic reloc
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27
28 static reloc_howto_type *elf_s390_reloc_type_lookup
29 PARAMS ((bfd *, bfd_reloc_code_real_type));
30 static void elf_s390_info_to_howto
31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
32 static bfd_boolean elf_s390_is_local_label_name
33 PARAMS ((bfd *, const char *));
34 static struct bfd_hash_entry *link_hash_newfunc
35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
37 PARAMS ((bfd *));
38 static bfd_boolean create_got_section
39 PARAMS((bfd *, struct bfd_link_info *));
40 static bfd_boolean elf_s390_create_dynamic_sections
41 PARAMS((bfd *, struct bfd_link_info *));
42 static void elf_s390_copy_indirect_symbol
43 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
44 struct elf_link_hash_entry *));
45 static bfd_boolean elf_s390_check_relocs
46 PARAMS ((bfd *, struct bfd_link_info *, asection *,
47 const Elf_Internal_Rela *));
48 static asection *elf_s390_gc_mark_hook
49 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
50 struct elf_link_hash_entry *, Elf_Internal_Sym *));
51 static bfd_boolean elf_s390_gc_sweep_hook
52 PARAMS ((bfd *, struct bfd_link_info *, asection *,
53 const Elf_Internal_Rela *));
54 struct elf_s390_link_hash_entry;
55 static void elf_s390_adjust_gotplt
56 PARAMS ((struct elf_s390_link_hash_entry *));
57 static bfd_boolean elf_s390_adjust_dynamic_symbol
58 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
59 static bfd_boolean allocate_dynrelocs
60 PARAMS ((struct elf_link_hash_entry *, PTR));
61 static bfd_boolean readonly_dynrelocs
62 PARAMS ((struct elf_link_hash_entry *, PTR));
63 static bfd_boolean elf_s390_size_dynamic_sections
64 PARAMS ((bfd *, struct bfd_link_info *));
65 static bfd_boolean elf_s390_relocate_section
66 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
67 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
68 static bfd_boolean elf_s390_finish_dynamic_symbol
69 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
70 Elf_Internal_Sym *));
71 static enum elf_reloc_type_class elf_s390_reloc_type_class
72 PARAMS ((const Elf_Internal_Rela *));
73 static bfd_boolean elf_s390_finish_dynamic_sections
74 PARAMS ((bfd *, struct bfd_link_info *));
75 static bfd_boolean elf_s390_mkobject
76 PARAMS ((bfd *));
77 static bfd_boolean elf_s390_object_p
78 PARAMS ((bfd *));
79 static int elf_s390_tls_transition
80 PARAMS ((struct bfd_link_info *, int, int));
81 static bfd_reloc_status_type s390_tls_reloc
82 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
83 static bfd_vma dtpoff_base
84 PARAMS ((struct bfd_link_info *));
85 static bfd_vma tpoff
86 PARAMS ((struct bfd_link_info *, bfd_vma));
87 static void invalid_tls_insn
88 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
89
90 #include "elf/s390.h"
91
92 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
93 from smaller values. Start with zero, widen, *then* decrement. */
94 #define MINUS_ONE (((bfd_vma)0) - 1)
95
96 /* The relocation "howto" table. */
97 static reloc_howto_type elf_howto_table[] =
98 {
99 HOWTO (R_390_NONE, /* type */
100 0, /* rightshift */
101 0, /* size (0 = byte, 1 = short, 2 = long) */
102 0, /* bitsize */
103 FALSE, /* pc_relative */
104 0, /* bitpos */
105 complain_overflow_dont, /* complain_on_overflow */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_390_NONE", /* name */
108 FALSE, /* partial_inplace */
109 0, /* src_mask */
110 0, /* dst_mask */
111 FALSE), /* pcrel_offset */
112
113 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
115 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
117 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
123 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
124 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
125 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
127 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
129 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
131 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
133 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
135 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
137 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
139 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
141 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
143 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
145 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
147 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
149 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
151 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
153 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
155 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
157 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
159 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
161 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
163 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
165 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
167 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
169 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
170 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
171 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
172 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
173 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
175 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
177 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
179 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
181 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
183 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
184 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
185 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
186 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
187 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
188 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
189 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
190 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
191 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
192 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
193 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
194 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
195 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
196 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
197 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
199 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
200 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
202 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
203 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
204 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
205 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
206 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
207 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
208 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
210 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
211 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
212 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
213 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
214 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
215 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
216 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
217 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
218 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
219 };
220
221 /* GNU extension to record C++ vtable hierarchy. */
222 static reloc_howto_type elf64_s390_vtinherit_howto =
223 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
224 static reloc_howto_type elf64_s390_vtentry_howto =
225 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
226
227 static reloc_howto_type *
228 elf_s390_reloc_type_lookup (abfd, code)
229 bfd *abfd ATTRIBUTE_UNUSED;
230 bfd_reloc_code_real_type code;
231 {
232 switch (code)
233 {
234 case BFD_RELOC_NONE:
235 return &elf_howto_table[(int) R_390_NONE];
236 case BFD_RELOC_8:
237 return &elf_howto_table[(int) R_390_8];
238 case BFD_RELOC_390_12:
239 return &elf_howto_table[(int) R_390_12];
240 case BFD_RELOC_16:
241 return &elf_howto_table[(int) R_390_16];
242 case BFD_RELOC_32:
243 return &elf_howto_table[(int) R_390_32];
244 case BFD_RELOC_CTOR:
245 return &elf_howto_table[(int) R_390_32];
246 case BFD_RELOC_32_PCREL:
247 return &elf_howto_table[(int) R_390_PC32];
248 case BFD_RELOC_390_GOT12:
249 return &elf_howto_table[(int) R_390_GOT12];
250 case BFD_RELOC_32_GOT_PCREL:
251 return &elf_howto_table[(int) R_390_GOT32];
252 case BFD_RELOC_390_PLT32:
253 return &elf_howto_table[(int) R_390_PLT32];
254 case BFD_RELOC_390_COPY:
255 return &elf_howto_table[(int) R_390_COPY];
256 case BFD_RELOC_390_GLOB_DAT:
257 return &elf_howto_table[(int) R_390_GLOB_DAT];
258 case BFD_RELOC_390_JMP_SLOT:
259 return &elf_howto_table[(int) R_390_JMP_SLOT];
260 case BFD_RELOC_390_RELATIVE:
261 return &elf_howto_table[(int) R_390_RELATIVE];
262 case BFD_RELOC_32_GOTOFF:
263 return &elf_howto_table[(int) R_390_GOTOFF32];
264 case BFD_RELOC_390_GOTPC:
265 return &elf_howto_table[(int) R_390_GOTPC];
266 case BFD_RELOC_390_GOT16:
267 return &elf_howto_table[(int) R_390_GOT16];
268 case BFD_RELOC_16_PCREL:
269 return &elf_howto_table[(int) R_390_PC16];
270 case BFD_RELOC_390_PC16DBL:
271 return &elf_howto_table[(int) R_390_PC16DBL];
272 case BFD_RELOC_390_PLT16DBL:
273 return &elf_howto_table[(int) R_390_PLT16DBL];
274 case BFD_RELOC_390_PC32DBL:
275 return &elf_howto_table[(int) R_390_PC32DBL];
276 case BFD_RELOC_390_PLT32DBL:
277 return &elf_howto_table[(int) R_390_PLT32DBL];
278 case BFD_RELOC_390_GOTPCDBL:
279 return &elf_howto_table[(int) R_390_GOTPCDBL];
280 case BFD_RELOC_64:
281 return &elf_howto_table[(int) R_390_64];
282 case BFD_RELOC_64_PCREL:
283 return &elf_howto_table[(int) R_390_PC64];
284 case BFD_RELOC_390_GOT64:
285 return &elf_howto_table[(int) R_390_GOT64];
286 case BFD_RELOC_390_PLT64:
287 return &elf_howto_table[(int) R_390_PLT64];
288 case BFD_RELOC_390_GOTENT:
289 return &elf_howto_table[(int) R_390_GOTENT];
290 case BFD_RELOC_16_GOTOFF:
291 return &elf_howto_table[(int) R_390_GOTOFF16];
292 case BFD_RELOC_390_GOTOFF64:
293 return &elf_howto_table[(int) R_390_GOTOFF64];
294 case BFD_RELOC_390_GOTPLT12:
295 return &elf_howto_table[(int) R_390_GOTPLT12];
296 case BFD_RELOC_390_GOTPLT16:
297 return &elf_howto_table[(int) R_390_GOTPLT16];
298 case BFD_RELOC_390_GOTPLT32:
299 return &elf_howto_table[(int) R_390_GOTPLT32];
300 case BFD_RELOC_390_GOTPLT64:
301 return &elf_howto_table[(int) R_390_GOTPLT64];
302 case BFD_RELOC_390_GOTPLTENT:
303 return &elf_howto_table[(int) R_390_GOTPLTENT];
304 case BFD_RELOC_390_PLTOFF16:
305 return &elf_howto_table[(int) R_390_PLTOFF16];
306 case BFD_RELOC_390_PLTOFF32:
307 return &elf_howto_table[(int) R_390_PLTOFF32];
308 case BFD_RELOC_390_PLTOFF64:
309 return &elf_howto_table[(int) R_390_PLTOFF64];
310 case BFD_RELOC_390_TLS_LOAD:
311 return &elf_howto_table[(int) R_390_TLS_LOAD];
312 case BFD_RELOC_390_TLS_GDCALL:
313 return &elf_howto_table[(int) R_390_TLS_GDCALL];
314 case BFD_RELOC_390_TLS_LDCALL:
315 return &elf_howto_table[(int) R_390_TLS_LDCALL];
316 case BFD_RELOC_390_TLS_GD64:
317 return &elf_howto_table[(int) R_390_TLS_GD64];
318 case BFD_RELOC_390_TLS_GOTIE12:
319 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
320 case BFD_RELOC_390_TLS_GOTIE64:
321 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
322 case BFD_RELOC_390_TLS_LDM64:
323 return &elf_howto_table[(int) R_390_TLS_LDM64];
324 case BFD_RELOC_390_TLS_IE64:
325 return &elf_howto_table[(int) R_390_TLS_IE64];
326 case BFD_RELOC_390_TLS_IEENT:
327 return &elf_howto_table[(int) R_390_TLS_IEENT];
328 case BFD_RELOC_390_TLS_LE64:
329 return &elf_howto_table[(int) R_390_TLS_LE64];
330 case BFD_RELOC_390_TLS_LDO64:
331 return &elf_howto_table[(int) R_390_TLS_LDO64];
332 case BFD_RELOC_390_TLS_DTPMOD:
333 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
334 case BFD_RELOC_390_TLS_DTPOFF:
335 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
336 case BFD_RELOC_390_TLS_TPOFF:
337 return &elf_howto_table[(int) R_390_TLS_TPOFF];
338 case BFD_RELOC_VTABLE_INHERIT:
339 return &elf64_s390_vtinherit_howto;
340 case BFD_RELOC_VTABLE_ENTRY:
341 return &elf64_s390_vtentry_howto;
342 default:
343 break;
344 }
345 return 0;
346 }
347
348 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
349 and elf64-s390.c has its own copy. */
350
351 static void
352 elf_s390_info_to_howto (abfd, cache_ptr, dst)
353 bfd *abfd ATTRIBUTE_UNUSED;
354 arelent *cache_ptr;
355 Elf_Internal_Rela *dst;
356 {
357 switch (ELF64_R_TYPE(dst->r_info))
358 {
359 case R_390_GNU_VTINHERIT:
360 cache_ptr->howto = &elf64_s390_vtinherit_howto;
361 break;
362
363 case R_390_GNU_VTENTRY:
364 cache_ptr->howto = &elf64_s390_vtentry_howto;
365 break;
366
367 default:
368 BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
369 cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)];
370 }
371 }
372
373 /* A relocation function which doesn't do anything. */
374 static bfd_reloc_status_type
375 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
376 output_bfd, error_message)
377 bfd *abfd ATTRIBUTE_UNUSED;
378 arelent *reloc_entry;
379 asymbol *symbol ATTRIBUTE_UNUSED;
380 PTR data ATTRIBUTE_UNUSED;
381 asection *input_section;
382 bfd *output_bfd;
383 char **error_message ATTRIBUTE_UNUSED;
384 {
385 if (output_bfd)
386 reloc_entry->address += input_section->output_offset;
387 return bfd_reloc_ok;
388 }
389
390 static bfd_boolean
391 elf_s390_is_local_label_name (abfd, name)
392 bfd *abfd;
393 const char *name;
394 {
395 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
396 return TRUE;
397
398 return _bfd_elf_is_local_label_name (abfd, name);
399 }
400
401 /* Functions for the 390 ELF linker. */
402
403 /* The name of the dynamic interpreter. This is put in the .interp
404 section. */
405
406 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
407
408 /* The size in bytes of the first entry in the procedure linkage table. */
409 #define PLT_FIRST_ENTRY_SIZE 32
410 /* The size in bytes of an entry in the procedure linkage table. */
411 #define PLT_ENTRY_SIZE 32
412
413 #define GOT_ENTRY_SIZE 8
414
415 /* The first three entries in a procedure linkage table are reserved,
416 and the initial contents are unimportant (we zero them out).
417 Subsequent entries look like this. See the SVR4 ABI 386
418 supplement to see how this works. */
419
420 /* For the s390, simple addr offset can only be 0 - 4096.
421 To use the full 16777216 TB address space, several instructions
422 are needed to load an address in a register and execute
423 a branch( or just saving the address)
424
425 Furthermore, only r 0 and 1 are free to use!!! */
426
427 /* The first 3 words in the GOT are then reserved.
428 Word 0 is the address of the dynamic table.
429 Word 1 is a pointer to a structure describing the object
430 Word 2 is used to point to the loader entry address.
431
432 The code for PLT entries looks like this:
433
434 The GOT holds the address in the PLT to be executed.
435 The loader then gets:
436 24(15) = Pointer to the structure describing the object.
437 28(15) = Offset in symbol table
438 The loader must then find the module where the function is
439 and insert the address in the GOT.
440
441 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
442 LG 1,0(1) # 6 bytes Load address from GOT in r1
443 BCR 15,1 # 2 bytes Jump to address
444 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
445 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
446 BRCL 15,-x # 6 bytes Jump to start of PLT
447 .long ? # 4 bytes offset into symbol table
448
449 Total = 32 bytes per PLT entry
450 Fixup at offset 2: relative address to GOT entry
451 Fixup at offset 22: relative branch to PLT0
452 Fixup at offset 28: 32 bit offset into symbol table
453
454 A 32 bit offset into the symbol table is enough. It allows for symbol
455 tables up to a size of 2 gigabyte. A single dynamic object (the main
456 program, any shared library) is limited to 4GB in size and I want to see
457 the program that manages to have a symbol table of more than 2 GB with a
458 total size of at max 4 GB. */
459
460 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
461 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
462 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
463 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
464 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
465 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
466 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
467 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
468
469 /* The first PLT entry pushes the offset into the symbol table
470 from R1 onto the stack at 8(15) and the loader object info
471 at 12(15), loads the loader address in R1 and jumps to it. */
472
473 /* The first entry in the PLT:
474
475 PLT0:
476 STG 1,56(15) # r1 contains the offset into the symbol table
477 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
478 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
479 LG 1,16(1) # get entry address of loader
480 BCR 15,1 # jump to loader
481
482 Fixup at offset 8: relative address to start of GOT. */
483
484 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
485 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
486 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
487 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
488 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
489 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
490 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
491 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
492
493 /* The s390 linker needs to keep track of the number of relocs that it
494 decides to copy as dynamic relocs in check_relocs for each symbol.
495 This is so that it can later discard them if they are found to be
496 unnecessary. We store the information in a field extending the
497 regular ELF linker hash table. */
498
499 struct elf_s390_dyn_relocs
500 {
501 struct elf_s390_dyn_relocs *next;
502
503 /* The input section of the reloc. */
504 asection *sec;
505
506 /* Total number of relocs copied for the input section. */
507 bfd_size_type count;
508
509 /* Number of pc-relative relocs copied for the input section. */
510 bfd_size_type pc_count;
511 };
512
513 /* s390 ELF linker hash entry. */
514
515 struct elf_s390_link_hash_entry
516 {
517 struct elf_link_hash_entry elf;
518
519 /* Track dynamic relocs copied for this symbol. */
520 struct elf_s390_dyn_relocs *dyn_relocs;
521
522 /* Number of GOTPLT references for a function. */
523 bfd_signed_vma gotplt_refcount;
524
525 #define GOT_UNKNOWN 0
526 #define GOT_NORMAL 1
527 #define GOT_TLS_GD 2
528 #define GOT_TLS_IE 3
529 #define GOT_TLS_IE_NLT 3
530 unsigned char tls_type;
531 };
532
533 #define elf_s390_hash_entry(ent) \
534 ((struct elf_s390_link_hash_entry *)(ent))
535
536 struct elf_s390_obj_tdata
537 {
538 struct elf_obj_tdata root;
539
540 /* tls_type for each local got entry. */
541 char *local_got_tls_type;
542 };
543
544 #define elf_s390_tdata(abfd) \
545 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
546
547 #define elf_s390_local_got_tls_type(abfd) \
548 (elf_s390_tdata (abfd)->local_got_tls_type)
549
550 static bfd_boolean
551 elf_s390_mkobject (abfd)
552 bfd *abfd;
553 {
554 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
555 abfd->tdata.any = bfd_zalloc (abfd, amt);
556 if (abfd->tdata.any == NULL)
557 return FALSE;
558 return TRUE;
559 }
560
561 static bfd_boolean
562 elf_s390_object_p (abfd)
563 bfd *abfd;
564 {
565 /* Allocate our special target data. */
566 struct elf_s390_obj_tdata *new_tdata;
567 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
568 new_tdata = bfd_zalloc (abfd, amt);
569 if (new_tdata == NULL)
570 return FALSE;
571 new_tdata->root = *abfd->tdata.elf_obj_data;
572 abfd->tdata.any = new_tdata;
573 /* Set the right machine number for an s390 elf32 file. */
574 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
575 }
576
577 /* s390 ELF linker hash table. */
578
579 struct elf_s390_link_hash_table
580 {
581 struct elf_link_hash_table elf;
582
583 /* Short-cuts to get to dynamic linker sections. */
584 asection *sgot;
585 asection *sgotplt;
586 asection *srelgot;
587 asection *splt;
588 asection *srelplt;
589 asection *sdynbss;
590 asection *srelbss;
591
592 union {
593 bfd_signed_vma refcount;
594 bfd_vma offset;
595 } tls_ldm_got;
596
597 /* Small local sym to section mapping cache. */
598 struct sym_sec_cache sym_sec;
599 };
600
601 /* Get the s390 ELF linker hash table from a link_info structure. */
602
603 #define elf_s390_hash_table(p) \
604 ((struct elf_s390_link_hash_table *) ((p)->hash))
605
606 /* Create an entry in an s390 ELF linker hash table. */
607
608 static struct bfd_hash_entry *
609 link_hash_newfunc (entry, table, string)
610 struct bfd_hash_entry *entry;
611 struct bfd_hash_table *table;
612 const char *string;
613 {
614 /* Allocate the structure if it has not already been allocated by a
615 subclass. */
616 if (entry == NULL)
617 {
618 entry = bfd_hash_allocate (table,
619 sizeof (struct elf_s390_link_hash_entry));
620 if (entry == NULL)
621 return entry;
622 }
623
624 /* Call the allocation method of the superclass. */
625 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
626 if (entry != NULL)
627 {
628 struct elf_s390_link_hash_entry *eh;
629
630 eh = (struct elf_s390_link_hash_entry *) entry;
631 eh->dyn_relocs = NULL;
632 eh->gotplt_refcount = 0;
633 eh->tls_type = GOT_UNKNOWN;
634 }
635
636 return entry;
637 }
638
639 /* Create an s390 ELF linker hash table. */
640
641 static struct bfd_link_hash_table *
642 elf_s390_link_hash_table_create (abfd)
643 bfd *abfd;
644 {
645 struct elf_s390_link_hash_table *ret;
646 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
647
648 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
649 if (ret == NULL)
650 return NULL;
651
652 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
653 {
654 free (ret);
655 return NULL;
656 }
657
658 ret->sgot = NULL;
659 ret->sgotplt = NULL;
660 ret->srelgot = NULL;
661 ret->splt = NULL;
662 ret->srelplt = NULL;
663 ret->sdynbss = NULL;
664 ret->srelbss = NULL;
665 ret->tls_ldm_got.refcount = 0;
666 ret->sym_sec.abfd = NULL;
667
668 return &ret->elf.root;
669 }
670
671 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
672 shortcuts to them in our hash table. */
673
674 static bfd_boolean
675 create_got_section (dynobj, info)
676 bfd *dynobj;
677 struct bfd_link_info *info;
678 {
679 struct elf_s390_link_hash_table *htab;
680
681 if (! _bfd_elf_create_got_section (dynobj, info))
682 return FALSE;
683
684 htab = elf_s390_hash_table (info);
685 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
686 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
687 if (!htab->sgot || !htab->sgotplt)
688 abort ();
689
690 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
691 if (htab->srelgot == NULL
692 || ! bfd_set_section_flags (dynobj, htab->srelgot,
693 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
694 | SEC_IN_MEMORY | SEC_LINKER_CREATED
695 | SEC_READONLY))
696 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
697 return FALSE;
698 return TRUE;
699 }
700
701 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
702 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
703 hash table. */
704
705 static bfd_boolean
706 elf_s390_create_dynamic_sections (dynobj, info)
707 bfd *dynobj;
708 struct bfd_link_info *info;
709 {
710 struct elf_s390_link_hash_table *htab;
711
712 htab = elf_s390_hash_table (info);
713 if (!htab->sgot && !create_got_section (dynobj, info))
714 return FALSE;
715
716 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
717 return FALSE;
718
719 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
720 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
721 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
722 if (!info->shared)
723 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
724
725 if (!htab->splt || !htab->srelplt || !htab->sdynbss
726 || (!info->shared && !htab->srelbss))
727 abort ();
728
729 return TRUE;
730 }
731
732 /* Copy the extra info we tack onto an elf_link_hash_entry. */
733
734 static void
735 elf_s390_copy_indirect_symbol (bed, dir, ind)
736 struct elf_backend_data *bed;
737 struct elf_link_hash_entry *dir, *ind;
738 {
739 struct elf_s390_link_hash_entry *edir, *eind;
740
741 edir = (struct elf_s390_link_hash_entry *) dir;
742 eind = (struct elf_s390_link_hash_entry *) ind;
743
744 if (eind->dyn_relocs != NULL)
745 {
746 if (edir->dyn_relocs != NULL)
747 {
748 struct elf_s390_dyn_relocs **pp;
749 struct elf_s390_dyn_relocs *p;
750
751 if (ind->root.type == bfd_link_hash_indirect)
752 abort ();
753
754 /* Add reloc counts against the weak sym to the strong sym
755 list. Merge any entries against the same section. */
756 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
757 {
758 struct elf_s390_dyn_relocs *q;
759
760 for (q = edir->dyn_relocs; q != NULL; q = q->next)
761 if (q->sec == p->sec)
762 {
763 q->pc_count += p->pc_count;
764 q->count += p->count;
765 *pp = p->next;
766 break;
767 }
768 if (q == NULL)
769 pp = &p->next;
770 }
771 *pp = edir->dyn_relocs;
772 }
773
774 edir->dyn_relocs = eind->dyn_relocs;
775 eind->dyn_relocs = NULL;
776 }
777
778 if (ind->root.type == bfd_link_hash_indirect
779 && dir->got.refcount <= 0)
780 {
781 edir->tls_type = eind->tls_type;
782 eind->tls_type = GOT_UNKNOWN;
783 }
784
785 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
786 }
787
788 static int
789 elf_s390_tls_transition (info, r_type, is_local)
790 struct bfd_link_info *info;
791 int r_type;
792 int is_local;
793 {
794 if (info->shared)
795 return r_type;
796
797 switch (r_type)
798 {
799 case R_390_TLS_GD64:
800 case R_390_TLS_IE64:
801 if (is_local)
802 return R_390_TLS_LE64;
803 return R_390_TLS_IE64;
804 case R_390_TLS_GOTIE64:
805 if (is_local)
806 return R_390_TLS_LE64;
807 return R_390_TLS_GOTIE64;
808 case R_390_TLS_LDM64:
809 return R_390_TLS_LE64;
810 }
811
812 return r_type;
813 }
814
815 /* Look through the relocs for a section during the first phase, and
816 allocate space in the global offset table or procedure linkage
817 table. */
818
819 static bfd_boolean
820 elf_s390_check_relocs (abfd, info, sec, relocs)
821 bfd *abfd;
822 struct bfd_link_info *info;
823 asection *sec;
824 const Elf_Internal_Rela *relocs;
825 {
826 struct elf_s390_link_hash_table *htab;
827 Elf_Internal_Shdr *symtab_hdr;
828 struct elf_link_hash_entry **sym_hashes;
829 const Elf_Internal_Rela *rel;
830 const Elf_Internal_Rela *rel_end;
831 asection *sreloc;
832 bfd_signed_vma *local_got_refcounts;
833 int tls_type, old_tls_type;
834
835 if (info->relocateable)
836 return TRUE;
837
838 htab = elf_s390_hash_table (info);
839 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
840 sym_hashes = elf_sym_hashes (abfd);
841 local_got_refcounts = elf_local_got_refcounts (abfd);
842
843 sreloc = NULL;
844
845 rel_end = relocs + sec->reloc_count;
846 for (rel = relocs; rel < rel_end; rel++)
847 {
848 unsigned int r_type;
849 unsigned long r_symndx;
850 struct elf_link_hash_entry *h;
851
852 r_symndx = ELF64_R_SYM (rel->r_info);
853
854 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
855 {
856 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
857 bfd_archive_filename (abfd),
858 r_symndx);
859 return FALSE;
860 }
861
862 if (r_symndx < symtab_hdr->sh_info)
863 h = NULL;
864 else
865 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
866
867 /* Create got section and local_got_refcounts array if they
868 are needed. */
869 r_type = elf_s390_tls_transition (info,
870 ELF64_R_TYPE (rel->r_info),
871 h == NULL);
872 switch (r_type)
873 {
874 case R_390_GOT12:
875 case R_390_GOT16:
876 case R_390_GOT32:
877 case R_390_GOT64:
878 case R_390_GOTENT:
879 case R_390_GOTPLT12:
880 case R_390_GOTPLT16:
881 case R_390_GOTPLT32:
882 case R_390_GOTPLT64:
883 case R_390_GOTPLTENT:
884 case R_390_TLS_GD64:
885 case R_390_TLS_GOTIE12:
886 case R_390_TLS_GOTIE64:
887 case R_390_TLS_IEENT:
888 case R_390_TLS_IE64:
889 case R_390_TLS_LDM64:
890 if (h == NULL
891 && local_got_refcounts == NULL)
892 {
893 bfd_size_type size;
894
895 size = symtab_hdr->sh_info;
896 size *= (sizeof (bfd_signed_vma) + sizeof(char));
897 local_got_refcounts = ((bfd_signed_vma *)
898 bfd_zalloc (abfd, size));
899 if (local_got_refcounts == NULL)
900 return FALSE;
901 elf_local_got_refcounts (abfd) = local_got_refcounts;
902 elf_s390_local_got_tls_type (abfd)
903 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
904 }
905 /* Fall through. */
906 case R_390_GOTOFF16:
907 case R_390_GOTOFF32:
908 case R_390_GOTOFF64:
909 case R_390_GOTPC:
910 case R_390_GOTPCDBL:
911 if (htab->sgot == NULL)
912 {
913 if (htab->elf.dynobj == NULL)
914 htab->elf.dynobj = abfd;
915 if (!create_got_section (htab->elf.dynobj, info))
916 return FALSE;
917 }
918 }
919
920 switch (r_type)
921 {
922 case R_390_GOTOFF16:
923 case R_390_GOTOFF32:
924 case R_390_GOTOFF64:
925 case R_390_GOTPC:
926 case R_390_GOTPCDBL:
927 /* Got is created, nothing to be done. */
928 break;
929
930 case R_390_PLT16DBL:
931 case R_390_PLT32:
932 case R_390_PLT32DBL:
933 case R_390_PLT64:
934 case R_390_PLTOFF16:
935 case R_390_PLTOFF32:
936 case R_390_PLTOFF64:
937 /* This symbol requires a procedure linkage table entry. We
938 actually build the entry in adjust_dynamic_symbol,
939 because this might be a case of linking PIC code which is
940 never referenced by a dynamic object, in which case we
941 don't need to generate a procedure linkage table entry
942 after all. */
943
944 /* If this is a local symbol, we resolve it directly without
945 creating a procedure linkage table entry. */
946 if (h != NULL)
947 {
948 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
949 h->plt.refcount += 1;
950 }
951 break;
952
953 case R_390_GOTPLT12:
954 case R_390_GOTPLT16:
955 case R_390_GOTPLT32:
956 case R_390_GOTPLT64:
957 case R_390_GOTPLTENT:
958 /* This symbol requires either a procedure linkage table entry
959 or an entry in the local got. We actually build the entry
960 in adjust_dynamic_symbol because whether this is really a
961 global reference can change and with it the fact if we have
962 to create a plt entry or a local got entry. To be able to
963 make a once global symbol a local one we have to keep track
964 of the number of gotplt references that exist for this
965 symbol. */
966 if (h != NULL)
967 {
968 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
969 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
970 h->plt.refcount += 1;
971 }
972 else
973 local_got_refcounts[r_symndx] += 1;
974 break;
975
976 case R_390_TLS_LDM64:
977 htab->tls_ldm_got.refcount += 1;
978 break;
979
980 case R_390_TLS_IE64:
981 case R_390_TLS_GOTIE12:
982 case R_390_TLS_GOTIE64:
983 case R_390_TLS_IEENT:
984 if (info->shared)
985 info->flags |= DF_STATIC_TLS;
986 /* Fall through */
987
988 case R_390_GOT12:
989 case R_390_GOT16:
990 case R_390_GOT32:
991 case R_390_GOT64:
992 case R_390_GOTENT:
993 case R_390_TLS_GD64:
994 /* This symbol requires a global offset table entry. */
995 switch (r_type)
996 {
997 default:
998 case R_390_GOT12:
999 case R_390_GOT16:
1000 case R_390_GOT32:
1001 case R_390_GOTENT:
1002 tls_type = GOT_NORMAL;
1003 break;
1004 case R_390_TLS_GD64:
1005 tls_type = GOT_TLS_GD;
1006 break;
1007 case R_390_TLS_IE64:
1008 case R_390_TLS_GOTIE64:
1009 tls_type = GOT_TLS_IE;
1010 break;
1011 case R_390_TLS_GOTIE12:
1012 case R_390_TLS_IEENT:
1013 tls_type = GOT_TLS_IE_NLT;
1014 break;
1015 }
1016
1017 if (h != NULL)
1018 {
1019 h->got.refcount += 1;
1020 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1021 }
1022 else
1023 {
1024 local_got_refcounts[r_symndx] += 1;
1025 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1026 }
1027 /* If a TLS symbol is accessed using IE at least once,
1028 there is no point to use dynamic model for it. */
1029 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1030 {
1031 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1032 {
1033 (*_bfd_error_handler)
1034 (_("%s: `%s' accessed both as normal and thread local symbol"),
1035 bfd_archive_filename (abfd), h->root.root.string);
1036 return FALSE;
1037 }
1038 if (old_tls_type > tls_type)
1039 tls_type = old_tls_type;
1040 }
1041
1042 if (old_tls_type != tls_type)
1043 {
1044 if (h != NULL)
1045 elf_s390_hash_entry (h)->tls_type = tls_type;
1046 else
1047 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1048 }
1049
1050 if (r_type != R_390_TLS_IE64)
1051 break;
1052 /* Fall through */
1053
1054 case R_390_TLS_LE64:
1055 if (!info->shared)
1056 break;
1057 info->flags |= DF_STATIC_TLS;
1058 /* Fall through */
1059
1060 case R_390_8:
1061 case R_390_16:
1062 case R_390_32:
1063 case R_390_64:
1064 case R_390_PC16:
1065 case R_390_PC16DBL:
1066 case R_390_PC32:
1067 case R_390_PC32DBL:
1068 case R_390_PC64:
1069 if (h != NULL && !info->shared)
1070 {
1071 /* If this reloc is in a read-only section, we might
1072 need a copy reloc. We can't check reliably at this
1073 stage whether the section is read-only, as input
1074 sections have not yet been mapped to output sections.
1075 Tentatively set the flag for now, and correct in
1076 adjust_dynamic_symbol. */
1077 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1078
1079 /* We may need a .plt entry if the function this reloc
1080 refers to is in a shared lib. */
1081 h->plt.refcount += 1;
1082 }
1083
1084 /* If we are creating a shared library, and this is a reloc
1085 against a global symbol, or a non PC relative reloc
1086 against a local symbol, then we need to copy the reloc
1087 into the shared library. However, if we are linking with
1088 -Bsymbolic, we do not need to copy a reloc against a
1089 global symbol which is defined in an object we are
1090 including in the link (i.e., DEF_REGULAR is set). At
1091 this point we have not seen all the input files, so it is
1092 possible that DEF_REGULAR is not set now but will be set
1093 later (it is never cleared). In case of a weak definition,
1094 DEF_REGULAR may be cleared later by a strong definition in
1095 a shared library. We account for that possibility below by
1096 storing information in the relocs_copied field of the hash
1097 table entry. A similar situation occurs when creating
1098 shared libraries and symbol visibility changes render the
1099 symbol local.
1100
1101 If on the other hand, we are creating an executable, we
1102 may need to keep relocations for symbols satisfied by a
1103 dynamic library if we manage to avoid copy relocs for the
1104 symbol. */
1105 if ((info->shared
1106 && (sec->flags & SEC_ALLOC) != 0
1107 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1108 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1109 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1110 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1111 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1112 || (h != NULL
1113 && (! info->symbolic
1114 || h->root.type == bfd_link_hash_defweak
1115 || (h->elf_link_hash_flags
1116 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1117 || (!info->shared
1118 && (sec->flags & SEC_ALLOC) != 0
1119 && h != NULL
1120 && (h->root.type == bfd_link_hash_defweak
1121 || (h->elf_link_hash_flags
1122 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1123 {
1124 struct elf_s390_dyn_relocs *p;
1125 struct elf_s390_dyn_relocs **head;
1126
1127 /* We must copy these reloc types into the output file.
1128 Create a reloc section in dynobj and make room for
1129 this reloc. */
1130 if (sreloc == NULL)
1131 {
1132 const char *name;
1133 bfd *dynobj;
1134
1135 name = (bfd_elf_string_from_elf_section
1136 (abfd,
1137 elf_elfheader (abfd)->e_shstrndx,
1138 elf_section_data (sec)->rel_hdr.sh_name));
1139 if (name == NULL)
1140 return FALSE;
1141
1142 if (strncmp (name, ".rela", 5) != 0
1143 || strcmp (bfd_get_section_name (abfd, sec),
1144 name + 5) != 0)
1145 {
1146 (*_bfd_error_handler)
1147 (_("%s: bad relocation section name `%s\'"),
1148 bfd_archive_filename (abfd), name);
1149 }
1150
1151 if (htab->elf.dynobj == NULL)
1152 htab->elf.dynobj = abfd;
1153
1154 dynobj = htab->elf.dynobj;
1155 sreloc = bfd_get_section_by_name (dynobj, name);
1156 if (sreloc == NULL)
1157 {
1158 flagword flags;
1159
1160 sreloc = bfd_make_section (dynobj, name);
1161 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1162 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1163 if ((sec->flags & SEC_ALLOC) != 0)
1164 flags |= SEC_ALLOC | SEC_LOAD;
1165 if (sreloc == NULL
1166 || ! bfd_set_section_flags (dynobj, sreloc, flags)
1167 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1168 return FALSE;
1169 }
1170 elf_section_data (sec)->sreloc = sreloc;
1171 }
1172
1173 /* If this is a global symbol, we count the number of
1174 relocations we need for this symbol. */
1175 if (h != NULL)
1176 {
1177 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1178 }
1179 else
1180 {
1181 /* Track dynamic relocs needed for local syms too.
1182 We really need local syms available to do this
1183 easily. Oh well. */
1184
1185 asection *s;
1186 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1187 sec, r_symndx);
1188 if (s == NULL)
1189 return FALSE;
1190
1191 head = ((struct elf_s390_dyn_relocs **)
1192 &elf_section_data (s)->local_dynrel);
1193 }
1194
1195 p = *head;
1196 if (p == NULL || p->sec != sec)
1197 {
1198 bfd_size_type amt = sizeof *p;
1199 p = ((struct elf_s390_dyn_relocs *)
1200 bfd_alloc (htab->elf.dynobj, amt));
1201 if (p == NULL)
1202 return FALSE;
1203 p->next = *head;
1204 *head = p;
1205 p->sec = sec;
1206 p->count = 0;
1207 p->pc_count = 0;
1208 }
1209
1210 p->count += 1;
1211 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1212 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1213 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1214 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1215 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1216 p->pc_count += 1;
1217 }
1218 break;
1219
1220 /* This relocation describes the C++ object vtable hierarchy.
1221 Reconstruct it for later use during GC. */
1222 case R_390_GNU_VTINHERIT:
1223 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1224 return FALSE;
1225 break;
1226
1227 /* This relocation describes which C++ vtable entries are actually
1228 used. Record for later use during GC. */
1229 case R_390_GNU_VTENTRY:
1230 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1231 return FALSE;
1232 break;
1233
1234 default:
1235 break;
1236 }
1237 }
1238
1239 return TRUE;
1240 }
1241
1242 /* Return the section that should be marked against GC for a given
1243 relocation. */
1244
1245 static asection *
1246 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1247 asection *sec;
1248 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1249 Elf_Internal_Rela *rel;
1250 struct elf_link_hash_entry *h;
1251 Elf_Internal_Sym *sym;
1252 {
1253 if (h != NULL)
1254 {
1255 switch (ELF64_R_TYPE (rel->r_info))
1256 {
1257 case R_390_GNU_VTINHERIT:
1258 case R_390_GNU_VTENTRY:
1259 break;
1260
1261 default:
1262 switch (h->root.type)
1263 {
1264 case bfd_link_hash_defined:
1265 case bfd_link_hash_defweak:
1266 return h->root.u.def.section;
1267
1268 case bfd_link_hash_common:
1269 return h->root.u.c.p->section;
1270
1271 default:
1272 break;
1273 }
1274 }
1275 }
1276 else
1277 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1278
1279 return NULL;
1280 }
1281
1282 /* Update the got entry reference counts for the section being removed. */
1283
1284 static bfd_boolean
1285 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1286 bfd *abfd;
1287 struct bfd_link_info *info;
1288 asection *sec;
1289 const Elf_Internal_Rela *relocs;
1290 {
1291 Elf_Internal_Shdr *symtab_hdr;
1292 struct elf_link_hash_entry **sym_hashes;
1293 bfd_signed_vma *local_got_refcounts;
1294 const Elf_Internal_Rela *rel, *relend;
1295
1296 elf_section_data (sec)->local_dynrel = NULL;
1297
1298 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1299 sym_hashes = elf_sym_hashes (abfd);
1300 local_got_refcounts = elf_local_got_refcounts (abfd);
1301
1302 relend = relocs + sec->reloc_count;
1303 for (rel = relocs; rel < relend; rel++)
1304 {
1305 unsigned long r_symndx;
1306 unsigned int r_type;
1307 struct elf_link_hash_entry *h = NULL;
1308
1309 r_symndx = ELF64_R_SYM (rel->r_info);
1310 if (r_symndx >= symtab_hdr->sh_info)
1311 {
1312 struct elf_s390_link_hash_entry *eh;
1313 struct elf_s390_dyn_relocs **pp;
1314 struct elf_s390_dyn_relocs *p;
1315
1316 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1317 eh = (struct elf_s390_link_hash_entry *) h;
1318
1319 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1320 if (p->sec == sec)
1321 {
1322 /* Everything must go for SEC. */
1323 *pp = p->next;
1324 break;
1325 }
1326 }
1327
1328 r_type = ELF64_R_TYPE (rel->r_info);
1329 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1330 switch (r_type)
1331 {
1332 case R_390_TLS_LDM64:
1333 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1334 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1335 break;
1336
1337 case R_390_TLS_GD64:
1338 case R_390_TLS_IE64:
1339 case R_390_TLS_GOTIE12:
1340 case R_390_TLS_GOTIE64:
1341 case R_390_TLS_IEENT:
1342 case R_390_GOT12:
1343 case R_390_GOT16:
1344 case R_390_GOT32:
1345 case R_390_GOT64:
1346 case R_390_GOTOFF16:
1347 case R_390_GOTOFF32:
1348 case R_390_GOTOFF64:
1349 case R_390_GOTPC:
1350 case R_390_GOTPCDBL:
1351 case R_390_GOTENT:
1352 if (h != NULL)
1353 {
1354 if (h->got.refcount > 0)
1355 h->got.refcount -= 1;
1356 }
1357 else if (local_got_refcounts != NULL)
1358 {
1359 if (local_got_refcounts[r_symndx] > 0)
1360 local_got_refcounts[r_symndx] -= 1;
1361 }
1362 break;
1363
1364 case R_390_8:
1365 case R_390_12:
1366 case R_390_16:
1367 case R_390_32:
1368 case R_390_64:
1369 case R_390_PC16:
1370 case R_390_PC16DBL:
1371 case R_390_PC32:
1372 case R_390_PC32DBL:
1373 case R_390_PC64:
1374 if (info->shared)
1375 break;
1376 /* Fall through */
1377
1378 case R_390_PLT16DBL:
1379 case R_390_PLT32:
1380 case R_390_PLT32DBL:
1381 case R_390_PLT64:
1382 case R_390_PLTOFF16:
1383 case R_390_PLTOFF32:
1384 case R_390_PLTOFF64:
1385 if (h != NULL)
1386 {
1387 if (h->plt.refcount > 0)
1388 h->plt.refcount -= 1;
1389 }
1390 break;
1391
1392 case R_390_GOTPLT12:
1393 case R_390_GOTPLT16:
1394 case R_390_GOTPLT32:
1395 case R_390_GOTPLT64:
1396 case R_390_GOTPLTENT:
1397 if (h != NULL)
1398 {
1399 if (h->plt.refcount > 0)
1400 {
1401 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1402 h->plt.refcount -= 1;
1403 }
1404 }
1405 else if (local_got_refcounts != NULL)
1406 {
1407 if (local_got_refcounts[r_symndx] > 0)
1408 local_got_refcounts[r_symndx] -= 1;
1409 }
1410 break;
1411
1412 default:
1413 break;
1414 }
1415 }
1416
1417 return TRUE;
1418 }
1419
1420 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1421 entry but we found we will not create any. Called when we find we will
1422 not have any PLT for this symbol, by for example
1423 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1424 or elf_s390_size_dynamic_sections if no dynamic sections will be
1425 created (we're only linking static objects). */
1426
1427 static void
1428 elf_s390_adjust_gotplt (h)
1429 struct elf_s390_link_hash_entry *h;
1430 {
1431 if (h->elf.root.type == bfd_link_hash_warning)
1432 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1433
1434 if (h->gotplt_refcount <= 0)
1435 return;
1436
1437 /* We simply add the number of gotplt references to the number
1438 * of got references for this symbol. */
1439 h->elf.got.refcount += h->gotplt_refcount;
1440 h->gotplt_refcount = -1;
1441 }
1442
1443 /* Adjust a symbol defined by a dynamic object and referenced by a
1444 regular object. The current definition is in some section of the
1445 dynamic object, but we're not including those sections. We have to
1446 change the definition to something the rest of the link can
1447 understand. */
1448
1449 static bfd_boolean
1450 elf_s390_adjust_dynamic_symbol (info, h)
1451 struct bfd_link_info *info;
1452 struct elf_link_hash_entry *h;
1453 {
1454 struct elf_s390_link_hash_table *htab;
1455 struct elf_s390_link_hash_entry * eh;
1456 struct elf_s390_dyn_relocs *p;
1457 asection *s;
1458 unsigned int power_of_two;
1459
1460 /* If this is a function, put it in the procedure linkage table. We
1461 will fill in the contents of the procedure linkage table later
1462 (although we could actually do it here). */
1463 if (h->type == STT_FUNC
1464 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1465 {
1466 if (h->plt.refcount <= 0
1467 || (! info->shared
1468 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
1469 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1470 && h->root.type != bfd_link_hash_undefweak
1471 && h->root.type != bfd_link_hash_undefined))
1472 {
1473 /* This case can occur if we saw a PLT32 reloc in an input
1474 file, but the symbol was never referred to by a dynamic
1475 object, or if all references were garbage collected. In
1476 such a case, we don't actually need to build a procedure
1477 linkage table, and we can just do a PC32 reloc instead. */
1478 h->plt.offset = (bfd_vma) -1;
1479 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1480 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1481 }
1482
1483 return TRUE;
1484 }
1485 else
1486 /* It's possible that we incorrectly decided a .plt reloc was
1487 needed for an R_390_PC32 reloc to a non-function sym in
1488 check_relocs. We can't decide accurately between function and
1489 non-function syms in check-relocs; Objects loaded later in
1490 the link may change h->type. So fix it now. */
1491 h->plt.offset = (bfd_vma) -1;
1492
1493 /* If this is a weak symbol, and there is a real definition, the
1494 processor independent code will have arranged for us to see the
1495 real definition first, and we can just use the same value. */
1496 if (h->weakdef != NULL)
1497 {
1498 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1499 || h->weakdef->root.type == bfd_link_hash_defweak);
1500 h->root.u.def.section = h->weakdef->root.u.def.section;
1501 h->root.u.def.value = h->weakdef->root.u.def.value;
1502 return TRUE;
1503 }
1504
1505 /* This is a reference to a symbol defined by a dynamic object which
1506 is not a function. */
1507
1508 /* If we are creating a shared library, we must presume that the
1509 only references to the symbol are via the global offset table.
1510 For such cases we need not do anything here; the relocations will
1511 be handled correctly by relocate_section. */
1512 if (info->shared)
1513 return TRUE;
1514
1515 /* If there are no references to this symbol that do not use the
1516 GOT, we don't need to generate a copy reloc. */
1517 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1518 return TRUE;
1519
1520 /* If -z nocopyreloc was given, we won't generate them either. */
1521 if (info->nocopyreloc)
1522 {
1523 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1524 return TRUE;
1525 }
1526
1527 eh = (struct elf_s390_link_hash_entry *) h;
1528 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1529 {
1530 s = p->sec->output_section;
1531 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1532 break;
1533 }
1534
1535 /* If we didn't find any dynamic relocs in read-only sections, then
1536 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1537 if (p == NULL)
1538 {
1539 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1540 return TRUE;
1541 }
1542
1543 /* We must allocate the symbol in our .dynbss section, which will
1544 become part of the .bss section of the executable. There will be
1545 an entry for this symbol in the .dynsym section. The dynamic
1546 object will contain position independent code, so all references
1547 from the dynamic object to this symbol will go through the global
1548 offset table. The dynamic linker will use the .dynsym entry to
1549 determine the address it must put in the global offset table, so
1550 both the dynamic object and the regular object will refer to the
1551 same memory location for the variable. */
1552
1553 htab = elf_s390_hash_table (info);
1554
1555 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1556 copy the initial value out of the dynamic object and into the
1557 runtime process image. */
1558 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1559 {
1560 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
1561 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1562 }
1563
1564 /* We need to figure out the alignment required for this symbol. I
1565 have no idea how ELF linkers handle this. */
1566 power_of_two = bfd_log2 (h->size);
1567 if (power_of_two > 3)
1568 power_of_two = 3;
1569
1570 /* Apply the required alignment. */
1571 s = htab->sdynbss;
1572 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1573 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1574 {
1575 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1576 return FALSE;
1577 }
1578
1579 /* Define the symbol as being at this point in the section. */
1580 h->root.u.def.section = s;
1581 h->root.u.def.value = s->_raw_size;
1582
1583 /* Increment the section size to make room for the symbol. */
1584 s->_raw_size += h->size;
1585
1586 return TRUE;
1587 }
1588
1589 /* This is the condition under which elf_s390_finish_dynamic_symbol
1590 will be called from elflink.h. If elflink.h doesn't call our
1591 finish_dynamic_symbol routine, we'll need to do something about
1592 initializing any .plt and .got entries in elf_s390_relocate_section. */
1593 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1594 ((DYN) \
1595 && ((INFO)->shared \
1596 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1597 && ((H)->dynindx != -1 \
1598 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1599
1600 /* Allocate space in .plt, .got and associated reloc sections for
1601 dynamic relocs. */
1602
1603 static bfd_boolean
1604 allocate_dynrelocs (h, inf)
1605 struct elf_link_hash_entry *h;
1606 PTR inf;
1607 {
1608 struct bfd_link_info *info;
1609 struct elf_s390_link_hash_table *htab;
1610 struct elf_s390_link_hash_entry *eh;
1611 struct elf_s390_dyn_relocs *p;
1612
1613 if (h->root.type == bfd_link_hash_indirect)
1614 return TRUE;
1615
1616 if (h->root.type == bfd_link_hash_warning)
1617 /* When warning symbols are created, they **replace** the "real"
1618 entry in the hash table, thus we never get to see the real
1619 symbol in a hash traversal. So look at it now. */
1620 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1621
1622 info = (struct bfd_link_info *) inf;
1623 htab = elf_s390_hash_table (info);
1624
1625 if (htab->elf.dynamic_sections_created
1626 && h->plt.refcount > 0)
1627 {
1628 /* Make sure this symbol is output as a dynamic symbol.
1629 Undefined weak syms won't yet be marked as dynamic. */
1630 if (h->dynindx == -1
1631 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1632 {
1633 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1634 return FALSE;
1635 }
1636
1637 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
1638 {
1639 asection *s = htab->splt;
1640
1641 /* If this is the first .plt entry, make room for the special
1642 first entry. */
1643 if (s->_raw_size == 0)
1644 s->_raw_size += PLT_FIRST_ENTRY_SIZE;
1645
1646 h->plt.offset = s->_raw_size;
1647
1648 /* If this symbol is not defined in a regular file, and we are
1649 not generating a shared library, then set the symbol to this
1650 location in the .plt. This is required to make function
1651 pointers compare as equal between the normal executable and
1652 the shared library. */
1653 if (! info->shared
1654 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1655 {
1656 h->root.u.def.section = s;
1657 h->root.u.def.value = h->plt.offset;
1658 }
1659
1660 /* Make room for this entry. */
1661 s->_raw_size += PLT_ENTRY_SIZE;
1662
1663 /* We also need to make an entry in the .got.plt section, which
1664 will be placed in the .got section by the linker script. */
1665 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1666
1667 /* We also need to make an entry in the .rela.plt section. */
1668 htab->srelplt->_raw_size += sizeof (Elf64_External_Rela);
1669 }
1670 else
1671 {
1672 h->plt.offset = (bfd_vma) -1;
1673 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1674 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1675 }
1676 }
1677 else
1678 {
1679 h->plt.offset = (bfd_vma) -1;
1680 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1681 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1682 }
1683
1684 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1685 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1686 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1687 we can save the dynamic TLS relocation. */
1688 if (h->got.refcount > 0
1689 && !info->shared
1690 && h->dynindx == -1
1691 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1692 {
1693 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1694 /* For the GOTIE access without a literal pool entry the offset has
1695 to be stored somewhere. The immediate value in the instruction
1696 is not bit enough so the value is stored in the got. */
1697 {
1698 h->got.offset = htab->sgot->_raw_size;
1699 htab->sgot->_raw_size += GOT_ENTRY_SIZE;
1700 }
1701 else
1702 h->got.offset = (bfd_vma) -1;
1703 }
1704 else if (h->got.refcount > 0)
1705 {
1706 asection *s;
1707 bfd_boolean dyn;
1708 int tls_type = elf_s390_hash_entry(h)->tls_type;
1709
1710 /* Make sure this symbol is output as a dynamic symbol.
1711 Undefined weak syms won't yet be marked as dynamic. */
1712 if (h->dynindx == -1
1713 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1714 {
1715 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1716 return FALSE;
1717 }
1718
1719 s = htab->sgot;
1720 h->got.offset = s->_raw_size;
1721 s->_raw_size += GOT_ENTRY_SIZE;
1722 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1723 if (tls_type == GOT_TLS_GD)
1724 s->_raw_size += GOT_ENTRY_SIZE;
1725 dyn = htab->elf.dynamic_sections_created;
1726 /* R_390_TLS_IE64 needs one dynamic relocation,
1727 R_390_TLS_GD64 needs one if local symbol and two if global. */
1728 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1729 || tls_type >= GOT_TLS_IE)
1730 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1731 else if (tls_type == GOT_TLS_GD)
1732 htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela);
1733 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
1734 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1735 }
1736 else
1737 h->got.offset = (bfd_vma) -1;
1738
1739 eh = (struct elf_s390_link_hash_entry *) h;
1740 if (eh->dyn_relocs == NULL)
1741 return TRUE;
1742
1743 /* In the shared -Bsymbolic case, discard space allocated for
1744 dynamic pc-relative relocs against symbols which turn out to be
1745 defined in regular objects. For the normal shared case, discard
1746 space for pc-relative relocs that have become local due to symbol
1747 visibility changes. */
1748
1749 if (info->shared)
1750 {
1751 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1752 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1753 || info->symbolic))
1754 {
1755 struct elf_s390_dyn_relocs **pp;
1756
1757 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1758 {
1759 p->count -= p->pc_count;
1760 p->pc_count = 0;
1761 if (p->count == 0)
1762 *pp = p->next;
1763 else
1764 pp = &p->next;
1765 }
1766 }
1767 }
1768 else
1769 {
1770 /* For the non-shared case, discard space for relocs against
1771 symbols which turn out to need copy relocs or are not
1772 dynamic. */
1773
1774 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1775 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1776 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1777 || (htab->elf.dynamic_sections_created
1778 && (h->root.type == bfd_link_hash_undefweak
1779 || h->root.type == bfd_link_hash_undefined))))
1780 {
1781 /* Make sure this symbol is output as a dynamic symbol.
1782 Undefined weak syms won't yet be marked as dynamic. */
1783 if (h->dynindx == -1
1784 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1785 {
1786 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1787 return FALSE;
1788 }
1789
1790 /* If that succeeded, we know we'll be keeping all the
1791 relocs. */
1792 if (h->dynindx != -1)
1793 goto keep;
1794 }
1795
1796 eh->dyn_relocs = NULL;
1797
1798 keep: ;
1799 }
1800
1801 /* Finally, allocate space. */
1802 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1803 {
1804 asection *sreloc = elf_section_data (p->sec)->sreloc;
1805 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
1806 }
1807
1808 return TRUE;
1809 }
1810
1811 /* Find any dynamic relocs that apply to read-only sections. */
1812
1813 static bfd_boolean
1814 readonly_dynrelocs (h, inf)
1815 struct elf_link_hash_entry *h;
1816 PTR inf;
1817 {
1818 struct elf_s390_link_hash_entry *eh;
1819 struct elf_s390_dyn_relocs *p;
1820
1821 if (h->root.type == bfd_link_hash_warning)
1822 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1823
1824 eh = (struct elf_s390_link_hash_entry *) h;
1825 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1826 {
1827 asection *s = p->sec->output_section;
1828
1829 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1830 {
1831 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1832
1833 info->flags |= DF_TEXTREL;
1834
1835 /* Not an error, just cut short the traversal. */
1836 return FALSE;
1837 }
1838 }
1839 return TRUE;
1840 }
1841
1842 /* Set the sizes of the dynamic sections. */
1843
1844 static bfd_boolean
1845 elf_s390_size_dynamic_sections (output_bfd, info)
1846 bfd *output_bfd ATTRIBUTE_UNUSED;
1847 struct bfd_link_info *info;
1848 {
1849 struct elf_s390_link_hash_table *htab;
1850 bfd *dynobj;
1851 asection *s;
1852 bfd_boolean relocs;
1853 bfd *ibfd;
1854
1855 htab = elf_s390_hash_table (info);
1856 dynobj = htab->elf.dynobj;
1857 if (dynobj == NULL)
1858 abort ();
1859
1860 if (htab->elf.dynamic_sections_created)
1861 {
1862 /* Set the contents of the .interp section to the interpreter. */
1863 if (! info->shared)
1864 {
1865 s = bfd_get_section_by_name (dynobj, ".interp");
1866 if (s == NULL)
1867 abort ();
1868 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1869 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1870 }
1871 }
1872
1873 /* Set up .got offsets for local syms, and space for local dynamic
1874 relocs. */
1875 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1876 {
1877 bfd_signed_vma *local_got;
1878 bfd_signed_vma *end_local_got;
1879 char *local_tls_type;
1880 bfd_size_type locsymcount;
1881 Elf_Internal_Shdr *symtab_hdr;
1882 asection *srela;
1883
1884 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1885 continue;
1886
1887 for (s = ibfd->sections; s != NULL; s = s->next)
1888 {
1889 struct elf_s390_dyn_relocs *p;
1890
1891 for (p = *((struct elf_s390_dyn_relocs **)
1892 &elf_section_data (s)->local_dynrel);
1893 p != NULL;
1894 p = p->next)
1895 {
1896 if (!bfd_is_abs_section (p->sec)
1897 && bfd_is_abs_section (p->sec->output_section))
1898 {
1899 /* Input section has been discarded, either because
1900 it is a copy of a linkonce section or due to
1901 linker script /DISCARD/, so we'll be discarding
1902 the relocs too. */
1903 }
1904 else if (p->count != 0)
1905 {
1906 srela = elf_section_data (p->sec)->sreloc;
1907 srela->_raw_size += p->count * sizeof (Elf64_External_Rela);
1908 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1909 info->flags |= DF_TEXTREL;
1910 }
1911 }
1912 }
1913
1914 local_got = elf_local_got_refcounts (ibfd);
1915 if (!local_got)
1916 continue;
1917
1918 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1919 locsymcount = symtab_hdr->sh_info;
1920 end_local_got = local_got + locsymcount;
1921 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1922 s = htab->sgot;
1923 srela = htab->srelgot;
1924 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1925 {
1926 if (*local_got > 0)
1927 {
1928 *local_got = s->_raw_size;
1929 s->_raw_size += GOT_ENTRY_SIZE;
1930 if (*local_tls_type == GOT_TLS_GD)
1931 s->_raw_size += GOT_ENTRY_SIZE;
1932 if (info->shared)
1933 srela->_raw_size += sizeof (Elf64_External_Rela);
1934 }
1935 else
1936 *local_got = (bfd_vma) -1;
1937 }
1938 }
1939
1940 if (htab->tls_ldm_got.refcount > 0)
1941 {
1942 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1943 relocs. */
1944 htab->tls_ldm_got.offset = htab->sgot->_raw_size;
1945 htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
1946 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1947 }
1948 else
1949 htab->tls_ldm_got.offset = -1;
1950
1951 /* Allocate global sym .plt and .got entries, and space for global
1952 sym dynamic relocs. */
1953 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1954
1955 /* We now have determined the sizes of the various dynamic sections.
1956 Allocate memory for them. */
1957 relocs = FALSE;
1958 for (s = dynobj->sections; s != NULL; s = s->next)
1959 {
1960 if ((s->flags & SEC_LINKER_CREATED) == 0)
1961 continue;
1962
1963 if (s == htab->splt
1964 || s == htab->sgot
1965 || s == htab->sgotplt)
1966 {
1967 /* Strip this section if we don't need it; see the
1968 comment below. */
1969 }
1970 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
1971 {
1972 if (s->_raw_size != 0 && s != htab->srelplt)
1973 relocs = TRUE;
1974
1975 /* We use the reloc_count field as a counter if we need
1976 to copy relocs into the output file. */
1977 s->reloc_count = 0;
1978 }
1979 else
1980 {
1981 /* It's not one of our sections, so don't allocate space. */
1982 continue;
1983 }
1984
1985 if (s->_raw_size == 0)
1986 {
1987 /* If we don't need this section, strip it from the
1988 output file. This is to handle .rela.bss and
1989 .rela.plt. We must create it in
1990 create_dynamic_sections, because it must be created
1991 before the linker maps input sections to output
1992 sections. The linker does that before
1993 adjust_dynamic_symbol is called, and it is that
1994 function which decides whether anything needs to go
1995 into these sections. */
1996
1997 _bfd_strip_section_from_output (info, s);
1998 continue;
1999 }
2000
2001 /* Allocate memory for the section contents. We use bfd_zalloc
2002 here in case unused entries are not reclaimed before the
2003 section's contents are written out. This should not happen,
2004 but this way if it does, we get a R_390_NONE reloc instead
2005 of garbage. */
2006 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2007 if (s->contents == NULL)
2008 return FALSE;
2009 }
2010
2011 if (htab->elf.dynamic_sections_created)
2012 {
2013 /* Add some entries to the .dynamic section. We fill in the
2014 values later, in elf_s390_finish_dynamic_sections, but we
2015 must add the entries now so that we get the correct size for
2016 the .dynamic section. The DT_DEBUG entry is filled in by the
2017 dynamic linker and used by the debugger. */
2018 #define add_dynamic_entry(TAG, VAL) \
2019 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
2020
2021 if (! info->shared)
2022 {
2023 if (!add_dynamic_entry (DT_DEBUG, 0))
2024 return FALSE;
2025 }
2026
2027 if (htab->splt->_raw_size != 0)
2028 {
2029 if (!add_dynamic_entry (DT_PLTGOT, 0)
2030 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2031 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2032 || !add_dynamic_entry (DT_JMPREL, 0))
2033 return FALSE;
2034 }
2035
2036 if (relocs)
2037 {
2038 if (!add_dynamic_entry (DT_RELA, 0)
2039 || !add_dynamic_entry (DT_RELASZ, 0)
2040 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2041 return FALSE;
2042
2043 /* If any dynamic relocs apply to a read-only section,
2044 then we need a DT_TEXTREL entry. */
2045 if ((info->flags & DF_TEXTREL) == 0)
2046 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2047 (PTR) info);
2048
2049 if ((info->flags & DF_TEXTREL) != 0)
2050 {
2051 if (!add_dynamic_entry (DT_TEXTREL, 0))
2052 return FALSE;
2053 }
2054 }
2055 }
2056 #undef add_dynamic_entry
2057
2058 return TRUE;
2059 }
2060
2061 /* Return the base VMA address which should be subtracted from real addresses
2062 when resolving @dtpoff relocation.
2063 This is PT_TLS segment p_vaddr. */
2064
2065 static bfd_vma
2066 dtpoff_base (info)
2067 struct bfd_link_info *info;
2068 {
2069 /* If tls_segment is NULL, we should have signalled an error already. */
2070 if (elf_hash_table (info)->tls_segment == NULL)
2071 return 0;
2072 return elf_hash_table (info)->tls_segment->start;
2073 }
2074
2075 /* Return the relocation value for @tpoff relocation
2076 if STT_TLS virtual address is ADDRESS. */
2077
2078 static bfd_vma
2079 tpoff (info, address)
2080 struct bfd_link_info *info;
2081 bfd_vma address;
2082 {
2083 struct elf_link_tls_segment *tls_segment
2084 = elf_hash_table (info)->tls_segment;
2085
2086 /* If tls_segment is NULL, we should have signalled an error already. */
2087 if (tls_segment == NULL)
2088 return 0;
2089 return (align_power (tls_segment->size, tls_segment->align)
2090 + tls_segment->start - address);
2091 }
2092
2093 /* Complain if TLS instruction relocation is against an invalid
2094 instruction. */
2095
2096 static void
2097 invalid_tls_insn (input_bfd, input_section, rel)
2098 bfd *input_bfd;
2099 asection *input_section;
2100 Elf_Internal_Rela *rel;
2101 {
2102 reloc_howto_type *howto;
2103
2104 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2105 (*_bfd_error_handler)
2106 (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"),
2107 bfd_archive_filename (input_bfd),
2108 bfd_get_section_name (input_bfd, input_section),
2109 (long) rel->r_offset,
2110 howto->name);
2111 }
2112
2113 /* Relocate a 390 ELF section. */
2114
2115 static bfd_boolean
2116 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2117 contents, relocs, local_syms, local_sections)
2118 bfd *output_bfd;
2119 struct bfd_link_info *info;
2120 bfd *input_bfd;
2121 asection *input_section;
2122 bfd_byte *contents;
2123 Elf_Internal_Rela *relocs;
2124 Elf_Internal_Sym *local_syms;
2125 asection **local_sections;
2126 {
2127 struct elf_s390_link_hash_table *htab;
2128 Elf_Internal_Shdr *symtab_hdr;
2129 struct elf_link_hash_entry **sym_hashes;
2130 bfd_vma *local_got_offsets;
2131 Elf_Internal_Rela *rel;
2132 Elf_Internal_Rela *relend;
2133
2134 if (info->relocateable)
2135 return TRUE;
2136
2137 htab = elf_s390_hash_table (info);
2138 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2139 sym_hashes = elf_sym_hashes (input_bfd);
2140 local_got_offsets = elf_local_got_offsets (input_bfd);
2141
2142 rel = relocs;
2143 relend = relocs + input_section->reloc_count;
2144 for (; rel < relend; rel++)
2145 {
2146 unsigned int r_type;
2147 reloc_howto_type *howto;
2148 unsigned long r_symndx;
2149 struct elf_link_hash_entry *h;
2150 Elf_Internal_Sym *sym;
2151 asection *sec;
2152 bfd_vma off;
2153 bfd_vma relocation;
2154 bfd_boolean unresolved_reloc;
2155 bfd_reloc_status_type r;
2156 int tls_type;
2157
2158 r_type = ELF64_R_TYPE (rel->r_info);
2159 if (r_type == (int) R_390_GNU_VTINHERIT
2160 || r_type == (int) R_390_GNU_VTENTRY)
2161 continue;
2162 if (r_type >= (int) R_390_max)
2163 {
2164 bfd_set_error (bfd_error_bad_value);
2165 return FALSE;
2166 }
2167
2168 howto = elf_howto_table + r_type;
2169 r_symndx = ELF64_R_SYM (rel->r_info);
2170
2171 /* This is a final link. */
2172 h = NULL;
2173 sym = NULL;
2174 sec = NULL;
2175 unresolved_reloc = FALSE;
2176 if (r_symndx < symtab_hdr->sh_info)
2177 {
2178 sym = local_syms + r_symndx;
2179 sec = local_sections[r_symndx];
2180 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
2181 }
2182 else
2183 {
2184 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2185 while (h->root.type == bfd_link_hash_indirect
2186 || h->root.type == bfd_link_hash_warning)
2187 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2188
2189 if (h->root.type == bfd_link_hash_defined
2190 || h->root.type == bfd_link_hash_defweak)
2191 {
2192 sec = h->root.u.def.section;
2193 if (sec->output_section == NULL)
2194 {
2195 /* Set a flag that will be cleared later if we find a
2196 relocation value for this symbol. output_section
2197 is typically NULL for symbols satisfied by a shared
2198 library. */
2199 unresolved_reloc = TRUE;
2200 relocation = 0;
2201 }
2202 else
2203 relocation = (h->root.u.def.value
2204 + sec->output_section->vma
2205 + sec->output_offset);
2206 }
2207 else if (h->root.type == bfd_link_hash_undefweak)
2208 relocation = 0;
2209 else if (info->shared
2210 && !info->no_undefined
2211 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2212 relocation = 0;
2213 else
2214 {
2215 if (! ((*info->callbacks->undefined_symbol)
2216 (info, h->root.root.string, input_bfd,
2217 input_section, rel->r_offset,
2218 (!info->shared || info->no_undefined
2219 || ELF_ST_VISIBILITY (h->other)))))
2220 return FALSE;
2221 relocation = 0;
2222 }
2223 }
2224
2225 switch (r_type)
2226 {
2227 case R_390_GOTPLT12:
2228 case R_390_GOTPLT16:
2229 case R_390_GOTPLT32:
2230 case R_390_GOTPLT64:
2231 case R_390_GOTPLTENT:
2232 /* There are three cases for a GOTPLT relocation. 1) The
2233 relocation is against the jump slot entry of a plt that
2234 will get emitted to the output file. 2) The relocation
2235 is against the jump slot of a plt entry that has been
2236 removed. elf_s390_adjust_gotplt has created a GOT entry
2237 as replacement. 3) The relocation is against a local symbol.
2238 Cases 2) and 3) are the same as the GOT relocation code
2239 so we just have to test for case 1 and fall through for
2240 the other two. */
2241 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2242 {
2243 bfd_vma plt_index;
2244
2245 /* Calc. index no.
2246 Current offset - size first entry / entry size. */
2247 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2248 PLT_ENTRY_SIZE;
2249
2250 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2251 addr & GOT addr. */
2252 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2253 unresolved_reloc = FALSE;
2254
2255 if (r_type == R_390_GOTPLTENT)
2256 relocation += htab->sgot->output_section->vma;
2257 break;
2258 }
2259 /* Fall through. */
2260
2261 case R_390_GOT12:
2262 case R_390_GOT16:
2263 case R_390_GOT32:
2264 case R_390_GOT64:
2265 case R_390_GOTENT:
2266 /* Relocation is to the entry for this symbol in the global
2267 offset table. */
2268 if (htab->sgot == NULL)
2269 abort ();
2270
2271 if (h != NULL)
2272 {
2273 bfd_boolean dyn;
2274
2275 off = h->got.offset;
2276 dyn = htab->elf.dynamic_sections_created;
2277 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
2278 || (info->shared
2279 && (info->symbolic
2280 || h->dynindx == -1
2281 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2282 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2283 {
2284 /* This is actually a static link, or it is a
2285 -Bsymbolic link and the symbol is defined
2286 locally, or the symbol was forced to be local
2287 because of a version file. We must initialize
2288 this entry in the global offset table. Since the
2289 offset must always be a multiple of 2, we use the
2290 least significant bit to record whether we have
2291 initialized it already.
2292
2293 When doing a dynamic link, we create a .rel.got
2294 relocation entry to initialize the value. This
2295 is done in the finish_dynamic_symbol routine. */
2296 if ((off & 1) != 0)
2297 off &= ~1;
2298 else
2299 {
2300 bfd_put_64 (output_bfd, relocation,
2301 htab->sgot->contents + off);
2302 h->got.offset |= 1;
2303 }
2304 }
2305 else
2306 unresolved_reloc = FALSE;
2307 }
2308 else
2309 {
2310 if (local_got_offsets == NULL)
2311 abort ();
2312
2313 off = local_got_offsets[r_symndx];
2314
2315 /* The offset must always be a multiple of 8. We use
2316 the least significant bit to record whether we have
2317 already generated the necessary reloc. */
2318 if ((off & 1) != 0)
2319 off &= ~1;
2320 else
2321 {
2322 bfd_put_64 (output_bfd, relocation,
2323 htab->sgot->contents + off);
2324
2325 if (info->shared)
2326 {
2327 asection *s;
2328 Elf_Internal_Rela outrel;
2329 bfd_byte *loc;
2330
2331 s = htab->srelgot;
2332 if (s == NULL)
2333 abort ();
2334
2335 outrel.r_offset = (htab->sgot->output_section->vma
2336 + htab->sgot->output_offset
2337 + off);
2338 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2339 outrel.r_addend = relocation;
2340 loc = s->contents;
2341 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2342 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2343 }
2344
2345 local_got_offsets[r_symndx] |= 1;
2346 }
2347 }
2348
2349 if (off >= (bfd_vma) -2)
2350 abort ();
2351
2352 relocation = htab->sgot->output_offset + off;
2353
2354 /* For @GOTENT the relocation is against the offset between
2355 the instruction and the symbols entry in the GOT and not
2356 between the start of the GOT and the symbols entry. We
2357 add the vma of the GOT to get the correct value. */
2358 if ( r_type == R_390_GOTENT
2359 || r_type == R_390_GOTPLTENT)
2360 relocation += htab->sgot->output_section->vma;
2361
2362 break;
2363
2364 case R_390_GOTOFF16:
2365 case R_390_GOTOFF32:
2366 case R_390_GOTOFF64:
2367 /* Relocation is relative to the start of the global offset
2368 table. */
2369
2370 /* Note that sgot->output_offset is not involved in this
2371 calculation. We always want the start of .got. If we
2372 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2373 permitted by the ABI, we might have to change this
2374 calculation. */
2375 relocation -= htab->sgot->output_section->vma;
2376 break;
2377
2378 case R_390_GOTPC:
2379 case R_390_GOTPCDBL:
2380 /* Use global offset table as symbol value. */
2381 relocation = htab->sgot->output_section->vma;
2382 unresolved_reloc = FALSE;
2383 break;
2384
2385 case R_390_PLT16DBL:
2386 case R_390_PLT32:
2387 case R_390_PLT32DBL:
2388 case R_390_PLT64:
2389 /* Relocation is to the entry for this symbol in the
2390 procedure linkage table. */
2391
2392 /* Resolve a PLT32 reloc against a local symbol directly,
2393 without using the procedure linkage table. */
2394 if (h == NULL)
2395 break;
2396
2397 if (h->plt.offset == (bfd_vma) -1
2398 || htab->splt == NULL)
2399 {
2400 /* We didn't make a PLT entry for this symbol. This
2401 happens when statically linking PIC code, or when
2402 using -Bsymbolic. */
2403 break;
2404 }
2405
2406 relocation = (htab->splt->output_section->vma
2407 + htab->splt->output_offset
2408 + h->plt.offset);
2409 unresolved_reloc = FALSE;
2410 break;
2411
2412 case R_390_PLTOFF16:
2413 case R_390_PLTOFF32:
2414 case R_390_PLTOFF64:
2415 /* Relocation is to the entry for this symbol in the
2416 procedure linkage table relative to the start of the GOT. */
2417
2418 /* For local symbols or if we didn't make a PLT entry for
2419 this symbol resolve the symbol directly. */
2420 if ( h == NULL
2421 || h->plt.offset == (bfd_vma) -1
2422 || htab->splt == NULL)
2423 {
2424 relocation -= htab->sgot->output_section->vma;
2425 break;
2426 }
2427
2428 relocation = (htab->splt->output_section->vma
2429 + htab->splt->output_offset
2430 + h->plt.offset
2431 - htab->sgot->output_section->vma);
2432 unresolved_reloc = FALSE;
2433 break;
2434
2435 case R_390_8:
2436 case R_390_16:
2437 case R_390_32:
2438 case R_390_64:
2439 case R_390_PC16:
2440 case R_390_PC16DBL:
2441 case R_390_PC32:
2442 case R_390_PC32DBL:
2443 case R_390_PC64:
2444 /* r_symndx will be zero only for relocs against symbols
2445 from removed linkonce sections, or sections discarded by
2446 a linker script. */
2447 if (r_symndx == 0
2448 || (input_section->flags & SEC_ALLOC) == 0)
2449 break;
2450
2451 if ((info->shared
2452 && ((r_type != R_390_PC16
2453 && r_type != R_390_PC16DBL
2454 && r_type != R_390_PC32
2455 && r_type != R_390_PC32DBL
2456 && r_type != R_390_PC64)
2457 || (h != NULL
2458 && h->dynindx != -1
2459 && (! info->symbolic
2460 || (h->elf_link_hash_flags
2461 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2462 || (!info->shared
2463 && h != NULL
2464 && h->dynindx != -1
2465 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2466 && (((h->elf_link_hash_flags
2467 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2468 && (h->elf_link_hash_flags
2469 & ELF_LINK_HASH_DEF_REGULAR) == 0)
2470 || h->root.type == bfd_link_hash_undefweak
2471 || h->root.type == bfd_link_hash_undefined)))
2472 {
2473 Elf_Internal_Rela outrel;
2474 bfd_boolean skip, relocate;
2475 asection *sreloc;
2476 bfd_byte *loc;
2477
2478 /* When generating a shared object, these relocations
2479 are copied into the output file to be resolved at run
2480 time. */
2481 skip = FALSE;
2482 relocate = FALSE;
2483
2484 outrel.r_offset =
2485 _bfd_elf_section_offset (output_bfd, info, input_section,
2486 rel->r_offset);
2487 if (outrel.r_offset == (bfd_vma) -1)
2488 skip = TRUE;
2489 else if (outrel.r_offset == (bfd_vma) -2)
2490 skip = TRUE, relocate = TRUE;
2491
2492 outrel.r_offset += (input_section->output_section->vma
2493 + input_section->output_offset);
2494
2495 if (skip)
2496 memset (&outrel, 0, sizeof outrel);
2497 else if (h != NULL
2498 && h->dynindx != -1
2499 && (r_type == R_390_PC16
2500 || r_type == R_390_PC16DBL
2501 || r_type == R_390_PC32
2502 || r_type == R_390_PC32DBL
2503 || r_type == R_390_PC64
2504 || !info->shared
2505 || !info->symbolic
2506 || (h->elf_link_hash_flags
2507 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2508 {
2509 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2510 outrel.r_addend = rel->r_addend;
2511 }
2512 else
2513 {
2514 /* This symbol is local, or marked to become local. */
2515 relocate = TRUE;
2516 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2517 outrel.r_addend = relocation + rel->r_addend;
2518 }
2519
2520 sreloc = elf_section_data (input_section)->sreloc;
2521 if (sreloc == NULL)
2522 abort ();
2523
2524 loc = sreloc->contents;
2525 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2526 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2527
2528 /* If this reloc is against an external symbol, we do
2529 not want to fiddle with the addend. Otherwise, we
2530 need to include the symbol value so that it becomes
2531 an addend for the dynamic reloc. */
2532 if (! relocate)
2533 continue;
2534 }
2535
2536 break;
2537
2538 /* Relocations for tls literal pool entries. */
2539 case R_390_TLS_IE64:
2540 if (info->shared)
2541 {
2542 Elf_Internal_Rela outrel;
2543 asection *sreloc;
2544 bfd_byte *loc;
2545
2546 outrel.r_offset = rel->r_offset
2547 + input_section->output_section->vma
2548 + input_section->output_offset;
2549 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2550 sreloc = elf_section_data (input_section)->sreloc;
2551 if (sreloc == NULL)
2552 abort ();
2553 loc = sreloc->contents;
2554 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2555 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2556 }
2557 /* Fall through. */
2558
2559 case R_390_TLS_GD64:
2560 case R_390_TLS_GOTIE64:
2561 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2562 tls_type = GOT_UNKNOWN;
2563 if (h == NULL && local_got_offsets)
2564 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2565 else if (h != NULL)
2566 {
2567 tls_type = elf_s390_hash_entry(h)->tls_type;
2568 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2569 r_type = R_390_TLS_LE64;
2570 }
2571 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2572 r_type = R_390_TLS_IE64;
2573
2574 if (r_type == R_390_TLS_LE64)
2575 {
2576 /* This relocation gets optimized away by the local exec
2577 access optimization. */
2578 BFD_ASSERT (! unresolved_reloc);
2579 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2580 contents + rel->r_offset);
2581 continue;
2582 }
2583
2584 if (htab->sgot == NULL)
2585 abort ();
2586
2587 if (h != NULL)
2588 off = h->got.offset;
2589 else
2590 {
2591 if (local_got_offsets == NULL)
2592 abort ();
2593
2594 off = local_got_offsets[r_symndx];
2595 }
2596
2597 emit_tls_relocs:
2598
2599 if ((off & 1) != 0)
2600 off &= ~1;
2601 else
2602 {
2603 Elf_Internal_Rela outrel;
2604 bfd_byte *loc;
2605 int dr_type, indx;
2606
2607 if (htab->srelgot == NULL)
2608 abort ();
2609
2610 outrel.r_offset = (htab->sgot->output_section->vma
2611 + htab->sgot->output_offset + off);
2612
2613 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2614 if (r_type == R_390_TLS_GD64)
2615 dr_type = R_390_TLS_DTPMOD;
2616 else
2617 dr_type = R_390_TLS_TPOFF;
2618 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2619 outrel.r_addend = relocation - dtpoff_base (info);
2620 else
2621 outrel.r_addend = 0;
2622 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2623 loc = htab->srelgot->contents;
2624 loc += htab->srelgot->reloc_count++
2625 * sizeof (Elf64_External_Rela);
2626 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2627
2628 if (r_type == R_390_TLS_GD64)
2629 {
2630 if (indx == 0)
2631 {
2632 BFD_ASSERT (! unresolved_reloc);
2633 bfd_put_64 (output_bfd,
2634 relocation - dtpoff_base (info),
2635 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2636 }
2637 else
2638 {
2639 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2640 outrel.r_offset += GOT_ENTRY_SIZE;
2641 outrel.r_addend = 0;
2642 htab->srelgot->reloc_count++;
2643 loc += sizeof (Elf64_External_Rela);
2644 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2645 }
2646 }
2647
2648 if (h != NULL)
2649 h->got.offset |= 1;
2650 else
2651 local_got_offsets[r_symndx] |= 1;
2652 }
2653
2654 if (off >= (bfd_vma) -2)
2655 abort ();
2656 if (r_type == ELF64_R_TYPE (rel->r_info))
2657 {
2658 relocation = htab->sgot->output_offset + off;
2659 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2660 relocation += htab->sgot->output_section->vma;
2661 unresolved_reloc = FALSE;
2662 }
2663 else
2664 {
2665 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2666 contents + rel->r_offset);
2667 continue;
2668 }
2669 break;
2670
2671 case R_390_TLS_GOTIE12:
2672 case R_390_TLS_IEENT:
2673 if (h == NULL)
2674 {
2675 if (local_got_offsets == NULL)
2676 abort();
2677 off = local_got_offsets[r_symndx];
2678 if (info->shared)
2679 goto emit_tls_relocs;
2680 }
2681 else
2682 {
2683 off = h->got.offset;
2684 tls_type = elf_s390_hash_entry(h)->tls_type;
2685 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2686 goto emit_tls_relocs;
2687 }
2688
2689 if (htab->sgot == NULL)
2690 abort ();
2691
2692 BFD_ASSERT (! unresolved_reloc);
2693 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2694 htab->sgot->contents + off);
2695 relocation = htab->sgot->output_offset + off;
2696 if (r_type == R_390_TLS_IEENT)
2697 relocation += htab->sgot->output_section->vma;
2698 unresolved_reloc = FALSE;
2699 break;
2700
2701 case R_390_TLS_LDM64:
2702 if (! info->shared)
2703 /* The literal pool entry this relocation refers to gets ignored
2704 by the optimized code of the local exec model. Do nothing
2705 and the value will turn out zero. */
2706 continue;
2707
2708 if (htab->sgot == NULL)
2709 abort ();
2710
2711 off = htab->tls_ldm_got.offset;
2712 if (off & 1)
2713 off &= ~1;
2714 else
2715 {
2716 Elf_Internal_Rela outrel;
2717 bfd_byte *loc;
2718
2719 if (htab->srelgot == NULL)
2720 abort ();
2721
2722 outrel.r_offset = (htab->sgot->output_section->vma
2723 + htab->sgot->output_offset + off);
2724
2725 bfd_put_64 (output_bfd, 0,
2726 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2727 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2728 outrel.r_addend = 0;
2729 loc = htab->srelgot->contents;
2730 loc += htab->srelgot->reloc_count++
2731 * sizeof (Elf64_External_Rela);
2732 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2733 htab->tls_ldm_got.offset |= 1;
2734 }
2735 relocation = htab->sgot->output_offset + off;
2736 unresolved_reloc = FALSE;
2737 break;
2738
2739 case R_390_TLS_LE64:
2740 if (info->shared)
2741 {
2742 /* Linking a shared library with non-fpic code requires
2743 a R_390_TLS_TPOFF relocation. */
2744 Elf_Internal_Rela outrel;
2745 asection *sreloc;
2746 bfd_byte *loc;
2747 int indx;
2748
2749 outrel.r_offset = rel->r_offset
2750 + input_section->output_section->vma
2751 + input_section->output_offset;
2752 if (h != NULL && h->dynindx != -1)
2753 indx = h->dynindx;
2754 else
2755 indx = 0;
2756 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2757 if (indx == 0)
2758 outrel.r_addend = relocation - dtpoff_base (info);
2759 else
2760 outrel.r_addend = 0;
2761 sreloc = elf_section_data (input_section)->sreloc;
2762 if (sreloc == NULL)
2763 abort ();
2764 loc = sreloc->contents;
2765 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2766 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2767 }
2768 else
2769 {
2770 BFD_ASSERT (! unresolved_reloc);
2771 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2772 contents + rel->r_offset);
2773 }
2774 continue;
2775
2776 case R_390_TLS_LDO64:
2777 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2778 relocation -= dtpoff_base (info);
2779 else
2780 /* When converting LDO to LE, we must negate. */
2781 relocation = -tpoff (info, relocation);
2782 break;
2783
2784 /* Relocations for tls instructions. */
2785 case R_390_TLS_LOAD:
2786 case R_390_TLS_GDCALL:
2787 case R_390_TLS_LDCALL:
2788 tls_type = GOT_UNKNOWN;
2789 if (h == NULL && local_got_offsets)
2790 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2791 else if (h != NULL)
2792 tls_type = elf_s390_hash_entry(h)->tls_type;
2793
2794 if (tls_type == GOT_TLS_GD)
2795 continue;
2796
2797 if (r_type == R_390_TLS_LOAD)
2798 {
2799 if (!info->shared && (h == NULL || h->dynindx == -1))
2800 {
2801 /* IE->LE transition. Four valid cases:
2802 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2803 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2804 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2805 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2806 unsigned int insn0, insn1, ry;
2807
2808 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2809 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2810 if (insn1 != 0x0004)
2811 invalid_tls_insn (input_bfd, input_section, rel);
2812 ry = 0;
2813 if ((insn0 & 0xff00f000) == 0xe3000000)
2814 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2815 ry = (insn0 & 0x000f0000);
2816 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2817 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2818 ry = (insn0 & 0x0000f000) << 4;
2819 else if ((insn0 & 0xff00f000) == 0xe300c000)
2820 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2821 ry = (insn0 & 0x000f0000);
2822 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2823 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2824 ry = (insn0 & 0x0000f000) << 4;
2825 else
2826 invalid_tls_insn (input_bfd, input_section, rel);
2827 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2828 insn1 = 0x000d;
2829 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2830 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2831 }
2832 }
2833 else if (r_type == R_390_TLS_GDCALL)
2834 {
2835 unsigned int insn0, insn1;
2836
2837 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2838 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2839 if ((insn0 & 0xffff0000) != 0xc0e50000)
2840 invalid_tls_insn (input_bfd, input_section, rel);
2841 if (!info->shared && (h == NULL || h->dynindx == -1))
2842 {
2843 /* GD->LE transition.
2844 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2845 insn0 = 0xc0040000;
2846 insn1 = 0x0000;
2847 }
2848 else
2849 {
2850 /* GD->IE transition.
2851 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2852 insn0 = 0xe322c000;
2853 insn1 = 0x0004;
2854 }
2855 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2856 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2857 }
2858 else if (r_type == R_390_TLS_LDCALL)
2859 {
2860 if (!info->shared)
2861 {
2862 unsigned int insn0, insn1;
2863
2864 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2865 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2866 if ((insn0 & 0xffff0000) != 0xc0e50000)
2867 invalid_tls_insn (input_bfd, input_section, rel);
2868 /* LD->LE transition.
2869 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2870 insn0 = 0xc0040000;
2871 insn1 = 0x0000;
2872 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2873 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2874 }
2875 }
2876 continue;
2877
2878 default:
2879 break;
2880 }
2881
2882 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2883 because such sections are not SEC_ALLOC and thus ld.so will
2884 not process them. */
2885 if (unresolved_reloc
2886 && !((input_section->flags & SEC_DEBUGGING) != 0
2887 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2888 (*_bfd_error_handler)
2889 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2890 bfd_archive_filename (input_bfd),
2891 bfd_get_section_name (input_bfd, input_section),
2892 (long) rel->r_offset,
2893 h->root.root.string);
2894
2895 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2896 contents, rel->r_offset,
2897 relocation, rel->r_addend);
2898
2899 if (r != bfd_reloc_ok)
2900 {
2901 const char *name;
2902
2903 if (h != NULL)
2904 name = h->root.root.string;
2905 else
2906 {
2907 name = bfd_elf_string_from_elf_section (input_bfd,
2908 symtab_hdr->sh_link,
2909 sym->st_name);
2910 if (name == NULL)
2911 return FALSE;
2912 if (*name == '\0')
2913 name = bfd_section_name (input_bfd, sec);
2914 }
2915
2916 if (r == bfd_reloc_overflow)
2917 {
2918
2919 if (! ((*info->callbacks->reloc_overflow)
2920 (info, name, howto->name, (bfd_vma) 0,
2921 input_bfd, input_section, rel->r_offset)))
2922 return FALSE;
2923 }
2924 else
2925 {
2926 (*_bfd_error_handler)
2927 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2928 bfd_archive_filename (input_bfd),
2929 bfd_get_section_name (input_bfd, input_section),
2930 (long) rel->r_offset, name, (int) r);
2931 return FALSE;
2932 }
2933 }
2934 }
2935
2936 return TRUE;
2937 }
2938
2939 /* Finish up dynamic symbol handling. We set the contents of various
2940 dynamic sections here. */
2941
2942 static bfd_boolean
2943 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
2944 bfd *output_bfd;
2945 struct bfd_link_info *info;
2946 struct elf_link_hash_entry *h;
2947 Elf_Internal_Sym *sym;
2948 {
2949 struct elf_s390_link_hash_table *htab;
2950
2951 htab = elf_s390_hash_table (info);
2952
2953 if (h->plt.offset != (bfd_vma) -1)
2954 {
2955 bfd_vma plt_index;
2956 bfd_vma got_offset;
2957 Elf_Internal_Rela rela;
2958 bfd_byte *loc;
2959
2960 /* This symbol has an entry in the procedure linkage table. Set
2961 it up. */
2962
2963 if (h->dynindx == -1
2964 || htab->splt == NULL
2965 || htab->sgotplt == NULL
2966 || htab->srelplt == NULL)
2967 abort ();
2968
2969 /* Calc. index no.
2970 Current offset - size first entry / entry size. */
2971 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
2972
2973 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
2974 addr & GOT addr. */
2975 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
2976
2977 /* Fill in the blueprint of a PLT. */
2978 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
2979 htab->splt->contents + h->plt.offset);
2980 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
2981 htab->splt->contents + h->plt.offset + 4);
2982 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
2983 htab->splt->contents + h->plt.offset + 8);
2984 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
2985 htab->splt->contents + h->plt.offset + 12);
2986 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
2987 htab->splt->contents + h->plt.offset + 16);
2988 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
2989 htab->splt->contents + h->plt.offset + 20);
2990 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
2991 htab->splt->contents + h->plt.offset + 24);
2992 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
2993 htab->splt->contents + h->plt.offset + 28);
2994 /* Fixup the relative address to the GOT entry */
2995 bfd_put_32 (output_bfd,
2996 (htab->sgotplt->output_section->vma +
2997 htab->sgotplt->output_offset + got_offset
2998 - (htab->splt->output_section->vma + h->plt.offset))/2,
2999 htab->splt->contents + h->plt.offset + 2);
3000 /* Fixup the relative branch to PLT 0 */
3001 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3002 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3003 htab->splt->contents + h->plt.offset + 24);
3004 /* Fixup offset into symbol table */
3005 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3006 htab->splt->contents + h->plt.offset + 28);
3007
3008 /* Fill in the entry in the global offset table.
3009 Points to instruction after GOT offset. */
3010 bfd_put_64 (output_bfd,
3011 (htab->splt->output_section->vma
3012 + htab->splt->output_offset
3013 + h->plt.offset
3014 + 14),
3015 htab->sgotplt->contents + got_offset);
3016
3017 /* Fill in the entry in the .rela.plt section. */
3018 rela.r_offset = (htab->sgotplt->output_section->vma
3019 + htab->sgotplt->output_offset
3020 + got_offset);
3021 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3022 rela.r_addend = 0;
3023 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3024 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3025
3026 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3027 {
3028 /* Mark the symbol as undefined, rather than as defined in
3029 the .plt section. Leave the value alone. This is a clue
3030 for the dynamic linker, to make function pointer
3031 comparisons work between an application and shared
3032 library. */
3033 sym->st_shndx = SHN_UNDEF;
3034 }
3035 }
3036
3037 if (h->got.offset != (bfd_vma) -1
3038 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3039 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3040 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3041 {
3042 Elf_Internal_Rela rela;
3043 bfd_byte *loc;
3044
3045 /* This symbol has an entry in the global offset table. Set it
3046 up. */
3047 if (htab->sgot == NULL || htab->srelgot == NULL)
3048 abort ();
3049
3050 rela.r_offset = (htab->sgot->output_section->vma
3051 + htab->sgot->output_offset
3052 + (h->got.offset &~ (bfd_vma) 1));
3053
3054 /* If this is a static link, or it is a -Bsymbolic link and the
3055 symbol is defined locally or was forced to be local because
3056 of a version file, we just want to emit a RELATIVE reloc.
3057 The entry in the global offset table will already have been
3058 initialized in the relocate_section function. */
3059 if (info->shared
3060 && (info->symbolic
3061 || h->dynindx == -1
3062 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
3063 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3064 {
3065 BFD_ASSERT((h->got.offset & 1) != 0);
3066 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3067 rela.r_addend = (h->root.u.def.value
3068 + h->root.u.def.section->output_section->vma
3069 + h->root.u.def.section->output_offset);
3070 }
3071 else
3072 {
3073 BFD_ASSERT((h->got.offset & 1) == 0);
3074 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3075 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3076 rela.r_addend = 0;
3077 }
3078
3079 loc = htab->srelgot->contents;
3080 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3081 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3082 }
3083
3084 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3085 {
3086 Elf_Internal_Rela rela;
3087 bfd_byte *loc;
3088
3089 /* This symbols needs a copy reloc. Set it up. */
3090
3091 if (h->dynindx == -1
3092 || (h->root.type != bfd_link_hash_defined
3093 && h->root.type != bfd_link_hash_defweak)
3094 || htab->srelbss == NULL)
3095 abort ();
3096
3097 rela.r_offset = (h->root.u.def.value
3098 + h->root.u.def.section->output_section->vma
3099 + h->root.u.def.section->output_offset);
3100 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3101 rela.r_addend = 0;
3102 loc = htab->srelbss->contents;
3103 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3104 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3105 }
3106
3107 /* Mark some specially defined symbols as absolute. */
3108 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3109 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3110 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3111 sym->st_shndx = SHN_ABS;
3112
3113 return TRUE;
3114 }
3115
3116 /* Used to decide how to sort relocs in an optimal manner for the
3117 dynamic linker, before writing them out. */
3118
3119 static enum elf_reloc_type_class
3120 elf_s390_reloc_type_class (rela)
3121 const Elf_Internal_Rela *rela;
3122 {
3123 switch ((int) ELF64_R_TYPE (rela->r_info))
3124 {
3125 case R_390_RELATIVE:
3126 return reloc_class_relative;
3127 case R_390_JMP_SLOT:
3128 return reloc_class_plt;
3129 case R_390_COPY:
3130 return reloc_class_copy;
3131 default:
3132 return reloc_class_normal;
3133 }
3134 }
3135
3136 /* Finish up the dynamic sections. */
3137
3138 static bfd_boolean
3139 elf_s390_finish_dynamic_sections (output_bfd, info)
3140 bfd *output_bfd;
3141 struct bfd_link_info *info;
3142 {
3143 struct elf_s390_link_hash_table *htab;
3144 bfd *dynobj;
3145 asection *sdyn;
3146
3147 htab = elf_s390_hash_table (info);
3148 dynobj = htab->elf.dynobj;
3149 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3150
3151 if (htab->elf.dynamic_sections_created)
3152 {
3153 Elf64_External_Dyn *dyncon, *dynconend;
3154
3155 if (sdyn == NULL || htab->sgot == NULL)
3156 abort ();
3157
3158 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3159 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3160 for (; dyncon < dynconend; dyncon++)
3161 {
3162 Elf_Internal_Dyn dyn;
3163 asection *s;
3164
3165 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3166
3167 switch (dyn.d_tag)
3168 {
3169 default:
3170 continue;
3171
3172 case DT_PLTGOT:
3173 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3174 break;
3175
3176 case DT_JMPREL:
3177 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3178 break;
3179
3180 case DT_PLTRELSZ:
3181 s = htab->srelplt->output_section;
3182 if (s->_cooked_size != 0)
3183 dyn.d_un.d_val = s->_cooked_size;
3184 else
3185 dyn.d_un.d_val = s->_raw_size;
3186 break;
3187
3188 case DT_RELASZ:
3189 /* The procedure linkage table relocs (DT_JMPREL) should
3190 not be included in the overall relocs (DT_RELA).
3191 Therefore, we override the DT_RELASZ entry here to
3192 make it not include the JMPREL relocs. Since the
3193 linker script arranges for .rela.plt to follow all
3194 other relocation sections, we don't have to worry
3195 about changing the DT_RELA entry. */
3196 s = htab->srelplt->output_section;
3197 if (s->_cooked_size != 0)
3198 dyn.d_un.d_val -= s->_cooked_size;
3199 else
3200 dyn.d_un.d_val -= s->_raw_size;
3201 break;
3202 }
3203
3204 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3205 }
3206
3207 /* Fill in the special first entry in the procedure linkage table. */
3208 if (htab->splt && htab->splt->_raw_size > 0)
3209 {
3210 /* fill in blueprint for plt 0 entry */
3211 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3212 htab->splt->contents );
3213 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3214 htab->splt->contents +4 );
3215 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3216 htab->splt->contents +12 );
3217 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3218 htab->splt->contents +16 );
3219 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3220 htab->splt->contents +20 );
3221 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3222 htab->splt->contents + 24);
3223 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3224 htab->splt->contents + 28 );
3225 /* Fixup relative address to start of GOT */
3226 bfd_put_32 (output_bfd,
3227 (htab->sgotplt->output_section->vma +
3228 htab->sgotplt->output_offset
3229 - htab->splt->output_section->vma - 6)/2,
3230 htab->splt->contents + 8);
3231 }
3232 elf_section_data (htab->splt->output_section)
3233 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3234 }
3235
3236 if (htab->sgotplt)
3237 {
3238 /* Fill in the first three entries in the global offset table. */
3239 if (htab->sgotplt->_raw_size > 0)
3240 {
3241 bfd_put_64 (output_bfd,
3242 (sdyn == NULL ? (bfd_vma) 0
3243 : sdyn->output_section->vma + sdyn->output_offset),
3244 htab->sgotplt->contents);
3245 /* One entry for shared object struct ptr. */
3246 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3247 /* One entry for _dl_runtime_resolve. */
3248 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3249 }
3250
3251 elf_section_data (htab->sgot->output_section)
3252 ->this_hdr.sh_entsize = 8;
3253 }
3254 return TRUE;
3255 }
3256
3257 /* Why was the hash table entry size definition changed from
3258 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3259 this is the only reason for the s390_elf64_size_info structure. */
3260
3261 const struct elf_size_info s390_elf64_size_info =
3262 {
3263 sizeof (Elf64_External_Ehdr),
3264 sizeof (Elf64_External_Phdr),
3265 sizeof (Elf64_External_Shdr),
3266 sizeof (Elf64_External_Rel),
3267 sizeof (Elf64_External_Rela),
3268 sizeof (Elf64_External_Sym),
3269 sizeof (Elf64_External_Dyn),
3270 sizeof (Elf_External_Note),
3271 8, /* hash-table entry size. */
3272 1, /* internal relocations per external relocations. */
3273 64, /* arch_size. */
3274 8, /* file_align. */
3275 ELFCLASS64, EV_CURRENT,
3276 bfd_elf64_write_out_phdrs,
3277 bfd_elf64_write_shdrs_and_ehdr,
3278 bfd_elf64_write_relocs,
3279 bfd_elf64_swap_symbol_in,
3280 bfd_elf64_swap_symbol_out,
3281 bfd_elf64_slurp_reloc_table,
3282 bfd_elf64_slurp_symbol_table,
3283 bfd_elf64_swap_dyn_in,
3284 bfd_elf64_swap_dyn_out,
3285 bfd_elf64_swap_reloc_in,
3286 bfd_elf64_swap_reloc_out,
3287 bfd_elf64_swap_reloca_in,
3288 bfd_elf64_swap_reloca_out
3289 };
3290
3291 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3292 #define TARGET_BIG_NAME "elf64-s390"
3293 #define ELF_ARCH bfd_arch_s390
3294 #define ELF_MACHINE_CODE EM_S390
3295 #define ELF_MACHINE_ALT1 EM_S390_OLD
3296 #define ELF_MAXPAGESIZE 0x1000
3297
3298 #define elf_backend_size_info s390_elf64_size_info
3299
3300 #define elf_backend_can_gc_sections 1
3301 #define elf_backend_can_refcount 1
3302 #define elf_backend_want_got_plt 1
3303 #define elf_backend_plt_readonly 1
3304 #define elf_backend_want_plt_sym 0
3305 #define elf_backend_got_header_size 24
3306 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
3307 #define elf_backend_rela_normal 1
3308
3309 #define elf_info_to_howto elf_s390_info_to_howto
3310
3311 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3312 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3313 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3314
3315 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3316 #define elf_backend_check_relocs elf_s390_check_relocs
3317 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3318 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3319 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3320 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3321 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3322 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3323 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3324 #define elf_backend_relocate_section elf_s390_relocate_section
3325 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3326 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3327
3328 #define bfd_elf64_mkobject elf_s390_mkobject
3329 #define elf_backend_object_p elf_s390_object_p
3330
3331 #include "elf64-target.h"
GDB Binutils - Deliverables
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