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[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
4 Contributed by Carl B. Pedersen and Martin Schwidefsky.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 static asection *elf_s390_gc_mark_hook
50 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
51 struct elf_link_hash_entry *, Elf_Internal_Sym *));
52 static bfd_boolean elf_s390_gc_sweep_hook
53 PARAMS ((bfd *, struct bfd_link_info *, asection *,
54 const Elf_Internal_Rela *));
55 struct elf_s390_link_hash_entry;
56 static void elf_s390_adjust_gotplt
57 PARAMS ((struct elf_s390_link_hash_entry *));
58 static bfd_boolean elf_s390_adjust_dynamic_symbol
59 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
60 static bfd_boolean allocate_dynrelocs
61 PARAMS ((struct elf_link_hash_entry *, PTR));
62 static bfd_boolean readonly_dynrelocs
63 PARAMS ((struct elf_link_hash_entry *, PTR));
64 static bfd_boolean elf_s390_size_dynamic_sections
65 PARAMS ((bfd *, struct bfd_link_info *));
66 static bfd_boolean elf_s390_relocate_section
67 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
68 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
69 static bfd_boolean elf_s390_finish_dynamic_symbol
70 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
71 Elf_Internal_Sym *));
72 static enum elf_reloc_type_class elf_s390_reloc_type_class
73 PARAMS ((const Elf_Internal_Rela *));
74 static bfd_boolean elf_s390_finish_dynamic_sections
75 PARAMS ((bfd *, struct bfd_link_info *));
76 static bfd_boolean elf_s390_object_p
77 PARAMS ((bfd *));
78 static bfd_boolean elf_s390_grok_prstatus
79 PARAMS ((bfd *, Elf_Internal_Note *));
80 static int elf_s390_tls_transition
81 PARAMS ((struct bfd_link_info *, int, int));
82 static bfd_reloc_status_type s390_tls_reloc
83 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
84 static bfd_vma dtpoff_base
85 PARAMS ((struct bfd_link_info *));
86 static bfd_vma tpoff
87 PARAMS ((struct bfd_link_info *, bfd_vma));
88 static void invalid_tls_insn
89 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
90 static bfd_reloc_status_type s390_elf_ldisp_reloc
91 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
92
93 #include "elf/s390.h"
94
95 /* The relocation "howto" table. */
96
97 static reloc_howto_type elf_howto_table[] =
98 {
99 HOWTO (R_390_NONE, /* type */
100 0, /* rightshift */
101 0, /* size (0 = byte, 1 = short, 2 = long) */
102 0, /* bitsize */
103 FALSE, /* pc_relative */
104 0, /* bitpos */
105 complain_overflow_dont, /* complain_on_overflow */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_390_NONE", /* name */
108 FALSE, /* partial_inplace */
109 0, /* src_mask */
110 0, /* dst_mask */
111 FALSE), /* pcrel_offset */
112
113 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
115 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
117 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
123 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
125 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
127 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
129 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
131 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
133 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
135 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
137 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
139 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
141 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
143 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
145 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
147 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
149 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
151 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
153 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
155 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
156 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
157 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
158 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
159 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
161 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
163 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
164 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
165 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
166 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
168 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
170 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
171 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
172 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
173 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
175 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
177 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
178 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
179 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
180 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
181 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
182 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
183 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
184 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
185 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
186 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
187 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
188 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
189 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
190 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
191 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
192 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
193 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
194 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
195 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
196 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
197 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
198 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
199 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
200 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
202 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
203 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
204 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
205 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
206 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
207 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
208 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
210 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
212 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
213 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
214 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
215 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
216 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
217 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
218 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
219 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
220 };
221
222 /* GNU extension to record C++ vtable hierarchy. */
223 static reloc_howto_type elf32_s390_vtinherit_howto =
224 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
225 static reloc_howto_type elf32_s390_vtentry_howto =
226 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);
227
228 static reloc_howto_type *
229 elf_s390_reloc_type_lookup (abfd, code)
230 bfd *abfd ATTRIBUTE_UNUSED;
231 bfd_reloc_code_real_type code;
232 {
233 switch (code)
234 {
235 case BFD_RELOC_NONE:
236 return &elf_howto_table[(int) R_390_NONE];
237 case BFD_RELOC_8:
238 return &elf_howto_table[(int) R_390_8];
239 case BFD_RELOC_390_12:
240 return &elf_howto_table[(int) R_390_12];
241 case BFD_RELOC_16:
242 return &elf_howto_table[(int) R_390_16];
243 case BFD_RELOC_32:
244 return &elf_howto_table[(int) R_390_32];
245 case BFD_RELOC_CTOR:
246 return &elf_howto_table[(int) R_390_32];
247 case BFD_RELOC_32_PCREL:
248 return &elf_howto_table[(int) R_390_PC32];
249 case BFD_RELOC_390_GOT12:
250 return &elf_howto_table[(int) R_390_GOT12];
251 case BFD_RELOC_32_GOT_PCREL:
252 return &elf_howto_table[(int) R_390_GOT32];
253 case BFD_RELOC_390_PLT32:
254 return &elf_howto_table[(int) R_390_PLT32];
255 case BFD_RELOC_390_COPY:
256 return &elf_howto_table[(int) R_390_COPY];
257 case BFD_RELOC_390_GLOB_DAT:
258 return &elf_howto_table[(int) R_390_GLOB_DAT];
259 case BFD_RELOC_390_JMP_SLOT:
260 return &elf_howto_table[(int) R_390_JMP_SLOT];
261 case BFD_RELOC_390_RELATIVE:
262 return &elf_howto_table[(int) R_390_RELATIVE];
263 case BFD_RELOC_32_GOTOFF:
264 return &elf_howto_table[(int) R_390_GOTOFF32];
265 case BFD_RELOC_390_GOTPC:
266 return &elf_howto_table[(int) R_390_GOTPC];
267 case BFD_RELOC_390_GOT16:
268 return &elf_howto_table[(int) R_390_GOT16];
269 case BFD_RELOC_16_PCREL:
270 return &elf_howto_table[(int) R_390_PC16];
271 case BFD_RELOC_390_PC16DBL:
272 return &elf_howto_table[(int) R_390_PC16DBL];
273 case BFD_RELOC_390_PLT16DBL:
274 return &elf_howto_table[(int) R_390_PLT16DBL];
275 case BFD_RELOC_390_PC32DBL:
276 return &elf_howto_table[(int) R_390_PC32DBL];
277 case BFD_RELOC_390_PLT32DBL:
278 return &elf_howto_table[(int) R_390_PLT32DBL];
279 case BFD_RELOC_390_GOTPCDBL:
280 return &elf_howto_table[(int) R_390_GOTPCDBL];
281 case BFD_RELOC_390_GOTENT:
282 return &elf_howto_table[(int) R_390_GOTENT];
283 case BFD_RELOC_16_GOTOFF:
284 return &elf_howto_table[(int) R_390_GOTOFF16];
285 case BFD_RELOC_390_GOTPLT12:
286 return &elf_howto_table[(int) R_390_GOTPLT12];
287 case BFD_RELOC_390_GOTPLT16:
288 return &elf_howto_table[(int) R_390_GOTPLT16];
289 case BFD_RELOC_390_GOTPLT32:
290 return &elf_howto_table[(int) R_390_GOTPLT32];
291 case BFD_RELOC_390_GOTPLTENT:
292 return &elf_howto_table[(int) R_390_GOTPLTENT];
293 case BFD_RELOC_390_PLTOFF16:
294 return &elf_howto_table[(int) R_390_PLTOFF16];
295 case BFD_RELOC_390_PLTOFF32:
296 return &elf_howto_table[(int) R_390_PLTOFF32];
297 case BFD_RELOC_390_TLS_LOAD:
298 return &elf_howto_table[(int) R_390_TLS_LOAD];
299 case BFD_RELOC_390_TLS_GDCALL:
300 return &elf_howto_table[(int) R_390_TLS_GDCALL];
301 case BFD_RELOC_390_TLS_LDCALL:
302 return &elf_howto_table[(int) R_390_TLS_LDCALL];
303 case BFD_RELOC_390_TLS_GD32:
304 return &elf_howto_table[(int) R_390_TLS_GD32];
305 case BFD_RELOC_390_TLS_GOTIE12:
306 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
307 case BFD_RELOC_390_TLS_GOTIE32:
308 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
309 case BFD_RELOC_390_TLS_LDM32:
310 return &elf_howto_table[(int) R_390_TLS_LDM32];
311 case BFD_RELOC_390_TLS_IE32:
312 return &elf_howto_table[(int) R_390_TLS_IE32];
313 case BFD_RELOC_390_TLS_IEENT:
314 return &elf_howto_table[(int) R_390_TLS_IEENT];
315 case BFD_RELOC_390_TLS_LE32:
316 return &elf_howto_table[(int) R_390_TLS_LE32];
317 case BFD_RELOC_390_TLS_LDO32:
318 return &elf_howto_table[(int) R_390_TLS_LDO32];
319 case BFD_RELOC_390_TLS_DTPMOD:
320 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
321 case BFD_RELOC_390_TLS_DTPOFF:
322 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
323 case BFD_RELOC_390_TLS_TPOFF:
324 return &elf_howto_table[(int) R_390_TLS_TPOFF];
325 case BFD_RELOC_390_20:
326 return &elf_howto_table[(int) R_390_20];
327 case BFD_RELOC_390_GOT20:
328 return &elf_howto_table[(int) R_390_GOT20];
329 case BFD_RELOC_390_GOTPLT20:
330 return &elf_howto_table[(int) R_390_GOTPLT20];
331 case BFD_RELOC_390_TLS_GOTIE20:
332 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
333 case BFD_RELOC_VTABLE_INHERIT:
334 return &elf32_s390_vtinherit_howto;
335 case BFD_RELOC_VTABLE_ENTRY:
336 return &elf32_s390_vtentry_howto;
337 default:
338 break;
339 }
340 return 0;
341 }
342
343 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
344 and elf32-s390.c has its own copy. */
345
346 static void
347 elf_s390_info_to_howto (abfd, cache_ptr, dst)
348 bfd *abfd ATTRIBUTE_UNUSED;
349 arelent *cache_ptr;
350 Elf_Internal_Rela *dst;
351 {
352 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
353 switch (r_type)
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 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
365 {
366 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
367 abfd, (int) r_type);
368 r_type = R_390_NONE;
369 }
370 cache_ptr->howto = &elf_howto_table[r_type];
371 }
372 }
373
374 /* A relocation function which doesn't do anything. */
375 static bfd_reloc_status_type
376 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
377 output_bfd, error_message)
378 bfd *abfd ATTRIBUTE_UNUSED;
379 arelent *reloc_entry;
380 asymbol *symbol ATTRIBUTE_UNUSED;
381 PTR data ATTRIBUTE_UNUSED;
382 asection *input_section;
383 bfd *output_bfd;
384 char **error_message ATTRIBUTE_UNUSED;
385 {
386 if (output_bfd)
387 reloc_entry->address += input_section->output_offset;
388 return bfd_reloc_ok;
389 }
390
391 /* Handle the large displacement relocs. */
392 static bfd_reloc_status_type
393 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
394 output_bfd, error_message)
395 bfd *abfd ATTRIBUTE_UNUSED;
396 arelent *reloc_entry;
397 asymbol *symbol;
398 PTR data ATTRIBUTE_UNUSED;
399 asection *input_section;
400 bfd *output_bfd;
401 char **error_message ATTRIBUTE_UNUSED;
402 {
403 reloc_howto_type *howto = reloc_entry->howto;
404 bfd_vma relocation;
405 bfd_vma insn;
406
407 if (output_bfd != (bfd *) NULL
408 && (symbol->flags & BSF_SECTION_SYM) == 0
409 && (! howto->partial_inplace
410 || reloc_entry->addend == 0))
411 {
412 reloc_entry->address += input_section->output_offset;
413 return bfd_reloc_ok;
414 }
415
416 if (output_bfd != NULL)
417 return bfd_reloc_continue;
418
419 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
420 return bfd_reloc_outofrange;
421
422 relocation = (symbol->value
423 + symbol->section->output_section->vma
424 + symbol->section->output_offset);
425 relocation += reloc_entry->addend;
426 if (howto->pc_relative)
427 {
428 relocation -= (input_section->output_section->vma
429 + input_section->output_offset);
430 relocation -= reloc_entry->address;
431 }
432
433 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
434 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
435 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
436
437 if ((bfd_signed_vma) relocation < - 0x80000
438 || (bfd_signed_vma) relocation > 0x7ffff)
439 return bfd_reloc_overflow;
440 else
441 return bfd_reloc_ok;
442 }
443
444 static bfd_boolean
445 elf_s390_is_local_label_name (abfd, name)
446 bfd *abfd;
447 const char *name;
448 {
449 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
450 return TRUE;
451
452 return _bfd_elf_is_local_label_name (abfd, name);
453 }
454
455 /* Functions for the 390 ELF linker. */
456
457 /* The name of the dynamic interpreter. This is put in the .interp
458 section. */
459
460 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
461
462 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
463 copying dynamic variables from a shared lib into an app's dynbss
464 section, and instead use a dynamic relocation to point into the
465 shared lib. */
466 #define ELIMINATE_COPY_RELOCS 1
467
468 /* The size in bytes of the first entry in the procedure linkage table. */
469 #define PLT_FIRST_ENTRY_SIZE 32
470 /* The size in bytes of an entry in the procedure linkage table. */
471 #define PLT_ENTRY_SIZE 32
472
473 #define GOT_ENTRY_SIZE 4
474
475 /* The first three entries in a procedure linkage table are reserved,
476 and the initial contents are unimportant (we zero them out).
477 Subsequent entries look like this. See the SVR4 ABI 386
478 supplement to see how this works. */
479
480 /* For the s390, simple addr offset can only be 0 - 4096.
481 To use the full 2 GB address space, several instructions
482 are needed to load an address in a register and execute
483 a branch( or just saving the address)
484
485 Furthermore, only r 0 and 1 are free to use!!! */
486
487 /* The first 3 words in the GOT are then reserved.
488 Word 0 is the address of the dynamic table.
489 Word 1 is a pointer to a structure describing the object
490 Word 2 is used to point to the loader entry address.
491
492 The code for position independent PLT entries looks like this:
493
494 r12 holds addr of the current GOT at entry to the PLT
495
496 The GOT holds the address in the PLT to be executed.
497 The loader then gets:
498 24(15) = Pointer to the structure describing the object.
499 28(15) = Offset in symbol table
500
501 The loader must then find the module where the function is
502 and insert the address in the GOT.
503
504 Note: 390 can only address +- 64 K relative.
505 We check if offset > 65536, then make a relative branch -64xxx
506 back to a previous defined branch
507
508 PLT1: BASR 1,0 # 2 bytes
509 L 1,22(1) # 4 bytes Load offset in GOT in r 1
510 L 1,(1,12) # 4 bytes Load address from GOT in r1
511 BCR 15,1 # 2 bytes Jump to address
512 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
513 L 1,14(1) # 4 bytes Load offset in symol table in r1
514 BRC 15,-x # 4 bytes Jump to start of PLT
515 .word 0 # 2 bytes filler
516 .long ? # 4 bytes offset in GOT
517 .long ? # 4 bytes offset into symbol table
518
519 This was the general case. There are two additional, optimizes PLT
520 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
521 First the one for GOT offsets < 4096:
522
523 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
524 BCR 15,1 # 2 bytes Jump to address
525 .word 0,0,0 # 6 bytes filler
526 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
527 L 1,14(1) # 4 bytes Load offset in symbol table in r1
528 BRC 15,-x # 4 bytes Jump to start of PLT
529 .word 0,0,0 # 6 bytes filler
530 .long ? # 4 bytes offset into symbol table
531
532 Second the one for GOT offsets < 32768:
533
534 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
535 L 1,(1,12) # 4 bytes Load address from GOT to r1
536 BCR 15,1 # 2 bytes Jump to address
537 .word 0 # 2 bytes filler
538 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
539 L 1,14(1) # 4 bytes Load offset in symbol table in r1
540 BRC 15,-x # 4 bytes Jump to start of PLT
541 .word 0,0,0 # 6 bytes filler
542 .long ? # 4 bytes offset into symbol table
543
544 Total = 32 bytes per PLT entry
545
546 The code for static build PLT entries looks like this:
547
548 PLT1: BASR 1,0 # 2 bytes
549 L 1,22(1) # 4 bytes Load address of GOT entry
550 L 1,0(0,1) # 4 bytes Load address from GOT in r1
551 BCR 15,1 # 2 bytes Jump to address
552 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
553 L 1,14(1) # 4 bytes Load offset in symbol table in r1
554 BRC 15,-x # 4 bytes Jump to start of PLT
555 .word 0 # 2 bytes filler
556 .long ? # 4 bytes address of GOT entry
557 .long ? # 4 bytes offset into symbol table */
558
559 #define PLT_PIC_ENTRY_WORD0 0x0d105810
560 #define PLT_PIC_ENTRY_WORD1 0x10165811
561 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
562 #define PLT_PIC_ENTRY_WORD3 0x0d105810
563 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
564
565 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
566 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
567 #define PLT_PIC12_ENTRY_WORD2 0x00000000
568 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
569 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
570
571 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
572 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
573 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
574 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
575 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
576
577 #define PLT_ENTRY_WORD0 0x0d105810
578 #define PLT_ENTRY_WORD1 0x10165810
579 #define PLT_ENTRY_WORD2 0x100007f1
580 #define PLT_ENTRY_WORD3 0x0d105810
581 #define PLT_ENTRY_WORD4 0x100ea7f4
582
583 /* The first PLT entry pushes the offset into the symbol table
584 from R1 onto the stack at 8(15) and the loader object info
585 at 12(15), loads the loader address in R1 and jumps to it. */
586
587 /* The first entry in the PLT for PIC code:
588
589 PLT0:
590 ST 1,28(15) # R1 has offset into symbol table
591 L 1,4(12) # Get loader ino(object struct address)
592 ST 1,24(15) # Store address
593 L 1,8(12) # Entry address of loader in R1
594 BR 1 # Jump to loader
595
596 The first entry in the PLT for static code:
597
598 PLT0:
599 ST 1,28(15) # R1 has offset into symbol table
600 BASR 1,0
601 L 1,18(0,1) # Get address of GOT
602 MVC 24(4,15),4(1) # Move loader ino to stack
603 L 1,8(1) # Get address of loader
604 BR 1 # Jump to loader
605 .word 0 # filler
606 .long got # address of GOT */
607
608 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
609 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
610 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
611 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
612 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
613
614 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
615 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
616 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
617 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
618 #define PLT_FIRST_ENTRY_WORD4 0x58101008
619 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
620
621 /* The s390 linker needs to keep track of the number of relocs that it
622 decides to copy as dynamic relocs in check_relocs for each symbol.
623 This is so that it can later discard them if they are found to be
624 unnecessary. We store the information in a field extending the
625 regular ELF linker hash table. */
626
627 struct elf_s390_dyn_relocs
628 {
629 struct elf_s390_dyn_relocs *next;
630
631 /* The input section of the reloc. */
632 asection *sec;
633
634 /* Total number of relocs copied for the input section. */
635 bfd_size_type count;
636
637 /* Number of pc-relative relocs copied for the input section. */
638 bfd_size_type pc_count;
639 };
640
641 /* s390 ELF linker hash entry. */
642
643 struct elf_s390_link_hash_entry
644 {
645 struct elf_link_hash_entry elf;
646
647 /* Track dynamic relocs copied for this symbol. */
648 struct elf_s390_dyn_relocs *dyn_relocs;
649
650 /* Number of GOTPLT references for a function. */
651 bfd_signed_vma gotplt_refcount;
652
653 #define GOT_UNKNOWN 0
654 #define GOT_NORMAL 1
655 #define GOT_TLS_GD 2
656 #define GOT_TLS_IE 3
657 #define GOT_TLS_IE_NLT 4
658 unsigned char tls_type;
659 };
660
661 #define elf_s390_hash_entry(ent) \
662 ((struct elf_s390_link_hash_entry *)(ent))
663
664 struct elf_s390_obj_tdata
665 {
666 struct elf_obj_tdata root;
667
668 /* tls_type for each local got entry. */
669 char *local_got_tls_type;
670 };
671
672 #define elf_s390_tdata(abfd) \
673 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
674
675 #define elf_s390_local_got_tls_type(abfd) \
676 (elf_s390_tdata (abfd)->local_got_tls_type)
677
678 static bfd_boolean
679 elf_s390_mkobject (bfd *abfd)
680 {
681 if (abfd->tdata.any == NULL)
682 {
683 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
684 abfd->tdata.any = bfd_zalloc (abfd, amt);
685 if (abfd->tdata.any == NULL)
686 return FALSE;
687 }
688 return bfd_elf_mkobject (abfd);
689 }
690
691 static bfd_boolean
692 elf_s390_object_p (abfd)
693 bfd *abfd;
694 {
695 /* Set the right machine number for an s390 elf32 file. */
696 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
697 }
698
699 /* s390 ELF linker hash table. */
700
701 struct elf_s390_link_hash_table
702 {
703 struct elf_link_hash_table elf;
704
705 /* Short-cuts to get to dynamic linker sections. */
706 asection *sgot;
707 asection *sgotplt;
708 asection *srelgot;
709 asection *splt;
710 asection *srelplt;
711 asection *sdynbss;
712 asection *srelbss;
713
714 union {
715 bfd_signed_vma refcount;
716 bfd_vma offset;
717 } tls_ldm_got;
718
719 /* Small local sym to section mapping cache. */
720 struct sym_sec_cache sym_sec;
721 };
722
723 /* Get the s390 ELF linker hash table from a link_info structure. */
724
725 #define elf_s390_hash_table(p) \
726 ((struct elf_s390_link_hash_table *) ((p)->hash))
727
728 /* Create an entry in an s390 ELF linker hash table. */
729
730 static struct bfd_hash_entry *
731 link_hash_newfunc (entry, table, string)
732 struct bfd_hash_entry *entry;
733 struct bfd_hash_table *table;
734 const char *string;
735 {
736 /* Allocate the structure if it has not already been allocated by a
737 subclass. */
738 if (entry == NULL)
739 {
740 entry = bfd_hash_allocate (table,
741 sizeof (struct elf_s390_link_hash_entry));
742 if (entry == NULL)
743 return entry;
744 }
745
746 /* Call the allocation method of the superclass. */
747 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
748 if (entry != NULL)
749 {
750 struct elf_s390_link_hash_entry *eh;
751
752 eh = (struct elf_s390_link_hash_entry *) entry;
753 eh->dyn_relocs = NULL;
754 eh->gotplt_refcount = 0;
755 eh->tls_type = GOT_UNKNOWN;
756 }
757
758 return entry;
759 }
760
761 /* Create an s390 ELF linker hash table. */
762
763 static struct bfd_link_hash_table *
764 elf_s390_link_hash_table_create (abfd)
765 bfd *abfd;
766 {
767 struct elf_s390_link_hash_table *ret;
768 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
769
770 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
771 if (ret == NULL)
772 return NULL;
773
774 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
775 sizeof (struct elf_s390_link_hash_entry)))
776 {
777 free (ret);
778 return NULL;
779 }
780
781 ret->sgot = NULL;
782 ret->sgotplt = NULL;
783 ret->srelgot = NULL;
784 ret->splt = NULL;
785 ret->srelplt = NULL;
786 ret->sdynbss = NULL;
787 ret->srelbss = NULL;
788 ret->tls_ldm_got.refcount = 0;
789 ret->sym_sec.abfd = NULL;
790
791 return &ret->elf.root;
792 }
793
794 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
795 shortcuts to them in our hash table. */
796
797 static bfd_boolean
798 create_got_section (dynobj, info)
799 bfd *dynobj;
800 struct bfd_link_info *info;
801 {
802 struct elf_s390_link_hash_table *htab;
803
804 if (! _bfd_elf_create_got_section (dynobj, info))
805 return FALSE;
806
807 htab = elf_s390_hash_table (info);
808 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
809 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
810 if (!htab->sgot || !htab->sgotplt)
811 abort ();
812
813 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
814 (SEC_ALLOC | SEC_LOAD
815 | SEC_HAS_CONTENTS
816 | SEC_IN_MEMORY
817 | SEC_LINKER_CREATED
818 | SEC_READONLY));
819 if (htab->srelgot == NULL
820 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
821 return FALSE;
822 return TRUE;
823 }
824
825 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
826 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
827 hash table. */
828
829 static bfd_boolean
830 elf_s390_create_dynamic_sections (dynobj, info)
831 bfd *dynobj;
832 struct bfd_link_info *info;
833 {
834 struct elf_s390_link_hash_table *htab;
835
836 htab = elf_s390_hash_table (info);
837 if (!htab->sgot && !create_got_section (dynobj, info))
838 return FALSE;
839
840 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
841 return FALSE;
842
843 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
844 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
845 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
846 if (!info->shared)
847 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
848
849 if (!htab->splt || !htab->srelplt || !htab->sdynbss
850 || (!info->shared && !htab->srelbss))
851 abort ();
852
853 return TRUE;
854 }
855
856 /* Copy the extra info we tack onto an elf_link_hash_entry. */
857
858 static void
859 elf_s390_copy_indirect_symbol (info, dir, ind)
860 struct bfd_link_info *info;
861 struct elf_link_hash_entry *dir, *ind;
862 {
863 struct elf_s390_link_hash_entry *edir, *eind;
864
865 edir = (struct elf_s390_link_hash_entry *) dir;
866 eind = (struct elf_s390_link_hash_entry *) ind;
867
868 if (eind->dyn_relocs != NULL)
869 {
870 if (edir->dyn_relocs != NULL)
871 {
872 struct elf_s390_dyn_relocs **pp;
873 struct elf_s390_dyn_relocs *p;
874
875 /* Add reloc counts against the indirect sym to the direct sym
876 list. Merge any entries against the same section. */
877 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
878 {
879 struct elf_s390_dyn_relocs *q;
880
881 for (q = edir->dyn_relocs; q != NULL; q = q->next)
882 if (q->sec == p->sec)
883 {
884 q->pc_count += p->pc_count;
885 q->count += p->count;
886 *pp = p->next;
887 break;
888 }
889 if (q == NULL)
890 pp = &p->next;
891 }
892 *pp = edir->dyn_relocs;
893 }
894
895 edir->dyn_relocs = eind->dyn_relocs;
896 eind->dyn_relocs = NULL;
897 }
898
899 if (ind->root.type == bfd_link_hash_indirect
900 && dir->got.refcount <= 0)
901 {
902 edir->tls_type = eind->tls_type;
903 eind->tls_type = GOT_UNKNOWN;
904 }
905
906 if (ELIMINATE_COPY_RELOCS
907 && ind->root.type != bfd_link_hash_indirect
908 && dir->dynamic_adjusted)
909 {
910 /* If called to transfer flags for a weakdef during processing
911 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
912 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
913 dir->ref_dynamic |= ind->ref_dynamic;
914 dir->ref_regular |= ind->ref_regular;
915 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
916 dir->needs_plt |= ind->needs_plt;
917 }
918 else
919 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
920 }
921
922 static int
923 elf_s390_tls_transition (info, r_type, is_local)
924 struct bfd_link_info *info;
925 int r_type;
926 int is_local;
927 {
928 if (info->shared)
929 return r_type;
930
931 switch (r_type)
932 {
933 case R_390_TLS_GD32:
934 case R_390_TLS_IE32:
935 if (is_local)
936 return R_390_TLS_LE32;
937 return R_390_TLS_IE32;
938 case R_390_TLS_GOTIE32:
939 if (is_local)
940 return R_390_TLS_LE32;
941 return R_390_TLS_GOTIE32;
942 case R_390_TLS_LDM32:
943 return R_390_TLS_LE32;
944 }
945
946 return r_type;
947 }
948
949 /* Look through the relocs for a section during the first phase, and
950 allocate space in the global offset table or procedure linkage
951 table. */
952
953 static bfd_boolean
954 elf_s390_check_relocs (abfd, info, sec, relocs)
955 bfd *abfd;
956 struct bfd_link_info *info;
957 asection *sec;
958 const Elf_Internal_Rela *relocs;
959 {
960 struct elf_s390_link_hash_table *htab;
961 Elf_Internal_Shdr *symtab_hdr;
962 struct elf_link_hash_entry **sym_hashes;
963 const Elf_Internal_Rela *rel;
964 const Elf_Internal_Rela *rel_end;
965 asection *sreloc;
966 bfd_signed_vma *local_got_refcounts;
967 int tls_type, old_tls_type;
968
969 if (info->relocatable)
970 return TRUE;
971
972 htab = elf_s390_hash_table (info);
973 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
974 sym_hashes = elf_sym_hashes (abfd);
975 local_got_refcounts = elf_local_got_refcounts (abfd);
976
977 sreloc = NULL;
978
979 rel_end = relocs + sec->reloc_count;
980 for (rel = relocs; rel < rel_end; rel++)
981 {
982 unsigned int r_type;
983 unsigned long r_symndx;
984 struct elf_link_hash_entry *h;
985
986 r_symndx = ELF32_R_SYM (rel->r_info);
987
988 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
989 {
990 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
991 abfd, r_symndx);
992 return FALSE;
993 }
994
995 if (r_symndx < symtab_hdr->sh_info)
996 h = NULL;
997 else
998 {
999 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1000 while (h->root.type == bfd_link_hash_indirect
1001 || h->root.type == bfd_link_hash_warning)
1002 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1003 }
1004
1005 /* Create got section and local_got_refcounts array if they
1006 are needed. */
1007 r_type = elf_s390_tls_transition (info,
1008 ELF32_R_TYPE (rel->r_info),
1009 h == NULL);
1010 switch (r_type)
1011 {
1012 case R_390_GOT12:
1013 case R_390_GOT16:
1014 case R_390_GOT20:
1015 case R_390_GOT32:
1016 case R_390_GOTENT:
1017 case R_390_GOTPLT12:
1018 case R_390_GOTPLT16:
1019 case R_390_GOTPLT20:
1020 case R_390_GOTPLT32:
1021 case R_390_GOTPLTENT:
1022 case R_390_TLS_GD32:
1023 case R_390_TLS_GOTIE12:
1024 case R_390_TLS_GOTIE20:
1025 case R_390_TLS_GOTIE32:
1026 case R_390_TLS_IEENT:
1027 case R_390_TLS_IE32:
1028 case R_390_TLS_LDM32:
1029 if (h == NULL
1030 && local_got_refcounts == NULL)
1031 {
1032 bfd_size_type size;
1033
1034 size = symtab_hdr->sh_info;
1035 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1036 local_got_refcounts = ((bfd_signed_vma *)
1037 bfd_zalloc (abfd, size));
1038 if (local_got_refcounts == NULL)
1039 return FALSE;
1040 elf_local_got_refcounts (abfd) = local_got_refcounts;
1041 elf_s390_local_got_tls_type (abfd)
1042 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1043 }
1044 /* Fall through. */
1045 case R_390_GOTOFF16:
1046 case R_390_GOTOFF32:
1047 case R_390_GOTPC:
1048 case R_390_GOTPCDBL:
1049 if (htab->sgot == NULL)
1050 {
1051 if (htab->elf.dynobj == NULL)
1052 htab->elf.dynobj = abfd;
1053 if (!create_got_section (htab->elf.dynobj, info))
1054 return FALSE;
1055 }
1056 }
1057
1058 switch (r_type)
1059 {
1060 case R_390_GOTOFF16:
1061 case R_390_GOTOFF32:
1062 case R_390_GOTPC:
1063 case R_390_GOTPCDBL:
1064 /* Got is created, nothing to be done. */
1065 break;
1066
1067 case R_390_PLT16DBL:
1068 case R_390_PLT32DBL:
1069 case R_390_PLT32:
1070 case R_390_PLTOFF16:
1071 case R_390_PLTOFF32:
1072 /* This symbol requires a procedure linkage table entry. We
1073 actually build the entry in adjust_dynamic_symbol,
1074 because this might be a case of linking PIC code which is
1075 never referenced by a dynamic object, in which case we
1076 don't need to generate a procedure linkage table entry
1077 after all. */
1078
1079 /* If this is a local symbol, we resolve it directly without
1080 creating a procedure linkage table entry. */
1081 if (h != NULL)
1082 {
1083 h->needs_plt = 1;
1084 h->plt.refcount += 1;
1085 }
1086 break;
1087
1088 case R_390_GOTPLT12:
1089 case R_390_GOTPLT16:
1090 case R_390_GOTPLT20:
1091 case R_390_GOTPLT32:
1092 case R_390_GOTPLTENT:
1093 /* This symbol requires either a procedure linkage table entry
1094 or an entry in the local got. We actually build the entry
1095 in adjust_dynamic_symbol because whether this is really a
1096 global reference can change and with it the fact if we have
1097 to create a plt entry or a local got entry. To be able to
1098 make a once global symbol a local one we have to keep track
1099 of the number of gotplt references that exist for this
1100 symbol. */
1101 if (h != NULL)
1102 {
1103 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1104 h->needs_plt = 1;
1105 h->plt.refcount += 1;
1106 }
1107 else
1108 local_got_refcounts[r_symndx] += 1;
1109 break;
1110
1111 case R_390_TLS_LDM32:
1112 htab->tls_ldm_got.refcount += 1;
1113 break;
1114
1115 case R_390_TLS_IE32:
1116 case R_390_TLS_GOTIE12:
1117 case R_390_TLS_GOTIE20:
1118 case R_390_TLS_GOTIE32:
1119 case R_390_TLS_IEENT:
1120 if (info->shared)
1121 info->flags |= DF_STATIC_TLS;
1122 /* Fall through. */
1123
1124 case R_390_GOT12:
1125 case R_390_GOT16:
1126 case R_390_GOT20:
1127 case R_390_GOT32:
1128 case R_390_GOTENT:
1129 case R_390_TLS_GD32:
1130 /* This symbol requires a global offset table entry. */
1131 switch (r_type)
1132 {
1133 default:
1134 case R_390_GOT12:
1135 case R_390_GOT16:
1136 case R_390_GOT20:
1137 case R_390_GOT32:
1138 case R_390_GOTENT:
1139 tls_type = GOT_NORMAL;
1140 break;
1141 case R_390_TLS_GD32:
1142 tls_type = GOT_TLS_GD;
1143 break;
1144 case R_390_TLS_IE32:
1145 case R_390_TLS_GOTIE32:
1146 tls_type = GOT_TLS_IE;
1147 break;
1148 case R_390_TLS_GOTIE12:
1149 case R_390_TLS_GOTIE20:
1150 case R_390_TLS_IEENT:
1151 tls_type = GOT_TLS_IE_NLT;
1152 break;
1153 }
1154
1155 if (h != NULL)
1156 {
1157 h->got.refcount += 1;
1158 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1159 }
1160 else
1161 {
1162 local_got_refcounts[r_symndx] += 1;
1163 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1164 }
1165 /* If a TLS symbol is accessed using IE at least once,
1166 there is no point to use dynamic model for it. */
1167 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1168 {
1169 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1170 {
1171 (*_bfd_error_handler)
1172 (_("%B: `%s' accessed both as normal and thread local symbol"),
1173 abfd, h->root.root.string);
1174 return FALSE;
1175 }
1176 if (old_tls_type > tls_type)
1177 tls_type = old_tls_type;
1178 }
1179
1180 if (old_tls_type != tls_type)
1181 {
1182 if (h != NULL)
1183 elf_s390_hash_entry (h)->tls_type = tls_type;
1184 else
1185 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1186 }
1187
1188 if (r_type != R_390_TLS_IE32)
1189 break;
1190 /* Fall through. */
1191
1192 case R_390_TLS_LE32:
1193 if (!info->shared)
1194 break;
1195 info->flags |= DF_STATIC_TLS;
1196 /* Fall through. */
1197
1198 case R_390_8:
1199 case R_390_16:
1200 case R_390_32:
1201 case R_390_PC16:
1202 case R_390_PC16DBL:
1203 case R_390_PC32DBL:
1204 case R_390_PC32:
1205 if (h != NULL && !info->shared)
1206 {
1207 /* If this reloc is in a read-only section, we might
1208 need a copy reloc. We can't check reliably at this
1209 stage whether the section is read-only, as input
1210 sections have not yet been mapped to output sections.
1211 Tentatively set the flag for now, and correct in
1212 adjust_dynamic_symbol. */
1213 h->non_got_ref = 1;
1214
1215 /* We may need a .plt entry if the function this reloc
1216 refers to is in a shared lib. */
1217 h->plt.refcount += 1;
1218 }
1219
1220 /* If we are creating a shared library, and this is a reloc
1221 against a global symbol, or a non PC relative reloc
1222 against a local symbol, then we need to copy the reloc
1223 into the shared library. However, if we are linking with
1224 -Bsymbolic, we do not need to copy a reloc against a
1225 global symbol which is defined in an object we are
1226 including in the link (i.e., DEF_REGULAR is set). At
1227 this point we have not seen all the input files, so it is
1228 possible that DEF_REGULAR is not set now but will be set
1229 later (it is never cleared). In case of a weak definition,
1230 DEF_REGULAR may be cleared later by a strong definition in
1231 a shared library. We account for that possibility below by
1232 storing information in the relocs_copied field of the hash
1233 table entry. A similar situation occurs when creating
1234 shared libraries and symbol visibility changes render the
1235 symbol local.
1236
1237 If on the other hand, we are creating an executable, we
1238 may need to keep relocations for symbols satisfied by a
1239 dynamic library if we manage to avoid copy relocs for the
1240 symbol. */
1241 if ((info->shared
1242 && (sec->flags & SEC_ALLOC) != 0
1243 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1244 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1245 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1246 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1247 || (h != NULL
1248 && (! info->symbolic
1249 || h->root.type == bfd_link_hash_defweak
1250 || !h->def_regular))))
1251 || (ELIMINATE_COPY_RELOCS
1252 && !info->shared
1253 && (sec->flags & SEC_ALLOC) != 0
1254 && h != NULL
1255 && (h->root.type == bfd_link_hash_defweak
1256 || !h->def_regular)))
1257 {
1258 struct elf_s390_dyn_relocs *p;
1259 struct elf_s390_dyn_relocs **head;
1260
1261 /* We must copy these reloc types into the output file.
1262 Create a reloc section in dynobj and make room for
1263 this reloc. */
1264 if (sreloc == NULL)
1265 {
1266 const char *name;
1267 bfd *dynobj;
1268
1269 name = (bfd_elf_string_from_elf_section
1270 (abfd,
1271 elf_elfheader (abfd)->e_shstrndx,
1272 elf_section_data (sec)->rel_hdr.sh_name));
1273 if (name == NULL)
1274 return FALSE;
1275
1276 if (strncmp (name, ".rela", 5) != 0
1277 || strcmp (bfd_get_section_name (abfd, sec),
1278 name + 5) != 0)
1279 {
1280 (*_bfd_error_handler)
1281 (_("%B: bad relocation section name `%s\'"),
1282 abfd, name);
1283 }
1284
1285 if (htab->elf.dynobj == NULL)
1286 htab->elf.dynobj = abfd;
1287
1288 dynobj = htab->elf.dynobj;
1289 sreloc = bfd_get_section_by_name (dynobj, name);
1290 if (sreloc == NULL)
1291 {
1292 flagword flags;
1293
1294 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1295 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1296 if ((sec->flags & SEC_ALLOC) != 0)
1297 flags |= SEC_ALLOC | SEC_LOAD;
1298 sreloc = bfd_make_section_with_flags (dynobj,
1299 name,
1300 flags);
1301 if (sreloc == NULL
1302 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1303 return FALSE;
1304 }
1305 elf_section_data (sec)->sreloc = sreloc;
1306 }
1307
1308 /* If this is a global symbol, we count the number of
1309 relocations we need for this symbol. */
1310 if (h != NULL)
1311 {
1312 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1313 }
1314 else
1315 {
1316 /* Track dynamic relocs needed for local syms too.
1317 We really need local syms available to do this
1318 easily. Oh well. */
1319 asection *s;
1320 void *vpp;
1321
1322 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1323 sec, r_symndx);
1324 if (s == NULL)
1325 return FALSE;
1326
1327 vpp = &elf_section_data (s)->local_dynrel;
1328 head = (struct elf_s390_dyn_relocs **) vpp;
1329 }
1330
1331 p = *head;
1332 if (p == NULL || p->sec != sec)
1333 {
1334 bfd_size_type amt = sizeof *p;
1335
1336 p = ((struct elf_s390_dyn_relocs *)
1337 bfd_alloc (htab->elf.dynobj, amt));
1338 if (p == NULL)
1339 return FALSE;
1340 p->next = *head;
1341 *head = p;
1342 p->sec = sec;
1343 p->count = 0;
1344 p->pc_count = 0;
1345 }
1346
1347 p->count += 1;
1348 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1349 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1352 p->pc_count += 1;
1353 }
1354 break;
1355
1356 /* This relocation describes the C++ object vtable hierarchy.
1357 Reconstruct it for later use during GC. */
1358 case R_390_GNU_VTINHERIT:
1359 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1360 return FALSE;
1361 break;
1362
1363 /* This relocation describes which C++ vtable entries are actually
1364 used. Record for later use during GC. */
1365 case R_390_GNU_VTENTRY:
1366 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1367 return FALSE;
1368 break;
1369
1370 default:
1371 break;
1372 }
1373 }
1374
1375 return TRUE;
1376 }
1377
1378 /* Return the section that should be marked against GC for a given
1379 relocation. */
1380
1381 static asection *
1382 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1383 asection *sec;
1384 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1385 Elf_Internal_Rela *rel;
1386 struct elf_link_hash_entry *h;
1387 Elf_Internal_Sym *sym;
1388 {
1389 if (h != NULL)
1390 {
1391 switch (ELF32_R_TYPE (rel->r_info))
1392 {
1393 case R_390_GNU_VTINHERIT:
1394 case R_390_GNU_VTENTRY:
1395 break;
1396
1397 default:
1398 switch (h->root.type)
1399 {
1400 case bfd_link_hash_defined:
1401 case bfd_link_hash_defweak:
1402 return h->root.u.def.section;
1403
1404 case bfd_link_hash_common:
1405 return h->root.u.c.p->section;
1406
1407 default:
1408 break;
1409 }
1410 }
1411 }
1412 else
1413 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1414
1415 return NULL;
1416 }
1417
1418 /* Update the got entry reference counts for the section being removed. */
1419
1420 static bfd_boolean
1421 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1422 bfd *abfd;
1423 struct bfd_link_info *info;
1424 asection *sec;
1425 const Elf_Internal_Rela *relocs;
1426 {
1427 Elf_Internal_Shdr *symtab_hdr;
1428 struct elf_link_hash_entry **sym_hashes;
1429 bfd_signed_vma *local_got_refcounts;
1430 const Elf_Internal_Rela *rel, *relend;
1431
1432 elf_section_data (sec)->local_dynrel = NULL;
1433
1434 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1435 sym_hashes = elf_sym_hashes (abfd);
1436 local_got_refcounts = elf_local_got_refcounts (abfd);
1437
1438 relend = relocs + sec->reloc_count;
1439 for (rel = relocs; rel < relend; rel++)
1440 {
1441 unsigned long r_symndx;
1442 unsigned int r_type;
1443 struct elf_link_hash_entry *h = NULL;
1444
1445 r_symndx = ELF32_R_SYM (rel->r_info);
1446 if (r_symndx >= symtab_hdr->sh_info)
1447 {
1448 struct elf_s390_link_hash_entry *eh;
1449 struct elf_s390_dyn_relocs **pp;
1450 struct elf_s390_dyn_relocs *p;
1451
1452 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1453 while (h->root.type == bfd_link_hash_indirect
1454 || h->root.type == bfd_link_hash_warning)
1455 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1456 eh = (struct elf_s390_link_hash_entry *) h;
1457
1458 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1459 if (p->sec == sec)
1460 {
1461 /* Everything must go for SEC. */
1462 *pp = p->next;
1463 break;
1464 }
1465 }
1466
1467 r_type = ELF32_R_TYPE (rel->r_info);
1468 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1469 switch (r_type)
1470 {
1471 case R_390_TLS_LDM32:
1472 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1473 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1474 break;
1475
1476 case R_390_TLS_GD32:
1477 case R_390_TLS_IE32:
1478 case R_390_TLS_GOTIE12:
1479 case R_390_TLS_GOTIE20:
1480 case R_390_TLS_GOTIE32:
1481 case R_390_TLS_IEENT:
1482 case R_390_GOT12:
1483 case R_390_GOT16:
1484 case R_390_GOT20:
1485 case R_390_GOT32:
1486 case R_390_GOTOFF16:
1487 case R_390_GOTOFF32:
1488 case R_390_GOTPC:
1489 case R_390_GOTPCDBL:
1490 case R_390_GOTENT:
1491 if (h != NULL)
1492 {
1493 if (h->got.refcount > 0)
1494 h->got.refcount -= 1;
1495 }
1496 else if (local_got_refcounts != NULL)
1497 {
1498 if (local_got_refcounts[r_symndx] > 0)
1499 local_got_refcounts[r_symndx] -= 1;
1500 }
1501 break;
1502
1503 case R_390_8:
1504 case R_390_12:
1505 case R_390_16:
1506 case R_390_20:
1507 case R_390_32:
1508 case R_390_PC16:
1509 case R_390_PC16DBL:
1510 case R_390_PC32DBL:
1511 case R_390_PC32:
1512 if (info->shared)
1513 break;
1514 /* Fall through. */
1515
1516 case R_390_PLT16DBL:
1517 case R_390_PLT32DBL:
1518 case R_390_PLT32:
1519 case R_390_PLTOFF16:
1520 case R_390_PLTOFF32:
1521 if (h != NULL)
1522 {
1523 if (h->plt.refcount > 0)
1524 h->plt.refcount -= 1;
1525 }
1526 break;
1527
1528 case R_390_GOTPLT12:
1529 case R_390_GOTPLT16:
1530 case R_390_GOTPLT20:
1531 case R_390_GOTPLT32:
1532 case R_390_GOTPLTENT:
1533 if (h != NULL)
1534 {
1535 if (h->plt.refcount > 0)
1536 {
1537 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1538 h->plt.refcount -= 1;
1539 }
1540 }
1541 else if (local_got_refcounts != NULL)
1542 {
1543 if (local_got_refcounts[r_symndx] > 0)
1544 local_got_refcounts[r_symndx] -= 1;
1545 }
1546 break;
1547
1548 default:
1549 break;
1550 }
1551 }
1552
1553 return TRUE;
1554 }
1555
1556 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1557 entry but we found we will not create any. Called when we find we will
1558 not have any PLT for this symbol, by for example
1559 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1560 or elf_s390_size_dynamic_sections if no dynamic sections will be
1561 created (we're only linking static objects). */
1562
1563 static void
1564 elf_s390_adjust_gotplt (h)
1565 struct elf_s390_link_hash_entry *h;
1566 {
1567 if (h->elf.root.type == bfd_link_hash_warning)
1568 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1569
1570 if (h->gotplt_refcount <= 0)
1571 return;
1572
1573 /* We simply add the number of gotplt references to the number
1574 * of got references for this symbol. */
1575 h->elf.got.refcount += h->gotplt_refcount;
1576 h->gotplt_refcount = -1;
1577 }
1578
1579 /* Adjust a symbol defined by a dynamic object and referenced by a
1580 regular object. The current definition is in some section of the
1581 dynamic object, but we're not including those sections. We have to
1582 change the definition to something the rest of the link can
1583 understand. */
1584
1585 static bfd_boolean
1586 elf_s390_adjust_dynamic_symbol (info, h)
1587 struct bfd_link_info *info;
1588 struct elf_link_hash_entry *h;
1589 {
1590 struct elf_s390_link_hash_table *htab;
1591 asection *s;
1592 unsigned int power_of_two;
1593
1594 /* If this is a function, put it in the procedure linkage table. We
1595 will fill in the contents of the procedure linkage table later
1596 (although we could actually do it here). */
1597 if (h->type == STT_FUNC
1598 || h->needs_plt)
1599 {
1600 if (h->plt.refcount <= 0
1601 || (! info->shared
1602 && !h->def_dynamic
1603 && !h->ref_dynamic
1604 && h->root.type != bfd_link_hash_undefweak
1605 && h->root.type != bfd_link_hash_undefined))
1606 {
1607 /* This case can occur if we saw a PLT32 reloc in an input
1608 file, but the symbol was never referred to by a dynamic
1609 object, or if all references were garbage collected. In
1610 such a case, we don't actually need to build a procedure
1611 linkage table, and we can just do a PC32 reloc instead. */
1612 h->plt.offset = (bfd_vma) -1;
1613 h->needs_plt = 0;
1614 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1615 }
1616
1617 return TRUE;
1618 }
1619 else
1620 /* It's possible that we incorrectly decided a .plt reloc was
1621 needed for an R_390_PC32 reloc to a non-function sym in
1622 check_relocs. We can't decide accurately between function and
1623 non-function syms in check-relocs; Objects loaded later in
1624 the link may change h->type. So fix it now. */
1625 h->plt.offset = (bfd_vma) -1;
1626
1627 /* If this is a weak symbol, and there is a real definition, the
1628 processor independent code will have arranged for us to see the
1629 real definition first, and we can just use the same value. */
1630 if (h->u.weakdef != NULL)
1631 {
1632 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1633 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1634 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1635 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1636 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1637 h->non_got_ref = h->u.weakdef->non_got_ref;
1638 return TRUE;
1639 }
1640
1641 /* This is a reference to a symbol defined by a dynamic object which
1642 is not a function. */
1643
1644 /* If we are creating a shared library, we must presume that the
1645 only references to the symbol are via the global offset table.
1646 For such cases we need not do anything here; the relocations will
1647 be handled correctly by relocate_section. */
1648 if (info->shared)
1649 return TRUE;
1650
1651 /* If there are no references to this symbol that do not use the
1652 GOT, we don't need to generate a copy reloc. */
1653 if (!h->non_got_ref)
1654 return TRUE;
1655
1656 /* If -z nocopyreloc was given, we won't generate them either. */
1657 if (info->nocopyreloc)
1658 {
1659 h->non_got_ref = 0;
1660 return TRUE;
1661 }
1662
1663 if (ELIMINATE_COPY_RELOCS)
1664 {
1665 struct elf_s390_link_hash_entry * eh;
1666 struct elf_s390_dyn_relocs *p;
1667
1668 eh = (struct elf_s390_link_hash_entry *) h;
1669 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1670 {
1671 s = p->sec->output_section;
1672 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1673 break;
1674 }
1675
1676 /* If we didn't find any dynamic relocs in read-only sections, then
1677 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1678 if (p == NULL)
1679 {
1680 h->non_got_ref = 0;
1681 return TRUE;
1682 }
1683 }
1684
1685 if (h->size == 0)
1686 {
1687 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1688 h->root.root.string);
1689 return TRUE;
1690 }
1691
1692 /* We must allocate the symbol in our .dynbss section, which will
1693 become part of the .bss section of the executable. There will be
1694 an entry for this symbol in the .dynsym section. The dynamic
1695 object will contain position independent code, so all references
1696 from the dynamic object to this symbol will go through the global
1697 offset table. The dynamic linker will use the .dynsym entry to
1698 determine the address it must put in the global offset table, so
1699 both the dynamic object and the regular object will refer to the
1700 same memory location for the variable. */
1701
1702 htab = elf_s390_hash_table (info);
1703
1704 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1705 copy the initial value out of the dynamic object and into the
1706 runtime process image. */
1707 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1708 {
1709 htab->srelbss->size += sizeof (Elf32_External_Rela);
1710 h->needs_copy = 1;
1711 }
1712
1713 /* We need to figure out the alignment required for this symbol. I
1714 have no idea how ELF linkers handle this. */
1715 power_of_two = bfd_log2 (h->size);
1716 if (power_of_two > 3)
1717 power_of_two = 3;
1718
1719 /* Apply the required alignment. */
1720 s = htab->sdynbss;
1721 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1722 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1723 {
1724 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1725 return FALSE;
1726 }
1727
1728 /* Define the symbol as being at this point in the section. */
1729 h->root.u.def.section = s;
1730 h->root.u.def.value = s->size;
1731
1732 /* Increment the section size to make room for the symbol. */
1733 s->size += h->size;
1734
1735 return TRUE;
1736 }
1737
1738 /* Allocate space in .plt, .got and associated reloc sections for
1739 dynamic relocs. */
1740
1741 static bfd_boolean
1742 allocate_dynrelocs (h, inf)
1743 struct elf_link_hash_entry *h;
1744 PTR inf;
1745 {
1746 struct bfd_link_info *info;
1747 struct elf_s390_link_hash_table *htab;
1748 struct elf_s390_link_hash_entry *eh;
1749 struct elf_s390_dyn_relocs *p;
1750
1751 if (h->root.type == bfd_link_hash_indirect)
1752 return TRUE;
1753
1754 if (h->root.type == bfd_link_hash_warning)
1755 /* When warning symbols are created, they **replace** the "real"
1756 entry in the hash table, thus we never get to see the real
1757 symbol in a hash traversal. So look at it now. */
1758 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1759
1760 info = (struct bfd_link_info *) inf;
1761 htab = elf_s390_hash_table (info);
1762
1763 if (htab->elf.dynamic_sections_created
1764 && h->plt.refcount > 0
1765 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1766 || h->root.type != bfd_link_hash_undefweak))
1767 {
1768 /* Make sure this symbol is output as a dynamic symbol.
1769 Undefined weak syms won't yet be marked as dynamic. */
1770 if (h->dynindx == -1
1771 && !h->forced_local)
1772 {
1773 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1774 return FALSE;
1775 }
1776
1777 if (info->shared
1778 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1779 {
1780 asection *s = htab->splt;
1781
1782 /* If this is the first .plt entry, make room for the special
1783 first entry. */
1784 if (s->size == 0)
1785 s->size += PLT_FIRST_ENTRY_SIZE;
1786
1787 h->plt.offset = s->size;
1788
1789 /* If this symbol is not defined in a regular file, and we are
1790 not generating a shared library, then set the symbol to this
1791 location in the .plt. This is required to make function
1792 pointers compare as equal between the normal executable and
1793 the shared library. */
1794 if (! info->shared
1795 && !h->def_regular)
1796 {
1797 h->root.u.def.section = s;
1798 h->root.u.def.value = h->plt.offset;
1799 }
1800
1801 /* Make room for this entry. */
1802 s->size += PLT_ENTRY_SIZE;
1803
1804 /* We also need to make an entry in the .got.plt section, which
1805 will be placed in the .got section by the linker script. */
1806 htab->sgotplt->size += GOT_ENTRY_SIZE;
1807
1808 /* We also need to make an entry in the .rela.plt section. */
1809 htab->srelplt->size += sizeof (Elf32_External_Rela);
1810 }
1811 else
1812 {
1813 h->plt.offset = (bfd_vma) -1;
1814 h->needs_plt = 0;
1815 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1816 }
1817 }
1818 else
1819 {
1820 h->plt.offset = (bfd_vma) -1;
1821 h->needs_plt = 0;
1822 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1823 }
1824
1825 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1826 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1827 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1828 we can save the dynamic TLS relocation. */
1829 if (h->got.refcount > 0
1830 && !info->shared
1831 && h->dynindx == -1
1832 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1833 {
1834 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1835 /* For the GOTIE access without a literal pool entry the offset has
1836 to be stored somewhere. The immediate value in the instruction
1837 is not bit enough so the value is stored in the got. */
1838 {
1839 h->got.offset = htab->sgot->size;
1840 htab->sgot->size += GOT_ENTRY_SIZE;
1841 }
1842 else
1843 h->got.offset = (bfd_vma) -1;
1844 }
1845 else if (h->got.refcount > 0)
1846 {
1847 asection *s;
1848 bfd_boolean dyn;
1849 int tls_type = elf_s390_hash_entry(h)->tls_type;
1850
1851 /* Make sure this symbol is output as a dynamic symbol.
1852 Undefined weak syms won't yet be marked as dynamic. */
1853 if (h->dynindx == -1
1854 && !h->forced_local)
1855 {
1856 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1857 return FALSE;
1858 }
1859
1860 s = htab->sgot;
1861 h->got.offset = s->size;
1862 s->size += GOT_ENTRY_SIZE;
1863 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1864 if (tls_type == GOT_TLS_GD)
1865 s->size += GOT_ENTRY_SIZE;
1866 dyn = htab->elf.dynamic_sections_created;
1867 /* R_390_TLS_IE32 needs one dynamic relocation,
1868 R_390_TLS_GD32 needs one if local symbol and two if global. */
1869 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1870 || tls_type >= GOT_TLS_IE)
1871 htab->srelgot->size += sizeof (Elf32_External_Rela);
1872 else if (tls_type == GOT_TLS_GD)
1873 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1874 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1875 || h->root.type != bfd_link_hash_undefweak)
1876 && (info->shared
1877 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1878 htab->srelgot->size += sizeof (Elf32_External_Rela);
1879 }
1880 else
1881 h->got.offset = (bfd_vma) -1;
1882
1883 eh = (struct elf_s390_link_hash_entry *) h;
1884 if (eh->dyn_relocs == NULL)
1885 return TRUE;
1886
1887 /* In the shared -Bsymbolic case, discard space allocated for
1888 dynamic pc-relative relocs against symbols which turn out to be
1889 defined in regular objects. For the normal shared case, discard
1890 space for pc-relative relocs that have become local due to symbol
1891 visibility changes. */
1892
1893 if (info->shared)
1894 {
1895 if (SYMBOL_REFERENCES_LOCAL (info, h))
1896 {
1897 struct elf_s390_dyn_relocs **pp;
1898
1899 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1900 {
1901 p->count -= p->pc_count;
1902 p->pc_count = 0;
1903 if (p->count == 0)
1904 *pp = p->next;
1905 else
1906 pp = &p->next;
1907 }
1908 }
1909
1910 /* Also discard relocs on undefined weak syms with non-default
1911 visibility. */
1912 if (eh->dyn_relocs != NULL
1913 && h->root.type == bfd_link_hash_undefweak)
1914 {
1915 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1916 eh->dyn_relocs = NULL;
1917
1918 /* Make sure undefined weak symbols are output as a dynamic
1919 symbol in PIEs. */
1920 else if (h->dynindx == -1
1921 && !h->forced_local)
1922 {
1923 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1924 return FALSE;
1925 }
1926 }
1927 }
1928 else if (ELIMINATE_COPY_RELOCS)
1929 {
1930 /* For the non-shared case, discard space for relocs against
1931 symbols which turn out to need copy relocs or are not
1932 dynamic. */
1933
1934 if (!h->non_got_ref
1935 && ((h->def_dynamic
1936 && !h->def_regular)
1937 || (htab->elf.dynamic_sections_created
1938 && (h->root.type == bfd_link_hash_undefweak
1939 || h->root.type == bfd_link_hash_undefined))))
1940 {
1941 /* Make sure this symbol is output as a dynamic symbol.
1942 Undefined weak syms won't yet be marked as dynamic. */
1943 if (h->dynindx == -1
1944 && !h->forced_local)
1945 {
1946 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1947 return FALSE;
1948 }
1949
1950 /* If that succeeded, we know we'll be keeping all the
1951 relocs. */
1952 if (h->dynindx != -1)
1953 goto keep;
1954 }
1955
1956 eh->dyn_relocs = NULL;
1957
1958 keep: ;
1959 }
1960
1961 /* Finally, allocate space. */
1962 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1963 {
1964 asection *sreloc = elf_section_data (p->sec)->sreloc;
1965
1966 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1967 }
1968
1969 return TRUE;
1970 }
1971
1972 /* Find any dynamic relocs that apply to read-only sections. */
1973
1974 static bfd_boolean
1975 readonly_dynrelocs (h, inf)
1976 struct elf_link_hash_entry *h;
1977 PTR inf;
1978 {
1979 struct elf_s390_link_hash_entry *eh;
1980 struct elf_s390_dyn_relocs *p;
1981
1982 if (h->root.type == bfd_link_hash_warning)
1983 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1984
1985 eh = (struct elf_s390_link_hash_entry *) h;
1986 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1987 {
1988 asection *s = p->sec->output_section;
1989
1990 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1991 {
1992 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1993
1994 info->flags |= DF_TEXTREL;
1995
1996 /* Not an error, just cut short the traversal. */
1997 return FALSE;
1998 }
1999 }
2000 return TRUE;
2001 }
2002
2003 /* Set the sizes of the dynamic sections. */
2004
2005 static bfd_boolean
2006 elf_s390_size_dynamic_sections (output_bfd, info)
2007 bfd *output_bfd ATTRIBUTE_UNUSED;
2008 struct bfd_link_info *info;
2009 {
2010 struct elf_s390_link_hash_table *htab;
2011 bfd *dynobj;
2012 asection *s;
2013 bfd_boolean relocs;
2014 bfd *ibfd;
2015
2016 htab = elf_s390_hash_table (info);
2017 dynobj = htab->elf.dynobj;
2018 if (dynobj == NULL)
2019 abort ();
2020
2021 if (htab->elf.dynamic_sections_created)
2022 {
2023 /* Set the contents of the .interp section to the interpreter. */
2024 if (info->executable)
2025 {
2026 s = bfd_get_section_by_name (dynobj, ".interp");
2027 if (s == NULL)
2028 abort ();
2029 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2030 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2031 }
2032 }
2033
2034 /* Set up .got offsets for local syms, and space for local dynamic
2035 relocs. */
2036 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2037 {
2038 bfd_signed_vma *local_got;
2039 bfd_signed_vma *end_local_got;
2040 char *local_tls_type;
2041 bfd_size_type locsymcount;
2042 Elf_Internal_Shdr *symtab_hdr;
2043 asection *srela;
2044
2045 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2046 continue;
2047
2048 for (s = ibfd->sections; s != NULL; s = s->next)
2049 {
2050 struct elf_s390_dyn_relocs *p;
2051
2052 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2053 {
2054 if (!bfd_is_abs_section (p->sec)
2055 && bfd_is_abs_section (p->sec->output_section))
2056 {
2057 /* Input section has been discarded, either because
2058 it is a copy of a linkonce section or due to
2059 linker script /DISCARD/, so we'll be discarding
2060 the relocs too. */
2061 }
2062 else if (p->count != 0)
2063 {
2064 srela = elf_section_data (p->sec)->sreloc;
2065 srela->size += p->count * sizeof (Elf32_External_Rela);
2066 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2067 info->flags |= DF_TEXTREL;
2068 }
2069 }
2070 }
2071
2072 local_got = elf_local_got_refcounts (ibfd);
2073 if (!local_got)
2074 continue;
2075
2076 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2077 locsymcount = symtab_hdr->sh_info;
2078 end_local_got = local_got + locsymcount;
2079 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2080 s = htab->sgot;
2081 srela = htab->srelgot;
2082 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2083 {
2084 if (*local_got > 0)
2085 {
2086 *local_got = s->size;
2087 s->size += GOT_ENTRY_SIZE;
2088 if (*local_tls_type == GOT_TLS_GD)
2089 s->size += GOT_ENTRY_SIZE;
2090 if (info->shared)
2091 srela->size += sizeof (Elf32_External_Rela);
2092 }
2093 else
2094 *local_got = (bfd_vma) -1;
2095 }
2096 }
2097
2098 if (htab->tls_ldm_got.refcount > 0)
2099 {
2100 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2101 relocs. */
2102 htab->tls_ldm_got.offset = htab->sgot->size;
2103 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2104 htab->srelgot->size += sizeof (Elf32_External_Rela);
2105 }
2106 else
2107 htab->tls_ldm_got.offset = -1;
2108
2109 /* Allocate global sym .plt and .got entries, and space for global
2110 sym dynamic relocs. */
2111 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2112
2113 /* We now have determined the sizes of the various dynamic sections.
2114 Allocate memory for them. */
2115 relocs = FALSE;
2116 for (s = dynobj->sections; s != NULL; s = s->next)
2117 {
2118 if ((s->flags & SEC_LINKER_CREATED) == 0)
2119 continue;
2120
2121 if (s == htab->splt
2122 || s == htab->sgot
2123 || s == htab->sgotplt
2124 || s == htab->sdynbss)
2125 {
2126 /* Strip this section if we don't need it; see the
2127 comment below. */
2128 }
2129 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2130 {
2131 if (s->size != 0)
2132 relocs = TRUE;
2133
2134 /* We use the reloc_count field as a counter if we need
2135 to copy relocs into the output file. */
2136 s->reloc_count = 0;
2137 }
2138 else
2139 {
2140 /* It's not one of our sections, so don't allocate space. */
2141 continue;
2142 }
2143
2144 if (s->size == 0)
2145 {
2146 /* If we don't need this section, strip it from the
2147 output file. This is to handle .rela.bss and
2148 .rela.plt. We must create it in
2149 create_dynamic_sections, because it must be created
2150 before the linker maps input sections to output
2151 sections. The linker does that before
2152 adjust_dynamic_symbol is called, and it is that
2153 function which decides whether anything needs to go
2154 into these sections. */
2155
2156 s->flags |= SEC_EXCLUDE;
2157 continue;
2158 }
2159
2160 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2161 continue;
2162
2163 /* Allocate memory for the section contents. We use bfd_zalloc
2164 here in case unused entries are not reclaimed before the
2165 section's contents are written out. This should not happen,
2166 but this way if it does, we get a R_390_NONE reloc instead
2167 of garbage. */
2168 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2169 if (s->contents == NULL)
2170 return FALSE;
2171 }
2172
2173 if (htab->elf.dynamic_sections_created)
2174 {
2175 /* Add some entries to the .dynamic section. We fill in the
2176 values later, in elf_s390_finish_dynamic_sections, but we
2177 must add the entries now so that we get the correct size for
2178 the .dynamic section. The DT_DEBUG entry is filled in by the
2179 dynamic linker and used by the debugger. */
2180 #define add_dynamic_entry(TAG, VAL) \
2181 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2182
2183 if (info->executable)
2184 {
2185 if (!add_dynamic_entry (DT_DEBUG, 0))
2186 return FALSE;
2187 }
2188
2189 if (htab->splt->size != 0)
2190 {
2191 if (!add_dynamic_entry (DT_PLTGOT, 0)
2192 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2193 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2194 || !add_dynamic_entry (DT_JMPREL, 0))
2195 return FALSE;
2196 }
2197
2198 if (relocs)
2199 {
2200 if (!add_dynamic_entry (DT_RELA, 0)
2201 || !add_dynamic_entry (DT_RELASZ, 0)
2202 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2203 return FALSE;
2204
2205 /* If any dynamic relocs apply to a read-only section,
2206 then we need a DT_TEXTREL entry. */
2207 if ((info->flags & DF_TEXTREL) == 0)
2208 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2209 (PTR) info);
2210
2211 if ((info->flags & DF_TEXTREL) != 0)
2212 {
2213 if (!add_dynamic_entry (DT_TEXTREL, 0))
2214 return FALSE;
2215 }
2216 }
2217 }
2218 #undef add_dynamic_entry
2219
2220 return TRUE;
2221 }
2222
2223 /* Return the base VMA address which should be subtracted from real addresses
2224 when resolving @dtpoff relocation.
2225 This is PT_TLS segment p_vaddr. */
2226
2227 static bfd_vma
2228 dtpoff_base (info)
2229 struct bfd_link_info *info;
2230 {
2231 /* If tls_sec is NULL, we should have signalled an error already. */
2232 if (elf_hash_table (info)->tls_sec == NULL)
2233 return 0;
2234 return elf_hash_table (info)->tls_sec->vma;
2235 }
2236
2237 /* Return the relocation value for @tpoff relocation
2238 if STT_TLS virtual address is ADDRESS. */
2239
2240 static bfd_vma
2241 tpoff (info, address)
2242 struct bfd_link_info *info;
2243 bfd_vma address;
2244 {
2245 struct elf_link_hash_table *htab = elf_hash_table (info);
2246
2247 /* If tls_sec is NULL, we should have signalled an error already. */
2248 if (htab->tls_sec == NULL)
2249 return 0;
2250 return htab->tls_size + htab->tls_sec->vma - address;
2251 }
2252
2253 /* Complain if TLS instruction relocation is against an invalid
2254 instruction. */
2255
2256 static void
2257 invalid_tls_insn (input_bfd, input_section, rel)
2258 bfd *input_bfd;
2259 asection *input_section;
2260 Elf_Internal_Rela *rel;
2261 {
2262 reloc_howto_type *howto;
2263
2264 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2265 (*_bfd_error_handler)
2266 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2267 input_bfd,
2268 input_section,
2269 (long) rel->r_offset,
2270 howto->name);
2271 bfd_set_error (bfd_error_bad_value);
2272 }
2273
2274 /* Relocate a 390 ELF section. */
2275
2276 static bfd_boolean
2277 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2278 contents, relocs, local_syms, local_sections)
2279 bfd *output_bfd;
2280 struct bfd_link_info *info;
2281 bfd *input_bfd;
2282 asection *input_section;
2283 bfd_byte *contents;
2284 Elf_Internal_Rela *relocs;
2285 Elf_Internal_Sym *local_syms;
2286 asection **local_sections;
2287 {
2288 struct elf_s390_link_hash_table *htab;
2289 Elf_Internal_Shdr *symtab_hdr;
2290 struct elf_link_hash_entry **sym_hashes;
2291 bfd_vma *local_got_offsets;
2292 Elf_Internal_Rela *rel;
2293 Elf_Internal_Rela *relend;
2294
2295 if (info->relocatable)
2296 return TRUE;
2297
2298 htab = elf_s390_hash_table (info);
2299 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2300 sym_hashes = elf_sym_hashes (input_bfd);
2301 local_got_offsets = elf_local_got_offsets (input_bfd);
2302
2303 rel = relocs;
2304 relend = relocs + input_section->reloc_count;
2305 for (; rel < relend; rel++)
2306 {
2307 unsigned int r_type;
2308 reloc_howto_type *howto;
2309 unsigned long r_symndx;
2310 struct elf_link_hash_entry *h;
2311 Elf_Internal_Sym *sym;
2312 asection *sec;
2313 bfd_vma off;
2314 bfd_vma relocation;
2315 bfd_boolean unresolved_reloc;
2316 bfd_reloc_status_type r;
2317 int tls_type;
2318
2319 r_type = ELF32_R_TYPE (rel->r_info);
2320 if (r_type == (int) R_390_GNU_VTINHERIT
2321 || r_type == (int) R_390_GNU_VTENTRY)
2322 continue;
2323 if (r_type >= (int) R_390_max)
2324 {
2325 bfd_set_error (bfd_error_bad_value);
2326 return FALSE;
2327 }
2328
2329 howto = elf_howto_table + r_type;
2330 r_symndx = ELF32_R_SYM (rel->r_info);
2331
2332 /* This is a final link. */
2333 h = NULL;
2334 sym = NULL;
2335 sec = NULL;
2336 unresolved_reloc = FALSE;
2337 if (r_symndx < symtab_hdr->sh_info)
2338 {
2339 sym = local_syms + r_symndx;
2340 sec = local_sections[r_symndx];
2341 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2342 }
2343 else
2344 {
2345 bfd_boolean warned ATTRIBUTE_UNUSED;
2346
2347 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2348 r_symndx, symtab_hdr, sym_hashes,
2349 h, sec, relocation,
2350 unresolved_reloc, warned);
2351 }
2352
2353 switch (r_type)
2354 {
2355 case R_390_GOTPLT12:
2356 case R_390_GOTPLT16:
2357 case R_390_GOTPLT20:
2358 case R_390_GOTPLT32:
2359 case R_390_GOTPLTENT:
2360 /* There are three cases for a GOTPLT relocation. 1) The
2361 relocation is against the jump slot entry of a plt that
2362 will get emitted to the output file. 2) The relocation
2363 is against the jump slot of a plt entry that has been
2364 removed. elf_s390_adjust_gotplt has created a GOT entry
2365 as replacement. 3) The relocation is against a local symbol.
2366 Cases 2) and 3) are the same as the GOT relocation code
2367 so we just have to test for case 1 and fall through for
2368 the other two. */
2369 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2370 {
2371 bfd_vma plt_index;
2372
2373 /* Calc. index no.
2374 Current offset - size first entry / entry size. */
2375 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2376 PLT_ENTRY_SIZE;
2377
2378 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2379 addr & GOT addr. */
2380 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2381 unresolved_reloc = FALSE;
2382
2383 if (r_type == R_390_GOTPLTENT)
2384 relocation += htab->sgot->output_section->vma;
2385 break;
2386 }
2387 /* Fall through. */
2388
2389 case R_390_GOT12:
2390 case R_390_GOT16:
2391 case R_390_GOT20:
2392 case R_390_GOT32:
2393 case R_390_GOTENT:
2394 /* Relocation is to the entry for this symbol in the global
2395 offset table. */
2396 if (htab->sgot == NULL)
2397 abort ();
2398
2399 if (h != NULL)
2400 {
2401 bfd_boolean dyn;
2402
2403 off = h->got.offset;
2404 dyn = htab->elf.dynamic_sections_created;
2405 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2406 || (info->shared
2407 && (info->symbolic
2408 || h->dynindx == -1
2409 || h->forced_local)
2410 && h->def_regular)
2411 || (ELF_ST_VISIBILITY (h->other)
2412 && h->root.type == bfd_link_hash_undefweak))
2413 {
2414 /* This is actually a static link, or it is a
2415 -Bsymbolic link and the symbol is defined
2416 locally, or the symbol was forced to be local
2417 because of a version file. We must initialize
2418 this entry in the global offset table. Since the
2419 offset must always be a multiple of 2, we use the
2420 least significant bit to record whether we have
2421 initialized it already.
2422
2423 When doing a dynamic link, we create a .rel.got
2424 relocation entry to initialize the value. This
2425 is done in the finish_dynamic_symbol routine. */
2426 if ((off & 1) != 0)
2427 off &= ~1;
2428 else
2429 {
2430 bfd_put_32 (output_bfd, relocation,
2431 htab->sgot->contents + off);
2432 h->got.offset |= 1;
2433 }
2434 }
2435 else
2436 unresolved_reloc = FALSE;
2437 }
2438 else
2439 {
2440 if (local_got_offsets == NULL)
2441 abort ();
2442
2443 off = local_got_offsets[r_symndx];
2444
2445 /* The offset must always be a multiple of 4. We use
2446 the least significant bit to record whether we have
2447 already generated the necessary reloc. */
2448 if ((off & 1) != 0)
2449 off &= ~1;
2450 else
2451 {
2452 bfd_put_32 (output_bfd, relocation,
2453 htab->sgot->contents + off);
2454
2455 if (info->shared)
2456 {
2457 asection *srelgot;
2458 Elf_Internal_Rela outrel;
2459 bfd_byte *loc;
2460
2461 srelgot = htab->srelgot;
2462 if (srelgot == NULL)
2463 abort ();
2464
2465 outrel.r_offset = (htab->sgot->output_section->vma
2466 + htab->sgot->output_offset
2467 + off);
2468 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2469 outrel.r_addend = relocation;
2470 loc = srelgot->contents;
2471 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2472 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2473 }
2474
2475 local_got_offsets[r_symndx] |= 1;
2476 }
2477 }
2478
2479 if (off >= (bfd_vma) -2)
2480 abort ();
2481
2482 relocation = htab->sgot->output_offset + off;
2483
2484 /* For @GOTENT the relocation is against the offset between
2485 the instruction and the symbols entry in the GOT and not
2486 between the start of the GOT and the symbols entry. We
2487 add the vma of the GOT to get the correct value. */
2488 if ( r_type == R_390_GOTENT
2489 || r_type == R_390_GOTPLTENT)
2490 relocation += htab->sgot->output_section->vma;
2491
2492 break;
2493
2494 case R_390_GOTOFF16:
2495 case R_390_GOTOFF32:
2496 /* Relocation is relative to the start of the global offset
2497 table. */
2498
2499 /* Note that sgot->output_offset is not involved in this
2500 calculation. We always want the start of .got. If we
2501 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2502 permitted by the ABI, we might have to change this
2503 calculation. */
2504 relocation -= htab->sgot->output_section->vma;
2505 break;
2506
2507 case R_390_GOTPC:
2508 case R_390_GOTPCDBL:
2509 /* Use global offset table as symbol value. */
2510 relocation = htab->sgot->output_section->vma;
2511 unresolved_reloc = FALSE;
2512 break;
2513
2514 case R_390_PLT16DBL:
2515 case R_390_PLT32DBL:
2516 case R_390_PLT32:
2517 /* Relocation is to the entry for this symbol in the
2518 procedure linkage table. */
2519
2520 /* Resolve a PLT32 reloc against a local symbol directly,
2521 without using the procedure linkage table. */
2522 if (h == NULL)
2523 break;
2524
2525 if (h->plt.offset == (bfd_vma) -1
2526 || htab->splt == NULL)
2527 {
2528 /* We didn't make a PLT entry for this symbol. This
2529 happens when statically linking PIC code, or when
2530 using -Bsymbolic. */
2531 break;
2532 }
2533
2534 relocation = (htab->splt->output_section->vma
2535 + htab->splt->output_offset
2536 + h->plt.offset);
2537 unresolved_reloc = FALSE;
2538 break;
2539
2540 case R_390_PLTOFF16:
2541 case R_390_PLTOFF32:
2542 /* Relocation is to the entry for this symbol in the
2543 procedure linkage table relative to the start of the GOT. */
2544
2545 /* For local symbols or if we didn't make a PLT entry for
2546 this symbol resolve the symbol directly. */
2547 if ( h == NULL
2548 || h->plt.offset == (bfd_vma) -1
2549 || htab->splt == NULL)
2550 {
2551 relocation -= htab->sgot->output_section->vma;
2552 break;
2553 }
2554
2555 relocation = (htab->splt->output_section->vma
2556 + htab->splt->output_offset
2557 + h->plt.offset
2558 - htab->sgot->output_section->vma);
2559 unresolved_reloc = FALSE;
2560 break;
2561
2562 case R_390_8:
2563 case R_390_16:
2564 case R_390_32:
2565 case R_390_PC16:
2566 case R_390_PC16DBL:
2567 case R_390_PC32DBL:
2568 case R_390_PC32:
2569 /* r_symndx will be zero only for relocs against symbols
2570 from removed linkonce sections, or sections discarded by
2571 a linker script. */
2572 if (r_symndx == 0
2573 || (input_section->flags & SEC_ALLOC) == 0)
2574 break;
2575
2576 if ((info->shared
2577 && (h == NULL
2578 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2579 || h->root.type != bfd_link_hash_undefweak)
2580 && ((r_type != R_390_PC16
2581 && r_type != R_390_PC16DBL
2582 && r_type != R_390_PC32DBL
2583 && r_type != R_390_PC32)
2584 || (h != NULL
2585 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2586 || (ELIMINATE_COPY_RELOCS
2587 && !info->shared
2588 && h != NULL
2589 && h->dynindx != -1
2590 && !h->non_got_ref
2591 && ((h->def_dynamic
2592 && !h->def_regular)
2593 || h->root.type == bfd_link_hash_undefweak
2594 || h->root.type == bfd_link_hash_undefined)))
2595 {
2596 Elf_Internal_Rela outrel;
2597 bfd_boolean skip, relocate;
2598 asection *sreloc;
2599 bfd_byte *loc;
2600
2601 /* When generating a shared object, these relocations
2602 are copied into the output file to be resolved at run
2603 time. */
2604
2605 skip = FALSE;
2606 relocate = FALSE;
2607
2608 outrel.r_offset =
2609 _bfd_elf_section_offset (output_bfd, info, input_section,
2610 rel->r_offset);
2611 if (outrel.r_offset == (bfd_vma) -1)
2612 skip = TRUE;
2613 else if (outrel.r_offset == (bfd_vma) -2)
2614 skip = TRUE, relocate = TRUE;
2615 outrel.r_offset += (input_section->output_section->vma
2616 + input_section->output_offset);
2617
2618 if (skip)
2619 memset (&outrel, 0, sizeof outrel);
2620 else if (h != NULL
2621 && h->dynindx != -1
2622 && (r_type == R_390_PC16
2623 || r_type == R_390_PC16DBL
2624 || r_type == R_390_PC32DBL
2625 || r_type == R_390_PC32
2626 || !info->shared
2627 || !info->symbolic
2628 || !h->def_regular))
2629 {
2630 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2631 outrel.r_addend = rel->r_addend;
2632 }
2633 else
2634 {
2635 /* This symbol is local, or marked to become local. */
2636 outrel.r_addend = relocation + rel->r_addend;
2637 if (r_type == R_390_32)
2638 {
2639 relocate = TRUE;
2640 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2641 }
2642 else
2643 {
2644 long sindx;
2645
2646 if (bfd_is_abs_section (sec))
2647 sindx = 0;
2648 else if (sec == NULL || sec->owner == NULL)
2649 {
2650 bfd_set_error(bfd_error_bad_value);
2651 return FALSE;
2652 }
2653 else
2654 {
2655 asection *osec;
2656
2657 osec = sec->output_section;
2658 sindx = elf_section_data (osec)->dynindx;
2659 BFD_ASSERT (sindx > 0);
2660
2661 /* We are turning this relocation into one
2662 against a section symbol, so subtract out
2663 the output section's address but not the
2664 offset of the input section in the output
2665 section. */
2666
2667 outrel.r_addend -= osec->vma;
2668 }
2669 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2670 }
2671 }
2672
2673 sreloc = elf_section_data (input_section)->sreloc;
2674 if (sreloc == NULL)
2675 abort ();
2676
2677 loc = sreloc->contents;
2678 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2679 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2680
2681 /* If this reloc is against an external symbol, we do
2682 not want to fiddle with the addend. Otherwise, we
2683 need to include the symbol value so that it becomes
2684 an addend for the dynamic reloc. */
2685 if (! relocate)
2686 continue;
2687 }
2688 break;
2689
2690 /* Relocations for tls literal pool entries. */
2691 case R_390_TLS_IE32:
2692 if (info->shared)
2693 {
2694 Elf_Internal_Rela outrel;
2695 asection *sreloc;
2696 bfd_byte *loc;
2697
2698 outrel.r_offset = rel->r_offset
2699 + input_section->output_section->vma
2700 + input_section->output_offset;
2701 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2702 sreloc = elf_section_data (input_section)->sreloc;
2703 if (sreloc == NULL)
2704 abort ();
2705 loc = sreloc->contents;
2706 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2707 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2708 }
2709 /* Fall through. */
2710
2711 case R_390_TLS_GD32:
2712 case R_390_TLS_GOTIE32:
2713 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2714 tls_type = GOT_UNKNOWN;
2715 if (h == NULL && local_got_offsets)
2716 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2717 else if (h != NULL)
2718 {
2719 tls_type = elf_s390_hash_entry(h)->tls_type;
2720 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2721 r_type = R_390_TLS_LE32;
2722 }
2723 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2724 r_type = R_390_TLS_IE32;
2725
2726 if (r_type == R_390_TLS_LE32)
2727 {
2728 /* This relocation gets optimized away by the local exec
2729 access optimization. */
2730 BFD_ASSERT (! unresolved_reloc);
2731 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2732 contents + rel->r_offset);
2733 continue;
2734 }
2735
2736 if (htab->sgot == NULL)
2737 abort ();
2738
2739 if (h != NULL)
2740 off = h->got.offset;
2741 else
2742 {
2743 if (local_got_offsets == NULL)
2744 abort ();
2745
2746 off = local_got_offsets[r_symndx];
2747 }
2748
2749 emit_tls_relocs:
2750
2751 if ((off & 1) != 0)
2752 off &= ~1;
2753 else
2754 {
2755 Elf_Internal_Rela outrel;
2756 bfd_byte *loc;
2757 int dr_type, indx;
2758
2759 if (htab->srelgot == NULL)
2760 abort ();
2761
2762 outrel.r_offset = (htab->sgot->output_section->vma
2763 + htab->sgot->output_offset + off);
2764
2765 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2766 if (r_type == R_390_TLS_GD32)
2767 dr_type = R_390_TLS_DTPMOD;
2768 else
2769 dr_type = R_390_TLS_TPOFF;
2770 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2771 outrel.r_addend = relocation - dtpoff_base (info);
2772 else
2773 outrel.r_addend = 0;
2774 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2775 loc = htab->srelgot->contents;
2776 loc += htab->srelgot->reloc_count++
2777 * sizeof (Elf32_External_Rela);
2778 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2779
2780 if (r_type == R_390_TLS_GD32)
2781 {
2782 if (indx == 0)
2783 {
2784 BFD_ASSERT (! unresolved_reloc);
2785 bfd_put_32 (output_bfd,
2786 relocation - dtpoff_base (info),
2787 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2788 }
2789 else
2790 {
2791 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2792 outrel.r_offset += GOT_ENTRY_SIZE;
2793 outrel.r_addend = 0;
2794 htab->srelgot->reloc_count++;
2795 loc += sizeof (Elf32_External_Rela);
2796 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2797 }
2798 }
2799
2800 if (h != NULL)
2801 h->got.offset |= 1;
2802 else
2803 local_got_offsets[r_symndx] |= 1;
2804 }
2805
2806 if (off >= (bfd_vma) -2)
2807 abort ();
2808 if (r_type == ELF32_R_TYPE (rel->r_info))
2809 {
2810 relocation = htab->sgot->output_offset + off;
2811 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2812 relocation += htab->sgot->output_section->vma;
2813 unresolved_reloc = FALSE;
2814 }
2815 else
2816 {
2817 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2818 contents + rel->r_offset);
2819 continue;
2820 }
2821 break;
2822
2823 case R_390_TLS_GOTIE12:
2824 case R_390_TLS_GOTIE20:
2825 case R_390_TLS_IEENT:
2826 if (h == NULL)
2827 {
2828 if (local_got_offsets == NULL)
2829 abort();
2830 off = local_got_offsets[r_symndx];
2831 if (info->shared)
2832 goto emit_tls_relocs;
2833 }
2834 else
2835 {
2836 off = h->got.offset;
2837 tls_type = elf_s390_hash_entry(h)->tls_type;
2838 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2839 goto emit_tls_relocs;
2840 }
2841
2842 if (htab->sgot == NULL)
2843 abort ();
2844
2845 BFD_ASSERT (! unresolved_reloc);
2846 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2847 htab->sgot->contents + off);
2848 relocation = htab->sgot->output_offset + off;
2849 if (r_type == R_390_TLS_IEENT)
2850 relocation += htab->sgot->output_section->vma;
2851 unresolved_reloc = FALSE;
2852 break;
2853
2854 case R_390_TLS_LDM32:
2855 if (! info->shared)
2856 /* The literal pool entry this relocation refers to gets ignored
2857 by the optimized code of the local exec model. Do nothing
2858 and the value will turn out zero. */
2859 continue;
2860
2861 if (htab->sgot == NULL)
2862 abort ();
2863
2864 off = htab->tls_ldm_got.offset;
2865 if (off & 1)
2866 off &= ~1;
2867 else
2868 {
2869 Elf_Internal_Rela outrel;
2870 bfd_byte *loc;
2871
2872 if (htab->srelgot == NULL)
2873 abort ();
2874
2875 outrel.r_offset = (htab->sgot->output_section->vma
2876 + htab->sgot->output_offset + off);
2877
2878 bfd_put_32 (output_bfd, 0,
2879 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2880 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2881 outrel.r_addend = 0;
2882 loc = htab->srelgot->contents;
2883 loc += htab->srelgot->reloc_count++
2884 * sizeof (Elf32_External_Rela);
2885 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2886 htab->tls_ldm_got.offset |= 1;
2887 }
2888 relocation = htab->sgot->output_offset + off;
2889 unresolved_reloc = FALSE;
2890 break;
2891
2892 case R_390_TLS_LE32:
2893 if (info->shared)
2894 {
2895 /* Linking a shared library with non-fpic code requires
2896 a R_390_TLS_TPOFF relocation. */
2897 Elf_Internal_Rela outrel;
2898 asection *sreloc;
2899 bfd_byte *loc;
2900 int indx;
2901
2902 outrel.r_offset = rel->r_offset
2903 + input_section->output_section->vma
2904 + input_section->output_offset;
2905 if (h != NULL && h->dynindx != -1)
2906 indx = h->dynindx;
2907 else
2908 indx = 0;
2909 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2910 if (indx == 0)
2911 outrel.r_addend = relocation - dtpoff_base (info);
2912 else
2913 outrel.r_addend = 0;
2914 sreloc = elf_section_data (input_section)->sreloc;
2915 if (sreloc == NULL)
2916 abort ();
2917 loc = sreloc->contents;
2918 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2919 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2920 }
2921 else
2922 {
2923 BFD_ASSERT (! unresolved_reloc);
2924 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2925 contents + rel->r_offset);
2926 }
2927 continue;
2928
2929 case R_390_TLS_LDO32:
2930 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2931 relocation -= dtpoff_base (info);
2932 else
2933 /* When converting LDO to LE, we must negate. */
2934 relocation = -tpoff (info, relocation);
2935 break;
2936
2937 /* Relocations for tls instructions. */
2938 case R_390_TLS_LOAD:
2939 case R_390_TLS_GDCALL:
2940 case R_390_TLS_LDCALL:
2941 tls_type = GOT_UNKNOWN;
2942 if (h == NULL && local_got_offsets)
2943 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2944 else if (h != NULL)
2945 tls_type = elf_s390_hash_entry(h)->tls_type;
2946
2947 if (tls_type == GOT_TLS_GD)
2948 continue;
2949
2950 if (r_type == R_390_TLS_LOAD)
2951 {
2952 if (!info->shared && (h == NULL || h->dynindx == -1))
2953 {
2954 /* IE->LE transition. Four valid cases:
2955 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2956 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2957 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2958 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2959 unsigned int insn, ry;
2960
2961 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2962 ry = 0;
2963 if ((insn & 0xff00f000) == 0x58000000)
2964 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2965 ry = (insn & 0x000f0000);
2966 else if ((insn & 0xff0f0000) == 0x58000000)
2967 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2968 ry = (insn & 0x0000f000) << 4;
2969 else if ((insn & 0xff00f000) == 0x5800c000)
2970 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2971 ry = (insn & 0x000f0000);
2972 else if ((insn & 0xff0f0000) == 0x580c0000)
2973 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2974 ry = (insn & 0x0000f000) << 4;
2975 else
2976 invalid_tls_insn (input_bfd, input_section, rel);
2977 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2978 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2979 }
2980 }
2981 else if (r_type == R_390_TLS_GDCALL)
2982 {
2983 unsigned int insn;
2984
2985 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2986 if ((insn & 0xff000fff) != 0x4d000000 &&
2987 (insn & 0xffff0000) != 0xc0e50000)
2988 invalid_tls_insn (input_bfd, input_section, rel);
2989 if (!info->shared && (h == NULL || h->dynindx == -1))
2990 {
2991 if ((insn & 0xff000000) == 0x4d000000)
2992 {
2993 /* GD->LE transition.
2994 bas %r14,0(%rx,%r13) -> bc 0,0 */
2995 insn = 0x47000000;
2996 }
2997 else
2998 {
2999 /* GD->LE transition.
3000 brasl %r14,_tls_get_addr@plt -> brcl 0,. */
3001 insn = 0xc0040000;
3002 bfd_put_16 (output_bfd, 0x0000,
3003 contents + rel->r_offset + 4);
3004 }
3005 }
3006 else
3007 {
3008 if ((insn & 0xff000000) == 0x4d000000)
3009 {
3010 /* GD->IE transition.
3011 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3012 insn = 0x5822c000;
3013 }
3014 else
3015 {
3016 /* GD->IE transition.
3017 brasl %r14,__tls_get_addr@plt ->
3018 l %r2,0(%r2,%r12) ; bcr 0,0 */
3019 insn = 0x5822c000;
3020 bfd_put_16 (output_bfd, 0x0700,
3021 contents + rel->r_offset + 4);
3022 }
3023 }
3024 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3025 }
3026 else if (r_type == R_390_TLS_LDCALL)
3027 {
3028 if (!info->shared)
3029 {
3030 unsigned int insn;
3031
3032 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3033 if ((insn & 0xff000fff) != 0x4d000000 &&
3034 (insn & 0xffff0000) != 0xc0e50000)
3035 invalid_tls_insn (input_bfd, input_section, rel);
3036 if ((insn & 0xff000000) == 0x4d000000)
3037 {
3038 /* LD->LE transition.
3039 bas %r14,0(%rx,%r13) -> bc 0,0 */
3040 insn = 0x47000000;
3041 }
3042 else
3043 {
3044 /* LD->LE transition.
3045 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3046 insn = 0xc0040000;
3047 bfd_put_16 (output_bfd, 0x0000,
3048 contents + rel->r_offset + 4);
3049 }
3050 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3051 }
3052 }
3053 continue;
3054
3055 default:
3056 break;
3057 }
3058
3059 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3060 because such sections are not SEC_ALLOC and thus ld.so will
3061 not process them. */
3062 if (unresolved_reloc
3063 && !((input_section->flags & SEC_DEBUGGING) != 0
3064 && h->def_dynamic))
3065 (*_bfd_error_handler)
3066 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3067 input_bfd,
3068 input_section,
3069 (long) rel->r_offset,
3070 howto->name,
3071 h->root.root.string);
3072
3073 if (r_type == R_390_20
3074 || r_type == R_390_GOT20
3075 || r_type == R_390_GOTPLT20
3076 || r_type == R_390_TLS_GOTIE20)
3077 {
3078 relocation += rel->r_addend;
3079 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3080 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3081 contents, rel->r_offset,
3082 relocation, 0);
3083 }
3084 else
3085 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3086 contents, rel->r_offset,
3087 relocation, rel->r_addend);
3088
3089 if (r != bfd_reloc_ok)
3090 {
3091 const char *name;
3092
3093 if (h != NULL)
3094 name = h->root.root.string;
3095 else
3096 {
3097 name = bfd_elf_string_from_elf_section (input_bfd,
3098 symtab_hdr->sh_link,
3099 sym->st_name);
3100 if (name == NULL)
3101 return FALSE;
3102 if (*name == '\0')
3103 name = bfd_section_name (input_bfd, sec);
3104 }
3105
3106 if (r == bfd_reloc_overflow)
3107 {
3108
3109 if (! ((*info->callbacks->reloc_overflow)
3110 (info, (h ? &h->root : NULL), name, howto->name,
3111 (bfd_vma) 0, input_bfd, input_section,
3112 rel->r_offset)))
3113 return FALSE;
3114 }
3115 else
3116 {
3117 (*_bfd_error_handler)
3118 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3119 input_bfd, input_section,
3120 (long) rel->r_offset, name, (int) r);
3121 return FALSE;
3122 }
3123 }
3124 }
3125
3126 return TRUE;
3127 }
3128
3129 /* Finish up dynamic symbol handling. We set the contents of various
3130 dynamic sections here. */
3131
3132 static bfd_boolean
3133 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3134 bfd *output_bfd;
3135 struct bfd_link_info *info;
3136 struct elf_link_hash_entry *h;
3137 Elf_Internal_Sym *sym;
3138 {
3139 struct elf_s390_link_hash_table *htab;
3140
3141 htab = elf_s390_hash_table (info);
3142
3143 if (h->plt.offset != (bfd_vma) -1)
3144 {
3145 bfd_vma plt_index;
3146 bfd_vma got_offset;
3147 Elf_Internal_Rela rela;
3148 bfd_byte *loc;
3149 bfd_vma relative_offset;
3150
3151 /* This symbol has an entry in the procedure linkage table. Set
3152 it up. */
3153 if (h->dynindx == -1
3154 || htab->splt == NULL
3155 || htab->sgotplt == NULL
3156 || htab->srelplt == NULL)
3157 abort ();
3158
3159 /* Calc. index no.
3160 Current offset - size first entry / entry size. */
3161 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3162
3163 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3164 addr & GOT addr. */
3165 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3166
3167 /* S390 uses halfwords for relative branch calc! */
3168 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3169 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3170 /* If offset is > 32768, branch to a previous branch
3171 390 can only handle +-64 K jumps. */
3172 if ( -32768 > (int) relative_offset )
3173 relative_offset
3174 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3175
3176 /* Fill in the entry in the procedure linkage table. */
3177 if (!info->shared)
3178 {
3179 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3180 htab->splt->contents + h->plt.offset);
3181 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3182 htab->splt->contents + h->plt.offset + 4);
3183 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3184 htab->splt->contents + h->plt.offset + 8);
3185 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3186 htab->splt->contents + h->plt.offset + 12);
3187 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3188 htab->splt->contents + h->plt.offset + 16);
3189 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3190 htab->splt->contents + h->plt.offset + 20);
3191 bfd_put_32 (output_bfd,
3192 (htab->sgotplt->output_section->vma
3193 + htab->sgotplt->output_offset
3194 + got_offset),
3195 htab->splt->contents + h->plt.offset + 24);
3196 }
3197 else if (got_offset < 4096)
3198 {
3199 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3200 htab->splt->contents + h->plt.offset);
3201 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3202 htab->splt->contents + h->plt.offset + 4);
3203 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3204 htab->splt->contents + h->plt.offset + 8);
3205 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3206 htab->splt->contents + h->plt.offset + 12);
3207 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3208 htab->splt->contents + h->plt.offset + 16);
3209 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3210 htab->splt->contents + h->plt.offset + 20);
3211 bfd_put_32 (output_bfd, (bfd_vma) 0,
3212 htab->splt->contents + h->plt.offset + 24);
3213 }
3214 else if (got_offset < 32768)
3215 {
3216 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3217 htab->splt->contents + h->plt.offset);
3218 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3219 htab->splt->contents + h->plt.offset + 4);
3220 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3221 htab->splt->contents + h->plt.offset + 8);
3222 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3223 htab->splt->contents + h->plt.offset + 12);
3224 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3225 htab->splt->contents + h->plt.offset + 16);
3226 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3227 htab->splt->contents + h->plt.offset + 20);
3228 bfd_put_32 (output_bfd, (bfd_vma) 0,
3229 htab->splt->contents + h->plt.offset + 24);
3230 }
3231 else
3232 {
3233 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3234 htab->splt->contents + h->plt.offset);
3235 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3236 htab->splt->contents + h->plt.offset + 4);
3237 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3238 htab->splt->contents + h->plt.offset + 8);
3239 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3240 htab->splt->contents + h->plt.offset + 12);
3241 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3242 htab->splt->contents + h->plt.offset + 16);
3243 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3244 htab->splt->contents + h->plt.offset + 20);
3245 bfd_put_32 (output_bfd, got_offset,
3246 htab->splt->contents + h->plt.offset + 24);
3247 }
3248 /* Insert offset into reloc. table here. */
3249 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3250 htab->splt->contents + h->plt.offset + 28);
3251
3252 /* Fill in the entry in the global offset table.
3253 Points to instruction after GOT offset. */
3254 bfd_put_32 (output_bfd,
3255 (htab->splt->output_section->vma
3256 + htab->splt->output_offset
3257 + h->plt.offset
3258 + 12),
3259 htab->sgotplt->contents + got_offset);
3260
3261 /* Fill in the entry in the .rela.plt section. */
3262 rela.r_offset = (htab->sgotplt->output_section->vma
3263 + htab->sgotplt->output_offset
3264 + got_offset);
3265 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3266 rela.r_addend = 0;
3267 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3268 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3269
3270 if (!h->def_regular)
3271 {
3272 /* Mark the symbol as undefined, rather than as defined in
3273 the .plt section. Leave the value alone. This is a clue
3274 for the dynamic linker, to make function pointer
3275 comparisons work between an application and shared
3276 library. */
3277 sym->st_shndx = SHN_UNDEF;
3278 }
3279 }
3280
3281 if (h->got.offset != (bfd_vma) -1
3282 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3283 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3284 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3285 {
3286 Elf_Internal_Rela rela;
3287 bfd_byte *loc;
3288
3289 /* This symbol has an entry in the global offset table. Set it
3290 up. */
3291
3292 if (htab->sgot == NULL || htab->srelgot == NULL)
3293 abort ();
3294
3295 rela.r_offset = (htab->sgot->output_section->vma
3296 + htab->sgot->output_offset
3297 + (h->got.offset &~ (bfd_vma) 1));
3298
3299 /* If this is a static link, or it is a -Bsymbolic link and the
3300 symbol is defined locally or was forced to be local because
3301 of a version file, we just want to emit a RELATIVE reloc.
3302 The entry in the global offset table will already have been
3303 initialized in the relocate_section function. */
3304 if (info->shared
3305 && (info->symbolic
3306 || h->dynindx == -1
3307 || h->forced_local)
3308 && h->def_regular)
3309 {
3310 BFD_ASSERT((h->got.offset & 1) != 0);
3311 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3312 rela.r_addend = (h->root.u.def.value
3313 + h->root.u.def.section->output_section->vma
3314 + h->root.u.def.section->output_offset);
3315 }
3316 else
3317 {
3318 BFD_ASSERT((h->got.offset & 1) == 0);
3319 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3320 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3321 rela.r_addend = 0;
3322 }
3323
3324 loc = htab->srelgot->contents;
3325 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3326 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3327 }
3328
3329 if (h->needs_copy)
3330 {
3331 Elf_Internal_Rela rela;
3332 bfd_byte *loc;
3333
3334 /* This symbols needs a copy reloc. Set it up. */
3335
3336 if (h->dynindx == -1
3337 || (h->root.type != bfd_link_hash_defined
3338 && h->root.type != bfd_link_hash_defweak)
3339 || htab->srelbss == NULL)
3340 abort ();
3341
3342 rela.r_offset = (h->root.u.def.value
3343 + h->root.u.def.section->output_section->vma
3344 + h->root.u.def.section->output_offset);
3345 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3346 rela.r_addend = 0;
3347 loc = htab->srelbss->contents;
3348 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3349 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3350 }
3351
3352 /* Mark some specially defined symbols as absolute. */
3353 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3354 || h == htab->elf.hgot
3355 || h == htab->elf.hplt)
3356 sym->st_shndx = SHN_ABS;
3357
3358 return TRUE;
3359 }
3360
3361 /* Used to decide how to sort relocs in an optimal manner for the
3362 dynamic linker, before writing them out. */
3363
3364 static enum elf_reloc_type_class
3365 elf_s390_reloc_type_class (rela)
3366 const Elf_Internal_Rela *rela;
3367 {
3368 switch ((int) ELF32_R_TYPE (rela->r_info))
3369 {
3370 case R_390_RELATIVE:
3371 return reloc_class_relative;
3372 case R_390_JMP_SLOT:
3373 return reloc_class_plt;
3374 case R_390_COPY:
3375 return reloc_class_copy;
3376 default:
3377 return reloc_class_normal;
3378 }
3379 }
3380
3381 /* Finish up the dynamic sections. */
3382
3383 static bfd_boolean
3384 elf_s390_finish_dynamic_sections (output_bfd, info)
3385 bfd *output_bfd;
3386 struct bfd_link_info *info;
3387 {
3388 struct elf_s390_link_hash_table *htab;
3389 bfd *dynobj;
3390 asection *sdyn;
3391
3392 htab = elf_s390_hash_table (info);
3393 dynobj = htab->elf.dynobj;
3394 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3395
3396 if (htab->elf.dynamic_sections_created)
3397 {
3398 Elf32_External_Dyn *dyncon, *dynconend;
3399
3400 if (sdyn == NULL || htab->sgot == NULL)
3401 abort ();
3402
3403 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3404 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3405 for (; dyncon < dynconend; dyncon++)
3406 {
3407 Elf_Internal_Dyn dyn;
3408 asection *s;
3409
3410 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3411
3412 switch (dyn.d_tag)
3413 {
3414 default:
3415 continue;
3416
3417 case DT_PLTGOT:
3418 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3419 break;
3420
3421 case DT_JMPREL:
3422 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3423 break;
3424
3425 case DT_PLTRELSZ:
3426 s = htab->srelplt->output_section;
3427 dyn.d_un.d_val = s->size;
3428 break;
3429 }
3430
3431 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3432 }
3433
3434 /* Fill in the special first entry in the procedure linkage table. */
3435 if (htab->splt && htab->splt->size > 0)
3436 {
3437 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3438 if (info->shared)
3439 {
3440 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3441 htab->splt->contents );
3442 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3443 htab->splt->contents +4 );
3444 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3445 htab->splt->contents +8 );
3446 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3447 htab->splt->contents +12 );
3448 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3449 htab->splt->contents +16 );
3450 }
3451 else
3452 {
3453 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3454 htab->splt->contents );
3455 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3456 htab->splt->contents +4 );
3457 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3458 htab->splt->contents +8 );
3459 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3460 htab->splt->contents +12 );
3461 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3462 htab->splt->contents +16 );
3463 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3464 htab->splt->contents +20 );
3465 bfd_put_32 (output_bfd,
3466 htab->sgotplt->output_section->vma
3467 + htab->sgotplt->output_offset,
3468 htab->splt->contents + 24);
3469 }
3470 elf_section_data (htab->splt->output_section)
3471 ->this_hdr.sh_entsize = 4;
3472 }
3473
3474 }
3475
3476 if (htab->sgotplt)
3477 {
3478 /* Fill in the first three entries in the global offset table. */
3479 if (htab->sgotplt->size > 0)
3480 {
3481 bfd_put_32 (output_bfd,
3482 (sdyn == NULL ? (bfd_vma) 0
3483 : sdyn->output_section->vma + sdyn->output_offset),
3484 htab->sgotplt->contents);
3485 /* One entry for shared object struct ptr. */
3486 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3487 /* One entry for _dl_runtime_resolve. */
3488 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3489 }
3490
3491 elf_section_data (htab->sgotplt->output_section)
3492 ->this_hdr.sh_entsize = 4;
3493 }
3494 return TRUE;
3495 }
3496
3497 static bfd_boolean
3498 elf_s390_grok_prstatus (abfd, note)
3499 bfd * abfd;
3500 Elf_Internal_Note * note;
3501 {
3502 int offset;
3503 unsigned int size;
3504
3505 switch (note->descsz)
3506 {
3507 default:
3508 return FALSE;
3509
3510 case 224: /* S/390 Linux. */
3511 /* pr_cursig */
3512 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3513
3514 /* pr_pid */
3515 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3516
3517 /* pr_reg */
3518 offset = 72;
3519 size = 144;
3520 break;
3521 }
3522
3523 /* Make a ".reg/999" section. */
3524 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3525 size, note->descpos + offset);
3526 }
3527
3528 /* Return address for Ith PLT stub in section PLT, for relocation REL
3529 or (bfd_vma) -1 if it should not be included. */
3530
3531 static bfd_vma
3532 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3533 const arelent *rel ATTRIBUTE_UNUSED)
3534 {
3535 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3536 }
3537
3538
3539 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3540 #define TARGET_BIG_NAME "elf32-s390"
3541 #define ELF_ARCH bfd_arch_s390
3542 #define ELF_MACHINE_CODE EM_S390
3543 #define ELF_MACHINE_ALT1 EM_S390_OLD
3544 #define ELF_MAXPAGESIZE 0x1000
3545
3546 #define elf_backend_can_gc_sections 1
3547 #define elf_backend_can_refcount 1
3548 #define elf_backend_want_got_plt 1
3549 #define elf_backend_plt_readonly 1
3550 #define elf_backend_want_plt_sym 0
3551 #define elf_backend_got_header_size 12
3552 #define elf_backend_rela_normal 1
3553
3554 #define elf_info_to_howto elf_s390_info_to_howto
3555
3556 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3557 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3558 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3559
3560 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3561 #define elf_backend_check_relocs elf_s390_check_relocs
3562 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3563 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3564 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3565 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3566 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3567 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3568 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3569 #define elf_backend_relocate_section elf_s390_relocate_section
3570 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3571 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3572 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3573 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3574
3575 #define bfd_elf32_mkobject elf_s390_mkobject
3576 #define elf_backend_object_p elf_s390_object_p
3577
3578 #include "elf32-target.h"
GDB Binutils - Deliverables
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