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[binutils.git] / bfd / elf64-s390.c
blob2260248fe36393c0dd3631d30fd533c8ca22c8ca
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27
28 static reloc_howto_type *elf_s390_reloc_type_lookup
29 PARAMS ((bfd *, bfd_reloc_code_real_type));
30 static void elf_s390_info_to_howto
31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
32 static bfd_boolean elf_s390_is_local_label_name
33 PARAMS ((bfd *, const char *));
34 static struct bfd_hash_entry *link_hash_newfunc
35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
37 PARAMS ((bfd *));
38 static bfd_boolean create_got_section
39 PARAMS((bfd *, struct bfd_link_info *));
40 static bfd_boolean elf_s390_create_dynamic_sections
41 PARAMS((bfd *, struct bfd_link_info *));
42 static void elf_s390_copy_indirect_symbol
43 PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *,
44 struct elf_link_hash_entry *));
45 static bfd_boolean elf_s390_check_relocs
46 PARAMS ((bfd *, struct bfd_link_info *, asection *,
47 const Elf_Internal_Rela *));
48 static asection *elf_s390_gc_mark_hook
49 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
50 struct elf_link_hash_entry *, Elf_Internal_Sym *));
51 static bfd_boolean elf_s390_gc_sweep_hook
52 PARAMS ((bfd *, struct bfd_link_info *, asection *,
53 const Elf_Internal_Rela *));
54 struct elf_s390_link_hash_entry;
55 static void elf_s390_adjust_gotplt
56 PARAMS ((struct elf_s390_link_hash_entry *));
57 static bfd_boolean elf_s390_adjust_dynamic_symbol
58 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
59 static bfd_boolean allocate_dynrelocs
60 PARAMS ((struct elf_link_hash_entry *, PTR));
61 static bfd_boolean readonly_dynrelocs
62 PARAMS ((struct elf_link_hash_entry *, PTR));
63 static bfd_boolean elf_s390_size_dynamic_sections
64 PARAMS ((bfd *, struct bfd_link_info *));
65 static bfd_boolean elf_s390_relocate_section
66 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
67 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
68 static bfd_boolean elf_s390_finish_dynamic_symbol
69 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
70 Elf_Internal_Sym *));
71 static enum elf_reloc_type_class elf_s390_reloc_type_class
72 PARAMS ((const Elf_Internal_Rela *));
73 static bfd_boolean elf_s390_finish_dynamic_sections
74 PARAMS ((bfd *, struct bfd_link_info *));
75 static bfd_boolean elf_s390_mkobject
76 PARAMS ((bfd *));
77 static bfd_boolean elf_s390_object_p
78 PARAMS ((bfd *));
79 static int elf_s390_tls_transition
80 PARAMS ((struct bfd_link_info *, int, int));
81 static bfd_reloc_status_type s390_tls_reloc
82 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
83 static bfd_vma dtpoff_base
84 PARAMS ((struct bfd_link_info *));
85 static bfd_vma tpoff
86 PARAMS ((struct bfd_link_info *, bfd_vma));
87 static void invalid_tls_insn
88 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
89 static bfd_reloc_status_type s390_elf_ldisp_reloc
90 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
91
92 #include "elf/s390.h"
93
94 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
95 from smaller values. Start with zero, widen, *then* decrement. */
96 #define MINUS_ONE (((bfd_vma)0) - 1)
97
98 /* The relocation "howto" table. */
99 static reloc_howto_type elf_howto_table[] =
100 {
101 HOWTO (R_390_NONE, /* type */
102 0, /* rightshift */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
104 0, /* bitsize */
105 FALSE, /* pc_relative */
106 0, /* bitpos */
107 complain_overflow_dont, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_390_NONE", /* name */
110 FALSE, /* partial_inplace */
111 0, /* src_mask */
112 0, /* dst_mask */
113 FALSE), /* pcrel_offset */
114
115 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
117 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
118 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
119 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
121 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
123 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
125 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
127 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
131 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
133 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
135 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
137 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
139 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
141 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
143 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
145 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
147 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
149 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
151 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
153 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
155 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
157 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
159 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
161 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
163 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
165 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
167 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
169 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
171 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
172 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
173 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
175 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
177 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
179 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
181 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
183 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
184 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
185 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
186 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
187 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
188 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
189 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
190 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
191 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
192 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
193 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
194 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
196 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
197 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
198 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
199 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
200 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
201 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
202 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
203 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
204 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
205 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
206 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
207 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
208 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
209 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
210 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
212 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
213 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
214 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
215 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
216 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
217 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
218 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
219 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
220 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
221 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
222 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
223 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
224 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
225 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
226 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
227 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
228 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
229 };
230
231 /* GNU extension to record C++ vtable hierarchy. */
232 static reloc_howto_type elf64_s390_vtinherit_howto =
233 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
234 static reloc_howto_type elf64_s390_vtentry_howto =
235 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);
236
237 static reloc_howto_type *
238 elf_s390_reloc_type_lookup (abfd, code)
239 bfd *abfd ATTRIBUTE_UNUSED;
240 bfd_reloc_code_real_type code;
241 {
242 switch (code)
243 {
244 case BFD_RELOC_NONE:
245 return &elf_howto_table[(int) R_390_NONE];
246 case BFD_RELOC_8:
247 return &elf_howto_table[(int) R_390_8];
248 case BFD_RELOC_390_12:
249 return &elf_howto_table[(int) R_390_12];
250 case BFD_RELOC_16:
251 return &elf_howto_table[(int) R_390_16];
252 case BFD_RELOC_32:
253 return &elf_howto_table[(int) R_390_32];
254 case BFD_RELOC_CTOR:
255 return &elf_howto_table[(int) R_390_32];
256 case BFD_RELOC_32_PCREL:
257 return &elf_howto_table[(int) R_390_PC32];
258 case BFD_RELOC_390_GOT12:
259 return &elf_howto_table[(int) R_390_GOT12];
260 case BFD_RELOC_32_GOT_PCREL:
261 return &elf_howto_table[(int) R_390_GOT32];
262 case BFD_RELOC_390_PLT32:
263 return &elf_howto_table[(int) R_390_PLT32];
264 case BFD_RELOC_390_COPY:
265 return &elf_howto_table[(int) R_390_COPY];
266 case BFD_RELOC_390_GLOB_DAT:
267 return &elf_howto_table[(int) R_390_GLOB_DAT];
268 case BFD_RELOC_390_JMP_SLOT:
269 return &elf_howto_table[(int) R_390_JMP_SLOT];
270 case BFD_RELOC_390_RELATIVE:
271 return &elf_howto_table[(int) R_390_RELATIVE];
272 case BFD_RELOC_32_GOTOFF:
273 return &elf_howto_table[(int) R_390_GOTOFF32];
274 case BFD_RELOC_390_GOTPC:
275 return &elf_howto_table[(int) R_390_GOTPC];
276 case BFD_RELOC_390_GOT16:
277 return &elf_howto_table[(int) R_390_GOT16];
278 case BFD_RELOC_16_PCREL:
279 return &elf_howto_table[(int) R_390_PC16];
280 case BFD_RELOC_390_PC16DBL:
281 return &elf_howto_table[(int) R_390_PC16DBL];
282 case BFD_RELOC_390_PLT16DBL:
283 return &elf_howto_table[(int) R_390_PLT16DBL];
284 case BFD_RELOC_390_PC32DBL:
285 return &elf_howto_table[(int) R_390_PC32DBL];
286 case BFD_RELOC_390_PLT32DBL:
287 return &elf_howto_table[(int) R_390_PLT32DBL];
288 case BFD_RELOC_390_GOTPCDBL:
289 return &elf_howto_table[(int) R_390_GOTPCDBL];
290 case BFD_RELOC_64:
291 return &elf_howto_table[(int) R_390_64];
292 case BFD_RELOC_64_PCREL:
293 return &elf_howto_table[(int) R_390_PC64];
294 case BFD_RELOC_390_GOT64:
295 return &elf_howto_table[(int) R_390_GOT64];
296 case BFD_RELOC_390_PLT64:
297 return &elf_howto_table[(int) R_390_PLT64];
298 case BFD_RELOC_390_GOTENT:
299 return &elf_howto_table[(int) R_390_GOTENT];
300 case BFD_RELOC_16_GOTOFF:
301 return &elf_howto_table[(int) R_390_GOTOFF16];
302 case BFD_RELOC_390_GOTOFF64:
303 return &elf_howto_table[(int) R_390_GOTOFF64];
304 case BFD_RELOC_390_GOTPLT12:
305 return &elf_howto_table[(int) R_390_GOTPLT12];
306 case BFD_RELOC_390_GOTPLT16:
307 return &elf_howto_table[(int) R_390_GOTPLT16];
308 case BFD_RELOC_390_GOTPLT32:
309 return &elf_howto_table[(int) R_390_GOTPLT32];
310 case BFD_RELOC_390_GOTPLT64:
311 return &elf_howto_table[(int) R_390_GOTPLT64];
312 case BFD_RELOC_390_GOTPLTENT:
313 return &elf_howto_table[(int) R_390_GOTPLTENT];
314 case BFD_RELOC_390_PLTOFF16:
315 return &elf_howto_table[(int) R_390_PLTOFF16];
316 case BFD_RELOC_390_PLTOFF32:
317 return &elf_howto_table[(int) R_390_PLTOFF32];
318 case BFD_RELOC_390_PLTOFF64:
319 return &elf_howto_table[(int) R_390_PLTOFF64];
320 case BFD_RELOC_390_TLS_LOAD:
321 return &elf_howto_table[(int) R_390_TLS_LOAD];
322 case BFD_RELOC_390_TLS_GDCALL:
323 return &elf_howto_table[(int) R_390_TLS_GDCALL];
324 case BFD_RELOC_390_TLS_LDCALL:
325 return &elf_howto_table[(int) R_390_TLS_LDCALL];
326 case BFD_RELOC_390_TLS_GD64:
327 return &elf_howto_table[(int) R_390_TLS_GD64];
328 case BFD_RELOC_390_TLS_GOTIE12:
329 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
330 case BFD_RELOC_390_TLS_GOTIE64:
331 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
332 case BFD_RELOC_390_TLS_LDM64:
333 return &elf_howto_table[(int) R_390_TLS_LDM64];
334 case BFD_RELOC_390_TLS_IE64:
335 return &elf_howto_table[(int) R_390_TLS_IE64];
336 case BFD_RELOC_390_TLS_IEENT:
337 return &elf_howto_table[(int) R_390_TLS_IEENT];
338 case BFD_RELOC_390_TLS_LE64:
339 return &elf_howto_table[(int) R_390_TLS_LE64];
340 case BFD_RELOC_390_TLS_LDO64:
341 return &elf_howto_table[(int) R_390_TLS_LDO64];
342 case BFD_RELOC_390_TLS_DTPMOD:
343 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
344 case BFD_RELOC_390_TLS_DTPOFF:
345 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
346 case BFD_RELOC_390_TLS_TPOFF:
347 return &elf_howto_table[(int) R_390_TLS_TPOFF];
348 case BFD_RELOC_390_20:
349 return &elf_howto_table[(int) R_390_20];
350 case BFD_RELOC_390_GOT20:
351 return &elf_howto_table[(int) R_390_GOT20];
352 case BFD_RELOC_390_GOTPLT20:
353 return &elf_howto_table[(int) R_390_GOTPLT20];
354 case BFD_RELOC_390_TLS_GOTIE20:
355 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
356 case BFD_RELOC_VTABLE_INHERIT:
357 return &elf64_s390_vtinherit_howto;
358 case BFD_RELOC_VTABLE_ENTRY:
359 return &elf64_s390_vtentry_howto;
360 default:
361 break;
362 }
363 return 0;
364 }
365
366 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
367 and elf64-s390.c has its own copy. */
368
369 static void
370 elf_s390_info_to_howto (abfd, cache_ptr, dst)
371 bfd *abfd ATTRIBUTE_UNUSED;
372 arelent *cache_ptr;
373 Elf_Internal_Rela *dst;
374 {
375 switch (ELF64_R_TYPE(dst->r_info))
376 {
377 case R_390_GNU_VTINHERIT:
378 cache_ptr->howto = &elf64_s390_vtinherit_howto;
379 break;
380
381 case R_390_GNU_VTENTRY:
382 cache_ptr->howto = &elf64_s390_vtentry_howto;
383 break;
384
385 default:
386 BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
387 cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)];
388 }
389 }
390
391 /* A relocation function which doesn't do anything. */
392 static bfd_reloc_status_type
393 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
394 output_bfd, error_message)
395 bfd *abfd ATTRIBUTE_UNUSED;
396 arelent *reloc_entry;
397 asymbol *symbol ATTRIBUTE_UNUSED;
398 PTR data ATTRIBUTE_UNUSED;
399 asection *input_section;
400 bfd *output_bfd;
401 char **error_message ATTRIBUTE_UNUSED;
402 {
403 if (output_bfd)
404 reloc_entry->address += input_section->output_offset;
405 return bfd_reloc_ok;
406 }
407
408 /* Handle the large displacement relocs. */
409 static bfd_reloc_status_type
410 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
411 output_bfd, error_message)
412 bfd *abfd;
413 arelent *reloc_entry;
414 asymbol *symbol;
415 PTR data;
416 asection *input_section;
417 bfd *output_bfd;
418 char **error_message ATTRIBUTE_UNUSED;
419 {
420 reloc_howto_type *howto = reloc_entry->howto;
421 bfd_vma relocation;
422 bfd_vma insn;
423
424 if (output_bfd != (bfd *) NULL
425 && (symbol->flags & BSF_SECTION_SYM) == 0
426 && (! howto->partial_inplace
427 || reloc_entry->addend == 0))
428 {
429 reloc_entry->address += input_section->output_offset;
430 return bfd_reloc_ok;
431 }
432 if (output_bfd != NULL)
433 return bfd_reloc_continue;
434
435 if (reloc_entry->address > input_section->_cooked_size)
436 return bfd_reloc_outofrange;
437
438 relocation = (symbol->value
439 + symbol->section->output_section->vma
440 + symbol->section->output_offset);
441 relocation += reloc_entry->addend;
442 if (howto->pc_relative)
443 {
444 relocation -= (input_section->output_section->vma
445 + input_section->output_offset);
446 relocation -= reloc_entry->address;
447 }
448
449 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
450 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
451 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
452
453 if ((bfd_signed_vma) relocation < - 0x80000
454 || (bfd_signed_vma) relocation > 0x7ffff)
455 return bfd_reloc_overflow;
456 else
457 return bfd_reloc_ok;
458 }
459
460 static bfd_boolean
461 elf_s390_is_local_label_name (abfd, name)
462 bfd *abfd;
463 const char *name;
464 {
465 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
466 return TRUE;
467
468 return _bfd_elf_is_local_label_name (abfd, name);
469 }
470
471 /* Functions for the 390 ELF linker. */
472
473 /* The name of the dynamic interpreter. This is put in the .interp
474 section. */
475
476 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
477
478 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
479 copying dynamic variables from a shared lib into an app's dynbss
480 section, and instead use a dynamic relocation to point into the
481 shared lib. */
482 #define ELIMINATE_COPY_RELOCS 1
483
484 /* The size in bytes of the first entry in the procedure linkage table. */
485 #define PLT_FIRST_ENTRY_SIZE 32
486 /* The size in bytes of an entry in the procedure linkage table. */
487 #define PLT_ENTRY_SIZE 32
488
489 #define GOT_ENTRY_SIZE 8
490
491 /* The first three entries in a procedure linkage table are reserved,
492 and the initial contents are unimportant (we zero them out).
493 Subsequent entries look like this. See the SVR4 ABI 386
494 supplement to see how this works. */
495
496 /* For the s390, simple addr offset can only be 0 - 4096.
497 To use the full 16777216 TB address space, several instructions
498 are needed to load an address in a register and execute
499 a branch( or just saving the address)
500
501 Furthermore, only r 0 and 1 are free to use!!! */
502
503 /* The first 3 words in the GOT are then reserved.
504 Word 0 is the address of the dynamic table.
505 Word 1 is a pointer to a structure describing the object
506 Word 2 is used to point to the loader entry address.
507
508 The code for PLT entries looks like this:
509
510 The GOT holds the address in the PLT to be executed.
511 The loader then gets:
512 24(15) = Pointer to the structure describing the object.
513 28(15) = Offset in symbol table
514 The loader must then find the module where the function is
515 and insert the address in the GOT.
516
517 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
518 LG 1,0(1) # 6 bytes Load address from GOT in r1
519 BCR 15,1 # 2 bytes Jump to address
520 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
521 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
522 BRCL 15,-x # 6 bytes Jump to start of PLT
523 .long ? # 4 bytes offset into symbol table
524
525 Total = 32 bytes per PLT entry
526 Fixup at offset 2: relative address to GOT entry
527 Fixup at offset 22: relative branch to PLT0
528 Fixup at offset 28: 32 bit offset into symbol table
529
530 A 32 bit offset into the symbol table is enough. It allows for symbol
531 tables up to a size of 2 gigabyte. A single dynamic object (the main
532 program, any shared library) is limited to 4GB in size and I want to see
533 the program that manages to have a symbol table of more than 2 GB with a
534 total size of at max 4 GB. */
535
536 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
537 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
538 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
539 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
540 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
541 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
542 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
543 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
544
545 /* The first PLT entry pushes the offset into the symbol table
546 from R1 onto the stack at 8(15) and the loader object info
547 at 12(15), loads the loader address in R1 and jumps to it. */
548
549 /* The first entry in the PLT:
550
551 PLT0:
552 STG 1,56(15) # r1 contains the offset into the symbol table
553 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
554 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
555 LG 1,16(1) # get entry address of loader
556 BCR 15,1 # jump to loader
557
558 Fixup at offset 8: relative address to start of GOT. */
559
560 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
561 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
562 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
563 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
564 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
565 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
566 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
567 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
568
569 /* The s390 linker needs to keep track of the number of relocs that it
570 decides to copy as dynamic relocs in check_relocs for each symbol.
571 This is so that it can later discard them if they are found to be
572 unnecessary. We store the information in a field extending the
573 regular ELF linker hash table. */
574
575 struct elf_s390_dyn_relocs
576 {
577 struct elf_s390_dyn_relocs *next;
578
579 /* The input section of the reloc. */
580 asection *sec;
581
582 /* Total number of relocs copied for the input section. */
583 bfd_size_type count;
584
585 /* Number of pc-relative relocs copied for the input section. */
586 bfd_size_type pc_count;
587 };
588
589 /* s390 ELF linker hash entry. */
590
591 struct elf_s390_link_hash_entry
592 {
593 struct elf_link_hash_entry elf;
594
595 /* Track dynamic relocs copied for this symbol. */
596 struct elf_s390_dyn_relocs *dyn_relocs;
597
598 /* Number of GOTPLT references for a function. */
599 bfd_signed_vma gotplt_refcount;
600
601 #define GOT_UNKNOWN 0
602 #define GOT_NORMAL 1
603 #define GOT_TLS_GD 2
604 #define GOT_TLS_IE 3
605 #define GOT_TLS_IE_NLT 3
606 unsigned char tls_type;
607 };
608
609 #define elf_s390_hash_entry(ent) \
610 ((struct elf_s390_link_hash_entry *)(ent))
611
612 struct elf_s390_obj_tdata
613 {
614 struct elf_obj_tdata root;
615
616 /* tls_type for each local got entry. */
617 char *local_got_tls_type;
618 };
619
620 #define elf_s390_tdata(abfd) \
621 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
622
623 #define elf_s390_local_got_tls_type(abfd) \
624 (elf_s390_tdata (abfd)->local_got_tls_type)
625
626 static bfd_boolean
627 elf_s390_mkobject (abfd)
628 bfd *abfd;
629 {
630 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
631 abfd->tdata.any = bfd_zalloc (abfd, amt);
632 if (abfd->tdata.any == NULL)
633 return FALSE;
634 return TRUE;
635 }
636
637 static bfd_boolean
638 elf_s390_object_p (abfd)
639 bfd *abfd;
640 {
641 /* Set the right machine number for an s390 elf32 file. */
642 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
643 }
644
645 /* s390 ELF linker hash table. */
646
647 struct elf_s390_link_hash_table
648 {
649 struct elf_link_hash_table elf;
650
651 /* Short-cuts to get to dynamic linker sections. */
652 asection *sgot;
653 asection *sgotplt;
654 asection *srelgot;
655 asection *splt;
656 asection *srelplt;
657 asection *sdynbss;
658 asection *srelbss;
659
660 union {
661 bfd_signed_vma refcount;
662 bfd_vma offset;
663 } tls_ldm_got;
664
665 /* Small local sym to section mapping cache. */
666 struct sym_sec_cache sym_sec;
667 };
668
669 /* Get the s390 ELF linker hash table from a link_info structure. */
670
671 #define elf_s390_hash_table(p) \
672 ((struct elf_s390_link_hash_table *) ((p)->hash))
673
674 /* Create an entry in an s390 ELF linker hash table. */
675
676 static struct bfd_hash_entry *
677 link_hash_newfunc (entry, table, string)
678 struct bfd_hash_entry *entry;
679 struct bfd_hash_table *table;
680 const char *string;
681 {
682 /* Allocate the structure if it has not already been allocated by a
683 subclass. */
684 if (entry == NULL)
685 {
686 entry = bfd_hash_allocate (table,
687 sizeof (struct elf_s390_link_hash_entry));
688 if (entry == NULL)
689 return entry;
690 }
691
692 /* Call the allocation method of the superclass. */
693 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
694 if (entry != NULL)
695 {
696 struct elf_s390_link_hash_entry *eh;
697
698 eh = (struct elf_s390_link_hash_entry *) entry;
699 eh->dyn_relocs = NULL;
700 eh->gotplt_refcount = 0;
701 eh->tls_type = GOT_UNKNOWN;
702 }
703
704 return entry;
705 }
706
707 /* Create an s390 ELF linker hash table. */
708
709 static struct bfd_link_hash_table *
710 elf_s390_link_hash_table_create (abfd)
711 bfd *abfd;
712 {
713 struct elf_s390_link_hash_table *ret;
714 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
715
716 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
717 if (ret == NULL)
718 return NULL;
719
720 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
721 {
722 free (ret);
723 return NULL;
724 }
725
726 ret->sgot = NULL;
727 ret->sgotplt = NULL;
728 ret->srelgot = NULL;
729 ret->splt = NULL;
730 ret->srelplt = NULL;
731 ret->sdynbss = NULL;
732 ret->srelbss = NULL;
733 ret->tls_ldm_got.refcount = 0;
734 ret->sym_sec.abfd = NULL;
735
736 return &ret->elf.root;
737 }
738
739 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
740 shortcuts to them in our hash table. */
741
742 static bfd_boolean
743 create_got_section (dynobj, info)
744 bfd *dynobj;
745 struct bfd_link_info *info;
746 {
747 struct elf_s390_link_hash_table *htab;
748
749 if (! _bfd_elf_create_got_section (dynobj, info))
750 return FALSE;
751
752 htab = elf_s390_hash_table (info);
753 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
754 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
755 if (!htab->sgot || !htab->sgotplt)
756 abort ();
757
758 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
759 if (htab->srelgot == NULL
760 || ! bfd_set_section_flags (dynobj, htab->srelgot,
761 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
762 | SEC_IN_MEMORY | SEC_LINKER_CREATED
763 | SEC_READONLY))
764 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
765 return FALSE;
766 return TRUE;
767 }
768
769 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
770 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
771 hash table. */
772
773 static bfd_boolean
774 elf_s390_create_dynamic_sections (dynobj, info)
775 bfd *dynobj;
776 struct bfd_link_info *info;
777 {
778 struct elf_s390_link_hash_table *htab;
779
780 htab = elf_s390_hash_table (info);
781 if (!htab->sgot && !create_got_section (dynobj, info))
782 return FALSE;
783
784 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
785 return FALSE;
786
787 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
788 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
789 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
790 if (!info->shared)
791 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
792
793 if (!htab->splt || !htab->srelplt || !htab->sdynbss
794 || (!info->shared && !htab->srelbss))
795 abort ();
796
797 return TRUE;
798 }
799
800 /* Copy the extra info we tack onto an elf_link_hash_entry. */
801
802 static void
803 elf_s390_copy_indirect_symbol (bed, dir, ind)
804 const struct elf_backend_data *bed;
805 struct elf_link_hash_entry *dir, *ind;
806 {
807 struct elf_s390_link_hash_entry *edir, *eind;
808
809 edir = (struct elf_s390_link_hash_entry *) dir;
810 eind = (struct elf_s390_link_hash_entry *) ind;
811
812 if (eind->dyn_relocs != NULL)
813 {
814 if (edir->dyn_relocs != NULL)
815 {
816 struct elf_s390_dyn_relocs **pp;
817 struct elf_s390_dyn_relocs *p;
818
819 if (ind->root.type == bfd_link_hash_indirect)
820 abort ();
821
822 /* Add reloc counts against the weak sym to the strong sym
823 list. Merge any entries against the same section. */
824 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
825 {
826 struct elf_s390_dyn_relocs *q;
827
828 for (q = edir->dyn_relocs; q != NULL; q = q->next)
829 if (q->sec == p->sec)
830 {
831 q->pc_count += p->pc_count;
832 q->count += p->count;
833 *pp = p->next;
834 break;
835 }
836 if (q == NULL)
837 pp = &p->next;
838 }
839 *pp = edir->dyn_relocs;
840 }
841
842 edir->dyn_relocs = eind->dyn_relocs;
843 eind->dyn_relocs = NULL;
844 }
845
846 if (ind->root.type == bfd_link_hash_indirect
847 && dir->got.refcount <= 0)
848 {
849 edir->tls_type = eind->tls_type;
850 eind->tls_type = GOT_UNKNOWN;
851 }
852
853 if (ELIMINATE_COPY_RELOCS
854 && ind->root.type != bfd_link_hash_indirect
855 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
856 /* If called to transfer flags for a weakdef during processing
857 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
858 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
859 dir->elf_link_hash_flags |=
860 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
861 | ELF_LINK_HASH_REF_REGULAR
862 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
863 | ELF_LINK_HASH_NEEDS_PLT));
864 else
865 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
866 }
867
868 static int
869 elf_s390_tls_transition (info, r_type, is_local)
870 struct bfd_link_info *info;
871 int r_type;
872 int is_local;
873 {
874 if (info->shared)
875 return r_type;
876
877 switch (r_type)
878 {
879 case R_390_TLS_GD64:
880 case R_390_TLS_IE64:
881 if (is_local)
882 return R_390_TLS_LE64;
883 return R_390_TLS_IE64;
884 case R_390_TLS_GOTIE64:
885 if (is_local)
886 return R_390_TLS_LE64;
887 return R_390_TLS_GOTIE64;
888 case R_390_TLS_LDM64:
889 return R_390_TLS_LE64;
890 }
891
892 return r_type;
893 }
894
895 /* Look through the relocs for a section during the first phase, and
896 allocate space in the global offset table or procedure linkage
897 table. */
898
899 static bfd_boolean
900 elf_s390_check_relocs (abfd, info, sec, relocs)
901 bfd *abfd;
902 struct bfd_link_info *info;
903 asection *sec;
904 const Elf_Internal_Rela *relocs;
905 {
906 struct elf_s390_link_hash_table *htab;
907 Elf_Internal_Shdr *symtab_hdr;
908 struct elf_link_hash_entry **sym_hashes;
909 const Elf_Internal_Rela *rel;
910 const Elf_Internal_Rela *rel_end;
911 asection *sreloc;
912 bfd_signed_vma *local_got_refcounts;
913 int tls_type, old_tls_type;
914
915 if (info->relocatable)
916 return TRUE;
917
918 htab = elf_s390_hash_table (info);
919 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
920 sym_hashes = elf_sym_hashes (abfd);
921 local_got_refcounts = elf_local_got_refcounts (abfd);
922
923 sreloc = NULL;
924
925 rel_end = relocs + sec->reloc_count;
926 for (rel = relocs; rel < rel_end; rel++)
927 {
928 unsigned int r_type;
929 unsigned long r_symndx;
930 struct elf_link_hash_entry *h;
931
932 r_symndx = ELF64_R_SYM (rel->r_info);
933
934 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
935 {
936 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
937 bfd_archive_filename (abfd),
938 r_symndx);
939 return FALSE;
940 }
941
942 if (r_symndx < symtab_hdr->sh_info)
943 h = NULL;
944 else
945 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
946
947 /* Create got section and local_got_refcounts array if they
948 are needed. */
949 r_type = elf_s390_tls_transition (info,
950 ELF64_R_TYPE (rel->r_info),
951 h == NULL);
952 switch (r_type)
953 {
954 case R_390_GOT12:
955 case R_390_GOT16:
956 case R_390_GOT20:
957 case R_390_GOT32:
958 case R_390_GOT64:
959 case R_390_GOTENT:
960 case R_390_GOTPLT12:
961 case R_390_GOTPLT16:
962 case R_390_GOTPLT20:
963 case R_390_GOTPLT32:
964 case R_390_GOTPLT64:
965 case R_390_GOTPLTENT:
966 case R_390_TLS_GD64:
967 case R_390_TLS_GOTIE12:
968 case R_390_TLS_GOTIE20:
969 case R_390_TLS_GOTIE64:
970 case R_390_TLS_IEENT:
971 case R_390_TLS_IE64:
972 case R_390_TLS_LDM64:
973 if (h == NULL
974 && local_got_refcounts == NULL)
975 {
976 bfd_size_type size;
977
978 size = symtab_hdr->sh_info;
979 size *= (sizeof (bfd_signed_vma) + sizeof(char));
980 local_got_refcounts = ((bfd_signed_vma *)
981 bfd_zalloc (abfd, size));
982 if (local_got_refcounts == NULL)
983 return FALSE;
984 elf_local_got_refcounts (abfd) = local_got_refcounts;
985 elf_s390_local_got_tls_type (abfd)
986 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
987 }
988 /* Fall through. */
989 case R_390_GOTOFF16:
990 case R_390_GOTOFF32:
991 case R_390_GOTOFF64:
992 case R_390_GOTPC:
993 case R_390_GOTPCDBL:
994 if (htab->sgot == NULL)
995 {
996 if (htab->elf.dynobj == NULL)
997 htab->elf.dynobj = abfd;
998 if (!create_got_section (htab->elf.dynobj, info))
999 return FALSE;
1000 }
1001 }
1002
1003 switch (r_type)
1004 {
1005 case R_390_GOTOFF16:
1006 case R_390_GOTOFF32:
1007 case R_390_GOTOFF64:
1008 case R_390_GOTPC:
1009 case R_390_GOTPCDBL:
1010 /* Got is created, nothing to be done. */
1011 break;
1012
1013 case R_390_PLT16DBL:
1014 case R_390_PLT32:
1015 case R_390_PLT32DBL:
1016 case R_390_PLT64:
1017 case R_390_PLTOFF16:
1018 case R_390_PLTOFF32:
1019 case R_390_PLTOFF64:
1020 /* This symbol requires a procedure linkage table entry. We
1021 actually build the entry in adjust_dynamic_symbol,
1022 because this might be a case of linking PIC code which is
1023 never referenced by a dynamic object, in which case we
1024 don't need to generate a procedure linkage table entry
1025 after all. */
1026
1027 /* If this is a local symbol, we resolve it directly without
1028 creating a procedure linkage table entry. */
1029 if (h != NULL)
1030 {
1031 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1032 h->plt.refcount += 1;
1033 }
1034 break;
1035
1036 case R_390_GOTPLT12:
1037 case R_390_GOTPLT16:
1038 case R_390_GOTPLT20:
1039 case R_390_GOTPLT32:
1040 case R_390_GOTPLT64:
1041 case R_390_GOTPLTENT:
1042 /* This symbol requires either a procedure linkage table entry
1043 or an entry in the local got. We actually build the entry
1044 in adjust_dynamic_symbol because whether this is really a
1045 global reference can change and with it the fact if we have
1046 to create a plt entry or a local got entry. To be able to
1047 make a once global symbol a local one we have to keep track
1048 of the number of gotplt references that exist for this
1049 symbol. */
1050 if (h != NULL)
1051 {
1052 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1053 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1054 h->plt.refcount += 1;
1055 }
1056 else
1057 local_got_refcounts[r_symndx] += 1;
1058 break;
1059
1060 case R_390_TLS_LDM64:
1061 htab->tls_ldm_got.refcount += 1;
1062 break;
1063
1064 case R_390_TLS_IE64:
1065 case R_390_TLS_GOTIE12:
1066 case R_390_TLS_GOTIE20:
1067 case R_390_TLS_GOTIE64:
1068 case R_390_TLS_IEENT:
1069 if (info->shared)
1070 info->flags |= DF_STATIC_TLS;
1071 /* Fall through */
1072
1073 case R_390_GOT12:
1074 case R_390_GOT16:
1075 case R_390_GOT20:
1076 case R_390_GOT32:
1077 case R_390_GOT64:
1078 case R_390_GOTENT:
1079 case R_390_TLS_GD64:
1080 /* This symbol requires a global offset table entry. */
1081 switch (r_type)
1082 {
1083 default:
1084 case R_390_GOT12:
1085 case R_390_GOT16:
1086 case R_390_GOT20:
1087 case R_390_GOT32:
1088 case R_390_GOTENT:
1089 tls_type = GOT_NORMAL;
1090 break;
1091 case R_390_TLS_GD64:
1092 tls_type = GOT_TLS_GD;
1093 break;
1094 case R_390_TLS_IE64:
1095 case R_390_TLS_GOTIE64:
1096 tls_type = GOT_TLS_IE;
1097 break;
1098 case R_390_TLS_GOTIE12:
1099 case R_390_TLS_GOTIE20:
1100 case R_390_TLS_IEENT:
1101 tls_type = GOT_TLS_IE_NLT;
1102 break;
1103 }
1104
1105 if (h != NULL)
1106 {
1107 h->got.refcount += 1;
1108 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1109 }
1110 else
1111 {
1112 local_got_refcounts[r_symndx] += 1;
1113 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1114 }
1115 /* If a TLS symbol is accessed using IE at least once,
1116 there is no point to use dynamic model for it. */
1117 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1118 {
1119 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1120 {
1121 (*_bfd_error_handler)
1122 (_("%s: `%s' accessed both as normal and thread local symbol"),
1123 bfd_archive_filename (abfd), h->root.root.string);
1124 return FALSE;
1125 }
1126 if (old_tls_type > tls_type)
1127 tls_type = old_tls_type;
1128 }
1129
1130 if (old_tls_type != tls_type)
1131 {
1132 if (h != NULL)
1133 elf_s390_hash_entry (h)->tls_type = tls_type;
1134 else
1135 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1136 }
1137
1138 if (r_type != R_390_TLS_IE64)
1139 break;
1140 /* Fall through */
1141
1142 case R_390_TLS_LE64:
1143 if (!info->shared)
1144 break;
1145 info->flags |= DF_STATIC_TLS;
1146 /* Fall through */
1147
1148 case R_390_8:
1149 case R_390_16:
1150 case R_390_32:
1151 case R_390_64:
1152 case R_390_PC16:
1153 case R_390_PC16DBL:
1154 case R_390_PC32:
1155 case R_390_PC32DBL:
1156 case R_390_PC64:
1157 if (h != NULL && !info->shared)
1158 {
1159 /* If this reloc is in a read-only section, we might
1160 need a copy reloc. We can't check reliably at this
1161 stage whether the section is read-only, as input
1162 sections have not yet been mapped to output sections.
1163 Tentatively set the flag for now, and correct in
1164 adjust_dynamic_symbol. */
1165 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1166
1167 /* We may need a .plt entry if the function this reloc
1168 refers to is in a shared lib. */
1169 h->plt.refcount += 1;
1170 }
1171
1172 /* If we are creating a shared library, and this is a reloc
1173 against a global symbol, or a non PC relative reloc
1174 against a local symbol, then we need to copy the reloc
1175 into the shared library. However, if we are linking with
1176 -Bsymbolic, we do not need to copy a reloc against a
1177 global symbol which is defined in an object we are
1178 including in the link (i.e., DEF_REGULAR is set). At
1179 this point we have not seen all the input files, so it is
1180 possible that DEF_REGULAR is not set now but will be set
1181 later (it is never cleared). In case of a weak definition,
1182 DEF_REGULAR may be cleared later by a strong definition in
1183 a shared library. We account for that possibility below by
1184 storing information in the relocs_copied field of the hash
1185 table entry. A similar situation occurs when creating
1186 shared libraries and symbol visibility changes render the
1187 symbol local.
1188
1189 If on the other hand, we are creating an executable, we
1190 may need to keep relocations for symbols satisfied by a
1191 dynamic library if we manage to avoid copy relocs for the
1192 symbol. */
1193 if ((info->shared
1194 && (sec->flags & SEC_ALLOC) != 0
1195 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1196 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1197 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1198 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1199 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1200 || (h != NULL
1201 && (! info->symbolic
1202 || h->root.type == bfd_link_hash_defweak
1203 || (h->elf_link_hash_flags
1204 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1205 || (ELIMINATE_COPY_RELOCS
1206 && !info->shared
1207 && (sec->flags & SEC_ALLOC) != 0
1208 && h != NULL
1209 && (h->root.type == bfd_link_hash_defweak
1210 || (h->elf_link_hash_flags
1211 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1212 {
1213 struct elf_s390_dyn_relocs *p;
1214 struct elf_s390_dyn_relocs **head;
1215
1216 /* We must copy these reloc types into the output file.
1217 Create a reloc section in dynobj and make room for
1218 this reloc. */
1219 if (sreloc == NULL)
1220 {
1221 const char *name;
1222 bfd *dynobj;
1223
1224 name = (bfd_elf_string_from_elf_section
1225 (abfd,
1226 elf_elfheader (abfd)->e_shstrndx,
1227 elf_section_data (sec)->rel_hdr.sh_name));
1228 if (name == NULL)
1229 return FALSE;
1230
1231 if (strncmp (name, ".rela", 5) != 0
1232 || strcmp (bfd_get_section_name (abfd, sec),
1233 name + 5) != 0)
1234 {
1235 (*_bfd_error_handler)
1236 (_("%s: bad relocation section name `%s\'"),
1237 bfd_archive_filename (abfd), name);
1238 }
1239
1240 if (htab->elf.dynobj == NULL)
1241 htab->elf.dynobj = abfd;
1242
1243 dynobj = htab->elf.dynobj;
1244 sreloc = bfd_get_section_by_name (dynobj, name);
1245 if (sreloc == NULL)
1246 {
1247 flagword flags;
1248
1249 sreloc = bfd_make_section (dynobj, name);
1250 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1251 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1252 if ((sec->flags & SEC_ALLOC) != 0)
1253 flags |= SEC_ALLOC | SEC_LOAD;
1254 if (sreloc == NULL
1255 || ! bfd_set_section_flags (dynobj, sreloc, flags)
1256 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1257 return FALSE;
1258 }
1259 elf_section_data (sec)->sreloc = sreloc;
1260 }
1261
1262 /* If this is a global symbol, we count the number of
1263 relocations we need for this symbol. */
1264 if (h != NULL)
1265 {
1266 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1267 }
1268 else
1269 {
1270 /* Track dynamic relocs needed for local syms too.
1271 We really need local syms available to do this
1272 easily. Oh well. */
1273
1274 asection *s;
1275 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1276 sec, r_symndx);
1277 if (s == NULL)
1278 return FALSE;
1279
1280 head = ((struct elf_s390_dyn_relocs **)
1281 &elf_section_data (s)->local_dynrel);
1282 }
1283
1284 p = *head;
1285 if (p == NULL || p->sec != sec)
1286 {
1287 bfd_size_type amt = sizeof *p;
1288 p = ((struct elf_s390_dyn_relocs *)
1289 bfd_alloc (htab->elf.dynobj, amt));
1290 if (p == NULL)
1291 return FALSE;
1292 p->next = *head;
1293 *head = p;
1294 p->sec = sec;
1295 p->count = 0;
1296 p->pc_count = 0;
1297 }
1298
1299 p->count += 1;
1300 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1301 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1302 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1303 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1304 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1305 p->pc_count += 1;
1306 }
1307 break;
1308
1309 /* This relocation describes the C++ object vtable hierarchy.
1310 Reconstruct it for later use during GC. */
1311 case R_390_GNU_VTINHERIT:
1312 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1313 return FALSE;
1314 break;
1315
1316 /* This relocation describes which C++ vtable entries are actually
1317 used. Record for later use during GC. */
1318 case R_390_GNU_VTENTRY:
1319 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1320 return FALSE;
1321 break;
1322
1323 default:
1324 break;
1325 }
1326 }
1327
1328 return TRUE;
1329 }
1330
1331 /* Return the section that should be marked against GC for a given
1332 relocation. */
1333
1334 static asection *
1335 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1336 asection *sec;
1337 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1338 Elf_Internal_Rela *rel;
1339 struct elf_link_hash_entry *h;
1340 Elf_Internal_Sym *sym;
1341 {
1342 if (h != NULL)
1343 {
1344 switch (ELF64_R_TYPE (rel->r_info))
1345 {
1346 case R_390_GNU_VTINHERIT:
1347 case R_390_GNU_VTENTRY:
1348 break;
1349
1350 default:
1351 switch (h->root.type)
1352 {
1353 case bfd_link_hash_defined:
1354 case bfd_link_hash_defweak:
1355 return h->root.u.def.section;
1356
1357 case bfd_link_hash_common:
1358 return h->root.u.c.p->section;
1359
1360 default:
1361 break;
1362 }
1363 }
1364 }
1365 else
1366 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1367
1368 return NULL;
1369 }
1370
1371 /* Update the got entry reference counts for the section being removed. */
1372
1373 static bfd_boolean
1374 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1375 bfd *abfd;
1376 struct bfd_link_info *info;
1377 asection *sec;
1378 const Elf_Internal_Rela *relocs;
1379 {
1380 Elf_Internal_Shdr *symtab_hdr;
1381 struct elf_link_hash_entry **sym_hashes;
1382 bfd_signed_vma *local_got_refcounts;
1383 const Elf_Internal_Rela *rel, *relend;
1384
1385 elf_section_data (sec)->local_dynrel = NULL;
1386
1387 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1388 sym_hashes = elf_sym_hashes (abfd);
1389 local_got_refcounts = elf_local_got_refcounts (abfd);
1390
1391 relend = relocs + sec->reloc_count;
1392 for (rel = relocs; rel < relend; rel++)
1393 {
1394 unsigned long r_symndx;
1395 unsigned int r_type;
1396 struct elf_link_hash_entry *h = NULL;
1397
1398 r_symndx = ELF64_R_SYM (rel->r_info);
1399 if (r_symndx >= symtab_hdr->sh_info)
1400 {
1401 struct elf_s390_link_hash_entry *eh;
1402 struct elf_s390_dyn_relocs **pp;
1403 struct elf_s390_dyn_relocs *p;
1404
1405 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1406 eh = (struct elf_s390_link_hash_entry *) h;
1407
1408 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1409 if (p->sec == sec)
1410 {
1411 /* Everything must go for SEC. */
1412 *pp = p->next;
1413 break;
1414 }
1415 }
1416
1417 r_type = ELF64_R_TYPE (rel->r_info);
1418 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1419 switch (r_type)
1420 {
1421 case R_390_TLS_LDM64:
1422 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1423 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1424 break;
1425
1426 case R_390_TLS_GD64:
1427 case R_390_TLS_IE64:
1428 case R_390_TLS_GOTIE12:
1429 case R_390_TLS_GOTIE20:
1430 case R_390_TLS_GOTIE64:
1431 case R_390_TLS_IEENT:
1432 case R_390_GOT12:
1433 case R_390_GOT16:
1434 case R_390_GOT20:
1435 case R_390_GOT32:
1436 case R_390_GOT64:
1437 case R_390_GOTOFF16:
1438 case R_390_GOTOFF32:
1439 case R_390_GOTOFF64:
1440 case R_390_GOTPC:
1441 case R_390_GOTPCDBL:
1442 case R_390_GOTENT:
1443 if (h != NULL)
1444 {
1445 if (h->got.refcount > 0)
1446 h->got.refcount -= 1;
1447 }
1448 else if (local_got_refcounts != NULL)
1449 {
1450 if (local_got_refcounts[r_symndx] > 0)
1451 local_got_refcounts[r_symndx] -= 1;
1452 }
1453 break;
1454
1455 case R_390_8:
1456 case R_390_12:
1457 case R_390_16:
1458 case R_390_20:
1459 case R_390_32:
1460 case R_390_64:
1461 case R_390_PC16:
1462 case R_390_PC16DBL:
1463 case R_390_PC32:
1464 case R_390_PC32DBL:
1465 case R_390_PC64:
1466 if (info->shared)
1467 break;
1468 /* Fall through */
1469
1470 case R_390_PLT16DBL:
1471 case R_390_PLT32:
1472 case R_390_PLT32DBL:
1473 case R_390_PLT64:
1474 case R_390_PLTOFF16:
1475 case R_390_PLTOFF32:
1476 case R_390_PLTOFF64:
1477 if (h != NULL)
1478 {
1479 if (h->plt.refcount > 0)
1480 h->plt.refcount -= 1;
1481 }
1482 break;
1483
1484 case R_390_GOTPLT12:
1485 case R_390_GOTPLT16:
1486 case R_390_GOTPLT20:
1487 case R_390_GOTPLT32:
1488 case R_390_GOTPLT64:
1489 case R_390_GOTPLTENT:
1490 if (h != NULL)
1491 {
1492 if (h->plt.refcount > 0)
1493 {
1494 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1495 h->plt.refcount -= 1;
1496 }
1497 }
1498 else if (local_got_refcounts != NULL)
1499 {
1500 if (local_got_refcounts[r_symndx] > 0)
1501 local_got_refcounts[r_symndx] -= 1;
1502 }
1503 break;
1504
1505 default:
1506 break;
1507 }
1508 }
1509
1510 return TRUE;
1511 }
1512
1513 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1514 entry but we found we will not create any. Called when we find we will
1515 not have any PLT for this symbol, by for example
1516 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1517 or elf_s390_size_dynamic_sections if no dynamic sections will be
1518 created (we're only linking static objects). */
1519
1520 static void
1521 elf_s390_adjust_gotplt (h)
1522 struct elf_s390_link_hash_entry *h;
1523 {
1524 if (h->elf.root.type == bfd_link_hash_warning)
1525 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1526
1527 if (h->gotplt_refcount <= 0)
1528 return;
1529
1530 /* We simply add the number of gotplt references to the number
1531 * of got references for this symbol. */
1532 h->elf.got.refcount += h->gotplt_refcount;
1533 h->gotplt_refcount = -1;
1534 }
1535
1536 /* Adjust a symbol defined by a dynamic object and referenced by a
1537 regular object. The current definition is in some section of the
1538 dynamic object, but we're not including those sections. We have to
1539 change the definition to something the rest of the link can
1540 understand. */
1541
1542 static bfd_boolean
1543 elf_s390_adjust_dynamic_symbol (info, h)
1544 struct bfd_link_info *info;
1545 struct elf_link_hash_entry *h;
1546 {
1547 struct elf_s390_link_hash_table *htab;
1548 asection *s;
1549 unsigned int power_of_two;
1550
1551 /* If this is a function, put it in the procedure linkage table. We
1552 will fill in the contents of the procedure linkage table later
1553 (although we could actually do it here). */
1554 if (h->type == STT_FUNC
1555 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1556 {
1557 if (h->plt.refcount <= 0
1558 || (! info->shared
1559 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
1560 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1561 && h->root.type != bfd_link_hash_undefweak
1562 && h->root.type != bfd_link_hash_undefined))
1563 {
1564 /* This case can occur if we saw a PLT32 reloc in an input
1565 file, but the symbol was never referred to by a dynamic
1566 object, or if all references were garbage collected. In
1567 such a case, we don't actually need to build a procedure
1568 linkage table, and we can just do a PC32 reloc instead. */
1569 h->plt.offset = (bfd_vma) -1;
1570 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1571 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1572 }
1573
1574 return TRUE;
1575 }
1576 else
1577 /* It's possible that we incorrectly decided a .plt reloc was
1578 needed for an R_390_PC32 reloc to a non-function sym in
1579 check_relocs. We can't decide accurately between function and
1580 non-function syms in check-relocs; Objects loaded later in
1581 the link may change h->type. So fix it now. */
1582 h->plt.offset = (bfd_vma) -1;
1583
1584 /* If this is a weak symbol, and there is a real definition, the
1585 processor independent code will have arranged for us to see the
1586 real definition first, and we can just use the same value. */
1587 if (h->weakdef != NULL)
1588 {
1589 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1590 || h->weakdef->root.type == bfd_link_hash_defweak);
1591 h->root.u.def.section = h->weakdef->root.u.def.section;
1592 h->root.u.def.value = h->weakdef->root.u.def.value;
1593 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1594 h->elf_link_hash_flags
1595 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1596 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
1597 return TRUE;
1598 }
1599
1600 /* This is a reference to a symbol defined by a dynamic object which
1601 is not a function. */
1602
1603 /* If we are creating a shared library, we must presume that the
1604 only references to the symbol are via the global offset table.
1605 For such cases we need not do anything here; the relocations will
1606 be handled correctly by relocate_section. */
1607 if (info->shared)
1608 return TRUE;
1609
1610 /* If there are no references to this symbol that do not use the
1611 GOT, we don't need to generate a copy reloc. */
1612 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1613 return TRUE;
1614
1615 /* If -z nocopyreloc was given, we won't generate them either. */
1616 if (info->nocopyreloc)
1617 {
1618 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1619 return TRUE;
1620 }
1621
1622 if (ELIMINATE_COPY_RELOCS)
1623 {
1624 struct elf_s390_link_hash_entry * eh;
1625 struct elf_s390_dyn_relocs *p;
1626
1627 eh = (struct elf_s390_link_hash_entry *) h;
1628 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1629 {
1630 s = p->sec->output_section;
1631 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1632 break;
1633 }
1634
1635 /* If we didn't find any dynamic relocs in read-only sections, then
1636 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1637 if (p == NULL)
1638 {
1639 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1640 return TRUE;
1641 }
1642 }
1643
1644 /* We must allocate the symbol in our .dynbss section, which will
1645 become part of the .bss section of the executable. There will be
1646 an entry for this symbol in the .dynsym section. The dynamic
1647 object will contain position independent code, so all references
1648 from the dynamic object to this symbol will go through the global
1649 offset table. The dynamic linker will use the .dynsym entry to
1650 determine the address it must put in the global offset table, so
1651 both the dynamic object and the regular object will refer to the
1652 same memory location for the variable. */
1653
1654 htab = elf_s390_hash_table (info);
1655
1656 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1657 copy the initial value out of the dynamic object and into the
1658 runtime process image. */
1659 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1660 {
1661 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
1662 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1663 }
1664
1665 /* We need to figure out the alignment required for this symbol. I
1666 have no idea how ELF linkers handle this. */
1667 power_of_two = bfd_log2 (h->size);
1668 if (power_of_two > 3)
1669 power_of_two = 3;
1670
1671 /* Apply the required alignment. */
1672 s = htab->sdynbss;
1673 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1674 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1675 {
1676 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1677 return FALSE;
1678 }
1679
1680 /* Define the symbol as being at this point in the section. */
1681 h->root.u.def.section = s;
1682 h->root.u.def.value = s->_raw_size;
1683
1684 /* Increment the section size to make room for the symbol. */
1685 s->_raw_size += h->size;
1686
1687 return TRUE;
1688 }
1689
1690 /* This is the condition under which elf_s390_finish_dynamic_symbol
1691 will be called from elflink.h. If elflink.h doesn't call our
1692 finish_dynamic_symbol routine, we'll need to do something about
1693 initializing any .plt and .got entries in elf_s390_relocate_section. */
1694 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
1695 ((DYN) \
1696 && ((SHARED) \
1697 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1698 && ((H)->dynindx != -1 \
1699 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1700
1701 /* Allocate space in .plt, .got and associated reloc sections for
1702 dynamic relocs. */
1703
1704 static bfd_boolean
1705 allocate_dynrelocs (h, inf)
1706 struct elf_link_hash_entry *h;
1707 PTR inf;
1708 {
1709 struct bfd_link_info *info;
1710 struct elf_s390_link_hash_table *htab;
1711 struct elf_s390_link_hash_entry *eh;
1712 struct elf_s390_dyn_relocs *p;
1713
1714 if (h->root.type == bfd_link_hash_indirect)
1715 return TRUE;
1716
1717 if (h->root.type == bfd_link_hash_warning)
1718 /* When warning symbols are created, they **replace** the "real"
1719 entry in the hash table, thus we never get to see the real
1720 symbol in a hash traversal. So look at it now. */
1721 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1722
1723 info = (struct bfd_link_info *) inf;
1724 htab = elf_s390_hash_table (info);
1725
1726 if (htab->elf.dynamic_sections_created
1727 && h->plt.refcount > 0
1728 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1729 || h->root.type != bfd_link_hash_undefweak))
1730 {
1731 /* Make sure this symbol is output as a dynamic symbol.
1732 Undefined weak syms won't yet be marked as dynamic. */
1733 if (h->dynindx == -1
1734 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1735 {
1736 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1737 return FALSE;
1738 }
1739
1740 if (info->shared
1741 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1742 {
1743 asection *s = htab->splt;
1744
1745 /* If this is the first .plt entry, make room for the special
1746 first entry. */
1747 if (s->_raw_size == 0)
1748 s->_raw_size += PLT_FIRST_ENTRY_SIZE;
1749
1750 h->plt.offset = s->_raw_size;
1751
1752 /* If this symbol is not defined in a regular file, and we are
1753 not generating a shared library, then set the symbol to this
1754 location in the .plt. This is required to make function
1755 pointers compare as equal between the normal executable and
1756 the shared library. */
1757 if (! info->shared
1758 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1759 {
1760 h->root.u.def.section = s;
1761 h->root.u.def.value = h->plt.offset;
1762 }
1763
1764 /* Make room for this entry. */
1765 s->_raw_size += PLT_ENTRY_SIZE;
1766
1767 /* We also need to make an entry in the .got.plt section, which
1768 will be placed in the .got section by the linker script. */
1769 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1770
1771 /* We also need to make an entry in the .rela.plt section. */
1772 htab->srelplt->_raw_size += sizeof (Elf64_External_Rela);
1773 }
1774 else
1775 {
1776 h->plt.offset = (bfd_vma) -1;
1777 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1778 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1779 }
1780 }
1781 else
1782 {
1783 h->plt.offset = (bfd_vma) -1;
1784 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1785 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1786 }
1787
1788 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1789 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1790 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1791 we can save the dynamic TLS relocation. */
1792 if (h->got.refcount > 0
1793 && !info->shared
1794 && h->dynindx == -1
1795 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1796 {
1797 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1798 /* For the GOTIE access without a literal pool entry the offset has
1799 to be stored somewhere. The immediate value in the instruction
1800 is not bit enough so the value is stored in the got. */
1801 {
1802 h->got.offset = htab->sgot->_raw_size;
1803 htab->sgot->_raw_size += GOT_ENTRY_SIZE;
1804 }
1805 else
1806 h->got.offset = (bfd_vma) -1;
1807 }
1808 else if (h->got.refcount > 0)
1809 {
1810 asection *s;
1811 bfd_boolean dyn;
1812 int tls_type = elf_s390_hash_entry(h)->tls_type;
1813
1814 /* Make sure this symbol is output as a dynamic symbol.
1815 Undefined weak syms won't yet be marked as dynamic. */
1816 if (h->dynindx == -1
1817 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1818 {
1819 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1820 return FALSE;
1821 }
1822
1823 s = htab->sgot;
1824 h->got.offset = s->_raw_size;
1825 s->_raw_size += GOT_ENTRY_SIZE;
1826 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1827 if (tls_type == GOT_TLS_GD)
1828 s->_raw_size += GOT_ENTRY_SIZE;
1829 dyn = htab->elf.dynamic_sections_created;
1830 /* R_390_TLS_IE64 needs one dynamic relocation,
1831 R_390_TLS_GD64 needs one if local symbol and two if global. */
1832 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1833 || tls_type >= GOT_TLS_IE)
1834 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1835 else if (tls_type == GOT_TLS_GD)
1836 htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela);
1837 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1838 || h->root.type != bfd_link_hash_undefweak)
1839 && (info->shared
1840 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1841 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1842 }
1843 else
1844 h->got.offset = (bfd_vma) -1;
1845
1846 eh = (struct elf_s390_link_hash_entry *) h;
1847 if (eh->dyn_relocs == NULL)
1848 return TRUE;
1849
1850 /* In the shared -Bsymbolic case, discard space allocated for
1851 dynamic pc-relative relocs against symbols which turn out to be
1852 defined in regular objects. For the normal shared case, discard
1853 space for pc-relative relocs that have become local due to symbol
1854 visibility changes. */
1855
1856 if (info->shared)
1857 {
1858 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1859 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1860 || info->symbolic))
1861 {
1862 struct elf_s390_dyn_relocs **pp;
1863
1864 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1865 {
1866 p->count -= p->pc_count;
1867 p->pc_count = 0;
1868 if (p->count == 0)
1869 *pp = p->next;
1870 else
1871 pp = &p->next;
1872 }
1873 }
1874
1875 /* Also discard relocs on undefined weak syms with non-default
1876 visibility. */
1877 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1878 && h->root.type == bfd_link_hash_undefweak)
1879 eh->dyn_relocs = NULL;
1880 }
1881 else if (ELIMINATE_COPY_RELOCS)
1882 {
1883 /* For the non-shared case, discard space for relocs against
1884 symbols which turn out to need copy relocs or are not
1885 dynamic. */
1886
1887 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1888 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1889 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1890 || (htab->elf.dynamic_sections_created
1891 && (h->root.type == bfd_link_hash_undefweak
1892 || h->root.type == bfd_link_hash_undefined))))
1893 {
1894 /* Make sure this symbol is output as a dynamic symbol.
1895 Undefined weak syms won't yet be marked as dynamic. */
1896 if (h->dynindx == -1
1897 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1898 {
1899 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1900 return FALSE;
1901 }
1902
1903 /* If that succeeded, we know we'll be keeping all the
1904 relocs. */
1905 if (h->dynindx != -1)
1906 goto keep;
1907 }
1908
1909 eh->dyn_relocs = NULL;
1910
1911 keep: ;
1912 }
1913
1914 /* Finally, allocate space. */
1915 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1916 {
1917 asection *sreloc = elf_section_data (p->sec)->sreloc;
1918 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
1919 }
1920
1921 return TRUE;
1922 }
1923
1924 /* Find any dynamic relocs that apply to read-only sections. */
1925
1926 static bfd_boolean
1927 readonly_dynrelocs (h, inf)
1928 struct elf_link_hash_entry *h;
1929 PTR inf;
1930 {
1931 struct elf_s390_link_hash_entry *eh;
1932 struct elf_s390_dyn_relocs *p;
1933
1934 if (h->root.type == bfd_link_hash_warning)
1935 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1936
1937 eh = (struct elf_s390_link_hash_entry *) h;
1938 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1939 {
1940 asection *s = p->sec->output_section;
1941
1942 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1943 {
1944 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1945
1946 info->flags |= DF_TEXTREL;
1947
1948 /* Not an error, just cut short the traversal. */
1949 return FALSE;
1950 }
1951 }
1952 return TRUE;
1953 }
1954
1955 /* Set the sizes of the dynamic sections. */
1956
1957 static bfd_boolean
1958 elf_s390_size_dynamic_sections (output_bfd, info)
1959 bfd *output_bfd ATTRIBUTE_UNUSED;
1960 struct bfd_link_info *info;
1961 {
1962 struct elf_s390_link_hash_table *htab;
1963 bfd *dynobj;
1964 asection *s;
1965 bfd_boolean relocs;
1966 bfd *ibfd;
1967
1968 htab = elf_s390_hash_table (info);
1969 dynobj = htab->elf.dynobj;
1970 if (dynobj == NULL)
1971 abort ();
1972
1973 if (htab->elf.dynamic_sections_created)
1974 {
1975 /* Set the contents of the .interp section to the interpreter. */
1976 if (info->executable)
1977 {
1978 s = bfd_get_section_by_name (dynobj, ".interp");
1979 if (s == NULL)
1980 abort ();
1981 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1982 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1983 }
1984 }
1985
1986 /* Set up .got offsets for local syms, and space for local dynamic
1987 relocs. */
1988 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1989 {
1990 bfd_signed_vma *local_got;
1991 bfd_signed_vma *end_local_got;
1992 char *local_tls_type;
1993 bfd_size_type locsymcount;
1994 Elf_Internal_Shdr *symtab_hdr;
1995 asection *srela;
1996
1997 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1998 continue;
1999
2000 for (s = ibfd->sections; s != NULL; s = s->next)
2001 {
2002 struct elf_s390_dyn_relocs *p;
2003
2004 for (p = *((struct elf_s390_dyn_relocs **)
2005 &elf_section_data (s)->local_dynrel);
2006 p != NULL;
2007 p = p->next)
2008 {
2009 if (!bfd_is_abs_section (p->sec)
2010 && bfd_is_abs_section (p->sec->output_section))
2011 {
2012 /* Input section has been discarded, either because
2013 it is a copy of a linkonce section or due to
2014 linker script /DISCARD/, so we'll be discarding
2015 the relocs too. */
2016 }
2017 else if (p->count != 0)
2018 {
2019 srela = elf_section_data (p->sec)->sreloc;
2020 srela->_raw_size += p->count * sizeof (Elf64_External_Rela);
2021 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2022 info->flags |= DF_TEXTREL;
2023 }
2024 }
2025 }
2026
2027 local_got = elf_local_got_refcounts (ibfd);
2028 if (!local_got)
2029 continue;
2030
2031 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2032 locsymcount = symtab_hdr->sh_info;
2033 end_local_got = local_got + locsymcount;
2034 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2035 s = htab->sgot;
2036 srela = htab->srelgot;
2037 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2038 {
2039 if (*local_got > 0)
2040 {
2041 *local_got = s->_raw_size;
2042 s->_raw_size += GOT_ENTRY_SIZE;
2043 if (*local_tls_type == GOT_TLS_GD)
2044 s->_raw_size += GOT_ENTRY_SIZE;
2045 if (info->shared)
2046 srela->_raw_size += sizeof (Elf64_External_Rela);
2047 }
2048 else
2049 *local_got = (bfd_vma) -1;
2050 }
2051 }
2052
2053 if (htab->tls_ldm_got.refcount > 0)
2054 {
2055 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2056 relocs. */
2057 htab->tls_ldm_got.offset = htab->sgot->_raw_size;
2058 htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
2059 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
2060 }
2061 else
2062 htab->tls_ldm_got.offset = -1;
2063
2064 /* Allocate global sym .plt and .got entries, and space for global
2065 sym dynamic relocs. */
2066 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2067
2068 /* We now have determined the sizes of the various dynamic sections.
2069 Allocate memory for them. */
2070 relocs = FALSE;
2071 for (s = dynobj->sections; s != NULL; s = s->next)
2072 {
2073 if ((s->flags & SEC_LINKER_CREATED) == 0)
2074 continue;
2075
2076 if (s == htab->splt
2077 || s == htab->sgot
2078 || s == htab->sgotplt)
2079 {
2080 /* Strip this section if we don't need it; see the
2081 comment below. */
2082 }
2083 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2084 {
2085 if (s->_raw_size != 0 && s != htab->srelplt)
2086 relocs = TRUE;
2087
2088 /* We use the reloc_count field as a counter if we need
2089 to copy relocs into the output file. */
2090 s->reloc_count = 0;
2091 }
2092 else
2093 {
2094 /* It's not one of our sections, so don't allocate space. */
2095 continue;
2096 }
2097
2098 if (s->_raw_size == 0)
2099 {
2100 /* If we don't need this section, strip it from the
2101 output file. This is to handle .rela.bss and
2102 .rela.plt. We must create it in
2103 create_dynamic_sections, because it must be created
2104 before the linker maps input sections to output
2105 sections. The linker does that before
2106 adjust_dynamic_symbol is called, and it is that
2107 function which decides whether anything needs to go
2108 into these sections. */
2109
2110 _bfd_strip_section_from_output (info, s);
2111 continue;
2112 }
2113
2114 /* Allocate memory for the section contents. We use bfd_zalloc
2115 here in case unused entries are not reclaimed before the
2116 section's contents are written out. This should not happen,
2117 but this way if it does, we get a R_390_NONE reloc instead
2118 of garbage. */
2119 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2120 if (s->contents == NULL)
2121 return FALSE;
2122 }
2123
2124 if (htab->elf.dynamic_sections_created)
2125 {
2126 /* Add some entries to the .dynamic section. We fill in the
2127 values later, in elf_s390_finish_dynamic_sections, but we
2128 must add the entries now so that we get the correct size for
2129 the .dynamic section. The DT_DEBUG entry is filled in by the
2130 dynamic linker and used by the debugger. */
2131 #define add_dynamic_entry(TAG, VAL) \
2132 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
2133
2134 if (info->executable)
2135 {
2136 if (!add_dynamic_entry (DT_DEBUG, 0))
2137 return FALSE;
2138 }
2139
2140 if (htab->splt->_raw_size != 0)
2141 {
2142 if (!add_dynamic_entry (DT_PLTGOT, 0)
2143 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2144 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2145 || !add_dynamic_entry (DT_JMPREL, 0))
2146 return FALSE;
2147 }
2148
2149 if (relocs)
2150 {
2151 if (!add_dynamic_entry (DT_RELA, 0)
2152 || !add_dynamic_entry (DT_RELASZ, 0)
2153 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2154 return FALSE;
2155
2156 /* If any dynamic relocs apply to a read-only section,
2157 then we need a DT_TEXTREL entry. */
2158 if ((info->flags & DF_TEXTREL) == 0)
2159 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2160 (PTR) info);
2161
2162 if ((info->flags & DF_TEXTREL) != 0)
2163 {
2164 if (!add_dynamic_entry (DT_TEXTREL, 0))
2165 return FALSE;
2166 }
2167 }
2168 }
2169 #undef add_dynamic_entry
2170
2171 return TRUE;
2172 }
2173
2174 /* Return the base VMA address which should be subtracted from real addresses
2175 when resolving @dtpoff relocation.
2176 This is PT_TLS segment p_vaddr. */
2177
2178 static bfd_vma
2179 dtpoff_base (info)
2180 struct bfd_link_info *info;
2181 {
2182 /* If tls_sec is NULL, we should have signalled an error already. */
2183 if (elf_hash_table (info)->tls_sec == NULL)
2184 return 0;
2185 return elf_hash_table (info)->tls_sec->vma;
2186 }
2187
2188 /* Return the relocation value for @tpoff relocation
2189 if STT_TLS virtual address is ADDRESS. */
2190
2191 static bfd_vma
2192 tpoff (info, address)
2193 struct bfd_link_info *info;
2194 bfd_vma address;
2195 {
2196 struct elf_link_hash_table *htab = elf_hash_table (info);
2197
2198 /* If tls_sec is NULL, we should have signalled an error already. */
2199 if (htab->tls_sec == NULL)
2200 return 0;
2201 return htab->tls_size + htab->tls_sec->vma - address;
2202 }
2203
2204 /* Complain if TLS instruction relocation is against an invalid
2205 instruction. */
2206
2207 static void
2208 invalid_tls_insn (input_bfd, input_section, rel)
2209 bfd *input_bfd;
2210 asection *input_section;
2211 Elf_Internal_Rela *rel;
2212 {
2213 reloc_howto_type *howto;
2214
2215 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2216 (*_bfd_error_handler)
2217 (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"),
2218 bfd_archive_filename (input_bfd),
2219 bfd_get_section_name (input_bfd, input_section),
2220 (long) rel->r_offset,
2221 howto->name);
2222 }
2223
2224 /* Relocate a 390 ELF section. */
2225
2226 static bfd_boolean
2227 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2228 contents, relocs, local_syms, local_sections)
2229 bfd *output_bfd;
2230 struct bfd_link_info *info;
2231 bfd *input_bfd;
2232 asection *input_section;
2233 bfd_byte *contents;
2234 Elf_Internal_Rela *relocs;
2235 Elf_Internal_Sym *local_syms;
2236 asection **local_sections;
2237 {
2238 struct elf_s390_link_hash_table *htab;
2239 Elf_Internal_Shdr *symtab_hdr;
2240 struct elf_link_hash_entry **sym_hashes;
2241 bfd_vma *local_got_offsets;
2242 Elf_Internal_Rela *rel;
2243 Elf_Internal_Rela *relend;
2244
2245 if (info->relocatable)
2246 return TRUE;
2247
2248 htab = elf_s390_hash_table (info);
2249 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2250 sym_hashes = elf_sym_hashes (input_bfd);
2251 local_got_offsets = elf_local_got_offsets (input_bfd);
2252
2253 rel = relocs;
2254 relend = relocs + input_section->reloc_count;
2255 for (; rel < relend; rel++)
2256 {
2257 unsigned int r_type;
2258 reloc_howto_type *howto;
2259 unsigned long r_symndx;
2260 struct elf_link_hash_entry *h;
2261 Elf_Internal_Sym *sym;
2262 asection *sec;
2263 bfd_vma off;
2264 bfd_vma relocation;
2265 bfd_boolean unresolved_reloc;
2266 bfd_reloc_status_type r;
2267 int tls_type;
2268
2269 r_type = ELF64_R_TYPE (rel->r_info);
2270 if (r_type == (int) R_390_GNU_VTINHERIT
2271 || r_type == (int) R_390_GNU_VTENTRY)
2272 continue;
2273 if (r_type >= (int) R_390_max)
2274 {
2275 bfd_set_error (bfd_error_bad_value);
2276 return FALSE;
2277 }
2278
2279 howto = elf_howto_table + r_type;
2280 r_symndx = ELF64_R_SYM (rel->r_info);
2281
2282 /* This is a final link. */
2283 h = NULL;
2284 sym = NULL;
2285 sec = NULL;
2286 unresolved_reloc = FALSE;
2287 if (r_symndx < symtab_hdr->sh_info)
2288 {
2289 sym = local_syms + r_symndx;
2290 sec = local_sections[r_symndx];
2291 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2292 }
2293 else
2294 {
2295 bfd_boolean warned ATTRIBUTE_UNUSED;
2296
2297 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
2298 symtab_hdr, relocation, sec,
2299 unresolved_reloc, info,
2300 warned);
2301 }
2302
2303 switch (r_type)
2304 {
2305 case R_390_GOTPLT12:
2306 case R_390_GOTPLT16:
2307 case R_390_GOTPLT20:
2308 case R_390_GOTPLT32:
2309 case R_390_GOTPLT64:
2310 case R_390_GOTPLTENT:
2311 /* There are three cases for a GOTPLT relocation. 1) The
2312 relocation is against the jump slot entry of a plt that
2313 will get emitted to the output file. 2) The relocation
2314 is against the jump slot of a plt entry that has been
2315 removed. elf_s390_adjust_gotplt has created a GOT entry
2316 as replacement. 3) The relocation is against a local symbol.
2317 Cases 2) and 3) are the same as the GOT relocation code
2318 so we just have to test for case 1 and fall through for
2319 the other two. */
2320 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2321 {
2322 bfd_vma plt_index;
2323
2324 /* Calc. index no.
2325 Current offset - size first entry / entry size. */
2326 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2327 PLT_ENTRY_SIZE;
2328
2329 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2330 addr & GOT addr. */
2331 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2332 unresolved_reloc = FALSE;
2333
2334 if (r_type == R_390_GOTPLTENT)
2335 relocation += htab->sgot->output_section->vma;
2336 break;
2337 }
2338 /* Fall through. */
2339
2340 case R_390_GOT12:
2341 case R_390_GOT16:
2342 case R_390_GOT20:
2343 case R_390_GOT32:
2344 case R_390_GOT64:
2345 case R_390_GOTENT:
2346 /* Relocation is to the entry for this symbol in the global
2347 offset table. */
2348 if (htab->sgot == NULL)
2349 abort ();
2350
2351 if (h != NULL)
2352 {
2353 bfd_boolean dyn;
2354
2355 off = h->got.offset;
2356 dyn = htab->elf.dynamic_sections_created;
2357 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2358 || (info->shared
2359 && (info->symbolic
2360 || h->dynindx == -1
2361 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2362 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2363 || (ELF_ST_VISIBILITY (h->other)
2364 && h->root.type == bfd_link_hash_undefweak))
2365 {
2366 /* This is actually a static link, or it is a
2367 -Bsymbolic link and the symbol is defined
2368 locally, or the symbol was forced to be local
2369 because of a version file. We must initialize
2370 this entry in the global offset table. Since the
2371 offset must always be a multiple of 2, we use the
2372 least significant bit to record whether we have
2373 initialized it already.
2374
2375 When doing a dynamic link, we create a .rel.got
2376 relocation entry to initialize the value. This
2377 is done in the finish_dynamic_symbol routine. */
2378 if ((off & 1) != 0)
2379 off &= ~1;
2380 else
2381 {
2382 bfd_put_64 (output_bfd, relocation,
2383 htab->sgot->contents + off);
2384 h->got.offset |= 1;
2385 }
2386 }
2387 else
2388 unresolved_reloc = FALSE;
2389 }
2390 else
2391 {
2392 if (local_got_offsets == NULL)
2393 abort ();
2394
2395 off = local_got_offsets[r_symndx];
2396
2397 /* The offset must always be a multiple of 8. We use
2398 the least significant bit to record whether we have
2399 already generated the necessary reloc. */
2400 if ((off & 1) != 0)
2401 off &= ~1;
2402 else
2403 {
2404 bfd_put_64 (output_bfd, relocation,
2405 htab->sgot->contents + off);
2406
2407 if (info->shared)
2408 {
2409 asection *s;
2410 Elf_Internal_Rela outrel;
2411 bfd_byte *loc;
2412
2413 s = htab->srelgot;
2414 if (s == NULL)
2415 abort ();
2416
2417 outrel.r_offset = (htab->sgot->output_section->vma
2418 + htab->sgot->output_offset
2419 + off);
2420 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2421 outrel.r_addend = relocation;
2422 loc = s->contents;
2423 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2424 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2425 }
2426
2427 local_got_offsets[r_symndx] |= 1;
2428 }
2429 }
2430
2431 if (off >= (bfd_vma) -2)
2432 abort ();
2433
2434 relocation = htab->sgot->output_offset + off;
2435
2436 /* For @GOTENT the relocation is against the offset between
2437 the instruction and the symbols entry in the GOT and not
2438 between the start of the GOT and the symbols entry. We
2439 add the vma of the GOT to get the correct value. */
2440 if ( r_type == R_390_GOTENT
2441 || r_type == R_390_GOTPLTENT)
2442 relocation += htab->sgot->output_section->vma;
2443
2444 break;
2445
2446 case R_390_GOTOFF16:
2447 case R_390_GOTOFF32:
2448 case R_390_GOTOFF64:
2449 /* Relocation is relative to the start of the global offset
2450 table. */
2451
2452 /* Note that sgot->output_offset is not involved in this
2453 calculation. We always want the start of .got. If we
2454 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2455 permitted by the ABI, we might have to change this
2456 calculation. */
2457 relocation -= htab->sgot->output_section->vma;
2458 break;
2459
2460 case R_390_GOTPC:
2461 case R_390_GOTPCDBL:
2462 /* Use global offset table as symbol value. */
2463 relocation = htab->sgot->output_section->vma;
2464 unresolved_reloc = FALSE;
2465 break;
2466
2467 case R_390_PLT16DBL:
2468 case R_390_PLT32:
2469 case R_390_PLT32DBL:
2470 case R_390_PLT64:
2471 /* Relocation is to the entry for this symbol in the
2472 procedure linkage table. */
2473
2474 /* Resolve a PLT32 reloc against a local symbol directly,
2475 without using the procedure linkage table. */
2476 if (h == NULL)
2477 break;
2478
2479 if (h->plt.offset == (bfd_vma) -1
2480 || htab->splt == NULL)
2481 {
2482 /* We didn't make a PLT entry for this symbol. This
2483 happens when statically linking PIC code, or when
2484 using -Bsymbolic. */
2485 break;
2486 }
2487
2488 relocation = (htab->splt->output_section->vma
2489 + htab->splt->output_offset
2490 + h->plt.offset);
2491 unresolved_reloc = FALSE;
2492 break;
2493
2494 case R_390_PLTOFF16:
2495 case R_390_PLTOFF32:
2496 case R_390_PLTOFF64:
2497 /* Relocation is to the entry for this symbol in the
2498 procedure linkage table relative to the start of the GOT. */
2499
2500 /* For local symbols or if we didn't make a PLT entry for
2501 this symbol resolve the symbol directly. */
2502 if ( h == NULL
2503 || h->plt.offset == (bfd_vma) -1
2504 || htab->splt == NULL)
2505 {
2506 relocation -= htab->sgot->output_section->vma;
2507 break;
2508 }
2509
2510 relocation = (htab->splt->output_section->vma
2511 + htab->splt->output_offset
2512 + h->plt.offset
2513 - htab->sgot->output_section->vma);
2514 unresolved_reloc = FALSE;
2515 break;
2516
2517 case R_390_8:
2518 case R_390_16:
2519 case R_390_32:
2520 case R_390_64:
2521 case R_390_PC16:
2522 case R_390_PC16DBL:
2523 case R_390_PC32:
2524 case R_390_PC32DBL:
2525 case R_390_PC64:
2526 /* r_symndx will be zero only for relocs against symbols
2527 from removed linkonce sections, or sections discarded by
2528 a linker script. */
2529 if (r_symndx == 0
2530 || (input_section->flags & SEC_ALLOC) == 0)
2531 break;
2532
2533 if ((info->shared
2534 && (h == NULL
2535 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2536 || h->root.type != bfd_link_hash_undefweak)
2537 && ((r_type != R_390_PC16
2538 && r_type != R_390_PC16DBL
2539 && r_type != R_390_PC32
2540 && r_type != R_390_PC32DBL
2541 && r_type != R_390_PC64)
2542 || (h != NULL
2543 && h->dynindx != -1
2544 && (! info->symbolic
2545 || (h->elf_link_hash_flags
2546 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2547 || (ELIMINATE_COPY_RELOCS
2548 && !info->shared
2549 && h != NULL
2550 && h->dynindx != -1
2551 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2552 && (((h->elf_link_hash_flags
2553 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2554 && (h->elf_link_hash_flags
2555 & ELF_LINK_HASH_DEF_REGULAR) == 0)
2556 || h->root.type == bfd_link_hash_undefweak
2557 || h->root.type == bfd_link_hash_undefined)))
2558 {
2559 Elf_Internal_Rela outrel;
2560 bfd_boolean skip, relocate;
2561 asection *sreloc;
2562 bfd_byte *loc;
2563
2564 /* When generating a shared object, these relocations
2565 are copied into the output file to be resolved at run
2566 time. */
2567 skip = FALSE;
2568 relocate = FALSE;
2569
2570 outrel.r_offset =
2571 _bfd_elf_section_offset (output_bfd, info, input_section,
2572 rel->r_offset);
2573 if (outrel.r_offset == (bfd_vma) -1)
2574 skip = TRUE;
2575 else if (outrel.r_offset == (bfd_vma) -2)
2576 skip = TRUE, relocate = TRUE;
2577
2578 outrel.r_offset += (input_section->output_section->vma
2579 + input_section->output_offset);
2580
2581 if (skip)
2582 memset (&outrel, 0, sizeof outrel);
2583 else if (h != NULL
2584 && h->dynindx != -1
2585 && (r_type == R_390_PC16
2586 || r_type == R_390_PC16DBL
2587 || r_type == R_390_PC32
2588 || r_type == R_390_PC32DBL
2589 || r_type == R_390_PC64
2590 || !info->shared
2591 || !info->symbolic
2592 || (h->elf_link_hash_flags
2593 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2594 {
2595 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2596 outrel.r_addend = rel->r_addend;
2597 }
2598 else
2599 {
2600 /* This symbol is local, or marked to become local. */
2601 outrel.r_addend = relocation + rel->r_addend;
2602 if (r_type == R_390_64)
2603 {
2604 relocate = TRUE;
2605 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2606 }
2607 else
2608 {
2609 long sindx;
2610
2611 if (bfd_is_abs_section (sec))
2612 sindx = 0;
2613 else if (sec == NULL || sec->owner == NULL)
2614 {
2615 bfd_set_error(bfd_error_bad_value);
2616 return FALSE;
2617 }
2618 else
2619 {
2620 asection *osec;
2621
2622 osec = sec->output_section;
2623 sindx = elf_section_data (osec)->dynindx;
2624 BFD_ASSERT (sindx > 0);
2625
2626 /* We are turning this relocation into one
2627 against a section symbol, so subtract out
2628 the output section's address but not the
2629 offset of the input section in the output
2630 section. */
2631
2632 outrel.r_addend -= osec->vma;
2633 }
2634 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2635 }
2636 }
2637
2638 sreloc = elf_section_data (input_section)->sreloc;
2639 if (sreloc == NULL)
2640 abort ();
2641
2642 loc = sreloc->contents;
2643 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2644 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2645
2646 /* If this reloc is against an external symbol, we do
2647 not want to fiddle with the addend. Otherwise, we
2648 need to include the symbol value so that it becomes
2649 an addend for the dynamic reloc. */
2650 if (! relocate)
2651 continue;
2652 }
2653
2654 break;
2655
2656 /* Relocations for tls literal pool entries. */
2657 case R_390_TLS_IE64:
2658 if (info->shared)
2659 {
2660 Elf_Internal_Rela outrel;
2661 asection *sreloc;
2662 bfd_byte *loc;
2663
2664 outrel.r_offset = rel->r_offset
2665 + input_section->output_section->vma
2666 + input_section->output_offset;
2667 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2668 sreloc = elf_section_data (input_section)->sreloc;
2669 if (sreloc == NULL)
2670 abort ();
2671 loc = sreloc->contents;
2672 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2673 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2674 }
2675 /* Fall through. */
2676
2677 case R_390_TLS_GD64:
2678 case R_390_TLS_GOTIE64:
2679 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2680 tls_type = GOT_UNKNOWN;
2681 if (h == NULL && local_got_offsets)
2682 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2683 else if (h != NULL)
2684 {
2685 tls_type = elf_s390_hash_entry(h)->tls_type;
2686 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2687 r_type = R_390_TLS_LE64;
2688 }
2689 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2690 r_type = R_390_TLS_IE64;
2691
2692 if (r_type == R_390_TLS_LE64)
2693 {
2694 /* This relocation gets optimized away by the local exec
2695 access optimization. */
2696 BFD_ASSERT (! unresolved_reloc);
2697 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2698 contents + rel->r_offset);
2699 continue;
2700 }
2701
2702 if (htab->sgot == NULL)
2703 abort ();
2704
2705 if (h != NULL)
2706 off = h->got.offset;
2707 else
2708 {
2709 if (local_got_offsets == NULL)
2710 abort ();
2711
2712 off = local_got_offsets[r_symndx];
2713 }
2714
2715 emit_tls_relocs:
2716
2717 if ((off & 1) != 0)
2718 off &= ~1;
2719 else
2720 {
2721 Elf_Internal_Rela outrel;
2722 bfd_byte *loc;
2723 int dr_type, indx;
2724
2725 if (htab->srelgot == NULL)
2726 abort ();
2727
2728 outrel.r_offset = (htab->sgot->output_section->vma
2729 + htab->sgot->output_offset + off);
2730
2731 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2732 if (r_type == R_390_TLS_GD64)
2733 dr_type = R_390_TLS_DTPMOD;
2734 else
2735 dr_type = R_390_TLS_TPOFF;
2736 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2737 outrel.r_addend = relocation - dtpoff_base (info);
2738 else
2739 outrel.r_addend = 0;
2740 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2741 loc = htab->srelgot->contents;
2742 loc += htab->srelgot->reloc_count++
2743 * sizeof (Elf64_External_Rela);
2744 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2745
2746 if (r_type == R_390_TLS_GD64)
2747 {
2748 if (indx == 0)
2749 {
2750 BFD_ASSERT (! unresolved_reloc);
2751 bfd_put_64 (output_bfd,
2752 relocation - dtpoff_base (info),
2753 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2754 }
2755 else
2756 {
2757 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2758 outrel.r_offset += GOT_ENTRY_SIZE;
2759 outrel.r_addend = 0;
2760 htab->srelgot->reloc_count++;
2761 loc += sizeof (Elf64_External_Rela);
2762 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2763 }
2764 }
2765
2766 if (h != NULL)
2767 h->got.offset |= 1;
2768 else
2769 local_got_offsets[r_symndx] |= 1;
2770 }
2771
2772 if (off >= (bfd_vma) -2)
2773 abort ();
2774 if (r_type == ELF64_R_TYPE (rel->r_info))
2775 {
2776 relocation = htab->sgot->output_offset + off;
2777 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2778 relocation += htab->sgot->output_section->vma;
2779 unresolved_reloc = FALSE;
2780 }
2781 else
2782 {
2783 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2784 contents + rel->r_offset);
2785 continue;
2786 }
2787 break;
2788
2789 case R_390_TLS_GOTIE12:
2790 case R_390_TLS_GOTIE20:
2791 case R_390_TLS_IEENT:
2792 if (h == NULL)
2793 {
2794 if (local_got_offsets == NULL)
2795 abort();
2796 off = local_got_offsets[r_symndx];
2797 if (info->shared)
2798 goto emit_tls_relocs;
2799 }
2800 else
2801 {
2802 off = h->got.offset;
2803 tls_type = elf_s390_hash_entry(h)->tls_type;
2804 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2805 goto emit_tls_relocs;
2806 }
2807
2808 if (htab->sgot == NULL)
2809 abort ();
2810
2811 BFD_ASSERT (! unresolved_reloc);
2812 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2813 htab->sgot->contents + off);
2814 relocation = htab->sgot->output_offset + off;
2815 if (r_type == R_390_TLS_IEENT)
2816 relocation += htab->sgot->output_section->vma;
2817 unresolved_reloc = FALSE;
2818 break;
2819
2820 case R_390_TLS_LDM64:
2821 if (! info->shared)
2822 /* The literal pool entry this relocation refers to gets ignored
2823 by the optimized code of the local exec model. Do nothing
2824 and the value will turn out zero. */
2825 continue;
2826
2827 if (htab->sgot == NULL)
2828 abort ();
2829
2830 off = htab->tls_ldm_got.offset;
2831 if (off & 1)
2832 off &= ~1;
2833 else
2834 {
2835 Elf_Internal_Rela outrel;
2836 bfd_byte *loc;
2837
2838 if (htab->srelgot == NULL)
2839 abort ();
2840
2841 outrel.r_offset = (htab->sgot->output_section->vma
2842 + htab->sgot->output_offset + off);
2843
2844 bfd_put_64 (output_bfd, 0,
2845 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2846 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2847 outrel.r_addend = 0;
2848 loc = htab->srelgot->contents;
2849 loc += htab->srelgot->reloc_count++
2850 * sizeof (Elf64_External_Rela);
2851 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2852 htab->tls_ldm_got.offset |= 1;
2853 }
2854 relocation = htab->sgot->output_offset + off;
2855 unresolved_reloc = FALSE;
2856 break;
2857
2858 case R_390_TLS_LE64:
2859 if (info->shared)
2860 {
2861 /* Linking a shared library with non-fpic code requires
2862 a R_390_TLS_TPOFF relocation. */
2863 Elf_Internal_Rela outrel;
2864 asection *sreloc;
2865 bfd_byte *loc;
2866 int indx;
2867
2868 outrel.r_offset = rel->r_offset
2869 + input_section->output_section->vma
2870 + input_section->output_offset;
2871 if (h != NULL && h->dynindx != -1)
2872 indx = h->dynindx;
2873 else
2874 indx = 0;
2875 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2876 if (indx == 0)
2877 outrel.r_addend = relocation - dtpoff_base (info);
2878 else
2879 outrel.r_addend = 0;
2880 sreloc = elf_section_data (input_section)->sreloc;
2881 if (sreloc == NULL)
2882 abort ();
2883 loc = sreloc->contents;
2884 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2885 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2886 }
2887 else
2888 {
2889 BFD_ASSERT (! unresolved_reloc);
2890 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2891 contents + rel->r_offset);
2892 }
2893 continue;
2894
2895 case R_390_TLS_LDO64:
2896 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2897 relocation -= dtpoff_base (info);
2898 else
2899 /* When converting LDO to LE, we must negate. */
2900 relocation = -tpoff (info, relocation);
2901 break;
2902
2903 /* Relocations for tls instructions. */
2904 case R_390_TLS_LOAD:
2905 case R_390_TLS_GDCALL:
2906 case R_390_TLS_LDCALL:
2907 tls_type = GOT_UNKNOWN;
2908 if (h == NULL && local_got_offsets)
2909 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2910 else if (h != NULL)
2911 tls_type = elf_s390_hash_entry(h)->tls_type;
2912
2913 if (tls_type == GOT_TLS_GD)
2914 continue;
2915
2916 if (r_type == R_390_TLS_LOAD)
2917 {
2918 if (!info->shared && (h == NULL || h->dynindx == -1))
2919 {
2920 /* IE->LE transition. Four valid cases:
2921 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2922 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2923 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2924 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2925 unsigned int insn0, insn1, ry;
2926
2927 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2928 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2929 if (insn1 != 0x0004)
2930 invalid_tls_insn (input_bfd, input_section, rel);
2931 ry = 0;
2932 if ((insn0 & 0xff00f000) == 0xe3000000)
2933 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2934 ry = (insn0 & 0x000f0000);
2935 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2936 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2937 ry = (insn0 & 0x0000f000) << 4;
2938 else if ((insn0 & 0xff00f000) == 0xe300c000)
2939 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2940 ry = (insn0 & 0x000f0000);
2941 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2942 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2943 ry = (insn0 & 0x0000f000) << 4;
2944 else
2945 invalid_tls_insn (input_bfd, input_section, rel);
2946 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2947 insn1 = 0x000d;
2948 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2949 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2950 }
2951 }
2952 else if (r_type == R_390_TLS_GDCALL)
2953 {
2954 unsigned int insn0, insn1;
2955
2956 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2957 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2958 if ((insn0 & 0xffff0000) != 0xc0e50000)
2959 invalid_tls_insn (input_bfd, input_section, rel);
2960 if (!info->shared && (h == NULL || h->dynindx == -1))
2961 {
2962 /* GD->LE transition.
2963 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2964 insn0 = 0xc0040000;
2965 insn1 = 0x0000;
2966 }
2967 else
2968 {
2969 /* GD->IE transition.
2970 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2971 insn0 = 0xe322c000;
2972 insn1 = 0x0004;
2973 }
2974 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2975 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2976 }
2977 else if (r_type == R_390_TLS_LDCALL)
2978 {
2979 if (!info->shared)
2980 {
2981 unsigned int insn0, insn1;
2982
2983 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2984 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2985 if ((insn0 & 0xffff0000) != 0xc0e50000)
2986 invalid_tls_insn (input_bfd, input_section, rel);
2987 /* LD->LE transition.
2988 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2989 insn0 = 0xc0040000;
2990 insn1 = 0x0000;
2991 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2992 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2993 }
2994 }
2995 continue;
2996
2997 default:
2998 break;
2999 }
3000
3001 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3002 because such sections are not SEC_ALLOC and thus ld.so will
3003 not process them. */
3004 if (unresolved_reloc
3005 && !((input_section->flags & SEC_DEBUGGING) != 0
3006 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
3007 (*_bfd_error_handler)
3008 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
3009 bfd_archive_filename (input_bfd),
3010 bfd_get_section_name (input_bfd, input_section),
3011 (long) rel->r_offset,
3012 h->root.root.string);
3013
3014 if (r_type == R_390_20
3015 || r_type == R_390_GOT20
3016 || r_type == R_390_GOTPLT20
3017 || r_type == R_390_TLS_GOTIE20)
3018 {
3019 relocation += rel->r_addend;
3020 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3021 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3022 contents, rel->r_offset,
3023 relocation, 0);
3024 }
3025 else
3026 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3027 contents, rel->r_offset,
3028 relocation, rel->r_addend);
3029
3030 if (r != bfd_reloc_ok)
3031 {
3032 const char *name;
3033
3034 if (h != NULL)
3035 name = h->root.root.string;
3036 else
3037 {
3038 name = bfd_elf_string_from_elf_section (input_bfd,
3039 symtab_hdr->sh_link,
3040 sym->st_name);
3041 if (name == NULL)
3042 return FALSE;
3043 if (*name == '\0')
3044 name = bfd_section_name (input_bfd, sec);
3045 }
3046
3047 if (r == bfd_reloc_overflow)
3048 {
3049
3050 if (! ((*info->callbacks->reloc_overflow)
3051 (info, name, howto->name, (bfd_vma) 0,
3052 input_bfd, input_section, rel->r_offset)))
3053 return FALSE;
3054 }
3055 else
3056 {
3057 (*_bfd_error_handler)
3058 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
3059 bfd_archive_filename (input_bfd),
3060 bfd_get_section_name (input_bfd, input_section),
3061 (long) rel->r_offset, name, (int) r);
3062 return FALSE;
3063 }
3064 }
3065 }
3066
3067 return TRUE;
3068 }
3069
3070 /* Finish up dynamic symbol handling. We set the contents of various
3071 dynamic sections here. */
3072
3073 static bfd_boolean
3074 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3075 bfd *output_bfd;
3076 struct bfd_link_info *info;
3077 struct elf_link_hash_entry *h;
3078 Elf_Internal_Sym *sym;
3079 {
3080 struct elf_s390_link_hash_table *htab;
3081
3082 htab = elf_s390_hash_table (info);
3083
3084 if (h->plt.offset != (bfd_vma) -1)
3085 {
3086 bfd_vma plt_index;
3087 bfd_vma got_offset;
3088 Elf_Internal_Rela rela;
3089 bfd_byte *loc;
3090
3091 /* This symbol has an entry in the procedure linkage table. Set
3092 it up. */
3093
3094 if (h->dynindx == -1
3095 || htab->splt == NULL
3096 || htab->sgotplt == NULL
3097 || htab->srelplt == NULL)
3098 abort ();
3099
3100 /* Calc. index no.
3101 Current offset - size first entry / entry size. */
3102 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3103
3104 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3105 addr & GOT addr. */
3106 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3107
3108 /* Fill in the blueprint of a PLT. */
3109 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3110 htab->splt->contents + h->plt.offset);
3111 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3112 htab->splt->contents + h->plt.offset + 4);
3113 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3114 htab->splt->contents + h->plt.offset + 8);
3115 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3116 htab->splt->contents + h->plt.offset + 12);
3117 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3118 htab->splt->contents + h->plt.offset + 16);
3119 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3120 htab->splt->contents + h->plt.offset + 20);
3121 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3122 htab->splt->contents + h->plt.offset + 24);
3123 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3124 htab->splt->contents + h->plt.offset + 28);
3125 /* Fixup the relative address to the GOT entry */
3126 bfd_put_32 (output_bfd,
3127 (htab->sgotplt->output_section->vma +
3128 htab->sgotplt->output_offset + got_offset
3129 - (htab->splt->output_section->vma + h->plt.offset))/2,
3130 htab->splt->contents + h->plt.offset + 2);
3131 /* Fixup the relative branch to PLT 0 */
3132 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3133 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3134 htab->splt->contents + h->plt.offset + 24);
3135 /* Fixup offset into symbol table */
3136 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3137 htab->splt->contents + h->plt.offset + 28);
3138
3139 /* Fill in the entry in the global offset table.
3140 Points to instruction after GOT offset. */
3141 bfd_put_64 (output_bfd,
3142 (htab->splt->output_section->vma
3143 + htab->splt->output_offset
3144 + h->plt.offset
3145 + 14),
3146 htab->sgotplt->contents + got_offset);
3147
3148 /* Fill in the entry in the .rela.plt section. */
3149 rela.r_offset = (htab->sgotplt->output_section->vma
3150 + htab->sgotplt->output_offset
3151 + got_offset);
3152 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3153 rela.r_addend = 0;
3154 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3155 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3156
3157 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3158 {
3159 /* Mark the symbol as undefined, rather than as defined in
3160 the .plt section. Leave the value alone. This is a clue
3161 for the dynamic linker, to make function pointer
3162 comparisons work between an application and shared
3163 library. */
3164 sym->st_shndx = SHN_UNDEF;
3165 }
3166 }
3167
3168 if (h->got.offset != (bfd_vma) -1
3169 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3170 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3171 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3172 {
3173 Elf_Internal_Rela rela;
3174 bfd_byte *loc;
3175
3176 /* This symbol has an entry in the global offset table. Set it
3177 up. */
3178 if (htab->sgot == NULL || htab->srelgot == NULL)
3179 abort ();
3180
3181 rela.r_offset = (htab->sgot->output_section->vma
3182 + htab->sgot->output_offset
3183 + (h->got.offset &~ (bfd_vma) 1));
3184
3185 /* If this is a static link, or it is a -Bsymbolic link and the
3186 symbol is defined locally or was forced to be local because
3187 of a version file, we just want to emit a RELATIVE reloc.
3188 The entry in the global offset table will already have been
3189 initialized in the relocate_section function. */
3190 if (info->shared
3191 && (info->symbolic
3192 || h->dynindx == -1
3193 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
3194 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3195 {
3196 BFD_ASSERT((h->got.offset & 1) != 0);
3197 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3198 rela.r_addend = (h->root.u.def.value
3199 + h->root.u.def.section->output_section->vma
3200 + h->root.u.def.section->output_offset);
3201 }
3202 else
3203 {
3204 BFD_ASSERT((h->got.offset & 1) == 0);
3205 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3206 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3207 rela.r_addend = 0;
3208 }
3209
3210 loc = htab->srelgot->contents;
3211 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3212 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3213 }
3214
3215 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3216 {
3217 Elf_Internal_Rela rela;
3218 bfd_byte *loc;
3219
3220 /* This symbols needs a copy reloc. Set it up. */
3221
3222 if (h->dynindx == -1
3223 || (h->root.type != bfd_link_hash_defined
3224 && h->root.type != bfd_link_hash_defweak)
3225 || htab->srelbss == NULL)
3226 abort ();
3227
3228 rela.r_offset = (h->root.u.def.value
3229 + h->root.u.def.section->output_section->vma
3230 + h->root.u.def.section->output_offset);
3231 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3232 rela.r_addend = 0;
3233 loc = htab->srelbss->contents;
3234 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3235 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3236 }
3237
3238 /* Mark some specially defined symbols as absolute. */
3239 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3240 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3241 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3242 sym->st_shndx = SHN_ABS;
3243
3244 return TRUE;
3245 }
3246
3247 /* Used to decide how to sort relocs in an optimal manner for the
3248 dynamic linker, before writing them out. */
3249
3250 static enum elf_reloc_type_class
3251 elf_s390_reloc_type_class (rela)
3252 const Elf_Internal_Rela *rela;
3253 {
3254 switch ((int) ELF64_R_TYPE (rela->r_info))
3255 {
3256 case R_390_RELATIVE:
3257 return reloc_class_relative;
3258 case R_390_JMP_SLOT:
3259 return reloc_class_plt;
3260 case R_390_COPY:
3261 return reloc_class_copy;
3262 default:
3263 return reloc_class_normal;
3264 }
3265 }
3266
3267 /* Finish up the dynamic sections. */
3268
3269 static bfd_boolean
3270 elf_s390_finish_dynamic_sections (output_bfd, info)
3271 bfd *output_bfd;
3272 struct bfd_link_info *info;
3273 {
3274 struct elf_s390_link_hash_table *htab;
3275 bfd *dynobj;
3276 asection *sdyn;
3277
3278 htab = elf_s390_hash_table (info);
3279 dynobj = htab->elf.dynobj;
3280 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3281
3282 if (htab->elf.dynamic_sections_created)
3283 {
3284 Elf64_External_Dyn *dyncon, *dynconend;
3285
3286 if (sdyn == NULL || htab->sgot == NULL)
3287 abort ();
3288
3289 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3290 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3291 for (; dyncon < dynconend; dyncon++)
3292 {
3293 Elf_Internal_Dyn dyn;
3294 asection *s;
3295
3296 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3297
3298 switch (dyn.d_tag)
3299 {
3300 default:
3301 continue;
3302
3303 case DT_PLTGOT:
3304 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3305 break;
3306
3307 case DT_JMPREL:
3308 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3309 break;
3310
3311 case DT_PLTRELSZ:
3312 s = htab->srelplt->output_section;
3313 if (s->_cooked_size != 0)
3314 dyn.d_un.d_val = s->_cooked_size;
3315 else
3316 dyn.d_un.d_val = s->_raw_size;
3317 break;
3318
3319 case DT_RELASZ:
3320 /* The procedure linkage table relocs (DT_JMPREL) should
3321 not be included in the overall relocs (DT_RELA).
3322 Therefore, we override the DT_RELASZ entry here to
3323 make it not include the JMPREL relocs. Since the
3324 linker script arranges for .rela.plt to follow all
3325 other relocation sections, we don't have to worry
3326 about changing the DT_RELA entry. */
3327 s = htab->srelplt->output_section;
3328 if (s->_cooked_size != 0)
3329 dyn.d_un.d_val -= s->_cooked_size;
3330 else
3331 dyn.d_un.d_val -= s->_raw_size;
3332 break;
3333 }
3334
3335 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3336 }
3337
3338 /* Fill in the special first entry in the procedure linkage table. */
3339 if (htab->splt && htab->splt->_raw_size > 0)
3340 {
3341 /* fill in blueprint for plt 0 entry */
3342 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3343 htab->splt->contents );
3344 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3345 htab->splt->contents +4 );
3346 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3347 htab->splt->contents +12 );
3348 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3349 htab->splt->contents +16 );
3350 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3351 htab->splt->contents +20 );
3352 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3353 htab->splt->contents + 24);
3354 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3355 htab->splt->contents + 28 );
3356 /* Fixup relative address to start of GOT */
3357 bfd_put_32 (output_bfd,
3358 (htab->sgotplt->output_section->vma +
3359 htab->sgotplt->output_offset
3360 - htab->splt->output_section->vma - 6)/2,
3361 htab->splt->contents + 8);
3362 }
3363 elf_section_data (htab->splt->output_section)
3364 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3365 }
3366
3367 if (htab->sgotplt)
3368 {
3369 /* Fill in the first three entries in the global offset table. */
3370 if (htab->sgotplt->_raw_size > 0)
3371 {
3372 bfd_put_64 (output_bfd,
3373 (sdyn == NULL ? (bfd_vma) 0
3374 : sdyn->output_section->vma + sdyn->output_offset),
3375 htab->sgotplt->contents);
3376 /* One entry for shared object struct ptr. */
3377 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3378 /* One entry for _dl_runtime_resolve. */
3379 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3380 }
3381
3382 elf_section_data (htab->sgot->output_section)
3383 ->this_hdr.sh_entsize = 8;
3384 }
3385 return TRUE;
3386 }
3387
3388 /* Why was the hash table entry size definition changed from
3389 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3390 this is the only reason for the s390_elf64_size_info structure. */
3391
3392 const struct elf_size_info s390_elf64_size_info =
3393 {
3394 sizeof (Elf64_External_Ehdr),
3395 sizeof (Elf64_External_Phdr),
3396 sizeof (Elf64_External_Shdr),
3397 sizeof (Elf64_External_Rel),
3398 sizeof (Elf64_External_Rela),
3399 sizeof (Elf64_External_Sym),
3400 sizeof (Elf64_External_Dyn),
3401 sizeof (Elf_External_Note),
3402 8, /* hash-table entry size. */
3403 1, /* internal relocations per external relocations. */
3404 64, /* arch_size. */
3405 3, /* log_file_align. */
3406 ELFCLASS64, EV_CURRENT,
3407 bfd_elf64_write_out_phdrs,
3408 bfd_elf64_write_shdrs_and_ehdr,
3409 bfd_elf64_write_relocs,
3410 bfd_elf64_swap_symbol_in,
3411 bfd_elf64_swap_symbol_out,
3412 bfd_elf64_slurp_reloc_table,
3413 bfd_elf64_slurp_symbol_table,
3414 bfd_elf64_swap_dyn_in,
3415 bfd_elf64_swap_dyn_out,
3416 bfd_elf64_swap_reloc_in,
3417 bfd_elf64_swap_reloc_out,
3418 bfd_elf64_swap_reloca_in,
3419 bfd_elf64_swap_reloca_out
3420 };
3421
3422 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3423 #define TARGET_BIG_NAME "elf64-s390"
3424 #define ELF_ARCH bfd_arch_s390
3425 #define ELF_MACHINE_CODE EM_S390
3426 #define ELF_MACHINE_ALT1 EM_S390_OLD
3427 #define ELF_MAXPAGESIZE 0x1000
3428
3429 #define elf_backend_size_info s390_elf64_size_info
3430
3431 #define elf_backend_can_gc_sections 1
3432 #define elf_backend_can_refcount 1
3433 #define elf_backend_want_got_plt 1
3434 #define elf_backend_plt_readonly 1
3435 #define elf_backend_want_plt_sym 0
3436 #define elf_backend_got_header_size 24
3437 #define elf_backend_rela_normal 1
3438
3439 #define elf_info_to_howto elf_s390_info_to_howto
3440
3441 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3442 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3443 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3444
3445 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3446 #define elf_backend_check_relocs elf_s390_check_relocs
3447 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3448 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3449 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3450 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3451 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3452 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3453 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3454 #define elf_backend_relocate_section elf_s390_relocate_section
3455 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3456 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3457
3458 #define bfd_elf64_mkobject elf_s390_mkobject
3459 #define elf_backend_object_p elf_s390_object_p
3460
3461 #include "elf64-target.h"
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