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(_bfd_mips_elf_relocate_section): Initialise 'value' to avoid compile time
[binutils.git] / bfd / elf64-s390.c
blob1c5a5f73e9e1c7e37d078ac2ffd544530710dc09
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 static asection *elf_s390_gc_mark_hook
50 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
51 struct elf_link_hash_entry *, Elf_Internal_Sym *));
52 static bfd_boolean elf_s390_gc_sweep_hook
53 PARAMS ((bfd *, struct bfd_link_info *, asection *,
54 const Elf_Internal_Rela *));
55 struct elf_s390_link_hash_entry;
56 static void elf_s390_adjust_gotplt
57 PARAMS ((struct elf_s390_link_hash_entry *));
58 static bfd_boolean elf_s390_adjust_dynamic_symbol
59 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
60 static bfd_boolean allocate_dynrelocs
61 PARAMS ((struct elf_link_hash_entry *, PTR));
62 static bfd_boolean readonly_dynrelocs
63 PARAMS ((struct elf_link_hash_entry *, PTR));
64 static bfd_boolean elf_s390_size_dynamic_sections
65 PARAMS ((bfd *, struct bfd_link_info *));
66 static bfd_boolean elf_s390_relocate_section
67 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
68 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
69 static bfd_boolean elf_s390_finish_dynamic_symbol
70 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
71 Elf_Internal_Sym *));
72 static enum elf_reloc_type_class elf_s390_reloc_type_class
73 PARAMS ((const Elf_Internal_Rela *));
74 static bfd_boolean elf_s390_finish_dynamic_sections
75 PARAMS ((bfd *, struct bfd_link_info *));
76 static bfd_boolean elf_s390_mkobject
77 PARAMS ((bfd *));
78 static bfd_boolean elf_s390_object_p
79 PARAMS ((bfd *));
80 static int elf_s390_tls_transition
81 PARAMS ((struct bfd_link_info *, int, int));
82 static bfd_reloc_status_type s390_tls_reloc
83 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
84 static bfd_vma dtpoff_base
85 PARAMS ((struct bfd_link_info *));
86 static bfd_vma tpoff
87 PARAMS ((struct bfd_link_info *, bfd_vma));
88 static void invalid_tls_insn
89 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
90 static bfd_reloc_status_type s390_elf_ldisp_reloc
91 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
92
93 #include "elf/s390.h"
94
95 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
96 from smaller values. Start with zero, widen, *then* decrement. */
97 #define MINUS_ONE (((bfd_vma)0) - 1)
98
99 /* The relocation "howto" table. */
100 static reloc_howto_type elf_howto_table[] =
101 {
102 HOWTO (R_390_NONE, /* type */
103 0, /* rightshift */
104 0, /* size (0 = byte, 1 = short, 2 = long) */
105 0, /* bitsize */
106 FALSE, /* pc_relative */
107 0, /* bitpos */
108 complain_overflow_dont, /* complain_on_overflow */
109 bfd_elf_generic_reloc, /* special_function */
110 "R_390_NONE", /* name */
111 FALSE, /* partial_inplace */
112 0, /* src_mask */
113 0, /* dst_mask */
114 FALSE), /* pcrel_offset */
115
116 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
118 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
119 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
120 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
122 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
124 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
126 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
128 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
130 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
132 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
134 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
136 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
138 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
140 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
142 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
144 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
146 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
148 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
150 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
152 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
154 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
156 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
158 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
160 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
162 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
164 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
166 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
168 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
170 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
172 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
173 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
174 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
176 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
178 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
180 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
181 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
182 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
183 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
184 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
185 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
186 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
187 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
188 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
189 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
190 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
191 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
192 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
193 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
194 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
195 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
196 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
197 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
198 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
199 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
200 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
202 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
203 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
204 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
205 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
206 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
207 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
208 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
210 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
211 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
212 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
213 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
214 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
215 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
216 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
217 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
218 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
219 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
220 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
221 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
222 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
223 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
224 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
225 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
226 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
227 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
228 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
229 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
230 };
231
232 /* GNU extension to record C++ vtable hierarchy. */
233 static reloc_howto_type elf64_s390_vtinherit_howto =
234 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
235 static reloc_howto_type elf64_s390_vtentry_howto =
236 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);
237
238 static reloc_howto_type *
239 elf_s390_reloc_type_lookup (abfd, code)
240 bfd *abfd ATTRIBUTE_UNUSED;
241 bfd_reloc_code_real_type code;
242 {
243 switch (code)
244 {
245 case BFD_RELOC_NONE:
246 return &elf_howto_table[(int) R_390_NONE];
247 case BFD_RELOC_8:
248 return &elf_howto_table[(int) R_390_8];
249 case BFD_RELOC_390_12:
250 return &elf_howto_table[(int) R_390_12];
251 case BFD_RELOC_16:
252 return &elf_howto_table[(int) R_390_16];
253 case BFD_RELOC_32:
254 return &elf_howto_table[(int) R_390_32];
255 case BFD_RELOC_CTOR:
256 return &elf_howto_table[(int) R_390_32];
257 case BFD_RELOC_32_PCREL:
258 return &elf_howto_table[(int) R_390_PC32];
259 case BFD_RELOC_390_GOT12:
260 return &elf_howto_table[(int) R_390_GOT12];
261 case BFD_RELOC_32_GOT_PCREL:
262 return &elf_howto_table[(int) R_390_GOT32];
263 case BFD_RELOC_390_PLT32:
264 return &elf_howto_table[(int) R_390_PLT32];
265 case BFD_RELOC_390_COPY:
266 return &elf_howto_table[(int) R_390_COPY];
267 case BFD_RELOC_390_GLOB_DAT:
268 return &elf_howto_table[(int) R_390_GLOB_DAT];
269 case BFD_RELOC_390_JMP_SLOT:
270 return &elf_howto_table[(int) R_390_JMP_SLOT];
271 case BFD_RELOC_390_RELATIVE:
272 return &elf_howto_table[(int) R_390_RELATIVE];
273 case BFD_RELOC_32_GOTOFF:
274 return &elf_howto_table[(int) R_390_GOTOFF32];
275 case BFD_RELOC_390_GOTPC:
276 return &elf_howto_table[(int) R_390_GOTPC];
277 case BFD_RELOC_390_GOT16:
278 return &elf_howto_table[(int) R_390_GOT16];
279 case BFD_RELOC_16_PCREL:
280 return &elf_howto_table[(int) R_390_PC16];
281 case BFD_RELOC_390_PC16DBL:
282 return &elf_howto_table[(int) R_390_PC16DBL];
283 case BFD_RELOC_390_PLT16DBL:
284 return &elf_howto_table[(int) R_390_PLT16DBL];
285 case BFD_RELOC_390_PC32DBL:
286 return &elf_howto_table[(int) R_390_PC32DBL];
287 case BFD_RELOC_390_PLT32DBL:
288 return &elf_howto_table[(int) R_390_PLT32DBL];
289 case BFD_RELOC_390_GOTPCDBL:
290 return &elf_howto_table[(int) R_390_GOTPCDBL];
291 case BFD_RELOC_64:
292 return &elf_howto_table[(int) R_390_64];
293 case BFD_RELOC_64_PCREL:
294 return &elf_howto_table[(int) R_390_PC64];
295 case BFD_RELOC_390_GOT64:
296 return &elf_howto_table[(int) R_390_GOT64];
297 case BFD_RELOC_390_PLT64:
298 return &elf_howto_table[(int) R_390_PLT64];
299 case BFD_RELOC_390_GOTENT:
300 return &elf_howto_table[(int) R_390_GOTENT];
301 case BFD_RELOC_16_GOTOFF:
302 return &elf_howto_table[(int) R_390_GOTOFF16];
303 case BFD_RELOC_390_GOTOFF64:
304 return &elf_howto_table[(int) R_390_GOTOFF64];
305 case BFD_RELOC_390_GOTPLT12:
306 return &elf_howto_table[(int) R_390_GOTPLT12];
307 case BFD_RELOC_390_GOTPLT16:
308 return &elf_howto_table[(int) R_390_GOTPLT16];
309 case BFD_RELOC_390_GOTPLT32:
310 return &elf_howto_table[(int) R_390_GOTPLT32];
311 case BFD_RELOC_390_GOTPLT64:
312 return &elf_howto_table[(int) R_390_GOTPLT64];
313 case BFD_RELOC_390_GOTPLTENT:
314 return &elf_howto_table[(int) R_390_GOTPLTENT];
315 case BFD_RELOC_390_PLTOFF16:
316 return &elf_howto_table[(int) R_390_PLTOFF16];
317 case BFD_RELOC_390_PLTOFF32:
318 return &elf_howto_table[(int) R_390_PLTOFF32];
319 case BFD_RELOC_390_PLTOFF64:
320 return &elf_howto_table[(int) R_390_PLTOFF64];
321 case BFD_RELOC_390_TLS_LOAD:
322 return &elf_howto_table[(int) R_390_TLS_LOAD];
323 case BFD_RELOC_390_TLS_GDCALL:
324 return &elf_howto_table[(int) R_390_TLS_GDCALL];
325 case BFD_RELOC_390_TLS_LDCALL:
326 return &elf_howto_table[(int) R_390_TLS_LDCALL];
327 case BFD_RELOC_390_TLS_GD64:
328 return &elf_howto_table[(int) R_390_TLS_GD64];
329 case BFD_RELOC_390_TLS_GOTIE12:
330 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
331 case BFD_RELOC_390_TLS_GOTIE64:
332 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
333 case BFD_RELOC_390_TLS_LDM64:
334 return &elf_howto_table[(int) R_390_TLS_LDM64];
335 case BFD_RELOC_390_TLS_IE64:
336 return &elf_howto_table[(int) R_390_TLS_IE64];
337 case BFD_RELOC_390_TLS_IEENT:
338 return &elf_howto_table[(int) R_390_TLS_IEENT];
339 case BFD_RELOC_390_TLS_LE64:
340 return &elf_howto_table[(int) R_390_TLS_LE64];
341 case BFD_RELOC_390_TLS_LDO64:
342 return &elf_howto_table[(int) R_390_TLS_LDO64];
343 case BFD_RELOC_390_TLS_DTPMOD:
344 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
345 case BFD_RELOC_390_TLS_DTPOFF:
346 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
347 case BFD_RELOC_390_TLS_TPOFF:
348 return &elf_howto_table[(int) R_390_TLS_TPOFF];
349 case BFD_RELOC_390_20:
350 return &elf_howto_table[(int) R_390_20];
351 case BFD_RELOC_390_GOT20:
352 return &elf_howto_table[(int) R_390_GOT20];
353 case BFD_RELOC_390_GOTPLT20:
354 return &elf_howto_table[(int) R_390_GOTPLT20];
355 case BFD_RELOC_390_TLS_GOTIE20:
356 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
357 case BFD_RELOC_VTABLE_INHERIT:
358 return &elf64_s390_vtinherit_howto;
359 case BFD_RELOC_VTABLE_ENTRY:
360 return &elf64_s390_vtentry_howto;
361 default:
362 break;
363 }
364 return 0;
365 }
366
367 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
368 and elf64-s390.c has its own copy. */
369
370 static void
371 elf_s390_info_to_howto (abfd, cache_ptr, dst)
372 bfd *abfd ATTRIBUTE_UNUSED;
373 arelent *cache_ptr;
374 Elf_Internal_Rela *dst;
375 {
376 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
377 switch (r_type)
378 {
379 case R_390_GNU_VTINHERIT:
380 cache_ptr->howto = &elf64_s390_vtinherit_howto;
381 break;
382
383 case R_390_GNU_VTENTRY:
384 cache_ptr->howto = &elf64_s390_vtentry_howto;
385 break;
386
387 default:
388 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
389 {
390 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
391 abfd, (int) r_type);
392 r_type = R_390_NONE;
393 }
394 cache_ptr->howto = &elf_howto_table[r_type];
395 }
396 }
397
398 /* A relocation function which doesn't do anything. */
399 static bfd_reloc_status_type
400 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
401 output_bfd, error_message)
402 bfd *abfd ATTRIBUTE_UNUSED;
403 arelent *reloc_entry;
404 asymbol *symbol ATTRIBUTE_UNUSED;
405 PTR data ATTRIBUTE_UNUSED;
406 asection *input_section;
407 bfd *output_bfd;
408 char **error_message ATTRIBUTE_UNUSED;
409 {
410 if (output_bfd)
411 reloc_entry->address += input_section->output_offset;
412 return bfd_reloc_ok;
413 }
414
415 /* Handle the large displacement relocs. */
416 static bfd_reloc_status_type
417 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
418 output_bfd, error_message)
419 bfd *abfd;
420 arelent *reloc_entry;
421 asymbol *symbol;
422 PTR data;
423 asection *input_section;
424 bfd *output_bfd;
425 char **error_message ATTRIBUTE_UNUSED;
426 {
427 reloc_howto_type *howto = reloc_entry->howto;
428 bfd_vma relocation;
429 bfd_vma insn;
430
431 if (output_bfd != (bfd *) NULL
432 && (symbol->flags & BSF_SECTION_SYM) == 0
433 && (! howto->partial_inplace
434 || reloc_entry->addend == 0))
435 {
436 reloc_entry->address += input_section->output_offset;
437 return bfd_reloc_ok;
438 }
439 if (output_bfd != NULL)
440 return bfd_reloc_continue;
441
442 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
443 return bfd_reloc_outofrange;
444
445 relocation = (symbol->value
446 + symbol->section->output_section->vma
447 + symbol->section->output_offset);
448 relocation += reloc_entry->addend;
449 if (howto->pc_relative)
450 {
451 relocation -= (input_section->output_section->vma
452 + input_section->output_offset);
453 relocation -= reloc_entry->address;
454 }
455
456 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
457 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
458 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
459
460 if ((bfd_signed_vma) relocation < - 0x80000
461 || (bfd_signed_vma) relocation > 0x7ffff)
462 return bfd_reloc_overflow;
463 else
464 return bfd_reloc_ok;
465 }
466
467 static bfd_boolean
468 elf_s390_is_local_label_name (abfd, name)
469 bfd *abfd;
470 const char *name;
471 {
472 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
473 return TRUE;
474
475 return _bfd_elf_is_local_label_name (abfd, name);
476 }
477
478 /* Functions for the 390 ELF linker. */
479
480 /* The name of the dynamic interpreter. This is put in the .interp
481 section. */
482
483 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
484
485 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
486 copying dynamic variables from a shared lib into an app's dynbss
487 section, and instead use a dynamic relocation to point into the
488 shared lib. */
489 #define ELIMINATE_COPY_RELOCS 1
490
491 /* The size in bytes of the first entry in the procedure linkage table. */
492 #define PLT_FIRST_ENTRY_SIZE 32
493 /* The size in bytes of an entry in the procedure linkage table. */
494 #define PLT_ENTRY_SIZE 32
495
496 #define GOT_ENTRY_SIZE 8
497
498 /* The first three entries in a procedure linkage table are reserved,
499 and the initial contents are unimportant (we zero them out).
500 Subsequent entries look like this. See the SVR4 ABI 386
501 supplement to see how this works. */
502
503 /* For the s390, simple addr offset can only be 0 - 4096.
504 To use the full 16777216 TB address space, several instructions
505 are needed to load an address in a register and execute
506 a branch( or just saving the address)
507
508 Furthermore, only r 0 and 1 are free to use!!! */
509
510 /* The first 3 words in the GOT are then reserved.
511 Word 0 is the address of the dynamic table.
512 Word 1 is a pointer to a structure describing the object
513 Word 2 is used to point to the loader entry address.
514
515 The code for PLT entries looks like this:
516
517 The GOT holds the address in the PLT to be executed.
518 The loader then gets:
519 24(15) = Pointer to the structure describing the object.
520 28(15) = Offset in symbol table
521 The loader must then find the module where the function is
522 and insert the address in the GOT.
523
524 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
525 LG 1,0(1) # 6 bytes Load address from GOT in r1
526 BCR 15,1 # 2 bytes Jump to address
527 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
528 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
529 BRCL 15,-x # 6 bytes Jump to start of PLT
530 .long ? # 4 bytes offset into symbol table
531
532 Total = 32 bytes per PLT entry
533 Fixup at offset 2: relative address to GOT entry
534 Fixup at offset 22: relative branch to PLT0
535 Fixup at offset 28: 32 bit offset into symbol table
536
537 A 32 bit offset into the symbol table is enough. It allows for symbol
538 tables up to a size of 2 gigabyte. A single dynamic object (the main
539 program, any shared library) is limited to 4GB in size and I want to see
540 the program that manages to have a symbol table of more than 2 GB with a
541 total size of at max 4 GB. */
542
543 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
544 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
545 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
546 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
547 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
548 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
549 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
550 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
551
552 /* The first PLT entry pushes the offset into the symbol table
553 from R1 onto the stack at 8(15) and the loader object info
554 at 12(15), loads the loader address in R1 and jumps to it. */
555
556 /* The first entry in the PLT:
557
558 PLT0:
559 STG 1,56(15) # r1 contains the offset into the symbol table
560 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
561 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
562 LG 1,16(1) # get entry address of loader
563 BCR 15,1 # jump to loader
564
565 Fixup at offset 8: relative address to start of GOT. */
566
567 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
568 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
569 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
570 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
571 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
572 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
573 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
574 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
575
576 /* The s390 linker needs to keep track of the number of relocs that it
577 decides to copy as dynamic relocs in check_relocs for each symbol.
578 This is so that it can later discard them if they are found to be
579 unnecessary. We store the information in a field extending the
580 regular ELF linker hash table. */
581
582 struct elf_s390_dyn_relocs
583 {
584 struct elf_s390_dyn_relocs *next;
585
586 /* The input section of the reloc. */
587 asection *sec;
588
589 /* Total number of relocs copied for the input section. */
590 bfd_size_type count;
591
592 /* Number of pc-relative relocs copied for the input section. */
593 bfd_size_type pc_count;
594 };
595
596 /* s390 ELF linker hash entry. */
597
598 struct elf_s390_link_hash_entry
599 {
600 struct elf_link_hash_entry elf;
601
602 /* Track dynamic relocs copied for this symbol. */
603 struct elf_s390_dyn_relocs *dyn_relocs;
604
605 /* Number of GOTPLT references for a function. */
606 bfd_signed_vma gotplt_refcount;
607
608 #define GOT_UNKNOWN 0
609 #define GOT_NORMAL 1
610 #define GOT_TLS_GD 2
611 #define GOT_TLS_IE 3
612 #define GOT_TLS_IE_NLT 3
613 unsigned char tls_type;
614 };
615
616 #define elf_s390_hash_entry(ent) \
617 ((struct elf_s390_link_hash_entry *)(ent))
618
619 struct elf_s390_obj_tdata
620 {
621 struct elf_obj_tdata root;
622
623 /* tls_type for each local got entry. */
624 char *local_got_tls_type;
625 };
626
627 #define elf_s390_tdata(abfd) \
628 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
629
630 #define elf_s390_local_got_tls_type(abfd) \
631 (elf_s390_tdata (abfd)->local_got_tls_type)
632
633 static bfd_boolean
634 elf_s390_mkobject (abfd)
635 bfd *abfd;
636 {
637 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
638 abfd->tdata.any = bfd_zalloc (abfd, amt);
639 if (abfd->tdata.any == NULL)
640 return FALSE;
641 return TRUE;
642 }
643
644 static bfd_boolean
645 elf_s390_object_p (abfd)
646 bfd *abfd;
647 {
648 /* Set the right machine number for an s390 elf32 file. */
649 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
650 }
651
652 /* s390 ELF linker hash table. */
653
654 struct elf_s390_link_hash_table
655 {
656 struct elf_link_hash_table elf;
657
658 /* Short-cuts to get to dynamic linker sections. */
659 asection *sgot;
660 asection *sgotplt;
661 asection *srelgot;
662 asection *splt;
663 asection *srelplt;
664 asection *sdynbss;
665 asection *srelbss;
666
667 union {
668 bfd_signed_vma refcount;
669 bfd_vma offset;
670 } tls_ldm_got;
671
672 /* Small local sym to section mapping cache. */
673 struct sym_sec_cache sym_sec;
674 };
675
676 /* Get the s390 ELF linker hash table from a link_info structure. */
677
678 #define elf_s390_hash_table(p) \
679 ((struct elf_s390_link_hash_table *) ((p)->hash))
680
681 /* Create an entry in an s390 ELF linker hash table. */
682
683 static struct bfd_hash_entry *
684 link_hash_newfunc (entry, table, string)
685 struct bfd_hash_entry *entry;
686 struct bfd_hash_table *table;
687 const char *string;
688 {
689 /* Allocate the structure if it has not already been allocated by a
690 subclass. */
691 if (entry == NULL)
692 {
693 entry = bfd_hash_allocate (table,
694 sizeof (struct elf_s390_link_hash_entry));
695 if (entry == NULL)
696 return entry;
697 }
698
699 /* Call the allocation method of the superclass. */
700 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
701 if (entry != NULL)
702 {
703 struct elf_s390_link_hash_entry *eh;
704
705 eh = (struct elf_s390_link_hash_entry *) entry;
706 eh->dyn_relocs = NULL;
707 eh->gotplt_refcount = 0;
708 eh->tls_type = GOT_UNKNOWN;
709 }
710
711 return entry;
712 }
713
714 /* Create an s390 ELF linker hash table. */
715
716 static struct bfd_link_hash_table *
717 elf_s390_link_hash_table_create (abfd)
718 bfd *abfd;
719 {
720 struct elf_s390_link_hash_table *ret;
721 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
722
723 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
724 if (ret == NULL)
725 return NULL;
726
727 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
728 {
729 free (ret);
730 return NULL;
731 }
732
733 ret->sgot = NULL;
734 ret->sgotplt = NULL;
735 ret->srelgot = NULL;
736 ret->splt = NULL;
737 ret->srelplt = NULL;
738 ret->sdynbss = NULL;
739 ret->srelbss = NULL;
740 ret->tls_ldm_got.refcount = 0;
741 ret->sym_sec.abfd = NULL;
742
743 return &ret->elf.root;
744 }
745
746 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
747 shortcuts to them in our hash table. */
748
749 static bfd_boolean
750 create_got_section (dynobj, info)
751 bfd *dynobj;
752 struct bfd_link_info *info;
753 {
754 struct elf_s390_link_hash_table *htab;
755
756 if (! _bfd_elf_create_got_section (dynobj, info))
757 return FALSE;
758
759 htab = elf_s390_hash_table (info);
760 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
761 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
762 if (!htab->sgot || !htab->sgotplt)
763 abort ();
764
765 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
766 (SEC_ALLOC | SEC_LOAD
767 | SEC_HAS_CONTENTS
768 | SEC_IN_MEMORY
769 | SEC_LINKER_CREATED
770 | SEC_READONLY));
771 if (htab->srelgot == NULL
772 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
773 return FALSE;
774 return TRUE;
775 }
776
777 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
778 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
779 hash table. */
780
781 static bfd_boolean
782 elf_s390_create_dynamic_sections (dynobj, info)
783 bfd *dynobj;
784 struct bfd_link_info *info;
785 {
786 struct elf_s390_link_hash_table *htab;
787
788 htab = elf_s390_hash_table (info);
789 if (!htab->sgot && !create_got_section (dynobj, info))
790 return FALSE;
791
792 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
793 return FALSE;
794
795 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
796 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
797 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
798 if (!info->shared)
799 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
800
801 if (!htab->splt || !htab->srelplt || !htab->sdynbss
802 || (!info->shared && !htab->srelbss))
803 abort ();
804
805 return TRUE;
806 }
807
808 /* Copy the extra info we tack onto an elf_link_hash_entry. */
809
810 static void
811 elf_s390_copy_indirect_symbol (bed, dir, ind)
812 const struct elf_backend_data *bed;
813 struct elf_link_hash_entry *dir, *ind;
814 {
815 struct elf_s390_link_hash_entry *edir, *eind;
816
817 edir = (struct elf_s390_link_hash_entry *) dir;
818 eind = (struct elf_s390_link_hash_entry *) ind;
819
820 if (eind->dyn_relocs != NULL)
821 {
822 if (edir->dyn_relocs != NULL)
823 {
824 struct elf_s390_dyn_relocs **pp;
825 struct elf_s390_dyn_relocs *p;
826
827 if (ind->root.type == bfd_link_hash_indirect)
828 abort ();
829
830 /* Add reloc counts against the weak sym to the strong sym
831 list. Merge any entries against the same section. */
832 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
833 {
834 struct elf_s390_dyn_relocs *q;
835
836 for (q = edir->dyn_relocs; q != NULL; q = q->next)
837 if (q->sec == p->sec)
838 {
839 q->pc_count += p->pc_count;
840 q->count += p->count;
841 *pp = p->next;
842 break;
843 }
844 if (q == NULL)
845 pp = &p->next;
846 }
847 *pp = edir->dyn_relocs;
848 }
849
850 edir->dyn_relocs = eind->dyn_relocs;
851 eind->dyn_relocs = NULL;
852 }
853
854 if (ind->root.type == bfd_link_hash_indirect
855 && dir->got.refcount <= 0)
856 {
857 edir->tls_type = eind->tls_type;
858 eind->tls_type = GOT_UNKNOWN;
859 }
860
861 if (ELIMINATE_COPY_RELOCS
862 && ind->root.type != bfd_link_hash_indirect
863 && dir->dynamic_adjusted)
864 {
865 /* If called to transfer flags for a weakdef during processing
866 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
867 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
868 dir->ref_dynamic |= ind->ref_dynamic;
869 dir->ref_regular |= ind->ref_regular;
870 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
871 dir->needs_plt |= ind->needs_plt;
872 }
873 else
874 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
875 }
876
877 static int
878 elf_s390_tls_transition (info, r_type, is_local)
879 struct bfd_link_info *info;
880 int r_type;
881 int is_local;
882 {
883 if (info->shared)
884 return r_type;
885
886 switch (r_type)
887 {
888 case R_390_TLS_GD64:
889 case R_390_TLS_IE64:
890 if (is_local)
891 return R_390_TLS_LE64;
892 return R_390_TLS_IE64;
893 case R_390_TLS_GOTIE64:
894 if (is_local)
895 return R_390_TLS_LE64;
896 return R_390_TLS_GOTIE64;
897 case R_390_TLS_LDM64:
898 return R_390_TLS_LE64;
899 }
900
901 return r_type;
902 }
903
904 /* Look through the relocs for a section during the first phase, and
905 allocate space in the global offset table or procedure linkage
906 table. */
907
908 static bfd_boolean
909 elf_s390_check_relocs (abfd, info, sec, relocs)
910 bfd *abfd;
911 struct bfd_link_info *info;
912 asection *sec;
913 const Elf_Internal_Rela *relocs;
914 {
915 struct elf_s390_link_hash_table *htab;
916 Elf_Internal_Shdr *symtab_hdr;
917 struct elf_link_hash_entry **sym_hashes;
918 const Elf_Internal_Rela *rel;
919 const Elf_Internal_Rela *rel_end;
920 asection *sreloc;
921 bfd_signed_vma *local_got_refcounts;
922 int tls_type, old_tls_type;
923
924 if (info->relocatable)
925 return TRUE;
926
927 htab = elf_s390_hash_table (info);
928 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
929 sym_hashes = elf_sym_hashes (abfd);
930 local_got_refcounts = elf_local_got_refcounts (abfd);
931
932 sreloc = NULL;
933
934 rel_end = relocs + sec->reloc_count;
935 for (rel = relocs; rel < rel_end; rel++)
936 {
937 unsigned int r_type;
938 unsigned long r_symndx;
939 struct elf_link_hash_entry *h;
940
941 r_symndx = ELF64_R_SYM (rel->r_info);
942
943 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
944 {
945 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
946 abfd,
947 r_symndx);
948 return FALSE;
949 }
950
951 if (r_symndx < symtab_hdr->sh_info)
952 h = NULL;
953 else
954 {
955 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
956 while (h->root.type == bfd_link_hash_indirect
957 || h->root.type == bfd_link_hash_warning)
958 h = (struct elf_link_hash_entry *) h->root.u.i.link;
959 }
960
961 /* Create got section and local_got_refcounts array if they
962 are needed. */
963 r_type = elf_s390_tls_transition (info,
964 ELF64_R_TYPE (rel->r_info),
965 h == NULL);
966 switch (r_type)
967 {
968 case R_390_GOT12:
969 case R_390_GOT16:
970 case R_390_GOT20:
971 case R_390_GOT32:
972 case R_390_GOT64:
973 case R_390_GOTENT:
974 case R_390_GOTPLT12:
975 case R_390_GOTPLT16:
976 case R_390_GOTPLT20:
977 case R_390_GOTPLT32:
978 case R_390_GOTPLT64:
979 case R_390_GOTPLTENT:
980 case R_390_TLS_GD64:
981 case R_390_TLS_GOTIE12:
982 case R_390_TLS_GOTIE20:
983 case R_390_TLS_GOTIE64:
984 case R_390_TLS_IEENT:
985 case R_390_TLS_IE64:
986 case R_390_TLS_LDM64:
987 if (h == NULL
988 && local_got_refcounts == NULL)
989 {
990 bfd_size_type size;
991
992 size = symtab_hdr->sh_info;
993 size *= (sizeof (bfd_signed_vma) + sizeof(char));
994 local_got_refcounts = ((bfd_signed_vma *)
995 bfd_zalloc (abfd, size));
996 if (local_got_refcounts == NULL)
997 return FALSE;
998 elf_local_got_refcounts (abfd) = local_got_refcounts;
999 elf_s390_local_got_tls_type (abfd)
1000 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1001 }
1002 /* Fall through. */
1003 case R_390_GOTOFF16:
1004 case R_390_GOTOFF32:
1005 case R_390_GOTOFF64:
1006 case R_390_GOTPC:
1007 case R_390_GOTPCDBL:
1008 if (htab->sgot == NULL)
1009 {
1010 if (htab->elf.dynobj == NULL)
1011 htab->elf.dynobj = abfd;
1012 if (!create_got_section (htab->elf.dynobj, info))
1013 return FALSE;
1014 }
1015 }
1016
1017 switch (r_type)
1018 {
1019 case R_390_GOTOFF16:
1020 case R_390_GOTOFF32:
1021 case R_390_GOTOFF64:
1022 case R_390_GOTPC:
1023 case R_390_GOTPCDBL:
1024 /* Got is created, nothing to be done. */
1025 break;
1026
1027 case R_390_PLT16DBL:
1028 case R_390_PLT32:
1029 case R_390_PLT32DBL:
1030 case R_390_PLT64:
1031 case R_390_PLTOFF16:
1032 case R_390_PLTOFF32:
1033 case R_390_PLTOFF64:
1034 /* This symbol requires a procedure linkage table entry. We
1035 actually build the entry in adjust_dynamic_symbol,
1036 because this might be a case of linking PIC code which is
1037 never referenced by a dynamic object, in which case we
1038 don't need to generate a procedure linkage table entry
1039 after all. */
1040
1041 /* If this is a local symbol, we resolve it directly without
1042 creating a procedure linkage table entry. */
1043 if (h != NULL)
1044 {
1045 h->needs_plt = 1;
1046 h->plt.refcount += 1;
1047 }
1048 break;
1049
1050 case R_390_GOTPLT12:
1051 case R_390_GOTPLT16:
1052 case R_390_GOTPLT20:
1053 case R_390_GOTPLT32:
1054 case R_390_GOTPLT64:
1055 case R_390_GOTPLTENT:
1056 /* This symbol requires either a procedure linkage table entry
1057 or an entry in the local got. We actually build the entry
1058 in adjust_dynamic_symbol because whether this is really a
1059 global reference can change and with it the fact if we have
1060 to create a plt entry or a local got entry. To be able to
1061 make a once global symbol a local one we have to keep track
1062 of the number of gotplt references that exist for this
1063 symbol. */
1064 if (h != NULL)
1065 {
1066 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1067 h->needs_plt = 1;
1068 h->plt.refcount += 1;
1069 }
1070 else
1071 local_got_refcounts[r_symndx] += 1;
1072 break;
1073
1074 case R_390_TLS_LDM64:
1075 htab->tls_ldm_got.refcount += 1;
1076 break;
1077
1078 case R_390_TLS_IE64:
1079 case R_390_TLS_GOTIE12:
1080 case R_390_TLS_GOTIE20:
1081 case R_390_TLS_GOTIE64:
1082 case R_390_TLS_IEENT:
1083 if (info->shared)
1084 info->flags |= DF_STATIC_TLS;
1085 /* Fall through */
1086
1087 case R_390_GOT12:
1088 case R_390_GOT16:
1089 case R_390_GOT20:
1090 case R_390_GOT32:
1091 case R_390_GOT64:
1092 case R_390_GOTENT:
1093 case R_390_TLS_GD64:
1094 /* This symbol requires a global offset table entry. */
1095 switch (r_type)
1096 {
1097 default:
1098 case R_390_GOT12:
1099 case R_390_GOT16:
1100 case R_390_GOT20:
1101 case R_390_GOT32:
1102 case R_390_GOTENT:
1103 tls_type = GOT_NORMAL;
1104 break;
1105 case R_390_TLS_GD64:
1106 tls_type = GOT_TLS_GD;
1107 break;
1108 case R_390_TLS_IE64:
1109 case R_390_TLS_GOTIE64:
1110 tls_type = GOT_TLS_IE;
1111 break;
1112 case R_390_TLS_GOTIE12:
1113 case R_390_TLS_GOTIE20:
1114 case R_390_TLS_IEENT:
1115 tls_type = GOT_TLS_IE_NLT;
1116 break;
1117 }
1118
1119 if (h != NULL)
1120 {
1121 h->got.refcount += 1;
1122 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1123 }
1124 else
1125 {
1126 local_got_refcounts[r_symndx] += 1;
1127 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1128 }
1129 /* If a TLS symbol is accessed using IE at least once,
1130 there is no point to use dynamic model for it. */
1131 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1132 {
1133 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1134 {
1135 (*_bfd_error_handler)
1136 (_("%B: `%s' accessed both as normal and thread local symbol"),
1137 abfd, h->root.root.string);
1138 return FALSE;
1139 }
1140 if (old_tls_type > tls_type)
1141 tls_type = old_tls_type;
1142 }
1143
1144 if (old_tls_type != tls_type)
1145 {
1146 if (h != NULL)
1147 elf_s390_hash_entry (h)->tls_type = tls_type;
1148 else
1149 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1150 }
1151
1152 if (r_type != R_390_TLS_IE64)
1153 break;
1154 /* Fall through */
1155
1156 case R_390_TLS_LE64:
1157 if (!info->shared)
1158 break;
1159 info->flags |= DF_STATIC_TLS;
1160 /* Fall through */
1161
1162 case R_390_8:
1163 case R_390_16:
1164 case R_390_32:
1165 case R_390_64:
1166 case R_390_PC16:
1167 case R_390_PC16DBL:
1168 case R_390_PC32:
1169 case R_390_PC32DBL:
1170 case R_390_PC64:
1171 if (h != NULL && !info->shared)
1172 {
1173 /* If this reloc is in a read-only section, we might
1174 need a copy reloc. We can't check reliably at this
1175 stage whether the section is read-only, as input
1176 sections have not yet been mapped to output sections.
1177 Tentatively set the flag for now, and correct in
1178 adjust_dynamic_symbol. */
1179 h->non_got_ref = 1;
1180
1181 /* We may need a .plt entry if the function this reloc
1182 refers to is in a shared lib. */
1183 h->plt.refcount += 1;
1184 }
1185
1186 /* If we are creating a shared library, and this is a reloc
1187 against a global symbol, or a non PC relative reloc
1188 against a local symbol, then we need to copy the reloc
1189 into the shared library. However, if we are linking with
1190 -Bsymbolic, we do not need to copy a reloc against a
1191 global symbol which is defined in an object we are
1192 including in the link (i.e., DEF_REGULAR is set). At
1193 this point we have not seen all the input files, so it is
1194 possible that DEF_REGULAR is not set now but will be set
1195 later (it is never cleared). In case of a weak definition,
1196 DEF_REGULAR may be cleared later by a strong definition in
1197 a shared library. We account for that possibility below by
1198 storing information in the relocs_copied field of the hash
1199 table entry. A similar situation occurs when creating
1200 shared libraries and symbol visibility changes render the
1201 symbol local.
1202
1203 If on the other hand, we are creating an executable, we
1204 may need to keep relocations for symbols satisfied by a
1205 dynamic library if we manage to avoid copy relocs for the
1206 symbol. */
1207 if ((info->shared
1208 && (sec->flags & SEC_ALLOC) != 0
1209 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1210 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1211 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1212 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1213 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1214 || (h != NULL
1215 && (! info->symbolic
1216 || h->root.type == bfd_link_hash_defweak
1217 || !h->def_regular))))
1218 || (ELIMINATE_COPY_RELOCS
1219 && !info->shared
1220 && (sec->flags & SEC_ALLOC) != 0
1221 && h != NULL
1222 && (h->root.type == bfd_link_hash_defweak
1223 || !h->def_regular)))
1224 {
1225 struct elf_s390_dyn_relocs *p;
1226 struct elf_s390_dyn_relocs **head;
1227
1228 /* We must copy these reloc types into the output file.
1229 Create a reloc section in dynobj and make room for
1230 this reloc. */
1231 if (sreloc == NULL)
1232 {
1233 const char *name;
1234 bfd *dynobj;
1235
1236 name = (bfd_elf_string_from_elf_section
1237 (abfd,
1238 elf_elfheader (abfd)->e_shstrndx,
1239 elf_section_data (sec)->rel_hdr.sh_name));
1240 if (name == NULL)
1241 return FALSE;
1242
1243 if (strncmp (name, ".rela", 5) != 0
1244 || strcmp (bfd_get_section_name (abfd, sec),
1245 name + 5) != 0)
1246 {
1247 (*_bfd_error_handler)
1248 (_("%B: bad relocation section name `%s\'"),
1249 abfd, name);
1250 }
1251
1252 if (htab->elf.dynobj == NULL)
1253 htab->elf.dynobj = abfd;
1254
1255 dynobj = htab->elf.dynobj;
1256 sreloc = bfd_get_section_by_name (dynobj, name);
1257 if (sreloc == NULL)
1258 {
1259 flagword flags;
1260
1261 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1262 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1263 if ((sec->flags & SEC_ALLOC) != 0)
1264 flags |= SEC_ALLOC | SEC_LOAD;
1265 sreloc = bfd_make_section_with_flags (dynobj,
1266 name,
1267 flags);
1268 if (sreloc == NULL
1269 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1270 return FALSE;
1271 }
1272 elf_section_data (sec)->sreloc = sreloc;
1273 }
1274
1275 /* If this is a global symbol, we count the number of
1276 relocations we need for this symbol. */
1277 if (h != NULL)
1278 {
1279 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1280 }
1281 else
1282 {
1283 /* Track dynamic relocs needed for local syms too.
1284 We really need local syms available to do this
1285 easily. Oh well. */
1286
1287 asection *s;
1288 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1289 sec, r_symndx);
1290 if (s == NULL)
1291 return FALSE;
1292
1293 head = ((struct elf_s390_dyn_relocs **)
1294 &elf_section_data (s)->local_dynrel);
1295 }
1296
1297 p = *head;
1298 if (p == NULL || p->sec != sec)
1299 {
1300 bfd_size_type amt = sizeof *p;
1301 p = ((struct elf_s390_dyn_relocs *)
1302 bfd_alloc (htab->elf.dynobj, amt));
1303 if (p == NULL)
1304 return FALSE;
1305 p->next = *head;
1306 *head = p;
1307 p->sec = sec;
1308 p->count = 0;
1309 p->pc_count = 0;
1310 }
1311
1312 p->count += 1;
1313 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1314 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1315 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1316 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1317 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1318 p->pc_count += 1;
1319 }
1320 break;
1321
1322 /* This relocation describes the C++ object vtable hierarchy.
1323 Reconstruct it for later use during GC. */
1324 case R_390_GNU_VTINHERIT:
1325 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1326 return FALSE;
1327 break;
1328
1329 /* This relocation describes which C++ vtable entries are actually
1330 used. Record for later use during GC. */
1331 case R_390_GNU_VTENTRY:
1332 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1333 return FALSE;
1334 break;
1335
1336 default:
1337 break;
1338 }
1339 }
1340
1341 return TRUE;
1342 }
1343
1344 /* Return the section that should be marked against GC for a given
1345 relocation. */
1346
1347 static asection *
1348 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1349 asection *sec;
1350 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1351 Elf_Internal_Rela *rel;
1352 struct elf_link_hash_entry *h;
1353 Elf_Internal_Sym *sym;
1354 {
1355 if (h != NULL)
1356 {
1357 switch (ELF64_R_TYPE (rel->r_info))
1358 {
1359 case R_390_GNU_VTINHERIT:
1360 case R_390_GNU_VTENTRY:
1361 break;
1362
1363 default:
1364 switch (h->root.type)
1365 {
1366 case bfd_link_hash_defined:
1367 case bfd_link_hash_defweak:
1368 return h->root.u.def.section;
1369
1370 case bfd_link_hash_common:
1371 return h->root.u.c.p->section;
1372
1373 default:
1374 break;
1375 }
1376 }
1377 }
1378 else
1379 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1380
1381 return NULL;
1382 }
1383
1384 /* Update the got entry reference counts for the section being removed. */
1385
1386 static bfd_boolean
1387 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1388 bfd *abfd;
1389 struct bfd_link_info *info;
1390 asection *sec;
1391 const Elf_Internal_Rela *relocs;
1392 {
1393 Elf_Internal_Shdr *symtab_hdr;
1394 struct elf_link_hash_entry **sym_hashes;
1395 bfd_signed_vma *local_got_refcounts;
1396 const Elf_Internal_Rela *rel, *relend;
1397
1398 elf_section_data (sec)->local_dynrel = NULL;
1399
1400 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1401 sym_hashes = elf_sym_hashes (abfd);
1402 local_got_refcounts = elf_local_got_refcounts (abfd);
1403
1404 relend = relocs + sec->reloc_count;
1405 for (rel = relocs; rel < relend; rel++)
1406 {
1407 unsigned long r_symndx;
1408 unsigned int r_type;
1409 struct elf_link_hash_entry *h = NULL;
1410
1411 r_symndx = ELF64_R_SYM (rel->r_info);
1412 if (r_symndx >= symtab_hdr->sh_info)
1413 {
1414 struct elf_s390_link_hash_entry *eh;
1415 struct elf_s390_dyn_relocs **pp;
1416 struct elf_s390_dyn_relocs *p;
1417
1418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1419 while (h->root.type == bfd_link_hash_indirect
1420 || h->root.type == bfd_link_hash_warning)
1421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1422 eh = (struct elf_s390_link_hash_entry *) h;
1423
1424 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1425 if (p->sec == sec)
1426 {
1427 /* Everything must go for SEC. */
1428 *pp = p->next;
1429 break;
1430 }
1431 }
1432
1433 r_type = ELF64_R_TYPE (rel->r_info);
1434 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1435 switch (r_type)
1436 {
1437 case R_390_TLS_LDM64:
1438 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1439 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1440 break;
1441
1442 case R_390_TLS_GD64:
1443 case R_390_TLS_IE64:
1444 case R_390_TLS_GOTIE12:
1445 case R_390_TLS_GOTIE20:
1446 case R_390_TLS_GOTIE64:
1447 case R_390_TLS_IEENT:
1448 case R_390_GOT12:
1449 case R_390_GOT16:
1450 case R_390_GOT20:
1451 case R_390_GOT32:
1452 case R_390_GOT64:
1453 case R_390_GOTOFF16:
1454 case R_390_GOTOFF32:
1455 case R_390_GOTOFF64:
1456 case R_390_GOTPC:
1457 case R_390_GOTPCDBL:
1458 case R_390_GOTENT:
1459 if (h != NULL)
1460 {
1461 if (h->got.refcount > 0)
1462 h->got.refcount -= 1;
1463 }
1464 else if (local_got_refcounts != NULL)
1465 {
1466 if (local_got_refcounts[r_symndx] > 0)
1467 local_got_refcounts[r_symndx] -= 1;
1468 }
1469 break;
1470
1471 case R_390_8:
1472 case R_390_12:
1473 case R_390_16:
1474 case R_390_20:
1475 case R_390_32:
1476 case R_390_64:
1477 case R_390_PC16:
1478 case R_390_PC16DBL:
1479 case R_390_PC32:
1480 case R_390_PC32DBL:
1481 case R_390_PC64:
1482 if (info->shared)
1483 break;
1484 /* Fall through */
1485
1486 case R_390_PLT16DBL:
1487 case R_390_PLT32:
1488 case R_390_PLT32DBL:
1489 case R_390_PLT64:
1490 case R_390_PLTOFF16:
1491 case R_390_PLTOFF32:
1492 case R_390_PLTOFF64:
1493 if (h != NULL)
1494 {
1495 if (h->plt.refcount > 0)
1496 h->plt.refcount -= 1;
1497 }
1498 break;
1499
1500 case R_390_GOTPLT12:
1501 case R_390_GOTPLT16:
1502 case R_390_GOTPLT20:
1503 case R_390_GOTPLT32:
1504 case R_390_GOTPLT64:
1505 case R_390_GOTPLTENT:
1506 if (h != NULL)
1507 {
1508 if (h->plt.refcount > 0)
1509 {
1510 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1511 h->plt.refcount -= 1;
1512 }
1513 }
1514 else if (local_got_refcounts != NULL)
1515 {
1516 if (local_got_refcounts[r_symndx] > 0)
1517 local_got_refcounts[r_symndx] -= 1;
1518 }
1519 break;
1520
1521 default:
1522 break;
1523 }
1524 }
1525
1526 return TRUE;
1527 }
1528
1529 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1530 entry but we found we will not create any. Called when we find we will
1531 not have any PLT for this symbol, by for example
1532 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1533 or elf_s390_size_dynamic_sections if no dynamic sections will be
1534 created (we're only linking static objects). */
1535
1536 static void
1537 elf_s390_adjust_gotplt (h)
1538 struct elf_s390_link_hash_entry *h;
1539 {
1540 if (h->elf.root.type == bfd_link_hash_warning)
1541 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1542
1543 if (h->gotplt_refcount <= 0)
1544 return;
1545
1546 /* We simply add the number of gotplt references to the number
1547 * of got references for this symbol. */
1548 h->elf.got.refcount += h->gotplt_refcount;
1549 h->gotplt_refcount = -1;
1550 }
1551
1552 /* Adjust a symbol defined by a dynamic object and referenced by a
1553 regular object. The current definition is in some section of the
1554 dynamic object, but we're not including those sections. We have to
1555 change the definition to something the rest of the link can
1556 understand. */
1557
1558 static bfd_boolean
1559 elf_s390_adjust_dynamic_symbol (info, h)
1560 struct bfd_link_info *info;
1561 struct elf_link_hash_entry *h;
1562 {
1563 struct elf_s390_link_hash_table *htab;
1564 asection *s;
1565 unsigned int power_of_two;
1566
1567 /* If this is a function, put it in the procedure linkage table. We
1568 will fill in the contents of the procedure linkage table later
1569 (although we could actually do it here). */
1570 if (h->type == STT_FUNC
1571 || h->needs_plt)
1572 {
1573 if (h->plt.refcount <= 0
1574 || (! info->shared
1575 && !h->def_dynamic
1576 && !h->ref_dynamic
1577 && h->root.type != bfd_link_hash_undefweak
1578 && h->root.type != bfd_link_hash_undefined))
1579 {
1580 /* This case can occur if we saw a PLT32 reloc in an input
1581 file, but the symbol was never referred to by a dynamic
1582 object, or if all references were garbage collected. In
1583 such a case, we don't actually need to build a procedure
1584 linkage table, and we can just do a PC32 reloc instead. */
1585 h->plt.offset = (bfd_vma) -1;
1586 h->needs_plt = 0;
1587 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1588 }
1589
1590 return TRUE;
1591 }
1592 else
1593 /* It's possible that we incorrectly decided a .plt reloc was
1594 needed for an R_390_PC32 reloc to a non-function sym in
1595 check_relocs. We can't decide accurately between function and
1596 non-function syms in check-relocs; Objects loaded later in
1597 the link may change h->type. So fix it now. */
1598 h->plt.offset = (bfd_vma) -1;
1599
1600 /* If this is a weak symbol, and there is a real definition, the
1601 processor independent code will have arranged for us to see the
1602 real definition first, and we can just use the same value. */
1603 if (h->u.weakdef != NULL)
1604 {
1605 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1606 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1607 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1608 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1609 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1610 h->non_got_ref = h->u.weakdef->non_got_ref;
1611 return TRUE;
1612 }
1613
1614 /* This is a reference to a symbol defined by a dynamic object which
1615 is not a function. */
1616
1617 /* If we are creating a shared library, we must presume that the
1618 only references to the symbol are via the global offset table.
1619 For such cases we need not do anything here; the relocations will
1620 be handled correctly by relocate_section. */
1621 if (info->shared)
1622 return TRUE;
1623
1624 /* If there are no references to this symbol that do not use the
1625 GOT, we don't need to generate a copy reloc. */
1626 if (!h->non_got_ref)
1627 return TRUE;
1628
1629 /* If -z nocopyreloc was given, we won't generate them either. */
1630 if (info->nocopyreloc)
1631 {
1632 h->non_got_ref = 0;
1633 return TRUE;
1634 }
1635
1636 if (ELIMINATE_COPY_RELOCS)
1637 {
1638 struct elf_s390_link_hash_entry * eh;
1639 struct elf_s390_dyn_relocs *p;
1640
1641 eh = (struct elf_s390_link_hash_entry *) h;
1642 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1643 {
1644 s = p->sec->output_section;
1645 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1646 break;
1647 }
1648
1649 /* If we didn't find any dynamic relocs in read-only sections, then
1650 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1651 if (p == NULL)
1652 {
1653 h->non_got_ref = 0;
1654 return TRUE;
1655 }
1656 }
1657
1658 if (h->size == 0)
1659 {
1660 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1661 h->root.root.string);
1662 return TRUE;
1663 }
1664
1665 /* We must allocate the symbol in our .dynbss section, which will
1666 become part of the .bss section of the executable. There will be
1667 an entry for this symbol in the .dynsym section. The dynamic
1668 object will contain position independent code, so all references
1669 from the dynamic object to this symbol will go through the global
1670 offset table. The dynamic linker will use the .dynsym entry to
1671 determine the address it must put in the global offset table, so
1672 both the dynamic object and the regular object will refer to the
1673 same memory location for the variable. */
1674
1675 htab = elf_s390_hash_table (info);
1676
1677 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1678 copy the initial value out of the dynamic object and into the
1679 runtime process image. */
1680 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1681 {
1682 htab->srelbss->size += sizeof (Elf64_External_Rela);
1683 h->needs_copy = 1;
1684 }
1685
1686 /* We need to figure out the alignment required for this symbol. I
1687 have no idea how ELF linkers handle this. */
1688 power_of_two = bfd_log2 (h->size);
1689 if (power_of_two > 3)
1690 power_of_two = 3;
1691
1692 /* Apply the required alignment. */
1693 s = htab->sdynbss;
1694 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1695 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1696 {
1697 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1698 return FALSE;
1699 }
1700
1701 /* Define the symbol as being at this point in the section. */
1702 h->root.u.def.section = s;
1703 h->root.u.def.value = s->size;
1704
1705 /* Increment the section size to make room for the symbol. */
1706 s->size += h->size;
1707
1708 return TRUE;
1709 }
1710
1711 /* Allocate space in .plt, .got and associated reloc sections for
1712 dynamic relocs. */
1713
1714 static bfd_boolean
1715 allocate_dynrelocs (h, inf)
1716 struct elf_link_hash_entry *h;
1717 PTR inf;
1718 {
1719 struct bfd_link_info *info;
1720 struct elf_s390_link_hash_table *htab;
1721 struct elf_s390_link_hash_entry *eh;
1722 struct elf_s390_dyn_relocs *p;
1723
1724 if (h->root.type == bfd_link_hash_indirect)
1725 return TRUE;
1726
1727 if (h->root.type == bfd_link_hash_warning)
1728 /* When warning symbols are created, they **replace** the "real"
1729 entry in the hash table, thus we never get to see the real
1730 symbol in a hash traversal. So look at it now. */
1731 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1732
1733 info = (struct bfd_link_info *) inf;
1734 htab = elf_s390_hash_table (info);
1735
1736 if (htab->elf.dynamic_sections_created
1737 && h->plt.refcount > 0
1738 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1739 || h->root.type != bfd_link_hash_undefweak))
1740 {
1741 /* Make sure this symbol is output as a dynamic symbol.
1742 Undefined weak syms won't yet be marked as dynamic. */
1743 if (h->dynindx == -1
1744 && !h->forced_local)
1745 {
1746 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1747 return FALSE;
1748 }
1749
1750 if (info->shared
1751 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1752 {
1753 asection *s = htab->splt;
1754
1755 /* If this is the first .plt entry, make room for the special
1756 first entry. */
1757 if (s->size == 0)
1758 s->size += PLT_FIRST_ENTRY_SIZE;
1759
1760 h->plt.offset = s->size;
1761
1762 /* If this symbol is not defined in a regular file, and we are
1763 not generating a shared library, then set the symbol to this
1764 location in the .plt. This is required to make function
1765 pointers compare as equal between the normal executable and
1766 the shared library. */
1767 if (! info->shared
1768 && !h->def_regular)
1769 {
1770 h->root.u.def.section = s;
1771 h->root.u.def.value = h->plt.offset;
1772 }
1773
1774 /* Make room for this entry. */
1775 s->size += PLT_ENTRY_SIZE;
1776
1777 /* We also need to make an entry in the .got.plt section, which
1778 will be placed in the .got section by the linker script. */
1779 htab->sgotplt->size += GOT_ENTRY_SIZE;
1780
1781 /* We also need to make an entry in the .rela.plt section. */
1782 htab->srelplt->size += sizeof (Elf64_External_Rela);
1783 }
1784 else
1785 {
1786 h->plt.offset = (bfd_vma) -1;
1787 h->needs_plt = 0;
1788 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1789 }
1790 }
1791 else
1792 {
1793 h->plt.offset = (bfd_vma) -1;
1794 h->needs_plt = 0;
1795 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1796 }
1797
1798 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1799 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1800 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1801 we can save the dynamic TLS relocation. */
1802 if (h->got.refcount > 0
1803 && !info->shared
1804 && h->dynindx == -1
1805 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1806 {
1807 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1808 /* For the GOTIE access without a literal pool entry the offset has
1809 to be stored somewhere. The immediate value in the instruction
1810 is not bit enough so the value is stored in the got. */
1811 {
1812 h->got.offset = htab->sgot->size;
1813 htab->sgot->size += GOT_ENTRY_SIZE;
1814 }
1815 else
1816 h->got.offset = (bfd_vma) -1;
1817 }
1818 else if (h->got.refcount > 0)
1819 {
1820 asection *s;
1821 bfd_boolean dyn;
1822 int tls_type = elf_s390_hash_entry(h)->tls_type;
1823
1824 /* Make sure this symbol is output as a dynamic symbol.
1825 Undefined weak syms won't yet be marked as dynamic. */
1826 if (h->dynindx == -1
1827 && !h->forced_local)
1828 {
1829 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1830 return FALSE;
1831 }
1832
1833 s = htab->sgot;
1834 h->got.offset = s->size;
1835 s->size += GOT_ENTRY_SIZE;
1836 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1837 if (tls_type == GOT_TLS_GD)
1838 s->size += GOT_ENTRY_SIZE;
1839 dyn = htab->elf.dynamic_sections_created;
1840 /* R_390_TLS_IE64 needs one dynamic relocation,
1841 R_390_TLS_GD64 needs one if local symbol and two if global. */
1842 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1843 || tls_type >= GOT_TLS_IE)
1844 htab->srelgot->size += sizeof (Elf64_External_Rela);
1845 else if (tls_type == GOT_TLS_GD)
1846 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1847 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1848 || h->root.type != bfd_link_hash_undefweak)
1849 && (info->shared
1850 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1851 htab->srelgot->size += sizeof (Elf64_External_Rela);
1852 }
1853 else
1854 h->got.offset = (bfd_vma) -1;
1855
1856 eh = (struct elf_s390_link_hash_entry *) h;
1857 if (eh->dyn_relocs == NULL)
1858 return TRUE;
1859
1860 /* In the shared -Bsymbolic case, discard space allocated for
1861 dynamic pc-relative relocs against symbols which turn out to be
1862 defined in regular objects. For the normal shared case, discard
1863 space for pc-relative relocs that have become local due to symbol
1864 visibility changes. */
1865
1866 if (info->shared)
1867 {
1868 if (SYMBOL_REFERENCES_LOCAL (info, h))
1869 {
1870 struct elf_s390_dyn_relocs **pp;
1871
1872 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1873 {
1874 p->count -= p->pc_count;
1875 p->pc_count = 0;
1876 if (p->count == 0)
1877 *pp = p->next;
1878 else
1879 pp = &p->next;
1880 }
1881 }
1882
1883 /* Also discard relocs on undefined weak syms with non-default
1884 visibility. */
1885 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1886 && h->root.type == bfd_link_hash_undefweak)
1887 eh->dyn_relocs = NULL;
1888 }
1889 else if (ELIMINATE_COPY_RELOCS)
1890 {
1891 /* For the non-shared case, discard space for relocs against
1892 symbols which turn out to need copy relocs or are not
1893 dynamic. */
1894
1895 if (!h->non_got_ref
1896 && ((h->def_dynamic
1897 && !h->def_regular)
1898 || (htab->elf.dynamic_sections_created
1899 && (h->root.type == bfd_link_hash_undefweak
1900 || h->root.type == bfd_link_hash_undefined))))
1901 {
1902 /* Make sure this symbol is output as a dynamic symbol.
1903 Undefined weak syms won't yet be marked as dynamic. */
1904 if (h->dynindx == -1
1905 && !h->forced_local)
1906 {
1907 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1908 return FALSE;
1909 }
1910
1911 /* If that succeeded, we know we'll be keeping all the
1912 relocs. */
1913 if (h->dynindx != -1)
1914 goto keep;
1915 }
1916
1917 eh->dyn_relocs = NULL;
1918
1919 keep: ;
1920 }
1921
1922 /* Finally, allocate space. */
1923 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1924 {
1925 asection *sreloc = elf_section_data (p->sec)->sreloc;
1926 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1927 }
1928
1929 return TRUE;
1930 }
1931
1932 /* Find any dynamic relocs that apply to read-only sections. */
1933
1934 static bfd_boolean
1935 readonly_dynrelocs (h, inf)
1936 struct elf_link_hash_entry *h;
1937 PTR inf;
1938 {
1939 struct elf_s390_link_hash_entry *eh;
1940 struct elf_s390_dyn_relocs *p;
1941
1942 if (h->root.type == bfd_link_hash_warning)
1943 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1944
1945 eh = (struct elf_s390_link_hash_entry *) h;
1946 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1947 {
1948 asection *s = p->sec->output_section;
1949
1950 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1951 {
1952 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1953
1954 info->flags |= DF_TEXTREL;
1955
1956 /* Not an error, just cut short the traversal. */
1957 return FALSE;
1958 }
1959 }
1960 return TRUE;
1961 }
1962
1963 /* Set the sizes of the dynamic sections. */
1964
1965 static bfd_boolean
1966 elf_s390_size_dynamic_sections (output_bfd, info)
1967 bfd *output_bfd ATTRIBUTE_UNUSED;
1968 struct bfd_link_info *info;
1969 {
1970 struct elf_s390_link_hash_table *htab;
1971 bfd *dynobj;
1972 asection *s;
1973 bfd_boolean relocs;
1974 bfd *ibfd;
1975
1976 htab = elf_s390_hash_table (info);
1977 dynobj = htab->elf.dynobj;
1978 if (dynobj == NULL)
1979 abort ();
1980
1981 if (htab->elf.dynamic_sections_created)
1982 {
1983 /* Set the contents of the .interp section to the interpreter. */
1984 if (info->executable)
1985 {
1986 s = bfd_get_section_by_name (dynobj, ".interp");
1987 if (s == NULL)
1988 abort ();
1989 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1990 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1991 }
1992 }
1993
1994 /* Set up .got offsets for local syms, and space for local dynamic
1995 relocs. */
1996 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1997 {
1998 bfd_signed_vma *local_got;
1999 bfd_signed_vma *end_local_got;
2000 char *local_tls_type;
2001 bfd_size_type locsymcount;
2002 Elf_Internal_Shdr *symtab_hdr;
2003 asection *srela;
2004
2005 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2006 continue;
2007
2008 for (s = ibfd->sections; s != NULL; s = s->next)
2009 {
2010 struct elf_s390_dyn_relocs *p;
2011
2012 for (p = *((struct elf_s390_dyn_relocs **)
2013 &elf_section_data (s)->local_dynrel);
2014 p != NULL;
2015 p = p->next)
2016 {
2017 if (!bfd_is_abs_section (p->sec)
2018 && bfd_is_abs_section (p->sec->output_section))
2019 {
2020 /* Input section has been discarded, either because
2021 it is a copy of a linkonce section or due to
2022 linker script /DISCARD/, so we'll be discarding
2023 the relocs too. */
2024 }
2025 else if (p->count != 0)
2026 {
2027 srela = elf_section_data (p->sec)->sreloc;
2028 srela->size += p->count * sizeof (Elf64_External_Rela);
2029 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2030 info->flags |= DF_TEXTREL;
2031 }
2032 }
2033 }
2034
2035 local_got = elf_local_got_refcounts (ibfd);
2036 if (!local_got)
2037 continue;
2038
2039 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2040 locsymcount = symtab_hdr->sh_info;
2041 end_local_got = local_got + locsymcount;
2042 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2043 s = htab->sgot;
2044 srela = htab->srelgot;
2045 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2046 {
2047 if (*local_got > 0)
2048 {
2049 *local_got = s->size;
2050 s->size += GOT_ENTRY_SIZE;
2051 if (*local_tls_type == GOT_TLS_GD)
2052 s->size += GOT_ENTRY_SIZE;
2053 if (info->shared)
2054 srela->size += sizeof (Elf64_External_Rela);
2055 }
2056 else
2057 *local_got = (bfd_vma) -1;
2058 }
2059 }
2060
2061 if (htab->tls_ldm_got.refcount > 0)
2062 {
2063 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2064 relocs. */
2065 htab->tls_ldm_got.offset = htab->sgot->size;
2066 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2067 htab->srelgot->size += sizeof (Elf64_External_Rela);
2068 }
2069 else
2070 htab->tls_ldm_got.offset = -1;
2071
2072 /* Allocate global sym .plt and .got entries, and space for global
2073 sym dynamic relocs. */
2074 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2075
2076 /* We now have determined the sizes of the various dynamic sections.
2077 Allocate memory for them. */
2078 relocs = FALSE;
2079 for (s = dynobj->sections; s != NULL; s = s->next)
2080 {
2081 if ((s->flags & SEC_LINKER_CREATED) == 0)
2082 continue;
2083
2084 if (s == htab->splt
2085 || s == htab->sgot
2086 || s == htab->sgotplt
2087 || s == htab->sdynbss)
2088 {
2089 /* Strip this section if we don't need it; see the
2090 comment below. */
2091 }
2092 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2093 {
2094 if (s->size != 0 && s != htab->srelplt)
2095 relocs = TRUE;
2096
2097 /* We use the reloc_count field as a counter if we need
2098 to copy relocs into the output file. */
2099 s->reloc_count = 0;
2100 }
2101 else
2102 {
2103 /* It's not one of our sections, so don't allocate space. */
2104 continue;
2105 }
2106
2107 if (s->size == 0)
2108 {
2109 /* If we don't need this section, strip it from the
2110 output file. This is to handle .rela.bss and
2111 .rela.plt. We must create it in
2112 create_dynamic_sections, because it must be created
2113 before the linker maps input sections to output
2114 sections. The linker does that before
2115 adjust_dynamic_symbol is called, and it is that
2116 function which decides whether anything needs to go
2117 into these sections. */
2118
2119 s->flags |= SEC_EXCLUDE;
2120 continue;
2121 }
2122
2123 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2124 continue;
2125
2126 /* Allocate memory for the section contents. We use bfd_zalloc
2127 here in case unused entries are not reclaimed before the
2128 section's contents are written out. This should not happen,
2129 but this way if it does, we get a R_390_NONE reloc instead
2130 of garbage. */
2131 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2132 if (s->contents == NULL)
2133 return FALSE;
2134 }
2135
2136 if (htab->elf.dynamic_sections_created)
2137 {
2138 /* Add some entries to the .dynamic section. We fill in the
2139 values later, in elf_s390_finish_dynamic_sections, but we
2140 must add the entries now so that we get the correct size for
2141 the .dynamic section. The DT_DEBUG entry is filled in by the
2142 dynamic linker and used by the debugger. */
2143 #define add_dynamic_entry(TAG, VAL) \
2144 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2145
2146 if (info->executable)
2147 {
2148 if (!add_dynamic_entry (DT_DEBUG, 0))
2149 return FALSE;
2150 }
2151
2152 if (htab->splt->size != 0)
2153 {
2154 if (!add_dynamic_entry (DT_PLTGOT, 0)
2155 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2156 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2157 || !add_dynamic_entry (DT_JMPREL, 0))
2158 return FALSE;
2159 }
2160
2161 if (relocs)
2162 {
2163 if (!add_dynamic_entry (DT_RELA, 0)
2164 || !add_dynamic_entry (DT_RELASZ, 0)
2165 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2166 return FALSE;
2167
2168 /* If any dynamic relocs apply to a read-only section,
2169 then we need a DT_TEXTREL entry. */
2170 if ((info->flags & DF_TEXTREL) == 0)
2171 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2172 (PTR) info);
2173
2174 if ((info->flags & DF_TEXTREL) != 0)
2175 {
2176 if (!add_dynamic_entry (DT_TEXTREL, 0))
2177 return FALSE;
2178 }
2179 }
2180 }
2181 #undef add_dynamic_entry
2182
2183 return TRUE;
2184 }
2185
2186 /* Return the base VMA address which should be subtracted from real addresses
2187 when resolving @dtpoff relocation.
2188 This is PT_TLS segment p_vaddr. */
2189
2190 static bfd_vma
2191 dtpoff_base (info)
2192 struct bfd_link_info *info;
2193 {
2194 /* If tls_sec is NULL, we should have signalled an error already. */
2195 if (elf_hash_table (info)->tls_sec == NULL)
2196 return 0;
2197 return elf_hash_table (info)->tls_sec->vma;
2198 }
2199
2200 /* Return the relocation value for @tpoff relocation
2201 if STT_TLS virtual address is ADDRESS. */
2202
2203 static bfd_vma
2204 tpoff (info, address)
2205 struct bfd_link_info *info;
2206 bfd_vma address;
2207 {
2208 struct elf_link_hash_table *htab = elf_hash_table (info);
2209
2210 /* If tls_sec is NULL, we should have signalled an error already. */
2211 if (htab->tls_sec == NULL)
2212 return 0;
2213 return htab->tls_size + htab->tls_sec->vma - address;
2214 }
2215
2216 /* Complain if TLS instruction relocation is against an invalid
2217 instruction. */
2218
2219 static void
2220 invalid_tls_insn (input_bfd, input_section, rel)
2221 bfd *input_bfd;
2222 asection *input_section;
2223 Elf_Internal_Rela *rel;
2224 {
2225 reloc_howto_type *howto;
2226
2227 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2228 (*_bfd_error_handler)
2229 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2230 input_bfd,
2231 input_section,
2232 (long) rel->r_offset,
2233 howto->name);
2234 }
2235
2236 /* Relocate a 390 ELF section. */
2237
2238 static bfd_boolean
2239 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2240 contents, relocs, local_syms, local_sections)
2241 bfd *output_bfd;
2242 struct bfd_link_info *info;
2243 bfd *input_bfd;
2244 asection *input_section;
2245 bfd_byte *contents;
2246 Elf_Internal_Rela *relocs;
2247 Elf_Internal_Sym *local_syms;
2248 asection **local_sections;
2249 {
2250 struct elf_s390_link_hash_table *htab;
2251 Elf_Internal_Shdr *symtab_hdr;
2252 struct elf_link_hash_entry **sym_hashes;
2253 bfd_vma *local_got_offsets;
2254 Elf_Internal_Rela *rel;
2255 Elf_Internal_Rela *relend;
2256
2257 if (info->relocatable)
2258 return TRUE;
2259
2260 htab = elf_s390_hash_table (info);
2261 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2262 sym_hashes = elf_sym_hashes (input_bfd);
2263 local_got_offsets = elf_local_got_offsets (input_bfd);
2264
2265 rel = relocs;
2266 relend = relocs + input_section->reloc_count;
2267 for (; rel < relend; rel++)
2268 {
2269 unsigned int r_type;
2270 reloc_howto_type *howto;
2271 unsigned long r_symndx;
2272 struct elf_link_hash_entry *h;
2273 Elf_Internal_Sym *sym;
2274 asection *sec;
2275 bfd_vma off;
2276 bfd_vma relocation;
2277 bfd_boolean unresolved_reloc;
2278 bfd_reloc_status_type r;
2279 int tls_type;
2280
2281 r_type = ELF64_R_TYPE (rel->r_info);
2282 if (r_type == (int) R_390_GNU_VTINHERIT
2283 || r_type == (int) R_390_GNU_VTENTRY)
2284 continue;
2285 if (r_type >= (int) R_390_max)
2286 {
2287 bfd_set_error (bfd_error_bad_value);
2288 return FALSE;
2289 }
2290
2291 howto = elf_howto_table + r_type;
2292 r_symndx = ELF64_R_SYM (rel->r_info);
2293
2294 /* This is a final link. */
2295 h = NULL;
2296 sym = NULL;
2297 sec = NULL;
2298 unresolved_reloc = FALSE;
2299 if (r_symndx < symtab_hdr->sh_info)
2300 {
2301 sym = local_syms + r_symndx;
2302 sec = local_sections[r_symndx];
2303 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2304 }
2305 else
2306 {
2307 bfd_boolean warned ATTRIBUTE_UNUSED;
2308
2309 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2310 r_symndx, symtab_hdr, sym_hashes,
2311 h, sec, relocation,
2312 unresolved_reloc, warned);
2313 }
2314
2315 switch (r_type)
2316 {
2317 case R_390_GOTPLT12:
2318 case R_390_GOTPLT16:
2319 case R_390_GOTPLT20:
2320 case R_390_GOTPLT32:
2321 case R_390_GOTPLT64:
2322 case R_390_GOTPLTENT:
2323 /* There are three cases for a GOTPLT relocation. 1) The
2324 relocation is against the jump slot entry of a plt that
2325 will get emitted to the output file. 2) The relocation
2326 is against the jump slot of a plt entry that has been
2327 removed. elf_s390_adjust_gotplt has created a GOT entry
2328 as replacement. 3) The relocation is against a local symbol.
2329 Cases 2) and 3) are the same as the GOT relocation code
2330 so we just have to test for case 1 and fall through for
2331 the other two. */
2332 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2333 {
2334 bfd_vma plt_index;
2335
2336 /* Calc. index no.
2337 Current offset - size first entry / entry size. */
2338 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2339 PLT_ENTRY_SIZE;
2340
2341 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2342 addr & GOT addr. */
2343 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2344 unresolved_reloc = FALSE;
2345
2346 if (r_type == R_390_GOTPLTENT)
2347 relocation += htab->sgot->output_section->vma;
2348 break;
2349 }
2350 /* Fall through. */
2351
2352 case R_390_GOT12:
2353 case R_390_GOT16:
2354 case R_390_GOT20:
2355 case R_390_GOT32:
2356 case R_390_GOT64:
2357 case R_390_GOTENT:
2358 /* Relocation is to the entry for this symbol in the global
2359 offset table. */
2360 if (htab->sgot == NULL)
2361 abort ();
2362
2363 if (h != NULL)
2364 {
2365 bfd_boolean dyn;
2366
2367 off = h->got.offset;
2368 dyn = htab->elf.dynamic_sections_created;
2369 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2370 || (info->shared
2371 && (info->symbolic
2372 || h->dynindx == -1
2373 || h->forced_local)
2374 && h->def_regular)
2375 || (ELF_ST_VISIBILITY (h->other)
2376 && h->root.type == bfd_link_hash_undefweak))
2377 {
2378 /* This is actually a static link, or it is a
2379 -Bsymbolic link and the symbol is defined
2380 locally, or the symbol was forced to be local
2381 because of a version file. We must initialize
2382 this entry in the global offset table. Since the
2383 offset must always be a multiple of 2, we use the
2384 least significant bit to record whether we have
2385 initialized it already.
2386
2387 When doing a dynamic link, we create a .rel.got
2388 relocation entry to initialize the value. This
2389 is done in the finish_dynamic_symbol routine. */
2390 if ((off & 1) != 0)
2391 off &= ~1;
2392 else
2393 {
2394 bfd_put_64 (output_bfd, relocation,
2395 htab->sgot->contents + off);
2396 h->got.offset |= 1;
2397 }
2398 }
2399 else
2400 unresolved_reloc = FALSE;
2401 }
2402 else
2403 {
2404 if (local_got_offsets == NULL)
2405 abort ();
2406
2407 off = local_got_offsets[r_symndx];
2408
2409 /* The offset must always be a multiple of 8. We use
2410 the least significant bit to record whether we have
2411 already generated the necessary reloc. */
2412 if ((off & 1) != 0)
2413 off &= ~1;
2414 else
2415 {
2416 bfd_put_64 (output_bfd, relocation,
2417 htab->sgot->contents + off);
2418
2419 if (info->shared)
2420 {
2421 asection *s;
2422 Elf_Internal_Rela outrel;
2423 bfd_byte *loc;
2424
2425 s = htab->srelgot;
2426 if (s == NULL)
2427 abort ();
2428
2429 outrel.r_offset = (htab->sgot->output_section->vma
2430 + htab->sgot->output_offset
2431 + off);
2432 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2433 outrel.r_addend = relocation;
2434 loc = s->contents;
2435 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2436 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2437 }
2438
2439 local_got_offsets[r_symndx] |= 1;
2440 }
2441 }
2442
2443 if (off >= (bfd_vma) -2)
2444 abort ();
2445
2446 relocation = htab->sgot->output_offset + off;
2447
2448 /* For @GOTENT the relocation is against the offset between
2449 the instruction and the symbols entry in the GOT and not
2450 between the start of the GOT and the symbols entry. We
2451 add the vma of the GOT to get the correct value. */
2452 if ( r_type == R_390_GOTENT
2453 || r_type == R_390_GOTPLTENT)
2454 relocation += htab->sgot->output_section->vma;
2455
2456 break;
2457
2458 case R_390_GOTOFF16:
2459 case R_390_GOTOFF32:
2460 case R_390_GOTOFF64:
2461 /* Relocation is relative to the start of the global offset
2462 table. */
2463
2464 /* Note that sgot->output_offset is not involved in this
2465 calculation. We always want the start of .got. If we
2466 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2467 permitted by the ABI, we might have to change this
2468 calculation. */
2469 relocation -= htab->sgot->output_section->vma;
2470 break;
2471
2472 case R_390_GOTPC:
2473 case R_390_GOTPCDBL:
2474 /* Use global offset table as symbol value. */
2475 relocation = htab->sgot->output_section->vma;
2476 unresolved_reloc = FALSE;
2477 break;
2478
2479 case R_390_PLT16DBL:
2480 case R_390_PLT32:
2481 case R_390_PLT32DBL:
2482 case R_390_PLT64:
2483 /* Relocation is to the entry for this symbol in the
2484 procedure linkage table. */
2485
2486 /* Resolve a PLT32 reloc against a local symbol directly,
2487 without using the procedure linkage table. */
2488 if (h == NULL)
2489 break;
2490
2491 if (h->plt.offset == (bfd_vma) -1
2492 || htab->splt == NULL)
2493 {
2494 /* We didn't make a PLT entry for this symbol. This
2495 happens when statically linking PIC code, or when
2496 using -Bsymbolic. */
2497 break;
2498 }
2499
2500 relocation = (htab->splt->output_section->vma
2501 + htab->splt->output_offset
2502 + h->plt.offset);
2503 unresolved_reloc = FALSE;
2504 break;
2505
2506 case R_390_PLTOFF16:
2507 case R_390_PLTOFF32:
2508 case R_390_PLTOFF64:
2509 /* Relocation is to the entry for this symbol in the
2510 procedure linkage table relative to the start of the GOT. */
2511
2512 /* For local symbols or if we didn't make a PLT entry for
2513 this symbol resolve the symbol directly. */
2514 if ( h == NULL
2515 || h->plt.offset == (bfd_vma) -1
2516 || htab->splt == NULL)
2517 {
2518 relocation -= htab->sgot->output_section->vma;
2519 break;
2520 }
2521
2522 relocation = (htab->splt->output_section->vma
2523 + htab->splt->output_offset
2524 + h->plt.offset
2525 - htab->sgot->output_section->vma);
2526 unresolved_reloc = FALSE;
2527 break;
2528
2529 case R_390_8:
2530 case R_390_16:
2531 case R_390_32:
2532 case R_390_64:
2533 case R_390_PC16:
2534 case R_390_PC16DBL:
2535 case R_390_PC32:
2536 case R_390_PC32DBL:
2537 case R_390_PC64:
2538 /* r_symndx will be zero only for relocs against symbols
2539 from removed linkonce sections, or sections discarded by
2540 a linker script. */
2541 if (r_symndx == 0
2542 || (input_section->flags & SEC_ALLOC) == 0)
2543 break;
2544
2545 if ((info->shared
2546 && (h == NULL
2547 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2548 || h->root.type != bfd_link_hash_undefweak)
2549 && ((r_type != R_390_PC16
2550 && r_type != R_390_PC16DBL
2551 && r_type != R_390_PC32
2552 && r_type != R_390_PC32DBL
2553 && r_type != R_390_PC64)
2554 || (h != NULL
2555 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2556 || (ELIMINATE_COPY_RELOCS
2557 && !info->shared
2558 && h != NULL
2559 && h->dynindx != -1
2560 && !h->non_got_ref
2561 && ((h->def_dynamic
2562 && !h->def_regular)
2563 || h->root.type == bfd_link_hash_undefweak
2564 || h->root.type == bfd_link_hash_undefined)))
2565 {
2566 Elf_Internal_Rela outrel;
2567 bfd_boolean skip, relocate;
2568 asection *sreloc;
2569 bfd_byte *loc;
2570
2571 /* When generating a shared object, these relocations
2572 are copied into the output file to be resolved at run
2573 time. */
2574 skip = FALSE;
2575 relocate = FALSE;
2576
2577 outrel.r_offset =
2578 _bfd_elf_section_offset (output_bfd, info, input_section,
2579 rel->r_offset);
2580 if (outrel.r_offset == (bfd_vma) -1)
2581 skip = TRUE;
2582 else if (outrel.r_offset == (bfd_vma) -2)
2583 skip = TRUE, relocate = TRUE;
2584
2585 outrel.r_offset += (input_section->output_section->vma
2586 + input_section->output_offset);
2587
2588 if (skip)
2589 memset (&outrel, 0, sizeof outrel);
2590 else if (h != NULL
2591 && h->dynindx != -1
2592 && (r_type == R_390_PC16
2593 || r_type == R_390_PC16DBL
2594 || r_type == R_390_PC32
2595 || r_type == R_390_PC32DBL
2596 || r_type == R_390_PC64
2597 || !info->shared
2598 || !info->symbolic
2599 || !h->def_regular))
2600 {
2601 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2602 outrel.r_addend = rel->r_addend;
2603 }
2604 else
2605 {
2606 /* This symbol is local, or marked to become local. */
2607 outrel.r_addend = relocation + rel->r_addend;
2608 if (r_type == R_390_64)
2609 {
2610 relocate = TRUE;
2611 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2612 }
2613 else
2614 {
2615 long sindx;
2616
2617 if (bfd_is_abs_section (sec))
2618 sindx = 0;
2619 else if (sec == NULL || sec->owner == NULL)
2620 {
2621 bfd_set_error(bfd_error_bad_value);
2622 return FALSE;
2623 }
2624 else
2625 {
2626 asection *osec;
2627
2628 osec = sec->output_section;
2629 sindx = elf_section_data (osec)->dynindx;
2630 BFD_ASSERT (sindx > 0);
2631
2632 /* We are turning this relocation into one
2633 against a section symbol, so subtract out
2634 the output section's address but not the
2635 offset of the input section in the output
2636 section. */
2637
2638 outrel.r_addend -= osec->vma;
2639 }
2640 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2641 }
2642 }
2643
2644 sreloc = elf_section_data (input_section)->sreloc;
2645 if (sreloc == NULL)
2646 abort ();
2647
2648 loc = sreloc->contents;
2649 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2650 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2651
2652 /* If this reloc is against an external symbol, we do
2653 not want to fiddle with the addend. Otherwise, we
2654 need to include the symbol value so that it becomes
2655 an addend for the dynamic reloc. */
2656 if (! relocate)
2657 continue;
2658 }
2659
2660 break;
2661
2662 /* Relocations for tls literal pool entries. */
2663 case R_390_TLS_IE64:
2664 if (info->shared)
2665 {
2666 Elf_Internal_Rela outrel;
2667 asection *sreloc;
2668 bfd_byte *loc;
2669
2670 outrel.r_offset = rel->r_offset
2671 + input_section->output_section->vma
2672 + input_section->output_offset;
2673 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2674 sreloc = elf_section_data (input_section)->sreloc;
2675 if (sreloc == NULL)
2676 abort ();
2677 loc = sreloc->contents;
2678 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2679 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2680 }
2681 /* Fall through. */
2682
2683 case R_390_TLS_GD64:
2684 case R_390_TLS_GOTIE64:
2685 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2686 tls_type = GOT_UNKNOWN;
2687 if (h == NULL && local_got_offsets)
2688 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2689 else if (h != NULL)
2690 {
2691 tls_type = elf_s390_hash_entry(h)->tls_type;
2692 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2693 r_type = R_390_TLS_LE64;
2694 }
2695 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2696 r_type = R_390_TLS_IE64;
2697
2698 if (r_type == R_390_TLS_LE64)
2699 {
2700 /* This relocation gets optimized away by the local exec
2701 access optimization. */
2702 BFD_ASSERT (! unresolved_reloc);
2703 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2704 contents + rel->r_offset);
2705 continue;
2706 }
2707
2708 if (htab->sgot == NULL)
2709 abort ();
2710
2711 if (h != NULL)
2712 off = h->got.offset;
2713 else
2714 {
2715 if (local_got_offsets == NULL)
2716 abort ();
2717
2718 off = local_got_offsets[r_symndx];
2719 }
2720
2721 emit_tls_relocs:
2722
2723 if ((off & 1) != 0)
2724 off &= ~1;
2725 else
2726 {
2727 Elf_Internal_Rela outrel;
2728 bfd_byte *loc;
2729 int dr_type, indx;
2730
2731 if (htab->srelgot == NULL)
2732 abort ();
2733
2734 outrel.r_offset = (htab->sgot->output_section->vma
2735 + htab->sgot->output_offset + off);
2736
2737 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2738 if (r_type == R_390_TLS_GD64)
2739 dr_type = R_390_TLS_DTPMOD;
2740 else
2741 dr_type = R_390_TLS_TPOFF;
2742 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2743 outrel.r_addend = relocation - dtpoff_base (info);
2744 else
2745 outrel.r_addend = 0;
2746 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2747 loc = htab->srelgot->contents;
2748 loc += htab->srelgot->reloc_count++
2749 * sizeof (Elf64_External_Rela);
2750 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2751
2752 if (r_type == R_390_TLS_GD64)
2753 {
2754 if (indx == 0)
2755 {
2756 BFD_ASSERT (! unresolved_reloc);
2757 bfd_put_64 (output_bfd,
2758 relocation - dtpoff_base (info),
2759 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2760 }
2761 else
2762 {
2763 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2764 outrel.r_offset += GOT_ENTRY_SIZE;
2765 outrel.r_addend = 0;
2766 htab->srelgot->reloc_count++;
2767 loc += sizeof (Elf64_External_Rela);
2768 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2769 }
2770 }
2771
2772 if (h != NULL)
2773 h->got.offset |= 1;
2774 else
2775 local_got_offsets[r_symndx] |= 1;
2776 }
2777
2778 if (off >= (bfd_vma) -2)
2779 abort ();
2780 if (r_type == ELF64_R_TYPE (rel->r_info))
2781 {
2782 relocation = htab->sgot->output_offset + off;
2783 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2784 relocation += htab->sgot->output_section->vma;
2785 unresolved_reloc = FALSE;
2786 }
2787 else
2788 {
2789 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2790 contents + rel->r_offset);
2791 continue;
2792 }
2793 break;
2794
2795 case R_390_TLS_GOTIE12:
2796 case R_390_TLS_GOTIE20:
2797 case R_390_TLS_IEENT:
2798 if (h == NULL)
2799 {
2800 if (local_got_offsets == NULL)
2801 abort();
2802 off = local_got_offsets[r_symndx];
2803 if (info->shared)
2804 goto emit_tls_relocs;
2805 }
2806 else
2807 {
2808 off = h->got.offset;
2809 tls_type = elf_s390_hash_entry(h)->tls_type;
2810 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2811 goto emit_tls_relocs;
2812 }
2813
2814 if (htab->sgot == NULL)
2815 abort ();
2816
2817 BFD_ASSERT (! unresolved_reloc);
2818 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2819 htab->sgot->contents + off);
2820 relocation = htab->sgot->output_offset + off;
2821 if (r_type == R_390_TLS_IEENT)
2822 relocation += htab->sgot->output_section->vma;
2823 unresolved_reloc = FALSE;
2824 break;
2825
2826 case R_390_TLS_LDM64:
2827 if (! info->shared)
2828 /* The literal pool entry this relocation refers to gets ignored
2829 by the optimized code of the local exec model. Do nothing
2830 and the value will turn out zero. */
2831 continue;
2832
2833 if (htab->sgot == NULL)
2834 abort ();
2835
2836 off = htab->tls_ldm_got.offset;
2837 if (off & 1)
2838 off &= ~1;
2839 else
2840 {
2841 Elf_Internal_Rela outrel;
2842 bfd_byte *loc;
2843
2844 if (htab->srelgot == NULL)
2845 abort ();
2846
2847 outrel.r_offset = (htab->sgot->output_section->vma
2848 + htab->sgot->output_offset + off);
2849
2850 bfd_put_64 (output_bfd, 0,
2851 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2852 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2853 outrel.r_addend = 0;
2854 loc = htab->srelgot->contents;
2855 loc += htab->srelgot->reloc_count++
2856 * sizeof (Elf64_External_Rela);
2857 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2858 htab->tls_ldm_got.offset |= 1;
2859 }
2860 relocation = htab->sgot->output_offset + off;
2861 unresolved_reloc = FALSE;
2862 break;
2863
2864 case R_390_TLS_LE64:
2865 if (info->shared)
2866 {
2867 /* Linking a shared library with non-fpic code requires
2868 a R_390_TLS_TPOFF relocation. */
2869 Elf_Internal_Rela outrel;
2870 asection *sreloc;
2871 bfd_byte *loc;
2872 int indx;
2873
2874 outrel.r_offset = rel->r_offset
2875 + input_section->output_section->vma
2876 + input_section->output_offset;
2877 if (h != NULL && h->dynindx != -1)
2878 indx = h->dynindx;
2879 else
2880 indx = 0;
2881 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2882 if (indx == 0)
2883 outrel.r_addend = relocation - dtpoff_base (info);
2884 else
2885 outrel.r_addend = 0;
2886 sreloc = elf_section_data (input_section)->sreloc;
2887 if (sreloc == NULL)
2888 abort ();
2889 loc = sreloc->contents;
2890 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2891 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2892 }
2893 else
2894 {
2895 BFD_ASSERT (! unresolved_reloc);
2896 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2897 contents + rel->r_offset);
2898 }
2899 continue;
2900
2901 case R_390_TLS_LDO64:
2902 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2903 relocation -= dtpoff_base (info);
2904 else
2905 /* When converting LDO to LE, we must negate. */
2906 relocation = -tpoff (info, relocation);
2907 break;
2908
2909 /* Relocations for tls instructions. */
2910 case R_390_TLS_LOAD:
2911 case R_390_TLS_GDCALL:
2912 case R_390_TLS_LDCALL:
2913 tls_type = GOT_UNKNOWN;
2914 if (h == NULL && local_got_offsets)
2915 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2916 else if (h != NULL)
2917 tls_type = elf_s390_hash_entry(h)->tls_type;
2918
2919 if (tls_type == GOT_TLS_GD)
2920 continue;
2921
2922 if (r_type == R_390_TLS_LOAD)
2923 {
2924 if (!info->shared && (h == NULL || h->dynindx == -1))
2925 {
2926 /* IE->LE transition. Four valid cases:
2927 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2928 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2929 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2930 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2931 unsigned int insn0, insn1, ry;
2932
2933 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2934 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2935 if (insn1 != 0x0004)
2936 invalid_tls_insn (input_bfd, input_section, rel);
2937 ry = 0;
2938 if ((insn0 & 0xff00f000) == 0xe3000000)
2939 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2940 ry = (insn0 & 0x000f0000);
2941 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2942 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2943 ry = (insn0 & 0x0000f000) << 4;
2944 else if ((insn0 & 0xff00f000) == 0xe300c000)
2945 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2946 ry = (insn0 & 0x000f0000);
2947 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2948 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2949 ry = (insn0 & 0x0000f000) << 4;
2950 else
2951 invalid_tls_insn (input_bfd, input_section, rel);
2952 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2953 insn1 = 0x000d;
2954 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2955 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2956 }
2957 }
2958 else if (r_type == R_390_TLS_GDCALL)
2959 {
2960 unsigned int insn0, insn1;
2961
2962 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2963 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2964 if ((insn0 & 0xffff0000) != 0xc0e50000)
2965 invalid_tls_insn (input_bfd, input_section, rel);
2966 if (!info->shared && (h == NULL || h->dynindx == -1))
2967 {
2968 /* GD->LE transition.
2969 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2970 insn0 = 0xc0040000;
2971 insn1 = 0x0000;
2972 }
2973 else
2974 {
2975 /* GD->IE transition.
2976 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2977 insn0 = 0xe322c000;
2978 insn1 = 0x0004;
2979 }
2980 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2981 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2982 }
2983 else if (r_type == R_390_TLS_LDCALL)
2984 {
2985 if (!info->shared)
2986 {
2987 unsigned int insn0, insn1;
2988
2989 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2990 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2991 if ((insn0 & 0xffff0000) != 0xc0e50000)
2992 invalid_tls_insn (input_bfd, input_section, rel);
2993 /* LD->LE transition.
2994 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2995 insn0 = 0xc0040000;
2996 insn1 = 0x0000;
2997 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2998 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2999 }
3000 }
3001 continue;
3002
3003 default:
3004 break;
3005 }
3006
3007 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3008 because such sections are not SEC_ALLOC and thus ld.so will
3009 not process them. */
3010 if (unresolved_reloc
3011 && !((input_section->flags & SEC_DEBUGGING) != 0
3012 && h->def_dynamic))
3013 (*_bfd_error_handler)
3014 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3015 input_bfd,
3016 input_section,
3017 (long) rel->r_offset,
3018 howto->name,
3019 h->root.root.string);
3020
3021 if (r_type == R_390_20
3022 || r_type == R_390_GOT20
3023 || r_type == R_390_GOTPLT20
3024 || r_type == R_390_TLS_GOTIE20)
3025 {
3026 relocation += rel->r_addend;
3027 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3028 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3029 contents, rel->r_offset,
3030 relocation, 0);
3031 }
3032 else
3033 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3034 contents, rel->r_offset,
3035 relocation, rel->r_addend);
3036
3037 if (r != bfd_reloc_ok)
3038 {
3039 const char *name;
3040
3041 if (h != NULL)
3042 name = h->root.root.string;
3043 else
3044 {
3045 name = bfd_elf_string_from_elf_section (input_bfd,
3046 symtab_hdr->sh_link,
3047 sym->st_name);
3048 if (name == NULL)
3049 return FALSE;
3050 if (*name == '\0')
3051 name = bfd_section_name (input_bfd, sec);
3052 }
3053
3054 if (r == bfd_reloc_overflow)
3055 {
3056
3057 if (! ((*info->callbacks->reloc_overflow)
3058 (info, (h ? &h->root : NULL), name, howto->name,
3059 (bfd_vma) 0, input_bfd, input_section,
3060 rel->r_offset)))
3061 return FALSE;
3062 }
3063 else
3064 {
3065 (*_bfd_error_handler)
3066 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3067 input_bfd, input_section,
3068 (long) rel->r_offset, name, (int) r);
3069 return FALSE;
3070 }
3071 }
3072 }
3073
3074 return TRUE;
3075 }
3076
3077 /* Finish up dynamic symbol handling. We set the contents of various
3078 dynamic sections here. */
3079
3080 static bfd_boolean
3081 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3082 bfd *output_bfd;
3083 struct bfd_link_info *info;
3084 struct elf_link_hash_entry *h;
3085 Elf_Internal_Sym *sym;
3086 {
3087 struct elf_s390_link_hash_table *htab;
3088
3089 htab = elf_s390_hash_table (info);
3090
3091 if (h->plt.offset != (bfd_vma) -1)
3092 {
3093 bfd_vma plt_index;
3094 bfd_vma got_offset;
3095 Elf_Internal_Rela rela;
3096 bfd_byte *loc;
3097
3098 /* This symbol has an entry in the procedure linkage table. Set
3099 it up. */
3100
3101 if (h->dynindx == -1
3102 || htab->splt == NULL
3103 || htab->sgotplt == NULL
3104 || htab->srelplt == NULL)
3105 abort ();
3106
3107 /* Calc. index no.
3108 Current offset - size first entry / entry size. */
3109 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3110
3111 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3112 addr & GOT addr. */
3113 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3114
3115 /* Fill in the blueprint of a PLT. */
3116 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3117 htab->splt->contents + h->plt.offset);
3118 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3119 htab->splt->contents + h->plt.offset + 4);
3120 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3121 htab->splt->contents + h->plt.offset + 8);
3122 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3123 htab->splt->contents + h->plt.offset + 12);
3124 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3125 htab->splt->contents + h->plt.offset + 16);
3126 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3127 htab->splt->contents + h->plt.offset + 20);
3128 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3129 htab->splt->contents + h->plt.offset + 24);
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3131 htab->splt->contents + h->plt.offset + 28);
3132 /* Fixup the relative address to the GOT entry */
3133 bfd_put_32 (output_bfd,
3134 (htab->sgotplt->output_section->vma +
3135 htab->sgotplt->output_offset + got_offset
3136 - (htab->splt->output_section->vma + h->plt.offset))/2,
3137 htab->splt->contents + h->plt.offset + 2);
3138 /* Fixup the relative branch to PLT 0 */
3139 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3140 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3141 htab->splt->contents + h->plt.offset + 24);
3142 /* Fixup offset into symbol table */
3143 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3144 htab->splt->contents + h->plt.offset + 28);
3145
3146 /* Fill in the entry in the global offset table.
3147 Points to instruction after GOT offset. */
3148 bfd_put_64 (output_bfd,
3149 (htab->splt->output_section->vma
3150 + htab->splt->output_offset
3151 + h->plt.offset
3152 + 14),
3153 htab->sgotplt->contents + got_offset);
3154
3155 /* Fill in the entry in the .rela.plt section. */
3156 rela.r_offset = (htab->sgotplt->output_section->vma
3157 + htab->sgotplt->output_offset
3158 + got_offset);
3159 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3160 rela.r_addend = 0;
3161 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3162 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3163
3164 if (!h->def_regular)
3165 {
3166 /* Mark the symbol as undefined, rather than as defined in
3167 the .plt section. Leave the value alone. This is a clue
3168 for the dynamic linker, to make function pointer
3169 comparisons work between an application and shared
3170 library. */
3171 sym->st_shndx = SHN_UNDEF;
3172 }
3173 }
3174
3175 if (h->got.offset != (bfd_vma) -1
3176 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3177 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3178 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3179 {
3180 Elf_Internal_Rela rela;
3181 bfd_byte *loc;
3182
3183 /* This symbol has an entry in the global offset table. Set it
3184 up. */
3185 if (htab->sgot == NULL || htab->srelgot == NULL)
3186 abort ();
3187
3188 rela.r_offset = (htab->sgot->output_section->vma
3189 + htab->sgot->output_offset
3190 + (h->got.offset &~ (bfd_vma) 1));
3191
3192 /* If this is a static link, or it is a -Bsymbolic link and the
3193 symbol is defined locally or was forced to be local because
3194 of a version file, we just want to emit a RELATIVE reloc.
3195 The entry in the global offset table will already have been
3196 initialized in the relocate_section function. */
3197 if (info->shared
3198 && (info->symbolic
3199 || h->dynindx == -1
3200 || h->forced_local)
3201 && h->def_regular)
3202 {
3203 BFD_ASSERT((h->got.offset & 1) != 0);
3204 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3205 rela.r_addend = (h->root.u.def.value
3206 + h->root.u.def.section->output_section->vma
3207 + h->root.u.def.section->output_offset);
3208 }
3209 else
3210 {
3211 BFD_ASSERT((h->got.offset & 1) == 0);
3212 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3213 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3214 rela.r_addend = 0;
3215 }
3216
3217 loc = htab->srelgot->contents;
3218 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3219 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3220 }
3221
3222 if (h->needs_copy)
3223 {
3224 Elf_Internal_Rela rela;
3225 bfd_byte *loc;
3226
3227 /* This symbols needs a copy reloc. Set it up. */
3228
3229 if (h->dynindx == -1
3230 || (h->root.type != bfd_link_hash_defined
3231 && h->root.type != bfd_link_hash_defweak)
3232 || htab->srelbss == NULL)
3233 abort ();
3234
3235 rela.r_offset = (h->root.u.def.value
3236 + h->root.u.def.section->output_section->vma
3237 + h->root.u.def.section->output_offset);
3238 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3239 rela.r_addend = 0;
3240 loc = htab->srelbss->contents;
3241 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3242 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3243 }
3244
3245 /* Mark some specially defined symbols as absolute. */
3246 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3247 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3248 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3249 sym->st_shndx = SHN_ABS;
3250
3251 return TRUE;
3252 }
3253
3254 /* Used to decide how to sort relocs in an optimal manner for the
3255 dynamic linker, before writing them out. */
3256
3257 static enum elf_reloc_type_class
3258 elf_s390_reloc_type_class (rela)
3259 const Elf_Internal_Rela *rela;
3260 {
3261 switch ((int) ELF64_R_TYPE (rela->r_info))
3262 {
3263 case R_390_RELATIVE:
3264 return reloc_class_relative;
3265 case R_390_JMP_SLOT:
3266 return reloc_class_plt;
3267 case R_390_COPY:
3268 return reloc_class_copy;
3269 default:
3270 return reloc_class_normal;
3271 }
3272 }
3273
3274 /* Finish up the dynamic sections. */
3275
3276 static bfd_boolean
3277 elf_s390_finish_dynamic_sections (output_bfd, info)
3278 bfd *output_bfd;
3279 struct bfd_link_info *info;
3280 {
3281 struct elf_s390_link_hash_table *htab;
3282 bfd *dynobj;
3283 asection *sdyn;
3284
3285 htab = elf_s390_hash_table (info);
3286 dynobj = htab->elf.dynobj;
3287 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3288
3289 if (htab->elf.dynamic_sections_created)
3290 {
3291 Elf64_External_Dyn *dyncon, *dynconend;
3292
3293 if (sdyn == NULL || htab->sgot == NULL)
3294 abort ();
3295
3296 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3297 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3298 for (; dyncon < dynconend; dyncon++)
3299 {
3300 Elf_Internal_Dyn dyn;
3301 asection *s;
3302
3303 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3304
3305 switch (dyn.d_tag)
3306 {
3307 default:
3308 continue;
3309
3310 case DT_PLTGOT:
3311 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3312 break;
3313
3314 case DT_JMPREL:
3315 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3316 break;
3317
3318 case DT_PLTRELSZ:
3319 s = htab->srelplt->output_section;
3320 dyn.d_un.d_val = s->size;
3321 break;
3322
3323 case DT_RELASZ:
3324 /* The procedure linkage table relocs (DT_JMPREL) should
3325 not be included in the overall relocs (DT_RELA).
3326 Therefore, we override the DT_RELASZ entry here to
3327 make it not include the JMPREL relocs. Since the
3328 linker script arranges for .rela.plt to follow all
3329 other relocation sections, we don't have to worry
3330 about changing the DT_RELA entry. */
3331 s = htab->srelplt->output_section;
3332 dyn.d_un.d_val -= s->size;
3333 break;
3334 }
3335
3336 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3337 }
3338
3339 /* Fill in the special first entry in the procedure linkage table. */
3340 if (htab->splt && htab->splt->size > 0)
3341 {
3342 /* fill in blueprint for plt 0 entry */
3343 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3344 htab->splt->contents );
3345 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3346 htab->splt->contents +4 );
3347 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3348 htab->splt->contents +12 );
3349 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3350 htab->splt->contents +16 );
3351 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3352 htab->splt->contents +20 );
3353 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3354 htab->splt->contents + 24);
3355 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3356 htab->splt->contents + 28 );
3357 /* Fixup relative address to start of GOT */
3358 bfd_put_32 (output_bfd,
3359 (htab->sgotplt->output_section->vma +
3360 htab->sgotplt->output_offset
3361 - htab->splt->output_section->vma - 6)/2,
3362 htab->splt->contents + 8);
3363 }
3364 elf_section_data (htab->splt->output_section)
3365 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3366 }
3367
3368 if (htab->sgotplt)
3369 {
3370 /* Fill in the first three entries in the global offset table. */
3371 if (htab->sgotplt->size > 0)
3372 {
3373 bfd_put_64 (output_bfd,
3374 (sdyn == NULL ? (bfd_vma) 0
3375 : sdyn->output_section->vma + sdyn->output_offset),
3376 htab->sgotplt->contents);
3377 /* One entry for shared object struct ptr. */
3378 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3379 /* One entry for _dl_runtime_resolve. */
3380 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3381 }
3382
3383 elf_section_data (htab->sgot->output_section)
3384 ->this_hdr.sh_entsize = 8;
3385 }
3386 return TRUE;
3387 }
3388
3389 /* Return address for Ith PLT stub in section PLT, for relocation REL
3390 or (bfd_vma) -1 if it should not be included. */
3391
3392 static bfd_vma
3393 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3394 const arelent *rel ATTRIBUTE_UNUSED)
3395 {
3396 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3397 }
3398
3399
3400 /* Why was the hash table entry size definition changed from
3401 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3402 this is the only reason for the s390_elf64_size_info structure. */
3403
3404 const struct elf_size_info s390_elf64_size_info =
3405 {
3406 sizeof (Elf64_External_Ehdr),
3407 sizeof (Elf64_External_Phdr),
3408 sizeof (Elf64_External_Shdr),
3409 sizeof (Elf64_External_Rel),
3410 sizeof (Elf64_External_Rela),
3411 sizeof (Elf64_External_Sym),
3412 sizeof (Elf64_External_Dyn),
3413 sizeof (Elf_External_Note),
3414 8, /* hash-table entry size. */
3415 1, /* internal relocations per external relocations. */
3416 64, /* arch_size. */
3417 3, /* log_file_align. */
3418 ELFCLASS64, EV_CURRENT,
3419 bfd_elf64_write_out_phdrs,
3420 bfd_elf64_write_shdrs_and_ehdr,
3421 bfd_elf64_write_relocs,
3422 bfd_elf64_swap_symbol_in,
3423 bfd_elf64_swap_symbol_out,
3424 bfd_elf64_slurp_reloc_table,
3425 bfd_elf64_slurp_symbol_table,
3426 bfd_elf64_swap_dyn_in,
3427 bfd_elf64_swap_dyn_out,
3428 bfd_elf64_swap_reloc_in,
3429 bfd_elf64_swap_reloc_out,
3430 bfd_elf64_swap_reloca_in,
3431 bfd_elf64_swap_reloca_out
3432 };
3433
3434 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3435 #define TARGET_BIG_NAME "elf64-s390"
3436 #define ELF_ARCH bfd_arch_s390
3437 #define ELF_MACHINE_CODE EM_S390
3438 #define ELF_MACHINE_ALT1 EM_S390_OLD
3439 #define ELF_MAXPAGESIZE 0x1000
3440
3441 #define elf_backend_size_info s390_elf64_size_info
3442
3443 #define elf_backend_can_gc_sections 1
3444 #define elf_backend_can_refcount 1
3445 #define elf_backend_want_got_plt 1
3446 #define elf_backend_plt_readonly 1
3447 #define elf_backend_want_plt_sym 0
3448 #define elf_backend_got_header_size 24
3449 #define elf_backend_rela_normal 1
3450
3451 #define elf_info_to_howto elf_s390_info_to_howto
3452
3453 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3454 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3455 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3456
3457 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3458 #define elf_backend_check_relocs elf_s390_check_relocs
3459 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3460 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3461 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3462 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3463 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3464 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3465 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3466 #define elf_backend_relocate_section elf_s390_relocate_section
3467 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3468 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3469 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3470
3471 #define bfd_elf64_mkobject elf_s390_mkobject
3472 #define elf_backend_object_p elf_s390_object_p
3473
3474 #include "elf64-target.h"
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