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[binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27
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 bfd_boolean elf_s390_grok_prstatus
80 PARAMS ((bfd *, Elf_Internal_Note *));
81 static int elf_s390_tls_transition
82 PARAMS ((struct bfd_link_info *, int, int));
83 static bfd_reloc_status_type s390_tls_reloc
84 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
85 static bfd_vma dtpoff_base
86 PARAMS ((struct bfd_link_info *));
87 static bfd_vma tpoff
88 PARAMS ((struct bfd_link_info *, bfd_vma));
89 static void invalid_tls_insn
90 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
91 static bfd_reloc_status_type s390_elf_ldisp_reloc
92 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
93
94 #include "elf/s390.h"
95
96 /* The relocation "howto" table. */
97
98 static reloc_howto_type elf_howto_table[] =
99 {
100 HOWTO (R_390_NONE, /* type */
101 0, /* rightshift */
102 0, /* size (0 = byte, 1 = short, 2 = long) */
103 0, /* bitsize */
104 FALSE, /* pc_relative */
105 0, /* bitpos */
106 complain_overflow_dont, /* complain_on_overflow */
107 bfd_elf_generic_reloc, /* special_function */
108 "R_390_NONE", /* name */
109 FALSE, /* partial_inplace */
110 0, /* src_mask */
111 0, /* dst_mask */
112 FALSE), /* pcrel_offset */
113
114 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
116 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
117 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
118 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
120 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
122 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
124 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
126 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
128 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
130 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
132 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
134 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
136 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
138 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
140 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
142 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
144 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
146 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
148 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
150 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
152 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
154 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
156 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
157 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
158 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
159 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
160 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
162 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
164 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
165 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
166 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
167 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
169 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
171 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
172 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
174 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
176 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
178 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
179 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
180 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
181 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
182 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
183 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
184 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
185 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
186 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
187 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
188 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
189 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
190 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
191 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
192 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
193 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
194 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
195 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
196 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
197 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
198 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
199 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
200 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
201 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
202 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
203 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
204 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
205 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
206 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
207 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
208 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
209 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
210 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
211 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
212 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
213 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
214 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
215 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
216 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
217 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
218 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
219 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
220 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
221 };
222
223 /* GNU extension to record C++ vtable hierarchy. */
224 static reloc_howto_type elf32_s390_vtinherit_howto =
225 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
226 static reloc_howto_type elf32_s390_vtentry_howto =
227 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
228
229 static reloc_howto_type *
230 elf_s390_reloc_type_lookup (abfd, code)
231 bfd *abfd ATTRIBUTE_UNUSED;
232 bfd_reloc_code_real_type code;
233 {
234 switch (code)
235 {
236 case BFD_RELOC_NONE:
237 return &elf_howto_table[(int) R_390_NONE];
238 case BFD_RELOC_8:
239 return &elf_howto_table[(int) R_390_8];
240 case BFD_RELOC_390_12:
241 return &elf_howto_table[(int) R_390_12];
242 case BFD_RELOC_16:
243 return &elf_howto_table[(int) R_390_16];
244 case BFD_RELOC_32:
245 return &elf_howto_table[(int) R_390_32];
246 case BFD_RELOC_CTOR:
247 return &elf_howto_table[(int) R_390_32];
248 case BFD_RELOC_32_PCREL:
249 return &elf_howto_table[(int) R_390_PC32];
250 case BFD_RELOC_390_GOT12:
251 return &elf_howto_table[(int) R_390_GOT12];
252 case BFD_RELOC_32_GOT_PCREL:
253 return &elf_howto_table[(int) R_390_GOT32];
254 case BFD_RELOC_390_PLT32:
255 return &elf_howto_table[(int) R_390_PLT32];
256 case BFD_RELOC_390_COPY:
257 return &elf_howto_table[(int) R_390_COPY];
258 case BFD_RELOC_390_GLOB_DAT:
259 return &elf_howto_table[(int) R_390_GLOB_DAT];
260 case BFD_RELOC_390_JMP_SLOT:
261 return &elf_howto_table[(int) R_390_JMP_SLOT];
262 case BFD_RELOC_390_RELATIVE:
263 return &elf_howto_table[(int) R_390_RELATIVE];
264 case BFD_RELOC_32_GOTOFF:
265 return &elf_howto_table[(int) R_390_GOTOFF32];
266 case BFD_RELOC_390_GOTPC:
267 return &elf_howto_table[(int) R_390_GOTPC];
268 case BFD_RELOC_390_GOT16:
269 return &elf_howto_table[(int) R_390_GOT16];
270 case BFD_RELOC_16_PCREL:
271 return &elf_howto_table[(int) R_390_PC16];
272 case BFD_RELOC_390_PC16DBL:
273 return &elf_howto_table[(int) R_390_PC16DBL];
274 case BFD_RELOC_390_PLT16DBL:
275 return &elf_howto_table[(int) R_390_PLT16DBL];
276 case BFD_RELOC_390_PC32DBL:
277 return &elf_howto_table[(int) R_390_PC32DBL];
278 case BFD_RELOC_390_PLT32DBL:
279 return &elf_howto_table[(int) R_390_PLT32DBL];
280 case BFD_RELOC_390_GOTPCDBL:
281 return &elf_howto_table[(int) R_390_GOTPCDBL];
282 case BFD_RELOC_390_GOTENT:
283 return &elf_howto_table[(int) R_390_GOTENT];
284 case BFD_RELOC_16_GOTOFF:
285 return &elf_howto_table[(int) R_390_GOTOFF16];
286 case BFD_RELOC_390_GOTPLT12:
287 return &elf_howto_table[(int) R_390_GOTPLT12];
288 case BFD_RELOC_390_GOTPLT16:
289 return &elf_howto_table[(int) R_390_GOTPLT16];
290 case BFD_RELOC_390_GOTPLT32:
291 return &elf_howto_table[(int) R_390_GOTPLT32];
292 case BFD_RELOC_390_GOTPLTENT:
293 return &elf_howto_table[(int) R_390_GOTPLTENT];
294 case BFD_RELOC_390_PLTOFF16:
295 return &elf_howto_table[(int) R_390_PLTOFF16];
296 case BFD_RELOC_390_PLTOFF32:
297 return &elf_howto_table[(int) R_390_PLTOFF32];
298 case BFD_RELOC_390_TLS_LOAD:
299 return &elf_howto_table[(int) R_390_TLS_LOAD];
300 case BFD_RELOC_390_TLS_GDCALL:
301 return &elf_howto_table[(int) R_390_TLS_GDCALL];
302 case BFD_RELOC_390_TLS_LDCALL:
303 return &elf_howto_table[(int) R_390_TLS_LDCALL];
304 case BFD_RELOC_390_TLS_GD32:
305 return &elf_howto_table[(int) R_390_TLS_GD32];
306 case BFD_RELOC_390_TLS_GOTIE12:
307 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
308 case BFD_RELOC_390_TLS_GOTIE32:
309 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
310 case BFD_RELOC_390_TLS_LDM32:
311 return &elf_howto_table[(int) R_390_TLS_LDM32];
312 case BFD_RELOC_390_TLS_IE32:
313 return &elf_howto_table[(int) R_390_TLS_IE32];
314 case BFD_RELOC_390_TLS_IEENT:
315 return &elf_howto_table[(int) R_390_TLS_IEENT];
316 case BFD_RELOC_390_TLS_LE32:
317 return &elf_howto_table[(int) R_390_TLS_LE32];
318 case BFD_RELOC_390_TLS_LDO32:
319 return &elf_howto_table[(int) R_390_TLS_LDO32];
320 case BFD_RELOC_390_TLS_DTPMOD:
321 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
322 case BFD_RELOC_390_TLS_DTPOFF:
323 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
324 case BFD_RELOC_390_TLS_TPOFF:
325 return &elf_howto_table[(int) R_390_TLS_TPOFF];
326 case BFD_RELOC_390_20:
327 return &elf_howto_table[(int) R_390_20];
328 case BFD_RELOC_390_GOT20:
329 return &elf_howto_table[(int) R_390_GOT20];
330 case BFD_RELOC_390_GOTPLT20:
331 return &elf_howto_table[(int) R_390_GOTPLT20];
332 case BFD_RELOC_390_TLS_GOTIE20:
333 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
334 case BFD_RELOC_VTABLE_INHERIT:
335 return &elf32_s390_vtinherit_howto;
336 case BFD_RELOC_VTABLE_ENTRY:
337 return &elf32_s390_vtentry_howto;
338 default:
339 break;
340 }
341 return 0;
342 }
343
344 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
345 and elf32-s390.c has its own copy. */
346
347 static void
348 elf_s390_info_to_howto (abfd, cache_ptr, dst)
349 bfd *abfd ATTRIBUTE_UNUSED;
350 arelent *cache_ptr;
351 Elf_Internal_Rela *dst;
352 {
353 switch (ELF32_R_TYPE(dst->r_info))
354 {
355 case R_390_GNU_VTINHERIT:
356 cache_ptr->howto = &elf32_s390_vtinherit_howto;
357 break;
358
359 case R_390_GNU_VTENTRY:
360 cache_ptr->howto = &elf32_s390_vtentry_howto;
361 break;
362
363 default:
364 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
365 cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
366 }
367 }
368
369 /* A relocation function which doesn't do anything. */
370 static bfd_reloc_status_type
371 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
372 output_bfd, error_message)
373 bfd *abfd ATTRIBUTE_UNUSED;
374 arelent *reloc_entry;
375 asymbol *symbol ATTRIBUTE_UNUSED;
376 PTR data ATTRIBUTE_UNUSED;
377 asection *input_section;
378 bfd *output_bfd;
379 char **error_message ATTRIBUTE_UNUSED;
380 {
381 if (output_bfd)
382 reloc_entry->address += input_section->output_offset;
383 return bfd_reloc_ok;
384 }
385
386 /* Handle the large displacement relocs. */
387 static bfd_reloc_status_type
388 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
389 output_bfd, error_message)
390 bfd *abfd ATTRIBUTE_UNUSED;
391 arelent *reloc_entry;
392 asymbol *symbol;
393 PTR data ATTRIBUTE_UNUSED;
394 asection *input_section;
395 bfd *output_bfd;
396 char **error_message ATTRIBUTE_UNUSED;
397 {
398 reloc_howto_type *howto = reloc_entry->howto;
399 bfd_vma relocation;
400 bfd_vma insn;
401 bfd_size_type sz;
402
403 if (output_bfd != (bfd *) NULL
404 && (symbol->flags & BSF_SECTION_SYM) == 0
405 && (! howto->partial_inplace
406 || reloc_entry->addend == 0))
407 {
408 reloc_entry->address += input_section->output_offset;
409 return bfd_reloc_ok;
410 }
411
412 if (output_bfd != NULL)
413 return bfd_reloc_continue;
414
415 sz = input_section->rawsize ? input_section->rawsize : input_section->size;
416 if (reloc_entry->address > sz)
417 return bfd_reloc_outofrange;
418
419 relocation = (symbol->value
420 + symbol->section->output_section->vma
421 + symbol->section->output_offset);
422 relocation += reloc_entry->addend;
423 if (howto->pc_relative)
424 {
425 relocation -= (input_section->output_section->vma
426 + input_section->output_offset);
427 relocation -= reloc_entry->address;
428 }
429
430 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
431 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
432 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
433
434 if ((bfd_signed_vma) relocation < - 0x80000
435 || (bfd_signed_vma) relocation > 0x7ffff)
436 return bfd_reloc_overflow;
437 else
438 return bfd_reloc_ok;
439 }
440
441 static bfd_boolean
442 elf_s390_is_local_label_name (abfd, name)
443 bfd *abfd;
444 const char *name;
445 {
446 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
447 return TRUE;
448
449 return _bfd_elf_is_local_label_name (abfd, name);
450 }
451
452 /* Functions for the 390 ELF linker. */
453
454 /* The name of the dynamic interpreter. This is put in the .interp
455 section. */
456
457 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
458
459 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
460 copying dynamic variables from a shared lib into an app's dynbss
461 section, and instead use a dynamic relocation to point into the
462 shared lib. */
463 #define ELIMINATE_COPY_RELOCS 1
464
465 /* The size in bytes of the first entry in the procedure linkage table. */
466 #define PLT_FIRST_ENTRY_SIZE 32
467 /* The size in bytes of an entry in the procedure linkage table. */
468 #define PLT_ENTRY_SIZE 32
469
470 #define GOT_ENTRY_SIZE 4
471
472 /* The first three entries in a procedure linkage table are reserved,
473 and the initial contents are unimportant (we zero them out).
474 Subsequent entries look like this. See the SVR4 ABI 386
475 supplement to see how this works. */
476
477 /* For the s390, simple addr offset can only be 0 - 4096.
478 To use the full 2 GB address space, several instructions
479 are needed to load an address in a register and execute
480 a branch( or just saving the address)
481
482 Furthermore, only r 0 and 1 are free to use!!! */
483
484 /* The first 3 words in the GOT are then reserved.
485 Word 0 is the address of the dynamic table.
486 Word 1 is a pointer to a structure describing the object
487 Word 2 is used to point to the loader entry address.
488
489 The code for position independent PLT entries looks like this:
490
491 r12 holds addr of the current GOT at entry to the PLT
492
493 The GOT holds the address in the PLT to be executed.
494 The loader then gets:
495 24(15) = Pointer to the structure describing the object.
496 28(15) = Offset in symbol table
497
498 The loader must then find the module where the function is
499 and insert the address in the GOT.
500
501 Note: 390 can only address +- 64 K relative.
502 We check if offset > 65536, then make a relative branch -64xxx
503 back to a previous defined branch
504
505 PLT1: BASR 1,0 # 2 bytes
506 L 1,22(1) # 4 bytes Load offset in GOT in r 1
507 L 1,(1,12) # 4 bytes Load address from GOT in r1
508 BCR 15,1 # 2 bytes Jump to address
509 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
510 L 1,14(1) # 4 bytes Load offset in symol table in r1
511 BRC 15,-x # 4 bytes Jump to start of PLT
512 .word 0 # 2 bytes filler
513 .long ? # 4 bytes offset in GOT
514 .long ? # 4 bytes offset into symbol table
515
516 This was the general case. There are two additional, optimizes PLT
517 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
518 First the one for GOT offsets < 4096:
519
520 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
521 BCR 15,1 # 2 bytes Jump to address
522 .word 0,0,0 # 6 bytes filler
523 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
524 L 1,14(1) # 4 bytes Load offset in symbol table in r1
525 BRC 15,-x # 4 bytes Jump to start of PLT
526 .word 0,0,0 # 6 bytes filler
527 .long ? # 4 bytes offset into symbol table
528
529 Second the one for GOT offsets < 32768:
530
531 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
532 L 1,(1,12) # 4 bytes Load address from GOT to r1
533 BCR 15,1 # 2 bytes Jump to address
534 .word 0 # 2 bytes filler
535 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
536 L 1,14(1) # 4 bytes Load offset in symbol table in r1
537 BRC 15,-x # 4 bytes Jump to start of PLT
538 .word 0,0,0 # 6 bytes filler
539 .long ? # 4 bytes offset into symbol table
540
541 Total = 32 bytes per PLT entry
542
543 The code for static build PLT entries looks like this:
544
545 PLT1: BASR 1,0 # 2 bytes
546 L 1,22(1) # 4 bytes Load address of GOT entry
547 L 1,0(0,1) # 4 bytes Load address from GOT in r1
548 BCR 15,1 # 2 bytes Jump to address
549 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
550 L 1,14(1) # 4 bytes Load offset in symbol table in r1
551 BRC 15,-x # 4 bytes Jump to start of PLT
552 .word 0 # 2 bytes filler
553 .long ? # 4 bytes address of GOT entry
554 .long ? # 4 bytes offset into symbol table */
555
556 #define PLT_PIC_ENTRY_WORD0 0x0d105810
557 #define PLT_PIC_ENTRY_WORD1 0x10165811
558 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
559 #define PLT_PIC_ENTRY_WORD3 0x0d105810
560 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
561
562 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
563 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
564 #define PLT_PIC12_ENTRY_WORD2 0x00000000
565 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
566 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
567
568 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
569 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
570 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
571 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
572 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
573
574 #define PLT_ENTRY_WORD0 0x0d105810
575 #define PLT_ENTRY_WORD1 0x10165810
576 #define PLT_ENTRY_WORD2 0x100007f1
577 #define PLT_ENTRY_WORD3 0x0d105810
578 #define PLT_ENTRY_WORD4 0x100ea7f4
579
580 /* The first PLT entry pushes the offset into the symbol table
581 from R1 onto the stack at 8(15) and the loader object info
582 at 12(15), loads the loader address in R1 and jumps to it. */
583
584 /* The first entry in the PLT for PIC code:
585
586 PLT0:
587 ST 1,28(15) # R1 has offset into symbol table
588 L 1,4(12) # Get loader ino(object struct address)
589 ST 1,24(15) # Store address
590 L 1,8(12) # Entry address of loader in R1
591 BR 1 # Jump to loader
592
593 The first entry in the PLT for static code:
594
595 PLT0:
596 ST 1,28(15) # R1 has offset into symbol table
597 BASR 1,0
598 L 1,18(0,1) # Get address of GOT
599 MVC 24(4,15),4(1) # Move loader ino to stack
600 L 1,8(1) # Get address of loader
601 BR 1 # Jump to loader
602 .word 0 # filler
603 .long got # address of GOT */
604
605 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
606 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
607 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
608 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
609 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
610
611 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
612 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
613 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
614 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
615 #define PLT_FIRST_ENTRY_WORD4 0x58101008
616 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
617
618 /* The s390 linker needs to keep track of the number of relocs that it
619 decides to copy as dynamic relocs in check_relocs for each symbol.
620 This is so that it can later discard them if they are found to be
621 unnecessary. We store the information in a field extending the
622 regular ELF linker hash table. */
623
624 struct elf_s390_dyn_relocs
625 {
626 struct elf_s390_dyn_relocs *next;
627
628 /* The input section of the reloc. */
629 asection *sec;
630
631 /* Total number of relocs copied for the input section. */
632 bfd_size_type count;
633
634 /* Number of pc-relative relocs copied for the input section. */
635 bfd_size_type pc_count;
636 };
637
638 /* s390 ELF linker hash entry. */
639
640 struct elf_s390_link_hash_entry
641 {
642 struct elf_link_hash_entry elf;
643
644 /* Track dynamic relocs copied for this symbol. */
645 struct elf_s390_dyn_relocs *dyn_relocs;
646
647 /* Number of GOTPLT references for a function. */
648 bfd_signed_vma gotplt_refcount;
649
650 #define GOT_UNKNOWN 0
651 #define GOT_NORMAL 1
652 #define GOT_TLS_GD 2
653 #define GOT_TLS_IE 3
654 #define GOT_TLS_IE_NLT 4
655 unsigned char tls_type;
656 };
657
658 #define elf_s390_hash_entry(ent) \
659 ((struct elf_s390_link_hash_entry *)(ent))
660
661 struct elf_s390_obj_tdata
662 {
663 struct elf_obj_tdata root;
664
665 /* tls_type for each local got entry. */
666 char *local_got_tls_type;
667 };
668
669 #define elf_s390_tdata(abfd) \
670 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
671
672 #define elf_s390_local_got_tls_type(abfd) \
673 (elf_s390_tdata (abfd)->local_got_tls_type)
674
675 static bfd_boolean
676 elf_s390_mkobject (abfd)
677 bfd *abfd;
678 {
679 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
680 abfd->tdata.any = bfd_zalloc (abfd, amt);
681 if (abfd->tdata.any == NULL)
682 return FALSE;
683 return TRUE;
684 }
685
686 static bfd_boolean
687 elf_s390_object_p (abfd)
688 bfd *abfd;
689 {
690 /* Set the right machine number for an s390 elf32 file. */
691 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
692 }
693
694 /* s390 ELF linker hash table. */
695
696 struct elf_s390_link_hash_table
697 {
698 struct elf_link_hash_table elf;
699
700 /* Short-cuts to get to dynamic linker sections. */
701 asection *sgot;
702 asection *sgotplt;
703 asection *srelgot;
704 asection *splt;
705 asection *srelplt;
706 asection *sdynbss;
707 asection *srelbss;
708
709 union {
710 bfd_signed_vma refcount;
711 bfd_vma offset;
712 } tls_ldm_got;
713
714 /* Small local sym to section mapping cache. */
715 struct sym_sec_cache sym_sec;
716 };
717
718 /* Get the s390 ELF linker hash table from a link_info structure. */
719
720 #define elf_s390_hash_table(p) \
721 ((struct elf_s390_link_hash_table *) ((p)->hash))
722
723 /* Create an entry in an s390 ELF linker hash table. */
724
725 static struct bfd_hash_entry *
726 link_hash_newfunc (entry, table, string)
727 struct bfd_hash_entry *entry;
728 struct bfd_hash_table *table;
729 const char *string;
730 {
731 /* Allocate the structure if it has not already been allocated by a
732 subclass. */
733 if (entry == NULL)
734 {
735 entry = bfd_hash_allocate (table,
736 sizeof (struct elf_s390_link_hash_entry));
737 if (entry == NULL)
738 return entry;
739 }
740
741 /* Call the allocation method of the superclass. */
742 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
743 if (entry != NULL)
744 {
745 struct elf_s390_link_hash_entry *eh;
746
747 eh = (struct elf_s390_link_hash_entry *) entry;
748 eh->dyn_relocs = NULL;
749 eh->gotplt_refcount = 0;
750 eh->tls_type = GOT_UNKNOWN;
751 }
752
753 return entry;
754 }
755
756 /* Create an s390 ELF linker hash table. */
757
758 static struct bfd_link_hash_table *
759 elf_s390_link_hash_table_create (abfd)
760 bfd *abfd;
761 {
762 struct elf_s390_link_hash_table *ret;
763 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
764
765 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
766 if (ret == NULL)
767 return NULL;
768
769 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
770 {
771 free (ret);
772 return NULL;
773 }
774
775 ret->sgot = NULL;
776 ret->sgotplt = NULL;
777 ret->srelgot = NULL;
778 ret->splt = NULL;
779 ret->srelplt = NULL;
780 ret->sdynbss = NULL;
781 ret->srelbss = NULL;
782 ret->tls_ldm_got.refcount = 0;
783 ret->sym_sec.abfd = NULL;
784
785 return &ret->elf.root;
786 }
787
788 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
789 shortcuts to them in our hash table. */
790
791 static bfd_boolean
792 create_got_section (dynobj, info)
793 bfd *dynobj;
794 struct bfd_link_info *info;
795 {
796 struct elf_s390_link_hash_table *htab;
797
798 if (! _bfd_elf_create_got_section (dynobj, info))
799 return FALSE;
800
801 htab = elf_s390_hash_table (info);
802 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
803 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
804 if (!htab->sgot || !htab->sgotplt)
805 abort ();
806
807 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
808 if (htab->srelgot == NULL
809 || ! bfd_set_section_flags (dynobj, htab->srelgot,
810 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
811 | SEC_IN_MEMORY | SEC_LINKER_CREATED
812 | SEC_READONLY))
813 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
814 return FALSE;
815 return TRUE;
816 }
817
818 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
819 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
820 hash table. */
821
822 static bfd_boolean
823 elf_s390_create_dynamic_sections (dynobj, info)
824 bfd *dynobj;
825 struct bfd_link_info *info;
826 {
827 struct elf_s390_link_hash_table *htab;
828
829 htab = elf_s390_hash_table (info);
830 if (!htab->sgot && !create_got_section (dynobj, info))
831 return FALSE;
832
833 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
834 return FALSE;
835
836 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
837 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
838 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
839 if (!info->shared)
840 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
841
842 if (!htab->splt || !htab->srelplt || !htab->sdynbss
843 || (!info->shared && !htab->srelbss))
844 abort ();
845
846 return TRUE;
847 }
848
849 /* Copy the extra info we tack onto an elf_link_hash_entry. */
850
851 static void
852 elf_s390_copy_indirect_symbol (bed, dir, ind)
853 const struct elf_backend_data *bed;
854 struct elf_link_hash_entry *dir, *ind;
855 {
856 struct elf_s390_link_hash_entry *edir, *eind;
857
858 edir = (struct elf_s390_link_hash_entry *) dir;
859 eind = (struct elf_s390_link_hash_entry *) ind;
860
861 if (eind->dyn_relocs != NULL)
862 {
863 if (edir->dyn_relocs != NULL)
864 {
865 struct elf_s390_dyn_relocs **pp;
866 struct elf_s390_dyn_relocs *p;
867
868 if (ind->root.type == bfd_link_hash_indirect)
869 abort ();
870
871 /* Add reloc counts against the weak sym to the strong sym
872 list. Merge any entries against the same section. */
873 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
874 {
875 struct elf_s390_dyn_relocs *q;
876
877 for (q = edir->dyn_relocs; q != NULL; q = q->next)
878 if (q->sec == p->sec)
879 {
880 q->pc_count += p->pc_count;
881 q->count += p->count;
882 *pp = p->next;
883 break;
884 }
885 if (q == NULL)
886 pp = &p->next;
887 }
888 *pp = edir->dyn_relocs;
889 }
890
891 edir->dyn_relocs = eind->dyn_relocs;
892 eind->dyn_relocs = NULL;
893 }
894
895 if (ind->root.type == bfd_link_hash_indirect
896 && dir->got.refcount <= 0)
897 {
898 edir->tls_type = eind->tls_type;
899 eind->tls_type = GOT_UNKNOWN;
900 }
901
902 if (ELIMINATE_COPY_RELOCS
903 && ind->root.type != bfd_link_hash_indirect
904 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
905 /* If called to transfer flags for a weakdef during processing
906 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
907 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
908 dir->elf_link_hash_flags |=
909 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
910 | ELF_LINK_HASH_REF_REGULAR
911 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
912 | ELF_LINK_HASH_NEEDS_PLT));
913 else
914 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
915 }
916
917 static int
918 elf_s390_tls_transition (info, r_type, is_local)
919 struct bfd_link_info *info;
920 int r_type;
921 int is_local;
922 {
923 if (info->shared)
924 return r_type;
925
926 switch (r_type)
927 {
928 case R_390_TLS_GD32:
929 case R_390_TLS_IE32:
930 if (is_local)
931 return R_390_TLS_LE32;
932 return R_390_TLS_IE32;
933 case R_390_TLS_GOTIE32:
934 if (is_local)
935 return R_390_TLS_LE32;
936 return R_390_TLS_GOTIE32;
937 case R_390_TLS_LDM32:
938 return R_390_TLS_LE32;
939 }
940
941 return r_type;
942 }
943
944 /* Look through the relocs for a section during the first phase, and
945 allocate space in the global offset table or procedure linkage
946 table. */
947
948 static bfd_boolean
949 elf_s390_check_relocs (abfd, info, sec, relocs)
950 bfd *abfd;
951 struct bfd_link_info *info;
952 asection *sec;
953 const Elf_Internal_Rela *relocs;
954 {
955 struct elf_s390_link_hash_table *htab;
956 Elf_Internal_Shdr *symtab_hdr;
957 struct elf_link_hash_entry **sym_hashes;
958 const Elf_Internal_Rela *rel;
959 const Elf_Internal_Rela *rel_end;
960 asection *sreloc;
961 bfd_signed_vma *local_got_refcounts;
962 int tls_type, old_tls_type;
963
964 if (info->relocatable)
965 return TRUE;
966
967 htab = elf_s390_hash_table (info);
968 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
969 sym_hashes = elf_sym_hashes (abfd);
970 local_got_refcounts = elf_local_got_refcounts (abfd);
971
972 sreloc = NULL;
973
974 rel_end = relocs + sec->reloc_count;
975 for (rel = relocs; rel < rel_end; rel++)
976 {
977 unsigned int r_type;
978 unsigned long r_symndx;
979 struct elf_link_hash_entry *h;
980
981 r_symndx = ELF32_R_SYM (rel->r_info);
982
983 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
984 {
985 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
986 bfd_archive_filename (abfd),
987 r_symndx);
988 return FALSE;
989 }
990
991 if (r_symndx < symtab_hdr->sh_info)
992 h = NULL;
993 else
994 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
995
996 /* Create got section and local_got_refcounts array if they
997 are needed. */
998 r_type = elf_s390_tls_transition (info,
999 ELF32_R_TYPE (rel->r_info),
1000 h == NULL);
1001 switch (r_type)
1002 {
1003 case R_390_GOT12:
1004 case R_390_GOT16:
1005 case R_390_GOT20:
1006 case R_390_GOT32:
1007 case R_390_GOTENT:
1008 case R_390_GOTPLT12:
1009 case R_390_GOTPLT16:
1010 case R_390_GOTPLT20:
1011 case R_390_GOTPLT32:
1012 case R_390_GOTPLTENT:
1013 case R_390_TLS_GD32:
1014 case R_390_TLS_GOTIE12:
1015 case R_390_TLS_GOTIE20:
1016 case R_390_TLS_GOTIE32:
1017 case R_390_TLS_IEENT:
1018 case R_390_TLS_IE32:
1019 case R_390_TLS_LDM32:
1020 if (h == NULL
1021 && local_got_refcounts == NULL)
1022 {
1023 bfd_size_type size;
1024
1025 size = symtab_hdr->sh_info;
1026 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1027 local_got_refcounts = ((bfd_signed_vma *)
1028 bfd_zalloc (abfd, size));
1029 if (local_got_refcounts == NULL)
1030 return FALSE;
1031 elf_local_got_refcounts (abfd) = local_got_refcounts;
1032 elf_s390_local_got_tls_type (abfd)
1033 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1034 }
1035 /* Fall through. */
1036 case R_390_GOTOFF16:
1037 case R_390_GOTOFF32:
1038 case R_390_GOTPC:
1039 case R_390_GOTPCDBL:
1040 if (htab->sgot == NULL)
1041 {
1042 if (htab->elf.dynobj == NULL)
1043 htab->elf.dynobj = abfd;
1044 if (!create_got_section (htab->elf.dynobj, info))
1045 return FALSE;
1046 }
1047 }
1048
1049 switch (r_type)
1050 {
1051 case R_390_GOTOFF16:
1052 case R_390_GOTOFF32:
1053 case R_390_GOTPC:
1054 case R_390_GOTPCDBL:
1055 /* Got is created, nothing to be done. */
1056 break;
1057
1058 case R_390_PLT16DBL:
1059 case R_390_PLT32DBL:
1060 case R_390_PLT32:
1061 case R_390_PLTOFF16:
1062 case R_390_PLTOFF32:
1063 /* This symbol requires a procedure linkage table entry. We
1064 actually build the entry in adjust_dynamic_symbol,
1065 because this might be a case of linking PIC code which is
1066 never referenced by a dynamic object, in which case we
1067 don't need to generate a procedure linkage table entry
1068 after all. */
1069
1070 /* If this is a local symbol, we resolve it directly without
1071 creating a procedure linkage table entry. */
1072 if (h != NULL)
1073 {
1074 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1075 h->plt.refcount += 1;
1076 }
1077 break;
1078
1079 case R_390_GOTPLT12:
1080 case R_390_GOTPLT16:
1081 case R_390_GOTPLT20:
1082 case R_390_GOTPLT32:
1083 case R_390_GOTPLTENT:
1084 /* This symbol requires either a procedure linkage table entry
1085 or an entry in the local got. We actually build the entry
1086 in adjust_dynamic_symbol because whether this is really a
1087 global reference can change and with it the fact if we have
1088 to create a plt entry or a local got entry. To be able to
1089 make a once global symbol a local one we have to keep track
1090 of the number of gotplt references that exist for this
1091 symbol. */
1092 if (h != NULL)
1093 {
1094 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1095 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1096 h->plt.refcount += 1;
1097 }
1098 else
1099 local_got_refcounts[r_symndx] += 1;
1100 break;
1101
1102 case R_390_TLS_LDM32:
1103 htab->tls_ldm_got.refcount += 1;
1104 break;
1105
1106 case R_390_TLS_IE32:
1107 case R_390_TLS_GOTIE12:
1108 case R_390_TLS_GOTIE20:
1109 case R_390_TLS_GOTIE32:
1110 case R_390_TLS_IEENT:
1111 if (info->shared)
1112 info->flags |= DF_STATIC_TLS;
1113 /* Fall through. */
1114
1115 case R_390_GOT12:
1116 case R_390_GOT16:
1117 case R_390_GOT20:
1118 case R_390_GOT32:
1119 case R_390_GOTENT:
1120 case R_390_TLS_GD32:
1121 /* This symbol requires a global offset table entry. */
1122 switch (r_type)
1123 {
1124 default:
1125 case R_390_GOT12:
1126 case R_390_GOT16:
1127 case R_390_GOT20:
1128 case R_390_GOT32:
1129 case R_390_GOTENT:
1130 tls_type = GOT_NORMAL;
1131 break;
1132 case R_390_TLS_GD32:
1133 tls_type = GOT_TLS_GD;
1134 break;
1135 case R_390_TLS_IE32:
1136 case R_390_TLS_GOTIE32:
1137 tls_type = GOT_TLS_IE;
1138 break;
1139 case R_390_TLS_GOTIE12:
1140 case R_390_TLS_GOTIE20:
1141 case R_390_TLS_IEENT:
1142 tls_type = GOT_TLS_IE_NLT;
1143 break;
1144 }
1145
1146 if (h != NULL)
1147 {
1148 h->got.refcount += 1;
1149 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1150 }
1151 else
1152 {
1153 local_got_refcounts[r_symndx] += 1;
1154 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1155 }
1156 /* If a TLS symbol is accessed using IE at least once,
1157 there is no point to use dynamic model for it. */
1158 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1159 {
1160 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1161 {
1162 (*_bfd_error_handler)
1163 (_("%s: `%s' accessed both as normal and thread local symbol"),
1164 bfd_archive_filename (abfd), h->root.root.string);
1165 return FALSE;
1166 }
1167 if (old_tls_type > tls_type)
1168 tls_type = old_tls_type;
1169 }
1170
1171 if (old_tls_type != tls_type)
1172 {
1173 if (h != NULL)
1174 elf_s390_hash_entry (h)->tls_type = tls_type;
1175 else
1176 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1177 }
1178
1179 if (r_type != R_390_TLS_IE32)
1180 break;
1181 /* Fall through. */
1182
1183 case R_390_TLS_LE32:
1184 if (!info->shared)
1185 break;
1186 info->flags |= DF_STATIC_TLS;
1187 /* Fall through. */
1188
1189 case R_390_8:
1190 case R_390_16:
1191 case R_390_32:
1192 case R_390_PC16:
1193 case R_390_PC16DBL:
1194 case R_390_PC32DBL:
1195 case R_390_PC32:
1196 if (h != NULL && !info->shared)
1197 {
1198 /* If this reloc is in a read-only section, we might
1199 need a copy reloc. We can't check reliably at this
1200 stage whether the section is read-only, as input
1201 sections have not yet been mapped to output sections.
1202 Tentatively set the flag for now, and correct in
1203 adjust_dynamic_symbol. */
1204 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1205
1206 /* We may need a .plt entry if the function this reloc
1207 refers to is in a shared lib. */
1208 h->plt.refcount += 1;
1209 }
1210
1211 /* If we are creating a shared library, and this is a reloc
1212 against a global symbol, or a non PC relative reloc
1213 against a local symbol, then we need to copy the reloc
1214 into the shared library. However, if we are linking with
1215 -Bsymbolic, we do not need to copy a reloc against a
1216 global symbol which is defined in an object we are
1217 including in the link (i.e., DEF_REGULAR is set). At
1218 this point we have not seen all the input files, so it is
1219 possible that DEF_REGULAR is not set now but will be set
1220 later (it is never cleared). In case of a weak definition,
1221 DEF_REGULAR may be cleared later by a strong definition in
1222 a shared library. We account for that possibility below by
1223 storing information in the relocs_copied field of the hash
1224 table entry. A similar situation occurs when creating
1225 shared libraries and symbol visibility changes render the
1226 symbol local.
1227
1228 If on the other hand, we are creating an executable, we
1229 may need to keep relocations for symbols satisfied by a
1230 dynamic library if we manage to avoid copy relocs for the
1231 symbol. */
1232 if ((info->shared
1233 && (sec->flags & SEC_ALLOC) != 0
1234 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1235 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1236 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1237 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1238 || (h != NULL
1239 && (! info->symbolic
1240 || h->root.type == bfd_link_hash_defweak
1241 || (h->elf_link_hash_flags
1242 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1243 || (ELIMINATE_COPY_RELOCS
1244 && !info->shared
1245 && (sec->flags & SEC_ALLOC) != 0
1246 && h != NULL
1247 && (h->root.type == bfd_link_hash_defweak
1248 || (h->elf_link_hash_flags
1249 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1250 {
1251 struct elf_s390_dyn_relocs *p;
1252 struct elf_s390_dyn_relocs **head;
1253
1254 /* We must copy these reloc types into the output file.
1255 Create a reloc section in dynobj and make room for
1256 this reloc. */
1257 if (sreloc == NULL)
1258 {
1259 const char *name;
1260 bfd *dynobj;
1261
1262 name = (bfd_elf_string_from_elf_section
1263 (abfd,
1264 elf_elfheader (abfd)->e_shstrndx,
1265 elf_section_data (sec)->rel_hdr.sh_name));
1266 if (name == NULL)
1267 return FALSE;
1268
1269 if (strncmp (name, ".rela", 5) != 0
1270 || strcmp (bfd_get_section_name (abfd, sec),
1271 name + 5) != 0)
1272 {
1273 (*_bfd_error_handler)
1274 (_("%s: bad relocation section name `%s\'"),
1275 bfd_archive_filename (abfd), name);
1276 }
1277
1278 if (htab->elf.dynobj == NULL)
1279 htab->elf.dynobj = abfd;
1280
1281 dynobj = htab->elf.dynobj;
1282 sreloc = bfd_get_section_by_name (dynobj, name);
1283 if (sreloc == NULL)
1284 {
1285 flagword flags;
1286
1287 sreloc = bfd_make_section (dynobj, name);
1288 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1289 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1290 if ((sec->flags & SEC_ALLOC) != 0)
1291 flags |= SEC_ALLOC | SEC_LOAD;
1292 if (sreloc == NULL
1293 || ! bfd_set_section_flags (dynobj, sreloc, flags)
1294 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1295 return FALSE;
1296 }
1297 elf_section_data (sec)->sreloc = sreloc;
1298 }
1299
1300 /* If this is a global symbol, we count the number of
1301 relocations we need for this symbol. */
1302 if (h != NULL)
1303 {
1304 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1305 }
1306 else
1307 {
1308 /* Track dynamic relocs needed for local syms too.
1309 We really need local syms available to do this
1310 easily. Oh well. */
1311 asection *s;
1312
1313 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1314 sec, r_symndx);
1315 if (s == NULL)
1316 return FALSE;
1317
1318 head = ((struct elf_s390_dyn_relocs **)
1319 &elf_section_data (s)->local_dynrel);
1320 }
1321
1322 p = *head;
1323 if (p == NULL || p->sec != sec)
1324 {
1325 bfd_size_type amt = sizeof *p;
1326
1327 p = ((struct elf_s390_dyn_relocs *)
1328 bfd_alloc (htab->elf.dynobj, amt));
1329 if (p == NULL)
1330 return FALSE;
1331 p->next = *head;
1332 *head = p;
1333 p->sec = sec;
1334 p->count = 0;
1335 p->pc_count = 0;
1336 }
1337
1338 p->count += 1;
1339 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1340 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1341 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1342 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1343 p->pc_count += 1;
1344 }
1345 break;
1346
1347 /* This relocation describes the C++ object vtable hierarchy.
1348 Reconstruct it for later use during GC. */
1349 case R_390_GNU_VTINHERIT:
1350 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1351 return FALSE;
1352 break;
1353
1354 /* This relocation describes which C++ vtable entries are actually
1355 used. Record for later use during GC. */
1356 case R_390_GNU_VTENTRY:
1357 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1358 return FALSE;
1359 break;
1360
1361 default:
1362 break;
1363 }
1364 }
1365
1366 return TRUE;
1367 }
1368
1369 /* Return the section that should be marked against GC for a given
1370 relocation. */
1371
1372 static asection *
1373 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1374 asection *sec;
1375 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1376 Elf_Internal_Rela *rel;
1377 struct elf_link_hash_entry *h;
1378 Elf_Internal_Sym *sym;
1379 {
1380 if (h != NULL)
1381 {
1382 switch (ELF32_R_TYPE (rel->r_info))
1383 {
1384 case R_390_GNU_VTINHERIT:
1385 case R_390_GNU_VTENTRY:
1386 break;
1387
1388 default:
1389 switch (h->root.type)
1390 {
1391 case bfd_link_hash_defined:
1392 case bfd_link_hash_defweak:
1393 return h->root.u.def.section;
1394
1395 case bfd_link_hash_common:
1396 return h->root.u.c.p->section;
1397
1398 default:
1399 break;
1400 }
1401 }
1402 }
1403 else
1404 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1405
1406 return NULL;
1407 }
1408
1409 /* Update the got entry reference counts for the section being removed. */
1410
1411 static bfd_boolean
1412 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1413 bfd *abfd;
1414 struct bfd_link_info *info;
1415 asection *sec;
1416 const Elf_Internal_Rela *relocs;
1417 {
1418 Elf_Internal_Shdr *symtab_hdr;
1419 struct elf_link_hash_entry **sym_hashes;
1420 bfd_signed_vma *local_got_refcounts;
1421 const Elf_Internal_Rela *rel, *relend;
1422
1423 elf_section_data (sec)->local_dynrel = NULL;
1424
1425 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1426 sym_hashes = elf_sym_hashes (abfd);
1427 local_got_refcounts = elf_local_got_refcounts (abfd);
1428
1429 relend = relocs + sec->reloc_count;
1430 for (rel = relocs; rel < relend; rel++)
1431 {
1432 unsigned long r_symndx;
1433 unsigned int r_type;
1434 struct elf_link_hash_entry *h = NULL;
1435
1436 r_symndx = ELF32_R_SYM (rel->r_info);
1437 if (r_symndx >= symtab_hdr->sh_info)
1438 {
1439 struct elf_s390_link_hash_entry *eh;
1440 struct elf_s390_dyn_relocs **pp;
1441 struct elf_s390_dyn_relocs *p;
1442
1443 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1444 eh = (struct elf_s390_link_hash_entry *) h;
1445
1446 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1447 if (p->sec == sec)
1448 {
1449 /* Everything must go for SEC. */
1450 *pp = p->next;
1451 break;
1452 }
1453 }
1454
1455 r_type = ELF32_R_TYPE (rel->r_info);
1456 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1457 switch (r_type)
1458 {
1459 case R_390_TLS_LDM32:
1460 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1461 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1462 break;
1463
1464 case R_390_TLS_GD32:
1465 case R_390_TLS_IE32:
1466 case R_390_TLS_GOTIE12:
1467 case R_390_TLS_GOTIE20:
1468 case R_390_TLS_GOTIE32:
1469 case R_390_TLS_IEENT:
1470 case R_390_GOT12:
1471 case R_390_GOT16:
1472 case R_390_GOT20:
1473 case R_390_GOT32:
1474 case R_390_GOTOFF16:
1475 case R_390_GOTOFF32:
1476 case R_390_GOTPC:
1477 case R_390_GOTPCDBL:
1478 case R_390_GOTENT:
1479 if (h != NULL)
1480 {
1481 if (h->got.refcount > 0)
1482 h->got.refcount -= 1;
1483 }
1484 else if (local_got_refcounts != NULL)
1485 {
1486 if (local_got_refcounts[r_symndx] > 0)
1487 local_got_refcounts[r_symndx] -= 1;
1488 }
1489 break;
1490
1491 case R_390_8:
1492 case R_390_12:
1493 case R_390_16:
1494 case R_390_20:
1495 case R_390_32:
1496 case R_390_PC16:
1497 case R_390_PC16DBL:
1498 case R_390_PC32DBL:
1499 case R_390_PC32:
1500 if (info->shared)
1501 break;
1502 /* Fall through. */
1503
1504 case R_390_PLT16DBL:
1505 case R_390_PLT32DBL:
1506 case R_390_PLT32:
1507 case R_390_PLTOFF16:
1508 case R_390_PLTOFF32:
1509 if (h != NULL)
1510 {
1511 if (h->plt.refcount > 0)
1512 h->plt.refcount -= 1;
1513 }
1514 break;
1515
1516 case R_390_GOTPLT12:
1517 case R_390_GOTPLT16:
1518 case R_390_GOTPLT20:
1519 case R_390_GOTPLT32:
1520 case R_390_GOTPLTENT:
1521 if (h != NULL)
1522 {
1523 if (h->plt.refcount > 0)
1524 {
1525 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1526 h->plt.refcount -= 1;
1527 }
1528 }
1529 else if (local_got_refcounts != NULL)
1530 {
1531 if (local_got_refcounts[r_symndx] > 0)
1532 local_got_refcounts[r_symndx] -= 1;
1533 }
1534 break;
1535
1536 default:
1537 break;
1538 }
1539 }
1540
1541 return TRUE;
1542 }
1543
1544 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1545 entry but we found we will not create any. Called when we find we will
1546 not have any PLT for this symbol, by for example
1547 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1548 or elf_s390_size_dynamic_sections if no dynamic sections will be
1549 created (we're only linking static objects). */
1550
1551 static void
1552 elf_s390_adjust_gotplt (h)
1553 struct elf_s390_link_hash_entry *h;
1554 {
1555 if (h->elf.root.type == bfd_link_hash_warning)
1556 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1557
1558 if (h->gotplt_refcount <= 0)
1559 return;
1560
1561 /* We simply add the number of gotplt references to the number
1562 * of got references for this symbol. */
1563 h->elf.got.refcount += h->gotplt_refcount;
1564 h->gotplt_refcount = -1;
1565 }
1566
1567 /* Adjust a symbol defined by a dynamic object and referenced by a
1568 regular object. The current definition is in some section of the
1569 dynamic object, but we're not including those sections. We have to
1570 change the definition to something the rest of the link can
1571 understand. */
1572
1573 static bfd_boolean
1574 elf_s390_adjust_dynamic_symbol (info, h)
1575 struct bfd_link_info *info;
1576 struct elf_link_hash_entry *h;
1577 {
1578 struct elf_s390_link_hash_table *htab;
1579 asection *s;
1580 unsigned int power_of_two;
1581
1582 /* If this is a function, put it in the procedure linkage table. We
1583 will fill in the contents of the procedure linkage table later
1584 (although we could actually do it here). */
1585 if (h->type == STT_FUNC
1586 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1587 {
1588 if (h->plt.refcount <= 0
1589 || (! info->shared
1590 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
1591 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1592 && h->root.type != bfd_link_hash_undefweak
1593 && h->root.type != bfd_link_hash_undefined))
1594 {
1595 /* This case can occur if we saw a PLT32 reloc in an input
1596 file, but the symbol was never referred to by a dynamic
1597 object, or if all references were garbage collected. In
1598 such a case, we don't actually need to build a procedure
1599 linkage table, and we can just do a PC32 reloc instead. */
1600 h->plt.offset = (bfd_vma) -1;
1601 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1602 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1603 }
1604
1605 return TRUE;
1606 }
1607 else
1608 /* It's possible that we incorrectly decided a .plt reloc was
1609 needed for an R_390_PC32 reloc to a non-function sym in
1610 check_relocs. We can't decide accurately between function and
1611 non-function syms in check-relocs; Objects loaded later in
1612 the link may change h->type. So fix it now. */
1613 h->plt.offset = (bfd_vma) -1;
1614
1615 /* If this is a weak symbol, and there is a real definition, the
1616 processor independent code will have arranged for us to see the
1617 real definition first, and we can just use the same value. */
1618 if (h->weakdef != NULL)
1619 {
1620 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1621 || h->weakdef->root.type == bfd_link_hash_defweak);
1622 h->root.u.def.section = h->weakdef->root.u.def.section;
1623 h->root.u.def.value = h->weakdef->root.u.def.value;
1624 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1625 h->elf_link_hash_flags
1626 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1627 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
1628 return TRUE;
1629 }
1630
1631 /* This is a reference to a symbol defined by a dynamic object which
1632 is not a function. */
1633
1634 /* If we are creating a shared library, we must presume that the
1635 only references to the symbol are via the global offset table.
1636 For such cases we need not do anything here; the relocations will
1637 be handled correctly by relocate_section. */
1638 if (info->shared)
1639 return TRUE;
1640
1641 /* If there are no references to this symbol that do not use the
1642 GOT, we don't need to generate a copy reloc. */
1643 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1644 return TRUE;
1645
1646 /* If -z nocopyreloc was given, we won't generate them either. */
1647 if (info->nocopyreloc)
1648 {
1649 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1650 return TRUE;
1651 }
1652
1653 if (ELIMINATE_COPY_RELOCS)
1654 {
1655 struct elf_s390_link_hash_entry * eh;
1656 struct elf_s390_dyn_relocs *p;
1657
1658 eh = (struct elf_s390_link_hash_entry *) h;
1659 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1660 {
1661 s = p->sec->output_section;
1662 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1663 break;
1664 }
1665
1666 /* If we didn't find any dynamic relocs in read-only sections, then
1667 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1668 if (p == NULL)
1669 {
1670 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1671 return TRUE;
1672 }
1673 }
1674
1675 /* We must allocate the symbol in our .dynbss section, which will
1676 become part of the .bss section of the executable. There will be
1677 an entry for this symbol in the .dynsym section. The dynamic
1678 object will contain position independent code, so all references
1679 from the dynamic object to this symbol will go through the global
1680 offset table. The dynamic linker will use the .dynsym entry to
1681 determine the address it must put in the global offset table, so
1682 both the dynamic object and the regular object will refer to the
1683 same memory location for the variable. */
1684
1685 htab = elf_s390_hash_table (info);
1686
1687 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1688 copy the initial value out of the dynamic object and into the
1689 runtime process image. */
1690 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1691 {
1692 htab->srelbss->size += sizeof (Elf32_External_Rela);
1693 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1694 }
1695
1696 /* We need to figure out the alignment required for this symbol. I
1697 have no idea how ELF linkers handle this. */
1698 power_of_two = bfd_log2 (h->size);
1699 if (power_of_two > 3)
1700 power_of_two = 3;
1701
1702 /* Apply the required alignment. */
1703 s = htab->sdynbss;
1704 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1705 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1706 {
1707 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1708 return FALSE;
1709 }
1710
1711 /* Define the symbol as being at this point in the section. */
1712 h->root.u.def.section = s;
1713 h->root.u.def.value = s->size;
1714
1715 /* Increment the section size to make room for the symbol. */
1716 s->size += h->size;
1717
1718 return TRUE;
1719 }
1720
1721 /* Allocate space in .plt, .got and associated reloc sections for
1722 dynamic relocs. */
1723
1724 static bfd_boolean
1725 allocate_dynrelocs (h, inf)
1726 struct elf_link_hash_entry *h;
1727 PTR inf;
1728 {
1729 struct bfd_link_info *info;
1730 struct elf_s390_link_hash_table *htab;
1731 struct elf_s390_link_hash_entry *eh;
1732 struct elf_s390_dyn_relocs *p;
1733
1734 if (h->root.type == bfd_link_hash_indirect)
1735 return TRUE;
1736
1737 if (h->root.type == bfd_link_hash_warning)
1738 /* When warning symbols are created, they **replace** the "real"
1739 entry in the hash table, thus we never get to see the real
1740 symbol in a hash traversal. So look at it now. */
1741 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1742
1743 info = (struct bfd_link_info *) inf;
1744 htab = elf_s390_hash_table (info);
1745
1746 if (htab->elf.dynamic_sections_created
1747 && h->plt.refcount > 0
1748 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1749 || h->root.type != bfd_link_hash_undefweak))
1750 {
1751 /* Make sure this symbol is output as a dynamic symbol.
1752 Undefined weak syms won't yet be marked as dynamic. */
1753 if (h->dynindx == -1
1754 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1755 {
1756 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1757 return FALSE;
1758 }
1759
1760 if (info->shared
1761 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1762 {
1763 asection *s = htab->splt;
1764
1765 /* If this is the first .plt entry, make room for the special
1766 first entry. */
1767 if (s->size == 0)
1768 s->size += PLT_FIRST_ENTRY_SIZE;
1769
1770 h->plt.offset = s->size;
1771
1772 /* If this symbol is not defined in a regular file, and we are
1773 not generating a shared library, then set the symbol to this
1774 location in the .plt. This is required to make function
1775 pointers compare as equal between the normal executable and
1776 the shared library. */
1777 if (! info->shared
1778 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1779 {
1780 h->root.u.def.section = s;
1781 h->root.u.def.value = h->plt.offset;
1782 }
1783
1784 /* Make room for this entry. */
1785 s->size += PLT_ENTRY_SIZE;
1786
1787 /* We also need to make an entry in the .got.plt section, which
1788 will be placed in the .got section by the linker script. */
1789 htab->sgotplt->size += GOT_ENTRY_SIZE;
1790
1791 /* We also need to make an entry in the .rela.plt section. */
1792 htab->srelplt->size += sizeof (Elf32_External_Rela);
1793 }
1794 else
1795 {
1796 h->plt.offset = (bfd_vma) -1;
1797 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1798 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1799 }
1800 }
1801 else
1802 {
1803 h->plt.offset = (bfd_vma) -1;
1804 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1805 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1806 }
1807
1808 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1809 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1810 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1811 we can save the dynamic TLS relocation. */
1812 if (h->got.refcount > 0
1813 && !info->shared
1814 && h->dynindx == -1
1815 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1816 {
1817 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1818 /* For the GOTIE access without a literal pool entry the offset has
1819 to be stored somewhere. The immediate value in the instruction
1820 is not bit enough so the value is stored in the got. */
1821 {
1822 h->got.offset = htab->sgot->size;
1823 htab->sgot->size += GOT_ENTRY_SIZE;
1824 }
1825 else
1826 h->got.offset = (bfd_vma) -1;
1827 }
1828 else if (h->got.refcount > 0)
1829 {
1830 asection *s;
1831 bfd_boolean dyn;
1832 int tls_type = elf_s390_hash_entry(h)->tls_type;
1833
1834 /* Make sure this symbol is output as a dynamic symbol.
1835 Undefined weak syms won't yet be marked as dynamic. */
1836 if (h->dynindx == -1
1837 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1838 {
1839 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1840 return FALSE;
1841 }
1842
1843 s = htab->sgot;
1844 h->got.offset = s->size;
1845 s->size += GOT_ENTRY_SIZE;
1846 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1847 if (tls_type == GOT_TLS_GD)
1848 s->size += GOT_ENTRY_SIZE;
1849 dyn = htab->elf.dynamic_sections_created;
1850 /* R_390_TLS_IE32 needs one dynamic relocation,
1851 R_390_TLS_GD32 needs one if local symbol and two if global. */
1852 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1853 || tls_type >= GOT_TLS_IE)
1854 htab->srelgot->size += sizeof (Elf32_External_Rela);
1855 else if (tls_type == GOT_TLS_GD)
1856 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1857 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1858 || h->root.type != bfd_link_hash_undefweak)
1859 && (info->shared
1860 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1861 htab->srelgot->size += sizeof (Elf32_External_Rela);
1862 }
1863 else
1864 h->got.offset = (bfd_vma) -1;
1865
1866 eh = (struct elf_s390_link_hash_entry *) h;
1867 if (eh->dyn_relocs == NULL)
1868 return TRUE;
1869
1870 /* In the shared -Bsymbolic case, discard space allocated for
1871 dynamic pc-relative relocs against symbols which turn out to be
1872 defined in regular objects. For the normal shared case, discard
1873 space for pc-relative relocs that have become local due to symbol
1874 visibility changes. */
1875
1876 if (info->shared)
1877 {
1878 if (SYMBOL_REFERENCES_LOCAL (info, h))
1879 {
1880 struct elf_s390_dyn_relocs **pp;
1881
1882 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1883 {
1884 p->count -= p->pc_count;
1885 p->pc_count = 0;
1886 if (p->count == 0)
1887 *pp = p->next;
1888 else
1889 pp = &p->next;
1890 }
1891 }
1892
1893 /* Also discard relocs on undefined weak syms with non-default
1894 visibility. */
1895 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1896 && h->root.type == bfd_link_hash_undefweak)
1897 eh->dyn_relocs = NULL;
1898 }
1899 else if (ELIMINATE_COPY_RELOCS)
1900 {
1901 /* For the non-shared case, discard space for relocs against
1902 symbols which turn out to need copy relocs or are not
1903 dynamic. */
1904
1905 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1906 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1907 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1908 || (htab->elf.dynamic_sections_created
1909 && (h->root.type == bfd_link_hash_undefweak
1910 || h->root.type == bfd_link_hash_undefined))))
1911 {
1912 /* Make sure this symbol is output as a dynamic symbol.
1913 Undefined weak syms won't yet be marked as dynamic. */
1914 if (h->dynindx == -1
1915 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1916 {
1917 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1918 return FALSE;
1919 }
1920
1921 /* If that succeeded, we know we'll be keeping all the
1922 relocs. */
1923 if (h->dynindx != -1)
1924 goto keep;
1925 }
1926
1927 eh->dyn_relocs = NULL;
1928
1929 keep: ;
1930 }
1931
1932 /* Finally, allocate space. */
1933 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1934 {
1935 asection *sreloc = elf_section_data (p->sec)->sreloc;
1936
1937 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1938 }
1939
1940 return TRUE;
1941 }
1942
1943 /* Find any dynamic relocs that apply to read-only sections. */
1944
1945 static bfd_boolean
1946 readonly_dynrelocs (h, inf)
1947 struct elf_link_hash_entry *h;
1948 PTR inf;
1949 {
1950 struct elf_s390_link_hash_entry *eh;
1951 struct elf_s390_dyn_relocs *p;
1952
1953 if (h->root.type == bfd_link_hash_warning)
1954 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1955
1956 eh = (struct elf_s390_link_hash_entry *) h;
1957 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1958 {
1959 asection *s = p->sec->output_section;
1960
1961 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1962 {
1963 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1964
1965 info->flags |= DF_TEXTREL;
1966
1967 /* Not an error, just cut short the traversal. */
1968 return FALSE;
1969 }
1970 }
1971 return TRUE;
1972 }
1973
1974 /* Set the sizes of the dynamic sections. */
1975
1976 static bfd_boolean
1977 elf_s390_size_dynamic_sections (output_bfd, info)
1978 bfd *output_bfd ATTRIBUTE_UNUSED;
1979 struct bfd_link_info *info;
1980 {
1981 struct elf_s390_link_hash_table *htab;
1982 bfd *dynobj;
1983 asection *s;
1984 bfd_boolean relocs;
1985 bfd *ibfd;
1986
1987 htab = elf_s390_hash_table (info);
1988 dynobj = htab->elf.dynobj;
1989 if (dynobj == NULL)
1990 abort ();
1991
1992 if (htab->elf.dynamic_sections_created)
1993 {
1994 /* Set the contents of the .interp section to the interpreter. */
1995 if (info->executable)
1996 {
1997 s = bfd_get_section_by_name (dynobj, ".interp");
1998 if (s == NULL)
1999 abort ();
2000 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2001 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2002 }
2003 }
2004
2005 /* Set up .got offsets for local syms, and space for local dynamic
2006 relocs. */
2007 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2008 {
2009 bfd_signed_vma *local_got;
2010 bfd_signed_vma *end_local_got;
2011 char *local_tls_type;
2012 bfd_size_type locsymcount;
2013 Elf_Internal_Shdr *symtab_hdr;
2014 asection *srela;
2015
2016 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2017 continue;
2018
2019 for (s = ibfd->sections; s != NULL; s = s->next)
2020 {
2021 struct elf_s390_dyn_relocs *p;
2022
2023 for (p = *((struct elf_s390_dyn_relocs **)
2024 &elf_section_data (s)->local_dynrel);
2025 p != NULL;
2026 p = p->next)
2027 {
2028 if (!bfd_is_abs_section (p->sec)
2029 && bfd_is_abs_section (p->sec->output_section))
2030 {
2031 /* Input section has been discarded, either because
2032 it is a copy of a linkonce section or due to
2033 linker script /DISCARD/, so we'll be discarding
2034 the relocs too. */
2035 }
2036 else if (p->count != 0)
2037 {
2038 srela = elf_section_data (p->sec)->sreloc;
2039 srela->size += p->count * sizeof (Elf32_External_Rela);
2040 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2041 info->flags |= DF_TEXTREL;
2042 }
2043 }
2044 }
2045
2046 local_got = elf_local_got_refcounts (ibfd);
2047 if (!local_got)
2048 continue;
2049
2050 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2051 locsymcount = symtab_hdr->sh_info;
2052 end_local_got = local_got + locsymcount;
2053 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2054 s = htab->sgot;
2055 srela = htab->srelgot;
2056 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2057 {
2058 if (*local_got > 0)
2059 {
2060 *local_got = s->size;
2061 s->size += GOT_ENTRY_SIZE;
2062 if (*local_tls_type == GOT_TLS_GD)
2063 s->size += GOT_ENTRY_SIZE;
2064 if (info->shared)
2065 srela->size += sizeof (Elf32_External_Rela);
2066 }
2067 else
2068 *local_got = (bfd_vma) -1;
2069 }
2070 }
2071
2072 if (htab->tls_ldm_got.refcount > 0)
2073 {
2074 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2075 relocs. */
2076 htab->tls_ldm_got.offset = htab->sgot->size;
2077 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2078 htab->srelgot->size += sizeof (Elf32_External_Rela);
2079 }
2080 else
2081 htab->tls_ldm_got.offset = -1;
2082
2083 /* Allocate global sym .plt and .got entries, and space for global
2084 sym dynamic relocs. */
2085 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2086
2087 /* We now have determined the sizes of the various dynamic sections.
2088 Allocate memory for them. */
2089 relocs = FALSE;
2090 for (s = dynobj->sections; s != NULL; s = s->next)
2091 {
2092 if ((s->flags & SEC_LINKER_CREATED) == 0)
2093 continue;
2094
2095 if (s == htab->splt
2096 || s == htab->sgot
2097 || s == htab->sgotplt)
2098 {
2099 /* Strip this section if we don't need it; see the
2100 comment below. */
2101 }
2102 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2103 {
2104 if (s->size != 0)
2105 relocs = TRUE;
2106
2107 /* We use the reloc_count field as a counter if we need
2108 to copy relocs into the output file. */
2109 s->reloc_count = 0;
2110 }
2111 else
2112 {
2113 /* It's not one of our sections, so don't allocate space. */
2114 continue;
2115 }
2116
2117 if (s->size == 0)
2118 {
2119 /* If we don't need this section, strip it from the
2120 output file. This is to handle .rela.bss and
2121 .rela.plt. We must create it in
2122 create_dynamic_sections, because it must be created
2123 before the linker maps input sections to output
2124 sections. The linker does that before
2125 adjust_dynamic_symbol is called, and it is that
2126 function which decides whether anything needs to go
2127 into these sections. */
2128
2129 _bfd_strip_section_from_output (info, s);
2130 continue;
2131 }
2132
2133 /* Allocate memory for the section contents. We use bfd_zalloc
2134 here in case unused entries are not reclaimed before the
2135 section's contents are written out. This should not happen,
2136 but this way if it does, we get a R_390_NONE reloc instead
2137 of garbage. */
2138 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2139 if (s->contents == NULL)
2140 return FALSE;
2141 }
2142
2143 if (htab->elf.dynamic_sections_created)
2144 {
2145 /* Add some entries to the .dynamic section. We fill in the
2146 values later, in elf_s390_finish_dynamic_sections, but we
2147 must add the entries now so that we get the correct size for
2148 the .dynamic section. The DT_DEBUG entry is filled in by the
2149 dynamic linker and used by the debugger. */
2150 #define add_dynamic_entry(TAG, VAL) \
2151 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2152
2153 if (info->executable)
2154 {
2155 if (!add_dynamic_entry (DT_DEBUG, 0))
2156 return FALSE;
2157 }
2158
2159 if (htab->splt->size != 0)
2160 {
2161 if (!add_dynamic_entry (DT_PLTGOT, 0)
2162 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2163 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2164 || !add_dynamic_entry (DT_JMPREL, 0))
2165 return FALSE;
2166 }
2167
2168 if (relocs)
2169 {
2170 if (!add_dynamic_entry (DT_RELA, 0)
2171 || !add_dynamic_entry (DT_RELASZ, 0)
2172 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2173 return FALSE;
2174
2175 /* If any dynamic relocs apply to a read-only section,
2176 then we need a DT_TEXTREL entry. */
2177 if ((info->flags & DF_TEXTREL) == 0)
2178 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2179 (PTR) info);
2180
2181 if ((info->flags & DF_TEXTREL) != 0)
2182 {
2183 if (!add_dynamic_entry (DT_TEXTREL, 0))
2184 return FALSE;
2185 }
2186 }
2187 }
2188 #undef add_dynamic_entry
2189
2190 return TRUE;
2191 }
2192
2193 /* Return the base VMA address which should be subtracted from real addresses
2194 when resolving @dtpoff relocation.
2195 This is PT_TLS segment p_vaddr. */
2196
2197 static bfd_vma
2198 dtpoff_base (info)
2199 struct bfd_link_info *info;
2200 {
2201 /* If tls_sec is NULL, we should have signalled an error already. */
2202 if (elf_hash_table (info)->tls_sec == NULL)
2203 return 0;
2204 return elf_hash_table (info)->tls_sec->vma;
2205 }
2206
2207 /* Return the relocation value for @tpoff relocation
2208 if STT_TLS virtual address is ADDRESS. */
2209
2210 static bfd_vma
2211 tpoff (info, address)
2212 struct bfd_link_info *info;
2213 bfd_vma address;
2214 {
2215 struct elf_link_hash_table *htab = elf_hash_table (info);
2216
2217 /* If tls_sec is NULL, we should have signalled an error already. */
2218 if (htab->tls_sec == NULL)
2219 return 0;
2220 return htab->tls_size + htab->tls_sec->vma - address;
2221 }
2222
2223 /* Complain if TLS instruction relocation is against an invalid
2224 instruction. */
2225
2226 static void
2227 invalid_tls_insn (input_bfd, input_section, rel)
2228 bfd *input_bfd;
2229 asection *input_section;
2230 Elf_Internal_Rela *rel;
2231 {
2232 reloc_howto_type *howto;
2233
2234 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2235 (*_bfd_error_handler)
2236 (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"),
2237 bfd_archive_filename (input_bfd),
2238 bfd_get_section_name (input_bfd, input_section),
2239 (long) rel->r_offset,
2240 howto->name);
2241 }
2242
2243 /* Relocate a 390 ELF section. */
2244
2245 static bfd_boolean
2246 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2247 contents, relocs, local_syms, local_sections)
2248 bfd *output_bfd;
2249 struct bfd_link_info *info;
2250 bfd *input_bfd;
2251 asection *input_section;
2252 bfd_byte *contents;
2253 Elf_Internal_Rela *relocs;
2254 Elf_Internal_Sym *local_syms;
2255 asection **local_sections;
2256 {
2257 struct elf_s390_link_hash_table *htab;
2258 Elf_Internal_Shdr *symtab_hdr;
2259 struct elf_link_hash_entry **sym_hashes;
2260 bfd_vma *local_got_offsets;
2261 Elf_Internal_Rela *rel;
2262 Elf_Internal_Rela *relend;
2263
2264 if (info->relocatable)
2265 return TRUE;
2266
2267 htab = elf_s390_hash_table (info);
2268 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2269 sym_hashes = elf_sym_hashes (input_bfd);
2270 local_got_offsets = elf_local_got_offsets (input_bfd);
2271
2272 rel = relocs;
2273 relend = relocs + input_section->reloc_count;
2274 for (; rel < relend; rel++)
2275 {
2276 unsigned int r_type;
2277 reloc_howto_type *howto;
2278 unsigned long r_symndx;
2279 struct elf_link_hash_entry *h;
2280 Elf_Internal_Sym *sym;
2281 asection *sec;
2282 bfd_vma off;
2283 bfd_vma relocation;
2284 bfd_boolean unresolved_reloc;
2285 bfd_reloc_status_type r;
2286 int tls_type;
2287
2288 r_type = ELF32_R_TYPE (rel->r_info);
2289 if (r_type == (int) R_390_GNU_VTINHERIT
2290 || r_type == (int) R_390_GNU_VTENTRY)
2291 continue;
2292 if (r_type >= (int) R_390_max)
2293 {
2294 bfd_set_error (bfd_error_bad_value);
2295 return FALSE;
2296 }
2297
2298 howto = elf_howto_table + r_type;
2299 r_symndx = ELF32_R_SYM (rel->r_info);
2300
2301 /* This is a final link. */
2302 h = NULL;
2303 sym = NULL;
2304 sec = NULL;
2305 unresolved_reloc = FALSE;
2306 if (r_symndx < symtab_hdr->sh_info)
2307 {
2308 sym = local_syms + r_symndx;
2309 sec = local_sections[r_symndx];
2310 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2311 }
2312 else
2313 {
2314 bfd_boolean warned ATTRIBUTE_UNUSED;
2315
2316 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2317 r_symndx, symtab_hdr, sym_hashes,
2318 h, sec, relocation,
2319 unresolved_reloc, warned);
2320 }
2321
2322 switch (r_type)
2323 {
2324 case R_390_GOTPLT12:
2325 case R_390_GOTPLT16:
2326 case R_390_GOTPLT20:
2327 case R_390_GOTPLT32:
2328 case R_390_GOTPLTENT:
2329 /* There are three cases for a GOTPLT relocation. 1) The
2330 relocation is against the jump slot entry of a plt that
2331 will get emitted to the output file. 2) The relocation
2332 is against the jump slot of a plt entry that has been
2333 removed. elf_s390_adjust_gotplt has created a GOT entry
2334 as replacement. 3) The relocation is against a local symbol.
2335 Cases 2) and 3) are the same as the GOT relocation code
2336 so we just have to test for case 1 and fall through for
2337 the other two. */
2338 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2339 {
2340 bfd_vma plt_index;
2341
2342 /* Calc. index no.
2343 Current offset - size first entry / entry size. */
2344 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2345 PLT_ENTRY_SIZE;
2346
2347 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2348 addr & GOT addr. */
2349 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2350 unresolved_reloc = FALSE;
2351
2352 if (r_type == R_390_GOTPLTENT)
2353 relocation += htab->sgot->output_section->vma;
2354 break;
2355 }
2356 /* Fall through. */
2357
2358 case R_390_GOT12:
2359 case R_390_GOT16:
2360 case R_390_GOT20:
2361 case R_390_GOT32:
2362 case R_390_GOTENT:
2363 /* Relocation is to the entry for this symbol in the global
2364 offset table. */
2365 if (htab->sgot == NULL)
2366 abort ();
2367
2368 if (h != NULL)
2369 {
2370 bfd_boolean dyn;
2371
2372 off = h->got.offset;
2373 dyn = htab->elf.dynamic_sections_created;
2374 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2375 || (info->shared
2376 && (info->symbolic
2377 || h->dynindx == -1
2378 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2379 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2380 || (ELF_ST_VISIBILITY (h->other)
2381 && h->root.type == bfd_link_hash_undefweak))
2382 {
2383 /* This is actually a static link, or it is a
2384 -Bsymbolic link and the symbol is defined
2385 locally, or the symbol was forced to be local
2386 because of a version file. We must initialize
2387 this entry in the global offset table. Since the
2388 offset must always be a multiple of 2, we use the
2389 least significant bit to record whether we have
2390 initialized it already.
2391
2392 When doing a dynamic link, we create a .rel.got
2393 relocation entry to initialize the value. This
2394 is done in the finish_dynamic_symbol routine. */
2395 if ((off & 1) != 0)
2396 off &= ~1;
2397 else
2398 {
2399 bfd_put_32 (output_bfd, relocation,
2400 htab->sgot->contents + off);
2401 h->got.offset |= 1;
2402 }
2403 }
2404 else
2405 unresolved_reloc = FALSE;
2406 }
2407 else
2408 {
2409 if (local_got_offsets == NULL)
2410 abort ();
2411
2412 off = local_got_offsets[r_symndx];
2413
2414 /* The offset must always be a multiple of 4. We use
2415 the least significant bit to record whether we have
2416 already generated the necessary reloc. */
2417 if ((off & 1) != 0)
2418 off &= ~1;
2419 else
2420 {
2421 bfd_put_32 (output_bfd, relocation,
2422 htab->sgot->contents + off);
2423
2424 if (info->shared)
2425 {
2426 asection *srelgot;
2427 Elf_Internal_Rela outrel;
2428 bfd_byte *loc;
2429
2430 srelgot = htab->srelgot;
2431 if (srelgot == NULL)
2432 abort ();
2433
2434 outrel.r_offset = (htab->sgot->output_section->vma
2435 + htab->sgot->output_offset
2436 + off);
2437 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2438 outrel.r_addend = relocation;
2439 loc = srelgot->contents;
2440 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2441 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2442 }
2443
2444 local_got_offsets[r_symndx] |= 1;
2445 }
2446 }
2447
2448 if (off >= (bfd_vma) -2)
2449 abort ();
2450
2451 relocation = htab->sgot->output_offset + off;
2452
2453 /* For @GOTENT the relocation is against the offset between
2454 the instruction and the symbols entry in the GOT and not
2455 between the start of the GOT and the symbols entry. We
2456 add the vma of the GOT to get the correct value. */
2457 if ( r_type == R_390_GOTENT
2458 || r_type == R_390_GOTPLTENT)
2459 relocation += htab->sgot->output_section->vma;
2460
2461 break;
2462
2463 case R_390_GOTOFF16:
2464 case R_390_GOTOFF32:
2465 /* Relocation is relative to the start of the global offset
2466 table. */
2467
2468 /* Note that sgot->output_offset is not involved in this
2469 calculation. We always want the start of .got. If we
2470 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2471 permitted by the ABI, we might have to change this
2472 calculation. */
2473 relocation -= htab->sgot->output_section->vma;
2474 break;
2475
2476 case R_390_GOTPC:
2477 case R_390_GOTPCDBL:
2478 /* Use global offset table as symbol value. */
2479 relocation = htab->sgot->output_section->vma;
2480 unresolved_reloc = FALSE;
2481 break;
2482
2483 case R_390_PLT16DBL:
2484 case R_390_PLT32DBL:
2485 case R_390_PLT32:
2486 /* Relocation is to the entry for this symbol in the
2487 procedure linkage table. */
2488
2489 /* Resolve a PLT32 reloc against a local symbol directly,
2490 without using the procedure linkage table. */
2491 if (h == NULL)
2492 break;
2493
2494 if (h->plt.offset == (bfd_vma) -1
2495 || htab->splt == NULL)
2496 {
2497 /* We didn't make a PLT entry for this symbol. This
2498 happens when statically linking PIC code, or when
2499 using -Bsymbolic. */
2500 break;
2501 }
2502
2503 relocation = (htab->splt->output_section->vma
2504 + htab->splt->output_offset
2505 + h->plt.offset);
2506 unresolved_reloc = FALSE;
2507 break;
2508
2509 case R_390_PLTOFF16:
2510 case R_390_PLTOFF32:
2511 /* Relocation is to the entry for this symbol in the
2512 procedure linkage table relative to the start of the GOT. */
2513
2514 /* For local symbols or if we didn't make a PLT entry for
2515 this symbol resolve the symbol directly. */
2516 if ( h == NULL
2517 || h->plt.offset == (bfd_vma) -1
2518 || htab->splt == NULL)
2519 {
2520 relocation -= htab->sgot->output_section->vma;
2521 break;
2522 }
2523
2524 relocation = (htab->splt->output_section->vma
2525 + htab->splt->output_offset
2526 + h->plt.offset
2527 - htab->sgot->output_section->vma);
2528 unresolved_reloc = FALSE;
2529 break;
2530
2531 case R_390_8:
2532 case R_390_16:
2533 case R_390_32:
2534 case R_390_PC16:
2535 case R_390_PC16DBL:
2536 case R_390_PC32DBL:
2537 case R_390_PC32:
2538 /* r_symndx will be zero only for relocs against symbols
2539 from removed linkonce sections, or sections discarded by
2540 a linker script. */
2541 if (r_symndx == 0
2542 || (input_section->flags & SEC_ALLOC) == 0)
2543 break;
2544
2545 if ((info->shared
2546 && (h == NULL
2547 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2548 || h->root.type != bfd_link_hash_undefweak)
2549 && ((r_type != R_390_PC16
2550 && r_type != R_390_PC16DBL
2551 && r_type != R_390_PC32DBL
2552 && r_type != R_390_PC32)
2553 || (h != NULL
2554 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2555 || (ELIMINATE_COPY_RELOCS
2556 && !info->shared
2557 && h != NULL
2558 && h->dynindx != -1
2559 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2560 && (((h->elf_link_hash_flags
2561 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2562 && (h->elf_link_hash_flags
2563 & ELF_LINK_HASH_DEF_REGULAR) == 0)
2564 || h->root.type == bfd_link_hash_undefweak
2565 || h->root.type == bfd_link_hash_undefined)))
2566 {
2567 Elf_Internal_Rela outrel;
2568 bfd_boolean skip, relocate;
2569 asection *sreloc;
2570 bfd_byte *loc;
2571
2572 /* When generating a shared object, these relocations
2573 are copied into the output file to be resolved at run
2574 time. */
2575
2576 skip = FALSE;
2577 relocate = FALSE;
2578
2579 outrel.r_offset =
2580 _bfd_elf_section_offset (output_bfd, info, input_section,
2581 rel->r_offset);
2582 if (outrel.r_offset == (bfd_vma) -1)
2583 skip = TRUE;
2584 else if (outrel.r_offset == (bfd_vma) -2)
2585 skip = TRUE, relocate = TRUE;
2586 outrel.r_offset += (input_section->output_section->vma
2587 + input_section->output_offset);
2588
2589 if (skip)
2590 memset (&outrel, 0, sizeof outrel);
2591 else if (h != NULL
2592 && h->dynindx != -1
2593 && (r_type == R_390_PC16
2594 || r_type == R_390_PC16DBL
2595 || r_type == R_390_PC32DBL
2596 || r_type == R_390_PC32
2597 || !info->shared
2598 || !info->symbolic
2599 || (h->elf_link_hash_flags
2600 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2601 {
2602 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2603 outrel.r_addend = rel->r_addend;
2604 }
2605 else
2606 {
2607 /* This symbol is local, or marked to become local. */
2608 outrel.r_addend = relocation + rel->r_addend;
2609 if (r_type == R_390_32)
2610 {
2611 relocate = TRUE;
2612 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2613 }
2614 else
2615 {
2616 long sindx;
2617
2618 if (bfd_is_abs_section (sec))
2619 sindx = 0;
2620 else if (sec == NULL || sec->owner == NULL)
2621 {
2622 bfd_set_error(bfd_error_bad_value);
2623 return FALSE;
2624 }
2625 else
2626 {
2627 asection *osec;
2628
2629 osec = sec->output_section;
2630 sindx = elf_section_data (osec)->dynindx;
2631 BFD_ASSERT (sindx > 0);
2632
2633 /* We are turning this relocation into one
2634 against a section symbol, so subtract out
2635 the output section's address but not the
2636 offset of the input section in the output
2637 section. */
2638
2639 outrel.r_addend -= osec->vma;
2640 }
2641 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2642 }
2643 }
2644
2645 sreloc = elf_section_data (input_section)->sreloc;
2646 if (sreloc == NULL)
2647 abort ();
2648
2649 loc = sreloc->contents;
2650 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2651 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2652
2653 /* If this reloc is against an external symbol, we do
2654 not want to fiddle with the addend. Otherwise, we
2655 need to include the symbol value so that it becomes
2656 an addend for the dynamic reloc. */
2657 if (! relocate)
2658 continue;
2659 }
2660 break;
2661
2662 /* Relocations for tls literal pool entries. */
2663 case R_390_TLS_IE32:
2664 if (info->shared)
2665 {
2666 Elf_Internal_Rela outrel;
2667 asection *sreloc;
2668 bfd_byte *loc;
2669
2670 outrel.r_offset = rel->r_offset
2671 + input_section->output_section->vma
2672 + input_section->output_offset;
2673 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2674 sreloc = elf_section_data (input_section)->sreloc;
2675 if (sreloc == NULL)
2676 abort ();
2677 loc = sreloc->contents;
2678 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2679 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2680 }
2681 /* Fall through. */
2682
2683 case R_390_TLS_GD32:
2684 case R_390_TLS_GOTIE32:
2685 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2686 tls_type = GOT_UNKNOWN;
2687 if (h == NULL && local_got_offsets)
2688 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2689 else if (h != NULL)
2690 {
2691 tls_type = elf_s390_hash_entry(h)->tls_type;
2692 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2693 r_type = R_390_TLS_LE32;
2694 }
2695 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2696 r_type = R_390_TLS_IE32;
2697
2698 if (r_type == R_390_TLS_LE32)
2699 {
2700 /* This relocation gets optimized away by the local exec
2701 access optimization. */
2702 BFD_ASSERT (! unresolved_reloc);
2703 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2704 contents + rel->r_offset);
2705 continue;
2706 }
2707
2708 if (htab->sgot == NULL)
2709 abort ();
2710
2711 if (h != NULL)
2712 off = h->got.offset;
2713 else
2714 {
2715 if (local_got_offsets == NULL)
2716 abort ();
2717
2718 off = local_got_offsets[r_symndx];
2719 }
2720
2721 emit_tls_relocs:
2722
2723 if ((off & 1) != 0)
2724 off &= ~1;
2725 else
2726 {
2727 Elf_Internal_Rela outrel;
2728 bfd_byte *loc;
2729 int dr_type, indx;
2730
2731 if (htab->srelgot == NULL)
2732 abort ();
2733
2734 outrel.r_offset = (htab->sgot->output_section->vma
2735 + htab->sgot->output_offset + off);
2736
2737 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2738 if (r_type == R_390_TLS_GD32)
2739 dr_type = R_390_TLS_DTPMOD;
2740 else
2741 dr_type = R_390_TLS_TPOFF;
2742 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2743 outrel.r_addend = relocation - dtpoff_base (info);
2744 else
2745 outrel.r_addend = 0;
2746 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2747 loc = htab->srelgot->contents;
2748 loc += htab->srelgot->reloc_count++
2749 * sizeof (Elf32_External_Rela);
2750 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2751
2752 if (r_type == R_390_TLS_GD32)
2753 {
2754 if (indx == 0)
2755 {
2756 BFD_ASSERT (! unresolved_reloc);
2757 bfd_put_32 (output_bfd,
2758 relocation - dtpoff_base (info),
2759 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2760 }
2761 else
2762 {
2763 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2764 outrel.r_offset += GOT_ENTRY_SIZE;
2765 outrel.r_addend = 0;
2766 htab->srelgot->reloc_count++;
2767 loc += sizeof (Elf32_External_Rela);
2768 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2769 }
2770 }
2771
2772 if (h != NULL)
2773 h->got.offset |= 1;
2774 else
2775 local_got_offsets[r_symndx] |= 1;
2776 }
2777
2778 if (off >= (bfd_vma) -2)
2779 abort ();
2780 if (r_type == ELF32_R_TYPE (rel->r_info))
2781 {
2782 relocation = htab->sgot->output_offset + off;
2783 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2784 relocation += htab->sgot->output_section->vma;
2785 unresolved_reloc = FALSE;
2786 }
2787 else
2788 {
2789 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2790 contents + rel->r_offset);
2791 continue;
2792 }
2793 break;
2794
2795 case R_390_TLS_GOTIE12:
2796 case R_390_TLS_GOTIE20:
2797 case R_390_TLS_IEENT:
2798 if (h == NULL)
2799 {
2800 if (local_got_offsets == NULL)
2801 abort();
2802 off = local_got_offsets[r_symndx];
2803 if (info->shared)
2804 goto emit_tls_relocs;
2805 }
2806 else
2807 {
2808 off = h->got.offset;
2809 tls_type = elf_s390_hash_entry(h)->tls_type;
2810 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2811 goto emit_tls_relocs;
2812 }
2813
2814 if (htab->sgot == NULL)
2815 abort ();
2816
2817 BFD_ASSERT (! unresolved_reloc);
2818 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2819 htab->sgot->contents + off);
2820 relocation = htab->sgot->output_offset + off;
2821 if (r_type == R_390_TLS_IEENT)
2822 relocation += htab->sgot->output_section->vma;
2823 unresolved_reloc = FALSE;
2824 break;
2825
2826 case R_390_TLS_LDM32:
2827 if (! info->shared)
2828 /* The literal pool entry this relocation refers to gets ignored
2829 by the optimized code of the local exec model. Do nothing
2830 and the value will turn out zero. */
2831 continue;
2832
2833 if (htab->sgot == NULL)
2834 abort ();
2835
2836 off = htab->tls_ldm_got.offset;
2837 if (off & 1)
2838 off &= ~1;
2839 else
2840 {
2841 Elf_Internal_Rela outrel;
2842 bfd_byte *loc;
2843
2844 if (htab->srelgot == NULL)
2845 abort ();
2846
2847 outrel.r_offset = (htab->sgot->output_section->vma
2848 + htab->sgot->output_offset + off);
2849
2850 bfd_put_32 (output_bfd, 0,
2851 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2852 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2853 outrel.r_addend = 0;
2854 loc = htab->srelgot->contents;
2855 loc += htab->srelgot->reloc_count++
2856 * sizeof (Elf32_External_Rela);
2857 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2858 htab->tls_ldm_got.offset |= 1;
2859 }
2860 relocation = htab->sgot->output_offset + off;
2861 unresolved_reloc = FALSE;
2862 break;
2863
2864 case R_390_TLS_LE32:
2865 if (info->shared)
2866 {
2867 /* Linking a shared library with non-fpic code requires
2868 a R_390_TLS_TPOFF relocation. */
2869 Elf_Internal_Rela outrel;
2870 asection *sreloc;
2871 bfd_byte *loc;
2872 int indx;
2873
2874 outrel.r_offset = rel->r_offset
2875 + input_section->output_section->vma
2876 + input_section->output_offset;
2877 if (h != NULL && h->dynindx != -1)
2878 indx = h->dynindx;
2879 else
2880 indx = 0;
2881 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2882 if (indx == 0)
2883 outrel.r_addend = relocation - dtpoff_base (info);
2884 else
2885 outrel.r_addend = 0;
2886 sreloc = elf_section_data (input_section)->sreloc;
2887 if (sreloc == NULL)
2888 abort ();
2889 loc = sreloc->contents;
2890 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2891 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2892 }
2893 else
2894 {
2895 BFD_ASSERT (! unresolved_reloc);
2896 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2897 contents + rel->r_offset);
2898 }
2899 continue;
2900
2901 case R_390_TLS_LDO32:
2902 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2903 relocation -= dtpoff_base (info);
2904 else
2905 /* When converting LDO to LE, we must negate. */
2906 relocation = -tpoff (info, relocation);
2907 break;
2908
2909 /* Relocations for tls instructions. */
2910 case R_390_TLS_LOAD:
2911 case R_390_TLS_GDCALL:
2912 case R_390_TLS_LDCALL:
2913 tls_type = GOT_UNKNOWN;
2914 if (h == NULL && local_got_offsets)
2915 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2916 else if (h != NULL)
2917 tls_type = elf_s390_hash_entry(h)->tls_type;
2918
2919 if (tls_type == GOT_TLS_GD)
2920 continue;
2921
2922 if (r_type == R_390_TLS_LOAD)
2923 {
2924 if (!info->shared && (h == NULL || h->dynindx == -1))
2925 {
2926 /* IE->LE transition. Four valid cases:
2927 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2928 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2929 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2930 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2931 unsigned int insn, ry;
2932
2933 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2934 ry = 0;
2935 if ((insn & 0xff00f000) == 0x58000000)
2936 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2937 ry = (insn & 0x000f0000);
2938 else if ((insn & 0xff0f0000) == 0x58000000)
2939 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2940 ry = (insn & 0x0000f000) << 4;
2941 else if ((insn & 0xff00f000) == 0x5800c000)
2942 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2943 ry = (insn & 0x000f0000);
2944 else if ((insn & 0xff0f0000) == 0x580c0000)
2945 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2946 ry = (insn & 0x0000f000) << 4;
2947 else
2948 invalid_tls_insn (input_bfd, input_section, rel);
2949 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2950 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2951 }
2952 }
2953 else if (r_type == R_390_TLS_GDCALL)
2954 {
2955 unsigned int insn;
2956
2957 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2958 if ((insn & 0xff000fff) != 0x4d000000)
2959 invalid_tls_insn (input_bfd, input_section, rel);
2960 if (!info->shared && (h == NULL || h->dynindx == -1))
2961 /* GD->LE transition.
2962 bas %r14,0(%rx,%r13) -> bc 0,0 */
2963 insn = 0x47000000;
2964 else
2965 /* GD->IE transition.
2966 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2967 insn = 0x5822c000;
2968 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2969 }
2970 else if (r_type == R_390_TLS_LDCALL)
2971 {
2972 if (!info->shared)
2973 {
2974 unsigned int insn;
2975
2976 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2977 if ((insn & 0xff000fff) != 0x4d000000)
2978 invalid_tls_insn (input_bfd, input_section, rel);
2979 /* LD->LE transition.
2980 bas %r14,0(%rx,%r13) -> bc 0,0 */
2981 insn = 0x47000000;
2982 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2983 }
2984 }
2985 continue;
2986
2987 default:
2988 break;
2989 }
2990
2991 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2992 because such sections are not SEC_ALLOC and thus ld.so will
2993 not process them. */
2994 if (unresolved_reloc
2995 && !((input_section->flags & SEC_DEBUGGING) != 0
2996 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2997 (*_bfd_error_handler)
2998 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2999 bfd_archive_filename (input_bfd),
3000 bfd_get_section_name (input_bfd, input_section),
3001 (long) rel->r_offset,
3002 h->root.root.string);
3003
3004 if (r_type == R_390_20
3005 || r_type == R_390_GOT20
3006 || r_type == R_390_GOTPLT20
3007 || r_type == R_390_TLS_GOTIE20)
3008 {
3009 relocation += rel->r_addend;
3010 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3011 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3012 contents, rel->r_offset,
3013 relocation, 0);
3014 }
3015 else
3016 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3017 contents, rel->r_offset,
3018 relocation, rel->r_addend);
3019
3020 if (r != bfd_reloc_ok)
3021 {
3022 const char *name;
3023
3024 if (h != NULL)
3025 name = h->root.root.string;
3026 else
3027 {
3028 name = bfd_elf_string_from_elf_section (input_bfd,
3029 symtab_hdr->sh_link,
3030 sym->st_name);
3031 if (name == NULL)
3032 return FALSE;
3033 if (*name == '\0')
3034 name = bfd_section_name (input_bfd, sec);
3035 }
3036
3037 if (r == bfd_reloc_overflow)
3038 {
3039
3040 if (! ((*info->callbacks->reloc_overflow)
3041 (info, name, howto->name, (bfd_vma) 0,
3042 input_bfd, input_section, rel->r_offset)))
3043 return FALSE;
3044 }
3045 else
3046 {
3047 (*_bfd_error_handler)
3048 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
3049 bfd_archive_filename (input_bfd),
3050 bfd_get_section_name (input_bfd, input_section),
3051 (long) rel->r_offset, name, (int) r);
3052 return FALSE;
3053 }
3054 }
3055 }
3056
3057 return TRUE;
3058 }
3059
3060 /* Finish up dynamic symbol handling. We set the contents of various
3061 dynamic sections here. */
3062
3063 static bfd_boolean
3064 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3065 bfd *output_bfd;
3066 struct bfd_link_info *info;
3067 struct elf_link_hash_entry *h;
3068 Elf_Internal_Sym *sym;
3069 {
3070 struct elf_s390_link_hash_table *htab;
3071
3072 htab = elf_s390_hash_table (info);
3073
3074 if (h->plt.offset != (bfd_vma) -1)
3075 {
3076 bfd_vma plt_index;
3077 bfd_vma got_offset;
3078 Elf_Internal_Rela rela;
3079 bfd_byte *loc;
3080 bfd_vma relative_offset;
3081
3082 /* This symbol has an entry in the procedure linkage table. Set
3083 it up. */
3084 if (h->dynindx == -1
3085 || htab->splt == NULL
3086 || htab->sgotplt == NULL
3087 || htab->srelplt == NULL)
3088 abort ();
3089
3090 /* Calc. index no.
3091 Current offset - size first entry / entry size. */
3092 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3093
3094 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3095 addr & GOT addr. */
3096 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3097
3098 /* S390 uses halfwords for relative branch calc! */
3099 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3100 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3101 /* If offset is > 32768, branch to a previous branch
3102 390 can only handle +-64 K jumps. */
3103 if ( -32768 > (int) relative_offset )
3104 relative_offset
3105 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3106
3107 /* Fill in the entry in the procedure linkage table. */
3108 if (!info->shared)
3109 {
3110 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3111 htab->splt->contents + h->plt.offset);
3112 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3113 htab->splt->contents + h->plt.offset + 4);
3114 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3115 htab->splt->contents + h->plt.offset + 8);
3116 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3117 htab->splt->contents + h->plt.offset + 12);
3118 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3119 htab->splt->contents + h->plt.offset + 16);
3120 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3121 htab->splt->contents + h->plt.offset + 20);
3122 bfd_put_32 (output_bfd,
3123 (htab->sgotplt->output_section->vma
3124 + htab->sgotplt->output_offset
3125 + got_offset),
3126 htab->splt->contents + h->plt.offset + 24);
3127 }
3128 else if (got_offset < 4096)
3129 {
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3131 htab->splt->contents + h->plt.offset);
3132 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3133 htab->splt->contents + h->plt.offset + 4);
3134 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3135 htab->splt->contents + h->plt.offset + 8);
3136 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3137 htab->splt->contents + h->plt.offset + 12);
3138 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3139 htab->splt->contents + h->plt.offset + 16);
3140 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3141 htab->splt->contents + h->plt.offset + 20);
3142 bfd_put_32 (output_bfd, (bfd_vma) 0,
3143 htab->splt->contents + h->plt.offset + 24);
3144 }
3145 else if (got_offset < 32768)
3146 {
3147 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3148 htab->splt->contents + h->plt.offset);
3149 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3150 htab->splt->contents + h->plt.offset + 4);
3151 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3152 htab->splt->contents + h->plt.offset + 8);
3153 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3154 htab->splt->contents + h->plt.offset + 12);
3155 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3156 htab->splt->contents + h->plt.offset + 16);
3157 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3158 htab->splt->contents + h->plt.offset + 20);
3159 bfd_put_32 (output_bfd, (bfd_vma) 0,
3160 htab->splt->contents + h->plt.offset + 24);
3161 }
3162 else
3163 {
3164 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3165 htab->splt->contents + h->plt.offset);
3166 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3167 htab->splt->contents + h->plt.offset + 4);
3168 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3169 htab->splt->contents + h->plt.offset + 8);
3170 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3171 htab->splt->contents + h->plt.offset + 12);
3172 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3173 htab->splt->contents + h->plt.offset + 16);
3174 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3175 htab->splt->contents + h->plt.offset + 20);
3176 bfd_put_32 (output_bfd, got_offset,
3177 htab->splt->contents + h->plt.offset + 24);
3178 }
3179 /* Insert offset into reloc. table here. */
3180 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3181 htab->splt->contents + h->plt.offset + 28);
3182
3183 /* Fill in the entry in the global offset table.
3184 Points to instruction after GOT offset. */
3185 bfd_put_32 (output_bfd,
3186 (htab->splt->output_section->vma
3187 + htab->splt->output_offset
3188 + h->plt.offset
3189 + 12),
3190 htab->sgotplt->contents + got_offset);
3191
3192 /* Fill in the entry in the .rela.plt section. */
3193 rela.r_offset = (htab->sgotplt->output_section->vma
3194 + htab->sgotplt->output_offset
3195 + got_offset);
3196 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3197 rela.r_addend = 0;
3198 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3199 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3200
3201 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3202 {
3203 /* Mark the symbol as undefined, rather than as defined in
3204 the .plt section. Leave the value alone. This is a clue
3205 for the dynamic linker, to make function pointer
3206 comparisons work between an application and shared
3207 library. */
3208 sym->st_shndx = SHN_UNDEF;
3209 }
3210 }
3211
3212 if (h->got.offset != (bfd_vma) -1
3213 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3214 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3215 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3216 {
3217 Elf_Internal_Rela rela;
3218 bfd_byte *loc;
3219
3220 /* This symbol has an entry in the global offset table. Set it
3221 up. */
3222
3223 if (htab->sgot == NULL || htab->srelgot == NULL)
3224 abort ();
3225
3226 rela.r_offset = (htab->sgot->output_section->vma
3227 + htab->sgot->output_offset
3228 + (h->got.offset &~ (bfd_vma) 1));
3229
3230 /* If this is a static link, or it is a -Bsymbolic link and the
3231 symbol is defined locally or was forced to be local because
3232 of a version file, we just want to emit a RELATIVE reloc.
3233 The entry in the global offset table will already have been
3234 initialized in the relocate_section function. */
3235 if (info->shared
3236 && (info->symbolic
3237 || h->dynindx == -1
3238 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
3239 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3240 {
3241 BFD_ASSERT((h->got.offset & 1) != 0);
3242 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3243 rela.r_addend = (h->root.u.def.value
3244 + h->root.u.def.section->output_section->vma
3245 + h->root.u.def.section->output_offset);
3246 }
3247 else
3248 {
3249 BFD_ASSERT((h->got.offset & 1) == 0);
3250 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3251 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3252 rela.r_addend = 0;
3253 }
3254
3255 loc = htab->srelgot->contents;
3256 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3257 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3258 }
3259
3260 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3261 {
3262 Elf_Internal_Rela rela;
3263 bfd_byte *loc;
3264
3265 /* This symbols needs a copy reloc. Set it up. */
3266
3267 if (h->dynindx == -1
3268 || (h->root.type != bfd_link_hash_defined
3269 && h->root.type != bfd_link_hash_defweak)
3270 || htab->srelbss == NULL)
3271 abort ();
3272
3273 rela.r_offset = (h->root.u.def.value
3274 + h->root.u.def.section->output_section->vma
3275 + h->root.u.def.section->output_offset);
3276 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3277 rela.r_addend = 0;
3278 loc = htab->srelbss->contents;
3279 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3280 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3281 }
3282
3283 /* Mark some specially defined symbols as absolute. */
3284 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3285 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3286 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3287 sym->st_shndx = SHN_ABS;
3288
3289 return TRUE;
3290 }
3291
3292 /* Used to decide how to sort relocs in an optimal manner for the
3293 dynamic linker, before writing them out. */
3294
3295 static enum elf_reloc_type_class
3296 elf_s390_reloc_type_class (rela)
3297 const Elf_Internal_Rela *rela;
3298 {
3299 switch ((int) ELF32_R_TYPE (rela->r_info))
3300 {
3301 case R_390_RELATIVE:
3302 return reloc_class_relative;
3303 case R_390_JMP_SLOT:
3304 return reloc_class_plt;
3305 case R_390_COPY:
3306 return reloc_class_copy;
3307 default:
3308 return reloc_class_normal;
3309 }
3310 }
3311
3312 /* Finish up the dynamic sections. */
3313
3314 static bfd_boolean
3315 elf_s390_finish_dynamic_sections (output_bfd, info)
3316 bfd *output_bfd;
3317 struct bfd_link_info *info;
3318 {
3319 struct elf_s390_link_hash_table *htab;
3320 bfd *dynobj;
3321 asection *sdyn;
3322
3323 htab = elf_s390_hash_table (info);
3324 dynobj = htab->elf.dynobj;
3325 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3326
3327 if (htab->elf.dynamic_sections_created)
3328 {
3329 Elf32_External_Dyn *dyncon, *dynconend;
3330
3331 if (sdyn == NULL || htab->sgot == NULL)
3332 abort ();
3333
3334 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3335 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3336 for (; dyncon < dynconend; dyncon++)
3337 {
3338 Elf_Internal_Dyn dyn;
3339 asection *s;
3340
3341 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3342
3343 switch (dyn.d_tag)
3344 {
3345 default:
3346 continue;
3347
3348 case DT_PLTGOT:
3349 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3350 break;
3351
3352 case DT_JMPREL:
3353 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3354 break;
3355
3356 case DT_PLTRELSZ:
3357 s = htab->srelplt->output_section;
3358 dyn.d_un.d_val = s->size;
3359 break;
3360 }
3361
3362 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3363 }
3364
3365 /* Fill in the special first entry in the procedure linkage table. */
3366 if (htab->splt && htab->splt->size > 0)
3367 {
3368 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3369 if (info->shared)
3370 {
3371 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3372 htab->splt->contents );
3373 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3374 htab->splt->contents +4 );
3375 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3376 htab->splt->contents +8 );
3377 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3378 htab->splt->contents +12 );
3379 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3380 htab->splt->contents +16 );
3381 }
3382 else
3383 {
3384 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3385 htab->splt->contents );
3386 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3387 htab->splt->contents +4 );
3388 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3389 htab->splt->contents +8 );
3390 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3391 htab->splt->contents +12 );
3392 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3393 htab->splt->contents +16 );
3394 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3395 htab->splt->contents +20 );
3396 bfd_put_32 (output_bfd,
3397 htab->sgotplt->output_section->vma
3398 + htab->sgotplt->output_offset,
3399 htab->splt->contents + 24);
3400 }
3401 elf_section_data (htab->splt->output_section)
3402 ->this_hdr.sh_entsize = 4;
3403 }
3404
3405 }
3406
3407 if (htab->sgotplt)
3408 {
3409 /* Fill in the first three entries in the global offset table. */
3410 if (htab->sgotplt->size > 0)
3411 {
3412 bfd_put_32 (output_bfd,
3413 (sdyn == NULL ? (bfd_vma) 0
3414 : sdyn->output_section->vma + sdyn->output_offset),
3415 htab->sgotplt->contents);
3416 /* One entry for shared object struct ptr. */
3417 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3418 /* One entry for _dl_runtime_resolve. */
3419 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3420 }
3421
3422 elf_section_data (htab->sgotplt->output_section)
3423 ->this_hdr.sh_entsize = 4;
3424 }
3425 return TRUE;
3426 }
3427
3428 static bfd_boolean
3429 elf_s390_grok_prstatus (abfd, note)
3430 bfd * abfd;
3431 Elf_Internal_Note * note;
3432 {
3433 int offset;
3434 unsigned int size;
3435
3436 switch (note->descsz)
3437 {
3438 default:
3439 return FALSE;
3440
3441 case 224: /* S/390 Linux. */
3442 /* pr_cursig */
3443 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3444
3445 /* pr_pid */
3446 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3447
3448 /* pr_reg */
3449 offset = 72;
3450 size = 144;
3451 break;
3452 }
3453
3454 /* Make a ".reg/999" section. */
3455 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3456 size, note->descpos + offset);
3457 }
3458
3459 /* Return address for Ith PLT stub in section PLT, for relocation REL
3460 or (bfd_vma) -1 if it should not be included. */
3461
3462 static bfd_vma
3463 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3464 const arelent *rel ATTRIBUTE_UNUSED)
3465 {
3466 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3467 }
3468
3469
3470 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3471 #define TARGET_BIG_NAME "elf32-s390"
3472 #define ELF_ARCH bfd_arch_s390
3473 #define ELF_MACHINE_CODE EM_S390
3474 #define ELF_MACHINE_ALT1 EM_S390_OLD
3475 #define ELF_MAXPAGESIZE 0x1000
3476
3477 #define elf_backend_can_gc_sections 1
3478 #define elf_backend_can_refcount 1
3479 #define elf_backend_want_got_plt 1
3480 #define elf_backend_plt_readonly 1
3481 #define elf_backend_want_plt_sym 0
3482 #define elf_backend_got_header_size 12
3483 #define elf_backend_rela_normal 1
3484
3485 #define elf_info_to_howto elf_s390_info_to_howto
3486
3487 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3488 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3489 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3490
3491 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3492 #define elf_backend_check_relocs elf_s390_check_relocs
3493 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3494 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3495 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3496 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3497 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3498 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3499 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3500 #define elf_backend_relocate_section elf_s390_relocate_section
3501 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3502 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3503 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3504 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3505
3506 #define bfd_elf32_mkobject elf_s390_mkobject
3507 #define elf_backend_object_p elf_s390_object_p
3508
3509 #include "elf32-target.h"